Semi-ball valve with novel composite sealing structure

Abstract

The utility model discloses a semi-ball valve with a novel composite sealing structure, which particularly relates to the technical field of semi-ball valves and comprises a valve seat, a valve body fixedly connected to the middle of the upper end of the valve seat, a valve cover arranged at the upper end of the valve body, a valve shaft arranged at the upper end of the valve cover, a valve clack fixedly connected to the lower end of the valve shaft and a first sealing ring fixedly connected to the lower end of the valve cover. The inner side of the third threaded hole is in threaded connection with a second nut, the upper end of the lower end cover is fixedly connected with a third sealing ring, and the left end and the right end of the valve seat are fixedly connected with flanges. According to the utility model, the first sealing ring and the third sealing ring which are made of rubber ensure the overall sealing performance of the valve body, and are combined with the second sealing ring made of carbon steel for use, so that the sealing performance of the valve body is enhanced and a closed cavity cannot be formed between the valve clack and the inner wall of the valve body in the rotating use process of the valve clack; and the service life of the valve body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hemispherical valves, in particular to a hemispherical valve with a new composite sealing structure. Background Art

[0002] Ball valves are not only simple in structure and have good sealing performance, but also have small volume, light weight, low material consumption, small installation size, small driving torque, easy operation, and easy to open and close quickly within a certain nominal diameter range. They are one of the valve varieties that have developed rapidly in the past decade. Ball valves are widely used, and the variety and quantity of use are still expanding. They are developing in the direction of high temperature, high pressure, large diameter, high sealing, long life, excellent adjustment performance and multi-function of one valve. Their reliability and other performance indicators have reached a high level, and they have partially replaced gate valves, stop valves, and throttle valves.

[0003] In actual use, although the flow resistance of the ball valve is relatively small, the ball is easy to form a closed cavity with the valve body during the opening process, which is not conducive to the movement of the valve and may even cause obstruction and damage to the valve, with high maintenance costs. In addition, most of the existing semi-ball valves use a metal hard sealing structure. When the pipeline pressure is high, it is difficult to ensure zero leakage in the forward seal, and the reverse sealing performance is also poor.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a hemispherical valve with a new composite sealing structure is proposed. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a semi-ball valve with a new composite sealing structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hemispherical valve with a new composite sealing structure, including a valve seat, a valve body is fixedly connected to the middle of the upper end of the valve seat, a valve cover is arranged on the upper end of the valve body, a valve shaft is arranged on the upper end of the valve cover, a valve disc is fixedly connected to the lower end of the valve shaft, a first sealing ring is fixedly connected to the lower end of the valve cover, a second sealing ring is fixedly connected to the right end of the valve disc, a lower end cover is arranged on the lower end of the valve body, a rotating shaft is fixedly connected to the upper end of the lower end cover, a third threaded hole is arranged on the lower end of the lower end cover, a second nut is threadedly connected to the inner side of the third threaded hole, a third sealing ring is fixedly connected to the upper end of the lower end cover, and flanges are fixedly connected to the left and right ends of the valve seat.

[0007] As a further description of the above technical solution:

[0008] The four sides of the upper end of the valve cover are provided with first threaded holes, and the inner side of the first threaded hole is threadedly connected with a first nut.

[0009] The valve cover is fixedly mounted on the valve body by utilizing the rotational cooperation between the first nut and the inner sides of the first threaded hole and the second threaded hole, and the sealing performance of the valve body is ensured in cooperation with the first sealing ring.

[0010] As a further description of the above technical solution:

[0011] The four corners of the upper end of the valve body are provided with second threaded holes, and the inner sides of the second threaded holes are threadedly connected with first nuts.

[0012] The valve cover can be disassembled by rotationally engaging the first nut with the first threaded hole and the second threaded hole, thereby facilitating subsequent inspection and maintenance of the valve disc.

[0013] As a further description of the above technical solution:

[0014] The upper end of the valve cover is fixedly connected with a sleeve, and the inner side of the sleeve is slidably matched with the valve shaft.

[0015] Twisting the valve shaft drives the valve disc fixedly connected to the lower end of the valve shaft to rotate around the rotating shaft fixedly connected to the lower end cover, and the second sealing ring fixedly connected to the right end of the valve disc slides closely against the inner wall of the valve body.

[0016] As a further description of the above technical solution:

[0017] A through hole is arranged at the lower end of the valve flap, and the inner side of the through hole is rotatably matched with the upper end of the rotating shaft.

[0018] The through hole at the lower end of the valve disc is slidably matched with the rotating shaft. When the valve disc is working, it rotates around the rotating shaft as the center, thereby assisting the positioning of the valve disc during work.

[0019] As a further description of the above technical solution:

[0020] A fourth threaded hole is provided at the lower end of the valve body, and the inner side of the fourth threaded hole is rotationally matched with the upper end of the second nut.

[0021] The lower end cover is fixedly connected to the lower end of the valve body through the rotational cooperation between the second nut and the inner sides of the third threaded hole and the fourth threaded hole.

[0022] As a further description of the above technical solution:

[0023] The first sealing ring and the third sealing ring are made of rubber, and the second sealing ring is made of carbon steel.

[0024] The first sealing ring and the third sealing ring ensure the sealing performance of the valve body when it is in use. The use of the third sealing ring ensures that no enclosed space is formed between the valve disc and the inner wall of the valve body.

[0025] The utility model has the following beneficial effects:

[0026] 1. In the utility model, the valve disc fixedly connected at its lower end is driven to rotate around the rotating shaft fixedly connected at the upper end of the lower end cover by rotating the valve shaft. With the second sealing ring close to the inner wall of the valve body, an internal closed cavity will not be formed, so that the ball valve will not be obstructed during use, the inner wall of the valve body will not be damaged, and the service life of the ball valve will be extended.

[0027] 2. In the utility model, the sealing performance of the ball valve during use is ensured by using a first sealing ring and a third sealing ring made of rubber on the valve cover and the lower end cover, and a second sealing ring made of carbon steel, thereby solving the problem that it is difficult to ensure zero leakage in the forward seal and the reverse sealing performance is also poor when the pipeline pressure is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of a hemispherical valve with a new composite sealing structure proposed by the utility model;

[0029] Figure 2 An exploded view of a hemispherical valve with a new composite sealing structure proposed by the utility model;

[0030] Figure 3 This is a sectional view of the valve body of a hemispherical valve with a new composite sealing structure proposed by the utility model;

[0031] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0032] Legend:

[0033] 1. Valve seat; 2. Valve body; 21. Second threaded hole; 22. Fourth threaded hole; 3. Valve cover; 31. First threaded hole; 32. First nut; 33. First sealing ring; 34. Sleeve; 4. Valve shaft; 5. Valve disc; 51. Second sealing ring; 52. Through hole; 6. Lower end cover; 61. Third threaded hole; 62. Second nut; 63. Third sealing ring; 7. Rotating shaft; 8. Flange. DETAILED DESCRIPTION

[0034] Reference Figure 1-4, the utility model provides an embodiment: a hemispherical valve with a new composite sealing structure, including a valve seat 1, a valve body 2 is fixedly connected to the middle of the upper end of the valve seat 1, a valve cover 3 is arranged on the upper end of the valve body 2, a valve shaft 4 is arranged on the upper end of the valve cover 3, a valve disc 5 is fixedly connected to the lower end of the valve shaft 4, a first sealing ring 33 is fixedly connected to the lower end of the valve cover 3, and a second sealing ring 51 is fixedly connected to the right end of the valve disc 5. When the flow rate of the liquid is controlled, the valve shaft 4 is twisted, and the valve shaft 4 slides inside the sleeve 34 on the valve cover 3, driving the valve disc 5 fixedly connected to its lower end to rotate around the rotating shaft 7 fixedly connected to the upper end of the lower end cover 6 as the center of the circle. At this time, the valve disc 5 has a right end fixedly connected The right side of the second sealing ring 51 made of carbon steel is slidably matched with the inner wall of the valve body 2 to ensure that no enclosed space is formed between the valve disc 5 and the inner wall of the valve body 2, thereby not blocking the use of the raft disc, not damaging the internal structure of the valve body 2, and extending its service life. A lower end of the valve body 2 is provided with a lower end cover 6, and the upper end of the lower end cover 6 is fixedly connected to a rotating shaft 7, and a third threaded hole 61 is provided at the lower end of the lower end cover 6, and a second nut 62 is threadedly connected to the inner side of the third threaded hole 61, and a third sealing ring 63 is fixedly connected to the upper end of the lower end cover 6, and flanges 8 are fixedly connected to the left and right ends of the valve seat 1, and the flanges 8 fixedly connected to the left and right ends of the valve seat 1 are installed on the external water pipe.

[0035] The four sides of the upper end of the valve cover 3 are provided with first threaded holes 31, and the inner side of the first threaded hole 31 is threadedly connected with a first nut 32. The four corners of the upper end of the valve body 2 are provided with second threaded holes 21, and the inner side of the second threaded hole 21 is threadedly connected with the first nut 32. The upper end of the valve cover 3 is fixedly connected with a sleeve 34, and the inner side of the sleeve 34 is slidably matched with the valve shaft 4. The lower end of the valve disc 5 is provided with a through hole 52, and the inner side of the through hole 52 is rotationally matched with the upper end of the rotating shaft 7. The lower end of the valve body 2 is provided with a fourth threaded hole 22, and the inner side of the fourth threaded hole 22 is rotationally matched with the upper end of the second nut 62. The first sealing ring 33 and the third sealing ring 63 are made of rubber. When the service life is long, the internal structure of the ball valve needs to be inspected and repaired. At this time, the lower end cover 6 is removed by rotating the second nut 62 and the inner sides of the third threaded hole 61 and the fourth threaded hole 22, so that the rotating shaft 7 is removed. There is no restriction on the valve disc 5. The third sealing ring 63 is taken out to check whether it is damaged. Then the valve cover 3 is removed by rotating the first nut 32 and the inner sides of the first threaded hole 31 and the second threaded hole 21 to check whether the first sealing ring 33 is damaged. The first sealing ring 33 and the third sealing ring 63 play a sealing role when the valve body 1 is in use. The second sealing ring 51 is made of carbon steel.

[0036] Working principle: Install the flanges 8 fixedly connected at the left and right ends of the valve seat 1 on the external water pipe. When controlling the flow rate of the liquid, turn the valve shaft 4, which slides inside the sleeve 34 on the valve cover 3, driving the valve disc 5 fixedly connected at its lower end to rotate around the rotating shaft 7 fixedly connected at the upper end of the lower end cover 6. At this time, the valve disc 5 has a second carbon steel sealing ring 51 fixedly connected at the right end to slide with the inner wall of the valve body 2 on the right side to ensure that no enclosed space is formed between the valve disc 5 and the inner wall of the valve body 2, thereby not blocking the use of the raft disc and not damaging the internal structure of the valve body 2, thereby extending its service life. When the service life is long, the internal structure of the ball valve needs to be cleaned. The structure is inspected and repaired. At this time, the lower end cover 6 is removed by the rotational cooperation between the second nut 62 and the inner sides of the third threaded hole 61 and the fourth threaded hole 22, so that the rotating shaft 7 is disassembled, and there is no restriction on the valve disc 5. The third sealing ring 63 is taken out to check whether it is damaged. Then the valve cover 3 is removed by the rotational cooperation between the first nut 32 and the inner sides of the first threaded hole 31 and the second threaded hole 21, and the first sealing ring 33 is checked for damage. The first sealing ring 33 and the third sealing ring 63 play a sealing role when the valve body 1 is in use, and then cooperate with the use of the second sealing ring 51 to achieve a composite sealing effect to ensure that the liquid does not leak out of the ball valve when it is in use.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hemispherical valve with a novel composite sealing structure, comprising a valve seat (1), characterized in that: A valve body (2) is fixedly connected to the middle of the upper end of the valve seat (1), a valve cover (3) is provided at the upper end of the valve body (2), a valve shaft (4) is provided at the upper end of the valve cover (3), a valve flap (5) is fixedly connected to the lower end of the valve shaft (4), a first sealing ring (33) is fixedly connected to the lower end of the valve cover (3), a second sealing ring (51) is fixedly connected to the right end of the valve flap (5), a lower end cover (6) is provided at the lower end of the valve body (2), a rotating shaft (7) is fixedly connected to the upper end of the lower end cover (6), a third threaded hole (61) is provided at the lower end of the lower end cover (6), a second nut (62) is threadedly connected to the inner side of the third threaded hole (61), a third sealing ring (63) is fixedly connected to the upper end of the lower end cover (6), and flanges (8) are fixedly connected to the left and right ends of the valve seat (1).

2. A hemispherical valve with a new composite sealing structure according to claim 1, characterized in that: The four sides of the upper end of the valve cover (3) are provided with first threaded holes (31), and the inner side of the first threaded hole (31) is threadedly connected with a first nut (32).

3. According to claim 1, a hemispherical valve with a new composite sealing structure is characterized in that: Second threaded holes (21) are provided at four corners of the upper end of the valve body (2), and a first nut (32) is threadedly connected inside the second threaded hole (21).

4. A hemispherical valve with a new composite sealing structure according to claim 1, characterized in that: The upper end of the valve cover (3) is fixedly connected with a sleeve (34), and the inner side of the sleeve (34) is slidably matched with the valve shaft (4).

5. The hemispherical valve with a new composite sealing structure according to claim 1 is characterized in that: The lower end of the valve flap (5) is provided with a through hole (52), and the inner side of the through hole (52) is rotatably matched with the upper end of the rotating shaft (7).

6. The hemispherical valve with a new composite sealing structure according to claim 1 is characterized in that: A fourth threaded hole (22) is provided at the lower end of the valve body (2), and the inner side of the fourth threaded hole (22) is rotatably matched with the upper end of the second nut (62).

7. The hemispherical valve with a new composite sealing structure according to claim 1 is characterized in that: The first sealing ring (33) and the third sealing ring (63) are made of rubber, and the second sealing ring (51) is made of carbon steel.

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