A variable-diameter concrete cylinder form verticality detection device and a correction method thereof

Abstract

The application discloses a variable-diameter concrete cylindrical formwork perpendicularity detection device and a correction method thereof, which comprises an annular seat, four strip-shaped installation grooves are formed in the circumferential direction of the annular seat, first measuring rods are respectively slidably arranged in two strip-shaped installation grooves located at opposite sides of the annular seat, second measuring rods are respectively slidably arranged in the other two strip-shaped installation grooves located at the opposite sides of the annular seat, first annular gears and second annular gears are movably arranged on the upper and lower end faces of the annular seat, respectively, two first measuring rods and two second measuring rods are connected with the first annular gears and the second annular gears through linkage members and drive the first annular gears and the second annular gears to rotate through the axial displacement of the first measuring rods and the second measuring rods; the two first measuring rods and the two second measuring rods can be used for measuring the inclination of the cylindrical formwork in two perpendicular degrees of freedom in a horizontal plane, so that the real-time detection of the perpendicularity of the cylindrical formwork is realized, and the perpendicularity of the cylindrical formwork is corrected in a targeted manner.

Description

Technical Field

[0001] This invention relates to the field of verticality testing technology, specifically to a verticality testing device and correction method for a variable-diameter concrete cylindrical formwork. Background Technology

[0002] As people's aesthetic appreciation of architecture improves, more and more irregularly shaped buildings are appearing before our eyes; concrete columns are also being used more and more. In the construction of ultra-high variable diameter concrete columns in building engineering, the method of pouring in sections from bottom to top is generally adopted. When each section of concrete column is implemented, a steel cage is first built on the foundation or a steel cage is placed on site. Then, a steel formwork or wooden formwork is built outside the steel cage to form a hollow cylindrical structure. Then, concrete is poured into the middle and waited for the concrete to solidify to obtain a concrete column.

[0003] Cylindrical formwork is generally erected to meet verticality requirements. However, from the initial erection to the subsequent pouring process, the verticality of the formwork must be maintained at all times; that is, the formwork must not tilt or move even slightly. Traditional methods of verticality testing involve installing several precision instruments around the circumference of the formwork to detect any tilting or slight movement. This method is costly, and in the segmented construction of ultra-high variable-diameter concrete columns, the height of the precision instruments and their radial distance from the formwork must be constantly adjusted, making the operation cumbersome. Furthermore, the use of standardized steel bands supplemented by steel pipe scaffolding for reinforcement, with the scaffolding connected to the beam and slab support system, places extremely high demands on the strength of the steel bands, making it difficult to guarantee verticality. When slight tilting or movement occurs, a specialized correction plan must be developed. All of this undoubtedly makes the detection and correction of cylindrical formwork verticality cumbersome, inefficient, and costly. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a verticality detection device and correction method for variable-diameter concrete cylindrical formwork, which solves the problem that existing technologies struggle to detect and correct the verticality of cylindrical formwork in real time.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, a verticality testing device for variable-diameter concrete cylindrical formwork is provided, comprising an annular seat. Four strip-shaped mounting slots are formed on the circumference of the annular seat, arranged in a cross shape and located radially on the annular seat. First measuring rods are slidably inserted into two of the strip-shaped mounting slots on opposite sides of the annular seat, and second measuring rods are slidably inserted into the other two strip-shaped mounting slots on opposite sides of the annular seat. A first ring gear and a second ring gear are movably mounted on the upper and lower end faces of the annular seat, respectively. The two first measuring rods and the two second measuring rods are respectively connected to the first ring gear and the second ring gear via a linkage. The wheel is connected and drives the first ring gear and the second ring gear to rotate through the axial displacement of the first and second measuring rods respectively; the ring seat is provided with a first detection gear and a second detection gear that mesh with the first ring gear and the second ring gear respectively, and the first detection gear and the second detection gear are respectively connected to the first encoder and the second encoder; the outer side of the ring seat is movably sleeved with a rotating seat that is connected to the servo motor, and the rotating seat is provided with a pushing mechanism for laterally pushing the cylindrical template and correcting its verticality. The first encoder, the second encoder, the servo motor and the pushing mechanism are all electrically connected to the controller.

[0007] Furthermore, the lateral openings of the two strip-shaped mounting slots containing the two first measuring rods are located on the upper end face of the annular seat, and the lateral openings of the two strip-shaped mounting slots containing the two second measuring rods are located on the lower end face of the annular seat. The linkage includes linkage rods connected to the first and second measuring rods. The first and second annular gears are respectively provided with a first arc-shaped groove and a second arc-shaped groove on both sides. The two linkage rods connected to the two first measuring rods are slidably disposed in the first arc-shaped groove and the second arc-shaped groove on the first annular gear, and the two linkage rods connected to the two second measuring rods are slidably disposed in the first arc-shaped groove and the second arc-shaped groove on the second annular gear.

[0008] Furthermore, the first arc-shaped groove and the second arc-shaped groove are arranged in a mirror symmetrical manner, and the radial distances between the two ends of the first arc-shaped groove or the second arc-shaped groove and the center of the annular seat are not equal.

[0009] Furthermore, a crossbar is provided on the inner end of both the first and second measuring rods. The crossbar extends horizontally and is perpendicular to the first or second measuring rod connected to it. The outer wall of the crossbar is covered with a rubber layer.

[0010] Furthermore, both the first and second measuring rods have strip-shaped positioning grooves along their extension directions. One end of the linkage rod is provided with a positioning block for fastening to the strip-shaped positioning groove. The side of the positioning block has a sliding hole, and two sliders slide in fit at both ends inside the sliding hole. The linkage rod has a threaded hole communicating with the sliding hole, and a screw is fitted on the threaded hole. A cone is provided on the inner end of the screw, and a pushing slope is provided on the inner end of the slider that slides against the side of the cone.

[0011] Furthermore, annular protrusions are provided at both ends of the sliding hole, and annular grooves that cooperate with the annular protrusions are provided at the outer end of the slider. An elastic rubber ring is provided between the annular protrusions and the annular grooves.

[0012] Furthermore, raised and recessed stripes are provided on the outer end face of the slider and on both sides of the strip positioning groove.

[0013] Furthermore, the jacking mechanism includes a column mounted on a rotating seat, and a telescopic cylinder mounted on the column with its telescopic direction located radially in front of the rotating seat, and the telescopic end of the telescopic cylinder pointing towards the center of the rotating seat.

[0014] Secondly, a method for correcting the verticality detection device of a variable-diameter concrete cylindrical formwork is provided, which includes the following steps:

[0015] S1: Fit the annular seat gap onto the completed cylindrical formwork, fix the annular seat to the scaffolding around the cylindrical formwork through several connectors, and set the annular seat and the cylindrical formwork coaxially.

[0016] S2: After inserting the two first measuring rods and the second measuring rod into the four strip mounting slots respectively, install crossbars on the inner ends of the first measuring rods and the second measuring rods, and make the middle parts of the four crossbars abut against the four sides of the cylindrical template respectively.

[0017] S3: Pass the four linkage rods through the middle of the two first arc-shaped grooves and the two second arc-shaped grooves respectively, and fasten them to the strip positioning groove through the positioning block. Then, zero the first encoder and the second encoder.

[0018] S4: By analyzing the forward and reverse signals of the first and second encoders, as well as the angular displacement signal, the horizontal direction of the cylindrical template inclination is obtained;

[0019] S5: The rotating seat is driven by a servo motor to rotate until the telescopic cylinder is in the horizontal direction of the inclined cylindrical template. The telescopic cylinder then provides lateral support to the cylindrical template until the first and second encoders are reset to zero, thus correcting the verticality of the cylindrical template.

[0020] Furthermore, the specific analytical methods in step S4 include:

[0021] A1: Construct a Cartesian coordinate system based on the cross lines formed by the two first measuring rods and the two second measuring rods, and find the tilt reference point O of the cylindrical template in the Cartesian coordinate system. 斜 ;

[0022] When both the first and second encoders are rotating forward, the tilt reference point O 斜 The coordinates are ( d 1, d2) When both the first encoder and the second encoder are reversed, the tilt reference point O 斜 The coordinates are (- d 1, - d 2) When the first encoder rotates forward and the second encoder rotates in reverse, the tilt reference point O 斜 The coordinates are ( d 1, - d 2) When the first encoder rotates in reverse and the second encoder rotates in forward, the tilt reference point O... 斜 The coordinates are (- d 1, d 2), of which d 1 represents the angular displacement of the first encoder. d 2 represents the angular displacement of the second encoder;

[0023] A2: Origin of coordinate system and inclined reference point O 斜 The horizontal direction of the line connecting the two is the horizontal direction of the tilt of the cylindrical template.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This scheme uses two first measuring rods and two second measuring rods to measure the tilting micro-motion of the cylindrical template in two vertical degrees of freedom on the horizontal plane, thus realizing real-time detection of the verticality of the cylindrical template. At the same time, the radial micro-displacement of the first and second measuring rods can be characterized by the rotation of the first and second ring gears, respectively. Then, the first and second encoders can detect the forward and reverse rotation signals and angular displacement signals of the first and second ring gears, and analyze them to obtain the tilt reference point of the cylindrical template, thereby accurately determining the tilt direction of the cylindrical template. Then, the telescopic cylinder is rotated to the tilt direction and the cylindrical template is laterally supported, thus realizing the correction of the verticality of the cylindrical template.

[0026] 2. In this scheme, the difference in radial distance between the two ends of the first or second arc-shaped groove and the center of the annular seat is much smaller than the dimension of the first or second arc-shaped groove in the extension direction. This results in the rotational displacement of the first or second annular gear being much greater than the radial displacement of the two first or two second measuring rods. Furthermore, the radial dimensions of the first and second detection gears are much smaller than the radial dimensions of the first and second annular gears. This further amplifies the rotational displacement, thereby amplifying the displacement signal and reducing measurement errors. This improves the accuracy and precision of subsequent cylindrical template tilt direction detection.

[0027] 3. This solution uses crossbars installed on the inner ends of the first and second measuring rods to allow the two first and two second measuring rods to fully measure the displacement of the cylindrical formwork in two vertical degrees of freedom on the horizontal plane. The rubber layer provides a certain degree of shock absorption, preventing the first and second measuring rods from frequently moving when the cylindrical formwork experiences slight vibrations during actual pouring construction. At the same time, the rubber layer also has a certain elastic deformation capacity, providing displacement compensation for the slight movement of the distance between the two crossbars on the inner ends of the two first or two second measuring rods.

[0028] 4. The linkage rod of this solution can be fastened to any position in the extension direction of the strip positioning groove through the positioning block, so that the radial position of the first and second measuring rods on the annular seat can be adjusted during installation, thereby realizing the verticality detection and correction of cylindrical templates with different radial dimensions. Attached Figure Description

[0029] Figure 1 This is a top view of the verticality detection device for variable diameter concrete cylindrical formwork.

[0030] Figure 2 This is a bottom view of the verticality detection device for variable diameter concrete cylindrical formwork.

[0031] Figure 3 for Figure 1 A cross-sectional view of region AA in the middle.

[0032] Figure 4 for Figure 1 Cross-sectional view of the BB region.

[0033] Figure 5 for Figure 1 A cross-sectional view of the CC region.

[0034] Figure 6 This is a schematic diagram of the structure in which the first measuring rod is fastened to the linkage rod.

[0035] Among them, 1. Annular seat, 2. Strip mounting groove, 3. First measuring rod, 4. Second measuring rod, 5. First ring gear, 6. Second ring gear, 7. Annular recessed platform, 8. Annular protrusion, 9. Linkage rod, 10. First arc groove, 11. Second arc groove, 12. First detection gear, 13. Second detection gear, 14. First encoder, 15. Rotary seat, 16. Annular drive gear, 17. Servo motor, 18. Transmission gear, 19. Column, 20. Telescopic cylinder, 21. Crossbar, 22. Strip positioning groove, 23. Positioning block, 24. Sliding hole, 25. Sliding block, 26. Threaded hole, 27. Screw, 28. Conical head, 29. Pushing inclined surface, 30. Elastic rubber ring, 31. Concave and convex stripes, 32. Cylindrical template. Detailed Implementation

[0036] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0037] like Figures 1 to 6 As shown, the verticality detection device for the variable diameter concrete cylindrical formwork 32 of this scheme includes an annular seat 1. The annular seat 1 has four strip-shaped mounting slots 2 on its circumference, and the four strip-shaped mounting slots 2 are arranged in a cross shape and located on the radial side of the annular seat 1. First measuring rods 3 are slidably inserted into the two strip-shaped mounting slots 2 located on opposite sides of the annular seat 1, and the lateral openings of the two strip-shaped mounting slots 2 where the two first measuring rods 3 are located are located on the upper end face of the annular seat 1. Second measuring rods 4 are slidably inserted into the other two strip-shaped mounting slots 2 located on opposite sides of the annular seat 1, and the lateral openings of the two strip-shaped mounting slots 2 where the two second measuring rods 4 are located are located on the lower end face of the annular seat 1. A first annular gear 5 and a second annular gear 6 are movably arranged on the upper and lower end faces of the annular seat 1, respectively. Specifically, an annular recess 7 is provided on the outer surface of the first annular gear 5 and the second annular gear 6, and annular protrusions 8 are provided at both ends of the annular seat 1. The annular recess 7 and the annular protrusions 8 are rotatably connected by bearings.

[0038] Two first measuring rods 3 and two second measuring rods 4 are connected to a first ring gear 5 and a second ring gear 6 respectively via a linkage, and drive the first ring gear 5 and the second ring gear 6 to rotate via the axial displacement of the first measuring rods 3 and the second measuring rods 4 respectively; wherein the linkage includes a linkage rod 9 connected to the first measuring rods 3 and the second measuring rods 4, and a first arc groove 10 and a second arc groove 11 are respectively provided on both sides of the first ring gear 5 and the second ring gear 6. The two linkage rods 9 connected to the two first measuring rods 3 are slidably disposed in the first arc groove 10 and the second arc groove 11 on the first ring gear 5, and the two linkage rods 9 connected to the two second measuring rods 4 are slidably disposed in the first arc groove 10 and the second arc groove 11 on the second ring gear 6.

[0039] The annular seat 1 is provided with a first detection gear 12 and a second detection gear 13 that mesh with the first annular gear 5 and the second annular gear 6, respectively. The first detection gear 12 and the second detection gear 13 are respectively connected to the first encoder 14 and the second encoder. A rotating seat 15 is movably sleeved on the outer side of the annular seat 1 via bearings. An annular drive gear 16 is provided at the lower end of the rotating seat 15. A servo motor 17 is provided on the annular seat 1. A transmission gear 18 that meshes with the annular drive gear 16 is provided on the rotating shaft of the servo motor 17, so that the servo motor 17 can drive and precisely adjust the rotation angle of the rotating seat 15. A pushing mechanism is provided on the rotating seat 15 for laterally pushing the cylindrical template 32 and correcting its verticality. The pushing mechanism includes a column 19 provided on the rotating seat 15. A telescopic cylinder 20 with its extension and retraction direction located in the radial direction of the rotating seat 15 is provided on the column 19, and the extension and retraction end of the telescopic cylinder 20 points to the center of the rotating seat 15. The first encoder 14, the second encoder, the servo motor 17 and the pushing mechanism are all electrically connected to the controller.

[0040] This scheme uses two first measuring rods 3 and two second measuring rods 4 to measure the tilting micro-motion of the cylindrical template 32 in two vertical degrees of freedom on the horizontal plane, thus realizing real-time detection of the verticality of the cylindrical template 32. At the same time, the radial micro-displacement of the first measuring rods 3 and the second measuring rods 4 can be characterized by the rotation of the first ring gear 5 and the second ring gear 6, respectively. Then, the first encoder 14 and the second encoder can detect the forward and reverse rotation signals and angular displacement signals of the first ring gear 5 and the second ring gear 6, and analyze them to obtain the tilt reference point of the cylindrical template 32, thereby accurately determining the tilting direction of the cylindrical template 32. Then, the telescopic cylinder 20 is rotated to the tilting direction and the cylindrical template 32 is laterally supported, thus realizing the correction of the verticality of the cylindrical template 32.

[0041] As an optional implementation, the first arc-shaped groove 10 and the second arc-shaped groove 11 are mirror-symmetrically arranged, and the radial distances between the two ends of the first arc-shaped groove 10 or the second arc-shaped groove 11 and the center of the annular seat 1 are not equal. In this scheme, when the two first measuring rods 3 or the two second measuring rods 4 undergo radial displacement, the linkage rods 9 on them will also undergo radial displacement. The radially displaced linkage rods 9 will slide in the first arc-shaped groove 10 and the second arc-shaped groove 11, thereby driving the first annular gear 5 or the second annular gear 6 to rotate. At the same time, the first arc-shaped groove 10 and the second arc-shaped groove 11 are mirror-symmetrically arranged, so that the sliding fit relationship between the two linkage rods 9 on the two first measuring rods 3 or the two second measuring rods 4 and the first arc-shaped groove 10 and the second arc-shaped groove 11 is opposite, thereby realizing the same-direction displacement of the two first measuring rods 3 or the two second measuring rods 4.

[0042] Specifically, in this scheme, because the difference in radial distance between the two ends of the first arc groove 10 or the second arc groove 11 and the center of the annular seat 1 is much smaller than the dimension of the first arc groove 10 or the second arc groove 11 in the extension direction, the rotational displacement of the first annular gear 5 or the second annular gear 6 is much greater than the radial displacement of the two first measuring rods 3 or the two second measuring rods 4. This means that when the first measuring rod 3 or the second measuring rod 4 has a small displacement, the first annular gear 5 or the second annular gear 6 can also generate a large rotational displacement. Furthermore, the radial dimensions of the first detection gear 12 and the second detection gear 13 are much smaller than the radial dimensions of the first annular gear 5 and the second annular gear 6, thereby further amplifying the rotational displacement and amplifying the displacement signal. This helps to reduce measurement errors and improve the accuracy and precision of subsequent tilt direction detection of the cylindrical template 32.

[0043] As an optional implementation, a crossbar 21 is provided on the inner end of both the first measuring rod 3 and the second measuring rod 4. The crossbar 21 extends horizontally and is perpendicular to the first measuring rod 3 or the second measuring rod 4 connected to it. The crossbar 21 allows the two first measuring rods 3 and the two second measuring rods 4 to fully measure the displacement of the cylindrical template 32 in two vertical degrees of freedom on the horizontal plane. The outer wall of the crossbar 21 is covered with a rubber layer. The rubber layer plays a certain role in shock absorption, so that when the cylindrical template 32 vibrates slightly due to actual pouring construction, it will not cause the first measuring rod 3 and the second measuring rod 4 to move frequently. At the same time, the rubber layer also has a certain elastic deformation capacity, providing displacement compensation for the slight movement of the distance between the two crossbars 21 at the inner end of the two first measuring rods 3 or the two second measuring rods 4.

[0044] As an optional implementation, both the first measuring rod 3 and the second measuring rod 4 are provided with strip-shaped positioning grooves 22 in their extension directions. One end of the linkage rod 9 is provided with a positioning block 23 for fastening to the strip-shaped positioning groove 22. The side of the positioning block 23 is provided with a sliding hole 24. Two sliders 25 are slidably fitted inside the sliding hole 24. The linkage rod 9 is provided with a threaded hole 26 communicating with the sliding hole 24. A screw 27 is fitted on the threaded hole 26. A cone 28 is provided on the inner end of the screw 27. A pushing inclined surface 29 that slides and fits against the side of the cone 28 is provided on the inner end of the slider 25.

[0045] As an optional implementation, an annular protrusion 8 is provided at both ends of the sliding hole 24, and an annular groove that cooperates with the annular protrusion 8 is provided at the outer end of the slider 25. An elastic rubber ring 30 is provided between the annular protrusion 8 and the annular groove. Concave and convex stripes 31 are provided on the outer end face of the slider 25 and both sides of the strip positioning groove 22.

[0046] In this design, the linkage rod 9 can be fastened to the strip positioning groove 22 via the positioning block 23. Specifically, the positioning block 23 is inserted into the strip positioning groove 22 and the screw 27 is rotated, causing the cone head 28 to slide on the pushing inclined surface 29, and pushing the sliders 25 on both sides to slide outwards until the concave and convex stripes 31 on the outer end face of the slider 25 are pressed tightly against the concave and convex stripes 31 on both sides of the strip positioning groove 22, thus achieving a fastened connection. The annular convex rib 8 can prevent the slider 25 from sliding out of the sliding hole 24, and the elastic rubber ring 30 provides flexible contact while allowing the slider 25 to automatically slide back to its inner end. Since the linkage rod 9 can be fastened to any position in the extension direction of the first measuring rod 3 and the second measuring rod 4, the radial position of the first measuring rod 3 and the second measuring rod 4 on the annular seat 1 can be adjusted during installation, thereby realizing the verticality detection and correction of cylindrical templates 32 with different radial dimensions.

[0047] This solution also provides a calibration method for a verticality detection device for a variable-diameter concrete cylindrical formwork 32, which includes the following steps:

[0048] S1: The annular seat 1 is fitted onto the completed cylindrical template 32 with a gap, and the annular seat 1 is fixed to the scaffolding around the cylindrical template 32 by several connectors, and the annular seat 1 and the cylindrical template 32 are set coaxially.

[0049] S2: After inserting the two first measuring rods 3 and the second measuring rod 4 into the four strip mounting slots 2 respectively, install the crossbars 21 on the inner ends of the first measuring rods 3 and the second measuring rods 4, and make the middle parts of the four crossbars 21 abut against the four sides of the cylindrical template 32 respectively.

[0050] S3: Pass the four linkage rods 9 through the middle of the two first arc-shaped grooves 10 and the two second arc-shaped grooves 11 respectively, and fasten them to the strip positioning groove 22 through the positioning block 23, so that the first arc-shaped grooves 10 and the second arc-shaped grooves 11 can rotate in the forward and reverse directions relative to the linkage rods 9; then perform zeroing on the first encoder 14 and the second encoder.

[0051] S4: By analyzing the forward and reverse signals of the first encoder 14 and the second encoder, as well as the angular displacement signal, the horizontal direction of the inclination of the cylindrical template 32 is obtained; the specific analysis method includes:

[0052] A1: Construct a Cartesian coordinate system based on the cross lines of the two first measuring rods 3 and the two second measuring rods 4, and find the inclined reference point O of the cylindrical template 32 in the Cartesian coordinate system. 斜 ;

[0053] When both the first encoder 14 and the second encoder are rotating forward, the tilt reference point O 斜 The coordinates are ( d 1, d2) When both the first encoder 14 and the second encoder are reversed, the tilt reference point O 斜 The coordinates are (- d 1, - d 2) When the first encoder 14 rotates forward and the second encoder rotates in reverse, the tilt reference point O 斜 The coordinates are ( d 1, - d 2) When the first encoder 14 rotates in reverse and the second encoder rotates in forward, the tilt reference point O... 斜 The coordinates are (- d 1, d 2), of which d 1 represents the angular displacement of the first encoder 14. d 2 represents the angular displacement of the second encoder;

[0054] A2: Origin of coordinate system and inclined reference point O 斜 The horizontal direction of the line connecting the two is the horizontal direction of the inclination of the cylindrical template 32.

[0055] S5: The servo motor 17 drives the rotating seat 15 to rotate until the telescopic cylinder 20 is located in the horizontal direction of the inclined cylindrical template 32, and the telescopic cylinder 20 provides lateral support to the cylindrical template 32 until the first encoder 14 and the second encoder are reset to zero, thereby correcting the verticality of the cylindrical template 32.

[0056] This scheme uses two first measuring rods 3 and two second measuring rods 4 to measure the tilting micro-motion of the cylindrical template 32 in two vertical degrees of freedom on the horizontal plane. The angular displacement signals of the first encoder 14 and the second encoder are amplified to characterize the micro-motion displacement of the cylindrical template 32 in the two vertical degrees of freedom, thereby reducing measurement error and improving measurement accuracy. The forward and reverse signals of the first encoder 14 and the second encoder are used to characterize the displacement direction of the cylindrical template 32 in the two vertical degrees of freedom. By constructing a plane rectangular coordinate system, the horizontal direction of the tilt of the cylindrical template 32 is accurately found. The telescopic cylinder 20 is used to provide targeted lateral support to the cylindrical template 32 to correct its verticality.

Claims

1. A device for detecting the verticality of a variable-diameter concrete cylindrical formwork, characterized in that, The device includes an annular seat (1), which has four strip-shaped mounting slots (2) on its circumference. The four strip-shaped mounting slots (2) are arranged in a cross shape and are located on the radial side of the annular seat (1). A first measuring rod (3) is slidably inserted into the two strip-shaped mounting slots (2) on the opposite side of the annular seat (1), and a second measuring rod (4) is slidably inserted into the other two strip-shaped mounting slots (2) on the opposite side of the annular seat (1). A first ring gear (5) and a second ring gear (6) are movably arranged on the upper and lower end faces of the annular seat (1). The two first measuring rods (3) and the two second measuring rods (4) are connected to the first ring gear (5) and the second ring gear (6) respectively through a linkage and drive the first ring gear (5) and the second ring gear (6) to rotate through the axial displacement of the first measuring rod (3) and the second measuring rod (4). The annular seat (1) is provided with a first detection gear (12) and a second detection gear (13) that mesh with the first annular gear (5) and the second annular gear (6) respectively. The first detection gear (12) and the second detection gear (13) are respectively connected to the first encoder (14) and the second encoder for transmission. The outer side of the ring seat (1) is movably fitted with a rotating seat (15) that is connected to the servo motor (17) for transmission. The rotating seat (15) is provided with a pushing mechanism for laterally pushing the cylindrical template (32) and correcting its verticality. The first encoder (14), the second encoder, the servo motor (17) and the pushing mechanism are all electrically connected to the controller. The lateral openings of the two strip mounting slots (2) where the two first measuring rods (3) are located are set on the upper end face of the annular seat (1), and the lateral openings of the two strip mounting slots (2) where the two second measuring rods (4) are located are set on the lower end face of the annular seat (1). The linkage includes a linkage rod (9) connected to the first measuring rod (3) and the second measuring rod (4). The first annular gear (5) and the second annular gear (6) are respectively provided with a first arc groove (10) and a second arc groove (11) on both sides. The two linkage rods (9) connected to the two first measuring rods (3) are respectively slidably set in the first arc groove (10) and the second arc groove (11) on the first annular gear (5). The two linkage rods (9) connected to the two second measuring rods (4) are respectively slidably set in the first arc groove (10) and the second arc groove (11) on the second annular gear (6). The inner ends of the first measuring rod (3) and the second measuring rod (4) are provided with a crossbar (21). The crossbar (21) extends horizontally and is vertically arranged to connect with the first measuring rod (3) or the second measuring rod (4). The outer wall of the crossbar (21) is covered with a rubber layer. The first measuring rod (3) and the second measuring rod (4) are both provided with strip-shaped positioning grooves (22) in their extension directions. One end of the linkage rod (9) is provided with a positioning block (23) for fastening to the strip-shaped positioning groove (22). The side of the positioning block (23) is provided with a sliding hole (24). Two sliders (25) are slidably fitted inside the sliding hole (24). The linkage rod (9) is provided with a threaded hole (26) communicating with the sliding hole (24). A screw (27) is fitted on the threaded hole (26). A cone (28) is provided on the inner end of the screw (27). A pushing inclined surface (29) is provided on the inner end of the slider (25) and slides against the side of the cone (28). The jacking mechanism includes a column (19) mounted on a rotating seat (15), and a telescopic cylinder (20) mounted on the column (19) with its telescopic direction located in the radial direction of the rotating seat (15), and the telescopic end of the telescopic cylinder (20) pointing towards the center of the rotating seat (15).

2. The verticality detection device for variable diameter concrete cylindrical formwork according to claim 1, characterized in that, The first arc groove (10) and the second arc groove (11) are mirror-symmetrically arranged, and the two ends of the first arc groove (10) or the second arc groove (11) are not equidistant from the radial distance of the center of the annular seat (1).

3. The verticality detection device for variable diameter concrete cylindrical formwork according to claim 1, characterized in that, Both ends of the sliding hole (24) are provided with annular protrusions (8), and the outer end of the slider (25) is provided with annular grooves that cooperate with the annular protrusions (8). An elastic rubber ring (30) is provided between the annular protrusions (8) and the annular grooves.

4. The verticality detection device for variable diameter concrete cylindrical formwork according to claim 1, characterized in that, The outer end face of the slider (25) and both sides of the strip positioning groove (22) are provided with concave and convex stripes (31).

5. A correction method for the verticality detection device of variable diameter concrete cylindrical formwork according to any one of claims 1-4, characterized in that, Includes the following steps: S1: The annular seat (1) is fitted onto the completed cylindrical template (32) with a gap. The annular seat (1) is fixed to the scaffolding around the cylindrical template (32) by several connectors, and the annular seat (1) is set coaxially with the cylindrical template (32). S2: After inserting the two first measuring rods (3) and the second measuring rod (4) into the four strip mounting slots (2) respectively, install crossbars (21) on the inner ends of the first measuring rods (3) and the second measuring rods (4), and make the middle part of the four crossbars (21) abut against the four sides of the cylindrical template (32); S3: Pass the four linkage rods (9) through the middle of the two first arc grooves (10) and the two second arc grooves (11) respectively, and fasten them to the strip positioning groove (22) through the positioning block (23). Then, zero the first encoder (14) and the second encoder. S4: By analyzing the forward and reverse signals of the first encoder (14) and the second encoder, as well as the angular displacement signal, the horizontal direction of the tilt of the cylindrical template (32) is obtained; Its specific analytical methods include: A1: Construct a Cartesian coordinate system based on the cross lines of the two first measuring rods (3) and the two second measuring rods (4), and find the inclined reference point O of the cylindrical template (32) in the Cartesian coordinate system. 斜 ; When both the first encoder (14) and the second encoder are rotating forward, the tilt reference point O 斜 The coordinates are ( d 1, d 2); When both the first encoder (14) and the second encoder are reversed, the tilt reference point O 斜 The coordinates are (- d 1, - d 2) When the first encoder (14) rotates forward and the second encoder rotates in reverse, the tilt reference point O 斜 The coordinates are ( d 1, - d 2) When the first encoder (14) rotates in reverse and the second encoder rotates in forward, the tilt reference point O 斜 The coordinates are (- d 1, d 2), of which d 1 represents the angular displacement of the first encoder (14). d 2 represents the angular displacement of the second encoder; A2: Origin of coordinate system and inclined reference point O 斜 The horizontal direction of the line connecting the two is the horizontal direction of the tilt of the cylindrical template (32); S5: Drive the rotating seat (15) to rotate by the servo motor (17) until the telescopic cylinder (20) is located in the horizontal direction of the cylindrical template (32) and the telescopic cylinder (20) provides lateral support to the cylindrical template (32) until the first encoder (14) and the second encoder are reset to zero, thereby realizing the correction of the verticality of the cylindrical template (32).

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