CN211475019U

CN211475019U - Low-voltage pulse electromagnetic valve

Info

Publication number: CN211475019U
Application number: CN201922413610.5U
Authority: CN
Inventors: 徐建明; 徐慷; 熊国富; 梁雄飞; 孙乐宜; 聂国麒; 黄晓菊; 王玉宇; 孙莹; 马德芳; 欧华武; 冯霞
Original assignee: Shanghai Zhaomin New Materials Technology Co ltd
Current assignee: Shanghai Zhaomin New Materials Technology Co ltd
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2020-09-11
Anticipated expiration: 2029-12-29

Abstract

The utility model relates to a solenoid valve technical field. In order to solve the problems of unstable water pressure and smaller water pressure of running water in old communities, the utility model provides a low-voltage pulse electromagnetic valve, wherein an inner pipe, a clamping groove and an overflow groove are arranged on a valve seat; the positioning convex ring on the diaphragm pad is clamped in the clamping groove; the diaphragm member is pressed on the diaphragm pad, and the water inlet pipe and the water outlet pipe are respectively inserted in the overflow tank and the inner pipe; the positioning frame is inserted in the valve seat and pressed on the positioning convex ring, and a partition plate is arranged in the guide pipe to form a magnet accommodating cavity and a piston accommodating cavity; the seat plate is sleeved on the guide pipe and fixed at the top of the valve seat; the coil is sleeved on the guide tube and is inserted and fixed on the seat plate; the coil clamping frame is connected with the coil and the seat plate to fix the coil; the bar magnet is positioned in the magnet accommodating cavity; the piston is inserted in the piston accommodating cavity and can be pressed on the inlet pipe table; the upper end of stand pipe is established to stifled cap cover, and inside is equipped with the iron prop, and the magnet ring is established to outside cover. The low-pressure pulse electromagnetic valve can supply water at low pressure and has low power consumption.

Description

Low-voltage pulse electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field especially relates to a low pressure pulse solenoid valve.

Background

At present, tap water in a plurality of old communities in China has unstable water pressure and low water pressure, so that when the water supply device is used, especially in a peak period, water cannot be normally supplied to a user due to too low water pressure, water consuming appliances of the user such as a washing machine, a water heater and an intelligent toilet cannot be used, and the normal life of the user is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of unstable water pressure and smaller water pressure of running water in old communities, the utility model provides a low-voltage pulse electromagnetic valve which comprises a valve body, a diaphragm mechanism, a positioning guide piece, an electromagnetic mechanism and a plugging cap;

a valve seat is arranged between the water inlet and the water outlet of the valve body, an overflow groove communicated with the water inlet is arranged between an outer shell and an inner tube of the valve seat, a clamping groove for mounting the diaphragm mechanism is arranged on the inner wall of the outer shell, the inner tube is communicated with the water outlet, and the inlet end face of the inner tube is lower than the groove bottom of the clamping groove;

the diaphragm mechanism comprises a diaphragm pad and a diaphragm piece, wherein a water outlet pipe hole and a water inlet pipe hole are formed in the diaphragm pad, and a positioning convex ring is arranged at the outer edge of the diaphragm pad; the diaphragm piece comprises a pressing plate and a surrounding plate, the pressing plate is pressed on the diaphragm pad, a water outlet pipe and a water inlet pipe are arranged at the bottom of the pressing plate, the water outlet pipe penetrates through the water outlet pipe hole and is inserted into the inner pipe, the water inlet pipe penetrates through the water inlet pipe hole and is inserted into the overflow groove, and the inner diameter of the water outlet pipe is larger than that of the water inlet pipe; an inlet pipe table is arranged at the top of the pressing plate, is positioned above the water outlet pipe and is communicated with the water outlet pipe; the coaming is arranged at the edge of the pressing plate in a surrounding manner, a water containing groove is formed at the top of the pressing plate, a pressing ring is arranged on the outer side wall of the coaming, and the pressing ring is lapped on the inner edge of the clamping groove; when the diaphragm mechanism is arranged on the valve body, the diaphragm pad is pressed on the inner pipe, and the positioning convex ring on the diaphragm pad is clamped in the clamping groove;

the positioning guide piece comprises a positioning frame and a guide pipe, the positioning frame is inserted into the valve seat, and the lower end of the positioning frame is inserted into the clamping groove and pressed on the positioning convex ring on the diaphragm pad; the guide pipe is positioned above the valve seat, a partition plate is arranged in the guide pipe, the partition plate divides an inner cavity of the guide pipe into a magnet accommodating cavity and a piston accommodating cavity, and the magnet accommodating cavity is positioned above the piston accommodating cavity;

the electromagnetic mechanism comprises a seat plate, a coil clamping frame, a bar magnet, a piston and a piston spring, wherein the seat plate is sleeved on the guide pipe and is fixedly arranged at the top of the shell of the valve seat; the coil is sleeved on the guide tube and is inserted and fixed on the seat plate; the coil clamping frame comprises a vertical plate and a horizontal plate which are vertically connected, the lower end of the vertical plate is vertically connected with the seat plate at the outer edge of the seat plate, and the horizontal plate is sleeved on the guide tube and pressed at the top of the coil; the bar magnet is inserted into the magnet accommodating cavity; the suction end of the piston is inserted into the piston accommodating cavity, and the pushing head of the piston is connected with the diaphragm piece and can be pressed on the inlet pipe table; the piston spring is positioned in the piston accommodating cavity and sleeved on the suction end of the piston;

the blocking cap is located above a horizontal plate in the coil clamping frame and sleeved at the upper end of the guide pipe, an iron column is arranged in the blocking cap, and a magnet ring which is mutually attracted by the bar-shaped magnets is sleeved outside the blocking cap.

The utility model discloses low pressure pulse solenoid valve's theory of operation as follows:

firstly, before the coil is electrified for one time, the bar magnet is attracted by the magnet ring and attached to the iron column in the blocking cap, the push-pull head of the piston is pressed on the inlet pipe table under the action of gravity, and the water containing groove in the diaphragm piece is communicated with the overflow groove through the water inlet pipe. At the moment, the pressure in the water containing groove is equal to the pressure in the overflow groove, namely the pressure at the water inlet of the valve body and is higher than the pressure in the water outlet of the valve body, and the diaphragm pad is tightly attached to the inner pipe to separate the overflow groove and the inner pipe under the action of the diaphragm piece and the water pressure in the water containing groove, so that the water inlet and the water outlet of the valve body are separated, and the valve body is in a disconnected state.

And then, after the coil is electrified for the first time, the bar magnet moves downwards in the magnet accommodating cavity under the action of an electromagnetic field generated by the coil until the bar magnet falls onto the partition plate in the guide tube, and the piston moves upwards under the action of the electromagnetic field generated by the coil until the piston is kept still in the piston accommodating cavity due to stress balance. The push-pull head of the piston is separated from the water inlet pipe table due to the upward movement of the piston, and the water containing groove in the diaphragm piece is communicated with the inner pipe of the valve body through the water outlet pipe. At this time, because the inner diameter of the water outlet pipe is larger than the inner diameter of the water inlet pipe, namely the water outlet speed of the water outlet pipe is larger than the water inlet speed of the water inlet pipe, the pressure in the water containing groove is equal to the pressure at the water outlet of the valve body and is lower than the pressure in the water overflow groove, namely the water inlet of the valve body, the middle part of the diaphragm pad is deformed and moves upwards under the action of the water pressure in the water overflow groove to be separated from the inner pipe, and therefore the water inlet and the water outlet of the valve body.

Then, after the power supply of the coil is cut off, the electromagnetic field generated by the coil disappears, the piston is kept still in the piston accommodating cavity under the attraction of the bar magnet, the push-pull head of the piston is kept in a separated state with the water inlet pipe table, and the valve body is kept in a conducting state, namely a normally-on state.

And finally, when the coil is electrified for the second time, the coil is reversely powered, so that the coil generates a reverse electromagnetic field, the bar magnet is driven to move upwards until the bar magnet is adsorbed on the iron column in the plugging cap, the piston is driven to move downwards until the push-pull head of the piston is pressed on the water inlet pipe table, the water containing groove and the inner pipe are separated, the diaphragm pad is pressed downwards through the diaphragm piece until the diaphragm pad is tightly attached to the inner pipe, and then the water inlet and the water outlet of the valve body are disconnected, namely the valve body is disconnected.

To sum up, it is visible, the utility model discloses low pressure pulse solenoid valve only needs to remove bar magnet and piston through the electromagnetic field that the coil produced to bar magnet and piston effect, changes the relation of the pressure of pressure in the holding water tank and the pressure of the water inlet department of valve body and the delivery port department of valve body, can realize the break-make of valve body. Therefore, the utility model discloses the break-make of low pressure pulse solenoid valve is irrelevant with the water pressure's that supplies water height, so also can normally supply water when water pressure is lower, effectively solves the unstable problem that brings of water pressure and water pressure of running water in the old district. Additionally, the utility model discloses low pressure pulse solenoid valve outage again can be in normal open state after the circular telegram switches on, and is power consumptive few, and use cost is low.

Preferably, a sealing slot is arranged on the positioning convex ring of the diaphragm gasket, an inserting convex ring is arranged at the lower end of the positioning frame, and the inserting convex ring is inserted into the sealing slot. Like this, the grafting bulge loop of locating rack lower extreme is planted in the sealed slot that the diaphragm was filled up, can improve the leakproofness between the lower extreme of locating rack and the shell of disk seat, avoids the water in the overflow tank to enter into the holding basin in the diaphragm spare from the edge of diaphragm pad, influences the utility model discloses the stability of low pressure pulse solenoid valve's performance. Furthermore, a top convex ring and a bottom convex ring are arranged at the outer edge of the positioning convex ring of the diaphragm pad. Like this, can further improve the leakproofness between the lower extreme of the location bulge loop of diaphragm pad and the shell of disk seat and locating rack, during the appearance basin that water in the overflow tank entered into in the diaphragm spare from the edge of diaphragm pad, influence the utility model discloses the stability of low pressure pulse solenoid valve's performance.

Preferably, the inner diameter of the inlet pipe table is smaller than that of the water outlet pipe, and the inner diameter of the inlet pipe table is not smaller than that of the water inlet pipe. Therefore, when the water containing tank is communicated with the inner pipe through the water outlet pipe, the phenomenon that the pressure intensity in the water containing tank is increased suddenly due to the fact that the inner diameter of the inlet pipe table is larger than that of the water outlet pipe, and the pressure intensity in the water outlet pipe is larger than that of the water containing tank, and the use of the low-voltage pulse electromagnetic valve is influenced can be avoided; when holding basin and inner tube and cutting off, can avoid being less than the internal diameter of inlet tube because of the internal diameter of inlet tube platform and lead to holding the water pressure increase suddenly in the basin and follow inlet tube bench jack-up with the puller of piston, make and hold basin and inner tube intercommunication, influence the utility model discloses low pressure pulse solenoid valve's use.

Preferably, the clamping frame is arranged on the pressing plate and comprises a top plate and a support plate, the top plate is located above the inlet pipe table and is fixed on the pressing plate through the support plate, the top plate is provided with a mounting hole for inserting the piston, and when the piston is inserted into the mounting hole, the push-pull head of the piston is located between the pressing plate and the top plate and can move up and down between the pressing plate and the top plate under the driving of the piston. Like this, the direction that reciprocates of mounting hole pair piston on the usable roof is guided control, avoids rocking of piston and influences the push-and-pull head of piston and seals the water inlet of outlet pipe, influences the utility model discloses low-voltage pulse solenoid valve's performance. Furthermore, an insertion groove for detaching the piston is formed in the top plate. Therefore, when the piston is assembled, the piston can be directly installed in the installation hole in the top plate through the insertion groove, and the piston assembling device is simple and convenient.

Preferably, a cap groove is arranged on the push-pull head of the piston, a piston cap is installed in the cap groove, and the piston cap can be pressed on the inlet pipe table. Like this, the push-and-pull head accessible piston cap of piston seals the inlet tube platform, can improve the leakproofness of push-and-pull head pressure when putting on the inlet tube platform, avoids the inlet tube platform to leak and influence low pressure pulse solenoid valve's performance.

Preferably, the outer walls of the water inlet pipe and the water outlet pipe are provided with positioning clamping protrusions. Like this, can avoid making diaphragm spare and diaphragm pad separation because of roll-off in inlet tube and the outlet pipe hole of water inlet pipe and the outlet pipe follow diaphragm pad, lead to the utility model discloses low pressure pulse solenoid valve trouble.

Preferably, the coil clamp frame is connected with the seat plate through a buckle. Like this, vertical board in the coil card frame passes through the buckle with the bedplate and is connected, can guarantee the connection stability between the coil card bedplate, and then guarantees that the position of coil is stable, improves the utility model discloses low-voltage pulse solenoid valve's stability of performance.

Preferably, the top of the blocking cap is provided with a limiting brim, the magnet ring is inserted between the coil and a horizontal plate in the coil clamping frame, and the magnet ring is clamped between the limiting brim and the coil. Therefore, when in use, the utility model discloses the performance of low pressure pulse solenoid valve can be avoided magnet ring activity or dislocation and influence.

Drawings

Fig. 1 is a schematic view of an assembly structure of a low-voltage pulse solenoid valve according to the present invention;

3 FIG. 32 3 is 3 a 3 schematic 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 31 3; 3

FIG. 3 is a schematic sectional view of the structure of B-B in FIG. 1;

fig. 4 is an enlarged schematic view of Q in fig. 2.

Detailed Description

The low-voltage pulse solenoid valve of the present invention will be described in detail with reference to fig. 1 to 4.

As shown in fig. 1-3, the low-voltage pulse electromagnetic valve of the present invention includes a valve body, a diaphragm mechanism, a positioning guide, an electromagnetic mechanism and a plug cap. Wherein, a valve seat 13 is arranged between the water inlet 11 and the water outlet 12 of the valve body, an overflow groove 133 communicated with the water inlet 11 is arranged between an outer shell 131 and an inner pipe 132 of the valve seat 13, a clamping groove 134 for installing a diaphragm mechanism is arranged on the inner wall of the outer shell 131, the inner pipe 132 is communicated with the water outlet 12, and the inlet end surface of the inner pipe 132 is lower than the groove bottom of the clamping groove 134.

As shown in fig. 2-4, the diaphragm mechanism includes a diaphragm pad 21 and a diaphragm member 22. Wherein, the diaphragm pad 21 is provided with a water outlet pipe hole (not shown) and a water inlet pipe hole (not shown), and the outer edge of the diaphragm pad 21 is provided with a positioning convex ring 211. The diaphragm member 22 comprises a pressing plate 221 and a surrounding plate 222, the pressing plate 221 is pressed on the diaphragm pad 21, a water outlet pipe 223 and a water inlet pipe 224 are arranged at the bottom of the pressing plate 221, the water outlet pipe 223 penetrates through a water outlet pipe hole and is inserted into the inner pipe 132, the water inlet pipe 224 penetrates through a water inlet pipe hole and is inserted into the overflow groove 133, and the inner diameter of the water outlet pipe 223 is larger than that of the water inlet pipe 224; the top of the pressing plate 221 is provided with an inlet pipe table 225, and the inlet pipe table 225 is positioned above the water outlet pipe 223 and communicated with the water outlet pipe 223; the surrounding plate 222 surrounds the edge of the pressing plate 221 and forms a water containing groove 226 at the top of the pressing plate 221, and a pressing ring (not shown) is arranged on the outer side wall of the surrounding plate 222 and is overlapped on the inner edge of the clamping groove. Preferably, the pressing ring may be formed by bending the surrounding plate 222 in a direction approaching the catching groove 134. When the diaphragm mechanism is mounted on the valve body, the diaphragm pad 21 is pressed on the inner tube 132, and the positioning convex ring 211 on the diaphragm pad 21 is clamped in the clamping groove 134. Preferably, the positioning convex ring 211 of the diaphragm gasket 21 is provided with a sealing slot 2111 for installing the positioning guide member, so as to improve the sealing performance between the positioning guide member and the housing 131 of the valve seat 13, and prevent the water in the overflow groove 133 from entering the water containing groove 226 in the diaphragm member 22 from the edge of the diaphragm gasket 21, thereby affecting the stability of the performance of the low-voltage pulse solenoid valve. Preferably, a top collar 2112 and a bottom collar 2113 are provided at the outer edge of the positioning collar 221 of the diaphragm pad 21. Like this, can further improve the leakproofness between the location bulge loop 211 of diaphragm pad 21 and the shell 131 of disk seat 13 and the location guide, avoid the water in the overflow tank 133 to enter into the holding basin 226 in the diaphragm 22 from the edge of diaphragm pad 21, influence the utility model discloses the stability of low pressure pulse solenoid valve's performance. Preferably, the outer walls of the water inlet pipe 224 and the water outlet pipe 223 are provided with

positioning protrusions

2241 and 2231. Like this, can avoid making diaphragm 22 and diaphragm pad 21 separate because of inlet tube 224 and outlet pipe 223 follow the inlet tube hole of diaphragm pad 21 and go out the roll-off in the outlet tube hole, lead to the utility model discloses low pressure pulse solenoid valve trouble. Preferably, the inner diameter of the inlet pipe stand 225 is smaller than that of the outlet pipe 223, and the inner diameter of the inlet pipe stand 225 is not smaller than that of the inlet pipe 224. Therefore, when the water containing tank 226 is communicated with the inner pipe 132 through the water outlet pipe 223, the water pressure in the water outlet pipe 223 can be prevented from being suddenly enhanced and even being higher than the pressure in the water containing tank 226 due to the fact that the inner diameter of the inlet pipe stand 225 is larger than the inner diameter of the water outlet pipe 223, and the use of the low-pressure pulse electromagnetic valve of the utility model is prevented from being influenced; when holding basin 226 and inner tube 132 and cutting off, can avoid being less than the internal diameter of inlet tube 224 because of the internal diameter of inlet tube platform 225 and lead to holding the water pressure increase suddenly in the basin 226 and jack-up the push head of piston from inlet tube platform 225, make and hold basin 226 and inner tube 132 intercommunication, influence the utility model discloses low pressure pulse solenoid valve's use.

As shown in fig. 1 to 4, the positioning guide includes a positioning frame 31 and a guide tube 32, wherein the positioning frame 31 is inserted into the valve seat 13, and the lower end of the positioning frame 31 is inserted into the catching groove 134 and pressed against the positioning boss 221 on the diaphragm gasket 21. Preferably, the lower end of the positioning frame 31 is provided with a plug-in convex ring 311, and the plug-in convex ring 311 is inserted into the sealing slot 2111 on the positioning convex ring 211. Like this, the grafting bulge loop 311 of locating rack 31 lower extreme is planted in the sealed slot 2111 on diaphragm pad 21, can improve the leakproofness between the lower extreme of locating rack 31 and the shell 131 of disk seat 13, avoids the water in the overflow tank to enter into the holding in the basin in the diaphragm spare from the edge of diaphragm pad, influences the utility model discloses the stability of low pressure pulse solenoid valve's performance. The guide tube 32 is positioned above the valve seat 13, a partition 321 is provided in the guide tube 32, the partition 321 divides an inner cavity of the guide tube 32 into a magnet accommodating chamber 322 and a piston accommodating chamber 323, and the magnet accommodating chamber 322 is positioned above the piston accommodating chamber 323.

As shown in fig. 1-3, the electromagnetic mechanism includes a seat plate 41, a coil 42, a coil holder 43, a bar magnet 44, a piston 45, and a piston spring 46. Wherein, the seat plate 41 is sleeved on the guide tube 32 in the positioning guide and is installed and fixed on the top of the shell 131 of the valve seat 13. The coil 42 is fitted over the guide tube 32 and is inserted into the seat plate 41. The coil holder 43 includes a vertical plate 431 and a horizontal plate 432 which are vertically connected, a lower end of the vertical plate 431 is vertically connected to the seat plate 41 at an outer edge of the seat plate 41, and the horizontal plate 432 is pressed on a top of the coil 42. Preferably, the horizontal plate 432 is provided with a positioning slot (not shown) for locking the positioning column 421 at the top of the coil 42, so as to prevent the horizontal plate 432 from being forced to move and affecting the use of the low-voltage pulse solenoid valve of the present invention. Preferably, the coil clip 43 is connected with the seat plate 41 by a snap. Like this, coil card frame 43 passes through the buckle with bedplate 41 and is connected, can guarantee the stability of being connected between coil card frame 43 and the bedplate 41, and then guarantees coil 42's stable in position, improves the utility model discloses low-voltage pulse solenoid valve's stability of performance. The bar magnet 44 is inserted in the magnet accommodating chamber 332. The suction end of the piston 45 is inserted into the piston receiving chamber 323, and the push-pull head 451 of the piston 45 is connected to the diaphragm member 21 and is pressed against the inlet boss 225. Preferably, the push-pull head 451 of the piston is provided with a cap groove (not shown in the figure), a piston cap 452 made of rubber is installed in the cap groove, and the piston cap 452 can be pressed on the inlet pipe table 225, so that the sealing performance when the push-pull head 451 of the piston 45 blocks the inlet pipe table 225 is improved, and the sensitivity of the low-pressure pulse solenoid valve is improved. The piston spring housing 46 is disposed on the attracting end of the piston 45, and the piston spring 46 is abutted against the partition 321 when the piston 45 is moved upward by the electromagnetic field generated by the coil 42. The piston 45 is preferably made of medical grade stainless steel material to avoid the piston 45 from rusting and clamping to influence the performance of the low-pressure pulse electromagnetic valve. Preferably, the pressing plate 221 in the diaphragm member 22 is provided with a clamping frame 227, the clamping frame 227 comprises a top plate 2271 and a support plate 2272, the top plate 2271 is located above the inlet tube stand 225 and is fixed on the pressing plate 221 through the support plate 2272, a mounting hole (not shown in the figure) for inserting the piston 45 is provided on the top plate 2271, and when the piston 45 is inserted into the mounting hole, the push-pull head 451 of the piston 45 is located between the pressing plate 211 and the top plate 2271 and can move up and down between the pressing plate 211 and the top plate 2271 under the driving of the piston 45. Like this, the direction of reciprocating of piston 45 is guided to the mounting hole on the usable roof 2271 and is controlled, can avoid rocking of piston 45 and influence the push-and-pull head 451 of piston 45 and seal the water inlet of outlet pipe 223, influence the utility model discloses low-voltage pulse solenoid valve's performance. Preferably, the top plate 2271 is provided with a cartridge slot 22711 for removal of the piston 45. Therefore, when in assembly, the piston 45 can be directly installed in the installation hole on the top plate 2271 through the insertion groove, and the assembly is simple and convenient. Preferably, a cushion 47 is disposed in the shaft tube of the coil 42, and the cushion 47 is sleeved on the guide tube 32 and located at the bottom end of the guide tube 32 to prevent the coil 42 from shaking or even misplacing on the guide tube 32.

As shown in fig. 1 to 3, the plugging cap 5 is located above the coil clamp 43 and is sleeved on the upper end of the guide tube 32, an iron column 51 for adsorbing the bar magnet 44 is arranged in the plugging cap 5, and a magnet ring 6 mutually attracted with the bar magnet 43 is sleeved outside the plugging cap 5. Preferably, the top of the plugging cap 5 is provided with a position-limiting brim 52, the magnet ring 6 is inserted between the coil 43 and the horizontal plate 432 of the coil holder 43, and the magnet ring 6 is clamped between the position-limiting brim 52 and the coil 42. Therefore, when in use, the magnet ring 6 can be prevented from moving or being misplaced to influence the performance of the low-voltage pulse electromagnetic valve. Preferably, the plugging cap 5 is connected with the guide tube 32 through a snap fit, and the connection is simple, convenient and stable.

firstly, before the coil is electrified for one time, the bar magnet is attracted by the magnet ring and is adsorbed on the iron column in the blocking cap, the push-pull head of the piston is pressed on the inlet pipe table under the action of gravity, and the water containing groove in the diaphragm piece is communicated with the overflow groove through the water inlet pipe. At the moment, the pressure in the water containing groove is equal to the pressure in the overflow groove, namely the pressure at the water inlet of the valve body and is higher than the pressure in the water outlet of the valve body, and the diaphragm pad is tightly attached to the inner pipe to separate the overflow groove and the inner pipe under the action of the diaphragm piece and the water pressure in the water containing groove, so that the water inlet and the water outlet of the valve body are separated, and the valve body is in a disconnected state.

Claims

1. A low-voltage pulse electromagnetic valve is characterized by comprising a valve body, a diaphragm mechanism, a positioning guide piece, an electromagnetic mechanism and a plugging cap;

2. The low-pressure pulse solenoid valve according to claim 1, wherein a sealing slot is provided on the positioning convex ring of the diaphragm gasket, and an insertion convex ring is provided at the lower end of the positioning frame and inserted into the sealing slot.

3. The low-pressure pulse solenoid valve according to claim 2, wherein a top protruding ring and a bottom protruding ring are provided at the outer edge of the positioning protruding ring of the diaphragm gasket.

4. The low pressure pulse electromagnetic valve according to any one of claims 1 to 3, wherein the inner diameter of the inlet pipe stand is smaller than the inner diameter of the outlet pipe, and the inner diameter of the inlet pipe stand is not smaller than the inner diameter of the inlet pipe.

5. The low-pressure pulse solenoid valve according to claim 4, wherein the pressure plate is provided with a clamping frame, the clamping frame comprises a top plate and a support plate, the top plate is located above the inlet pipe table and fixed on the pressure plate through the support plate, the top plate is provided with a mounting hole for inserting the piston, and when the piston is inserted into the mounting hole, the push-pull head of the piston is located between the pressure plate and the top plate and can move up and down between the pressure plate and the top plate under the driving of the piston.

6. The low pressure pulse solenoid valve of claim 5, wherein said top plate is provided with a cartridge slot for removal of said piston.

7. The low-pressure pulse electromagnetic valve according to claim 6, wherein the push-pull head of the piston is provided with a cap groove, a piston cap is installed in the cap groove, and the piston cap can be pressed on the inlet pipe table.

8. The low-pressure pulse electromagnetic valve according to any one of claims 1 to 3, wherein the outer walls of the water inlet pipe and the water outlet pipe are provided with positioning clamping protrusions.

9. The low-voltage pulse solenoid valve according to any one of claims 1 to 3, wherein the vertical plate in the coil holder is connected with the seat plate by a snap fit.

10. The low-voltage pulse solenoid valve according to any one of claims 1 to 3, wherein a limiting brim is disposed on the top of the blocking cap, the magnet ring is inserted between the blocking cap and a horizontal plate in the coil clamping frame, and the magnet ring is clamped between the limiting brim and the coil.