Sealed leakage-free ball valve

Abstract

The utility model discloses a sealing leakage-free ball valve which comprises a ball valve body, a flowing channel is arranged between the two ends of the ball valve body in a penetrating mode, a ball valve element is arranged on the inner side of the flowing channel in a rotating mode, a first sealing limiting block is arranged on one side of the ball valve element, and a second sealing limiting block is arranged on the other side of the ball valve element. The first sealing limiting block and the second sealing limiting block are installed in the flowing channel in a sliding mode and fixed to the ball valve body through screws, a water inlet connecting end pipe is fixed to one end of the ball valve body, and a water outlet connecting end pipe is fixed to the other end of the ball valve body. The position of the ball valve element located in the flowing channel is limited through the first sealing limiting block and the second sealing limiting block, meanwhile, it is guaranteed that rotation of the ball valve element is not affected, the ball valve element can be detached and replaced conveniently, and the maintenance and overhaul efficiency of workers is improved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically a leak-proof ball valve. Background Technology

[0002] Ball valves are valves in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve axis. They can also be used for fluid regulation and control. Among them, the hard-seal V-type ball valve has a strong shearing force between the V-shaped ball core and the metal valve seat with hard alloy overlay, making it particularly suitable for media containing fibers, small solid particles, etc. Multi-port ball valves can not only flexibly control the merging, splitting, and switching of the flow direction of the media in pipelines, but also close any channel while connecting the other two channels. This type of valve should generally be installed horizontally in pipelines. Ball valves are classified according to the driving method as: pneumatic ball valves, electric ball valves, and manual ball valves.

[0003] However, existing ball valves have a solid metal casing, and the internal valve core is difficult and time-consuming to replace when problems occur; therefore, they do not meet the current requirements. In response, we have proposed a leak-proof ball valve. Utility Model Content

[0004] The purpose of this utility model is to provide a leak-proof ball valve to solve the problems mentioned in the background art, such as the ball valve shell being an integral metal casting and the internal valve core needing replacement due to problems, which are cumbersome and time-consuming to operate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof ball valve, comprising a ball valve body, a flow channel extending through both ends of the ball valve body, a ball valve core rotatably disposed on the inner side of the flow channel, a first sealing limit block disposed on one side of the ball valve core, and a second sealing limit block disposed on the other side of the ball valve core. The first and second sealing limit blocks are slidably installed inside the flow channel and fixed to the ball valve body by screws. An inlet connection pipe is fixed to one end of the ball valve body, and an outlet connection pipe is fixed to the other end of the ball valve body. The axes of the inlet connection pipe, the outlet connection pipe, and the flow channel are aligned.

[0006] Preferably, both the first sealing limit block and the second sealing limit block have through-holes in the axial direction, and the ball valve core has through-holes in the interior.

[0007] Preferably, the inner circular holes of the first sealing limit block and the second sealing limit block and the inner flow channel of the ball valve core have the same diameter, and the axis of the circular hole and the flow channel coincides with the axis of the flow channel.

[0008] Preferably, the ends of the first sealing limit block and the second sealing limit block that are in contact with the ball valve core are both provided with an inwardly recessed arc-shaped surface, and the inner surfaces of the two arc-shaped surfaces are provided with annular grooves.

[0009] Preferably, a sealing ring is snapped into the inner side of the annular groove, and the thickness of the sealing ring is 1.5 times the depth of the annular groove.

[0010] Preferably, a valve stem is rotatably inserted through the top of the ball valve body, a rotating handle is fixed to the outer side of the top of the valve stem, a rotating connecting strip is slidably inserted through the inside of the valve stem, a rotating insertion groove is provided on the top of the ball valve core, and the bottom end of the rotating connecting strip is inserted into the inner side of the rotating insertion groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention uses a first sealing limit block and a second sealing limit block to restrict the position of the ball valve core located inside the flow channel, while ensuring that the rotation of the ball valve core is not affected, which facilitates the disassembly and replacement of the ball valve core and improves the maintenance and repair efficiency of the staff. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the ball valve body of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the ball valve core of this utility model.

[0016] In the diagram: 1. Ball valve body; 2. Valve stem; 3. Rotary handle; 4. Rotary connecting strip; 5. Inlet connecting pipe; 6. Outlet connecting pipe; 7. Flow channel; 8. First sealing limit block; 9. Second sealing limit block; 10. Ball valve core; 11. Rotary insertion groove; 12. Sealing ring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] like Figures 1 to 3As shown, a leak-proof ball valve includes a ball valve body 1, a flow channel 7 extending through both ends of the ball valve body 1, a ball valve core 10 rotatably mounted inside the flow channel 7, a first sealing limit block 8 on one side of the ball valve core 10, and a second sealing limit block 9 on the other side of the ball valve core 10. The first sealing limit block 8 and the second sealing limit block 9 are slidably installed inside the flow channel 7 and fixed to the ball valve body 1 by screws. An inlet connection pipe 5 is fixed to one end of the ball valve body 1. The other end of the ball valve body 1 is fixed with an outlet connection pipe 6. The axes of the inlet connection pipe 5, the outlet connection pipe 6 and the flow channel 7 are kept coincident. The ball valve core 10 is clamped and limited by the first sealing limit block 8 and the second sealing limit block 9 which are slidably installed inside the flow channel 7, so as to ensure that the ball valve core 10 can rotate freely. After either the first sealing limit block 8 or the second sealing limit block 9 is removed, the ball valve core 10 can be taken out, which is convenient for replacing the ball valve core 10.

[0019] A valve stem 2 is rotatably inserted through the top of the ball valve body 1. A rotating handle 3 is fixed to the outer side of the top of the valve stem 2. A rotating connecting strip 4 is slidably inserted through the inside of the valve stem 2. A rotating insertion groove 11 is provided on the top of the ball valve core 10. The bottom end of the rotating connecting strip 4 is inserted into the inner side of the rotating insertion groove 11. The valve stem 2 and the ball valve core 10 are connected by the rotating connecting strip 4. When the rotating handle 3 drives the valve stem 2 to rotate, the valve stem 2 drives the ball valve core 10 to rotate through the rotating connecting strip 4, thereby realizing the opening or closing of the ball valve.

[0020] Both the first sealing limit block 8 and the second sealing limit block 9 have through holes in their axial direction. The ball valve core 10 has a flow channel inside it. The diameters of the through holes in the first sealing limit block 8 and the second sealing limit block 9 and the flow channel inside the ball valve core 10 are the same, and the axes of the through holes and the flow channel coincide with the axis of the flow channel 7. This ensures that after the end of the flow channel inside the ball valve core 10 is connected to the through holes in the first sealing limit block 8 and the second sealing limit block 9, the liquid medium can flow from one end of the flow channel 7 to the other end, ensuring the normal operation of the ball valve.

[0021] The ends of the first sealing limit block 8 and the second sealing limit block 9 that are in contact with the ball valve core 10 are both provided with inwardly concave arc-shaped surfaces. The inner surfaces of the two arc-shaped surfaces are provided with annular grooves. A sealing ring 12 is snapped into the inner side of the annular groove. The thickness of the sealing ring 12 is 1.5 times the depth of the annular groove. The sealing ring 12 is used to seal and fill the contact surfaces between the first sealing limit block 8, the second sealing limit block 9 and the ball valve core 10, ensuring that the liquid medium does not seep out of the ball valve core 10 along the contact surfaces between the first sealing limit block 8, the second sealing limit block 9 and the ball valve core 10.

[0022] Working principle: When using a ball valve to control the transport of liquid media inside a pipeline, the ball valve is fixedly connected to the pipeline through the inlet pipe 5 and outlet pipe 6 at the end of the valve body 1. Then, the operator holds the rotating handle 3 and drives the valve stem 2 to rotate. When the valve stem 2 rotates, it drives the ball valve core 10 to rotate through the rotating connecting strip 4. When the internal flow channel axis of the ball valve core 10 coincides with the flow channel 7 axis after rotation, the ball valve remains unobstructed, and the flow rate is at its maximum. To change the ball valve flow rate, simply rotate the rotating handle 3, causing the rotating connecting strip 4 to drive the ball valve core 10 to rotate, thus changing the flow rate of the ball valve core. The angle between the internal flow channel axis 10 and the flow channel 7 axis can regulate the flow rate of the ball valve. When the ball valve core 10 is damaged and needs to be replaced, simply use a screwdriver to remove the screws connecting the first sealing limit block 8 or the second sealing limit block 9 to the ball valve body 1, then remove the first sealing limit block 8 or the second sealing limit block 9, and then pull the rotating connecting strip 4 upward to separate it from the ball valve core 10. At this time, the ball valve core 10 is in a movable state and can move inside the flow channel 7, so the ball valve core 10 can be removed and replaced, reducing the maintenance and operation difficulty of the ball valve and improving the maintenance efficiency of the ball valve.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A leak-proof ball valve, comprising a ball valve body (1), characterized in that: A flow channel (7) is provided between the two ends of the ball valve body (1). A ball valve core (10) is rotatably provided inside the flow channel (7). A first sealing limit block (8) is provided on one side of the ball valve core (10), and a second sealing limit block (9) is provided on the other side of the ball valve core (10). The first sealing limit block (8) and the second sealing limit block (9) are slidably installed inside the flow channel (7) and fixed to the ball valve body (1) by screws. A water inlet connection pipe (5) is fixed to one end of the ball valve body (1). The other end of the valve body (1) is fixed with an outlet connection pipe (6). The axes of the inlet connection pipe (5), the outlet connection pipe (6) and the flow channel (7) are aligned. A valve stem (2) is inserted through the top of the ball valve body (1). A rotating handle (3) is fixed on the outer side of the top of the valve stem (2). A rotating connecting strip (4) is inserted through the inside of the valve stem (2). A rotating insertion groove (11) is provided on the top of the ball valve core (10). The bottom end of the rotating connecting strip (4) is inserted into the rotating insertion groove (11).

2. The leak-free sealing ball valve according to claim 1, characterized in that: Both the first sealing limit block (8) and the second sealing limit block (9) have axial through holes, and the ball valve core (10) has a flow channel inside.

3. The leak-free, sealed ball valve according to claim 2, characterized in that: The inner diameter of the round hole of the first sealing limit block (8) and the inner diameter of the flow channel of the ball valve core (10) are the same, and the axis of the round hole and the flow channel coincides with the axis of the flow channel (7).

4. The leak-free sealing ball valve according to claim 1, characterized in that: The ends of the first sealing limit block (8) and the second sealing limit block (9) that are in contact with the ball valve core (10) are both provided with an inwardly recessed arc-shaped surface, and the inner surfaces of the two arc-shaped surfaces are provided with annular grooves.

5. A leak-free, sealed ball valve according to claim 4, characterized in that: A sealing ring (12) is snapped into the inner side of the annular groove, and the thickness of the sealing ring (12) is 1.5 times the depth of the annular groove.

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