Spraying device and spraying method

Abstract

The present invention relates to the technical field of parts processing, and in particular to a spraying device and a spraying method. The spraying device is used to spray low surface energy paint onto the inner wall of a water pipe, and the spraying device includes a storage tank for storing the low surface energy paint and a nozzle connected to the storage tank; the water pipe is used to be sleeved outside the nozzle, and a spray hole is opened on the nozzle, so that the low surface energy paint in the storage tank can enter the nozzle and be sprayed into the inner wall of the water pipe through the spray hole. The spraying method uses the above-mentioned spraying device. The present invention is to provide a spraying device and a spraying method to alleviate the technical problem in the prior art that the water pipe of the steamer is easily blocked by scale accumulation.

Description

Technical Field

[0001] The invention relates to the technical field of parts processing, and in particular to a spraying device and a spraying method. Background Art

[0002] A steamer is a kitchen appliance with a steam cooking function. It uses a steam generator to spray steam into the inner pot, and cooks the food in the inner pot with high-temperature steam. Not only does it make the food taste good, but it is also easy to operate. It is gradually entering more and more ordinary households.

[0003] During the use of the steamer, scale is prone to accumulate on the inner wall of the water pipe connected to the steam generating device, and after a long time, the scale will become thicker and difficult to clean, which will lead to blockage of the water pipe and affect the normal use of the steamer.

[0004] Therefore, the present application provides a new spraying device and spraying method to address the above problems. Summary of the invention

[0005] The object of the present invention is to provide a spraying device to alleviate the technical problem in the prior art that water pipes of a steamer are prone to scale accumulation and blockage.

[0006] The present invention also aims to provide a spraying method to further alleviate the technical problem in the prior art that water pipes of steam boxes are prone to scale accumulation and blockage.

[0007] Based on the above first purpose, the present invention provides a spraying device, which is used to spray low surface energy paint on the inner wall of a water pipe, and the spraying device includes a storage tank for storing low surface energy paint and a spray pipe connected to the storage tank;

[0008] The water pipe is used to be sleeved outside the spray pipe, and a spray hole is opened on the spray pipe. The low surface energy paint in the storage tank can enter the spray pipe and be sprayed into the inner wall of the water pipe through the spray hole.

[0009] Further, the outer diameter of the nozzle is a first diameter, and the inner diameter of the water pipe is a second diameter;

[0010] When the water pipe is arranged outside the nozzle, the ratio of the first diameter to the second diameter is in the range of 1 / 3 to 2 / 3.

[0011] Furthermore, the nozzle includes one or more branch pipes, and the spray hole is opened in the branch pipe;

[0012] When there is one branch pipe body, the branch pipe body is connected to the material storage tank; when there are multiple branch pipe bodies, the multiple branch pipe bodies can be detachably connected in sequence, and the multiple branch pipe bodies are connected in sequence and connected to the material storage tank.

[0013] Furthermore, along the extending direction perpendicular to the branch pipe body, a plurality of the spray holes are provided, and the plurality of the spray holes are evenly distributed along the circumference of the branch pipe body to form a row of the spray holes;

[0014] Along the extension direction of the branch pipe body, the spray holes are arranged in multiple rows, and the spray holes in the multiple rows are evenly distributed.

[0015] Furthermore, in the same row of the spray holes, the intersection points between the center lines of two adjacent spray holes and the outer diameter of the branch pipe body are respectively the first point and the second point, the distance between the first point and the second point is the first spacing, and the ratio of the first spacing to the spray hole diameter is in the range of 3 to 5;

[0016] And / or, the spacing between two adjacent rows of the nozzle holes is a second spacing, and the ratio of the second spacing to the nozzle hole diameter is in the range of 3-10.

[0017] Furthermore, the two adjacent rows of spray holes are staggered; the two adjacent rows of spray holes are respectively the first row of spray holes and the second row of spray holes;

[0018] Along the extension direction of the branch pipe body, in the first row of spray holes, the projection of the center line of one spray hole is a first projection line, and in the second row of spray holes, the projections of the center lines of two adjacent spray holes are a second projection line and a third projection line respectively;

[0019] The included angle between the first projection line and the second projection line is a first angle, the included angle between the second projection line and the third projection line is a second angle, and the second angle is twice the first angle.

[0020] Furthermore, the spraying device further comprises a diaphragm pump and a reinforcing pump, the feed end of the spray pipe is connected to the storage tank through the diaphragm pump, and the discharge end of the spray pipe is connected to the storage tank through the reinforcing pump;

[0021] The diaphragm pump can pump the low surface energy paint in the material storage tank into the spray pipe, and the booster pump can pump the low surface energy paint in the spray pipe back to the material storage tank.

[0022] Further, when the water pipe is sleeved outside the nozzle, the end of the water pipe close to the feed end of the nozzle is the first end, and the end of the water pipe close to the discharge end of the nozzle is the second end;

[0023] The spraying device further comprises a first sealing joint capable of sealing the first end and a second sealing joint capable of sealing the second end;

[0024] The first sealing joint comprises a sealing cover and a sealing adhesive disposed in the sealing cover, and the first end is disposed in the sealing adhesive to seal the first end;

[0025] The second sealing joint comprises a body, the discharge end of the nozzle is connected with the reinforcement pump through the body, and a sealing portion capable of sealing the second end is arranged on the body.

[0026] Further, the body comprises a head portion, an elastic connecting portion and a tail portion which are connected in sequence, the discharge end of the nozzle is connected to the head portion, the tail portion is connected to the reinforcement pump, and the sealing portion is arranged at the head portion;

[0027] Wherein, the elastic connection portion can be elastically extended and retracted to make the head portion and the tail portion approach or move away from each other.

[0028] Furthermore, the head portion is in the form of a frustum, the larger end face of the frustum is provided with a feeding hole, the smaller end face is connected to the elastic connecting portion, and the sealing portion is provided at the larger end face;

[0029] The nozzle is communicated with the feed hole, and the low surface energy coating in the nozzle can enter the reinforcement pump after passing through the feed hole, the head, the elastic connecting part and the tail in sequence.

[0030] By adopting the above technical solution, the spraying device of the present invention has the following beneficial effects:

[0031] When the spraying device is in operation, the water pipe is sleeved outside the spray pipe, and the low surface energy paint in the storage tank enters the spray pipe and is sprayed into the inner wall of the water pipe through the spray hole, so that a low surface energy coating is formed on the inner wall of the water pipe.

[0032] It should be noted that the surface energy of low surface energy coating is low. Therefore, after the low surface energy coating is sprayed into the inner wall of the water pipe, the low surface energy coating on the inner wall of the water pipe forms a hydrophobic surface, which makes the adhesion of water on the low surface energy coating weaker, resulting in loose adhesion and easy rolling off the inner wall surface of the water pipe.

[0033] To sum up, the spray device of this embodiment is used to spray low surface energy coating on the inner wall of the water pipe, so that a low surface energy coating is formed on the inner wall of the water pipe. When the water pipe is installed in the steamer and connected to the steam generating device, water is not easy to adhere to the inner wall of the water pipe, so that scale is not easy to accumulate on the inner wall of the water pipe. Therefore, the water pipe is not easy to be blocked, thereby extending the service life of the water pipe and the steamer having the water pipe.

[0034] Based on the above second purpose, the present invention provides a spraying method, using the above spraying device, the spraying method comprises:

[0035] S1: Put a water pipe outside the spray pipe of the spraying device;

[0036] S2: allowing the low surface energy coating in the storage tank to enter the spray pipe and spray into the inner wall of the water pipe through the spray hole of the spray pipe;

[0037] S3: removing the water pipe from the nozzle and baking.

[0038] Further, in step S3, when the baking temperature of the water pipe is 80°C to 100°C, the baking time is 5min to 8min;

[0039] Alternatively, when the baking temperature of the water pipe is 180° C. to 200° C., the baking time is 8 min to 10 min.

[0040] Furthermore, the spraying method also includes the step of mixing the coating:

[0041] The formula for preparing the low surface energy coating is: 15% to 20% epoxy modified organic silicon resin, 10% to 15% polyester resin, 10% to 15% silicon dioxide gel and 40% to 65% n-butyl acetate.

[0042] Furthermore, before step S1, the spraying method further comprises:

[0043] Degreasing steps: put the water pipe into the degreasing tank for degreasing, the degreasing temperature is 35℃~40℃, the degreasing time is 3min, the free alkalinity of the degreasing liquid is 20pt~25pt, and the pH is 11~13;

[0044] Drying step: Place the water pipe in a drying furnace for drying at a temperature of 80°C for 20 to 30 minutes.

[0045] By adopting the above technical solution, the spraying method of the present invention has the following beneficial effects:

[0046] The above-mentioned spraying device is used by a spraying method. Accordingly, the spraying method has all the advantages of the above-mentioned spraying device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 A schematic diagram of the structure of a spraying device provided in an embodiment of the present invention (showing a state with a water pipe);

[0049] Figure 2 for Figure 1 One of the partial structural schematic diagrams of the spraying device shown;

[0050] Figure 3 for Figure 2 Sectional view of the AA section;

[0051] Figure 4 for Figure 2 Sectional view of the middle BB section;

[0052] Figure 5 for Figure 1 The second schematic diagram of the partial structure of the spraying device shown;

[0053] Figure 6 for Figure 5 Cross-sectional view of the CC section.

[0054] Reference numerals:

[0055] 1- water pipe; 2- storage tank;

[0056] 3-nozzle; 31-nozzle hole; 32-sub-tube body;

[0057] 4-Diaphragm pump; 5-Enhanced pump;

[0058] 6-first sealing joint; 61-sealing cover; 62-sealing glue;

[0059] 7-second sealing joint; 71-sealing part; 72-head; 73-elastic connecting part; 74-tail; 75-feeding hole;

[0060] a-first diameter; b-second diameter; c-first spacing; d-second spacing; e-first projection line; f-second projection line; g-third projection line;

[0061] X-first angle; Y-second angle. DETAILED DESCRIPTION

[0062] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Embodiment 1

[0066] See also Figure 1 This embodiment provides a spraying device for spraying low surface energy paint onto the inner wall of a water pipe 1. The spraying device includes a storage tank 2 for storing low surface energy paint and a nozzle 3 connected to the storage tank 2; the water pipe 1 is used to be sleeved outside the nozzle 3, see Figure 2 A spray hole 31 is provided on the spray pipe 3 , and the low surface energy paint in the storage tank 2 can enter the spray pipe 3 and be sprayed into the inner wall of the water pipe 1 through the spray hole 31 .

[0067] When the spraying device is in operation, the water pipe 1 is sleeved outside the spray pipe 3, and the low surface energy coating in the storage tank 2 enters the spray pipe 3 and is sprayed into the inner wall of the water pipe 1 through the spray hole 31, so that a low surface energy coating is formed on the inner wall of the water pipe 1.

[0068] It should be noted that the surface energy of the low surface energy coating is relatively low. Therefore, after the low surface energy coating is sprayed into the inner wall of the water pipe 1, the low surface energy coating on the inner wall of the water pipe 1 forms a hydrophobic surface, which makes the adhesion of water on the low surface energy coating weak, resulting in loose adhesion. By using the water's own weight or the impact of water flow, water droplets can easily roll off the inner wall surface of the water pipe 1.

[0069] To sum up, the low surface energy coating is sprayed onto the inner wall of the water pipe 1 by the spraying device of this embodiment, so that a low surface energy coating is formed on the inner wall of the water pipe 1. When the water pipe 1 is installed in the steamer and connected to the steam generating device, water is not easy to adhere to the inner wall of the water pipe 1, so that scale is not easy to accumulate on the inner wall of the water pipe 1. Therefore, the water pipe 1 is not easy to be blocked, thereby extending the service life of the water pipe 1 and the steamer having the water pipe 1.

[0070] Preferably, see Figure 2 In this embodiment, the outer diameter of the nozzle 3 is the first diameter a, and the inner diameter of the water pipe 1 is the second diameter b; when the water pipe 1 is sleeved outside the nozzle 3, the ratio of the first diameter a to the second diameter b is in the range of 1 / 3 to 2 / 3.

[0071] Optionally, the ratio of the first diameter a to the second diameter b is 1 / 3, 5 / 12, 1 / 2, 7 / 12 or 2 / 3, etc.

[0072] This arrangement allows the water pipe 1 to be spaced apart from the nozzle 3 , so that the inner wall of the water pipe 1 will not block the spray hole 31 of the nozzle 3 , and the low surface energy coating can be smoothly sprayed into the inner wall of the water pipe 1 through the spray hole 31 .

[0073] Optionally, the diameter of the spray hole 31 ranges from 1.0 mm to 1.2 mm. For example, the diameter of the spray hole 31 is 1.0 mm, 1.1 mm, or 1.2 mm.

[0074] Preferably, see Figure 1 and Figure 5 In this embodiment, the nozzle 3 includes one or more branch pipe bodies 32, and the spray hole 31 is opened in the branch pipe body 32; when there is one branch pipe body 32, one branch pipe body 32 is connected to the storage tank 2; when there are multiple branch pipe bodies 32, the multiple branch pipe bodies 32 can be detachably connected in sequence, and the multiple branch pipe bodies 32 are connected in sequence and connected to the storage tank 2.

[0075] It should be noted that the number and shape of the branch pipe bodies 32 are selected according to the shape and length of the water pipe 1 .

[0076] Specifically, when the water pipe 1 is a straight pipe, the branch pipe body 32 is a straight pipe; when the water pipe 1 is a curved pipe, that is, the water pipe 1 has both a straight pipe part and a curved pipe part, the branch pipe body 32 is selected to have both a straight pipe and a curved pipe, and the straight pipe and the curved pipe are connected. When the length of the water pipe 1 is long, multiple branch pipe bodies 32 need to be connected in sequence to adapt to the length of the water pipe 1, for example, there are two, three or four branch pipe bodies 32; when the length of the water pipe 1 is short, one branch pipe body 32 can pass through the water pipe 1.

[0077] With such an arrangement, the spraying device can spray straight water pipes 1 or curved water pipes 1, and can also spray long water pipes 1 or short water pipes 1, thereby improving the applicability of the spraying device.

[0078] Preferably, a plurality of spray holes 31 are provided on the branch pipe body 32 , and the plurality of spray holes 31 are arranged at intervals on the branch pipe body 32 , thereby increasing the spraying area of ​​the low surface energy coating on the inner wall of the water pipe 1 , and further improving the hydrophobic performance of the inner wall of the water pipe 1 .

[0079] Optionally, the plurality of branch pipe bodies 32 are connected by means of snap connection, buckle connection or thread connection. Figure 5 In this embodiment, adjacent branch pipe bodies 32 are nested and connected.

[0080] That is to say, the two adjacent branch bodies 32 are respectively the first branch body 32 and the second branch body 32 , the outer wall of one end of the first branch body 32 has a smaller diameter, and the end of the first branch body 32 with the smaller diameter is nested in the second branch body 32 to achieve a nested connection between the two adjacent branch bodies 32 .

[0081] Therefore, when the branch pipe bodies 32 need to be connected, one only needs to be embedded in the other branch pipe body 32. When the nozzle 3 needs to be disassembled, one only needs to be pulled out from the other branch pipe body 32. The operation is simple, convenient, and time-saving and labor-saving.

[0082] Such an arrangement improves the sealing performance of the connection between adjacent branch pipe bodies 32 and prevents leakage of the low surface energy coating to a certain extent.

[0083] Preferably, the nesting depth between adjacent branch pipe bodies 32 ranges from 3 mm to 5 mm, for example, the nesting depth between adjacent branch pipe bodies 32 is 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc. A longer nesting depth further improves the sealing of the connection between adjacent branch pipe bodies 32 .

[0084] Preferably, see Figure 3 and Figure 4 In this embodiment, a plurality of spray holes 31 are provided along the extending direction perpendicular to the branch pipe body 32, and the plurality of spray holes 31 are evenly distributed along the circumference of the branch pipe body 32 to form a row of spray holes 31; please continue to refer to Figure 2 Along the extension direction of the branch pipe body 32, the spray holes 31 are arranged in multiple rows, and the multiple rows of spray holes 31 are evenly distributed.

[0085] With such an arrangement, the spray holes 31 are evenly arranged on the branch pipe body 32 , so that the low surface energy coating sprayed through the spray holes 31 is more evenly distributed on the inner wall of the water pipe 1 , further improving the hydrophobicity of the inner wall of the water pipe 1 .

[0086] Optionally, see Figure 4 In the same row of spray holes 31, the intersection points between the center lines of two adjacent spray holes 31 and the outer diameter of the branch pipe body 32 are respectively the first point and the second point, the distance between the first point and the second point is the first spacing c, and the ratio of the first spacing c to the diameter of the spray hole 31 ranges from 3 to 5; for example, the ratio of the first spacing c to the diameter of the spray hole 31 is 3, 4 or 5, etc.

[0087] Alternatively, see Figure 2The spacing between two adjacent rows of nozzle holes 31 is a second spacing d, and the ratio of the second spacing d to the diameter of the nozzle holes 31 is in the range of 3 to 10; for example, the ratio of the second spacing d to the diameter of the nozzle holes 31 is 3, 4, 5, 6, 7, 8, 9 or 10, etc.

[0088] Preferably, in the same row of spray holes 31, the intersection points between the center lines of two adjacent spray holes 31 and the outer diameter of the branch pipe body 32 are respectively the first point and the second point, the distance between the first point and the second point is the first spacing c, and the ratio of the first spacing c to the diameter of the spray holes 31 is in the range of 3 to 5; and the spacing between two adjacent rows of spray holes 31 is the second spacing d, and the ratio of the second spacing d to the diameter of the spray holes 31 is in the range of 3 to 10.

[0089] Preferably, see Figure 2 In this embodiment, two adjacent rows of spray holes 31 are staggered.

[0090] Such a configuration increases the spraying area of ​​the low surface energy coating sprayed onto the inner wall of the water pipe 1 through the spray hole 31, increases the area of ​​the low surface energy coating, further improves the hydrophobicity of the inner wall of the water pipe 1, and prevents scale accumulation.

[0091] Preferably, see Figure 3 and Figure 4 In this embodiment, two adjacent rows of spray holes 31 are respectively a first row of spray holes and a second row of spray holes; along the extension direction of the branch pipe body 32, in the first row of spray holes, the projection of the center line of one spray hole 31 is a first projection line e, and in the second row of spray holes, the projections of the center lines of two adjacent spray holes 31 are respectively a second projection line f and a third projection line g; the angle between the first projection line e and the second projection line f is a first angle X, and the angle between the second projection line f and the third projection line g is a second angle Y, and the second angle Y is twice the first angle X.

[0092] That is, along the extension direction of the branch pipe body 32 , one spray hole 31 in the first row of spray holes is projected onto the middle position between two adjacent spray holes 31 in the first row of spray holes, so that the spray holes 31 in the two adjacent rows are staggered evenly.

[0093] Preferably, see Figure 1 In this embodiment, the spraying device also includes a diaphragm pump 4 and a reinforced pump 5. The feed end of the nozzle 3 is connected to the storage tank 2 through the diaphragm pump 4, and the discharge end of the nozzle 3 is connected to the storage tank 2 through the reinforced pump 5; the diaphragm pump 4 can pump the low surface energy paint in the storage tank 2 into the nozzle 3, and the reinforced pump 5 can pump the low surface energy paint in the nozzle 3 back to the storage tank 2.

[0094] With such an arrangement, when it is necessary to spray low surface energy paint on the inner wall of the water pipe 1, the water pipe 1 is firstly mounted outside the nozzle 3 of the spraying device, so that the water pipe 1 is connected to the spraying device. Then the diaphragm pump 4 and the booster pump 5 are turned on, and the low surface energy paint in the storage tank 2 is pumped into the nozzle 3 through the diaphragm pump 4. Under the pressure of the diaphragm pump 4, the low surface energy paint can be sprayed to the inner wall of the water pipe 1 through the spray hole 31, so that a low surface energy coating is formed on the inner wall of the water pipe 1. The remaining low surface energy paint in the nozzle 3 is pumped back to the storage tank 2 through the booster pump 5, thereby realizing the circulation of the low surface energy paint.

[0095] It should be noted that the arrangement of the enhanced pump 5 assists the diaphragm pump 4 to increase the pressure in the spraying device, making the flow of the low surface energy coating in the entire spraying device more stable and uniform.

[0096] After the inner wall of the water pipe 1 is sprayed, the diaphragm pump 4 is turned off, and the remaining low surface energy paint in the spray pipe 3 is pumped back to the storage tank 2 through the booster pump 5 for unified recovery and storage.

[0097] Optionally, when the spraying device is working, the working pressure of the diaphragm pump 4 is set to 0.3Mpa~0.5Mpa, the suction pressure of the booster pump 5 is 0.3Mpa~0.5Mpa, and the opening time is maintained at 5S~15S. When the low surface energy paint flows through the nozzle 3, it is sprayed out from the spray hole 31 and sprayed onto the inner wall of the water pipe 1 to form a paint film. The excess low surface energy paint is pumped away and returned to the storage tank 2.

[0098] Preferably, see Figure 2 and Figure 5 In this embodiment, when the water pipe 1 is sleeved outside the nozzle 3, the end of the water pipe 1 close to the feed end of the nozzle 3 is the first end, and the end of the water pipe 1 close to the discharge end of the nozzle 3 is the second end; the spraying device also includes a first sealing joint 6 that can seal the first end and a second sealing joint 7 that can seal the second end.

[0099] After the water pipe 1 is sleeved outside the nozzle 3, the low surface energy paint sprayed onto the inner wall of the water pipe 1 through the spray hole 31 is easy to leak through the first end or the second end. In this embodiment, the first end is sealed by the first sealing joint 6, and the second end is sealed by the second sealing joint 7 to prevent paint leakage.

[0100] Preferably, see Figure 2 and Figure 5 In this embodiment, the first sealing joint 6 includes a sealing cover 61 and a sealant 62 arranged in the sealing cover 61, and the first end is arranged in the sealant 62 to seal the first end; the second sealing joint 7 includes a body, the discharge end of the nozzle 3 is connected to the reinforcing pump 5 through the body, and a sealing portion 71 capable of sealing the second end is arranged on the body.

[0101] Optionally, the diaphragm pump 4 is connected to the nozzle 3 through a first pipe, and the sealing cover 61 is detachably connected to the first pipe; the body is connected to the enhanced pump 5 through a second pipe, and the body is plug-connected to the second pipe.

[0102] Preferably, please continue to see Figure 5 In this embodiment, the main body includes a head portion 72, an elastic connecting portion 73 and a tail portion 74 which are connected in sequence, the discharge end of the nozzle 3 is connected to the head portion 72, the tail portion 74 is connected to the reinforcing pump 5, and the sealing portion 71 is arranged on the head portion 72; wherein the elastic connecting portion 73 can be elastically extended and retracted to make the head portion 72 and the tail portion 74 approach or move away from each other.

[0103] With such an arrangement, the discharge end of the nozzle 3 is connected to the head portion 72 , and is connected to the reinforcing pump 5 via the head portion 72 , the elastic connecting portion 73 and the tail portion 74 in sequence.

[0104] When the water pipe 1 needs to be installed, it is first compressed toward the side away from the diaphragm pump 4 through the elastic connecting portion 73 so that the head portion 72 and the tail portion 74 are close to each other, providing space for the installation of the water pipe 1. After the water pipe 1 is sleeved outside the nozzle 3, one end of the nozzle 3 is connected to the diaphragm pump 4, and the other end corresponds to the head portion 72. The elastic connecting portion 73 is released to make the head portion 72 and the tail portion 74 move away from each other, so that the head portion 72 is close to the nozzle 3 and the second end of the water pipe 1. Under the pre-tightening force of the elastic connecting portion 73, the head portion 72 abuts against the second end of the water pipe 1 through the sealing portion 71, thereby achieving sealing of the second end, and the discharge end of the nozzle 3 is connected to the head portion 72.

[0105] With the arrangement of the main body, the installation of the water pipe 1 and the nozzle 3 is more convenient and simple, and the sealing of the second end of the water pipe 1 is more reliable.

[0106] Preferably, see Figure 5 and Figure 6 In this embodiment, the head 72 is a frustum, the larger end face of the frustum is provided with a feeding hole 75, the smaller end face is connected to the elastic connecting portion 73, and the sealing portion 71 is arranged at the larger end face; the nozzle 3 is connected with the feeding hole 75, and the low surface energy coating in the nozzle 3 can enter the reinforcing pump 5 after passing through the feeding hole 75, the head 72, the elastic connecting portion 73 and the tail 74 in sequence.

[0107] The head 72 of the frustum allows the paint to enter the body more quickly and evenly, thereby improving the efficiency of spraying the inner wall of the water pipe 1.

[0108] Embodiment 2

[0109] Embodiment 2 provides a spraying method, which uses the spraying device of embodiment 1. The technical features of the spraying device disclosed in embodiment 1 are also applicable to this embodiment, and the technical features of the spraying device disclosed in embodiment 1 will not be described repeatedly.

[0110] The spraying method provided in this embodiment uses the above-mentioned spraying device, and the spraying method includes:

[0111] S1: The water pipe 1 is placed outside the spray pipe 3 of the spraying device.

[0112] S2: The low surface energy paint in the storage tank 2 enters the spray pipe 3 and is sprayed into the inner wall of the water pipe 1 through the spray hole 31 of the spray pipe 3.

[0113] S3: Remove the water pipe 1 from the nozzle 3 and bake it.

[0114] With such an arrangement, after the water pipe 1 is baked and dried, a low surface energy coating is formed on the inner wall of the water pipe 1, and the inner wall has a non-stick property. Therefore, the inner wall of the water pipe 1 is not easily adhered to by scale after long-term use, further alleviating the technical problem in the prior art that the water pipe 1 of the steamer is easily blocked by scale accumulation.

[0115] Optionally, in step S3, when the baking temperature of the water pipe 1 is 80°C to 100°C, the baking time is 5min to 8min; or, when the baking temperature of the water pipe 1 is 180°C to 200°C, the baking time is 8min to 10min.

[0116] Among them, when the baking temperature of the water pipe 1 is 80℃~100℃, the baking time is 5min~8min, for example, the baking temperature is 80℃, and the baking time is 5min; or, the baking temperature is 85℃, and the baking time is 6min; or, the baking temperature is 90℃, and the baking time is 7min; or, the baking temperature is 100℃, and the baking time is 8min.

[0117] When the baking temperature of the water pipe 1 is 180°C to 200°C, the baking time is 8 minutes to 10 minutes. For example, when the baking temperature is 180°C, the baking time is 8 minutes; or, when the baking temperature is 190°C, the baking time is 9 minutes; or, when the baking temperature is 200°C, the baking time is 10 minutes.

[0118] Preferably, in this embodiment, the spraying method also includes a coating preparation step: the formula of the low surface energy coating is: 15% to 20% epoxy modified silicone resin, 10% to 15% polyester resin, 10% to 15% silica gel and 40% to 65% n-butyl acetate.

[0119] For example, epoxy-modified silicone resin accounts for 15%, 17%, 19% or 20% etc.; polyester resin accounts for 10%, 12%, 14% or 15% etc.; silica gel accounts for 10%, 12%, 14% or 15% etc.; n-butyl acetate accounts for 40%, 50%, 60% or 65% etc.

[0120] Preferably, before step S1, the spraying method further comprises:

[0121] Degreasing steps: put the water pipe 1 into the degreasing tank for degreasing, the degreasing temperature is 35℃~40℃, the degreasing time is 3min, the free alkalinity of the degreasing liquid is 20pt~25pt, and the pH is 11~13.

[0122] Drying step: Place the water pipe 1 into a drying furnace for drying at a temperature of 80°C for 20 to 30 minutes.

[0123] It should be noted that degreasing is also called oil removal process, which is used to clean the oil stains on the surface of the water pipe 1 to ensure the quality of subsequent processes.

[0124] The spraying method of this embodiment has the advantages of the spraying device of the first embodiment, which have been described in detail in the first embodiment and will not be repeated here.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spraying device, characterized in that: The spraying device is used for spraying low surface energy paint onto the inner wall of a water pipe (1), and the spraying device comprises a storage tank (2) for storing the low surface energy paint and a spray pipe (3) connected to the storage tank (2); The water pipe (1) is used to be sleeved outside the spray pipe (3), and the spray pipe (3) is provided with a spray hole (31), so that the low surface energy paint in the storage tank (2) can enter the spray pipe (3) and be sprayed into the inner wall of the water pipe (1) through the spray hole (31); The feed end of the nozzle (3) is in communication with the storage tank (2), and the discharge end of the nozzle (3) is in communication with the storage tank (2); the low surface energy coating in the storage tank (2) can enter the nozzle (3), and the low surface energy coating in the nozzle (3) can return to the storage tank (2); When the water pipe (1) is sleeved outside the nozzle (3), the end of the water pipe (1) close to the feeding end of the nozzle (3) is the first end, and the end of the water pipe (1) close to the discharging end of the nozzle (3) is the second end; the spraying device further comprises a first sealing joint (6) capable of sealing the first end and a second sealing joint (7) capable of sealing the second end.

2. The spraying device according to claim 1, characterized in that: The outer diameter of the nozzle (3) is a first diameter (a), and the inner diameter of the water pipe (1) is a second diameter (b); When the water pipe (1) is sleeved outside the nozzle (3), the ratio of the first diameter (a) to the second diameter (b) is in the range of 1 / 3 to 2 / 3.

3. The spraying device according to claim 1, characterized in that: The nozzle (3) comprises one or more branch pipe bodies (32), and the nozzle hole (31) is opened in the branch pipe body (32); When one branch pipe body (32) is provided, the branch pipe body (32) is connected to the material storage tank (2); when multiple branch pipe bodies (32) are provided, the multiple branch pipe bodies (32) are detachably connected in sequence, and the multiple branch pipe bodies (32) are connected in sequence to communicate with the material storage tank (2).

4. The spraying device according to claim 3, characterized in that: A plurality of the spray holes (31) are provided along an extension direction perpendicular to the branch pipe body (32), and the plurality of spray holes (31) are evenly distributed along the circumference of the branch pipe body (32) to form a row of the spray holes (31); Along the extension direction of the branch pipe body (32), the spray holes (31) are arranged in multiple rows, and the multiple rows of spray holes (31) are evenly distributed.

5. The spraying device according to claim 4, characterized in that: In the same row of the spray holes (31), the intersection points between the center lines of two adjacent spray holes (31) and the outer diameter of the branch pipe body (32) are respectively a first point and a second point, the distance between the first point and the second point is a first spacing (c), and the ratio of the first spacing (c) to the diameter of the spray hole (31) is in the range of 3 to 5; And / or, the spacing between two adjacent rows of the spray holes (31) is a second spacing (d), and the ratio of the second spacing (d) to the diameter of the spray holes (31) is in the range of 3 to 10.

6. The spraying device according to claim 4, characterized in that: The spray holes (31) in two adjacent rows are arranged in a staggered manner; the spray holes (31) in two adjacent rows are respectively a first row of spray holes and a second row of spray holes; Along the extension direction of the branch pipe body (32), in the first row of spray holes, the projection of the center line of one spray hole (31) is a first projection line (e), and in the second row of spray holes, the projections of the center lines of two adjacent spray holes (31) are a second projection line (f) and a third projection line (g), respectively; The angle between the first projection line (e) and the second projection line (f) is a first angle (X), the angle between the second projection line (f) and the third projection line (g) is a second angle (Y), and the second angle (Y) is twice the first angle (X).

7. The spraying device according to any one of claims 1 to 6, characterized in that: The spraying device further comprises a diaphragm pump (4) and a reinforcing pump (5), the feed end of the nozzle (3) is connected to the storage tank (2) through the diaphragm pump (4), and the discharge end of the nozzle (3) is connected to the storage tank (2) through the reinforcing pump (5); The diaphragm pump (4) can pump the low surface energy paint in the storage tank (2) into the nozzle (3), and the booster pump (5) can pump the low surface energy paint in the nozzle (3) back to the storage tank (2).

8. The spraying device according to claim 7, characterized in that: The first sealing joint (6) comprises a sealing cover (61) and a sealing glue (62) arranged in the sealing cover (61), and the first end is arranged in the sealing glue (62) to seal the first end; The second sealing joint (7) comprises a body, the discharge end of the nozzle (3) is connected to the reinforcement pump (5) through the body, and a sealing portion (71) capable of sealing the second end is provided on the body.

9. The spraying device according to claim 8, characterized in that: The body comprises a head portion (72), an elastic connecting portion (73) and a tail portion (74) which are connected in sequence, the discharge end of the nozzle (3) is connected to the head portion (72), the tail portion (74) is connected to the reinforcing pump (5), and the sealing portion (71) is arranged on the head portion (72); The elastic connection portion (73) is capable of elastic expansion and contraction so as to move the head portion (72) and the tail portion (74) closer to or farther from each other.

10. The spraying device according to claim 9, characterized in that: The head portion (72) is in the form of a frustum, the larger end surface of the frustum is provided with a feeding hole (75), the smaller end surface is connected to the elastic connecting portion (73), and the sealing portion (71) is provided at the larger end surface; The nozzle (3) is connected to the feed hole (75), and the low surface energy coating in the nozzle (3) can enter the reinforcing pump (5) after passing through the feed hole (75), the head (72), the elastic connecting part (73) and the tail (74) in sequence.

11. A spraying method, characterized in that: Using the spraying device according to any one of claims 1 to 10, the spraying method comprises: S1: placing a water pipe (1) on the outside of the spray pipe (3) of the spraying device; S2: allowing the low surface energy coating in the storage tank (2) to enter the spray pipe (3) and spray into the inner wall of the water pipe (1) through the spray hole (31) of the spray pipe (3); S3: removing the water pipe (1) from the nozzle (3) and baking it.

12. The spraying method according to claim 11, characterized in that: In step S3, when the baking temperature of the water pipe (1) is 80° C. to 100° C., the baking time is 5 min to 8 min; Alternatively, when the baking temperature of the water pipe (1) is 180° C. to 200° C., the baking time is 8 min to 10 min.

13. The spraying method according to claim 11, characterized in that: The spraying method also includes the step of mixing the coating: The formula for preparing the low surface energy coating is: 15% to 20% epoxy modified organic silicon resin, 10% to 15% polyester resin, 10% to 15% silicon dioxide gel and 40% to 65% n-butyl acetate.

14. The spraying method according to claim 11, characterized in that: Before step S1, the spraying method further comprises: Degreasing step: placing the water pipe (1) into a degreasing tank for degreasing, the degreasing temperature is 35°C to 40°C, the degreasing time is 3 minutes, the free alkalinity of the degreasing liquid is 20pt to 25pt, and the pH is 11 to 13; Drying step: placing the water pipe (1) into a drying furnace for drying at a temperature of 80°C for a drying time of 20 to 30 minutes.

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