Cooling water supply device of air compressor

Abstract

The utility model discloses an air compressor cooling water supply device which comprises a water inlet pipeline and a water outlet pipeline, and a first electromagnetic valve and a second electromagnetic valve are arranged on the water inlet pipeline in parallel. The air compressor is connected with the water inlet pipeline and the water outlet pipeline; the electric valve is arranged at one end, close to the air compressor, of the water inlet pipeline; and the electric control cabinet is connected with the first electromagnetic valve, the second electromagnetic valve and the electric valve and used for controlling opening and closing of the first electromagnetic valve, the second electromagnetic valve and the electric valve. According to the water supply device, the valve can be rapidly opened to supply cooling water when the air compressor needs to be opened, the valve is delayed to be closed after the air compressor is closed, and sufficient cooling water is achieved; after the air compressor is closed, the electric valve is firstly closed, then the electromagnetic valve is closed, cooling water is slowly cut off, and the pipeline water attack phenomenon is avoided; the air compressor in the standby state does not need to start circulating cooling water and is only started in advance before the air compressor needs to be started, the total outlet water temperature of the circulating cooling water is increased, and waste heat utilization is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a cooling water supply device for an air compressor. Background Art

[0002] In tobacco industrial enterprises, the compressed air required for the operation of pneumatic valves or pneumatic push rods comes from air compressors. There are multiple air compressors configured in the power center, which are responsible for the compressed air supply within the factory area. To ensure the stability of the air supply pressure, group control is adopted to achieve the coordinated operation of multiple air compressors. When the air compressors are in the group control state, the start and stop of the air compressors are based on the gas consumption demand. When the air pressure is lower than the group control set pressure, one more air compressor will be automatically started; when the air pressure is higher than the group control set pressure, one air compressor will be automatically reduced.

[0003] Due to the working characteristics of air compressors, a large amount of heat is generated during the operation of air compressors. Usually, circulating cooling water is used as the cooling system of air compressors to ensure the normal production of compressed air by air compressors. The intake of the circulating cooling water system is controlled by an electric valve. To avoid the air compressor tripping due to high temperature caused by insufficient cooling water volume, the cooling water volume can only be normally started when it meets the starting conditions of the air compressor. Therefore, the circulating cooling water intake valve needs to be opened in advance before starting the air compressor. When the air pressure is lower than the group control set pressure, in order to achieve the rapid start of the standby air compressor, the cooling water intake electric valve of the standby air compressor is in the open state.

[0004] At present, tobacco industrial enterprises are equipped with multiple air compressors to provide compressed air for cigarette production. To ensure the stability of the air supply pressure, group control is adopted to achieve the coordinated operation of multiple air compressors, and multiple air compressors share one cooling water pump. When the air pressure is lower than the group control set pressure, one more air compressor will be automatically started. The normal water supply of the air compressor cooling system is a necessary condition for the start of the air compressor. Whether the cooling system supplies water normally depends on whether the intake electric valve is normally opened. It takes a certain amount of time for the electric valve to open to meet the starting conditions of the air compressor, which may cause fluctuations in the air supply pressure. Therefore, in order to achieve the rapid start of the standby air compressor, the cooling water intake electric valve of the standby air compressor is in the open state. The outlet water temperature of the circulating cooling water of the standby air compressor is lower than that of the circulating cooling water of the normally operating air compressor, resulting in a lower total outlet water temperature of the circulating cooling water, which is not conducive to the subsequent waste heat recovery and utilization, causing energy waste.

[0005] Therefore, there is an urgent need to design a cooling water supply device for an air compressor that meets the requirements. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a cooling water supply device for an air compressor, which can quickly supply cooling water to the air compressor, realize the rapid start of the air compressor, solve the problem that the circulating cooling water of the standby air compressor causes the reduction of the total outlet water temperature of the circulating cooling water due to early opening, improve the effect of waste heat recovery and utilization, and reduce energy waste.

[0007] The technical problems to be solved by the present utility model are realized through the following technical solutions:

[0008] An air compressor cooling water supply device, comprising:

[0009] An inlet pipeline and an outlet pipeline, wherein a first solenoid valve and a second solenoid valve are arranged in parallel on the inlet pipeline;

[0010] An air compressor, which is connected to the inlet pipeline and the outlet pipeline;

[0011] An electric valve, which is arranged at one end of the inlet pipeline close to the air compressor;

[0012] An electric control cabinet, which is respectively connected to the first solenoid valve, the second solenoid valve and the electric valve, and is used for controlling the opening and closing of the first solenoid valve, the second solenoid valve and the electric valve.

[0013] Preferably, pressure gauges and temperature gauges are arranged on both the inlet pipeline and the outlet pipeline.

[0014] Preferably, the electric control cabinet includes a control relay and a time-delay relay, and is used for quickly opening the first solenoid valve or the second solenoid valve when the air compressor starts, and for closing the electric valve with a time delay when the air compressor stops.

[0015] Preferably, the connection between the electric control cabinet and the first solenoid valve, the second solenoid valve and the electric valve is a wired connection or a wireless connection.

[0016] Preferably, the electric control cabinet can automatically control the start and stop of the air compressor according to the air pressure signal.

[0017] Preferably, the electric control cabinet is connected to an automatic control system, and the automatic control system is used for sending start or stop signals.

[0018] The above technical solutions of the present utility model have the following beneficial effects:

[0019] (1) It provides a water supply device with quick opening and slow closing of circulating cooling water, which can quickly open the valve to supply cooling water when the air compressor needs to be opened, and delay closing the valve after the air compressor is closed, so as to achieve sufficient cooling water;

[0020] (2) After the air compressor is closed, first close the electric valve, and then close the solenoid valve, slowly cutting off the cooling water to avoid the generation of water hammer phenomenon in the pipeline;

[0021] (3) In the standby state, the air compressor does not need to start the circulating cooling water, and only needs to be opened in advance before starting the air compressor, which improves the total outlet temperature of the circulating cooling water and is beneficial to the utilization of waste heat. Description of the Drawings

[0022] The drawings incorporated in and forming a part of the specification illustrate embodiments of the present utility model and, together with the description thereof, are used to explain the principles of the present utility model.

[0023] Figure 1 It is a schematic diagram of the air compressor cooling water supply device of the present utility model.

[0024] Wherein: 1 - inlet pipe, 2 - first solenoid valve, 3 - second solenoid valve, 4 - electric valve, 5 - air compressor, 6 - electrical control cabinet, 7 - outlet pipe, 8 - pressure gauge, 9 - thermometer. Detailed Embodiments

[0025] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model.

[0026] Figure 1 It is a schematic diagram of the air compressor cooling water supply device of the present utility model. Figure 1 The arrows in it indicate the flow direction of water. As shown in the figure:

[0027] The inlet pipe 1 and the outlet pipe 7 are respectively connected to the air compressor 5. The first solenoid valve 2, the second solenoid valve 3, and the electric valve 4 are installed on the inlet pipe 1. The first solenoid valve 2 and the second solenoid valve 3 are connected in parallel to achieve one in use and one in standby. Under normal circumstances, the first solenoid valve 2 is used, and the second solenoid valve 3 is in standby.

[0028] The air compressor 5 is equipped with an electrical control cabinet 6, and the air compressor 5 realizes start-stop control through the electrical control cabinet 6. Both the first solenoid valve 2 and the second solenoid valve 3 are connected to the electrical control cabinet 6. The electrical control cabinet 6 includes a control relay and a time-delay relay.

[0029] Pressure gauges 8 and thermometers 9 are provided on both the inlet pipe 1 and the outlet pipe 7 for real-time display of the pressure and temperature inside the pipes.

[0030] The working process of the air compressor cooling water supply device of the present application:

[0031] (1) Standby state:

[0032] During production, the air compressors that can be used normally are placed under group control. The air compressor 5 is in the standby state without starting. At this time, the electric valve 4 is in the open state, allowing cooling water to pass through; both the first solenoid valve 2 and the second solenoid valve 3 are in the closed state. The electrical control cabinet 6 continuously monitors the system status and adjusts the working status of the solenoid valves and the electric valve 4 as needed.

[0033] (2) Starting process:

[0034] When it is detected that the air supply pressure is lower than the group control set pressure, the air compressor 5 needs to be started, and the automatic control system sends a start signal to the electric control cabinet 6. When receiving the start signal of the air compressor 5, the electric control cabinet 6 triggers the control relay to control the first solenoid valve 2 or the second solenoid valve 3 on the water inlet pipe 1 (if the first solenoid valve 2 fails, the second solenoid valve 3 can be immediately switched for use to ensure the stable operation of the water supply device) to open, so that the circulating cooling water works normally. Since the solenoid valve opens quickly, the air compressor 5 can be started quickly. At the same time, the pressure gauge 8 and the thermometer 9 display the pressure and temperature in the pipeline in real time.

[0035] (3) Shutdown state:

[0036] When it is detected that the air supply pressure is higher than the group control set pressure, the air compressor 5 needs to be stopped, and the automatic control system sends a stop signal to the electric control cabinet 6. Since there is still a large amount of heat after the air compressor 5 is shut down, when receiving the stop signal of the air compressor 5, the electric control cabinet 6 starts the time-delay relay to delay for a set time (the delay time can be adjusted according to the specific working conditions), and then automatically closes the electric valve 4 on the circulating cooling water inlet pipe 1 through the control relay. After the electric valve 4 is completely closed, the first solenoid valve 2 is then closed, and then the electric valve 4 is opened, and the solenoid valve is opened again the next time the air compressor start condition is met, so as to realize the fast and stable water supply of the cooling system.

[0037] The opening and closing speeds of the solenoid valve are very fast, usually less than 1 second. When the air compressor needs to be started with the electric valve open, the solenoid valve opens quickly, enabling the fast supply of circulating cooling water, and the start-up time required for the air compressor is significantly shortened, without causing a significant drop in the air supply pressure.

[0038] When the air compressor needs to be stopped, there is still a large amount of heat after the air compressor 5 is shut down. The circulating cooling water electric valve 4 is set to delay closing. When the outlet temperature of the high-pressure rotor is lower than the set temperature, the electric valve 4 is closed. Since the time required for the electric valve 4 to move from the open position to the closed position exceeds 1 minute, the cooling water is slowly cut off, which can avoid the occurrence of water hammer in the pipeline. After the electric valve 4 is closed in place, the solenoid valve is then closed, and then the electric valve 4 is opened again to provide conditions for the next fast start-up.

[0039] Although the present utility model has been disclosed above with embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make various different selections and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model is defined by the claims and their equivalent forms.

Claims

1. An air compressor cooling water supply device, characterized in that, Comprising: An inlet pipeline (1) and an outlet pipeline (7), wherein a first solenoid valve (2) and a second solenoid valve (3) are arranged in parallel on the inlet pipeline (1); An air compressor (5), which is connected to the inlet pipeline (1) and the outlet pipeline (7); An electric valve (4), which is arranged at one end of the inlet pipeline (1) close to the air compressor (5); An electric control cabinet (6), which is respectively connected to the first solenoid valve (2), the second solenoid valve (3) and the electric valve (4) and is used to control the opening and closing of the first solenoid valve (2), the second solenoid valve (3) and the electric valve (4).

2. The air compressor cooling water supply device according to claim 1, wherein Pressure gauges (8) and thermometers (9) are provided on both the inlet pipeline (1) and the outlet pipeline (7).

3. The air compressor cooling water supply device according to claim 1, characterized in that The electric control cabinet (6) includes a control relay and a time-delay relay, and is used to quickly open the first solenoid valve (2) or the second solenoid valve (3) when the air compressor (5) starts, and to close the electric valve (4) with a time delay when the air compressor (5) stops.

4. The air compressor cooling water supply device according to claim 1, wherein The connection between the electric control cabinet (6) and the first solenoid valve (2), the second solenoid valve (3) and the electric valve (4) is a wired connection or a wireless connection.

5. The air compressor cooling water supply device according to claim 1, characterized in that, The electric control cabinet (6) can automatically control the start and stop of the air compressor (5) according to the air pressure signal.

6. The air compressor cooling water supply device according to claim 1, characterized in that, The electric control cabinet (6) is connected to an automatic control system, and the automatic control system is used to send start or stop signals.

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