Foundation pit gas film for green construction

Abstract

A foundation pit gas film for green construction relates to the technical field of foundation pit gas films, and comprises a gas film body, a gas pipe and a gas pipe, the anchoring units are arranged between the tops of the two opposite side walls of the foundation pit and the gas film body in a one-to-one correspondence mode, each anchoring unit comprises a plurality of anchoring devices arranged at intervals in the axial direction of the gas film body, and the anchoring devices of the two anchoring units are oppositely arranged in a one-to-one correspondence mode; every two anchoring devices which are oppositely arranged are connected through an inhaul cable, and the inhaul cables are arranged along the surface of the gas film body in a tensioning mode; each anchoring device comprises a fixing mechanism fixedly connected with the gas film body and an adjusting mechanism connected with one end of the inhaul cable, the fixing mechanisms are used for fixing the gas film body and the top of the side wall of the foundation pit, and the adjusting mechanisms are used for adjusting the angle between the inhaul cable and the horizontal direction and the tensioning degree.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit air film, and particularly relates to a foundation pit air film for green construction. Background Art

[0002] A foundation pit air film is a structure that can cover the foundation pit. By inflating or mechanical support, a closed and controlled excavation environment space is formed to provide protection for the foundation pit. This structure has multiple functions such as dust prevention, noise reduction, heat preservation, heat insulation, wind resistance, and impact resistance, and can effectively improve the construction environment of the construction site and reduce the impact of construction on the surrounding environment. As a new technology for green construction, the foundation pit air film has received extensive attention and application in the field of construction in recent years.

[0003] When the existing foundation pit air film is installed, the edge of the air film is fixed through anchoring devices (such as anchor bolts, steel cables, etc.), and then devices such as air pressure sensors, fresh air systems, and fire sprinklers are installed synchronously and connected to the Internet of Things control platform to ensure real-time monitoring and regulation functions. Finally, air is filled to complete the installation of the foundation pit air film.

[0004] However, most of the existing anchoring devices are rigidly connected to the foundation pit and cannot be dynamically adjusted according to the internal and external force conditions of the air film. When the internal pressure of the air film changes too much or is affected by external weather factors, the efficiency of adjusting the internal air pressure of the air film only through the air charging and discharging equipment is low, resulting in insufficient stability of the air film. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a foundation pit air film for green construction to solve the problem that the anchoring device of the foundation pit air film in the prior art cannot be dynamically adjusted.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A foundation pit air film for green construction, comprising:

[0008] An air film body, which is arched and spans over the foundation pit; and

[0009] An anchoring unit, which has two groups and is correspondingly arranged between the tops of the two opposite side walls of the foundation pit and the air film body. Each group of anchoring units includes a plurality of anchoring devices arranged at intervals along the axial direction of the air film body. The plurality of anchoring devices of the two groups of anchoring units are arranged correspondingly and oppositely. A cable is connected between each two oppositely arranged anchoring devices, and the cable is tensioned along the surface of the air film body;

[0010] Each of the anchoring devices includes a fixing mechanism fixedly connected to the air film body and an adjusting mechanism connected to one end of the cable. The fixing mechanism is used to fix the air film body to the top of the foundation pit side wall, and the adjusting mechanism is used to adjust the angle between the cable and the horizontal direction and the tension degree.

[0011] Compared with the prior art, the present invention has the following beneficial effects: During use, first fix the air film body through the fixing mechanism of each anchoring device. Then, when the air pressure inside the air film body decreases, reduce the angle between the cable and the horizontal direction and tighten the cable through the adjusting mechanism to tie the air film body tightly; when the air pressure inside the air film body increases, increase the angle between the cable and the horizontal direction and loosen the cable through the adjusting mechanism to avoid over-tightening the air film body and causing local deformation of the air film body; the operation is simple and convenient, and the cable can be adjusted by the adjusting structure to quickly adapt to the pressure inside the air film body, enabling the air film body to adapt to different environmental pressures and having good stability.

[0012] Preferably, each of the adjusting mechanisms includes a bottom plate fixedly installed on the upper part of the foundation pit side wall, a driving part fixedly installed on the bottom plate, a telescopic part rotatably arranged on the bottom plate, and a transmission part arranged between the driving part and the telescopic part. The telescopic part includes a connecting end and a telescopic end slidably arranged between the inner and outer sides of the connecting end. The transmission part is connected to both the connecting end and the telescopic end of the telescopic part, so that when the transmission part drives the connecting end to rotate, the telescopic end synchronously slides telescopically. The cable is connected to the telescopic end.

[0013] Preferably, the connecting end includes a fixed cylinder, and the telescopic end includes a telescopic tube coaxially slidably arranged between the inner and outer sides of the fixed cylinder. The bottom of the fixed cylinder is fixedly connected to the power output end of the transmission part. The power output end of the transmission part freely penetrates into the fixed cylinder and is movably connected to the inner wall of the telescopic tube. The telescopic tube is connected to the cable through a connecting piece.

[0014] Preferably, a bracket is vertically and fixedly installed on the upper part of the bottom plate. On the side of the bracket facing the air film body, two connecting plates are fixedly installed in opposite directions along the horizontal direction. The transmission part includes a gear transmission part arranged between the two connecting plates and an inverted U-shaped frame straddling outside the two connecting plates. One side wall of the inverted U-shaped frame is connected to the power output end of the driving part, and the other side wall is rotatably connected to the adjacent connecting plate. The fixed cylinder is fixedly connected to the upper part of the horizontal section of the inverted U-shaped frame. The power output end of the gear transmission part freely penetrates into the fixed cylinder and is movably connected to the inner wall of the telescopic tube.

[0015] Preferably, two limiting strips are fixedly installed on the inner wall of the fixed cylinder facing each other along its axis. Two strip-shaped grooves are axially formed on the outer wall of the telescopic tube facing each other, and a double spiral groove is axially formed on the inner wall of the telescopic tube. The two limiting strips are respectively and slidably clamped with the two strip-shaped grooves, and the power output end of the gear transmission member is slidably connected with the double spiral groove.

[0016] Preferably, the gear transmission member includes an end face gear fixedly installed between two connecting plates through a connecting shaft and a bevel gear rotatably installed at the bottom of the horizontal section of the U-shaped frame through a rotating rod. One end of the connecting shaft away from the driving part freely passes through the connecting plate and is rotatably connected with the corresponding side wall of the U-shaped frame. The bevel gear meshes with the end face gear. The rotating rod freely penetrates through the U-shaped frame and the fixed cylinder and then extends into the telescopic tube. Two limiting rods are fixedly installed at one end of the rotating rod in the telescopic tube perpendicular to its axis facing each other. The free ends of the two limiting rods are respectively and slidably connected with the double spiral groove.

[0017] Preferably, the driving part includes a motor fixedly installed on the upper part of the bottom plate through a base, and the power output shaft of the motor is fixedly connected with the corresponding side wall of the U-shaped frame.

[0018] Preferably, the connecting member includes a connecting head fixedly connected with one end of the telescopic tube outside the fixed cylinder and a connecting ring connected between the connecting head and the cable.

[0019] Preferably, the fixing mechanism includes a cushion plate placed on the top of the corresponding side wall of the foundation pit and a pre-embedded part fixedly installed between the inside and outside of the top of the corresponding side wall of the foundation pit. The air film body is clamped and fixed between the cushion plate and the pre-embedded part.

[0020] Preferably, the pre-embedded part includes a film pressing angle steel and an anchor rod. The film pressing angle steel is placed on the upper part of the cushion plate. The air film body is located between the film pressing angle steel and the cushion plate. The anchor rod fixedly penetrates through the film pressing angle steel, the air film body, the cushion plate and the top of the corresponding side wall of the foundation pit.

[0021] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the air film in the foundation pit in an embodiment of the present invention.

[0023] Figure 2 is Figure 1 a partial enlarged view of I in

[0024] Figure 3 is Figure 1 a top view of the cooperation between the driving part and the transmission part in

[0025] Figure 4 is Figure 2 A sectional view of the telescopic part in [device name] and a schematic diagram of the shape of the double - helix groove therein.

[0026] Figure 5 is Figure 2 A schematic structural view of the telescopic part in [device name].

[0027] The reference numerals in the figure are in sequence: 1, foundation pit; 2, air film body; 3, backing plate; 31, pressure - film angle steel; 32, anchor rod; 4, cable; 41, connecting ring; 42, connector; 5, bottom plate; 51, bracket; 52, connecting plate; 53, face gear; 54, connecting shaft; 6, U - shaped frame; 61, bevel gear; 62, rotating rod; 63, limiting rod; 7, fixed cylinder; 71, telescopic tube; 72, limiting strip; 73, strip - shaped groove; 74, double - helix groove; 8, motor; 81, base. Detailed implementation manners

[0028] In order to make the technical means, creative features, achieved purposes and functions of the present invention clearer and easier to understand, the present invention will be further described below in conjunction with the drawings and specific implementation manners:

[0029] As Figure 1-2 shown, an embodiment of the present utility model provides a foundation - pit air film for green construction, including: an air film body 2, which is arched and spans over the upper part of the foundation pit 1; and an anchoring unit, which has two groups and is arranged in one - to - one correspondence between the tops of the two opposite side walls of the foundation pit 1 and the air film body 2. Each group of the anchoring units includes a plurality of anchoring devices arranged at intervals along the axial direction of the air film body 2. The plurality of anchoring devices of the two groups of the anchoring units are arranged opposite to each other in one - to - one correspondence. A cable 4 is connected between each two oppositely arranged anchoring devices, and the cable 4 is tensioned along the surface of the air film body 2; each of the anchoring devices includes a fixing mechanism fixedly connected to the air film body 2 and an adjusting mechanism connected to one end of the cable 4. The fixing mechanism is used to fix the air film body 2 to the top of the side wall of the foundation pit 1, and the adjusting mechanism is used to adjust the angle between the cable 4 and the horizontal direction and the tension degree.

[0030] First, the air film body 2 is fixed through the fixing mechanism of each anchoring device. Then, when the air pressure in the air film body 2 decreases, the angle between the cable 4 and the horizontal direction is reduced and the cable 4 is tightened through the adjusting mechanism to tie up the air film body 2; when the air pressure in the air film body 2 increases, the angle between the cable 4 and the horizontal direction is increased and the cable 4 is loosened through the adjusting mechanism to avoid over - tying the air film body 2 and causing local deformation of the air film body 2; the operation is simple and convenient, and the cable 4 can be adjusted through the adjusting structure to quickly adapt to the pressure in the air film body 2, so that the air film body 2 can adapt to different environmental pressures and has good stability.

[0031] As Figure 3-5 shown, according to another embodiment of the present utility model, for the air film in the foundation pit for green construction, the included adjusting mechanism is further optimized. Each adjusting mechanism includes a bottom plate 5 fixedly installed on the upper part of the side wall of the foundation pit 1, a driving part fixedly installed on the bottom plate 5, a telescopic part rotatably arranged on the bottom plate 5, and a transmission part arranged between the driving part and the telescopic part. The telescopic part includes a connecting end and a telescopic end slidably arranged between the inner and outer sides of the connecting end. The transmission part is connected to both the connecting end and the telescopic end of the telescopic part, so that while the transmission part drives the connecting end to rotate, the telescopic end synchronously expands and contracts and slides. The cable 4 is connected to the telescopic end; when the connecting end rotates, the angle between the cable 4 and the horizontal direction can be changed, and when the telescopic end expands and contracts and slides, the tension degree of the cable 4 can be changed.

[0032] The connecting end includes a fixed cylinder 7, and the telescopic end includes a telescopic tube 71 coaxially slidably arranged between the inner and outer sides of the fixed cylinder 7. The bottom of the fixed cylinder 7 is fixedly connected to the power output end of the transmission part. The power output end of the transmission part freely penetrates into the fixed cylinder 7 and is movably connected to the inner wall of the telescopic tube 71. The telescopic tube 71 is connected to the cable 4 through a connecting piece; preferably, the connecting piece includes a connecting head 42 fixedly connected to one end of the telescopic tube 71 outside the fixed cylinder 7 and a connecting ring 41 connected between the connecting head 42 and the cable 4; during the movement of the telescopic tube 71, the cable 4 is tightened or loosened through the connecting head 42 and the connecting ring 41.

[0033] A support 51 is vertically and fixedly installed on the upper part of the bottom plate 5. On the side of the support 51 facing the air film body 2, two connecting plates 52 are fixedly installed in opposite directions along the horizontal direction. The transmission part includes a gear transmission part arranged between the two connecting plates 52 and a U-shaped frame 6 straddling outside the two connecting plates 52. One side wall of the U-shaped frame 6 is connected to the power output end of the driving part, and the other side wall is rotatably connected to the adjacent connecting plate 52. The fixed cylinder 7 is fixedly connected to the upper part of the horizontal section of the U-shaped frame 6. The power output end of the gear transmission part freely penetrates into the fixed cylinder 7 and is movably connected to the inner wall of the telescopic tube 71; the driving part drives the U-shaped frame 6 to rotate, so as to drive the fixed cylinder 7 and the telescopic tube 71 to rotate, thereby achieving the purpose of changing the angle between the cable 4 and the horizontal direction.

[0034] On the inner wall of the fixed cylinder 7, two limiting strips 72 are fixedly installed facing each other along its axial direction. On the outer wall of the telescopic tube 71, two strip-shaped grooves 73 are opened facing each other along its axial direction. A double spiral groove 74 is opened on the inner wall of the telescopic tube 71 along its axial direction. The two limiting strips 72 are slidably clamped with the two strip-shaped grooves 73 in a one-to-one correspondence. The power output end of the gear transmission member is slidably connected with the double spiral groove 74. The gear transmission member includes an end face gear 53 fixedly installed between two connecting plates 52 through a connecting shaft 54 and a bevel gear 61 rotatably installed at the bottom of the horizontal section of the U-shaped frame 6 through a rotating rod 62. One end of the connecting shaft 54 far from the driving part freely passes through the connecting plate 52 and is rotatably connected with the corresponding side wall of the U-shaped frame 6. The bevel gear 61 meshes with the end face gear 53. The rotating rod 62 freely passes through the U-shaped frame 6 and the fixed cylinder 7 and extends into the telescopic tube 71. At one end of the rotating rod 62 located in the telescopic tube 71, two limiting rods 63 are fixedly installed facing each other perpendicular to its axial direction. The free ends of the two limiting rods 63 are slidably connected with the double spiral groove 74 in a one-to-one correspondence.

[0035] Since the end face gear 53 always remains stationary, when the driving part drives the U-shaped frame 6 to rotate, it drives the bevel gear 61 to mesh with the end face gear 53 and rotate, thereby driving the rotating rod 62 to rotate, so that the two limiting rods 63 slide along the double spiral groove 74. Also, due to the limiting effect of the two limiting strips 72 and the two strip-shaped grooves 73, the telescopic tube 71 will not rotate synchronously but only move along the axial direction of the fixed cylinder 7, thus achieving the purpose of the telescopic movement of the telescopic tube 71 between the inner and outer sides of the fixed cylinder 7.

[0036] The driving part includes a motor 8 fixedly installed on the upper part of the bottom plate 5 through a base 81. The power output shaft of the motor 8 is fixedly connected with the corresponding side wall of the U-shaped frame 6. Among them, the motor 8 is a motor 8 that can rotate forward and backward, and there is an automatic brake device in the motor 8 to ensure that the motor 8 is locked in the shutdown state. The specific structure and working principle of the automatic brake device are prior arts and will not be described in detail here.

[0037] As Figure 1-2 shown, according to another embodiment of the present invention, for the air film for foundation pit in green construction, the fixing mechanism included therein is further optimized. The fixing mechanism includes a backing plate 3 placed on the top of the corresponding side wall of the foundation pit 1 and a pre-embedded part fixedly installed between the inner and outer sides of the top of the corresponding side wall of the foundation pit 1. The air film body 2 is clamped and fixed between the backing plate 3 and the pre-embedded part. The pre-embedded part includes a film pressing angle steel 31 and an anchor rod 32. The film pressing angle steel 31 is placed on the upper part of the backing plate 3. Preferably, the vertical section of the film pressing angle steel 31 is arranged close to the air film body 2. The air film body 2 is located between the film pressing angle steel 31 and the backing plate 3. The anchor rod 32 fixedly penetrates the film pressing angle steel 31, the air film body 2, the backing plate 3 and the top of the corresponding side wall of the foundation pit 1.

[0038] The working principle of the present invention is as follows: When the present utility model is in use, the air film body 2 is tightly pressed between the horizontal section of each film-pressing angle steel 31 and the backing plate 3, and the film-pressing angle steel 31, the air film body 2, the backing plate 3 and the corresponding side wall top of the foundation pit 1 are fixed through the anchor rod 32. When the air pressure in the air film body 2 decreases, the motor 8 is started to drive the U-shaped frame 6 to rotate towards the air film body 2, so as to reduce the angle between the cable 4 and the horizontal direction. While the U-shaped frame 6 is rotating, the bevel gear 61 meshes with the face gear 53 and rotates, so as to drive the rotating rod 62 to rotate, causing the two limiting rods 63 to slide in the double spiral groove 74, and under the limiting action of the two limiting strips 72 and the two strip-shaped grooves 73, driving the telescopic tube 71 to move into the fixed cylinder 7, so that the cable 4 is tightened to ensure the binding of the air film body 2; When the air pressure in the air film body 2 increases, the motor 8 is started to rotate in the reverse direction, driving the U-shaped frame 6 to rotate away from the air film body 2, so as to increase the angle between the cable 4 and the horizontal direction, and at the same time causing the bevel gear 61 to mesh with the face gear 53 and rotate in the reverse direction, so as to drive the two limiting rods 63 to slide reversely in the double spiral groove 74 through the rotating rod 62, making the telescopic rod move out of the fixed cylinder 7, thereby loosening the cable 4 to avoid over-binding the air film body 2 and causing local deformation of the air film body 2.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A foundation pit air film for green construction, characterized in that Including: An air film body (2), which is arched and spans over the upper part of the foundation pit (1); And An anchoring unit, which has two groups and is arranged in a one-to-one correspondence between the tops of the two opposite side walls of the foundation pit (1) and the air film body (2). Each group of the anchoring unit includes a number of anchoring devices arranged at intervals along the axial direction of the air film body (2). The anchoring devices of the two groups of the anchoring unit are arranged in a one-to-one correspondence and opposite to each other. A cable (4) is connected between each two oppositely arranged anchoring devices, and the cable (4) is tensioned along the surface of the air film body (2); Each of the anchoring devices includes a fixing mechanism fixedly connected to the air film body (2) and an adjusting mechanism connected to one end of the cable (4). The fixing mechanism is used to fix the air film body (2) to the top of the side wall of the foundation pit (1), and the adjusting mechanism is used to adjust the angle and the tension degree between the cable (4) and the horizontal direction.

2. The air film for foundation pit in green construction according to claim 1, wherein Each of the adjusting mechanisms includes a bottom plate (5) fixedly installed on the upper part of the side wall of the foundation pit (1), a driving part fixedly installed on the bottom plate (5), a telescopic part rotatably arranged on the bottom plate (5), and a transmission part arranged between the driving part and the telescopic part. The telescopic part includes a connecting end and a telescopic end slidably arranged between the inner and outer sides of the connecting end. The transmission part is connected to both the connecting end and the telescopic end of the telescopic part, so that when the transmission part drives the connecting end to rotate, the telescopic end synchronously expands and contracts and slides, and the cable (4) is connected to the telescopic end.

3. A foundation pit air film for green construction according to claim 2, characterized in that, The connecting end includes a fixed cylinder (7), and the telescopic end includes a telescopic tube (71) coaxially slidably arranged between the inner and outer sides of the fixed cylinder (7). The bottom of the fixed cylinder (7) is fixedly connected to the power output end of the transmission part. The power output end of the transmission part freely penetrates into the fixed cylinder (7) and is movably connected to the inner wall of the telescopic tube (71). The telescopic tube (71) is connected to the cable (4) through a connecting piece.

4. A foundation pit air film for green construction according to claim 3, characterized in that, A bracket (51) is vertically fixedly installed on the upper part of the bottom plate (5). Two connecting plates (52) are fixedly installed on the side of the bracket (51) facing the air film body (2) in the horizontal direction and facing each other. The transmission part includes a gear transmission part arranged between the two connecting plates (52) and an inverted U-shaped frame (6) spanning outside the two connecting plates (52). One side wall of the inverted U-shaped frame (6) is connected to the power output end of the driving part, and the other side wall is rotatably connected to the adjacent connecting plate (52). The fixed cylinder (7) is fixedly connected to the upper part of the horizontal section of the inverted U-shaped frame (6). The power output end of the gear transmission part freely penetrates into the fixed cylinder (7) and is movably connected to the inner wall of the telescopic tube (71).

5. The air film for foundation pit in green construction according to claim 4, characterized in that, Two limiting strips (72) are fixedly installed on the inner wall of the fixed cylinder (7) in the axial direction facing each other. Two strip-shaped grooves (73) are axially opened on the outer wall of the telescopic tube (71) in the axial direction facing each other. A double helical groove (74) is axially opened on the inner wall of the telescopic tube (71). The two limiting strips (72) are slidably clamped with the two strip-shaped grooves (73) in a one-to-one correspondence. The power output end of the gear transmission part is slidably connected to the double helical groove (74).

6. The air film for foundation pit in green construction according to claim 5, characterized in that, The gear transmission member includes an end face gear (53) fixedly installed between two connecting plates (52) through a connecting shaft (54), and a bevel gear (61) rotatably installed at the bottom of the horizontal section of the U-shaped frame (6) through a rotating rod (62). One end of the connecting shaft (54) away from the driving part freely passes through the connecting plate (52) and is rotatably connected to the corresponding side wall of the U-shaped frame (6). The bevel gear (61) meshes with the end face gear (53). The rotating rod (62) freely penetrates through the U-shaped frame (6) and the fixed cylinder (7) and then extends into the telescopic tube (71). At one end of the rotating rod (62) located inside the telescopic tube (71), two limiting rods (63) are fixedly installed perpendicular to its axial direction and facing each other. The free ends of the two limiting rods (63) are respectively slidably connected to the double spiral grooves (74).

7. A foundation pit air film for green construction according to claim 4, characterized in that, The driving part includes a motor (8) fixedly installed on the upper part of the bottom plate (5) through a base (81). The power output shaft of the motor (8) is fixedly connected to the corresponding side wall of the U-shaped frame (6).

8. A foundation pit air film for green construction according to claim 3, characterized in that The connecting member includes a connecting head (42) fixedly connected to the end of the telescopic tube (71) outside the fixed cylinder (7), and a connecting ring (41) connected between the connecting head (42) and the cable (4).

9. A foundation pit air film for green construction according to claim 1, characterized in that, The fixing mechanism includes a backing plate (3) placed at the top of the corresponding side wall of the foundation pit (1), and a pre-embedded part fixedly installed between the inside and outside of the top of the corresponding side wall of the foundation pit (1). The air film body (2) is clamped and fixed between the backing plate (3) and the pre-embedded part.

10. A foundation pit air film for green construction according to claim 9, characterized in that, The pre-embedded part includes a film pressing angle steel (31) and an anchor rod (32). The film pressing angle steel (31) is placed on the upper part of the backing plate (3). The air film body (2) is located between the film pressing angle steel (31) and the backing plate (3). The anchor rod (32) fixedly penetrates through the film pressing angle steel (31), the air film body (2), the backing plate (3) and the top of the corresponding side wall of the foundation pit (1).

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