CN215105426U - Plugging device for steel suspension box cofferdam - Google Patents

Abstract

The utility model relates to a steel hanging box is leaking stoppage device for cofferdam, it includes the roof, be equipped with the opening on the roof of roof, be equipped with the sleeve around the split ring on the diapire of roof, be equipped with the installing port on the roof of cofferdam bottom plate, the sleeve is kept away from the end wall of roof one end and is equipped with the crown plate towards pile foundation pile casing extension, it is equipped with uncovered one to run through on the roof of crown plate, the top ring that lies in the crown plate on the telescopic inner wall is equipped with the baffle, it is equipped with uncovered two to run through on the roof of baffle, uncovered two, uncovered one bore all is greater than the external diameter that pile foundation pile casing protected, the diapire of baffle, enclose between the roof of telescopic inner wall and crown plate and close formation compensating groove, the compensating groove is equipped with the shutoff subassembly, the roof passes through the mounting and installs on the cofferdam bottom plate. This application is through shutoff subassembly and telescopic cooperation, carries out the shutoff to the pile foundation protects the gap between a section of thick bamboo and the baffle to reduce rivers and spill into in the sleeve and the bottom sealing concrete from this gap and spill over the internal possibility in cofferdam from this gap, and then promote this plugging device's shutoff effect.

Description

Plugging device for steel suspension box cofferdam

Technical Field

The application relates to the technical field of steel hanging box cofferdams, in particular to a leaking stoppage device for a steel hanging box cofferdam.

Background

The steel suspension box cofferdam is widely applied to construction of deep water foundation pits of bridge engineering, the steel suspension box cofferdam comprises a plurality of steel sheet piles which are spliced mutually, the steel suspension box cofferdam needs to block a gap between a cofferdam bottom plate and a pile foundation pile casing before underwater concrete back cover pouring is carried out, the back cover refers to the situation that concrete with a certain thickness needs to be poured on the cofferdam bottom plate after the steel suspension box cofferdam reaches a design position, a bearing platform is isolated from the construction water level outside the cofferdam, and after water is pumped in the cofferdam in the later period, the bearing platform carries out dry operation.

The Chinese utility model with the authorized bulletin number of CN210827110U discloses a plugging device for the bottom sealing ring of a steel suspension box cofferdam for waterless operation, which comprises a bottom sealing ring plate, wherein the middle part of the bottom sealing ring plate is fixedly provided with a hollow tube plate, and the bottom sealing ring plate is formed by connecting two or more bottom sealing ring units end to end; during the use, live the pile foundation and protect a section of thick bamboo with two back cover ring unit locks and parcel, protect a section of thick bamboo and sink along the pile foundation under the dead weight effect, on falling the end keel of cofferdam bottom plate, the back cover concrete is poured again.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when the bottom sealing ring plate sinks to the bottom keel of the cofferdam bottom plate, a gap exists between the bottom wall of the bottom sealing ring plate and the top wall of the cofferdam bottom plate, when workers dry accumulated water in the cofferdam and start pouring bottom sealing concrete, the possibility that external water flows into the cofferdam from the gap and part of the bottom sealing concrete flows out of the cofferdam from the gap exists, and the plugging effect of the plugging device is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that plugging effect of plugging device reduces, this application provides a plugging device for steel suspension box cofferdam.

The application provides a leaking stoppage device for steel suspension box cofferdam adopts following technical scheme:

a plugging device for a steel hanging box cofferdam comprises a top plate, wherein an opening is arranged on the top wall of the top plate, the bottom wall of the top plate is provided with a sleeve around the split ring, the top wall of the cofferdam bottom plate matched with the plugging device is provided with a mounting hole for the sleeve to extend into and extend out, the end wall of the sleeve far away from one end of the top plate extends towards the pile foundation casing to be provided with a ring plate, the top wall of the ring plate is provided with an opening I in a penetrating way, a baffle plate is annularly arranged on the inner wall of the sleeve above the annular plate, an opening II is arranged on the top wall of the baffle plate in a penetrating way, the calibers of the second opening and the first opening are larger than the outer diameter of the pile foundation casing, a compensation groove is formed by enclosing the bottom wall of the partition plate, the inner wall of the sleeve and the top wall of the ring plate, the compensation tank is internally provided with a plugging component for plugging a gap between the pile foundation casing and the partition plate, and the top plate is installed on the cofferdam bottom plate through a fixing piece.

By adopting the technical scheme, a worker firstly installs the plugging component in the compensation groove, then penetrates the sleeve from the installation port to the bottom wall of the top plate to be received on the top wall of the cofferdam bottom plate, and fixes the top plate by using the fixing piece, so that the plugging device is stably installed on the cofferdam bottom plate; through shutoff subassembly and telescopic cooperation, carry out the shutoff to the gap between pile foundation pile casing and the baffle to reduce rivers and spill into in the sleeve and the bottom sealing concrete spills over the internal possibility in cofferdam from this gap, and then promote this plugging device's shutoff effect from this gap.

Optionally, the cell wall of compensation groove is fitted with a contraceptive ring and is equipped with the fixed slot, the shutoff subassembly includes waterproof sealing member and compensating seal spare, waterproof sealing member includes waterproof sealing strip, be equipped with the installation arch on waterproof sealing strip's the lateral wall, the installation arch cooperates with the fixed slot inlay card, waterproof sealing strip is close to the lateral wall that pile foundation protected a section of thick bamboo one side and pile foundation protected a lateral wall to tightly.

Through adopting above-mentioned technical scheme, utilize the cooperation of installation arch and fixed slot, make things convenient for the workman to stably install waterproof sealing strip at the compensation inslot, because there is friction loss waterproof sealing strip and pile foundation protect between the lateral wall of a section of thick bamboo for there is the clearance between the lateral wall of a section of thick bamboo and the baffle is protected to the pile foundation, so set up the compensating seal spare and seal up this clearance, thereby guarantee the shutoff effect of this plugging device.

Optionally, the inside wall that baffle one end was kept away from to waterproof sealing strip is equipped with the recess, it has the design bounding wall to bond in the recess, it is connected with the ball to rotate through the pivot on the two relative inside walls of design bounding wall, the ball protects the lateral wall roll connection of a section of thick bamboo with the pile foundation.

Through adopting above-mentioned technical scheme, because waterproof sealing strip has certain compliance, utilize the design bounding wall to finalize the design to the recess to guarantee the relative stability of pivot and ball, when this plugging device followed the cofferdam and transferred in step, the waterproof sealing strip and the steel sheet pile friction of top supported tightly, and ball roll connection helps reducing the frictional force between waterproof sealing strip and the pile foundation protects a lateral wall of section of thick bamboo, thereby promote the smooth and easy nature when this plugging device transfers.

Optionally, the compensation sealing member includes the water swelling sealing rod of meeting water swelling, the water swelling sealing rod of meeting water bonds with waterproof sealing strip, be equipped with the dashpot on the cell wall of compensation groove.

By adopting the technical scheme, when the lowering depth of the cofferdam body is deeper, the waterproof sealing strip is tightly abutted to the side wall of the protective cylinder by virtue of friction force, so that the side, abutted to the outer side wall of the pile foundation protective cylinder, of the waterproof sealing strip is abraded, a micro gap is generated between the waterproof sealing strip and the outer side wall of the pile foundation protective cylinder, and the water-swelling water-stopping strip can swell when meeting water flow, so that the gap is sealed, and the waterproof sealing performance between the plugging device and the outer side wall of the pile foundation protective cylinder is further ensured; and under the effect of dashpot, help alleviating the pressure between the inflation back of meeting water inflation sealing rod and the sleeve inner wall.

Optionally, the sleeve is kept away from the end wall of roof one end and is gone towards one side of keeping away from the pile foundation casing and extend there is the fixed plate, be equipped with a plurality of strengthening ribs between the roof of fixed plate and telescopic lateral wall, run through on the lateral wall of strengthening rib and be equipped with a plurality of pressure relief holes.

Through adopting above-mentioned technical scheme, when meeting water inflation sealing rod and taking place the inflation, utilize the dashpot to play certain effect of alleviating, and utilize the strengthening rib can further promote this telescopic compressive capacity to reduce the possibility of sleeve deformation, and under the effect in slowly pressing the hole, play certain slowly pressing effect to the strengthening rib that gets into below the water level.

Optionally, a receiving groove is formed in the top wall of the cofferdam bottom plate matched with the leakage stopping device and located on the periphery of the mounting port, the top plate is in clamping and embedding fit with the receiving groove, a sealing element is arranged on the bottom wall of the top plate, and the fixing element comprises a fixing bolt.

Through adopting above-mentioned technical scheme, when the roof inlay card was in accepting the inslot, the sealing member stable clamp was established between the diapire of roof and the tank bottom wall of accepting the groove, helps promoting the waterproof sealing nature between roof and the cofferdam bottom plate, utilizes fixing bolt to fix roof and cofferdam bottom plate, and is simple and convenient.

Optionally, the sealing member includes waterproof sealing layer, enclose between the lateral wall of waterproof sealing layer and the diapire of roof and close and form the mounting groove, fixing bolt's one end runs through the roof of roof and stretches into in the mounting groove, fixing bolt stretches into the one end in the mounting groove and accepts groove threaded connection.

Through adopting above-mentioned technical scheme, utilize waterproof sealing layer to seal the junction of roof and cofferdam bottom plate, reserve the mounting groove for when fixing bolt and thread groove threaded connection, because fixing bolt does not pass waterproof sealing layer, thereby guarantee waterproof sealing layer's integrality and performance.

Optionally, a containing groove is formed in the top wall of the top plate, and a handle is hinged in the containing groove.

Through adopting above-mentioned technical scheme, set up the handle, make things convenient for the workman to get and put the roof, after the workman stabilizes the inlay card with the roof and accepts the inslot, rotate the handle and accomodate holding the inslot to the handle to guarantee the roughness of roof.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the plugging assembly is matched with the sleeve to plug a gap between the pile foundation casing and the partition plate, so that the possibility that water flows into the sleeve from the gap and bottom sealing concrete flows out of the cofferdam body from the gap is reduced, and the plugging effect of the plugging device is improved;

2. the waterproof sealing strip is matched with the compensation sealing element to seal a gap between the outer side wall of the pile foundation casing and the partition plate, so that the plugging effect of the plugging device is ensured;

3. through the matching of the shaping frame, the rotating shaft and the balls, the friction force between the waterproof sealing strip and the outer wall of the pile foundation casing is reduced, so that the smoothness of the leak stopping device during the lowering is improved;

4. when the water-proof sealing strip is rubbed with the pile foundation casing to form a gap, the water-swelling sealing strip can swell when meeting water flow, so that the gap is sealed, and the water-proof sealing property between the plugging device and the outer side wall of the pile foundation casing is further ensured; under the action of the buffer groove, the pressure between the expanded water stop rod and the inner wall of the sleeve is favorably relieved;

5. the pressure resistance of the sleeve can be further improved by utilizing the reinforcing ribs, so that the possibility of deformation of the sleeve is reduced, and the reinforcing ribs below the water level have a certain pressure relief effect under the action of the pressure relief holes;

6. utilize waterproof sealing layer to seal the junction of roof and cofferdam bottom plate, reserve the mounting groove for when fixing bolt and thread groove threaded connection, because fixing bolt does not pass waterproof sealing layer, thereby guarantee waterproof sealing layer's integrality and performance.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic sectional structure diagram for showing the connection relationship among the pile casing, the cofferdam bottom plate, the top plate, the sleeve, the partition plate, the ring plate and the plugging component in the embodiment of the application.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is an enlarged view at B in fig. 3.

Fig. 5 is an enlarged view at C in fig. 2.

Description of reference numerals: 1. a top plate; 10. an opening; 11. a containing groove; 2. a sleeve; 3. a cofferdam bottom plate; 30. an installation port; 31. a receiving groove; 4. a ring plate; 40. opening one; 5. a partition plate; 50. opening two; 6. pile foundation casing; 7. a compensation groove; 71. fixing grooves; 72. a buffer tank; 8. a plugging component; 81. a waterproof seal; 811. mounting a boss; 812. a groove; 82. a compensating seal; 9. a fixing member; 12. shaping the coaming; 13. a rotating shaft; 14. a ball bearing; 15. a fixing plate; 16. reinforcing ribs; 160. slowly pressing the hole; 17. a waterproof sealing layer; 18. mounting grooves; 19. a handle.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a leaking stoppage device for a steel suspension box cofferdam. Referring to fig. 1, the leakage blocking device for the steel suspension box cofferdam comprises a top plate 1, a sleeve 2, a ring plate 4, a partition plate 5 and a blocking assembly 8, a mounting port 30 is arranged on the top wall of a cofferdam bottom plate 3 matched with the leakage blocking device, a receiving groove 31 is arranged on the top wall of the cofferdam bottom plate 3 around the mounting port 30, the bottom wall of the top plate 1 close to the edge is received in the receiving groove 31, the cross section of the top plate 1 is rectangular, an opening 10 is arranged on the top wall of the top plate 1 in a penetrating mode, the top plate 1 is installed on the cofferdam bottom plate 3 through a fixing piece 9, the fixing piece 9 comprises a fixing bolt, the top plate 1 is provided with a containing groove 11 on the top wall of two sides of the opening 10, a handle 19 is hinged in the containing groove 11, the handle 19 is utilized, the leakage blocking device is convenient for a worker to take and place, the handle 19 is stored through the containing groove 11, and the flatness of the top wall of the top plate 1 is kept.

Referring to fig. 1 and 2, the sleeve 2 is fixedly connected to the bottom wall of the top plate 1, the sleeve 2 is arranged around the opening 10, the diameter of the cross section of the sleeve 2 decreases progressively from the side away from the top plate 1, and when the sleeve 2 extends into the water, the water flow resistance on the outer wall of the sleeve 2 is reduced, so that the possibility of deformation of the sleeve 2 is reduced.

Referring to fig. 2 and 3, the crown plate 4 sets up on the end wall of roof 1 one end is kept away from to sleeve 2, run through on the roof of crown plate 4 and be equipped with uncovered one 40, baffle 5 encircles and is established on the inner wall of sleeve 2, and baffle 5 sets up the top at crown plate 4, run through on the roof of baffle 5 and be equipped with uncovered two 50, the bore of uncovered one 40 all is greater than the pile foundation and protects the external diameter of a section of thick bamboo 6, baffle 5, crown plate 4 all can with sleeve 2 integrated into one piece, the diapire of baffle 5, enclose between the roof of sleeve 2's the inner wall and crown plate 4 and close and form compensating groove 7, shutoff subassembly 8 sets up in compensating groove 7.

Referring to fig. 2 and 3, when installing this plugging device, the workman passes sleeve 2 earlier and accepts in accepting groove 31 to roof 1, and install this plugging device on cofferdam bottom plate 3 through fixing bolt, when this plugging device followed the cofferdam body and transferred along the lateral wall of pile foundation casing 6, seal up the gap between 6 outer walls of pile foundation casing and baffle 5 through shutoff subassembly 8, thereby reduce rivers and get into in sleeve 2 and the bottom sealing concrete from the gap and spill over the external possibility of cofferdam, and then guarantee this plugging device's shutoff effect.

Referring to fig. 2 and 3, on the groove diapire of compensation groove 7 and the groove lateral wall fit with a contraceptive ring and be equipped with fixed slot 71, be equipped with dashpot 72 on the groove roof of compensation groove 7 and the groove lateral wall, shutoff subassembly 8 includes waterproof sealing member 81 and compensating sealing member 82, waterproof sealing member 81 includes waterproof sealing strip, be equipped with on waterproof sealing strip's the lateral wall with fixed slot 71 inlay card complex installation arch 811, installation arch 811 can with waterproof sealing strip integrated into one piece, compensating sealing member 82 includes water swelling sealing strip, water swelling sealing strip bonds through waterproof sealing glue and waterproof sealing strip, water swelling sealing strip and waterproof sealing strip in this application distribute from top to bottom along vertical direction.

Referring to fig. 2 and 3, when this plugging device transfers, there is certain friction loss between waterproof sealing strip and pile foundation protect a 6 outer walls for produce the gap between waterproof sealing strip and pile foundation protect the outer wall of a 6, at this moment, lie in the water-swelling sealing rod inflation of meeting of top, thereby seal up this gap, and then guarantee this plugging device's shutoff effect.

Referring to fig. 2 and 3, a fixing plate 15 extends outwards from an end wall of one end of the sleeve 2, which is far away from the top plate 1, the fixing plate 15 can be integrally formed with the sleeve 2, a bottom wall of the fixing plate 15 is flush with a bottom wall of the ring plate 4, a reinforcing rib 16 is welded between a top wall of the fixing plate 15 and an outer side wall of the sleeve 2, and a plurality of pressure relief holes 160 penetrate through a side wall of the reinforcing rib 16; because when meeting water inflation sealing rod inflation, utilize buffer tank 72 can alleviate the pressure that produces the sleeve 2 inner wall after meeting water inflation sealing rod's inflation, simultaneously, under the cooperation of strengthening rib 16 and fixed plate 15, can strengthen the compressive capacity of sleeve 2 bottom to reduce the possibility that sleeve 2 inner wall produced deformation.

Referring to fig. 2 and 4, a groove 812 is formed in the inner side wall of the waterproof sealing strip, a shaping surrounding plate 12 is bonded in the groove 812, two opposite inner side walls of the shaping surrounding plate 12 are rotatably connected with a ball 14 through a rotating shaft 13, and the ball 14 is in rolling connection with the outer side wall of the pile foundation casing 6; when sleeve 2 protected a section of thick bamboo 6 along the pile foundation and transferred, the lateral wall that waterproof sealing strip was close to pile foundation and protects a 6 one side and pile foundation and protect a lateral wall friction of a 6 tightly, and at this moment, 14 roll connections of ball help reducing the frictional resistance between waterproof sealing strip and the pile foundation protects a 6 on the lateral wall of a 6 to promote the stability when this plugging device transferred.

Referring to fig. 2 and 5, a thread groove is arranged on the bottom wall of the receiving groove 31, a sealing element is adhered to the bottom wall of the top plate 1 through waterproof sealant, the sealing element comprises a waterproof sealing layer 17, the waterproof sealing layer 17 is formed by cutting a rubber water stop, an installation groove 18 is formed by enclosing the side wall of the waterproof sealing layer 17 and the groove wall of the receiving groove 31, a fixing bolt penetrates through one end of the top plate 1 and extends into the installation groove 18, and the end of the fixing bolt extending into the installation groove 18 is in threaded connection with the thread groove, so that the top plate 1 is tightly fixed on the cofferdam bottom plate 3; and because the fixing bolt does not pass through the waterproof sealing layer 17, the integrality and the service performance of the waterproof sealing layer 17 are ensured.

Referring to fig. 2 and 5, the rubber water stop has good sealing performance, and when the rubber water stop encounters water, the rubber water stop expands to seal a gap between the top plate 1 and the cofferdam bottom plate 3, so that the waterproof sealing performance between the plugging device and the cofferdam bottom plate 3 is ensured; and the mounting groove 18 is used for receiving the expanded rubber water stop, so that a certain pressure relief effect can be realized on the joint of the top plate 1 and the cofferdam bottom plate 3.

The implementation principle of the plugging device for the steel suspension box cofferdam in the embodiment of the application is as follows: when plugging, a worker firstly pulls the handle 19 to stably clamp and embed the top plate 1 in the receiving groove 31 and fixes the top plate 1 on the cofferdam bottom plate 3 by using the fixing bolt, at the moment, the waterproof sealing layer 17 is tightly pressed in the receiving groove 31 to be conductive to ensuring the waterproof sealing performance of the joint of the top plate 1 and the cofferdam bottom plate 3, the worker then synchronously lowers the cofferdam body and the plugging device along the pile foundation protection tube 6, in the lowering process, the waterproof sealing strip and the water-swelling water-stopping strip are both tightly pressed against the outer side wall of the pile foundation protection tube 6, the waterproof sealing strip and the water-swelling water-stopping strip have the possibility of generating friction loss with the outer side wall of the pile foundation protection tube 6, under the matching of the rotating shaft 13 and the rolling balls 14, the friction resistance between the waterproof sealing strip and the outer side wall of the pile foundation protection tube 6 is favorably reduced, so that the smoothness of the plugging device when the plugging device is lowered is improved, and the plugging device expands when the water-swelling water-stopping strip is met, the gap between the outer side wall of the pile foundation casing 6 and the partition plate 5 is sealed, so that the plugging effect of the plugging device is ensured.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a leaking stoppage device for steel hanging box cofferdam which characterized in that: comprises a top plate (1), an opening (10) is arranged on the top wall of the top plate (1), a sleeve (2) is annularly arranged on the bottom wall of the top plate (1) around the opening (10), a mounting hole (30) for the sleeve (2) to extend into and extend out is arranged on the top wall of a cofferdam bottom plate (3) matched with the leakage stoppage device, a ring plate (4) is arranged on the end wall of one end, far away from the top plate (1), of the sleeve (2) in an extending way towards a pile foundation protection tube (6), an opening I (40) is arranged on the top wall of the ring plate (4) in a penetrating way, a partition plate (5) is annularly arranged on the inner wall of the sleeve (2) above the ring plate (4), an opening II (50) is arranged on the top wall of the partition plate (5) in a penetrating way, the calibers of the opening II (50) and the opening I (40) are all larger than the outer diameter of the pile foundation protection tube (6), a compensation groove (7) is formed by enclosing among the bottom wall of the partition plate (5), the inner wall of the sleeve (2) and the top wall of the ring plate (4), the cofferdam comprises a cofferdam bottom plate (3) and is characterized in that a compensation groove (7) is internally provided with a plugging assembly (8) for plugging a gap between a pile foundation pile casing (6) and a partition plate (5), and the top plate (1) is installed on the cofferdam bottom plate (3) through a fixing piece (9).

2. The plugging device for the steel suspension box cofferdam of claim 1, wherein: the cell wall of compensation groove (7) is fitted with a contraceptive ring and is equipped with fixed slot (71), shutoff subassembly (8) are including waterproof sealing member (81) and compensation sealing member (82), waterproof sealing member (81) are including waterproof sealing strip, be equipped with installation arch (811) on waterproof sealing strip's the lateral wall, installation arch (811) and fixed slot (71) inlay card cooperation, waterproof sealing strip is close to the pile foundation and protects the lateral wall of a section of thick bamboo (6) one side and the pile foundation and protect the lateral wall of a section of thick bamboo (6) and support tightly.

3. The plugging device for the steel suspension box cofferdam of claim 2, wherein: waterproof sealing strip keeps away from and is equipped with recess (812) on the inside wall of baffle (5) one end, recess (812) internal bonding has design bounding wall (12), it is connected with ball (14) to rotate through pivot (13) on two relative inside walls of design bounding wall (12), ball (14) and pile foundation protect the lateral wall roll connection of a section of thick bamboo (6).

4. The plugging device for the steel suspension box cofferdam of claim 2, wherein: the compensation sealing member (82) includes the water swelling sealing rod, the water swelling sealing rod bonds with waterproof sealing strip, be equipped with dashpot (72) on the cell wall of compensation groove (7).

5. The plugging device for the steel suspension box cofferdam of claim 4, wherein: the sleeve (2) is kept away from the end wall of roof (1) one end and is gone towards one side of keeping away from pile foundation casing (6) and extend and have fixed plate (15), be equipped with a plurality of strengthening ribs (16) between the roof of fixed plate (15) and the outside wall of sleeve (2), run through on the lateral wall of strengthening rib (16) and be equipped with a plurality of pressure relief hole (160).

6. The plugging device for the steel suspension box cofferdam of claim 1, wherein: the top wall of the cofferdam bottom plate (3) matched with the leakage stopping device is provided with a bearing groove (31) on the periphery side of the mounting port (30), the top plate (1) is in embedded fit with the bearing groove (31), the bottom wall of the top plate (1) is provided with a sealing element, and the fixing piece (9) comprises a fixing bolt.

7. The plugging device for the steel suspension box cofferdam of claim 6, wherein: the sealing member includes waterproof sealing layer (17), enclose between the lateral wall of waterproof sealing layer (17) and the diapire of roof (1) and close formation mounting groove (18), fixing bolt's one end runs through the roof of roof (1) and stretches into in mounting groove (18), fixing bolt stretches into the one end in mounting groove (18) and accepts groove (31) threaded connection.

8. The plugging device for the steel suspension box cofferdam of claim 1, wherein: the top wall of the top plate (1) is provided with a containing groove (11), and a handle (19) is hinged in the containing groove (11).

Images