CN110411772B - Elevator no-load static traction test detection method and device - Google Patents
Elevator no-load static traction test detection method and device Download PDFInfo
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- CN110411772B CN110411772B CN201910712539.2A CN201910712539A CN110411772B CN 110411772 B CN110411772 B CN 110411772B CN 201910712539 A CN201910712539 A CN 201910712539A CN 110411772 B CN110411772 B CN 110411772B
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
Abstract
An elevator no-load static traction test detection method and an elevator no-load static traction test detection device. The elevator no-load static traction test detection device comprises a distance measuring device for measuring the displacement change of a traction steel wire rope and a traction force loading system for applying traction force to the traction steel wire rope, and the traction force loading system can apply tension to the traction steel wire rope so as to meet the test requirements. The invention applies pulling force to the traction steel wire rope by pulling the support beam of the base of the traction machine, and can simulate the loading load of the lift car. The distance measuring device can measure the distance from the distance measuring device to the ceiling of the machine room, and whether the traction steel wire rope has displacement change or not is judged by checking whether the distance has change or not. The traction force loading system is adopted to apply tension to the traction steel wire rope, and weights are not used, so that the problems of high labor intensity, low test efficiency and the like caused by the adoption of a load test in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of special equipment detection, in particular to an elevator no-load static traction test detection method and an elevator no-load static traction test detection device.
Background
The elevator static traction test is an on-load test, the test object is a freight elevator with the car area exceeding the regulation, and the specific content is as follows when the corresponding relation between the relevant car area and the rated load is influenced by the acceptance of a new elevator or the transformation of the elevator during the test: for the freight elevator with the car area exceeding the specified value, carrying out a static traction test by using the rated load capacity which is 1.25 times of the actual car area; unit car for rated load capacityThe effective area of the compartment is not less than 200kg/m2The calculated non-commercial car elevator was subjected to a static traction test at 1.5 times the rated load.
According to the provisions of the elevator inspection gauge TSG7001, all elevator static traction tests are load tests, and before the tests, weights for the tests are carried into a car, and then the subsequent test steps are carried out according to the procedures. The load test is adopted, a large number of weights need to be carried, the labor intensity is high, and the test efficiency can be greatly reduced.
Disclosure of Invention
In summary, how to provide a static traction test method for a no-load elevator to solve the problems of high test labor intensity and low test efficiency in the conventional on-load test becomes a problem to be solved urgently by the technical staff in the field.
In order to achieve the above purpose, the invention provides the following technical scheme:
a detection method for an elevator no-load static traction test is characterized in that a traction steel wire rope is exerted with a pulling force, and the displacement change of the traction steel wire rope is detected in the process of exerting the pulling force on the traction steel wire rope.
Meanwhile, the invention provides an elevator no-load static traction test detection device, which comprises: the distance measuring equipment is arranged on the traction steel wire rope and is used for measuring the displacement change of the traction steel wire rope; the traction force loading system comprises a clamping block for being installed on the traction steel wire rope, a traction force loading device is fixedly arranged on the clamping block, a lower fixing rod fixedly arranged relative to a support beam of a tractor base is arranged on the traction force loading device, and a tension sensor for detecting test tension applied by the traction force loading device is arranged on the lower fixing rod.
The elevator no-load static traction test detection device as described above is more preferably: the traction force loading device comprises a driving motor, a speed reducer is in power connection with the driving motor, the power end of the speed reducer is connected with the tension sensor, and the lower fixing rod is connected with the tension sensor.
The elevator no-load static traction test detection device as described above is more preferably: the tension sensor is an S-shaped tension sensor, the upper portion of the tension sensor is connected with a screw rod, the screw rod is connected with the power end of the speed reducer, and the lower portion of the tension sensor is connected with the lower fixing rod.
The elevator no-load static traction test detection device as described above is more preferably: the lower fixing rod comprises a flexible connecting rope, one end of the connecting rope is fixedly connected with the tension sensor, and the other end of the connecting rope is used for being clamped to a support beam of the elevator traction machine base.
The elevator no-load static traction test detection device as described above is more preferably: the clamping block comprises a clamping plate and an inner lining block, a clamping plate groove for clamping and assembling the inner lining block is formed in the clamping plate, and an assembling groove for assembling a steel wire rope is formed in the outer side surface of the inner lining block; the two clamping blocks are arranged oppositely and at intervals, and a clamping and fixing space for clamping the traction steel wire rope is formed between the inner lining blocks arranged on the two clamping blocks; the inner lining block is replaceable according to the specification and the number of the steel wire ropes, the inner lining block is made of a high polymer composite material, and the two clamping plates are connected through bolts.
The elevator no-load static traction test detection device as described above is more preferably: the clamping plate is provided with a mounting seat, and the speed reducer is fixedly arranged on the mounting seat.
The elevator no-load static traction test detection device as described above is more preferably: the distance measuring device is a laser distance measuring instrument, a signal acquisition display instrument is in signal connection with the distance measuring device, the signal acquisition display instrument is also in signal connection with the tension sensor and the traction force loading device, and the connection mode is wired or wireless connection.
The elevator no-load static traction test detection device as described above is more preferably: the traction force loading devices are arranged in two groups, and the two groups of traction force loading devices are symmetrically arranged and are respectively arranged at two opposite sides of the traction steel wire rope.
The elevator no-load static traction test detection device as described above is more preferably: the lower fixing rod is of a rod-shaped structure made of hard materials.
Compared with the prior art, the invention has the advantages and beneficial effects that:
the invention discloses a detection method for an elevator no-load static traction test, and based on the detection method, the invention also provides a detection device for the elevator no-load static traction test. Specifically, the elevator no-load static traction test detection device comprises a distance measuring device for measuring the displacement change of a traction steel wire rope and a traction force loading system for applying traction force to the traction steel wire rope, and the traction force loading system can apply tension to the traction steel wire rope so as to meet the test requirements. Through the structural design, the traction steel wire rope is pulled by pulling the elevator traction machine base to apply tension to the traction steel wire rope, and the test can be completed by simulating the load of the elevator car. The distance measuring device can measure the distance from the distance measuring device to the ceiling of the machine room, and whether the traction steel wire rope has displacement change or not is judged by checking whether the distance has change or not. The traction force loading system is adopted to apply tension to the traction steel wire rope, and weights are not used, so that the problems of high labor intensity, low test efficiency and the like caused by the adoption of a load test in the prior art can be solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
fig. 1 is a perspective view of an elevator no-load static traction test detection device after installation in an embodiment of the invention;
FIG. 2 is a schematic diagram of the structure of the elevator unloaded static traction test detection device after installation in one embodiment of the invention;
fig. 3 is a partial structural schematic view of an elevator no-load static traction test detection device in an embodiment of the invention;
FIG. 4 is a perspective view of a traction loading system in accordance with an embodiment of the present invention;
FIG. 5 is a front view of a traction loading system in accordance with an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a clamp block according to an embodiment of the present invention;
FIG. 7 is a schematic view of a splint according to an embodiment of the present invention;
FIG. 8 is a schematic illustration of an inner pad construction according to an embodiment of the present invention;
fig. 9 is a partial structural schematic diagram of the trapezoidal thread sleeve and the trapezoidal screw rod.
In fig. 1 to 8, the correspondence between the part names and the reference numerals is: the device comprises a distance measuring device 1, a clamping block 2, a lower fixing rod 3, a tension sensor 4, a driving motor 5, a speed reducer 6, a connecting rope 7, a signal acquisition display instrument 8, a clamping plate 9, an inner lining block 10, a connecting sleeve 11, a trapezoidal thread rotary drum 12, a plane thrust bearing 13 and a mounting seat 14.
In FIG. 9, d is the major diameter (nominal diameter) of the male thread, P is the thread pitch, acIs the crest pitch, H1Is the basic tooth form height (H)1＝0.5P)，h3Is the height (h) of the external thread3＝H1+ac＝0.5P+ac)，H4Is the height of the internal thread (H)4＝H1+ac＝0.5P+ac) Z is the tooth crest height (Z is 0.25P is H)1/2)，d2Is an external thread middle warp (d)2＝d-2Z＝d-0.5P)，D2Is an internal thread middle warp (D)2＝d-2Z＝d-0.5P)，d3Is a minor diameter (d) of the external thread3＝d-2h3)，D1Is a minor diameter of the internal thread (D)1＝d-2H1＝d-P)，D4Is the major diameter (D) of the internal thread4＝d+2ac) And b is the root width.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Referring to fig. 1 to 9, fig. 1 is a perspective view of an elevator no-load static traction test detection device after being installed according to an embodiment of the present invention; FIG. 2 is a schematic diagram of the structure of the elevator unloaded static traction test detection device after installation in one embodiment of the invention; fig. 3 is a partial structural schematic view of an elevator no-load static traction test detection device in an embodiment of the invention; FIG. 4 is a three-view illustration of a drag force loading system in accordance with an embodiment of the present invention; FIG. 5 is a front view of a traction loading system in accordance with an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a clamp block according to an embodiment of the present invention; FIG. 7 is a schematic view of a splint according to an embodiment of the present invention; FIG. 8 is a schematic illustration of an inner pad construction according to an embodiment of the present invention; fig. 9 is a partial structural schematic diagram of the trapezoidal thread sleeve and the trapezoidal screw rod.
The invention provides a detection method for an elevator no-load static traction test, which specifically operates as follows: and applying a pulling force to the traction steel wire rope, and detecting the displacement change of the traction steel wire rope in the process of applying the pulling force to the traction steel wire rope. The above concept differs from the prior art in that: the invention directly applies pulling force to the traction steel wire rope, thereby simulating the heavy load of the lift car and completing the static traction test of the elevator.
The invention aims to provide a no-load static traction test detection device to solve the problems of labor waste, low test efficiency and the like of the traditional detection method in which weights need to be carried.
The core concept of the invention is as follows: the hardware equipment forming the invention is installed on a traction steel wire rope on the cage side of a machine room, wherein one end of a traction force loading device is fixed on the traction steel wire rope, and the other end of the traction force loading device is fixed on a support beam of a tractor base. During testing, the traction force loading device applies a pulling force to the traction steel wire rope, and the pulling force is measured through the pulling force sensor 4, so that the pulling force applied by the traction force loading device is controlled to meet the test requirements. After the test tension has reached the standard, it is left to stand for a certain period of time (e.g. 10 minutes), during which the change in the displacement of the hoisting rope is detected.
The invention also provides an elevator no-load static traction test detection device, which specifically comprises: the distance measuring device comprises a distance measuring device 1 and a traction force loading system, wherein the distance measuring device 1 is used for being arranged on a traction steel wire rope and measuring the displacement change of the traction steel wire rope, the traction force loading system is used for applying traction force on the traction steel wire rope, the traction force loading system comprises a clamping block 2 which is used for being arranged on the traction steel wire rope, a traction force loading device is fixedly arranged on the clamping block 2, the traction force loading device is provided with a lower fixing rod 3 which is fixedly arranged relative to a support beam of a base of the traction machine, and a tension sensor 4 used for detecting test tension applied by the traction force loading device is arranged on the lower.
To those skilled in the art, an elevator system is composed of a traction machine, a traction wire rope set, a guide pulley, and the like. After the traction steel wire rope group bypasses a traction wheel of a traction machine, one end of the traction steel wire rope group is fixedly connected with the lift car, and the other end of the traction steel wire rope group is connected with a counterweight. Because the counterweight weight is equal to the car weight + the rated load, the force on the counterweight-side hoisting wire rope is greater than the force on the car-side hoisting wire rope when the elevator is empty. Based on the structure, according to an elevator Euler formula, when the device is actually installed, the elevator no-load static traction test detection device provided by the invention is installed on a traction steel wire rope on the car side, and the distance measuring equipment 1 and the traction force loading system are installed on the same side.
In above-mentioned structural design, range unit 1 preferably adopts laser range finder, installs range unit 1 on towing wire rope and fixes, and range unit 1 uses the computer lab roof as the reference, when towing wire rope and skidding and appear the displacement change, range unit 1 can remove along with towing wire rope, and its distance apart from the roof will change, then just can be affirmed: when the distance between the distance measuring equipment 1 and the roof is changed, the dragging steel wire rope slips.
The distance measuring equipment 1 is preferably a laser distance measuring instrument because the laser distance measuring instrument has the advantages of small size, portability, high distance measuring precision and the like, the laser distance measuring instrument has a small structure, is convenient to install on a traction steel wire rope, can improve the test precision due to high distance measuring precision, and avoids the problem that the distance cannot be measured due to micro-slippage. Of course, the invention can also be used with other types of distance measuring devices 1, such as ultrasonic distance meters and the like.
In order to reflect the distance measurement result visually, the invention is also provided with a signal acquisition display instrument 8 which is in signal connection with the distance measurement equipment 1 and is used for displaying the distance measurement data in real time, and the signal acquisition display instrument 8 is also in signal connection with the tension sensor 4 and the traction loading device (specifically, a driver of a driving motor of the traction loading device), and the connection mode is wired or wireless connection. The signal acquisition display instrument 8 is internally provided with a control circuit board, a communication interface is arranged on the control circuit board, and the laser range finder, the tension sensor 4 and a driver of the driving motor can be inserted into the communication interface through a data line to realize the transmission of data information and can also be in wireless connection. The signal acquisition display instrument control circuit board has the functions of signal processing and the like, and a PID control method is introduced in a feedback link, so that the stability of applying force on the traction steel wire rope can be ensured. Specifically, the signal acquisition display instrument can receive signals detected by the tension sensor 4, calculate a tension value and feed the tension value back to a driver of the driving motor as a feedback signal, so as to control the torque of the driving motor. Meanwhile, after the signal acquisition display instrument receives the ranging data information, the display screen of the signal acquisition display instrument 8 can be controlled to display the ranging data, and the ranging result can be directly observed.
When the screw rod lifting torque is calculated, the calculation derivation of the screw rod lifting torque is as follows:
the force for lifting the steel wire rope is provided by the screw rod, and in the invention, the screw rod is a trapezoidal screw rod which is the most commonly used transmission element on tool machinery and precision machinery, has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency. The root of the trapezoidal thread is high in strength and good in centering property, is more wear-resistant compared with other threads, and has a self-locking function when the lead angle of the thread is smaller than 5 degrees.
The torque of the trapezoidal thread rotary drum is shown as formula (1):
Mq＝Mt1+Mt2+Mt3 (1)
in the formula: mqIs the driving torque; mt1Is the thread friction torque; mt2Friction torque of the axial support surface of the screw rod; mt3The friction torque of the radial bearing of the screw rod.
In the design, a thrust bearing and a deep groove ball bearing are added on a supporting surface (a structure of a mounting seat) for supporting the trapezoidal thread rotary drum, and a friction torque M of an axial supporting surface of a screw rod is used fort2Radial bearing friction torque M of lead screwt3The influence on the system is reduced to a small value, where it is ignored, so MqThe calculation formula of (2) can be simplified as:
Mq≈Mt1 (2)
d2＝d-0.5P (4)
in the formula: d2The pitch diameter of the external thread; f is the axial load of the screw drive; λ is a lead angle; ρ' is the equivalent friction angle; d is the major diameter (nominal diameter) of the external thread; p is a screw pitch; s is the lead; f is a friction factor; alpha is a groove-shaped included angle.
The specification of the T-shaped thread adopted by the invention is as follows: the relationship between the lift force and the moment can be obtained by substituting the parameters d to 16mm, P to 2mm, s to 2mm, f to 0.06, and α to pi/2 into the equations (2) to (6).
The traction force loading system is an innovative key point of the invention, is arranged on a traction steel wire rope, and can apply pulling force to the traction steel wire rope by taking a building body or a support beam of a tractor base as a fixed traction point, thereby applying an acting force which is equal to the gravity of a load to the traction steel wire rope.
Specifically, the traction force loading system comprises two clamping blocks 2, wherein the two clamping blocks 2 are respectively arranged on two sides of the traction steel wire rope and are screwed and fixed on the traction steel wire rope through bolts. For technicians in the field, a plurality of traction steel wire ropes are arranged at the same time, and in order to improve the firmness degree of the clamping blocks 2 arranged on the traction steel wire ropes, a plurality of clamping grooves corresponding to the traction steel wire ropes are arranged on one side surface, which is used for being contacted with the traction steel wire ropes, of the clamping blocks 2, the two clamping blocks 2 are clamped on the traction steel wire ropes, and the traction steel wire ropes are just clamped in the clamping grooves. In order to improve the structural strength of the clamping block 2, the clamping block 2 can be a stainless steel clamping block or a cast iron clamping block, and the clamping block 2 is of an integrated structure.
In one embodiment of the present invention, the clamp block includes a clamp plate 9 and a lining block 10, a groove of the clamp plate 9 for the clamp fitting of the lining block 10 is provided on the clamp plate 9, an assembly groove for the assembly of the wire rope is provided on an outer side surface of the lining block 10, a thickness of the lining block 10 is larger than a depth of the assembly groove, an outer surface of the inner pad 10 protrudes with respect to the groove of the clamp plate 9 after the inner pad 10 is fitted into the groove of the clamp plate 9, and an assembly groove is provided on an outer side surface of the inner pad 10 (i.e., a portion protruding with respect to the groove of the clamp plate 9). The two clamping blocks are arranged oppositely and at intervals, and a clamping and fixing space for clamping the traction steel wire rope is formed between the inner lining blocks 10 arranged on the two clamping blocks; the inner lining blocks 10 are replaceable according to the specification and the number of the steel wire ropes, the inner lining blocks 10 are made of polymer composite materials (the hardness of the inner lining blocks 10 can be reduced, the situation that the inner lining blocks are clamped on the steel wire ropes to damage the steel wire ropes is avoided), the two clamping plates 9 are connected through bolts, and therefore each steel wire rope can be clamped by the assembling grooves formed in the inner lining blocks 10.
The clamping block 2 has the function of being fixedly installed on the traction steel wire rope, and also has the function of assembling other equipment, for example, a traction force loading device needs to be fixedly arranged on the clamping block 2, so that the clamping plate 9 is provided with an installation seat, and the traction force loading device (specifically a speed reducer 6) is fixedly arranged on the installation seat. The mounting base is arranged according to the structure of the traction loading device, and the structural design standard is that the traction loading device can be just clamped and can be stably arranged. Of course, the traction force loading device arranged on the mounting seat can also be fixed through the bolt assembly.
It should be noted that: because the distance measuring equipment is independently fixed on the steel wire rope, the distance measuring equipment only bears the weight of the distance measuring equipment, and the position of the distance measuring equipment cannot be moved in the measuring process. If the driving motor adopts a fixed-torque mode, the test result cannot be influenced if the driving motor slightly slips, and the driving motor needs to be installed and fixed again if the driving motor severely slips.
Specifically, the traction force loading device comprises a driving motor 5, a speed reducer 6 is in power connection with the driving motor 5, a tension sensor 4 is connected to the power end of the speed reducer 6, and a lower fixing rod 3 is connected with the tension sensor 4. The driving motor 5 and the speed reducer 6 are connected together to form a complete set of power assembly capable of providing power. The speed reducer 6 has the functions of reducing the rotating speed and improving the torque, and the driving motor 5 is matched with the speed reducer 6 for use, so that sufficient test loading force can be provided. The speed reducer 6 is provided with a torque output end, the torque output end of the speed reducer 6 is connected with the tension sensor 4, the tension sensor 4 is connected with the lower fixing rod 3, the lower fixing rod 3 is fixedly connected with a building or a support beam of a tractor base, and the tension sensor 4 can measure the tension between the speed reducer 6 and the lower fixing rod 3, wherein the tension is the tension applied to the traction steel wire rope by the traction steel wire rope traction device.
In the present invention, the speed reducer is a harmonic speed reducer.
Specifically, the torque output end of the speed reducer is connected with a connecting sleeve 11 through a key, the lower end of the connecting sleeve is connected with a trapezoidal thread rotary drum 12, a plane thrust bearing 13 is arranged on the mounting seat, the speed reducer and the driving motor are mounted on a clamping plate, and the trapezoidal thread rotary drum is fixed after being abutted against the plane thrust bearing arranged on the mounting seat 14 (the clamping plate component).
The tension sensor comprises a tension sensor main body, the upper end and the lower end of the tension sensor main body are respectively provided with a connecting support arm, and the tension sensor main body and the connecting support arms arranged on the tension sensor main body form an S-shaped structure. In the two connecting support arms, the upper connecting support arm positioned on the upper part is in threaded connection with a trapezoidal screw rod, the trapezoidal screw rod is in threaded fit with a trapezoidal thread rotary cylinder, the trapezoidal thread rotary cylinder rotates under the driving action of a driving motor through a speed reducer and a connecting sleeve, and the trapezoidal screw rod can move in the axis direction. In the two connecting support arms, the lower connecting support arm positioned at the lower part is connected with a lower fixed rod (the lower connecting support arm is connected with the lower fixed rod through a screw), and the tension sensor is fixed through the lower fixed rod during testing, so that the linear motion of the trapezoidal screw rod can apply tension to the main body of the tension sensor, the tension sensor can measure the tension between the speed reducer and the lower fixed rod, and the tension is the tension applied to the traction steel wire rope by the traction steel wire rope tension sensor.
Specifically, the lower fixing rod 3 comprises a flexible connecting rope 7, one end of the connecting rope 7 is fixedly connected with the tension sensor 4, and the other end of the connecting rope 7 is provided with a clamping component used for being clamped to a steel wire rope hole in a support beam of the tractor base. The clamping component can be a metal rod-shaped structure which is convenient to be fixed on the support beam of the tractor base. In another embodiment of the invention, the clamping component can also be a plate structure, which can increase the contact area between the clamping component and the tractor base support beam to reduce the probability of damage to the tractor base support beam or other structures caused by excessive loading force.
In order to improve the reliability of the pressure application result and improve the balance degree of the pulling force when the traction loading device applies the pulling force, the invention provides the following structural optimization: the two groups of traction force loading devices are symmetrically arranged and are respectively arranged at two opposite sides of the traction steel wire rope. The two groups of traction force loading devices can simultaneously apply the same pulling force to the two opposite sides of the traction steel wire rope, so that the traction steel wire rope is kept balanced.
The innovation points and advantages of the invention are as follows: 1. the traction steel wire rope is pulled by pulling the base support beam of the elevator traction machine to apply tension to the traction steel wire rope, so that the loading load of a lift car is simulated; 2. the laser range finder is adopted to detect the displacement change of the traction steel wire rope, the laser range finder is fixed on a section of vertical traction steel wire rope in the machine room and is connected with the signal acquisition display instrument 8, and the signal acquisition display instrument 8 displays the distance measurement data and the tension value. During a static traction test, a laser range finder measures the distance from a fixed point to a ceiling of a machine room at a certain frequency (5Hz-10Hz), and judges whether the traction steel wire rope has displacement change (slides) by checking whether the distance is changed; 3. the upper end of a soft rope is fixed on a tension sensor 4, the lower end of the soft rope is provided with a lower fixed rod 3, the lower fixed rod 3 penetrates through a hole of a steel wire rope and then is fixed, during a static traction test, a connecting screw rod pulls the lower fixed rod 3 through the soft rope, so that tension is applied to a traction steel wire rope, and the lower fixed rod 3 is fixed below a tractor base; 4. according to the Euler formula of the elevator, the traction force loading device is arranged on the traction steel wire rope on the side of the elevator car, so that tension is applied to the heavy end of the elevator system, the tension applied by the traction force loading device can be effectively reduced, and the test requirements can be met. Through the structural design, the traction force loading system is adopted to apply tension to the traction steel wire rope, and weights are not used, so that the problems of high labor intensity, low test efficiency and the like caused by the adoption of a load test in the prior art can be solved.
The no-load static traction test detection device provided by the invention can solve the problems that the static traction test needs to carry weights and wastes time and labor. The invention utilizes the laser range finder fixed on the traction steel wire rope to measure the distance, thereby solving the problem of measuring errors of the slippage displacement of the steel wire rope.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an elevator does not have load static test detection device that tows which characterized in that includes:
the distance measuring equipment (1) is arranged on the traction steel wire rope and is used for measuring the displacement change of the traction steel wire rope;
the traction force loading system is used for applying traction force to a traction steel wire rope, and comprises a clamping block (2) which is used for being installed on the traction steel wire rope, wherein a traction force loading device is fixedly arranged on the clamping block, the traction force loading device is provided with a lower fixing rod (3) which is fixedly arranged relative to a support beam of a base of the traction machine, and a tension sensor (4) which is used for detecting test tension applied by the traction force loading device is arranged on the lower fixing rod.
2. The elevator no-load static traction test detecting device according to claim 1,
the traction force loading device comprises a driving motor (5), a speed reducer (6) is in power connection with the driving motor, the power end of the speed reducer is connected with the tension sensor, and the lower fixing rod is connected with the tension sensor.
3. The elevator no-load static traction test detecting device according to claim 2,
the tension sensor is an S-shaped tension sensor, the upper portion of the tension sensor is connected with a screw rod, the screw rod is connected with the power end of the speed reducer, and the lower portion of the tension sensor is connected with the lower fixing rod.
4. The elevator unloaded static traction test detecting device according to claim 3,
the lower fixing rod comprises a flexible connecting rope (7), one end of the connecting rope is fixedly connected with the tension sensor, and the other end of the connecting rope is used for being clamped to a base support beam of the elevator traction machine.
5. The elevator no-load static traction test detecting device according to claim 2,
the clamping block comprises a clamping plate (9) and a lining block (10), a clamping plate groove for clamping and assembling the lining block is formed in the clamping plate, and an assembling groove for assembling a steel wire rope is formed in the outer side surface of the inner lining block;
the two clamping blocks are arranged oppositely and at intervals, and a clamping and fixing space for clamping the traction steel wire rope is formed between the inner lining blocks arranged on the two clamping blocks;
the inner lining block is replaceable according to the specification and the number of the steel wire ropes, the inner lining block is made of a high polymer composite material, and the two clamping plates are connected through bolts.
6. The elevator unloaded static traction test detecting device according to claim 5,
the clamping plate is provided with a mounting seat, and the speed reducer is fixedly arranged on the mounting seat.
7. The elevator no-load static traction test detecting apparatus according to any one of claims 1 to 6,
the distance measuring equipment is a laser distance measuring instrument, a signal acquisition display instrument (8) is connected with the distance measuring equipment through signals, the signal acquisition display instrument is further connected with the tension sensor and the traction force loading device through signals, and the connection mode is wired or wireless.
8. The elevator no-load static traction test detecting apparatus according to any one of claims 1 to 6,
the traction force loading devices are arranged in two groups, and the two groups of traction force loading devices are symmetrically arranged and are respectively arranged at two opposite sides of the traction steel wire rope.
9. The elevator no-load static traction test detecting device according to claim 1,
the lower fixing rod is of a rod-shaped structure made of hard materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910712539.2A CN110411772B (en) | 2019-08-02 | 2019-08-02 | Elevator no-load static traction test detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910712539.2A CN110411772B (en) | 2019-08-02 | 2019-08-02 | Elevator no-load static traction test detection method and device |
Publications (2)
| Publication Number | Publication Date |
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