Low-flow-resistance magnetomotive one-way valve

Abstract

The utility model discloses a low-flow-resistance magnetomotive one-way valve, which relates to the technical field of valves and comprises a first valve body, a second valve body and a valve core, the first valve body at least comprises a first connecting pipeline, a first baffle and an inlet pipeline. The second valve body at least comprises a second connecting pipeline, a second baffle and an outlet pipeline; the valve element at least comprises a third baffle, a valve element pipeline provided with at least one circulation hole, an annular installation base and an annular blocking piece. The problems of a traditional one-way valve using a spring to drive a valve element are solved, gas-liquid flow resistance can be reduced, the design length of the one-way valve is reduced, and therefore the mass of the one-way valve is reduced, and fluid flow resistance can be reduced after the one-way valve is opened; the magnet is adopted to drive the valve element, the magnet is not prone to losing efficacy or reducing the magnetic quantity, the reliability of the one-way valve can be effectively improved, and the opening force of the one-way valve can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a low-flow-resistance magnetic one-way valve. BACKGROUND

[0002] A one-way valve is also called a check valve or a non-return valve, which is a kind of accessory used in a pipeline to realize the function of one-way cutoff of medium, and can make the medium flow in one direction in the pipeline and cannot flow back, for example, the one-way valve is applied to a hydraulic system, which can prevent the oil from flowing in the reverse direction; the one-way valve is applied to a pneumatic system, which can prevent the compressed air from flowing in the reverse direction.

[0003] The traditional one-way valve controls the flow direction of the medium and realizes one-way sealing by driving the valve core by a spring. However, the spring arranged in the one-way valve increases the design length of the one-way valve, thereby increasing the mass of the one-way valve. In the use process, the spring in the one-way valve increases the gas-liquid flow resistance, is easy to adsorb impurities in the fluid medium and cause the one-way valve to be stuck and fail to open; the spring in the one-way valve is also easy to fail or reduce elasticity due to frequent vibration under work. In the long-term storage process, the spring in the one-way valve is easy to cause phenomena such as spring failure, spring corrosion and solidification, and spring displacement leading to spring failure, thereby causing the one-way valve to fail in function, fail to open, fail to close tightly, or fail to close, and other adverse risks.

[0004] Therefore, it is necessary to propose a new low-flow-resistance magnetic one-way valve to solve the problems of the traditional one-way valve and ensure that the fluid flow resistance can be reduced after opening. CONTENT OF THE INVENTION

[0005] The present application aims to provide a low-flow-resistance magnetic one-way valve, which solves the problems of the traditional one-way valve using a spring to drive the valve core, can reduce the gas-liquid flow resistance, reduce the design length of the one-way valve, thereby reducing the mass of the one-way valve, and can reduce the fluid flow resistance after opening; the valve core is driven by a magnet, the magnet is not easy to fail or reduce the magnetic amount, can effectively improve the reliability of the one-way valve, and accurately control the opening degree of the one-way valve.

[0006] To achieve the above object, the application provides a low-flow-resistance magnetic one-way valve, comprising a first valve body, a second valve body and a valve core; wherein the first valve body comprises at least a first connecting pipeline, a first baffle and an inlet pipeline; one end of the first connecting pipeline is connected with one side of the first baffle; one end of the inlet pipeline is connected with the other side of the first baffle; an inlet through hole is formed in the first baffle, and the inlet pipeline and the first connecting pipeline are communicated through the inlet through hole; the second valve body comprises at least a second connecting pipeline, a second baffle and an outlet pipeline; one end of the second connecting pipeline is connected with one side of the second baffle; the other end of the second connecting pipeline is detachably connected with the other end of the first connecting pipeline, and after the connection, the first valve body and the second valve body form a valve body shell with a containing cavity; one end of the outlet pipeline is connected with the other side of the second baffle; an outlet through hole is formed in the second baffle, and the outlet pipeline and the second connecting pipeline are communicated through the outlet through hole; a first magnet is arranged on one side of the second baffle, and the first magnet is located between the outlet through hole and the second connecting pipeline; the valve core comprises at least a third baffle, a valve core pipeline provided with at least one flow-through hole, an annular mounting seat and an annular baffle piece; the diameter of the third baffle is greater than the diameter of the inlet through hole; the diameter of the third baffle is smaller than the diameter of the containing cavity; the diameter of the annular mounting seat is greater than the diameter of the outlet pipeline, and the diameter of the annular mounting seat is smaller than the diameter of the containing cavity; the diameter of the annular mounting seat is greater than the diameter of the third baffle; the diameter of the annular baffle piece is smaller than the diameter of the outlet through hole; the length of the annular baffle piece is equal to the length of the outlet through hole; one side of the third baffle is connected with one end of the valve core pipeline; one side of the annular mounting seat is connected with the other end of the valve core pipeline; a second magnet is arranged on the other side of the annular mounting seat; one end of the annular baffle piece is connected with the other side of the annular mounting seat, and the annular baffle piece is aligned with the valve core pipeline; the valve core is slidingly arranged in the containing cavity, and the other side of the third baffle faces the inlet through hole, the side of the annular mounting seat where the second magnet is arranged faces the outlet through hole, and the side of the second magnet facing the first magnet is of the same polarity as the side of the first magnet facing the second magnet; when the first magnet and the second magnet generate repulsion, and no pressure difference is generated between the inlet through hole and the outlet through hole, the valve core moves towards the inlet through hole, and the other side of the third baffle is attached to one side of the first baffle, so as to close the inlet through hole; when the first magnet and the second magnet generate repulsion, and the pressure at the inlet through hole is greater than the repulsion, the valve core moves away from the inlet through hole, the other side of the third baffle is separated from one side of the first baffle, the first magnet and the second magnet are in contact, and the outer side of the annular baffle piece is in contact with the inner side of the outlet through hole; the other end of the annular baffle piece is in contact with a part of one end of the outlet pipeline.

[0007] As above, wherein the diameter of the annular baffle piece is equal to the diameter of the valve core pipeline, and the diameter of the annular baffle piece is equal to the diameter of the outlet pipeline.

[0008] The other side of the third baffle is provided with a first sealing ring, when the first magnet and the second magnet generate repulsion, and no pressure difference is generated between the inlet through hole and the outlet through hole, the valve core moves towards the inlet through hole, the first sealing ring is attached to one side of the first baffle, thereby closing the inlet through hole.

[0009] The other side of the third baffle is provided with a first sealing groove, and the first sealing ring is arranged in the first sealing groove.

[0010] The outer side of the valve core pipeline is provided with a plurality of guide protrusions, and the plurality of guide protrusions are uniformly and circularly arranged with the axis of the valve core pipeline as the center line.

[0011] The through hole is an inclined hole with an inclined angle; the through hole is a plurality of through holes, and the plurality of through holes are uniformly and circularly arranged with the axis of the valve core pipeline as the center line.

[0012] The first valve body further comprises a sealing pipeline; the sealing pipeline is arranged in the first connecting pipeline, one end of the sealing pipeline is connected to one side of the first baffle, the sealing pipeline is aligned with the inlet through hole, the diameter of the sealing pipeline is equal to the diameter of the inlet through hole; when the first magnet and the second magnet generate repulsion, and no pressure difference is generated between the inlet through hole and the outlet through hole, the valve core moves towards the inlet through hole, the first sealing ring is attached to the other end of the sealing pipeline, thereby closing the inlet through hole.

[0013] The other end of the first connecting pipeline is provided with an external thread; the inner side of the other end of the second connecting pipeline is provided with an internal thread matched with the external thread.

[0014] The second baffle is provided with a second sealing ring, and the second sealing ring is arranged between the first magnet and the second connecting pipeline; when the other end of the second connecting pipeline is connected to the other end of the first connecting pipeline, the other end of the first connecting pipeline is in contact with the second sealing ring.

[0015] The other end of the first connecting pipeline is provided with a second sealing groove matched with the second sealing ring; when the other end of the second connecting pipeline is connected to the other end of the first connecting pipeline, the second sealing groove and the second sealing ring are matched with each other, thereby realizing sealing.

[0016] The beneficial effects realized by the present application are as follows:

[0017] (1) The low-flow-resistance magnetic one-way valve of the present application adopts a magnet to drive the valve core, the magnet is not easy to fail or reduce the magnetic amount, and the reliability of the one-way valve can be effectively improved.

[0018] (2) The low flow resistance magnetic one-way valve of the present application uses a magnet to drive the valve core, and can accurately control the opening degree of the one-way valve by controlling the magnetization amount and / or the volume of the magnet.

[0019] (3) After the low flow resistance magnetic one-way valve of the present application is opened, the annular baffle can reduce the flow resistance of the fluid.

[0020] (4) The low flow resistance magnetic one-way valve of the present application solves the problems of traditional one-way valves using a spring to drive the valve core, can reduce the gas-liquid flow resistance, reduce the design length of the one-way valve, and thus reduce the mass of the one-way valve.

[0021] (5) Under the same specification conditions, the low flow resistance magnetic one-way valve of the present application has lower mass than the traditional spring one-way valve, and thus the application of the low flow resistance magnetic one-way valve of the present application to a carrier rocket can improve the rocket carrying coefficient. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0023] Figure 1 It is a perspective view of an embodiment of the low flow resistance magnetic one-way valve;

[0024] Figure 2 It is a sectional view of an embodiment of the low flow resistance magnetic one-way valve;

[0025] Figure 3 It is a sectional view of an embodiment of the first valve body;

[0026] Figure 4 It is a perspective view of an embodiment of the second valve body;

[0027] Figure 5 It is a sectional view of an embodiment of the second valve body;

[0028] Figure 6 It is a sectional view of an embodiment of the valve core;

[0029] Figure 7 It is a perspective view of an embodiment of the valve core. DETAILED DESCRIPTION

[0030] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] As Figures 1-7As shown, the application provides a low flow resistance magnetic one-way valve, comprising: a first valve body 1, a second valve body 2 and a valve core 3. Wherein the first valve body 1 at least comprises: a first connecting pipeline 11, a first baffle 12 and an inlet pipeline 13; one end of the first connecting pipeline 11 is connected with one side of the first baffle 12; one end of the inlet pipeline 13 is connected with the other side of the first baffle 12; an inlet through hole is formed on the first baffle 12, and the inlet pipeline 13 and the first connecting pipeline 11 are communicated through the inlet through hole. The second valve body 2 at least comprises: a second connecting pipeline 21, a second baffle 22 and an outlet pipeline 23; one end of the second connecting pipeline 21 is connected with one side of the second baffle 22; the other end of the second connecting pipeline 21 is detachably connected with the other end of the first connecting pipeline 11, after connection, the first valve body 1 and the second valve body 2 constitute a valve body shell with a containing cavity 4; one end of the outlet pipeline 23 is connected with the other side of the second baffle 22; an outlet through hole is formed on the second baffle 22, and the outlet pipeline 23 and the second connecting pipeline 21 are communicated through the outlet through hole; a first magnet 24 is arranged on one side of the second baffle 22, and the first magnet 24 is located between the outlet through hole and the second connecting pipeline 21. The valve core 3 at least comprises: a third baffle 31, a valve core pipeline 32 provided with at least one flow through hole 321, an annular mounting seat 33 and an annular baffle 34; the diameter of the third baffle 31 is greater than the diameter of the inlet through hole; the diameter of the third baffle 31 is smaller than the diameter of the containing cavity 4; the diameter of the annular mounting seat 33 is greater than the diameter of the outlet pipeline 23, and the diameter of the annular mounting seat 33 is smaller than the diameter of the containing cavity 4; the diameter of the annular mounting seat 33 is greater than the diameter of the third baffle 31; the diameter of the annular baffle 34 is smaller than the diameter of the outlet through hole; the length of the annular baffle 34 is equal to the length of the outlet through hole; one side of the third baffle 31 is connected with one end of the valve core pipeline 32; one side of the annular mounting seat 33 is connected with the other end of the valve core pipeline 32; the other side of the annular mounting seat 33 is provided with a second magnet 35. One end of the annular baffle 34 is connected with the other side of the annular mounting seat 33, and the annular baffle 34 is aligned with the valve core pipeline 32. The valve core 3 is slidingly arranged in the containing cavity 4, and the other side of the third baffle 31 faces the inlet through hole, the side of the annular mounting seat 33 provided with the second magnet 35 faces the outlet through hole, and the side of the second magnet 35 facing the first magnet 24 and the side of the first magnet 24 facing the second magnet 35 are same polarity. When the first magnet 24 and the second magnet 35 generate repulsion, and no pressure difference is generated between the inlet through hole and the outlet through hole, the valve core 3 moves towards the inlet through hole, and the other side of the third baffle 31 is attached to one side of the first baffle 12, thereby closing the inlet through hole.When the first magnet 24 and the second magnet 35 generate repulsion, and the pressure at the inlet through hole is greater than the repulsion, the valve core 3 moves away from the inlet through hole, the other side of the third baffle 31 is separated from one side of the first baffle 12, the first magnet 24 and the second magnet 35 are in contact, and the outer side of the annular baffle 34 is in contact with the inner side of the outlet through hole; the other end of the annular baffle 34 is in contact with a part of one end of the outlet pipeline.

[0032] Specifically, when the valve core 3 is opened, the medium will enter between the second magnet 35 and the first magnet 24, and after the valve core 3 is opened for the second time, the medium will flow out from between the second magnet 35 and the first magnet 24. When the low-flow-resistance magnetic one-way valve is opened, under the action of the annular baffle 34, the medium flowing will not be disturbed by the cavity between the second magnet 35 and the first magnet 24, and the fluid flow resistance after the low-flow-resistance magnetic one-way valve is opened can be effectively reduced. In addition, since the diameter of the annular baffle 34 is smaller than the diameter of the outlet through hole, when the annular baffle 34 is butt jointed with the outlet through hole, the medium (for example, gas-liquid) between the first magnet 24 and the second magnet 35 can be discharged, and the fluid flow resistance after the low-flow-resistance magnetic one-way valve is opened can be effectively reduced.

[0033] Among them, the annular mounting seat 33 has a guiding function, which can effectively avoid the shaking of the valve core 3 in the radial direction of the valve core pipeline 32 when the valve core 3 moves.

[0034] Specifically, as an embodiment, the side of the second magnet 35 facing the first magnet 24 is S pole, and the side of the first magnet 24 facing the second magnet 35 is S pole.

[0035] As another embodiment, the side of the second magnet 35 facing the first magnet 24 is N pole, and the side of the first magnet 24 facing the second magnet 35 is N pole.

[0036] Further, the specific values of the diameter of the inlet pipeline 13, the diameter of the inlet through hole, the diameter of the first connecting pipeline 11, the diameter of the outlet pipeline 23, the diameter of the outlet through hole and the diameter of the second connecting pipeline 21 are set according to actual conditions. The present application preferably has: the diameter of the inlet pipeline 13 is equal to the diameter of the inlet through hole, and the diameter of the first connecting pipeline 11 is greater than the diameter of the inlet through hole. The diameter of the outlet pipeline 23 is smaller than the diameter of the outlet through hole, and the diameter of the second connecting pipeline 21 is greater than the diameter of the outlet through hole.

[0037] Further, the first valve body 1 is a one-piece structure or a separate structure, and the present application preferably has a one-piece structure.

[0038] Further, the second valve body 2 is a one-piece structure or a separate structure, and the present application preferably has a one-piece structure.

[0039] Further, the valve core 3 is a one-piece structure or a separate structure, and the present application preferably has a one-piece structure.

[0040] Further, the diameter of the annular baffle 34 is equal to the diameter of the valve core channel, and the diameter of the annular baffle 34 is equal to the diameter of the outlet channel.

[0041] Further, the other side of the annular mounting seat 33 is provided with a magnet groove, and the second magnet 35 is arranged in the magnet groove.

[0042] Further, the other side of the third baffle 31 is provided with a first sealing ring 311, when the first magnet 24 and the second magnet 35 generate repulsive force, and no pressure difference is generated between the inlet through hole and the outlet through hole, the valve core 3 moves towards the inlet through hole, and the first sealing ring 311 is attached to one side of the first baffle 12, thereby closing the inlet through hole.

[0043] Further, the other side of the third baffle 31 is provided with a first sealing groove, and the first sealing ring 311 is arranged in the first sealing groove.

[0044] Further, as shown in Figure 2 , Figure 6 and Figure 7 , the outer side of the valve core channel 32 is provided with a plurality of guide protrusions 322.

[0045] Specifically, the annular mounting seat 33 and the guide protrusion 322 jointly play a guiding role, which can further improve the stability of the valve core 3 during movement.

[0046] The specific arrangement mode of the plurality of guide protrusions 322 is determined according to actual conditions, and the application is preferably: the plurality of guide protrusions 322 are arranged in a circumferential uniform interval with the axis of the valve core channel 32 as the center line.

[0047] Specifically, the guide protrusion 322 can effectively avoid the valve core 3 from shaking in the radial direction of the valve core channel 32 when moving.

[0048] Further, the specific number of guide protrusions 322 is set according to actual conditions, and the application is preferably: the guide protrusions 322 are four.

[0049] Further, the specific position of the guide protrusion 322 is set according to actual conditions, and the application is preferably: the guide protrusion 322 is located on the outer side of one end of the valve core channel 32 connected with the third baffle 31.

[0050] Further, the flow-through hole 321 is a plurality of flow-through holes. The specific arrangement mode of the plurality of flow-through holes 321 is determined according to actual conditions, and the application is preferably: the plurality of flow-through holes 321 are arranged in a circumferential uniform interval with the axis of the valve core channel 32 as the center line.

[0051] Further, the specific number of flow holes 321 is set according to actual conditions, and the application is preferably that the flow holes 321 are four.

[0052] Further, the flow holes 321 are inclined holes with an inclination angle, which can guide the medium to flow along a specific path, thereby optimizing the medium distribution in the magnetic check valve.

[0053] Specifically, the specific value of the inclination angle of the flow hole 321 is set according to actual conditions.

[0054] Further, as shown in Figure 2 and Figure 3 , the first valve body 1 further comprises a sealing pipe 14; the sealing pipe 14 is located in the first connecting pipe 11, one end of the sealing pipe 14 is connected to one side of the first baffle 12, and the sealing pipe 14 is aligned with the inlet through hole, the diameter of the sealing pipe 14 is equal to the diameter of the inlet through hole; when the first magnet 24 and the second magnet 35 generate repulsive force, and no pressure difference is generated between the inlet through hole and the outlet through hole, the valve core 3 moves towards the inlet through hole, and the first sealing ring 311 is attached to the other end of the sealing pipe 14, thereby closing the inlet through hole.

[0055] Specifically, the sealing pipe 14 cooperates with the first sealing ring 311 to improve the sealing effect.

[0056] Further, as shown in Figures 2-5 , the other end of the first connecting pipe 11 is provided with an external thread 111; the inner side of the other end of the second connecting pipe 21 is provided with an internal thread 211 matched with the external thread 111.

[0057] Specifically, the first connecting pipe 11 and the second connecting pipe 21 are connected by a threaded connection mode, but are not limited to the threaded connection mode, and the application preferably adopts the threaded connection mode.

[0058] Further, the second baffle 22 is provided with a second sealing ring 221, and the second sealing ring 221 is located between the first magnet 24 and the second connecting pipe 21; after the other end of the second connecting pipe 21 is connected to the other end of the first connecting pipe 11, the other end of the first connecting pipe 11 is in contact with the second sealing ring 221.

[0059] Specifically, the second sealing ring 221 can improve the sealing effect.

[0060] Further, the other end of the first connecting pipe 11 away from the first baffle 12 is provided with a second sealing groove 113 matched with the second sealing ring 221; after the other end of the second connecting pipe 21 is connected to the other end of the first connecting pipe 11, the second sealing groove 113 cooperates with the second sealing ring 221, thereby realizing sealing.

[0061] Further, the first magnet 24 is a permanent magnet or a rare earth magnet, but is not limited to a permanent magnet or a rare earth magnet.

[0062] Specifically, the magnet thickness, volume and magnetization strength of the first magnet 24 can be set according to different opening pressures of the one-way valve.

[0063] Further, the second magnet 35 is a permanent magnet or a rare earth magnet, but is not limited to a permanent magnet or a rare earth magnet.

[0064] Specifically, the magnet thickness, volume and magnetization strength of the second magnet 35 can be set according to different opening pressures of the one-way valve.

[0065] Further, the outer side of one end of the first connecting pipeline 11 connected with the first baffle 12 is provided with a first protrusion 112, facilitating connection operation.

[0066] Further, the outer side of one end of the second connecting pipeline 21 connected with the second baffle 22 is provided with a second protrusion 212, facilitating connection operation.

[0067] The beneficial effects achieved by the present application are as follows:

[0068] (1) The low-flow-resistance magnetic one-way valve of the present application uses a magnet to drive the valve core, and the magnet is not prone to failure or reduction in magnetic quantity, which can effectively improve the reliability of the one-way valve.

[0069] (2) The low-flow-resistance magnetic one-way valve of the present application uses a magnet to drive the valve core, and the magnet can be controlled in terms of magnetization quantity and / or magnet volume, so as to accurately control the opening degree of the one-way valve.

[0070] (3) After the low-flow-resistance magnetic one-way valve of the present application is opened, the annular baffle can reduce the flow resistance of the fluid.

[0071] (4) The low-flow-resistance magnetic one-way valve of the present application solves the problems of the traditional one-way valve using a spring to drive the valve core, and can reduce the gas-liquid flow resistance, the design length of the one-way valve, and thus the mass of the one-way valve.

[0072] (5) Under the same specification condition, the low-flow-resistance magnetic one-way valve of the present application has a lower mass than the traditional spring one-way valve, and therefore, when the low-flow-resistance magnetic one-way valve of the present application is applied to a carrier rocket, the carrying coefficient of the rocket can be improved.

[0073] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they have the benefit of the foregoing description without departing from the spirit and scope of the application. Accordingly, it is intended that the scope of the application be governed solely by the appended claims and their equivalents. Obviously, many modifications and variations of this application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A low-flow-resistance magnetically actuated check valve, characterized in that, include: First valve body, second valve body, and valve core; The first valve body includes at least: a first connecting pipe, a first baffle, and an inlet pipe; One end of the first connecting pipe is connected to one side of the first baffle; One end of the inlet pipe is connected to the other side of the first baffle. The first baffle is provided with an inlet through hole, through which the inlet pipe and the first connecting pipe are connected; The second valve body includes at least: a second connecting pipe, a second baffle, and an outlet pipe; One end of the second connecting pipe is connected to one side of the second baffle; the other end of the second connecting pipe is detachably connected to the other end of the first connecting pipe. After connection, the first valve body and the second valve body constitute a valve body shell with a receiving cavity. One end of the outlet pipe is connected to the other side of the second baffle. The second baffle is provided with an outlet through hole, through which the outlet pipe and the second connecting pipe are connected; A first magnet is provided on one side of the second baffle, and the first magnet is located between the outlet through hole and the second connecting pipe. The valve core includes at least: a third baffle, a valve core pipe with at least one flow hole, an annular mounting seat, and an annular baffle; the diameter of the third baffle is larger than the diameter of the inlet through hole; the diameter of the third baffle is smaller than the diameter of the receiving cavity; the diameter of the annular mounting seat is larger than the diameter of the outlet pipe, and the diameter of the annular mounting seat is smaller than the diameter of the receiving cavity; the diameter of the annular mounting seat is larger than the diameter of the third baffle; the diameter of the annular baffle is smaller than the diameter of the outlet through hole; the length of the annular baffle is equal to the length of the outlet through hole. One side of the third baffle is connected to one end of the valve core pipe; One side of the annular mounting base is connected to the other end of the valve core pipeline; a second magnet is provided on the other side of the annular mounting base; One end of the annular baffle is connected to the other side of the annular mounting base, and the annular baffle is aligned with the valve core pipe; The valve core is slidably disposed in the receiving cavity, and the other side of the third baffle faces the inlet through hole. The side of the annular mounting seat where the second magnet is disposed faces the outlet through hole. The side of the second magnet facing the first magnet has the same pole as the side of the first magnet facing the second magnet. When the first magnet and the second magnet generate a repulsive force, and there is no pressure difference between the inlet and outlet through holes, the valve core moves towards the inlet through hole, and the other side of the third baffle fits against one side of the first baffle, thereby closing the inlet through hole. When the first magnet and the second magnet generate a repulsive force, and the pressure at the inlet through hole is greater than the repulsive force, the valve core moves away from the inlet through hole, the other side of the third baffle separates from one side of the first baffle, the first magnet and the second magnet come into contact, the outer side of the annular baffle comes into contact with the inner side of the outlet through hole, and the other end of the annular baffle comes into contact with a part of one end of the outlet pipe.

2. The low-flow-resistance magnetic check valve according to claim 1, characterized in that, The diameter of the annular baffle is equal to the diameter of the valve core pipe, and the diameter of the annular baffle is equal to the diameter of the outlet pipe.

3. The low-flow-resistance magnetic check valve according to claim 1, characterized in that, A first sealing ring is provided on the other side of the third baffle. When the first magnet and the second magnet generate a repulsive force and there is no pressure difference between the inlet and outlet through holes, the valve core moves towards the inlet through hole, and the first sealing ring fits against one side of the first baffle, thereby closing the inlet through hole.

4. The low-flow-resistance magnetic check valve according to claim 3, characterized in that, A first sealing groove is provided on the other side of the third baffle, and a first sealing ring is disposed in the first sealing groove.

5. The low-flow-resistance magnetic check valve according to claim 1, characterized in that, Multiple guide protrusions are provided on the outer side of the valve core pipe, and the multiple guide protrusions are evenly spaced in a circle with the axis of the valve core pipe as the center line.

6. The low-flow-resistance magnetic check valve according to claim 1, characterized in that, The flow hole is an inclined hole with an angle; there are multiple flow holes, which are evenly spaced in a circle with the axis of the valve core pipe as the center line.

7. The low-flow-resistance magnetic check valve according to claim 4, characterized in that, The first valve body also includes: a sealing pipe; the sealing pipe is located inside the first connecting pipe, one end of the sealing pipe is connected to one side of the first baffle, and the sealing pipe is aligned with the inlet through hole, and the diameter of the sealing pipe is equal to the diameter of the inlet through hole; When the first magnet and the second magnet generate a repulsive force, and there is no pressure difference between the inlet and outlet through holes, the valve core moves towards the inlet through hole, and the first sealing ring fits against the other end of the sealing pipe, thereby closing the inlet through hole.

8. The low-flow-resistance magnetic check valve according to claim 1, characterized in that, The other end of the first connecting pipe is provided with an external thread; The other end of the second connecting pipe is provided with an internal thread that is compatible with the external thread.

9. The low-flow-resistance magnetic check valve according to claim 1, characterized in that, A second sealing ring is provided on the second baffle, and the second sealing ring is located between the first magnet and the second connecting pipe. When the other end of the second connecting pipe is connected to the other end of the first connecting pipe, the other end of the first connecting pipe comes into contact with the second sealing ring.

10. The low-flow-resistance magnetic check valve according to claim 9, characterized in that, The end of the first connecting pipe away from the first baffle is provided with a second sealing groove that is compatible with the second sealing ring. When the other end of the second connecting pipe is connected to the other end of the first connecting pipe, the second sealing groove and the second sealing ring cooperate with each other to achieve a seal.

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