A disturbance-free switching control device for compressor load adjustment

Abstract

The object of the present invention is to provide a disturbance-free switching control device for adjusting the load of a compressor, which is used to reduce the disturbance in the switching process of the compressor so that it does not affect the production environment. The device comprises a disturbance-free switching unit, the number of which is equal to the number of compressors. The disturbance-free switching unit comprises: a valve connector and a multi-way joint for controlling whether the valve is intake air. The number of the valve connectors is equal to the number of valves in the compressor cylinder. The number of passages of the multi-way joint is 1 greater than the number of the valve connectors. The intake passage of the multi-way joint is connected to the outlet end of the air source main pipe, and the remaining passages of the multi-way joint are respectively connected to the intake end of the valve connector, and the outlet end of the valve connector is connected to the valve of the compressor cylinder, so as to reduce the load of a single compressor. Multiple sets of disturbance-free switching units adjust the load of multiple compressors so that load reduction and load increase complement each other. The entire switching process does not require shutdown, so that the switching of the compressor does not affect the production environment.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor load adjustment, and in particular relates to a disturbance-free switching control device for compressor load adjustment. Background Art

[0002] Gas compressors are widely used in industry, and they are often used in the chemical industry. The commonly used compression mode is multi-stage compression. Compared with single-stage compression, multi-stage compression has many advantages, such as being able to effectively reduce the exhaust temperature of the compressor, save power consumption, improve the utilization rate of the cylinder volume, and reduce the maximum gas force on the piston. In most use environments, the compressor is required to work at 100% load. The load of the compressor is affected by the valve of the compressor cylinder. One valve represents a compression stage. Currently, two-stage compression is commonly used, that is, the number of valves in the compressor cylinder is 2, and each compression stage is equivalent to 50% of the load. If the compressor works for too long at 100% load, it may cause damage to the core components inside the compressor, so a spare compressor is often equipped to replace the main compressor. Two or more compressors work in turn to greatly improve safety and extend the service life of the compressor. However, although the problem of a single compressor not being able to work for too long can be solved by setting up two compressors as backup for each other, in the switching process of the two compressors, one compressor needs to be stopped first and then the other compressor is turned on. There is a gap in such a switching process, which will cause a large disturbance to the production environment and is not conducive to production. Therefore, it is necessary to develop a disturbance-free switching control device for compressor load adjustment. Summary of the invention

[0003] The object of the present invention is to provide a disturbance-free switching control device for adjusting compressor load, which is used to reduce disturbances during compressor switching so as not to affect the production environment.

[0004] The technical solution of the present invention to solve its technical problem is: a disturbance-free switching control device for compressor load adjustment, including a disturbance-free switching unit, the number of the disturbance-free switching units is equal to the number of compressors, the disturbance-free switching unit includes: a valve connector, a multi-way joint, and an air source main pipe for controlling whether the valve is to intake air, the number of the valve connectors is equal to the number of compressor cylinder valves, the number of passages of the multi-way joint is 1 greater than the number of the valve connectors, the intake passage of the multi-way joint is connected to the outlet end of the air source main pipe, the remaining passages of the multi-way joint are respectively connected to the intake end of the valve connector, and the outlet end of the valve connector is connected to the compressor cylinder valve.

[0005] The valve connecting part includes: a terminal joint, a short joint, and a three-way valve. The outlet end of the terminal joint is connected to the inlet end of the compressor cylinder valve, and the inlet end of the terminal joint is connected to one path of the three-way valve through the short joint. One of the remaining two paths of the three-way valve is connected to a corresponding path in the multi-way joint, and the other path is connected to the atmosphere.

[0006] The compressed air delivered from a large air compressor station often contains water. In order to deposit the moisture in the compressed air entering from the air source main pipe, an air source storage tank is also included. The air inlet end of the air source storage tank is connected to the air outlet end of the air source main pipe, and the air outlet end of the air source storage tank is connected to the air inlet passage of the multi-way joint. The air source storage tank is provided with a drain valve for discharging the accumulated water in the air source storage tank.

[0007] The compressed air delivered from a large air compressor station often contains desiccant. In order to filter the compressed air to meet production requirements, a filter is also included. The air inlet end of the filter is connected to the air outlet end of the air source tank, and the air outlet end of the filter is connected to the air inlet passage of the multi-way connector.

[0008] In order to adjust and stabilize the pressure of compressed air so that the air entering the compressor cylinder valve meets the requirements and is stable, a pressure reducing valve is also included, the air inlet end of the pressure reducing valve is connected to the air outlet end of the filter, and the air outlet end of the pressure reducing valve is connected to the air inlet passage of the multi-way connector.

[0009] The beneficial effects of the present invention are as follows: by setting a disturbance-free switching unit composed of a valve connector and a multi-way joint for controlling whether the valve takes in air, the number of the valve connectors is the same as the number of valves in the compressor cylinder, and the disturbance-free switching unit forms a passage with the air source main pipe through the multi-way joint, thereby realizing load reduction of a single compressor, and load adjustment of multiple compressors is performed through multiple sets of disturbance-free switching units, so that load reduction and load increase complement each other, so that the total load position is 100%, and no shutdown is required during the entire switching process, so that the switching of the compressor does not affect the production environment; by setting an air source storage tank, moisture in the compressed air is deposited and regularly discharged through a drain valve; by setting a filter, the compressed air is filtered; by setting a pressure reducing valve, the pressure of the compressed air is adjusted and stabilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention.

[0011] Figure 2 It is a gas path principle block diagram of the present invention. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] like Figure 1 As shown, the present invention includes a disturbance-free switching unit, the number of which is equal to the number of compressors, and the disturbance-free switching unit includes: a valve connector for controlling whether the valve is inletting air, a multi-way joint 1, and an air source main pipe 2, the number of the valve connectors is equal to the number of compressor cylinder valves 3, the number of passages of the multi-way joint 1 is 1 greater than the number of the valve connectors, the air intake passage of the multi-way joint 1 is connected to the air outlet end of the air source main pipe 2, the remaining passages of the multi-way joint 1 are respectively connected to the air intake end of the valve connector, and the air outlet end of the valve connector is connected to the compressor cylinder valve 3.

[0014] The valve connecting part includes: a terminal joint 4, a short joint 5, and a three-way valve 6. The outlet end of the terminal joint 4 is connected to the inlet end of the compressor cylinder valve 3. The inlet end of the terminal joint 4 is connected to one path of the three-way valve 6 through the short joint 5. One of the remaining two paths of the three-way valve 6 is connected to a corresponding path in the multi-way joint 1, and the other path is connected to the atmosphere.

[0015] The compressed air delivered from a large air compression station often contains water. In order to deposit the moisture in the compressed air entering from the air source main pipe 2, an air source storage tank 7 is also included. The air inlet end of the air source storage tank 7 is connected to the air outlet end of the air source main pipe 2, and the air outlet end of the air source storage tank 7 is connected to the air inlet passage of the multi-way connector 1. The air source storage tank 7 is provided with a drain valve 8 for discharging the accumulated water in the air source storage tank 7.

[0016] The compressed air delivered from a large air compression station often contains a desiccant. In order to filter the compressed air to meet production requirements, a filter 9 is also included. The air inlet end of the filter 9 is connected to the air outlet end of the air source storage tank 7, and the air outlet end of the filter 9 is connected to the air inlet passage of the multi-way connector 1.

[0017] In order to adjust and stabilize the pressure of compressed air so that the air entering the compressor cylinder valve meets the requirements and is stable, a pressure reducing valve 10 is also included, the air inlet end of the pressure reducing valve 10 is connected to the air outlet end of the filter 9, and the air outlet end of the pressure reducing valve 10 is connected to the air inlet passage of the multi-way connector 1.

[0018] The principle adopted by the present invention is: a part of the compressor cylinder valves 3 are closed through a disturbance-free switching unit to reduce the number of multi-stage compression stages of one of the compressors, and at the same time, another compressor is opened, and a part of the compressor cylinder valves 3 are closed through another set of disturbance-free switching units to reduce the number of multi-stage compression stages of the second compressor. The total number of compressor cylinder valves 3 opened by the two compressors is equal to the number of fully opened cylinder valves 3 of one compressor, and the total number of multi-stage compression stages of the two compressors remains unchanged; then all the valves of the first compressor are closed, and all the valves of the second compressor are opened to complete the switching of the two compressors.

[0019] The working process and principle are described in detail below, assuming that two compressors of the same model are set up (equipped with two sets of disturbance-free switching units), the number of cylinder valves 3 of each compressor is 2 (corresponding to two-stage compression), the multi-way connector 1 of each set of disturbance-free switching unit is a three-way connector, and the number of valve connectors is 2.

[0020] First, after the first compressor is started, it runs for 10-15 minutes to reach 100% load working condition. At this time, the gas from the gas source main pipe 2 is sequentially passed through the gas source storage tank 7 to deposit moisture, filtered through the filter 9, and then enters the two valve connectors through the three-way joint after adjusting the stable pressure through the pressure reducing valve 10. At this time, the passages connecting the two three-way valves 6 in the two valve connectors to the atmosphere are closed, and the gas enters the compressor cylinder valve 3 through the short joint 5 and the terminal joint 4;

[0021] When the compressor needs to be switched, the passage connected to the air valve by the three-way valve 6 in one of the air valve connectors is closed, and the passage connected to the atmosphere is opened, so that the first compressor performs single-stage compression, that is, works at 50% load. Since the gas volume of the air source main pipe 2 is unchanged, the air valve cannot be simply closed, so half of the compressed air is discharged into the atmosphere through the three-way valve 6; at the same time, the second compressor is turned on, and in another set of disturbance-free switching units, the passage connected to the air valve by the three-way valve 6 in one of the air valve connectors is also kept closed, and the passage connected to the atmosphere is opened, so that the second compressor also performs single-stage compression, that is, works at 50% load, and the total load of the two compressors is 100%;

[0022] When the second compressor runs stably, turn off the first compressor, and at the same time, close all the passages connecting the three-way valve 6 in the two valve connectors of the second compressor to the atmosphere, so that both valves are put into use to reach 100% load, and complete the switching of the compressors.

[0023] For compressors of different models, the number of compressor cylinder valves 3 is also different. When the number of valves increases, the number of valve connectors required must also increase accordingly. In the present invention, 50% load is used as a transition. If the number of cylinder valves is 4 (4-stage compression), the transition is performed at 25% load each time, which is smoother. It should be noted that the disturbance-free mentioned in the present invention refers to no impact on the production environment, and there is no absolute disturbance. Due to the switching of the compressor, disturbances are inevitable, but since the device does not need to be stopped in the middle, it does not affect the production environment.

[0024] By setting a disturbance-free switching unit composed of a valve connector and a multi-way joint for controlling whether the valve takes in air, the number of the valve connectors is the same as the number of valves in the compressor cylinder. The disturbance-free switching unit forms a passage with the air source main pipe through the multi-way joint, thereby realizing load reduction of a single compressor. Through multiple sets of disturbance-free switching units, load adjustment is performed on multiple compressors, so that load reduction and load increase complement each other, so that the total load position is 100%, and no shutdown is required during the entire switching process, so that the switching of the compressor does not affect the production environment; by setting an air source storage tank, moisture in the compressed air is deposited and discharged regularly through a drain valve; by setting a filter, the compressed air is filtered; by setting a pressure reducing valve, the pressure of the compressed air is adjusted and stabilized.

Claims

1. A disturbance-free switching control device for load adjustment of a compressor, characterized in that: The invention comprises a disturbance-free switching unit, the number of which is equal to the number of the compressors, and the disturbance-free switching unit comprises: a valve connector for controlling whether the valve is inlet, a multi-way joint, and an air source main pipe, the number of the valve connectors is equal to the number of the compressor cylinder valves, the number of passages of the multi-way joint is one greater than the number of the valve connectors, the air inlet passage of the multi-way joint is connected to the air outlet end of the air source main pipe, the remaining passages of the multi-way joint are respectively connected to the air inlet end of the valve connector, and the air outlet end of the valve connector is connected to the compressor cylinder valve ; The valve connecting part includes: a terminal joint, a short joint, and a three-way valve. The air outlet end of the terminal joint is connected to the air inlet end of the compressor cylinder valve, and the air inlet end of the terminal joint is connected to one path of the three-way valve through the short joint. One of the remaining two paths of the three-way valve is connected to a corresponding path in the multi-way joint, and the other path is connected to the atmosphere; it also includes an air source storage tank, the air inlet end of the air source storage tank is connected to the air outlet end of the air source main pipe, the air outlet end of the air source storage tank is connected to the air inlet path of the multi-way joint, and the air source storage tank is provided with a drain valve for discharging accumulated water in the air source storage tank.

2. A compressor load adjustment disturbance-free switching control device according to claim 1, characterized in that: It also includes a filter, the air inlet end of the filter is connected to the air outlet end of the air source storage tank, and the air outlet end of the filter is connected to the air inlet passage of the multi-way connector.

3. A compressor load adjustment disturbance-free switching control device according to claim 1, characterized in that: It also includes a pressure reducing valve, the air inlet end of the pressure reducing valve is connected to the air outlet end of the filter, and the air outlet end of the pressure reducing valve is connected to the air inlet passage of the multi-way connector.

Images