A gas isolation valve

Abstract

The utility model belongs to gas flow regulation technical field, especially a kind of gas isolation valve, including valve seat, the bonnet being connected with valve seat, the valve ball being arranged in valve seat, the valve stem being connected with valve ball, and handle being connected with valve stem, annular rubber pad is respectively equipped between valve ball and valve seat and between valve ball and bonnet, the mounting groove for installing rubber pad is respectively equipped on valve seat and bonnet, the end face of mounting groove is formed annular protrusion by convex, annular recess is formed between annular protrusion and the side wall of mounting groove, annular gap that is compatible with annular protrusion is equipped on rubber pad, one end of rubber pad close to the end of mounting groove end face is clamped in annular recess, the inner side wall of rubber pad and valve ball contact is camber surface, camber surface is compatible with valve ball.

Description

Technical Field

[0001] This utility model belongs to the field of gas flow regulation technology, and specifically refers to a gas isolation valve. Background Technology

[0002] Gas isolation valves are key components in the field of industrial gas control. They are mainly used for the opening and closing control and flow regulation of gas in pipeline systems, which are connected to household appliances such as gas stoves, boilers, and fireplaces.

[0003] The gas isolation valve includes a valve seat, a valve cap connected to the valve seat, a valve ball disposed within the valve seat, a valve stem connected to the valve ball, and a handle connected to the valve stem. Annular rubber gaskets are provided between the valve ball and the valve seat, and between the valve ball and the valve cap. The rubber gaskets have a semi-circular cross-section, which does not fit well with the valve seat and valve cap, making them prone to misalignment and failure. Utility Model Content

[0004] The purpose of this invention is to provide a gas isolation valve that can effectively prevent the rubber gasket from deviating and failing.

[0005] This utility model is implemented as follows: A gas isolation valve includes a valve seat, a valve cap connected to the valve seat, a valve ball disposed within the valve seat, a valve stem connected to the valve ball, and a handle connected to the valve stem. Annular rubber pads are respectively provided between the valve ball and the valve seat, and between the valve ball and the valve cap. The valve seat and valve cap are respectively provided with mounting grooves for mounting the rubber pads. The end face of the mounting groove protrudes outward to form an annular protrusion, and an annular groove is formed between the annular protrusion and the side wall of the mounting groove. The rubber pad has an annular notch adapted to the annular protrusion. One end of the rubber pad near the end face of the mounting groove is engaged in the annular groove. The inner side wall of the rubber pad in contact with the valve ball is an arc surface, which is adapted to the valve ball.

[0006] In the aforementioned gas isolation valve, the lower end of the handle is fitted onto the valve stem and fixedly mounted on the valve stem by a pin. The valve stem has a first mounting hole, and the handle has a second mounting hole. The pin is interference-fitted with the first and second mounting holes.

[0007] In the aforementioned gas isolation valve, the pin includes a frustum section and a cylindrical section. The diameter of the frustum section gradually decreases from the outer diameter of the cylindrical section, and the maximum diameter of the frustum section is equal to the diameter of the cylindrical section. The taper of the frustum section is 1:6-1:10. The frustum section accounts for 0.4-0.5 times the total length of the pin. The cylindrical section is interference-fitted with mounting holes one and two.

[0008] In the aforementioned gas isolation valve, the pin has a diameter of 2mm, a lower deviation of +0.05mm and an upper deviation of +0.08mm, and the mounting holes one and two have a diameter of 2mm, with a lower deviation of -0.05mm and an upper deviation of 0.

[0009] In the aforementioned gas isolation valve, the valve seat is provided with a limiting protrusion ring to limit the valve cap.

[0010] In the aforementioned gas isolation valve, the valve cap has an external thread on its outer periphery, and the valve seat has an internal thread that matches the external thread. The valve seat also has a relief groove at the end of the internal thread near the limiting protrusion ring.

[0011] In one of the gas isolation valves described above, the upper end of the handle is a flat oval shape.

[0012] The outstanding advantages of this utility model compared to the prior art are: This invention features an annular protrusion formed by the outward protrusion of the end face of the mounting groove, and an annular groove formed between the annular protrusion and the side wall of the mounting groove. An annular notch adapted to the annular protrusion is provided on the rubber pad. One end of the rubber pad near the end face of the mounting groove is engaged in the annular groove, thus limiting the rubber pad within the mounting groove. At the same time, an arc surface adapted to the valve ball is provided on the rubber pad to effectively prevent the rubber pad from deviating, thereby ensuring that the rubber pad can effectively seal between the valve seat and the valve ball, as well as between the valve cap and the valve ball. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 This is a cross-sectional view of the present invention.

[0015] Figure 3 This is a cross-sectional view of the valve seat of this utility model.

[0016] Figure 4 This is a perspective view of the valve cap of this utility model.

[0017] Figure 5 This utility model relates to a three-dimensional rubber pad. Figure 1 .

[0018] Figure 6 This utility model relates to a three-dimensional rubber pad. Figure 2 .

[0019] Figure 7 This is an exploded view of this utility model.

[0020] Figure 8 This is a cross-sectional view of the present invention from another angle.

[0021] Reference numerals: 1. Valve seat; 2. Valve cap; 3. Valve ball; 4. Valve stem; 5. Handle; 6. Rubber pad; 7. Mounting groove; 8. Annular protrusion; 9. Annular groove; 10. Annular notch; 11. Arc surface; 12. Pin; 12a. Frustum section; 12b. Cylindrical section; 13. Assembly hole one; 14. Assembly hole two; 15. Limiting protrusion; 16. Relief groove. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —8: A gas isolation valve includes a valve seat 1, a valve cap 2 connected to the valve seat 1, a valve ball 3 disposed within the valve seat 1, a valve stem 4 connected to the valve ball 3, and a handle 5 connected to the valve stem 4. Annular rubber pads 6 are respectively provided between the valve ball 3 and the valve seat 1, and between the valve ball 3 and the valve cap 2. The valve seat 1 and the valve cap 2 are respectively provided with mounting grooves 7 for mounting the rubber pads 6. The end face of the mounting groove 7 protrudes outward to form an annular protrusion 8. An annular groove 9 is formed between the annular protrusion 8 and the side wall of the mounting groove 7. The rubber pad 6 is provided with an annular notch 10 that matches the annular protrusion 8. One end of the rubber pad 6 near the end face of the mounting groove 7 is engaged in the annular groove 9. The inner side wall of the rubber pad 6 that contacts the valve ball 3 is an arc surface 11, which matches the valve ball 3.

[0023] like Figure 1-7 As shown, the present invention forms an annular protrusion 8 by protruding the end face of the mounting groove 7, and an annular groove 9 is formed between the annular protrusion 8 and the side wall of the mounting groove 7. An annular notch 10 adapted to the annular protrusion 8 is provided on the rubber pad 6. One end of the rubber pad 6 near the end face of the mounting groove 7 is engaged in the annular groove 9, which limits the rubber pad 6 in the mounting groove 7. At the same time, an arc surface 11 adapted to the valve ball 3 is provided on the rubber pad 6 to effectively prevent the rubber pad 6 from deviating, so as to ensure that the rubber pad 6 can effectively seal between the valve seat 1 and the valve ball 3, and between the valve cap 2 and the valve ball 3.

[0024] The connection structure between handle 5 and valve stem 4 is as follows: Figure 1 , 2 As shown in Figures 7 and 8, the lower end of the handle 5 is fitted onto the valve stem 4 and fixedly mounted on the valve stem 4 by a pin 12. The valve stem 4 has a first mounting hole 13 and the handle 5 has a second mounting hole 14. The pin 12 is interference-fitted with the first mounting hole 13 and the second mounting hole 14, making the connection firm and reliable. The pin 12 is not easy to come off, and the structure is simple, making it easy to process and install.

[0025] The specific structure of pin 12 is as follows: Figure 7 , 8As shown, the pin 12 includes a frustum section 12a and a cylindrical section 12b. The diameter of the frustum section 12a gradually decreases outward from the cylindrical section 12b, and the maximum diameter of the frustum section 12a is equal to the diameter of the cylindrical section 12b. The taper of the frustum section 12a is 1:6-1:10. The frustum section 12a occupies 0.4-0.5 times the total length of the pin 12. The cylindrical section 12b is interference-fitted with mounting holes 13 and 14. The frustum section 12a effectively guides the installation of the pin 12, facilitating its installation.

[0026] In this embodiment, the taper of the frustum section 12a is 1:8, the length of the frustum section 12a is 3.2mm, the pin 12 assembly is 7mm, and the frustum section 12a accounts for 0.457 times the total length of the pin 12.

[0027] Furthermore, the diameter of the pin 12 is 2mm, the lower deviation of the diameter of the pin 12 is +0.05mm, the upper deviation is +0.08mm, the diameter of the first mounting hole 13 and the second mounting hole 14 is 2mm, the lower deviation of the first mounting hole 13 and the second mounting hole 14 is -0.05mm, and the upper deviation is 0.

[0028] To prevent the valve cap 2 from being excessively screwed into the valve seat 1, the valve seat 1 is provided with a limiting protrusion 15 to limit the valve cap 2.

[0029] Furthermore, the valve cap 2 has an external thread on its outer periphery, and the valve seat 1 has an internal thread that matches the external thread. The valve seat 1 has a relief groove 16 at the end of the internal thread near the limiting protrusion ring 15.

[0030] To facilitate the rotation of the handle 5, the upper end of the handle 5 is flat and oval.

[0031] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A gas isolation valve, comprising a valve seat (1), a valve cap (2) connected to the valve seat (1), a valve ball (3) disposed in the valve seat (1), a valve stem (4) connected to the valve ball (3), and a handle (5) connected to the valve stem (4), wherein annular rubber pads (6) are respectively provided between the valve ball (3) and the valve seat (1) and between the valve ball (3) and the valve cap (2), and mounting grooves (7) for mounting the rubber pads (6) are respectively provided on the valve seat (1) and the valve cap (2), characterized in that: The end face of the mounting groove (7) protrudes outward to form an annular protrusion (8), and an annular groove (9) is formed between the annular protrusion (8) and the side wall of the mounting groove (7). The rubber pad (6) is provided with an annular notch (10) that matches the annular protrusion (8). One end of the rubber pad (6) near the end face of the mounting groove (7) is stuck in the annular groove (9). The inner side wall of the rubber pad (6) that contacts the valve ball (3) is an arc surface (11), and the arc surface (11) matches the valve ball (3).

2. A gas isolation valve according to claim 1, characterized in that: The lower end of the handle (5) is fitted onto the valve stem (4) and fixedly mounted on the valve stem (4) by a pin (12). The valve stem (4) has an assembly hole one (13) and the handle (5) has an assembly hole two (14). The pin (12) is interference-fitted with the assembly hole one (13) and the assembly hole two (14).

3. A gas isolation valve according to claim 2, characterized in that: The pin (12) includes a frustum section (12a) and a cylindrical section (12b). The diameter of the frustum section (12a) gradually decreases outward from the cylindrical section (12b), and the maximum diameter of the frustum section (12a) is equal to the diameter of the cylindrical section (12b). The taper of the frustum section (12a) is 1:6-1:

10. The frustum section (12a) accounts for 0.4-0.5 times the total length of the pin (12). The cylindrical section (12b) is interference-fitted with the first mounting hole (13) and the second mounting hole (14).

4. A gas isolation valve according to claim 2, characterized in that: The diameter of the pin (12) is 2mm, the lower deviation of the pin (12) diameter is +0.05mm and the upper deviation is +0.08mm, the diameter of the first assembly hole (13) and the second assembly hole (14) is 2mm, the lower deviation of the first assembly hole (13) and the second assembly hole (14) is -0.05mm and the upper deviation is 0.

5. A gas isolation valve according to claim 1, characterized in that: The valve seat (1) is provided with a limiting protrusion (15) to limit the valve cap (2).

6. A gas isolation valve according to claim 5, characterized in that: The valve cap (2) has an external thread on its outer periphery, and the valve seat (1) has an internal thread that matches the external thread. The valve seat (1) has a relief groove (16) at the end of the internal thread near the limiting protrusion (15).

7. A gas isolation valve according to claim 1, characterized in that: The upper end of the handle (5) is flat and oval.

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