CN203587441U - Electro-hydraulic servo horizontal tension tester - Google Patents
Electro-hydraulic servo horizontal tension tester Download PDFInfo
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- CN203587441U CN203587441U CN201320737018.0U CN201320737018U CN203587441U CN 203587441 U CN203587441 U CN 203587441U CN 201320737018 U CN201320737018 U CN 201320737018U CN 203587441 U CN203587441 U CN 203587441U
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- oil cylinder
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- guide rail
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- 238000009864 tensile test Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 22
- 238000006073 displacement reaction Methods 0.000 description 6
- 210000000080 chela (arthropods) Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000012211 strain insulator Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to an electro-hydraulic servo horizontal tension tester which is characterized by comprising a force bearing frame, a counterforce frame assembly (7), a movable tailstock vehicle body (6), a jaw clamp (8) and a servo oil source, wherein the force bearing frame comprises two symmetric guide rails (1) which are in parallel, an oil cylinder base (2) and a bracket (3); bolt locating holes are formed in the guide rail (1), the movable tailstock vehicle body (6) slides along the guide rails (1) and fixed in the bolt locating holes, the oil cylinder base (2) is connected with the guide rails (1) at two sides through bolts, the counterforce frame assembly (7) is arranged in a middle hole of the oil cylinder base so that a force carrying frame is formed, the bracket (3) is arranged below the guide rails (1), the jaw clamp (8) is arranged in the movable tailstock vehicle body (6), the counterforce frame assembly (7) comprises a higher-power oil cylinder piston, and the movable tailstock vehicle body (6) comprises a lower-power oil cylinder piston.
Description
Technical field
The utility model relates to a kind of tension tester, specifically, is a kind of electro-hydraulic servo horizontal tensile testing machine, belongs to tensile test technical field.
Background technology
At present, horizontal pulling force type generally, take single power value as main, only detects the tensile strength of optical cable, cable, bar, sheet material, does not possess after sample prestretched, its assorted golden tool is carried out to the ability of handgrip exercise, embody trial stretch and exist the shortcoming of limitation, poor compatibility.And in the test preparatory stage, sample disconnectable connection, all needs manually, testing crew working strength is large, complex operation step, and automaticity is low.
Summary of the invention
The utility model technical issues that need to address are: the horizontal puller system of prior art, do not possess after sample prestretched, and its assorted golden tool is carried out to the ability of handgrip exercise, embody trial stretch and exist the shortcoming of limitation, poor compatibility; Sample handling all need manually, and testing crew working strength is large, complex operation step, and automaticity is low.
The utility model is taked following technical scheme:
A kind of electro-hydraulic servo horizontal tensile testing machine, comprises load-bearing frame, reaction frame assembly 7, mobile tailstock car body 6, jaw clamp 8, servo oil sources; Described load-bearing frame comprises guide rail 1, the oil cylinder seat 2 of two Parallel Symmetrics, support 3, and described guide rail 1 is provided with fastening hole, and described mobile tailstock car body 6 slides and is fixed in fastening hole along guide rail 1; Described oil cylinder seat 2 is bolted two side rails 1, and reaction frame assembly 7 is installed in its interstitial hole, composition stress frame; Described support 3 is arranged on guide rail 1 below; Described jaw clamp 8 is arranged in mobile tailstock car body 6; Described reaction frame assembly 7 comprises larger actuator cylinder piston, and described mobile tailstock car body 6 comprises smaller power oil cylinder piston.
The feature of the technical program is: in mobile tailstock car body, be provided with actuator cylinder piston, can realize assorted golden tool is carried out to handgrip exercise, complete function, simultaneously, adopt guide rail, fastening hole to realize location automatically and adjust, reduced experimenter's working strength, improved automaticity.
Further, fix two pressing plates 4 on every pack support 3, pressing plate 4 is fixed on built-in fitting 5, and built-in fitting 5 casts in ground.
Further, described reaction frame assembly 7 comprises left side car body 701, load sensor 702, bulb pair 703,2000kN oil cylinder piston 704, connects thick stick 705, left jaw car body 706, left jaw oil sources 707; Described left side car body 701 is weldment, load sensor 702 is fixed on car body, bulb pair 703 is fixed on load sensor, by secondary bulb, be connected with 2000kN oil cylinder piston 704, two connect thick stick 705, left side car body 701 and left jaw car body 706 are coupled together, and left jaw oil sources 707 is fixed in left jaw car body 706 belows.
Further, described mobile tailstock car body 6 comprises right jaw car body 601,20kN oil cylinder piston 602, bulb pair 603, load sensor 604, connecting plate 605, whippletree 606,20kN handgrip exercise beam 607, guide rail fastening screw 608, car body drive unit 609, right jaw oil sources electric cabinet 610;
Further, described right jaw car body 601 is for iron casting and 20kN oil cylinder piston are connected and fixed, and bulb pair 603 is fixed on piston rod, and load sensor 604 is connected with bulb secondary 603, and connecting plate 605 and load cell 604 are fixed;
Further, by two whippletrees 606,20kN handgrip exercise beam 607 and connecting plate 605 are coupled together.Described guide rail fastening screw 608 is arranged in right jaw car body 601, by hydraulic-driven, completes that latch stretches out, fallback action; Car body drive unit 609 and right jaw oil sources electric cabinet 610 are all fixed on right jaw car body 601 belows.
Further, described jaw clamp comprises valve piston 801, draw back plate 802, liner plate 803, fixture block 804; Described valve piston 801 is arranged on respectively in left and right jaw car body, and draw back plate 802 is connected with valve piston 801, and liner plate 803 is put into left and right jaw car body, and draw back plate 802 embeds in liner plate 803 groovings.
The beneficial effects of the utility model are:
1, adopt the microcomputer controlled electro-hydraulic servo horizontal tensile testing machine can be according to rate of loading and the loading procedure of standard regulation, do the disrumpent feelings and slippage test of sample.
2, adopt computer control, have power, displacement automatic tracing and measuring function, permanent load stretches, and load keeps, the speed controls such as displacement, the speed controls such as test force.Software interface has the functions such as the dynamic demonstration of load, rate of loading, displacement, time and trial curve.
3, automaticity is high, the moving left and right of mobile tailstock car body, the plug of guide rail fastening screw, the degree of tightness of left and right pincers fixture all can complete by hand control box or microcomputer control, compare and need the type that manually completes in the past, greatly saved and tested required setup time, reduce the working strength of testing crew, there are higher safety and reliability.
4, there is the ability of assorted golden tool being carried out to handgrip exercise
Accompanying drawing explanation
Fig. 1 is the complete machine structure schematic diagram of electro-hydraulic servo horizontal tensile testing machine of the present utility model;
Fig. 2 is oil cylinder and the reaction frame assembly schematic diagram of electro-hydraulic servo horizontal tensile testing machine of the present utility model;
Fig. 3 is the mobile tailstock car body schematic diagram of electro-hydraulic servo horizontal tensile testing machine of the present utility model
Fig. 4 is the jaw clamp schematic diagram of electro-hydraulic servo horizontal tensile testing machine of the present utility model
Fig. 5 is the servo oil sources schematic diagram of the 2000kN of electro-hydraulic servo horizontal tensile testing machine of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is further illustrated.
Referring to Fig. 1, microcomputer controlled electro-hydraulic servo horizontal tensile testing machine, comprises load-bearing frame, reaction frame assembly 7, mobile tailstock car body 6, jaw clamp 8; Described load-bearing frame comprises guide rail 1, oil cylinder seat 2, support 3, pressing plate 4, built-in fitting 5.
Described load-bearing frame is horizontal, is fixed symmetric offset spread by array welding guide rail 1 by high-strength bolt.On guide rail, leave fastening hole, for fixing mobile tailstock car body 6.In guide rail inner side, process two tracks, by finishing, realize the smooth and easy movement in orbit of mobile tailstock car body 6.Oil cylinder seat 2 is also weldment, is bolted, and two side rails are coupled together, and oil cylinder and reaction frame assembly 7 are installed in interstitial hole, composition stress frame.Guide rail below linking number pack support 3, lifts load-bearing frame, leaves certain height of putting to jaw oil sources.On every pack support, fix two pressing plates 4, then pressing plate is fixed on built-in fitting 5, built-in fitting casts in ground.During test, this structure allows support to make draw direction play, avoided foot bolt directly and support fastening, the shearing force of generation is cut off the situation of bolt.
Described jaw clamp 8 is arranged in mobile tailstock car body 6.
Referring to Fig. 2, described oil cylinder and reaction frame assembly 7 comprise left side car body 701, load sensor 702, bulb pair 703,2000kN oil cylinder piston 704, connect thick stick 705, left jaw car body 706, left jaw oil sources 707; Described left side car body 701 is weldment, and load sensor 702 is fixed on car body, bulb pair 703 is fixed on load sensor, then is connected with 2000kN oil cylinder piston 704 secondary bulb.By two whippletrees 705, left side car body 701 and left jaw car body 706 are coupled together.The fixing left jaw oil sources 707 in jaw car body below.Between piston and sensor, by bulb is secondary, is connected, thereby realization is in tension test, guarantees center line and the testing machine stretching axis coaxle of left and right pincers, prevents that sample is subject to the impact of side force, has guaranteed the accuracy of test figure, and improves product serviceable life.
Referring to Fig. 3, described mobile tailstock car body 6 comprises right jaw car body 601,20kN oil cylinder piston 602, bulb pair 603, load sensor 604, connecting plate, 605, whippletree 606,20kN handgrip exercise beam 607, guide rail fastening screw 608, car body drive unit 609, right jaw oil sources electric cabinet 610;
Described right jaw car body 601 is iron casting, 20kN oil cylinder piston 602 is fixed on car body, bulb pair 603 is fixed on piston rod, load sensor 604 is connected in bulb is secondary, connecting plate 605 and sensor are fixed, by two whippletrees 606,20kN handgrip exercise beam 607 and connecting plate 605 are coupled together, composition stress frame.Guide rail fastening screw 608 is arranged in right jaw car body, by hydraulic-driven, completes that latch stretches out, fallback action, realizes the automatic location of mobile tailstock car body on load-bearing frame.Car body drive unit 609 and right jaw oil sources electric cabinet 610 are all fixed on right jaw car body below.
Referring to Fig. 4, described jaw clamp 8 comprises valve piston 801, draw back plate 802, liner plate 803, fixture block 804; Described valve piston 801 is arranged on respectively in left and right jaw car body, and draw back plate 802 is connected with valve piston, and liner plate 803 is put into left and right jaw car body, and draw back plate 802 is embedded in liner plate 803 groovings, according to different samples, choose suitable fixture block 804, embed in the dovetail groove of liner plate 803.
Referring to Fig. 5, described 2000kN oil sources comprises return oil filter 501, low precision oil filter 502, main oil pump 503, motor 504, surplus valve 506, high-precision oil filter 507, retaining valve 508, tensimeter 509, sequence valve 510; Servo-valve 511, shuttle valve 512, surplus valve 513, solenoid directional control valve 514, oil cylinder 515, unloader 516, motor 517, oil pump 518, low precision oil filter 519;
This electrohydraulic servo system is connected fuel tank and low precision oil filter 502 by oil pipe, this oil filter 502 connects the inlet port of main oil pump 503, main oil pump 503 is connected with motor 504, the oil-out of main oil pump 503 connects retaining valve 505, the oil-out four road pipeline roads in parallel of retaining valve 505: the first via connects surplus valve 506, through return oil filter 501 oil return casees.The second tunnel connects the high-precision oil filter 507 of working connection, after connect tensimeter 509, divide afterwards two-way, a road connects servo-valve P mouth, a road connects sequence valve 510 oil-ins, sequence valve 510 oil-out oil return casees.Third Road connects differential oil line retaining valve 508, and Si road connects unloader 516, oil return case.The T mouth connected tank of the servo-valve 511 on working connection.Its A mouth three road pipeline roads in parallel: first via shuttle valve 512, the second tunnels connect solenoid directional control valve 514, and Third Road connects 2000kN oil cylinder 515 oil-ins.Its B mouth connects solenoid directional control valve four road pipeline roads in parallel: the first via connects shuttle valve 512, the second tunnels and connects surplus valve 513, rear oil return case, and Third Road connects solenoid directional control valve 514, then connects A mouth, and Si road connects oil cylinder 515 oil return openings.Differential oil line is to connect fuel tank and low precision oil filter 519 by oil pipe, and this oil filter 519 connects the inlet port of differential oil pump 518, and differential oil pump 518 is connected with motor 517, and the oil-out of oil pump 518 connects retaining valve 508, converges with working connection.
The 2000kN tension test process of the microcomputer controlled electro-hydraulic servo horizontal tensile testing machine of the present embodiment is, mobile tailstock car body is adjusted to suitable position, make the spacing of left and right pincers be applicable to the length of sample, by hand control box or microcomputer control, guide rail fastening screw is inserted to two side rails.Sample is put into the fixture block of left and right pincers, by hand control box or microcomputer control, left and right pincers is tightened up, clamp sample, by microcomputer control, left jaw car body is loaded sample with the translational speed of 0-100mm/min, until sample is disrumpent feelings, so far the tension test of 2000kN station is complete.As need do 20kN handgrip exercise, repeat said procedure, load is added to 20% wire to be calculated after pull-off force and protects and carry, by 20kN oil cylinder piston pair, to the conductor spacer on wire or damper, hold head again horizontal pull (adjustable controlled) is provided, by displacement transducer, record conductor spacer, damper and hold head slippage along wire under the effect of nominal level pulling force, so far 20kN station test is complete.
The testing machine pressure measurement range of the present embodiment is in the range ability of 1%-100%, and the error of indication is in ± 1%; 2000kN oil cylinder range of displacement measurement requires at 0-1500mm, and 20kN oil cylinder range of displacement measurement requires at 0-200mm, and the error of indication is in ± 1%; Can meet the check part 1 of GB/T16826-2008<< electro-hydraulic servo universal testing machine >>, the quiet uniaxial test machine of GB/T6825.1<<: the check of pulling force and (or) pressure testing machine dynamometric system and calibration >> testing requirements.
The microcomputer controlled electro-hydraulic servo horizontal tensile testing machine that the present embodiment provides provides one to possess 2000kN and two of 20kN test stations, two power value type, 2000kN station be for measuring strain insulator, continue, the failure load test of the test of suspension clamp handgrip exercise, conductor spacer centripetal force, large part gold utensil and subassembly thereof, 20kN is mainly used in the handgrip exercise of (as conductor spacer, damper are held head) of assorted golden tool under wire tensioning condition.Each station has the advantages such as loading digit rate is steady, guarantor's year precision is high, test figure accuracy is high, stretching space is large, testpieces scope is wide, automaticity is high, the fixture that changes the outfit is convenient.
Claims (5)
1. an electro-hydraulic servo horizontal tensile testing machine, is characterized in that:
Comprise load-bearing frame, reaction frame assembly (7), mobile tailstock car body (6), jaw clamp (8), servo oil sources;
Described load-bearing frame comprises guide rail (1), the oil cylinder seat (2) of two Parallel Symmetrics, support (3), and described guide rail (1) is provided with fastening hole, and described mobile tailstock car body (6) slides and is fixed in fastening hole along guide rail (1);
Described oil cylinder seat (2) is bolted two side rails (1), and reaction frame assembly (7) is installed in its interstitial hole, composition stress frame; Described support (3) is arranged on guide rail (1) below;
Described jaw clamp (8) is arranged in mobile tailstock car body (6);
Described reaction frame assembly (7) comprises larger actuator cylinder piston, and described mobile tailstock car body (6) comprises smaller power oil cylinder piston.
2. electro-hydraulic servo horizontal tensile testing machine as claimed in claim 1, is characterized in that: on every pack support (3), fix two pressing plates (4), it is upper that pressing plate (4) is fixed on built-in fitting (5), and built-in fitting (5) casts in ground.
3. electro-hydraulic servo horizontal tensile testing machine as claimed in claim 1, is characterized in that: described reaction frame assembly (7) comprises left side car body (701), load sensor (702), bulb pair (703), 2000kN oil cylinder piston (704), connects thick stick (705), left jaw car body (706), left jaw oil sources (707); Described left side car body (701) is weldment, load sensor (702) is fixed on car body, bulb pair (703) is fixed on load sensor, by secondary bulb, be connected with 2000kN oil cylinder piston (704), two connect thick stick (705), left side car body (701) and left jaw car body (706) are coupled together, the fixing left jaw oil sources (707) in left jaw car body (706) below.
4. electro-hydraulic servo horizontal tensile testing machine as claimed in claim 1, is characterized in that:
Described mobile tailstock car body (6) comprises right jaw car body (601), 20kN oil cylinder piston (602), bulb pair (603), load sensor (604), connecting plate (605), whippletree (606), 20kN handgrip exercise beam (607), guide rail fastening screw (608), car body drive unit (609), right jaw oil sources electric cabinet (610);
Described right jaw car body (601) is connected and fixed for iron casting and 20kN oil cylinder piston, and bulb pair (603) is fixed on piston rod, load sensor (604) is connected with bulb pair (603), by fixing to connecting plate (605) and load cell (604);
By two whippletrees (606), 20kN handgrip exercise beam (607) and connecting plate (605) are coupled together;
Described guide rail fastening screw (608) is arranged in right jaw car body (601), by hydraulic-driven, completes that latch stretches out, fallback action;
Car body drive unit (609) and right jaw oil sources electric cabinet (610) are all fixed on right jaw car body (601) below.
5. electro-hydraulic servo horizontal tensile testing machine as claimed in claim 1, is characterized in that:
Described jaw clamp comprises valve piston (801), draw back plate (802), liner plate (803), fixture block (804);
Described valve piston (801) is arranged on respectively in left and right jaw car body, and draw back plate (802) is connected with valve piston (801), and liner plate (803) is put into left and right jaw car body, and draw back plate (802) embeds in liner plate (803) grooving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320737018.0U CN203587441U (en) | 2013-11-20 | 2013-11-20 | Electro-hydraulic servo horizontal tension tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320737018.0U CN203587441U (en) | 2013-11-20 | 2013-11-20 | Electro-hydraulic servo horizontal tension tester |
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| Publication Number | Publication Date |
|---|---|
| CN203587441U true CN203587441U (en) | 2014-05-07 |
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| CN201320737018.0U Expired - Lifetime CN203587441U (en) | 2013-11-20 | 2013-11-20 | Electro-hydraulic servo horizontal tension tester |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007016A (en) * | 2014-05-13 | 2014-08-27 | 深圳市瑞格尔仪器有限公司 | Electro-hydraulic servo horizontal tensile testing machine |
| CN104949832A (en) * | 2015-05-28 | 2015-09-30 | 同济大学 | Horizontal test platform for fracture, fatigue and chain length precision measurement of escalator driving chains |
| CN104964879A (en) * | 2015-07-28 | 2015-10-07 | 刘达 | Computer control electro-hydraulic servo enclosed-loop horizontal type tension tester |
| CN106018099A (en) * | 2016-06-22 | 2016-10-12 | 国网河南省电力公司电力科学研究院 | System and method for detecting crimping quality of end fitting of composite insulator |
| CN107024390A (en) * | 2017-03-13 | 2017-08-08 | 国网浙江省电力公司嘉兴供电公司 | A kind of horizontal puller system automatically moves head |
| CN107991190A (en) * | 2017-12-28 | 2018-05-04 | 中车兰州机车有限公司 | Pull force tester |
| CN110286034A (en) * | 2019-07-18 | 2019-09-27 | 湖北万测试验设备有限公司 | A kind of rotational symmetry bolt mechanism and horizontal tensile testing machine |
| CN110286035A (en) * | 2019-07-18 | 2019-09-27 | 湖北万测试验设备有限公司 | A kind of hydraulic bolt mechanism and horizontal tensile testing machine |
| CN112179777A (en) * | 2020-11-27 | 2021-01-05 | 南京仪汇仪器设备有限公司 | Degradable plastic products intensity detection device |
| CN112903261A (en) * | 2020-12-07 | 2021-06-04 | 平高集团有限公司 | Experimental detection device of damper |
| CN113405892A (en) * | 2021-07-05 | 2021-09-17 | 淄博千恒自动化工程有限公司 | Electric power fitting grip strength testing machine |
| CN114018715A (en) * | 2021-11-05 | 2022-02-08 | 永固集团股份有限公司 | Multipurpose horizontal tension testing machine for electric power fittings and testing method thereof |
| CN114264547A (en) * | 2021-11-16 | 2022-04-01 | 金华送变电工程有限公司 | Self-adaptive compensation device for tension test of rope ladder |
-
2013
- 2013-11-20 CN CN201320737018.0U patent/CN203587441U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007016A (en) * | 2014-05-13 | 2014-08-27 | 深圳市瑞格尔仪器有限公司 | Electro-hydraulic servo horizontal tensile testing machine |
| CN104949832A (en) * | 2015-05-28 | 2015-09-30 | 同济大学 | Horizontal test platform for fracture, fatigue and chain length precision measurement of escalator driving chains |
| CN104949832B (en) * | 2015-05-28 | 2017-06-13 | 同济大学 | A kind of horizontal drive chain of escalator is disrumpent feelings, tired and chain length precision measure testing stand |
| CN104964879A (en) * | 2015-07-28 | 2015-10-07 | 刘达 | Computer control electro-hydraulic servo enclosed-loop horizontal type tension tester |
| CN106018099A (en) * | 2016-06-22 | 2016-10-12 | 国网河南省电力公司电力科学研究院 | System and method for detecting crimping quality of end fitting of composite insulator |
| CN107024390A (en) * | 2017-03-13 | 2017-08-08 | 国网浙江省电力公司嘉兴供电公司 | A kind of horizontal puller system automatically moves head |
| CN107991190A (en) * | 2017-12-28 | 2018-05-04 | 中车兰州机车有限公司 | Pull force tester |
| CN110286034A (en) * | 2019-07-18 | 2019-09-27 | 湖北万测试验设备有限公司 | A kind of rotational symmetry bolt mechanism and horizontal tensile testing machine |
| CN110286035A (en) * | 2019-07-18 | 2019-09-27 | 湖北万测试验设备有限公司 | A kind of hydraulic bolt mechanism and horizontal tensile testing machine |
| CN112179777A (en) * | 2020-11-27 | 2021-01-05 | 南京仪汇仪器设备有限公司 | Degradable plastic products intensity detection device |
| CN112903261A (en) * | 2020-12-07 | 2021-06-04 | 平高集团有限公司 | Experimental detection device of damper |
| CN113405892A (en) * | 2021-07-05 | 2021-09-17 | 淄博千恒自动化工程有限公司 | Electric power fitting grip strength testing machine |
| CN114018715A (en) * | 2021-11-05 | 2022-02-08 | 永固集团股份有限公司 | Multipurpose horizontal tension testing machine for electric power fittings and testing method thereof |
| CN114018715B (en) * | 2021-11-05 | 2024-05-03 | 永固集团股份有限公司 | Multipurpose horizontal tensile testing machine for electric power fitting and testing method thereof |
| CN114264547A (en) * | 2021-11-16 | 2022-04-01 | 金华送变电工程有限公司 | Self-adaptive compensation device for tension test of rope ladder |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: No. 389, Sichuan Honglu, Pudong New Area, Shanghai Patentee after: Shanghai Hualong Test Instruments Co.,Ltd. Address before: No. 389, Sichuan Honglu, Pudong New Area, Shanghai Patentee before: SHANGHAI HUALONG TEST INSTRUMENTS Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |