Wet garbage compression mechanism for compression garbage truck

Abstract

The invention relates to the technical field of garbage treatment equipment, and discloses a wet garbage compression mechanism for a compression garbage truck, which comprises a carriage, and the carriage is provided with a pushing mechanism, a sewage hole, a collecting mechanism and an anti-blocking mechanism; the sewage hole is formed in the bottom of the carriage; the pushing mechanism comprises a shell, an oil cylinder, a cover plate, a pushing plate and a sliding strip, the pushing plate is slidably connected to the interior of the carriage, the shell is fixedly installed on the right side of the inner wall of the carriage, and the oil cylinder is fixedly installed in the shell; the carriage is installed on the garbage truck, the oil cylinder is started to drive the push plate to move so that collected wet garbage can be compressed and discharged, the oil cylinder is arranged in the shell and located in the right side area of the push plate, the oil cylinder can get rid of the acid environment and is prevented from being corroded, and the push plate making contact with the wet garbage is made of stainless steel and other anti-corrosion materials. Therefore, the reliability of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to waste disposal equipment technical field, specifically to a kind of wet garbage compression mechanism for compression garbage truck. BACKGROUND

[0002] Compression garbage truck is composed of sealed garbage compartment, hydraulic system, operating system.The whole vehicle is fully sealed, self-compression, self-dumping, sewage in compression process all enters sewage compartment, more thoroughly solve the problem of secondary pollution in garbage transportation process, avoid inconvenience to people.The garbage handled by compression garbage truck includes wet garbage.

[0003] Wet garbage is mainly composed of kitchen waste, food residue, swill, etc., and its characteristics are high water content, semi-liquid property and easy fermentation to produce biological acid with strong corrosivity, which makes the internal moving mechanism of compression garbage truck easily corroded and damaged in acidic environment for a long time, and the reliability is poor, so frequent maintenance is required. SUMMARY

[0004] (I) Technical problem solved In view of the shortcomings of the prior art, the present application provides a wet garbage compression mechanism for compression garbage truck.

[0005] (II) Technical scheme To achieve the above object, the present application provides the following technical scheme: a wet garbage compression mechanism for compression garbage truck, comprising a vehicle box, a pushing mechanism, a sewage hole, a collecting mechanism and an anti-blocking mechanism are arranged on the vehicle box; the sewage hole is opened at the bottom of the vehicle box; the pushing mechanism comprises a housing, an oil cylinder, a cover plate, a push plate and a sliding bar, the push plate is slidingly connected inside the vehicle box, the housing is fixedly installed on the inner wall right side of the vehicle box, and the oil cylinder is fixedly installed inside the housing, the output end of the oil cylinder extends to the outside of the housing through the inner wall left side of the housing, and is fixedly connected with the right side outer wall of the push plate.

[0006] Preferably, the output end of the oil cylinder is movably connected with the housing, the cover plate is fixedly installed on the top of the housing by bolts, the sliding bar is fixedly installed on the inner wall front and back side of the vehicle box, sliding openings are formed on the front and back side of the push plate, the sliding bar is slidingly connected with the sliding openings by penetrating the sliding openings, the sliding bar and the sliding openings are arranged to make the push plate stably slide, the cover plate is arranged to facilitate the maintenance of the oil cylinder, and the oil cylinder, the high-pressure oil pipe, the sensor and other parts are all arranged on the right side of the push plate, which is separated from the garbage, and a filler cabin is installed on the left side of the vehicle box, the scraper mechanism inside the filler cabin is driven to rotate repeatedly by another oil cylinder, and the garbage is pushed into the vehicle box, which is the prior art.

[0007] Preferably, the collecting mechanism comprises a sewage tank, a frame, a box, a fixed plate, a handle, a sewage pipe, the sewage tank is fixedly installed at the bottom of the vehicle box and has an upward opening, the sewage hole is located directly above the sewage tank, and the sewage pipe is communicatively arranged on the front of the sewage tank and is provided with a control valve, so that the opening and closing of the sewage pipe can be controlled, and the handle facilitates the extraction of the box.

[0008] Preferably, the frame is fixedly installed inside the sewage tank, and the box is arranged at the top of the frame, a rectangular groove is formed in the right side of the sewage tank, a through hole is formed in the left side of the inner wall of the rectangular groove, the box extends into the inside of the sewage tank through the through hole, and the box is in sliding connection with the through hole and the sewage tank, the fixed plate is fixedly installed on the right side of the box and is inserted into the inside of the rectangular groove, and the bottom of the box is provided with a sieve hole, the handle is fixedly installed on the right side of the fixed plate, and the fixed plate can be matched with the rectangular groove to achieve a sealing effect.

[0009] Preferably, the right side of the sewage tank is provided with a limiting mechanism, the limiting mechanism comprises a fixed hole, a fixed rod, a rack, a connecting plate, a limiting rod, a gear, a connecting shaft, a motor and a mounting plate, the fixed hole is formed in the handle, the fixed rod is inserted into the inside of the fixed hole and is fixedly connected with the top of the rack at the bottom, the rack is in meshing connection with the gear, and the fixed rod and the fixed hole can stably install the box in the sewage tank.

[0010] Preferably, the connecting plate is fixedly installed on the left side of the rack, and the limiting rod is fixedly installed on the right side of the sewage tank and is in sliding connection with the connecting plate by penetrating the connecting plate, so that the connecting plate and the limiting rod can stably move the rack up and down.

[0011] Preferably, the mounting plate is fixedly installed on the right side of the sewage tank, the motor is fixedly installed on the front of the mounting plate, the connecting shaft is fixedly installed at the output end of the motor, and the gear is fixedly installed at the front end of the connecting shaft, so that the motor can drive the gear to rotate.

[0012] Preferably, the anti-blocking mechanism comprises a horizontal plate, an electric push rod, an L-shaped plate, a square plate, a plug rod and a vertical rod, the horizontal plate is fixedly installed on the right side of the push plate and the electric push rod is fixedly installed at the bottom of the horizontal plate, the L-shaped plate is fixedly installed at the top of the square plate and is fixedly connected with the output end of the electric push rod at the top, the plug rod is fixedly installed at the bottom of the square plate, the vertical rod is fixedly installed at the bottom of the horizontal plate and is in sliding connection with the L-shaped plate by penetrating the L-shaped plate, the number of the plug rod corresponds to that of the sewage hole, and the vertical rod improves the stability of the up-and-down movement of the square plate.

[0013] Preferably, the right side of the car box is provided with a door plate, and the bottom is provided with a water collecting box in communication, a connecting pipe is arranged in communication between the water collecting box and the sewage tank, and the inner wall bottom of the car box is provided with an inclined surface to achieve the purpose of drainage.

[0014] (Three) beneficial effects Compared with the prior art, the present application provides a wet garbage compression mechanism for a compression type garbage truck, which has the following beneficial effects: 1. The wet garbage compression mechanism for the compression type garbage truck, by installing the car box on the garbage truck, starting the oil cylinder to drive the push plate to move can compress and discharge the collected wet garbage, the oil cylinder is arranged in the inside of the shell and located in the right side area of the push plate, which can avoid corrosion in the acidic environment, and the push plate in contact with the wet garbage is made of stainless steel or other corrosion-resistant materials, which has strong corrosion resistance and improves the reliability of the device.

[0015] 2. The wet garbage compression mechanism for the compression type garbage truck, by setting the sewage hole, the compressed sewage flows into the sewage tank, and the box body separates the impurities in the sewage, and the sewage can be discharged and treated by opening the control valve.

[0016] 3. The wet garbage compression mechanism for the compression type garbage truck, by starting the motor to drive the connecting shaft rod to rotate, the connecting shaft rod drives the gear to rotate, the gear drives the fixed rod to separate from the fixed hole through the rack, so that the handle is released from the restriction, and the box body can be pulled out for cleaning the impurities inside, which is convenient and firm.

[0017] 4. The wet garbage compression mechanism for the compression type garbage truck, by starting the oil cylinder to drive the square plate to move to the appropriate position, the insertion rod corresponds to the sewage hole, the electric push rod is started to drive the L-shaped plate to move down, the L-shaped plate drives the square plate to move down, and the insertion rod is inserted into the sewage hole to avoid blockage of the sewage hole.

[0018] 5. The wet garbage compression mechanism for the compression type garbage truck, by setting the water collecting box, the sewage leaked from the right side of the push plate can be collected, and then discharged into the sewage tank through the connecting pipe to avoid pollution of the right side area of the push plate. DETAILED DESCRIPTION

[0019] The accompanying drawings provide further understanding of the present application and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figure 1 It is a structural schematic diagram of the present application; Figure 2 It is a sectional view of the present application; Figure 3 Structure diagram of sewage tank and fixing plate of the application; Figure 4 Structure diagram of box body of the application; Figure 5 Enlarged view of B of the application; Figure 6 Enlarged view of A of the application.

[0020] In the figure: 1, car box; 2, pushing mechanism; 201, shell; 202, oil cylinder; 203, cover plate; 204, push plate; 205, slide bar; 3, door plate; 4, sewage hole; 5, collecting mechanism; 501, sewage tank; 502, frame; 503, box body; 504, fixing plate; 505, handle; 506, sewage pipe; 6, limiting mechanism; 601, fixing hole; 602, fixing rod; 603, rack; 604, connecting plate; 605, limiting rod; 606, gear; 607, connecting shaft; 608, motor; 609, mounting plate; 7, anti-blocking mechanism; 701, horizontal plate; 702, electric push rod; 703, L-shaped plate; 704, square plate; 705, plug rod; 706, vertical rod; 8, water collecting box; 9, connecting pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments of the application.

[0022] Examples of the described embodiments are shown in the drawings, in which the same or similar notations are used to represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the application, but cannot be understood as a limitation of the application.

[0023] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment 1 As Figures 1-2 shown, the present application provides a kind of wet garbage compression mechanism for compression garbage truck, including car 1, push mechanism 2 is provided on car 1, sewage hole 4, collection mechanism 5 and anti-blocking mechanism 7;Sewage hole 4 is opened in the bottom of car 1;Push mechanism 2 includes shell 201, oil cylinder 202, cover plate 203, push plate 204, slide bar 205, push plate 204 is slidably connected in the inside of car 1, shell 201 is fixedly installed in the right side of the inner wall of car 1, and oil cylinder 202 is fixedly installed in the inside of shell 201, the output end of oil cylinder 202 extends to the outside of shell 201 through the left side of the inner wall of shell 201, and is fixedly connected with the right side outer wall of push plate 204, the output end of oil cylinder 202 is movably connected with shell 201, cover plate 203 is fixedly installed on the top of shell 201 by bolt, slide bar 205 is fixedly installed on the front and rear sides of the inner wall of car 1, and the front and rear sides of push plate 204 are provided with sliding port, and slide bar 205 is slidably connected with sliding port by passing through sliding port, push plate 204 is stably slid by being provided with slide bar 205 and sliding port, oil cylinder 202 is attached to high-pressure oil pipe, sensor and other parts are all arranged on the right side of push plate 204, which is separated from garbage, and the left side of car 1 is provided with filler cabin, and the internal scraper mechanism is driven by another oil cylinder to rotate repeatedly, which pushes garbage into the inside of car 1, which is prior art.

[0026] In the present embodiment, by installing car 1 on the garbage truck, starting oil cylinder 202 drives push plate 204 to move to compress and discharge the collected wet garbage, oil cylinder 202 is arranged in the inside of shell 201 and located in the right side area of push plate 204, which can get rid of acidic environment and avoid corrosion, and push plate 204 in contact with wet garbage is made of stainless steel or other corrosion-resistant materials, with strong corrosion resistance, thereby improving the reliability of the device.

[0027] Embodiment 2 As Figures 2-4As shown, on the basis of embodiment 1, the application provides a technical scheme: preferably, the collecting mechanism 5 comprises a sewage tank 501, a frame 502, a box 503, a fixed plate 504, a handle 505 and a sewage pipe 506, the sewage tank 501 is fixedly installed at the bottom of the vehicle compartment 1 and has an upward opening, the sewage hole 4 is located directly above the sewage tank 501, the sewage pipe 506 is communicatively arranged on the front side of the sewage tank 501, and a control valve is arranged on the sewage pipe 506, so that the opening and closing of the sewage pipe 506 can be controlled, the handle 505 is arranged to facilitate the pulling of the box 503, the frame 502 is fixedly installed inside the sewage tank 501, and the box 503 is arranged at the top of the frame 502, a rectangular groove is formed in the right side of the sewage tank 501, a through hole is formed in the left side of the inner wall of the rectangular groove, the box 503 extends to the inside of the sewage tank 501 through the through hole, and the box 503 is in sliding connection with the through hole and the sewage tank 501, the fixed plate 504 is fixedly installed on the right side of the box 503 and is inserted into the rectangular groove, a sieve hole is formed in the bottom of the box 503, the handle 505 is fixedly installed on the right side of the fixed plate 504, the fixed plate 504 is arranged to achieve a sealing effect in cooperation with the rectangular groove, the right side of the vehicle compartment 1 is provided with the door plate 3, and the bottom is communicatively provided with the water collecting box 8, the water collecting box 8 and the sewage tank 501 are communicatively connected through the connecting pipe 9, and the inner wall of the vehicle compartment 1 is provided with a slope at the bottom to achieve the purpose of drainage, the water collecting box 8 is arranged to collect a small amount of sewage leaked from the right side of the push plate 204, which is then discharged into the sewage tank 501 through the connecting pipe 9, so as to avoid pollution of the area on the right side of the push plate 204.

[0028] In this embodiment, the sewage hole 4 is arranged to allow the compressed sewage to flow into the sewage tank 501, the box 503 separates impurities in the sewage, and the sewage can be discharged for treatment by opening the control valve.

[0029] Embodiment 3 As Figures 3-5As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a limiting mechanism 6 is provided on the right side of the sewage tank 501. The limiting mechanism 6 includes a fixing hole 601, a fixing rod 602, a rack 603, a connecting plate 604, a limiting rod 605, a gear 606, a connecting rod 607, a motor 608, and a mounting plate 609. The fixing hole 601 is opened on the handle 505. The fixing rod 602 is inserted into the inside of the fixing hole 601, and its bottom is fixedly connected to the top of the rack 603. The rack 603 is meshed with the gear 606. By setting the fixing rod 602 and the fixing hole 601, the box body 503 can be stabilized. A mounting plate 609 is fixedly installed inside the sewage tank 501. A connecting plate 604 is fixedly installed on the left side of the rack 603, and a limiting rod 605 is fixedly installed on the right side of the sewage tank 501, and slides through the connecting plate 604. By setting the connecting plate 604 and the limiting rod 605, the rack 603 can move up and down stably. A mounting plate 609 is fixedly installed on the right side of the sewage tank 501. A motor 608 is fixedly installed on the front side of the mounting plate 609, and a connecting rod 607 is fixedly installed on the output end of the motor 608. A gear 606 is fixedly installed on the front end of the connecting rod 607. By setting the motor 608, the gear 606 can be driven to rotate.

[0030] In this embodiment, the starting motor 608 drives the connecting rod 607 to rotate, the connecting rod 607 drives the gear 606 to rotate, and the gear 606 drives the fixing rod 602 to disengage from the fixing hole 601 through the rack 603, so that the handle 505 is released from restriction, and the box 503 can be pulled out to clean the impurities inside. The cleaning is convenient, and the box 503 is firmly installed.

[0031] Example 4 like Figure 2 , 6 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, the anti-blocking mechanism 7 includes a horizontal plate 701, an electric push rod 702, an L-shaped plate 703, a square plate 704, an insert rod 705, and a vertical rod 706. The horizontal plate 701 is fixedly installed on the right side of the push plate 204, and the electric push rod 702 is fixedly installed at the bottom of the horizontal plate 701. The L-shaped plate 703 is fixedly installed at the top of the square plate 704, and its top is fixedly connected to the output end of the electric push rod 702. The insert rod 705 is fixedly installed at the bottom of the square plate 704, and the vertical rod 706 is fixedly installed at the bottom of the horizontal plate 701, and slides through the L-shaped plate 703 and is connected to the L-shaped plate 703. The number of insert rods 705 corresponds to the number of sewage holes 4. The vertical rod 706 improves the stability of the square plate 704 moving up and down.

[0032] In this embodiment, the cylinder 202 is activated to move the square plate 704 to a suitable position so that the insertion rod 705 corresponds to the sewage hole 4. The electric push rod 702 is activated to move the L-shaped plate 703 down, and the L-shaped plate 703 moves the square plate 704 down. The insertion rod 705 is inserted into the sewage hole 4 to prevent the sewage hole 4 from being blocked.

[0033] The working principle of this type of wet waste compression mechanism for compressed garbage trucks will be explained in detail below.

[0034] like Figures 1-6 As shown, in use, by installing the container 1 on a garbage truck, starting the hydraulic cylinder 202 drives the push plate 204 to move, which can compress and discharge the collected wet waste. The hydraulic cylinder 202 is located inside the outer casing 201, on the right side of the push plate 204, thus avoiding an acidic environment and corrosion. The push plate 204, which comes into contact with the wet waste, is made of corrosion-resistant materials such as stainless steel, providing strong corrosion resistance and improving the reliability of the device. By providing a sewage hole 4, the compressed sewage flows into the sewage tank 501, where the box 503 separates impurities. Opening the control valve allows the sewage to be discharged. Starting the motor 608 drives the connecting rod 607 to rotate, which in turn drives the gear 606 to rotate. The gear 606 drives the fixing rod 602 to disengage from the fixing hole 601 via the rack 603, thereby releasing the handle 505 and allowing the box 503 to be pulled out for cleaning of internal impurities. This makes cleaning convenient and ensures that the box 503 is securely installed. The starting cylinder 202 moves the square plate 704 to a suitable position, aligning the insertion rod 705 with the sewage hole 4. The starting electric push rod 702 moves the L-shaped plate 703 downward, which in turn moves the square plate 704 downward, allowing the insertion rod 705 to be inserted into the sewage hole 4, preventing blockage. The collection box 8 collects any small amount of sewage leaking from the right side of the push plate 204 and discharges it into the sewage tank 501 via the connecting pipe 9, preventing sewage from contaminating the right side of the push plate 204.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A wet waste compression mechanism for a compression garbage truck, comprising a truck body (1), characterized in that: The carriage (1) is equipped with a material pushing mechanism (2), a sewage hole (4), a collection mechanism (5) and an anti-blocking mechanism (7). The sewage hole (4) is located at the bottom of the carriage (1); The pushing mechanism (2) includes a housing (201), a hydraulic cylinder (202), a cover plate (203), a push plate (204), and a slide bar (205). The push plate (204) is slidably connected to the inside of the carriage (1). The housing (201) is fixedly installed on the right side of the inner wall of the carriage (1), and the hydraulic cylinder (202) is fixedly installed inside the housing (201). The output end of the hydraulic cylinder (202) extends through the left side of the inner wall of the housing (201) to the outside of the housing (201) and is fixedly connected to the right outer wall of the push plate (204).

2. The wet waste compression mechanism for a compression garbage truck according to claim 1, characterized in that: The output end of the cylinder (202) is movably connected to the outer shell (201). The cover plate (203) is fixedly installed on the top of the outer shell (201) by bolts. The slide bar (205) is fixedly installed on the front and rear sides of the inner wall of the carriage (1). The push plate (204) has a sliding opening on the front and rear sides. The slide bar (205) passes through the sliding opening and slides in connection with the sliding opening.

3. The wet waste compression mechanism for a compression garbage truck according to claim 1, characterized in that: The collection mechanism (5) includes a sewage tank (501), a frame (502), a box (503), a fixing plate (504), a handle (505), and a sewage pipe (506). The sewage tank (501) is fixedly installed at the bottom of the vehicle body (1) with its opening facing upwards. The sewage hole (4) is located directly above the sewage tank (501). The sewage pipe (506) is connected to the front of the sewage tank (501) and is equipped with a control valve.

4. The wet waste compression mechanism for a compression garbage truck according to claim 3, characterized in that: The frame (502) is fixedly installed inside the sewage tank (501), and the box (503) is set on the top of the frame (502). A rectangular groove is opened on the right side of the sewage tank (501), and a through hole is opened on the left side of the inner wall of the rectangular groove. The box (503) extends through the through hole into the inside of the sewage tank (501), and the box (503) is slidably connected to the through hole and the sewage tank (501). The fixing plate (504) is fixedly installed on the right side of the box (503) and inserted into the inside of the rectangular groove. A sieve hole is opened at the bottom of the box (503), and the handle (505) is fixedly installed on the right side of the fixing plate (504).

5. The wet waste compression mechanism for a compression garbage truck according to claim 3, characterized in that: A limiting mechanism (6) is provided on the right side of the sewage tank (501). The limiting mechanism (6) includes a fixing hole (601), a fixing rod (602), a rack (603), a connecting plate (604), a limiting rod (605), a gear (606), a connecting rod (607), a motor (608), and a mounting plate (609). The fixing hole (601) is opened on the handle (505). The fixing rod (602) is inserted into the inside of the fixing hole (601), and its bottom is fixedly connected to the top of the rack (603). The rack (603) is meshed with the gear (606).

6. The wet waste compression mechanism for a compression garbage truck according to claim 5, characterized in that: The connecting plate (604) is fixedly installed on the left side of the rack (603), and the limiting rod (605) is fixedly installed on the right side of the sewage tank (501), and slides through the connecting plate (604) and is connected to the connecting plate (604).

7. The wet waste compression mechanism for a compression garbage truck according to claim 6, characterized in that: The mounting plate (609) is fixedly installed on the right side of the sewage tank (501), the motor (608) is fixedly installed on the front side of the mounting plate (609), and the connecting rod (607) is fixedly installed on the output end of the motor (608). The gear (606) is fixedly installed on the front end of the connecting rod (607).

8. The wet waste compression mechanism for a compression garbage truck according to claim 1, characterized in that: The anti-blocking mechanism (7) includes a horizontal plate (701), an electric push rod (702), an L-shaped plate (703), a square plate (704), an insert rod (705), and a vertical rod (706). The horizontal plate (701) is fixedly installed on the right side of the push plate (204), and the electric push rod (702) is fixedly installed at the bottom of the horizontal plate (701). The L-shaped plate (703) is fixedly installed at the top of the square plate (704), and its top is fixedly connected to the output end of the electric push rod (702). The insert rod (705) is fixedly installed at the bottom of the square plate (704), and the vertical rod (706) is fixedly installed at the bottom of the horizontal plate (701) and slides through the L-shaped plate (703).

9. A wet waste compression mechanism for a compression garbage truck according to claim 3, characterized in that: The right side of the carriage (1) is provided with a door panel (3), and a water collection box (8) is provided at the bottom. A connecting pipe (9) is provided between the water collection box (8) and the sewage tank (501).

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