Water-based paint filling preheating device

Abstract

The utility model relates to the technical field of coating processing equipment, in particular to a water-based coating filling and preheating device which comprises a tank body, a heat insulation plate, a first heating device, a temperature adjusting device, a second heating device and a conveying pipe, the tank body is provided with a containing cavity, the heat insulation plate divides the containing cavity into an upper cavity and a lower cavity, the first heating device heats the upper cavity, and the second heating device heats the lower cavity. The temperature adjusting device cools the upper cavity, the second heating device heats the lower cavity, the conveying pipe is provided with a feeding port and a discharging port, the feeding port and the discharging port both penetrate through the containing cavity and extend out of the tank body, the middle of the conveying pipe penetrates through the upper cavity and the lower cavity in a reciprocating mode, and the second heating device is kept in a starting state. During spraying, the feeding port, the discharging port and the first heating device are started, and the temperature adjusting device is closed; and when spraying is stopped, the feeding port, the discharging port and the first heating device are closed, and the temperature adjusting device is started. According to the utility model, the degree of reaction between the water-based paint and the air can be reduced, so that the water-based paint keeps good performance.

Description

Technical Field

[0001] The utility model relates to the technical field of paint processing equipment, in particular to a water-based paint filling and preheating device. Background Art

[0002] Water-based paints are primarily water-based. Compared to traditional solvent-based paints, they offer advantages such as environmental friendliness, low toxicity, and low volatile organic compound (VOC) emissions. Water-based paints also release very low levels of organic compounds during the drying process, meeting environmental and health protection requirements.

[0003] Because water has a high latent heat of evaporation—five to seven times that of common solvents—water-based paints require a moderately increased drying heat capacity. Furthermore, water evaporates more slowly than organic solvents, resulting in longer drying times for water-based paints. Therefore, water-based paints generally require preheating before application.

[0004] However, preheating typically requires draining water-based paint stored in sealed containers into a preheating device. Existing preheating devices often focus solely on preheating performance, overlooking the potential for the water-based paint to react with oxygen in the air during the preheating process. When certain water-based paints contain unsaturated fatty acids or other easily oxidized ingredients, oxidation reactions can cause the paint to deteriorate, discolor, or otherwise degrade, affecting the coating film. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a water-based paint filling and preheating device, which is designed to reduce the degree of reaction between the water-based paint and oxygen in the air during preheating, thereby ensuring that the preheated water-based paint maintains good performance as much as possible.

[0006] According to an embodiment of the present invention, a water-based paint filling preheating device includes a tank body, an insulation board, a first heating device, a temperature regulating device, a second heating device, and a conveying pipe. The interior of the tank body is provided with a accommodating chamber, and the insulation board is arranged in the accommodating chamber to divide the accommodating chamber into an upper chamber and a lower chamber distributed up and down. The first heating device is used to heat the upper chamber, the temperature regulating device is used to cool the upper chamber, and the second heating device is used to heat the lower chamber. The conveying pipe has a feed port and a discharge port, and the feed port and the discharge port both pass through the accommodating chamber and extend out of the tank body. The middle part of the conveying pipe reciprocates through the upper chamber and the lower chamber, wherein the second heating device remains in an activated state. When the water-based paint is sprayed, the feed port, the discharge port and the first heating device are activated, and the temperature regulating device is turned off; when the water-based paint stops spraying, the discharge port and the first heating device are closed, and the temperature regulating device is turned on.

[0007] According to some embodiments of the present invention, the tank body is provided with a heating chamber, which is located on the side wall of the upper chamber and is filled with a heat-conducting medium; the first heating device includes a first heating coil, a first switching device, and a liquid filling and discharge device, the first heating coil is arranged in the heating chamber, the first switching device is used to switch the current on the first heating coil, and the liquid filling and discharge device is connected to the heating chamber, wherein, when the water-based paint is sprayed, the first switching device is closed; when the water-based paint stops spraying, the first switching device is disconnected, and the liquid filling and discharge device discharges the heat-conducting medium in the heating chamber.

[0008] According to some embodiments of the present invention, the upper chamber is filled with coolant, and the temperature regulating device includes a circulating liquid guiding device, a drainage device, and a gas transmission device. The circulating liquid guiding device is connected to the upper chamber and is used to circulate coolant into the upper chamber. The drainage device is connected to the upper chamber and is used to discharge the coolant in the upper chamber. The gas transmission device is connected to the upper chamber and is used to pass insulating gas into the upper chamber. When the water-based paint is sprayed, the drainage device and the gas transmission device are started; when the water-based paint stops spraying, the drainage device and the gas transmission device are closed, and the circulating liquid guiding device is started.

[0009] According to some embodiments of the present invention, the lower chamber is filled with a heat-conducting medium; the second heating device includes a second heating coil and a second switching device, the second heating coil is arranged in the lower chamber, and the second switching device is used to switch the current on the second heating coil; wherein, the second switching device remains in a closed state.

[0010] According to some embodiments of the present invention, an opening and closing valve is provided on the insulation board, and the delivery pipe located in the upper chamber and the delivery pipe located in the lower chamber are connected together through the opening and closing valve, wherein when the water-based paint is sprayed, the opening and closing valve is opened; when the water-based paint stops spraying, the opening and closing valve is closed.

[0011] According to some embodiments of the present invention, the delivery pipe located in the upper chamber and the delivery pipe located in the lower chamber are both spiral-shaped.

[0012] According to some embodiments of the present invention, at least one nozzle that can be opened and closed is provided at the discharge port, and one end of the nozzle is connected to the conveying pipe.

[0013] According to some embodiments of the present invention, the end of the nozzle communicating with the delivery pipe is tapered, and the small end is close to the nozzle.

[0014] According to some embodiments of the present invention, a third heating device is provided on the nozzle for heating the nozzle.

[0015] According to some embodiments of the present invention, the water-based paint filling preheating device also includes a first temperature sensor, a second temperature sensor, and a control unit. The first temperature sensor is arranged in the upper chamber for detecting the temperature in the upper chamber, and the second temperature sensor is arranged in the lower chamber for detecting the temperature in the lower chamber. The control unit is electrically connected to the first heating device, the temperature regulating device, the second heating device, the first temperature sensor, and the second temperature sensor, and is used to control the operating status of the first heating device and the temperature regulating device according to the temperature data collected by the first temperature sensor, and is used to control the operating status of the second heating device according to the temperature data collected by the second temperature sensor.

[0016] The water-based paint filling and preheating device according to the embodiment of the present invention has at least the following beneficial effects: before spraying the water-based paint, the water-based paint stored in the sealed container is drained from the feed port to the middle of the delivery pipe. At this time, the second heating device is always kept in the started state, so that the delivery pipe part located in the lower chamber is heated, thereby preheating the water-based paint in the delivery pipe part, and the delivery pipe part located in the upper chamber solidifies under the cooling effect of the temperature regulating device, so that the solidified water-based paint in the delivery pipe part blocks the transmission of the water-based paint in the delivery pipe, thereby avoiding the oxygen in the air at the discharge port and the water-based paint in the delivery pipe from being heated. contact, reducing the amount of reaction between the water-based paint and oxygen in the delivery pipe; and when spraying the water-based paint, the temperature regulating device is closed, and the delivery pipe portion located in the upper chamber is melted under the heating action of the first heating device. At this time, the water-based paint stored in the sealed container is drained from the feed port to the middle part of the delivery pipe and ejected from the discharge port; when the water-based paint stops spraying, the discharge port and the first heating device are closed, the temperature regulating device is reopened, and the delivery pipe portion located in the upper chamber is re-solidified under the cooling action of the temperature regulating device, thereby preventing oxygen in the air from entering from the discharge port and contacting the water-based paint in the delivery pipe to cause an oxidation reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a water-based paint filling and preheating device in one embodiment of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of a heat insulation board in one embodiment of the present utility model;

[0019] Figure 3 Schematic diagram of the structure of the nozzle in one embodiment of the present utility model;

[0020] Figure 4 This is a block diagram of the connection between the first temperature sensor, the second temperature sensor, and the control unit in one embodiment of the present invention;

[0021] In the picture:

[0022] Tank body 100, accommodating chamber 110, heating chamber 120, upper chamber 111, lower chamber 112, thermal insulation plate 200, opening and closing valve 210, first heating device 300, first heating coil 310, first switch device 320, liquid filling and discharge device 330, temperature regulating device 400, circulating liquid guiding device 410, liquid discharge device 420, gas transmission device 430, second heating device 500, second heating coil 510, second switch device 520, conveying pipe 600, feed port 610, discharge port 620, nozzle 621, first temperature sensor 700, second temperature sensor 800, control unit 900. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figures 1 to 3The figure shows a water-based paint filling preheating device disclosed in the present invention, comprising a tank body 100, a heat shield 200, a first heating device 300, a temperature regulating device 400, a second heating device 500, and a delivery pipe 600. The tank body 100 has a housing 110 formed therein. The heat shield 200 is disposed within the housing 110 and divides the housing 110 into an upper chamber 111 and a lower chamber 112, which are arranged vertically. Because the heat shield 200 provides thermal insulation, heat cannot be transferred between the upper chamber 111 and the lower chamber 112. The first heating device 300 is used to heat the upper chamber 111, raising the temperature within the upper chamber 111 to the temperature required by the process. The temperature regulating device is used to cool the upper chamber 111, lowering the temperature within the upper chamber 111 to the coagulation temperature of the water-based paint. The second heating device 500 is used to heat the lower chamber 112, raising the temperature within the lower chamber 112 to the temperature required by the process. A feed port 610 is provided at one end of the conveying pipe 600, and a discharge port 620 is provided at the other end. Both the feed port 610 and the discharge port 620 pass through the accommodating cavity 110 and extend out of the tank body 100. The middle part of the conveying pipe 600 is reciprocatedly penetrated by the upper chamber 111 and the lower chamber 112, that is, multiple sections of the middle part of the conveying pipe 600 are located in the upper chamber 111, and the remaining sections are located in the lower chamber 112.

[0028] In this embodiment, before spraying the water-based paint, the water-based paint stored in the sealed container is drained from the feed port 610 to the middle of the delivery pipe 600. At this time, the second heating device 500 is always kept in the started state, so that the delivery pipe 600 portion located in the lower chamber 112 is heated, and the water-based paint in the delivery pipe 600 portion is preheated, and the delivery pipe 600 portion located in the upper chamber 111 solidifies under the cooling action of the temperature regulating device 400, so that the solidified water-based paint in the delivery pipe 600 portion blocks the transmission of the water-based paint in the delivery pipe 600, thereby avoiding the oxygen in the air at the discharge port 620 from contacting the water-based paint in the delivery pipe 600, thereby reducing the amount of water-based paint in the delivery pipe 600 that reacts with oxygen. When spraying the water-based paint, the temperature regulating device 400 is closed, and the portion of the delivery pipe 600 located in the upper chamber 111 melts under the heating effect of the first heating device 300. At this time, the water-based paint stored in the sealed container is drained from the feed port 610 to the middle of the delivery pipe 600 and ejected from the discharge port 620. When the water-based paint stops spraying, the discharge port 620 and the first heating device 300 are closed, and the temperature regulating device 400 is reopened. The portion of the delivery pipe 600 located in the upper chamber 111 re-solidifies under the cooling effect of the temperature regulating device 400, preventing oxygen in the air from entering through the discharge port 620 and contacting the water-based paint in the delivery pipe 600, thereby preventing an oxidation reaction.

[0029] In some embodiments of the present invention, Figure 1 As shown, the tank body 100 is provided with a heating chamber 120, which is located on the side wall of the upper chamber 111 and is filled with a heat-conducting medium, such as thermal oil. The first heating device 300 includes a first heating coil 310, a first switch device 320, and a liquid filling and draining device 330. The liquid filling and draining device 330 is connected to the heating chamber 120, and the first heating coil 310 is located in the heating chamber 120. Before spraying the water-based paint, the temperature adjustment device 400 is turned on. When spraying the water-based paint, the temperature adjustment device 400 is turned off, and the first switch device 320 is closed, so that the external power supply is electrically connected to the first heating coil 310. The first heating coil 310 heats up due to the Joule heating effect, and the delivery pipe 600 located in the upper chamber 111 is partially melted by the heating effect of the first heating coil 310. The heat-conducting medium has a good heat-conducting effect and evenly transfers the heat generated by the first heating coil 310 to the delivery pipe 600. After spraying the water-based paint, the filling and draining device 330 discharges the heat transfer oil from the heating chamber 120 and stores it, and then the temperature adjustment device 400 is reopened. When the upper chamber 111 needs to be heated later, the filling and draining device 330 refills the previous heat transfer medium into the heating chamber 120.

[0030] In some embodiments of the present invention, Figure 1 As shown, the upper chamber 111 is filled with coolant, and the temperature regulating device 400 includes a circulating liquid guide device 410, a drain device 420, and a gas transmission device 430. The circulating liquid guide device 410 is connected to the upper chamber 111. Before spraying the water-based paint and after spraying the water-based paint, the circulating liquid guide device 410 circulates the coolant into the upper chamber 111, and the coolant solidifies the water-based paint in the delivery pipe portion located in the upper chamber 111. When spraying the water-based paint, the circulating liquid guide device 410 is closed. At this time, the circulating liquid guide device 410 does not circulate the coolant into the upper chamber 111. At this time, the drain device 420 discharges the coolant in the upper chamber 111. After that, the first heating device 300 and the gas transmission device 430 work together. The gas transmission device 430 introduces a heat-insulating gas, such as carbon dioxide, into the upper chamber 111. The good thermal conductivity of carbon dioxide rapidly heats the delivery pipe portion located in the upper chamber 111.

[0031] In some embodiments of the present invention, Figure 1As shown, the lower chamber 112 is filled with a heat-conducting medium, such as heat-conducting oil, and the second heating device 500 includes a second heating coil 510 and a second switch device 520. The second heating coil 510 is arranged in the lower chamber 112. Before and after spraying the water-based paint, the second switch device 520 is always kept in the open state. The closed second switch device 520 electrically connects the external power supply to the second heating coil 510. Under the action of the Joule heating effect, the second heating coil 510 heats up, and the part of the delivery pipe 600 located in the lower chamber 112 is heated by the heating effect of the second heating coil 510. The heat-conducting medium plays a good heat-conducting role and evenly transfers the heat generated by the second heating coil 510 to the delivery pipe 600.

[0032] In some embodiments of the present invention, the solidified water-based paint in the delivery pipe portion located in the upper chamber 111 and the hot water-based paint in the delivery pipe portion located in the lower chamber 112 interact with each other, so that the solidified water-based paint cannot block the flow of the hot water-based paint, such as Figure 2 As shown, an on-off valve 210 is provided on the heat insulation board 200, and the delivery pipe 600 located in the upper chamber 111 is connected to the delivery pipe located in the lower chamber 112 through the on-off valve 210. Specifically, when the water-based paint is sprayed, the on-off valve 210 is opened to ensure that the water-based paint can flow throughout the delivery pipe 600 and be ejected from the discharge port 620; when the water-based paint stops spraying, the on-off valve 210 is closed, allowing the water-based paint in the delivery pipe portion located in the upper chamber 111 to solidify under the action of the temperature adjustment device 400.

[0033] In some embodiments of the present invention, in order to improve the heating effect of the first heating device 300 on the delivery pipe 600 located in the upper chamber 111, and to improve the cooling effect of the temperature regulating device 400 on the delivery pipe 600 located in the upper chamber 111, as shown in FIG. Figure 2 As shown, the delivery pipe 600 in the upper chamber 111 is spirally shaped to increase the contact area between the delivery pipe 600 and the coolant, thereby improving heat transfer. Similarly, to enhance the heating effect of the second heating device 500 on the delivery pipe 600 in the lower chamber 112, the delivery pipe 600 in the lower chamber 112 is also spirally shaped.

[0034] In some embodiments of the present invention, in order to reduce the amount of air entering the delivery pipe 600 from the discharge port 620, and when the water-based paint is not sprayed, the discharge port 620 can be closed, such as Figure 1 As shown, at least one nozzle 621 that can be opened and closed is provided at the discharge port 620 , and one end of the nozzle 621 is connected to the conveying pipe 600 .

[0035] In some embodiments of the present invention, in order to further reduce the amount of air entering the delivery pipe 600 from the discharge port 620, as shown in FIG. Figure 3 As shown, the end of the nozzle 621 connected to the delivery pipe 600 is tapered, and the small end is close to the nozzle 621. In this way, the pressure of the water-based paint sprayed from the nozzle 621 is greater than the pressure in the delivery pipe 600, and the oxygen in the air is not easy to enter the delivery pipe 600 from the open nozzle 621. When the water-based paint is not sprayed, the nozzle 621 can be directly closed.

[0036] In some embodiments of the present invention, since the nozzle 621 is in the outside air, it is easily affected by the ambient temperature. Even when the ambient temperature is low, the water-based paint in the nozzle 621 may solidify and block the nozzle 621, making it impossible to spray the water-based paint. To this end, a third heating device (not shown in the drawings) is provided in the nozzle 621. Optionally, the third heating device can be a powered coil, which is wound around the housing of the nozzle 621. For example, in order to prevent safety accidents, the powered coil can be set in the inner cavity of the nozzle 621, so that the nozzle 621 can maintain the temperature required by the process during the spraying operation to prevent the water-based paint in the nozzle 621 from solidifying.

[0037] In some embodiments of the present invention, Figure 4 As shown, the water-based paint filling preheating device also includes a first temperature sensor 700, a second temperature sensor 800, and a control unit 900. The first temperature sensor 700 is provided in the upper chamber 111 for detecting the temperature in the upper chamber 111. The second temperature sensor 900 is provided in the lower chamber 112 for detecting the temperature in the lower chamber 112. The control unit 900 is electrically connected to the first heating device 300, the temperature regulating device 400, the second heating device 500, the first temperature sensor 700, and the second temperature sensor 800. When in use, the control unit 900 receives the temperature data collected by the first temperature sensor 700 in real time, and then accurately controls the temperature in the upper chamber 111 through the operating status of the first heating device 300 and the temperature regulating device 400 in real time according to the temperature in the upper chamber 111. Similarly, the control unit 900 receives the temperature data collected by the second temperature sensor 800 in real time, and then accurately controls the temperature in the lower chamber 112 through the operating status of the second heating device 500 in real time according to the temperature in the lower chamber 112.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A water-based paint filling and preheating device, characterized in that: The water-based paint filling and preheating device comprises: The tank body has a receiving cavity; a heat insulation plate disposed in the accommodating cavity to separate the accommodating cavity into an upper chamber and a lower chamber disposed vertically; a first heating device, configured to heat the upper chamber; a temperature regulating device for cooling the upper chamber; a second heating device for heating the lower chamber; A delivery pipe having a feed port and a discharge port, wherein both the feed port and the discharge port pass through the accommodating cavity and extend out of the tank body, and a middle portion of the delivery pipe reciprocates through the upper chamber and the lower chamber; Among them, the second heating device remains in the started state. When the water-based paint is sprayed, the feed port, the discharge port and the first heating device are started, and the temperature adjustment device is turned off; when the water-based paint stops spraying, the discharge port and the first heating device are closed, and the temperature adjustment device is turned on.

2. The water-based paint filling and preheating device according to claim 1, characterized in that: The tank body is provided with a heating cavity, which is located on the side wall of the upper chamber and is filled with a heat-conducting medium; The first heating device includes a first heating coil, a first switch device, and a liquid filling and discharging device. The first heating coil is arranged in the heating chamber. The first switch device is used to switch the current on the first heating coil. The liquid filling and discharging device is in communication with the heating chamber. When the water-based paint is sprayed, the first switch device is closed; when the water-based paint stops spraying, the first switch device is disconnected, and the filling and discharging device discharges the heat-conducting medium in the heating chamber.

3. The water-based paint filling and preheating device according to claim 2, characterized in that: The upper chamber is filled with cooling liquid, and the temperature regulating device comprises: a circulating liquid guiding device, connected to the upper chamber, for circulating cooling liquid into the upper chamber; a liquid discharge device, connected to the upper chamber and used for discharging the coolant into the upper chamber; a gas transmission device, connected to the upper chamber, for introducing heat-insulating gas into the upper chamber; Among them, when the water-based paint is sprayed, the drainage device and the gas transmission device are started; when the water-based paint stops spraying, the drainage device and the gas transmission device are closed, and the circulating liquid guide device is started.

4. The water-based paint filling and preheating device according to claim 1, characterized in that: The lower chamber is filled with a heat-conducting medium; The second heating device includes a second heating coil and a second switch device, the second heating coil is arranged in the lower chamber, and the second switch device is used to switch the current on the second heating coil; Wherein, the second switching device remains in a closed state.

5. The water-based paint filling and preheating device according to any one of claims 1 to 4, characterized in that: An opening and closing valve is provided on the heat insulation plate, and the delivery pipe located in the upper chamber and the delivery pipe located in the lower chamber are connected together through the opening and closing valve; When the water-based paint is sprayed, the on-off valve is opened; when the water-based paint stops spraying, the on-off valve is closed.

6. The water-based paint filling and preheating device according to any one of claims 1 to 4, characterized in that: The delivery pipe located in the upper chamber and the delivery pipe located in the lower chamber are both spiral-shaped.

7. The water-based paint filling and preheating device according to claim 1, characterized in that: At least one nozzle that can be opened and closed is provided at the discharge port, and one end of the nozzle is connected to the conveying pipe.

8. The water-based paint filling and preheating device according to claim 7, characterized in that: One end of the nozzle communicating with the delivery pipe is tapered, and the small end is close to the nozzle.

9. The water-based paint filling and preheating device according to claim 8, characterized in that: The nozzle is provided with a third heating device for heating the nozzle.

10. The water-based paint filling and preheating device according to any one of claims 1 to 4 and 7 to 9, characterized in that: The water-based paint filling and preheating device also includes: a first temperature sensor, disposed in the upper chamber, for detecting the temperature in the upper chamber; a second temperature sensor, disposed in the lower chamber, for detecting the temperature in the lower chamber; a control unit electrically connected to the first heating device, the temperature regulating device, the second heating device, the first temperature sensor, and the second temperature sensor, and configured to control the operating states of the first heating device and the temperature regulating device according to temperature data collected by the first temperature sensor, and Used to control the operating state of the second heating device according to the temperature data collected by the second temperature sensor.

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