A rope wheel test rig and method thereof

Abstract

The application discloses a rope wheel test frame and a method thereof, and relates to the field of steel wire rope testing.The application comprises a fixed base plate, a foot support and a first steel wire rope, the upper end and the lower end of the foot support are provided with the fixed base plate, a speed limiter and a tensioning device are both installed on the surface of the fixed base plate, the speed limiter is located on the surface of the upper end fixed base plate, the speed limiter is externally provided with a rope disengaging device for disengaging the first steel wire rope, the tensioning device is located on the surface of the lower end fixed base plate, the speed limiter is internally provided with a rope wheel, the tensioning device is provided with a tensioning wheel, and the first steel wire rope forms a closed loop around the rope wheel and the tensioning wheel.The application solves the problem of difficult rope disengagement of the rope wheel in the prior art, four groups of speed limiter rope wheels with different hardness are simultaneously tested through fixing four groups of speed limiters and tensioning devices on the fixed base plate, the first steel wire rope can be lifted to a certain extent through the cooperation between the left chuck, the right chuck, the horizontal rod, the fixed sleeve and the pull rod, the first steel wire rope is disengaged from the rope wheel, and the test operation of the subsequent elevator speed limiter is facilitated.

Description

Technical Field

[0001] This invention relates to the field of wire rope testing, and in particular to a rope wheel testing frame and method thereof. Background Technology

[0002] With the rapid urbanization in my country, the number of high-rise buildings is increasing, and elevators have become a vital vertical transportation tool. While elevators bring great convenience, improving their safety and ensuring the safety of people and property has become a crucial issue in elevator development. The elevator speed governor is a critical safety component that monitors the elevator's speed. When the elevator speed exceeds the limit, the electrical switch on the speed governor activates first, disconnecting the elevator's safety circuit and stopping the elevator. If the elevator continues to accelerate after the electrical activation, the mechanical part of the speed governor activates, triggering safety brakes or rope clamps to forcibly stop the elevator. The elevator speed governor limits the elevator's speed and works in conjunction with the safety brake. When the elevator car exceeds the speed limit and other safety protection devices fail to function, the speed governor and safety brake work together to stop the car. Therefore, regularly testing the elevator speed governor is essential for protecting the safety of passengers.

[0003] The speed governor life testing device disclosed in CN218114698U has a drive assembly connected to a reverse rope wheel, which drives the reverse rope wheel to rotate, thereby rotating the speed governor rope wheel. A counting mechanism is used to obtain the number of rotations of the speed governor rope wheel. By controlling the rotation of the reverse rope wheel, the rotation of the speed governor rope wheel can be achieved, making the operation relatively simple and convenient. At the same time, the counterweight assembly can also apply a vertical load to the speed governor, accurately replicating the actual operation of the speed governor. However, the above patent has the following problems in actual use: During the elevator speed governor test, the speed is gradually changed until the speed meets the speed governor's action, and the action speed at this time is recorded. In this process, because the steel wire rope is tightly connected to the speed governor rope wheel, it is difficult for the operator to detach it. External tools are required, making the operation very laborious. Summary of the Invention

[0004] The purpose of this invention is to provide a rope sheave test frame and method. Four sets of speed governors and tensioning devices are fixed on a base plate, allowing simultaneous testing of four sets of speed governor rope sheaves with different hardness. An electrical control system sets parameters such as the rope sheave's running speed and acceleration. Simultaneously, the tensioning device uses a second steel wire rope to connect the counterweight to the fixed base, causing the tensioning wheel to straighten the first steel wire rope under gravity, thus achieving tension. At the start of the test, after each sheave runs a certain number of times, the breakage of the steel wire rope is checked to determine whether it meets the scrap standard. Utilizing the cooperation between the left and right clamps, the crossbar, the fixing sleeve, and the pull rod, the first steel wire rope is lifted to a certain extent by pulling the crossbar laterally and moving it upwards, thus disengaging the first steel wire rope from the rope sheave and facilitating subsequent elevator speed governor testing, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A rope sheave test frame and method thereof includes a fixed base plate, a support frame, and a first wire rope. The fixed base plate is provided at the upper and lower ends of the support frame. A speed limiter and a tensioning device are both installed on the surface of the fixed base plate. The speed limiter is located on the surface of the upper fixed base plate. A rope release device for releasing the first wire rope is provided outside the speed limiter. The tensioning device is located on the surface of the lower fixed base plate. A rope sheave is provided inside the speed limiter. A tensioning wheel is provided in the tensioning device. The first wire rope forms a closed loop around the rope sheave and the tensioning wheel.

[0007] Furthermore, the speed limiter includes a rope pulley, the output end of the speed limiter is connected to the rope pulley, and a rope groove is formed on the outer circumferential surface of the rope pulley, forming friction between the rope groove and the speed limiter.

[0008] Furthermore, the rope-detaching device includes a support base and a rope-detaching assembly. The support base is an n-shaped plate with two rectangular through slots symmetrically opened at the bottom of its two side arms. The rope-detaching assembly is symmetrically arranged on both sides of the speed limiter. The first steel wire rope passes through the middle of the rope-detaching assembly, and the two ends of the rope-detaching assembly are slidably connected to the rectangular through slots.

[0009] Furthermore, the rope release assembly includes a left clamp and a right clamp, the inner walls of which are both arc-shaped grooves. The arc-shaped grooves on the inner walls of the left clamp and the right clamp form a complete circle and are adapted to the first wire rope.

[0010] Furthermore, the left and right clamps are provided with through slots, and crossbars are movably connected in the through slots of both the left and right clamps.

[0011] Furthermore, both ends of the crossbar are fitted with fixing sleeves, and a pull rod is provided on the outer wall of the fixing sleeve. The pull rod is U-shaped, and both ends of the pull rod are fixedly connected to the outer wall of the fixing sleeve.

[0012] Furthermore, the tensioning device includes a fixed base and a tensioning wheel. The bottom of the fixed base is connected to the surface of the fixed base plate, and a tensioning wheel for tensioning the first wire rope is provided above the fixed base.

[0013] Furthermore, a counterweight is provided below the fixed base, and a second steel wire rope is connected to the upper end of the counterweight. The other end of the second steel wire rope is connected to the tensioning wheel.

[0014] Furthermore, the speed limiter and tensioning device are provided in four sets, with the upper speed limiter and lower tensioning device of each set corresponding to each other.

[0015] A method for using a rope pulley test frame includes the following steps:

[0016] The first wire rope is wound around the speed limiter pulley and the tensioning pulley to form a closed loop. The tensioning device straightens the first wire rope through the counterweight, and the counterweight plays a tensioning role. The weight of the counterweight makes the first wire rope tensioned.

[0017] At the start of the test, the running speed and acceleration parameters of the rope pulley were set through the electrical control system, so that four groups of speed limiter rope pulleys with different hardness were tested simultaneously, and the rope pulleys and the first wire rope were matched to check the fatigue damage of the first wire rope and the rope pulley, thereby evaluating the degree of matching between the hardness of the rope pulley and the first wire rope.

[0018] By pulling the horizontal bar laterally with the tie rod, the horizontal bar is moved upward, which in turn moves the first wire rope upward and lifts it to a certain extent, thereby disengaging the first wire rope from the rope pulley. This makes it easier for the operator to disengage the first wire rope from the rope pulley, facilitating subsequent testing of the rope pulley.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The rope wheel test frame and method of the present invention uses four sets of speed limiters and tensioning devices fixed on a fixed base plate. The first steel wire rope forms a closed loop around the speed limiter rope wheel and the tensioning wheel of the tensioning device, so that the speed limiter and tensioning device can simultaneously test four sets of speed limiter rope wheels with different hardness. The running speed, acceleration and other parameters of the rope wheel are set by the electrical control system. At the same time, the tensioning device uses a second steel wire rope to connect the counterweight to the fixed base, so that the tensioning wheel straightens the first steel wire rope under the action of gravity, thereby achieving the tensioning effect. At the beginning of the test, after each wheel runs a certain number of times, the broken wires of the steel wire rope are checked to determine whether it has reached the scrapping standard.

[0021] 2. The rope pulley test frame and method of the present invention utilize the cooperation between the left clamp, the right clamp, the crossbar, the fixing sleeve, and the pull rod. By pulling the crossbar laterally and moving it upward, the left and right clamps can drive the first wire rope to a certain extent. Then, the crossbar is pulled out from the left and right clamps, separating the left and right clamps, thereby facilitating the removal of the first wire rope from the left and right clamps. This disengages the first wire rope from the rope pulley, facilitating subsequent elevator speed governor testing operations. It is highly safe and provides protection for test personnel. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic plan view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the tensioning device of the present invention;

[0025] Figure 4 This is a schematic diagram of the speed limiter and rope release device of the present invention;

[0026] Figure 5 This is a schematic diagram of the rope-removing assembly of the present invention;

[0027] Figure 6 This is a schematic diagram of the wear quantitative test of the present invention.

[0028] In the diagram: 1. Fixed base plate; 2. Speed ​​limiter; 21. Rope pulley; 3. Leg frame; 4. First wire rope; 5. Rope release device; 51. Support base; 52. Rope release assembly; 521. Left clamp; 522. Right clamp; 523. Crossbar; 524. Fixing sleeve; 525. Pull rod; 6. Tensioning device; 61. Fixed seat; 62. Tensioning wheel; 63. Second wire rope; 64. Counterweight. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] To address the technical problem of the existing system where the first wire rope 4 is tightly connected to the speed limiter 2 pulley 21, making it difficult for operators to detach the first wire rope 4 from the pulley 21 and requiring the use of external tools, thus making the operation very laborious, please refer to [link to relevant documentation]. Figures 1-5 This embodiment provides the following technical solution:

[0031] A rope sheave test frame and method thereof includes a fixed base plate 1, a leg frame 3, and a first wire rope 4. The fixed base plate 1 is provided at the upper and lower ends of the leg frame 3. A speed limiter 2 and a tensioning device 6 are both installed on the surface of the fixed base plate 1. The speed limiter 2 is located on the surface of the upper fixed base plate 1. A rope release device 5 for releasing the first wire rope 4 is provided on the outside of the speed limiter 2. The tensioning device 6 is located on the surface of the lower fixed base plate 1. A rope sheave 21 is provided inside the speed limiter 2. A tensioning wheel 62 is provided in the tensioning device 6. The first wire rope 4 forms a closed loop around the rope sheave 21 and the tensioning wheel 62.

[0032] Speed ​​limiter 2 includes a rope pulley 21. The output end of speed limiter 2 is connected to rope pulley 21. A rope groove is formed on the outer circumferential surface of rope pulley 21, and friction is generated between the rope groove and speed limiter 2.

[0033] It should be noted that the speed limiter 2 is the test device consisting of the upper rope pulley 21, the motor, the worm gear reducer, and the lower tensioning device 6.

[0034] The tensioning device 6 includes a fixed base 61 and a tensioning wheel 62. The bottom of the fixed base 61 is connected to the surface of the fixed base plate 1. The tensioning wheel 62 for tensioning the first steel wire rope 4 is provided above the fixed base 61. A counterweight 64 is provided below the fixed base 61. The upper end of the counterweight 64 is connected to the second steel wire rope 63. The other end of the second steel wire rope 63 is connected to the tensioning wheel 62.

[0035] Specifically, the first wire rope 4 forms a closed loop by winding around the speed limiter 2 pulley 21 and tensioning pulley 62. The weight of the tensioning device 6 can tension the first wire rope 4 and create a certain friction between the rope groove of the pulley 21 and the speed limiter 2. Four sets of testing devices are fixed on the stand 3, which can simultaneously test four sets of speed limiter 2 pulleys 21 with different hardnesses. The hardness test is performed by using pulleys 21 with different hardnesses (such as 300HV, 400HV, 500HV, 600HV) to test the matching between the pulley 21 and the first wire rope 4. The running speed and acceleration parameters of the pulley 21 are set by the electrical control system. At the beginning of the test, the electrical control system mainly controls the speed of the speed limiter 2 motor, thereby controlling the running speed and acceleration / deceleration time of the first wire rope 4. The tensioning device 6 adopts... The counterweight 64 is connected to the fixed base 61 by the second steel wire rope 63, so that the tensioning wheel 62 straightens the first steel wire rope 4 under the action of gravity, thereby achieving the tensioning effect. After each rope wheel 21 runs a certain number of times, the broken wire condition of the first steel wire rope 4 is checked. During the test, the wear condition of the rope wheel 21 and the first steel wire rope 4 is recorded throughout the process. At the same time, in order to facilitate effective measurement, the T and d values ​​are recorded (T is the distance from the edge of the rope wheel 21 to the upper edge of the first steel wire rope 4, and d is the diameter of the first steel wire rope 4) to detect the wear condition of the rope groove of the rope wheel 21 and the wear condition of the first steel wire rope 4, so as to determine whether it has reached the scrapping standard. By simulating the fatigue failure of the first steel wire rope 4 and the rope wheel 21 under the actual working conditions of the speed limiter 2, the appropriate hardness of the rope wheel 21 and the matching first steel wire rope 4 are obtained.

[0036] The test results of the matching degree between the strength of the four groups of rope pulleys 21 with different hardness and the first wire rope 4 are shown in Table 1:

[0037] (Note: In Table 1, A, B, C, and D represent the degree of wire breakage in the first wire rope 4, with A being the best and D the worst.)

[0038] Based on the test results, the degree of matching between the hardness of the rope pulley 21 and the first wire rope 4 is evaluated.

[0039] Table 1

[0040]

[0041] The speed limiter 2 and the tensioning device 6 are each provided with four sets, with the upper speed limiter 2 and the lower tensioning device 6 of each set corresponding to each other.

[0042] It should be noted that the four-group setup allows for simultaneous testing of four speed limiter 2 rope pulleys 21 with different hardnesses, thus improving testing efficiency.

[0043] The rope release device 5 includes a support base 51 and a rope release assembly 52. ​​The support base 51 is an n-shaped plate with two rectangular through slots symmetrically opened at the bottom of the two side arms. The rope release assembly 52 is symmetrically arranged on both sides of the speed limiter 2. The first steel wire rope 4 passes through the middle of the rope release assembly 52, and the two ends of the rope release assembly 52 are slidably connected to the rectangular through slots.

[0044] The rope release assembly 52 includes a left clamp 521 and a right clamp 522. The inner walls of the left clamp 521 and the right clamp 522 are both arc-shaped grooves. The arc-shaped grooves on the inner walls of the left clamp 521 and the right clamp 522 form a complete circle and are adapted to the first wire rope 4.

[0045] It should be noted that the left clamp 521 and the right clamp 522 can fix the first wire rope 4, and the arc-shaped grooves on the inner walls of the left clamp 521 and the right clamp 522 fit into the first wire rope 4, so that the left clamp 521 and the right clamp 522 will not affect the normal operation of the first wire rope 4.

[0046] The left chuck 521 and the right chuck 522 are provided with through slots. A crossbar 523 is movably connected in the through slots of the left chuck 521 and the right chuck 522. Both ends of the crossbar 523 are fitted with fixing sleeves 524. A pull rod 525 is provided on the outer wall of the fixing sleeve 524. The pull rod 525 is U-shaped and its two ends are fixedly connected to the outer wall of the fixing sleeve 524.

[0047] Specifically, by pulling the crossbar 523 laterally with the pull rod 525, the crossbar 523 is moved upward, causing the left clamp 521 and right clamp 522 to pull apart the first wire rope 4 and lift it to a certain extent, thereby disengaging the first wire rope 4 from the rope wheel 21. Then, the crossbar 523 is pulled out from the left clamp 521 and right clamp 522, preventing the fixing sleeve 524 from fixing the left clamp 521 and right clamp 522 through the crossbar 523. After the crossbar 523 is pulled out, the left clamp 521 and right clamp 522 are separated, making it easy to remove the first wire rope 4 from the left clamp 521 and right clamp 522. This facilitates subsequent testing of the rope wheel 21, ensuring high safety, providing convenience for test personnel, and being simple to operate. The operator can easily disengage the first wire rope 4 from the rope wheel 21.

[0048] A method for using a rope pulley test frame includes the following steps:

[0049] The first wire rope 4 is wound around the rope pulley 21 and tension pulley 62 of the speed limiter 2 to form a closed loop. The tensioning device 6 straightens the first wire rope 4 through the counterweight 64. The counterweight 64 plays a tensioning role, and the weight of the counterweight 64 makes the first wire rope 4 tensile.

[0050] At the start of the test, the running speed and acceleration parameters of the rope wheel 21 were set through the electrical control system, so that four groups of speed limiter 2 rope wheels 21 with different hardness were tested simultaneously, and the rope wheel 21 and the first steel wire rope 4 were matched to check the fatigue failure of the first steel wire rope 4 and the rope wheel 21, thereby evaluating the degree of matching between the hardness of the rope wheel 21 and the first steel wire rope 4.

[0051] By pulling the crossbar 523 laterally with the pull rod 525, the crossbar 523 is moved upward, which in turn moves the first wire rope 4 upward and lifts it to a certain extent, thereby disengaging the first wire rope 4 from the rope wheel 21. This makes it easier for the operator to disengage the first wire rope 4 from the rope wheel 21, facilitating subsequent testing of the rope wheel 21.

[0052] Please see Figure 6 During the test, the wear of the rope pulley 21 and the first wire rope 4 was recorded throughout the process. At the same time, in order to facilitate effective measurement, the values ​​of T and d were recorded. T is the distance from the edge of the rope pulley 21 to the upper edge of the first wire rope 4, and d is the diameter of the first wire rope 4, so as to detect the wear of the rope groove of the rope pulley 21 and the wear of the first wire rope 4.

[0053] Working principle: Four sets of testing devices are fixed on the upper part of the tripod 3. A closed loop is formed by the first steel wire rope 4 winding around the speed limiter 2 pulley 21 and the tensioning pulley 62. Four sets of speed limiter 2 pulleys 21 with different hardness can be tested simultaneously, thereby performing a matching test between the pulley 21 and the first steel wire rope 4. The running speed, acceleration and other parameters of the pulley 21 are set by the electrical control system. The tensioning device 6 uses the second steel wire rope 63 to connect the counterweight 64 to the fixed base 61, so that the tensioning pulley 62 straightens the first steel wire rope 4 under the action of gravity, thereby achieving the tensioning effect. At the beginning of the test, after each pulley 21 runs a certain number of times, the fatigue failure of the first steel wire rope 4 and pulley 21 under the actual working conditions of the speed limiter 2 is simulated, thereby determining whether it has reached the scrapping level. The standard procedure involves pulling the crossbar 523 laterally via the pull rod 525, causing the crossbar 523 to move upward. This lateral movement pulls the first wire rope 4 apart, and the upward movement raises the first wire rope 4 to a certain extent, thus disengaging it from the rope wheel 21. The crossbar 523 is then pulled out from the left clamp 521 and the right clamp 522, preventing the fixing sleeve 524 from securing the left clamp 521 and the right clamp 522 via the crossbar 523. After the crossbar 523 is pulled out, the left clamp 521 and the right clamp 522 are separated, making it easier to remove the first wire rope 4 from them. This facilitates subsequent testing of the rope wheel 21, ensuring high safety and providing convenience for testing personnel. The procedure is also simple to operate, allowing operators to easily disengage the first wire rope 4 from the rope wheel 21.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rope pulley test frame, comprising a fixed base plate (1), legs (3), and a first wire rope (4), characterized in that, The upper and lower ends of the tripod (3) are provided with fixed base plates (1). The speed limiter (2) and the tensioning device (6) are both installed on the surface of the fixed base plate (1). The speed limiter (2) is located on the surface of the upper fixed base plate (1). The speed limiter (2) is provided with a rope release device (5) for releasing the first wire rope (4) on the outside. The tensioning device (6) is located on the surface of the lower fixed base plate (1). The speed limiter (2) is provided with a rope wheel (21). The tensioning device (6) is provided with a tensioning wheel (62). The first wire rope (4) forms a closed loop around the rope wheel (21) and the tensioning wheel (62). The speed limiter (2) includes a rope pulley (21), the output end of the speed limiter (2) is connected to the rope pulley (21), and a rope groove is provided on the outer circumferential surface of the rope pulley (21), and friction is formed between the rope groove and the speed limiter (2); The rope-removing device (5) includes a support base (51) and a rope-removing assembly (52). The support base (51) is an n-shaped plate with two rectangular through slots symmetrically opened at the bottom of the two side arms. The rope-removing assembly (52) is symmetrically arranged on both sides of the speed limiter (2). The first steel wire rope (4) passes through the middle of the rope-removing assembly (52), and the two ends of the rope-removing assembly (52) are slidably connected to the rectangular through slots. The rope release assembly (52) includes a left clamp (521) and a right clamp (522). The inner walls of both the left clamp (521) and the right clamp (522) are arc-shaped grooves. The arc-shaped grooves on the inner walls of the left clamp (521) and the right clamp (522) form a complete circle and are adapted to the first wire rope (4). The tensioning device (6) includes a fixed seat (61) and a tensioning wheel (62). The bottom of the fixed seat (61) is connected to the surface of the fixed base plate (1), and the tensioning wheel (62) for tensioning the first wire rope (4) is provided above the fixed seat (61).

2. The rope pulley test frame as described in claim 1, characterized in that, The left chuck (521) and right chuck (522) are provided with through slots, and crossbars (523) are movably connected in the through slots of the left chuck (521) and right chuck (522).

3. The rope pulley test frame as described in claim 2, characterized in that, Both ends of the crossbar (523) are fitted with fixed sleeves (524). A pull rod (525) is provided on the outer wall of the fixed sleeve (524). The pull rod (525) is U-shaped and its two ends are fixedly connected to the outer wall of the fixed sleeve (524).

4. The rope pulley test frame as described in claim 1, characterized in that, A counterweight (64) is provided below the fixed base (61), and a second steel wire rope (63) is connected to the upper end of the counterweight (64). The other end of the second steel wire rope (63) is connected to the tension wheel (62).

5. The rope pulley test frame as described in claim 1, characterized in that, The speed limiter (2) and tensioning device (6) are each provided in four sets, with the upper speed limiter (2) and lower tensioning device (6) of each set corresponding to each other.

6. A method of using the rope pulley test frame as described in any one of claims 1-5, characterized in that, Includes the following steps: The first wire rope (4) is wound around the rope pulley (21) and tension pulley (62) of the speed limiter (2) to form a closed loop. The tensioning device (6) straightens the first wire rope (4) through the counterweight (64). The counterweight (64) plays a tensioning role, and the weight of the counterweight (64) makes the first wire rope (4) tensile. At the start of the test, the running speed and acceleration parameters of the rope wheel (21) were set by the electrical control system, so that four sets of speed limiter (2) rope wheels (21) with different hardness were tested at the same time, and the rope wheel (21) and the first wire rope (4) were matched to check the fatigue damage of the first wire rope (4) and the rope wheel (21), so as to evaluate the degree of matching between the hardness of the rope wheel (21) and the first wire rope (4); By pulling the crossbar (523) laterally with the pull rod (525) and causing the crossbar (523) to move upward, the first wire rope (4) will be pulled upward and lifted to a certain extent, so that the first wire rope (4) will be disengaged from the rope wheel (21), making it easier for the operator to disengage the first wire rope (4) from the rope wheel (21) and facilitating subsequent test operations on the rope wheel (21).

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