Zero-leakage self-compensating bidirectional metal seal ball valve

Abstract

The utility model discloses a kind of zero-leakage self-compensation bidirectional metal sealing ball valve, it is related to the technical field of ball valve, including valve body assembly, two groups of connecting components, two groups of compensation components and driving assembly, two groups of the compensation components are respectively arranged in the left and right ends of valve body assembly, the one end of compensation component away from valve body assembly is equipped with connecting component, the upper end of valve body assembly is equipped with driving assembly, by the spring in compensation component provides sustained elastic force, when ball valve body is contacted with valve body shell due to long time rotation and thus generates gap or generates deformation due to sealing component thermal expansion and contraction or pressure fluctuation, spring will push cylindrical block to move to ball valve body, to drive push plate and sealing gasket one to move to ball valve body and to sealing gasket one certain pressure is applied, so that sealing gasket one is always closely attached to ball valve body, to effectively fill gap, prevent medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to a zero-leakage self-compensating bidirectional metal-sealed ball valve. Background Technology

[0002] A ball valve is a type of valve used to cut off or connect the flow of media in a pipeline. It belongs to the category of automatic valves. It uses a ball as the opening and closing element. The ball rotates around the center line of the valve body to achieve the functions of opening, closing, and regulating. Among them, the automatic compensating sealing ball valve uses a ball valve to control the flow of fluid. This ball valve has an automatic compensating sealing function, which can automatically adjust the sealing performance of the valve to ensure that the fluid does not leak in the pipeline.

[0003] When the ball valve body is rotated for a long time, frequent contact occurs between the ball valve body and the valve body shell, which causes wear and gaps on the surface of the ball valve body. This prevents the ball valve body from sealing completely, which may lead to media leakage. Furthermore, if the pressure, temperature and other conditions in the pipeline change, the sealing components may deform due to thermal expansion and contraction or pressure fluctuations, which will also affect the sealing effect. To address these issues, a zero-leakage self-compensating bidirectional metal-sealed ball valve is proposed. Utility Model Content

[0004] To solve the above-mentioned technical problems, a zero-leakage self-compensating bidirectional metal-sealed ball valve is provided. This technical solution solves the problem mentioned in the background art that when the ball valve body is rotated for a long time, frequent contact occurs between the ball valve body and the valve body shell, which causes wear and gaps on the surface of the ball valve body, resulting in the ball valve body not being able to seal completely, which may lead to media leakage. Furthermore, if the pressure, temperature and other conditions in the pipeline change, the sealing components will deform due to thermal expansion and contraction or pressure fluctuations, which will also affect the sealing effect.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A zero-leakage self-compensating bidirectional metal-sealed ball valve includes a valve body assembly, two sets of connecting assemblies, two sets of compensation assemblies, and a drive assembly. The two sets of compensation assemblies are respectively disposed at the left and right ends of the valve body assembly. A connecting assembly is provided at the end of each compensation assembly away from the valve body assembly. A drive assembly is provided at the upper end of the valve body assembly. The compensation component includes a fixed ring with an annular groove on its inner side. A push plate is located inside the annular groove, and a connecting pipe is fixedly connected to the outer side of the push plate. Four circular grooves are equidistantly arranged on the inner side of the fixed ring. Sliding grooves are symmetrically arranged on the outer surface of the circular grooves. A spring is installed inside the circular groove, and a cylindrical block is fixedly connected to one end of the spring. The cylindrical block slides inside the circular groove. A slider is symmetrically connected to the outer surface of the cylindrical block and slides inside the sliding groove. The inner side of the cylindrical block is fixedly connected to the outer side of the push plate. A sealing gasket is installed on the outer side of the fixed ring.

[0006] Preferably, the valve body assembly includes a valve body housing, and a ball valve body is provided inside the valve body housing. A limit groove is formed on the upper end of the outer surface of the ball valve body.

[0007] Preferably, a sealing gasket is provided inside the valve body shell and on both the left and right sides of the ball valve body. The outer side of the sealing gasket is fixedly connected to the inner side of the push plate. A threaded groove is provided through each of the four corners of the valve body shell.

[0008] Preferably, the connecting assembly includes a connecting housing, a connector is fixedly installed on the outer side of the connecting housing, and threaded grooves are provided at each of the four corners of the connecting housing.

[0009] Preferably, a second sealing gasket is installed on the inner side of the connecting housing, and the inner side of the second sealing gasket is grounded to the outer side of the third sealing gasket.

[0010] Preferably, the drive assembly includes a drive connector, which is rotatably mounted inside the valve body housing. A rotary valve stem is mounted on the upper end of the drive connector, and a limit block is mounted on the lower end of the drive connector. The limit block is inserted into the limit groove.

[0011] Preferably, the internal threads of the first threaded groove and the second threaded groove are connected to bolts, the bolts are threaded to nuts, and a fastening plate is provided between the nut and the connecting shell.

[0012] The advantages of this utility model compared with the prior art are: This invention provides continuous elastic force through the spring in the compensation component. When the ball valve body is in contact with the valve body shell due to long-term rotation, resulting in gaps, or when the sealing components are deformed due to thermal expansion and contraction or pressure fluctuations, the spring will push the cylindrical block to move towards the ball valve body. This will cause the push plate and the sealing gasket to move towards the ball valve body and apply a certain pressure to the sealing gasket, ensuring that the sealing gasket is always tightly fitted to the ball valve body. This effectively fills the gaps and prevents media leakage. Attached Figure Description

[0013] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the compensation component in this utility model; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a schematic diagram showing the disassembled structure of the compensation component in this utility model; Figure 5 This is a schematic diagram of the valve body assembly of this utility model; Figure 6 This is a schematic diagram of the structure of the drive component of this utility model; Figure 7 This is a schematic diagram of the connection component of this utility model.

[0014] The numbers on the map are: 100. Valve body assembly; 101. Valve body housing; 102. Ball valve body; 103. Limit groove; 104. Sealing gasket one; 105. Threaded groove one; 200. Connecting assembly; 201. Connecting housing; 202. Connector head; 203. Sealing gasket II; 204. Threaded groove II; 300. Compensation component; 301. Fixing ring; 302. Annular groove; 303. Push plate; 304. Connecting pipe; 305. Circular groove; 306. Slide groove; 307. Spring; 308. Cylindrical block; 309. Slider; 310. Sealing gasket three; 400. Drive assembly; 401. Drive connector; 402. Rotary valve stem; 403. Limit block; 500, Bolt; 600, Nut; 700, Fastening plate. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. This description is intended to disclose the present invention so that those skilled in the art can implement it. Furthermore, the embodiments described are merely examples, and the present invention can be implemented in other ways different from those described herein. Example 1

[0016] Reference Figures 1-7 As shown, a zero-leakage self-compensating bidirectional metal-sealed ball valve includes a valve body assembly 100, two sets of connecting assemblies 200, two sets of compensation assemblies 300, and a drive assembly 400. The valve body assembly 100 is characterized in that: the two sets of compensation assemblies 300 are respectively disposed at the left and right ends of the valve body assembly 100, the end of the compensation assembly 300 away from the valve body assembly 100 is provided with a connecting assembly 200, and the upper end of the valve body assembly 100 is provided with a drive assembly 400.

[0017] The compensation component 300 includes a fixing ring 301. An annular groove 302 is provided on the inner side of the fixing ring 301. A push plate 303 is provided inside the annular groove 302. A connecting pipe 304 is fixedly connected to the outer side of the push plate 303. The outer surface of the connecting pipe 304 abuts against the inner wall of the fixing ring 301 and can slide on its inner wall. When a gap occurs, under the elastic force of the spring 307, the push plate 303 will drive the sealing gasket 104 to move towards the ball valve body 102. At this time, the connecting pipe 304 will also move towards the ball valve body 102 under the drive of the push plate 303.

[0018] When the slider 309 abuts against the inner wall of the groove 306, the outer side of the connecting pipe 304 remains inside the fixing ring 301. Four circular grooves 305 are equidistantly spaced on the inner side of the fixing ring 301. Grooves 306 are symmetrically arranged on the outer surface of each circular groove 305. A spring 307 is installed inside each circular groove 305. The spring 307 can be made of chromium vanadium spring steel 307, which has high strength, high elastic limit, and good fatigue resistance, maintaining stable elastic force during long-term extension and contraction, thus providing reliable power. One end of the spring 307 is fixedly connected to a cylindrical block 308, which slides within the circular groove 305. Inside, sliders 309 are symmetrically connected to the outer surface of the cylindrical block 308. The sliders 309 slide inside the groove 306. The inner side of the cylindrical block 308 is fixedly connected to the outer side of the push plate 303. Under the push of the spring 307, the cylindrical block 308 slides along the circular groove 305 toward the ball valve body 102. To ensure the stability and accuracy of the movement of the cylindrical block 308, the sliders 309 symmetrically connected to its outer surface slide synchronously in the groove 306. The guiding effect of the groove 306 on the slider 309 makes the cylindrical block move only in a straight line in a specific direction, thereby transmitting the force of the spring 307 to the push plate 303. A sealing gasket 310 is installed on the outer side of the fixing ring 301. Example 2

[0019] Reference Figures 5-7 As shown, the valve body assembly 100 includes a valve body shell 101, inside which a ball valve body 102 is provided. A limiting groove 103 is formed on the upper end of the outer surface of the ball valve body 102. Sealing gaskets 104 are provided on the inside of the valve body shell 101 and on both the left and right sides of the ball valve body 102. The surface of the sealing gasket 104 that contacts the ball valve body 102 is set to be arc-shaped to match its outer surface, so that the ball valve body 102 and the sealing gasket 104 can be in close contact. The outer surface of the sealing gasket 104 abuts against the inner wall of the valve body shell 101. The outer side of the sealing gasket 104 is fixedly connected to the inner side of the push plate 303. Threaded grooves 105 are provided through the four corners of the valve body shell 101.

[0020] The connecting assembly 200 includes a connecting housing 201. A connector 202 is fixedly installed on the outer side of the connecting housing 201. The connector has a threaded structure inside for connecting to an external pipe. Threaded grooves 204 are provided at each of the four corners of the connecting housing 201. A sealing gasket 203 is installed on the inner side of the connecting housing 201. The inner side of the sealing gasket 203 is grounded to the outer side of the sealing gasket 310.

[0021] The drive assembly 400 includes a drive connector 401, which is rotatably mounted inside the valve body housing 101. A rotary valve stem 402 is mounted on the upper end of the drive connector 401, and a limit block 403 is mounted on the lower end of the drive connector 401. The limit block 403 is inserted into the limit groove 103. Bolts 500 are threadedly connected to the internal threads of threaded groove 105 and threaded groove 204. Nuts 600 are threadedly connected to the bolts 500. A fastening piece 700 is provided between the nut 600 and the connecting housing 201. The connecting housing 201 is connected to the valve body housing 101 by the bolts 500 passing through threaded groove 105 and threaded groove 204 and being fastened with the nut 600.

[0022] The usage process of this utility model: Specifically, the connecting housing 201 is connected to the outer sealing gasket 310 of the retaining ring 301 of the compensation assembly 300 via the sealing gasket 203. Then, the bolts 500 are passed through the threaded grooves 204 at the four corners of the connecting housing 201 and the threaded grooves 105 at the four corners of the valve body housing 101, and the nuts 600 are tightened on the bolts 500. At the same time, it is ensured that there is a fastening piece 700 between the nut 600 and the connecting housing 201, thereby completing the connection between the connecting assembly 200 and the valve body assembly 100. The connector 202 is used to connect to the external pipeline.

[0023] In use, rotating the rotary valve stem 402 drives the drive connector 401 to rotate. Since the limit block 403 is inserted into the limit groove 103, it can drive the ball valve body 102 to rotate. When the water passage inside the ball valve body 102 is connected to the pipeline, it is in the open state, and the medium can flow in the pipeline. Similarly, rotating the rotary valve stem 402 so that the water passage inside the ball valve body 102 is perpendicular to the direction of medium flow, it blocks the flow of medium and is in the closed state.

[0024] When the ball valve body 102 rotates inside the valve body housing 101 for a long time, the outer surface of the ball valve body 102 will come into contact with the inside of the valve body housing 101. The long-term rotation will cause wear to the outer surface of the ball valve body 102, or deformation due to thermal expansion and contraction or pressure fluctuations of the sealing components. In these cases, gaps will appear between the ball valve body 102 and the sealing gasket 104, causing the medium to flow out from the gaps. To prevent the medium from flowing out, when a gap appears between the ball valve body 102 and the sealing gasket 104, the spring 307 will automatically extend, thereby pushing the push plate 303 and applying a certain pressure to the sealing gasket 104, ensuring that the seal between the valve body housing 101 and the ball valve body 102 is not affected, thereby maintaining the sealing effect.

[0025] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A zero-leakage self-compensating bidirectional metal seal ball valve, comprising a valve body assembly (100), two sets of connecting assemblies (200), two sets of compensation assemblies (300) and a driving assembly (400), characterized in that: Two sets of compensation components (300) are respectively disposed at the left and right ends of the valve body assembly (100). A connecting component (200) is provided at the end of each compensation component (300) away from the valve body assembly (100). A driving component (400) is provided at the upper end of the valve body assembly (100). The compensation component (300) includes a fixing ring (301), an annular groove (302) is formed on the inner side of the fixing ring (301), a push plate (303) is provided inside the annular groove (302), a connecting pipe (304) is fixedly connected to the outer side of the push plate (303), four circular grooves (305) are equidistantly formed on the inner side of the fixing ring (301), and sliding grooves (306) are symmetrically formed on the outer surface of the circular grooves (305). The internal parts of the circular grooves (305) are fitted with... A spring (307) is installed, and a cylindrical block (308) is fixedly connected to one end of the spring (307). The cylindrical block (308) slides inside the circular groove (305). A slider (309) is symmetrically connected to the outer surface of the cylindrical block (308). The slider (309) slides inside the sliding groove (306). The inner side of the cylindrical block (308) is fixedly connected to the outer side of the push plate (303). A sealing gasket (310) is installed on the outer side of the fixing ring (301).

2. The zero-leakage self-compensating bidirectional metal-sealed ball valve according to claim 1, characterized in that: The valve body assembly (100) includes a valve body housing (101), and a ball valve body (102) is provided inside the valve body housing (101). A limit groove (103) is formed on the upper end of the outer surface of the ball valve body (102).

3. The zero-leakage self-compensating bidirectional metal-sealed ball valve according to claim 2, characterized in that: The valve body housing (101) is provided with sealing gaskets (104) on the inside and the left and right sides of the ball valve body (102). The outer side of the sealing gasket (104) is fixedly connected to the inner side of the push plate (303). Threaded grooves (105) are provided at the four corners of the valve body housing (101).

4. The zero-leakage self-compensating bidirectional metal-sealed ball valve according to claim 1, characterized in that: The connecting assembly (200) includes a connecting shell (201), on the outside of which a connector (202) is fixedly installed, and threaded grooves (204) are provided at each of the four corners of the connecting shell (201).

5. A zero-leakage self-compensating bidirectional metal-sealed ball valve according to claim 4, characterized in that: A second sealing gasket (203) is installed on the inner side of the connecting housing (201), and the inner side of the second sealing gasket (203) is in contact with the outer side of the third sealing gasket (310).

6. The zero-leakage self-compensating bidirectional metal-sealed ball valve according to claim 1, characterized in that: The drive assembly (400) includes a drive connector (401), which is rotatably mounted inside the valve body housing (101). A rotary valve stem (402) is mounted on the upper end of the drive connector (401), and a limit block (403) is mounted on the lower end of the drive connector (401). The limit block (403) is inserted into the limit groove (103).

7. A zero-leakage self-compensating bidirectional metal-sealed ball valve according to claim 3, characterized in that: The internal threads of the first threaded groove (105) and the second threaded groove (204) are connected to bolts (500), and nuts (600) are threaded onto the bolts (500). A fastening plate (700) is provided between the nut (600) and the connecting shell (201).

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