Regenerative filler sealing device and cold finger structure

Abstract

The invention discloses a heat regeneration packing sealing device and a cold finger structure, and relates to the technical field of heat regeneration type refrigerators, the heat regeneration packing sealing device comprises a sealing wire mesh, a sleeve and a pressing ring, the sleeve is used for sleeving a pulse tube, the axis of the sleeve and the axis of the pulse tube can be kept parallel, one end of the sleeve is used for stretching into a shell of a heat regenerator, and the other end of the sleeve is used for pressing the pressing ring. The pressing ring sleeves and is fixedly connected outside the sleeve, the mesh size of the sealing screen mesh is smaller than the particle size of the heat regeneration filler, the sealing screen mesh sleeves the sleeve and is located in the heat regenerator, the sealing screen mesh can cover an annular opening in the bottom of the heat regenerator, and the downward side of the pressing ring can tightly press the sealing screen mesh on the air outlet end of the heat exchanger. According to the backheating filler sealing device and the cold finger structure, the backheating filler is not prone to leakage, and the sealing effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of heat regenerative refrigerators, and in particular to a heat regenerative packing sealing device and a cold finger structure. Background Art

[0002] At present, in a regenerative refrigerator, the regenerative filler in the regenerator at the cold finger structure is generally sealed by a sealing net, wherein the sealing net is arranged at an opening at one end of the shell and has an interference fit with the shell, and the regenerative filler is sealed in the shell by the sealing net. When the refrigerator is running, the pulse tube is inserted into the heat exchanger, and the sealing net is close to the air outlet end of the heat exchanger. A slit is arranged on the air outlet end. The gas is discharged from the air outlet end of the heat exchanger, passes through the regenerative filler and the sealing net, and then enters the regenerator. However, during the operation of the regenerative refrigerator, vibration or tilting is prone to occur. These factors may cause the sealing net to tilt and the interference fit between the regenerator shell and the shell to be destroyed, thereby causing leakage of the regenerative filler. Therefore, there is an urgent need for a regenerative filler sealing device and a cold finger structure with better sealing effect. Summary of the invention

[0003] The purpose of the present invention is to provide a heat recovery packing sealing device and a cold finger structure to solve the problems existing in the prior art, so that the heat recovery packing is not easy to leak and the sealing effect is better.

[0004] To achieve the above object, the present invention provides the following solutions: The present invention provides a heat recovery packing sealing device, comprising: a sealing wire mesh, a sleeve and a pressure ring, the sleeve is used to be sleeved outside the pulse tube, the axis of the sleeve can be kept parallel to the axis of the pulse tube, one end of the sleeve is used to extend into the shell of the heat exchanger, the pressure ring is sleeved and fixedly connected to the outside of the sleeve, the mesh size of the sealing wire mesh is smaller than the particle size of the heat recovery packing, the sealing wire mesh is sleeved outside the sleeve and located in the heat exchanger, the side of the sealing wire mesh used for downward is flush with the end surface of the bottom end of the heat exchanger, the cross-sectional size of the sealing wire mesh in a direction perpendicular to the axial direction of the pulse tube is the same as the size of the bottom opening of the heat exchanger, the sealing wire mesh can cover the annular opening at the bottom of the heat exchanger, the side of the pressure ring used for downward can press the sealing wire mesh tightly against the gas outlet end of the heat exchanger, and the gas in the heat exchanger can pass through the plane where the sealing wire mesh and the pressure ring are located in sequence and enter the heat exchanger.

[0005] In some embodiments, one end of the sleeve away from the regenerator is flush with the bottom end of the pulse tube or farther away from the regenerator than the bottom end of the pulse tube.

[0006] In some embodiments, one end of the sleeve away from the regenerator is flush with the bottom end of the pulse tube, and one end of the sleeve away from the regenerator is provided with a connecting structure, and the connecting structure is used to connect the guide wire mesh.

[0007] In some embodiments, the inner wall of the sleeve is in close contact with the outer wall of the vessel.

[0008] In some embodiments, the cross-sectional dimension of the pressure ring in a direction perpendicular to the axial direction of the sleeve is the same as the dimension of the bottom opening of the regenerator, and a vent is provided on the pressure ring.

[0009] In some embodiments, the sleeve and the sealing mesh are both made of stainless steel.

[0010] In some embodiments, the pressure ring includes an inner ring, an outer ring and a plurality of support rods, the outer ring is sleeved outside the inner ring, each of the support rods is arranged between the inner ring and the outer ring, one end of the support rod is fixedly connected to the outer ring, and the other end is fixedly connected to the inner ring, the inner circumferential edge of the inner ring is used to be fixedly connected to the sleeve, and there is a gap between two adjacent support rods to form the vent.

[0011] In some embodiments, the support rods are arranged in sequence at equal intervals along the circumference of the inner ring.

[0012] In some embodiments, the sleeve and the pressure ring are both configured to be coaxially disposed with the vessel.

[0013] The present invention also provides a cold finger structure, comprising: a pulse tube, a regenerator and the above-mentioned heat recovery filler sealing device, the pulse tube is fixedly connected in the regenerator and one end extends from the bottom of the regenerator, an annular opening is formed between the bottom of the regenerator shell and the pulse tube, the sleeve is sleeved outside the pulse tube, the sealing mesh covers the opening at the bottom of the regenerator shell, the pulse tube and the regenerator shell are filled with heat recovery filler, the sleeve and the pulse tube are used to be inserted into the hole at the air outlet end of the heat exchanger, and the pressure ring presses the sealing mesh onto the air outlet end of the heat exchanger.

[0014] Compared with the prior art, the present invention has achieved the following technical effects: The heat recovery packing sealing device provided by the present invention, when installed, firstly, a pressure ring is sleeved and fixedly connected to the outside of the sleeve, then the sleeve is sleeved outside the pulse tube and the axis of the sleeve is kept parallel to the axis of the pulse tube, then a sealing wire mesh is arranged on the outside of the sleeve, and the sleeve and the pulse tube are inserted into the holes at the air outlet end of the heat exchanger, so that one side of the pressure ring presses the sealing wire mesh tightly against the air outlet end of the heat exchanger, and when the gas in the heat exchanger enters the inside of the heat exchanger, the sealing wire mesh can seal the heat recovery packing in the heat exchanger, and compared with the sealing net with an interference fit with the outer shell of the heat exchanger, since the axes of the sleeve and the pulse tube are kept parallel, under the limiting action of the sleeve, the axis of the pressure ring can also be kept parallel to the sleeve, so the pressure ring will not tilt during the operation of the heat recovery refrigerator, the heat recovery packing will not easily leak, and the sealing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 Schematic diagram of the cold finger structure in some embodiments of the present invention; Figure 2 for Figure 1 Top view of the medium pressure ring; In the figure: 1. sleeve; 2. sealing wire mesh; 3. pressure ring; 31. inner ring; 32. outer ring; 33. support rod; 34. vent; 4. guide wire mesh; 5. pulse tube; 6. regenerator; 7. regenerator filler. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The purpose of the present invention is to provide a heat recovery packing sealing device and a cold finger structure to solve the problems existing in the prior art, so that the heat recovery packing is not easy to leak and the sealing effect is better.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment 1 This embodiment provides a heat recovery packing sealing device, such as Figure 1-2 As shown, it includes: a sealing screen 2, a sleeve 1 and a pressure ring 3. The sleeve 1 is used to be sleeved outside the pulse tube 5. The axis of the sleeve 1 can be kept parallel to the axis of the pulse tube 5. One end of the sleeve 1 is used to extend into the shell of the regenerator 6. The pressure ring 3 is sleeved and fixedly connected to the outside of the sleeve 1. The mesh size of the sealing screen 2 is smaller than the particle size of the regenerator filler 7. The sealing screen 2 is sleeved outside the sleeve 1 and located in the regenerator 6. The side of the sealing screen 2 facing downward is flush with the end surface of the bottom end of the regenerator 6. The cross-sectional size of the sealing screen 2 in a direction perpendicular to the axial direction of the pulse tube 5 is the same as the size of the bottom opening of the regenerator 6. The sealing screen 2 can cover the annular opening at the bottom of the regenerator 6. The side of the pressure ring 3 facing downward can press the sealing screen 2 tightly against the gas outlet end of the heat exchanger. The gas in the heat exchanger can pass through the planes where the sealing screen 2 and the pressure ring 3 are located in sequence and enter the regenerator.

[0021] When installing the heat recovery packing sealing device provided in this embodiment, the pressure ring 3 is first sleeved and fixedly connected to the outside of the sleeve 1, and then the sleeve 1 is sleeved outside the pulse tube 5 so that the axis of the sleeve 1 is kept parallel to the axis of the pulse tube 5. Then, a sealing screen 2 is arranged on the outside of the sleeve 1, and the sleeve 1 and the pulse tube 5 are inserted into the holes at the air outlet end of the heat exchanger, so that one side of the pressure ring 3 presses the sealing screen 2 tightly against the air outlet end of the heat exchanger. When the gas in the heat exchanger enters the inside of the heat exchanger 6, the sealing screen 2 can seal the heat recovery packing 7 in the heat exchanger 6. Moreover, compared with the sealing net that is interference fit with the outer shell of the heat exchanger 6, since the axes of the sleeve 1 and the pulse tube 5 are kept parallel, under the limiting action of the sleeve 1, the axis of the pressure ring 3 can also be kept parallel to the sleeve 1, the pressure ring 3 will not tilt during the operation of the heat recovery refrigerator, the heat recovery packing 7 is not easy to leak, and the sealing effect is better.

[0022] In one implementation of this embodiment, one end of the sleeve 1 away from the regenerator 6 is flush with the bottom end of the pulse tube 5 or farther away from the regenerator 6 than the bottom end of the pulse tube 5 .

[0023] In one implementation of this embodiment, one end of the sleeve 1 away from the regenerator 6 is flush with the bottom end of the pulse tube 5, and one end of the sleeve 1 away from the regenerator 6 is provided with a connection structure, which is used to connect the guide wire mesh 4. The connection structure can facilitate the installation of the guide wire mesh 4. Among them, the connection structure is preferably a flange extending from the bottom end of the sleeve to the central axis of the sleeve, and the circumferential edge of the guide wire mesh 4 is fixedly connected to the flange.

[0024] In one implementation of this embodiment, the inner wall of the sleeve 1 is tightly fitted with the outer wall of the pulse tube 5. The inner wall of the sleeve 1 is tightly fitted with the outer wall of the pulse tube 5, which can not only keep the axes of the sleeve 1 and the pulse tube 5 parallel, but also block the gap between the sleeve 1 and the pulse tube 5 to prevent the heat recovery filler 7 from leaking out.

[0025] It should be noted that there are many ways to simultaneously keep the axes of the sleeve 1 and the blood vessel 5 parallel and seal the gap between the sleeve 1 and the blood vessel 5. For example, a colloid can be injected between the sleeve 1 and the blood vessel 5 to fix the sleeve 1 and the blood vessel 5 and seal the gap between the sleeve 1 and the blood vessel 5. An annular connecting piece can also be provided between the sleeve 1 and the blood vessel 5, and the circumferential edge of the outer circle of the connecting piece is welded to the inner wall of the sleeve 1, and the circumferential edge of the inner circle of the connecting piece is welded to the outer wall of the blood vessel 5.

[0026] In order to improve the sealing effect, in one embodiment of the present invention, the cross-sectional dimension of the pressure ring 3 in the direction perpendicular to the axial direction of the sleeve 1 is the same as the dimension of the bottom opening of the regenerator 6, and a vent 34 is provided on the pressure ring 3. If the cross-sectional dimension of the pressure ring 3 in the direction perpendicular to the axial direction of the sleeve 1 is smaller than the dimension of the bottom opening of the regenerator 6, the pressure ring 3 may not be provided with a vent, and the gas only needs to pass through the gap between the pressure ring 3 and the outer shell of the regenerator 6.

[0027] In one implementation of this embodiment, the sleeve 1 and the sealing screen 2 are both made of stainless steel. Stainless steel has high strength and strong corrosion resistance and a longer service life.

[0028] In one embodiment of the present embodiment, the pressure ring 3 includes an inner ring 31, an outer ring 32 and a plurality of support rods 33. The outer ring 32 is sleeved outside the inner ring 31. Each support rod 33 is arranged between the inner ring 31 and the outer ring 32. One end of the support rod 33 is fixedly connected to the outer ring 32, and the other end is fixedly connected to the inner ring 31. The inner circumferential edge of the inner ring 31 is used to be fixedly connected to the sleeve 1. There is a gap between two adjacent support rods 33 to form a vent 34. The plurality of support rods 33 arranged at intervals can form a plurality of vents 34 for gas to pass through while supporting and connecting the inner ring 31 and the outer ring 32.

[0029] In order to improve the stability of the pressure ring 3 , in one implementation of this embodiment, the support rods 33 are sequentially arranged at equal intervals along the circumference of the inner ring 31 .

[0030] In one implementation of this embodiment, the sleeve 1 and the pressure ring 3 are both used to be coaxially arranged with the blood vessel 5 .

[0031] Embodiment 2 First, the structure of the air outlet of the heat exchanger needs to be explained. The air outlet of the heat exchanger is a plate-like structure, which is provided with holes for inserting the sleeve 1 and the pulse tube 5, and a plurality of slits for gas to pass through are provided around the holes.

[0032] This embodiment provides a cold finger structure, such as Figure 1As shown, it includes: a pulse tube 5, a regenerator 6 and the heat recovery filler sealing device in Example 1, the pulse tube 5 is fixedly connected in the regenerator 6 and one end extends out from the bottom of the regenerator 6, an annular opening is formed between the bottom of the outer shell of the regenerator 6 and the pulse tube 5, the sleeve 1 is sleeved outside the pulse tube 5, the sealing screen 2 covers the opening at the bottom of the outer shell of the regenerator 6, the heat recovery filler 7 is filled between the pulse tube 5 and the outer shell of the regenerator 6, the sleeve 1 and the pulse tube 5 are used to be inserted into the hole at the outlet end of the heat exchanger, and the pressure ring 3 presses the sealing screen 2 on the outlet end of the heat exchanger.

[0033] The cold finger structure provided in this embodiment adopts the heat recovery filler sealing device in the first embodiment, so that the heat recovery filler in the heat regenerator is not easy to leak and the sealing effect is better.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A heat recovery packing sealing device, characterized in that: include: A sealing wire mesh, a sleeve and a pressure ring, wherein the sleeve is used to be sleeved outside the pulse tube, the axis of the sleeve can be kept parallel to the axis of the pulse tube, one end of the sleeve is used to extend into the shell of the heat exchanger, the pressure ring is sleeved and fixedly connected to the outside of the sleeve, the mesh size of the sealing wire mesh is smaller than the particle size of the heat recovery filler, the sealing wire mesh is sleeved outside the sleeve and located in the heat exchanger, the downward side of the sealing wire mesh is flush with the end surface of the bottom end of the heat exchanger, the cross-sectional size of the sealing wire mesh in a direction perpendicular to the axial direction of the pulse tube is the same as the size of the bottom opening of the heat exchanger, the sealing wire mesh can cover the annular opening at the bottom of the heat exchanger, the downward side of the pressure ring can press the sealing wire mesh tightly against the air outlet end of the heat exchanger, and the gas in the heat exchanger can pass through the plane where the sealing wire mesh and the pressure ring are located in sequence and enter the heat exchanger.

2. The heat recovery packing sealing device according to claim 1, characterized in that: One end of the sleeve away from the regenerator is flush with the bottom end of the pulse tube or farther away from the regenerator than the bottom end of the pulse tube.

3. The heat recovery packing sealing device according to claim 2, characterized in that: One end of the sleeve away from the heat regenerator is flush with the bottom end of the pulse tube, and one end of the sleeve away from the heat regenerator is provided with a connecting structure, and the connecting structure is used to connect the guide wire mesh.

4. The heat recovery packing sealing device according to claim 1, characterized in that: The inner wall of the sleeve is tightly fitted with the outer wall of the blood vessel.

5. The heat recovery packing sealing device according to claim 1, characterized in that: The cross-sectional dimension of the pressure ring in a direction perpendicular to the axial direction of the sleeve is the same as the dimension of the bottom opening of the regenerator, and a vent is provided on the pressure ring.

6. The heat recovery packing sealing device according to claim 2, characterized in that: The sleeve and the sealing wire mesh are both made of stainless steel.

7. The heat recovery packing sealing device according to claim 5, characterized in that: The pressure ring includes an inner ring, an outer ring and a plurality of support rods. The outer ring is sleeved outside the inner ring. Each of the support rods is arranged between the inner ring and the outer ring. One end of the support rod is fixedly connected to the outer ring, and the other end is fixedly connected to the inner ring. The inner circumferential edge of the inner ring is used to be fixedly connected to the sleeve. There is a gap between two adjacent support rods to form the vent.

8. The heat recovery packing sealing device according to claim 7, characterized in that: The support rods are arranged in sequence at equal intervals along the circumference of the inner ring.

9. The heat recovery packing sealing device according to claim 2, characterized in that: The sleeve and the pressure ring are both used for being coaxially arranged with the vessel.

10. A cold finger structure, characterized in that: include: A pulse tube, a regenerator and a heat recovery filler sealing device as described in any one of claims 1 to 9, wherein the pulse tube is fixedly connected in the regenerator and one end extends out from the bottom of the regenerator, an annular opening is formed between the bottom of the regenerator shell and the pulse tube, the sleeve is sleeved outside the pulse tube, the sealing mesh covers the opening at the bottom of the regenerator shell, heat recovery filler is filled between the pulse tube and the shell of the regenerator, the sleeve and the pulse tube are used to be inserted into the hole at the air outlet end of the heat exchanger, and the pressure ring presses the sealing mesh onto the air outlet end of the heat exchanger.

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