Concrete color difference repairing device

Abstract

A concrete color difference repairing device comprises a sprinkling can, a first spraying pipe, a main air inlet pipe communicated with an air pump and a liquid inlet pipe communicated with a protective agent barrel are arranged on a shell of the sprinkling can, the concrete color difference repairing device further comprises a flow dividing pipe, and the flow dividing pipe comprises a first pipe connected with the main air inlet pipe and a second pipe perpendicular to the first pipe. A flow dividing piece is arranged in the second pipe and used for guiding part of gas to flow towards the second pipe when the gas pressure of the gas in the first pipe is larger than a threshold value. By arranging the flow dividing piece, when the gas pressure in the first pipe suddenly increases and is larger than the threshold value, part of gas can be guided to move towards the second pipe, so that the gas pressure in the first pipe is kept stable, and the situation that the spraying amount sprayed by the first spraying pipe is uncontrollable, and consequently spraying of a to-be-repaired area is not uniform is avoided.

Description

Technical Field

[0001] The utility model relates to the field of building construction, in particular to a concrete color difference repairing device. Background Art

[0002] It is a common problem that the concrete surfaces of the exposed foundations of concrete equipment, plain concrete firewalls, converter transformer concrete plazas, and station area walls in UHV converter stations have uneven color. Sometimes there are spots and fine lines. In severe cases, honeycomb surfaces and cracks will appear, which greatly affect the visual quality of concrete and the image of converter station projects. The reasons for the color difference of concrete are impurities in raw materials such as cement, aggregates, water-cement ratio, and admixtures; in addition, the cement hydration reaction will precipitate calcium hydroxide, which reacts with carbon dioxide to easily form white calcium carbonate crystals; in addition, inadequate vibration during the construction process will also cause bubbles and holes to cause color difference, inadequate demoulding time will cause cracks, and inadequate protection of the finished product will also cause concrete pollution and damage, causing color difference.

[0003] In order to repair the color difference of the concrete surface, the method used in the prior art is to spray the prepared color difference protection agent with the target color on the area to be repaired. For example, patent CN217299960U moves the color difference protection agent container and the electric air pump to the vicinity of the area to be repaired by a mobile vehicle, inputs the color difference protection agent stirred in the container component into a spray pot by an output pipe, inputs compressed gas into the spray pot by a ventilation hose, presses out the color difference protection agent in the spray pot by compressed gas, and sprays it on the area to be repaired.

[0004] However, during the spray repair process, factors such as the movement and squeezing of the ventilation hose and the unstable output pressure of the air pump may cause a sudden increase in the air pressure in the spray bottle, resulting in uncontrollable and uneven dosage of the color difference protection sprayed by the spray bottle, affecting the quality of the repair. Summary of the invention

[0005] The utility model aims to provide a device for repairing concrete color difference, which can reduce the gas entering the main air intake pipe when the air pressure in the diverter pipe increases by arranging a diverter pipe with a diverter valve on the main air intake pipe, thereby reducing the uncontrollable spraying amount and uneven spraying caused by the sudden increase of air pressure in the spray pot.

[0006] The utility model is realized by the following technical solutions:

[0007] A concrete color difference repair device includes a spray pot, wherein a first spray pipe, a main air inlet pipe connected to an air pump, and a liquid inlet pipe connected to a protective agent cylinder are arranged on the shell of the spray pot, and the spray pot also includes a shunt pipe, wherein the shunt pipe includes a first pipe connected to the main air inlet pipe and a second pipe perpendicular to the first pipe, wherein a shunt piece is arranged in the second pipe, and the shunt piece is used to guide part of the gas to flow to the second pipe when the gas pressure in the first pipe is greater than a threshold value.

[0008] In the present technical solution, similar to the prior art, the color difference repair device includes a spray pot, an air inlet pipe provided on the spray pot is connected to the protective agent cylinder, and the color difference protective agent in the protective agent cylinder is input into the spray pot by means of a water pump and other components. The main air inlet pipe provided on the spray pot is used to connect with the air pump to allow the air pump to input compressed gas into the spray pot, thereby pressing the color difference protective agent in the spray pot to the first nozzle, and finally spraying the color difference protective agent in the form of droplets through the first nozzle to the area to be repaired on the concrete surface, so that the color of the area to be repaired is consistent with the apparent color of the concrete.

[0009] In the present technical solution, unlike the prior art, the spray pot also includes a diverter pipe, and the diverter pipe includes a first tube and a second tube perpendicular to each other, wherein the first tube is connected between the main air intake pipe and the air pump, and a diverter is arranged in the second tube. The opening and closing of the diverter is controlled by the air pressure in the first tube. When the gas moves to the main air intake pipe through the first tube, if the gas pressure in the first tube suddenly increases and is greater than the threshold, the diverter guides part of the gas to move to the second tube, thereby keeping the air pressure in the first tube stable, avoiding the uncontrollable amount of spraying sprayed by the first nozzle, resulting in uneven spraying of the area to be repaired. Not only that, the gas sprayed from the outlet end of the second tube can prompt the spraying operator that there is a sudden increase in the air pressure in the diverter, so that the operator can check the gas pipeline and the air pump to troubleshoot and improve the safety of the operation.

[0010] Furthermore, the diverter includes a baffle fixed in the second tube, a flow channel connecting the first tube and the second tube is arranged in the baffle, a spring is arranged on the baffle, and a blocking valve is connected to the spring; when the gas pressure in the first tube is less than or equal to a threshold value, the blocking valve blocks the connection between the flow channel and the first tube, and when the gas pressure in the first tube is greater than the threshold value, the blocking valve moves toward the direction of the spring, the spring is compressed, and the flow channel is connected to the first tube.

[0011] In the technical solution, the flow divider disposed in the second tube includes a flow blocker, and in one or more embodiments, the flow blocker is detachably mounted in the second tube. The outer diameter of the flow blocker is equal to the inner diameter of the second tube, so that the gas in the first tube can only enter the second tube through the flow channel disposed on the flow blocker.

[0012] In the present technical solution, an annular groove is provided on the flow blocking member, and an annular sealing valve capable of moving along the annular groove is provided in the annular groove, and a spring is provided between the sealing valve and the annular groove. The elasticity of the spring determines the threshold of the air pressure in the first tube. When the air pressure in the first tube increases suddenly, the gas pushes the annular sealing valve to overcome the elastic force of the spring and move, and exposes the connection between the flow channel and the first tube during the movement, and part of the gas enters the second tube through the connection and the flow channel; when the pressure in the first tube is restored to be equal to or lower than the threshold, the annular sealing valve is reset under the action of the elastic force and blocks the connection between the flow channel and the first tube.

[0013] Furthermore, a partition is provided in the shell, and the partition divides the interior of the shell into a first chamber and a second chamber, wherein the second chamber is connected to the first nozzle, the main air intake pipe and the liquid inlet pipe, and the first chamber is connected to a branch air intake pipe, and the branch air intake pipe is connected to the second pipe.

[0014] In the present technical solution, a partition provided in the shell body divides the interior of the shell body into two parts: a first chamber and a second chamber. The second chamber is used to hold the color difference protection agent, and the gas in the main air intake pipe presses the color difference protection agent in the second chamber out through the first nozzle. In one or more embodiments, the first chamber, which is independent of the second chamber, can be connected to the external atmosphere, so that the operator can observe the gas ejected from the first chamber and understand the sudden increase in air pressure in the diversion pipe, and judge whether the air pump, pressure reducing valve and other components are faulty. In some embodiments, the first chamber can also be filled with water, and the increased air pressure is used to continuously input the gas into the second chamber through the second pipe, and the water flow in the second chamber is pressed to the vicinity of the first nozzle, thereby achieving the purpose of spraying the water flow and the first nozzle at the same time to dilute the paint.

[0015] Furthermore, a nozzle is coaxially arranged on the first nozzle, a plurality of first spray holes are arranged on the nozzle, a second nozzle is sleeved on the outside of the first nozzle, the second nozzle is connected to the first cavity via a connecting pipe, and a plurality of second spray holes are arranged on the second nozzle.

[0016] In the technical solution, a second nozzle is also sleeved outside the first nozzle, and the interior of the second nozzle is connected to the first cavity through a connecting pipe. Therefore, when air flows into the first cavity from the second tube of the diverter tube, if the first cavity is an empty cavity, the air flow in the first cavity moves to the second nozzle through the connecting tube, and finally sprays gas through the second spray hole on the second nozzle to purge the area to be repaired; if the first cavity is loaded with water, after the second air flow enters the first cavity, the water stored in the first cavity is squeezed to the second nozzle through the connecting tube, and finally sprays water droplets through the second spray hole to dilute the color difference protection agent droplets.

[0017] In the present technical solution, by increasing the pressure of the air pump output to be greater than the threshold value, the gas entering the second tube can be continuously used to purge the area to be repaired, or water droplets can be pressed out to dilute the color difference protection agent droplets. This not only stabilizes the air pressure in the main air intake pipe, making the spraying amount controllable, but also can utilize the second nozzle to enrich the paint spraying method, allowing operators to purge the repair area or dilute part of the color difference protection agent according to actual needs, thereby simplifying the spraying process.

[0018] Furthermore, the plurality of second spray holes are divided into 2 to 6 groups, and each group of second spray holes is evenly distributed along the circumference of the end face of the second nozzle. In the technical solution, the plurality of second spray holes are divided into 2 to 6 groups in equal numbers, each group of second spray holes is located at the end face of the second nozzle, and the second spray holes are evenly distributed along the circumference of the end face, so that each second spray hole is evenly distributed around the first spray hole, further improving the uniformity of spraying, purging or dilution, and improving the spraying quality.

[0019] Furthermore, the sum of the areas of the first nozzle holes is 1.2 to 3 times the sum of the areas of the second nozzle holes. In this technical solution, the sum of the areas of all the second nozzle holes should be smaller than the sum of the areas of all the first nozzle holes to avoid the gas and water droplets sprayed from the second nozzle holes from having a significant impact on the spraying of the color difference protection agent liquid; at the same time, the sum of the areas of the first nozzle holes should not be too large, otherwise the dilution effect will be significantly weakened.

[0020] Furthermore, the connecting pipe is connected to the bottom of the first cavity. For the mode in which the first cavity is loaded with water, the connecting pipe connected to the bottom of the first cavity can ensure that the gas transported in the second pipe presses almost all the water in the first cavity into the connecting pipe.

[0021] Furthermore, a retaining ring is coaxially arranged on the outside of the first nozzle, and a water spray outlet is arranged on the retaining ring. The retaining ring can rotate around the first nozzle to an open state and a closed state. In the closed state, the retaining ring closes the second spray hole, and in the open state, the water spray outlet is connected to the second spray hole.

[0022] In this technical solution, the baffle ring can rotate relative to the first nozzle and the second nozzle, and then switch between the closed state and the open state. When the color difference protection agent droplets need to be diluted, the baffle ring is rotated to the open state, and the water in the second nozzle flows through the second spray hole and the water spray port to spray out; when the color difference protection agent droplets do not need to be diluted, the baffle ring is rotated to the closed state, the baffle ring blocks the second spray hole, and water is stored in the second nozzle.

[0023] In the technical solution, the baffle ring is provided to allow the operator to open or close the second nozzle according to the actual dilution demand, and to store water when the second nozzle is closed, thereby further improving the flexibility of operation.

[0024] Furthermore, the number of the water spray outlets is 2 to 6.

[0025] Furthermore, it also includes a placement table, on which a protective agent cylinder and an air pump are arranged. The protective agent cylinder is connected to the liquid inlet pipe of the spray pot through a liquid pipe, and the air pump is connected to the main air inlet pipe of the spray pot through an air pipe.

[0026] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0027] 1. The utility model provides a flow divider, which can guide part of the gas to move to the second tube when the gas pressure in the first tube suddenly increases and exceeds the threshold, thereby maintaining the gas pressure in the first tube stable, avoiding the uncontrollable spraying amount of the first nozzle, resulting in uneven spraying in the area to be repaired;

[0028] 2. The gas ejected from the outlet end of the second tube of the utility model can remind the spraying operator that there is a sudden increase in the air pressure in the diverter, so that the operator can check the gas pipeline and the air pump to eliminate the fault, thereby improving the safety of the operation;

[0029] 3. The utility model can also increase the pressure of the air pump output to be greater than the threshold, continuously use the gas entering the second pipe to purge the area to be repaired, or press out water droplets to dilute the color difference protection agent droplets, which not only stabilizes the air pressure in the main air intake pipe, making the spraying amount controllable, but also can use the second spray pipe to enrich the spraying method of the paint, allowing the operator to purge the repair area or dilute part of the color difference protection agent according to actual needs, simplifying the spraying process;

[0030] 4. The utility model can allow the operator to open or close the second nozzle according to the actual dilution demand by providing a baffle ring, and store water when the second nozzle is closed, thereby further improving the flexibility of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0032] Figure 1 It is a structural schematic diagram of a repair device in a specific embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the structure of a watering can in a specific embodiment of the utility model;

[0034] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0035] Figure 4 for Figure 2A partial enlarged schematic diagram of point B in the middle;

[0036] Figure 5 This is a schematic diagram of the retaining ring in the open state in a specific embodiment of the utility model;

[0037] Figure 6 It is a schematic diagram of the retaining ring in a closed state in a specific embodiment of the utility model.

[0038] Marks and corresponding parts names in the attached drawings:

[0039] 1-Placement table, 2-Protective agent cylinder, 3-Air pump, 4-Spray pot, 5-Liquid pipe, 6-Ventilation pipe, 7-Roller, 8-Push rod;

[0040] 41-shell, 42-first nozzle, 43-liquid inlet pipe, 44-main air inlet pipe, 45-branch air inlet pipe, 46-diverter pipe, 47-partition, 48-water outlet, 49-first cavity, 410-second cavity, 411-connecting pipe, 412-second nozzle, 4121-second spray hole, 413-diverter, 4131-blocking element, 4132-flow channel, 4133-spring, 4134-blocking valve, 414-blocking ring, 415-water outlet, 416-nozzle, 417-first spray hole. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0042] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] like Figures 1 to 4The concrete color difference repair device comprises a spray pot 4, wherein a first spray pipe 42, a main air inlet pipe 44 connected to an air pump 3, and a liquid inlet pipe 43 connected to a protective agent cartridge 2 are arranged on a shell 41 of the spray pot 4, and further comprises a shunt pipe 46, wherein the shunt pipe 46 comprises a first pipe connected to the main air inlet pipe 44, and a second pipe perpendicular to the first pipe, wherein a shunt member 413 is arranged in the second pipe, and the shunt member 413 is used to guide part of the gas to flow to the second pipe when the gas pressure in the first pipe is greater than a threshold value; Figure 3 As shown, the diverter 413 includes a baffle 4131 fixed in the second tube, a flow channel 4132 connecting the first tube and the second tube is arranged in the baffle 4131, a spring 4133 is arranged on the baffle 4131, and a blocking valve 4134 is connected to the spring 4133; when the gas pressure in the first tube is less than or equal to the threshold value, the blocking valve 4134 blocks the connection between the flow channel 4132 and the first tube, and when the gas pressure in the first tube is greater than the threshold value, the blocking valve 4134 moves toward the direction of the spring 4133, the spring 4133 is compressed, and the flow channel 4132 is connected to the first tube.

[0045] In one or more embodiments, the end of the second tube away from the first tube can be connected to the external environment. If the second tube continuously releases gas, it indicates that the air pump or the pressure reducing valve is faulty. In some embodiments, the gas in the second tube can also be guided to the vicinity of the first nozzle, so that the first nozzle sprays the color difference protection agent while spraying the gas to purge the surface of the area to be repaired, or sprays water to dilute the sprayed color difference protection agent to a certain extent.

[0046] In this embodiment, when the gas moves to the main intake pipe through the first pipe, if the gas pressure in the first pipe suddenly increases and is greater than a threshold value, the diverter guides part of the gas to move to the second pipe, thereby maintaining the gas pressure in the first pipe stable, avoiding uncontrollable spraying amount from the first nozzle, resulting in uneven spraying in the area to be repaired.

[0047] In some preferred embodiments, Figure 1 As shown, it also includes a placement table 1, on which a protective agent cartridge 2 and an air pump 3 are arranged. The protective agent cartridge 2 is connected to the liquid inlet pipe 43 of the spray pot 4 via a liquid pipe 5, and the air pump 3 is connected to the main air inlet pipe 44 of the spray pot 4 via a ventilation pipe 6. In one or more embodiments, a roller is arranged at the bottom of the placement table, and a push rod is connected to the placement table to facilitate pushing the placement table to the vicinity of the area to be repaired. In some embodiments, the protective agent cartridge is also equipped with a stirring paddle to deliver the evenly mixed color difference protective agent into the spray pot while stirring.

[0048] Embodiment 2:

[0049] On the basis of Example 1, a partition 47 is provided in the shell 41, and the partition 47 divides the interior of the shell 41 into a first chamber 49 and a second chamber 410, wherein the second chamber 410 is connected to the first nozzle 42, the main air intake pipe 44 and the liquid inlet pipe 43, the first chamber 49 is connected to the branch air intake pipe 45, and the branch air intake pipe 45 is connected to the second pipe, the first nozzle 42 is coaxially provided with a nozzle 416, and the nozzle 416 is provided with a plurality of first spray holes 417, the first nozzle 42 is externally sleeved with a second nozzle 412, the second nozzle 412 is connected to the first chamber 49 via a connecting pipe 411, and the second nozzle 412 is provided with a plurality of second spray holes 4121.

[0050] In this embodiment, by increasing the pressure of the air pump output to be greater than the threshold value, the gas entering the second tube can be continuously used to purge the area to be repaired, or water droplets can be pressed out to dilute the color difference protection agent droplets. This not only stabilizes the air pressure in the main air intake pipe, making the spraying amount controllable, but also enables the second nozzle to enrich the paint spraying method, allowing operators to purge the repair area or dilute part of the color difference protection agent according to actual needs, thereby simplifying the spraying process.

[0051] In one or more embodiments, the plurality of second spray holes 4121 are divided into 2 to 6 groups, and each group of second spray holes 4121 is evenly distributed along the circumference of the end surface of the second nozzle 412 .

[0052] In some preferred embodiments, the sum of the areas of the plurality of first spray holes 417 is 1.2 to 3 times the sum of the areas of the plurality of second spray holes 4121 .

[0053] In some preferred embodiments, the connecting pipe 411 is connected to the bottom of the first chamber 49. In the case where the first chamber is loaded with water, the connecting pipe connected to the bottom of the first chamber can ensure that the gas transported in the second pipe presses almost all the water in the first chamber into the connecting pipe.

[0054] Embodiment 3:

[0055] Based on the above embodiments, Figure 5 and Figure 6 As shown, a retaining ring 414 is coaxially arranged on the outside of the first nozzle 42, and a water spray port 415 is arranged on the retaining ring 414. The retaining ring 414 can rotate around the first nozzle 42 to an open state and a closed state. In the closed state, the retaining ring 414 closes the second spray hole 4121, and in the open state, the water spray port 415 is connected to the second spray hole 4121.

[0056] When the color difference protection agent droplets need to be diluted, the baffle ring is turned to the open state, and the water in the second nozzle flows through the second nozzle hole and the water outlet to be sprayed out; when the color difference protection agent droplets do not need to be diluted, the baffle ring is turned to the closed state, the baffle ring blocks the second nozzle hole, and water is stored in the second nozzle.

[0057] In some preferred embodiments, the number of the water spray ports 415 is 2 to 6. In some embodiments, the water spray ports may correspond to the second spray hole groups one by one, or one water spray port may correspond to multiple second spray hole groups, or multiple water spray ports may correspond to one second spray hole group. By setting the water spray ports, some of the second spray hole groups may be opened or closed, further improving the flexibility of diluting the color difference protection agent.

[0058] The terms "first", "second", etc. (e.g., first spray hole, second spray hole, first nozzle, second nozzle, etc.) used in the present invention are only used to distinguish the corresponding components for the sake of clarity of description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connected" used in the present invention may be directly connected or indirectly connected via other components unless otherwise specified.

[0059] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A concrete color difference repair device, comprising a spray pot (4), wherein a housing (41) of the spray pot (4) is provided with a first spray pipe (42), a main air inlet pipe (44) connected to an air pump (3), and a liquid inlet pipe (43) connected to a protective agent cylinder (2), wherein: The invention also includes a flow divider (46), wherein the flow divider (46) includes a first tube connected to the main air inlet tube (44), and a second tube perpendicular to the first tube, wherein a flow divider (413) is arranged in the second tube, and the flow divider (413) is used to guide part of the gas to flow to the second tube when the gas pressure in the first tube is greater than a threshold value.

2. A concrete color difference repairing device according to claim 1, characterized in that: The flow divider (413) comprises a flow blocker (4131) fixed in the second tube, a flow channel (4132) connecting the first tube and the second tube is arranged in the flow blocker (4131), a spring (4133) is arranged on the flow blocker (4131), and a blocking valve (4134) is connected to the spring (4133); when the gas pressure in the first tube is less than or equal to a threshold value, the blocking valve (4134) blocks the connection between the flow channel (4132) and the first tube, and when the gas pressure in the first tube is greater than the threshold value, the blocking valve (4134) moves toward the spring (4133), the spring (4133) is compressed, and the flow channel (4132) is connected to the first tube.

3. The concrete color difference repairing device according to claim 1 is characterized in that: A partition (47) is provided inside the shell (41), and the partition (47) divides the interior of the shell (41) into a first chamber (49) and a second chamber (410), wherein the second chamber (410) is connected to the first nozzle (42), the main air intake pipe (44) and the liquid intake pipe (43), and the first chamber (49) is connected to a branch air intake pipe (45), and the branch air intake pipe (45) is connected to the second pipe.

4. The concrete color difference repairing device according to claim 3 is characterized in that: A nozzle (416) is coaxially arranged on the first nozzle pipe (42), and a plurality of first spray holes (417) are arranged on the nozzle (416). A second nozzle (412) is sleeved on the outside of the first nozzle pipe (42), and the second nozzle (412) is connected to the first cavity (49) via a connecting pipe (411), and a plurality of second spray holes (4121) are arranged on the second nozzle pipe (412).

5. The concrete color difference repairing device according to claim 4 is characterized in that: The plurality of second spray holes (4121) are divided into 2 to 6 groups, and each group of second spray holes (4121) is evenly distributed along the circumference of the end surface of the second spray pipe (412).

6. The concrete color difference repairing device according to claim 4 is characterized in that: The sum of the areas of the plurality of first spray holes (417) is 1.2 to 3 times the sum of the areas of the plurality of second spray holes (4121).

7. The concrete color difference repairing device according to claim 4 is characterized in that: The connecting pipe (411) is connected to the bottom of the first chamber (49).

8. The concrete color difference repairing device according to claim 4 is characterized in that: A retaining ring (414) is coaxially arranged on the outside of the first nozzle (42), and a water spraying port (415) is arranged on the retaining ring (414). The retaining ring (414) can rotate around the first nozzle (42) to an open state and a closed state. In the closed state, the retaining ring (414) closes the second spraying hole (4121), and in the open state, the water spraying port (415) is connected to the second spraying hole (4121).

9. The concrete color difference repairing device according to claim 8, characterized in that: The number of the water spray outlets (415) is 2 to 6.

10. A concrete color difference repairing device according to any one of claims 1 to 9, characterized in that: The invention also comprises a placing table (1), on which a protective agent cartridge (2) and an air pump (3) are arranged. The protective agent cartridge (2) is connected to a liquid inlet pipe (43) of a spray pot (4) via a liquid passage pipe (5), and the air pump (3) is connected to a main air inlet pipe (44) of the spray pot (4) via an air passage pipe (6).

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