CN216242627U - Flange cast steel butterfly valve - Google Patents

Abstract

The utility model discloses a flange cast steel butterfly valve which comprises a valve body and an impact absorption assembly, wherein two ends of the valve body are connected with extension pipes, the impact absorption assembly comprises a C-shaped pipe, two ends of the C-shaped pipe are respectively and fixedly connected to one side of the two extension pipes, a round hole is formed in the center of the top end of the C-shaped pipe, a pressure relief assembly is fixedly arranged in the round hole, the pressure relief assembly comprises a pressure bearing shell and a connecting pipe which is centrally constructed at the bottom end of the pressure bearing shell and fixedly arranged in the round hole, through holes are formed in the bottoms of two sides of the pressure bearing shell, and air relief structures are fixedly arranged in the two through holes. This flange cast steel butterfly valve possesses and strikes buffer function, can avoid the condition that the butterfly plate warp to appear, has ensured the sealing performance of butterfly valve, leads to it can effectually cut off and the throttle, has improved the life of butterfly valve by a wide margin, still can be with air escape in the pipeline to reduce the frequency of rivers impact by a wide margin, the practicality is stronger.

Description

Flange cast steel butterfly valve

Technical Field

The utility model belongs to the technical field of butterfly valves, and particularly relates to a flange cast steel butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve, the closing member of which is a disc and rotates around a valve shaft to open and close, and the butterfly valve mainly plays the roles of cutting off and throttling on a pipeline.

The present (especially disclose in the chinese utility model patent of publication number CN 112524266A) a flange butterfly valve, it realizes spiral connection through the spiral head, is convenient for operate the valve rod, through the action of spiral head restriction valve rod, makes the valve rod can only rotate, and can not carry out the upper and lower action, and the cooperation sealing ring seals the top of valve rod and valve body, and is sealed reliable, avoids leaking, realizes the sealed to the valve body.

But flange cast steel butterfly valve among the prior art, its sealing performance who has optimized the butterfly valve, but because the effect of mainly playing cutting off and throttle in butterfly valve and the pipeline, when cutting off and reposition of redundant personnel rivers, often need open and close the butterfly valve, when opening and closing the butterfly valve, very easily produce the water hammer, the impact butterfly plate that the rivers that receive the water hammer effect influence are long-term relapseing, very easily lead to the butterfly plate to warp, and then seriously influence the sealing performance of butterfly valve, lead to its unable effectual cutting off and the throttle, the life of butterfly valve has been reduced by a wide margin.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a flange cast steel butterfly valve, which solves the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme:

a flange cast steel butterfly valve comprises a valve body and an impact absorption assembly, wherein two ends of the valve body are connected with extension pipes;

the impact absorption assembly comprises a C-shaped pipe, two ends of the C-shaped pipe are respectively and fixedly connected to one side of the two extension pipes, a round hole is formed in the center of the top end of the C-shaped pipe, and a pressure relief assembly is fixedly mounted in the round hole;

pressure release subassembly constructs in pressure-bearing shell bottom and fixed mounting in the connecting pipe in the round hole including bearing the pressure shell and placed in the middle, the through-hole has all been seted up to the bottom of pressure-bearing shell both sides, and equal fixed mounting has the structure of disappointing in two through-holes, the logical groove that supplies the transmission shaft activity to set up is seted up at the center of bearing the pressure shell bottom, and the bottom fixed mounting of transmission shaft has the piston head, the top butt of piston head has connect the cover to locate the epaxial spring of transmission.

Further, the run-flat structure is including being fixed in the support at pressure-bearing shell one side top, the chamber groove that supplies exhaust shell fixed mounting is seted up to the one side of keeping away from the pressure-bearing shell in the support.

Furthermore, the bottom end of the exhaust shell is fixedly connected with a gas pipe communicated with the pressure-bearing shell, and the top end of the exhaust shell is provided with an exhaust hole in the middle.

Furthermore, a floating ball used for blocking the exhaust hole is movably arranged in the exhaust shell, and the diameter of the floating ball is slightly smaller than the inner diameter of the exhaust shell.

Further, one end of the transmission shaft, which is far away from the piston head, is provided with a limiting plate, and the position of the piston head after being released is positioned below the two through holes.

Furthermore, a flange plate is constructed on one side of the outer edge surface of the extension pipe, which is far away from the valve body, and a plurality of mounting holes are formed in the flange plate in an annular array.

Compared with the prior art, the utility model has the following beneficial effects:

thanks to the arrangement of the impact absorption assembly, when the valve is closed, a water hammer effect is generated, at the moment, the valve body is impacted by water flows from the two extension pipes, the impact acts on the valve body instantly, the pressure is released into the pressure release assembly by the C-shaped pipe, the impact on the valve body is greatly reduced, the water flows entering the pressure bearing shell impact the piston head and extrude the spring, the impact is absorbed by pressing the spring, the deformation of the butterfly plate is effectively avoided, the sealing performance of the butterfly valve is ensured, the butterfly valve can be effectively cut off and throttled, and the service life of the butterfly valve is greatly prolonged;

benefit from pressure release assembly's setting, the transmission shaft through installing piston head and spring in the pressure-bearing shell carries out the pressure release to rivers, when rivers promote the piston head and remove to two through-holes tops, produce in the air of one of the necessary factor of water hammer flows into two disappointing structures respectively by two through-holes, accomplish the discharge of air, for preventing rivers discharge, rivers can promote the floater and shift up, and then block up the exhaust hole on the exhaust shell through the floater, effectively prevent rivers discharge, can reduce the frequency of rivers impact by a wide margin, and the practicality is stronger.

Drawings

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

FIG. 2 is a schematic view of the structure of an impact absorbing group of the present invention;

fig. 3 is a schematic view of the internal structure of the pressure relief assembly of the present invention.

In the figure: 1. a valve body; 2. an extension pipe; 201. a flange plate; 3. an impact absorbing assembly; 301. a C-shaped pipe; 4. a pressure relief assembly; 401. a pressure-bearing shell; 402. a connecting pipe; 403. a drive shaft; 404. a piston head; 405. a spring; 406. a support; 407. an exhaust shell; 408. a gas delivery pipe; 409. a floating ball.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1-3, a flange cast steel butterfly valve comprises a valve body 1 with two ends connected with an extension pipe 2 and an impact absorption assembly 3, wherein a flange 201 is formed on one side of the outer edge surface of the extension pipe 2 far away from the valve body 1, and the flange 201 is provided with a plurality of mounting holes in an annular array, the impact absorption assembly 3 comprises a C-shaped pipe 301, two ends of the C-shaped pipe 301 are respectively and fixedly connected with one side of the two extension pipes 2, the top end of the C-shaped pipe 301 is centrally provided with a round hole, and a pressure relief assembly 4 is fixedly mounted in the round hole, when the valve is closed, the valve body 1 will bear the water flow impact caused by the water hammer effect, the impact is determined by the air allowance in the pipeline, when the valve body 1 is impacted by water flow from the two extension pipes 2, the water flow enters the valve body 1 at the moment, and is released into the pressure release component 4 through the C-shaped pipe 301, so that the impact on the valve body 1 is greatly reduced.

Wherein, pressure release subassembly 4 constructs in pressure-bearing shell 401 bottom and fixed mounting connecting pipe 402 in the round hole including pressure-bearing shell 401 and placed in the middle, the through-hole has all been seted up to the bottom of pressure-bearing shell 401 both sides, and equal fixed mounting has the structure of losing heart in two through-holes, the logical groove that supplies transmission shaft 403 activity to set up is seted up at the center of pressure-bearing shell 401 bottom, and the bottom fixed mounting of transmission shaft 403 has piston head 404, the top butt of piston head 404 has connect the cover and locates the spring 405 on the transmission shaft 403, get into the rivers in the pressure-bearing shell 401, strike piston head 404, and extrude spring 405, absorb the impact through making spring 405 pressurized, the condition that the butterfly plate warp has effectively been avoided appearing, the sealing performance of butterfly valve has been ensured, lead to its can effectually cut off and throttle, the life of butterfly valve has been improved by a wide margin.

A limiting plate is formed at one end, far away from the piston head 404, of the transmission shaft 403, the position, after the piston head 404 is released, of the transmission shaft is located below the two through holes, the position of the piston head 404 is adjusted by water flow impact on the piston head 404, whether air leakage is needed or not can be determined, when the piston head 404 is located above the two through holes, air leakage is achieved, and air leakage is not achieved.

The air release structure comprises a support 406 fixed at the top of one side of the pressure bearing shell 401, a cavity groove for fixedly installing an exhaust shell 407 is formed in one side, far away from the pressure bearing shell 401, of the support 406, the bottom end of the exhaust shell 407 is fixedly connected with an air pipe 408 communicated with the pressure bearing shell 401, an exhaust hole is formed in the center of the top end of the exhaust shell 407, water flow is decompressed through a transmission shaft 403, installed with a piston head 404 and a spring 405, in the pressure bearing shell 401, when the water flow pushes the piston head 404 to move to the positions above the two through holes, air which is one of necessary factors for generating water hammer flows into the two air release structures through the two through holes respectively, and the air is exhausted;

wherein, for preventing rivers and discharging, the activity is provided with the floater 409 that is used for blockking up the exhaust hole in the shell 407 of exhausting, and the diameter of floater 409 slightly is less than the internal diameter of shell 407 of exhausting, and the floater 409 shifts up will be promoted by the rivers that gas-supply pipe 408 flowed in shell 407 of exhausting, and then blocks up the exhaust hole on the shell 407 of exhausting through floater 409, effectively prevents rivers and discharges, can reduce the frequency of rivers impact by a wide margin, and the practicality is stronger.

The working principle is as follows: when the flanged steel butterfly valve is used, the valve is fixed in a pipeline by matching two flange plates 201 arranged at two ends of two extension pipes 2 with bolts prepared in advance so as to cut off and throttle water flow in the pipeline, when the valve is closed in the process of reuse, water hammer effect is generated in the pipeline and is influenced by the water hammer effect, the water flow in the pipeline can impact a butterfly plate in a valve body 1, when the impact enters the valve body 1, the C-shaped pipe 301 releases the pressure in a pressure release assembly 4, a transmission shaft 403 provided with a piston head 404 bears the impact of the water flow and absorbs the impact through a spring 405, the impact is absorbed by pressing the spring 405, the deformation of the butterfly plate is effectively avoided, when the piston head 404 moves upwards to be above two through holes, two exhaust shells 407 are communicated with a pressure bearing shell 401, air in the pressure bearing shell 401 is exhausted from exhaust holes 407 on the two exhaust shells, along with the discharge of air, will reduce the frequency that rivers repeatedly strikeed in the pipeline by a wide margin, convenient to use, the practicality is stronger.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. A flange cast steel butterfly valve comprises a valve body (1) and an impact absorption assembly (3), wherein two ends of the valve body are connected with extension pipes (2);

the method is characterized in that: the shock absorption assembly (3) comprises a C-shaped pipe (301), two ends of the C-shaped pipe (301) are fixedly connected to one side of the two extension pipes (2) respectively, a round hole is formed in the center of the top end of the C-shaped pipe (301), and a pressure release assembly (4) is fixedly mounted in the round hole;

pressure release subassembly (4) construct in pressure-bearing shell (401) bottom and fixed mounting connecting pipe (402) in the round hole including bearing shell (401) and placed in the middle, the through-hole has all been seted up to the bottom of bearing shell (401) both sides, and equal fixed mounting has the structure of losing heart in two through-holes, the logical groove that supplies transmission shaft (403) activity to set up is seted up at the center of bearing shell (401) bottom, and the bottom fixed mounting of transmission shaft (403) has piston head (404), the top butt joint of piston head (404) has spring (405) of cover on locating transmission shaft (403).

2. A flange cast steel butterfly valve according to claim 1, characterised in that: the air release structure comprises a support (406) fixed to the top of one side of the pressure bearing shell (401), and a cavity groove for fixedly mounting the exhaust shell (407) is formed in one side, far away from the pressure bearing shell (401), of the support (406).

3. A flange cast steel butterfly valve according to claim 2, wherein: the bottom end of the exhaust shell (407) is fixedly connected with an air conveying pipe (408) communicated with the pressure-bearing shell (401), and the top end of the exhaust shell (407) is provided with an exhaust hole in the middle.

4. A flange cast steel butterfly valve according to claim 3, wherein: a floating ball (409) used for blocking the exhaust hole is movably arranged in the exhaust shell (407), and the diameter of the floating ball (409) is slightly smaller than the inner diameter of the exhaust shell (407).

5. A flange cast steel butterfly valve according to claim 1, characterised in that: the end of the transmission shaft (403) far away from the piston head (404) is provided with a limiting plate, and the position of the piston head (404) after being released is positioned below the two through holes.

6. A flange cast steel butterfly valve according to claim 1, characterised in that: one side of keeping away from valve body (1) on the outer fringe face of extension pipe (2) is constructed and is had ring flange (201), and is the annular array on ring flange (201) and has seted up a plurality of mounting holes.

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