A horizontal closed positioning device for centering embedded parts of steel structures and a construction method thereof

Abstract

The invention discloses a horizontal closed type positioning device for centering embedded parts of steel structures, comprising a positioning plate, a first clamping member and a second clamping member are arranged at the outer bottom of the positioning plate, the top of the first clamping member is fixedly connected to the bottom of the positioning plate, one end of the second clamping member is rotatably connected to one end of the first clamping member through a rotating shaft assembly, the other end of the second clamping member is connected to the other end of the first clamping member through a first buckle assembly, at least one second buckle assembly is arranged between the positioning plate and the second clamping member; the first clamping member, the second clamping member and the positioning plate enclose an installation space for installing embedded parts of steel structures; a vertically distributed laser indicator is arranged at the center of the positioning plate, and the laser beam emitted by the laser indicator is perpendicular to the positioning plate; a first bubble level and a second bubble level that are vertically distributed to each other are arranged on the positioning plate. The invention can simultaneously perform centering and leveling, and the leveling process is completed in one step, which is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a horizontal closed positioning device for centering embedded parts of a steel structure and a construction method thereof. Background Art

[0002] Embedded parts (prefabricated embedded parts) are components pre-installed (buried) in concealed projects. They are components placed during the pouring of the structure and used for lap joints when building the superstructure. Some embedded parts used on piles, columns or caps are Figure 1 The shapes of these embedded parts correspond to the piles or columns, generally in the shape of a disc or a square, and a through hole is provided in the center of the embedded part for vibrating the concrete inside the pile or column.

[0003] However, when setting these embedded parts, it is necessary to keep the embedded parts horizontal, and the through holes on the embedded parts should correspond to the center of the pile or column. Therefore, it is necessary to perform centering and leveling when setting the embedded parts. Figure 2 The existing practice is to first build a steel cage of a pile or column on the building foundation, and draw a cross mark at the center of the bottom of the steel cage to mark the center; then the worker moves the embedded parts to the top of the steel cage, and puts the bubble level on the embedded parts for leveling. During the leveling process, the position of the bubble level needs to be changed several times to ensure that the embedded parts are level; at the same time, the worker uses a thin rope to hang heavy objects for centering; finally, the worker fixes the embedded parts to the steel cage. The existing practice, on the one hand, is inefficient in centering and leveling, takes a very long time, and the accuracy of centering and leveling is not high enough; on the other hand, during the process of workers fixing the embedded parts to the steel cage, the position of the embedded parts will be offset, resulting in the inaccurate position of the embedded parts after they are fixed. Summary of the invention

[0004] The purpose of the present invention is to provide a horizontal closed positioning device for centering embedded parts of steel structures and a construction method thereof, which solves the problems of low efficiency and insufficient accuracy of centering and leveling of existing embedded parts.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides a horizontal closed positioning device for centering embedded parts of steel structures, comprising a positioning plate, wherein a first clip and a second clip are provided at the bottom of the outer periphery of the positioning plate, the top of the first clip is fixedly connected to the bottom of the positioning plate, one end of the second clip is rotatably connected to one end of the first clip via a rotating shaft assembly, the other end of the second clip is connected to the other end of the first clip via a first buckle assembly, and at least one second buckle assembly is provided between the positioning plate and the second clip; an installation space for installing embedded parts of steel structures is formed between the first clip, the second clip and the positioning plate; a vertically distributed laser indicator is provided at the center of the positioning plate, and the laser beam emitted by the laser indicator is perpendicular to the positioning plate; a first bubble level and a second bubble level distributed perpendicularly to each other are provided on the positioning plate.

[0007] Furthermore, the positioning plate includes an annular plate adapted to the shape of the steel structure embedded part and two straight plates intersecting vertically in the annular plate, the intersection of the two straight plates is located at the center of the positioning plate, and the first bubble level and the second bubble level are respectively arranged on the two straight plates.

[0008] Furthermore, the steel structure embedded part is a disc body with a through hole in the middle, and the annular plate is in a circular ring shape.

[0009] Furthermore, a semicircular ring plate parallel to the ring plate is provided at the bottom of the first clamping member and the bottom of the second clamping member.

[0010] Furthermore, the rotating shaft assembly includes a bolt, a nut and three coaxially distributed hinged parts with axial holes, the hinged part located in the middle is fixed on the second clamping part, the hinged parts located at both ends are fixed on the first clamping part, the bolt passes through the three hinged parts, and the nut connects the bolt.

[0011] Furthermore, the first buckle assembly and the second buckle assembly both include a fixed buckle and a movable buckle, the movable buckle includes a bracket, a handle and a U-shaped locking hook, the handle is hinged to the bracket, and the U-shaped locking hook is hinged to the handle, and the U-shaped locking hook can be driven to engage or disengage with the fixed buckle by rotating the handle; the fixed buckle and the bracket in the first buckle assembly are respectively arranged on the second clip and the first clip, and the fixed buckle and the bracket in the second buckle assembly are respectively arranged on the second clip and the positioning plate.

[0012] Furthermore, the U-shaped locking hook includes a connecting rod and two arc-shaped arms, and two ends of the connecting rod are respectively connected to the two arc-shaped arms.

[0013] In a second aspect, the present invention provides a construction method of the horizontal closed positioning device for centering the embedded parts of the steel structure as described in any one of the above items, comprising the following steps:

[0014] Step 1: Install the steel structure embedded parts on the horizontal closed positioning device;

[0015] Step 2: mark the center with a cross mark on the bottom of the steel cage, move the horizontal closed positioning device and the steel structure embedded parts onto the steel cage as a whole, align them with the laser beam emitted by the laser indicator, and level them with the first bubble level and the second bubble level;

[0016] Step 3: After the centering and leveling are completed, the steel cage is welded and fixed to the steel structure embedded parts while the position of the steel structure embedded parts is maintained, so that the position of the steel structure embedded parts is fixed;

[0017] Step 4: remove the horizontal closed positioning device from the steel structure embedded parts.

[0018] Furthermore, in step one, the first buckle assembly and the second buckle assembly on the horizontal closed positioning device are first opened so that the first buckle assembly and the second buckle assembly do not block the steel structure embedded part, and then the second clip is rotated to open, and the horizontal closed positioning device is inserted into the steel structure embedded part from any horizontal direction, and then the second clip is rotated in the opposite direction to lock it with the first clip, and the first buckle assembly and the second buckle assembly are buckled, so that the steel structure embedded part is fixed in the installation space and cannot fall out.

[0019] Furthermore, a steel bar is first welded to the bottom of the steel structure embedded part, and then the steel structure embedded part is installed on the horizontal closed positioning device; when the horizontal closed positioning device and the steel structure embedded part are moved onto the steel cage as a whole, the steel bar is inserted into the steel cage; after the centering and leveling of the steel structure embedded part is completed, while maintaining the position of the steel structure embedded part, the steel bar and the steel cage are fixed by bundling and / or welding.

[0020] Compared with the prior art, the present invention provides a horizontal closed positioning device for centering embedded parts of steel structures and a construction method thereof, which has the following beneficial effects:

[0021] The present invention can be horizontally installed on a circular steel structure embedded part from any direction of 360°. By snapping and locking the first buckle component and the second buckle component, the horizontal closed positioning device can be easily fixed on the steel structure embedded part. At the same time, it is convenient to disassemble. By opening the first buckle component and the second buckle component, the horizontal closed positioning device can be taken off and installed on the next steel structure embedded part. The assembly thinking is adopted, which effectively improves the installation efficiency and the installation accuracy.

[0022] In addition, through the horizontal closed positioning device of the present invention, centering and leveling can be performed simultaneously. The leveling process is completed in one step, and there is no need to change the position measurement multiple times as in the past; the centering process only needs to observe whether the laser beam emitted by the laser pointer corresponds to the center position, which is simple and convenient; the laser pointer and the bubble level are observed at the same time to avoid adjusting one of them while the other is offset; in addition, the laser pointer and the bubble level are always set on the embedded parts before the embedded parts are fixed, so that it is convenient to observe whether the position of the embedded parts is offset at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art 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 labor.

[0024] Figure 1 It is a structural schematic diagram of embedded parts of steel structure;

[0025] Figure 2 It is a structural schematic diagram of the steel cage;

[0026] Figure 3 It is a structural schematic diagram of a horizontal closed positioning device;

[0027] Figure 4 A schematic diagram of the structure of a horizontal closed positioning device from another perspective;

[0028] Figure 5 is a schematic structural diagram of a first buckle assembly;

[0029] Figure 6 is a schematic structural diagram of a second buckle assembly;

[0030] Figure 7 This is a schematic diagram of the structure after welding steel bars to the embedded parts of the steel structure;

[0031] Figure 8 It is a schematic diagram of the installation of the horizontal closed positioning device and the embedded parts of the steel structure;

[0032] Fig. 9 It is a structural schematic diagram of the steel structure embedded parts installed on the horizontal closed positioning device;

[0033] Fig.10 It is a schematic diagram of the structure after the horizontal closed positioning device and the embedded steel structure parts are moved onto the steel cage;

[0034] Fig.11This is a schematic diagram of the structure after the horizontal closed positioning device is removed.

[0035] Figure markings: 1. positioning plate; 11. laser pointer; 12. first bubble level; 13. second bubble level; 14. annular plate; 15. straight plate; 2. first clamping part; 21. semicircular annular plate; 3. second clamping part; 4. rotating shaft assembly; 41. bolt; 42. nut; 43. hinged part; 5. first buckle assembly; 51. fixed buckle; 52. movable buckle; 521. bracket; 522. handle; 523. U-shaped locking hook; 6. second buckle assembly; 7. embedded steel structure part; 71. through hole; 72. steel bar; 8. steel cage; 81. cross mark. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Please refer to Figures 3 to 6 , shows a horizontal closed positioning device for centering embedded parts of steel structures, including a positioning plate 1, a first clip 2 and a second clip 3 are provided at the outer bottom of the positioning plate 1, the top of the first clip 2 is fixedly connected to the bottom of the positioning plate 1, one end of the second clip 3 is rotatably connected to one end of the first clip 2 through a rotating shaft assembly 4, the other end of the second clip 3 is connected to the other end of the first clip 2 through a first buckle assembly 5, and two second buckle assemblies 6 are provided between the positioning plate 1 and the second clip 3; the first clip 2, the second clip 3 and the positioning plate 1 enclose an installation space for installing embedded parts 7 of steel structures; a vertically distributed laser indicator 11 is provided at the center position of the positioning plate 1, and the laser beam emitted by the laser indicator 11 is perpendicular to the positioning plate 1; the positioning plate 1 is provided with a first bubble level 12 and a second bubble level 13 which are vertically distributed to each other.

[0041] Specifically, the first buckle assembly 5 and the second buckle assembly 6 on the horizontal closed positioning device are first opened so that the first buckle assembly 5 and the second buckle assembly 6 do not block the steel structure embedded part 7, and then the second clip 3 is rotated to open, and the steel structure embedded part 7 is inserted into the installation space of the horizontal closed positioning device from any horizontal direction, and then the second clip 3 is reversely rotated to lock with the first clip 2, and the first buckle assembly 5 and the second buckle assembly 6 are buckled and locked, so that the steel structure embedded part 7 is fixedly combined with the horizontal closed positioning device. The positioning plate 1 is provided with a laser indicator 11, a first bubble level 12 and a second bubble level 13, and the horizontality of the steel structure embedded part 7 is adjusted by the first bubble level 12 and the second bubble level 13, and a laser beam is emitted by the laser indicator 11, and the laser beam passes through the through hole 71 on the steel structure embedded part 7 for centering. It should be noted that the first bubble level 12 and the second bubble level 13 may have the same structure, including a level tube, which is made of glass. The inner wall of the level tube is a curved surface with a certain radius of curvature. The tube is filled with liquid. When the level tube is tilted, the bubble in the level tube moves to the raised end, thereby determining the position of the horizontal plane.

[0042] In this way, the horizontal closed type positioning device can be horizontally installed on the steel structure embedded part 7 from any direction of 360°. By fastening and locking the first buckle assembly 5 and the second buckle assembly 6, the horizontal closed type positioning device can be easily fixed on the steel structure embedded part 7, and it is convenient to disassemble. The first buckle assembly 5 and the second buckle assembly 6 can be opened to remove the horizontal closed type positioning device and install it on the next steel structure embedded part. The assembly thinking is adopted to effectively improve the installation efficiency and installation accuracy. In addition, through the horizontal closed type positioning device, centering and leveling can be performed at the same time. The leveling process is completed in one step, and there is no need to change the position measurement many times as in the past; the centering process only needs to observe whether the laser beam emitted by the laser indicator 11 corresponds to the center position, which is simple and convenient; the laser indicator and the bubble level are observed at the same time to avoid adjusting one of them while the other is offset; in addition, the laser indicator and the bubble level are always set on the embedded part before the embedded part is fixed, so that it is convenient to observe whether the position of the embedded part is offset at any time.

[0043] In some specific embodiments, reference Figure 3 The positioning plate 1 includes an annular plate 14 adapted to the shape of the steel structure embedded part 7 and two straight plates 15 vertically intersecting in the annular plate 14. The intersection of the two straight plates 15 is located at the center of the positioning plate 1. The first bubble level 12 and the second bubble level 13 are respectively arranged on the two straight plates 15. In this way, four hollow parts are staggered between the two straight plates 15 and the annular plate 14, which helps to reduce the overall weight of the positioning plate and achieve the purpose of reducing costs.

[0044] More specifically, the steel structure embedded part 7 is a disk having a through hole 71 in the middle, and the annular plate 14 is annular. The first clamping part 2 and the second clamping part 3 are semicircular plates that can be closed to form a complete circle.

[0045] refer to Figure 3 and Figure 4 In order to firmly combine the steel structure embedded part 7 with the horizontal closed type positioning device, the bottom of the first clamping part 2 and the bottom of the second clamping part 3 are both provided with a semicircular ring plate 21 parallel to the ring plate 14. The semicircular ring plate 21 can support the bottom of the steel structure embedded part 7.

[0046] Preferably, the positioning plate 1 is a circular thin iron plate, and the first clamping member 2 and the second clamping member 3 are semicircular angle steels, so that the main structure of the horizontal closed positioning device is made of easily available materials. After the first clamping member 2 and the second clamping member 3 are closed, the installation space surrounded by the positioning plate 1, the first clamping member 2, and the second clamping member 3 is a cylindrical shape that matches the shape of the steel structure embedded member 7.

[0047] In some specific embodiments, reference Figure 4 In order to facilitate the rotational connection and installation of the first clamping member 2 and the second clamping member 3, the rotating shaft assembly 4 includes a bolt 41, a nut 42 and three coaxially distributed hinged parts 43 with axial holes. The hinged part 43 located in the middle is welded and fixed to the second clamping member 3, and the hinged parts 43 located at both ends are welded and fixed to the first clamping member 2. The bolt 41 is passed through the three hinged parts 43 and then the nut 42 is used to lock the bolt 41.

[0048] In some specific embodiments, reference Figure 3 to Figure 6 , the first buckle assembly 5 and the second buckle assembly 6 both include a fixed buckle 51 and a movable buckle 52, the movable buckle 52 includes a bracket 521, a handle 522 and a U-shaped lock hook 523, the handle 522 is hinged to the bracket 521, the U-shaped lock hook 523 is hinged to the handle 522, and the U-shaped lock hook 523 can be driven to engage or disengage the fixed buckle 51 by rotating the handle 522. The fixed buckle and the bracket in the first buckle assembly 5 are respectively welded and fixedly arranged on the second clip 3 and the first clip 2, and the fixed buckle and the bracket in the second buckle assembly 6 are respectively welded and fixedly arranged on the second clip 3 and the positioning plate 1.

[0049] More specifically, see Figure 5 and Figure 6 In order to further facilitate engagement or disengagement, the U-shaped locking hook 523 includes a connecting rod and two arc-shaped arms, and the two ends of the connecting rod are respectively connected to the two arc-shaped arms.

[0050] As a preferred embodiment, the fixed buckles 51 in the two second buckle components 6 are symmetrically distributed on the second clip 3 and located on the symmetry line formed by two mutually perpendicular straight plates 15; and the movable buckles 52 in the two second buckle components 6 are correspondingly distributed on the positioning plate 1.

[0051] In practical applications, reference Figure 7 to Figure 11 The construction method using any one of the above-mentioned horizontal closed positioning devices for centering embedded parts of steel structures comprises the following steps:

[0052] Step 1: Install the steel structure embedded part 7 on the horizontal closed positioning device. Figure 7 First, weld the steel bar 72 at the bottom of the steel structure embedded part 7; then, refer to Figure 8, open the first buckle assembly 5 and the second buckle assembly 6 on the horizontal closed positioning device so that the first buckle assembly 5 and the second buckle assembly 6 do not block the steel structure embedded part 7, then rotate and open the second clamping member 3, insert the horizontal closed positioning device into the steel structure embedded part 7 from any horizontal direction, then reversely rotate the second clamping member 3 to lock it with the first clamping member 2, and buckle the first buckle assembly 5 and the second buckle assembly 6, so that the steel structure embedded part 7 is fixed in the installation space and cannot fall out, as shown in FIG. Fig. 9 shown.

[0053] Step 2: mark the center with a cross mark 81 at the bottom of the steel cage 8, move the horizontal closed type positioning device and the steel structure embedded part 7 as a whole onto the steel cage 8, insert the steel bar 72 into the steel cage 8, center it with the laser beam emitted by the laser pointer 11, and level it with the first bubble level 12 and the second bubble level 13. Specifically, refer to Fig.10 You can first observe the first bubble level 12 and the second bubble level 13, and then observe the laser beam emitted by the laser pointer 11. When the bubbles on the first bubble level 12 and the second bubble level 13 are both located on the horizontal line, it means that the steel structure embedded part 7 is placed horizontally. In the horizontal state, the laser beam emitted by the laser pointer 11 is vertical, and when the laser beam is facing the center of the cross mark 81, the centering is completed.

[0054] Step three, after the centering and leveling is completed, while maintaining the position of the steel structure embedded part 7, the steel cage 8 is welded to the steel structure embedded part 7 to fix the position of the steel structure embedded part 7. Specifically, the steel cage 8 can be welded to some steel bars 72, and the laser beam emitted by the first bubble level 12, the second bubble level 13 and the laser indicator 11 can be observed during the welding process to avoid the position of the steel structure embedded part 7 from shifting; when the steel cage 8 is welded to some steel bars 72, and the steel structure embedded part 7 shifts, the steel cage 8, the steel bars 72 or the steel structure embedded part 7 are gently tapped with a hammer or other tool to fine-tune the position of the steel structure embedded part 7. After the fine-tuning is completed, the steel cage 8 is welded to the remaining steel bars 72 to completely fix the steel structure embedded part 7.

[0055] It should be noted that the position of the steel structure embedded part 7 can be restored to the accurate position by fine-tuning the position of the steel structure embedded part 7. This is because the first bubble level 12, the second bubble level 13 and the laser beam emitted by the laser indicator 11 are observed during the welding process of the steel cage 8 and certain steel bars 72, so that the position of the steel structure embedded part 7 will not be greatly offset and can be adjusted by fine-tuning.

[0056] Step 4: Remove the horizontal closed type positioning device from the steel structure embedded part 7. Fig.11 When removing the horizontal closed positioning device, first open the first buckle assembly 5 and the second buckle assembly 6, then rotate and open the second clamping member 3, and then remove the horizontal closed positioning device from the steel structure embedded part 7. The operation is simple and convenient, which improves the efficiency of centering and leveling, and also improves the accuracy of centering and leveling.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A horizontal closed positioning device for centering embedded parts of steel structures, characterized in that: It includes a positioning plate, and a first clip and a second clip are provided at the bottom of the outer periphery of the positioning plate, the top of the first clip is fixedly connected to the bottom of the positioning plate, one end of the second clip is rotatably connected to one end of the first clip by a rotating shaft assembly, the other end of the second clip is connected to the other end of the first clip by a first buckle assembly, and at least one second buckle assembly is provided between the positioning plate and the second clip; the first clip, the second clip and the positioning plate enclose an installation space for installing steel structure embedded parts; a vertically distributed laser indicator is provided at the center position of the positioning plate, and the laser beam emitted by the laser indicator is perpendicular to the positioning plate; the positioning plate is provided with a first bubble level and a second bubble level distributed perpendicular to each other.

2. The horizontal closed positioning device according to claim 1, characterized in that: The positioning plate includes an annular plate adapted to the shape of the steel structure embedded part and two straight plates vertically intersecting each other in the annular plate. The intersection of the two straight plates is located at the center of the positioning plate. The first bubble level and the second bubble level are respectively arranged on the two straight plates.

3. The horizontal closed positioning device according to claim 2, characterized in that: The steel structure embedded part is a disc body with a through hole in the middle, and the annular plate is in the shape of a circular ring.

4. The horizontal closed positioning device according to claim 3, characterized in that: The bottom of the first clamping member and the bottom of the second clamping member are both provided with a semicircular ring plate parallel to the ring plate.

5. The horizontal closed positioning device according to claim 1, characterized in that: The rotating shaft assembly includes a bolt, a nut and three coaxially distributed hinged parts with axial holes. The hinged part located in the middle is fixed on the second clamping part, and the hinged parts located at both ends are fixed on the first clamping part. The bolt passes through the three hinged parts, and the nut connects the bolt.

6. The horizontal closed positioning device according to claim 1, characterized in that: The first buckle assembly and the second buckle assembly both include a fixed buckle and a movable buckle, the movable buckle includes a bracket, a handle and a U-shaped locking hook, the handle is hinged to the bracket, the U-shaped locking hook is hinged to the handle, and the U-shaped locking hook can be driven to engage or disengage the fixed buckle by rotating the handle; the fixed buckle and the bracket in the first buckle assembly are respectively arranged on the second clip and the first clip, and the fixed buckle and the bracket in the second buckle assembly are respectively arranged on the second clip and the positioning plate.

7. The horizontal closed positioning device according to claim 6, characterized in that: The U-shaped locking hook comprises a connecting rod and two arc-shaped arms, and two ends of the connecting rod are respectively connected to the two arc-shaped arms.

8. The construction method of the horizontal closed type positioning device for centering the embedded parts of steel structures according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Install the steel structure embedded parts on the horizontal closed positioning device; Step 2: mark the center with a cross mark on the bottom of the steel cage, move the horizontal closed positioning device and the steel structure embedded parts onto the steel cage as a whole, align them with the laser beam emitted by the laser indicator, and level them with the first bubble level and the second bubble level; Step 3: After the centering and leveling are completed, the steel cage is welded and fixed to the steel structure embedded parts while the position of the steel structure embedded parts is maintained, so that the position of the steel structure embedded parts is fixed; Step 4: remove the horizontal closed positioning device from the steel structure embedded parts.

9. The construction method according to claim 8, characterized in that: In step one, first open the first buckle assembly and the second buckle assembly on the horizontal closed positioning device so that the first buckle assembly and the second buckle assembly do not block the steel structure embedded part, then rotate and open the second clip, insert the horizontal closed positioning device into the steel structure embedded part from any horizontal direction, then reversely rotate the second clip to lock it with the first clip, and buckle the first buckle assembly and the second buckle assembly so that the steel structure embedded part is fixed in the installation space and cannot fall out.

10. The construction method according to claim 8, characterized in that: First, a steel bar is welded at the bottom of the steel structure embedded part, and then the steel structure embedded part is installed on the horizontal closed positioning device; when the horizontal closed positioning device and the steel structure embedded part are moved onto the steel cage as a whole, the steel bar is inserted into the steel cage; after the centering and leveling of the steel structure embedded part is completed, the steel bar and the steel cage are fixed by bundling and / or welding while maintaining the position of the steel structure embedded part.

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