A construction method for positioning precast slab sleeves in mechanical and electrical pipe wells

Abstract

The present invention relates to a positioning construction device for precast slab sleeves of an electromechanical pipe well, which includes two scale plates. Fixed legs are fixedly installed on the left and right sides of the bottoms of the two scale plates. Chutes are formed on the opposite sides of the two scale plates. A scale cross bar is slidably installed between the two scale plates. A support formwork is placed at the bottom between the two scale plates. An internal support device is arranged at the bottom of the scale cross bar. A support cylinder is fixedly installed on the outer surface of the internal support device inside the support formwork. A sliding sleeve is slidably installed inside the chute. For the positioning construction method of the precast slab sleeve of the electromechanical pipe well, by setting the scale plates and marking the positions of each sleeve, the positioning device of the electromechanical pipe well sleeve can be removed and used for turnover. The device of the present invention has a simple structure, is easy to process and manufacture, is convenient to carry and is easy to promote, and can install the sleeve on the precast slab more firmly.

Description

Technical Field

[0001] The present invention relates to the technical field of electromechanical pipeline installation, and particularly to a construction method for positioning a sleeve of a precast slab in an electromechanical pipe shaft. Background Art

[0002] In the electromechanical installation project of a building, drainage pipes, fire pipes, and air-conditioning water pipes often pass through floors and walls. In order to facilitate the maintenance of the pipes or to prevent the mutual damage between the thermal expansion and contraction of the pipes and the structure, sleeves need to be installed, that is, double-layer pipes are installed in an overlapping manner.

[0003] At present, in most projects, especially in super high-rise projects, in order to ensure the verticality of the pipeline construction in the later stage, the general method for reserving the pipe shaft structure is to reserve holes and then pour the floor slab. When pouring the floor slab of the pipe shaft, it is necessary to accurately position and install the pipeline sleeve; if the installation position of the sleeve is inaccurate, during the pipeline construction, it may cause the verticality of the installation of the pipeline riser not to meet the requirements, thus causing installation quality problems. In addition, the pipeline inside the sleeve may be misaligned (the centers of the two do not coincide), that is, the distance between the inner pipe and the outer pipe is not balanced. On the one hand, it affects the aesthetics of the pipeline. On the other hand, for the air-conditioning pipes and hot water pipes that need to be insulated, being misaligned will result in inconsistent insulation thickness around the pipeline inside the sleeve. The part with a too thin insulation layer will form a cold bridge, and the outer wall of the insulation layer will condense water or even drip water, causing potential safety hazards. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a construction method for positioning a sleeve of a precast slab in an electromechanical pipe shaft, which has the advantages of simple operation and convenient disassembly and assembly. Before the pipeline construction, the sleeve is accurately positioned and then the floor slab is poured, solving the problem of inaccurate positioning of the sleeve in the electromechanical pipe shaft and the problem that the construction of the post-cast floor slab may be difficult due to the narrow space in the pipe shaft after the pipeline construction is completed. Thus, the accurate positioning of multiple sleeves in the pipe shaft is realized, which not only ensures that the verticality of the pipeline installation meets the requirements and avoids the risk of later rectification of the sleeve, but also avoids the difficulty of the later civil engineering for plugging holes, thereby reducing the additional construction cost.

[0005] To achieve the above object, the present invention provides the following technical solution: a positioning construction device for precast slab sleeves in an electromechanical pipe well, including two scale plates. On the left and right sides of the bottoms of the two scale plates, fixed legs are fixedly installed. On the opposite sides of the two scale plates, sliding grooves are opened. A scale crossbar is slidably installed between the two scale plates. A support formwork is placed at the bottom between the two scale plates. An inner support device is arranged at the bottom of the scale crossbar. A support cylinder is fixedly installed on the inner surface of the support formwork and located outside the inner support device. A sliding sleeve is slidably installed in the sliding groove. A pressing plate is movably installed on the back of the sliding sleeve. A support plate is movably installed in the sliding sleeve. A plug shaft is inserted into the front of the support plate. A support spring is fixedly installed at the bottom of the support plate;

[0006] The inner support device includes a base. The base is movably installed inside the support cylinder. On the left and right sides of the base, support legs are movably installed. At the bottom of the support legs, support feet are movably installed. The top of the base is rotatably connected to a support neck. Locking nuts are threadedly connected to the top and bottom of the outer surface of the support neck. On the left and right sides of the top of the support neck, clamping arms are movably installed. Two support clamping rods are movably installed inside the support neck. On the separated sides of the two support clamping rods, limiting springs are fixedly installed. Sliding openings are opened on the front and back of the support neck. A support shaft is movably installed at the bottom between the two support clamping rods. Resistance-increasing blocks are fixedly installed on the inner sides of the two clamping arms. A rotating groove is opened on the inner wall of the upper locking nut.

[0007] Further, scale rulers are printed on the outer surfaces of the scale plates and the scale crossbar. The scale plates are square steel with a size of 50*50mm.

[0008] Further, the scale crossbar is a galvanized steel pipe of DN, and the number of scale crossbars is the same as the number of sleeves to be installed.

[0009] Further, the front and rear ends of the scale crossbar are respectively slidably installed inside the two sliding grooves, and the scale crossbar is fixed above the support formwork through the inner support device.

[0010] Further, the support cylinder is slidably installed on the inner bottom wall of the support formwork, and the support cylinder is located below the corresponding scale crossbar.

[0011] Further, openings are opened on the front and back of the sliding sleeve. The scale crossbar penetrates through the front opening and extends into the inside of the sliding sleeve, and the scale crossbar is located on the top of the support plate.

[0012] Further, the support plate is rotationally installed inside the sliding sleeve through a plug shaft. The support spring is located at the rear side of the bottom of the support plate. The pressing plate is fixedly installed on the back surface of the support plate, and the back surface of the pressing plate penetrates through the rear opening and extends to the rear side of the sliding sleeve.

[0013] Further, the outer surface of the support foot is slidably connected to the inner wall of the support cylinder. The two support clamping rods are arranged in a cross pattern. Plug pins are fixedly installed on the front and back surfaces of the support shaft.

[0014] Further, the plug pin penetrates through the sliding opening and extends into the rotation groove for sliding connection therewith. One end of the limit spring away from the support clamping rod is fixedly connected to the inner wall of the support neck.

[0015] A positioning construction method for precast pipe sleeve in an electromechanical pipe well includes the following steps:

[0016] 1) Place two scale plates on both sides of the support formwork according to the pipe well size, and ensure that the starting points of the two scale plates are on the same horizontal line. After sleeving the inner support device, insert the same number of scale crossbars into the sliding grooves of the scale plates according to the number of pipes.

[0017] 2) The scale plates and scale crossbars are provided with scales. When in use, it can ensure that multiple pipe sleeves can be accurately positioned as required. After the civil engineering has set up the formwork, place the sleeves of corresponding sizes in the pipe well according to the number of pipes. According to the pipe well layout positioning drawing, select the specified scale on the scale plate to determine the accurate positioning of the first sleeve in the X-axis direction, and select the specified scale on the scale crossbar to determine the accurate positioning of the first sleeve in the Y-axis direction.

[0018] 3) After determining the specific positions of the scale crossbar and scale plate of the sleeve, adjust the position of the lock nut above the support neck inside the inner support device, and fix the inner support device on the scale crossbar so that it cannot move freely.

[0019] 4) Adjust the position of the lower lock nut to adjust the angle between the two support legs. After the support foot tightly adheres to the inner wall of the sleeve, lock the position.

[0020] 5) Without affecting the tight adhesion of the pipes, during manufacturing, control the length of the support legs and the width of the support foot to ensure that they can tightly adhere to the inner walls of DN - DN pipes and have sufficient contact area, which is more convenient to operate.

[0021] 6) And so on. According to the pipe well layout positioning drawing, determine the accurate positioning of other sleeves one by one and lock the central positions of the sleeves. After the positioning is completed, mark the positions of each sleeve, then the positioning device for the electromechanical pipe well sleeve can be removed for turnover use.

[0022] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0023] 1. For this construction method for positioning the precast slab casing in the mechanical and electrical pipe shaft, by setting the scale boards, place two scale boards on both sides of the supporting formwork according to the size of the pipe shaft, and ensure that the starting points of the two scale boards are on the same horizontal line. After inserting the same number of scale crossbars into the inner support device according to the number of pipes, snap them into the sliding grooves of the scale boards. Since the scale boards and the scale crossbars are provided with scales, during use, accurate positioning of multiple pipe casings can be ensured as required. After the civil engineering has set up the formwork, place casings of corresponding sizes in the pipe shaft according to the number of pipes. According to the pipe shaft layout positioning drawing, select the specified scale on the scale board to determine the accurate positioning of the first casing in the X-axis direction, and select the specified scale on the scale crossbar to determine the accurate positioning of the first casing in the Y-axis direction. After determining the specific positions of the scale crossbar and the scale board of this casing, adjust the position of the lock nut above the inner support neck inside the inner support device to fix the inner support device on the scale crossbar so that it cannot move freely. Adjust the position of the lower lock nut to adjust the angle between the two support legs, and lock the position after the support sole tightly adheres to the inner wall of the casing. Without affecting the tight fit of the pipes, during manufacturing, control the length of the support legs and the width of the support soles to ensure that they can tightly adhere to the inner walls of DN-DN pipes and have sufficient contact area, making the operation more convenient. And so on, according to the pipe shaft layout positioning drawing, determine the accurate positioning of other casings one by one and lock the center positions of the casings. After the positioning is completed, mark the positions of each casing, then the positioning device for the mechanical and electrical pipe shaft casing can be removed for turnover use. The device of the present utility model has a simple structure, is easy to process and manufacture, is convenient to carry and promote, and can install the casing on the precast slab more firmly.

[0024] 2. For this construction method for positioning the precast slab casing in the mechanical and electrical pipe shaft, by setting the inner support device, when supporting the scale crossbar, clamp the scale crossbar at the top of the support neck through two clamping arms. When clamping, by rotating the upper lock nut, the lock nut rotates on the outer surface of the support neck to achieve lifting. When the lock nut rises, it will drive the support shaft to move upward between the two support clamping rods, thereby expanding the distance between the two support clamping rods. Under the action of the lever principle, the two clamping arms are forced to open outward. Place the scale crossbar between the clamping arms, and then rotate the lock nut downward. Under the action of the limit spring, it resets to clamp and lock the scale crossbar to ensure the support for the scale crossbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a construction method for positioning the precast slab casing in the mechanical and electrical pipe shaft of the present invention;

[0026] Figure 2Schematic diagram of the scale crossbar structure of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0027] Figure 3 Schematic diagram of the support device structure of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0028] Figure 4 Front view cross-sectional view of the support neck of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0029] Figure 5 Schematic diagram of the lock nut structure of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0030] Figure 6 Top view cross-sectional view of the scale crossbar of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0031] Figure 7 Left view cross-sectional view of the sliding sleeve of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0032] Figure 8 Schematic diagram of an embodiment of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention;

[0033] Figure 9 Top view of the pipe sleeve installation of a construction method for positioning the sleeve of a precast slab in an electromechanical pipe well according to the present invention.

[0034] In the figure: 1, scale board; 2, fixed support leg; 3, sliding groove; 4, scale crossbar; 5, support formwork; 6, inner support device; 7, support cylinder; 8, sliding sleeve; 9, pressing plate; 10, support plate; 11, insertion shaft; 12, support spring; 601, base; 602, support leg; 603, support sole; 604, support neck; 605, lock nut; 606, clamping arm; 607, support clamping rod; 608, limit spring; 609, sliding opening; 610, support shaft; 612, resistance increasing block; 613, rotating groove. Specific implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0036] Please refer to Figures 1-9, a mechanical and electrical pipe well precast slab sleeve positioning construction device in this embodiment includes two scale plates 1. Fixed legs 2 are fixedly installed on the left and right sides of the bottoms of the two scale plates 1. Chute grooves 3 are opened on the opposite sides of the two scale plates 1. A scale cross bar 4 is slidably installed between the two scale plates 1. A support formwork 5 is placed at the bottom between the two scale plates 1. An internal support device 6 is arranged at the bottom of the scale cross bar 4. A support cylinder 7 is fixedly installed on the inner surface of the support formwork 5 and located outside the internal support device 6. A sliding sleeve 8 is slidably installed inside the chute groove 3. A pressing plate 9 is movably installed on the back of the sliding sleeve 8. A support plate 10 is movably installed inside the sliding sleeve 8. A plug shaft 11 is inserted into the front of the support plate 10. A support spring 12 is fixedly installed at the bottom of the support plate 10;

[0037] The internal support device 6 includes a base 601. The base 601 is movably installed inside the support cylinder 7. Support legs 602 are movably installed on the left and right sides of the base 601. Support feet 603 are movably installed at the bottoms of the support legs 602. The top of the base 601 is rotatably connected to a support neck 604. Locking nuts 605 are threadedly connected to the top and bottom of the outer surface of the support neck 604. Clamping arms 606 are movably installed on the left and right sides of the top of the support neck 604. Two support clamping rods 607 are movably installed inside the support neck 604. Limiting springs 608 are fixedly installed on the separated sides of the two support clamping rods 607. Slide openings 609 are opened on the front and back of the support neck 604. A support shaft 610 is movably installed at the bottom between the two support clamping rods 607. Resistance increasing blocks 612 are fixedly installed on the inner sides of the two clamping arms 606. A rotating groove 613 is opened on the inner wall of the upper locking nut 605.

[0038] A mechanical and electrical pipe well precast slab sleeve positioning construction method includes the following steps:

[0039] 1) Place the two scale plates 1 on both sides of the support formwork 5 according to the pipe well size, and ensure that the starting points of the two scale plates 1 are on the same horizontal line. After the same number of scale cross bars 4 are sleeved into the internal support device 6, snap them into the inside of the chute grooves 3 of the scale plates 1 according to the number of pipelines;

[0040] 2) The scale plates 1 and the scale cross bars 4 are provided with scales. When in use, it can ensure that multiple pipe sleeves can be accurately positioned as required. After the civil engineering has set up the formwork, place the sleeves of corresponding sizes in the pipe well according to the number of pipelines. According to the pipe well layout positioning drawing, select the specified scale on the scale plate 1 to determine the accurate positioning of the first sleeve in the X-axis direction, and select the specified scale on the scale cross bar 4 to determine the accurate positioning of the first sleeve in the Y-axis direction;

[0041] 3) After determining the specific positions of the sleeve scale crossbar 4 and the scale board 1, adjust the position of the lock nut 605 above the inner support neck 604 inside the inner support device 6, and fix the inner support device 6 on the scale crossbar 4 so that it cannot move freely;

[0042] 4) Adjust the position of the lower lock nut 605 to adjust the angle between the two support legs 602. After the support sole 603 is in close contact with the inner wall of the sleeve, lock the position;

[0043] 5) On the premise of not affecting the close contact of the pipeline, control the length of the support legs 602 and the width of the support soles 603 during production to ensure that they can maintain close contact with the inner walls of pipelines with diameters ranging from DN100 to DN600 and have sufficient contact area, making the operation more convenient;

[0044] 6) And so on. According to the pipe well layout positioning diagram, accurately determine the positioning of other sleeves one by one and lock the center positions of the sleeves. After the positioning is completed, mark the positions of each sleeve, then the mechanical and electrical pipe well sleeve positioning device can be removed for turnover use.

[0045] In summary, for the positioning construction method of the precast slab casing in the mechanical and electrical pipe shaft, by setting the scale board 1, placing two scale boards 1 on both sides of the support formwork 5 according to the pipe shaft size, and ensuring that the starting points of the two scale boards 1 are on the same horizontal line. After sleeving the same number of scale crossbars 4 into the inner support device 6 according to the number of pipes, the scale crossbars 4 are clamped into the internal chute 3 of the scale board 1. Since the scale board 1 and the scale crossbar 4 are provided with scales, when in use, it can ensure that multiple pipe casings can be accurately positioned as required. After the civil engineering has set up the formwork, corresponding-sized casings are placed in the pipe shaft according to the number of pipes. According to the pipe shaft layout positioning drawing, select the specified scale on the scale board 1 to determine the accurate positioning of the first casing in the X-axis direction, and select the specified scale on the scale crossbar 4 to determine the accurate positioning of the first casing in the Y-axis direction. After determining the specific positions of the scale crossbar 4 and the scale board 1 of this casing, adjust the position of the lock nut 605 above the internal support neck 604 of the inner support device 6 to fix the inner support device 6 on the scale crossbar 4 so that it cannot move freely. Adjust the position of the lower lock nut 605 to adjust the angle between the two support legs 602 until the support sole 603 is tightly attached to the inner wall of the casing, and then lock the position. Without affecting the tight fit of the pipes, during manufacturing, control the length of the support legs 602 and the width of the support sole 603 to ensure that they can be tightly attached to the inner walls of pipes with diameters ranging from DN100 to DN600 and have sufficient contact area, which makes the operation more convenient. And so on, according to the pipe shaft layout positioning drawing, determine the accurate positioning of other casings one by one and lock the center positions of the casings. After the positioning is completed, mark the positions of each casing, then the positioning device for the mechanical and electrical pipe shaft casing can be removed for turnover use. The device of the present utility model has a simple structure, is easy to process and manufacture, is convenient to carry and promote, and can install the casing on the precast slab more firmly.

[0046] In this embodiment, by setting the inner support device 6, when supporting the scale crossbar 4, the scale crossbar 4 is clamped at the top of the support neck 604 through two clamping arms 606. When clamping, by rotating the upper locking nut 605, the locking nut 605 rotates on the outer surface of the support neck 604 to realize lifting and lowering. When the locking nut 605 rises, it will drive the support shaft 610 to move upward between the two support clamping rods 607, thereby expanding the distance between the two support clamping rods 607. Under the action of the lever principle, the two clamping arms 606 are forced to open outward, and the scale crossbar 4 is placed between the clamping arms 606. Then, rotate the locking nut 605 downward, and under the action of the limit spring 608, it is reset to clamp and lock the scale crossbar 4 to ensure the support of the scale crossbar, solving the problem of inaccurate positioning of the mechanical and electrical pipe well casing and the problem that the space in the pipe well may be narrow after the pipeline construction is completed, resulting in difficult construction of the post-cast floor slab. Thus, the accurate positioning of multiple casings in the pipe well is realized, which not only ensures that the verticality of the pipeline installation meets the requirements and avoids the risk of subsequent rectification of the casing, but also avoids the difficulty of the later civil engineering hole plugging and finishing, thereby reducing the additional construction cost.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning construction device for precast slab sleeves in an electromechanical pipe well, comprising two scale plates (1). Characterized in that: Fixed legs (2) are fixedly installed on the left and right sides of the bottoms of the two scale plates (1). Slide grooves (3) are opened on the opposite sides of the two scale plates (1). A scale cross bar (4) is slidably installed between the two scale plates (1). A support formwork (5) is placed at the bottom between the two scale plates (1). An internal support device (6) is arranged at the bottom of the scale cross bar (4). A support cylinder (7) is fixedly installed inside the support formwork (5) and on the outer surface of the internal support device (6). A sliding sleeve (8) is slidably installed inside the slide groove (3). A pressing plate (9) is movably installed on the back of the sliding sleeve (8). A support plate (10) is movably installed inside the sliding sleeve (8). A plug shaft (11) is inserted into the front surface of the support plate (10). A support spring (12) is fixedly installed at the bottom of the support plate (10). The support plate (10) is rotationally installed inside the sliding sleeve (8) through the plug shaft (11). The support spring (12) is located at the rear side of the bottom of the support plate (10). The pressing plate (9) is fixedly installed on the back of the support plate (10), and the back surface of the pressing plate (9) penetrates through the rear opening and extends to the rear side of the sliding sleeve (8). The internal support device (6) includes a base (601). The base (601) is movably installed inside the support cylinder (7). Support legs (602) are movably installed on the left and right sides of the base (601). Support feet (603) are movably installed at the bottoms of the support legs (602). The top of the base (601) is rotatably connected to a support neck (604). Locking nuts (605) are threadedly connected to the top and bottom of the outer surface of the support neck (604). Clamping arms (606) are movably installed on the left and right sides of the top of the support neck (604). Two support clamping rods (607) are movably installed inside the support neck (604). Limiting springs (608) are fixedly installed on the separated sides of the two support clamping rods (607). Slide openings (609) are opened on the front and back surfaces of the support neck (604). A support shaft (610) is movably installed at the bottom between the two support clamping rods (607). Pins are fixedly installed on the front and back surfaces of the support shaft (610). The pins penetrate through the slide openings (609) and extend into the internal rotation slots (613) for sliding connection therewith. Resistance increasing blocks (612) are fixedly installed on the inner sides of the two clamping arms (606). A rotation slot (613) is opened on the inner wall of the upper locking nut (605).

2. A positioning construction device for precast slab sleeves in an electromechanical pipe well according to claim 1. Characterized in that: Scale rulers are printed on the outer surfaces of the scale plates (1) and the scale cross bar (4). The scale plates (1) are 50*50mm square steel.

3. A positioning construction device for precast slab sleeves in an electromechanical pipe well according to claim 1. Characterized in that: The scale cross bar (4) is a galvanized steel pipe with a diameter of DN15, and the number of scale cross bars (4) is the same as the number of sleeves to be installed.

4. An electromechanical pipe well precast slab sleeve positioning construction device according to claim 1, characterized in that: The front and rear ends of the scale cross bar (4) are respectively slidably installed inside two sliding grooves (3), and the scale cross bar (4) is fixed above the support formwork (5) through an internal support device (6).

5. An electromechanical pipe well precast slab sleeve positioning construction device according to claim 1, characterized in that: The support cylinder (7) is slidably installed on the inner bottom wall of the support formwork (5), and the support cylinder (7) is located below the corresponding scale cross bar (4).

6. An electromechanical pipe well precast slab sleeve positioning construction device according to claim 1, characterized in that: Openings are formed in the front and back surfaces of the sliding sleeve (8), the scale cross bar (4) penetrates through the front opening and extends into the sliding sleeve (8), and the scale cross bar (4) is located on the top of the support plate (10).

7. An electromechanical pipe well precast slab sleeve positioning construction device according to claim 1, characterized in that: The outer surface of the support sole (603) is slidably connected to the inner wall of the support cylinder (7), and the two support clamping rods (607) are arranged in a cross pattern.

8. An electromechanical pipe well precast slab sleeve positioning construction device according to claim 7, characterized in that: One end of the limiting spring (608) away from the support clamping rod (607) is fixedly connected to the inner wall of the support neck (604).

9. An electromechanical pipe well precast slab sleeve positioning construction method, including the construction method of the electromechanical pipe well precast slab sleeve positioning construction device according to any one of claims 1-8, characterized in that: The construction method includes the following steps: 1) Place the two scale plates (1) on both sides of the support formwork (5) according to the pipe well size, and ensure that the starting points of the two scale plates (1) are on the same horizontal line. After sleeving the internal support device (6) on the same number of scale cross bars (4) according to the number of pipelines, snap them into the inside of the sliding grooves (3) of the scale plates (1); 2) The scale plates (1) and the scale cross bars (4) are provided with scales. During use, accurate positioning of multiple pipe sleeves can be ensured as required. After the civil engineering has set up the formwork, place sleeves of corresponding sizes in the pipe well according to the number of pipelines. According to the pipe well layout positioning drawing, select the specified scale on the scale plate (1) to determine the accurate positioning of the first sleeve in the X-axis direction, and select the specified scale on the scale cross bar (4) to determine the accurate positioning of the first sleeve in the Y-axis direction; 3) After determining the specific positions of the scale cross bar (4) and the scale plate (1) of the sleeve, adjust the position of the lock nut (605) above the support neck (604) inside the internal support device (6), and fix the internal support device (6) on the scale cross bar (4) so that it cannot move freely; 4) Adjust the position of the lower lock nut (605) to adjust the angle between the two support legs (602), and lock the position after the support sole (603) is closely attached to the inner wall of the sleeve. 5) Without affecting the tight fit of the pipeline, during manufacturing, control the length of the support leg (602) and the width of the support sole (603) to ensure that they can maintain a tight fit with the inner wall of pipelines with diameters ranging from DN100 to DN600, and have sufficient contact area, making the operation more convenient; 6) And so on. According to the pipe well layout positioning diagram, accurately determine the positioning of other sleeves one by one and lock the center positions of the sleeves. After the positioning is completed, mark the position of each sleeve, then the mechanical and electrical pipe well sleeve positioning device can be removed for turnover use.

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