CN212251187U

CN212251187U - Butterfly valve

Info

Publication number: CN212251187U
Application number: CN202020862078.5U
Authority: CN
Inventors: 赖志杰; 蔡达丽
Original assignee: Jinjiang Junao Valve Co ltd
Current assignee: Jinjiang Junao Valve Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-12-29
Anticipated expiration: 2030-05-21

Abstract

The utility model discloses a butterfly valve, which comprises a valve body, a valve seat and a butterfly plate which are arranged inside the valve body, a driving device for driving the butterfly plate to rotate, and a driving part for connecting the butterfly plate and the driving device, wherein the butterfly plate comprises a base plate and a movable expansion plate; the driving part includes: the threaded rod is rotationally connected with the driving device; two coupling assembling, two coupling assembling all sets up the outside at the threaded rod to be used for driving the expansion plate and remove. The utility model discloses in, the inside of valve body is provided with disk seat, drive arrangement and butterfly plate, and the butterfly plate comprises base plate, expansion plate, and the inside of base plate is provided with the drive division, and this design is compared and is difficult for producing the scraping with the disk seat when traditional butterfly plate passes through the removal messenger butterfly plate of expansion plate to reduce the wearing and tearing after the butterfly plate uses for a long time, and then the life of extension butterfly valve and the sealing performance who keeps the butterfly valve are stable.

Description

Butterfly valve

Technical Field

The utility model relates to a butterfly valve technical field especially relates to a 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 which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.

The butterfly valve is closed and opened by the rotation of the butterfly plate, the existing butterfly plate is continuously contacted with the valve seat in the long-term use process, the butterfly valve is easily abraded and even broken due to long-term extrusion and scraping, the maintenance cost of a user is increased, and the potential safety hazard is even brought to the use of the user.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problems, a butterfly valve is provided.

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

a butterfly valve comprises a valve body, a valve seat and a butterfly plate which are arranged in the valve body, a driving device for driving the butterfly plate to rotate, and a driving part for connecting the butterfly plate and the driving device, wherein the butterfly plate comprises a base plate and a movable expansion plate;

the driving part includes:

the threaded rod is rotationally connected with the driving device;

two coupling assembling, two coupling assembling all sets up the outside at the threaded rod to be used for driving the expansion plate and remove.

As a further description of the above technical solution:

coupling assembling include the thread bush, with the expansion plate with the thread bush all rotates the connecting rod and the fixed dog that sets up on the threaded rod that sets up, the dog is located the below of thread bush.

As a further description of the above technical solution:

the two connecting assemblies are symmetrically arranged on the upper side and the lower side of the expansion plate.

As a further description of the above technical solution:

the inside of base plate is provided with the guide way that runs through, the expansion plate is located the guide way to along the guide way slip.

As a further description of the above technical solution:

and a sealing element is embedded on the inner wall of the guide groove and is made of any one of polytetrafluoroethylene, nylon and polyphenyl ester.

As a further description of the above technical solution:

the outer surface wall of the expansion plate is attached to the sealing element.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, the inside of valve body is provided with disk seat, drive arrangement and butterfly plate, and the butterfly plate comprises base plate, expansion plate, and the inside of base plate is provided with the drive division, and this design is compared and is difficult for producing the scraping with the disk seat when traditional butterfly plate passes through the removal messenger butterfly plate of expansion plate to reduce the wearing and tearing after the butterfly plate uses for a long time, and then the life of extension butterfly valve and the sealing performance who keeps the butterfly valve are stable.

2. The utility model discloses in, the drive division is provided with screw thread, thread bush, connecting rod and dog, and it is rotatory to drive the threaded rod through drive arrangement, makes the thread bush along the axial displacement of threaded rod, and then drives the expansion plate through the connecting rod and remove, simultaneously behind thread bush contact dog, can drive the whole rotation of butterfly plate along with the continuation rotation of threaded rod, realizes the flow regulation of medium.

Drawings

Fig. 1 shows a schematic structural diagram of closing of a butterfly plate inside a valve body according to an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of opening of a butterfly plate inside a valve body according to an embodiment of the present invention;

fig. 3 shows a schematic side view of a butterfly plate provided according to an embodiment of the present invention.

Illustration of the drawings:

1. a valve body; 2. a valve seat; 3. a drive device; 4. a substrate; 5. a retractable plate; 6. a threaded rod; 7. a threaded sleeve; 8. a connecting rod; 9. a stopper; 10. and a seal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a butterfly valve comprises a valve body 1, a valve seat 2 and a butterfly plate which are arranged in the valve body 1, a driving device 3 for driving the butterfly plate to rotate, and a driving part for connecting the butterfly plate and the driving device 3, wherein the butterfly plate comprises a base plate 4 and a movable expansion plate 5;

the drive section includes: the threaded rod 6 is rotationally connected with the driving device 3; the two connecting components are arranged on the outer side of the threaded rod 6 and are used for driving the expansion plate 5 to move;

the telescopic plate 5 on the butterfly plate is driven by the driving part to move to reduce the contact area with the valve seat 2, so that the abrasion of the butterfly plate is reduced.

Specifically, as shown in fig. 1, coupling assembling includes thread bush 7, all rotate the connecting rod 8 and the fixed dog 9 that sets up on threaded rod 6 that set up with expansion plate 5 and thread bush 7, dog 9 is located the below of thread bush 7, it is rotatory to drive threaded rod 6 through drive arrangement 3, thread bush 7 can remove along the axial direction of threaded rod 6, and then pull expansion plate 5 through connecting rod 8, can't continue to remove after the dog 9 is supported to thread bush 7, can drive the whole rotation of butterfly plate along with the rotation of threaded rod 6 this moment.

Specifically, as shown in fig. 2, two coupling assembling symmetries set up in the upper and lower both sides of expansion plate 5, and the coupling assembling that two symmetries set up helps improving the stability that expansion plate 5 removed when driving expansion plate 5 and removing.

Specifically, as shown in fig. 2, a through guide groove is formed in the base plate 4, the expansion plate 5 is located in the guide groove and slides along the guide groove, the expansion plate 5 moves in the guide groove to realize expansion and contraction, scraping between the expansion plate and the valve seat 2 is reduced when the butterfly plate rotates, and therefore the butterfly plate is not prone to damage, and the service life of the butterfly valve is prolonged.

Specifically, as shown in fig. 3, a sealing member 10 is embedded in an inner wall of the guide groove, the sealing member 10 is made of any one of polytetrafluoroethylene, nylon, and polyphenyl grease, the outer surface wall of the expansion plate 5 is attached to the sealing member 10, and the sealing member 10 is used for sealing a connection between the base plate 4 and the expansion plate 5, so that a medium is not easy to pass through the butterfly plate to cause leakage.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A butterfly valve comprises a valve body (1), a valve seat (2) and a butterfly plate which are arranged inside the valve body (1), and a driving device (3) for driving the butterfly plate to rotate, and is characterized by further comprising a driving part for connecting the butterfly plate and the driving device (3), wherein the butterfly plate comprises a base plate (4) and a movable expansion plate (5);

the driving part includes:

the threaded rod (6), the said threaded rod (6) is connected with drive unit (3) rotatably;

two coupling assembling, two coupling assembling all sets up in the outside of threaded rod (6) to be used for driving expansion plate (5) and remove.

2. A butterfly valve according to claim 1, characterised in that said connection assembly comprises a threaded sleeve (7), a connection rod (8) rotatably associated with both said telescopic plate (5) and said threaded sleeve (7), and a stop (9) fixedly associated with the threaded rod (6), said stop (9) being located below the threaded sleeve (7).

3. A butterfly valve according to claim 1, characterised in that said two connection members are arranged symmetrically on the upper and lower sides of the expansion plate (5).

4. A butterfly valve according to claim 1, characterised in that the base plate (4) is internally provided with a through guide slot, in which the expansion plate (5) is positioned and slides along.

5. A butterfly valve according to claim 4, characterized in that a sealing member (10) is embedded in the inner wall of the guide groove, and the material of the sealing member (10) is any one of polytetrafluoroethylene, nylon and polyphenyl grease.

6. A butterfly valve according to claim 5, characterised in that the outer wall of the plate (5) conforms to the seal (10).