CN217381664U

CN217381664U - Sealed butterfly valve for hydropower station

Info

Publication number: CN217381664U
Application number: CN202221251921.1U
Authority: CN
Inventors: 沈顺云; 黄万虎; 刘开泰; 梁文华; 俞照杰; 王婷婷
Original assignee: Huaneng Zhouqu Hydropower Development Co ltd
Current assignee: Huaneng Zhouqu Hydropower Development Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-09-06
Anticipated expiration: 2032-05-24

Abstract

The utility model discloses a sealing butterfly valve for a hydropower station, belonging to the technical field of pipeline valves; it includes: including valve plate, valve body and valve rod, be equipped with expandable expansion ring on the excircle of valve plate, the middle part of valve plate is equipped with the reservoir that is used for holding hydraulic oil, the reservoir pass through the pipeline with the expansion ring intercommunication, the reservoir can order about the expansion ring inflation is in order to supply the reinforcing the expansion ring with sealing between the valve body. The utility model discloses can be according to the inflation degree of water pressure automatically regulated expansion ring.

Description

Sealed butterfly valve for hydropower station

Technical Field

The utility model relates to a valve technical field for the hydroelectric engineering especially relates to a power station is with sealed butterfly valve.

Background

The valve is a control part in various fluid conveying systems, has the functions of diversion, stopping, regulation, throttling, backflow prevention, diversion or overflow pressure relief and the like, and is widely applied to the industrial fields of petroleum, chemical engineering, metallurgy, electric power, mines and the like. The butterfly valve is a valve which uses a circular butterfly plate as an opening and closing piece and rotates along with a valve rod to open, close and adjust a fluid passage.

The invention with the publication number of CN211039718U discloses a sealed water inlet butterfly valve for a power station unit, which comprises a water butterfly valve body, a valve rod and a valve plate, wherein the valve rod is axially arranged on the inner side of the water butterfly valve body, a transmission head is fixedly arranged at one end of the valve rod, a wrench is clamped on the surface of the transmission head, an inner inflation rod is arranged inside the valve rod, a rotating wheel is fixedly arranged at one end of the inner inflation rod, a valve body is fixedly arranged at the lower end of the water butterfly valve body, the valve plate is arranged inside the valve body, fixed compression rings are fixedly arranged on the surfaces of the two sides of the valve plate, a plurality of fixing nails are arranged inside the fixed compression rings, a plurality of vent grooves are arranged inside the valve plate, a rubber ring is arranged at one end of each vent groove, and a plurality of fixing bolts are arranged on the surface of the water butterfly valve body.

The internal pressure of the rubber ring of the existing butterfly valve needs to be adjusted manually, when the pressure in the water body is increased, the pressure in the rubber ring cannot be adjusted in time, and the rubber ring is easy to leak.

SUMMERY OF THE UTILITY MODEL

In view of this, a need exists to provide a sealing butterfly valve for a hydropower station, so as to solve the problem that the rubber ring of the existing butterfly valve cannot automatically adjust the pressure.

The utility model provides a power station is with sealed butterfly valve, including valve plate, valve body and valve rod, be equipped with expandable expansion ring on the excircle of valve plate, the middle part of valve plate is equipped with the reservoir that is used for holding hydraulic oil, the reservoir pass through the pipeline with the expansion ring intercommunication, the reservoir can order about the expansion ring inflation, in order to supply the reinforcing the expansion ring with sealed between the valve body.

Further, an embedded annular groove body is arranged on the outer circular surface of the valve plate, the telescopic ring is arranged in the annular groove body in a surrounding mode, and the inner ring of the telescopic ring is bonded with the outer circular groove wall of the annular groove body.

Furthermore, the diameter of the largest outer ring of the telescopic ring is larger than the diameter of the outer circle of the valve plate.

Further, the liquid storage bag comprises a rigid sleeve and a bag body, the rigid sleeve is sleeved outside the bag body and fixedly connected with the bag body, and the bag body is communicated with the outside through an opening of the rigid sleeve.

Furthermore, the middle part of the valve plate is provided with a mounting hole, and the outer wall of the rigid sleeve is fixedly connected with the mounting hole.

Furthermore, a communicating hole is formed in the valve plate, two ends of the communicating hole are communicated with the mounting hole and the inner cavity of the annular groove body respectively, and a pipeline used for communicating the bag body and the telescopic ring is arranged in the communicating hole.

Further, the intercommunicating pore is two at least and encircles the axis equidistance of valve plate sets up, every all be equipped with in the intercommunicating pore and be used for the intercommunication the utricule with the pipeline of expansion ring.

Furthermore, the inside of expansion ring is equipped with the compression chamber that is used for holding hydraulic oil, the compression chamber pass through the pipeline with the inner chamber intercommunication of utricule.

Further, the telescopic ring is a rubber telescopic ring.

Further, the valve rod is fixedly connected with the valve plate through the valve body.

Compared with the prior art, the utility model discloses the beneficial effect who has does:

(1) the utility model discloses a power station is with sealed butterfly valve is equipped with expandable expansion ring on the excircle of valve plate, and the middle part of valve plate is equipped with the reservoir that is used for holding hydraulic oil, and the reservoir passes through pipeline and expansion ring intercommunication. The telescopic ring is filled in the gap between the valve plate and the valve body. The liquid storage bag directly bears the pressure from the water body, the hydraulic oil in the liquid storage bag is extruded into the telescopic ring, the telescopic ring expands, and the sealing between the telescopic ring and the valve body is enhanced. The sealing performance between the valve plate and the valve body can be increased along with the increase of the pressure of the external water body, the sealing performance is adjusted in real time, and the possible leakage condition is prevented.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a schematic structural view of a valve plate and a valve rod in the present invention;

FIG. 3 is a schematic cross-sectional view of a valve plate according to the present invention;

FIG. 4 is a schematic view of a reservoir according to the present invention;

in the figure, a valve plate 100, an annular groove body 110, a mounting hole 120, a communication hole 130, a valve body 200, a valve rod 300, a telescopic ring 400, a compression cavity 410, a liquid storage bag 500, a rigid sleeve 510 and a bag body 520.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Referring to fig. 1 to 4, the sealing butterfly valve for a hydropower station in the embodiment includes a valve plate 100, a valve body 200, and a valve rod 300, wherein an expandable expansion ring 400 is disposed on an outer circumference of the valve plate 100, a liquid storage bag 500 for containing hydraulic oil is disposed in a middle portion of the valve plate 100, and the liquid storage bag 500 is communicated with the expansion ring 400 through a pipeline. When the valve plate 100 is rotated by the valve rod 300 such that the valve plate 100 is parallel to the cross-section of the valve body 200, the bellows 400 is filled in the gap between the valve plate 100 and the valve body 200. The reservoir 500 directly receives the pressure from the water, the hydraulic oil in the reservoir 500 is squeezed into the telescopic ring 400, the telescopic ring 400 expands, and the seal between the telescopic ring 400 and the valve body 200 is enhanced. Meanwhile, the sealing performance between the valve plate 100 and the valve body 200 can be increased along with the increase of the external water body pressure, so that the sealing performance can be adjusted in real time, and the possible leakage condition can be prevented.

Referring to fig. 2 and 3, an embedded annular groove 110 is disposed on an outer circumferential surface of the valve plate 100, the expansion ring 400 is enclosed in the annular groove 110, two sides of the annular groove 110 can limit the expansion ring 400, so as to prevent the expansion ring 400 from moving laterally and falling off, and the expansion ring 400 can only expand and contract along a radial direction of the valve plate 100 to fill a gap between the valve plate 100 and the valve body 200. As a further embodiment, the maximum outer diameter of the telescopic ring 400 is larger than the outer diameter of the valve plate 100, and when the telescopic ring 400 expands to the maximum outer diameter, the telescopic ring 400 is separated from the annular groove body 110, and the telescopic ring 400 can fill and seal the gap between the valve plate 100 and the valve body 200.

Referring to fig. 4, the reservoir 500 includes a rigid sleeve 510 and a bladder 520, the rigid sleeve 510 is sleeved outside the bladder 520 and is fixedly connected to the bladder 520, and the bladder 520 is communicated with the outside through an opening of the rigid sleeve 510. The construction of the reservoir 500 allows the bladder 520 to purposely carry pressure from both sides of the opening of the rigid sleeve 510, making the reservoir 500 more sensitive to external pressure.

Referring to fig. 3, the valve plate 100 has a mounting hole 120 formed in the middle thereof, and the rigid sleeve 510 has an outer wall fixedly connected to the mounting hole 120. The mounting hole 120 runs through whole valve plate 100 and sets up, and the both sides homoenergetic of valve plate 100 is responded to water pressure, and the both sides homoenergetic of valve plate 100 is responded to the pressure of water, has increased valve plate 100's practicality.

Referring to fig. 3, the valve plate 100 is provided with a communication hole 130, two ends of the communication hole 130 are respectively communicated with the mounting hole 120 and the inner cavity of the annular groove body 110, and the communication hole 130 is provided with a pipeline for communicating the bag body 520 and the expansion ring 400. The communication hole 130 is provided in the valve plate 100, and a pipe in the communication hole 130 can be protected from an interference of an external pressure. As a further embodiment, at least two communication holes 130 are provided at equal intervals around the central axis of the valve plate 100, and each communication hole 130 is provided with a conduit for communicating the bladder 520 with the telescopic ring 400. The single communication hole 130 and the single pipe are provided, which causes the different positions of the telescopic ring 400 to be asynchronous when the telescopic change is performed, and the hydraulic pressure at the position of the telescopic ring 400 with different distance from the pipe is different, thereby reducing the sealing performance of the telescopic ring 400.

Referring to fig. 2, a compression chamber 410 for containing hydraulic oil is disposed inside the telescopic ring 400, the compression chamber 410 is communicated with an inner cavity of the capsule 520 through a pipeline, the telescopic ring 400 is a rubber telescopic ring 400, the telescopic performance of the rubber telescopic ring 400 is better, hydraulic oil in the compression chamber 410 is increased, the telescopic ring 400 expands, hydraulic oil in the compression chamber 410 is reduced, and the telescopic ring 400 contracts.

Referring to fig. 1, the valve rod 300 is fixedly connected to the valve plate 100 through the valve body 200, and the valve rod 300 is rotated manually from the outside to drive the valve plate 100 to rotate relative to the valve body 200, so as to control the opening and closing of the valve body 200.

The working process is as follows: when the valve plate 100 is parallel to the cross section of the valve body 200, the liquid storage bag 500 on the valve plate 100 is subjected to the pressure of the external water body, the hydraulic oil in the liquid storage bag 500 is conveyed to the telescopic ring 400, the telescopic ring 400 expands to fill the gap between the valve body 200 and the valve plate 100, and the sealing between the telescopic ring 400 and the valve body 200 is enhanced.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. The utility model provides a power station is with sealed butterfly valve, includes valve plate, valve body and valve rod, its characterized in that, be equipped with expandable expansion ring on the excircle of valve plate, the middle part of valve plate is equipped with the reservoir that is used for holding hydraulic oil, the reservoir pass through the pipeline with the expansion ring intercommunication, the reservoir can order about the expansion ring inflation, in order to supply the reinforcing the expansion ring with sealed between the valve body.

2. The sealing butterfly valve for the hydropower station according to claim 1, wherein an embedded annular groove body is arranged on an outer circumferential surface of the valve plate, the expansion ring is arranged in the annular groove body in a surrounding manner, and an inner ring of the expansion ring is bonded with an outer circumferential groove wall of the annular groove body.

3. The sealing butterfly valve for the hydropower station as claimed in claim 2, wherein the maximum outer ring diameter of the telescopic ring is larger than the outer ring diameter of the valve plate.

4. The sealing butterfly valve for the hydropower station according to claim 3, wherein the liquid storage bag comprises a rigid sleeve and a bag body, the rigid sleeve is sleeved outside the bag body and fixedly connected with the bag body, and the bag body is communicated with the outside through an opening of the rigid sleeve.

5. The sealing butterfly valve for the hydropower station as claimed in claim 4, wherein a mounting hole is formed in the middle of the valve plate, and the outer wall of the rigid sleeve is fixedly connected with the mounting hole.

6. The sealing butterfly valve for the hydropower station as claimed in claim 5, wherein a communication hole is formed in the valve plate, two ends of the communication hole are respectively communicated with the mounting hole and the inner cavity of the annular groove body, and a pipeline for communicating the bag body and the expansion ring is arranged in the communication hole.

7. The sealing butterfly valve for the hydropower station according to claim 6, wherein the number of the communication holes is at least two, the communication holes are arranged around the central axis of the valve plate at equal intervals, and a pipeline for communicating the bag body and the telescopic ring is arranged in each communication hole.

8. The sealing butterfly valve for the hydropower station according to claim 7, wherein a compression cavity for containing hydraulic oil is arranged inside the telescopic ring, and the compression cavity is communicated with an inner cavity of the bag body through a pipeline.

9. The sealing butterfly valve for the hydropower station according to claim 8, wherein the telescopic ring is a rubber telescopic ring.

10. A sealed butterfly valve for a hydropower station according to any one of claims 1-9, wherein the valve rod is fixedly connected with the valve plate via the valve body.