A maintenance and reinforcement device for grid rods

Abstract

The present invention discloses a maintenance and reinforcement device for a grid rod, comprising a fixed base I, a fixed base II, a maintenance and reinforcement rod unit and a node ball fixed clamp; a plurality of maintenance and reinforcement rod units are provided and are located between the fixed base I and the fixed base II; the maintenance and reinforcement rod unit comprises a fixed end screw, a force end screw and an unloading force internal thread sleeve; one end of the fixed end screw is installed on the edge of the fixed base I, and the other end is connected to the unloading force internal thread sleeve; one end of the force end screw is installed on the edge of the fixed base II, and the other end is movably installed on the opposite end of the unloading force internal thread sleeve connected to the fixed end screw. The grid rod maintenance and reinforcement device provided by the present invention can, on the one hand, make the stress distribution of the entire grid equal to the original design theoretical value, unload a single rod, and carry out disassembly and replacement construction; on the other hand, it can be used as a reinforcement measure for grid rods, and is permanently placed on the rods that need to be reinforced to play a reinforcement role.

Description

Technical Field

[0001] The invention relates to a maintenance and reinforcement device, in particular to a grid rod maintenance and reinforcement device, and belongs to the field of building steel structure grid rod devices. Background Art

[0002] Space grid structures have been widely used in public buildings such as stadiums, railway stations, bus stations, exhibition centers, gas stations, etc. in the past two decades due to their flexible shapes, light weight, quick and simple construction and installation. After years of use, such buildings have problems in the early design, construction, and later use and maintenance, which lead to safety hazards caused by insufficient bearing capacity of some structural components, so they need to be replaced.

[0003] At present, when the grid is installed or in use, if there are rods that need to be replaced, most construction units carry out barbaric construction, directly dismantling the rods before installation. Although in most cases the grid is a multi-hyperstatic structure, the stress of the rods will still be redistributed, and other rods may have excessive stress, or even collapse as a whole. If a load-bearing scaffold is set up for partial or overall unloading, the cost of measures will be a huge expense.

[0004] The Chinese patent "A replacement device for a tension rod of a grid" (publication number: CN205617831U) discloses: a replacement device for a tension rod of a grid, comprising a replacement head for fixing the tension rod to be replaced, a tension rod arranged between the replacement heads, and a tension sensor fixed on the tension rod; the replacement head comprises a replacement head 1 and a replacement head 2 matched with the replacement head 1, the replacement head 1 comprises an upper anchor head 1 and a lower anchor head 1, the upper and lower anchor heads 1 are fastened by a positioning screw and a tension anchor screw, the replacement head 2 comprises an upper anchor head 2 and a lower anchor head 2, the upper and lower anchor heads 2 are fastened by a positioning screw and a tension anchor screw; an upper tension rod is arranged between the upper anchor head 1 and the upper anchor head 2, the upper tension rod is composed of an upper tension rod 1 and an upper tension rod 2, and a tension sensor is arranged at the connection between the upper tension rod 1 and the upper tension rod 2; a lower tension rod is arranged between the lower anchor head 1 and the lower anchor head 2, the lower tension rod is composed of a lower tension rod 1 and a lower tension rod 2, and a tension sensor is arranged at the connection between the lower tension rod 1 and the lower tension rod 2.

[0005] However, the above patent has the following defects: 1. The device mainly considers the use of the rods in the original structure as tension rods in theory. However, once the original structure is completed, the internal stress will be redistributed, and it is difficult to accurately determine whether the force is tension or compression, so there is a great risk in using it. 2. There are fatal defects in the use of the device. When the force of a single rod unit of the grid changes, the force of the adjacent rods will also change to a certain extent, and even the force of the entire grid will change to a certain extent. There is no way to overcome the sudden change in overall stress after the actual compression rod is unloaded, and it is completely impossible to predict and avoid the situation where the adjacent rods are damaged by excessive force. 3. The device only has two upper and lower pull rods. The slenderness ratio will definitely exceed the standard during the structural calculation process, and the structure is likely to become unstable. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a maintenance and reinforcement device for a truss rod. The device has a simple structure, is easy to use, and is applicable to both tension rods and compression rods. On the one hand, it can make the stress distribution of the entire truss equal to the original design theoretical value, unload a single rod, and carry out disassembly and replacement construction; on the other hand, it can be used as a reinforcement measure for the truss rods and be permanently placed on the rods that need to be reinforced to play a reinforcement role.

[0007] In order to achieve the above objectives, the technical solution adopted by the present invention is:

[0008] A grid rod maintenance and reinforcement device, comprising a fixed base I, a fixed base II, a maintenance and reinforcement rod unit and a node ball fixing hoop;

[0009] The maintenance reinforcement rod unit is provided in plurality and is located between the fixed base I and the fixed base II;

[0010] The maintenance reinforcement rod unit includes a fixed end screw, a force-applying end screw and an unloading force-applying internal threaded sleeve; one end of the fixed end screw is installed on the edge of the fixed base I, and the other end is connected to the unloading force-applying internal threaded sleeve; one end of the force-applying end screw is installed on the edge of the fixed base II, and the other end is movably installed on the opposite end of the unloading force-applying internal threaded sleeve connected to the fixed end screw;

[0011] The node ball fixing hoop is installed at the outer ends of the fixing base I and the fixing base II.

[0012] In the present invention, fixed base I and fixed base II are transmission bodies for the force of the maintenance and reinforcement rod unit. The maintenance and reinforcement rod unit is used to fix the grid rods or replace the grid rods. The node ball fixing clamp is used to fix the grid node ball. Both the tensile and compressive grid node balls can be fixed, so that the maintenance and reinforcement device of the present invention can be applicable to both tensile and compressive grid rods.

[0013] Furthermore, a digital force measuring ring is provided on the unloading force-adding internal threaded sleeve to play a safety protection role, so that the user can know the magnitude of the force borne by the maintenance and reinforcement rod unit, thereby facilitating the reinforcement or replacement of the rod and making the reinforcement or replacement of the rod safer.

[0014] Furthermore, the force-adding end screw is a ball screw, and the screw nut of the ball screw is radially fixed on the unloading force-adding internal threaded sleeve and rotates circumferentially. The user can control the left and right movement of the maintenance reinforcement rod unit by rotating the screw nut of the ball screw, and control it to press outward or pull inward the grid node ball in the node ball fixing clamp, thereby fixing the grid rod or replacing the grid rod.

[0015] Furthermore, a plurality of detachable stiffening ribs are equidistantly arranged between two adjacent maintenance and reinforcement rod units, and the stiffening ribs are mounted on the maintenance and reinforcement rod units through stiffening rib fixing clamps. By providing stiffening ribs, adjacent maintenance and reinforcement rod units are fixed, thereby improving the stability and torsion resistance of the maintenance and reinforcement rod units.

[0016] Furthermore, a disassembly opening I is provided between two adjacent maintenance reinforcement rod units near the end of the fixed base I; a disassembly opening II is provided between two adjacent maintenance reinforcement rod units away from the disassembly opening I near the end of the fixed base II. The disassembly opening I and the disassembly opening II are used for replacing the grid rods. After the grid rods transfer all the force to the maintenance reinforcement device, the grid rods are tilted up, the grid rods are disassembled from the disassembly opening I and the disassembly opening II, and then new grid rods are replaced, which facilitates the disassembly and replacement of the grid rods.

[0017] Furthermore, the fixed end screw rod and the force end screw rod are respectively threadedly connected to the fixed base I and the fixed base II, which is convenient for installation and disassembly.

[0018] Furthermore, the fixed base I and the fixed base II each include an upper base and a lower base, and the upper base and the lower base are connected by bolts. The upper base and the lower base connected by bolts are provided to facilitate installation and removal of the maintenance reinforcement device on the grid unit.

[0019] Furthermore, the upper base and the lower base are both provided with a semi-arc groove and a semi-grid bolt through hole connected to the base. After the upper base and the lower base are connected, the two semi-arc grooves form an arc groove, and the two semi-grid bolt through holes form a grid bolt through hole, so as to facilitate the installation of the grid and the transfer of the force on the grid rods.

[0020] Furthermore, the fixed end of the node ball fixing hoop is installed on the fixed base I or the fixed base II by bolts, and the movable end is connected by bolts; so as to hold the grid node ball, apply pressure or tension to the grid node ball, fix the grid node ball, and then fix the grid. The size of the node ball fixing hoop can be made into node ball fixing hoops of different specifications according to the size and position of the grid node ball.

[0021] Furthermore, there are four maintenance reinforcement rod units evenly arranged, and at this time, the cross-sections of the fixed base I and the fixed base II are square; when the outer diameter of the maintenance reinforcement rod unit is greater than or equal to Ф140mm, there are six maintenance reinforcement rod units evenly arranged, and at this time, the cross-sections of the fixed base I and the fixed base II are regular hexagons.

[0022] Beneficial effects of the present invention:

[0023] The grid rod maintenance and reinforcement device provided by the present invention is applicable to both tension rods and compression rods. On the one hand, it can make the stress distribution of the entire grid equal to the original design theoretical value, unload a single rod, and carry out disassembly and replacement construction; on the other hand, it can be used as a grid rod reinforcement measure and be permanently placed on the rod that needs to be reinforced to play a reinforcement role.

[0024] The grid rod maintenance and reinforcement device provided by the present invention has a simple structure and is easy to use. It is fixed on the grid rods, which enhances the overall strength and stability of the grid, reduces construction costs, and increases the service life of the original grid rods. When used as a replacement, it avoids safety accidents caused by damage to the original grid rods, thereby increasing the safety of the grid structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A top view of the present invention;

[0026] Figure 2 A bottom view of the present invention;

[0027] Figure 3 is a schematic diagram of a fixed base of the present invention;

[0028] Figure 4 It is a schematic diagram of the upper base or the lower base of the present invention;

[0029] Figure 5 A schematic diagram of a grid unit that needs to be reinforced in the present invention;

[0030] Figure 6 A schematic diagram of the present invention installed on a grid unit that needs to be reinforced;

[0031] In the figure: 01, grid rod; 02, grid node ball; 03, grid rod cone head; 04, grid high-strength bolt; 1, fixed base I; 2, fixed base II; 3, reinforcement rod unit; 31, fixed end screw; 32, force end screw; 33, unloading force internal thread sleeve; 34, digital display force measuring ring; 35, screw nut; 36, stiffening rib; 37, stiffening rib fixing clamp; 38, disassembly port I; 39, disassembly port II; 4, node ball fixing clamp; 5, upper base; 6, lower base; 7, semi-arc groove; 8, half grid bolt through hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example 1

[0035] A grid rod maintenance and reinforcement device, such as Figure 1-4 As shown, it includes a fixed base Ⅰ1, a fixed base Ⅱ2, a maintenance reinforcement rod unit 3 and a node ball fixed clamp 4;

[0036] The maintenance reinforcement rod unit 3 is provided in plurality and is located between the fixed base Ⅰ1 and the fixed base Ⅱ2;

[0037] The maintenance reinforcement rod unit 3 includes a fixed end screw 31, a force end screw 32 and an unloading force internal threaded sleeve 33; one end of the fixed end screw 31 is installed on the edge of the fixed base Ⅰ1, and the other end is connected to the unloading force internal threaded sleeve 33; one end of the force end screw 32 is installed on the edge of the fixed base Ⅱ2, and the other end is movably installed on the opposite end of the unloading force internal threaded sleeve 33 connected to the fixed end screw 31;

[0038] The node ball fixing hoop 4 is installed on the outer ends of the fixing base Ⅰ1 and the fixing base Ⅱ2.

[0039] The grid unit reinforced by the present invention is as follows Figure 5 As shown, it includes grid node balls 02 at both ends, a grid rod 01 in the middle, and a grid rod cone head 03 and a grid high-strength bolt 04 connecting the grid node balls 02 and the grid rod 01 in the middle.

[0040] When installing the maintenance and reinforcement device, install the maintenance and reinforcement device and the grid unit together on the grid: first install the fixed base and the node ball fixing clamp 4 at both ends, then install the middle maintenance and reinforcement rod unit 3, then install the grid node ball 02 of the grid unit in the node ball fixing clamp 4, and finally install the grid rod 01 of the grid unit.

[0041] like Figure 6 As shown, when fixing the grid rod 01, the maintenance reinforcement rod unit 3 is operated to move it inward or outward, and the maintenance reinforcement rod unit 3 transmits force to the fixed base and the node ball fixing clamp 4 in turn, and the node ball fixing clamp 4 squeezes outward or pulls inward the grid node ball 02 to hold the grid node ball 02. The maintenance reinforcement device bears part of the tension or pressure of the original grid rod 01, which increases the service life of the original grid rod 01. The maintenance reinforcement device is permanently placed on the grid to play a role in reinforcing the grid. When replacing the grid rod, the maintenance reinforcement rod unit 3 is also operated to transfer all the force on the grid rod 01 to the maintenance reinforcement device, and then the grid rod is replaced.

[0042] Example 2

[0043] This embodiment is further improved on the basis of embodiment 1, and a digital force ring 34 is provided on the unloading force-adding internal threaded sleeve 33. In specific use, by observing the magnitude of the force displayed by the digital force ring 34, the user can know the magnitude of the force borne by the maintenance and reinforcement rod unit, thereby facilitating reinforcement or replacement of the rod.

[0044] Example 3

[0045] This embodiment is further improved on the basis of any one of the embodiments 1-2, the force-adding end screw 32 is a ball screw, and the screw nut 35 of the ball screw is radially fixed on the unloading force-adding internal thread sleeve 33 and rotates circumferentially. Specifically, in this embodiment, the outer wall of the unloading force-adding internal thread sleeve 33 is provided with a bolt hole, and the side wall of the lower end of the screw nut 35 is provided with an annular groove. The screw nut 35 is sleeved on the unloading force-adding internal thread sleeve 33, and the limit bolt passes through the bolt hole and is embedded in the annular groove, so that the screw nut 35 is radially fixed and rotates circumferentially.

[0046] During specific use, the unloading force-adding internal threaded sleeve 33 and the screw of the ball screw are fixed, and then the screw nut 35 of the ball screw is rotated to control the left and right movement of the ball screw, that is, to control the left and right movement of the maintenance reinforcement rod unit 3, and control it to press outward or pull inward the grid node ball 02 in the node ball fixing clamp 4, that is, indirectly bear part of the tension or pressure of the grid node ball 02 borne by the grid rod 01, or all of the tension or pressure, so as to fix the grid rod or replace the grid rod 01.

[0047] Example 4

[0048] This embodiment is further improved on the basis of any one of the embodiments 1-3, and a plurality of detachable stiffening ribs 36 are equidistantly arranged between two adjacent maintenance and reinforcement rod units 3, and the stiffening ribs 36 are installed on the maintenance and reinforcement rod units 3 through stiffening rib fixing hoops 37. When in use, the adjacent maintenance and reinforcement rod units 3 are fixed by the stiffening ribs 36, thereby improving the stability and torsional resistance of the maintenance and reinforcement rod units 3.

[0049] Example 5

[0050] This embodiment is further improved on the basis of the embodiment 4, and a disassembly opening I38 is provided between two adjacent maintenance reinforcement rod units 3 near the end of the fixed base I1; a disassembly opening II39 is provided between two adjacent maintenance reinforcement rod units 3 away from the disassembly opening I38 near the end of the fixed base II2. When in use, the disassembly opening I38 and the disassembly opening II39 are used to replace the grid rod 01. After the grid rod transfers all the force to the maintenance reinforcement device, the grid rod 01 is tilted, and the grid rod 01 is disassembled from the disassembly opening I38 and the disassembly opening II39, and then a new grid rod 01 is replaced.

[0051] Example 6

[0052] This embodiment is a further improvement on the basis of any one of the embodiments 1-5, the fixed end screw rod 31 and the force end screw rod 32 are respectively threadedly connected to the fixed base Ⅰ1 and the fixed base Ⅱ2. When in use, the threaded connection facilitates installation and disassembly.

[0053] Example 7

[0054] This embodiment is further improved on the basis of any one of the embodiments 1-6, and the fixed base Ⅰ1 and the fixed base Ⅱ2 both include an upper base 5 and a lower base 6, and the upper base 5 and the lower base 6 are connected by bolts. When in use, the upper base 5 and the lower base 6 are connected by bolts, so that the present invention can be installed on the grid unit, and after the grid rod 01 is replaced, the present invention can be removed from the grid unit.

[0055] Example 8

[0056] This embodiment is further improved on the basis of embodiment 7, and a semi-arc groove 7 and a semi-grid bolt through hole 8 connected to the base are provided on the upper base 5 and the lower base 6. When in use, the two semi-arc grooves 7 form an arc groove, and the two semi-grid bolt through holes 8 form a grid bolt through hole, so as to facilitate the installation of the grid and the transfer of the force applied to the grid.

[0057] Example 9

[0058] This embodiment is further improved on the basis of any one of the embodiments 1-8. The node ball fixing hoop 4 is a spherical hoop pre-made according to the specifications of the grid node ball 02 and corresponding to the size thereof. The fixed end of the node ball fixing hoop 4 is installed on the fixed base Ⅰ1 or the fixed base Ⅱ2 by bolts, and the movable end is connected by bolts. When in use, the node ball fixing hoop 4 is convenient for holding the grid node ball 02, applying pressure or tension to the grid node ball 02, and fixing the grid node ball 02, so that the present invention is applicable to both tension and compression conditions.

[0059] Example 10

[0060] This embodiment is a further improvement on the basis of any one of Embodiments 1-9, in which four maintenance reinforcement rod units 3 are evenly arranged, and the cross-sections of the fixed base Ⅰ1 and the fixed base Ⅱ2 are square.

[0061] In order to better understand the present invention, a complete description of the present invention is given below:

[0062] When fixing the grid rod 01, fix the unloading force-adding internal threaded sleeve 33 and the screw of the ball screw, and then rotate the screw nut 35 of the ball screw to control the left and right movement of the ball screw, that is, control the left and right movement of the maintenance reinforcement rod unit 3, and control it to press outward or pull inward the grid node ball 02 in the node ball fixing clamp 4. The present invention indirectly bears a part of the force of the grid node ball 02 borne by the grid rod 01, plays the role of reinforcing the grid, and increases the service life of the original grid rod 01.

[0063] When replacing the grid rod 01, fix the unloading force-adding internal threaded sleeve 33 and the screw of the ball screw, then rotate the screw nut 35 of the ball screw, control the ball screw to move to the right, and the fixed end screw 31 to move to the left, that is, control the maintenance reinforcement rod unit 3 to press the node ball 02 in the node ball fixing clamp 4 outward, and transfer the force on the grid rod 01 to the maintenance reinforcement device. After rotating a certain angle, all the force on the grid rod 01 is transferred to the maintenance reinforcement device, remove the grid high-strength bolts 04, tilt the grid rod 01, and remove the grid rod 01 from the disassembly port I 38 and the disassembly port II 39, and then replace the new grid rod 01.

[0064] After replacing the new grid rod 01, the maintenance and reinforcement device needs to be removed from the grid unit. By rotating the screw nut 35 of the ball screw, the force on the maintenance and reinforcement device is gradually transferred to the new grid rod 01; after the transfer, the node ball fixing clamp 4 is released, and the bolts of the upper base 5 and the lower base 6 are removed to disassemble the fixed base Ⅰ1 and the fixed base Ⅱ2. After disassembly, the maintenance and reinforcement device is removed from the grid unit.

[0065] The patent application adopts a node ball fixing clamp 4 installed at the outer ends of the fixed base Ⅰ1 and the fixed base Ⅱ2 to constrain the grid node balls 02 at both ends of the target grid rod 01. The constraints in the tension and compression directions can satisfy the use of the tension grid rod 01 and the compression grid rod 01. In addition, the application adopts 4 reinforcement rod units 3 (when the outer diameter of the maintenance reinforcement rod unit specification is greater than or equal to Ф140mm, the maintenance reinforcement rod units are evenly arranged with six, and the cross-section of the fixed base Ⅰ and the fixed base Ⅱ is a regular hexagon at this time), and the adjacent maintenance reinforcement rod units 3 are fixed by setting stiffening ribs 36 to improve the stability and torsion resistance of the maintenance reinforcement rod units 3. During the structural calculation, the slenderness ratio of a single reinforcement rod unit can be avoided to be independently verified, so that all reinforcement rod units are subjected to force as a whole, so that the structural verification of the strength and stability of the reinforcement rod units meets the specifications at the same time.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A grid rod maintenance and reinforcement device, Features: It comprises a fixed base I (1), a fixed base II (2), a maintenance reinforcement rod unit (3) and a node ball fixing hoop (4); The maintenance reinforcement rod unit (3) is provided in plurality and is located between the fixed base I (1) and the fixed base II (2); The maintenance reinforcement rod unit (3) comprises a fixed end screw (31), a force-applying end screw (32) and an unloading force-applying internal threaded sleeve (33); one end of the fixed end screw (31) is mounted on the edge of the fixed base I (1), and the other end is connected to the unloading force-applying internal threaded sleeve (33); one end of the force-applying end screw (32) is mounted on the edge of the fixed base II (2), and the other end is movably mounted on the opposite end of the unloading force-applying internal threaded sleeve (33) connected to the fixed end screw (31); The node ball fixing hoop (4) is installed on the outer ends of the fixing base I (1) and the fixing base II (2); A digital force measuring ring (34) is provided on the unloading force-adding internal threaded sleeve (33); The force-applying end screw (32) is a ball screw, and the screw nut (35) of the ball screw is radially fixed on the unloading force-applying internal thread sleeve (33) and rotates circumferentially.

2. A grid rod maintenance and reinforcement device according to claim 1, Features: A plurality of stiffening ribs (36) are equidistantly arranged between two adjacent maintenance and reinforcement rod units (3), and the stiffening ribs (36) are mounted on the maintenance and reinforcement rod units (3) via stiffening rib fixing hoops (37).

3. A grid rod maintenance and reinforcement device according to claim 2, Features: A disassembly opening I (38) is provided between two adjacent maintenance reinforcement rod units (3) near the end of the fixed base I (1); and a disassembly opening II (39) is provided between two adjacent maintenance reinforcement rod units (3) away from the disassembly opening I (38) near the end of the fixed base II (2).

4. A grid rod maintenance and reinforcement device according to claim 1, Features: The fixed end screw rod (31) and the force end screw rod (32) are respectively threadedly connected to the fixed base I (1) and the fixed base II (2).

5. A grid rod maintenance and reinforcement device according to claim 1, Features: The fixed base I (1) and the fixed base II (2) both comprise an upper base (5) and a lower base (6), and the upper base (5) and the lower base (6) are connected by bolts.

6. A grid rod maintenance and reinforcement device according to claim 5, Features: The upper base (5) and the lower base (6) are both provided with a semi-arc groove (7) and a semi-grid bolt through hole (8) communicating with the base.

7. A grid rod maintenance and reinforcement device according to claim 1, Features: The fixed end of the node ball fixing hoop (4) is mounted on the fixing base I (1) or the fixing base II (2) by means of bolts, and the movable end is connected by means of bolts.

8. A grid rod maintenance and reinforcement device according to claim 1, Features: The maintenance reinforcement rod units (3) are evenly arranged in four or six shapes, and the cross-sections of the fixed base I (1) and the fixed base II (2) are square or regular hexagonal.

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