V-shaped sealing ball valve

Abstract

The utility model relates to a V-shaped sealing ball valve, which comprises a valve body, a valve core, a valve core and a valve core, the valve seat is installed on the side face of the valve body, and the sealing side of the valve seat is tightly matched with the V-shaped ball. A first sealing assembly is arranged on the side, away from the V-shaped ball body, of the valve seat. The bottom shaft penetrates through one side of the valve body and is connected with the lower end face of the V-shaped ball body; the valve rod penetrates through the other side of the valve body, the valve rod and the bottom shaft are coaxially arranged, the valve rod is connected with the upper end face of the V-shaped ball body, and a second sealing assembly is arranged between the outer wall face of the valve rod and the valve body. Compared with the prior art, the V-shaped sealing ball valve has the advantages that fit clearances of the valve seat, the valve body and the V-shaped ball body are effectively sealed through the first sealing assembly arranged on the side, away from the V-shaped ball body, of the valve seat; the fit clearance of the valve rod, the valve body and the V-shaped ball body is effectively sealed through the second sealing assembly arranged between the outer wall face of the valve rod and the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a V-shaped sealing ball valve. Background Art

[0002] V-type ball valve is a fixed ball valve and a single-seat sealed ball valve. It has the best regulating performance among ball valves, and its flow characteristic is equal percentage, with an adjustable ratio of 100:1. There is a shearing effect between the V-shaped cut on the ball and the metal seat, which is particularly suitable for use on pipelines containing media such as fibers, tiny solid particles, and slurry.

[0003] Chinese patent CN201821663932.4 discloses a hard-sealed oxygen-specific ball valve seat structure, including a main valve body, a ball body is arranged on one side of the main valve body, a side valve body is arranged on one side of the ball body, a pressure ring is arranged on the main valve body, a sealing ring is arranged at the connection between the main valve body and the pressure ring, a limited valve seat is arranged on one side of the sealing ring, a spring is arranged at the bottom end of the pressure ring, and a thrust pad is arranged at the connection between the limited valve seat and the sealing ring; a discharge hole is arranged on the side ball body to balance the pressure in the valve cavity and avoid the generation of adiabatic compression when the valve is opened. Secondly, a sealing pad is arranged on the hard-sealed oxygen-specific ball valve seat structure, and a thrust pad is designed on the back of the sealing ring. The part where the thrust pad contacts the back of the limited valve seat is designed to be concave, and a certain number of grooves are processed, so as to help the medium pressure better enter the back of the limited valve seat, and effectively improve the preload force of the limited valve seat. However, due to the inadequate sealing measures, the valve seat structure still has the defect of poor sealing performance in actual use. Utility Model Content

[0004] The purpose of the utility model is to provide a V-shaped sealed ball valve in order to overcome at least one of the defects of the above-mentioned prior art. The sealed ball valve realizes effective sealing of the matching gap between the valve seat, valve body and V-shaped ball by a first sealing component arranged on the side of the valve seat away from the V-shaped ball; and realizes effective sealing of the matching gap between the valve stem, valve body and V-shaped ball by a second sealing component arranged between the outer wall of the valve stem and the valve body.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A V-shaped sealing ball valve, comprising:

[0007] The valve body is provided with a V-shaped ball;

[0008] A valve seat is installed on the side of the valve body, and its sealing side is tightly matched with the V-shaped ball; a first sealing component is provided on the side of the valve seat away from the V-shaped ball;

[0009] A bottom shaft that passes through one side of the valve body and is connected to the lower end surface of the V-shaped ball;

[0010] The valve stem that passes through the other side of the valve body is coaxially arranged with the bottom shaft and connected to the upper end surface of the V-shaped sphere. A second sealing component is arranged between the outer wall surface of the valve stem and the valve body.

[0011] Furthermore, the first sealing assembly includes a clamping nut and a disc spring; the clamping nut is screwed into between the valve seat and the valve body, and a disc spring is provided at the position where the clamping nut abuts against the end surface of the valve seat.

[0012] Furthermore, the first sealing assembly also includes an O-ring, and the O-ring is sleeved on the outer wall surface of the valve seat between the disc spring and the V-shaped ball.

[0013] Furthermore, the second sealing assembly includes a packing and a packing pressure plate; the packing is arranged between the valve stem and the valve body; the packing pressure plate is sleeved on the valve stem to compress the packing.

[0014] Furthermore, the second sealing assembly also includes a first sleeve, which is sleeved on the stem of the valve stem between the packing and the V-shaped ball.

[0015] Furthermore, the second sealing assembly also includes a packing pressing sleeve, and the packing pressing sleeve is sleeved on the stem of the valve stem between the packing pressing plate and the packing.

[0016] Furthermore, the packing pressure plate is connected to the valve body via bolts.

[0017] Furthermore, an adjustment sheet is sleeved on the outer wall of the bottom shaft; and a screw plug is screwed on one end of the bottom shaft away from the V-shaped sphere.

[0018] Furthermore, a screw plug gasket is provided at the abutment portion between the screw plug and the valve body.

[0019] Furthermore, a second shaft sleeve is sleeved on the rod body whose bottom shaft is located between the adjustment sheet and the V-shaped sphere.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] (1) The utility model provides a V-shaped sealing ball valve, which realizes effective sealing of the matching gap between the valve seat, valve body and V-shaped ball by means of a first sealing component arranged on the side of the valve seat away from the V-shaped ball; and realizes effective sealing of the matching gap between the valve stem, valve body and V-shaped ball by means of a second sealing component arranged between the outer wall surface of the valve stem and the valve body.

[0022] (2) The utility model provides a V-shaped sealing ball valve, wherein the compression nut, disc spring, O-ring, valve seat and V-shaped ball of the sealing ball valve form a sealing combination, and the disc spring activates the pre-tightening thrust to ensure reliable sealing.

[0023] (3) The utility model provides a V-shaped sealing ball valve, wherein a valve stem, a first shaft sleeve, a V-shaped ball, a packing, a packing gland and a packing pressure plate form a sealing assembly, and the valve stem and the V-shaped ball are matched with each other through a round pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of a V-shaped sealing ball valve in an embodiment;

[0025] Figure 2 It is a front view of the V-shaped sealing ball valve in the embodiment;

[0026] Figure 3 for Figure 1 A partial view of the first sealing assembly;

[0027] As shown in the figure, the numbers are as follows: 1-screw plug; 2-screw plug gasket; 3-adjusting plate; 4-valve body; 5-bottom shaft; 6-second shaft sleeve; 7-V-shaped ball; 8-valve seat; 9-O-ring; 10-butterfly spring; 11-pressure nut; 12-first shaft sleeve; 13-valve stem; 14-packing; 15-packing sleeve; 16-packing plate; 17-stud; 18-nut. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments. Example

[0029] See also Figure 1-3 , a V-type sealing ball valve, comprising:

[0030] The valve body 4 is provided with a V-shaped ball 7;

[0031] The valve seat 8 is installed on the side of the valve body 4, and its sealing side is tightly matched with the V-shaped ball 7; the first sealing component is provided on the side of the valve seat 8 away from the V-shaped ball 7;

[0032] A bottom shaft 5 passing through one side of the valve body 4 and connected to the lower end surface of the V-shaped ball 7;

[0033] The valve stem 13 passing through the other side of the valve body 4 is coaxially arranged with the bottom shaft 5 and connected to the upper end surface of the V-shaped sphere 7 . A second sealing component is arranged between the outer wall surface of the valve stem 13 and the valve body 4 .

[0034] Please refer to Figure 1 , Figure 3In this embodiment, the first sealing assembly includes a clamping nut 11, a disc spring 10 and an O-ring 9; the clamping nut 11 is screwed into between the valve seat 8 and the valve body 4, and a disc spring 10 is provided at the position where the clamping nut 11 abuts against the end face of the valve seat 8; the O-ring 9 is sleeved on the outer wall surface of the valve seat 8 between the disc spring 10 and the V-shaped ball 7.

[0035] Please refer to Figure 1 In this embodiment, the second sealing assembly includes a packing 14, a packing pressure plate 16, a first sleeve 12 and a packing pressure sleeve 15; the packing 14 is arranged between the valve stem 13 and the valve body 4; the packing pressure plate 16 is sleeved on the valve stem 13 to compress the packing 14; the first sleeve 12 is sleeved on the stem of the valve stem 13 between the packing 14 and the V-shaped ball 7; the packing pressure sleeve 15 is sleeved on the stem of the valve stem 13 between the packing 14 and the V-shaped ball 7, and the packing pressure sleeve 15 is sleeved on the stem of the valve stem 13 between the packing pressure plate 16 and the packing 14, and the packing pressure plate 16 is connected to the valve body 4 by bolts.

[0036] Please refer to Figure 1 In this embodiment, an adjustment sheet 3 is sleeved on the outer wall of the bottom shaft 5; a screw plug 1 is screwed on the end of the bottom shaft 5 away from the V-shaped sphere 7, a screw plug pad 2 is provided at the contact point between the screw plug 1 and the valve body 4, and a second shaft sleeve 6 is sleeved on the rod body of the bottom shaft 5 between the adjustment sheet 3 and the V-shaped sphere 7.

[0037] Working principle:

[0038] The clamping nut 11, disc spring 10, O-ring 9, valve seat 8 and V-shaped ball 7 of the V-shaped sealing ball valve of this embodiment form a first sealing assembly. The disc spring 10 activates the pre-tightening thrust to ensure reliable sealing. The disc spring 10 is a component for applying pre-tightening force. It can be personalized according to the force to be applied and the size of the space volume, and can be replaced individually when some spring leaves fail, which is very convenient.

[0039] The valve stem 13, the first shaft sleeve 12, the V-shaped ball 7, the packing 14, the packing gland 15 and the packing plate 16 of the V-shaped sealing ball valve of this embodiment form a second sealing assembly, and the valve stem 13 and the V-shaped ball 7 are matched with each other through a round pin.

[0040] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A V-shaped sealing ball valve, characterized in that: include: A valve body (4) having a V-shaped ball (7) disposed therein; A valve seat (8) is mounted on the side of the valve body (4), and its sealing side is tightly matched with the V-shaped ball (7); a first sealing component is provided on the side of the valve seat (8) facing away from the V-shaped ball (7); A bottom shaft (5) passing through one side of the valve body (4) and connected to the lower end surface of the V-shaped ball (7); A valve stem (13) passes through the other side of the valve body (4), is coaxially arranged with the bottom shaft (5), and is connected to the upper end surface of the V-shaped sphere (7). A second sealing component is provided between the outer wall surface of the valve stem (13) and the valve body (4).

2. A V-shaped sealing ball valve according to claim 1, characterized in that: The first sealing assembly comprises a compression nut (11) and a disc spring (10); The clamping nut (11) is screwed into between the valve seat (8) and the valve body (4), and a disc spring (10) is provided at the position where the clamping nut abuts against the end surface of the valve seat (8).

3. A V-shaped sealing ball valve according to claim 2, characterized in that: The first sealing assembly further comprises an O-ring (9), wherein the O-ring (9) is sleeved on the outer wall surface of the valve seat (8) between the disc spring (10) and the V-shaped ball (7).

4. A V-shaped sealing ball valve according to claim 1, characterized in that: The second sealing assembly comprises a packing (14) and a packing pressure plate (16); The packing (14) is arranged between the valve stem (13) and the valve body (4); the packing pressure plate (16) is sleeved on the valve stem (13) and is used to press the packing (14).

5. A V-shaped sealing ball valve according to claim 4, characterized in that: The second sealing assembly further comprises a first shaft sleeve (12), wherein the first shaft sleeve (12) is sleeved on the stem of the valve stem (13) between the packing (14) and the V-shaped ball (7).

6. A V-shaped sealing ball valve according to claim 4, characterized in that: The second sealing assembly further comprises a packing pressing sleeve (15), wherein the packing pressing sleeve (15) is sleeved on the stem of the valve stem (13) between the packing pressing plate (16) and the packing (14).

7. A V-shaped sealing ball valve according to claim 4, characterized in that: The packing pressure plate (16) is connected to the valve body (4) via bolts.

8. A V-shaped sealing ball valve according to claim 1, characterized in that: An adjustment sheet (3) is sleeved on the outer wall of the bottom shaft (5); a screw plug (1) is screwed onto one end of the bottom shaft (5) that is away from the V-shaped sphere (7).

9. A V-shaped sealing ball valve according to claim 8, characterized in that: A screw plug gasket (2) is provided at the abutment portion between the screw plug (1) and the valve body (4).

10. A V-shaped sealing ball valve according to claim 8, characterized in that: The bottom shaft (5) is located between the adjustment plate (3) and the V-shaped sphere (7) and a second shaft sleeve (6) is sleeved on the shaft.

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