Device for elevator test and test method

Abstract

The invention provides an elevator test device and a test method, and belongs to the field of engineering machinery test, the device comprises a tension loading unit, a rotating speed loading unit and a control unit; the tension loading unit is connected with the fixed end of the elevator and is used for applying variable tension to the elevator; and the applied tension is measured by the tension sensor. The rotating speed loading unit is connected with the rotating end of the elevator and is used for driving the elevator to rotate; and the rotating speed and the torque of the elevator are measured by the torque and rotating speed sensor. And the control unit is used for controlling the output of the tension loading unit and the rotating speed loading unit, collecting the measured values of the tension sensor and the torque rotating speed sensor and obtaining the test result of the elevator. According to the device and the method, parameter values of the rotating speed and the torque of the elevator can be tested under different tensile forces, an actual drilling test on a rotary drilling rig is replaced, a reliable basis is provided for testing whether parameters of the elevator meet design requirements or not, and site waste caused by the test can be avoided.

Description

Technical Field

[0001] The invention relates to a device and a test method for a lifter test, belonging to the field of engineering machinery testing. Background Art

[0002] As a very important part of the rotary drill, the lifter is required to keep the upper end of the lifter from rotating while the lower end rotates with the rotary drill power head during actual operation. However, due to the design or assembly of the lifter, the rotation of the lower end of the lifter may not meet the requirements, and may even cause the wire rope at the upper end of the lifter to break and cause damage. At the same time, there are many types of rotary drilling rigs, and there are also many types of corresponding lifters, and the corresponding torque, tension and speed parameters are also different. Therefore, when designing a new type of lifter, it is necessary to conduct a rotation test to check whether the lifter meets the requirements of the on-site equipment and soil structure.

[0003] The existing rotary test is to install the lifter on the rotary drilling rig at the construction site to conduct the actual drilling test. However, in the actual drilling test, in order to meet the site utilization rate, the drilled holes need to be backfilled after multiple drillings, which will incur high backfilling costs and increase production costs. At the same time, during this on-site test, once a problem is found, the lifter, wire rope and the drill rod of the rotary drilling rig need to be disassembled, which will cause a lot of labor waste. In addition, there is only one soil layer structure in a test site, which greatly limits the parameter setting range of the lifter rotary test.

[0004] In summary, the existing lifter rotation test cannot meet the needs of performing rotation tests on lifters of different models under different soil layer structures and different test parameters. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a device and a test method for a lifter test, thereby solving the problem that a lifter rotation test cannot satisfy the requirements for testing lifters of different models.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In the first aspect, the present invention provides a device for testing a lifter, comprising: a tension loading unit, a tension sensor, a rotation speed loading unit, a torque speed sensor and a control unit; the tension loading unit is connected to the fixed end of the lifter, and the direction of the tension generated by the tension loading unit on the lifter is consistent with the axial direction of the lifter, and is used to apply a changing tension to the fixed end of the lifter under a test state; the tension sensor is used to monitor in real time the tension value generated by the tension loading unit on the lifter; the rotation speed loading unit is connected to the rotating end of the lifter, and is used to drive the lifter to rotate under a test state; the torque speed sensor is used to measure the speed and torque of the lifter under a test state; the control unit is respectively connected to the tension loading unit and the rotation speed loading unit signals; the control unit is used to control the outputs of the tension loading unit and the rotation speed loading unit, collect the measurement values ​​of the tension sensor and the torque speed sensor, and obtain and output the test results of the lifter.

[0007] Furthermore, the tension loading unit includes: a tension loading cylinder, a tension guide and a first pin shaft; the tension guide shaft is used to maintain the tension generated by the tension loading cylinder on the lifter in the axial direction of the lifter; the first pin shaft is used to connect the steel wire at the fixed end of the lifter; the tension guide shaft and the tension sensor are installed between the movable end of the tension loading cylinder and the first pin shaft.

[0008] Furthermore, the speed loading unit includes: a second pin shaft, a force-bearing shaft and a driving member; the driving member is used to drive the lifter to rotate; the second pin shaft is used to connect the rotating end of the lifter; the torque speed sensor is installed between the force-bearing shaft and the driving member.

[0009] Furthermore, it also includes: a fixed frame; the fixed frame includes: an upper platform, a lower platform and a supporting column; the upper platform is used to install a tension loading cylinder; the lower platform is used to install a force-bearing shaft; the supporting column is fixedly supported between the upper platform and the lower platform.

[0010] Furthermore, the force-bearing axis includes: a first force-bearing axis and a second force-bearing axis; the second force-bearing axis is fixedly installed on the lower platform of the fixed frame; a detachable pin connection is formed between the lower pin hole of the first force-bearing axis and the second force-bearing axis; the first force-bearing axis is configured with upper pin holes of different models to realize pin connection with different models of lifters.

[0011] Furthermore, the fixed frame also includes: a guide slide rod for the pulling guide member to slide; the guide slide rod and the supporting column are parallel to each other; the pulling guide member is perpendicular to the guide slide rod, and through holes are provided at both ends of the length direction and are sleeved on the guide slide rod; a sliding member is fixed in the through hole so that the pulling guide member can slide along the guide slide rod.

[0012] Furthermore, the fixing frame also includes: an installation auxiliary table and a supporting cylinder; the movable end of the supporting cylinder is hinged to the installation auxiliary table. When installing the lifter to be tested, the lifter is placed on the installation auxiliary table, and under the action of the supporting cylinder, the lifter is moved to the installation location.

[0013] Furthermore, the control unit includes: an operating table, a display and a controller; the display is used to display the speed and torque measured by the torque and speed sensor, the tension value measured by the tension sensor, and the test results of the lifter; the operating table is used to set the required tension value and required speed of the lifter to be tested, as well as the torque parameters of the lifter; the operating table also includes: a speed knob; used to adjust the displacement of the hydraulic motor to achieve the speed at which the speed loading unit drives the lifter to rotate.

[0014] In a second aspect, the present invention provides a method for testing a lifter, using the device for testing a lifter as described in the first aspect, the method comprising: Determine the required pulling force and required speed according to the lifter model and its technical parameters; Control the tension loading unit to apply tension to the lifter, and continuously collect the tension value measured by the tension sensor; In response to the collected tension value being less than the required tension value, controlling the tension applied by the tension loading unit to increase; In response to the collected tension value being greater than the required tension value, controlling the tension applied by the tension loading unit to decrease; In response to the collected tension value being equal to the required tension value, controlling the tension loading unit to maintain the tension unchanged; Control the speed loading unit to drive the lifter to rotate, and continuously collect the speed measured by the torque speed sensor; In response to the collected rotation speed being less than the required rotation speed, controlling the driving force applied by the rotation speed loading unit to increase; In response to the collected rotation speed being greater than the required rotation speed, controlling the driving force applied by the rotation speed loading unit to decrease; In response to the collected rotation speed being equal to the required rotation speed, controlling the rotation speed loading unit to maintain the rotation speed unchanged; In response to the collected pulling force value being equal to the required pulling force value and the collected rotation speed being equal to the required rotation speed; collecting the torque value measured by the current torque rotation speed sensor; By comparing the collected torque value with the torque parameter of the lifter, the test result of the lifter is obtained.

[0015] Furthermore, the test result of the lifter is obtained by comparing the collected torque value with the torque parameter of the lifter, including: calculating the error value between the collected torque value and the torque parameter of the lifter, and in response to the error value being not greater than a preset error threshold, determining that the lifter meets the design requirements; in response to the error value being greater than the preset error threshold, determining that the lifter does not meet the design requirements.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The device provided by the present invention can simulate different tensile loads to test the parameter values ​​of the rotation speed and torque of the lifter, replacing the need to install the lifter on a rotary drilling rig at the construction site for actual drilling tests. This provides a reliable basis for testing whether the parameters of the lifter meet the design requirements and, at the same time, avoids the waste of space caused by the test.

[0017] (2) The device for testing the lifter provided by the present invention can meet the testing needs of various types of lifters by setting different torques to simulate the working environment in different sites and different soil structures, thereby solving the problem of increased costs caused by assembling the entire machine and saving a lot of labor costs and site costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a device for testing a lifter in some embodiments of the present invention; Figure 2 is a schematic diagram of a fixing frame in some embodiments of the present invention; Figure 3 is a front view of an upper platform of a fixing frame in some embodiments of the present invention; Figure 4 is a left view of an upper platform of a fixing frame in some embodiments of the present invention; Figure 5 is a schematic diagram of an auxiliary station in some embodiments of the present invention; Figure 6 is a schematic diagram of a tension loading unit in some embodiments of the present invention; Figure 7 is an enlarged schematic diagram of the tension loading unit A in some embodiments of the present invention; Figure 8 is a schematic diagram of a rotation speed loading unit in some embodiments of the present invention; Fig. 9 is a schematic diagram of the installation of the lifting device in some embodiments of the present invention; Fig.10 is a schematic diagram of the installation of a hydraulic system in some embodiments of the present invention; In the figure: 1-fixed frame; 2-tension loading unit; 3-steel wire; 4-lifter; 5-installation auxiliary table; 6-hydraulic system; 7-speed loading unit; 8-control unit; 101-upper platform; 104-column; 105-lower platform; 1011-upper table; 1012-upper platform column; 1013-guide slide bar; 1014-diagonal brace; 1015-horizontal brace; 201-tension loading cylinder; 204-sleeve one; 205-tension sensor; 206-tension guide; 207-first pin; 210-upper pressure plate; 211-copper sleeve; 212-lower pressure plate; 401-lifter; 402-lifting ring; 403-pin three; 404-pin four; 501 - auxiliary table; 502- pin six; 503- supporting cylinder; 504- pin seven; 505- pin five; 601- hydraulic oil pipe one; 602- hydraulic oil pipe two; 603- hydraulic oil pipe three; 604- hydraulic oil pipe four; 605- pressure pump station; 701- first force-bearing axis; 702- pin eight; 703- second force-bearing axis; 704- locking nut; 705- bushing two; 706- sleeve one; 707- thrust bearing; 708- hydraulic motor; 709- bushing three; 710- torque speed sensor; 711- bolt one; 712- washer one; 713- sleeve two; 714- nut; 715- bolt two; 716- washer two. DETAILED DESCRIPTION

[0019] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Example 1

[0020] The lifter is a kind of lifting device used in drilling. It is a tool used to lift and hang the drill tool when lifting the drill rod and drill tool in geological core drilling. The lifter clamps the drill rod lock joint during the operation of lifting the drill tool to lift and lower the drill tool. There are bearings inside the lifter, and the upper and lower parts can rotate relative to each other. It uses the bearing to rotate the drill rod and prevent the upper end wire from breaking. It is an indispensable and important part of the drilling rig.

[0021] The present invention provides a device for testing a lifter, such as Figure 1 As shown, the device includes: a tension loading unit 2, a rotation speed loading unit 7 and a control unit 8. The tension loading unit 2 is provided with a tension sensor for real-time measurement of the tension applied by the tension loading unit 2 to the lifter 4, and the rotation speed loading unit 7 is provided with a torque speed sensor for real-time measurement of the speed and torque of the lifter 4 driven by the rotation speed loading unit 7.

[0022] Specifically, the tension loading unit 2 is connected to the fixed end of the lifter, and the direction of the tension generated by the tension loading unit 2 on the lifter 4 is consistent with the axial direction of the lifter, and is used to apply a variable tension to the fixed end of the lifter under the test state.

[0023] The rotation speed loading unit 7 is connected to the rotating end of the lifter and is used to drive the lifter 4 to rotate under the test state.

[0024] The control unit 8 is signal-connected to the tension loading unit 2 and the rotational speed loading unit 7 respectively; it is used to control the output of the tension loading unit 2 and the rotational speed loading unit 7, collect the measurement values ​​of the tension sensor and the torque rotational speed sensor, and obtain and output the test results of the puller.

[0025] In some specific embodiments, Figure 6 As shown, the tension loading unit 2 includes: a tension loading cylinder 201 , a tension guide 206 and a first pin 207 .

[0026] Specifically, the tension guide 206 is used to maintain the tension generated by the tension loading cylinder 201 on the lifter 4 in the axial direction of the lifter; the first pin shaft 207 is used to connect the steel wire at the fixed end of the lifter; the tension guide 206 and the tension sensor 205 are installed between the movable end of the tension loading cylinder 201 and the first pin shaft 207.

[0027] In some specific embodiments, Figure 8 As shown, the speed loading unit 7 includes: a second pin shaft, a force bearing shaft and a driving member.

[0028] Specifically, the driving component is a hydraulic motor 708 for driving the lifter to rotate; the second pin shaft is used to connect the rotating end of the lifter 4; and the torque speed sensor 710 is installed between the force-bearing shaft and the hydraulic motor 708.

[0029] In some more specific embodiments, the force-bearing axis includes: a first force-bearing axis 701 and a second force-bearing axis 703 .

[0030] Specifically, the first force-bearing shaft 701 and the second force-bearing shaft 703 are connected by a detachable pin shaft; the first force-bearing shaft 701 is configured with upper pin shaft holes of different models to achieve pin shaft connection with different models of lifters 4.

[0031] Since different types of lifters are configured with different lower pin holes, the force-bearing shaft is divided into two parts, the second force-bearing shaft 703 located at the bottom is used for fixing, and the first force-bearing shaft 701 located at the top can be removed for replacement. Of course, it is necessary to configure multiple first force-bearing shafts 701 that match different types of lifters. This realizes that the device invention can meet the testing work of various types of lifters and has strong versatility.

[0032] In some more specific embodiments, the control unit includes: an operating console, a display, and a controller.

[0033] Specifically, the display is used to display the speed and torque measured by the torque speed sensor, the tension value measured by the tension sensor, and the test results of the lifter. The operating table is used to set the required tension value and required speed of the lifter to be tested, as well as the torque parameters of the lifter; In some more specific embodiments, the operating platform further comprises: a speed knob for adjusting the displacement of the hydraulic motor to adjust the speed at which the speed loading unit drives the lifter to rotate.

[0034] In the case that the controller fails to automatically control the speed of the speed loading unit, the speed of the lifter rotation can be adjusted by the speed knob. Example 2

[0035] On the basis of Embodiment 1, this embodiment provides a fixing frame 1 for fixing the tension loading unit 2 and the rotation speed loading unit 7 .

[0036] like Figure 2 As shown, the fixing frame 1 includes: an upper platform 101, a lower platform 105 and supporting columns 104; the upper platform 101 is connected to four columns 104 through bolts and nuts, and the columns 104 are further connected to the lower platform 105 through bolts and nuts to form the fixing frame 1.

[0037] In some specific embodiments, Figure 3 and Figure 4 As shown, the upper platform 101 includes: an upper table top 1011 , an upper platform column 1012 and a guide slide rod 1013 .

[0038] Specifically, the upper table 1011 is welded to the upper platform column 1012 to fix the tension loading unit 2. The guide slide bar 1013 is welded to the upper table 1011, and the diagonal brace 1014 and the horizontal brace 1015 are welded to the upper table 1011 and the upper platform column 1012 to form the upper platform 101.

[0039] As is known, the lifters equipped on large rotary drilling rigs weigh hundreds of kilograms, which is very inconvenient to install, and the rotation of the lifters during the test will generate a large torque, which requires the test environment to have a high stability. This embodiment provides a stable environment for the lifter test by setting a fixed frame to achieve steady-state fixation of the tension loading unit and the speed loading unit. The steady-state environment also helps to reduce the error of the test, making the test results closer to the actual results.

[0040] In some specific embodiments, Figure 5 As shown, the fixing frame 1 also includes: an installation auxiliary table 5; in the installation auxiliary table 5, the movable end of the supporting cylinder 503 is hinged to the auxiliary table surface 501, and when installing the lifter 4 to be tested, the lifter 4 is placed on the auxiliary table surface 501, and under the action of the supporting cylinder 503, the lifter 4 is moved to the installation location.

[0041] Specifically, the auxiliary table 501 is connected to the fixed frame 1 through a fifth pin 505 , the supporting oil cylinder 503 is connected to the auxiliary table 501 through a sixth pin 502 , and the other end of the supporting oil cylinder 503 is connected to the fixed frame 1 through a seventh pin 504 .

[0042] It should be noted that before the test begins, it is necessary to use the installation auxiliary table to complete the installation of the lifter to be tested, which specifically includes: first, extend and retract the supporting cylinder 503 to make the auxiliary table 501 in a horizontal state, and then place the lifter 401 on the auxiliary table 501; then start the supporting cylinder to support the auxiliary table 501 to an angle of 60°, connect the combination of the steel wire 3 and the lifting ring 402 to the lifter 401 through the pin three 403, and then drive the tension loading cylinder 201 to retract the cylinder stem to pull the lifter 401 to a vertical state, and then connect it to the first force-bearing shaft 701 in the torque loading unit 7 through the pin four 404, thereby completing the installation of the lifter.

[0043] The fixing frame provided in this embodiment not only enables the entire test process to be carried out in a stable environment, but also greatly reduces the difficulty of installing the lifting device by pushing the lifting device to the installation position through the installation auxiliary platform driven by a hydraulic pump. Example 3

[0044] On the basis of Embodiment 2, this embodiment provides an installation structure between the fixed tension loading unit 2 , the rotation speed loading unit 7 and the fixed frame 1 .

[0045] like Figure 6 As shown, the tension loading cylinder 201 is connected to the fixing frame 1 through bolts and nuts, the lower end of the tension loading cylinder 201 is connected to the tension sensor 205 through a sleeve 204, and the other end of the tension sensor 205 is connected to the tension guide 206 through a thread.

[0046] like Figure 7 As shown, two holes are opened at both ends of the pulling guide 206 in the length direction, and two copper sleeves 211 are embedded in the holes at both ends of the pulling guide 206 in the length direction. The upper pressure plate 210 is connected to the pulling guide 206 by bolts and washers, and the lower pressure plate 212 is connected to the pulling guide 206 by bolts and washers. The copper sleeves 211 are fixed, so that the pulling guide slides up and down along the upper platform column 1012.

[0047] like Figure 8 As shown, two thrust bearings 707, a second sleeve 705 and a locking nut 704 are sequentially installed in the second force-bearing shaft 703, which is then installed as a whole in a sleeve 1 706, and is connected to the lower platform of the fixing frame 1 through a second bolt 715 and a second washer 716, and then the first force-bearing shaft 701 is connected to the second force-bearing shaft 703 through a pin shaft 8 702.

[0048] In some specific embodiments, the torque speed sensor 710 is connected to the second force bearing shaft 703 through a flat key, the lower end of the torque speed sensor 710 is connected to the shaft sleeve 3 709 through a flat key, and the lower end of the shaft sleeve 3 709 is connected to the hydraulic motor 708 through a spline groove. The motor 708 is connected to the sleeve 2 713 through bolts and washers, and then the sleeve 2 713 is connected to the sleeve 1 706 through bolts 1 711, washers 1 712 and nuts 714.

[0049] like Fig. 9 As shown, the lifting ring 402 is connected to the lifting device 4 through the pin shaft 3 403, and the lower end of the lifting device 401 is connected to the first force-bearing shaft 701 in the speed loading unit 7 through the pin shaft 404.

[0050] In some improved embodiments, the device further comprises a hydraulic system 6 for supplying oil to the tension loading cylinder and the supporting cylinder.

[0051] Specifically, Fig.10 As shown, hydraulic oil pipe 1 601 is connected to the oil inlet end of the tension loading cylinder 201, hydraulic oil pipe 2 602 is connected to the oil outlet end of the tension loading cylinder 201, and then connected to the pressure pump station 605 through a joint, hydraulic oil pipe 3 603 is connected to the oil inlet end of the support cylinder 503, hydraulic oil pipe 4 604 is connected to the oil outlet end of the support cylinder 503, and then connected to the pressure pump station 605 through a joint. Example 4

[0052] This embodiment provides a method for testing a lifter, which uses the device for testing a lifter as described in any one of embodiments 1 to 3. The method comprises: Step 1: Determine the required pulling force and required speed according to the lifter model and its technical parameters.

[0053] Step 2: First complete the setting of the pulling force required for the lifter test, and then complete the setting of the rotation speed required for the lifter test.

[0054] Among them, completing the setting of the tension required for the lifter test includes: controlling the tension loading unit to apply tension to the lifter, and continuously collecting the tension value measured by the tension sensor, and controlling the tension applied by the tension loading unit by comparing the collected tension value with the required tension value, until the collected tension value is equal to the required tension value, that is, completing the setting of the tension required for the lifter test.

[0055] Specifically, in response to the collected tension value being less than the required tension value, the tension applied by the tension loading unit is controlled to increase; in response to the collected tension value being greater than the required tension value, the tension applied by the tension loading unit is controlled to decrease; in response to the collected tension value being equal to the required tension value, the tension loading unit is controlled to maintain the tension unchanged.

[0056] The setting of the speed required for the lifter test is completed, including: controlling the speed loading unit to drive the lifter to rotate, while continuously collecting the speed measured by the torque speed sensor; controlling the drive applied by the speed loading unit by comparing the collected speed with the required speed until the collected speed is equal to the required speed, that is, completing the setting of the speed required for the lifter test.

[0057] Specifically, in response to the collected rotational speed being less than the required rotational speed, the drive applied by the rotational speed loading unit is controlled to increase; in response to the collected rotational speed being greater than the required rotational speed, the drive applied by the rotational speed loading unit is controlled to decrease; in response to the collected rotational speed being equal to the required rotational speed, the rotational speed loading unit is controlled to maintain the rotational speed unchanged.

[0058] As an emergency measure, when the controller fails to automatically control the speed of the speed loading unit, the speed of the puller can be adjusted by the speed knob, and the speed measured by the torque speed sensor displayed on the display can be observed. When the measured speed reaches the speed required for the test, maintain the rotation of the speed knob to stabilize the rotation speed of the puller at the speed required for the test.

[0059] Step 3: After completing the setting of the pulling force and the required speed for the lifter test; collect the torque value measured by the current torque speed sensor; obtain the test result of the lifter by comparing the collected torque value with the torque parameter of the lifter.

[0060] In some specific embodiments, the collected torque value is compared with the torque parameter of the lifter by calculating the error value between the collected torque value and the torque parameter of the lifter, thereby obtaining the test result of the lifter.

[0061] Specifically, in response to the error value being no greater than 5%, it is determined that the lifter meets the design requirements; in response to the error value being greater than 5%, it is determined that the lifter does not meet the design requirements.

[0062] The test method in this embodiment is a step of testing a certain type of lifter with known factory parameters. For different types of lifters, it is only necessary to determine the required tension value and the required rotation speed based on the lifter model and its technical parameters to simulate different test conditions and meet the testing work of various types of lifters.

[0063] This method not only solves the problem of site waste caused by actual drilling, but also solves the limitation that only one lifter can be tested in one site, and further solves the problem of increased labor costs caused by assembling the whole machine, thereby saving a lot of labor costs and site costs and achieving good testing results.

[0064] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for testing a lifter, characterized in that: include: Tension loading unit, tension sensor, speed loading unit, torque speed sensor and control unit; The tension loading unit is connected to the fixed end of the lifter, and the direction of the tension generated by the unit on the lifter is consistent with the axial direction of the lifter, and is used to apply a variable tension to the fixed end of the lifter under the test state; The tension sensor is used to monitor the tension value generated by the tension loading unit on the lifter in real time; The rotation speed loading unit is connected to the rotating end of the lifter and is used to drive the lifter to rotate under the test state; The torque speed sensor is used to measure the speed and torque of the lifter under the test state; The control unit is respectively connected to the tension loading unit and the rotation speed loading unit by signals; The control unit is used to control the output of the tension loading unit and the rotation speed loading unit, collect the measurement values ​​of the tension sensor and the torque rotation speed sensor, and obtain and output the test results of the lifter.

2. The device for testing a lifter according to claim 1, characterized in that: The tension loading unit comprises: a tension loading cylinder, a tension guide and a first pin shaft; The tension guide is used to maintain the tension generated by the tension loading cylinder on the lifter in the axial direction of the lifter; The first pin is used to connect the steel wire at the fixed end of the lifter; The tension guide and the tension sensor are installed between the movable end of the tension loading cylinder and the first pin shaft.

3. The device for testing a lifter according to claim 2, characterized in that: The speed loading unit comprises: a second pin shaft, a force bearing shaft and a driving member; The driving member is used to drive the lifter to rotate; The second pin is used to connect the rotating end of the lifter; The torque speed sensor is installed between the force bearing shaft and the driving member.

4. The device for testing a lifter according to claim 3, characterized in that: Also includes: Fixed frame; The fixing frame comprises: an upper platform, a lower platform and a supporting column; the upper platform is used to install a tension loading cylinder; the lower platform is used to install a force bearing shaft; the supporting column is fixedly supported between the upper platform and the lower platform.

5. The device for testing a lifter according to claim 4, characterized in that: The force-bearing axis includes: a first force-bearing axis and a second force-bearing axis; the second force-bearing axis is fixedly mounted on the lower platform of the fixing frame; A detachable pin connection is formed between the pin hole below the first force-bearing shaft and the second force-bearing shaft; The first force-bearing shaft is configured with upper pin holes of different models to achieve pin connection with lifters of different models.

6. The device for testing a lifter according to claim 4, characterized in that: The fixing frame further comprises: a guide slide bar for sliding the tension guide member; the guide slide bar is parallel to the supporting column; The pulling force guide is perpendicular to the guide slide bar, and through holes sleeved on the guide slide bar are provided at both ends in the length direction; a sliding member is fixedly installed in the through hole so that the pulling force guide slides along the guide slide bar.

7. The device for testing a lifter according to claim 6, characterized in that: The fixing frame also includes: an auxiliary installation platform and a supporting oil cylinder; the movable end of the supporting oil cylinder is hinged to the auxiliary installation platform. When installing the lifter to be tested, the lifter is placed on the auxiliary installation platform, and under the action of the supporting oil cylinder, the lifter is moved to the installation location.

8. The device for lifting device testing according to claim 1, characterized in that: The control unit includes: an operating console, a display and a controller; The display is used to display the speed and torque measured by the torque speed sensor, the tension value measured by the tension sensor, and the test result of the lifter; The operating table is used to set the required pulling force value and required rotation speed of the lifter to be tested, as well as the torque parameter of the lifter; The operating platform also includes a speed knob for adjusting the displacement of the hydraulic motor to adjust the speed at which the speed loading unit drives the lifter to rotate.

9. A method for testing a lifter, characterized in that: Using the device for testing a lifter as described in any one of claims 1 to 8, the method comprises: Determine the required pulling force and required speed according to the lifter model and its technical parameters; Control the tension loading unit to apply tension to the lifter, and continuously collect the tension value measured by the tension sensor; In response to the collected tension value being less than the required tension value, controlling the tension applied by the tension loading unit to increase; In response to the collected tension value being greater than the required tension value, controlling the tension applied by the tension loading unit to decrease; In response to the collected tension value being equal to the required tension value, controlling the tension loading unit to maintain the tension unchanged; Control the speed loading unit to drive the lifter to rotate, and continuously collect the speed measured by the torque speed sensor; In response to the collected rotation speed being less than the required rotation speed, controlling the driving force applied by the rotation speed loading unit to increase; In response to the collected rotation speed being greater than the required rotation speed, controlling the driving force applied by the rotation speed loading unit to decrease; In response to the collected rotation speed being equal to the required rotation speed, controlling the rotation speed loading unit to maintain the rotation speed unchanged; In response to the collected pulling force value being equal to the required pulling force value and the collected rotation speed being equal to the required rotation speed; collecting the torque value measured by the current torque rotation speed sensor; By comparing the collected torque value with the torque parameter of the lifter, the test result of the lifter is obtained.

10. The lifter testing method according to claim 9, characterized in that: The method of obtaining the test result of the lifter by comparing the collected torque value with the torque parameter of the lifter includes: Calculate the error between the collected torque value and the torque parameter of the lifter. In response to the error value being not greater than a preset error threshold, it is determined that the lifter meets the design requirements; In response to the error value being greater than a preset error threshold, it is determined that the lifter does not meet the design requirements.

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