Self-propelled Larsen steel sheet pile trench soil cleaning machine and use method thereof

Abstract

The invention discloses a self-propelled soil cleaning machine for Larsen steel sheet pile grooves. The machine comprises a steel pipe frame, a gasoline engine, a gear box, a soil cutting disc, a scraper plate, a running wheel, and a strong magnet. The gasoline engine is arranged at the rear of the steel pipe frame, the gear box is arranged at the front of the steel pipe frame, the output shaft of the gasoline engine is connected to the input shaft of the gear box, the front and rear ends of the output shaft of the gasoline engine are rotatably connected to the steel pipe frame through a positioning block respectively, the soil cutting disc is connected to the output shaft of the gear box, the scraper plate is arranged behind the soil cutting disc and connected to the steel pipe frame, the cross-sectional shape of the scraper plate is consistent with the cross-sectional shape of the steel sheet pile, the middle and rear parts of the scraper plate are curved in an arc shape and the concave arc surface faces forward, two running wheels are arranged on both sides of the bottom of the steel pipe frame, a guide limit block is connected to the outer side of each running wheel, a plurality of strong magnets are connected to the bottom of the steel pipe frame, and a tail hook for connecting a pull rope is arranged at the rear end of the steel pipe frame.

Description

Technical Field

[0001] The present invention relates to a self-propelled soil cleaning machine for Larsen steel sheet pile grooves, which is a device for cleaning soil in a Larsen steel sheet pile U-shaped groove. The present invention also relates to a method for using the self-propelled soil cleaning machine for Larsen steel sheet pile grooves. Background Art

[0002] Larsen steel sheet piles, also known as U-shaped steel sheet piles, are a new type of building material used as retaining walls, water retaining walls, and sand retaining walls in bridge cofferdams, large pipeline laying, and temporary ditch excavation; they are used as retaining walls, retaining walls, and embankment protection at docks and unloading yards, playing an important role in engineering. Larsen steel sheet piles are used as foundation pit or trench support, which is not only green and environmentally friendly, but also has fast construction speed, high reuse rate of steel sheet piles, low construction cost, and high efficiency. They are currently widely used in various projects.

[0003] Larsen SP-IV steel sheet piles are the most widely used in China. As a temporary support structure for foundation pits, steel sheet piles are inserted vertically into the soil through piling equipment, and adjacent steel sheet piles on the left and right are engaged with each other through the locks on both sides. Since the U-shaped groove opening width of the steel sheet pile is about 35cm and the groove depth is 17cm, when excavating the foundation pit or trench, the soil in the U-shaped groove of the steel sheet pile cannot be removed by an excavator. Usually, workers stand at the edge of the foundation pit or at the bottom of the foundation pit and use specially processed crowbars, shovels, shovels and other tools to clean it, which is time-consuming and labor-intensive, with extremely low efficiency and high labor intensity. Moreover, since the depth of the foundation pit or trench is generally between 3m and 10m, workers stand at the edge of the foundation pit or in the foundation pit to carry out high-intensity construction work, which is not only very inefficient, but also has huge safety hazards and is prone to casualties. Summary of the invention

[0004] In view of the above-mentioned defects existing in the prior art, the present invention provides a soil cleaning machine for Larsen steel sheet pile grooves which can operate safely and has high construction efficiency.

[0005] The present invention is realized by the following technical scheme: a self-propelled Larsen steel sheet pile groove soil cleaning machine, characterized in that it includes a steel pipe frame, a gasoline engine, a gear box, a soil cutting disc, a scraper plate, a running wheel, and a strong magnet, wherein the gasoline engine is arranged at the rear of the steel pipe frame, the gear box is arranged at the front end of the steel pipe frame, the output shaft of the gasoline engine is connected to the input shaft of the gear box, the front end and the rear end of the output shaft of the gasoline engine are rotatably connected to the steel pipe frame through a positioning block respectively, and the soil cutting disc is detachably connected to the output shaft of the gear box The scraper plate is arranged behind the soil cutting disc and is fixedly connected to the steel pipe frame. The cross-sectional shape of the scraper plate is consistent with the cross-sectional shape of the steel sheet pile. The middle and rear part of the scraper plate is bent in an arc shape with its concave arc surface facing forward. Two running wheels are respectively arranged on both sides of the bottom of the steel pipe frame. The distance between the running wheels on both sides is consistent with the distance between the locking buckles on both sides of the steel sheet pile. A guide limit block is connected to the axial outer side of each running wheel. A plurality of strong magnets are connected to the bottom of the steel pipe frame. A tail hook for connecting a pull rope is arranged at the rear end of the steel pipe frame.

[0006] In the present invention, the gasoline engine is used to provide power to drive the gear box to drive the soil cutting disc to rotate. When the present invention is working, in the foundation pit excavation construction with Larsen IV type steel sheet pile vertical support, the running wheels ride on the locks on both sides of the steel sheet pile, the soil cutting disc is downward, the tail hook is upward, and the U-shaped groove of the steel sheet pile is aligned and installed on the top of the steel sheet pile. The cleaning machine is adsorbed on the steel sheet pile by the attraction of a strong magnet to prevent the cleaning machine from falling. After installation, the gasoline engine is ignited and started. The gasoline engine drives the gear box to drive the soil cutting disc to rotate. The cleaning machine moves vertically downward along the steel sheet pile under the action of gravity. During the running process of the cleaning machine, the blade of the soil cutting disc rotates to cut the soil, and the soil in the groove is scraped off by the scraper behind the soil cutting disc. The cleaning machine can clean the soil in the steel sheet pile groove during the vertical travel from top to bottom. After cleaning one steel sheet pile, the cleaning machine is pulled back to the top of the steel sheet pile by a pull rope, and then it can be moved to clean the next steel sheet pile. The scraper plate of the present invention can not only scrape away the residual soil after the soil cutting disc works, but also can be used as a baffle to separate the soil from the engine to protect the engine.

[0007] Furthermore, in order to facilitate shoveling up the soil in the steel sheet pile groove and allowing it to fall off freely, the scraper plate is at an angle of 30 to 45 degrees to the advancing direction.

[0008] Furthermore, in order to facilitate the scraping of soil in the steel sheet pile groove, the lower edge of the scraper plate is provided with a serrated blade.

[0009] Furthermore, in order to enable the magnetic force of the strong magnet to both adsorb the cleaning machine on the steel sheet pile and ensure that the cleaning machine moves stably under its own weight, the strong magnet is a disc magnet with a diameter of 40 to 50 mm, and the number of the strong magnets is 4 to 6, which are symmetrically arranged at the bottom of the steel pipe frame.

[0010] Furthermore, the gasoline engine is an air-cooled two-stroke engine. The use of an air-cooled two-stroke engine can make the overall structure of the equipment simple and light, reliable and durable in operation, low in manufacturing cost, and simple in maintenance while meeting the power requirements.

[0011] Furthermore, in order to obtain sufficient torque to ensure that the soil cutting disc cuts the soil smoothly and powerfully, the output speed of the gear box is 15 to 30 r / min.

[0012] Furthermore, in order to improve the soil cutting efficiency and effect, the output shaft of the gear box is a left and right double output structure, and at least one soil cutting disc is connected to the output shaft at each end of the gear box.

[0013] Furthermore, two soil cutting discs are connected to the output shaft at each end of the gear box.

[0014] Furthermore, in order to facilitate uniform soil cutting, the soil cutting disc includes four blades of different lengths, and the thickness of the blades gradually increases from the blade edge to the blade back.

[0015] Furthermore, in order to facilitate the connection of the scraper board and ensure the working reliability of the scraper board, the lower part of the steel pipe frame is connected to a scraper board fixing frame which can be placed in the U-shaped groove of the steel sheet pile, and the scraper board is connected to the scraper board fixing frame.

[0016] The beneficial effects of the present invention are as follows: the present invention changes the manual construction operation mode in the prior art and adopts a mechanized operation mode, which can not only greatly improve the construction operation efficiency, but also allow workers to stay away from the edge of the foundation pit, thereby achieving safe operation. The present invention is light in weight, flexible and convenient to operate, and can be easily operated by one worker. The present invention has high working efficiency and can save construction costs. According to calculations, under different soil conditions, a worker can clean 80 to 120 m of soil in the steel sheet pile groove in 8 hours, while the present invention can complete 300 to 450 m, and the work efficiency is improved by 3 to 5 times. Moreover, the deeper the foundation pit, the fewer times the equipment is installed and disassembled, and the more significant the efficiency advantage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a plan view of the present invention;

[0018] Figure 2 for Figure 1 Side view of

[0019] Figure 3 for Figure 1 AA section diagram in;

[0020] Figure 4 for Figure 1 BB section diagram in;

[0021] Figure 5 for Figure 1 CC section diagram in;

[0022] Figure 6 It is a schematic diagram of the structure of the present invention when it is working;

[0023] Figure 7 This is a cross-section of a Larsen steel sheet pile;

[0024] In the figure: 1. steel pipe frame, 2. gasoline engine, 3. connecting plate, 4. positioning block, 5. gear box, 6. soil cutting disc, 7. scraper board, 8. running wheel, 9. guide limit block, 10. powerful electromagnet, 11. tail hook, 12. pull rope, 13. bolt pair, 14. scraper board fixing frame, 15. rubber anti-slip sleeve, 16. steel sheet pile. DETAILED DESCRIPTION

[0025] The present invention will be further described below by way of non-limiting embodiments and in conjunction with the accompanying drawings:

[0026] As shown in the attached drawings, a soil cleaning machine for a Larsen steel sheet pile trench comprises a steel pipe frame 1, a gasoline engine 2, a gear box 5, a soil cutting disc 6, a scraper plate 7, a running wheel 8, and a strong magnet 10.

[0027] The steel tube frame 1 is a frame structure connected by welding of 25*25mm square tubes. The main body of the steel tube frame 1 is a rectangular structure, and handles are connected on both sides of the upper part. The handles are provided with rubber anti-skid sleeves 15 to prevent slipping and strangling when carrying equipment. A scraper blade fixing frame 14 is connected to the lower front side of the steel tube frame 1, and the scraper blade fixing frame 14 can be placed in the U-shaped groove of the steel sheet pile. The gasoline engine 2 is arranged at the rear of the steel tube frame 1, and the gear box 5 is arranged at the front end of the steel tube frame 1. The gasoline engine 2 is connected to the output shaft of the gasoline engine 2 through the connecting plate 3, and the output shaft of the gasoline engine 2 is connected to the input shaft of the gear box 5. A positioning block 4 is respectively arranged at the front and rear ends of the output shaft of the gasoline engine 2. The output shaft of the gasoline engine 2 can be rotatably passed through the shaft hole on the positioning block 4, and the output shaft of the gasoline engine 2 is connected and fixed to the steel tube frame 1 through the positioning block 4. In this embodiment, the gasoline engine 2 adopts an air-cooled two-stroke engine. Since the weight required for the equipment should not be too large, a small-displacement gasoline engine of about 50CC is selected, with a power of 1.9KW and recoil start. The soil cutting disc 6 is detachably connected to the output shaft of the gearbox 5. The gearbox 5 is composed of a reduction gear, which is a prior art. The function of the gearbox 5 is to transmit the output power of the gasoline engine to the front soil cutting disc 6, and convert the high speed of the engine into the low speed of the soil cutting disc 6. To obtain sufficient torque, the transmission ratio of the gearbox 5 is set to be relatively large, so that the speed of the output shaft is controlled at 15-30r / min, so that sufficient torque can be obtained to ensure that the soil cutting disc is stable and powerful when cutting soil. In order to improve the soil cutting efficiency and soil cutting effect, the output shaft of the gearbox 5 in the present invention is a left and right double output structure, and at least one soil cutting disc 6 is connected to the output shaft at each end of the gearbox 5. In this embodiment, preferably, two soil cutting discs 6 are connected to the output shaft at each end of the gearbox 5. Each soil cutting disc 6 includes four blades. To facilitate uniform soil cutting, the four blades of each soil cutting disc 6 are set to different lengths. The thickness of the blade gradually increases from the blade edge to the blade back, and the blade back thickness is 6mm. The maximum working radius of the soil cutting disc 6 is 11cm, the blade width is 3.5cm, the height of the blade tip from the steel sheet pile is about 1cm, and the width range of the soil cutting disc is 28cm. In order to adapt to Larsen steel sheet piles of different specifications (mainly non-standard steel sheet piles), spare blades of other length specifications can be equipped and can be replaced at any time as needed. The scraper plate 7 is arranged at the rear of the soil cutting disc 6 and is fixedly connected to the steel pipe frame 1 by a bolt pair 13. The scraper plate 7 is made of a 5mm thick steel plate, and its cross-sectional shape is consistent with the cross-sectional shape of the steel sheet pile. Its two wings extend all the way to the locking position of the steel sheet pile. This structural form can ensure that all the soil in the cross section of the steel sheet pile is scraped off. The front edge of the scraper plate 7 is provided with a serrated blade, and the front end of the scraper plate 7 is about 3 mm away from the steel plate surface of the U-shaped groove of the steel sheet pile, so as to scrape away the soil in the steel sheet pile groove to the maximum extent and prevent it from hitting protrusions such as welding scars in the steel sheet pile.The middle and rear part of the scraper blade 7 is curved in an arc shape with its concave arc surface facing forward, forming an angle of 30 to 45 degrees with the advancing direction, so as to facilitate the soil in the steel sheet pile groove to be shoveled up and fall off freely. In order to facilitate the connection of the scraper blade 7 and ensure the working reliability of the scraper blade 7, in this embodiment, a scraper blade fixing frame 14 that can be placed in the U-shaped groove of the steel sheet pile is connected to the lower part of the steel pipe frame 1, and the scraper blade 7 is connected to the scraper blade fixing frame 14 by a bolt pair 13. The scraper blade fixing frame 14 is made of steel pipe welding, and its structure is as shown in the attached figure. Figure 4 As shown. The function of the scraper plate 7 is to scrape away the residual soil after the soil cutting disc 6 works, and it can be used as a baffle to separate the soil from the engine to protect the engine. Two running wheels 8 are respectively arranged on the left and right sides of the bottom of the steel pipe frame 1, with a total of four running wheels 8. The diameter of the running wheel 8 is 4 cm. The center distance of the running wheels 8 on the left and right sides is consistent with the distance between the two side lock buckles of the steel sheet pile. The material of the running wheel 8 is a non-slip rubber wheel. The running wheel 8 is set without driving force and can rotate freely. A guide limit block 9 is connected to the axial outer side of each running wheel 8. The guide limit block 9 is used to keep the equipment moving along the axis of the steel sheet pile all the time to prevent the equipment from deviating from the direction in the working state. A plurality of strong magnets 10 are connected to the bottom of the steel pipe frame 1. The function of the strong magnet 10 is to adsorb the equipment on the steel sheet pile through the magnetic force of the magnet to prevent the equipment from falling. The magnetic force of the magnet should not affect the safety of the equipment due to too small adsorption force, nor affect the equipment's running by gravity due to too large adsorption force. Preferably, the strong magnet 10 is a disc magnet with a diameter of 40 to 50 mm. The number of strong magnets is determined according to the actual working conditions on site, and is preferably set at 4 to 6, which are symmetrically arranged at the bottom of the steel pipe frame 1. A tail hook 11 is provided at the rear end of the steel pipe frame 1, and a pull rope 12 is connected to the tail hook 11. The function of the tail hook 11 is to connect the equipment to the ground through a pull rope. The pull rope 12 is slightly elastic, one end of which is connected to the tail hook 11 of the steel pipe frame 1, and the other end is fixed to the ground. The pull rope 12 can protect the equipment and prevent the equipment from accidentally falling into the foundation pit, and the workers can also pull the equipment back to the ground from the foundation pit after the equipment completes the soil clearing operation.

[0028] When the present invention is used, the running wheels 8 on both sides of the cleaning machine are respectively mounted on the locks on both sides of the steel sheet pile 16, the soil cutting disc 6 is downward, the tail hook 11 is upward, and the cleaning machine is installed on the top of the steel sheet pile 16. Due to the effect of magnetic force, the cleaning machine is automatically adsorbed on the steel sheet pile 16. After the equipment is installed in place, the gasoline engine 2 is ignited and started, and the gasoline engine 2 drives the gear box 5 to drive the soil cutting disc 6 to rotate. The cleaning machine moves vertically downward along the steel sheet pile 16 under the action of gravity. During the running process of the cleaning machine, the soil is cut by the rotation of the blade of the soil cutting disc 6, and the soil in the groove is scraped off by the scraper plate 7 behind the soil cutting disc 6. During the vertical movement from top to bottom, the cleaning machine can clean the soil in the steel sheet pile groove. After cleaning a steel sheet pile, the operator pulls the cleaning machine back to the top of the steel sheet pile through the pull rope 12, and then moves to the next steel sheet pile, repeating the operation process of the previous cycle.

[0029] The overall dimensions of the invention are: length 57cm, width 44cm, height 35cm, and total weight 14.5KG. The invention has a small overall volume, light weight, and is easy to operate. It can be easily operated by one worker, which can greatly improve work efficiency and greatly improve safety.

[0030] The other parts of this embodiment are all prior art and will not be described in detail here.

Claims

1. A self-propelled Larsen steel sheet pile trench soil cleaning machine, characterized by: The invention comprises a steel tube frame (1), a gasoline engine (2), a gear box (5), a soil cutting disc (6), a scraper board (7), a running wheel (8), and a strong magnet (10), wherein the gasoline engine (2) is arranged at the rear of the steel tube frame (1), the gear box (5) is arranged at the front of the steel tube frame (1), the output shaft of the gasoline engine (2) is connected to the input shaft of the gear box (5), the front and rear ends of the output shaft of the gasoline engine (2) are rotatably connected to the steel tube frame (1) via a positioning block (4), the soil cutting disc (6) is detachably connected to the output shaft of the gear box (5), and the scraper board (7) is arranged at the front of the gear box (5). The rear of the soil cutting disc (6) is fixedly connected to the steel pipe frame (1), the cross-sectional shape of the scraper plate (7) is consistent with the cross-sectional shape of the steel sheet pile, the middle and rear part of the scraper plate (7) is curved in an arc shape with its concave arc surface facing forward, two running wheels (8) are respectively arranged on both sides of the bottom of the steel pipe frame (1), the distance between the running wheels (8) on both sides is consistent with the distance between the locking buckles on both sides of the steel sheet pile, a guide limit block (9) is connected to the axial outer side of each running wheel (8), a plurality of strong magnets (10) are connected to the bottom of the steel pipe frame (1), and a tail hook (11) for connecting a pull rope is arranged at the rear end of the steel pipe frame (1); The output shaft of the gear box (5) is a left and right double output structure. Two soil cutting discs (6) are connected to the output shaft at each end of the gear box (5). The soil cutting disc (6) includes four blades of different lengths. The thickness of the blades gradually increases from the blade edge to the blade back.

2. The self-propelled Larsen steel sheet pile trench soil cleaning machine according to claim 1 is characterized by: The scraper plate (7) forms an angle of 30 to 45 degrees with the advancing direction.

3. The self-propelled Larsen steel sheet pile trench soil cleaning machine according to claim 1 is characterized by: The lower edge of the scraper plate (7) is provided with a serrated blade.

4. The self-propelled Larsen steel sheet pile trench soil cleaning machine according to claim 1 is characterized by: The strong magnet (10) is a disc magnet with a diameter of 40 to 50 mm. The number of the strong magnets (10) is 4 to 6 and they are symmetrically arranged at the bottom of the steel pipe frame (1).

5. The self-propelled Larsen steel sheet pile trench soil cleaning machine according to claim 1 is characterized by: The gasoline engine (2) is an air-cooled two-stroke engine.

6. The self-propelled Larsen steel sheet pile trench soil cleaning machine according to claim 1 is characterized by: The output speed of the gear box (5) is 15-30 r / min.

7. A method for using the self-propelled Larsen steel sheet pile trench soil cleaning machine as claimed in any one of claims 1 to 6, characterized in that: At the top of the steel sheet pile (16), the running wheels (8) on both sides of the cleaning machine are respectively mounted on the lock buckles on both sides of the steel sheet pile, and the soil cutting disc (6) is downwardly facing and the tail hook (11) is upwardly facing, and the cleaning machine is adsorbed on the top of the steel sheet pile (16) by means of a strong magnet (10); after the cleaning machine is installed in place, the gasoline engine (2) is ignited and started, and the gasoline engine (2) drives the gear box (5) to drive the soil cutting disc (6) to rotate, and the cleaning machine moves vertically downward along the steel sheet pile (16) under the action of gravity. During the movement, the soil is cut by the rotation of the blade of the soil cutting disc (6), and the soil in the groove is scraped off by the scraper plate (7). During the movement from top to bottom, the cleaning machine cleans the soil in the U-shaped groove of the steel sheet pile (16); after cleaning one steel sheet pile (16), the operator pulls the cleaning machine back to the top of the steel sheet pile (16) by means of a pull rope (12), and then moves to the next steel sheet pile (16), and repeats the operation process of the previous cycle.

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