Deslagging device for tunnel shield construction

Abstract

The utility model provides a deslagging device for tunnel shield construction, which comprises a shell arranged in a shield tunneling machine main body, a pressure-bearing table used for bearing slag blocks is arranged in the shell, and a movable seat is arranged in the shell above the pressure-bearing table. A pressing plate and a pushing plate are located at the bottom of the moving base and located at the front end and the rear end in the muck block conveying direction correspondingly. A feeding hole used for conveying muck blocks to the top of the pressure bearing table is formed in one side of the shell, a conveying pipeline used for conveying the crushed muck blocks is arranged on the other opposite side of the shell, and an action mechanism is arranged in the shell and used for guiding the moving base to move downwards to be close to the moving base and then guiding the moving base to move horizontally to be close to the conveying pipeline. According to the shield tunneling machine, the shell, the pressure bearing table, the movable base, the pressing plate, the pushing plate and the action mechanism are additionally arranged on the front side of the input end of the conveying pipeline in the shield tunneling machine body, crushing and pushing operation can be conducted in sequence before muck blocks enter the conveying pipeline, convenience and high efficiency are achieved, and the situation that the pipeline is blocked or damaged is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel shield construction slag discharge technical field, concretely relates to a kind of slag discharge devices for tunnel shield construction. BACKGROUND

[0002] The statements herein provide background only for the utility model and do not necessarily constitute the prior art.

[0003] A shield machine is a tunnel boring machine using shield method, and the shield construction method is to build and lay tunnel while tunneling, which is different from open construction method.The shield machine is mainly used for tunnel link of railway, highway, subway and water conservancy and other infrastructure projects.

[0004] However, the pipeline of the existing shield machine only uses the transmission pipeline to guide and discharge the slag blocks when discharging slag, and is prone to be stuck in the pipe when transporting larger slag stones, which can easily block and damage the transmission pipeline for discharging slag.

[0005] To solve the above problems, a slag discharge device for tunnel shield construction is needed to overcome the above problems. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a slag discharge device for tunnel shield construction, which can pre-crush the soil slag blocks before transmission and quickly push them to the input end of the transmission pipeline.

[0007] To achieve the above purpose, the technical scheme of the utility model is as follows: a slag discharge device for tunnel shield construction, comprising a shell arranged in the main body of the shield machine,

[0008] A pressure bearing table for bearing slag blocks is arranged in the shell, a moving seat is arranged above the pressure bearing table, and a pressure plate and a push plate are arranged at the front end and the rear end of the moving seat bottom in the transmission direction of the slag blocks,

[0009] The shell has a feed hole on one side for feeding slag blocks to the top of the pressure bearing table, and the opposite side of the shell is provided with a transmission pipeline for transmitting crushed slag blocks,

[0010] An action mechanism is arranged in the shell, which is used to first guide the moving seat to move down and approach the pressure bearing table, so that the pressure plate crushes the slag blocks on the top of the pressure bearing table, and then guide the moving seat to translate and approach the transmission pipeline, so that the push plate pushes the crushed slag blocks to the input end of the transmission pipeline.

[0011] Further, the action mechanism comprises a limiting groove fixed in the shell and in an L-shaped structure, the limiting groove has a vertical segment and a horizontal segment in communication with each other, a first limiting rod axially perpendicular to the shield machine body is slidably inserted in the limiting groove, a first connecting rod parallel to the vertical segment is rotatably sleeved on the outer wall of the first limiting rod, and the bottom of the first connecting rod is synchronously connected with the top of the moving seat.

[0012] Wherein, by guiding the first limiting rod to move from the top end of the vertical segment to the end of the horizontal segment away from the vertical segment, the moving seat first moves downward towards the top of the pressure bearing table, and then translates towards the direction of the transmission pipeline.

[0013] Further, the top of the vertical segment is fixed on the inner top wall of the shell, and the bottom of the vertical segment is in communication with one end of the horizontal segment.

[0014] Further, the shell is internally provided with a driving gear and a transmission gear in cooperation with each other, a second telescopic rod is fixed on the wheel shaft of the transmission gear in a radial direction, and one end of the second telescopic rod is fixed on the outer wall of the first limiting rod.

[0015] Further, the inner top wall of the shell is fixed with an equipment box, a driving motor is installed in the equipment box, the output shaft of the driving motor is connected with the driving gear, and the wheel shaft of the transmission gear is inserted on the outer wall of the equipment box.

[0016] Further, a winding hole is formed on the outer wall of the equipment box, the wheel shaft of the transmission gear is inserted in the winding hole, a winding spring is sleeved on the outer side of the wheel shaft of the transmission gear, and the two ends of the winding spring are respectively connected with the hole wall of the winding hole and the outer wall of the wheel shaft of the transmission gear.

[0017] The driving gear is a gear with missing teeth, and the transmission gear is a full-tooth gear.

[0018] Further, the first cylinder is inserted into the top of the moving seat, the second connecting rod is concentrically inserted into the top of the first cylinder, the outer wall of the second connecting rod is provided with a protrusion, the first groove in the shape of a spiral line is axially formed in the inner side of the first cylinder and is in sliding and clamping cooperation with the protrusion, the first connecting rod is fixed at the bottom of the second connecting rod, the first bevel gear is fixed at the bottom of the first cylinder which is inserted into the moving seat, the second cylinder which is axially parallel to the main body of the shield tunneling machine is rotatably inserted into the moving seat, the second bevel gear which is in cooperation with the first bevel gear is arranged at one end of the second cylinder, the third connecting rod is threadedly inserted into the other end of the second cylinder, the piston is fixed at one end of the third connecting rod, the second groove which is parallel to the first limiting rod is formed in the bottom of the moving seat, the elastic layer is arranged on the opening of the second groove, the pressure area is formed between the second groove and the elastic layer, the plug groove is formed in the moving seat, the pressure medium is accommodated in the plug groove, the bottom of the plug groove is communicated with the second groove, and the top of the plug groove is bent towards the direction of the piston so as to be in cooperation with the piston.

[0019] Further, when the first limiting rod moves to the bottom of the vertical section, the bottom of the push plate is relatively protruded from the bottom surface of the pressing plate.

[0020] Further, the top of the moving seat is relatively provided with two base blocks, the second limiting rod which is axially parallel to the main body of the shield tunneling machine is fixed between the two base blocks, the supporting arm is fixed to the inner side wall of the shell, the first telescopic rod is vertically fixed to the bottom of the supporting arm, and the bottom of the first telescopic rod is slidingly sleeved on the outer side of the second limiting rod.

[0021] Further, the input end of the feeding hole is communicated with the output end of the soil discharge hole of the shield tunneling machine head, and the inner hole wall of the feeding hole has the downward inclined first slope; the side of the pressure bearing table close to the conveying pipeline has the downward inclined second slope.

[0022] The beneficial effects of the utility model lie in:

[0023] The tunnel shield construction slag discharging device can crush and push the slag before the slag enters the conveying pipeline, is convenient and efficient, and avoids the pipeline jamming or damage.

[0024] The utility model tunnel shield construction uses the slag discharge device, through setting up first cylinder, second cylinder, lug, elastic layer etc., when the pressing plate carries out the crushing operation to the slag block on the bearing platform top, especially when the first limit rod moves from the vertical section top to the vertical section bottom, can utilize the pressing plate down pressure received from the slag block's counterforce, force elastic layer to expand deformation to form the push plate, at this moment push plate bottom can be opposite protruding pressing plate bottom surface, ensure that push plate can make its bottom adhere bearing platform top surface when translating, and then can effectively push the slag broken block on the bearing platform top to the transmission pipeline, stable and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0025] In the drawings:

[0026] Figure 1 The utility model provides the cross section structure diagram (first limit rod is located the top of limit groove vertical section at this time) of the slag discharge device in shield machine main part;

[0027] Figure 2 For Figure 1 Cross section structure schematic diagram (first limit rod is located the bottom of limit groove vertical section at this time) of the slag discharge device in another state;

[0028] Figure 3 For Figure 1 Cross section structure schematic diagram (first limit rod is located the end of limit groove horizontal section far away from shield machine head at this time) of the slag discharge device in still another state;

[0029] Figure 4 For Figure 1 Structure schematic diagram of limit groove;

[0030] Figure 5 For Figure 1 Enlarged structure schematic diagram of A;

[0031] Figure 6 For Figure 2 Enlarged structure schematic diagram of B;

[0032] Figure 7 For Figure 1 Cross section structure schematic diagram (second connecting rod does not move axially relative to first cylinder at this time) of first cylinder;

[0033] Figure 8 For Figure 7 Structure schematic diagram of first cylinder after unfolding first recess groove body distribution state;

[0034] Figure 9 For Figure 1 Local structure schematic diagram of moving seat from the bottom, removes elastic layer.

[0035] BRIEF DESCRIPTION OF DRAWINGS:

[0036] 1, shield machine main body; 2, shield machine head; 3, transmission pipeline; 4, shell; 5, feed hole; 6, pressure platform; 7, moving seat; 8, pressing plate; 9, limiting groove; 901, vertical section; 902, horizontal section; 10, first limiting rod; 11, first connecting rod; 12, second connecting rod; 13, first cylinder; 14, first groove; 15, protrusion; 16, first bevel gear; 17, second cylinder; 18, second bevel gear; 19, plug groove; 20, piston; 21, third connecting rod; 22, second groove; 23, elastic layer; 24, first telescopic rod; 25, second limiting rod; 26, equipment box; 27, drive gear; 28, transmission gear; 29, second telescopic rod; 30, support arm. DETAILED DESCRIPTION

[0037] The embodiments described are obviously only a part of the embodiments of the utility model, and not all the embodiments. The embodiments in the application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.

[0038] Reference Figures 1 to 9 .

[0039] The utility model discloses a tunnel shield construction is with discharging device, including the shell 4 of setting in the shield machine main body 1 inside, the pressure platform 6 for bearing the cinder soil block is set up in the shell 4, the mobile seat 7 is set up in the shell 4 above the pressure platform 6, and the pressing plate 8 and the push plate are set up respectively at the front end and rear end of the mobile seat 7 bottom and in the cinder soil block transmission direction,

[0040] The shell 4 one side has the feed hole 5 for conveying cinder soil block to the top of pressure platform 6, and the transmission pipeline 3 for transmitting the cinder soil block after crushing is set up to the other side of shell 4,

[0041] The shell is provided with action mechanism, and the action mechanism is used to guide the mobile seat 7 to descend and approach the pressure platform 6 first, makes the pressing plate 8 crush the cinder soil block on the top of pressure platform 6, then guides the mobile seat 7 to translate and approach the transmission pipeline 3, and the push plate pushes the crushed cinder soil block to the input end of transmission pipeline 3.

[0042] In the embodiment, by means of the original structure of the shield machine body 1 and the shield machine head 2, when the shield machine head 2 is working, the soil and rock formed by the excavated soil will be transported to the top of the pressure bearing table 6 in the shell 4 through the soil discharge hole and the feeding hole 5. At this time, the action mechanism will first guide the moving seat 7 to drive the pressing plate to move downward to crush the soil block, and then guide the moving seat 7 to translate towards the transmission pipeline 3 to push the crushed soil block to the transmission pipeline 3 for discharge transmission work.

[0043] The shell, moving seat, pressing plate, pushing plate, action mechanism and the like arranged at the front side of the input end of the transmission pipeline 3 break the original idea, can crush the large volume of soil block before discharging the soil block from the transmission pipeline 3, avoid the blockage of the transmission pipeline 3 during subsequent discharge transmission, and can continue to push the crushed soil block directly to the input end of the transmission pipeline 3 after the crushing work of the pressing plate on the soil block is completed, thereby improving the work efficiency of the discharge.

[0044] It should be pointed out that the transmission pipeline 3 is internally installed in an auger, and the auger is driven to rotate by a corresponding driving device to discharge and transmit the crushed soil block in the shell 4. Since the auger transmission material belongs to the prior art in the field, the present application will not be described in detail.

[0045] In an embodiment, the action mechanism includes a limiting groove 9 fixed in the shell 4 and having an L-shaped structure, the limiting groove 9 has a vertical segment 901 and a horizontal segment 902 which are in communication with each other, a first limiting rod 10 which is perpendicular to the axial direction of the shield machine body 1 is horizontally slidably inserted into the limiting groove 9, a first connecting rod 11 which is parallel to the vertical segment 901 is rotatably sleeved on the outer wall of the first limiting rod 10, and the bottom of the first connecting rod 11 is synchronously connected with the top of the moving seat 7.

[0046] The top of the first connecting rod 11 is fixed with a connecting ring (not marked), and the connecting ring is rotatably sleeved on the outer side of the first limiting rod 10.

[0047] In the embodiment, by guiding the first limiting rod 10 to move from the top end of the vertical segment 901 to the end of the horizontal segment 902 away from the vertical segment 901, the moving seat 7 is first moved downward towards the top of the pressure bearing table 6, and then translated towards the transmission pipeline 3 to complete the crushing and pushing work of the soil block on the top of the pressure bearing table 6 in sequence, which is convenient and efficient.

[0048] Preferably, the top of the vertical segment 901 is fixed to the inner top wall of the shell 4, the bottom of the vertical segment 901 is in communication with one end of the horizontal segment 902, and the vertical segment 901 is located on the side close to the shield machine head 2 compared with the horizontal segment 902.

[0049] The housing 4 is internally provided with a driving gear 27 and a transmission gear 28 which cooperate with each other, and a second telescopic rod 29 is fixed on the wheel shaft of the transmission gear 28 in a radial manner, and one end of the second telescopic rod 29 is fixed on the outer wall of the first limiting rod 10.

[0050] In the embodiment, the driving gear 27 drives the transmission gear 28 to rotate, and the transmission gear 28 drives the first limiting rod 10 to rotate synchronously through the second telescopic rod 29, and under the combined limiting action of the telescopic function of the second telescopic rod 29 and the limiting groove 9, the first limiting rod 10 drives the moving seat 7 to first move downward towards the top of the pressure bearing table 6, and then translate towards the transmission pipeline 3.

[0051] The inner top wall of the housing 4 is fixed with an equipment box 26, and a driving motor (not shown in the figure) is installed in the equipment box 26, the output shaft of the driving motor is connected with the driving gear 27, and the wheel shaft of the transmission gear 28 is inserted on the outer wall of the equipment box 26.

[0052] The driving motor of the embodiment can adopt a speed reducer. The rotation of the driving gear 27 can be realized by driving the output shaft of the driving motor.

[0053] In an embodiment, a winding hole (not shown in the figure) is formed on the outer wall of the equipment box 26, the wheel shaft of the driving gear 27 is inserted in the winding hole, a winding spring (not shown in the figure) is sleeved on the outer side of the wheel shaft of the transmission gear 28, the two ends of the winding spring are respectively connected with the hole wall of the winding hole and the outer wall of the wheel shaft of the transmission gear 28, the driving gear 27 is a gear with missing teeth, and the transmission gear 28 is a full-tooth gear.

[0054] It should be noted that when the moving seat 7 is not moved downward, that is, the first limiting rod 10 is located at the top of the vertical section 901, at this time the winding spring is in the initial non-deformation state, and when the moving seat 7 is moved downward, that is, the first limiting rod 10 moves from the top of the vertical section 901 to the bottom of the vertical section 901, the winding spring is in the compressed deformation state.

[0055] In the specific implementation, when the top of the pressure bearing table 6 carries a slag block, the output shaft of the driving motor drives the driving gear 27 to rotate. When the toothed part of the driving gear 27 rotates to engage with the transmission gear 28, the transmission gear 28 can be driven to rotate, and the rotation of the transmission gear 28 can realize that the moving seat 7 first moves downward to the pressure bearing table 6 to make the pressure plate 8 crush the slag block, and then the moving seat 7 translates to the transmission pipeline 3 to make the push plate push the slag block to the transmission pipeline 3, and the winding spring is compressed and deformed in this process.

[0056] When the toothed part of the driving gear 27 rotates to disengage from the transmission gear 28, the elastic force of the winding spring is released to drive the transmission gear 28 to rotate reversely to the initial position, and then the moving seat 7 reversely returns to the initial position, so as to carry out the next crushing and transmission operation.

[0057] Thus, with the continuous driving of the driving motor output shaft, continuous crushing and conveying operations can be performed on the muck blocks conveyed to the top of the pressure table 6, which is convenient and efficient.

[0058] Further, to ensure that the push plate can effectively push the crushed muck blocks, the push plate is designed to be expandable and deformed, so that after crushing the muck blocks, the bottom of the push plate can protrude relative to the bottom surface of the pressing plate 8, ensuring that the bottom of the push plate can tightly contact the top surface of the pressure table 6 during translation, thereby effectively pushing the muck blocks on the top of the pressure table 6.

[0059] Specifically, the first cylinder 13 is inserted at the top of the moving seat 7, the second connecting rod 12 is concentrically inserted at the top of the first cylinder 13, the protrusion 15 is arranged on the outer wall of the second connecting rod 12, the first groove 14 in the shape of a spiral line is axially arranged in the inner side of the first cylinder 13 and slidably connected with the protrusion 15, the first connecting rod 11 is fixed at the bottom of the second connecting rod 12, the first bevel gear 16 is arranged at the bottom of the first cylinder 13 and extends into the moving seat 7, the second cylinder 17 axially parallel to the shield machine body 1 is rotatably arranged in the moving seat 7, the second bevel gear 18 is arranged at one end of the second cylinder 17 and matched with the first bevel gear 16, the third connecting rod 21 is threadedly arranged at the other end of the second cylinder 17, the piston 20 is fixed at one end of the third connecting rod 21, the second groove 22 parallel to the first limiting rod 10 is arranged at the bottom of the moving seat 7, and the elastic layer 23 is arranged at the opening of the second groove 22. The pressure area is formed between the inner wall of the second groove 22 and the elastic layer 23.

[0060] The plug groove 19 is arranged in the moving seat 7 and contains the pressure medium. The bottom of the plug groove 19 is communicated with the second groove 22, and the top of the plug groove 19 is bent towards the direction of the piston 20 to be matched with the piston 20.

[0061] The piston 20 extrudes the pressure medium in the plug groove 19 to force the elastic layer 23 to expand and deform to form the push plate.

[0062] When the first limiting rod 10 moves to the bottom of the vertical section 901, the bottom of the push plate protrudes relative to the bottom surface of the pressing plate 8.

[0063] Preferably, the elastic layer 23 can be a rubber layer, and the pressure medium can be hydraulic oil.

[0064] It should be noted that the piston 20 extrudes the pressure medium in the plug groove 19 to increase the pressure of the pressure area, forcing the elastic layer 23 to expand and deform to form the push plate, at this time, the bottom of the push plate protrudes relative to the bottom surface of the pressing plate 8, so that the bottom of the push plate contacts the top of the pressure table 6. When the piston 20 does not extrude the pressure medium in the plug groove 19, the elastic layer 23 is in a contracted state, and at this time, the bottom of the elastic layer 23 is lower than the bottom surface of the pressing plate 8, avoiding interference with the crushing operation of the pressing plate 8 on the muck blocks.

[0065] In the embodiments, the elastic layer 23 can also be a piston block, which is arranged in the second groove 22 in a sliding manner and is in sealing cooperation with the second groove 22.

[0066] In the specific implementation, in the process of the downward movement of the moving seat 7 and the crushing of the slag block by the pressing plate 8, the pressing plate 8 is subjected to the upward reaction force from the slag block, and the first connecting rod 11 drives the second connecting rod 12 to axially extend into the first cylinder 13, so that the protruding block 15 frictionally extrudes the wall of the first groove 14 in the axial spiral line, the first cylinder 13 is forced to rotate, the first bevel gear 16, the second bevel gear 18 and the second cylinder 17 are forced to rotate, the second cylinder 17 is forced to threadedly cooperate with the third connecting rod 21, the piston 20 is driven to extrude the pressure medium in the plug groove 19, the pressure of the pressure area is increased, and the elastic layer 23 is forced to expand and deform to form the push plate. When the first limiting rod 10 moves to the bottom of the vertical section 901, the bottom of the push plate protrudes from the bottom surface of the pressing plate 8 and is in contact with the top of the pressure bearing table 6. When the first limiting rod 10 moves in the horizontal section 902 to the direction of the transmission pipeline 3, the push plate pushes the slag block to the output end of the transmission pipeline 3 for subsequent slag discharge.

[0067] In an embodiment, the top of the moving seat 7 is fixedly provided with two base blocks, the second limiting rod 25 axially parallel to the shield machine body 1 is fixed between the two base blocks, the support arm 30 is fixed to the inner side wall of the shell 4, the first telescopic rod 24 is vertically fixed to the bottom of the support arm 30, and the bottom of the first telescopic rod 24 is slidably sleeved on the outer side of the second limiting rod 25.

[0068] In the embodiment, the telescopic action of the first telescopic rod 24 can realize the stability of the vertical movement of the moving seat 7, and the second limiting rod 25 can realize the stability of the horizontal movement of the moving seat 7.

[0069] In an embodiment, the input end of the feeding hole 5 is in communication with the output end of the earth discharge hole of the shield machine head 2, and the inner side hole wall of the feeding hole 5 has a downwardly inclined first slope (not indicated), which can facilitate the rapid conveying of the slag block input by the earth discharge hole to the top of the pressure bearing table 6. The side of the pressure bearing table 6 close to the transmission pipeline 3 has a downwardly inclined second slope (not indicated), which can cooperate with the push plate to rapidly guide the slag block to the transmission pipeline 3 for subsequent slag discharge and transmission.

[0070] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0071] It should be noted that if the utility model embodiments involve directional indications (such as up and down), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0072] In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B scheme. In addition, if the utility model embodiments involve "first", "second", etc. description, the "first", "second", etc. description is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "multiple" means more than two. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the utility model.

Claims

1. A muck removal device for tunnel shield construction, characterized in that, The shell (4) is arranged inside the shield machine body (1), the pressure bearing table (6) for bearing the muck block is arranged in the shell (4), the moving seat (7) is arranged above the pressure bearing table (6), the pressing plate (8) and the pushing plate are arranged at the front end and the rear end of the moving seat (7) bottom and in the muck block transmission direction respectively, the feeding hole (5) for feeding the muck block to the top of the pressure bearing table (6) is arranged on one side of the shell (4), and the transmission pipeline (3) for transmitting the crushed muck block is arranged on the opposite side of the shell (4), The action mechanism is arranged in the shell (4) and is used for guiding the moving seat (7) to move downwards to be close to the pressure bearing table (6) first, crushing the muck block on the top of the pressure bearing table (6) by the pressing plate (8), and then guiding the moving seat (7) to move to be close to the transmission pipeline (3), so that the pushing plate pushes the crushed muck block to the input end of the transmission pipeline (3).

2. The device according to claim 1, characterized in that: The action mechanism comprises a limiting groove (9) fixed in the shell (4) and in an L-shaped structure, the limiting groove (9) has a vertical section (901) and a horizontal section (902) in communication with each other, a first limiting rod (10) axially perpendicular to the shield machine body (1) is horizontally slidably inserted into the limiting groove (9), a first connecting rod (11) parallel to the vertical section (901) is rotatably sleeved on the outer wall of the first limiting rod (10), and the bottom of the first connecting rod (11) is synchronously connected with the top of the moving seat (7). The first limiting rod (10) is guided to move from the top end of the vertical section (901) to the end of the horizontal section (902) away from the vertical section (901), so that the moving seat (7) moves downwards to be close to the top of the pressure bearing table (6) first, and then moves to be close to the transmission pipeline (3).

3. The device according to claim 2, characterized in that: The top of the vertical section (901) is fixed to the inner top wall of the shell (4), and the bottom of the vertical section (901) is in communication with one end of the horizontal section (902).

4. The device according to claim 2, characterized in that: The shell (4) is internally provided with a driving gear (27) and a transmission gear (28) matched with each other, a second telescopic rod (29) is fixed on the wheel shaft of the transmission gear (28) in a radial direction, and one end of the second telescopic rod (29) is fixed on the outer wall of the first limiting rod (10).

5. The device according to claim 4, characterized in that: The inner top wall of the shell (4) is fixed with an equipment box (26), a driving motor is installed in the equipment box (26), the output shaft of the driving motor is connected with the driving gear (27), and the wheel shaft of the transmission gear (28) is inserted into the outer wall of the equipment box (26).

6. The device according to claim 4, characterized in that: The outer wall of the equipment box (26) is provided with a winding hole, the wheel shaft of the transmission gear (28) is inserted into the winding hole, a winding spring is sleeved on the outer side of the wheel shaft of the transmission gear (28), and the two ends of the winding spring are connected with the hole wall of the winding hole and the outer wall of the wheel shaft of the transmission gear (28) respectively. The driving gear (27) is a gear with missing teeth, and the transmission gear (28) is a full-tooth gear.

7. The device according to claim 6, characterized in that: The first cylinder (13) is arranged on the top of the moving seat (7), the second connecting rod (12) is arranged on the top of the first cylinder (13) in a concentric manner, the protrusion (15) is arranged on the outer wall of the second connecting rod (12), the first groove (14) in the shape of a spiral line is arranged on the inner side of the first cylinder (13) in an axial direction and is in sliding and clamping connection with the protrusion (15), the second connecting rod (12) is fixed on the bottom of the first connecting rod (11), the first bevel gear (16) is arranged on the bottom of the first cylinder (13) and extends into the moving seat (7), the second cylinder (17) is arranged in the moving seat (7) in a rotating manner and is parallel to the main body (1) of the shield tunneling machine in an axial direction, the second bevel gear (18) is arranged on one end of the second cylinder (17) and is in connection with the first bevel gear (16), the third connecting rod (21) is arranged on the other end of the second cylinder (17) in a threaded manner, the piston (20) is arranged on one end of the third connecting rod (21), the second groove (22) parallel to the first limiting rod (10) is arranged on the bottom of the moving seat (7), the elastic layer (23) is arranged on the groove of the second groove (22) in a covering manner, the pressure area is formed between the second groove (22) and the elastic layer (23), the plug groove (19) is arranged in the moving seat (7), the pressure medium is contained in the plug groove (19), the bottom of the plug groove (19) is in communication with the second groove (22), the top of the plug groove (19) is bent towards the piston (20) and is in connection with the piston (20), the piston (20) extrudes the pressure medium in the plug groove (19) to force the elastic layer (23) to expand and deform to form the push plate.

8. The device according to claim 7, characterized in that: When the first limiting rod (10) moves to the bottom of the vertical section (901), the bottom of the push plate protrudes from the bottom surface of the pressing plate (8).

9. The device according to claim 1, characterized in that: The two base blocks are arranged on the top of the moving seat (7) in a relative manner, the second limiting rod (25) parallel to the main body (1) of the shield tunneling machine in an axial direction is arranged between the two base blocks, the support arm (30) is fixed on the inner side wall of the shell (4), the first telescopic rod (24) is vertically fixed on the bottom of the support arm (30), and the bottom of the first telescopic rod (24) is in sliding sleeve connection with the outer side of the second limiting rod (25).

10. The device according to claim 1, characterized in that: The input end of the feeding hole (5) is in communication with the output end of the soil discharge hole of the shield tunneling machine head (2), and the inner hole wall of the feeding hole (5) has a downward inclined first slope; the side of the pressure bearing table (6) close to the transmission pipeline (3) has a downward inclined second slope.

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