CN109900506A - A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device - Google Patents
A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device Download PDFInfo
- Publication number
- CN109900506A CN109900506A CN201910190118.8A CN201910190118A CN109900506A CN 109900506 A CN109900506 A CN 109900506A CN 201910190118 A CN201910190118 A CN 201910190118A CN 109900506 A CN109900506 A CN 109900506A
- Authority
- CN
- China
- Prior art keywords
- bidirectional
- testing jig
- counterweight frame
- safety tongs
- speed limiter
- 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
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 131
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 103
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000009781 safety test method Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
This application involves elevator safety testing fields, more particularly to a kind of bidirectional speed limiter and bidirectional safety tongs ganged test device, including bracket, which is provided with two pairs of vertical guide rails, first guide rail clamping can upstream and downstream testing jig, the second guide rail clamping can upstream and downstream counterweight frame；The top of the bracket is equipped with fixed pulley assembly, the testing jig and counterweight frame by being connected with each other around the matched rope of the fixed pulley assembly, and when counterweight frame uplink, testing jig corresponds to downlink, and testing jig corresponds to uplink when counterweight frame downlink.After the bidirectional speed limiter and bidirectional safety tongs ganged test device install bidirectional speed limiter and bidirectional safety tongs, utilize testing jig and counterweight frame cable traction, so that testing jig is simulated the hypervelocity downlink and hypervelocity downlink fortuitous event of true elevator, effectively tests bidirectional speed limiter and whether the security performance of bidirectional safety tongs is up to standard.
Description
Technical field
The present invention relates to elevator safety testing fields, and in particular to a kind of bidirectional speed limiter and bidirectional safety tongs linkage are tested
Device.
Background technique
In elevator tooling, limiter of speed and safety tongs are the devices of elevator safety guarantee, and the two matches super as elevator
Linked protector when fast or out of control.Wherein device of the elevator governor as speed responsing and handling safety clamp device, and
Elevator safety gear is then with mechanical action by elevator mechanism of the stop on guide rail by force.When the downward Accelerating running of elevator, exceed
When elevator governor mechanical action speed, limiter of speed mechanical action blocks wirerope, and wirerope lifts safety tongs device linkage
Pull rod forces the voussoir of elevator safety gear to act and is clamped on cage guide, and then stop is led in elevator by force by lift car
On rail, to avoid that casualties and equipment damage accident occurs.
Occur a kind of bidirectional speed limiter and the bidirectional safety tongs with the linkage of this bidirectional speed limiter in the prior art, it is this
The bidirectional safety tongs of linkage can elevator occur hypervelocity uplink or hypervelocity downlink when by lift car stop on cage guide.
In a kind of elevator governor safety tongs linkage test of invention disclosed patent CN104183184A on December 3rd, 2014
Platform does not need for limiter of speed and safety tongs to be mounted on true elevator, in platform simulation elevator overspeed downlink, tests limiter of speed
Whether can normal stop with safety tongs.But such test platform is not suitable for the bidirectional speed limiter referred in the prior art and double
To safety tongs, effective means of testing is lacked to the stop situation of elevator overspeed uplink, uplink occurs for lift car after actual load
Accident may occur when hypervelocity.
Summary of the invention
It is an object of that present invention to provide a kind of bidirectional speed limiters and bidirectional safety tongs ganged test device, can be to two-way limit
The linkage stop of fast device and bidirectional safety tongs carries out the test of hypervelocity uplink or the downlink that exceeds the speed limit.
The technical solution adopted by the present invention is that a kind of bidirectional speed limiter and bidirectional safety tongs ganged test device, including can pacify
The bracket of bidirectional speed limiter is filled, which is provided with two pairs of bottoms from the bracket and leads toward the vertical of the top of bracket extension
Rail, the guide rail are the first guide rail and the second guide rail；For the testing jig of simulant elevator carriage movement, which is led by first
Rail clamping simultaneously cooperates with the first guide rail to facilitate the testing jig along the first guide rail upstream and downstream, and the branch, which is provided with, can drive this
First hoisting apparatus of testing jig uplink；The counterweight frame to pouring weight is carry, which is clamped by the second guide rail and with second
Guide rail cooperates to facilitate the counterweight frame along the second guide rail upstream and downstream, and the branch, which is provided with, can drive the of the counterweight frame uplink
Two hoisting apparatus；The testing jig or the mountable bidirectional safety tongs with bidirectional speed limiter linkage of counterweight frame；The bracket
Top is equipped with fixed pulley assembly, the testing jig and counterweight frame and is connected with each other by bypassing the matched rope of the fixed pulley assembly,
When counterweight frame uplink, testing jig corresponds to downlink, and testing jig corresponds to uplink when counterweight frame downlink.
Preferably, the fixed pulley assembly is two groups, wherein the matched rope of one group of fixed pulley assembly connects the test
The side of frame and counterweight frame, another group of matched rope of fixed pulley assembly connect the other side of the testing jig and counterweight frame.If
The two groups of pulley assemblies set can share the pulling force of rope receiving, and while making cable traction testing jig upstream or downstream is more flat
Surely.
Preferably, the fixed pulley assembly includes the fixed pulley at least two intervals.More than two intervals are arranged determines cunning
Wheel comparison uses single fixed pulley, increases the spacing distance of testing jig and counterweight frame accordingly, convenient for observation.
Preferably, the testing jig is cooperated by guide shoe and the first guide rail, and the counterweight frame passes through another guide shoe and second
Guide rail cooperation.Guide shoe can play the role of fixed testing jig and counterweight frame, reduce shake so that testing jig and counterweight frame uplink or
It is more stable when downlink.
Preferably, the bottom of the bracket is equipped with buffer corresponding with testing jig, counterweight rack position, described for buffering
Testing jig, counterweight frame.During the test, testing jig or counterweight frame will have a side to carry out under exceeding the speed limit in the form of freely falling body
Row, when limiter of speed and safety tongs cannot succeed stop, the bottom contact buffer that testing jig or counterweight frame fall on bracket slows down
Downstream rate avoids the occurrence of accidental damage device.
Preferably, the first refitting is set to first electric block at the top for being located at bracket, first electric block
It is connect with the first electromagnet that can pick up the testing jig.
Preferably, second hoisting apparatus is the second electric block for being located at the top of bracket, second electric block
It is connect with the second electromagnet that can pick up the testing jig.Electric block as hoisting apparatus is small in size, from heavy and light, operation letter
Single, testing jig or counterweight frame use electromagnet as picking up testing jig accordingly using that can be formed by the material that electromagnet picks up
Or the device of counterweight frame, disconnecting power supply when discharging testing jig or counterweight frame can be more convenient.
Operation workflow of the invention is as follows: bracket of the invention installs bidirectional speed limiter to be measured, testing jig installation and this pair
The bidirectional safety tongs to be measured to link to limiter of speed.Overspeed descending test: 1. utilize the weight to pouring weight adjustment testing jig and counterweight frame
Amount makes the weight of testing jig be greater than the weight of counterweight frame；2. being lifted using the first hoisting apparatus driving testing jig uplink to certain
Height；3. discharging testing jig, testing jig makees the movement of falling object, and exceed the speed limit downlink, if bidirectional speed limiter and bidirectional safe at this time
The stop testing jig that can link is clamped, then illustrates that the stop of fruit bidirectional speed limiter and bidirectional safety tongs is functional, complies with standard.Uplink
Hypervelocity test: 1., using the weight to pouring weight adjustment testing jig and counterweight frame, make the weight of counterweight frame be greater than the weight of testing jig；
2. being lifted using the second hoisting apparatus driving counterweight frame uplink to certain height；3. discharging counterweight frame, counterweight frame work is freely fallen
Body movement, exceed the speed limit downlink, and at this time since testing jig and counterweight frame around the rope of fixed pulley assembly by connecting, testing jig is corresponding
The movement of hypervelocity uplink is made on ground, and the stop testing jig if bidirectional speed limiter and bidirectional safety tongs can link illustrates the two-way limit
Fast device and bidirectional safety tongs stop are functional, comply with standard.It is true by above-mentioned overspeed descending test and uplink hypervelocity test
It protects bidirectional speed limiter and bidirectional safety tongs has good stop performance, prevent that accident occurs after elevator actual load.
Compared with prior art, the present invention have it is following the utility model has the advantages that
Testing jig of the present invention can simulate lift car there is a situation where hypervelocity uplink and hypervelocity downlink, avoid true
Elevator on tested, significantly reduce the cost of test, observe more intuitive, inspection using independent external test device
Repair more convenient, and elevator governor safety tongs linkage test platform compared with prior art can not only be to the feelings of overspeed descending
Condition is tested, moreover it is possible to which the case where exceeding the speed limit to uplink is tested, and bidirectional speed limiter and bidirectional safety tongs are suitable for.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the three-dimensional when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Perspective view；
Fig. 2 is the main view when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Figure；
Fig. 3 is the side view when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Figure；
Fig. 4 is the three-dimensional when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is released
It is three-dimensional；
Fig. 5 is the side view when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is released
Figure；
Fig. 6 is the three-dimensional when counterweight frame of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Perspective view；
Fig. 7 is the side view when counterweight frame of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Figure；
Fig. 8 is the three-dimensional when counterweight frame of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is released
Perspective view；
Fig. 9 is the side view when counterweight frame of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is released
Figure；
In figure:
100, bracket 11, testing jig 12, the first guide rail
21, counterweight frame 22, the second guide rail 23, to pouring weight
31, fixed pulley assembly 310, rope 32, fixed pulley assembly 320, rope
41, buffer 51, bidirectional speed limiter 52, bidirectional safety tongs
61, the first electric block 62, the first electromagnet
Specific embodiment
The three-dimensional when testing jig for bidirectional speed limiter and bidirectional safety tongs ganged test device is raised as shown in Figure 1 is vertical
Body figure, the bracket 100 including cuboid, the bottom setting of bracket 100 extend to two pairs of guide rails at 100 top of bracket, are respectively
First guide rail 12 and the second guide rail 22.Testing jig 11 is cooperated by guide shoe and the first guide rail 12, is clamped between the first guide rail 12,
Counterweight frame 21 cooperates also by another guide shoe and the second guide rail 22, is clamped between the second guide rail 22, facilitates testing jig 11 and right
Weight frame 21 carries out uplink or downward movement.The bottom of bracket 100 is equipped with buffer 41, buffer 41 and testing jig 11, counterweight
It is corresponding on 21 position of frame, play the role of buffering test frame 11,21 downlink of counterweight frame.
The top of bracket 100 is equipped with two groups of fixed pulley assemblies 31,32, and rope 310,320 bypasses fixed pulley assembly 31,32,
Connecting test frame 11 and counterweight frame 21.When 21 uplink of counterweight frame, testing jig 11 is drawn corresponding ground downlink by rope 310,320, right
When weight 21 downlink of frame, testing jig is drawn correspondingly uplink by rope 310,320, and specifically, fixed pulley assembly 31,32 is distributed in branch
At left and right sides of the top of frame 100, testing jig 11 and counterweight frame 21 is set to keep rough balance, fixed pulley assembly 31,32 includes
Two fixed pulleys spaced apart.
Fig. 2 is the main view when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Figure, in conjunction with Fig. 1, the top of bracket 100 sets hoisting apparatus, and the first hoisting apparatus corresponds to testing jig 11, and the second hoisting apparatus is corresponding
Counterweight frame 21.It is set to example with the first refitting, hoisting apparatus is the first electric block 61, first electric block 61 and lower section
The connection of first electromagnet 62, when needing to lift testing jig 11, the first electromagnet 62 picks up the testing jig 11 of metal composition, the first electricity
The dynamic starting of cucurbit 61 operation, the first electromagnet of pull-up 62 make testing jig 11 go upward to certain altitude.Similarly, the second hoisting apparatus
It is also the fit structure of electric block and electromagnet, is the second electric block and the second electromagnet.
Fig. 3 is the side view when testing jig of bidirectional speed limiter and bidirectional safety tongs ganged test device of the invention is raised
Figure, in conjunction with Fig. 1, bidirectional speed limiter 51 to be tested is installed at the top of bracket 100, is cooperated in testing jig 11 and the first guide rail 12
Install the bidirectional safety tongs 52 to link with the bidirectional speed limiter 51, bidirectional speed limiter 51 to be tested and bidirectional safety tongs in position
52 belong to the prior art.
Bidirectional speed limiter of the invention and bidirectional safety tongs ganged test device real work process are as follows: overspeed descending is surveyed
Examination: an makes the weight of testing jig 11 be greater than the weight of counterweight frame 21 as shown in Figure 1, will be placed on testing jig 11 to pouring weight 23；
Two, the first electric blocks 61 and the cooperation of the first electromagnet 62, driving 11 uplink of testing jig lift to certain height；Three, are disconnected
First electromagnet, 62 power supply discharges testing jig 11, and testing jig 11 makees the movement of falling object, and exceed the speed limit downlink, if at this time in conjunction with Fig. 1-5
Bidirectional speed limiter 51 and bidirectional safety tongs 52 can link stop testing jig 11, then illustrate bidirectional speed limiter 51 and bidirectional safety tongs 52
Stop it is functional, comply with standard.Uplink hypervelocity test: 1. as shown in fig. 6, will be placed on counterweight frame 21 pouring weight 23, make
The weight of counterweight frame 21 is greater than the weight of testing jig 11；2. the second electric block and the cooperation of the second electromagnet, drive counterweight frame 21
Uplink lifts to certain height；3. disconnecting electromagnet power supply, counterweight frame 21 is discharged, counterweight frame 21 makees the movement of falling object, surpasses
Fast downlink, at this time since testing jig 11 and counterweight frame 21 pass through the rope around fixed pulley assembly 31,32 in conjunction with shown in Fig. 6-9
310,320 connection, testing jig 11 correspondingly make the movement of hypervelocity uplink, if bidirectional speed limiter 51 and bidirectional safety tongs 52 can join
Dynamic stop testing jig 11, then illustrate that the bidirectional speed limiter 51 and 52 stop of bidirectional safety tongs are functional, comply with standard.
Bidirectional speed limiter and bidirectional safety tongs ganged test device through the invention, are avoided that and survey in true elevator
It tries, with testing jig simulant elevator car speeding uplink and hypervelocity downlink, whether test bidirectional speed limiter and bidirectional safety tongs link
Normally, observation is more intuitive, overhauls more convenient.In other embodiments, bidirectional safety tongs are mounted on counterweight frame and
On two guide rail cooperation positions, it equally can also reach identical technical effect.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
Protect range limitation, those skilled in the art should understand that, can modify to technical solution of the present invention or
Equivalent replacement, without departing from the spirit and scope of technical solution of the present invention.
Claims (7)
1. a kind of bidirectional speed limiter and bidirectional safety tongs ganged test device, it is characterised in that:
Bracket including mountable bidirectional speed limiter, the branch are provided with two pairs of bottoms from the bracket and extend toward the top of the bracket
Vertical guide rail, the guide rail be the first guide rail and the second guide rail；
For the testing jig of simulant elevator carriage movement, which is clamped and cooperated with the first guide rail with convenient by the first guide rail
For the testing jig along the first guide rail upstream and downstream, the branch is provided with the first hoisting apparatus that can drive the testing jig uplink；
The counterweight frame to pouring weight is carry, which is clamped and cooperated with the second guide rail to facilitate the counterweight frame by the second guide rail
Along the second guide rail upstream and downstream, the branch is provided with the second hoisting apparatus that can drive the counterweight frame uplink；
The testing jig or the mountable bidirectional safety tongs with bidirectional speed limiter linkage of counterweight frame；
The top of the bracket is equipped with fixed pulley assembly, the testing jig and counterweight frame by bypassing the matched rope of the fixed pulley assembly
Rope is connected with each other, and when counterweight frame uplink, testing jig corresponds to downlink, and testing jig corresponds to uplink when counterweight frame downlink.
2. bidirectional speed limiter according to claim 1 and bidirectional safety tongs ganged test device, it is characterised in that: described fixed
Pulley assembly is two groups, wherein one group of matched rope of fixed pulley assembly connects the side of the testing jig and counterweight frame, it is another
The group matched rope of fixed pulley assembly connects the other side of the testing jig and counterweight frame.
3. bidirectional speed limiter according to claim 1 or 2 and bidirectional safety tongs ganged test device, it is characterised in that:
The fixed pulley assembly includes the fixed pulley at least two intervals.
4. bidirectional speed limiter according to claim 1 and bidirectional safety tongs ganged test device, it is characterised in that: the survey
It tries frame to cooperate by the first guide shoe and the first guide rail, the counterweight frame is cooperated by the second guide shoe and the second guide rail.
5. bidirectional speed limiter according to claim 1 and bidirectional safety tongs ganged test device, it is characterised in that:
The bottom of the bracket is equipped with buffer corresponding with testing jig, counterweight rack position, for buffering the testing jig, counterweight
Frame.
6. bidirectional speed limiter according to claim 1 and bidirectional safety tongs ganged test device, it is characterised in that:
The first refitting is set to first electric block at the top for being located at bracket, first electric block and can pick up described
First electromagnet of testing jig connects.
7. bidirectional speed limiter according to claim 1 or 6 and bidirectional safety tongs ganged test device, it is characterised in that:
Second hoisting apparatus is the second electric block for being located at the top of bracket, second electric block and can be picked up described
Second electromagnet of testing jig connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190118.8A CN109900506A (en) | 2019-03-13 | 2019-03-13 | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910190118.8A CN109900506A (en) | 2019-03-13 | 2019-03-13 | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109900506A true CN109900506A (en) | 2019-06-18 |
Family
ID=66952094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910190118.8A Pending CN109900506A (en) | 2019-03-13 | 2019-03-13 | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109900506A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070053A (en) * | 2010-10-26 | 2011-05-25 | 西子奥的斯电梯有限公司 | Test device of elevator car ascending overspeed protection device |
| CN103193126A (en) * | 2013-04-11 | 2013-07-10 | 中国特种设备检测研究院 | Elevator ascending test system |
| CN104183184A (en) * | 2014-08-08 | 2014-12-03 | 中山市合泽设备科技有限公司 | Elevator speed governor safety gear linkage testing platform |
| CN104555640A (en) * | 2013-10-29 | 2015-04-29 | 浙江梅轮电扶梯成套有限公司 | Position limiting device safety tong linkage automatic test method |
| CN204549715U (en) * | 2015-03-05 | 2015-08-12 | 张研 | Elevator two-way speed limiting safety tongs |
| DE202017005334U1 (en) * | 2017-10-17 | 2019-01-18 | Wittur Holding Gmbh | Device for controlling a speed limiter belt and electronic speed limiter |
| EP3444215A1 (en) * | 2017-08-17 | 2019-02-20 | Aip Aps | Methods and systems for testing a fall arrest device |
| CN209542119U (en) * | 2019-03-13 | 2019-10-25 | 中山职业技术学院 | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device |
-
2019
- 2019-03-13 CN CN201910190118.8A patent/CN109900506A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070053A (en) * | 2010-10-26 | 2011-05-25 | 西子奥的斯电梯有限公司 | Test device of elevator car ascending overspeed protection device |
| CN103193126A (en) * | 2013-04-11 | 2013-07-10 | 中国特种设备检测研究院 | Elevator ascending test system |
| CN104555640A (en) * | 2013-10-29 | 2015-04-29 | 浙江梅轮电扶梯成套有限公司 | Position limiting device safety tong linkage automatic test method |
| CN104183184A (en) * | 2014-08-08 | 2014-12-03 | 中山市合泽设备科技有限公司 | Elevator speed governor safety gear linkage testing platform |
| CN204549715U (en) * | 2015-03-05 | 2015-08-12 | 张研 | Elevator two-way speed limiting safety tongs |
| EP3444215A1 (en) * | 2017-08-17 | 2019-02-20 | Aip Aps | Methods and systems for testing a fall arrest device |
| DE202017005334U1 (en) * | 2017-10-17 | 2019-01-18 | Wittur Holding Gmbh | Device for controlling a speed limiter belt and electronic speed limiter |
| CN209542119U (en) * | 2019-03-13 | 2019-10-25 | 中山职业技术学院 | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device |
Non-Patent Citations (1)
| Title |
|---|
| 谭健;: "电梯限速器――安全钳联动试验失效及检验", 中国特种设备安全, no. 05, 30 May 2007 (2007-05-30) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209542119U (en) | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device | |
| CN102897624B (en) | Fall-prevention safety protection device for vertical lift elevator | |
| CN203143877U (en) | Elevator machine room arrangement structure | |
| US9868616B2 (en) | Double-deck elevator | |
| CN103193126B (en) | A kind of ascending for elevator pilot system | |
| CN205472122U (en) | Elevator rope tension automatic regulating apparatus | |
| CN103528786A (en) | Multifunctional test device and working method thereof | |
| CN207226741U (en) | A kind of elevator for improving protection base | |
| CN108622761A (en) | A kind of fall protection equipment of elevator | |
| CN103175708B (en) | Elevator descending testing system | |
| CN203465079U (en) | Multifunctional testing device | |
| CN107445006B (en) | Oblique elevator safety gear testing device and method | |
| CN203372941U (en) | Mechanical safe quick-disconnect device for vertical lift and drop test and impact test | |
| CN109900506A (en) | A kind of bidirectional speed limiter and bidirectional safety tongs ganged test device | |
| CN102583129A (en) | Vertical elevator falling rescue device adopting buoyancy technology | |
| CN103197651B (en) | A kind of triplex redundance redundant computation machine observe and control system of elevator test | |
| CN206114271U (en) | Protector test platform absolutely restricts | |
| CN218937713U (en) | Elevator buffer detection test device | |
| CN208430800U (en) | A kind of building engineering fall protection device for working at height | |
| CN214495304U (en) | Testing device for up-going overspeed protection of elevator car | |
| CN203806979U (en) | Steel wire rope stress balance adjusting device | |
| CN101648664B (en) | Trackless lift | |
| CN201358070Y (en) | Counter weight tower wagon type tension device | |
| CN105392728B (en) | Lift appliance | |
| CN110697539B (en) | Auxiliary braking mechanism for preventing elevator from falling |
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 |