CN218863403U

CN218863403U - Butterfly valve capable of preventing butterfly plate from rotating accidentally

Info

Publication number: CN218863403U
Application number: CN202223499390.0U
Authority: CN
Inventors: 彭帮强; 林明深; 陈华贵
Original assignee: Zhejiang Huajiang Valve Co ltd
Current assignee: Zhejiang Huajiang Valve Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-04-14
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses a can prevent unexpected pivoted butterfly valve of butterfly plate, its technical scheme main points are including the valve body, be located the butterfly plate in the valve body, drive butterfly plate pivoted valve rod and can form hard sealed disk seat with the butterfly plate, a plurality of straight line holes that distribute around the butterfly plate axis have been seted up in the butterfly plate, a plurality of straight line holes all extend to on the outer wall of butterfly plate along the diametric (al) of butterfly plate, the butterfly plate is used for blockking set up the water conservancy diversion hole that communicates one by one with a plurality of straight line holes on the terminal surface of medium, all be provided with in a plurality of straight line holes and can prolong straight line hole rectilinear movement's top and touch pole fixed connection's spring with one end and top, a plurality of springs do not touch the pole one end of being connected with corresponding top and all touch with butterfly plate fixed connection, a plurality of top touch poles and place straight line hole sealing connection, through the medium get into the straight line hole and promote the top touch pole to move outside the butterfly plate and make a plurality of top touch poles all touch with valve body inner wall top, the problem that prior art meeting and result in turn over the butterfly plate and lead to the leakage is solved.

Description

Butterfly valve capable of preventing butterfly plate from rotating accidentally

Technical Field

The utility model relates to a butterfly valve technical field, more specifically the butterfly valve that can prevent the unexpected pivoted of butterfly plate that says so.

Background

The butterfly valve is a valve in which a closing member (a valve clack or a butterfly plate) is a disk and rotates around a valve shaft to achieve opening and closing, the closing member and the butterfly plate mainly play roles in cutting off and throttling on a pipeline, and when the butterfly valve is in a fully opened position, the thickness of the butterfly plate is resistance when a medium flows through a valve body, so that pressure drop generated by the valve is small, and the butterfly valve has good flow control characteristics. Butterfly valves, as a component for achieving on/off and flow control of pipeline systems, have been widely used in many fields such as petroleum, chemical engineering, metallurgy, and hydroelectric power.

The existing butterfly valve has the defects that when the butterfly valve is in a closed state, if the flow in a flow channel is too large and the pressure is too large, the phenomenon that the fluid overflows due to accidental overturning of a butterfly plate in the butterfly valve exists, and uncertainty exists.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a butterfly valve that closure state is stable.

In order to achieve the above purpose, the utility model provides a following technical scheme: a butterfly valve capable of preventing a butterfly plate from rotating accidentally comprises a valve body, the butterfly plate, a valve rod and a valve seat, wherein the butterfly plate is located in the valve body, the valve rod drives the butterfly plate to rotate, the valve seat can form hard sealing with the butterfly plate, a plurality of linear holes distributed around the axis of the butterfly plate are formed in the butterfly plate, the plurality of linear holes all extend to the outer wall of the butterfly plate along the diameter direction of the butterfly plate, flow guide holes communicated with the plurality of linear holes one by one are formed in the end face, used for blocking a medium, of the butterfly plate, it is a plurality of the downthehole top that all is provided with the straight line that can prolong straight line hole rectilinear movement touches the pole and touches pole fixed connection's spring with one end and top, and is a plurality of the spring is not all with butterfly plate fixed connection, a plurality of with the one end that corresponding top touches the pole and is connected the straight line hole sealing connection at place, through the medium get into the straight line downthehole and promote to push and touch the pole and move outside the butterfly plate and make a plurality of top touch poles all touch with the valve body inner wall top.

As a further improvement, the utility model discloses a plurality of the terminal surface that the top feeler lever touched with the valve body inner wall top is the sphere.

As a further improvement of the utility model, it is a plurality of the opening of water conservancy diversion hole on the butterfly plate all is close to the center setting of butterfly plate.

As a further improvement, the butterfly plate is not provided with a plurality of convex reinforcing ribs on the end face of the diversion hole.

As a further improvement of the utility model, a plurality of the equal part of top feeler lever is located corresponding strengthening rib.

The utility model has the advantages that: the three top contact rods are pushed by the medium, so that the three top contact rods can be in top contact with the inner wall of the valve body, and compared with the prior art, the butterfly plate has good stability when the medium circulation is blocked, and the defect that the butterfly plate is easy to overturn to cause leakage in the prior art is overcome; meanwhile, the top contact rod is in top contact with the inner wall of the valve body, so that the bending resistance of the butterfly plate when the butterfly plate is pushed by a medium can be improved, and the sealing stability between the butterfly plate and the valve seat is ensured.

Drawings

FIG. 1 is a front view of the present invention

Fig. 2 is a right sectional view of the present invention;

FIG. 3 is a partial perspective view of the middle butterfly plate of the present invention;

fig. 4 is an exploded view of the middle butterfly plate of the present invention.

Reference numerals: 1. a valve body; 2. a butterfly plate; 3. a valve stem; 4. a valve seat; 5. a linear hole; 6. a flow guide hole; 7. a top feeler lever; 8. a spring; 9. and (7) reinforcing ribs.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 4, the butterfly valve capable of preventing the butterfly plate from accidentally rotating of the embodiment includes a valve body 1, a butterfly plate 2 located in the valve body 1, a valve rod 3 driving the butterfly plate 2 to rotate, and a valve seat 4 capable of forming a hard seal with the butterfly plate 2;

based on the prior art, the butterfly plate 2 comprises a plate body which is in top contact with the valve seat 4 and a cover body which is far away from the valve seat 4, the valve rod 3 can penetrate through the plate body and is fixedly connected with the plate body, half-hole grooves which can jointly form the linear holes 5 are respectively arranged on the opposite end surfaces of the plate body and the cover body, the number of the linear holes 5 is three, the linear holes 5 are uniformly distributed around the axis of the butterfly plate 2, the three linear holes 5 all extend to the outer wall of the butterfly plate 2 along the diameter direction of the butterfly plate 2, the three linear holes 5 are not interfered with the valve rod 3, three flow guide holes 6 which are respectively communicated with the three half-hole grooves are arranged on the end surface of the plate body which is not provided with the half-hole grooves, the three flow guide holes 6 are all parallel to the axis of the butterfly plate 2, the top contact rod 7 comprises a sealing part which is matched with the inner diameter of the linear hole 5 and a rod body which is coaxially arranged with the sealing part and can extend out of the linear hole 5, the diameter of the rod body is smaller than that of the sealing part, a sealing ring is arranged on the outer wall of the sealing part, one end of a spring 8 is fixedly connected to the end face of the sealing part, which is not connected with the rod body, in a welding or clamping manner, the spring 8 and a top contact rod 7 are installed in a semi-hole groove of the plate body together, one end, which is not connected with the top contact rod 7, of the spring 8 can be fixedly connected with the inner wall of the semi-hole groove in a clamping or welding manner, the spring 8 is in a natural stretching state, the spring 8 and the top contact rod 7 are both positioned in the semi-hole groove, then the cover body is covered on the plate body and fastened by bolts, the surfaces, which are mutually attached to the cover body and the plate body, form hard sealing, and the three top contact rods 7 and the three springs 8 are both limited in the butterfly plate 2;

when the butterfly plate 2 blocks medium circulation, the medium enters the linear hole 5 through the flow guide hole 6, the medium pushes the three top touch rods 7 to linearly move towards the outside of the butterfly plate 2 until the end parts of the three top touch rods 7 are in top contact with the inner wall of the valve body 1, and the three springs 8 are stretched to generate elastic potential energy; in the opening process, the butterfly plate 2 rotates along with the valve rod 3, the three top contact rods 7 slide relative to the inner wall of the valve body 1 and can be partially withdrawn into the linear holes 5, the thrust exerted by a medium on the three top contact rods 7 is reduced along with the circulation of the medium and the increase of the flow, the spring 8 recovers deformation, and the three top contact rods 7 are withdrawn into the linear holes 5;

compared with the prior art, the design can ensure that the butterfly plate 2 has good stability when blocking medium circulation, and makes up for the defect that the butterfly plate 2 is easy to turn over to cause leakage in the prior art; meanwhile, the top contact rod 7 is in top contact with the inner wall of the valve body 1, so that the bending resistance of the butterfly plate 2 when the butterfly plate is pushed by a medium can be improved, and the sealing stability between the butterfly plate 2 and the valve seat 4 is ensured.

As a specific embodiment of the improvement, referring to fig. 1 and 4, the end surfaces of the three abutting rods 7 abutting against the inner wall of the valve body 1 are all spherical surfaces, so that the wear and friction between the abutting rods 7 and the inner wall of the valve body 1 can be reduced, and the valve body 1 can be conveniently opened.

As a modified specific embodiment, referring to fig. 4, the openings of the three diversion holes 6 on the butterfly plate 2 are all arranged near the center of the butterfly plate 2, so that compared with the design that the openings of the diversion holes 6 are near the edge of the butterfly plate 2, the design can avoid the phenomenon that the diversion holes 6 at the lower positions are easy to be blocked by entering impurities.

As a specific embodiment of the improvement, referring to fig. 1 to 4, three raised reinforcing ribs 9 are arranged on the end surface of the cover body where the half-hole groove is not formed, the three half-hole grooves are respectively arranged in parallel with the three reinforcing ribs 9, and the three half-hole grooves are respectively recessed into the three reinforcing ribs 9, so that the top contact rod 7 is partially limited in the reinforcing ribs 9, and the design of the reinforcing ribs 9 can further improve the structural stability of the butterfly plate 2; compared with the design that the straight line holes 5 correspond to the reinforcing ribs 9, the design that the straight line holes 5 and the reinforcing ribs 9 are staggered enables the structure of the butterfly plate 2 to be thick and uniform in distribution and has good structural stability.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a can prevent unexpected pivoted butterfly valve of butterfly plate, includes valve body (1), is located butterfly plate (2) of valve body (1), drives butterfly plate (2) pivoted valve rod (3) and can form hard sealed disk seat (4) with butterfly plate (2), its characterized in that: the butterfly plate is characterized in that a plurality of linear holes (5) distributed around the axis of the butterfly plate (2) are formed in the butterfly plate (2), the linear holes (5) extend to the outer wall of the butterfly plate (2) along the diameter direction of the butterfly plate (2), the butterfly plate (2) is used for blocking a medium, flow guide holes (6) communicated with the linear holes (5) one by one are formed in the end face of the medium, a plurality of top contact rods (7) capable of moving linearly along the linear holes (5) and springs (8) fixedly connected with the top contact rods (7) at one ends are arranged in the linear holes (5), the springs (8) are fixedly connected with the butterfly plate (2) at the ends not connected with the corresponding top contact rods (7), the top contact rods (7) are connected with the linear holes (5) in a sealing mode, and enter the linear holes (5) through the medium and push the top contact rods (7) to move outwards towards the butterfly plate (2), so that the top contact rods (7) and the inner wall of the valve body (1) are contacted.

2. A butterfly valve for preventing accidental rotation of a butterfly plate according to claim 1, wherein: the end surfaces of the plurality of jacking rods (7) and the inner wall of the valve body (1) are spherical surfaces.

3. A butterfly valve for preventing accidental rotation of a butterfly plate according to claim 1 or 2, characterized in that: the openings of the plurality of flow guide holes (6) on the butterfly plate (2) are arranged close to the center of the butterfly plate (2).

4. A butterfly valve for preventing accidental rotation of a butterfly plate according to claim 1 or 2, characterized in that: the end face of the butterfly plate (2) which is not provided with the diversion holes (6) is provided with a plurality of raised reinforcing ribs (9).

5. The butterfly valve of claim 4, wherein the butterfly plate is adapted to prevent accidental rotation of the butterfly plate, and further comprising: the top contact rods (7) are all partially positioned in the corresponding reinforcing ribs (9).