Straight way excavation device for building foundation pit

Abstract

The invention discloses a building foundation pit straightway excavation device, and particularly relates to the field of foundation pit straightway excavation, the building foundation pit straightway excavation device comprises a box body, the middle of the box body is fixedly connected with a protection frame, the bottom of the box body is provided with a soil discharge port and a through hole, and the middle of the soil discharge port is fixedly connected with a fixing rod. The position of the next hole is conveniently determined through the arranged laser emitter, the multiple holes are located in the same straight line, the straightway excavation quality is improved, through the arranged protection frame and the protection plate at the bottom of the through hole, soil generated by drilling can be discharged through soil discharging openings in the two sides of the through hole, the situation that the soil is scattered all around or fills the previous hole is avoided, and the construction efficiency is improved. According to the invention, soil among a plurality of holes can be conveniently cleaned, a straight way can be conveniently excavated in a communicated manner, and the soil discharged from the soil discharge port can be pushed to two sides through the arranged waste soil push-away mechanism, so that the soil can be conveniently and manually cleaned and the widths of two sides of the straight way can be conveniently determined through the pushed soil distance, and the working efficiency and the straight way excavation quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit straight channel excavation, and more specifically to a building foundation pit straight channel excavation device. Background Art

[0002] Foundation pit refers to the space below the ground excavated for the construction of the foundation and basement of a building (including structures). It is used in construction projects to provide a space so that the foundation masonry work can be carried out in the position specified by the design.

[0003] When constructing canal tunnels, bridges, etc., it is necessary to dig straight roads in the foundation pit, which is usually done by excavators. However, it is not easy for excavators to pass through some narrow sections, and manual excavation is laborious and inefficient, which will affect the excavation of the straight road in the foundation pit. A Chinese patent with patent application number CN202210074931.0 discloses a straight channel excavation device and excavation method for foundation pits for construction, which includes a chassis, a ground drilling mechanism, a lifting mechanism and a guiding mechanism. The chassis is used to carry the ground drilling mechanism, the lifting mechanism and the guiding mechanism; the lifting mechanism can drive the ground drilling mechanism to move towards or away from the land at the foundation pit to be excavated; the ground drilling mechanism can drill the land at the foundation pit to be excavated under the coordinated drive of the lifting mechanism; the guiding mechanism can guide the drilling of the ground drilling mechanism; the ground drilling mechanism, the lifting mechanism and the guiding mechanism cooperate with each other to realize the straight channel excavation of the foundation pit in narrow sections. The straight channel excavation device has the effect of being able to perform straight channel excavation of foundation pits in narrow sections; However, it can be seen from the drawings in the specification that a straight channel is excavated by directly drilling multiple holes and then manually cleaning the connected holes. The soil generated during the drilling process will be directly distributed around the holes or even directly fill the previous hole, thereby affecting the efficiency of later manual cleaning of the straight channel and opening up multiple holes. It is also inconvenient to determine the width on both sides of the straight channel, which affects the quality of the excavated straight channel. Therefore, a device for excavating a straight channel in a construction foundation pit is proposed. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a straight tunnel excavation device for a construction foundation pit to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a straight road excavation device for a construction foundation pit, comprising a box body, a protective frame is fixedly connected to the middle of the box body, a soil discharge port and a through hole are opened at the bottom of the box body, a fixing rod is fixedly connected to the middle of the soil discharge port, a lifting plate is arranged in the middle of the protective frame, first threaded rods are symmetrically inserted at both ends of the lifting plate, and a protective box is fixedly connected to the top of the box body; A punching mechanism is provided at the bottom of the lifting plate, a first gear is fixedly connected to the top of the first threaded rod, a second motor is fixedly connected to the middle of the protective box, an output end of the second motor is connected to the second gear, a waste soil pushing mechanism is provided on one side of the protective frame, a mobile driving mechanism is provided in the middle of the box body, and a laser emitter and a controller are provided on one side of the box body.

[0006] In a preferred embodiment, the laser emitter is fixed to the bottom of one side of the box, the laser emitter is located in the middle of one side of the through hole, and the controller is located on the top of the laser emitter.

[0007] In a preferred embodiment, a push rod is fixedly connected to the middle part of one side of the box body close to the controller, counterweight blocks are symmetrically arranged on both sides of the protective frame, the bottom end of the first threaded rod is rotatably connected to the middle part of the fixed rod, and the first threaded rod is threadedly connected to the lifting plate.

[0008] In a preferred embodiment, the first gear is located in the middle of the protection box, the second gear is located between the two first gears, the second gear is meshed with the first gears, and the cross-sectional shape of the lifting plate is adapted to the cross-sectional shape of the inner cavity of the protection frame.

[0009] In a preferred embodiment, the punching mechanism includes a first motor fixed on the top of the lifting plate, the output end of the first motor is fixedly connected to a connecting sleeve, a rotating rod is provided at the bottom of the connecting sleeve, a threaded plug rod is fixedly connected to the top of the rotating rod, the top end of the threaded plug rod extends to the interior of the connecting sleeve and is threadedly connected, and a spiral blade is fixedly provided on the middle fixed sleeve of the rotating rod.

[0010] In a preferred embodiment, the through hole corresponds to the rotating rod and the spiral blade, the soil discharge port and the through hole are both connected to the middle of the protective frame, and the bottom fixed sleeve of the lifting plate is provided with a screw tube, which is sleeved in the middle of the first threaded rod.

[0011] In a preferred embodiment, the waste soil pushing mechanism includes two limiting slide grooves opened at the bottom of the box body, a limiting slider is arranged in the middle of the limiting slide groove, a guide scraper is fixedly connected to the bottom of the limiting slider, and the opposite side walls of the two guide scrapers are arranged as inclined surfaces.

[0012] In a preferred embodiment, a second stabilizing rod and a second threaded rod are inserted in the middle of the limit slider, the second threaded rod is threadedly connected to the limit slider, the cross-sectional shape of the limit slider is set to an "L" shape, the limit slider is slidably connected to the limit sliding groove, support plates are symmetrically arranged at both ends of the second stabilizing rod and the second threaded rod, a third motor is fixedly connected to one side of the support plate, and the output end of the third motor is fixedly connected to one end of the second threaded rod.

[0013] In a preferred embodiment, the mobile drive mechanism includes a lifting frame arranged in the middle of the box body, and fixed plates are symmetrically fixedly connected on both sides of the inner cavity of the box body. An electric push rod is fixedly connected to the top of the fixed plate, and the moving end of the electric push rod is fixedly connected to the top wall of the lifting frame.

[0014] In a preferred embodiment, the lifting frame is symmetrically fixedly connected with stabilizing plates on all four sides, the stabilizing plates penetrate the wall of the box and extend to the outside, the bottom of the stabilizing plates is fixedly connected with lifting legs, the lifting legs are located around the box, the bottom of the lifting legs is rotatably connected with moving wheels, and a plurality of first stabilizing rods are inserted in the middle of the lifting frame.

[0015] Technical effects and advantages of the present invention: 1. The present invention firstly facilitates the determination of the position of the next hole by means of a laser emitter, so that multiple holes are in the same straight line, and the quality of the excavated straight road is improved. The protective frame and the protective plate at the bottom of the through hole can make the soil generated by the drilling be discharged through the soil discharge ports on both sides of the through hole, so as to avoid scattering or filling the previous hole, and facilitate the cleaning of the soil between multiple holes, and facilitate the connection of the excavated straight road. The waste soil pushing mechanism can push the soil discharged from the soil discharge port to both sides, so as to facilitate manual cleaning of the soil and determine the width of both sides of the straight road through the distance of the pushed soil, thereby improving the work efficiency and the quality of the excavated straight road, and improving the use effect. 2. The present invention also starts the first motor to control the rotation of the rotating rod and the spiral blade, and starts the second motor to control the second gear to drive the first gear to rotate, so that the first threaded rod drives the lifting plate to move up and down, thereby controlling the rotation of the rotating rod and the spiral blade to move up and down, which is convenient for drilling, and the first threaded rod is used to improve the stability of the lifting plate moving up and down. Through the cooperation of the threaded rod and the connecting sleeve, the rotating rod and the spiral blade can be disassembled and replaced as needed, which is convenient for use; 3. The present invention can also adjust the height between the box and the ground as needed through the mobile driving mechanism, and can improve the stability of the box through the counterweight block, and improve the stability of the rotating rod and the spiral blade drilling, improve the stability of the lifting frame moving up and down through the first stabilizing rod, and can make multiple holes in a straight line through the laser transmitter, and facilitate the auxiliary positioning of the next hole position, which is convenient for use, and can be pushed and moved through the push rod to improve the use effect; In summary, through the mutual influence of the above-mentioned multiple effects, it is convenient to discharge the soil at a fixed point when drilling, to avoid the soil from scattering or filling the previous hole, to facilitate manual cleaning of the soil and determine the width on both sides of the straight road, to improve work efficiency and the quality of excavating the straight road, to facilitate auxiliary positioning of the next hole position, to make multiple holes in a straight line position, and to improve the excavation quality of the straight road. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a structural schematic diagram from another angle of the present invention.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the disassembled structure of the second gear, the lifting plate and the rotating rod of the present invention.

[0020] Figure 5 It is a schematic diagram of the cross-sectional connection structure of the box body and the protective frame of the present invention.

[0021] Figure 6 It is a structural schematic diagram of the mobile driving mechanism of the present invention.

[0022] Figure 7 It is a structural schematic diagram of the waste soil pushing away mechanism of the present invention.

[0023] The accompanying drawings are marked as follows: 1. box body; 2. protection frame; 3. discharge port; 4. through hole; 5. fixed rod; 6. lifting plate; 7. first threaded rod; 8. first motor; 9. rotating rod; 10. spiral blade; 11. first gear; 12. second gear; 13. second motor; 14. protection box; 15. laser transmitter; 16. controller; 17. push rod; 18. connecting sleeve; 19. threaded plug rod; 20. fixed plate; 21. lifting frame; 22. stabilizing plate; 23. lifting leg; 24. moving wheel; 25. electric push rod; 26. first stabilizing rod; 27. limiting slide groove; 28. limiting slider; 29. ​​guide scraper; 30. support plate; 31. second stabilizing rod; 32. second threaded rod; 33. third motor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] As attached Figure 1-7 The construction foundation pit straight road excavation device shown comprises a box body 1, a protective frame 2 is fixedly connected to the middle of the box body 1, a soil discharge port 3 and a through hole 4 are provided at the bottom of the box body 1, and the protective frame 2 can prevent soil from entering the middle of the box body 1 when the punching device punches holes, thereby affecting the driving effect, and the soil generated during the punching is conveniently discharged to both sides of the punching holes through the soil discharge port 3, a fixing rod 5 is fixedly connected to the middle of the soil discharge port 3, a lifting plate 6 is provided in the middle of the protective frame 2, and first threaded rods 7 are symmetrically inserted at both ends of the lifting plate 6, a protective box 14 is fixedly connected to the top of the box body 1, the bottom end of the first threaded rod 7 is limited by the fixing rod 5, and the lifting plate 6 can be controlled to move up and down by rotating the first threaded rod 7, which is convenient for driving use; A punching mechanism is provided at the bottom of the lifting plate 6, a first gear 11 is fixedly connected to the top of the first threaded rod 7, a second motor 13 is fixedly connected to the middle of the protection box 14, and a second gear 12 is connected to the output end of the second motor 13, a waste soil pushing mechanism is provided on one side of the protection frame 2, a mobile driving mechanism is provided in the middle of the box body 1, and a laser emitter 15 and a controller 16 are provided on one side of the box body 1. Through the punching mechanism, it is convenient to punch holes in the foundation pit ground, and by starting the second motor 13 to control the second gear 12 to drive the first gear 11 to rotate, the first threaded rod 7 can be controlled to rotate, which plays a driving role, and through the mobile driving mechanism, the box body 1 can be controlled to move up and down and conveniently move the box body 1, through the waste soil pushing mechanism, it is convenient to push away the soil on both sides of the hole when drilling a hole, so as to facilitate the manual shoveling of the soil between multiple holes to form a straight pit, which is convenient for excavating a straight road, and through the laser emitter 15, when drilling, it can be assisted to locate whether the position of the punching hole is in a straight line state, so as to improve the straight road excavation effect, and the controller 16 is convenient to start the control.

[0026] As attached Figure 1 As shown, the laser emitter 15 is fixed at the bottom of one side of the box body 1, the laser emitter 15 is located in the middle of one side of the through hole 4, and the controller 16 is located on the top of the laser emitter 15. The laser emitter 15 can be used to make multiple openings in a straight line position, and it is convenient to assist in locating the next hole position, which is convenient to use and can be conveniently controlled and used through the controller 16.

[0027] As attached Figure 1 , 3As shown, a push rod 17 is fixedly connected to the middle part of one side of the box body 1 close to the controller 16, counterweights are symmetrically arranged on both sides of the protective frame 2, the bottom end of the first threaded rod 7 is rotatably connected to the middle part of the fixed rod 5, the first threaded rod 7 and the lifting plate 6 are threadedly connected, and the push rod 17 is used to facilitate pushing and moving, and the counterweight can be used to improve the stability of the drilling and the stability of the equipment, and the first threaded rod 7 is supported by the fixed rod 5.

[0028] As attached Figure 3 , 4 As shown, the first gear 11 is located in the middle of the protective box 14, the second gear 12 is located between the two first gears 11, the second gear 12 is meshed with the first gear 11, the cross-sectional shape of the lifting plate 6 is adapted to the cross-sectional shape of the inner cavity of the protective frame 2, and the first gear 11 is controlled by the rotation of the second gear 12 to drive the first threaded rod 7 to rotate, so as to conveniently control the lifting plate 6 to move up and down stably in the middle of the protective frame 2, which is convenient for driving and use.

[0029] As attached Figure 3 , 4 As shown, the punching mechanism includes a first motor 8 fixed on the top of the lifting plate 6, the output end of the first motor 8 is fixedly connected with a connecting sleeve 18, the bottom of the connecting sleeve 18 is provided with a rotating rod 9, the top of the rotating rod 9 is fixedly connected with a threaded plug rod 19, the top of the threaded plug rod 19 extends to the inside of the connecting sleeve 18 and is threadedly connected, and the middle part of the rotating rod 9 is fixedly sleeved with a spiral blade 10. Starting the first motor 8 controls the connecting sleeve 18 and the threaded plug rod 19 to drive the rotating rod 9 to rotate, and the spiral blade 10 can be controlled to rotate to facilitate drilling holes on the foundation pit ground.

[0030] As attached Figure 2-4 As shown, the through hole 4 corresponds to the rotating rod 9 and the spiral blade 10, the discharge port 3 and the through hole 4 are both connected to the middle part of the protective frame 2, and the bottom fixed sleeve of the lifting plate 6 is provided with a screw tube, and the screw tube sleeve is convenient for the bottom ends of the rotating rod 9 and the spiral blade 10 to extend out through the through hole 4 in the middle of the first threaded rod 7 to drill holes, and the soil generated by drilling is conveniently discharged through the discharge port 3, and the transmission stability of the first threaded rod 7 and the lifting plate 6 is improved through the screw tube.

[0031] As attached Figure 2 , 7 As shown, the waste soil pushing mechanism includes two limit slide grooves 27 opened at the bottom of the box body 1, and a limit slider 28 is arranged in the middle of the limit slide groove 27. A guide scraper 29 is fixedly connected to the bottom of the limit slider 28. The opposite side walls of the two guide scrapers 29 are arranged as inclined surfaces. By sliding the limit slider 28 inside the limit slide groove 27, the guide scraper 29 can be controlled to move at the bottom of the box body 1, so that the soil discharged from the soil discharge port 3 can be pushed to the side away from the through hole 4, which is convenient for manual cleaning of the soil between the two holes and convenient for cleaning and use.

[0032] As attached Figure 2 , 7 As shown, a second stabilizing rod 31 and a second threaded rod 32 are inserted in the middle of the limit slider 28, the second threaded rod 32 is threadedly connected to the limit slider 28, the cross-sectional shape of the limit slider 28 is set to an "L" shape, the limit slider 28 is slidably connected to the limit slide groove 27, and support plates 30 are symmetrically arranged at both ends of the second stabilizing rod 31 and the second threaded rod 32. A third motor 33 is fixedly connected to one side of the support plate 30, and an output end of the third motor 33 is fixedly connected to one end of the second threaded rod 32. Starting the third motor 33 to control the rotation of the second threaded rod 32 can control the limit slider 28 to move to the opposite or opposite side in the middle of the lifting leg 23, thereby driving the guide scraper 29 to move to the opposite or opposite side at the bottom of the box body 1, and improving the stability of the movement of the limit slider 28 through the second stabilizing rod 31.

[0033] As attached Figure 1 , 2 As shown in Figures 3, 5 and 6, the mobile driving mechanism includes a lifting frame 21 arranged in the middle of the box body 1, and fixed plates 20 are symmetrically fixedly connected to the two sides of the inner cavity of the box body 1, and an electric push rod 25 is fixedly connected to the top of the fixed plate 20. The moving end of the electric push rod 25 is fixedly connected to the top wall of the lifting frame 21. The lifting frame 21 is controlled to move up and down by starting the electric push rod 25, and the height of the electric push rod 25 is fixedly supported by the fixed plate 20.

[0034] As attached Figure 1 , 2 As shown in Figures 3, 5 and 6, the lifting frame 21 is symmetrically fixedly connected with stabilizing plates 22 on all sides, which penetrate the wall of the box body 1 and extend to the outside, and the bottom of the stabilizing plates 22 is fixedly connected with lifting legs 23, which are located on all sides of the box body 1, and the bottom of the lifting legs 23 is rotatably connected with moving wheels 24, and a plurality of first stabilizing bars 26 are inserted in the middle of the lifting frame 21. The lifting frame 21 can control the stabilizing plate 22 to drive the lifting legs 23 to move up and down, and can control the distance between the bottom of the moving wheel 24 and the bottom wall of the box body 1, so that the distance between the bottom wall of the guide scraper 29 and the opposite side of the foundation pit can be adjusted as needed, which is convenient for cleaning, and the height of the box body 1 can be adjusted as needed, so as to facilitate the discharge of soil inside the discharge port 3 and improve the use effect.

[0035] Working principle of the present invention: When in use, the position of the through hole 4 can be adjusted by pushing the push rod 17, and the electric push rod 25 is started to control the moving wheel 24 to move up and down in turn, so that the height of the box body 1 can be adjusted as needed, thereby adjusting the height of the soil discharge port 3 and the bottom ground; The controller 16 controls the first motor 8 to start the rotation of the rotating rod 9 and the spiral blade 10, and the second motor 13 is started to control the lifting plate 6 in turn to drive the rotating rod 9 and the spiral blade 10 to move downward, so that the rotating rod 9 and the spiral blade 10 can drill holes on the foundation pit ground, and the soil generated by the drilling holes can be transported upward, and through the protective limit of the protective frame 2, the soil is discharged through the soil discharge port 3 and falls on both sides of the through hole 4; After the drilling is completed, the push rod 17 can be started to control the rotating rod 9 to move horizontally on the ground, so that the soil is transported upward in sequence and discharged through the soil discharge port 3, and the laser angle emitted by the laser transmitter 15 can be used to determine whether the movement of the box 1 is in a straight line, so that a straight excavation of the foundation pit can be realized; At the same time, after a hole is drilled, the second motor 13 can be started to control the rotating rod 9 to reset into the middle of the protection frame 2, and the push rod 17 can be pushed to control the box body 1 to move, so that the through hole 4 intersects with the previous hole, and the rotating rod 9 can be controlled to move downward, so that continuous multi-side drilling can be achieved, thereby realizing the function of excavating a straight road; When drilling the second hole, starting the third motor 33 and controlling the guide scraper 29 in turn can push the soil on both sides of the first hole to a position away from the hole, making it convenient to observe the hole opening position. When drilling multiple holes continuously, the distance between the laser line emitted by the laser emitter 15 and the center axis of the hole can be used to assist in positioning the downward movement of the hole, facilitate excavation of a straight road, and improve the use effect.

[0036] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the case of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A straight channel excavation device for a building foundation pit, comprising a box (1), characterized in that: A protective frame (2) is fixedly connected to the middle of the box body (1), a soil discharge port (3) and a through hole (4) are provided at the bottom of the box body (1), a fixing rod (5) is fixedly connected to the middle of the soil discharge port (3), a lifting plate (6) is provided in the middle of the protective frame (2), first threaded rods (7) are symmetrically inserted at both ends of the lifting plate (6), and a protective box (14) is fixedly connected to the top of the box body (1); A punching mechanism is provided at the bottom of the lifting plate (6), a first gear (11) is fixedly connected to the top of the first threaded rod (7), a second motor (13) is fixedly connected to the middle of the protection box (14), an output end of the second motor (13) is connected to the second gear (12), a waste soil pushing mechanism is provided on one side of the protection frame (2), a mobile driving mechanism is provided in the middle of the box body (1), and a laser emitter (15) and a controller (16) are provided on one side of the box body (1).

2. The construction foundation pit straight channel excavation device according to claim 1 is characterized in that: The laser emitter (15) is fixed to the bottom of one side of the box body (1), the laser emitter (15) is located in the middle of one side of the through hole (4), and the controller (16) is located on the top of the laser emitter (15).

3. The construction foundation pit straight channel excavation device according to claim 1, characterized in that: A push rod (17) is fixedly connected to the middle of one side of the box body (1) close to the controller (16), counterweight blocks are symmetrically arranged on both sides of the protection frame (2), the bottom end of the first threaded rod (7) is rotatably connected to the middle of the fixed rod (5), and the first threaded rod (7) is threadedly connected to the lifting plate (6).

4. The construction foundation pit straight channel excavation device according to claim 1, characterized in that: The first gear (11) is located in the middle of the protection box (14), the second gear (12) is located between the two first gears (11), the second gear (12) and the first gear (11) are meshed, and the cross-sectional shape of the lifting plate (6) is adapted to the cross-sectional shape of the inner cavity of the protection frame (2).

5. The construction foundation pit straight channel excavation device according to claim 1, characterized in that: The punching mechanism comprises a first motor (8) fixed on the top of the lifting plate (6); the output end of the first motor (8) is fixedly connected to a connecting sleeve (18); a rotating rod (9) is provided at the bottom of the connecting sleeve (18); a threaded insert rod (19) is fixedly connected to the top of the rotating rod (9); the top end of the threaded insert rod (19) extends into the interior of the connecting sleeve (18) and is threadedly connected; a spiral blade (10) is fixedly provided on the middle of the rotating rod (9).

6. The construction foundation pit straight channel excavation device according to claim 1, characterized in that: The through hole (4) corresponds to the rotating rod (9) and the spiral blade (10); the soil discharge port (3) and the through hole (4) are both connected to the middle of the protection frame (2); the bottom fixed sleeve of the lifting plate (6) is provided with a screw tube, which is sleeved in the middle of the first threaded rod (7).

7. The construction foundation pit straight channel excavation device according to claim 1, characterized in that: The waste soil pushing mechanism comprises two limit slide grooves (27) provided at the bottom of the box body (1), a limit slide block (28) being provided in the middle of the limit slide groove (27), a guide scraper (29) being fixedly connected to the bottom of the limit slide block (28), and the opposite side walls of the two guide scrapers (29) are both arranged as inclined surfaces.

8. The construction foundation pit straight channel excavation device according to claim 7, characterized in that: A second stabilizing rod (31) and a second threaded rod (32) are inserted into the middle of the limiting slider (28); the second threaded rod (32) is threadedly connected to the limiting slider (28); the cross-sectional shape of the limiting slider (28) is set to be "L"-shaped; the limiting slider (28) is slidably connected to the limiting slide groove (27); support plates (30) are symmetrically arranged at both ends of the second stabilizing rod (31) and the second threaded rod (32); a third motor (33) is fixedly connected to one side of the support plate (30); and an output end of the third motor (33) is fixedly connected to one end of the second threaded rod (32).

9. The construction foundation pit straight channel excavation device according to claim 1, characterized in that: The mobile drive mechanism comprises a lifting frame (21) arranged in the middle of the box body (1), fixed plates (20) are symmetrically fixedly connected to the two sides of the inner cavity of the box body (1), the top of the fixed plate (20) is fixedly connected to an electric push rod (25), and the moving end of the electric push rod (25) is fixedly connected to the top wall of the lifting frame (21).

10. The construction foundation pit straight channel excavation device according to claim 9, characterized in that: The lifting frame (21) is symmetrically and fixedly connected with a stabilizing plate (22) on all sides, the stabilizing plate (22) penetrates the wall of the box body (1) and extends to the outside, the bottom of the stabilizing plate (22) is fixedly connected with a lifting leg (23), the lifting leg (23) is located on all sides of the box body (1), and the bottom of the lifting leg (23) is rotatably connected with a moving wheel (24), and a plurality of first stabilizing rods (26) are inserted in the middle of the lifting frame (21).

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