WO2018166041A1

WO2018166041A1 - Pressure relief type one-way valve device

Info

Publication number: WO2018166041A1
Application number: PCT/CN2017/081698
Authority: WO
Inventors: 焦智
Original assignee: 广州旭特铝业科技有限公司
Priority date: 2017-03-13
Filing date: 2017-04-24
Publication date: 2018-09-20
Also published as: CN106996469B; CN106641347A; WO2018165993A1; CN106996469A; CN206708470U

Abstract

Disclosed is a pressure relief type one-way valve device, inside a valve body (10) thereof being a first port (11) and a second port (12) connected to each other, and a channel between the two ports being a pressurized channel (13). A pressurization control device is mounted at the first port (11). There is a pressure relief opening (14) connected to the pressurized channel (13) on a side of the valve body (10), and a pressure relief control device is mounted at the pressure relief opening (14). The pressurized control device comprises a closing element (22) and a sealing element (23). The sealing element (23) having a pressurized via hole (24) connectable to the pressurized channel (13) is fixed at the end face of the first port (11). The closing element (22) is movably mounted inside the pressurized channel (13), and the diameter of the closing element (22) is greater than the aperture of the pressurized via hole (24) and less than the diameter of the pressurized channel (13) at the position thereof. The one-way valve device has a higher reliability, can increase the maximum of the air pressure in a container and helps to save on costs.

Description

Pressure relief type check valve device

Technical field

The invention belongs to the technical field of check valves, and particularly relates to a pressure relief type check valve device suitable for use in a small pressurized device.

Background technique

As a mechanical component that prevents reverse movement of fluids, check valves are widely used in machinery that requires control of fluid flow. For example, mercury sphygmomanometers and other inflatable devices with airbags use check valves.

The structure of a general one-way valve includes a valve body and a valve core mounted on a main passage (pressurizing passage) inside the valve body. The valve core is in the form of a pipe body, and the material is usually synthetic rubber. The pipe body has an opening at one end and a blind end at the other end, and the side of the pipe body has a linear cutting opening penetrating through the pipe, and the cutting port is normally closed.

The working principle of this one-way valve (for example, the one-way valve used for refueling) is: when pressurized, the airflow enters the first half of the main passage inside the valve body, and the airflow will be blocked by the valve body. Will enter the inside of the pipe through the open end of the pipe body, and be blocked by the blind end of the pipe body. As the air pressure inside the pipe body increases, the airflow will open the cutting port on the side of the pipe body and enter the second half of the main channel. A container such as an air bag that communicates with the second half of the passage is inflated; when the air flow continues to enter the container to increase the air pressure in the container, the air pressure seals the cutting opening on the side of the pipe body, thereby preventing gas from flowing out of the main passage of the valve body. It achieves the function of one-way gas entering and maintaining pressure.

A disadvantage of the existing one-way valve is that when the air pressure in the container is increased to a certain extent, the gas will flush the cutting port on the side of the pipe body to cause abnormal pressure relief or gas backflow. The pressure bearing capacity of the pipe body is mainly related to its material and wall thickness. The material is relatively hard and the wall thickness is thicker, the pressure bearing capacity is relatively high. However, if the hardness or wall thickness of the pipe body is increased, the resistance during inflation is increased, resulting in inconvenience in use. In addition, the pressure bearing capacity of the pipe body is also related to the process of cutting the side of the pipe body. The gap of the cutting port is large, and the side pressure resistance is poor, which leads to a decrease in the pressure bearing capacity of the pipe body.

Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a pressure relief type check valve device that solves the drawbacks of existing one-way valves that are liable to cause abnormal pressure relief or gas backflow.

In order to achieve the above object, the present invention provides a pressure relief type check valve device including a valve body having a first port and a second port penetrating through the inside, the first port and the second port The passage between the two is a pressure passage; the first port is provided with a pressure control device; the side of the valve body has a pressure relief port communicating with the pressure passage, and the pressure relief port is installed with a pressure relief a pressure control device comprising: a closure member and a closure member; the closure member being fitted over an end face of the first port having a pressurized through hole connectable to the pressurized passage; The closing member is movably mounted inside the pressurized passage, and the diameter of the closing member is larger than the diameter of the pressurized through hole and smaller than the position thereof The length of the upper pressurized passage; when the outward pressure of the closing element is greater than the inward pressure, the closing element closes the pressurized through hole; when the outward pressure of the closing element is less than the inward pressure A closing element opens the pressurized through hole. With the pressure relief type check valve device of the present invention, the fluid can enter from the pressurized through hole in one direction, and the closing member can ensure that the fluid does not fall out of the pressurized through hole, compared with the valve core of the prior art. It is not easy to cause abnormal pressure relief or gas backflow, so it has higher reliability, and the requirements for materials and processes are relatively reduced, which helps to save costs.

A first aspect of the pressure relief control device of the present invention includes an elastic member, a pressing cover, and a jack; the pressing cover and the plunger are elastically mounted at the pressure relief port by the elastic member, and the upper end of the plunger The bottom portion is connected to the pressing cover, and the lower end portion of the jack is disposed under the pressure relief port; when the downward pressure of the jack is greater than the upward pressure, the lower end portion of the jack opens the pressure releasing port; When the downward pressure is less than the upward pressure, the lower end of the jack closes the pressure relief port. The pressure relief control device of the solution actively depressurizes by finger pressing, thereby facilitating bidirectional control of pressurization and decompression inside the container.

In a first aspect of the above pressure relief control device, the ejector rod includes a cylinder and a cake, the upper end of the cylinder is connected to the pressing cover, and the lower end is connected to the cake; the cake The body is disposed under the pressure relief port, and the diameter of the body is greater than the diameter of the pressure relief port. Since the general pressure relief port is arranged in a round shape, the cake body can be matched with the pressure relief port, and the diameter of the cake body is longer than the diameter of the pressure relief port, and the pressure relief port can be completely closed when the active pressure relief is not required. Of course, it is only preferred that the lower end portion of the ram is provided as a cake-like body, and it may be provided as a square body or the like as long as the pressure relief port can be completely closed when the active pressure relief is not required.

In the first aspect of the above pressure relief control device, the elastic member is a spring; the elastic member is sleeved outside the cylinder and disposed between the pressing cover and the end surface of the pressure relief port. The spring is a relatively easy and easy to install elastic member, and therefore, as a preferred embodiment of the present invention, the elastic member of the present invention is not excluded as an elastic member of another structure.

Alternatively, the elastic member may be attached under the ram to elastically support the ram.

The second solution of the above pressure relief control device comprises: a first screw cap and a thimble mounted inside the first screw cap; the first screw cap has an internal thread; the pressure relief port has the first spin The internal thread of the cover matches the external thread, the first cap is screwed onto the pressure relief port; the pressure relief port has a communicating intermediate passage and a side hole, the intermediate passage and the pressurization The channels are in communication; the thimble is located in the intermediate passage, which opens or closes the side holes based on the degree of rotation of the first cap and the pressure relief port.

In a second aspect of the above pressure relief control device, the pressure relief control device further includes a thimble supporting spring, the thimble supporting spring being located in the intermediate passage to support the thimble. Of course, if the thimble is directly attached to the first cap, the thimble support spring may not be needed.

A third solution of the above pressure relief control device includes: a second screw cap and a gasket installed inside the second screw cap; the second screw cap has an internal thread; the pressure relief port has the second The internal thread of the screw cap matches the external thread, so that a second cap is screwed onto the pressure relief port; the gasket opens or closes the pressure relief port based on a degree of rotation of the second cap with respect to the pressure relief port.

As a preferred embodiment of the above-described pressure control device, the closing member has a diaphragm substrate, and the outer side of the diaphragm substrate has a boss portion nestable on the pressurized through hole. In addition to such a structure, the closing member may be a ball or a bead as long as it is convenient to be installed in the pressurized passage and the pressurized through hole can be closed.

Advantageous Effects: The pressure relief type check valve device provided by the present invention has both a pressure control device and a pressure release control device. The pressure control device includes a closing member and a sealing member, and the fluid can enter from the pressurized through hole in one direction. The sealing element ensures that the fluid does not fall out of the pressurized through hole, and is less prone to abnormal pressure relief or gas backflow than the valve core of the prior art, thereby having higher reliability and increasing the maximum air pressure in the container. Value, and the requirements for materials and processes are relatively reduced, helping to save costs. The pressure relief control device can actively relieve pressure by finger pressing, thereby facilitating bidirectional control of pressurization and decompression inside the container.

DRAWINGS

1 is a schematic view showing the overall structure of a pressure relief type check valve device according to the first embodiment.

2 is a cross-sectional structural view of the pressure relief type check valve device according to the first embodiment.

Figure 3 is a schematic view of the A-direction structure of the closure member of Figure 2.

Fig. 4 is a schematic view showing the state of the pressure relief type check valve device of the first embodiment when it is pressurized.

Fig. 5 is a schematic view showing the state of the pressure relief type check valve device of the first embodiment when the pressure is released.

6 is a schematic structural view of a pressure relief type check valve device according to the second embodiment.

7 is a schematic structural view of a pressure relief type check valve device according to a third embodiment.

FIG. 8 is a schematic structural view of a pressure relief type check valve device according to Embodiment 4.

Figure 1 to Figure 6: 10-valve body, 11-first port, 12-second port, 13-pressurized passage, 14-pressure relief port, 22-closed element, 23-sealing element, 24-pressurized Through hole, 31-elastic element, 32-press cover, 33-column, 34-cake, 35- apron.

In Figure 7: 41 - first cap, 42 - thimble, 43 - thimble support spring, 51 - intermediate channel, 52 - side hole.

In Figure 8: 61 - second cap, 62 - gasket.

detailed description

The present invention will be further described below in conjunction with the drawings and embodiments in order to facilitate understanding of those skilled in the art.

Embodiment 1

Referring to FIG. 1 to FIG. 3 , an embodiment provides a pressure relief type check valve device including a valve body 10 having a first port 11 and a second port 12 penetrating through each other. The passage between the first port 11 and the second port 12 is a pressurizing passage 13; a pressurization control device is installed at the first port 11.

The pressure control device includes a closing member 22 and a sealing member 23; the sealing member 23 is fitted over the end surface of the first port 11 (the sealing member 23 may be a separate component assembled on the first port 11, or may be An end face of a port 11 is integrally formed) having a pressurized through hole 24 connectable with the pressurizing passage 13; the closing member 22 is elastically mounted inside the pressurizing passage 13, and the diameter of the closing member 22 is larger than The aperture of the pressurized through hole 24 is smaller than the diameter of the pressing passage 13 at the position where it is located (as shown in FIG. 2, the pressing passage 13 can be provided with a mounting groove having a relatively long diameter at the position to accommodate Closure element 22); when the outward pressure of the closure element 22 is greater than the inward pressure, the closure element 22 closes the pressurized through hole 24; when the outward pressure of the closure element 22 is less than the inward pressure The closing member 22 opens the pressurized through hole 24.

As shown in FIGS. 2 and 3, the closure member 22 has a diaphragm base having an outer side that is nestable on the pressurized through hole 24. In addition to such a structure, the closing member 22 may be a ball or a bead as long as it is convenient to be mounted in the pressurizing passage 13 and the pressurized through hole 24 can be closed.

The working principle of the pressure control device:

For example, in the case of refilling the container, the pressure relief type check valve device of the embodiment can be connected between the air pump and the container; in the state where the container is not pressurized, the closing member 22 is maintained at the initial position; When pressed, the closing element 22 is subjected to an outward pressure less than the inward pressure applied by the air pump, and the pressurized through hole 24 is opened. As shown in FIG. 4, the gas can enter the pressurized through hole 24 in one direction; After pressing, the closing member 22 is subjected to an outward pressure of the air pressure inside the pressurizing passage 13, closing the pressurized through hole 24, and ensuring that the gas does not fall out of the pressurized through hole 24, thereby having higher reliability. This embodiment can increase the maximum value of the gas pressure in the container, and the requirements for materials and processes are relatively reduced, which contributes to cost saving.

Referring to FIG. 1 and FIG. 2 , in a further preferred embodiment of the present embodiment, the side surface of the valve body 10 has a pressure relief port 14 communicating with the pressure passage 13 , and the pressure relief port 14 is installed with a drain. Pressure control device. The pressure relief control device comprises an elastic member 31, a pressing cover 32 and a jack; the jack includes a cylinder 33 and a cake 34, the upper end of which is connected to the pressing cover 32, and the lower end and the cake 34 is connected; the cake 34 is disposed under the pressure relief port 14 and has a diameter longer than the diameter of the pressure relief port 14. Since the general pressure relief port 14 is arranged in a circular shape, the cake 34 can be matched with the pressure relief port 14. The diameter of the cake 34 body is longer than the diameter of the pressure relief port 14 and can be effectively vented when no active pressure relief is required. The pressure port 14 is completely closed. Of course, it is only preferable that the lower end portion of the jack is provided as a cake, and it may be provided as a square or the like as long as the pressure relief port 14 can be completely closed when the active pressure relief is not required. The pressing cover 32 and the top rod are elastically mounted at the pressure relief opening 14 by the elastic member 31.

The elastic member 31 may specifically be a spring that is fitted outside the cylinder 33 and disposed between the pressing cover 32 and the end surface of the pressure relief opening 14. Of course, the elastic member 31 of the present embodiment is not excluded as an elastic member of other structures.

In order to further ensure airtightness, the pressure relief control device further includes a rubber ring 35; the rubber ring 35 is fitted over the cylinder 33 and located between the pressure relief port 14 and the cake body 34. The material of the apron 35 may be rubber, silica gel or the like. It is worth noting that if the design of the jack is to ensure airtightness, the apron 35 is only a preferred arrangement and not required.

The working principle of the pressure relief control device:

When the pressing cover 32 is not pressed, the downward pressure exerted by the jack is smaller than the upward pressure exerted by the pressing passage 13 on the jack and the elastic resistance (upward pressure) of the elastic member 31, and the lower end of the jack will be the pressure relief port. 14 is closed; when the pressing cover 32 is pressed, the downward pressure of the jack is greater than the upward pressure exerted by the pressing passage 13 on the jack and the elastic resistance of the elastic member 31, and the lower end of the jack opens the pressure releasing port 14 As shown in Figure 5. The pressure relief control device of the present embodiment can perform active pressure release by finger pressing, so that the present embodiment can realize two-way control of pressurization and decompression of the inside of the container.

Embodiment 2

As shown in FIG. 6, the pressure relief type check valve device proposed in the second embodiment is different from the first embodiment in that the elastic member 31 is connected under the jack to elastically support the jack. The working principle of the second embodiment is similar to that of the first embodiment, and details are not described herein again.

Embodiment 3

As shown in FIG. 7, the pressure relief type check valve device proposed in the third embodiment differs from the first embodiment and the second embodiment only in the design of the pressure relief control device. The pressure relief control device of the third embodiment includes the first a cap 41 and a thimble 42 mounted inside the first cap 41; the first cap 41 has an internal thread; the pressure relief port has an external thread matching the internal thread of the first cap 41, so that the first cap 41 is screwed onto the pressure relief port; the pressure relief port has a communicating intermediate passage 51 and a side hole 52, and the intermediate passage 51 is in communication with the pressure passage; the thimble 42 is located in the intermediate passage 51 based on the first screw cap 41 and the opposite The side opening 52 is opened or closed correspondingly to the degree of rotation of the pressure relief opening.

In an alternative, the pressure relief control device further includes a thimble support spring 43 located in the intermediate passage 51 to support the thimble 42. Of course, if the thimble 42 is directly fixed to the first cap 41, the thimble supporting spring 43 may not be required.

Embodiment 4

As shown in FIG. 8, the pressure relief type check valve device proposed in the fourth embodiment is different from the first, second and third embodiments only in the design of the pressure relief control device, and the pressure relief control of the fourth embodiment. The device includes a second screw cap 61 and a gasket 62 mounted inside the second screw cap 61; the second screw cap 61 has an internal thread; the pressure relief port has an external thread matching the internal thread of the second screw cap 61, The second screw cap 61 is screwed onto the pressure relief port; the gasket 62 opens or closes the pressure relief port based on the degree of rotation of the second screw cap 61 with respect to the pressure relief port.

In addition to the design schemes listed in the first embodiment to the fourth embodiment, the pressure relief control device may be other solutions, which are not enumerated here.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that for those of ordinary skill in the art, A number of variations and modifications may be made without departing from the spirit of the invention, and these are within the scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A pressure relief type check valve device comprising a valve body having a first port and a second port penetrating through the inside of the valve body, wherein the passage between the first port and the second port is a pressurized passage; a pressure control device is installed at the first port; a side of the valve body has a pressure relief port communicating with the pressure passage, and a pressure relief control device is installed at the pressure relief port; The pressurization control device includes a closing member and a sealing member; the sealing member is fitted at an end surface of the first port, and has a pressurized through hole connectable to the pressurizing passage; the closing member is movably mounted on In the interior of the pressurized passage, the diameter of the closing member is larger than the diameter of the pressurized through hole and smaller than the diameter of the pressurized passage at the position where it is located; when the outward pressure of the closing member is greater than the inward pressure, the closing member The pressurized through hole is closed; when the outward pressure applied to the closing member is small, the closing member opens the pressurized through hole.
A pressure relief type check valve device according to claim 1, wherein said pressure relief control device comprises an elastic member, a pressing cover and a jack; said pressing cover and said plunger are elastically mounted by said elastic member At the pressure relief port, the upper end of the jack is connected to the pressing cover, and the lower end of the jack is disposed under the pressure relief port; when the downward pressure of the jack is greater than the upward pressure, the lower end of the jack Opening the pressure relief port; when the downward pressure on the jack is less than the upward pressure, the lower end of the jack closes the pressure relief port.
The pressure relief type check valve device according to claim 2, wherein the ejector rod comprises a cylinder and a cake, the upper end of the cylinder is connected to the pressing cover, and the lower end is connected to the cake The shape is connected; the cake is disposed under the pressure relief port, and the diameter is longer than the diameter of the pressure relief port.
The pressure relief type check valve device according to claim 3, wherein the elastic member is a spring; the elastic member is fitted outside the cylinder and disposed at an end surface of the pressing cover and the pressure relief opening between.
The pressure relief type check valve device according to claim 2, wherein said elastic member is coupled under said ejector pin to elastically support said ram.
The pressure relief type check valve device according to claim 1, wherein the pressure relief control device comprises a first screw cap and a thimble mounted inside the first screw cap; the first screw cap has an inner Threading; the pressure relief port has an external thread matching the internal thread of the first screw cap, the first screw cap is screwed on the pressure relief port; the pressure relief port has a middle connected a passage and a side hole, the intermediate passage being in communication with the pressurizing passage; the thimble being located in the intermediate passage, which is opened based on a degree of rotation of the first cap and the pressure relief port or The side holes are closed.
The pressure relief type check valve device according to claim 6, wherein said pressure relief control device further comprises a thimble supporting spring, said thimble supporting spring being located in said intermediate passage to support said thimble.
A pressure relief type check valve device according to claim 1, wherein said pressure relief control means comprises a second screw cap and a gasket mounted inside the second screw cap; said second screw cap having An internal thread; the pressure relief port has an external thread matching the internal thread of the second screw cap, the second cap is screwed onto the pressure relief port; the gasket is based on the second The screw cap opens or closes the pressure relief port corresponding to the degree of rotation relative to the pressure relief port.
A pressure relief type check valve device according to claim 1, wherein said closing member has a diaphragm base, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 2, wherein said closing member has a diaphragm base, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 3, wherein said closing member has a diaphragm base, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 4, wherein said closing member has a diaphragm base, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 5, wherein said closing member has a diaphragm substrate, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 6, wherein said closing member has a diaphragm base, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 7, wherein said closing member has a diaphragm substrate, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve device according to claim 8, wherein said closing member has a diaphragm base, and an outer side of said diaphragm substrate has a projection nestable on said pressurized through hole Starting.
A pressure relief type check valve apparatus according to claim 1, wherein said closing member is a sphere.