CN210949918U

CN210949918U - Butterfly valve

Info

Publication number: CN210949918U
Application number: CN201920602450.6U
Authority: CN
Inventors: 张海跃
Original assignee: Zhejiang Flutian Valve Manufacturing Co ltd
Current assignee: Zhejiang Flutian Valve Manufacturing Co ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-07-07
Anticipated expiration: 2029-04-29

Abstract

The utility model relates to a butterfly valve, which comprises a valve body, a disc plate, a valve rod, a disc plate coating layer and a protective layer, wherein when the upper valve body and the lower valve body are connected, two through grooves form a ring groove, a through hole for the valve rod to penetrate is arranged on the upper valve body, and one end of the through hole, which is close to the through groove, is provided with a first groove with a diameter larger than that of the through hole; the lower valve body is provided with a third groove and a fourth groove, and the center of the fourth groove and the center of the through hole are on the same axis; all be equipped with seal assembly in recess three and the recess one, seal assembly includes lamination stack, gasket and seal gasket, and the cladding of dish board coating is on the surface of dish board, and the inoxidizing coating includes the body and is located the annular piece that body bilateral symmetry set up. According to the butterfly valve, the sealing assemblies are arranged on the upper surface and the lower surface of the disc plate, the sealing assemblies can be selectively sleeved on the valve rod and the shaft head during assembly, and then the upper valve body and the lower valve body are clamped and fixed, so that main assembly work of the butterfly valve is completed. The disc plate coating layer and the inner wall of the body of the protective layer directly form a sealing surface, and the two annular sheets play a role of a sealing gasket when the butterfly valve is installed.

Description

Butterfly valve

Technical Field

The utility model belongs to the technical field of the valve technique and specifically relates to a butterfly valve.

Background

The butterfly valve is also called a flap valve and has wide application. The opening and closing piece of the butterfly valve is a circular disc plate and rotates around the axis of the butterfly valve body, so that the purposes of opening, closing and adjusting are achieved. The valve is applied to the pipeline, one of the most important performance requirements of the valve is sealing, the sealing performance of the valve and the sealing performance between the valve and the connecting pipeline are easy to cause problems, the sealing of the existing butterfly valve is that a packing box is arranged at the position close to the top of a valve rod, packing is arranged in the packing box and then pressed and fixed by a gland, and then the sealing effect is achieved.

SUMMERY OF THE UTILITY MODEL

To the not enough in the background art, the utility model provides a butterfly valve to overcome above defect.

The utility model provides a technical scheme that its technical problem adopted is:

a butterfly valve comprises a valve body, a disc plate, a valve rod, a disc plate coating layer and a protective layer, wherein the valve body comprises an upper valve body and a lower valve body, the upper valve body and the lower valve body are fixed through bolts, the upper valve body and the lower valve body form a channel, the disc plate is positioned in the channel, through grooves are formed in the opposite surfaces of the upper valve body and the lower valve body, when the upper valve body and the lower valve body are connected, two through grooves form an annular groove, a through hole for the valve rod to penetrate through is formed in the upper valve body, one end, close to the through groove, of the through hole is; the lower valve body is provided with a third groove, the bottom of the third groove is provided with a fourth groove, the third groove and the fourth groove form a step groove, and the center of the fourth groove and the center of the through hole are on the same axis; the three grooves and the first groove are symmetrically provided with sealing assemblies, each sealing assembly comprises a lamination set, a gasket and a sealing gasket which are sequentially arranged, the coating layer of the plate is coated on the outer surface of the plate, the protective layer comprises a body and annular pieces which are symmetrically arranged on two sides of the body, and annular protrusions which are used in opposite directions with the through grooves are arranged on the periphery of the body.

Ears of holes to be used are arranged on the upper valve body and the lower valve body.

The gasket is made of stainless steel.

The sealing gasket is provided with an O-shaped ring in an embedded mode, the O-shaped ring is abutted to the valve rod, and the disc plate coating layer is provided with a sealing ring in an embedded mode.

The valve rod is connected to dish board one end, and the other end is connected with the spindle nose, and the one end that the dish board was kept away from to the spindle nose wears to establish the seal assembly who is located recess three and arranges in recess four.

The lamination stack is composed of a centrally recessed annular metal sheet.

By adopting the technical scheme, the problem of low assembly efficiency of the existing butterfly valve is effectively improved, the butterfly valve is reasonable and simple in structural design, the sealing assembly is arranged on the upper surface and the lower surface of the disc plate, the sealing assembly can be selectively sleeved on the valve rod and the shaft head when the butterfly valve is assembled, and then the upper valve body and the lower valve body are oppositely clamped and fixed, so that the main assembly work of the butterfly valve is completed, and the butterfly valve is simple to operate. Meanwhile, the surface of the disc plate is provided with a disc plate coating layer which directly forms a sealing surface with the inner wall of the body of the protective layer, and the two annular sheets play a role of a sealing gasket when the butterfly valve is installed, so that the installation efficiency is also improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the connection structure of the disc 2 and the protective layer 9.

Fig. 3 is a partially enlarged schematic view of fig. 1.

Fig. 4 is a schematic structural view of the lamination stack 71.

Fig. 5 is a schematic view of the use and installation structure of the present invention.

Detailed Description

Referring to fig. 1 to 5, the present invention: a butterfly valve comprises a valve body 1, a disc plate 2, a valve rod 3, a disc plate coating layer 8 and a protective layer 9, wherein the valve body 1 comprises an upper valve body 11 and a lower valve body 12, the upper valve body and the lower valve body are fixed through bolts, the upper valve body and the lower valve body form a channel, the disc plate 2 is positioned in the channel, through grooves 4 are formed in the opposite surfaces of the upper valve body 11 and the lower valve body 12, the two through grooves 4 form an annular groove 41 when the upper valve body and the lower valve body are connected, a through hole 5 for the valve rod 3 to penetrate through is formed in the upper valve body 11, a first groove 51 with the diameter larger than that of the through hole 5 is formed in one end, close to the through groove, of the through hole 5; a third groove 61 is formed in the lower valve body 12, a fourth groove 62 is formed in the bottom of the third groove 61, the third groove 61 and the fourth groove 62 form a step groove 6, and the center of the fourth groove 62 and the center of the through hole 5 are on the same axis; the symmetry is equipped with seal assembly 7 in three 61 of recess and a 51 of recess, seal assembly 7 is including the lamination group 71, gasket 72 and the seal gasket 73 that set gradually, the cladding of dish board coating 8 is on the surface of dish board 2, inoxidizing coating 9 includes body 91 and is located body 91 both sides and the annular piece 92 of symmetry setting, is equipped with in the body 91 periphery and leads to groove 4 annular protruding 93 to the usefulness. The protective layer 9 and the disc coating layer 8 are made of plastic materials, so that when the disc 3 is closed, the disc coating layer 8 coated on the surface of the disc contacts with the inner wall of the body 91 to form a sealing surface.

Ears 01 of holes to be used are arranged on the upper valve body and the lower valve body. Ear 01 is used for the installation of butterfly valve, and the butterfly valve of this application adopts mounting means when butt-clamping, as shown in figure 5, the butterfly valve is located between two pipelines 02, and is equipped with the flange 03 that corresponds with ear 01 on the pipeline 02, is equipped with the hole on the flange confession 03, wears to establish the hole on flange 03 and the hole on the ear 01 simultaneously through screw rod 04, and it is fixed to revolve wrong the screw with nut 05 of rethread, and final two pipelines 02 dock the butterfly valve in its centre. In the process, the annular sheets 92 on both sides of the upper and lower valve bodies 1 play a role in sealing, and the annular sheets 92 are located between the pipeline 02 and the valve bodies 1.

The gasket 72 is made of stainless steel.

An O-shaped ring 74 is embedded on the sealing gasket 73, the O-shaped ring 74 is abutted against the valve rod 3, and a sealing ring 81 is embedded on the disc plate coating layer 8.

The valve rod 3 is connected to 2 one ends of dish, and the other end is connected with spindle nose 10, and the one end that the dish 2 was kept away from to spindle nose 10 is worn to establish the seal assembly 7 that is located recess three 61 and is arranged in recess four 62.

The lamination stack 71 is composed of a centrally recessed annular metal sheet. Preferably, there are two annular metal sheets with central depressions, the depressions being oriented oppositely, as shown in fig. 4, to form a stack 71 of resilient laminations.

When the butterfly valve is assembled, firstly, the valve rod 3 and the shaft head 10 are respectively and fixedly connected with the disc plate 2; secondly, coating a disc coating layer 8 on the outer surface of the disc 2, wherein the disc coating layer 8 extends to the valve rod 3 and the spindle head 10, as shown in fig. 3, the disc coating layer 8 extending to the valve rod 3 and the spindle head 10 is contacted with the sealing component 7, and specifically, the O-shaped ring 74 is contacted with the disc coating layer 8 extending to the valve rod 3 to form sealing; then as shown in figure 2, the valve rod 3 and the shaft head 10 respectively penetrate through the protective layer 9, and the protective layer 9 is rotatably connected with the valve body; finally, as shown in fig. 1, the upper and lower valve bodies are clamped and fixed to form the valve body 1, in the process, the annular protrusion 93 is aligned with the two through grooves 4 to form the annular groove 41 when the upper and lower valve bodies are connected, the body 91 is opposite to the inner wall of the valve body 1, two symmetrical annular sheets 92 are respectively located on two sides of the valve body 1, one end of the spindle head 10, which is far away from the disc plate 2, penetrates through the sealing assembly 7 arranged in the groove three 61 and is arranged in the groove four 62, and the valve rod 3 penetrates through the sealing assembly 7 arranged in the groove one 51. When the upper and lower valve bodies are brought closer to each other, the stack 71 above and below the plate 2 is compressed and the sealing ring 81 seals against the gasket 73.

As shown in fig. 3, the lamination stack 71 is disposed at the bottom of the groove and closely attached to the gasket 72, the gasket 73 is disposed at the top, the gasket 73 prevents the medium from washing out of the lamination stack 71, and further affects the usability and the life of the lamination stack 71, the gasket 72 is made of stainless steel, and plays a transitional role, so that the elastic force of the lamination stack 71 can be uniformly applied to the gasket 73.

The utility model discloses the effectual problem that has improved current butterfly valve packaging efficiency low, this butterfly valve structural design is reasonable simple, through set up seal assembly 71 on the upper and lower face at dish board 3, when the equipment, can select to put seal assembly 71 cover on valve rod 3 and spindle nose 10, then will go up the main equipment work of valve body double-layered fixed butterfly valve of accomplishing promptly, easy operation. Meanwhile, the disc plate coating layer 8 is arranged on the surface of the disc plate 2 and directly forms a sealing surface with the inner wall of the body 91 of the protective layer 9, the two annular sheets 92 play a role of sealing gaskets when the butterfly valve is installed, and the installation efficiency is also improved.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims

1. The utility model provides a butterfly valve, includes valve body (1), dish board (2) and valve rod (3), its characterized in that: the valve body (1) comprises an upper valve body (11) and a lower valve body (12), the upper valve body and the lower valve body are fixed through bolts and form a channel, the disc plate (2) is positioned in the channel, through grooves (4) are formed in the opposite surfaces of the upper valve body (11) and the lower valve body (12), annular grooves (41) are formed by the two through grooves (4) when the upper valve body and the lower valve body are connected, a through hole (5) for the valve rod (3) to penetrate through is formed in the upper valve body (11), one end, close to the through groove, of the through hole (5) is provided with a first groove (51) with the diameter larger than that of the through hole (5), and the other end of the through hole is provided with a second groove; a third groove (61) is formed in the lower valve body (12), a fourth groove (62) is formed in the bottom of the third groove (61), the third groove (61) and the fourth groove (62) form a step groove (6), and the center of the fourth groove (62) and the center of the through hole (5) are on the same axis; the symmetry is equipped with seal assembly (7) in three (61) and the recess (51) of recess, seal assembly (7) are including lamination group (71), gasket (72) and seal gasket (73) that set gradually, the cladding of dish board coating (8) is on the surface of dish board (2), inoxidizing coating (9) include body (91) and be located annular piece (92) that body (91) both sides and symmetry set up, be equipped with in body (91) the periphery with lead to groove (4) annular protruding (93) of usefulness.

2. A butterfly valve in accordance with claim 1, wherein: ears (01) of holes to be used are arranged on the upper valve body and the lower valve body.

3. A butterfly valve in accordance with claim 1, wherein: the gasket (72) is made of stainless steel.

4. A butterfly valve in accordance with claim 1, wherein: an O-shaped ring (74) is embedded on the sealing gasket (73), the O-shaped ring (74) is abutted against the valve rod (3), and a sealing ring-shaped ring (81) is embedded on the disc plate coating layer (8).

5. A butterfly valve in accordance with claim 1, wherein: valve rod (3) is connected to dish board (2) one end, and the other end is connected with spindle nose (10), and the one end that dish board (2) were kept away from in spindle nose (10) is worn to establish and is located sealing assembly (7) in recess three (61) and arrange in recess four (62).

6. A butterfly valve in accordance with claim 1, wherein: the lamination stack (71) consists of a centrally recessed annular metal sheet.