Abrasion detection device for pulley groove of crane

Abstract

A crane pulley groove abrasion detection device comprises a shell, a servo electric cylinder and a detection head. The output end of the servo electric cylinder is connected with the telescopic rod, the movement stroke of the telescopic rod is that the telescopic rod moves back and forth along the axis of the telescopic rod, the other end of the telescopic rod is connected with the detection head, the middle of the servo electric cylinder is connected with the inner surface of the shell, the shell is provided with a sliding hole, and the middle of the telescopic rod is inserted into the sliding hole. Then the servo electric cylinder is started to drive the telescopic rod to move towards the pulley groove until the detection head is connected with the inner wall of the pulley groove, then the servo electric cylinder measures the moving distance of the telescopic rod, and the moving distance is the depth of the pulley groove; the depth is obtained by the servo motor without manual measurement, so that the measurement is accurate; and the accurate depth of the pulley groove is obtained, so that the abrasion degree of the pulley groove can be accurately judged. Therefore, according to the design, the depth of the pulley groove is accurately measured, and the abrasion degree of the pulley groove is accurately judged.

Description

Technical Field

[0001] The present invention relates to a wear detection device, belonging to the field of crane equipment detection, and particularly relates to a wear detection device for the pulley groove of a crane. Background Art

[0002] During the long-term operation of a crane, the pulley groove of the pulley will continuously be subjected to the friction of the wire rope and the pressure of the heavy object, resulting in wear. This wear will not only affect the structural strength and stability of the pulley itself, but may also cause problems such as the wire rope jumping out of the groove and getting stuck. Therefore, the wear detection of the pulley groove is very important.

[0003] Chinese Patent with application number 201910214204.8 and application date of March 20, 2019 discloses a pulley wear detection device and detection method, including a detection base plate positioned and connected to the pulley and a detection ruler connected to the detection base plate for detecting the wear amount of the groove. One end of the detection base plate is an arc section adapted to the groove. Although this design measures the groove depth by making the detection ruler enter the groove to judge the wear degree of the groove, it still has the following defects: When this design is applied, it is necessary to manually slide the detection ruler to measure the depth of the pulley groove. However, when manually reading the detection ruler, errors will occur, which will lead to inaccurate measurement of the depth of the pulley groove, and thus the accuracy of judging the wear degree of the groove is relatively low.

[0004] Disclosing the information of this background art section is only intended to increase the overall understanding of the present application, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects and problems of inaccurate measurement of the depth of the pulley groove in the prior art, and provide a wear detection device for the pulley groove of a crane with accurate measurement of the depth of the pulley groove.

[0006] To achieve the above purpose, the technical solution of the present invention is: A wear detection device for the pulley groove of a crane, the device includes a housing, a servo electric cylinder and a detection head; The output end of the servo electric cylinder is connected to one end of the telescopic rod. The movement stroke of the telescopic rod is to move back and forth along its axis. The other end of the telescopic rod is connected to one end of the detection head, and the other end of the detection head faces one end of the pulley groove; The middle part of the servo electric cylinder is connected to the inner surface of the housing. A sliding hole is provided at one end of the housing close to the pulley groove, and the middle part of the telescopic rod is inserted into the sliding hole.

[0007] The detection head includes a frustum end and a cylindrical end. One end of the frustum end is connected to one end of the telescopic rod, and the other end of the frustum end is connected to one end of the cylindrical end. The diameter of the cylindrical end is smaller than the width of the pulley groove, and the length of the cylindrical end is greater than the depth of the pulley groove.

[0008] The frustum end includes a large frustum end and a small frustum end. The diameter of the large frustum end is greater than the diameter of the small frustum end, and the diameter of the small frustum end is the same as the diameter of the cylindrical end.

[0009] One end of the large frustum end away from the small frustum end is connected to one end of the telescopic rod, and a sealing ring is sleeved on the telescopic rod near the large frustum end.

[0010] The diameter of the large frustum end is greater than the outer diameter of the sealing ring, and the outer diameter of the sealing ring is greater than the diameter of the sliding hole.

[0011] One side of the housing near the pulley groove is the detection surface. A groove is provided at a position corresponding to the pulley groove on the detection surface. The groove includes a groove side wall and a groove bottom wall. One end of the groove side wall is perpendicularly connected to the detection surface, and the other end of the groove side wall is perpendicularly connected to the groove bottom wall. A sliding hole is provided on the groove bottom wall; the sealing ring is located outside the sliding hole.

[0012] The outer surface of the servo electric cylinder is connected to one end of the fixture, and the other end of the fixture is connected to the inner surface of the housing.

[0013] The servo electric cylinder includes a servo motor and a lead screw. The output end of the servo motor is connected to one end of the lead screw, and the other end of the lead screw is connected to one end of the telescopic rod.

[0014] A displacement sensor is provided at one end of the lead screw. A wire is provided at one end of the servo electric cylinder away from the telescopic rod. The wire passes through the housing and is connected to the outer surface of the jib, and the end of the wire away from the lead screw is connected to the control module.

[0015] The housing is made of stainless steel material, and the detection head is made of stainless steel material.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In a crane pulley groove wear detection device of the present invention, the device includes a housing, a servo cylinder and a detection head. The output end of the servo cylinder is connected to one end of a telescopic rod, and the other end of the telescopic rod is connected to one end of the detection head. The other end of the detection head faces the pulley groove. The middle part of the servo cylinder is connected to the inner surface of the housing. A sliding hole is provided on the housing, and the middle part of the telescopic rod is inserted into the sliding hole. During application, first fix the housing near one end of the pulley groove where it does not contact the steel wire rope, make the detection head face the pulley groove, then start the servo cylinder, and then the servo cylinder drives the telescopic rod and the detection head to move towards the pulley groove in sequence. When the detection head is connected to the bottom wall of the pulley groove, the servo cylinder records the initial moving distance of the telescopic rod, which is the initial depth of the pulley groove. When it is necessary to detect the wear degree of the pulley groove, start the servo cylinder to make the telescopic rod and the detection head move towards the pulley groove. When the detection head is connected to the bottom wall of the pulley groove, the servo cylinder records the moving distance of the telescopic rod. This moving distance is the depth of the pulley groove. Then subtract the initial depth from the depth of the pulley groove to obtain the wear amount of the pulley groove, and then judge the wear degree of the pulley groove according to this wear amount. The advantages of the present invention also include: First: By measuring the moving distance of the telescopic rod by the servo cylinder, the initial depth and depth of the pulley groove can be obtained, without manual measurement of the depth of the pulley groove, so the accuracy is relatively high; because the accurate depth of the pulley groove is obtained, the accurate wear amount of the pulley groove can be calculated, so the wear degree of the pulley groove can be judged more accurately; Second: The positions of the housing and the pulley groove are both fixed, so the telescopic rod moves towards the pulley groove from the same position every time, so the consistency and repeatability of the detection are relatively high, and it is more convenient to trace historical data; Third: Some pulleys are located at a relatively high position on the crane. If manual measurement is used, manual inspectors need to reach near the higher pulley and then start the measurement process, so there is a certain danger in this measurement process; while the present invention does not require manual measurement, so there is no danger in the measurement process; and it saves the time of manual detection and improves the detection efficiency; Therefore, the present invention measures the depth of the pulley groove accurately and judges the wear degree of the pulley groove relatively accurately.

[0017] 2. In a crane pulley groove wear detection device of the present invention, the detection head includes a frustum end and a cylindrical end. The frustum end includes a large frustum end and a small frustum end. A sealing ring is sleeved on one end of the telescopic rod close to the large frustum end. A groove is provided on the housing, and a sliding hole is provided on the bottom wall of the groove. During application, when no measurement is carried out, the sealing ring is connected to the sliding hole to block the sliding hole, so that the inside of the housing is in a sealed state, preventing rain, snow or impurities from entering the housing and affecting the service life of the servo cylinder. The large frustum end shields the sealing ring, further improving the sealing effect; the groove makes the sliding hole located inside the housing, also improving the sealing effect, and the groove can accommodate the detection head, providing a certain protection for the detection head; when measurement is carried out, the cylindrical end extends into the pulley groove. Since the diameter of the cylindrical end is small, it can be connected to the bottom wall of the pulley groove, that is, accurate measurement data can be obtained. Therefore, the present invention has good sealing performance.

[0018] 3. In a crane pulley groove wear detection device of the present invention, the servo cylinder is connected to the inner surface of the housing through a fixture. The servo cylinder includes a servo motor, a lead screw, a displacement sensor and an electric wire. The electric wire is connected to the control module of the upper computer. During application, the servo cylinder is fixed by the fixture to prevent the servo cylinder from moving and affecting the detection of the pulley groove depth; the servo cylinder is powered and controlled through the electric wire to start the servo cylinder and control the rotation direction of the servo cylinder. Then, the output end of the servo motor drives the lead screw to rotate. The lead screw will generate an axial displacement while rotating, and then the lead screw drives the telescopic rod to move. During this process, the displacement sensor measures the moving distance of the lead screw, thereby obtaining the moving distance of the telescopic rod, and then obtaining the depth of the pulley groove; the size of the servo cylinder is small, so the size of the present invention is small. The present invention can be fixedly installed near the pulley groove for a long time without affecting the operation of the pulley and related components. Therefore, the present invention will not affect the operation effect of the crane.

[0019] 4. In a crane pulley groove wear detection device of the present invention, both the housing and the detection head are made of stainless steel. During application, the stainless steel housing is corrosion-resistant and moisture-proof, playing a role in preventing rain and snow and extending the service life of internal parts; the stainless steel detection head is not easily deformed and wear-resistant, which can avoid the situation that the detection head is worn and then the measurement of the roller slide groove depth is inaccurate. Therefore, the present invention has the function of preventing rain and snow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the structural schematic diagram of the present invention.

[0021] Figure 2 is Figure 1 the structural schematic diagram of the telescopic rod in

[0022] Figure 3 is Figure 2Schematic diagram of the structure of the detection head in

[0023] Figure 4 is Figure 1 Schematic diagram of the structure of the pulley groove in

[0024] Figure 5 is Figure 3 Schematic diagram of the structure of the cylindrical end in

[0025] Figure 6 is Figure 2 Schematic diagram of the structure of the sealing ring in

[0026] Figure 7 Schematic diagram of the application of the present invention.

[0027] Figure 8 is Figure 7 Schematic diagram of the structure of the groove in

[0028] Figure 9 is Figure 8 Schematic diagram of the structure of the groove side wall in

[0029] Figure 10 is Figure 1 Schematic diagram of the structure of the housing in

[0030] Figure 11 is Figure 2 Schematic diagram of the structure of the servo electric cylinder in

[0031] Figure 12 is Figure 2 Schematic diagram of the structure of the fixture in

[0032] In the figure: housing 1, sliding hole 11, detection surface 12, groove 13, groove side wall 131, groove bottom wall 132, servo electric cylinder 2, servo motor 21, lead screw 22, displacement sensor 23, electric wire 24, detection head 3, frustum end 31, large frustum end 311, small frustum end 312, cylindrical end 32, telescopic rod 4, sealing ring 41, pulley groove 5, pulley 51, wire rope 52, depth 53, fixture 6. Detailed implementation manners

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0034] Please refer to Figure 1 — Figure 12 , a crane pulley groove wear detection device, the device includes a housing 1, a servo electric cylinder 2 and a detection head 3; The output end of the servo electric cylinder 2 is connected to one end of the telescopic rod 4. The moving stroke of the telescopic rod 4 is to move back and forth along its axis. The other end of the telescopic rod 4 is connected to one end of the detection head 3, and the other end of the detection head 3 faces one end of the pulley groove 5. The middle part of the servo electric cylinder 2 is connected to the inner surface of the housing 1. One end of the housing 1 near the pulley groove 5 is provided with a sliding hole 11, and the middle part of the telescopic rod 4 is inserted into the sliding hole 11.

[0035] The detection head 3 includes a frustum end 31 and a cylindrical end 32. One end of the frustum end 31 is connected to one end of the telescopic rod 4, the other end of the frustum end 31 is connected to one end of the cylindrical end 32, the diameter of the cylindrical end 32 is smaller than the width of the pulley groove 5, and the length of the cylindrical end 32 is greater than the depth 53 of the pulley groove 5.

[0036] The frustum end 31 includes a large frustum end 311 and a small frustum end 312. The diameter of the large frustum end 311 is greater than the diameter of the small frustum end 312, and the diameter of the small frustum end 312 is the same as the diameter of the cylindrical end 32.

[0037] One end of the large frustum end 311 away from the small frustum end 312 is connected to one end of the telescopic rod 4, and a sealing ring 41 is sleeved on the telescopic rod 4 near the large frustum end 311.

[0038] The diameter of the large frustum end 311 is greater than the outer diameter of the sealing ring 41, and the outer diameter of the sealing ring 41 is greater than the diameter of the sliding hole 11.

[0039] One side of the housing 1 near the pulley groove 5 is a detection surface 12. A groove 13 is provided at a position corresponding to the pulley groove 5 on the detection surface 12. The groove 13 includes a groove side wall 131 and a groove bottom wall 132. One end of the groove side wall 131 is perpendicularly connected to the detection surface 12, the other end of the groove side wall 131 is perpendicularly connected to the groove bottom wall 132, and the sliding hole 11 is provided on the groove bottom wall 132; the sealing ring 41 is located outside the sliding hole 11.

[0040] The outer surface of the servo electric cylinder 2 is connected to one end of the fixture 6, and the other end of the fixture 6 is connected to the inner surface of the housing 1.

[0041] The servo electric cylinder 2 includes a servo motor 21 and a lead screw 22. The output end of the servo motor 21 is connected to one end of the lead screw 22, and the other end of the lead screw 22 is connected to one end of the telescopic rod 4.

[0042] A displacement sensor 23 is provided at one end of the lead screw 22. A wire 24 is provided at the end of the servo electric cylinder 2 away from the telescopic rod 4. The wire 24 passes through the housing 1 and is connected to the outer surface of the jib. The end of the wire 24 away from the lead screw 22 is connected to the control module.

[0043] The housing 1 is made of stainless steel material, and the detection head 3 is made of stainless steel material.

[0044] The supplementary description of the present invention is as follows: The wear of the pulley groove 5 of the present invention refers to: when lifting a heavy object with the steel wire rope 52, relative sliding and friction occur between the surface of the steel wire rope 52 and the surface of the pulley groove 5, which will cause the surface of the pulley groove 5 to be gradually worn by the steel wire rope 52, manifested as the depth 53 of the pulley groove 5 becoming larger. Therefore, the depth 53 is measured by the present invention to judge the wear degree of the pulley groove 5.

[0045] Embodiment 1: Please refer to Figure 1 — Figure 12 , a crane pulley groove wear detection device, the device includes a housing 1, a servo electric cylinder 2 and a detection head 3; the output end of the servo electric cylinder 2 is connected to one end of the telescopic rod 4, the movement stroke of the telescopic rod 4 is to move back and forth along its axis, the other end of the telescopic rod 4 is connected to one end of the detection head 3, and the other end of the detection head 3 faces one end of the pulley groove 5; the middle of the servo electric cylinder 2 is connected to the inner surface of the housing 1, and a sliding hole 11 is provided at one end of the housing 1 close to the pulley groove 5, and the middle of the telescopic rod 4 is inserted into the sliding hole 11.

[0046] During application, first stop the operation of the pulley 51 and related components. Then, fix the housing 1 on the side where the pulley groove 5 is not connected to the steel wire rope 52, align the detection head 3 with the pulley groove 5. Then, start the servo electric cylinder 2, and the servo electric cylinder 2 drives the telescopic rod 4 to move towards the pulley groove 5. Then, the telescopic rod 4 drives the detection head 3 to move towards the pulley groove 5 until the detection head 3 is connected to the pulley groove 5. At this time, the detection head 3 will receive the reaction force from the pulley groove 5. Then, the servo electric cylinder 2 records the initial moving distance of the telescopic rod 4, and this initial moving distance is the initial depth of the pulley groove 5. Then, start the servo electric cylinder 2, and the servo electric cylinder 2 drives the telescopic rod 4 to move towards the servo electric cylinder 2. Then, the telescopic rod 4 drives the detection head 3 to move towards the sliding hole 11 until the detection head 3 is located outside the sliding hole 11; when it is necessary to detect the wear degree of the pulley groove 5, first start the servo electric cylinder 2, and the servo electric cylinder 2 drives the telescopic rod 4 to move towards the pulley groove 5. Then, the telescopic rod 4 drives the detection head 3 to move towards the pulley groove 5 until the detection head 3 is connected to the pulley groove 5. At this time, the detection head 3 will receive the reaction force from the pulley groove 5. Then, the servo electric cylinder 2 records the moving distance of the telescopic rod 4, and this moving distance is the depth of the pulley groove 5. Then, use the depth minus the initial depth to obtain the wear amount of the pulley groove 5, and then judge the wear degree of the pulley groove 5 according to this wear amount; then start the servo electric cylinder 2, and the servo electric cylinder 2 drives the telescopic rod 4 to move towards the servo electric cylinder 2. Then, the telescopic rod 4 drives the detection head 3 to move towards the sliding hole 11 until the detection head 3 is located outside the sliding hole 11. At this time, the measurement is completed; the number of times of the foregoing measurement process is set according to needs and can be repeated multiple times.

[0047] Embodiment 2: The basic content is the same as that of Embodiment 1, and the difference lies in: Please refer to Figure 1 — Figure 9, the detection head 3 includes a frustum end 31 and a cylindrical end 32. One end of the frustum end 31 is connected to one end of the telescopic rod 4, and the other end of the frustum end 31 is connected to one end of the cylindrical end 32. The diameter of the cylindrical end 32 is smaller than the width of the pulley groove 5, and the length of the cylindrical end 32 is greater than the depth 53 of the pulley groove 5. The frustum end 31 includes a large frustum end 311 and a small frustum end 312. The diameter of the large frustum end 311 is greater than the diameter of the small frustum end 312, and the diameter of the small frustum end 312 is the same as the diameter of the cylindrical end 32. The end of the large frustum end 311 away from the small frustum end 312 is connected to one end of the telescopic rod 4. A sealing ring 41 is sleeved on the telescopic rod 4 near the large frustum end 311. The diameter of the large frustum end 311 is greater than the outer diameter of the sealing ring 41, and the outer diameter of the sealing ring 41 is greater than the diameter of the sliding hole 11. One side of the housing 1 near the pulley groove 5 is a detection surface 12. A groove 13 is provided at the position corresponding to the pulley groove 5 on the detection surface 12. The groove 13 includes a groove side wall 131 and a groove bottom wall 132. One end of the groove side wall 131 is vertically connected to the detection surface 12, and the other end of the groove side wall 131 is vertically connected to the groove bottom wall 132. A sliding hole 11 is provided on the groove bottom wall 132; the sealing ring 41 is located outside the sliding hole 11.

[0048] During application, when the telescopic rod 4 moves, the telescopic rod 4 first drives the frustum end 31 to move, and then the frustum end 31 drives the cylindrical end 32 to move, so as to achieve the effect that the cylindrical end 32 moves towards the pulley groove 5 or moves away from the pulley groove 5; the diameter of the cylindrical end 32 is smaller than the inner diameter of the pulley groove 5, so the cylindrical end 32 can be inserted into the pulley groove 5, that is, the depth of the pulley groove 5 can be measured; the small frustum end 312 is used to connect the cylindrical end 31. The diameter of the large frustum end 311 is greater than the outer diameter of the sealing ring 41. When the sealing ring 41 is located outside the sliding hole 41, the large frustum end 311 forms a shield for the sealing ring 41 to improve the sealing effect; when the sealing ring 41 is located outside the sliding hole 11, the sealing ring 41 seals the sliding hole 11 to prevent rain and snow from entering the housing 1 through the sliding hole 11, thereby affecting the service life of components such as the servo electric cylinder 2; the sliding hole 11 is located on the groove bottom wall 132 of the groove 13, which forms a certain protection for the sliding hole 11 and improves the sealing effect of the sliding hole 11. The groove 13 can accommodate the detection head 3 to protect the detection head 3.

[0049] Embodiment 3: The basic content is the same as that of Embodiment 1, except that: Please refer to Figure 1 — Figure 11, one end of the outer surface of the servo electric cylinder 2 is connected to one end of the fixture 6, and the other end of the fixture 6 is connected to the inner surface of the housing 1. The servo electric cylinder 2 includes a servo motor 21 and a lead screw 22. The output end of the servo motor 21 is connected to one end of the lead screw 22, and the other end of the lead screw 22 is connected to one end of the telescopic rod 4. A displacement sensor 23 is provided at one end of the lead screw 22. A wire 24 is provided at the end of the servo electric cylinder 2 away from the telescopic rod 4. The wire 24 passes through the housing 1 and is connected to the outer surface of the boom. The end of the wire 24 away from the lead screw 22 is connected to the control module.

[0050] During application, one end of the fixture 6 clamps the servo electric cylinder 2 to fix the servo electric cylinder 2, and the other end of the fixture 6 is connected to the housing 1 to fix the fixture 6 and the housing 1; when the servo electric cylinder 2 is started, the servo motor 21 is started first, and then the servo motor 21 drives the lead screw 22 to rotate clockwise or counterclockwise. At this time, the lead screw 22 moves forward or backward along its axis, and then the lead screw 22 drives the telescopic rod 4 to move towards the pulley groove 5 or move away from the pulley groove 5; during this process, the displacement sensor 23 records the moving distance of the lead screw 22, which is the moving distance of the telescopic rod 4; then the servo electric cylinder 2 transmits the moving distance to the control module through the wire 24. The control module is located in the upper computer, and then the upper computer converts the moving distance into the wear amount. The wire 24 includes a signal line and a power supply line, and is routed along the boom by steel straps.

[0051] Embodiment 4: The basic content is the same as that of Embodiment 1, except that: Please refer to Figure 1 — Figure 12 , the housing 1 is made of stainless steel material, and the detection head 3 is made of stainless steel material.

[0052] During application, the housing 1 made of stainless steel material is corrosion-resistant and moisture-proof, protecting the internal components from rain and snow, avoiding affecting the detection effect and reducing the service life of the internal components; the detection head 3 made of stainless steel material has less deformation and is wear-resistant, that is, the length of the detection head 3 is fixed and will not affect the measurement of the depth 53 due to the change in the length of the detection head 3, and the detection head 3 is resistant to rain and snow erosion, so it has a longer service life.

[0053] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those of ordinary skill in the art according to the disclosure of the present invention shall be included in the protection scope recorded in the claims.

Claims

1. A crane pulley groove wear detection device, characterized in that: The device comprises a housing (1), a servo electric cylinder (2) and a detection head (3); The output end of the servo electric cylinder (2) is connected to one end of a telescopic rod (4), the movement stroke of the telescopic rod (4) is to move back and forth along its axis, the other end of the telescopic rod (4) is connected to one end of a detection head (3), and the other end of the detection head (3) faces one end of a pulley groove (5); The middle portion of the servo electric cylinder (2) is connected to the inner surface of the housing (1), and a sliding hole (11) is provided at one end of the housing (1) close to the pulley groove (5), and the middle portion of the telescopic rod (4) is inserted into the sliding hole (11).

2. A crane pulley groove wear detection device according to claim 1, characterized in that: The detection head (3) comprises a truncated cone end (31) and a cylindrical end (32), one end of the truncated cone end (31) is connected to one end of the telescopic rod (4), and the other end of the truncated cone end (31) is connected to one end of the cylindrical end (32), the diameter of the cylindrical end (32) is smaller than the width of the pulley groove (5), and the length of the cylindrical end (32) is greater than the depth 53 of the pulley groove (5).

3. A crane pulley groove wear detection device according to claim 2, characterized in that: The truncated cone end (31) comprises a truncated cone large end (311) and a truncated cone small end (312); the diameter of the truncated cone large end (311) is larger than the diameter of the truncated cone small end (312); and the diameter of the truncated cone small end (312) is the same as the diameter of the cylindrical end (32).

4. A crane pulley groove wear detection device according to claim 3, characterized in that: One end of the truncated cone large end (311) away from the truncated cone small end (312) is connected to one end of the telescopic rod (4), and a sealing ring (41) is sleeved on one end of the telescopic rod (4) close to the truncated cone large end (311).

5. A crane pulley groove wear detection device according to claim 4, characterized in that: The diameter of the large end (311) of the truncated cone is larger than the outer diameter of the sealing ring (41), and the outer diameter of the sealing ring (41) is larger than the diameter of the sliding hole (11).

6. A crane pulley groove wear detection device according to claim 5, characterized in that: A surface of the housing (1) close to the pulley groove (5) is a detection surface (12); a groove (13) is provided at a portion of the detection surface (12) corresponding to the pulley groove (5); the groove (13) comprises a groove side wall (131) and a groove bottom wall (132); one end of the groove side wall (131) is vertically connected to the detection surface (12); the other end of the groove side wall (131) is vertically connected to the groove bottom wall (132); a sliding hole (11) is provided on the groove bottom wall (132); and the sealing ring (41) is located outside the sliding hole (11).

7. A crane pulley groove wear detection device according to claim 1, characterized in that: The outer surface of the servo electric cylinder (2) is connected to one end of the clamp (6), and the other end of the clamp (6) is connected to the inner surface of the housing (1).

8. A crane pulley groove wear detection device according to claim 7, characterized in that: The servo electric cylinder (2) comprises a servo motor (21) and a lead screw (22), wherein the output end of the servo motor (21) is connected to one end of the lead screw (22), and the other end of the lead screw (22) is connected to one end of the telescopic rod (4).

9. A crane pulley groove wear detection device according to claim 8, characterized in that: A displacement sensor (23) is provided on one end of the lead screw (22); an electric wire (24) is provided on the end of the servo electric cylinder (2) away from the telescopic rod (4); the electric wire (24) passes through the housing (1) and is connected to the outer surface of the boom; and the end of the electric wire (24) away from the lead screw (22) is connected to the control module.

10. A crane pulley groove wear detection device according to claim 1, characterized in that: The housing (1) is made of stainless steel, and the detection head (3) is made of stainless steel.

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