Novel low-torque vacuum ball valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a novel low-torque vacuum ball valve which comprises a main valve body and a valve cover, one end of the main valve body is provided with a valve cavity, the side wall of the end is provided with an installation cavity, a ball valve element is rotatably arranged in the valve cavity, a valve rod is arranged in the installation cavity, one end of the valve rod is fixedly connected with the ball valve element, and the other end of the valve rod is provided with a handle. A second valve seat is arranged in the valve cavity; a limiting clamping table is arranged on the inner wall of the mounting cavity, the end, connected with the ball valve element, of the valve rod is clamped on one side of the limiting clamping table, sealing filler is arranged on the other side of the limiting clamping table, and the valve rod is sleeved with a pressing plate used for pressing the sealing filler and a threaded positioning sleeve used for fixing the pressing plate. The sealing filler is arranged in the mounting cavity, the sealing performance of the valve rod is improved, meanwhile, the sealing filler is pressed through the threaded positioning sleeve, after the ball valve element of the ball valve is rotated to be in the closed state, the handle is detached, then the threaded positioning sleeve is taken down, the sealing filler can be replaced, valves on the upstream and the downstream of a pipeline do not need to be closed, and the operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a novel low-torque vacuum ball valve. Background Art

[0002] As a switching control element for fluid pipeline transportation, the ball valve is widely used in the hydraulic system pipelines of various industries such as electric power, petrochemical, metallurgy, ocean, natural gas, and pharmaceuticals. The ball valve is driven by a valve stem to rotate the ball in the valve cavity to control the connection and disconnection of the flow channel.

[0003] When the ball valve is in use, since the valve stem is often rotated, the position of the valve stem is extremely prone to wear, resulting in fluid leakage from the valve stem, directly affecting the normal use of the overall line. After wear, the ball valve needs to be replaced. When replacing the ball valve, it is also necessary to cut off the upstream and downstream pipelines. Moreover, after the ball valve is removed, the fluid remaining in the pipeline will also leak out, making it extremely inconvenient to replace the ball valve.

[0004] In view of the above problems, the present utility model document proposes a novel low-torque vacuum ball valve. Content of the Utility Model

[0005] The utility model provides a novel low-torque vacuum ball valve, which improves the sealing performance of the ball valve and is convenient for repairing the ball valve at the same time.

[0006] The utility model provides the following technical solutions:

[0007] A novel low-torque vacuum ball valve includes a main valve body and a valve cover. One end of the main valve body is provided with a valve cavity, and an installation cavity is provided on the side wall of this end. A ball valve core is rotatably arranged in the valve cavity, a valve stem is arranged in the installation cavity, one end of the valve stem is fixedly connected to the ball valve core, and the other end is connected with a handle. A first valve seat is clamped at a position corresponding to the ball valve core in the valve cover, and a second valve seat is clamped at a position corresponding to the ball valve core in the valve cavity; a limiting clamping platform is arranged on the inner wall of the installation cavity, the end of the valve stem connected to the ball valve core is clamped on one side of the limiting clamping platform adjacent to the valve cavity, a sealing packing is arranged on the other side of the limiting clamping platform, and a pressing plate for pressing the sealing packing and a threaded positioning sleeve for fixing the pressing plate are sleeved on the valve stem.

[0008] Further, a rectangular clamping groove is opened on the ball valve core, the end of the valve stem is a clamping block matching the clamping groove, a positioning groove is opened on the side wall of the clamping groove, and a spring plunger matching the positioning groove is clamped at the corresponding position of the clamping block.

[0009] Further, the end of the valve stem is a rectangular connecting head, the handle is sleeved on the connecting head and fixed by bolt locking, and an elastic retaining ring is arranged between the handle and the threaded positioning sleeve.

[0010] Further, a limit plate is also provided on the valve stem, and the limit plate is arranged between the threaded positioning sleeve and the elastic retaining ring.

[0011] Further, a sealing washer is provided between the clamping block at one end of the valve stem and the limit clamping platform.

[0012] Further, both the first valve seat and the second valve seat are of annular plate-like structures, with a limit groove formed on the inner side wall of one side, and the inner side wall of the opposite and symmetrical side being an inclined surface that matches the surface of the spherical valve core.

[0013] Further, the valve cover and the main valve body are connected by bolts and nuts in cooperation, and a metal wound gasket is provided at the connection.

[0014] In the present utility model, by arranging a sealing packing in the installation cavity, the sealing performance at the valve stem is improved. At the same time, the sealing packing is pressed tightly by the threaded positioning sleeve, which is convenient for replacing the sealing packing. After the spherical valve core of the ball valve is rotated to the closed state, the handle is removed, and then the threaded positioning sleeve is taken off, and the sealing packing can be replaced. It is not necessary to close the valves upstream and downstream of the pipeline, which reduces the operation difficulty, saves costs, and reduces the operation difficulty. Description of the Drawings

[0015] Figure 1 is a cross-sectional structural schematic diagram of a novel low-torque vacuum ball valve provided by an embodiment of the present utility model;

[0016] Figure 2 is Figure 1 the enlarged view of part I.

[0017] Reference Signs:

[0018] 1. Valve cover; 2. Main valve body; 3. Spherical valve core; 4. First valve seat; 5. Second valve seat; 6. Installation cavity; 7. Valve stem; 8. Sealing packing; 9. Threaded positioning sleeve; 10. Limit plate; 11. Handle; 12. Limit clamping platform; 13. Sealing washer; 14. Metal wound gasket; 15. Pressure plate; 16. Spring plunger; 17. Positioning groove. Detailed Embodiment

[0019] The following describes the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model.

[0020] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixing" means being connected to each other and the relative positional relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present utility model, such as "inside", "outside", "top", "bottom", etc., are only references to the direction of the attached drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the embodiments of the present utility model.

[0021] In the embodiments of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0022] In the embodiments of the present utility model, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0023] The reference to "one embodiment" or "some embodiments" etc. described in this specification means that in one or more embodiments of the present utility model, specific features, structures or characteristics described in combination with this embodiment are included. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0024] Embodiment:

[0025] Refer to Figure 1 and Figure 2As shown in the figure, a new type of low-torque vacuum ball valve includes a main valve body 2 and a valve cover 1. One end of the main valve body 2 is provided with a valve cavity, and an installation cavity 6 is provided on the side wall of this end. A ball valve core 3 is rotatably arranged in the valve cavity. A valve stem 7 is arranged in the installation cavity 6. One end of the valve stem 7 is fixedly connected to the ball valve core 3, and the other end is connected with a handle 11. A first valve seat 4 is clamped at the position corresponding to the ball valve core 3 in the valve cover 1, and a second valve seat 5 is clamped at the position corresponding to the ball valve core 3 in the valve cavity; a limiting clamping platform 12 is arranged on the inner wall of the installation cavity 6. The end of the valve stem 7 connected to the ball valve core 3 is clamped on one side of the limiting clamping platform 12 adjacent to the valve cavity. A sealing packing 8 is arranged on the other side of the limiting clamping platform 12. A pressing plate 15 for pressing the sealing packing and a threaded positioning sleeve 9 for fixing the pressing plate 15 are sleeved on the valve stem 7.

[0026] The valve cover 1 cooperates with the main valve body 2 to clamp the ball valve core 3 between the first valve seat 4 and the second valve seat 5. Through the cooperation of the first valve seat 4 and the second valve seat 5, the rotation of the ball valve core 3 can control the opening or closing of the ball valve. The ball valve core 3 is rotated by the valve stem 7. A sealing packing 8 is arranged on the limiting clamping platform 12 of the installation cavity 6 to improve the sealing performance at the valve stem 7. At the same time, the threaded positioning sleeve 9 presses the pressing plate 15, and then the pressing plate 15 presses and fixes the sealing packing 8 to ensure that the sealing packing 8 is closely attached to the side wall of the valve stem 7, thereby ensuring the sealing effect. At the same time, a handle 11 is arranged at the end of the valve stem 7 to facilitate the rotation of the valve stem 7. After removing the handle 11, the threaded positioning sleeve 9 can be removed, and then the sealing packing 8 can be taken out. When the ball valve has been used for a long time and the sealing packing 8 is worn, it is convenient to replace the sealing packing 8. When replacing, the ball valve core 3 is rotated to the closed state of the ball valve, and then the replacement can be carried out without disassembling the entire ball valve from the conveying pipeline, saving costs and preventing the fluid remaining in the conveying pipeline from leaking, reducing the operation difficulty and improving the adaptability of the ball valve.

[0027] A rectangular clamping groove is formed on the ball valve core 3. The end of the valve stem 7 is a clamping block matching the clamping groove. A positioning groove 17 is formed on the side wall of the clamping groove, and a spring plunger 16 matching the positioning groove 17 is clamped at the corresponding position of the clamping block.

[0028] Through the cooperation of the clamping groove and the clamping block, the rotation of the valve stem 7 can drive the ball valve core 3 to rotate together. The spring plunger 16 on the clamping block cooperates with the positioning groove 17. When the valve stem 7 is installed on the ball valve core 3, on the one hand, it positions the installation direction of the valve stem 7, and on the other hand, it also prevents the valve stem 7 from easily falling off the ball valve core 3, improving the stability of the overall structure of the ball valve.

[0029] The end of the valve stem 7 is a rectangular connecting head. The handle 11 is sleeved on the connecting head and fixed by bolt locking. An elastic retaining ring is arranged between the handle 11 and the threaded positioning sleeve 9.

[0030] The handle 11 is sleeved on the rectangular connecting head of the valve stem 7. When the handle 11 is rotated, the valve stem 7 can be driven to rotate, which is convenient for controlling the ball valve. An elastic retaining ring is arranged at the connection to improve the stability of the bolt locking and prevent the bolts from loosening during the use of the ball valve, resulting in the detachment of the handle 11.

[0031] A limit plate 10 is also provided on the valve stem 7, and the limit plate 10 is arranged between the threaded positioning sleeve 9 and the elastic retaining ring.

[0032] The rotation angle of the handle 11 is limited by the limit plate 10 to ensure that the handle 11 can be accurately rotated to the fully open or closed state of the ball valve, guaranteeing the precise opening or closing of the ball valve. During actual use, a limit block will be set externally, and the rotation angle of the limit plate 10 is limited by the cooperation of the limit block and the limit plate 10 on the ball valve, thereby limiting the rotation angle of the handle 11.

[0033] A sealing washer 13 is provided between the clamping block at one end of the valve stem 7 and the limit clamping platform 12.

[0034] The sealing performance between the valve stem 7 and the limit clamping platform 12 is improved through the sealing washer 13, further enhancing the sealing performance of the ball valve.

[0035] Both the first valve seat 4 and the second valve seat 5 are annular plate-like structures. A limit groove is opened on the inner side wall of one side, and the inner side wall of the symmetric other side is an inclined surface that matches the surface of the ball valve core 3.

[0036] The first valve seat 4 is clamped on the valve cover 1 through the limit groove on one side, and the inclined surface on the other side matches the surface of the ball valve core 3 to ensure the sealing performance between the ball valve core 3 and the first valve seat 4. The second valve seat 5 is clamped on the main valve body 2 through the limit groove on one side, and the inclined surface on the other side matches the surface of the ball valve core 3 to ensure the sealing performance between the ball valve core 3 and the second valve seat 5. Through the cooperation of the first valve seat 4 and the second valve seat 5, the ball valve core 3 is limited to ensure the stability of the rotation of the ball valve core 3. At the same time, through the cooperation of the ball valve core 3 with the first valve core and the second valve core, the sealing performance during the rotation of the ball valve is ensured, effectively preventing the fluid from flowing from the connection between the valve core and the first valve core or the second valve core to the valve stem 7, further ensuring the sealing effect of the ball valve.

[0037] The valve cover 1 and the main valve body 2 are connected by bolts and nuts, and a metal wound gasket 14 is provided at the connection.

[0038] The sealing performance between the valve cover 1 and the main valve body 2 is improved through the metal wound gasket 14, further enhancing the sealing effect of the ball valve.

[0039] In use, the ball valve is connected to the fluid pipeline, and a limit block that cooperates with the limit plate 10 is arranged at the ball valve. The rotation angle of the limit plate 10 is restricted by the limit block, so that the limit plate 10 can accurately rotate to the angle when the ball valve is fully opened or fully closed, and then it can be used. When the ball valve is in use, the rotation of the valve stem 7 and the friction with the sealing packing 8 will cause damage to the sealing packing 8, affecting the sealing performance between the valve stem 7 and the sealing packing 8. At this time, the ball valve core 3 is rotated to the fully closed state of the ball valve, then the bolt fixing the handle 11 is loosened, the handle 11 can be removed from the valve stem 7, then the limit plate 10 is removed, and then the threaded positioning sleeve 9 is removed from the installation cavity 6, and then the sealing packing 8 in the installation cavity 6 can be taken out, then the sealing packing 8 is replaced, and then the pressure plate 15, the threaded positioning sleeve 9, the limit plate 10 and the handle 11 are installed in sequence, and the ball valve can be used normally.

[0040] In actual use, internal threads are provided on the side wall of the installation cavity 6 to facilitate the installation of the threaded positioning sleeve 9, and the sealing packing 8 is pressed by the threaded positioning sleeve 9.

[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention; without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A new type of low torque vacuum ball valve, characterized in that: It comprises a main valve body and a valve cover, wherein a valve cavity is provided at one end of the main valve body, and an installation cavity is provided on the side wall of the end, a ball valve core is rotatably arranged in the valve cavity, a valve stem is provided in the installation cavity, one end of the valve stem is fixedly connected to the ball valve core, and the other end is connected to a handle, a first valve seat is clamped at a position corresponding to the ball valve core in the valve cover, and a second valve seat is clamped at a position corresponding to the ball valve core in the valve cavity; a limit clamp is provided on the inner wall of the installation cavity, an end of the valve stem connected to the ball valve core is clamped on a side of the valve cavity adjacent to the limit clamp, a sealing packing is provided on the other side of the limit clamp, and a pressure plate for pressing the sealing seasoning and a threaded positioning sleeve for fixing the pressure plate are provided on the valve stem.

2. A novel low torque vacuum ball valve according to claim 1, characterized in that: The ball valve core is provided with a rectangular slot, the end of the valve stem is a block matching the slot, the side wall of the slot is provided with a positioning slot, and a spring plunger matching the positioning slot is clamped at the corresponding position of the block.

3. A novel low torque vacuum ball valve according to claim 1, characterized in that: The end of the valve stem is a rectangular connector, the handle is sleeved on the connector and is fastened by bolts, and an elastic retaining ring is provided between the handle and the threaded positioning sleeve.

4. A novel low torque vacuum ball valve according to claim 3, characterized in that: The valve stem is also provided with a limit plate, and the limit plate is arranged between the threaded positioning sleeve and the elastic retaining ring.

5. A novel low torque vacuum ball valve according to claim 2, characterized in that: A sealing gasket is provided between the clamping block at one end of the valve stem and the limiting clamping platform.

6. A novel low torque vacuum ball valve according to claim 1, characterized in that: The first valve seat and the second valve seat are both annular plate structures, with a limiting groove formed on the inner side wall on one side, and a symmetrical inner side wall on the other side being an inclined surface matched with the surface of the ball valve core.

7. A novel low torque vacuum ball valve according to claim 1, characterized in that: The valve cover is connected to the main valve body by bolts and nuts, and a metal winding gasket is provided at the connection.

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