An accurate positioning device for external frame expanded metal

Abstract

The present application provides an accurate positioning device for external frame steel mesh, which includes a plurality of long steel pipes and short steel pipes that are alternately arranged up and down in sequence; the long steel pipes are detachably installed on the external scaffolding, and a horizontal bubble level, a laser instrument and a first four-corner plate are sequentially installed on the long steel pipes along the length direction, and a first scale line is provided on the outer side wall; the laser instrument is installed directly above the zero scale line on the first scale line of the long steel pipe and can rotate along the outer peripheral wall of the long steel pipe; the first four-corner plate is movably connected to one end of the long steel pipe in a direction close to or away from the long steel pipe; the short steel pipe is horizontally arranged and detachably installed on the external scaffolding, and a second four-corner plate that can move in a direction close to or away from the short steel pipe is installed on one end of the short steel pipe. The device has a simple structure, is convenient to use, and saves time and effort.

Description

Technical Field

[0001] This application relates to the field of construction, and particularly to a precise positioning device for steel mesh on external scaffolds. Background Art

[0002] The external scaffolding project is a major dangerous project in building construction. The quality and standardized erection of various materials required for the external scaffolding have an inestimable impact on the safety of the entire external scaffolding system.

[0003] Traditional ordinary external scaffolds are basically ordinary steel pipe scaffolds with green safety mesh. The quality of the mesh on the market varies, and it is often damaged easily due to long construction time, exposure to sunlight and rain. During the construction of the main structure, it is also easily contaminated and damaged by concrete slag and brick slag. The dust flying and high-altitude falling caused by the damage are not conducive to environmental protection and aesthetics, nor to the safety and civilized standardized construction management. When using steel mesh for construction, the external facade is likely to be uneven and have large gaps due to the unevenness of the external scaffolding, affecting the aesthetics. Summary of the Invention

[0004] One of the purposes of this application is to provide a precise positioning device for steel mesh on external scaffolds to solve the problem that the external facade is likely to be uneven when using existing steel mesh for construction due to the unevenness of the external scaffolding.

[0005] The technical solution of this application is as follows:

[0006] A precise positioning device for steel mesh on external scaffolds includes a plurality of long steel pipes and short steel pipes that are sequentially arranged parallel and spaced up and down. The long steel pipes are horizontally arranged and detachably installed on the external scaffolding. Along the length direction of the long steel pipes, a horizontal bubble level, a laser instrument, and a first four-corner plate are sequentially installed at intervals. A first scale line is arranged along the length direction on the outer side wall of the long steel pipe. The horizontal bubble level is installed on the outer side wall of the long steel pipe and is used to detect the levelness of the long steel pipe. The laser instrument is installed directly above the zero scale line on the first scale line of the long steel pipe and can rotate along the outer peripheral wall of the long steel pipe, and detects the levelness and perpendicularity of the long steel pipe and the short steel pipe by emitting laser light. The first four-corner plate is movably connected to one end of the long steel pipe in a direction close to or away from the long steel pipe. The short steel pipes are horizontally arranged and detachably installed on the external scaffolding, and a second four-corner plate that can move in a direction close to or away from the short steel pipe is installed at one end of the short steel pipe.

[0007] As a technical solution of this application, a rubber sleeve is sleeved on the long steel pipe, and the horizontal bubble level is installed on the rubber sleeve.

[0008] As a technical solution of this application, the horizontal bubble level is arranged on the long steel pipe along a direction parallel to the axis of the long steel pipe.

[0009] As a technical solution of the present application, a rotatable rotating shaft disk is sleeved on the long steel tube, and the rotating shaft disk is sleeved at the zero scale line on the first scale line of the long steel tube, and a limit pin is hinged on the outer wall; four stop pins are fixedly installed on the long steel tube at equal intervals in the circumferential direction, which are used to block or separate from the limit pins so that the rotating shaft disk can be limited or rotated.

[0010] As a technical solution of the present application, the shift pin is perpendicular to the outer wall of the long steel tube.

[0011] As a technical solution of the present application, a movable first engaging rod and a rotatable first rotating gear rod are installed in the inner cavity of the long steel tube; one end of the first engaging rod passes through the other end of the long steel tube, and the other end is transmission-connected to the first square plate, which is used to drive the first square plate to move in the direction approaching or away from the long steel tube; a first positioning plate is fixed on the inner wall of the long steel tube; the first rotating gear rod is threadedly engaged with the first engaging rod, and one end passes through the other end of the long steel tube, and the other end is rotatably connected to the first positioning plate; the first engaging rod is driven to move by rotating the first rotating gear rod, so that the first square plate moves in the direction approaching or away from the long steel tube.

[0012] As a technical solution of the present application, the first engaging pull rod is arranged along the axial direction of the long steel pipe, and the first rotating gear rod is arranged along a direction parallel to the axis of the long steel pipe.

[0013] As a technical solution of the present application, a second scale line arranged along the length direction is provided on the outer wall of the short steel pipe, and the laser is emitted to the short steel pipe by the laser instrument so that the zero scale line on the second scale line is on the same vertical line as the zero scale line on the first scale line.

[0014] As a technical solution of the present application, a movable second engaging rod and a rotatable second rotating gear rod are installed in the inner cavity of the short steel tube; one end of the second engaging rod passes through one end of the short steel tube, and the other end is transmission-connected to the second quadrangular disk; a second positioning plate is fixed on the inner wall of the short steel tube; the second rotating gear rod is threadedly engaged with the second engaging rod, and one end passes through one end of the short steel tube, and the other end is rotatably connected to the second positioning plate; the second engaging rod is driven to move by rotating the second rotating gear rod, so that the second quadrangular disk moves toward or away from the short steel tube.

[0015] Beneficial effects of this application:

[0016] In the precise positioning device for the outer frame steel mesh of the present application, it saves time and effort, is safe and stable. Using this device, the outer frame steel mesh can be precisely leveled and fixed with high quality, high efficiency, safety and beauty, thus solving the problem of uneven outer facade caused by the unevenness of the outer scaffolding during the installation of the steel mesh. At the same time, it saves labor, is easy to operate, safe and environmentally friendly, and can solve multiple problems at the same time, being easy and convenient. In addition, it can check the horizontal distance of the outer frame and the distance from the building edge through a spirit level and a laser instrument, and can also solve the problems of environmental beauty and safety hazards caused by the easy damage of the dense mesh of the outer frame. It can also be recycled repeatedly. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the installation of the precise positioning device for the outer frame steel mesh provided by the embodiment of the present application;

[0019] Figure 2 Schematic diagram of the long steel pipe provided by the embodiment of the present application;

[0020] Figure 3 Schematic diagram of the short steel pipe provided by the embodiment of the present application;

[0021] Figure 4 Schematic diagram of the rotating shaft disk provided by the embodiment of the present application;

[0022] Figure 5 Schematic diagram of the first four-corner plate provided by the embodiment of the present application;

[0023] Figure 6 Schematic diagram of the first angle of the first four-corner plate provided by the embodiment of the present application;

[0024] Figure 7 Schematic diagram of the installation of the steel mesh provided by the embodiment of the present application.

[0025] Reference Signs: 1 - Steel Mesh; 2 - Outer Scaffolding; 3 - Long Steel Pipe; 4 - Short Steel Pipe; 6 - Spirit Level; 7 - Laser Instrument; 8 - First Four-Corner Plate; 9 - First Scale Line; 10 - Second Four-Corner Plate; 11 - Rubber Sleeve Ring; 12 - Rotating Shaft Disk; 13 - Limit Pin; 14 - Gear Stop Pin; 15 - First Biting Pull Rod; 16 - First Rotating Gear Rod; 17 - First Positioning Plate; 18 - Second Scale Line; 19 - Second Biting Pull Rod; 20 - Second Rotating Gear Rod; 21 - Second Positioning Plate. Detailed Embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. Usually, the components of the embodiments of this application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0028] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application.

[0030] In addition, in this application, unless otherwise clearly specified and defined, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, on top of and above the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, beneath and under the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0031] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0032] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] Embodiment:

[0034] Please refer to Figure 1 , in conjunction with reference to Figures 2 to 7 , the present application provides a precise positioning device for the outer frame steel mesh 1, which mainly includes a plurality of long steel pipes 3 and short steel pipes 4 that are sequentially arranged parallel and spaced up and down; wherein, the long steel pipes 3 are horizontally arranged and detachably installed on the outer scaffolding 2, and horizontal spirit levels 6, laser instruments 7, and first four-corner plates 8 are sequentially and spacedly installed on the long steel pipes 3 along the length direction; at the same time, a first scale line 9 is arranged on the outer side wall of the long steel pipes 3 along the length direction; and, a rubber sleeve 11 is sleeved on the long steel pipes 3, the horizontal spirit level 6 is installed on the rubber sleeve 11, and the horizontal spirit level 6 is arranged on the long steel pipes 3 along a direction parallel to the axis of the long steel pipes 3, and it is used to detect the levelness of the long steel pipes 3; the laser instrument 7 is installed directly above the zero scale line on the first scale line 9 of the long steel pipes 3 and can rotate along the outer peripheral wall of the long steel pipes 3, and it detects the levelness and perpendicularity of the long steel pipes 3 and the short steel pipes 4 by emitting laser light; the first four-corner plate 8 is movably connected to one end of the long steel pipes 3 in a direction close to or away from the long steel pipes 3; the short steel pipes 4 are horizontally arranged and detachably installed on the outer scaffolding 2, and a second four-corner plate 10 that can move in a direction close to or away from the short steel pipes 4 is connected to one end of the short steel pipes 4.

[0035] It should be noted that the long steel pipe 3 with scales is made of standard steel pipes according to the transverse distance of the double-row scaffolding, the distance from the outer edge of the building, and the exposed length. Its ports are sealed with steel plates and connected to the double-row frame body with fasteners. It is set at the central axis of the outer scaffolding as the standard measurement point, and the quantity accounts for 10% of the reinforcement device. The short steel pipe 4 with scales is made of standard steel pipes according to the lap length requirement of the outer row of scaffolding. Its ports are sealed with steel plates and connected to the frame body of the outer row of the outer scaffolding with fasteners. It is installed according to the standard through the laser measurement line of the long steel pipe 3 with scales, and the quantity accounts for 90% of the reinforcement device. The rubber grommet 11 is precisely connected to the long steel pipe 3 with scales, and a horizontal spirit level 6 is set on the rubber grommet, which can ensure the horizontal and vertical of the device. The laser instrument 7 is a measuring instrument that emits laser for positioning and is horizontally installed on the rotating shaft disc 12. The first scale line 9 starts from the central axis of the laser instrument 7, and millimeter scales are set on the left and right. It is matched with the laser instrument 7 to form a measurement system, and the scale winds around the long steel pipe 3 for one circle. Both the first four-corner plate 8 and the second four-corner plate 10 are made of steel plates welded together, mainly used to fix the steel mesh 1 and fix the corner edges of the four steel meshes 1 at the same time. The rotating shaft disc 12 is made according to the bearing principle, with internal steel balls in contact with the long steel pipe 3 for easy rotation, and the external part is made of a steel ring as the rotating shaft disc 12. The mesh of the steel mesh 1 is 1.8 meters high and 1.2 meters wide, which is a whole-piece trial punching and installing mesh. For convenient, safe, firm and durable installation, the four sides are welded and fixed with small square steels, and the middle is fixed in a grid pattern to prevent deformation.

[0036] Further, a rotatable rotating shaft disc 12 is sleeved on the long steel pipe 3. The rotating shaft disc 12 is sleeved at the zero scale line on the first scale line 9 of the long steel pipe 3, and a limit nail 13 is hinged on the outer wall. By rotating the limit nail 13, it can be adjusted to a horizontal state or a vertical state; four blocking nails 14 are fixedly installed on the long steel pipe 3 at equal intervals in the circumferential direction. The blocking nails 14 are perpendicular to the outer wall of the long steel pipe 3 and are used to block or separate from the limit nail 13, so that the rotating shaft disc 12 is limited or can rotate through. When the limit nail 13 is rotated to a horizontal state, the blocking nail 14 abuts against the limit nail 13, thereby restricting the rotation of the rotating disc; when the limit nail 13 is rotated to a vertical state, the blocking nail 14 is separated from the limit nail 13, so that the rotating shaft disc 12 can rotate. The blocking nails 14 are made of small steel nails, which are installed on the long steel pipe 3 with scales, wind around the long steel pipe 3 for one circle, and one is installed every 90 degrees, with a total of four, which can ensure that the rotatable limit nail 13 in the horizontal direction can rotate through. The rotatable limit nail 13 is made of small steel nails and installed on the rotating shaft disc 12, which can ensure the vertical and horizontal states, and is used in cooperation with the blocking nail 14 to ensure that the rotating shaft disc 12 can rotate 90 degrees each time.

[0037] Meanwhile, a movable first engaging pull rod 15 and a rotatable first rotating gear rod 16 are installed in the inner cavity of the long steel pipe 3. One end of the first engaging pull rod 15 passes through the other end of the long steel pipe 3, and the other end is drivingly connected to the first four-corner plate 8 for driving the first four-corner plate 8 to move along a direction close to or away from the long steel pipe 3. Moreover, a first positioning plate 17 is fixed on the inner wall of the long steel pipe 3. In addition, the first rotating gear rod 16 is threadedly engaged with the first engaging pull rod 15, one end passes through the other end of the long steel pipe 3, and the other end is rotatably connected to the first positioning plate 17. By using tools such as a wrench to rotate the first rotating gear rod 16, the first engaging pull rod 15 threadedly engaged therewith is driven to rotate, so that the first four-corner plate 8 moves along a direction close to or away from the long steel pipe 3, and thus the four corner ends on the first four-corner plate 8 are threadedly and fixedly connected to the expanded metal mesh 1.

[0038] It should be noted that the first engaging pull rod 15 is arranged along the axial direction of the long steel pipe 3, and the first rotating gear rod 16 is arranged along a direction parallel to the axis of the long steel pipe 3. And, concave threads are provided on the outer wall of the first engaging pull rod 15, and convex threads matching the concave threads are provided on the outer wall of the first rotating gear rod 16, and the concave threads and the convex threads are threadedly engaged.

[0039] It should be noted that the first rotating gear rod 16 is arranged in the long steel pipe 3 with scales, made of round steel, with concave threads at both ends and convex threads in the middle section, and both ends are placed on the fixed steel plates and can be freely rotated by an electric wrench. The first engaging pull rod 15 is arranged in the long steel pipe 3 with scales, made of round steel, with concave threads matching the first rotating gear rod 16 at the end, one end is placed on the fixed steel plate, and the other end is connected to the first four-corner plate 8.

[0040] Furthermore, second scale lines 18 are arranged on the outer side wall of the short steel pipe 4 along the length direction. A laser is emitted from the laser instrument 7 to the short steel pipe 4, so that the zero scale line on the second scale lines 18 is on the same vertical line as the zero scale line on the first scale lines 9.

[0041] Meanwhile, a movable second engaging pull rod 19 and a rotatable second rotating gear rod 20 are installed in the inner cavity of the short steel pipe 4. One end of the second engaging pull rod 19 passes through one end of the short steel pipe 4, and the other end is drivingly connected to the second four-corner plate 10. Moreover, a second positioning plate 21 is fixed on the inner wall of the short steel pipe 4. The second rotating gear rod 20 is threadedly engaged with the second engaging pull rod 19, and one end passes through one end of the short steel pipe 4, and the other end is rotatably connected to the second positioning plate 21. By rotating the second rotating gear rod 20, the second engaging pull rod 19 is driven to move, so that the second four-corner plate 10 moves towards or away from the short steel pipe 4, and then the expanded metal sheet 1 is threadedly and fixedly connected to the four corner ends of the second four-corner plate 10. A tool such as a wrench is used to rotate the second rotating gear rod 20, thereby driving the second engaging pull rod 19 that is threadedly engaged with it to move, so that the second four-corner plate 10 moves towards or away from the short steel pipe 4.

[0042] It should be noted that the second engaging pull rod 19 is arranged along the axis direction of the short steel pipe 4, and the second rotating gear rod 20 is arranged along a direction parallel to the axis of the short steel pipe 4. Moreover, concave threads are provided on the outer wall of the second engaging pull rod 19, and convex threads are provided on the outer wall of the second rotating gear rod 20, and the concave threads are threadedly engaged with the convex threads.

[0043] Moreover, the second rotating gear rod 20 is arranged in the graduated short steel pipe 4, made of round steel, with concave threads at both ends and convex threads in the middle section, and both ends are placed on the fixed steel plate and can be freely rotated by an electric wrench. The second engaging pull rod 19 is arranged in the graduated short steel pipe 4, made of round steel, with concave threads matching those of the second rotating gear rod 20 at the end, one end is placed on the fixed steel plate, and one end is connected to the second four-corner plate 10.

[0044] A special horizontal steel pipe with scales is made according to the transverse distance of the double-row external scaffolding, the distance from the outer edge of the building, and the exposed length of the small cross-bar. The end of the steel pipe is provided with a first four-corner plate 8 and a second four-corner plate 10 that can be spirally translated and are made of four-way angle nails. The long steel pipe 3 with the first scale line 9 is horizontally fixed on the vertical pole of the external scaffolding, and a level bubble instrument 6 is used to check whether the long steel pipe 3 is fixed horizontally; the steel mesh 1 is placed on the first four-corner plate 8 at the end of the long steel pipe 3 for fixation, and an electric wrench is used to tighten it at the other end of the long steel pipe 3. The steel mesh 1 is firmly locked by the first four-corner plate 8. Click the laser control switch on the laser instrument 7 to turn on the laser, and check the levelness of the long steel pipe 3; rotate the limit nail 13 on the center of the rotation axis disc 12 of the long steel pipe 3 so that the center can rotate freely. When rotating the center, lower the limit nail 13 again so that the center of the rotation axis disc 12 rotates 90° and is just stuck by the blocking nail 14. At this time, the laser becomes vertical. According to the scale numbers of the laser and the first scale line 9, it can be checked whether the upper and lower long steel pipes 3 and short steel pipes 4 fix the steel mesh 1 on the same plane, and at the same time check whether the flatness of the outer surface of the steel mesh 1 is accurately controlled.

[0045] Since the steel mesh 1 is a rigid material, when installing the external scaffolding, it is easy to cause unevenness on the outer surface due to the unevenness of the external scaffolding. Therefore, this device uses the principle of rotating laser calibration to accurately adjust and position the steel mesh 1, solves the problem of uneven and unsightly outer surface caused by the unevenness of the external scaffolding, saves labor at the same time, is easy to operate, safe and environmentally friendly, can solve multiple problems at the same time, and is easy and convenient.

[0046] The working principle of this device is:

[0047] (1) Install the long steel pipe 3 with scales in the central axis area of the external scaffolding, use the level bubble instrument 6 to adjust the horizontal position of the long steel pipe 3, ensure that the distance between the steel mesh 1 and the external scaffolding is 20 cm, and then use fasteners for fixation after the bubble is centered;

[0048] (2) Start the laser instrument 7, turn on the rotatable limit nail 13, and through the 90-degree rotation of the rotation axis disc 12, emit laser light in turn from the four directions of up, down, left, and right. Combine the size of the steel mesh 1, and install the short steel pipes 4 with scales on the laser instrument 7 in turn from the farthest distance. After ensuring that the laser is projected on the unified position of the scale on the steel plate, use fasteners to fix the short steel pipes 4;

[0049] (3) Spray-paint advertisements, slogans, and patterns on the steel mesh 1 in advance, and make serial number markings for easy installation at specific positions;

[0050] (4) After the long steel pipes 3 and short steel pipes 4 of a two-row external scaffolding on a plane are installed and fixed, the four corners of the steel mesh 1 are fixed to the first four-corner plate 8 and the second four-corner plate 10. By using an electric wrench to rotate the first rotating gear rod 16 and the second rotating gear rod 20, the first engaging pull rod 15 and the second engaging pull rod 19 are pulled to ensure that the steel mesh 1 is tightly fixed to the first four-corner plate 8 and the second four-corner plate 10. And so on, the steel mesh 1 is installed layer by layer from bottom to top;

[0051] (5) Remove the steel mesh 1.

[0052] In summary, in the precise positioning device for the external scaffolding steel mesh 1 of this application, it is time-saving and labor-saving, safe and stable. Using this device, the external scaffolding steel mesh 1 can be precisely leveled and fixed with high quality, high efficiency, safety and beauty, thus solving the problem that the outer facade is uneven due to the unevenness of the external scaffolding during the installation of the steel mesh 1. At the same time, it saves labor, is easy to operate, safe and environmentally friendly, and can solve multiple problems at the same time, being easy and convenient. In addition, it can check the transverse distance of the external scaffolding and the distance from the building edge through the level bubble 6 and the laser instrument 7, and can also solve the problems of environmental protection, beauty and safety hazards existing in the external scaffolding dense mesh due to easy damage, and can be recycled repeatedly. This device can use the level bubble 6 to adjust the installation verticality and flatness of the long steel pipe 3 and the short steel pipe 4 to prepare for the precise measurement of the laser instrument 7; the laser instrument 7 is used in conjunction with the scale of the long steel pipe 3, and the rotating shaft disc 12 rotates 90 degrees through the rotation principle of the bearing, and the laser is emitted in turn from the four directions of up, down, left and right to ensure the unified coordination of the horizontal positions of all steel pipes, thus ensuring the flatness of the entire steel mesh 1; after the initial installation of the steel mesh 1, the steel mesh 1 is precisely fine-tuned using the principle of an automatic wrench to eliminate the dimensional errors caused by the production and handling of the steel mesh 1, and the steel mesh 1 is installed smoothly and beautifully with reduced gaps; using this device and installation method, it is ensured that the steel mesh 1 is assembled precisely and orderly, and advertisements, slogans and patterns can be pre-painted on the steel mesh 1 in blocks in advance, and then unifiedly installed and formed for publicity; in addition, the removal of the steel mesh 1 is very convenient and safe.

[0053] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. An accurate positioning device for the external frame steel mesh, characterized in that, The invention comprises a plurality of long steel pipes and short steel pipes which are arranged in parallel and alternately in sequence; the long steel pipe is arranged horizontally and detachably mounted on an external scaffold; a level bubble meter, a laser meter and a first quadrangular plate are installed in sequence and at intervals along the length direction of the long steel pipe; a first scale line arranged along the length direction is arranged on the outer side wall of the long steel pipe; the level bubble meter is installed on the outer side wall of the long steel pipe for detecting the horizontality of the long steel pipe; the laser meter is installed just above the zero scale line on the first scale line of the long steel pipe and can rotate along the outer peripheral wall of the long steel pipe, and The horizontality and verticality of the long steel pipe and the short steel pipe are detected by emitting laser; the first square plate is connected to one end of the long steel pipe so as to be movably close to or away from the long steel pipe; the short steel pipe is horizontally arranged and detachably mounted on the external scaffold, and a second square plate is mounted on one end of the short steel pipe so as to be movably close to or away from the short steel pipe; a rubber ring is provided on the long steel pipe, and the horizontal bubble meter is mounted on the rubber ring; the horizontal bubble meter is arranged on the long steel pipe in a direction parallel to the axis of the long steel pipe.

2. The accurate positioning device for the external frame steel mesh according to claim 1, characterized in that, A rotatable rotating shaft disk is sleeved on the long steel tube, and the rotating shaft disk is sleeved at the zero scale line on the first scale line of the long steel tube, and a limit pin is hinged on the outer wall; four stop pins are fixedly installed on the long steel tube at equal intervals in the circumferential direction, which are used to block or separate from the limit pins so that the rotating shaft disk can be limited or rotated.

3. The accurate positioning device for the external frame steel mesh according to claim 2, characterized in that, The shift pin is perpendicular to the outer wall of the long steel pipe.

4. The accurate positioning device for the external frame steel mesh according to claim 1, characterized in that, A movable first engaging rod and a rotatable first rotating gear rod are installed in the inner cavity of the long steel tube; one end of the first engaging rod passes through the other end of the long steel tube, and the other end is transmission-connected to the first square plate, which is used to drive the first square plate to move in the direction approaching or away from the long steel tube; a first positioning plate is fixed on the inner wall of the long steel tube; the first rotating gear rod is threadedly engaged with the first engaging rod, and one end passes through the other end of the long steel tube, and the other end is rotatably connected to the first positioning plate; the first engaging rod is driven to move by rotating the first rotating gear rod, so that the first square plate moves in the direction approaching or away from the long steel tube.

5. The accurate positioning device for the external frame steel mesh according to claim 4, characterized in that, The first engaging pull rod is arranged along the axial direction of the long steel pipe, and the first rotating gear rod is arranged along a direction parallel to the axial direction of the long steel pipe.

6. The accurate positioning device for the external frame steel mesh according to claim 1, characterized in that, The outer wall of the short steel pipe is provided with second scale lines arranged along the length direction, and the laser is emitted to the short steel pipe by the laser instrument so that the zero scale line on the second scale line is on the same vertical line as the zero scale line on the first scale line.

7. The accurate positioning device for the external frame steel mesh according to claim 6, characterized in that, A movable second engaging pull rod and a rotatable second rotating gear rod are installed in the inner cavity of the short steel pipe; one end of the second engaging pull rod passes through one end of the short steel pipe, and the other end is drivingly connected to the second four-corner plate; a second positioning plate is fixed on the inner wall of the short steel pipe; the second rotating gear rod is threadedly engaged with the second engaging pull rod, and one end passes through one end of the short steel pipe, and the other end is rotatably connected to the second positioning plate; by rotating the second rotating gear rod, the second engaging pull rod is driven to move, so that the second four-corner plate moves in a direction close to or away from the short steel pipe.

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