Sludge removing device for water conservancy project

Abstract

The invention discloses a sludge removing device for a water conservancy project, and relates to the technical field of sludge removing equipment, the sludge removing device comprises a horizontal mounting plate, a base, a crawler belt, an expansion box body, auxiliary wheels, sliding box bodies, an excavator bucket, a sieve plate, a collecting box, a top cover and a vacuum suction pump, an air drying mechanism for air drying of sludge is arranged in the collecting box, and the two sliding box bodies are driven by a sliding mechanism to slide; the two buckets are both driven by the second lifting mechanism to ascend and descend, and the buckets can dig up sludge on the two sides of the equipment under the driving of the second lifting mechanism and the turnover mechanism along with forward movement of the equipment and dump the sludge towards the sliding box body on the rear portion. The sliding box can synchronously get close to the direction of the excavator bucket when the excavator bucket overturns and topples upwards synchronously and is used for receiving sludge, the sieve plate located in the sliding box can be gradually lifted when sliding in the direction away from the excavator bucket along with the sliding box, impurities in the sludge are filtered on the sieve plate, and follow-up absorption is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sludge removing equipment, and in particular to a sludge removing device for water conservancy projects. Background Art

[0002] During the construction of water conservancy projects, the enrichment of silt has become a very big factor hindering water conservancy construction. These silts need to be cleaned up centrally before construction.

[0003] The existing method of cleaning silt is usually to drive the excavation equipment into the riverbed, and use the excavation shovel to transport the excavated silt to the transport vehicle through the lifting equipment. The workload is huge. During the transportation process, there is still a large amount of water in the silt, and the weight of this part of water needs to be borne during the transportation process, which is inefficient. Alternatively, a suction machine is used to directly suck the silt. However, the silt contains a large amount of gravel and other debris, which also needs to be removed during the suction process, otherwise the suction equipment will be damaged, causing certain economic losses.

[0004] In order to solve the above problems, a sludge removing device for water conservancy projects is now proposed. Summary of the invention

[0005] In view of the above problems, the present invention provides a silt removing device for water conservancy projects, which solves the problem that the existing method of cleaning silt is usually to drive excavation equipment into the riverbed, and use the excavated silt to be transported to the transport vehicle through the lifting equipment by the excavating shovel, which involves a huge amount of engineering work. During the transportation process, since there is still a large amount of water in the silt, the weight of this part of water needs to be borne additionally during the transportation process, which is inefficient. Alternatively, a suction machine is used to directly suck the silt. However, the silt contains a large amount of debris and other debris, which also needs to be removed during the suction process, otherwise the suction equipment will be damaged, resulting in certain economic losses.

[0006] The technical solution adopted by the present invention is: comprising an installation box, a vertical installation plate, a horizontal installation plate, a base, a crawler, an expansion box, auxiliary wheels, a sliding box, a bucket, a screen plate, a collection box, a top cover, a first connecting pipe, a second connecting pipe, a third connecting pipe, a vacuum suction pump, a driving mechanism, a first lifting mechanism, a flipping mechanism, a sliding mechanism, a second lifting mechanism, an air drying mechanism, and a cleaning mechanism; Vertical mounting plates are fixedly provided on both sides of the rear end of the mounting box, and a same horizontal mounting plate is fixedly provided between the upper ends of the two vertical mounting plates; A collecting box is provided at the upper end of the horizontal mounting plate, a top cover is fixedly provided at the upper end of the collecting box, and a first end of a first connecting pipe is communicated with the front wall of the collecting box; The collecting box is provided with an air-drying mechanism for air-drying the sludge; An expansion box is fixedly provided on both sides of the installation box, and a sliding box is movably provided in the two expansion boxes, and the two sliding boxes are driven to slide by a sliding mechanism; The two sliding boxes are respectively provided with sieve plates movably disposed therein, and the two sieve plates are driven to rise and fall by the first lifting mechanism, and the two sliding boxes respectively drive the two first lifting mechanisms to work by sliding; The upper ends of the two sieve plates are respectively provided with cleaning mechanisms for cleaning the crushed stones after filtering, and the two cleaning mechanisms are respectively driven to work by the two first lifting mechanisms; Buckets are movably provided on both sides of the installation box, the two buckets are respectively arranged on the front side of the expansion box close thereto, and the two sliding boxes are movably provided on the rear side of the buckets close thereto; The two buckets are driven to rise and fall by a second lifting mechanism, and the sliding mechanism is driven to work by the second lifting mechanism; The two buckets are both driven to flip by a flipping mechanism, and the two buckets are driven to work by lifting and lowering the two flipping mechanisms respectively; The second lifting mechanism is arranged on the upper end of the top wall of the installation box; The air-drying mechanism is driven to work by the second lifting mechanism; A vacuum suction pump is provided below the second end of the first connecting pipe, and an output end of the vacuum suction pump is connected to the first connecting pipe; The input end of the vacuum suction pump is connected to the second connecting pipe through the third connecting pipe, and the third connecting pipe is connected to the middle end of the second connecting pipe; The two ends of the second connecting pipe respectively penetrate the rear wall of the expansion box body close to it and the sliding box body matched therewith to slide and seal each other; The vacuum suction pump is arranged at the upper end of the bottom wall of the installation box; The two sieve plates are movably arranged above the second connecting pipe close thereto; A driving mechanism is arranged on the outer side of the front wall of the vacuum suction pump. The impeller in the vacuum suction pump drives the driving mechanism to work by rotating, and the second lifting mechanism is driven to work by the driving mechanism.

[0007] Furthermore, the second lifting mechanism comprises a first main shaft, a first bevel gear, a second bevel gear, a reciprocating screw, a sliding rod, and a first rectangular sliding block; First rectangular through grooves are respectively provided on the two side walls of the installation box, and first rectangular sliding blocks are respectively slidably provided in the two first rectangular through grooves. The two buckets are respectively rotatably provided on the outer walls of the first rectangular sliding blocks close thereto through first rotating shafts, and the two first rotating shafts are respectively fixedly connected to the buckets close thereto; The inner ends of the two first rotating shafts are respectively rotated to penetrate the first rectangular sliding blocks matched therewith and are respectively provided with a same sliding rod, and gaps are respectively left between the two ends of the sliding rod and the side walls of the installation box body close thereto; A reciprocating screw rod is threadedly penetrated through the middle end of the slide rod, the lower end of the reciprocating screw rod is rotatably disposed on the upper end of the bottom wall of the installation box, and the upper end of the reciprocating screw rod is rotatably penetrated through the top wall of the installation box and fixed with a second bevel gear; The rear side of the second bevel gear is meshed with a first bevel gear; A first expansion mounting plate is fixedly provided on the upper end of the rear wall of the mounting box; The first bevel gear is rotatably arranged on the outer side of the front wall of the first expansion mounting plate through the first main shaft; The first main shaft is driven to rotate by the driving mechanism; The first main shaft drives the air-drying mechanism to work by rotating; The slide bar drives the flipping mechanism and the sliding mechanism to work respectively by sliding.

[0008] Further, the driving mechanism comprises a first sprocket, a second sprocket, and a chain; The impeller in the vacuum suction pump is arranged in the vacuum suction pump through the rotation of the second main shaft; The other end of the second main shaft is rotatably sealed and penetrates the front wall of the housing of the vacuum suction pump and is fixed with a first sprocket; The rear wall of the first expansion mounting plate is provided with a second sprocket through the first main shaft, and the first sprocket and the second sprocket are sleeved and meshed with the same chain on their outer sides.

[0009] Furthermore, the air-drying mechanism comprises a third bevel gear, a fourth bevel gear, air-drying blades, a hot air barrel, and an electric heating wire; A second expansion mounting plate is fixedly provided on the upper end of the side wall of the top cover close to the first expansion mounting plate; The front end of the first main shaft rotates and passes through the second expansion mounting plate and is fixed with a third bevel gear; A fourth bevel gear is meshed with the lower end of the third bevel gear, and the fourth bevel gear is rotatably arranged on the upper end of the top cover via the second rotating shaft; The lower end of the second rotating shaft rotates through the top cover and is fixed with a drying fan blade; The top cover is provided with a plurality of air suction holes for air intake; A hot air barrel is provided below the air-drying fan blades, the hot air barrel is fixedly arranged at the lower end of the bottom wall of the top cover, and the hot air barrel is arranged in the collection box; A plurality of electric heating wires are arranged in the hot air barrel, and the plurality of electric heating wires are arranged below the air-drying fan blades; A plurality of air outlet holes are provided on the bottom wall of the hot air barrel; A sealable opening and closing door is movably provided on the outer wall of the collection box.

[0010] Further, the sliding mechanism comprises a first connecting frame, a first connecting rod, a third main shaft, a second rectangular sliding block, and a second connecting frame; First connecting frames are fixedly provided on both sides of the rear end of the slide rod, and first ends of the first connecting rod are rotatably provided in the two first connecting frames; Second rectangular through grooves are respectively provided on both sides of the installation box, and second rectangular sliding blocks are respectively slidably provided in the two second rectangular through grooves; A third main shaft is fixedly disposed between the two second rectangular sliding blocks; The second ends of the two first connecting rods are rotatably sleeved on the outer sides of the two ends of the third main shaft respectively; Second connecting frames are fixedly provided at the upper ends of the side walls of the sliding box body close to the two side walls of the installation box body, and the outer ends of the third main shafts respectively penetrate the two second rectangular sliding blocks and are fixedly connected to the second connecting frames close thereto.

[0011] Furthermore, the first lifting mechanism comprises a third connecting frame and a second connecting rod; A third connecting frame is fixedly provided on the upper end of the side wall of the sieve plate close to the two side walls of the installation box; The two third connecting frames are respectively arranged on the outer sides of the two second connecting frames; The first ends of the second connecting rods are rotatably arranged in the two third connecting frames respectively; The second ends of the two second connecting rods are rotatably arranged outside the two side walls of the installation box through the third rotating shaft respectively; The two third rotating shafts respectively drive the two cleaning mechanisms to work by rotating.

[0012] Further, the cleaning mechanism comprises a first helical gear, a second helical gear, a rotating barrel, a third connecting rod, a third rectangular sliding block, an L-shaped scraping rod, and a rectangular rod; The outer ends of the two third rotating shafts are respectively fixedly sleeved with first helical gears, and the lower parts of the two first helical gears are respectively meshed with second helical gears; The two second helical gears are respectively rotatably arranged on the rear wall of the expansion box body close thereto through the rotating barrel; The two rotating barrels are respectively rotatably arranged between the rear walls of the expansion box body adjacent thereto; Rectangular through holes are respectively provided on the front walls of the two rotating barrels, and rectangular rods are respectively slidably provided in the two rectangular through holes, and the two rectangular rods are respectively rotatably provided on the rear wall of the sliding box body close thereto through the rotating shaft; The first ends of the third connecting rods are fixedly sleeved on the outer walls of the two rotating shafts, and the front walls of the second ends of the two third connecting rods are rotatably provided with third rectangular sliding blocks through rotating pins; The upper ends of the two sieve plates are respectively slidably provided with a horizontal bar of an L-shaped scraper rod, the vertical bars of the two L-shaped scrapers are respectively provided with a third rectangular through groove, and the two third rectangular sliding blocks are respectively slidably provided in the third rectangular through grooves adjacent thereto; The outer walls of the two expansion boxes are respectively provided with waste frames for containing filtered objects.

[0013] Furthermore, the turnover mechanism comprises a spur gear and a rack plate; The outer sides of the two first rotating shafts are respectively fixedly sleeved with spur gears, and the two spur gears are respectively movably arranged in the two gaps; The front sides of the two spur gears are respectively meshed with rack plates, and the two rack plates are respectively fixed on the inner sides of the two side walls of the installation box; The two rack plates are respectively arranged at the front sides of the first rectangular through slots adjacent thereto.

[0014] Furthermore, a sensor for monitoring the water level is provided in the collection box, and the sensor is provided below the connection point between the first connecting pipe and the collection box.

[0015] Advantages of the present invention: The bucket of the present invention can dig up the silt on both sides of the equipment as the equipment moves forward, driven by the second lifting mechanism and the flipping mechanism, and dump it toward the sliding box at the rear. The sliding box will simultaneously approach the bucket as the bucket flips and dumps upward, so as to receive the silt. The sieve plate inside it will gradually rise as the sliding box slides away from the bucket, filtering the debris in the silt onto the sieve plate to facilitate subsequent absorption. The vacuum suction pump of the present invention will drive the air-drying mechanism in the collection box while absorbing the filtered silt, and all power sources of the equipment come from the vacuum suction pump, which can avoid energy waste while completing multiple tasks and has strong applicability.

[0016] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear schematic diagram of the overall structure of the present invention; Figure 3 It is a side view of the overall structure of the present invention; Figure 4 It is a schematic diagram of the working principle of the first lifting mechanism of the present invention; Figure 5 It is a schematic diagram of the working principle of the turning mechanism of the present invention; Figure 6 It is a schematic diagram of the working principle of the second lifting mechanism of the present invention; Figure 7 This is a schematic diagram of the installation position of the vacuum suction pump of the present invention; Figure 8 It is a schematic diagram of the working principle of the driving mechanism of the present invention; Fig. 9 It is a schematic diagram of the overall structure of the air-drying mechanism of the present invention; Fig.10 This is a schematic diagram of the overall structure of the interior of the installation box of the present invention; Fig.11 This is a schematic diagram of the installation of the top cover and the hot air barrel of the present invention; Fig.12 This is a schematic diagram of the overall structure of the hot air barrel of the present invention; Fig.13 It is a schematic diagram of the overall structure of the cleaning mechanism of the present invention; Fig.14 It is a schematic diagram of the top structure of the cleaning mechanism of the present invention.

[0019] Reference numerals: 1 is the installation box, 2 is the base, 3 is the crawler, 4 is the bucket, 5 is the first bevel gear, 6 is the second bevel gear, 7 is the collection box, 8 is the top cover, 9 is the vertical mounting plate, 10 is the horizontal mounting plate, 11 is the expansion box, 12 is the auxiliary wheel, 13 is the sliding box, 14 is the screen plate, 15 is the first connecting pipe, 16 is the third bevel gear, 17 is the fourth bevel gear, 18 is the first main shaft, 19 is the second sprocket, 20 is the first sprocket, 21 is the first Two connecting rods, 22 is a second rectangular slider, 23 is a reciprocating screw rod, 24 is a sliding rod, 25 is a spur gear, 26 is a rack plate, 27 is a first rectangular slider, 28 is a vacuum suction pump, 29 is an air-drying fan blade, 30 is a first connecting rod, 31 is a third main shaft, 32 is a hot air barrel, 33 is an L-shaped scraper rod, 34 is a third rectangular slider, 35 is a third connecting rod, 36 is a first helical gear, 37 is a second helical gear, 38 is a rotating barrel, and 39 is a rectangular rod; 101 is a first expansion mounting plate, 102 is a second rectangular through slot, and 103 is a first rectangular through slot; 801 is the second expansion mounting plate, and 802 is the air suction hole; 1301 is a second connecting frame; 1401 is a third connecting frame; 1501 is a second connecting pipe, and 1502 is a third connecting pipe; 2401 is a first connecting frame; 2801 is the second main axis; 3201 is the air outlet, 3202 is the heating wire; 3301 is a third rectangular through slot. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] In the description of the invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0022] refer to Figures 1 to 14 , a sludge removal device for water conservancy projects, comprising an installation box 1, a vertical installation plate 9, a horizontal installation plate 10, a base 2, a crawler 3, an expansion box 11, an auxiliary wheel 12, a sliding box 13, a bucket 4, a screen plate 14, a collection box 7, a top cover 8, a first connecting pipe 15, a second connecting pipe 1501, a third connecting pipe 1502, a vacuum suction pump 28, a driving mechanism, a first lifting mechanism, a flipping mechanism, a sliding mechanism, a second lifting mechanism, an air drying mechanism, and a cleaning mechanism; Vertical mounting plates 9 are fixedly mounted on both sides of the rear end of the mounting box 1, and a horizontal mounting plate 10 is fixedly mounted between the upper ends of the two vertical mounting plates 9; The upper end of the horizontal mounting plate 10 is provided with a collecting box 7, the upper end of the collecting box 7 is fixedly provided with a top cover 8, the lower end of the collecting box 7 is provided with a first end of a first connecting pipe 15, the first connecting pipe 15 is arranged through the horizontal mounting plate 10, the horizontal mounting plate 10 is used to support the collecting box 7, and the collecting box 7 is used to collect and store the absorbed sludge; The collecting box 7 is equipped with a drying mechanism for air-drying the sludge, which is used to drain the water in the sludge, reduce the overall quality of the sludge, facilitate transportation and increase the total amount of sludge collected in the collecting box 7; The two sides of the installation box 1 are respectively fixedly installed with expansion boxes 11, and the two expansion boxes 11 are respectively movably installed with sliding boxes 13. The two sliding boxes 13 are driven to slide by the sliding mechanism. The two expansion boxes 11 are used to provide sliding tracks for the sliding boxes 13 matched therewith. The sliding boxes 13 are used to receive the silt transported by the bucket 4 described later. When the bucket 4 is turned upward by the turning mechanism described later, the sliding boxes 11 will be close to the bucket 4 for easy storage. Screen plates 14 are movably installed in the two sliding boxes 13, and the two screen plates 14 are driven to rise and fall by the first lifting mechanism. The two sliding boxes 13 drive the two first lifting mechanisms to work by sliding. When the bucket 4 pours the silt into the sliding box 11, it first contacts the screen plate 14. As the sliding box 11 slides in the direction away from the bucket, the screen plate 14 is lifted upward, and the silt is controlled into the sliding box 11 below, and the debris is filtered and retained above the screen plate 14, so as to achieve separation. Cleaning mechanisms for cleaning the crushed stones after filtration are respectively installed on the upper ends of the two screen plates 14. The screen plates 14 on both sides will be driven respectively as they rise, so that the filtered objects on the screen plates 14 are cleaned in real time to avoid clogging the screen plates 14. Buckets 4 are movably mounted on both sides of the mounting box 1, and the two buckets 4 are respectively mounted on the front sides of the expansion box 11 close thereto, and the two sliding boxes 13 are movably mounted on the rear sides of the buckets 4 close thereto; The two buckets 4 are driven to rise and fall by the second lifting mechanism, and the sliding mechanism is driven to work by the second lifting mechanism; The two buckets 4 are both driven to flip by the flip mechanism. The two buckets 4 drive the two flip mechanisms to work by lifting. The two buckets 4 can dig the silt on both sides of the equipment driven by the second lifting mechanism and the flip mechanism. The second lifting mechanism is installed on the upper end of the top wall of the installation box 1; The air-drying mechanism is driven to work by the second lifting mechanism; A vacuum suction pump 28 is installed below the second end of the first connecting pipe 15. The output end of the vacuum suction pump 28 is connected to the first connecting pipe 15. The input end of the vacuum suction pump 28 is connected to the second connecting pipe 1501 through the third connecting pipe 1502. The third connecting pipe 1502 is connected to the middle of the second connecting pipe 1501, so that both ends of the second connecting pipe 1501 can be sucked at the same time. The two ends of the second connecting pipe 1501 are respectively penetrated through the rear wall of the expansion box 11 close to it and the sliding box 13 matched therewith for sliding sealing installation. The sliding sealing is realized by using sliding seals. The two second connecting pipes 1501, under the action of the vacuum suction pump 28, suck the filtered sludge from the two sliding boxes 11 into the first connecting pipe 15, and finally suck it into the collection box 7 above to realize storage; The two sieve plates 14 are movably mounted above the second connecting pipe 1501 adjacent thereto; A driving mechanism is installed on the outer side of the front wall of the vacuum suction pump 28. The impeller in the vacuum suction pump 28 drives the driving mechanism to work by rotating, and the second lifting mechanism is driven to work by the driving mechanism. When the vacuum suction pump 28 is working, the impeller inside it usually starts to rotate, and the power of the impeller rotation is transmitted to the driving mechanism, so that the driving mechanism can provide a certain additional driving force to the second lifting mechanism, which greatly improves the energy utilization rate; Two auxiliary wheels 12 for assisting driving are respectively installed on the outer walls of the two expansion boxes 11. Their function is to assist the equipment to move forward, increase the contact area between the equipment and the ground, and increase the overall stability of the equipment. The auxiliary wheels 12 can also be installed under the expansion box 11 to avoid interference with the waste frame described later.

[0023] The second lifting mechanism comprises a first main shaft 18, a first bevel gear 5, a second bevel gear 6, a reciprocating screw rod 23, a slide rod 24, and a first rectangular slide block 27; The two side walls of the installation box 1 are respectively provided with first rectangular through grooves 103, and first rectangular sliders 27 are respectively slidably installed in the two first rectangular through grooves 103. The two buckets 4 are respectively rotatably installed on the outer walls of the first rectangular sliders 27 close thereto through the first rotating shafts, and the two first rotating shafts are respectively fixedly connected to the buckets 4 close thereto; The inner ends of the two first rotating shafts are respectively rotated to penetrate the first rectangular slider 27 matched therewith and are rotatably mounted with the same slide bar 24, and gaps are respectively left between the two ends of the slide bar 24 and the side walls of the installation box 1 close thereto; The middle end of the slide rod 24 is threadedly penetrated with a reciprocating screw rod 23, the lower end of the reciprocating screw rod 23 is rotatably mounted on the upper end of the bottom wall of the mounting box 1, and the upper end of the reciprocating screw rod 23 is rotatably penetrated with the top wall of the mounting box 1 and fixedly mounted with a second bevel gear 6; The first bevel gear 5 is meshedly mounted on the rear side of the second bevel gear 6; A first expansion mounting plate 101 is fixedly mounted on the upper end of the rear wall of the mounting box 1; The first bevel gear 5 is rotatably mounted on the outer side of the front wall of the first extended mounting plate 101 through the first main shaft 18; The first main shaft 18 is driven to rotate by the driving mechanism; The first main shaft 18 drives the air-drying mechanism to work by rotating; The slide bar 24 drives the flipping mechanism and the sliding mechanism to work respectively by sliding. The first main shaft 18 starts to rotate under the drive of the driving mechanism, and drives the first bevel gear 5 coaxially installed therewith during the rotation process, so that the first bevel gear 5 starts to rotate. The first bevel gear 5 drives the second bevel gear 6 meshing therewith during the rotation process, so that the second bevel gear 6 starts to rotate. The second bevel gear 6 drives the reciprocating screw 23 coaxially installed therewith to start rotating during the rotation process. The reciprocating screw 23 drives the slide bar 24 threadedly penetrated therewith to start sliding up and down during the rotation process. During the up and down sliding process of the slide bar 24, the first rectangular sliders 27 located at both ends thereof start to slide up and down along the first rectangular through grooves 103 on both sides. The bucket 4 located on both sides, which is rotatably connected to the two first rectangular sliders 27, now has the ability to slide up and down. When sliding downward, it can ensure that the bucket can be smoothly shoveled into the bottom of the silt, and the silt can be smoothly dug up with the flipping mechanism described later.

[0024] The driving mechanism comprises a first sprocket 20, a second sprocket 19, and a chain; The impeller in the vacuum suction pump 28 is rotatably mounted in the vacuum suction pump 28 via the second main shaft 2801; The other end of the second main shaft 2801 is rotatably sealed and penetrates the front wall of the housing of the vacuum suction pump 28, and the first sprocket 20 is fixedly installed; The rear wall of the first extended mounting plate 101 is installed with a second sprocket 19 through the first main shaft 18. The first sprocket 20 is meshed with the outer sleeve of the second sprocket 19 and is installed with the same chain. The impeller inside the vacuum suction pump 28 will start to rotate when it is started. This is the prior art. The vacuum suction pump 28 is also a conventional suction pump on the market. The second main shaft 2801 fixedly connected to the impeller will rotate synchronously with the impeller and drive the first sprocket 20 coaxially installed therewith during the rotation. During the rotation, the first sprocket 20 transmits the rotational driving force to the second sprocket 19 through the chain. The second sprocket 19 can drive the first main shaft 18 to rotate by rotating.

[0025] The air drying mechanism comprises a third bevel gear 16, a fourth bevel gear 17, air drying blades 29, a hot air barrel 32, and an electric heating wire 3202; A second expansion mounting plate 801 is fixedly mounted on the upper end of the side wall of the top cover 8 close to the first expansion mounting plate 101; The front end of the first main shaft 18 rotates through the second expansion mounting plate 801 and is fixedly mounted with the third bevel gear 16; The lower end of the third bevel gear 16 is meshed with a fourth bevel gear 17, and the fourth bevel gear 17 is rotatably mounted on the upper end of the top cover 8 via a second rotating shaft; The lower end of the second rotating shaft rotates through the top cover 8 and is fixedly mounted with a drying fan blade 29; The top cover 8 is provided with a plurality of air suction holes 802 for exhausting air; A hot air barrel 32 is installed below the air-drying blades 29. The hot air barrel 32 is fixedly installed at the lower end of the bottom wall of the top cover 8. The hot air barrel 32 is installed in the collection box 7. A plurality of electric heating wires 3202 are installed in the hot air barrel 32, and the plurality of electric heating wires 3202 are installed below the air-drying blades 29; A plurality of air outlet holes 3201 are provided on the bottom wall of the hot air barrel 32; A sealable opening and closing door is movably installed on the outer wall of the collecting box 7. During the rotation of the first main shaft 18, it will drive the third bevel gear 16 installed coaxially therewith, so that the third bevel gear 16 starts to rotate. During the rotation of the third bevel gear 16, it can drive the fourth bevel gear 17 installed in meshing relationship therewith. The fourth bevel gear 17 drives the air-drying blades 29 installed coaxially therewith to start rotating. The air-drying blades 29 accelerate the air flow speed in the collecting box 7 through rotation, and discharge the air through a number of air suction holes 802, thereby accelerating the air-drying speed of the sludge in the collecting box 7. At the same time, since the wind blown by the air-drying blades 29 is heated by the electric heating wire 3202, the wind blown to the collecting box 7 has a certain temperature, thereby further accelerating the air-drying efficiency. Preferably, the rotation speed of the air-drying blades 29 can be increased by adding a gearbox between the third bevel gear 16 and the fourth bevel gear 17 which are meshing with each other.

[0026] The sliding mechanism comprises a first connecting frame 2401, a first connecting rod 30, a third main shaft 31, a second rectangular sliding block 22, and a second connecting frame 1301; First connecting frames 2401 are fixedly installed on both sides of the rear end of the slide rod 24, and the first ends of the first connecting rod 30 are rotatably installed in the two first connecting frames 2401; Second rectangular through grooves 102 are respectively provided on both sides of the installation box 1, and second rectangular sliding blocks 22 are respectively slidably installed in the two second rectangular through grooves 102; The same third main shaft 31 is fixedly installed between the two second rectangular sliders 22; The second ends of the two first connecting rods 30 are rotatably sleeved on the outer sides of the two ends of the third main shaft 31 respectively; The second connecting frames 1301 are fixedly installed on the upper ends of the side walls of the sliding box 13 near the two side walls of the installation box 1, and the outer ends of the third main shaft 31 pass through the two second rectangular sliders 22 and are fixedly connected to the second connecting frames 1301 near them. The sliding rod 24 drives the first connecting rods 30 on both sides to start to deflect up and down during the up and down sliding process. The first connecting rods 30 on both sides simultaneously drive the third main shaft 31 to start sliding forward and backward during the up and down deflection process. Fig.10In the process of sliding back and forth, the third main shaft 31 drives the second rectangular sliders 22 at both ends to start sliding back and forth along the second rectangular through grooves 102 on both sides. In the process of sliding back and forth, the two second rectangular sliders 22 drive the third connecting frames 1301 matched therewith to start sliding back and forth. At this time, the sliding box 13 fixedly connected to the two third connecting frames 1301 has the ability to slide back and forth.

[0027] The first lifting mechanism comprises a third connecting frame 1401 and a second connecting rod 21; The third connecting frames 1401 are fixedly mounted on the upper ends of the side walls of the sieve plates close to the two side walls of the installation box 1; The two third connecting frames 1401 are respectively installed on the outer sides of the two second connecting frames 1301; The first ends of the second connecting rods 21 are rotatably mounted in the two third connecting frames 1401 respectively; The second ends of the two second connecting rods 21 are respectively rotatably mounted on the outside of the two side walls of the mounting box 1 through the third rotating shaft, and the two third rotating shafts respectively drive the two cleaning mechanisms to work by rotating. Figure 4 When the two sliding boxes 13 slide in the direction away from the bucket 4, the screen plate 14 located inside thereof will also slide in the direction away from the bucket 4 along with the sliding box 13, and at this time, the second connecting rods 21 on both sides begin to rotate upward. Since the rotation center of the second connecting rods 21 on both sides has been determined, the two second connecting rods 21 will respectively pull the third connecting frames 1401 on both sides to start moving upward during the upward rotation process. The screen plate 14 fixedly connected to the two third connecting frames 1401 will then start to move upward, and the sludge on the screen plate 14 will pass through the filter holes on the screen plate 14 and fall into the bottom of the screen plate 14 and be sucked away by the two second connecting pipes 1501, while the debris in the sludge will be retained at the upper end of the screen plate 14 to achieve separation.

[0028] The cleaning mechanism comprises a first helical gear 36, a second helical gear 37, a rotating barrel 38, a third connecting rod 35, a third rectangular sliding block 34, an L-shaped scraping rod 33, and a rectangular rod 39; The outer ends of the two third rotating shafts are respectively fixed with first helical gears 36, and the lower parts of the two first helical gears 36 are respectively meshed with second helical gears 37; The two second helical gears 37 are respectively rotated by the rotating barrels 38 and are arranged on the rear wall of the expansion box 11 close thereto; The two rotating barrels 38 are respectively rotatably arranged between the rear walls of the expansion box 11 adjacent thereto; Rectangular through holes are respectively provided on the front walls of the two rotating barrels 38, and rectangular rods 39 are respectively slidably installed in the two rectangular through holes. The two rectangular rods 39 are respectively rotatably arranged on the rear wall of the sliding box 13 close thereto through the rotating shaft; The first ends of the third connecting rods 35 are fixedly mounted on the outer walls of the two rotating shafts, and the third rectangular sliders 34 are rotatably mounted on the front walls of the second ends of the two third connecting rods 35 through rotating pins. The upper ends of the two sieve plates 14 are slidably mounted with the horizontal bars of the L-shaped scraper rods 33, and the vertical bars of the two L-shaped scraper rods 33 are respectively provided with third rectangular through grooves 3301, and the two third rectangular sliding blocks 34 are respectively slidably arranged in the third rectangular through grooves 3301 adjacent thereto; The outer walls of the two expansion boxes 11 are respectively provided with waste frames for holding the filtered material; Fig.13 When the two second connecting rods 21 rotate upward, they will respectively drive the third rotating shafts matched therewith to start rotating. During the rotation process, the two third rotating shafts respectively drive the first helical gears 36 fixedly installed coaxially therewith. The two first helical gears 36 respectively drive the second helical gears 37 meshing therewith through rotation. The first helical gears 36 and the second helical gears 37 are both helical gears with a helical angle of 45°, and the purpose is to enable transmission between mutually staggered and perpendicular axes. The two second helical gears 37 can drive the rotating barrel 38 coaxial therewith to start rotating through the rotation. The rectangular through hole in the rotating barrel 38 drives the rectangular rod 39 matched therewith to start rotating, and since the rectangular rod 39 slides in the rectangular through hole, it will not affect the sliding trajectory of the sliding box 13. The rectangular rod 39 can drive the third connecting rod 35 coaxially fixed therewith to start rotating by rotating. During the rotation of the third connecting rod 35, the third rectangular slider 34 at the other end thereof has a certain rotation tendency, and the movement trajectory of the third rectangular slider 34 during the rotation is limited in the third rectangular through groove 3301. Therefore, the third rectangular slider 34 converts this part of the rotation tendency into the horizontal movement tendency of the L-shaped scraper rod 33, so that the sieve plates 14 on both sides can slide outward along the sieve plates 14 when lifted upward, scraping the filtered material on the sieve plates 14, and scraping the scraped filtered material into the waste frames on both sides, thereby realizing the function of real-time cleaning of the sieve plates 14. Preferably, a brush can be provided at the lower end of the cross bar of the L-shaped scraper rod 33 to facilitate cleaning of debris in the sieve holes of the sieve plates 14.

[0029] The turning mechanism comprises a spur gear 25 and a rack plate 26; The outer sides of the two first rotating shafts are respectively fixedly sleeved with spur gears 25, and the two spur gears 25 are respectively movably installed in the two gaps; The front sides of the two spur gears 25 are respectively meshed with rack plates 26, and the two rack plates 26 are respectively fixedly mounted on the inner sides of the two side walls of the mounting box 1; The two rack plates 26 are respectively mounted on the front side of the first rectangular through slot 102 adjacent thereto, Figure 5When the slide bar 24 starts to slide up and down driven by the reciprocating screw rod 23, the spur gears 25 at both ends thereof also slide up and down with the slide bar 24. The two spur gears 25 are meshed with the rack plates 26 close to them on both sides during the up and down sliding process. Therefore, the two spur gears 25 will also start to rotate during the up and down sliding process. The bucket 4 coaxially fixedly connected to the two spur gears 25 has the ability to rotate at this time. When the bucket 4 moves downward, the front end of the bucket 4 faces the silt, and the head of the bucket 3 just sinks into the silt. When the bucket 4 starts to move upward and starts to rotate upward, the silt will be shoveled into the bucket 4 as the equipment moves. As the equipment continues to move forward, the bucket 4 rotates upward to the limit position and dumps the silt into the sliding box 13 approaching it from the rear, thereby realizing the excavation and collection work.

[0030] A sensor for monitoring the water level is installed in the collection box 7. The sensor is installed below the connection between the first connecting pipe 15 and the collection box 7. Its function is to facilitate the monitoring of the real-time water level in the collection box 7 to prevent the rising water level from blocking the first connecting pipe 15. When the water level submerges the sensor, the equipment needs to be stopped to replace the collection box 7. After the sensor is submerged, it can be transmitted to the alarm outside the equipment through an electrical wire, causing the alarm to start sounding. This is the prior art.

[0031] Implementation method of the present invention: The device is placed in the riverbed area with silt to be cleaned, and the device is controlled to move forward by the control device. During the forward movement of the device, the vacuum suction pump 28 is turned on, and the vacuum suction pump 28 starts to work. While working, the rotating impeller inside the vacuum suction pump 28 transmits the rotational driving force to the driving mechanism; At this time, the driving mechanism drives the second lifting mechanism to start working. The second lifting mechanism drives the buckets 4 on both sides of the equipment to start moving downward, and in the process of moving downward, they start to flip downward under the drive of the flipping mechanism. In this process, the buckets 4 sink into the mud and move with the equipment, shoveling the mud into the bucket 4. The buckets 4 on both sides will be lifted up again as the equipment moves during the flipping process, and flip upward during the lifting process. As the bucket 4 moves upward and turns upward, the sliding boxes 13 on both sides begin to move toward the direction close to the bucket 4, and the bucket 4 finally puts the shoveled silt into the sliding box 13 approaching. As the equipment moves forward again, the bucket 4 begins to move downward while turning downward. In this process, the sliding boxes 13 on both sides move in the direction away from the bucket 4, and the screen plate 14 located inside begins to lift upward during the movement. In the process of the screen plate 14 being lifted upward, the silt falls from the filter holes on the screen plate 14 and is placed inside the sliding box 13, while the debris is retained above the screen plate 14. As the sieve plates 14 on both sides are lifted upward, the L-shaped scraper rods 33 at their upper ends will simultaneously slide outwards to scrape the debris retained on the sieve plates 14 into the waste frame outside the expansion box 11, thereby achieving real-time cleaning.

[0032] As the equipment continues to work, the volume of sludge in the collection box 7 will gradually increase. When the water level rises to a certain height, the sensor will be triggered. The alarm will start to alarm as the sensor transmits the electrical signal, reminding the staff to replace the collection box 7 in time to avoid clogging the connecting pipe connected to it, resulting in inability to continue suction.

[0033] Since the vacuum suction pump 28 provides the driving source for the equipment's working process during the entire process, the vacuum suction pump 28 works synchronously during this process. The filtered sludge in the two sliding boxes 13 is sucked into the third connecting pipe 1502 from the two second connecting pipes 1501, and finally sucked into the collecting box 7 above. The exhaust fan blades 29 in the collecting box 7 will work synchronously at this time, and through the heating wire, the filtered sludge will be air-dried to reduce the moisture in the sludge and reduce the overall quality of the collected sludge.

[0034] The bucket of the present invention can dig up the silt on both sides of the equipment as the equipment moves forward, driven by the second lifting mechanism and the flipping mechanism, and dump it toward the sliding box at the rear. The sliding box will simultaneously approach the bucket as the bucket flips and dumps upward, so as to receive the silt. The sieve plate inside it will gradually rise as the sliding box slides away from the bucket, filtering the debris in the silt onto the sieve plate to facilitate subsequent absorption. The vacuum suction pump of the present invention will drive the air-drying mechanism in the collection box while absorbing the filtered silt, and all power sources of the equipment come from the vacuum suction pump, which can avoid energy waste while completing multiple tasks and has strong applicability.

[0035] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge removal device for water conservancy projects, characterized by comprising: a mounting box (1), a vertical mounting plate (9), a horizontal mounting plate (10), a base (2), a crawler (3), an expansion box (11), an auxiliary wheel (12), a sliding box (13), a bucket (4), a screen plate (14), a collecting box (7), a top cover (8), a first connecting pipe (15), a second connecting pipe (1501), a third connecting pipe (1502), a vacuum suction pump (28), a driving mechanism, a first lifting mechanism, a turning mechanism, a sliding mechanism, a second lifting mechanism, an air drying mechanism, and a cleaning mechanism; Vertical mounting plates (9) are fixedly provided on both sides of the rear end of the mounting box (1), and a same horizontal mounting plate (10) is fixedly provided between the upper ends of the two vertical mounting plates (9); A collecting box (7) is provided at the upper end of the horizontal mounting plate (10), a top cover (8) is fixedly provided at the upper end of the collecting box (7), and a first end of a first connecting pipe (15) is connected to the front wall of the collecting box (7); The collecting box (7) is provided with an air-drying mechanism for air-drying the sludge; An expansion box (11) is fixedly provided on both sides of the installation box (1), and a sliding box (13) is movably provided in each of the two expansion boxes (11), and the two sliding boxes (13) are driven to slide by a sliding mechanism; A sieve plate (14) is movably disposed in each of the two sliding boxes (13); the two sieve plates (14) are driven to rise and fall by a first lifting mechanism; and the two sliding boxes (13) drive the two first lifting mechanisms to work by sliding. The upper ends of the two sieve plates (14) are respectively provided with cleaning mechanisms for cleaning the crushed stones after filtering, and the two cleaning mechanisms are respectively driven to work by the two first lifting mechanisms; Buckets (4) are movably provided on both sides of the installation box (1), the two buckets (4) are respectively arranged on the front side of the expansion box (11) adjacent thereto, and the two sliding boxes (13) are movably provided on the rear side of the buckets (4) adjacent thereto; The two buckets (4) are both driven to rise and fall by a second lifting mechanism, and the sliding mechanism is driven to work by the second lifting mechanism; The two buckets (4) are both driven to flip by a flipping mechanism, and the two buckets (4) drive the two flipping mechanisms to work by lifting and lowering respectively; The second lifting mechanism is arranged on the upper end of the top wall of the installation box (1); The air-drying mechanism is driven to work by the second lifting mechanism; A vacuum suction pump (28) is provided below the second end of the first connecting pipe (15), and an output end of the vacuum suction pump (28) is connected to the first connecting pipe (15); The input end of the vacuum suction pump (28) is connected to the second connecting pipe (1501) via a third connecting pipe (1502), and the third connecting pipe (1502) is connected to the middle end of the second connecting pipe (1501); The two ends of the second connecting pipe (1501) respectively penetrate the rear wall of the expansion box (11) adjacent thereto and are provided with a sliding seal between the sliding box (13) matched thereto; The vacuum suction pump (28) is arranged at the upper end of the bottom wall of the installation box (1); The two sieve plates (14) are movably disposed above the second connecting pipe (1501) adjacent thereto; A driving mechanism is provided on the outer side of the front wall of the vacuum suction pump (28); the impeller in the vacuum suction pump (28) drives the driving mechanism to operate by rotating, and the second lifting mechanism is driven to operate by the driving mechanism.

2. The silt removal device for water conservancy projects according to claim 1 is characterized by: The second lifting mechanism comprises a first main shaft (18), a first bevel gear (5), a second bevel gear (6), a reciprocating screw (23), a sliding rod (24), and a first rectangular sliding block (27); The two side walls of the installation box (1) are respectively provided with first rectangular through grooves (103), and first rectangular sliding blocks (27) are respectively slidably provided in the two first rectangular through grooves (103). The two buckets (4) are respectively rotatably provided on the outer walls of the first rectangular sliding blocks (27) adjacent thereto via first rotating shafts, and the two first rotating shafts are respectively fixedly connected to the buckets (4) adjacent thereto; The inner ends of the two first rotating shafts are respectively rotated to penetrate the first rectangular sliding blocks (27) matched therewith and are respectively provided with a same sliding rod (24), and gaps are respectively left between the two ends of the sliding rod (24) and the side walls of the installation box (1) adjacent thereto; A reciprocating screw rod (23) is threadedly penetrated at the middle end of the slide rod (24); the lower end of the reciprocating screw rod (23) is rotatably mounted on the upper end of the bottom wall of the installation box (1); and the upper end of the reciprocating screw rod (23) is rotatably penetrated through the top wall of the installation box (1) and is fixedly provided with a second bevel gear (6); The rear side of the second bevel gear (6) is meshed with a first bevel gear (5); A first expansion mounting plate (101) is fixedly provided on the upper end of the rear wall of the mounting box (1); The first bevel gear (5) is rotatably arranged on the outer side of the front wall of the first expansion mounting plate (101) via a first main shaft (18); The first main shaft (18) is driven to rotate by the driving mechanism; The first main shaft (18) drives the air-drying mechanism to work by rotating; The slide bar (24) drives the flipping mechanism and the sliding mechanism to work respectively by sliding.

3. The silt removal device for water conservancy projects according to claim 2 is characterized by: The driving mechanism comprises a first sprocket (20), a second sprocket (19), and a chain; The impeller in the vacuum suction pump (28) is arranged in the vacuum suction pump (28) and is rotated by the second main shaft (2801); The other end of the second main shaft (2801) is rotatably sealed and penetrates the front wall of the housing of the vacuum suction pump (28), and a first sprocket (20) is fixedly provided thereon; A second sprocket (19) is provided on the rear wall of the first expansion mounting plate (101) via a first main shaft (18); the first sprocket (20) and the second sprocket (19) are sleeved and meshed with each other on the outer sides thereof and are provided with a same chain.

4. The silt removal device for water conservancy projects according to claim 3 is characterized by: The air-drying mechanism comprises a third bevel gear (16), a fourth bevel gear (17), air-drying fan blades (29), a hot air barrel (32), and an electric heating wire (3202); A second expansion mounting plate (801) is fixedly provided on the upper end of the side wall of the top cover (8) close to the first expansion mounting plate (101); The front end of the first main shaft (18) rotates through the second expansion mounting plate (801) and is fixedly provided with a third bevel gear (16); A fourth bevel gear (17) is meshed with the lower end of the third bevel gear (16), and the fourth bevel gear (17) is rotatably arranged on the upper end of the top cover (8) via a second rotating shaft; The lower end of the second rotating shaft rotates through the top cover (8) and is fixed with a drying fan blade (29); The top cover (8) is provided with a plurality of air suction holes (802) for air intake; A hot air barrel (32) is provided below the air-drying fan blades (29); the hot air barrel (32) is fixedly mounted on the lower end of the bottom wall of the top cover (8); and the hot air barrel (32) is disposed in the collection box (7); A plurality of electric heating wires (3202) are arranged in the hot air barrel (32), and the plurality of electric heating wires (3202) are all arranged below the air-drying fan blades (29); A plurality of air outlet holes (3201) are provided on the bottom wall of the hot air barrel (32); A sealable opening and closing door is movably provided on the outer wall of the collection box (7).

5. The silt removal device for water conservancy projects according to claim 2 is characterized by: The sliding mechanism comprises a first connecting frame (2401), a first connecting rod (30), a third main shaft (31), a second rectangular sliding block (22), and a second connecting frame (1301); First connecting frames (2401) are fixedly provided on both sides of the rear end of the sliding rod (24), and first ends of the first connecting rod (30) are rotatably provided in the two first connecting frames (2401); Second rectangular through grooves (102) are respectively provided on two sides of the installation box (1), and second rectangular sliding blocks (22) are respectively slidably provided in the two second rectangular through grooves (102); A third main shaft (31) is fixedly disposed between the two second rectangular slide blocks (22); The second ends of the two first connecting rods (30) are rotatably sleeved on the outer sides of two ends of the third main shaft (31); Second connecting frames (1301) are fixedly provided at the upper ends of the side walls of the sliding box (13) close to the two side walls of the installation box (1), and the outer ends of the third main shaft (31) respectively penetrate the two second rectangular sliding blocks (22) and are fixedly connected to the second connecting frames (1301) close thereto.

6. The silt removal device for water conservancy projects according to claim 5 is characterized by: The first lifting mechanism comprises a third connecting frame (1401) and a second connecting rod (21); Third connecting frames (1401) are fixedly provided on the upper ends of the side walls of the sieve plate close to the two side walls of the installation box (1); The two third connecting frames (1401) are respectively arranged on the outsides of the two second connecting frames (1301); The first ends of the second connecting rods (21) are rotatably disposed in the two third connecting frames (1401) respectively; The second ends of the two second connecting rods (21) are rotatably arranged outside the two side walls of the installation box (1) respectively through a third rotating shaft; The two third rotating shafts respectively drive the two cleaning mechanisms to work by rotating.

7. The silt removal device for water conservancy projects according to claim 6 is characterized by: The cleaning mechanism comprises a first helical gear (36), a second helical gear (37), a rotating barrel (38), a third connecting rod (35), a third rectangular sliding block (34), an L-shaped scraping rod (33), and a rectangular rod (39); The outer ends of the two third rotating shafts are respectively fixedly sleeved with first helical gears (36), and the lower parts of the two first helical gears (36) are respectively meshed with second helical gears (37); The two second helical gears (37) are respectively rotated by means of a rotating barrel (38) and are arranged on the rear wall of the expansion box (11) adjacent thereto; The two rotating barrels (38) are respectively arranged to rotate and penetrate between the rear walls of the expansion box (11) adjacent thereto; Rectangular through holes are respectively provided on the front walls of the two rotating barrels (38), rectangular rods (39) are respectively slidably provided in the two rectangular through holes, and the two rectangular rods (39) are respectively rotatably provided on the rear wall of the sliding box (13) adjacent thereto via a rotating shaft; The first ends of the third connecting rods (35) are fixedly sleeved on the outer walls of the two rotating shafts, and the second ends of the two third connecting rods (35) are rotatably provided with third rectangular sliding blocks (34) via rotating pins. The upper ends of the two sieve plates (14) are respectively slidably provided with a cross bar of an L-shaped scraper rod (33), the vertical bars of the two L-shaped scraper rods (33) are respectively provided with a third rectangular through groove (3301), and the two third rectangular sliding blocks (34) are respectively slidably provided in the third rectangular through groove (3301) adjacent thereto; The outer walls of the two expansion boxes (11) are respectively provided with waste frames for containing filtered materials.

8. The silt removal device for water conservancy projects according to claim 2 is characterized by: The turning mechanism comprises a spur gear (25) and a rack plate (26); The outer sides of the two first rotating shafts are respectively fixedly sleeved with spur gears (25), and the two spur gears (25) are respectively movably arranged in the two gaps; The front sides of the two spur gears (25) are respectively meshed with rack plates (26), and the two rack plates (26) are respectively fixed on the inner sides of the two side walls of the installation box (1); The two rack plates (26) are respectively arranged on the front side of the first rectangular through slot (102) adjacent thereto.

9. The silt removal device for water conservancy projects according to claim 4 is characterized by: A sensor for monitoring the water level is provided in the collection box (7), and the sensor is provided below the connection point between the first connecting pipe (15) and the collection box (7).

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