PDS / PMS Advanced Oxidation Sewage Treatment Device

Abstract

The present invention relates to the technical field of sewage treatment, and particularly to a PDS / PMS advanced oxidation sewage treatment device. The device includes a box body, in which a partition is fixed. The partition divides the box body into an upper cavity and a lower cavity. A drain port and a water inlet, which are respectively communicated with the upper cavity and the lower cavity, are fixed on the box body. A plurality of ultraviolet lamps are fixed in the upper end of the upper cavity and the upper end of the lower cavity. A baffle is fixed in the upper cavity, and the baffle divides the upper cavity into a secondary treatment cavity and an installation cavity. The drain port is communicated with the secondary treatment cavity. A honeycomb catalyst layer is fixed in the secondary treatment cavity above the drain port. A spraying assembly is slidably arranged in the secondary treatment cavity above the honeycomb catalyst layer. A driving unit is arranged on the box body, and the driving unit is connected with the spraying assembly. After the spray holes of the device are blocked, the inner core, the outer sleeve and the atomizing cover can move downward. After the inner core, the outer sleeve and the atomizing cover move downward, a plurality of atomizing caps can be dispersed, so that the impurities blocked in the spray holes can be discharged.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a PDS / PMS advanced oxidation sewage treatment device. Background Art

[0002] With the acceleration of industrialization and urbanization, the problem of water pollution has become increasingly serious, especially the treatment of refractory organic pollutants has become a major challenge in the environmental protection field. In the prior art, photocatalytic technology has received extensive attention due to its green and efficient characteristics, but there are problems of low treatment efficiency when used alone. As strong oxidants, peroxymonosulfate (PMS) and persulfate (PDS) can generate a variety of reactive free radicals under photocatalytic conditions, significantly enhancing the oxidative degradation ability. However, how to effectively integrate the PMS and PDS photocatalytic processes and optimize the treatment efficiency remains a technical problem to be solved urgently.

[0003] By atomizing and spraying the sewage containing persulfate onto a honeycomb catalyst with a large specific surface area, a thin water film is formed on the honeycomb catalyst. Under the continuous irradiation of the upper chamber ultraviolet lamp, oxygen-containing species such as sulfate radicals, hydroxyl radicals, superoxide radicals and singlet oxygen further react with the organic matter molecules in the sewage on the surface of the honeycomb catalyst, thereby deeply degrading the organic matter in the sewage. In this process, the large specific surface area of the honeycomb catalyst improves the contact efficiency between oxygen-containing species such as sulfate radicals, hydroxyl radicals, superoxide radicals and singlet oxygen and organic matter molecules, accelerating the degradation reaction. However, due to the presence of more impurities in the sewage, the nozzles are prone to frequent blockage during the process of atomizing and spraying the sewage with conventional nozzles, thereby reducing the sewage treatment efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is a PDS / PMS advanced oxidation sewage treatment device capable of automatically dredging after the spray holes of the spray unit are blocked by impurities in the sewage.

[0005] In order to achieve the above object, the technical solution provided by the present invention is:

[0006] PDS / PMS advanced oxidation sewage treatment device, comprising a box body, a partition is fixed inside the box body, the partition divides the box body into an upper cavity and a lower cavity, a drain port and a water inlet which are respectively communicated with the upper cavity and the lower cavity are fixed on the box body, a plurality of ultraviolet lamps are fixed inside the upper end of the upper cavity and the upper end of the lower cavity, a baffle is fixed inside the upper cavity, the baffle divides the upper cavity into a secondary treatment cavity and an installation cavity, the drain port is communicated with the secondary treatment cavity, a honeycomb catalyst layer is fixed inside the secondary treatment cavity above the drain port, a spraying assembly is slidably arranged inside the secondary treatment cavity above the honeycomb catalyst layer, a driving unit is arranged on the box body, the driving unit is connected with the spraying assembly, a water pump is fixed inside the lower cavity, the inlet end of the water pump is communicated with the lower cavity, and the outlet end of the water pump is communicated with the spraying assembly through a corrugated water pipe; the spraying assembly comprises a connecting plate, the connecting plate is slidably connected with the box body, a first slider is fixed at the upper end of the connecting plate, the first slider is connected with the driving unit, fixing blocks are fixed at both ends of the connecting plate, the fixing blocks are fixedly connected with an upper water pipe, the corrugated water pipe is communicated with the upper water pipe, a plurality of spraying units are fixed at the lower end of the connecting plate, and the spraying units are communicated with the upper water pipe through a communicating pipe.

[0007] Specifically, the spraying unit comprises a shell, the upper end of the shell is fixedly connected with the connecting plate, an inner core is slidably and sealingly inserted into the lower part of the shell, the lower end of the inner core extends below the shell, and the lower end of the inner core is open;

[0008] A piston is slidably and sealingly connected inside the shell above the inner core, the upper end of the piston is connected with the upper end of the shell through a first spring, and the upper end of the inner core is connected with the piston through a pull rope; an upper ring cavity is formed between the inner core and the shell, a slot hole is formed in the inner core inside the shell, the slot hole communicates the upper ring cavity and the inside of the inner core, a one-way valve is installed in the slot hole, and the one-way valve only allows the liquid in the upper ring cavity to enter the inside of the inner core through the slot hole and the one-way valve;

[0009] A vertical hole is opened at the upper end of the inner core. The vertical hole is communicated with the inside of the inner core. A vertical shaft is slidably and sealingly connected in the vertical hole. The upper end of the vertical shaft is located above the inner core and fixedly connected to a fixing plate. The fixing plate is fixed in the housing. An inlet hole is opened on the side wall of one side of the housing. The inlet hole is communicated with a communicating pipe. A rotating and sealing connection is made on the inner core with an inlet pipe concentric with the inlet hole. The inlet pipe is located above the slot hole. The end of the inlet pipe away from the inner core is fixedly communicated with the lower end of a strip-shaped communicating disc. The communicating disc is in sliding and sealing contact with the inner wall of the housing on one side thereof. The inlet hole is communicated with the inlet pipe through the communicating disc. A first gear and a second gear are concentrically sleeved on the part of the inlet pipe on the outer side of the inner core. Both the first gear and the second gear are connected to the inlet pipe through one-way bearings. The idle rotation directions of the first gear and the second gear are opposite. A vertical first rack is fixed in the housing on one side of the first gear. The first rack meshes with the first gear. When the inner core moves downward, the first rack can drive the first gear to rotate idly. A vertical second rack is fixed in the housing below the second gear. After the inner core moves downward for a certain distance, the second gear can mesh with the second rack. After the second gear meshes with the second rack, the second rack can make the communicating disc and the inlet pipe rotate through the second gear and the one-way bearing therein. After the inner core moves to the lower dead point, the second rack can make the communicating disc and the inlet pipe rotate 180 degrees through the second gear and the one-way bearing therein. A combined nozzle is sleeved and installed on the outer side of the inner core below the housing. After the inner core moves outward from the housing, the side of the combined nozzle away from the housing can be dispersed to discharge the impurities blocked in the combined nozzle.

[0010] Specifically, the combined nozzle includes an outer sleeve, which is fixedly sleeved outside the inner core. The inner core penetrates through the outer sleeve. A plurality of sliding sleeves are fixedly arranged on the outer side of the outer sleeve. A sliding rod corresponding to the sliding sleeve is fixedly arranged at the lower end of the housing. The sliding rod penetrates through the sliding sleeve, and the sliding rod is slidably connected with the sliding sleeve. The length direction of the sliding rod is parallel to the axial direction of the inner core. Spring rods are fixedly arranged at the lower ends of the sliding rods. The telescopic direction of the spring rod is perpendicular to the movement direction of the inner core. A connecting block is fixedly arranged at the free end of the spring rod. A roller is rotatably connected to the connecting block. A chute corresponding to the roller is formed in the outer sleeve. The chute is in an inverted V shape. The chute is close to the sliding rod on one side of its middle part. The roller is arranged to roll in the lower part of the chute on one side of it. During the process that the inner core drives the outer sleeve to move downward, under the guiding action of the chute on the roller, the connecting block can move, the length of the spring rod changes, and the movement direction of the connecting block is perpendicular to the movement direction of the inner core. Under the elastic force of the spring rod and the guiding action of the chute on the roller, the outer sleeve and the inner core have a tendency to move upward; a plurality of atomizing caps are slidably connected to the lower end of the outer sleeve. The number of atomizing caps is the same as that of the sliding rods and they correspond to each other one by one. The sliding direction of the atomizing cap is perpendicular to the movement direction of the inner core. Adjacent two atomizing caps are in sealed contact. The plurality of atomizing caps enclose to form an atomizing cover. The lower end of the inner core is inserted into the atomizing cover. The upper end of the atomizing cover is in sealed contact with the lower end of the outer sleeve. A spray hole is formed between the lower ends of the plurality of atomizing caps. The liquid discharged from the lower end of the inner core can be atomized and sprayed out through the spray hole. A top rod is fixedly arranged at the upper end of each atomizing cap. The chute is located between the top rod and the sliding rod on one side of it. An upper guiding surface is processed on the upper end of the top rod. A lower guiding surface is processed on the top rod below the upper guiding surface. The lower ends of both the upper guiding surface and the lower guiding surface are inclined towards the outer side of the outer sleeve. A wedge block corresponding to the top rod is fixedly arranged at the lower end of the outer sleeve. The inclined surface of the wedge block is in contact with the upper guiding surface. Under the guiding and matching action of the inclined surface of the wedge block and the upper guiding surface, the atomizing cap has a tendency to move towards the center of the inner core. During the process that the outer sleeve drives the atomizing cover to move downward, after the connecting block contacts the lower guiding surface, under the guiding action of the lower guiding surface, the atomizing cap can move towards the outer side of the inner core; a first sliding shaft is elastically and slidably connected inside the lower end of the sliding rod. The first sliding shaft is parallel to the sliding rod. The sliding direction of the first sliding shaft is parallel to the movement direction of the inner core. The first sliding shaft slidably penetrates through a through hole at the upper end of the atomizing cap on one side of it.

[0011] Specifically, the driving unit includes a motor fixed on the box body. A screw rod is concentrically and fixedly connected to the output shaft of the motor. The screw rod is located inside the box body. The screw rod is rotatably connected to the box body. The screw rod penetrates through the first slider, and the screw rod is in threaded connection with the first slider.

[0012] Specifically, a guiding rod is fixed inside the box body. The guiding rod is parallel to the screw rod. The guiding rod is slidably connected with the first slider.

[0013] Specifically, both the first rack and the second rack are fixed inside the housing through support plates.

[0014] Specifically, a second slider is fixed to the upper end of the atomizing cap, a guide groove corresponding to the second slider is opened at the lower end of the outer sleeve, the second slider is slidably arranged in the corresponding guide groove, and the sliding direction of the second slider is perpendicular to the movement direction of the inner core.

[0015] Specifically, the spring rod includes a sleeve fixedly connected to the sliding rod, the second sliding shaft is slidably arranged in the sleeve, one end of the second sliding shaft is located outside the sleeve, the connecting block is fixedly connected to one end of the second sliding shaft outside the sleeve, a third spring is arranged in the sleeve, one end of the third spring is fixedly connected to the sleeve, and the other end of the third spring is fixedly connected to the second sliding shaft.

[0016] Specifically, a blind hole is opened at the lower part of the slide rod, the upper part of the first slide shaft is slidably arranged in the blind hole, a second spring is arranged in the blind hole, the upper end of the second spring is fixedly connected to the slide rod, and the lower end of the second spring is fixedly connected to the upper end of the first slide shaft.

[0017] Specifically, a lower annular cavity is formed between the inner core and the outer sleeve, and a spiral blade is arranged in the lower annular cavity, and the spiral blade is fixed on the outer side of the inner core. The spiral blade forms a spiral channel in the lower annular cavity, and an air pipe is arranged on one side of the connecting plate, and the air pipe is fixedly connected to the fixed block, and the air pipe is connected to the upper end of the spiral channel through a soft branch pipe. An air pump is installed in the installation cavity, and the inlet end of the air pump is connected to the outside of the box, and the outlet end of the air pump is connected to the air pipe through a soft connecting pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. After the spray hole of the device is blocked, the inner core, the outer jacket and the atomizing cover can move downward. After the inner core, the outer jacket and the atomizing cover can move downward, the multiple atomizing caps can be dispersed, thereby enabling the impurities blocked in the spray hole to be discharged.

[0020] 2. By setting up an air pump, the air pump can make compressed air flow through the spiral channel, which can increase the water outlet pressure of the spray hole and improve the atomization effect of the sewage. When removing impurities in the spray hole, the compressed air in the spiral motion can easily blow off the impurities attached to the lower end of the atomizing cap.

[0021] 3. After the impurities at the lower end of the atomizing cap are blown off, under the action of the sewage pressure in the piston and the lower shell, the elastic force of the third spring in the spring rod, and the guiding action of the roller and the lower part of the slide groove on the outer sleeve, the inner core, the outer sleeve and multiple atomizing caps can move upward. During the upward movement of the atomizing cap, it can be folded and formed into an atomizing cover, thereby continuing to atomize the sewage discharged from the lower end of the inner core.

[0022] 4. By atomizing and spraying the wastewater containing persulfate onto the honeycomb catalyst layer with a large specific surface area, a thin water film is formed on the honeycomb catalyst layer. Under the continuous irradiation of the ultraviolet lamp in the upper cavity, oxygen-containing species such as sulfate radicals, hydroxyl radicals, superoxide radicals, and singlet oxygen further react with the organic molecule in the wastewater on the surface of the honeycomb catalyst layer, thereby deeply degrading the organic matter in the wastewater. During this process, the large specific surface area of the honeycomb catalyst layer improves the contact efficiency between oxygen-containing species such as sulfate radicals, hydroxyl radicals, superoxide radicals, and singlet oxygen and organic molecules, accelerating the degradation reaction.

[0023] 5. After the wastewater mixed with persulfate enters the lower cavity, under the irradiation of the ultraviolet lamp in the lower cavity, the wastewater can be degraded for the first time. The wastewater is treated in both the secondary treatment cavity and the lower cavity, realizing double treatment of the wastewater, and the treatment effect of the wastewater is good. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of this device.

[0025] Figure 2 It is a schematic diagram inside the box.

[0026] Figure 3 It is a front view of the internal structure of the box.

[0027] Figure 4 It is a schematic diagram of the spraying assembly.

[0028] Figure 5 It is a schematic diagram of the spraying unit.

[0029] Figure 6 It is a schematic diagram after the inner core, outer sleeve, and multiple atomizing caps move downward.

[0030] Figure 7 It is a schematic diagram of the cooperation between the inner core of the spraying unit and the vertical shaft.

[0031] Figure 8 It is a position relationship diagram of the first rack, second rack, first gear, and second gear.

[0032] Figure 9 It is a state diagram before the inner core moves downward.

[0033] Figure 10 It is a schematic diagram of the split structure of the outer sleeve and the atomizing cover.

[0034] Figure 11 It is a cross-sectional view of the sliding rod and the spring rod.

[0035] The names of the components in the attached drawings are as follows: 1. box body; 2. water inlet; 3. drain outlet; 4. partition board; 5. ultraviolet lamp; 6. baffle; 7. honeycomb catalyst layer; 8. air pump; 9. water pump; 10. corrugated water pipe; 11. motor; 12. screw rod; 13. guide rod; 14. first slider; 15. connecting plate; 16. fixing block; 17. water supply pipe; 18. air pipe; 19. flexible branch pipe; 20. connecting pipe; 21. housing; 211. inlet hole; 22. first spring; 23. piston; 24. pull rope; 25. inner core; 26. inlet pipe; 261. connecting disk; 27. slot hole; 28. one-way valve; 29. spiral blade; 30. outer sleeve; 31. sliding sleeve; 32. sliding groove; 33. atomizing cap; 34. second slider; 35. ejector rod; 351. upper guiding surface; 352. lower guiding surface; 36. wedge block; 37. sliding rod; 38. second spring; 39. first sliding shaft; 40. sleeve; 41. third spring; 42. second sliding shaft; 43. connecting block; 44. roller; 45. spray hole; 46. vertical hole; 47. vertical shaft; 48. fixing plate; 49. support plate; 50. second rack; 51. first gear; 52. second gear; 53. first rack; 54. upper annular cavity; 55. lower annular cavity. Detailed implementation mode

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] Embodiment 1: As Figures 1 - 11 shown, the PDS / PMS advanced oxidation sewage treatment device includes a box body 1. A partition board 4 is fixed inside the box body 1. The partition board 4 divides the box body 1 into an upper cavity and a lower cavity. A drain outlet 3 and a water inlet 2 that are respectively communicated with the upper cavity and the lower cavity are fixed on the box body 1. A plurality of ultraviolet lamps 5 are fixed inside the upper end of the upper cavity and the upper end of the lower cavity.

[0038] A baffle 6 is fixed in the upper cavity. The baffle 6 divides the upper cavity into a secondary treatment cavity and an installation cavity. The drain outlet 3 is communicated with the secondary treatment cavity. A honeycomb catalyst layer 7 is fixed in the secondary treatment cavity above the drain outlet 3. A spraying assembly is slidably arranged in the secondary treatment cavity above the honeycomb catalyst layer 7.

[0039] A driving unit is arranged on the box body 1. The driving unit is connected to the spraying assembly. A water pump 9 is fixed in the lower cavity. The inlet end of the water pump 9 is communicated with the lower cavity. The outlet end of the water pump 9 is communicated with the spraying assembly through a corrugated water pipe 10.

[0040] After the sewage mixed with persulfate enters the lower cavity through the water inlet 2, under the irradiation of the ultraviolet lamp 5 in the lower cavity, the sewage can be degraded for the first time. The water pump 9 and the driving unit are started, and the driving unit makes the spraying assembly reciprocate in the secondary treatment cavity.

[0041] The water pump 9 pumps the water in the lower cavity to the spraying assembly, and the spraying assembly sprays the sewage onto the honeycomb catalyst layer 7. By atomizing and spraying the sewage containing persulfate onto the honeycomb catalyst layer 7 with a large specific surface area, a thin water film is formed on the honeycomb catalyst layer 7 by the sewage. Under the continuous irradiation of the ultraviolet lamp 5 in the upper cavity, oxygen-containing species such as sulfate radicals, hydroxyl radicals, superoxide radicals, and singlet oxygen further react with the organic molecule in the sewage on the surface of the honeycomb catalyst layer 7, thereby deeply degrading the organic matter in the sewage. During this process, the large specific surface area of the honeycomb catalyst layer 7 improves the contact efficiency between oxygen-containing species such as sulfate radicals, hydroxyl radicals, superoxide radicals, and singlet oxygen and organic molecules, accelerating the degradation reaction. The sewage secondary-treated in the secondary treatment cavity passes through the honeycomb catalyst layer 7 and is discharged to the outside of the box body 1 through the drain port 3.

[0042] The spraying assembly includes a connecting plate 15, which is slidably connected to the box body 1. A first slider 14 is fixed to the upper end of the connecting plate 15, and the first slider 14 is connected to the driving unit.

[0043] Fixed blocks 16 are fixed to both ends of the connecting plate 15, and the fixed blocks 16 are fixedly connected to the water supply pipe 17. The corrugated water pipe 10 is communicated with the water supply pipe 17. A plurality of spraying units are fixed to the lower end of the connecting plate 15, and the spraying units are communicated with the water supply pipe 17 through the connecting pipe 20.

[0044] The driving unit includes a motor 11 fixed to the box body 1. A screw rod 12 is concentrically and fixedly connected to the output shaft of the motor 11. The screw rod 12 is located inside the box body 1 and is rotatably connected to the box body 1. The screw rod 12 penetrates through the first slider 14, and the screw rod 12 is threadedly connected to the first slider 14. Specifically, a guide rod 13 is fixed inside the box body 1. The guide rod 13 is parallel to the screw rod 12, and the guide rod 13 is slidably connected to the first slider 14.

[0045] The motor 11 drives the screw rod 12 to rotate reciprocally, and the connecting plate 15 can drive the spraying assembly to reciprocate in the secondary treatment cavity.

[0046] As Figure 4 and Figure 7 shown, the spraying unit includes a housing 21. The upper end of the housing 21 is fixedly connected to the connecting plate 15. An inner core 25 is slidably and sealingly inserted into the lower part of the housing 21. The lower end of the inner core 25 extends below the housing 21, and the lower end of the inner core 25 is open.

[0047] AsFigure 6 , Figure 7 and Figure 8 As shown in Figure 6 , Figure 7 and Figure 8 , a piston 23 is slidably and sealingly connected in a housing 21 above an inner core 25. The upper end of the piston 23 is connected to the upper end of the housing 21 by a first spring 22, and the upper end of the inner core 25 is connected to the piston 23 by a pull rope 24.

[0048] As Figure 7 and Figure 9 shown, an upper ring cavity 54 is formed between the inner core 25 and the housing 21. A slot hole 27 is formed in the inner core 25 in the housing 21. The slot hole 27 communicates the upper ring cavity 54 and the inside of the inner core 25. A one-way valve 28 is installed in the slot hole 27. The one-way valve 28 only allows the liquid in the upper ring cavity 54 to enter the inside of the inner core 25 through the slot hole 27 and the one-way valve 28.

[0049] As Figure 7 shown, a vertical hole 46 is formed at the upper end of the inner core 25. The vertical hole 46 communicates with the inside of the inner core 25. A vertical shaft 47 is slidably and sealingly connected in the vertical hole 46. The upper end of the vertical shaft 47 is located above the inner core 25 and is fixedly connected to a fixing plate 48. The fixing plate 48 is fixed in the housing 21.

[0050] As Figure 9 shown, an inlet hole 211 is formed in a side wall of the housing 21. The inlet hole 211 communicates with a communicating pipe 20. An inlet pipe 26 concentric with the inlet hole 211 is rotatably and sealingly connected to the inner core 25. The inlet pipe 26 is located above the slot hole 27. One end of the inlet pipe 26 away from the inner core 25 is fixedly communicated with the lower end of a strip-shaped communicating disk 261. The communicating disk 261 is in sliding and sealing contact with the inner wall of the housing 21 on one side thereof. The inlet hole 211 communicates with the inlet pipe 26 through the communicating disk 261.

[0051] As Figure 8 , Figure 9 and Figure 10 shown, a first gear 51 and a second gear 52 are concentrically sleeved on a part of the inlet pipe 26 outside the inner core 25. Both the first gear 51 and the second gear 52 are connected to the inlet pipe 26 through one-way bearings. The idle rotation directions of the first gear 51 and the second gear 52 are opposite. A vertical first rack 53 is fixed in the housing 21 on one side of the first gear 51. The first rack 53 meshes with the first gear 51. When the inner core 25 moves downward, the first rack 53 can drive the first gear 51 to idle rotate. A vertical second rack 50 is fixed in the housing 21 below the second gear 52. Both the first rack 53 and the second rack 50 are fixed in the housing 21 through a support plate 49.

[0052] After the inner core 25 moves downward for a certain distance, the second gear 52 can engage with the second rack 50. After the second gear 52 engages with the second rack 50, the second rack 50 can cause the communication disk 261 and the inlet pipe 26 to rotate through the second gear 52 and the one-way bearing inside it. After the inner core 25 moves to the bottom dead center, the second rack 50 can cause the communication disk 261 and the inlet pipe 26 to rotate 180 degrees through the second gear 52 and the one-way bearing inside it.

[0053] A combined nozzle is sleeved and installed on the outer side of the inner core 25 below the housing 21. After the inner core 25 moves outward from the housing 21, the side of the combined nozzle away from the housing 21 can disperse and discharge the impurities blocked in the combined nozzle.

[0054] As Figures 5 - 11 shown, the combined nozzle includes an outer sleeve 30. The outer sleeve 30 is fixedly sleeved on the outer side of the inner core 25. The inner core 25 penetrates through the outer sleeve 30. A plurality of sliding sleeves 31 are fixedly arranged on the outer side of the outer sleeve 30. A sliding rod 37 corresponding to the sliding sleeve 31 is fixedly arranged at the lower end of the housing 21. The sliding rod 37 penetrates through the sliding sleeve 31, and the sliding rod 37 is slidably connected with the sliding sleeve 31. The length direction of the sliding rod 37 is parallel to the axial direction of the inner core 25.

[0055] Spring rods are fixedly arranged at the lower ends of the sliding rods 37. The telescopic direction of the spring rods is perpendicular to the movement direction of the inner core 25. A connecting block 43 is fixedly arranged at the free end of the spring rod. A roller 44 is rotatably connected to the connecting block 43. A chute 32 corresponding to the roller 44 is formed in the outer sleeve 30. The chute 32 is in an inverted V shape. The chute 32 is close to one side of the sliding rod 37 in the middle. The roller 44 is rotatably arranged in the lower part of one side of the chute 32. Specifically, the spring rod includes a sleeve 40 fixedly connected with the sliding rod 37. A second sliding shaft 42 is slidably arranged in the sleeve 40. One end of the second sliding shaft 42 is located outside the sleeve 40. The connecting block 43 is fixedly connected with one end of the second sliding shaft 42 outside the sleeve 40. A third spring 41 is arranged in the sleeve 40. One end of the third spring 41 is fixedly connected with the sleeve 40, and the other end of the third spring 41 is fixedly connected with the second sliding shaft 42.

[0056] During the process of the inner core 25 driving the outer sleeve 30 to move downward, under the guiding action of the chute 32 on the roller 44, the connecting block 43 can move, the length of the spring rod changes, and the movement direction of the connecting block 43 is perpendicular to the movement direction of the inner core 25. As Figure 8 shown in the state, under the elastic force of the spring rod and the guiding action of the chute 32 on the roller 44, the outer sleeve 30 and the inner core 25 have a tendency to move upward.

[0057] A plurality of atomizing caps 33 are slidably connected to the lower end of the outer sleeve 30. The number of atomizing caps 33 is the same as and corresponds one by one to the number of sliding rods 37. The sliding direction of the atomizing caps 33 is perpendicular to the moving direction of the inner core 25, and adjacent atomizing caps 33 are in sealed contact. Specifically, second sliders 34 are fixedly provided at the upper ends of the atomizing caps 33, and guide grooves corresponding to the second sliders 34 are formed at the lower end of the outer sleeve 30. The second sliders 34 are slidably disposed in the corresponding guide grooves, and the sliding direction of the second sliders 34 is perpendicular to the moving direction of the inner core 25.

[0058] The plurality of atomizing caps 33 surround to form an atomizing cover. The lower end of the inner core 25 is inserted into the atomizing cover. The upper end of the atomizing cover is in sealed contact with the lower end of the outer sleeve 30. Spray holes 45 are formed between the lower ends of the plurality of atomizing caps 33, and the liquid discharged from the lower end of the inner core 25 can be atomized and ejected through the spray holes 45.

[0059] Top rods 35 are fixedly provided at the upper ends of the atomizing caps 33. The sliding groove 32 is located between the top rod 35 and the sliding rod 37 on one side thereof. An upper guiding surface 351 is machined at the upper end of the top rod 35, and a lower guiding surface 352 is machined on the top rod 35 below the upper guiding surface 351. The lower ends of the upper guiding surface 351 and the lower guiding surface 352 are both inclined towards the outside of the outer sleeve 30. A wedge block 36 corresponding to the top rod 35 is fixedly provided at the lower end of the outer sleeve 30. The inclined surface of the wedge block 36 is in contact with the upper guiding surface 351. Under the guiding and cooperating action of the inclined surface of the wedge block 36 and the upper guiding surface 351, the atomizing cap 33 has a tendency to move towards the center of the inner core 25.

[0060] During the process of the outer sleeve 30 driving the atomizing cover to move downward, after the connecting block 43 comes into contact with the lower guiding surface 352, under the guiding action of the lower guiding surface 352, the atomizing cap 33 can move towards the outside of the inner core 25.

[0061] A first sliding shaft 39 is elastically and slidably connected to the lower end inside the sliding rod 37. The first sliding shaft 39 is parallel to the sliding rod 37. The sliding direction of the first sliding shaft 39 is parallel to the moving direction of the inner core 25. The first sliding shaft 39 slidably penetrates through a through hole at the upper end of the atomizing cap 33 on one side thereof. Specifically, a blind hole is formed in the lower part of the sliding rod 37. The upper part of the first sliding shaft 39 is slidably disposed in the blind hole. A second spring 38 is disposed in the blind hole. The upper end of the second spring 38 is fixedly connected to the sliding rod 37, and the lower end of the second spring 38 is fixedly connected to the upper end of the first sliding shaft 39.

[0062] After the water pump 9 is started, the sewage in the lower cavity flows through the corrugated water pipe 10, the upper water pipe 17 and the communicating pipe 20, passes through the inlet hole 211, the communicating disc 261 and the inlet pipe 26, and then enters the inner core 25. Since a one-way valve 28 is provided in the slot hole 27, the sewage entering the inner core 25 will not be discharged into the housing 21 through the slot hole 27. After the sewage is discharged from the lower end of the inner core 25, it is atomized when flowing through the spray holes 45.

[0063] When impurities in the sewage cause the spray holes 45 to be blocked, the sewage pressure inside the inner core 25 increases. After the sewage inside the inner core 25 acts on the vertical shaft 47 inside the vertical hole 46, the inner core 25, the outer sleeve 30, and the atomization cover move downward. In the initial stage of the downward movement of the inner core 25, the outer sleeve 30, and the atomization cover, since the atomization caps 33 are slidably connected to the first sliding shaft 39, the multiple atomization caps 33 will not disperse.

[0064] When the outer sleeve 30 moves downward, the sliding groove 32 on the outer sleeve 30 moves downward with the outer sleeve 30, and the roller 44 moves inside the lower inclined portion of the sliding groove 32 and gradually approaches the middle position of the sliding groove 32. When the roller 44 gradually approaches the middle position of the sliding groove 32, the roller 44, the connecting block 43, and the second sliding shaft 42 approach the sliding rod 37 on one side thereof, and the third spring 41 is compressed.

[0065] During the downward movement of the inner core 25, the first rack 53 causes the first gear 51 to rotate idly, thereby maintaining the connection between the communication disk 261 and the inlet hole 211 in the initial stage of the downward movement of the inner core 25, preventing sewage from entering the housing 21 through the inlet hole 211 before the roller 44 crosses the middle position of the sliding groove 32 during the downward movement of the inner core 25.

[0066] Before the roller 44 crosses the middle position of the sliding groove 32, the communication disk 261 remains connected to the inlet hole 211, and sewage will not enter the housing 21. Thereby, the pressure of the sewage inside the inner core 25 can be ensured, ensuring that the inner core 25 can continue to move downward and enabling the roller 44 to cross the middle position of the sliding groove 32.

[0067] When the roller 44 crosses the middle position of the sliding groove 32, the atomization cap 33 is separated from the first sliding shaft 39. After that, under the elastic force of the third spring 41, the second sliding shaft 42 drives the connecting block 43 and the roller 44 to quickly move away from the sliding rod 37 on one side thereof.

[0068] During the process that the second sliding shaft 42 drives the connecting block 43 and the roller 44 to quickly move away from the sliding rod 37 on one side thereof, under the elastic force of the third spring 41 and the guiding action of the upper inclined portion of the sliding groove 32 on the roller 44, the inner core 25, the outer sleeve 30, and the atomization cover move downward quickly. During the process that the inner core 25, the outer sleeve 30, and the atomization cover move downward quickly, when the lower guiding surface 352 on the ejector rod 35 contacts the connecting block 43, under the guiding action of the lower guiding surface 352, the atomization cap 33 moves towards the outside of the inner core 25, and the multiple atomization caps 33 disperse. After the multiple atomization caps 33 disperse, the impurities blocking the spray holes 45 fall out. After the multiple atomization caps 33 disperse, a part of the sewage discharged from the lower end of the inner core 25 can further impact the impurities blocking the spray holes 45.

[0069] When the roller 44 passes over the middle position of the chute 32 and the inner core 25 moves downward, after the second gear 52 meshes with the second rack 50, the second rack 50 causes the communication disk 261 and the inlet pipe 26 to rotate through the second gear 52 and the one-way bearing therein. During the rotation of the communication disk 261 and the inlet pipe 26, after the communication disk 261 is misaligned with the inlet hole 211, part of the sewage begins to enter the housing 21 through the inlet hole 211. At this time, the slot hole 27 moves to the lower part of the housing 21.

[0070] Under the elastic force of the third spring 41 and the guiding action of the inclined part on the chute 32 on the roller 44, after the inner core 25 moves to the lower dead point, the pull rope 24 is tightened, and the second rack 50 causes the communication disk 261 and the inlet pipe 26 to rotate 180 degrees through the second gear 52 and the one-way bearing therein. When the communication disk 261 is completely misaligned with the inlet hole 211, only sewage will enter the housing 21.

[0071] As the sewage in the housing 21 continuously increases, under the pressure of the sewage in the housing 21, the sewage in the housing 21 squeezes the piston 23 to move upward, the first spring 22 is compressed, and during the upward movement of the piston 23, the inner core 25, the outer sleeve 30 and multiple atomizing caps 33 are pulled upward through the pull rope 24. During the upward movement of the inner core 25, the second rack 50 drives the second gear 52 to rotate idly, thereby maintaining the distance between the communication disk 261 and the inlet hole 211 and preventing the roller 44 from passing over the middle position of the chute 32 and the inlet hole 211 from communicating with the communication disk 261 during the upward movement of the inner core 25.

[0072] Before the roller 44 passes over the middle position of the chute 32 during the upward movement of the inner core 25, the communication disk 261 is not communicated with the inlet hole 211, which can ensure the pressure of the sewage in the housing 21, and further ensure that the inner core 25 can continue to move upward and cause the roller 44 to move upward and pass over the middle position of the chute 32.

[0073] During the upward movement of the inner core 25, when the roller 44 passes over the middle position of the chute 32, under the elastic force of the third spring 41, the second sliding shaft 42 drives the connecting block 43 and the roller 44 to quickly move away from the sliding rod 37 on one side thereof. During the process of the second sliding shaft 42 driving the connecting block 43 and the roller 44 to quickly move away from the sliding rod 37 on one side thereof, under the elastic force of the third spring 41 and the guiding action of the lower inclined part of the chute 32 on the roller 44, the inner core 25, the outer sleeve 30 and multiple atomizing caps 33 quickly move upward. During the process of the inner core 25, the outer sleeve 30 and multiple atomizing caps 33 quickly moving upward, after the upper end of the atomizing cap 33 contacts the lower end of the first sliding shaft 39, the atomizing cap 33 can cause the first sliding shaft 39 to move upward and compress the second spring 38.

[0074] After the upper guide surface 351 comes into contact with the inclined surface of the wedge block 36, as the inner core 25, the outer sleeve 30, and the plurality of atomization caps 33 continuously move upward, under the guiding action of the upper guide surface 351 and the inclined surface of the wedge block 36, the plurality of atomization caps 33 move towards the inner core 25. When the plurality of atomization caps 33 enclose to form an atomization cover, the first sliding shaft 39 penetrates through the perforation at the upper end of one side of the atomization cap 33. At this time, the atomization cap 33 returns to its original state, and the plurality of atomization caps 33 enclose again to form an atomization cover.

[0075] When the roller 44 passes over the middle position of the chute 32 and the inner core 25 moves upward, the first gear 51 meshes with the first rack 53. The first rack 53 causes the communication disk 261 and the inlet pipe 26 to rotate through the first gear 51 and the one-way bearing inside it. During the rotation of the communication disk 261 and the inlet pipe 26, after the communication disk 261 is connected to the inlet hole 211, the sewage begins to enter the inner core 25 through the communication disk 261. When the inner core 25 reaches the upper dead center of its movement, the first rack 53 causes the communication disk 261 and the inlet pipe 26 to rotate back to their original positions through the first gear 51 and the one-way bearing inside it. At this time, the slot hole 27 is located inside the housing 21, and the sewage flowing through the inlet hole 211 only enters the inner core 25. The sewage is discharged from the lower end of the inner core 25 and atomized and sprayed out through the spray holes 45.

[0076] After the slot hole 27 is located inside the housing 21, under the elastic force of the first spring 22, the piston 23 moves downward and returns to its original position. During the process of the piston 23 moving downward and returning to its original position, the sewage inside the housing 21 enters the inner core 25 through the slot hole 27 and the one-way valve 28 inside it.

[0077] Embodiment 2: On the basis of Embodiment 1, as Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 and Figure 9 shown, a lower annular cavity 55 is formed between the inner core 25 and the outer sleeve 30. A spiral blade 29 is arranged inside the lower annular cavity 55. The spiral blade 29 is fixed to the outside of the inner core 25. The spiral blade 29 causes the lower annular cavity 55 to form a spiral channel. One side of the connecting plate 15 is provided with an air pipe 18. The air pipe 18 is fixedly connected to the fixing block 16. The air pipe 18 is communicated with the upper end of the spiral channel through a flexible branch pipe 19. An air pump 8 is installed inside the installation cavity. The inlet end of the air pump 8 is communicated with the outside of the box body 1, and the outlet end of the air pump 8 is communicated with the air pipe 18 through a flexible connecting pipe.

[0078] When the sewage is atomized and sprayed out from the spray holes 45, the air pump 8 is started. The air pump 8 causes the compressed air to enter the spiral channel through the flexible connecting pipe, the air pipe 18, and the flexible branch pipe 19. The compressed air spirally descends in the spiral channel. The compressed air acting on the sewage inside the spray holes 45 can increase the pressure of the sewage discharged from the spray holes 45 and improve the atomization effect of the sewage.

[0079] After multiple atomizing caps 33 are dispersed, the compressed air flowing spirally downward can blow off the impurities at the lower end of the atomizing cap 33, which can improve the effect of removing impurities.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A PDS / PMS advanced oxidation sewage treatment device, comprising a housing (1), a partition (4) fixed inside the housing (1), the partition (4) dividing the housing (1) into an upper chamber and a lower chamber, a drain port (3) and a water inlet (2) respectively connected to the upper chamber and the lower chamber are fixed on the housing (1), a plurality of ultraviolet lamps (5) are fixed in the upper end of the upper chamber and the upper end of the lower chamber, characterized in that: A baffle (6) is fixed in the upper chamber, the baffle (6) divides the upper chamber into a secondary treatment chamber and an installation chamber, the drain port (3) is connected to the secondary treatment chamber, a honeycomb catalyst layer (7) is fixed in the secondary treatment chamber above the drain port (3), a spray assembly is slidably arranged in the secondary treatment chamber above the honeycomb catalyst layer (7), a driving unit is arranged on the box body (1), the driving unit is connected to the spray assembly, a water pump (9) is fixed in the lower chamber, the inlet end of the water pump (9) is connected to the lower chamber, and the outlet end of the water pump (9) is connected to the spray assembly through a corrugated water pipe (10); the spray assembly comprises a connecting plate (15), the connecting plate (15) is slidably connected to the box body (1), a first slider (14) is fixed on the upper end of the connecting plate (15), and the first The slider (14) is connected to the driving unit, and fixed blocks (16) are fixed at both ends of the connecting plate (15), the fixed blocks (16) are fixedly connected to the upper water pipe (17), the corrugated water pipe (10) is connected to the upper water pipe (17), and a plurality of spray units are fixed at the lower end of the connecting plate (15), and the spray units are connected to the upper water pipe (17) through a connecting pipe (20); the spray unit comprises a shell (21), the upper end of the shell (21) is fixedly connected to the connecting plate (15), an inner core (25) is inserted in a sliding seal in the lower part of the shell (21), the lower end of the inner core (25) extends to the lower part of the shell (21), and the lower end of the inner core (25) is open; a piston (23) is connected in a sliding seal in the shell (21) above the inner core (25), and the piston (23) ) is connected to the upper end of the housing (21) through a first spring (22), and the upper end of the inner core (25) is connected to the piston (23) through a pull rope (24); an upper annular cavity (54) is formed between the inner core (25) and the housing (21), a slot hole (27) is provided on the inner core (25) in the housing (21), the slot hole (27) communicates with the upper annular cavity (54) and the interior of the inner core (25), a one-way valve (28) is installed in the slot hole (27), and the one-way valve (28) only allows liquid in the upper annular cavity (54) to enter the interior of the inner core (25) through the slot hole (27) and the one-way valve (28); a vertical hole (46) is provided on the upper end of the inner core (25), the vertical hole (46) communicates with the interior of the inner core (25), and a sliding seal is provided in the vertical hole (46) A vertical shaft (47) is connected, the upper end of the vertical shaft (47) is located above the inner core (25) and is fixedly connected to a fixing plate (48), and the fixing plate (48) is fixed in the shell (21); an inlet hole (211) is opened on the side wall of one side of the shell (21), and the inlet hole (211) is connected to the connecting pipe (20); an inlet pipe (26) concentric with the inlet hole (211) is rotatably sealed and connected to the inner core (25); the inlet pipe (26) is located above the slot hole (27); one end of the inlet pipe (26) away from the inner core (25) is fixedly connected to the lower end of a long strip-shaped connecting disk (261); the connecting disk (261) is in sliding sealing contact with the inner wall of the shell (21) on one side thereof; the inlet hole (211) is connected to the inlet pipe (26) through the connecting disk (261);A first gear (51) and a second gear (52) are coaxially sleeved on the inlet tube (26) outside the inner core (25). The first gear (51) and the second gear (52) are connected to the inlet tube (26) via a one-way bearing. The first gear (51) and the second gear (52) rotate in opposite directions. A vertical first rack (53) is fixed in the housing (21) on one side of the first gear (51). The first rack (53) meshes with the first gear (51). When the inner core (25) moves downward, the first rack (53) can drive the first gear (51) to rotate in an idle manner. A vertical second rack (50) is fixed in the housing (21) below the second gear (52). After the inner core (25) moves downward for a certain distance, the second rack (50) is engaged with the first gear (51). The gear (52) can mesh with the second rack (50). After the second gear (52) meshes with the second rack (50), the second rack (50) can rotate the connecting plate (261) and the inlet pipe (26) through the second gear (52) and the one-way bearing therein. After the inner core (25) moves to the lower dead point, the second rack (50) can rotate the connecting plate (261) and the inlet pipe (26) 180 degrees through the second gear (52) and the one-way bearing therein. A combined nozzle is sleeved and installed on the outer side of the inner core (25) below the shell (21). After the inner core (25) moves toward the outer side of the shell (21), the side of the combined nozzle away from the shell (21) can disperse and discharge the impurities blocked in the combined nozzle.

2. The PDS / PMS advanced oxidation wastewater treatment device according to claim 1, characterized in that: The combined nozzle comprises an outer sleeve (30), the outer sleeve (30) is fixedly sleeved on the outer side of the inner core (25), the inner core (25) passes through the outer sleeve (30), a plurality of sliding sleeves (31) are fixed on the outer side of the outer sleeve (30), a sliding rod (37) corresponding to the sliding sleeve (31) is fixed on the lower end of the shell (21), the sliding rod (37) passes through the sliding sleeve (31), the sliding rod (37) is slidably connected to the sliding sleeve (31), the length direction of the sliding rod (37) is parallel to the axial direction of the inner core (25), a spring rod is fixed at the lower end of each sliding rod (37), the telescopic direction of the spring rod is perpendicular to the movement direction of the inner core (25), a connecting block (43) is fixed on the free end of the spring rod, a roller (44) is rotatably connected to the connecting block (43), and a roller (44) is provided on the outer sleeve (30) to be connected to the inner core (25). The roller (44) corresponds to the slide groove (32), the slide groove (32) is in an inverted V shape, the middle of the slide groove (32) is close to the slide rod (37) on one side, and the roller (44) is rotatably arranged in the lower part of the slide groove (32) on one side. In the process of the inner core (25) driving the outer sleeve (30) to move downward, under the guiding effect of the slide groove (32) on the roller (44), the connecting block (43) can move, the length of the spring rod changes, and the movement direction of the connecting block (43) is perpendicular to the movement direction of the inner core (25). Under the elastic force of the spring rod and the guiding effect of the slide groove (32) on the roller (44), the outer sleeve (30) and the inner core (25) have a tendency to move upward; a plurality of atomizing caps (33) are slidably connected to the lower end of the outer sleeve (30), and the atomizing caps The number of (33) is the same as the number of the slide bars (37) and corresponds one to one. The sliding direction of the atomizing cap (33) is perpendicular to the moving direction of the inner core (25). Two adjacent atomizing caps (33) are in sealed contact. A plurality of atomizing caps (33) are combined to form an atomizing hood. The lower end of the inner core (25) is inserted into the atomizing hood. The upper end of the atomizing hood is in sealed contact with the lower end of the outer sleeve (30). A spray hole (45) is formed between the lower ends of the plurality of atomizing caps (33). The liquid discharged from the lower end of the inner core (25) can be sprayed out through the spray hole (45). A push rod (35) is fixed to the upper end of the atomizing cap (33). The slide groove (32) is located between the push rod (35) and the slide bar (37) on one side thereof. The upper end of the push rod (35) is processed with an upper guide surface (351). The upper guide surface (35 1) A lower guide surface (352) is machined on the lower push rod (35), the lower ends of the upper guide surface (351) and the lower ends of the lower guide surface (352) are both inclined toward the outer side of the outer sleeve (30), a wedge block (36) corresponding to the push rod (35) is fixed to the lower end of the outer sleeve (30), the inclined surface of the wedge block (36) is in contact with the upper guide surface (351), and under the guiding cooperation of the inclined surface of the wedge block (36) and the upper guide surface (351), the atomizing cap (33) has a tendency to move toward the center direction of the inner core (25), and when the outer sleeve (30) drives the atomizing cover downward, after the connecting block (43) contacts the lower guide surface (352), the atomizing cap (33) can move toward the outer side of the inner core (25) under the guiding action of the lower guide surface (352);A first sliding shaft (39) is elastically slidably connected to the lower end of the sliding rod (37), the first sliding shaft (39) is parallel to the sliding rod (37), the sliding direction of the first sliding shaft (39) is parallel to the movement direction of the inner core (25), and the first sliding shaft (39) slides through a through hole at the upper end of the atomizing cap (33) on one side thereof. ; 3. The PDS / PMS advanced oxidation wastewater treatment device according to claim 1, characterized in that: The drive unit comprises a motor (11) fixed on a housing (1); a screw rod (12) is coaxially fixedly connected to an output shaft of the motor (11); the screw rod (12) is located inside the housing (1); the screw rod (12) is rotationally connected to the housing (1); the screw rod (12) passes through a first slider (14); and the screw rod (12) is threadedly connected to the first slider (14).

4. The PDS / PMS advanced oxidation wastewater treatment device according to claim 3, characterized in that: A guide rod (13) is fixed inside the box body (1), the guide rod (13) is parallel to the screw rod (12), and the guide rod (13) is slidably connected to the first sliding block (14).

5. The PDS / PMS advanced oxidation wastewater treatment device according to claim 1, characterized in that: The first rack (53) and the second rack (50) are both fixed in the housing (21) via a support plate (49).

6. The PDS / PMS advanced oxidation wastewater treatment device according to claim 2, characterized in that: A second slider (34) is fixed to the upper end of the atomizing cap (33), a guide groove corresponding to the second slider (34) is opened at the lower end of the outer sleeve (30), and the second slider (34) is slidably arranged in the corresponding guide groove, and the sliding direction of the second slider (34) is perpendicular to the movement direction of the inner core (25).

7. The PDS / PMS advanced oxidation wastewater treatment device according to claim 2, characterized in that: The spring rod comprises a sleeve (40) fixedly connected to the slide rod (37); a second slide shaft (42) is slidably arranged in the sleeve (40); one end of the second slide shaft (42) is located outside the sleeve (40); a connecting block (43) is fixedly connected to one end of the second slide shaft (42) outside the sleeve (40); a third spring (41) is arranged in the sleeve (40); one end of the third spring (41) is fixedly connected to the sleeve (40); and the other end of the third spring (41) is fixedly connected to the second slide shaft (42).

8. The PDS / PMS advanced oxidation wastewater treatment device according to claim 2, characterized in that: A blind hole is provided at the lower portion of the slide bar (37), and the upper portion of the first slide shaft (39) is slidably arranged in the blind hole. A second spring (38) is arranged in the blind hole, and the upper end of the second spring (38) is fixedly connected to the slide bar (37), and the lower end of the second spring (38) is fixedly connected to the upper end of the first slide shaft (39).

9. The PDS / PMS advanced oxidation wastewater treatment device according to claim 2, characterized in that: A lower annular cavity (55) is formed between the inner core (25) and the outer sleeve (30). A spiral blade (29) is arranged in the lower annular cavity (55). The spiral blade (29) is fixed to the outer side of the inner core (25). The spiral blade (29) forms a spiral channel in the lower annular cavity (55). An air pipe (18) is arranged on one side of the connecting plate (15). The air pipe (18) is fixedly connected to the fixing block (16). The air pipe (18) is connected to the upper end of the spiral channel through a soft branch pipe (19). An air pump (8) is installed in the installation cavity. The inlet end of the air pump (8) is connected to the outside of the box body (1), and the outlet end of the air pump (8) is connected to the air pipe (18) through a soft connecting pipe.

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