Check valve and water purifier

Abstract

The check valve comprises a shell and a check assembly, the shell is provided with an inlet, an outlet and a flow channel communicated with the inlet and the outlet, an exhaust hole is formed in the wall face of the shell, the exhaust hole is located on the upstream of the check assembly and used for communicating the flow channel with the outside, and the check valve further comprises a valve plate and a sliding guide mechanism. The valve plate is arranged on the shell in a sliding mode in the axial direction of the shell through a sliding guide mechanism. When the valve plate slides to the first position, the exhaust hole is opened, and the flow channel communicates with the outside through the exhaust hole. And when the valve plate slides to the second position, the valve plate covers and seals the exhaust hole, and the exhaust hole is closed. According to the check valve, the exhaust hole is formed in the upstream portion of the check structure, the valve plate is operated to slide to the first position or the second position, opening or closing of the exhaust hole is achieved, gas in an upstream flow channel of the check valve is exhausted, remaining liquid pulled by the check structure is exhausted, a pump body installed on the upstream portion of the check valve is convenient to exhaust, and the check valve is convenient to use. The efficiency of the pump body is improved.

Description

Technical Field

[0001] The utility model relates to a check valve and a water purifier. Background Art

[0002] The check valve often works automatically. When the fluid flows in the normal direction, the valve disc or piston is opened by the kinetic energy of the fluid, and when the fluid flows in reverse, these components automatically close and cut off the fluid channel. Due to the above advantages of the check valve, the check valve has been widely used in aquatic products, such as water purifiers, water heaters, etc. Especially for some products with complex waterways and many branches, when it is necessary to prevent the reverse flow of water, it is achieved through a check valve. However, in some cases, when the check valve prevents the reverse flow of water, it also brings about the problem of air entrapment upstream of the check structure of the check valve. For example, when using a centrifugal pump to pump water from a water tank, if a check valve is needed after the centrifugal pump, when the centrifugal pump empties the water in the water tank, air enters the centrifugal pump, which will cause water entrapment and air problem. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect of the check valve in the prior art that air is easily trapped, and to provide a check valve and a water purifier.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A check valve, comprising a housing and a check assembly, wherein the housing has an inlet, an outlet and a flow channel connecting the inlet and the outlet, an exhaust hole is arranged on the wall surface of the housing, the exhaust hole is located upstream of the check assembly, and the exhaust hole is used to connect the flow channel with the outside, the check valve further comprises a valve plate and a guide slide mechanism, and the valve plate is slidably arranged on the housing along the axial direction of the housing through the guide slide mechanism;

[0006] When the valve plate slides to the first position, the exhaust hole is opened, and the flow channel is connected to the outside through the exhaust hole;

[0007] When the valve plate slides to the second position, the valve plate covers and blocks the exhaust hole, and the exhaust hole is closed.

[0008] In this solution, the check valve is provided with an exhaust hole upstream of the check structure, and the exhaust hole is opened or closed by operating the valve plate to slide to the first position or the second position, which is used to discharge the gas in the flow channel upstream of the check valve, so that the retained liquid pulled by the check structure is discharged, and it is also convenient to exhaust the pump body installed upstream of the check valve, thereby improving the efficiency of the pump body. At the same time, the valve plate is installed on the shell through a guide sliding mechanism, and the valve plate slides along the axial direction of the shell. Compared with the radial sliding exhaust structure, the exhaust sliding of the utility model is smooth, and the structure is simple and compact. At the same time, by pushing the valve plate to slide to different positions, the exhaust hole can be opened or closed, and the operation is simple and convenient.

[0009] Preferably, the guide mechanism comprises a guide groove and a sliding part, the guide groove is arranged on the housing, the sliding part is arranged on the valve plate, and the sliding part is embedded in the guide groove;

[0010] Alternatively, the guide groove is arranged on the valve plate, the sliding part is arranged on the shell, and the sliding part is embedded in the guide groove.

[0011] In this solution, the guide mechanism composed of the guide groove and the sliding part has a simple structure and is easy to be arranged on the housing and the valve plate without significantly increasing the volume of the housing and the valve plate, and has a compact structure.

[0012] Of course, in other alternative solutions, a slide guide mechanism of a slide rail and a slide groove or other slide guide mechanisms with a slide guide function may also be used.

[0013] Preferably, sliding guide mechanisms are provided on both sides of the valve plate to facilitate smooth sliding of the valve plate and improve the accuracy of the sliding direction and the smoothness of the sliding.

[0014] Preferably, the check valve further comprises a positioning mechanism, wherein the positioning mechanism is disposed between the housing and the valve plate, and the positioning mechanism can fix the valve plate at the first position or the second position.

[0015] In this solution, the positioning mechanism is used to fix the valve plate and keep the valve plate in the first position or the second position to prevent the valve plate from sliding randomly, thereby changing the opening and closing state of the exhaust hole and improving the reliability of the exhaust structure.

[0016] Preferably, the positioning mechanism comprises a clamping head and a clamping slot, the number of the clamping slots is two, one of the clamping slots corresponds to the first position, the other of the clamping slots corresponds to the second position, the clamping head is clamped in the clamping slots and can switch between the two clamping slots;

[0017] The clamping head is arranged on the valve plate, and the clamping groove is arranged on the shell, or the clamping head is arranged on the shell, and the clamping groove is arranged on the valve plate.

[0018] In this solution, the positioning mechanism of the matching clamp head and the clamping groove has a simple structure and is easy to be arranged on the housing and the valve plate without causing a significant increase in the volume of the housing and the valve plate, and has a compact structure.

[0019] Of course, in other alternative solutions, the positioning mechanism may also be replaced by other positioning or locking mechanisms.

[0020] Preferably, the clamping head is arranged on the valve plate, the clamping head protrudes from the edge of the valve plate, the valve plate has a through hole, and the through hole is arranged close to the clamping head so that the clamping head has elasticity.

[0021] In this solution, a hole is opened on the valve plate to make the clamp head elastic, so that the clamp head can be easily extended and retracted. When the valve plate slides from the first position to the second position, the elastic clamp head can slide from one slot to another, and the state switching is smooth without stagnation.

[0022] Of course, in other alternative solutions, the clamping head may also have a telescopic function by providing an elastic component.

[0023] Preferably, there are multiple positioning mechanisms, and the multiple positioning mechanisms are symmetrically arranged on both sides of the valve plate.

[0024] In this solution, by symmetrically arranging the positioning mechanisms on both sides of the valve plate, the valve plate is subjected to uniform force and accurately positioned.

[0025] Preferably, a recessed portion is provided on the outer peripheral surface of the shell, the exhaust hole is located inside the recessed portion, and the valve plate is installed and slidably disposed on the recessed portion through the guide sliding mechanism.

[0026] In this solution, the valve plate is embedded in the recessed portion and slides in the recessed portion, and the structure is compact.

[0027] Preferably, the check valve further comprises a sealing ring, the bottom of the recessed portion has a groove, the groove is arranged around the circumference of the exhaust hole, and the sealing ring is embedded in the groove.

[0028] In this solution, when the valve plate is in the second position, the sealing ring is used to seal the gap between the valve plate and the housing to prevent the check valve from leaking air or liquid through the exhaust hole, thereby improving air tightness.

[0029] Of course, in other alternative solutions, the sealing ring may also be arranged on the inner side of the valve plate.

[0030] Preferably, the valve plate has a through hole, and when the valve plate slides to the first position, the through hole is aligned with and connected to the exhaust hole;

[0031] And / or, a push-twist device is provided on the outer side of the valve plate.

[0032] In this solution, a through hole is set on the valve plate. When the valve plate slides to a position where the through hole is aligned with the exhaust hole, the exhaust hole can be opened. When the valve plate slides to a position where the through hole is misaligned with the exhaust hole, the exhaust hole can be closed. The sliding stroke of the valve plate is short, the volume of the valve plate is small, and there is no need to slide the valve plate to a position that is completely misaligned with the exhaust hole. The position of the valve plate can be easily switched by manually operating the push and twist.

[0033] A water purifier comprises a centrifugal pump and the check valve as described above, wherein the check valve is installed at the water outlet end of the centrifugal pump.

[0034] In this solution, the check valve prevents water from flowing back to the centrifugal pump, and is used to protect the centrifugal pump. When gas is trapped between the centrifugal pump and the check valve, the gas can be exhausted by opening the exhaust structure on the check valve, so that the inner cavity of the centrifugal pump is filled with water, thereby improving the working efficiency of the centrifugal pump.

[0035] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the utility model.

[0036] The positive and progressive effect of the utility model is that the check valve is provided with an exhaust hole upstream of the check structure, and the exhaust hole is opened or closed by operating the valve plate to slide to the first position or the second position, which is used to discharge the gas in the upstream flow channel of the check valve, so that the retained liquid pulled by the check structure is discharged, and it is also convenient to exhaust the pump body installed upstream of the check valve, thereby improving the efficiency of the pump body. At the same time, the valve plate is installed on the shell through a guide sliding mechanism, and the valve plate slides along the axial direction of the shell. Compared with the radial sliding exhaust structure, the exhaust structure of the utility model slides smoothly, is simple and compact, and at the same time, by pushing the valve plate to slide to different positions, the exhaust hole can be opened or closed, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The structure of the check valve of a preferred embodiment of the utility model is shown in FIG. Figure 1 .

[0038] Figure 2 for Figure 1 Sectional view along line AA.

[0039] Figure 3 A schematic diagram of the structure of a hidden cover plate of a check valve in a preferred embodiment of the utility model Figure 2 .

[0040] Figure 4 This is a schematic structural diagram of a valve plate according to a preferred embodiment of the utility model.

[0041] Figure 5It is a structural schematic diagram of the main body of a preferred embodiment of the utility model.

[0042] Description of reference numerals:

[0043] Shell 1

[0044] Cover 101

[0045] Ontology 102

[0046] Import 11

[0047] Exit 12

[0048] Runner 13

[0049] Exhaust hole 14

[0050] Depression 15

[0051] Groove 151

[0052] Valve seat 16

[0053] Check component 2

[0054] Spool 21

[0055] Elastic member 22

[0056] Valve plate 3

[0057] Via 31

[0058] Through hole 32

[0059] Push and Twist 33

[0060] Guide mechanism 4

[0061] Guide chute 41

[0062] Sliding portion 42

[0063] Positioning mechanism 5

[0064] Card head 51

[0065] Card slot 52

[0066] Sealing ring 6

[0067] Axial direction 100 DETAILED DESCRIPTION

[0068] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0069] like Figure 1-Figure 5As shown, this embodiment discloses a check valve, which includes a housing 1 and a check assembly 2. The housing 1 has an inlet 11, an outlet 12, and a flow channel 13 connecting the inlet 11 and the outlet 12. The check assembly 2 is installed on the flow channel 13, and is used for the check valve to unidirectionally conduct from the inlet 11 to the outlet 12. An exhaust hole 14 is provided on the wall surface of the housing 1, and the exhaust hole 14 is located upstream of the check assembly 2. The exhaust hole 14 is used to connect the flow channel 13 with the outside. The check valve also includes a valve plate 3 and a guide slide mechanism 4. The valve plate 3 is slidably arranged on the housing 1 along the axial direction 100 of the housing 1 through the guide slide mechanism 4. When the valve plate 3 slides to the first position, the exhaust hole 14 is opened, and the flow channel 13 is connected to the outside through the exhaust hole 14; when the valve plate 3 slides to the second position, the valve plate 3 covers and closes the exhaust hole 14, and the exhaust hole 14 is closed.

[0070] In this embodiment, the check valve is provided with an exhaust hole 14 upstream of the check structure, and the exhaust hole 14 is opened or closed by operating the valve plate 3 to slide to the first position or the second position, which is used to discharge the gas in the upstream flow channel 13 of the check valve, so that the retained liquid pulled by the check structure is discharged, and it is also convenient to exhaust the pump body installed upstream of the check valve, thereby improving the efficiency of the pump body. At the same time, the valve plate 3 is installed on the housing 1 through the guide sliding mechanism 4, and the valve plate 3 slides along the axial direction 100 of the housing 1. Compared with the radial sliding exhaust structure, the exhaust structure of the utility model is simple and compact. At the same time, by pushing the valve plate 3 to slide to different positions, the exhaust hole 14 can be opened or closed, and the operation is simple and convenient.

[0071] Of course, in other alternative embodiments, the valve plate may also slide in a direction different from the axial direction.

[0072] like Figure 3 and Figure 5 As shown, the outer peripheral surface of the housing 1 has a recessed portion 15, the exhaust hole 14 is located inside the recessed portion 15, and the valve plate 3 is installed and slidably arranged in the recessed portion 15 through the guide sliding mechanism 4. The valve plate 3 is embedded in the recessed portion 15 and slides in the recessed portion 15, with a simple appearance and a compact structure.

[0073] like Figure 1 and Figure 2 As shown, the shell 1 includes a cover plate 101 and a body 102 . The cover plate 101 covers the recessed portion 15 and is detachably connected to the body 102 . A guide groove 41 is formed between the cover plate 101 and the body 102 . An operation window is provided in the middle of the cover plate 101 .

[0074] like Figure 2 and Figure 5As shown, the check valve further includes a sealing ring 6, the bottom of the recessed portion 15 has a groove 151, the groove 151 is arranged around the circumference of the exhaust hole 14, and the sealing ring 6 is embedded in the groove 151. When the valve plate 3 is in the second position, the sealing ring 6 is used to seal the gap between the valve plate 3 and the housing 1 to prevent the check valve from leaking gas or liquid through the exhaust hole 14, thereby improving air tightness.

[0075] Of course, in other alternative embodiments, the sealing ring may also be arranged on the inner side of the valve plate.

[0076] like Figure 2-Figure 4 As shown, the valve plate 3 has a through hole 31. When the valve plate 3 slides to the first position, the through hole 31 is aligned with and connected to the exhaust hole 14, so that the exhaust hole 14 can be opened. When the valve plate 3 slides to a position where the through hole 31 is misaligned with the exhaust hole 14, the exhaust hole 14 can be closed. By providing the through hole 31 on the valve plate 3, the sliding stroke of the valve plate 3 is short, the volume of the valve plate 3 is small, and the valve plate 3 does not need to be slid to a position completely misaligned with the exhaust hole 14.

[0077] A push knob 33 is provided on the outer side of the valve plate 3 to facilitate manual operation of the push knob 33 to switch the position of the valve plate 3 .

[0078] like Figure 1 and Figure 2 As shown, in this embodiment, the guide mechanism 4 includes a guide groove 41 and a sliding portion 42, the guide groove 41 is arranged on the housing 1, the sliding portion 42 is arranged on the edge of the valve plate 3, and the sliding portion 42 is embedded in the guide groove 41. The guide mechanism 4 in which the guide groove 41 and the sliding portion 42 cooperate is simple in structure, and is convenient to be arranged on the housing 1 and the valve plate 3 without significantly increasing the volume of the housing 1 and the valve plate 3, and has a compact structure.

[0079] Of course, in other alternative embodiments, the guide groove may be arranged on the valve plate, the sliding part may be arranged on the housing, and the sliding part may be embedded in the guide groove.

[0080] In other alternative embodiments, a slide guide mechanism of a slide rail and a slide groove or other slide guide mechanisms with a slide guide function may also be used.

[0081] In this embodiment, sliding guide mechanisms 4 are provided on both sides of the valve plate 3 to facilitate smooth sliding of the valve plate 3 and improve the accuracy of the sliding direction and the smoothness of the sliding.

[0082] like Figure 3 As shown, in this embodiment, the check valve further includes a positioning mechanism 5, which is disposed between the housing 1 and the valve plate 3, and the positioning mechanism 5 can fix the valve plate 3 at the first position or the second position. The positioning mechanism 5 is used to fix the valve plate 3 and keep the valve plate 3 at the first position or the second position, to prevent the valve plate 3 from sliding at will, thereby changing the opening and closing state of the exhaust hole 14, and improving the reliability of the exhaust structure.

[0083] like Figure 3 As shown, in this embodiment, the positioning mechanism 5 includes a clamp head 51 and a clamping slot 52, the clamp head 51 is arranged on the valve plate 3, the clamping slot 52 is arranged on the housing 1, the number of the clamping slots 52 is two, one clamping slot 52 corresponds to the first position, and the other clamping slot 52 corresponds to the second position, the clamp head 51 is clamped in the clamping slot 52 and can switch between the two clamping slots 52. The positioning mechanism 5 in which the clamp head 51 and the clamping slot 52 cooperate is simple in structure, and is convenient to be arranged on the housing 1 and the valve plate 3 without significantly increasing the volume of the housing 1 and the valve plate 3, and has a compact structure.

[0084] Of course, in other alternative embodiments, the clamping head may be arranged on the housing, and the clamping groove may be arranged on the valve plate.

[0085] In other alternative embodiments, the positioning mechanism may also be replaced by other positioning or locking mechanisms.

[0086] like Figure 3-Figure 5 As shown, the clamp head 51 protrudes from the edge of the valve plate 3, and the valve plate 3 has a through hole 32, which is arranged close to the clamp head 51 so that the clamp head 51 has elasticity. By opening a hole in the valve plate 3, the clamp head 51 has elasticity, which facilitates the expansion and contraction of the clamp head 51. When the valve plate 3 slides from the first position to the second position, the elastic clamp head 51 can slide from one slot 52 to another slot 52, and the state switching is smooth without stagnation. When the valve plate 3 switches positions, the valve plate 3 does not need to be removed.

[0087] Of course, in other alternative embodiments, the clamping head may also have a telescopic function by providing an elastic component.

[0088] In this embodiment, there are two positioning mechanisms 5, which are symmetrically arranged on both sides of the valve plate 3. By symmetrically arranging the positioning mechanisms 5 on both sides of the valve plate 3, the valve plate 3 is subjected to uniform force and accurately positioned.

[0089] Of course, in other embodiments, the number of positioning mechanisms can be selected as needed.

[0090] like Figure 2As shown, the check assembly 2 includes a valve core 21 and an elastic component 22, and a valve seat 16 is provided on the inner wall of the valve body. The valve core 21 is arranged in the flow channel 13 so as to be movable along its own axial direction. The elastic component 22 biases the valve core 21 and makes the valve core 21 abut against the valve seat 16 in the direction of the fluid. The valve core 21 abuts against the valve seat 16 in the direction of the fluid by the elastic force of the elastic component 22, so that the flow channel 13 is closed. The fluid flows in from the inlet 11. When the force of the fluid acting on the valve core 21 is greater than the elastic force of the elastic component 22, the valve core 21 moves away from the valve seat 16, the flow channel 13 is opened, and the flow channel 13 is conducted from the inlet 11 to the outlet 12. When the force of the fluid acting on the valve core 21 is less than the elastic force of the elastic component 22 or the fluid flows from the outlet 12 to the inlet 11, the valve core 21 abuts against the valve seat 16, and the flow channel 13 is closed, so that the flow channel 13 is cut off.

[0091] This embodiment also discloses a water purifier, which includes a centrifugal pump and the check valve as described above, wherein the check valve is installed at the water outlet of the centrifugal pump. The check valve prevents water from flowing back to the centrifugal pump, and is used to protect the centrifugal pump. When gas is trapped between the centrifugal pump and the check valve, the gas can be exhausted by opening the exhaust structure on the check valve, so that the inner cavity of the centrifugal pump is filled with water, thereby improving the working efficiency of the centrifugal pump.

[0092] In the description of this article, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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 a limitation on the present invention.

[0093] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A check valve, comprising a housing and a check assembly, wherein the housing has an inlet, an outlet and a flow channel connecting the inlet and the outlet, characterized in that: An exhaust hole is provided on the wall surface of the shell, the exhaust hole is located upstream of the check assembly, and the exhaust hole is used to connect the flow channel with the outside. The check valve also includes a valve plate and a guide sliding mechanism, and the valve plate is slidably arranged on the shell along the axial direction of the shell through the guide sliding mechanism; When the valve plate slides to the first position, the exhaust hole is opened, and the flow channel is connected to the outside through the exhaust hole; When the valve plate slides to the second position, the valve plate covers and blocks the exhaust hole, and the exhaust hole is closed.

2. The check valve according to claim 1, characterized in that: The guide mechanism comprises a guide groove and a sliding part, wherein the guide groove is arranged on the housing, the sliding part is arranged on the valve plate, and the sliding part is embedded in the guide groove; Alternatively, the guide groove is arranged on the valve plate, the sliding part is arranged on the shell, and the sliding part is embedded in the guide groove.

3. The check valve according to claim 1, characterized in that: The check valve further includes a positioning mechanism, which is disposed between the housing and the valve plate, and is capable of fixing the valve plate at the first position or the second position.

4. The check valve according to claim 3, characterized in that: The positioning mechanism comprises a clamping head and a clamping slot, the number of the clamping slots is two, one of the clamping slots corresponds to the first position, the other of the clamping slots corresponds to the second position, the clamping head is clamped in the clamping slots and can switch between the two clamping slots; The clamping head is arranged on the valve plate, and the clamping groove is arranged on the shell, or the clamping head is arranged on the shell, and the clamping groove is arranged on the valve plate.

5. The check valve according to claim 4, characterized in that: The clamping head is arranged on the valve plate, and the clamping head protrudes from the edge of the valve plate. The valve plate has a through hole, and the through hole is arranged close to the clamping head, so that the clamping head has elasticity.

6. The check valve according to claim 3, characterized in that: There are multiple positioning mechanisms, and the multiple positioning mechanisms are symmetrically arranged on both sides of the valve plate.

7. The check valve according to claim 1, characterized in that: The outer peripheral surface of the shell is provided with a recessed portion, the exhaust hole is located inside the recessed portion, and the valve plate is installed and slidably arranged on the recessed portion through the guide sliding mechanism.

8. The check valve according to claim 7, characterized in that: The check valve further comprises a sealing ring, the bottom of the recessed portion comprises a groove, the groove is arranged around the circumference of the exhaust hole, and the sealing ring is embedded in the groove.

9. The check valve according to claim 1, characterized in that: The valve plate is provided with a through hole, and when the valve plate slides to the first position, the through hole is aligned with and connected to the exhaust hole; And / or, a push-twist device is provided on the outer side of the valve plate.

10. A water purifier, characterized in that: The water purifier comprises a centrifugal pump and a check valve as described in any one of claims 1 to 9, wherein the check valve is installed at the water outlet end of the centrifugal pump.

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