A high-precision rapid positioning and installation device and method for cable ducts

Abstract

The present invention discloses a high-precision rapid positioning and installation device and method for cable ducts, including a support frame which is erected on a flat formwork. The support frame is a triangular support structure with a flat upper surface. A support seat is embedded in the upper surface of the support frame, and a support screw rod is inserted into the support seat for installation and positioning. The upper end of the support screw rod is connected with a positioning ball hinge. Taking the center in the positioning ball hinge as the suspension point, a distance measuring instrument is vertically suspended at the suspension point. The position of the distance measuring instrument is the measuring light-emitting point. A light-transmitting hole is opened at the lower part of the positioning ball hinge. The measuring light emitted by the distance measuring instrument passes through the light-transmitting hole to form a projection point on the formwork, and the distance from the positioning ball hinge to the projection point on the formwork is measured. The present invention can achieve high-precision and rapid installation of cable duct anchor points at any inclination angle, so as to realize the rapid positioning and fine installation of the overall cable duct.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning and installation of cable ducts in construction engineering, and particularly relates to a high-precision rapid positioning and installation device and method for cable ducts. Background Art

[0002] Currently, in the installation process of cable ducts, the method of combining backfield tooling with frontfield installation is usually adopted. The tooling and installation method will determine the quality and efficiency of cable duct installation. The common tooling method is to fabricate a tooling support frame and cooperate with equipment such as cranes. The embedded column feet are welded and fixed during the installation on the tower. However, in the process of using a crane to adjust the cable duct to achieve the control accuracy, the adjustment time is relatively long and the construction cost is high. In the prior art for the positioning and installation of cable ducts, by means of a hoisting device and other auxiliary devices, the anchoring point and the outlet point are repeatedly adjusted. When one point is adjusted accurately and then the other point is adjusted, the position of the previous point will change. Only by repeatedly adjusting can the error be reduced. This construction process wastes time, prolongs the construction period, and increases the economic cost.

[0003] The invention patent application with the application number CN202110014093.3 discloses a cable duct positioning device, including a support frame, a positioning framework and an adjustment mechanism. The support frame includes a basic structure, leveling columns and a horizontal crossbeam. The leveling columns are arranged on the basic structure, and the horizontal crossbeam is arranged on the leveling columns. The positioning framework is arranged on the horizontal crossbeam and is used for positioning and fixing the cable duct therein. The adjustment mechanism is movably arranged on the support frame and can hoist the cable duct to adjust the attitude of the cable duct on the positioning framework. The invention also discloses a cable duct installation method. The above cable duct positioning device and cable duct installation method utilize the adjustment mechanism to adjust the position of the cable duct, quickly and accurately complete the tooling of the outlet end and the anchoring section of the cable duct. Through the plane limiting device, the installation position can be quickly determined. The operator can quickly tool the cable duct in the backfield, reduce the installation operation time on the tower, reduce the risk of high-altitude operation, have high installation efficiency and accuracy, and reduce the production cost. This application positions and installs the cable duct through a complex mechanical device. This method also requires a large amount of manpower, material resources and time costs, and fails to achieve the effect of rapid positioning and installation. At the same time, during the process of installing and positioning the cable duct using this scheme, the positioning points at both ends of the cable duct will also displace, and it is still necessary to repeatedly adjust to reduce the error, so that the technical effect of accurately and quickly positioning the cable duct cannot be achieved by adopting this scheme. Summary of the Invention

[0004] The object of the present invention is to provide a high-precision rapid positioning and installation device and method for cable ducts, aiming at the above-mentioned problems. The device includes a support frame, which is erected on a flat formwork. The support frame is a triangular support structure with a flat upper surface. A support seat is embedded in the upper surface of the support frame. A support screw is inserted into the support seat for installation and positioning. The upper end of the support screw is connected with a positioning ball hinge. Taking the center in the positioning ball hinge as the suspension point, a rangefinder is vertically suspended at the suspension point. The position of the rangefinder is the measurement light-emitting point. A light-transmitting hole is opened at the lower part of the positioning ball hinge. The measurement light emitted by the rangefinder passes through the light-transmitting hole to form a projection point on the formwork. The distance from the positioning ball hinge to the projection point on the formwork is measured. The present invention can achieve the high-precision and rapid installation of the cable duct anchor points at any inclination angle, so as to realize the rapid positioning and fine installation of the whole cable duct.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The present invention discloses a high-precision rapid positioning and installation device for cable ducts, including a support frame, which is erected on a flat formwork. The support frame is a triangular support structure with a flat upper surface. A support seat is embedded in the upper surface of the support frame. A support screw is inserted into the support seat for installation and positioning. The upper end of the support screw is connected with a positioning ball hinge. Taking the center in the positioning ball hinge as the suspension point of the rangefinder, the rangefinder is vertically suspended at the suspension point. The position of the rangefinder is the measurement light-emitting point; The rangefinder is suspended by a flexible wire. Due to the action of gravity, the suspension point of the rangefinder needs to be set to ensure that the laser light emitted by the rangefinder always coincides with the flexible suspension wire. Due to the principle of gravity, this coincidence line is perpendicular to the horizontal plane.

[0007] Further, a light-transmitting hole is opened at the lower part of the positioning ball hinge. The measurement light emitted by the rangefinder passes through the light-transmitting hole to form a projection point on the formwork. The projection point is the plane projection position of the cable duct anchoring point for measuring and laying out the line. The distance from the positioning ball hinge to the projection point on the formwork is measured.

[0008] Further, a bearing plate is installed on the positioning ball hinge. The middle part of the bearing plate is a convex spherical shell. The size of the spherical shell is set to match the size of the positioning ball hinge. The bearing plate is installed on the positioning ball hinge through the spherical shell. After installation, the center of the positioning ball hinge coincides with the center of the spherical shell of the bearing plate.

[0009] Further, limit blocks and limit block moving grooves are provided on the bearing plate. The limit block moving grooves are strip-shaped groove structures and are arranged circumferentially along the spherical shell of the bearing plate to surround the spherical shell of the bearing plate; The limit blocks are arranged in the limit block moving grooves. One end of the cable duct for placement is open on the bearing plate. The limit blocks arranged circumferentially along the spherical shell of the bearing plate fix one end opening of the cable duct. The center of the spherical shell of the bearing plate coincides with the axial position of the cable duct. The coincidence position of the center of the spherical shell and the axis of the cable duct on the bearing plate is the anchoring point of the cable duct.

[0010] Further, the limiting block slides within the limiting block moving groove. The limiting block moving groove includes a limiting distance scale. A limiting block positioning flange nut is provided to position the moving distance of the limiting block within the limiting block moving groove, achieving the purpose of making the center of the anchor plate of the cable duct reside at the center of the positioning ball hinge.

[0011] Further, a thread is provided on the support screw rod. A limiting rotation key groove is provided along the length direction of the support screw rod. The limiting rotation key groove penetrates through the thread and communicates the upper and lower ends of the support screw rod. A limiting rotation protruding key matching the limiting rotation key groove is provided within the support seat.

[0012] Further, the support screw rod is controlled by a nut-type height adjustment disc. The nut-type height adjustment disc is arranged on the upper surface of the support frame and is combined with the support seat to control the position of the support screw rod. A disc rotation hole is provided on the nut-type height adjustment disc. A steel rod is inserted into the disc rotation hole to rotate the nut-type height adjustment disc. The limiting rotation key groove matches the limiting rotation protruding key to form a displacement track for the support screw rod, and the support screw rod generates non-rotating up and down displacement.

[0013] Further, the center of the spherical shell of the bearing plate coincides with the axial center position of the cable duct. The coincident position of the center of the spherical shell and the axial center of the cable duct on the bearing plate forms an anchoring point of the cable duct at one end opening of the cable duct; the axial center position of the other end opening of the cable duct is the outlet point of the cable duct.

[0014] Further, the support screw rod includes a first rod section and a second rod section. The first rod section is a vertical rod, and the limiting rotation key groove is provided on the first rod section. The second rod section connects the first rod section and the positioning ball hinge. The second rod section is inclined to form a transition angle between the first rod section and the positioning ball hinge. The transition angle is set to increase the rotation angle range of the bearing plate and increase the allowable angle range for the installation of the cable duct.

[0015] Further, the size of the spherical shell in the middle of the bearing plate is set to match the size of the positioning ball hinge. Hydraulic oil is applied for lubrication between the spherical shell and the positioning ball hinge. The position of the positioning ball hinge is fixed, and the bearing plate rotates along the outer edge surface of the positioning ball hinge with the spherical shell as the center to adjust the position of the cable duct.

[0016] Further, the anchoring point position of the cable duct is fixed. By rotating the bearing plate, the outlet direction of the cable duct rotates around the anchoring point to adjust the position of the outlet point of the cable duct, quickly matching the installation of the cable duct.

[0017] Further, the steps for quickly positioning and installing using the device are as follows:

[0018] S1: Measuring and setting out lines. After the formwork of the main beam support is erected and preloaded qualified, the project surveyors use a total station to release the projection position of the cable duct anchor point on the formwork. The projection point position can be called point S, and the vertical distance H from this point to the anchor point is given according to the measurement data.

[0019] S2: Translate the support frame above point S, and translate the support frame so that the light-emitting point of the rangefinder aligns with point S.

[0020] S3: Use a Φ10mm steel bar as a lever and insert it into the adjustment disc rotation hole of the adjusting nut type height adjustment disc. Adjust the distance between the spherical hinge center and the formwork to the target value H according to the rangefinder.

[0021] S4: According to the size of the cable duct anchor backing plate, move the limit block in advance. After the limit block is in place, rotate the limit block positioning flange nut to ensure that the anchor point is located at the center of the positioning spherical hinge.

[0022] S5: Lift the bearing plate so that the spherical shell in the middle of the bearing plate wraps the positioning spherical hinge, and rotate the bearing plate to make it in a nearly horizontal state.

[0023] S6: Lift the cable duct corresponding to the current anchor point position. The cable duct is lifted vertically, so that the anchor backing plate is placed on the bearing plate, and the cable duct is surrounded by the limit block to limit the displacement of the cable duct on the bearing plate. Through the above operations, the cable duct anchor point is completely fixed at the center of the positioning spherical hinge.

[0024] S7: According to the preliminary positioning angle of the cable duct, the steel rope of the crane descends the hanging point to control the inclination angle of the cable duct in the vertical plane; manually cooperate to rotate to control the angle of the cable duct in the horizontal plane to adjust the position of the cable duct outlet point until it rotates to the allowable range of the design specification and then fix the cable duct in position.

[0025] S8: After the cable duct is positioned stably, adjust the nut type height adjustment disc in the counterclockwise direction to lower the support screw rod until the support backing plate can be taken out, and complete the installation and positioning work of the cable duct.

[0026] The technical effects of the present invention are as follows:

[0027] The present invention discloses a high-precision cable duct rapid positioning and installation device and method, which realizes high-precision positioning of one point, that is, the anchor point first. And when adjusting the cable duct outlet in the later stage, its anchor point remains at the center of the spherical hinge, and the cable duct can only rotate around this point when adjusting the outlet direction, ensuring that the anchor point positioning does not move, and there is no need to continuously adjust repeatedly to reduce errors, realizing the rapid and high-precision positioning of the whole cable duct. Brief Description of the Drawings

[0028] Figure 1 It is the front view of the support frame of the present invention;

[0029] Figure 2It is the top view of the support frame of the present invention;

[0030] Figure 3 It is the side view of the support frame of the present invention;

[0031] Figure 4 It is the sectional view taken along line A-A of the present invention;

[0032] Figure 5 It is the sectional view taken along line B-B of the present invention;

[0033] Figure 6 It is the sectional view taken along line C-C of the present invention;

[0034] Figure 7 It is the sectional view taken along line D-D of the present invention;

[0035] Figure 8 It is the schematic diagram of the installation of the bearing plate of the present invention;

[0036] Figure 9 It is the sectional view of the installation of the bearing plate of the present invention;

[0037] Figure 10 It is the top view of the bearing plate of the present invention;

[0038] Figure 11 It is the front view of the installation and positioning of the cable duct of the present invention;

[0039] Figure 12 It is the sectional view of the installation and positioning of the cable duct of the present invention;

[0040] Markings in the figure: 1 - support frame, 2 - formwork, 201 - projection point, 3 - support base, 301 - rotation-limiting convex key, 4 - support screw rod, 401 - rotation-limiting keyway, 402 - first rod section, 403 - second rod section, 5 - positioning spherical hinge, 501 - light-transmitting hole, 6 - suspension point, 7 - distance measuring instrument, 8 - bearing plate, 801 - spherical shell, 9 - limit block, 10 - limit block moving groove, 11 - cable duct, 12 - anchoring point, 13 - limit block positioning flange nut, 14 - nut-type height adjusting disc, 1401 - adjusting disc rotation hole, 15 - exit point. Detailed implementation mode

[0041] The present invention will be described in detail below with reference to the accompanying drawings.

[0042] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] In this embodiment, the data adopted are preferred solutions, but they do not limit the present invention;

[0044] Embodiment 1

[0045] AsFigures 1-12 As shown in the figure, this embodiment provides a high-precision quick positioning and installation device for cable ducts, including a support frame. The support frame is made of a steel section support frame, and the support frame is erected on a flat formwork. The support frame is a triangular support structure, and the upper surface of the support frame is flat. A support seat is embedded in the upper surface of the support frame. A support screw rod is inserted into the support seat for installation and positioning. The upper end of the support screw rod is connected with a positioning ball hinge. Taking the center in the positioning ball hinge as the suspension point, a distance measuring instrument is vertically suspended from the suspension point. The position of the distance measuring instrument is the measuring light-emitting point. A light-transmitting hole is opened in the lower part of the positioning ball hinge. The measuring light emitted by the distance measuring instrument passes through the light-transmitting hole to form a projection point on the formwork, and the distance from the positioning ball hinge to the projection point on the formwork is measured. Preferably, since the construction operation environment is mostly during the day, the distance measuring instrument uses a green light infrared distance measuring instrument with high visibility green light.

[0046] In this embodiment, a suspension point is provided at the top of the distance measuring instrument. When it is suspended at the center of the ball hinge by a flexible thin rope, it can ensure that the suspension direction of the flexible line is collinear with the light emitted by the distance measuring instrument. Due to the action of gravity, the flexible line ensures that the ranging light is always perpendicular to the horizontal plane. Even if there is an inclination of the formwork at the position where the support frame is located, and generally there are longitudinal slopes and transverse slopes in bridge girders, it can also ensure that the distance measured by the distance measuring instrument from the center of the ball hinge to the measuring and setting-out point of the anchoring point on the formwork is the plumb distance.

[0047] In this embodiment, a bearing plate is installed on the positioning ball hinge. The middle part of the bearing plate is a convex spherical shell, and the size of the spherical shell is set to match the size of the positioning ball hinge. The bearing plate is installed on the positioning ball hinge through the spherical shell, and after installation, the center of the positioning ball hinge coincides with the center of the spherical shell of the bearing plate. The distance measuring instrument is suspended at the center point of the positioning ball hinge by a flexible line. That is, according to the mechanical principle, the distance measuring instrument suspended at the center point of the positioning ball hinge is in the vertical direction under the action of gravity. When positioning, the support frame is moved to make the projection point of the distance measuring instrument project onto the measuring and setting-out point on the formwork, and the accurate adjustment of the support screw rod is achieved to reach the positioning purpose. In this embodiment, the above structure is adopted to keep the center position of the bearing plate for fixing the cable duct unchanged, that is, to ensure that the center position of the bearing plate of the anchoring point used for connecting with the cable duct remains unchanged.

[0048] In this embodiment, a limiting block and a limiting block moving groove are provided on the bearing plate. The limiting block moving groove is in a strip-shaped groove structure and is arranged along the circumferential direction of the spherical shell of the bearing plate to surround the spherical shell of the bearing plate; the limiting block is arranged in the limiting block moving groove. One end of the placing cable duct opens on the bearing plate. The limiting blocks arranged along the circumferential direction of the spherical shell of the bearing plate fix the opening at one end of the cable duct. The center of the spherical shell of the bearing plate coincides with the axis position of the cable duct. The coincident position of the center of the spherical shell and the axis of the cable duct on the bearing plate is the anchoring point of the cable duct. Further, the limiting block slides and displaces in the limiting block moving groove. The limiting block moving groove includes a limiting distance scale, and a limiting block positioning flange nut is provided to position the moving distance of the limiting block in the limiting block moving groove.

[0049] As Figure 10 shown, in this embodiment, there are three limiting block moving grooves, which are arranged along the circumferential direction of the spherical shell of the bearing plate to surround the spherical shell of the bearing plate from three degrees of freedom directions. The limiting blocks are adjusted in advance according to the size of the anchor plate of the installed cable duct, so that when the cable duct leans against the bearing plate, the anchoring point of the cable duct is located at the center of the bearing plate, that is, the center position of the spherical hinge; preferably, if the size of the anchor plate is 60*60 cm, then the three limiting blocks are adjusted to the 30 cm position and fixed. When the cable duct is placed on the bearing plate, it abuts against the three limiting blocks, and the three limiting blocks form a limiting structure for fixing the cable duct.

[0050] Embodiment 2

[0051] As Figures 1-12 shown, this embodiment provides a high-precision rapid positioning and installation device for a cable duct, including a support frame. The support frame adopts a steel section support frame. The support frame is erected on a flat formwork. The support frame is a triangular support structure, and the upper surface of the support frame is flat. A support seat is embedded in the upper surface of the support frame, and a support screw rod is inserted into the support seat for installation and positioning. The upper end of the support screw rod is connected with a positioning spherical hinge. Taking the center in the positioning spherical hinge as the suspension point, a rangefinder is vertically suspended. The position of the rangefinder is the measurement light-emitting point. A light-transmitting hole is opened at the lower part of the positioning spherical hinge. The measurement light emitted by the rangefinder passes through the light-transmitting hole to form a projection point on the formwork, and the distance from the positioning spherical hinge to the projection point on the formwork is measured.

[0052] In this embodiment, a thread is provided on the support screw rod, and a limiting rotation keyway is arranged along the length direction of the support screw rod. The limiting rotation keyway penetrates through the thread and communicates the upper and lower ends of the support screw rod. A limiting rotation convex key matching the limiting rotation keyway is arranged in the support seat. Further, the support screw rod is controlled by a nut-type height adjustment disc, and the nut-type height adjustment disc is arranged on the upper surface of the support frame and is combined with the support seat to control the position of the support screw rod. A disc rotation hole is provided on the nut-type height adjustment disc, and a steel rod is inserted into the disc rotation hole. When the nut-type height adjustment disc is rotated, the limiting rotation keyway matches the limiting rotation convex key to form a displacement track for the support screw rod, and the support screw rod generates a non-rotating up and down displacement.

[0053] In this embodiment, the position of the anchoring point is further defined not to change. That is, when the support screw rod is adjusted up and down by using the nut-type height adjustment disc, since the limiting rotation keyway on the support screw rod matches the limiting rotation convex key on the support seat, when the nut-type height adjustment disc is rotated, the support screw rod will not rotate but only move vertically up and down, so that the horizontal position of the distance measuring instrument suspended at the center of the positioning ball hinge does not change, realizing the installation of the cable duct. First, a high-precision positioning of a point, that is, the anchoring point, is carried out.

[0054] Embodiment 3

[0055] As Figures 1-12 shown, this embodiment provides a high-precision cable duct rapid positioning and installation device, including a support frame. The support frame adopts a steel section support frame. The support frame is erected on a flat formwork. The support frame is a triangular support structure, and the upper surface of the support frame is flat. A support seat is embedded in the upper surface of the support frame, and a support screw rod is inserted into the support seat for installation and positioning. The upper end of the support screw rod is connected with a positioning ball hinge. Taking the center in the positioning ball hinge as the suspension point, a distance measuring instrument is vertically suspended at the suspension point. The position of the distance measuring instrument is the measurement light-emitting point. A light-transmitting hole is opened at the lower part of the positioning ball hinge. The measurement light emitted by the distance measuring instrument passes through the light-transmitting hole to form a projection point on the formwork, and the distance from the positioning ball hinge to the projection point on the formwork is measured.

[0056] In this embodiment, the positioning and installation device can be scaled up proportionally to be adapted for use with larger-sized cable ducts.

[0057] In this embodiment, the center of the spherical shell of the bearing plate coincides with the axis position of the cable duct. The coincident position of the center of the spherical shell and the axis of the cable duct on the bearing plate forms an anchoring point of the cable duct at one end opening of the cable duct; the axis position of the other end opening of the cable duct is the outlet point of the cable duct.

[0058] In this embodiment, the support screw rod includes a first rod section and a second rod section. The first rod section is a vertical rod, and a limiting rotation keyway is arranged on the first rod section. The second rod section connects the first rod section and the positioning ball hinge. The second rod section is inclined to form a transition angle between the first rod section and the positioning ball hinge. Further, the size of the spherical shell in the middle of the bearing plate matches the size of the positioning ball hinge, and hydraulic oil is applied for lubrication between the spherical shell and the positioning ball hinge. The position of the positioning ball hinge is fixed, and the bearing plate rotates along the outer edge surface of the positioning ball hinge with the spherical shell as the center to adjust the position of the cable duct.

[0059] In this embodiment, by arranging the second rod section inclinedly, a transition angle is formed between the first rod section and the positioning ball hinge, and the transition angle is set to increase the rotation angle of the bearing plate.

[0060] In this embodiment, the anchoring point position of the cable duct is fixed. By rotating the bearing plate, the outlet direction of the cable duct rotates around the anchoring point to adjust the position of the outlet point of the cable duct, and the cable duct can be quickly matched and installed.

[0061] In this embodiment, the distance measuring instrument is suspended at the center point of the positioning ball hinge. The distance measuring instrument is arranged inside the positioning ball hinge. The distance between the light emitting point of the distance measuring instrument and the center point of the positioning ball hinge is a fixed distance H0, and the distance between the light emitting point of the distance measuring instrument and the projection point on the template is a variable distance H1. By rotating the nut-type height adjusting disc, the support screw rod is adjusted up and down to reach the design requirement value H1. Then the target value, that is, the distance H from the measured positioning cable duct anchoring point to the template is H = H0 + H1, so as to realize the positioning of the anchoring end of the cable duct, and the outlet point of the cable duct can be quickly positioned by using a tower crane and manual labor.

[0062] Embodiment 4

[0063] As Figures 1-12 shown, this embodiment provides a high-precision rapid positioning and installation method for a cable duct, including the following steps:

[0064] S1: Measuring and setting out the line. After the main beam support formwork is pre-pressed qualified, the project surveyors use a total station to set out the projection position of the cable duct anchoring point on the formwork. The projection point position can be called point S, and the vertical distance H from this point to the anchoring point is given according to the measurement data.

[0065] S2: Translate the support frame above point S, and translate the support frame so that the light emitting point of the distance measuring instrument aligns with point S.

[0066] S3: Use a Φ10mm steel bar as a lever and insert it into the adjustment disc rotation hole of the adjustment nut-type height adjusting disc, and adjust the distance from the ball hinge center to the formwork to the target value H according to the distance measuring instrument.

[0067] S4: According to the size of the cable duct anchor backing plate, move the limit block in advance. After the limit block is in place, rotate the flange nut of the limit block positioning flange to ensure that the anchoring point is located at the center of the positioning spherical hinge;

[0068] S5: Lift the bearing plate so that the spherical shell in the middle of the bearing plate wraps the positioning spherical hinge, and rotate the bearing plate to make it in a nearly horizontal state;

[0069] S6: Lift the cable duct corresponding to the current anchoring point. The cable duct is lifted vertically so that the anchor backing plate is placed on the bearing plate, and the cable duct is surrounded by the limit block to restrict the displacement of the cable duct on the bearing plate. Through the above operations, the anchoring point of the cable duct is completely fixed at the center of the positioning spherical hinge;

[0070] S7: According to the preliminary positioning angle of the cable duct, the crane hoisting rope lowers the hoisting point of the steel wire rope to control the inclination angle of the cable duct in the vertical plane; manually cooperate to rotate and control the angle of the cable duct in the horizontal plane to adjust the position of the cable duct outlet point until it rotates within the allowable range of the design specification and then fix and position the cable duct;

[0071] S8: After the cable duct is stably positioned, adjust the nut-type height adjustment disc in the counterclockwise direction to lower the support screw rod until the support backing plate can be taken out, and complete the installation and positioning work of the cable duct.

[0072] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision rapid positioning and installation device for cable ducts, comprising a support frame (1), the support frame (1) being erected on a flat formwork (2), the support frame (1) being a triangular support structure with a flat upper surface, characterized in that, The upper surface of the support frame (1) is embedded with a support base (3). A support screw rod (4) is inserted into the support base (3) for installation and positioning. The upper end of the support screw rod (4) is connected with a positioning ball hinge (5). Taking the center in the positioning ball hinge (5) as the suspension point (6), the ranging instrument (7) is vertically suspended at the suspension point (6). The position of the ranging instrument (7) is the measurement light-emitting point. A light-transmitting hole (501) is opened in the lower part of the positioning ball hinge (5). The measurement light emitted by the ranging instrument (7) passes through the light-transmitting hole (501) to form a projection point (201) on the template (2), and the distance from the positioning ball hinge (5) to the projection point (201) on the template (2) is measured. The support screw rod (4) includes a first rod section (402) and a second rod section (403). The first rod section (402) is a vertical rod, and a limiting rotation key groove (401) is arranged on the first rod section (402). The second rod section (403) connects the first rod section (402) and the positioning ball hinge (5). The second rod section (403) is inclined to form a transition angle between the first rod section (402) and the positioning ball hinge (5).

2. The high-precision cable duct rapid positioning and installation device according to claim 1, characterized in that, A bearing plate (8) is installed on the positioning ball hinge (5). The middle part of the bearing plate (8) is a convex spherical shell (801). The size of the spherical shell (801) is set to match the size of the positioning ball hinge (5). The bearing plate (8) is installed on the positioning ball hinge (5) through the spherical shell (801). After installation, the center of the positioning ball hinge (5) coincides with the center of the spherical shell (801) of the bearing plate (8).

3. The high-precision cable duct rapid positioning and installation device according to claim 2, characterized in that, A limiting block (9) and a limiting block moving groove (10) are arranged on the bearing plate (8). The limiting block moving groove (10) is in a strip-shaped groove structure and is arranged around the spherical shell (801) of the bearing plate (8) along the circumferential direction of the spherical shell (801) of the bearing plate (8). The limiting block (9) is arranged in the limiting block moving groove (10). One end of the cable duct (11) is opened on the bearing plate (8). The limiting block (9) arranged along the circumferential direction of the spherical shell (801) of the bearing plate (8) fixes the opening of one end of the cable duct (11). The center of the spherical shell (801) of the bearing plate (8) coincides with the axial center position of the cable duct (11). The anchoring point (12) of the cable duct (11) is located inside the positioning ball hinge (5) and coincides with the center point inside the positioning ball hinge (5).

4. The high-precision cable duct rapid positioning and installation device according to claim 3, characterized in that, The limiting block (9) slides and displaces in the limiting block moving groove (10). The limiting block moving groove (10) includes a limiting distance scale, and a limiting block positioning flange nut (13) is set to position the moving distance of the limiting block (9) in the limiting block moving groove (10).

5. The high-precision cable duct rapid positioning and installation device according to claim 2, wherein, Threads are arranged on the support screw rod (4). A limiting rotation key groove (401) is arranged along the length direction of the support screw rod (4). The limiting rotation key groove (401) passes through the threads and communicates the upper and lower ends of the support screw rod (4). A limiting rotation convex key (301) matching the limiting rotation key groove (401) is arranged in the support base (3).

6. The high-precision cable duct rapid positioning and installation device according to claim 5, characterized in that, The support lead screw (4) is controlled by a nut-type height adjustment disc (14). The nut-type height adjustment disc (14) is arranged on the upper surface of the support frame (1) and is combined with the support seat (3) to control the position of the support lead screw (4). A disc rotation hole (1401) is provided on the nut-type height adjustment disc (14). A steel rod is inserted into the disc rotation hole (1401) to rotate the nut-type height adjustment disc (14). The limiting rotation key groove (401) is matched with the limiting rotation convex key (301) to form a displacement track for the support lead screw (4), and the support lead screw (4) generates non-rotating up and down displacement.

7. The high-precision cable duct rapid positioning and installation device according to claim 6, characterized in that, The center of the spherical shell (801) of the bearing pressure plate (8) coincides with the axis position of the cable duct (11). The coincident position of the center of the spherical shell (801) and the axis of the cable duct (11) on the bearing pressure plate (8) forms an anchoring point (12) at one end opening of the cable duct (11); the axis position of the other end opening of the cable duct (11) is the outlet point (15) of the cable duct (11).

8. The high-precision cable duct rapid positioning and installation device according to claim 7, characterized in that, The size of the middle spherical shell (801) of the bearing pressure plate (8) is set to match the size of the positioning spherical hinge (5). Hydraulic oil is applied for lubrication between the spherical shell (801) and the positioning spherical hinge (5). The position of the positioning spherical hinge (5) is fixed. The bearing pressure plate (8) rotates along the outer edge surface of the positioning spherical hinge (5) with the spherical shell (801) as the center to adjust the position of the cable duct (11); the position of the anchoring point (12) of the cable duct (11) is fixed. By rotating the bearing pressure plate (8), the outlet direction of the cable duct (11) rotates around the anchoring point (12) to adjust the position of the outlet point (15) of the cable duct (11) and quickly match and install the cable duct (11).

9. The high-precision rapid positioning and installation method of cable ducts according to any one of claims 1-8, characterized in that, It includes the following steps: S1: Measuring and setting out. After the formwork preloading of the main beam support is qualified, the project surveyors use a total station to set out the projected position of the anchoring point (12) of the cable duct (11) on the formwork (2). The position of the projection point (201) can be called point S, and the vertical distance H from this point to the anchoring point (12) is given according to the measurement data. S2: Translate the support frame (1) above point S and translate the support frame (1) so that the luminous point of the rangefinder (7) aligns with point S. S3: Use a Φ10mm steel bar as a lever and insert it into the disc rotation hole (1401) of the adjusting nut-type height adjustment disc (14). Adjust the distance between the center of the positioning spherical hinge (5) and the formwork (1) to the target value H according to the rangefinder (7). S4: According to the size of the anchor backing plate of the cable duct (11), move the limit block (9) in advance. After the limit block (9) is in place, rotate the limit block positioning flange nut (13) to ensure that the anchoring point (12) is located at the center of the positioning spherical hinge (5). S5: Lift the bearing pressure plate (8) so that the spherical shell (801) in the middle of the bearing pressure plate (8) wraps the positioning spherical hinge (5), and rotate the bearing pressure plate (8) to make it in a nearly horizontal state. S6: Lift the cable duct (11) corresponding to the current anchoring point (12). Lift the cable duct (11) vertically so that the anchor backing plate is placed on the bearing plate (8), and surround the cable duct (11) with the limit blocks (9) to restrict the displacement of the cable duct (11) on the bearing plate (8). Through this operation, the anchoring point (12) of the cable duct (11) is completely fixed at the center of the positioning spherical hinge (5); S7: According to the preliminary positioning angle of the cable duct (11), lower the hanging point of the steel rope of the crane to control the inclination angle of the cable duct (11) in the vertical plane; Manually cooperate to rotate to control the angle of the cable duct (11) in the horizontal plane to adjust the position of the outlet point (15) of the cable duct (11) until it rotates within the allowable range of the design specifications and then fix the cable duct (11) in position; S8: After the cable duct (11) is stably positioned, adjust the nut-type height adjustment disc (14) in the counterclockwise direction to lower the support screw rod (4) until the support anchor backing plate can be removed, completing the installation and positioning work of the cable duct (11).

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