CN209909183U - Metal hard seal butterfly valve - Google Patents

Abstract

The utility model discloses a metal hard-sealed butterfly valve, which comprises a valve body and a butterfly plate. The valve body is a spherical structure with a hollow interior and open ends at both ends. A rotatable butterfly plate is fitted inside the valve body. The plate includes a circular intermediate partition plate, the circumferential surface of the intermediate partition plate is provided with spherical shaped spherical plates, the surfaces of the spherical plates on both sides of the intermediate partition plate are respectively provided with assembly through grooves, and the assembly through grooves are slidably installed inside. A sealing plate with a U-shaped structure, the closed end of the sealing plate is installed in contact with the inner wall of the valve body, a shaft hole is arranged inside the middle partition plate along the radial direction, and a driving mechanism is installed inside the shaft hole, and the metal hard seal The butterfly valve adopts a sealing plate with compensation function inside the butterfly plate. When friction loss occurs, it can automatically compensate to ensure the sealing degree of the sealing pair.

Description

A metal hard sealing butterfly valve

technical field

The utility model relates to the technical field of valves, in particular to a metal hard sealing butterfly valve.

Background technique

As a common valve equipment, butterfly valves are widely used in industrial and living equipment. Existing butterfly valves are generally divided into two types: soft seals and hard seals. The sealing pair of soft seals adopts non-metal soft materials to metal hard In the process of use, the non-metallic soft material is in contact with the internal circulating medium for a long time, resulting in material aging, and there are problems such as wear during the opening and closing of the valve, which has a great effect on the sealing degree of the sealing pair. The sealing pair of the hard seal is matched with hard metal materials and hard metal materials. When the hard metal materials cooperate with each other, in order to ensure the sealing degree, a large adhesion force needs to be used. Therefore, during the valve opening and closing process, there are Large friction loss, but the existing hard sealing butterfly valve does not have the ability to automatically compensate, when friction loss occurs, the sealing degree of the valve will drop sharply.

Utility model content

The technical problem to be solved by the utility model is to overcome the existing defects and provide a metal hard sealing butterfly valve, which adopts a sealing plate with a compensation function inside the butterfly plate. When friction loss occurs, compensation can be automatically performed to ensure the sealing pair. It can effectively solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a metal hard-sealed butterfly valve, comprising a valve body and a butterfly plate, the valve body is a spherical structure with a hollow interior and openings at both ends, and the interior of the valve body can be matched and installed. The rotating butterfly plate, the butterfly plate includes a circular intermediate partition plate, the circumferential surface of the intermediate partition plate is provided with spherical spherical plates, and the surfaces of the spherical plates on both sides of the intermediate partition plate are respectively provided with assembly through grooves, A sealing plate with a U-shaped structure is slidably installed inside the assembly through groove, the closed end of the sealing plate is installed in contact with the inner wall of the valve body, and a shaft hole is arranged inside the middle partition plate along the radial direction, and the shaft hole is matched inside the shaft hole. Install the drive mechanism.

As a preferred technical solution of the present invention, both ends of the butterfly plate along the length direction of the rotation axis are plane structures, the internal space structure of the valve body is consistent with the butterfly plate, and the two plane end parts of the spherical plate are A chute is provided, and extension plates are respectively provided at both ends of the sealing plate. The extension board is slidably installed inside the chute, a limit groove is arranged inside the chute, and a limit block is arranged under the extension board. The position block is slidably installed inside the limit slot, and through the structural design of the limit slot and the limit block, the compensation displacement length of the sealing plate is limited to avoid the separation of the sealing plate and the spherical plate.

As a preferred technical solution of the present invention, the assembly through groove is a stepped groove connected on both sides, and the size of the inner opening of the assembly through groove is larger than the size of the outer opening, and limit plates are vertically arranged on both sides of the sealing plate, respectively. An elastic sealing body is arranged between the limiting plate and the stepped surface of the stepped groove, and the sealing ability between the sealing plate and the spherical plate is increased by arranging the elastic sealing body.

As a preferred technical solution of the present invention, the driving mechanism includes a central shaft, the central shaft is fitted with the shaft hole of the butterfly plate through a flat key, and the end of the central shaft is fitted with a worm gear, and the outer portion of the worm gear is fitted with a worm gear. The worm is meshed and installed, the two ends of the worm are rotated and installed with the valve body through the bearing pair, and the input shaft of the worm is connected with the external power input device, and the power is transmitted through the worm gear. Ensure the stability of the internal butterfly plate, and prevent the internal circulation medium from driving the butterfly plate to open or close in reverse.

Compared with the prior art, the beneficial effect of the present utility model is that the metal hard sealing butterfly valve adopts a sealing plate inside the butterfly plate, and the sealing plate is slidably installed inside the assembly through groove, and the opening inside the assembly through groove is directly connected to the pipeline. , the internal pressure of the pipeline directly acts on the inner surface of the sealing plate, pushing the sealing plate to move outward, so that the sealing plate and the inner wall of the valve are closely fitted to ensure the sealing performance. When friction loss occurs, the sealing plate can also be under the action of pressure. The inner wall of the valve body is closely fitted to ensure the tightness of the sealing pair, thereby prolonging the service life of the valve.

Description of drawings

Fig. 1 is the structural representation of the utility model;

2 is a schematic diagram of the assembly of the butterfly plate and the drive mechanism of the present invention;

Fig. 3 is the utility model butterfly plate structure schematic diagram;

4 is a schematic diagram of the sealing plate of the utility model;

Fig. 5 is the front view of the utility model;

Fig. 6 is the sectional view of the utility model A;

Fig. 7 is the sectional view of the utility model B;

Fig. 8 is the enlarged view of C of the utility model.

In the picture: 1 valve body, 2 butterfly plate, 201 middle spacer plate, 202 sealing plate, 203 assembly channel, 204 spherical plate, 205 elastic sealing body, 3 driving mechanism, 301 worm, 302 central shaft.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-8, the present utility model provides a technical solution: a metal hard-sealed butterfly valve, comprising a valve body 1 and a butterfly plate 2, the valve body 1 is a spherical structure with a hollow interior and openings at both ends, and the interior of the valve body 1 The butterfly plate 2 that can be rotated is installed together with the butterfly plate 2. The butterfly plate 2 includes a circular intermediate partition plate 201. The circumferential surface of the intermediate partition plate 201 is provided with spherical spherical plates 204. The surfaces of the spherical plates 204 on both sides of the intermediate partition plate 201 are respectively set Assembling the through groove 203, the sealing plate 202 of the U-shaped structure is slidably installed inside the assembly through groove 203, the closed end of the sealing plate 202 is installed in contact with the inner wall of the valve body 1, the middle partition plate 201 is provided with a shaft hole along the radial direction, and the shaft hole The drive mechanism 3 is installed internally.

Both ends of the butterfly plate 2 along the length direction of the rotation axis are plane structures. The internal space structure of the valve body 1 is the same as that of the butterfly plate 2. The two plane ends of the spherical plate 204 are provided with sliding grooves, and the two ends of the sealing plate 202 are respectively provided with extended extensions. The board, the extension board is slidably installed inside the chute, the limit slot is set inside the chute, the limit block is set under the extension board, and the limit block is slidably installed inside the limit slot, through the structural design of the limit slot and the limit block, The compensation displacement length of the sealing plate 202 is limited to prevent the sealing plate 202 from being separated from the spherical plate 204 .

The assembly through groove 203 is a stepped groove connected on both sides, and the size of the inner opening of the assembly through groove 203 is larger than that of the outer opening. Limiting plates are vertically arranged on both sides of the sealing plate 202 respectively, and between the limiting plate and the stepped surface of the stepped groove The elastic sealing body 205 is provided with the elastic sealing body 205 to increase the sealing ability between the sealing plate 202 and the spherical plate 204 .

The drive mechanism 3 includes a central shaft 302, the central shaft 302 is fitted with the shaft hole of the butterfly plate 2 through a flat key, the end of the central shaft 302 is fitted with a worm gear, and the worm gear is externally engaged to install a worm 301, and both ends of the worm 301 are connected to the valve through a bearing pair. The body 1 is rotated and installed, and the input shaft of the worm 301 is connected to the external power input device, and the power is transmitted through the worm gear and worm, and the reverse self-locking ability of the worm gear and worm is used to effectively ensure the stability of the internal butterfly plate 2 and avoid internal circulation. The medium reversely drives the butterfly plate 2 to open or close.

In use: connect the butterfly valve in series inside the pipeline. When the butterfly valve is in the closed state, the medium at the high pressure side will exert pressure on the inner wall of the intermediate partition plate 201 and the spherical plate 204, and simultaneously act on the inner wall of the sealing plate 202 to push the sealing plate. 202 moves to the outside and closely fits with the inner wall of the valve body 1 to ensure the tightness.

When the valve is opened, it is driven by rotating the worm 301, and driven by the worm and worm gear to drive the central shaft 302 and the butterfly plate 2 to rotate together, so that the interior of the valve body 1 is communicated.

The utility model adopts a sealing plate 202 inside the butterfly plate 2, and the sealing plate 202 is slidably installed inside the assembly through groove 203, the opening inside the assembly through groove 203 is directly connected to the pipeline, and the internal pressure of the pipeline directly acts on the inside of the sealing plate 202. surface, push the sealing plate 202 to move outward, so that the sealing plate 202 closely fits with the inner wall of the valve body 1 to ensure the sealing performance. When friction loss occurs, the sealing plate 202 can also closely fit with the inner wall of the valve body 1 under pressure. , to ensure the tightness of the sealing pair, thereby extending the service life of the valve.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. A metal hard-sealed butterfly valve, comprising a valve body (1) and a butterfly plate (2), characterized in that: the valve body (1) is a spherical structure with a hollow interior and openings at both ends, and the valve body (1) ) internally fitted with a rotatable butterfly plate (2), the butterfly plate (2) includes a circular intermediate partition plate (201), and a spherical shape spherical plate (204) is provided on the circumferential surface of the intermediate partition plate (201). ), the surfaces of the spherical plates (204) on both sides of the middle partition plate (201) are respectively provided with assembly through grooves (203), and the U-shaped structure sealing plate (202) is slidably installed inside the assembly through groove (203), The closed end of the sealing plate (202) is installed in contact with the inner wall of the valve body (1), the middle partition plate (201) is provided with a shaft hole in the radial direction, and the shaft hole is fitted with a drive mechanism (3) inside. . 2. The metal hard-sealed butterfly valve according to claim 1, characterized in that: both ends of the butterfly plate (2) along the length direction of the rotation axis are plane structures, and the internal space structure of the valve body (1) is closely related to the butterfly plate (2). The plates (2) are consistent, the two plane end portions of the spherical plate (204) are provided with chute, the two ends of the sealing plate (202) are respectively provided with extension plates, and the extension plates are slidably installed inside the chute, so A limit slot is arranged inside the chute, a limit block is arranged under the extension plate, and the limit block is slidably installed inside the limit slot. 3. The metal hard sealing butterfly valve according to claim 1, characterized in that: the assembly through groove (203) is a stepped groove connected on both sides, and the inner opening size of the assembly through groove (203) is larger than the outer opening size, so Limiting plates are respectively arranged vertically on both sides of the sealing plate (202), and an elastic sealing body (205) is arranged between the limiting plate and the stepped surface of the stepped groove. 4. The metal hard sealing butterfly valve according to any one of claims 1-3, characterized in that: the driving mechanism (3) comprises a central shaft (302), and the central shaft (302) is connected to the butterfly valve through a flat key. The shaft hole of the plate (2) is fitted with the shaft hole, the end of the central shaft (302) is fitted with a worm gear, the worm gear is externally engaged with a worm (301), and both ends of the worm (301) are connected to the valve body (301) through a bearing pair. 1) Rotate and install, and the input shaft of the worm (301) is connected to the external power input device.

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