Hoist crane structure stress detection device

Abstract

The utility model relates to the technical field of hoist cranes, and discloses a hoist crane structure stress detection device, which comprises two adjusting bases, two vertical rods of a stress test frame are sleeved on the inner surfaces of the two adjusting bases in a sliding manner, a stress test mechanism is arranged on the stress test frame, and the stress test mechanism is connected with the two vertical rods of the stress test frame. The stress testing mechanism comprises an electric hoist crane, a weight placing frame, a resistance strain patch, a resistance strain gauge, a stroke limiting controller, a hydraulic press, a hydraulic rod, a sliding groove, a threaded rod, a rotary knob, a sliding block, a supporting rod and a movable plate, and the electric hoist crane is fixedly installed on the lower surface of a transverse plate of the stress testing frame; according to the hoist crane structure stress detection device, the four moving plates can be conveniently driven by the threaded rods to fix the inner supporting circle of the weight disc, the weight disc is placed, the placement is more stable, and the hoist crane structure stress detection is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of hoist cranes, in particular to a structural stress detection device for a hoist crane. Background Art

[0002] Electric hoists are specialized lifting equipment installed on overhead cranes and gantry cranes. They are characterized by their compact size, light weight, simple operation, and ease of use. They are used in industrial and mining enterprises, warehouses, and docks. They feature a compact structure, with the motor axis perpendicular to the drum axis and a worm gear drive. Double-girder cranes with electric hoists are widely used in nuclear power, metallurgy, machinery, chemicals, petroleum, and energy industries.

[0003] The existing patent CN206893187U discloses a stress and strain test demonstration device for the metal structure of a lifting machinery, including an electric hoist gantry crane for test demonstration, a stress and strain testing device, and weights of calibrated weight. The electric hoist gantry crane for test demonstration includes a metal structure, an electric hoist, and a safety protection device. This device can test and demonstrate the stress and strain conditions of the lifting machinery at no load, rated load, and load danger points within its range, and can roughly determine the load spectrum curve of the lifting machinery under laboratory conditions. In actual use, it is necessary to replace weights of different weights to detect the stress size under different load conditions, but only one weight can be hung at a time, the weight of a single weight needs to be very large, and many weights of different weights are required, which leads to the inconvenience of replacing weights. In view of this, a hoist crane structure stress detection device is proposed. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a device for detecting stress of a hoist crane structure, which solves the problem of inconvenience in detecting stress of a crane structure.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose of convenient crane structure stress detection, the utility model provides the following technical solutions: a hoist crane structure stress detection device, comprising two adjustment bases, the inner surfaces of the two adjustment bases being slidingly sleeved with two vertical poles of a stress test frame;

[0008] The stress test frame is provided with a stress test mechanism, which includes an electric hoist crane, a weight placement frame, a resistance strain patch, a resistance strain gauge, a travel limit controller, a hydraulic device, a hydraulic rod, a slide groove, a threaded rod, a knob, a sliding block, a support rod and a moving plate;

[0009] The electric hoist crane is fixedly installed on the lower surface of the stress test frame horizontal plate, and the weight placement frame is arranged on the outer surface of the electric hoist crane hook;

[0010] The four chutes are provided on the upper surface of the weight placement rack, and the lower end of the threaded rod is rotatably connected to the upper surface of the weight placement rack;

[0011] Wherein, the knob is fixedly mounted on the upper end of the threaded rod;

[0012] The sliding block is threadedly sleeved on the outer surface of the threaded rod, and the four support rods are rotatably connected to the outer surface of the threaded rod;

[0013] The four movable plates are rotatably connected to the opposite ends of the four support rods, and the four movable plates are slidably sleeved on the inner surfaces of the four sliding grooves.

[0014] The two hydraulic machines are respectively fixedly mounted on the inner walls of the two adjustment bases, the two hydraulic rods are respectively slidably sleeved on the inner surfaces of the two hydraulic machines, and the two hydraulic rods are respectively fixedly mounted on the lower surfaces of the two vertical poles of the stress test frame;

[0015] Preferably, the resistance strain patch is fixedly mounted on the front surface of the stress test frame, the resistance strain gauge is fixedly mounted on the right surface of the stress test frame, the resistance strain patch is electrically connected to the resistance strain gauge, and the travel limit controller is fixedly mounted on the right surface of the stress test frame.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a device for detecting stress in a hoist crane structure, which has the following beneficial effects:

[0018] 1. The hoist crane structural stress detection device can conveniently drive four movable plates through threaded rods to fix the weight disc inside the support circle, so that the weight disc can be placed more stably, which is convenient for the hoist crane structural stress detection.

[0019] 2. The hoist crane structure stress detection device can drive the stress test frame to move upward through a hydraulic device, which can facilitate the stress test frame to perform stress detection on hoist cranes of different heights, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a hoist crane structure stress detection device of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the adjustable base of the utility model;

[0022] Figure 3 For this utility model Figure 2A magnified view of the structure in the middle.

[0023] In the figure: 1. Adjustment base; 2. Stress test frame; 3. Electric hoist crane; 4. Weight placement rack; 5. Resistance strain patch; 6. Resistance strain gauge; 7. Travel limit controller; 8. Hydraulic machine; 9. Hydraulic rod; 10. Slide; 11. Threaded rod; 12. Knob; 13. Sliding block; 14. Support rod; 15. Moving plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-3 The utility model provides a new technical solution: a hoist crane structure stress detection device, comprising two adjustment bases 1, the inner surfaces of the two adjustment bases 1 are slidingly sleeved with two vertical poles of a stress test frame 2;

[0026] The stress testing frame 2 is provided with a stress testing mechanism, which includes an electric hoist crane 3, a weight placement frame 4, a resistance strain patch 5, a resistance strain gauge 6, a travel limit controller 7, a hydraulic press 8, a hydraulic rod 9, a slide 10, a threaded rod 11, a knob 12, a sliding block 13, a support rod 14 and a movable plate 15;

[0027] The electric hoist crane 3 is fixedly installed on the lower surface of the horizontal plate of the stress test frame 2, and the weight placement frame 4 is arranged on the outer surface of the hook of the electric hoist crane 3;

[0028] As described above, the four chutes 10 are opened on the upper surface of the weight placement rack 4, and the lower end of the threaded rod 11 is rotatably connected to the upper surface of the weight placement rack 4;

[0029] Wherein, the knob 12 is fixedly mounted on the upper end of the threaded rod 11;

[0030] As described above, the sliding block 13 is threadedly sleeved on the outer surface of the threaded rod 11, and the four support rods 14 are all rotatably connected to the outer surface of the threaded rod 11;

[0031] The four movable plates 15 are rotatably connected to the opposite ends of the four support rods 14, and the four movable plates 15 are slidably sleeved on the inner surfaces of the four slide grooves 10.

[0032] The two hydraulic cylinders 8 are respectively fixedly installed in the inner walls of the two adjustment bases 1, the two hydraulic rods 9 are respectively slidably sleeved on the inner surfaces of the two hydraulic cylinders 8, and the two hydraulic rods 9 are respectively fixedly installed on the lower surfaces of the two vertical poles of the stress test frame 2.

[0033] Furthermore, the resistance strain patch 5 is fixedly mounted on the front surface of the stress test frame 2, the resistance strain gauge 6 is fixedly mounted on the right surface of the stress test frame 2, the resistance strain patch 5 is electrically connected to the resistance strain gauge 6, and the travel limit controller 7 is fixedly mounted on the right surface of the stress test frame 2;

[0034] When the hoist crane structural stress detection device is used, weight discs of different specifications are placed on the weight placement rack 4. At this time, by turning the knob 12, the knob 12 drives the threaded rod 11 fixedly installed on the lower surface to rotate. At this time, the sliding block 13 threadedly sleeved on the outer surface of the threaded rod 11 continues to move downward through the thread set on the outer surface of the threaded rod 11. At the same time, the sliding block 13 drives the four support rods 14 connected to the outer surface rotation to move downward. The four support rods 14 are gradually set horizontally while moving downward. At the same time, the four support rods 14 apply opposite thrusts to the four movable plates 15 connected to the opposite ends. When the four movable plates 15 move toward the opposite sides on the inner surfaces of the four slide grooves 10, the inner holes of the weight discs are pressed by the four movable plates. Support is provided to complete the fixation of the weights. At this time, the lifting and operation of the crane under different loads can be simulated, as well as the overspeed and overlimit conditions. The stress changes at the key positions of the electric hoist crane 3 can be detected by the resistance strain patch 5 and the resistance strain gauge 6, and the monitored data can be wirelessly sent to a remote computer with a wireless receiver for stress analysis. Multiple weights can be mounted to provide the required load for stress monitoring, which is more convenient. The hydraulic press 8 can be started and the hydraulic press 8 can drive the hydraulic rod 9 with a sliding sleeve on the inner surface to move upward through operation. The hydraulic rod 9 applies an upward thrust to the stress test frame fixed at the upper end to complete the height prompt, and the electric hoist crane 3 can be tested for stress monitoring at different heights.

[0035] The hoist crane structural stress detection device can conveniently drive four movable plates through threaded rods to fix the weight disc with an inner support circle, so that the weight disc can be placed more stably, which is convenient for stress detection of the hoist crane structure. The hoist crane structural stress detection device can drive the stress test frame to move upward through a hydraulic device, which can facilitate the stress test frame to perform stress detection on hoist cranes of different heights, which is more convenient.

[0036] Working principle: When the hoist crane structural stress detection device is used, weight discs of different specifications are placed on the weight placement rack 4. At this time, by turning the knob 12, the knob 12 drives the threaded rod 11 fixedly installed on the lower surface to rotate. At this time, the sliding block 13 threadedly sleeved on the outer surface of the threaded rod 11 continues to move downward through the thread set on the outer surface of the threaded rod 11. At the same time, the sliding block 13 drives the four support rods 14 connected to the outer surface to move downward. The four support rods 14 are gradually set horizontally while moving downward. At the same time, the four support rods 14 apply opposite thrusts to the four movable plates 15 connected to the opposite ends. When the four movable plates 15 move toward the opposite sides on the inner surfaces of the four slide grooves 10, the weight discs are pressed by the four movable plates. The inner hole is used to support and fix the weights. At this time, the lifting and operation of the crane under different loads can be simulated, as well as the overspeed and overlimit situations. The stress changes at the key positions of the electric hoist crane 3 can be detected by the resistance strain patch 5 and the resistance strain gauge 6, and the monitored data can be wirelessly sent to a remote computer with a wireless receiver for stress analysis. By hanging multiple weights, the required load can be provided for stress monitoring, which is more convenient. The hydraulic press 8 can be started and the hydraulic press 8 drives the hydraulic rod 9 slidingly sleeved on the inner surface to move upward. The hydraulic rod 9 applies an upward thrust to the stress test frame fixed at the upper end to complete the height prompt, and the electric hoist crane 3 can be tested for stress monitoring at different heights.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hoist crane structure stress detection device, comprising two adjustment bases (1), characterized in that: The inner surfaces of the two adjusting bases (1) are slidingly sleeved with two vertical poles of the stress test frame (2); The stress testing frame (2) is provided with a stress testing mechanism, which includes an electric hoist crane (3), a weight placement frame (4), a resistance strain patch (5), a resistance strain gauge (6), a travel limit controller (7), a hydraulic device (8), a hydraulic rod (9), a slide (10), a threaded rod (11), a knob (12), a sliding block (13), a support rod (14) and a moving plate (15); The electric hoist crane (3) is fixedly mounted on the lower surface of the horizontal plate of the stress test frame (2), and the weight placement frame (4) is arranged on the outer surface of the hook of the electric hoist crane (3); The four chutes (10) are opened on the upper surface of the weight placement rack (4), and the lower end of the threaded rod (11) is rotatably connected to the upper surface of the weight placement rack (4); Wherein, the knob (12) is fixedly mounted on the upper end of the threaded rod (11); The sliding block (13) is threadedly sleeved on the outer surface of the threaded rod (11), and the four support rods (14) are all rotatably connected to the outer surface of the threaded rod (11); The four movable plates (15) are rotatably connected to the opposite ends of the four support rods (14), and the four movable plates (15) are slidably sleeved on the inner surfaces of the four slide grooves (10); The two hydraulic machines (8) are respectively fixedly mounted on the inner walls of the two adjustment bases (1); the two hydraulic rods (9) are respectively slidably sleeved on the inner surfaces of the two hydraulic machines (8); and the two hydraulic rods (9) are respectively fixedly mounted on the lower surfaces of the two upright poles of the stress test frame (2).

2. The hoist crane structure stress detection device according to claim 1, characterized in that: The resistance strain patch (5) is fixedly mounted on the front surface of the stress test frame (2), the resistance strain gauge (6) is fixedly mounted on the right surface of the stress test frame (2), the resistance strain patch (5) and the resistance strain gauge (6) are electrically connected, and the travel limit controller (7) is fixedly mounted on the right surface of the stress test frame (2).

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