Spraying device

Abstract

According to the spraying device, a coating trolley is provided with a circular-tube-shaped center rod, two circular-tube-shaped lateral rods are fixed to the two sides of the center rod, the center rod and the lateral rods are fixed through spraying rod fixing blocks, the two ends of each lateral rod are each provided with a spraying rod fixing block, bottom trundles are fixed to the two sides of each spraying rod fixing block, and the bottom trundles are vertically arranged. A lateral wheel support is arranged at the position close to the fixing block, the lateral wheel support is provided with a block-shaped body and a center rod, the lateral rod is inserted into the body of the lateral wheel support to be fixed, and side face supporting wheels are arranged on the two sides of the body of the lateral wheel support and horizontally arranged. A material pipe connector is fixed to the bottom of the lateral rod, the top of the lateral rod is bent outwards and connected with a side face nozzle, the top end of the center rod is connected with a spraying rod through a spraying rod butt joint, a filter is arranged in the spraying rod butt joint, and a mist nozzle is movably connected to the end of the spraying rod. According to the invention, spraying and atomization can be simultaneously carried out in a narrow space, secondary operation is reduced, and the spraying period is shortened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ship gas drag reduction, and particularly relates to a spraying device. BACKGROUND

[0002] The ship gas drag reduction technology is a technology for reducing the surface frictional resistance of a ship by introducing air into the bottom of the ship during the running of the ship to form a stable gas lubricating layer. The ship gas layer drag reduction system comprises a gas supply system, a pressure stabilizing chamber and a gas jetting hole. The gas jetting hole is arranged on the ship bottom plate and is in communication with the pressure stabilizing chamber. When the ship is running, the gas supply system supplies gas into the pressure stabilizing chamber, and the gas in the pressure stabilizing chamber is jetted out to the outside of the ship body through the gas jetting hole to form a gas lubricating layer on the bottom of the ship body, which can reduce the resistance.

[0003] In order to ensure stable pressure output, a semicircular or square pressure stabilizing chamber is usually welded on the ship bottom plate. When the ship is at a wharf or encounters severe sea conditions during navigation, the ship gas layer drag reduction system is closed, at this time, seawater enters the inside of the pressure stabilizing chamber from the gas jetting hole and carries marine organisms into the pressure stabilizing chamber. Since seawater is corrosive, it will corrode the ship steel plate and the pressure stabilizing chamber. If it is soaked in seawater for a long time, it will cause the pressure stabilizing chamber and the ship bottom plate to corrode and crack, thereby affecting the structural safety of the ship.

[0004] The pressure stabilizing chamber is a Φ168*20.0 semicircular pipe, which directly contacts seawater inside. Although a special steel pipe containing 1% chromium is used for the semicircular pipe of the pressure stabilizing chamber, in order to further protect the semicircular pipe of the pressure stabilizing chamber and the thickened outer plate, the inside of the pressure stabilizing chamber still needs to be coated. The space inside the pressure stabilizing chamber is small, and it is welded on the thickened outer plate, so it cannot use conventional phosphating, galvanizing and other treatment methods. Due to the small space, personnel cannot enter, so special sandblasting and coating equipment is needed when sandblasting and coating the inside of the pressure stabilizing chamber. According to the characteristics of the pressure stabilizing chamber, sandblasting and coating equipment is designed for sandblasting and coating. SUMMARY

[0005] To solve the above problems, the application provides a pressure stabilizing chamber unit installation method, which aims to shorten the overall construction period to the greatest extent and improve the construction quality. The technical scheme adopted by the application is as follows:

[0006] A spraying device, the coating trolley has a round pipe shaped center rod, two round pipe shaped lateral rods are fixed on both sides of the center rod, the center rod and the lateral rods are fixed through a spray rod fixing block, one spray rod fixing block is arranged at each end of the lateral rod, bottom casters are fixed on both sides of the spray rod fixing block, and the bottom casters are vertically arranged.

[0007] The lateral wheel support is provided with a block-shaped main body, the center rod and the lateral rod are inserted into the main body of the lateral wheel support and fixed, and side support wheels are arranged on both sides of the main body of the lateral wheel support and arranged horizontally.

[0008] The bottom of the lateral rod is fixed with a pipe joint, the top of the lateral rod is outwardly bent at an angle of 15°-30°, and a side nozzle is connected to the top of the lateral rod, the top end of the center rod is connected with a spray rod through a spray rod adapter, a filter is arranged in the spray rod adapter, and a mist nozzle is movably connected to the end of the spray rod.

[0009] After the strength test of the pressure stabilization cavity unit is completed, the sand blasting and coating trolley enters from the open end of the pressure stabilization cavity to perform sand blasting and coating on the inside of the pressure stabilization cavity, and a brush is used for coating in the air injection hole of the pressure stabilization cavity.

[0010] The multiple pressure stabilization cavity units are folded to form an integral pressure stabilization cavity, the sealing box at the end of the pressure stabilization cavity is opened, the coating trolley enters from the sealing box to perform supplementary coating on the inside of the pressure stabilization cavity, and the watertight manhole cover is fastened with the sealing box after the supplementary coating.

[0011] The spraying device has the characteristics that the center rod and the lateral rod pass through the spray rod fixing block and are fixed with the spray rod fixing block through bolts.

[0012] The spraying device has the characteristics that the diameter of the spray rod is smaller than the diameter of the center rod, and the length of the spray rod is 0.15-0.2 times the length of the center rod.

[0013] The spraying device has the characteristics that the lateral rod is bent upwards at a length of 4 / 5 from the bottom.

[0014] The spraying device has the characteristics that the top of the spray rod fixing block is arc-shaped, and the bottom is horizontal.

[0015] The spraying device has the characteristics that the side support wheels are located on the same horizontal plane as the center rod and the lateral rod.

[0016] The present application solves the problem of spraying in a narrow space and is a key equipment in the gas layer reduction system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the pressure stabilization cavity coating trolley;

[0018] Figure 2 is a structural schematic view of the sealing boxes at the two ends of the pressure stabilization cavity;

[0019] Wherein, 1 - material pipe joint, 2 - spray rod fixed block, 3 - lateral wheel support, 4 - bottom caster, 5 - side support wheel, 6 - side nozzle, 7 - spray rod butt joint, 8 - spray rod, 9 - fog nozzle, 10 - center rod, 11 - lateral rod. DETAILED DESCRIPTION

[0020] The application is further illustrated in conjunction with the drawings.

[0021] As Figure 1 A kind of stable pressure chamber coating trolley shown in the drawing, with 1 center rod 10, center rod front end is provided with spray rod butt joint 7, spray rod 8 and four periphery atomizing nozzle 9, center rod rear section is connected with spray equipment compressor, front end four periphery atomizing nozzle 9 can be removed and replaced, spray rod butt joint 7 is built-in filter.Spray rod 8 is not too long, its diameter is less than center rod 10, its length is 0.15~0.2 times of the length of center rod, to avoid the quality of front end too large, the situation of joint 7 ground contact occurs.Four periphery atomizing nozzle 9 is four periphery spray nozzle, can be in stable pressure chamber 360 ° spray gas to facilitate subsequent paint adhesion.

[0022] Spray device has 2 lateral rods 11, lateral rod front end 1 / 5 is provided with bending, lateral rod front end is provided with side nozzle 6, bending angle is about 15 °~30 °, the reason for bending is to make contact greater when spraying paint to the inside of stable pressure chamber, the maximum width of bending is not more than the maximum width of lateral wheel, the greater the angle, the better.Rear end is provided with material pipe joint 1, sleeve pipe joint 1 is built-in filter and is connected with spray equipment.

[0023] Since sand blasting device needs to slide in stable pressure chamber, two spray rod fixed blocks 2 are provided, fixed block 2 is profiled as upper arc and lower rectangle structure, wheels 4 are arranged on the left side and right side of lower rectangle structure, which can move forward in stable pressure chamber.Center rod and lateral rod are installed in the middle of arc block and rectangle block, and are fixed by screw and can be removed.One of fixed blocks is arranged at the last end of entire spray device, and the other fixed block is arranged in the middle of entire spray device, which is to move the center of gravity of spray device backward to avoid the situation that the weight of front end is too large and fog nozzle touches the ground.

[0024] Lateral wheel support 3 is arranged in front of spray rod fixed block 2, support 3 is in convex type, which helps to fix center rod and lateral rod, and side support wheel is arranged on the side, which walks on the inner wall of stable pressure chamber to ensure that the walking direction of entire trolley is not deviated.

[0025] The maximum width of lateral wheel support 3 is less than the width of inner wall of stable pressure chamber.

[0026] The maximum width of spray rod fixed block 2 is not more than the maximum width of lateral wheel support 3.

[0027] DETAILED DESCRIPTION

[0028] The internal coating of the pressure stabilizing chamber is carried out in two stages. After the strength test of the pressure stabilizing chamber unit is completed, the sandblasting and coating carriage enters from the open end of the pressure stabilizing chamber to sandblast and coat the inside of the pressure stabilizing chamber unit. A brush is used to coat the inside of the air jet holes. After the pressure stabilizing chamber is fully connected during the closing stage, the area of ​​the closing adjustment pipe needs to be touched up with coating, such as... Figure 2 As shown, open the sealing boxes at both ends of the pressure stabilizing chamber, put the painting trolley in for touch-up painting, and then put the watertight manhole cover on the dead sealing box back on.

Claims

1. A spraying device, characterized in that, The painting trolley has a cylindrical center rod (10), and two cylindrical side rods (11) are fixed on both sides of the center rod. The two side rods are symmetrically fixed on both sides of the center rod. The center rod and the side rods are fixed by spray bar fixing blocks (2). A spray bar fixing block is set at each end of the side rod. Bottom casters (4) are fixed on both sides of the spray bar fixing blocks. The bottom casters are set vertically. A lateral wheel bracket (3) is provided near the fixed block. The lateral wheel bracket has a block-shaped main body. The central rod and the lateral rod are inserted into the main body of the lateral wheel bracket and fixed. Side support wheels (5) are provided on both sides of the main body of the lateral wheel bracket. The side support wheels are set horizontally. A material pipe connector (1) is fixed at the bottom of the side rod. The top of the side rod is bent outward at an angle of 15° to 30° and is connected to a side nozzle (6). The top of the center rod is connected to the spray rod (8) through a spray rod connector (7). A filter is installed inside the spray rod connector. A mist nozzle (9) is movably connected to the end of the spray rod.

2. The spraying device according to claim 1, characterized in that, The center rod and side rods pass through the spray bar fixing block and are fixed to the spray bar fixing block by bolts.

3. The spraying device according to claim 1, characterized in that, The diameter of the spray bar is smaller than the diameter of the center bar, and the length of the spray bar is 0.15 to 0.2 times the length of the center bar.

4. The spraying device according to claim 1, characterized in that, The lateral bar bends upwards from the bottom, starting at 4 / 5 of its length.

5. A spraying device according to claim 1, characterized in that, The top of the spray bar fixing block is arc-shaped, and the bottom is horizontal.

6. A spraying apparatus according to claim 1, characterized in that, The side support wheels, center rod, and side rods are located on the same horizontal plane.

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