CN219035666U

CN219035666U - Two-way check valve

Info

Publication number: CN219035666U
Application number: CN202223453397.9U
Authority: CN
Inventors: 王成
Original assignee: Yuyao Sperui Water Purification Equipment Co ltd
Current assignee: Yuyao Sperui Water Purification Equipment Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-16
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a bidirectional check valve, which comprises a valve body unit and a sealing unit. The valve body unit is provided with a first chamber, a second chamber, a flow control channel, a first flow channel and a second flow channel, wherein the first flow channel is communicated with the first chamber, the second flow channel is communicated with the second chamber, and the flow control channel extends up and down and is communicated with the first chamber and the second chamber. The sealing unit comprises a connecting rod, a sealing part and a deformable suspension part, the connecting rod extends from the first chamber towards the second chamber through the flow control channel, the sealing part is arranged at the bottom end of the connecting rod, the suspension inner side and the suspension outer side of the suspension part are respectively connected to the top end of the connecting rod and the valve body unit in a mode that the suspension part seals the upper opening of the first chamber, and the sealing part is suspended by the suspension part through the connecting rod.

Description

Two-way check valve

Technical Field

The present utility model relates to a check valve, and more particularly to a two-way check valve.

Background

The check valve is widely used in drinking water equipment such as a water purifier, a water dispenser, etc., which is provided between a water tank and a water pump, and automatically turns on the water tank and the water pump based on a negative pressure principle when the water pump starts pumping water to allow water stored in the water tank to be pumped out through the check valve into the water pump, and automatically blocks the water tank and the water pump to prevent the water stored in the water tank from entering the check valve when the water pump stops working. For example, chinese patent publication No. CN217030142U discloses a negative pressure valve, in the technical scheme of this patent publication, when the delivery port is acted on by the water pump, go up the air chamber and produce the negative pressure, the lower air chamber is atmospheric pressure, therefore, the flexible portion of atmospheric pressure diaphragm can upwards stretch out and draw back the removal, the flexible portion drives the ejector pin and moves up this moment, the ejector pin contradicts the valve plug and can upwards jack open the valve plug, thereby open the valve port, the intercommunication of water inlet and delivery port can realize out water this moment, stop work when the water pump, the flexible portion of atmospheric pressure diaphragm can downwards stretch out and draw back the reset, the ejector pin moves down this moment along with the flexible portion, the valve plug seals the valve port under the drive of spring. Therefore, the negative pressure valve of the above patent is only used for blocking the valve port by the valve plug by means of the way that the spring is abutted against the valve plug, so that the sealing performance of the negative pressure valve is poor, particularly, when the water pressure of the water outlet is large, the valve plug is driven to move upwards by the water from the water outlet to form a gap between the valve plug and the shell, so that the phenomenon that the water from the water outlet flows back to the water inlet through the gap formed between the valve plug and the shell occurs, and the water in the water tank is polluted.

Disclosure of Invention

It is an object of the present utility model to provide a two-way check valve that is capable of preventing reverse flow of fluid.

It is an object of the present utility model to provide a two-way check valve, wherein the two-way check valve provides a valve body unit and a sealing unit, the greater the pressure of the second chamber of the valve body unit, the better the sealing effect of the sealing portion of the sealing unit can be improved, so that the two-way check valve has the capability of preventing the backflow of fluid from the second chamber to the first chamber of the valve body unit.

An object of the present utility model is to provide a bi-directional check valve, wherein the sealing unit provides a connecting rod, a sealing portion, and a suspending portion, the suspending portion is deformably disposed in the first chamber of the valve body unit, and the suspending portion suspends the sealing portion in the first chamber or the flow control channel of the valve body unit through the connecting rod, when the pressure of the second chamber of the valve body unit is greater than the pressure of the first chamber, the fluid in the second chamber applies pressure to the sealing portion, so that the sealing portion closely fits to the valve body unit to prevent the second chamber and the first chamber from communicating. It is understood that the greater the pressure difference between the second chamber and the first chamber of the valve body unit, the greater the pressure applied to the sealing portion by the fluid in the second chamber, and accordingly, the more closely the sealing portion can be fitted to the valve body unit, so that the bidirectional check valve can have an effect of preventing backflow of the fluid.

According to one aspect of the present utility model, there is provided a bi-directional check valve comprising:

the valve body unit is provided with a first chamber, a second chamber, a flow control channel, a first flow channel and a second flow channel, wherein the first chamber and the second chamber are arranged up and down and are communicated through the flow control channel, the first flow channel is communicated with the first chamber, and the second flow channel is communicated with the second chamber; and

the sealing unit comprises a connecting rod, a sealing part and a deformable suspension part, wherein the connecting rod extends from the first chamber of the valve body unit to the second chamber through the flow control channel, the sealing part is arranged at the bottom end of the connecting rod, the suspension inner side and the suspension outer side of the suspension part are respectively connected to the top end of the connecting rod and the valve body unit in a mode that the suspension part seals an upper opening of the first chamber of the valve body unit, so that the suspension part can suspend the sealing part through the connecting rod, and when the pressure of the first chamber of the valve body unit is smaller than or equal to the pressure of the second chamber and the first chamber is positive pressure, the suspension part suspends the sealing part at a position for sealing the flow control channel of the valve body unit through the connecting rod, and when the pressure of the first chamber of the valve body unit is larger than the pressure of the second chamber and the second chamber is negative pressure, the suspension part can open the flow control channel at the position of the valve body unit through the suspension part.

According to an embodiment of the present utility model, the top surface of the sealing portion is provided to be able to fit or move away from the bottom surface of the valve body unit for forming the flow control passage to allow the sealing portion to close or open the flow control passage of the valve body unit.

According to an embodiment of the utility model, the outer wall of the sealing part is arranged to be able to fit or move away from the inner wall of the valve body unit for forming the flow control channel, so as to allow the sealing part to close or open the flow control channel of the valve body unit.

According to one embodiment of the utility model, the connecting rod extends from the first chamber of the valve body unit to the second chamber via the flow control channel.

According to one embodiment of the utility model, the sealing part is mounted at the bottom end of the connecting rod; or the sealing part is integrally formed at the bottom end of the connecting rod; alternatively, the sealing portion and the connecting rod are of unitary construction.

According to one embodiment of the utility model, the suspension is mounted to the top end of the connecting rod; or, the suspension part is integrally formed at the top end of the connecting rod; alternatively, the suspension and the connecting rod are of unitary construction.

According to one embodiment of the utility model, the suspension further comprises an annular suspension element and an annular suspension edge element extending integrally outwards from the suspension element, the inner side of the suspension element forming the suspension inner side of the suspension and the outer side of the suspension element forming the suspension outer side of the suspension, wherein the longitudinal section of the suspension edge element forms an arch.

According to an embodiment of the present utility model, the valve body unit further includes a valve seat and a bottom cover, wherein the first chamber, the flow control passage, the first flow passage, and the second flow passage are formed at the valve seat, the bottom cover is mounted at a bottom of the valve seat to form the second flow passage between the bottom cover and the valve seat, and wherein a suspension outer side of the suspension portion is connected to a top of the valve seat to close an upper opening of the first chamber of the valve body unit by the suspension portion.

According to an embodiment of the present utility model, the valve body unit further includes a top cover mounted on top of the valve seat in such a manner that the top cover and the valve seat sandwich a hanging outer side of the hanging portion.

According to one embodiment of the utility model, the two-way check valve has an escape space formed between the top cover and the suspension part, wherein the top cover has at least one gas passage communicating with the escape space.

According to one embodiment of the utility model, the two-way check valve further comprises a reset element, the reset element is located in the first chamber of the valve body unit, the top end of the reset element abuts against the suspension, and the bottom end of the reset element abuts against the valve body unit.

According to another aspect of the present utility model, the present utility model further provides a flow control method of a bidirectional check valve, wherein the flow control method includes the following steps:

(a) When the pressure of a second chamber of a valve body unit is reduced and the second chamber is negative pressure, a sealing part of a sealing unit drives a suspension part to deform downwards through a connecting rod to accumulate elastic potential energy in the process of moving towards the second chamber of the valve body unit, so that a flow control channel of the valve body unit for communicating a first chamber and the second chamber is allowed to be opened by the sealing part, and fluid is allowed to flow from the first chamber of the valve body unit to the second chamber through the flow control channel; and

(b) When the pressure of the second chamber of the valve body unit is increased and the first chamber is positive pressure, the suspension part drives the sealing part to move towards the first chamber through the connecting rod in the process of restoring the initial state, so that the sealing part is allowed to close the flow control channel of the valve body unit, thereby preventing fluid from flowing from the first chamber of the valve body unit to the second chamber through the flow control channel and preventing fluid from flowing from the second chamber of the valve body unit to the first chamber through the flow control channel.

According to one embodiment of the present utility model, in the step (a), the suspension is allowed to press a reset element toward the direction approaching the second chamber of the valve body unit to deform the reset element to accumulate elastic potential energy, and in the step (b), the suspension is allowed to be pushed toward the direction away from the second chamber of the valve body unit during the restoration of the initial state.

According to another aspect of the present utility model, there is further provided a method for manufacturing a bi-directional check valve, wherein the method comprises the steps of:

(A) Connecting a suspension outer side of a suspension portion to a top of a valve seat to allow the suspension portion to suspend a sealing portion to a bottom of the valve seat by a connection rod movably held in a flow control passage of the valve seat, wherein a first chamber is formed between the valve seat and the suspension portion, the first chamber being in communication with the first flow passage of the valve seat; and

(B) And installing a bottom cover on the bottom of the valve seat, wherein a second chamber is formed between the bottom cover and the valve seat, and the second chamber is communicated with a second flow passage of the valve seat.

According to one embodiment of the utility model, the step (a) further comprises:

(a.1) allowing a bottom end of the connecting rod to extend from a top to a bottom of the valve seat via the flow control passage of the valve seat;

(a.2) connecting a suspension outer side of the suspension portion to a top of the valve seat; and

(a.3) mounting the sealing portion at the bottom end of the connecting rod.

(a.1') allowing a top end of the connecting rod to extend from a bottom to a top of the valve seat through the flow control passage of the valve seat;

(a.2') installing a suspension inner side of the suspension part at a tip end of the connection rod; and

(a.3') connecting the suspension outer side of the suspension portion to the top of the valve seat.

According to one embodiment of the utility model, in the step (a.2), wherein the suspension is mounted to the top end of the connecting rod; or, the suspension part is integrally formed at the top end of the connecting rod; alternatively, the suspension and the connecting rod are of unitary construction.

According to an embodiment of the present utility model, in the above method, the sealing portion is mounted to a bottom end of the connecting rod; or the sealing part is integrally formed at the bottom end of the connecting rod; alternatively, the sealing portion and the connecting rod are of unitary construction.

According to one embodiment of the utility model, before the step (a.1), the step (a) further comprises the steps of: and (2) sleeving a reset element on the connecting rod so as to allow the top end and the bottom end of the reset element to respectively abut against the suspension part and the valve seat after the step (A.2).

According to one embodiment of the utility model, before said step (a.2'), said step (a) further comprises the step of: and (2) sleeving a reset element on the connecting rod so as to allow the top end and the bottom end of the reset element to respectively abut against the suspension part and the valve seat after the step (A.2').

According to an embodiment of the present utility model, after the step (a), the manufacturing method further includes the steps of: a top cover is mounted on the top of the valve seat so as to clamp the suspension outer side of the suspension part by the top cover and the valve seat.

Drawings

FIG. 1 is a schematic perspective view of a bi-directional check valve according to a preferred embodiment of the present utility model.

FIG. 2A is an exploded view of the two-way check valve according to the preferred embodiment of the present utility model.

FIG. 2B is an exploded view of the two-way check valve according to another aspect of the present utility model.

FIG. 3 is a schematic cross-sectional view of the two-way check valve according to the above preferred embodiment of the present utility model.

Fig. 4A is a schematic cross-sectional view illustrating a first use state of the bi-directional check valve according to the above preferred embodiment of the present utility model.

FIG. 4B is a schematic cross-sectional view of the second use state of the bi-directional check valve according to the above preferred embodiment of the present utility model.

Fig. 4C is a schematic cross-sectional view illustrating a third use state of the bi-directional check valve according to the above preferred embodiment of the present utility model.

FIG. 5A is a schematic cross-sectional view of a first state of a bi-directional check valve according to yet another preferred embodiment of the present utility model.

Fig. 5B is a schematic cross-sectional view of the second state of the bi-directional check valve according to the above preferred embodiment of the present utility model.

FIG. 6A is a schematic cross-sectional view of a first state of a bi-directional check valve according to yet another preferred embodiment of the present utility model.

Fig. 6B is a schematic sectional view of the second state of the bi-directional check valve according to the above preferred embodiment of the present utility model.

Detailed Description

Before any embodiments of the utility model are explained in detail, it is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The utility model is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Furthermore, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

Also, in the present disclosure, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus the above terms should not be construed as limiting the present disclosure; in a second aspect, the terms "a" and "an" should be understood as "at least one" or "one or more", i.e. in one embodiment the number of one element may be one, while in another embodiment the number of the element may be plural, the term "a" should not be construed as limiting the number.

A bi-directional check valve according to a preferred embodiment of the present utility model, which includes a valve body unit 10 and a sealing unit 20, will be disclosed and described in the following description with reference to fig. 1 to 4C of the drawings accompanying the description of the present utility model.

Specifically, the valve body unit 10 has a first chamber 101, a second chamber 102, a flow control channel 103, a first flow channel 104, and a second flow channel 105, and the first chamber 101 and the second chamber 102 are disposed up and down and are communicated with each other through the flow control channel 103, the first flow channel 104 is communicated with the first chamber 101, and the second flow channel 105 is communicated with the second chamber 102, taking the view angle shown in fig. 3 as a reference view angle.

The sealing unit 20 comprises a connecting rod 21, a sealing portion 22 and a deformable suspension portion 23. The connecting rod 21 has a rod top 211 and a rod bottom 212 corresponding to the rod top 211, wherein the rod top 211 of the connecting rod 21 is located in the first chamber 101 of the valve body unit 10, and the rod bottom 212 of the connecting rod 21 extends toward the second chamber 102 through the flow control channel 103 of the valve body unit 10. The sealing portion 22 is disposed at the rod bottom end 212 of the connecting rod 21. The suspension portion 23 has a suspension inner side 231 and a suspension outer side 232 corresponding to the suspension inner side 231, and the suspension inner side 231 and the suspension outer side 232 of the suspension portion 23 are respectively connected to the rod body tip 211 of the connecting rod 21 and the valve body unit 10 in such a manner that the suspension portion 23 closes the upper opening of the first chamber 101 of the valve body unit 10 to suspend the sealing portion 22 by the suspension portion 23 through the connecting rod 21.

Turning now to fig. 3, in this particular example of the two-way check valve of the present utility model, the rod bottom end 212 of the connecting rod 21 extends to the second chamber 102 through the flow control passage 103 of the valve body unit 10, so that the rod top end 211 of the connecting rod 21 is located in the first chamber 101 of the valve body unit 10, and the rod bottom end 212 of the connecting rod 21 is located in the second chamber 102 of the valve body unit 10, so that the hanging portion 23 hangs the sealing portion 22 from the second chamber 102 of the valve body unit 10 through the connecting rod 21.

Referring to fig. 4A to 4C, when the pressure of the first chamber 101 of the valve body unit 10 is greater than the pressure of the second chamber 102 and the second chamber 102 is negative pressure, the suspending portion 23 suspends the sealing portion 22 at a position of opening the flow control passage 103 of the valve body unit 10 by the connecting rod 21 to allow the first chamber 101 and the second chamber 102 of the valve body unit 10 to communicate with each other, when the fluid of the first chamber 101 of the valve body unit 10 is allowed to flow to the second chamber 102 through the flow control passage 103. When the pressure of the first chamber 101 of the valve body unit 10 is less than or equal to the pressure of the second chamber 102 and the first chamber 101 is positive pressure, the hanging portion 23 hangs the sealing portion 22 at a position closing the flow control passage 103 of the valve body unit 10 through the connecting rod 21 to prevent the first chamber 101 and the second chamber 102 of the valve body unit 10 from communicating, at which time the fluid of the first chamber 101 of the valve body unit 10 is prevented from flowing to the second chamber 102 through the flow control passage 103.

In the bidirectional check valve of the present utility model, when the pressure of the second chamber 102 of the valve body unit 10 is greater than the pressure of the first chamber 101 and the first chamber 101 is positive pressure, the fluid in the second chamber 102 of the valve body unit 10 applies pressure to the sealing portion 22 so that the sealing portion 22 closely fits to the valve body unit 10 to close the flow control passage 103, thereby preventing the second chamber 102 of the valve body unit 10 from communicating with the first chamber 101, when the second chamber 102 of the valve body unit 10 is closed to the flow control passage 103, and when the pressure of the first chamber 101 is positive pressure, the fluid in the second chamber 102 of the valve body unit 10 is tightly fitted to the valve body unit 10 to close the flow control passage 103, thereby preventing the fluid in the first chamber 101 of the valve body unit 10 from flowing to the second chamber 102 via the flow control passage 103. In other words, the two-way check valve can prevent the reverse flow of the fluid when the sealing portion 22 is suspended at a position closing the flow control passage 103 of the valve body unit 10.

It should be emphasized that the bidirectional check valve according to the present utility model is configured such that the greater the pressure difference between the second chamber 102 and the first chamber 101 of the valve body unit 10, the greater the pressure of the fluid in the second chamber 102 of the valve body unit 10 applied to the sealing portion 22, and accordingly the sealing portion 22 can be closely attached to the valve body unit 10 by the hanging portion 23 of the first chamber 101 of the valve body unit 10 through the connecting rod 21 in a position to close the flow control passage 103 of the valve body unit 10, the more the effect of the bidirectional check valve in preventing the backflow of the fluid is more remarkable.

Turning now to fig. 4A to 4C, in a typical application example of the two-way check valve of the present utility model to a drinking water system, the first flow passage 104 of the valve body unit 10 is connected to a water tank 100 such that the first flow passage 104 of the valve body unit 10 forms a water inlet flow passage, and the second flow passage 105 of the valve body unit 10 is connected to a water pump 200 such that the second flow passage 105 of the valve body unit 10 forms a water outlet flow passage.

When the water pump 200 starts to operate, the water pump 200 pumps water in the second flow passage 105 and the second chamber 102 of the valve body unit 10 to form negative pressure in the second flow passage 105 and the second chamber 102, so as to allow the pressure of the first chamber 101 of the valve body unit 10 to be greater than the pressure of the second chamber 102, at this time, the sealing part 22 moves downward to open the flow control passage 103 of the valve body unit 10 to allow the first chamber 101 and the second chamber 102 to communicate, and water stored in the water tank 100 is allowed to sequentially pass through the first flow passage 104, the first flow control passage 103, the second chamber 102 and the second flow passage 105 of the valve body unit 10 and the water pump 200 to be discharged out of the water drinking system, and during the downward movement of the sealing part 22, the sealing part 22 pulls the suspension inner side 231 of the suspension part 23 downward by the connecting rod 21, so that the suspension part 23 is elastically deformed.

When the water pump 200 stops working, the water pumped into the second flow passage 105 and the second chamber 102 of the valve body unit 10 by the water pump 200 makes the pressure of the second chamber 102 be greater than or equal to the pressure of the first chamber 101, at this time, the hanging part 23 pulls the sealing part 22 upwards through the connecting rod 21 in the process of restoring the initial state, so that the sealing part 22 is hung by the hanging part 23 at the position of closing the flow control passage 103 of the valve body unit 10, and at the same time, the water in the second chamber 102 of the valve body unit 10 applies pressure to the sealing part 22, so that the sealing part 22 is tightly attached to the valve body unit 10 to close the flow control passage 103, thereby preventing the second chamber 102 and the first chamber 101 of the valve body unit 10 from being communicated, so as to achieve the purpose of preventing the backflow of water from the second chamber 102 of the valve body unit 10 to the first chamber 101

In this specific example of the bidirectional check valve of the present utility model, referring to fig. 3, when the hanging portion 23 is hung at a position closing the flow control passage 103 of the valve body unit 10 by the connecting rod 21, the top surface 221 of the sealing portion 22 is adhered to the bottom surface 106 of the valve body unit 10 for forming the flow control passage 103 to allow the sealing portion 22 to close the flow control passage 103 of the valve body unit 10.

In other words, the top surface 221 of the sealing portion 22 is configured to be able to abut against or move away from the bottom surface 106 of the valve body unit 10, wherein when the top surface 221 of the sealing portion 22 is configured to abut against the bottom surface 106 of the valve body unit 10, the sealing portion 22 is suspended in a position closing the flow control passage 103 of the valve body unit 10 to prevent the first chamber 101 and the second chamber 102 of the valve body unit 10 from communicating, and correspondingly, when the top surface 221 of the sealing portion 22 is configured to move away from the bottom surface 106 of the valve body unit 10, the sealing portion 22 is suspended in a position opening the flow control passage 103 of the valve body unit 10 to allow the first chamber 101 and the second chamber 102 of the valve body unit 10 to communicate.

Alternatively, in still another preferred example of the bidirectional check valve of the present utility model shown in fig. 5A and 5B, the hanging portion 23 hangs the sealing portion 22 from the flow control passage 103 of the valve body unit 10 by the connecting rod 21 such that an outer wall 222 of the sealing portion 22 is provided to be able to be fitted to or removed from an inner wall 107 of the valve body unit 10 for forming the flow control passage 103, wherein the sealing portion 22 is hung in a position closing the flow control passage 103 of the valve body unit 10 when the outer wall 222 of the sealing portion 22 is provided to be fitted to the inner wall 107 of the valve body unit 10 to prevent the first chamber 101 and the second chamber 102 of the valve body unit 10 from communicating, and accordingly, the sealing portion 22 is hung in a position opening the flow control passage 103 of the valve body unit 10 when the outer wall 222 of the sealing portion 22 is provided to be moved away from the inner wall 107 of the valve body unit 10 to allow the first chamber 101 and the second chamber 102 of the valve body unit 10 to communicate.

In addition, in this specific example of the two-way check valve shown in fig. 1 to 4C, the sealing portion 22 and the connecting rod 21 may be made of different materials, for example, the sealing portion 22 may be mounted to the rod bottom end 212 of the connecting rod 21 after being manufactured separately, or the sealing portion 22 may be integrally formed at the rod bottom end 212 of the connecting rod 21 by an insert injection process after the connecting rod 21 is manufactured. In another preferred example of the two-way check valve shown in fig. 6A and 6B, the sealing portion 22 and the connecting rod 21 may be integrally formed of the same material.

With continued reference to fig. 2 to 4C, the hanging portion 23 further includes an annular hanging member 233 and an annular hanging edge member 234 integrally extending outward from the hanging member 233, the inside of the hanging member 233 forming the hanging inside 231 of the hanging portion 23 being connected to the rod body top 211 of the connecting rod 21, the outside of the hanging edge member 234 forming the hanging outside 232 of the hanging portion 23 being connected to the valve body unit 10, wherein the longitudinal cross section of the hanging edge member 234 is formed in an arch shape to increase the restoring force of the hanging portion 23 while reducing the height dimension of the hanging portion 23, which is important for ensuring the backflow preventing effect of the bi-directional check valve while reducing the height dimension of the bi-directional check valve.

With continued reference to fig. 1 to 4C, the valve body unit 10 further includes a valve seat 11 and a bottom cover 12, wherein the first chamber 101, the flow control passage 103, the first flow passage 104 and the second flow passage 105 are formed in the valve seat 11, wherein the bottom cover 12 is mounted on a bottom portion of the valve seat 11 to form the second chamber 102 between the valve seat 11 and the bottom cover 12, and the second chamber 102 communicates with the first chamber 101 through the flow control passage 103. The suspension outer side 232 of the suspension 23 is connected to the top of the valve seat 11 to close the upper opening of the first chamber 101 of the valve body unit 10 by the suspension 23.

It should be noted that the manner of connecting the suspension outer side 232 of the suspension portion 23 to the top portion of the valve seat 11 is not limited in the bidirectional check valve of the present utility model, as long as the two can be reliably connected. For example, in this specific example of the two-way check valve of the present utility model shown in fig. 1 to 4C, the valve body unit 10 further includes a top cover 13, and the top cover 13 is mounted on top of the valve seat 11 in such a manner that the top cover 13 and the valve seat 11 sandwich the suspension outer side 232 of the suspension 23.

As a preferred example, the top cover 13, the valve seat 11, and the bottom cover 12 of the valve body unit 10 may be provided with a set of perforations, respectively, in which nuts are installed after one end of a screw passes through the perforations of the top cover 13, the perforations of the valve seat 11, and the perforations of the bottom cover 12 in order to reliably install the top cover 13, the valve seat 11, and the bottom cover 12 from a combination of the screw and the nuts.

To avoid the repeated deformation of the position of the hanging portion 23 relative to the valve body unit 10, the valve body unit 10 forms a locking groove 108 located at the outer side and a locking channel 109 located at the inner side between the valve seat 11 and the bottom cover 12, the locking channel 109 communicates with the locking groove 108, and the height dimension of the locking channel 109 is smaller than the height dimension of the locking groove 108, wherein the edge of the hanging edge member 234 of the hanging portion 23 has a locking arm 2341 and a locking protrusion 2342 connected to the locking arm 2341 at the outer side, and the thickness dimension of the locking protrusion 2342 is larger than the thickness dimension of the locking arm 2341, wherein the locking arm 2341 and the locking protrusion 2342 of the hanging edge member 234 are respectively disposed on the locking channel 109 and the locking groove 108 of the valve body unit 10, so that the hanging outer side 232 of the hanging portion 23 is reliably connected to the valve body unit 10.

Preferably, the bi-directional check valve has at least one escape space 30 formed between the top cover 13 and the hanging part 23 to hide the hanging part 23 from view, wherein the top cover 13 has at least one gas passage 131, the gas passage 131 is communicated with the escape space 30, so that when the sealing part 22 moves downward to open the flow control passage 103 of the valve body unit 10, external gas is allowed to enter the escape space 30 of the bi-directional check valve through the gas passage 131 of the top cover 13, so that the sealing part 22 can deform the hanging part 23 by pulling down the hanging inner side 231 of the hanging part 23 through the connecting rod 21, and accordingly, when the sealing part 22 is pulled up through the connecting rod 21 during the restoration of the hanging part 23 to an initial state, the gas of the escape space 30 of the bi-directional check valve can be discharged to the outside through the gas passage 131 of the top cover 13.

With continued reference to fig. 2A to 4C, the bidirectional check valve further includes a reset element 40, where the reset element 40 is located in the first chamber 101 of the valve body unit 10, and a top end of the reset element 40 abuts against the suspension portion 23, and a bottom end of the reset element 40 abuts against the valve seat 11, so that the reset element 40 can assist the suspension portion 23 to suspend the sealing portion 22 at a position closing the flow control channel 103 of the valve body unit 10 through the connecting rod 21. When the water pump 200 starts to operate, the water pump 200 pumps the water in the second flow passage 105 and the second chamber 102 of the valve body unit 10 to form a negative pressure to the second flow passage 105 and the second chamber 102, so as to allow the pressure of the first chamber 101 of the valve body unit 10 to be greater than the pressure of the second chamber 102, at this time, the sealing part 22 moves downward to open the flow control passage 103 of the valve body unit 10 to allow the first chamber 101 and the second chamber 102 to communicate, the water stored in the water tank 100 is allowed to sequentially pass through the first flow passage 104, the first chamber 101, the flow control passage 103, the second chamber 102 and the second flow passage 105 of the valve body unit 10, and the water pump 200 to be discharged out of the water drinking system, and during the downward movement of the sealing part 22, the sealing part 22 pulls the suspension inner side 231 of the suspension part 23 downward by the connecting rod 21 to cause the suspension part 23 to generate a return potential energy to the elastic deformation in the direction of the suspension part 23, and at the same time the elastic deformation accumulation member 40 is pressed toward the reset potential energy accumulation member 40.

When the water pump 200 stops working, the water pumped into the second flow passage 105 and the second chamber 102 of the valve body unit 10 by the water pump 200 makes the pressure of the second chamber 102 be greater than or equal to the pressure of the first chamber 101, at this time, the hanging part 23 and the resetting element 40 respectively pull the sealing part 22 upwards through the connecting rod 21 in the process of restoring the initial state, so that the sealing part 22 is hung by the hanging part 23 at the position of closing the flow control passage 103 of the valve body unit 10, and meanwhile, the water in the second chamber 102 of the valve body unit 10 applies pressure to the sealing part 22, so that the sealing part 22 is tightly attached to the valve body unit 10 to close the flow control passage 103, thereby preventing the second chamber 102 and the first chamber 101 of the valve body unit 10 from being communicated, and achieving the purpose of preventing the backflow of the water from the second chamber 102 to the first chamber 101 of the valve body unit 10.

Preferably, the return element 40 is a compression spring, which is fitted around the connecting rod 21 to prevent the return element 40 from being inclined or dislocated with the first chamber 101 of the valve body unit 10 when the bi-directional check valve is used for a long period of time.

According to another aspect of the present utility model, the present utility model further provides a flow control method of the bidirectional check valve, wherein the flow control method includes the following steps:

(a) When the pressure of the second chamber 102 of the valve body unit 10 is reduced, the sealing portion 22 of the sealing unit 10 drives the hanging portion 23 to deform downward by the connecting rod 21 to accumulate elastic potential energy in the process of moving toward the second chamber 102 of the valve body unit 10, so as to allow the sealing portion 22 to open the flow control passage 103 of the valve body unit 10 for communicating the first chamber 101 and the second chamber 102, thereby allowing fluid to flow from the first chamber 101 of the valve body unit 10 to the second chamber 102 through the flow control passage 103; and

(b) When the pressure of the second chamber 102 of the valve body unit 10 increases, the suspension portion 23 drives the sealing portion 22 to move toward the first chamber 101 through the connecting rod 21 in the process of restoring the initial state, so as to allow the sealing portion 22 to close the flow control passage 103 of the valve body unit 10, thereby preventing fluid from flowing from the first chamber 101 of the valve body unit 10 to the second chamber 102 through the flow control passage 103, and preventing fluid from flowing from the second chamber 102 of the valve body unit 10 to the first chamber 101 through the flow control passage 103.

Preferably, in the step (a), the suspension 23 is allowed to press the reset element 40 toward the direction approaching the second chamber 102 of the valve body unit 10 to deform the reset element 40 to accumulate elastic potential energy, and in the step (b), the reset element 40 is allowed to push the suspension 23 toward the direction away from the second chamber 102 of the valve body unit 10 during the restoration of the initial state.

According to another aspect of the present utility model, the present utility model further provides a method of manufacturing the bidirectional check valve, wherein the method of manufacturing comprises the steps of:

(A) Connecting the suspension outer side 232 of the suspension portion 23 to the top of the valve seat 11 to allow the suspension portion 23 to suspend the sealing portion 22 to the bottom of the valve seat 11 by the connecting rod 21 movably held at the flow control passage 103 of the valve seat 11, wherein the first chamber 101 is formed between the valve seat 11 and the suspension portion 23, the first chamber 101 being in communication with the first flow passage 104 of the valve seat 11; and

(B) The bottom cover 12 is installed at the bottom of the valve seat 11, wherein the second chamber 102 is formed between the bottom cover 12 and the valve seat 11, and the second chamber 102 communicates with the second flow passage 105 of the valve seat 11.

In some embodiments of the manufacturing method of the present utility model, the step (a) further includes the steps of: firstly, the suspension inner side 231 of the suspension 23 is connected to the rod top end 211 of the connecting rod 21, secondly, the rod lower end 212 of the connecting rod 21 is allowed to extend from the top to the bottom of the valve seat 11 through the flow control passage 103 of the valve seat 11, thirdly, the suspension outer side 232 of the suspension 23 is connected to the top of the valve seat 11, and finally, the sealing portion 22 is mounted to the rod bottom end 212 of the connecting rod 21.

It should be noted that, in the above method, the manner of connecting the suspending inner side 231 of the suspending portion 23 to the rod body top 211 of the connecting rod 21 is not limited in the manufacturing method of the present utility model. For example, in this specific example shown in fig. 1 to 4C, the suspension 23 and the connection rod 21 may be mounted to the rod body top 211 of the connection rod 21 after being manufactured separately, and specifically, the suspension 23 may have a suspension mounting cavity 235 to which the rod body top 211 of the connection rod 21 extends and is fixed to the suspension mounting cavity 235 of the suspension 23 to mount the suspension 23 to the rod body top 211 of the connection rod 21. In some alternative examples, it is also possible to integrally form the suspension 23 at the rod body top end 211 of the connecting rod 21 by an insert injection process after the connecting rod 21 is manufactured. In other alternative examples, the suspension 23 and the connecting rod 21 may be integrally formed of the same material.

It should be further noted that, in the above method, the manner of mounting the sealing portion 22 on the rod bottom end 212 of the connecting rod 21 is not limited in the manufacturing method of the present utility model. For example, in the specific example shown in fig. 1 to 4C, the sealing portion 22 has a sealing portion mounting cavity 223, and the rod bottom end 212 of the connecting rod 21 extends to and is fixed to the sealing portion mounting cavity 223 of the sealing portion 22 to mount the sealing portion 22 to the rod bottom end 212 of the connecting rod 21.

Further, before allowing the rod body low end 212 of the connecting rod 21 to extend from the top to the bottom of the valve seat 11 via the flow control passage 103 of the valve seat 11, the step (a) further includes the steps of: the reset element 40 is sleeved on the connecting rod 21, so that after allowing the rod body low end 212 of the connecting rod 21 to extend from the top to the bottom of the valve seat 11 through the flow control passage 103 of the valve seat 11, the top and bottom ends of the reset element 40 are allowed to abut against the suspension 23 and the valve seat 11, respectively.

In other embodiments of the manufacturing method of the present utility model, the step (a) further includes the steps of: firstly, the rod body top 211 of the connecting rod 21 is allowed to extend from the bottom to the top of the valve seat 11 through the flow control passage 103 of the valve seat 11, secondly, the suspension inner side 231 of the suspension 23 is mounted on the rod body top 211 of the connecting rod 211, and thirdly, the suspension outer side 232 of the suspension 23 is connected on the top of the valve seat 11.

Further, the step (a) further includes the steps of, before the suspending inner side 231 of the suspending portion 23 is mounted on the rod body tip 211 of the connecting rod 211: the restoring member 40 is fitted to the connecting rod 21 so as to allow the top and bottom ends of the restoring member 40 to abut against the suspending portion 23 and the valve seat 11, respectively, after the suspending inner side 231 of the suspending portion 23 is mounted to the rod top end 211 of the connecting rod 211.

Further, after the step (a), the manufacturing method further includes the steps of: the top cover 13 is mounted on top of the valve seat 11 to sandwich the suspension outer side 232 of the suspension 23 by the top cover 13 and the valve seat 11.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.

Claims

1. The bidirectional check valve is characterized by comprising:

2. The bi-directional check valve of claim 1 wherein a top surface of said sealing portion is configured to engage or disengage a bottom surface of said valve body unit for forming said flow control passage to allow said sealing portion to close or open said flow control passage of said valve body unit.

3. The bi-directional check valve of claim 1 wherein an outer wall of said seal is configured to engage or move away from an inner wall of said valve body unit for forming said flow control passage to allow said seal to close or open said flow control passage of said valve body unit.

4. The bi-directional check valve of claim 1 wherein said connecting rod extends from said first chamber to said second chamber of said valve body unit via said flow control passage.

5. The bi-directional check valve of claim 1 wherein said seal is mounted to a bottom end of said connecting rod; or the sealing part is integrally formed at the bottom end of the connecting rod; alternatively, the sealing portion and the connecting rod are of unitary construction.

6. The bi-directional check valve of claim 1 wherein said suspension is mounted to a top end of said connecting rod; or, the suspension part is integrally formed at the top end of the connecting rod; alternatively, the suspension and the connecting rod are of unitary construction.

7. The bi-directional check valve of claim 1 wherein said hanging portion further comprises an annular hanging member and an annular hanging edge member extending integrally outwardly from said hanging member, an inner side of said hanging member forming an inner side of said hanging portion and an outer side of said hanging edge member forming an outer side of said hanging portion, wherein a longitudinal cross-section of said hanging edge member forms an arch.

8. The bi-directional check valve according to claim 1, wherein the valve body unit further comprises a valve seat and a bottom cover, wherein the first chamber, the flow control passage, the first flow passage, and the second flow passage are formed at the valve seat, the bottom cover is mounted at a bottom of the valve seat to form the second flow passage between the bottom cover and the valve seat, wherein a suspension outer side of the suspension portion is connected to a top of the valve seat to close an upper opening of the first chamber of the valve body unit by the suspension portion.

9. The bi-directional check valve of claim 8 wherein said valve body unit further comprises a top cap mounted on top of said valve seat in a manner that said top cap and said valve seat sandwich a overhanging outer side of said overhanging portion.

10. The bi-directional check valve of claim 9 wherein said bi-directional check valve has a relief space formed between said cap and said suspension, wherein said cap has at least one gas passage communicating with said relief space.

11. The bi-directional check valve according to any one of claims 1 to 10, wherein the bi-directional check valve further comprises a reset element located in the first chamber of the valve body unit with a top end of the reset element abutting the suspension and a bottom end of the reset element abutting the valve body unit.