A gas-controlled magnetic on-off water valve

Abstract

The present invention relates to an air-controlled magnetic on-off water valve, comprising a valve body, a control pipeline arranged inside the valve body, an input pipeline and an output pipeline, and a control actuator for realizing the on-off of the input pipeline and the output pipeline; the control actuator comprises a first valve core assembly, a plug and a second valve core assembly; air is intermittently introduced into the control pipeline or a vacuum is formed to drive the first valve core assembly to drive the plug to move, and then the second valve core assembly is realized through the water pipeline and the pressure relief pipeline inside the valve body, and the input pipeline and the output pipeline are turned on and off; the present invention adopts an air-controlled magnetic on-off control technology to realize that the opening and closing force of the air-controlled water valve control plug will not be affected by the water pressure, thereby making the applicable water pressure variation range large; at the same time, the control chamber is separately set up, and the liquid entering from the input pipeline and the water pipeline will not enter the control chamber, thereby not causing other devices connected thereto to malfunction.

Description

Technical Field

[0001] The invention relates to the technical field of flushing water valves for vacuum toilet related equipment, and in particular to an air-controlled magnetic on-off water valve. Background Art

[0002] A vacuum toilet is a toilet that makes the entire toilet system into a vacuum state. There is a flushing valve on the passage leading to each toilet that is isolated from the system. When the toilet is flushed, this valve will open, and the excrement in the toilet will be cleaned by the pressure difference between the atmospheric pressure. Most of the flushing valves in the prior art use electromagnetic valve technology. More specifically, firstly, the opening and closing of the diaphragm in the water valve is controlled by the expansion and contraction of the iron core when the electromagnet is energized; secondly, the spherical valve core rotor in the water valve is rotated by the electromagnet to close the water valve; thirdly, a two-position two-way electromagnetic reversing valve is used.

[0003] The above three methods all have the following common problems:

[0004] (1) The installation site environment of the vacuum toilet requires the configuration of easily accessible electrical wires and socket strips. The upgrading of new rural dry toilets to vacuum toilets requires the use of a large number of electrical wires and socket strips, which results in a relatively high project cost. The configured electrical wires, cables and socket strips pose a great safety hazard, involving not only the quality of the socket strips and cables, but also wiring problems.

[0005] (2) The power environment is unstable, especially in remote rural areas. For example, in the Northwest project, the power supply in rural areas is unstable. In some places, there is no power supply in the early morning. During this period, the system cannot be used or the effect of use is affected.

[0006] (3) The power consumption is relatively high. The existing technology often adopts electric drive technology solutions, which have the problem of power consumption, especially in the cold winter and the extreme hot summer weather, the power consumption is even greater;

[0007] (4) There are potential safety hazards. During the electric drive process, the vacuum toilet is not allowed to be used in an environment with water, especially floods. In rural areas, especially in remote mountainous areas, floods and mudslides occur from time to time, which not only cause equipment failures, but also pose a fatal threat to the personal safety of users.

[0008] (5) Maintenance is time-consuming and costly, and installation is inconvenient. During installation and use, a large number of related supporting parts are used, which also occupies a large space. At the same time, as the number of project installations increases, connection interference will be caused to a certain extent, such as wrong pipe connection, etc.

[0009] (6) The cost of use is too high. Since the electromagnetic water valve needs to use a power supply, the power source of the power supply generally includes the following situations: First, the use of battery packs has the disadvantage that the batteries need to be replaced regularly. If the batteries are not replaced for a long time, the battery pack will be depleted and the corresponding equipment will be unusable; second, the use of AC power has the limitations of leakage and unstable power supply from the nearby power grid, and also increases the investment cost to a certain extent; third, the use of solar power is limited by many factors such as season, weather, installation location, cleanliness of the battery panel, etc., which leads to unstable charging and its cost is relatively high; fourth, the use of wind power generation is affected by the surrounding wind energy and also has the problem of unstable charging; furthermore, it also includes other energy sources, such as fuel cell power supply, whose consumables are very expensive, which is not worth the cost and is not convenient for application in the control of electromagnetic water valves.

[0010] At present, pneumatic flushing water valves have also appeared in the existing technology, such as the relevant patent applied for by the first inventor. The water pressure range of the water inlet of this type of pneumatic flushing water valve is limited, and it is not suitable for water pressure in a larger range, especially in rural areas where the water pressure fluctuates greatly, and water supply pipelines in mountainous and hilly villages and towns. More importantly, the service life of related parts of the known technology is easily affected by the water quality of the water supply. For example, a large amount of scale in the water supply source will cause the premature failure of related parts. At the same time, the installation method of pneumatic flushing water valves in the existing technology generally adopts sheet metal clamp installation, which requires two or four parts, which increases the cost of the product to a certain extent.

[0011] Therefore, in view of various problems existing in the prior art, the present invention has developed an air-controlled magnetic on-off water valve to solve the problems existing in the prior art. After searching, no technical solutions identical or similar to the present invention were found. Summary of the invention

[0012] The purpose of the present invention is to provide an air-controlled magnetic on-off water valve to solve the problem that the water pressure range of the water inlet of the flush water valve used in the prior art for vacuum toilets is limited and is not suitable for a larger range of water pressure, thus resulting in its poor applicability, as well as the problems of short life of product components and excessively high installation costs.

[0013] The technical solution of the present invention is: a gas-controlled magnetic on-off water valve, comprising a valve body, a control pipeline arranged inside the valve body, an input pipeline and an output pipeline, and a control actuator for realizing the on-off of the input pipeline and the output pipeline; the outer wall of the valve body is provided with a control port connected to the control pipeline and intermittently introducing air or forming a vacuum, an input port connected to the input pipeline, and an output port connected to the output pipeline; a water pipeline and a pressure relief pipeline are also arranged inside the valve body; the control actuator comprises a first valve core assembly, a plug and a second valve core assembly; the first valve core assembly is lifted and lowered by the pressure change in the control pipeline, and drives the plug to move synchronously; the plug is arranged between the water pipeline and the pressure relief pipeline, controls the on-off between the water pipeline and the pressure relief pipeline, and realizes the pressure difference change at the upper and lower ends of the second valve core assembly; the second valve core assembly is arranged between the input pipeline and the output pipeline, and realizes the lifting and lowering movement through the pressure difference change to switch the input pipeline and the output pipeline.

[0014] Preferably, the interior of the valve body includes a control chamber, a first one-way valve chamber, a second one-way valve chamber and a third one-way valve chamber which are coaxial and arranged in sequence; the first valve core assembly is arranged in the control chamber, and the control chamber is connected to the control pipeline; the plug is arranged in the first one-way valve chamber and can move and extend into the second one-way valve chamber, and the second one-way valve chamber is connected to the pressure relief pipeline and the water pipeline; the second valve core assembly is arranged in the third one-way valve chamber, and the third one-way valve chamber is divided into an upper chamber and a lower chamber, a throttling hole is arranged between the upper chamber and the lower chamber, and the upper chamber is connected to the water pipeline, the lower chamber is connected to the input pipeline and the output pipeline, and the output pipeline is also connected to the pressure relief pipeline.

[0015] Preferably, the first valve core assembly includes a guide sleeve arranged in the control chamber, a first corrugated diaphragm fixedly connected to the upper end of the guide sleeve, and a first return spring for realizing automatic return of the first corrugated diaphragm; the first corrugated diaphragm sealing cover is arranged at the upper end of the control chamber, and the first return spring is sleeved on the outside of the guide sleeve; the upper end of the plug is connected to a second return spring arranged in the first one-way valve chamber; the second valve core assembly includes a second corrugated diaphragm, a sealing plate installed in the middle of the second corrugated diaphragm, and a third return spring for realizing automatic return of the second corrugated diaphragm; the throttle hole is arranged through the sealing plate and the second corrugated diaphragm.

[0016] Preferably, the valve body includes an upper shell, a middle shell and a lower shell which are arranged in sequence from top to bottom; the control chamber, the first one-way valve chamber and the second one-way valve chamber are all arranged in the upper shell, wherein the upper end of the control chamber is open and is not connected with the first one-way valve chamber and the second one-way valve chamber, and the lower ends of the first one-way valve chamber and the second one-way valve chamber are both open and connected; the third one-way valve chamber is formed by a combination of the lower end of the middle shell and the upper end of the lower shell; the control pipeline is arranged in the upper shell and is connected with the control chamber; the input pipeline and the output pipeline are arranged in the lower shell and are respectively connected with the third one-way valve chamber; the water pipeline is arranged in the middle shell, the lower end is connected with the third one-way valve chamber, and the upper end is connected with the second one-way valve chamber; the pressure relief pipeline is arranged in the middle shell and the lower shell, the upper end is connected with the second one-way valve chamber, and a pressure relief port is formed, and the lower end is connected with the output pipeline.

[0017] Preferably, a slot is provided on the outer wall of the upper end of the upper shell, the outer edge end of the first corrugated diaphragm is buckled on the upper end of the upper shell, and the outer end is fixed in position with the slot; the outer edge end of the second corrugated diaphragm is buckled between the step surfaces of the middle shell and the lower shell.

[0018] Preferably, the input port and the output port are both arranged on a quick-connect connector, and the quick-connect connector is fastened and fixed to the lower shell body by fixing screws, and is used to form an input pipeline and an output pipeline communicating with the inside of the valve body, respectively.

[0019] Preferably, the guide sleeve is made of POM, with a permanent magnet fixed on the upper end, and a magnetic ejector pin is fixed on the upper end of the plug; the first return spring and the second return spring are made of non-magnetic stainless steel springs.

[0020] Preferably, the guide sleeve is made of magnetic stainless steel, and a magnetic ejector pin is fixed to the upper end of the plug; the first return spring and the second return spring are made of non-magnetic stainless steel springs.

[0021] Preferably, the guide sleeve is a hollow structure with an opening at the lower end, the lower end surface of the control chamber is provided with a guide groove for plugging and fitting the lower end of the guide sleeve, and a ventilation groove is provided on the side wall of the guide groove.

[0022] Preferably, the plug and the ejector pin are clearance-fitted with the inner wall of the first one-way valve chamber.

[0023] Preferably, a slender plug rod is fixed to the upper end of the upper chamber, and the plug rod is arranged in a vertical direction and inserted in the throttling hole.

[0024] Preferably, a sealing head is provided at the lower end of the sealing plate, and the sealing head is interference fit with the inner end of the output pipeline, and can be moved along the movement direction to the end of the output pipeline to disconnect the output pipeline from the input pipeline.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] (1) The present invention is mainly used in vacuum toilets. Due to the adoption of air-controlled magnetic opening and closing control technology, the opening and closing force of the air-controlled water valve control plug will not be affected by the water pressure, thereby making the applicable water pressure variation range large, especially for the large fluctuations in water pressure of various households in rural areas; at the same time, in terms of the overall structure, the control chamber is set up separately, and the liquid entering from the input pipeline and the water pipeline will not enter the control chamber, thereby not causing malfunctions in other devices connected thereto, and therefore there is no problem of water contaminating other devices.

[0027] (2) The overall structure is easy to install. Only the control port, input port and output port are set on the outer wall. The input port and the output port are fixedly connected to the valve body by quick-plug connectors. The installation is firm and reliable. At the same time, the setting of the quick-plug connector also makes the installation method faster and more convenient.

[0028] (3) The structure is easy to maintain. Since the first corrugated diaphragm and the second corrugated diaphragm are fixedly connected to the valve body by snap-fitting rather than by threaded fixing with a seal, the number of parts used is small, the structure is compact, and disassembly and assembly are convenient, thereby facilitating maintenance.

[0029] (4) The appearance and structure are elegant and uncomplicated, compact, small and light, and a large number of components can be made by injection molding, which further increases the portability and achieves low transportation cost of a single product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0031] Figure 1 This is a schematic diagram of the appearance and structure of a gas-controlled magnetic on-off water valve according to the present invention;

[0032] Figure 2 This is a cross-sectional view of a gas-controlled magnetic on-off water valve according to the present invention;

[0033] Figure 3 is a cross-sectional view of the valve body of the present invention;

[0034] Figure 4 It is an exploded cross-sectional structural diagram of the upper shell, the middle shell and the lower shell of the present invention;

[0035] Figure 5This is a schematic diagram of the arrangement structure of the first valve core assembly and the plug of the present invention;

[0036] Figure 6 It is a schematic diagram of the arrangement structure of the second valve core assembly of the present invention;

[0037] Figure 7 is a cross-sectional view of the sealing plate of the present invention;

[0038] Figure 8 It is a cross-sectional view of a gas-controlled magnetic on-off water valve in a non-working state according to the present invention;

[0039] Fig. 9 It is a cross-sectional view of a gas-controlled magnetic on-off water valve in the working state described in the present invention.

[0040] Among them: 1. Valve body;

[0041] 11. Upper shell, 12. Middle shell, 13. Lower shell, 14. Quick-connect fitting, 15. Control pipeline, 16. Input pipeline, 17. Output pipeline, 18. Water pipeline, 19. Pressure relief pipeline;

[0042] 151, control port, 161, input port, 171, output port, 191, pressure relief port;

[0043] 101, control chamber, 102, first one-way valve chamber, 103, second one-way valve chamber, 104, third one-way valve chamber, 1041, upper chamber, 1042, lower chamber;

[0044] 2. The first valve core assembly;

[0045] 21. guide sleeve, 22. first corrugated diaphragm, 23. first return spring, 24. permanent magnet, 25. guide groove, 26. ventilation groove;

[0046] 3. Plug;

[0047] 31. ejector pin, 32. second return spring;

[0048] 4. Second valve core assembly;

[0049] 41. second corrugated diaphragm, 42. sealing plate, 43. third return spring, 44. insertion rod;

[0050] 421, sealing head, 422, throttle hole. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with specific embodiments:

[0052] like Figure 1 , Figure 2As shown, a pneumatically controlled magnetic on-off water valve comprises a valve body 1, a control pipeline 15, an input pipeline 16 and an output pipeline 17 arranged inside the valve body 1, and a control actuator for realizing the on-off of the input pipeline 16 and the output pipeline 17; in short, a control port 151 connected to the control pipeline 15 and intermittently passing air or forming a vacuum, an input port 161 connected to the input pipeline 16, and an output port 171 connected to the output pipeline 17 are arranged on the outer wall of the valve body 1; a water pipeline 18 and a pressure relief pipeline 19 are also arranged inside the valve body 1. ; The control actuator includes a first valve core assembly 2, a plug 3 and a second valve core assembly 4; the first valve core assembly 2 is lifted and lowered by controlling the pressure change in the pipeline 15, and drives the plug 3 to move synchronously; the plug 3 is arranged between the water pipeline 18 and the pressure relief pipeline 19, controls the on-off between the water pipeline 18 and the pressure relief pipeline 19, and realizes the pressure difference change between the upper and lower ends of the second valve core assembly 4; the second valve core assembly 4 is arranged between the input pipeline 16 and the output pipeline 17, realizes the lifting and lowering movement by the pressure difference change to open and close the input pipeline 16 and the output pipeline 17.

[0053] More specifically, Figure 3 , Figure 4 As shown, the valve body 1 includes an upper shell 11, a middle shell 12 and a lower shell 13 which are arranged in sequence from top to bottom; the interior of the valve body 1 includes a control chamber 101, a first one-way valve chamber 102, a second one-way valve chamber 103 and a third one-way valve chamber 104 which are coaxially and arranged in sequence; wherein the control chamber 101, the first one-way valve chamber 102 and the second one-way valve chamber 103 are all arranged in the upper shell 11, the upper end of the control chamber 101 is open and is not connected to the first one-way valve chamber 102 and the second one-way valve chamber 103, the lower ends of the first one-way valve chamber 102 and the second one-way valve chamber 103 are both open and connected; the third one-way valve chamber 104 is formed by combining the lower end of the middle shell 12 and the upper end of the lower shell 13; the control pipeline 15 is arranged on the upper The housing 11 is in communication with the control chamber 101; the input pipeline 16 and the output pipeline 17 are arranged in the lower housing 13 and are respectively connected to the third one-way valve chamber 104, and the input port 161 and the output port 171 are both arranged on the quick-connect connector 14, which is fastened and fixed to the lower housing 13 by fixing screws, and is respectively used to form an input pipeline 16 and an output pipeline 17 connected with the inside of the valve body 1; the water pipeline 18 is arranged in the middle housing 12, the lower end of which is connected to the third one-way valve chamber 104, and the upper end of which is connected to the second one-way valve chamber 103; the pressure relief pipeline 19 is arranged in the middle housing 12 and the lower housing 13, the upper end of which is connected to the second one-way valve chamber 103, and a pressure relief port 191 is formed, and the lower end is connected to the output pipeline 17.

[0054] Combination Figure 2As shown, the first valve core assembly 2 is arranged in the control chamber 101, and the control chamber 101 is connected to the control pipeline 15; the plug 3 is arranged in the first one-way valve chamber 102, and can move and extend to the second one-way valve chamber 103, and the second one-way valve chamber 103 is connected to the pressure relief pipeline 19 and the water pipeline 18; the second valve core assembly 4 is arranged in the third one-way valve chamber 104, and the third one-way valve chamber 104 is divided into an upper chamber 1041 and a lower chamber 1042, a throttling hole 422 is arranged between the upper chamber 1041 and the lower chamber 1042, and the upper chamber 1041 is connected to the water pipeline 18, the lower chamber 1042 is connected to the input pipeline 16 and the output pipeline 17, and the output pipeline 17 is also connected to the pressure relief pipeline 19.

[0055] like Figure 5 As shown, the first valve core assembly 2 includes a guide sleeve 21 arranged in the control chamber 101, a first corrugated diaphragm 22 fixedly connected to the upper end of the guide sleeve 21, and a first return spring 23 for realizing automatic return of the first corrugated diaphragm 22; the first corrugated diaphragm 22 sealing cover is arranged at the upper end of the control chamber 101, and the outer wall of the upper shell 11 connected thereto is provided with a card slot, the outer edge end of the first corrugated diaphragm 22 is buckled on the upper end of the upper shell 11, and the outer end is fixed with the card slot; the first return spring 23 is sleeved on the outer side of the guide sleeve 21, and the guide sleeve 21 is open at the lower end. The hollow structure of the mouth is provided, and the lower end surface of the control chamber 101 is provided with a guide groove 25 for the lower end of the guide sleeve 21 to be plugged in, and the side wall of the guide groove 25 is provided with a ventilation groove 26, so that the lower end of the guide sleeve 21 can move freely in the guide groove 25; a ejector pin 31 is fixed to the upper end of the plug 3, and is connected to a second return spring 32 arranged in the first one-way valve chamber 102, and a clearance fit is adopted between the plug 3 and the ejector pin 31 and the inner wall of the first one-way valve chamber 102; wherein, the first return spring 23 and the second return spring 32 are both made of non-magnetic stainless steel springs.

[0056] There are mainly two types of structures for realizing the synchronous movement of the first valve core assembly 2 driving the plug 3: first, the guide sleeve 21 is made of POM, a permanent magnet 24 is fixed on the upper end, and the ejector pin 31 fixed on the upper end of the plug 3 is magnetic; second, the guide sleeve 21 is made of magnetic stainless steel, and a magnetic ejector pin 31 is fixed on the upper end of the plug 3.

[0057] like Figure 6 As shown, the second valve core assembly 4 includes a second corrugated diaphragm 41, a sealing plate 42 installed in the middle of the second corrugated diaphragm 41, and a third return spring 43 for realizing automatic return of the second corrugated diaphragm 41; wherein the outer edge end of the second corrugated diaphragm 41 is buckled between the step surfaces of the middle shell 12 and the lower shell 13; as shown Figure 7As shown, a sealing head 421 is provided at the lower end of the sealing plate 42. The sealing head 421 is interference fit with the inner end of the output pipeline 17 and can be moved along the movement direction to the end of the output pipeline 17 to disconnect the output pipeline 17 from the input pipeline 16; the throttle hole 422 is arranged through the sealing plate 42 and the second corrugated diaphragm 41, and a slender plug rod 44 is fixed to the upper end of the upper chamber 1041. The plug rod 44 is arranged in the vertical direction and inserted in the throttle hole 422.

[0058] The working principle of the present invention is specifically as follows, wherein the structure for realizing the synchronous movement of the first valve core assembly 2 and the plug 3 is taken as an example of fixing the permanent magnet 24 at the upper end of the guide sleeve 21:

[0059] First, in the non-working state, the control port 151 is connected to air:

[0060] like Figure 8 As shown, in this state, the air pressure in the control chamber 101 is equal to the external air pressure, that is, the air pressure at the upper and lower ends of the first corrugated diaphragm 22 is equal, and the first corrugated diaphragm 22 is reset and raised under the spring force of the first reset spring 23, thereby generating a larger distance between the permanent magnet 24 and the ejector pin 31, so that the magnetic attraction force generated by the permanent magnet 24 on the ejector pin 31 is smaller, and the spring force of the second reset spring 32 is greater than the magnetic attraction force, so that the ejector pin 31 and the plug 3 are pressed tightly against the pressure relief port 191.

[0061] The water entering through the input port 161 enters the lower chamber 1042 through the input pipe 16, and enters the upper chamber 1041, the water pipe 18 and the second one-way valve chamber 103 through the throttle hole 422. At this time, since the pressure relief port 191 is closed, the water entering through the input port 161 will not enter the pressure relief pipe 19; and since the plug 3 and the ejector pin 31 are in clearance with the inner wall of the first one-way valve chamber 102, the water will enter the first one-way valve chamber 102 above the ejector pin 31.

[0062] As for the second corrugated diaphragm 41, both its upper and lower ends are filled with water. Under the action of the third return spring 43 and part of the water pressure, it moves downward, and the sealing head 421 at the lower end of the sealing plate 42 is sealed at the inner end of the output pipeline 17, thereby disconnecting the connection between the input pipeline 16 and the output pipeline 17, thereby realizing the closing of the air-controlled water valve.

[0063] In this state, the air flow path in the space connected to the control port 151 is as follows: Figure 8 As shown by the dotted line in FIG. 1 , the flow path of water entering from the input port 161 is as follows Figure 8 As shown by the solid line in .

[0064] Second, in the working state, the control port 151 forms a vacuum:

[0065] like Fig. 9As shown, in this state, a pressure difference is generated between the vacuum in the control chamber 101 and the external air pressure, so the first corrugated diaphragm 22 is subjected to a downward force, thereby overcoming the action of the first return spring 23 and gradually descending, and the permanent magnet 24 also descends together with the guide sleeve 21. When it drops to the lowest point, the magnetic attraction force generated by the permanent magnet 24 gradually increases until the magnetic attraction force overcomes the spring force of the second return spring 32, and the ejector pin 31 attracts the plug 3 and moves it upward, so that the plug 3 is separated from the pressure relief port 191, and the low pressure of the output port 171 is connected to the water pressure of the upper chamber 1041 to achieve rapid pressure relief.

[0066] At this time, due to the throttling effect of the throttling hole 422, the water in the lower chamber 1042 has no time to enter the upper chamber 1041, which causes the water pressure in the upper chamber 1041 to be less than the water pressure in the lower chamber 1042, and the second corrugated diaphragm 41 is subjected to an upward pressure, which overcomes the spring force of the third return spring 43 and causes the second corrugated diaphragm 41 to drive the sealing plate 42 to detach from the inner end of the output pipeline 17, thereby connecting the input pipeline 16 and the output pipeline 17, so that the water entering from the input port 161 can be freely discharged into the downstream output port 171; at the same time, as the second corrugated diaphragm 41 moves upward, the accumulated water in its upper chamber 1041 is discharged into the output port 171 through the pressure relief pipeline 19.

[0067] In this state, the water entering the input port 161 is Fig. 9 The dotted line in the figure flows out to the output port 171, and the accumulated water in the upper chamber 1041 flows along Fig. 9 The solid line in FIG. 1 is discharged to the output port 171 through the pressure relief pipeline 19 .

[0068] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A gas-controlled magnetic on-off water valve, characterized in that: It includes a valve body, a control pipeline arranged inside the valve body, an input pipeline and an output pipeline, and a control actuator for realizing the switching of the input pipeline and the output pipeline; the outer wall of the valve body is provided with a control port connected to the control pipeline and intermittently introducing air or forming a vacuum, an input port connected to the input pipeline, and an output port connected to the output pipeline; a water pipeline and a pressure relief pipeline are also arranged inside the valve body; the control actuator includes a first valve core assembly, a plug and a second valve core assembly; the first valve core assembly is lifted and lowered by the pressure change in the control pipeline, and drives the plug to move synchronously; the plug is arranged between the water pipeline and the pressure relief pipeline, controls the switching between the water pipeline and the pressure relief pipeline, and realizes the pressure difference change between the upper and lower ends of the second valve core assembly; the second valve core assembly is arranged between the input pipeline and the output pipeline, and realizes the lifting and lowering movement by the pressure difference change to switch the input pipeline and the output pipeline; The valve body includes a control chamber, a first one-way valve chamber, a second one-way valve chamber and a third one-way valve chamber which are coaxial and arranged in sequence; the first valve core assembly is arranged in the control chamber, and the control chamber is connected to the control pipeline; the plug is arranged in the first one-way valve chamber and can move and extend into the second one-way valve chamber, and the second one-way valve chamber is connected to the pressure relief pipeline and the water pipeline; the second valve core assembly is arranged in the third one-way valve chamber, and the third one-way valve chamber is divided into an upper chamber and a lower chamber, a throttling hole is arranged between the upper chamber and the lower chamber, and the upper chamber is connected to the water pipeline, the lower chamber is connected to the input pipeline and the output pipeline, and the output pipeline is also connected to the pressure relief pipeline; The first valve core assembly includes a guide sleeve arranged in the control chamber, a first corrugated diaphragm fixedly connected to the upper end of the guide sleeve, and a first return spring for realizing automatic return of the first corrugated diaphragm; the first corrugated diaphragm sealing cover is arranged at the upper end of the control chamber, and the first return spring is sleeved on the outer side of the guide sleeve; the upper end of the plug is connected to a second return spring arranged in the first one-way valve chamber; the second valve core assembly includes a second corrugated diaphragm, a sealing plate installed in the middle of the second corrugated diaphragm, and a third return spring for realizing automatic return of the second corrugated diaphragm; the throttle hole is arranged through the sealing plate and the second corrugated diaphragm; The guide sleeve is made of POM, with a permanent magnet fixed on the upper end, and a magnetic ejector pin fixed on the upper end of the plug; the first return spring and the second return spring are made of non-magnetic stainless steel springs; A slender insertion rod is fixed to the upper end of the upper chamber. The insertion rod is arranged in a vertical direction and inserted in the throttling hole.

2. The pneumatically controlled magnetic on-off water valve according to claim 1, characterized in that: The valve body includes an upper shell, a middle shell and a lower shell which are arranged in sequence from top to bottom; the control chamber, the first one-way valve chamber and the second one-way valve chamber are all arranged in the upper shell, wherein the upper end of the control chamber is open and is not connected with the first one-way valve chamber and the second one-way valve chamber, and the lower ends of the first one-way valve chamber and the second one-way valve chamber are both open and connected; the third one-way valve chamber is formed by combining the lower end of the middle shell and the upper end of the lower shell; the control pipeline is arranged in the upper shell and is connected with the control chamber; the input pipeline and the output pipeline are arranged in the lower shell and are respectively connected with the third one-way valve chamber; the water pipeline is arranged in the middle shell, the lower end is connected with the third one-way valve chamber, and the upper end is connected with the second one-way valve chamber; the pressure relief pipeline is arranged in the middle shell and the lower shell, the upper end is connected with the second one-way valve chamber, and a pressure relief port is formed, and the lower end is connected with the output pipeline.

3. The pneumatically controlled magnetic on-off water valve according to claim 2, characterized in that: A slot is provided on the outer wall of the upper end of the upper shell, the outer edge end of the first corrugated diaphragm is buckled on the upper end of the upper shell, and the outer end is fixed with the slot; the outer edge end of the second corrugated diaphragm is buckled between the step surfaces of the middle shell and the lower shell.

4. The pneumatically controlled magnetic on-off water valve according to claim 3, characterized in that: The input port and the output port are both arranged on the quick-insertion connector, which is locked and fixed on the lower shell body by fixing screws, and is used to form an input pipeline and an output pipeline communicating with the inside of the valve body respectively.

5. The pneumatically controlled magnetic on-off water valve according to claim 3, characterized in that: The guide sleeve is made of magnetic stainless steel, and a magnetic ejector pin is fixed to the upper end of the plug; the first return spring and the second return spring are made of non-magnetic stainless steel springs.

6. The pneumatically controlled magnetic on-off water valve according to claim 5, characterized in that: The guide sleeve is a hollow structure with an opening at the lower end. The lower end surface of the control chamber is provided with a guide groove for plugging and fitting the lower end of the guide sleeve. A ventilation groove is provided on the side wall of the guide groove.

7. The pneumatically controlled magnetic on-off water valve according to claim 5, characterized in that: The plug and the ejector pin are clearance-fitted with the inner wall of the first one-way valve chamber.

8. The pneumatically controlled magnetic on-off water valve according to claim 1, characterized in that: A sealing head is provided at the lower end of the sealing plate. The sealing head is interference-fitted with the inner end of the output pipeline and can be moved to the end of the output pipeline along the movement direction to disconnect the output pipeline from the input pipeline.

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