CN110530720A - A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method - Google Patents

A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method Download PDF

Info

Publication number
CN110530720A
CN110530720A CN201910908902.8A CN201910908902A CN110530720A CN 110530720 A CN110530720 A CN 110530720A CN 201910908902 A CN201910908902 A CN 201910908902A CN 110530720 A CN110530720 A CN 110530720A
Authority
CN
China
Prior art keywords
safety rope
clamper
quiet
sample
high altitude
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910908902.8A
Other languages
Chinese (zh)
Inventor
刘瑞强
姜润喜
沈明
刘鹏
朱林
公彦秀
杜洪飞
陈岩
张曼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Withropenet Group Co Ltd
Ropenet Group Co Ltd
Original Assignee
Withropenet Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Withropenet Group Co Ltd filed Critical Withropenet Group Co Ltd
Priority to CN201910908902.8A priority Critical patent/CN110530720A/en
Publication of CN110530720A publication Critical patent/CN110530720A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001Type of application of the stress
    • G01N2203/0003Steady
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0017Tensile
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058Kind of property studied
    • G01N2203/006Crack, flaws, fracture or rupture
    • G01N2203/0067Fracture or rupture
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/026Specifications of the specimen
    • G01N2203/0262Shape of the specimen
    • G01N2203/0278Thin specimens
    • G01N2203/028One dimensional, e.g. filaments, wires, ropes or cables
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/06Indicating or recording means; Sensing means
    • G01N2203/067Parameter measured for estimating the property
    • G01N2203/0676Force, weight, load, energy, speed or acceleration

Landscapes

  • Physics & Mathematics (AREA)
  • 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 proposes a kind of quiet device for testing tensile force of high altitude operation safety rope, including supporting ontology, the support ontology square frame structure, described intrinsic one end of support connects telescopic device, the other end of the telescopic device is fixedly connected with the first clamper fixator, the first clamper fixator is fixedly connected by sensor with the first clamper, the intrinsic other end of support is fixedly connected with the second clamper fixator, the second clamper fixator is fixedly connected by connecting rod with the second clamper, the position of first clamper and the second clamper corresponds to each other, the upper and lower ends of the first clamper fixator are slidably connected with the clamper slide rail being arranged on the inside of support ontology.Detection process of the present invention is simple, high degree of automation, and simulating Safety rope is carried the security feature of time by the guarantor under certain quiet pulling force effect in high altitude operation and tested, using computer control mode, high degree of automation.

Description

A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method
Technical field
The present invention relates to a kind of quiet device for testing tensile force of high altitude operation safety rope and its test methods, belong to high altitude operation With safety rope performance parameter test field.
Background technique
For common fibrecord class product, concerned by people is the mechanical performances such as its breaking strength and elongation at break Index, and usually have ignored the service load and quiet pulling force of fibrecord.And rope is in use, it will usually be stretched Effect, especially under conditions of certain force, often maintains for a long time and works under certain force, at this time referred to as quiet pulling force, Europe Standard requirements A type rope guarantor in continent is loaded onto the quiet pulling force >=15KN of few 3min, and Type B rope, which requires to protect, is loaded onto the quiet pulling force >=12KN of few 3min.More For it will be evident that safety line is related to the life security of operating personnel especially in high altitude operation.High-altitude working safety protection Originating from Europe, Europe, the U.S. have carried out the system research of high-altitude working safety protection aspect for technology and equipment, grasp World-leading, related standard is also more complete for safety protection technique and material.The country is to high-altitude working safety guard technology In research starting evening, lack comprehensive, systematic research in this respect, the exploitation of high-altitude working safety guard system product is mainly Imitation to external product, there are also biggish gaps compared with external advanced product for security protection performance.To protective mechanism, quiet drawing Power is to injury of human rule, the safe military service behavior of security protection system and failure mechanism and security protection product evaluation body System, the country are more a lack of in-depth study.And safety rope is most important one aspect in high-altitude working safety protective gear.
On internal and international at present, it has been proposed that the concept of the quiet pulling force of high altitude operation safety rope, but basic performance Quiet pull test instrument system is established not yet, the test method of the quiet pulling force of safety rope is not formed, more without corresponding detection Instrument and equipment, and not enough due to internal security rope processing fining, it is enough there is no establishing to the quiet pulling force characteristic of safety rope Consciousness.Therefore, to guarantee that high altitude operation gives full play to its guaranteeing role in various aspects such as production, lives with safety rope, very It is necessary to be detected to high altitude operation with the quiet pulling force characteristic of safety rope, corresponding test method and corresponding detection are established and improve Instrument, it is necessary to the level for improving the protection work of China's high-rise working in this way.
Summary of the invention
The present invention is to solve above-mentioned the deficiencies in the prior art, proposes a kind of quiet tensile test dress of high altitude operation safety rope It sets and its test method, specific technical solution is as follows:
A kind of quiet device for testing tensile force of high altitude operation safety rope, including support ontology, the support ontology are square frame Frame structure, described intrinsic one end of support connect telescopic device, and the other end of the telescopic device is fixed with the first clamper Device is fixedly connected, and the first clamper fixator is fixedly connected by sensor with the first clamper, in the support ontology The other end be fixedly connected with the second clamper fixator, the second clamper fixator is solid by connecting rod and the second clamper The position of fixed connection, first clamper and the second clamper corresponds to each other, and up and down the two of the first clamper fixator The clamper slide rail held and be arranged on the inside of support ontology is slidably connected.
Preferably, which further includes control cabinet, and driving device is equipped in the control cabinet, is set on the control cabinet There are power switch and control switch.
Preferably, the telescopic device is cylinder or fluid cylinder.
Preferably, the sensor be Bidirectional load sensor, measurement range be 10kN~300kN, measurement error be ± 1%.
Preferably, the shape size of first clamper and the second clamper is identical, fixes for wheeled clamper, pin Eye thimble clamper or holding dog.
Preferably, the pin diameter of the fixed eye thimble clamper of the pin is more than or equal to the 2 of tested safety rope sample diameter Times;The diameter of the pinch wheels of the wheeled clamper is more than or equal to 10 times of tested safety rope sample.
Preferably, the flexible stroke of the telescopic device is 2000mm-4000mm.
Further, which further includes computer, the quiet tensile test software of built-in computer, the calculating Machine and PLC control module communication connection, the PLC control module electrically connect with the driving device in sensor and control cabinet respectively It connects.
A kind of quiet pull force test method of high altitude operation safety rope, the specific test method is as follows:
The both ends of first safety rope sample are connect with the first clamper and the second clamper respectively, according to high altitude operation The quiet pulling force size of standard requirements applied with safety rope, is arranged the first safety rope sample on the quiet tensile test software of computer It is required that the quiet pulling force numerical value of standard applied, and concurrently set corresponding guarantor and carry the time, starting driving device receives telescopic device Contracting, when the quiet pulling force numerical value of the standard for reaching setting, driving device is automatically stopped, if before keeping quiet pulling force to terminate the load time to guarantor First safety rope sample is broken, then the first safety rope failed sample;If first after keeping quiet pulling force to carry the time to guarantor Safety rope sample is unbroken, then the first safety rope sample passes, and controls driving device and telescopic device is made to continue to be contracted to The fracture of first safety rope sample, quiet tensile test software show and record quiet pulling force when the first safety rope sample is broken; The the second safety rope sample for taking same specification again is arranged different guarantors and carries time, repetitive operation, and quiet tensile test software shows and remembers Quiet pulling force when lower second safety rope sample fracture is recorded, quiet tensile test software can show the F-T of the quiet pull test of safety rope Curve, abscissa are to protect to carry the time, and ordinate is quiet pulling force when safety rope sample is broken.
Further, the pretreatment condition of the first safety rope sample and the second safety rope sample are as follows: the first safety rope Sample and the second safety rope sample are placed under the conditions of relative humidity 65% 48 hours;First safety rope sample and the second safety rope Sample is tested under the conditions of 20 ± 5 DEG C of temperature, relative humidity 60 ± 5%.
The quiet tensile test experiment of various specifications high altitude operation safety rope may be implemented in the present invention, and detection process is simply, certainly Dynamicization degree is high, and the security feature that simulating Safety rope is carried the time by the guarantor under certain quiet pulling force effect in high altitude operation carries out Test, using computer control mode, high degree of automation.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the quiet device for testing tensile force of high altitude operation safety rope of the present invention.
In figure: 1, supporting ontology;2, telescopic device;3, the first clamper fixator;4, sensor;5, the first clamper; 6, the second clamper fixator;7, connecting rod;8, the second clamper;9, control cabinet;10, power switch;11, control switch;12, Computer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of quiet device for testing tensile force of high altitude operation safety rope, including support ontology 1, the support is originally Body 1 is having a size of long 13000mm, width 1350mm, high 1100mm.The 1 square frame structure of support ontology, it is described to be horizontal One end in ontology 1 is supported to connect telescopic device 2, the other end of the telescopic device 2 and the fixed company of the first clamper fixator 3 It connects, the first clamper fixator 3 is fixedly connected by sensor 4 with the first clamper 5, another in the support ontology 1 One end is fixedly connected with the second clamper fixator 6, and the second clamper fixator 6 is solid by connecting rod 7 and the second clamper 8 The position of fixed connection, first clamper 5 and the second clamper 8 corresponds to each other, above and below the first clamper fixator 3 Both ends are slidably connected with the clamper slide rail that 1 inside of support ontology is arranged in.
The telescopic device 2 is cylinder or fluid cylinder, and the flexible stroke of the telescopic device 2 is 2000mm-4000mm.The survey It further includes control cabinet 9, model CTS-600, using complete-digital closed-loop TT&C system that trial assembly, which is set,.It is equipped in the control cabinet 9 Driving device, the control cabinet 9 are equipped with power switch 10 and control switch 11.The driving device is air pump or oil pump.
The sensor 4 is Bidirectional load sensor, and measurement range is 10kN~300kN, and measurement error is ± 1%, essence Degree is high.
First clamper 5 is identical with the shape size of the second clamper 8, is wheeled clamper, the fixed eye thimble of pin Clamper or holding dog.The pin diameter of the fixed eye thimble clamper of the pin is more than or equal to tested safety rope sample diameter 2 times;The diameter of the pinch wheels of the wheeled clamper is more than or equal to 10 times of tested safety rope sample.
The test device further includes computer 12, quiet tensile test software built in the computer 12, the computer 12 With PLC control module communication connection, the PLC control module electrically connects with the driving device in sensor 4 and control cabinet 9 respectively It connects.The PLC control module is mountable in control cabinet 9, also mountable on support ontology 1, can also individually be independently arranged.
A kind of quiet pull force test method of high altitude operation safety rope, the specific test method is as follows:
The both ends of first safety rope sample are connect with the first clamper 5 and the second clamper 8 respectively, are made according to high-altitude The industry quiet pulling force size of standard requirements that safety rope applies, is arranged the first safety rope on the quiet tensile test software of computer 12 The quiet pulling force numerical value of standard that sample requirement applies, and concurrently set corresponding guarantor and carry the time, quiet tensile test software is controlled by PLC Molding block starting driving device shrinks telescopic device 2, and when the quiet pulling force numerical value of the standard for reaching setting, driving device is automatic Stop, if quiet pulling force is kept to terminate preceding first safety rope sample fracture, the first safety rope failed sample to the load time is protected; If the first safety rope sample is unbroken after keeping quiet pulling force to carry the time to guarantor, the first safety rope sample passes, and after Continuous control driving device makes telescopic device 2 continue to be contracted to the fracture of the first safety rope sample, and quiet tensile test software is shown simultaneously Record quiet pulling force when the first safety rope sample fracture;The the second safety rope sample for taking same specification again, is arranged different guarantors Time, repetitive operation are carried, quiet tensile test software shows and records quiet pulling force when the second safety rope sample is broken, quiet drawing Power test software can show that the F-T curve of the quiet pull test of safety rope, abscissa are to protect to carry time T, and ordinate is safety rope sample Quiet pulling force F when product are broken.
The flexible of the telescopic device 2 can also be manually controlled by the control switch 11 on control cabinet 9.
The pretreatment condition of the first safety rope sample and the second safety rope sample are as follows: the first safety rope sample and second Safety rope sample is placed under the conditions of relative humidity 65% 48 hours;First safety rope sample and the second safety rope sample are in temperature It 20 ± 5 DEG C, tests under the conditions of relative humidity 60 ± 5%.
The present invention is used to test A type and whether the quiet pulling force of Type B high-altitude working safety rope meets standard requirements, wherein A type rope Quiet pulling force >=the 15KN of 3min is carried it is required that protecting, Type B rope, which requires to protect, is loaded onto the quiet pulling force >=12KN of few 3min, and safety rope specification limit is 7.5-18mm。
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc. With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this Within the protection scope of invention.

Claims (10)

1. a kind of quiet device for testing tensile force of high altitude operation safety rope, it is characterised in that: including supporting ontology (1), the support Ontology (1) square frame structure, described one end supported in ontology (1) connect telescopic device (2), the telescopic device (2) The other end be fixedly connected with the first clamper fixator (3), the first clamper fixator (3) by sensor (4) with First clamper (5) is fixedly connected, and the other end in support ontology (1) is fixedly connected with the second clamper fixator (6), institute State the second clamper fixator (6) and be fixedly connected with the second clamper (8) by connecting rod (7), first clamper (5) and The position of second clamper (8) corresponds to each other, and the upper and lower ends of the first clamper fixator (3) and setting are in support ontology (1) the clamper slide rail on the inside of is slidably connected.
2. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 1, it is characterised in that: the test Device further includes control cabinet (9), and driving device is equipped in the control cabinet (9), and the control cabinet (9) is equipped with power switch (10) and control switch (11).
3. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 1, it is characterised in that: described to stretch Compression apparatus (2) is cylinder or fluid cylinder.
4. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 1, it is characterised in that: the biography Sensor (4) is Bidirectional load sensor, and measurement range is 10kN~300kN, and measurement error is ± 1%.
5. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 1, it is characterised in that: described One clamper (5) is identical with the shape size of the second clamper (8), is wheeled clamper, the fixed eye thimble clamper of pin or wedge Clevis holder.
6. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 5, it is characterised in that: the pin The pin diameter of the fixed eye thimble clamper of column is more than or equal to 2 times of tested safety rope sample diameter;The folder of the wheeled clamper The diameter of bearing up pulley is more than or equal to 10 times of tested safety rope sample.
7. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 1, it is characterised in that: described to stretch The flexible stroke of compression apparatus (2) is 2000mm-4000mm.
8. a kind of quiet device for testing tensile force of high altitude operation safety rope according to claim 2, it is characterised in that: the test Device further includes computer (12), quiet tensile test software built in the computer (12), and the computer (12) and PLC are controlled Module communication connection, the PLC control module are electrically connected with the driving device in sensor (4) and control cabinet (9) respectively.
9. a kind of quiet pull force test method of high altitude operation safety rope, it is characterised in that: the specific test method is as follows:
The both ends of first safety rope sample are connect with the first clamper (5) and the second clamper (8) respectively, are made according to high-altitude The first safety is arranged in the industry quiet pulling force size of standard requirements that safety rope applies on the quiet tensile test software of computer (12) The quiet pulling force numerical value of standard that sample requirement of restricting applies, and concurrently set corresponding guarantor and carry the time, starting driving device to stretch Device (2) is shunk, and when the quiet pulling force numerical value of the standard for reaching setting, driving device is automatically stopped, if quiet pulling force is kept to carry to guarantor Time terminates preceding first safety rope sample fracture, then the first safety rope failed sample;If quiet pulling force is kept to carry the time to guarantor After the first safety rope sample it is unbroken, then the first safety rope sample passes, and control driving device and make telescopic device (2) continue to be contracted to the fracture of the first safety rope sample, quiet tensile test software, which shows and records the first safety rope sample, to break Quiet pulling force when splitting;The the second safety rope sample for taking same specification again is arranged different guarantors and carries time, repetitive operation, and quiet pulling force is surveyed Examination software shows and records quiet pulling force when the second safety rope sample is broken, and quiet tensile test software can show that safety rope is quiet The F-T curve of pull test, abscissa are to protect to carry the time, and ordinate is quiet pulling force when safety rope sample is broken.
10. a kind of quiet pull force test method of high altitude operation safety rope according to claim 9, it is characterised in that: described The pretreatment condition of first safety rope sample and the second safety rope sample are as follows: the first safety rope sample and the second safety rope sample are put It is placed under the conditions of relative humidity 65% 48 hours;First safety rope sample and the second safety rope sample are at 20 ± 5 DEG C of temperature, relatively It is tested under the conditions of humidity 60 ± 5%.
CN201910908902.8A 2019-09-25 2019-09-25 A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method Pending CN110530720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910908902.8A CN110530720A (en) 2019-09-25 2019-09-25 A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910908902.8A CN110530720A (en) 2019-09-25 2019-09-25 A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method

Publications (1)

Publication Number Publication Date
CN110530720A true CN110530720A (en) 2019-12-03

Family

ID=68670028

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910908902.8A Pending CN110530720A (en) 2019-09-25 2019-09-25 A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method

Country Status (1)

Country Link
CN (1) CN110530720A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112050855A (en) * 2020-09-07 2020-12-08 涂玉琴 Insulation tensile integration detecting system based on production of electric power safety rope

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105547894A (en) * 2015-12-03 2016-05-04 青岛华凯海洋科技有限公司 Testing method of safety performances of static rope
CN105699183A (en) * 2016-03-14 2016-06-22 镇江市建科工程质量检测中心有限公司 Safety rope breaking strength detection fixture and tester
DE102016101532A1 (en) * 2016-01-28 2017-08-03 Philipp Strasser A tilt measuring device for measuring a slope of a safety rope for a climber
CN110044696A (en) * 2019-04-10 2019-07-23 鲁普耐特集团有限公司 A kind of resistance to sharp comer test device of rope and its test method
CN210775033U (en) * 2019-09-25 2020-06-16 鲁普耐特集团有限公司 Quiet tensile test device of safety rope for high altitude construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105547894A (en) * 2015-12-03 2016-05-04 青岛华凯海洋科技有限公司 Testing method of safety performances of static rope
DE102016101532A1 (en) * 2016-01-28 2017-08-03 Philipp Strasser A tilt measuring device for measuring a slope of a safety rope for a climber
CN105699183A (en) * 2016-03-14 2016-06-22 镇江市建科工程质量检测中心有限公司 Safety rope breaking strength detection fixture and tester
CN110044696A (en) * 2019-04-10 2019-07-23 鲁普耐特集团有限公司 A kind of resistance to sharp comer test device of rope and its test method
CN210775033U (en) * 2019-09-25 2020-06-16 鲁普耐特集团有限公司 Quiet tensile test device of safety rope for high altitude construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112050855A (en) * 2020-09-07 2020-12-08 涂玉琴 Insulation tensile integration detecting system based on production of electric power safety rope

Similar Documents

Publication Publication Date Title
CN110530720A (en) A kind of quiet device for testing tensile force of high altitude operation safety rope and its test method
CN107121331B (en) Multifunctional rock mechanical property tester
CN210775033U (en) Quiet tensile test device of safety rope for high altitude construction
CN208899950U (en) A kind of slack rope pine chain, disconnected rope broken chain detecting device
CN108489824B (en) Multiaxial loading stress corrosion test equipment
CN201053909Y (en) Safe pliers debugging pressure test device
CN202522484U (en) Test device for long-term tensile performance of materials under constant load
CN208334073U (en) Creep testing machine
CN106122195B (en) Foot-operated tripping gear
CN108152134A (en) A kind of wall bushing cantilever loading experimental rig and test method
CN210005359U (en) building concrete sample pressure testing device
CN112082873A (en) Concrete compressive strength detection device and method
CN109765049B (en) Fatigue life testing device for main driving chain of escalator
CN106404401B (en) A kind of servo mechanism zero-bit lock test device and test method
CN207808041U (en) A kind of annular concrete product molding double roller centrifuge
CN110116821B (en) Test equipment and method for rapidly testing maximum takeoff weight of electric multi-rotor unmanned aerial vehicle
CN204882261U (en) Insulated joint moment test machine
CN210775378U (en) Fiber rope shrinkage tester
CN201575930U (en) Combined test device for safety clothes protection device
CN209784067U (en) Portable cement concrete pressure creep testing device
CN218909782U (en) Become electric fortune dimension inspection device
CN108535036B (en) Tool system for sail land-based lifting test
KR20140143250A (en) Load test apparatus for overhead lug and load test apparatus of overhead lug using it
CN208833487U (en) A kind of safety lock detection device
CN107352485B (en) Elevator with belt breakage early warning function

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination