Heat insulation device for valve heat preservation sleeve in air separation cold box

Abstract

The utility model discloses a heat insulation device for a valve heat preservation sleeve in an air separation cold box, and belongs to the technical field of valve heat insulation. A valve heat preservation sleeve heat insulation device used in an air separation cold box comprises a valve body, an inner cavity of the valve body is fixedly connected with a valve seat, according to the valve heat preservation sleeve heat insulation device used in the air separation cold box, by arranging a heat insulation assembly, the bottom of a heat preservation sleeve is filled with compacted pearlife, and the middle of the heat preservation sleeve is filled with heat preservation cotton; the top is sealed by a foaming agent, a multi-layer heat insulation structure is formed, the problem that a valve cover is frosted due to the fact that traditional single heat preservation cotton is not filled compactly is effectively solved, meanwhile, by arranging a sealing assembly, the device can be sealed, external air is prevented from entering the device through a gap between the valve rod and the connecting pipe, and the service life of the device is prolonged. Therefore, the phenomenon that the low-temperature liquid is gasified and frosted after encountering the air is further avoided, the problem of cold leakage of the cold box is basically eliminated, and the energy consumption performance of the whole cold box is also greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of valve insulation technology, and more specifically, to a valve insulation sleeve insulation device for use in air separation cold boxes. Background Technology

[0002] In air separation units, aluminum angle valves in cold boxes are generally not installed vertically; their installation position is close to horizontal with the pipes inside the cold box. The conventional practice for the insulation sleeves of valves inside the air separation cold box is to fill them with insulation cotton for heat insulation and cold preservation. However, the insulation cotton cannot be compacted during the filling process, which affects the insulation effect of the valve sleeve. The low-temperature liquid medium inside the cold box leaks into the hollow part of the upper valve cover through the valve cover guide sleeve and valve core guide, forming liquid accumulation. When the low-temperature liquid comes into contact with air, it will vaporize and frost, causing the air separation cold box to lose cold, thereby increasing the energy loss of the air separation unit and reducing the practical performance of the unit. Based on this, this utility model designs an insulation device for the valve insulation sleeves inside the air separation cold box to solve the above problems. Utility Model Content

[0003] 1. Technical problems to be solved

[0004] The purpose of this utility model is to provide a heat insulation device for valve insulation sleeves in air separation cold boxes, so as to solve the problems mentioned in the background art.

[0005] 2. Technical Solution

[0006] A heat insulation device for a valve insulation sleeve in an air separation cold box includes a valve body, a valve seat fixedly connected to the inner cavity of the valve body, a valve core movably connected to the inner cavity of the valve seat, an upper valve cover slidably connected to the outer side of the valve core, the upper valve cover being fixedly connected to the valve body, and a heat insulation component being provided on the outer side of the upper valve cover. A connecting pipe is fixedly connected above the upper valve cover, the connecting pipe passing through the heat insulation component and connecting to a sealing component, and a valve stem is fixedly connected above the valve core, the valve stem passing through the sealing component and extending outward.

[0007] The insulation component includes an insulation sleeve fixedly connected to the outside of the upper valve cover. The bottom of the inner cavity of the insulation sleeve is filled with perlite, and the top of the perlite is filled with insulation cotton. An installation plate is fixedly connected to the top of the insulation sleeve. A clamp one is fixedly connected to the outside of the installation plate. A floating sleeve is fixedly connected to the outside of the clamp one. A clamp two is fixedly connected to the side of the floating sleeve away from the clamp one. A fixing member is fixedly connected to the inner cavity of the clamp two. The fixing member is fixedly connected to the connecting pipe.

[0008] Preferably, a foaming agent is filled on top of the insulation cotton, and the foaming agent is in contact with the floating sleeve.

[0009] Preferably, the sealing assembly includes a fixed sleeve fixedly connected to the top end of the connecting pipe, the inner cavity of the fixed sleeve is provided with an installation groove, the bottom of the installation groove is fixedly connected with a packing seat, the top of the packing seat is filled with a packing element, the top end of the fixed sleeve is provided with an installation component, and the packing element is in contact with the installation component.

[0010] Preferably, the installation assembly includes a packing pressure plate fixedly connected to the top of the fixed sleeve, a pressure plate bolt threaded to the outer side of the packing pressure plate, and a packing gland rotatably connected to the bottom end of the pressure plate bolt, the packing gland fitting against the packing component.

[0011] 3. Beneficial effects

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] In this invention, by setting up an insulation component, the device forms a multi-layer insulation structure by filling the bottom of the insulation sleeve with compacted perlite, the middle with insulation cotton, and sealing the top with foaming agent. This effectively solves the problem of valve cover frost caused by the inadequate filling of traditional single insulation cotton. At the same time, by setting up a sealing component, the device can be sealed to prevent outside air from entering through the gap between the valve stem and the connecting pipe. This further avoids the phenomenon of vaporization and frost when the low-temperature liquid comes into contact with air, thereby basically eliminating the problem of cold box leakage and greatly improving the energy efficiency of the entire cold box. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the thermal insulation sleeve structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the valve body structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the sealing component structure of this utility model.

[0018] The following are the labels in the diagram: 1. Valve body; 2. Valve seat; 3. Valve core; 4. Valve stem; 5. Upper valve cover; 6. Insulation component; 61. Insulation sleeve; 62. Perlite; 63. Insulation cotton; 64. Foaming agent; 65. Mounting plate; 66. Clamp one; 67. Floating sleeve; 68. Clamp two; 69. Fixing component; 7. Sealing component; 71. Fixing sleeve; 72. Mounting groove; 73. Packing seat; 74. Packing component; 75. Packing gland; 76. Packing pressure plate; 77. Pressure plate bolt; 8. Connecting pipe. Detailed Implementation

[0019] Example: Please refer to Figure 1-4 A heat insulation device for valve insulation sleeves in an air separation cold box includes a valve body 1. A valve seat 2 is fixedly connected to the inner cavity of the valve body 1. A valve core 3 is movably connected to the inner cavity of the valve seat 2. An upper valve cover 5 is slidably connected to the outer side of the valve core 3. The upper valve cover 5 is fixedly connected to the valve body 1, and a heat insulation component 6 is provided on the outer side of the upper valve cover 5. By setting the heat insulation component 6, a multi-layer heat insulation structure is formed, which effectively solves the problem of valve cover frost caused by the inadequate filling of traditional single heat insulation cotton. A connecting pipe 8 is fixedly connected to the upper valve cover 5. The connecting pipe 8 passes through the heat insulation component 6 and is connected to a sealing component 7. By setting the sealing component 7, outside air is prevented from entering through the gap between the valve stem 4 and the connecting pipe 8, further avoiding the phenomenon of vaporization and frost when the low temperature liquid encounters air, thereby greatly improving the energy efficiency of the entire cold box. A valve stem 4 is fixedly connected to the upper side of the valve core 3. The valve stem 4 passes through the sealing component 7 and extends outward.

[0020] The insulation component 6 includes an insulation sleeve 61 fixedly connected to the outside of the upper valve cover 5. The bottom of the inner cavity of the insulation sleeve 61 is filled with perlite 62, the particle size of which is required to be between 20-40 mesh. The perlite 62 is filled to 1 / 3 of the entire insulation sleeve 61 and compacted. Insulation cotton 63 is filled on top of the perlite 62. During the installation process, it is filled and compacted simultaneously to ensure compaction. The filling continues until it reaches 20 cm from the edge of the insulation sleeve 61, at which point the filling of insulation cotton stops. An installation plate 65 is fixedly connected to the top of the insulation sleeve 61, and a clip is fixedly connected to the outside of the installation plate 65. A clamp 66 is fixedly connected to the outer side of the clamp 66, and a second clamp 68 is fixedly connected to the side of the floating sleeve 67 away from the clamp 66. A fixing member 69 is fixedly connected to the inner cavity of the second clamp 68, and the fixing member 69 is fixedly connected to the connecting pipe 8. In order to isolate the inside of the insulation sleeve from the outside air, a foaming agent 64 is filled on top of the insulation cotton 63. The foaming agent 64 is in contact with the floating sleeve 67, and the foaming agent 64 seals the insulation sleeve 61, isolating the inside of the insulation sleeve 61 from the outside air and forming a vacuum state.

[0021] By setting up the insulation component 6, the device forms a multi-layer insulation structure by filling the bottom of the insulation sleeve 61 with compacted perlite 62, filling the middle with insulation cotton 63, and sealing the top with foaming agent 64. This effectively solves the problem of valve cover frost caused by the traditional single insulation cotton not being properly filled.

[0022] The sealing assembly 7 includes a fixed sleeve 71 fixedly connected to the top end of the connecting pipe 8. The inner cavity of the fixed sleeve 71 has an installation groove 72. A packing seat 73 is fixedly connected to the bottom of the installation groove 72. A packing element 74, which is a sealing material, is filled above the packing seat 73. An installation component is provided at the top end of the fixed sleeve 71. The packing element 74 fits into the installation component. The installation component includes a packing pressure plate 76 fixedly connected to the top end of the fixed sleeve 71. A pressure plate bolt 77 is threadedly connected to the outer side of the packing pressure plate 76. A packing gland 75 is rotatably connected to the bottom end of the pressure plate bolt 77. The packing gland 75 fits into the packing element 74. By pushing the packing gland 75 downward by the pressure plate bolt 77, the packing gland 75 compacts and fits the packing element 74, thereby sealing the device.

[0023] By setting the sealing component 7, the device can be sealed to prevent outside air from entering through the gap between the valve stem 4 and the connecting pipe 8, thereby further avoiding the phenomenon of vaporization and frost when the cryogenic liquid comes into contact with air, thus basically eliminating the problem of cold box leakage, and greatly improving the energy efficiency of the entire cold box.

[0024] The working principle of this practical feature:

[0025] First, a layer of perlite 62 with a particle size of 20-40 mesh is filled into the bottom of the insulation sleeve 61, filling 1 / 3 of the insulation sleeve 61 and compacting it. Then, insulation cotton 63 is filled on top of the perlite 62, and it is compacted while filling to ensure it is tight. When the insulation cotton is filled to 20 cm from the edge of the insulation sleeve 61, the filling is stopped. Then, foaming agent 64 is filled 20 cm from the edge of the insulation cotton 63. The foaming agent 64 can be a polyurethane foaming agent. The foaming agent 64 seals the insulation sleeve 61, isolating the inside of the insulation sleeve 61 from the outside air and forming a vacuum state. This effectively solves the problem of valve cover frost caused by the traditional single insulation cotton not being properly filled.

[0026] Then, the packing element 74 is filled on top of the packing seat 73, and the pressure plate bolt 77 is rotated. At this time, the pressure plate bolt 77 will move downward on the packing pressure plate 76, thereby pushing the packing gland 75 downward, so that the packing gland 75 compacts and fits the packing element 74, thereby sealing the device and preventing outside air from entering through the gap between the valve stem 4 and the connecting pipe 8. This further avoids the phenomenon of vaporization and frost when the cryogenic liquid comes into contact with air, thus basically eliminating the problem of cold box leakage, and greatly improving the energy consumption performance of the entire cold box.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heat insulation device for valve thermal sleeve in air separation cold box, comprising a valve body (1), characterized in that: The inner cavity of the valve body (1) is fixedly connected with a valve seat (2), the inner cavity of the valve seat (2) is movably connected with a valve core (3), the outer side of the valve core (3) is slidably connected with an upper valve cover (5), the upper valve cover (5) is fixedly connected with the valve body (1), and the outer side of the upper valve cover (5) is provided with a heat insulation assembly (6), the upper side of the upper valve cover (5) is fixedly connected with a connecting pipe (8), the upper side of the valve core (3) is fixedly connected with a valve rod (4), and the valve rod (4) penetrates through the connecting pipe (8) and extends outward.

2. The thermal insulation device for the valve sleeve in the air separation cold box according to claim 1, characterized in that: The heat insulation assembly (6) comprises a heat preservation sleeve (61) fixedly connected to the outer side of the upper valve cover (5), the bottom of the inner cavity of the heat preservation sleeve (61) is filled with pearlite (62), the upper side of the pearlite (62) is filled with heat preservation cotton (63), the upper side of the heat preservation sleeve (61) is fixedly connected with a mounting plate (65), the outer side of the mounting plate (65) is fixedly connected with a clamp (66), the outer side of the clamp (66) is fixedly connected with a floating sleeve (67), the side of the floating sleeve (67) away from the clamp (66) is fixedly connected with a clamp (68), the inner cavity of the clamp (68) is fixedly connected with a fixing piece (69), and the fixing piece (69) is fixedly connected with the connecting pipe (8).

3. A thermal insulation device for valve sleeves in cold boxes according to claim 2, characterized in that: The upper side of the heat preservation cotton (63) is filled with a foaming agent (64), and the foaming agent (64) is attached to the floating sleeve (67).

4. The thermal insulation device for the valve sleeve in the air- cooled tank according to claim 3, characterized in that: The foaming agent (64) is a polyurethane foaming agent.

5. The thermal insulation device for the valve sleeve in the air- cooled tank according to claim 1, characterized in that: The connecting pipe (8) penetrates through the heat insulation assembly (6) and is connected with a sealing assembly (7).

6. A thermal insulation device for valve sleeves in cold boxes according to claim 5, characterized in that: The sealing assembly (7) comprises a fixed sleeve (71) fixedly connected to the top end of the connecting pipe (8), the inner cavity of the fixed sleeve (71) is provided with a mounting groove (72), the bottom of the mounting groove (72) is fixedly connected with a filler seat (73), the upper side of the filler seat (73) is filled with a filler piece (74), the top end of the fixed sleeve (71) is provided with a mounting assembly, and the filler piece (74) is attached to the mounting assembly.

7. A thermal insulation device for valve sleeves in cold boxes according to claim 6, characterized in that: The mounting assembly comprises a filler pressing plate (76) fixedly connected to the top end of the fixed sleeve (71), the outer side of the filler pressing plate (76) is threadedly connected with a pressing plate bolt (77), the bottom end of the pressing plate bolt (77) is rotatably connected with a filler pressing cover (75), and the filler pressing cover (75) is attached to the filler piece (74).

8. A thermal insulation device for valve sleeves in cold boxes according to claim 6, characterized in that: The filler piece (74) is a sealing material.

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