Ball valve flange structure

Abstract

The utility model discloses a ball valve flange structure which comprises a valve body, a valve rod, a gland flange, a top flange and an installation assembly. A valve rod is arranged on the valve body, the gland flange and the top flange are arranged on the valve rod in a sleeving mode, and the top flange is arranged on the top of the gland flange. The mounting assembly comprises a pin shaft, a first screw and a second screw; pin shaft holes are formed in the valve body, the gland flange and the top flange, the pin shaft is arranged in the pin shaft holes, the pin shaft is in interference fit with the valve body, the gland flange and the top flange, an exhaust face is arranged on the pin shaft, the first screw is used for connecting the gland flange with the valve body, and the second screw is used for connecting the valve body, the gland flange and the top flange. The pin shaft is in interference fit with the gland flange, the top flange and the valve body, the stable and smooth opening and closing process of the pneumatic actuator ball valve is guaranteed, the valve action stability is high, and the service life of the valve is long.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a ball valve flange structure. Background Technology

[0002] With the rapid development of industries such as petroleum and chemical engineering, the demand for valves is gradually increasing. Ball valves, in particular, are experiencing a significant surge in demand due to their advantages such as low fluid resistance, rapid opening and closing, and good sealing performance. In pipeline transportation within these industries, especially in applications requiring rapid response and frequent opening and closing, pneumatically actuatored ball valves are commonly used. In pneumatically actuatored ball valves, the valve body, cover flange, and top flange are connected by a pin shaft. The mainstream practice among valve manufacturers is to directly machine the pin holes on the valve body, cover flange, and top flange. During subsequent assembly, the pin shaft passes through the valve body, cover flange, and connecting body. This practice typically creates gaps between the pin shaft and these three components. Later, during operation, relative rotation occurs between the top flange, cover flange, and valve body, leading to incomplete valve opening and closing, poor stability, and a short valve lifespan. Summary of the Invention

[0003] According to an embodiment of the present utility model, a ball valve flange structure is provided, including: a valve body, a valve stem, a gland flange, a top flange, and a mounting assembly;

[0004] The valve body is equipped with a valve stem, and both the gland flange and the top flange are fitted onto the valve stem, with the top flange located on top of the gland flange;

[0005] The mounting components include: a pin, a first screw, and a second screw;

[0006] The valve body, gland flange, and top flange are provided with pin holes, and the pin is located in the pin holes. The pin is interference-fitted with the valve body, gland flange, and top flange. The pin is provided with a venting surface. The first screw is used to connect the gland flange and the valve body, and the second screw is used to connect the valve body, gland flange, and top flange.

[0007] Furthermore, the valve body has a mounting hole, and the valve stem has a mounting layer located inside the mounting hole.

[0008] Furthermore, a mating groove is provided on the outer side of the valve body corresponding to the mounting hole, and a mating protrusion is provided on the lower surface of the gland flange, with the mating protrusion located in the mating groove.

[0009] Furthermore, a gasket and a sealing ring are fitted on the valve stem. The sealing ring is located on the mounting layer of the valve stem, and the gasket is located on the sealing ring. The gasket and the sealing ring are located between the mounting layer and the mating protrusion.

[0010] Furthermore, the inner wall of the mating groove is stepped, and the outer wall of the mating protrusion is stepped and matches the shape of the inner wall of the mating groove.

[0011] Furthermore, the size of the pin hole is 0.5mm to 1mm smaller than the pin size.

[0012] Furthermore, a disassembly hole is provided on the top flange, a disassembly bolt is provided in the disassembly hole, a disassembly nut is provided on the disassembly bolt, the disassembly nut is located below the top flange, a first pad is provided on the valve body corresponding to the disassembly bolt, a second pad is provided on the first pad, and the lower end of the disassembly bolt rests on the second pad.

[0013] According to an embodiment of the present invention, a ball valve flange structure is provided. This application connects the gland flange, top flange, and valve body via an installation assembly. An interference fit between the pin and the gland flange, top flange, and valve body ensures smooth and stable operation of the pneumatic actuator ball valve, resulting in high valve stability and a long service life. An venting surface is provided on the pin to ensure smooth pin assembly.

[0014] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a ball valve flange structure according to an embodiment of the present utility model;

[0016] Figure 2 This is a partial structural diagram of a ball valve flange structure according to an embodiment of the present utility model;

[0017] Figure 3 This is a partial front view of a ball valve flange structure according to an embodiment of the present utility model;

[0018] Figure 4 This is a partial top view of a ball valve flange structure according to an embodiment of the present utility model;

[0019] Figure 5 This is a partial sectional view of a ball valve flange structure according to an embodiment of the present utility model;

[0020] Figure 6 This is a disassembly diagram of a ball valve flange structure according to an embodiment of the present utility model.

[0021] In the figure, the following labels are used: 1 is valve body, 2 is valve stem, 21 is mounting layer, 3 is gland flange, 31 is mating protrusion, 4 is top flange, 5 is mounting assembly, 51 is pin, 52 is first screw, 53 is second screw, 6 is disassembly bolt, 7 is disassembly nut, 8 is first pad, and 9 is second pad. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0023] like Figures 1-6 As shown, a ball valve flange structure according to an embodiment of the present invention includes: a valve body 1, a valve stem 2, a gland flange 3, a top flange 4, and a mounting assembly 5;

[0024] The valve body 1 is provided with a valve stem 2, and the gland flange 3 and the top flange 4 are both sleeved on the valve stem 2, with the top flange 4 located on top of the gland flange 3;

[0025] Mounting component 5 includes: pin 51, first screw 52, ​​and second screw 53;

[0026] The valve body 1, gland flange 3, and top flange 4 are provided with pin holes 51. The pin 51 is located in the pin hole and is interference-fitted with the valve body 1, gland flange 3, and top flange 4. The pin 51 has a venting surface. The first screw 52 is used to connect the gland flange 3 to the valve body 1, and the second screw 53 is used to connect the valve body 1, gland flange 3, and top flange 4. The size of the pin hole 51 is 0.5mm to 1mm smaller than the size of the pin 51.

[0027] This application connects the gland flange 3, top flange 4, and valve body 1 via mounting component 5. The pin 51, with its interference fit with the gland flange 3, top flange 4, and valve body 1, ensures smooth and stable operation of the pneumatic actuator ball valve, resulting in high valve stability and a long service life. An venting surface on the pin 51 ensures smooth assembly of the pin 51.

[0028] like Figure 5 As shown, the valve body 1 has a mounting hole, and the valve stem 2 has a mounting layer 21 located inside the mounting hole. A mating groove is provided on the outer side of the valve body 1 corresponding to the mounting hole, and a mating protrusion 31 is provided on the lower surface of the gland flange 3, located within the mating groove. The inner wall of the mating groove is stepped, and the outer wall of the mating protrusion 31 is stepped and matches the shape of the inner wall of the mating groove.

[0029] In this embodiment, by setting the mating groove and mating protrusion 31 in a stepped shape, the gland flange 3 is fitted onto the valve body 1, thereby improving the stability of the installation of the gland flange 3, valve body 1 and valve stem 2.

[0030] like Figure 5 As shown, a gasket and a sealing ring are fitted on the valve stem 2. The sealing ring is located on the mounting layer 21 of the valve stem 2, and the gasket is located on the sealing ring. The gasket and the sealing ring are located between the mounting layer 21 and the mating protrusion 31.

[0031] By setting a gasket and a sealing ring between the mounting layer 21 and the mating protrusion 31, the gasket can protect the sealing ring and prevent damage to the sealing ring, while the sealing ring provides a waterproof effect.

[0032] like Figure 6As shown, a disassembly hole is provided on the top flange 4, and a disassembly bolt 6 is provided in the disassembly hole. A disassembly nut 7 is provided on the disassembly bolt 6. The disassembly nut 7 is located below the top flange 4. A first pad 8 is provided on the valve body 1 corresponding to the disassembly bolt 6. A second pad 9 is provided on the first pad 8. The lower end of the disassembly bolt 6 rests on the second pad 9.

[0033] In this embodiment, when disassembling the gland flange 3, the disassembly bolt 6 is passed through the top flange 4 from above, and the disassembly nut 7 is screwed on from below the disassembly bolt 6. The disassembly nut 7 is then fitted to the top flange 4. The first pad 8 is placed on the valve body 1, and then the second pad 9 is placed on the first pad 8, so that the second pad 9 is located below the disassembly bolt 6. The disassembly nut 7 is fixed with a wrench, and the disassembly bolt 6 is turned to move it downward, causing the top flange 4 to move away from the gland flange 3, thereby removing the gland flange 3 from the valve body 1 and improving the disassembly efficiency of the gland flange 3.

[0034] In this embodiment, the first pad 8 is made of non-metallic material, and the second pad 9 is made of metallic material. During disassembly, the first pad 8 fits snugly against the valve body 1, preventing damage to the surface quality of the valve body 1 and avoiding subsequent operations such as rework of the valve body 1, thus reducing costs. The second pad 9 fits snugly against the disassembly bolt 6, making the disassembly process smoother.

[0035] Above, refer to Figures 1-6 This application describes a ball valve flange structure according to an embodiment of the present invention. The gland flange 3, top flange 4, and valve body 1 are connected by mounting assembly 5. An interference fit between the pin 51 and the gland flange 3, top flange 4, and valve body 1 ensures smooth and stable operation of the pneumatic actuator ball valve, high valve stability, and long valve service life. An venting surface on the pin 51 ensures smooth assembly of the pin 51.

[0036] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A ball valve flange structure, characterized in that, include: Valve body, valve stem, gland flange, top flange, and mounting components; The valve body is provided with a valve stem, and the gland flange and the top flange are both sleeved on the valve stem, with the top flange located on top of the gland flange; The mounting components include: a pin, a first screw, and a second screw; The valve body, gland flange, and top flange are provided with pin holes, the pin is located in the pin holes, the pin is interference-fitted with the valve body, gland flange, and top flange, and the pin is provided with a venting surface. The first screw is used to connect the gland flange and the valve body, and the second screw is used to connect the valve body, gland flange, and top flange.

2. The ball valve flange structure as described in claim 1, characterized in that, The valve body has a mounting hole, and the valve stem has a mounting layer located inside the mounting hole.

3. The ball valve flange structure as described in claim 2, characterized in that, A mating groove is provided on the outer side of the valve body at the corresponding mounting hole, and a mating protrusion is provided on the lower surface of the gland flange, the mating protrusion being located within the mating groove.

4. The ball valve flange structure as described in claim 3, characterized in that, The valve stem is fitted with a washer and a sealing ring. The sealing ring is located on the mounting layer of the valve stem, and the washer is located on the sealing ring. The washer and the sealing ring are located between the mounting layer and the mating protrusion.

5. The ball valve flange structure as described in claim 3, characterized in that, The inner wall of the mating groove is stepped, and the outer wall of the mating protrusion is stepped and matches the shape of the inner wall of the mating groove.

6. The ball valve flange structure as described in claim 1, characterized in that, The size of the pin hole is 0.5mm to 1mm smaller than the pin size.

7. The ball valve flange structure as described in claim 1, characterized in that, The top flange has a disassembly hole, a disassembly bolt is installed in the disassembly hole, a disassembly nut is installed on the disassembly bolt, the disassembly nut is located below the top flange, the valve body has a first pad corresponding to the disassembly bolt, a second pad is installed on the first pad, and the lower end of the disassembly bolt rests on the second pad.

Images