JPH02198657A - Coater of outer surface of pipe - Google Patents

Abstract

PURPOSE:To prevent dissipation of coating without lowering the sticking efficiency of coating for a coating object pipe by controlling the divergence of a first air quantity controller and a second air quantity controller and allowing the sucking force of an aspirator to properly act on both a spray booth and a pipe penetrating chamber. CONSTITUTION:Both pipe penetrating ports 4 for penetrating a coating object pipe 3 and a suction port 5 communicated with the outside are provided to a spray booth 1. Further coating guns 10 for injecting coating are opened toward the coating object pipe 3 which is penetrated into the spray booth 1 through the pipe penetrating ports 4. Furthermore a pipe penetrating chamber 7 which is provided while covering the circonference of the pipe 3 is communicated with the spray booth 1 via the pipe penetrating ports 4. Further one end of a first suction path 11 is communicated with the spray booth 1 and the other end is communicated with an aspirator 13 via a first air quantity controller 12. Furthermore one end of a second suction paths 14 is communicated with the chamber 7 and also the other end is communicated with the first suction pipe 11 via the second air quantity controllers 15.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a pipe exterior surface coating device.

Conventional technology Conventionally, to paint the outside of a pipe, a box-shaped booth forms a painting room, the pipe to be painted is inserted into the painting room through a tube insertion opening formed in the booth, and the paint is applied to the pipe in the painting room. It was done by spraying. There is a problem that the paint, which exists in the form of a mist without adhering to the pipe to be painted, scatters out of the painting room through the pipe insertion port and harms the working environment. Air was being blown to other places.

Problems to be Solved by the Invention However, according to the conventional configuration described above, when the suction force is increased in an attempt to prevent the paint from scattering, the paint sprayed toward the pipe to be painted is affected by the suction airflow, There was a problem that the adhesion efficiency of the paint to the pipe decreased.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pipe exterior coating device that can prevent paint from dissipating without reducing the adhesion efficiency of the paint to the pipe to be painted.

Means for Solving the Problems In order to solve the above problems, the present invention provides a painting chamber having a tube insertion port for inserting a tube to be painted and an intake port communicating with the outside, and a tube insertion port into the painting chamber. A painting gun that opens toward the pipe to be painted that is inserted through the opening and sprays paint, and a pipe insertion chamber that communicates with the painting room through the pipe insertion port and that covers the periphery of the pipe to be painted. a first air intake passage, one end of which communicates with the painting chamber and the other end of which communicates with the intake device via the first air volume regulator; one end of which communicates with the tube insertion chamber, and the other end of which communicates with the second air volume regulator. The second air intake passage communicates with the first air intake passage through the second air intake passage.

Further, the painting chamber has a tube insertion port for inserting the pipe to be painted and an intake port communicating with the outside, and an opening toward the pipe to be painted inserted through the tube insertion port into the painting chamber,
A painting gun that injects paint, a tube insertion chamber that communicates with the painting chamber through a tube insertion port and covers the periphery of the tube to be painted, and a negative end that communicates with the painting chamber through a first constriction part. and a second constriction part, one end of which communicates with the tube insertion chamber and the other end of which communicates with the downstream side of the first constriction part of the intake passage. The size of the flow path of the first constriction portion and the second constriction portion are formed at a predetermined ratio.

Effect With the above-mentioned configuration, the paint sprayed from the painting gun does not adhere to the pipe to be painted, but instead becomes atomized and floats in the air inside the painting room. It is sucked into the suction device through the air intake path. Also, some of the paint that is not sucked into the first intake path and flows into the tube insertion chamber from the tube insertion port is sucked into the first intake path through the second intake path, and is sucked into the suction device along with other paint. . Therefore, the paint can be prevented from dissipating to the outside without increasing the suction force of the suction device more than necessary, that is, to the extent that it inhibits the adhesion of the paint to the pipe to be painted.

Moreover, by adjusting the opening degrees of the first air volume regulator and the second air volume regulator, the suction force of the suction device acts appropriately on the painting chamber and the tube insertion chamber, and the flow of suction air in the painting chamber can be adjusted as desired. controlled by the state.

In addition, by setting the size of the flow path of the first constriction part and the second constriction part to a predetermined ratio, the suction force of the suction device of the -stand is applied separately to the painting chamber and the tube insertion chamber, and The flow state of the suction airflow in is fixedly set to an optimum state.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, a painting room 1 is formed of a box-shaped booth 2, and the booth 2 has a pair of first pipe insertion ports 4 through which a pipe 3 to be painted is inserted, and an intake port 5 communicating with the outside. An intake filter 6 is arranged at the intake port 5. Further, the booth 2 is provided with a tube insertion chamber 7 that communicates with the painting room 1 through each first tube insertion hole 4, and a second tube insertion hole 8 is formed in this tube insertion chamber 7. . and,
A pipe 3 to be painted is placed passing through the painting chamber 1 through a first pipe insertion port 4 and a second pipe insertion port 8, and this pipe 3 to be painted
A coating gun IO is provided inside the coating chamber 1 and is open toward the paint supply pipe 9 and communicates with the paint pressure feed pipe 9. and,
A first air intake passage 11 which communicates with the painting chamber 1 at one end is provided so as to communicate with an air intake device 13 at the other end via a first air volume regulator (2). Further, a second intake passage 14 communicating with the tube insertion chamber 7 at one end is provided to communicate with the first intake passage 11 downstream of the first air volume regulator 12 via the second air volume regulator I5. .

The effects of the above configuration will be explained below.

Painting is performed by spraying paint 16 from a paint gun IO while rotating a pipe 3 to be painted inserted into the booth 2 around its axis. At this time, the paint sprayed from the paint gun IO ■6
The paint 16 that does not adhere to the pipe 3 to be painted and becomes atomized and floats in the air inside the painting room 1 passes through the first air intake path 11 together with the outside air that flows into the painting room 1 from the intake port 5. It is sucked into the suction device 13. Further, some of the paint 16 that is not sucked into the first air intake path If and flows into the tube insertion chamber 7 from the first tube insertion port 4 is sucked into the first air intake path 11 through the second air intake path 14; is sucked into the suction device 13 together with the paint I6. Therefore, the suction force of the suction device 13 is increased more than necessary.
That is, the paint I6 is prevented from dissipating to the outside without increasing the paint 16 to the extent that it inhibits the adhesion of the paint 16 to the pipe 3 to be painted. Moreover, the first air volume regulator 12 and the second air volume regulator 15
By adjusting the opening degree of the suction device 13, the suction force of the suction device 13 acts appropriately on the coating chamber 1 and the tube insertion chamber 7, and the flow of suction air within the coating chamber 1 is controlled to an arbitrary state.

FIG. 2 shows another embodiment of the present invention, in which the painting room 21 is formed of a box-shaped booth 22.
A pair of first tube insertion ports 24 for inserting the tube to be painted 23 and an intake port 25 communicating with the outside are formed in the tube. Further, the booth 22 is provided with a tube insertion chamber 26 that communicates with the painting chamber 21 through each first tube insertion port 24, and a second tube insertion port 27 is formed in this tube insertion chamber 2B. . The pipe to be painted 23 is arranged to pass through the painting chamber 21 through the first pipe insertion port 24 and the second pipe insertion port 27, and is opened toward the pipe to be painted 23 and is connected to the paint pressure feeding pipe 28. A communicating painting gun 29 is provided to be inserted through the intake port 25. A first air intake passage 30 communicates with the bottom of the painting chamber 2I using an opening at one end as a first constriction part 31, and the other end of the first air intake passage 30 communicates with an intake device 32.

Further, a second intake passage 33 whose one end communicates with the tube insertion chamber 26 is coaxially inserted into the first intake passage 30, and the other end of this second intake passage 33 serves as a second constriction portion 34. The opening is located on the downstream side of the first throttle section 3 of the first intake passage 30. Further, the sizes of the flow paths A and B of the first constriction section 31 and the second constriction section 34 are formed to have a predetermined ratio.

In this configuration, a part of the paint 35 that is not drawn into the first air intake path 30 and flows into the tube insertion chamber 26 from the first tube insertion port 24 is sucked into the first air intake path 33 through the second air intake path 33. and is sucked into the suction device 32 together with other paint 35. At this time, the ratio of the suction force acting on the coating chamber 21 and the tube insertion chamber 26 is the flow path A of the first constriction section 31 and the second constriction section 34;
It is determined by the ratio of B. As a result, the suction force of the suction device 32 on the second side acts separately on the coating chamber 21 and the tube insertion chamber 26, and the flow state of the suction airflow in the coating chamber 21 is fixedly set to the optimum state. Ru.

Effects of the Invention As described above, according to the present invention, it is possible to prevent the paint from dissipating to the outside without increasing the suction force of the suction device to the extent that it inhibits the adhesion of the paint to the pipe to be painted. Moreover, by adjusting the opening degrees of the first air volume regulator and the second landscape regulator, the suction force of the bow suction device can act appropriately on the painting chamber and the tube insertion chamber, and the flow of suction air in the painting chamber can be controlled. Can be controlled to any state.

In addition, by setting the size of the flow path of the first constriction part and the second constriction part to a predetermined ratio, the suction force of the suction device of the second stage can be applied separately to the painting chamber and the tube insertion chamber, and The flow state of the suction airflow can be fixedly set to the optimum state.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIG. 2 is an overall configuration diagram showing another embodiment of the invention. 1.21...Painting room, 3,23...Pipe to be painted, 4
, 24...first tube insertion port, 5.25...intake port,'
7.2G...tube insertion chamber, 10.29...painting gun,
11.30...First intake path, I2...First air volume regulator, 13.32...Suction device, 14.33...Second
Intake path, 15... second air volume regulator, 31... first throttle section, 34... second throttle section.

Claims (1)

[Scope of Claims] 1. A painting chamber having a tube insertion port for inserting a tube to be painted and an intake port communicating with the outside, and a tube to be painted that is inserted through the tube insertion port into the painting chamber. A painting gun that opens toward the target and sprays paint, a tube insertion chamber that communicates with the painting chamber through a tube insertion port and that covers the circumference of the tube to be painted; The end is first
a first intake path communicating with the intake device via an air volume regulator;
A pipe exterior surface coating device comprising: a second air intake passage, one end of which communicates with the pipe insertion chamber, and the other end of which communicates with the first air intake passage via a second air volume regulator. 2. A painting chamber with a tube insertion port for inserting the pipe to be painted and an intake port communicating with the outside, and an opening into the painting chamber toward the tube to be painted that is inserted through the tube insertion port, A painting gun that injects a paint gun, a tube insertion chamber that communicates with the painting chamber through a tube insertion port and that covers the periphery of the tube to be painted, one end of which communicates with the painting chamber through a first throttle part, An intake passage whose other end communicates with the intake device, and a second constriction part whose one end communicates with the tube insertion chamber and whose other end communicates with the downstream side of the first constriction part of the intake passage. A pipe outer surface coating device characterized in that the size of the flow path of the second constriction portion is formed at a predetermined ratio.