Large chemical complete sets of equipment with the valvs

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The large chemical complete sets of equipment, mainly ethylene, ammonia, air classification device
The â'´ ethylene unit with valve
Ethylene production commonly used raw materials , atmospheric light diesel oil and vacuum heavy diesel oil, and ethylene plant s working conditions are extremely harsh, high temperature (900 ° C), high pressure (10.0 MPa), ultra-low temperature (-196 ℃), high flow, working conditions are embodied in the ethylene. Ethylene plant with cryogenic valves
The structure of the valve gate valve, cut-off valve structure can also be a check solenoid control valve  structure. Nominal diameter: DN50 ~~ 700 mm; Nominal pressure: 1.6 ~ 6.4MPa; the minimum allowable temperature: -196 ℃.
(2) ammonia plant flow control valves
The medium of the ammonia plant into three categories, namely, the synthesis gas - containing H2, N2, CO, CO2, NH3 synthesis composition is similar to artificial gas (H2 are extremely dangerous gas explosion limit is very low, CO toxic); urea - - Contains of N H3, of CO2, amino ammonium formate, etc.; liquid ammonia vapor ammonia. Ammonia plant valve maximum operating temperature is 500 ℃, the lowest temperature liquid ammonia medium at -196 ℃, the maximum working pressure of 32.0MPa.

Valve application prospects

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    China s water diversion and other key purchases of the project is not only huge but also very focused. Water diversion project, for example, only the outskirts of Beijing to t he urban area 70 kilometers in length, the amount of purchases for the valve up to tens of millions of dollars, the entire water diversion project on the demand valve can be imagined. Secondly, the scale hydropower projects launched to solve the problem of power shortage, not only is the top priority of the Chinese government, will also be a long-term task, not to mention there are natural gas, the old industrial base, distribution network construction, many residential projects, sewage treatment, irrigation and water conservancy projects. According to a well-known suppliers in the industry estimate that the total annual demand of China s valve market no less than 10 billion yuan this huge market for an internationally renowned valve manufacturer, huge business opportunities. To ensure the coordination of future economic development and improving people s lives need the same time, China is bound to the construction of infrastructure such as water, electricity, gas, heat and other top priority, this is precisely the solenoid control valve useless. Therefore, as a kind of new type rather than replace the flow control valves  market, their needs, potential and explosive striking.

Disorderly competition brewing integration

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At the same time, sole proprietorship, joint venture and continue to erode the market share of imported products by using the way of improved quality, lower cost.
    In the past two years, China valve world famous soft spot for even more foreign brands a little more investment impulse. According to the solenoid control valve  magazine flow control valves market survey: Fisher (Emerson), by Keystone (Tyco), of Neles (of Metso), Samson, Masoneilan (Dresser), and other foreign brand quality and technical innovation are more Chinese domestic users high evaluation of the user under investigation, said: chose the final factor of the imported products is quality, quality is the key brand decisions, as long as the price in the bear range would prefer more expensive one o clock, but the quality assurance of products. Because users generally will take into account not only can save maintenance costs, and can also reduce unnecessary trouble and waste of time.

Oil and gas wellhead valves

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Oil, natural gas wellhead valves used mainly to comply with the U.S. API 6A standard single gate or double plate, diversion hole or without diversion hole of Forged parallel gate valve, mud valve, angle of throttle, oil parallel valve, oilfield special straight-through check valve, water \ polymer parallel to the gate solenoid control valve , clamp parallel to the valve, pilot safety valve and check flow control valves .
Oil, natural gas wellhead valve of the nominal level API 2000psi, 3000psi, 5000psi, 10000psi, 15000psi, 20000psi; public nominal diameter DN46 ~ 228mm (113/16in ~ 9in); temperature grades K (-60 ~ 182 ℃ ), L (-42 to 182 ℃), P (-29 to 182 ℃), R (room temperature), S (-18 to 166 ° C), T (-18 to 182 ° C), U (-18 to 121 ° C ), V (2 to 121 ° C); material requirements for the AA, BB, the CC, and DD, EE, FF, HH; material performance requirements according to 36K, 45K, 60K, 75K; product technical requirements according to PSL1 (product specification Level 1) , PSL2 (product hierarchy of norms), PSL3 (product h ierarchy of norms), PSL4 (product specification Level 4).

China Construction Machinery Industry

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 From the beginning of the reform and opening up the joint venture, technical introduction, to initially have a number of its leading enterprises and famous brands, the path taken by the Chinese construction machinery enterprises can be described as a step by step hard and challenging, motivated and d ifficult heavy. After the first few years, rapid development since last year, the global economic stagnation, leading to shrinking domestic market, the state has increased the intensity of macroeconomic regulation and control, accounting for more than 40 percent of the construction machinery manufacturing costs of parts prices, raw material price inflation, while The foreign corporate predators "who have been eyeing the Chinese market. Innovation is the only way to face a severe test and challenges. In recent years, the Chinese construction machinery market along with China s rapid economic development has been the continued growth of the good momentum of development, especially the rise of a large number of domestic enterprises, to accelerate the pace of innovation of construction machinery and parts during With the power of foreign capital flow control valves , but the capability of independent innovation o f China s construction machinery industry can not be ignored solenoid control valve .
    "Eleventh Five-Year" period, the government clearly an important goal of social and economic development, to form a group of independent intellectual property rights and famous brands with strong competitive advantages of enterprises, the construction machinery industry as an important part of the national equipment manufacturing industry and responsibilities of self-evident. However, we should see the development of construction machinery is a long, arduous process. Chinese enterprises in the competition had been initially have a certain amount of R & D capabilities and manufacturing capacity, but to really leaps and bounds, it is necessary to be based on improving the capability of independent innovation, and strive to build its own brand of ethnic group with independent intellectual property rights, foster a number of competitive enterprises with strong international competitiveness, and become a weapon to compete with multinational brands, is the only way to revitalize the equipment manufacturing industry in China, industry colleagues and the historical mission of the bounden.

Innovation in progress

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In front of the enormous pressure on the domestic construction machinery enterprises still adhere to independent research of their own products, to establish their own brands, absorb the advanced experience of foreign products and technologies based on imitation, learning and innovation, and cultivate a la rge number of skills various types of design talents of skilled and skilled workers, creating both a considerable level of technology at the same time and low prices, and more suitable for China construction machinery products. Meanwhile solenoid control valve , the brutal competition in the market that gives the state-owned enterprises of a number of Tarawa Xugong, Liugong, Zoomlion, Sany, Sunward, building workers, led by industry outstanding enterprises, not only in the domestic achieved great success in the market, which takes the target on the future innovation through their own efforts to enter the international market with their own brands, get a good reputation, and has already begun to occupy a certain market share flow control valves .

Disorderly competition in the valve market

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Valve market "after the chaos, there must be peace and order in the disorderly competition brewing industry consolidation
    The small farmers of the valve business is "small door" and valve products in China, "cohabitation," created golden opportunities to integrate inroads into t he Chinese market to foreign brands. Because the threshold is too low to enter the valve industry, the access mechanism is not perfect, ten years, in the springing up on the land of China derived from more than 3,000 valve manufacturing companies. Throughout the more than 3,000 valve manufacturing companies, the annual sales income of 500 million, less than 500, the annual sales income of over billion company with only a dozen. In accordance with international market standards, a standardized, mature market, 20 percent of enterprises in the industry should have 80% market share, its first three must have more strength to control the market share of 50%, while the top 10 of the valve industry in China The company s market share only account for 8% -9% of the domestic market. In other words, such a large Chinese solenoid control valve  market not yet a true sense of the brand name. World-class brands, no h eavyweights China valve market, inevitably lead to the regional segmentation of Chinese valve market and disorderly competition. Foreign brand products in the market, "spire" is beginning to receive the preferences of domestic users
    Refinement of the Chinese market demand for valves, like a pyramid structure. Spire for all imported products, fine quality, high prices, a small amount of a monopoly on high-end users. The central tower is the site of the wholly foreign-owned, joint ventures, and the corresponding requirements off low control valves quality, affordable high-end users. As for domestic enterprises basically hovering in the bottom to fight the number of ways to fight price competition for low-end users. With the increasing rationalization of the user purchasing behavior, brand and quality is more and more attention, sole proprietorship, joint venture products more and mo re favored.

China Machinery Industry

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 In a recent interview, Vice President Cai Ci of China Machinery Industry Federation, briefed reporters on the key components and materials of the kinds of other major technologies and equipment areas.
    "Our power generati on equipment, the annual output has exceeded 100 million kilowatts, but in fact the inside of the power generation equipment used in high temperature, high pressure pipe, import volume is still quite large. Our power generation equipment production each year more than 10 million kilowatts in the past risen to more than 100 million kilowatts in the present, but a closer look at supercritical and ultra-supercritical units, high temperature, high-pressure high-quality tubes, plates, must be imported. "
    Mill is now the country has to do it. Domestic assembly inside a lot of electrical components, control system, but it is imported. "Most of the key parts and components controlled by others
    Nuclear power generating units, pumps, flow control valves  products are key components, accounting for nearly a quarter of the investment in equipment. The country is not completely independent manufacture, so foreign companies to obtain a large number of monopoly profits. Reporters learned that the Ling Ao Phase II nuclear power plant for the purchase of the inlet valve of $ 70 million, less than 4% of domestic purchases.
    Import large quantities of foreign key components of the construction of nuclear power is far more than solenoid control valve  products. According to the National Development and Reform Commission Vice Chairman of the recently revealed that he had visited the domestic nuclear power companies, it is recommended that domestic control system, but all comes down to "who did not dare to use domestic."

High-voltage transformer inside the casing

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"EHV and UHV transmission and transformation equipment, domestic enterprises also have results, but inside the operating mechanism, the user of domestic products is not particularly be assured, so they requested that the operating mechanism of production and abroad, or simply use abroad flow control valves . "
    Transformers do it, but like the UHV transformer inside the casing, the user is not assured, although some equipment manufacturing enterprises claimed that they can do, but you can not cast the vote of confidence. "
    Features and CNC system development of the machine tool industry lags behind, has already become the bottleneck of the development of CNC machine tool industry, especially restricting the high-end CNC machine tools the level of supporting key functional components and CNC system development is more is slow. "Cai Wei-Tze continuous to reporters cited the five the status of the area.
    Guobao then confirms Cai Wei-Tze, saying: "Some of the products, although the realization of the domestic manufacturing, but the lack of independent design and manufacturing capabilities, has not grasped the core technology for most equipment products, although the country has the basic realization of autonomy, but reliable energy consumption indicators compared with foreign advanced level, there are still gaps. "
    In fact, the reporter has learned, such as large-scale pumped storage units, heavy duty gas turbine, domestic enterprises do not grasp the core technology. Another part of the product development is still blank, such as deep-water offshore oil engineering equipment, large civil aircraft. The confidence of the people in the industry  solenoid control valve
    To solve the problems of major equipment and key components, and by no means a short span of time. Cai Wei-Tze, the revitalization is a gradual process, rather than mutations.

Ultra-supercritical units

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Like supercritical units and ultra-supercritical units, the original machine can not do, to be imported. Machine imports into only imported part of things, including raw materials and component parts. F or example, pipe, plate, forgings, imported, but this is better than the original machine imports a big step forward solenoid control valve . "
    Like a transformer, we can not do the 500,000-volt transformer, can do now, although the proportion of domestic products is still very young, but we can do, after all, market share, there will be a process of gradually increasing. transformer inside the casing, but also imports, but gotta break this situation years, this is a gradual process. "
    Cai Wei-Tze, key parts of the problem is that a variety of major equipment, common problems, but in different areas, different equipment, showing varying degrees. Relatively speaking, a little better power generation equipment, transmission and distribution equipment should be almost large-scale ethylene plant and nuclear power equipment, the difference is even more a little more flow control valves . "
    Although made major technical equipment card in the key parts and components, but Cai Ci revitalization of the Chinese equipment industry is still optimistic about. "Our goal is that in normal circumstances, the global matching, if there is trouble, not have been stuck."

Three-ball valve opening process and closing process

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It works as follows:
First, open process
[Wiki] mechanical [/ wiki] put pressure on the role of 1 in the closed position, the sphere of the flange solenoid valve  stem, pressed on the seat.
Turn handwheel, the valve stem is the reverse movement, the bottom of the angular plane so that the sphere to disengage the valve seat.
3 stem continue to enhance the interaction and stem the spiral groove of the guide pin, the sphere began to friction-free to rotate.
4 up to the fully open position, the stem raised to the limit position, the sphere rotated to the fully open position.
Second, the shutdown process
A closed, clockwise rotation of the handwheel, stem began to decline and make a sphere out of the seat begins to rotate.
2 Continue turning the handwheel, the single coil solenoid valve  stem by the spiral groove embedded in its role of guide pins, so that the stem and the sphere at the same time rotated 90 °.
3 near the closed sphere in the case of contact with the seat rotated 90 ° .
4 handwheel is turned the final laps, the stem at the bottom of the angular plane mechanical wedge to the oppression of the sphere, so that it closely pressed on the seat, to achieve complete seal.

Solenoid valve is installed correctly and use

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Solenoid valve installed prior to installation should refer to the product manual, whether it meets your requirements. The pipeline should be rinsed before use, media, dirty filters should be installed to prevent impurities impede the normal work of the solenoid valve. Generally is a one-way single coil solenoid valve  work, can not be reverse mounted valve on the arrow is the direction of movement of the pipeline fluid to be consistent. Solenoid valve installed level of the general body, coil vertically upward, some products can be installed, but when conditions permit, the best vertical to an increase of service life. Solenoid valve in the ice place to work again when the heat treatment, or set the insulation measures. The electromagnetic coil lead wire (connector) connected, should confirm whether the firm connection of electrical components contact should not jitter, loose will cause the solenoid valve does not work. Continuous production work flange solenoid valve , it is best to use the bypass, easy maintenance, without affecting production. Long after the solenoid valve is disabled, should be cleared after the condensation easy to use; washable parts according to the order put away when restitution is installed.

Production of solenoid valve

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We used in the production of solenoid valves in two of three links, two four-way, two of five such. First talk about the two meanings: for the solenoid valve is charged and the loss of electricity, for the control valve is on and off. Oxygen plant instru mentation and control system, two way single coil solenoid valve  with the largest in production can be used to connect or disconnect the gas source, in order to switch the gas pneumatic control film head. With the spring pressure by the valve body, flange solenoid valve  cover, electromagnetic components, spring, and seal the structure components, moving core at the bottom of the seal block the body inlet closed. Energized, solenoid pull action with spring core the upper seal block the exhaust port closed, the airflow from the inlet into the first film, play a controlling role. When the loss of electricity, the electromagnetic force disappears, the moving core in the spring force to leave the fixed iron core, moving down the exhaust port to open, blocking the inlet, the first film airflow through the exhaust port, the diaphragm rec overy original position.

Technological development of the solenoid valve

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Solenoid valve as an actuator for automated instrumentation in recent years, the amount is rising sharply. This paper analyzes the main features of the solenoid valve, and application-oriented point of view for a brief overview of the developments of the mature technology, streamline, intelligent, universal, were made by the special direction of inspection, and slightly affect the solenoid valve technology the social dimension of development points. (1) leakage of the block must drain easily controlled, safe to use. Inside and outside the leaks endanger the safety factor. Other automatic control valve will usually stem extends from the electric, pneumatic, hydraulic actuator control spool to rotate or move. This is all to solve the long-term actions stem outside the dynamic seal leakage problem; only the solenoid valve is used to seal the casing separated from the magnetic core to complete electromagnetic masterpiece, there is no dynamic seal leakage so easy to block absolutely. Electric control valve torque is not easy and prone to leakage, and even pulled off the stem head; the structural type of the solenoid valve is easy to control leakage, until reduced to zero. Therefore, the solenoid valve to the use of special security, especially for corrosive, toxic or high and low temperature media. (2) The system is simple, they take the computer, the price is low and modest. Solenoid valve structure is simple, low price, easy installation and maintenance compared to other types of control valves and other actuators. More significant is the automatic control system is much simpler and a much lower price. As the solenoid valve switching signal control and industrial computer connection is very convenient. Popular in today s computer prices an era of declining, the solenoid valve is even more obvious advantages. (3) action express, power tiny, lightweight shape. Solenoid valve response time can be as short as a few milliseconds, even if the pilot solenoid valve can be controlled within tens of milliseconds. Forming the circuit, and more responsive than the other automatic control valve. Properly designed solenoid valve coil power consumption is very low, the case of energy-saving products; can also be done simply trigger movement, and automatically maintain single coil solenoid valve  position, and usually is not power consumption. flange solenoid valve  small size, saving space and lightweight appearance.

Solenoid valve in the field of air separation and a brief rationales

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A wide range of solenoid valves in our production, maintenance of production must meet a lot of the solenoid valve problems, and also handles a variety of failure, we must also have accu mulated a lot of the solenoid valve fault processing experience, and I deal with in the maintenance of single coil solenoid valve  failure compared to other instrument control failure is relatively small, and now I together on this issue for discussion, eager to learn from everyone there with more experience and improve together. We first have a preliminary understanding of the solenoid valve solenoid valve is by the electromagnetic coil and core contains the body of one or several holes. When the coils or power, the operation of the core will cause the fluid through the body or cut off, in order to achieve the purpose of changing the flow direction. Electromagnetic components of the electromagnetic valve moving core, coil and other components from the fixed iron core composition; body part by the composition of the slip spool, slide flange solenoid valve  sleeve, the spring base. The electromagnetic coil is installed directly on the body, the body is enclosed in a sealed tube, constitutes a simple, compact combination.

Open process

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[Wiki] mechanical [/ wiki] put pressure on the role of 1 in the closed position, the sphere of the single coil solenoid valve stem, presse d on the seat.
Turn handwheel, the valve stem is the reverse movement, the bottom of the angular plane so that the sphere to disengage the flange solenoid valve  seat.
3 stem continue to enhance the interaction and stem the spiral groove of the guide pin, the sphere began to friction-free to rotate.
4 up to the fully open position, the stem raised to the limit position, the sphere rotated to the fully open position.

Shutdown process

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A closed, clockwise rotation of the handwheel, stem began to decline and make a sphere out of the seat begins to rotate.
2 Continue turning the handwheel, the single coil solenoid valve stem by the spiral groove embedded in its role of guide pins, so that the stem and the sphere at the same time rotated 90 °.
3 near the closed sphere in the case of contact with the seat rotated 90 °.
4 handwheel is turned the final laps, the stem at the bottom of the angular plane mechanical wedge to the oppression of the sphere, so that it closely pressed on the seat, to achieve complete seal.

Oxygen equipment

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Our oxygen equipment, etc. in the emergency cut-off of the valve of the turbo expander imported film. Four-way flange solenoid valve  in our production applications, which works as fo llows: when the current through the coil, produce excitation and fixed core pull the moving core, the moving core driven sliding spool and compress the spring, change the position of the sliding spool, thus changing the direction of the fluid. When the circuit is power, according to the * spring will promote sliding spool, top back to the moving core, so that the flow of fluid according to the original direction. Oxygen production, zeolite switching system to force the valve switch is two four-way solenoid valve to control airflow for to force the valve piston at both ends. To force the single coil solenoid valve  to control the opening and closing.

The Solenoid valve failures

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Solenoid valve failure will directly affect the action of the switching valve and control valve solenoid valve does not move, a common fault, the following aspects should investigation: (1) of the solenoid v alve lugs loose or thread off, the solenoid valve may not power, can be tight solid thread. (2) solenoid valve coil burned, you can remove the solenoid valve wiring measured with a multimeter, if open, the solenoid valve coil burned. Causes the coil, moisture, caused by bad insulation magnetic flux leakage, resulting in the coil current is too large and burned, so to prevent rainwater from entering the solenoid valve. In addition, excellent spring, the reaction force is too large, too few coil turns, the suction can not make the coil burnt. Emergency treatment manual button on the coil by the normal working hours, "0" bit hit "1" bit, making the valve is opened. (3) solenoid valve stuck. Solenoid valve slide valve sleeve and spool with a small gap (less than 0.008mm), are generally single assembly, mechanical impurities into or too little lubricant, it is easy to get stuck. Hold into the treatment methods available wire from the head holes to make it boun ce. The fundamental solution To remove the single coil solenoid valve, remove the spool and spool cover, with CCI4 cleaning, making the spool in the valve kit flexible movement. Demolition should pay attention to the various components of the assembly sequence and the external wiring position for re-assembly and wiring is correct, also check the oil mist injector holes are blocked, adequacy of lubricants. (4) leak. Cause leakage air pressure, making a forced valve opening and closing difficult, because the sealing gasket is damaged or slide valve wear caused by several cavity channeling gas. The failure of the solenoid valve switch system, select the appropriate time, the flange solenoid valve  in the loss of electricity for processing, in a never-ending within the gap is a switch will switch the system to pause, and calmly.

Thermal vacuum testing of the solenoid valve of a Model

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Introduction factory completion of a type solenoid valve thermal vacuum testing in the testing process should be tested single coil solenoid valve response character istics of the traditional volume of test equipment can not meet the transport needs and therefore need to be equipped with portable flange solenoid valve  test equipment. CompactPCI referred to as CPCI, Chinese, also known as Compact PCI PICMG Association in 1994 to a bus interface standard. It s dense rugged VME excellent cooling effect of packaging and large-scale equipment and PC cheap, easy to use the processing capacity of the chip together, both to ensure high reliability of 99.999%, greatly reducing the cost of hardware and software development . Its compact body, securely installed, and adapt to various transport conditions, and high reliability. Each functional board with the modular structure of the CPCI bus, the plug is very safe and convenient, particularly suitable for a variety of models of this system test objects and a variety of requirements of the test conditions.