CN217004036U - Automatic switching system for low-pressure air supply of coating film - Google Patents
Automatic switching system for low-pressure air supply of coating film Download PDFInfo
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- CN217004036U CN217004036U CN202220451999.1U CN202220451999U CN217004036U CN 217004036 U CN217004036 U CN 217004036U CN 202220451999 U CN202220451999 U CN 202220451999U CN 217004036 U CN217004036 U CN 217004036U
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Abstract
The utility model relates to the technical field of coating equipment, in particular to a coating low-pressure air supply automatic switching system. The system comprises a main gas supply pipeline, a plurality of branch gas supply pipelines and a PLC control device, wherein the branch gas supply pipelines are connected with the main gas supply pipeline after being gathered; the starting end of each gas supply branch pipeline is connected with a gas cylinder through a plurality of gas inlet branch pipelines, and a primary pressure reducing valve, a pressure sensor, a one-way valve and an electromagnetic valve are sequentially connected between the starting end and the gathering connection point on each gas supply branch pipeline; a secondary pressure reducing valve is connected to the main gas supply pipeline; the pressure sensor and the PLC control device transmit the pressure value monitored in real time to the PLC control device; the first-stage pressure reducing valve, the second-stage pressure reducing valve and the electromagnetic valve are all connected and controlled by a PLC control device. The utility model adopts a PLC control mode to realize automatic switching of low-pressure gas supply for coating, automatically switches the gas supply source according to a pressure set value and gives an alarm to prompt the replacement of the gas source, thereby being convenient for use.
Description
Technical Field
The utility model relates to the technical field of coating equipment, in particular to a coating low-pressure air supply automatic switching system.
Background
The existing coating low-pressure gas supply system adopts a manual or semi-automatic switching system and cannot be automatically switched. The automatic switching high-pressure mode has high requirements on equipment, and an ordinary electromagnetic valve cannot meet the requirements and needs to be improved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic switching system for low-pressure air supply of a coating film, which solves the technical problems.
In order to solve the problems, the technical scheme adopted by the utility model is as follows:
a coating film low-pressure gas supply automatic switching system comprises a gas supply main pipeline, a plurality of gas supply branch pipelines and a PLC control device, wherein the gas supply branch pipelines are connected with the gas supply main pipeline after being gathered; the starting end of each gas supply branch pipeline is connected with a gas cylinder through a plurality of gas inlet branch pipelines, and a primary pressure reducing valve, a pressure sensor, a one-way valve and an electromagnetic valve are sequentially connected between the starting end and the gathering connection point on each gas supply branch pipeline; the main gas supply pipeline is connected with a secondary pressure reducing valve; wherein the content of the first and second substances,
after the gas cylinders converge, a pressure sensor is arranged between the primary pressure reducing valve and the one-way valve, and the pressure sensor controls the switching pressure;
the one-way valve is positioned between the pressure sensor and the electromagnetic valve and prevents backflow when the electromagnetic valve is switched;
the electromagnetic valve is positioned between the one-way valve and the secondary pressure reducing valve and is connected with the PLC control device to realize automatic switching;
the pressure sensor and the PLC control device transmit the pressure value monitored in real time to the PLC control device; the primary pressure reducing valve, the secondary pressure reducing valve and the electromagnetic valve are all connected and controlled by a PLC control device; the PLC control device automatically switches and gives an alarm for the gas cylinder according to the pressure set by the pressure sensor.
Preferably, the gathering connection point of each air supply branch pipeline is connected with an air storage tank through a pipeline; the secondary pressure reducing valve and the gas storage tank ensure stable gas supply pressure and no fluctuation of system pressure.
Preferably, manual valves are mounted on the air inlet branch pipes between the starting ends of the air supply branch pipes and the air cylinders; the manual valve is positioned between the gas cylinder and the first-stage pressure reducing valve, so that the gas cylinder is convenient to replace.
Has the advantages that: compared with the prior art, the utility model adopts the PLC control mode to realize automatic switching of low-pressure gas supply for coating, automatically switches the gas supply source according to the pressure set value, gives an alarm to prompt the replacement of the gas source, and is convenient to use.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the present invention.
In the figure: 1-a gas supply main pipeline; 2-a two-stage pressure reducing valve; 3-a gas storage tank; 4-a gas supply branch pipeline; 5-an electromagnetic valve; 6-a one-way valve; 7-a pressure sensor; 8-and a pressure reducing valve; 9-manual valve; and 10-gas cylinder.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
Examples
Referring to fig. 1, the automatic switching system for low-pressure gas supply for coating according to this embodiment includes a gas supply main pipeline 1, a plurality of gas supply branch pipelines 4, and a PLC control device (not shown in the figure), where each gas supply branch pipeline 4 is connected to the gas supply main pipeline 1 after being gathered. The gathering connection point of each air supply branch pipeline 4 is connected with an air storage tank 3 through a pipeline, and a secondary pressure reducing valve 2 is connected to the air supply main pipeline 1. The secondary pressure reducing valve 2 and the gas storage tank 3 are arranged to ensure stable gas supply pressure and no fluctuation of system pressure.
The starting end of each gas supply branch pipeline 4 is connected with a gas cylinder 10 through a plurality of gas inlet branch pipes, a manual valve 9 is installed on each gas inlet branch pipe, each gas inlet branch pipe is controlled through a single switch of the manual valve 9, and the gas cylinders 10 are convenient to replace.
Each air supply branch pipeline 4 is sequentially connected with a primary pressure reducing valve 8, a pressure sensor 7, a one-way valve 6 and an electromagnetic valve 5 from the starting end to the gathering connection point. The pressure sensor 7 and the PLC control device transmit the real-time monitored pressure value to the PLC control device; the first-stage pressure reducing valve 8, the second-stage pressure reducing valve 2 and the electromagnetic valve 5 are all connected and controlled by a PLC control device, and the PLC control device is further externally connected with an alarm device (the prior art is adopted, and the details are not repeated).
A pressure sensor 7 is arranged between the primary pressure reducing valve 8 and the one-way valve 6, and the switching pressure can be controlled through the pressure sensor 7. Check valve 6 is located in the middle of pressure sensor 7 and solenoid valve 5, can prevent the gas refluence when solenoid valve 5 switches, and simultaneously, solenoid valve 5 is located in the middle of check valve 6 and second grade relief pressure valve 2 to connect PLC controlling means and realize automatic switch, PLC controlling means sets up pressure according to pressure sensor 7, carries out the gas cylinder automatically and switches and reports to the police.
After gas enters the gas supply branch pipeline 4, the pressure is reduced to be less than or equal to 1MPa through the primary pressure reducing valve 8, then the pressure passes through the pressure sensor 7, the pressure sensor 7 transmits the monitored pressure value to the PLC control device, and the PLC control device controls the electromagnetic valve 5 to switch the gas (the low-pressure gas control requirement is low). After the gas is converged to a gas supply main pipeline 1, the pressure is reduced to 0.3-0.5MPa through a secondary pressure reducing valve 2, and the gas is supplied to the coating equipment at low pressure (a gas storage tank 3 can ensure the stable switching pressure of the system and control the stable switching of the pressure without pressure fluctuation).
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields, and are within the scope of the present invention.
Claims (3)
1. The utility model provides a coating film low pressure air feed automatic switching system which characterized in that: the device comprises a main gas supply pipeline (1), a plurality of branch gas supply pipelines (4) and a PLC control device, wherein the branch gas supply pipelines (4) are connected with the main gas supply pipeline (1) after being gathered; the starting end of each gas supply branch pipeline (4) is connected with a gas cylinder (10) through a plurality of gas inlet branch pipes respectively, and a primary pressure reducing valve (8), a pressure sensor (7), a one-way valve (6) and an electromagnetic valve (5) are connected to each gas supply branch pipeline (4) in sequence from the starting end to the gathering connection point; the main gas supply pipeline (1) is connected with a secondary pressure reducing valve (2)
The pressure sensor (7) is connected with the PLC control device and transmits the pressure value monitored in real time to the PLC control device; the primary pressure reducing valve (8), the secondary pressure reducing valve (2) and the electromagnetic valve (5) are all connected and controlled by a PLC control device.
2. The automatic switching system for low-pressure air supply for coating film of claim 1, wherein: the gathering connection point of each air supply branch pipeline (4) is connected with an air storage tank (3) through a pipeline.
3. The automatic switching system for low-pressure air supply for coating film according to claim 1 or 2, wherein: and manual valves (9) are mounted on the air inlet branch pipes between the starting ends of the air supply branch pipes (4) and the air bottles (10), and the manual valves (9) are positioned between the air bottles (10) and the primary pressure reducing valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220451999.1U CN217004036U (en) | 2022-03-02 | 2022-03-02 | Automatic switching system for low-pressure air supply of coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220451999.1U CN217004036U (en) | 2022-03-02 | 2022-03-02 | Automatic switching system for low-pressure air supply of coating film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217004036U true CN217004036U (en) | 2022-07-19 |
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ID=82395554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220451999.1U Active CN217004036U (en) | 2022-03-02 | 2022-03-02 | Automatic switching system for low-pressure air supply of coating film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217004036U (en) |
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2022
- 2022-03-02 CN CN202220451999.1U patent/CN217004036U/en active Active
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