Prefabricated box girder internal mold construction measuring device

Abstract

The invention relates to the technical field of prefabricated box girder assembly, in particular to a prefabricated box girder inner mold construction measuring device which comprises an outer mold, an inner mold is placed in the outer mold, and a distance sensor used for measuring and calibrating the position of the inner mold in the outer mold is arranged on the front side of the outer mold. An adjusting mechanism used for adjusting the level of the distance sensor is arranged on the front side of the outer mold, a detection mechanism used for adjusting the left-right direction position and the inclination angle of the distance sensor is arranged on the adjusting mechanism, and the detection mechanism comprises an adjusting piece arranged on the adjusting mechanism in a left-right sliding mode. An electric telescopic rod is fixedly mounted on the rear side of the adjusting part through a mounting sleeve, the rear side of the mounting sleeve is fixedly connected with a distance sensor, the distance sensor is arranged, the position of the inner mold in the outer mold can be horizontally and centrally measured after the inner mold is placed, and different measurement steps can be completed through one device; and the measuring step of the inner film in the mounting process is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of precast box girder assembly, and specifically to a construction measurement device for the internal mold of precast box girders. Background Technique

[0002] Precast box girders are commonly used components in bridge construction in civil engineering and belong to a type of precast concrete structure. When precast box girders are precast and formed, first, the outer mold needs to be assembled. Then, after placing the steel bar framework inside the outer mold, the inner mold is hoisted to the inside of the outer mold, and the steel bar framework is located between the inner mold and the outer mold. Then, concrete is poured between the inner mold and the outer mold to prepare the precast box girder.

[0003] When installing the inner mold, it is necessary to measure the placement position of the inner mold. When measuring and detecting different states of the inner mold, corresponding equipment needs to be used for measurement. For example, when detecting the horizontal state of the inner mold, an electronic level is required, and when detecting the centered position of the inner mold, a total station is required for detection.

[0004] When measuring the state of the inner mold through the existing method, multiple measuring devices need to be used, resulting in a complicated process during the entire measurement and affecting the measurement efficiency. When moving the position during measurement with each device, it is first necessary to calibrate the benchmark of the device itself, and the calibration methods of different devices are different, which affects the measurement efficiency when measuring different positions. Summary of the Invention

[0005] Therefore, the present invention provides a construction measurement device for the internal mold of precast box girders, which solves the above technical problems.

[0006] A construction measurement device for the internal mold of precast box girders provided by the present invention includes an outer mold. An inner mold is placed inside the outer mold. A distance sensor for measuring and calibrating the position of the inner mold inside the outer mold is provided in front of the outer mold. An adjusting mechanism for adjusting the level of the distance sensor is provided in front of the outer mold. The adjusting mechanism is provided with a distance sensor for adjusting the left - right position and inclination angle of the distance sensor.

[0007] The detection mechanism includes an adjusting member slidably arranged left - and - right on the adjusting mechanism. The rear side of the adjusting member is fixedly installed with an electric telescopic rod through an installation sleeve. The rear side of the installation sleeve is fixedly connected to the distance sensor. A detection member for calibrating the position of the distance sensor is provided at the rear side of the distance sensor. The telescopic end of the electric telescopic rod is provided with an auxiliary member for assisting the distance sensor to measure the clearance distance.

[0008] According to an embodiment of the present invention, a horizontal bubble tube is embedded on the upper surface of the horizontal section at the lower side of the rectangular frame, and the distance sensor is electrically connected to an external display device.

[0009] According to an embodiment of the present invention, the leveling member includes an adjustment slider slidably connected up and down on the vertical section of the rectangular frame. A support foot is fixedly connected to the lower surface of the adjustment slider. A positioning sleeve is fixedly connected above the adjustment slider on the vertical section of the rectangular frame. An adjustment screw is threadedly connected to the positioning sleeve, and the bottom end of the adjustment screw is rotatably connected to the upper surface of the adjustment slider through a bearing.

[0010] According to an embodiment of the present invention, the adjustment member includes an electric slide seat slidably connected in the horizontal section of the rectangular frame in the left - right direction. A sliding track is fixedly connected between the opposite surfaces of the two electric slide seats. An electric slider is slidably connected on the sliding track in the up - down direction. A fixed disk is fixedly connected to the rear side of the electric slider. A rotating disk is rotatably connected to the rear side of the fixed disk, and the rear surface of the rotating disk is fixedly connected to the mounting sleeve.

[0011] According to an embodiment of the present invention, alignment arrows for facilitating the adjustment of the electric telescopic rod to the vertical state are provided at the top of the circumferential surfaces of the fixed disk and the rotating disk, and the fixed disk and the rotating disk are in frictional fit.

[0012] According to an embodiment of the present invention, the auxiliary member includes a reflector hinged to the bottom end of the telescopic section of the electric telescopic rod. Two symmetrically arranged mounting grooves I are formed on the reflector. Two vertically arranged sliding rods I are fixedly connected inside the mounting groove I. A calibration strip I is slidably connected to the circumferential surfaces of the two sliding rods I, and the calibration strip I is in sliding fit with the mounting groove I.

[0013] According to an embodiment of the present invention, a first return spring is sleeved on the circumferential surface of the sliding rod I between the upper surface of the calibration strip I and the inner wall of the top end of the mounting groove I, and a scale is provided on the calibration strip I.

[0014] According to an embodiment of the present invention, the auxiliary member further includes two symmetrically arranged inverted L - shaped limiting rods fixedly connected to the left and right sides of the fixed section of the electric telescopic rod. A plurality of uniformly distributed auxiliary rollers are rotatably connected to the vertical sections of the inverted L - shaped limiting rods, which change the sliding friction between the inverted L - shaped limiting rods and the reflector into rolling friction. A limiting plate for limiting the rotation angle of the reflector on the electric telescopic rod is fixedly connected to the rear side of the bottom end of the telescopic section of the electric telescopic rod.

[0015] According to an embodiment of the present invention, the detection member includes a calibration plate fixedly connected to the rear side of the distance sensor. Two symmetrically arranged mounting grooves II are formed on the upper surface of the calibration plate. A horizontally arranged sliding rod II is fixedly connected inside the mounting groove II. A calibration strip II is slidably connected to the circumferential surface of the sliding rod II in the front - rear direction, and the calibration strip II is in sliding fit with the mounting groove II.

[0016] According to an embodiment of the present invention, a second return spring is sleeved on the circumferential surface of the sliding rod II between the front surface of the calibration strip II and the inner wall of the front side of the mounting groove I, and a scale is also provided on the calibration strip II.

[0017] Applying the technical solution of the present invention: 1. Through the setting of the detection mechanism, the position of the inner mold in the outer mold can be measured horizontally and centered after the inner mold is placed. Different measurement steps can be completed by one device, simplifying the measurement steps during the installation of the inner mold.

[0018] 2. Through the setting of the adjustment mechanism, it can be ensured that the distance sensor is in a horizontal state before starting the measurement, and the adjustment mechanism can move flexibly, and it can be directly observed whether the position after movement is in a horizontal state, facilitating the staff to move to different positions for measurement when measuring the position of the inner mold, improving the measurement efficiency. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the precast box girder inner mold construction measurement device provided by the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the adjustment mechanism provided by the present invention.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the detection mechanism provided by the present invention.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the leveling part provided by the present invention.

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the adjustment part provided by the present invention.

[0025] Figure 6 It is provided by the present invention Figure 5 The enlarged view of part A in

[0026] Figure 7 It is a three-dimensional structural schematic diagram of the auxiliary part provided by the present invention.

[0027] Figure 8 It is a schematic diagram of the state change of the reflector from the vertical state to the horizontal state provided by the present invention.

[0028] Figure 9 It is a schematic diagram of the position of the reflector and the calibration plate between the opposite surfaces of the inner mold and the outer mold provided by the present invention.

[0029] Reference numerals: 1, adjusting mechanism; 2, detecting mechanism; 3, distance sensor; 100, inner membrane; 200, outer mold; 11, rectangular frame; 12, leveling member; 21, adjusting member; 22, electric telescopic rod; 23, auxiliary member; 24, detecting member; 121, adjusting screw; 122, positioning sleeve; 123, adjusting slider; 124, support foot; 211, electric slide; 212, sliding track; 213, electric slider; 214, fixed disk; 215, rotating disk; 231, inverted L-shaped limiting rod; 232, limiting plate; 233, first slide bar; 234, first calibration bar; 235, reflector; 236, first installation groove; 241, calibration plate; 242, second slide bar; 243, second calibration bar; 244, second installation groove. Detailed implementation manners

[0030] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] As Figure 1 shown, a construction measurement device for the inner mold of a precast box girder includes an outer mold 200. An inner membrane 100 is placed inside the outer mold 200. A distance sensor 3 for measuring and calibrating the position of the inner membrane 100 inside the outer mold 200 is provided in front of the outer mold 200. An adjusting mechanism 1 for adjusting the level of the distance sensor 3 is provided in front of the outer mold 200. A detecting mechanism 2 for adjusting the position in the left-right direction and the tilt angle of the distance sensor 3 is provided on the adjusting mechanism 1.

[0032] As Figure 1 and Figure 2 shown, the adjusting mechanism 1 includes a rectangular frame 11. Leveling members 12 are provided on both vertical sections of the rectangular frame 11. A horizontal bubble tube is embedded in the upper surface of the lower horizontal section of the rectangular frame 11. The distance sensor 3 is electrically connected to an external display device. The distance sensor 3 can be an infrared distance sensor or a laser distance sensor.

[0033] As Figure 1 and Figure 3As shown, the detection mechanism 2 includes an adjustment member 21 slidably disposed left and right on the adjustment mechanism 1. A telescopic electric rod 22 is fixedly installed at the rear side of the adjustment member 21 through a mounting sleeve. The rear side of the mounting sleeve is fixedly connected to the distance sensor 3. A detection member 24 for calibrating the position of the distance sensor 3 is disposed at the rear side of the distance sensor 3. An auxiliary member 23 for assisting the distance sensor 3 in measuring the clearance distance is disposed at the telescopic end of the telescopic electric rod 22.

[0034] During specific use, first, the inner membrane 100 is lifted by an external device to the inside of the assembled outer mold 200. When the inner membrane 100 is lifted into the outer mold 200, at this time, the rectangular frame 11 is moved to the front side of the inner membrane 100 and the outer mold 200. The leveling member 12 cooperates with the level bubble tube on the rectangular frame 11 to adjust the entire rectangular frame 11 to be horizontal. Then, the position of the distance sensor 3 in the up and down direction is adjusted by the adjustment member 21, and the distance sensor 3 is positioned above the inner membrane 100. At this time, the adjustment member 21 moves in the left and right direction on the rectangular frame 11. Through the reading on the external display device, the staff determines whether the front end of the inner membrane 100 is in a horizontal state. Then, the rectangular frame 11 is moved to the rear side of the inner membrane 100, and the above steps are repeated to measure the horizontal state of the rear side of the inner membrane 100.

[0035] After the measurement of the horizontal state is completed, at this time, according to the inclination angle of the opposite surfaces of the inner membrane 100 and the outer mold 200, the staff adjusts the inclination angle of the distance sensor 3 to be close to the inclination angle of the opposite surfaces of the inner membrane 100 and the outer mold 200 through the adjustment member 21. The telescopic electric rod 22 extends to push the auxiliary member 23 to move downward to fit against the outer wall of the inner membrane 100. At this time, the distance between the opposite surfaces of the inner membrane 100 and the outer mold 200 is measured in cooperation with the distance sensor 3. The staff determines whether the position of the inner membrane 100 inside the outer mold 200 is centered according to the reading on the external display device.

[0036] As Figure 2 and Figure 4 shown, the leveling member 12 includes an adjustment slider 123 slidably connected up and down on the vertical section of the rectangular frame 11. A support foot 124 is fixedly connected to the lower surface of the adjustment slider 123. A positioning sleeve 122 is fixedly connected above the vertical section of the rectangular frame 11 where the adjustment slider 123 is located. An adjustment screw 121 is threadedly connected to the positioning sleeve 122. The bottom end of the adjustment screw 121 is rotatably connected to the upper surface of the adjustment slider 123 through a bearing.

[0037] During specific use, when adjusting the horizontal state of the rectangular frame 11 through the leveling member 12 in cooperation with the horizontal bubble tube on the rectangular frame 11, the staff rotates the adjusting screw 121 on the positioning sleeve 122. At this time, as the adjusting screw 121 continues to rotate, the adjusting screw 121 generates displacement on the positioning sleeve 122. The adjusting screw 121 drives the adjusting slider 123 to slide on the rectangular frame 11, and at the same time drives the supporting feet 124 to move synchronously. The staff observes the position of the bubble in the horizontal bubble tube on the rectangular frame 11 and rotates the rectangular frame 11 on the left and right sides of the rectangular frame 11 forward or backward to adjust the left and right two supporting feet 124 to move up or down, and adjusts the rectangular frame 11 to be horizontal.

[0038] As Figure 3 and Figure 5 shown in the figure, the adjusting member 21 includes an electric slide 211 slidably connected to the horizontal section of the rectangular frame 11 in the left-right direction. A sliding track 212 is fixedly connected between the opposite surfaces of the two electric slides 211. An electric slider 213 is slidably connected to the sliding track 212 in the up-down direction. A fixed disk 214 is fixedly connected to the rear side of the electric slider 213. A rotating disk 215 is rotatably connected to the rear side of the fixed disk 214. The rear surface of the rotating disk 215 is fixedly connected to the mounting sleeve.

[0039] As Figure 3 and Figure 5 shown in the figure, alignment arrows for facilitating the adjustment of the electric telescopic rod 22 to the vertical state are provided at the top of the circumferential surfaces of the fixed disk 214 and the rotating disk 215. The fixed disk 214 and the rotating disk 215 are in frictional fit, and the rotating disk 215 remains stationary on the fixed disk 214 when not subjected to external forces.

[0040] During specific use, after the horizontal state of the rectangular frame 11 is adjusted, when measuring the horizontal state of the inner membrane 100 by driving the distance sensor 3 through the adjusting member 21: First, the electric slider 213 slides in the up-down direction on the sliding track 212, and drives the distance sensor 3 to move synchronously through the fixed disk 214 and the rotating disk 215, and adjusts the position of the distance sensor 3 to be above the inner membrane 100. Then, the electric slide 211 slides in the left-right direction on the rectangular frame 11, and drives the electric slider 213 to move synchronously through the sliding track 212. At this time, the distance sensor 3 translates in the left-right direction above the inner membrane 100. The staff judges whether the position of the inner membrane 100 is horizontal according to the reading on the external display device during the movement of the distance sensor 3.

[0041] As Figure 3 and Figure 7As shown in the figure, the auxiliary part 23 includes a reflector 235 hinged to the bottom end of the telescopic section of the electric telescopic rod 22. A torsion spring (not shown in the figure) is provided at the hinged position between the reflector 235 and the telescopic section of the electric telescopic rod 22. When the reflector 235 is in a vertical state on the telescopic section of the electric telescopic rod 22, the torsion spring is in a tightened state. Two symmetrically arranged mounting grooves 236 are provided on the reflector 235. Two vertically arranged sliding rods 233 are fixedly connected inside the mounting groove 236. A calibration strip 234 is slidably connected to the circumferential surfaces of the two sliding rods 233. The calibration strip 234 is slidably matched with the mounting groove 236. A first return spring is sleeved between the upper surface of the calibration strip 234 and the inner wall of the top end of the mounting groove 236 on the circumferential surface of the sliding rod 233. The calibration strip 234 is provided with scales.

[0042] As Figure 3 、 Figure 7 and Figure 8 shown in the figure, the auxiliary part 23 also includes two symmetrically arranged inverted L-shaped limiting rods 231 fixedly connected to the left and right sides of the fixed section of the electric telescopic rod 22. A plurality of evenly distributed auxiliary rollers are rotatably connected to the vertical sections of the inverted L-shaped limiting rods 231. The auxiliary rollers change the sliding friction between the inverted L-shaped limiting rods 231 and the reflector 235 into rolling friction. A limiting plate 232 for limiting the rotation angle of the reflector 235 on the electric telescopic rod 22 is fixedly connected to the rear side of the bottom end of the telescopic section of the electric telescopic rod 22.

[0043] In specific use, when the rectangular frame 11 completes the adjustment of the horizontal state and then measures the centered state of the inner film 100 by driving the distance sensor 3 through the adjusting part 21: First, the staff applies a thrust to the electric telescopic rod 22 according to the inclination degree between the opposite surfaces of the inner film 100 and the outer mold 200. The electric telescopic rod 22 deflects and drives the rotating disk 215 to rotate on the fixed disk 214 through the mounting sleeve, adjusting the inclination angle of the distance sensor 3 to be close to the inclination angle between the opposite surfaces of the inner film 100 and the outer mold 200. At this time, the electric telescopic rod 22 extends, pushing the reflector 235 to move away from the inverted L-shaped limiting rod 231. With the auxiliary rollers on the inverted L-shaped limiting rod 231, the friction between the reflector 235 and the inverted L-shaped limiting rod 231 can be made smaller, facilitating the relative sliding between the reflector 235 and the inverted L-shaped limiting rod 231. When the reflector 235 moves away from the inverted L-shaped limiting rod 231, under the action of the self-elastic force of the torsion spring between the reflector 235 and the electric telescopic rod 22, and with the limiting effect of the limiting plate 232, the reflector 235 changes from a horizontal state with the electric telescopic rod 22 to a vertical state (as Figure 8 shown in the figure).

[0044] As Figure 3 、 Figure 6 and Figure 9As shown, the detection piece 24 includes a calibration plate 241 fixedly connected to the rear side of the distance sensor 3. On the upper surface of the calibration plate 241, there are two symmetrically arranged second mounting grooves 244 on the left and right. Inside the second mounting grooves 244, there is a horizontally arranged second sliding rod 242 fixedly connected. On the circumferential surface of the second sliding rod 242, a second calibration strip 243 is slidably connected in the front-rear direction. The second calibration strip 243 is slidably matched with the second mounting groove 244. A second return spring is sleeved on the circumferential surface of the second sliding rod 242 between the front surface of the second calibration strip 243 and the front inner wall of the first mounting groove 236. The second calibration strip 243 is also provided with scales.

[0045] During specific use, as the electric telescopic rod 22 extends, when the distance between the reflector 235 and the fixed disk 214 approaches the distance between the opposite surfaces of the inner film 100 and the outer mold 200, at this time, the electric telescopic rod 22 stops extending. The staff moves the rectangular frame 11 to place the reflector 235 and the calibration plate 241 between the opposite surfaces of the inner film 100 and the outer mold 200 (as Figure 9 shown). Then, the rectangular frame 11 is adjusted to be horizontal. At this time, both the reflector 235 and the calibration plate 241 enter a certain distance between the opposite surfaces of the inner film 100 and the outer mold 200. Since both the second calibration strip 243 and the first calibration strip 234 are stuck on the outer edges of the front ends of the outer mold 200 and the inner film 100, both the second calibration strip 243 and the first calibration strip 234 are subjected to the resistance from the inner film 100 and the outer mold 200 and slide a certain distance inside the second mounting groove 244 and the first mounting groove 236 respectively. At the same time, the first return spring and the second return spring are both compressed. At this time, the staff judges whether the reflector 235 and the calibration plate 241 are in contact with the surfaces of the inner film 100 and the outer mold 200 by cooperating with the scales on the first calibration strip 234 and the second calibration strip 243. For example, to judge whether the calibration plate 241 is in contact with the surface of the outer mold 200, through the scales on the two second calibration strips 243 on the calibration plate 241, when the calibration plate 241 is completely in contact with the outer mold 200, at this time, the scales extended by the two second calibration strips 243 on the front outer edge of the outer mold 200 are the same.

[0046] Then, the staff repeats the above steps to measure multiple positions on the opposite surfaces of the inner film 100 and the outer mold 200, and judges whether the position of the inner film 100 inside the outer mold 200 is in the centered position according to the readings on the external display device measured at multiple positions.

[0047] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0048] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A construction measurement device for an internal form of a precast box girder, comprising an external form, an internal form is placed inside the external form, and a distance sensor for measuring and calibrating the position of the internal form inside the external form is arranged in front of the external form, and it is characterized in that: A regulating mechanism for adjusting the level of the distance sensor is provided in front of the outer mold, and a detecting mechanism for adjusting the left - right position and tilt angle of the distance sensor is provided on the regulating mechanism; The detecting mechanism includes an adjusting member slidably arranged left - and - right on the regulating mechanism. An electric telescopic rod is fixedly installed at the rear side of the adjusting member through a mounting sleeve. The rear side of the mounting sleeve is fixedly connected to the distance sensor. A detecting member for calibrating the position of the distance sensor is arranged at the rear side of the distance sensor. An auxiliary member for assisting the distance sensor in measuring the clearance distance is arranged at the telescopic end of the electric telescopic rod; The regulating mechanism includes a rectangular frame, and leveling members are arranged on both vertical sections of the rectangular frame; By driving the distance sensor to displace horizontally on the regulating mechanism through the adjusting member, it can be detected whether the inner mold is horizontal inside the outer mold. By adjusting the tilt angle of the distance sensor with the adjusting member and cooperating with the auxiliary member and the detecting member to be clamped in the gap between the inner mold and the outer mold, it can be detected whether the placement position of the inner mold inside the outer mold is centered.

2. The construction measurement device for the internal form of precast box girders according to claim 1, wherein: A horizontal bubble tube is embedded on the upper surface of the lower horizontal section of the rectangular frame, and the distance sensor is electrically connected to an external display device.

3. The construction measurement device for the internal form of precast box girders according to claim 1, wherein: The leveling member includes an adjusting slider slidably connected up - and - down on the vertical section of the rectangular frame. A support foot is fixedly connected to the lower surface of the adjusting slider. A positioning sleeve is fixedly connected above the adjusting slider on the vertical section of the rectangular frame. An adjusting screw is threadedly connected to the positioning sleeve, and the bottom end of the adjusting screw is rotatably connected to the upper surface of the adjusting slider through a bearing.

4. A construction surveying device for the internal formwork of precast box girders according to claim 1, characterized in that: The adjusting member includes an electric slide seat slidably connected left - and - right on the horizontal section of the rectangular frame. A sliding track is fixedly connected between the opposite surfaces of the two electric slide seats. An electric slider is slidably connected up - and - down on the sliding track. A fixed disk is fixedly connected to the rear side of the electric slider. A rotating disk is rotatably connected to the rear surface of the fixed disk, and the rear surface of the rotating disk is fixedly connected to the mounting sleeve.

5. A construction surveying device for the internal formwork of precast box girders according to claim 4, characterized in that: Alignment arrows for facilitating the adjustment of the electric telescopic rod to the set state are arranged at the top of the circumferential surfaces of the fixed disk and the rotating disk, and the fixed disk and the rotating disk are in frictional fit.

6. The construction surveying device for the internal formwork of precast box girders according to claim 1, wherein: The auxiliary member includes a reflector hinged to the bottom end of the telescopic section of the electric telescopic rod. Two symmetrically arranged mounting grooves I are opened on the reflector. Two vertically arranged sliding rods I are fixedly connected inside the mounting groove I. A calibration strip I is slidably connected on the circumferential surfaces of the two sliding rods I, and the calibration strip I is in sliding fit with the mounting groove I.

7. A construction surveying device for the internal formwork of precast box girders according to claim 6, characterized in that: A first return spring is sleeved on the circumferential surface of the sliding rod I between the upper surface of the calibration strip I and the inner wall of the top end of the mounting groove I, and the calibration strip I is provided with scales.

8. A construction survey device for the internal formwork of precast box girders according to claim 1, characterized in that: The auxiliary member further includes two symmetrically arranged inverted L - shaped limiting rods fixedly connected to the left and right side surfaces of the fixed section of the electric telescopic rod. A plurality of evenly distributed auxiliary rollers are rotatably connected to the vertical sections of the inverted L - shaped limiting rods. The auxiliary rollers change the sliding friction between the inverted L - shaped limiting rods and the reflector into rolling friction. A limiting plate for limiting the rotation angle of the reflector on the electric telescopic rod is fixedly connected to the rear side of the bottom end of the telescopic section of the electric telescopic rod.

9. A construction measurement device for the internal formwork of precast box girders according to claim 1, characterized in that: The detection piece includes a calibration plate fixedly connected to the rear side of the distance sensor. Two symmetrically arranged mounting grooves II are formed on the upper surface of the calibration plate. A horizontally arranged sliding rod II is fixedly connected inside the mounting groove II. A calibration strip II is slidably connected to the circumferential surface of the sliding rod II in the front-back direction, and the calibration strip II is slidably engaged with the mounting groove II.

10. A construction surveying device for the internal formwork of precast box girders according to claim 9, characterized in that: A return spring II is sleeved between the circumferential surface of the sliding rod II and the front surface of the calibration strip II and the front inner wall of the mounting groove I. The calibration strip II is also provided with scales.

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