CN115389326B - Heat exchange tube pressure testing tool with angle adjusting function - Google Patents
Heat exchange tube pressure testing tool with angle adjusting function Download PDFInfo
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- CN115389326B CN115389326B CN202211031135.5A CN202211031135A CN115389326B CN 115389326 B CN115389326 B CN 115389326B CN 202211031135 A CN202211031135 A CN 202211031135A CN 115389326 B CN115389326 B CN 115389326B
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- heat exchange
- exchange tube
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- 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
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of heat exchange tube pressure test tools, in particular to a heat exchange tube pressure test tool with an angle adjusting function. According to the invention, through the design of the angle adjusting mechanism, the output end of the annular sliding groove drives the driving gear to rotate and drives the angle adjusting chassis meshed with the driving gear to rotate, so that the angle adjusting chassis can drive the pressure testing tool mechanism to integrally rotate and adjust to a proper angle, the angle adjusting mechanism can realize the multi-azimuth angle adjusting function, and can be adjusted according to individual differences of the heat exchange tubes, thereby being beneficial to ensuring uniform stress in the pressure testing process of different positions of the heat exchange tubes, keeping the stability of the heat exchange tubes and being beneficial to pressure testing operation.
Description
Technical Field
The invention relates to the technical field of heat exchange tube pressure test tools, in particular to a heat exchange tube pressure test tool with an angle adjusting function.
Background
The heat exchange tube is one of the elements of the heat exchanger, and because of its high thermal conductivity and good isothermicity, it is often placed in the cylinder for heat exchange between two media during use, and because of the possibility of steam, water, steam-water mixture, and corrosive media in the heat exchange tube, the use conditions are diversified, and in order to better apply the heat exchange tube to the production conditions, it is required that the professional manufacturer of the heat exchange tube performs a series of tests, such as air pressure test and water pressure test, before shipping.
At present, the heat exchange tube is used as a main compression element, and pressure test is required after production and manufacture, but because the heat exchange tube has various forms and specifications, such as an L-shaped bent tube, a straight tube and the like, and the pressure test tool can only clamp the heat exchange tube with a single model, different pressure test tools are required to be respectively arranged aiming at different forms and specifications of the heat exchange tube in order to meet different engineering requirements, so that the cost of the pressure test tool is too high, and the use flexibility of the pressure test tool is poor.
In addition, in the pressure test process of the heat exchange tube, most of heat exchange tube pressure test tools are manually placed transversely or vertically, the placing angle is single, the pressure test force of the heat exchange tube is uneven due to the lack of an adjusting function, and therefore the heat exchange tube pressure test tool with the angle adjusting function is provided for solving the problem.
Disclosure of Invention
The invention aims to provide a heat exchange tube pressure test tool with an angle adjusting function, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a heat exchange tube pressure testing frock with angle modulation function, includes the main mounting frame body, heat exchange tube pressure testing machine main part is installed to main mounting frame body's top one side, and main mounting frame body surface position department of the below of heat exchange tube pressure testing machine main part is provided with angle modulation mechanism, pressure testing frock mechanism is installed at angle modulation mechanism's top.
Further, angle adjustment mechanism is including angle adjustment chassis, and the intermediate position department cover on angle adjustment chassis is equipped with the assembly center pin of rotation to the assembly center pin of rotation is established with main mounting bracket body surface cover and is connected, the position department meshing of angle adjustment chassis one side has the driving gear, and the driving gear passes through the bearing and install on main mounting bracket body surface, the annular sliding tray that provides power supply is installed to the bottom of driving gear, drives the driving gear through annular sliding tray output and rotates, makes it drive the angle adjustment chassis of meshing with it and carries out synchronous rotation, thereby can realize that the pressure testing frock mechanism that angle adjustment chassis top is connected wholly rotates, makes it can drive the heat exchange tube and adjusts suitable angle, conveniently carries out the pressure testing operation to its heat exchange tube, and then is favorable to making the heat exchange tube atress even, and has the angle adjustment function.
Further, the bottom surface on angle adjustment chassis is provided with the slip ball, servo motor has been seted up on the surface of the main mounting bracket body, the slip ball is embedded in servo motor and servo motor sliding connection, and when the angle adjustment chassis rotated, the slip ball of its angle adjustment chassis bottom can carry out synchronous rotation in servo motor, strengthens its stability when the angle adjustment chassis is rotatory.
Further, the pointer is installed to the position department of angle modulation chassis surface one side, the main mounting frame body surface position department in the angle modulation chassis outside all is provided with the scale mark, in the rotatory angle adjustment in-process of angle modulation chassis, can observe the scale mark position that angle modulation chassis one side pointer pointed, makes things convenient for the workman to know at any time and rotates specific angle, strengthens the accuracy of angle adjustment.
Further, pressure testing frock mechanism is including first heat exchange tube standing groove, second heat exchange tube standing groove and regulation rotatory threaded rod, and first heat exchange tube standing groove and second heat exchange tube standing groove are installed on the angle modulation chassis surface, first heat exchange tube standing groove and second heat exchange tube standing groove are cross overall arrangement, the both ends of first heat exchange tube standing groove and second heat exchange tube standing groove sliding connection respectively have centre gripping mounting fixture, the one end of regulation rotatory threaded rod all runs through one side of first heat exchange tube standing groove and second heat exchange tube standing groove to be connected with centre gripping mounting fixture through the bearing, through the cross overall arrangement between first heat exchange tube standing groove and the second heat exchange tube standing groove, make it can realize the L type curved heat exchange tube with different specifications, perhaps straight heat exchange tube put into in first heat exchange tube standing groove and the second heat exchange tube standing groove and block to can carry out the centre gripping with it fixedly, thereby can realize the convenience to carry out the pressure testing operation to the heat exchange tube of its different specifications, avoid setting up pressure testing frock's cost for the pipeline of different diameters respectively.
Further, the surface transverse press fit of centre gripping mounting fixture has the bar rubber pad, and the even equidistance of bar rubber pad distributes on the surface of centre gripping mounting fixture inner wall, and its bar rubber pad mainly adopts the main material to foam and forms for natural latex raw materials, has elasticity extremely good, the resilience is good, the rubber characteristic that can not warp to make rotatory regulation rotatory threaded rod drive the centre gripping mounting fixture have certain resilience to its contact surface with the heat exchange tube clamp is fixed between, play the cushioning effect, reducible because the too big circumstances that causes the heat exchange tube surface of extrusion force of centre gripping mounting fixture.
Further, the inner wall both sides of first heat exchange tube standing groove and second heat exchange tube standing groove are provided with respectively and move the slider, the outer wall of centre gripping mounting fixture has seted up the spout with move slider looks adaptation, move the slider and inlay in the spout and slide between sliding connection, when the pressure testing frock carries out the centre gripping to its heat exchange tube fixed, the accessible is handheld to be fixed the anchor clamps and makes its spout along moving slider lateral shifting, makes it can be according to different length and the diameter of heat exchange tube, adjusts the suitable interval between the anchor clamps of centre gripping, and the heat exchange tube of different specifications of centre gripping, and then effectively improves the flexibility of adjusting to and the commonality.
Further, the side moves the slider and sets up to protruding font piece, the spout in centre gripping mounting fixture outside sets up the protruding word shape groove with side slider looks adaptation, and the inner wall pressfitting in protruding word shape groove has the gasket, use in protruding word shape groove and protruding font piece's cooperation, it is unfavorable to drop after making its embedding, and the gasket then is as the little part of side friction between slider and the spout, in order to avoid moving slider and the spout damage, consequently select to use the gasket to cut off, can not only play the loss effect of reduction part simultaneously, can increase the fastening degree between the two simultaneously as required, stability when strengthening its removal.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, through the design of the pressure test fixture mechanism, the first heat exchange tube placing groove and the second heat exchange tube placing groove which are in cross arrangement can realize that L-shaped bent heat exchange tubes with different specifications or straight heat exchange tubes are placed into the pressure test fixture mechanism to be clamped, and the clamping fixture is used for transversely moving in the side moving sliding block, and the clamping fixture is adjusted by rotating and adjusting the rotating threaded rod to adjust the proper distance between the clamping fixtures to clamp and fix the two ends of the heat exchange tubes, so that the heat exchange tubes with different diameters can be clamped, and further, the operation of using different pressure test fixtures for the heat exchange tubes with different specifications can be avoided, the cost of the pressure test fixture is reduced, the flexibility of the pressure test fixture in use is improved, meanwhile, the heat exchange tube is conveniently replaced, the heat exchange tube is not easy to incline when the pressure test fixture mechanism is used for pressure test, and the stability of the heat exchange tube is kept.
Through angle adjustment mechanism's design, make its annular sliding tray output drive the driving gear rotation to drive the angle modulation chassis with it meshing rotate, thereby make its angle modulation chassis can drive the whole rotation of pressure testing frock mechanism, and adjust to suitable angle, make it can realize the diversified adjustment function of angle, can adjust according to the individual difference of heat exchange tube, and then be favorable to making the pressure testing in-process of heat exchange tube different positions atress even, be favorable to the pressure testing operation.
Description of the drawings:
in order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of the structure of the present invention;
FIG. 2 is a schematic perspective view of a pressure test structure of an L-shaped bent pipe;
FIG. 3 is a schematic perspective view of a straight tube pressure test structure of the present invention;
FIG. 4 is a schematic structural perspective view of the pressure test tooling mechanism of the present invention;
FIG. 5 is a perspective view showing the angular adjustment mechanism of the present invention in a disassembled configuration;
fig. 6 is a partial perspective view showing the structure of the angle adjusting mechanism of the present invention.
In the figure: 1. a main mounting frame body; 2. a heat exchange tube pressure testing main body; 3. an angle adjusting mechanism; 31. an angle adjusting chassis; 32. assembling a rotation center shaft; 33. a drive gear; 34. an annular sliding groove; 35. a servo motor; 36. a sliding ball; 4. a pressure test tooling mechanism; 41. a first heat exchange tube placement groove; 42. a second heat exchange tube placement groove; 43. clamping and fixing the clamp; 44. adjusting a rotary threaded rod; 45. and (3) laterally moving the sliding block.
The specific embodiment is as follows:
the following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1-4, one embodiment provided by the present invention is: the utility model provides a heat exchange tube pressure test frock with angle regulation function, including main mounting frame body 1, main mounting frame body 1's top one side installs heat exchange tube pressure test machine main part 2, and main mounting frame body 1 surface position department of heat exchange tube pressure test machine main part 2 below is provided with angle adjustment mechanism 3, angle adjustment mechanism 3 is including angle adjustment chassis 31, and angle adjustment chassis 31's intermediate position department cover is equipped with assembly rotation center pin 32, and assembly rotation center pin 32 is connected with main mounting frame body 1 surface cover, angle adjustment chassis 31 surface one side's position department installs the pointer, angle adjustment chassis 31 outside main mounting frame body 1 surface position department all is provided with the scale mark, angle adjustment chassis 31 one side's position department meshing has driving gear 33, and driving gear 33 passes through the bearing and install in main mounting frame body 1 surface, the annular sliding groove 34 of providing power source is installed to the bottom surface of angle adjustment chassis 31, servo motor 35 has been seted up on the surface of main mounting frame body 1, sliding ball 36 is embedded in servo motor 35 and servo motor 35 sliding connection;
before the heat exchange tubes are prepared for pressure test, the heat exchange tubes are clamped into the first heat exchange tube placing groove 41 and the second heat exchange tube placing groove 42 according to the specifications of the heat exchange tubes, the clamping fixing clamps 43 at the two ends of the first heat exchange tube placing groove 41 or the second heat exchange tube placing groove 42 are held by hands, the heat exchange tubes transversely move along the side moving sliding blocks 45 through the sliding grooves, each group of clamping fixing clamps 43 are adjusted to be respectively positioned at the two ends of the heat exchange tubes, and then the clamping fixing clamps 43 are driven to approach the heat exchange tubes and are extruded and fixed by holding the rotating threaded rods 44, so that the heat exchange tubes with different specifications can be fixedly clamped, the next pressure test operation of the heat exchange tubes is facilitated, and the heat exchange tubes can be kept in a stable state in the pressure test process;
embodiment two:
referring to fig. 5 to 6, the second embodiment differs from the first embodiment in that: the top of the angle adjusting mechanism 3 is provided with a pressure testing tool mechanism 4, the pressure testing tool mechanism 4 comprises a first heat exchange tube placing groove 41, a second heat exchange tube placing groove 42 and an adjusting rotary threaded rod 44, the first heat exchange tube placing groove 41 and the second heat exchange tube placing groove 42 are arranged on the surface of the angle adjusting chassis 31, the first heat exchange tube placing groove 41 and the second heat exchange tube placing groove 42 are in a cross layout, two ends of the first heat exchange tube placing groove 41 and the second heat exchange tube placing groove 42 are respectively connected with a clamping fixing clamp 43 in a sliding manner, one end of the adjusting rotary threaded rod 44 penetrates through one side of the first heat exchange tube placing groove 41 and one side of the second heat exchange tube placing groove 42 and is connected with the clamping fixing clamp 43 through a bearing, a strip rubber pad is transversely pressed on the surface of the clamping fixing clamp 43, the strip rubber pad is uniformly distributed on the surface of the inner wall of the clamping fixing clamp 43 at equal distance, side moving sliding blocks 45 are respectively arranged on two sides of the inner wall of the first heat exchange tube placing groove 41 and the second heat exchange tube placing groove 42, sliding blocks 45 are arranged on the outer walls of the clamping fixing clamp 43, sliding blocks 45 are matched with the side moving blocks, the side moving blocks 45 are arranged in the sliding grooves are matched with the sliding grooves, the sliding blocks are arranged between the sliding blocks and the sliding blocks 45 are matched with the sliding grooves, the sliding blocks are arranged on the inner side, and the inner side of the side sliding blocks 45 are matched with the inner side sliding blocks, and the side 45 is matched with the side with the inner side with the sliding blocks, and the side 45 is arranged on the side 45;
when the heat exchange tube pressure test device is ready to test the pressure of the heat exchange tube, the opening device works through the external control button, at this moment, the annular sliding groove 34 will normally work, the output end of the annular sliding groove 34 drives the driving gear 33 to start to rotate uniformly, so that the driving gear 33 drives the angle adjustment chassis 31 meshed with the driving gear 33 to start to rotate, the angle adjustment chassis 31 can slide annularly along the servo motor 35 through the sliding ball 36, and drives the pressure test tool mechanism 4 of the heat exchange tube assembled at the top of the angle adjustment chassis 31 to rotate integrally, after the heat exchange tube on the pressure test tool mechanism 4 is adjusted to a proper angle position, the annular sliding groove 34 is closed to work, and the heat exchange tube pressure test body 2 is opened, so that the heat exchange tube pressure test body 2 of the heat exchange tube is pressed down to test the pressure, after the pressure test on one side of the heat exchange tube is finished, the heat exchange tube can be adjusted again as described above, the angle adjustment of other directions is performed on the heat exchange tube again, the heat exchange tube can be conveniently adjusted according to individual differences of the heat exchange tubes, the pressure test tube can be adjusted in multiple directions, the pressure test process is facilitated, the heat exchange tube pressure test device can be adjusted in multiple directions, and the pressure test device can be adjusted in different positions, and the heat exchange tube pressure test device can be adjusted in different places.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. Heat exchange tube pressure testing frock with angle modulation function, including main mounting bracket body (1), its characterized in that: the heat exchange tube pressure testing machine comprises a main mounting frame body (1), wherein a heat exchange tube pressure testing machine main body (2) is mounted on one side of the top of the main mounting frame body (1), an angle adjusting mechanism (3) is arranged at the surface position of the main mounting frame body (1) below the heat exchange tube pressure testing machine main body (2), and a pressure testing tool mechanism (4) is mounted on the top of the angle adjusting mechanism (3);
the angle adjusting mechanism (3) comprises an angle adjusting chassis (31), an assembling rotation center shaft (32) is sleeved at the middle position of the angle adjusting chassis (31), the assembling rotation center shaft (32) is sleeved and connected with the surface of the main mounting frame body (1), a driving gear (33) is meshed at the position of one side of the angle adjusting chassis (31), the driving gear (33) is mounted on the surface of the main mounting frame body (1) through a bearing, and an annular sliding groove (34) for providing a power source is mounted at the bottom of the driving gear (33);
the bottom surface of the angle adjusting chassis (31) is provided with a sliding ball (36), the surface of the main mounting frame body (1) is provided with a servo motor (35), and the sliding ball (36) is embedded in the servo motor (35) and is in sliding connection with the servo motor (35);
a pointer is arranged at the position of one side of the surface of the angle adjusting chassis (31), and scale marks are arranged at the position of the surface of the main mounting frame body (1) at the outer side of the angle adjusting chassis (31);
pressure testing frock mechanism (4) is including first heat exchange tube standing groove (41), second heat exchange tube standing groove (42) and regulation rotatory threaded rod (44), and first heat exchange tube standing groove (41) and second heat exchange tube standing groove (42) are installed on angle adjustment chassis (31) surface, first heat exchange tube standing groove (41) and second heat exchange tube standing groove (42) are cross overall arrangement, the both ends of first heat exchange tube standing groove (41) and second heat exchange tube standing groove (42) sliding connection respectively have centre gripping mounting fixture (43), the one end of regulation rotatory threaded rod (44) all runs through one side of first heat exchange tube standing groove (41) and second heat exchange tube standing groove (42) to be connected with centre gripping mounting fixture (43) through the bearing.
2. The heat exchange tube pressure test tool with the angle adjusting function according to claim 1, wherein: the surface of the clamping and fixing clamp (43) is transversely pressed with strip-shaped rubber pads, and the strip-shaped rubber pads are uniformly distributed on the surface of the inner wall of the clamping and fixing clamp (43) at equal intervals.
3. The heat exchange tube pressure test tool with the angle adjusting function according to claim 1, wherein: the side-shifting sliding blocks (45) are respectively arranged on two sides of the inner wall of the first heat exchange tube placing groove (41) and two sides of the inner wall of the second heat exchange tube placing groove (42), sliding grooves matched with the side-shifting sliding blocks (45) are formed in the outer wall of the clamping fixing clamp (43), and the side-shifting sliding blocks (45) are embedded in the sliding grooves and are in sliding connection with the sliding grooves.
4. The heat exchange tube pressure test tool with the angle adjusting function according to claim 3, wherein: the side-moving sliding block (45) is arranged to be a convex-shaped block, a sliding groove arranged on the outer side of the clamping and fixing clamp (43) is matched with the side-moving sliding block (45), and a gasket is pressed on the inner wall of the convex-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211031135.5A CN115389326B (en) | 2022-08-26 | 2022-08-26 | Heat exchange tube pressure testing tool with angle adjusting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211031135.5A CN115389326B (en) | 2022-08-26 | 2022-08-26 | Heat exchange tube pressure testing tool with angle adjusting function |
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| Publication Number | Publication Date |
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| CN115389326A CN115389326A (en) | 2022-11-25 |
| CN115389326B true CN115389326B (en) | 2023-08-25 |
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| CN216899905U (en) * | 2022-02-08 | 2022-07-05 | 青岛昌鑫晟建材科技有限公司 | Concrete resistance to compression appearance |
| CN114152518A (en) * | 2022-02-09 | 2022-03-08 | 北京锦东建设发展有限公司 | Pipe detection device |
| CN116008054A (en) * | 2022-12-06 | 2023-04-25 | 江苏全路程新能源科技有限公司 | Testing device for power battery of new energy automobile |
| CN115931546A (en) * | 2022-12-29 | 2023-04-07 | 中南大学 | Variable angle becomes high-speed impact test anchor clamps on impact point and stable boundary |
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| CN115389326A (en) | 2022-11-25 |
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