Expansion machine isolation box

Abstract

The utility model provides an expansion machine isolation box which comprises a gas expansion machine, the gas expansion machine is installed on one side of the surface of an expansion machine cold box, an isolation frame is fixedly arranged in the position, internally connected with the gas expansion machine, of the expansion machine cold box, the periphery of the isolation frame is closed, and an isolation cavity with an outward opening is formed in the isolation frame. An isolation cavity is formed in the expansion machine cold box, one end of the gas expansion machine extends into the isolation cavity, and a fixing iron plate is arranged at the connecting position of the expansion machine cold box and the gas expansion machine. And it can be guaranteed that the flange tightening overhaul work in the expansion machine can be conducted without removing all pearlife in a cold box, independent disassembly can be conducted, and the overhaul efficiency of the interior of the expansion machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air separation manufacturing, in particular to an expansion machine isolation box. Background Art

[0002] In order to liquefy air, different deep refrigeration cycle devices can be used, mainly based on the Linde cycle and the Claude cycle. The former is refrigeration through throttling expansion; the latter, in addition to throttling expansion, also has a part of the gas undergoing isentropic expansion in the expander.

[0003] When throttling expansion is performed, the cold box needs to be filled with pearl sand during normal use, and the internal temperature can drop to -190°C. The cooling process may cause the internal flange of the expander to expand and contract due to heat and cold, resulting in air leakage. At this time, when performing cold box maintenance, it is usually necessary to empty all the pearl sand in the cold box before tightening the flange bolts, which will reduce the maintenance efficiency inside the cold box. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides an expander isolation box, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: an expander isolation box, including a gas expander, which is installed on one side of the surface of an expander cold box, and an isolation frame is fixedly provided inside the internal connection position of the expander cold box and the gas expander. The isolation frame is closed on all sides and has an isolation cavity opening outward, one end of the gas expander extends into the isolation cavity, and a fixed iron plate is provided at the connection position between the expander cold box and the gas expander, and a bakelite board is installed on the surface of the fixed iron plate, and the bakelite board is connected to the fixed iron plate and the expander cold box through a fixed flange, and the bakelite board has a cold insulation effect on the gas expander.

[0008] Preferably, a core is provided at the head of the gas expander, and a body is provided at one end of the gas expander and located inside the isolation cavity.

[0009] Preferably, one end of the machine body is connected with two aluminum tubes, and a connecting flange is installed between the aluminum tube and the machine body.

[0010] Preferably, an isolation cavity is installed at one open end of the isolation frame, and a connecting flange is installed and connected between the isolation cavity and the isolation frame.

[0011] Preferably, an aluminum plate is fixedly provided at one end of the isolation cavity, a through hole is provided on the surface of the aluminum plate, a sealing rubber plate is provided on one side of the aluminum plate, and the aluminum tube passes through the aluminum plate and the sealing rubber plate into the isolation cavity and is connected with the body.

[0012] Preferably, the upper end surface of the isolation frame is connected to a feed pipe opening outward, the feed pipe is curved, and a detachable feed cover is installed on the top of the feed pipe.

[0013] Preferably, a discharge pipe opening outward is provided at the bottom of the isolation frame, the discharge pipe is curved, and a detachable discharge sealing plate is installed on the top of the discharge pipe.

[0014] (III) Beneficial effects

[0015] The utility model provides an expander isolation box, which has the following beneficial effects:

[0016] 1. This solution sets up an isolation box inside the gas expander to ensure that when the flange of the gas expander is inspected and repaired, the flange inside the expander can be tightened and repaired by removing all the pearl sand, and it can be disassembled separately, thereby improving the maintenance efficiency inside the expander. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0018] Figure 2 It is a top view of the appearance structure of the utility model.

[0019] In the figure: 101, expander cold box; 102, discharge pipe; 103, discharge sealing plate; 104, fixed iron plate; 105, bakelite board; 106, fixed flange; 107, gas expander; 108, feed pipe; 109, feed cover plate; 110, isolation chamber; 111, sealing rubber plate; 112, aluminum tube; 113, aluminum plate; 114, connecting flange; 115, machine body; 116, isolation frame; 117, movement. DETAILED DESCRIPTION

[0020] The utility model provides an expander isolation box, such as Figure 1-2As shown, it includes a gas expander 107, which is installed on one side of the surface of the expander cold box 101. An isolation frame 116 is fixed inside the internal connection position of the expander cold box 101 and the gas expander 107. The isolation frame 116 is closed on all sides and is provided with an isolation cavity 110 opening outward. One end of the gas expander 107 extends into the isolation cavity 110. A fixed iron plate 104 is provided at the connection position between the expander cold box 101 and the gas expander 107. A bakelite board 105 is installed on the surface of the fixed iron plate 104. The bakelite board 105 is connected to the fixed iron plate 104 and the expander cold box 101 through a fixed flange 106. The bakelite board 105 has a cold insulation effect on the gas expander 107.

[0021] It should be further explained that the isolation frame 116 is a frame structure, and the four sides of the frame are sealed by iron plates to form an independent isolation cavity 110.

[0022] like Figure 2 As shown, a core 117 is disposed at the head of the gas expander 107 , and a body 115 is disposed at one end of the gas expander 107 and located inside the isolation chamber 110 .

[0023] Furthermore, two aluminum tubes 112 are connected to one end of the machine body 115 , and a connecting flange 114 is installed and connected between the aluminum tube 112 and the machine body 115 .

[0024] It should be noted that the connecting flange 114 is detachable.

[0025] Furthermore, an isolation cavity 110 is installed at one open end of the isolation frame 116 , and a connecting flange 114 is installed and connected between the isolation cavity 110 and the isolation frame 116 .

[0026] Furthermore, an aluminum plate 113 is fixedly provided at one end of the isolation chamber 110, a through hole is provided on the surface of the aluminum plate 113, a sealing rubber plate 111 is provided on one side of the aluminum plate 113, and the aluminum tube 112 passes through the aluminum plate 113 and the sealing rubber plate 111 into the isolation chamber 110 and is connected with the body 115.

[0027] It is worth further explaining that the sealing rubber plate 111 and the bakelite board 105 are made of cold-insulating materials.

[0028] Furthermore, the upper end surface of the isolation frame 116 is connected to a feed pipe 108 opening outward, the feed pipe 108 is curved, and a detachable feed cover plate 109 is installed on the top of the feed pipe 108 .

[0029] Furthermore, the bottom of the isolation frame 116 is connected to a discharge pipe 102 opening outward, the discharge pipe 102 is curved, and a detachable discharge sealing plate 103 is installed on the top of the discharge pipe 102 .

[0030] When using this solution, the gas expander 107 is installed on the expander cold box 101. At this time, a frame structure is made of angle iron inside, and iron plates are used to seal the four sides of the frame to form an isolation frame 116, thereby forming an independent and closed isolation chamber 110.

[0031] At this time, the gas expander 107 and the expander cold box 101 are connected with an auxiliary installation through a fixed iron plate 104. At this time, a bakelite board 105 is fixed at one end of the fixed iron plate 104 and one end of the sealing rubber plate 111, so as to facilitate the fixed connection between the gas expander 107 and the aluminum tube 112. At the same time, the fixed iron plate 104 and the sealing rubber plate 111 are used for cold insulation to prevent excessively low temperature from being transmitted to the surface of the expander cold box 101, thereby causing the outer wall to freeze and crack.

[0032] At this time, a feed pipe 108 and a discharge pipe 102 are welded to the upper and lower walls of the isolation frame 116, which are connected to the outer wall of the expander cold box 101, and are closed by a feed cover plate 109 and a discharge sealing plate 103, so that the filling and discharge of the pearlescent sand in the isolation chamber 110 can be independently realized from the outside.

[0033] The back of the expander cold box 101 is opened and a square plate is installed for easy disassembly. When the gas expander 107 is to be inspected and repaired, the square plate can be directly removed and the sealing rubber plate 111 can be removed to conveniently inspect the flange.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An expander isolation box, characterized in that: The invention comprises a gas expander (107), wherein the gas expander (107) is installed on one side of the surface of the expander cold box (101), an isolation frame (116) is fixedly provided inside the internal connection position of the expander cold box (101) and the gas expander (107), the isolation frame (116) is closed on all sides and is provided with an isolation cavity (110) opening outward, one end of the gas expander (107) extends into the isolation cavity (110), a fixed iron plate (104) is provided at the connection position between the expander cold box (101) and the gas expander (107), a bakelite board (105) is installed on the surface of the fixed iron plate (104), the bakelite board (105) is connected to the fixed iron plate (104) and the expander cold box (101) via a fixed flange (106), and the bakelite board (105) has a cold insulation effect on the gas expander (107).

2. The expander isolation box according to claim 1, characterized in that: The head of the gas expander (107) is provided with a core (117), and one end of the gas expander (107) and located inside the isolation chamber (110) is provided with a body (115).

3. The expander isolation box according to claim 2, characterized in that: One end of the machine body (115) is connected to two aluminum tubes (112), and a connecting flange (114) is installed and connected between the aluminum tubes (112) and the machine body (115).

4. The expander isolation box according to claim 1, characterized in that: An isolation chamber (110) is installed at one open end of the isolation frame (116), and a connecting flange (114) is installed and connected between the isolation chamber (110) and the isolation frame (116).

5. The expander isolation box according to claim 3, characterized in that: An aluminum plate (113) is fixedly provided at one end of the isolation chamber (110), a through hole is provided on the surface of the aluminum plate (113), a sealing rubber plate (111) is provided on one side of the aluminum plate (113), and the aluminum tube (112) passes through the aluminum plate (113) and the sealing rubber plate (111) to enter the isolation chamber (110) and communicate with the machine body (115).

6. The expander isolation box according to claim 1, characterized in that: The upper end surface of the isolation frame (116) is connected to a feed pipe (108) opening outward, and a feed cover plate (109) is installed on the top of the feed pipe (108).

7. The expander isolation box according to claim 1, characterized in that: The bottom of the isolation frame (116) is connected to a discharge pipe (102) opening outward, and the top of the discharge pipe (102) is provided with a discharge sealing plate (103).

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