Pre-embedded sleeve accurate positioning device and construction method thereof

Abstract

The invention discloses a precise positioning device for an embedded sleeve and a construction method of the precise positioning device. The precise positioning device comprises two cross-shaped positioning frames connected through an axis lead screw, telescopic rod temporary locking devices connected to the two ends and the two end faces of the axis lead screw and a target. The cross-shaped positioning frame comprises a spatial six-way joint, standard knots are sleeved in the upper, lower, left and right directions of the spatial six-way joint to form a cross shape, the other ends of the standard knots are sleeved with conical head screws, and the axis of the cross-shaped positioning frame coincides with the central axis of the embedded sleeve; the temporary locking device comprises two pairs of telescopic rods, the two pairs of telescopic rods are in a V shape, round steel bars are arranged at openings of the V shapes respectively for connection, and the two round steel bars are parallel. By using the embedded sleeve positioning device and the construction method, the measurement and positioning of the embedded sleeve can be accurately carried out; reliable reinforcement is achieved, and disturbance caused by subsequent procedures is effectively avoided; and the surrounding concrete pouring quality is ensured. The problems of later reworking, hole blocking, hole reopening, water leakage and the like are effectively avoided, the construction quality and efficiency are greatly improved, and the construction cost is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of embedded casings, and in particular relates to a precise positioning device for embedded casings and a construction method thereof. Background Art

[0002] When pipes and cables pass through walls and floors, it is necessary to install embedded casings to provide protection and support for the pipes; for structures with waterproofing requirements, embedded casings are used to ensure the waterproofing effect of the nodes. At present, when installing embedded casings on site, there is a lack of precise positioning methods and supporting devices, which can easily lead to the following quality problems:

[0003] 1. The deviation of the casing position causes the pipes and cables to bend and twist, which affects the appearance quality, leads to insufficient installation space, the net height does not meet the requirements, and even causes the whole route to be reworked;

[0004] 2. The inaccurate axial direction of the reserved casing causes 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, when installing the limited fixed steel bars, in order to avoid disturbing the position of the embedded sleeve, spot welding or simple binding is often used on site, which can easily cause unreliable fixation of the embedded sleeve;

[0006] 4. The embedded casing is not fixed reliably and the surrounding concrete cannot be fully vibrated, resulting in the local bearing capacity of the structural concrete and the waterproofing of the nodes not meeting the design specification requirements.

[0007] The Chinese utility model patent with the publication number CN220686753U discloses a precise positioning device for pre-buried water and electricity casing; it includes a casing, N positioning rods, and a hanging wire rod, N≥3; the casing is a cylindrical structure with two ends open and a cavity inside; one end of the N positioning rods is distributed in a circular array at the opening at one end of the casing, and the other ends of the N positioning rods are connected, and the intersection of the connection is located at the axis of the casing; the other end of the casing is used to be sleeved on the pre-buried water and electricity casing; the hanging wire rod is connected to the connection point of the other ends of the N positioning rods; the utility model ensures that the casing is not offset, and can ensure that the casing elevation will not deviate, and the pre-buried water and electricity casing can be centered after the construction is completed, so as to ensure that the project is excellent at one time and avoid waste of resources caused by rework in the later stage. The axis of the positioning device is set outside the pipeline, which is not applicable to thick and large, special-shaped components or oblique crossing structural components. Summary of the invention

[0008] In order to solve the above problems, the present invention aims to provide a pre-buried casing precise positioning device and a construction method thereof.

[0009] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a device for accurately positioning a pre-buried casing, two cross positioning frames connected by an axial screw rod, a temporary locking device and a target of a telescopic rod connected to both ends and both end surfaces of the axial screw rod;

[0010] The cross positioning frame includes a space six-way, and standard sections are inserted into the space six-way in four directions of up, down, left, and right to form a cross shape. A cone head screw is installed at the other end of the standard section, and the axis of the cross positioning frame coincides with the central axis of the embedded sleeve;

[0011] The temporary locking device comprises telescopic rods, two pairs of telescopic rods are V-shaped, and round steel connections are respectively arranged at the V-shaped openings, and the two round steels are parallel.

[0012] Furthermore, the telescopic rod includes a shaft sleeve and an adjusting rod inserted in the shaft sleeve, the shaft sleeve is a T-shaped pipe integrated structure, the shaft sleeve and the adjusting rod are connected by a foot screw and can adjust the length.

[0013] Furthermore, the axial screw rod is a cylinder with round holes on both end faces, a thread is arranged on the middle outer end face of the cylinder, and both ends are smooth, and the axial screw rod passes through the front and rear ends of the six-way space of the cross positioning frame.

[0014] Furthermore, the target is a disc with a center marked on it, and the other end surface of the disc without a center marked on it is integrally connected with a screw, and the screw is inserted into a circular hole opened on the end surface of the axial screw rod.

[0015] Furthermore, one end of the shaft sleeve is sleeved on a smooth portion of the shaft screw rod facing the outer end.

[0016] Furthermore, the front and rear standard sections between the cross positioning frames are aligned, and the axial screw rods are inserted between the standard sections to connect them as a whole. The number of standard sections and the protruding length of the cone head screws are adjusted according to different pipe diameters.

[0017] A method for construction using a pre-buried casing precise positioning device comprises the following steps:

[0018] Step 1: Determine the axis of the embedded casing, install the cross positioning frame in the embedded casing, make the cone head screws press the pipe wall, ensure the cone head screws are of the same length in all directions, and the axis of the cross positioning frame is the axis of the embedded casing;

[0019] Step 2: Temporarily hang and fix the embedded casing, install temporary locking devices at both ends of the cross positioning frame, build the positioning frame group and install the round steel on it;

[0020] Step 3: Position and temporarily fix the embedded casing. According to the offset of the target relative to the axis, adjust the length of the telescopic rod to achieve the up and down and left and right translation of the embedded casing. When the center of the target on one side is on the axis of the embedded casing, tighten the foot screw on this side, and then use the same method to set out the other end face.

[0021] Step 4: Positioning and reinforcement of the embedded casing. After determining the position of the embedded casing, keep the temporary locking device of the telescopic rod temporarily locked and install the limit fixing steel bar;

[0022] Step 5: Check the embedded casing. After the positioning and reinforcement are completed, release the temporary locking device of the telescopic rod to check the positioning and reinforcement effect of the embedded casing. At the same time, re-measure the position of the embedded casing. After it is correct, remove the positioning device and use sealing materials to seal the two end faces of the casing.

[0023] Furthermore, the applicability of different pipe diameters can be achieved by increasing or decreasing the number of standard sections in the four directions of up, down, left and right and adjusting the length of the cone head screw. The applicability of different lengths of sleeves can be achieved by increasing the number of standard sections between two cross positioning frames.

[0024] Furthermore, in step 1, when the number of exposed threads of the cone-head screws in 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 the embedded steel casing, the limiting steel bars are welded to the casing, and casings made of other materials are reliably fixed by binding with the limiting steel bars.

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

[0027] 1. The plane position and axis direction are accurately laid out, and the problem of inaccurate measurement and positioning of the center axis and plane position of the embedded casing is solved by constraining the center axis of the casing with a cross positioning frame and a target.

[0028] 2. During construction, the embedded casing has strong anti-interference ability and stable and reliable position. The temporary locking device is used to effectively avoid the disturbance of collision and welding temperature stress on the embedded casing. The anti-interference ability of the embedded casing is improved, ensuring that the embedded casing will not deviate or misalign during the installation of limited fixed steel bars and the concrete pouring and vibration process.

[0029] 3. It has significant advantages in the precise positioning of embedded casing when it passes through large or special-shaped structural components. It uses two circle centers to uniquely determine the axis of the embedded casing, which can be reliably limited and fixed, effectively improving the anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1It is a schematic diagram of the embedded casing positioning device in the present invention;

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

[0033] Figure 3 It is a schematic diagram of the cross positioning frame in the present invention;

[0034] Figure 4 for Figure 3 Exploded diagram of

[0035] Figure 5 This is a schematic diagram of the cross positioning frame of the present invention being installed in the sleeve;

[0036] Figure 6 It is a schematic diagram of the round steel being tied to the steel bar skeleton in the present invention;

[0037] Figure 7 It is a schematic diagram of the fixing and plugging of the casing in the present invention;

[0038] In the figure, 1-cross positioning frame; 2-temporary locking device; 3-space six-way; 4-standard section; 5-embedded casing; 6-telescopic rod; 7-round steel; 8-foot screw; 9-target; 10-cone head screw; 11-axial screw rod; 61-sleeve; 62-adjusting rod. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0040] Reference Figure 1 , a device for accurately positioning a pre-buried casing, two cross positioning frames 1 connected by an axial screw rod 11, a telescopic rod temporary locking device 2 and a target 9 connected to both ends and both end surfaces of the axial screw rod 11; Figure 3 and Figure 4 The cross positioning frame 1 includes a space six-way 3, and a standard section 4 is inserted into the space six-way 3 in four directions to form a cross shape. A cone head 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 embedded sleeve 5; the temporary locking device 2 includes a telescopic rod 6, and two pairs of telescopic rods 6 are V-shaped. Round steels 7 are respectively provided at the V-shaped openings for connection, and the two round steels 7 are parallel. Figure 2 The telescopic rod 6 includes a sleeve 61 and an adjusting rod 62 inserted in the sleeve 61. The sleeve 61 is a T-shaped pipeline integrated structure. The sleeve 61 and the adjusting rod 62 are connected by a foot screw 8 and can adjust the length.

[0041] The shaft screw 11 is a cylinder with round holes on both end faces, and the middle outer end face of the cylinder is provided with threads, and the two ends are smooth. The shaft screw 11 passes through the front and rear ends of the six-way space 3 of the cross positioning frame 1. The target 9 is a disk with a center marked on it, and the other end face of the disk without a center marked on it is integrally connected with a screw, and the screw is inserted into the round hole opened on the end face of the shaft screw 11. One end of the sleeve 61 is inserted into the smooth part of the shaft screw 11 facing the outer end. The standard sections 4 before and after the cross positioning frame 1 are aligned, and the shaft screw 11 is inserted between the standard sections 4 to connect them as a whole. The number of standard sections 4 and the extension length of the cone head screw 10 are adjusted according to different pipe diameters.

[0042] The principle of this method is to use the results of pipe deepening to extract the coordinates of the center points of the two end faces of the embedded casing, use the "cross positioning frame" to determine the central axis of the embedded casing, use the "telescopic rod temporary locking device" to achieve temporary suspension and fixation of the embedded casing, use the telescopic adjustment rod to continuously and accurately adjust the position of the embedded casing, and complete the measurement and positioning of the embedded casing; use the "telescopic rod temporary locking device" to achieve temporary locking of the embedded casing, install limit fixing steel bars, achieve reliable fixation of the embedded casing, and carry out subsequent concrete pouring construction. Refer to Figure 5-Figure 7 , the construction steps are as follows:

[0043] 1. Based on the relevant technical parameters determined by the pipe deepening, including the position, inner diameter, outer diameter, wall thickness, material, and waterproof requirements of the embedded casing, coordinate parameter extraction and material preparation are carried out.

[0044] 2. Install the cross positioning frame 1 and determine the axis of the casing. By increasing or decreasing the number of standard sections 4 in the four directions and adjusting the length of the cone head screw 10, the application of different pipe diameters can be achieved. By increasing the number of standard sections 4 between two cross positioning frames 1, the application of casings of different lengths can be achieved. Install the cross positioning frame 1 in the casing so that the tip of the cone head screw 10 presses the pipe wall. When the number of threads exposed in each direction is the same, it means that the length of the telescopic rod in the four directions is consistent, and the axis of the cross positioning frame 1 is the axis of the casing.

[0045] 3. The buried casing is temporarily suspended and fixed. The telescopic rod 6 is installed at both ends of the cross positioning frame 1. Two round steels 7 are passed through the round holes at the other end of the telescopic rod 6, and the round steels 7 are tied to the steel frame to complete the installation of the temporary locking device 2 of the telescopic rod, so as to realize the temporary suspension and fixation of the embedded casing.

[0046] 4. Measurement and positioning of embedded casing. Install a target at the end of the axis of the cross positioning frame 1, which is used as a characteristic point for measurement and layout. According to the offset of the target relative to the axis, adjust the length of the telescopic rod 6 to achieve the translation of the casing up and down and left and right. When the center of the target on one side is on the axis of the casing, tighten the foot screw 8 of the telescopic adjuster on this side, and then use the same method to layout the other end face. In this way, the measurement, positioning and temporary fixation of the embedded casing are achieved.

[0047] 5. Positioning and reinforcement of the embedded sleeve 6. After determining the position of the sleeve, keep the temporary locking device 2 of the telescopic rod temporarily locked, and install the limiting fixing steel bars. For steel embedded sleeves, it is common to weld the limiting steel bars to the sleeve. For sleeves made of other materials, they are reliably fixed by tying them with the limiting steel bars to ensure that they will not shift or deflect during the concrete pouring process.

[0048] 6. Inspection of the embedded casing 6. After the positioning and reinforcement are completed, release the temporary locking of the telescopic rod temporary locking device 2, check the positioning and reinforcement effect of the casing, and re-measure the casing position. After confirming that there is no error, remove the telescopic rod temporary locking device 2 and the cross positioning device 1, and use sealing materials to seal the two end faces of the casing.

[0049] 7. Concealed acceptance and concrete construction of embedded casing 6. After the embedded casing is installed, a comprehensive on-site inspection is carried out to confirm that all indicators meet the requirements of the design specifications before the formwork is closed and subsequent concrete pouring is carried out.

[0050] The embedded casing positioning device and construction method can accurately measure and locate the embedded casing, reliably reinforce it, effectively avoid disturbances in subsequent processes, and ensure the quality of surrounding concrete pouring. It can effectively avoid problems such as rework, plugging holes, re-drilling holes, and water leakage, greatly improve construction quality and efficiency, and effectively reduce construction costs.

[0051] The use of this embedded casing positioning device and construction method allows accurate layout of the plane position and axis direction, and the five degrees of freedom of X, Y, Z, around X, and around Z of the center axis of the casing are constrained by the three-dimensional coordinates of the two center points, thereby uniquely and accurately determining the plane position and axis direction of the casing, solving the problem of inaccurate measurement and positioning of the center axis and plane position of the embedded casing.

[0052] By using this embedded casing positioning device and construction method, the embedded casing has strong anti-interference ability and stable and reliable position during construction. During the construction process, the self-developed device is used for precise positioning and temporary reliable fixation, effectively avoiding the disturbance of the embedded casing by collision and welding temperature stress. The anti-interference ability of the embedded casing is improved, ensuring that the embedded casing will not deviate or be misplaced during the installation of the limited fixed steel bars and the concrete pouring and vibration.

[0053] The use of this embedded casing positioning device and construction method has significant advantages in the precise positioning of the embedded casing when it passes through large or special-shaped structural components. When the embedded casing passes through special-shaped, curved, thick and large components or intersects with structural components obliquely, the traditional construction accuracy is difficult to guarantee and there is a lot of interference during the construction process. This method uses two circle centers to uniquely determine the axis of the embedded casing to be measured, which can be reliably limited and fixed, and effectively improve the anti-interference ability.

[0054] The above is a detailed introduction to a pre-buried casing precise positioning device and a construction method thereof provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for accurately positioning a pre-buried casing, characterized in that: It comprises two cross positioning frames (1) connected by an axial screw rod (11), a telescopic rod temporary locking device (2) and a target (9) connected to the two ends and two end surfaces of the axial screw rod (11); The cross positioning frame (1) comprises a space six-way (3), a standard section (4) is inserted into the space six-way (3) in four directions of up, down, left and right to form a cross shape, a cone head screw (10) is installed at the other end of the standard section (4), and the axis of the cross positioning frame (1) coincides with the central axis of the embedded sleeve (5); The temporary locking device (2) comprises telescopic rods (6), two pairs of telescopic rods (6) are V-shaped, and round steel bars (7) are respectively provided at the V-shaped openings for connection, and the two round steel bars (7) are parallel.

2. The embedded casing precise positioning device according to claim 1, characterized in that: The telescopic rod (6) comprises a shaft sleeve (61) and an adjusting rod (62) inserted into the shaft sleeve (61); the shaft sleeve (61) is a T-shaped pipe integrated structure; the shaft sleeve (61) and the adjusting rod (62) are connected via a foot screw (8) and can adjust the length.

3. The embedded casing precise positioning device according to claim 1, characterized in that: The axial screw rod (11) is a cylinder with round holes on both end faces, a thread is provided on the middle outer end face of the cylinder, and both ends are smooth. The axial screw rod (11) passes through the front and rear ends of the six-way space (3) of the cross positioning frame (1).

4. The embedded casing precise positioning device according to claim 1, characterized in that: The target (9) is a disk with a center marked on it, and the other end surface of the disk without a center marked on it is integrally connected with a screw, which is inserted into a circular hole formed on the end surface of the axial screw rod (11).

5. The embedded casing precise positioning device according to claim 2, characterized in that: One end of the shaft sleeve (61) is sleeved on the smooth portion of the shaft screw rod (11) facing the outer end.

6. The embedded casing precise positioning device according to claim 1, characterized in that: The front and rear standard sections (4) between the cross positioning frames (1) are aligned, and an axial screw rod (11) is inserted between the standard sections (4) to connect them as one. The number of standard sections (4) and the extended length of the cone head screw (10) are adjusted according to different pipe diameters.

7. A construction method using the embedded casing precise positioning device according to any one of claims 1 to 6, characterized in that: The following steps are included: Step 1: Determine the axis of the embedded sleeve (5), install the cross positioning frame (1) in the embedded sleeve (5), make the cone head screw (10) press the pipe wall, ensure that the length of the cone head screw (10) in each direction is consistent, and the axis of the cross positioning frame (1) is the axis of the embedded sleeve (5); Step 2: The embedded casing (5) is temporarily suspended and fixed, temporary locking devices (2) are installed at both ends of the cross positioning frame (1), and a positioning frame assembly is constructed and the round steel (7) is installed thereon; Step 3: The embedded sleeve (5) is positioned and temporarily fixed. According to the offset of the target (9) relative to the axis, the length of the telescopic rod (6) is adjusted to achieve the up and down and left and right translation of the embedded sleeve (5). When the center of the target on one side is located on the axis of the embedded sleeve (5), the foot screw (8) on this side is tightened, and then the other end face is set out using the same method; Step 4: Positioning and reinforcing the embedded sleeve (5). After determining the position of the embedded sleeve (5), keep the temporary locking of the telescopic rod temporary locking device (2) and install the limit fixing steel bar; Step 5: Check the embedded sleeve (5). After the positioning and reinforcement are completed, release the temporary locking of the telescopic rod temporary locking device (2) to check the positioning and reinforcement effect of the embedded sleeve (5). At the same time, re-measure the position of the embedded sleeve (5). After it is correct, remove the positioning device and use sealing materials to seal the two end faces of the sleeve.

8. The construction method using the embedded casing precise positioning device according to claim 7 is characterized in that: By increasing or decreasing the number of standard sections (4) in the four directions of up, down, left, and right and adjusting the length of the cone head screw (10), the application of different pipe diameters can be achieved. By increasing the number of standard sections (4) between two cross positioning frames, the application of sleeves of different lengths can be achieved.

9. The construction method using the embedded casing precise positioning device according to claim 7, characterized in that: In step 1, when the number of exposed threads of the screw rods of the cone head screws (10) in each direction is the same, it means that the lengths of the telescopic rods in the four directions are consistent.

10. The construction method using the embedded casing precise positioning device according to claim 7, characterized in that: In step 4, for the steel embedded casing, the limiting steel bars are welded to the casing, and casings made of other materials are reliably fixed by binding with the limiting steel bars.

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