Extensible assembly type steel structure for lightning protection of ancient pagoda

Abstract

The invention relates to the technical field of lightning protection devices, in particular to an extensible assembly type steel structure for ancient pagoda lightning protection, which comprises a bottom box and further comprises a shear fork frame, the shear fork frame is eccentrically arranged on the bottom box, the shear fork frame is of an arc-shaped structure when stretching out and drawing back, and a hydraulic cylinder for driving the shear fork frame to stretch out and draw back is arranged in the bottom box. According to the extensible assembly type steel structure for anti-thunder protection of the ancient tower, the shear shank is eccentrically connected, under the action of the hydraulic cylinder, lateral curve extension of the shear shank can be achieved, when the shear shank extends to the maximum degree, the top ejector rod is in a vertical state and serves as a lightning rod, the ancient tower is prevented from being struck by lightning, and the service life of the ancient tower is prolonged. The defect that the original structure and appearance of the ancient tower are possibly damaged due to the fact that existing lightning protection measures need to be arranged on the tower body foundation is overcome, instant judgment can be conducted according to weather conditions, flexibility is high, and the defect that the existing lightning protection measures cannot be dismantled once being arranged is overcome.

Description

Technical Field

[0001] The invention relates to the technical field of lightning protection devices, and in particular to a stretchable assembled steel structure for lightning protection of ancient towers. Background Art

[0002] Ancient pagodas are relatively tall and often located in open or high places. They lack effective lightning protection facilities, which makes them more susceptible to lightning strikes during thunderstorms. For example, in 1981, the thousand-year-old pagoda of Famen Temple in Shaanxi was struck by lightning. In 2009, the Da'an Temple Pagoda in Yiwu, Zhejiang, which was built in the fourth year of the Daguan Period of the Song Dynasty (1110), was struck by lightning, and the eaves on the southwest side of the fourth floor were knocked down by lightning. The Jiuzhou Pagoda in Yibin, which was built in the third year of the Daguan Period of the Northern Song Dynasty (1109 AD), had multiple cracks after being struck by lightning in 2013.

[0003] The building materials and structures of ancient pagodas are often significantly different from those of modern buildings, and their lightning protection facilities are relatively weak. Therefore, conducting lightning protection renovation and testing on ancient pagodas to improve their lightning protection capabilities is an important measure to ensure the safety of ancient pagodas and protect historical and cultural heritage. Installing lightning rods is an important part of the lightning protection renovation and testing project, which can significantly improve the lightning protection capabilities of ancient pagodas and reduce the threat of lightning to ancient pagodas.

[0004] Existing lightning protection measures applied to ancient pagodas mostly rely on physical structures, such as lightning rods, grounding devices, etc., which are semi-permanent and lack flexibility. At the same time, lightning rods usually need to be installed on the top of the building, which may damage the beauty of the building. Especially in some historical buildings such as ancient pagodas, lightning rods are usually difficult to install and are inconsistent with the architectural design.

[0005] Therefore, the present invention proposes a stretchable assembled steel structure for lightning protection of ancient towers to solve the above-mentioned problems. Summary of the invention

[0006] In view of the above-mentioned defects and problems, the present invention provides a flexible, beautiful, stable, easy-to-install and expandable prefabricated steel structure with good lightning protection effect, which can effectively solve the problems existing in the existing lightning protection measures for ancient towers and is suitable for lightning protection of various tall ancient towers.

[0007] The solution adopted by the present invention to solve its technical problems is: an extendable assembled steel structure for lightning protection of ancient towers, including a bottom box and a scissors frame, the scissors frame is eccentrically arranged on the bottom box, the scissors frame is extended and retracted in an arc-shaped structure, and a hydraulic cylinder for driving the scissors frame to extend and retract is arranged in the bottom box, the scissors frame is hinged by a plurality of X-shaped and symmetrically arranged scissors basic units, the two ends of each group of scissors basic units are hinged by end circular rods, and the center position is hinged by an intermediate circular rod, a top end of the scissors frame is installed with a push rod, one end of the push rod is hinged to the left side of the top end of the scissors frame, and the other end of the push rod is provided with a slide groove along the length direction of the rod body, and the right side of the top end of the scissors frame is slidably connected to the slide groove of the push rod through the end circular rod, and when the scissors frame is fully unfolded, the push rod is vertically arranged above the ancient building.

[0008] Furthermore, guide rail steps are symmetrically arranged on one side of the edge of the bottom box, and a height difference is formed on both sides of the bottom box due to the guide rail steps. A guide groove is opened in the guide rail step, and the right side of the bottom end of the scissors frame is slidably connected in the guide groove through an end circular rod, and the left side of the bottom end of the scissors frame is hingedly installed on the other side of the bottom box, and the installation heights on both sides of the lower end of the scissors frame have a height difference.

[0009] Furthermore, a flat hole slot is provided on the end circular rod of each scissor basic unit, and an elastic pulling belt is provided in the scissor frame. The elastic pulling belt is guided through the entire scissor frame through the flat hole slot. The top end of the elastic pulling belt is fixed to the topmost end circular rod, and the bottom end is fixed to the bottom box. A locking screw is threadedly installed in the flat hole slot, and the locking screw is used to lock the elastic pulling belt.

[0010] Furthermore, a hydraulic cylinder is arranged in the bottom box, and a driving rod of the hydraulic cylinder is connected to one side of the guide rail step of the bottom box through a circular rod at the end that is slidably sleeved in the guide groove, and the bottom end of the hydraulic cylinder is movably hinged to the other side of the bottom box.

[0011] Furthermore, a lightning rod is installed at the top of the scissors frame, and a wire through-hole is provided on the middle circular rod of each basic scissors unit. An electric wire is connected to the lightning rod. The electric wire is pulled through the entire scissors frame through the wire through-hole, and the lower end of the electric wire is grounded. A wire retracting mechanism for controlling the retraction and release of the electric wire is also provided in the bottom box.

[0012] Furthermore, the wire-taking mechanism includes a motor installed on the bottom box, the output end of the motor is fixedly connected to a rotating shaft, a wire roller is fixedly mounted on the rotating shaft, and the wire is wound around the wire roller.

[0013] Furthermore, the lightning rod is installed on the topmost end circular rod, and the lightning rod is located between the two top rods and arranged parallel to them.

[0014] Furthermore, the top rod is used as a lightning rod, and the bottom box, scissor frame and top rod are made of Q355 steel throughout, and the combination of the three has a lightning protection effect.

[0015] Beneficial effects of the present invention: The present invention sets an eccentric connection between the scissor frames, and under the action of the hydraulic cylinder, the scissor frames can be extended in a lateral curve. When the scissor frames are extended to the maximum extent, the top rod is in a vertical state, acting as a lightning rod to prevent the ancient tower from being struck by lightning, making up for the defect that the existing lightning protection measures need to be arranged on the basis of the tower body, especially for the ancient towers that are old and the tower body material performance has declined, which may damage the original structure and appearance of the ancient tower; the present invention is simple to operate, can be judged in real time according to the weather conditions, if there is thunderstorm weather, the structure is opened, otherwise the structure is folded, the flexibility is strong, and the defect that the existing lightning protection measures cannot be removed once arranged is made up; The present invention is mainly assembled from several groups of scissor frame units, which can be assembled into a structure of appropriate height according to the height of the ancient tower to be protected by lightning protection. It has the advantage of high adaptability, and the modular design of the bottom box and the scissor frame has the advantages of simple production, convenient transportation, quick installation, etc., so that the whole structure is easy to install and maintain, and is suitable for various complex sites. The overall design of the present invention is simple and easy to operate. Compared with the existing lightning protection measures, it does not need to consider the various factors of the ancient tower itself, which makes up for the defect of high design complexity of the existing lightning protection measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention in a fully folded state; Figure 2 It is a schematic diagram of the structure of the present invention in an incompletely extended state; Figure 3 It is a schematic diagram of the structure of the present invention in a fully extended state; Figure 4 It is a schematic diagram of the structure of the bottom box and the scissor frame of the present invention; Figure 5 It is a schematic diagram of the top rod structure of the present invention; Figure 6 It is a schematic diagram of the second embodiment of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at A in the middle; Figure 8 for Figure 6 Schematic diagram of the enlarged structure at point B.

[0017] In the figure: 1. bottom box; 11. guide rail step; 12. guide groove; 2. hydraulic cylinder; 3. scissors frame; 31. scissors basic unit; 32. end round rod; 33. middle round rod; 321. flat hole through groove; 322. set screw; 331. wire through hole; 4. top rod; 41. slide groove; 5. lightning rod; 6. electric wire; 7. elastic pulling belt; 8. wire take-up mechanism; 81. motor; 82. rotating shaft; 83. wire roller. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] See also Figure 1-8 The present invention provides a technical solution of a stretchable assembled steel structure for lightning protection of ancient towers, which is mainly used in the field of lightning protection of ancient towers, especially in tall ancient towers that are very old, have degraded material properties, have complex surrounding meteorological conditions, are located in open areas and lack lightning protection systems. Example

[0020] according to Figure 1 , Figure 2 and Figure 3 As shown, an extendable assembled steel structure for lightning protection of ancient towers comprises a bottom box 1, on which a scissor frame 3 is installed, the scissor frame 3 is eccentrically arranged on the bottom box 1, the scissor frame 3 extends and retracts in an arc-shaped structure when extending and retracting, and a hydraulic cylinder 2 for driving the scissor frame 3 to extend and retract is arranged in the bottom box 1, and a top rod 4 that can be used as a lightning rod is installed at the top of the scissor frame 3; in actual use, the bottom box 1 is fixed on the ground near the ancient tower or on a platform close to the top of the ancient building according to the height of the ancient building, the hydraulic cylinder 2 is extended and driven by the scissor frame 3 to extend and gradually tilt and unfold toward the top of the ancient building, when the scissor frame 3 is fully extended, an arc-shaped support frame is formed, and the top rod 4 is moved to the top of the ancient building and arranged vertically, so that lightning protection measures are provided for the ancient building through the top rod 4 acting as a lightning rod and the overall steel structure.

[0021] like Figure 4As shown, two upwardly protruding guide rail steps 11 are symmetrically arranged on one side of the edge of the bottom box 1, so that two areas with a height difference are formed on both sides of the bottom box 1, and a guide groove 12 is opened in the guide rail step 11. The left side of the bottom end of the scissors frame 3 is hingedly installed in the low-position area of ​​the bottom box 1, and the right side of the bottom end of the scissors frame 3 is slidably connected in the guide groove 12 of the guide rail step 11 through the end circular rod 32, that is, the right side of the bottom end of the scissors frame 3 is hingedly installed in the high-position area of ​​the bottom box 1, so that the installation heights of the two sides of the lower end of the scissors frame 3 have a height difference. This arrangement allows the scissors frame 3 to be eccentrically tilted and installed on the bottom box 1, so that the scissors frame 3 can be unfolded by an arc movement, and in order to improve the stability of the scissors frame 3, the scissors frame 3 is arranged into two groups, and the two groups of scissors frames 3 are symmetrically installed on the bottom box 1 in the same way, and the two groups of scissors frames 3 are connected by a circular rod. A hydraulic cylinder 2 is arranged in the bottom box 1, and the bottom end of the hydraulic cylinder 2 is movably hinged in the low-position area of ​​the bottom box 1. The driving rod of the hydraulic cylinder 2 is connected to one side of the scissor frame 3 located in the high-position area. The extension or folding of the scissor frame 3 can be controlled by the extension and retraction of the hydraulic cylinder 2.

[0022] like Figure 5 As shown, a top rod 4 is movably hinged at the top of the scissors frame 3, one end of the top rod 4 is hinged to the left side of the top of the scissors frame 3, and the other end of the top rod 4 is provided with a slide groove 41 along the length direction of the rod body. The right side of the top of the scissors frame 3 is slidably connected to the slide groove 41 of the top rod 4 through the end circular rod 32. When the scissors frame 3 is fully unfolded, the top rod 4 is vertically arranged above the ancient building.

[0023] The overall structure of the present invention is made of Q355 steel throughout. The scissors frame 3 is formed by hingedly connecting a plurality of X-shaped scissors basic units 31. The hinged positions at both ends of each scissors basic unit 31 are hinged by end circular rods 32, and the center hinged position is hinged by an intermediate circular rod 33. By arranging circular rods at each hinged position of the scissors frame 3, the strength of the overall structure can be effectively improved, and the width of the scissors basic unit decreases with the height of the scissors frame, so that the structure can be smoothly assembled into a whole, and the sizes of the bottom box 1, the scissors frame 3 and the top rod 4 can be flexibly adjusted and assembled according to the height of the ancient building on site.

[0024] Here, the lightning protection of a 56-meter-high thousand-year-old tower is taken as an example: the expandable assembled steel structure of the present invention is constructed, the bottom box 1 is a rectangular frame with a length of 13m, a height of 1.5m, a thickness of 0.3m, and a wall thickness of 8mm; the top rod 4 is 12m long, 0.3m high, 0.15m thick, and 6mm thick; the scissor frame 3 has a total of 12 basic units, and every 4 scissor basic units 31 from bottom to top are a group, wherein the first group of scissor frames has a length of 12m, a height of 0.5m, a thickness of 0.25m, and a wall thickness of 10mm, and the top rod 4 is 12m long, 0.3m high, 0.15m thick, and a wall thickness of 6mm. The second set of scissor frames has a rod length of 12m, a height of 0.4m, a thickness of 0.2m and a wall thickness of 8mm. The third set of scissor frames has a rod length of 12m, a height of 0.3m, a thickness of 0.15m and a wall thickness of 6mm. All scissor frames are eccentrically connected, and the scissor frames are movably connected by circular rods with a radius of 0.1m and a wall thickness of 8mm. The expandable prefabricated steel structure used for lightning protection of the ancient tower is 13m long, 13m wide and approximately 5.8m high in the closed state; it is approximately 68.5m long, 13m wide and 82.7m high in the fully open state.

[0025] In specific use, the present invention is a stretchable assembled steel structure for lightning protection of ancient towers. First, the stretchable assembled steel structure is assembled and installed to a suitable position away from the ancient tower. At this time, the stretchable assembled steel structure is not stretched and is in a folded and closed state. Figure 1 As shown, when not in use, the structure can be folded into a compact state, which will not affect the appearance of the ancient tower, and solves the problem that the traditional lightning rod installed on the top of the ancient tower may damage the beauty of the building; in case of thunderstorms, the hydraulic cylinder 2 is controlled by the controller to operate, and the hydraulic cylinder 2 pushes the scissor frame 3 to tilt and extend. The scissor frame 3 pushes the top rod 4 to extend during the arc extension process. When the hydraulic cylinder 2 pushes the scissor frame 3 to extend to the fully extended state, Figure 3 As shown, the staff controls the hydraulic cylinder 2 to stop running. At this time, the structure is in a fully open state. At the same time, the top rod 4 is in a vertical upward state and is located directly above the ancient tower. The top rod 4 acts as a lightning rod to protect against lightning. The top of the top rod 4 can enhance the strength of the local electric field and form a local high electric field area. Since the electric field strength at the top of the top rod 4 is high, electric shock and discharge are more likely to occur. When the potential difference of the lightning cloud is large, the insulation of the air is broken down, and lightning discharge begins to occur. The lightning current is guided by the top rod 4 and conducted to the ground along the scissors frame 3 and the bottom box 1. Since the present invention is a steel structure as a whole with good conductivity, the lightning current can flow quickly and safely into the ground through the present invention without causing damage to the building and the surrounding environment. Example

[0026] On the basis of the first embodiment, in order to further improve the lightning protection effect of the stretchable assembled steel structure, a lightning rod 5 may be additionally installed at the top of the structure.

[0027] like Figure 6 and Figure 7 As shown, a lightning rod 5 is installed at the top of the scissor frame 3. The lightning rod 5 is installed on the end circular rod 32 which is slidably connected to the slide groove 41 of the top rod 4, so that the lightning rod 5 is between the two top rods 4 and arranged parallel to them. A wire through-hole 331 is penetrated on the middle circular rod 33 of each scissor basic unit 31 of the scissor frame 3. The wire 6 required by the lightning rod 5 passes through the wire through-hole 331 in turn and is pulled upward and finally connected to the lightning rod 5 at the top. The lower end of the wire 6 is grounded and is taken up or released through the take-up mechanism 8.

[0028] The wire-taking mechanism 8 includes a motor 81 installed on the bottom box 1, a rotating shaft 82 is fixedly connected to the output end of the motor 81, the front end of the rotating shaft 82 is fixed by an axle seat, a wire roller 83 is fixedly mounted on the rotating shaft 82, the wire 6 is wound around the wire roller 83, and the wire 6 is taken up and released through the wire roller 83.

[0029] In specific use, the present invention is an extendable assembled steel structure for lightning protection of ancient pagodas. When the hydraulic cylinder 2 pushes the scissors frame 3 to extend or retract, the motor 81 synchronously drives the wire roller 83 to rotate forward to pay out the wire or reverse to reel in the wire. Through the cooperation of the wire perforations 331 on the scissors frame 3, the wire 6 is guided to be retracted and released, so that the length of the wire 6 can be adaptively adjusted according to the position of the lightning rod 5, ensuring that the lightning rod 5 can be smoothly connected to the wire 6 to achieve a lightning protection effect. Example

[0030] Based on the first embodiment, the same points as the first embodiment will not be described again, and the differences are as follows: In order to further improve the stability of the scissor frame, a plurality of elastic pulling belts 7 are arranged in the scissor frame 3, such as Figure 6 and Figure 8 As shown, two flat hole slots 321 are symmetrically provided on the end circular rod 32 of each scissor basic unit 31, and an elastic pulling belt 7 is arranged in the scissor frame 3 through the flat hole slot 321. The elastic pulling belt 7 is guided through the flat hole slot 321 and passes through the entire scissor frame 3, and the top end of the elastic pulling belt 7 is fixed on the top end circular rod 32, and the bottom end is fixed on the bottom box 1, and a locking screw 322 is threadedly installed in the flat hole slot 321 of each end circular rod 32, and the position of the elastic pulling belt 7 can be locked by the locking screw 322.

[0031] When used specifically, the present invention is a stretchable assembled steel structure for lightning protection of ancient pagodas. First, the elastic pull belt 7 is equidistantly fixed on each scissor frame 3 by means of a set screw 322, so that the elastic pull belt 7 is in a relaxed state and passes through the entire scissor frame 3. When the scissor frame 3 is stretched until it is fully unfolded, the elastic pull belt 7 becomes taut, and two adjacent scissor frame 3 basic units can borrow force from each other through the elastic pull belt 7, thereby further improving the overall stability of the scissor frame 3. The design of the scissor frame structure and the elastic pull belt allows the entire structure to remain stable during the stretching and folding process, avoiding safety hazards caused by structural instability.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stretchable assembled steel structure for lightning protection of an ancient tower, comprising a bottom box (1), characterized in that: The invention also comprises a scissor frame (3), wherein the scissor frame (3) is eccentrically arranged on the bottom box (1), and the scissor frame (3) is extended and retracted in an arc-shaped structure when being extended and retracted, and a hydraulic cylinder (2) for driving the scissor frame (3) to be extended and retracted is arranged in the bottom box (1), and the scissor frame (3) is formed by hingedly connecting a plurality of X-shaped and symmetrically arranged scissor basic units (31), and the two ends of each group of scissor basic units (31) are hingedly connected by end circular rods (32), and the center position is hingedly connected by an intermediate circular rod (33), and a top rod (4) is installed at the top end of the scissor frame (3), and one end of the top rod (4) is hingedly connected to the left side of the top end of the scissor frame (3), and the other end of the top rod (4) is provided with a slide groove (41) along the length direction of the rod body, and the right side of the top end of the scissor frame (3) is slidably connected to the slide groove (41) of the top rod (4) through the end circular rod (32), and when the scissor frame (3) is fully unfolded, the top rod (4) is arranged in a vertical state above the ancient building.

2. The extendable assembled steel structure for lightning protection of ancient towers according to claim 1 is characterized in that: A guide rail step (11) is symmetrically arranged on one side of the edge of the bottom box (1), and a height difference is formed between the two sides of the bottom box (1) due to the guide rail step (11). A guide groove (12) is opened in the guide rail step (11), and the right side of the bottom end of the scissor frame (3) is slidably connected in the guide groove (12) through an end circular rod (32), and the left side of the bottom end of the scissor frame (3) is hingedly installed on the other side of the bottom box (1), and the installation heights of the two sides of the lower end of the scissor frame (3) have a height difference.

3. The extendable assembled steel structure for lightning protection of ancient towers according to claim 1 is characterized in that: A flat hole slot (321) is provided on the end circular rod (32) of each scissor-type basic unit (31); an elastic pulling belt (7) is provided in the scissor-type frame (3); the elastic pulling belt (7) is guided through the flat hole slot (321) and passes through the entire scissor-type frame (3); the top end of the elastic pulling belt (7) is fixed to the topmost end circular rod (32); the bottom end is fixed to the bottom box (1); a set screw (322) is threadedly installed in the flat hole slot (321); the set screw (322) is used to lock the elastic pulling belt (7).

4. The extendable assembled steel structure for lightning protection of ancient towers according to claim 2 is characterized in that: A hydraulic cylinder (2) is arranged in the bottom box (1); a driving rod of the hydraulic cylinder (2) is connected to one side of the guide rail step (11) of the bottom box (1) through an end circular rod (32) slidably sleeved in the guide groove (12); and the bottom end of the hydraulic cylinder (2) is movably hinged to the other side of the bottom box (1).

5. The extendable assembled steel structure for lightning protection of ancient towers according to claim 1 is characterized in that: A lightning rod (5) is installed at the top of the scissor frame (3), and a wire through hole (331) is provided through the middle circular rod (33) of each scissor basic unit (31). An electric wire (6) is connected to the lightning rod (5), and the electric wire (6) is pulled through the entire scissor frame (3) through the wire through hole (331), and the bottom end of the electric wire (6) is grounded. A wire retracting mechanism (8) for controlling the retracting and releasing of the electric wire is also provided on the bottom box (1).

6. The extendable assembled steel structure for lightning protection of ancient towers according to claim 5 is characterized in that: The wire take-up mechanism (8) comprises a motor (81) mounted on the bottom box (1); the output end of the motor (81) is fixedly connected to a rotating shaft (82); a wire roller (83) is fixedly mounted on the rotating shaft (82); and the wire (6) is wound around the wire roller (83).

7. The extendable assembled steel structure for lightning protection of ancient towers according to claim 5 is characterized in that: The lightning rod (5) is mounted on the topmost end circular rod (32), and the lightning rod (5) is located between the two top rods (4) and is arranged parallel to the two top rods (4).

8. The extendable assembled steel structure for lightning protection of ancient towers according to claim 1 is characterized in that: The top rod (4) is used as a lightning rod. The bottom box (1), the scissor frame (3) and the top rod (4) are all made of Q355 steel, and the three cooperate to have a lightning protection effect.

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