Integrated jacking construction device for large-span roof steel mesh framework in limited space

Abstract

The utility model belongs to the technical field of steel net rack construction, and particularly provides a limited space large-span roof steel net rack framework integrated jacking construction device which comprises a steel net rack body, a jacking system and two net rack supports, and the two net rack supports are connected with two bridge piers through concrete brackets. The steel net rack body moves close to a bridge deck beam under the action of the two jacking systems and is fixed with the net rack supports, the positioning system comprises laser transmitters and light activated switches, the two laser transmitters are horizontally mounted at the two ends of the steel net rack body, the two light activated switches are mounted on the two net rack supports, and the two laser transmitters are connected with the two light activated switches. The light activated switch is connected with a power circuit of the jacking system, and when laser emitted by the laser emitter makes contact with the light activated switch, the light activated switch is switched off, and the jacking system stops working. Through the arrangement of the jacking system, the lifting of the steel net rack body can be facilitated, in combination with the arrangement of the positioning system, the mounting position of the steel net rack body can be quickly positioned, and the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel grid construction, in particular to an integrated jacking construction device for a steel grid frame of a large-span roof in a confined space. Background Art

[0002] The steel structure grid is a spatial force-bearing system formed by connecting rods. It has a simple and beautiful shape, a light and strong structure, and is widely used in public buildings such as large-span spatial structures and curved roofs.

[0003] At present, the installation of steel grids includes the overall lifting installation method, which is to first assemble the grid into a whole on the ground, and then use lifting equipment to lift it as a whole to the designed position and fix it. Compared with the high-altitude assembly method, the overall lifting installation method reduces a lot of high-altitude operations, but it is limited by the size of the lifting equipment and site restrictions so that it cannot be used when the top space is limited. In addition, the overall lifting installation method requires multiple adjustments to the position during actual installation, and the installation efficiency is low. Utility Model Content

[0004] In view of the technical problems in the prior art, the utility model provides an integrated jacking construction device for a large-span roof steel grid frame in a confined space, comprising a steel grid frame body, two jacking systems and two grid frame supports, wherein a roofing system is installed on the steel grid frame body, the steel grid frame body is installed between two bridge piers and is located below the bridge deck beam, the two grid frame supports are respectively fixedly connected to the side walls of the two bridge piers through concrete corbels, the two jacking systems are symmetrically arranged between the two bridge piers, the steel grid frame body moves close to the bridge deck beam under the action of the two jacking systems, and is supported by the jacking frame, and is fixed to the grid frame supports after reaching the designed elevation, and also comprises a positioning system, the positioning system comprises a laser emitter and a photosensitive switch, the two laser emitters are horizontally installed at both ends of the steel grid frame body, the two photosensitive switches are installed on the two grid frame supports, the photosensitive switch is connected to the power circuit of the corresponding side jacking system, when the laser emitted by the laser emitter contacts the photosensitive switch, the photosensitive switch is disconnected, and the jacking system stops working.

[0005] Furthermore, the laser transmitter is installed in the middle of the steel grid body.

[0006] Furthermore, the positioning system also includes a support rod, a sleeve and a drive assembly. The two sleeves are detachably connected to the two ends of the steel grid body through connecting parts and are located below the laser transmitter. The drive assembly is installed in the sleeve and connected to the photosensitive switch. The support rod is slidably installed in the sleeve. When the photosensitive switch is disconnected, the end of the support rod close to the concrete corbel slides out of the sleeve and overlaps the concrete corbel under the drive of the drive assembly. When the photosensitive switch is closed, the end of the support rod close to the concrete corbel retracts into the sleeve.

[0007] Furthermore, the driving assembly includes a spring, a suction block and an electromagnet, a limit block is provided at one end of the sleeve close to the concrete corbel, a stop block is provided on the support rod, the spring is sleeved outside the support rod, and the two ends of the spring are fixedly connected with the limit block and the stop block respectively, the suction block is fixedly installed on the end of the support rod, the electromagnet is installed on the end of the sleeve away from the limit block through a bracket, and the electromagnet and the suction block are directly opposite, the photosensitive switch is connected to the control circuit of the electromagnet, and the suction force of the electromagnet and the suction block is greater than the elastic force of the spring.

[0008] Furthermore, a plurality of vertical threaded holes are provided at one end of the support rod close to the concrete corbel. The plurality of threaded holes are arranged at intervals along the length direction of the support rod. Adjustment bolts are threadedly connected to the inner threads of the threaded holes.

[0009] Furthermore, an adjusting block is rotatably mounted on the bottom of the adjusting bolt.

[0010] Beneficial effects:

[0011] 1. In the utility model, the setting of two jacking systems can facilitate the lifting of the steel grid body. Combined with the setting of the positioning system including the laser transmitter and the photosensitive switch, the installation position of the steel grid body can be quickly positioned to improve the installation efficiency. Specifically, the two jacking systems can ensure that the steel grid body will not be displaced in the horizontal direction during lifting. Combined with the setting of the laser transmitter and the photosensitive switch, the jacking system can be automatically controlled to stop working when the steel grid body reaches the installation height, ensuring that it is installed in place at one time.

[0012] 2. In the utility model, through the arrangement of the support rod, sleeve and driving assembly, after the steel grid body is installed in place, the driving assembly can be controlled by the photosensitive switch to work, and the support rod can be driven to slide out of the sleeve, so that the support rod is supported on the concrete corbel, thereby providing a certain support in the process of connecting and fixing the steel grid body and the grid support, and sharing the supporting force of the jacking system and the jacking frame; through the arrangement of the spring, suction block and electromagnet, the suction force of the electromagnet and the suction block and the elastic force of the spring can be used to quickly realize the sliding out or retraction of the support rod. Specifically, when the photosensitive switch is disconnected, the electromagnet loses its magnetism and separates from the suction block, the spring returns to its original length, and the support rod slides out of the sleeve under the elastic force of the spring. When the photosensitive switch is closed, the electromagnet obtains magnetism to overcome the elastic force of the spring and is attracted to the suction block, and the support rod is retracted into the sleeve.

[0013] 3. In the utility model, by adjusting the matching setting of the bolts and the threaded holes, the height between the support rod and the concrete corbel can be fine-tuned, which is convenient for the connection and fixation between the steel grid body and the grid support; combined with the setting of the adjustment block, the contact area between the adjustment bolt and the concrete corbel can be increased, thereby improving the stability of the support for the steel grid body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the overall installation structure when the steel grid body of the utility model is assembled on the ground;

[0016] Figure 2 This is a schematic diagram of the overall installation structure when the steel grid body of the utility model is lifted into place;

[0017] Figure 3 for Figure 2 Detailed structural diagram at A in the middle;

[0018] Figure 4 This is a schematic diagram of the installation structure when the support rod of the utility model slides out of the sleeve;

[0019] Figure 5 This is a schematic diagram of the installation structure when the support rod of the utility model is retracted into the sleeve.

[0020] Description of reference numerals:

[0021] 1. Steel grid body; 2. Lifting system; 3. Grid support; 4. Roof system; 5. Bridge pier; 6. Bridge beam; 7. Concrete corbel; 8. Positioning system; 81. Laser transmitter; 82. Photosensitive switch; 83. Support rod; 84. Casing; 9. Spring; 10. Suction block; 11. Electromagnet; 12. Limit block; 13. Stop block; 14. Threaded hole; 15. Adjusting bolt; 16. Adjusting block; 17. Lifting frame. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, 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 application 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 a limitation on the present application.

[0024] 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 at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0028] The utility model provides an integrated jacking construction device for a large-span roof steel grid frame in a confined space, such as Figures 1 to 3 As shown, it includes a steel grid body 1, two jacking systems 2 and two grid supports 3. The steel grid body 1 is installed with a roof system 4. The steel grid body 1 is installed between two bridge piers 5 and is located below the bridge deck beam 6. The two grid supports 3 are fixedly connected to the side walls of the two bridge piers 5 through concrete brackets 7. The two jacking systems 2 are symmetrically arranged between the two bridge piers 5. The steel grid body 1 moves close to the bridge deck beam 6 under the action of the two jacking systems 2 and is supported by a jacking frame 17. After reaching the designed elevation, it is fixed to the grid support 3. The jacking system 2 is mainly composed of an upper support frame, a lower support frame, and a jacking frame. The steel grid body 1 is composed of a device and a computer synchronous control system. During the rising process of the steel grid body 1, the lifting frame 17 plays a supporting role. It also includes a positioning system 8, and the positioning system 8 includes a laser emitter 81 and a photosensitive switch 82. The two laser emitters 81 are horizontally installed at the two ends of the steel grid body 1 and are located in the middle of the steel grid body 1. The two photosensitive switches 82 are installed on the two grid supports 3. The photosensitive switches 82 are connected to the power circuit of the corresponding side lifting system 2. When the laser emitted by the laser emitter 81 contacts the photosensitive switch 82, the photosensitive switch 82 is disconnected and the lifting system 2 stops working.

[0029] In this embodiment, the two jacking systems 2 are provided to facilitate the lifting of the steel grid body 1. Combined with the positioning system 8 including the laser emitter 81 and the photosensitive switch 82, the installation position of the steel grid body 1 can be quickly located to improve the installation efficiency. Specifically, the two jacking systems 2 can ensure that the steel grid body 1 will not be displaced in the horizontal direction during lifting. Combined with the settings of the laser emitter 81 and the photosensitive switch 82, the jacking system 2 can be automatically controlled to stop working when the steel grid body 1 reaches the installation height, ensuring that it is installed in place in one go.

[0030] In the present invention, preferably, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the positioning system 8 also includes a support rod 83, a sleeve 84 and a driving assembly. The two sleeves 84 are detachably connected to the two ends of the steel grid body 1 through a connecting piece and are located below the laser emitter 81. The driving assembly is installed in the sleeve 84 and connected to the photosensitive switch 82. The support rod 83 is slidably installed in the sleeve 84. When the photosensitive switch 82 is disconnected, the end of the support rod 83 close to the concrete corbel 7 slides out of the sleeve 84 driven by the driving assembly and overlaps with the concrete corbel 7. When the photosensitive switch 82 is closed, the end of the support rod 83 close to the concrete corbel 7 retracts into the sleeve 84. The driving assembly includes a spring 9, a suction block 10 and an electromagnet 11. A limit block 12 is provided at one end of the sleeve 84 close to the concrete corbel 7, and a stop block 13 is provided on the support rod 83. The spring 9 is sleeved outside the support rod 83, and the two ends of the spring 9 are fixedly connected with the limit block 12 and the stop block 13 respectively. The suction block 10 is fixedly installed at the end of the support rod 83. The electromagnet 11 is installed at the end of the sleeve 84 away from the limit block 12 through a bracket, and the electromagnet 11 and the suction block 10 are directly opposite. The photosensitive switch 82 is connected to the control circuit of the electromagnet 11, and the suction force of the electromagnet 11 and the suction block 10 is greater than the elastic force of the spring 9.

[0031] In this embodiment, by setting the support rod 83, the sleeve 84 and the driving assembly, after the steel grid body 1 is installed in place, the photosensitive switch 82 can be used to control the operation of the driving assembly, and drive the support rod 83 to slide out of the sleeve 84, so that the support rod 83 is supported on the concrete corbel 7, thereby providing certain support during the connection and fixation process between the steel grid body 1 and the grid support 3, and sharing the supporting force of the jacking system 2 and the jacking frame 17; by setting the spring 9, the suction block 10 and the electromagnet 11, the suction force of the electromagnet 11 and the suction block 10 and the elastic force of the spring 9 can be used to quickly realize the sliding out or retraction of the support rod 83. Specifically, when the photosensitive switch 82 is disconnected, the electromagnet 11 loses its magnetism and separates from the suction block 10, the spring 9 restores its original length, and the support rod 83 slides out of the sleeve 84 under the elastic force of the spring 9. When the photosensitive switch 82 is closed, the electromagnet 11 obtains magnetism to overcome the elastic force of the spring 9 and is attracted to the suction block 10, and the support rod 83 is retracted into the sleeve 84.

[0032] In the present invention, preferably, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the support rod 83 is provided with a plurality of vertical threaded holes 14 at one end close to the concrete corbel 7. The plurality of threaded holes 14 are arranged at intervals along the length direction of the support rod 83. The threaded holes 14 are internally threadedly connected with adjusting bolts 15, which can be removed when not in use. An adjusting block 16 is rotatably installed at the bottom of the adjusting bolt 15.

[0033] In this embodiment, by adjusting the matching setting of the bolt 15 and the threaded hole 14, the height between the support rod 83 and the concrete corbel 7 can be fine-tuned, which is convenient for the connection and fixation between the steel grid body 1 and the grid support 3; combined with the setting of the adjustment block 16, the contact area between the adjustment bolt 15 and the concrete corbel 7 can be increased, thereby improving the stability of the support for the steel grid body 1.

[0034] like Figures 1 to 5 As shown, the specific construction steps include:

[0035] 1. First, measure and locate the construction site, use the total station to lay out the positive projection line of the steel grid body 1, and set the assembly frame just below the lower chord welding ball.

[0036] 2. Assemble the steel grid body 1 on the ground, and install two laser emitters 81 at both ends of the steel grid body 1 respectively, and ensure that the emission ports of the laser emitters 81 are horizontally facing the bridge pier 5.

[0037] 3. Install the roofing system 4 on the steel grid body 1.

[0038] 4. Install the grid support 3 on the concrete corbels 7 on the opposite side walls of the two bridge piers 5, and install the photosensitive switch 82 on the grid support 3, ensuring that the photosensitive switch 82 and the emission port of the laser emitter 81 are in the same vertical plane.

[0039] 5. The jacking device lifts the steel grid body 1 and the roof system 4 as a whole through the jacking operation and in combination with the jacking frame 17 until the photosensitive switch 82 is disconnected and the jacking device stops working. At this time, the steel grid body 1 reaches the designed elevation.

[0040] 6. Assemble, connect and weld the steel grid body 1 and the grid support 3, and organize the work of adding rods to the steel grid body 1. During this process, the installed support rods 83, sleeves 84 and drive components including springs 9, suction blocks 10 and electromagnets 11 can be used to provide auxiliary support for the steel grid body 1 and the roof system 4, share the supporting force of the jacking system 2 and the jacking frame 17, and improve safety performance.

[0041] 7. After the installation of the supplementary rods of the steel grid body 1 is completed and the inspection and acceptance are qualified, the unloading construction is carried out and the roof jacking is completed.

[0042] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A confined space large-span roof steel grid frame integrated jacking construction device, comprising a steel grid body (1), two jacking systems (2) and two grid supports (3), wherein a roof system (4) is installed on the steel grid body (1), the steel grid body (1) is installed between two bridge piers (5) and is located below a bridge deck beam (6), the two grid supports (3) are respectively fixedly connected to the side walls of the two bridge piers (5) through concrete brackets (7), the two jacking systems (2) are symmetrically arranged between the two bridge piers (5), the steel grid body (1) moves close to the bridge deck beam (6) under the action of the two jacking systems (2), and is supported by a jacking frame (17), and is fixed to the grid supports (3) after reaching the designed elevation, It is characterized in that The invention also comprises a positioning system (8), wherein the positioning system (8) comprises a laser emitter (81) and a photosensitive switch (82), wherein two laser emitters (81) are horizontally mounted at two ends of the steel grid body (1), and two photosensitive switches (82) are mounted on two grid supports (3), and the photosensitive switches (82) are connected to the power supply circuit of the corresponding side lifting system (2). When the laser emitted by the laser emitter (81) contacts the photosensitive switch (82), the photosensitive switch (82) is disconnected and the lifting system (2) stops working.

2. According to claim 1, a confined space large-span roof steel grid frame integrated jacking construction device, It is characterized in that The laser emitter (81) is installed in the middle of the steel grid body (1).

3. A confined space large-span roof steel grid frame integrated jacking construction device according to claim 1 or 2, It is characterized in that The positioning system (8) further comprises a support rod (83), a sleeve (84) and a drive assembly. The two sleeves (84) are detachably connected to the two ends of the steel grid body (1) through a connecting piece and are located below the laser emitter (81). The drive assembly is installed in the sleeve (84) and is connected to the photosensitive switch (82). The support rod (83) is slidably installed in the sleeve (84). When the photosensitive switch (82) is disconnected, the end of the support rod (83) close to the concrete corbel (7) slides out of the sleeve (84) driven by the drive assembly and overlaps with the concrete corbel (7). When the photosensitive switch (82) is closed, the end of the support rod (83) close to the concrete corbel (7) retracts into the sleeve (84).

4. According to claim 3, a confined space large-span roof steel grid frame integrated jacking construction device, It is characterized in that The driving assembly comprises a spring (9), a suction block (10) and an electromagnet (11); a limit block (12) is provided at one end of the sleeve (84) close to the concrete corbel (7); a stop block (13) is provided on the support rod (83); the spring (9) is sleeved outside the support rod (83); and the two ends of the spring (9) are fixedly connected to the limit block (12) and the stop block (13); the suction block (10) is fixedly mounted on the end of the support rod (83); the electromagnet (11) is mounted on the end of the sleeve (84) away from the limit block (12) through a bracket; the electromagnet (11) and the suction block (10) are directly opposite; the photosensitive switch (82) is connected to the control circuit of the electromagnet (11); and the suction force between the electromagnet (11) and the suction block (10) is greater than the elastic force of the spring (9).

5. According to claim 4, a confined space large-span roof steel grid frame integrated jacking construction device, It is characterized in that A plurality of vertical threaded holes (14) are provided at one end of the support rod (83) close to the concrete corbel (7). The plurality of threaded holes (14) are arranged at intervals along the length direction of the support rod (83). The threaded holes (14) are internally threadedly connected with adjustment bolts (15).

6. The integrated jacking construction device for a confined space large-span roof steel grid frame according to claim 5, It is characterized in that An adjusting block (16) is rotatably mounted on the bottom of the adjusting bolt (15).

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