A testing device for elevator rope pulleys

Abstract

This invention discloses a testing device for elevator sheaves, comprising: a testing bracket, on which an elevator sheave to be tested is mounted via an elevator sheave shaft on the upper part of the testing bracket, the elevator sheave having a plurality of rope grooves; a plurality of test ropes for performing static pressure tests on the elevator sheave, these test ropes bypassing the corresponding rope grooves of the elevator sheave and contacting the corresponding rope grooves of the elevator sheave; a load monitoring device connected to one end of all the test ropes; and a load application device connected to the other end of all the test ropes. This invention can perform static pressure tests on elevator sheaves of various specifications and can be flexibly transported to various environments for testing, overcoming the shortcomings of existing technologies that are inconvenient to use and unable to simulate the pressure load of wire ropes on sheaves under real-world scenarios.

Description

Technical Field

[0001] This invention relates to the field of elevator sheave testing, and more specifically to a testing device for elevator sheaves. Background Technology

[0002] Traction elevators typically have multiple return rope pulleys or guide pulleys (collectively referred to as elevator rope pulleys in this article). Originally, these elevator rope pulleys were mostly made of metal. However, in order to save costs, conserve energy and reduce emissions, and to replace traditional materials with new ones, nylon has increasingly been used to replace these elevator rope pulleys.

[0003] To verify whether the performance of elevator rope pulleys made of nylon or non-nylon materials meets the usage requirements, a series of tests need to be conducted, especially the preliminary tests on their mechanical properties. Typical test methods include static pressure tests, as well as tests on compressive strength, impact, pull-out, and aging under various environmental factors such as high and low temperatures, humidity, salt spray, and even light of various wavelengths.

[0004] The conventional method for static pressure testing is to place the elevator sheave on a universal testing machine for compression testing. However, universal testing machines are large and have many components, so the tests can only be conducted in a temperature-controlled laboratory and cannot be moved to a multi-functional, harsh environment chamber. Performing this test on a universal testing machine also requires complex fixtures.

[0005] To ensure accurate testing, it is necessary to fabricate concave metal pressure blocks of the same pitch diameter and use them in conjunction with round steel bars bent to the same pitch diameter to simulate steel wire rope. On the other hand, when elevator sheaves are subjected to the pressure of steel wire rope, the pressure value varies at different locations within the same groove. Using a universal testing machine and fixture pressure blocks cannot simulate the pressure load of steel wire rope on the sheave in a real-world scenario.

[0006] Therefore, it is necessary to design a testing device for elevator sheaves that can perform static pressure tests on elevator sheaves of various specifications and can be flexibly transported to various environments for testing. Summary of the Invention

[0007] To overcome the aforementioned shortcomings of the prior art, the present invention aims to provide a testing device for elevator sheaves. This device overcomes the limitations of existing technologies, such as inconvenience in use and the inability to simulate the pressure load of wire ropes on the sheaves under real-world conditions.

[0008] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0009] A testing device for elevator sheaves includes:

[0010] A test stand, wherein an elevator sheave to be tested is mounted on the upper part of the test stand via an elevator sheave shaft, and the elevator sheave is provided with several rope grooves;

[0011] Several test ropes are used to perform static pressure tests on the elevator sheave. These test ropes pass around the corresponding groove of the elevator sheave and contact the corresponding groove of the elevator sheave.

[0012] A load monitoring device connected to one end of all test ropes;

[0013] A force application device connected to the other end of all test ropes.

[0014] In a preferred embodiment of the present invention, the test bracket includes a pair of uprights, a pair of crossbeams, a pair of bottom beams, an upper support plate, and a lower support plate. The pair of bottom beams are arranged in parallel intervals. The bottom of each upright is fixed to the corresponding bottom beam and arranged in parallel intervals. An elevator sheave shaft groove is provided at the top of each upright. During testing, the two ends of the elevator sheave shaft rest in the elevator sheave shaft groove of the pair of uprights, so that the elevator sheave is positioned between the upper parts of the pair of uprights. Each crossbeam is fixed at the middle position of the corresponding upright and arranged in parallel intervals. The two ends of an upper support plate are fixedly connected to the upper part of the pair of uprights, and the two ends of a lower support plate are fixedly connected to the lower part of the pair of uprights.

[0015] In a preferred embodiment of the present invention, each column and its corresponding base beam are arranged in an inverted T-shape.

[0016] In a preferred embodiment of the present invention, the loading force detection device includes at least one upper connecting component, at least one tension sensor, at least one lower connecting component, and a tension sensor display. One end of the upper connecting component is connected to one end of the test rope, and the other end of the upper connecting component is fixedly connected to the tension sensor. One end of the lower connecting component is fixedly connected to the tension sensor, and the other end of the lower connecting component is fixedly connected to one end of the pair of crossbeams. The tension sensor display is signal-connected to the tension sensor to display the tension data tested by the tension sensor.

[0017] In a preferred embodiment of the present invention, the tension sensor display is installed at a location on any column that is easy to observe.

[0018] In a preferred embodiment of the present invention, the upper connecting component includes an upper U-shaped connector, an upper bolt, and a rope-hanging shaft. A rope-hanging shaft through hole is provided on each of the pair of vertical arms of the upper U-shaped connector, and a bolt through hole is provided on the horizontal part of the upper U-shaped connector. One end of each test rope connected to the loading force monitoring device is anchored into a first rope loop by a first anchor. After the rope-hanging shaft passes through the first rope loop on the test rope, both ends pass through the rope-hanging shaft through holes on the pair of vertical arms of the upper U-shaped connector, and the upper bolt passes through the bolt through hole on the horizontal part of the upper U-shaped connector and is connected to the tension sensor.

[0019] In a preferred embodiment of the present invention, the upper bolt passes through the bolt hole on the horizontal part of the upper U-shaped connector and is then tightened by an upper nut.

[0020] In a preferred embodiment of the present invention, the upper connecting component is a first riveting rod, one end of the first riveting rod is fixedly connected to the end of the test rope connected to the loading force monitoring device, and the other end of the first riveting rod is fixedly connected to the tension sensor.

[0021] In a preferred embodiment of the present invention, an anti-rotation clamping point is provided at one end of the first riveting rod, and a thread is provided at the other end of the first riveting rod, so that the other end of the first riveting rod is fixedly connected to the tension sensor by the thread.

[0022] In a preferred embodiment of the present invention, the lower connecting component includes an upper pull rod, a lower pull rod, and a base plate. One end of the upper pull rod is fixedly connected to the tension sensor, the other end of the lower pull rod is hinged to one end of the lower pull rod, the other end of the lower pull rod is fixedly connected to the base plate, and the base plate is fixedly connected to one end of the pair of crossbeams.

[0023] In a preferred embodiment of the present invention, the pull rod includes a lower U-shaped connector, a screw, and a pull rod shaft. A first pull rod shaft through hole is provided on each of the pair of vertical arms of the lower U-shaped connector. One end of the screw is fixed on the horizontal arm of the lower U-shaped connector, and the other end of the screw passes through the screw hole on the base plate and is locked by a nut. A second pull rod shaft through hole is also provided on the other end of the upper pull rod. After the pull rod shaft passes through the second pull rod shaft through hole on the upper pull rod, both ends pass through the first pull rod shaft through holes on the pair of vertical arms of the lower U-shaped connector, respectively.

[0024] In a preferred embodiment of the present invention, the pull rod includes a lower U-shaped connector and a pull rod shaft. A first pull rod shaft through hole is provided on each of the pair of vertical arms of the lower U-shaped connector. The horizontal arm of the lower U-shaped connector is fixedly connected to the base plate. A second pull rod shaft through hole is also provided on the other end of the upper pull rod. After the pull rod shaft passes through the second pull rod shaft through hole on the upper pull rod, both ends pass through the first pull rod shaft through holes on the pair of vertical arms of the lower U-shaped connector, respectively.

[0025] In a preferred embodiment of the present invention, the loading force application device includes a plurality of rope end rods, a loading force application component, and a receiving component; the other end of each test rope connected to the loading force application device is anchored into a second rope loop by a second anchor; one end of each rope end rod has a loop, which is fitted onto the second rope loop; all the rope end rods are fixedly connected to the receiving component; the loading force application component rests on the receiving component; and tension is applied to the test rope through the receiving component and the rope end rods.

[0026] In a preferred embodiment of the present invention, the receiving component includes a carrying beam, a carrying beam cover plate, two small ball heads, and two sets of rope head fixing components. A small ball head hole is provided at each end of the carrying beam, and a small ball head screw through hole is provided at each end of the carrying beam cover plate. Each small ball head has a small ball head and a small ball head screw connected to that ball head. The carrying beam cover plate is fixed to the bottom of the carrying beam, and the small ball head holes on the carrying beam are aligned one-to-one with the small ball head screw through holes on the carrying beam cover plate. The small ball heads of the two small ball heads are placed in the corresponding small ball head holes on the carrying beam, and the small ball head screws of the two small ball heads pass through the small ball head screw through holes on the carrying beam cover plate and are respectively fixed to the two sets of rope head fixing components. All rope head pull rods are fixedly connected to the two sets of rope head fixing components in an equal or non-equal division manner. The loading force applying component is fixed to the carrying beam.

[0027] In a preferred embodiment of the present invention, the loading force applying component includes a loading force applying base plate, a loading force applying cover plate, a large ball head, and two hexagon socket head cap screws; the loading force applying base plate has a large ball head hole and two hexagon socket head cap screw holes, and the loading force applying cover plate has a first large ball head screw hole and two first internal thread holes; the loading force applying cover plate is disposed on the bottom surface of the loading force applying base plate such that the large ball head hole and the two hexagon socket head cap screw holes on the loading force applying base plate respectively connect with the large ball head screw hole and the two hexagon socket head cap screw holes on the loading force applying cover plate. The first internal threaded holes are aligned one by one. Two hexagon socket bolts pass through the two hexagon socket bolt holes on the loading force application base plate and are screwed into the two first internal threaded holes on the loading force application cover plate, so that the loading force application cover plate is fixed on the bottom surface of the loading force application base plate. The large ball head has a large ball head and a large ball head screw connected to the large ball head. The large ball head is placed in the large ball head hole on the loading force application base plate. The large ball head screw passes through the first large ball head screw hole on the loading force application cover plate and is fixed to the spreader beam and the spreader beam cover plate.

[0028] In a preferred embodiment of the present invention, the weight of the base plate to which the loading force is applied can be selected as needed, and the tension of the test rope can be adjusted by selecting the weight of the base plate to which the loading force is applied.

[0029] In a preferred embodiment of the present invention, a second large ball-end screw hole is provided on the spreader beam, and a second internal threaded hole is provided on the spreader beam cover plate. The large ball-end screw of the large ball-end screw passes through the first large ball-end screw hole on the load-applying cover plate, then passes through the second large ball-end screw hole on the spreader beam, and then screws into the second internal threaded hole on the spreader beam cover plate, so that the large ball-end screw of the large ball-end screw is fixedly connected to the spreader beam and the spreader beam cover plate.

[0030] In a preferred embodiment of the present invention, each set of rope end fixing components includes a rope end base plate, a rope end cover plate, and at least one spherical collar. At least one spherical hole is formed on the rope end base plate, and a spherical collar through-hole is formed on the rope end cover plate. The spherical collar has a spherical head and a columnar portion, and a rope end through-hole is located within the spherical collar. The rope end base plate is fixed to the bottom surface of the rope end base plate, such that the spherical hole on the rope end base plate is aligned with the spherical collar through-hole on the rope end cover plate. The spherical head of the spherical collar rests within the spherical hole, and the columnar portion of the spherical collar is inserted into the spherical collar through-hole on the rope end cover plate. The rope end pull rod passes through the corresponding spherical hole, rope end through-hole, and spherical collar through-hole and is then locked, thereby fixing the rope end base plate, rope end cover plate, and spherical collar together.

[0031] In a preferred embodiment of the present invention, a threaded section of the rope head is provided at the lower part of the rope head pull rod. The threaded section of the rope head pull rod passes through the corresponding spherical hole, the rope head through hole and the spherical collar through hole and is then locked by a pull rod nut screwed on the threaded section of the rope head pull rod.

[0032] In a preferred embodiment of the present invention, the loading force application component includes a rope end plate and a plurality of loading springs; a second riveting rod is anchored at the other end of the test rope connected to the loading force application component, an anti-rotation clamping point is provided at one end of the second riveting rod, and a thread is provided at the other end of the first riveting rod; the rope end plate is fixed to the other end of the pair of crossbeams and has a plurality of riveting rod through holes; the threaded end of the second riveting rod passes through the corresponding riveting rod through hole and the corresponding loading spring on the rope end plate, and is locked by at least one riveting rod nut screwed on the thread of the second riveting rod; the tension of the test rope can be adjusted by adjusting the compression degree of the loading spring by adjusting the riveting rod nut; one end of the loading spring contacts the rope end plate, and the other end of the loading spring contacts the riveting rod nut.

[0033] In a preferred embodiment of the present invention, the loading force applying component further includes a plurality of upper spring cover plates and a plurality of lower spring cover plates. Each upper spring cover plate and each lower spring cover plate are respectively sleeved on both ends of each loading spring. The threaded end of the second riveting rod passes through the corresponding riveting rod through hole on the rope end plate, the inner hole of the corresponding upper spring cover plate, the corresponding loading spring, and the inner hole of the corresponding lower spring cover plate, and is then locked by at least one riveting rod nut screwed onto the thread of the second riveting rod. One end of the upper spring cover plate contacts the rope end plate, and the upper spring cover plate contacts the riveting rod nut.

[0034] The beneficial effects of this invention are as follows:

[0035] This invention can perform static pressure tests on rope pulleys of various specifications and can be flexibly transported to various environments for testing, overcoming the shortcomings of existing technologies that are inconvenient to use and unable to simulate the pressure load of wire ropes on rope pulleys under real-world scenarios. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0037] Figure 2 This is a partial structural diagram (support) of the present invention.

[0038] Figure 3 This is a partial structural schematic diagram (steel wire rope) of Embodiment 1 of the present invention.

[0039] Figure 4 This is a partial structural diagram of Embodiment 1 of the present invention (load monitoring device).

[0040] Figure 5 This is a partial structural schematic diagram of Embodiment 1 of the present invention (tension balancing device).

[0041] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention.

[0042] Figure 7 This is a partial structural schematic diagram (steel wire rope) of Embodiment 2 of the present invention.

[0043] Figure 8 This is a partial structural schematic diagram of Embodiment 2 of the present invention (load monitoring device).

[0044] Figure 9 This is a partial structural schematic diagram of Embodiment 2 of the present invention (elastic rope end device). Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, in the following descriptions, well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the invention.

[0046] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] The rope pulleys referred to in this invention include, but are not limited to, return rope pulleys or guide pulleys made of nylon or non-nylon materials.

[0048] like Figure 1-9 The elevator sheave test apparatus shown includes a bracket 100 for mounting other components.

[0049] Key points combined Figure 2 The bracket 100 includes columns 111 and 112, which are assembled by upper and lower support plates 121 and 122.

[0050] The two crossbeams 131 and 132 are installed at the same height on the columns 111 and 112, respectively.

[0051] Bottom beams 141 and 142, arranged in a T-shape with the left and right uprights 111 and 112, are welded to the ends of the uprights 111 and 112. Bottom beams 141 and 142 serve as the supporting base for the entire bracket 100. Bottom beams 141 and 142 are arranged in parallel at intervals, and the bottoms of the uprights 111 and 112 are fixed to the corresponding bottom beams 141 and 142 and arranged in parallel at intervals.

[0052] Elevator sheave shaft grooves are provided on the upper part of the columns 111 and 112 of the bracket 100. During the test, the two ends of the elevator sheave shaft 210 are placed in the elevator sheave shaft grooves of the pair of columns 111 and 112, so that the elevator sheave shaft 210 is placed between the upper parts of the pair of columns 111 and 112.

[0053] Each crossbeam 131, 132 is fixed at the middle position of the corresponding column 111, 112 and arranged in parallel at intervals. The two ends of an upper support plate 121 are fixedly connected to the upper part of a pair of columns 111, 112 respectively, and the two ends of a lower support plate 122 are fixedly connected to the lower part of a pair of columns 111, 112 respectively.

[0054] Several test ropes 230 used for static pressure testing of elevator sheave 220 pass around the corresponding groove of elevator sheave 220 and come into contact with the corresponding groove of elevator sheave 220.

[0055] The load monitoring device referred to in this invention can be further divided into a first load force monitoring device 300 as shown in Embodiment 1 and a second load force monitoring device 500 as shown in Embodiment 2.

[0056] The steel wire rope referred to in this invention can be further divided into the test rope 230 of Example 1 and the steel wire rope 240 of Example 2.

[0057] Key points combined Figure 1 In Example 1, one end of the test rope 230 is provided with a first loading force monitoring device 300 to apply axial pressure to it, and the other end of the test rope 230 is provided with a first loading force application device 400 to adjust its tension.

[0058] Key points combined Figure 1 , 3 The test rope 230 is connected to the first load monitoring device 300 or the first load application device 400 by folding and setting anchors 231 at both ends to form the first rope loop.

[0059] The first loading force monitoring device 300 is connected to the first end of the test rope 230 via the upper U-shaped connector 310.

[0060] The upper U-shaped connector 310 has a rope shaft through hole on each of its two vertical arms, and a bolt through hole on the horizontal part of the upper U-shaped connector 310.

[0061] Specifically, the hanging rope shaft 311 of the upper U-shaped connector 310 passes through the first loop of the riveted test rope 230, the hanging rope shaft 311 is installed on the hanging rope shaft through hole of the upper U-shaped connector 310, and is fixed by a cotter pin 312.

[0062] The upper U-shaped connector 310 is connected to the upper end of the tension sensor 320 via bolts 313 and nuts 314. Bolt 313 passes through a bolt hole.

[0063] The lower end of the tension sensor 320 is connected to an upper pull rod 331. The upper pull rod 331 and the lower pull rod 332 are mounted through a pull rod shaft 333 and a cotter pin 334 to form a hinge, so as to ensure that the tension sensor 320 only bears axial tension.

[0064] The lower U-shaped connector 336 of the pull rod 332 has through holes for mounting the pull rod shaft 333 on each of its two vertical arms. One end of the screw 337 of the pull rod 332 is fixed to the horizontal arm of the lower U-shaped connector 336, and the other end of the screw 337 passes through the screw hole on the base plate 340 and is locked by the lower nut 335. A second pull rod shaft through hole is also provided on the other end of the upper pull rod 331. After the pull rod shaft 333 passes through the second pull rod shaft through hole on the upper pull rod 331, both ends pass through the first pull rod shaft through holes on the pair of vertical arms of the lower U-shaped connector 336, respectively.

[0065] The base plate 340 is fixed to the crossbeams 131 and 132 by bolt assembly 341 (e.g.) Figure 1 As shown, tightening the lower nut 335 at the end of the pull rod 332 will move the pull rod 332 downwards to tighten the test rope 230. Adjusting the lower nut 335 will adjust the axial tension of the test rope 230, thereby adjusting the static pressure load on the elevator pulley 220. The load magnitude can be viewed in real time through the sensor display 321. The sensor display 32 is connected to the tension sensor 320 to display the tension data tested by the tension sensor 320. The tension sensor 320 can be installed in any easily observable location on the column.

[0066] Key points combined Figure 5 The first loading force application device 400 of Embodiment 1 includes a plurality of rope end levers 410 connected in series with the second end of the test rope 230. One end of each rope end lever 410 has a loop, which is fitted onto the second loop formed at the second end of the test rope 230.

[0067] The end of the rope head lever 410 passes through the two-hole rope head plate 420 or the three-hole rope head plate 430 and is locked by the lever nut 450. The two-hole rope head plate 420 or the three-hole rope head plate 430 are two sets of rope head fixing components.

[0068] A spreader beam structure 440 is provided on the upper part of the two-hole rope head plate 420 or the three-hole rope head plate 430.

[0069] The spreader beam structure 440 further includes a spreader beam 442 disposed above the small ball head 441 and a spreader beam cover plate 443 disposed below it. The spreader beam 442 is provided with a hemispherical blind hole 442a that contacts the spherical surface of the small ball head 441.

[0070] The end of the small ball head 441 passes between the two holes of the two-hole rope head plate 420 or between the three holes of the three-hole rope head plate 430.

[0071] By placing the small ball head 441 at the aforementioned position, the constraints on the relevant degrees of freedom are reduced, achieving a "seesaw" effect. According to the force balance equation, when the forces at both ends of the two-hole rope end plate 420 are unequal, the two-hole rope end plate 420 "tilts" towards the side with the greater force, causing the test rope 230 on that side to "loosen" and reducing the axial tension inside the test rope 230, until the forces at both ends of the two-hole rope end plate 420 are equal, that is, the tension of the two test ropes 230 is the same, thus achieving mutual balance of the wire rope tension.

[0072] Similarly, the three-hole rope head plate 430 installs the small ball head 441 in the middle of the three holes, making the distance between it and the three holes equal, thus achieving automatic tension balance of the three test ropes 230.

[0073] A base plate structure 460 is provided on the upper part of the spreader beam structure 440. A large ball head 461 is provided in the base plate structure 460. The end of the large ball head 461 passes through the position between several small ball heads 441 to achieve tension balance between different test ropes 230.

[0074] The base plate structure 460 includes a loading force applying base plate 462 disposed on the upper part of the large ball head 461 and a loading force applying cover plate 463 disposed on the lower part. The loading force applying base plate 462 is provided with a large ball head hole 462a that contacts the spherical surface of the large ball head 461.

[0075] A large ball head hole 462a and two internal hex bolt holes 462b are provided on the load application base plate 462, and a first large ball head screw hole 463a and two first internal thread holes 463b are provided on the load application cover plate 463.

[0076] The load application cover plate 463 is set on the bottom surface of the load application base plate 462, and the large ball head hole 462a and the two internal hex bolt through holes 462b on the load application base plate 462 are respectively aligned with the first large ball head screw through hole 463a and the two first internal thread holes 463b on the load application cover plate 463.

[0077] Two hexagon socket bolts 464 pass through two hexagon socket bolt holes 462b on the load application base plate 462 and are screwed into two first internal thread holes 463b on the load application cover plate 463, so that the load application cover plate 463 is fixed on the bottom surface of the load application base plate 462.

[0078] The large ball head 461 has a large ball head and a large ball head screw connected to the large ball head. The large ball head is placed in the large ball head hole 462a on the load application base plate 462. The large ball head screw passes through the first large ball head screw through hole 463a on the load application cover plate 463 and is then fixed to the spreader beam 442 and the lower spreader beam cover plate 443.

[0079] The weight of the base plate 462 to which the loading force is applied can be selected as needed, and the tension of the test rope can be adjusted by selecting the weight of the base plate 462 to which the loading force is applied.

[0080] The spreader beam 442 has a second large ball head screw through hole 442b, and the spreader beam cover plate 443 has a second hollow threaded hole 443a.

[0081] After the large ball head screw of the large ball head 461 passes through the first large ball head screw through hole 463a on the load-applying cover plate 463, it passes through the second large ball head screw through hole 442b on the spreader beam 442 and is screwed into the second internal hollow threaded hole 443a on the spreader beam cover plate 443, so that the large ball head screw of the large ball head 461 is fixedly connected to the spreader beam 442 and the spreader beam cover plate 443.

[0082] According to the force balance equation, by reasonably setting the distance between the hemispherical blind holes 442a at both ends of the spreader beam 442 and the large ball head 461 in the middle, the spreader beam 442 can be made so that the tension of the two test ropes 230 at one end is the same as the internal tension of the three test ropes 230 at the other end. This ensures that the internal tension of all five wire ropes is equal.

[0083] Furthermore, through the reasonable combination and deformation design of the two-hole rope end plate 420 or the three-hole rope end plate 430, the automatic tension balancing function of 2 to 9 wire ropes can be achieved. This covers the groove count of most elevator nylon wheels, so the device of this invention can basically test nylon wheels of various specifications.

[0084] The two holes of the two-hole rope head plate 420 are hemispherical through holes and are equipped with spherical collars 421. Specifically, the spherical collars 421 are positioned between the two-hole rope head bottom plate 422 and the two-hole rope head cover plate 423.

[0085] The three holes of the three-hole rope end plate 430 are hemispherical through holes and are provided with spherical collars 431. Specifically, the spherical collars 431 are set between the three-hole rope end base plate 432 and the three-hole rope end cover plate 433.

[0086] The design of the spherical collar 421 or 431 allows the rope end lever 410 to rotate within the hemispherical through hole to a certain extent, ensuring that when the two-hole rope end plate 420 or the three-hole rope end plate 430 is tilted, the force applied by the lever nut 450 at the lower end of the rope end lever 410 to the spherical collar 421 or 431 is always a positive pressure. That is, the force at both ends of the two-hole rope end plate 420 or the three-hole rope end plate 430 is axial to the test rope 230 and is independent of the tilt angle of the two-hole rope end plate 420 or the three-hole rope end plate 430.

[0087] The above methods ensure that the test rope 230 and the rope end rod 410 are only subjected to axial tension, thus improving the accuracy of balancing the tension of each test rope 230.

[0088] During testing, after installing the test rope 230, the first loading force monitoring device 300, and the first loading force application device 400, a micro-deformation monitoring device for the elevator rope wheel 220 (not shown in the figure) should be installed at an appropriate position on the elevator rope wheel 220. A dial indicator is usually used for monitoring.

[0089] Fix the dial indicator to the test frame, gently touch the probe to the position to be monitored, return the pointer of the dial indicator to zero, and then adjust the lower nut 335 below the pull rod 332 to slowly tension the test rope 230. Observe the value on the display 321 until the predetermined load is reached.

[0090] By observing the changes in the dial indicator pointer, the subtle deformation of the elevator sheave 220 under pressure can be monitored.

[0091] After the preset time has elapsed, slowly loosen the lower nut 335 of the pull rod 332 to unload the load.

[0092] By periodically observing the changes in the dial indicator pointer and using a certain algorithm, the rebound performance data of the elevator sheave 220 after unloading can be calculated.

[0093] By transporting the device of the present invention to different environments or placing it in an environmental chamber with preset specific parameters for testing, static pressure performance data and rebound performance data under various environmental parameters can be obtained.

[0094] Key points combined Figure 6In Embodiment 2, one end of the wire rope 240 is connected to a second loading force monitoring device 500 that applies axial pressure to it via a first riveting rod 242 with an anti-rotation clamping point 241 for fastening, and the other end of the wire rope 240 is connected to a loading force applying component 600 that adjusts its tension via a second riveting rod 244 with a clamping surface 243.

[0095] Key points combined Figure 8 The second loading force monitoring device 500 includes several tension sensors 510 connected in series with the first end of the wire rope 240. The lower end of the tension sensor 510 is connected to the tie rod seat 530 fixed on the support beams 131 and 132 via an upper tie rod 520. Specifically, the end of the upper tie rod 520 is fixed to the tie rod shaft 531 of the tie rod seat 530 and is provided with a cotter pin 532.

[0096] Key points combined Figure 9 The loading force application component 600 includes a plurality of loading springs 610 connected in series with the second end of the wire rope 240. The plurality of loading springs 610 pass through the rope head plate 620 and are limited by the upper spring cover plate 630. The ends of the plurality of loading springs 610 are connected to the riveting tie rod nut 650 through the lower spring cover plate 640. The elastic tension of the loading springs 610 is adjusted by the riveting tie rod nut 650 so that the tension of the corresponding wire rope 240 reaches the preset load.

[0097] Each upper spring cover plate 630 and each lower spring cover plate 640 are respectively fitted onto both ends of each loading spring 610. The threaded end of the second riveting rod 244 passes through the corresponding riveting rod through hole on the rope head plate 620 and the inner hole of the corresponding upper spring cover plate 630.

[0098] After the corresponding loading spring 610 and the inner hole of the corresponding lower spring cover plate 640 are connected, they are locked by at least one riveting rod nut 650 screwed onto the thread of the second riveting rod 244. One end of the upper spring cover plate 630 is in contact with the rope head plate 620, and the upper spring cover plate 630 is in contact with the riveting rod nut 650.

[0099] Similar to Example 1, the testing device in this example also needs to be equipped with a dial indicator in order to monitor the minute deformation data of the elevator sheave 220.

[0100] Similar to Example 1, this example can be transported to different environments or placed in an environmental chamber with preset specific parameters for testing, thereby obtaining static pressure performance data and rebound performance data under various environmental parameters.

[0101] The foregoing has shown and described the basic principles and main features of the invention and the advantages of the invention.

[0102] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A testing device for elevator rope pulleys, characterized in that, include: A test stand, wherein an elevator sheave to be tested is mounted on the upper part of the test stand via an elevator sheave shaft, and the elevator sheave is provided with several rope grooves; Several test ropes are used to perform static pressure tests on the elevator sheave. These test ropes pass around the corresponding groove of the elevator sheave and contact the corresponding groove of the elevator sheave. A load monitoring device connected to one end of all test ropes; A force application device connected to the other end of all test ropes; The test support includes a pair of uprights, a pair of crossbeams, a pair of bottom beams, an upper support plate, and a lower support plate. The pair of bottom beams are arranged in parallel intervals. The bottom of each upright is fixed to the corresponding bottom beam and arranged in parallel intervals. An elevator sheave shaft groove is provided at the top of each upright. During testing, the two ends of the elevator sheave shaft rest in the elevator sheave shaft groove of the pair of uprights, so that the elevator sheave is placed between the upper parts of the pair of uprights. Each crossbeam is fixed in the middle of the corresponding upright and arranged in parallel intervals. The two ends of an upper support plate are fixedly connected to the upper part of the pair of uprights, and the two ends of a lower support plate are fixedly connected to the lower part of the pair of uprights. The loading force application device includes several rope end rods, a loading force application component, and a receiving component; the other end of each test rope connected to the loading force application device is anchored into a second rope loop by a second anchor; one end of each rope end rod has a loop, which is fitted onto the second rope loop; all the rope end rods are fixedly connected to the receiving component; the loading force application component rests on the receiving component; and tension is applied to the test rope through the receiving component and the rope end rods. The receiving component includes a carrying pole beam, a carrying pole beam cover plate, two small ball heads, and two sets of rope head fixing components. A small ball head hole is provided at each end of the carrying pole beam, and a small ball head screw through hole is provided at each end of the carrying pole beam cover plate. Each small ball head has a small ball head and a small ball head screw connected to that ball head. The carrying pole beam cover plate is fixed to the bottom of the carrying pole beam, and the small ball head holes on the carrying pole beam are aligned one-to-one with the small ball head screw through holes on the carrying pole beam cover plate. The small ball heads of the two small ball heads are placed in the corresponding small ball head holes on the carrying pole beam, and the small ball head screws of the two small ball heads pass through the small ball head screw through holes on the carrying pole beam cover plate and are respectively fixed to the two sets of rope head fixing components. All rope head rods are fixedly connected to the two sets of rope head fixing components in an equal or non-equal division manner. The loading force applying component is fixed to the carrying pole beam. The force application component includes a force application base plate, a force application cover plate, a large ball head, and two hexagon socket head cap screws. The force application base plate has a large ball head hole and two hexagon socket head cap screw holes. The force application cover plate has a first large ball head screw hole and two first internal thread holes. The force application cover plate is disposed on the bottom surface of the force application base plate, such that the large ball head hole and the two hexagon socket head cap screw holes on the force application base plate respectively connect with the large ball head screw hole and the two first internal thread holes on the force application cover plate. Aligned one by one, two hexagonal socket head cap screws pass through the two hexagonal socket head cap holes on the load-applying base plate and are screwed into the two first internal thread holes on the load-applying cover plate, thereby fixing the load-applying cover plate to the bottom surface of the load-applying base plate; the large ball head has a large ball head and a large ball head screw connected to the large ball head, the large ball head is placed in the large ball head hole on the load-applying base plate, and the large ball head screw passes through the first large ball head screw hole on the load-applying cover plate and is fixed to the spreader beam and the spreader beam cover plate.

2. The elevator rope sheave testing device as described in claim 1, characterized in that, Each column is arranged in an inverted T-shape with its corresponding bottom beam.

3. The elevator rope sheave testing device as described in claim 1, characterized in that, The loading force detection device includes at least one upper connecting component, at least one tension sensor, at least one lower connecting component, and a tension sensor display. One end of the upper connecting component is connected to one end of the test rope, and the other end of the upper connecting component is fixedly connected to the tension sensor. One end of the lower connecting component is fixedly connected to the tension sensor, and the other end of the lower connecting component is fixedly connected to one end of the pair of crossbeams. The tension sensor display is signal-connected to the tension sensor to display the tension data tested by the tension sensor.

4. The elevator rope sheave testing device as described in claim 3, characterized in that, The tension sensor display is installed at any easily observable location on any column.

5. The elevator rope sheave testing device as described in claim 3, characterized in that, The upper connecting component includes an upper U-shaped connector, an upper bolt, and a rope-hanging shaft. A rope-hanging shaft through hole is provided on each of the two vertical arms of the upper U-shaped connector, and a bolt through hole is provided on the horizontal part of the upper U-shaped connector. One end of each test rope connected to the loading force monitoring device is anchored into a first rope loop by a first anchor. After the rope-hanging shaft passes through the first rope loop on the test rope, both ends pass through the rope-hanging shaft through holes on the two vertical arms of the upper U-shaped connector, and the upper bolt passes through the bolt through hole on the horizontal part of the upper U-shaped connector and is connected to the tension sensor.

6. The elevator rope sheave testing device as described in claim 5, characterized in that, The upper bolt passes through the bolt hole on the horizontal part of the upper U-shaped connector and is then tightened by an upper nut.

7. The elevator rope sheave testing device as described in claim 3, characterized in that, The upper connecting component is a first riveting rod. One end of the first riveting rod is fixedly connected to the end of the test rope that is connected to the loading force monitoring device, and the other end of the first riveting rod is fixedly connected to the tension sensor.

8. The elevator rope sheave testing device as described in claim 7, characterized in that, An anti-rotation clamping point is provided at one end of the first riveting rod, and a thread is provided at the other end of the first riveting rod, so that the other end of the first riveting rod is fixedly connected to the tension sensor by the thread.

9. A testing device for elevator rope pulleys as described in claim 5, 6, 7, or 8, characterized in that, The lower connecting component includes an upper pull rod, a lower pull rod, and a base plate. One end of the upper pull rod is fixedly connected to the tension sensor, the other end of the upper pull rod is hinged to one end of the lower pull rod, the other end of the lower pull rod is fixedly connected to the base plate, and the base plate is fixedly connected to the other end of the pair of crossbeams.

10. The elevator rope sheave testing device as described in claim 9, characterized in that, The lower pull rod includes a lower U-shaped connector, a screw, and a pull rod shaft. Each of the two vertical arms of the lower U-shaped connector has a first pull rod shaft through hole. One end of the screw is fixed to the horizontal arm of the lower U-shaped connector, and the other end of the screw passes through the screw hole on the base plate and is locked by a nut. A second pull rod shaft through hole is also provided on the other end of the upper pull rod. After the pull rod shaft passes through the second pull rod shaft through hole on the upper pull rod, both ends pass through the first pull rod shaft through holes on the two vertical arms of the lower U-shaped connector, respectively.

11. The elevator rope sheave testing device as described in claim 9, characterized in that, The pull rod includes a lower U-shaped connector and a pull rod shaft. A first pull rod shaft through hole is provided on each of the two vertical arms of the lower U-shaped connector. The horizontal arm of the lower U-shaped connector is fixedly connected to the base plate. A second pull rod shaft through hole is also provided on the other end of the upper pull rod. After the pull rod shaft passes through the second pull rod shaft through hole on the upper pull rod, both ends pass through the first pull rod shaft through holes on the two vertical arms of the lower U-shaped connector, respectively.

12. The elevator rope sheave testing device as described in claim 1, characterized in that, The weight of the base plate to which the loading force is applied can be selected as needed, and the tension of the test rope can be adjusted by selecting the weight of the base plate to which the loading force is applied.

13. The elevator rope sheave testing device as described in claim 1, characterized in that, A second large ball-end screw hole is provided on the spreader beam, and a second internal threaded hole is provided on the spreader beam cover plate. The large ball-end screw of the large ball-end screw passes through the first large ball-end screw hole on the load-applying cover plate, then passes through the second large ball-end screw hole on the spreader beam, and then screws into the second internal threaded hole on the spreader beam cover plate, so that the large ball-end screw of the large ball-end screw is fixedly connected to the spreader beam and the spreader beam cover plate.

14. The elevator rope sheave testing device as described in claim 13, characterized in that, Each rope end fixing component includes a rope end base plate, a rope end cover plate, and at least one spherical collar. At least one spherical hole is formed on the rope end base plate, and a spherical collar through-hole is formed on the rope end cover plate. The spherical collar has a spherical head and a columnar portion, and a rope end through-hole is located inside the spherical collar. The rope end cover plate is fixed to the bottom surface of the rope end base plate, aligning the spherical hole on the rope end base plate with the spherical collar through-hole on the rope end cover plate. The spherical head of the spherical collar rests within the spherical hole, and the columnar portion of the spherical collar is inserted into the spherical collar through-hole on the rope end cover plate. The rope end lever passes through the corresponding spherical hole, rope end through-hole, and spherical collar through-hole and is then locked in place, thus fixing the rope end base plate, rope end cover plate, and spherical collar together.

15. The elevator rope sheave testing device as described in claim 14, characterized in that, A threaded section of the rope head is provided at the lower part of the rope head pull rod. The threaded section of the rope head pull rod passes through the corresponding spherical hole, rope head through hole and spherical collar through hole and is then locked by a pull rod nut screwed on the threaded section of the rope head pull rod.

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