A bidirectional balanced air pressure magnetic valve

Abstract

The present invention relates to a two-way balanced air pressure magnetic valve, which belongs to the technical field of ventilation valves. The two-way balanced air pressure magnetic valve comprises a valve body, a top cover, an intake valve and an exhaust valve arranged in the valve body, a sleeve is arranged in the valve body, a first sealing ring and a second sealing ring are arranged at two ends of the sleeve, a top cover with an air hole is covered on the top of the valve body and pressed against the first sealing ring, a sealing surface matching the second sealing ring is arranged on the top of the intake valve, the intake valve is provided with a central hole and a flow hole, a side flow hole connected with the flow hole is arranged at the lower part of the valve body, the exhaust valve is movably penetrated in the central hole, a valve cover matching the first sealing ring is arranged on the top of the exhaust valve, a first annular magnet is arranged at the bottom of the valve body, a second annular magnet with the same pole opposite to the first annular magnet is arranged at the bottom of the intake valve, the valve body has three states: closed, intake and exhaust. With this structure, the valve body can take in and out air when discharging sewage and pumping sewage, and is closed when idle, thereby achieving the deodorizing and waterproof effects of ventilation during operation and closing during idle time.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation valves, and in particular relates to a bidirectional balanced air pressure magnetic valve. Background Art

[0002] An air vent will be set on the integrated sewage lifting equipment to connect the inside of the integrated sewage lifting equipment with the external atmosphere. Its main functions are: 1. When sewage flows into the integrated sewage lifting equipment, the integrated sewage lifting equipment needs to be exhausted. If there is no exhaust, the air pressure in the integrated sewage lifting equipment will be too high, and the sewage will not be able to flow smoothly into the integrated sewage lifting equipment; 2. When the integrated sewage lifting equipment is working to pump water, gas needs to enter the integrated sewage lifting equipment. If no supplementary gas enters the integrated sewage lifting equipment, negative pressure will be generated in the integrated sewage lifting equipment, and finally the sewage cannot be discharged; so air vents must be set on the integrated sewage lifting equipment. At present, there are two ways to design vents. 1. The vents of medium and large-scale integrated sewage lifting equipment are directly connected to the pipes leading to the courtyard. The pipes and exhaust holes are always connected. The pipe mouth will be connected to the feces in the sewage tank, which will cause the vents to have a very strong smell. Even if they lead to the outdoors, various odors will be floating everywhere. 2. A piece of activated carbon is integrated in the vent of small-scale integrated sewage lifting equipment to ensure air intake and exhaust. However, the adsorption capacity of activated carbon is limited and will fail over time. This vent is always in an open state, and the sewage in the integrated sewage lifting equipment cannot be completely drained, and there will be wastewater containing feces in it. Therefore, a small amount of odor will still be emitted into the room every time water is released and drained. If the adsorption capacity of activated carbon is lost, it will eventually cause the indoor bathroom where the integrated sewage lifting equipment is located to have an odor. Since the vent is in an open state, when the integrated sewage lifting equipment fails and cannot drain, draining water will cause the sewage in the integrated sewage lifting equipment to overflow from the pores into the room. In addition, for the sewer pipes of high-rise buildings, the old drainage system does not have a dedicated ventilation pipe, which will lead to unstable air pressure inside and outside the drainage system, slow drainage speed, and water seal damage. The new drainage system is equipped with an air supply pipe, but due to the high floors and fast drainage speed, the anti-odor water in the sinking bend set near the pipe will cause siphoning, and the water will be sucked away, and finally there will be a constant odor in the room.

[0003] Therefore, a bidirectional balanced air pressure magnetic valve which is anti-backflow and anti-odor is in urgent need of appearance. Summary of the invention

[0004] The invention provides a two-way balanced air pressure magnetic valve, which is used to solve the technical problems in the prior art that the vent hole of the sewage lifting integrated equipment has stinky water, and the drainage system of the high-rise building has slow drainage and odor.

[0005] The present invention is achieved through the following technical scheme: a two-way balanced air pressure magnetic valve, comprising a valve body, a top cover, and an intake valve and an exhaust valve arranged in the valve body, a sleeve is arranged in the valve body, a first sealing ring and a second sealing ring are respectively arranged at both ends of the sleeve, the top cover is covered on the top of the valve body and pressed against the first sealing ring, the top cover is provided with an air hole, a sealing surface matching the second sealing ring is arranged on the top of the intake valve, the intake valve is provided with a center hole and flow holes arranged around the center hole, a side flow hole connected to the flow hole is arranged at the lower part of the valve body, the exhaust valve is movably penetrated in the center hole, a valve cover matching the first sealing ring is arranged on the top of the exhaust valve, a first annular magnet is arranged at the bottom of the valve body, a second annular magnet with the same pole opposite to the first annular magnet is arranged at the bottom of the intake valve, and the valve body has three states: closed, intake and exhaust.

[0006] Furthermore, in order to better realize the present invention, when the valve body is in the intake state, the internal pressure of the equipment is less than the external pressure, the intake valve and the exhaust valve are acted upon by the external pressure and overcome the magnetic pole repulsion between the first annular magnet and the second annular magnet to sink, and the sealing surface of the intake valve separates from the second sealing ring and forms a flow channel, so that the air hole, the flow channel and the side flow hole are connected.

[0007] Furthermore, in order to better realize the present invention, when the valve body is in a closed state, the internal pressure of the equipment is equal to the external pressure, the intake valve is pressed against the second sealing ring by the magnetic pole repulsion force between the first annular magnet and the second annular magnet, the exhaust valve falls due to gravity and the valve cover seals the intake valve arrangement to disconnect the air hole from the flow channel and the side flow hole.

[0008] Furthermore, in order to better implement the present invention, when the valve body is in the exhaust state, the internal pressure of the equipment is greater than the external pressure, and the valve cover is affected by the internal pressure and rises to connect the side flow hole, the flow hole and the air hole.

[0009] Furthermore, in order to better implement the present invention, an annular step groove is provided on the top of the intake valve, and a third sealing ring is provided in the annular step groove. When the valve body is in a closed state and an intake state, the valve cover seal is pressed on the third sealing ring.

[0010] Furthermore, in order to better implement the present invention, the exhaust valve is a round tube with a through bottom and a closed top.

[0011] Furthermore, in order to better realize the present invention, the top cover includes an integrally formed limiting portion and a plug-in portion, the air hole is arranged on the limiting portion, the top end of the valve body is provided with an outer edge matching the limiting portion, the plug-in portion is provided with an external thread, the top of the valve body is provided with an internal thread matching the external thread, and the bottom of the plug-in portion is tightly pressed against the first sealing ring.

[0012] Furthermore, in order to better implement the present invention, a deodorizing filler is further included, and the deodorizing filler is filled in the cavity between the first sealing ring and the limiting portion.

[0013] Furthermore, in order to better realize the present invention, a first annular groove opening upward is provided at the bottom of the valve body, and a second annular groove opening downward is provided at the bottom of the intake valve. The first annular magnet and the second annular magnet are respectively embedded in the first annular groove and the second annular groove. Rubber flat pads for sealing are provided in the first annular groove and the second annular groove.

[0014] Furthermore, in order to better implement the present invention, the first sealing ring, the second sealing ring and the third sealing ring are all rubber rings.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The two-way balanced air pressure magnetic valve provided by the present invention comprises a valve body, a top cover, an intake valve and an exhaust valve arranged in the valve body, a sleeve is arranged in the valve body, a first sealing ring and a second sealing ring are respectively arranged at two ends of the sleeve, the top cover is covered on the top end of the valve body and pressed against the first sealing ring, the top cover is provided with an air hole, a sealing surface matching the second sealing ring is arranged on the top of the intake valve, the intake valve is provided with a central hole and flow holes arranged around the central hole, a side flow hole connected with the flow hole is arranged at the lower part of the valve body, the exhaust valve is movably arranged in the central hole, a valve cover matching the first sealing ring is arranged on the top of the exhaust valve, and the valve body A first annular magnet is provided at the bottom, and a second annular magnet with the same pole opposite to the first annular magnet is provided at the bottom of the air inlet valve. The valve body has three states: closed, air intake and exhaust. With this structure, the air inlet valve and the exhaust valve can change their positions in the valve body under the action of magnetism, gravity and the internal and external pressure difference, thereby forming a channel for air circulation in the valve body, so that when the equipment needs to discharge and pump sewage, air can enter and exit the valve body to balance the internal and external air pressure. When idle, the channel is closed to prevent sewage and odor from overflowing through the valve body, thereby achieving the odor-proof and waterproof effect of ventilation during work and closure during idle time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the bidirectional balanced air pressure magnetic valve in the present invention when it is in a closed state;

[0019] Figure 2It is a structural schematic diagram of the bidirectional balanced air pressure magnetic valve in the present invention in the air intake state;

[0020] Figure 3 It is a structural schematic diagram of the bidirectional balanced air pressure magnetic valve in the exhaust state of the present invention.

[0021] In the figure:

[0022] 1-valve body; 101-side flow hole; 102-outer edge; 103-first annular groove; 2-top cover; 21-limiting part; 211-air hole; 22-plug-in part; 3-inlet valve; 31-sealing surface; 32-center hole; 33-flow hole; 34-annular step groove; 35-second annular groove; 4-exhaust valve; 41-valve cover; 5-bushing; 6-first sealing ring; 7-second sealing ring; 8-first annular magnet; 9-second annular magnet; 10-flow channel; 11-third sealing ring; 12-deodorizing filler; 13-rubber flat pad. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment 1:

[0027] In this embodiment, a bidirectional balanced air pressure magnetic valve, such as Figures 1 to 3 As shown, it includes a valve body 1, a top cover 2, and an intake valve 3 and an exhaust valve 4 arranged in the valve body 1. Specifically, a bushing 5 is arranged in the valve body 1, and a first sealing ring 6 and a second sealing ring 7 are arranged at both ends of the bushing 5. The top cover 2 covers the top of the valve body 1 and presses against the first sealing ring 6. The top cover 2 is provided with an air hole 211, and external air can enter the valve body 1 through the air hole 211. A sealing surface 31 matching the second sealing ring 7 is arranged on the top of the intake valve 3. After the intake valve 3 is pressed against the second sealing ring 7 by an external force, air cannot pass between the sealing surface 31 and the second sealing ring 7. The intake valve 3 is provided with a center hole 32 and flow holes 33 arranged around the center hole 32. A side flow hole 101 connected with the flow hole 33 is arranged at the lower part of the valve body 1. The air in the equipment enters the valve body 1 through the side flow hole 101 and can be connected to the air hole 2 through the flow hole 33. 11. The exhaust valve 4 is movably arranged in the center hole 32. A valve cover 41 matching the first sealing ring 6 is arranged on the top of the exhaust valve 4. After the exhaust valve 4 is moved upward and pressed against the first sealing ring 6 or moved downward and pressed against the top of the intake valve 3 by external force, the air in the equipment can no longer be connected to the air hole 211 through the flow hole 33. A first annular magnet 8 is arranged at the bottom of the valve body 1. A second annular magnet 9 with the same pole opposite to the first annular magnet 8 is arranged at the bottom of the intake valve 3, so that the sealing surface 31 of the intake valve 3 is pressed upward against the second sealing ring 7 under the repulsive force of the same magnetic pole. The valve body 1 has three states: closed, intake and exhaust. When closed, the internal pressure of the valve body 1 is balanced with the external pressure. When intake, the internal pressure of the valve body 1 is less than the external pressure, and the sewage lifting integrated equipment is in a sewage pumping state. When exhaust, the internal pressure of the valve body 1 is greater than the external pressure, and the sewage lifting integrated equipment is in a sewage discharging state.

[0028] With this structure, the air inlet valve 3 and the exhaust valve 4 can change their positions in the valve body 1 under the action of magnetism, gravity and the internal and external pressure difference, thereby forming a channel for air circulation in the valve body 1, so that when the sewage lifting integrated equipment needs to discharge and pump sewage, the valve body 1 can allow air to enter and exit to balance the internal and external air pressures, and when not in use, the channel is closed to prevent sewage and odor from overflowing through the valve body 1, thereby achieving the odor-proof and waterproof effect of ventilation during operation and closure during idle time.

[0029] In this embodiment, Figure 2As shown, when the valve body 1 is in the air intake state, the internal pressure of the equipment is less than the external pressure, and the sewage lifting integrated equipment is discharging sewage, and external air needs to be added to balance the internal and external air pressures. At this time, the air intake valve 3 and the exhaust valve 4 are acted upon by the external pressure and overcome the magnetic pole repulsion between the first annular magnet 8 and the second annular magnet 9 to sink, so that the sealing surface 31 of the air intake valve 3 is separated from the second sealing ring 7 and forms a flow channel 10, so that the air hole 211, the flow channel 10 and the side flow hole 101 are connected, so that external air enters the valve body 1 through the air hole 211, and is then added into the sewage lifting integrated equipment through the side flow hole 101 along the channel, so that the internal and external pressures remain balanced, which facilitates smooth sewage discharge.

[0030] In this embodiment, Figure 1 As shown, when the valve body 1 is in a closed state, the internal pressure of the equipment is equal to the external pressure, and the sewage lifting integrated equipment neither pumps nor discharges sewage, and it is necessary to prevent the sewage odor from overflowing. At this time, the air inlet valve 3 is pressed upward against the second sealing ring 7 by the magnetic pole repulsion between the first annular magnet 8 and the second annular magnet 9, thereby blocking and closing the flow channel 10. At the same time, the exhaust valve 4 naturally falls under the action of gravity, so that the valve cover 41 seals the top of the air inlet valve 3, thereby closing the flow hole 33 through the valve cover 41, so that the air hole 211 is disconnected from the flow channel 10 and the side flow hole 101. At this time, the air flow inside and outside the valve body 1 is completely disconnected, thereby preventing the odor from overflowing.

[0031] In this embodiment, Figure 3 As shown, when the valve body 1 is in the exhaust state, the internal pressure of the equipment is greater than the external pressure. The sewage lifting integrated equipment is pumping sewage, and the air in the equipment needs to be discharged to balance the internal and external air pressures. At this time, the valve cover 41 is acted upon by the internal pressure and rises, opening the flow hole 33 to connect the side flow hole 101, the flow hole 33 and the air hole 211, so that the air in the equipment can be discharged through the side flow hole 101, the flow hole 33 and the air hole 211. It is worth noting that when sewage is sucked into the equipment, the air in the equipment is squeezed, and the internal pressure acts on the exhaust valve 4, so that the exhaust valve 4 and The valve cover 41 rises and abuts against the first sealing ring 6 to form a seal. When the internal pressure force acting on the valve cover 41 is less than the gravity of the valve cover 41 and the exhaust valve 4, the exhaust valve 4 and the valve cover 41 will descend, so that the side flow hole 101, the flow hole 33 and the air hole 211 are connected. When the internal pressure force acting on the valve cover 41 is greater than the gravity of the valve cover 41 and the exhaust valve 4 again, the exhaust valve 4 and the valve cover 41 will rise and abut against the first sealing ring 6 again to form a seal, so that the exhaust valve 4 is in dynamic balance during the entire sewage extraction process.

[0032] According to a preferred embodiment, Figures 1 to 3As shown, an annular step groove 34 is provided on the top of the above-mentioned intake valve 3, and a third sealing ring 11 is provided in the above-mentioned annular step groove 34. The above-mentioned third sealing ring 11 is used to improve the sealing between the above-mentioned intake valve 3 and the exhaust valve 4, so that the rigid contact between the above-mentioned intake valve 3 and the exhaust valve 4 when they abut against each other is changed to an elastic contact with better sealing. When the above-mentioned valve body 1 is in a closed state and an intake state, the above-mentioned valve cover 41 is subjected to the action of gravity and external pressure, so as to be pressed downward on the above-mentioned third sealing ring 11 in a sealed manner. The above-mentioned first sealing ring 6, the second sealing ring 7 and the third sealing ring 11 are preferably rubber rings.

[0033] In this embodiment, Figures 1 to 3 As shown, the exhaust valve 4 is a round tube with a through bottom and a closed top. When a fault or power outage occurs, the sewage in the sewage lifting integrated equipment will flow back out of the valve body 1. When the sewage flows into the hollow of the exhaust valve 4, the exhaust valve 4 will rise under the buoyancy of the water until it contacts the first sealing ring 6 to form a seal. The greater the buoyancy, the tighter the seal, thereby preventing the sewage from being discharged.

[0034] According to a preferred embodiment, Figures 1 to 3 As shown, the top cover 2 includes an integrally formed limiting portion 21 and a plug-in portion 22, the air hole 211 is arranged on the limiting portion 21, the top end of the valve body 1 is provided with an outer edge 102 matching the limiting portion 21, the limiting portion 21 is tightly fitted with the outer edge 102, the plug-in portion 22 is provided with an external thread, the top of the valve body 1 is provided with an internal thread matching the external thread, the bottom of the plug-in portion 22 is pressed against the first sealing ring 6 to fix the position of the first sealing ring 6, and when the exhaust valve 4 rises and presses against the first sealing ring 6, it can form a tight seal with the first sealing ring 6 to disconnect the air hole 211 from the flow hole 33 below.

[0035] In this embodiment, Figures 1 to 3 As shown, it also includes a deodorizing filler 12. The deodorizing filler 12 is filled in the cavity between the first sealing ring 6 and the limiting portion 21. When external air enters the valve body 1 through the air hole 211, and when the internal air of the device is discharged to the outside, it will pass through the deodorizing filler 12, thereby completely absorbing the odor and preventing the odor from overflowing. The deodorizing filler 12 is preferably activated carbon or bamboo charcoal.

[0036] According to a preferred embodiment, Figures 1 to 3As shown, a first annular groove 103 with an opening facing upward is provided at the bottom of the valve body 1, and a second annular groove 35 with an opening facing downward is provided at the bottom of the intake valve 3. The first annular magnet 8 and the second annular magnet 9 are respectively embedded in the first annular groove 103 and the second annular groove 35, wherein the first annular groove 103 is located below the second annular groove 35, and the diameter of the first annular groove 103 is larger than the diameter of the second annular groove 35. The first annular magnet 8 and the second annular magnet 9 with the same poles facing each other ensure that the intake valve 3 is always subjected to the repulsive force exerted by the first annular magnet 8, so that the sealing surface 31 thereof is always pressed against the second sealing ring 7 under normal conditions. In order to prevent the annular magnets from falling out of the annular grooves, rubber flat gaskets 13 for sealing are provided in the first annular groove 103 and the second annular groove 35, and the rubber flat gaskets 13 are interference fit with the annular grooves.

[0037] In addition to being used in the above-mentioned sewage lifting integrated equipment, the bidirectional balanced air pressure magnetic valve of the present invention is also used for indoor drainage of buildings. When the pressure in the pipeline is high, resulting in a slow sewage discharge speed, the exhaust valve 4 and the valve cover 41 rise and contact with the first sealing ring 6 to form a seal. When the force acting on the exhaust valve 4 is less than the weight of the exhaust valve 4 and the valve cover 41 themselves, the exhaust valve 4 and the valve cover 41 fall. When the force acting on the exhaust valve 4 and the valve cover 41 is again greater than the weight of the exhaust valve 4 and the valve cover 41 themselves, the exhaust valve 4 and the valve cover 41 will It rises and contacts the first sealing ring 6 again. During the process, a small amount of odorous air with a low flow rate will be completely absorbed by the deodorizing filler 12. Moreover, when the pressure in the pipeline is small and a siphon phenomenon may occur to destroy the water seal, external air enters the valve body 1 through the air hole 211. After passing through the deodorizing filler 12, it acts on the air inlet valve 3 to move the magnetic pole repulsion of the customer of the air inlet valve 3 downward, thereby passing through the flow channel 10 between the second sealing ring 7 and the sealing surface 31 of the air inlet valve 3, and entering the sewage pipe to replenish air, thereby balancing the air pressure in the pipeline.

[0038] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bidirectional balanced air pressure magnetic valve, characterized in that: The invention comprises a valve body (1), a top cover (2), and an intake valve (3) and an exhaust valve (4) arranged in the valve body (1); a bushing (5) is arranged in the valve body (1); two ends of the bushing (5) are respectively provided with a first sealing ring (6) and a second sealing ring (7); the top cover (2) covers the top of the valve body (1) and presses against the first sealing ring (6); the top cover (2) is provided with an air hole (211); a sealing surface (31) matching the second sealing ring (7) is arranged at the top of the intake valve (3); and the intake valve (3) is provided with a center hole (32) for and flow holes (33) arranged around the central hole (32); the lower part of the valve body (1) is provided with a side flow hole (101) connected with the flow hole (33); the exhaust valve (4) is movably arranged in the central hole (32); the top of the exhaust valve (4) is provided with a valve cover (41) matched with the first sealing ring (6); the bottom of the valve body (1) is provided with a first annular magnet (8); the bottom of the intake valve (3) is provided with a second annular magnet (9) with the same pole opposite to the first annular magnet (8); the valve body (1) has three states: closed, intake and exhaust; When the valve body (1) is in an intake state, the internal pressure of the device is lower than the external pressure, the intake valve (3) and the exhaust valve (4) are acted upon by the external pressure and overcome the magnetic pole repulsion between the first annular magnet (8) and the second annular magnet (9) to sink, and the sealing surface (31) of the intake valve (3) is separated from the second sealing ring (7) to form a flow channel (10), so that the air hole (211), the flow channel (10) and the side flow hole (101) are connected; When the valve body (1) is in a closed state, the internal pressure of the device is equal to the external pressure, the air inlet valve (3) is pressed against the second sealing ring (7) by the magnetic pole repulsion between the first annular magnet (8) and the second annular magnet (9), the air outlet valve (4) falls under the action of gravity and the valve cover (41) seals the air inlet valve (3), so that the air hole (211) is disconnected from the flow channel (10) and the side flow hole (101); When the valve body (1) is in the exhaust state, the internal pressure of the equipment is greater than the external pressure, and the valve cover (41) is acted upon by the internal pressure and rises, so that the side flow hole (101), the flow hole (33) and the air hole (211) are connected.

2. A bidirectional balanced air pressure magnetic valve according to claim 1, characterized in that: An annular step groove (34) is provided at the top of the air intake valve (3), a third sealing ring (11) is provided in the annular step groove (34), and when the valve body (1) is in a closed state and an air intake state, the valve cover (41) is sealed and pressed onto the third sealing ring (11).

3. A bidirectional balanced air pressure magnetic valve according to claim 2, characterized in that: The exhaust valve (4) is a round tube with a through bottom and a closed top.

4. A bidirectional balanced air pressure magnetic valve according to claim 3, characterized in that: The top cover (2) comprises an integrally formed limiting portion (21) and a plug-in portion (22); the air hole (211) is arranged on the limiting portion (21); the top end of the valve body (1) is provided with an outer edge (102) matching the limiting portion (21); the plug-in portion (22) is provided with an external thread; the top of the valve body (1) is provided with an internal thread matching the external thread; the bottom of the plug-in portion (22) is tightly pressed against the first sealing ring (6).

5. A bidirectional balanced air pressure magnetic valve according to claim 4, characterized in that: It also comprises a deodorizing filler (12), wherein the deodorizing filler (12) is filled in the cavity between the first sealing ring (6) and the limiting portion (21).

6. A bidirectional balanced air pressure magnetic valve according to any one of claims 1 to 5, characterized in that: The bottom of the valve body (1) is provided with a first annular groove (103) with an opening facing upward, and the bottom of the intake valve (3) is provided with a second annular groove (35) with an opening facing downward. The first annular magnet (8) and the second annular magnet (9) are respectively embedded in the first annular groove (103) and the second annular groove (35). Rubber flat pads for sealing are provided in the first annular groove (103) and the second annular groove (35).

7. A bidirectional balanced air pressure magnetic valve according to claim 1, characterized in that: The first sealing ring (6), the second sealing ring (7) and the third sealing ring (11) are all rubber rings.

Images