CN210460667U

CN210460667U - Inflatable shield tail sealing device

Info

Publication number: CN210460667U
Application number: CN201921579546.1U
Authority: CN
Inventors: 朱湘旭; 吴浩凯
Original assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Current assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-05-05
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses an inflatable shield tail sealing device, which comprises a shield tail, a linear driver, a connecting rod and at least two air bags; the air bag comprises an air bag body, an air faucet and a connecting piece, wherein one end of the air faucet is inserted into the air bag body, the other end of the air faucet is inserted into the connecting piece, and two ends of the connecting piece are respectively provided with a tenon and a mortise which can be mutually occluded; connecting pieces of adjacent air bags are meshed with each other, and the connecting pieces are embedded into the grooves of the shield tail; a gas pipeline is arranged in the shield tail; one end of the connecting rod is connected with the telescopic rod of the linear driver, and the other end of the connecting rod is embedded into the mortise of the connecting piece of the air bag. The utility model discloses utilize tenon and the tongue-and-groove of connecting piece and cooperate the recess of shield tail to realize the fixed of gasbag, this kind of design can keep fixed when making the gasbag be in shield tail inside, and the gasbag produces the dislocation unhook rapidly after leaving the shield tail, and the user carries out simple release action and can abandons the gasbag of wearing and tearing, can also fill in new gasbag in shield tail inside simultaneously and supply, very big simplification the operation of changing the gasbag.

Description

Inflatable shield tail sealing device

Technical Field

The utility model relates to a shield constructs the machine field, especially relates to an inflatable shield tail sealing device.

Background

Fig. 1 is a structural diagram of a shield tail of a shield tunneling machine commonly used in the prior art, and comprises a shield tail 1, three shield tail brushes 2, a grease pipeline 101 and a mud pipeline 102. The basic workflow is as follows: with the work of the shield tunneling machine, the shield tail 1 moves forwards continuously (moves leftwards in fig. 1), the pipe piece 3 is increased (the pipe piece 3 is increased continuously in fig. 1, so that the pipe piece 3 extends leftwards), in the process, the slurry pipeline 102 fills slurry 5 between the pipe piece 3 and the soil layer 4, and the grease pipeline 101 fills grease 6 into the space between the shield tail brushes 2. The grease 6 and the shield tail brush 2 form a seal together, so that mud 5 is prevented from entering the shield tail 1.

The grease and shield tail brush type sealing structure is easy to lose efficacy when the mud pressure is large and the duct piece is dislocated, so that an air bag type structure is provided for a shield tail sealing device and a shield machine in Chinese patent application No. 201510445604.1 to replace the traditional grease and shield tail brush sealing structure. The drawbacks of this balloon-type structure are: the shield machine has quite severe working environment, the air bag inevitably generates friction with the duct piece, the slurry and the soil layer in the underground high-pressure environment, the abrasion consumption is large, and the air bag must be frequently replaced; but the gasbag is in the clearance of shield tail and section of jurisdiction, and the space is very narrow and small, changes the difficulty.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an inflatable shield tail sealing device adopts movable structrual installation gasbag, and convenience of customers changes the gasbag in the shield tail is inside.

In order to solve the technical problem, the utility model discloses a technical scheme does: an inflatable shield tail sealing device comprises a shield tail, a linear driver, a connecting rod and at least two air bags;

the air bag comprises an air bag body, an air faucet and a connecting piece, wherein the air bag body is annular, one end of the air faucet is inserted into the air bag body, the other end of the air faucet is inserted into the connecting piece, and two ends of the connecting piece are respectively provided with a tenon and a mortise which can be mutually occluded;

the inner wall of the shield tail is provided with a groove along the axial direction, all the air bags are sleeved on the pipe sheet, the connecting pieces of the adjacent air bags are mutually occluded, and the connecting pieces are embedded into the groove of the shield tail; a gas pipeline and a slurry pipeline are arranged in the shield tail, an exhaust port of the gas pipeline is connected with an air nozzle in the groove, and a sludge discharge port of the slurry pipeline is positioned at the tail end of the shield tail;

the shield tail inner wall of straight line driver installation, the one end and the telescopic link of straight line driver of connecting rod are connected, and the tongue-and-groove of the connecting piece of the other end embedding gasbag is in.

When the utility model is used, the connecting pieces of all the air bags are embedded into the grooves of the shield tail, the connecting pieces are mutually hooked through the tenon and the mortise, and the connecting piece of the innermost air bag is connected with the linear driver through the connecting rod, so that the fixed installation of all the air bags is realized; when the air bag is worn and needs to be replaced (regular replacement can be selected, namely the air bag is replaced no matter damaged or not after being used for a specified time), the telescopic rod of the linear driver extends outwards to push the air bag on the outermost side out of the gap between the shield tail and the duct piece, and the connecting piece of the air bag on the outermost side is separated from the groove of the shield tail; after the limit of the groove is lost, the connecting piece of the air bag at the outermost side is easily dislocated under the influence of external forces such as scouring of slurry and vibration of equipment, and is unhooked from the connecting piece of the adjacent air bag, so that the connecting piece is abandoned in the slurry. Then the worker removes the connecting rod in the shield tail and withdraws the telescopic rod of the linear driver, plugs a new air bag into the gap between the shield tail and the duct piece, hooks the connecting pieces again, and finally inflates the new air bag and reinstalls the connecting rod. The air bag can be replaced through the steps, the whole replacement process is carried out inside the shield tail, and at least one air bag is in a normal working state all the time in the replacement process, so that the phenomenon that slurry permeates into the shield tail is avoided.

Further, a first spring is sleeved on the air tap and is positioned inside the air bag body; the first spring can maintain the airbag body in a basically inflated state when the airbag body is not inflated, and the level of the connecting piece is kept; when the air bag body is sleeved on the pipe sheet, the first spring can prevent the installed connecting piece from inclining due to dead weight.

Specifically, the number of the air nozzles is multiple, and the air nozzles are uniformly distributed around the central axis of the air bag body; each air nozzle is provided with a connecting piece, and the air nozzles and the connecting pieces are used for inflating the air bag body and fixing the air bag body, generally, the number of the air nozzles is not less than six, and can be eight, ten or more. It should be added that the air faucet of the utility model has the function of matching with the connecting piece, so the number is more; but need not design the gas pipeline unanimous with air cock quantity in the shield tail, the quantity of gas pipeline can satisfy to the gasbag body inflate can, it is also can that partial air cock does not have the gas pipeline in the recess at place.

Specifically, the connecting rod comprises a cross rod and a vertical rod, the first end of the cross rod is connected with the middle part of the vertical rod to form a T-shaped structure, and the second end of the cross rod is connected with a telescopic rod of the linear driver; the third end of montant imbeds in the tongue-and-groove, and the fourth end of montant holds the head and has the second spring, and the end of second spring supports the section of jurisdiction.

Furthermore, the connecting rod also comprises a connecting plate, the connecting plate is connected with a telescopic rod of the linear driver through a bolt, a spherical base is arranged on the connecting plate, the second end of the cross rod is spherical, and the second end of the cross rod is embedded into the spherical base; spherical second end and spherical base make the connecting rod whole can produce certain angle, increase the flexibility of connecting rod, avoid blocking.

Further, the surface of connecting piece is provided with the ring channel, installs the rubber gasket in the ring channel, and rubber gasket and air cock laminating, rubber gasket are used for increasing the leakproofness of air cock and recess inner wall.

Further, the linear actuator is a hydraulic cylinder.

Has the advantages that: (1) the utility model discloses an inflatable shield tail sealing device sets up the connecting piece on the gasbag, utilize tenon and the tongue-and-groove of connecting piece and the recess of cooperation shield tail to realize the fixed of gasbag, this kind of design makes gasbag and shield tail not have direct fixed relation, can keep fixed when the gasbag is in shield tail inside, the gasbag produces the dislocation unhook rapidly after leaving the shield tail, the user carries out simple release action and can abandons the gasbag of wearing and tearing, can also fill in new gasbag and supply in shield tail inside simultaneously, very big simplification changes the operation of gasbag. (2) The inflatable shield tail sealing device of the utility model is provided with the first spring in the air bag body, so as to maintain the air bag body in a basic filling state when the air bag body is not inflated, and keep the level of the connecting piece; when the air bag body is sleeved on the pipe sheet, the first spring can prevent the installed connecting piece from inclining due to dead weight. (3) the utility model discloses an inflatable shield tail sealing device sets up spherical base in the connecting plate, utilizes the spherical second end of horizontal pole and spherical base to form universal head structure, increases the flexibility of connecting rod, avoids blocking.

Drawings

Fig. 1 is a structural diagram of a tail of a shield tunneling machine in the prior art.

Fig. 2 is a schematic structural view of the inflatable shield tail sealing device in the embodiment 1.

Fig. 3 is an enlarged view a of fig. 2.

Fig. 4 is a front view of the airbag in embodiment 1.

Fig. 5 is (a) the working state diagram of the inflatable shield tail sealing device in the embodiment 1.

Fig. 6 is the working state diagram of the inflatable shield tail sealing device of the embodiment 1 (the second embodiment).

Fig. 7 is the working state diagram (third) of the inflatable shield tail sealing device in the embodiment 1.

Wherein: 1. a shield tail; 101. a grease pipeline; 102. a slurry pipeline; 103. a groove; 104. a gas line; 2. a shield tail brush; 3. a duct piece; 4. a soil layer; 5. slurry; 6. grease; 7. a linear actuator; 8. a connecting rod; 801. a cross bar; 802. a vertical rod; 803. a connecting plate; 804. a second spring; 9. an air bag; 901. an airbag body; 902. an air tap; 903. a connecting member; 904. a first spring; 905. a rubber gasket.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example 1

As shown in fig. 2 and 3, the inflatable shield tail sealing device of the present embodiment comprises a shield tail 1, a linear driver 7, a connecting rod 8 and two air bags 9;

as shown in fig. 3 and 4, the airbag 9 includes an airbag body 901, an air faucet 902 and a connector 903, the airbag body 901 is circular, one end of the air faucet 902 is inserted into the airbag body 901, the other end of the air faucet 902 is inserted into the connector 903, and one end of the air faucet 902 located in the airbag body 901 is sleeved with a first spring 904; the surface of the connecting piece 903 is provided with an annular groove, a rubber gasket 905 is arranged in the annular groove, and two ends of the connecting piece 903 are provided with a tenon and a mortise which can be engaged with each other; the air nozzles 902 are uniformly distributed around the central axis of the air bag body 901; each air tap 902 is provided with a connecting piece 903, the air tap 902 and the connecting piece 903 are used for inflating the airbag body 901 and fixing the airbag body 901, and the number of the air taps 902 and the connecting pieces 903 is ten in the embodiment;

the inner wall of the shield tail 1 is provided with a groove 103 along the axial direction, all the air bags 9 are sleeved on the segment 3, the connecting pieces 903 of the adjacent air bags 9 are mutually occluded, and the connecting pieces 903 are embedded in the groove 103 of the shield tail 1; a gas pipeline 104 is arranged in the shield tail 1, and an exhaust port of the gas pipeline 104 is connected with the gas nozzle 902 in the groove 103; a slurry pipeline 102 is also arranged in the shield tail 1;

in the embodiment, a hydraulic cylinder is used as a linear driver 7, and the linear driver 7 is arranged on the inner wall of the shield tail 1;

the connecting rod 8 comprises a cross rod 801, a vertical rod 802 and a connecting plate 803, wherein a first end of the cross rod 801 is connected with the middle of the vertical rod 802 to form a T-shaped structure, and a second end of the cross rod 801 is spherical; the third end of the vertical rod 802 is embedded into the mortise, the fourth end of the vertical rod 802 is sleeved with a second spring 804, and the tail end of the second spring 804 is propped against the pipe piece 3; the connecting plate 803 is connected with the telescopic rod of the linear driver 7 through a bolt, a spherical base is arranged on the connecting plate 803, and the spherical second end of the cross rod 801 is embedded in the spherical base.

Fig. 2 shows a normal working state of the inflatable shield tail 1 sealing device of the embodiment, the linear actuator 7, the connecting rod 8 and the two airbags 9 are sequentially connected, the two airbags 9 are all located in a gap between the shield tail 1 and the duct piece 3, and the airbags 9 are inflated by the gas pipeline 104 of the shield tail 1 to expand, so as to seal the gap between the shield tail 1 and the duct piece 3. After a certain time of use, the air bag 9 inevitably generates abrasion and needs to be replaced, and the specific replacement steps are as follows:

(1) as shown in fig. 5, the telescopic rod of the linear driver 7 extends outwards to push the outermost air bag 9 out of the gap between the shield tail 1 and the duct piece 3, and the outermost air bag 9 enters slurry;

(2) as shown in fig. 6, the bolts connecting the connecting plate 803 and the telescopic rods are disassembled, so that the whole connecting rod 8 is disassembled, and then the telescopic rods of the linear drivers 7 are retracted; meanwhile, since the connecting piece 903 of the outermost airbag 9 is separated from the groove 103 of the shield tail 1, after the limit of the groove 103 is lost, the connecting piece 903 of the outermost airbag 9 is easily dislocated under the influence of external forces such as scouring of slurry and vibration of equipment, is unhooked from the connecting piece 903 of the adjacent airbag 9, and is abandoned in the slurry 5;

(3) as shown in fig. 7, a new airbag 9 is inserted into the gap between the shield tail 1 and the segment 3, and the connecting pieces 903 are hooked again;

(4) inflating a new air bag 9 by using the gas pipeline 104 of the shield tail 1 and reinstalling the connecting rod 8; the replacement of the airbag 9 is completed.

The above-mentioned operation of changing gasbag 9 is whole to be accomplished in 1 inside of shield tail, and whole journey need not additionally to remove shield tail 1 or dismantle section of jurisdiction 3, and not only operating procedure is simple, labour saving and time saving, can ensure moreover that there is at least one gasbag 9 all the time to be in operating condition, stops inside mud infiltration shield tail 1 in the operation of changing gasbag 9, avoids influencing the operating efficiency of shield structure machine.

Although the embodiments of the present invention have been described in the specification, these embodiments are only for the purpose of presentation and should not be construed as limiting the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an inflatable shield tail sealing device which characterized in that: comprises a shield tail (1), a linear driver (7), a connecting rod (8) and at least two air bags (9);

the air bag (9) comprises an air bag body (901), an air nozzle (902) and a connecting piece (903), wherein the air bag body (901) is annular, one end of the air nozzle (902) is inserted into the air bag body (901), the other end of the air nozzle (902) is inserted into the connecting piece (903), and two ends of the connecting piece (903) are provided with a tenon and a mortise which can be mutually occluded;

the inner wall of the shield tail (1) is provided with a groove (103) along the axial direction, all the air bags (9) are sleeved on the duct piece (3), the connecting pieces (903) of the adjacent air bags (9) are mutually meshed, and the connecting pieces (903) are embedded into the groove (103) of the shield tail (1); a gas pipeline (104) and a slurry pipeline (102) are arranged in the shield tail (1), an exhaust port of the gas pipeline (104) is connected with an air nozzle (902) in the groove (103), and a sludge discharge port of the slurry pipeline (102) is positioned at the tail end of the shield tail;

the inner wall of the shield tail (1) is provided with the linear driver (7), one end of the connecting rod (8) is connected with the telescopic rod of the linear driver (7), and the other end of the connecting rod is embedded into the mortise of the connecting piece (903) of the air bag (9).

2. The inflatable shield tail seal device of claim 1, wherein: a first spring (904) is sleeved on the air tap (902), and the first spring (904) is located inside the air bag body (901).

3. The inflatable shield tail seal device of claim 2, wherein: the number of the air nozzles (902) is multiple, and the air nozzles (902) are uniformly distributed around the central axis of the air bag body (901).

4. The inflatable shield tail seal device of claim 1, wherein: the connecting rod (8) comprises a cross rod (801) and a vertical rod (802), the first end of the cross rod (801) is connected with the middle of the vertical rod (802) to form a T-shaped structure, and the second end of the cross rod (801) is connected with a telescopic rod of the linear driver (7); the third end of the vertical rod (802) is embedded into the mortise.

5. The inflatable shield tail seal device of claim 4, wherein: the fourth end of the vertical rod (802) is sleeved with a second spring (804), and the tail end of the second spring (804) props against the pipe piece (3).

6. The inflatable shield tail seal device of claim 5, wherein: the connecting rod (8) further comprises a connecting plate (803), the connecting plate (803) is connected with a telescopic rod of the linear driver (7) through a bolt, a spherical base is arranged on the connecting plate (803), the second end of the cross rod (801) is spherical, and the second end of the cross rod (801) is embedded into the spherical base.

7. The inflatable shield tail seal device of claim 1, wherein: the surface of connecting piece (903) is provided with the ring channel, installs rubber gasket (905) in the ring channel, and rubber gasket (905) and air cock (902) laminating.

8. The inflatable shield tail seal device of claim 1, wherein: the linear actuator (7) is a hydraulic cylinder.