Ball valve body sealing structure

Abstract

The utility model discloses a ball valve body sealing structure, which relates to the technical field of ball valve bodies, and comprises valve body main bodies, ball bodies, a fixing pipe, a fixing disc and a connecting pipe, and the ball bodies are arranged in the two valve body main bodies. A medium passes through the interiors of the connecting pipe, the valve body main body and the pressurizing pipe groove, the medium is pressurized through the inner diameter of the pressurizing pipe groove, the pressurizing pipe groove and the rubber sealing sleeve disc are pushed by medium pressure to be attached to the outer wall of the sealing coating, and meanwhile a supporting spring, a supporting column and a limiting groove push the fixing disc and the rubber sealing sleeve disc to move; the rubber sealing sleeve disc is attached to the sealing coating on the outer wall of the ball body through the supporting spring, the rubber sealing sleeve disc is more tightly attached to the ball body and the outer wall of the sealing coating through the combined action of medium pressure and thrust of the supporting spring, the pressure resistance of the ball valve is enhanced, and meanwhile erosion and abrasion of media to the sealing face are reduced. Therefore, the service life of the ball valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valve bodies, in particular to a ball valve body sealing structure. Background Art

[0002] The valve body sealing structure of the ball valve is the key part to ensure that the ball valve can effectively prevent the leakage of the medium when it is closed. The internal seals of the ball valve are mainly elastic seals and metal seals. The elastic seals are made of rubber, polytetrafluoroethylene and other materials, and are suitable for media with solid particles and fewer particles or gas media; the metal seals are made of metal materials. Taking the fixed ball valve as an example, its sealing principle depends on the close fit between the valve seat sealing ring and the ball. According to the installation position of the valve seat sealing ring, it can be divided into two structures: front sealing of the ball and rear sealing of the ball. The sealing of the ball valve depends on the sealing ring, and the valve body and the ball are sealed by multiple sets of sealing rings.

[0003] During the use of the ball valve, the valve seat and the ball are fitted together to form a seal through multiple sets of sealing rings. The valve seat is mostly made of PVC, PP, copper and iron. When the medium passes through the sealing part, it will scour the valve seat. At the same time, the sealing surface will be worn, scour and cavitated during the flow of the medium, resulting in local damage. After long-term use, the original sealing performance between the ball and the valve body will gradually be lost due to erosion or wear of the medium. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the following technical problems in the prior art: the sealing performance between the ball and the valve body in the ball valve body sealing structure will gradually lose due to medium erosion or wear.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a ball valve body sealing structure, including a valve body main body, a ball, a fixed tube, a fixed disk and a connecting tube, two groups of the valve body main bodies are provided with balls inside, one group of the valve body main bodies is welded with a fixed tube on the top, two groups of the valve body main bodies are provided with fixed disks inside, one end of the two groups of valve body main bodies is connected to the connecting tube by bolts, two groups of the fixing disks are provided with rubber sealing sleeves at one end close to the ball, two groups of the fixing disks are provided with boosting pipe grooves extending to the inside of the rubber sealing sleeves inside, and the inner walls of the two groups of the valve body main bodies are provided with limiting grooves.

[0007] Preferably, the interior of the two groups of fixed disks are each provided with four groups of support columns extending into the interior of the limiting groove, one end of the eight groups of support columns are located inside the fixed disk and are each provided with a support spring, and the outer walls of the two groups of fixed disks are both provided with a second sealing ring.

[0008] Preferably, a first sealing ring is provided between the two groups of valve body main bodies.

[0009] Preferably, the outer wall of the sphere is coated with a sealing coating, a through groove is provided inside the sphere, and a connecting shaft extending to the outside of the top end of the valve body is welded to the top end of the sphere.

[0010] Preferably, the outer wall of the connecting shaft is located inside the valve body and is sleeved with a sealing ring, the outer wall of the top end of the connecting shaft is welded with a fixing block, and the outer wall of the fixing block is provided with four groups of slots.

[0011] Preferably, a limiting frame extending to the inside of a group of slots is provided inside the fixing tube, and a return spring is provided at the bottom end of the limiting frame inside the fixing tube.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. When the ball valve body sealing structure is in use, the medium passes through the connecting pipe, the valve body and the inside of the boost pipe groove. The inner diameter of the boost pipe groove pressurizes the medium. The medium pressure pushes the boost pipe groove and the rubber sealing sleeve to fit the outer wall of the sealing coating. At the same time, the supporting spring, the supporting column and the limit groove push the fixed disk and the rubber sealing sleeve to move, so that the rubber sealing sleeve fits the sealing coating on the outer wall of the ball. The combined action of the medium pressure and the thrust of the supporting spring makes the rubber sealing sleeve fit more closely to the outer wall of the ball and the sealing coating, thereby enhancing the pressure resistance of the ball valve and reducing the erosion and wear of the sealing surface by the medium, thereby extending the service life of the ball valve.

[0014] 2. When the sealing structure of the ball valve body needs to be limited, the connecting shaft, ball, sealing coating and through groove are rotated through the fixed block. After the ball is rotated to the required angle, the reset spring is used to reset and push one end of the limit frame into the slot. The limit frame and the reset spring limit the slot and the fixed block, so that the fixed block, connecting shaft and ball are fixed. By limiting the rotation angle of the ball, the close fit between the ball and the rubber sealing sleeve is ensured, thereby improving the sealing performance of the ball valve and preventing medium leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main view of the utility model;

[0016] Figure 2 This is a front cutaway view of the present invention;

[0017] Figure 3 This is an exploded view of the utility model;

[0018] Figure 4 It is a top view of the utility model.

[0019] In the figure: 1. Valve body; 101. First sealing ring; 2. sphere; 201. Sealing coating; 202. Through groove; 203. Connecting shaft; 204. Sealing ring; 205. Fixed block; 206. Slot; 3. Fixed pipe; 301. Limiting frame; 302. Return spring; 4. Fixed disk; 401. Rubber sealing sleeve disk; 402. Booster pipe groove; 403. Limiting groove; 404. Support column; 405. Support spring; 406. Second sealing ring; 5. Connecting pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The utility model provides a technical solution: a ball valve body sealing structure, including a valve body main body 1, a ball 2, a fixing tube 3, a fixing disk 4 and a connecting tube 5, two groups of valve body main bodies 1 are provided with a ball 2, a fixing tube 3 is welded to the top of one group of valve body main bodies 1, and a fixing disk 4 is provided inside the two groups of valve body main bodies 1. One end of the two groups of valve body main bodies 1 is connected to the connecting tube 5 by bolts, and the ends of the two groups of fixing disks 4 close to the ball 2 are provided with a rubber sealing sleeve 401, and the interior of the two groups of fixing disks 4 is provided with a boosting pipe groove 402 extending to the interior of the rubber sealing sleeve 401, and the inner walls of the two groups of valve body main bodies 1 are provided with a limiting groove 403.

[0022] See Figure 2 and Figure 3 It can be seen that the interior of the two groups of fixed disks 4 are each provided with four groups of support columns 404 extending into the interior of the limit groove 403, one end of the eight groups of support columns 404 are located inside the fixed disk 4 and are each provided with a support spring 405, the outer walls of the two groups of fixed disks 4 are both provided with a second sealing ring 406, and the inner diameter of the two groups of boost pipe grooves 402 gradually becomes smaller.

[0023] In specific implementation, when the ball valve body sealing structure needs to be used, the medium flows through a group of connecting pipes 5 to the interior of a group of valve body main bodies 1, and the medium enters the interior of the boosting pipe groove 402. The medium impacts the boosting pipe groove 402, and the inner diameter of the boosting pipe groove 402 gradually becomes smaller, so that the medium pressure inside the boosting pipe groove 402 increases, and the medium pressure pushes the boosting pipe groove 402 and the rubber sealing sleeve 401 to fit the outer wall of the sealing coating 201. At the same time, the support spring 405 resets and pushes the support column 404 to contact the limit groove 403. The support spring 405 pushes the fixed plate 4 and the rubber sealing sleeve 401 to move, so that the rubber sealing sleeve 401 fits the sealing coating 201 on the outer wall of the ball 2. Through the combined action of the medium pressure and the thrust of the support spring 405, the rubber sealing sleeve 401 fits more closely with the outer wall of the ball 2 and the sealing coating 201, thereby enhancing the pressure resistance of the ball valve and reducing the erosion and wear of the sealing surface by the medium, thereby extending the service life of the ball valve.

[0024] See Figure 2 and Figure 3 It can be seen that a first sealing ring 101 is provided between the two groups of valve body main bodies 1, and the other ends of the two groups of valve body main bodies 1 are connected by bolts.

[0025] During specific implementation, the two groups of valve bodies 1 are sealed by the first sealing ring 101 .

[0026] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 It can be seen that the outer wall of the sphere 2 is coated with a sealing coating 201, a through groove 202 is opened inside the sphere 2, and a connecting shaft 203 extending to the outside of the top of the valve body 1 is welded to the top of the sphere 2. The outer wall of the connecting shaft 203 is located inside the valve body 1 and is sleeved with a sealing ring 204. The outer wall of the top of the connecting shaft 203 is welded with a fixing block 205, and the outer wall of the fixing block 205 is opened with four sets of slots 206.

[0027] In a specific implementation, the sealing coating 201 coated on the outer wall of the sphere 2 can improve the sealing effect between the sphere 2 and the rubber sealing sleeve 401.

[0028] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4 It can be seen that a limit frame 301 extending into a set of slots 206 is provided inside the fixed tube 3, and a return spring 302 is provided at the bottom end of the limit frame 301 inside the fixed tube 3, and the outer wall of the limit frame 301 is slidably connected to the inner wall of the fixed tube 3.

[0029] In specific implementation, when it is necessary to limit the sealing structure of the ball valve body, the operator pushes the limit frame 301 downward, and the limit frame 301 descends to push the return spring 302 to compress and deform, so that the limit frame 301 cannot limit the slot 206, and the connecting shaft 203, the ball 2, the sealing coating 201 and the through slot 202 are rotated through the fixing block 205. After the ball 2 is rotated to the required angle, the limit frame 301 is released, and the return spring 302 loses its limit and resets, and the ball 2 is reset. The positioning spring 302 resets and pushes the limit frame 301 to rise, and the limit frame 301 rises and enters the slot 206 at the top of the limit frame 301. The slot 206 and the fixed block 205 are limited by the limit frame 301 and the reset spring 302, so that the fixed block 205, the connecting shaft 203 and the ball 2 are fixed. By limiting the rotation angle of the ball 2, the close fit between the ball 2 and the rubber sealing sleeve 401 is ensured, thereby improving the sealing performance of the ball valve and preventing medium leakage.

[0030] To sum up: when the ball valve body sealing structure is needed, the medium flows to the interior of a group of valve body main bodies 1 through a group of connecting pipes 5, and the medium enters the interior of the boosting pipe groove 402. The medium impacts the boosting pipe groove 402, and the inner diameter of the boosting pipe groove 402 gradually becomes smaller, so that the medium pressure inside the boosting pipe groove 402 increases. The medium pressure pushes the boosting pipe groove 402 and the rubber sealing sleeve 401 to fit the outer wall of the sealing coating 201. The medium enters the interior of another group of boosting pipe grooves 402 through the through groove 202, and the medium is discharged through another group of connecting pipes 5.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ball valve body sealing structure, comprising a valve body (1), a ball (2), a fixed tube (3), a fixed disk (4) and a connecting tube (5), characterized in that: A sphere (2) is provided inside the two groups of valve body main bodies (1), a fixing tube (3) is welded to the top of one group of valve body main bodies (1), a fixing disk (4) is provided inside the two groups of valve body main bodies (1), one end of the two groups of valve body main bodies (1) is connected to a connecting tube (5) by bolts, a rubber sealing sleeve (401) is provided at one end of the two groups of fixing disks (4) close to the sphere (2), a boosting pipe groove (402) extending to the inside of the rubber sealing sleeve (401) is provided inside the two groups of fixing disks (4), and a limiting groove (403) is provided on the inner wall of the two groups of valve body main bodies (1).

2. A ball valve body sealing structure according to claim 1, characterized in that: Four groups of support columns (404) extending into the interior of the limiting groove (403) are provided inside the two groups of fixed disks (4); one end of each of the eight groups of support columns (404) located inside the fixed disk (4) is provided with a support spring (405); and the outer walls of the two groups of fixed disks (4) are sleeved with a second sealing ring (406).

3. The ball valve body sealing structure according to claim 1, characterized in that: A first sealing ring (101) is provided between the two groups of valve body main bodies (1).

4. A ball valve body sealing structure according to claim 1, characterized in that: The outer wall of the sphere (2) is coated with a sealing coating (201), a through groove (202) is provided inside the sphere (2), and a connecting shaft (203) extending to the outside of the top end of the valve body (1) is welded to the top end of the sphere (2).

5. The ball valve body sealing structure according to claim 4, characterized in that: The outer wall of the connecting shaft (203) is located inside the valve body (1) and is sleeved with a sealing ring (204). A fixing block (205) is welded to the outer wall of the top end of the connecting shaft (203). The outer wall of the fixing block (205) is provided with four groups of slots (206).

6. A ball valve body sealing structure according to claim 5, characterized in that: The interior of the fixed tube (3) is provided with a limiting frame (301) extending into a group of slots (206), and the interior of the fixed tube (3) is provided with a return spring (302) at the bottom end of the limiting frame (301).

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