CN210797700U

CN210797700U - Vacuum excavation vehicle

Info

Publication number: CN210797700U
Application number: CN201921594139.8U
Authority: CN
Inventors: 陈立文; 赵自立; 刘凯; 吴伟壮; 周哲; 昃向博
Original assignee: SHANDONG ROADWAY CONSTRUCTION MACHINERY MANUFACTURING CO LTD
Current assignee: SHANDONG ROADWAY CONSTRUCTION MACHINERY MANUFACTURING CO LTD
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-06-19
Anticipated expiration: 2029-09-24

Abstract

A vacuum excavation vehicle relates to the technical field of vacuum excavation and comprises a vehicle chassis, wherein a high-pressure water jet system, a pneumatic conveying system, a material storage system, an excavation head control arm and an excavation head are arranged on the vehicle chassis, the material storage system is communicated with the pneumatic conveying system, and the vacuum excavation vehicle can be accurately positioned, performs minimally invasive excavation on the ground and is environment-friendly and free of dust; compared with the traditional excavation mode, the damage to the pipeline can be greatly reduced in the excavation process; cutting, crushing and compacting a base layer by using a high-pressure water jet system to form particles or blocky materials, and pumping air in a conveying system to form high-speed negative-pressure air flow for conveying by using a pneumatic conveying technology; the utility model discloses an in the aspect can utilize strength generating device to the pressurization of storage system through changing switching-over device position, extrude the solid-liquid mixture that storage system stored from the bin outlet, backfill the excavation position, avoid the wasting of resources, the operation is more high-efficient.

Description

Vacuum excavation vehicle

The technical field is as follows:

the utility model relates to a vacuum excavation technical field especially relates to a vacuum excavation car.

Background art:

along with the rapid development of global urbanization, municipal underground pipe network projects are more and more in extension, modification and maintenance projects. The projects are mainly excavated by a traditional excavator, so that the road surface is damaged in a large area, the environment is polluted, the traffic is blocked, pipelines are easy to hurt, and the needs of urban development are not met. Therefore, there is a need for a new excavation apparatus that can perform precise and efficient non-destructive excavation work in sensitive areas.

The current special vehicles such as a sewage suction truck, a dredging truck and the like can realize the suction, transportation and unloading of materials such as sewage, sludge, sand and stone, but cannot perform suction excavation on solid compacted materials such as a gravel base layer and a compacted soil base. In addition, some devices hope to utilize a high-performance vacuum device to generate extremely high negative pressure to generate suction force so as to perform suction excavation work, but the effect is often not good, and the suction excavation work of solid compacted materials cannot be realized. The prior art lacks a device which does not need to damage the road surface in a large area and can realize relatively accurate excavation of the area.

The utility model has the following contents:

in order to solve the technical problem, the utility model provides a vacuum excavation car can integrate the broken function with the vacuum suction of high pressure water jet, need not the large tracts of land and destroys the road surface, has realized comparatively accurate excavation to the region.

The utility model discloses a realize through following technical scheme:

the utility model provides a vacuum excavation car, characterized by includes vehicle chassis, last high-pressure water jet system, the pneumatic conveyor system, the storage system of being provided with of vehicle chassis, excavation head control arm and the excavation head, storage system and pneumatic conveyor system intercommunication.

In another aspect of the present invention, the high pressure water jet system includes a water tank, a high pressure water pump, a pressure regulating unloading valve, a hose reel, a high pressure water gun, a high pressure nozzle, a water suction pipeline, a high pressure pipeline, and an unloading pipeline, wherein the water tank is fixed on the vehicle chassis and connected with the high pressure water pump through the water suction pipeline; the rubber hose reel is fixed on the vehicle chassis and used for winding and unwinding the high-pressure pipeline; the pressure-regulating unloading valve is arranged in the middle of the high-pressure pipeline, and an unloading port of the pressure-regulating unloading valve is connected to the water tank through an unloading pipeline; the high-pressure water gun is connected with the high-pressure pipeline; the high-pressure nozzle is connected with a high-pressure water gun.

In another aspect of the utility model, the storage system comprises a lifting mechanism I, a storage tank, a connecting port, an upper suction port, a tank door actuating mechanism, a tank door, a lower suction port, a discharge port and a sealing ring, wherein the bottom of the rear end of the storage tank is hinged with a vehicle chassis; one end of the lifting mechanism I is hinged with a vehicle chassis, and the other end of the lifting mechanism I is hinged with the material storage tank; the tank door is hinged with the material storage tank; the tank door actuating mechanism is used for opening or closing the tank door; the material storage tank is provided with a connecting port and an upper suction port; the tank door is provided with a lower suction port and a discharge port; the sealing ring is embedded in the inner side of the upper suction port.

In another aspect of the present invention, the pneumatic conveying system comprises an arm pipe, a cyclone separator, a filter tank, a four-way reversing ball valve, a pneumatic generating device, a silencer, a connecting pipe and a discharging pipe, wherein the cyclone separator is connected with the filter tank through the connecting pipe, and an air suction port and an air exhaust port of the filter tank, the silencer and the pneumatic generating device are respectively connected and conducted with the four-way reversing ball valve through the connecting pipe; one end of the arm pipe is communicated with the material storage system, and the other end of the arm pipe is connected with the excavation head; the cyclone separator is connected and communicated with the material storage system through a connecting pipe.

In another aspect of the present invention, the digging head control arm includes a swing mechanism, a connecting frame, a lifting mechanism ii, a first arm, a telescopic mechanism, a second arm, a spring, a balancing stand and a gate valve; the connecting frame is rotatably fixed on the upper suction port through a rotating mechanism; the lower end of the connecting frame is provided with a guide pipe; the guide pipe extends into the upper suction port, and the outer ring is embedded in the inner side of the sealing ring; the upper end of the connecting frame is provided with a connecting bent pipe, one end of the gate valve is connected with the connecting bent pipe, and the other end of the gate valve is connected with the pneumatic conveying system; the first section arm is hinged with the connecting frame; one end of the lifting mechanism II is hinged with the connecting frame, and the other end of the lifting mechanism II is hinged with the first knuckle arm; the second joint arm is slidably inserted into the first joint arm; one end of the telescopic mechanism is fixedly connected with the first knuckle arm, and the other end of the telescopic mechanism is fixedly connected with the second knuckle arm; the first section arm and the second section arm are respectively fixed with a preset number of anti-falling frames, and the anti-falling frames are rotatably fixed with a riding wheel A and a pressing wheel A; the front end of the balancing stand is hinged to a short plate fixed to the lower end of the second knuckle arm, a spring is hung at the rear end of the second knuckle arm, the middle of the balancing stand is hung at the bottom end of the spring, and a supporting wheel B and a pressing wheel B are rotatably fixed at the rear end of the balancing stand.

In another aspect of the present invention, the pneumatic conveying system comprises an arm pipe, a cyclone separator, a filter tank, a four-way reversing ball valve, a pneumatic generating device, a silencer, a connecting pipe and a discharging pipe, wherein the cyclone separator is connected with the filter tank through the connecting pipe, and an air suction port and an air exhaust port of the filter tank, the silencer and the pneumatic generating device are respectively connected and conducted with the four-way reversing ball valve through the connecting pipe; one end of the arm pipe is connected with the gate valve, and the other end of the arm pipe is connected with the excavation head; the arm pipe can pass through the space between the supporting roller A and the pressing roller A and the space between the supporting roller B and the pressing roller B in a drawing way; the cyclone separator is connected and communicated with the connecting port through a connecting pipe.

In another aspect of the present invention, the excavating head comprises a connecting joint, a handle, a pressing plate, a water delivery rubber tube, a material suction head, a water delivery steel tube, a high pressure water gun and a high pressure nozzle, wherein the handle is fixed on the connecting joint; the connecting joint is connected with a pneumatic conveying system; the connecting joint is provided with a mounting seat, and the high-pressure water gun is fixed on the mounting seat through a pressing plate; the suction head comprises an inner suction pipe, a connecting flange, a connecting disc and an outer suction pipe; the inner suction pipe is fixed at the lower end of the suction pipe, and the connecting flange is welded on the inner suction pipe; the upper end of the connecting disc is welded with a water delivery steel pipe, the lower end of the connecting disc is provided with an inclined plane, and the inclined plane is provided with a preset number of high-pressure nozzles; an annular water channel is arranged on the outer ring of the connecting disc and is communicated with the water delivery steel pipe and the high-pressure nozzle; the outer material suction pipe is positioned outside the connecting disc and is welded with the connecting disc into a whole to seal the annular water channel; the connecting disc is fixed on the connecting flange through a bolt; the water delivery rubber pipe is communicated with the high-pressure water gun and the water delivery steel pipe; the other end of the high-pressure water gun is connected with a high-pressure pipeline.

The utility model has the advantages that: the vacuum excavation vehicle can be accurately positioned, performs minimally invasive excavation on the ground, is environment-friendly and does not raise dust; compared with the traditional excavation mode, the damage to the pipeline can be greatly reduced in the excavation process; cutting, crushing and compacting a base layer by using a high-pressure water jet system to form particles or blocky materials, and pumping air in a conveying system to form high-speed negative-pressure air flow for conveying by using a pneumatic conveying technology; the utility model discloses an in the aspect can utilize strength generating device to the pressurization of storage system through changing switching-over device position, extrude the solid-liquid mixture that storage system stored from the bin outlet, backfill the excavation position, avoid the wasting of resources, the operation is more high-efficient.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is the structural schematic diagram of the high-pressure water jet system according to the embodiment of the present invention.

Fig. 3 is a schematic view of the excavation state structure of the pneumatic conveying system of the embodiment of the present invention.

Fig. 4 is a schematic structural view of a backfill state of the pneumatic conveying system according to the embodiment of the present invention.

Fig. 5 is a structural schematic diagram of a state of a storage system according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a state two of the material storage system according to the embodiment of the present invention.

Fig. 7 is the utility model discloses an excavation arm structure sketch map.

Fig. 8 is a schematic view of an excavation head structure according to an embodiment of the present invention.

In the drawings: 1. vehicle chassis, 2, engine room, 3, high-pressure water jet system, 4, pneumatic conveying system, 5, storage system, 6, digging head control arm, 7, water tank, 8, high-pressure water pump, 9, pressure-regulating unloading valve, 10, hose reel, 11, high-pressure water gun, 12, high-pressure nozzle, 13, water suction pipeline, 14, high-pressure pipeline, 15, unloading pipeline, 16, digging head, 17, arm pipe, 18, cyclone separator, 19, filter tank, 20, four-way reversing ball valve, 21, pneumatic generator, 22, silencer, 23, connecting pipe, 24, discharge pipe, 25, lifting mechanism I, 26, storage tank, 27, connecting port, 28, upper suction port, 29, tank door actuator, 30, tank door, 31, lower suction port, 32, upper suction port, 33, swing mechanism, 34, connecting frame, 3401, conduit, 3402, connecting bent pipe, 35, lifting mechanism II, 36, discharge port actuator, 30, tank door, 31, lower suction port, 32, rotating mechanism, connecting pipe, connecting frame, 3401, conduit, The hydraulic lifting device comprises a first section arm, 37, a telescopic mechanism, 38, a second section arm, 39, a spring, 40, a balance frame, 41, a sealing ring, 42, a pinch roller A, 43, a pinch roller A, 44, a pinch roller B, 45, a pinch roller B, 46, a gate valve, 47, an anti-dropping frame, 48, a connecting joint, 49, a handle, 50, a pressing plate, 51, a water delivery rubber pipe, 52, a material suction pipe, 53, a material suction head, 5301, an inner material suction pipe, 5302, a connecting flange, 5303, a connecting disc, 5304, an outer material suction pipe, 54 and a water delivery steel pipe.

The specific implementation mode is as follows:

the following will further explain the embodiments of the present invention with reference to the drawings and examples:

in the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a vacuum excavation car, includes vehicle chassis 1, be provided with high-pressure water jet system 3, pneumatic conveyor system 4, storage system 5, excavation head control arm 6 and excavation head 16 on the vehicle chassis 1, storage system 5 and pneumatic conveyor system 4 intercommunication. Also comprises a nacelle 2, wherein the nacelle 2 comprises a frame and a covering piece. The high-pressure water jet system 3 comprises a water tank 7, a high-pressure water pump 8, a pressure-regulating unloading valve 9, a rubber hose reel 10, a high-pressure water gun 11, a high-pressure nozzle 12, a water suction pipeline 13, a high-pressure pipeline 14 and an unloading pipeline 15, wherein the water tank 7 is fixedly welded on the vehicle chassis 1 and is connected with the high-pressure water pump 8 through the water suction pipeline 13; the rubber hose reel 10 is fixed on the vehicle chassis 1 through bolts and used for winding and unwinding the high-pressure pipeline 14; the pressure-regulating unloading valve 9 is arranged in the middle of the high-pressure pipeline 14, and an unloading port of the pressure-regulating unloading valve 9 is connected to the water tank 7 through an unloading pipeline 15; the high-pressure water gun 11 is connected with a high-pressure pipeline 14; the high-pressure nozzle 12 is connected with a high-pressure water gun 11. The material storage system 5 comprises a lifting mechanism I25, a material storage tank 26, a connecting port 27, an upper suction port 28, a tank door actuating mechanism 29, a tank door 30, a lower suction port 31, a material discharge port 32 and a sealing ring 41, wherein the bottom of the rear end of the material storage tank 26 is hinged with the vehicle chassis 1; one end of the lifting mechanism I25 is hinged with the vehicle chassis 1, and the other end of the lifting mechanism I25 is hinged with the material storage tank 26; the tank door 30 is hinged with the material storage tank 26; the tank door actuator 29 is used for opening or closing the tank door 30; the material storage tank 26 is provided with a connecting port 27 and an upper suction port 28; the tank door 30 is provided with a lower suction port 31 and a discharge port 32; the sealing ring 41 is embedded inside the upper suction opening 28. One end of the arm pipe 17 is communicated with the material storage system 5, and the other end of the arm pipe is communicated with the excavation head 16; the cyclone separator 18 is connected and communicated with the storage system 5 through a connecting pipe 23. The control arm 6 of the excavating head comprises a swing mechanism 33, a connecting frame 34, a lifting mechanism II 35, a first knuckle arm 36, a telescopic mechanism 37, a second knuckle arm 38, a spring 39, a balancing frame 40 and a gate valve 46; the connecting frame 34 is rotatably fixed on the upper suction opening 28 through a rotating mechanism 33, and the rotating mechanism 33 can adopt a rotating support; a conduit 3401 is welded and fixed at the lower end of the connecting frame 34; the conduit 3401 extends into the upper suction opening 28, and the outer ring is embedded in the inner side of the sealing ring 41; a connecting bent pipe 3402 is fixedly welded at the upper end of the connecting frame 34, the connecting bent pipe 3402 is communicated with the conduit 3401 (the connecting bent pipe 3402 and the conduit 3401 can be of an integrated structure), one end of the gate valve 46 is connected with the connecting bent pipe 3402, and the other end of the gate valve is connected with the pneumatic conveying system 4; the first section arm 36 is hinged with the connecting frame 34; one end of the lifting mechanism II 35 is hinged with the connecting frame 34, and the other end of the lifting mechanism II is hinged with the first knuckle arm 36; the second link arm 38 is slidably inserted into the first link arm 36; one end of the telescopic mechanism 37 is welded with the first knuckle arm 36 or is fixedly connected through a bolt, and the other end of the telescopic mechanism is welded with the second knuckle arm 38 or is fixedly connected through a bolt; the first knuckle arm 36 and the second knuckle arm 38 are respectively welded and fixed with a preset number of anti-falling frames 47, and the anti-falling frames 47 are rotatably fixed with a riding wheel A43 and a pressing wheel A42; the front end of the balancing stand 40 is hinged to a short plate welded and fixed to the lower end of the second knuckle arm 38, a spring 39 is hung at the rear end of the second knuckle arm 38, the middle of the balancing stand 40 is hung at the bottom end of the spring 39, and a supporting roller B45 and a pressing roller B44 are rotatably fixed at the rear end of the balancing stand 40. The pneumatic transmission system 4 comprises an arm pipe 17, a cyclone separator 18, a filter tank 19, a four-way reversing ball valve 20, a pneumatic generator 21, a silencer 22, a connecting pipe 23 and a discharge pipe 24, wherein the pneumatic generator 21 can be selected from a vacuum pump. The canister 19 includes a housing and a filter element mounted within the housing. The cyclone separator 18 is connected with a filter tank 19 through a connecting pipe 23, and the air suction port and the air exhaust port of the filter tank 19, the silencer 22 and the air force generating device 21 are respectively connected and communicated with a four-way reversing ball valve 20 through the connecting pipe 23; one end of the arm pipe 17 is connected with the gate valve 46, and the other end of the arm pipe is connected and communicated with the excavation head 16; the arm pipe 17 can pass through between the idler A43 and the pinch roller A42 and between the idler B45 and the pinch roller B44 in a drawing way; the cyclone separator 18 is connected and conducted to the connection port 27 through the connection pipe 23. The excavation head 16 comprises a connecting joint 48, a handle 49, a pressing plate 50, a water delivery rubber pipe 51, a material suction pipe 52, a material suction head 53, a water delivery steel pipe 54, a high-pressure water gun 11 and a high-pressure nozzle 12, wherein the handle 49 is fixedly welded on the connecting joint 48; the connecting joint 48 is connected with the pneumatic transmission system 4; a mounting seat is fixedly welded on the connecting joint 48, and the high-pressure water gun 11 is fixed on the mounting seat through a pressing plate 50 by using bolts; the suction head 53 comprises an inner suction pipe 5301, a connecting flange 5302, a connecting disc 5303 and an outer suction pipe 5304; the inner suction pipe 5301 is welded and fixed at the lower end of the suction pipe 52, and the connecting flange 5302 is welded on the inner suction pipe 5301; the upper end of the connecting disc 5303 is welded with a water delivery steel pipe 54, the lower end of the connecting disc 5303 is provided with an inclined plane, and a preset number of high-pressure nozzles 12 are arranged on the inclined plane; an annular water channel is arranged on the outer ring of the connecting disc 5303 and communicated with the water delivery steel pipe 54 and the high-pressure nozzle 12; the outer suction pipe 5304 is positioned on the outer side of the connecting disc 5303 and is welded with the connecting disc 5303 into a whole to seal the annular water channel; the connecting disc 5303 is fixed on the connecting flange 5302 through bolts; the water delivery rubber hose 51 is communicated with the high-pressure water gun 11 and the water delivery steel pipe 54; the other end of the high-pressure water gun 11 is connected with a high-pressure pipeline 14, and the arm pipe 17 is a hose.

Cyclone 18 can carry out the prefilter to silt and moisture in the gas circuit, and filter tank 19 can carry out the secondary filter to silt and moisture in the gas circuit. The engine room 2 is used for installing and fixing components such as a high-pressure water pump 8, a four-way reversing ball valve 20, a pneumatic generating device 21, a silencer 22 and the like. The water tank 7 is fixed on the vehicle chassis 1 and on two sides of the storage tank 26, and stores and provides clean water for the high-pressure water pump 8. The high-pressure water pump 8 is fixed in the cabin 2, the rubber hose reel 10 is fixed on the vehicle chassis 1 and positioned at the tail end of the vehicle chassis 1, and the high-pressure pipeline 14 can be extended during high-pressure water jet operation; the rubber tube can be retracted after the operation is finished, and the space is saved. The high-pressure water pump 8 runs under the driving of the transmission device, absorbs water from the water tank 7 through the water absorption pipeline 13, and delivers the water to the high-pressure water gun 11 through the high-pressure pipeline 14, the pressure-regulating unloading valve 9 and the rubber hose reel 10. When an operator pulls a trigger of the high-pressure water gun 11, high-speed jet flow is jetted to the compacted base layer through the nozzle 12, and the compacted base layer is cut, broken and compacted to form particles or blocky materials. The pressure regulating unloading valve 9 can limit the highest pressure of the high-pressure pipeline 14 and protect the high-pressure water pump 8; the highest speed of jet flow is limited, the cutting of the broken compacted base layer is guaranteed, and meanwhile damage to underground pipelines, cables and the like is avoided.

The four-way reversing ball valve 20, the air force generating device 21 and the silencer 22 are fixed in the cabin 2. The cyclone separator 18 and the filter tank 19 are fixed on the vehicle chassis 1 and positioned between the cabin 2 and the storage tank 26. The pneumatic conveying system 4 performs suction excavation operation through an opening at the tail end of the excavation head 16. Excavation head 16 can integrate high-pressure squirt 11, nozzle 12, collects high-pressure water jet crushing and suction excavation function in an organic whole, can realize single operation. One end of the lifting mechanism I25 is hinged with the vehicle chassis 1, the other end of the lifting mechanism I is hinged with the storage tank 26, and the tank body can be lifted or dropped. The tank door actuator 29 has one end hinged to the material storage tank 26 and one end hinged to the tank door 30, so that the tank door 30 can be opened or closed. When the material in the material storage tank 26 is stored fully and is not used, the vehicle can be turned to the unloading position, the material storage tank 26 is lifted through the lifting mechanism I25, the tank door 30 is opened through the tank door actuating mechanism 29, and the stored material is unloaded quickly. The lower suction port 31 is connected with a sewage suction pipe during sewage and sludge suction operation, so that the suction depth can be increased. The discharge opening 32 is connected to the discharge pipe 24 and allows the excavated area to be backfilled during the pressure relief of the pneumatic transport system 4.

The connecting frame 34 can be rotated relative to the storage tank 26 by the rotation mechanism 33. The lifting mechanism II 35 can drive the first knuckle arm 36 to lift. Telescoping mechanism 37 causes second arm 38 to telescope within first arm 36. Under the combined action of the slewing mechanism 33, the lifting mechanism II 35 and the telescopic mechanism 37, the control arm of the excavating head can drive the arm pipe 17 and the excavating head 16 to move and position at will in a certain space range, and the excavating is accurately carried out at a preset position by suction. An operator only needs to apply small force to the excavation head 16, the excavation head can be re-balanced and positioned under the action of the balance frame 40, and the excavation can be accurately sucked and excavated at a preset position in a small space without driving the lifting mechanism II 35 and the telescopic mechanism 37, so that the excavation head 16 is positioned more flexibly and efficiently.

The working mode of the vacuum excavation vehicle is as follows:

(1) and pumping and excavating the working mode.

The four-way reversing ball valve 20 is operated to assume the dig position. Closing the lower suction opening 31 and the discharge opening 32; the connection port 27 and the upper suction port 28 are communicated. At this time, the air inlet of the air-force generator 21 is communicated with the filter tank 19, and the air outlet of the air-force generator 21 is communicated with the silencer 22. The air-force generating device 21 serves as a vacuum generating device and the silencer 22 serves as an exhaust silencer. The pneumatic generator 21 is driven by the transmission device to operate (the pneumatic generator 21 can be driven by a power system of the carrier vehicle through the transmission device and can also be connected to an external power source), air is sucked from a conducting channel formed by the filter tank 19, the cyclone separator 18, the storage tank 26, the arm pipe 17 and the excavating head 16, and finally high-speed negative-pressure airflow is formed in the arm pipe 17, the excavating head 16 and nearby the excavating head 16. High-speed jet flow is jetted to the compaction base layer through the high-pressure water jet system 3, and the crushed compact material is cut to form particles or block-shaped materials (the high-pressure water jet system 3 can be driven by a power system of a carrying vehicle and can also be connected to an external power source). The operator manipulates the digging head 16 to approach the granular or block material, and when the flow rate of the high-speed airflow is greater than the suspension velocity of the granular or block material, the high-speed airflow drives the granular or block material to flow with the airflow and finally to be sucked into the storage tank 26. Because the cross-sectional area of the material storage tank 26 is large, the flow velocity of the air flow is low, and most of the particles or the block-shaped materials sink into the bottom of the material storage tank 26 under the action of gravity. The small particles and the water vapor flow into the cyclone separator 18 along with the airflow, most of the small particles and the water vapor are separated by the cyclone separator 18, then the airflow enters the filter tank 19 and is filtered by the filter tank 19 to form clean air, and the clean air enters the four-way reversing ball valve 20, the pneumatic generator 21 and the silencer 22 and is finally discharged into the atmosphere.

(2) And (4) a pressurizing and backfilling working mode.

The four-way reversing ball valve 20 is operated to assume a pressurized position. Closing the upper suction opening 28 and the lower suction opening 31; the connection port 27 and the discharge port 32 are communicated. At this time, the air inlet of the air force generator 21 is communicated with the silencer 22, and the air outlet of the air force generator 21 is communicated with the filter tank 19. The air-force generating device 21 serves as a pressure generating device and the silencer 22 serves as a suction silencer. The pneumatic generator 21 is driven by a transmission device to operate, air is sucked from the silencer 22, the air is exhausted and pressurized to the storage tank 26 through the four-way reversing ball valve 20, the filter tank 19 and the cyclone separator 18, under the action of internal pressure, a solid-liquid mixture stored in the storage tank 26 is extruded out from the discharge port 32, and the excavated position is backfilled through the discharge pipe 24.

The vacuum excavation vehicle can be accurately positioned, and is environment-friendly and free of dust when used for performing minimally invasive excavation on the ground (the excavation aperture can be as small as 200mm in diameter); in the excavation process, pipelines cannot be damaged; the pipeline can be excavated downwards by crossing the pipeline, so that the pipeline is convenient to maintain; cutting, crushing and compacting a base layer by using a high-pressure water jet system to form particles or blocky materials, and pumping air in a conveying system to form high-speed negative-pressure air flow for conveying by using a pneumatic conveying technology; the conveying negative pressure is low, so that the requirement on the vacuum performance of the pneumatic generation device is lowered; the limit of vacuum pressure is broken through, and the suction capacity is stronger; can utilize strength generating device to the pressurization of storage system through changing switching-over device position, extrude the solid-liquid mixture that storage system stored from the bin outlet, backfill the position of digging, avoid the wasting of resources, the operation is more high-efficient.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. The utility model provides a vacuum excavation car, characterized by, includes vehicle chassis (1), be provided with high-pressure water jet system (3), pneumatic conveyor system (4), storage system (5), excavation head control arm (6) and excavation head (16) on vehicle chassis (1), storage system (5) and pneumatic conveyor system (4) intercommunication.

2. The vacuum excavation vehicle of claim 1, wherein the high-pressure water jet system (3) comprises a water tank (7), a high-pressure water pump (8), a pressure-regulating unloading valve (9), a hose reel (10), a high-pressure water gun (11), a high-pressure nozzle (12), a water suction pipeline (13), a high-pressure pipeline (14) and an unloading pipeline (15), and the water tank (7) is fixed on the vehicle chassis (1) and is connected with the high-pressure water pump (8) through the water suction pipeline (13); the hose reel (10) is fixed on the vehicle chassis (1) and used for winding and unwinding the high-pressure pipeline (14); the pressure-regulating unloading valve (9) is arranged in the middle of the high-pressure pipeline (14), and an unloading port of the pressure-regulating unloading valve (9) is connected to the water tank (7) through an unloading pipeline (15); the high-pressure water gun (11) is connected with a high-pressure pipeline (14); the high-pressure nozzle (12) is connected with a high-pressure water gun (11).

3. The vacuum excavation vehicle as claimed in claim 1 or 2, wherein the storage system (5) comprises a lifting mechanism I (25), a storage tank (26), a connecting port (27), an upper suction port (28), a tank door actuating mechanism (29), a tank door (30), a lower suction port (31), a discharge port (32) and a sealing ring (41), and the bottom of the rear end of the storage tank (26) is hinged with the vehicle chassis (1); one end of the lifting mechanism I (25) is hinged with the vehicle chassis (1), and the other end of the lifting mechanism I is hinged with the material storage tank (26); the tank door (30) is hinged with the material storage tank (26); the tank door actuator (29) is used for opening or closing the tank door (30); the storage tank (26) is provided with a connecting port (27) and an upper suction port (28); the tank door (30) is provided with a lower suction opening (31) and a discharge opening (32); the sealing ring (41) is embedded in the inner side of the upper suction opening (28).

4. The vacuum excavation vehicle of claim 1 or 2, wherein the pneumatic conveying system (4) comprises an arm pipe (17), a cyclone separator (18), a filter tank (19), a four-way reversing ball valve (20), a pneumatic generating device (21), a silencer (22), a connecting pipe (23) and a discharging pipe (24), the cyclone separator (18) is connected with the filter tank (19) through the connecting pipe (23), and air suction ports and air exhaust ports of the filter tank (19), the silencer (22) and the pneumatic generating device (21) are respectively connected and communicated with the four-way reversing ball valve (20) through the connecting pipe (23); one end of the arm pipe (17) is communicated with the material storage system (5), and the other end of the arm pipe is connected with an excavation head (16); the cyclone separator (18) is connected and communicated with the material storage system (5) through a connecting pipe (23).

5. The vacuum excavation vehicle of claim 1, wherein the excavation head control arm (6) comprises a swing mechanism (33), a connecting frame (34), a lifting mechanism II (35), a first knuckle arm (36), a telescopic mechanism (37), a second knuckle arm (38), a spring (39), a balancing frame (40) and a gate valve (46); the connecting frame (34) is rotatably fixed on the upper suction opening (28) through a rotating mechanism (33); the lower end of the connecting frame (34) is provided with a conduit (3401); the conduit (3401) extends into the upper suction opening (28), and the outer ring is embedded in the inner side of the sealing ring (41); a connecting bent pipe (3402) is arranged at the upper end of the connecting frame (34), one end of the gate valve (46) is connected with the connecting bent pipe (3402), and the other end of the gate valve is connected with the pneumatic conveying system (4); the first section arm (36) is hinged with the connecting frame (34); one end of the lifting mechanism II (35) is hinged with the connecting frame (34), and the other end of the lifting mechanism II is hinged with the first knuckle arm (36); the second arm (38) is slidably inserted into the first arm (36); one end of the telescopic mechanism (37) is fixedly connected with the first section arm (36), and the other end of the telescopic mechanism is fixedly connected with the second section arm (38); the anti-falling device is characterized in that a preset number of anti-falling frames (47) are respectively fixed on the first section arm (36) and the second section arm (38), and a riding wheel A (43) and a pressing wheel A (42) are rotatably fixed on the anti-falling frames (47); the front end of the balance frame (40) is hinged to a short plate fixed to the lower end of the second section arm (38), a spring (39) is hung at the rear end of the second section arm (38), the middle of the balance frame (40) is hung at the bottom end of the spring (39), and a riding wheel B (45) and a pressing wheel B (44) are rotatably fixed to the rear end of the balance frame (40).

6. The vacuum excavation vehicle of claim 5, wherein the pneumatic conveying system (4) comprises an arm pipe (17), a cyclone separator (18), a filter tank (19), a four-way reversing ball valve (20), a pneumatic generating device (21), a silencer (22), a connecting pipe (23) and a discharging pipe (24), the cyclone separator (18) is connected with the filter tank (19) through the connecting pipe (23), and air suction ports and air exhaust ports of the filter tank (19), the silencer (22) and the pneumatic generating device (21) are respectively connected and communicated with the four-way reversing ball valve (20) through the connecting pipe (23); one end of the arm pipe (17) is connected with the gate valve (46), and the other end of the arm pipe is connected with the excavation head (16); the arm pipe (17) can be pulled to penetrate through the space between the supporting roller A (43) and the pressing roller A (42) and the space between the supporting roller B (45) and the pressing roller B (44); the cyclone separator (18) is communicated with the connecting port (27) through a connecting pipe (23).

7. The vacuum excavation vehicle of claim 2, wherein the excavation head (16) comprises a connecting joint (48), a handle (49), a pressing plate (50), a water delivery hose (51), a material suction pipe (52), a material suction head (53), a water delivery steel pipe (54), a high-pressure water gun (11) and a high-pressure nozzle (12), and the handle (49) is fixed on the connecting joint (48); the connecting joint (48) is connected with the pneumatic transmission system (4); the connecting joint (48) is provided with a mounting seat, and the high-pressure water gun (11) is fixed on the mounting seat through a pressing plate (50); the suction head (53) comprises an inner suction pipe (5301), a connecting flange (5302), a connecting disc (5303) and an outer suction pipe (5304); the inner suction pipe (5301) is fixed at the lower end of the suction pipe (52), and the connecting flange (5302) is welded on the inner suction pipe (5301); the upper end of the connecting disc (5303) is welded with a water conveying steel pipe (54), the lower end of the connecting disc is provided with an inclined plane, and the inclined plane is provided with a preset number of high-pressure nozzles (12); an annular water channel is arranged on the outer ring of the connecting disc (5303), and the annular water channel is communicated with the water delivery steel pipe (54) and the high-pressure nozzle (12); the outer material suction pipe (5304) is positioned on the outer side of the connecting disc (5303) and welded with the connecting disc (5303) into a whole to seal the annular water channel; the connecting disc (5303) is fixed on the connecting flange (5302) through bolts; the water delivery rubber pipe (51) is communicated with a high-pressure water gun (11) and a water delivery steel pipe (54); the other end of the high-pressure water gun (11) is connected with a high-pressure pipeline (14).