CN112794209A - A wire rope lifting stroke measuring device - Google Patents
A wire rope lifting stroke measuring device Download PDFInfo
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- CN112794209A CN112794209A CN202110044824.9A CN202110044824A CN112794209A CN 112794209 A CN112794209 A CN 112794209A CN 202110044824 A CN202110044824 A CN 202110044824A CN 112794209 A CN112794209 A CN 112794209A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
- 239000010959 steel Substances 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims description 15
- 239000004677 Nylon Substances 0.000 claims description 14
- 229920001778 nylon Polymers 0.000 claims description 14
- 239000003973 paint Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/46—Position indicators for suspended loads or for crane elements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
本发明公开了一种钢丝绳升降行程测量装置，包括安装有传动模块及测量模块的箱体，整个箱体通过螺栓螺母固接在钢丝绳竖直升降部分顶端。传动模块通过与钢丝绳紧密接触的测量轮将钢丝绳的上下移动转换成测量轮轴末端导磁齿轮的转动。测量模块通过霍尔双通道传感器测出导磁齿轮转动的圈数，并将高电平信号经由无线数传模块转换成数字信号，无线传输给安装于操作室中的运算模块进行计算。运算模块通过公式计算出钢丝绳实际升降距离，最后将结果传输给同样安装于操作室中的操控面板显示。解决了现有技术中存在的，实时测量起重设备钢丝绳升降距离的问题，能够提高起重作业质量和效率。
The invention discloses a wire rope lifting stroke measuring device, which comprises a box body on which a transmission module and a measuring module are installed. The transmission module converts the up and down movement of the wire rope into the rotation of the magnetic conductive gear at the end of the measuring wheel shaft through the measuring wheel in close contact with the steel wire rope. The measurement module measures the number of turns of the magnetic conductive gear through the Hall dual-channel sensor, and converts the high-level signal into a digital signal through the wireless data transmission module, and wirelessly transmits it to the operation module installed in the operating room for calculation. The arithmetic module calculates the actual lifting distance of the wire rope through the formula, and finally transmits the result to the control panel also installed in the operating room for display. The problem of real-time measurement of the lifting distance of the wire rope of the hoisting equipment in the prior art is solved, and the quality and efficiency of the hoisting operation can be improved.
Description
Technical Field
The invention belongs to the technical field of hoisting measuring devices, and particularly relates to a steel wire rope lifting stroke measuring device.
Background
In the hoisting industry, a steel wire rope is commonly used for hoisting heavy objects, and when hoisting equipment is used for hoisting heavy objects, the hoisting distance of the steel wire rope needs to be displayed in an operation room in real time for a crane driver to refer to, so that related operations can be adjusted in time, and hoisting operation can be completed more efficiently and safely. For example: the tower crane hoists the building materials to corresponding floors, a gantry crane hoists containers and the like. In the above several kinds of work scenes, 1 ~ 2 observation personnel are usually equipped to observe the heavy object lifting condition to communicate with the crane driver in the control room in real time with the intercom, but exchange efficiency is lower and have the potential safety hazard. Therefore, the lifting distance of the steel wire rope is displayed in real time in the operating room, a crane driver can judge the lifting condition of the heavy object, and the communication efficiency with an observer and the lifting operation quality are improved.
Disclosure of Invention
The invention aims to provide a steel wire rope lifting travel measuring device, which solves the problem of measuring the lifting distance of a steel wire rope in real time in hoisting equipment.
The invention adopts the technical scheme that the steel wire rope lifting travel measuring device comprises a box body with an opening at one side, wherein a box cover is covered on the side surface of the opening at one side of the box body, four bolt holes are formed in the surface of the box body, the bolt holes are positioned on four angular points of the box body, and a square hole is formed in the middle position of the side surface of the box body, which is provided with the bolt holes;
the transmission module is fixed in the box body and is connected with the measurement module through a signal, the measurement module is connected with the operation module through a signal, and the operation module is connected with the display module through a wire.
The transmission module comprises a measuring wheel shaft, two ends of the measuring wheel shaft are respectively and fixedly provided with a bearing, and the surface of the measuring wheel shaft is connected with a measuring wheel through a flat key;
a measuring wheel support is fixed in the box body through bolts and nuts, the measuring wheel support comprises a bottom plate and two partition plates, the interior of the box body is divided into three parts by the two partition plates, and ear holes are formed in one ends of the partition plates, which are far away from the fixed end of the measuring wheel support; the bearing is clamped in the ear hole of the partition plate, and a bearing cover is covered on the bearing;
the measuring wheel is provided with a groove along the lateral peripheral surface, and a steel wire rope is clamped in the groove; a motor is installed on a bottom plate of the measuring wheel support through a bolt nut, a rotating shaft is fixed at one end of the motor and fixedly connected with one end of a ball screw, a screw nut is installed at the other end of the ball screw through threads, the screw nut is fixedly installed on one side of a pressing plate through the bolt nut, and the other side of the pressing plate is adjacent to a steel wire rope; the steel wire rope penetrates out of a square hole in the surface of the box body;
one end of the measuring wheel shaft penetrates out of the bearing, a magnetic conduction gear is fixedly mounted at the penetrating end, and an elastic check ring for the shaft is mounted at one end, far away from the measuring wheel shaft, of the magnetic conduction gear.
The two ends of the pressure plate are fixedly provided with rollers, and the pressure plate is clamped between the two clapboards of the measuring wheel support through the rollers; two limit switches are fixedly arranged on the partition board close to the magnetic conduction gear, the limit switches are connected to the motor through wires, and the two limit switches are respectively positioned on two sides of the pressing plate; the adjacent sides of the pressing plate and the steel wire rope are stuck with nylon sheets.
The measuring module comprises a Hall two-channel sensor, the Hall two-channel sensor is adjacent to the magnetic-conductive gear, the Hall two-channel sensor is installed in the box body through a sensor support, and the sensor support is installed on the box body through bolts and nuts; the Hall dual-channel sensor is connected with a wireless data transmission module through a lead, and the wireless data transmission module is connected with a battery pack; the wireless data transmission module is connected with the operation module through a digital signal.
The operation module comprises an arithmetic unit, a lifting judgment circuit and a memory, and is connected with a power supply.
The nylon ring is stuck in the groove of the measuring wheel.
The outer surfaces of the box body and the box cover are sprayed with antirust paint.
The invention has the beneficial effects that: the number of observers and human errors can be reduced, and the communication efficiency and the lifting operation quality are improved. Meanwhile, the whole device does not change the original structure and control mode of the hoisting equipment, is easy to install, has certain dustproof and waterproof functions and is applicable to most weather conditions.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic view of the internal structure of the present invention;
FIG. 4 is a diagrammatic view of the drive configuration of the present invention;
FIG. 5 is a schematic diagram of the steering system of the present invention;
FIG. 6 is a schematic view of an operation panel according to the present invention.
In the figure, 1, a roller, 2, a pressing plate, 3, a steel wire rope, 4, a nylon sheet, 5, a screw nut, 6, a ball screw, 7, a motor, 8, a limit switch, 9, a wireless data transmission module, 10, a battery pack, 11, an elastic check ring for a shaft, 12, a magnetic conduction gear, 13, a Hall dual-channel sensor, 14, a sensor support, 15, a measuring wheel shaft, 16, a measuring wheel, 17, a nylon ring, 18, a bearing cover, 19, a bearing, 20, a measuring wheel support, 21, a box body, 22, a box cover, 23, an operation module, 24, a power supply and 25 are arranged on an operation panel.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The technical scheme adopted by the invention is as shown in fig. 1, fig. 2 and fig. 3, the steel wire rope lifting travel measuring device comprises a box body 21 with an opening on one side, a box cover 22 is covered on the side surface of the opening on one side of the box body 21, four bolt holes are formed in the surface of the box body 21 and are positioned on four angular points of the box body 21, and a square hole is formed in the middle position of the side of the box body 21 provided with the bolt holes;
the transmission module is fixed in the box body 21 and is connected with the measurement module through a signal, the measurement module is connected with the operation module 23 through a signal, and the operation module 23 is connected with the display module through a wire.
The transmission module comprises a measuring wheel shaft 15, two ends of the measuring wheel shaft 15 are respectively and fixedly provided with a bearing 19, and the surface of the measuring wheel shaft 15 is connected with a measuring wheel 16 through a flat key;
a measuring wheel support 20 is fixed in the box body 21 through bolts and nuts, the measuring wheel support 20 comprises a bottom plate and two partition plates, the interior of the box body 21 is divided into three parts by the two partition plates, and ear holes are formed in one ends of the partition plates, which are far away from the fixed end of the measuring wheel support 20; the bearing 19 is clamped in the ear hole of the clapboard, and a bearing cover 18 is covered outside the bearing 19;
the measuring wheel 16 is provided with a groove along the lateral periphery, and a steel wire rope 3 is clamped in the groove; a motor 7 is mounted on a bottom plate of the measuring wheel support 20 through a bolt and a nut, a rotating shaft is fixed at one end of the motor 7 and fixedly connected with one end of a ball screw 6, a screw nut 5 is mounted at the other end of the ball screw 6 through threads, the screw nut 5 is fixedly mounted on one side of a pressing plate 2 through the bolt and the nut, and the other side of the pressing plate 2 is adjacent to a steel wire rope 3; the steel wire rope 3 penetrates out of a square hole in the surface of the box body 21;
one end of the measuring wheel shaft 15 penetrates through the bearing 19, the penetrating end is fixedly provided with the magnetic conduction gear 12, and one end, far away from the measuring wheel shaft 15, of the magnetic conduction gear 12 is provided with the elastic collar 11 for the shaft.
The two ends of the pressing plate 2 are fixedly provided with the rollers 1, and the pressing plate 2 is clamped between the two clapboards of the measuring wheel support 20 through the rollers 1; two limit switches 8 are fixedly arranged on the partition board close to the magnetic conduction gear 12, the limit switches 8 are connected to the motor 7 through wires, and the two limit switches 8 are respectively positioned on two sides of the pressing plate 2; the nylon sheet 4 is stuck on the side of the pressing plate 2 adjacent to the steel wire rope 3.
The measuring module comprises a Hall dual-channel sensor 13, the Hall dual-channel sensor 13 is adjacent to the magnetic conduction gear 12, the Hall dual-channel sensor 13 is installed in the box body 21 through a sensor support 14, and the sensor support 14 is installed on the box body 21 through bolts and nuts; the Hall dual-channel sensor 13 is connected with a wireless data transmission module 9 through a lead, and the wireless data transmission module 9 is connected with a battery pack 10; the wireless data transmission module 9 is connected with the operation module 23 through a digital signal.
The operation module 23 comprises an arithmetic unit, a lifting judgment circuit and a memory, and the operation module 23 is connected with a power supply 24.
A nylon ring 17 is stuck in the groove of the measuring wheel 16.
The outer surfaces of the box body 21 and the box cover 22 are sprayed with antirust paint.
The working process of the invention is as shown in fig. 3, fig. 4, fig. 5 and fig. 6, the lifting movement of the steel wire rope 3 is changed into the rotation of the magnetic conductive gear 12 at the tail end of the measuring wheel shaft 15 through the measuring wheel 16, and then the number of turns of the magnetic conductive gear 12 is measured by the Hall dual-channel sensor 13. The wireless data transmission module 9 receives the high level signal sent by the hall double-channel sensor 13, converts the high level signal into a digital signal, and wirelessly transmits the digital signal to the operation module 23 installed in the operation room. The operation module 23 calculates the actual moving distance of the steel wire rope through a formula, stores the actual moving distance and sends the actual moving distance to the control panel 25 for display.
The working principle of the invention is shown in figures 1-6, and the invention relates to a steel wire rope lifting travel measuring device which has a simple overall, internal and transmission structure diagram, and a schematic diagram of an operation system and an operation panel. The invention comprises an external box body 21 and a box cover 22, wherein the box body is provided with bolt holes and is arranged at the top end of a steel wire rope vertical lifting part (such as a sliding trolley for drawing the steel wire rope) through bolts and nuts, and the outer layers of the box body 21 and the box cover 22 are sprayed with antirust paint. The box body is internally provided with a transmission module and a measurement module, and the operation module and the display module are arranged in the operation room.
The transmission module comprises a magnetic conductive gear 12 and a measuring wheel 16. The measuring wheel 16 is partially provided with a measuring wheel support 20 and a bearing cover 18, the measuring wheel support 20 is fixed in a box body 21 through bolts and nuts, lug holes on two sides are used for installing bearings 19, and the measuring wheel 16 is connected with a measuring wheel shaft 15 through a flat key and is supported on the measuring wheel support 20 through the bearings 19.
The middle of the measuring wheel support 20 is provided with a motor 7 (rated voltage 24V, direct current). The motor 7 drives the ball screw 6 to rotate, and pushes the pressing plate 2 arranged on the screw nut 5 to move back and forth along the axis of the ball screw 6. The pressure plate 2 presses the wire rope 3 to the measuring wheel 16 to keep the two in close contact. In addition, the two sides of the pressure plate 2 are respectively provided with the roller 1, so that the pressure plate 2 can flexibly move along the sliding groove on the inner side of the measuring wheel support 20. Two limit switches 8 are arranged on the inner side of the measuring wheel support 20, and when the pressure plate 2 touches the limit switches 8, the motor 7 stops rotating. The nylon sheet 4 and the nylon ring 17 are respectively attached to the parts of the pressure plate 2 and the measuring wheel 16, which are in contact with the steel wire rope 3. And the inner side of the measuring wheel support 20 is sprayed with antirust paint.
The nylon sheet 4 and the nylon ring 17 are respectively stuck on the pressure plate 2 and the measuring wheel 16 by adhesives, so that the friction force between the steel wire rope 3 and the measuring wheel 16 can be increased, the slippage is reduced, and the abrasion of the steel wire rope can be effectively reduced. The nylon sheet 4 and the nylon ring 17 can be replaced periodically.
And a magnetic conductive gear 12 for measurement is arranged at the tail end of the measuring wheel shaft 15. The magnetic-conductive gear 12 rotates for one circle, and two channels a and B of the hall dual-channel sensor 13 respectively receive z high levels corresponding to the number of teeth. The steel wire rope 3 is upward (figure 2) and rotates downward (figure 3) corresponding to the rotation directions of the measuring wheel 16 and the magnetic conduction gear 12 in a positive direction without changing the rotation direction in the set transmission process.
The measuring module comprises a wireless data transmission module 9, a battery pack 10 and a Hall dual-channel sensor 13. The working voltage of the wireless data transmission module 9 is 24V, and the working voltage of the Hall dual-channel sensor 13 is 5V. The battery pack 10 is a 24V direct-current power supply and supplies power for the wireless data transmission module 9 and the motor 7, and the Hall dual-channel sensor 13 is supplied with power after the voltage of the wireless data transmission module 9 is reduced.
The hall dual-channel sensor 13 is installed in the box 21 through a sensor support 14. An upper Hall piece and a lower Hall piece are arranged in the Hall dual-channel sensor 13 and respectively correspond to the channels A and B. When the magnetic conductive gear 12 rotates downwards and forwards as shown in fig. 3, the lower hall plate is triggered first, and then the upper hall plate is triggered, i.e. the high level signal of the channel B leads the channel a. On the contrary, when the magnetic gear 12 rotates reversely upward as shown in fig. 3, the upper hall plate is triggered first and then the lower hall plate is triggered, that is, the high level signal of the a channel leads the B channel, the wireless data transmission module 9 receives the high level signals of A, B two channels of the hall dual-channel sensor 13 and converts the high level signals into two sets of digital signals containing high level signal information, and then the digital signals are wirelessly transmitted to the operation module 23, the lifting judgment circuit built in the operation module 23 can judge the lifting of the steel wire rope according to the leading condition of the high levels of A, B two channels of the received two sets of digital signals, the steel wire rope is in a lifting state when the B channel is leading, and the steel wire rope is in a lowering state when the a channel is.
The operation module 23 is internally provided with an arithmetic unit, a lifting judgment circuit and a memory, has a working voltage of 12V, is installed in an operation room, and is powered by a cab power supply 24. The operation module 23 receives the digital signal of the high level signal information of the two channels a and B of the hall dual-channel sensor 13 sent by the wireless data transmission module 9, the ascending and descending state of the steel wire rope is judged by the ascending and descending judgment circuit, then the arithmetic unit substitutes the data into the following formula to calculate the actual moving distance of the steel wire rope, and the actual moving distance is stored in the memory and output to the control panel 25 for display.
In the formula: s is the actual ascending or descending distance of the steel wire rope every time, namely mm;
n is the number of signals recorded by the operation module;
z is the number of teeth of the magnetic conductive gear, and z is more than or equal to 5;
d is the effective diameter of the measuring wheel, mm.
The display module includes a control panel 25, as shown in fig. 6, the control panel 25 has a power button and a measurement button, and a power supply and a measurement indicator light are correspondingly provided, and the working voltage is 12V, and is supplied by a cab power supply 24. The working requirements are as follows, the power supply button controls the power supply of the operation module 23 and the control panel 25, and the measurement button controls the power supply of the motor 7, the wireless data transmission module 9 and the Hall dual-channel sensor 13. When the hoisting operation is started, the power button is pressed first, then the measuring button is pressed, then the steel wire rope is operated to lift, and in addition, the measuring button is pressed again, the measurement is stopped, and data displayed by the control panel is cleared.
The control panel 25 can simultaneously display the current actual lifting distance of the steel wire rope and the accumulated moving distance of the steel wire rope calculated by the operation module 23. The steel wire rope moving distance display frame is a 4-digit nixie tube, an external decimal point is arranged between the last two nixie tubes, the unit is m, and the measuring range is 0-99.9 m (the recommended minimum stroke is more than or equal to 0.1 m). The lifting judgment circuit in the operation module 23 judges that the steel wire rope is in a lifting state, and the first position is not displayed; if the steel wire rope is judged to be in a descending state, the first position shows a minus sign, and the last three positions show that the steel wire rope is in the ascending or descending distance. The steel wire rope accumulated moving distance display frame is a 5-digit nixie tube, an external decimal point is arranged between the last two nixie tubes, the unit is m, the measuring range is 0-999.9 m, the first digit represents positive/negative, the first digit is not displayed when the value is positive, and the first digit displays a minus sign when the value is negative. When the measuring button is pressed, the current moving distance display frame continuously updates data along with the ascending or descending of the steel wire rope each time, and the accumulated moving distance display frame also updates the data and displays the accumulated value of each ascending or descending distance. When the measuring button is pressed again, a new round of measurement is started, at the moment, the two display frames are reset to zero, and new measurement is waited to be displayed.
The steel wire rope lifting travel measuring device can reduce the number of observers and human errors, and improve the alternating current efficiency and the lifting operation quality. Meanwhile, the whole device does not change the original structure and control mode of the hoisting equipment, is easy to install, has certain dustproof and waterproof functions and is applicable to most weather conditions.
Claims (7)
1. The device for measuring the lifting stroke of the steel wire rope is characterized by comprising a box body (21) with an opening at one side, wherein a box cover (22) is covered on the side surface of the opening at one side of the box body (21), four bolt holes are formed in the surface of the box body (21), the bolt holes are positioned at four angular points of the box body (21), and a square hole is formed in the middle position of the side, provided with the bolt holes, of the box body (21);
the transmission module is fixed in the box body (21), the transmission module is connected with the measurement module through signals, the measurement module is connected with the operation module (23) through signals, and the operation module (23) is connected with the display module through a wire.
2. The steel wire rope lifting stroke measuring device according to claim 1, wherein the transmission module comprises a measuring wheel shaft (15), two ends of the measuring wheel shaft (15) are respectively and fixedly provided with a bearing (19), and the surface of the measuring wheel shaft (15) is connected with a measuring wheel (16) through a flat key;
a measuring wheel support (20) is fixed in the box body (21) through bolts and nuts, the measuring wheel support (20) comprises a bottom plate and two partition plates, the two partition plates divide the interior of the box body (21) into three parts, and ear holes are formed in one ends, far away from the fixed end of the measuring wheel support (20), of the partition plates; the bearing (19) is clamped in the ear hole of the partition plate, and a bearing cover (18) is covered outside the bearing (19);
a groove is formed in the measuring wheel (16) along the lateral peripheral surface, and a steel wire rope (3) is clamped in the groove; a motor (7) is mounted on a bottom plate of the measuring wheel support (20) through a bolt and a nut, a rotating shaft is fixed at one end of the motor (7), the rotating shaft is fixedly connected with one end of a ball screw (6), a screw nut (5) is mounted at the other end of the ball screw (6) through threads, the screw nut (5) is fixedly mounted on one side of the pressing plate (2) through the bolt and the nut, and the other side of the pressing plate (2) is adjacent to the steel wire rope (3); the steel wire rope (3) penetrates out of a square hole in the surface of the box body (21);
one end of the measuring wheel shaft (15) penetrates out of the bearing (19), the penetrating end is fixedly provided with a magnetic conduction gear (12), and one end, far away from the measuring wheel shaft (15), of the magnetic conduction gear (12) is provided with an elastic check ring (11) for a shaft.
3. The steel wire rope lifting stroke measuring device according to claim 2, wherein rollers (1) are fixedly mounted at two ends of the pressure plate (2), and the pressure plate (2) is clamped between two partition plates of the measuring wheel support (20) through the rollers (1); two limit switches (8) are fixedly mounted on the partition board close to the magnetic conductive gear (12), the limit switches (8) are connected to the motor (7) through wires, and the two limit switches (8) are respectively positioned on two sides of the pressing plate (2); and nylon sheets (4) are adhered to the adjacent sides of the pressing plate (2) and the steel wire rope (3).
4. A steel wire rope lifting stroke measuring device according to claim 2, characterized in that the measuring module comprises a hall dual-channel sensor (13), the hall dual-channel sensor (13) is adjacent to the magnetic conductive gear (12), the hall dual-channel sensor (13) is installed in a box body (21) through a sensor bracket (14), and the sensor bracket (14) is installed on the box body (21) through bolts and nuts; the Hall dual-channel sensor (13) is connected with a wireless data transmission module (9) through a lead, and the wireless data transmission module (9) is connected with a battery pack (10); the wireless data transmission module (9) is connected with the operation module (23) through a digital signal.
5. The steel wire rope lifting stroke measuring device according to claim 1, wherein the computing module (23) comprises an operator, a lifting judgment circuit and a memory, and the computing module (23) is connected with a power supply (24).
6. A steel wire rope lifting stroke measuring device according to claim 1, wherein a nylon ring (17) is stuck in the groove of the measuring wheel (16).
7. A steel wire rope lifting stroke measuring device according to claim 1, wherein the outer surfaces of the box body (21) and the box cover (22) are coated with rust-proof paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110044824.9A CN112794209A (en) | 2021-01-13 | 2021-01-13 | A wire rope lifting stroke measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110044824.9A CN112794209A (en) | 2021-01-13 | 2021-01-13 | A wire rope lifting stroke measuring device |
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| CN112794209A true CN112794209A (en) | 2021-05-14 |
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| CN202110044824.9A Pending CN112794209A (en) | 2021-01-13 | 2021-01-13 | A wire rope lifting stroke measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116005936A (en) * | 2023-03-28 | 2023-04-25 | 烟台市公路事业发展中心 | Suspension for building construction |
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|---|---|---|---|---|
| CN116005936A (en) * | 2023-03-28 | 2023-04-25 | 烟台市公路事业发展中心 | Suspension for building construction |
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Application publication date: 20210514 |
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