CN208058045U - Manual pressure release type check-valves - Google Patents

Abstract

The utility model relates to a manual pressure relief check valve, the pressure control device of which comprises an elastic closing element and an interface pipe fitting, the first end surface of the elastic closing element is fixed in the middle of the second end surface of the connecting end of the interface pipe fitting, so the elastic closing element It is always in a fixed state, and only the part outside the middle is elastically deformed to open the air inlet at the connecting end of the interface pipe fitting, which avoids the problems of bending and snapping, and also avoids the problem of inconvenient installation.

Description

Manual Pressure Relief Check Valve

technical field

The utility model belongs to the technical field of check valves, in particular to a manual pressure relief check valve suitable for small pressurization equipment.

Background technique

As a mechanical component that can prevent the reverse movement of fluid, the check valve is widely used in mechanical equipment that needs to control the flow of fluid, such as mercury sphygmomanometers and other inflatable devices with air bags. Check valves are used.

The structure of a general check valve includes a valve body and a valve core installed on the main channel (pressurized channel) inside the valve body. The valve core is a tube structure, the material is usually synthetic rubber, one end of the tube body has an opening, the other end is a blind end, and the side of the tube body has a linear cut that runs through the tube, and the cut is normally closed. The working principle of this kind of check valve (take the check valve used when adding gas as an example) is: when pressurized, the air flow enters the first half of the main channel inside the valve body, and the air flow will be blocked by the valve core tube body. It will enter the interior of the pipe body through the open end of the pipe body and be blocked by the blind end of the pipe body. As the internal air pressure of the pipe body increases, the airflow will break through the cut hole on the side of the pipe body and enter the second half of the main channel, and flow to the main channel. The container such as the air bag connected to the second half of the channel is inflated; when the air flow continues to enter the container to increase the air pressure in the container, the air pressure will seal the cut opening on the side of the pipe body, thereby preventing the gas from flowing out of the main channel of the valve body. To achieve the effect of one-way gas entry and pressure maintenance.

The disadvantage of the above-mentioned check valve is that when the air pressure in the container increases to a certain level, the gas will break through the cut opening on the side of the pipe body, resulting in 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, so the pressure bearing capacity is relatively higher. However, if the hardness or wall thickness of the tube body is increased, the resistance when inflated will be 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. If the gap of the cut opening is large, the side pressure resistance capacity will be poor, resulting in a decrease in the pressure bearing capacity of the pipe body.

In the prior art, there is also a diaphragm check valve that can avoid the above-mentioned defects. Its main structure is to replace the above-mentioned valve body with a diaphragm, and the diaphragm is movably installed inside the pressurized channel close to the pressurized through hole. (the diameter of the diaphragm is longer than the diameter of the pressurized through hole and smaller than the diameter of the pressurized passage where it is located), which closes the pressurized through hole under normal conditions, and applies sufficient air pressure from the pressurized through hole The diaphragm can be pushed away to open the pressurized through hole, so as to pass gas into the pressurized channel for pressurization. The disadvantages of the diaphragm check valve are: (1) Since the diaphragm is only movably installed inside the pressurized channel, it is difficult to ensure that it is installed in the pressurized channel in an ideal vertical state in practical applications, resulting in installation It is inconvenient; (2) The diaphragm will move as a whole when the pressurization starts or after the pressurization is completed. Since the uniform force on each point of the diaphragm cannot be ensured, the diaphragm is prone to bending and jamming, which affects normal operation. use.

Utility model content

The main purpose of the utility model is to provide a manual pressure relief check valve to solve the problems of inconvenient installation, easy bending and jamming during use of the existing check valves.

In order to achieve the above purpose, the utility model provides a manual pressure relief check valve, which includes a valve body, the valve body has a first port and a second port that communicate with each other inside, and the first port and the second port The passage between them is a pressurized passage; a pressurized control device is installed at the first port; a pressure relief port communicated with the pressurized passage is provided on the side of the valve body, and a relief port is installed at the pressure relief port. pressure control device; the pressurization control device includes an elastic closure element and an interface pipe; the elastic closure element is located inside the pressurization channel close to the first port; one end of the interface pipe is an open end, and the other end of the interface pipe One end is a connection end connected to the first port of the valve body, and the connection end communicates with the opening end; the first end surface of the elastic closure element is fixed in the middle of the second end surface of the connection end of the interface pipe; The connecting end of the interface pipe fitting is provided with an air inlet through the first end surface and the second end surface of the connecting end outside the middle part; the elastic sealing element closes the air inlet, and can seal the air inlet after elastic deformation. The road opens.

In one solution of the present utility model, the air inlet is slanted outward from the middle of the connecting end, and one end slanted outward is opposite to the first end surface outside the middle of the elastic closure element.

In one solution of the present utility model, the air inlet and the longitudinal plane of the connecting end form an included angle of 45° to 60°.

In one of the proposals of the present utility model, the elastic sealing element is generally cake-shaped, and has a mounting protrusion in the middle of its first end face, and a corresponding mounting recess is provided in the middle of the second end face of the connecting end of the interface pipe fitting. The end of the installation protrusion has a barb, and the end of the installation groove is correspondingly provided with a barb groove; the installation protrusion is embedded in the installation groove to fix the first end surface of the elastic closure element on the The middle part of the second end surface of the connection end of the above-mentioned interface pipe fitting.

In one solution of the present utility model, there are two air inlets at the connection end of the interface pipe, and the two air inlets are symmetrical based on the central axis of the interface pipe.

In one solution of the present utility model, the periphery of the connection end of the interface pipe is welded or screwed to the first port of the valve body.

In one of the schemes of the present utility model, the pressure relief control device includes a spring, a pressing cover and a push rod; the pressing cover and the push rod are elastically installed at the pressure relief port through the spring, and the upper end of the push rod The lower end of the ejector rod is arranged under the pressure relief port; when the downward pressure on the ejector rod is greater than the upward pressure, the lower end of the ejector rod will open the pressure relief port; the ejector rod When the downward pressure received is less than the upward pressure, the lower end of the mandrel seals the pressure relief port.

The manual pressure relief check valve provided by the utility model has at least the following beneficial effects:

(1) The pressurization control device includes an elastic closure element and an interface pipe fitting. The first end surface of the elastic closure element is fixed in the middle of the second end surface of the connection end of the interface pipe fitting, so the elastic closure element is always in a fixed state. The part is elastically deformed to open the air inlet at the connecting end of the interface pipe fitting, avoiding the problems of bending and snapping, and also avoiding the problem of inconvenient installation.

(2) The air inlet is slanted outward from the middle of the connection end and opposite to the first end surface outside the middle of the elastic closure element, which can avoid the direct impact of the pressurized fluid on the elastic closure element and reduce the pressurization resistance.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the manual pressure relief check valve proposed in the embodiment.

Fig. 2 is a schematic structural view of the elastic closure element and the mouthpiece in Fig. 1 .

In the figure: 10-valve body, 11-first port, 12-second port, 13-pressurization channel, 14-pressure relief port, 20-elastic closing element, 21-installation protrusion, 30-interface fittings, 31 -open end, 32-connecting end, 33-intake duct, 34-installation groove, 41-spring, 42-press cover, 43-ejector rod.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

For a manual pressure relief check valve provided in the embodiment, please refer to Figure 1 and Figure 2. In the following description, based on Figure 1 and Figure 2, the first port/first end surface is relatively located in the right direction of Figure 1 or Figure 2 , the second port/second end surface is relatively located in the left direction of Figure 1 or Figure 2, the description of "first" and "second" is only for the convenience of understanding, not to indicate or imply that the device or element referred to must have a specific Orientation, construction and operation in a particular orientation, and therefore should not be construed as limiting the invention.

As shown in Figures 1 and 2, a manual pressure relief check valve provided by the embodiment includes a valve body 10, and the valve body 10 has a first port 11 and a second port 12 that communicate with each other inside, the first port 11 and the second port 12 The passage between the second ports 12 is a pressurized passage 13; a pressurized control device is installed at the first port 11; the side of the valve body 10 has a pressure relief port 14 communicated with the pressurized passage 13, and the pressure relief port 14 is installed There is a pressure relief control device; the pressurization control device includes an elastic closure element 20 and an interface pipe 30; the elastic closure element 20 is located inside the pressurization passage 13 near the first port 11; one end of the interface pipe 30 is an open end 31, and the interface pipe 30 The other end is the connection end 32 connected with the first port 11 of the valve body 10, and the connection end 32 communicates with the opening end 31; The connection end 32 of the interface pipe fitting 30 is provided with an air inlet 33 outside the middle part through the first end surface and the second end surface of the connection end; the elastic sealing element 20 closes the air inlet 33, and can be elastically deformed to enter The airway 33 is opened.

In this embodiment, the pressure control device includes an elastic closure element 20 and an interface pipe 30, the first end surface of the elastic closure element 20 is fixed in the middle of the second end surface of the connection end 32 of the interface pipe 30, so the elastic closure element 20 is always in a fixed position. In this state, only the parts other than the middle are elastically deformed to open the air inlet 33 at the connecting end of the interface pipe 30, which avoids the problems of bending and snapping, and also avoids the problem of inconvenient installation.

In a preferred solution, the air inlet 33 slant outwards from the middle of the connecting end 32 , and the slanted outward end is opposite to the first end surface outside the middle of the elastic closure element 20 . In this embodiment, the air inlet 33 obliquely protrudes outward from the middle of the connecting end and is opposite to the first end surface outside the middle of the elastic closure element 20, which can avoid the direct impact of the pressurized fluid on the elastic closure element 20 and reduce the pressure on the elastic closure element 20. pressure resistance.

As a preferred solution, the air inlet 33 forms an included angle of 45° to 60° with the longitudinal plane of the connecting end 32 , but it is not limited thereto.

As a preferred solution, the elastic closure element 20 is in the shape of a cake as a whole, which can be made of rubber or other elastic materials, and has a mounting protrusion 21 in the middle of its first end face, and a middle part of the second end face of the connecting end 32 of the mouthpiece 30. Corresponding to the installation groove 34, the end of the installation protrusion 21 has a barb, and the end of the installation groove 34 is correspondingly provided with a barb groove; the installation protrusion 21 is embedded in the installation groove 34, so that the elastic closure element 20 The first end surface is fixed in the middle of the second end surface of the connecting end 32 of the mouthpiece 30 .

In an optional solution of this implementation, there are two air inlets 33 at the connection end 32 of the interface pipe 30 , and the two air inlets 33 are symmetrical based on the central axis of the interface pipe 30 . Of course, there may be one or more air intake channels 33, but one is not preferred.

In this embodiment, the periphery of the connection end 32 of the interface pipe 30 is welded or screwed to the first port 11 of the valve body 10 . Wherein, the connection end 32 periphery of the interface pipe fitting 30 is welded with the first port 11 of the valve body 10 to ensure airtightness, and the connection end periphery of the interface pipe fitting 30 is threadedly connected with the first port 11 of the valve body 10 so that both removable.

The working principle of the pressurization control device of the present embodiment:

Taking gas filling to the container as an example, the manual pressure relief check valve of this embodiment can be connected between the air pump and the container; when the container is not pressurized, the elastic closure element 20 is kept at the initial position as a whole and the air intake The channel 33 is closed; when the container is pressurized, the air flow enters from the open end 31 of the interface pipe 30, then enters the air inlet 33 of the connecting end 32, and pressurizes the elastic sealing element 20, and the corresponding part of the elastic sealing element 20 occurs The deformation opens the closed air inlet channel 33, allowing the air flow to enter the pressurized channel 13 and finally into the container. After stopping the pressurization of the container, the elastic closing element 20 will return to the initial position and close the pressurizing through hole 24 under the outward pressure of the internal air pressure of the pressurizing passage 13, thereby avoiding the backflow of the airflow.

The pressure relief control device of the utility model can adopt the existing technology, and this embodiment only provides a feasible solution. For example as shown in Figure 1, the pressure relief control device includes a spring 41, a push cover 42 and a push rod 43; 42 connection, the lower end of the push rod 43 is set under the pressure relief port 14; when the downward pressure on the push rod 43 is greater than the upward pressure, the lower end of the push rod 43 will open the pressure relief port 14; When the downward pressure is less than the upward pressure, the lower end of the push rod 43 will seal the pressure relief port 14 .

How the pressure relief control works:

When the pressing cover 42 is not pressed, the downward pressure on the push rod 43 is smaller than the upward pressure applied to the push rod 43 by the pressurization passage 13 and the elastic resistance (upward pressure) of the spring 41, and the lower end of the push rod 43 will release The pressure port 14 is closed; when the pressing cover 42 is pressed, the downward pressure on the push rod 43 is greater than the upward pressure exerted on the push rod 43 by the pressurization channel 13 and the elastic resistance of the spring 41, and the lower end of the push rod 43 will release Pressure port 14 is opened. The pressure release control device of this embodiment can actively release pressure by pressing with fingers, so that this embodiment can realize two-way control of pressurization and decompression inside the container.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (7)

1. a kind of manual pressure release type check-valves, including valve body, the valve inner has interconnected first port and second Port, the channel between the first port and second port are pressurization passageway；Pressurized control is installed at the first port Device；The side of the valve body has the pressure relief opening being connected to the pressurization passageway, and pressure release control is equipped at the pressure relief opening Device；It is characterized in that：The pressurized control device includes flexible blocking member and interface pipe fitting；The flexible blocking member position Inside pressurization passageway at the first port；One end of the interface pipe fitting is open end, the other end of interface pipe fitting For the connecting pin being connect with the first port of the valve body, the connecting pin is connected to open end；The flexible blocking member First end face is fixed in the middle part of the second end face of the connecting pin of the interface pipe fitting；The connecting pin of the interface pipe fitting at middle part Except perforation connecting pin first end face and second end face be equipped with air intake duct；The flexible blocking member closes the air intake duct, And the air intake duct can be opened after elastic deformation occurs.

2. manual pressure release type check-valves according to claim 1, it is characterised in that：The air intake duct is in from connecting pin Portion direction tiltedly goes out outward, and the one end tiltedly gone out outward is opposite with the first end face except the middle part of the flexible blocking member.

3. manual pressure release type check-valves according to claim 2, it is characterised in that：The air intake duct and the connecting pin Fore-and-aft plane is in 45 ° to 60 ° angles.

4. manual pressure release type check-valves according to claim 1, it is characterised in that：It is described to state flexible blocking member entirety journey Pie, and have installation protrusion in the middle part of its first end face, is equipped with pair in the middle part of the second end face of the connecting pin of the interface pipe fitting The installation groove answered, the end for installing protrusion have barb, and the end of installation groove is correspondingly provided with barb slot；The installation protrusion In the embedded installation groove, the first end face of flexible blocking member is fixed on to the second of the connecting pin of the interface pipe fitting In the middle part of end face.

5. manual pressure release type check-valves according to claim 1, it is characterised in that：The connecting pin of the interface pipe fitting into There are two air flue tools, formed symmetrical of two air intake ducts based on the interface pipe fitting.

6. manual pressure release type check-valves according to claim 1, it is characterised in that：The connection end periphery of the interface pipe fitting It welds or is threadedly coupled with the first port of the valve body.

7. manual pressure release type check-valves according to any one of claims 1 to 6, it is characterised in that：The pressure release control dress It sets including spring, by gland and mandril；Gland and the mandril pressed is mounted on by the spring at the pressure relief opening, The upper end of mandril is connect with by gland, and the lower end of mandril is arranged below pressure relief opening；Downward pressure suffered by the mandril When more than upward pressure, the pressure relief opening is opened in the lower end of mandril；Downward pressure suffered by the mandril is less than pressure upwards When power, the pressure relief opening is closed in the lower end of mandril.