Auxiliary filling tool for cold storage material of piston of GM refrigerating machine

Abstract

The utility model discloses an auxiliary filling tool for cold accumulation materials of a piston of a GM refrigerator. The auxiliary filling tool comprises an auxiliary filling device and a piston cover jacking device. The auxiliary filling device comprises a supporting frame and a lower push rod, the supporting frame is provided with a base, a piston barrel loading position is arranged on the upper end face of the base, the lower push rod corresponds to the piston barrel loading position, the lower push rod penetrates through the base in the vertical direction, and the position of the lower push rod relative to the base can be adjusted in the vertical direction. The piston cover jacking device comprises a top seat and an upper push rod, the top seat is detachably connected to the supporting frame and vertically opposite to the base in a spaced mode, the upper push rod penetrates through the top seat in the vertical direction, the position of the upper push rod relative to the top seat can be adjusted in the vertical direction, and the upper push rod and the lower push rod are vertically opposite. By using the auxiliary filling tool, the filling time of the cold storage material can be shortened, and the production efficiency is improved, so that the cold storage material is effectively prevented from being in excessive contact with the outside.

Description

Technical Field

[0001] The utility model relates to a production tool for a refrigerating machine, in particular to an auxiliary filling tool for a piston cold storage material of a GM refrigerating machine. Background Art

[0002] The GM refrigerating machine is a small refrigerating machine with a wide range of uses, mainly applied to cutting-edge fields such as semiconductor integrated circuits, flat panel displays, vacuum coating, space environment simulation, high-energy physics, and cryogenic superconductivity, etc. The GM refrigerating machine is composed of an expander (cold head), a gas generator (helium compressor unit), and connecting pipes. The key component is the cold head, which is composed of a valve group gas distribution system, a thin-walled cylinder, a cryogenic regenerator, an ejector, a cold-end heat exchanger, and a hot-end heat exchanger. Among them, the cryogenic regenerator is composed of a piston tube and a cold storage filler. The piston of the cryogenic regenerator is generally processed from a phenolic resin fine cloth rod. The primary piston filler is generally phosphor bronze mesh with about 160 meshes, and the secondary piston filler is materials such as lead shots, HoCu2, ErNi, Er3Ni, etc. Among them, the number of phosphor bronze meshes to be filled in the primary piston is generally more than 600 pieces. When filling, the phosphor bronze mesh with a thickness of 0.06 mm needs to be placed into the piston cylinder with an inner diameter ranging from 35 mm to 100 mm one by one, which is time-consuming and laborious. Moreover, the phosphor bronze mesh is exposed to the external air for a long time, and a large amount of impurities and water vapor will be adsorbed, resulting in the pollution of the cold storage material, which increases the difficulty of later baking degassing and helium filling of the cold head. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an auxiliary filling tool for a piston cold storage material of a GM refrigerating machine, which can shorten the filling time of the cold storage material, improve the production efficiency, and effectively avoid excessive contact between the cold storage material and the outside.

[0004] An auxiliary filling tool for a piston cold storage material of a GM refrigerating machine according to an embodiment of the utility model includes: an auxiliary filling device, including a support frame and a lower push rod. The support frame is provided with a base, and the upper end surface of the base is provided with a piston cylinder loading position. The lower push rod is correspondingly arranged at the piston cylinder loading position. The lower push rod penetrates through the base in the up and down direction and can adjust its position relative to the base in the up and down direction; a piston cover pressing device, including a top seat and an upper push rod. The top seat is detachably connected to the support frame and is spaced up and down relative to the base. The upper push rod penetrates through the top seat in the up and down direction and can adjust its position relative to the top seat in the up and down direction. The upper push rod and the lower push rod are arranged opposite to each other up and down.

[0005] A GM refrigerator piston regenerator material auxiliary filling tool according to an embodiment of the present invention has at least the following beneficial effects: For the above-mentioned auxiliary filling tool, when filling the regenerator material, first remove the piston cover pressing device, and through the position adjustment of the lower push rod, assist in the operation of layer-by-layer filling of the regenerator material. After the regenerator material is filled, reinstall the piston cover pressing device, press the piston cover into the piston cylinder through the upper push rod, and at the same time, the whole auxiliary filling tool can be used as a fixture to fix the piston, which is convenient for subsequent further operations. By using the above-mentioned auxiliary filling tool to assist in production, the labor intensity of workers can be reduced, and at the same time, the filling speed can be increased, improving production efficiency, so as to avoid the regenerator material being exposed for too long.

[0006] According to some embodiments of the present invention, the base is provided with a positioning structure for positioning the piston cylinder.

[0007] According to some embodiments of the present invention, the positioning structure is a convex column.

[0008] According to some embodiments of the present invention, the base is provided with a first threaded hole, and the lower push rod is threadedly connected to the first threaded hole; the top seat is provided with a second threaded hole, and the upper push rod is threadedly connected to the second threaded hole.

[0009] According to some embodiments of the present invention, the lower push rod is provided with a first handle portion, and the first handle portion is arranged on the lower side of the base; the upper push rod is provided with a second handle portion, and the second handle portion is arranged on the upper side of the top seat.

[0010] According to some embodiments of the present invention, one end of the upper push rod close to the base is provided with a pressing head, and the pressing head is arranged on the lower side of the top seat.

[0011] According to some embodiments of the present invention, a relief groove for the pressing head to enter is formed on the end face of the top seat close to the pressing head.

[0012] According to some embodiments of the present invention, the support frame includes the base, a left support and a right support. The lower end of the left support is fixed to the left end of the base, the lower end of the right support is fixed to the right end of the base, the left end of the top seat is detachably connected to the upper end of the left support, and the right end of the top seat is detachably connected to the upper end of the right support.

[0013] According to some embodiments of the present utility model, the top seat includes a main body portion, a left connecting arm, and a right connecting arm. The upper push rod passes through the main body portion. The left connecting arm is connected to the left end of the main body portion and extends leftward, and the right connecting arm is connected to the right end of the main body portion and extends rightward. The left connecting arm is detachably connected to the upper end of the left bracket, and the right connecting arm is detachably connected to the upper end of the right bracket.

[0014] According to some embodiments of the present utility model, a left stud is provided at the upper end of the left bracket, a left through hole is provided at the left end of the top seat, the left stud passes through the left through hole, and a left nut is threadedly connected to the left stud. The left nut is used to press and fix the left end of the top seat to the left bracket. A right stud is provided at the upper end of the right bracket, a right through hole is provided at the right end of the top seat, the right stud passes through the right through hole, and a right nut is threadedly connected to the right stud. The right nut is used to press and fix the right end of the top seat to the right bracket.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a perspective schematic view when pressing the piston cover in an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 an exploded schematic view of the structure shown;

[0019] Figure 3 is a schematic structural view when filling the cold storage material through the auxiliary filling device in an embodiment of the present utility model;

[0020] Figure 4 is a perspective schematic view of the piston cover pressing device in an embodiment of the present utility model.

[0021] REFERENCE SIGNS:

[0022] piston cylinder 1, piston cover 2;

[0023] auxiliary filling device 100, support frame 110, lower push rod 120, base 111, positioning structure 1111, first threaded hole 1112, first handle portion 121, left bracket 112, right bracket 113, left stud 1121, right stud 1131, left nut 114, right nut 115;

[0024] Piston head pressing device 200, top seat 210, upper push rod 220, second threaded hole 211, pressing head 221, relief groove 212, main body portion 213, left connecting arm 214, right connecting arm 215, left perforation 216, right perforation 217. Detailed implementation manners

[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If the first and the second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence of the indicated technical features.

[0028] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0029] Refer to Figures 1 to 4, a GM refrigerator piston regenerator material auxiliary filling tool, which comprises an auxiliary filling device 100 and a piston cover pressing device 200. The auxiliary filling device 100 includes a support frame 110 and a lower push rod 120. The support frame 110 is provided with a base 111, and the upper end surface of the base 111 is provided with a piston cylinder loading position. The lower push rod 120 is arranged corresponding to the piston cylinder loading position. The lower push rod 120 passes through the base 111 in the up and down direction and can adjust its position relative to the base 111 in the up and down direction. The piston cover pressing device 200 includes a top seat 210 and an upper push rod 220. The top seat 210 is detachably connected to the support frame 110 and is spaced up and down relative to the base 111. The upper push rod 220 passes through the top seat 210 in the up and down direction and can adjust its position relative to the top seat 210 in the up and down direction. The upper push rod 220 and the lower push rod 120 are arranged opposite to each other up and down.

[0030] When filling the regenerator material, first remove the top seat 210 from the support frame 110, so as to disassemble the entire piston cover pressing device 200. Place the piston cylinder 1 at the piston cylinder loading position of the base 111, so that the lower push rod 120 passes through the piston cylinder 1 through the perforation on the lower bottom wall of the piston cylinder 1. Adjust the position of the lower push rod 120 so that its upper end surface is slightly lower than the upper end port of the piston cylinder 1. Then place a phosphor bronze punching plate about 0.1 mm thick on the upper end of the piston cylinder 1 as the bottom support, and then gradually put in the phosphor bronze mesh. After putting in several phosphor bronze meshes, the position of the lower push rod 120 can be adjusted to make it move down a certain height, so that the position of the uppermost phosphor bronze mesh is slightly lower than the upper end surface of the piston cylinder 1, which is convenient for subsequent filling. After filling the regenerator material, reinstall the top seat 210 to the support frame 110. Coat the periphery of the piston cover 2 with low-temperature glue, so that it presses between the upper side of the phosphor bronze mesh and the lower end of the upper push rod 220. By adjusting the position of the upper push rod 220 downward, the piston cover 2 is pressed into the piston cylinder 1 and the phosphor bronze mesh is compacted. During the pressing process, pay attention to aligning the mounting holes of the piston cover 2 with the connection holes of the piston cylinder 1 to facilitate subsequent fixation. Then send the entire auxiliary filling tool and the piston into the oven and bake at a temperature of 100 °C to 120 °C for 2 h to 3 h. After the low-temperature glue is completely solidified, take out the auxiliary filling tool. After cooling, remove the filled piston, and then put the piston into a vacuum bag or a vacuum chamber for storage.

[0031] For the above auxiliary filling tool, when filling the cold storage material, first remove the piston cover pressing device 200, and through the position adjustment of the lower push rod 120, assist in the operation of layer-by-layer filling of the cold storage material. After the cold storage material is filled, reinstall the piston cover pressing device 200, press the piston cover 2 into the piston cylinder 1 through the upper push rod 220, and at the same time, the whole auxiliary filling tool can be used as a fixture to fix the piston, facilitating subsequent further operations. By using the above auxiliary filling tool to assist in production, the labor intensity of workers can be reduced, and at the same time, the filling speed can be increased, improving production efficiency, thereby avoiding the cold storage material being exposed for too long.

[0032] In the embodiment, the base 111 is provided with a positioning structure 1111 for positioning the piston cylinder 1, so that the piston cylinder 1 can be stably positioned and placed, facilitating subsequent filling operations.

[0033] In the embodiment, the positioning structure 1111 is a convex column, and the convex column can be inserted into the groove on the lower end face of the piston cylinder 1 for positioning. It can be imagined that in some embodiments, the positioning structure 1111 is not limited to using a convex column, for example, it can also be a groove structure adapted to the lower end of the piston cylinder 1.

[0034] In the embodiment, the base 111 is provided with a first threaded hole 1112, and the lower push rod 120 is threadedly connected to the first threaded hole 1112; the top seat 210 is provided with a second threaded hole 211, and the upper push rod 220 is threadedly connected to the second threaded hole 211. By adopting the above structure, the position of the lower push rod 120 and the upper push rod 220 can be adjusted by rotation, which is convenient for operation; the threaded structure can achieve a steady push, facilitating the combination of the piston cover 2 and the piston cylinder 1.

[0035] It can be imagined that in some embodiments, the lower push rod 120 and the upper push rod 220 are not limited to the above structure for position adjustment. For example, the lower push rod 120 and the upper push rod 220 are respectively slidably arranged on the base 111 and the top seat 210, and the base 111 and the top seat 210 are respectively provided with a clamp or a positioning screw, and the lower push rod 120 and the upper push rod 220 are positioned or released through the clamp or the positioning screw, thereby realizing the corresponding position adjustment function.

[0036] In the embodiment, the lower push rod 120 is provided with a first handle portion 121, and the first handle portion 121 is arranged on the lower side of the base 111; the upper push rod 220 is provided with a second handle portion, and the second handle portion is arranged on the upper side of the top seat 210. Through the setting of the above handle portions, the operation of the corresponding push rod can be facilitated.

[0037] In the embodiment, the end of the upper push rod 220 close to the base 111 is provided with a pressing head 221, and the pressing head 221 is arranged on the lower side of the top seat 210. The pressing head 221 can be used to cooperate with the piston cover 2, and the matching degree is better.

[0038] In an embodiment, a relief groove 212 into which the pressure head 221 can enter is formed in the end face of the top seat 210 close to the pressure head 221. With the above structure, the pushing distance of the upper push rod 220 can be increased.

[0039] In an embodiment, the support frame 110 includes a base 111, a left support 112, and a right support 113. The lower end of the left support 112 is fixed to the left end of the base 111, and the lower end of the right support 113 is fixed to the right end of the base 111. The left end of the top seat 210 is detachably connected to the upper end of the left support 112, and the right end of the top seat 210 is detachably connected to the upper end of the right support 113. With the above structure, the support for the top seat 210 is stable, the structure of the support frame 110 is simple, easy to implement, and convenient for taking and placing the piston cylinder 1.

[0040] In an embodiment, the lower ends of the left support 112 and the right support 113 can be welded and fixed to the left end and the right end of the base 111. A left insertion groove is provided at the left end of the base 111, and a right insertion groove is provided at the right end of the base 111. The left support 112 and the right support 113 are L-shaped. The lower end of the left support 112 is inserted into the left insertion groove, and the lower end of the right support 113 is inserted into the right insertion groove, thereby facilitating the positioning and fixing of the left support 112 and the right support 113. It can be imagined that the connection between the left support 112 and the right support 113 and the base 111 is not limited to the above structure. For example, they can also be connected by threaded fasteners, or in some embodiments, an integrally formed structure is adopted.

[0041] In an embodiment, the top seat 210 includes a main body portion 213, a left connecting arm 214, and a right connecting arm 215. The upper push rod 220 passes through the main body portion 213. The left connecting arm 214 is connected to the left end of the main body portion 213 and extends leftward, and the right connecting arm 215 is connected to the right end of the main body portion 213 and extends rightward. The left connecting arm 214 is detachably connected to the upper end of the left support 112, and the right connecting arm 215 is detachably connected to the upper end of the right support 113. The above structure of the top seat 210 is simple and easy to implement.

[0042] In an embodiment, the left connecting arm 214 and the right connecting arm 215 can be fixedly welded to the left and right ends of the main body portion 213. In an embodiment, a left mounting groove and a right mounting groove can be respectively formed at the left end and the right end of the main body portion 213. The left connecting arm 214 is mounted in the left mounting groove, and the right connecting arm 215 is mounted in the right mounting groove, so as to facilitate positioning and fixing and subsequent welding. Of course, it can be imagined that the connection between the main body portion 213, the left connecting arm 214 and the right connecting arm 215 is not limited to welding. For example, they can be connected by threaded fasteners. In some embodiments, the main body portion 213, the left connecting arm 214 and the right connecting arm 215 can also adopt an integrally formed structure, which can be specifically configured according to the actual situation.

[0043] In an embodiment, a left stud 1121 is provided at the upper end of the left bracket 112, a left through hole 216 is provided at the left end of the top seat 210, the left stud 1121 penetrates into the left through hole 216, and a left nut 114 is threadedly connected to the left stud 1121. The left nut 114 is used to press and fix the left end of the top seat 210 to the left bracket 112; a right stud 1131 is provided at the upper end of the right bracket 113, a right through hole 217 is provided at the right end of the top seat 210, the right stud 1131 penetrates into the right through hole 217, and a right nut 115 is threadedly connected to the right stud 1131. The right nut 115 is used to press and fix the right end of the top seat 210 to the right bracket 113. In an embodiment, the left through hole 216 is specifically provided on the left connecting arm 214, and the right through hole 217 is specifically provided on the right connecting arm 215.

[0044] When it is necessary to disassemble the top seat 210, the left nut 114 and the right nut 115 can be disassembled from the left stud 1121 and the right stud 1131, and then the top seat 210 can be directly pulled out. With the above structure, the assembly and disassembly structure is simple, and the structure is stable during connection. It can be imagined that in some embodiments, the detachable top seat 210 is not limited to the above structure. For example, it can be realized by a snap connection structure or a pin fixing structure. It can be understood that in this field, there are many implementation ways to achieve detachable connection between components, and those skilled in the art can configure according to the actual situation.

[0045] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0046] The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the above embodiments. Those skilled in the art can make various changes without departing from the purpose of the present invention within the scope of knowledge they possess.

Claims

1. An auxiliary filling tool for the piston regenerator material of a GM refrigerator, characterized in that include: The auxiliary filling device (100) comprises a support frame (110) and a lower push rod (120), wherein the support frame (110) is provided with a base (111), the upper end surface of the base (111) is provided with a piston cylinder loading position, the lower push rod (120) is provided corresponding to the piston cylinder loading position, and the lower push rod (120) is passed through the base (111) in the up-down direction and can adjust its position relative to the base (111) in the up-down direction; The piston cover pressing device (200) comprises a top seat (210) and an upper push rod (220), wherein the top seat (210) is detachably connected to the support frame (110) and is spaced apart from the base (111) in an upper and lower direction, and the upper push rod (220) is passed through the top seat (210) in an upper and lower direction and can adjust its position relative to the top seat (210) in an upper and lower direction, and the upper push rod (220) is arranged in an upper and lower direction opposite to the lower push rod (120).

2. The GM refrigerator piston regenerator material auxiliary filling tool according to claim 1, characterized in that: The base (111) is provided with a positioning structure (1111) for positioning the piston cylinder (1).

3. The GM refrigerator piston cold storage material auxiliary filling tool according to claim 2, characterized in that: The positioning structure (1111) is a convex column.

4. The GM refrigerator piston cold storage material auxiliary filling tool according to claim 1, characterized in that: The base (111) is provided with a first threaded hole (1112), and the lower push rod (120) is threadedly connected to the first threaded hole (1112); the top seat (210) is provided with a second threaded hole (211), and the upper push rod (220) is threadedly connected to the second threaded hole (211).

5. The GM refrigerator piston regenerator material auxiliary filling tool according to claim 4, characterized in that: The lower push rod (120) is provided with a first handle portion (121), and the first handle portion (121) is arranged on the lower side of the base (111); the upper push rod (220) is provided with a second handle portion, and the second handle portion is arranged on the upper side of the top seat (210).

6. The GM refrigerator piston cold storage material auxiliary filling tool according to claim 1, characterized in that: A pressure head (221) is provided at one end of the upper push rod (220) close to the base (111), and the pressure head (221) is arranged on the lower side of the top seat (210).

7. The GM refrigerator piston regenerator material auxiliary filling tool according to claim 6, characterized in that: The end surface of the top seat (210) close to the pressing head (221) is provided with a clearance groove (212) capable of allowing the pressing head (221) to enter.

8. The GM refrigerator piston regenerator material auxiliary filling tool according to claim 1, characterized in that: The support frame (110) comprises the base (111), a left bracket (112) and a right bracket (113); the lower end of the left bracket (112) is fixed to the left end of the base (111); the lower end of the right bracket (113) is fixed to the right end of the base (111); the left end of the top seat (210) and the upper end of the left bracket (112) are detachably connected; and the right end of the top seat (210) and the upper end of the right bracket (113) are detachably connected.

9. The auxiliary filling tool for the piston cold storage material of the GM refrigerator according to claim 8, wherein: The top seat (210) includes a main body portion (213), a left connecting arm (214), and a right connecting arm (215). The upper push rod (220) passes through the main body portion (213). The left connecting arm (214) is connected to the left end of the main body portion (213) and extends leftward. The right connecting arm (215) is connected to the right end of the main body portion (213) and extends rightward. The left connecting arm (214) is detachably connected to the upper end of the left bracket (112), and the right connecting arm (215) is detachably connected to the upper end of the right bracket (113).

10. The GM refrigerator piston regenerator material auxiliary filling tool according to claim 8, characterized in that: The upper end of the left bracket (112) is provided with a left stud (1121). The left end of the top seat (210) is provided with a left through hole (216). The left stud (1121) penetrates into the left through hole (216). The left stud (1121) is threadedly connected with a left nut (114). The left nut (114) is used to press and fix the left end of the top seat (210) to the left bracket (112). The upper end of the right bracket (113) is provided with a right stud (1131). The right end of the top seat (210) is provided with a right through hole (217). The right stud (1131) penetrates into the right through hole (217). The right stud (1131) is threadedly connected with a right nut (115). The right nut (115) is used to press and fix the right end of the top seat (210) to the right bracket (113).

Images