Foundation pit safety protection device for municipal road

Abstract

The invention discloses a foundation pit safety protection device for municipal roads, and relates to the technical field of construction protection, the foundation pit safety protection device comprises two stand columns and a cross beam, the two ends of the cross beam are connected with the tops of the two stand columns respectively, the bottoms of the two stand columns are jointly connected with a bottom plate, and a plurality of parallel rotating shafts are rotatably connected between the cross beam and the bottom plate; when wind power is large, by means of the narrow pipe effect and the Bernoulli principle, the movable plates in the grooves are pressed to slide to extrude the stop blocks at the groove openings, the piston plates are triggered to slide upwards, and through meshing transmission of the spur racks and the gears and meshing transmission of the first bevel gears and the second bevel gears, the movable plates are driven to rotate, so that the wind power is increased, and the working efficiency is improved. All the rotating shafts rotate by 90 degrees and drive the protection plates to rotate together, so that the wind area of the whole device is reduced, the wind resistance is reduced, the device is prevented from being blown down by strong wind, and the stability of the device in severe weather is improved.

Description

Technical Field

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

[0002] The foundation pit is an earth pit excavated at the foundation design position according to the base elevation and foundation plane dimensions. During the construction of municipal road projects, in order to ensure the safety of the environment around the foundation pit, it is necessary to adopt support and other protective measures for the environment around the foundation pit.

[0003] Most of the existing safety protection devices for foundation pits are composed of a whole protection plate and a bracket. Since the protection plate is a rigid integral structure, when pedestrians and vehicles collide with its surface, it is easy to cause serious injuries due to the lack of buffering. The protection plate may also tilt inward and fall into the foundation pit, causing harm to construction workers. When encountering strong winds, the entire surface of the protection plate faces the wind and is subject to greater wind pressure, making it very easy to tilt and affect road traffic. Therefore, a safety protection device for foundation pits for municipal roads is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a foundation pit safety protection device for municipal roads.

[0005] A foundation pit safety protection device for a municipal road comprises two columns and a crossbeam, wherein the two ends of the crossbeam are respectively connected to the tops of the two columns, and the bottoms of the two columns are commonly connected to a base plate, and a plurality of mutually parallel rotating shafts are rotatably connected between the crossbeam and the base plate, and a protective plate is installed on each of the rotating shafts, and an adjustment mechanism is arranged in one of the columns for controlling the rotation of the protective plate to play a windproof role.

[0006] Preferably, the adjusting mechanism comprises a main shaft and a piston plate, one of the columns is provided with a through vent, the column is provided with a cavity above the vent, the piston plate is sealingly and slidingly connected to the cavity wall of the cavity, the cross beam is a hollow structure, the main shaft is rotatably connected to both ends of the cross beam, a plurality of first bevel gears are coaxially connected to the main shaft at equal distances, the upper end of each rotating shaft extends into the cross beam and is coaxially connected to a second bevel gear, the plurality of first bevel gears are respectively meshed with a plurality of second bevel gears, one end of the main shaft extends into the cavity and is coaxially connected to a gear, a connecting rod is connected to the piston plate, a spur rack is connected to the connecting rod, and the spur rack is meshed with the gear.

[0007] Preferably, a groove is provided on the inner wall of the vent, and a movable plate is sealingly and slidably connected in the groove, a first spring is connected on the movable plate, the other end of the first spring is connected to the top groove wall of the groove, the top groove wall of the groove is connected to an inflation hole and communicates with the cavity, an exhaust hole is provided on the movable plate, and a one-way valve is provided in the inflation hole and the exhaust hole, a pair of blocks are provided at the notch of the groove, a sliding groove is provided on one side wall of the cavity, a card block is slidably connected in the sliding groove, one end of the card block located in the sliding groove is connected to a conductive spring, piezoelectric ceramics are provided on the block, and the piezoelectric ceramics are electrically connected to the conductive spring through a wire, the upper end of the connecting rod is connected to a second spring, and the upper end of the second spring is connected to the top cavity wall of the cavity.

[0008] Preferably, three telescopic boxes are connected to the back of each of the protective plates, three telescopic blocks are connected to each of the rotating shafts, the telescopic boxes are sealed and slidably connected to the telescopic blocks, a plurality of third springs are connected between the protective plates and the rotating shafts, an axial cavity is defined in each of the rotating shafts, a bottom hole is defined at the bottom of the rotating shaft that is connected to the axial cavity, a lifting block is sealed and slidably connected to the bottom of the axial cavity, an insertion rod is connected to the bottom of the lifting block, and a connecting hole is defined on each of the telescopic blocks that is connected to the axial cavity.

[0009] Preferably, a guide groove is provided at the bottom of each protective plate, a plurality of guide blocks are connected to the bottom plate, each guide block is slidably connected to the guide groove on the corresponding protective plate, and a notch is provided on the front side of each protective plate to communicate with the guide groove.

[0010] Preferably, the one-way valve at the inflation hole only allows gas to flow from the groove into the cavity, the one-way valve at the exhaust hole only allows gas to flow from below the movable plate to above, and a limiting block is connected to one side wall of the cavity.

[0011] Preferably, both ends of the vent are configured to be trumpet-shaped.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. When a pedestrian or a vehicle touches the protective plate, the present invention will buffer the contact between the pedestrian and the vehicle and reduce the damage to the pedestrian and the vehicle. At the same time, when the protective plate compresses the third spring, the air in the telescopic box will be pressed into the shaft cavity through the connecting hole, so that the air pressure in the shaft cavity is increased, and the lifting block and the insertion rod are pushed down and inserted into the ground, thereby increasing the anti-dumping ability of the entire device.

[0014] 2. When the wind is strong, the present invention utilizes the narrow tube effect and Bernoulli's principle to make the movable plate in the groove slide under pressure to squeeze the block at the groove mouth, triggering the piston plate to slide up, and through the meshing transmission of the spur rack and the gear and the meshing transmission of the first bevel gear and the second bevel gear, all the rotating shafts will rotate 90 degrees, and will drive the protective plate to rotate together, thereby reducing the wind-exposed area of ​​the entire device, reducing wind resistance, preventing the device from being blown down by strong winds, and improving the stability of the device in severe weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a structural cross-sectional view of the crossbeam part in the present invention.

[0017] Figure 3 It is a structural cross-sectional view of the middle column of the present invention.

[0018] Figure 4 for Figure 3 Enlarged schematic diagram at point A in the middle.

[0019] Figure 5 It is a structural cross-sectional view of the connection between the rotating shaft and the protective plate in the present invention.

[0020] Figure 6 for Figure 5 Enlarged schematic diagram of point B in the middle.

[0021] Figure 7 It is a schematic diagram for comparing the protection plate and the rotating shaft before and after the rotation state in the present invention.

[0022] In the figure: 1 column, 11 vent, 12 cavity, 13 groove, 131 movable plate, 132 first spring, 133 inflation hole, 134 exhaust hole, 135 block, 14 piston plate, 15 connecting rod, 151 second spring, 16 gear, 17 spur rack, 18 slide groove, 181 block, 19 limit block, 2 beam, 21 main shaft, 22 first bevel gear, 23 second bevel gear, 3 bottom plate, 4 rotating shaft, 41 shaft cavity, 42 bottom hole, 43 lifting block, 44 plug rod, 5 protective plate, 51 telescopic box, 52 telescopic block, 53 connecting hole, 54 third spring, 55 guide groove, 56 guide block, 57 notch. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] Reference Figure 1-7As shown, a foundation pit safety protection device for a municipal road comprises two columns 1 and a crossbeam 2, wherein the two ends of the crossbeam 2 are respectively connected to the tops of the two columns 1, and the bottoms of the two columns 1 are commonly connected to a bottom plate 3, and a plurality of mutually parallel rotating shafts 4 are rotatably connected between the crossbeam 2 and the bottom plate 3, and a protective plate 5 is installed on each of the rotating shafts 4, and an adjusting mechanism is arranged in one of the columns 1 for controlling the rotation of the protective plate 5 to play a windproof role.

[0025] In this embodiment, the adjusting mechanism includes a main shaft 21 and a piston plate 14, one of the columns 1 is provided with a through vent 11, the column 1 is provided with a cavity 12 above the vent 11, the piston plate 14 is sealingly and slidingly connected to the cavity wall of the cavity 12, the crossbeam 2 is a hollow structure, the main shaft 21 is rotatably connected to both ends of the crossbeam 2, a plurality of first bevel gears 22 are coaxially connected to the main shaft 21 at equal distances, the upper end of each of the rotating shafts 4 extends into the crossbeam 2 and is coaxially connected to a second bevel gear 23, the plurality of first bevel gears 22 are respectively meshed with the plurality of second bevel gears 23, the gear ratio of the first bevel gear 22 to the second bevel gear 23 is 1:1, one end of the main shaft 21 extends into the cavity 12 and is coaxially connected to a gear 16, a connecting rod 15 is connected to the piston plate 14, a spur rack 17 is connected to the connecting rod 15, and the spur rack 17 is meshed with the gear 16.

[0026] In this embodiment, a groove 13 is provided on the inner wall of the vent 11, and a movable plate 131 is sealed and slidably connected in the groove 13. A first spring 132 is connected to the movable plate 131, and the other end of the first spring 32 is connected to the top groove wall of the groove 13. The top groove wall of the groove 13 is connected to an inflation hole 133 that is connected to the cavity 12. An air extraction hole 134 is provided on the movable plate 131, and a one-way valve is provided in the inflation hole 133 and the air extraction hole 134. A pair of blocks 135 are provided at the notch of the groove 13. A slide groove 18 is provided on one side of the cavity wall of the cavity 12, and a sliding connection 134 is provided in the slide groove 18. A card block 181 is connected, and one end of the card block 181 located in the slide slot 18 is connected to a conductive spring. A piezoelectric ceramic is arranged on the block 135, and the piezoelectric ceramic is electrically connected to the conductive spring through a wire. The piezoelectric ceramic will generate current when it is compressed, and the conductive spring will shrink and pull the card block 181 back into the slide slot 18 after being energized. The upper end of the connecting rod 15 is connected to a second spring 151, and the upper end of the second spring 151 is connected to the top cavity wall of the cavity 12. A pressure relief valve is arranged on one side cavity wall of the bottom space of the cavity 12 and the outer end of the column. After the windy weather is over, the worker can manually open the pressure relief valve to release the air stored in the cavity 12.

[0027] In this embodiment, three telescopic boxes 51 are connected to the back of each of the protective plates 5, and three telescopic blocks 52 are connected to each of the rotating shafts 4. The telescopic boxes 51 are sealed and slidably connected to the telescopic blocks 52. A plurality of third springs 54 are connected between the protective plates 5 and the rotating shafts 4. An axial cavity 41 is provided in each of the rotating shafts 4, and a bottom hole 42 is provided at the bottom of the rotating shaft 4 to communicate with the axial cavity 41. A lifting block 43 is sealed and slidably connected to the bottom of the axial cavity 41, and an insert rod 44 is connected to the bottom of the lifting block 43. A connecting hole 53 is provided on each of the telescopic blocks 52 to communicate with the axial cavity 41.

[0028] In this embodiment, a guide groove 55 is provided at the bottom of each of the protective plates 5, and a plurality of guide blocks 56 are connected to the bottom plate 3. Each of the guide blocks 56 is slidably connected to the guide groove 55 on the corresponding protective plate 5. A notch 57 is provided on the front side of each of the protective plates 5 to communicate with the guide groove 55. The guide groove 55 is a linear groove, and the guide block 56 and a limit block 19 are connected to the cavity wall on one side of the cavity 12. The distance from the piston plate 14 sliding from the block 181 to the limit block 19 is just enough to make the spur rack 17 slide up and engage to drive the gear 16 and the rotating shaft 21 to rotate 90°.

[0029] In this embodiment, the one-way valve at the inflation hole 133 only allows gas to flow from the groove 13 to the cavity 12, and the one-way valve at the exhaust hole 134 only allows gas to flow from the bottom of the movable plate 131 to the top.

[0030] In this embodiment, both ends of the vent 11 are configured to be trumpet-shaped, so that more air can flow through the vent 11 and the narrow tube effect is enhanced.

[0031] The working process and principle of the present invention are as follows:

[0032] When in use, the entire device is placed around the foundation pit for safety protection. When a pedestrian or a vehicle touches the protective plate 5, the presence of the third spring 54 will buffer the contact between the pedestrian and the vehicle, reducing damage to the pedestrian and the vehicle. At the same time, when the protective plate 5 compresses the third spring 54, the air in the telescopic box 51 will be pressed into the shaft cavity 41 through the connecting hole 53, thereby increasing the air pressure in the shaft cavity 41, pushing the lifting block 43 and the insertion rod 44 to slide down and insert into the ground, thereby increasing the anti-dumping ability of the entire device.

[0033] When wind passes through the vent 11, the wind flow rate in the vent 11 will increase due to the narrow tube effect. Due to Bernoulli's principle, the greater the wind speed, the smaller the pressure. The movable plate 131 in the groove 13 slides outward under the pressure. Under the action of the one-way valve, part of the air below the movable plate 131 will come to the top of the movable plate 131 through the suction hole 134. When the wind in the vent 11 stops and the pressure is restored, under the action of the first spring 132, the movable plate 131 slides back and presses part of the previously drawn air into the cavity 12 through the inflation hole 133. Whenever wind passes through the vent 11, the movable plate 131 will slide back and forth to inflate the cavity 12, and the pressure in the cavity 12 and below the piston plate 14 will gradually increase.

[0034] When the wind force is strong, the wind speed in the vent 11 is huge and the pressure is very small. The sliding distance of the movable plate 131 in the groove 13 will increase due to the pressure, and the stopper 135 at the mouth of the groove 13 will be squeezed. The piezoelectric ceramic on the stopper 135 will generate current after being squeezed by the movable plate 131 to charge the conductive spring. After the conductive spring is charged, it will contract and pull the block 181 back into the slide groove 18. After losing the limit of the block 181, the piston plate 14 slides up under the action of pressure and is placed against the limit block 19. The sliding distance of the piston plate 14 is just enough to make the spur rack 17 drive the gear 16 to rotate 90 degrees, and the first bevel gear 22 and the second bevel gear 22 are rotated by 90 degrees. Under the meshing transmission of the bevel gear 23, all the rotating shafts 4 will rotate 90° and will drive the protective plate 5 to rotate together, thereby reducing the wind-exposed area of ​​the entire device, reducing wind resistance, preventing the device from being blown down by strong winds, and improving the stability of the device in severe weather. During the rotation of the protective plate 5, guided by the guide block 56 and the guide groove 55, the protective plate 5 moves closer to the rotating shaft 4 while rotating, pushing the telescopic box 51 closer to the telescopic block 51, and pressing the air in the telescopic box 51 into the shaft cavity 41 through the connecting hole 53, thereby increasing the air pressure in the shaft cavity 41 and pushing the insertion rod 44 to slide down and insert into the ground, further increasing the anti-dumping ability of the entire device.

[0035] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A foundation pit safety protection device for municipal roads, characterized in that: The invention comprises two upright posts (1) and a crossbeam (2), wherein the two ends of the crossbeam (2) are respectively connected to the tops of the two upright posts (1), the bottoms of the two upright posts (1) are commonly connected to a bottom plate (3), a plurality of mutually parallel rotating shafts (4) are rotatably connected between the crossbeam (2) and the bottom plate (3), a protective plate (5) is installed on each of the rotating shafts (4), and an adjusting mechanism is arranged in one of the upright posts (1) for controlling the rotation of the protective plate (5) to play a windproof role.

2. A municipal road foundation pit safety protection device according to claim 1, characterized in that: The regulating mechanism comprises a main shaft (21) and a piston plate (14), wherein one of the columns (1) is provided with a through vent (11), the column (1) is provided with a cavity (12) located above the vent (11), the piston plate (14) is sealingly and slidingly connected to the cavity wall of the cavity (12), the cross beam (2) is a hollow structure, the main shaft (21) is rotatably connected to both ends of the cross beam (2), and a plurality of first bevel gears (22) are coaxially connected to the main shaft (21) at equal distances. ), the upper end of each rotating shaft (4) extends into the cross beam (2) and is coaxially connected to a second bevel gear (23), a plurality of the first bevel gears (22) are respectively meshed with a plurality of second bevel gears (23), one end of the main shaft (21) extends into the cavity (12) and is coaxially connected to a gear (16), a connecting rod (15) is connected to the piston plate (14), a spur rack (17) is connected to the connecting rod (15), and the spur rack (17) is meshed with the gear (16).

3. A municipal road foundation pit safety protection device according to claim 2, characterized in that: A groove (13) is provided on the inner wall of the vent (11), a movable plate (131) is sealingly and slidably connected in the groove (13), a first spring (132) is connected to the movable plate (131), the other end of the first spring (32) is connected to the top groove wall of the groove (13), the top groove wall of the groove (13) is connected to an inflation hole (133) which is in communication with the cavity (12), an air extraction hole (134) is provided on the movable plate (131), and both the air extraction hole (133) and the air extraction hole (134) are provided with a one-way valve, A pair of blocks (135) are arranged at the notch of the groove (13); a slide groove (18) is provided on one side wall of the cavity (12); a block (181) is slidably connected in the slide groove (18); one end of the block (181) located in the slide groove (18) is connected to a conductive spring; a piezoelectric ceramic is arranged on the block (135), and the piezoelectric ceramic is electrically connected to the conductive spring through a wire; the upper end of the connecting rod (15) is connected to a second spring (151), and the upper end of the second spring (151) is connected to the top wall of the cavity (12).

4. A municipal road foundation pit safety protection device according to claim 1, characterized in that: The back of each protective plate (5) is connected to three telescopic boxes (51), and each rotating shaft (4) is connected to three telescopic blocks (52). The telescopic boxes (51) are sealed and slidably connected to the telescopic blocks (52). A plurality of third springs (54) are connected between the protective plate (5) and the rotating shaft (4). An axial cavity (41) is provided in each rotating shaft (4), and a bottom hole (42) is provided at the bottom of the rotating shaft (4) to communicate with the axial cavity (41). A lifting block (43) is sealed and slidably connected to the bottom of the axial cavity (41), and a plug rod (44) is connected to the bottom of the lifting block (43). A connecting hole (53) is provided on each telescopic block (52) to communicate with the axial cavity (41).

5. A municipal road foundation pit safety protection device according to claim 4, characterized in that: A guide groove (55) is provided at the bottom of each protective plate (5); a plurality of guide blocks (56) are connected to the bottom plate (3); each guide block (56) is slidably connected to the guide groove (55) on the corresponding protective plate (5); and a notch (57) is provided on the front side of each protective plate (5) and is connected to the guide groove (55).

6. A municipal road foundation pit safety protection device according to claim 3, characterized in that: The one-way valve at the inflation hole (133) only allows gas to flow from the groove (13) into the cavity (12), and the one-way valve at the exhaust hole (134) only allows gas to flow from the bottom of the movable plate (131) to the top. A limiting block (19) is connected to one side wall of the cavity (12).

7. A municipal road foundation pit safety protection device according to claim 2, characterized in that: Both ends of the vent (11) are arranged in a trumpet-shaped expansion shape.

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