Constant-pressure compressed air supply device

Abstract

The utility model relates to a compressed air constant pressure supply device which comprises a main pipeline and a PLC control device, and the main pipeline is sequentially provided with a first manual valve, a flowmeter, a first pressure sensor, a pressure regulating valve, a second pressure sensor and a second manual valve; the first manual valve and the second manual valve are used for gas stopping protection when equipment is overhauled; the pressure regulating valve is used for regulating the air supply pressure of the main pipeline; the flow meter is used for measuring the gas supply flow of the main pipeline; the first pressure sensor and the second pressure sensor are respectively used for measuring the air supply pressure at the two ends of the pressure regulating valve; the PLC control device is connected with the flow meter, the first pressure sensor, the pressure regulating valve and the second pressure sensor and used for obtaining air supply pressure and air supply flow data and achieving constant-pressure and constant-flow air supply by controlling the opening degree of the pressure regulating valve. Constant-pressure and constant-flow gas supply can be achieved, the overall influence of end users on the system is reduced, and energy conservation and consumption reduction are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a device for supplying compressed air with constant pressure. Background Art

[0002] At present, the power consumption of various compressors in use in China accounts for nearly 10% of the national power generation, nearly 900 billion kWh. Due to the limitations of investment costs and design concepts, most systems use header pipe gas supply. The header pipe gas supply pressure is based on the equipment with the highest gas pressure in the system. According to calculations, for every 0.1 MPa increase in pressure, the energy consumption of the air compressor increases by 5-7%, and the gas consumption of the system increases by 12-14%. In addition, since most on-site gas use environments do not use gas 24 hours a day, the high-pressure compressed air maintained during non-gas use stages further increases the gas loss of the system. Therefore, it causes huge energy waste to enterprises. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for supplying compressed air with constant pressure to solve the above technical problems.

[0004] The utility model provides a device for supplying compressed air with constant pressure, which includes a main pipeline and a PLC control device. A first manual valve, a flowmeter, a first pressure sensor, a pressure regulating valve, a second pressure sensor, and a second manual valve are sequentially arranged on the main pipeline.

[0005] The first manual valve and the second manual valve are used for gas cut-off protection during equipment maintenance.

[0006] The pressure regulating valve is used to adjust the gas supply pressure of the main pipeline.

[0007] The flowmeter is used to measure the gas supply flow of the main pipeline.

[0008] The first pressure sensor and the second pressure sensor are respectively used to measure the gas supply pressures at both ends of the pressure regulating valve.

[0009] The PLC control device is connected to the flowmeter, the first pressure sensor, the pressure regulating valve, and the second pressure sensor, and is used to obtain gas supply pressure and gas supply flow data, and realize constant pressure and constant flow gas supply by controlling the opening of the pressure regulating valve.

[0010] Furthermore, the device further includes an auxiliary pipeline, and an electric valve is arranged on the auxiliary pipeline. One end of the auxiliary pipeline is connected to the outlet of the first manual valve, and the other end is connected to the inlet of the second manual valve, and is used as a standby pipeline.

[0011] Furthermore, the electric ball valve is connected to the PLC control device.

[0012] Furthermore, the first manual valve and the second manual valve are manual gate valves.

[0013] Furthermore, the pressure regulating valve is an electric ball valve.

[0014] Furthermore, the electric valve is an electric ball valve.

[0015] Furthermore, the PLC control device includes an alarm module and a storage module.

[0016] By means of the above scheme, constant pressure and constant flow gas supply can be achieved through the compressed air constant pressure supply device, reducing the overall impact of end users on the system and achieving energy saving and consumption reduction.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the compressed air constant pressure supply device of the utility model.

[0019] Markings in the figure:

[0020] 1. Main pipeline; 2-First manual valve; 3. Flow meter; 4. First pressure sensor; 5. Pressure regulating valve; 6. Second pressure sensor; 7. Second manual valve; 8. Auxiliary pipeline; 9. Electric valve. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] Ginseng Figure 1 As shown, this embodiment provides a compressed air constant pressure gas supply device, including a main pipeline 1 and a PLC control device, on which a first manual valve 2, a flow meter 3, a first pressure sensor 4, a pressure regulating valve 5, a second pressure sensor 6, and a second manual valve 7 are sequentially arranged; the first manual valve 2 and the second manual valve 7 are used for gas stop protection during equipment maintenance; the pressure regulating valve 5 is used to adjust the gas supply pressure of the main pipeline; the flow meter 3 is used to measure the gas supply flow of the main pipeline; the first pressure sensor 4 and the second pressure sensor 6 are respectively used to measure the gas supply pressure at both ends of the pressure regulating valve 5; the PLC control device is connected to the flow meter 3, the first pressure sensor 4, the pressure regulating valve 5, and the second pressure sensor 6, and is used to obtain gas supply pressure and gas supply flow data, and realize constant pressure and constant flow gas supply by controlling the opening of the pressure regulating valve 5.

[0023] With this constant-pressure compressed air supply device, the supply pressure and flow rate can be adjusted by the PLC program to control the valve opening, achieving constant-pressure and constant-flow supply, which can play a very good role in adjusting the high end pressure and large flow fluctuations. Two manual valves are used for gas cut-off protection during equipment maintenance. The flowmeter is responsible for collecting the current pipeline flow data; the pressure sensor is responsible for collecting the current pipeline pressure data.

[0024] In this embodiment, the device further includes an auxiliary pipeline 8, and the auxiliary pipeline 8 is provided with an electric valve 9; one end of the auxiliary pipeline 8 is connected to the outlet of the first manual valve 2, and the other end is connected to the inlet of the second manual valve 7, and is used as a standby pipeline. The electric ball valve 9 is connected to the PLC control device and is controlled by the PLC control system. The valve of the auxiliary pipeline is responsible for ensuring system safety. When the control of the pressure regulating valve in the main pipeline fails, the system will automatically open the valve of the standby pipeline to supply gas, ensuring the stability of the system.

[0025] In this embodiment, the first manual valve 2 and the second manual valve 7 are manual gate valves.

[0026] In this embodiment, the pressure regulating valve 5 is an electric ball valve, and the electric valve 9 is an electric ball valve.

[0027] In this embodiment, the PLC control device includes an alarm module and a storage module for data anomaly alarm and data storage.

[0028] The device can set parameters according to processes, equipment, and workshops and perform intelligent control to achieve a constant-pressure and constant-flow gas supply mode, providing guarantee for on-site gas use safety; after the system is built, users can monitor the gas use and pressure conditions of each workshop and each process on-site in real time on the mobile terminal, which is of great help for achieving refined management; after the pressure of the branch pipeline is stable, it helps to eliminate and reduce the pressure redundancy of the main pipeline, which can help enterprises reduce the main pipeline pressure and contribute to reducing energy consumption; the device adopts modular components, is easy to install and runs reliably.

[0029] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A compressed air constant pressure supply device, characterized in that: It comprises a main pipeline (1) and a PLC control device, wherein the main pipeline (1) is provided with a first manual valve (2), a flow meter (3), a first pressure sensor (4), a pressure regulating valve (5), a second pressure sensor (6), and a second manual valve (7) in sequence; The first manual valve (2) and the second manual valve (7) are used for gas shut-off protection during equipment maintenance; The pressure regulating valve (5) is used to adjust the gas supply pressure of the main pipeline; The flow meter (3) is used to measure the gas supply flow rate of the main pipeline; The first pressure sensor (4) and the second pressure sensor (6) are respectively used to measure the gas supply pressure at both ends of the pressure regulating valve (5); The PLC control device is connected to the flow meter (3), the first pressure sensor (4), the pressure regulating valve (5), and the second pressure sensor (6) and is used to obtain gas supply pressure and gas supply flow data, and to achieve constant pressure and constant flow gas supply by controlling the opening of the pressure regulating valve (5).

2. The compressed air constant pressure supply device according to claim 1, characterized in that: It also includes an auxiliary pipeline (8), wherein the auxiliary pipeline (8) is provided with an electric valve (9); one end of the auxiliary pipeline (8) is connected to the outlet of the first manual valve (2), and the other end is connected to the inlet of the second manual valve (7), and is used as a backup pipeline.

3. The compressed air constant pressure supply device according to claim 2, characterized in that: The electric valve (9) is connected to the PLC control device.

4. The compressed air constant pressure supply device according to claim 1, characterized in that: The first manual valve (2) and the second manual valve (7) are manual gate valves.

5. The compressed air constant pressure supply device according to claim 1, characterized in that: The pressure regulating valve (5) is an electric ball valve.

6. The compressed air constant pressure supply device according to claim 2, characterized in that: The electric valve (9) is an electric ball valve.

7. The compressed air constant pressure supply device according to claim 1, characterized in that: The PLC control device comprises an alarm module and a storage module.

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