CN212269644U - Sanitation car sewage circulating system and sanitation car - Google Patents

Abstract

The utility model relates to the technical field of road sanitation vehicles, and discloses a sanitation vehicle sewage circulating system and a sanitation vehicle, which comprise a primary filtering backwashing device and a fine filtering backwashing device; elementary filtration anti-washing unit includes that one-level filters piece, second grade filter piece and recoil subassembly, the fine filtration anti-washing unit includes cyclone subassembly, stores up dirty pipe and recoil subassembly, through one-level filters piece, second grade filter piece and cyclone subassembly can carry out the multichannel filtration to sewage, can effectively filter the filth in the sewage, makes sewage can recycle to, elementary filtration anti-washing unit and fine filtration anti-washing unit all include the recoil subassembly, can be right one-level filters piece, second grade filter piece and stores up dirty pipe and washes, can effectively prevent that one-level filtration piece, second grade filter piece and store up dirty pipe and block up, 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 dirt through spraying water smoke, therefore the quantity of water is all bigger, consequently, 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:

the filtering effect of the filtering system is poor, and the sewage can be used after being diluted by clean water after being filtered, so that the demand for the clean water is still high. Moreover, the filtering system is easy to block, frequent cleaning and maintenance are needed, and the pressure of later maintenance is high.

SUMMERY OF THE UTILITY MODEL

Therefore, a sewage circulating system of the sanitation vehicle is needed to be provided for solving the technical problems that the filtering effect of the filtering system in the prior art is poor and the filtering system is easy to block.

To achieve the above object, the inventor provides a sanitation vehicle sewage circulating system, comprising: a primary filtering backwashing device and a fine filtering backwashing device;

the primary filtering and backwashing device comprises a sewage pump, a primary filtering piece, a secondary filtering piece and a backwashing component;

the primary filter element is arranged in front of the secondary filter element, and sewage sequentially passes through the primary filter element and the secondary filter element;

the sewage pump is used for pumping the sewage at the bottom of the storage bin to the primary filter element and the secondary filter element;

the backflushing assembly is arranged behind the secondary filter element and is used for jetting backflushing water flow to the secondary filter element and the primary filter element, and the flow direction of the backflushing water flow is opposite to the sewage filtering direction;

the fine filtering backwashing device comprises a cyclone component, a sewage storage pipe and a backwashing 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 bottom of the cyclone component is connected with the sewage storage pipe;

the backflushing assembly comprises a control valve, and the control valve is connected with the sewage storage pipe and is used for injecting flushing water flow into the sewage storage pipe.

Furthermore, the control valve is a switching valve and comprises a water inlet end, a first water outlet end and a second water outlet end, the water inlet end of the control valve is connected with the water outlet end of the cyclone component, the first water outlet end of the control valve is connected with a clean water tank of the sanitation truck, the second water outlet end of the control valve is connected with the sewage storage pipe through a pipeline, and a sewage discharge end of the sewage storage pipe is provided with a sewage discharge valve.

Further, the cyclone assembly comprises a primary cyclone 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 the sewage storage pipe.

Further, the backflushing assembly of the primary filtering backflushing device comprises a rotating shaft, a rotating 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.

Furthermore, the recoil assembly further comprises an extension pipe, one end of the extension pipe is arranged on the side face of the rotating shaft and is communicated with the hollow part of the rotating shaft, the tail end of the extension pipe is close to the secondary filter piece, and the nozzle is arranged at the tail end of the extension pipe.

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 water supply pipeline comprises a clean water pump, a water inlet end of the clean water pump is connected with a water outlet end of the fine filtration backwashing device, and a water outlet end of the clean water pump is connected with the rotary joint.

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

Further, the primary filtering backwashing device is arranged inside the storage bin.

In order to solve the technical problem, the utility model provides another technical scheme again:

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, and this 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 includes primary filter back flush unit and fine filtration back flush unit, primary filter back flush unit includes that one-level filters piece, second grade filter piece and recoil subassembly, fine filtration back flush unit includes cyclone subassembly, stores up dirty pipe and recoil subassembly, through one-level filter piece, second grade filter piece and cyclone subassembly can carry out the multichannel filtration to sewage, can effectively filter the filth in the sewage, make sewage can recycle, and primary filter back flush unit and fine filtration back flush unit all include the recoil subassembly, can be right one-level filter piece, second grade filter piece and store up dirty pipe and wash, can effectively prevent that one-level filter piece, second grade filter piece and store up dirty pipe jam, greatly reduced the later maintenance frequency.

Drawings

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

FIG. 4 is a side view of a sanitation truck sewage cycle system according to an embodiment (hidden subframe and wheels;

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 filter element;

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 backwashing 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 control valve;

25. a water supply pipe;

3. a clear water tank;

4. a storage bin;

41. a bin gate;

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. 1 to 5, the present embodiment provides a sewage circulating system of a sanitation vehicle. As shown in fig. 1, which is a schematic structural diagram of a sanitation vehicle sewage circulating system according to an embodiment, the sanitation vehicle sewage circulating system is disposed on a chassis 100 of a sanitation vehicle, and the sanitation vehicle 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 further 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 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 and a vacuum device, the negative pressure suction nozzle is communicated with the vacuum device and the storage bin through a pipeline, the vacuum device enables the negative pressure suction nozzle to generate suction, and garbage and cleaning sewage are collected into the storage bin.

As shown in fig. 1, the sanitation vehicle sewage circulating system comprises a primary filtering backwashing device 1 and a fine filtering backwashing 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 backwashing 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 and backwashing device 1 comprises a sewage pump 16, a primary filtering piece 11, a secondary filtering piece 12 and a backwashing assembly 13. The sewage pump 16 is used for pumping the sewage in the storage bin 4 to the primary filter member 11 and the secondary filter member 12 for filtering, and the filtered water is conveyed to the fine filtering and backwashing device 2 for further filtering by 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.

As shown in fig. 1 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 and backwashing 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 filter member 11 and then enters the second-stage filter member 12 for filtering, and then flows out from the water outlet end of the second-stage filter member 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 11 is a mesh filter, which can be made with filtering holes (larger holes) on a metal plate and then bent into a wedge shape (but the name is not a wedge filter according to the bending shape), the secondary filter 12 is a wedge-type mesh filter, and the shape of the wedge-type mesh wire of the wedge-type mesh filter is a wedge shape, so that the wedge-type mesh filter can filter more than 0.5 of materials. Leave the clearance between mesh filter piece and the wedge type screen cloth to 11 and the filterable material of second grade filter piece of first grade filter piece 11 bottom fluting discharges are filtered to the first grade, prevent that sewage material from hardening the jam. 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.

The backflushing component 13 is arranged at the rear of the secondary filter element (the rear is in front of the filter element without being filtered and is behind the filter element) and is used for spraying backflushing water flow to the secondary filter element and the primary filter element, and the flow direction of the backflushing water flow is opposite to the sewage filtering direction. Recoil subassembly 13 is connected in the delivery pipe, provides the backwash rivers by the delivery pipe, and the direct spraying of backwash rivers is done and is filtered 12 to the second grade to filter the piece with second grade and go up adnexed impurity and clear away, partial backwash rivers pass second grade and filter 12 and act on one-level and filter 11, thereby filter 11 with the one-level and go up adnexed impurity and clear away, thereby prevent that one-level from filtering 11 and second grade and filtering 12 jam.

After being filtered by the coarse filtration backwashing device 1, the sewage is pumped to the fine filtration backwashing device 2 by a sewage pump 16, and as shown in fig. 3, the fine filtration backwashing 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 control valve 24, the control valve 24 is connected with the sewage storage pipe 23, and the control 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-mentioned embodiment, through one-level filter piece 11, the second grade filter piece 12 and swirler subassembly can carry out the multichannel to sewage and filter, can effectively filter the filth in the sewage, can also recycle under the condition that does not add the clear water dilution with sewage, has improved sanitation car clear water availability factor greatly. And, above-mentioned primary filter back flush mounting 1 and fine filtration back flush mounting 2 all include the recoil subassembly, can be right the one-level filters piece 11, secondary filter piece 12 and stores up dirty pipe 23 and washes, can prevent effectively that the one-level from filtering piece 11, secondary filter piece 12 and storing up dirty pipe 23 and blockking up, greatly reduced the later maintenance frequency.

As shown in fig. 1 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 merged by an overflow pipe 221, and the control valve 24 is disposed at the water outlet end of the overflow pipe 221. 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. In the present embodiment, the pressure and flow rate of the fine filtration backwashing device 2 are adjusted to achieve a filtration accuracy of the fine filtration backwashing device 2 of 5 to 30 um. 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 control valve 24 is provided at the water outlet end of the overflow pipe 221, and the control valve 24 is a switching valve, in order to control the transfer of the filtered clean water to the clean water tank 3 and the flush/dirty storage pipe 23. The switching valve comprises a water inlet end, a first water outlet end and a second water outlet end, wherein the water inlet end can be controlled to be connected with the first water outlet end or switched to be connected with 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 control valve 24 controls the water inlet end to be communicated with the first water outlet end, the clean water in the overflow pipe 221 is delivered into the clean water tank 3, after the fine filtering backwashing device 3 operates for a period of time, the water inlet end can be switched to be communicated 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 control valve 24 is selected as a switching valve having two water outlets, so that one control valve 24 can be used to control the connection of the fine filtration backwashing apparatus 2 with the clean water tank 3 and the flushing of the sewage storage pipe 23. 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. 1 and 2, in the present embodiment, the backflushing assembly of the primary filtration backflushing apparatus 1 is a rotary type flushing apparatus including 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. 1, 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 and backwashing device 2 (i.e., connected to the overflow pipe 221 of the fine filtering and backwashing 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 and backwashing device 2 into the rotary shaft 132 for backwashing of the secondary filter element 12 and the primary filter 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 backwashing device, and the first-stage cyclone 21 and the second-stage cyclone group 22 reach the set pressure and flow rate by adjusting the load of the system outlet, so that the fine-filtering backwashing device can reach 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 control 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. 1, a sanitation truck is provided, which comprises a chassis truck 100, a cleaning operation device, a storage bin 4 and a clean water tank 3, wherein the clean water tank 3 is connected with the cleaning operation device and is used for supplying water to the cleaning operation 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 backwashing device and a fine filtering backwashing device;

the primary filtering and backwashing device comprises a sewage pump, a primary filtering piece, a secondary filtering piece and a backwashing component;

the primary filter element is arranged in front of the secondary filter element, and sewage sequentially passes through the primary filter element and the secondary filter element;

the sewage pump is used for pumping the sewage at the bottom of the storage bin to the primary filter element and the secondary filter element;

the backflushing assembly is arranged behind the secondary filter element and is used for jetting backflushing water flow to the secondary filter element and the primary filter element, and the flow direction of the backflushing water flow is opposite to the sewage filtering direction;

the fine filtering backwashing device comprises a cyclone component, a sewage storage pipe and a backwashing 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 bottom of the cyclone component is connected with the sewage storage pipe;

the backflushing assembly comprises a control valve, and the control valve is connected with the sewage storage pipe and is used for injecting flushing water flow into the sewage storage pipe.

2. The sanitation vehicle sewage circulation system of claim 1, wherein the control valve is a switching valve and comprises a water inlet end, a first water outlet end and a second water outlet end, the water inlet end of the control valve is connected with the water outlet end of the cyclone assembly, the first water outlet end of the control valve is connected with a clean water tank of the sanitation vehicle, the second water outlet end of the control valve is connected with the sewage storage pipe through a pipeline, and the sewage discharge end of the sewage storage pipe is provided with a sewage discharge valve.

3. The sanitation vehicle sewage circulation system of claim 1, wherein the cyclone assembly comprises a primary cyclone and two or more 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 the sewage storage pipe.

4. The sanitation vehicle sewage circulation system of claim 1, wherein the backflushing assembly of the primary filtration backflushing device includes a rotating shaft, a rotating 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.

5. The sanitation vehicle sewage circulation system of claim 4, wherein the backflushing assembly further comprises an extension pipe, one end of the extension pipe is arranged on the side surface of the rotating shaft and is communicated with the hollow part of the rotating shaft, the tail end of the extension pipe is close to the secondary filter member, and the nozzle is arranged at the tail end of the extension pipe.

6. The sanitation vehicle sewage circulation system of claim 4, 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.

7. The sanitation vehicle sewage circulation system of claim 4, wherein the water supply line comprises a clean water pump, a water inlet end of the clean water pump is connected with a water outlet end of the fine filtration backwashing device, and a water outlet end of the clean water pump is connected with the rotary joint.

8. The sanitation vehicle sewage circulation system of claim 1, wherein the primary filter is a mesh filter and the secondary filter is a wedge screen filter.

9. The sanitation vehicle sewage circulation system of claim 1, wherein the primary filtration backwash device is disposed inside the storage bin.

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.

Images