Waterproof prism device suitable for tunnel measurement

Abstract

The utility model relates to a waterproof prism device suitable for tunnel measurement, 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 with one side of a prism, and a screw hole A used for being connected with a waterproof device is formed in the center of the top of the prism. A through hole is formed in the center of a cross arm of the L-shaped bracket; the device is simple in structure, easy to manufacture and convenient to install, the waterproof device can reduce the influence of water dripping in a cavern on the prism, the precision and the service life of the prism are maintained, the measurement precision is improved, and the device can be installed at the tail of a shield tunneling machine through the U-shaped clamp by using the L-shaped support. Or the device is directly mounted on a forced centering disc of a fixed rear view point through an L-shaped bracket, so that the application range is further expanded, and the quality of tunnel monitoring and measuring work is ensured by putting the device into use.

Description

Technical Field

[0001] The invention relates to the technical field of shield tunnel measurement, in particular to a waterproof prism device suitable for tunnel measurement. Background Art

[0002] The total station uses laser as the light source. The laser generates a beam of laser with a specific wavelength. After the laser beam is collimated by a prism, it is emitted to the target object at a specific divergence angle. When the laser beam hits the target object, part of the light will be reflected back. The distance is calculated by the reflection of the light, and the coordinate value is calculated using the angle and distance. Therefore, the prism must be used in conjunction with the total station in surveying and mapping operations. Among the many factors that affect the accuracy of the total station operation, the accuracy of the prism is one of the most important factors. It is mainly used for correction and measurement. In addition, the number of prisms used in the calibration measurement and monitoring of tunnel shield machines is large and the time is long. During the entire tunnel shield machine construction process, the prism is installed in a fixed position of the shield machine for a long time and used for a long time. It is easy to be affected by dripping water with a high calcium content in the cavern, which can easily cause physical erosion of the prism. This erosion will reduce the reflectivity and smoothness of the prism, affecting its optical performance and the service life of the prism; when the prism is eroded by water for a long time, its surface material will undergo chemical reactions, resulting in color changes, affecting the use effect and accuracy of the prism; in order to reduce the impact of water erosion on the prism, the prism needs to be modified to extend the accuracy and service life of the prism, so it is necessary to install waterproof and anti-refractive devices on the prism. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a waterproof prism device suitable for tunnel measurement, characterized in that it includes an L-shaped bracket, a fixing screw is threadedly connected to the outer side of the column of the L-shaped bracket, the thread head end of the fixing screw extends to the inner side of the column of the L-shaped bracket and is threadedly connected to one side of the prism, a thread hole A for connecting to a waterproof device is opened at the center of the top of the prism, and a through hole is opened at the center of the cross arm of the L-shaped bracket.

[0004] Preferably, the through hole is sleeved with a connecting screw, a fixing nut is threadedly connected to the lower end of the connecting screw and is located below the cross arm of the L-shaped bracket, and the lower end of the connecting screw is threadedly connected to a fixing device.

[0005] Preferably, the waterproof device comprises an umbrella handle and an umbrella cover mounted on the upper end of the umbrella handle, and a screw head for threaded connection with the thread hole A is provided at the lower end of the umbrella handle.

[0006] Furthermore, the umbrella surface includes umbrella ribs, and the umbrella ribs are fixedly covered with rainproof cloth.

[0007] Preferably, the fixing device comprises a U-shaped card, both sides of the U-shaped card are provided with thread holes C for threading with the positioning screw, and the center of the upper surface of the U-shaped card is provided with a thread hole B for threading with the lower end of the connecting screw.

[0008] Furthermore, the center of the wire hole B and the center of the prism are on the same vertical line.

[0009] The beneficial effects of the present invention are:

[0010] The device has a simple structure, is easy to make and install, and the waterproof device can reduce the impact of dripping water in the cave on the prism, maintain the accuracy and service life of the prism, and improve the accuracy of measurement. The L-shaped bracket can be used to install the device on the tail of the shield machine through a U-shaped card, or directly install the device on the forced centering plate of the fixed rear view point through the L-shaped bracket, further expanding the scope of use. The use of this device ensures the quality of tunnel monitoring and measurement work. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an overall schematic diagram of the present invention;

[0012] Figure 2 A three-dimensional schematic diagram of an L-shaped bracket of the present invention for mounting a prism;

[0013] Figure 3 It is a schematic diagram of the waterproof device of the present invention;

[0014] Figure 4 It is a three-dimensional schematic diagram of the U-shaped card of the present invention;

[0015] In the figure: 1, L-shaped bracket; 11, through hole; 2, fixing screw; 3, prism, 31, thread hole A; 4, waterproof device, 41, umbrella handle, 42, umbrella cover, 421, umbrella rib, 422, rainproof cloth, 43, screw head; 5, connecting screw, 51, fixing nut, 52, locking nut; 6, fixing device; 61, U-shaped card, 611, thread hole B, 612, thread hole C, 62, positioning screw. DETAILED DESCRIPTION

[0016] Embodiment 1, as Figure 1-4 As shown, a waterproof prism device suitable for tunnel measurement comprises an L-shaped bracket, wherein a fixing screw 2 is threadedly connected to the outer side of a column of the L-shaped bracket 1, and a 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 connected to one side of a prism 3, a thread hole A (31) for connecting with a waterproof device 4 is provided at the center of the top of the prism 3, and a through hole 11 is provided at the center of a cross arm of the L-shaped bracket 1.

[0017] In this embodiment, the through hole 11 is sleeved with the connecting screw 5, and a fixing nut 51 is threadedly connected to the lower end of the connecting screw 5 and located below the cross arm of the L-shaped bracket 1. The lower end of the connecting screw 5 is threadedly connected to the fixing device 6, and the L-shaped bracket 1 and the prism connected to the L-shaped bracket 1 can be fixed to the rear steel frame of the shield machine through the fixing device 6.

[0018] In this embodiment, the waterproof device 4 includes an umbrella handle 41 and an umbrella cover 42 installed on the upper end of the umbrella handle 41. The lower end of the umbrella handle 41 is provided with a screw head 43 for threading with the thread hole A31.

[0019] In this embodiment, the umbrella cover 42 includes umbrella ribs 421, and the umbrella ribs 421 are fixedly covered with rainproof cloth 422, so that the umbrella cover 42 plays a good role in waterproofing the prism.

[0020] In this embodiment, the fixing device 6 includes a U-shaped card 61, and both sides of the U-shaped card 61 are provided with a thread hole C612 for threading with the positioning screw 62. When the U-shaped card 61 is inserted into the tail steel beam of the shield machine, one of the two thread holes C612 can be arbitrarily selected to conveniently rotate the positioning screw 62 and screw it into the positioning screw 62, so that the staff can fix the U-shaped card 61 conveniently. The center of the upper surface of the U-shaped card 61 is provided with a thread hole B611 threaded with the lower end of the connecting screw 5. The process is that the through hole 11 is sleeved with the connecting screw 5, and the lower end of the connecting screw 5 and located below the cross arm of the L-shaped bracket 1 is threaded with a fixing screw. The nut 51 is then inserted into a locking nut 52, and then the connecting screw 5 is threadedly connected to the thread hole B611, and the end of the connecting screw 5 is screwed into another locking nut 52. The function is to tighten the two locking nuts 52 so that when the shield machine is working, the connection between the connecting screw 5 and the thread hole B611 will not be loosened or fall off due to its vibration. The function of the fixing nut 51 is that when measuring later, the U-shaped card 61 needs to be rotated to adjust the direction of the prism fixed on the U-shaped card 61. When the direction of the prism is determined, tighten the fixing nut 51 to fix the direction of the prism.

[0021] In this embodiment, the center of the thread hole B (611) and the center of the prism (3) are on the same vertical line, and when the direction of the prism fixed on the U-shaped card 61 is adjusted by rotating the U-shaped card 61, the horizontal coordinate of the prism will not change.

[0022] Embodiment 2: The difference between this embodiment and embodiment 1 is that there is no need to use the connecting screw (5) and the fixing device 6, and the through hole 11 on the L-shaped bracket (1) is directly used to install it on the centering screw on the forced centering plate of the tunnel rear sight point for measuring the rear sight point.

[0023] The method of use of the present invention is:

[0024] 1. The method of using the device installed on the shield machine is to install the prism 3 at the end of the fixing screw 2 of the L-shaped bracket, and install the waterproof device 4 above the prism 3. After the connecting screw 5 is inserted from the top through the through hole 11 on the cross arm of the L-shaped bracket 1, the fixing nut 51 and the locking nut 52 are screwed in sequence, and then the connecting screw 5 is threadedly connected with the thread hole B611 on the U-shaped card 61, and the end of the connecting screw 5 located below the thread hole B611 is screwed into another locking nut 52, and the two locking nuts 52 are tightened in sequence to fix the connecting screw 5 firmly on the U-shaped card 61, and then the U-shaped card 61 is clamped on the steel beam at the measuring point of the central axis of the tail of the shield machine, and the positioning screw 62 is screwed into the U-shaped card 61 at any position. The thread hole C612 on one side is used to fix the prism (the same principle as the fixing principle of the connecting screw 5 and the U-shaped card 61. When the positioning screw 62 is screwed into the thread hole C612 on any side of the U-shaped card 61, a nut can also be inserted into the positioning screw 62 inside and outside one side of the U-shaped card 61. When the positioning screw 62 tightly fixes the U-shaped card 61 on the steel beam at the tail of the shield machine, tighten the two nuts to prevent the positioning screw 62 from loosening due to the vibration of the shield machine). Finally, through the total station observation, rotate the U-shaped card 61 in the horizontal direction to adjust the horizontal direction of the prism, and the vertical direction of the prism can be adjusted by directly twisting the prism. After the prism direction adjustment is completed, the subsequent measurement work can be carried out.

[0025] 2. The method of using the device installed on the forced centering disk of the rear sight point is as follows: at the rear sight point where water dripping occurs, install the prism 3 at the end of the fixing screw 2 of the L-shaped bracket, and install the waterproof device 4 on the prism 3. The through hole 11 on the cross arm of the L-shaped bracket 1 is sleeved with the centering screw at the center point of the forced centering disk. Through the total station observation, the U-shaped card 61 is rotated in the horizontal direction to adjust the horizontal direction of the prism, and the nut is screwed into the centering screw to fix it. Then the vertical direction of the prism is adjusted in the same way as when it is installed on the shield machine. After the prism direction adjustment is completed, the measurement of the rear sight point can be carried out.

[0026] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the invention. 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 waterproof prism device suitable for tunnel measurement, characterized in that: The invention comprises an L-shaped bracket (1), wherein a fixing screw (2) is threadedly connected to the outside of a column of the L-shaped bracket (1), a thread head end of the fixing screw (2) extends to the inside of the column of the L-shaped bracket (1) and is threadedly connected to one side of a prism (3), a thread hole A (31) for connecting to a waterproof device (4) is provided at the center of the top of the prism (3), and a through hole (11) is provided at the center of a cross arm of the L-shaped bracket (1).

2. A waterproof prism device suitable for tunnel measurement according to claim 1, characterized in that: The through hole (11) is sleeved with the connecting screw (5), a fixing nut (51) is threadedly connected at the lower end of the connecting screw (5) and located below the cross arm of the L-shaped bracket (1), and the lower end of the connecting screw (5) is threadedly connected to the fixing device (6).

3. A waterproof prism device suitable for tunnel measurement according to claim 1, characterized in that: The waterproof device (4) comprises an umbrella handle (41) and an umbrella cover (42) mounted on the upper end of the umbrella handle (41); a screw head (43) for threading with the thread hole A (31) is provided at the lower end of the umbrella handle (41).

4. A waterproof prism device suitable for tunnel measurement according to claim 3, characterized in that: The umbrella surface (42) comprises umbrella ribs (421), and the umbrella ribs (421) are fixedly covered with rainproof cloth (422).

5. The waterproof prism device suitable for tunnel measurement according to claim 2, characterized in that: The fixing device (6) comprises a U-shaped card (61), both sides of which are provided with thread holes C (612) for threading with the positioning screw rod (62), and the center of the upper surface of the U-shaped card (61) is provided with a thread hole B (611) for threading with the lower end of the connecting screw rod (5).

6. A waterproof prism device suitable for tunnel measurement according to claim 5, characterized in that: The center of the wire hole B (611) and the center of the prism (3) are on the same vertical line.

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