A test device for detecting the load bearing capacity of a manhole cover

Abstract

The utility model discloses a kind of test devices for manhole cover bearing capacity detection, it is related to municipal facilities detection technical field.The utility model includes base, the central place of base top end is fixedly installed with mounting bracket, the front and rear sides of mounting bracket are fixedly installed with protective window in symmetry, the central place of protective window is all limited hinged with protective door, the central place of mounting bracket top is fixedly installed with hydraulic cylinder, the central place inside the bottom of hydraulic cylinder is hingedly connected with telescopic column, the bottom of telescopic column is fixedly installed with extrusion seat.The utility model can better carry out pressure, improve the accuracy of test data, simultaneously through the design of mounting bracket front and rear sides protective window and protective door, can avoid the fragment produced in test process to cause test equipment and test personnel to cause to hit injury, in being able to to manhole cover carry out centring limit placement, improve test accuracy, simultaneously, well affect the movement of manhole cover on base, and then reduce the difficulty of manhole cover centring placement.

Description

Technical Field

[0001] This utility model relates to the field of municipal facility testing technology, specifically to a test device for testing the load-bearing capacity of manhole covers. Background Technology

[0002] Manhole covers are used to cover roads or underground facilities and manhole entrances. Their main function is to prevent people or objects from falling in accidentally, while also facilitating the inspection and maintenance of underground pipelines. In order to ensure the normal use of manhole covers, it is necessary to test their load-bearing capacity.

[0003] However, existing testing equipment for manhole cover load-bearing capacity testing still has the following shortcomings during use: 1. The existing test equipment, according to the standard design, is a top-loading method, with the manhole cover screwed on top, which is not convenient for applying pressure, reducing the accuracy of test data. In addition, no protective window is installed on the outside, and during the test, the generated fragments can easily cause injury to the test equipment and test personnel.

[0004] 2. Existing testing equipment cannot guarantee the centering and stable positioning of manhole covers when placing them, which reduces the accuracy of the test. Some existing limiting devices protrude upwards on the placement platform, which is not conducive to the movement of the manhole cover on the placement platform and increases the difficulty of centering the manhole cover. Utility Model Content

[0005] The purpose of this invention is to address the problems of the above-mentioned top-loading method where the manhole cover is screwed on top, making it inconvenient to apply pressure and reducing the accuracy of test data. Furthermore, the lack of a protective window on the outside means that fragments generated during the test can easily injure the test equipment and personnel. Additionally, some existing limiting devices protrude upwards on the placement platform, hindering the movement of the manhole cover and increasing the difficulty of centering the manhole cover. This invention provides a test device for testing the load-bearing capacity of manhole covers.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A testing device for detecting the load-bearing capacity of manhole covers includes a base. A mounting frame is fixedly installed at the center of the top of the base. Protective windows are symmetrically fixedly installed on the front and rear sides of the mounting frame. A protective door is hinged to the center of each protective window. A hydraulic cylinder is fixedly installed at the center of the top of the mounting frame. A telescopic column is driven and connected to the center of the bottom of the hydraulic cylinder. A pressing seat is fixedly installed at the bottom end of the telescopic column. A slider is slidably connected at the center of the top of the base. A limiting plate is rotatably connected to the top of each slider. A spring is fixedly connected between the inner sidewall of the limiting plate and the top sidewall of the slider. Teeth are provided at the bottom of the slider. A geared disc is rotatably connected below the slider inside the base. The top of the geared disc has helical teeth. A worm gear is rotatably connected to the right side of the geared disc inside the base, and the worm gear meshes with the geared disc. Therefore, during the rotation of the worm gear, the geared disc can be driven to rotate.

[0007] Furthermore, handles are fixedly installed on the side of the top of the protective door to facilitate opening and closing the door.

[0008] Furthermore, there are four sliders in total, which are evenly distributed on the front, back, left and right sides of the top of the base, so that two sliders are directly facing the protective doors on the front and back sides.

[0009] Furthermore, the outer side of the slider extends upward to limit the outward rotation of the limiting plate, and the limiting plate extends upward to the upper side of the base, so that the limiting plate can bend inward but cannot bend outward. Thus, during the process of the slider driving the limiting plate to retract inward, the manhole cover placed in the center can be centered and limited.

[0010] Furthermore, the teeth at the bottom of the slider mesh with the helical teeth at the top of the gear disk. Therefore, during the rotation of the gear disk, the meshing of the helical teeth with the teeth at the bottom of the slider can drive the slider to synchronously contract inward or expand outward.

[0011] Furthermore, the front end of the worm extends forward to the front side of the base, and a throttle is fixedly installed on the front end of the worm to facilitate driving the worm to rotate on the front side of the base.

[0012] Furthermore, a manhole cover is placed between the limiting plates at the top of the base.

[0013] The beneficial effects of this utility model are as follows: 1. This utility model, by installing a hydraulic cylinder on the mounting frame at the top of the base, can use the telescopic column to drive the extrusion seat to move downward to achieve the load-bearing capacity test, which can better apply pressure and improve the accuracy of test data. At the same time, the design of protective windows and protective doors on the front and rear sides of the mounting frame can prevent fragments generated during the test from causing injury to the test equipment and test personnel.

[0014] 2. This utility model utilizes the rotation of the drive gear at the bottom of the base to drive the slider to retract synchronously inward, which in turn drives the limiting plate to retract inward, thereby centering and limiting the placement of the manhole cover, improving the accuracy of the test. Furthermore, the design of the spring-loaded limiting hinge between the slider and the limiting plate allows the limiting plate to bend and retract when the manhole cover is pushed from the outside inward, without affecting the movement of the manhole cover on the base, thus reducing the difficulty of centering the manhole cover. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of the protective window after it has been removed from this utility model. Figure 4 This is an exploded three-dimensional view of the protective window of this utility model after it has been removed; Figure 5 This is a three-dimensional structural diagram of the base of this utility model; Figure 6 This is a schematic diagram of the internal three-dimensional structure of the base of this utility model; Figure 7 This is an exploded view of the internal three-dimensional structure of the base of this utility model; Figure 8 This is a three-dimensional structural diagram of the connection between the slider and the limiting plate of this utility model.

[0016] Attached reference numerals: 1. Base; 2. Mounting bracket; 3. Protective window; 4. Protective door; 41. Handle; 5. Hydraulic cylinder; 6. Telescopic column; 7. Extrusion seat; 8. Slider; 9. Limiting plate; 10. Spring; 11. Tooth; 12. Gear disc; 13. Helical tooth; 14. Worm gear; 15. Throttle; 16. Manhole cover. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] A preferred embodiment of the present invention provides a testing device for detecting the bearing capacity of manhole covers, which will be described in detail below. Figures 1-8 As shown, a test device for testing the load-bearing capacity of a manhole cover includes a base 1. A mounting frame 2 is fixedly installed at the center of the top of the base 1. Protective windows 3 are symmetrically fixedly installed on the front and rear sides of the mounting frame 2. A protective door 4 is hinged at the center of each protective window 3. A handle 41 is fixedly installed on the side of the top of each protective door 4 to facilitate opening and closing of the protective door 4.

[0019] A hydraulic cylinder 5 is fixedly installed at the center of the top of the mounting frame 2. A telescopic column 6 is connected to the center of the bottom of the hydraulic cylinder 5. A pressing seat 7 is fixedly installed at the bottom of the telescopic column 6. A slider 8 is evenly and slidably connected at the center of the top of the base 1. There are four sliders 8 in total. The four sliders 8 are evenly distributed on the front, back and left and right sides of the top of the base 1, so that two sliders 8 are directly facing the protective doors 4 on the front and back sides. The top of each slider 8 is connected to a limiting plate 9 for limiting rotation. A spring 10 is fixedly connected between the inner side wall of the limiting plate 9 and the top side wall of the slider 8. The outer side of the slider 8 extends upward, which can limit the outward rotation of the limiting plate 9. The limiting plate 9 extends upward to the upper side of the base 1, so that the limiting plate 9 can bend inward but cannot bend outward. Thus, when the slider 8 drives the limiting plate 9 to retract inward, it can center and limit the placement of the manhole cover 16. The manhole cover 16 is placed between the limiting plates 9 at the top of the base 1.

[0020] The bottom of the slider 8 is provided with teeth 11. Inside the base 1, the lower part of the slider 8 is connected to a toothed disk 12 for rotatable positioning. The top of the toothed disk 12 is provided with helical teeth 13. The teeth 11 at the bottom of the slider 8 mesh with the helical teeth 13 at the top of the toothed disk 12. Therefore, during the rotation of the toothed disk 12, the meshing of the helical teeth 13 with the teeth 11 at the bottom of the slider 8 can drive the slider 8 to synchronously retract inward or expand outward.

[0021] The right side of the gear disk 12 inside the base 1 is rotatably connected to a worm gear 14, and the worm gear 14 meshes with the gear disk 12. The front end of the worm gear 14 extends forward to the front side of the base 1, and a throttle 15 is fixedly installed at the front end of the worm gear 14, which facilitates driving the worm gear 14 to rotate on the front side of the base 1. Therefore, during the rotation of the worm gear 14, it can drive the gear disk 12 to rotate.

[0022] The working principle of this utility model is as follows: During the test, the front protective door 4 is first opened by the handle 41, and then the manhole cover 16 is placed on top of the base 1 and pushed to the right. After the manhole cover 16 contacts the front limiting plate 9, the limiting plate 9 can compress the spring 10 and bend backward into the interior of the base 1, thereby pushing the manhole cover 16 backward to the center of the base 1. After the manhole cover 16 passes the front limiting plate 9 backward, the limiting plate 9 can rotate back to the vertical state under the action of the spring 10.

[0023] After the manhole cover 16 is placed, the worm gear 14 is driven to rotate by the throttle 15 on the front side of the base 1. During the rotation of the worm gear 14, the meshing between the worm gear 14 and the gear plate 12 can drive the gear plate 12 to rotate. During the rotation of the gear plate 12, the meshing between the helical teeth 13 at the top of the gear plate 12 and the teeth 11 at the bottom of the slider 8 can drive the slider 8 to retract inward synchronously, thereby driving the limiting plate 9 to retract inward. By limiting the limiting plate 9 on the outside of the slider 8, the limiting plate 9 can contact the edge of the manhole cover 16 to squeeze the manhole cover 16, thereby achieving the centering and limiting placement of the manhole cover 16.

[0024] After the manhole cover 16 is placed in a centralized position, the protective door 4 is closed. Then, the telescopic column 6 is moved downward by the hydraulic cylinder 5, which in turn drives the extrusion seat 7 to extrude the manhole cover 16 to complete the load-bearing capacity test of the manhole cover 16.

[0025] After the test is completed, open the protective door 4, and then drive the worm gear 14 to rotate in the opposite direction by using the throttle 15, so that the limit plate 9 unfolds outward, and then remove the manhole cover 16 fragments produced after the test.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A testing device for detecting the load-bearing capacity of manhole covers, comprising a base (1), characterized in that, A mounting bracket (2) is fixedly installed at the center of the top of the base (1). Protective windows (3) are symmetrically fixedly installed on the front and rear sides of the mounting bracket (2). Protective doors (4) are hinged at the center of each protective window (3). A hydraulic cylinder (5) is fixedly installed at the center of the top of the mounting bracket (2). A telescopic column (6) is driven and connected to the center of the bottom of the hydraulic cylinder (5). A pressing seat (7) is fixedly installed at the bottom end of the telescopic column (6). A slider (8) is evenly and slidably connected at the center of the top of the base (1). The top of the slider (8) is rotatably connected to a limiting plate (9). A spring (10) is fixedly connected between the inner side wall of the limiting plate (9) and the top side wall of the slider (8). The bottom of the slider (8) is provided with teeth (11). The bottom of the slider (8) inside the base (1) is rotatably connected to a gear plate (12). The top of the gear plate (12) is provided with helical teeth (13). The right side of the gear plate (12) inside the base (1) is rotatably connected to a worm (14), and the worm (14) meshes with the gear plate (12).

2. The testing device for testing the bearing capacity of manhole covers according to claim 1, characterized in that, Each of the protective doors (4) has a handle (41) fixedly installed on the side of the top.

3. The testing device for testing the bearing capacity of manhole covers according to claim 1, characterized in that, There are four sliders (8) in total, and the four sliders (8) are evenly distributed on the front, back and left and right sides of the top of the base (1).

4. The testing device for testing the bearing capacity of manhole covers according to claim 1, characterized in that, The outer side of the slider (8) extends upward to limit the outward rotation of the limiting plate (9), and the limiting plate (9) extends upward to the upper side of the base (1).

5. The testing device for testing the bearing capacity of manhole covers according to claim 1, characterized in that, The teeth (11) at the bottom of the slider (8) mesh with the helical teeth (13) at the top of the toothed disc (12).

6. The testing device for testing the bearing capacity of manhole covers according to claim 1, characterized in that, The front end of the worm (14) extends forward to the front side of the base (1), and a throttle (15) is fixedly installed on the front end of the worm (14).

7. The testing apparatus for testing the bearing capacity of manhole covers according to any one of claims 1-6, characterized in that, A manhole cover (16) is placed between the top limiting plate (9) of the base (1).

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