An electromagnetic pulse valve with a manually lockable sealing surface

Abstract

The application provides an electromagnetic pulse valve with a manually lockable sealing surface, comprising a valve body, a large valve cover and a large diaphragm assembly installed on the valve body, and further comprising a valve rod and a blocking piece arranged on the large valve cover; the large valve cover is provided with a valve rod mounting hole, one end of the valve rod mounting hole is in communication with the cavity, and the other end is in communication with the outside; the valve rod is movably installed in the valve rod mounting hole in an axial direction, the length of the valve rod is greater than the maximum distance between the one end of the valve rod mounting hole and the large diaphragm assembly, the valve rod is in sealing cooperation with the valve rod mounting hole, and the blocking piece is installed at the other end of the valve rod mounting hole and is in sealing cooperation with the other end of the valve rod mounting hole. Because the length of the valve rod is greater than the maximum distance between the one end of the valve rod mounting hole and the large diaphragm assembly, the valve rod can press against the large diaphragm assembly, so that the large diaphragm assembly is attached to the large sealing seat to form a seal, and thus the maintenance personnel can find the electromagnetic pulse valve with problems without disassembling and checking the electromagnetic pulse valves one by one.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulse valve, in particular to an electromagnetic pulse valve with manually locked sealing surface. BACKGROUND

[0002] The pulse valve is a special valve for bag-type dust collector, which is originally a diaphragm valve. It is called electromagnetic pulse valve because its actuator is a solenoid pilot driven type. The pulse valve is divided into submerged type, right angle type, right angle flange type, straight-through type and right angle nut type according to structure. Among them, the right angle nut type pulse valve is easy to install, which uses nut to tighten and compress the sealing ring, so that the sealing ring is sealed with the connected pipeline, and is widely used in pulse bag-type dust collector.

[0003] Figure 3 is a structural diagram of a conventional electromagnetic pulse valve.

[0004] As shown in Figure 3 , the conventional electromagnetic pulse valve mainly includes a pilot pipe assembly 1', a coil assembly 2', a small valve cover 3', a small spring 4', a small diaphragm assembly 5', a large valve cover 6', a large spring 7', a large diaphragm assembly 8', and a valve body 9'. The pilot pipe assembly 1' is connected to the small valve cover 3' by a screw, the coil assembly 2' is installed on the pilot pipe assembly 1' by a snap spring, the small valve cover 3' and the small diaphragm assembly 5' are connected to the large valve cover 6' by a screw, the small spring 4' is arranged between the inner wall of the small valve cover 3' and the small diaphragm assembly 5', the large valve cover 6' and the large diaphragm assembly 8' are connected to the valve body 9' by a screw, and the large spring 7' is arranged between the inner wall of the large valve cover 6' and the large diaphragm assembly 8'.

[0005] The throttle holes on the small diaphragm assembly 5' and the large diaphragm assembly 8' are used to balance the pressure to form a seal. Compressed gas can pass through the throttle holes to the cavity above each diaphragm assembly. Due to the difference in pressure area, a pressure difference is caused, which makes the sealing surface of the small diaphragm assembly 5' tightly press against the small sealing seat inside the large valve cover 6', and the sealing surface of the large diaphragm assembly 8' tightly press against the large sealing seat inside the valve body 9', thereby forming a seal.

[0006] When the electromagnetic pulse valve needs to be opened, the winding coil of the coil assembly 2' is energized by the electric signal of the pulse controller to generate a magnetic field force, the magnetic force overcomes the gas pressure, spring force and weight of the moving core of the pilot pipe assembly 1', and the moving core is attracted, and the small diaphragm assembly 5' moves upward. At this time, the gas discharge hole on the large valve cover 6' is in communication with the rear air chamber above the large diaphragm assembly 8', and the gas in the rear air chamber is quickly discharged. Since the air supply speed of the throttle hole on the large diaphragm assembly 8' is lower than the air discharge speed of the gas discharge hole, the pressure of the rear air chamber is quickly lost, the large diaphragm assembly 8' is pushed upward by the gas pressure in the gas supply gas pocket, the channel at the large sealing seat in the valve body 9' is opened, and the electromagnetic pulse valve is also opened. The compressed gas in the gas supply gas pocket can be sprayed from the outlet end of the valve body 9', forming an instantaneous jet.

[0007] When the electromagnetic pulse valve needs to be closed, the winding coil of the coil assembly 2' is de-energized by the electric signal of the pulse controller, and the magnetic field force disappears. The moving core of the pilot pipe assembly 1' is reset under the action of the small spring 4', and the small diaphragm assembly 5' is also reset and separates the communication between the gas discharge hole and the rear air chamber. At this time, the compressed gas in the gas supply gas pocket enters the rear air chamber through the throttle hole on the large diaphragm assembly 8', the pressure of the rear air chamber is restored, the large diaphragm assembly 8' is reset under the action of the large spring 7', the channel at the large sealing seat in the valve body 9' is closed, and the electromagnetic pulse valve is also closed.

[0008] Since the electromagnetic pulse valve is installed on the gas supply gas pocket with compressed gas, and usually multiple electromagnetic pulse valves are installed on one gas supply gas pocket. After the electromagnetic pulse valve is installed, the gas supply gas pocket usually needs to be tested for pressure. If any of the electromagnetic pulse valves is not installed properly or the large diaphragm assembly 8' has impurities adsorbed thereon, the large diaphragm assembly 8' cannot be sealed with the large sealing seat in the valve body 9', thereby causing the electromagnetic pulse valve to leak. In addition, when the gas supply gas pocket cannot reach the designed initial pressure due to slow gas inlet, the electromagnetic pulse valve will also leak. The leakage of the electromagnetic pulse valve will prevent the gas supply gas pocket from establishing the initial pressure, thereby preventing the pressure test. Moreover, since multiple electromagnetic pulse valves are installed on the gas supply gas pocket, it is difficult for maintenance personnel to accurately determine which electromagnetic pulse valve has a problem, and only one can be removed and checked, thereby having limitations. SUMMARY

[0009] The present application is to solve the above problems, and aims to provide a manually locked sealing surface electromagnetic pulse valve.

[0010] The application provides a manually lockable electromagnetic pulse valve with a sealing surface, which has the characteristics that the valve body is provided with a large valve cover and a large diaphragm assembly, and a large sealing seat is arranged in the valve body for forming a seal with the large diaphragm assembly; the large valve cover has a cavity for forming a rear air chamber; a valve rod and a blocking piece are arranged on the large valve cover; a valve rod mounting hole is arranged on the large valve cover, one end of the valve rod mounting hole is communicated with the cavity and corresponds to the center of the large diaphragm assembly, and the other end is communicated with the outside; the valve rod is movably arranged in the valve rod mounting hole in an axial direction, the length of the valve rod is greater than the maximum distance between the one end of the valve rod mounting hole and the large diaphragm assembly, so that the valve rod is used for pressing the large diaphragm assembly to form a seal between the large diaphragm assembly and the large sealing seat, and the valve rod is in sealing fit with the valve rod mounting hole; and the blocking piece is arranged in the other end of the valve rod mounting hole and is in sealing fit with the other end of the valve rod mounting hole.

[0011] In the manually lockable electromagnetic pulse valve provided by the application, the valve rod mounting hole has a large-diameter section and a small-diameter section which are communicated with each other, the other end of the large-diameter section is communicated with the outside, and the one end of the small-diameter section is communicated with the cavity and corresponds to the center of the large diaphragm assembly; the valve rod comprises a limiting portion and a pressing portion, the limiting portion is arranged in the large-diameter section, the diameter of the limiting portion is greater than that of the small-diameter section, the limiting portion is in sealing fit with the large-diameter section, the pressing portion is arranged in the small-diameter section, the length of the pressing portion is greater than or equal to the maximum distance between the other end of the small-diameter section and the large diaphragm assembly, and the pressing portion is in sealing fit with the small-diameter section.

[0012] Further, the limiting portion is in a cylindrical shape, at least one first groove is arranged on the side wall of the limiting portion in a circumferential direction, and a first sealing member is arranged in the first groove along the circumferential direction of the limiting portion.

[0013] Further, a second groove is arranged on the one end of the limiting portion which faces the outside, and the second groove is used for facilitating the rotation of the valve rod.

[0014] Further, the pressing portion is in a rod shape, an outer thread and an inner thread which are engaged with each other are respectively arranged on the outer wall of the pressing portion and the inner wall of the small-diameter section, and a second sealing member is arranged between the outer thread and the inner thread.

[0015] In the manually lockable electromagnetic pulse valve provided by the application, the outer side of the blocking piece is sleeved with a third sealing member, and the diameter of the blocking piece after being sleeved with the third sealing member is greater than or equal to the diameter of the large-diameter section.

[0016] In the manually lockable electromagnetic pulse valve provided by the application, a handle is arranged on the one end of the blocking piece which faces the outside.

[0017] Effects of the application

[0018] Compared with the prior art, the electromagnetic pulse valve with a manually lockable sealing surface according to the present application is provided with a valve rod and a blocking piece on the large valve cover, and when the blocking piece is removed, the valve rod is moved along the valve rod mounting hole formed in the large valve cover towards the large diaphragm assembly in the valve body by rotating the valve rod from the outside. Because the length of the valve rod is greater than the maximum distance between the one end of the valve rod mounting hole and the large diaphragm assembly, the valve rod can press against the large diaphragm assembly, so that the large diaphragm assembly is tightly attached to the large sealing seat in the valve body, forming a seal, so that the electromagnetic pulse valve is closed. Therefore, when the gas supply gas tank cannot be tested for pressure, the maintenance personnel can close the electromagnetic pulse valve installed on the gas supply gas tank by the above operation, and then check whether the problem is that the gas supply gas tank has slow gas inlet. If not, the maintenance personnel opens the electromagnetic pulse valve one by one, so as to determine which electromagnetic pulse valve has a problem and causes the gas supply gas tank to be unable to be tested for pressure. The maintenance personnel does not need to remove and check the electromagnetic pulse valve one by one, thereby saving the time and labor spent on maintenance, and improving the efficiency of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of an electromagnetic pulse valve in an embodiment of the present application;

[0020] Figure 2 is Figure 1 is a partial enlarged view of A in

[0021] Figure 3 is a structural schematic diagram of a conventional electromagnetic pulse valve.

[0022] 1, valve body; 11, large sealing seat; 2, large valve cover; 21, valve rod mounting hole; 211, large diameter section; 212, small diameter section; 22, cavity; 23, gas discharge hole; 3, valve rod; 31, limiting portion; 311, first groove; 312, first sealing piece; 313, second groove; 32, pressing portion; 321, second sealing piece; 4, blocking piece; 41, handle; 5, small diaphragm assembly; 6, large diaphragm assembly; 61, throttling hole; 7, large spring; 1', pilot assembly; 2', coil assembly; 3', small valve cover; 4', small spring; 5', small diaphragm assembly; 6', large valve cover; 7', large spring; 8', large diaphragm assembly; 9', valve body. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following embodiments will be specifically described in conjunction with the drawings.

[0024] EMBODIMENT

[0025] Figure 1 is a structural schematic diagram of an electromagnetic pulse valve in an embodiment of the present application.

[0026] As Figure 1 shown, the present embodiment provides a manually lockable sealing surface electromagnetic pulse valve, the basic structure of which is the same as that of a conventional electromagnetic pulse valve, the main difference being the large valve cover 2 and the valve stem 3 and the blocking piece 4 arranged on the large valve cover 2, so the structure, position and connection relationship of other parts are not described in detail.

[0027] Figure 2 is Figure 1 a local enlarged view of A in FIG. 1.

[0028] As Figure 1 shown, the large valve cover 2 and the large diaphragm assembly 6 are arranged on the valve body 1, and the valve body 1 is provided with a large sealing seat 11 for cooperating with the large diaphragm assembly 6 to form a seal. The large valve cover 2 has a cavity 22 for constituting a rear air chamber, a gas release hole 23 communicating with the outside, and a small sealing seat for cooperating with the small diaphragm assembly 5 to form a seal. This part of the structure is the same as that of the valve body 1 and the large valve cover 2 in the conventional electromagnetic pulse valve. The difference is that, as Figure 2 shown, the large valve cover 2 is provided with a valve stem 3 mounting hole 21, one end of which communicates with the cavity 22 and corresponds to the center of the large diaphragm assembly 6, and the other end communicates with the outside. Specifically, the valve stem 3 mounting hole 21 has a large diameter section 211 and a small diameter section 212 in communication with each other, the other end of the large diameter section 211 communicates with the outside, and one end of the small diameter section 212 communicates with the cavity 22 and corresponds to the center of the large diaphragm assembly 6. The valve stem 3 mounting hole 21 is designed as a stepped hole, which can limit the position of the valve stem 3 when it is not needed, thereby preventing the valve stem 3 from falling automatically and affecting the operation of the electromagnetic pulse valve, and improving the stability of the electromagnetic pulse valve during operation. Moreover, the small diameter end corresponds to the center of the large diaphragm assembly 6, which can ensure that the valve stem 3 is just pressed against the center of the large diaphragm assembly 6, and ensure that the large diaphragm assembly 6 and the large sealing seat 11 form a perfect seal. In the present embodiment, the valve stem 3 mounting hole 21 is arranged along the axial direction of the large valve cover 2.

[0029] As Figure 2 shown, the valve stem 3 is axially movably installed in the valve stem 3 mounting hole 21, mainly including a limiting portion 31 and a pressing portion 32, the limiting portion 31 is located in the large diameter section 211, the diameter of the limiting portion 31 is greater than that of the small diameter section 212, and the limiting portion 31 is in sealing cooperation with the large diameter section 211, the pressing portion 32 is located in the small diameter section 212, the length of the pressing portion 32 is greater than or equal to the maximum distance between the other end of the small diameter section 212 and the large diaphragm assembly 6, thereby being used to press the large diaphragm assembly 6 to form a seal between the large diaphragm assembly 6 and the large sealing seat 11, and the pressing portion 32 is in sealing cooperation with the small diameter section 212. Among them, the limiting portion 31 and the pressing portion 32 can be an integral structure, or a split structure. Because the diameter of the limiting portion 31 is greater than that of the small diameter section 212, the limiting portion 31 can cooperate with the small diameter section 212 to prevent the valve stem 3 from falling automatically.

[0030] In this embodiment, the limiting part 31 is cylindrical, and the pressing part 32 is rod-shaped. To ensure a seal between the limiting part 31 and the large-diameter section 211, at least one first groove 311 is provided circumferentially on the side wall of the limiting part 31. A first sealing element 312 is provided within the first groove 311 along the circumference of the limiting part 31, thereby ensuring a seal between the limiting part 31 and the large-diameter section 211. It is conceivable that the sealing structure of the groove and the first sealing element 312 can also be achieved by fitting the first sealing element 312 onto the side wall of the limiting part 31 or other similar structures that can ensure a sealing effect. Furthermore, to ensure a seal between the pressing part 32 and the small-diameter section 212, the outer wall of the pressing part 32 and the inner wall of the small-diameter section 212 are respectively provided with engaging external threads and internal threads, and a second sealing element 321 is provided between the external threads and the internal threads. The first sealing element 312 and the second sealing element 321 can be sealing elements such as felt sealing rings, rubber sealing rings, flange gasket sealing rings, and sealing lips. In this embodiment, the first seal 312 and the second seal 321 are preferably rubber sealing rings.

[0031] In this embodiment, a second groove 313 is provided on the end of the limiting part 31 facing outward to facilitate the rotation of the pressing part 32. The shape of the second groove 313 is preferably a regular polygon, so as to facilitate the maintenance personnel to rotate the pressing part 32 using a specific tool, such as an inside corner wrench.

[0032] like Figure 2 As shown, the sealing element 4 is installed at the other end of the valve stem 3 mounting hole 21 and is sealed to the other end of the valve stem 3 mounting hole 21. To ensure a seal between the sealing element 4 and the large-diameter section 211, the side wall of the sealing element 4 and the inner wall of the valve stem 3 mounting hole 21 are respectively provided with meshing external threads and internal threads, and a third sealing element is provided between the external threads and the internal threads. In this embodiment, the third sealing element is preferably a rubber sealing ring.

[0033] In this embodiment, the end of the sealing component 4 facing outward is provided with a handle 41, which facilitates maintenance personnel to manually install or remove the sealing component 4.

[0034] When the gas supply gas pocket cannot be tested, the maintenance personnel first operate one of the electromagnetic pulse valves, i.e. remove the blocking member 4 by the hand 41, and then use a special tool to clamp it in the second groove 313 of the limiting portion 31, and then move the limiting portion 31 and the pressing portion 32 of the valve rod 3 along the valve rod 3 mounting hole 21 by rotating the valve rod 3, until the pressing portion 32 presses on the large diaphragm assembly 6 to seal the large diaphragm assembly 6 and the large sealing seat 11. Then, the maintenance personnel operate the above operation on the multiple electromagnetic pulse valves on the gas supply gas pocket, until the large diaphragm assembly 6 in each electromagnetic pulse valve is sealed with the large sealing seat 11. At this time, the maintenance personnel check whether the gas supply gas pocket cannot be tested due to slow gas inlet.

[0035] If it is not the reason, the maintenance personnel still first operate one of the electromagnetic pulse valves, i.e. use a special tool to control the pressing portion 32 to rotate in the opposite direction, until the limiting portion 31 and the pressing portion 32 of the valve rod 3 are located in the valve rod 3 mounting hole 21 again. Then, the pressure test is performed again, and whether the electromagnetic pulse valve has a problem is judged according to whether the pressure test can be performed. Then, the maintenance personnel can check whether the multiple electromagnetic pulse valves on the gas supply gas pocket have problems by the above operation. Finally, the maintenance personnel repair the electromagnetic pulse valve with problems. When the inspection and repair are completed, the maintenance personnel reinstall the blocking member 4 on the large valve cover 2.

[0036] In this way, when the gas supply gas pocket cannot be tested, the maintenance personnel do not need to remove and check the multiple electromagnetic pulse valves on the gas supply gas pocket one by one, but can find the electromagnetic pulse valve with problems, thereby saving the time and manpower spent in maintenance, and improving the efficiency of maintenance.

[0037] Effects of the embodiment

[0038] According to the electromagnetic pulse valve of the present embodiment, when the plugging piece is removed, the valve rod is moved along the valve rod mounting hole of the large valve cover to the large diaphragm assembly in the valve body by rotating the valve rod from the outside. Because the length of the valve rod is greater than the maximum distance between the one end of the valve rod mounting hole and the large diaphragm assembly, the valve rod can press the large diaphragm assembly, so that the large diaphragm assembly is tightly attached to the large sealing seat in the valve body to form a seal, thereby closing the electromagnetic pulse valve. Therefore, when the gas supply gas tank cannot be tested, the maintenance personnel can close the electromagnetic pulse valve installed on the gas supply gas tank, and then check whether the problem is caused by slow gas supply. If not, the maintenance personnel can open the electromagnetic pulse valve one by one to determine which electromagnetic pulse valve is the problem, so that the maintenance personnel do not need to remove and check the electromagnetic pulse valve one by one, thereby saving time and labor for maintenance, and improving the efficiency of maintenance.

[0039] Further, because the valve rod mounting hole is designed as a stepped hole, the position of the valve rod can be limited when the valve rod is not in use, thereby preventing the valve rod from falling automatically and affecting the operation of the electromagnetic pulse valve, and improving the stability of the electromagnetic pulse valve during operation. Moreover, the small diameter end corresponds to the center of the large diaphragm assembly, which can ensure that the valve rod is pressed against the center of the large diaphragm assembly, and ensure that the large diaphragm assembly and the large sealing seat form a perfect seal. In the present embodiment, the valve rod mounting hole is arranged along the axial direction of the large valve cover.

[0040] Further, because the limiting portion has a diameter greater than that of the small diameter section, the limiting portion can cooperate with the small diameter section to prevent the valve rod from falling automatically.

[0041] Further, because the valve rod and the plugging piece are in sealing cooperation with the inner wall of the valve rod mounting hole, the air tightness of the electromagnetic pulse valve is ensured, and the stability of the electromagnetic pulse valve during operation is improved.

[0042] Further, because the limiting portion has a diameter greater than that of the small diameter section, the limiting portion can cooperate with the small diameter section to prevent the valve rod from falling automatically.

[0043] Further, because the plugging piece is provided with a handle at the end facing the outside, it is convenient for the maintenance personnel to manually install or remove the plugging piece.

[0044] The above embodiments are preferred cases of the present application and do not limit the protection scope of the present application.

Claims

1. A manually lockable electromagnetic pulse valve, installed on an air supply manifold, comprising a valve body, a large valve cover and a large diaphragm assembly mounted on the valve body, a large spring disposed between the large valve cover and the large diaphragm assembly, a large sealing seat provided within the valve body for forming a seal with the large diaphragm assembly, and the large valve cover having a cavity for forming a rear air chamber, characterized in that, Also includes: Valve stem and sealing element provided on the large valve cover; The large valve cover is provided with a valve stem mounting hole, which has a large diameter section and a small diameter section that are connected end to end. One end of the small diameter section is connected to the cavity and corresponds to the center of the large diaphragm assembly, while the other end of the large diameter section is connected to the outside. The valve stem is axially movable and installed in the valve stem mounting hole. The length of the valve stem is greater than the maximum distance between one end of the valve stem mounting hole and the large diaphragm assembly, so as to press against the large diaphragm assembly, so that the large diaphragm assembly and the large sealing seat form a seal, and the valve stem and the valve stem mounting hole are sealed together. The sealing element is detachably installed at the other end of the valve stem mounting hole via threads, and provides a sealing fit with the other end of the valve stem mounting hole. The valve stem includes a limiting part and a pressing part. The limiting part is located within the large-diameter section, and the diameter of the limiting part is larger than the diameter of the small-diameter section. The limiting part is in a sealing fit with the large-diameter section. The pressure-retaining portion is located within the small-diameter section, and the length of the pressure-retaining portion is greater than or equal to the maximum distance between the other end of the small-diameter section and the large diaphragm assembly. The pressure-retaining portion is in a sealing fit with the small-diameter section. The valve stem has a second groove on the end facing outward to facilitate rotation of the pressure part.

2. The electromagnetic pulse valve with manually lockable sealing surface according to claim 1, characterized in that: in, The limiting part is cylindrical, and at least one first groove is formed circumferentially on the side wall of the limiting part. A first sealing element is provided in the first groove along the circumference of the limiting portion.

3. The electromagnetic pulse valve with manually lockable sealing surface according to claim 1, characterized in that: in, The pressing part is rod-shaped, and its outer wall and the inner wall of the small-diameter section are respectively provided with engaging external and internal threads. A second seal is provided between the external thread and the internal thread.

4. The electromagnetic pulse valve with manually lockable sealing surface according to claim 1, characterized in that: in, A third sealing element is fitted on the outer side of the sealing element, and the diameter of the sealing element after the third sealing element is fitted is greater than or equal to the diameter of the large diameter section.

5. The electromagnetic pulse valve with manually lockable sealing surface according to claim 1, characterized in that: in, The sealing element has a handle on the end facing outwards.

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