CN112253824B

CN112253824B - Safety relief valve

Info

Publication number: CN112253824B
Application number: CN202011139532.5A
Authority: CN
Inventors: 吴少华; 吴少雄; 王锦良; 洪瑜苏; 洪华彬
Original assignee: Huaguang Valve Co ltd
Current assignee: Huaguang Valve Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-05-17
Anticipated expiration: 2040-10-22
Also published as: CN112253824A

Abstract

The invention provides a safety pressure relief valve, wherein a ring is connected to the inner wall of one end, close to a valve body, of a pressure relief pipe, a first sealing plug capable of moving left and right to realize sealing with the ring or open pressure relief is installed in the pressure relief pipe, and an auxiliary pressure relief device with overlarge pressure and used for rapid pressure relief is installed on the inner wall, located above a connecting rod, of the valve body. When the air pressure in the equipment reaches a certain value, the valve clack can be pushed to move upwards, high-pressure air is discharged into the valve body, the connecting rod moves upwards along with the valve clack to drive the push rod to swing upwards, so that the push plate is pushed to extrude the compression rod, the first sealing plug moves along with the compression rod and is separated from the circular ring, the pressure of the high-pressure air is relieved from the pressure relief pipe, when the air pressure in the equipment is rapidly increased, the ejector rod pushes the ejection block to ascend, the ejection plate ascends, the second sealing plug is separated from the exhaust hole, the high-pressure air is rapidly discharged above the ejection plate and is discharged through the exhaust hole, the safety performance of the equipment is effectively guaranteed, and the safety valve has prominent substantive characteristics and remarkable progress.

Description

Safety relief valve

Technical Field

The invention relates to the technical field of valves, in particular to a safety relief valve.

Background

The pressure release valve is an essential auxiliary element in a pipeline system and is widely applied to boilers, petroleum and natural gas pipelines and water supply and drainage pipelines. The gas-liquid separator is often arranged at a height-making point or an elbow and the like, so that redundant gas in a pipeline is discharged, the use efficiency of the pipeline is improved, and the energy consumption is reduced. In the operation process of the heating and ventilation system and the heating and ventilation air-conditioning system, a plurality of adverse effects caused by gases (such as hydrogen, oxygen and the like) released by water during heating can damage the system and reduce the heat effect, and if the gases cannot be discharged in time, a plurality of adverse results can be generated. Such as: corrosion due to oxidation; forming an air bag in the radiator; hot water circulation is not smooth and balanced, so that some radiators are not hot locally; noise when the pipeline is running with air; vortex-void phenomenon of the circulation pump. And current relief valve is for preventing calorific loss, and the pressure release mouth sets up very little usually, is suitable for to some stable equipment of pressure lift, and can't effectively discharge high-pressure gas when equipment steps up the sudden change, and exhaust efficiency is low, can't discharge high-pressure gas fast, causes the pipe wall inflation to damage easily, for this reason, we propose a safety relief valve.

Disclosure of Invention

Therefore, in order to solve the above problems, the present invention provides a safety relief valve, which mainly aims to overcome the problem of low pressure relief efficiency of the conventional relief valve.

In order to realize the technical problem, the solution scheme adopted by the invention is as follows:

the utility model provides a safety relief valve, includes the valve body, through the detachable top cap of connecting on the valve body of screw, the lower extreme of valve body is connected with the flange who is used for being connected with pressure release equipment, the inner wall lower extreme of valve body is connected with the disk seat, installs the valve clack that forms seal structure with the disk seat in the valve body, and the upper end of valve clack is connected with the connecting rod that reciprocates in the valve body, one section lateral wall intercommunication that the valve body is located the disk seat top has the pressure release pipe that is used for the pressure release, the one end inner wall that the pressure release pipe is close to the valve body is connected with the ring, installs in the pressure release pipe and removes the realization and seal or open the first sealing plug of pressure release with the ring, the valve body is located the inner wall of connecting rod top and installs the too big supplementary pressure relief device who is used for quick pressure release of pressure.

The further improvement is that: the one end that first sealing plug is close to the valve body is connected with the pole that receives that runs through the ring, the other end that receives the pole supports on the lateral wall of push pedal, the lower extreme of push pedal articulates on the interior diapire of pressure release pipe, the other end lateral wall of push pedal articulates there is the push rod, the movable port that the other end joint of push rod was seted up on the connecting rod lateral wall, the one end that receives the pole was kept away from to first sealing plug is connected with the straight-bar, it has expanding spring to surround on the straight-bar, expanding spring's both ends are connected respectively on the lateral wall of guide ring and first sealing plug, the straight-bar activity is pegged graft on the guide ring, the guide ring passes through dead lever fixed connection on the inner wall of pressure release pipe, the one end that the valve body was kept away from to the pressure release pipe is seted up the passageway that high pressure gas discharged.

The further improvement is that: the push rod is arranged obliquely downwards, and the section of the movable opening is of a triangular structure for the push rod to swing up and down along with the connecting rod.

The further improvement is that: supplementary pressure relief device is including connecting the fixed plate in the inner wall of valve body and being located the connecting rod top, and the middle part of fixed plate is connected with the perforating hole, and the lower extreme of fixed plate is connected with the guide cylinder, and the lower extreme activity of guide cylinder is pegged graft in the recess that the connecting rod top was seted up, and the activity is pegged graft in the guide cylinder has the ejector pin of lower extreme connection on the recess diapire, and it has reset spring to surround on the ejector pin, and reset spring's both ends are connected respectively on the lower extreme of guide cylinder and the diapire of recess, a plurality of exhaust holes have been seted up on the fixed plate, are connected with the jacking board through a plurality of compression spring on the fixed plate, and the lower extreme middle part of jacking board is connected with the kicking block that receives that inserts in the perforating hole, and the lower extreme of jacking board is connected with the second sealing plug that inserts in the exhaust hole.

The further improvement is that: the top cover is provided with an exhaust port for exhausting the high-pressure gas exhausted from the exhaust hole to the outside.

The further improvement is that: the number of the exhaust holes is more than three, and the exhaust holes are distributed in an equidistant annular shape.

The further improvement is that: the valve seat is of a horn-shaped structure with the periphery inclined downwards towards the valve clack.

The further improvement is that: the side wall of the lower end of the valve clack is of an inclined surface structure which is matched with the valve seat to form surface contact sealing.

By adopting the technical scheme, the invention has the beneficial effects that: the safety relief valve can push the valve clack to move upwards after the air pressure in the equipment reaches a certain value, high-pressure air is discharged into the valve body, the connecting rod moves upwards along with the valve clack to drive the push rod to swing upwards, thereby pushing the push plate to extrude the pressed rod, so that the first sealing plug moves along with the pressed rod and is separated from the ring, realizing the pressure relief of high-pressure gas from the pressure relief pipe, when the air pressure in the device is increased rapidly, the valve clack moves up rapidly, the valve clack is jacked by the mandril and lifted by the jacking block, the jacking plate rises, the second sealing plug is separated from the exhaust hole, thereby realizing the rapid discharge of high-pressure gas to the upper part of the jacking plate and the discharge through the exhaust port, effectively ensuring the safety performance of the equipment, preventing the pipe explosion, and after the pressure in the equipment is recovered to be normal, under the resilience of the reset spring, the compression spring and the extension spring, the valve clack is pushed to descend to form sealing with the valve seat, and the valve has outstanding substantive characteristics and remarkable progress.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the portion B of FIG. 1 according to the present invention.

The reference numbers in the figures illustrate: the valve comprises a valve body 1, a connecting flange 2, a top cover 3, an exhaust port 31, a valve seat 4, a valve clack 5, a connecting rod 6, a movable port 61, a guide cylinder 62, a push rod 63, a return spring 64, a groove 65, a push rod 7, a pressure relief pipe 8, a circular ring 81, a first sealing plug 82, a pressure rod 83, a push plate 84, a straight rod 85, a guide ring 86, a fixing rod 87, a fixing plate 9, an exhaust hole 91, a jacking plate 10, a pressure receiving block 101 and a second sealing plug 102.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention will now be further described with reference to the accompanying figures 1-3 and specific examples.

A safety relief valve comprises a valve body 1, a top cover 3 detachably connected to the valve body 1 through screws, a connecting flange 2 used for being connected with a pressure relief device is connected to the lower end of the valve body 1, a valve seat 4 is connected to the lower end of the inner wall of the valve body 1, the valve seat 4 is of a horn-shaped structure with the periphery inclined downwards towards a valve clack 5, the side wall of the lower end of the valve clack 5 is of an inclined plane structure matched with the valve seat 4 to form surface contact sealing, sealing performance is improved, the valve clack 5 forming a sealing structure with the valve seat 4 is installed in the valve body 1, the upper end of the valve clack 5 is connected with a connecting rod 6 moving up and down in the valve body 1, a pressure relief pipe 8 used for pressure relief is communicated with one section of the side wall of the valve body 1 above the valve seat 4, a circular ring 81 is connected to the inner wall of one end of the pressure relief pipe 8, a first pressure relief sealing plug 82 capable of moving left and right to realize sealing or opening with the circular ring 81 is installed in the pressure relief pipe 8, an auxiliary pressure relief device with overlarge pressure for quickly relieving pressure is arranged on the inner wall of the valve body 1 above the connecting rod 6.

One end that first sealing plug 82 is close to valve body 1 is connected with the pressurized pole 83 that runs through ring 81, the other end that pressurized pole 83 supports on the lateral wall of push pedal 84, the lower extreme of push pedal 84 articulates on the interior diapire of pressure release pipe 8, the other end lateral wall of push pedal 84 articulates there is push rod 7, the movable port 61 that the other end joint of push rod 7 was seted up on the connecting rod 6 lateral wall, push rod 7 is slope setting downwards, the cross-section of movable port 61 is the triangle-shaped structure that supplies push rod 7 along with connecting rod 6 luffing motion, the one end that first sealing plug 82 kept away from pressurized pole 83 is connected with straight-bar 85, it has expanding spring to encircle on straight-bar 85, expanding spring's both ends are connected respectively on the lateral wall of guide ring 86 and the lateral wall of first sealing plug 82, straight-bar 85 activity is pegged graft on guide ring 86, guide ring 86 passes through dead lever 87 fixed connection on the inner wall of pressure release pipe 8, pressure release pipe 8 keeps away from the one end of valve body 1 and offers the passageway that supplies high-pressure gas to discharge.

The auxiliary pressure relief device comprises a fixing plate 9 which is connected to the inner wall of the valve body 1 and is positioned above the connecting rod 6, the middle part of the fixing plate 9 is connected with a through hole, the lower end of the fixing plate 9 is connected with a guide cylinder 62, the lower end of the guide cylinder 62 is movably inserted into a groove 65 which is arranged at the top of the connecting rod 6, an ejector rod 63 of which the lower end is connected to the bottom wall of the groove 65 is movably inserted into the guide cylinder 62, a return spring 64 is wound on the ejector rod 63, two ends of the return spring 64 are respectively connected to the lower end of the guide cylinder 62 and the bottom wall of the groove 65, a plurality of exhaust holes 91 are arranged on the fixing plate 9, the number of the exhaust holes 91 is more than three, the exhaust holes 91 are distributed in an equidistant annular shape, the fixing plate 9 is connected with a jacking plate 10 through a plurality of compression springs, the middle part of the lower end of the jacking plate 10 is connected with a jacking block 101 which is inserted into the through hole, the lower end of the jacking plate 10 is connected with a second sealing plug 102 which is inserted into the exhaust hole 91, the top cover 3 is provided with an exhaust port 31 for discharging the high-pressure gas discharged from the exhaust hole 91 to the outside.

The safety relief valve can push the valve clack 5 to move upwards when the air pressure in the equipment reaches a certain value, high-pressure gas is discharged into the valve body 1, the connecting rod 6 moves upwards to drive the push rod 7 to swing upwards, so that the push plate 84 is pushed to extrude the compression rod 83, the first sealing plug 82 moves along with the first sealing plug and is separated from the circular ring 81, the pressure of the high-pressure gas is relieved from the pressure relief pipe 8, when the air pressure in the equipment is increased rapidly, the valve clack 5 moves upwards rapidly, the ejection block 101 is ejected by the ejector rod 63 to lift, the lifting plate 10 lifts, the second sealing plug 102 is separated from the exhaust hole 91, the high-pressure gas is discharged above the lifting plate 10 rapidly and is discharged through the exhaust hole 31, the safety performance of the equipment is effectively guaranteed, pipe explosion is prevented, when the pressure in the equipment is recovered to be normal, the valve clack 5 is pushed to descend under the resilience force of the return spring 64, the compression spring and the expansion spring to form sealing with the valve seat 4, has prominent substantive features and remarkable progress.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a safety relief valve, includes valve body (1), through detachable top cap (3) of connecting on valve body (1) of screw, the lower extreme of valve body (1) is connected with flange (2) that are used for being connected with pressure relief equipment, its characterized in that: the inner wall lower extreme of valve body (1) is connected with disk seat (4), installs valve clack (5) that forms seal structure with disk seat (4) in valve body (1), and the upper end of valve clack (5) is connected with connecting rod (6) that reciprocate in valve body (1), one section lateral wall intercommunication that valve body (1) is located disk seat (4) top has pressure release pipe (8) that is used for the pressure release, the one end inner wall that pressure release pipe (8) are close to valve body (1) is connected with ring (81), installs first sealing plug (82) that can move about in pressure release pipe (8) and realize sealing with ring (81) or open the pressure release, the one end that first sealing plug (82) are close to valve body (1) is connected with compression pole (83) that runs through ring (81), and the one end of compression pole (83) links to with first sealing plug (82), and the other end of compression pole (83) supports on the lateral wall of push pedal (84), the lower end of a push plate (84) is hinged on the inner bottom wall of a pressure relief pipe (8), the side wall of the other end of the push plate (84) is hinged with a push rod (7), one end of the push rod (7), far away from the push plate (84), is connected with a movable opening (61) arranged on the side wall of a connecting rod (6) in a clamping manner, one end of a first sealing plug (82), far away from a pressed rod (83), is connected with a straight rod (85), a telescopic spring is wound on the straight rod (85), the two ends of the telescopic spring are respectively connected with the side wall of a guide ring (86) and the side wall of the first sealing plug (82), the straight rod (85) is movably inserted on the guide ring (86), the guide ring (86) is fixedly connected on the inner wall of the pressure relief pipe (8) through a fixing rod (87), one end, far away from a valve body (1), of the pressure relief pipe (8) is provided with a channel for discharging high-pressure gas, the push rod (7) is arranged downwards in an inclined manner, the section of the movable opening (61) is of a triangular structure for the push rod (7) to swing up and down along with the connecting rod (6), the pressure relief valve is characterized in that an auxiliary pressure relief device with overlarge pressure for rapid pressure relief is mounted on the inner wall of the valve body (1) above the connecting rod (6), the auxiliary pressure relief device comprises a fixing plate (9) connected to the inner wall of the valve body (1) and located above the connecting rod (6), a through hole is connected to the middle of the fixing plate (9), a guide cylinder (62) is connected to the lower end of the fixing plate (9), the lower end of the guide cylinder (62) is movably inserted into a groove (65) formed in the top of the connecting rod (6), a push rod (63) with the lower end connected to the bottom wall of the groove (65) is movably inserted into the guide cylinder (62), a return spring (64) is wound on the push rod (63), two ends of the return spring (64) are respectively connected to the lower end of the guide cylinder (62) and the bottom wall of the groove (65), a plurality of exhaust holes (91) are formed in the fixing plate (9), and the number of the exhaust holes (91) is more than three, and a plurality of exhaust holes (91) are the equidistance annular and distribute, are connected with jacking board (10) through a plurality of compression spring on fixed plate (9), and the lower extreme middle part of jacking board (10) is connected with and inserts receiving kicking block (101) in the through-hole, and the lower extreme of jacking board (10) is connected with and inserts a plurality of corresponding second sealing plugs (102) in a plurality of exhaust holes (91), offer on top cap (3) will follow exhaust hole (91) exhaust high-pressure gas and discharge to outside gas vent (31).

2. The safety relief valve according to claim 1, characterized in that: the valve seat (4) is of a horn-shaped structure with the periphery inclined downwards towards the valve clack (5).

3. The safety relief valve according to claim 2, characterized in that: the side wall of the lower end of the valve clack (5) is of an inclined plane structure which is matched with the valve seat (4) to form surface contact sealing.