Adjustable reference cable strand measuring prism device

Abstract

The utility model discloses an adjustable reference cable strand measuring prism device which comprises a universal prism, a prism rod, an adjusting screw, a left clamp, a right clamp, a fastening screw, a fastening connecting piece and an adjusting block. The left clamp and the right clamp which are in bilateral symmetry fix two adjacent fastening connecting pieces together through fastening screws to jointly form a regular hexagon clamp; prism bars with the same length are installed in the middle of the left side clamp and the right side clamp, and universal prisms are installed on the prism bars. The adjusting screws are screwed into the clamp screw holes in the edges of the left side clamp and the right side clamp from outside to inside and then screwed into the adjusting block screw holes of the trapezoidal blocks of the adjusting blocks. According to the utility model, the adjusting screw is adjusted to adapt to the size of the reference cable strand within the range of 30-40mm, so that the problem that the reference cable strand measuring prism cannot be reused is solved. And meanwhile, the prism adopts a universal prism, so that the problem that the reference cable strand cannot be observed synchronously in opposite directions during measurement is solved.

Description

Technical Field

[0001] The utility model relates to a prism for measuring a reference cable strand of a suspension bridge, in particular to an adjustable prism device for measuring a reference cable strand. Background Art

[0002] The main cable, the lifeline of a suspension bridge, relies heavily on the accuracy of the installation of the reference strands. During installation, a measuring prism matching the strand's dimensions must be fabricated. Investigations revealed that the strands of the Yanji Yangtze River Bridge measure 36.833mm, those of the Hongzhou Bridge measure 35.750mm, those of the Xihoumen Highway-Railway Bridge measure 38.025mm, and those of the Dadu River Bridge measure 31.250mm. While the strands' dimensions all fall within the 30-40mm range, measuring prisms for the reference strands cannot be reused or interchanged. Summary of the Invention

[0003] The purpose of the utility model is to provide an adjustable reference cable strand measuring prism device, which can effectively solve the problem that the reference cable strand measuring prism cannot be reused.

[0004] The purpose of this utility model is achieved in this way:

[0005] An adjustable reference cable measuring prism device is characterized by comprising a universal prism, a prism rod, an adjustment screw, a left clamp, a right clamp, a fastening screw, a fastening connector and an adjustment block; the left clamp and the right clamp are bilaterally symmetrical and each is half of a regular hexagonal clamp, each end of the left clamp and each end of the right clamp are provided with a fastening connector extending radially, the left clamp and the right clamp are connected by a fastening screw, the two adjacent fastening connectors are fixed together, and the left clamp and the right clamp together form a regular hexagonal clamp; a prism rod of the same length is installed in the middle of the outer side of the left clamp and the middle of the outer side of the right clamp, and each prism rod is provided with a fastening connector extending radially. A universal prism is installed on the top; two centrally symmetrical fixture screw holes that pass through the top and bottom edges are provided on each side of the left fixture and the right fixture; a regular hexagonal adjustment block that can stick to the inner wall of the regular hexagonal fixture is placed in the regular hexagonal fixture; the adjustment block is composed of six separate trapezoidal blocks; each trapezoidal block is provided with two adjustment block screw holes that correspond to the positions of the fixture screw holes on the regular hexagonal fixture and are open outward; the adjustment screw is a screw with smooth ends, an external thread on one side in the middle, and a scale on the other side in the middle; the inward end of the adjustment screw is screwed into the fixture screw hole on each side of the left fixture and the right fixture from the outside to the inside, and then screwed into the adjustment block screw hole of the trapezoidal block of the adjustment block.

[0006] The trapezoidal block of the adjustment block is an isosceles trapezoid with a top length of 30 mm, a bottom length of 40 mm, and a waist length of 10 mm.

[0007] The left and right clamps are both half of a regular hexagonal clamp with an outer dimension of 70 mm and an inner dimension of 50 mm.

[0008] When all 12 adjustment screws are at 0, the measuring prism is suitable for a reference cable strand size of 30 mm. When all 12 adjustment screws are turned out to 8.66 mm, the measuring prism is suitable for a reference cable strand size of 40 mm. The adjustment screw adjustment range is 0 to 8.66 mm, and the corresponding measuring prism is suitable for a reference cable strand size of 30 to 40 mm.

[0009] The utility model includes a universal prism, a prism rod, an adjustment screw, a left clamp, a right clamp, a fastening screw, a fastening connector, and an adjustment block. By adjusting the adjustment screw to accommodate reference strand sizes within a range of 30 to 40 mm, the utility model solves the problem of the non-reusability of the reference strand measurement prism. Furthermore, the use of a universal prism solves the problem of simultaneous observation during reference strand measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of an adjustable reference cable strand measurement prism device (size 30 mm);

[0011] Figure 2 for Figure 1 A top view of

[0012] Figure 3 It is a structural diagram of the adjustment block;

[0013] Figure 4 It is a structural diagram of the adjusting screw;

[0014] Figure 5 Schematic diagram of an adjustable reference cable strand measurement prism device (size 40 mm);

[0015] Figure 6 for Figure 5 Top view of . DETAILED DESCRIPTION

[0016] The present utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0017] Example 1:

[0018] Figure 1 The following is a schematic diagram of an adjustable reference cable measurement prism device (size 30mm). Figure 1As shown, an adjustable reference cable measuring prism includes a universal prism 1, a prism rod 2, an adjustment screw 3, a left clamp 4, a right clamp 5, a fastening screw 6, a fastening connector 7 and an adjustment block 8; the left clamp 4 and the right clamp 5 are symmetrical and each is half of a regular hexagonal clamp 9, and each end of the left clamp 4 and the right clamp 5 is provided with a fastening connector 7 extending radially. The left clamp 4 and the right clamp 5 are connected by a fastening screw 6, and the two adjacent fastening connectors 7 are fixed together. The left clamp 4 and the right clamp 5 together form a regular hexagonal clamp 9; a prism rod 2 of the same length is installed in the middle of the outer side of the left clamp 4 and the middle of the outer side of the right clamp 5, and a fastening connector 7 is installed at the top of each prism rod 2. There is a universal prism 1; two centrally symmetrical fixture screw holes 10 are provided on each side of the left clamp 4 and the right clamp 5, which pass through the top and bottom sides; a regular hexagonal adjustment block 8 that can stick to the inner wall of the regular hexagonal clamp 9 is placed in the regular hexagonal clamp 9; the adjustment block 8 is composed of six separate trapezoidal blocks 11; each trapezoidal block 11 is provided with two adjustment block screw holes 14 that correspond to the positions of the fixture screw holes 10 on the regular hexagonal clamp 9 and are open outward; the adjustment screw 3 is a screw with smooth ends, an external thread 12 on one side in the middle, and a scale 13 on the other side in the middle; the inward end of the adjustment screw 3 is screwed from the outside to the inside into the fixture screw hole 10 on each side of the left clamp 4 and the right clamp 5, and then screwed into the adjustment block screw hole 14 of the trapezoidal block 11 of the adjustment block 8.

[0019] The adjustment range of the adjustment screw 3 is 0 to 8.66 mm, corresponding to an applicable reference cable strand size of 30 to 40 mm.

[0020] The trapezoidal block 11 of the adjustment block 8 is an isosceles trapezoid with a top length of 30 mm, a bottom length of 40 mm, and a waist length of 10 mm. When the scales of the twelve adjustment screws 3 are all at 0 scale, it is suitable for a reference cable strand size of 30 mm.

[0021] Figure 4 It is a schematic diagram of the structure of the adjustment screw. Figure 4 As shown, the adjustment screw 3 contains a scale, and below the scale line is an external thread, which is used to connect the clamp screw hole 10 on the left clamp 4 and the right clamp 5 to form an adjustable structure. Since the inward end of the screw 3 is threadedly connected to the adjustment block 8, the position of the adjustment block 8 can be adjusted by rotating the adjustment screw 3.

[0022] The left clamp 4 and the right clamp 5 are both half of the regular hexagonal clamp 9 with an outer dimension of 70 mm and an inner dimension of 50 mm.

[0023] Working principle:

[0024] During use, first calculate the unscrewing value of the adjustment screw 3 according to the size of the reference cable strand of the suspension bridge in the project, and turn the twelve adjustment screws 3 to uniformly adjust them to the calculated unscrewing value; then completely unscrew the fastening screw 6, install the left clamp 4 and the right clamp 5 at the position to be measured of the reference cable strand, and fix the two adjacent fastening connectors 7 together by the fastening screw 6, so that the left clamp 4 and the right clamp 5 together form a regular hexagonal clamp 9, and then firmly fix the regular hexagonal clamp 9 to the position to be measured of the reference cable strand; install the universal prism 1, set up total stations on both sides respectively, and observe the elevations of the two universal prisms 1 of the reference cable strand measurement prism at the same time. The average value of the elevations of the two universal prisms 1 is the center elevation of the reference cable strand, and the average value of the center elevations of the reference cable strand observed by the two total stations at the same time is the center elevation of the reference cable strand at that moment; after the observation is completed, finally completely unscrew the fastening screw 6, disassemble the two universal prisms 1, and complete the measurement work.

[0025] Example 2:

[0026] The structure of Example 2 is the same as that of Example 1, except that:

[0027] Figure 5 Schematic diagram of an adjustable reference cable measurement prism device (size 40mm).

[0028] The trapezoidal block 11 of the adjustment block 8 is an isosceles trapezoid with a top length of 30 mm, a bottom length of 40 mm, and a waist length of 10 mm. When all the scales of the twelve adjustment screws 3 are 8.66 mm, it is suitable for a reference cable strand size of 40 mm.

[0029] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. An adjustable reference cable measurement prism device, characterized by: The utility model comprises a universal prism, a prism rod, an adjustment screw, a left clamp, a right clamp, a fastening screw, a fastening connector and an adjustment block; the left clamp and the right clamp are symmetrical and each is half of a regular hexagonal clamp, and each end of the left clamp and the right clamp are provided with a fastening connector extending radially, and the left clamp and the right clamp are connected by a fastening screw to fix the two adjacent fastening connectors together, and the left clamp and the right clamp together constitute a regular hexagonal clamp; a prism rod of the same length is installed in the middle of the outer side of the left clamp and the middle of the outer side of the right clamp, and a universal prism is installed at the top of each prism rod. ; Two centrally symmetrical fixture screw holes that pass through the top and bottom edges are provided on each side of the left fixture and the right fixture. A regular hexagonal adjustment block that can stick to the inner wall of the regular hexagonal fixture is placed in the regular hexagonal fixture. The adjustment block is composed of six separate trapezoidal blocks. Each trapezoidal block is provided with two adjustment block screw holes that correspond to the positions of the fixture screw holes on the regular hexagonal fixture and are open outward. The adjustment screw is a screw with smooth ends, an external thread on one side in the middle, and a scale on the other side in the middle. The inward end of the adjustment screw is screwed into the fixture screw hole on each side of the left fixture and the right fixture from the outside to the inside, and then screwed into the adjustment block screw hole of the trapezoidal block of the adjustment block.

2. The adjustable reference cable measurement prism device according to claim 1, characterized in that: The trapezoidal block of the adjustment block is an isosceles trapezoid with a top length of 30 mm, a bottom length of 40 mm, and a waist length of 10 mm.

3. The adjustable reference cable measurement prism device according to claim 1, characterized in that: The left and right clamps are both half of a regular hexagonal clamp with an outer dimension of 70 mm and an inner dimension of 50 mm.

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