High-pressure ball valve

Abstract

The utility model relates to the technical field of valves, in particular to a high-pressure ball valve which comprises a valve body, a valve cover, a valve rod and a ball core, two valve seat assemblies are arranged on the two sides, corresponding to the ball core, in the valve body respectively, and each valve seat assembly comprises a valve seat body and a first valve seat sleeve. The first valve seat sleeve is in threaded connection with the inner wall of the valve body through first external threads arranged on the outer wall, the valve seat body is sleeved with the first valve seat sleeve, the end, away from the first valve seat sleeve, of the valve seat body is in sealing fit with the ball core, and a moving gap is formed between the first valve seat sleeve and the valve body. The first valve seat sleeve capable of moving in the axial direction of the channel is arranged between the valve seat main body and the valve body, so that the valve seat main body is separated from the ball core, the valve seat main body and the ball core are convenient to disassemble for maintenance and replacement, and the valve seat main body and the ball core are separated from each other. And on-line maintenance is realized, the maintenance time is shortened, and the production continuity is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a high pressure ball valve. BACKGROUND

[0002] Ball valve, the opening and closing part is the ball body driven by the valve rod and rotates around the ball valve axis, and can be used for the adjustment and control of fluid, the valve in the pipeline should be generally installed horizontally, wherein the high pressure ball valve is a widely used ball valve, and the main feature is that the structure is compact, the reliability is high, and it is suitable for high pressure pipeline.

[0003] The prior art high pressure ball valve is usually installed on the pipeline in a welding connection mode, although the sealing reliability is improved, but the welding seam needs to be cut during the maintenance of the ball valve, the integrity of the pipeline is damaged, the maintenance time is prolonged, the whole system needs to be shut down during the maintenance, and the continuity of production is affected.

[0004] The utility model aims at the above-mentioned technical problem and proposes a corresponding solution. UTILITY MODEL CONTENT

[0005] The utility model discloses a high pressure ball valve that overcomes the shortcomings and deficiencies of the prior art, the first valve seat sleeve that can move along the axial direction of the channel is arranged between the valve seat main body and the valve body, so that the valve seat main body is separated from the ball core, is convenient for disassembling and maintaining and replacing, realizes on-line maintenance, shortens the maintenance time, and guarantees the continuity of production.

[0006] The utility model adopts the technical scheme as follows: a high pressure ball valve, including valve body, valve cover, valve rod and ball core, the valve cover is arranged at one end of the valve body, the inside of the valve body is equipped with the channel for medium flow, the ball core rotates and sets up in the channel, the valve rod penetrates the valve cover and is connected with the ball core, the inside of the valve body corresponds the both sides of the ball core and is equipped with a group of valve seat assemblies respectively, the valve seat assembly includes valve seat main body and first valve seat sleeve, the first valve seat sleeve is connected with the inner wall of the valve body through the first outer thread arranged on the outer wall, and the first valve seat sleeve is sleeved on the outside of the valve seat main body, the one end of the valve seat main body away from the first valve seat sleeve is sealed with the ball core, the first valve seat sleeve and the valve body are equipped with moving gap, the moving gap is used for the axial movement of the first valve seat sleeve along the channel, the outer wall of the first valve seat sleeve is also equipped with the first dismounting gap.

[0007] The first sealing ring and the disc spring are sequentially arranged between the first valve seat sleeve and the valve seat main body along the axial direction of the channel.

[0008] The valve seat assembly further comprises a second valve seat sleeve sleeved outside the first valve seat sleeve, the moving gap is located between the first valve seat sleeve and the second valve seat sleeve, the first valve seat sleeve is threadedly connected with the inner wall of the second valve seat sleeve through the first external thread, the outer wall of the second valve seat sleeve is provided with the second external thread, the second valve seat sleeve is threadedly connected with the inner wall of the valve body through the second external thread, and the outer wall of the second valve seat sleeve is provided with the second dismounting gap which is the same as the first dismounting gap.

[0009] The first valve seat sleeve and the second valve seat sleeve are in a stepped relative installation position, and the first dismounting gap is located at the outer edge of one end of the first valve seat sleeve extending to the outside of the second valve seat sleeve.

[0010] The valve body is provided with an opening for embedding the valve cover, and the second dismounting gap is located at the outer edge of one end of the second valve seat sleeve extending to the inside of the opening.

[0011] The inner wall of the second sealing ring is attached to the outer wall of the first valve seat sleeve, and the side wall of the second sealing ring is attached to the side wall of the second valve seat sleeve.

[0012] The second valve seat sleeve and the valve body are further provided with an elastic pressing ring.

[0013] The beneficial effects of the utility model are as follows: the utility model discloses a first valve seat sleeve is arranged between the valve seat body and the valve body, the first valve seat sleeve can move along the axial direction of the channel, the first dismounting gap is used for the tool to be clamped to rotate the first valve seat sleeve, and the moving gap provides that the first valve seat sleeve moves a distance in the direction away from the ball core, so that the valve seat body is separated from the ball core, the ball core, the valve seat body and the first valve seat sleeve can be sequentially dismounted from the connection between the valve cover and the valve body to carry out maintenance and replacement, on-line maintenance is realized, the maintenance time is shortened, and the continuity of production is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0015] Figure 1 It is the structural schematic diagram of the high-pressure ball valve of the utility model;

[0016] Figure 2 It is Figure 1 The local enlarged schematic view of A in the middle;

[0017] In the diagram, 1-valve body, 2-valve cover, 3-valve stem, 4-ball core, 5-channel, 6-valve seat body, 7-first valve seat sleeve, 8-first external thread, 9-movement clearance, 10-first disassembly notch, 11-first sealing ring, 12-disc spring, 13-second valve seat sleeve, 14-second external thread, 15-second disassembly notch, 16-opening, 17-second sealing ring, 18-elastic pressure ring. Detailed Implementation

[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0019] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0020] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] like Figures 1 to 2 As shown in the figure, a high-pressure ball valve is provided, comprising a valve body 1, a valve cover 2, a valve stem 3, and a ball core 4. The valve cover 2 is disposed at one end of the valve body 1. The valve body 1 has a channel 5 for medium flow inside. The ball core 4 is rotatably disposed in the channel 5. The valve stem 3 passes through the valve cover 2 and is connected to the ball core 4. A set of valve seat assemblies is provided on both sides of the ball core 4 inside the valve body 1. The valve seat assembly includes a valve seat body 6 and a first valve seat sleeve 7. The first valve seat sleeve 7 is threaded to the inner wall of the valve body 1 through a first external thread 8 on the outer wall, and the first valve seat sleeve 7 is sleeved outside the valve seat body 6. The end of the valve seat body 6 away from the first valve seat sleeve 7 is sealed to the ball core 4. A moving gap 9 is provided between the first valve seat sleeve 7 and the valve body 1. The moving gap 9 allows the first valve seat sleeve 7 to move axially along the channel 5. The outer wall of the first valve seat sleeve 7 is also provided with a first disassembly notch 10.

[0022] The beneficial effects of such arrangement are as follows: the first valve seat sleeve can be moved along the axial direction of the channel, the first dismounting gap is used for tool clamping to rotate the first valve seat sleeve, the tool can be, for example, a wrench, as long as it can clamp and rotate the first valve seat sleeve, the moving gap provides that the first valve seat sleeve moves a distance away from the ball core, so that the valve seat body is separated from the ball core, and the ball core, the valve seat body and the first valve seat sleeve can be sequentially dismounted from the connection between the valve cover and the valve body for maintenance and replacement, realizing online maintenance, shortening the maintenance time, ensuring the continuity of production, and when installing, rotating the first valve seat sleeve through the first external thread, moving the first valve seat sleeve towards the ball core, the valve seat body and the ball core are more fitted, and the sealing performance is better.

[0023] Further arrangement, the first valve seat sleeve 7 and the valve seat body 6 are provided with a first sealing ring 11 and a disc spring 12 arranged along the axial direction of the channel 5 in sequence.

[0024] The beneficial effects of such arrangement are as follows: the first valve seat sleeve can be moved along the axial direction of the channel, the first dismounting gap is used for tool clamping to rotate the first valve seat sleeve, the tool can be, for example, a wrench, as long as it can clamp and rotate the first valve seat sleeve, the moving gap provides that the first valve seat sleeve moves a distance away from the ball core, so that the valve seat body is separated from the ball core, and the ball core, the valve seat body and the first valve seat sleeve can be sequentially dismounted from the connection between the valve cover and the valve body for maintenance and replacement, realizing online maintenance, shortening the maintenance time, ensuring the continuity of production, and when installing, rotating the first valve seat sleeve through the first external thread, moving the first valve seat sleeve towards the ball core, the valve seat body and the ball core are more fitted, and the sealing performance is better.

[0025] Further arrangement, the valve seat assembly further comprises a second valve seat sleeve 13 sleeved outside the first valve seat sleeve 7, the moving gap 9 is located between the first valve seat sleeve 7 and the second valve seat sleeve 13, the first valve seat sleeve 7 is threadedly connected with the inner wall of the second valve seat sleeve 13 through the first external thread 8, the outer wall of the second valve seat sleeve 13 is provided with a second external thread 14, the second valve seat sleeve 13 is threadedly connected with the inner wall of the valve body 1 through the second external thread 14, and the outer wall of the second valve seat sleeve 13 is provided with a second dismounting gap 15 which has the same structure as the first dismounting gap 10.

[0026] The beneficial effects of such arrangement are as follows: the first valve seat sleeve is further sleeved with the second valve seat sleeve, the second valve seat sleeve is also detachably connected through the external thread, forming a multi-stage installation structure, realizing multi-stage adjustment, increasing the movable distance, and further splitting the accessories, so that a small accessory can be individually maintained and replaced, reducing the cost.

[0027] Further arrangement, the first valve seat sleeve 7 and the second valve seat sleeve 13 are in a stepped relative installation position, and the first dismounting gap 10 is located at the outer edge of one end of the first valve seat sleeve 7 extending to the outside of the second valve seat sleeve 13.

[0028] Further arrangement, the valve body 1 is provided with an opening 16 at the top end for embedding the valve cover 2, and the second dismounting gap 15 is located at the outer edge of one end of the second valve seat sleeve 13 extending to the inside of the opening 16.

[0029] The beneficial effects of such arrangement are as follows: the first valve seat sleeve and the second valve seat sleeve can rotate independently, the first disassembly gap and the second disassembly gap are located in the opening and do not interfere with each other, the first disassembly gap and the second disassembly gap can be seen from the opening after the valve cover is removed, and a tool is inserted from the opening to perform maintenance and disassembly.

[0030] Further arrangement, the inner wall of the valve body 1 is embedded with a second sealing ring 17, the inner wall of the second sealing ring 17 is in close contact with the outer wall of the first valve seat sleeve 7, and the side wall of the second sealing ring 17 is in close contact with the side wall of the second valve seat sleeve 13.

[0031] The beneficial effects of such arrangement are as follows: the second sealing ring is clamped between the valve body, the first valve seat sleeve and the second valve seat sleeve, and good sealing performance is provided for the two connecting parts, the second sealing ring is more firmly installed, and the dislocation resistance is high.

[0032] Further arrangement, the second valve seat sleeve 13 and the valve body 1 are further provided with an elastic pressing ring 18.

[0033] The beneficial effects of such arrangement are as follows: the elastic pressing ring provides elastic force of the second valve seat sleeve along the channel axis, the threaded connection of the second outer thread of the second valve seat sleeve is more compact, and the threaded jamming is avoided.

[0034] The above only discloses preferred embodiments of the utility model, and of course cannot limit the scope of the utility model, therefore equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

Claims

1. A high-pressure ball valve, comprising a valve body (1), a valve cover (2), a valve stem (3) and a ball core (4), the valve cover (2) is arranged at one end of the valve body (1), the valve body (1) is internally provided with a channel (5) for medium flow, the ball core (4) is rotatably arranged in the channel (5), the valve stem (3) penetrates the valve cover (2) and is connected with the ball core (4), characterized in that: The valve body (1) is internally provided with a set of valve seat assemblies on both sides of the ball core (4), the valve seat assemblies comprise a valve seat body (6) and a first valve seat sleeve (7), the first valve seat sleeve (7) is threadedly connected with the inner wall of the valve body (1) through the first external thread (8) arranged on the outer wall, and the first valve seat sleeve (7) is sleeved on the outer part of the valve seat body (6), the end of the valve seat body (6) away from the first valve seat sleeve (7) is sealingly matched with the ball core (4), the first valve seat sleeve (7) is provided with a moving gap (9) between the first valve seat sleeve (7) and the valve body (1), the moving gap (9) is used for the axial movement of the first valve seat sleeve (7) along the channel (5), and the outer wall of the first valve seat sleeve (7) is further provided with a first dismounting gap (10). ​ 2. The high-pressure ball valve according to claim 1, characterized in that: The first valve seat sleeve (7) and the valve seat body (6) are provided with a first sealing ring (11) and a disc spring (12) arranged in sequence along the axis of the channel (5).

3. The high pressure ball valve of claim 1, wherein: The valve seat assembly further comprises a second valve seat sleeve (13) sleeved on the outer part of the first valve seat sleeve (7), the moving gap (9) is located between the first valve seat sleeve (7) and the second valve seat sleeve (13), the first valve seat sleeve (7) is threadedly connected with the inner wall of the second valve seat sleeve (13) through the first external thread (8), the outer wall of the second valve seat sleeve (13) is provided with a second external thread (14), the second valve seat sleeve (13) is threadedly connected with the inner wall of the valve body (1) through the second external thread (14), and the outer wall of the second valve seat sleeve (13) is provided with a second dismounting gap (15) which is the same in structure as the first dismounting gap (10).

4. The high pressure ball valve according to claim 3, characterized in that: The first valve seat sleeve (7) and the second valve seat sleeve (13) are arranged in a stepped manner, and the first dismounting gap (10) is located at the outer edge of the end of the first valve seat sleeve (7) extending to the outer part of the second valve seat sleeve (13).

5. The high pressure ball valve according to claim 3, characterized in that: The valve body (1) is provided with an opening (16) at the top end for embedding the valve cover (2), and the second dismounting gap (15) is located at the outer edge of the end of the second valve seat sleeve (13) extending to the inner part of the opening (16).

6. The high pressure ball valve according to claim 3, characterized in that: The inner wall of the valve body (1) is embedded with a second sealing ring (17), the inner wall of the second sealing ring (17) is attached to the outer wall of the first valve seat sleeve (7), and the side wall of the second sealing ring (17) is attached to the side wall of the second valve seat sleeve (13).

7. The high pressure ball valve according to claim 3, characterized in that: The second valve seat sleeve (13) and the valve body (1) are further provided with an elastic pressing ring (18).

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