ball valve

Abstract

The utility model provides a kind of ball valve, including valve body, valve core, valve stem, plugging and handle;Valve body is provided with the installation cavity for installing valve core, valve core is set in installation cavity, and sealing seat is embedded between the both sides of valve core and the inner wall of installation cavity, and each sealing seat is tightly sealed with the outer wall of valve core and the inner wall of installation cavity;Valve stem is set in plugging from bottom to top, and valve stem is axially limited with plugging and circumferentially sealed, plugging is fixed at the opening end of installation cavity and is used to close installation cavity, and the lower end of valve stem is drivingly connected with valve core, and handle is fixed at the upper end of valve stem and is used to drive valve stem to rotate;Compared with prior art ball valve, the utility model has the advantages of less parts, simple structure, and easy assembly.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a ball valve. Background Technology

[0002] A ball valve is a device installed on a pipeline to control the interruption and resumption of fluid flow; currently, ball valves on the market have the following structures: Figure 1 As shown, during assembly, the valve stem O-ring and flat gasket are first installed on the valve stem. Then, the valve stem is inserted into the valve body, allowing it to pass through the mounting hole from the inside out, thus securing the bottom of the valve stem within the valve body. The handle is then fixed to the outer end of the valve stem with screws. Next, the valve cover O-ring is installed on the valve cover. Subsequently, the upper sealing seat, valve ball, and lower sealing seat are sequentially installed into the valve body, ensuring the lower end of the valve stem engages with the valve ball. Finally, the valve cover is fixed to the end of the valve body. However, this ball valve structure not only suffers from numerous components and a complex structure, but also requires the valve stem to be inserted into the valve body and pass through the mounting hole from the inside out, resulting in cumbersome assembly. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a ball valve that, compared with ball valves in the prior art, has the advantages of fewer parts, simpler structure, and convenient assembly.

[0004] This utility model provides a ball valve, including a valve body, a valve core, a valve stem, a plug, and a handle. The valve body is provided with a mounting cavity for installing the valve core, and the valve core is disposed in the mounting cavity. Sealing seats are embedded between both sides of the valve core and the inner wall of the mounting cavity, and each sealing seat is tightly sealed to the outer wall of the valve core and the inner wall of the mounting cavity. The valve stem passes through the plug from bottom to top, and the valve stem and the plug are axially limited and circumferentially sealed. The plug is fixed at the opening end of the mounting cavity and is used to close the mounting cavity. The lower end of the valve stem is drivenly connected to the valve core, and the handle is fixed at the upper end of the valve stem and is used to drive the valve stem to rotate.

[0005] Compared with ball valves in the prior art, this utility model has the advantages of fewer parts, simpler structure, and convenient assembly.

[0006] In one possible implementation, a sealing ring is embedded in the outer peripheral wall of the valve stem, with the outer edge of the sealing ring tightly sealing against the inner peripheral wall of the plug. With this structure, under the action of the sealing ring, after the valve stem passes through the plug from bottom to top, the outer edge of the sealing ring can tightly seal against the inner peripheral wall of the plug, thereby enabling the sealing ring to reliably seal the gap between the plug and the valve stem.

[0007] In one possible implementation, the sealing ring has an "X" shaped cross-section. By using a sealing ring with this cross-sectional shape, it has the advantage of strong deformation capability, which allows the sealing ring to be more tightly sealed to the valve stem and the plug after the valve stem and the plug are assembled, thereby improving the sealing effect between the valve stem and the plug.

[0008] In one possible implementation, an annular support edge is provided on the outer wall of the lower end of the valve stem, and a flat gasket is fitted on the outside of the valve stem. The upper end face of the flat gasket is tightly sealed against the lower end face of the plug, and the lower end face of the flat gasket is tightly sealed against the upper end face of the annular support edge. With this structure, the annular support edge can reliably support the flat gasket, and the flat gasket can further seal the gap between the valve stem and the plug, thereby improving the sealing effect between the valve stem and the plug. In addition, under the action of the annular support edge and the flat gasket, the valve stem can be prevented from detaching from the plug from bottom to top.

[0009] In one possible implementation, a "I"-shaped insertion part is provided in the middle of the lower end of the valve stem, and a "I"-shaped slot is provided at the top of the valve core. The insertion part and the slot are engaged and circumferentially limited, and the lower end of the insertion part is tightly abutted against the inner bottom of the slot. With this structure, after the insertion part and the slot are engaged, the valve stem can be reliably connected to the valve core, that is, the valve stem can reliably drive the valve core to rotate. And because the lower end of the insertion part is tightly abutted against the inner bottom of the slot, and with the above-mentioned annular support edge and flat gasket structure, the axial limitation of the valve stem can be reliably achieved to prevent the valve stem from axial movement.

[0010] In one possible implementation, an annular protrusion is provided on the outer wall of the upper end of the plug, and the lower end of the plug is inserted into the mounting cavity. The annular protrusion abuts against the outer wall surface of the valve body. The plug is welded and fixed to the valve body located at the edge of the mounting cavity, and a circumferential seal is achieved. With this structure, under the action of the annular protrusion, before the plug is welded and fixed to the valve body, the annular protrusion can abut against the outer wall of the valve body, thereby achieving the limiting of the plug and the valve body. After the plug is welded and fixed to the valve body located at the edge of the mounting cavity, the plug can be reliably fixed to the valve body and achieve the purpose of circumferential sealing.

[0011] In one possible implementation, the handle is sleeved on the outside of the upper end of the valve stem and circumferentially limited by the valve stem. The handle and the valve stem are fastened by a screw that passes through the handle and is threaded to the valve stem. With this structure, the handle can be reliably fixed to the upper end of the valve stem, and the handle can reliably drive the valve core to rotate via the valve stem to control the opening and closing of the ball valve. Attached Figure Description

[0012] Figure 1 This is an exploded view of a ball valve in the prior art; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is an exploded view of the present invention; Figure 4 This is a cross-sectional structural diagram of the present invention. Detailed Implementation

[0013] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0014] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0015] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0016] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] See Figures 2-4 As shown in the figure, this application discloses a ball valve, including a valve body 1, a valve core 2, a valve stem 3, a plug 4, and a handle 5. The valve body 1 is provided with a mounting cavity 11 for mounting the valve core 2. The valve core 2 is disposed in the mounting cavity 11. Sealing seats 6 are embedded between both sides of the valve core 2 and the inner wall of the mounting cavity 11. Each sealing seat 6 is tightly sealed to the outer wall of the valve core 2 and the inner wall of the mounting cavity 11. The valve stem 3 passes through the plug 4 from bottom to top. The valve stem 3 and the plug 4 are axially limited and circumferentially sealed. The plug 4 is fixed at the open end of the mounting cavity 11 and is used to close the mounting cavity 11. The lower end of the valve stem 3 is connected to the valve core 2. The handle 5 is fixed at the upper end of the valve stem 3 and is used to drive the valve stem 3 to rotate.

[0018] A sealing ring 7 is embedded on the outer peripheral wall of the valve stem 3, and the outer edge of the sealing ring 7 is tightly sealed against the inner peripheral wall of the plug 4. With this structure, under the action of the sealing ring, after the valve stem passes through the plug from bottom to top, the outer edge of the sealing ring can be tightly sealed against the inner peripheral wall of the plug, thereby enabling the sealing ring to reliably seal the gap between the plug and the valve stem.

[0019] The sealing ring 7 has an "X" shaped cross section. By using a sealing ring with this cross section shape, it has the advantage of strong deformation capability. After the valve stem and the plug are assembled, the sealing ring can be further pressed tightly against the valve stem and the plug, which can improve the sealing effect between the valve stem and the plug.

[0020] An annular support edge 31 is provided on the outer wall of the lower end of the valve stem 3. A flat gasket 8 is fitted on the outside of the valve stem 3. The upper end face of the flat gasket 8 is tightly sealed with the lower end face of the plug 4, and the lower end face of the flat gasket 8 is tightly sealed with the upper end face of the annular support edge 31. With this structure, the annular support edge can reliably support the flat gasket, and the flat gasket can further seal the gap between the valve stem and the plug, thereby improving the sealing effect between the valve stem and the plug. In addition, under the action of the annular support edge and the flat gasket, the valve stem can be prevented from detaching from the plug from bottom to top.

[0021] A "I"-shaped insertion part 32 is provided in the middle of the lower end of the valve stem 3, and a "I"-shaped slot 21 is provided at the top of the valve core 2. The insertion part 32 and the slot 21 are engaged and circumferentially limited. The lower end of the insertion part 32 is tightly abutted against the inner bottom of the slot 21. With this structure, after the insertion part and the slot are engaged, the valve stem can be reliably connected to the valve core, that is, the valve stem can reliably drive the valve core to rotate. Since the lower end of the insertion part is tightly abutted against the inner bottom of the slot, and with the above-mentioned annular support edge and flat gasket structure, the axial limit of the valve stem can be reliably achieved to prevent the valve stem from axial movement.

[0022] An annular protrusion 41 is provided on the outer wall of the upper end of the plug 4. The lower end of the plug 4 is inserted into the mounting cavity 11. The annular protrusion 41 abuts against the outer wall surface of the valve body 1. The plug 4 is welded and fixed to the valve body 1 located at the edge of the mounting cavity 11 and circumferentially sealed. With this structure, under the action of the annular protrusion, before the plug is welded and fixed to the valve body, the annular protrusion can abut against the outer wall of the valve body, thereby achieving the limiting of the plug and the valve body. After the plug is welded and fixed to the valve body located at the edge of the mounting cavity, the plug can be reliably fixed to the valve body and achieve the purpose of circumferential sealing.

[0023] The handle 5 is sleeved on the outside of the upper end of the valve stem 3 and is circumferentially limited by the valve stem 3. The handle 5 and the valve stem 3 are fastened by the screw 9 that passes through the handle 5 and is threaded to the valve stem 3. With this structure, the handle can be reliably fixed to the upper end of the valve stem, and the handle can reliably drive the valve core to rotate through the valve stem to control the opening and closing of the ball valve.

[0024] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ball valve, comprising a valve body (1), a valve core (2), a valve stem (3), a plug (4), and a handle (5); characterized in that: The valve body (1) is provided with an installation cavity (11) for installing the valve core (2). The valve core (2) is disposed in the installation cavity (11). A sealing seat (6) is embedded between the two sides of the valve core (2) and the inner wall of the installation cavity (11). Each sealing seat (6) is tightly sealed to the outer wall of the valve core (2) and the inner wall of the installation cavity (11). The valve stem (3) is inserted into the plug (4) from bottom to top. The valve stem (3) and the plug (4) are axially limited and circumferentially sealed. The plug (4) is fixed at the opening end of the installation cavity (11) and is used to close the installation cavity (11). The lower end of the valve stem (3) is connected to the valve core (2) in a transmission manner. The handle (5) is fixed at the upper end of the valve stem (3) and is used to drive the valve stem (3) to rotate.

2. The ball valve according to claim 1, characterized in that: A sealing ring (7) is embedded on the outer peripheral wall of the valve stem (3), and the outer edge of the sealing ring (7) is tightly sealed to the inner peripheral wall of the plug (4).

3. The ball valve according to claim 2, characterized in that: The sealing ring (7) has an "X" shaped cross section.

4. The ball valve according to any one of claims 1-3, characterized in that: An annular support edge (31) is provided on the outer wall of the lower end of the valve stem (3). A flat gasket (8) is sleeved on the outside of the valve stem (3). The upper end face of the flat gasket (8) is tightly sealed with the lower end face of the plug (4). The lower end face of the flat gasket (8) is tightly sealed with the upper end face of the annular support edge (31).

5. The ball valve according to claim 4, characterized in that: The valve stem (3) has a "I"-shaped insertion part (32) at the middle of its lower end, and the valve core (2) has a "I"-shaped slot (21) at its top. The insertion part (32) and the slot (21) are engaged and circumferentially limited. The lower end of the insertion part (32) is tightly abutted against the inner bottom of the slot (21).

6. The ball valve according to any one of claims 1-3 or 5, characterized in that: The upper end of the plug (4) is provided with an annular protrusion (41), the lower end of the plug (4) is inserted into the mounting cavity (11), the annular protrusion (41) abuts against the outer wall surface of the valve body (1), and the plug (4) is welded and fixed to the valve body (1) located at the edge of the mounting cavity (11) and circumferentially sealed.

7. The ball valve according to any one of claims 1-3 or 5, characterized in that: The handle (5) is sleeved on the outside of the upper end of the valve stem (3) and is circumferentially limited by the valve stem (3). The handle (5) and the valve stem (3) are fastened by a screw (9) that passes through the handle (5) and is threadedly connected to the valve stem (3).

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