Observation prism centering support

Abstract

The utility model relates to an observation prism centering support which comprises a measuring scale, magnetic attraction bases and a prism, the prism is arranged in the middle of the upper face of the measuring scale, and the magnetic attraction bases are symmetrically arranged on the measuring scale on the two sides of the prism. A sliding groove capable of being matched with the measuring scale is formed in the magnetic attraction base, and positioning blocks are arranged in the middle of the lower face of the magnetic attraction base. Clamping strips are arranged on the two sides of the measuring scale respectively, and positioning pieces capable of being matched with the clamping strips are arranged on the magnetic attraction base; the measuring scale takes the central position as a zero point, and scale marks are symmetrically arranged on the two sides of the zero point. According to the utility model, the fit tolerance between the measuring scale and the magnetic base is small, the use precision is high, and the measurement result is accurate; the magnetic attraction base can be attracted to a workpiece to be measured and cannot move, so that errors are avoided while operation is facilitated, and the magnetic attraction base can be suitable for observation center point positioning of round pipes with different section sizes; the utility model has the advantages of simple structure, no need of manufacturing a large number of sample plates, cost saving and high working efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring instruments and relates to an observation prism centering bracket. Background Art

[0002] Surveying in the construction industry is typically accomplished using a total station, which is paired with a prism. The observation point of the prism must be accurately located during use. However, in some cases, the observation point is theoretical and does not exist in the actual structure. For example, for an anchor beam (hollow tube structure), the observation point is the center of the anchor tube end. Traditionally, the center of the anchor tube end was determined by creating a circular steel template 0.5-1mm smaller than the anchor tube's inner diameter or by converting it from a quadrant point on the anchor tube wall. While the circular template method provides guaranteed accuracy, due to the varying diameters of each anchor tube, multiple templates must be prepared and categorized, which is cumbersome. Furthermore, the conversion method using a quadrant point on the anchor tube wall can easily affect measurement accuracy due to factors such as the deviation of the circular tube profile and the selection of the measurement point. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art, solve the problem of difficulty in finding observation points of some pipe structures, and provide an observation prism centering bracket.

[0004] In order to achieve the above objectives, the following technical solutions are adopted:

[0005] The observation prism centering bracket includes a ruler, a magnetic base and a prism. The prism is arranged in the middle of the upper part of the ruler, and the magnetic bases are symmetrically arranged on the ruler on both sides of the prism; the magnetic bases are provided with sliding grooves that can cooperate with the ruler, and the lower middle parts of the magnetic bases are respectively provided with positioning blocks; the two sides of the ruler are respectively provided with clamping strips, and the magnetic bases are provided with positioning pieces that can cooperate with the clamping strips; the ruler takes the center position as the zero point, and scale lines are symmetrically arranged on both sides of the zero point.

[0006] Preferably, handles are provided at both ends of the ruler.

[0007] Preferably, a connecting hole is provided in the middle of the ruler, and the lower end of the prism bracket is screwed into the connecting hole.

[0008] Preferably, the ruler is made of non-magnetic material.

[0009] Preferably, the cross section of the positioning block is trapezoidal.

[0010] Preferably, the matching tolerance between the ruler and the slide groove is 0.2-0.5 mm.

[0011] Preferably, mounting holes are respectively provided at both ends of the ruler, and the lower end of the handle is screwed into the mounting holes.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The matching tolerance between the ruler and the magnetic base of the utility model is small, the use precision is high, and the measurement result is accurate; the magnetic base can be adsorbed on the workpiece to be measured and will not move, which is convenient for operation and avoids errors, and can be used for observing the center point positioning of circular tubes with different cross-sectional sizes; the utility model has a simple structure, does not require a large number of templates, saves costs, and has high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 This is a schematic diagram of the main view of the measuring ruler of the present invention.

[0016] Figure 3 This is a schematic diagram of the magnetic base structure of the present invention.

[0017] In the figure: 1. Ruler; 2. Magnetic base; 3. Prism; 4. Slide; 5. Positioning block; 6. Card strip; 7. Positioning piece; 8. Scale line; 9. Handle; 10. Connection hole; 11. Mounting hole. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0019] like Figure 1-Figure 3 As shown, an observation prism centering bracket includes a ruler 1, a magnetic base 2 and a prism 3. The prism 3 is provided in the middle of the upper portion of the ruler 1. The reflection point of the prism 3 and the center point of the ruler 1 are located in the same vertical plane. The prism 3 is used for measurement in conjunction with a total station.

[0020] Magnetic bases 2 are symmetrically provided on the ruler 1 on both sides of the prism 3. The magnetic bases 2 can be placed on the ports of the pipe structure to be measured to support the ruler 1.

[0021] The magnetic base 2 is provided with a slide groove 4 that can cooperate with the ruler 1, and the ruler 1 can slide in the slide groove 4;

[0022] A positioning block 5 is provided at the middle of the lower side of the magnetic base 2. The positioning block 5 can be inserted into the interior of the tube structure. The two sides of the positioning block 5 are in contact with the inner wall of the tube structure to ensure that the ruler 1 is in the central axis of the tube structure 1.

[0023] The ruler 1 is provided with a clamping strip 6 on both sides, and the magnetic base 2 is provided with a positioning member 7 that can cooperate with the clamping strip 6. The positioning member 7 is a set screw. When the positioning member 7 cooperates with the clamping strip 6, the ruler 1 is locked and cannot move;

[0024] The ruler 1 takes the center position as the zero point, and scale lines 8 are symmetrically set on both sides of the zero point; when the two side lines of the two positioning blocks 5 are tightly pressed against the inner wall of the tube structure, the ruler 1 is slid and adjusted so that the scale lines on the ruler 1 are aligned with the center of the base, and the prism 3 on the ruler is located in the center of the circular tube.

[0025] Furthermore, handles 9 are provided at both ends of the ruler 1 , and the handles 9 facilitate the staff to slide and adjust the ruler 1 .

[0026] Furthermore, a connecting hole 10 is opened in the middle of the ruler 1, and the lower end of the bracket of the prism 3 is screwed into the connecting hole 10. The screw connection method facilitates the replacement of the prism 3.

[0027] Furthermore, the ruler 1 is made of non-magnetic material. Since the magnetic base 2 has magnetic force, the ruler 1 needs to be made of non-magnetic material to ensure that the ruler 1 can slide smoothly in the magnetic base 2.

[0028] Furthermore, the cross section of the positioning block 5 is trapezoidal, and the trapezoidal positioning block 5 facilitates determining the orientation of the magnetic base 2 during assembly.

[0029] Furthermore, the matching tolerance between the ruler 1 and the slide groove 4 is 0.2-0.5 mm, and the smaller tolerance ensures the accuracy of the measurement result.

[0030] Furthermore, mounting holes 11 are respectively provided at both ends of the ruler 1 , and the lower end of the handle 9 is screwed into the mounting holes 11 .

[0031] Working principle: When the utility model is in use, the two magnetic bases are placed on the ports of the tube structure, and the two positioning blocks 5 are inserted into the inside of the tube structure to ensure that the outer side lines of the two positioning blocks 5 are pressed against the inner wall of the tube structure. At this time, the ruler 1 is located on the center line of the tube mouth circle; then, the ruler 1 is slid and adjusted so that the scale line on the ruler 1 is aligned with the center of the base, and the prism 3 on the ruler is located in the center of the circular tube.

[0032] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An observation prism centering bracket, comprising a ruler (1), a magnetic base (2) and a prism (3), characterized in that: A prism (3) is provided in the middle of the upper portion of the ruler (1), and magnetic bases (2) are symmetrically provided on the ruler (1) on both sides of the prism (3); a slide groove (4) capable of cooperating with the ruler (1) is provided on the magnetic base (2), and a positioning block (5) is provided in the middle of the lower portion of the magnetic base (2); a clamping strip (6) is provided on both sides of the ruler (1), and a positioning member (7) capable of cooperating with the clamping strip (6) is provided on the magnetic base (2); the ruler (1) takes the center position as the zero point, and scale lines (8) are symmetrically provided on both sides of the zero point.

2. The observation prism centering bracket according to claim 1, characterized in that: Handles (9) are respectively provided at both ends of the measuring ruler (1).

3. The observation prism centering bracket according to claim 1, characterized in that: A connecting hole (10) is provided in the middle of the ruler (1), and the lower end of the bracket of the prism (3) is screwed into the connecting hole (10).

4. The observation prism centering bracket according to claim 1, characterized in that: The measuring ruler (1) is made of non-magnetic material.

5. The observation prism centering bracket according to claim 1, characterized in that: The cross section of the positioning block (5) is trapezoidal.

6. The observation prism centering bracket according to claim 1, characterized in that: The matching tolerance between the ruler (1) and the slide groove (4) is 0.2-0.5 mm.

7. The observation prism centering bracket according to claim 2, characterized in that: Mounting holes (11) are respectively provided at both ends of the ruler (1), and the lower end of the handle (9) is screwed into the mounting hole (11).

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