Energy-saving structure of vertical piston type oxygen compressor

Abstract

The utility model relates to the technical field of vertical piston type oxygen compressors, in particular to an energy-saving structure of a vertical piston type oxygen compressor. Comprising an oxygen compressor body, a high-voltage fixed-frequency main motor, a high-voltage control cabinet, a high-voltage frequency converter and a DCS, an air inlet pipeline and an exhaust pipeline are arranged on the oxygen compressor body, a flowmeter primary instrument is arranged on the air inlet pipeline, a circuit breaker QF is arranged in the high-voltage control cabinet, and the flowmeter primary instrument is electrically connected with the high-voltage frequency converter through the DCS. The high-voltage fixed-frequency main motor is electrically connected with the high-voltage frequency converter, the circuit breaker QF is electrically connected with the high-voltage frequency converter, a 4-20 mA signal is given to the high-voltage frequency converter through the DCS, then the high-voltage frequency converter changes the rotating speed of the high-voltage fixed-frequency main motor in a variable-frequency mode, and therefore the purpose of adjusting the air quantity is achieved. The device can adapt to continuous long-time operation of the vertical piston type oxygen compressor, light-load starting and stopping are achieved, and the service life of the vertical piston type oxygen compressor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical piston oxygen compressors, in particular to an energy-saving structure of a vertical piston oxygen compressor. Background Art

[0002] Due to its unique design and high compression capacity, the vertical piston oxygen compressor plays an important role in various industrial and medical applications. Compared with other types of compressors, the vertical piston oxygen compressor has significant advantages, such as less wear between the cylinder and the piston, good sealing effect, extended service life, and due to its vertical design, the compressor has less vibration and a smaller foundation can be used.

[0003] However, from the working principle of the vertical piston oxygen compressor, it is known that the oxygen discharge volume of the compressor does not change under the fixed-frequency operation of the driving motor. The traditional product oxygen volume adjustment is carried out by using a vent valve, that is, the opening degree of the vent valve is adjusted according to the user's oxygen consumption to meet the usage requirements, and the excess product oxygen will be vented after compression, resulting in power loss. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an energy-saving structure of a vertical piston oxygen compressor, aiming to solve the technical problem in the prior art that from the working principle of the vertical piston oxygen compressor, the oxygen discharge volume of the compressor does not change under the fixed-frequency operation of the driving motor, and the traditional product oxygen volume adjustment is carried out by using a vent valve, that is, the opening degree of the vent valve is adjusted according to the user's oxygen consumption to meet the usage requirements, and the excess product oxygen will be vented after compression, resulting in power loss.

[0005] To achieve the above purpose, an energy-saving structure of a vertical piston oxygen compressor adopted by the utility model includes an oxygen compressor body, a high-voltage fixed-frequency main motor, a high-voltage control cabinet, a high-voltage frequency converter, and a DCS system. An intake pipeline and an exhaust pipeline are arranged on the oxygen compressor body. A primary flowmeter instrument is arranged on the intake pipeline. A circuit breaker QF is arranged in the high-voltage control cabinet. The primary flowmeter instrument is electrically connected to the high-voltage frequency converter through the DCS system. The high-voltage fixed-frequency main motor is electrically connected to the high-voltage frequency converter. The circuit breaker QF is electrically connected to the high-voltage frequency converter.

[0006] Wherein, the high-voltage control cabinet is connected to a 10 kV busbar.

[0007] Wherein, the high-voltage frequency converter, the high-voltage fixed-frequency main motor, and the circuit breaker are connected by a main cable.

[0008] Wherein, the primary flowmeter instrument and the DCS system are connected by a signal line.

[0009] Wherein, the DCS system provides a 4 - 20 mA signal for the high-voltage frequency converter.

[0010] Among them, the energy-saving structure of the vertical piston oxygen compressor further includes a frequency converter bypass cabinet, which includes switches QS1, QS2, and QS3. The switch QS1 is electrically connected between the circuit breaker QF and the high-voltage frequency converter. The switch QS2 is electrically connected between the high-voltage constant-frequency main motor and the high-voltage frequency converter. The switch QS3 is electrically connected between the high-voltage frequency converter and the circuit breaker QF.

[0011] An energy-saving structure of a vertical piston oxygen compressor of the present utility model includes an oxygen compressor body, a high-voltage constant-frequency main motor, a high-voltage control cabinet, a high-voltage frequency converter, and a DCS system. An intake pipeline and an exhaust pipeline are provided on the oxygen compressor body. A primary flowmeter instrument is provided on the intake pipeline. A circuit breaker QF is provided in the high-voltage control cabinet. The primary flowmeter instrument is electrically connected to the high-voltage frequency converter through the DCS system. The high-voltage constant-frequency main motor is electrically connected to the high-voltage frequency converter. The circuit breaker QF is electrically connected to the high-voltage frequency converter. A 4-20 mA signal is given to the high-voltage frequency converter through the DCS system, and then the high-voltage frequency converter changes the speed of the high-voltage constant-frequency main motor in a variable frequency manner, so as to achieve the purpose of regulating the gas volume. The design has a simple structure and stable performance, can adapt to the continuous long-term operation of the vertical piston oxygen compressor, and realizes light-load start-up and shutdown, improving the service life of the vertical piston oxygen compressor. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of the circuit principle decomposition of the vertical piston oxygen compressor of the present utility model.

[0014] Figure 2 It is a gas flow chart of the oxygen compressor body in the vertical piston oxygen compressor of the present utility model.

[0015] Figure 3 It is an oil flow chart of the oxygen compressor body in the vertical piston oxygen compressor of the present utility model.

[0016] Figure 4 It is a water flow chart of the oxygen compressor body in the vertical piston oxygen compressor of the present utility model. Detailed Embodiments

[0017] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0018] Please refer to Figures 1 to 4 , the present utility model provides an energy-saving structure for a vertical piston oxygen compressor, including an oxygen compressor body, a high-voltage fixed-frequency main motor, a high-voltage control cabinet, a high-voltage frequency converter, and a DCS system. An intake pipeline and an exhaust pipeline are provided on the oxygen compressor body. A primary flowmeter instrument is provided on the intake pipeline. A circuit breaker QF is provided in the high-voltage control cabinet. The primary flowmeter instrument is electrically connected to the high-voltage frequency converter through the DCS system. The high-voltage fixed-frequency main motor is electrically connected to the high-voltage frequency converter. The circuit breaker QF is electrically connected to the high-voltage frequency converter.

[0019] In this embodiment, a 4-20mA signal is given to the high-voltage frequency converter through the DCS system, and then the high-voltage frequency converter variably changes the speed of the high-voltage fixed-frequency main motor, so as to achieve the purpose of regulating the gas volume. The design of this structure is simple and the performance is stable. It can adapt to the continuous long-term operation of the vertical piston oxygen compressor, and realizes light-load start and stop, improving the service life of the vertical piston oxygen compressor.

[0020] Further, the high-voltage control cabinet is connected to a 10kV busbar.

[0021] Further, the high-voltage frequency converter, the high-voltage fixed-frequency main motor, and the circuit breaker are connected by a main cable.

[0022] In this embodiment, connecting by using a main cable not only improves the efficiency and stability of the system, but also simplifies the operation and maintenance process.

[0023] Further, the primary flowmeter instrument and the DCS system are connected by a signal line.

[0024] In this embodiment, connecting the primary flowmeter instrument and the DCS system by a signal line can improve the accuracy of data transmission and the stability of system operation.

[0025] Further, the DCS system provides a 4-20mA signal for the high-voltage frequency converter.

[0026] In this embodiment, connecting the DCS system and the high-voltage frequency converter by a 4-20mA signal line can improve the reliability of the transmitted signal, reduce interference, and ensure the safety and accuracy of the system.

[0027] Furthermore, the energy-saving structure of the vertical piston type oxygen compressor further includes a frequency converter bypass cabinet, which includes switches QS1, QS2, and QS3. The switch QS1 is electrically connected between the circuit breaker QF and the high-voltage frequency converter, the switch QS2 is electrically connected between the high-voltage constant-frequency main motor and the high-voltage frequency converter, and the switch QS3 is electrically connected between the high-voltage frequency converter and the circuit breaker QF.

[0028] In this embodiment, when the high-voltage frequency converter is operating normally, the switches QS1 and QS2 are closed, and the switch QS3 is open. When the high-voltage frequency converter is under maintenance, the switches QS1 and QS2 are open, and the switch QS3 is closed.

[0029] In this embodiment, when the gas consumption of downstream users decreases, the excess oxygen and nitrogen can only be discharged through the high-pressure relief of the oxygen compressor, or by closing the gas delivery valve slightly, relying on reducing the flow by returning the gas, or by low-pressure relief. This not only makes the operation cumbersome, but also the low-pressure relief has a certain impact on the operating conditions of the air separation equipment. Moreover, the high-pressure relief is noisy, and there is a certain risk in the high-pressure relief of oxygen. In addition, during the entire process of reducing the gas delivery, the power consumption of the oxygen compressor does not decrease linearly with the reduction of the load, resulting in a large amount of wasted power consumption. In view of the above situation, considering the change in the gas consumption of users, the energy-saving form of changing the constant-frequency operation of the vertical piston type oxygen compressor to variable-frequency operation is adopted, which fundamentally solves the above problems, not only with simple and reliable operation, but also with electricity savings.

[0030] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand the entire or partial processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. An energy-saving structure of a vertical piston oxygen compressor, characterized in that it includes an oxygen compressor body, a high-voltage fixed-frequency main motor, a high-voltage control cabinet, a high-voltage frequency converter and a DCS system. An intake pipeline and an exhaust pipeline are provided on the oxygen compressor body. A primary flowmeter instrument is provided on the intake pipeline. A circuit breaker QF is provided in the high-voltage control cabinet. The primary flowmeter instrument is electrically connected to the high-voltage frequency converter through the DCS system. The high-voltage fixed-frequency main motor is electrically connected to the high-voltage frequency converter. The circuit breaker QF is electrically connected to the high-voltage frequency converter.

2. The energy-saving structure of the vertical piston oxygen compressor according to claim 1, characterized in that the high-voltage control cabinet is connected to a 10 kV busbar.

3. The energy-saving structure of the vertical piston oxygen compressor according to claim 2, characterized in that the high-voltage frequency converter, the high-voltage fixed-frequency main motor and the circuit breaker are connected by a main cable.

4. The energy-saving structure of the vertical piston oxygen compressor according to claim 3, characterized in that the primary flowmeter instrument and the DCS system are connected by a signal line.

5. The energy-saving structure of the vertical piston oxygen compressor according to claim 4, characterized in that the DCS system provides a 4-20 mA signal for the high-voltage frequency converter.

6. The energy-saving structure of the vertical piston oxygen compressor according to claim 5, characterized in that the energy-saving structure of the vertical piston oxygen compressor further includes a frequency converter bypass cabinet. The frequency converter bypass cabinet includes switches QS1, QS2 and QS3. The switch QS1 is electrically connected between the circuit breaker QF and the high-voltage frequency converter. The switch QS2 is electrically connected between the high-voltage fixed-frequency main motor and the high-voltage frequency converter. The switch QS3 is electrically connected between the high-voltage frequency converter and the circuit breaker QF.

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