A foundation pit air film with pressure regulating function

Abstract

The present invention belongs to the technical field of foundation pit air film, and specifically relates to a foundation pit air film with a pressure regulating function, including an air film body and a lifting control mechanism; the air film body is arched and installed above the foundation pit, and a plurality of foundation pit support plates are arranged on the pit wall of the foundation pit, and the foundation pit support plates are fixed by anchor rods inserted into the soil; there are multiple lifting control mechanisms, and they are arranged along the contour direction of the foundation pit; each lifting control mechanism is fixed on the foundation pit support plate, and an inflatable cross column is arranged on the lower edge of the air film body, and the inflatable cross column is installed on the lifting control mechanism and lifted and controlled by the lifting control mechanism to achieve the change of the space volume below the air film body, thereby completing the pressure regulation. This scheme controls the height of the air film body through the lifting control mechanism, which can quickly compress the air inside the foundation pit air film, so that the air pressure inside the foundation pit air film rises rapidly, so as to resist sudden strong winds and increase the safety and stability of the use of the foundation pit air film.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit air films, and in particular relates to a foundation pit air film with a pressure regulating function. Background Art

[0002] The foundation pit air film is a structure that can cover the top of the foundation pit. It forms a closed and controlled excavation environment space through inflation or mechanical support 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. It can effectively improve the construction environment of the construction site and reduce the impact of construction on the surrounding environment. As an innovative site protection measure, the foundation pit air film has received widespread attention and application in the field of construction in recent years.

[0003] A certain amount of air often needs to be filled into the foundation pit air film to maintain its shape and stability. Therefore, it is necessary to regulate the pressure of the air inside the foundation pit air film. In the prior art, the amount of air in the foundation pit air film is often controlled by cooperating with the inflation device and the exhaust valve to achieve pressure regulation. However, in actual work, due to the change in wind force in some areas, it is often necessary to quickly increase the pressure of the foundation pit air film when the wind force increases, so as to improve the wind resistance performance of the foundation pit air film. However, the inflation device in the prior art often has limited power, and it is difficult to quickly increase the pressure of the foundation pit air film. For this reason, it is necessary to design a foundation pit air film structure with a pressure regulation function. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a foundation pit air film with a pressure regulating function.

[0005] The technical solution adopted by the present invention is:

[0006] A foundation pit air film with a pressure regulating function, comprising an air film main body and a lifting control mechanism;

[0007] The air film body is arched and installed above the foundation pit. A plurality of foundation pit support plates are arranged on the pit wall of the foundation pit, and the foundation pit support plates are fixed by anchor rods inserted into the soil.

[0008] There are multiple lifting control mechanisms, which are arranged along the contour direction of the foundation pit; each lifting control mechanism is fixed on the foundation pit support plate, and an inflatable cross column is provided on the lower edge of the air film body. The inflatable cross column is installed on the lifting control mechanism and is lifted and lowered by the lifting control mechanism to achieve a change in the amount of space below the air film body, thereby completing the pressure regulation.

[0009] As an alternative or supplement to the above-mentioned foundation pit air film: the air film body includes a lifting compensation section, a slope section and a deformation section; the deformation section is in a convex arc shape, and the left and right sides of the deformation section are respectively connected to a slope section; the inflatable cross column is arranged at the lower edge of the slope section; the lifting compensation section is in a curved surface shape, one side of the lifting compensation section is sealed and connected to the outer side of the lower edge of the slope section, and the other side is connected to the ground outside the foundation pit; a deformation pressure regulating component is arranged on the inner side of the air film body, and the deformation pressure regulating component is used to control the curvature of the deformation section to achieve a change in the amount of space below the air film body, thereby completing the pressure regulation.

[0010] As an alternative or supplement to the above-mentioned foundation pit air film: the deformation pressure regulating assembly includes a pulling rope, a fixed pulley and a deformation winch; the deformation winch is installed on the lifting control mechanism, the fixed pulley is arranged at the edge of the deformation section away from the deformation winch, the lower end of the pulling rope is wrapped around the deformation winch, and the upper end of the pulling rope passes around the fixed pulley and is fixed to the edge of the deformation section close to the deformation winch; when the pulling rope is reeled in or released, the opposite sides of the deformation section are controlled to move closer to or away from each other.

[0011] As an alternative or supplement to the above-mentioned foundation pit air membrane: a plurality of positioning nail assemblies are arranged on the air membrane body, and the positioning nail assemblies include a guide ring head, and the pulling rope passes through the guide ring head and is limited by it.

[0012] As an alternative or supplement to the above-mentioned foundation pit air film: protective nets are respectively arranged on the outer sides of the slope section and the deformation section, and adjacent protective nets are connected to each other.

[0013] As an alternative or supplement to the above-mentioned foundation pit air film: the positioning nail assembly also includes a pressure block, a seat block, a cross-shaped seat and a penetration rod; the end of the cross-shaped seat is fixedly connected with a pressure block and a seat block, and the pressure block and the seat block cooperate to clamp the protective net; the penetration rod is vertically connected to the center of the cross-shaped seat, and passes through the air film body and is threadedly connected to the guide ring head.

[0014] As an alternative or supplement to the above-mentioned foundation pit air membrane: a sealing nail assembly is arranged at each position of the air membrane body corresponding to the positioning nail assembly, and the sealing nail assembly includes an inner sealing sleeve, a threaded plastic nail and a clamping nut; the clamping nut is threadedly connected to the threaded plastic nail, and cooperates with the threaded plastic nut to clamp the air membrane body; the inner sealing sleeve is arranged in the center hole of the threaded plastic nail; the insertion rod has an external thread and is threadedly connected to the internal threaded hole in the center of the inner sealing sleeve.

[0015] As an alternative or supplement to the above-mentioned foundation pit air film: the lifting control mechanism includes a vertical threaded rod, a lifting slide, a lifting frame, a groove seat and an arc-shaped pressure strip; the lifting frame is fixedly installed on the foundation pit support plate, the vertical threaded rod is rotatably arranged on the lifting frame, and the end of the vertical threaded rod is transmission-connected with a lifting motor; the lifting slide is slidingly matched with the lifting frame and is threadedly connected with the vertical threaded rod; the groove seat is fixed on the lifting slide, and the inflatable cross column is installed on the groove seat; the arc-shaped pressure strip is fixedly connected to the groove seat and presses the inflatable cross column.

[0016] As an alternative or supplement to the above-mentioned foundation pit air film: a protective net pulling winch is arranged on the ground outside the foundation pit, and a protective net pull rope is wound on the protective net pulling winch, and the lead-out end of the protective net pull rope is connected to the lower edge of the protective net outside the slope section; when the lifting control mechanism moves up and down, the protective net pulling winch synchronously retracts and releases the protective net pull rope.

[0017] As an alternative or supplement to the above-mentioned foundation pit air film: a plurality of vertical air columns are arranged on the inner side of the slope section, and the lower ends of the vertical air columns are connected to the inflatable horizontal columns.

[0018] The beneficial effects of the present invention are as follows: in this scheme, the height of the air film main body is controlled by the lifting control mechanism, which can quickly compress the air inside the foundation pit air film, so that the air pressure inside the foundation pit air film increases rapidly, so as to resist sudden strong winds and increase the safety and stability of the use of the foundation pit air film; at the same time, compared with the method of inflating through an inflation device, this method not only reduces the height of the foundation pit air film and reduces its force-bearing area, but is also suitable for foundation pit air films of different volumes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0020] Figure 1 This is the cross-sectional structure diagram of the foundation pit air film;

[0021] Figure 2 yes Figure 1 The structural diagram of the local A in the middle;

[0022] Figure 3 yes Figure 1 The structural diagram of the middle part B;

[0023] Figure 4 is a schematic diagram of the structure of the sealing nail assembly;

[0024] Figure 5 It is a structural schematic diagram of a positioning pin assembly;

[0025] Figure 6It is a diagram of the coordination structure of the pulling rope and the fixed pulley.

[0026] In the figure: 1-air film body; 11-lifting compensation section; 12-slope section; 13-deformation section; 14-inflatable cross column; 2-positioning nail assembly; 21-pressure block; 22-seat block; 23-cross seat; 24-penetration rod; 25-guide ring head; 3-deformation pressure regulating assembly; 31-pulling rope; 32-deformation winch; 33-fixed pulley; 4-anchor rod; 5-foundation pit support plate; 6-lifting control mechanism; 61-vertical threaded rod; 62-lifting slide; 63-lifting frame; 64-groove seat; 65-arc pressure strip; 7-sealing nail assembly; 71-inner sealing sleeve; 72-threaded plastic nail; 73-tightening nut; 8-protective net; 9-protective net pulling winch; 91-protective net pull rope. DETAILED DESCRIPTION

[0027] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0028] Example 1

[0029] like Figures 1 to 6 As shown, this embodiment designs a foundation pit air film with a pressure regulating function, including an air film body 1 and a lifting control mechanism 6 and other structures.

[0030] The air film body 1 is arched and installed above the foundation pit. A plurality of foundation pit support plates 5 are arranged on the pit wall of the foundation pit. The foundation pit support plates 5 are fixed by anchor rods 4 inserted into the soil.

[0031] There are multiple lifting control mechanisms 6, which are arranged along the contour direction of the foundation pit; each lifting control mechanism 6 is fixed on the foundation pit support plate 5, and an inflatable horizontal column 14 is arranged on the lower edge of the air film body 1. The inflatable horizontal column 14 is installed on the lifting control mechanism 6 and is lifted and controlled by the lifting control mechanism 6 to achieve the change of the space volume below the air film body 1, thereby completing the pressure regulation. When the height of the air film body 1 is controlled by the lifting control mechanism 6, the air inside the foundation pit air film can be quickly compressed, so that the air pressure inside the foundation pit air film is quickly increased, so as to resist sudden strong winds and increase the safety and stability of the use of the foundation pit air film; on the contrary, the air pressure inside the foundation pit air film can be quickly reduced, thereby improving comfort. In addition, compared with the method of inflating by an inflatable device, this method of lifting the air film body 1 can not only reduce the height of the foundation pit air film, reduce the force area of ​​the foundation pit air film in a strong wind environment, but also is suitable for foundation pit air films of different volumes.

[0032] The air film body 1 includes a lifting compensation section 11, a slope section 12 and a deformation section 13; the deformation section 13 is in a convex arc shape, and the left and right sides of the deformation section 13 are respectively connected to a slope section 12; the inflatable cross column 14 is arranged at the lower edge of the slope section 12. The lifting compensation section 11 is in a curved shape, one side of the lifting compensation section 11 is sealed and connected to the outer side of the lower edge of the slope section 12, and the other side is connected to the ground outside the foundation pit, and the lifting compensation section 11. A deformation pressure regulating component 3 is arranged on the inner side of the air film body 1, and the deformation pressure regulating component 3 is used to control the curvature of the deformation section 13 to achieve the change of the space volume below the air film body 1, thereby completing the pressure regulation.

[0033] The deformation pressure regulating assembly 3 includes a pulling rope 31, a fixed pulley 33 and a deformation hoist 32; the deformation hoist 32 is installed on the lifting control mechanism 6, the fixed pulley 33 is set at the edge of the deformation section 13 away from the deformation hoist 32, the lower end of the pulling rope 31 is wound around the deformation hoist 32, and the upper end of the pulling rope 31 passes around the fixed pulley 33 and is fixed to the edge of the deformation section 13 close to the deformation hoist 32; when the pulling rope is wound or released, the opposite sides of the deformation section 13 are controlled to move closer to or away from each other. When the deformation hoist 32 retracts the pulling rope 31, the left and right sides of the deformation section 13 can be pulled closer to each other, so that the two slope parts are close to each other, thereby compressing the air inside the air film body 1, so that the air pressure inside the foundation pit air film increases rapidly.

[0034] A plurality of positioning pin assemblies 2 are arranged on the air film body 1, and the positioning pin assemblies 2 include a guide ring head 25, through which the pulling rope 31 passes and is limited. When installing the left pulling rope 31, the pulling rope 31 first passes through the guide ring head 25 of the positioning pin assembly 2 at the junction of the left side of the deformation section 13 and the slope section 12, then goes around the fixed pulley 33, and then the end of the pulling rope 31 is fixed at the guide ring head 25. Similarly, the right pulling rope 31 can be installed in reverse.

[0035] The outer sides of the slope section 12 and the deformation section 13 are respectively provided with protection nets 8, and the adjacent protection nets 8 are connected to each other and can rotate around the connection as an axis.

[0036] The positioning pin assembly 2 also includes components such as a pressure block 21, a seat block 22, a cross seat 23 and a penetration rod 24; the end of the cross seat 23 is fixedly connected with the pressure block 21 and the seat block 22, and the pressure block 21 and the seat block 22 cooperate to clamp the protective net 8; the penetration rod 24 is vertically connected to the center of the cross seat 23, and passes through the air film body 1 and is threadedly connected to the guide ring head 25. The protective net 8 is connected to the pulling rope 31 of the deformation pressure regulating assembly 3 through the positioning pin assembly 2, thereby improving the fit between the protective net 8 and the air film body 1, and at the same time, reducing the distance between the pulling rope 31 and the air film body 1.

[0037] A sealing nail assembly 7 is provided at each position of the air film body 1 corresponding to the positioning nail assembly 2, and the sealing nail assembly 7 includes an inner sealing sleeve 71, a threaded plastic nail 72 and a clamping nut 73; the clamping nut 73 is threadedly connected to the threaded plastic nail 72, and cooperates with the threaded plastic nut to clamp the air film body 1; the inner sealing sleeve 71 is arranged in the center hole of the threaded plastic nail 72; the penetration rod 24 has an external thread and is threadedly connected to the internal threaded hole in the center of the inner sealing sleeve 71. The sealing nail assembly 7 reduces the air leakage effect at the positioning nail assembly 2, improves the air leakage prevention performance of the membrane surface of the air film body 1, and also realizes the connection between the air film body 1 and the protective net 8, reducing the mutual friction between the two.

[0038] The lifting control mechanism 6 includes a vertical threaded rod 61, a lifting slide 62, a lifting frame 63, a groove seat 64 and an arc-shaped pressure strip 65; the lifting frame 63 is fixedly installed on the foundation pit support plate 5, and the vertical threaded rod 61 is rotatably set on the lifting frame 63, and the end of the vertical threaded rod 61 is transmission-connected with a lifting motor; the lifting slide 62 is slidably matched with the lifting frame 63, and is threadedly connected with the vertical threaded rod 61; the groove seat 64 is fixed on the lifting slide 62, and the inflatable cross column 14 is installed on the groove seat 64; the arc-shaped pressure strip 65 is fixedly connected to the groove seat 64 and presses the inflatable cross column 14.

[0039] A protection net pulling hoist 9 is arranged on the ground outside the foundation pit, and a protection net pulling rope 91 is wound on the protection net pulling hoist 9, and the lead end of the protection net pulling rope 91 is connected to the lower edge of the protection net 8 outside the slope section 12; when the lifting control mechanism 6 moves up and down, the protection net pulling hoist 9 synchronously retracts and releases the protection net pulling rope 91. The protection net pulling hoist 9 can be loosened or tightened in coordination with the lifting of the foundation pit air film, thereby reducing the constraint of the protection net 8 on the foundation pit air film and improving the fit.

[0040] A plurality of vertical air columns are arranged on the inner side of the slope section 12 , and the lower ends of the vertical air columns are connected to the inflatable horizontal columns 14 . The vertical air columns can provide vertical support for the air film body 1 , thereby improving the stability of the foundation pit air film.

[0041] Each winch and each lifting control mechanism 6 in this solution can be controlled separately by a PLC controller, so that the lifting height and the winding length of the cable of each lifting control mechanism 6 are different, and the specific parameters can be set according to actual conditions.

[0042] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. A foundation pit air film with pressure regulating function, characterized in that: It comprises an air film body (1) and a lifting control mechanism (6); The air film body (1) is arched and installed above the foundation pit. A plurality of foundation pit support plates (5) are arranged on the pit wall of the foundation pit. The foundation pit support plates (5) are fixed by anchor rods (4) inserted into the soil. There are multiple lifting control mechanisms (6) arranged along the contour direction of the foundation pit; each lifting control mechanism (6) is fixed on the foundation pit support plate (5), and an inflatable cross column (14) is arranged at the lower edge of the air film body (1). The inflatable cross column (14) is installed on the lifting control mechanism (6) and is lifted and lowered by the lifting control mechanism (6) to achieve a change in the amount of space below the air film body (1), thereby completing pressure regulation.

2. The foundation pit air film with pressure regulating function according to claim 1 is characterized in that: The air film body (1) comprises a lifting compensation section (11), a slope section (12) and a deformation section (13); the deformation section (13) is in a convex arc shape, and the left and right sides of the deformation section (13) are respectively connected to a slope section (12); the inflatable cross column (14) is arranged at the lower edge of the slope section (12); the lifting compensation section (11) is in a curved surface shape, and one side of the lifting compensation section (11) is sealed and connected to the outer side of the lower edge of the slope section (12), and the other side is connected to the ground outside the foundation pit; a deformation pressure regulating component (3) is arranged on the inner side of the air film body (1), and the deformation pressure regulating component (3) is used to control the curvature of the deformation section (13) to achieve a change in the amount of space below the air film body (1), thereby completing the pressure regulation.

3. The foundation pit air film with pressure regulating function according to claim 2 is characterized in that: The deformation pressure regulating assembly (3) comprises a pulling rope (31), a fixed pulley (33) and a deformation hoist (32); the deformation hoist (32) is mounted on the lifting control mechanism (6); the fixed pulley (33) is arranged at the edge of the deformation section (13) away from the deformation hoist (32); the lower end of the pulling rope (31) is wound around the deformation hoist (32); the upper end of the pulling rope (31) passes around the fixed pulley (33) and is fixed to the edge of the deformation section (13) close to the deformation hoist (32); when the pulling rope is wound up or released, the opposite sides of the deformation section (13) are controlled to move closer to or farther away from each other.

4. The foundation pit air film with pressure regulating function according to claim 3 is characterized in that: A plurality of positioning nail assemblies (2) are arranged on the air membrane body (1), wherein the positioning nail assemblies (2) include a guide ring head (25), and a pulling rope (31) passes through the guide ring head (25) and is limited by the guide ring head (25).

5. The foundation pit air film with pressure regulating function according to claim 4 is characterized in that: Protection nets (8) are respectively arranged on the outer sides of the slope section (12) and the deformation section (13), and adjacent protection nets (8) are connected to each other.

6. The foundation pit air film with pressure regulating function according to claim 5 is characterized in that: The positioning pin assembly (2) also includes a pressure block (21), a seat block (22), a cross-shaped seat (23) and a penetration rod (24); the end of the cross-shaped seat (23) is fixedly connected to the pressure block (21) and the seat block (22), and the pressure block (21) and the seat block (22) cooperate to clamp the protective net (8); the penetration rod (24) is vertically connected to the center of the cross-shaped seat (23), and passes through the air film body (1) and is threadedly connected to the guide ring head (25).

7. The foundation pit air film with pressure regulating function according to claim 6 is characterized in that: A sealing nail assembly (7) is provided at each position of the air film body (1) corresponding to the positioning nail assembly (2), and the sealing nail assembly (7) includes an inner sealing sleeve (71), a threaded plastic nail (72) and a clamping nut (73); the clamping nut (73) is threadedly connected to the threaded plastic nail (72) and cooperates with the threaded plastic nut to clamp the air film body (1); the inner sealing sleeve (71) is arranged in the center hole of the threaded plastic nail (72); the insertion rod (24) has an external thread and is threadedly connected to the internal threaded hole in the center of the inner sealing sleeve (71).

8. The foundation pit air film with pressure regulating function according to any one of claims 2 to 7, characterized in that: The lifting control mechanism (6) comprises a vertical threaded rod (61), a lifting slide (62), a lifting frame (63), a slot seat (64) and an arc-shaped pressure strip (65); the lifting frame (63) is fixedly mounted on the foundation pit support plate (5), the vertical threaded rod (61) is rotatably arranged on the lifting frame (63), and the end of the vertical threaded rod (61) is drivingly connected to a lifting motor; the lifting slide (62) is slidably matched with the lifting frame (63) and is threadedly connected with the vertical threaded rod (61); the slot seat (64) is fixed on the lifting slide (62), and the inflatable cross column (14) is mounted on the slot seat (64); the arc-shaped pressure strip (65) is fixedly connected to the slot seat (64) and presses the inflatable cross column (14).

9. The foundation pit air film with pressure regulating function according to claim 7, characterized in that: A protective net pulling hoist (9) is arranged on the ground outside the foundation pit, a protective net pulling rope (91) is wound around the protective net pulling hoist (9), and the lead-out end of the protective net pulling rope (91) is connected to the lower edge of the protective net (8) outside the slope section (12); when the lifting control mechanism (6) moves up and down, the protective net pulling hoist (9) synchronously retracts and releases the protective net pulling rope (91).

10. The foundation pit air film with pressure regulating function according to any one of claims 2 to 7, characterized in that: A plurality of vertical air columns are arranged on the inner side of the slope section (12), and the lower ends of the vertical air columns are connected to the inflatable horizontal column (14).

Images