Top-mounted fully-wrapped ball valve

Abstract

The utility model relates to the technical field of ball valves, and provides a top-mounted fully-wrapped ball valve used for solving the problem of water retention, the top-mounted fully-wrapped ball valve comprises a lower valve body, an upper valve cover, a ball core, a valve rod and a driving piece, the outer wall of the ball core is wrapped with a first wrapping block and a second wrapping block, and the first wrapping block and the second wrapping block are provided with a first rotating groove and a second rotating groove respectively; the first rotating groove and the second rotating groove are spliced to form a ball core cavity, the side wall of the first wrapping block and the side wall of the second wrapping block are tightly attached to the inner wall of a valve core mounting cavity of the lower valve body, and the lower surface of the upper valve deck is provided with a downward-pressing boss abutting against the first wrapping block and the second wrapping block in a downward-protruding mode. The first wrapping block and the second wrapping block are respectively provided with a valve rod rotating channel, the first wrapping block and the second wrapping block are respectively provided with a water passing channel communicated with a ball core internal channel and a water body inlet and outlet channel of the valve body, and the first wrapping block and the second wrapping block are located at the inner ends of the water passing channels and provided with sealing seats for providing sealing performance for the ball core.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a top-mounted fully enclosed ball valve. Background Technology

[0002] Ball valves are widely used due to their advantages such as ease of operation and good sealing performance. For example... Figure 1 In existing technology, top-entry ball valves mainly include a valve body 1, a valve cover 7, a ball core 2, a spherical sealing seat 3, and a valve stem 4. Typically, the ball core and the spherical sealing seat work together to rotate and seal inside the valve body. Specifically, sealing seats are installed on the water passages 5 on both sides of the ball core inside the valve body. The ball core rotates and seals itself within the spherical sealing seats on both sides, achieving water flow and sealing. Due to the installation structure of the spherical sealing seat, a large gap 6 remains between the outer wall of the ball core and the inner wall of the valve body after installation. When the ball valve is operating, bodily fluids easily accumulate in this gap. Due to the lack of an effective drainage design, the liquid accumulated in this gap cannot be drained before valve maintenance. When the transported liquid is a hazardous liquid, the accumulation of hazardous liquid in the gap not only interferes with maintenance operations but also poses a safety hazard of leakage, endangering the health of maintenance personnel.

[0003] To address the aforementioned issues, this paper proposes a ball valve that eliminates the distance between the ball core and the inner wall of the valve body. Utility Model Content

[0004] Therefore, in view of the above problems, this utility model proposes a top-mounted fully enclosed ball valve for solving the problem of water retention.

[0005] To solve the above-mentioned technical problems, the solution adopted by this utility model is as follows: a top-mounted fully enclosed ball valve, including a lower valve body, an upper valve cover, a ball core, a valve stem, and a driving component, characterized in that: the outer wall of the ball core is covered with a first enclosing block and a second enclosing block, the first enclosing block and the second enclosing block are respectively provided with a first rotating groove and a second rotating groove, the first rotating groove and the second rotating groove are combined to form a ball core cavity that fits against the surface of the ball core, the side walls of the first enclosing block and the second enclosing block are close to the inner wall of the valve core mounting cavity of the lower valve body, the lower surface of the upper valve cover is provided with a downward protruding pressing boss that abuts against the first enclosing block and the second enclosing block, the first enclosing block and the second enclosing block are provided with a valve stem rotating channel from the top to the bottom, communicating with the ball core cavity, the first enclosing block and the second enclosing block are respectively provided with a water passage that communicates with the internal channel of the ball core and the water inlet and outlet channel of the valve body, and the first enclosing block and the second enclosing block are provided with a sealing seat at the inner end of the water passage that provides sealing performance for the ball core.

[0006] A further improvement is that the sealing seat is integrally disposed on the first package block and the second package block.

[0007] A further improvement is that the sealing seat is provided in two parts, with the first and second blocks each having an insert groove, the sealing seat being disposed in the insert groove, and a first gasket being disposed between the bottom surface of the sealing seat and the bottom of the insert groove.

[0008] A further improvement is that the first gasket is a rubber sealing ring, a butterfly spring gasket, or a graphite sealing ring.

[0009] A further improvement is that the outer surface of the first and second blocks is tapered from top to bottom to form an inclined outer wall, the inner wall of the valve core mounting cavity of the lower valve body is an inclined inner wall, and the first and second blocks are interference-fitted with the inner wall of the valve core mounting cavity.

[0010] A further improvement is that the first block and the second block are combined to form a cylinder or prism.

[0011] A further improvement is that the top surface of the first package block and / or the second package block has a downward mounting hole.

[0012] A further improvement is that the upper valve cover has an upper mounting hole corresponding to the lower mounting hole, which is opened from the bottom surface upwards. A fixing pin is fixedly installed in the lower mounting hole, and the upper end of the fixing pin is movably inserted into the upper mounting hole.

[0013] A further improvement is that a disassembly hole is provided at the upper end of the fixing pin.

[0014] A further improvement is that the lower mounting hole is a threaded hole, and the fixing pin is a threaded rod.

[0015] A further improvement is that the materials of the first and second packages are soft sealing materials or metal materials.

[0016] A further improvement is that the first and second packages have mounting grooves on the outer periphery of the water passage, and a sealing ring is provided in the mounting groove.

[0017] A further improvement is that the sealing ring is a plastic sealing ring or a graphite sealing ring.

[0018] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0019] 1. In this design, the ball core is covered by a first and a second encasing block, and the sidewalls of the encasing blocks are tightly attached to the inner walls of the lower valve body and the upper valve cover. This completely eliminates the installation gap between the ball core and the inner wall of the valve body, preventing the dangerous liquid being transported from stagnating in the gap. This effectively prevents maintenance interference and leakage risks caused by liquid stagnation, significantly improves the safety of ball valve use, and protects the health of maintenance personnel.

[0020] 2. In this case, the material of the ball valve can be flexibly selected from soft sealing materials or specific metal materials according to the nature of the liquid being transported and the working pressure environment, so as to adapt to the needs of different working environments and media and improve the versatility and reliability of the ball valve.

[0021] 3. Furthermore, in this case, the sealing seat adopts a split design, with a first gasket placed between the bottom surface of the sealing seat and the bottom of the mounting groove. The split design reduces the requirements for the machining accuracy of the block, increases the contact pressure between the sealing seat and the ball core, and further improves the sealing effect. Under the condition that the sealing performance is guaranteed, the clamping force of the block on the ball core can be reduced by slightly increasing the inner diameter of the ball core cavity, which facilitates the rotation of the ball core. Moreover, it can use its own slight deformation to compensate for the wear of the spherical surface and the sealing seat mating surface, maintain the sealing effect, and extend the service life of the sealing element.

[0022] 4. In this case, the outer walls of the first and second packages are inclined, and their interference fit with the inner wall of the lower valve body under the pressure of the upper valve cover ensures that gaps are completely eliminated during installation.

[0023] 5. The mounting hole, fixing pin, and disassembly hole on the top surface of the package block in this case not only restrict the rotation of the first and second packages block relative to the valve body, but also allow the packages block to be removed from the valve body using the fixing pin and disassembly hole. Preferably, the mounting hole is a threaded hole and the fixing pin is a threaded rod. The connection between the threaded rod and the threaded hole simplifies the structure and installation, and also allows maintenance personnel to directly pull the packages block out of the valve core mounting cavity, avoiding damage to components and improving disassembly and assembly efficiency.

[0024] 6. The design of the upper valve cover with the lower pressing boss in this case ensures that the top and bottom surfaces of the block are tightly attached to the upper valve cover and the bottom surface of the ball core cavity, respectively, further eliminating gaps, ensuring structural stability, and preventing liquid leakage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of existing technology in the background art.

[0026] Figure 2 , 3 This is a schematic diagram of the structure of the top-mounted fully enclosed ball valve according to Embodiment 1 of this utility model.

[0027] Figure 4 , 5 This is a schematic diagram of the structure of the top-mounted fully enclosed ball valve according to Embodiment 2 of this utility model.

[0028] Figure 6 , 7 This is a schematic diagram of the structure of the first and second enclosed blocks in the top-mounted fully enclosed ball valve of this utility model embodiment. Detailed Implementation

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Example 1:

[0030] refer to Figure 2 , 3 This utility model discloses a ball valve with a gapless ball core 12 assembly, including a lower valve body 10, an upper valve cover 11, a ball core 12, a valve stem 13, and a drive component. The two connecting ends of the lower valve body 10 can be provided with internal or external connecting threads, and can also be equipped with flanges or other connecting components integrally or separately. The upper valve cover 11 is installed on the top surface of the lower valve body 10 by bolts, and a sealing gasket 14 is pressed between the upper valve cover 11 and the top surface of the valve body. The ball core 12 is disposed in the valve core mounting cavity of the lower valve body 10. The lower end of the valve stem 13 is rotatably and sealingly connected to the upper valve cover 11, and the valve stem 13 passes through the upper valve cover 11 and is connected to the ball core 12. The drive component is fixedly disposed on the top of the valve stem 13, and the drive component can be a manual drive component or an electric drive component (not shown in the figure), etc. The outer wall of the ball core 12 is covered with a first block 15 and a second block 16. The first block 15 and the second block 16 are respectively provided with a first rotating groove and a second rotating groove with smooth inner walls. The first rotating groove and the second rotating groove are combined to form a ball core cavity 17 that fits against the surface of the ball core 12. The side walls of the first block 15 and the second block 16 are close to the inner wall of the valve core mounting cavity of the lower valve body 10. The lower surface of the upper valve cover 11 is provided with a downward protruding boss 18 that abuts against the first block 15 and the second block 16. The first block 15 and the second block 16 are provided with a valve stem rotating channel 19 that connects to the ball core cavity 17 from the top to the bottom. The first block 15 and the second block 16 are respectively provided with a water passage 20 that connects to the internal channel of the ball core 12 and the water inlet and outlet channel of the valve body. The first block and the second block are provided with a sealing seat 25 that provides sealing performance for the ball core at the inner end of the water passage.

[0031] The first sealing block 15 and the second sealing block 16 are made of soft sealing material or metal material, specifically plastic, UPE, PTFE, PEEK, nylon, or copper, stainless steel, alloy, etc. The first sealing block 15 and the second sealing block 16 clamp the ball core 12 to eliminate the gap between the ball core 12 and the first sealing block 15 and the second sealing block 16. When the first sealing block and the second sealing block are made of plastic material, the ball core 12 directly blocks the water passage to achieve a seal under the clamping of the first sealing block 15 and the second sealing block 16. The blocks can also be directly tightened and sealed against the inner wall of the valve body. The first block 15 and the second block 16 are pressed and fixed inside the ball core cavity 17 by the downward pressing boss 18 of the upper valve cover 11, so that the top and bottom surfaces of the first block 15 and the second block 16 are respectively close to the upper valve cover 11 and the bottom surface of the ball core cavity 17, and the first block 15 and the second block 16 are close to the side wall of the ball core cavity 17, which further eliminates the gap between the first block 15, the second block 16 and the valve body, effectively preventing the retention and leakage of dangerous liquid, and improving the safety performance of the ball valve for conveying dangerous liquid.

[0032] Furthermore, the first and second packages have mounting grooves 28 on the outer periphery of the water passage, and a sealing ring 29 is provided in the mounting groove. The sealing ring is made of a material with sealing effect, such as a plastic sealing ring or a graphite sealing ring. Furthermore, the outer side of the first package 15 and the second package 16 tapers from top to bottom to form an inclined outer wall 21 that is tightly fitted with the inner wall of the valve core mounting cavity. The inner wall of the valve core mounting cavity of the lower valve body 10 is an inclined inner wall 21. Under the pressure of the upper valve cover 11, the first package 15 and the second package 16 are interference-fitted with the inner wall of the valve core mounting cavity to completely eliminate the installation gap.

[0033] Furthermore, the first package 15 and the second package 16 are assembled to form a cylinder or prism (preferably a quadrangular prism). The top surface of the first package 15 and / or the second package 16 has a downward-facing lower mounting hole 22. Preferably, both the first package 15 and the second package 16 have a lower mounting hole 22. The upper valve cover has an upper mounting hole 23 corresponding to the lower mounting hole 22, extending upwards from its bottom surface. A fixing pin 24 is fixedly installed within the lower mounting hole 22, with its upper end movably passing through the upper mounting hole 23. A disassembly hole 27 is provided at the upper end of the fixing pin. Preferably, the lower mounting hole 22 is a threaded hole, and the fixing pin 24 is a threaded rod, facilitating the mating installation of the fixing pin 24 and the lower mounting hole 22.

[0034] The lower mounting hole 22 has two functions: First, it cooperates with the fixing pin 24 to facilitate the removal of the package block from the valve body using external tools. When this function is achieved, the fixing pin 24 does not need to be assembled in the valve body. The fixing pin 24 can be fixed in the lower mounting hole 22 when the package block needs to be disassembled later. Second, when the first package block 15 and the second package block 16 are assembled into a cylinder (the prism will not rotate with the rotation of the ball core), the ball core 12 is restricted from rotating, which drives the first package block 15 and the second package block 16 to rotate. At this time, the fixing pin 24 is assembled into the valve body, which also facilitates the direct removal of the package block later.

[0035] External tools can be used to directly clamp the fixing pin 24 to pull out the package, or auxiliary tools such as wire or hooks can be passed through the disassembly hole 27 and fixed to the fixing pin 24 to remove the package. Example 2:

[0036] refer to Figure 4 , 5 Based on the aforementioned technical solution, the sealing seat 25 is separately disposed from the first package 15 and the second package 16. The sealing seat is a spherical sealing seat 25'. The first package and the second package are respectively provided with an insert groove. The sealing seat is disposed in the insert groove. A first washer 26 is provided between the bottom surface of the spherical sealing seat 25' and the bottom of the insert groove to increase the elastic abutment sealing effect between the spherical sealing seat 25' and the ball core 12. The first washer 26 is a rubber sealing ring, a butterfly spring washer, or a graphite sealing ring, selected according to the working environment of the valve.

[0037] The first washer 26 increases the contact pressure between the spherical sealing seat 25' and the ball core 12, improving the sealing effect. Furthermore, the first washer 26 can compensate for the wear of the sealing surface of the spherical sealing seat 25' using its own slight deformation, further reducing the precision requirements of the packing block. The contact surface between the ball core 12 and the spherical sealing seat 25' achieves a seal on the ball core 12, reducing the precision requirements of the packing block and decreasing the clamping force of the packing block on the ball core 12, which is beneficial for the rotational drive of the ball core 12.

[0038] In the case of low strength requirements for internal components of the valve body, the spherical sealing seat 25' can also be replaced with flexible sealing components such as rubber sealing rings.

[0039] In the above-mentioned technical solutions, such as 6 and 7, the clamping mating surface 27 of the first block 15 and the second block 16 can be located on the same plane (i.e., the cross section of the splicing path is a straight line), or it can be located on multiple planes (i.e., the cross section of the splicing path is a broken line), or it can be located on the center plane of the spliced ​​column, or it can be offset from the center plane of the column.

[0040] According to the above technical solution, the fixing pin 24 can also be a columnar pin, with its lower end directly tightened and fixed in the lower mounting hole, and its upper end inserted into the mounting hole with a gap.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions above are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A top-mounted, fully enclosed ball valve, comprising a lower valve body, an upper valve cover, a ball core, a valve stem, and a drive component, characterized in that: The outer wall of the ball core is covered with a first block and a second block. The first block and the second block are respectively provided with a first rotating groove and a second rotating groove. The first rotating groove and the second rotating groove are joined together to form a ball core cavity that fits against the surface of the ball core. The side walls of the first block and the second block are close to the inner wall of the valve core mounting cavity of the lower valve body. The lower surface of the upper valve cover is provided with a downward protrusion that abuts against the first block and the second block. The first block and the second block are provided with a valve stem rotating channel that connects to the ball core cavity from the top to the bottom. The first block and the second block are respectively provided with a water passage that connects to the internal channel of the ball core and the water inlet and outlet channel of the valve body. The first block and the second block are provided with a sealing seat that provides sealing performance for the ball core at the inner end of the water passage.

2. The top-mounted fully enclosed ball valve according to claim 1, characterized in that: The sealing seat is integrally disposed on the first package block and the second package block.

3. The top-mounted fully enclosed ball valve according to claim 1, characterized in that: The sealing seat is provided in two parts. The first package and the second package are respectively provided with an insert groove. The sealing seat is disposed in the insert groove. A first gasket is provided between the bottom surface of the sealing seat and the bottom of the insert groove.

4. The top-mounted fully enclosed ball valve according to claim 3, characterized in that: The first gasket is a rubber sealing ring, a butterfly spring gasket, or a graphite sealing ring.

5. The top-mounted fully enclosed ball valve according to any one of claims 1-4, characterized in that: The outer surface of the first and second blocks tapers downward to form an inclined outer wall, and the inner wall of the valve core mounting cavity of the lower valve body is an inclined inner wall. The first and second blocks are interference-fitted with the inner wall of the valve core mounting cavity.

6. The top-loading fully enclosed ball valve according to any one of claims 1-4, characterized in that: The first block and the second block are combined to form a cylinder or prism.

7. The top-mounted fully enclosed ball valve according to any one of claims 1-4, characterized in that: The top surface of the first package block and / or the second package block has a downward mounting hole.

8. The top-mounted fully enclosed ball valve according to claim 7, characterized in that: The upper valve cover has an upper mounting hole corresponding to the lower mounting hole, which is opened from the bottom surface upward. A fixing pin is fixedly installed in the lower mounting hole, and the upper end of the fixing pin is movably inserted into the upper mounting hole.

9. The top-mounted fully enclosed ball valve according to claim 8, characterized in that: The upper end of the fixing pin has a disassembly hole.

10. The top-mounted fully enclosed ball valve according to claim 9, characterized in that: The lower mounting hole is a threaded hole, and the fixing pin is a threaded rod.

11. The top-loading fully enclosed ball valve according to any one of claims 1-4, characterized in that: The first and second packages are made of soft sealing material or metal material.

12. The top-mounted fully enclosed ball valve according to claim 11, characterized in that: The first and second packages have mounting grooves on the outer periphery of the water passage, and a sealing ring is provided in the mounting groove.

13. The top-mounted fully enclosed ball valve according to claim 12, characterized in that: The sealing ring is a plastic sealing ring or a graphite sealing ring.

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