CN106694271B

CN106694271B - Trunk whitewashing machine with stable injection pressure

Info

Publication number: CN106694271B
Application number: CN201610986444.6A
Authority: CN
Inventors: 孙宏志; 张玉明; 陈勇
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2016-11-09
Filing date: 2016-11-09
Publication date: 2022-10-21
Anticipated expiration: 2036-11-09
Also published as: CN106694271A

Abstract

The invention discloses a trunk whitewashing machine with stable injection pressure, which comprises a motor vehicle, wherein the front part of the motor vehicle is provided with a working arm, the front end of the working arm is provided with a spray barrel assembly, the spray barrel assembly comprises a spray head, the motor vehicle is provided with a mixed liquid tank for storing paint, the mixed liquid tank is connected with the spray head through a paint conveying pipeline, a liquid valve is arranged at the joint of the paint conveying pipeline and the spray head, the paint conveying pipeline is provided with a pressure storage tank, the pressure storage tank is provided with a pressure sensor, the pressure sensor is electrically connected to a control circuit, and the control circuit is connected with and controls the opening and closing of the liquid valve. The invention has the advantages that the spraying pressure is higher and the spraying effect is more uniform when the trunk whitewashing machine is used for spraying.

Description

Trunk whitewashing machine with stable injection pressure

[ technical field ] A method for producing a semiconductor device

The invention relates to a trunk whitewashing machine with stable injection pressure, and belongs to the field of tree maintenance equipment.

[ background of the invention ]

For the prevention and control of tree diseases and insect pests and the safe overwintering of trees, garden management departments and city construction management departments at home and abroad are used for brushing lime water and white liquid paint on greening trees on two sides of roads and in gardens for Xia Shaomo insects which are used for brushing one tree in winter. In winter in most areas of China, the temperature difference between day and night is large, the temperature of the surface of the trunk rises when the trunk is irradiated by sunlight in the daytime, particularly, the trunk which is dark brown is easier to absorb heat, so that the temperature of the trunk rises faster, the temperature of the trunk is reduced rapidly when the trunk enters night, the bark on the trunk is easy to crack when the trunk is cooled and heated, particularly, the thicker trunk is dark in color, the toughness of the tissue is poor, the bark is easy to crack, and the cracked bark can often become a place where plant diseases and insect pests occur and a place where worm eggs overwinter. The lime has certain sterilization and insecticidal effects, and can kill eggs parasitized on the cracked parts of the barks and accelerate the healing of the cracked parts. In the daytime, part of sunlight can be reflected, the temperature difference is reduced, the germination and flowering period of trees are delayed while freezing is prevented, and early spring frost damage is prevented.

However, the lime water is coated on the trunks by manually using a brush and a stick for many years, and for northern areas in China, the great quantity of trunks are coated in dozens of days before winter, which is an unforeseen thing. The trees are brushed for several times in the south in one year, and the trees are brushed again when the lime water of the trunks is washed almost by rainwater. In recent years, there are several machines for mechanically brushing the trunk with lime water, such as the chinese invention patent: [ trunk whitewashing machine ] patent number: ZL2013200219457.6, [ pavement trunk whitewashing machine ] patent number: 201320087220.3 [ machines for spraying white liquids on tree trunks ] patent No. 2013 0709457.0 all suffer from the following problems in use:

1. when the coating is sprayed, the pipeline is filled with the coating firstly by using the working pressure of the pressure pump, a certain pressure is generated in the pipeline, and a certain pressure requirement is met at the spray head at the beginning of spraying to realize the spraying effect, but the pressure maintaining time is short, so that the problems of enough pressure in the early stage and insufficient pressure in the later stage are easily caused;

2. the stirring mechanism arranged in the liquid tank can only uniformly stir the liquid at the rotation diameter of the stirring wheel in the tank, and the area outside the rotation diameter can not be effectively stirred, so that the precipitation phenomenon of the liquid in the tank is not effectively solved;

3. the liquid used for conveying the spraying liquid pipeline and the cleaning pipeline can not be automatically exchanged in the aspect of liquid exchange, and if a user forgets to clean the spraying liquid conveying pipeline when the work is finished in the operation machine, the pipeline can be blocked by the sediment of the liquid, and the machine can be seriously scrapped.

These technical differences and drawbacks make the improvement of efficiency insignificant and the reliability of the machine in use weak, and therefore cannot be used in the market in general.

Although some trunk lime water spraying machines are designed in recent years, the operation is complicated because 2-3 people are needed for operation during working, the time for spraying a tree is long, the efficiency is not different from manual painting, and more importantly, the spraying machines are difficult to overcome the defect that high-concentration liquid blocks a liquid conveying pipeline and a spray head and cannot be put into practical application.

[ summary of the invention ]

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a trunk whitewashing machine with stable injection pressure, so that the trunk whitewashing machine has higher injection pressure and more uniform spraying effect during spraying operation.

The technical scheme adopted by the invention is as follows:

the utility model provides a white machine is spouted to trunk that injection pressure is stable, includes the motor vehicle, and the motor vehicle is connected with the work arm, and the front end of work arm is equipped with spouts the bucket subassembly, it includes the shower nozzle to spout the bucket subassembly, be equipped with the mixed liquid case that is used for depositing coating on the motor vehicle, the mixed liquid case with connect through coating pipeline between the shower nozzle, coating pipeline with the shower nozzle junction is equipped with the liquid valve, be equipped with pressure storage jar on the coating pipeline, be equipped with pressure sensor on the pressure storage jar, pressure sensor electricity is connected to control circuit, control circuit connects opening and closing of force pump and this force pump of control.

The invention has the following beneficial effects:

in the prior art, when a coating conveying pipeline carries out spraying operation, the coating is firstly filled in the coating conveying pipeline only by using the working pressure of a pressure pump, certain pressure is generated in the coating conveying pipeline, and a certain pressure requirement is met at a spray head at the moment when the spraying operation is just started to realize the spraying effect. In addition, the automatic switching is realized by using the control circuit, and the stable spraying operation can be ensured.

Preferably, a liquid valve is arranged at the joint of the coating conveying pipeline and the spray head, and the liquid valve is electrically connected with the control circuit.

Preferably, a pressure pump motor is connected to the pressure pump, and the control circuit is configured to: when the pressure sensor is larger than the upper limit preset value, the liquid valve is opened, and the control circuit controls the pressure pump motor to be closed; and when the pressure sensor is lower than the lower limit preset value, the liquid valve is closed, and the pressure pump motor is opened.

Preferably, the upper limit preset value ranges from 0.3 to 0.6MPa, and the lower limit preset value ranges from 0.01 to 0.1MPa.

Preferably, the pressure pump divides the coating conveying pipeline into a high-pressure conveying pipeline and a common conveying pipeline, the common conveying pipeline is directly connected with the mixed liquid tank, and the common conveying pipeline is provided with a mixed liquid control valve.

Preferably, the mixed liquid control valve is connected to the control circuit.

Preferably, the motor vehicle is further provided with a cleaning liquid tank, the cleaning liquid tank is connected with a cleaning liquid pipeline, the cleaning liquid pipeline is connected with the coating conveying pipeline, and a cleaning liquid control valve is arranged on the cleaning liquid pipeline.

Preferably, the cleaning liquid control valve is connected to the control circuit.

Preferably, the bottom of the mixed liquid box is provided with a stirring shaft.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic structural diagram of an initial working state of the trunk whitewashing machine of the present invention;

FIG. 2 is a schematic structural view of the lifting mechanism of the trunk whitewashing machine of the present invention when lifted;

FIG. 3 is a schematic structural diagram of a liquid storage tank in the trunk whitewashing machine of the present invention;

FIG. 4 is a schematic flow chart of the coating of the trunk whitewashing machine of the present invention during spraying and recycling;

FIG. 5 is a general schematic view of a first connecting mechanism of the trunk whitewashing machine of the present invention;

FIG. 6 is a schematic view of a turnover mechanism in the first connecting mechanism of the trunk whitewashing machine of the present invention;

FIG. 7 is a schematic view of a first rotating mechanism of the first connecting mechanism of the trunk whitewashing machine of the present invention;

FIG. 8 is a schematic view of a lifting mechanism of the trunk whitewashing machine of the present invention;

FIG. 9 is a schematic view of a transverse cross section of the lifting mechanism of the trunk whitewashing machine of the present invention;

FIG. 10 is a schematic view of the connection between the pulley and the extension Liang Jiaban in the lifting mechanism of the trunk whitewashing machine of the present invention;

FIG. 11 is a schematic view of a second connecting mechanism of the trunk whitewashing machine of the present invention;

FIG. 12 is a schematic structural view of a second connecting mechanism and a telescopic mechanism of the trunk whitewashing machine of the present invention;

FIG. 13 is a schematic structural view of a third connecting mechanism of the trunk whitewashing machine of the present invention;

FIG. 14 is a schematic view of an automatic return mechanism in a third connecting mechanism of the trunk whitewashing machine of the present invention;

FIG. 15 is a return flow chart of the trunk whitewashing machine of the present invention under the action of the automatic return mechanism;

FIG. 16 is a schematic view of a rotary white sprayer of the present invention;

FIG. 17 is another schematic rotation diagram of the trunk whitewashing machine of the present invention;

FIG. 18 is a schematic view of the trunk whitewashing machine of the present invention rotated 90 degrees by the first rotating mechanism;

FIG. 19 is a schematic structural view of a spray barrel assembly of the trunk whitewashing machine of the present invention;

FIG. 20 is a simplified top plan view of a spray barrel assembly of the trunk whitewashing machine of the present invention;

FIG. 21 is a schematic view of the recovery assembly of the barrel assembly of the trunk whitewashing machine of the present invention;

fig. 22 is a schematic view showing the connection of two return water control valves in the spray barrel assembly of the trunk whitewashing machine of the invention.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the present embodiment is a tree trunk whitewashing machine, which includes a motor vehicle, a working arm is disposed at the front of the motor vehicle, a spraying barrel assembly 1 is disposed at the front end of the working arm, the spraying barrel assembly 1 includes a left half barrel 11 and a right half barrel 12 which can be opened and closed, a nozzle 102 is disposed in the spraying barrel assembly 1, the left half barrel 11 and the right half barrel 12 surround a tree trunk in an open state, and then paint is sprayed from the nozzle 102, the paint is generally lime mixed material, and can be sprayed in several seconds, after spraying, the motor vehicle is started, and spraying operation can be continued on the next tree, and the spraying efficiency is very high.

The specific structure of this embodiment, the motor vehicle includes the frame main part, the frame main part includes frame forepart 21, driving position 22, frame afterbody 23, in this embodiment, driving position 22 is located between frame forepart 21 and frame afterbody 23, wherein install hydraulic tank 231 on the frame afterbody 23, generator 234, motor vehicle engine 235, be equipped with air compressor pump 37 on the frame forepart 21, liquid storage box, wherein liquid storage box comprises two parts, refer to fig. 3 specifically, one of them is mixed liquid case 31, another is washing liquid case 32, be used for storing coating in the mixed liquid case 31, be used for storing washing liquid in the washing liquid case 32, be connected with the coating pipeline between mixed liquid case 31 and the shower nozzle 102 of spray barrel subassembly 1, coating is carried shower nozzle 102 department through the coating pipeline and is carried out the spraying.

Referring to fig. 3 and 4, in order to prevent the coating from being solidified in the coating conveying pipeline to cause blockage after the spraying operation is finished, in this embodiment, a cleaning liquid tank 32 is separately arranged in the liquid storage tank, the cleaning liquid tank 32 is separately connected with a cleaning liquid pipeline 321, the cleaning liquid pipeline 321 is communicated with the coating conveying pipeline, and a cleaning liquid control valve 322 is arranged on the cleaning liquid pipeline 321, after the spraying operation is finished, the cleaning liquid control valve 322 is opened, the coating conveying pipeline is flushed with the cleaning liquid, and the coating is prevented from being solidified in the coating conveying pipeline.

In addition, in order to realize that the whole cleaning and spraying process is more automated, in this embodiment, the pressure pump 33 is disposed on the paint conveying pipeline, the pressure pump 33 is connected with the pressure pump motor 331, under the action of the pressure pump 33, the paint conveying pipeline between the pressure pump 33 and the spray barrel assembly 1 is referred to as a high-pressure conveying pipeline 311, the high-pressure conveying pipeline 311 is provided with the pressure storage tank 34 and the pressure sensor 341, the liquid valve 101 is disposed between the high-pressure conveying pipeline 311 and the spray barrel assembly 1, the liquid valve 101 specifically includes an upper valve 1011 and a lower valve 1012, which is described in detail below, the common conveying pipeline 312 is disposed between the pressure pump 33 and the mixed liquid tank 31, that is, in this embodiment, the common conveying pipeline 312 and the high-pressure conveying pipeline 311 jointly form the paint conveying pipeline, the common conveying pipeline 312 is provided with the mixed liquid control valve 313, the cleaning liquid pipeline 321 is connected with the common conveying pipeline 312, the whole cleaning and spraying process is controlled by using the control circuit, and the control circuit is electrically connected with the liquid valve 101, the pressure sensor 341, the pressure pump motor 331, and the cleaning liquid control valve 322.

When the pressure sensor 341 in the pressure storage tank 34 reaches the upper limit preset value, the upper limit preset value ranges from 0.3 to 0.6Mpa, the pressure pump motor 331 is powered off and stops working, the liquid valve 101 in the high-pressure delivery pipe 311 is opened, the cleaning liquid control valve 322 is closed, the coating enters the high-pressure delivery pipe 311 through the common delivery pipe 312, the pressure in the high-pressure delivery pipe 311 is increased, a part of the pressure is stored in the pressure storage tank 34, the pressure in the pressure storage tank 34 is increased, when the pressure sensor 341 in the pressure storage tank 34 reaches the upper limit preset value, the upper limit preset value ranges from 0.3 to 0.6Mpa, the pressure pump motor 331 is powered off and stops working, the liquid valve 101 is opened, the coating in the high-pressure delivery pipe 311 is sprayed out of the spray head 102 under the pressure relief effect of the pressure storage tank 34, and after the liquid valve 101 is closed, the coating is not sprayed out of the spray head 102, so that the operation process is repeated.

In the prior art, the pressure of the pressure pump 33 is only used for delivering the coating, which has the disadvantage that the liquid valve 101 reaches the pressure requirement at the spray head 102 at the moment of just opening, but the maintenance time is very short, and after the pressure storage tank 34 and the pressure sensor 341 are additionally arranged in the embodiment, the coating in the high-pressure delivery pipe 311 not only depends on the action of the pressure pump 33, but also depends more on the pressure of the pressure storage tank 34, so that the high-pressure state can be maintained in the high-pressure delivery pipe 311 for a long time after the liquid valve 101 is opened, and finally the coating is more uniform during spraying.

When the spraying operation is completed, the control circuit controls the mixed liquid control valve 313 to be closed, the cleaning liquid control valve 322 is opened at the moment, and the cleaning liquid enters the high-pressure conveying pipeline 311, so that the residual paint in the high-pressure conveying pipeline 311 is washed away completely, and the paint is prevented from being solidified in the high-pressure conveying pipeline 311.

In addition, in order to prevent the paint from settling in the mixed liquid tank 31 for a long time, in the present embodiment, a stirring system is provided in the mixed liquid tank 31, and in the present embodiment, the stirring system is provided at the bottom of the mixed liquid tank 31, and since the paint settles at the bottom of the mixed liquid tank 31, the stirring system is provided at the bottom of the mixed liquid tank 31 to maximize the effect of preventing settling.

Specifically, as shown in fig. 3, in this embodiment, two stirring shaft bearing seats 314 are installed on the inner side wall of the mixed liquid tank 31, the two stirring shaft bearing seats 314 are opposite to each other and are provided, a stirring shaft 315 is rotatably connected to the two stirring shaft bearing seats 314, one end of the stirring shaft 315 extends out of the mixed liquid tank 31 and is connected with a stirring power device through a coupling 318, the stirring power device is a stirring motor 316, after rotation, the stirring shaft 315 is driven to rotate, and precipitates in the mixed liquid tank 31 can be stirred, so as to solve the problem of precipitation in the mixed liquid tank 31. A mixed liquid tank cover 317 is provided on the top of the mixed liquid tank 31, and a cleaning liquid tank cover 323 is provided on the cleaning liquid tank 32.

The working arm in this embodiment generally comprises a working arm front section and a working arm rear section, and as an example, as shown in fig. 1 and fig. 2, the working arm front section mainly comprises a telescopic mechanism 5, the working arm rear section mainly comprises a lifting mechanism 7, a first connecting mechanism 8 is connected between the bottom of the lifting mechanism 7 and a frame front body 21, a second connecting mechanism 6 is connected between the lifting mechanism 7 and the telescopic mechanism 5, and a third connecting mechanism 4 is arranged between the telescopic mechanism 5 and a spray barrel assembly 1.

The mechanism described above is specifically developed below. In order to make the description more clear and uniform, the X axis, the Y axis, and the Z axis are introduced in this embodiment, and the directions of the X axis, the Y axis, and the Z axis can be referred to in fig. 1, which is shown in fig. 1 as the most initial state diagram, where the X axis direction in this embodiment is the front-rear driving direction of the vehicle.

First, the first connecting mechanism 8 mainly includes three parts: tilting mechanism, first mechanism, the first slewing mechanism of pulling, wherein tilting mechanism can let whole elevating system 7 use the X axle to rotate as the axis, and first mechanism of pulling then can let elevating system 7 use the Y axle to rotate as the axis, and first slewing mechanism then can let whole elevating system 7 use the Z axle to rotate as the axis.

Turnover mechanism: referring to fig. 5 and 6, the turning cylinder support 81 is fixedly connected to the frame front body 21, the turning cylinder 82 is disposed on the turning cylinder support 81, the extending direction of the turning cylinder 82 is the Y-axis direction, one end of the turning cylinder 82 is fixedly mounted on the turning cylinder support 81, the other end of the turning cylinder 82 is connected to the frame bent plate 83, the frame bent plate 83 is an L-shaped plate and includes a bent plate vertical plate 831 and a bent plate horizontal plate 832, the bent plate horizontal plate 832 is rotatably connected to the turning cylinder support 81 through the turning shaft 833, a turning shaft sleeve 834 is disposed between the turning shaft 833 and the turning cylinder support 81, when the extending end of the turning cylinder 82 acts on the bent plate vertical plate 831, the whole frame bent plate 83 is driven to rotate by using the turning shaft 833 as the axis, i.e., rotates along the X-axis direction, so that the vertical angle of the spray barrel assembly 1 can be adjusted, and the corresponding adjustment can be performed according to the verticality of the trunk. The overturning angle of the overturning mechanism is relatively small and only slightly rotates.

The first lifting mechanism: referring to fig. 5, the spraying barrel comprises a drum base 84, a base swing hinge 841 is arranged between the drum base 84 and the frame bent plate 83, a first lifting oil cylinder 85 is arranged between the drum base 84 and the frame bent plate 83, and when the first lifting oil cylinder 85 extends and retracts, the drum base 84 is driven to rotate towards the frame bent plate 83 or rotate away from the frame bent plate 83 around the axis of the base swing hinge 841, namely when the frame bent plate 83 is in a horizontal state, the drum base 84 rotates around the axis of the Y axis, so that the vertical angle of the spraying barrel assembly 1 can be finally adjusted, and the corresponding adjustment can be performed according to the verticality of a trunk. The vertical angle here is different from the vertical angle of the turnover mechanism, the vertical angle of the turnover mechanism is adjusted in the left-right direction, and the vertical angle of the first pulling mechanism is adjusted in the front-back direction.

A first rotation mechanism: with reference to fig. 5, 7 and 8, the drum type vibration reducer comprises a drum 86, the drum 86 is disposed above a drum base 84, a flange ring extends radially on the outer periphery of the drum 86, a gear ring 861 is fixed on the flange ring through bolts, namely the gear ring 861 is fixed on the outer ring of the drum 86, the gear ring 861 is engaged with a pinion gear 871, the pinion gear 871 is connected with a speed reducer 87, a vertical shaft 88 is disposed inside the drum 86, a drum support bearing is disposed between the vertical shaft 88 and the inner wall of the drum 86, the drum support bearing comprises an upper support bearing 862 and a lower support bearing 863, a bearing support sleeve 865 is disposed between the upper support bearing 862 and the lower support bearing 863, the upper support bearing 862 is used for bearing the pressure above the drum 86, and the lower support bearing 863 is supported between the drum 86 and the drum base 84. The bottom of the vertical shaft 88 in this embodiment extends into the drum base 84, and a thrust bearing 864 is further disposed between the bottom of the drum 86 and the drum base 84, the thrust bearing 864 being configured to bear all of the bearing forces above the drum 86 and the drum 86. Based on the first rotating mechanism, when the speed reducer 87 is started, the rotating drum 86 can be driven to rotate circumferentially around the vertical shaft 88, namely, the rotation is realized by taking the Z axis as the axis, and the driving mode is more labor-saving, the rotating precision is higher, and the rotating position is more accurate by utilizing the mode that the motor drives and the pinion 871 are matched with the gear ring 861.

Fixed connection is directly realized with elevating system 7 through flange 89 in the top of rotary drum 86, in first coupling mechanism 8 promptly, rotates around the X axle, rotates around the Y axle, rotates around the Z axle, can both directly influence elevating system 7 and produce corresponding rotation.

As shown in fig. 8, the specific structure of the lifting mechanism 7:

the lifting mechanism 7 comprises an outer lifting cylinder 71 and an inner lifting cylinder 72 which extends and retracts in the outer lifting cylinder 71, the bottom of the outer lifting cylinder 71 is fixedly connected with a connecting flange 89, a lifting oil cylinder 73 is fixedly arranged on the outer lifting cylinder 71, the bottom end of the lifting oil cylinder 73 is fixed on the outer lifting cylinder 71, and the top end of the lifting oil cylinder 73 is connected to the inner lifting cylinder 72, namely, the inner lifting cylinder 72 is driven to lift in the outer lifting cylinder 71 when the lifting oil cylinder 73 extends and retracts.

In addition, as shown in fig. 8 to 10, a sprocket support 74 is disposed at the top of the inner lifting cylinder 72, the sprocket support 74 is rotatably connected with a sprocket 741 through a pin, the sprocket 741 is wound with a chain 742, one end of the chain 742 is fixed at the side of the outer lifting cylinder 71, the other end of the chain 742 is connected with a chain end rod 75, the chain end rod 75 is connected with a telescopic 3245 zxft 3276, the telescopic Liang Jiaban and the chain end rod 75 are both disposed in the inner lifting cylinder 72, wherein a pulley is rotatably connected to the telescopic Liang Jiaban through a pulley pin 763, in order to make the sliding more stable, an upper pulley 761 and a lower pulley 762 are disposed on the telescopic 4325 zxft 4376, a pulley bearing 764 is disposed between each pulley of the upper pulley 761 and the lower pulley 762 and the pulley pin 763, a side portion of the telescopic 3536 zxft 76 extends out of the inner lifting cylinder 72 and the outer lifting cylinder 71 and is connected with a telescopic mechanism 355 at the front side, and side walls of the inner lifting cylinder 72 and the outer lifting cylinder 71 are both provided with a through hole 3926 for extending out of the telescopic 39xft 26.

When the lifting cylinder 73 is lifted upwards, firstly the inner lifting cylinder 72 is lifted, the lifting stroke is temporarily defined as H, the inner telescopic Liang Jiaban in the inner lifting cylinder 72 correspondingly lifts H while the inner lifting cylinder 72 is lifted, in addition, the inner lifting cylinder 72 also drives the chain wheel 741 to lift while lifting, the chain wheel 741 drives the telescopic Liang Jiaban and the inner lifting cylinder 72 to move relatively while lifting, namely the telescopic 3532 zxft 3576 also lifts H relative to the inner lifting cylinder 72 per se, and the telescopic 3525 zxft 3425 is lifted by 2H relative to the outer lifting cylinder 71 in fact in addition to the H which is lifted by the inner lifting cylinder 72 per se. Therefore, the lift cylinder 73 is raised H to achieve the effect of extending Liang Jiaban by raising 2H in view of the lifting effect. By the design, the length requirement on the inner lifting cylinder 72 can be reduced, the lifting height of the telescopic Liang Jiaban can be ensured, the problem that the inner lifting cylinder 72 cannot extend too high to cause poor stability and shake to a large extent can be solved, and the material cost of the inner lifting cylinder 72 can be reduced to a certain extent.

As shown in fig. 11 to 12, the front side of the telescopic mechanism Liang Jiaban is connected to the telescopic mechanism 5, wherein the telescopic mechanism 5 and the telescopic mechanism Liang Jiaban are connected by the second connecting mechanism 6, in this embodiment, the second connecting mechanism 6 also includes two parts, that is, a second pulling mechanism and a second rotating mechanism, the second pulling mechanism drives the telescopic mechanism 5 to rotate around the Y axis, and the second rotating mechanism drives the telescopic mechanism 5 to rotate around the Z axis, it should be noted that, for clarity of description, the rotation around the Y axis and the rotation around the Z axis in this paragraph are defined and referred to on the premise that the first rotating mechanism, the tilting mechanism and the first pulling mechanism in the first connecting mechanism 8 are not operated in the initial state in fig. 1.

A second rotating mechanism: the telescopic mechanism comprises a vertical positioning bolt 61 installed on a telescopic Liang Jiaban, a supporting sleeve column 62 is sleeved outside the positioning bolt 61, the bottom of the supporting sleeve column 62 is fixed with a telescopic Liang Jiaban, a hinge sleeve 63 is arranged at the top of the supporting sleeve column 62, the positioning bolt 61 extends out of the bottom of a telescopic Liang Jiaban, a rotating hinge clamp plate 64 is arranged at the bottom of a telescopic Liang Jiaban, the rotating hinge clamp plate 64 is sleeved at the bottom of the positioning bolt 61, the rotating hinge clamp plate 64 can rotate circumferentially around the axis of the positioning bolt 61, the lower portion of the rotating hinge clamp plate 64 is connected with the telescopic mechanism 5, namely, the telescopic mechanism 5 can rotate around the positioning bolt 61, the rotating cylinder 65 which drives the telescopic mechanism 5 to rotate around the positioning bolt 61 is a rotating cylinder 65, the rotating cylinder 65 is not shown in figure 8, reference can be made to figure 16, one end of the rotating cylinder 65 is fixed on the telescopic Liang Jiaban, and the other end of the rotating cylinder 65 is fixed on the telescopic mechanism 5, and when the rotating cylinder 65 is telescopic mechanism 5 telescopic mechanism rotates around the positioning bolt 61.

The second lifting mechanism: including establishing the flexible roof beam rotation hinge 66 between rotation hinge splint 64 and telescopic machanism 5, for the convenience of installing flexible roof beam rotation hinge 66, telescopic machanism 5 is last to have set up rotation hinge backing plate 661, utilizes flexible roof beam rotation hinge 66, and telescopic machanism 5 can realize rotating along the Y axle, and drive telescopic link 52 realize along the Y axle pivoted for the second carry the hydro-cylinder 67, the second carry the hydro-cylinder 67 upper end to be fixed on hinge cover 63, the lower extreme is fixed on telescopic machanism 5, when second carries the hydro-cylinder 67 flexible, realizes telescopic machanism 5's luffing motion. The effect is similar to that of the first lifting mechanism, only the first lifting mechanism realizes synchronous lifting of the lifting mechanism 7 and the telescopic mechanism 5, and the second lifting mechanism only carries out independent lifting of the telescopic mechanism 5.

The telescoping mechanism 5: the telescopic mechanism 5 realizes that the working arm can be subjected to length expansion and contraction along the X-axis direction.

As shown in fig. 11 and 12, the telescoping mechanism 5 specifically includes: the telescopic beam 51 is hollow, a telescopic rod 52 is arranged in the telescopic beam 51, the front end of the telescopic rod 52 is connected with a telescopic oil cylinder 53, the other end of the telescopic oil cylinder 53 is fixed on the side wall of the telescopic beam 51, and the telescopic oil cylinder 53 drives the telescopic rod 52 to move back and forth along the X-axis direction when being telescopic.

As shown in fig. 12 to 14, the front end of the telescopic mechanism 5 is connected to the spray barrel assembly 1, the telescopic mechanism 5 and the spray barrel assembly 1 are provided with a third connecting mechanism 4, and the third connecting mechanism 4 mainly comprises three parts, including a third rotating mechanism, a third lifting mechanism and a spray barrel opening and closing driving mechanism. The third rotating mechanism is used for rotating the spray barrel assembly 1 around the Z axis, the third pulling mechanism is used for rotating the spray barrel assembly 1 around the Y axis, and the spray barrel opening and closing driving mechanism is used for driving the left half barrel 11 and the right half barrel 12 in the spray barrel assembly 1 to close or separate, and it should be noted that the rotation around the Y axis and the rotation around the Z axis in this section are described on the premise that the first connecting mechanism 8 and the second connecting mechanism 6 are not operated in the initial state in fig. 1 for clarity of description.

A third rotating mechanism: the front end of the telescopic rod 52 is hinged with a spraying barrel rotating support 42 through a rotating bolt 41, the axial direction of the rotating bolt 41 is the Z-axis direction, the spraying barrel rotating support 42 is connected with the spraying barrel assembly 1, so when the spraying barrel rotating support 42 rotates around the rotating bolt 41, the spraying barrel assembly 1 rotates around the rotating bolt 41. In an actual working environment, the spray barrel assembly 1 cannot be very accurately aligned with the trunk, so that the third rotating mechanism is used for automatically fine-adjusting the terminal of the telescopic rod 52, namely, the trunk only needs to be partially positioned in the fan-shaped angle range of the opened left half barrel 11 and the opened right half barrel 12, and when the left half barrel 11 and the right half barrel 12 are closed, the trunk can freely rotate by taking the rotating bolt 41 as a center, so that the manual fine-adjusting process is omitted.

The third lifting mechanism: different from the first lifting mechanism and the second lifting mechanism, the third lifting mechanism adopts a manual adjustment mode and is a fine adjustment mode, the adjustment is realized through an adjusting screw 43 connected between the spraying barrel rotating support 42 and the spraying barrel assembly 1, the axial direction of the adjusting screw 43 is consistent with the X-axis direction, in the embodiment, the top of the spraying barrel rotating support 42 extends upwards to form a support upper plate 421, the top of the spraying barrel assembly 1 is provided with a spraying barrel connecting plate 44, the adjusting screw 43 is connected with the support upper plate 421 and the spraying barrel connecting plate 44, a spraying barrel rotating hinge 45 is further arranged between the spraying barrel rotating support 42 and the spraying barrel connecting plate 44, the axial direction of the spraying barrel rotating hinge is the Y-axis direction, and when the adjusting screw 43 is manually screwed, the spraying barrel connecting plate 44 can rotate around the axis of the spraying barrel rotating hinge 45.

Spout the bucket actuating mechanism that opens and shuts: the bottom of spray can rotating support 42 extends downwards in this implementation has support hypoplastron 422, install the actuating cylinder 46 that opens and shuts on the support hypoplastron 422, the rear end that opens and shuts actuating cylinder 46 is fixed on support hypoplastron 422, the front end that opens and shuts actuating cylinder 46 is fixed with pull rod locating pin 471, rotate on the pull rod locating pin 471 and be connected with two pull rods 47, the front end of one of them pull rod 47 is articulated through pull rod hinge 472 and the half left bucket 11 in the spray can subassembly 1, the front end of another pull rod 47 is articulated through pull rod hinge 472 and the half right bucket 12 in the spray can subassembly 1. In the present embodiment, when the opening and closing actuating cylinder 46 extends to the front side, the two pull rods 47 respectively push the left half barrel 11 and the right half barrel 12 to open, and when the opening and closing actuating cylinder 46 retracts to the rear side, the two pull rods 47 pull the left half barrel 11 and the right half barrel 12 to close.

In addition, since the third rotating mechanism is free to rotate, after the spraying operation is completed, the angle of the spraying barrel assembly 1 is not returned to the initial position many times, in order to solve this problem, in this embodiment, the third connecting mechanism 4 further includes an automatic returning mechanism, the automatic returning mechanism includes two spring brackets 48 fixed on the telescopic rod 52, in this embodiment, one of the spring brackets 48 extends toward the left side of the telescopic rod 52, and the other extends toward the right side of the telescopic rod 52, a return spring 49 is connected between an end of each spring bracket 48 and the bracket lower plate 422, and after the automatic returning mechanism is provided, in the spraying alignment stage, the left half barrel 11 contacts the trunk, and by the interaction of the two return springs 49, one of the return springs 49 is compressed, and the other return spring 49 is extended, so as to rotate normally, and after the spraying operation is completed, the compressed return spring 49 generates an acting force to the rear end of the opening and closing execution cylinder 46 under the action of the elastic force, so as to return the opening and closing execution cylinder 46 to the initial position, that the axial direction of the telescopic rod 52 remains parallel, and the whole flow chart can be seen in fig. 15.

By means of the first connecting mechanism 8 and the second connecting mechanism 6, the telescopic mechanism 5 and the spray barrel assembly 1 can be rotated to the frame tail portion 23, and meanwhile, in order to better store and fix the spray barrel assembly 1, in this embodiment, a storage device for storing the spray barrel assembly 1 is arranged on the frame tail portion 23, the storage device can be a single placing plane, or a fixing column 322 extending upwards from the frame tail portion 23, in this embodiment, the fixing column 322 is a fixing column 322, and the fixing column 322 is fixed with the spray barrel assembly 1. After fixed accomodating, the user can drive the motor vehicle and transport, and it is more convenient to transport after accomodating like this obviously. In addition, a first rotating mechanism and a second rotating mechanism are specially added in the embodiment, so that folding rotation is achieved, the main body part of the telescopic mechanism 5 can be rotated to the side of the vehicle frame main body, when the spray barrel assembly 1 is stored at the tail part 23 of the vehicle frame, the visual field of a driver is not shielded by the telescopic mechanism 5, the safety is good, and the folding rotating storage mode enables the rotation degree to be more free.

Fig. 16 and 17 show two rotation modes, in fig. 16, the lifting mechanism 7 is used to lift the telescopic mechanism 5, then the first rotating mechanism is used to rotate the telescopic mechanism 5 and the second connecting mechanism by 180 degrees integrally, and the telescopic mechanism 5 and the second connecting mechanism are rotated to the frame tail 23 from the driving position to be fixed with the fixing column 322. And what show in fig. 17 is the mode of folding gyration, in this kind of gyration mode, utilize first slewing mechanism to make telescopic machanism, second coupling mechanism wholly pass 90 degrees, as the state shown in fig. 18, then utilize second slewing mechanism to continue to rotate telescopic machanism 5 90 degrees, simultaneously, utilize the third slewing mechanism can let spray barrel subassembly 1 continue to rotate 90 degrees, this kind of gyration mode, elevating system 7 can need not start, telescopic machanism 5 can revolve the lateral part at the frame main part, the height is lower during the transportation like this, and the field of vision is also better.

Spout bucket subassembly 1: as shown in fig. 19 to 22, the spray barrel assembly 1 in the present embodiment mainly includes: the spraying device comprises a spraying barrel body, a spraying component and a recycling component, wherein the spraying barrel body mainly comprises a left half barrel 11, a right half barrel 12 and a middle skeleton pipe 13 arranged between the left half barrel 11 and the right half barrel 12, the spraying component is used for introducing a coating from a high-pressure conveying pipeline 311 and spraying the coating from a spray head 102, and the recycling component is used for recycling the sprayed coating and then reflowing the coating to a mixed liquid tank 31.

A spraying component: referring to fig. 19, the three-way connection pipe 1013 is included, the three-way connection pipe 1013 is communicated with the high-pressure delivery pipe 311, the high-pressure delivery pipe 311 is divided into two paths through the three-way connection pipe 1013, the two paths are respectively an upper layer delivery pipe 1031 and a lower layer delivery pipe 1032, the spray head 102 is also divided into an upper layer spray head 1021 and a lower layer spray head 1022, the upper layer spray head 1021 is an upper layer delivery pipe 1031, the lower layer spray head 1022 is a lower layer delivery pipe 1032, an upper layer valve 1011 is arranged in the upper layer delivery pipe 1031, and a lower layer valve 1012 is arranged in the lower layer delivery pipe 1032.

The two valves are arranged to prevent the paint on the upper layer from flowing into the lower layer delivery pipe 1032 under the influence of self weight after the spraying is finished, so that when the next spraying is started, a larger amount of paint is stored in the lower layer delivery pipe 1032, and the interior of the upper layer delivery pipe 1031 is empty. Such hidden danger lies in that when the next spraying is started, the paint needs to be filled in the upper layer delivery pipe 1031 for a long period of time to reach the upper layer spray head 1021, and the paint of the lower layer delivery pipe 1032 is sprayed out as soon as being started, so obviously, the problem of uneven upper and lower spraying can be caused by the spraying operation, so that the upper layer delivery pipe 1031 and the lower layer delivery pipe 1032 are respectively and independently controlled, so that after the spraying is finished, the paint in the upper layer delivery pipe 1031 cannot flow downwards, the control of the amount is more even, and the effect of even spraying in the axial direction of the trunk is finally realized.

In order to make the trunk spray evenly in the circumferential direction, in this embodiment, an upper spray pipe 1041 and a lower spray pipe 1042 which are arranged along the circumferential direction of the inner wall of the barrel are arranged in the left half barrel 11 and the right half barrel 12, the upper spray pipe 1041 is communicated with the upper layer delivery pipe 1031, the lower spray pipe 1042 is communicated with the lower layer delivery pipe 1032, wherein more than two spiral nozzles are circumferentially distributed on the upper spray pipe 1041 at intervals, and more than two spiral nozzles are also circumferentially distributed on the lower spray pipe 1042 at intervals. In addition, the upper spraying pipe 1041 and the lower spraying pipe 1042 can also play a skeleton role, the overall strength of the left half barrel 11 and the right half barrel 12 is enhanced, and in order to further enhance the strength, the middle pipe 1023 is further arranged in the vertical middle of the left half barrel 11 and the right half barrel 12 in a reinforcing mode.

In the design of the upper and lower positions, the height of the upper spray pipe 1041 is higher than that of the upper layer delivery pipe 1031, and the height of the lower spray pipe 1042 is also higher than that of the lower layer delivery pipe 1032, so that the advantage of the design is that after the spraying operation is finished, the paint can flow back to the upper layer delivery pipe 1031 and the lower layer delivery pipe 1032 corresponding to each other due to self weight, instead of staying in the upper spray pipe 1041 and the lower spray pipe 1042 in a large amount, and the outflow of the paint from the upper layer spray head 1021 and the lower layer spray head 1022 is reduced.

Although the above-mentioned height drop design can avoid a large amount of coating residual liquid from upper shower nozzle 1021 and lower floor's shower nozzle 1022 to flow out, still have a small amount of residual liquid from upper shower nozzle 1021 and lower floor's shower nozzle 1022 to flow out, this part of residual liquid can be from upper shower nozzle 1021 and lower floor's shower nozzle 1022 after flowing out, can be along the barrel wall of left half-tub 11 and right half-tub 12 down-flow, this can cause the barrel wall to flow upward there is the coating residual liquid, long-term use, these coating residual liquids can solidify on the barrel wall surface, be difficult to wash, in order to solve this problem, in this embodiment upper shower nozzle 1021 and lower floor's shower nozzle 1022 correspond below setting up respectively and connect hopper 105, the coating residual liquid that flows out from upper shower nozzle 1021 and lower floor's shower nozzle 1022 can fall into to connect hopper 105 like this, the staff can regularly clear up to connect hopper 105, and is very convenient. For simplicity of illustration, only a portion of the receiving hopper 105 is shown in fig. 17.

In addition, in order to prevent the paint from being sprayed out of the top of the spray barrel assembly 1 during the spraying operation, the top of the spray barrel assembly is provided with a top cover 18, specifically, the top of the left half barrel 11 and the top of the right half barrel 12 are respectively provided with an annular support tube 106, taking the left half barrel as an example, the top cover is also semicircular, wherein the arc-shaped edge is fixed in the annular support tube 106 through a fixing steel wire 182, and the straight edge adopts an elastic tensile steel wire 181, so that the deformability of the tensile steel wire 181 can be utilized to well surround the trunk surface when the two top covers 18 are closed.

In order to ensure that the coating layer on the trunk is relatively regular and integral after the spraying operation is completed, an upper shielding plate 1071 is arranged above the upper layer sprayer 1021 in the embodiment, and a lower shielding plate 1072 is arranged below the lower layer sprayer 1022, so that when the coating is sprayed out of the sprayer onto the trunk, the upper edge and the lower edge of the coating layer on the trunk are tidy.

And (3) recovering the components: referring to fig. 21, the recycling assembly is disposed at the bottom of the spraying barrel assembly 1, and mainly includes two parts, one part is a recycling groove 14, the other part is a recycling cloth 15, the recycling groove 14 is disposed along the circumferential direction of the left half barrel 11 and the right half barrel 12, that is, disposed near the barrel walls, so that the coating can flow down along the barrel walls to the recycling groove 14, and the recycling cloth 15 is laid on the entire bottom surface of the spraying barrel assembly 1, the recycling cloth 15 in this embodiment is also correspondingly provided with two pieces, that is, a left recycling cloth and a right recycling cloth, the recycling cloth 15 is flexible and has elasticity, the structure of the recycling cloth 15 is similar to that of the top cover 18, wherein the semicircular edges are fixed on the recycling groove 14, the linear edges are supported by tensile steel wires, when the spraying barrel assembly 1 is opened, the trunk is squeezed into from the opening, when the spraying barrel assembly 1 is closed, the left recycling cloth and the right recycling cloth tend to be closed, the elastic force of the two linear edges by the tensile steel wires can be well attached to the surface of the trunk and surround the trunk, so that the gap between the trunk and the coating cloth 15 is not easy to flow out from the recycling cloth 15.

It should be noted that, in other embodiments, the recovery cloth may not be a split type, but may be a whole piece of elastic cloth, one side edge is connected to the left half barrel, and the other side edge is connected to the right half barrel.

In the embodiment, the recovery tank 14 is connected with the recovery pipeline 35, the recovery pipeline 35 is connected with the recovery pump 36, the recovery pump 36 is installed on the frame front body 21, the other end of the recovery pipeline 35 is connected with the mixed liquid tank 31, and the residual paint in the recovery tank 14 can be recovered into the mixed liquid tank 31 under the action of the recovery pump 36, so that the paint waste is reduced. In order to better guide the paint to the recycling tank 14, in this embodiment, a tightening steel wire 161 is fixed on the tank wall of the left half tank 11 and the right half tank 12, the other end of the tightening steel wire 161 is connected to the recycling cloth 15, a lifting cylinder 16 is disposed in the middle of the tightening steel wire 161, when the spraying operation is performed, the lifting cylinder 16 is in an extended state, the recycling cloth 15 is in an approximately horizontal state, after the spraying operation is completed, the lifting cylinder 16 is tightened, and the recycling cloth 15 is lifted and inclined, so that the paint on the recycling cloth 15 automatically flows to the recycling tank 14 due to its own gravity and does not stagnate on the recycling cloth 15. It should be noted that the pull cylinder 16 may be replaced with other telescopic actuators.

Because the spray bucket body of this embodiment includes left half bucket 11 and right half bucket 12, there are two corresponding recovery tanks 14, one is located the bottom of left half bucket 11, another is located the bottom of right half bucket 12, two recovery tanks 14 are not communicated, in this embodiment, each recovery tank 14 is provided with a recovery suction pipe 17, the end of each recovery suction pipe 17 is provided with a filter 171, in addition, each recovery suction pipe 17 is also provided with a return water control valve 172, two return water control valves 172 are merged into a whole through a three-way joint 173 and connected to the recovery pipeline 35 together, in this embodiment, two return water control valves 172 are connected with a controller through an air pipe 174, and with this controller, two return water control valves 172 are controlled such that when one of them is opened, the other is closed, and two return water control valves 172 are alternately opened.

The alternate use of two return water control valves 172 is designed for the purpose of: because the spray barrel assembly 1 in this embodiment is composed of the left half barrel 11 and the right half barrel 12, the recovery grooves 14 at the bottom of the left half barrel 11 and the right half barrel 12 are not communicated, actually, in the spraying process, the spray barrel assembly 1 cannot be kept in a horizontal state forever, when the spray barrel assembly 1 is inclined, the recovery suction pipe 17 in the recovery groove 14 at the bottom of the left half barrel 11 can be caused to contact with the liquid surface, and the recovery suction pipe 17 in the recovery groove 14 at the bottom of the right half barrel 12 cannot contact with the liquid surface, which results in that one side end of the three-way joint 173 can suck the liquid, and the other side is exposed in the air, so that the recovery pump 36 is in an idle state, the recovery pump 36 is burnt out after long-term use, and after the arrangement of the three-way joint, one end can be ensured to be in a closed state without causing an empty suction phenomenon, so that the residual paint in the recovery groove 14 can be absorbed and the recovery pump 36 is protected from being damaged.

While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. A trunk whitewashing machine with stable injection pressure comprises a motor vehicle, wherein the motor vehicle is connected with a working arm, the front end of the working arm is provided with a spray barrel assembly, the spray barrel assembly comprises a spray head, the motor vehicle is provided with a mixed liquid tank for storing paint, the mixed liquid tank is connected with the spray head through a paint conveying pipeline, and the paint conveying pipeline is provided with a pressure pump;

the working arm comprises a working arm front section and a working arm rear section, the working arm front section comprises a telescopic mechanism, the working arm rear section comprises a lifting mechanism, a first connecting mechanism is connected between the bottom of the lifting mechanism and the frame front body, a second connecting mechanism is connected between the lifting mechanism and the telescopic mechanism, and a third connecting mechanism is arranged between the telescopic mechanism and the spray barrel assembly;

the lifting mechanism comprises an outer lifting cylinder and an inner lifting cylinder which is telescopic in the outer lifting cylinder, the bottom of the outer lifting cylinder is fixedly connected with the connecting flange, a lifting oil cylinder is fixedly arranged on the outer lifting cylinder, the bottom end of the lifting oil cylinder is fixedly arranged on the outer lifting cylinder, and the top end of the lifting oil cylinder is connected to the inner lifting cylinder; the top of interior lift section of thick bamboo is equipped with the sprocket support, the sprocket support is connected with the sprocket through the round pin axle rotation, it has the chain to wind on the sprocket, chain one end is fixed at the lateral part of outer lift section of thick bamboo, the other end of chain is connected with the chain end pole, the chain end pole is connected with flexible Liang Jiaban, flexible Liang Jiaban and chain end pole are all built-in including the lift section of thick bamboo, wherein rotate through the pulley round pin axle on flexible Liang Jiaban and be connected with the pulley, set up top sheave and lower pulley on flexible Liang Jiaban, be equipped with pulley bearing between every pulley of top sheave and lower pulley and the pulley round pin axle, interior lift section of thick bamboo and outer lift section of thick bamboo are then stretched out to flexible Liang Jiaban's lateral part, realize being connected with the telescopic machanism of front side, all be equipped with the perforation that supplies the telescopic beam frame board to stretch out on the lateral wall of interior lift section of thick bamboo and the outer lift section of thick bamboo lateral wall.

2. The trunk whitewashing machine with stable spraying pressure as claimed in claim 1, wherein a liquid valve is arranged at the connection of the paint delivery pipeline and the spraying head, and the liquid valve is electrically connected with the control circuit.

3. The trunk whitewashing machine with stable injection pressure as claimed in claim 1, wherein a pressure pump motor is connected to the pressure pump, the control circuit is configured to: when the pressure sensor is larger than the upper limit preset value, the liquid valve is opened, and the control circuit controls the pressure pump motor to be closed; and when the pressure sensor is lower than the lower limit preset value, the liquid valve is closed, and the pressure pump motor is opened.

4. The trunk whitewashing machine with stable injection pressure as claimed in claim 3, wherein the upper preset value is in the range of 0.3-0.6 Mpa, and the lower preset value is in the range of 0.01-0.1 Mpa.

5. The trunk whitewashing machine with stable spraying pressure as claimed in claim 1, wherein the pressure pump divides the paint delivery pipe into a high pressure delivery pipe and a common delivery pipe, the common delivery pipe is directly connected with the mixed liquid tank, and the common delivery pipe is provided with a mixed liquid control valve.

6. The trunk whitewashing machine with stable injection pressure as claimed in claim 5, wherein said mixed liquid control valve is connected to said control circuit.

7. A trunk whitewashing machine with stable spraying pressure as claimed in one of claims 1 to 6, characterized in that a washing liquid tank is further provided on the motor vehicle, a washing liquid pipeline is connected with the washing liquid tank, the washing liquid pipeline is connected with the paint conveying pipeline, and a washing liquid control valve is provided on the washing liquid pipeline.

8. The trunk whitewashing machine with stable injection pressure as claimed in claim 7, wherein said cleaning fluid control valve is connected to said control circuit.

9. A trunk whitewashing machine with stable injection pressure as claimed in one of claims 1 to 6, wherein the bottom of the mixed liquid tank is provided with a stirring shaft.