JP3505028B2 - Color change valve device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for selecting a coating fluid such as a paint or a cleaning fluid supplied from a fluid supply source via a supply pipe by a color changing valve. The present invention relates to a color changing valve device for selectively selecting and feeding a coating device such as a coating machine or another valve device. 2. Description of the Related Art FIGS. 4 and 5 are a sectional view and a fluid circuit diagram showing a conventional color changing valve device.
A plurality of air operated type color changing valves 54 are mounted on a manifold 53 having a coating fluid passage 52 connected to the coating machine 51, and each color changing valve 54 is supplied with a coating fluid or a cleaning fluid supplied from a coating fluid supply source 55. The coating fluid is selectively selected by the color changing valve 54 and supplied to the coating machine 51 from the coating fluid passage 52. A color changing valve 54 has a coating fluid supply source 55
A coating fluid supply pipe 56 for supplying a coating fluid from an air supply source, and an air pipe 58 for supplying operating air from an air supply source 57.
Are directly connected, and a coating fluid outlet 59 is formed to communicate with the coating fluid passage 52 with the color changing valve 54 attached to the manifold 53. When an electrostatic painting machine to which a high voltage is applied is used as the painting machine 51, the solenoid valve 60 for controlling the supply and discharge of the operating air is controlled to open and close by an electric signal input via an electric signal line 60a. Therefore, it is installed at a place away from the color changing valve device 50 disposed near the coating machine 51 to which high voltage is applied, and supplies the operating air to each color changing valve 54 through the air pipe 58. It is made as follows. Therefore, the length of each air pipe 58 is 10
m, the electromagnetic valve 60 is opened and closed by an electric signal to supply and exhaust the operating air, and even if the color changing valve 54 is opened and closed by the air pressure, a time lag based on the pipe length of the air pipe 58 occurs. However, there is a problem that the opening / closing timing of the color changing valve 54 is delayed. Therefore, recently, as shown in FIGS. 6 and 7, an intrinsically safe explosion-proof solenoid valve 61 is used as a solenoid valve for controlling the supply and discharge of the operating air, and is provided near the coating machine 51 to which a high voltage is applied. In addition to being able to be disposed, the intrinsically safe explosion-proof type electromagnetic valve 61 is provided integrally with the color change valve 62, so that the air flow path 63 from the electromagnetic valve 61 to the color change valve 62 is extremely shortened. Thus, there has been proposed an apparatus in which a time lag caused by the length of the pipe is suppressed to a negligible level (see Japanese Patent Application Laid-Open No. 6-285406). [0005] The color change valve 62 is mounted on the manifold 53, an intrinsically safe explosion-proof solenoid valve 61 is mounted on the color change valve 62, and a coating fluid supply pipe 56 is connected to each color change valve 62. The color change valve device 50 is assembled by connecting the air pipe 58 and the electric signal line 65 to 61. Here, when an electric signal is input to the intrinsically safe explosion-proof solenoid valve 61 of any color changing valve 62 and the solenoid valve 61 is opened to supply the operating air, the coating fluid outlet 64 is operated by the air pressure of the operating air. Is opened, paint and the like supplied from the coating fluid supply source 55 flow out of the color changing valve 62 and are supplied to the coating machine 51 through the coating fluid passage 52 of the manifold 53. At this time, since the solenoid valve 61 and the color changing valve 62 are provided integrally, the air flow path 63 from the solenoid valve 61 to the color changing valve 62 is short, and therefore, is opened and closed simultaneously with the input of the electric signal, and the pipe length There is almost no time lag caused by. However, in order to replace such a color change valve 62 or to inspect / clean the inside, the color change valve 62 attached to the manifold 53 is required.
However, since the color changing valve 62 is not only provided with the intrinsically safe explosion-proof solenoid valve 61 but also directly connected with the coating fluid supply pipe 56, first remove the solenoid valve 61. Next, the color change valve 62 cannot be removed unless the coating fluid supply pipe 56 is removed, and the attaching / detaching operation is very troublesome. In particular, recently, the color changing valve device 50 has been downsized, and each color changing valve 62 has been mounted at a high density, and accordingly, the piping has been dense, and the color changing valve 62 has been fixed to the manifold 53. Mounting screws are hidden by piping,
Since the pipes overlap each other, it was extremely difficult to attach and detach only one arbitrary color change valve 62. Further, when a new color changing valve 62 is mounted or a color changing valve that has been inspected / washed is mounted again, pipes must be connected again, which is very troublesome. Because it takes a long time to replace, etc.
If the bal breaks down during the operation of the line, it cannot be replaced promptly, and the line must be stopped during the replacement work, resulting in a problem that the production efficiency is reduced. Accordingly, the present invention suppresses the time lag caused by the length of the air pipe to a negligible level,
Even if the color change valve is mounted at high density, only the color change valve can be easily removed without removing the piping, and there is no need to reconnect the piping when replacing the color change valve etc. It is an object of the present invention to significantly reduce the time and effort required for valve replacement and to significantly reduce the time required for valve replacement. [0009] In order to solve this problem, the present invention provides a pneumatic manifold in which a coating fluid passage for supplying a coating fluid such as a paint for each color or a cleaning fluid to a coating device is formed. A plurality of color changing valves that are opened and closed are detachably mounted with their coating fluid outlets communicating with the coating fluid passages, and sent to the coating equipment from a plurality of coating fluids supplied from a coating fluid supply source. In the color changing valve device for selectively selecting one of the coating fluids to be supplied by the color changing valve and sending the selected coating fluid to the coating device, the manifold includes:
A coating fluid supply channel and an operating air channel for supplying a coating fluid and operating air to each color changing valve,
A connection flow path for guiding the coating fluid flowing out of the coating fluid outlet of the color changing valve to the coating fluid passage of the manifold is formed, and the operable air is supplied to each color changing valve via the operating air flow path. A safety explosion-proof solenoid valve is integrally attached to the manifold, and each of the color change valves communicates with the coating fluid supply flow path, the operated air flow path, and the connection flow path in a state where the valves are mounted on the manifold. The coating fluid inlet, the air inlet and outlet, and the coating fluid outlet are respectively formed at positions where the fluid flows. According to this, a coating fluid supply pipe is connected to a coating fluid supply channel formed in the manifold, and an air pipe is connected to an intrinsically safe explosion-proof solenoid valve integrally mounted on the manifold, and the color is also controlled. When the replacement valve is mounted on the manifold, the pipes are connected to the coating fluid inlet and the air inlet / outlet formed on the color replacement valve via the coating fluid supply channel and the operating air channel formed on the manifold. Each is communicated. Therefore, for example, if a paint hose for supplying each color paint from the paint supply source to the color changing valve is connected to the coating fluid supply flow path of the manifold, the paint supply source supplies the paint to the color change valve via the coating fluid supply flow path. Is supplied, and when the color changing valve is opened by the operating air, the paint flows out of the paint fluid outlet through the connection flow path into the paint fluid passage of the manifold, and is fed to a paint machine or the like. The operation air of the color change valve is turned on and off by an intrinsically safe explosion-proof solenoid valve which is opened and closed by an electric signal. The solenoid valve is integrally attached to the manifold, and the color change from the solenoid valve is performed. The operating air flow path to the valve air inlet / outlet can be made extremely short, and the color change valve opens and closes almost simultaneously with the input of an electrical signal to the solenoid valve, taking into account the time lag caused by the pipe length. No need to do. In this way, simply by mounting the color change valve on the manifold, each pipe such as paint pipe and air pipe is connected to the color change valve via the manifold, so the pipes are directly connected to the color change valve. There is no need to replace and check the color change valves, so there is no need to remove and attach piping, and even if multiple color change valves are mounted at high density, individual color change valves can be easily configured. The time required for valve replacement work can be reduced. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings. FIG. 1 is a sectional view showing a color changing valve device according to the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a fluid circuit diagram thereof. In FIG. 1, reference numeral 1 denotes each color paint supplied from a paint supply source 2P, a cleaning air supply source 2A, and a cleaning fluid supply source 2C.
A color changing valve device for selectively selecting a coating fluid such as a cleaning air or a cleaning fluid and supplying the selected coating fluid to a coating machine (coating device) 4. A coating fluid passage 5 connected to the coating device 4 is formed. A plurality of air operated type color change valves CV, CV,... Are mounted along the longitudinal direction of the manifold 6 so as to sandwich the coating fluid passage 5. The manifold 6 has a mounting hole 7 for inserting the color changing valve CV into the mounting position of each color changing valve CV, and a coating fluid and an operating fluid for each color changing valve CV mounted on the mounting hole 7. A connection for guiding a coating fluid flowing from a coating fluid outlet 10 of a color changing valve CV to a coating fluid passage 5 formed in the manifold 6, and a coating fluid supply channel 8 and an operating air channel 9 for supplying air, respectively. A flow path 11 is formed, and the coating fluid supply flow path 8 is formed.
Is connected to a coating fluid supply pipe 3 for supplying a coating fluid such as each color paint, cleaning air, and cleaning fluid from a paint supply source 2P, a cleaning air supply source 2A, and a cleaning fluid supply source 2C. The manifold 6 is integrally provided with an intrinsically safe explosion-proof solenoid valve SV for turning on and off the supply of operating air for opening and closing each color change valve CV. This intrinsically safe explosion-proof solenoid valve SV has its inlet 1
An operation air pipe 15 for supplying operation air from an air supply source 14 is connected to 3, an outlet 16 is directly connected to an operation air flow path 9 formed in the manifold 6, and the operation air flow path 9 is connected to the operation air flow path 9. It is formed in a three-way valve in which an exhaust port 17 opening to the atmosphere is formed. Opening and closing operation is performed by an electric signal input through an electric signal line 18, and when opened, the inflow port 13 and the outflow port 16 are conducted, and the color changing valve CV is operated through the operating air flow path 9.
Is supplied, and when closed, the outlet 16 and the exhaust port 17 are conducted to open the operated air passage 9 to the atmosphere. On the other hand, each color changing valve CV mounted in each mounting hole 7 of the manifold 6 has a needle 20 which opens and closes a coating fluid outlet 10 formed at the tip thereof is advanced and retracted by the air pressure of the operating air. The color changing valve CV is connected to the coating fluid supply flow path 8, the operating air flow path 9, and the connection flow path 11 in a state where the color changing valve CV is mounted in the mounting hole 7 of the manifold 6. At positions, the coating fluid inlet 21 and the air inlet 2
2 and a coating fluid outlet 10 are formed. Needle 2 for opening and closing coating fluid outlet 10
When the intrinsically safe explosion-proof solenoid valve SV for turning on / off the supply of the operating air is opened, the air inlet / outlet 22 of the color changing valve CV is urged by the spring 23 in the closing direction. Operate air is flowed in, and is retreated against the elasticity of the spring 23 by the pressure, and the coating fluid outlet 10 is opened. When the intrinsically safe explosion-proof solenoid valve SV is closed, the operated air flow path 9 is connected to the exhaust port 17 and is opened to the atmosphere. 2
3 and the coating fluid outlet 10 is closed. The above is an example of the configuration of the present invention, and its operation will be described below. First, the color change valves CV, CV,... Are mounted along the longitudinal direction of the manifold 6, and a paint pipe, a cleaning air pipe, and a cleaning liquid are supplied to the coating fluid supply channel 8 formed in the manifold 6 for each color change valve CV. Connect the coating fluid supply pipe 3 such as a pipe, and operate the air pipe 1 to the inlet 13 of each intrinsically safe explosion-proof solenoid valve SV.
5 is connected. Thus, the coating fluid inlet 21 and the coating fluid outlet 10 of each color changing valve CV are connected to the coating fluid supply flow path 8 and the connection flow path 11 formed in the manifold 6, respectively. The air inlet / outlet 22 of the valve CV is connected to the intrinsically safe explosion-proof solenoid valve SV through the operating air flow path 9.
Is connected to the outflow port 16. Each of the coating fluid supply pipes 3 is connected to the manifold 6, the operated air pipe 15 for supplying the operated air is connected to the intrinsically safe explosion-proof solenoid valve SV mounted on the manifold 6, and the pipes are connected to the color changing valve CV. There is no need to connect, so color change valve C
When attaching and detaching V, there is no need to remove or reconnect the piping. Here, any intrinsically safe explosion-proof solenoid valve SV
Is opened, the inflow port 13 and the outflow port 16 communicate with each other. Therefore, the operated air supplied from the air pipe 15 to the inflow port 13 is supplied to the outflow port 16 of the solenoid valve SV and the manifold 6.
Is supplied to the air inflow / outflow port 22 of the color changing valve CV through the operating air flow path 9, and the air pressure causes the needle 20 of the color changing valve CV to retreat to open the coating fluid outflow port 10. As a result, the coating fluid inlet 21 of the color changing valve CV and the coating fluid outlet 10 are communicated with each other, so that, for example, paint of an arbitrary color supplied via the coating fluid supply pipe 3 can be supplied to the coating fluid passage of the manifold 6. 5 and is supplied to the coating machine 4 to perform coating with the color paint. When the intrinsically safe explosion-proof solenoid valve SV is closed, the outflow port 16 and the exhaust port 17 communicate with each other.
Operated air in the color change valve CV is
2 flows back through the operated air flow path 9 to the outlet 16 of the solenoid valve SV and is discharged from the exhaust port 17 to the atmosphere. As a result, the air pressure in the color changing valve CV is released, so that the needle 20 is advanced by the resilience of the spring 23,
The coating fluid outlet 10 of the color changing valve CV is closed. As described above, the operating air for opening and closing the color changing valve CV is supplied and discharged by opening and closing the intrinsically safe explosion-proof solenoid valve SV integrally attached to the manifold 6, and the outlet 16 of the solenoid valve SV. Since the length of the operated air flow path 9 from the air inlet port 22 to the air inlet / outlet port 22 of the color changing valve CV can be made extremely short, a time lag due to the pipe length does not occur. Further, when the color changing valve CV is attached and detached for inspection and replacement, as described above, there is no need to disconnect or reconnect the piping, so that the color changing valve CV is not necessary.
Since only the V can be easily attached and detached, the time and labor required for the replacement can be greatly reduced, and the time required for replacing the color change valve CV can be shortened. Can be shortened.
Further, since it is not necessary to integrally form a valve for turning on / off the supply of the operating air with the color changing valve CV, not only can the color changing valve CV be manufactured at low cost, but also when the color changing valve CV fails. If only the valve CV or the intrinsically safe explosion-proof solenoid valve SV fails, it is sufficient to replace only the solenoid valve SV, and the cost required for maintenance can be reduced. In the above description, the manifold 6
The case where the mounting hole 7 for the color changing valve CV is formed is described above, but the present invention is not limited to this. In particular, the bottom surface of the color changing valve CV is applied to a rectangular parallelepiped block-shaped manifold where the mounting hole 7 is not formed. They may be attached in contact with each other. In this case, the coating fluid supply flow path 8, the operating air flow path 9, and the connection flow path 11 are opened on the color change valve mounting surface of the manifold, and the color change valve CV abuts on the color change valve mounting surface. In the bottom surface of the manifold, a coating fluid supply channel 8, an operating air channel 9, and a connection channel 11 of the manifold are provided.
The coating fluid outflow port 10, the coating fluid inflow port 21, and the operated air inflow / outflow port 22 may be formed so as to communicate with the fluid. As described above, according to the present invention, the intrinsically safe explosion-proof solenoid valve for turning on and off the operating air is provided integrally with the manifold, and the length of the air pipe for supplying the operating air is reduced. Not only can the resulting time lag be reduced to a negligible extent, but also by simply attaching the color change valve to the manifold, each piping is connected to the color change valve via the manifold, and the color change valve has piping Because it is not directly connected, there is no need to remove and replace the piping when replacing or checking the color change valve, and even if the color change valve is densely mounted, it can be easily installed and removed. This has a very excellent effect that the time required for valve replacement can be significantly reduced.

[Brief description of the drawings] FIG. 1 is a cross-sectional view of a color changing valve device according to the present invention. FIG. 2 is a perspective view thereof. FIG. 3 is a fluid circuit diagram thereof. FIG. 4 is a sectional view showing a conventional device. FIG. 5 is a fluid circuit diagram thereof. FIG. 6 is a sectional view showing another conventional apparatus. FIG. 7 is a fluid circuit diagram thereof. [Explanation of symbols] 1 ... Color changing valve device 2P: paint supply source (coating fluid supply source) 2A: Cleaning air supply source (coating fluid supply source) 2C: Cleaning fluid supply source (coating fluid supply source) 3 .... Coating fluid supply piping 4 .... Coating machine (painting equipment) 5 ... Coating fluid passage 6. Manifold CV: color change valve 8 ··· Coating fluid supply channel 9 ··· Operated air flow path 10. Coating fluid outlet 11 Connection channel SV: Intrinsically safe explosion-proof solenoid valve 21..Coating fluid inlet 22 ... Air inlet / outlet

Claims (1)

(1) An air pressure is applied to a manifold (6) in which a coating fluid passage (5) for supplying a coating fluid such as a paint or a cleaning fluid for each color to a coating device (4) is formed. A plurality of color change valves (CVs) that are opened and closed are detachably mounted with their coating fluid outlets (10) communicating with the coating fluid passages (5), and are provided from a coating fluid supply source (2P, 2A, 2C). One of the plurality of coating fluids to be supplied to the coating equipment (4) is selectively selected by the color change valve (CV) and sent to the coating equipment (4). In the color changing valve device for supplying, each of the color changing valves (CV) is provided in the manifold (6).
A coating fluid supply channel (8) and an operating air channel (9) for respectively supplying a coating fluid and operating air to the
A connecting flow path (11) is formed to guide the coating fluid flowing out of the coating fluid outlet (10) of the color changing valve (CV) to the coating fluid passage (5) of the manifold (6).
An intrinsically safe explosion-proof solenoid valve (SV) for supplying operated air to each color change valve (CV) through the operated air flow path (9) is integrally attached to the manifold (6), and each of the color change valves (CV) is provided. ) Is a position where the valve (CV) is mounted on the manifold (6) and communicates with the coating fluid supply channel (8), the operated air channel (9) and the connection channel (11). A coating fluid inlet (21), an air inlet / outlet (22), and a coating fluid outlet (10).