A cryogenic shut-off valve

Abstract

This utility model provides a cryogenic shut-off valve, relating to the technical field of shut-off valves. The cryogenic shut-off valve includes a valve seat, a valve cover, a valve stem, a valve disc, and a handwheel. The valve seat has an inlet pipe, a connecting pipe, and an outlet pipe. The connecting pipe has an inlet and an outlet, the inlet communicating with the inlet pipe and the outlet communicating with the outlet pipe. The valve cover is connected to the valve seat and has a cylindrical section containing a sealing cylinder, with a sealing cap threadedly connected to the cylinder. The valve stem passes through the sealing cylinder and the sealing cap and is threadedly connected to the valve cover. The valve disc includes a fixed seat, a sealing element, and a limiting nut. The fixed seat is fixedly connected to the valve stem and has a limiting groove. The sealing element includes an upper sealing body and a lower sealing body, the upper sealing body being disposed in the limiting groove, and the lower sealing body being integrally formed with the upper sealing body and adapted to the inlet. This cryogenic shut-off valve solves the technical problem of existing cryogenic shut-off valves, where closing the valve easily leads to media leakage when the medium contains impurities.

Description

Technical Field

[0001] This utility model relates to the technical field of shut-off valves, and in particular to a cryogenic shut-off valve. Background Technology

[0002] Cryogenic shut-off valves are valves used in the management system of cryogenic liquid storage and transportation equipment, and are characterized by flexible opening and closing and reliable sealing.

[0003] Existing cryogenic shut-off valves include a valve seat, valve cover, valve stem, valve disc, and handwheel. The valve cover and valve seat are bolted together, the valve stem is threaded to the valve cover, the handwheel is fixedly connected to the upper end of the valve stem, and the valve disc is fixedly connected to the lower end of the valve stem. When the valve needs to be closed, turning the handwheel rotates the valve stem, which in turn moves the valve disc downwards, thus closing the connection port within the valve seat. However, if the medium contains impurities or particles, the sealing surface between the valve disc and the connection port may not completely seal when the valve is closed, potentially leading to media leakage.

[0004] In the process of implementing this embodiment, the inventors discovered at least the following problems: Existing cryogenic shut-off valves are prone to leakage when the medium contains impurities, especially when the valve is closed. Utility Model Content

[0005] The purpose of this utility model is to provide a cryogenic shut-off valve that solves the technical problem that existing cryogenic shut-off valves are prone to leakage when the medium contains impurities.

[0006] Utility model solution: This utility model provides a cryogenic shut-off valve, including a valve seat, a valve cover, a valve stem, a valve disc, and a handwheel; the valve seat is provided with an inlet pipe, a connecting pipe, and an outlet pipe; the connecting pipe is provided with an inlet and an outlet, the inlet being connected to the inlet pipe and the outlet being connected to the outlet pipe; the valve cover is connected to the valve seat and is provided with a cylindrical section, the cylindrical section containing a sealing cylinder, and the cylindrical section being threadedly connected to a sealing cap; the valve stem passes through the sealing cylinder and the sealing cap, and is threadedly connected to the valve cover; the valve disc includes a fixed seat, a sealing element, and a limiting nut; the fixed seat is fixedly connected to the valve stem and is provided with a limiting groove; the sealing element includes an upper sealing body and a lower sealing body, the upper sealing body being disposed in the limiting groove, the lower sealing body being integrally formed with the upper sealing body, and being adapted to be connected to the inlet; the limiting nut is threadedly connected to the lower end of the valve stem and abuts against the lower sealing body; the handwheel is connected to the upper end of the valve stem.

[0007] Furthermore, the lower surface of the upper sealing body is provided with several annular bodies.

[0008] Furthermore, the lower sealing body is provided with a gasket groove, and a fixing gasket is provided in the gasket groove, the fixing gasket abutting against the limiting nut.

[0009] Furthermore, the lower end of the valve stem is provided with a pin, which is located below the limiting nut.

[0010] Furthermore, the valve seat is provided with a sealing groove, and a sealing gasket is provided in the sealing groove.

[0011] Beneficial effects: This invention provides a cryogenic shut-off valve. When the valve is closed, turning the handwheel causes the valve stem to rotate. With the valve stem threaded onto the valve cover, the valve stem moves the fixed seat downwards, which in turn moves the sealing element downwards. The lower sealing body provides a primary seal at the inlet, reducing the entry of impurities into the connecting pipe. Then, the upper sealing body presses tightly against the connecting pipe, providing a secondary seal at the inlet and enhancing the sealing effect. When the sealing element is damaged, it can be removed from the limiting groove and replaced by unloading the limiting nut. Therefore, this cryogenic shut-off valve has a good sealing effect, and even when the medium contains impurities, closing the valve does not easily lead to medium leakage. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the cryogenic shut-off valve provided in this embodiment; Figure 2 This is a schematic diagram of the structure of the cryogenic shut-off valve provided in this embodiment; Figure 3 This is a cross-sectional view of the cryogenic shut-off valve portion provided in this embodiment; Figure 4 This is a schematic diagram of the structure of the cryogenic shut-off valve provided in this embodiment; Figure 5 This is a schematic diagram of the low-temperature shut-off valve provided in this embodiment.

[0014] icon: 100 - Valve seat; 110 - Inlet pipe; 120 - Connecting pipe; 121 - Inlet; 122 - Outlet; 130 - Outlet pipe; 140 - Sealing groove; 150 - Sealing gasket; 200 - Valve cover; 210 - Column; 220 - Sealing cylinder; 230 - Sealing cover; 300 - Valve stem; 310 - Pin; 400-Valve disc; 410-Fixing seat; 411-Limiting groove; 420-Seal; 421-Upper sealing body; 422-Lower sealing body; 423-Annular body; 424-Gasket groove; 425-Fixing gasket; 430-Limiting nut; 500-handwheel. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] Furthermore, terms such as "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] This embodiment provides a cryogenic shut-off valve; please refer to [reference needed]. Figure 1-5 As shown, the valve includes a valve seat 100, a valve cover 200, a valve stem 300, a valve disc 400, and a handwheel 500. The valve seat 100 is provided with an inlet pipe 110, a connecting pipe 120, and an outlet pipe 130. The connecting pipe 120 is provided with an inlet 121 and an outlet 122, with the inlet 121 connected to the inlet pipe 110 and the outlet 122 connected to the outlet pipe 130. The valve cover 200 is connected to the valve seat 100 and is provided with a cylindrical tube 210. A sealing cylinder 220 is provided inside the cylindrical tube 210, and a sealing cap 230 is threadedly connected to the cylindrical tube 210. The valve stem 300 passes through the sealing cylinder 220 and the sealing cap 230. It is threadedly connected to the valve cover 200; the valve disc 400 includes a fixed seat 410, a sealing element 420, and a limiting nut 430; the fixed seat 410 is fixedly connected to the valve stem 300, and it is provided with a limiting groove 411; the sealing element 420 includes an upper sealing body 421 and a lower sealing body 422, the upper sealing body 421 is disposed in the limiting groove 411, the lower sealing body 422 is integrally formed with the upper sealing body 421, and it is adapted to be connected to the inlet 121; the limiting nut 430 is threadedly connected to the lower end of the valve stem 300, and it abuts against the lower sealing body 422; the handwheel 500 is connected to the upper end of the valve stem 300.

[0022] Specifically, valve seat 100 forms a sealed space, inlet pipe 110 connects to the inlet end of the pipeline, connecting pipe 120 controls the water flow direction, inlet port 121 allows water from inlet pipe 110 to enter connecting pipe 120 (also serving as a switch), outlet port 122 allows water from connecting pipe 120 to enter outlet pipe 130 (connecting to the outlet end of the pipeline), valve cover 200 is connected to valve seat 100 via a flange, cylinder 210 mounts sealing cylinder 220 and sealing cap 230, sealing cylinder 220 prevents water from flowing out of the connecting pipe 120 through the gap between valve stem 300 and valve cover 200, and sealing cap 230 secures the sealing cylinder... 220 is pressed into the cylinder 210; valve stem 300 is used to control the up and down movement of valve disc 400; valve disc 400 is used to control the opening and closing of water inlet 121; fixed seat 410 is used to install sealing element 420; the setting of limit groove 411 is used to limit the upper sealing body 421; the upper sealing body 421 and the lower sealing body 422 are integrally formed to ensure the connection strength of the upper sealing body 421 and the lower sealing body 422; the lower sealing body 422 provides axial wall sealing for water inlet 121; the upper sealing body 421 seals the upper surface of water inlet 121; the setting of limit nut 430 is used to prevent the sealing element 420 from moving axially; handwheel 500 facilitates the operator to rotate valve stem 300. When closing the valve, turn the handwheel 500. The handwheel 500 drives the valve stem 300 to rotate. With the valve stem 300 threadedly engaged with the valve cover 200, the valve stem 300 drives the fixed seat 410 to move downward. The fixed seat 410 drives the sealing element 420 to move downward. The lower sealing body 422 seals the inlet 121 once, reducing the amount of impurities entering the connecting pipe 120. Then, the upper sealing body 421 fits and presses tightly against the connecting pipe 120, providing a secondary seal for the inlet 121 and enhancing the sealing effect. When the sealing element 420 is damaged, it can be removed from the limiting groove 411 and replaced by unloading the limiting nut 430.

[0023] In this embodiment, the lower surface of the upper sealing body 421 is provided with a plurality of annular bodies 423.

[0024] Specifically, there are three annular bodies 423. Even if some impurities pass through the first seal, the gaps in the annular bodies 423 will intercept them, enhancing the sealing performance of the seal 420.

[0025] In this embodiment, the lower sealing body 422 is provided with a gasket groove 424, and a fixing gasket 425 is provided in the gasket groove 424. The fixing gasket 425 abuts against the limiting nut 430.

[0026] Specifically, the groove 424 and the fixing pad 425 are designed to ensure that the seal 420 is stably mounted on the fixing seat 410, thereby ensuring the stability of the seal.

[0027] In this embodiment, a pin 310 is provided at the lower end of the valve stem 300, and the pin 310 is located below the limiting nut 430.

[0028] Specifically, the pin 310 is designed to prevent the limit nut 430 from falling off.

[0029] In this embodiment, the valve seat 100 is provided with a sealing groove 140, and a sealing gasket 150 is provided in the sealing groove 140.

[0030] Specifically, the sealing groove 140 and the sealing gasket 150 are designed to enhance the sealing between the valve seat 100 and the valve cover 200, preventing water leakage.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cryogenic shut-off valve, characterized in that, Includes valve seat (100), valve cover (200), valve stem (300), valve disc (400) and handwheel (500); The valve seat (100) is provided with an inlet pipe (110), a connecting pipe (120) and an outlet pipe (130). The connecting pipe (120) is provided with an inlet (121) and an outlet (122). The inlet (121) is connected to the inlet pipe (110), and the outlet (122) is connected to the outlet pipe (130). The valve cover (200) is connected to the valve seat (100), and it is provided with a cylinder (210). A sealing cylinder (220) is provided inside the cylinder (210), and a sealing cap (230) is threadedly connected to the cylinder (210). The valve stem (300) passes through the sealing cylinder (220) and the sealing cover (230), and is threadedly connected to the valve cover (200); The valve disc (400) includes a fixed seat (410), a seal (420), and a limiting nut (430). The fixed seat (410) is fixedly connected to the valve stem (300), and it is provided with a limiting groove (411). The sealing element (420) includes an upper sealing body (421) and a lower sealing body (422). The upper sealing body (421) is disposed in the limiting groove (411). The lower sealing body (422) is integrally formed with the upper sealing body (421) and is adapted to be connected to the water inlet (121). The limiting nut (430) is threaded to the lower end of the valve stem (300) and abuts against the lower sealing body (422); The handwheel (500) is connected to the upper end of the valve stem (300).

2. The cryogenic shut-off valve according to claim 1, characterized in that, The lower surface of the upper sealing body (421) is provided with several annular bodies (423).

3. A cryogenic shut-off valve according to claim 2, characterized in that, The lower sealing body (422) is provided with a gasket groove (424), and a fixing gasket (425) is provided in the gasket groove (424), and the fixing gasket (425) abuts against the limiting nut (430).

4. A cryogenic shut-off valve according to claim 3, characterized in that, The valve stem (300) is provided with a pin (310) at its lower end, and the pin (310) is located below the limiting nut (430).

5. A cryogenic shut-off valve according to claim 4, characterized in that, The valve seat (100) is provided with a sealing groove (140), and a sealing gasket (150) is provided in the sealing groove (140).

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