CN217601172U - Can clear away town road traffic marking spraying device of debris - Google Patents

Abstract

The utility model provides a municipal road traffic marking spraying device capable of removing sundries, which solves the problem that, before spraying the traffic markings, manual cleaning of sundries on the road is often used, which is not only time-consuming and labor-intensive, but also causes dust to be raised. The problem of poor adhesion of the spray liquid due to re-falling on the ground. The utility model comprises a bottom plate, a paint storage box and a spraying mechanism are arranged on the bottom plate, the liquid inlet of the spraying mechanism is connected with the bottom of the paint storage box, the spraying port of the spraying mechanism extends to the outside of the bottom plate and faces downward; the front side of the bottom plate is fixed A garbage cleaning mechanism is provided. The garbage cleaning mechanism includes a cleaning device and a first garbage storage mechanism. The cleaning device is used to sweep the garbage on the ground into the first garbage storage mechanism; The dust suction port of the mechanism is communicated with the top of the cleaning device, and the dust suction filter mechanism is used to suck out the dust raised in the cleaning device, filter and store the dust.

Description

Municipal road traffic marking spraying device that can remove debris

technical field

The utility model relates to the field of road marking spraying equipment, in particular to a municipal road traffic marking spraying device which can remove sundries.

Background technique

With the increasing degree of automation, the application of spraying equipment is becoming more and more extensive, and special traffic marking spraying devices are also required in the construction of traffic markings on municipal roads.

In order to improve the adhesion effect of the spraying liquid, it is necessary to remove the sundries on the municipal road before using the traffic marking spraying device to spray the traffic markings. The existing debris removal method is basically manual use of cleaning tools, which is time-consuming and labor-intensive, and will raise dust on the ground, which will not only cause air pollution, but also dust that falls on the ground again will lead to the adhesion effect of the spray liquid poor.

Utility model content

In order to solve the problem in the background art that before spraying the traffic markings, manual cleaning of the sundries on the road is often used, which is not only time-consuming and labor-intensive, but also the raised dust will fall on the ground again, resulting in a poor adhesion effect of the spraying liquid. Poor problem, the utility model proposes a spraying device for municipal road traffic markings that can remove sundries.

The technical scheme of the utility model is: a municipal road traffic marking spraying device capable of removing sundries, comprising a base plate, a walking wheel is arranged at the bottom of the base plate, a handrail is arranged at the rear of the base plate, and a paint storage box and a spraying mechanism are arranged on the base plate , the liquid inlet of the spraying mechanism is connected to the bottom of the paint storage tank, and the spraying port of the spraying mechanism extends to the outside of the bottom plate and faces downward;

A garbage cleaning mechanism is fixed on the front side of the bottom plate. The garbage cleaning mechanism is located in front of the spraying port of the spraying mechanism. The garbage cleaning mechanism includes a cleaning device and a first garbage storage mechanism. The cleaning device is used to sweep the garbage on the ground into the first garbage. in storage facilities;

A dust suction filter mechanism is fixed on the bottom plate, the dust suction port of the dust suction filter mechanism is connected with the top of the cleaning device, and the dust suction filter mechanism is used to suck out the dust raised in the cleaning device, filter and store the dust;

A controller is arranged on the bottom plate, and the controller is respectively connected with the cleaning device, the dust suction filter mechanism and the spraying mechanism.

Preferably, the cleaning device includes a cleaning bin with a lower opening, a fixing frame is fixed at the rear of the cleaning bin, and the rear of the fixing frame is fixedly connected with the front side surface of the bottom plate;

The first garbage storage mechanism is fixed at the rear of the cleaning bin, and the front of the first garbage storage mechanism and the rear of the cleaning bin are connected to form a temporary garbage storage entrance;

The bottom of the cleaning bin is fixed with a guide plate. The guide plate is inclined from front to back and from bottom to top. The lower end of the guide plate extends to the bottom of the cleaning bin and the bottom plate, and the upper end of the guide plate extends to the garbage temporary storage entrance. bottom of;

The cleaning bin is provided with a cleaning drive mechanism, which is used to sweep the garbage on the ground into the garbage temporary storage entrance through the guide plate.

Preferably, the cleaning drive mechanism includes a rotary drive mechanism and a brush mechanism, the brush mechanism extends along the left-right direction and is rotatably arranged on the inner wall of the cleaning bin, and the left end of the brush mechanism is connected to the output shaft of the rotary drive mechanism;

The lowermost end of the brush mechanism is located in front of the lower end of the guide plate, and the lowermost end of the brush mechanism is flush with the bottom of the traveling wheel;

When the brush mechanism rotates to the area of the guide plate, the lower part of the brush mechanism is always in contact with the guide plate, so that the sundries on the ground can be pushed into the temporary garbage storage entrance by the brush mechanism along the guide plate .

Preferably, the front part of the brush mechanism can be in contact with the inner wall of the front side of the cleaning bin.

Preferably, the first garbage storage mechanism includes a storage bin and a first sealing door;

The bottom of the storage bin is provided with a first garbage outlet. The first sealing door comprises a left-right sliding and is arranged at the first garbage outlet, and the first sealing door is used to block the first garbage outlet.

Preferably, a lever mechanism is provided on the right side of the storage bin, and the lever mechanism is used to restrict the forward and backward movement of the first sealing door when the first sealing door closes the first garbage outlet.

Preferably, the dust-absorbing and filtering mechanism includes a dust-filtering mechanism provided on the bottom plate and a dust-absorbing mechanism provided on the dust-filtering mechanism. The dust chamber is connected;

The dust suction mechanism is used to extract the dust-carrying air from the cleaning device, and the dust filter mechanism is used to filter and store the dust in the air.

Preferably, the dust suction mechanism includes a dust suction head arranged in the cleaning bin;

The dust suction head has a conical cover structure, the inner diameter of the bottom of the dust suction head is larger than the inner diameter of the dust suction pipe, and the dust suction head is located above the brush head.

Preferably, the paint storage tank is embedded with a liquid level sensor for monitoring its internal liquid level, and the controller is connected to the liquid level sensor for control;

There is an indicator light on the paint storage tank, the controller is connected with the indicator light control, the indicator light and the liquid level sensor are used to indicate the minimum used liquid level value in the paint storage tank, and the minimum used liquid level value is the spraying mechanism can work normally Minimum liquid level.

The advantages of the utility model: the device can first clean the sundries on the road before spraying the traffic markings. ) is directly swept into the first garbage storage mechanism by the cleaning device for storage. At the same time, the raised dust gathers in the cleaning device, and is then removed from the cleaning device by the dust-absorbing filter mechanism. The dust-absorbing filter mechanism filters and stores the dust. , Exhaust clean air, which avoids air dust pollution, improves the working environment, and avoids too much dust mixed in the first garbage storage mechanism, causing the dust in the first garbage storage mechanism to slide out and fall on the ground again. As a result, the adhesion strength of the sprayed paint is reduced and the quality is poor.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the main structure schematic diagram of embodiment 1;

2 is a schematic diagram of the internal structure of the cleaning mechanism and the first garbage storage mechanism in FIG. 1;

In the figure, 1, the bottom plate, 2, the cleaning device, 21, the cleaning bin, 22, the guide plate, 3, the cleaning drive mechanism, 31, the shaft, 32, the brush head, 4, the first garbage storage mechanism, 41, Storage bin, 42, First sealing door, 43, Handle, 5, Dust suction mechanism, 51, Dust suction pump, 52, Dust suction pipe, 53, Dust discharge pipe, 54, Dust suction head, 6, Dust filter mechanism, 61 , filter box, 62, filter screen, 63, exhaust hole, 7, paint storage tank, 701, feeding port, 8, spraying mechanism, 81, fluid pump, 82, drain pipe, 83, spraying atomizing head, 84 , suction pipe, 9, level sensor, 10, controller, 11, indicator light, 12, walking wheel, 13, handrail.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1: The municipal road traffic marking spraying device that can remove sundries, as shown in Figure 1, includes a bottom plate 1, the bottom of the bottom plate 1 is provided with a walking wheel 12, and the rear of the bottom plate 1 is provided with a handrail 13, this embodiment The traveling wheel 12 in the middle adopts a roller that cannot be rotated horizontally to adjust the direction, so as to prevent the operator from being difficult to perform the operation of straight driving when pushing the device forward.

The bottom plate 1 is provided with a paint storage box 7 and a spraying mechanism 8 .

The top of the paint storage box 7 is provided with a feeding port 701, and the feeding port 701 is provided with a detachable cover.

The paint storage tank 7 is embedded with a liquid level sensor 9 for monitoring its internal liquid level. The paint storage tank 7 is provided with a controller 10 and an indicator light 11, and the controller 10 is respectively connected with the liquid level sensor 9 and the indicator light 11 for control and connection. .

The indicator light 11 cooperates with the liquid level sensor 9 to indicate the minimum used liquid level value in the paint storage tank 7 , and the minimum used liquid level value is the minimum liquid level at which the spraying mechanism 8 can work normally. When the liquid level in the paint storage tank 7 is lower than the minimum used liquid level value, the controller 10 controls the indicator light 11 to flash to remind the operator to add paint to the paint storage tank 7 .

The spraying mechanism 8 includes a fluid pump 81 arranged on the paint storage tank 7, the controller 10 is controlled and connected to the fluid pump 81, the fluid suction port of the fluid pump 81 is connected to one end of the fluid extraction pipe 84, and the other end of the fluid extraction pipe 84 is connected to the fluid pump 84. The lower part of the paint storage tank 7 communicates with each other.

The liquid discharge port of the fluid pump 81 is connected to one end of the liquid discharge pipe 82, and the other end of the liquid discharge pipe 82 is connected to the spraying atomizing head 83. The spraying atomizing head 83 is located on the outside of the bottom plate 1, and the The exit faces downwards.

The front side of the bottom plate 1 is fixedly provided with a garbage cleaning mechanism. The garbage cleaning mechanism is located in front of the spraying port of the spraying mechanism 8. The garbage cleaning mechanism includes a cleaning device 2 and a first garbage storage mechanism 4. The cleaning device 2 is used to remove the garbage on the ground. Sweep into the first garbage storage mechanism 4 .

Specifically, as shown in FIGS. 1 and 2 , the cleaning device 2 includes a cleaning bin 21 with a lower opening. The rear of the cleaning bin 21 is fixedly provided with a fixing frame, and the rear of the fixing frame is fixedly connected to the front side of the bottom plate 1 .

The first garbage storage mechanism 4 is fixedly arranged at the rear of the cleaning bin 21 , and the front portion of the first garbage storage mechanism 4 and the rear portion of the cleaning bin 21 penetrate through to form a temporary garbage storage entrance.

The bottom of the cleaning bin 21 is fixedly provided with a guide plate 22. The guide plate 22 is inclined from front to back and from bottom to top. The lower end of the guide plate 22 extends to the bottom of the cleaning bin 21 and the bottom plate 1. The lower end is about 5 mm away from the ground, and the upper end of the guide plate 22 extends to the bottom of the garbage temporary storage entrance.

The cleaning bin 21 is provided with a cleaning driving mechanism 3 , and the cleaning driving mechanism 3 is used to sweep the garbage on the ground into the temporary garbage storage entrance through the guide plate 22 .

The cleaning driving mechanism 3 includes a rotating driving mechanism and a brush mechanism. The rotating driving mechanism includes a driving motor fixed on the left side of the cleaning chamber 21 , and the controller 10 is controlled and connected to the driving motor.

The left side of the cleaning bin 21 is fixedly provided with a motor protection case for protecting the driving motor, and the driving motor is located in the motor protection case.

The brush mechanism includes a shaft 32 which is arranged on the cleaning bin 21 on the left and right. The shaft 32 is provided with a brush head 32 along its circumferential direction. The left end of the shaft 32 is connected with the output shaft of the driving motor. There is a shaft protection cover, and the right end of the shaft rod 32 is located in the shaft protection cover.

The brush head 32 is located inside the cleaning bin 21;

When the brush head 32 rotates to the area of the guide plate 22, the lower end of the brush head 32 is always in contact with the guide plate 22, so that the sundries on the ground can be pushed by the brush head 32 along the guide plate 22 to the guide plate 22. Garbage storage entrance.

When the brush head 32 is rotated to the front, the front end of the brush head 32 can contact the interior of the front side of the cleaning compartment 21, so that the brush head 32 can brush the dust and debris attached to the inner wall of the front side of the cleaning compartment 21. Then, the fallen debris is pushed back into the temporary garbage storage inlet by the brush head 32 along the guide plate 22 .

As shown in FIG. 2 , the first garbage storage mechanism 4 includes a storage bin 41 and a first sealing door 42 . The bottom of the storage bin 41 is provided with a first garbage outlet. The vertical section of the first garbage outlet is a T-shaped groove structure. The right end of the garbage outlet extends to just below the right side panel of the storage bin 41 .

The first sealing door 42 includes a bottom plate slid left and right at the first garbage outlet and a vertical plate fixed on the right part of the bottom plate. The vertical section of the bottom plate is a T-shaped plate structure matching the T-shaped groove structure. The bottom plate of the first sealing door 42 is used to block the first garbage outlet, and the front side of the vertical plate is provided with a handle 43 . The first sealing door 42 can be completely pulled out from the first garbage outlet.

The right side of the storage bin 41 is provided with a lever mechanism. The lever mechanism includes a rotating shaft extending in the left-right direction and a lever rotatably arranged on the rotating shaft. The left end of the rotating shaft is fixedly connected to the right part of the storage bin 41 . The lever is used for restricting the forward and backward movement of the first sealing door 42 when the first sealing door 42 closes the first garbage outlet.

In order to reduce the amount of dust mixed in the first garbage storage mechanism 4, separate the dust from large debris (such as leaves, garbage bags, stones, etc.) to prevent excessive dust mixed in the first garbage storage mechanism 4, resulting in the first garbage The dust in the storage mechanism 4 slides out from the entrance of the temporary garbage storage and falls on the ground again. In this embodiment, a dust suction filter mechanism is fixed on the bottom plate 1 . The dust suction filter mechanism is used to suck out the dust raised in the cleaning device 2 and filter and store the dust.

Specifically, as shown in FIG. 1 , the dust collecting and filtering mechanism includes a dust filtering mechanism 6 provided on the bottom plate 1 and a dust filtering mechanism 5 provided on the dust filtering mechanism 6 .

A dust filter mechanism 6 is fixed on the bottom plate 1. The dust filter mechanism 6 includes a filter box 61. A filter screen 62 arranged horizontally is fixed inside the filter box 61. The dust chamber and the air chamber located at the lower part, the lower part of the filter box 61 is provided with an exhaust hole 63 which communicates with the air chamber, the side plate of the filter box 61 is provided with a second sealing door, and the second sealing door is used to open and close the air Chamber.

The dust suction mechanism 5 includes a dust suction pump 51 arranged on the top of the filter box 61 , and the controller 10 is controlled and connected to the dust suction pump 51 .

The suction port of the suction pump 51 is connected to one end of the suction pipe 52 , and the other end of the suction pipe 52 penetrates into the cleaning chamber 21 and is connected to the upper part of the suction head 54 .

The dust suction head 54 has a conical cover structure, the inner diameter of the bottom of the dust suction head 54 is larger than the inner diameter of the dust suction pipe 52 , and the dust suction head 54 is located above the brush head 32 . The dust suction head 54 is used to expand the dust inlet area, so as to improve the dust suction efficiency of the dust suction pipe 52 and reduce the dust remaining in the cleaning bin 21 as much as possible.

The dust discharge port of the vacuum pump 51 is connected to one end of the dust discharge pipe 53, and the other end of the dust discharge pipe 53 is communicated with the dust storage chamber.

The control connection relationship between the controller 10 and the driving motor, the vacuum pump 51 , and the fluid pump 81 described in this embodiment is in the prior art and is relatively common, and the detailed description of the control relationship is not repeated in this embodiment.

The working principle is as follows: (1) The operator holds the handrail 13 and pushes the device to move straight to the front. Start the drive motor and the vacuum pump 51, the drive motor drives the brush mechanism to work, and pushes large pieces of debris (such as leaves, plastic bags, stones, etc.) on the ground into the temporary garbage storage entrance along the guide plate 22, are stored in the first garbage storage mechanism 4 .

During this process, the raised dust gathers in the cleaning bin 21, is then extracted by the dust suction mechanism 5, and is sent into the dust storage chamber on the upper part of the filter box 61, and the dust entering the dust storage chamber is filtered out by the filter screen 62, Left in the dust storage chamber, the clean air passes through the filter screen 62 into the air chamber below, and is then discharged into the outside atmosphere through the exhaust hole 63 .

As shown in FIG. 2 , when the brush head 32 is rotated to the front, the front end of the brush head 32 can contact the interior of the front side of the cleaning chamber 21 , so that the brush head 32 is attached to the inner wall of the front side of the cleaning chamber 21 . The dust and debris are brushed down, and then the fallen debris is pushed back into the temporary garbage storage inlet by the brush head 32 along the guide plate 22 .

(2) When the spraying atomizing head 83 reaches the cleaned ground, start the fluid pump 81, extract the liquid paint from the paint storage tank 7, and then pump the liquid paint to the spraying atomizing head 83, spray and atomize The head 83 sprays the liquid paint on the ground in an atomized state, accelerates the solidification of the paint, and enables the formed traffic markings to be rapidly formed, so as to reduce the risk of the traffic markings being damaged.

(3) When the above spraying work is carried out, when the liquid level in the paint storage tank 7 is lower than the minimum use level value, the controller 10 controls the indicator light 11 to start to flash automatically to remind the operator to add to the paint storage tank 7. coating. The operator turns off the fluid pump 81 through the controller 10 , and then opens the cover at the filling port 701 to add paint into the paint storage tank 7 . After the paint is added, the fluid pump 81 is turned on again to start spraying.

Embodiment 2: The spraying device for municipal road traffic markings that can remove sundries. In this embodiment, the guide plate 22 is no longer provided. The height of the bottom of the cleaning bin 21 from the ground is set to be about 5 mm, so that the cleaning driving mechanism 3 can directly sweep the garbage on the ground into the temporary garbage storage entrance. The other structures are the same as in Example 1.

Embodiment 3: a spraying device for municipal road traffic markings that can remove sundries, in this embodiment, the lever mechanism is no longer provided. The other structures are the same as in Example 1.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the present invention is to be defined by the appended claims rather than the foregoing description, and is therefore intended to fall within the scope of the present invention. All changes within the meaning and scope of equivalents of the claims are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (9)

1. Can clear away town road traffic marking spraying device of debris, including bottom plate (1), the bottom of bottom plate (1) is equipped with walking wheel (12), and the rear portion of bottom plate (1) is equipped with handrail (13), its characterized in that: a paint storage tank (7) and a spraying mechanism (8) are arranged on the bottom plate (1), a liquid inlet of the spraying mechanism (8) is connected with the bottom of the paint storage tank (7), and a spraying port of the spraying mechanism (8) extends to the outer side of the bottom plate (1) and faces downwards;

a garbage cleaning mechanism is fixedly arranged on the front side of the bottom plate (1), the garbage cleaning mechanism is positioned in front of a spraying port of the spraying mechanism (8), the garbage cleaning mechanism comprises a cleaning device (2) and a first garbage storage mechanism (4), and the cleaning device (2) is used for cleaning garbage on the ground into the first garbage storage mechanism (4);

a dust collection and filtration mechanism is fixedly arranged on the bottom plate (1), a dust collection port of the dust collection and filtration mechanism is communicated with the top of the cleaning device (2), and the dust collection and filtration mechanism is used for sucking dust raised in the cleaning device (2) and filtering and storing the dust;

the bottom plate (1) is provided with a controller (10), and the controller (10) is respectively in control connection with the cleaning device (2), the dust collection and filtration mechanism and the spraying mechanism (8).

2. The municipal road traffic marking spraying device capable of removing impurities according to claim 1, wherein: the cleaning device (2) comprises a cleaning bin (21) with a lower opening, a fixing frame is fixedly arranged at the rear part of the cleaning bin (21), and the rear part of the fixing frame is fixedly connected with the front side surface of the bottom plate (1);

the first garbage storage mechanism (4) is fixedly arranged at the rear part of the cleaning bin (21), and the front part of the first garbage storage mechanism (4) is communicated with the rear part of the cleaning bin (21) to form a temporary garbage storage inlet;

a material guide plate (22) is fixedly arranged at the bottom of the cleaning bin (21), the material guide plate (22) is obliquely arranged from front to back and from bottom to top, the lower end of the material guide plate (22) extends to the lower part of the cleaning bin (21) and the bottom plate (1), and the upper end of the material guide plate (22) extends to the bottom of the temporary garbage storage inlet;

a cleaning driving mechanism (3) is arranged in the cleaning bin (21), and the cleaning driving mechanism (3) is used for sweeping garbage on the ground into the temporary garbage storage inlet through a material guide plate (22).

3. The municipal road traffic marking spraying device capable of removing impurities according to claim 2, wherein: the cleaning driving mechanism (3) comprises a rotary driving mechanism and a brush mechanism, the brush mechanism extends along the left-right direction and is rotationally arranged on the inner wall of the cleaning bin (21), and the left end of the brush mechanism is connected with an output shaft of the rotary driving mechanism;

the lowest end of the brush mechanism is positioned in front of the lower end of the material guide plate (22), and the lowest end of the brush mechanism is flush with the bottom of the traveling wheel (12);

when the brush mechanism rotates to the area of the material guide plate (22), the lower part of the brush mechanism is always contacted with the material guide plate (22), so that sundries on the ground can be pushed into the temporary garbage storage port along the material guide plate (22) by the brush mechanism.

4. The municipal road traffic marking spraying device capable of removing impurities according to claim 3, wherein: the front part of the brush mechanism can contact with the inner wall of the front side of the cleaning bin (21).

5. The debris removing, municipal road traffic marking spray apparatus according to any one of claims 1 to 4, wherein: the first garbage storage mechanism (4) comprises a storage bin (41) and a first sealing door (42);

the bottom of the storage bin (41) is provided with a first garbage outlet, the first sealing door (42) is arranged at the first garbage outlet in a left-right sliding mode, and the first sealing door (42) is used for sealing the first garbage outlet.

6. The debris removing coating apparatus for municipal road traffic markings according to claim 5, wherein: the right side of the storage bin (41) is provided with a deflector rod mechanism which is used for limiting the front and back movement of the first sealing door (42) when the first sealing door (42) seals the first garbage outlet.

7. The debris removing coating apparatus for municipal road traffic markings according to claim 6, wherein: the dust collection and filtration mechanism comprises a dust filtration mechanism (6) arranged on the bottom plate (1) and a dust collection mechanism (5) arranged on the dust filtration mechanism (6), a dust collection port of the dust collection mechanism (5) is communicated with the top of the cleaning device (2), and a dust discharge port of the dust collection mechanism (5) is communicated with the dust storage chamber;

the dust suction mechanism (5) is used for sucking air carrying dust from the cleaning device (2), and the dust filtering mechanism (6) is used for filtering and storing the dust in the air.

8. The municipal road traffic marking spraying device capable of removing impurities according to claim 7, wherein: the dust absorption mechanism (5) comprises a dust absorption head (54) arranged in the cleaning bin (21);

the dust collection head (54) is of a conical cover structure, the inner diameter of the bottom of the dust collection head (54) is larger than that of the dust collection pipe (52), and the dust collection head (54) is located above the brush head (32).

9. The clear debris removing device for coating municipal road traffic markings according to any one of claims 6 to 8, wherein: a liquid level sensor (9) for monitoring the liquid level inside the coating storage tank (7) is embedded in the coating storage tank, and a controller (10) is in control connection with the liquid level sensor (9);

be equipped with pilot lamp (11) on coating storage tank (7), controller (10) and pilot lamp (11) control connection, pilot lamp (11) and level sensor (9) cooperation are used for instructing the minimum liquid level value that uses in coating storage tank (7), and the minimum liquid level value that uses is spraying mechanism (8) can normal work's minimum liquid level.

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