A bidirectional water retaining air shield dam

Abstract

The utility model relates to a bidirectional water-retaining air shield dam body, which comprises: an arc-shaped shield plate for upstream water retaining, a folding shield plate for downstream water retaining, a connecting shaft between the arc-shaped shield plate and the folding shield plate, a rubber airbag, a main anchoring system, a hinged cover plate, an air filling and exhausting pipeline and a bottom shaft support. The utility model solves the operation problem of the air shield dam caused by the buoyancy of downstream water and the safe operation problem of the air shield dam with upstream and downstream water level deficit. The utility model has a scientific design, a reasonable and simple structure, an aesthetic appearance, is easy to install and operate, has good real-time performance, a low failure rate, is simple in production process and installation, and has good water retaining, water control and flood prevention effects.

Description

Technical Field

[0001] The utility model relates to a bidirectional water retaining gas shield dam body, belonging to the technical field of water conservancy and hydropower facilities. The bidirectional water retaining gas shield dam body is a unit structure dam body of a bidirectional water retaining gas shield dam for water retaining, water control and flood prevention facilities, which is set at the confluence of two rivers, the confluence of rivers and lakes, and the estuary of a river. Background Art

[0002] Dams are important facilities in modern water conservancy, especially the active dam-type air shield dams, which have been favored by industry insiders. The bidirectional water-retaining air shield dam is widely used in waterways where there is water upstream and downstream of the dam at the confluence of two rivers, the confluence of rivers and lakes, and the mouth of a river into the sea. The bidirectional water-retaining air shield dam can realize the intelligent adjustment of the air supply of the pneumatic system through the control system, and drive the bidirectional water-retaining air shield dam to rise and fall for water retaining, water control and flood prevention.

[0003] However, because there is water both upstream and downstream of the dam, the buoyancy of the downstream water causes the existing air shield dam to operate unstable or lose its function. Utility Model Content

[0004] In view of this, the utility model proposes a bidirectional water-retaining air shield dam body, which solves the problem of unstable operation or loss of function of the air shield dam caused by the buoyancy of downstream water. It has scientific design, reasonable and simple structure, beautiful appearance, easy installation and operation, good real-time performance, low failure rate, simple production process and installation, and good water retaining, water control and flood prevention effects.

[0005] The bidirectional water retaining air shield dam body described in the utility model is a unit structure of a bidirectional water retaining air shield dam for water retaining, water control and flood prevention facilities arranged on a waterway with water both upstream and downstream of the dam body, and a plurality of unit structures constitute an integral air shield dam.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] The bidirectional water-retaining air shield dam body comprises: an arcuate shield plate 1 for upstream water retaining, a folding shield plate 2 for downstream water retaining, a connecting shaft 3 between the arcuate shield plate 1 and the folding shield plate 2, a rubber airbag 4, a main anchoring system 5, a hinged cover plate 6, an air filling and exhaust pipeline 7 and a bottom shaft support 8.

[0008] The arc-shaped shield plate 1 comprises a top self-lubricating ring 11, a top shaft hole 12, an arc-shaped rib plate 13, a wave-breaking plate 14, an arc-shaped shield plate bolt 15 for fixing a stop seal and connecting a hinge cover plate, and an arc-shaped shield plate reinforcing plate 16.

[0009] The folding shield 2 includes an upper shaft hole 21, a connecting middle shaft 22, a middle shaft self-lubricating ring 23, a middle shaft hole 24, a bottom shaft 25, a bottom self-lubricating ring 26, a bottom shaft hole 27, a folding shield rib 28, a folding shield bolt 29 for fixing the spacer seal, and a folding shield reinforcement plate 30.

[0010] The connecting shaft 3 comprises a connecting shaft flexible dustproof sheet 31 , a dustproof sheet pressing plate 32 , and a dustproof sheet fixing bolt 33 .

[0011] The rubber airbag 4 includes an air nozzle 41 and a rubber hose assembly 42 .

[0012] The main anchoring system 5 includes anchor bolts 51 , a lower pressure plate 52 , and an upper pressure plate 53 .

[0013] A support hole 81 is provided at the upper end of the bottom shaft support 8 .

[0014] The bidirectional water retaining air shield dam body is composed of units equally divided according to integers of the total length of the overall bidirectional water retaining air shield dam.

[0015] The top axial hole 12, the upper axial hole 21, the middle axial hole 24 and the bottom axial hole 27 penetrate the bidirectional water-retaining air shield dam body.

[0016] The top axial hole 12 and the upper axial hole 21 are of equal width and alternately penetrate the bidirectional water retaining air shield dam body.

[0017] The top self-lubricating ring 11, the middle shaft self-lubricating ring 23 and the bottom self-lubricating ring 26 are made of high molecular self-lubricating materials, and are made of polytetrafluoroethylene, polyoxymethylene or ultra-high molecular weight polyethylene.

[0018] The flexible dustproof sheet 31 is made of EPDM rubber or PVC tape.

[0019] The outer diameters of the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 match the top shaft hole 12, the upper shaft hole 21, the middle shaft hole 24, and the bottom shaft hole 27; the inner diameters match the connecting shaft 3, the connecting middle shaft 22, and the bottom shaft 25; the width is 400mm to 600mm; the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 of the bidirectional water retaining air shield dam body are each provided with 3; they are respectively arranged at the two ends and the middle of the bidirectional water retaining air shield dam body.

[0020] The connecting shaft 3, the connecting middle shaft 22 and the bottom shaft 25 penetrate the bidirectional water-retaining air shield dam body.

[0021] The upper pressing plate 53 is divided into two types, a wedge-shaped upper pressing plate and a flat pressing plate; when the water retaining height is greater than 2.5 m, a wedge-shaped upper pressing plate is used; when the water retaining height is less than 2.5 m, a flat pressing plate is used.

[0022] The advantages and effects of the utility model are:

[0023] 1) The utility model provides a bidirectional water retaining air shield dam body to solve the problem of unstable operation or loss of function of the air shield dam caused by the buoyancy of downstream water.

[0024] 2) The utility model has a scientific design and a reasonable and simple structure.

[0025] 3) The product of the utility model is beautiful, easy to install and operate, has low engineering cost, good real-time performance, low failure rate, and good water blocking, water control and flood prevention effects.

[0026] 3) The production process of the product of the utility model is simple, the production efficiency is high, the raw materials are easily available, and the cost is low.

[0027] 4) The maintenance and transportation of the product of the utility model are simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the bidirectional water retaining air shield dam body of the utility model.

[0029] Figure 2 It is a schematic diagram of the collapse of the bidirectional water-retaining air shield dam body of the utility model.

[0030] Figure 3 It is a schematic diagram of the arc-shaped shield plate of the utility model.

[0031] Figure 4 It is a schematic diagram of the folding shield of the utility model.

[0032] Figure numerals: 1-arc shield, 2-folding shield, 3-connecting shaft, 4-rubber airbag, 5-main anchoring system, 6-hinge cover, 7-inflating and exhausting pipeline, 8-bottom shaft support; 11-top self-lubricating ring, 12-top shaft hole, 13-arc rib plate, 14-wave-breaking plate, 15-arc shield bolt, 16-arc shield reinforcement plate; 21-upper shaft hole, 22-connecting middle shaft, 23-middle shaft self-lubricating Sliding ring, 24-middle shaft hole, 25-bottom shaft, 26-bottom self-lubricating ring, 27-bottom shaft hole, 28-folding shield rib, 29-folding shield bolt, 30-folding shield reinforcement plate; 31-flexible dustproof sheet, 32-dustproof sheet pressure plate, 33-dustproof sheet fixing bolt; 41-air nozzle, 42-hose assembly; 51-anchor bolt, 52-lower pressure plate, 53 upper pressure plate; 81-bottom shaft support hole. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1 to 4 The utility model is further described in detail with examples.

[0034] Obviously, the described embodiments are only representative embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figures 1 to 4 The orientation or position relationship shown is only for the convenience of describing the utility model to simplify the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the dimensions are all measured from the center line.

[0036] The bidirectional water-retaining air shield dam body comprises: an arcuate shield plate 1 for upstream water retaining, a folding shield plate 2 for downstream water retaining, a connecting shaft 3 between the arcuate shield plate 1 and the folding shield plate 2, a rubber airbag 4, a main anchoring system 5, a hinged cover plate 6, an air filling and exhaust pipeline 7 and a bottom shaft support 8.

[0037] The upstream water retaining arc shield plate 1 comprises a top self-lubricating ring 11 and a top shaft hole 12 at its top, arc ribs 13 parallel to the shield plate body, a wave-breaking plate 14, and arc shield plate bolts 15 and an arc shield plate reinforcing plate 16 for fixing the intermediate stop seal and connecting the hinge cover plate.

[0038] The downstream water-blocking folding shield 2 includes an upper shaft hole 21 at its top, a connecting middle shaft 22, a middle shaft self-lubricating ring 23, a middle shaft hole 24, a bottom shaft 25, a bottom self-lubricating ring 26, a bottom shaft hole 27 at its bottom, folding shield ribs 28 parallel to the shield body, folding shield bolts 29 for fixing the seal, and a folding shield reinforcement plate 30.

[0039] The connecting shaft 3 comprises a connecting shaft flexible dustproof sheet 31 , a dustproof sheet pressing plate 32 , and a dustproof sheet fixing bolt 33 .

[0040] The rubber airbag 4 includes an air nozzle 41 and a rubber hose assembly 42 .

[0041] The main anchoring system 5 includes anchor bolts 51 , a lower pressure plate 52 , and an upper pressure plate 53 .

[0042] A support hole 81 is provided at the upper end of the bottom shaft support 8 .

[0043] The bidirectional water retaining air shield dam body is composed of units equally divided according to integers of the total length of the overall bidirectional water retaining air shield dam.

[0044] The top axial hole 12, the upper axial hole 21, the middle axial hole 24 and the bottom axial hole 27 penetrate the bidirectional water-retaining air shield dam body.

[0045] The top axial hole 12 and the upper axial hole 21 are of equal width and alternately penetrate the bidirectional water retaining air shield dam body.

[0046] The top self-lubricating ring 11, the middle shaft self-lubricating ring 23 and the bottom self-lubricating ring 26 are made of high molecular self-lubricating materials, and are made of polytetrafluoroethylene, polyoxymethylene or ultra-high molecular weight polyethylene.

[0047] The flexible dustproof sheet 31 is made of EPDM rubber or PVC tape.

[0048] The outer diameters of the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 match the top shaft hole 12, the upper shaft hole 21, the middle shaft hole 24, and the bottom shaft hole 27; the inner diameters match the connecting shaft 3, the connecting middle shaft 22, and the bottom shaft 25; the width is 400mm to 600mm; the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 of the bidirectional water retaining air shield dam body are each provided with 3; they are respectively arranged at the two ends and the middle of the bidirectional water retaining air shield dam body.

[0049] The connecting shaft 3, the connecting middle shaft 22 and the bottom shaft 25 penetrate the bidirectional water-retaining air shield dam body.

[0050] The upper pressing plate 53 is divided into two types, a wedge-shaped upper pressing plate and a flat pressing plate; when the water retaining height is greater than 2.5 m, a wedge-shaped upper pressing plate is used; when the water retaining height is less than 2.5 m, a flat pressing plate is used.

[0051] Example 1

[0052] A bidirectional water-retaining air shield dam with a water retaining capacity of 4.0m and a length of 80m is constructed. The bidirectional water-retaining air shield dam of the utility model has 8 unit structures constituting an integral bidirectional water-retaining air shield dam.

[0053] See attached Figures 1 to 4 And specific implementation methods:

[0054] The arc shield plate 1 for upstream water retaining and the folding shield plate for downstream water retaining of the bidirectional water-retaining air shield dam are made of 2316L stainless steel; the arc shield plate 1 is 9.95m long and the arc length is 4.9m; the folding shield plate 2 is 9.95m long and the arc length is 4.9m, and they are symmetrically 2.45m each on the upper and lower sides; the connecting shaft 3 between the arc shield plate 1 and the folding shield plate 2 is 9.95m long and 0.08m in diameter; the rubber airbag 4 is in the form of a double airbag, the two airbags are of equal size, 9.9m long and 3.9m wide; the upper pressure plate 53 of the main anchoring system 5 is in the form of a wedge-shaped upper pressure plate.

[0055] The top self-lubricating ring 11 and the top shaft hole 12 at the top of the upstream water-blocking arc shield plate 1 match the size of the connecting shaft 3; the arc rib plate 13 has an arc length of 4.7m; the wave-breaking plate 14 is located in the middle of the top of the arc shield plate 1; the arc shield plate bolts 15 that fix the stop seal and connect the hinge cover plate are spaced 0.2m apart and are made of 316L stainless steel with a specification of M16×80mm.

[0056] The upper shaft hole 21 of the folding shield 2 matches the size of the connecting shaft 3; the connecting middle shaft 22 is 9.95m long and 0.06m in diameter; the middle shaft self-lubricating ring 23 and the middle shaft hole 24 match the size of the connecting middle shaft 22; the bottom shaft 25 is 9.95m long and 0.06m in diameter; the bottom self-lubricating ring 26 and the bottom shaft hole 27 match the size of the bottom shaft 25; the upper and lower ribs of the folding shield ribs 28 are each 2.45m long; the folding shield bolts 29 for fixing the spacer seal are M16×80mm, with an interval of 0.25m.

[0057] The flexible dust-proof sheet 31 of the connecting shaft 3 is an EPDM rubber tape; the dust-proof sheet pressing plate 32 has a size of 10×0.2×0.005m, and the dust-proof sheet fixing bolt 33 is M6.

[0058] A support hole 81 is provided at the upper end of the bottom shaft support 8 .

[0059] The top axial hole 12, the upper axial hole 21, the middle axial hole 24 and the bottom axial hole 27 penetrate the bidirectional water-retaining air shield dam body.

[0060] The top axial hole 12 and the upper axial hole 21 are of equal width and alternately penetrate the bidirectional water retaining air shield dam body.

[0061] The top self-lubricating ring 11, the middle shaft self-lubricating ring 23 and the bottom self-lubricating ring 26 are made of polytetrafluoroethylene.

[0062] The flexible dustproof sheet 31 is made of EPDM rubber tape.

[0063] The outer diameters of the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 match the top shaft hole 12, the upper shaft hole 21, the middle shaft hole 24, and the bottom shaft hole 27; the inner diameters match the connecting shaft 3, the connecting middle shaft 22, and the bottom shaft 25; the width is 600mm; the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 of the bidirectional water retaining air shield dam body are each provided with 3; they are respectively arranged at the two ends and the middle of the bidirectional water retaining air shield dam body.

[0064] The connecting shaft 3, the connecting middle shaft 22 and the bottom shaft 25 penetrate the bidirectional water-retaining air shield dam body.

[0065] Example 2

[0066] A bidirectional water-retaining air shield dam with a water retaining capacity of 3.0m and a length of 60m is constructed. The bidirectional water-retaining air shield dam of the utility model has 6 unit structures constituting an integral bidirectional water-retaining air shield dam.

[0067] See attached Figures 1 to 4 , Specific implementation and Example 1:

[0068] The arc shield plate 1 for upstream water retaining and the folding shield plate for downstream water retaining of the bidirectional water-retaining air shield dam are made of 2304 stainless steel; the arc shield plate 1 is 9.95m long and 3.8m long; the folding shield plate 2 is 9.95m long and 3.8m long, and 1.9m long on the upper and lower sides symmetrically; the connecting shaft 3 between the arc shield plate 1 and the folding shield plate 2 is 9.95m long and 0.07m in diameter; the size of the rubber airbag 4 is 9.9m long and 3.0m wide; the upper pressure plate 53 of the main anchoring system 5 is in the form of a wedge-shaped upper pressure plate.

[0069] The top self-lubricating ring 11 and the top shaft hole 12 at the top of the upstream water retaining arc shield plate 1 match the size of the connecting shaft 3; the arc rib plate 13 has an arc length of 3.6m; the arc shield plate bolts 15 that fix the stop seal and connect the hinge cover plate are spaced 0.2m apart and have a specification of M16×80mm.

[0070] The upper shaft hole 21 of the folding shield 2 matches the size of the connecting shaft 3; the connecting middle shaft 22 is 9.95m long and 0.05m in diameter; the middle shaft self-lubricating ring 23 and the middle shaft hole 24 match the size of the connecting middle shaft 22; the bottom shaft 25 is 9.95m long and 0.05m in diameter; the bottom self-lubricating ring 26 and the bottom shaft hole 27 match the size of the bottom shaft 25; the upper and lower ribs of the folding shield ribs 28 are each 1.9m long; the folding shield bolts 29 for fixing the spacer seal are M14, with an interval of 0.25m.

[0071] The flexible dust-proof sheet 31 of the connecting shaft 3 is a PVC tape; the size of the dust-proof sheet pressing plate 32 is 10×0.2×0.005m, and the dust-proof sheet fixing bolt 33 is M5.

[0072] A support hole 81 is provided at the upper end of the bottom shaft support 8 .

[0073] The top axial hole 12, the upper axial hole 21, the middle axial hole 24 and the bottom axial hole 27 penetrate the bidirectional water-retaining air shield dam body.

[0074] The top axial hole 12 and the upper axial hole 21 are of equal width and alternately penetrate the bidirectional water retaining air shield dam body.

[0075] The top self-lubricating ring 11, the middle shaft self-lubricating ring 23 and the bottom self-lubricating ring 26 are made of ultra-high molecular weight polyethylene.

[0076] The flexible dustproof sheet 31 is made of PVC tape.

[0077] The outer diameters of the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 match the top shaft hole 12, the upper shaft hole 21, the middle shaft hole 24, and the bottom shaft hole 27; the inner diameters match the connecting shaft 3, the connecting middle shaft 22, and the bottom shaft 25; the width is 500mm; the lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 of the bidirectional water retaining air shield dam body are each provided with 3; they are respectively arranged at the two ends and the middle of the bidirectional water retaining air shield dam body.

[0078] The connecting shaft 3, the connecting middle shaft 22 and the bottom shaft 25 penetrate the bidirectional water-retaining air shield dam body.

[0079] Other than this, it is the same as Example 1.

[0080] Example 3

[0081] A bidirectional water-retaining air shield dam with a water retaining capacity of 2.0m and a length of 43m is constructed. The four unit structures of the bidirectional water-retaining air shield dam body of the utility model constitute the overall bidirectional water-retaining air shield dam.

[0082] See attached Figures 1 to 4 , Specific implementation and Example 1:

[0083] The arc shield plate 1 for upstream water retaining and the folding shield plate 2 for downstream water retaining of the bidirectional water-retaining air shield dam are made of carbon steel Q355 and are subjected to heavy anti-corrosion treatment; the arc shield plate 1 is 10.7m long and has an arc length of 2.5m; the folding shield plate 2 is 10.7m long and has an arc length of 2.5m, and is symmetrically 1.25m up and down; the connecting shaft 3 between the arc shield plate 1 and the folding shield plate 2 is 10.7m long and 0.05m in diameter; the size of the rubber airbag 4 is 10.65m long and 2.0m wide; the upper pressure plate 53 of the main anchoring system 5 is in the form of a flat plate.

[0084] The top self-lubricating ring 11 and the top shaft hole 12 at the top of the upstream water retaining arc shield plate 1 match the size of the connecting shaft 3; the arc rib plate 13 has an arc length of 2.3m; the arc shield plate bolts 15 that fix the stop seal and connect the hinge cover plate are spaced 0.25mm apart and the specification is M14.

[0085] The upper shaft hole 21 of the folding shield 2 matches the size of the connecting shaft 3; the connecting middle shaft 22 is 10.7m long and 0.04m in diameter; the middle shaft self-lubricating ring 23 and the middle shaft hole 24 match the size of the connecting middle shaft 22; the bottom shaft 25 is 10.7m long and 0.02m in diameter; the bottom self-lubricating ring 26 and the bottom shaft hole 27 match the size of the bottom shaft 25; the upper and lower ribs of the folding shield ribs 28 are each 1.25m long; the folding shield bolts 29 for fixing the spacer seal are M10, with an interval of 0.25m.

[0086] The flexible dust-proof sheet 31 of the connecting shaft 3 is a PVC tape; the size of the dust-proof sheet pressing plate 32 is 10.75×0.2×0.005m, and the dust-proof sheet fixing bolt 33 is M4.

[0087] A support hole 81 is provided at the upper end of the bottom shaft support 8 .

[0088] The top axial hole 12, the upper axial hole 21, the middle axial hole 24 and the bottom axial hole 27 penetrate the bidirectional water-retaining air shield dam body.

[0089] The top axial hole 12 and the upper axial hole 21 are of equal width and alternately penetrate the bidirectional water retaining air shield dam body.

[0090] The top self-lubricating ring 11, the middle shaft self-lubricating ring 23 and the bottom self-lubricating ring 26 are made of polyoxymethylene.

[0091] The flexible dustproof sheet 31 is made of PVC tape.

[0092] The outer diameters of the top self-lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 match the top shaft hole 12, the upper shaft hole 21, the middle shaft hole 24, and the bottom shaft hole 27; the inner diameters match the connecting shaft 3, the connecting middle shaft 22, and the bottom shaft 25; the width is 400mm; the lubricating ring 11, the middle shaft self-lubricating ring 23, and the bottom self-lubricating ring 26 of the bidirectional water retaining air shield dam body are each provided with 3; they are respectively arranged at the two ends and the middle of the bidirectional water retaining air shield dam body.

[0093] The connecting shaft 3, the connecting middle shaft 22 and the bottom shaft 25 penetrate the bidirectional water-retaining air shield dam body.

[0094] Other than this, it is the same as Example 1.

[0095] The utility model forms a new economic growth point, serves as a reference for the design and manufacturing of water conservancy and hydropower facilities technology, the application of materials and the progress of installation, and has important social and economic benefits.

[0096] The above embodiments are preferred representative implementations of the present invention, but the present invention is not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the essence and principles of the present invention are equivalent replacement schemes and should be included in the protection scope of the present invention.

Claims

1. A bidirectional water retaining air shield dam body, which is a unit structure dam body of a water retaining, water control and flood prevention facility air shield dam arranged on a waterway with water both upstream and downstream, and multiple unit structures constitute an integral air shield dam; It is characterized in that The bidirectional water retaining air shield dam body is a unit structure divided equally according to the total length of the overall bidirectional water retaining air shield dam; It comprises: an arc-shaped shield plate (1) for upstream water blocking, a folding shield plate (2) for downstream water blocking, a connecting shaft (3) of the arc-shaped shield plate (1) and the folding shield plate (2), a rubber airbag (4), a main anchoring system (5), a hinged cover plate (6), an air filling and exhaust pipeline (7) and a bottom shaft support (8); The arc-shaped shield plate (1) comprises a top self-lubricating ring (11), a top shaft hole (12), an arc-shaped rib plate (13), a wave-breaking plate (14), an arc-shaped shield plate bolt (15) for fixing a stop seal and connecting a hinge cover plate, and an arc-shaped shield plate reinforcement plate (16); The folding shield (2) is divided into two parts, the upper and lower parts, including an upper shaft hole (21), a connecting middle shaft (22), a middle shaft self-lubricating ring (23), a middle shaft hole (24), a bottom shaft (25), a bottom self-lubricating ring (26), a bottom shaft hole (27), a folding shield rib (28), a folding shield bolt (29) for fixing a spacer seal, and a folding shield reinforcing plate (30); The connecting shaft (3) comprises a flexible dustproof sheet (31) of the connecting shaft, a dustproof sheet pressing plate (32), and a dustproof sheet fixing bolt (33); The rubber airbag (4) comprises an air nozzle (41) and a rubber hose assembly (42); The main anchoring system (5) comprises an anchoring bolt (51), a lower pressing plate (52), and an upper pressing plate (53); The upper end of the bottom shaft support (8) is provided with a support hole (81).

2. A bidirectional water retaining air shield dam according to claim 1, characterized in that: The top axial hole (12), the upper axial hole (21), the middle axial hole (24) and the bottom axial hole (27) are characterized in that they penetrate the bidirectional water-retaining air shield dam body.

3. A bidirectional water retaining air shield dam according to claim 1, characterized in that: The top shaft hole (12) and the upper shaft hole (21) are characterized in that The width alternates through the bidirectional water-retaining air shield dam.

4. A bidirectional water retaining air shield dam according to claim 1, characterized in that: The top self-lubricating ring (11), the middle shaft self-lubricating ring (23) and the bottom self-lubricating ring (26) are characterized by being made of high molecular self-lubricating material, such as polytetrafluoroethylene, polyoxymethylene or ultra-high molecular weight polyethylene.

5. The bidirectional water retaining air shield dam according to claim 1, characterized in that: The flexible dustproof sheet (31) is characterized in that it is made of EPDM rubber or PVC tape.

6. A bidirectional water retaining air shield dam according to claim 5, characterized in that: The outer diameters of the top self-lubricating ring (11), the middle shaft self-lubricating ring (23) and the bottom self-lubricating ring (26) match the top shaft hole (12), the upper shaft hole (21), the middle shaft hole (24) and the bottom shaft hole (27), and are characterized in that the inner diameters match the connecting shaft (3), the connecting middle shaft (22) and the bottom shaft (25); the width is 400 mm to 600 mm; the top self-lubricating ring (11), the middle shaft self-lubricating ring (23) and the bottom self-lubricating ring (26) of the bidirectional water-retaining air shield dam body are each provided with three; and they are respectively provided at the two ends and the middle of the bidirectional water-retaining air shield dam body.

7. The bidirectional water retaining air shield dam according to claim 1, characterized in that: The connecting shaft (3), the connecting middle shaft (22) and the bottom shaft (25) are characterized in that they penetrate the bidirectional water-retaining air shield dam body.

8. The bidirectional water retaining air shield dam according to claim 1, characterized in that: The upper pressing plate (53) is divided into two types, a wedge-shaped upper pressing plate and a flat plate-shaped pressing plate, wherein the upper pressing plate is a wedge-shaped pressing plate when the water retaining height is greater than 2.5 m, and a flat plate-shaped pressing plate when the water retaining height is less than 2.5 m.

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