CN210510408U

CN210510408U - Safety valve

Info

Publication number: CN210510408U
Application number: CN201920447926.3U
Authority: CN
Inventors: 丁超超
Original assignee: ZHEJIANG CHAOCHAO SAFETY VAVLE MANUFACTURING CO LTD
Current assignee: ZHEJIANG CHAOCHAO SAFETY VAVLE MANUFACTURING CO LTD
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-05-12
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a safety valve, it is including the valve body that has air inlet and pressure release mouth, the valve rod, the valve cap, seal gasket, and elastic component, wherein the valve cap is provided with the step in order to form linkage segment and extension section, valve rod movably sets up in the valve body, the linkage segment of valve cap is connected in the valve body, the elastic component cup joints in the valve rod, seal gasket sets up between the head of valve rod and air inlet, thereby the both ends of elastic component support respectively in the head of valve rod and the step of valve cap for seal gasket seals the air inlet under the ordinary pressure state and provides the power that resets, under the superpressure state, the valve rod is at the extension section internal motion of valve cap, the setting of extension section provides the protection to the motion of valve rod, make the valve rod can not receive external. The utility model discloses with the motion stroke restriction of valve rod inside the device, avoided external object to cause the interference to the valve rod motion, improved pressure release speed simultaneously.

Description

Safety valve

Technical Field

The utility model relates to a safety valve.

Background

The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value.

However, the existing safety valve has some defects in structural design. In the prior art, an air inlet is formed in an air inlet end of a valve body of the safety valve, a through hole for a valve rod to pass through is formed in a non-air inlet end of the valve body, when the safety valve is switched to an open state, an end portion of the valve rod can pass through the through hole to move to the outside of the valve body, so that the movement of the valve rod can be interfered by an external object, adverse effects are caused on normal opening of the safety valve, and meanwhile, the structure also provides higher requirements for installation conditions. In addition, the pressure relief channel of the safety valve is not reasonable in design and is not beneficial to rapid pressure relief.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a relief valve has solved above-mentioned problem to a certain extent, and the motion stroke of valve rod is restricted inside the device, has avoided external object to cause the interference to the valve rod motion, has improved pressure release speed simultaneously.

In order to achieve the above object, the present invention provides a safety valve, which includes:

valve body, valve rod, valve cap, seal gasket and elastic component with air inlet and pressure release mouth, wherein the valve cap is provided with the step in order to form linkage segment and extension section, valve rod movably sets up in the valve body, the linkage segment of valve cap connect in the valve body, the elastic component cup joint in the valve rod, seal gasket sets up the head of valve rod with between the air inlet, the both ends of elastic component support respectively in the head of valve rod with thereby the step of valve cap does seal gasket seals under the ordinary pressure state the air inlet provides the power that resets, under the superpressure state, the valve rod is in the extension section internal motion of valve cap, it is right to extend the setting of section the motion of valve rod provides the protection, makes the valve rod can not receive external object's interference at flexible in-process.

Under the normal pressure state, the sealing gasket closes the air inlet under the action of the valve rod and the elastic piece, so that the safety valve is in a normally closed state; under the overpressure state, media in equipment or a pipeline impact the sealing gasket, the elastic piece is compressed under the action of the overpressure media, the valve rod moves towards the extending section of the valve cap, and the air inlet is opened and communicated to the pressure relief opening, so that the safety valve is switched to an opening state to relieve pressure.

According to a preferred embodiment of the present invention, the head of the valve stem has a recess, the sealing gasket is embedded in the recess, so that the sealing gasket is firmly connected to the head of the valve stem.

Preferably, the sealing gasket is made of rubber material.

Preferably, the pressure release port is a round hole and is arranged on the side wall of the valve body, and the design of the round hole can improve the pressure release speed to a greater extent and is more favorable for the valve body to keep the structural strength.

Preferably, the upper end face of the air inlet is provided with a ring of flange, and the flange is suitable for being in contact with the sealing gasket, so that the sealing performance of the safety valve in a normally closed state is improved.

The above and other objects, features and advantages of the present invention will be further apparent from the following detailed description and the accompanying drawings.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention;

fig. 2 is an exploded view of a preferred embodiment according to the present invention;

fig. 3 is a cross-sectional view of a preferred embodiment according to the present invention;

FIG. 4 is an enlarged schematic view of a bonnet according to a preferred embodiment of the invention;

FIG. 5 is a schematic front view of a bonnet according to a preferred embodiment of the invention;

FIG. 6 is a cross-sectional view taken along A-A of FIG. 5;

in the figure: a valve body 10; an air inlet 11; a pressure relief port 12; a flange 13; a valve stem 20; a head portion 21; a valve cap 30; a step 31; a connecting section 32; an extension 33; a sealing gasket 40; the elastic member 50.

Detailed Description

The following description will be further described with reference to the accompanying drawings and specific embodiments, and it should be noted that any combination of the following described embodiments or technical features can be used to form a new embodiment without conflict.

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 6 of the drawings, a safety valve according to a preferred embodiment of the present invention will be explained in the following description, which includes a valve body 10, a valve stem 20, a bonnet 30, a sealing gasket 40, and an elastic member 50. The valve body 10 has an air inlet 11 and a pressure relief port 12, the bonnet 30 is provided with a step 31 to form a connection section 32 and an extension section 33, the valve stem 20 is movably disposed in the valve body 10, and the connection section 32 of the bonnet 30 is connected to the valve body 10. The elastic member 50 is sleeved on the valve stem 20, the sealing gasket 40 is disposed between the head 21 of the valve stem 20 and the air inlet 11, and two ends of the elastic member 50 respectively abut against the head 21 of the valve stem 20 and the step 31 of the bonnet 30 so as to provide a restoring force for the sealing gasket 40 to seal the air inlet 11 under a normal pressure state.

In the present embodiment, the suitable medium of the safety valve is air, but it is easily understood by those skilled in the art that the specific kind of the suitable medium is not limited in the present invention.

Under normal pressure, the sealing gasket 40 closes the gas inlet 11 under the action of the valve rod 20 and the elastic element 50, so that the safety valve is in a normally closed state, and the gas medium cannot be discharged through the safety valve; when the pressure value in the system exceeds a specified range, the gas medium in the device or pipeline impacts the sealing gasket 40, the elastic element 50 is compressed under the action of the overpressure medium, the valve rod 20 moves towards the extension section 33 of the valve cap 30, and the air inlet 11 is opened and communicated to the pressure relief opening 12, so that the safety valve is switched to an open state for pressure relief.

It is worth mentioning that, under an overpressure condition, the valve stem 20 moves in the extension 33 of the bonnet 30, and the extension 33 is configured to protect the valve stem 20 from moving, so that the valve stem 20 is not interfered by a foreign object during the extension and retraction process.

Preferably, the head 21 of the stem 20 has a recess in which the sealing gasket 40 is fitted, so that the sealing gasket 40 is firmly attached to the head 21 of the stem 20.

Preferably, the sealing gasket 40 is a rubber material.

It should also be mentioned that the pressure relief port 12 is a circular hole and is disposed on the side wall of the valve body 10. The design of round hole can improve pressure release speed to a great extent, and compare in the design of milling flutes and be more favorable to valve body 10 keeps structural strength.

Preferably, the number of the circular holes is 3, and the circular holes are respectively and uniformly arranged on the side wall of the valve body 10.

Preferably, the upper end face of the air inlet 11 is provided with a ring of flange 13, and the flange 13 is suitable for contacting with the sealing gasket 40, so as to improve the sealing performance of the safety valve in a normally closed state.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. A safety valve, comprising:

valve body, valve rod, valve cap, seal gasket and elastic component with air inlet and pressure release mouth, wherein the valve cap is provided with the step in order to form linkage segment and extension section, valve rod movably sets up in the valve body, the linkage segment of valve cap connect in the valve body, the elastic component cup joint in the valve rod, seal gasket sets up the head of valve rod with between the air inlet, the both ends of elastic component support respectively in the head of valve rod with thereby the step of valve cap does seal gasket seals under the ordinary pressure state the air inlet provides the power that resets, under the superpressure state, the valve rod is in the extension section internal motion of valve cap.

2. The safety valve of claim 1, wherein the head of the valve stem has a recess in which the sealing gasket is fitted.

3. A safety valve according to claim 1 or 2, wherein the sealing gasket is of rubber material.

4. The safety valve of claim 1, wherein the relief port is a circular hole disposed in a side wall of the valve body.

5. The safety valve according to claim 1, characterized in that the upper end face of the gas inlet is provided with a ring of flange suitable for coming into contact with the sealing gasket.