High-pressure-resistant spherical stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a high-pressure-resistant spherical stop valve which comprises a valve body and connectors on the two sides, and a valve cavity is formed in the valve body. A control valve rod is arranged on the valve body; the bottom of the control valve rod extends into the valve cavity and is connected with the spherical valve core; a filler cylinder is arranged outside the control valve rod; the connector is composed of a rotating outer pipe and an adjusting inner pipe. The rotating outer pipe is rotationally connected to the valve body through a connecting plug. An internal thread is arranged on the inner wall of the rotating outer pipe; an external thread is arranged on the outer wall of the adjusting inner pipe; the adjusting inner pipe is rotationally mounted in the rotating outer pipe through threads; the adjusting inner pipe is separated from the valve body; the wall thickness of the pipe wall of the adjusting inner pipe is gradually increased from the inner side to the outer side; a mounting gap exists between the adjusting inner pipe and the outer wall of the valve cavity, so that external lateral force applied by a high-pressure rubber pipe at the joint is effectively relieved, and the liquid leakage phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a high-pressure resistant ball gate valve. Background Technology

[0002] A gate valve, also known as a stop valve, is a type of forced-seal valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to ensure a leak-proof seal. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome consists of the frictional force of the valve stem and packing, and the thrust generated by the pressure of the medium. In pipeline control systems of industrial pipelines in my country's petroleum, chemical, power, metallurgy, food, pharmaceutical, light textile, and paper industries, especially in applications with limited installation space, gate valves effectively address the shortcomings of ordinary gate valves in high-pressure and large-space applications.

[0003] When the pressure in the hydraulic pipeline changes drastically, the existing ball valve and its connected hose are subjected to a sudden impact force. The valve joint, under the impact of the high-pressure liquid in the pipeline and the force exerted by the hose, is susceptible to loosening due to the external lateral force applied by the high-pressure hose. This can cause damage to the valve body and valve gasket, leading to seal failure and frequent leaks, thus reducing industrial production efficiency. Utility Model Content

[0004] The purpose of this application is to provide a high-pressure resistant spherical shut-off valve, which aims to solve the problems in the prior art.

[0005] This application provides a high-pressure resistant spherical gate valve, including a valve body and connectors on both sides. The valve body has a valve cavity; the two sides of the valve cavity are an inlet and an outlet, respectively; the connectors are respectively installed at the inlet and outlet; the valve body has a control valve stem; the bottom of the control valve stem extends into the valve cavity and is connected to the spherical valve core; the top of the control valve stem has a rotating handle; a packing cylinder is provided outside the control valve stem; sealing packing is provided inside the packing cylinder; a packing gland is provided at the top of the packing cylinder; the connectors consist of a rotating outer tube and an adjusting inner tube; the rotating outer tube is rotatably connected to the valve body through a plug connector; the inner wall of the rotating outer tube has an internal thread; the outer wall of the adjusting inner tube has an external thread; the adjusting inner tube is rotatably installed inside the rotating outer tube through the thread; the adjusting inner tube is separate from the valve body; the wall thickness of the adjusting inner tube gradually increases from the inside to the outside; there is an installation gap between the adjusting inner tube and the outer wall of the valve cavity.

[0006] Furthermore, the valve cavity is provided with a spherical valve core and a valve seat; the valve seat is located on both sides of the spherical valve core, and the inner side of the valve seat is adapted to the spherical valve core.

[0007] Furthermore, a first sealing ring is embedded at the junction of the control valve stem and the ball valve core; a second sealing ring is provided around the valve seat.

[0008] Furthermore, the sealing filler is a flexible graphite material.

[0009] Furthermore, the side of the rotating outer tube that connects to the valve body is provided with a barbed plug; the valve body is provided with a corresponding plug hole; the plug is inserted into the plug hole and rotates to connect with the valve body.

[0010] The beneficial effects of this utility model are: this device makes the connection between the hose and the cavity at the connection point compact. By adjusting the squeezing and limiting of the inner tube, the external lateral force applied by the high-pressure hose at the connection point is effectively reduced. The adjustment by rotating the thread can also effectively prevent the outer tube from loosening and the inner tube from being adjusted, thus avoiding leakage. At the same time, it can be applied to hoses of different thicknesses, effectively improving the working efficiency of the shut-off valve. Attached Figure Description

[0011] Figure 1 This is a structural diagram of the present utility model.

[0012] Figure 2 This is a schematic diagram of the gate valve in operation.

[0013] In the picture:

[0014] 1. Valve body; 11. Valve cavity; 12. Ball valve core; 2. Rotating outer tube; 21. Internal thread; 22. Hook-shaped plug; 3. Adjusting inner tube; 31. External thread; 4. Valve seat; 41. Second sealing ring; 5. Control valve stem; 51. First sealing ring; 6. Rotating handle; 7. Packing sleeve; 71. Sealing packing; 72. Packing gland; 8. Installation clearance. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 and Figure 2The high-pressure resistant spherical gate valve shown includes a valve body 1 and two side connectors. The valve body 1 has a valve cavity 11; the two sides of the valve cavity 11 are an inlet and an outlet, respectively; the connectors are respectively installed at the inlet and outlet; a control valve stem 5 is provided on the valve body 1; the bottom of the control valve stem 5 extends into the valve cavity 11 and connects to a spherical valve core 12, and the valve core has a through hole, a common feature for spherical valve cores; a rotating handle 6 is provided at the top of the control valve stem 5; a packing cylinder 7 is provided outside the control valve stem 5; sealing packing 71 is provided inside the packing cylinder 7; a packing gland 72 is provided at the top of the packing cylinder 7, which can prevent valve stem jamming caused by high pressure; the connectors consist of a rotating outer tube 2 and an adjusting inner tube 3; the rotating outer tube 2 is connected to a plug connector. 22 is rotatably connected to valve body 1; the inner wall of the rotating outer tube 2 is provided with an internal thread 21; the outer wall of the adjusting inner tube 3 is provided with an external thread 31; the adjusting inner tube 3 is rotatably installed in the rotating outer tube 2 through the thread; the adjusting inner tube is separated from valve body 1; the wall thickness of the adjusting inner tube 3 gradually increases from the inside to the outside; there is an installation gap 8 between the adjusting inner tube 3 and the outer wall of valve cavity 11. In use, the rotating outer tube 2 is rotated first, and the adjusting inner tube 3 is moved outward under the action of the thread. Then, the hose to be installed is inserted into the installation gap 8. Finally, the adjusting inner tube 3 is moved inward by rotating the rotating outer tube 2 in the opposite direction until the hose is tightly clamped between the outer wall of valve cavity 11 and the adjusting inner tube 3, thus completing the connection between the hose and valve body 1.

[0017] The valve cavity 11 is provided with a spherical valve core 12 and a valve seat 4. The valve seat 4 is located on both sides of the spherical valve core 11, and the inner side of the valve seat 4 is adapted to the spherical valve core 11. When the valve is in use, the handle 6 is turned, which rotates the control valve stem 5. The valve stem then drives the spherical valve core 12 to rotate, so that the through hole on the valve core and the valve cavity 11 are aligned, thus forming a pipeline. When it is necessary to cut off the pipeline, the handle 6 is turned, which drives the control valve stem to rotate, so that the through hole on the valve core is misaligned with the two valve cavities 11, thus cutting off the flow of liquid.

[0018] A first sealing ring 51 is embedded at the junction of the control valve stem 5 and the ball valve core 12; a second sealing ring 41 is provided around the valve seat 4, and the material, structure and position of the sealing rings can refer to the prior art.

[0019] The sealing filler 71 is a flexible graphite material with good sealing performance.

[0020] The rotating outer tube 2 is provided with a barbed plug 22 on the side that connects to the valve body 1; the valve body 1 is provided with a corresponding plug hole; the plug 22 is inserted into the plug hole and rotatedly connected to the valve body 2, so that the rotating outer tube 2 can rotate relative to the valve body 1. The barbed plug 22 is used to ensure that the rotating outer tube 2 and the valve body 1 are always in contact and that the rotating outer tube 2 does not fall off the valve body 1 due to external force.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-pressure resistant globe valve comprising a valve body and a joint on both sides, characterized in that, The valve body is provided with a valve cavity; the valve cavity is provided with a spherical valve core and a valve seat; the two sides of the valve cavity are respectively a liquid inlet and a liquid outlet; the joint is respectively installed at the liquid inlet and the liquid outlet; the valve body is provided with a control valve rod; the bottom of the control valve rod extends into the valve cavity and is connected with the spherical valve core; the top of the control valve rod is provided with a rotating handle; the outside of the control valve rod is provided with a packing gland; the packing gland is provided with sealing packing; the top of the packing gland is provided with a packing gland; the joint is composed of a rotating outer tube and an adjusting inner tube; the rotating outer tube is rotatably connected to the valve body through a plug joint; the inner wall of the rotating outer tube is provided with internal threads; the outer wall of the adjusting inner tube is provided with external threads; the adjusting inner tube is rotatably installed in the rotating outer tube through threads; the adjusting inner tube is separated from the valve body; the wall thickness of the adjusting inner tube gradually increases from the inside to the outside; there is an installation gap between the adjusting inner tube and the outer wall of the valve cavity.

2. The high-pressure resistant globe valve according to claim 1, characterized in that The valve seat is located on both sides of the spherical valve core, and the inner side of the valve seat is matched with the spherical valve core.

3. The high-pressure resistant globe valve according to claim 1, characterized in that The control valve rod is provided with a first sealing ring at the joint with the spherical valve core; the valve seat is provided with a second sealing ring around it.

4. The high-pressure resistant globe valve according to claim 1, wherein The sealing packing is a flexible graphite material.

5. The high-pressure resistant globe valve according to claim 1, wherein The side of the rotating outer tube connected with the valve body is provided with an inverted hook-shaped plug joint; the valve body is provided with a corresponding plug hole; the plug joint is inserted into the plug hole and is rotatably connected with the valve body.

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