CN112834362B - Liquid nitrogen refrigeration low temperature tensile test device - Google Patents

Liquid nitrogen refrigeration low temperature tensile test device Download PDF

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Publication number
CN112834362B
CN112834362B CN202011629192.4A CN202011629192A CN112834362B CN 112834362 B CN112834362 B CN 112834362B CN 202011629192 A CN202011629192 A CN 202011629192A CN 112834362 B CN112834362 B CN 112834362B
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box body
positioning
handle
block
groove
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CN112834362A (en
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林天委
任永沟
骆旭梁
陈影
陈亚琴
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Ningbo Yongan Testing Technology Co ltd
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Ningbo Yongan Testing Technology Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/18—Performing tests at high or low temperatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details

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  • Life Sciences & Earth Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract

The application relates to a liquid nitrogen refrigeration low temperature tensile test device relates to low temperature tensile test's technical field, and it is including setting up the installation position that just supplies the upper and lower both ends centre gripping of heat exchange tube sample on tensile test machine, and screw-thread fit has the connector of inserting in the heat exchange tube on the installation position, is provided with on the connector to supply the spacing connecting piece of heat exchange tube conflict, connecting piece and heat exchange tube welded fastening. This application has the unable ultra-low temperature tensile test of solution heat exchange tube, and prevents that the heat exchange tube sample from deformation, improves the effect of the accuracy of metal material mechanical properties test data under the ultra-low temperature state.

Description

Liquid nitrogen refrigeration low temperature tensile test device
Technical Field
The application relates to the field of tensile tests, in particular to a liquid nitrogen refrigeration low-temperature tensile test device.
Background
The tensile testing machine is also called a material tensile testing machine and a universal tensile strength testing machine, and is a new generation of mechanical detection equipment integrating computer control, automatic measurement, data acquisition, screen display and test result processing.
In the related art, as disclosed in chinese patent publication No. CN102645369A, a liquid nitrogen cooling low temperature tensile test apparatus is capable of performing low temperature tensile modulus test while maintaining the temperature in a stable environment. The device includes: the box body, the box cover and the stretching clamp; the box body and the box cover both comprise a cold accumulation inner container, a heat insulation plate and a fiber reinforced reinforcing layer so as to reduce the temperature fluctuation in the box body; the stretching clamp comprises a plastic pull rod, the upper side surface and the lower side surface of the box body are respectively provided with a through hole, and the plastic pull rod penetrates through the box body through the through holes so as to block a heat bridge effect and reduce the temperature change in the box body; the device is also provided with a thermometer, and the thermometer penetrates through the box cover and extends into the box body so as to observe the temperature change in the box body.
In view of the above-mentioned related art, the inventor believes that, once a round pipe needs to be detected, the stretching detection position needs to be continuously cooled by a low-temperature environment device, and both ends of the round pipe need to be stretched. When directly adopting anchor clamps to carry out the centre gripping to the both ends of pipe, in order to guarantee to fix, consequently to the both ends centre gripping deformation with the pipe, lead to the data detection inaccurate, there is improved space in addition.
Disclosure of Invention
In order to solve the problem that heat transfer ultra-low temperature performance tensile test can't develop, and reduce the deformation when fixing the pipe, provide reliable detection data, this application provides a liquid nitrogen refrigeration low temperature tensile test device.
The application provides a liquid nitrogen refrigeration low temperature tensile test device adopts following technical scheme:
the utility model provides a liquid nitrogen refrigeration low temperature tensile test device, includes tensile test machine and can directly use the connecting piece that the heat exchange tube carries out tensile test, the last installation position that is provided with the upper and lower both ends installation that supplies the pipe of tensile test machine, screw-thread fit has the connector of inserting in the pipe on the installation position, be provided with on the connector and supply the spacing connecting seat of pipe conflict, connecting seat and pipe welded fastening.
Through adopting above-mentioned technical scheme, through the setting of installation position to supply the connector to connect, and the upper and lower both ends of connector and pipe are fixed, pass through the welded mode after fixed the completion, fix between connector and the pipe, reduce the deformation when fixed to the pipe, improve the accuracy of detected data.
Optionally, the last heat sink that is used for the centre gripping pipe that still is provided with of tensile testing machine, the heat sink includes: the liquid nitrogen cylinder is placed on the ground and used for providing liquid nitrogen; the connecting pipe is arranged on the liquid nitrogen cylinder and used for supplying liquid nitrogen to discharge; the control valve is arranged between the liquid nitrogen cylinder and the connecting pipe and is used for controlling the opening and closing of the liquid nitrogen cylinder; the connecting bracket is arranged on the tensile testing machine; the box bodies are arranged on the connecting support, symmetrically hinged with each other, used for the penetration installation of the circular pipes and used for providing a low-temperature environment; the detection plate is arranged on the box bodies on the two sides and used for cooling the round pipe; the heat preservation layer is arranged between the box body and the detection plate and is used for preserving heat; the fixing component is arranged on the box body and is used for fixing the heat-insulating layer; the air inlet pipe sequentially penetrates through the box body, the heat insulation layer and the detection plate and supplies liquid nitrogen to flow onto the circular pipe; the gas outlet pipe sequentially penetrates through the box body, the heat preservation layer and the detection plate, supplies liquid nitrogen to flow out, and is arranged on the same detection plate together with the gas inlet pipe; the opening and closing assembly is arranged on the box body and is used for opening and closing the box body; the recovery cylinder is placed on the ground and used for collecting the liquid nitrogen flowing out of the gas outlet pipe; the thermocouple sensor is arranged on the detection plate different from the air outlet pipe; the circuit board is arranged on the box body and is connected with the thermocouple sensor; the protective covers are arranged on two sides of the box body and are respectively used for covering the connecting pipe and the circuit board; the heat insulation layer is provided with a first jack for inserting the air outlet pipe and the air inlet pipe, the heat insulation layer is provided with a second jack for installing the heating couple sensor, and the box body is provided with an installation cavity for installing the heat insulation layer.
Through adopting above-mentioned technical scheme, a liquid nitrogen section of thick bamboo is used for providing the liquid nitrogen, and the connecting pipe is used for transmitting the liquid nitrogen, and control opening and close through the control valve, linking bridge fixes the box, and the pick-up plate supplies the pipe to insert, thereby carry out the save of low temperature environment, the intake pipe is used for admitting air and giving vent to anger with nitrogen gas with the outlet duct, thereby the purpose that low temperature environment was made to nitrogen gas has been played, and fix the heat preservation through fixed subassembly, open and close the subassembly and be used for controlling opening and close of box.
Optionally, the fixing assembly includes: the inserting block is arranged on one side of the heat-insulating layer close to the box body and is used for being inserted into the box body; the inserting table is arranged on one side of the inserting block, which is far away from the shell, and is fixedly connected with the heat-insulating layer; the connecting column is arranged on the box body;
the connecting piece is inserted and limited on the insert block and is in threaded fit with the connecting column; the connecting platform is arranged on one side of the connecting column, which is far away from the box body, has a diameter smaller than that of the connecting piece, and is inserted into the thread groove; the elastic sheet is arranged on the connecting piece and is positioned at the bottom of the thread groove; the clamping ball is arranged on one side of the elastic sheet close to the connecting table, and is clamped and fixed with the connecting table after the connecting column is in threaded fit with the connecting piece; the fixing column is arranged on the connecting piece; the fixed pressure spring is sleeved and clamped on the fixed column; the first connecting piece is arranged on one side, far away from the fixed column, of the fixed pressure spring; the bearing is arranged on the connecting table; the second connecting piece is arranged on the inner ring of the bearing and is in abutting connection with the first connecting piece; the first rotating bulge is arranged on one side of the first connecting piece, which is close to the second connecting piece; the second rotating bulge is arranged on one side of the second connecting piece close to the first connecting piece and is mutually limited with the first rotating bulge when the connecting column is in threaded fit with the connecting piece; be provided with on the heat preservation and supply the inserted block to insert spacing first slot, set up on the box and supply inserted block male second slot, set up on the heat preservation and supply the insertion groove that inserts a platform installation, inserted block and insert bench all set up and supply connecting piece male patchhole, be provided with on the connecting piece and supply spliced pole screw-thread fit's thread groove, connect the bench and set up the first annular that supplies joint ball joint, it sets up the groove to connect the outer loop that the bench is provided with the confession bearing and inlays the groove of establishing.
Through adopting above-mentioned technical scheme, through the setting of inserted block and insertion platform to fix the heat preservation, thereby the spliced pole will be fixed with the box through inserted block and insertion platform, connect the joint ball on platform and the elastic sheet and carry out joint each other, thereby holistic stability has been improved. Through the setting of fixed post to supply fixed pressure spring to install, through inserting the second connecting piece that the bench was installed through the bearing, thereby it is spacing to make first connecting piece contradict mutually with the second connecting piece, and it is spacing mutually through first rotatory arch and the rotatory arch of second.
Optionally, still be provided with locating component on the inserted block, be provided with the location mounting groove that supplies locating component installation on the inserted block, be provided with the locating hole that supplies locating component location on the box, locating component includes: the positioning cylinder is arranged in the positioning installation groove; the limiting ball protrudes out of the positioning cylinder and is clamped in the positioning hole; the positioning pressure spring is arranged on the positioning ball and arranged along the length direction of the positioning cylinder; the positioning cover is arranged on the positioning cylinder and is fixedly connected with one end of the positioning pressure spring, which is far away from the positioning ball; the first positioning magnetic block is arranged on one side, close to the positioning pressure spring, of the positioning cover; the second positioning magnetic block is arranged on one side of the positioning ball, which is far away from the positioning cover, and is mutually repelled with the first positioning magnetic block; the third positioning magnetic block is arranged on one side of the box body close to the positioning ball and mutually attracts the second positioning magnetic block; the positioning device is characterized in that a positioning installation cavity for installing a positioning ball and a positioning pressure spring is formed in the positioning cylinder, a positioning limiting hole for limiting and protruding the positioning ball is formed in the positioning cylinder, a first limiting groove for installing a first positioning magnetic block is formed in the positioning cover, a second limiting groove for installing a second positioning magnetic block is formed in the positioning ball, and a third positioning groove for installing a third positioning magnetic block and communicating with the positioning hole is formed in the box body.
Through adopting above-mentioned technical scheme, setting through location ball in the location section of thick bamboo to it is fixed to carry out the joint of each other with the locating hole, and the location pressure spring is contradicted the location ball and is compressed tightly, and the location lid is used for the lid to close a location section of thick bamboo, and first location magnetic path and second location magnetic path repel each other, thereby improve the restoring force of location pressure spring, and third location magnetic path and second location magnetic path attract each other, thereby improved the stability that the location ball is located the locating hole, therefore, the practicality is strong.
Optionally, a first magnet is arranged on one side of the heat insulation layer close to the box body, and a first mounting groove for mounting the first magnet is further arranged on one side of the heat insulation layer close to the box body; a second magnet is arranged on one side, close to the heat preservation layer, of the box body, the first magnet and the second magnet attract each other, a clamping cylinder for mounting the second magnet is arranged on the box body, a first placing groove for inserting the clamping cylinder is formed in the box body, a second placing groove for mounting the second magnet is formed in the clamping cylinder, a clamping block is arranged on one side, far away from the first magnet, of the clamping cylinder, and a clamping groove for clamping the clamping block is formed in the box body;
a clamping ring is arranged on one side, close to the first magnet, of the clamping cylinder, and a second annular groove for clamping the clamping ring is formed on one side, close to the clamping cylinder, of the second magnet; still be provided with the closing cap that is used for the lid to close second magnet on the joint section of thick bamboo, be provided with the seal groove that supplies the closing cap lid to close on the joint section of thick bamboo, be provided with the reference column on the closing cap, be provided with the constant head tank that supplies the reference column to insert the joint on the joint section of thick bamboo.
Through adopting above-mentioned technical scheme, through the setting of first magnet, the use of cooperation second magnet to make the actuation of each other between heat preservation and the box, improved holistic stability, and first mounting groove supplies first magnet to assemble, in order to improve holistic stability, better fixed. The second magnet is installed through a joint section of thick bamboo, and a joint section of thick bamboo is fixed mutually with first mounting groove, and the second mounting groove then supplies the second magnet to place, the setting of fixture block, the use in cooperation joint groove to the fixity between a joint section of thick bamboo and the box has been improved, and need not use tools, just can accomplish the installation. Through the setting of snap ring, the use of cooperation second annular, further improvement the stability between joint section of thick bamboo and the second magnet, reduce the problem that second magnet dropped. Through the setting of closing cap to further fix second magnet, and the setting in seal groove supplies the closing cap to cover and closes, and the setting of reference column, the use of cooperation constant head tank, thereby improved the fixed ability of closing cap, the practicality is strong.
Optionally, the opening and closing assembly includes: the buckle seat is arranged on one side of the box body, which is far away from the pin joint; the lock seat is arranged on one side of the box body far away from the pin joint and is positioned on a box body different from the buckle seat; the breaking-off block is hinged on the lock seat; the connecting sheet is hinged to one side of the breaking-off block, which is far away from the lock seat; the locking strip is arranged on one side of the connecting sheet, which is far away from the lock seat, and is connected and buckled with the buckling seat; the first handle is arranged on one side of the box body, which is far away from the hinge joint; the first lifting assembly is arranged on the first handle and used for lifting the breaking-off block so as to separate the lock bar from the buckle seat; the second handle is arranged on one side of the box body far away from the hinge joint and is positioned on a different box body from the first handle; and the second lifting assembly is arranged on the second handle and is used for lifting the lock bar to separate from the buckle seat.
Through adopting above-mentioned technical scheme, through the setting of hasp and lock seat to lock between two boxes, and the locking is fixed through breaking off with the fingers and thumb piece, connection piece and locking strip, and the first lifting subassembly on the first in command, the second lifting subassembly on the cooperation second is handle, thereby breaks away from seat and locking strip with the control.
Optionally, the first lifting assembly comprises: the first cover plate is connected to one side, close to the box body, of the first handle in a sliding mode; the first mounting block is connected to the first cover plate in a sliding manner; the first limiting plate is arranged on one side, close to the first handle, of the first mounting block and is mutually limited with the first cover plate; the first transmission rod is arranged on one side, away from the first mounting block, of the first limiting plate and moves synchronously with the first limiting plate; the first pressure spring is arranged on the first handle, the other end of the first pressure spring is abutted against the first limiting plate and/or the first transmission rod to be compressed, and the first pressure spring is used for driving the first limiting plate and the first transmission rod to be far away from one side far away from the first handle; the first connecting seat is arranged on one side of the breaking-off block, which is far away from the box body; the first connecting rod is used for hinging the first connecting seat and the first transmission rod; the first tension spring is arranged between the first connecting rod and the first handle and is used for driving the first connecting rod to approach towards the direction of the first handle; the first handle is provided with a first sliding groove for a first cover plate to be slidably mounted, the first cover plate is provided with a first movable groove for a first connecting rod to move, and the first cover plate is provided with a first moving groove for a first mounting block to slide and a first limiting plate to limit mutually; the first pressure spring pushes the first mounting block out to one side far away from the first handle for resetting, the first limiting plate and the first cover plate are limited mutually, and the first transmission rod is connected with the first handle through the first tension spring.
By adopting the technical scheme, the first mounting block is matched with the first limiting plate, so that the first mounting block is pressed on the first cover plate and then reset by combining the first pressure spring; and first transfer lever carries out synchronous motion with first limiting plate, and first extension spring is injectd the head rod to the auxiliary motion, the setting of first connecting seat will be convenient for open the piece through the first connecting rod with breaking off with the fingers and thumb.
Optionally, the second lift assembly comprises: the second cover plate is connected to one side, close to the box body, of the second handle in a sliding mode; the second mounting block is connected to the second handle in a sliding manner; the second limiting plate is arranged on one side, close to the second cover plate, of the second mounting block and is mutually limited with the second handle; the second connecting seat is arranged on the second handle; the second transmission rod is hinged to the second connecting seat, and one end of the second transmission rod is controlled by the second limiting plate; the second movable wheel is rotatably connected to one side, close to the second limiting plate, of the second transmission rod and is in abutting connection with the second limiting plate; the second connecting rope is used for connecting one side of the second transmission rod, which is far away from the second limiting plate, with the locking bar; the second pressure spring is arranged on the second cover plate, the other end of the second pressure spring is abutted against the second limiting plate and is pressed tightly, and the second pressure spring is used for driving the second limiting plate to move away from one side far away from the second handle; the second handle is provided with a second sliding groove for sliding installation of the second cover plate, the second cover plate is provided with a second movable groove for movement of the second connecting rope, and the second handle is provided with a second movable groove for sliding of the second installation block and mutual limiting with the second limiting plate.
Through adopting above-mentioned technical scheme, the setting of second installation piece cooperation second limiting plate to make the second installation piece press on the second apron, and second connecting seat and the pin joint of second transfer line, thereby the setting of cooperation second loose wheel, thereby make the second transfer line carry out the atress under the drive of second limiting plate, the second pressure spring is used for resumeing the second installation piece, and the second transfer line will drive the second and connect the rope, thereby drive the locking strip and lift up.
Optionally, the connecting piece comprises a rotating plate pivoted with the breaking-off block, a locking plate for fixing the locking bar and a locking tension spring; the locking tension spring drives the rotating plate and the locking plate to approach each other, the locking tension spring is sleeved on the rotating plate and the locking plate, one end of the locking tension spring is fixed with the rotating plate, and the other end of the locking tension spring is fixed with the locking plate; the rotating plate is provided with a sliding block, the locking plate is provided with a sliding groove for the sliding block to slide along the length direction of the locking plate, the sliding block is provided with a cover block for fixing the rotating plate to the locking plate, the cover block is connected with the locking plate in a sliding mode, the first handle and the second handle are both provided with handle seats, and the box body is provided with handle grooves for mounting the handle seats; a clamping hook is arranged on one side, close to the box body, of the handle seat, an embedded groove into which the clamping hook is inserted is formed in the box body, and a clamping groove which is used for sliding and fixing the clamping hook and is communicated with the embedded groove is formed in the box body; the handle seat is provided with a rotating groove for the rotating column to penetrate through for rotation, a rotating disc is coaxially arranged on one side of the rotating column, which is far away from the box body, and the rotating disc is limited on one side of the handle seat, which is far away from the box body; the box body is provided with a rotating groove for the clamping hook to be rotationally clamped, the rotating disc is provided with a plurality of rotating columns, and the rotating columns are provided with rotating holes for the rotating columns to be inserted; the handle seat is provided with a hook, a rotating hook and a handle seat, wherein the rotating hook is arranged on the handle seat, and the rotating hook is arranged on the handle seat.
Through adopting above-mentioned technical scheme, through the setting of rotating the post, the use in cooperation rotary trough to rotate the pothook, and the setting of carousel, further improvement maneuverability, and the setting in rotary trough supplies the pothook to rotate, thereby has improved holistic stability. Through the setting of rotating the post, the use in cooperation rotation hole to can stabilize between carousel and the rotation post, improve stability between the two, reduce and skid. Through the setting of the piece that grips, conveniently supply the hand to grip, improved people to carousel pivoted efficiency, conveniently operate. The setting of instruction piece makes people when rotating through the carousel, can see the direction to reduce and change wrong direction, in order to reduce the damage to the pothook, improve life.
Optionally, the tensile testing machine is further provided with a containing box for containing liquid nitrogen and an installation rod, the box body is provided with an articulated piece, the two box bodies are connected by the articulated piece, and the articulated piece is further provided with a threaded rod for connecting the articulated piece in a penetrating manner and a locking nut for locking the threaded rod; the connection bracket includes: the connecting ring is arranged on the mounting rod; the connecting frame is arranged on the mounting rod and is matched and locked with the connecting ring; the first connecting rod is arranged on the connecting frame and is used for connecting the connecting frames on the two sides; the first connecting transverse frame is rotatably connected to the first connecting rod and is positioned between the connecting frames at the two sides; the second connecting rod is arranged on one side of the first connecting frame, which is far away from the first connecting rod; the crossbearer is connected to the second, rotates to be connected on the rod is connected to the second, and contradicts with first connection crossbearer, and keeps away from one side that the rod was connected to the second and supplies the threaded rod to wear to establish to contradict spacingly with the articulated elements and support in order to realize.
Through adopting above-mentioned technical scheme, through the setting that holds the box to the liquid nitrogen that supplies to spill can be collected, reduces the influence to tensile testing machine, and go-between cooperation link picture is fixed with the installation pole, thereby makes the first connection crossbearer under the first connecting rod is connected fix, and first connection crossbearer is connected the crossbearer through second connecting rod and second and is fixed, thereby fixes the box, also is convenient for adjust.
In summary, the present application includes at least one of the following beneficial technical effects: 1. an ultra-low temperature tensile test method of the heat exchange tube; 2. deformation of the round pipe during fixing is reduced, and accuracy of detection data is improved; 3. the position of the box body is convenient to adjust; 4. the safety of opening the box body is improved.
Drawings
FIG. 1 is a schematic view of the structure of a low-temperature tensile testing apparatus.
Fig. 2 is a schematic view of the structure of the circular tube installation.
Fig. 3 is a schematic view of the structure of the connecting bracket.
FIG. 4 is a first schematic view of the installation of the box body and the insulating layer.
FIG. 5 is a second schematic view of the installation of the box body and the insulating layer.
Fig. 6 is a schematic view of the installation of the case and the protective cover.
Fig. 7 is an enlarged schematic view of the second magnet in the portion a of fig. 5.
Fig. 8 is an enlarged schematic view of the second connector at the portion B in fig. 5.
Fig. 9 is an exploded view of the first securing assembly.
Fig. 10 is an exploded view of the securing assembly.
Fig. 11 is an enlarged schematic view of the positioning assembly of part C of fig. 9.
Fig. 12 is an enlarged schematic view of the positioning assembly of part D of fig. 10.
FIG. 13 is a first view illustrating the installation of the first handle, the second handle and the box body.
FIG. 14 is a second schematic view of the mounting of the first handle, the second handle and the case.
Fig. 15 is an enlarged schematic view of the hook of part E in fig. 13.
Fig. 16 is an enlarged schematic view of the hook of the portion F in fig. 14.
Figure 17 is an exploded view of the first handle.
Figure 18 is an exploded view of the second handle.
Fig. 19 is an exploded view of the first handle.
Fig. 20 is an exploded view of the second handle.
Description of reference numerals: 1. a tensile testing machine; 100. a circular tube; 101. an installation position; 102. a connector; 103. a connecting seat; 104. mounting a rod; 2. a cooling device; 200. a liquid nitrogen cylinder; 201. a connecting pipe; 202. a control valve; 203. a box body; 204. detecting a plate; 205. a heat-insulating layer; 206. an air inlet pipe; 208. an air outlet pipe; 209. a recovery cylinder; 210. a thermocouple sensor; 211. a circuit board; 212. a protective cover; 213. a first jack; 214. a second jack; 215. a mounting cavity; 3. connecting a bracket; 300. a connecting ring; 301. a connecting frame; 302. a first connecting rod; 303. a first connecting cross frame; 304. a second connecting stick; 305. a second connecting cross frame; 306. a containing box; 307. an articulation member; 308. a threaded rod; 309. a locking nut; 4. a fixing assembly; 400. inserting a block; 401. an insertion station; 402. connecting columns; 403. a connecting member; 404. a connecting table; 405. an elastic sheet; 406. clamping the ball; 407. fixing a column; 408. fixing a pressure spring; 409. a first connecting member; 410. a bearing; 411. a second connecting member; 412. a first rotary lobe; 413. a second rotary lobe; 414. a first slot; 415. a second slot; 416. inserting the groove; 417. an insertion hole; 418. a thread groove; 419. a first ring groove; 420. embedding a groove; 5. a positioning assembly; 500. positioning the mounting groove; 501. positioning holes; 502. a positioning cylinder; 503. a positioning ball; 504. positioning a pressure spring; 505. a positioning cover; 506. a first positioning magnetic block; 507. a second positioning magnetic block; 508. a third positioning magnetic block; 509. positioning the installation cavity; 510. positioning a limiting hole; 511. a first limit groove; 512. a second limit groove; 513. a third positioning groove; 6. an opening and closing assembly; 60. a buckle seat; 61. a lock seat; 62. breaking off the blocks; 63. connecting sheets; 64. a locking bar; 65. a first handle; 66. a first lift assembly; 660. a first cover plate; 661. a first mounting block; 662. a first limit plate; 663. a first drive lever; 664. a first pressure spring; 665. a first connecting seat; 666. a first connecting rod; 667. a first tension spring; 668. a first sliding groove; 669. a first movable slot; 670. a first moving slot; 67. a second handle; 68. a second lift assembly; 680. a second cover plate; 681. a second mounting block; 682. a second limiting plate; 683. a second connecting seat; 684. a second transmission rod; 685. a second movable wheel; 686. a second connecting rope; 687. a second pressure spring; 688. a second sliding groove; 689. a second movable slot; 690. a second moving slot; 700. a first magnet; 701. a first mounting groove; 702. a second magnet; 704. a clamping cylinder; 705. a first mounting groove; 706. a second mounting groove; 707. a clamping block; 708. a clamping groove; 709. a snap ring; 710. a second ring groove; 711. sealing the cover; 712. sealing the groove; 713. a positioning column; 714. positioning a groove; 800. a rotating plate; 801. a locking plate; 802. locking the tension spring; 803. a slider; 804. a chute; 805. a cover block; 806. a handle base; 807. a handle slot; 808. a hook; 809. caulking grooves; 810. a card slot; 811. rotating the column; 812. rotating the groove; 813. a turntable; 814. a rotating groove; 815. turning the column; 816. rotating the hole; 817. a holding block; 818. the block is indicated.
Detailed Description
The present application is described in further detail below with reference to figures 1-20.
The embodiment of the application discloses liquid nitrogen refrigeration low temperature tensile test device, low temperature tensile test device include tensile test machine 1, be used for providing low temperature environment's heat sink 2, and the cooling subassembly includes a liquid nitrogen section of thick bamboo 200, connecting pipe 201, control valve 202, linking bridge 3, box 203, pick-up plate 204, heat preservation 205, fixed subassembly 4, intake pipe 206, outlet duct 208, open and close subassembly 6, a recovery section of thick bamboo 209, thermocouple sensor 210, circuit board 211 and safety cover 212. Thereby reduce the deformation when fixed to pipe 100, pipe 100 also can be other tubular products for the heat exchange tube, improves the accuracy of detection data.
Referring to fig. 1 and 2, a mounting position 101 is mounted on a tensile testing machine 1, the mounting position 101 is used for mounting the upper end and the lower end of the round pipe 100, and the mounting position 101 moves up and down on the tensile testing machine 1, so that the round pipe 100 is stretched, reset and retracted.
Threaded fit has connector 102 on the connection position, and an organic whole is provided with on connector 102 and connects platform 404, and connector 102 is used for inserting in pipe 100 to pipe 100 contradicts with connecting platform 404, connects fixedly through the mode of foot welding seam at last, and pipe 100 is the titanium pipe, also can change other test materials.
Referring to fig. 1 and 2, the liquid nitrogen cylinder 200 and the recovery cylinder 209 are both placed on the ground and are transmitted through a connection pipe 201, wherein a control valve 202 for controlling the liquid nitrogen in the liquid nitrogen cylinder 200 to enter and exit is installed between the connection pipe 201 and the liquid nitrogen cylinder 200, and the control valve 202 is an electronic valve and is controlled thereby.
The mounting rod 104 attached to the tensile testing machine 1 is used to fix the connecting bracket 3, so that the connecting bracket 3 fixes the case 203. And in order to reduce the damage of the liquid nitrogen to the tensile testing machine 1, a containing box 306 is installed at the bottom, so that the leaked liquid nitrogen is collected.
Referring to fig. 3, the boxes 203 are symmetrically arranged, and hinges 307 are fixed on the boxes 203 by bolts, and the hinges 307 connect the boxes 203 on both sides to realize the pivot fixing. The hinge 307 is further provided with a threaded rod 308 for connecting the hinge 307, and the threaded rod 308 is threadedly engaged with a locking nut 309.
The connecting bracket 3 includes a connecting ring 300, a connecting frame 301, a first connecting stick 302, a first connecting cross frame 303, a second connecting stick 304, and a second connecting cross frame 305.
Wherein, the connecting frame 301 is fixed on the mounting rod 104 by matching with the connecting ring 300, and the connecting frame 301 and the connecting ring 300 are locked by bolts, thereby clamping on the mounting rod 104. The connecting frame 301 is connected with a first connecting rod 302, the first connecting rod 302 is used for connecting the connecting frames 301 on two sides, the first connecting rod 302 further connects the connecting frame 301 with a first connecting cross frame 303, and the connecting frames 301 are located on the upper side and the lower side of the first connecting cross frame 303.
One end of the first connecting cross frame 303, which is far away from the first connecting stick 302, is connected with a second connecting cross frame 305, and the first connecting cross frame 303 and the second connecting cross frame 305 are connected through a second connecting stick 304; and one side of the second connecting cross frame 305 far away from the second connecting rod 304 is provided for the threaded rod 308 to penetrate, and one side of the second connecting cross frame 305 far away from the first connecting cross frame 303 supports the pivot joint member in an abutting manner. Thereby adjusting the position of the case 203.
Referring to fig. 4 and 5, the structure of the box 203 and the insulating layer 205 will be described by taking one side as an example. The box body 203 is fixed with the detection plate 204 through bolts, an insulating layer 205 is arranged between the box body 203 and the detection plate 204, and the box body 203 is provided with an installation cavity 215 for installing the insulating layer 205. And a fixing component 4 fixed with the box body 203 is also arranged on one side of the insulating layer 205 close to the box body 203.
Referring to fig. 4 and 5, the insulating layer 205 is made of an insulating material, and is selected according to actual situations, and is common general knowledge of those skilled in the art, and will not be described herein. The first magnet 700 is mounted on one side of the insulating layer 205 close to the box body 203, a first mounting groove 701 for mounting the first magnet 700 is further formed in one side of the insulating layer 205 close to the box body 203, and the first magnet 700 is bonded and fixed with the insulating layer 205 through epoxy resin glue.
Referring to fig. 4 and 7, a clamping cylinder 704 is disposed on one side of the box 203 close to the insulating layer 205, and a first receiving groove 705 for the clamping cylinder 704 to be inserted into is formed on the box 203. A plurality of clamping blocks 707 are integrally arranged on the outer side wall of the clamping cylinder 704, a clamping groove 708 for clamping the clamping blocks 707 is formed in the box body 203, and the clamping groove 708 is communicated with the first placing groove 705.
Referring to fig. 4 and 7, a second magnet 702 attracting the first magnet 700 is installed in the clamping cylinder 704, and a second receiving groove 706 for installing the second magnet 702 is formed in the clamping cylinder 704. A snap ring 709 is integrally arranged on the second magnet 702, the snap ring 709 is arranged on one side of the clamping cylinder 704 close to the first magnet 700, and a second annular groove 710 for clamping the snap ring 709 is arranged on one side of the second magnet 702 close to the clamping cylinder 704.
Referring to fig. 4 and 7, a sealing cover 711 for covering the second magnet 702 is installed on the clamping cylinder 704, a sealing groove 712 for covering the sealing cover 711 is formed in the clamping cylinder 704, a positioning column 713 is integrally formed on the sealing cover 711, a positioning groove 714 for inserting and clamping the positioning column 713 is formed in the clamping cylinder 704, and if necessary, glue may be added into the clamping groove 708 for reinforcement.
Referring to fig. 5 and 6, an air inlet pipe 206 and an air outlet pipe 208 for nitrogen to circulate are installed in the box body 203 on one side, a first insertion hole 213 for inserting the air outlet pipe 208 and the air inlet pipe 206 is formed in the heat insulating layer 205, and the air outlet pipe 208 and the air inlet pipe 206 are also provided through the detection plate 204, so that nitrogen is provided. There are four first insertion holes 213, three of which 213 are respectively located at the upper, middle and lower positions of the detection plate 205 for communicating the air inlet pipe 206, and the other 213 is for communicating the air outlet pipe. The box 203 on the other side is provided with a plurality of thermocouple sensors 210, and the thermocouple sensors 210 penetrate through the insulating layer 205 and the detection plate 204, so that the temperature of the pipeline 12 is detected. The insulating layer 205 is provided with a second jack 214 for mounting the thermocouple sensor 210.
The box 203 is provided with a protective cover 212 through bolts, the protective cover 212 is used for covering the air outlet pipe 208 and the air inlet pipe 206 on the box 203 on one side, and the protective cover 212 is used for covering the thermocouple sensor 210 on the other side, so that the protective function is achieved.
Referring to fig. 8 and 9, the fixing assembly 4 includes an insert block 400, an insert table 401, a connection column 402, a connection member 403, a connection table 404, an elastic sheet 405, a snap ball 406, a fixing column 407, a fixing compression spring 408, a first connection member 409, a bearing 410, a second connection member 411, a first rotation protrusion 412, and a second rotation protrusion 413.
Referring to fig. 5 and 9, the insertion stage 401 and the insertion block 400 are integrally disposed, the insertion block 400 is located on one side of the insulating layer 205 close to the box body 203 and is inserted into the box body 203 after being inserted into the insulating layer 205, and the insertion stage 401 and the insulating layer 205 are fixedly connected after being inserted into the rear suspension. The insulating layer 205 is provided with a first slot 414 for the insertion of the insertion block 400 to limit, and the insulating layer 205 is provided with an insertion slot 416 for the insertion table 401 to mount.
Referring to fig. 8 and 10, the connecting member 403 is inserted and retained on the insert block 400 and is screw-engaged with the connecting column 402, thereby fixing the insulating layer 205. The box 203 is provided with a second slot 415 for inserting the insert 400, and the connecting column 402 is located in the second slot 415 of the box 203.
The connection table 404 is integrally arranged on the side of the connection column 402 away from the box body 203, the diameter of the connection table 404 is smaller than that of the connection piece 403, and the connection table 404 is inserted into the thread groove 418. The bearing 410 is embedded on the connecting table 404, an embedding groove 420 for interference fit of an outer ring of the bearing 410 is formed in the connecting table 404, the bearing 410 is used for connecting a second connecting piece 411 which is expected by the connecting table 404, the second connecting piece 411 is in interference fit with an inner ring of the bearing 410, and the second rotating protrusion 413 is located on the second connecting piece 411. The insertion block 400 and the insertion platform 401 are both provided with insertion holes 417 into which the connection members 403 are inserted.
The fixed column 407 and the connecting piece 403 are integrally disposed, and the fixed column 407 is located at the bottom of the thread groove 418, and the elastic sheet 405 is sleeved and fixed, the bottom of the elastic sheet 405 is in a circular sheet shape, and the top of the elastic sheet 405 is in a vertical sheet shape.
One end of the fixed pressure spring 408 is sleeved and clamped on the fixed column 407, is positioned in the elastic sheet 405, and does not interfere with the elastic sheet 405, while the other end of the fixed pressure spring 408 is bonded with the first connecting piece 409 through glue, the first rotating protrusion 412 is positioned on the first connecting piece 409, and the first rotating protrusion 412 and the second rotating protrusion 413 are mutually limited; and the connecting post 402 is mutually limited with the first rotary protrusion 412 when being in threaded engagement with the connecting member 403.
The bolt passes through the connecting piece 403, then passes through the fixed compression spring 408, and presses the elastic sheet 405 to be in threaded fit with the fixed column 407.
Referring to fig. 8 and 10, the snap-fit ball 406 is located on one side of the elastic sheet 405 close to the connecting platform 404, and a first ring groove 419 for the snap-fit ball 406 to snap is formed on the connecting platform 404.
Referring to fig. 5 and 8, the insert block 400 is further provided with a positioning assembly 5.
Referring to fig. 9 and 12, the positioning assembly 5 includes a positioning cylinder 502, a positioning ball 503, a positioning compression spring 504, a positioning cover 505, a first positioning magnetic block 506, a second positioning magnetic block 507, and a third positioning magnetic block 508.
The insert block 400 is provided with a positioning installation groove 500 for installing the positioning component 5, the positioning cylinder 502 is fixed in the positioning installation groove 500, the positioning cylinder 502 is provided with a positioning installation cavity 509 for installing the positioning ball 503 and the positioning compression spring 504, and the positioning cylinder 502 is provided with a positioning limit hole 510 for limiting the protrusion of the positioning ball 503.
The positioning ball 503 protrudes out of the positioning cylinder 502 in a limiting manner, a second limiting groove 512 for mounting a second positioning magnetic block 507 is formed in the positioning ball 503, the positioning pressure spring 504 and the second positioning magnet are fixed through glue, the other positioning pressure spring 504 is bonded with the first positioning magnetic block 506 through glue, a first limiting groove 511 for mounting the first positioning magnetic block 506 is formed in the positioning cover 505, and the positioning cover 505 and the positioning cylinder 502 are fixed through ultrasonic welding.
Referring to fig. 8, the box 203 is provided with a positioning hole 501 for the positioning ball 503 to be clamped and positioned, and the box 203 is provided with a third positioning slot 513 for the third positioning magnetic block 508 to be mounted and to be communicated with the positioning hole 501.
Referring to fig. 8 and 11, the second positioning magnetic block 507 and the first positioning magnetic block 506 repel each other to assist the positioning compression spring 504 to recover deformation. The third positioning magnetic block 508 and the second positioning magnetic block 507 attract each other to keep the positioning ball 503 in the positioning hole 501.
Referring to fig. 13, a first handle 65 and a second handle 67 are provided on the side of the box 203 away from the pivot, and the box 203 on one side is operated by the first handle 65 and the box 203 on the other side is operated by the second handle 67.
Referring to fig. 13 and 14, a buckle seat 60 and a lock seat 61 are fixed on one side of the box 203 away from the pivot joint through bolts, and the buckle seat 60 and the lock seat 61 are located on different boxes 203. One side of the lock seat 61 close to the buckle seat 60 is hinged with a breaking block 62, one side of the breaking block 62 far away from the lock seat 61 is hinged with a connecting sheet 63, and one side of the connecting sheet 63 far away from the lock seat 61 is fixed with a lock bar 64 connected and buckled with the buckle seat 60.
Referring to fig. 13 and 14, the coupling piece 63 includes a rotating plate 800, a locking plate 801, and a locking tension spring 802. The rotating plate 800 is symmetrically arranged and pivotally connected with the snapping block 62, the locking plate 801 is connected with the rotating plate 800 in a sliding manner and used for fixing the locking bar 64, and the locking compression spring is sleeved on the locking plate 801 and the rotating plate 800.
A sliding block 803 is integrally arranged on one side of the rotating plate 800 close to the locking plate 801, a sliding groove 804 for allowing the sliding block 803 to slide along the length direction of the locking plate 801 is formed in the locking plate 801, a cover block 805 for fixing the rotating plate 800 to the locking plate 801 is fixed on the sliding block 803 through bolts, and the cover block and the locking plate 801 are abutted and slid.
The locking tension spring 802 drives the rotating plate 800 and the locking plate 801 to close each other, and one end of the locking tension spring 802 is fixedly inserted into the rotating plate 800, and the other end of the locking tension spring 802 is fixedly inserted into the locking plate 801, and can be reinforced by epoxy resin glue when necessary.
Referring to fig. 14 and 15, the first handle 65 and the second handle 67 are uniformly and integrally provided with handle seats 806, and the box 203 is provided with handle grooves 807 for mounting the handle seats 806. The handle seat 806 is provided with a hook 808 on one side close to the box body 203, the box body 203 is provided with an embedding groove 809 for inserting the hook 808, the box body 203 is provided with a clamping groove 810 for sliding the hook 808 downwards and fixing, and the clamping groove 810 is communicated with the embedding groove 809.
Referring to fig. 15 and 16, a rotation column 811 is integrally disposed on one side of the hook 808 close to the handle seat 806, and a rotation slot 812 for the rotation column 811 to pass through is disposed on the handle seat 806.
Rotate post 811 and keep away from the one end of pothook 808 and install carousel 813, carousel 813 and the coaxial setting of rotation post 811, carousel 813 is spacing in one side that box 203 was kept away from to handle seat 806, set up the rotation groove 814 that supplies the rotatory joint of pothook 808 on the box 203, pothook 808 is when the installation, preferably down so that slide downwards in step with handle seat 806, handle groove 807 also supplies handle seat 806 to slide this moment, thereby make pothook 808 insert in the rotating groove 812, the rethread is rotatory, thereby get into and rotate and lock in the groove 814.
Referring to fig. 15 and 16, a plurality of rotation posts 815 are integrally formed on the rotation plate 813, rotation holes 816 into which the rotation posts 811 are inserted are formed in the rotation posts 811, and the rotation posts 815 are coated with epoxy glue as necessary, thereby reinforcing the rotation plate 813 and the rotation posts 811.
A holding block 817 is integrally arranged on the side of the rotary plate 813 away from the handle seat 806, and the holding block 817 is held by a hand to operate the rotary plate 813. In order to improve the indicating capability, an indicating block 818 for indicating the rotation locking direction of the hook 808 is integrally provided on the dial 813.
Referring to FIG. 13, a first lift assembly 66 is also mounted to the first handle 65. The first lifting assembly 66 is used for lifting the breaking block 62 to separate the locking bar 64 from the buckle base 60.
Referring to fig. 17 and 18, the first lifting assembly 66 includes a first cover plate 660, a first mounting block 661, a first limit plate 662, a first transmission rod 663, a first compression spring 664, a first connection seat 665, a first connection rod 666 and a first tension spring 667.
The first cover plate 660 slides on the first handle 65, a first sliding groove 668 for the sliding installation of the first cover plate 660 is arranged on the first handle 65, and the first cover plate 660 is fixed with the first handle 65 through bolts after the sliding fit.
The first limit plate 662 is integrally arranged with the first mounting block 661, the first cover plate 660 is provided with a first moving groove 670 for the first mounting block 661 to slide, the first moving groove 670 also provides the first limit plate 662 to limit each other, and the first transmission rods 663 are symmetrically arranged at two sides of the first limit plate 662; under the movement of the first mounting block 661, the first driving rod 663 moves synchronously with the first stopper plate 662.
The first pressure spring 664 is bonded to the first handle 65 through epoxy glue, and the other end of the first pressure spring 664 is bonded and fixed to the first limit plate 662, so that the first pressure spring 664 is located between the first handle 65 and the first limit plate 662, and the first pressure spring 664 can also be located between the first handle 65 and the first transmission rod 663.
The first pressure spring 664 is used for driving the first limiting plate 662 and the first transmission rod 663 to be away from one side away from the first handle 65, namely the first pressure spring 664 pushes the first mounting block 661 to be reset towards the side away from the first handle 65, the first limiting plate 662 and the first cover plate 660 are limited mutually, and a worker adjusts the number and the position of the first pressure spring 664 according to actual conditions.
A first tension spring 667 is installed between the first connecting rod 666 and the first handle 65, one end of the first tension spring 667 is provided for penetrating through the first connecting rod 666, and is reinforced through epoxy resin glue; the first handle 65 is connected to the other end of the first handle 65 and is reinforced by epoxy glue. The first tension spring 667 is used for driving the first link rod 666 to move toward the first handle 65, and the tension of the first tension spring 667 is smaller than the pressure of the first compression spring 664.
One end of the first connecting rod 666 is hinged to one side of the first transmission rod 663 far away from the first limiting plate 662, the first connecting seat 665 is integrally arranged at one side of the breaking-off block 62 close to the first handle 65, and the other end of the first connecting rod 666 is hinged to the first connecting seat 665, and the first cover plate 660 is provided with a first movable groove 669 for the first connecting rod 666 to move, so that the first connecting seat 665 and the breaking-off block 62 are lifted together through the first connecting rod 666.
Referring to fig. 14, a second lift assembly 68 is also mounted to the second handle 67. The second lifting assembly 68 is used to lift the locking bar 64 out of the socket 60.
Referring to fig. 19 and 20, the second lifting assembly 68 includes a second cover plate 680, a second mounting block 681, a second limit plate 682, a second coupling seat 683, a second transmission rod 684, a second movable sheave 685, a second connection cord 686, and a second compression spring 687. The second cover plate 680 is slidably connected to one side of the second handle 67 close to the box 203, a second sliding groove 688 for slidably mounting the second cover plate 680 is formed in the second handle 67, and the second cover plate 680 is fixedly connected to the second handle 67 through bolts.
Second installation piece 681 is an organic whole setting with second limiting plate 682, and be provided with on the second handle 67 and supply second installation piece 681 to wear to establish the second shifting chute 690 that slides, and second shifting chute 690 is spacing mutually with second limiting plate 682, second pressure spring 687 bonds on second apron 680 through epoxy glue, and the other end of second pressure spring 687 contradicts with second limiting plate 682 and compresses tightly, second pressure spring 687 is used for ordering about second limiting plate 682 and keeps away from to the one side of keeping away from second handle 67, in order to realize reseing.
The second connecting seat 683 is integrally arranged on the second handle 67, and the second connecting seat 683 is hinged to the second transmission rod 684, and the second transmission rod 684 is controlled by one side of the second limiting plate 682 to be rotatably connected with the second movable wheel 685, so that the second movable wheel 685 is abutted against the second limiting plate 682, and the other end of the second transmission rod 684 is conveniently lifted to realize the lever effect. The second connecting rope 686 is used for connecting the second driving rod 684 with the locking bar 64, and a second movable groove 689 for the second connecting rope 686 to move is formed in the second cover plate 680. Once the second actuator rod 684 is raised, the second linking cord 686 is carried along, thereby raising the locking bar 64 out of the engaged position.

Claims (9)

1. The utility model provides a liquid nitrogen refrigeration low temperature tensile test device, includes tensile testing machine (1), its characterized in that: the tensile testing machine (1) is provided with mounting positions (101) for mounting the upper end and the lower end of a circular tube (100), the mounting positions (101) are in threaded fit with connectors (102) inserted into the circular tube (100), the connectors (102) are provided with connecting seats (103) for abutting and limiting the circular tube (100), and the connecting seats (103) are welded and fixed with the circular tube (100);
the tensile testing machine (1) is also provided with a cooling device (2) for clamping the round pipe (100), and the cooling device (2) comprises a box body (203), a heat insulation layer (205) arranged on the box body (203) and a fixing assembly (4) for fixing the heat insulation layer (205);
the fixing assembly (4) comprises:
the inserting block (400) is arranged on one side, close to the box body (203), of the heat-insulating layer (205) and is used for being inserted into the box body (203);
the inserting table (401) is arranged on one side, far away from the box body (203), of the inserting block (400) and is fixedly connected with the heat-insulating layer (205);
a connecting column (402) arranged on the box body (203);
the connecting piece (403) is inserted into and limited on the insert block (400) and is in threaded fit with the connecting column (402);
the connecting table (404) is arranged on one side of the connecting column (402) far away from the box body (203), has a diameter smaller than that of the connecting piece (403), and is inserted into the thread groove (418);
the elastic piece (405) is arranged on the connecting piece (403) and is positioned at the bottom of the thread groove (418);
the clamping ball (406) is arranged on one side, close to the connecting table (404), of the elastic sheet (405), and is clamped and fixed with the connecting table (404) after the connecting column (402) is in threaded fit with the connecting piece (403);
the fixing column (407) is arranged on the connecting piece (403);
the fixed pressure spring (408) is sleeved and clamped on the fixed column (407), one end of the fixed pressure spring (408) is sleeved and clamped on the fixed column (407), is positioned in the elastic sheet (405) and does not interfere with the elastic sheet (405), and the other end of the fixed pressure spring (408) is bonded with the first connecting piece (409) through glue;
the first connecting piece (409) is arranged on one side, far away from the fixed column (407), of the fixed pressure spring (408);
a bearing (410) provided on the connection table (404);
the second connecting piece (411) is arranged on the inner ring of the bearing (410) and is in abutting connection with the first connecting piece (409);
the first rotating protrusion (412) is arranged on one side, close to the second connecting piece (411), of the first connecting piece (409);
the second rotating bulge (413) is arranged on one side, close to the first connecting piece (409), of the second connecting piece (411) and is mutually limited with the first rotating bulge (412) when the connecting column (402) is in threaded fit with the connecting piece (403);
be provided with on heat preservation (205) and supply inserted block (400) to insert and spacing first slot (414), offer on box (203) and supply inserted block (400) male second slot (415), offer on heat preservation (205) and supply inserted platform (401) installation insertion groove (416), all offer on inserted block (400) and inserted platform (401) and supply connecting piece (403) male patchhole (417), be provided with on connecting piece (403) and supply spliced pole (402) screw-thread fit's thread groove (418), set up on connecting platform (404) and supply first annular (419) of joint ball (406) joint, it establishes groove (420) to be provided with the outer loop that supplies bearing (410) to inlay on connecting platform (404).
2. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 1, characterized in that: still be provided with heat sink (2) that are used for centre gripping pipe (100) on tensile test machine (1), heat sink (2) include:
a liquid nitrogen cylinder (200) placed on the ground and used for providing liquid nitrogen;
the connecting pipe (201) is arranged on the liquid nitrogen cylinder (200) and used for discharging liquid nitrogen;
the control valve (202) is arranged between the liquid nitrogen cylinder (200) and the connecting pipe (201) and is used for controlling the opening and closing of the liquid nitrogen cylinder (200);
the connecting bracket (3) is arranged on the tensile testing machine (1);
the box bodies (203) are arranged on the connecting support (3), are symmetrically hinged with each other, are used for the penetration installation of the circular tubes (100) and are used for providing a low-temperature environment;
the detection plate (204) is arranged on the box bodies (203) at two sides and is used for cooling the circular tube (100);
the heat preservation layer (205) is arranged between the box body (203) and the detection plate (204) and is used for preserving heat;
the fixing component (4) is arranged on the box body (203) and is used for fixing the heat-insulating layer (205);
the air inlet pipe (206) sequentially penetrates through the box body (203), the heat insulation layer (205) and the detection plate (204) and supplies liquid nitrogen to flow onto the circular pipe (100);
the gas outlet pipe (208) sequentially penetrates through the box body (203), the heat preservation layer (205) and the detection plate (204) and is used for allowing liquid nitrogen to flow out, and the gas outlet pipe and the gas inlet pipe (206) are arranged on the same detection plate (204);
the opening and closing assembly (6) is arranged on the box body (203) and is used for opening and closing the box body (203);
the recovery cylinder (209) is placed on the ground, and collects the liquid nitrogen flowing out of the gas outlet pipe (208);
a thermocouple sensor (210) disposed on a sensing plate (204) different from the outlet tube (208);
a circuit board (211) which is arranged on the box body (203) and is connected with the thermocouple sensor (210);
protective covers (212) arranged on two sides of the box body (203) and respectively used for covering the connecting pipe (201) and the circuit board (211);
the heat insulation layer (205) is provided with a first insertion hole (213) for inserting the air outlet pipe (208) and the air inlet pipe (206), the heat insulation layer (205) is provided with a second insertion hole (214) for installing the thermocouple sensor (210), and the box body (203) is provided with an installation cavity (215) for installing the heat insulation layer (205).
3. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 1, characterized in that: still be provided with locating component (5) on inserted block (400), be provided with location mounting groove (500) that supply locating component (5) to install on inserted block (400), be provided with locating hole (501) that supply locating component (5) location on box (203), locating component (5) include:
a positioning cylinder (502) arranged in the positioning installation groove (500);
the positioning ball (503) is limited and protrudes out of the positioning barrel (502) and is clamped in the positioning hole (501);
the positioning compression spring (504) is arranged on the positioning ball (503) and is arranged along the length direction of the positioning cylinder (502);
the positioning cover (505) is arranged on the positioning cylinder (502) and is fixedly connected with one end, far away from the positioning ball (503), of the positioning compression spring (504);
the first positioning magnetic block (506) is arranged on one side, close to the positioning compression spring (504), of the positioning cover (505);
the second positioning magnetic block (507) is arranged on one side, away from the positioning cover (505), of the positioning ball (503) and mutually repelled with the first positioning magnetic block (506);
the third positioning magnetic block (508) is arranged on one side of the box body (203) close to the positioning ball (503) and mutually attracts the second positioning magnetic block (507);
the positioning device is characterized in that a positioning installation cavity (509) for installing a positioning ball (503) and a positioning pressure spring (504) is formed in the positioning cylinder (502), a positioning limiting hole (510) for limiting and protruding the positioning ball (503) is formed in the positioning cylinder (502), a first limiting groove (511) for installing a first positioning magnetic block (506) is formed in the positioning cover (505), a second limiting groove (512) for installing a second positioning magnetic block (507) is formed in the positioning ball (503), and a third positioning groove (513) for installing a third positioning magnetic block (508) and communicating with the positioning hole (501) is formed in the box body (203).
4. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 2, characterized in that: a first magnet (700) is arranged on one side, close to the box body (203), of the heat insulation layer (205), and a first installation groove (701) for installing the first magnet (700) is further arranged on one side, close to the box body (203), of the heat insulation layer (205);
a second magnet (702) is arranged on one side, close to the heat insulation layer (205), of the box body (203), the first magnet (700) and the second magnet (702) are attracted with each other, a clamping cylinder (704) for mounting the second magnet (702) is arranged on the box body (203), a first placing groove (705) for inserting the clamping cylinder (704) is formed in the box body (203), a second placing groove (706) for mounting the second magnet (702) is formed in the clamping cylinder (704), a clamping block (707) is arranged on one side, far away from the first magnet (700), of the clamping cylinder (704), and a clamping groove (708) for clamping the clamping block (707) is formed in the box body (203);
a snap ring (709) is arranged on one side, close to the first magnet (700), of the clamping cylinder (704), and a second annular groove (710) for clamping the snap ring (709) is arranged on one side, close to the clamping cylinder (704), of the second magnet (702);
the clamping cylinder (704) is further provided with a sealing cover (711) used for covering the second magnet (702), the clamping cylinder (704) is provided with a sealing groove (712) for covering the sealing cover (711), the sealing cover (711) is provided with a positioning column (713), and the clamping cylinder (704) is provided with a positioning groove (714) for inserting the positioning column (713) into the clamping.
5. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 2, characterized in that: the opening and closing assembly (6) comprises:
the buckle seat (60) is arranged on one side of the box body (203) far away from the pin joint;
the lock seat (61) is arranged on one side of the box body (203) far away from the pin joint, and is positioned on a different box body (203) from the buckle seat (60);
the breaking-off block (62) is hinged on the lock seat (61);
the connecting piece (63) is hinged to one side of the snapping block (62) far away from the lock seat (61);
the locking strip (64) is arranged on one side of the connecting sheet (63) far away from the lock seat (61) and is connected and buckled with the buckling seat (60);
the first handle (65) is arranged on one side, far away from the hinge joint, of the box body (203);
the first lifting assembly (66) is arranged on the first handle (65) and is used for lifting the breaking-off block (62) to separate the lock strip (64) from the buckle seat (60);
the second handle (67) is arranged on one side, far away from the hinge joint, of the box body (203), and is positioned on a different box body (203) from the first handle (65);
and the second lifting assembly (68) is arranged on the second handle (67) and is used for lifting the locking strip (64) to be separated from the buckle seat (60).
6. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 5, characterized in that: the first lift assembly (66) includes:
the first cover plate (660) is connected to one side, close to the box body (203), of the first handle (65) in a sliding mode;
the first mounting block (661) is connected to the first cover plate (660) in a sliding manner;
the first limiting plate (662) is arranged on one side, close to the first handle (65), of the first mounting block (661), and is limited with the first cover plate (660);
the first transmission rod (663) is arranged on one side, away from the first mounting block (661), of the first limiting plate (662) and moves synchronously with the first limiting plate (662);
the first pressure spring (664) is arranged on the first handle (65), the other end of the first pressure spring is pressed against the first limit plate (662) and/or the first transmission rod (663), and the first pressure spring is used for driving the first limit plate (662) and the first transmission rod (663) to be far away from one side far away from the first handle (65);
the first connecting seat (665) is arranged on one side of the breaking-off block (62) far away from the box body (203);
the first connecting rod (666) is used for hinging the first connecting seat (665) and the first transmission rod (663);
the first tension spring (667) is arranged between the first connecting rod (666) and the first handle (65) and is used for driving the first connecting rod (666) to approach towards the direction of the first handle (65);
a first sliding groove (668) for a first cover plate (660) to be installed in a sliding mode is formed in the first handle (65), a first movable groove (669) for a first connecting rod (666) to move is formed in the first cover plate (660), and a first moving groove (670) for a first installing block (661) to slide and for a first limiting plate (662) to limit mutually is formed in the first cover plate (660);
the first pressure spring (664) pushes the first mounting block (661) to one side away from the first handle (65) for resetting, the first limiting plate (662) and the first cover plate (660) are limited mutually, and the first transmission rod (663) is connected with the first handle (65) through the first tension spring (667).
7. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 6, characterized in that: the second lift assembly (68) comprising:
the second cover plate (680) is connected to one side, close to the box body (203), of the second handle (67) in a sliding mode;
a second mounting block (681) slidably coupled to the second handle (67);
the second limiting plate (682) is arranged on one side, close to the second cover plate (680), of the second mounting block (681) and is mutually limited with the second handle (67);
a second connecting seat (683) arranged on the second handle (67);
the second transmission rod (684) is hinged to the second connecting seat (683), and one end of the second transmission rod is controlled by a second limiting plate (682);
the second movable wheel (685) is rotatably connected to one side, close to the second limiting plate (682), of the second transmission rod (684) and is in interference connection with the second limiting plate (682);
the second connecting rope (686) is used for connecting one side, far away from the second limit plate (682), of the second transmission rod (684) and the lock bar (64);
the second pressure spring (687) is arranged on the second cover plate (680), the other end of the second pressure spring is abutted against the second limiting plate (682) to be pressed, and the second pressure spring is used for driving the second limiting plate (682) to be far away from one side far away from the second handle (67);
be provided with on second handle (67) and supply second apron (680) the second groove (688) that slides of installation, be provided with on second apron (680) and supply the second to connect second activity groove (689) of rope (686) activity, be provided with on second handle (67) and supply second installation piece (681) to slide and with second limiting plate (682) spacing second shifting groove (690) each other.
8. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 5, characterized in that: the connecting piece (63) comprises a rotating plate (800) pivoted with the breaking-off block (62), a locking plate (801) used for fixing the locking bar (64) and a locking tension spring (802);
the locking tension spring (802) drives the rotating plate (800) and the locking plate (801) to be close to each other, the locking tension spring (802) is sleeved on the rotating plate (800) and the locking plate (801), one end of the locking tension spring (802) is fixed with the rotating plate (800), and the other end of the locking tension spring (802) is fixed with the locking plate (801);
a sliding block (803) is arranged on the rotating plate (800), a sliding groove (804) for the sliding block (803) to slide along the length direction of the locking plate (801) is formed in the locking plate (801), a cover block (805) used for fixing the rotating plate (800) to the locking plate (801) is arranged on the sliding block (803), the cover block (805) is connected with the locking plate (801) in a sliding mode, handle seats (806) are arranged on the first handle (65) and the second handle (67), and handle grooves (807) for mounting the handle seats (806) are formed in the box body (203);
a clamping hook (808) is arranged on one side, close to the box body (203), of the handle seat (806), an embedding groove (809) for the clamping hook (808) to insert is formed in the box body (203), and a clamping groove (810) which is used for the clamping hook (808) to slide and fix and is communicated with the embedding groove (809) is formed in the box body (203);
the grab (808) is also provided with a rotating column (811), the handle seat (806) is provided with a rotating groove (812) for the rotating column (811) to penetrate through for rotation, a rotating disc (813) is coaxially arranged on one side of the rotating column (811) far away from the box body (203), and the rotating disc (813) is limited on one side of the handle seat (806) far away from the box body (203);
a rotating groove (814) for the clamping hook (808) to be rotationally clamped is formed in the box body (203), a plurality of rotating columns (815) are arranged on the rotating disc (813), and rotating holes (816) for the rotating columns (811) to be inserted are formed in the rotating columns (815);
the side of the rotating disc (813) far away from the handle seat (806) is also provided with a holding block (817) for holding by a hand to operate the rotating disc (813), and the handle seat (806) is also provided with an indicating block (818) for indicating the rotating and locking direction of the hook (808).
9. The liquid nitrogen refrigeration low-temperature tensile test device according to claim 2, characterized in that: the tensile testing machine (1) is further provided with a containing box (306) for containing liquid nitrogen, the box body (203) is provided with a hinge piece (307), the box bodies (203) on two sides are connected through the hinge piece (307), the hinge piece (307) is further provided with a threaded rod (308) for connecting the hinge piece (307) in a penetrating manner and a locking nut (309) for locking the threaded rod (308);
the connecting bracket (3) comprises:
a connection ring (300) provided on the mounting rod (104);
the connecting frame (301) is arranged on the mounting rod (104) and is matched and locked with the connecting ring (300);
the first connecting rods (302) are arranged on the connecting frames (301) and are used for connecting the connecting frames (301) on the two sides;
the first connecting transverse frame (303) is rotatably connected to the first connecting rod (302) and is positioned between the connecting frames (301) at the two sides;
the second connecting rod (304) is arranged on one side of the first connecting frame (301) far away from the first connecting rod (302);
the second connecting cross frame (305) is rotatably connected to the second connecting rod (304) and is abutted against the first connecting cross frame (303), one side of the second connecting rod (304) is far away from the second connecting rod, a threaded rod (308) penetrates through the second connecting rod, and the second connecting rod is abutted against the hinge piece (307) for limiting so as to realize support.
CN202011629192.4A 2020-12-31 2020-12-31 Liquid nitrogen refrigeration low temperature tensile test device Active CN112834362B (en)

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CN114279781B (en) * 2021-12-07 2024-02-09 上海卫星装备研究所 Preparation device and preparation method of groove type heat pipe mechanical tensile sample

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