Excavation supporting device for municipal water supply and drainage pipeline groove

Abstract

The invention relates to the technical field of trench excavation, and discloses an excavation supporting device for municipal water supply and drainage pipeline trenches, which comprises a digging support arranged in the trench, the digging support is provided with a spiral digging part and a bulldozing part which are used for digging forward, and the digging support comprises a tail half ring; earth ramming plates which turn over towards the inner wall of the groove and ramming the side wall of the groove are symmetrically arranged at the two ends of the tail half ring, and a transposition driving piece for pushing soil to move to the side wall of the groove is further arranged on the digging support. The earth ramming plates for ramming the side walls of the grooves are symmetrically and rotationally arranged on the earth digging support, the overturning driving parts for pushing the earth ramming plates to rotate are arranged on the side walls of the earth pushing part, the overturning driving parts are used for driving the earth ramming plates to rotate, earth conveyed by the position changing driving parts is rammed and compacted, and the originally loose side walls of the grooves are filled with earth and tamped; therefore, the side wall of the groove is stabilized, collapse of the groove is avoided, and meanwhile the construction width of the groove located on the ground is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of trench excavation, and in particular to an excavation support device for a municipal water supply and drainage pipeline trench. Background Art

[0002] At present, when constructing municipal water supply and drainage pipelines, it is necessary to dig trenches in advance before installing water supply and drainage pipes, and then place various types of water supply and drainage pipes. In order to ensure the structural stability of the trenches, it is necessary to install brackets in them to support the excavated trenches. The common brackets for pipeline trenches only play a role in preventing collapse. Operators assemble the brackets into appropriate sizes according to the different depth specifications of the trenches, and then place them in the trenches. However, there are usually the following problems in actual use:

[0003] First, during the installation process, since the diameter of the pipeline is non-standard, there is a problem of different sizes of pipeline diameters, which will result in the width of the surface trench being limited during the placement process. That is, the width of the trench dug on the surface in some areas should not be too wide. If it is too wide, it will affect the surface traffic in the area. However, if the width of the trench is shortened and the depth of the trench needs to be deepened, it is very easy for the trench to collapse, and then the predetermined pipeline burial depth cannot be reached;

[0004] Secondly, as the trench continues to deepen, soil is constantly dug out and then taken away. At the same time, the side walls of the trench need to be continuously supported to prevent collapse. However, if the support is not firm, the soil on the side walls will collapse to the bottom, making it impossible to dig the trench normally.

[0005] For this purpose, we designed an excavation support device for municipal water supply and drainage pipeline trenches. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that if the support is not firm, the soil from the side wall will collapse to the bottom, which will make it impossible to dig the trench normally. An excavation support device for municipal water supply and drainage pipeline trenches is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A digging support device for municipal water supply and drainage pipeline trenches, the digging support is provided with a spiral digging part and a bulldozer part for digging forward, the digging support includes a tail semi-ring, and ramming plates are symmetrically arranged at both ends of the tail semi-ring for flipping toward the inner wall of the trench and tamping the side walls of the trench. The digging support is also provided with a displacement driving member for pushing the soil to shift to the side walls of the trench, and the side walls of the bulldozer are provided with a flipping driving member for pushing the ramming plate to rotate. A plurality of support plates are symmetrically extruded on the side walls of the trench, and a support frame is installed between two relatively opposite support plates. A propulsion mechanism is provided above the bulldozer for pushing the support plate into the ramming plate.

[0009] Preferably, the earthmoving support comprises:

[0010] An end ring and a tail semi-ring, wherein the end ring and the tail semi-ring are coaxially arranged, an end semi-circular sealing plate and a horizontal baffle are fixed to the tail semi-ring by bolts, and a semi-circular intercepting plate is also arranged on the end ring;

[0011] The rammed earth plate rotates on the tail semi-ring through a rotating hinge, and the rammed earth plate is connected to the tail semi-ring through a reset piece, and drives the symmetrically arranged rammed earth plates to rotate towards each other.

[0012] Preferably, the transposition drive member comprises:

[0013] The first driving motor is fixed on the semicircular intercepting plate, and the output end of the first driving motor is connected to the spiral digging part. The outer side wall of the tail semi-ring is symmetrically provided with an excavation groove, and the excavation groove is provided with an excavation hole connected with the end ring.

[0014] Preferably, the bulldozer section comprises:

[0015] A vertical push plate is fixed on the outer side wall of the end ring, one side of the vertical push plate is symmetrically provided with an inclined push surface inclined upward, and the other side of the vertical push plate is a vertical plane, and one side of the rammed earth plate is closely attached to the vertical plane of the vertical push plate.

[0016] Preferably, the flip driving member comprises:

[0017] A lifting plate, the lifting plate slides up and down on the side wall of the bulldozer, and two sides of the lifting plate abut against the ramming plate;

[0018] The second drive motor is installed on the vertical push plate through a rod groove, a screw rod is fixed on the output end of the second drive motor, and a mounting plate is adapted on the screw rod, and the mounting plate is connected to the lifting plate.

[0019] Preferably, the propulsion mechanism comprises:

[0020] The board placing box body has a plurality of support plates symmetrically placed in the board placing box body, the bottom of the board placing box body is symmetrically provided with drop holes, and a push-off portion for pushing the support plates out of the drop holes is provided in the board placing box body.

[0021] Preferably, the push-off portion comprises:

[0022] A baffle frame and a push plate, wherein a plurality of support plates are arranged between the baffle frame and the push plate, a movable cavity is opened at the bottom of the plate placing box body, and a vertical plate is movable in the movable cavity, and a horizontal baffle for blocking the drop hole is arranged on the top of the vertical plate;

[0023] The vertical plate is reset and retracted in the movable cavity by a first reset spring. A limiting metal rod cooperating with the vertical plate is also arranged in the movable cavity. The bottom of the vertical plate extends out of the movable cavity.

[0024] Preferably, the push-off portion further comprises:

[0025] The first electromagnetic generator is provided with a push rod connected to a push plate, and a first magnet block is fixed on the push plate on the side facing the first electromagnetic generator.

[0026] Preferably, the adjacent side walls of the rammed earth plate are provided with interconnected top grooves and side grooves, the adjacent groove walls of the top groove are provided with bottom cavities and side cavities respectively, a bottom plate which is reset and lifted by a second reset spring is arranged in the bottom cavity, a pressing rod is arranged at the bottom of the bottom plate, and a metal contact sheet corresponding to the pressing rod is arranged at the bottom of the bottom cavity;

[0027] A side push plate that pushes a support plate is provided in the side cavity, a second electromagnetic generator is provided in the side cavity, a second magnet block is provided on the side of the side push plate facing the second electromagnetic generator, the side push plate is retracted and extended in the side cavity by a third return spring, and a symmetrically arranged chamfer is provided on the side of the side push plate facing the second electromagnetic generator.

[0028] Preferably, the rammed earth plate is provided with interconnected film inlet holes and film outlet holes, and the vertical push plate is symmetrically provided with film rolls in a wound state. The film rolls are wound and unwound on the vertical push plate through roller brackets, and the film rolls pass through the film inlet holes and film outlet holes.

[0029] The beneficial effects of the present invention are:

[0030] 1. In the present invention, a ramming plate for compacting the side wall of the trench is symmetrically rotated on the earth-moving support, and a turning driving member is provided on the side wall of the bulldozer to push the ramming plate to rotate. The turning driving member is used to drive the ramming plate to rotate, and the soil transported by the displacement driving member is compacted, and the originally loose side wall of the trench is filled and compacted, thereby completing the stabilization of the side wall of the trench, avoiding the collapse of the trench, and reducing the construction width of the trench on the ground.

[0031] 2. The propulsion mechanism in the present invention is used to push the support plate into the rammed earth plate. Then, after the rammed earth plate is swung to compact the soil on the side wall and is in a vertical state, the rammed earth plate is bounced off the rammed earth plate. A support frame is installed between the two relative support plates. The support frame is installed between the two relative support plates through an external mounting device to stabilize the support plate and facilitate the subsequent installation of drainage pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0033] Figure 2 A schematic diagram of the rammed earth state of a rammed earth plate in an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0034] Figure 3 The left and right isometric views of an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0035] Figure 4 This is an isometric view of an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0036] Figure 5 for Figure 4 A schematic diagram of the structure enlargement at the center A;

[0037] Figure 6 A partial exploded view of an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0038] Figure 7 This is a schematic structural diagram of a plate box body in an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0039] Figure 8 This is a schematic diagram of a first state of a plate box body placed in an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0040] Fig. 9 for Figure 8 A schematic diagram of the structure enlarged at B in the middle;

[0041] Fig.10 This is a schematic diagram of a second state of a plate box body placed in an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0042] Fig.11 for Fig.10 A schematic diagram of the structure enlarged at C in the middle;

[0043] Fig.12 A schematic diagram of the internal structure of a rammed earth plate in an excavation support device for a municipal water supply and drainage pipeline trench proposed by the present invention;

[0044] Fig.13 for Fig.12 Enlarged schematic diagram of the structure at D in the middle.

[0045] In the figure: 1, end ring; 2, tail half ring; 3, unearthed groove; 4, unearthed hole; 5, end semicircular sealing plate; 6, horizontal baffle; 7, spiral excavation part; 8, first drive motor; 9, vertical push plate; 10, inclined push surface; 11, lifting plate; 12, second drive motor; 13, screw rod; 14, rod groove; 15, mounting plate; 16, film roll; 17, roller bracket; 18, rammed earth plate; 19, top groove; 20, side groove; 21, film inlet hole; 22, support plate; 23, film outlet hole; 24, board box body; 25. Baffle frame; 26. First electromagnetic generator; 27. Push plate; 28. Push rod; 29. ​​First magnet block; 30. Vertical plate; 31. Horizontal baffle; 32. Movable cavity; 33. Limiting metal rod; 34. First reset spring; 35. Bottom cavity; 36. Side cavity; 37. Bottom plate; 38. Second reset spring; 39. Pressing rod; 40. Metal contact piece; 41. Side push plate; 42. Chamfer; 43. Second magnet block; 44. Second electromagnetic generator; 45. Third reset spring; 46. Support frame. DETAILED DESCRIPTION

[0046] Embodiment 1

[0047] Reference Figure 1-Figure 13 , an excavation support device for municipal water supply and drainage pipeline trenches, including an excavation support arranged in the trench, wherein the excavation support is placed at the bottom of the trench, and an external propulsion device is provided on the excavation support to push the excavation support forward in the trench, thereby driving the excavation support forward and forming a trench, wherein the external propulsion device is a prior art and will not be elaborated on herein.

[0048] The digging support is provided with a spiral digging part 7 and a bulldozer part for digging forward. It should be noted that the spiral digging part 7 and the bulldozer part are used to divide the soil in front of the digging support into two parts, one part of the soil is pushed to both sides by the bulldozer part, and the soil is pushed upward to push this part of the soil away from the groove.

[0049] The digging bracket is also provided with a displacement drive for pushing the soil to the side wall of the trench, while another part of the soil is excavated by the spiral digging part 7 and transported to the side wall of the trench through the displacement drive. The digging bracket includes a tail semi-ring 2, wherein the two ends of the tail semi-ring 2 are symmetrically provided with ramming plates 18 that are flipped toward the inner wall of the trench and compact the side wall of the trench, and the side wall of the bulldozer is provided with a flipping drive for pushing the ramming plate 18 to rotate. The flipping drive is used to drive the ramming plate 18 to rotate, and the soil transported by the displacement drive is compacted, and the originally loose side wall of the trench is filled and compacted, thereby completing the stabilization of the side wall of the trench, avoiding the collapse of the trench, and reducing the construction width of the trench on the ground.

[0050] The working principle of the present invention is as follows:

[0051] The digging support is placed at the bottom of the trench, and an external propulsion device is provided on the digging support to push the digging support forward in the trench, which will drive the digging support forward and form a trench. A part of the soil is excavated by the spiral digging part 7 and transported to the side wall of the trench through the transposition drive. The ramming plate 18 is driven to rotate by the flip drive to tamp the soil transported by the transposition drive, and the originally loose side wall of the trench is filled and compacted, thereby completing the stabilization of the side wall of the trench, avoiding the collapse of the trench, and reducing the construction width of the trench on the ground.

[0052] Embodiment 2

[0053] Reference Figure 3 and Figure 4 In this state, the earth-digging support includes an end ring 1, which is coaxially arranged with a tail half ring 2, wherein the end ring 1 and the tail half ring 2 have the same outer diameter, and earth-digging is performed when the end ring 1 and the tail half ring 2 are pushed forward by an external propulsion device.

[0054] Among them, reference Figure 6 In this state, an end semicircular sealing plate 5 and a horizontal baffle 6 are fixed to the tail semi-ring 2 by bolts, and a semicircular intercepting plate is also provided on the end ring 1, so that the tail semi-ring 2 will be closed into a semicircular space, and a part of the soil will enter the tail semi-ring 2 from the end ring 1 through the transposition drive member to complete the transfer of the soil.

[0055] Embodiment 3

[0056] Reference Figure 3 and Figure 6State, the transposition drive component includes a first drive motor 8, and the output end of the first drive motor 8 is connected to the spiral digging part 7, and the first drive motor 8 is fixed on the semicircular intercepting plate. Therefore, under the driving action of the first drive motor 8, the spiral digging part 7 is driven to rotate. It should be noted that the end of the spiral digging part 7 protrudes from the end ring 1, so under the propulsion action of the external propulsion equipment, the protruding spiral digging part 7 will transport soil into the end ring 1 through spiral rotation, which can not only provide forward space for the propulsion of the end ring 1, but also transport this part of the soil excavated into the end ring 1.

[0057] The outer side wall of the tail semi-ring 2 is symmetrically provided with an unearthed groove 3, and the unearthed groove 3 is provided with an unearthed hole 4 connected with the end ring 1, so that the soil entering the tail semi-ring 2 will be squeezed out from the unearthed hole 4 under the action of the spiral excavation part 7 squeezing the soil and reach the unearthed groove 3. It should be noted that the rammed earth plate 18 here is in a non-vertical state, and a chamfer is provided at the junction of the rammed earth plate 18 and the unearthed groove 3, so that the soil is squeezed out from the junction of the rammed earth plate 18 and the unearthed groove 3 and reaches the groove side wall facing the rammed earth plate 18. On one side, the soil originally located in the end ring 1 is squeezed out through the excavation hole 4 by the rotating spiral excavating part 7, and the overturned ramming plate 18 tamps and hits this part of the soil to compact the soil on the side wall of the groove to prevent the soil from sliding and causing the groove to collapse, so that the side wall of the groove remains in a vertical state. This can effectively reduce the opening area of ​​the groove on the ground, reduce the construction excavation area, shorten the groove width, and stabilize the groove by compacting the side wall of the groove to achieve a predetermined pipeline burial depth.

[0058] It should be noted that the rammed earth plate 18 rotates on the tail semi-ring 2 through a rotating hinge, and the rammed earth plate 18 is connected to the tail semi-ring 2 through a reset member, and drives the symmetrically arranged rammed earth plates 18 to rotate towards each other. Therefore, the two symmetrically arranged rammed earth plates 18 on the tail semi-ring 2 move away from each other under the action of the flip driving member, so that the two rammed earth plates 18 compact the soil on the side walls of the groove. When the flip driving member no longer applies force to the rammed earth plates 18, the rammed earth plates 18 will rotate towards each other and reset under the action of the reset member.

[0059] Furthermore, the reset member adopts a reset spring, one end of which is connected to the rammed earth plate 18 , and the other end is connected to the tail half ring 2 , wherein the reset member is used to perform rotational reset on the rotating rammed earth plate 18 .

[0060] Embodiment 4

[0061] The flip driving member is used to drive the two rammed earth plates 18 to flip back to each other on the tail half ring 2. The flip driving member includes a lifting plate 11. The lifting plate 11 slides up and down on the side wall of the bulldozer, and the two sides of the lifting plate 11 are against the rammed earth plates 18. Figure 8 and Fig.10State, as the lifting plate 11 is lifted, the rammed earth plates 18 on both sides will be pushed back to a vertical state, thereby completing the pushing and compacting of the soil on one side of the rammed earth plate 18;

[0062] The flipping drive component also includes a second drive motor 12, which is installed on the vertical push plate 9 through a rod groove 14. A screw rod 13 is fixed to the output end of the second drive motor 12, and a mounting plate 15 is adapted on the screw rod 13. The mounting plate 15 is connected to the lifting plate 11. Therefore, when the second drive motor 12 is turned on, it can drive the screw rod 13 to rotate forward and reverse, thereby driving the lifting plate 11 to rise and fall.

[0063] Embodiment 5

[0064] Reference Figure 3 State, the bulldozer part includes a vertical push plate 9, the vertical push plate 9 is fixed on the outer wall of the end ring 1, one side of the vertical push plate 9 is symmetrically provided with an inclined push surface 10 inclined upward, and the other side of the vertical push plate 9 is a vertical plane, and one side of the ramming plate 18 is close to the vertical plane of the vertical push plate 9, so that when the vertical push plate 9 is pushed by an external propulsion device, the soil at the front end can be separated and pushed upward away from the groove to complete the excavation of the groove.

[0065] Embodiment 6

[0066] Reference Figure 4 and Figure 5 Status and Fig.12 and Fig.13 The rammed earth plate 18 is provided with a film inlet hole 21 and a film outlet hole 23 which are interconnected. The vertical push plate 9 is symmetrically provided with a film roll 16 in a rolled state. The film roll 16 is rolled and unrolled on the vertical push plate 9 through a roller bracket 17. The film roll 16 passes through the film inlet hole 21 and the film outlet hole 23. The film roll 16 is rolled and unrolled by the roller bracket 17 according to the prior art, which ensures that the film roll 16 is always in a rolled state, that is, the film roll 16 is in a pulled state between the film inlet hole 21 and the film outlet hole 23. Figure 4 and Figure 5 In this state, the support plate 22 in the vertical state squeezes the film roll 16 against the side wall of the groove, so that when the soil enters the side of the rammed earth plate 18, the existence of the film roll 16 forms a circle of blocking for the soil, preventing the soil from Figure 5 The support plate 22 flows out from between the rammed earth plate 18 and the support plate 22. When the rammed earth plate 18 is in a vertical state and the soil is compacted, the support plate 22 located in the rammed earth plate 18 pops out and abuts against the adjacent vertical support plate 22. The propulsion mechanism is used to push the support plate 22 into the rammed earth plate 18. The support frame 46 is installed between the two relative support plates 22 through an external mounting device to stabilize the support plate 22 and facilitate the subsequent installation of the drainage pipe.

[0067] Embodiment 7

[0068] A propulsion mechanism is provided above the bulldozer to push the support plate 22 into the rammed earth plate 18. The propulsion mechanism is used to push the support plate 22 into the rammed earth plate 18. Then, after the rammed earth plate 18 is swung to compact the soil on the side wall and is in a vertical state, the support plate 22 is bounced off the rammed earth plate 18 and abuts against the support plate 22 behind it, thereby forming a Figure 1 In this state, a plurality of support plates 22 symmetrically squeezed by the side walls of the groove will be formed, and a support frame 46 is installed between two relatively support plates 22, wherein the support frame 46 is I-shaped, which is convenient for firm support, and the support frame 46 is through an external installation device, wherein the external installation device is a prior art, which is a hydraulic transmission device and a clamping device, the hydraulic transmission device is used to transport the clamping device between the two support plates 22, and the clamping device is clamped with a support frame 46, which is used to deliver the support frame 46 to be installed between the relatively two support plates 22, and to stabilize the support plates 22, so as to facilitate the subsequent installation of drainage pipes, wherein the external propulsion device stops running, and the flip drive is turned on to drive the rammed earth plate 18 to flip. After the ramming of the rammed earth plate 18 is completed, the external propulsion device is turned on to drive the rammed earth plate 18 to continue moving forward. At this time, the support plate 22 is squeezed and pushed against the support plate 22 at the rear. When the support plate 22 just leaves the rammed earth plate 18, the external installation device will press down with the support frame 46 and support between the two relative support plates 22 to form a support for the groove. At this time, the external propulsion device is stopped, and the flip drive is turned off and the transposition drive is turned on. The flip drive is turned off to reset the rammed earth plate 18 to an inverted eight-shaped shape, so that the rammed earth plate 18 and the side wall of the groove form a rammed earth space, and the transposition drive is turned on to facilitate the transportation of soil to the rammed earth space for subsequent pressing.

[0069] Reference Figure 7-Figure 11 The pushing mechanism includes a board box body 24, and a plurality of support plates 22 are symmetrically placed in the board box body 24. A drop hole is symmetrically opened at the bottom of the board box body 24, and a pushing portion for pushing the support plate 22 out of the drop hole is provided in the board box body 24, so that the support plate 22 is pushed and falls from the drop hole and separates from the board box body 24.

[0070] The pushing-away portion includes a baffle frame 25 and a push plate 27, and multiple support plates 22 are arranged between the baffle frame 25 and the push plate 27. A movable cavity 32 is opened at the bottom of the plate box body 24, and a vertical plate 30 is movable in the movable cavity 32. A horizontal baffle 31 is arranged on the top of the vertical plate 30 for blocking the drop hole to prevent the multiple support plates 22 from being excessively pushed away by the push plate 27, wherein the drop hole is located below the baffle frame 25.

[0071] The vertical plate 30 is reset and retracted in the movable cavity 32 by the first reset spring 34. A limiting metal rod 33 cooperating with the vertical plate 30 is also provided in the movable cavity 32. The bottom of the vertical plate 30 extends out of the movable cavity 32. Therefore, during the flipping process of the rammed earth plate 18, the vertical plate 30 will be pushed. In this way, the horizontal baffle 31 that originally blocked the support plate 22 from falling will be pushed away from the drop hole, allowing the support plate 22 to fall smoothly and separate from the plate box body 24.

[0072] The pushing portion also includes a first electromagnetic generator 26, on which a push rod 28 connected to a push plate 27 is provided, and a first magnet block 29 is fixed to the push plate 27 on the side facing the first electromagnetic generator 26. It should be noted that when the push-against vertical plate 30 is pushed, the push-against vertical plate 30 is pressed against the limiting metal rod 33, thereby connecting the circuit and turning on the first electromagnetic generator 26, wherein the first electromagnetic generator 26 is a prior art and will not be elaborated on herein.

[0073] Then the first electromagnetic generator 26 generates a magnetic field opposite to the first magnet block 29, so the push plate 27 will no longer push against the multiple support plates 22, so that the support plate 22 above the blanking hole will no longer be pushed and fall off the plate box body 24, wherein the first electromagnetic generator 26 is also provided with a compression spring for pushing the push rod 28, thereby ensuring that when the first electromagnetic generator 26 is not connected, the push rod 28 brings the push plate 27 to push the multiple support plates 22 toward the blanking hole.

[0074] When the rammed earth plate 18 is turned over to a vertical state, the support plate 22 will fall into the rammed earth plate 18 .

[0075] Embodiment 8

[0076] Reference Fig.12 and Fig.13 State, the adjacent side walls of the rammed earth plate 18 are provided with top grooves 19 and side grooves 20 that are interconnected, the adjacent groove walls of the top groove 19 are respectively provided with bottom cavities 35 and side cavities 36, a bottom plate 37 is arranged in the bottom cavity 35, which is reset and lifted by a second reset spring 38, a downward pressure rod 39 is arranged at the bottom of the bottom plate 37, and a metal contact piece 40 corresponding to the downward pressure rod 39 is arranged at the bottom of the bottom cavity 35, so that after the support plate 22 falls through the top groove 19, it will squeeze the bottom plate 37 on the bottom cavity 35, and make the downward pressure rod 39 communicate with the metal contact piece 40, and then turn on the second electromagnetic generator 44, wherein the second electromagnetic generator 44 is a prior art and will not be elaborated on here.

[0077] A side push plate 41 that pushes the support plate 22 is provided in the side cavity 36, a second electromagnetic generator 44 is provided in the side cavity 36, a second magnet block 43 is provided on the side of the side push plate 41 facing the second electromagnetic generator 44, the side push plate 41 is retracted and extended in the side cavity 36 through a third return spring 45, and a symmetrically arranged chamfer 42 is provided on the side of the side push plate 41 facing the second electromagnetic generator 44.

[0078] Therefore, after the second electromagnetic generator 44 is turned on, it will generate the same magnetic field as the second magnet block 43, and push the support plate 22 away from the side groove 20. After the second electromagnetic generator 44 is powered off, the side push plate 41 retracts into the side cavity 36 under the action of the third return spring 45, and the setting of the chamfer 42 facilitates the side push plate 41 to retract into the side cavity 36.

[0079] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An excavation support device for a municipal water supply and drainage pipeline trench, comprising an earth-digging support arranged in the trench, characterized in that: The digging support is provided with a spiral digging part (7) and a bulldozer part for digging forward, the digging support comprises a tail half ring (2), and ramming plates (18) are symmetrically arranged at both ends of the tail half ring (2) for turning toward the inner wall of the groove and tamping the side wall of the groove. The digging support is also provided with a displacement driving member for pushing the soil to shift to the side wall of the groove, and the side wall of the bulldozer is provided with a turning driving member for pushing the ramming plate (18) to rotate.

2. The excavation support device for municipal water supply and drainage pipeline trench according to claim 1, characterized in that: The earthmoving support further comprises: An end ring (1), the end ring (1) being coaxially arranged with the tail semi-ring (2), the tail semi-ring (2) being further fixed with an end semi-circular sealing plate (5) and a horizontal baffle (6) by bolts, and the end ring (1) being further provided with a semi-circular intercepting plate; The rammed earth plate (18) rotates on the tail half ring (2) via a rotating hinge. The rammed earth plate (18) is connected to the tail half ring (2) via a reset piece and drives the symmetrically arranged rammed earth plates (18) to rotate towards each other.

3. The excavation support device for municipal water supply and drainage pipeline trench according to claim 1, characterized in that: The transposition drive member comprises: A first drive motor (8) is fixed to the semicircular intercepting plate, and an output end of the first drive motor (8) is connected to the spiral excavation part (7); an outer side wall of the tail semi-ring (2) is symmetrically provided with an excavation groove (3), and an excavation hole (4) connected to the end ring (1) is provided on the excavation groove (3).

4. The excavation support device for municipal water supply and drainage pipeline trench according to claim 1, characterized in that: The bulldozer unit comprises: A vertical push plate (9) is fixed on the outer side wall of the end ring (1), one side of the vertical push plate (9) is symmetrically provided with an inclined push surface (10) inclined upward, and the other side of the vertical push plate (9) is a vertical plane, and one side of the rammed earth plate (18) is closely attached to the vertical plane of the vertical push plate (9).

5. The excavation support device for municipal water supply and drainage pipeline trench according to claim 4, characterized in that: The flip driving member comprises: A lifting plate (11), wherein the lifting plate (11) slides up and down on the side wall of the bulldozer, and both sides of the lifting plate (11) abut against the ramming plate (18); A second drive motor (12), wherein the second drive motor (12) is mounted on the vertical push plate (9) through a rod groove (14), a screw rod (13) is fixed to the output end of the second drive motor (12), and a mounting plate (15) is adapted on the screw rod (13), and the mounting plate (15) is connected to the lifting plate (11).

6. The excavation support device for municipal water supply and drainage pipeline trench according to claim 1, characterized in that: A plurality of support plates (22) are symmetrically extruded on the side wall of the groove, and a support frame (46) is installed between two opposing support plates (22). A propulsion mechanism for pushing the support plates (22) into the rammed earth plate (18) is provided above the bulldozer, and the propulsion mechanism comprises: A board placing box body (24), a plurality of support plates (22) are symmetrically placed in the board placing box body (24), a bottom of the board placing box body (24) is symmetrically provided with drop holes, and a push-off portion for pushing the support plates (22) out of the drop holes is provided in the board placing box body (24).

7. The excavation support device for municipal water supply and drainage pipeline trench according to claim 6, characterized in that: The push-off portion comprises: A baffle frame (25) and a push plate (27), a plurality of support plates (22) are arranged between the baffle frame (25) and the push plate (27), a movable cavity (32) is opened at the bottom of the plate placing box body (24), and a vertical plate (30) is movable in the movable cavity (32), and a transverse baffle (31) for blocking the drop hole is arranged on the top of the vertical plate (30); The vertical plate (30) is retracted and retracted in the movable cavity (32) by means of a first resetting spring (34); a limiting metal rod (33) cooperating with the vertical plate (30) is also provided in the movable cavity (32); the bottom of the vertical plate (30) extends out of the movable cavity (32).

8. The excavation support device for municipal water supply and drainage pipeline trench according to claim 7, characterized in that: The push-off portion further comprises: A first electromagnetic generator (26) is provided with a push rod (28) connected to a push plate (27), and a first magnet block (29) is fixed on the push plate (27) on the side facing the first electromagnetic generator (26).

9. The excavation support device for municipal water supply and drainage pipeline trench according to claim 4, characterized in that: The adjacent side walls of the rammed earth plate (18) are provided with a top groove (19) and a side groove (20) which are interconnected. The side groove (20) is arranged vertically opposite to the push plate (9). The adjacent groove walls of the top groove (19) are respectively provided with a bottom cavity (35) and a side cavity (36). A bottom plate (37) which is reset and lifted by a second reset spring (38) is arranged in the bottom cavity (35). A downward pressing rod (39) is arranged at the bottom of the bottom plate (37), and a metal contact sheet (40) corresponding to the downward pressing rod (39) is arranged at the bottom of the bottom cavity (35); A side push plate (41) that pushes a support plate (22) is provided in the side cavity (36), a second electromagnetic generator (44) is provided in the side cavity (36), a second magnet block (43) is provided on the side of the side push plate (41) facing the second electromagnetic generator (44), the side push plate (41) is extended and retracted in the side cavity (36) by a third return spring (45), and a symmetrically arranged chamfer (42) is provided on the side of the side push plate (41) facing the second electromagnetic generator (44).

10. The excavation support device for municipal water supply and drainage pipeline trench according to claim 4, characterized in that: The rammed earth plate (18) is provided with a film inlet hole (21) and a film outlet hole (23) which are interconnected, and the vertical push plate (9) is symmetrically provided with a film roll (16) in a rolled-up state. The film roll (16) is rolled and unrolled on the vertical push plate (9) through a roller bracket (17), and the film roll (16) passes through the film inlet hole (21) and the film outlet hole (23).

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