CN217381759U

CN217381759U - Check valve control structure of drainage system of hydroelectric power plant

Info

Publication number: CN217381759U
Application number: CN202123222749.5U
Authority: CN
Inventors: 杨世昌
Original assignee: Puxian Boyuan Power Installation Co ltd
Current assignee: Puxian Boyuan Power Installation Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-09-06
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a check valve control structure of a drainage system of a hydroelectric power plant, which comprises a spherical valve body and connecting pipes, wherein a valve cavity is arranged inside the spherical valve body, the connecting pipes are symmetrically arranged at two sides of the outer edge surface of the spherical valve body, a valve plate is rotatably arranged in the valve cavity, one end of the valve plate is fixedly provided with a waterproof sealing gasket which is in interference butt joint with the valve cavity and the inner wall of the connecting pipe, the bottom of the valve cavity is fixedly provided with an installation block, one side of the top of the installation block is fixedly provided with a waterproof sealing lug which is in butt joint with one side of the valve plate, the top of the outer edge surface of the spherical valve body is provided with a drain pipe, the upper end surface of the drain pipe is provided with a fixed flange, the upper end surface of the fixed flange is detachably provided with a valve cover, cavity grooves which are communicated with the valve cavity are arranged in the drain pipe, the fixed flange and the valve cover, the check valve control structure of the drainage system of the hydroelectric power plant is reasonable, and by arranging a double-sealing structure, effectively promoted the leakproofness, the practicality is strong.

Description

Check valve control structure of drainage system of hydroelectric power plant

Technical Field

The utility model belongs to the technical field of the check valve, concretely relates to hydroelectric power plant drainage system check valve control structure.

Background

The check valve is a valve whose opening and closing piece is a circular valve clack and can be operated by its self-weight and medium pressure to block back flow of medium. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. Swing check valves have a flap that is tilted and can pivot, and operate on a similar principle to lift check valves. The check valve is commonly used as a bottom valve of a water pumping device and can prevent the backflow of water. The check valve and the stop valve are combined for use, and the safety isolation effect can be achieved. The disadvantages are high resistance and poor sealing performance when closed.

At present, a check valve is generally required to be installed in a drainage system of a hydroelectric power plant, when the existing check valve is installed, a valve core of the existing check valve is generally automatically controlled to be opened and closed, the tightness of the valve core is poor, after the check valve is opened, water flow can flow out through a gap between the valve core and a valve body, and the tightness is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydroelectric power plant drainage system check valve control structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme does:

a check valve control structure of a drainage system of a hydroelectric power plant comprises a spherical valve body and connecting pipes, wherein a valve cavity is formed in the spherical valve body, and the connecting pipes are symmetrically formed on two sides of the outer edge surface of the spherical valve body;

the valve structure is characterized in that a valve plate is rotatably mounted in the valve cavity, a waterproof sealing gasket of the interference butt valve cavity and the inner wall of the connecting pipe is fixedly mounted at one end of the valve plate, a mounting block is fixedly mounted at the bottom of the valve cavity, and a waterproof sealing convex block on one side of the butt valve plate is fixedly arranged on one side of the top of the mounting block.

Furthermore, a drain pipe is constructed at the top of the outer edge surface of the spherical valve body, a fixed flange is constructed on the upper end surface of the drain pipe, a valve cover is detachably mounted on the upper end surface of the fixed flange, and cavity grooves communicated with the valve cavity are formed in the drain pipe, the fixed flange and the valve cover.

Furthermore, threaded holes are formed in the upper end surface of the fixing flange in an annular array, and fixing bolts capable of being screwed into the valve cover and the threaded holes are arranged in the upper end surface of the valve cover in the annular array.

Further, thread fit installs hexagon nut on fixing bolt's the outer fringe face, the up end fixed mounting placed in the middle of the valve gap has the boss, the top of boss is constructed centrally and is had the pull ring.

Furthermore, a filter screen is detachably mounted on the inner wall of the cavity groove, mounting plates which are abutted to the inner wall of the cavity groove are fixedly mounted on two sides of the upper end face and the lower end face of the filter screen, and limit bolts which can be screwed into the drainage pipe are arranged in the mounting plates.

Furthermore, a connecting flange is fixedly mounted at one end, far away from the spherical valve body, of the connecting pipe, and connecting holes are formed in the connecting flange in an annular array.

Compared with the prior art, the utility model discloses following beneficial effect has: benefit from the setting of installation piece and waterproof sealing lug, rivers accessible connecting pipe enters into the valve pocket of spherical valve body, and along with the flow of rivers, it is rotatory to promote the valve plate, make the valve plate change over into the chamber inslot, and then the unblocked of valve pocket and connecting pipe has been maintained, when rivers end suddenly and back, can produce the negative pressure in the valve pocket, and through the rivers drive valve plate upset that backs, make the valve plate change over into the valve pocket, and make the waterproof sealing pad of valve plate tip cross waterproof sealing lug, make the inner wall of waterproof sealing pad butt connecting pipe, and one side of waterproof sealing lug butt valve plate, can realize double sealing through waterproof sealing pad and waterproof sealing lug, the leakproofness of this check valve has effectively been promoted.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is an enlarged schematic view of a structure a in fig. 2 according to the present invention.

In the figure: 1. a spherical valve body; 2. a valve cavity; 3. a connecting pipe; 4. a connecting flange; 5. connecting holes; 6. a drain pipe; 7. fixing the flange; 8. a valve cover; 9. a cavity groove; 10. fixing the bolt; 11. a pull ring; 12. a valve plate; 13. a waterproof gasket; 14. a waterproof sealing bump; 15. a filter screen; 16. mounting a plate; 17. and a limiting bolt.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1 to 3, a check valve control structure of a drainage system of a hydroelectric power plant comprises a spherical valve body 1 provided with a valve cavity 2 therein and connecting pipes 3 symmetrically constructed at two sides of the outer edge surface of the spherical valve body 1;

a valve plate 12 is rotatably installed in the valve cavity 2, one end of the valve plate 12 is fixedly provided with a waterproof sealing gasket 13 which is in interference abutting joint with the valve cavity 2 and the inner wall of the connecting pipe 3, the bottom of the valve cavity 2 is fixedly provided with an installation block, one side of the top of the installation block is fixedly provided with a waterproof sealing lug 14 which is in abutting joint with one side of the valve plate 12, thanks to the arrangement of the installation block and the waterproof sealing lug 14, water flow can enter the valve cavity 2 of the spherical valve body 1 through the connecting pipe 3 and can push the valve plate 12 to rotate along with the flow of the water flow, so that the valve plate 12 is rotated into the cavity groove 9, the smoothness of the valve cavity 2 and the connecting pipe 3 is maintained, when the water flow is suddenly cut off and retreated, negative pressure is generated in the valve cavity 2, the valve plate 12 is driven to turn over through the retreated water flow, the valve plate 12 is rotated into the valve cavity 2, and the waterproof sealing gasket 13 at the end of the valve plate 12 slides over the waterproof sealing lug 14, so that the waterproof sealing gasket 13 abuts against the inner wall of the connecting pipe 3, and waterproof sealing lug 14 butt one side of valve plate 12, can realize double-seal through waterproof sealing pad 13 and waterproof sealing lug 14, effectively promoted the leakproofness of this check valve.

The water discharging pipe 6 is formed in the top of the outer edge face of the spherical valve body 1, the fixing flange 7 is formed in the upper end face of the water discharging pipe 6, the valve cover 8 is detachably mounted on the upper end face of the fixing flange 7, and cavity grooves 9 communicated with the valve cavity 2 are formed in the water discharging pipe 6, the fixing flange 7 and the valve cover 8.

Wherein, the upper end surface of the fixed flange 7 is provided with threaded holes in an annular array, and the upper end surface of the valve cover 8 is provided with fixed bolts 10 which can be screwed into the valve cover 8 and the threaded holes in an annular array.

The outer edge face of the fixing bolt 10 is provided with a hexagon nut in a threaded fit mode, the upper end face of the valve cover 8 is fixedly provided with a boss in the middle, and the top of the boss is provided with a pull ring 11 in the middle.

Wherein, demountable installation has filter screen 15 on the inner wall of chamber groove 9, and the equal fixed mounting in upper and lower terminal surface both sides of filter screen 15 has the mounting panel 16 of butt chamber groove 9 inner wall, is provided with the spacing bolt 17 that can screw in the drain pipe 6 in the mounting panel 16.

Wherein, a connecting flange 4 is fixedly arranged at one end of the connecting pipe 3 far away from the spherical valve body 1, and connecting holes 5 are arranged in the connecting flange 4 in an annular array.

The working principle is as follows: when the check valve control structure of the drainage system of the hydroelectric power plant is used, a pipeline can be connected through the connecting flange 4 and the connecting hole 5, the pipeline is communicated with the connecting pipe 3 and the spherical valve body 1, after water flows are introduced into the pipeline, the water flows can enter the valve cavity 2 of the spherical valve body 1 through the connecting pipe 3 and can push the valve plate 12 to rotate along with the flowing of the water flows, the valve plate 12 is rotated into the cavity groove 9, the smoothness of the valve cavity 2 and the connecting pipe 3 is further maintained, when the water flows are suddenly stopped and retracted, negative pressure can be generated in the valve cavity 2, the valve plate 12 is driven to turn over through the negative pressure and the retracted water flows, the valve plate 12 is rotated into the valve cavity 2, the waterproof sealing gasket 13 at the end part of the valve plate 12 slides over the waterproof sealing bump 14, the waterproof sealing gasket 13 is abutted against the inner wall of the connecting pipe 3, the waterproof sealing bump 14 is abutted against one side of the valve plate 12, and sealing is realized through the arrangement of the waterproof sealing gasket 13 and the waterproof sealing bump 14, can twist off hexagon bolt from fixing bolt 10's outer fringe face to with fixing bolt 10 unscrew in the threaded hole, through pulling pull ring 11, can mention valve gap 8, then conveniently maintain the inside of chamber groove 9 and valve pocket 2, this hydroelectric power plant drainage system check valve control structure, it is structuralized reasonable, through setting up double seal structure, effectively promoted the leakproofness, the practicality is strong.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A check valve control structure of a drainage system of a hydroelectric power plant comprises a spherical valve body (1) internally provided with a valve cavity (2) and connecting pipes (3) symmetrically constructed on two sides of the outer edge surface of the spherical valve body (1);

the method is characterized in that: but rotatably install valve plate (12) in valve pocket (2), the one end fixed mounting of valve plate (12) has waterproof sealing pad (13) of interference butt valve pocket (2) and connecting pipe (3) inner wall, the bottom fixed mounting of valve pocket (2) has the installation piece, and the fixed waterproof sealing lug (14) that are provided with butt valve plate (12) one side in top one side of installation piece.

2. A hydroelectric power plant drainage system check valve control structure as claimed in claim 1, wherein: the outer fringe face top of spherical valve body (1) is constructed and is had drain pipe (6), the up end of drain pipe (6) is constructed and is had mounting flange (7), the up end demountable installation of mounting flange (7) has valve gap (8), all set up chamber groove (9) of switch-on valve chamber (2) in drain pipe (6), mounting flange (7) and valve gap (8).

3. A hydroelectric power plant drainage system check valve control structure as claimed in claim 2, wherein: the upper end surface of the fixed flange (7) is provided with threaded holes in an annular array, and the upper end surface of the valve cover (8) is provided with fixed bolts (10) which can be screwed into the valve cover (8) and the threaded holes in an annular array.

4. A hydroelectric power plant drainage system check valve control structure as claimed in claim 3, wherein: hexagonal nut is installed in the screw-thread fit on the outer fringe face of fixing bolt (10), the up end fixed mounting placed in the middle of valve gap (8) has the boss, pull ring (11) are constructed between two parties at the top of boss.

5. A hydroelectric power plant drainage system check valve control structure as claimed in claim 2, wherein: demountable installation has filter screen (15) on the inner wall of chamber groove (9), equal fixed mounting in upper and lower terminal surface both sides of filter screen (15) has mounting panel (16) of butt chamber groove (9) inner wall, be provided with in mounting panel (16) and screw into spacing bolt (17) in drain pipe (6).

6. A hydroelectric power plant drainage system check valve control structure as claimed in claim 1, wherein: one end of the connecting pipe (3) far away from the spherical valve body (1) is fixedly provided with a connecting flange (4), and connecting holes (5) are formed in the connecting flange (4) in an annular array.