Valve cover threaded sleeve structure suitable for ultralow-temperature valve

Abstract

The utility model relates to a valve cover screw sleeve structure suitable for an ultra-low temperature valve, which comprises a valve cover and a connecting pipe, the upper end of the valve cover is connected with the connecting pipe, the lower end of the valve cover is provided with a mounting hole, the mounting hole is internally connected with a screw sleeve, the screw sleeve is of an eccentric structure, and the connecting pipe is connected with the connecting pipe. A check ring used for positioning and fixing the threaded sleeve is connected into the mounting hole. The device is convenient to mount, dismount and replace, and is simple to maintain.

Description

Technical Field

[0001] The utility model relates to a valve cover bushing structure applicable to a cryogenic valve. Background Art

[0002] At present, the combined structure of the valve cover bushing of the cryogenic valve in the market does not have an eccentric structure. As Figure 1 shown, at the same time, due to the problem of the installation sequence of the original valve cover assembly structure, starting from the upper part for installation, after the connecting pipe is installed, welding treatment is required, resulting in inconvenient later replacement, and thus increasing the processing cost.

[0003] In view of the above defects, the designer actively conducts research and innovation in order to create a valve cover bushing structure with a new structure applicable to a cryogenic valve, making it more valuable in industrial use. Content of the Utility Model

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a valve cover bushing structure applicable to a cryogenic valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A valve cover bushing structure applicable to a cryogenic valve, comprising a valve cover and a connecting pipe. The upper end of the valve cover is connected with the connecting pipe, the lower end of the valve cover is provided with an installation hole, a bushing is connected in the installation hole, the bushing is a bushing with an eccentric structure, and a retaining ring for positioning and fixing the bushing is connected in the installation hole.

[0007] Preferably, in the valve cover bushing structure applicable to a cryogenic valve, the connecting pipe and the valve cover are connected by welding.

[0008] Preferably, in the valve cover bushing structure applicable to a cryogenic valve, the retaining ring is a double-layer spiral retaining ring.

[0009] Preferably, in the valve cover bushing structure applicable to a cryogenic valve, the installation hole is an installation hole with an eccentric structure matching the bushing with an eccentric structure.

[0010] Preferably, in the valve cover bushing structure applicable to a cryogenic valve, the retaining ring is clamped in the installation hole.

[0011] By means of the above scheme, the utility model has at least the following advantages:

[0012] The utility model adopts a spigot with an eccentric structure for positioning in cooperation with a valve cover and a double-layer helical retaining ring for holes, which can achieve better sealing. Secondly, the design of the spigot is changed from upward installation to downward installation, which is more conducive to the installation of the valve cover assembly. Finally, the spigot is positioned by the double-layer helical retaining ring for holes, which can better facilitate the later replacement and achieve better sealing effect. The spigot of this structure is simple to disassemble, assemble and maintain.

[0013] The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the content of the specification, the following is a detailed description of the preferred embodiment of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic structural diagram of the existing device of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the spigot of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0020] Embodiment

[0021] As Figure 2 and Figure 3As shown in the figure, a valve cover screw sleeve structure applicable to cryogenic valves includes a valve cover 3 and a connecting pipe 4. The upper end of the valve cover 3 is connected to the connecting pipe 4. The lower end of the valve cover 3 is provided with a mounting hole 5. A screw sleeve 2 is connected in the mounting hole 5. The screw sleeve 2 is an eccentric screw sleeve. A retaining ring 1 for positioning and fixing the screw sleeve 2 is connected in the mounting hole 5.

[0022] In the present utility model, the connecting pipe 4 and the valve cover 3 are connected by welding.

[0023] In the present utility model, the retaining ring 1 is a double-layer spiral retaining ring.

[0024] In the present utility model, the mounting hole 5 is an eccentric mounting hole matching the eccentric screw sleeve.

[0025] The working principle of the present utility model is as follows:

[0026] During specific operation, the screw sleeve is installed from the mounting hole at the lower part of the valve cover. First, the eccentric screw sleeve 2 is installed in the mounting hole at the lower part of the valve cover 3. Then, the double-layer spiral retaining ring 1 is fixed in the mounting hole and is clamped with the mounting hole. Subsequently, the connecting pipe 4 is installed in the valve cover 3. Finally, welding treatment is carried out.

[0027] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, 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. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0031] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A valve cover screw sleeve structure suitable for a cryogenic valve, comprising a valve cover (3) and a connecting pipe (4), wherein the upper end of the valve cover (3) is connected to the connecting pipe (4), characterized in that: The lower end of the valve cover (3) is provided with a mounting hole (5), a screw sleeve (2) is connected to the mounting hole (5), the screw sleeve (2) is an eccentric screw sleeve, and a retaining ring (1) is connected to the mounting hole (5) for positioning and fixing the screw sleeve (2).

2. The valve cover screw sleeve structure suitable for a cryogenic valve according to claim 1, characterized in that: The connecting pipe (4) and the valve cover (3) are connected by welding.

3. The valve cover screw sleeve structure suitable for a cryogenic valve according to claim 1, characterized in that: The retaining ring (1) is a double-layer spiral retaining ring.

4. The valve cover screw sleeve structure suitable for a cryogenic valve according to claim 1, characterized in that: The mounting hole (5) is a mounting hole of the eccentric structure matching the eccentric structure screw sleeve.

5. A valve cover screw sleeve structure suitable for a cryogenic valve according to claim 1 or 3, characterized in that: The retaining ring (1) is clamped in the mounting hole.

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