CN204985763U - Spacing flexible butterfly valve - Google Patents

Abstract

The utility model provides a position-limiting telescopic butterfly valve, which includes a butterfly valve body, a telescopic tube installed on the butterfly valve body, a sealing ring and a pressure plate sleeved on the outside of the telescopic tube, a sealing groove is arranged inside the pressure plate, and the sealing ring is located in the sealing groove. Inside, the pressure plate and the butterfly valve body are locked and fixed by screws, and a flange is protruded from the outside of the telescopic tube, and the flange and the butterfly valve body are located at opposite ends of the telescopic tube. The lug is integrally formed with the telescopic tube, and the lug is located between the pressure plate and the flange. The limit telescopic butterfly valve also includes a limit screw connecting the lug with the butterfly valve body and a number of limit screws matched with the limit screw. The position nut can prevent the telescopic tube from pulling off and ensure the safe operation of the pipeline; the telescopic tube and the lug are integrally formed, the structure is simple, no additional installation is required, and the cost is saved; and the overall mass of the telescopic tube is small, which is conducive to the work of the limit telescopic butterfly valve.

Description

A limit telescopic butterfly valve

technical field

The utility model relates to a valve, in particular to a position-limiting telescopic butterfly valve.

Background technique

Butterfly valve is a commonly used valve. The opening and closing part is a butterfly plate. The butterfly plate and the valve shaft rotate to achieve the purpose of opening and closing. The telescopic butterfly valve not only has the function of a butterfly valve, but also has a certain amount of expansion and contraction in the pipeline. , which can facilitate installation and compensate for the thermal expansion and contraction of the pipeline, preventing the pipeline from being broken. At present, ordinary telescopic butterfly valves are designed in this way. As shown in Figure 1, the pressure plate 4' is sleeved on the telescopic tube 2', the sealing ring 3' is placed in the groove of the pressure plate 4', and the pressure plate 4 is fixed with the screw 5'. 'Connect with the valve body 1' and press the pressure plate 4'. However, when the pipeline expands with heat and contracts with cold, the telescopic pipe 2' will also be deformed, and it is likely that the telescopic pipe will break away from the valve body during work, making the telescopic butterfly valve invalid and affecting the operation safety of the pipeline.

In view of this, it is necessary to design a limit telescopic butterfly valve to solve the above problems.

Utility model content

The technical problem to be solved by the utility model is to provide a position-limiting telescopic butterfly valve with simple structure, low mass and preventing the telescopic tube from being pulled off.

In order to achieve the above purpose, the utility model provides the following technical solutions: a position-limiting telescopic butterfly valve, including a butterfly valve body, a telescopic tube installed on the butterfly valve body, and a sealing ring and a pressure plate sleeved on the outside of the telescopic tube. There is a sealing groove, the sealing ring is located in the sealing groove, the pressure plate and the butterfly valve body are locked and fixed by screws, the outer side of the telescopic tube is protruded with a flange, and the flange and the butterfly valve body are located at two opposite ends of the telescopic tube. The outer side of the telescopic tube is also provided with lugs integrally formed with the telescopic tube, the lugs are located between the pressure plate and the flange, and the limit-limiting telescopic butterfly valve also includes a limit screw rod and some limit nuts matched with the limit screw rod.

Further, the outer side of the butterfly valve body is protruded with a valve body flange, the limit screw is connected to the valve body flange and the lug, the limit nut is arranged on both sides of the lug, and the limit nut It is also arranged on the side of the flange of the valve body and away from the lug.

Further, the flange of the valve body moves back and forth relative to the limit screw.

Compared with the prior art, the utility model has at least the following advantages: it can prevent the telescopic tube from being pulled off and ensure the safe operation of the pipeline; Small size is beneficial to the work of limit telescopic butterfly valve.

Description of drawings

Fig. 1 is a structural schematic diagram of a telescopic butterfly valve in the prior art.

Fig. 2 is a structural schematic diagram of the limit telescopic butterfly valve of the present invention.

FIG. 3 is a partially enlarged view of part A shown in FIG. 2 .

detailed description

The structure and content of the utility model of the limit telescopic butterfly valve of the utility model will be described below in conjunction with FIG. 2 .

A position-limiting telescopic butterfly valve, comprising a butterfly valve body 1, a telescopic tube 2 installed on the butterfly valve body 1, a sealing ring 3 and a pressure plate 4 sleeved on the outside of the telescopic tube 2, and screws for locking and fixing the pressure plate 4 to the butterfly valve body 1 5.

The butterfly valve body 1 is provided with a receiving chamber for the telescopic tube 2 to be installed. A valve body flange 6 connected with the telescopic tube 2 protrudes from the outside of the butterfly valve body 1 .

A flange 7 for connecting pipes protrudes from the outside of the telescopic pipe 2 . The flange 7 and the butterfly valve body 1 are located at opposite ends of the telescopic tube 2 . The outer side of the telescopic tube 2 is also provided with a lug 8 integrally formed with the telescopic tube 2 . The lug 8 is located between the pressure plate 4 and the flange 7 .

The pressure plate 4 is provided with a sealing groove 9 inside. The sealing ring 3 is located in the sealing groove 9 .

The limit telescopic butterfly valve also includes a limit screw 10 connecting the lug 8 with the butterfly valve body 1 and several limit nuts 11 matched with the limit screw 10 . The limiting screw 10 is connected to the valve body flange 6 and the lug 8 . The limit nuts 11 are arranged on both sides of the lug 8 . The limit nut 11 is also arranged on the side of the valve body flange 6 away from the lug 8 . The valve body flange 6 moves back and forth relative to the limit screw 10 .

The limit telescopic butterfly valve of the utility model is simple and quick to adjust the telescopic amount of the telescopic pipe, and effectively prevents the telescopic pipe from detaching from the butterfly valve body, thereby ensuring the safe operation of the pipeline. The integrally formed lugs on the telescopic tube are used to limit the position, so the structure is simple, no additional installation is required, there are few parts, and the overall mass is small, which is beneficial to the application of the telescopic butterfly valve.

In summary, the above are only preferred embodiments of the present invention, and should not limit the scope of the present invention. That is to say, all simple equivalent changes and modifications made according to the claims of the utility model and the content of the description should still fall within the scope covered by the utility model patent.

Claims (3)

1. a limit telescopic butterfly valve, comprise butterfly type valve, be arranged on the telescopic pipe on butterfly type valve and the seal ring be set in outside telescopic pipe and pressing plate, described pressing plate inside is provided with seal groove, seal ring is positioned at seal groove, described pressing plate and butterfly type valve are fixed by screw lock, flange plate is convexly equipped with outside described telescopic pipe, described flange plate and butterfly type valve are positioned at the relative two ends of telescopic pipe, it is characterized in that: outside described telescopic pipe, be also provided with the integrated lug with telescopic pipe, described lug is between pressing plate and flange plate, described limit telescopic butterfly valve also comprises the Limit screw be connected with butterfly type valve by lug and the some stop nuts coordinated with Limit screw.

2. limit telescopic butterfly valve as claimed in claim 1, it is characterized in that: outside described butterfly type valve, be convexly equipped with valve flange dish, described Limit screw connects valve body flange plate and lug, described stop nut is arranged on the both sides of lug, and described stop nut is also arranged on valve flange dish and deviates from the side of lug.

3. limit telescopic butterfly valve as claimed in claim 2, is characterized in that: described valve flange dish reciprocates relative to Limit screw.