CN209906384U

CN209906384U - Air floatation machine for sewage treatment

Info

Publication number: CN209906384U
Application number: CN201920327008.7U
Authority: CN
Inventors: 梁洪杰
Original assignee: Shaoxing Green Environment Polytron Technologies Inc
Current assignee: Shaoxing Green Environment Polytron Technologies Inc
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-01-07
Anticipated expiration: 2029-03-14

Abstract

The utility model discloses an air-floating machine for sewage treatment, which comprises a machine case with a water outlet, wherein the machine case is sequentially divided into a uniform stirring area, a bubble generation area, an oxygenation area, a bubble generation area and an oxygenation area along the length direction of the machine case; a partition plate is arranged between the uniform stirring area and the bubble generation area; the uniform stirring area comprises an upper layer and a lower layer, and a filter screen cup is arranged between the upper layer and the lower layer; the size of the filtering holes in one surface of the filter screen cup above the partition plate is smaller than the sizes of the filtering holes in the other three surfaces and the bottom of the filter screen cup; a fixing component for fixing the position of the filter screen cup is arranged on the side wall of the top of the case; and the top of the case is provided with an adsorption device. The utility model discloses rational in infrastructure carries out preliminary filtration along with sewage, makes impurity can strain for the first time, guarantees that the sewage that gets into the air supporting operation only has some suspended solids and pollutant, makes the regional sediment of air supporting operation reduce, has prevented blocking phenomenon's emergence.

Description

Air floatation machine for sewage treatment

Technical Field

The utility model relates to an environmental protection equipment technical field, in particular to air supporting machine for sewage treatment.

Background

The air floating machine is water treatment equipment which generates a large amount of micro bubbles in water by an air dissolving system, leads air to be attached to suspended particles in a highly dispersed micro bubble form to cause the state that the density is less than that of the water, and leads the air to float on the water surface by utilizing the buoyancy principle, thereby realizing solid-liquid separation.

The existing air floatation machine has the defects that for example, sewage is not filtered before entering the air floatation machine, so that some large particles exist in the sewage, a material receiving groove and a water inlet can be blocked after deposition, the sewage after impurity removal cannot be discharged, and waste residues cannot be discharged from the material receiving groove.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air supporting machine for sewage treatment carries out preliminary filtration along with sewage, makes impurity can strain for the first time, guarantees that the sewage that gets into the air supporting operation only has some suspended solids and pollutant, makes the sediment reduction of air supporting operation area, has prevented blocking phenomenon's emergence.

The above technical purpose of the present invention can be achieved by the following technical solutions:

an air floatation machine for sewage treatment comprises a case with a water outlet, wherein a plurality of support legs are arranged below the case, and the case is sequentially divided into a uniform stirring area, a bubble generation area I, an oxygen increasing area I, a bubble generation area II and an oxygen increasing area II along the length direction of the case; a partition plate is arranged between the uniform stirring area and the bubble generation area; the uniform stirring area comprises an upper layer and a lower layer, and a filter screen cup is arranged between the upper layer and the lower layer; a placing table is arranged on the case wall in the uniform stirring area, and the height of the placing table is the same as that of the partition plate; the bottom of the filter screen cup is respectively arranged on the placing table and the top of the partition board; the size of the filtering holes in one surface of the filter screen cup above the partition plate is smaller than the sizes of the filtering holes in the other three surfaces and the bottom of the filter screen cup; the first bubble generation area and the second bubble generation area have the same structure, and the first oxygen increasing area and the second oxygen increasing area have the same structure; and the top of the case is provided with an adsorption device.

By adopting the technical scheme, because the initial sewage has larger-particle impurities, the air floatation operation is directly carried out on the sewage, the water outlet and waste residues are blocked by the sedimentation easily, so that larger particles are firstly filtered out at the bottom of the filter screen cup, then secondary small particle filtering is carried out on one surface of the filter screen cup positioned on the upper part of the partition plate, the water entering the bubble generation area can not contain larger-particle impurities, then the bubble generation area I and the bubble generation area II can generate bubbles continuously, suspended matters or pollutants on the water surface can be adsorbed by the rising of the bubbles, oxygen supply can be carried out on the sewage in the oxygen increasing area I and the oxygen increasing area II, the bubbles are adsorbed by the adsorption device, the impurities are removed, the advanced filtering before the air floatation operation is carried out, the water outlet at the later stage is not blocked, and the smoothness of the air floatation operation.

Preferably, the lower outer wall of the uniform stirring area is provided with a water inlet, the outer wall at the water inlet is provided with a first motor, an output shaft of the first motor penetrates through the wall of the machine box to be rotatably connected with a first stirring shaft, the first stirring shaft is provided with a plurality of first stirring blades, and one ends, far away from the first stirring rod, of the first stirring blades are connected with first guide plates.

Adopt above-mentioned technical scheme, the rotation of motor one can drive first (mixing) shaft and rotate, and first (mixing) shaft rotates and to make first stirring leaf rotate, makes first guide plate also follow the rotation, and the sewage stirring of lower floor gets into from the water inlet always as sewage, and when constantly being full of the upper strata, impurity in the sewage of lower floor is blocked by the filter screen cup and is stayed the lower floor, and the water that breaks away from large granule impurity just can get into the upper strata, has played the effect of just filteration.

Preferably, the upper layer of the uniform stirring area is provided with a box cover, the box cover is rotatably connected to the top of the case, the upper end face of the box cover is fixedly connected with a second motor, the second motor penetrates through the box cover and is rotatably connected with a second stirring shaft, the second stirring shaft is arranged on the upper layer, the second stirring shaft is provided with a plurality of second stirring blades, and one ends, far away from the second stirring rods, of the second stirring blades are connected with second guide plates.

By adopting the technical scheme, the sewage on the upper layer is stirred, so that the sewage entering the bubble generation first area, the oxygenation first area, the bubble generation second area and the oxygenation second area can be uniformly stirred and has consistent concentration.

Preferably, the bubble generation area comprises a micro-nano bubble generator and a bubble pipeline, the micro-nano bubble generator is installed outside the case, the bubble pipeline is arranged inside the case and connected with the micro-nano bubble generator, and a plurality of bubble holes are formed in the bubble pipeline.

Adopt above-mentioned technical scheme, the micron bubble that micro-nano bubble generator produced is very slow at the ascending speed of aquatic, so can stay longer time in the aquatic, and electrified micron bubble surface is negatively charged, and for ordinary bubble, its negatively charged is than higher, can adsorb the material that is charged positively in the water, plays fine effect to the absorption and the separation of getting rid of aquatic suspended solid or pollutant, and the setting of a plurality of bleb holes can make the bubble production volume increase, improves the adsorptivity of impurity.

Preferably, the first oxygenation area comprises an oxygenation pump, a third motor and a plurality of U-shaped pipes, the third motor is fixedly mounted on the wall of the machine box, an output shaft of the third motor penetrates through the wall of the machine box and is rotatably connected with a hollow rotating shaft, two ends of each U-shaped pipe are communicated with the rotating shaft, the oxygenation pump is mounted on the wall of the machine box opposite to the third motor, an air outlet of the oxygenation pump is connected to one end, far away from the third motor, of the rotating shaft, and a plurality of oxygenation holes are formed in each of the U-shaped pipes and the rotating shaft.

By adopting the technical scheme, the first oxygen increasing area can play a role in increasing oxygen for sewage, and the rotation of the third motor can drive the rotation shaft and the U-shaped pipe to rotate, so that the stirring effect is achieved, the contact area of water and air is increased, and more oxygen is dissolved into the sewage.

Preferably, the adsorption device comprises a fixed plate and a slag scraping device, the slag scraping device is rotatably connected with two ends of the fixed plate, an inclined accommodating plate is abutted to the lower portion of one end of the slag scraping device, one end of the accommodating plate is connected with an accommodating groove, air cylinders are arranged on four sides of the bottom of the other two ends of the fixed plate, the air cylinders are arranged in the wall thickness of the top of the case, and telescopic rods of the air cylinders are fixedly connected to the fixed plate.

Adopt above-mentioned technical scheme, the cylinder advances to give vent to anger and makes the height of scraping the sediment device, can the butt at the sewage liquid level, scrape the sediment device and rotate can be more comprehensive the bubble that is attached to impurity on the liquid level adsorbs to get back to storage plate department and strike off the just absorbent impurity of scraping the sediment device, impurity falls along the inclination of storage plate and accomodates the inslot, and the sediment device of scraping after the storage plate is handled can get into the liquid level again with clean state and remove other impurity bubbles, reduce the secondary pollution of liquid level.

Preferably, the bottom of the case of the first bubble generation area, the first oxygen increasing area, the second bubble generation area and the second oxygen increasing area is an inclined plane, the lower part of the inclined plane and the uniform stirring area are communicated with a plurality of material receiving grooves, the material receiving grooves are provided with material receiving openings, and the material receiving openings are provided with valves.

Adopt above-mentioned technical scheme, the setting on inclined plane can make the sediment homeopathic landing, and the entering connects the silo, need not thrust device to promote, has saved the input of spare part, connects the material mouthful in addition and is equipped with the valve and can store a certain amount of waste residue, treats that the manual work can open the valve and take out the waste residue when full.

Preferably, two side walls of the case are provided with flushing devices, each flushing device comprises a water rack, a water tank and two water delivery hoses, the water rack is mounted on the wall of the case, the water tank is arranged on the water rack, the water tank is provided with two water discharge ports, the two water delivery hoses are respectively connected to the corresponding water discharge ports, the outer wall of the case is provided with two motors IV, output shafts of the motors IV penetrate through the wall of the case to be rotatably connected with a hollow pipe, the hollow pipe is provided with a plurality of water outlet nozzles, the water delivery hoses penetrate through the wall of the case to be communicated with the middle of the hollow pipe, and a pressure pump is arranged between the water discharge ports of the water tank and.

Adopt above-mentioned technical scheme, can press water input water hose through the force pump to can follow powerful blowout in a plurality of faucet under the effect of pressure, play the effect of washing quick-witted incasement wall, under the effect of motor four, can drive the hollow tube and rotate, can change the angle of washing, make washing of quick-witted incasement wall more comprehensive, improve the cleanliness.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a vertical sectional view of the embodiment;

fig. 3 is a cross-sectional view in the horizontal direction of the embodiment.

Reference numerals: 1. a chassis; 11. a water outlet; 12. a water inlet; 2. a support leg; 3. a uniform stirring zone; 31. an upper layer; 311. a second motor; 312. a second stirring shaft; 313. a second stirring blade; 32. a lower layer; 321. a first motor; 322. a first stirring shaft; 323. a first stirring blade; 324. a first baffle; 4. a bubble generation zone; 41. a micro-nano bubble generator; 42. a bubble tube; 43. a bubble standpipe; 431. bubble holes; 5. oxygenation of a first area; 51. an oxygenation pump; 52. a third motor; 53. a U-shaped tube; 531. an oxygen increasing hole; 54. a rotating shaft; 6. A bubble generation zone II; 7. an oxygenation second area; 8. a partition plate; 9. a filter screen cup; 13. a placing table; 14. an adsorption device; 141. a fixing plate; 142. a slag scraping device; 143. a storage plate; 144. a receiving groove; 145. a cylinder; 15. a box cover; 16. a material receiving groove; 161. a material receiving port; 162. a valve; 17. a flushing device; 171. a water rack; 172. a water tank; 1721. a water discharge outlet; 173. a water delivery hose; 174. a fourth motor; 175. a hollow tube; 1751. a water outlet nozzle; 176. a pressure pump.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.

As shown in fig. 1, an air flotation machine for sewage treatment comprises a case 1 with a water outlet 11, wherein a plurality of support legs 2 are arranged below the case 1, and the case 1 is sequentially divided into a uniform stirring area 3, a bubble generation first area 4, an oxygen increasing first area 5, a bubble generation second area 6 and an oxygen increasing second area 7 along the length direction of the case; a partition plate 8 is arranged between the uniform stirring area 3 and the first bubble generation area 4; the uniform stirring zone 3 comprises an upper layer 31 and a lower layer 32, and a filter screen cup 9 is arranged between the upper layer 31 and the lower layer 32; a placing table 13 is arranged on the wall of the case 1 positioned in the uniform stirring area 3, and the height of the placing table 13 is the same as that of the partition plate 8; the bottom of the filter screen cup 9 is respectively arranged on the placing table 13 and the top of the clapboard 8; the size of the filtering holes on one surface of the filtering mesh cup 9 above the clapboard 8 is smaller than the sizes of the filtering holes on the other three surfaces and the bottom.

As shown in fig. 1 and 2, the outer wall of the lower layer 32 of the uniform stirring area 3 is provided with a water inlet 12, the outer wall at the position of the water inlet 12 is provided with a first motor 321, the output shaft of the first motor 321 penetrates through the wall of the case 1 to be rotatably connected with a first stirring shaft 322, the first stirring shaft 322 is provided with a plurality of first stirring blades 323, and one end of the first stirring blade 323, which is far away from the first stirring rod, is connected with a first guide plate 324.

As shown in fig. 1 and 2, a box cover 15 is arranged on the upper layer 31 of the uniform stirring area 3, the box cover 15 is rotatably connected to the top of the case 1, a second motor 311 is fixedly connected to the upper end face of the box cover 15, the second motor 311 penetrates through the box cover 15 and is rotatably connected with a second stirring shaft 312, the second stirring shaft 312 is arranged on the upper layer 31, the second stirring shaft 312 is provided with a plurality of second stirring blades 313, and one ends of the second stirring blades 313, which are far away from the second stirring rod, are connected with second guide plates.

As shown in fig. 2, the case cover 15 can abut against the edge above the filter cup 9, so as to prevent the filter cup 9 from shaking insecurely under the action of water, thereby enhancing the stability of the filter cup, and moreover, when the filter cup 9 is taken out, the case cover 15 is opened, so that the filter cup 9 can be simply and quickly read out to dump impurities, which is very convenient.

As shown in fig. 3, the first bubble generation area 4 and the second bubble generation area 6 have the same structure, the first bubble generation area 4 comprises a micro-nano bubble generator 41 and a bubble pipeline 42, the micro-nano bubble generator 41 is installed outside the case 1, the bubble pipeline 42 is arranged inside the case 1 and connected with the micro-nano bubble generator 41, and the bubble pipeline 42 is provided with a plurality of bubble holes 431.

As shown in fig. 3, the first oxygen increasing area 5 and the second oxygen increasing area 7 have the same structure, the first oxygen increasing area 5 includes an oxygen increasing pump 51, a third motor 52 and a plurality of U-shaped tubes 53, the third motor 52 is fixedly mounted on the wall of the chassis 1, an output shaft of the third motor 52 penetrates through the wall of the chassis 1 and is rotatably connected with a hollow rotating shaft 54, two ends of each U-shaped tube 53 are communicated with the rotating shaft 54, the oxygen increasing pump 51 is mounted on the wall of the chassis 1 opposite to the third motor 52, an air outlet of the oxygen increasing pump 51 is connected to one end of the rotating shaft 54 far away from the third motor 52, and the U-shaped tubes 53 and the rotating shaft.

As shown in fig. 2, the bottom of the cabinet 1 with the first bubble generation area 4, the first oxygen increasing area 5, the second bubble generation area 6 and the second oxygen increasing area 7 is an inclined plane, the lower part of the inclined plane and the uniform stirring area 3 are both communicated with a plurality of material receiving grooves 16, the material receiving grooves 16 are provided with material receiving openings 161, and the material receiving openings 161 are provided with valves 162.

As shown in fig. 1, the top of the chassis 1 is provided with the adsorption device 14, the adsorption device 14 includes a fixing plate 141 and a slag scraping device 142, the slag scraping device 142 is rotatably connected to two ends of the fixing plate 141, an inclined receiving plate 143 is abutted to a lower portion of one end of the slag scraping device 142, one end of the receiving plate 143 is connected to a receiving groove 144, four sides of the bottom of the other two ends of the fixing plate 141 are provided with air cylinders 145, the air cylinders 145 are disposed in the wall thickness of the top of the chassis 1, and telescopic rods of the air cylinders 145 are fixedly connected to the fixing plate 141.

As shown in fig. 1 and 2, two side walls of the case 1 are provided with flushing devices 17, each flushing device 17 comprises a water rack 171, a water tank 172 and two water delivery hoses 173, the water rack 171 is mounted on a wall of the case 1, the water tank 172 is disposed on the water rack 171, the water tank 172 is provided with two water discharge ports 1721, the two water delivery hoses 173 are respectively connected to the corresponding water discharge ports 1721, the outer wall of the case 1 is provided with two motors 174, output shafts of the motors 174 penetrate through the wall of the case 1 to be rotatably connected with hollow pipes 175, the hollow pipes 175 are provided with a plurality of water outlet nozzles 1751, the water delivery hoses 173 penetrate through the wall of the case 1 to be communicated with the middle parts of the hollow pipes 175, and a pressure pump 176 is disposed between.

The specific working principle is as follows: sewage enters the lower layer 32 of the uniform stirring area 3 from the water inlet 12, a motor 321 is started, a first stirring shaft 322 drives a first stirring blade 323 thereon, a first guide plate 324 rotates, the uniform stirring effect of an air passage is achieved, when the sewage is added more and more, the sewage enters the upper layer 31 of the uniform stirring area 3 through the bottom of the filter screen cup 9, a filter screen at the bottom of the filter screen cup 9 blocks impurities with large particles in the sewage of the lower layer 32, the sewage of the upper layer 31 in the machine can be firstly subjected to primary coarse filtration, the upper layer 31 is filled with water, meanwhile, a motor two 311 of the upper layer 31 is also started, a second stirring shaft 312 is moved to rotate, the sewage drives a second stirring blade 313, and the second guide plate rotates to send the sewage into a bubble generation area 4 after being uniformly stirred.

Micro-nano bubble generator starts, gaseous bubble that escapes from the bleb hole 431 through the bubble tube 42, the bubble is constantly from quick-witted case 1 bottom up-floating, adsorb aquatic suspended solid and pollutant, and float in the liquid level, simultaneously, the oxygen pump in oxygenation district 5 is also starting, motor three 52 also starts simultaneously, make axis of rotation 54 rotate and drive U-shaped pipe 53 and also rotate, the oxygen pump spreads out the air from the oxygenation hole 531 of U-shaped pipe 53 simultaneously, not only increase oxygen in the sewage, the motor and U-shaped pipe 53 rotate and play the effect of stirring again, the area of contact of water and air has been increased, make more oxygen melt into in the sewage.

Originally, the cylinder 145 that is in the jacking state of admitting air gives vent to anger, make fixed plate 141 move down, make the lower bottom surface of scraping the sediment device 142 just in time can glue the bubble that has the suspended solid, start and scrape sediment device 142 and rotate, it can be more comprehensive to scrape sediment device 142 and adsorb the bubble that has impurity on the liquid level, and get back to storage plate 143 department and strike off the just adsorbed impurity of scraping sediment device 142, impurity falls to storage tank 144 along storage plate 143's inclination, and scrape sediment device 142 after storage plate 143 handles can get into the liquid level again with clean state and remove other impurity bubbles, reduce the secondary pollution of liquid level.

The sediment in the case 1 can slide into the receiving groove 16 under the inclination of the inclined plane, and the receiving opening 161 is provided with a valve 162 to store a certain amount of waste residue, so that after the sewage is discharged through the water outlet 11, the valve 162 can be opened manually to take out the waste residue.

After the air supporting operation, can press water from water tank 172 into water delivery hose 173 through force pump 176 to can follow powerful blowout in a plurality of faucet 1751 under the effect of pressure, play the effect of washing quick-witted case 1 inner wall, under the effect of motor four 174, can drive hollow tube 175 and rotate, can change the angle of washing, make washing of quick-witted case 1 inner wall more comprehensive, improve the cleanliness.

Claims

1. An air floatation machine for sewage treatment comprises a case (1) with a water outlet (11), wherein a plurality of support legs (2) are arranged below the case (1), and the air floatation machine is characterized in that the case (1) is sequentially divided into a uniform stirring area (3), a bubble generation first area (4), an oxygen increasing first area (5), a bubble generation second area (6) and an oxygen increasing second area (7) along the length direction of the case; a partition plate (8) is arranged between the uniform stirring area (3) and the first bubble generation area (4); the uniform stirring area (3) comprises an upper layer (31) and a lower layer (32), and a filter screen cup (9) is arranged between the upper layer (31) and the lower layer (32); a placing table (13) is arranged on the wall of the case (1) positioned in the uniform stirring area (3), and the height of the placing table (13) is the same as that of the partition board (8); the bottom of the filter screen cup (9) is respectively arranged on the top of the placing table (13) and the partition plate (8); the size of the filtering holes in one surface of the filtering mesh cup (9) above the partition plate (8) is smaller than the sizes of the filtering holes in the other three surfaces and the bottom; the bubble generation first area (4) and the bubble generation second area (6) have the same structure, and the oxygenation first area (5) and the oxygenation second area (7) have the same structure; and an adsorption device (14) is arranged at the top of the case (1).

2. The air flotation machine for sewage treatment as claimed in claim 1, wherein a water inlet (12) is formed in an outer wall of the lower layer (32) of the uniform stirring area (3), a first motor (321) is arranged on an outer wall at the water inlet (12), an output shaft of the first motor (321) penetrates through a wall of the cabinet (1) to be rotatably connected with a first stirring shaft (322), the first stirring shaft (322) is provided with a plurality of first stirring blades (323), and one end, away from the first stirring rod, of each first stirring blade (323) is connected with a first guide plate (324).

3. The air flotation machine for sewage treatment as claimed in claim 2, wherein a tank cover (15) is arranged on an upper layer (31) of the uniform stirring area (3), the tank cover (15) is rotatably connected to the top of the cabinet (1), a second motor (311) is fixedly connected to an upper end face of the tank cover (15), the second motor (311) penetrates through the tank cover (15) and is rotatably connected with a second stirring shaft (312), the second stirring shaft (312) is arranged on the upper layer (31), the second stirring shaft (312) is provided with a plurality of second stirring blades (313), and one ends, far away from the second stirring rods, of the second stirring blades (313) are connected with second guide plates.

4. The air flotation machine for sewage treatment according to claim 3, wherein the bubble generation area (4) comprises a micro-nano bubble generator (41) and a bubble pipeline (42), the micro-nano bubble generator (41) is installed outside the machine case (1), the bubble pipeline (42) is arranged inside the machine case (1) and connected with the micro-nano bubble generator (41), and a plurality of bubble holes (431) are formed in the bubble pipeline (42).

5. The air flotation machine for sewage treatment as claimed in claim 4, wherein the first oxygenation area (5) comprises an oxygenation pump (51), a motor three (52) and a plurality of U-shaped pipes (53), the motor three (52) is fixedly mounted on the wall of the case (1), output shafts of the motor three (52) penetrate through the wall of the case (1) to be connected with a hollow rotating shaft (54) in a rotating manner, two ends of the U-shaped pipes (53) are communicated with the rotating shaft (54), the oxygenation pump (51) is mounted on the wall of the case (1) opposite to the motor three (52), an air outlet of the oxygenation pump (51) is connected to one end, far away from the motor three (52), of the rotating shaft (54), and the U-shaped pipes (53) and the rotating shaft (54) are both provided with a plurality of oxygenation holes (531).

6. The air flotation machine for sewage treatment according to claim 5, wherein the adsorption device (14) comprises a fixing plate (141) and a slag scraping device (142), the slag scraping device (142) is rotatably connected with two ends of the fixing plate (141), an inclined receiving plate (143) abuts against a lower portion of one end of the slag scraping device (142), one end of the receiving plate (143) is connected with a receiving groove (144), air cylinders (145) are arranged on four sides of the bottom of the other two ends of the fixing plate (141), the air cylinders (145) are arranged in the wall thickness of the top of the case (1), and telescopic rods of the air cylinders (145) are fixedly connected to the fixing plate (141).

7. The air flotation machine for sewage treatment according to claim 6, wherein the bottom of the machine box (1) of the bubble generation first area (4), the oxygenation first area (5), the bubble generation second area (6) and the oxygenation second area (7) is an inclined plane, a plurality of material receiving grooves (16) are communicated with the uniform stirring area (3) below the inclined plane, the material receiving grooves (16) are provided with material receiving openings (161), and the material receiving openings (161) are provided with valves (162).

8. The air flotation machine for sewage treatment as claimed in claim 7, wherein two side walls of the machine case (1) are provided with flushing devices (17), each flushing device (17) comprises a water rack (171), a water tank (172) and two water delivery hoses (173), the water racks (171) are mounted on the wall of the machine case (1), the water tanks (172) are arranged on the water racks (171), the water tanks (172) are provided with two water discharge ports (1721), the two water delivery hoses (173) are respectively connected to the corresponding water discharge ports (1721), the outer wall of the machine case (1) is provided with two motor generators (174), output shafts of the motor generators (174) penetrate through the wall of the machine case (1) to be rotatably connected with hollow pipes (175), the hollow pipes (175) are provided with a plurality of water outlets (1751), the water delivery hoses (173) penetrate through the wall of the machine case (1) to be communicated with the middle parts of the hollow pipes (175), a pressure pump (176) is arranged between the water outlet (1721) of the water tank (172) and the water delivery hose (173).