Underground pre-sedimentation tank desilting robot

Abstract

The utility model belongs to the technical field of coal mine desilting equipment, and particularly discloses a desilting robot for an underground pre-sedimentation tank. The dredging robot mainly comprises a machine body, a crawler-type driving mechanism, an arm frame, a bucket, a sweeping wheel, a telescopic mechanism, a spiral reamer, a power mechanism, a silt suction pump, a smashing mechanism and a recycling box. Crawler-type driving mechanisms are arranged on the two sides of the machine body and used for driving the machine body to move. The front end of the machine body is connected with a bucket through an arm frame, and a plurality of sweeping wheels are arranged in the bucket; the front end of the arm frame is connected with the spiral reamer through a telescopic mechanism; a sludge suction pump is arranged in the machine body and used for sucking sludge accumulated in the bucket, and the smashing mechanism is arranged in the machine body and used for smashing large impurities mixed in the sludge; by the adoption of the dredging robot, the labor intensity of workers can be effectively relieved, the cleaning speed of the sedimentation tank is increased, the probability of water disasters is reduced, and the dredging robot has very important practical significance for guaranteeing safe production of mines.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine dredging equipment technical field, concretely relates to a downhole pre-deposition pool dredging robot. BACKGROUND

[0002] The downhole pre-deposition pool of coal mine is the important facility of guaranteeing the safety production of coal mine and preventing mine flood, along with the extension of mine exploitation, the increase of mine water inflow and other factors, a large amount of coal (rock) mud will enter the pre-deposition pool with mine drainage and gradually deposit to the bottom of the deposition pool, so that the effective water storage volume of the deposition pool is reduced, therefore, the accumulated sludge at the bottom of the deposition pool needs to be cleaned in time.

[0003] If the traditional manual dredging method is used, the labor intensity of workers is large, the progress is slow, and the efficiency is low, therefore, in actual production, when cleaning the sludge in the deposition pool, a suitable coal mine dredging equipment needs to be selected. The coal mine dredging equipment can reduce the labor intensity of workers, improve the cleaning speed of the deposition pool, reduce the probability of water disaster, and has very important practical significance to ensure the safety production of mine.

[0004] Therefore, the utility model provides a downhole pre-deposition pool dredging robot. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a downhole pre-deposition pool dredging robot, which can clean the accumulated sludge in the downhole pre-deposition pool in time and effectively improve the cleaning efficiency.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A downhole pre-deposition pool dredging robot, comprising a body, a crawler-type driving mechanism, an arm support, a shovel, a sweeping wheel, an extension mechanism, a spiral reamer, a power mechanism, a sludge suction pump, a crushing mechanism and a recovery box.

[0008] The crawler-type driving mechanism is arranged on both sides of the body and is used to drive the body to move.

[0009] The front end of the body is connected with the shovel through the arm support, and a plurality of sweeping wheels are arranged in the shovel; the front end of the arm support is connected with the spiral reamer through the extension mechanism, wherein the spiral reamer and the sweeping wheel are both provided with the power mechanism and are used to drive the spiral reamer and the sweeping wheel to rotate.

[0010] The sludge suction pump is arranged in the body, the inlet end of the sludge suction pump is connected with the inside of the shovel through the feeding pipe, and the outlet end of the sludge suction pump is connected with the crushing mechanism through the discharge pipe.

[0011] The crushing mechanism is arranged in the body and is used to crush the impurities mixed in the sludge.

[0012] The recycling box is arranged inside the machine body and below the crushing mechanism.

[0013] Preferably, the tracked driving mechanism comprises a first driving motor, a driving gear, a driven gear, a first transmission shaft, a second transmission shaft, front wheels, rear wheels and a track.

[0014] The first driving motor is fixedly installed inside the machine body, and an output shaft of the first driving motor is connected to the driving gear, the driving gear is engaged with the driven gear, the middle position of the driven gear is fixedly connected to the first transmission shaft, the first transmission shaft is rotationally connected to the machine body, and the two ends of the first transmission shaft are fixedly connected to the rear wheels; the middle part of the front wheels opposite to each other is fixedly connected to the second transmission shaft, and the second transmission shaft is rotationally connected to the machine body.

[0015] The track is arranged between the front wheels and the rear wheels corresponding to the sides of the machine body.

[0016] Preferably, the telescopic mechanism comprises a mounting frame and a first hydraulic cylinder.

[0017] The two sides of the mounting frame are connected to the two sides of the arm frame, the cylinder end of the first hydraulic cylinder is connected to the arm frame, and the telescopic end of the first hydraulic cylinder is connected to the mounting frame.

[0018] The spiral reamer is connected to the mounting frame through a reamer shaft.

[0019] Preferably, the power mechanism comprises a second driving motor, a driving sprocket, a first transmission chain, a first driven sprocket, a second driven sprocket, a second transmission chain and a third driven sprocket.

[0020] The cylinder end of the second driving motor is connected to the arm frame, and the output shaft of the second driving motor is fixedly connected to the middle position of the driving sprocket.

[0021] The driving sprocket is connected to the first driven sprocket through the first transmission chain, the middle position of the first driven sprocket is fixedly connected to the end of a sweeping shaft, and a plurality of sweeping wheels are arranged on the sweeping shaft.

[0022] The sweeping shaft is further provided with the second driven sprocket, the second driven sprocket is connected to the third driven sprocket through the second transmission chain, the middle position of the third driven sprocket is fixedly connected to the end of a reamer shaft, and the reamer shaft is provided with a spiral reamer.

[0023] Preferably, the crushing mechanism comprises a crushing cavity, a third driving motor, a speed reducer, a crushing shaft, crushing blocks and blades.

[0024] The crushing cavity is arranged inside the machine body, the side wall of the crushing cavity is provided with a feeding port, and the bottom of the crushing cavity is provided with a discharging port.

[0025] The cylinder end of the third driving motor is connected with the body, and the output shaft of the third driving motor is connected with the end of the crushing shaft through a speed reducer, wherein the crushing shaft is horizontally arranged in the crushing cavity.

[0026] A plurality of crushing blocks and blades are arranged on the crushing shaft.

[0027] Preferably, the outer contour of the crushing block is T-shaped, and the outer contour of the blade is helical.

[0028] Preferably, a maintenance opening is arranged at the top of the body, and the maintenance opening is located directly above the crushing mechanism.

[0029] Preferably, an auxiliary dredging mechanism is arranged below the arm support, and the auxiliary dredging mechanism comprises an arc-shaped shovel, a second hydraulic cylinder and an auxiliary traveling wheel.

[0030] The cylinder end of the second hydraulic cylinder is connected with the arm support, the telescopic end of the second hydraulic cylinder is connected with the end of the arc-shaped shovel, and the auxiliary traveling wheel is arranged below the second hydraulic cylinder.

[0031] The beneficial effects of the utility model are as follows:

[0032] The utility model discloses a downhole pre-deposition tank dredging robot, the dredging robot is through setting up telescopic mechanism at the front end of the body and drives spiral reamer to swing relative to the arm support, can complete the rotary cutting operation to the downhole pre-deposition tank bottom sludge, and through the sweeper wheel, the sludge cut down is gathered to the shovel interior, utilizes the sludge suction pump and recycles the sludge to the body interior, simultaneously through adding the crushing mechanism in the body interior, can again crush the stone or coal dust etc. Large -sized sundries mixed in the sludge, effectively improve the carrying capacity of the recovery box, and also facilitate the centralized recovery treatment to the sludge in the later period, through the auxiliary dredging mechanism that adds in the bottom of the arm support can shovel the stubborn sludge gathered at the bottom of the pre-deposition tank, and then through the spiral reamer and carry out rotary cutting and the sweeper wheel and carry out cleaning and gather, effectively improve the sludge cleaning efficiency and quality, prevent the stubborn sludge from continuing to remain and deposit in the bottom of the tank, the utility model discloses the dredging robot effectively improves the sludge cleaning quality and efficiency, alleviates the burden of worker operation, improves the deposition tank cleaning speed, reduces the probability of water disaster occurrence, and has very important practical significance to guarantee mine safety production. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is the perspective view of the utility model;

[0034] Figure 2 It is the side view of the utility model;

[0035] Figure 3The utility model discloses a machine body internal structure bottom view;

[0036] Figure 4 The utility model discloses a machine body internal structure plan view;

[0037] Figure 5 The utility model discloses a silt suction pump structure diagram shows,

[0038] Figure 6 The utility model discloses a crushing mechanism external structure diagram shows,

[0039] Figure 7 The utility model discloses a crushing mechanism internal structure diagram shows,

[0040] Figure 8 The utility model discloses an arm support, sweep wheel, spiral reamer, telescopic mechanism and power mechanism assembly diagram shows, Figure 1 ;

[0041] Figure 9 The utility model discloses an arm support, sweep wheel, spiral reamer, telescopic mechanism and power mechanism assembly diagram shows, Figure 2 ;

[0042] Figure 10 The utility model discloses a auxiliary silt shoveling mechanism structure diagram shows,

[0043] Among them, 1-machine body, 10-inspection opening,

[0044] 2-track type drive mechanism: 21-rear wheel, 22-front wheel, 23-track,

[0045] 211-first drive motor, 212-driving gear, 213-driven gear, 214-first transmission shaft, 215-second transmission shaft,

[0046] 3-arm support, 41-scoop,

[0047] 42-auxiliary silt shoveling mechanism: 421-second hydraulic cylinder, 422-arc shovel, 423-assistant walking wheel,

[0048] 51-sweep wheel, 52-spiral reamer,

[0049] 6-telescopic mechanism: 61-first hydraulic cylinder, 62-mounting frame,

[0050] 7-power mechanism: 71-second drive motor, 72-driving sprocket, 73-first transmission chain, 74-first driven sprocket, 75-second driven sprocket, 76-second transmission chain, 77-third driven sprocket,

[0051] 81-feeding pipe, 82-silt suction pump, 821-feeding end, 822-discharge end, 83-discharge pipe,

[0052] 9 - pulverizing mechanism: 91 - pulverizing cavity, 911 - feeding port, 92 - third driving motor, 93 - pulverizing shaft, 94 - pulverizing block, 95 - blade. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0054] In the utility model, unless another explicit provision and limitation, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, can also be detachable connection, or be integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be the communication inside two elements or the interaction relationship of two elements, unless another explicit limitation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0055] Combination Figures 1 to 10 As shown in the figure, the utility model provides a kind of underground pre-deposition pool dredging robot, the dredging robot can clean the silt accumulated in underground pre-deposition pool, can reduce the labor intensity of worker, effectively improve the cleaning efficiency of cleaning deposition pool, improve deposition pool cleaning speed, reduce the probability of water disaster occurrence.The dredging robot mainly includes body 1, caterpillar drive mechanism 2, arm support 3, bucket 41, sweeping wheel 51, spiral reamer 52, telescopic mechanism 6, power mechanism 7, suction dredging pump 82, pulverizing mechanism 9 and recycling box and the like structural components.

[0056] Combination Figures 1 to 4 As shown in the figure, the two sides of body 1 are provided with caterpillar drive mechanism 2, for driving body 1 movement.Caterpillar drive mechanism 2 includes first driving motor 211, driving gear 212, driven gear 213, first transmission shaft 214, second transmission shaft 215, rear wheel 21, front wheel 22 and caterpillar 23 and the like structural components.

[0057] The first driving motor 211 is fixedly installed in the inside of the body 1, and the output shaft of the first driving motor 211 is connected to the middle position of the driving gear 212, the driving gear 212 is engaged with the driven gear 213, the middle position of the driven gear 213 is fixedly connected with the first transmission shaft 214, the first transmission shaft 214 is rotatably connected with the body 1, and the two ends of the first transmission shaft 214 are fixedly connected with the rear wheels 21, the middle part of the front wheels 22 opposite to each other is fixedly connected with the second transmission shaft 215, the second transmission shaft 215 is rotatably connected with the body 1, and the caterpillar belts 23 are arranged between the front wheels 22 and the rear wheels 21 corresponding to the sides of the body 1. The utility model discloses through the first driving motor 211 provides power and drives the rear wheel 21 to rotate, simultaneously, the front wheel 22 follows rotation, and the caterpillar belt 23 rotates under the drive of the front wheel 22 and the rear wheel 21, thereby completing the movement of the body 1.

[0058] The body 1 adopts the caterpillar drive mechanism 2, so that the robot can move stably in the pre-deposition tank.

[0059] As shown in Figure 1 and Figure 2 , the front end of the body 1 is connected with the scraper 41 through the arm support 3, and a plurality of sweeping wheels 51 are arranged in the inside of the scraper 41 through a sweeping wheel shaft, the sweeping wheel 51 is used for sweeping and gathering the sludge and sundries cut by the spiral reamer 52 into the scraper 41, so that the sludge can be sucked and recycled by the sludge suction pump 82.

[0060] As shown in Figure 8 and Figure 9 , the front end of the arm support 3 is connected with the spiral reamer 52 through the telescopic mechanism 6. The telescopic mechanism 6 is used for adjusting the arrangement angle of the spiral reamer 52, so that the sludge can be effectively cut. The telescopic mechanism 6 mainly comprises a first hydraulic cylinder 61 and a mounting bracket 62 and the like structural components. The two sides of the mounting bracket 62 are connected with the two sides of the arm support 3, the cylinder body end of the first hydraulic cylinder 61 is connected with the arm support 3, and the telescopic end of the first hydraulic cylinder 61 is connected with the mounting bracket 62. The spiral reamer 52 is connected with the mounting bracket 62 through a reamer shaft. The mounting bracket 62 is driven to swing clockwise or counterclockwise relative to the arm support 3 by the first hydraulic cylinder 61, and the spiral reamer 52 arranged in the inside of the mounting bracket 62 can also swing with the mounting bracket 62, so that the sludge at the bottom of the pre-deposition tank can be cut and recycled.

[0061] As shown in Figure 9As shown, the spiral reamer 52 and the sweeping wheel 51 are both provided with a power mechanism 7 for driving the spiral reamer 52 and the sweeping wheel 51 to rotate. The power mechanism 7 mainly comprises a second driving motor 71, a driving sprocket 72, a first transmission chain 73, a first driven sprocket 74, a second driven sprocket 75, a second transmission chain 76, and a third driven sprocket 77.

[0062] The cylinder end of the second driving motor 71 is connected with the arm support 3, and the output shaft of the second driving motor 71 is fixedly connected with the middle position of the driving sprocket 72. The driving sprocket 72 is connected with the first driven sprocket 74 through the first transmission chain 73, the middle position of the first driven sprocket 74 is fixedly connected with the end of the sweeping wheel shaft, and a plurality of sweeping wheels 51 are arranged on the sweeping wheel shaft. The end of the sweeping wheel shaft is also provided with the second driven sprocket 75, the second driven sprocket 75 is connected with the third driven sprocket 77 through the second transmission chain 76, the middle position of the third driven sprocket 77 is fixedly connected with the end of the reamer shaft, and the spiral reamer 52 is arranged on the reamer shaft.

[0063] The power mechanism 7 drives the driving sprocket 72 to rotate through the second driving motor 71, the first driven sprocket 74 rotates synchronously with the sweeping wheel shaft, and the sweeping wheel can rotate; at the same time, the second driven sprocket 75 rotates with the sweeping wheel shaft, the third driven sprocket 77 rotates synchronously, and finally the reamer shaft can drive the spiral reamer 52 to rotate.

[0064] As shown in Figure 3 As shown in Figure 4 As shown, the suction pump 82 is arranged in the machine body 1, the inlet end 821 of the suction pump 82 is connected with the inside of the bucket 41 through the inlet pipe 81, and the suction pump 82 can suck the recovered silt in the bucket 41 into the machine body 1 for further crushing treatment. Figure 4 As shown, the outlet end 822 of the suction pump 82 is connected with the crushing mechanism 9 through the outlet pipe 83, and the crushing mechanism 9 is arranged in the machine body 1 and used for crushing the large stone or coal dust and other impurities mixed in the silt, so that the carrying capacity of the recovery box can be improved, and the subsequent centralized recovery and treatment of the silt is facilitated.

[0065] As shown in Figure 6 As shown in Figure 7As shown, the crushing mechanism 9 includes crushing cavity 91, third drive motor 92, reducer, crushing shaft 93, crushing block 94 and blade 95 and other structural components. The crushing cavity 91 is provided in the inside of the body 1, the side wall of the crushing cavity 91 is provided with a feeding port 911, and the bottom of the crushing cavity 91 is provided with a discharge port. The cylinder end of the third drive motor 92 is connected with the body 1, and the output shaft of the third drive motor 92 is connected with the end of the crushing shaft 93 through the reducer, wherein the crushing shaft 93 is horizontally arranged in the inside of the crushing cavity 91. A plurality of crushing blocks 94 and blades 95 are arranged on the crushing shaft 93, wherein the outer contour of the crushing block 94 is T-shaped, and the outer contour of the blade 95 is spiral-shaped. The crushing block 94 and the blade 95 rotate with the crushing shaft 93 and can crush the large stone and other impurities in the sludge. The crushing mechanism 9 provided by the utility model is driven by the third drive motor 92 to drive the crushing block 94 and the blade 95 to rotate with the crushing shaft 93, so that the impurities mixed in the sludge can be crushed, the sludge carrying capacity of the recovery box can be relatively improved, and the sludge can be conveniently collected and recycled later.

[0066] In combination Figure 1 As shown, the top of the body 1 is provided with an access hole 10, wherein the access hole 10 is located directly above the crushing mechanism 9, facilitating the maintenance or inspection of the crushing mechanism 9.

[0067] The inside of the body 1 and below the crushing mechanism 9 is provided with a recovery box for storing the sludge and other impurities after crushing, wherein the sludge can be used to fill the gaps around the mine roadway ground or the building, thereby increasing the stability and supporting force, and can also be used to manufacture bricks, tiles or other building materials, so it is necessary to crush large stone and other impurities for subsequent recycling and use.

[0068] In combination Figure 2 And Figure 10 As shown, the arm support 3 is provided below with an auxiliary sludge shoveling mechanism 42, which is used for shoveling the stubborn sludge accumulated at the bottom of the sedimentation tank, improving the efficiency and quality of sludge cleaning. The auxiliary sludge shoveling mechanism 42 mainly includes a second hydraulic cylinder 421, an arc-shaped shovel 422 and an auxiliary walking wheel 423. The cylinder end of the second hydraulic cylinder 421 is connected with the arm support 3, the telescopic end of the second hydraulic cylinder 421 is connected with the end of the arc-shaped shovel 422, and the second hydraulic cylinder 421 can drive the arc-shaped shovel 422 to extend to the front end of the body 1, so that the arc-shaped shovel 422 can shovel the stubborn sludge accumulated at the bottom of the pre-sedimentation tank, prevent the stubborn sludge from remaining in the sedimentation tank, and be processed by the spiral reamer 52 and the sweeping wheel 51, effectively improving the efficiency and quality of sludge cleaning. The auxiliary walking wheel 423 is arranged below the second hydraulic cylinder 421, so that the auxiliary sludge shoveling mechanism 42 can move with the body 1.

[0069] In combinationFigures 1 to 10 As shown, the dewatering robot is provided with the telescopic mechanism 6 at the front end of the machine body 1 to drive the spiral reamer 52 to swing relative to the arm support 3, complete the rotary cutting operation on the sludge at the bottom of the underground pre-deposition tank, and gather the rotary cut sludge to the inside of the bucket 41 through the sweeper 51, and use the sludge suction pump 82 to suck and recycle the sludge to the inside of the machine body 1; meanwhile, the crushing mechanism 9 is additionally arranged in the machine body 1, which can crush the large impurities such as stones or coal dust mixed in the sludge again, effectively improve the carrying capacity of the recycling box, and facilitate the centralized treatment of the sludge in the later period; the auxiliary sludge shoveling mechanism 42 is additionally arranged, which can shovel the stubborn sludge accumulated at the bottom of the pre-deposition tank, effectively improve the efficiency and quality of sludge cleaning; the dewatering robot effectively improves the quality and efficiency of sludge cleaning, reduces the burden of workers, improves the cleaning speed of the deposition tank, reduces the probability of water damage, and has very important practical significance for ensuring the safety production of the mine.

[0070] Of course, the above-mentioned is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings, or direct / indirect application in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model, and should be protected by the utility model.

Claims

1. A downhole pre-sedimentation tank dewatering robot, characterized in that, The machine body, track driving mechanism, arm support, bucket, sweeper, telescopic mechanism, spiral reamer, power mechanism, suction pump, crushing mechanism and recycling box are included. The track driving mechanism is arranged on both sides of the machine body to drive the machine body to move. The front end of the machine body is connected with the bucket through the arm support, and the bucket is internally provided with a plurality of sweepers. The suction pump is arranged in the machine body, and the suction pump is connected with the inside of the bucket through the feeding pipe. The crushing mechanism is arranged in the machine body to crush sundries mixed in the sludge. The recycling box is arranged in the machine body below the crushing mechanism.

2. The downhole presedimentation tank dewatering robot of claim 1, wherein, The track driving mechanism includes a first driving motor, a driving gear, a driven gear, a first transmission shaft, a second transmission shaft, front wheels, rear wheels and a track. The first driving motor is fixedly installed in the machine body, and the output shaft of the first driving motor is connected with the driving gear.

3. The downhole presedimentation tank dewatering robot of claim 1, wherein, The driving gear is engaged with the driven gear, and the middle position of the driven gear is fixedly connected with the first transmission shaft. The first transmission shaft is rotatably connected with the machine body, and the two ends of the first transmission shaft are fixedly connected with the rear wheels. The middle part of the opposite front wheels is fixedly connected with the second transmission shaft, and the second transmission shaft is rotatably connected with the machine body.

4. The downhole presedimentation tank dewatering robot of claim 3, wherein, The telescopic mechanism includes a mounting frame and a first hydraulic cylinder. The two sides of the mounting frame are connected with the two sides of the arm support. The cylinder end of the first hydraulic cylinder is connected with the arm support, and the telescopic end of the first hydraulic cylinder is connected with the mounting frame. The reamer shaft is connected with the mounting frame.

5. The downhole presedimentation tank dewatering robot of claim 1, wherein, The power mechanism includes a second driving motor, a driving sprocket, a first transmission chain, a first driven sprocket, a second driven sprocket, a second transmission chain and a third driven sprocket. The cylinder end of the second driving motor is connected with the arm support, and the output shaft of the second driving motor is fixedly connected with the middle position of the driving sprocket. The driving sprocket is connected with the first driven sprocket through the first transmission chain. The middle position of the first driven sprocket is fixedly connected with the end of the sweeper shaft. The second driven sprocket is arranged on the sweeper shaft. The second driven sprocket is connected with the third driven sprocket through the second transmission chain. The third driven sprocket is fixedly connected with the end of the reamer shaft. The crushing mechanism includes a crushing cavity, a third driving motor, a speed reducer, a crushing shaft, crushing blocks and blades. The crushing cavity is arranged in the machine body. The sidewall of the crushing cavity is provided with a feeding port, and the bottom of the crushing cavity is provided with a discharging port. The cylinder end of the third driving motor is connected with the machine body. The output shaft of the third driving motor is connected with the end of the crushing shaft through the speed reducer. The crushing shaft is horizontally arranged in the crushing cavity. The crushing shaft is provided with a plurality of crushing blocks and blades.

6. The downhole presedimentation tank dewatering robot of claim 5, wherein, The outer contour of the pulverized block is T-shaped, and the outer contour of the blade is spiral-shaped.

7. The downhole presedimentation tank dewatering robot of claim 5, wherein, A top of the machine body is provided with an inspection opening, wherein the inspection opening is located directly above the pulverizing mechanism.

8. The downhole presedimentation tank dewatering robot of claim 1, wherein, A lower portion of the arm support is provided with an auxiliary silt shoveling mechanism, which comprises an arc-shaped shovel, a second hydraulic cylinder and an auxiliary traveling wheel. A cylinder body end of the second hydraulic cylinder is connected with the arm support, a telescopic end of the second hydraulic cylinder is connected with an end portion of the arc-shaped shovel, and a lower portion of the second hydraulic cylinder is provided with the auxiliary traveling wheel.

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