Top-mounted ball valve

Abstract

The utility model discloses a top-mounted ball valve, which relates to the technical field of pipeline valves, and comprises an outer valve body, an inner part assembly and a valve cover assembly, a first cavity is arranged in the outer valve body, the inner part assembly is assembled in the first cavity, the valve cover assembly is detachably arranged at the top of the outer valve body, and the inner part assembly is assembled in the first cavity. When the valve cover assembly is disassembled, the inner part combination body can be taken out from the outer valve body; wherein the inner part assembly comprises an inner valve body, valve seats and a ball body, a second cavity is formed in the inner valve body, the ball body is arranged in the second cavity, and the valve seats are arranged on the two sides of the ball body for supporting. Parts such as the ball body and the valve seat can be quickly disassembled and assembled, and the maintenance and replacement time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valves, in particular to a top-mounted ball valve. Background Art

[0002] The top-mounted ball valve is widely used in oil and natural gas pipelines, as well as in devices such as oil production, oil refining, petrochemical, chemical, chemical fiber, metallurgy, electric power, nuclear power, food and papermaking. Among them, the top-mounted ball valve can be disassembled simply and quickly on the pipeline, and the maintenance is convenient and fast. Specifically, when the top-mounted ball valve fails and needs to be repaired on the pipeline, it is not necessary to disassemble the entire valve from the pipeline. Only the valve cover bolts and nuts need to be removed, and the combination of the valve cover and the valve stem and other parts can be taken off from the valve body together, and then the ball and the valve seat and other parts can be taken out to repair the ball and the valve seat and other parts online.

[0003] In the existing top-mounted ball valve, the ball is wrapped by the valve seats on both sides. To install or remove the ball, the valve seats on both sides must be pushed away in the left and right directions of the center plane of the ball, so that the distance between the two valve seats is greater than the length of the left and right sides when the ball is in the open position.

[0004] Currently, the distance between the two valve seats is usually adjusted by rotating the adjusting nut. However, due to the small internal space of the valve, rotating the adjusting nut is time-consuming and laborious, and does not meet the requirements of quick disassembly and assembly.

[0005] Therefore, a top-mounted ball valve is provided to solve the above problems existing in the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a top-mounted ball valve to solve the above problems existing in the prior art, which can realize the quick disassembly and assembly of parts such as the ball and the valve seat, and shorten the maintenance and replacement time.

[0007] To achieve the above purpose, the utility model provides the following scheme:

[0008] The utility model provides a top-mounted ball valve, which includes an outer valve body, an inner part assembly and a valve cover assembly. A first cavity is arranged in the outer valve body. The inner part assembly is assembled in the first cavity. The valve cover assembly is detachably arranged at the top of the outer valve body. When the valve cover assembly is removed, the inner part assembly can be taken out from the outer valve body. Wherein, the inner part assembly includes an inner valve body, a valve seat and a ball. A second cavity is arranged in the inner valve body. The ball is arranged in the second cavity, and the valve seats are arranged on both sides of the ball for support.

[0009] Preferably, the valve seats on both sides of the sphere are a first valve seat and a second valve seat respectively. A first groove is provided on one side of the inner valve body. The sealing surface of the first valve seat faces the sphere, and one end opposite to the sealing surface extends into the first groove. An inlet passage is provided on the other side of the inner valve body for the sphere to enter. The inner component assembly further includes a valve seat support disposed in the inlet passage, and a second groove is provided on the valve seat support. The sealing surface of the second valve seat faces the sphere, and one end opposite to the sealing surface extends into the second groove.

[0010] Preferably, a sealing ring is provided between one end of the first valve seat extending into the first groove and the side wall of the first groove. A first disc spring is also sleeved on the first valve seat. Wherein, a first limiting protrusion is provided on the side wall of the first valve seat, and the first disc spring abuts between the first limiting protrusion and the side wall of the inner valve body;

[0011] A sealing ring is provided between one end of the second valve seat extending into the second groove and the side wall of the second groove. A first disc spring is also sleeved on the second valve seat. Wherein, a second limiting protrusion is provided on the side wall of the second valve seat, and the first disc spring abuts between the second limiting protrusion and the side wall of the valve seat support;

[0012] A sealing ring is provided between the valve seat support and the inner wall of the inlet passage.

[0013] Preferably, the inner component assembly further includes a pressing ring for pressing on the side of the valve seat support away from the second valve seat. Wherein, the pressing ring is a threaded pressing ring and is threadedly connected in the inlet passage.

[0014] Preferably, the inner component assembly further includes a support shaft. A support shaft passage is also provided at the bottom of the inner valve body. The support shaft passes through the support shaft passage and is fixedly connected to the inner valve body. Wherein, a round hole is provided at the bottom of the sphere, and the support shaft extends into the round hole so that the sphere can rotate around the support shaft.

[0015] Preferably, a lifting structure is also provided at the top of the inner valve body for lifting. Wherein, the lifting structure includes a lifting threaded hole for threadedly connecting a lifting screw, and a plurality of lifting threaded holes are provided, and the plurality of lifting threaded holes are distributed along the circumferential direction of the inner valve body.

[0016] Preferably, the inner side walls on both sides of the first cavity are inclined inward from top to bottom, and the side walls on both sides of the inner valve body are inclined inward from top to bottom. Sealing rings are also embedded on both sides of the inner valve body.

[0017] Preferably, the valve cover assembly includes a valve cover and a valve stem. The valve cover is detachably arranged at the top of the outer valve body. The valve stem is arranged in the middle of the valve cover and penetrates through the valve cover along the thickness direction of the valve cover. A limiting hole is provided at the top of the sphere, and the bottom end of the valve stem extends into the limiting hole so that the valve stem can drive the sphere to rotate.

[0018] Preferably, a limiting boss is further provided on the lower end surface of the valve cover, and the limiting boss is attached to the upper end surface of the inner part assembly.

[0019] Preferably, the bottom of the valve stem is rotatably connected to the valve cover through a bushing;

[0020] A sealing groove is further provided on the top of the valve cover. A graphite packing ring is arranged in the sealing groove. The graphite packing ring is sleeved on the valve stem, and the top of the graphite packing ring is pressed by a sealing ring. The valve cover assembly further includes a gland. The gland is arranged on the top of the valve cover and sleeved on the valve stem. A second disc spring is arranged in the gland for pressing the sealing ring.

[0021] The utility model has achieved the following technical effects compared with the prior art:

[0022] In the utility model, parts such as the valve seat and the sphere are integrated on the inner valve body to form an inner part assembly, and the inner part assembly is assembled in the outer valve body. When parts such as the valve seat and the sphere fail and need to be repaired, only the valve cover assembly needs to be removed, and then the inner part assembly can be taken out of the outer valve body as a whole and sent to a repair workshop for repair or replacement. Therefore, the quick disassembly and assembly of parts such as the sphere and the valve seat can be realized, and the repair and replacement time can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the top-mounted ball valve in the embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the inner part assembly in the embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the top-mounted ball valve in the embodiment of the present invention.

[0027] In the figure: 1 - outer valve body, 2 - inner valve body, 3 - support shaft, 4 - valve seat, 5 - sphere, 6 - first disc spring, 7 - threaded compression ring, 8 - valve seat support, 9 - bushing, 10 - valve cover, 11 - graphite packing ring, 12 - sealing ring, 13 - second disc spring, 14 - gland, 15 - valve stem, 16 - lifting eye bolt. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The purpose of the present invention is to provide a top-mounted ball valve to solve the problems existing in the above-mentioned prior art, and it can realize the quick disassembly and assembly of parts such as the sphere and the valve seat, and shorten the maintenance and replacement time.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Embodiment 1

[0032] As Figures 1-3 shown, in this embodiment, a top-mounted ball valve is provided, which includes an outer valve body 1, an inner part assembly, and a valve cover assembly. A first cavity is provided inside the outer valve body 1, and the inner part assembly is assembled in the first cavity. The top of the first cavity is open to facilitate the insertion or removal of the inner part assembly. The valve cover assembly is detachably provided on the top of the outer valve body 1. When the valve cover assembly is removed, the inner part assembly can be taken out from the outer valve body 1. Among them, the inner part assembly includes an inner valve body 2, a valve seat 4, and a sphere 5. A second cavity is provided inside the inner valve body 2, the sphere 5 is provided in the second cavity, and the valve seat 4 is provided on both sides of the sphere 5 for support.

[0033] In this embodiment, parts such as the valve seat 4 and the sphere 5 are integrated on the inner valve body 2 to form an inner part assembly, and the inner part assembly is assembled inside the outer valve body 1. When parts such as the valve seat 4 and the sphere 5 fail and need to be repaired, only the valve cover assembly needs to be removed, and then the inner part assembly can be taken out from the outer valve body 1 as a whole and sent to the repair workshop for repair or replacement. Thus, the quick disassembly and assembly of parts such as the sphere 5 and the valve seat 4 can be realized, and the maintenance and replacement time can be shortened.

[0034] In this embodiment, as Figure 2As shown, the valve seats 4 on both sides of the sphere 5 are respectively a first valve seat and a second valve seat. A first groove is provided on the right side of the inner valve body 2. The sealing surface of the first valve seat faces the sphere 5, and one end opposite to the sealing surface extends into the first groove. An inlet passage is provided on the left side of the inner valve body 2 for the sphere 5 to enter. Among them, the inlet passage is a circular passage, and its diameter is larger than the diameter of the sphere 5. The inner component assembly further includes a valve seat support 8. The valve seat support 8 is arranged in the inlet passage, and a second groove is provided on the valve seat support 8. The sealing surface of the second valve seat faces the sphere 5, and one end opposite to the sealing surface extends into the second groove.

[0035] In this embodiment, a sealing ring is provided between the end of the first valve seat extending into the first groove and the side wall of the first groove to prevent fluid leakage. A first disc spring 6 is also sleeved on the first valve seat. Among them, a first limit protrusion is provided on the side wall of the first valve seat, and the first disc spring 6 abuts between the first limit protrusion and the side wall of the inner valve body 2. Similarly, a sealing ring is provided between the end of the second valve seat extending into the second groove and the side wall of the second groove. A first disc spring 6 is also sleeved on the second valve seat. Among them, a second limit protrusion is provided on the side wall of the second valve seat, and the first disc spring 6 abuts between the second limit protrusion and the side wall of the valve seat support 8.

[0036] Furthermore, a sealing ring is also provided between the valve seat support 8 and the inner wall of the inlet passage to prevent fluid leakage.

[0037] It should be noted that in this embodiment, "left side" refers to Figure 2 the left hand side when facing the paper surface, and "right side" refers to Figure 2 the right hand side when facing the paper surface.

[0038] In this embodiment, the inner component assembly further includes a pressing ring for pressing on the side (i.e., the left side) of the valve seat support 8 away from the second valve seat. Among them, the pressing ring is preferably a threaded pressing ring 7, which is threadedly connected in the inlet passage.

[0039] In this embodiment, the inner component assembly further includes a support shaft 3. A support shaft passage is also provided at the bottom of the inner valve body 2. The support shaft 3 passes through the support shaft passage and is fixedly connected to the inner valve body 2, specifically by fastening screws, which is convenient for disassembly and assembly. Among them, a round hole is provided at the bottom of the sphere 5, and the support shaft 3 extends into the round hole so that the sphere 5 can rotate around the support shaft 3.

[0040] In this embodiment, a lifting structure is further provided at the top of the inner valve body 2 for lifting; wherein, the lifting structure includes a lifting threaded hole, and a lifting screw is threadedly connected to the lifting threaded hole for lifting the inner component assembly. A plurality of lifting threaded holes are provided, and the plurality of lifting threaded holes are circumferentially distributed along the inner valve body 2. Preferably, two lifting threaded holes are provided and are oppositely arranged.

[0041] The specific assembly process of the inner component assembly in this embodiment is as follows:

[0042] 1. Fit the first disc spring 6 onto the two valve seats 4, and fit the sealing ring into the corresponding groove of the valve seat 4;

[0043] 2. Install the first valve seat (including the sealing ring and the first disc spring 6) into the right side of the inner valve body 2, with the sealing surface of the first valve seat facing the sphere 5;

[0044] 3. Install the sphere 5. Among them, the sphere 5 must be installed from the left side to the right side along the inlet passage;

[0045] 4. Install the second valve seat (including the sealing ring and the second disc spring 13) into the inner valve body 2 from the left side to the right side. The sealing surface of the second valve seat faces the sphere 5 and fits with its spherical surface;

[0046] 5. Install the valve seat support 8 into the inner valve body 2 from left to right;

[0047] 6. Install the threaded compression ring 7 from the left side of the inner valve body 2. Among them, an external thread is provided on the outer cylindrical surface of the threaded compression ring 7, and an internal thread of the same specification is provided in the corresponding inlet passage. The threaded compression ring 7 should not be tightened before the support shaft 3 is installed;

[0048] 7. Install the support shaft 3 from below the inner valve body 2. The upper end of the support shaft 3 is sleeved with the round hole below the sphere 5, and the support shaft 3 is fixed by a fastening screw;

[0049] 8. Tighten the threaded compression ring 7, and the right end face of the threaded compression ring 7 fits with the left end face of the valve seat support 8;

[0050] 9. Install two lifting ring screws 16 on the upper part of the inner valve body 2 for lifting the inner component assembly.

[0051] In this embodiment, as Figure 3 shown, the valve cover assembly mainly includes a valve cover 10 and a valve stem 15. The valve cover 10 is detachably arranged at the top of the outer valve body 1 through fastening bolts. The valve stem 15 is arranged in the middle of the valve cover 10 and penetrates through the valve cover 10 along the thickness direction of the valve cover 10, that is, penetrates through the valve cover 10 from top to bottom; a limiting hole is provided at the top of the sphere 5, and the bottom end of the valve stem 15 extends into the limiting hole so that the valve stem 15 can drive the sphere 5 to rotate.

[0052] In this embodiment, a limiting boss is further provided on the lower end surface of the valve cover 10, and the limiting boss is attached to the upper end surface of the inner component assembly to limit the upward movement of the inner component assembly.

[0053] In this embodiment, the bottom of the valve stem 15 is rotatably connected to the valve cover 10 through a bushing 9; a sealing groove is further provided on the top of the valve cover 10, and a multi-layer graphite packing ring 11 is arranged in the sealing groove. The graphite packing ring 11 is sleeved on the valve stem 15, and the top of the graphite packing ring 11 is pressed by a sealing ring 12; the valve cover assembly further includes a gland 14 which is fixed to the top of the valve cover 10 through fastening screws and sleeved on the valve stem 15. A second disc spring 13 is arranged in the gland 14 for pressing the sealing ring 12, and the elastic force of the second disc spring 13 presses the graphite packing ring 11 (flexible) through the sealing ring 12 to prevent fluid from leaking from the valve stem 15.

[0054] In this embodiment, as Figure 1 shown, the inner side walls on both sides of the first cavity are inclined inwards from top to bottom, and the side walls on both sides of the inner valve body 2 are correspondingly inclined inwards from top to bottom. That is, the first cavity in the outer valve body 1 is a tapered cavity with an upward opening, and the inner valve body 2 is correspondingly a tapered structure, which is convenient for putting in and taking out; wherein, the taper of the inner side walls on both sides of the first cavity and the side walls on both sides of the inner valve body 2 is preferably 10 degrees; further, sealing rings are embedded on both sides of the inner valve body 2 to prevent fluid from leaking from the flow channel.

[0055] The overall assembly steps of the top-mounted ball valve in this embodiment are as follows:

[0056] 1. Lift and place the inner component assembly in the outer valve body 1;

[0057] 2. After the lifting is completed, remove the lifting ring screw 16;

[0058] 3. Assemble the valve cover assembly from top to bottom, and insert the lower end of the valve stem 15 into the limiting hole in the upper part of the ball 5;

[0059] 4. The valve cover 10 and the outer valve body 1 are fixed through fastening bolts, and the boss on the lower end surface of the valve cover 10 is attached to the upper plane of the inner valve body 2 to limit the upward movement of the inner component assembly.

[0060] The disassembly process of the inner component assembly in this embodiment is as follows:

[0061] When the valve needs to be repaired, only the nut on the valve cover 10 needs to be removed, the valve cover assembly is removed, and then the inner component assembly is lifted out with a lifting tool.

[0062] In the present utility model, specific examples are used to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An upper-mounted ball valve, characterized in that: It includes an outer valve body, an inner component assembly, and a valve cover assembly. A first cavity is provided inside the outer valve body. The inner component assembly is assembled inside the first cavity. The valve cover assembly is detachably provided at the top of the outer valve body. When the valve cover assembly is removed, the inner component assembly can be taken out of the outer valve body. Among them, the inner component assembly includes an inner valve body, a valve seat, and a sphere. A second cavity is provided inside the inner valve body. The sphere is provided inside the second cavity, and the valve seats are provided on both sides of the sphere for support.

2. The top-mounted ball valve according to claim 1, wherein: The valve seats on both sides of the sphere are respectively a first valve seat and a second valve seat. A first groove is provided on one side of the inner valve body. The sealing surface of the first valve seat faces the sphere and the end facing away from the sealing surface extends into the first groove. An inlet passage is provided on the other side of the inner valve body for the sphere to enter. The inner component assembly further includes a valve seat support. The valve seat support is provided inside the inlet passage, and a second groove is provided on the valve seat support. The sealing surface of the second valve seat faces the sphere and the end facing away from the sealing surface extends into the second groove.

3. The top-mounted ball valve according to claim 2, wherein: A sealing ring is provided between the end of the first valve seat extending into the first groove and the side wall of the first groove. A first disc spring is also sleeved on the first valve seat. Among them, a first limit protrusion is provided on the side wall of the first valve seat, and the first disc spring abuts between the first limit protrusion and the side wall of the inner valve body. A sealing ring is provided between the end of the second valve seat extending into the second groove and the side wall of the second groove. A first disc spring is also sleeved on the second valve seat. Among them, a second limit protrusion is provided on the side wall of the second valve seat, and the first disc spring abuts between the second limit protrusion and the side wall of the valve seat support. A sealing ring is provided between the valve seat support and the inner wall of the inlet passage.

4. The top-mounted ball valve according to claim 2, characterized in that: The inner component assembly further includes a compression ring for compressing on the side of the valve seat support away from the second valve seat. Among them, the compression ring is a threaded compression ring and is threadedly connected inside the inlet passage.

5. The top-mounted ball valve according to claim 1, characterized in that: The inner component assembly further includes a support shaft. A support shaft passage is further provided at the bottom of the inner valve body. The support shaft passes through the support shaft passage and is fixedly connected to the inner valve body. Among them, a round hole is provided at the bottom of the sphere, and the support shaft extends into the round hole so that the sphere can rotate around the support shaft.

6. The top-mounted ball valve according to claim 1, characterized in that: A lifting structure is further provided at the top of the inner valve body for lifting. Among them, the lifting structure includes a lifting threaded hole. A lifting screw is threadedly connected to the lifting threaded hole, and a plurality of lifting threaded holes are provided. The plurality of lifting threaded holes are distributed along the circumferential direction of the inner valve body.

7. The top-mounted ball valve according to any one of claims 1-6, characterized in that: The inner side walls on both sides of the first cavity are inclined inward from top to bottom. The side walls on both sides of the inner valve body are inclined inward from top to bottom. Sealing rings are embedded on both sides of the inner valve body.

8. The top-mounted ball valve according to claim 1, wherein: The valve cover assembly includes a valve cover and a valve stem. The valve cover is detachably arranged at the top of the outer valve body. The valve stem is arranged in the middle of the valve cover and penetrates through the valve cover along the thickness direction of the valve cover. A limiting hole is provided at the top of the sphere, and the bottom end of the valve stem extends into the limiting hole so that the valve stem can drive the sphere to rotate.

9. The top-mounted ball valve according to claim 8, wherein: A limiting boss is further provided on the lower end surface of the valve cover, and the limiting boss is in contact with the upper end surface of the inner part assembly.

10. The top-mounted ball valve according to claim 8, characterized in that: The bottom of the valve stem is rotatably connected to the valve cover through a bushing. A sealing groove is further provided on the top of the valve cover. A graphite packing ring is arranged in the sealing groove. The graphite packing ring is sleeved on the valve stem, and the top of the graphite packing ring is pressed by a sealing ring. The valve cover assembly further includes a gland. The gland is arranged on the top of the valve cover and sleeved on the valve stem. A second disc spring is arranged in the gland for pressing the sealing ring.

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