CN210318756U

CN210318756U - Pilot-operated pressure relief valve

Info

Publication number: CN210318756U
Application number: CN201921233902.4U
Authority: CN
Inventors: 李先明; 谢雄; 李光明; 熊文丰; 邹晓波
Original assignee: Zhejiang Huizheng Automatic Control Valve Co ltd
Current assignee: Huizheng automatic control valve group Co., Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-14
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a guide's formula pressure relief valve, including relief valve body, the passageway before the valve, get pressure mouth, governing valve screw rod, siphunculus and main valve lamella, relief valve body bottom is seted up there is the passageway before the valve, interior base plate inboard and the laminating of side ring piece, and side ring piece and top working disc interconnect, be provided with the second air chamber in the bottom working disc, and terminal surface laminating under inboard bottom surface of bottom working disc and the horizontal plate to the horizontal plate bottom mounting has the main valve lamella, main valve lamella bottom and the laminating of passageway top before the valve. This guide's formula pressure relief valve adopts neotype structural design for this device can utilize pressure before the valve, carries out automatic triggering to the structure that has regulatory function in the device, adjusts the structure like this and does not contact with the direct large tracts of land of medium in equipment or the pipeline, makes adjusting pressure lower, has avoided the condition that regulating accuracy is low under the big pressure, adjusts structure and medium contactless simultaneously, reduces the possibility of leaking, has improved the holistic sealing performance of device.

Description

Pilot-operated pressure relief valve

Technical Field

The utility model relates to a pressure relief valve technical field specifically is a guide's formula pressure relief valve.

Background

Pressure relief valve is one kind and utilizes the installing the system internal pressure, carry out automatic opening and close, thereby keep the invariable valve of installing the system internal pressure, be a comparatively common valve, install on confined equipment and pipeline more, play and avoid the real-time pressure in the installing the system to exceed the relief valve and set pressure, lead to the surprise accidents such as sealed equipment and pipeline internal pressure and emergence leakage and explosion, pressure relief valve mainly has spring and lever two kinds, the material is mostly metal, the primary structure has the valve body, the valve gap, valve clack and spring etc..

With the continuous installation and use of the pressure relief valve, the existing spring type pressure relief valve has the following problems in the long-term use process:

1. the adjusting structure of the existing spring type pressure relief valve is directly connected with closed equipment and a pipeline, so that the pressure of the closed equipment and the pipeline directly acts on the adjusting structure, the adjusting pressure is high, and the adjusting operation with high precision cannot be carried out;

2. and the pilot valve film of traditional spring pressure relief valve is breakable to sealed only adopt the sealed pad of rubber material to seal, sealing performance is relatively poor.

Therefore, a pilot-operated pressure relief valve is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guide's formula pressure relief valve to it is higher to provide adjusting pressure in solving above-mentioned background art, can't carry out the higher regulation operation of precision, the relatively poor problem of sealing performance.

In order to achieve the above object, the utility model provides a following technical scheme: a pilot-operated pressure relief valve comprises a relief valve body, a valve front channel, a pressure taking port, an adjusting valve screw, a through pipe and a main valve clack, wherein the bottom of the relief valve body is provided with the valve front channel, the side of the valve front channel is provided with the pressure taking port, the pressure taking port is fixed with the bottom end of a connecting pipe, the top end of the connecting pipe is fixed on a small control valve, the small control valve is fixed at the bottom of a top working disc, the bottom end of the small control valve is fixed on the through pipe, the bottom end of the through pipe is fixed on the bottom working disc, the bottom working disc is arranged at the top of the relief valve body, the top working disc is provided with a control cap, a first air chamber is arranged in the top working disc, the adjusting valve screw is arranged in the control cap, the bottom end of the adjusting valve screw is attached to the top of a bottom sliding block, the bottom sliding block is, the bottom end of the inner bolt is fixedly provided with a small valve core, the small valve core is attached to the top of the through pipe, the inner bolt penetrates through the inner base plate, the inner side of the inner base plate is attached to the side ring piece, the side ring piece is connected with the top working disc, the bottom working disc is internally provided with a second air chamber, the inner bottom surface of the bottom working disc is attached to the lower end face of the horizontal plate, the bottom end of the horizontal plate is fixedly provided with a main valve flap, and the bottom end of the main valve flap is attached to the top of the front channel of the valve.

Preferably, the top working disc is formed by fixing a shell which is symmetrically distributed up and down through bolts, the edge of the shell which is symmetrically distributed up and down of the top working disc is clamped and attached to the outer edge of the side ring piece which is symmetrically distributed about the center of the top working disc, the inner edge of the side ring piece made of spring steel is clamped and fixed by the inner substrate which is symmetrically distributed about the side ring piece, and meanwhile, an arc-shaped protruding structure is arranged at the part, located between the inner wall of the top working disc and the edge of the inner substrate, of the side ring piece.

Preferably, the control cap comprises sealed cap and unable adjustment base, and sealed cap installs at the unable adjustment base top to unable adjustment base passes through the bolt fastening and pushes up the working disc top, and sealed cap and unable adjustment base are connected for the block simultaneously.

Preferably, the adjusting valve screw rod is in threaded connection with the fixed base, the bottom end of the adjusting valve screw rod is attached to the groove in the top of the bottom sliding block, and the bottom sliding block is in sliding connection with the fixed base.

Preferably, the small valve core is fixed with the inner base plate through an inner bolt, the small valve core penetrates through the bottom of the top working plate and the top of the small control valve, the small valve core is in sliding connection with a hole formed in the top of the small control valve, and meanwhile, the conical protruding structure at the bottom of the small valve core is attached to the central hole of the through pipe.

Preferably, a channel with an inverted T-shaped section is formed in the small control valve in the middle of the bottom of the small valve core and the top of the connecting guide pipe, the top opening of the T-shaped channel is communicated with a hole in the bottom of a top working plate through which the small valve core penetrates, the diameter of the hole in the bottom of the top working plate is larger than that of the small valve core, and meanwhile the small control valve is connected with the top working plate in a welding mode.

Preferably, the horizontal plate is welded with the main valve flap, the outer side of the top of the main valve flap is tightly attached to the inner wall of the hole formed in the top of the pressure relief valve body, the hole formed in the top of the main valve flap is in sliding connection with the hole formed in the top of the pressure relief valve body, and the main valve flap is inverted 'T-shaped' in front view section.

Preferably, the bottom end of the main valve flap is provided with 2 disc-shaped structures from top to bottom, the diameters of the disc-shaped structures are larger than the top opening of the front valve channel and equal to the top opening of the front valve channel, and the center of the main valve flap and the center of the front valve channel are positioned on the same vertical plane.

Compared with the prior art, the beneficial effects of the utility model are that: the pilot-operated pressure relief valve adopts a novel structural design, so that the device can automatically trigger a structure with an adjusting function in the device by utilizing the pressure before the valve, the adjusting structure is not directly contacted with a medium in equipment or a pipeline in a large area, the adjusting pressure is lower, the condition of low adjusting precision under large pressure is avoided, meanwhile, the adjusting structure is not contacted with the medium, the possibility of leakage is reduced, and the integral sealing performance of the device is improved;

1. the structure formed by the connecting conduit, the small control valve, the top working disc, the first air chamber, the adjusting valve screw, the bottom sliding block, the working spring, the inner bolt, the small valve core, the through pipe, the inner base plate and the side ring plate can utilize the pressure at the front channel of the valve to trigger work, so that the adjustment is convenient, the pressure is small and the precision is high;

2. the structure formed by the bottom working disc, the second air chamber and the horizontal plate can control the opening and closing of the main valve flap by utilizing the change of air pressure after the adjusting structure is triggered, so that the whole sealing performance of the device is better.

Drawings

Fig. 1 is a schematic view of the front cross-sectional structure of the present invention;

FIG. 2 is a schematic view of the front cross-sectional structure of the top working plate of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

fig. 4 is a schematic structural view of the control cap of the present invention.

In the figure: 1. a relief valve body; 2. a pre-valve passage; 3. a pressure taking port; 4. connecting a conduit; 5. a small control valve; 6. a working plate is pushed; 7. a control cap; 701. a sealing cap; 702. a fixed base; 8. a first air chamber; 9. adjusting a valve screw; 10. a bottom slider; 11. a working spring; 12. an inner bolt; 13. a small valve core; 14. pipe passing; 15. an inner substrate; 16. a side ring piece; 17. a bottom work plate; 18. a second air chamber; 19. a horizontal plate; 20. a main valve flap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a pilot-operated pressure relief valve comprises a relief valve body 1, a valve front channel 2, a pressure taking port 3, a connecting conduit 4, a small control valve 5, a top working disc 6, a control cap 7, a first air chamber 8, a regulating valve screw 9, a bottom sliding block 10, a working spring 11, an inner bolt 12, a small valve core 13, a through pipe 14, an inner base plate 15, a side ring piece 16, a bottom working disc 17, a second air chamber 18, a horizontal plate 19 and a main valve 20, wherein the bottom of the relief valve body 1 is provided with the valve front channel 2, the side of the valve front channel 2 is provided with the pressure taking port 3, the pressure taking port 3 is fixed with the bottom end of the connecting conduit 4, the top end of the connecting conduit 4 is fixed on the small control valve 5, the small control valve 5 is fixed at the bottom of the top working disc 6, the bottom of the small control valve 5 is fixed with the through pipe 14, the bottom end of the through pipe 14 is fixed on the bottom working disc 17, the top working disk 6 is provided with a control cap 7 at the top, a first air chamber 8 is arranged in the top working disk 6, a regulating valve screw 9 is arranged in the control cap 7, the bottom end of the regulating valve screw 9 is attached to the top of a bottom slider 10, the bottom slider 10 is arranged in the control cap 7, a working spring 11 is fixed at the bottom end of the bottom slider 10, the bottom end of the working spring 11 is fixed on an inner bolt 12, a small valve core 13 is fixed at the bottom end of the inner bolt 12, the small valve core 13 is attached to the top of a through pipe 14, the inner bolt 12 penetrates through an inner base plate 15, the inner side of the inner base plate 15 is attached to a side ring piece 16, the side ring piece 16 is connected with the top working disk 6, a second air chamber 18 is arranged in the bottom working disk 17, the inner side bottom surface of the bottom working disk 17 is attached to the lower end surface of a horizontal plate 19, a main valve piece 20 is fixed at the bottom.

In this example, the top working disk 6 is composed of shells which are symmetrically distributed up and down and fixed by bolts, the edges of the shells which are symmetrically distributed up and down of the top working disk 6 are clamped and attached with the outer edges of the side ring sheets 16 which are symmetrically distributed about the center of the top working disk 6, and the inner edge of the side ring piece 16 made of spring steel is clamped and fixed by the inner base plate 15 which is symmetrically distributed about the side ring piece 16, meanwhile, the part of the side ring piece 16, which is positioned between the inner wall of the top working disk 6 and the edge of the inner substrate 15, is provided with an arc-shaped convex structure, the above-mentioned structure design makes the inner base plate 15 and the side ring plate 16 divide the first air chamber 8 in the top working plate 6 into two independent spaces, which is convenient to use the force between the pressure transmitted by the connecting conduit 4 and the working spring 11 to make the side ring plate 16 deform, resulting in the position of the inner base plate 15 changing in the vertical direction, so that the small valve core 13 connected with the inner base plate 15 controls the air pressure in the bottom working plate 17 through the through pipe 14;

the control cap 7 consists of a sealing cap 701 and a fixed base 702, the sealing cap 701 is installed at the top of the fixed base 702, the fixed base 702 is fixed at the top of the top working plate 6 through bolts, and meanwhile, the sealing cap 701 and the fixed base 702 are in clamping connection;

the adjusting valve screw 9 is in threaded connection with the fixed base 702, the bottom end of the adjusting valve screw 9 is attached to a groove in the top of the bottom slider 10, and the bottom slider 10 is in sliding connection with the fixed base 702, so that the adjusting valve screw 9 can rotate in the fixed base 702 and change the position in the vertical direction, and the pressure applied to the working spring 11 can be adjusted by pushing the bottom slider 10 to slide in the fixed base 702 during displacement, so that the force applied to the inner substrate 15 by the working spring 11 can be adjusted;

the small valve core 13 is fixed with the inner base plate 15 through the inner bolt 12, the small valve core 13 penetrates through the bottom of the top working plate 6 and the top of the small control valve 5, the small valve core 13 is in sliding connection with a hole formed in the top of the small control valve 5, meanwhile, a conical protruding structure at the bottom of the small valve core 13 is attached to a central hole of the through pipe 14, the small valve core 13 can move in the vertical direction along with the inner base plate 15 through the structural design, and opening and closing of the central hole of the through pipe 14 can be controlled through displacement;

the bottom of the small valve core 13 and the small control valve 5 in the middle of the top of the connecting conduit 4 are internally provided with a T-shaped channel with an inverted cross section in a front view shape, the top opening of the T-shaped channel is communicated with a hole in the bottom of the top working disc 6 through which the small valve core 13 penetrates, the diameter of the hole in the bottom of the top working disc 6 is larger than that of the small valve core 13, and the small control valve 5 and the top working disc 6 are connected in a welding manner;

the horizontal plate 19 is welded with the main valve flap 20, the outer side of the top of the main valve flap 20 is tightly attached to the inner wall of a hole formed in the top of the pressure relief valve body 1, the main valve flap 20 is in sliding connection with the hole formed in the top of the pressure relief valve body 1, the front section of the main valve flap 20 is in an inverted T shape, and the horizontal plate 19 can drive the main valve flap 20 to move in the vertical direction due to the structural design;

the bottom end of main valve flap 20 is provided with 2 disc-shaped structures from top to bottom, the diameter of each disc-shaped structure is larger than the top opening of pre-valve channel 2 and equal to the diameter of the top opening of pre-valve channel 2, the center of main valve flap 20 and the center of pre-valve channel 2 are on the same vertical plane, and the structural design enables main valve flap 20 to effectively seal the top opening of pre-valve channel 2.

The working principle is as follows: when the device is used, firstly, the bottom of the valve body 1 of the pressure relief valve in the figure 1 is connected with pressure equipment or a pipeline through a preset threaded hole by using a bolt, and a pressure relief opening arranged on the right side of the valve body 1 of the pressure relief valve is also connected with a discharge structure through the preset threaded hole by using the bolt;

then the sealing cap 701 in fig. 4 is taken down from the fixed base 702, the adjusting valve screw 9 is rotated to change the position direction of the adjusting valve screw 9 in the vertical direction, when the bottom end of the adjusting valve screw 9 moves upwards, the pressure applied to the working spring 11 by the bottom slider 10 becomes smaller, the working spring 11 extends, the pressure applied downwards to the inner base plate 15 decreases, and the working spring 11 pushes the bottom slider 10 to slide upwards under the action of the self elastic force and always contact with the bottom of the adjusting valve screw 9, on the contrary, when the bottom end of the adjusting valve screw 9 moves downwards, the bottom slider 10 is pushed to slide downwards and the pressure applied to the working spring 11 becomes larger, the working spring 11 is compressed, the pressure applied downwards to the inner base plate 15 increases, the pressure value which must be reached by adjusting the pressure in the space below the inner base plate 15 and the side ring 16 to push the inner base plate 15 and the side ring 16 to move upwards is achieved, the, at the moment, the elasticity of the working spring 11 pushes the small valve core 13 at the bottom of the inner base plate 15, and the top opening of the central hole of the through pipe 14 is blocked by the conical protruding structure at the bottom end of the small valve core 13;

finally, starting the equipment or the pipeline connected with the device, wherein the equipment or the pipeline normally works, pressure enters an inverted T-shaped channel on the right side of the small valve core 13 in the figure 2 through a valve front channel 2, a pressure taking port 3 and a connecting conduit 4, and enters a space below an inner base plate 15 and a side ring piece 16 in a first air chamber 8 through the inverted T-shaped channel and a hole at the bottom of a top working plate 6, when the pressure entering the space below the inner base plate 15 and the side ring piece 16 through the connecting conduit 4 and the inverted T-shaped channel is larger than the elastic force of a working spring 11, the air pressure below the inner base plate 15 and the side ring piece 16 jacks the inner base plate 15 upwards to deform the side ring piece 16, the working spring 11 is extruded and shortened, the inner base plate 15 drives the small valve core 13 to move upwards, a conical protruding structure at the bottom end of the small valve core 13 does not block a top opening of a central hole of a through pipe 14 any more, a hole for the small valve core 13 to slide is formed, The through pipe 14 is communicated with the second air chamber 18, the air in the second air chamber 18 passes through a pipeline discharging device arranged on the left side of the small control valve 5 in the graph 2, the pipeline arranged on the left side of the small control valve 5 is communicated with the top of the through pipe 14, the air pressure in the second air chamber 18 is reduced, the air pressure in the second air chamber 18 is not enough to be balanced with the front pressure in the front valve channel 2 in the graph 1, the horizontal plate 19 cannot be stably pressed on the bottom surface of the inner side of the bottom working disc 17, the main valve flap 20 cannot seal the top opening of the front valve channel 2, the horizontal plate 19 and the main valve flap 20 are jacked upwards by the pressure in the front valve channel 2, the front valve channel 2 is communicated with the horizontal channel arranged in the pressure relief valve body 1 in the graph 1, and the pressure in equipment or a pipeline is discharged through the opening on the right side of;

after the pressure is relieved for a period of time, the pressure in the equipment or the pipeline is reduced, the pressure transmitted to the space below the inner base plate 15 and the side ring plate 16 through the connecting conduit 4 is reduced, the pressure is not enough to push the inner base plate 15 to move upwards to press the working spring 11 and deform the side ring plate 16, the working spring 11 extends, the inner base plate 15 and the side ring plate 16 move downwards under the action of the working spring 11 to recover, the inner base plate 15 slides downwards with the small valve core 13 to seal the top opening of the through pipe 14 and prevent the pressure in the second air chamber 18 from being discharged, the pressure in the second air chamber 18 is constant, the pressure in the front valve channel 2 is reduced, so the pressure in the front valve channel 2 is not enough to jack the valve 20, the horizontal plate 19 and the main valve flap 20 are pressed by the pressure in the second air chamber 18 to recover the state shown in figure 1, the top of the front valve channel 2 is sealed, single pressure relief is completed, and the front valve pressure in the front valve channel 2, i.e. the pressure in the equipment and the pipes meets the working condition requirements.

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 guide's formula pressure relief valve, includes relief valve body (1), preceding passageway of valve (2), pressure taking port (3), governing valve screw rod (9), siphunculus (14) and main valve lamella (20), its characterized in that: the bottom of the pressure relief valve body (1) is provided with a valve front channel (2), the side of the valve front channel (2) is provided with a pressure taking port (3), the pressure taking port (3) is fixed to the bottom of a connecting pipe (4), the top end of the connecting pipe (4) is fixed to a small control valve (5), the small control valve (5) is fixed to the bottom of a top working disc (6), a through pipe (14) is fixed to the bottom of the small control valve (5), the bottom end of the through pipe (14) is fixed to a bottom working disc (17), the bottom working disc (17) is installed at the top of the pressure relief valve body (1), a control cap (7) is installed at the top of the top working disc (6), a first air chamber (8) is arranged in the top working disc (6), an adjusting valve screw (9) is arranged in the control cap (7), and the bottom end of the adjusting valve screw (9) is attached, the bottom slider (10) is arranged in the control cap (7), a working spring (11) is fixed to the bottom end of the bottom slider (10), the bottom end of the working spring (11) is fixed to the inner bolt (12), a small valve core (13) is fixed to the bottom end of the inner bolt (12), the small valve core (13) is attached to the top of the through pipe (14), the inner bolt (12) penetrates through the inner base plate (15), the inner side of the inner base plate (15) is attached to the side ring piece (16), the side ring piece (16) is connected with the top working disc (6), a second air chamber (18) is arranged in the bottom working disc (17), the inner bottom surface of the bottom working disc (17) is attached to the lower end face of the horizontal plate (19), a main valve flap (20) is fixed to the bottom end of the horizontal plate (19), and the bottom end of the main valve flap (20) is attached to the top of the front valve channel (2).

2. The pilot operated pressure relief valve according to claim 1, wherein: the top working disc (6) is formed by fixing a shell which is symmetrically distributed up and down through bolts, the edge of the shell which is symmetrically distributed up and down of the top working disc (6) is tightly attached to the outer edge of a side ring piece (16) which is symmetrically distributed about the center of the top working disc (6), the inner edge of the side ring piece (16) made of spring steel is tightly fixed by an inner substrate (15) which is symmetrically distributed about the side ring piece (16), and an arc-shaped protruding structure is arranged on the portion, located between the inner wall of the top working disc (6) and the edge of the inner substrate (15), of the side ring piece (16).

3. The pilot operated pressure relief valve according to claim 1, wherein: the control cap (7) is composed of a sealing cap (701) and a fixed base (702), the sealing cap (701) is installed at the top of the fixed base (702), the fixed base (702) is fixed at the top of the top working plate (6) through a bolt, and the sealing cap (701) and the fixed base (702) are connected in a clamping mode.

4. A pilot operated pressure relief valve according to claim 3, characterized in that: the adjusting valve screw rod (9) is in threaded connection with the fixed base (702), the bottom end of the adjusting valve screw rod (9) is attached to a groove in the top of the bottom sliding block (10), and the bottom sliding block (10) is in sliding connection with the fixed base (702).

5. The pilot operated pressure relief valve according to claim 1, wherein: the small valve core (13) is fixed with the inner base plate (15) through the inner bolt (12), the small valve core (13) penetrates through the bottom of the top working plate (6) and the top of the small control valve (5), holes formed in the tops of the small valve core (13) and the small control valve (5) are in sliding connection, and meanwhile, the conical protruding structure at the bottom of the small valve core (13) is attached to the central hole of the through pipe (14).

6. The pilot operated pressure relief valve according to claim 1, wherein: a channel with an inverted T-shaped section is formed in the bottom of the small valve core (13) and the small control valve (5) in the middle of the top of the connecting conduit (4), the top opening of the T-shaped channel is communicated with a hole in the bottom of the top working disc (6) through which the small valve core (13) penetrates, the diameter of the hole in the bottom of the top working disc (6) is larger than that of the small valve core (13), and meanwhile the small control valve (5) is connected with the top working disc (6) in a welding mode.

7. The pilot operated pressure relief valve according to claim 1, wherein: the horizontal plate (19) is connected with the main valve flap (20) in a welding mode, the outer side of the top of the main valve flap (20) is tightly attached to the inner wall of a hole formed in the top of the pressure relief valve body (1), the main valve flap (20) is connected with the top of the pressure relief valve body (1) in a sliding mode, and meanwhile the main valve flap (20) is in an inverted T-shaped front view section shape.

8. The pilot operated pressure relief valve according to claim 1, wherein: the bottom end of the main valve flap (20) is provided with 2 disc-shaped structures with diameters larger than the top opening of the front valve channel (2) and equal to the top opening of the front valve channel (2) from top to bottom, and the center of the main valve flap (20) and the center of the front valve channel (2) are positioned on the same vertical plane.