A precise positioning device for a pre-embedded sleeve and a construction method thereof

Abstract

The application discloses a kind of pre-buried sleeve precision positioning device and its construction method, device includes two cross positioning frame connected by shaft screw, and the temporary locking device and target of telescopic rod connected in the both ends and two end faces of shaft screw;Cross positioning frame includes space six pass, and standard section is inserted into in four directions of up and down and left and right on space six pass, and conical head screw is installed in the other end of standard section, and the axis of cross positioning frame coincides with the center axis of pre-buried sleeve;Temporary locking device includes telescopic rod, and two pairs of telescopic rod are V-shaped, and round steel connection is respectively arranged in V-shaped opening, and two round steels are parallel.Using this pre-buried sleeve positioning device and construction method, the measurement positioning of pre-buried sleeve can be accurately carried out;Reliable reinforcement effectively avoids subsequent process disturbance;Ensure the quality of surrounding concrete pouring.Effectively avoid later rework, block hole, re-open hole, leakage and other problems, greatly improve construction quality and efficiency, effectively reduce construction cost.

Description

Technical Field

[0001] This invention belongs to the field of embedded sleeve technology, specifically relating to a precise positioning device for embedded sleeves and its construction method. Background Technology

[0002] When pipes and cables pass through walls and floors, pre-embedded sleeves must be installed to provide pipe protection and support. For structures requiring waterproofing, pre-embedded sleeves ensure effective waterproofing at joints. Currently, the lack of precise positioning methods and supporting devices during on-site installation of pre-embedded sleeves easily leads to the following common quality problems:

[0003] 1. Misalignment of the conduit position causes bending and twisting of pipes and cables, affecting the appearance quality, resulting in insufficient installation space, insufficient headroom, and even requiring rework of the entire route;

[0004] 2. Inaccurate axial direction of the reserved sleeve can cause problems such as pipeline jamming, excessive friction, pipeline damage, and failure to meet requirements for waterproofing, fireproofing, and airtightness.

[0005] 3. Due to the lack of temporary fixing measures after measurement and positioning, spot welding or simple binding is often used on site to avoid disturbing the position of the embedded sleeve when installing the limiting and fixing steel bars, which can easily lead to unreliable fixing of the embedded sleeve.

[0006] 4. The pre-embedded sleeve is not securely fixed, and the surrounding concrete cannot be fully vibrated, resulting in the local bearing capacity of the structural concrete and the waterproofing of the joints not meeting the design specifications.

[0007] Chinese utility model patent CN220686753U discloses a precise positioning device for pre-embedded pipe sleeves in hydropower projects. The device includes a pipe sleeve, N positioning rods, and a suspension rod (N≥3). The pipe sleeve is a cylindrical structure with open ends and an internal cavity. One end of the N positioning rods is arranged in a circular array at one end of the pipe sleeve opening, and the other ends of the N positioning rods are connected, with the intersection point located on the axis of the pipe sleeve. The other end of the pipe sleeve is used to fit onto the pre-embedded pipe sleeve. The suspension rod is connected to the other end of the N positioning rods. This utility model ensures that the pipe sleeve does not deviate and that the pipe sleeve elevation does not deviate. After the pre-embedded pipe sleeve is installed, it is centered, thus ensuring a high-quality project from the first attempt and avoiding rework and resource waste. However, the axis of this positioning device is located outside the pipe, making it unsuitable for thick, irregularly shaped components or obliquely crossing structural components. Summary of the Invention

[0008] To address the aforementioned problems, this invention aims to provide a device for precise positioning of pre-embedded sleeves and its construction method.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a pre-embedded sleeve precision positioning device, two cross positioning frames connected by a central screw, a telescopic rod temporary locking device and a target connected to both ends and both end faces of the central screw;

[0010] The cross positioning frame includes a spatial six-way connector. Standard sections are inserted into the spatial six-way connector in four directions (up, down, left, and right) to form a cross shape. A tapered screw is fitted at the other end of the standard section. The axis of the cross positioning frame coincides with the central axis of the pre-embedded sleeve.

[0011] The temporary locking device includes telescopic rods, with two pairs of telescopic rods forming a V-shape. Round steel bars are connected at the openings of the V-shapes, and the two round steel bars are parallel to each other.

[0012] Furthermore, the telescopic rod includes a bushing and an adjusting rod inserted inside the bushing. The bushing is a T-shaped integrated pipe structure. The bushing and the adjusting rod are connected by a foot screw and their lengths can be adjusted.

[0013] Furthermore, the lead screw is a cylinder with round holes on both ends, the outer end face of the cylinder is threaded, and both ends are smooth. The lead screw passes through the front and rear ends of the six-way space of the cross positioning frame.

[0014] Furthermore, the target is a disc marked with a center, and a screw is integrally connected to the other end face of the disc without a center mark. The screw is inserted into a circular hole opened on the end face of the lead screw.

[0015] Furthermore, one end of the bushing is fitted onto the smooth part of the lead screw facing outwards.

[0016] Furthermore, the standard sections of the cross positioning frame are aligned front and rear, and a central screw is inserted between the standard sections to connect them into one piece. The number of standard sections and the extension length of the conical screw are adjusted according to different pipe diameters.

[0017] A construction method using a pre-embedded sleeve precision positioning device includes the following steps:

[0018] Step 1: Determine the axis of the embedded sleeve, install the cross positioning frame inside the embedded sleeve, press the conical screws against the pipe wall, and ensure that the length of the conical screws in all directions is consistent. The axis of the cross positioning frame is the axis of the embedded sleeve.

[0019] Step 2: Temporarily suspend and fix the pre-embedded sleeve, install temporary locking devices at both ends of the cross positioning frame, build the positioning frame assembly and install the round steel on it;

[0020] Step 3: Positioning and temporary fixing of the pre-embedded sleeve. Adjust the length of the telescopic rod according to the offset of the target relative to the axis to realize the horizontal and vertical movement of the pre-embedded sleeve. When the target center on one side is located on the axis of the pre-embedded sleeve, tighten the foot screw on this side. Then, use the same method to lay out the other end face.

[0021] Step 4: Positioning and reinforcement of the pre-embedded sleeve. After determining the position of the pre-embedded sleeve, maintain the temporary locking of the telescopic rod temporary locking device and install the limiting and fixing steel bars.

[0022] Step 5: Inspection of the pre-embedded sleeve. After the positioning and reinforcement are completed, loosen the temporary lock of the telescopic rod temporary locking device, check the positioning and reinforcement effect of the pre-embedded sleeve, and re-measure the position of the pre-embedded sleeve. If there is no error, remove the positioning device and use sealing material to seal both ends of the sleeve.

[0023] Furthermore, by increasing or decreasing the number of standard sections in the four directions (up, down, left, and right) and adjusting the length of the cone screw, different pipe diameters can be accommodated. By increasing the number of standard sections between the two cross-shaped positioning frames, different lengths of sleeves can be accommodated.

[0024] Furthermore, in step 1, when the number of exposed threads on the screw rods of each direction is the same, it means that the lengths of the telescopic rods in the four directions are consistent.

[0025] Furthermore, in step 4, for steel pre-embedded sleeves, the limiting steel bars are welded to the sleeves, while sleeves of other materials are reliably fixed by binding them to the limiting steel bars.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. Accurate layout of planar position and axis direction. The problem of inaccurate measurement and positioning of the center axis and planar position of the pre-embedded sleeve is solved by constraining the central axis of the sleeve with a cross positioning frame and a target.

[0028] 2. During construction, the pre-embedded sleeve exhibits strong anti-interference capabilities and stable, reliable positioning. The use of a temporary locking device effectively prevents disturbance to the pre-embedded sleeve due to collisions and welding temperature stress. This enhances the anti-interference ability of the pre-embedded sleeve, ensuring that it does not shift or misalign during the installation of the limiting and fixing reinforcement and the vibration of concrete pouring.

[0029] 3. It has significant advantages in the precise positioning of pre-embedded sleeves when they pass through large or irregular structural components. It uses two circles to uniquely determine the axis of the pre-embedded sleeve being measured, and reliably limits and fixes it, effectively improving its anti-interference ability. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1This is a schematic diagram of the pre-embedded sleeve positioning device in this invention;

[0032] Figure 2 This is a schematic diagram of the temporary locking device in this invention;

[0033] Figure 3 This is a schematic diagram of the cross-shaped positioning frame in this invention;

[0034] Figure 4 for Figure 3 Exploded view;

[0035] Figure 5 This is a schematic diagram of the cross-shaped positioning frame installed inside the sleeve in this invention;

[0036] Figure 6 This is a schematic diagram of the round steel bar tied to the reinforcing steel frame in this invention;

[0037] Figure 7 This is a schematic diagram of the sleeve fixing and sealing in this invention;

[0038] In the diagram, 1-cross positioning frame; 2-temporary locking device; 3-six-way valve; 4-standard section; 5-embedded sleeve; 6-telescopic rod; 7-round steel; 8-foot screw; 9-target; 10-conical screw; 11-screw rod; 61-shaft sleeve; 62-adjusting rod. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0040] Reference Figure 1 A precision positioning device for pre-embedded sleeves includes two cross-shaped positioning frames 1 connected by a central lead screw 11, a temporary locking device 2 for telescopic rods connected to both ends and both end faces of the central lead screw 11, and a target 9; (Refer to...) Figure 3 and Figure 4 The cross-shaped positioning bracket 1 includes a six-way connector 3, into which standard sections 4 are inserted in four directions (up, down, left, and right) to form a cross shape. A tapered screw 10 is fitted to the other end of each standard section 4. The axis of the cross-shaped positioning bracket 1 coincides with the central axis of the pre-embedded sleeve 5. The temporary locking device 2 includes telescopic rods 6, with two pairs of telescopic rods 6 forming a V-shape. Round steel bars 7 are connected at the openings of the V-shapes, and the two round steel bars 7 are parallel. (Refer to...) Figure 2 The telescopic rod 6 includes a bushing 61 and an adjusting rod 62 inserted inside the bushing 61. The bushing 61 is a T-shaped integrated pipe structure. The bushing 61 and the adjusting rod 62 are connected by a foot screw 8 and their lengths can be adjusted.

[0041] The lead screw 11 is a cylinder with round holes at both ends. The outer end face of the cylinder has a thread, while both ends are smooth. The lead screw 11 passes through the front and rear ends of the six-way connector 3 in the cross-shaped positioning bracket 1. The target 9 is a disc marked with a center. A screw is integrally connected to the other end face of the disc without a center mark. The screw is inserted into the round hole on the end face of the lead screw 11. One end of the bushing 61 is fitted onto the smooth outer end of the lead screw 11. The standard sections 4 of the cross-shaped positioning bracket 1 are aligned front and rear. The lead screw 11 is inserted between the standard sections 4 and connected as a single unit. The number of standard sections 4 and the extension length of the tapered screw 10 are adjusted according to different pipe diameters.

[0042] The principle of this method is to utilize the results of pipework detailing to extract the coordinates of the center points of both ends of the embedded sleeve, use a "cross-shaped positioning frame" to determine the center axis of the embedded sleeve, use a "telescopic rod temporary locking device" to temporarily suspend and fix the embedded sleeve, use a telescopic adjusting rod to continuously and accurately adjust the position of the embedded sleeve, and complete the measurement and positioning of the embedded sleeve; use the "telescopic rod temporary locking device" to temporarily lock the embedded sleeve, install limiting and fixing steel bars to reliably fix the embedded sleeve, and then proceed with subsequent concrete pouring construction. (Refer to...) Figures 5-7 The construction steps are as follows:

[0043] 1. Based on the relevant technical parameters determined by the pipeline integration detailing, including the location, inner diameter, outer diameter, wall thickness, material, and waterproofing requirements of the pre-embedded sleeves, coordinate parameters are extracted and materials are prepared.

[0044] 2. Install the cross-shaped positioning bracket 1 to determine the sleeve axis. Different pipe diameters can be accommodated by increasing or decreasing the number of standard sections 4 in the four directions and adjusting the length of the conical screws 10. Different sleeve lengths can be accommodated by increasing the number of standard sections 4 between two cross-shaped positioning brackets 1. Install the cross-shaped positioning bracket 1 inside the sleeve, ensuring the tip of the conical screw 10 presses firmly against the pipe wall. When the number of exposed threads on each screw is consistent, it indicates that the lengths of the telescopic rods in the four directions are consistent, and the axis of the cross-shaped positioning bracket 1 is the sleeve axis.

[0045] 3. Temporary suspension and fixation of the embedded sleeve: Install telescopic rods 6 at both ends of the cross positioning frame 1, use two round steel bars 7 to pass through the round holes at the other end of the telescopic rods 6, and tie the round steel bars 7 to the steel reinforcement skeleton to complete the installation of the telescopic rod temporary locking device 2, and realize the temporary suspension and fixation of the embedded sleeve.

[0046] 4. Measurement and Positioning of the Embedded Sleeve. A target is installed at the end of the axis of the cross-shaped positioning frame 1, serving as a feature point for measurement and layout. Based on the offset of the target relative to the axis, the length of the telescopic rod 6 is adjusted to allow the sleeve to move horizontally and vertically. When the target center on one side is located on the sleeve axis, the foot screw 8 of the telescopic adjuster on that side is tightened. Then, the same method is used to lay out the other end face. This achieves the measurement, positioning, and temporary fixing of the embedded sleeve.

[0047] 5. Positioning and reinforcement of the pre-embedded sleeve 6: After determining the position of the sleeve, maintain the temporary locking of the telescopic rod temporary locking device 2, and install the limiting and fixing steel bars. For steel pre-embedded sleeves, the limiting steel bars are commonly welded to the sleeve. For sleeves of other materials, they are reliably fixed by binding with the limiting steel bars to ensure that they will not shift or deviate during the concrete pouring process.

[0048] 6. Inspection of the pre-embedded sleeve 6: After the positioning and reinforcement are completed, loosen the temporary locking device 2 of the telescopic rod and check the positioning and reinforcement effect of the sleeve. At the same time, re-measure the position of the sleeve. If there is no error, remove the temporary locking device 2 of the telescopic rod and the cross positioning device 1, and use sealing material to seal both ends of the sleeve.

[0049] 7. Embedded sleeve 6. Concealed acceptance and concrete construction: After the embedded sleeve is installed, a comprehensive on-site inspection is carried out. After confirming that all indicators meet the design specifications, the formwork is closed and subsequent concrete pouring is carried out.

[0050] Using this pre-embedded sleeve positioning device and construction method, precise measurement and positioning of the pre-embedded sleeve can be achieved; reliable reinforcement can be provided, effectively preventing disturbance to it in subsequent processes; and the quality of surrounding concrete pouring can be guaranteed. It effectively avoids problems such as rework, plugging holes, re-drilling holes, and water leakage, greatly improving construction quality and efficiency, and effectively reducing construction costs.

[0051] Using this pre-embedded sleeve positioning device and construction method ensures accurate layout of the plane position and axial direction. By constraining the five degrees of freedom of the sleeve's central axis (X, Y, Z, around X, and around Z) through the three-dimensional coordinates of the two centers, the plane position and axial direction of the sleeve can be uniquely and accurately determined, thus solving the problem of inaccurate measurement and positioning of the central axis and plane position of the pre-embedded sleeve.

[0052] Using this pre-embedded sleeve positioning device and construction method, the pre-embedded sleeve exhibits strong anti-interference capabilities and stable, reliable positioning during construction. The independently developed device enables precise positioning and temporary, reliable fixing, effectively preventing disturbance to the pre-embedded sleeve caused by collisions and welding temperature stress. This enhances the anti-interference ability of the pre-embedded sleeve, ensuring that it does not shift or misalign during the installation of the limiting and fixing reinforcement bars and the vibration of concrete pouring.

[0053] This pre-embedded sleeve positioning device and construction method offers significant advantages in the precise positioning of pre-embedded sleeves when they pass through large or irregularly shaped structural components. Traditional construction methods struggle to guarantee accuracy and suffer from significant interference when pre-embedded sleeves pass through irregularly shaped, curved, or thick components, or intersect structural components at an angle. This method uniquely determines the axis of the pre-embedded sleeve using two circular centers, ensuring reliable positioning and effectively improving its anti-interference capabilities.

[0054] The above provides a detailed description of the pre-embedded sleeve precise positioning device and its construction method provided by the present invention. Specific examples have been used to illustrate the structure and working principle of the invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for precise positioning of pre-embedded sleeves, characterized in that: It includes two cross-shaped positioning frames (1) connected by a central screw (11), a telescopic rod temporary locking device (2) connected to both ends and both end faces of the central screw (11), and a target (9). The cross positioning frame (1) includes a space six-way (3), and standard sections (4) are inserted into the space six-way (3) in the four directions of up, down, left and right to form a cross shape. A tapered screw (10) is installed at the other end of the standard section (4). The axis of the cross positioning frame (1) coincides with the central axis of the pre-embedded sleeve (5). The temporary locking device (2) includes telescopic rods (6), two pairs of telescopic rods (6) are V-shaped, and round steel (7) is provided at the opening of the V-shape to connect them. The two round steel (7) are parallel. The telescopic rod (6) includes a bushing (61) and an adjusting rod (62) inserted in the bushing (61). The bushing (61) is a T-shaped pipe integrated structure. The bushing (61) and the adjusting rod (62) are connected by a foot screw (8) and can adjust the length. The core screw (11) is a cylinder with round holes on both ends. The outer end face of the cylinder is threaded and the two ends are smooth. The core screw (11) passes through the front and rear ends of the cross positioning frame (1) and the six-way connector (3). The target (9) is a disc marked with a center. The other end of the disc without a center mark is integrally connected with a screw, which is inserted into a circular hole on the end face of the lead screw (11).

2. The precise positioning device for pre-embedded sleeves according to claim 1, characterized in that: One end of the bushing (61) is fitted onto the smooth part of the outer end of the lead screw (11).

3. The precise positioning device for pre-embedded sleeves according to claim 1, characterized in that: The standard sections (4) of the cross positioning frame (1) are aligned front and back, and the spindle screw (11) is inserted between the standard sections (4) to connect them into one piece. The number of standard sections (4) and the extension length of the cone screw (10) are adjusted according to different pipe diameters.

4. A method for construction using the pre-embedded sleeve precision positioning device according to any one of claims 1-3, characterized in that: Includes the following steps, Step 1: Determine the axis of the pre-embedded sleeve (5), install the cross positioning frame (1) inside the pre-embedded sleeve (5), press the conical screw (10) against the pipe wall, and ensure that the length of the conical screw (10) in each direction is consistent. The axis of the cross positioning frame (1) is the axis of the pre-embedded sleeve (5). Step 2: The pre-embedded sleeve (5) is temporarily suspended and fixed, and temporary locking devices (2) are installed at both ends of the cross positioning frame (1). The positioning frame assembly is built and the round steel (7) is installed on it; Step 3: Positioning and temporary fixing of the pre-embedded sleeve (5). Based on the offset of the target (9) relative to the axis, adjust the length of the telescopic rod (6) to realize the horizontal and vertical movement of the pre-embedded sleeve (5). When the target center on one side is located on the axis of the pre-embedded sleeve (5), tighten the foot screw (8) on this side. Then, use the same method to lay out the other end face. Step 4: Positioning and reinforcement of the pre-embedded sleeve (5). After determining the position of the pre-embedded sleeve (5), maintain the temporary locking of the telescopic rod temporary locking device (2) and install the limiting and fixing steel bars. Step 5: Inspection of the pre-embedded sleeve (5). After the positioning and reinforcement are completed, loosen the temporary locking device (2) of the telescopic rod and check the positioning and reinforcement effect of the pre-embedded sleeve (5). At the same time, re-measure the position of the pre-embedded sleeve (5). After confirming that there are no errors, remove the positioning device and use sealing material to seal both ends of the sleeve.

5. The method for constructing the pre-embedded sleeve precision positioning device according to claim 4, characterized in that: Different pipe diameters can be accommodated by increasing or decreasing the number of standard sections (4) in the four directions (up, down, left, and right) and adjusting the length of the cone screw (10). Different length sleeves can be accommodated by increasing the number of standard sections (4) between the two cross positioning frames.

6. The method for constructing the pre-embedded sleeve precision positioning device according to claim 4, characterized in that: In step 1, when the number of exposed threads on the screw of each conical head screw (10) is consistent, it means that the length of the telescopic rod in the four directions is consistent.

7. The method for constructing the pre-embedded sleeve precision positioning device according to claim 4, characterized in that: In step 4, for steel pre-embedded sleeves, the limiting steel bars are welded to the sleeves, while sleeves of other materials are reliably fixed by binding them to the limiting steel bars.

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