CN114653556B - A new torrent hot water washing process and multi-functional tank body for pre-painting treatment - Google Patents

Abstract

The invention relates to a new type of torrent hot water washing process for pre-painting and a multifunctional tank body, including a pre-degreasing station, a torrent degreasing station, and a second degreasing station. The pre-degreasing station includes a pre-degreasing tank. , The bottom of the pre-degreasing tank is also connected to a recovery circulation pipe, and the other end of the recovery circulation pipe is located on the upper side of the second degreasing tank. It solves the problem that the iron powder welding slag of the body-in-white is difficult to clean, and also solves the problem that the cold-rolled sheet is prone to rust. The three tanks are connected in series through the recovery circulation pipe to form a complete cycle, so that the tank liquid parameters of the three stations are consistent, and the degreasing liquid is saved for recycling.

Description

A new flood hot water washing process and multi-functional tank body for pre-painting treatment

technical field

The invention relates to the technical field of automobile painting, in particular to a new torrent hot water washing process and a multi-functional tank body for pre-painting treatment.

Background technique

At present, the main process of pre-treatment and cleaning in the painting workshop of domestic mainstream automobile factories is: flood hot water washing (spraying) + pre-degreasing (spraying) + degreasing (dipping). Torrent hot water washing is mainly responsible for slag removal, pre-degreasing + degreasing is mainly responsible for oil removal, taking into account the function of continuous slag removal, torrent hot water washing and degreasing are independent processes in terms of technology.

The pre-treatment torrent hot water washing station is responsible for the removal of more than 80% of the iron powder and welding slag of the welded body. The principle of flood hot water washing process: when the car body is in the uphill and downhill section, the outer surface and inner floor of the car body are washed with a large flow. By tilting the car body, the iron powder welding slag is brought out with the flowing water, which plays a role in cleaning the car body. Large-flow flushing acts on the inner and outer surfaces of the car body, and the iron powder welding slag is discharged with the water flow after flushing. The large flow medium is generally industrial water, add a small amount of degreasing liquid (to inhibit the corrosion of body panels).

To sum up, this process has the following defects: 1. The hot water washing with torrent mainly removes the iron powder welding slag through large-flow mechanical washing, but in the actual process, most of the iron powder welding slag of the body-in-white is wrapped in the plate oil. Due to the strong adhesion of the oil, mechanical washing cannot completely remove the iron powder welding slag. 3. Some OEMs add a small amount of degreasing agent to the hot water washing in the torrent (it cannot remove oil, but only to inhibit the corrosion of the iron plate), and the hot water washing is discharged every week, resulting in waste of the degreasing agent.

Therefore, there is a need for a new torrent hot water washing process and a multifunctional tank body for pre-painting treatment to solve the above technical problems.

Contents of the invention

Aiming at the technical problems existing in the prior art, the present invention provides a new torrent hot water washing process and a multifunctional tank body for pre-painting treatment.

The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a new torrent hot water washing process for pre-painting and a multifunctional tank body, including a pre-degreasing station, a torrent degreasing station, and two degreasing stations. The through valve is connected with a second spray pipe, the liquid inlet of one branch pipe is located at the bottom of the torrent degreasing tank, and the liquid inlet of the other branch pipe is located at the top of the torrent degreasing tank; the second degreasing station includes a second degreasing tank, and the height of the overflow liquid at the top of the pre-degreasing tank, the flooding degreasing tank, and the second degreasing tank increases sequentially, and is suitable for flowing into the flooding degreasing tank when the liquid in the second degreasing tank overflows, and flows into the pre-degreasing tank when the liquid in the flooding degreasing tank overflows. A recycling pipe is also connected, and the other end of the recycling pipe is located on the upper side of the second degreasing tank;

The new torrent hot water washing process for pre-painting treatment includes the following steps,

S1: The body-in-white enters the pre-degreasing station, sprays the surface of the body and the inner panel with the degreasing liquid, initially completes the degreasing and deslagging of the outer plate, and at the same time raises the temperature of the body to 50°C to achieve the best degreasing activity, and the sprayed degreasing liquid flows into the pre-degreasing tank;

S2: After preliminary degreasing, the iron powder welding slag adhering to the oil loses its adhesion and enters the torrent degreasing station. It is washed through multiple sets of pipelines. Under the action of mechanical washing and secondary emulsification, the iron powder welding slag that has lost its adhesion is brought out with the degreasing liquid in the up and down slopes of the torrent degreasing tank;

S3: The body-in-white enters the second degreasing station and soaks in the second degreasing tank to complete the degreasing of invisible parts such as the clamping cavity.

Further, an oil-water separator is installed on the recovery circulation pipe.

Further, a liquid replenishment pipe is connected to the output pipe, the other end of the liquid replenishment pipe is located on the upper side of the pre-degreasing tank, a solenoid valve is installed on the liquid replenishing pipe, and a liquid level sensor is installed at the bottom of the torrent degreasing tank.

Further, the output pipe is connected with a plurality of stirring nozzles, and the outlets of the plurality of stirring nozzles are respectively located at the bottom and the side of the torrent degreasing tank.

Further, multiple spray branch pipes are connected to the second spray pipe.

Further, the cross-sections of the torrent degreasing tank and the second degreasing tank are both inverted trapezoidal shapes.

The beneficial effect of the present invention is: by using the degreasing liquid to carry out torrent hot water washing, the amount of oil on the body-in-white is reduced, the problem that the iron powder welding slag of the body-in-white is difficult to clean is solved, and the problem that the cold-rolled sheet is easily corroded is also solved. The three tanks are connected in series through the recovery circulation pipe to form a complete cycle, so that the tank liquid parameters of the three stations are consistent and can be recycled, saving the degreasing liquid.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Pre-degreasing tank, 2. Torrent degreasing tank, 3. Second degreasing tank, 4. Auxiliary tank, 5. Liquid replenishment pipe, 6. First spray pipe, 7. Output pipe, 8. Solenoid valve, 9. Oil-water separator, 10. Second spray pipe, 11. Stirring nozzle, 12. Liquid level sensor, 13. Recovery circulation pipe.

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figure 1, a new torrent hot water washing process for pre-painting treatment and a multi-functional tank body, including three stations: pre-degreasing station, torrent degreasing station, and second degreasing station.

The pre-degreasing station includes a pre-degreasing tank 1. The bottom of the pre-degreasing tank 1 is connected with a first spray pipe 6. The first spraying pipe 6 is connected with multiple groups of spray flushing pipes for spraying and cleaning when the vehicle body enters the pre-degreasing station. The spraying pipe 6 is connected with a hydraulic pump.

The torrent degreasing station includes a torrent degreasing tank 2, the bottom of the torrent degreasing tank 2 is connected with an output pipe 7, and a filter screen is arranged at the entrance of the output pipe 7 at the bottom of the tank body (to ensure that the suction port is effectively filtered). The outlet pipe 7 is connected with a torrent washing spray pipe into the tank. A plurality of stirring nozzles 11 are also connected to the output pipe 7 , and the outlets of the plurality of stirring nozzles 11 are respectively located at the bottom and the side of the torrent degreasing tank 2 . The torrent degreasing tank 2 is also connected with two branch pipes, and the two branch pipes are connected to the second spray pipe 10 through a three-way valve. The liquid inlet of one branch pipe is located at the bottom of the torrent degreasing tank 2, and the top of the torrent degreasing tank 2 is provided with an auxiliary tank 4. The second spray pipe 10 is connected with a plurality of spray branch pipes, which are respectively the top spray nozzle in the middle, the side spray nozzle in the middle, the torrent washing nozzle in the outlet, the moisturizing spray nozzle, the large flow washing nozzle, the top spray nozzle in the groove, the side spray nozzle in the groove, the top spray nozzle in the outlet, and the side spray nozzle in the outlet. The torrent washing nozzles in the tank, the large flow washing nozzles, the top spray nozzles in the tank, the side spray nozzles in the tank, and the large flow washing nozzles are used to clean the car body when it enters the flood degreasing tank 2 and is located on the slope of the tank body. The top spray nozzle in the middle and the side spray nozzle in the middle are used for cleaning when the vehicle body is at the bottom of the tank. The outlet torrent washing nozzle, the outlet side spray nozzle, and the outlet top spray nozzle are used for flushing when the body is on the right slope when it is out of the groove. The output pipe 7 is connected with a liquid replenishment pipe 5, and the other end of the liquid replenishment pipe 5 is located on the upper side of the pre-degreasing tank 1. A solenoid valve 8 is installed on the liquid replenishing pipe 5. A liquid level sensor 12 is arranged at the bottom of the torrent degreasing tank 2. The on-off of the solenoid valve 8 is controlled by the liquid level sensor 12. When the liquid level at the bottom of the torrent degreasing tank 2 is low, the solenoid valve 8 is closed, and the delivery of degreasing liquid to the pre-degreasing tank 1 is stopped, which can protect the hydraulic pump. In order to ensure the balance of the original tank liquid, the liquid replenishment in the pre-degreasing tank 1 through the liquid replenishment pipe 5 can maintain the balance of the tank liquid.

In addition, if the oil used by the body-in-white exceeds the degreasing capacity of the above-mentioned equipment, the torrent degreasing tank 2 can be turned into a full immersion tank by switching the three-way valve (that is, the liquid level of the degreasing liquid in the torrent degreasing tank 2 is increased). Circulating flow is conducive to internal stirring.

The second degreasing station includes a second degreasing tank 3. The cross-section of the second degreasing tank 3 is in the shape of an inverted trapezoid. The height of the overflow liquid at the top of the pre-degreasing tank 1, the torrent degreasing tank 2, and the second degreasing tank 3 increases sequentially. On the upper side of the second degreasing tank 3, the three tanks are connected in series through the recovery circulation pipe 13 to form a complete cycle, so that the tank liquid parameters of the three stations are consistent and can be recycled. The oil-water separator 9 is installed on the recovery circulation pipe 13, and the reciprocating use is realized through the reverse overflow and the oil-water separator.

The new torrent hot water washing process for pre-painting treatment includes the following steps,

S1: The body-in-white enters the pre-degreasing station, sprays the surface of the body and the inner panel with the degreasing liquid, initially completes the degreasing and deslagging of the outer plate, and at the same time raises the temperature of the body to 50°C to achieve the best degreasing activity, and the sprayed degreasing liquid flows into the pre-degreasing tank 1;

S2: After the initial degreasing of the body-in-white, the iron powder welding slag adhering to the oil loses its adhesion and enters the flood degreasing station, where it is washed through multiple sets of pipelines. Under the action of mechanical washing and secondary emulsification, the iron powder welding slag that has lost its adhesion is brought out with the degreasing liquid in the uphill and downhill sections of the flood degreasing tank 2;

S3: The body-in-white enters the second degreasing station, soaks in the second degreasing tank 3, and completes the degreasing of invisible parts such as the clamping cavity.

Through the introduction of new equipment, the application of new technology is realized: the particles on the outer surface of the car body are significantly reduced, and the number of electrophoretic particle polishing of a single vehicle is reduced, which provides a strong guarantee for the reduction of the index of electrophoretic polishing DPU; the cost of degreasing liquid is saved; at the same time, the variable function of the new equipment provides optional functions for the adaptability of subsequent models.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", 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 referred device or element must have a specific orientation, and a specific orientation configuration and operation, therefore, it should not be construed as a limitation of the present invention. In addition, "first" and "second" are for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be an internal connection between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (5)

1. A novel flood hot water washing process for coating pretreatment is characterized in that: the device comprises a pre-degreasing station, a flood degreasing station and a degreasing station, wherein the pre-degreasing station comprises a pre-degreasing tank (1), and the bottom of the pre-degreasing tank (1) is connected with a first spray pipe (6); the flood degreasing station comprises a flood degreasing tank (2), an output pipe (7) is connected to the bottom of the flood degreasing tank (2), two branch pipes are connected to the flood degreasing tank (2), the two branch pipes are connected with a second spray pipe (10) through a three-way valve, a liquid inlet of one branch pipe is positioned at the bottom of the flood degreasing tank (2), an auxiliary tank (4) is arranged at the top of the flood degreasing tank (2), and a liquid inlet of the other branch pipe is positioned at the top of the flood degreasing tank (2) and connected with the auxiliary tank (4); the two degreasing stations comprise a second degreasing tank (3), the top overflow liquid level heights of the pre-degreasing tank (1), the flood degreasing tank (2) and the second degreasing tank (3) are sequentially increased, the liquid in the second degreasing tank (3) flows into the flood degreasing tank (2) when overflows, the liquid in the flood degreasing tank (2) flows into the pre-degreasing tank (1) when overflows, the bottom of the pre-degreasing tank (1) is further connected with a recycling circulating pipe (13), and the other end of the recycling circulating pipe (13) is positioned on the upper side of the second degreasing tank (3); the second spray pipe (10) is connected with a plurality of spray sub-pipes, which are respectively a middle top spray pipe, a middle side spray pipe, a groove outlet flood wash pipe, a moisturizing spray pipe, a high-flow wash pipe, a groove inlet top spray pipe, a groove inlet side spray pipe, a groove outlet top spray pipe and a groove outlet side spray pipe;

the novel flood hot water washing process for the pretreatment of the coating comprises the following steps,

s1: the white automobile body enters a pre-degreasing station, degreasing and slag removal of an outer plate are primarily finished by spraying degreasing liquid on the surface and the inner plate of the automobile body, the temperature of the automobile body is raised to 50 ℃, the degreasing activity is optimal, and the sprayed degreasing liquid flows into a pre-degreasing tank (1);

s2: the white car body is subjected to preliminary degreasing, the iron powder welding slag adhered in the oil loses adhesion, enters a flood degreasing station, is washed by a plurality of groups of pipelines, and is carried out along with degreasing liquid on the upper and lower slope sections of a flood degreasing tank (2) under the actions of mechanical washing and secondary emulsification reaction;

s3: the white car body enters a degreasing station II and is soaked in a second degreasing tank (3) to finish degreasing of invisible parts such as a clamping cavity and the like.

2. The novel flood hot water washing process for pretreatment of coating according to claim 1, wherein: the recovery circulating pipe (13) is provided with an oil-water separator (9).

3. The novel flood hot water washing process for pretreatment of coating according to claim 1, wherein: the liquid supplementing pipe (5) is connected to the output pipe (7), the other end of the liquid supplementing pipe (5) is located at the upper side of the pre-degreasing tank (1), the electromagnetic valve (8) is installed on the liquid supplementing pipe (5), and the liquid level sensor (12) is arranged at the bottom of the flood degreasing tank (2).

4. The novel flood hot water washing process for pretreatment of coating according to claim 1, wherein: the output pipe (7) is connected with a plurality of stirring spray pipes (11), and outlets of the stirring spray pipes (11) are respectively positioned at the bottom and the side part in the flood degreasing bath (2).

5. The novel flood hot water washing process for pretreatment of coating according to claim 1, wherein: the cross sections of the flood degreasing tank (2) and the second degreasing tank (3) are in inverted trapezoid shapes.