A test device for testing the bending resistance of a segment

Abstract

This utility model discloses a tunnel segment bending resistance testing device, relating to the field of tunnel segment testing. It includes a support platform, a translation mechanism on the top of the support platform, a bidirectional adjustment mechanism on the translation mechanism, and two symmetrically arranged support mechanisms on the bidirectional adjustment mechanism. Each support mechanism includes a slide table. The bidirectional adjustment mechanism drives the two slide tables to move relative to each other. A support base is slidably connected to the top of the slide table, and a rotating shaft is rotatably connected inside the support base. A support plate is fixedly connected to the rotating shaft, and the support base is equipped with an angle locking mechanism for controlling the rotation of the rotating shaft. The advantages are: adjusting the distance between the two slide tables via a bidirectional screw eliminates the need for manual pushing of the slide tables, saving time and effort and improving safety. Furthermore, the bidirectional screw can lock the distance between the two slide tables, eliminating the need for separate adjustment of the slide table positions when testing tunnel segments of the same size, thus saving installation steps and increasing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tunnel segment testing, and in particular to a tunnel segment bending resistance testing device. Background Technology

[0002] Shield tunnel segments are the main assembly components in shield tunneling construction, forming the innermost barrier of the tunnel and bearing the responsibility of resisting soil pressure, groundwater pressure, and other special loads. Shield tunnel segments are the permanent lining structure of shield tunnels, and their quality directly affects the overall quality and safety of the tunnel, influencing its waterproofing and durability. Before use, the segments need to undergo bending resistance testing. This is done by placing both ends of the segment on a sliding platform and applying downward pressure to the top of the segment using a hydraulic cylinder. For example, patent document CN221100355U discloses a bending resistance testing device for precast concrete tunnel segments. This device uses a jack to drive a load arm downwards, which applies downward pressure to the segment. Sensors collect the data to perform the bending resistance test.

[0003] Currently, the tunnel segments are hoisted onto the testing device using hoisting equipment. First, both ends of the tunnel segment need to be placed on two sliding platforms. Then, the tunnel segment is moved under the hydraulic cylinder. During the installation of the tunnel segment, the distance between the two sliding platforms needs to be pre-adjusted according to the size of the tunnel segment. Usually, the sliding platforms are pushed manually. However, since the two sliding platforms move independently, at least two people are needed to control the position of the sliding platforms during each test. This is not only time-consuming and laborious, but also poses a significant risk because the workers are positioned below the tunnel segment when placing it on the sliding platform. Utility Model Content

[0004] The purpose of this invention is to provide a test device for testing the bending resistance of pipe segments in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A segment bending resistance testing device includes a support platform, a pressure testing mechanism on the top of the support platform, a translation mechanism on the top of the support platform, a bidirectional adjustment mechanism on the translation mechanism, the translation mechanism being used to drive the bidirectional adjustment mechanism to move back and forth, two symmetrically arranged support mechanisms on the bidirectional adjustment mechanism, each support mechanism including a slide table, the bidirectional adjustment mechanism being used to drive the two slide tables to move relative to each other, a support base slidably connected to the top of the slide table, a rotating shaft rotatably connected inside the support base, a support plate fixedly connected to the rotating shaft, and an angle locking mechanism on the support base for controlling the rotation of the rotating shaft.

[0007] Preferably, the angle locking mechanism includes a worm gear, which is fixedly connected to the front end of the rotating shaft. The worm gear meshes with a worm, which is connected to the front side of the support seat through a bearing seat. A handle is fixedly connected to one end of the worm.

[0008] Preferably, the bidirectional adjustment mechanism includes a mounting base, a second motor fixedly connected to one side of the mounting base, a bidirectional lead screw fixedly connected to the output shaft of the second motor, the bidirectional lead screw being rotatably connected to the mounting base, second guide rods being provided on the front and rear sides of the bidirectional lead screw, the second guide rods being fixedly connected to the mounting base, a slide being threadedly connected to the bidirectional lead screw, and the slide being slidably connected to the second guide rods.

[0009] Preferably, the translation mechanism includes a first motor, which is fixedly connected to the front side of the support platform. A one-way lead screw is fixedly connected to the output end of the first motor. The one-way lead screw is connected to the top of the support platform through a bearing seat. A translation seat is threaded onto the one-way lead screw. A first guide rod is slidably connected inside the translation seat. The first guide rod is fixedly connected to the top of the support platform. A mounting seat is fixedly connected to the top of the translation seat.

[0010] Preferably, the bidirectional lead screw and the unidirectional lead screw are arranged perpendicularly.

[0011] Preferably, the pressure testing mechanism includes two reaction arms, which are fixedly connected to the top of the support platform. A cross arm is fixedly connected between the reaction arms, and a hydraulic cylinder is fixedly connected to the bottom of the cross arm. A load arm is fixedly connected to the output end of the hydraulic cylinder.

[0012] The beneficial effects are as follows: Adjusting the distance between the two slides via a bidirectional lead screw eliminates the need for manual movement, saving time and effort and improving safety. Furthermore, the bidirectional lead screw can lock the distance between the two slides, eliminating the need for separate slide position adjustments when inspecting segments of the same size, thus saving installation steps and increasing efficiency. The angle locking mechanism allows for quick adjustment of the support plate's tilt angle to accommodate segments of different sizes, enhancing versatility.

[0013] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a perspective view of the segment bending resistance testing device described in this utility model;

[0016] Figure 2 This is a front view of the segment bending resistance testing device described in this utility model;

[0017] Figure 3 This is a perspective view of the bidirectional adjustment mechanism of the segment bending resistance testing device described in this utility model;

[0018] Figure 4 This utility model describes a segment bending resistance testing device. Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a front sectional view of the support mechanism of the segment bending resistance testing device described in this utility model;

[0020] Figure 6 This is a perspective view of the translation mechanism of the segment bending resistance testing device described in this utility model.

[0021] The reference numerals in the attached drawings are explained as follows: 1. Support platform; 2. Pressure detection mechanism; 201. Reaction arm; 202. Cross arm; 203. Hydraulic cylinder; 204. Load arm; 3. Translation mechanism; 301. First motor; 302. One-way lead screw; 303. Translation seat; 304. First guide rod; 4. Two-way adjustment mechanism; 401. Mounting seat; 402. Second motor; 403. Two-way lead screw; 404. Second guide rod; 5. Support mechanism; 501. Slide table; 502. Support seat; 503. Rotating shaft; 504. Support plate; 6. Angle locking mechanism; 601. Worm gear; 602. Worm; 603. Handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1-6As shown, a segment bending resistance testing device includes a support platform 1, a pressure testing mechanism 2 on the top of the support platform 1, a translation mechanism 3 on the top of the support platform 1, a bidirectional adjustment mechanism 4 on the translation mechanism 3, the translation mechanism 3 being used to drive the bidirectional adjustment mechanism 4 to move back and forth, two symmetrically arranged support mechanisms 5 on the bidirectional adjustment mechanism 4, each support mechanism 5 including a slide table 501, the bidirectional adjustment mechanism 4 being used to drive the two slide tables 501 to move relative to each other, a support seat 502 slidably connected to the top of the slide table 501, a rotating shaft 503 connected to the support seat 502 via a bearing, a support plate 504 welded to the rotating shaft 503, the support plate 504 being used to support the sides of both ends of the segment, for segments of different sizes, the support plate 504 needs to be adjusted to a suitable tilt angle, the support seat 502 is provided with an angle locking mechanism 6 for controlling the rotation of the rotating shaft 503.

[0026] The angle locking mechanism 6 includes a worm gear 601, which is fixedly connected to the front end of the rotating shaft 503. The worm gear 601 meshes with a worm 602, which is connected to the front side of the support base 502 through a bearing seat. A handle 603 is fixedly connected to one end of the worm 602. Since the worm gear 601 cannot drive the worm 602 to rotate, the support plate 504 can be kept fixed after adjusting it to a suitable angle.

[0027] The bidirectional adjustment mechanism 4 includes a mounting base 401. A second motor 402 is bolted to one side of the mounting base 401. The output shaft of the second motor 402 is connected to a bidirectional lead screw 403 via a coupling. The bidirectional lead screw 403 is connected to the mounting base 401 via bearings. Second guide rods 404 are provided on the front and rear sides of the bidirectional lead screw 403. The second guide rods 404 are fixedly connected to the mounting base 401. The slide table 501 is threadedly connected to the bidirectional lead screw 403 and slidably connected to the second guide rods 404. When the bidirectional lead screw 403 rotates, it drives the two slide tables 501 to move closer or further apart, thus adjusting the distance between the two support plates 504 to accommodate segments of different sizes. In addition, the bidirectional lead screw 403 can maintain the distance between the two slide tables 501. For segments of the same size, it is not necessary to adjust the position of the slide tables 501 each time, thereby improving the installation speed of the segments, making the inspection more efficient, and making the use more convenient.

[0028] The translation mechanism 3 includes a first motor 301, which is bolted to the front of the support platform 1. The output end of the first motor 301 is connected to a one-way lead screw 302 via a coupling. The one-way lead screw 302 is connected to the top of the support platform 1 via a bearing seat. A translation seat 303 is threaded onto the one-way lead screw 302. A first guide rod 304 is slidably connected inside the translation seat 303. The first guide rod 304 is fixedly connected to the top of the support platform 1. A mounting seat 401 is fixedly connected to the top of the translation seat 303. The two-way lead screw 403 is set perpendicular to the one-way lead screw 302. This arrangement allows the two slides 501 to move left and right, and the mounting seat 401 to move back and forth, which can shorten the overall length of the device and facilitate the loading of segments.

[0029] The pressure testing mechanism 2 includes two reaction arms 201, which are fixedly connected to the top of the support platform 1. A horizontal arm 202 is fixedly connected between the reaction arms 201. A hydraulic cylinder 203 is fixedly connected to the bottom of the horizontal arm 202. A load arm 204 is fixedly connected to the output end of the hydraulic cylinder 203.

[0030] Working principle: In use, first position the mounting base 401 at the front end of the support platform 1. Use hoisting equipment to lift the pipe segment between the two support plates 504. Place both ends of the pipe segment on top of the support base 502, and ensure the support plates 504 abut against the sides of both ends of the pipe segment. This completes the pipe segment installation. Before installing the pipe segment, manually push the support base 502 to slide it on the slide table 501, bringing the two support bases 502 closer together. The friction between the support base 502 and the slide table 501 keeps the support base 502 stationary. This design allows for movement space for the support 502 during bending. After the tube segment is installed, the first motor 301 drives the one-way screw 302 to rotate. The one-way screw 302 drives the translation seat 303 to move backward, which in turn moves the mounting seat 401 backward, thus moving the tube segment below the load arm 204. Then, the hydraulic cylinder 203 drives the load arm 204 to move downward, applying pressure to the tube segment. During the experiment, various sensors collect experimental data of the tube segment. This is existing technology and will not be elaborated further. All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a computer or other conventionally known control device, which will not be elaborated further.

[0031] After testing, the segment is moved back to the front end and disassembled with the hoisting equipment. For segments of the same size, there is no need to readjust the distance between the two support plates 504; the segment to be tested can be directly loaded between the support plates 504. For segments of different sizes, the second motor 402 drives the bidirectional lead screw 403 to rotate, which in turn drives the two slides 501 to move away from or closer to each other, thereby adjusting the distance between the two support plates 504. Then, the handle 603 rotates the worm gear 602, which drives the worm wheel 601 to rotate. The worm wheel 601 drives the rotating shaft 503 to rotate, which in turn drives the support plate 504 to rotate, thereby adjusting the tilt angle of the support plate 504 to accommodate segments of different sizes, thus improving versatility.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A segment bending resistance testing device, comprising a support platform (1), wherein a pressure testing mechanism (2) is provided on the top of the support platform (1), characterized in that: The top of the support platform (1) is provided with a translation mechanism (3), and the translation mechanism (3) is provided with a bidirectional adjustment mechanism (4). The translation mechanism (3) is used to drive the bidirectional adjustment mechanism (4) to move back and forth. The bidirectional adjustment mechanism (4) is provided with two support mechanisms (5) arranged symmetrically on the left and right. The support mechanism (5) includes a slide (501). The bidirectional adjustment mechanism (4) is used to drive the two slides (501) to move relative to each other. The top of the slide (501) is slidably connected to a support seat (502). The support seat (502) is rotatably connected to a rotating shaft (503). The rotating shaft (503) is fixedly connected to a support plate (504). The support seat (502) is provided with an angle locking mechanism (6) for controlling the rotation of the rotating shaft (503).

2. The segment bending resistance testing device according to claim 1, characterized in that: The angle locking mechanism (6) includes a worm gear (601), which is fixedly connected to the front end of the rotating shaft (503). The worm gear (601) meshes with a worm (602), which is connected to the front side of the support base (502) through a bearing seat. A handle (603) is fixedly connected to one end of the worm (602).

3. The segment bending resistance testing device according to claim 1, characterized in that: The bidirectional adjustment mechanism (4) includes a mounting base (401), a second motor (402) is fixedly connected to one side of the mounting base (401), a bidirectional lead screw (403) is fixedly connected to the output shaft of the second motor (402), the bidirectional lead screw (403) is rotatably connected to the mounting base (401), and second guide rods (404) are provided on the front and rear sides of the bidirectional lead screw (403). The second guide rods (404) are fixedly connected to the mounting base (401), the slide (501) is threadedly connected to the bidirectional lead screw (403), and the slide (501) is slidably connected to the second guide rods (404).

4. The segment bending resistance testing device according to claim 3, characterized in that: The translation mechanism (3) includes a first motor (301), which is fixedly connected to the front side of the support platform (1). A one-way lead screw (302) is fixedly connected to the output end of the first motor (301). The one-way lead screw (302) is connected to the top of the support platform (1) through a bearing seat. A translation seat (303) is threadedly connected to the one-way lead screw (302). A first guide rod (304) is slidably connected inside the translation seat (303). The first guide rod (304) is fixedly connected to the top of the support platform (1). The mounting seat (401) is fixedly connected to the top of the translation seat (303).

5. The segment bending resistance testing device according to claim 4, characterized in that: The bidirectional lead screw (403) is arranged perpendicularly to the unidirectional lead screw (302).

6. The segment bending resistance testing device according to claim 1, characterized in that: The pressure testing mechanism (2) includes two reaction arms (201), which are fixedly connected to the top of the support platform (1). A cross arm (202) is fixedly connected between the reaction arms (201), and a hydraulic cylinder (203) is fixedly connected to the bottom of the cross arm (202). A load arm (204) is fixedly connected to the output end of the hydraulic cylinder (203).

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