Lengthened pilot integrated explosion-proof electromagnetic valve

Abstract

The application discloses a lengthened pilot integrated explosion-proof electromagnetic valve and relates to the technical field of explosion-proof electromagnetic valves, which is used to solve the problem of high cost caused by the fact that a traditional electromagnetic valve is divided into three parts, i.e., a terminal box, a pilot device and a valve body, and internal components are damaged and need to be replaced as a whole. The application comprises a valve body, an end cover, a back cover plate, a terminal box, a terminal post and a coil. The terminal box is installed on the valve body, an installation cavity one is arranged in the valve body, and the coil is installed in the installation cavity one. The application adopts a modular integrated layout to increase the compactness of the overall structure, and compared with the layout structure of a traditional electromagnetic valve, the application is more convenient to install. The valve body and the terminal box are connected through positioning bolts. The application has a simple structure. The valve body has a simple structure, and the terminal box, the pilot pipe and the valve body are integrated, so that only a single part needs to be replaced when a part is damaged, and the maintenance cost is low.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof solenoid valve technology, specifically to an extended pilot-operated explosion-proof solenoid valve. Background Technology

[0002] An explosion-proof solenoid valve is a type of solenoid valve used in flammable and explosive hazardous environments. Its core feature is not to prevent explosions from occurring, but to withstand potential internal explosions and prevent the transfer of internal flames or explosive energy to the external environment, thereby avoiding larger-scale explosion accidents.

[0003] Authorization announcement number CN112797216B discloses an explosion-proof valve comprising a valve body, an explosion-proof housing, and a pilot assembly, with a medium chamber within the valve body. While this design achieves advantages such as quick installation, low manufacturing cost, high sealing performance, and good explosion-proof effect, the junction box, pilot assembly, and valve body are separate components. Damage to internal parts necessitates replacement of some components entirely, resulting in high costs. Therefore, this invention proposes an extended pilot-operated integrated explosion-proof solenoid valve. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that traditional solenoid valves are divided into three parts: junction box, pilot device, and valve body. When internal components are damaged, it is necessary to replace some components as a whole, which is costly. Therefore, this invention proposes an extended pilot-integrated explosion-proof solenoid valve.

[0005] The objective of this invention can be achieved through the following technical solution: an extended pilot-operated explosion-proof solenoid valve, comprising a valve body, an end cap, a rear cover plate, a junction box, a terminal block, and a coil. The bottom of the valve body has an exhaust port one and an exhaust port two. The front end of the valve body has an air inlet one, and the rear end of the valve body has a working chamber outlet one and a working chamber outlet two. The junction box is mounted on the valve body, and an installation chamber one is formed inside the valve body, where the coil is installed. The terminal block is mounted above the installation chamber one via a terminal bracket. The end cap is mounted on the front side of the valve body, and the rear cover plate is mounted on the rear side of the valve body. An installation chamber two is formed in the middle of the coil, and a pilot guide is installed inside the installation chamber two, with a moving iron core and a stationary iron core installed inside the pilot guide. A medium chamber is formed inside the valve body, and a valve core is installed inside the medium chamber.

[0006] In a preferred embodiment of the present invention, the valve body is fixed to the junction box by positioning bolts; the moving iron core and the stationary iron core are in contact at one end inside the pilot tube, and the other ends of the moving iron core and the stationary iron core are both located outside the pilot tube.

[0007] In a preferred embodiment of the present invention, a sealing ring 1 is installed at one end of the pilot tube, and the end of the stationary iron core located outside the pilot tube is installed in the mounting cavity 3, and a sealing ring 2 is installed at the end of the stationary iron core; a plurality of sealing rings 3 are installed on the valve core.

[0008] In a preferred embodiment of the present invention, a round pin is also installed on one side of the valve body located in the mounting cavity three, and a handle is installed on the round pin; a first circular cavity and a second circular cavity located outside the first circular cavity and communicating with it are provided on the rear cover plate.

[0009] In a preferred embodiment of the present invention, the valve body has a first guide hole and a first connecting channel communicating with the first guide hole; the valve body has an air inlet second on one side of the first connecting channel; the first connecting channel communicates with the medium cavity through the air inlet second.

[0010] In a preferred embodiment of the present invention, the valve body is provided with a third guide hole and an eighth guide hole symmetrically arranged below the medium cavity. The third guide hole is connected to the exhaust port one, and the eighth guide hole is connected to the exhaust port two.

[0011] In a preferred embodiment of the present invention, the end cap has a second connecting channel and a third connecting channel connected to the second connecting channel, and the second connecting channel and the third connecting channel are T-shaped.

[0012] In a preferred embodiment of the present invention, a piston chamber is formed on one side wall of the end cap corresponding to the medium cavity, and a receiving cavity is formed around the piston chamber, with a sealing ring four installed inside the receiving cavity; a fourth connecting channel is formed inside the end cap, and the piston chamber communicates with the fourth connecting channel through a fourth guide hole and a fifth guide hole; a mating cavity is also formed on one side wall of the end cap corresponding to the mounting cavity three, and the mating cavity communicates with the fourth connecting channel through a sixth guide hole and a seventh guide hole; the receiving cavity communicates with the third connecting channel through a second guide hole; and the mating cavity communicates with the second connecting channel through a ninth guide hole.

[0013] In a preferred embodiment of the present invention, a sealing element is installed at one end of the first connecting channel, the second connecting channel, the third connecting channel and the fourth connecting channel; the sealing element is a ball bearing.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The modular integrated layout of this invention increases the compactness of the overall structure and is easier to install compared with the traditional solenoid valve layout structure; the valve body and the junction box are connected by positioning bolts; the structure is simple, and compared with the traditional cover, the positioning bolts have self-locking properties, which can ensure the sealing performance between the valve body and the junction box, making maintenance and operation safe and convenient, compact in structure, saving space, and improving the long-term stability and reliability of the valve body.

[0016] 2. The end cap of this invention has high processing precision and better sealing performance, and its position can be adjusted according to installation requirements; the extended pilot integrated explosion-proof solenoid valve of this invention has a simple structure, integrating the junction box, pilot tube and valve body into a single design, and only individual parts need to be replaced when parts are damaged, resulting in low maintenance costs. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the terminals of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall coil structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the pre-catheter structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the handle structure of the present invention;

[0023] Figure 6 This is an internal sectional view of the overall structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the valve body structure of the present invention;

[0025] Figure 8 This is a schematic diagram of the bottom structure of the valve body of the present invention;

[0026] Figure 9 A cross-sectional view of the internal structure of the valve body of the present invention. Figure 1 ;

[0027] Figure 10 A cross-sectional view of the internal structure of the valve body of the present invention. Figure 2 ;

[0028] Figure 11 This is a schematic diagram of the end cap installation of the present invention;

[0029] Figure 12 This is a schematic diagram of the side structure of the valve body of the present invention;

[0030] Figure 13 This is a schematic diagram of the overall structure of the end cap of the present invention;

[0031] Figure 14 This is a schematic diagram of the bottom structure of the end cap of the present invention;

[0032] Figure 15 Cross-sectional view of the end cap structure of the present invention Figure 1 ;

[0033] Figure 16 Cross-sectional view of the end cap structure of the present invention Figure 2 ;

[0034] Figure 17 This is a schematic diagram of the overall structure of the rear cover plate of the present invention;

[0035] Figure 18 This is a schematic diagram of the valve core position under ventilated conditions according to the present invention;

[0036] Figure 19 This is a schematic diagram showing the position of the valve core when the present invention is energized.

[0037] Figure label:

[0038] 1. Valve body; 2. End cap; 3. Rear cover plate; 4. Junction box; 5. Terminal block; 6. Coil; 31. First circular cavity; 32. Second circular cavity; 33. Spring; 51. Terminal bracket; 61. Mounting cavity two; 101. Mounting cavity three; 102. Moving iron core; 103. Pilot tube; 104. Sealing ring one; 105. Round pin; 106. Handle; 107. Medium cavity; 108. Valve core; 109. Stationary iron core; 111. Sealing ring two; 112. Sealing ring three; 113. Mounting cavity one; 121. First guide hole; 122. Third guide hole; 123. Air inlet two; 124. First connecting channel; 125. Ball bearing one ; 126. Eighth guide hole; 127. Exhaust port two; 128. Exhaust port one; 131. Inlet hole one; 132. Working chamber outlet hole one; 133. Working chamber outlet hole two; 201. Second connecting channel; 202. Ball bearing two; 203. Cavity; 204. Sealing ring four; 205. Second guide hole; 206. Fourth guide hole; 207. Fifth guide hole; 208. Sixth guide hole; 209. Seventh guide hole; 210. Third connecting channel; 211. Ball bearing three; 212. Fourth connecting channel; 213. Ball bearing four; 214. Ninth guide hole; 215. Mating cavity; 216. Piston cavity; 217. Piston. Detailed Implementation

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example:

[0040] Please see Figure 1 , Figure 2 and Figure 3 As shown, the extended pilot-operated explosion-proof solenoid valve includes a valve body 1, an end cover 2, a rear cover plate 3, a junction box 4, a terminal block 5, and a coil 6. The junction box 4 is installed on the top of the valve body 1 by positioning bolts. An installation cavity 113 is opened on the upper part of the valve body 1, and the coil 6 is installed in the installation cavity 113. A terminal bracket 51 is installed on the inside of the valve body 1 above the installation cavity 113 by bolts, and a terminal block 5 is installed on the terminal bracket 51. The end cover 2 is installed on the front side of the valve body 1, and the rear cover plate 3 is installed on the rear side of the valve body 1.

[0041] like Figure 17 As shown, a first circular cavity 31 is provided on the rear cover plate 3, and a second circular cavity 32 is provided on the outer side of the first circular cavity 31. The first circular cavity 31 and the second circular cavity 32 are connected.

[0042] Please see Figure 3 and Figure 4 As shown, a second mounting cavity 61 is provided in the middle of the coil 6. A pilot guide 103 is installed inside the second mounting cavity 61. A moving iron core 102 and a stationary iron core 109 are installed inside the pilot guide 103. The moving iron core 102 and the stationary iron core 109 are in contact at one end inside the pilot guide 103, and the other ends of the moving iron core 102 and the stationary iron core 109 are located outside the pilot guide 103. A sealing ring 104 is installed at one end of the pilot guide 103. A third mounting cavity 101 is provided inside the valve body 1. The third mounting cavity 101 is divided into two sections (e.g., ...). Figure 10 As shown), and the center point of the second mounting cavity 61 is on the same horizontal line. The end of the stationary iron core 109 located outside the pilot guide tube 103 is installed in the third mounting cavity 101, and a sealing ring 211 is installed at the end.

[0043] Please see Figure 2 and Figure 6As shown, a medium chamber 107 is provided inside the valve body 1 below the mounting cavity 113. A valve core 108 is installed inside the medium chamber 107, and several sealing rings 112 are installed on the valve core 108. An air inlet 131 is provided on the front end face of the valve body 1, and a working chamber outlet 132 and a working chamber outlet 133 are provided on the rear end face of the valve body 1. The air inlet 131, the working chamber outlet 132, and the working chamber outlet 133 are all connected to the medium chamber 107. A spring 33 is installed at one end of the valve core 108, and one end of the spring 33 is located in the first circular cavity 31.

[0044] Please see Figure 2 and Figure 5 As shown, a round pin 105 is also installed on one side of the mounting cavity 101 on the valve body 1, and a handle 106 is installed on the round pin 105.

[0045] Please see Figure 9 As shown, the valve body 1 has a first guide hole 121 and a first connecting channel 124 inside. One end of the first guide hole 121 is connected to one end of the first connecting channel 124. The other end of the first connecting channel 124 has a ball bearing 125 inside. The valve body 1 has an air inlet 123 on one side of the first connecting channel 124 inside. The first connecting channel 124 is connected to the medium chamber 107 through the air inlet 123.

[0046] Please see Figure 8 , Figure 10 and Figure 12 As shown, the valve body 1 has a third guide hole 122 and an eighth guide hole 126 symmetrically provided inside the medium chamber 107. The bottom of the valve body 1 has an exhaust port 128 and an exhaust port 127. One end of the third guide hole 122 is connected to the exhaust port 128, and one end of the eighth guide hole 126 is connected to the exhaust port 127.

[0047] Please see Figures 11 to 16As shown, the end cap 2 has a second connecting channel 201 and a third connecting channel 210 inside. One end of the second connecting channel 201 has a ball bearing 202, and one end of the third connecting channel 210 has a ball bearing 211. The second connecting channel 201 and the third connecting channel 210 are connected and are T-shaped. A piston chamber 216 is formed on one side wall of the end cap 2, corresponding to the medium chamber 107. A piston 217 is slidably installed inside the piston chamber 216. A receiving cavity 203 is formed around the piston chamber 216, and a sealing ring 204 is installed inside the receiving cavity 203. A fourth guide hole 206 and a fifth guide hole 207 are formed inside the piston chamber 216. A mating cavity 215 is also formed on one side wall of the end cap 2, corresponding to the mounting cavity 101. A sixth guide hole 208 and a seventh guide hole 209 are formed inside the mating cavity 215. A fourth connecting channel 212 is formed inside the end cap 2, and a ball bearing 213 is built into one end of the fourth connecting channel 212. It should be noted that the ball bearing is used for sealing. A second guide hole 205 is formed on one side of the receiving cavity 203, and one end of the second guide hole 205 is connected to the third connecting channel 210.

[0048] The piston chamber 216 is connected to the fourth connecting channel 212 through the fourth guide hole 206 and the fifth guide hole 207; the mating chamber 215 is connected to the fourth connecting channel 212 through the sixth guide hole 208 and the seventh guide hole 209. A ninth guide hole 214 is also provided in the mating chamber 215 between the sixth guide hole 208 and the seventh guide hole 209, and the mating chamber 215 is connected to the second connecting channel 201 through the ninth guide hole 214.

[0049] It should be noted that the connecting channel is a process hole used for connecting and connecting the various guide holes.

[0050] Working principle: Under ventilation conditions (e.g.) Figure 18As shown), the first air inlet 131 is normally connected to the first air outlet 132 of the working chamber, that is, the first air inlet 131 is connected to the first air outlet 132 of the working chamber through the medium chamber 107; at the same time, a part of the gas enters the second air inlet 123 through the first air inlet 131, enters the first guide hole 121 through the first connecting channel 124, then the first guide hole 121 is connected to the second guide hole 205, enters the third connecting channel 210 through the second guide hole 205, enters the second connecting channel 201 through the third connecting channel 210, and then enters the ninth guide hole. 214 is discharged. Part of the discharged gas is discharged through the channels inside the moving iron core 102 and the stationary iron core 109, and the other part enters the fourth connecting channel 212 through the sixth guide hole 208 and the seventh guide hole 209. After entering the piston chamber 216 through the fourth connecting channel 212, the fourth guide hole 206 and the fifth guide hole 207, the gas enters the piston chamber 216. The gas entering the piston chamber 216 pushes the piston 216 to move. The piston 216 pushes the valve core 108 to move. After moving, the gas becomes exhaust gas and is sent to the exhaust port 127 through the eighth guide hole 126 for discharge.

[0051] In the power-on state (e.g.) Figure 19 As shown, the air inlet 131 is connected to the second air outlet 133 of the working chamber, that is, the air inlet 131 is connected to the second air outlet 133 of the working chamber through the medium chamber 107; at the same time, the coil 6 is energized, generating a magnetic field, causing the moving iron core 102 to move inside the pilot guide 103, so that one end of the moving iron core 102 contacts the ninth guide hole 214, so that the gas discharged through the ninth guide hole 214 is directly discharged through the channels inside the moving iron core 102 and the stationary iron core 109. A part of the gas inside the medium chamber 107 passes through the first circular cavity 31 and the second circular cavity 32, pushing the valve core 108 to move, thereby realizing the reset of the valve core 108 by the spring 33 and the gas. After moving, the gas becomes exhaust gas, and after passing through the third guide hole 122, it is discharged from the exhaust port 128.

[0052] This invention's extended pilot-operated explosion-proof solenoid valve adopts a modular integrated layout, increasing the overall structural compactness and facilitating installation compared to traditional solenoid valve layouts. The valve body 1 and junction box 4 are connected by positioning bolts. The structure is simple, and compared to traditional covers, the self-locking nature of the positioning bolts ensures a tight seal between the valve body 1 and junction box 4, making maintenance safe and convenient. The compact structure saves space and improves the long-term stability and reliability of the valve body 1. The end cap 2 has high machining precision, better sealing, and its position can be adjusted according to installation requirements. This invention's extended pilot-operated explosion-proof solenoid valve has a simple structure, integrating the junction box 4, pilot tube 103, and valve body 1. Damaged parts only require replacement of individual parts, resulting in low maintenance costs.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An extended pilot-operated explosion-proof solenoid valve, comprising a valve body, end cap, rear cover plate, junction box, terminal block, and coil; the bottom of the valve body has an exhaust port one and an exhaust port two; the front end face of the valve body has an air inlet one; the rear end face of the valve body has a working chamber outlet one and a working chamber outlet two; a medium chamber is formed inside the valve body, and a valve core is installed inside the medium chamber; characterized in that... The junction box is installed on the valve body, and an installation cavity 1 is opened inside the valve body. The coil is installed in the installation cavity 1. The terminal block is installed above the installation cavity 1 through a terminal bracket. The end cover is installed on the front side of the valve body, and the rear cover plate is installed on the rear side of the valve body. An installation cavity 2 is opened in the middle of the coil. A pilot tube is installed inside the installation cavity 2. A moving iron core and a stationary iron core are installed inside the pilot tube. The valve body is fixed to the junction box by positioning bolts; the moving iron core and the stationary iron core are in contact at one end inside the pilot tube, and the other ends of the moving iron core and the stationary iron core are both located outside the pilot tube; A sealing ring 1 is installed at one end of the pilot tube, and the end of the stationary iron core located outside the pilot tube is installed in the mounting cavity 3, with a sealing ring 2 installed at the end of the stationary iron core; a plurality of sealing rings 3 are installed on the valve core.

2. The extended pilot-operated explosion-proof solenoid valve according to claim 1, characterized in that, A circular pin is also installed on one side of the valve body located in the mounting cavity three, and a handle is installed on the circular pin; a first circular cavity and a second circular cavity located outside the first circular cavity and communicating with it are opened on the rear cover plate.

3. The extended pilot-operated explosion-proof solenoid valve according to claim 1, characterized in that, The valve body has a first guide hole and a first connecting channel communicating with the first guide hole; the valve body has an air inlet second on one side of the first connecting channel; the first connecting channel communicates with the medium cavity through the air inlet second.

4. The extended pilot-operated explosion-proof solenoid valve according to claim 1, characterized in that, The valve body is also provided with a third guide hole and an eighth guide hole symmetrically located below the medium cavity. The third guide hole is connected to the exhaust port one, and the eighth guide hole is connected to the exhaust port two.

5. The extended pilot-operated explosion-proof solenoid valve according to claim 3, characterized in that, The end cap has a second connecting channel and a third connecting channel connected to the second connecting channel. The second connecting channel and the third connecting channel are T-shaped.

6. The extended pilot-operated explosion-proof solenoid valve according to claim 5, characterized in that, A piston chamber is formed on one side wall of the end cap, corresponding to the medium cavity. A piston is installed inside the piston chamber. A receiving cavity is formed around the piston chamber, and a sealing ring is installed inside the receiving cavity. A fourth connecting channel is formed inside the end cap. The piston chamber is connected to the fourth connecting channel through a fourth guide hole and a fifth guide hole. A mating cavity is also formed on one side wall of the end cap, corresponding to the mounting cavity. The mating cavity is connected to the fourth connecting channel through a sixth guide hole and a seventh guide hole. The receiving cavity is connected to the third connecting channel through a second guide hole. The mating cavity is connected to the second connecting channel through a ninth guide hole.

7. The extended pilot-operated explosion-proof solenoid valve according to claim 5, characterized in that, Each of the first, second, third, and fourth connecting channels has a sealing element installed at one end; the sealing element is a ball bearing.

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