Municipal road foundation pit safety protection device

Abstract

The invention relates to the technical field of foundation pit protection, in particular to a municipal road foundation pit safety protection device which comprises a stand column, cross rods distributed symmetrically are fixed to the side wall of the stand column and connected with a compaction mechanism, supporting rods are arranged on the sides, away from the stand column, of the cross rods, and one sides of the supporting rods are connected with the cross rods through sliding mechanisms. A supporting plate is fixed to the other side of the supporting rod, a plurality of reinforcing plates which are circumferentially distributed with the center of the supporting plate as the circle center are arranged on the outer side of the supporting plate, an abutting plate is arranged on the side, away from the supporting rod, of the supporting plate, the abutting plate is connected with the reinforcing plates through a transmission mechanism, a main shaft penetrates through the top of the stand column, and the main shaft is rotationally connected with the top of the stand column. On one hand, the main shaft drives the supporting rod to do mirror image motion through the sliding mechanism, and on the other hand, the main shaft compacts the bottom of a foundation pit through the compacting mechanism; when safety protection is carried out on the foundation pit, supporting and compacting can be carried out synchronously, the construction period is shortened, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit protection, in particular to a municipal road foundation pit safety protection device. Background Art

[0002] Municipal road foundation pit engineering is an important part of urban infrastructure construction, involving the construction of roads, bridges, drainage and other facilities. In order to ensure the stability of the foundation pit, it is necessary to support and compact the foundation pit to achieve a safety protection effect.

[0003] In traditional methods, support and compaction are carried out separately, which increases construction time and cost. At the same time, separate operations may result in loose integration of the support structure with the bottom soil layer, affecting the overall stability. In addition, most existing technologies support the inner wall of the foundation pit by steel plates, and the support range is limited, which may cause the edge of the foundation pit or the bottom soil layer to become unstable, affecting the overall safety. Summary of the invention

[0004] The purpose of the present invention is to provide a municipal road foundation pit safety protection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A municipal road foundation pit safety protection device includes a column, a symmetrically distributed cross bar is fixed on the side wall of the column, and the cross bar is connected to a compaction mechanism, wherein a strut is provided on the side of the cross bar away from the column, one side of the strut is connected to the cross bar through a sliding mechanism, and a support plate is fixed on the other side of the strut, a plurality of reinforcing plates are provided on the outer side of the support plate and are distributed in a circle with the center of the support plate as the center, a back plate is provided on the side of the support plate away from the strut, and the back plate is connected to the reinforcing plate through a transmission mechanism, when the back plate is subjected to pressure, the back plate drives the reinforcing plate away from the support plate through the transmission mechanism, a main shaft passes through the top of the column, and the main shaft is rotatably connected to the top of the column, and when the main shaft rotates, on the one hand, the main shaft drives the strut to move in a mirror image through the sliding mechanism, and on the other hand, the main shaft compacts the bottom of the foundation pit through the compaction mechanism.

[0007] Preferably: the compacting mechanism includes a guide column passing through the cross bar, the guide column is fixedly connected to the cross bar, a slide bar passes through the inside of the guide column, a lifting assembly is connected to the top of the slide bar, a compacting plate is fixed to the bottom of the slide bar, a first elastic member is provided on the outside of the slide bar, and the two ends of the first elastic member are respectively fixedly connected to the bottom of the guide column and the top of the compacting plate, wherein a fixing assembly is provided inside the guide column, the lifting assembly is used to drive the slide bar to move upward, and when the slide bar moves to the highest position, the fixing assembly is used to fix the slide bar.

[0008] Preferably: the lifting assembly includes a mounting plate fixedly connected to the main shaft, a first magnet symmetrically distributed with the main shaft as the center line is fixed to the bottom of the mounting plate, and a second magnet is fixed to the top of the sliding rod, wherein the second magnet has opposite magnetic properties to the first magnet.

[0009] Preferably: the fixing assembly includes a block penetrating the side wall of the guide column, the block is slidably connected to the side wall of the guide column, a connecting block is fixed to one end of the block, and the other end of the block is in contact with the side wall of the slide rod, a second elastic member is provided on the outside of the block, and the two ends of the second elastic member are respectively fixedly connected to the connecting block and the outer wall of the guide column, wherein a slot matching the block is provided on the side wall of the slide rod, and the block is connected to a traction component, which is used to pull the block to the outside of the slot.

[0010] Preferably: the traction component includes a fixed rod fixedly connected to the main shaft and symmetrically distributed with the main shaft as the center line, and a third magnet is fixed to the end of the fixed rod away from the main shaft, wherein a fourth magnet is fixedly installed on the side of the connecting block close to the main shaft, and the magnetic properties of the fourth magnet are opposite to those of the third magnet.

[0011] Preferably: the sliding mechanism includes a pneumatic rod fixedly connected to the end of the support rod, a pneumatic groove matched with the pneumatic rod is provided on the side of the cross bar close to the support rod, the pneumatic rod extends into the pneumatic groove and is slidably connected to the pneumatic groove, the pneumatic groove is connected to a booster assembly, the booster assembly is used to increase the air pressure inside the pneumatic groove, wherein a third elastic member is provided on the outside of the pneumatic rod, and both ends of the third elastic member are respectively fixedly connected to the end of the cross bar and the end of the support rod.

[0012] Preferably: the booster assembly includes an air cavity arranged inside the column, the air cavity is connected to a first air pipe, the other end of the first air pipe is connected to the air pressure groove, a piston is slidably connected inside the air cavity, a threaded sleeve is fixed on the top of the piston, a threaded rod is threadedly connected to the top of the threaded sleeve, and the top of the threaded rod is fixedly connected to the bottom of the main shaft.

[0013] Preferably, a limiting block is provided on the side wall of the threaded sleeve, a limiting groove matched with the limiting block is provided on the inner wall of the air cavity, and one end of the limiting block away from the threaded sleeve is located inside the limiting groove and is slidably connected to the limiting groove.

[0014] Preferably: the transmission mechanism includes a conical block fixedly connected to the support plate, a receiving groove matched with the support plate is provided on the side of the support plate close to the support plate, and a groove is provided on the inner wall of the receiving groove, wherein a conical block is provided on the side of the support plate close to the support plate, and a movable rod is fixedly connected to the conical block, and a movable groove matched with the movable rod is provided inside the support rod, and the end of the movable rod away from the conical block extends into the movable groove and is connected to the inner wall of the movable groove through a fourth elastic member, and a support rod is fixed on the side of the reinforcement plate close to the support plate, and one end of the support rod away from the reinforcement plate passes through the side wall of the support plate and extends into the groove, and a fifth elastic member is provided on the outside of the support rod, and both ends of the fifth elastic member are respectively fixedly connected to the side wall of the reinforcement plate and the side wall of the support plate.

[0015] Preferably: a slide groove is provided on the side of the reinforcement plate away from the column, a groove body is provided on the inner wall of the slide groove, a reinforcement rod is slidably connected inside the slide groove, one end of the reinforcement rod is located inside the groove body and is fixedly connected to a stopper, the stopper is adapted to the groove body and is slidably connected to the groove body, wherein the groove body is connected to a second air pipe, and the other end of the second air pipe is connected to the piston groove.

[0016] Compared with the prior art, the invention has the following beneficial effects: when the invention performs safety protection on the foundation pit, the main shaft inside the column is rotated, and while the main shaft is rotating, the bottom of the foundation pit can be compacted by the compaction mechanism, thereby improving the density and bearing capacity of the soil at the bottom of the foundation pit, reducing the sudden risk during construction, and providing a stable foundation for subsequent construction; on the other hand, the two support plates on the side of the column can be closely fitted with the two inner walls of the foundation pit, thereby providing a supporting effect on the foundation pit, and the support and compaction are carried out simultaneously, shortening the construction period and reducing the cost;

[0017] In addition, when the support plate moves, it also drives the abutment plate to move toward the inner wall of the foundation pit. The abutment plate is squeezed by the inner wall of the foundation pit and drives multiple reinforcing plates away from the support plate through the transmission mechanism, so that there is a certain distance between the reinforcing plate and the support plate, thereby increasing the support range of the inner wall of the foundation pit and effectively ensuring the safety protection effect of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the protective device in an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the main shaft structure in an embodiment of the present invention.

[0020] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0021] Figure 4 It is a cross-sectional view of the internal structure of the column in an embodiment of the present invention.

[0022] Figure 5Schematic diagram of the internal structure of the crossbar in an embodiment of the present invention.

[0023] Figure 6 Schematic diagram of the internal structure of the support plate and the support rod in an embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the internal structure of the reinforcement plate in an embodiment of the present invention.

[0025] In the figure: 1-column; 2-compacting mechanism; 21-guide column; 22-sliding rod; 23-first elastic member; 24-compacting plate; 25-first magnet; 26-second magnet; 27-third magnet; 28-fourth magnet; 29-mounting plate; 210-fixing rod; 211-second elastic member; 212-connecting block; 213-block; 3-sliding mechanism; 31-threaded rod; 32-threaded sleeve; 33-limiting block; 34-limiting groove; 35-piston; 36-air cavity; 3 7-air pressure groove; 38-air pressure rod; 39-third elastic member; 310-first air pipe; 4-transmission mechanism; 41-conical block; 42-accommodating groove; 43-groove; 44-support rod; 45-fourth elastic member; 46-movable rod; 47-movable groove; 48-fifth elastic member; 49-second air pipe; 410-slide groove; 411-stop block; 412-reinforcement rod; 413-trough body; 5-cross bar; 6-support rod; 7-support plate; 8-resistance plate; 9-main shaft; 10-reinforcement plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0028] In one embodiment, see Figure 1 and Figure 2, a municipal road foundation pit safety protection device comprises a column 1, a symmetrically distributed cross bar 5 is fixed on the side wall of the column 1, and the cross bar 5 is connected to a compaction mechanism 2, wherein the cross bar 5 is provided with a strut 6 on the side away from the column 1, and one side of the strut 6 is connected to the cross bar 5 through a sliding mechanism 3, and a support plate 7 is fixed on the other side of the strut 6. A plurality of reinforcing plates 10 are provided on the outer side of the support plate 7 and are distributed in a circle with the center of the support plate 7 as the center of the circle. A stop plate 8 is provided on the side of the support plate 7 away from the strut 6, and the stop plate 8 is connected to the reinforcing plate 10 through a transmission mechanism 4. When the stop plate 8 is subjected to pressure, the stop plate 8 drives the reinforcing plate 10 away from the support plate 7 through the transmission mechanism 4. A main shaft 9 runs through the top of the column 1, and the main shaft 9 is rotatably connected to the top of the column 1. When the main shaft 9 rotates, the main shaft 9 drives the strut 6 to move in a mirror image through the sliding mechanism 3 on the one hand, and the main shaft 9 compacts the bottom of the foundation pit through the compaction mechanism 2 on the other hand.

[0029] In this embodiment, when the device is performing safety protection on the road foundation pit, the column 1 is placed at the bottom of the foundation pit, and the support plates 7 on both sides of the column 1 are respectively facing the two inner walls of the foundation pit, and then the main shaft 9 is rotated. While the main shaft 9 is rotating, on the one hand, the bottom of the foundation pit is compacted by the compaction mechanism 2, thereby improving the density and bearing capacity of the soil at the bottom of the foundation pit, reducing the sudden risks during construction, and providing a stable foundation for subsequent construction. While the main shaft 9 is rotating, on the other hand, the two support rods 6 are driven to move through the sliding mechanism 3. The two support rods 6 respectively drive the two support plates 7 to move toward the two inner walls of the foundation pit, and the support plate 7 also drives the resisting plate 8 to move synchronously toward the inner wall of the foundation pit. In this process, the resisting plate 8 first contacts the inner wall of the foundation pit. As the support plate 7 continues to move, the resisting plate 8 is squeezed by the inner wall of the foundation pit and thus transmitted through the transmission The mechanism 4 drives multiple reinforcing plates 10 away from the support plate 7. When the support plate 7 moves to a certain extent relative to the abutment plate 8, the reinforcing plate 10 moves to the maximum extent. At this time, even if the support plate 7 continues to move relative to the abutment plate 8, the reinforcing plate 10 will not move, thereby ensuring the stability of the reinforcing plate 10. When the side wall of the support plate 7 fits with the inner wall of the foundation pit, the reinforcing plate 10 fits with the inner wall of the foundation pit synchronously, and there is a certain distance between the reinforcing plate 10 and the support plate 7, thereby increasing the support range of the inner wall of the foundation pit, effectively ensuring the safety protection effect of the foundation pit, and the support and compaction are carried out simultaneously, shortening the construction period and reducing costs. In order to facilitate the staff to rotate the main shaft 9, a handle can be set on the outside of the main shaft 9, or a nut can be fixedly installed on the top of the main shaft 9, and the nut is driven to rotate by a wrench, thereby driving the main shaft 9 to rotate.

[0030] See also Figure 1The compacting mechanism 2 includes a guide column 21 that passes through the cross bar 5, the guide column 21 is fixedly connected to the cross bar 5, a slide bar 22 passes through the guide column 21, a lifting assembly is connected to the top of the slide bar 22, a compacting plate 24 is fixed to the bottom of the slide bar 22, a first elastic member 23 is provided on the outside of the slide bar 22, and the two ends of the first elastic member 23 are respectively fixedly connected to the bottom of the guide column 21 and the top of the compacting plate 24, wherein a fixing assembly is provided inside the guide column 21, the lifting assembly is used to drive the slide bar 22 to move upward, and when the slide bar 22 moves to the highest position, the fixing assembly is used to fix the slide bar 22;

[0031] When the device supports the foundation pit, the main shaft 9 is rotated. While the main shaft 9 is rotating, the sliding rod 22 is first driven by the lifting mechanism to move upward inside the guide column 21. The sliding rod 22 drives the compacting plate 24 to move upward. While the compacting plate 24 moves upward, it squeezes the first elastic member 23, so that the first elastic member 23 is in a compressed state. The first elastic member 23 can be a spring. When the compacting plate 24 moves to the highest position, the fixing component inside the guide column 21 will automatically fix the sliding rod 22, thereby fixing the compacting plate 24. As the main shaft 9 continues to rotate, even if the lifting mechanism no longer lifts the sliding rod 22, the sliding rod 22 will not be moved under the action of the fixing component. The dynamic compaction plate 24 moves downward. When the main shaft 9 rotates to a certain extent, the fixing assembly automatically releases the fixation of the slide bar 22. At this time, the first elastic member 23 releases the elastic potential energy, and the compaction plate 24 moves downward rapidly under the action of the first elastic member 23, thereby compacting the bottom of the foundation pit. As the main shaft 9 continues to rotate, the lifting mechanism drives the compaction plate 24 to move upward through the slide bar 22 again, and the compaction plate 24 is separated from the bottom of the foundation again. This cycle is repeated, so that the compaction plate 24 can continuously hit the bottom of the foundation while the main shaft 9 rotates, thereby compacting the bottom of the foundation, improving the soil density and bearing capacity at the bottom of the foundation pit, reducing sudden risks during construction, and providing a stable foundation for subsequent construction.

[0032] See also Figure 2 and Figure 3 The lifting assembly includes a mounting plate 29 fixedly connected to the main shaft 9, a first magnet 25 symmetrically distributed with the main shaft 9 as the center line is fixed to the bottom of the mounting plate 29, and a second magnet 26 is fixed to the top of the slide bar 22, wherein the second magnet 26 has opposite magnetic properties to the first magnet 25;

[0033] When the foundation pit is safely protected, the main shaft 9 is rotated. The main shaft 9 drives the mounting plate 29 to rotate while the main shaft 9 drives the first magnet 25 at the bottom thereof to perform circular motion with the main shaft 9 as the center. When the main shaft 9 rotates to a certain extent, the first magnet 25 at the bottom of the mounting plate 29 rotates to the top of the second magnet 26. At this time, the first magnet 25 and the second magnet 26 attract each other, so that the second magnet 26 drives the compacting plate 24 to move upward through the slide bar 22. When the compacting plate 24 moves to the highest position, the fixing component inside the guide column 21 automatically fixes the slide bar 22. As the main shaft 9 continues to rotate, the fixing component no longer fixes the slide bar 22. The first elastic member 23 releases its elastic potential energy, and the compacting plate 24 moves downward rapidly under the action of the first elastic member 23, thereby compacting the bottom of the foundation pit, effectively ensuring the compaction effect on the bottom of the foundation.

[0034] See also Figure 2 and Figure 3 The fixing assembly includes a block 213 that penetrates the side wall of the guide column 21, and the block 213 is slidably connected to the side wall of the guide column 21. A connecting block 212 is fixed to one end of the block 213, and the other end of the block 213 is in contact with the side wall of the slide bar 22. A second elastic member 211 is provided outside the block 213, and the two ends of the second elastic member 211 are respectively fixedly connected to the connecting block 212 and the outer wall of the guide column 21, wherein a slot that matches the block 213 is provided on the side wall of the slide bar 22, and the block 213 is connected to a traction component, which is used to pull the block 213 to the outside of the slot;

[0035] When the main shaft 9 rotates to a certain position, the traction component automatically pulls the block 213 to the outside of the slot, loses the support and fixation of the block 213, and the first elastic member 23 releases the elastic potential energy. The compacting plate 24 moves downward rapidly under the action of the first elastic member 23, thereby compacting the bottom of the foundation pit and effectively ensuring the compaction effect on the bottom of the foundation.

[0036] See also Figure 2 and Figure 3The traction component includes a fixed rod 210 fixedly connected to the main shaft 9 and symmetrically distributed with the main shaft 9 as the center line, and a third magnet 27 is fixed to the end of the fixed rod 210 away from the main shaft 9, wherein a fourth magnet 28 is fixedly installed on the side of the connecting block 212 close to the main shaft 9, and the magnetic properties of the fourth magnet 28 are opposite to those of the third magnet 27;

[0037] When the compacting plate 24 moves to the highest position, the block 213 automatically enters the slot on the side wall of the slide bar 22 under the action of the connecting block 212 and the second elastic member 211, thereby fixing the slide bar 22. As the main shaft 9 continues to rotate, the main shaft 9 also drives the third magnet 27 to move in a circle through the fixing rod 210. When the third magnet 27 moves to a certain position, the third magnet 27 and the fourth magnet 28 attract each other, so that the fourth magnet 28 moves the block 213 to the outside of the slot through the connecting block 212, thereby releasing the block 213 from fixing the slide bar 22. At this time, the first elastic member 23 releases its elastic potential energy, and the compacting plate 24 moves downward rapidly under the action of the first elastic member 23, thereby compacting the bottom of the foundation pit, effectively ensuring the compaction effect on the bottom of the foundation.

[0038] See also Figure 5 The sliding mechanism 3 includes a pneumatic rod 38 fixedly connected to the end of the support rod 6, and a pneumatic groove 37 adapted to the pneumatic rod 38 is provided on the side of the cross bar 5 close to the support rod 6. The pneumatic rod 38 extends into the inside of the pneumatic groove 37 and is slidably connected to the pneumatic groove 37. The pneumatic groove 37 is connected to a booster assembly, which is used to increase the air pressure inside the pneumatic groove 37, wherein a third elastic member 39 is provided outside the pneumatic rod 38, and the two ends of the third elastic member 39 are respectively fixedly connected to the end of the cross bar 5 and the end of the support rod 6;

[0039] When the road foundation pit is safely protected, the main shaft 9 is rotated. While the main shaft 9 is rotating, the air pressure inside the air pressure groove 37 is increased through the booster assembly. The air pressure inside the air pressure groove 37 increases, thereby pushing the air pressure rod 38. The air pressure rod 38 drives the support plate 7 away from the column 1 through the support rod 6 until the two support plates 7 on the sides of the column 1 are tightly fitted with the two inner walls of the foundation pit respectively. At this time, the inner wall of the foundation pit is supported by the two support plates 7, which can effectively improve the safety protection effect of the foundation pit. The third elastic member 39 can be a spring. When the air pressure inside the air pressure groove 37 is reduced, the third elastic member 39 can reset the support rod 6 and the support plate 7 through the air pressure rod 38. The air pressure rod 38 drives the support rod 6 to move relative to each other, thereby changing the distance between the two support plates 7, so that the two support plates 7 can support the inner walls of the foundation pits of different widths, effectively improving the application range of the device.

[0040] See also Figure 1 , Figure 4 and Figure 5 The booster assembly includes an air cavity 36 disposed inside the column 1, the air cavity 36 is connected to a first air pipe 310, the other end of the first air pipe 310 is connected to an air pressure groove 37, a piston 35 is slidably connected inside the air cavity 36, a threaded sleeve 32 is fixed to the top of the piston 35, a threaded rod 31 is threadedly connected to the top of the threaded sleeve 32, and the top of the threaded rod 31 is fixedly connected to the bottom of the main shaft 9;

[0041] When the foundation pit is safely protected, the main shaft 9 is rotated. The main shaft 9 drives the threaded rod 31 to rotate while the main shaft 9 rotates. The threaded rod 31 drives the piston 35 to slide inside the air cavity 36 through the threaded connection with the threaded sleeve 32. The piston 35 moves and squeezes the gas inside the air cavity 36. The gas inside the air cavity 36 enters the air pressure groove 37 through the first air pipe 310, thereby increasing the air pressure inside the air pressure groove 37 and squeezing the air pressure rod 38, so that the air pressure rod 38 drives the support plate 7 to approach the inner wall of the foundation pit through the support rod 6 until the support plate 7 is tightly fitted with the inner wall of the foundation pit, wherein the air cavity 36 and the first air pipe 310 are connected to the support plate 7. It is arranged that when the support plate 7 on one side of the column 1 fits with the inner wall of the foundation pit, the gas inside the air cavity 36 will also enter the air pressure groove 37 inside the cross bar 5 on the other side of the column 1 through another first air pipe 310, so that the support rod 6 on the other side of the column 1 continues to drive the other support plate 7 to move toward the other inner wall of the foundation pit until the other support plate 7 fits tightly with the other side wall of the foundation pit. That is, when the present invention is used to safely protect the foundation pit, it is not necessary to place the column 1 in the middle position of the foundation pit, so that the support plates 7 on both sides of the column 1 can fit tightly with the two inner walls of the foundation pit respectively, which is convenient for the staff to quickly protect the road foundation pit.

[0042] See also Figure 4 A limit block 33 is provided on the side wall of the threaded sleeve 32, and a limit groove 34 adapted to the limit block 33 is provided on the inner wall of the air cavity 36. One end of the limit block 33 away from the threaded sleeve 32 is located inside the limit groove 34 and is slidably connected to the limit groove 34;

[0043] When the threaded sleeve 32 moves, it drives the limit block 33 to move inside the limit groove 34. The limit groove 34 limits the threaded sleeve 32 through the limit block 33, avoiding the phenomenon that the threaded sleeve 32 is driven by the rotation of the threaded rod 31, thereby ensuring the stability of the threaded sleeve 32 when moving.

[0044] See also Figure 6, the transmission mechanism 4 includes a conical block 41 fixedly connected to the butt plate 8, a receiving groove 42 adapted to the butt plate 8 is provided on the side of the support plate 7 close to the butt plate 8, and a groove 43 is provided on the inner wall of the receiving groove 42, wherein a conical block 41 is provided on the side of the butt plate 8 close to the support plate 7, and a movable rod 46 is fixedly connected to the conical block 41, and a movable groove 47 adapted to the movable rod 46 is provided inside the support rod 6, and the end of the movable rod 46 away from the conical block 41 extends into the movable groove 47 and is connected to the inner wall of the movable groove 47 through a fourth elastic member 45, and a support rod 44 is fixed on the side of the reinforcing plate 10 close to the support plate 7, and the end of the support rod 44 away from the reinforcing plate 10 penetrates the side wall of the support plate 7 and extends to the inside of the groove 43, and a fifth elastic member 48 is provided on the outside of the support rod 44, and the two ends of the fifth elastic member 48 are respectively fixedly connected to the side wall of the reinforcing plate 10 and the side wall of the support plate 7;

[0045] When the foundation pit is safely protected, the support plate 7 drives the abutment plate 8 to move toward the inner wall of the foundation pit. During this process, the abutment plate 8 first contacts the inner wall of the foundation pit. As the support plate 7 continues to move, the abutment plate 8 is squeezed by the inner wall of the foundation pit, so that the conical block 41 moves toward the inside of the groove 43. When the conical block 41 enters the inside of the groove 43, the inclined surface of the conical block 41 will squeeze the end of the support rod 44, so that the support rod 44 drives the reinforcing plate 10 away from the support plate 7. When the conical block 41 squeezes the support rod 44 to a certain extent, the squeezing degree of the conical block 41 on the support rod 44 will not change, and the reinforcing plate 10 moves to the maximum extent. At this time, even if the support plate 7 continues to move relative to the abutment plate 8, the reinforcing plate 10 will not move, thereby ensuring the stability of the reinforcing plate 10. When the side wall of the support plate 7 is in contact with the inner wall of the foundation pit, the reinforcing plate 10 is synchronously fitted with the inner wall of the foundation pit, and there is a certain distance between the reinforcing plate 10 and the supporting plate 7, thereby increasing the support range of the inner wall of the foundation pit, effectively ensuring the safety protection effect of the foundation pit, and when the supporting plate 7 is fitted with the inner wall of the foundation pit, the push plate 8 moves to the outside of the accommodating groove 42, and the accommodating groove 42 has a storage effect on the push plate 8, so that the push plate 8 is aligned with the side wall of the support plate 7, effectively improving the protection effect of the foundation pit, wherein the movable groove 47 has a supporting and limiting effect on the conical block 41 through the movable rod 46, effectively improving the stability of the conical block 41 when moving, the fourth elastic member 45 and the fifth elastic member 48 can both be springs, when the push plate 8 is no longer subjected to pressure, the conical block 41 automatically resets under the action of the fourth elastic member 45, and the reinforcing plate 10 automatically resets under the action of the fifth elastic member 48.

[0046] See also Figure 6 and Figure 7A slide groove 410 is provided on the side of the reinforcing plate 10 away from the column 1, and a groove body 413 is provided on the inner wall of the slide groove 410. A reinforcing rod 412 is slidably connected inside the slide groove 410, and one end of the reinforcing rod 412 is located inside the groove body 413 and fixedly connected with a stopper 411, and the stopper 411 is adapted to the groove body 413 and slidably connected to the groove body 413, wherein the groove body 413 is connected to a second air pipe 49, and the other end of the second air pipe 49 is connected to the piston 35 groove;

[0047] When the conical block 41 enters the groove 43, it also drives the movable rod 46 to move inside the movable groove 47. The movable rod 46 squeezes the gas inside the movable groove 47, so that the gas inside the movable groove 47 enters the groove body 413 inside the reinforcing plate 10 through the second air pipe 49. The second air pipe 49 can be a hose. The air pressure inside the groove body 413 increases and squeezes the block 411. The block 411 drives the reinforcing rod 412 to move to the outside of the slide groove 410, so that the reinforcing rod 412 can be inserted into the inner wall of the foundation pit, which improves the density of the soil on the side wall of the foundation pit on the one hand, and on the other hand The stability between the reinforcing plate 10 and the inner wall of the foundation pit is improved, and the protective effect of the foundation pit is further guaranteed. When the device is used up, the reinforcing plate 10 can automatically reset under the action of the fifth elastic member 48, so that the support rod 44 squeezes the inclined surface of the conical block 41, and the conical block 41 drives the movable rod 46 to move inside the movable groove 47, and negative pressure is generated inside the movable groove 47, and negative pressure is simultaneously generated inside the groove body 413. At this time, the block 411 drives the reinforcing rod 412 to move into the slide groove 410, avoiding the reinforcing rod 412 extending to the outside of the slide groove 410 to cause damage to the staff.

[0048] Working principle: When the device is used for safety protection of a road foundation pit, the column 1 is placed at the bottom of the foundation pit, and the support plates 7 on both sides of the column 1 are respectively facing the two inner walls of the foundation pit, and then the main shaft 9 is rotated. The main shaft 9 drives the mounting plate 29 and the fixing rod 210 to rotate while the main shaft 9 rotates. When the first magnet 25 at the bottom of the mounting plate 29 rotates to the top of the second magnet 26, the first magnet 25 and the second magnet 26 attract each other, so that the second magnet 26 drives the compacting plate 24 to move upward through the slide bar 22. The compacting plate 24 moves upward and squeezes the first elastic member 23, so that the first elastic member 23 is in a compressed state. When the compacting plate 24 moves to the highest position, the block 213 is aligned with the slot on the side wall of the slide bar 22. The block 213 Under the action of the connecting block 212 and the second elastic member 211, its end automatically enters the slot, and the block 213 fixes the slide bar 22 through the slot, and then fixes the compacting plate 24. As the main shaft 9 continues to rotate, the third magnet 27 at the end of the fixing rod 210 will attract the fourth magnet 28, so that the fourth magnet 28 moves the block 213 to the outside of the slot through the connecting block 212, thereby releasing the fixation of the block 213 to the slide bar 22. At this time, the first elastic member 23 releases its elastic potential energy, and the compacting plate 24 moves downward rapidly under the action of the first elastic member 23. This cycle is repeated, so that the compacting plate 24 can continuously hit the bottom of the foundation while the main shaft 9 rotates, thereby The top of the foundation pit is compacted, which improves the soil density and bearing capacity at the bottom of the foundation pit, reduces the risk of sudden accidents during construction, and provides a stable foundation for subsequent construction. In addition, the main shaft 9 also drives the threaded rod 31 to rotate while the main shaft 9 rotates. The threaded rod 31 drives the piston 35 to slide inside the air cavity 36 through the threaded connection with the threaded sleeve 32 while the main shaft 9 rotates. The piston 35 squeezes the gas inside the air cavity 36 while the piston 35 moves. The gas inside the air cavity 36 enters the air pressure groove 37 through the first air pipe 310, thereby increasing the air pressure inside the air pressure groove 37 and squeezing the air pressure rod 38, thereby causing the air pressure rod 38 to drive the support plate 7 to approach the inner wall of the foundation pit through the support rod 6, until the two support plates 7 on the sides of the column 1 are tightly fitted with the two inner walls of the foundation pit respectively. At this time, the two support plates 7 are used to press the inner wall of the foundation pit. The support plate 7 is supported by the wall, which can effectively improve the safety protection effect of the foundation pit, and the support plate 7 moves while driving the abutment plate 8 to move toward the inner wall of the foundation pit. In this process, the abutment plate 8 first contacts the inner wall of the foundation pit. As the support plate 7 continues to move, the abutment plate 8 is squeezed by the inner wall of the foundation pit, so that the conical block 41 moves toward the inside of the groove 43. When the conical block 41 enters the inside of the groove 43, the inclined surface of the conical block 41 squeezes the end of the support rod 44, so that the support rod 44 drives the reinforcing plate 10 away from the support plate 7. When the conical block 41 squeezes the support rod 44 to a certain extent, the squeezing degree of the conical block 41 on the support rod 44 will not change, and the reinforcing plate 10 moves to the maximum extent. At this time, even if the support plate 7 continues to move relative to the abutment plate 8,The reinforcing plate 10 will not move, which ensures the stability of the reinforcing plate 10. When the side wall of the support plate 7 is in contact with the inner wall of the foundation pit, the reinforcing plate 10 is in contact with the inner wall of the foundation pit at the same time, and there is a certain distance between the reinforcing plate 10 and the support plate 7, thereby increasing the support range of the inner wall of the foundation pit and effectively ensuring the safety protection effect of the foundation pit. The movable groove 47 plays a supporting and limiting role on the conical block 41 through the movable rod 46, which effectively improves the stability of the conical block 41 when it moves. The gas inside the movable groove 47 will be squeezed, so that the gas inside the movable groove 47 enters the groove body 413 inside the reinforcing plate 10 through the second air pipe 49. The gas pressure inside the groove body 413 increases and squeezes the block 411. The block 411 drives the reinforcing rod 412 to move to the outside of the slide groove 410, so that the reinforcing rod 412 can be inserted into the inner wall of the foundation pit. On the one hand, the density of the soil on the side wall of the foundation pit is improved, and on the other hand, the stability between the reinforcing plate 10 and the inner wall of the foundation pit is improved, further ensuring the protection effect of the foundation pit.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A municipal road foundation pit safety protection device, comprising a column; characterized in that: A symmetrically distributed cross bar is fixed on the side wall of the column, and the cross bar is connected to a compaction mechanism, wherein a strut is provided on the side of the cross bar away from the column, one side of the strut is connected to the cross bar by a sliding mechanism, and a support plate is fixed on the other side of the strut, a plurality of reinforcing plates are provided on the outer side of the support plate and are distributed in a circle with the center of the support plate as the center, a back plate is provided on the side of the support plate away from the strut, and the back plate is connected to the reinforcing plate by a transmission mechanism, when the back plate is subjected to pressure, the back plate drives the reinforcing plate away from the support plate through the transmission mechanism, a main shaft passes through the top of the column, and the main shaft is rotatably connected to the top of the column, and when the main shaft rotates, on the one hand, the main shaft drives the strut to move in a mirror image through the sliding mechanism, and on the other hand, the main shaft compacts the bottom of the foundation pit through the compaction mechanism.

2. The municipal road foundation pit safety protection device according to claim 1 is characterized in that: The compacting mechanism includes a guide column passing through a cross bar, the guide column is fixedly connected to the cross bar, a slide bar passes through the guide column, a lifting assembly is connected to the top of the slide bar, a compacting plate is fixed to the bottom of the slide bar, a first elastic member is provided on the outside of the slide bar, and both ends of the first elastic member are respectively fixedly connected to the bottom of the guide column and the top of the compacting plate, wherein a fixing assembly is provided inside the guide column, the lifting assembly is used to drive the slide bar to move upward, and when the slide bar moves to the highest position, the fixing assembly is used to fix the slide bar.

3. The municipal road foundation pit safety protection device according to claim 2 is characterized in that: The lifting assembly includes a mounting plate fixedly connected to the main shaft, a first magnet symmetrically distributed with the main shaft as the center line is fixed to the bottom of the mounting plate, and a second magnet is fixed to the top of the sliding rod, wherein the second magnet has opposite magnetic properties to the first magnet.

4. The municipal road foundation pit safety protection device according to claim 2 is characterized in that: The fixing assembly includes a block penetrating the side wall of the guide column, the block is slidably connected to the side wall of the guide column, a connecting block is fixed to one end of the block, and the other end of the block is in contact with the side wall of the slide rod, a second elastic member is provided on the outside of the block, and the two ends of the second elastic member are respectively fixedly connected to the connecting block and the outer wall of the guide column, wherein a slot matching the block is provided on the side wall of the slide rod, and the block is connected to a traction component, which is used to pull the block to the outside of the slot.

5. The municipal road foundation pit safety protection device according to claim 4 is characterized in that: The traction component includes a fixed rod fixedly connected to the main shaft and symmetrically distributed with the main shaft as the center line, and a third magnet is fixed to the end of the fixed rod away from the main shaft, wherein a fourth magnet is fixedly installed on the side of the connecting block close to the main shaft, and the magnetic properties of the fourth magnet are opposite to those of the third magnet.

6. The municipal road foundation pit safety protection device according to claim 1 is characterized in that: The sliding mechanism includes a pneumatic rod fixedly connected to the end of the support rod, and a pneumatic groove adapted to the pneumatic rod is provided on the side of the cross bar close to the support rod. The pneumatic rod extends into the interior of the pneumatic groove and is slidably connected to the pneumatic groove. The pneumatic groove is connected to a booster assembly, which is used to increase the air pressure inside the pneumatic groove, wherein a third elastic member is provided on the outside of the pneumatic rod, and both ends of the third elastic member are respectively fixedly connected to the end of the cross bar and the end of the support rod.

7. The municipal road foundation pit safety protection device according to claim 6 is characterized in that: The booster assembly includes an air cavity arranged inside the column, the air cavity is connected to a first air pipe, the other end of the first air pipe is connected to the air pressure groove, a piston is slidably connected inside the air cavity, a threaded sleeve is fixed on the top of the piston, a threaded rod is threadedly connected to the top of the threaded sleeve, and the top of the threaded rod is fixedly connected to the bottom of the main shaft.

8. The municipal road foundation pit safety protection device according to claim 7 is characterized in that: A limiting block is arranged on the side wall of the threaded sleeve, a limiting groove matched with the limiting block is arranged on the inner wall of the air cavity, and one end of the limiting block away from the threaded sleeve is located inside the limiting groove and is slidably connected with the limiting groove.

9. The municipal road foundation pit safety protection device according to claim 1, characterized in that: The transmission mechanism includes a conical block fixedly connected to the support plate, a receiving groove adapted to the support plate is provided on the side of the support plate close to the support plate, and a groove is provided on the inner wall of the receiving groove, wherein a conical block is provided on the side of the support plate close to the support plate, and a movable rod is fixedly connected to the conical block, and a movable groove adapted to the movable rod is provided inside the support rod, and one end of the movable rod away from the conical block extends into the movable groove and is connected to the inner wall of the movable groove through a fourth elastic member, and a support rod is fixedly provided on the side of the reinforcement plate close to the support plate, and one end of the support rod away from the reinforcement plate penetrates the side wall of the support plate and extends into the groove, and a fifth elastic member is provided on the outside of the support rod, and both ends of the fifth elastic member are respectively fixedly connected to the side wall of the reinforcement plate and the side wall of the support plate.

10. The municipal road foundation pit safety protection device according to claim 9, characterized in that: A slide groove is provided on the side of the reinforcement plate away from the column, and a groove body is provided on the inner wall of the slide groove. A reinforcement rod is slidably connected to the inside of the slide groove, one end of the reinforcement rod is located inside the groove body and fixedly connected to a stopper, the stopper is adapted to the groove body and slidably connected to the groove body, wherein the groove body is connected to a second air pipe, and the other end of the second air pipe is connected to the piston groove.

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