Isolation type lever electromagnetic valve

Abstract

The utility model discloses an isolation type lever electromagnetic valve, which belongs to the technical field of electromagnetic valves, and comprises a valve main body, a piston box, a lever driving box, an isolation cylinder and a lever driving box, wherein the valve main body is provided with a piston box and a lever driving box, the piston box is internally provided with a piston body, the piston body is connected with a piston shaft, the piston box is provided with a closed cylinder, and the piston shaft is arranged in the closed cylinder in a sliding manner; the lever driving device is arranged in the lever driving box and comprises a cylinder body, a transmission sliding shaft fixedly connected with the piston shaft is arranged in the cylinder body in a sliding mode, and two isolating membranes are connected between the transmission sliding shaft and the cylinder body in a sealed mode. According to the technical key points, a piston shaft can slide in a closed cylinder, a transmission sliding shaft fixedly connected with the piston shaft slides in an isolation cylinder, it is ensured that a piston body can only vertically move up and down and cannot deviate during sliding, in addition, two isolation films in the closed cylinder and the isolation cylinder can be combined to form three isolation measures, and the isolation effect is good. And damage of an electromagnetic part caused by leakage of a liquid medium is avoided as far as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an isolation type lever solenoid valve. Background Art

[0002] The operating principle of an isolated lever solenoid valve is based on the interplay of electromagnetic force and leverage. When energized, the current in the solenoid coil generates a magnetic field. This magnetic field attracts the iron core on the valve stem, pulling the stem downward through a lever action, thereby opening the valve. Conversely, when the current is removed, a spring pushes the iron core back into place, closing the valve through a lever action. Since the fluid within the solenoid valve cannot enter the upper valve cover, whether in the open or closed state, the fluid is completely isolated from the electromagnetic actuator, effectively minimizing the fluid's impact on the electromagnetic actuator.

[0003] The utility model with announcement number CN215487926U discloses an isolated lever solenoid valve. The utility model designs structures such as an internal joint and a sealing gasket. The sealing gasket makes the valve plug close to the internal joint, so that there is good sealing between the valve plug and the internal joint, so as to cut off the liquid in the valve body, ensure the stable operation and sealing performance of the solenoid valve, and solve the problem of insufficient sealing of the valve plug in the existing isolated lever solenoid valve, which easily causes liquid leakage.

[0004] However, the above-mentioned valve body lacks guidance and limiting measures for the movement of the valve plug, and the valve plug is only connected by a connecting lever. Although the valve plug can be lifted and opened smoothly, when the valve plug is reset, the valve plug may be offset, resulting in it being unable to completely seal the valve body, causing the valve body to be unable to be completely closed. In addition, the fluid channel and the electromagnetic structure in the above-mentioned valve body are separated by only a layer of sealing sleeve. If the sealing sleeve is damaged, the liquid medium will come into direct contact with the electromagnetic structure, causing damage to the solenoid valve. Therefore, an isolated lever solenoid valve is proposed to address the above problems. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide an isolated lever solenoid valve, in which the piston shaft can slide in the closing cylinder, and the transmission sliding shaft fixedly connected to the piston shaft slides in the isolation cylinder, thereby ensuring that the piston body can only move straight up and down when sliding without offset, thereby avoiding the situation where the piston body offsets and cannot completely cover the channel in the valve. In addition, the two isolation membranes in the closing cylinder and the isolation cylinder can be combined to form three isolation measures, which greatly improves the fault tolerance and avoids the situation where the electromagnetic part is damaged due to leakage of liquid medium as much as possible. It solves the technical problems in the prior art that the valve plug may offset when it is reset, resulting in its inability to completely seal the valve body, and the isolation measures are relatively single, and once damaged, the liquid medium will be in direct contact with the electromagnetic structure, thereby damaging the solenoid valve.

[0006] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0007] An isolated lever solenoid valve includes a valve body, on which a piston box and a lever drive box are installed. A piston body that slides up and down is provided in the piston box, and a piston shaft is connected to the piston body. A closing cylinder is provided on the piston box. The piston shaft is slidably arranged in the closing cylinder and is in close contact with the closing cylinder. The isolation cylinder is arranged in the lever drive box and includes a cylinder body, in which a transmission slide shaft fixedly connected to the piston shaft is slidably provided. Two isolation membranes are sealed between the transmission slide shaft and the cylinder body. An electromagnetic drive mechanism and a lever transmission mechanism are provided in the lever drive box to drive the transmission slide shaft to move up and down.

[0008] Through the above-mentioned structural form, the piston shaft can slide in the closing cylinder, and the transmission sliding shaft fixedly connected to the piston shaft can slide in the isolation cylinder, thereby ensuring that the piston body can only move straight up and down when sliding, and will not deviate, thereby avoiding the situation where the piston body deviates and cannot completely cover the channel inside the valve. In addition, the two isolation membranes in the closing cylinder and the isolation cylinder can be combined to form three isolation measures, which greatly improves fault tolerance and avoids as much as possible the situation where the electromagnetic part is damaged due to leakage of liquid medium.

[0009] In a possible implementation, the electromagnetic drive mechanism includes an electromagnetic coil in which a movable iron core is slidably arranged.

[0010] With the above-mentioned structural form, when the electromagnetic coil is energized and working, it can attract the movable iron core to slide inward, thereby driving the lever transmission mechanism to move.

[0011] In one possible implementation, the lever transmission mechanism includes a transmission pull rod fixedly connected to the movable iron core, the top end of which is rotatably connected to a lever piece, the end of the lever piece is movably connected to the top end of the transmission slide shaft, and a fulcrum shaft located on the lower side of the lever piece is provided in the lever drive box.

[0012] Through the above structure, when the transmission rod moves downward due to the pull of the movable iron core, it will pull the lever plate to rotate with the fulcrum axis as the fulcrum, and then lift the transmission sliding shaft at the other end, thereby achieving the effect of lifting the piston body to open the valve.

[0013] In one possible implementation, a groove is provided at the top of the transmission rod and the transmission slide shaft, a hinge shaft is fixedly arranged in the groove, the transmission rod is rotatably connected to the lever piece through the hinge shaft, a movable groove is provided at the end of the lever piece, and the hinge shaft at the top of the transmission slide shaft is slidably arranged in the movable groove.

[0014] Through the above-mentioned structural form, the hinged connection between the hinge shaft and the lever piece can be realized, and the movable groove can allow the hinge shaft at the top end of the transmission slide shaft to slide therein, ensuring that the lever piece will only apply an upward lifting force to the transmission slide shaft during the rotation process, and will not affect the upward movement of the transmission slide shaft due to geometric relationships.

[0015] In a possible implementation, a return spring is provided on the piston shaft outer sleeve, and two ends of the return spring respectively abut against the piston body and the piston box.

[0016] Through the above structure, the reset spring can push the piston body to reset after the electromagnetic coil is powered off, thereby closing the valve. At the same time, it can also drive the lever transmission mechanism to reset, facilitating the next valve opening action.

[0017] In a possible implementation, a through groove communicating with the piston box is formed at the input end of the valve body, and a bent pipe communicating with the piston box is formed at the output end of the valve body.

[0018] Through the above-mentioned structural form, a complete liquid medium flow path can be formed.

[0019] In one possible implementation, the piston body includes a top connecting plate, a cover plate is fixedly provided on the lower end surface of the top connecting plate, and a plug is fixedly provided on the lower end of the cover plate, wherein the cover plate is used to cover the mouth of the bent pipe, and the plug is used to plug the bent pipe.

[0020] With the above-mentioned structural form, the combined effect of the cover plate and the plug can achieve complete sealing of the bent pipe opening, making it less likely for liquid leakage to occur.

[0021] In a possible implementation, connection ports are fixedly provided at both ends of the valve body, the outer cross-section of the connection ports is hexagonal, and the inner wall of the connection ports is provided with connection threads.

[0022] The above-mentioned structural form can facilitate the connection between the valve body and the pipeline.

[0023] In summary, the present invention has the following beneficial technical effects:

[0024] The piston shaft can slide in the closed cylinder, and the transmission sliding shaft fixedly connected to the piston shaft slides in the isolation cylinder. This structure constrains the movement trajectory of the piston body, ensuring that the piston body can only move straight up and down when sliding without deviation, avoiding the situation where the piston body deviates and cannot completely cover the channel in the valve;

[0025] In addition, the two isolation membranes in the sealing tube and the isolation tube can be combined to form three isolation measures, which greatly improves the fault tolerance and avoids the damage of the electromagnetic part caused by leakage of liquid medium as much as possible, thereby increasing the service life of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0029] Figure 3 It is a partial structural cross-sectional view of the utility model;

[0030] Figure 4 This is a schematic structural diagram of the lever transmission mechanism of the present utility model.

[0031] In the figure: 1. Valve body; 11. Through groove; 12. Bend pipe; 13. Connection port; 2. Piston box; 21. Piston body; 211. Top connecting plate; 212. Cover plate; 213. Plug; 22. Piston shaft; 23. Closing cylinder; 24. Return spring; 3. Lever drive box; 31. Electromagnetic drive mechanism; 311. Electromagnetic coil; 312. Movable iron core; 32. Lever transmission mechanism; 321. Transmission rod; 322. Lever plate; 323. Articulated shaft; 324. Movable groove; 325. Fulcrum shaft; 4. Isolation cylinder; 41. Cylinder body; 42. Transmission slide shaft; 43. Isolation membrane. DETAILED DESCRIPTION

[0032] The technical solution in the embodiments of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0033] like Figure 1 - Figure 3As shown, the present embodiment provides an isolated lever solenoid valve, comprising a valve body 1, on which a piston box 2 and a lever drive box 3 are mounted, wherein a piston body 21 that slides up and down is provided in the piston box 2, a piston shaft 22 is connected to the piston body 21, a sealing cylinder 23 is provided on the piston box 2, the piston shaft 22 is slidably provided in the sealing cylinder 23 and in close contact therewith, an isolation cylinder 4, which is provided in the lever drive box 3, and comprises a cylinder body 41, wherein a transmission slide shaft 42 fixedly connected to the piston shaft 22 is slidably provided, two isolation membranes 43 are sealed between the transmission slide shaft 42 and the cylinder body 41, and an electromagnetic drive mechanism is provided in the lever drive box 3. 31 and the lever transmission mechanism 32 are used to drive the transmission slide shaft 42 to move up and down. Through the above-mentioned structural form, the piston shaft 22 can slide in the closing cylinder 23. In addition, the transmission slide shaft 42 fixedly connected to the piston shaft 22 slides in the isolation cylinder 4. This ensures that the piston body 21 can only move straight up and down when sliding without offset, thereby avoiding the situation where the piston body 21 offsets and cannot completely cover the channel in the valve. In addition, the two isolation membranes 43 in the closing cylinder 23 and the isolation cylinder 4 can be combined to form three isolation measures, which greatly improves fault tolerance and avoids the situation where the electromagnetic part is damaged due to leakage of liquid medium as much as possible.

[0034] like Figure 2-Figure 4 As shown, the electromagnetic drive mechanism 31 includes an electromagnetic coil 311, in which a movable iron core 312 is slidingly arranged. Through the above-mentioned structural form, when the electromagnetic coil 311 is energized and working, it can absorb the movable iron core 312 to slide inward, thereby driving the lever transmission mechanism 32 to move.

[0035] In addition, the lever transmission mechanism 32 includes a transmission pull rod 321 fixedly connected to the movable iron core 312, the top end of which is rotatably connected to the lever piece 322, the end of the lever piece 322 is movably connected to the top of the transmission slide shaft 42, and a fulcrum shaft 325 located on the lower side of the lever piece 322 is provided in the lever drive box 3. Through the above-mentioned structural form, when the transmission pull rod 321 is pulled downward by the movable iron core 312, it will pull the lever piece 322 to rotate with the fulcrum shaft 325 as the fulcrum, and then lift the transmission slide shaft 42 at the other end, thereby achieving the effect of lifting the piston body 21 to open the valve.

[0036] Among them, the top ends of the transmission pull rod 321 and the transmission slide shaft 42 are both provided with grooves, and the hinge shaft 323 is fixedly arranged in the groove. The transmission pull rod 321 is rotatably connected to the lever piece 322 through the hinge shaft 323, and the end of the lever piece 322 is provided with a movable groove 324. The hinge shaft 323 at the top end of the transmission slide shaft 42 is slidably set in the movable groove 324. Through the above structural form, the hinge shaft 323 and the lever piece 322 can be hinged, and the opened movable groove 324 can allow the hinge shaft 323 at the top end of the transmission slide shaft 42 to slide therein, ensuring that the lever piece 322 will only apply a lifting force to the transmission slide shaft 42 during rotation, and will not affect the upward movement of the transmission slide shaft 42 due to geometric relationships.

[0037] like Figure 3 As shown, a return spring 24 is provided on the outer sleeve of the piston shaft 22, and the two ends of the return spring 24 respectively press against the piston body 21 and the piston box 2. Through the above structure, the return spring 24 can push the piston body 21 to reset after the electromagnetic coil 311 is powered off, thereby closing the valve. At the same time, it can also drive the lever transmission mechanism 32 to reset, facilitating the next valve opening action.

[0038] like Figure 2 As shown, the input end of the valve body 1 is provided with a through groove 11 connected to the piston box 2, and the output end of the valve body 1 is provided with a bent pipe 12 connected to the piston box 2. Through the above structure, a complete liquid medium flow path can be formed.

[0039] like Figure 3 As shown, the piston body 21 includes a top connecting piece 211, a cover piece 212 is fixedly provided on the lower end surface of the top connecting piece 211, and a plug column 213 is fixedly provided on the lower end of the cover piece 212, wherein the cover piece 212 is used to cover the mouth of the bent pipe 12, and the plug column 213 is used to plug the bent pipe 12. Through the above-mentioned structural form, the combined action of the cover piece 212 and the plug column 213 can achieve complete sealing of the mouth of the bent pipe 12, making it less likely for liquid leakage to occur.

[0040] like Figure 2 As shown, connection ports 13 are fixedly provided at both ends of the valve body 1, the outer cross-section of which is hexagonal, and the inner wall of which is provided with connection threads. The above structure can facilitate the connection between the valve body 1 and the pipeline.

[0041] The use principle and use process of this utility model:

[0042] The structure in which the piston shaft 22 can slide in the closing cylinder 23 and the transmission sliding shaft 42 fixedly connected to the piston shaft 22 slides in the isolating cylinder 4 constrains the movement trajectory of the piston body 21, ensuring that the piston body 21 can only move straight up and down when sliding without deviation, so that each time it is reset, the cover plate 212 can cover the mouth of the bent pipe 12, and the plug 213 can plug the bent pipe 12, avoiding the situation where the piston body 21 is offset and cannot completely cover the channel inside the valve.

[0043] In addition, the closing cylinder 23 and the two isolation membranes 43 in the isolation cylinder 4 can be combined to form three isolation measures, which greatly improves fault tolerance and avoids the situation where liquid medium leakage causes damage to the electromagnetic part as much as possible, thereby increasing the service life of the solenoid valve.

[0044] During operation, the electromagnetic coil 311 is energized to work and attract the movable iron core 312 to slide inward. When the transmission rod 321 is pulled downward by the movable iron core 312, it will pull the lever piece 322 to rotate around the fulcrum shaft 325, and then lift the transmission sliding shaft 42 at the other end, thereby lifting the piston body 21 to open the valve.

[0045] The hinge shaft 323 at the top of the transmission slide shaft 42 is slidably mounted on the upper surface of the transmission pull rod 321 and the transmission slide shaft 42, and the hinge shaft 323 is fixedly arranged in the groove. The transmission pull rod 321 is rotatably connected to the lever piece 322 through the hinge shaft 323. The end of the lever piece 322 is provided with a movable groove 324. The hinge shaft 323 at the top of the transmission slide shaft 42 is slidably arranged in the movable groove 324. Through the above-mentioned structural form, the hinge shaft 323 and the lever piece 322 can be hinged, and the movable groove 324 can allow the hinge shaft 323 at the top of the transmission slide shaft 42 to slide therein, ensuring that the lever piece 322 will only apply a lifting force to the transmission slide shaft 42 during rotation, and will not affect the upward movement of the transmission slide shaft 42 due to geometric relationships.

[0046] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An isolated lever solenoid valve, characterized in that: include: A valve body (1) on which a piston box (2) and a lever drive box (3) are mounted; The piston box (2) is provided with a piston body (21) that slides up and down, the piston body (21) is connected to a piston shaft (22), the piston box (2) is provided with a sealing cylinder (23), and the piston shaft (22) is slidably arranged in the sealing cylinder (23) and in close contact with the sealing cylinder; An isolation cylinder (4) is provided in the lever drive box (3), comprising a cylinder body (41), wherein a transmission slide shaft (42) fixedly connected to the piston shaft (22) is slidably provided, and two isolation membranes (43) are hermetically connected between the transmission slide shaft (42) and the cylinder body (41); The lever drive box (3) is provided with an electromagnetic drive mechanism (31) and a lever transmission mechanism (32) for driving the transmission slide shaft (42) to move up and down.

2. The isolated lever solenoid valve according to claim 1, characterized in that: The electromagnetic drive mechanism (31) comprises an electromagnetic coil (311) in which a movable iron core (312) is slidably arranged.

3. The isolated lever solenoid valve according to claim 2, characterized in that: The lever transmission mechanism (32) includes a transmission pull rod (321) fixedly connected to the movable iron core (312), the top end of which is rotatably connected to a lever piece (322), the end of the lever piece (322) is movably connected to the top end of the transmission slide shaft (42), and a fulcrum shaft (325) located on the lower side of the lever piece (322) is provided in the lever drive box (3).

4. The isolated lever solenoid valve according to claim 3, characterized in that: The top ends of the transmission pull rod (321) and the transmission slide shaft (42) are both provided with grooves, in which a hinge shaft (323) is fixedly arranged. The transmission pull rod (321) is rotatably connected to the lever piece (322) via the hinge shaft (323). A movable groove (324) is provided at the end of the lever piece (322), and the hinge shaft (323) at the top end of the transmission slide shaft (42) is slidably arranged in the movable groove (324).

5. The isolated lever solenoid valve according to claim 1, characterized in that: The outer sleeve of the piston shaft (22) is provided with a return spring (24), and the two ends of the return spring (24) respectively abut against the piston body (21) and the piston box (2).

6. The isolated lever solenoid valve according to claim 1, characterized in that: The input end of the valve body (1) is provided with a through groove (11) connected to the piston box (2), and the output end of the valve body (1) is provided with a bent pipe (12) connected to the piston box (2).

7. The isolated lever solenoid valve according to claim 1, characterized in that: The piston body (21) comprises a top connecting piece (211), a cover piece (212) is fixedly provided on the lower end surface of the top connecting piece (211), and a plug (213) is fixedly provided on the lower end of the cover piece (212), wherein the cover piece (212) is used to cover the mouth of the bent pipe (12), and the plug (213) is used to plug the bent pipe (12).

8. The isolated lever solenoid valve according to claim 1, characterized in that: The valve body (1) is fixedly provided with connection ports (13) at both ends, the outer cross-section of the valve body (1) is hexagonal, and the inner wall of the valve body (1) is provided with connection threads.

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