A cable laying pulley load performance test device

Abstract

The application discloses a kind of cable laying with skid load performance test device, belong to skid performance test technical field.Mainly include test box, rack bottom plate, symmetrically arranged slide rail, slidingly matched placement platform and bottom baffle, and detection assembly located above, placement platform is used to bear skid, bottom baffle is used to assist support, and detection assembly is used to exert vertical load.A kind of cable laying with skid load performance test device of the application, by adjusting the relative position of placement platform and bottom baffle on slide rail, can be flexibly adapted to the support fixed space of different sizes and structure form cable skid;With lockable sliding block and self-centering structure, solve the technical problems of difficult fixing of special-shaped skid and loading center offset, effectively limit the lateral displacement or overturning of skid when being pressed, improve the stability, security and accuracy of data of load performance detection.

Description

Technical Field

[0001] This invention relates to the field of pulley performance testing technology, and in particular to a pulley load performance testing device for cable laying. Background Technology

[0002] Cable laying is a crucial step in the construction of power transmission and transformation projects. To reduce friction between cables and the ground or pipelines, prevent damage to the cable sheath, and improve construction efficiency, cable laying pulleys are commonly used. As the main component bearing the weight and traction of the cable, the structural stability and load-bearing capacity of the cable pulley directly affect the safety and quality of construction. Therefore, rigorous load-bearing performance testing must be conducted on pulleys before they are put into use or during the development of new products.

[0003] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0004] This invention provides a load performance testing device for cable laying pulleys to perform load performance testing before the pulleys are put into use, thereby ensuring the safety and quality of construction.

[0005] This invention adopts the following technical solution: a load performance testing device for cable laying trolleys. It includes a test chamber with a frame base plate at its bottom; two sets of slide rails symmetrically arranged and fixed to the upper surface of the frame base plate; a placement platform slidably mounted on the two sets of slide rails for supporting the cable trolley to be tested; and a detection component disposed within the test chamber and above the placement platform for applying a vertical load to the cable trolley placed on the placement platform. The placement platform, with its adjustable sliding fit along the slide rails, is suitable for adjusting the horizontal position of the cable trolley to be tested relative to the detection component, so that the loading center of the detection component aligns with the force center of the cable trolley, thereby adapting to the testing and positioning requirements of cable trolleys with different structural forms.

[0006] Furthermore, the detection assembly includes a lifting guide rail, a sliding seat, a hydraulic cylinder, a cantilever beam, a pressure fixture, and a pressure sensor. The lifting guide rail is vertically fixed to the inner wall of the test chamber. The sliding seat is slidably fitted onto the lifting guide rail. The hydraulic cylinder is located inside the test chamber, and its output end is connected to the sliding seat to drive it to move up and down vertically. One end of the cantilever beam is fixedly connected to the side of the sliding seat, and the other end extends upwards towards the placement platform. The pressure fixture is located below the extended end of the cantilever beam. The pressure sensor is connected between the cantilever beam and the pressure fixture to detect the pressure value applied to the cable trolley.

[0007] Furthermore, it also includes a first slider and a second slider. The first slider is fixed to the bottom surface of the bottom baffle and slides in cooperation with the slide rail. The locking element is a locking handle, which is threaded to the bottom baffle and its end is adapted to abut against the frame base plate. The second slider is fixed to the bottom surface of the placement platform and slides in cooperation with the slide rail. The second slider is provided with a platform locking element adapted to lock it on the slide rail. The side of the bottom baffle facing the placement platform is adapted to support the side wall of the cylindrical trolley, so that the cylindrical trolley overlaps between the bottom baffle and the placement platform.

[0008] Furthermore, a through groove is provided on the base plate of the frame, and an adjustment groove is correspondingly provided on the placement platform. A fixing component is provided on the bottom surface of the placement platform. The fixing component includes a mounting plate, a bearing seat, a double-acting screw, a clamping slide, and a connecting seat. The fixing component is embedded in the through groove. The mounting plate is fixed to the bottom surface of the placement platform. The double-acting screw is rotatably mounted on the bottom of the mounting plate through symmetrically arranged bearing seats. Two clamping slides are symmetrically arranged and threaded to both ends of the double-acting screw. The connecting seat is fixed to the side of the clamping slide and passes upward through the adjustment groove.

[0009] Furthermore, the fixing assembly also includes a lateral clamp, a right-angle plate, and a quick clamp. The two lateral clamps are arranged opposite each other and fixed to the upper end of the corresponding connecting seat. One end of each lateral clamp is integrally provided with an extension end. The right-angle plate has a horizontal section, which is adapted to be linearly inserted into one end of the extension end to limit the end of the linear or angled trolley. The quick clamp is provided on the upper surface of the extension end and is used to assist the right-angle plate in pressing and fixing after telescopic adjustment relative to the extension end.

[0010] Furthermore, the inner wall of the lateral clamp is provided with a receiving groove, and the fixing assembly also includes a pressing unit suitable for pressing the cylindrical trolley. The pressing unit includes a fixed base plate, a side baffle, and a lower pressing plate. The fixed base plate is fixed parallel to the receiving groove. The side baffle is hinged to one side of the fixed base plate by a vertically arranged pin and is suitable for flipping in the horizontal direction to be stored in the receiving groove. The lower pressing plate is hinged to the bottom side of the side baffle by a horizontally arranged pin and is suitable for flipping in the vertical direction to be stored in the receiving groove.

[0011] Furthermore, it also includes a centering assembly, which comprises a vertical support plate, a vertical guide rail, a lifting connecting plate, a sliding block, a lifting screw, and a servo motor. The centering assembly is disposed on the side of the cantilever beam, the vertical support plate is fixed to the side of the cantilever beam, the vertical guide rail is fixed to the side of the vertical support plate, the sliding block slides on the vertical guide rail, the lifting connecting plate is fixed on the sliding block, and the two ends of the lifting screw are rotatably disposed on the two ends of the vertical support plate through bearing seats and are threadedly connected to the lifting connecting plate to drive the lifting connecting plate to rise and fall. The servo motor is drively connected to the lifting screw.

[0012] Furthermore, the centering assembly also includes an L-shaped column, a rotating rod, a rotary motor, and a pressure head seat; the vertical end of the L-shaped column is fixed to the lifting connecting plate, the rotating rod is horizontally arranged and hinged to one horizontal end of the L-shaped column, the rotary motor is fixed to the upper surface of the horizontal end of the L-shaped column and coaxially connected to the rotating rod, and the pressure head seat is fixed to the end of the rotating rod. The rotary motor is adapted to drive the rotating rod and the pressure head seat to rotate, so that after the centering action is completed, the pressure head seat can move aside, allowing the pressure fixture above to contact the cable trolley.

[0013] Furthermore, the pressure head seat includes a mounting groove, a detection pressure roller, a wheel axle, a T-shaped guide pin, and a buffer spring; wherein, the pressure head seat is located directly below the pressure fixture, the mounting groove is symmetrically opened on both sides of the pressure head seat, two sets of detection pressure rollers are symmetrically arranged inside the pressure head seat and are movably mounted in the mounting groove through the wheel axle, the T-shaped guide pin is transversely inserted into the mounting groove and fixedly connected to the wheel axle, and the buffer spring is coaxially sleeved on the T-shaped guide pin, one end of which abuts against the inner wall of the mounting groove, and the other end abuts against the T-shaped end of the T-shaped guide pin.

[0014] Furthermore, the test chamber also includes a protective door, an opening slot, and a control panel; wherein, the protective door is hinged to the front side of the test chamber, the opening slot is formed in the side wall of the test chamber for the cantilever beam to pass through and move, and the control panel is set on the outer surface of the test chamber and electrically connected to the detection component and the centering component.

[0015] The above-mentioned at least one technical solution adopted in this invention can achieve the following beneficial effects: A cable laying trolley load performance testing device is provided. This device utilizes symmetrical slide rails laid on the base plate of a frame within a test chamber, along with a sliding platform to support the trolley under test, creating a horizontally adjustable test load position. By adjusting the position of the platform relative to the upper detection component along the slide rails, the horizontal coordinates of the cable trolley under test can be flexibly changed, ensuring precise alignment between the loading center of the detection component and the force center of cable trolleys with different structural forms. This structural design not only effectively solves the technical problem of traditional fixed positions being difficult to adapt to the testing and positioning of various specifications and irregularly shaped trolleys, improving the device's versatility and adaptability, but also avoids off-center loading during the loading process through precise center alignment, thus ensuring the effectiveness of vertical load application and the accuracy of load performance test data. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0017] In the attached diagram: Figure 1 This is an overall schematic diagram of a cable laying pulley load performance testing device according to this application; Figure 2 for Figure 1 A partial structural diagram; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the centering component structure; Figure 5 for Figure 4 Enlarged view of point B; Figure 6 for Figure 4 Front structural diagram; Figure 7 for Figure 6 Enlarged view of point C; Figure 8 for Figure 6 A partial structural diagram; Figure 9 for Figure 8 Enlarged view of point D; Figure 10 for Figure 6 A partial structural diagram; Figure 11 for Figure 10 Enlarged view of point E; Figure 12 This is a schematic diagram of the loading structure during linear trolley testing; Figure 13This is a schematic diagram of the loading structure during the inspection of a right-angle section of a corner pulley; Figure 14 This is a schematic diagram of the loading structure during the inspection of another right-angle section of the corner pulley; Figure label: 1. Test chamber; 11. Protective door; 12. Control panel; 13. Opening slot; 14. Slide rail; 15. Bottom baffle; 16. First slider; 17. Locking handle; 18. Cylindrical trolley; 19. Placement platform; 191. Adjustment slot; 192. Second slider; 110. Frame base plate; 111. Through slot; 112. Linear trolley; 113. Corner trolley; 2. Detection components; 21. Hydraulic cylinder; 22. Sliding seat; 23. Lifting guide rail; 24. Cantilever beam; 25. Pressure fixture; 26. Pressure sensor; 3. Centering components; 31. Vertical support plate; 32. Vertical guide rail; 33. Lifting connection 34. Connecting plate; 35. Sliding block; 36. Lifting screw; 37. Servo motor; 38. L-shaped column; 39. Rotating rod; 30. Rotary motor; 310. Pressure head seat; 311. Mounting slot; 32. Detection pressure roller; 33. Wheel axle; 34. T-shaped guide pin; 45. Buffer spring; 46. Fixing assembly; 47. Mounting plate; 48. Bearing seat; 49. Bidirectional screw; 40. Clamping slide; 410. Connecting seat; 42. Side clamping plate; 43. Extension end; 44. Receiving slot; 45. Fixing base plate; 46. Side baffle; 47. Lower pressure plate; 48. Right angle plate; 49. Quick clamp. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] The cable laying pulleys described in this embodiment include, but are not limited to, cylindrical pulleys for laying cables at pipe openings, corner pulleys for laying cables at wellheads with large bends, and straight pulleys.

[0021] Reference Figures 1-14 As shown, the present invention provides a test device for the load performance of a cable laying trolley, which mainly consists of a basic bearing unit, a heavy load testing component 2, a self-centering fixing component 4, and an auxiliary centering component 3.

[0022] The test chamber 1 includes a frame base plate 110 inside for stable support. A double-opening protective door 11 is hinged to the front of the test chamber 1. The door is made of transparent explosion-proof material, which ensures operational safety and facilitates observation of the internal test conditions. A control panel 12 is integrated on the outer surface of the test chamber 1. The control panel 12 integrates a PLC controller and a touch screen, which is responsible for the operation logic control and data acquisition of the entire machine.

[0023] To accommodate trolleys of different widths and types, two sets of parallel slide rails 14 are symmetrically fixed on the upper surface of the frame base plate 110. A placement platform 19 and a bottom baffle 15 slide on these two sets of slide rails 14. The bottom surface of the placement platform 19 is fixed with a second slider 192 that mates with the slide rails 14, allowing it to slide freely horizontally to find the optimal testing position. The bottom baffle 15 is located on one side of the placement platform 19, and its bottom surface is fixed with a first slider 16 that mates with the slide rails 14. The bottom baffle 15 is equipped with a manually operated locking element 17. In this embodiment, the locking element 17 is a locking handle threaded onto the bottom baffle 15. When the locking handle is rotated, its end passes through the bottom baffle 15 and abuts tightly against the frame base plate 110, using friction to lock the bottom baffle 15 at any position on the slide rails 14.

[0024] An open clamping space can be formed by sliding and adjusting the distance between the placement platform 19 and the bottom baffle 15. For example, for a cylindrical trolley 18, it can be horizontally overlapped between the bottom baffle 15 and the placement platform 19, and the side wall of the bottom baffle 15 can be used to support its cylindrical surface, effectively restricting the rotation of the cylindrical trolley 18.

[0025] To ensure that the platform 19 provides stable rigid support during heavy load testing, the second slider 192 is configured as a slider assembly with a locking function. The second slider 192 integrates a platform locking knob (not shown in the figure). The threaded end of the platform locking knob is connected to a friction block located inside or on the side of the slider. When it is necessary to fix the position of the platform, the knob is manually tightened, which drives the friction block to move toward the surface of the slide rail 14 and generate abutment. The positive pressure generated by the threaded feed creates a huge static friction force between the friction block and the surface of the slide rail 14, thereby overcoming the slippage tendency of the platform 19 under pressure and achieving frictional self-locking of the position.

[0026] To provide the load required for destructive testing, a detection component 2 is installed inside the test chamber 1, located directly above the placement platform 19. The specific structure is as follows: A lifting guide rail 23 is vertically fixed to the inner wall of the test chamber 1, on which a sliding seat 22 that can slide up and down is mounted. A hydraulic cylinder 21 is vertically installed inside the chamber, its output shaft connected to the sliding seat 22 through an opening slot 13 reserved in the side wall of the test chamber 1, driving the entire component to move up and down in a large stroke along the vertical direction (Z-axis). A cantilever beam 24 is fixed to the side of the sliding seat 22, and a pressure fixture 25 is installed on the lower side of the extended end of the cantilever beam 24. This pressure fixture 25 is typically a contoured pressure head adapted to the pulley profile, and a pressure sensor 26 is connected in series between the pressure fixture 25 and the cantilever beam 24. During the test, the hydraulic cylinder 21 drives the cantilever beam 24 downward, the pressure fixture 25 contacts the pulley of the trolley and applies pressure, and the pressure sensor 26 provides real-time feedback of the load value to the control panel 12.

[0027] To solve the problem of irregularly shaped sleds, such as providing Figures 12-14 To address the problem of difficulty in fixing the bases of the linear trolley 112 and the corner trolley 113 shown, this embodiment provides a through groove 111 on the frame base plate 110 and a corresponding adjustment groove 191 on the placement platform 19, in which a fixing component 4 is embedded and installed.

[0028] Specifically, the fixing component 4 mainly includes a drive transmission unit located at the bottom and a multi-functional clamping unit located at the top. The drive transmission unit includes a mounting plate 41, a pair of bearing seats 42, a two-way lead screw 43, and two clamping slides 44. The clamping unit includes a connecting seat 45 and a side clamping plate 46. In order to further adapt to irregular structures, the fixing component 4 is also equipped with an end limiting member composed of a right angle plate 410 and a quick clamp 411, as well as a hidden pressing unit integrated inside the side clamping plate 46, which is composed of a fixing base plate 47, a side baffle 48, and a lower pressure plate 49.

[0029] It should be noted that the quick clamp 411 is a mature, commercially available standard structural component, commonly referred to as a vertical toggle clamp. It mainly consists of a fixed base, an operating handle, a multi-link transmission mechanism, and an adjusting pressure head. Its working principle is based on the dead-point self-locking characteristic of a four-bar linkage. When the operating handle is manually pushed to a predetermined angle, the linkage mechanism passes the geometric dead point, thus maintaining a mechanical self-locking state even after the external force is removed. Adjusting the pressure head generates a continuous and stable vertical clamping force, preventing loosening due to testing vibrations.

[0030] The mounting plate 41 is fixedly suspended on the bottom surface of the placement platform 19. The bidirectional lead screw 43 is rotatably mounted on the bottom of the mounting plate 41 through the bearing seats 42 at both ends. One end of the bidirectional lead screw 43 is connected to a drive motor (not shown in the figure) through a coupling. The drive motor is located at one end of the mounting plate 41. The bidirectional lead screw 43 has two sections of threads, left-hand and right-hand, which respectively connect to two symmetrical clamping slides 44. When the lead screw rotates, the two clamping slides 44 move synchronously towards or away from each other. Each clamping slide 44 has a connecting seat 45 fixed on its side. The connecting seat 45 passes upward through the adjustment groove 191 of the placement platform 19, and a side clamping plate 46 is installed at its top.

[0031] An extension end 461 is integrally formed at one end of the lateral clamping plate 46. A guide slot (not shown in the figure) is provided on the end face of the extension end 461. An L-shaped right-angle plate 410 includes a horizontal section and a vertical section. Its horizontal section is slidably inserted into the guide slot of the extension end 461, allowing the L-shaped right-angle plate 410 to move linearly relative to the extension end 461 to accommodate trolley bases of different lengths. A quick-clamp 411 is fixedly installed on the upper surface of the extension end 461. The pressure head of the quick-clamp 411 passes through the wall of the extension end 461 or directly abuts against the upper surface of the horizontal section of the right-angle plate 410. When adjusted to the correct position, pressing down the handle of the quick-clamp 411 applies vertical pressure, locking the right-angle plate 410 in the current position. This utilizes the vertical section of the right-angle plate 410 to rigidly limit the end of the trolley base, ensuring accurate and stable axial positioning of the trolley during initial placement.

[0032] A receiving groove 462 is recessed inward on the inner sidewall surface of the side clamping plate 46, and an embedded folding and holding unit is integrated inside. The folding and holding unit includes a fixed base plate 47 fixedly installed on the bottom wall of the receiving groove 462. A side baffle 48 is hinged to one side of the fixed base plate 47 by a pin with a torsion spring, which is suitable for flipping outward in the horizontal direction. A lower pressure plate 49 is also hinged to the bottom edge of the side baffle 48 by a pin with a torsion spring, which is suitable for rotating in the vertical direction relative to the side baffle 48.

[0033] Specifically, for the testing conditions of the cylindrical trolley 18, the holding unit is in the unfolded working state by default. Specifically, the fixed base plate 47, side baffle 48 and lower pressure plate 49 are rotated outward and maintained in the unfolded posture by the damping of the torsion spring at the connection, so as to conform to the contour of the cylindrical trolley 18, and laterally limit and edge hold it, effectively preventing the trolley from tilting or rolling during the pressing process.

[0034] When it is necessary to fix other ordinary flat trolleys such as linear trolley 112 and corner trolley 113, the side baffle 48 and the lower pressure plate 49 are manually assisted by the restoring force of the torsion spring to spring back and fold, completely stored and fitted inside the receiving groove 462. At this time, the outer surface of the stored component is flat and smooth with the inner side wall of the side clamp 46, eliminating interference with the clamping plane of the side clamp 46. This allows the side clamp 46 to directly and stably clamp the two sides of the base of ordinary flat trolleys such as linear trolley 112 and corner trolley 113, thereby ensuring the universal compatibility of the device with different types of trolleys.

[0035] To ensure that the loading center and the force center of the trolley can be precisely aligned, a centering component 3 is integrated on the side of the cantilever beam 24 in this embodiment.

[0036] Specifically, the centering component 3 mainly consists of two parts: a vertical lifting drive unit responsible for precise Z-axis positioning, and a rotary contact unit responsible for positioning and avoidance. The vertical lifting drive unit includes a vertical support plate 31, a vertical guide rail 32, a lifting connecting plate 33, a sliding block 34, a lifting screw 35, and a servo motor 351. The rotary contact unit includes an L-shaped column 36, a rotating rod 37, a rotary motor 38, and a pressure head seat 39 at the end.

[0037] The vertical support plate 31 is fixedly installed on the side of the cantilever beam 24 as the basic support of the centering component 3. The vertical guide rail 32 and the lifting screw 35 are arranged parallel to each other on the vertical support plate 31. The servo motor 351 is fixed at one end of the vertical support plate 31 and is connected to the lifting screw 35 for transmission, so as to drive the lifting screw 35 to rotate, thereby driving the lifting connecting plate 33 and the sliding block 34 fixed on its bottom surface to move up and down along the guide rail, realizing the position control of the trolley under test in the vertical direction.

[0038] An L-shaped column 36 is fixed on the lifting connecting plate 33. The rotating rod 37 is horizontally hinged to the horizontal end of the L-shaped column 36 and driven by a rotary motor 38 fixed to the top of the horizontal end of the L-shaped column 36. The mechanism has two working states: In the centering stage, the rotary motor 38 drives the rotating rod 37 to rotate to the working position, so that the pressure head seat 39 at the end is directly below the pressure fixture 25 for centering detection. After centering is completed, the rotary motor 38 drives the rotating rod 37 to rotate 90 degrees (or a specific avoidance angle), and drives the pressure head seat 39 to move out of the working area so that the upper cantilever beam 24 can carry the heavy-duty pressure fixture 25 down for destructive testing.

[0039] To prevent damage to components from hard contact and ensure the accuracy of alignment data, a floating buffer design is adopted. A recessed receiving cavity is provided at the bottom of the pressure head seat 39. Mounting grooves 391 are symmetrically opened through the outer side walls on opposite sides of the pressure head seat 39. Two sets of detection pressure rollers 310 are arranged inside the receiving cavity. A wheel axle 311 is fixedly inserted through the center of the detection pressure roller 310, and the two ends of the wheel axle 311 are movably mounted in the mounting groove 391, so that the detection pressure roller 310 can move along the trajectory of the mounting groove 391. A contact pressure sensor (not shown in the figure) is embedded in the contact part between the detection pressure roller 310 and the pulley of the trolley. A T-shaped guide pin 312 is transversely inserted in the mounting groove 391 and fixedly connected to the end of the wheel axle 311. A buffer spring 313 is coaxially sleeved on the outer side of the rod of the T-shaped guide pin 312. Specifically, one end of the buffer spring 313 abuts against the inner wall of the mounting groove 391, and the other end abuts against the T-shaped head end of the T-shaped guide pin 312. When the pressure roller 310 contacts the trolley surface and is subjected to force, it drives the wheel axle 311 and the T-shaped guide pin 312 to move along the mounting groove 391 and compress the buffer spring 313, thereby allowing the pressure roller to float slightly according to the contour of the trolley surface, ensuring flexible contact and accurate feedback of the centering position.

[0040] Working principle: During actual testing, the initial placement platform 19 is in a free state. The operator places the cable trolley to be tested on the placement platform 19 and selects the appropriate fixing method according to the type of trolley. If it is a linear trolley 112 or a corner trolley 113, the control panel 12 starts the drive motor of the fixing component 4 to drive the bidirectional lead screw 43 to drive the side clamping plate 46 to center and clamp the trolley base. The right angle plate 410 on the extension end 461 and the quick clamp 411 are used to perform rigid limit locking on the trolley end after extension and retraction adjustment. If it is a cylindrical trolley 18, the folding and holding unit integrated in the inner receiving groove 462 of the side clamp 46 is in the default unfolded state, which is maintained by torsion spring damping. The specific engagement process is as follows: the side baffle 48, which is in an outward flipped posture, is directly attached to the end of the cylindrical trolley 18 to form a positioning reference on one side, which facilitates quick alignment of the cylindrical trolley 18 during initial placement; at the same time, the lower pressure plate 49, which is in a downward flipped state, directly presses against the edge of the cylindrical trolley 18 to limit the trolley from tilting vertically when pressed; at this time, the default unfolded side baffle 48 and the lower pressure plate 49, together with the bottom baffle 15, form a stable three-way constraint structure. After fixing, the placement platform 19 is manually pushed to slide along the slide rail 14 so that the force-bearing pulley of the trolley is approximately directly below the pressure fixture 25 of the detection component 2, completing the initial rough positioning.

[0041] Then, the centering component 3 is activated to perform centering detection and avoidance actions. The rotary motor 38 drives the rotating rod 37 to rotate to the working position, so that the pressure head seat 39 is between the pressure fixture 25 and the trolley. Then, the servo motor 351 drives the lifting screw 35 to rotate, which drives the pressure head seat 39 to descend smoothly until the bottom detection pressure roller 310 contacts the surface of the trolley pulley. During this process, if there is a slight left-right deviation between the trolley placed on the placement platform 19 and the pressure head seat 39, since the placement platform 19 is not locked at this time, the downward force applied by the detection pressure roller 310 causes the placement platform 19 to drive the trolley to produce a slight left-right displacement for adaptive centering; at the same time, when the two sets of detection pressure rollers 310 in the pressure head seat 39 press down to contact the pulley of the trolley, the two detection pressure rollers 310 are compressed to both sides of the buffer spring 313 through the T-shaped guide pin 312 after being subjected to force, so that the detection pressure rollers 310 produce flexible floating to avoid hard contact damage, until the built-in contact sensors are all triggered to contact, thereby confirming that the center of the pressure head seat 39 and the center of the pulley of the trolley have reached the clamping and overlapping state. After confirming that the alignment is correct, the locking knob integrated on the second slider 192 is manually tightened first, driving the friction block to move towards the surface of the slide rail 14 and generate contact. Utilizing the positive pressure generated by the threaded feed, a large static friction force is formed between the friction block and the surface of the slide rail 14, thereby overcoming the slippage tendency of the placement platform 19 under pressure and achieving frictional self-locking of the position. After the platform is locked, the servo motor 351 reverses and lifts the pressure head seat 39. Immediately afterwards, the rotary motor 38 drives the rotating rod 37 to rotate 90 degrees or a specific angle, moving the entire centering assembly 3 out of the vertical loading channel, making room for subsequent high-load tests.

[0042] Finally, a heavy-load destructive test or load performance test is performed. Hydraulic cylinder 21 is activated, driving sliding seat 22 and cantilever beam 24 vertically downwards along lifting guide rail 23, causing the heavy-load pressure fixture 25 at the end to move downwards. Since centering component 3 has completed its avoidance maneuver and placement platform 19 is in a rigidly locked state, pressure fixture 25 will directly apply a vertical load to the pulleys of the cable trolley. During loading, series pressure sensors 26 collect the current pressure value in real time and feed it back to the control panel 12 on the surface of the test chamber 1. The PLC controller records the force-deformation curve or failure peak of the trolley according to a preset program until the preset load is reached or the trolley fails. Hydraulic cylinder 21 then retracts and resets, completing a single test.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A test device for the load performance of a pulley used in cable laying, characterized in that, The test chamber (1) includes a frame base plate (110) at its bottom; two sets of slide rails (14) are symmetrically arranged and fixed on the upper surface of the frame base plate (110); a placement platform (19) is slidably arranged on the two sets of slide rails (14) for carrying the cable trolley to be tested; and a detection component (2) is arranged inside the test chamber (1) and above the placement platform (19) for applying a vertical load to the cable trolley placed on the placement platform (19). The placement platform (19) is adjustable along the slide rails (14) to adjust the horizontal position of the cable trolley to be tested relative to the detection component (2) so that the loading center of the detection component (2) is aligned with the force center of the cable trolley, thereby adapting to the test positioning requirements of cable trolleys with different structural forms. The detection component (2) includes a lifting guide rail (23), a sliding seat (22), a hydraulic cylinder (21), a cantilever beam (24), a pressure fixture (25), and a pressure sensor (26). The lifting guide rail (23) is vertically fixed on the inner wall of the test chamber (1). The sliding seat (22) is slidably fitted on the lifting guide rail (23). The hydraulic cylinder (21) is located inside the test chamber (1), and its output end is connected to the sliding seat (22) to drive it to rise and fall vertically. One end of the cantilever beam (24) is fixedly connected to the side of the sliding seat (22), and the other end extends upward toward the placement platform (19). The pressure fixture (25) is located below the extended end of the cantilever beam (24). The pressure sensor (26) is connected between the cantilever beam (24) and the pressure fixture (25) to detect the pressure value applied to the cable trolley. It also includes a centering component (3), which includes a vertical support plate (31), a vertical guide rail (32), a lifting connecting plate (33), a sliding block (34), a lifting screw (35), and a servo motor (351). The centering component (3) is disposed on the side of the cantilever beam (24). The vertical support plate (31) is fixed on the side of the cantilever beam (24). The vertical guide rail (32) is fixed on the side of the vertical support plate (31). The sliding block (34) slides on the vertical guide rail (32). The lifting connecting plate (33) is fixed on the sliding block (34). The two ends of the lifting screw (35) are rotatably disposed on the two ends of the vertical support plate (31) through bearing seats and are threadedly connected to the lifting connecting plate (33) to drive the lifting connecting plate (33) to rise and fall. The servo motor (351) is connected to the lifting screw (35) in a transmission connection.

2. The cable laying pulley load performance testing device according to claim 1, characterized in that: It also includes a bottom baffle (15), a first slider (16), a second slider (192), and a locking member (17); the bottom baffle (15) is slidably disposed on the two sets of slide rails (14) and located on one side of the placement platform (19); the first slider (16) is fixed to the bottom surface of the bottom baffle (15) and slides in cooperation with the slide rails (14); the locking member (17) is constructed as a locking handle and is threadedly connected to the bottom baffle (15). And its end is adapted to abut against the frame base plate (110), the second slider (192) is fixed to the bottom surface of the placement platform (19) and slides in cooperation with the slide rail (14), the second slider (192) is provided with a platform locking member adapted to lock it on the slide rail (14); the side of the bottom baffle (15) facing the placement platform (19) is adapted to support the side wall of the cylindrical trolley, so that the cylindrical trolley overlaps between the bottom baffle (15) and the placement platform (19).

3. The cable laying pulley load performance testing device according to claim 1, characterized in that: A through groove (111) is provided on the frame base plate (110), and an adjustment groove (191) is provided on the placement platform (19) accordingly. A fixing component (4) is provided on the bottom surface of the placement platform (19). The fixing component (4) includes a mounting plate (41), a bearing seat (42), a double-acting screw (43), a clamping slide (44), and a connecting seat (45). The fixing component (4) is embedded in the through groove (111). The mounting plate (41) is fixed on the bottom surface of the placement platform (19). The double-acting screw (43) is rotatably mounted on the bottom of the mounting plate (41) through the symmetrically arranged bearing seat (42). The two clamping slides (44) are symmetrically arranged and are threaded to both ends of the double-acting screw (43). The connecting seat (45) is fixed to the side of the clamping slide (44) and passes upward through the adjustment groove (191).

4. The cable laying pulley load performance testing device according to claim 3, characterized in that: The fixing component (4) also includes a side clamp (46), a right angle plate (410), and a quick clamp (411). The two side clamps (46) are arranged opposite to each other and are respectively fixed to the upper end of the corresponding connecting seat (45). One end of the side clamp (46) is integrally provided with an extension end (461). The right angle plate (410) has a horizontal section, which is suitable for linearly moving into one end of the extension end (461) to limit the end of the linear trolley or the corner trolley. The quick clamp (411) is provided on the upper surface of the extension end (461) and is used to assist the right angle plate (410) in pressing and fixing after telescopic adjustment relative to the extension end (461).

5. The cable laying pulley load performance testing device according to claim 4, characterized in that: The inner wall of the side clamp (46) is provided with a receiving groove (462). The fixing assembly (4) also includes a pressing unit suitable for pressing the cylindrical trolley. The pressing unit includes a fixing base plate (47), a side baffle (48) and a lower pressing plate (49). The fixing base plate (47) is fixed in parallel in the receiving groove (462). The side baffle (48) is hinged to one side of the fixing base plate (47) by a vertically arranged pin and is suitable for flipping in the horizontal direction to be stored in the receiving groove (462). The lower pressing plate (49) is hinged to the bottom side of the side baffle (48) by a horizontally arranged pin and is suitable for flipping in the vertical direction to be stored in the receiving groove (462).

6. The cable laying pulley load performance testing device according to claim 1, characterized in that: The centering assembly (3) also includes an L-shaped column (36), a rotating rod (37), a rotary motor (38), and a pressure head seat (39). The vertical end of the L-shaped column (36) is fixed on the lifting connecting plate (33). The rotating rod (37) is horizontally arranged and hinged to one horizontal end of the L-shaped column (36). The rotary motor (38) is fixed on the upper surface of the horizontal end of the L-shaped column (36) and coaxially connected with the rotating rod (37). The pressure head seat (39) is fixed at the end of the rotating rod (37). The rotary motor (38) is adapted to drive the rotating rod (37) and the pressure head seat (39) to rotate so that after the centering action is completed, the pressure head seat (39) can move aside so that the pressure fixture (25) above can contact the cable trolley.

7. The cable laying pulley load performance testing device according to claim 6, characterized in that: The pressure head seat (39) includes a mounting groove (391), a detection pressure roller (310), a wheel axle (311), a T-shaped guide pin (312), and a buffer spring (313). The pressure head seat (39) is located directly below the pressure tool (25). The mounting groove (391) is symmetrically opened on both sides of the pressure head seat (39). Two sets of detection pressure rollers (310) are symmetrically arranged inside the pressure head seat (39) and are movably installed in the mounting groove (391) through the wheel axle (311). The T-shaped guide pin (312) is transversely inserted into the mounting groove (391) and fixedly connected to the wheel axle (311). The buffer spring (313) is coaxially sleeved on the T-shaped guide pin (312), with one end abutting against the inner wall of the mounting groove (391) and the other end abutting against the T-shaped end of the T-shaped guide pin (312).

8. The cable laying pulley load performance testing device according to claim 1, characterized in that: The test chamber (1) also includes a protective door (11), an opening slot (13), and a control panel (12); wherein the protective door (11) is hinged to the front side of the test chamber (1), the opening slot (13) is opened on the side wall of the test chamber (1) for the cantilever beam (24) to pass through and move, and the control panel (12) is set on the outer surface of the test chamber (1) and electrically connected to the detection component (2) and the centering component (3).

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