CN212175650U - Sanitation car sewage circulating system and sanitation car - Google Patents

Abstract

The utility model relates to a way sanitation car technical field discloses a sanitation car sewage circulating system and sanitation car includes: a primary filtering back-flushing device and a fine filtering device; the primary filtering backwashing device is arranged on the inner side of a bin door of a storage bin of the sanitation vehicle, and the bin door can turn over towards the outer side of the storage bin; the primary filtering backwashing device comprises a sewage pump, a filtering component and a backwashing component; the backflushing assembly is arranged opposite to the filtering assembly and is used for jetting a backflushing water flow to the filtering assembly; the fine filtering device comprises a cyclone component, the water inlet end of the cyclone component is connected with the water outlet end of the primary filtering and backwashing device, and the water outlet end of the cyclone component is connected with the clean water tank of the sanitation truck. Wherein, the back flush device of elementary filtration overturns to the storage silo outside along with the door, conveniently clears up the maintenance to, the back flush subassembly can carry out the back flush to filtering component, thereby effectively prevents filtering component jam, greatly reduced the later maintenance frequency.

Description

Sanitation car sewage circulating system and sanitation car

Technical Field

The utility model relates to a way sanitation car technical field especially relates to sewage circulating system of sanitation car.

Background

The sanitation vehicle is a special vehicle specially designed for cleaning urban roads, and the appearance of the sanitation vehicle greatly improves the road surface cleaning efficiency. The sanitation vehicle usually uses high-pressure water to wash the road surface when the operation, or presses down the dirt through spraying water smoke, therefore the quantity of water all is bigger, therefore traditional sanitation vehicle all is provided with great clear water tank to need come and go to add water many times when the operation, influence the operating efficiency.

In order to solve the problem of water consumption of sanitation vehicles, patent CN 201704664 discloses a "sewage recycling road sweeper", which filters and recycles sewage through a filtering system. Patent CN 201704664 improves the working efficiency of sanitation vehicle to some extent, but still has the following problems:

filtration system easily blocks up, needs frequent clearance to maintain to filtration system sets up inside the storage silo, and the staff need get into the storage silo and just can clear up the maintenance, is not convenient for clear up the maintenance.

SUMMERY OF THE UTILITY MODEL

Therefore, a sanitation vehicle sewage circulating system is needed to be provided for solving the technical problems that the sanitation vehicle sewage circulating system is easy to block and inconvenient to clean and maintain.

To achieve the above objects, the present invention provides a sewage circulating system of a sanitation vehicle, including: a primary filtering back-flushing device and a fine filtering device;

the primary filtering backwashing device is arranged on the inner side of a bin door of a storage bin of the sanitation vehicle, the storage bin is used for temporarily storing garbage, and the bin door is hinged to the side wall of the storage bin and can be turned over towards the outer side of the storage bin;

the primary filtering backwashing device comprises a sewage pump, a filtering component and a backwashing component, wherein the sewage pump is used for pumping sewage in the storage bin to the filtering component; the backflushing assembly is arranged opposite to the filtering assembly and is used for jetting a backflushing water flow to the filtering assembly;

the fine filtering device comprises a cyclone component, the water inlet end of the cyclone component is connected with the water outlet end of the primary filtering and backwashing device, and the water outlet end of the cyclone component is connected with a clean water tank of the sanitation truck.

Furthermore, the water inlet end of the cyclone component is detachably connected with the water outlet end of the primary filtering and backwashing device through a flexible connecting pipe, or the water inlet end of the cyclone component is detachably connected with the water outlet end of the primary filtering and backwashing device.

Further, the storage bin is arranged at the tail of the sanitation truck, the bin gate is arranged on the side wall of the tail of the storage bin, and the clean water tank is arranged in front of the storage bin.

Further, the filtering component of the primary filtering and backwashing device comprises a primary filtering piece and a secondary filtering piece, the primary filtering piece and the secondary filtering piece are arranged at the front and the back at intervals, and a sewage draining channel is arranged below the primary filtering piece and the secondary filtering piece.

Furthermore, the primary filter member is a mesh filter member, and the secondary filter member is a wedge-shaped screen filter member.

Further, the recoil assembly includes a rotating shaft, a rotary joint, and a plurality of nozzles;

the rotating shaft is of a hollow structure capable of axially rotating and is connected with a water supply pipeline through the rotating joint;

the plurality of nozzles are connected to the rotating shaft, communicated with the hollow part of the rotating shaft and used for spraying reverse flushing water flow to the secondary filter member and the primary filter member.

Further, the recoil assembly further comprises a driving power, a transmission belt and a belt pulley;

the belt pulley with rotation axis fixed connection, drive power passes through driving belt with the belt pulley is connected.

Furthermore, the cyclone component comprises a primary cyclone, a sewage storage pipe and more than two secondary cyclones;

the water inlet end of the primary cyclone is connected with the water outlet end of the primary filtering and backwashing device, and the water outlet end of the primary cyclone is respectively connected with the water inlet end of the secondary cyclone through an overflow pipe;

the bottoms of the primary cyclone and the secondary cyclone are respectively connected with a sewage storage pipe.

Furthermore, one end of the sewage storage pipe is provided with a switching valve, the other end of the sewage storage pipe is provided with a sewage discharge valve, the water inlet end of the switching valve is connected with the water discharge end of the secondary cyclone, the first water outlet end of the switching valve is connected with the clean water tank, and the other two water outlet ends of the switching valve are connected with the sewage storage pipe.

In order to solve the technical problem, the utility model discloses still provide another technical scheme:

the utility model provides a sanitation car, includes chassis car, cleans operation device, storage silo and clear water tank, the clear water tank with clean the operation device and connect, be used for doing clean the operation device and supply water, the storage silo is used for keeping in and cleans rubbish, sanitation car still includes sewage circulating system, sewage circulating system be above arbitrary technical scheme sanitation car sewage circulating system.

Be different from prior art, above-mentioned technical scheme sanitation car sewage circulating system includes: a primary filtering back-flushing device and a fine filtering device; the primary filtering backwashing device is arranged on the inner side of a bin door of the storage bin, and the bin door can be hinged to the side wall of the storage bin in an outward overturning manner, so that the bin door can be overturned outwards, the primary filtering backwashing device is overturned to the outside of the storage bin, and cleaning and maintenance are facilitated. Moreover, the primary filtering and backwashing device comprises a filtering component, and the fine filtering device comprises a cyclone component, so that the sewage can be subjected to multi-layer filtering, and the filtering effect of the sewage is effectively improved; and, the back flush device of elementary filtration still includes the recoil subassembly, can carry out the backwash to filtering component to effectively prevent filtering component jam, greatly reduced the later maintenance frequency.

Drawings

FIG. 1a is a schematic structural view of a sewage circulation system of a sanitation truck according to an embodiment;

FIG. 1b is a schematic illustration of the door opening process according to an embodiment;

FIG. 2 is a schematic diagram of the primary filtration backwash assembly according to an embodiment;

FIG. 3 is a schematic structural diagram of a fine filtering apparatus according to an embodiment;

FIG. 4 is a side view of a sanitation vehicle sewage cycle system according to an embodiment (hidden subframe and wheel)

FIG. 5 is a schematic structural diagram of a rotary drive apparatus according to an embodiment; description of reference numerals:

100. a chassis truck;

1. a coarse filtration backwashing device;

11. a primary filter element;

12. a secondary ground filter;

13. a recoil assembly;

131. a spray head;

132. a rotating shaft;

133. a rotary joint;

134. a bearing;

135. a water inlet channel;

136. an extension tube;

14. a rotation driving device;

141. driving power;

142. a drive belt;

143. a belt pulley;

15. a clean water pump;

16. a sewage pump;

2. a coarse filtration washing device;

21. a primary swirler;

211. an overflow pipe;

22. a secondary cyclone;

221. an overflow pipe;

23. a sewage storage pipe;

231. a blowoff valve;

232. a connecting pipe;

24. a switching valve;

25. a water supply pipe;

3. a clear water tank;

4. a storage bin;

41. a bin gate;

42. a hydraulic cylinder;

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1a to 5, the present embodiment provides a sewage circulating system for a sanitation vehicle. As shown in fig. 1a, which is a schematic structural diagram of a sanitation truck sewage circulating system according to an embodiment, the sanitation truck sewage circulating system is disposed on a chassis 100 of a sanitation truck, and the sanitation truck further includes a cleaning device (not shown), a clean water tank 3 and a storage bin 4. The clean water tank 3 is connected with the cleaning operation device through a water supply device such as a water pump and a water pipe and is used for supplying water to the cleaning operation device; the storage bin 4 is used for temporarily storing garbage and sewage collected by the cleaning operation device; the sewage circulating system is used for filtering sewage in the storage bin, so that the sewage is recycled, and the clear water utilization rate and the operation efficiency of the sanitation truck are improved.

The chassis 100 is provided with a power mechanism and a traveling mechanism, and the power mechanism can provide power for the traveling mechanism and a sewage circulating system and a cleaning operation device on the chassis 100. In the present embodiment, the chassis 100 is a conventional chassis, and the power mechanism includes an internal combustion engine, and the power mechanism is driven by the internal combustion engine to operate. In other embodiments, the chassis 100 may also be an electric chassis, which includes a power battery and a driving motor, and the driving motor is powered by the power battery, a cleaning device, a sewage circulation system, and the like.

In this embodiment, clean the operation device and include high pressure nozzle, high pressure nozzle sets up towards the road surface, and high pressure nozzle passes through high pressure water pump and water pipe and is connected with clear water tank 3, and the clear water gets into high pressure nozzle and produces the high-pressure water column and washes the clear water to the road surface after being pressurized by high pressure water pump. In another embodiment, the cleaning operation device may include a rotary sweeping plate and a spray dust-settling device, the spray dust-settling device is disposed beside the rotary sweeping plate, and the clean water tank 3 is connected to the spray dust-settling device through a water pump and a pipeline. During cleaning operation, the road surface can be cleaned through the rotary cleaning disc, and the road surface is dusted through the spraying dustfall device. The cleaning operation device also comprises a negative pressure suction nozzle which is arranged to be attached to the road surface. The chassis truck 100 is further provided with a storage bin 4 and a vacuum device, the negative pressure suction nozzle is communicated with the vacuum device and the storage bin 4 through a pipeline, the vacuum device enables the negative pressure suction nozzle to generate suction, and garbage and sewage generated by cleaning are collected into the storage bin 4.

As shown in fig. 1a and fig. 1b, the sewage circulation system of the sanitation vehicle comprises a primary filtering backwashing device 1 and a fine filtering device 2, and sewage at the bottom of a storage bin 4 is filtered by the primary filtering backwashing device 1 and the fine filtering device 2 in sequence and then enters a clean water tank 3, so that the sewage recovered by cleaning operation can be recycled.

The primary filtering backwashing device 1 is fixedly arranged on the inner side of a bin door 41 of a storage bin 4 of the sanitation truck, and the bin door 41 is hinged on the side wall of the storage bin 41 and can be turned over towards the outer side of the storage bin 4. The hinge structure of the bin gate 41 can be arranged at the upper edge of the bin gate, a hydraulic oil cylinder 42 is further arranged between the bin gate 41 and the storage bin 4, one end of the hydraulic oil cylinder 42 is hinged to the bin gate 41, the other end of the hydraulic oil cylinder 42 is hinged to the storage bin, and the bin gate 41 is driven to turn upwards through the hydraulic oil cylinder 42. When the other door 41 is turned outwards, the primary filtering and backwashing device 1 arranged on the inner side of the bin door 41 is also turned to the outside of the storage bin 4 along with the bin door 41, so that the primary filtering and backwashing device 1 is convenient to clean and maintain. In other embodiments, the hinge structure of the door 41 is disposed at the left and right edges of the door, so that the door 41 can be horizontally turned outwards. And the driving cabin door is overturned, and other driving devices such as an electric push rod, a pneumatic telescopic rod and the like can be selected besides the hydraulic oil cylinder 42.

As shown in fig. 1a and 1b, the storage bin 4 is disposed at the rear of the sanitation truck, the clean water tank 3 is disposed in front of the storage bin, and the bin gate 41 is disposed on the side wall at the rear of the storage bin 4. In this embodiment, the bin gate 41 is located at the tail of the sanitation truck, so that on one hand, the garbage in the storage bin 4 can be conveniently transferred, and on the other hand, when the bin gate 41 is turned outwards, enough space is provided for workers to clean and maintain the primary filtering backwashing device 1.

As shown in fig. 1a and 2, the primary filtration backwash assembly 1 includes a sewage pump 16, a filter assembly and a backwash assembly 13. Wherein, the filtering component comprises a primary filtering piece 11 and a secondary filtering piece 12, the sewage pump 16 is used for pumping the sewage in the storage bin 4 to the primary filtering piece 11 and the secondary filtering piece 12 for filtering, and the filtered water is conveyed to the fine filtering device 2 for further filtering through the water pressure provided by the sewage pump 16. The back-flushing component 13 is used for back flushing the first-stage filter piece 11 and the second-stage filter piece 12, and flushing the garbage attached to the first-stage filter piece 11 and the second-stage filter piece 12 to prevent the first-stage filter piece 11 and the second-stage filter piece 12 from being blocked. In the present embodiment, the filter assembly includes a primary filter member 11 and a secondary filter member 12.

As shown in fig. 1a and fig. 2, in particular, the primary filter member 11 and the secondary filter member 12 are disposed at the inner bottom of the storage bin 4, so that the sewage at the bottom of the storage bin 4 can enter the primary filter member 11 and the secondary filter member 12. The primary filter member 11 is arranged in front of the secondary filter member 12 in the filtering direction, the secondary filter member 12 has a water outlet end, and the sewage pump 16 is connected to the water outlet end of the secondary filter member 12 through a pipeline. The water outlet end of the sewage pump 16 is connected with the water inlet end of the fine filtering device 2 through a pipeline, so that due to the pumping of the sewage pump 16, sewage at the bottom of the storage bin 4 is filtered by the first-stage filtering piece 11 and then enters the second-stage filtering piece 12 for filtering, and then flows out from the water outlet end of the second-stage filtering piece 12.

Wherein, the first order is filtered the filter fineness of 11 and is less than the precision that the second grade filtered piece 12, and the great impurity of volume is filtered by the first order by 11 filtration of filtration pieces in the sewage, and the second grade filters the less impurity of sewage volume of 12 filtration. Preferably, in this embodiment, the primary filter member 11 is a mesh filter member, the mesh filter member can be made with filter holes (with larger holes) on a metal plate, and then bent to be wedge-shaped (but the name is not to be named as a wedge-shaped filter according to the bending shape), the secondary filter member 12 is a wedge-shaped screen filter member, the shape of the wedge-shaped screen steel wire of the wedge-shaped over-screen filter member is wedge-shaped, so that the wedge-shaped screen filter member is named as a wedge-shaped screen filter member, the wedge-shaped screen filter member can filter materials larger than 0.5, a gap is left between the mesh filter member and the wedge-shaped screen, and the materials filtered by the primary filter member 11 and the secondary filter member can be discharged through the slot at the bottom of the primary filter member. In the embodiment, the primary filter member 11 and the secondary filter member are combined by the mesh filter member and the wedge-shaped screen filter member, so that the filter has the advantages of small occupied volume and high filter precision, and can improve the filter precision in a limited space; materials with the diameter of more than 0.5mm in the sewage can be intercepted, so that the materials are deposited in the sewage bin, the filtering burden of a subsequent cyclone is reduced, and the service life of each element of the system is prolonged; because the filtering holes of the mesh filtering piece are larger, the blocking probability is reduced, if the wedge-shaped mesh filtering piece is blocked, the wedge-shaped mesh filtering piece can be directly washed by water, passes through the meshes, washes attached materials, and has a simple blocking treatment method.

In other embodiments, the primary filter member 11 and the secondary filter member 12 may be made of a steel wire mesh with a larger mesh and a wedge-shaped mesh.

In other embodiments, the filter assembly may be provided with only one filter element, or the filter assembly may be provided with more than three filter elements, depending on the filtering requirements.

The backflushing component 13 is arranged behind the secondary filter component 12 (the rear part is in front of the filter component without being filtered and is behind the filter component) and used for spraying backflushing water flow to the secondary filter component 12 and the primary filter component 11, and the flow direction of the backflushing water flow is opposite to the sewage filtering direction. The recoil assembly 13 is connected in the delivery pipe 25, provides the backflush rivers by the delivery pipe, and the backflush rivers do and directly spout to second grade and filter piece 12 to clear away adnexed impurity on the second grade filtration piece 12, partial backflush rivers pass second grade filtration piece 12 and act on first grade filtration piece 11, thereby clear away adnexed impurity on the first grade filtration piece 11, thereby prevent that first grade filtration piece 11 and second grade filtration piece 12 from blockking up.

After being filtered by the coarse-stage filtering backwashing device 1, the sewage is pumped to the fine filtering device 2 by a sewage pump 16, and as shown in fig. 3, the fine filtering device 2 comprises a cyclone assembly, a sewage storage pipe 23 and a backwashing assembly. Wherein, the swirler subassembly is used for further filtering the sewage of coarse filtration, and the swirler subassembly includes one-level swirler 21 at least, and the end of intaking of one-level swirler 21 passes through the pipeline and is connected with the play water end of sewage pump 16, and the bottom of one-level swirler 21 is connected with storing up dirty pipe 23. The cyclone carries out centrifugal sedimentation on sewage through a centrifugal sedimentation principle, so that the dirt in the sewage sinks under the action of centrifugal force, the suspended fine dirt in the sewage can be filtered, and the dirt generated by filtering the primary cyclone 21 is discharged into the dirt storage pipe 23 from the bottom.

The backflushing assembly comprises a switching valve 24, the switching valve 24 is connected with the sewage storage pipe 23, and the switching valve 24 is used for injecting flushing water flow into the sewage storage pipe 23, so that the pollutants in the sewage storage pipe 23 are discharged, and the blockage of the sewage storage pipe 23 is prevented.

In the above embodiment, the primary filtering backwashing device 1 is arranged on the bin gate 41 of the storage bin 4, the primary filtering backwashing device 1 can be overturned outwards along with the bin gate 41, so that the cleaning and the maintenance are convenient, and the primary filtering backwashing device 1 and the fine filtering device 2 are arranged in the above embodiment, so that sewage can be subjected to multi-channel filtering, the dirt in the sewage can be effectively filtered, the sewage can be recycled under the condition of not diluting with clean water, and the clean water use efficiency of the sanitation truck is greatly improved. Moreover, the primary filtering and backwashing device 1 comprises a backwashing component, the primary filtering piece 11, the secondary filtering piece 12 and the sewage storage pipe 23 can be washed, the filtering component can be effectively prevented from being blocked, and the later maintenance frequency is greatly reduced.

In the present embodiment, in order to facilitate the outward turning of the bin gate 41, the primary filtering and backwashing device 1 also turns along with the bin gate 41, and the primary filtering and backwashing device 1 and the fine filtering device 2 are connected by a flexible connecting pipe, and the flexible connecting pipe is reserved with a sufficient length. Specifically, the water inlet end of the cyclone assembly is connected with the water outlet end of the primary filtering and backwashing device through a flexible connecting pipe, and the flexible connecting pipe can be a rubber pipe or a canvas pipe.

In other embodiments, the piping between primary filter backwash assembly 1 and fine filter assembly 2 is removably attached to facilitate the primary filter backwash assembly 1 also tipping with the door 41. Namely, the water inlet end of the cyclone component is detachably connected with the water outlet end of the primary filtering and backwashing device. Before the bin gate 41 is turned over, the pipeline between the primary filtering and backwashing device 1 and the fine filtering device 2 can be detached, and after the bin gate 41 is closed, the pipeline between the primary filtering and backwashing device 1 and the fine filtering device 2 is butted. Preferably, in order to facilitate the pipeline connection between the primary filtration and backwashing device 1 and the fine filtration device 2, the pipeline between the primary filtration and backwashing device 1 and the fine filtration device 2 is connected through a quick coupling.

As shown in fig. 1a and 3, in the present embodiment, the cyclone assembly further includes two or more secondary cyclones 22, the two or more secondary cyclones 22 are arranged in parallel, the water outlet end of the primary cyclone 21 is connected to the water inlet end of the second cyclone 22 through an overflow pipe 211, the water outlet ends of the secondary cyclones 22 are converged through an overflow pipe 221, and the outflow end of the overflow pipe 221 is provided with the switching valve 24. Wherein, the filtering precision of the secondary cyclone 22 is higher than that of the primary cyclone 21; the primary cyclone 21 has a larger volume than the secondary cyclone 22, and the smaller the volume of the cyclone, the higher the filtration accuracy. The switching valve 24 is disposed at the water outlet end of the overflow pipe 221, and the switching valve includes a water inlet end, a first water outlet end and a second water outlet end, wherein the controllable water inlet end is connected to the first water outlet end or switched to the water inlet end to be connected to the second water outlet end. The water inlet end of the switching valve is connected with an overflow pipe 221, the first water outlet end of the switching valve is connected with the clean water tank 3 through a pipeline, the second water outlet end of the switching valve is connected with the sewage storage pipe 23 through a connecting pipe 232, and the discharge end of the sewage storage pipe is provided with a sewage discharge valve 231. When the switching valve 24 controls the water inlet end to communicate with the first water outlet end, the clean water in the overflow pipe 221 is delivered to the clean water tank 3, after the fine filtering device 3 operates for a period of time, the water inlet end can be switched to communicate with the second water outlet end, and the drain valve 231 is opened, so that the clean water in the overflow pipe 221 is injected into the sewage storage pipe 23 through the connecting pipe 232 to flush the sewage flow pipe 23. In the present embodiment, the fine filter device 2 can achieve a filtration accuracy of 5 to 30um by adjusting the pressure and flow rate of the fine filter device 2. In this embodiment, adopt the one-level swirler to connect a plurality of second grade swirlers that parallel, the filter fineness of second grade swirler is high, small, adopts a plurality of second grade swirlers to be connected with the one-level swirler, can guarantee filterable flow, has also guaranteed filter fineness simultaneously to and convenient maintenance and change.

In the present embodiment, the switching valve 24 is selected to have two water outlets, so that the connection of the fine filtering device 2 to the clean water tank 3 and the flushing of the waste storage pipe 23 can be controlled by using one switching valve 24. In other embodiments, two control valves may be provided, one for controlling the connection of the filter and backwash device 2 to the clean water tank 3 and the other for flushing the sewage storage pipe 23.

As shown in fig. 1a and 2, in the present embodiment, the backflushing assembly of the primary filtration backflushing apparatus 1 is a rotary type flushing apparatus which includes a rotary shaft 132, a rotary joint 133 and a plurality of nozzles 131. The rotating shaft 132 is a hollow structure (i.e., a tubular structure with a blocked end), one end of the rotating shaft 132 is a water inlet end, the water inlet end is connected to the water supply pipeline through the rotating joint 133, and the rotating shaft 132 is supported on the door 41 of the storage bin through the bearing 134, so that the rotating shaft 132 can freely rotate in the axial direction. Preferably, in order to prevent the sewage from entering the bearing 134, a sealing ring may be further provided on the outer circumference of the rotating shaft 132. The bin gate 41 can be arranged at the tail of the storage bin 4, and the bin gate 41 can be connected with the side wall of the storage bin 4 through a hinge shaft, so that the bin gate 41 can be turned over to be opened or closed. The clean water enters the middle part of the rotating shaft 132 through the water supply pipeline and the rotating joint 133, and then enters the nozzles 131, the nozzles 131 are opposite to the inner side surfaces of the secondary filter members 12, and the nozzles 131 spray the back washing water flow to back wash the secondary filter members 12 and the primary filter members 11.

As shown in fig. 2, the secondary filter member 12 is a barrel-shaped structure, the rotating shaft 132 is located on the axis of the secondary filter member 12, the rotating shaft 132 is provided with a plurality of extension pipes 136, the extension pipes 136 are hollow tubular structures, one end of each extension pipe 136 is disposed on the side surface of the rotating shaft 132 and is communicated with the hollow portion of the rotating shaft 132, the tail end of each extension pipe 136 is close to the secondary filter member 12, and the nozzle 131 is disposed at the tail end of each extension pipe 136. The flowing water in the rotary shaft 132 can be delivered to the nozzle 131 through the extension pipe 136 to wash the secondary filter member 12, and the extension pipe 136 shortens the distance between the nozzle 131 and the secondary filter member 12, thereby improving the washing effect of the reverse washing water flow.

Preferably, in order to prevent the nozzle 131 from being worn, a nozzle protecting sleeve may be further installed outside the nozzle 131, and the nozzle protecting sleeve may be made of wear-resistant material such as plastic, rubber, and the like.

As shown in fig. 4 and 5, the rotary shaft 132 is rotated in the axial direction by the rotary drive device 14 to flush the inside of the secondary filter member 12. The rotary drive device 14 includes a drive power 141, a transmission belt 142, and a pulley 143. The pulley 143 is coaxially disposed with and fixedly connected to the rotating shaft 132, the driving power 141 is connected to the pulley 143 through the transmission belt 142, and the driving power 141 drives the rotating shaft 132 to rotate through the transmission belt 142 and the pulley 143. The driving power 141 may be a rotary power device such as a driving motor or a hydraulic motor. In other embodiments, the driving power 141 may drive the rotating shaft 132 to rotate axially through a gear transmission mechanism, a chain transmission mechanism, or the like.

In other embodiments, the orientation of each nozzle 131 on the rotating shaft 132 may be set, so that the counter force of the water jet sprayed from each nozzle 131 pushes the rotating shaft 132 to rotate axially, and the rotating shaft 132 may also realize self-rotation without the rotation driving device 14.

As shown in fig. 1a, in the present embodiment, the water supply line includes a clean water pump 15, a water inlet end of the clean water pump 15 is connected to a water outlet end of the fine filtering device 2 (i.e. connected to the overflow pipe 221 of the fine filtering device 2), a water outlet end of the clean water pump 15 is connected to the rotary joint 135, and the clean water pump 15 pumps the clean water filtered by the fine filtering device 2 into the rotary shaft 132 for back flushing of the secondary filtering element 12 and the primary filtering element 11. In the embodiment, clear water after fine filtration is adopted for washing, and the clear water after fine filtration has certain water pressure, so that the input water of the clear water pump has positive pressure, the suction of the clear water pump during self-suction can be prevented from being insufficient, the suction and cavitation are caused, and the clear water pump is damaged or the service life of the clear water pump is shortened.

Under the action of gravity, large particles in the storage bin 4 of the sanitation vehicle can be deposited at the bottom of the storage bin 4. When the sewage in the storage bin 4 of the sanitation truck reaches a set water level, a sewage pump 16 is automatically operated, the sewage is filtered through a primary filter element 11 and a secondary filter element 12, and leaves, plastic bags and other materials with large size of more than 0.5mm are filtered; can filter 11 and the secondary filter piece 12 by the one-level and filter, filter 11 bottom fluting discharges of material accessible one-level filter piece that obtain, prevent that sewage material from hardening to block up.

The sewage is filtered by the coarse-stage filtering backwashing device and then is pumped to the fine filtering device, and the first-stage cyclone 21 and the second-stage cyclone group 22 reach the set pressure and flow rate by adjusting the outlet load of the system, thereby ensuring that the fine filtering device reaches the filtering precision of 5-30 um.

After the sewage pump 16 is operated for a certain period of time (for example, after one minute), the clean water pump 15 is automatically operated to pressurize, part of accumulated water in the overflow pipe 221 enters the rotary joint 133 and the rotary shaft 132 through pressurization, and then the water is rotationally sprayed through the nozzle 131, so that materials attached to the surface of the secondary filter element 12 are cleaned from inside to outside, and the smoothness of filtration is ensured.

When the sewage circulating system runs for a certain period of time (2h), the switching valve 24 and the drain valve 231 are automatically opened, the sediment in the sewage storage pipe fitting 23 is automatically washed, and the valve is automatically closed after 1min of washing is finished.

Through the test, the sanitation car installs above-mentioned sewage circulating system additional after, the operating time of a case clear water prolongs more than 4 times, if in rainy day and the road operation of tide, can prolong more than 7 times operating time to reduced sanitation car frequency of coming and going to add water, promoted the operating efficiency, also reduced operation and cost of labor simultaneously.

In other embodiments, the clean water pump 15 may also be connected to the clean water tank 3 to pump clean water in the clean water tank 3 into the rotary shaft 132 for back flushing of the secondary filter element 12 and the primary filter element 11.

As shown in fig. 1a, a sanitation vehicle is provided, which comprises a chassis 100, a cleaning device, a storage bin 4 and a clean water tank 3, wherein the clean water tank 3 is connected with the cleaning device and is used for supplying water to the cleaning device, and the storage bin 4 is used for temporarily storing and cleaning garbage. The sanitation vehicle further comprises a sewage circulating system, and the sewage circulating system is the sanitation vehicle sewage circulating system in any one of the above embodiments.

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a sanitation car sewage circulating system which characterized in that includes: a primary filtering back-flushing device and a fine filtering device;

the primary filtering backwashing device is arranged on the inner side of a bin door of a storage bin of the sanitation vehicle, the storage bin is used for temporarily storing garbage, and the bin door is hinged to the side wall of the storage bin and can be turned over towards the outer side of the storage bin;

the primary filtering backwashing device comprises a sewage pump, a filtering component and a backwashing component, wherein the sewage pump is used for pumping sewage in the storage bin to the filtering component; the backflushing assembly is arranged opposite to the filtering assembly and is used for jetting a backflushing water flow to the filtering assembly;

the fine filtering device comprises a cyclone component, the water inlet end of the cyclone component is connected with the water outlet end of the primary filtering and backwashing device, and the water outlet end of the cyclone component is connected with a clean water tank of the sanitation truck.

2. The sanitation vehicle sewage circulation system of claim 1, wherein the water inlet end of a cyclone assembly is removably connected to the water outlet end of the primary filtration backwash assembly via a flexible connecting tube, or the water inlet end of the cyclone assembly is removably connected to the water outlet end of the primary filtration backwash assembly.

3. The sanitation vehicle sewage circulation system of claim 1, wherein the storage bin is disposed at the tail of the sanitation vehicle, the bin gate is disposed on a side wall of the tail of the storage bin, and the clean water tank is disposed in front of the storage bin.

4. The sanitation vehicle sewage circulation system of claim 1, wherein the filter assembly of the primary filter backwashing device comprises a primary filter member and a secondary filter member, the primary filter member and the secondary filter member are arranged at intervals in front of and behind each other, and a sewage draining passage is arranged below the primary filter member and the secondary filter member.

5. The sanitation vehicle sewage circulation system of claim 4, wherein the primary filter is a mesh filter and the secondary filter is a wedge screen filter.

6. The sanitation vehicle sewage circulation system of claim 4, wherein the backflushing assembly includes a rotating shaft, a swivel joint and a plurality of nozzles;

the rotating shaft is of a hollow structure capable of axially rotating and is connected with a water supply pipeline through the rotating joint;

the plurality of nozzles are connected to the rotating shaft, communicated with the hollow part of the rotating shaft and used for spraying reverse flushing water flow to the secondary filter member and the primary filter member.

7. The sanitation vehicle sewage circulation system of claim 6, wherein the backflushing assembly further comprises a drive power, a drive belt and a pulley;

the belt pulley with rotation axis fixed connection, drive power passes through driving belt with the belt pulley is connected.

8. The sanitation vehicle sewage circulation system of claim 4, wherein the cyclone assembly comprises a primary cyclone, a sewage storage pipe and more than two secondary cyclones;

the water inlet end of the primary cyclone is connected with the water outlet end of the primary filtering and backwashing device, and the water outlet end of the primary cyclone is respectively connected with the water inlet end of the secondary cyclone through an overflow pipe;

the bottoms of the primary cyclone and the secondary cyclone are respectively connected with a sewage storage pipe.

9. The sanitation vehicle sewage circulation system of claim 8, wherein one end of the sewage storage pipe is provided with a switching valve, the other end of the sewage storage pipe is provided with a sewage discharge valve, a water inlet end of the switching valve is connected to a water discharge end of the secondary cyclone, a first water outlet end of the switching valve is connected to a clean water tank, and the other two water outlet ends of the switching valve are connected to the sewage storage pipe.

10. A sanitation vehicle, comprising a chassis vehicle, a cleaning operation device, a storage bin and a clean water tank, wherein the clean water tank is connected with the cleaning operation device and used for supplying water for the cleaning operation device, the storage bin is used for temporarily storing cleaned garbage, and the sanitation vehicle is characterized by further comprising a sewage circulating system, and the sewage circulating system is the sanitation vehicle sewage circulating system of any one of the above claims 1-9.

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