CN113154058A

CN113154058A - Automatic butterfly valve of locking

Info

Publication number: CN113154058A
Application number: CN202110329808.4A
Authority: CN
Inventors: 林哲; 陶俊宇; 杨林; 朱祖超; 张昊
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-23
Anticipated expiration: 2041-03-26
Also published as: CN113154058B

Abstract

The invention discloses an automatic locking butterfly valve, which comprises a valve body and a valve plate, wherein the back surface of the valve plate is provided with a plurality of guide grooves at equal intervals along the circumferential direction, the valve plate is connected with an upper valve rod through a pin, the top end of the upper valve rod is connected with a hand wheel through a key, the bottom end of the upper valve rod is provided with a lower valve rod, an end shaft below the upper valve rod is matched with an end hole above the lower valve rod, the top of the lower valve rod is provided with an automatic fastening boss, the bottom end of the valve body is connected with a sealed lower valve seat through a bolt, the top of the valve body is connected with a sealing pressure plate through a bolt, the back of the valve plate is provided with an upper expanding piece, a left expanding piece, a lower expanding piece and a right expanding piece, and one end of the upper expanding piece, which is opposite to the lower expanding piece, is provided with a boss expanding groove, and the automatic locking butterfly valve has the advantages that: the lower valve rod can be replaced according to different working environment temperatures to adjust the length and the angle of the automatic fastening boss so as to achieve better working performance.

Description

Automatic butterfly valve of locking

Technical Field

The invention relates to the technical field of valves, in particular to an automatic locking butterfly valve.

Background

With the rapid development of Chinese economy, when minerals or experimental samples are collected in deep sea and polar regions, or when a gas pipeline on a west-east gas transmission line operates in winter, because the valve works in a low-temperature environment, the existing valve generally has the condition that the sealing ring is not sealed tightly due to cold contraction.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The technical task of the invention is to provide an automatic locking butterfly valve aiming at the defects, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an automatic locking butterfly valve comprises a valve body and a valve plate, wherein the back surface of the valve plate is provided with a plurality of guide grooves at equal intervals along the circumferential direction, the valve plate is connected with an upper valve rod through a pin, the top end of the upper valve rod is connected with a hand wheel through a key, the bottom end of the upper valve rod is provided with a lower valve rod, an end shaft below the upper valve rod is matched with an end hole above the lower valve rod, the top of the lower valve rod is provided with an automatic fastening boss, the bottom end of the valve body is connected with a sealed lower valve seat through a bolt, the top of the valve body is connected with a sealing pressure plate through a bolt, the back of the valve plate is provided with an upper expanding piece, a left expanding piece, a lower expanding piece and a right expanding piece, the upper expansion piece and the lower expansion piece are provided with boss expansion grooves at the opposite ends, a main sealing ring is arranged inside the valve body, and one side of the main sealing ring is connected with a main sealing ring pressing plate through a screw.

Furthermore, the central axis of the automatic fastening boss coincides with the central axis of the inner hole of the flow passage of the valve body.

Further, the bottom of lower valve rod is equipped with hexagonal prism, the bottom of sealed lower disk seat is equipped with the hexagonal hole, hexagonal prism with hexagonal hole phase-match.

Further, the boss expanding groove is an elliptical groove.

Furthermore, the back of the valve plate is provided with a sealing expansion ring.

Further, the outer side surface of the valve plate is designed to be a spherical surface.

Further, the peripheries of the upper expanding piece, the left expanding piece, the lower expanding piece and the right expanding piece are mutually matched to form a circumference shape.

Further, the seal expanding ring is mounted to the outer sides of the upper expanding piece, the left expanding piece, the lower expanding piece and the right expanding piece.

The invention has the beneficial effects that:

1. through the seal ring expanding arranged on the valve plate, the valve can play a role in auxiliary sealing when in a closed state, and is particularly suitable for working when the main seal ring deforms at a low temperature under the condition of a low temperature, so that a good auxiliary sealing effect is achieved. And the lower valve rod can be replaced according to different working environment temperatures to adjust the length and the angle of the automatic fastening boss so as to achieve better working performance.

2. The spherical surface formed by the main surface of the valve plate can greatly reduce the stress of the valve during low-temperature work, reduce the deformation of the valve plate during work and greatly improve the sealing property and the stability.

3. Through the cooperation of the hexagonal prism that lower valve rod set up and the hexagonal hole that sealed lower disk seat set up and the cooperation of the end axle and the end hole of upper and lower valve rod junction, the stability of two valve rod valves about promoting has promoted the reliability of valve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an automatic locking butterfly valve according to an embodiment of the invention;

FIG. 2 is a side view of an auto-locking butterfly valve according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a seal expanding ring in an automatic locking butterfly valve according to an embodiment of the invention;

FIG. 4 is a schematic structural diagram of a hexagonal inner hole of an automatic locking butterfly valve according to an embodiment of the invention;

FIG. 5 is a schematic structural diagram of an automatic fastening boss in an automatic locking butterfly valve according to an embodiment of the invention;

FIG. 6 is a schematic structural diagram of a right expansion piece of an automatic locking butterfly valve according to an embodiment of the invention;

fig. 7 is an enlarged view at a in fig. 2.

Reference numerals:

1. the automatic valve comprises a hand wheel, 2 parts of a sealing pressing plate, 3 parts of a valve body, 4 parts of a valve plate, 5 parts of a sealing lower valve seat, 6 parts of an upper valve rod, 7 parts of a lower valve rod, 8 parts of a main sealing ring, 9 parts of a main sealing ring pressing plate, 10 parts of a sealing expanding ring, 4-1 parts of an upper expanding part, 4-2 parts of a left expanding part, 4-3 parts of a right expanding part, 5-1 parts of a hexagonal inner hole, 7-1 parts of an automatic fastening boss, 7-2 parts of a hexagonal prism of the lower valve rod, 11 parts of a boss expanding groove.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

The first embodiment is as follows:

referring to fig. 1-7, the butterfly valve with automatic locking according to the embodiment of the invention comprises a valve body 3 and a valve plate 4, wherein the back of the valve plate 4 is provided with 4 guide grooves 4-5 at equal intervals along the circumferential direction, the valve plate 4 is connected with an upper valve rod 6 through a pin, the top end of the upper valve rod 6 is connected with a hand wheel 1 through a key, the bottom end of the upper valve rod 6 is provided with a lower valve rod 7, an end shaft below the upper valve rod 6 is matched with an end hole above the lower valve rod 7, the top of the lower valve rod 7 is provided with an automatic fastening boss 7-1, the bottom end of the valve body 3 is connected with a lower sealing valve seat 5 through a bolt, the top of the valve body 3 is connected with a sealing pressure plate 2 through a bolt, the back of the valve plate 4 is provided with an upper expanding piece 4-1, a left expanding piece 4-2, a lower expanding piece 4-3 and a right expanding piece 4-4, the end, opposite to the lower expanding piece 4-3, of the upper expanding piece 4-1 is provided with a boss expanding groove 11, a main sealing ring 8 is installed inside the valve body 3, one side of the main sealing ring 8 is connected with a main sealing ring pressing plate 9 through a screw, the upper valve rod 6 is in clearance fit with the lower valve rod 7, the lower valve rod 7 is axially fixed by matching with a sealed lower valve seat, and the upper valve rod 6 is axially fixed by matching the shaft end of the lower part of the upper valve rod 6 with the end hole of the lower valve rod 7; the main seal ring 8 is fixed by the bolt connection of the main seal ring pressure plate 9 and the valve body 3.

Through the scheme of the invention, the lower valve rod 7 can be replaced according to different working environment temperatures to adjust the length and the angle of the automatic fastening boss 7-1 so as to achieve better working performance.

Example two:

referring to fig. 1 to 7, for the automatic fastening boss 7-1, a central axis of the automatic fastening boss 7-1 coincides with a central axis of a flow passage inner hole of the valve body 3, for the lower valve stem 7, a bottom end of the lower valve stem 7 is provided with a hexagonal prism 7-2, a bottom end of the sealing lower valve seat 5 is provided with a hexagonal inner hole 5-1, the hexagonal prism 7-2 is matched with the hexagonal inner hole 5-1, for the boss expanding groove 11, the boss expanding groove 11 is an elliptical groove, for the valve plate 4, a back portion of the valve plate 4 is provided with a sealing expanding ring 10, for the valve plate 4, an outer side surface of the valve plate 4 is designed to be a spherical surface, and for the upper expanding piece 4-1, the left expanding piece 4-2, the lower expanding piece 4, the upper expanding piece 4, the lower expanding piece, and the lower expanding piece 4, the valve plate, the lower valve plate, and the lower valve plate, the upper valve plate, the lower valve plate, and the lower valve plate, the upper and the lower valve plate, the upper and the lower valve plate, the upper and the lower valve plate, the upper and the lower valve plate, the upper and the lower valve, the lower valve plate, the upper and the lower valve, the lower valve plate, the upper and the lower valve plate, the upper and the lower valve, the lower valve plate, the lower valve, the upper and the lower valve, the upper and lower valve, the upper and the lower valve, the upper and lower valve, the, The peripheries of the lower expanding piece 4-3 and the right expanding piece 4-4 are mutually matched to form a circumference shape, and for the sealing expanding ring 10, the sealing expanding ring 10 is installed on the outer sides of the upper expanding piece 4-1, the left expanding piece 4-2, the lower expanding piece 4-3 and the right expanding piece 4-4, wherein the four expanding pieces expand the sealing expanding ring 10 to the maximum and are tightly matched with the valve body 3 to realize auxiliary sealing; the expansion of the four expanding pieces is realized by the matching of the automatic fastening boss 7-1 and the boss expansion groove 11 on the lower valve rod 7, when the valve plate 4 is in a full-closed state from a certain angle of an opening state, the automatic fastening boss 7-1 is squeezed into the closed boss expansion groove 11, so that the four expanding pieces synchronously move towards four main directions, the expansion of the sealing expanding ring 10 is realized, when the valve is fully closed, the sealing expanding ring 10 is expanded to the maximum, and the further fastening and sealing in the full-closed state are realized. When the valve is opened, the automatic fastening boss 7-1 gradually comes off, and the four expansion pieces are contracted to the minimum state due to the contraction of the sealing expansion ring 10 so as not to obstruct the flow of fluid.

Through the scheme of the invention, the arranged seal expanding ring 10 can play a role of auxiliary sealing when the valve is in a closed state, is particularly suitable for working when the main seal ring 8 deforms at low temperature under the condition of low temperature, and plays a good auxiliary sealing effect.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

When the practical application, rotate through hand wheel 1, drive and go up valve rod 6 and rotate, go up valve rod 6 and pass through the key-type connection with torque transfer for valve plate 4, wherein drive valve plate 4 only go up valve rod 6, lower valve rod 7 and sealed lower disk seat 5 cooperation are fixed and are played the supporting role to valve plate 4 to the axis of automatic fastening boss 7-1 on the lower valve rod 7 coincides with the runner axis all the time, during the closed condition: valve plate 4 is by opening the in-process of moving to closing, and automatic fastening boss 7-1 gets into boss expansion recess 11 after reaching a certain given angle, and then makes four expand the piece and enlarge along with the angle of opening diminishes, and sealed expanding ring 10 expands outward when the valve full cut closes to closely cooperate with 3 inner walls of valve body to realize inseparabler supplementary seal, during the open mode: when the valve plate 4 is opened from a fully closed state, the automatic fastening boss 7-1 automatically separates from the boss expansion groove 11, the four expansion pieces contract under the contraction force of the sealing expansion ring 10, and when the valve plate is opened to a certain specific angle, the contraction is minimum, and the flow of fluid is not influenced

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 an automatic locking butterfly valve, its characterized in that, includes valve body (3) and valve plate (4), the back of valve plate (4) is according to circumferencial direction equidistant set up quantity for 4 guide slot (4-5), valve plate (4) have last valve rod (6) through pin joint, the top of going up valve rod (6) has hand wheel (1) through the key-type connection, the bottom of going up valve rod (6) is equipped with down valve rod (7), the end shaft of going up valve rod (6) below with the end hole phase-match of valve rod (7) top down, the top of lower valve rod (7) is equipped with automatic fastening boss (7-1), there is sealed lower disk seat (5) bottom of valve body (3) through bolted connection, there is seal pressure plate (2) at the top of valve body (3) through bolted connection, the installation of valve plate (4) is last to expand piece (4-1), Expand piece (4-2), expand piece (4-3) and right side and expand piece (4-4) down on a left side, go up expand piece (4-1) with expand the relative one end of piece (4-3) down and all seted up boss expansion recess (11), the internally mounted of valve body (3) has main sealing washer (8), there is main sealing washer clamp plate (9) one side of main sealing washer (8) through the screw connection.

2. The self-locking butterfly valve according to claim 1, characterised in that the central axis of the self-tightening boss (7-1) coincides with the central axis of the inner bore of the flow channel of the valve body (3).

3. The automatic locking butterfly valve according to claim 1, characterized in that the lower valve rod (7) is provided with a hexagonal prism (7-2) at the bottom end, the lower sealing valve seat (5) is provided with a hexagonal inner hole (5-1) at the bottom end, and the hexagonal prism (7-2) is matched with the hexagonal inner hole (5-1).

4. The self-locking butterfly valve according to claim 1, characterised in that said boss expansion recess (11) is an oblong slot.

5. The self-locking butterfly valve according to claim 1, characterised in that the back of the valve plate (4) is provided with a sealing expander (10).

6. The self-locking butterfly valve according to claim 1, characterised in that the outer lateral surface of the valve plate (4) is designed as a spherical surface.

7. The self-locking butterfly valve according to claim 1, characterized in that the periphery of said upper expanding piece (4-1), said left expanding piece (4-2), said lower expanding piece (4-3) and said right expanding piece (4-4) are mutually fitted into a circumferential shape.

8. The self-locking butterfly valve according to claim 7, characterised in that the sealing expander (10) is mounted to the outside of the upper expander (4-1), the left expander (4-2), the lower expander (4-3) and the right expander (4-4).