CN112276476A - Liquid nitrogen cooling treatment equipment for engine cylinder sleeve - Google Patents
Liquid nitrogen cooling treatment equipment for engine cylinder sleeve Download PDFInfo
- Publication number
- CN112276476A CN112276476A CN202011237067.9A CN202011237067A CN112276476A CN 112276476 A CN112276476 A CN 112276476A CN 202011237067 A CN202011237067 A CN 202011237067A CN 112276476 A CN112276476 A CN 112276476A
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- liquid nitrogen
- sliding
- barrel
- frame
- cooling treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to treatment equipment, in particular to liquid nitrogen cooling treatment equipment for an engine cylinder sleeve. The invention provides a liquid nitrogen cooling treatment device for an engine cylinder sleeve, which can automatically put in and take out the cylinder sleeve and can prevent hands from being frostbitten. An engine cylinder liner liquid nitrogen cooling treatment device comprises: a base, on which a liquid nitrogen barrel is connected; the driving mechanism is arranged between the base and the liquid nitrogen barrel; the lifting platform is arranged on the liquid nitrogen barrel and is in transmission connection with the driving mechanism. The lifting platform can be driven to work through the driving mechanism, the cylinder sleeve can move downwards to enter liquid nitrogen in the liquid nitrogen barrel to be cooled through the working of the lifting platform, and the cooled cylinder sleeve can move upwards to move out of the liquid nitrogen in the liquid nitrogen barrel, so that the purposes of automatically putting in and taking out the cylinder sleeve and preventing hands from being frostbitten are achieved.
Description
Technical Field
The invention relates to treatment equipment, in particular to liquid nitrogen cooling treatment equipment for an engine cylinder sleeve.
Background
The cylinder liner needs to carry out liquid nitrogen cooling earlier and handles, utilizes expend with heat and contract with cold's principle, makes the cylinder liner reduce, in can putting into the engine with the cylinder liner, carry out liquid nitrogen cooling to the cylinder liner at present and handle generally artifical manual going on, carry out liquid nitrogen cooling treatment during operation, artifical manual carries out cooling treatment with the help of the instrument in putting into the liquid nitrogen with the cylinder liner, handle the completion back, again manually take out the cylinder liner from the liquid nitrogen with the help of the instrument, this mode security is low, careless hand is easily frostbitten.
Therefore, it is necessary to develop a liquid nitrogen cooling treatment device for an engine cylinder liner, which can automatically insert and remove the cylinder liner and can prevent hands from being frostbitten.
Disclosure of Invention
(1) Technical problem to be solved
The invention aims to overcome the defect that hands are easily frosted due to the fact that a cylinder sleeve needs to be manually placed into liquid nitrogen and taken out of the liquid nitrogen, and the technical problem to be solved is to provide the liquid nitrogen cooling treatment equipment for the engine cylinder sleeve, which can automatically place and take the cylinder sleeve and can prevent the hands from being frosted.
(2) Technical scheme
In order to solve the technical problem, the invention provides a liquid nitrogen cooling treatment device for an engine cylinder sleeve, which comprises: a base, on which a liquid nitrogen barrel is connected; the driving mechanism is arranged between the base and the liquid nitrogen barrel; the lifting platform is arranged on the liquid nitrogen barrel and is in transmission connection with the driving mechanism.
Preferably, the drive mechanism comprises: the cylinder is arranged on one side, close to the liquid nitrogen barrel, of the base; the outer wall of one side of the liquid nitrogen barrel is connected with the first guide rail frame; the first guide rail frame is internally connected with a sliding rack in a sliding way; the connecting plate is connected with the sliding rack and is connected with the telescopic rod of the air cylinder.
Preferably, the elevating platform comprises: the two sides in the liquid nitrogen barrel are both connected with the second guide rail frame; the sliding ring frames are connected between the second guide rail frames in a sliding manner; the inner wall of the sliding ring frame is connected with a supporting plate; a fixed rack is connected to the outer wall of one side of the sliding ring frame; the liquid nitrogen barrel is connected with a first guide rail frame, and the liquid nitrogen barrel is connected with a second guide rail frame.
Preferably, the clamping mechanism is further included, and the clamping mechanism includes: the two sides of the end part of the sliding ring frame are connected with the mounting seats; the mounting base is rotatably connected with the rocking plate; the scroll spring is connected between the rocking plate and the mounting seat; the clamping block is connected with the rocking plate in a sliding manner; the first supporting spring is connected between the clamping block and the rocking plate; the two sides of the inner wall of the sliding ring frame are connected with the third guide rail frame; the sliding bottom plate is connected between the third guide rail frames in a sliding manner; and the second supporting spring is connected between the sliding bottom plate and the supporting plate, the two sides of the sliding bottom plate are both connected with push blocks, and the push blocks are in contact fit with the rocking plate.
Preferably, still include arm lock chucking mechanism, arm lock chucking mechanism includes: the other two sides of the end part of the sliding ring frame are connected with the fixed frame; the fixing frame is connected with the sliding wedge block frame in a sliding manner; the reset spring is connected between the sliding wedge block frame and the fixed frame; the other two sides of the sliding bottom plate are both connected with clamping blocks, and the clamping blocks are matched with the sliding wedge block frame.
Preferably, the mobile cover structure further comprises: the upper part of the other side of the liquid nitrogen barrel is connected with the connecting seat; the barrel cover is rotatably connected to the connecting seat; and one side of the liquid nitrogen barrel, which is close to the connecting seat, is connected with a bracket, and the bracket is in contact fit with the barrel cover.
Preferably, the device further comprises a switch cover mechanism, wherein the switch cover mechanism comprises: the barrel cover is connected with a second gear; and one side of the end part of the sliding ring frame, which is close to the second gear, is connected with a rack rod, and the rack rod is matched with the second gear.
(3) Advantageous effects
1. Can drive lift platform through actuating mechanism and carry out work, lift platform carries out work and can make the cylinder liner downstream get into the liquid nitrogen in the liquid nitrogen bucket in and cool off, can make the cylinder liner rebound after the cooling shift out from the liquid nitrogen in the liquid nitrogen bucket to realized can put into automatically and take out the cylinder liner, can prevent the purpose that the hand is frostbitten.
2. The cylinder sleeve can be clamped and fixed through the clamping mechanism, so that the cylinder sleeve can be prevented from shaking when moving up and down.
3. The clamping mechanism can better clamp and fix the cylinder sleeve through the clamping arm, the movable cover structure can be automatically covered and opened through the cover opening and closing mechanism, and the liquid nitrogen barrel can be sealed through the movable cover structure, so that liquid nitrogen can be prevented from volatilizing rapidly.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of the present invention.
Fig. 2 is a schematic perspective view of a second embodiment of the present invention.
Fig. 3 is a third perspective view of the present invention.
Fig. 4 is an enlarged view of a portion a of the present invention.
The labels in the figures are: 1-base, 2-liquid nitrogen barrel, 3-driving mechanism, 31-air cylinder, 32-first guide rail bracket, 33-connecting plate, 34-sliding rack, 4-lifting platform, 41-second guide rail bracket, 42-sliding ring bracket, 43-supporting plate, 44-fixed rack, 45-first gear, 5-clamping mechanism, 51-mounting seat, 52-volute spring, 53-rocking plate, 54-clamping block, 55-first supporting spring, 56-second supporting spring, 57-sliding bottom plate, 58-third guide rail bracket, 6-clamping arm clamping mechanism, 61-fixing frame, 62-sliding wedge block bracket, 63-reset spring, 64-clamping block, 7-movable cover structure, 71-connecting seat, 72-barrel cover, 73-bracket, 8-cover opening and closing mechanism, 81-second gear, 82-rack bar and 9-cylinder sleeve.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1
A liquid nitrogen cooling treatment device for an engine cylinder sleeve is shown in a figure 1-2 and comprises a base 1, a liquid nitrogen barrel 2, a driving mechanism 3 and a lifting platform 4, wherein the top of the base 1 is connected with the liquid nitrogen barrel 2, the driving mechanism 3 is arranged between the base 1 and the liquid nitrogen barrel 2, the lifting platform 4 is arranged on the liquid nitrogen barrel 2, and the lifting platform 4 is in transmission connection with the driving mechanism 3.
The driving mechanism 3 comprises a cylinder 31, a first guide rail frame 32, a connecting plate 33 and a sliding rack 34, the cylinder 31 is installed on the right side of the top of the base 1, the first guide rail frame 32 is connected to the outer wall of the right side of the liquid nitrogen barrel 2, the sliding rack 34 is connected to the first guide rail frame 32 in a sliding mode, the connecting plate 33 is connected to the sliding rack 34, and the connecting plate 33 is connected with an expansion rod of the cylinder 31.
Lifting platform 4 is including second guide rail frame 41, slip ring frame 42, layer board 43, fixed rack 44 and first gear 45, both sides all are connected with second guide rail frame 41 around in the liquid nitrogen bucket 2, sliding connection has slip ring frame 42 between two second guide rail frames 41, sliding connection has layer board 43 in the ring frame 42 inner wall, sliding connection has fixed rack 44 on the outer wall of ring frame 42 right side, liquid nitrogen bucket 2 right side upper portion rotary type is connected with first gear 45, first gear 45 meshes with fixed rack 44 and slip rack 34 respectively.
When the cylinder sleeve 9 is to be cooled by liquid nitrogen, the equipment can be used, firstly, liquid nitrogen is poured into a liquid nitrogen barrel 2, then, the cylinder sleeve 9 is placed on a supporting plate 43, then, an air cylinder 31 is started to enable a connecting plate 33 to move upwards, the connecting plate 33 moves upwards to push a sliding rack 34 to move upwards, the sliding rack 34 moves upwards to enable a fixed rack 44 to move downwards through a first gear 45, the fixed rack 44 moves downwards to enable a sliding ring frame 42 to move downwards, the sliding ring frame 42 moves downwards to enable the supporting plate 43 to move downwards, the supporting plate 43 moves downwards to enable a cylinder sleeve 9 on the supporting plate to move downwards to enter liquid nitrogen in the liquid nitrogen barrel 2, after the cylinder sleeve 9 completely enters the liquid nitrogen, the air cylinder 31 is closed, the cylinder sleeve 9 can be cooled by the liquid nitrogen, after the cooling treatment of the cylinder sleeve 9 is completed, the air cylinder 31 is started to enable the connecting plate 33 to move downwards to reset, so that the, therefore, the cylinder sleeve 9 can be taken out of the liquid nitrogen in the liquid nitrogen barrel 2, after the cylinder sleeve 9 moves upwards and is reset, the air cylinder 31 is closed, then the cylinder sleeve 9 is taken down, another cylinder sleeve 9 is placed again, the operation is repeated, and the cooling work of the cylinder sleeve 9 can be repeated. Therefore, the lifting platform 4 can be driven to work through the driving mechanism 3, the lifting platform 4 can work to enable the cylinder sleeve 9 to move downwards to enter liquid nitrogen in the liquid nitrogen barrel 2 to be cooled, the cooled cylinder sleeve 9 can move upwards to move out of the liquid nitrogen in the liquid nitrogen barrel 2, and therefore the purposes that the cylinder sleeve 9 can be automatically put in and taken out and hands can be prevented from being frostbitten are achieved.
Example 2
On the basis of embodiment 1, as shown in fig. 4, the clamping device 5 further comprises a clamping mechanism 5, the clamping mechanism 5 comprises an installation base 51, a volute spring 52, a rocking plate 53, a clamping block 54, a first supporting spring 55, a second supporting spring 56, a sliding bottom plate 57 and a third guide rail bracket 58, the installation base 51 is connected to the right front side and the left rear side of the top of the sliding ring bracket 42, the rocking plate 53 is rotatably connected to the installation base 51, the volute spring 52 is connected between the rocking plate 53 and the installation base 51, the clamping block 54 is slidably connected to the upper portion of the rocking plate 53, the first supporting spring 55 is connected between the clamping block 54 and the rocking plate 53, the third guide rail bracket 58 is connected to the front and rear sides of the inner wall of the sliding ring bracket 42, the sliding bottom plate 57 is slidably connected between the two third guide rail brackets 58, the second supporting spring 56 is connected between the sliding bottom plate 57 and the supporting plate 43, the pushing blocks are connected to the right front side and, the push block is in contact engagement with the rocker plate 53.
The cylinder sleeve 9 can be placed on the sliding bottom plate 57, the sliding bottom plate 57 can move downwards under the action of gravity, the second supporting spring 56 is compressed along with the sliding bottom plate 57, the sliding bottom plate 57 moves downwards to drive the push block on the sliding bottom plate to move downwards, the push block moves downwards to enable the upper portion of the rocking plate 53 to swing inwards, the volute spiral spring 52 is compressed along with the sliding bottom plate, the upper portion of the rocking plate 53 swings inwards to enable the clamping block 54 to swing inwards to be attached to the cylinder sleeve 9, the cylinder sleeve 9 can be clamped and fixed through the action of the first supporting spring 55 and the clamping block 54, the cylinder sleeve 9 can be prevented from swinging during up and down movement, when the cylinder sleeve 9 is to be taken down, the clamping block 54 is pulled outwards, the first supporting spring 55 is compressed along with the cylinder sleeve 55, then the cylinder sleeve 9 can be taken down and released from the clamping block 54, after the cylinder sleeve 9 is taken down, the sliding bottom plate 57 can move upwards to reset along with the second supporting spring 56, the, under the action of the spiral spring 52, the rocking plate 53 can be swung and reset, and the clamping block 54 is swung and reset outwards along with the rocking plate.
Example 3
On the basis of embodiment 2, as shown in fig. 4, the clamp arm clamping mechanism 6 is further included, the clamp arm clamping mechanism 6 includes a fixing frame 61, a sliding wedge frame 62, a return spring 63 and a clamping block 64, the left front side and the right rear side of the top of the sliding ring frame 42 are both connected with the fixing frame 61, the sliding wedge frame 62 is connected on the fixing frame 61 in a sliding manner, the return spring 63 is connected between the sliding wedge frame 62 and the fixing frame 61, the left front side and the right rear side of the sliding bottom plate 57 are both connected with the clamping block 64, and the clamping block 64 is matched with the sliding wedge frame 62.
The sliding bottom plate 57 moves down to drive the fixture block 64 to move down, the fixture block 64 moves down to enable the sliding wedge block frame 62 to move outwards, the reset spring 63 is compressed along with the fixture block 64, when the fixture block 64 moves down to the lower side of the sliding wedge block frame 62, under the action of the reset spring 63, the sliding wedge block frame 62 can move inwards to reset to press the fixture block 64 to be fixed, so that the sliding bottom plate 57 can be fixed, the sliding bottom plate 57 is prevented from moving upwards by itself, the cylinder sleeve 9 can be fixed more firmly, and the clamping block 54 is prevented from swinging to reset to loosen the cylinder sleeve 9 by itself. When the clamp block 54 is to be swung back, the sliding wedge bracket 62 is pulled outward to release the latch 64.
As shown in fig. 3, the liquid nitrogen container further comprises a movable cover structure 7, the movable cover structure 7 comprises a connecting seat 71, a container cover 72 and a bracket 73, the connecting seat 71 is connected to the upper portion of the left side of the liquid nitrogen container 2, the container cover 72 is rotatably connected to the connecting seat 71, the bracket 73 is connected to the upper portion of the left side of the liquid nitrogen container 2, the bracket 73 is located on the lower side of the connecting seat 71, and the bracket 73 is in contact fit with the container cover 72.
After in cylinder liner 9 got into the liquid nitrogen, can artifical manual cover bung 72 back, so can seal liquid nitrogen bucket 2 to can prevent that the liquid nitrogen from volatilizing fast, when making cylinder liner 9 rebound, artifical manual open bung 72 can, bracket 73 plays the supporting role, can hold bung 72.
On the basis of embodiment 3, as shown in fig. 2, the device further includes a switch cover mechanism 8, the switch cover mechanism 8 includes a second gear 81 and a rack bar 82, the second gear 81 is connected to the tub cover 72, the rack bar 82 is connected to the left side of the top of the sliding ring frame 42, and the rack bar 82 is engaged with the second gear 81.
The sliding ring frame 42 moves downwards to drive the rack rod 82 to move downwards, when the rack rod 82 moves to be meshed with the second gear 81, the rack rod 82 continues to move downwards to enable the second gear 81 to rotate, and the second gear 81 rotates to drive the barrel cover 72 to rotate to cover the liquid nitrogen barrel 2; the sliding ring frame 42 moves upwards to drive the rack rod 82 to move upwards, the rack rod 82 moves upwards to enable the barrel cover 72 to rotate reversely to be opened through the second gear 81, manual covering of the barrel cover 72 and opening of the barrel cover 72 are not needed, and therefore time and labor can be saved.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. An engine cylinder liner liquid nitrogen cooling treatment device is characterized by comprising:
the base (1) is connected with a liquid nitrogen barrel (2);
the driving mechanism (3) is arranged between the base (1) and the liquid nitrogen barrel (2);
the liquid nitrogen barrel is characterized in that the lifting platform (4) is arranged on the liquid nitrogen barrel (2), and the lifting platform (4) is in transmission connection with the driving mechanism (3).
2. The liquid nitrogen cooling treatment equipment for engine cylinder liners according to claim 1, wherein the driving mechanism (3) comprises:
the cylinder (31) is arranged on one side, close to the liquid nitrogen barrel (2), of the base (1);
the outer wall of one side of the liquid nitrogen barrel (2) is connected with the first guide rail bracket (32);
the first guide rail bracket (32) is internally and slidably connected with a sliding rack (34);
the connecting plate (33) is connected to the sliding rack (34), and the connecting plate (33) is connected with an expansion rod of the air cylinder (31).
3. The liquid nitrogen cooling treatment equipment for engine cylinder liners according to claim 2, wherein the lifting platform (4) comprises:
the two sides in the liquid nitrogen barrel (2) are connected with the second guide rail bracket (41);
the sliding ring frames (42) are connected between the second guide rail frames (41) in a sliding manner;
the inner wall of the sliding ring frame (42) is connected with the supporting plate (43);
a fixed rack (44), wherein the outer wall of one side of the sliding ring frame (42) is connected with the fixed rack (44);
the liquid nitrogen barrel (2) is rotatably connected with a first gear (45) at one side close to the first guide rail frame (32), and the first gear (45) is respectively meshed with the fixed rack (44) and the sliding rack (34).
4. The liquid nitrogen cooling treatment equipment for the engine cylinder liner according to claim 3, further comprising a clamping mechanism (5), wherein the clamping mechanism (5) comprises:
the two sides of the end part of the sliding ring frame (42) are connected with the mounting seats (51);
the rocking plate (53) is rotatably connected to the mounting seat (51);
a scroll spring (52), wherein the scroll spring (52) is connected between the rocking plate (53) and the mounting seat (51);
the clamping block (54) is connected with the rocking plate (53) in a sliding way;
the first supporting spring (55) is connected between the clamping block (54) and the rocking plate (53);
the two sides of the inner wall of the sliding ring frame (42) are connected with the third guide rail frame (58);
the sliding bottom plate (57) is connected between the third guide rail brackets (58) in a sliding way;
the second supporting spring (56) is connected between the sliding bottom plate (57) and the supporting plate (43), the two sides of the sliding bottom plate (57) are both connected with push blocks, and the push blocks are in contact fit with the rocking plate (53).
5. The liquid nitrogen cooling treatment equipment for the engine cylinder sleeve according to claim 4, further comprising a clamping arm clamping mechanism (6), wherein the clamping arm clamping mechanism (6) comprises:
the other two sides of the end part of the sliding ring frame (42) are connected with the fixed frame (61);
the fixed frame (61) is connected with the sliding wedge block frame (62) in a sliding way;
the return spring (63) is connected between the sliding wedge block frame (62) and the fixed frame (61);
the other two sides of the sliding bottom plate (57) are both connected with the clamping blocks (64), and the clamping blocks (64) are matched with the sliding wedge block frame (62).
6. The liquid nitrogen cooling treatment equipment for engine cylinder liners according to claim 5, further comprising a movable cover structure (7), wherein the movable cover structure (7) comprises:
the upper part of the other side of the liquid nitrogen barrel (2) is connected with the connecting seat (71);
the barrel cover (72) is rotatably connected to the connecting seat (71);
bracket (73), one side that is close to connecting seat (71) on liquid nitrogen bucket (2) is connected with bracket (73), and bracket (73) and bung (72) contact cooperation.
7. The liquid nitrogen cooling treatment equipment for engine cylinder liners according to claim 6, further comprising an open-close cover mechanism (8), wherein the open-close cover mechanism (8) comprises:
the second gear (81) is connected to the barrel cover (72);
and the rack rod (82) is connected to one side, close to the second gear (81), of the end part of the sliding ring frame (42), and the rack rod (82) is matched with the second gear (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237067.9A CN112276476A (en) | 2020-11-09 | 2020-11-09 | Liquid nitrogen cooling treatment equipment for engine cylinder sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237067.9A CN112276476A (en) | 2020-11-09 | 2020-11-09 | Liquid nitrogen cooling treatment equipment for engine cylinder sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112276476A true CN112276476A (en) | 2021-01-29 |
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ID=74350658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011237067.9A Pending CN112276476A (en) | 2020-11-09 | 2020-11-09 | Liquid nitrogen cooling treatment equipment for engine cylinder sleeve |
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| Country | Link |
|---|---|
| CN (1) | CN112276476A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2520755A1 (en) * | 1982-01-29 | 1983-08-05 | Denhez Jean Claude | Heat treatment unit - comprising furnace and carriage with loading unloading platform |
| CN102717227A (en) * | 2012-04-29 | 2012-10-10 | 扬州市昌盛车业有限公司 | Device for installing guide pillar and guide sleeve by liquid nitrogen refrigeration |
| CN103100881A (en) * | 2012-12-09 | 2013-05-15 | 重庆巨康建材有限公司 | Turning clamping device |
| CN105538138A (en) * | 2015-12-11 | 2016-05-04 | 荣昌县永鑫钢结构加工厂 | Novel pipe grinding and detecting device |
| CN110215936A (en) * | 2019-06-06 | 2019-09-10 | 北京卫星环境工程研究所 | Testpieces lifting and liquid nitrogen case opening and closing device in high temperature and immersing in liquid nitrogen Alternating Test |
| CN214778276U (en) * | 2021-05-19 | 2021-11-19 | 无锡伟烽精密模具有限公司 | Intelligent garbage classification device capable of automatically opening and closing cover |
-
2020
- 2020-11-09 CN CN202011237067.9A patent/CN112276476A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2520755A1 (en) * | 1982-01-29 | 1983-08-05 | Denhez Jean Claude | Heat treatment unit - comprising furnace and carriage with loading unloading platform |
| CN102717227A (en) * | 2012-04-29 | 2012-10-10 | 扬州市昌盛车业有限公司 | Device for installing guide pillar and guide sleeve by liquid nitrogen refrigeration |
| CN103100881A (en) * | 2012-12-09 | 2013-05-15 | 重庆巨康建材有限公司 | Turning clamping device |
| CN105538138A (en) * | 2015-12-11 | 2016-05-04 | 荣昌县永鑫钢结构加工厂 | Novel pipe grinding and detecting device |
| CN110215936A (en) * | 2019-06-06 | 2019-09-10 | 北京卫星环境工程研究所 | Testpieces lifting and liquid nitrogen case opening and closing device in high temperature and immersing in liquid nitrogen Alternating Test |
| CN214778276U (en) * | 2021-05-19 | 2021-11-19 | 无锡伟烽精密模具有限公司 | Intelligent garbage classification device capable of automatically opening and closing cover |
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Application publication date: 20210129 |