High-frequency explosion-proof electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, and discloses a high-frequency anti-explosion electromagnetic valve which comprises a valve body, a valve body inner hole is formed in the valve body in a penetrating mode and movably connected with a valve rod, the outer wall of one side of the valve body is connected with a valve body rear cover through a rear cover screw, and the outer wall of the side, away from the valve body rear cover, of the valve body is connected with a pilot seat through a pilot seat screw. The silencer sealing ring serves as a sealing element between the silencer and the pilot head assembly, the silencer sealing ring is designed to be tightly attached to two contact faces, external moisture is effectively prevented from entering the silencer and the pilot head assembly through gaps, the sealing gasket serves as a physical barrier between the pilot head assembly and the pilot seat, the sealing gasket can effectively isolate moisture in the external environment, and the service life of the silencer is prolonged. The wiring support sealing ring is tightly matched with the installation groove, sealing protection on the connecting position of the explosion-proof shell and the wiring support is formed, water is prevented from entering the coil from the wiring position through the design, and therefore the risk that the coil is burnt out due to short circuit is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, and specifically, to high-frequency explosion-proof solenoid valves. Background Art

[0002] An explosion-proof solenoid valve is a widely used control component, which is widely used in fields such as petroleum, chemical industry, metallurgy, aviation, and aerospace. Its main function is to control the flow of media such as gas, liquid, and steam, and play roles of switching, regulating, distributing, and safety protection. The explosion-proof solenoid valve mainly consists of an explosion-proof shell, a pilot head assembly, a wiring bracket, wiring terminals, a pilot seat, a valve body, a rear cover, a muffler, and a sealing ring. It is mainly used in flammable and explosive environments. Its main function is to isolate the sparks and electric arcs generated during the coil discharge in the explosion-proof shell, prevent them from contacting the external environment, and avoid combustion and explosion.

[0003] There are some drawbacks in the existing devices during use. For example, the existing explosion-proof solenoid valves have the following disadvantages: when used in an outdoor open environment and encountering rainy days, water easily accumulates in the explosion-proof shell, and the accumulated water seeps into the coil, resulting in coil short-circuit and burnout. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-frequency explosion-proof solenoid valve to solve the problem that when the existing explosion-proof solenoid valve encounters rainy days, the accumulated water seeps into the coil and causes the coil to short-circuit and burn out.

[0005] The present utility model provides the following technical solution: a high-frequency explosion-proof solenoid valve, including a valve body, a valve body inner hole is penetratingly opened on the valve body, a valve rod is movably connected in the valve body inner hole, a valve body rear cover is connected to one outer wall of the valve body by a rear cover screw, a pilot seat is connected to the outer wall of the valve body away from the valve body rear cover by a pilot seat screw, a manual rod is slidably connected to the outer wall of the pilot seat away from the valve body, an explosion-proof housing is connected to the upper end surface of the pilot seat by an explosion-proof housing screw, a coil, a pilot head assembly and a wiring bracket are fixedly connected inside the explosion-proof housing, a silencer is fixedly connected to the top of the pilot head assembly, the coil is electrically connected to the wiring bracket, a grounding plate is connected to one outer wall of the explosion-proof housing by a grounding screw, a cable interface is opened on the outer wall of the explosion-proof housing near the grounding plate, a cover is fixedly connected to one outer wall of the explosion-proof housing, a piston cavity is opened on the outer wall of the pilot seat near the valve body, a piston is slidably connected inside the piston cavity, and the piston is fixedly sleeved on the outside of the valve rod. A first air guide hole is opened on the outer wall of the pilot seat near the valve body corresponding to the outside of the piston cavity. Two second air guide holes are opened on the inner side wall of the piston cavity, and the two second air guide holes are symmetrically arranged. A stepped hole for connecting the pilot head assembly is opened on the upper end surface of the pilot seat. A third air guide hole is opened on the bottom wall of the stepped hole, and the third air guide hole is communicated with the first air guide hole. Fourth air guide holes are opened on both sides of the bottom wall of the stepped hole, and the two fourth air guide holes are respectively communicated with the corresponding second air guide holes.

[0006] In the above solution, after the coil is powered on, an electromagnetic field is quickly generated, enabling the pilot head assembly to start working rapidly. This rapid response ability ensures that the valve can quickly adjust its opening and closing state to meet the rapid change requirements of the fluid flow rate in the system. By precisely controlling parameters such as the current intensity and frequency of the coil, fine adjustment of the output pressure or flow rate of the pilot head assembly can be achieved, thereby realizing precise control of the valve opening and fluid flow rate.

[0007] As a preference of the above technical solution, a silencer sealing ring is fixedly connected between the bottom end of the silencer and the top end of the pilot head assembly.

[0008] In the above solution, the sealing ring can effectively prevent external moisture from entering the inside of the silencer and the pilot head assembly, keeping the inside of the silencer and the pilot head assembly dry.

[0009] As a preference of the above technical solution, a gasket is fixedly connected between the lower end surface of the pilot head assembly and the upper end surface of the pilot seat.

[0010] In the above solution, the gasket can effectively prevent moisture in the external environment from seeping into the system through the gap between the contact surfaces of the pilot head assembly and the pilot seat, ensuring a dry environment inside the system.

[0011] As an optimization of the above technical solution, an installation groove is annularly formed on the outer wall of one side of the wiring bracket close to the explosion-proof housing, and a wiring bracket sealing ring is fixedly connected to the inner side of the installation groove.

[0012] In the above solution, the design of the wiring bracket sealing ring makes it difficult for moisture to penetrate from the wiring part, thereby protecting the coil located inside the explosion-proof housing from moisture. This helps to extend the service life of the coil and reduce potential safety hazards such as short circuits and electric leakage caused by moisture.

[0013] As an optimization of the above technical solution, a manual rod fixing pin for fixing the manual rod is slidably connected to the upper end surface of the pilot seat.

[0014] In the above solution, the structure of the manual rod fixing pin has been modified. It has been changed from the original cylindrical pin to a stepped fixing pin, which reduces the installation difficulty and eliminates the need for applying glue. This stable connection helps to prevent the manual rod from loosening or falling off under external forces, thus ensuring the overall structural stability of the valve.

[0015] As an optimization of the above technical solution, a first air inlet hole is formed on the outer wall of one side of the valve body, a second air inlet hole is formed on the upper end surface of the valve body, a plug is slidably connected to the inner side of the second air inlet hole, two air outlet holes are symmetrically formed on the lower end surface of the valve body, and two exhaust holes are symmetrically formed on the outer wall of the valve body far from the first air inlet hole.

[0016] In the above solution, when it is necessary to switch from one working mode to another, such as from a four-way mode to a two-way three-way mode, only one air outlet hole and one exhaust hole need to be blocked to quickly complete the conversion. This conversion process is simple and fast, without the need for complex mechanical adjustments or component replacements.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] In the present utility model, the designs of the muffler sealing ring, the gasket, and the wiring bracket sealing ring jointly solve the problem of water accumulation that is likely to occur when the explosion-proof solenoid valve is used in an outdoor open environment. By enhancing the sealing performance, they effectively prevent the intrusion of external moisture and protect the internal key components (such as coils, pilot head assemblies, etc.) from damage. This not only extends the service life of the equipment but also improves the stability and reliability of the system, reducing the failure rate and maintenance cost caused by moisture intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the high-frequency explosion-proof solenoid valve;

[0020] Figure 2 is a schematic diagram of the valve body structure in the high-frequency explosion-proof solenoid valve;

[0021] Figure 3 Schematic diagram of the pilot seat structure in a high-frequency explosion-proof solenoid valve;

[0022] Figure 4 Partial structure schematic diagram of a high-frequency explosion-proof solenoid valve;

[0023] Figure 5 First explosion structure schematic diagram of a high-frequency explosion-proof solenoid valve;

[0024] Figure 6 Second explosion structure schematic diagram of a high-frequency explosion-proof solenoid valve.

[0025] In the figure: 1. Valve body; 2. Pilot seat; 3. Rear cover of the valve body; 4. Valve stem; 5. Piston; 6. Flameproof enclosure; 7. Cover; 8. Gasket; 9. Wiring bracket; 10. Muffler; 11. Manual lever; 12. Manual lever fixing pin; 13. Pilot head assembly; 14. Coil; 15. Plug; 16. Pilot seat screw; 17. Rear cover screw; 18. Grounding screw; 19. Flameproof enclosure screw; 20. Grounding plate; 21. Muffler sealing ring; 22. Wiring bracket sealing ring; 23. First air inlet hole; 24. Second air inlet hole; 25. Exhaust hole; 26. Air outlet hole; 27. Inner hole of the valve body; 28. Cable interface; 29. Piston cavity; 30. First air guide hole; 31. Second air guide hole; 32. Step hole; 33. Third air guide hole; 34. Fourth air guide hole; 35. Installation groove. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Embodiment

[0028] As Figures 1 - 6As shown in the figure, the utility model provides a technical solution: a high-frequency explosion-proof solenoid valve, which includes a valve body 1. A valve body inner hole 27 is penetrated and opened on the valve body 1. A valve stem 4 is movably connected to the valve body inner hole 27. A valve body rear cover 3 is connected to one outer wall of the valve body 1 through a rear cover screw 17. A pilot seat 2 is connected to the outer wall of the valve body 1 far from the valve body rear cover 3 through a pilot seat screw 16. A manual rod 11 is slidably connected to the outer wall of the pilot seat 2 far from the valve body 1. A flameproof enclosure 6 is connected to the upper end surface of the pilot seat 2 through a flameproof enclosure screw 19. A coil 14, a pilot head assembly 13 and a wiring bracket 9 are fixedly connected inside the flameproof enclosure 6. A muffler 10 is fixedly connected to the top of the pilot head assembly 13. The coil 14 is electrically connected to the wiring bracket 9. A grounding plate 20 is connected to one outer wall of the flameproof enclosure 6 through a grounding screw 18. A cable interface 28 is opened on the outer wall of the flameproof enclosure 6 close to the grounding plate 20. A cover 7 is fixedly connected to one outer wall of the flameproof enclosure 6. A piston cavity 29 is opened on the outer wall of the pilot seat 2 close to the valve body 1. A piston 5 is slidably connected to the inner side of the piston cavity 29, and the piston 5 is fixedly sleeved on the outer side of the valve stem 4. A first air guide hole 30 is opened on the outer wall of the pilot seat 2 close to the valve body 1 corresponding to the outside of the piston cavity 29. Two second air guide holes 31 are opened on the inner side wall of the piston cavity 29, and the two second air guide holes 31 are symmetrically arranged. A step hole 32 for connecting the pilot head assembly 13 is opened on the upper end surface of the pilot seat 2. A third air guide hole 33 is opened on the bottom wall of the step hole 32. The third air guide hole 33 is communicated with the first air guide hole 30. Fourth air guide holes 34 are opened on both sides of the bottom wall of the step hole 32. The two fourth air guide holes 34 are respectively communicated with the corresponding second air guide holes 31. During the specific use process, the cable interface 28 facilitates the on-site installation and maintenance personnel to quickly and accurately connect the cables. The coil 14 is energized to generate an electromagnetic field, and the electromagnetic field acts on the pilot head assembly 13 to make it start to work. The pilot head assembly 13 supplies a medium such as gas or liquid to the first air guide hole 30 through the third air guide hole 33. The pressure change in the first air guide hole 30 pushes the piston 5 to move in the piston cavity 29, and then drives the valve stem 4 to move in the valve body inner hole 27, and finally changes the opening and closing state of the valve to allow or prevent the fluid from passing through. When needed, the pilot head assembly 13 also supplies a medium such as gas or liquid to the second air guide hole 31 through the fourth air guide hole 34. The supply of the medium such as gas or liquid in this path can achieve multiple purposes, such as adjusting the pressure balance in the piston cavity 29, changing the fluid flow direction, improving the flexibility of fluid control, etc. Through two independent air guide hole paths, the solenoid valve can more flexibly control parameters such as the fluid flow path, flow rate and pressure. A strict sealing design is adopted between the cover 7 and the flameproof enclosure 6 to ensure the complete isolation of the internal space from the external environment. The manual rod 11, as a backup means, provides a direct manual operation method, which can quickly change the opening and closing state of the valve, ensure the stable operation of the system and prevent accidents from occurring.

[0029] As an implementation method in this embodiment, such asFigure 6 As shown in the figure, a muffler seal ring 21 is fixedly connected between the bottom end of the muffler 10 and the top end of the pilot head assembly 13. During the specific use process, the muffler seal ring 21 serves as a sealing element between the muffler 10 and the pilot head assembly 13. Its design can closely fit the two contact surfaces, effectively preventing external moisture from entering the interiors of the muffler 10 and the pilot head assembly 13 through the gap between the muffler 10 and the pilot head assembly 13.

[0030] As an implementation manner in this embodiment, as Figure 6 shown, a gasket 8 is fixedly connected between the lower end face of the pilot head assembly 13 and the upper end face of the pilot seat 2. During the specific use process, the gasket 8 serves as a physical barrier between the pilot head assembly 13 and the pilot seat 2, and can effectively isolate moisture in the external environment, preventing moisture from seeping into the system interior through the gap between the contact surfaces of the pilot head assembly 13 and the pilot seat 2.

[0031] As an implementation manner in this embodiment, as Figure 6 shown, an installation groove 35 is annularly formed on the outer wall of one side of the wiring bracket 9 close to the explosion-proof enclosure 6. A wiring bracket seal ring 22 is fixedly connected to the inner side of the installation groove 35. During the specific use process, the close fit between the wiring bracket seal ring 22 and the installation groove 35 forms a sealing protection for the connection between the explosion-proof enclosure 6 and the wiring bracket 9. This design effectively prevents moisture from entering the coil 14 from the wiring point and burning out the coil 14.

[0032] As an implementation manner in this embodiment, as Figure 5 shown, a manual rod fixing pin 12 for fixing the manual rod 11 is slidably connected to the upper end face of the pilot seat 2. During the specific use process, the manual rod 11 is firmly fixed on the pilot seat 2 by using the manual rod fixing pin 12, ensuring that the fixing pin is fully inserted and locked to prevent the manual rod 11 from loosening or falling off during the operation process.

[0033] As an implementation manner in this embodiment, as Figure 1 、 Figure 2 and Figure 5As shown in the figure, a first air inlet hole 23 is provided on the outer wall of one side of the valve body 1, a second air inlet hole 24 is provided on the upper end face of the valve body 1, a plug 15 is slidably connected inside the second air inlet hole 24, two air outlet holes 26 are symmetrically provided on the lower end face of the valve body 1, and two exhaust holes 25 are symmetrically provided on the outer wall of the side of the valve body 1 away from the first air inlet hole 23. In the specific use process, the first air inlet hole 23, the second air inlet hole 24, the two air outlet holes 26 and the two exhaust holes 25 are simultaneously provided on the valve body 1, which provides the possibility of multiple working modes for the valve. By adjusting the opening and closing states of different hole positions, different use requirements can be flexibly met. The existence of the plug 15 enables the second air inlet hole 24 to be selectively opened or closed. When the plug 15 is installed and seals the second air inlet hole 24, the fluid can only enter the valve body 1 through the first air inlet hole 23, thereby restricting the fluid entry path. When it is necessary to switch from other working modes to the two-position three-way mode, only one air outlet hole 26 and one exhaust hole 25 need to be blocked to achieve a quick conversion, without replacing the entire valve or performing complex modifications.

[0034] Working principle: When the coil 14 is energized, an electromagnetic field will be generated. The electromagnetic field acts on the pilot head assembly 13, causing it to start working. The pilot head assembly 13 supplies a medium such as gas or liquid to the first air guide hole 30 through the third air guide hole 33. The pressure change in the first air guide hole 30 pushes the piston 5 to move in the piston chamber 29, and then drives the valve stem 4 to move in the valve body inner hole 27, finally changing the opening and closing state of the valve to allow or prevent fluid from passing through. When needed, the pilot head assembly 13 also supplies a medium such as gas or liquid to the second air guide hole 31 through the fourth air guide hole 34. The supply of the medium such as gas or liquid in this path can achieve various purposes, such as adjusting the pressure balance in the piston chamber 29, changing the fluid flow direction, improving the flexibility of fluid control, etc. The silencer sealing ring 21, as a sealing element between the silencer 10 and the pilot head assembly 13, is designed to closely fit the two contact surfaces, effectively preventing external moisture from entering the silencer 10 and the pilot head assembly 13 through the gaps. The gasket 8, as a physical barrier between the pilot head assembly 13 and the pilot seat 2, can effectively isolate the moisture in the external environment. The wiring bracket sealing ring 22 closely cooperates with the installation groove 35 to form a sealing protection for the connection between the explosion-proof housing 6 and the wiring bracket 9. This design avoids moisture from entering the coil 14 from the wiring, thus preventing the risk of the coil 14 being burned out due to short circuit. The manual lever fixing pin 12 firmly fixes the manual lever 11 on the pilot seat 2, ensuring that the fixing pin is fully inserted and locked. This step prevents the manual lever 11 from loosening or falling off during operation, ensuring the stability and reliability of manual operation. The valve body 1 is provided with a first air inlet hole 23, a second air inlet hole 24, two air outlet holes 26 and two exhaust holes 25 at the same time. This multi-hole design provides the possibility of multiple working modes for the valve. By adjusting the opening and closing states of different hole positions, different usage requirements can be flexibly met. The presence of the plug 15 enables the second air inlet hole 24 to be selectively opened or closed. By installing or removing the plug 15, the fluid inlet path can be controlled to achieve different fluid control strategies. When it is necessary to switch from other working modes to the two-way three-way mode, only one air outlet hole 26 and one exhaust hole 25 need to be blocked to achieve a quick conversion. This design simplifies the operation process and improves work efficiency.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. High-frequency explosion-proof solenoid valve, including a valve body (1), characterized in that: The valve body (1) is penetrated with a valve body inner hole (27), and a valve stem (4) is movably connected to the valve body inner hole (27). One outer wall of the valve body (1) is connected with a valve body rear cover (3) through a rear cover screw (17). One outer wall of the valve body (1) away from the valve body rear cover (3) is connected with a pilot seat (2) through a pilot seat screw (16). A manual rod (11) is slidably connected to one outer wall of the pilot seat (2) away from the valve body (1). The upper end surface of the pilot seat (2) is connected with an explosion-proof housing (6) through an explosion-proof housing screw (19). A coil (14), a pilot head assembly (13) and a wiring bracket (9) are fixedly connected inside the explosion-proof housing (6). A silencer (10) is fixedly connected to the top of the pilot head assembly (13). The coil (14) is electrically connected to the wiring bracket (9). One outer wall of the explosion-proof housing (6) is connected with a grounding plate (20) through a grounding screw (18). A cable interface (28) is opened on one outer wall of the explosion-proof housing (6) close to the grounding plate (20). A lid (7) is fixedly connected to one outer wall of the explosion-proof housing (6). A silencer seal ring (21) is fixedly connected between the bottom end of the silencer (10) and the top of the pilot head assembly (13). A gasket (8) is fixedly connected between the lower end surface of the pilot head assembly (13) and the upper end surface of the pilot seat (2). An installation groove (35) is annularly opened on one outer wall of the wiring bracket (9) close to the explosion-proof housing (6), and a wiring bracket seal ring (22) is fixedly connected to the inner side of the installation groove (35).

2. The high-frequency explosion-proof solenoid valve according to claim 1, wherein: A piston cavity (29) is opened on one outer wall of the pilot seat (2) close to the valve body (1). A piston (5) is slidably connected to the inner side of the piston cavity (29), and the piston (5) is fixedly sleeved on the outer side of the valve stem (4). A first air guide hole (30) is opened on one outer wall of the pilot seat (2) close to the valve body (1) corresponding to the outside of the piston cavity (29). Two second air guide holes (31) are opened on the inner side wall of the piston cavity (29), and the two second air guide holes (31) are symmetrically arranged. A stepped hole (32) for connecting the pilot head assembly (13) is opened on the upper end surface of the pilot seat (2). A third air guide hole (33) is opened on the bottom wall of the stepped hole (32), and the third air guide hole (33) is communicated with the first air guide hole (30). Fourth air guide holes (34) are opened on both sides of the bottom wall of the stepped hole (32), and the two fourth air guide holes (34) are respectively communicated with the corresponding second air guide holes (31).

3. The high-frequency explosion-proof solenoid valve according to claim 1, wherein: A manual rod fixing pin (12) for fixing the manual rod (11) is slidably connected to the upper end surface of the pilot seat (2).

4. The high-frequency explosion-proof solenoid valve according to claim 1, characterized in that: A first air inlet hole (23) is opened on one outer wall of the valve body (1). A second air inlet hole (24) is opened on the upper end surface of the valve body (1). A plug (15) is slidably connected to the inner side of the second air inlet hole (24). Two air outlet holes (26) are symmetrically opened on the lower end surface of the valve body (1). Two exhaust holes (25) are symmetrically opened on one outer wall of the valve body (1) away from the first air inlet hole (23).

Images