Automatic lifting equipment for anti-throwing nets during bridge pier construction

Abstract

The present invention discloses an automatic lifting device for anti-throwing nets in bridge pier construction, which includes a plurality of lifting devices, a hoop mechanism and an anti-throwing net fixing device. The plurality of lifting devices are installed on the opposite sides of the pier, and the lifting devices on the same side of the pier are connected by an installation frame. The hoop mechanism is wrapped around the outer surface of the pier, and the lifting device is used to drive the hoop mechanism to move on the pier. An anti-throwing net fixing device is installed on the hoop mechanism, and the lifting device is electrically connected to the PLC controller. The beneficial effect of the present invention is that the PLC controller controls the lifting device to drive the hoop mechanism to move up and down, and then drives the anti-throwing net installed on the hoop mechanism to move up and down, so as to realize the climbing and descending of the anti-throwing net, so that multiple anti-throwing nets do not need to be matched for the same pier, thereby reducing the construction cost.

Description

Technical Field

[0001] The present invention relates to the field of construction safety protection equipment, in particular to an automatic lifting device for anti-throwing nets in bridge pier construction. Background Art

[0002] With the country's emphasis on construction safety and the increasing improvement of relevant policies and technical specifications, during the construction of bridge piers, the height of the piers can sometimes reach more than 100 meters, and there are great safety hazards of falling objects or accidental falls. Anti-throwing nets have become essential safety equipment. However, the installation of traditional anti-throwing nets during construction is complex, time-consuming and laborious. Multiple sets of anti-throwing nets need to be equipped for the same pier, greatly increasing the cost of temporary measures and resulting in an increase in construction costs. Moreover, the traditional anti-throwing nets have a single function and cannot move automatically, and the fixing method requires reserved holes or embedded parts in the pier. Therefore, through long-term research by the inventor, an automatic lifting device for anti-throwing nets in bridge pier construction has been invented. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an automatic lifting device for anti-throwing nets in bridge pier construction.

[0004] The purpose of the present invention is achieved through the following technical solutions: An automatic lifting device for anti-throwing nets in bridge pier construction includes a plurality of lifting devices, a hoop mechanism and an anti-throwing net fixing device. The plurality of lifting devices are installed on the opposite sides of the pier, and the lifting devices on the same side of the pier are connected by an installation frame. The hoop mechanism is wrapped around the outer surface of the pier, and the lifting device is used to drive the hoop mechanism to move on the pier. An anti-throwing net fixing device is installed on the hoop mechanism, and the lifting device is electrically connected to a PLC controller.

[0005] Preferably, the lifting device includes an upper clamping mechanism, a lower clamping mechanism and a worm lifting mechanism. The lower clamping mechanisms on the same side of the pier are connected by an installation frame. A worm lifting mechanism is installed above the installation frame, and an upper clamping mechanism is arranged outside the worm lifting mechanism. The upper clamping mechanism clamps the pier through motor a, and the lower clamping mechanism clamps the pier through motor b. Motor a, motor b and the worm lifting mechanism are all electrically connected to the PLC controller.

[0006] Preferably, the structures of the upper clamping mechanism and the lower clamping mechanism are the same.

[0007] Preferably, the lower clamping mechanism includes a bracket and a worm and worm gear telescopic mechanism. The bracket is in an "L" shape and is installed on the worm lifting mechanism. A mounting seat is installed on the upper surface of the bracket. One end of the worm and worm gear telescopic mechanism is installed in the mounting seat and fixed by pin b. A groove is provided on the short board of the bracket, and a pressing boot is installed in the groove. The upper end of the pressing boot is hinged to the other end of the worm and worm gear telescopic mechanism. Motor b is used to drive the worm and worm gear telescopic mechanism to expand and contract. A rubber pressing plate is installed at the lower end of the pressing boot, and the rubber pressing plate is used to clamp and release the pier column.

[0008] Preferably, the worm lifting mechanism includes a pressing mounting frame, a lifting bracket, a lifting device, and a lifting support. The pressing mounting frame is installed on the mounting frame. Two lifting brackets are installed on the upper surface of the pressing mounting frame. The bottom ends of the lifting brackets are fixed by screws, and the two lifting brackets are connected by a reinforcing plate. The upper end of the lifting bracket is installed with an upper clamping mechanism. The upper surface of the pressing mounting frame is also installed with a lifting support and the bracket inside the lower clamping mechanism. Both the lifting support and the bracket are fixed by bolts. The lifting support is located inside the lifting bracket, and the bracket is located outside the lifting bracket. The bottom end of the lifting device is installed in the lifting support by a pin, and the lifting device is electrically connected to the PLC controller.

[0009] Preferably, the lifting device includes a lifting motor and a worm. A connecting portion is provided at the bottom of the worm, and the connecting portion is installed in the lifting support by a pin. A protective sleeve is sleeved outside the worm. The lifting motor is installed outside the reinforcing plate, and the power output end of the lifting motor is connected to a rotating shaft. A number of driving wheels are sleeved on the rotating shaft, and the driving wheels are meshed and connected to the worm. The lifting motor is electrically connected to the PLC controller.

[0010] Preferably, the lifting bracket includes a lifting bracket body. The bottom of the lifting bracket body is fixed on the pressing mounting frame by screws. A linear guide rail is installed at the lower part of the lifting bracket body by an internal hexagonal screw. A slider is provided on the linear guide rail, and the slider is connected to the side surface of the mounting frame.

[0011] Preferably, the hoop mechanism includes a long rod, a short rod, and a connecting rod. The short rod and the long rod are sequentially connected to form a rectangular frame, and a number of rectangular frames are distributed vertically. The rectangular frames are connected by connecting rods. The long rod and the short rod are connected by a bracket.

[0012] Preferably, a number of casters are installed inside the short rod, and the casters move on the surface of the pier column.

[0013] Preferably, the anti-throwing net fixing device includes an upper pipe network, a lower pipe network, a number of support frames, and auxiliary support frames. One end of the support frame is installed on the upper rectangular frame, and a lower pipe network is installed at the upper end of the support frame. The other end of the support frame is installed with an upper pipe network. The upper pipe network is located outside the lower pipe network. One end of the auxiliary support frame is installed on the lower rectangular frame, and the other end of the auxiliary support frame is installed on the lower surface of the support frame.

[0014] The present invention has the following advantages: The present invention controls the lifting device through a PLC controller to drive the hoop mechanism to move up and down, and then drives the anti-throwing net installed on the hoop mechanism to move up and down, so as to realize the climbing and descending of the anti-throwing net, enabling the same pier not to be equipped with multiple anti-throwing nets, thereby reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the lifting equipment;

[0016] Figure 2 is a schematic structural diagram of the lifting device;

[0017] Figure 3 is a schematic structural diagram of the lower clamping mechanism;

[0018] Figure 4 is a schematic structural diagram of the lower clamping mechanism from another perspective;

[0019] Figure 5 is a schematic structural diagram of the worm lifting mechanism;

[0020] Figure 6 is a schematic structural diagram of the lifting bracket;

[0021] Figure 7 is a schematic structural diagram of the hoop mechanism;

[0022] Figure 8 is a schematic structural diagram of the positional relationship between the lifting device and the hoop mechanism;

[0023] Figure 9 is a schematic structural diagram of the anti-throwing net fixing device;

[0024] In the figure, 1 - lower clamping mechanism, 2 - anti-throwing net fixing device, 3 - upper clamping mechanism, 4 - hoop mechanism, 5 - worm lifting mechanism, 6 - mounting frame, 7 - motor a, 8 - motor b, 9 - lifting motor, 11 - worm, 12 - reinforcement plate, 14 - bolt, 15 - pin shaft, 16 - lifting support, 17 - lifting device, 18 - lifting bracket, 19 - pressing mounting frame, 21 - lifting device, 101 - pin shaft b, 102 - worm and gear telescopic mechanism, 103 - pressing shoe, 104 - bracket, 105 - rubber pressing plate, 201 - main body of the lifting bracket, 202 - linear guide rail, 203 - slider, 204 - socket head cap screw, 205 - short rod, 206 - bracket, 207 - long rod, 208 - connecting rod, 209 - caster, 210 - support frame, 211 - lower pipe network, 212 - upper pipe network, 213 - auxiliary support frame. DETAILED DESCRIPTION OF THE INVENTION

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0027] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[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 the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In this embodiment, as Figure 1As shown in the figure, the anti-throwing net automatic lifting device in bridge pier construction includes several lifting devices 21, a hoop mechanism 4, and an anti-throwing net fixing device 2. The several lifting devices 21 are installed on the opposite sides of the pier column. That is to say, the lifting devices 21 clamp the pier column, and the lifting devices 21 are symmetrically installed on the opposite sides of the pier column. And the lifting devices 21 on the same side of the pier column are connected by an installation frame 6. The hoop mechanism 4 is wrapped around the outer surface of the pier column, and the lifting devices 21 are used to drive the hoop mechanism 4 to move on the pier column. The anti-throwing net fixing device 2 is installed on the hoop mechanism 4, and the lifting devices 21 are electrically connected to the PLC controller. By controlling the lifting devices 21 through the PLC controller to drive the hoop mechanism 4 to move up and down, and then drive the anti-throwing net installed on the hoop mechanism 4 to move up and down, so as to realize the climbing and descending of the anti-throwing net, so that the same pier column does not need to be equipped with multiple anti-throwing nets, thereby reducing the construction cost.

[0032] Further, as Figure 2 shown, the lifting device 21 includes an upper clamping mechanism 3, a lower clamping mechanism 1, and a worm lifting mechanism 5. The lower clamping mechanisms 1 on the same side of the pier column are connected by an installation frame 6. A worm lifting mechanism 5 is installed above the installation frame 6. An upper clamping mechanism 3 is arranged outside the worm lifting mechanism 5. The upper clamping mechanism 3 clamps the pier column through a motor a7, and the lower clamping mechanism 1 clamps the pier column through a motor b8. The motor a7, the motor b8, and the worm lifting mechanism 5 are all electrically connected to the PLC controller. Among them, the structures of the upper clamping mechanism 3 and the lower clamping mechanism 1 are the same. Still further, as Figure 3 and Figure 4As shown in the figure, the lower clamping mechanism 1 includes a bracket 104 and a worm and worm gear telescopic mechanism 102. The bracket 104 is in an "L" shape and is installed on the worm lifting mechanism 5. An installation seat is installed on the upper surface of the bracket 104. One end of the worm and worm gear telescopic mechanism 102 is installed in the installation seat and fixed by a pin b101. A groove is provided on the short board of the bracket 104, and a pressing shoe 103 is installed in the groove. The upper end of the pressing shoe 103 is hinged to the other end of the worm and worm gear telescopic mechanism 102. The motor b8 is used to drive the worm and worm gear telescopic mechanism 102 to expand and contract. A rubber pressing plate 105 is installed at the lower end of the pressing shoe 103, and the rubber pressing plate 105 is used to clamp and release the pier column. Specifically, the clamping mentioned in this embodiment refers to the operations of clamping and releasing the pier column. When the rubber pressing plate 105 on the lower clamping mechanism 1 needs to clamp the pier column, the staff uses the PLC controller to make the motor b8 control the worm and worm gear telescopic mechanism 102 to shorten. Since the upper end of the pressing shoe 103 is hinged to the other end of the worm and worm gear telescopic mechanism 102, the lower end of the pressing shoe 103 will move synchronously. Furthermore, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move inward, so as to tightly press on the surface of the pier column. When the rubber pressing plate 105 on the lower clamping mechanism 1 needs to release the pier column, the staff uses the PLC controller to make the motor b8 control the worm and worm gear telescopic mechanism 102 to extend. Since the upper end of the pressing shoe 103 is hinged to the other end of the worm and worm gear telescopic mechanism 102, the lower end of the pressing shoe 103 will move synchronously. Furthermore, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move outward, so as to remove the pressing force of the rubber pressing plate 105. The clamping and releasing operation processes of the upper pressing mechanism 3 are the same as those of the lower pressing mechanism 1, and will not be elaborated here. The rubber pressing plate 105 can increase the friction force with the pier column.

[0033] In this embodiment, as Figure 5As shown, the worm lifting mechanism 5 includes a pressing mounting frame 19, a lifting bracket 18, a lifting device 17 and a lifting support 16. The pressing mounting frame 19 is mounted on the mounting frame 6. Two lifting brackets 18 are mounted on the upper surface of the pressing mounting frame 19. The bottom ends of the lifting brackets 18 are fixed by screws, and the two lifting brackets 18 are connected by a reinforcing plate 12. An upper clamping mechanism 3 is mounted at the upper ends of the lifting brackets 18. A lifting support 16 and a bracket 104 inside the lower clamping mechanism 1 are also mounted on the upper surface of the pressing mounting frame 19. Both the lifting support 16 and the bracket 104 are fixed by bolts 14. The lifting support 16 is located inside the lifting brackets 18, and the bracket 104 is located outside the lifting brackets 18. The bottom end of the lifting device 17 is mounted in the lifting support 16 through a pin shaft 15. The lifting device 17 is electrically connected to the PLC controller. Further, the lifting device 17 includes a lifting motor 9 and a worm 11. A connecting portion is provided at the bottom of the worm 11. The connecting portion is mounted in the lifting support 16 through a pin shaft 15. A protective sleeve is sleeved outside the worm 11. The lifting motor 9 is mounted outside the reinforcing plate 12, and the power output end of the lifting motor 9 is connected to a rotating shaft. A plurality of driving wheels are sleeved on the rotating shaft. The driving wheels are meshed and connected with the worm 11. The lifting motor 9 is electrically connected to the PLC controller. Still further, as Figure 6As shown, the lifting bracket 18 includes a lifting bracket body 201. The bottom of the lifting bracket body 201 is fixed to the pressing mounting bracket 19 by screws. A linear guide rail 202 is installed at the lower part of the lifting bracket body 201 by an internal hexagonal screw 204. A slider 203 is arranged on the linear guide rail 202, and the slider 203 is connected to the side surface of the mounting bracket 6. The main function of the linear guide rail 202 is to perform limit. Specifically, when climbing is required, at this time, the worm 11 is located in the protective sleeve and is at the minimum stroke. First, the staff makes the motor b8 control the shortening of the worm and gear telescopic mechanism 102 through the PLC controller. Since the upper end of the pressing shoe 103 is hinged to the other end of the worm and gear telescopic mechanism 102, the lower end of the pressing shoe 103 will move synchronously. Further, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move inward, thus tightly pressing on the surface of the pier column. Then the staff makes the motor a7 control the elongation of the worm and gear telescopic mechanism 102 (here it is the upper clamping mechanism 3) through the PLC controller. Since the upper end of the pressing shoe 103 is hinged to the other end of the worm and gear telescopic mechanism 102, the lower end of the pressing shoe 103 will move synchronously. Further, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move outward, thus removing the pressing force of the rubber pressing plate 105 and not being stressed. Immediately afterwards, the staff controls the PLC controller to start the lifting motors 9 on the opposite side of the pier column at the same time to ensure synchronization. The lifting motors 9 drive the rotating shaft to rotate, and then the driving wheel on the rotating shaft drives the worm 11 to rotate. At this time, the slider 203 moves downward relative to the linear guide rail 202, so that the upper clamping mechanism 3 starts to rise. At this time, the worm 11 extends out of the protective sleeve. After the rising is completed, the staff controls the PLC controller to make the motor a7 control the shortening of the worm and gear telescopic mechanism 102 (here it is the upper clamping mechanism 3). Since the upper end of the pressing shoe 103 is hinged to the other end of the worm and gear telescopic mechanism 102, the lower end of the pressing shoe 103 will move synchronously. Further, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move inward, thus tightly pressing on the surface of the pier column. At this time, the worm and gear telescopic mechanism 102 of the lower clamping mechanism 1 elongates, and further, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move outward, thus removing the pressing force of the rubber pressing plate 105 and not being stressed. Next, control the lifting motor 9 to start again. At this time, the slider 203 moves upward on the linear guide rail 202. Since the slider 203 is connected to the mounting bracket 6, the lower clamping mechanism 1 is driven to rise, so that the worm 11 returns to the protective sleeve again and is at the minimum stroke. Finally, control the shortening of the worm and gear telescopic mechanism 102 of the lower clamping mechanism 1. Further, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move inward, thus tightly pressing on the surface of the pier column; the worm and gear telescopic mechanism 102 of the upper clamping mechanism 3 elongates, and further, the rubber pressing plate 105 at the lower end of the pressing shoe 103 will move outward, thus tightly pressing on the surface of the pier column and thus removing the pressing force of the rubber pressing plate 105 and not being stressed. Thus, an ascending process is completed. The descending process is opposite to the ascending process and will not be elaborated here.In this embodiment, the lifting speed can be actually adjusted by controlling the output power of the motor.

[0034] In this embodiment, as Figure 7 and Figure 8 shown, the hoop mechanism 4 includes a long rod 207, a short rod 205, and a connecting rod 208. The short rod 205 and the long rod 207 are sequentially connected to form a rectangular frame, and several rectangular frames are distributed vertically. The rectangular frames are connected by connecting rods. The long rod 207 and the short rod 205 are connected by a bracket 206. Further, several casters 209 are installed on the inner side of the short rod 205, and the casters 209 move on the surface of the pier. Specifically, the rectangular frame is installed on the surface of the pier. There are two rectangular frames. The main function of the casters 209 is to facilitate the movement of the hoop mechanism on the surface of the pier.

[0035] Further, as Figure 9 shown, the anti-throwing net fixing device 2 includes an upper pipe network 212, a lower pipe network 211, several support frames 210, and an auxiliary support frame 213. One end of the support frame 210 is installed on the upper rectangular frame, and the lower pipe network 211 is installed at the upper end of the support frame 210. The other end of the support frame 210 is installed with the upper pipe network 212. The upper pipe network 212 is located outside the lower pipe network 211. One end of the auxiliary support frame 213 is installed on the lower rectangular frame, and the other end of the auxiliary support frame 213 is installed on the lower surface of the support frame 210. Specifically, the support frame 210 is in the shape of a right triangle, and a reinforcing rod b is also installed between the two right-angled sides, so that the reinforcing rod b and the two right-angled sides together form a right triangle, thereby ensuring the installation strength of the upper pipe network 212. An inclined rod is also provided on the upper surface of the support frame 210, and the lower pipe network 211 is installed at the top of the inclined rod. That is to say, a right triangle is formed by the inclined rod, the surface of the pier, and one right-angled side of the support frame 210, thereby ensuring the installation strength of the lower pipe network 211. In this embodiment, the lower pipe network 211 is located on the surface of the pier.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic lifting device for anti-throwing nets during bridge pier construction, characterized in that: It includes a number of lifting devices (21), a hoop mechanism (4) and an anti-throwing net fixing device (2). A number of the lifting devices (21) are installed on the opposite sides of the pier column, and the lifting devices (21) on the same side of the pier column are connected by an installation frame (6). The hoop mechanism (4) is wrapped around the outer surface of the pier column, and the lifting device (21) is used to drive the hoop mechanism (4) to move on the pier column. The anti-throwing net fixing device (2) is installed on the hoop mechanism (4), and the lifting device (21) is electrically connected to the PLC controller; The lifting device (21) includes an upper clamping mechanism (3), a lower clamping mechanism (1) and a worm lifting mechanism (5). The lower clamping mechanism (1) clamps the pier column through a motor b (8). The lower clamping mechanism (1) includes a bracket (104) and a worm and gear telescopic mechanism (102). The bracket (104) is in an "L" shape. The bracket (104) is installed on the worm lifting mechanism (5). A mounting seat is installed on the upper surface of the bracket (104). One end of the worm and gear telescopic mechanism (102) is installed in the mounting seat and fixed by a pin b (101). A groove is formed on the short board of the bracket (104), and a pressing shoe (103) is installed in the groove. The upper end of the pressing shoe (103) is hinged to the other end of the worm and gear telescopic mechanism (102). The motor b (8) is used to drive the worm and gear telescopic mechanism (102) to expand and contract. A rubber pressing plate (105) is installed at the lower end of the pressing shoe (103), and the rubber pressing plate (105) is used to clamp and loosen the pier column; The hoop mechanism (4) includes a long rod (207) and a short rod (205). The short rod (205) and the long rod (207) are sequentially connected to form a rectangular frame, and a number of the rectangular frames are distributed up and down. The anti-throwing net fixing device (2) includes an upper pipe network (212), a lower pipe network (211) and a number of support frames (210). One end of the support frame (210) is installed on the upper rectangular frame, and the lower pipe network (211) is installed at the upper end of the support frame (210). The other end of the support frame (210) is installed with the upper pipe network (212). The upper pipe network (212) is located outside the lower pipe network (211). The support frame (210) is in a right triangle, and a reinforcing rod b is also installed between the two right sides, so that the reinforcing rod b and the two right sides together form a right triangle.

2. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 1, characterized in that: The lower clamping mechanisms (1) on the same side of the pier column are connected by the installation frame (6). The worm lifting mechanism (5) is installed above the installation frame (6). The upper clamping mechanism (3) is arranged outside the worm lifting mechanism (5). The upper clamping mechanism (3) clamps the pier column through a motor a (7). The motor a (7), the motor b (8) and the worm lifting mechanism (5) are all electrically connected to the PLC controller.

3. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 2, characterized in that: The structures of the upper clamping mechanism (3) and the lower clamping mechanism (1) are the same.

4. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 3, characterized in that: The worm lifting mechanism (5) includes a pressing mounting frame (19), a lifting bracket (18), a lifting device (17) and a lifting support (16). The pressing mounting frame (19) is mounted on the mounting frame (6). Two lifting brackets (18) are mounted on the upper surface of the pressing mounting frame (19). The bottom ends of the lifting brackets (18) are fixed by screws, and the two lifting brackets (18) are connected by a reinforcing plate (12). The upper clamping mechanism (3) is mounted at the upper ends of the lifting brackets (18). The lifting support (16) and the bracket (104) inside the lower clamping mechanism (1) are also mounted on the upper surface of the pressing mounting frame (19). The lifting support (16) and the bracket (104) are both fixed by bolts (14). The lifting support (16) is located inside the lifting brackets (18), and the bracket (104) is located outside the lifting brackets (18). The bottom end of the lifting device (17) is mounted in the lifting support (16) through a pin shaft (15), and the lifting device (17) is electrically connected to the PLC controller.

5. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 4, characterized in that: The lifting device (17) includes a lifting motor (9) and a worm (11). A connecting portion is provided at the bottom of the worm (11), and the connecting portion is mounted in the lifting support (16) through a pin shaft (15). A protective sleeve is sleeved outside the worm (11). The lifting motor (9) is mounted outside the reinforcing plate (12), and the power output end of the lifting motor (9) is connected to a rotating shaft. A plurality of driving wheels are sleeved on the rotating shaft, and the driving wheels are meshed and connected with the worm (11). The lifting motor (9) is electrically connected to the PLC controller.

6. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 5, characterized in that: The lifting bracket (18) includes a lifting bracket main body (201). The bottom of the lifting bracket main body (201) is fixed on the pressing mounting frame (19) by screws. A linear guide rail (202) is mounted at the lower part of the lifting bracket main body (201) through an internal hexagonal screw (204). A slider (203) is provided on the linear guide rail (202), and the slider (203) is connected to the side surface of the mounting frame (6).

7. The anti-throwing net automatic lifting device in the construction of bridge piers according to any one of claims 1 to 6, characterized in that: The hoop mechanism (4) further includes a connecting rod (208). The rectangular frames are connected by the connecting rod. The long rod (207) and the short rod (205) are connected by a bracket (206).

8. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 7, characterized in that: A plurality of casters (209) are mounted inside the short rod (205), and the casters (209) move on the surface of the pier.

9. The anti-throwing net automatic lifting device in the construction of bridge piers according to claim 8, characterized in that: The anti-throwing net fixing device (2) further includes an auxiliary support frame (213). One end of the auxiliary support frame (213) is mounted on the lower rectangular frame, and the other end of the auxiliary support frame (213) is mounted on the lower surface of the support frame (210).

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