Magnetic type vertical prism device for safety monitoring

Abstract

The utility model relates to a magnetic type vertical prism device for safety monitoring, which comprises an L-shaped bracket, a fixing screw rod is in threaded connection with the outer side of a vertical column of the L-shaped bracket, the screw head end of the fixing screw rod extends to the inner side of the vertical column of the L-shaped bracket and is in threaded connection and fixation with one side of a prism, and a through hole A is formed in the center of a cross arm of the L-shaped bracket; a forced centering screw is fixedly connected in the through hole A in a penetrating mode, the lower portion of the forced centering screw is fixedly connected with one side of a connecting plate, a connecting rod is fixedly connected to the lower portion of the other side of the connecting plate, and a strong magnet is fixedly connected to the lower end of the connecting rod. The whole device is attracted to a pre-embedded iron piece beside a pre-embedded monitoring nail on a temporary safety monitoring point through the strong magnet, the tip of the lower end of the forced centering screw rod is aligned with the center of the upper surface of the pre-embedded monitoring nail, and then measurement can be conducted. When the device is put into use, the quality of safety monitoring and measuring work is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy construction safety monitoring and measurement, and in particular to a magnetic vertical prism device for safety monitoring. Background Art

[0002] During the construction of reservoirs and supporting facilities, temporary safety monitoring points or permanent safety monitoring points need to be set up in areas with large personnel flow and easy landslide deformation at the dam shoulders, high slopes and residential houses. Permanent safety monitoring points need to be monitored regularly for a long time. Most of them use prefabricated concrete observation piers at the monitoring points and then install prisms for long-term monitoring. Temporary safety monitoring points will be abolished as the construction progresses due to excavation or treatment of the landslide deformation area of ​​the temporary safety monitoring points. Therefore, most of them use prism brackets to install prisms at the temporary safety monitoring points, and regularly observe the prisms at this location through a total station to obtain the initial The initial coordinate data is compared with the coordinate data measured later to determine whether the temporary safety monitoring point has been displaced. However, temporary safety monitoring points often have frequent personnel and construction machinery movements, which will inevitably cause deformation of the fixed prism bracket and the prism installed above it, resulting in large errors in the monitoring results in the later monitoring operations, and cannot accurately reflect the actual changes in the monitoring points. In addition, the fixed prism bracket and prism set up in areas with large personnel flow are prone to loss and damage. Some temporary safety monitoring points are not conducive to the installation of prisms, so the prism may not be located at the center of the monitoring point when it is installed, which will also lead to inaccurate monitoring data. Summary of the Invention

[0003] In response to the shortcomings of the prior art, the present invention provides a magnetic vertical prism device for security monitoring, comprising an L-shaped bracket, wherein the outer side of the column of the L-shaped bracket is threadedly connected to a fixing screw, the thread head end of the fixing screw extends to the inner side of the column of the L-shaped bracket and is threadedly fixed to one side of the prism, a through hole A is opened at the center of the cross arm of the L-shaped bracket, a forced centering screw is fixedly connected through the through hole A, the bottom of the forced centering screw is fixedly connected to one side of the connecting plate, the other side of the connecting plate is fixedly connected to a connecting rod, and the lower end of the connecting rod is fixedly connected to a strong magnet.

[0004] Furthermore, the through hole A is sleeved with a forced centering screw, and the forced centering screw is located above and below the cross arm of the L-shaped bracket and is threaded with a fixing nut.

[0005] Furthermore, through holes B are provided at both ends of the connecting plate, and the through hole B at one end of the connecting plate is sleeved with the lower end of the forced centering screw, and the lower end of the forced centering screw is located below the connecting plate and is also threadedly connected with a locking nut; the through hole B at the other end of the connecting plate is sleeved with a hexagonal screw, and the lower end of the hexagonal screw is located below the connecting plate and is threadedly fixed with the thread hole provided at the upper end of the connecting rod.

[0006] Furthermore, the vertical center axis of the forced centering screw coincides with the center perpendicular line of the prism.

[0007] Furthermore, the lower end of the forced centering screw is designed to be conical, and the tip of the cone is located on the vertical center axis of the forced centering screw.

[0008] The beneficial effects of the present invention are:

[0009] The device is adsorbed as a whole on the embedded iron part next to the embedded monitoring nail at the temporary safety monitoring point by a strong magnet, and the tip of the lower end of the forced centering screw is aligned with the center of the upper surface of the embedded monitoring nail to carry out the measurement work. The present invention has a simple structure, is easy to process and manufacture, and is easy to carry. It is convenient and quick to install and disassemble, and eliminates the problem of fixed prism brackets and prisms being easily lost and damaged in areas with large personnel flow. It also solves the problem that some temporary monitoring points are not convenient for installing traditional prism brackets. The use of this device ensures the quality of safety monitoring and measurement work. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the present invention;

[0011] Figure 2 It is a left side view of the present invention;

[0012] Figure 3 A top view of the present invention;

[0013] Figure 4 Schematic diagram of the L-shaped bracket of the present invention;

[0014] Figure 5 A top view of the connecting plate of the present invention;

[0015] Figure 6 For the present invention, a state diagram is used;

[0016] In the figure: 1. L-shaped bracket; 11. Through hole A; 2. Fixing screw; 3. Prism; 4. Forced centering screw, 41. Fixing nut, 42. Locking nut; 5. Connecting plate, 51. Through hole B; 6. Connecting rod; 7. Strong magnet; 8. Hexagon socket screw; 9. Monitoring nail; 10. Embedded iron parts. DETAILED DESCRIPTION

[0017] Example 1, as shown in the figure, a magnetic vertical prism device for security monitoring includes an L-shaped bracket 1, a fixing screw 2 is threadedly connected to the outer side of the column of the L-shaped bracket 1, the thread head end of the fixing screw 2 extends to the inner side of the column of the L-shaped bracket 1 and is threadedly fixed to one side of the prism 3, a through hole A11 is opened at the center of the cross arm of the L-shaped bracket 1, a forced centering screw 4 is fixedly connected through the through hole A11, the bottom of the forced centering screw 4 is fixedly connected to one side of the connecting plate 5, the other side of the connecting plate 5 is fixedly connected to a connecting rod 6, and the lower end of the connecting rod 6 is fixedly connected to a strong magnet 7.

[0018] In this embodiment, the through hole A11 is connected to the forced centering screw 4, and the forced centering screw 4 is located above and below the cross arm of the L-shaped bracket 1 and is threaded with fixing nuts 41. The forced centering screw 4 can be fixed to the cross arm of the L-shaped bracket 1 by tightening the two fixing nuts 41.

[0019] In this embodiment, through holes B51 are provided at both ends of the connecting plate 5, and the hole center distance between the two through holes B51 ranges from 10cm to 15cm. The through hole B51 at one end of the connecting plate 5 is sleeved with the lower end of the forced centering screw 4, and the lower end of the forced centering screw 4 and located below the connecting plate 5 are also threadedly connected with a locking nut 42; the through hole B51 at the other end of the connecting plate 5 is sleeved with a hexagonal screw 8, and the lower end of the hexagonal screw 8 and located below the connecting plate 5 are threadedly fixed with the thread hole provided at the upper end of the connecting rod 6. It should be understood that the connecting plate 6 is fixed to the bottom of the connecting plate 5 by the hexagonal screw 8.

[0020] In this embodiment, the vertical center axis of the forced centering screw 4 coincides with the center perpendicular line of the prism 3; the lower end of the forced centering screw 4 is designed to be conical, and the tip of the cone is located on the vertical center axis of the forced centering screw 4; during measurement, it is ensured that the plane coordinates of the tip of the cone below the forced centering screw 4 are the same as the center coordinate values ​​of the prism 3.

[0021] The method of use of the present invention is:

[0022] like Figure 5As shown, the surveyor first uses an electric drill to drill a hole at the temporary measuring point and installs the monitoring nail 9 (a 1-2mm conical depression needs to be drilled in the center of the upper surface of the monitoring nail 9 with a drill bit, so that the conical tip of the lower end of the forced centering screw 4 can be placed in the conical depression during the later measurement to ensure accuracy when carrying out the measurement work). Then, according to the spacing of the through holes B51 set at both ends of the connecting plate 5, another hole is drilled at a distance of 10cm-15cm from the monitoring nail, and then the embedded iron piece 10 is installed. After the above work is completed, the conical tip of the lower end of the forced centering screw 4 in the assembled device can be placed in the conical depression in the center of the upper surface of the monitoring nail 9, and the lower surface of the strong magnet 7 is adsorbed on the upper end of the embedded iron piece 10, and the safety monitoring measurement work of the temporary measuring point can be carried out. After completing the measurement work of this point, the device of the present invention is removed, and then the next temporary measuring point can be carried out. After the arrangement and installation of the points, the measurement work is carried out. For repeated safety monitoring and measurement of temporary measurement points in the later stage, it is only necessary to carry the device of the present invention. After arriving at the point, the lower surface of the strong magnet 7 is adsorbed on the upper end of the embedded iron part 10, and then the conical tip of the lower end of the forced centering screw 4 is placed in the conical recess in the center of the upper surface of the monitoring nail 9, and the measurement work of the point can be carried out; the above-mentioned monitoring nail 9 and the embedded iron part 10 can be made from local materials, using steel bars cut into short connections, or using expansion screws. The monitoring nails can also be purchased as ready-made measuring nails for use. The present invention has a simple structure, is easy to process and manufacture, and is convenient and quick to install and disassemble. It eliminates the problem of fixed prism brackets and prisms being easily lost and damaged in areas with large personnel flow, and also solves the problem that some temporary monitoring points are not convenient for installing traditional prism brackets. The use of this device ensures the quality of safety monitoring and measurement work.

[0023] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A magnetic prism device for security monitoring, characterized by: The invention comprises an L-shaped bracket (1), wherein the outer side of the column of the L-shaped bracket (1) is threadedly connected with a fixing screw (2), the thread head end of the fixing screw (2) extends to the inner side of the column of the L-shaped bracket (1) and is threadedly fixed to one side of the prism (3), a through hole A (11) is opened at the center of the cross arm of the L-shaped bracket (1), a forced centering screw (4) is fixedly connected through the through hole A (11), the lower side of the forced centering screw (4) is fixedly connected to one side of the connecting plate (5), the lower side of the other side of the connecting plate (5) is fixedly connected with a connecting rod (6), and the lower end of the connecting rod (6) is fixedly connected to a strong magnet (7).

2. The magnetic prism device for security monitoring according to claim 1, characterized in that: The through hole A (11) is sleeved with a forced centering screw (4), and the forced centering screw (4) is located above and below the horizontal arm of the L-shaped bracket (1) and is threaded with a fixing nut (41).

3. The magnetic prism device for security monitoring according to claim 1, characterized in that: Through holes B (51) are provided at both ends of the connecting plate (5), and the through hole B (51) at one end of the connecting plate (5) is sleeved with the lower end of the forced centering screw (4), and the lower end of the forced centering screw (4) and located below the connecting plate (5) is also threadedly connected with a locking nut (42); the through hole B (51) at the other end of the connecting plate (5) is sleeved with a hexagonal screw (8), and the lower end of the hexagonal screw (8) and located below the connecting plate (5) is threadedly fixed with a threaded hole provided at the upper end of the connecting rod (6).

4. The magnetic prism device for security monitoring according to claim 1, characterized in that: The vertical center axis of the forced centering screw (4) coincides with the center perpendicular line of the prism (3).

5. The magnetic prism device for security monitoring according to claim 4, characterized in that: The lower end of the forced centering screw (4) is designed to be conical, and the tip of the cone is located on the vertical center axis of the forced centering screw (4).

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