Check valve

Abstract

The utility model discloses a check valve which is characterized in that a shell is adopted, and a water inlet, a water outlet and a water flowing channel are formed in the shell; a mounting seat of the non-return mechanism is arranged in a water flowing channel and provided with a sliding connecting hole and a water passing channel communicating with the water flowing channel and a water inlet, a valve rod is slidably inserted into the sliding connecting hole, a valve element is connected to the end of the valve rod, a first magnetic part is connected to the mounting seat and annularly arranged on the outer side of the valve rod, and a second magnetic part is connected to the valve rod. And the first magnetic part and the second magnetic part are coaxially arranged. According to the check valve, through the magnetic action of the first magnetic part and the second magnetic part, the situation that the valve element leaks due to mechanical fatigue can be effectively avoided, and the service life of the check valve is further prolonged. Meanwhile, the first magnetic part and the second magnetic part are coaxially arranged, so that the stress of the valve rod is more balanced, the valve element can more uniformly abut against and be attached to the water passing channel, and the sealing performance of the check valve is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to water supply equipment technical field, especially a check valve. BACKGROUND

[0002] In the related art, the resistance force of the valve core plugging the passage is usually provided by a spring, but due to its own mechanical properties, it is easy to cause the force imbalance of the valve core, and leakage occurs, and the deformation caused by mechanical fatigue after long-term use also makes the spring force smaller, so that the valve core cannot better plug the passage, resulting in leakage of the check valve and shortening of the service life. SUMMARY

[0003] The main purpose of the utility model is to provide a check valve, which aims to improve its sealing performance and service life.

[0004] To achieve the above-mentioned purpose, the check valve provided by the utility model comprises:

[0005] An outer shell is formed with a water inlet, a water outlet and a water flow passage; and

[0006] A check mechanism comprises a mounting seat, a valve core, a valve rod, a first magnetic part and a second magnetic part, the mounting seat is arranged in the water flow passage and is provided with a sliding connection hole and a water passage connecting the water flow passage and the water inlet, the valve rod is slidably inserted into the sliding connection hole, the valve core is connected to the end of the valve rod, the first magnetic part is connected to the mounting seat and is annularly arranged on the outer side of the valve rod, and the second magnetic part is connected to the valve rod and is coaxially arranged with the first magnetic part.

[0007] The first magnetic part and the second magnetic part provide magnetic force to make the valve core plug the water passage.

[0008] In an optional embodiment, the mounting seat is provided with an annular mounting groove communicating with the sliding connection hole, and the first magnetic part is embedded in the annular mounting groove.

[0009] An end of the valve rod away from the valve core is provided with a clamping groove, and the second magnetic part is embedded in the clamping groove.

[0010] In an optional embodiment, the valve core is formed with a connected guide surface and plugging surface, the guide surface extends in a semispherical shape and protrudes towards the water inlet side, and the plugging surface is continuously arranged along the circumference of the guide surface and can be attached to the opening of the water passage.

[0011] In an optional embodiment, the check mechanism comprises a first sealing ring, the first sealing ring is annularly arranged at the opening of the water passage, and the plugging surface can elastically abut against the first sealing ring.

[0012] In an alternative embodiment, the first sealing ring is provided in a trumpet shape towards one side of the valve core.

[0013] In an alternative embodiment, the shell comprises a main housing, a water inlet pipe, a water outlet pipe, a water inlet end cover and a water outlet end cover, the main housing forms the water flow channel, the water inlet pipe and the water outlet pipe are arranged on opposite sides of the main housing and are respectively provided with the water inlet and the water outlet, the water inlet end cover is detachably connected to the main housing and the water inlet pipe, the water outlet end cover is detachably connected to the main housing and the water outlet pipe, and the mounting seat is detachably connected to the main housing.

[0014] In an alternative embodiment, the water inlet end cover and the main housing are threadedly connected, and the water inlet pipe is pressed at the end of the main housing;

[0015] The water outlet end cover and the main housing are threadedly connected, and the water outlet pipe is pressed at the end of the main housing;

[0016] In an alternative embodiment, the main housing is made of transparent material.

[0017] In an alternative embodiment, the check valve further comprises a second sealing ring, the second sealing ring is connected to the water inlet and is provided with a sealing groove, and the end of the mounting seat is elastically embedded in the sealing groove.

[0018] In an alternative embodiment, the check valve further comprises a third sealing ring, the main housing is recessed to form a clamping groove towards the water outlet side, the third sealing ring is embedded in the clamping groove and elastically abuts against the water outlet pipe.

[0019] The technical scheme of the utility model discloses a shell, the shell is formed with a water inlet, a water outlet and a water flow channel, a mounting seat of a check mechanism is arranged in the water flow channel and is provided with a sliding connection hole and a water passing channel communicating the water flow channel and the water inlet, a valve rod is slidably inserted into the sliding connection hole, a valve core is connected to the end of the valve rod, a first magnetic member is connected to the mounting seat and is annularly arranged on the outer side of the valve rod, and a second magnetic member is connected to the valve rod and is coaxially arranged with the first magnetic member.

[0020] The check valve of the present application is in a natural state, the first magnetic member and the second magnetic member provide magnetic force, so that the valve core blocks the water passage, that is, the principle of repulsion of the same sex of the first magnetic member and the second magnetic member is used to block the valve core in the water passage. In use, the water flow enters the water passage from the water inlet, under the impact force of the water flow, the valve rod slides in the sliding connection hole towards the outlet side, the valve core overcomes the magnetic force and opens the water passage, the water flow enters the water passage and flows out from the outlet, after the water flow stops, the valve core is blocked under the action of the magnetic force. In the present application, the magnetic force of the first magnetic member and the second magnetic member can effectively avoid the leakage of the valve core caused by mechanical fatigue, and further improve the service life of the check valve. At the same time, the first magnetic member and the second magnetic member are coaxially arranged, so that the stress of the valve rod is more balanced, and the valve core can be more uniformly abutted and fitted in the water passage, so that the sealing performance of the check valve is better. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in the drawings without creating any creative labor.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the check valve of the present application.

[0023] Figure 2 It is a structural exploded view of the check valve shown in the figure. Figure 1

[0024] Figure 3 It is a top view of the check valve shown in the figure. Figure 1

[0025] Figure 4 It is a sectional view of the check valve along IV-IV direction shown in the figure. Figure 3

[0026] Figure 5 It is a detail enlarged view of A in the figure. Figure 4

[0027] Explanation of reference numerals:

[0028]

[0029]

[0030] The implementation, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. ​​​​DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0033] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0034] Referring to Figures 1 to 5 The utility model provides a check valve 100.

[0035] In the embodiments of the present application, the check valve 100 comprises: a housing formed with a water inlet 12a, a water outlet 13a and a water flow channel 11a; a check mechanism comprising a mounting seat 21, a valve core 22, a valve rod 23, a first magnetic member 24 and a second magnetic member 25, the mounting seat 21 is arranged in the water flow channel 11a and is provided with a sliding connection hole 21b and a water passage 21a communicating the water flow channel 11a and the water inlet 12a, the valve rod 23 is slidably inserted into the sliding connection hole 21b, the valve core 22 is connected to the end of the valve rod 23, the first magnetic member 24 is connected to the mounting seat 21 and is annularly arranged on the outer side of the valve rod 23, and the second magnetic member 25 is connected to the valve rod 23 and is coaxially arranged with the first magnetic member 24; the first magnetic member 24 and the second magnetic member 25 provide magnetic force to make the valve core 22 block the water passage 21a.

[0036] Specifically, in the present embodiment, the housing includes a main housing 11, a water inlet pipe 12, a water outlet pipe 13, a water inlet end cover 14 and a water outlet end cover 15, wherein the above components can be formed by plastic or metal material. In the present application, the material of the main housing 11 is transparent material, for example: transparent plastic, acrylic or glass, etc. The main housing 11 is transparent material, which can facilitate the observation of the water flow. The main housing 11 is a cylindrical cavity structure, which forms a water flow channel 11a, and the outer sides of the opposite sides thereof form external threads. The water inlet end cover 14 and the water outlet end cover 15 form internal threads matched with the external threads. The bottoms of the water outlet pipe 13 and the water inlet pipe 12 respectively form abutting flanges (not shown in the figure). The water inlet end cover 14 and the water outlet end cover 15 are threadedly connected to the opposite sides of the main housing 11, and the water inlet end cover 14 and the water outlet end cover 15 respectively abut against the abutting flanges, thereby connecting the water inlet pipe 12 and the water outlet pipe 13 with the main housing 11. The water inlet 12a formed on the water inlet pipe 12 and the water outlet 13a formed on the water outlet pipe 13 are respectively connected with the water flow channel 11a. In the present application, the water outlet end cover 15 and the water inlet end cover 14 are detachably connected to the main housing 11 through the threaded structure, and the water outlet pipe 13 and the water inlet pipe 12 are fixed with the main housing 11. The structure is simple, and facilitates production, assembly, disassembly and maintenance. Of course, the water outlet end cover 15 and the water inlet end cover 14 can also be connected with the main housing 11 by using buckles, screws, pins, etc., which are not specifically limited herein.

[0037] The mounting seat 21 of the check mechanism can also be formed by plastic or metal material, and is arranged in the water flow channel 11a and connected with the main housing 11 through threads. The mounting seat 21 in the cavity structure forms a water passing channel 21a connected with the water flow channel 11a and the water inlet 12a, and forms a sliding connection hole 21b for mounting the valve rod 23. The valve core 22 and the valve rod 23 are integrally formed, and the valve rod 23 is inserted into the sliding connection hole 21b. Under the action of external force, the valve rod 23 can slide in the sliding connection hole 21b to drive the valve core 22 to move towards or away from the side of the water inlet pipe 12. The first magnetic member 24 and the second magnetic member 25 are made of permanent magnet, wherein the first magnetic member 24 is circular ring-shaped and connected with the mounting seat 21, and is annularly arranged outside the valve rod 23. The second magnetic member 25 is cylindrical and connected with the valve rod 23. The central axes of the first magnetic member 24 and the second magnetic member 25 coincide, i.e. they are coaxially arranged.

[0038] The check valve 100 of the present application is in a natural state, the first magnetic member 24 and the second magnetic member 25 provide magnetic force, so that the valve core 22 blocks the water passage 21a, that is, by using the principle of repulsion of the same sex of the first magnetic member 24 and the second magnetic member 25, the valve core 22 is blocked in the water passage 21a. In use, the water flow enters the water passage 21a from the water inlet 12a, under the impact force of the water flow, the valve rod 23 slides in the sliding connection hole 21b towards the side of the water outlet 13a, the valve core 22 overcomes the magnetic force to open the water passage 21a, the water flow enters the water flow passage 11a and then flows out from the water outlet 13a, after the water flow stops, the valve core 22 is re-blocked in the water passage 21a under the action of the magnetic force. In the present application, the magnetic force of the first magnetic member 24 and the second magnetic member 25 can effectively avoid the leakage of the valve core 22 caused by mechanical fatigue, further improving the service life of the check valve 100. At the same time, the first magnetic member 24 and the second magnetic member 25 are coaxially arranged, so that the stress of the valve rod 23 is more balanced, and the valve core 22 can be more uniformly abutted and fitted to the water passage 21a, so that the sealing performance of the check valve 100 is better.

[0039] Further, in the present application, the check valve 100 further comprises a second sealing ring 27 and a third sealing ring 28, specifically, the second sealing ring 27 and the third sealing ring 28 are formed by silica gel or rubber material, wherein the second sealing ring 27 can be connected with the main shell 11 by glue bonding or one-piece forming, the second sealing ring 27 is annularly arranged on the opening of the water inlet 12a, and is formed with an annularly extending sealing groove 27a, and the end part of the mounting seat 21 is elastically embedded in the sealing groove 27a after the mounting seat 21 is connected with the main shell 11, so that the connection between the two is more tight. Similarly, the side of the main shell 11 towards the water outlet 13a, that is, the side of the water outlet pipe 13 is recessed to form an annularly extending clamping groove 11b, and the third sealing ring 28 is embedded in the clamping groove 11b, and is elastically abutted with the water outlet pipe 13 after the water outlet pipe 13 is connected and fixed with the main shell 11 through the water outlet end cover 15. The present application sets the second sealing ring 27 and the third sealing ring 28, so that the overall structure of the check valve 100 is more tightly connected, and the sealing performance is better.

[0040] In the embodiment, the valve rod 23 extends in a long strip shape, the valve core 22 extends in a hemispherical shell shape, the whole of the valve rod 23 and the valve core 22 extends in an umbrella shape, the valve core 22 is formed with a connected guide surface 22a and a blocking surface 22b, that is, the guide surface 22a and the blocking surface 22b of the valve core 22 are spliced to form the outer surface of the valve core 22, the guide surface 22a protrudes towards the water inlet 12a side, that is, protrudes towards the water outlet pipe 13 side, and the blocking surface 22b is continuously arranged along the circumference of the guide surface 22a. In the normal state, under the joint action of the first magnetic member 24 and the second magnetic member 25, the valve core 22 blocks the water passage 21a, that is, the blocking surface 22b is attached to the opening of the water passage 21a. By arranging the guide surface 22a, when the water flow enters the water passage 21a from the water inlet 12a, the guide surface 22a can guide the valve rod 23 to move more smoothly towards the water outlet pipe 13 side, and the water flow flows more smoothly into the water passage 11a after impacting the guide surface 22a, and the water outlet of the check valve 100 is more stable.

[0041] Furthermore, in the application, the check mechanism further comprises a first sealing ring 27, which is also made of silica gel or rubber, the first sealing ring 27 is connected to the mounting seat 21 and annularly arranged at the passage opening of the water passage 21a, and is arranged in a trumpet shape towards the valve core 22 side. When the valve core 22 blocks the water passage 21a, the blocking surface 22b is attached to the surface of the first sealing ring 27, at this time, under the action of the valve core 22, the first sealing ring 27 is in an open state, so as to further increase the contact area between the blocking surface 22b and the surface of the first sealing ring 27, and thus improve the water stopping effect of the check valve 100.

[0042] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made according to the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A check valve characterized by, include: The outer shell has an inlet, an outlet, and a water flow channel; and The check valve mechanism includes a mounting base, a valve core, a valve stem, a first magnetic component, and a second magnetic component. The mounting base is disposed within the water flow channel and has a sliding connection hole and a water passage connecting the water flow channel and the water inlet. The valve stem is slidably inserted into the sliding connection hole. The valve core is connected to the end of the valve stem. The first magnetic component is connected to the mounting base and is arranged around the outside of the valve stem. The second magnetic component is connected to the valve stem and is coaxially arranged with the first magnetic component. The first magnetic element and the second magnetic element provide magnetic force to cause the valve core to block the water passage.

2. The check valve of claim 1, wherein The mounting base has an annular mounting groove that communicates with the sliding connection hole, and the first magnetic component is embedded in the annular mounting groove. The valve stem has a slot at the end away from the valve core, and the second magnetic component is embedded in the slot.

3. The check valve of claim 2, wherein The valve core has a connecting guide surface and a sealing surface. The guide surface extends in a hemispherical shape and protrudes towards the water inlet side. The sealing surface is continuously arranged along the circumference of the guide surface and can fit into the opening of the water passage.

4. The check valve of claim 3, wherein The check valve mechanism includes a first sealing ring, which is disposed around the opening of the water passage, and the sealing surface can elastically abut against the first sealing ring.

5. The check valve of claim 4, wherein The first sealing ring is arranged in a flared shape facing the valve core.

6. The check valve of any one of claims 1 to 5, wherein, The outer casing includes a main casing, an inlet pipe, an outlet pipe, an inlet end cap, and an outlet end cap. The main casing forms the water flow channel. The inlet pipe and the outlet pipe are located on opposite sides of the main casing and are respectively provided with an inlet and an outlet. The inlet end cap is detachably connected to the main casing and the inlet pipe. The outlet end cap is detachably connected to the main casing and the outlet pipe. The mounting base is detachably connected to the main casing.

7. The check valve of claim 6 wherein, The water inlet cap is threadedly connected to the main housing, and the water inlet pipe is pressed to the end of the main housing; The water outlet cap is threadedly connected to the main housing, and the water outlet pipe is pressed to the end of the main housing.

8. The check valve of claim 6, wherein The main housing is made of a transparent material.

9. The check valve of claim 6 wherein, The check valve also includes a second sealing ring, which is connected to the water inlet and has a sealing groove. The end of the mounting base is elastically embedded in the sealing groove.

10. The check valve of claim 6, wherein The check valve also includes a third sealing ring. The main housing has a recessed groove on the side facing the outlet. The third sealing ring is embedded in the groove and elastically abuts against the outlet pipe.

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