Large-caliber heat supply all-welded hard sealing ball valve

Abstract

The utility model relates to a large-caliber heat supply all-welded hard sealing ball valve which comprises a valve body, a ball body is movably connected to an inner cavity of the valve body, a valve cover is fixedly connected to the top face of the valve body, a valve rod is fixedly connected to the middle of the top of the ball body, and the upper end of the valve rod is movably connected to the valve cover in a sleeved mode and penetrates out of the top of the valve cover. Through mutual cooperation of all the components, when the ball valve is closed, the first sealing block moves towards the first partition plate and is inserted into the first auxiliary channel, and when the ball body is closed, the first auxiliary channel is exactly blocked, so that a medium permeates into the main channel in time and is also blocked by the first partition plate, and therefore the sealing effect of the ball valve is improved; and when the ball body is closed, the second sealing block can be inserted into the second auxiliary channel to block the second auxiliary channel, so that the medium cannot penetrate through the second auxiliary channel to further seal the interior of the valve body, and the sealing effect of the ball valve after closing is further improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a large-diameter fully welded hard-seal ball valve for heating. Background Technology

[0002] With the acceleration of urbanization and the widespread adoption of centralized heating systems, the requirements for heating pipeline equipment are becoming increasingly stringent. Traditional valves often suffer from unstable sealing performance and leakage problems under harsh conditions such as high pressure, high temperature, and corrosive media, making it difficult to meet the needs of modern heating systems. Large-diameter, fully welded, hard-seal ball valves for heating have emerged to address this need. These valves employ a fully welded structure, welding the valve to the pipeline together, which not only enhances the overall strength and rigidity of the valve but also improves its pressure-bearing capacity.

[0003] When the ball valve is closed, the opening (i.e., the through hole) on the ball should be completely cut off from the flow path of the valve body to ensure that the medium cannot flow. Since the two ends of the ball opening and the two sides of the inner wall of the valve body need to be tightly fitted to form a seal when closed, this contact surface often becomes a potential leakage point. When the ball valve is closed, the tiny gap between the two ends of the ball opening and the inner wall of the valve body may allow a small amount of medium to seep in. This leakage may not only lead to the waste of medium, but may also cause pollution to the system, and even affect the stability and safety of the entire fluid system. Utility Model Content

[0004] The purpose of this utility model is to provide a large-diameter, fully welded, hard-seal ball valve for heating, in order to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is a large-diameter, fully welded, hard-seal ball valve for heating, comprising a valve body, a ball movably connected to the inner cavity of the valve body, a valve cover fixedly connected to the top surface of the valve body, a valve stem fixedly connected to the middle of the top of the ball, the upper end of the valve stem movably sleeved on the valve cover and extending to the outside of the top of the valve cover, a valve handle fixedly connected to the upper end face of the valve stem, a main channel opened in the middle of the ball, first partitions fixedly connected to the left and right sides of the inner wall of the main channel, a first secondary channel opened in the middle of the two first partitions, and two connecting sleeves fixedly sleeved between the two first partitions. The connecting sleeves are arranged in a downward and opposite manner. Each connecting sleeve has a movable cavity at its left and right ends. A first connecting rod is movably sleeved in each movable cavity. The two opposing ends of the first connecting rods extend to the outside of the left and right sides of the connecting sleeve. The two opposing ends of the first connecting rods located on the outside of the connecting sleeve are fixedly connected to a first connecting block. A first sealing block is fixedly connected to the side of the first connecting block near the first partition. A first sealing ring is fixedly sleeved on the surface of the first sealing block. The first sealing block cooperates with the first secondary channel and is arranged in a left-right and opposite manner. A push rod is fixedly connected to the middle of the side of the first connecting block away from the first partition.

[0006] In one embodiment, a movable block is fixedly connected to the end face of the first connecting rod located inside the movable cavity, and a first spring is fixedly connected to the side of the movable block away from the first connecting rod. One end of the first spring is fixedly connected to the side of the movable cavity away from the first connecting block.

[0007] In one embodiment, the two first connecting blocks are respectively disposed on opposite sides of the two first partitions, and the opposite ends of the two push rods respectively extend to the outside of the left and right sides of the sphere.

[0008] In one embodiment, the end faces of the two push rods on opposite sides are provided with movable grooves, and a ball is movably fitted in the movable grooves.

[0009] In one embodiment, a second partition is fixedly connected to both the left and right sides of the valve body cavity. A second secondary channel is opened in the middle of the second partition. A second connecting rod is movably sleeved on the top and bottom of each second partition. A second connecting block is fixedly connected to the end faces of the two opposite second connecting rods on the side away from the ball. A second sealing block is fixedly connected to the middle of the side of the second connecting block near the ball. The second sealing block cooperates with the second secondary channel and is arranged opposite to each other on the left and right. A second sealing ring is fixedly sleeved on the surface of the second sealing block.

[0010] In one embodiment, a fixing block is fixedly connected to the end faces of the two second connecting rods facing each other on the side near the sphere. The side of the fixing block near the sphere is in contact with the adjacent sphere. A second spring is sleeved on the side of each second connecting rod near the sphere. One end of the second spring is fixedly connected to the side of the second partition near the sphere, and the other end of the second spring is fixedly connected to the side of the fixing block away from the sphere.

[0011] In one embodiment, welding sleeves are fixedly connected to both the left and right ends of the valve body, and sealing gaskets are fixedly connected inside the welding sleeves.

[0012] The beneficial effects provided by this utility model are:

[0013] Through the cooperation of various components, when the ball valve is closed, the first sealing block moves towards the first partition and inserts into the first secondary channel. When the ball is closed, the first secondary channel is completely blocked, allowing the medium to seep into the main channel in time, which is also blocked by the first partition, thereby improving the sealing effect of the ball valve. When the ball is closed, the second sealing block inserts into the second secondary channel, blocking the second secondary channel and preventing the medium from passing through the second secondary channel, thus further sealing the inside of the valve body and further improving the sealing effect of the ball valve after it is closed. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is a main sectional view of the present invention;

[0016] Figure 3 This is a main cross-section of a sphere;

[0017] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0018] Figure 5 This is the main sectional view of the second partition.

[0019] In the attached diagram: 1. Valve body; 2. Ball; 3. Valve cover; 4. Valve stem; 5. Valve handle; 6. Main channel; 7. First partition; 8. First secondary channel; 9. Connecting sleeve; 10. Movable cavity; 11. First connecting rod; 12. First connecting block; 13. First sealing block; 14. First sealing ring; 15. Push rod; 16. Movable block; 17. First spring; 18. Movable groove; 19. Ball; 20. Second partition; 21. Second secondary channel; 22. Second connecting rod; 23. Second connecting block; 24. Second sealing block; 25. Second sealing ring; 26. Fixed block; 27. Second spring; 28. Welded sleeve; 29. ​​Sealing gasket. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0021] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] In one embodiment, such as Figure 1-5 As shown, a large-diameter, fully welded, hard-seal ball valve for heating includes a valve body 1, a ball 2 movably connected to the inner cavity of the valve body 1, a valve cover 3 fixedly connected to the top surface of the valve body 1, a valve stem 4 fixedly connected to the middle of the top of the ball 2, the upper end of the valve stem 4 movably sleeved on the valve cover 3 and extending to the outside of the top of the valve cover 3, a valve handle 5 fixedly connected to the upper end face of the valve stem 4, a main channel 6 opened in the middle of the ball 2, first partitions 7 fixedly connected to the left and right sides of the inner wall of the main channel 6, a first secondary channel 8 opened in the middle of the two first partitions 7, and a connecting sleeve 9 fixedly sleeved between the two first partitions 7, the number of connecting sleeves 9 being two and arranged vertically opposite each other, each connecting sleeve The inner cavity of the cylinder 9 has movable cavities 10 at both the left and right ends. Each movable cavity 10 is movably fitted with a first connecting rod 11. The two opposite ends of the first connecting rods 11 extend to the outside of the left and right sides of the connecting sleeve 9. The two opposite ends of the first connecting rods 11 located on the outside of the connecting sleeve 9 are fixedly connected to a first connecting block 12. A first sealing block 13 is fixedly connected to the side of the first connecting block 12 near the first partition 7. A first sealing ring 14 is fixedly fitted to the surface of the first sealing block 13. The first sealing block 13 cooperates with the first secondary channel 8 and is arranged opposite to the left and right. A push rod 15 is fixedly connected to the middle of the side of the first connecting block 12 away from the first partition 7.

[0023] In order for the first connecting rod 11 to move automatically outward when the ball valve is opened, so that the first sealing block 13 can be pulled out from the first secondary channel 8, a movable block 16 is fixedly connected to the end face of the first connecting rod 11 located inside the movable cavity 10. A first spring 17 is fixedly connected to the side of the movable block 16 away from the first connecting rod 11, and one end of the first spring 17 is fixedly connected to the side of the movable cavity 10 away from the first connecting block 12.

[0024] In order to enable the two first sealing blocks 13 to be inserted into the two first secondary channels 8 respectively when they move towards each other, or to be pulled out from the two first secondary channels 8 respectively when they move away from each other, the two first connecting blocks 12 are respectively set on the away side of the two first partition plates 7, and the away ends of the two push rods 15 respectively penetrate to the outside of the left and right sides of the ball 2.

[0025] In order to reduce the frictional resistance between the push rod 15 and the inner wall of the valve body 1, the end faces of the two push rods 15 on opposite sides are provided with movable grooves 18, and a ball 19 is movably sleeved in the movable grooves 18.

[0026] In order to further seal the inside of the valve body 1 and improve the sealing effect, a second partition 20 is fixedly connected to both the left and right sides of the inner cavity of the valve body 1. A second secondary channel 21 is opened in the middle of the second partition 20. A second connecting rod 22 is movably sleeved on the top and bottom of each second partition 20. A second connecting block 23 is fixedly connected to the end face of the two opposite second connecting rods 22 on the side away from the ball 2. A second sealing block 24 is fixedly connected to the middle of the side of the second connecting block 23 near the ball 2. The second sealing block 24 cooperates with the second secondary channel 21 and is arranged opposite to the left and right. A second sealing ring 25 is fixedly sleeved on the surface of the second sealing block 24.

[0027] In order to enable the second sealing block 24 to automatically move and insert into the second secondary channel 21 when the ball valve is closed, the end faces of the two opposite second connecting rods 22 near the ball 2 are fixedly connected to the fixing blocks 26. The side of the fixing blocks 26 near the ball 2 is in contact with the adjacent sphere 19. A second spring 27 is sleeved on the side of each second connecting rod 22 near the ball 2. One end of the second spring 27 is fixedly connected to the side of the second partition 20 near the ball 2, and the other end of the second spring 27 is fixedly connected to the side of the fixing block 26 away from the ball 2.

[0028] To facilitate welding of the valve body 1 and the pipeline, welding sleeves 28 are fixedly connected to both the left and right ends of the valve body 1. A sealing gasket 29 is fixedly connected inside the welding sleeve 28. The pipeline is inserted into the welding sleeve 28 and welded to fix it. The sealing gasket 29 improves the sealing performance of the pipeline welded to the welding sleeve 28.

[0029] Working principle: When closing the ball valve, first turn the valve handle 5 to rotate the valve stem 4. The valve stem 4 drives the ball 2 to rotate. After the ball 2 rotates, the side of the push rod 15 away from the first partition 7 will contact the inner wall surface of the valve body 1. As the ball 2 rotates more, the push rod 15 will be pushed, and the push rod 15 will drive the first connecting block 12 to move. The first connecting block 12 will drive the first sealing block 13 to move, so that the first sealing block 13 moves towards the first partition 7 and inserts into the first secondary channel 8. When the ball 2 is closed, the first secondary channel 8 is completely blocked, so that the medium can seep into the main channel 6 in time and will also be blocked by the first partition 7, thereby improving the sealing effect of the ball valve. When the ball 2 is open, the push rod 15 abuts against the second connecting block 23. At this time, the second spring 27 is in a compressed state. When the ball 2 is closed, the push rod 15 no longer abuts against the second connecting block 23, and the elasticity of the second spring 27 will push the solid... The fixed block 26 moves, which drives the second connecting rod 22 to move. The second connecting rod 22 drives the second connecting block 23 to move, and the second connecting block 23 drives the second sealing block 24 to move, so that the second sealing block 24 is inserted into the second secondary channel 21 and blocks the second secondary channel 21, preventing the medium from passing through the second secondary channel 21, thereby further sealing the inside of the valve body 1 and further improving the sealing effect after the ball valve is closed. When the ball valve is opened, the first spring 17 pushes the movable block 16, and the movable block 16 pushes the first connecting rod 11 outward, so that the first sealing block 13 can be pulled out from the first secondary channel 8, so that the medium can flow through the first secondary channel 8. The push rod 15 will abut against the second connecting block 23 and push the second connecting block 23, so that the second sealing block 24 can be pulled out from the second secondary channel 21, so that the medium can flow through the second secondary channel 21.

[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A large-diameter, fully welded, hard-seal ball valve for heating, characterized in that, The valve includes a valve body, a ball movably connected to the inner cavity of the valve body, a valve cover fixedly connected to the top surface of the valve body, a valve stem fixedly connected to the center of the top of the ball, the upper end of the valve stem movably sleeved on the valve cover and extending to the outside of the top of the valve cover, a valve handle fixedly connected to the upper end face of the valve stem, a main channel opened in the center of the ball, first partitions fixedly connected to the left and right sides of the inner wall of the main channel, a first secondary channel opened in the center of each of the two first partitions, and a connecting sleeve fixedly sleeved between the two first partitions, the number of the connecting sleeves being two and arranged vertically opposite each other, each connecting sleeve... The inner cavity of the cylinder has movable cavities at both the left and right ends. Each movable cavity is fitted with a first connecting rod. The opposite ends of the two first connecting rods on the left and right sides of the connecting sleeve extend to the outside of the left and right sides of the connecting sleeve, respectively. The end faces of the two first connecting rods on the outside of the connecting sleeve are fixedly connected to a first connecting block. A first sealing block is fixedly connected to the side of the first connecting block near the first partition. A first sealing ring is fixedly fitted to the surface of the first sealing block. The first sealing block cooperates with the first secondary channel and is arranged opposite to the left and right sides. A push rod is fixedly connected to the middle of the side of the first connecting block away from the first partition.

2. The large-diameter, fully welded, hard-seal ball valve for heating as described in claim 1, characterized in that: A movable block is fixedly connected to the end face of the first connecting rod located inside the movable cavity. A first spring is fixedly connected to the side of the movable block away from the first connecting rod. One end of the first spring is fixedly connected to the side of the movable cavity away from the first connecting block.

3. The large-diameter, fully welded, hard-seal ball valve for heating as described in claim 1, characterized in that: The two first connecting blocks are respectively located on the opposite sides of the two first partitions, and the opposite ends of the two push rods respectively extend to the outside of the left and right sides of the sphere.

4. A large-diameter, fully welded, hard-seal ball valve for heating as described in claim 1, characterized in that: Both push rods have movable grooves on their opposite ends, and a ball is movably fitted into each movable groove.

5. A large-diameter, fully welded, hard-seal ball valve for heating as described in claim 2, characterized in that: The valve body cavity is fixedly connected to the left and right sides of the second partition plate. The second partition plate has a second secondary channel in the middle. The top and bottom of each second partition plate are movably sleeved with a second connecting rod. The ends of the two opposite second connecting rods away from the ball are fixedly connected to a second connecting block. The middle of the second connecting block near the ball is fixedly connected to a second sealing block. The second sealing block cooperates with the second secondary channel and is arranged opposite to each other on the left and right. The surface of the second sealing block is fixedly sleeved with a second sealing ring.

6. A large-diameter, fully welded, hard-seal ball valve for heating as described in claim 5, characterized in that: Two opposing second connecting rods are fixedly connected to a fixing block on their ends near the sphere. The side of the fixing block near the sphere is in contact with the adjacent sphere. A second spring is fitted on the side of each second connecting rod near the sphere. One end of the second spring is fixedly connected to the side of the second partition near the sphere, and the other end of the second spring is fixedly connected to the side of the fixing block away from the sphere.

7. A large-diameter, fully welded, hard-seal ball valve for heating as described in claim 1, characterized in that: Welded sleeves are fixedly connected to both the left and right ends of the valve body, and sealing gaskets are fixedly connected inside the welded sleeves.

Images