A displacement sensor fixing device for in-situ static load test of precast stairs

Abstract

This utility model discloses a displacement sensor fixing device for in-situ static load testing of precast stairs. This device aims to solve the problem that existing displacement sensors are typically fixed using cable ties or tape, which is not only insecure but also cumbersome to install, reducing work efficiency. The device includes a universal magnetic base and a displacement sensor. A first clamp is fixedly connected to the right side of the universal magnetic base. A first upright is fixedly connected to the first clamp by a first locking screw. A second upright is mounted on the top of the first upright via a ball joint assembly. This utility model attaches the universal magnetic base to the steel pipe supporting the precast stairs, then fixes the displacement sensor to the second clamp by a second locking screw. Finally, the measuring head of the displacement sensor is adjusted to approach the precast stairs using the first locking screw, the ball joint assembly, and a third locking screw, quickly completing the installation of the displacement sensor and improving installation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of static load testing technology for prefabricated stairs, specifically relating to a displacement sensor fixing device for in-situ static load testing of prefabricated stairs. Background Technology

[0002] With the rapid development of the construction industry, prefabricated buildings have been widely used in modern construction due to their advantages such as high efficiency, environmental protection, and energy saving. Prefabricated stairs, as an important component of prefabricated buildings, are increasingly used in various construction projects due to their advantages such as fast construction speed, controllable quality, and saving on-site construction space. However, the quality of prefabricated stairs directly affects the safety and stability of the building. Therefore, static load testing is one of the important methods to evaluate the load-bearing capacity and deformation performance of prefabricated stairs. Static load tests using displacement sensors can obtain data such as stress, strain, and displacement of prefabricated stairs under different loads, thereby determining whether they meet design requirements and relevant standards.

[0003] Existing displacement sensors are usually fixed by wrapping them with cable ties or tape around the steel pipes supporting the prefabricated stairs. This method is not only not secure, but also cumbersome to install and has poor adaptability. As a result, a lot of time is spent adjusting the displacement sensor, which causes inconvenience to subsequent work and reduces installation efficiency. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fixing device for displacement sensors in in-situ static load tests of prefabricated stairs. This device aims to solve the problem that the existing displacement sensors are usually fixed by cable ties or tape, which is not only not secure, but also cumbersome to install and reduces work efficiency.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a displacement sensor fixing device for in-situ static load testing of prefabricated stairs. The device includes a universal magnetic base and a displacement sensor. A first clamp is fixedly connected to the right side of the universal magnetic base. A first upright is fixedly connected to the first clamp by a first locking screw. A second upright is provided at the top of the first upright through a ball joint assembly. A hinge is fixedly connected to the top of the second upright. The hinge is fixedly connected to the second clamp by a third locking screw. The displacement sensor is fixedly connected to the other end of the second clamp by a second locking screw.

[0008] Preferably, the spherical connecting assembly includes a mounting base fixedly connected to the top end of the first upright, the top end of the mounting base having a spherical groove, a ball being rotatably connected inside the spherical groove, the bottom end of the second upright being fixedly connected to the ball, a locking cap being threadedly connected to the top end of the mounting base, and a through hole being formed on the upper surface of the locking cap and a rubber ring being fixedly connected thereto.

[0009] Furthermore, the second upright includes an upper upright and a lower upright. A rectangular rod is fixedly connected to the lower surface of the upper upright, and a rectangular hole is opened on the upper surface of the lower upright. The rectangular rod is slidably inserted into the interior of the rectangular hole. An adjusting sleeve is threadedly connected to the outer surface of the upper and lower uprights that are close to each other. The inner walls of the upper and lower sides of the adjusting sleeve are respectively provided with left-hand threads and right-hand threads.

[0010] Furthermore, the first clamp has a first circular hole, and the side of the first clamp has a first through slot communicating with the first circular hole. The first upright is located inside the first circular hole, and the first locking screw passes through the front side of the first through slot and is threaded to the rear side of the first through slot.

[0011] Furthermore, a U-shaped groove is provided on one side of the second clamp, the hinge seat is located inside the U-shaped groove, and the third locking screw passes through the front inner wall of the U-shaped groove and the hinge seat and is threaded to the rear side of the U-shaped groove.

[0012] Furthermore, the displacement sensor includes a sensor body, a mounting post, and a measuring head, with a display screen on the front of the sensor body.

[0013] Furthermore, the second clamp has a second circular hole, and the side of the second clamp has a second through slot communicating with the second circular hole. The mounting post is located inside the second circular hole, and the second locking screw passes through the front side of the second through slot and is threaded to the rear side of the second through slot.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention uses a universal magnetic base to firmly attach the fixing device to the steel pipe supporting the precast staircase. Then, the displacement sensor is fixed to the second clamp by the second locking screw. Next, the measuring head of the displacement sensor is adjusted to approach the precast staircase by the first locking screw, the ball joint assembly, and the third locking screw. Then, the lower upright is grasped and the adjusting sleeve is rotated to make the second clamp and the measuring head of the displacement sensor contact the precast staircase, thereby accurately adjusting the position of the displacement sensor and quickly completing the installation of the displacement sensor, improving installation efficiency. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention.

[0019] Figure 3 This is a cross-sectional structural diagram of the spherical connecting component of this utility model.

[0020] Figure 4 This is a cross-sectional structural diagram of the second upright of this utility model.

[0021] Figure 5 This is the utility model Figure 2 A magnified structural diagram of point A in the middle.

[0022] Figure 6 This is the utility model Figure 2 A magnified structural diagram at point B in the middle.

[0023] The labels in the attached diagram are as follows: 1. Universal magnetic base; 2. Displacement sensor; 3. First clamp; 4. First locking screw; 5. First upright; 6. Spherical connecting assembly; 7. Second upright; 8. Hinge base; 9. Third locking screw; 10. Second clamp; 11. Second locking screw; 601. Mounting base; 602. Spherical groove; 603. Sphere; 604. Locking cap; 605. Rubber ring; 701. Upper upright; 702. Lower upright; 703. Rectangular hole; 704. Rectangular rod; 705. Adjusting sleeve; 301. First circular hole; 302. First through slot; 201. Sensor body; 202. Mounting post; 203. Measuring head; 204. Display screen; 1001. U-shaped groove; 1002. Second circular hole; 1003. Second through slot. Detailed Implementation

[0024] This specific embodiment is a prefabricated staircase in-situ static load test displacement sensor fixing device, the structural schematic diagram of which is shown below. Figures 1-6 As shown, the device includes a universal magnetic base 1 and a displacement sensor 2. The universal magnetic base 1 is a universal magnetic dial indicator base, which is widely used in various machine tools to support measuring instruments such as dial indicators. It can be fixed in position by magnetic force through a knob switch. The displacement sensor 2 is a digital micrometer. A first clamp 3 is fixedly connected to the right side of the universal magnetic base 1. A first upright 5 is fixedly connected to the first clamp 3 by a first locking screw 4. A second upright 7 is set at the top of the first upright 5 through a ball joint assembly 6. A hinge 8 is fixedly connected to the top of the second upright 7. A second clamp 10 is fixedly connected to the hinge 8 by a third locking screw 9. The displacement sensor 2 is fixedly connected to the other end of the second clamp 10 by a second locking screw 11.

[0025] like Figure 1 and Figure 3 As shown: In this embodiment, the spherical connecting assembly 6 includes a mounting base 601 fixedly connected to the top of the first upright 5. A spherical groove 602 is provided inside the top of the mounting base 601. A ball 603 is rotatably connected inside the spherical groove 602. The bottom end of the second upright 7 is fixedly connected to the ball 603. A locking cap 604 is threadedly connected to the top of the mounting base 601. A through hole is provided on the upper surface of the locking cap 604 and a rubber ring 605 is fixedly connected thereto.

[0026] The sphere 603 can rotate freely inside the spherical groove 602 and will not detach when lubricated. This allows for universal adjustment between the first upright 5 and the second upright 7. After adjusting the second upright 7 to a suitable angle, the locking cap 604 is rotated. Since the locking cap 604 is threadedly connected to the mounting base 601, the locking cap 604 can drive the rubber ring 605 to move downwards during rotation until the rubber ring 605 contacts and fixes the sphere 603, thereby preventing the second upright 7 from rotating.

[0027] like Figure 2 and Figure 4 As shown: In this embodiment, the second upright 7 includes an upper upright 701 and a lower upright 702. A rectangular rod 704 is fixedly connected to the lower surface of the upper upright 701. A rectangular hole 703 is opened on the upper surface of the lower upright 702. The rectangular rod 704 is slidably inserted into the interior of the rectangular hole 703. An adjusting sleeve 705 is threadedly connected to the outer surface of the upper upright 701 and the lower upright 702 that are close to each other. The upper and lower inner walls of the adjusting sleeve 705 are respectively provided with left-hand threads and right-hand threads.

[0028] By grasping the lower upright 702 and rotating the adjusting sleeve 705, the upper and lower inner walls of the adjusting sleeve 705 are respectively provided with left-hand and right-hand threads, and both the upper upright 701 and the lower upright 702 are threadedly connected to the adjusting sleeve 705. At the same time, the rectangular rod 704 of the upper upright 701 is slidably inserted into the rectangular hole 703 of the lower upright 702, preventing the upper upright 701 from rotating. During the rotation of the adjusting sleeve 705, the upper upright 701 can be moved away from the lower upright 702. At this time, the upper upright 701 drives the second clamp 10 and the measuring head 203 of the displacement sensor 2 to contact the prefabricated stairs, thereby accurately adjusting the position of the displacement sensor 2.

[0029] like Figure 2 and Figure 5As shown: In this embodiment, the first clamp 3 has a first circular hole 301, and the side of the first clamp 3 has a first through slot 302 communicating with the first circular hole 301. The first upright 5 is located inside the first circular hole 301. The first locking screw 4 passes through the front side of the first through slot 302 and is threadedly connected to the rear side of the first through slot 302. By loosening the first locking screw 4, the first upright 5 can move up and down in the first circular hole 301. Then, by tightening the first locking screw 4, the first upright 5 is fixed in the first circular hole 301.

[0030] like Figure 2 and Figure 6 As shown: In this embodiment, a U-shaped groove 1001 is provided on one side of the second clamp 10, and the hinge seat 8 is located inside the U-shaped groove 1001. The third locking screw 9 passes through the front inner wall of the U-shaped groove 1001 and the hinge seat 8 and is threaded to the rear side of the U-shaped groove 1001. By loosening the third locking screw 9, the hinge seat 8 can be rotated in the U-shaped groove 1001. Then, by tightening the third locking screw 9, the hinge seat 8 is fixed in the U-shaped groove 1001, thereby fixing the second upright 7 and the second clamp 10.

[0031] like Figure 2 and Figure 6 As shown: In this embodiment, the displacement sensor 2 includes a sensor body 201, a mounting column 202 and a measuring head 203. The front of the sensor body 201 is provided with a display screen 204. The measuring head 203 can move and contact the prefabricated staircase. The displacement is displayed on the display screen 204.

[0032] like Figure 4 and Figure 6 As shown: In this embodiment, the second clamp 10 has a second circular hole 1002, and the side of the second clamp 10 has a second through slot 1003 communicating with the second circular hole 1002. The mounting post 202 is located inside the second circular hole 1002. The second locking screw 11 passes through the front side of the second through slot 1003 and is threaded to the rear side of the second through slot 1003. By loosening the second locking screw 11, the mounting post 202 can be installed in the second circular hole 1002. Then, by tightening the second locking screw 11, the mounting post 202 is fixed in the second circular hole 1002, thereby fixing the displacement sensor 2.

[0033] Working principle: By rotating the knob switch, the magnet inside the universal magnetic seat 1 rotates to the middle position, forming a closed magnetic field line, which firmly attaches the universal magnetic seat 1 to the steel pipe supporting the precast staircase. Then, the displacement sensor 2 is fixed to the second clamp 10 by the second locking screw 11. Next, the measuring head 203 of the displacement sensor 2 is adjusted to approach the precast staircase by the first locking screw 4, the ball joint assembly 6, and the third locking screw 9. Then, the lower upright 702 is grasped and the adjusting sleeve 705 is rotated. Since the inner walls of the upper and lower sides of the adjusting sleeve 705 are respectively provided with left-hand threads and... The upper and lower uprights 701 and 702 are both threadedly connected to the adjusting sleeve 705. Simultaneously, the rectangular rod 704 of the upper upright 701 is slidably inserted into the rectangular hole 703 of the lower upright 702, preventing the upper upright 701 from rotating. During rotation, the adjusting sleeve 705 can move the upper upright 701 away from the lower upright 702. At this point, the upper upright 701 causes the second clamp 10 and the measuring head 203 of the displacement sensor 2 to contact the prefabricated staircase, thereby precisely adjusting the position of the displacement sensor 2 and quickly completing the installation of the displacement sensor 2, improving installation efficiency.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A displacement sensor fixing device for in-situ static load testing of precast stairs, the device comprising a universal magnetic base (1) and a displacement sensor (2), characterized in that: The right side of the universal magnetic base (1) is fixedly connected to a first clamp (3). A first upright (5) is fixedly connected to the first clamp (3) by a first locking screw (4). A second upright (7) is provided at the top of the first upright (5) by a ball joint (6). A hinge seat (8) is fixedly connected to the top of the second upright (7). A second clamp (10) is fixedly connected to the hinge seat (8) by a third locking screw (9). The displacement sensor (2) is fixedly connected to the other end of the second clamp (10) by a second locking screw (11).

2. The precast staircase in-situ static load test displacement sensor fixing device according to claim 1, characterized in that, The spherical connecting assembly (6) includes a mounting base (601) fixedly connected to the top of the first upright (5). A spherical groove (602) is provided inside the top of the mounting base (601). A ball (603) is rotatably connected inside the spherical groove (602). The bottom end of the second upright (7) is fixedly connected to the ball (603). A locking cap (604) is threadedly connected to the top of the mounting base (601). A through hole is provided on the upper surface of the locking cap (604) and a rubber ring (605) is fixedly connected thereto.

3. The precast staircase in-situ static load test displacement sensor fixing device according to claim 2, characterized in that, The second upright (7) includes an upper upright (701) and a lower upright (702). A rectangular rod (704) is fixedly connected to the lower surface of the upper upright (701). A rectangular hole (703) is opened on the upper surface of the lower upright (702). The rectangular rod (704) is slidably inserted into the interior of the rectangular hole (703). An adjusting sleeve (705) is threadedly connected to the outer surface of the upper upright (701) and the lower upright (702) that are close to each other. The upper and lower inner walls of the adjusting sleeve (705) are respectively provided with left-hand threads and right-hand threads.

4. The precast staircase in-situ static load test displacement sensor fixing device according to claim 3, characterized in that, The first clamp (3) has a first round hole (301) and a first through slot (302) communicating with the first round hole (301) on its side. The first upright (5) is located inside the first round hole (301). The first locking screw (4) passes through the front side of the first through slot (302) and is threaded to the rear side of the first through slot (302).

5. The precast staircase in-situ static load test displacement sensor fixing device according to claim 4, characterized in that, The second clamp (10) has a U-shaped groove (1001) on one side, the hinge seat (8) is located inside the U-shaped groove (1001), and the third locking screw (9) passes through the front inner wall of the U-shaped groove (1001) and the hinge seat (8) and is threaded to the rear side of the U-shaped groove (1001).

6. The precast staircase in-situ static load test displacement sensor fixing device according to claim 5, characterized in that, The displacement sensor (2) includes a sensor body (201), a mounting post (202), and a measuring head (203). A display screen (204) is provided on the front of the sensor body (201).

7. The precast staircase in-situ static load test displacement sensor fixing device according to claim 6, characterized in that, The second clamp (10) has a second round hole (1002) and a second through slot (1003) communicating with the second round hole (1002) on its side. The mounting post (202) is located inside the second round hole (1002). The second locking screw (11) passes through the front side of the second through slot (1003) and is threaded to the rear side of the second through slot (1003).

Images