Cold insulation structure of low-temperature valve of air separation cold box

Abstract

The utility model discloses a cold insulation structure of a low-temperature valve of an air separation cold box, which comprises a low-temperature valve body, a first shell and a second shell are respectively arranged on the front side and the rear side of the low-temperature valve body, arc-shaped protective layers are arranged in the first shell and the second shell, and arc-shaped thermal insulation layers are arranged on the inner sides of the two arc-shaped protective layers; and the positioning mechanism is used for pre-positioning the first shell and the second shell before assembly. Aiming at the use problem, the equipment is provided with the positioning mechanism, pre-positioning of the first shell and the second shell before installation can be realized, and the fixing block is locked by matching with bolts and nuts, so that the two shells are quickly connected, and meanwhile, the first shell, the second shell and the arc-shaped heat preservation layer can achieve the protection and cold insulation effects.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic valve cold insulation, in particular to a cold insulation structure for cryogenic valves in an air separation cold box. Background Technique

[0002] A cryogenic valve is a valve that can maintain stable performance at extremely low temperatures to ensure the safe and efficient operation of a fluid system. It is mainly applied in multiple fields such as liquefied natural gas, deep-sea oil and gas exploitation, and coal. It plays an irreplaceable role in a cryogenic fluid system.

[0003] Currently, when operating an air separation cold box, cryogenic valves are often used. Some cryogenic valves are directly exposed to the outside, which can easily cause the temperature of the cryogenic fluid in the cryogenic valve to be affected by external heat, leading to accidents. There are also some cryogenic valves with thermal insulation materials pasted on their surfaces, but the pasting installation and subsequent maintenance efficiency are relatively low, and they can only play a role in heat preservation for the cryogenic valve, lacking a certain degree of protection. Therefore, to solve these problems, designing a cold insulation structure for cryogenic valves in an air separation cold box is what we need to consider. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a cold insulation structure for cryogenic valves in an air separation cold box is proposed. In view of the usage problems, a positioning mechanism is set up, which can realize the pre-positioning of the first shell and the second shell before installation. With the cooperation of bolts and nuts to lock the fixing blocks, the quick connection between the two shells can be achieved. At the same time, the first shell, the second shell and the arc-shaped heat preservation layer can play a role in protection and cold insulation.

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

[0006] A cold insulation structure for cryogenic valves in an air separation cold box includes a cryogenic valve body. The front and rear sides of the cryogenic valve body are respectively provided with a first shell and a second shell. Arc-shaped protective layers are arranged in both the first shell and the second shell, and arc-shaped heat preservation layers are arranged on the inner sides of the two arc-shaped protective layers; a positioning mechanism, which is used for pre-positioning the first shell and the second shell before assembly.

[0007] Preferably, the positioning mechanism includes a first arc-shaped connecting block fixedly connected to the rear side of the first shell, a first arc-shaped inner groove is opened on the front side of the second shell, two second arc-shaped inner grooves are opened on the rear side of the first shell, and two second arc-shaped connecting blocks are fixedly connected to the front side of the second shell.

[0008] Preferably, the first arc-shaped connecting block cooperates with the first arc-shaped inner groove, and both of the two second arc-shaped connecting blocks cooperate with the corresponding second arc-shaped inner grooves.

[0009] Preferably, the upper ends of the first shell and the second shell are fixedly connected to two fixing blocks, and each of the fixing blocks is horizontally provided with a threaded through groove.

[0010] Preferably, bolts are threadedly connected in the two threaded through grooves located on the front side, and nuts are threadedly connected on the threaded ends of the two bolts.

[0011] Preferably, the two fixing blocks on the front side cooperate with the two fixing blocks on the rear side.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] A positioning mechanism is provided, and the first shell and the second shell can be pre-positioned before installation by aligning the first arc-shaped connecting block with the first arc-shaped inner groove and inserting it, and aligning the two second arc-shaped connecting blocks with the two second arc-shaped inner grooves and inserting them respectively. The fixing blocks are locked with the bolts and nuts to achieve a stable connection between the first shell and the second shell, and the arc-shaped thermal insulation layer can keep the low-temperature valve body cold. The whole installation process is quick and convenient, and also convenient for later maintenance. At the same time, the first shell and the second shell can also play a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cold preservation structure of a low-temperature valve of an air separation cold box proposed by the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the structure after removing the cryogenic valve body;

[0016] Figure 3 for Figure 2 rear view.

[0017] In the figure: 1 low-temperature valve body, 2 first shell, 3 second shell, 4 arc-shaped protective layer, 5 arc-shaped insulation layer, 6 first arc-shaped connecting block, 7 first arc-shaped inner groove, 8 second arc-shaped inner groove, 9 second arc-shaped connecting block, 10 fixing block, 11 threaded through groove, 12 bolt, 13 nut. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figures 1-3, A cold insulation structure for a cryogenic valve in an air separation cold box, including a cryogenic valve body 1. A first housing 2 and a second housing 3 are respectively arranged on the front and rear sides of the cryogenic valve body 1. Arc-shaped protective layers 4 are arranged in both the first housing 2 and the second housing 3. The arc-shaped protective layers 4 can prevent mechanical damage to the arc-shaped insulation layer 5. Arc-shaped insulation layers 5 are arranged on the inner sides of the two arc-shaped protective layers 4. The arc-shaped insulation layer 5 is made of polyurethane foam and can achieve a cold insulation effect by closely fitting with the cryogenic valve body 1;

[0020] Among them, a positioning mechanism is further included. The positioning mechanism is used for pre-positioning the first housing 2 and the second housing 3 before assembly. The positioning mechanism includes a first arc-shaped connecting block 6 fixedly connected to the rear side of the first housing 2. A first arc-shaped inner groove 7 is opened on the front side of the second housing 3. The first arc-shaped connecting block 6 and the first arc-shaped inner groove 7 are matched, and the first arc-shaped connecting block 6 can be inserted into the first arc-shaped inner groove 7. Two second arc-shaped inner grooves 8 are opened on the rear side of the first housing 2. Two second arc-shaped connecting blocks 9 are fixedly connected to the front side of the second housing 3. The two second arc-shaped connecting blocks 9 are both matched with the corresponding second arc-shaped inner grooves 8, and the two second arc-shaped connecting blocks 9 can be respectively inserted into the corresponding second arc-shaped inner grooves 8;

[0021] Among them, two fixing blocks 10 are fixedly connected to the upper ends of both the first housing 2 and the second housing 3. A threaded through groove 11 is horizontally opened on each fixing block 10. Bolts 12 are threadedly connected in the two threaded through grooves 11 on the front side. Nuts 13 are threadedly connected to the threaded ends of the two bolts 12. The two fixing blocks 10 on the front side and the two fixing blocks 10 on the rear side are matched. By the two bolts 12 and the two nuts 13, the two fixing blocks 10 on the front side and the two fixing blocks 10 on the rear side can be connected, thereby realizing the stable connection of the first housing 2 and the second housing 3.

[0022] In the present utility model, during use, first place the first housing 2 on the front side of the cryogenic valve body 1, place the second housing 3 on the rear side of the cryogenic valve body 1, then align the first arc-shaped connecting block 6 with the first arc-shaped inner groove 7 and insert it. At the same time, align the two second arc-shaped connecting blocks 9 with the two second arc-shaped inner grooves 8 respectively and insert them, so as to realize the pre-positioning of the first housing 2 and the second housing 3 before installation;

[0023] After the pre-positioning is completed, the bolt 12 on the left side passes through the threaded through slots 11 on the two fixing blocks 10 on the left side, and then a tool is used to lock the corresponding nut 13 with the bolt 12. Similarly, the bolt 12 on the right side passes through the two threaded through slots 11 on the right side and is locked with the corresponding nut 13. In this way, the stable installation of the first housing 2 and the second housing 3 is completed. During the installation process, the arc-shaped heat insulation layer 5 will closely fit with the cryogenic valve body 1, thereby achieving a cold insulation effect. The entire installation process is convenient and fast, and it is also convenient for subsequent maintenance. Moreover, the first housing 2 and the second housing 3 can also protect the cryogenic valve body 1.

[0024] The above is only a preferred specific embodiment 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, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A cold insulation structure for a cryogenic valve in an air separation cold box, characterized in that, Comprising: A cryogenic valve body (1), with a first housing (2) and a second housing (3) respectively arranged on the front and rear sides of the cryogenic valve body (1). Arc-shaped protective layers (4) are arranged in both the first housing (2) and the second housing (3), and arc-shaped heat-insulating layers (5) are arranged on the inner sides of the two arc-shaped protective layers (4); A positioning mechanism for pre-positioning the first housing (2) and the second housing (3) before assembly. The positioning mechanism includes a first arc-shaped connecting block (6) fixedly connected to the rear side of the first housing (2). A first arc-shaped inner groove (7) is formed on the front side of the second housing (3). The first arc-shaped connecting block (6) cooperates with the first arc-shaped inner groove (7). Two second arc-shaped inner grooves (8) are formed on the rear side of the first housing (2), and two second arc-shaped connecting blocks (9) are fixedly connected to the front side of the second housing (3). The two second arc-shaped connecting blocks (9) both cooperate with the corresponding second arc-shaped inner grooves (8).

2. The cold insulation structure of a low-temperature valve for an air separation cold box according to claim 1, wherein Two fixing blocks (10) are fixedly connected to the upper ends of both the first housing (2) and the second housing (3), and a threaded through groove (11) is horizontally formed on each fixing block (10).

3. The cold insulation structure of a low-temperature valve for an air separation cold box according to claim 2, characterized in that, Bolts (12) are threadedly connected in the two threaded through grooves (11) located on the front side, and nuts (13) are threadedly connected to the threaded ends of the two bolts (12).

4. The cold insulation structure of a low-temperature valve for an air separation cold box according to claim 2, characterized in that, The two fixing blocks (10) located on the front side cooperate with the two fixing blocks (10) located on the rear side.

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