CN215980859U

CN215980859U - Low-flow limiting shutoff valve with overflow sealing function

Info

Publication number: CN215980859U
Application number: CN202122352164.9U
Authority: CN
Inventors: 陆超
Original assignee: Qidong Explosion Proof Electric Appliance Co ltd
Current assignee: Qidong Explosion Proof Electric Appliance Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-03-08
Anticipated expiration: 2031-09-27

Abstract

The utility model discloses a low-flow limit shutoff valve with an overflow sealing function, which comprises a valve body, wherein a baffle plate is fixed on the inner wall of the valve body, a first rotating shaft is arranged inside the valve body, a butterfly valve is fixed on the surface of the first rotating shaft, a sealing gasket is arranged between the butterfly valve and the valve body, a second rotating shaft is arranged inside the valve body, the end parts of the second rotating shaft and the first rotating shaft penetrate through the inside of the valve body, and the low-flow limit shutoff valve with the overflow sealing function increases the flow rate of liquid inside a pipeline and further increases the impact force on the water baffle plate through the mutual matching of the baffle plate, the first rotating shaft, the butterfly valve, the second rotating shaft, a fluted disc, a chain, a gear, a transverse plate, the water baffle plate, a limiting mechanism and other parts, so that the problem that when the existing equipment is powered off is solved, can not work normally, thereby causing the problem of potential safety hazard.

Description

Low-flow limiting shutoff valve with overflow sealing function

Technical Field

The utility model relates to the technical field of shut-off valves, in particular to a low-flow limit shut-off valve with an overflow sealing function.

Background

The shutoff valve is an important component of a thermal power plant unit safety system, and when liquid leaks or flows backwards in a transport pipeline, the shutoff valve can close an upstream valve at the first time according to a field signal, so that stable operation of production equipment and safety of personnel are guaranteed.

However, most of the existing low-flow limiting shutoff valves with the overflow sealing function are controlled by circuit signals, and when the power failure occurs, the signals cannot be transmitted, so that the shutoff valves are disabled and cannot be normally used, and great potential safety hazards are caused. In order to solve the problems, innovative design is urgently needed on the basis of the original shut-off valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-flow limiting shutoff valve with an overflow sealing function, and aims to solve the problems that most of low-flow limiting shutoff valves with the overflow sealing function in the background art are controlled by circuit signals, and when a power failure condition occurs, the signals cannot be transmitted, so that the shutoff valve fails to work, cannot be normally used and causes great potential safety hazards.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a low restriction shutoff valve that flows with overflow sealing function, includes the valve body, the inner wall of valve body is fixed with the sideboard, the inside of valve body is provided with first pivot, the fixed surface of first pivot has the butterfly valve, be provided with sealed the pad between butterfly valve and the valve body, the inside of valve body is provided with the second pivot, the inside of valve body is all run through to the tip of second pivot and first pivot, the tip of second pivot and first pivot all is fixed with the fluted disc, the surface of fluted disc is provided with the chain, the fixed surface of second pivot has the gear, the side of gear is connected with the diaphragm, the end fixing of diaphragm has the breakwater, the inside of breakwater runs through and installs stop gear.

Preferably, the fluted disc is connected with the chain in a meshing manner, and the fluted disc is symmetrically distributed around the longitudinal center line of the chain.

Preferably, the surface of the transverse plate is provided with a tooth block, and the transverse plate is in meshed connection with the gear.

Preferably, the limiting mechanism comprises a sliding rod, a fixing block and a spring, the sliding rod is installed inside the water baffle in a penetrating mode, the end portion of the sliding rod is fixedly connected with the inner wall of the valve body, the fixing block is fixed to the surface of the sliding rod, the spring is arranged on the surface of the sliding rod, one end of the spring is fixedly connected with the fixing block, and the other end of the spring is fixedly connected with the water baffle.

Preferably, the water baffle and the sliding rod form a sliding structure, and the sliding rod is of an L-shaped structure.

Preferably, the spring and the sliding rod form a nested structure, and the spring and the sliding rod are symmetrically distributed about the transverse center line of the water baffle.

Compared with the prior art, the utility model has the beneficial effects that: this low restriction shutoff valve that flows with overflow sealing function, through the sideboard, first pivot, the butterfly valve, the second pivot, the fluted disc, the chain, the gear, the diaphragm, parts such as breakwater and stop gear mutually support, when making pipeline liquid leak, the inside liquid velocity of flow of pipeline can increase, and then can strengthen the impact to the breakwater, it is rotatory to make the breakwater drive the butterfly valve, and then close the pipeline, when having solved current equipment outage, unable normal work, thereby cause the problem of potential safety hazard.

Drawings

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

FIG. 2 is a schematic side sectional view of a butterfly valve of the present invention;

FIG. 3 is a schematic view of the gear top mounting structure of the present invention;

fig. 4 is a schematic structural view of the limiting mechanism of the present invention.

In the figure: 1. a valve body; 2. a sideboard; 3. a first rotating shaft; 4. a butterfly valve; 5. a second rotating shaft; 6. a fluted disc; 7. a chain; 8. a gear; 9. a transverse plate; 10. a water baffle; 11. a limiting mechanism; 1101. a slide bar; 1102. a fixed block; 1103. a spring.

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.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a low restriction shutoff valve that flows with overflow sealing function, including valve body 1, the inner wall of valve body 1 is fixed with sideboard 2, the inside of valve body 1 is provided with first pivot 3, the fixed surface of first pivot 3 has butterfly valve 4, be provided with sealed the pad between butterfly valve 4 and the valve body 1, the inside of valve body 1 is provided with second pivot 5, the inside of valve body 1 is all run through to the tip of second pivot 5 and first pivot 3, the tip of second pivot 5 and first pivot 3 all is fixed with fluted disc 6, the surface of fluted disc 6 is provided with chain 7, the fixed surface of second pivot 5 has gear 8, the side of gear 8 is connected with diaphragm 9, the end fixing of diaphragm 9 has breakwater 10, the inside of breakwater 10 is run through and is installed stop gear 11.

Fluted disc 6 is connected for the meshing with chain 7, and fluted disc 6 is about the vertical central line symmetric distribution of chain 7, through the meshing of fluted disc 6 and chain 7, can be the rotation of first pivot 3 with the rotation transmission of second pivot 5, and then drive the butterfly valve 4 rotation, accomplish the switching to the pipeline.

The surface of diaphragm 9 is provided with the tooth piece, and diaphragm 9 is connected for the meshing with gear 8, and the meshing structure makes diaphragm 9 can drive gear 8 rotatory when moving outward, then drives butterfly valve 4 operation through second pivot 5 and first pivot 3, avoids liquid to last the overflow.

Stop gear 11 includes slide bar 1101, fixed block 1102 and spring 1103, the inside through mounting of breakwater 10 has slide bar 1101, the tip of slide bar 1101 and the inner wall fixed connection of valve body 1, the fixed surface of slide bar 1101 is fixed with fixed block 1102, the surface of slide bar 1101 is provided with spring 1103, the one end and the fixed block 1102 fixed connection of spring 1103, the other end and the breakwater 10 fixed connection of spring 1103, above-mentioned mechanism can drive butterfly valve 4 when moving and rotate, thereby realize the switching to the pipeline, make equipment under the condition of outage, still can normal use, the safety of production has been guaranteed.

The water baffle 10 and the slide bar 1101 form a sliding structure, the slide bar 1101 is an L-shaped structure, the sliding structure enables the water baffle 10 to move correspondingly when the flow inside the pipeline is increased, so that subsequent parts are driven to operate, the pipeline is closed, potential safety hazards caused by liquid overflow are avoided, and meanwhile the slide bar 1101 is also used for supporting the limiting water baffle 10.

The spring 1103 and the sliding rod 1101 form a nested structure, the spring 1103 and the sliding rod 1101 are symmetrically distributed about the transverse center line of the water baffle 10, and when the liquid inside the pipeline returns to the normal flow speed, the water baffle 10 can return under the action of the spring 1103, so that the pipeline is opened, and normal use can be continued.

The working principle is as follows: when the low-flow limiting shutoff valve with the overflow sealing function is used, firstly, the valve body 1 is fixed at the upstream position of a conveying pipeline through parts such as bolts, when the downstream position of the pipeline is broken, liquid can flow out from the broken position, so that the flow rate of the liquid in the pipeline can be increased, when the flow rate of the liquid in the pipeline is increased, the impact force of the liquid on the water baffle 10 is increased, so that the water baffle 10 can be pushed to move rightwards, the spring 1103 can be compressed when the water baffle 10 moves rightwards, and the gear 8 can be driven to rotate through the transverse plate 9, because the gear 8 is fixedly connected with the second rotating shaft 5, the second rotating shaft 5 can be driven to synchronously rotate when the gear 8 rotates, and the second rotating shaft 5 is connected with the first rotating shaft 3 through the fluted disc 6 and the chain 7, so that the first rotating shaft 3 can be driven to rotate when the second rotating shaft 5 rotates, and the butterfly valve 4 can be driven to rotate, close the pipeline of this moment valve body 1 gradually, when diaphragm 9 and sideboard 2 contact, butterfly valve 4 can rotate the half-cycle, can thoroughly close the transfer passage of valve body 1, make liquid can't continue to circulate, then the staff can restore fracture department, after repairing the completion, but staff reverse rotation fluted disc 6, make butterfly valve 4 can open transfer passage once more, when the liquid velocity of flow is steady, loosen fluted disc 6, breakwater 10 also can be under the effect of spring 1103, the left side moves and resets, the pipeline can continue to use.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. A low flow restriction shut-off valve with overflow closure, comprising a valve body (1), characterized in that: a baffle plate (2) is fixed on the inner wall of the valve body (1), a first rotating shaft (3) is arranged in the valve body (1), a butterfly valve (4) is fixed on the surface of the first rotating shaft (3), a sealing gasket is arranged between the butterfly valve (4) and the valve body (1), a second rotating shaft (5) is arranged in the valve body (1), the end parts of the second rotating shaft (5) and the first rotating shaft (3) penetrate through the valve body (1), fluted discs (6) are fixed at the end parts of the second rotating shaft (5) and the first rotating shaft (3), a chain (7) is arranged on the surface of the fluted disc (6), a gear (8) is fixed on the surface of the second rotating shaft (5), a transverse plate (9) is connected to the side surface of the gear (8), a water baffle (10) is fixed at the end part of the transverse plate (9), and a limiting mechanism (11) penetrates through the inside of the water baffle (10).

2. A low flow restriction shutoff valve with spill containment as in claim 1 wherein: the fluted disc (6) is connected with the chain (7) in a meshing manner, and the fluted disc (6) is symmetrically distributed about the longitudinal central line of the chain (7).

3. A low flow restriction shutoff valve with spill containment as in claim 1 wherein: the surface of the transverse plate (9) is provided with a tooth block, and the transverse plate (9) is in meshed connection with the gear (8).

4. A low flow restriction shutoff valve with spill containment as in claim 1 wherein: the limiting mechanism (11) comprises a sliding rod (1101), a fixing block (1102) and a spring (1103), the sliding rod (1101) is installed inside the water baffle (10) in a penetrating mode, the end portion of the sliding rod (1101) is fixedly connected with the inner wall of the valve body (1), the fixing block (1102) is fixed to the surface of the sliding rod (1101), the spring (1103) is arranged on the surface of the sliding rod (1101), one end of the spring (1103) is fixedly connected with the fixing block (1102), and the other end of the spring (1103) is fixedly connected with the water baffle (10).

5. A low flow restriction shutoff valve with spill containment as in claim 4 wherein: the water baffle (10) and the sliding rod (1101) form a sliding structure, and the sliding rod (1101) is of an L-shaped structure.

6. A low flow restriction shutoff valve with spill containment as in claim 4 wherein: the spring (1103) and the sliding rod (1101) form a nested structure, and the spring (1103) and the sliding rod (1101) are symmetrically distributed about a transverse center line of the water baffle (10).