Gas loss detection device and compressor

Abstract

The utility model discloses a gas loss detection device and a compressor, and aims to solve the technical problems that the detection of the hydrogen leakage rate of the compressor is inaccurate, and leaked hydrogen is not recycled. The gas loss detection device comprises a recovery pipeline, a compression detection mechanism, a pneumatic control valve and a high-pressure separator are arranged on the recovery pipeline, the compression detection mechanism is communicated with an isolation cavity of a compressor, and hydrogen in the isolation cavity enters a hydrogen buffer tank of the compression detection mechanism to be stored and compressed; after being purified by the high-pressure separator, the hydrogen enters a gas inlet pipeline of the compressor to be reused, so that the waste of hydrogen is avoided and the cost is reduced; and a pressure gauge of the compression detection mechanism detects the pressure of the buffer tank, records the relationship between pressure change and time at a control end, and calculates the leakage rate of the compressor so as to judge the sealing performance of the compressor cylinder.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen energy equipment, and in particular to a gas loss detection device and a compressor. Background Art

[0002] When a liquid-driven piston compressor compresses hydrogen, the piston and the cylinder wall undergo oil-free friction, which can cause wear and tear over long periods of use, leading to hydrogen leakage.

[0003] The existing method for detecting hydrogen leaks in liquid-driven piston hydrogen compressors involves installing a float flowmeter in the hydrogen leak pipeline. Using a tapered glass tube engraved with a flow scale and the position of a float within the tube, the amount of hydrogen leaking from the compressor system is directly observed. Leaked hydrogen is then directly discharged through a venting system. However, this float flowmeter only provides a simple on-site measurement of hydrogen leakage, resulting in significant errors. Furthermore, direct discharge of leaked hydrogen wastes hydrogen and poses safety risks.

[0004] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] The present application provides a gas loss detection device, which aims to solve the current technical problems of inaccurate hydrogen leakage detection and non-recycling of leaked hydrogen; the present application also provides a compressor containing the detection device.

[0006] To solve the above technical problems, this application adopts the following technical solutions:

[0007] A gas loss detection device is designed, including a recovery pipeline, in which a compression detection mechanism, a gas control valve and a high-pressure separator are arranged, wherein hydrogen flows through the compression detection mechanism, the gas control valve and the high-pressure separator in sequence.

[0008] The compression detection mechanism includes a hydrogen buffer tank, a pressure gauge and a pressure transmitter, wherein the hydrogen buffer tank is connected to the compressor isolation chamber, the pressure gauge and the pressure transmitter are both arranged on the hydrogen buffer tank, and a one-way valve is provided on the pipeline between the hydrogen buffer tank and the compressor isolation chamber to prevent the hydrogen in the buffer tank from flowing back. The pressure gauge is used to detect the hydrogen pressure in the buffer tank, and the pressure transmitter is used to transmit the detected hydrogen pressure of the buffer tank to the PLC control system to record the relationship between pressure changes and time.

[0009] The air control valve is located between the hydrogen buffer tank and the high-pressure separator. When the pressure in the hydrogen buffer tank reaches the upper limit, the air control valve opens, and the hydrogen flows through the high-pressure separator for purification and then enters the compressor inlet. When the pressure in the hydrogen buffer tank reaches the lower limit, the air control valve closes, and the hydrogen leaked from the compressor continues to be stored and compressed in the buffer tank. The PLC control system records the time when the air control valve is opened and closed, and estimates the hydrogen leakage of the compressor based on the pressure change in the buffer tank and the corresponding time.

[0010] The high-pressure separator is provided with a one-way valve behind it. The high-pressure separator separates the hydraulic oil mixed in the hydrogen, and the purified hydrogen enters the compressor inlet.

[0011] A second aspect of the present application provides a compressor, comprising:

[0012] A first cylinder, a hydraulic cylinder, a second cylinder, a first isolation chamber, a second isolation chamber and the above-mentioned air loss detection device, the hydraulic cylinder is located between the first cylinder and the second cylinder, one end of the first isolation chamber is connected to the first cylinder, and the other end of the first isolation chamber is connected to the hydraulic cylinder; one end of the second isolation chamber is connected to the hydraulic cylinder, and the other end is connected to the second cylinder; one end of the recovery pipeline of the air loss detection device is connected to the first isolation chamber and the second isolation chamber, and the other end of the recovery pipeline is connected to the compressor intake pipeline.

[0013] One or more technical solutions provided in the examples of this application have at least any of the following technical effects or advantages:

[0014] The present invention can detect hydrogen leakage accurately, and the sealing status of the piston of the compressor system can be judged according to the hydrogen leakage amount; the leaked hydrogen can be reused after recovery and pressurization, which effectively avoids waste and helps reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a gas loss detection device according to an embodiment of the present application.

[0016] Figure 2 A schematic diagram of a compressor according to an embodiment of the present application.

[0017] Figure 3 This is a schematic diagram of a compressor and an air loss detection device according to an embodiment of the present application.

[0018] In the above figures, 100 is a gas loss detection device, 110 is a recovery pipeline, 111 is a first pipeline, 112 is a second pipeline, and 113 is a third pipeline; 120 is a detection compression mechanism, 121 is a hydrogen buffer tank, 122 is a pressure gauge, and 123 is a pressure transmitter; 130 is a gas control valve; 140 is a high-pressure separator; 151 is a first one-way valve, 152 is a second one-way valve, and 153 is a third one-way valve; 200 is a compressor, 210 is a first cylinder, 21 1 is the air inlet of the first cylinder, 212 is the exhaust port of the first cylinder; 220 is the hydraulic cylinder; 230 is the second cylinder, 231 is the air inlet of the second cylinder, 232 is the exhaust port of the second cylinder; 240 is the compressor air inlet line, 241 is the air inlet line of the first cylinder, 242 is the air inlet line of the second cylinder; 250 is the compressor exhaust line, 251 is the exhaust line of the first cylinder, 252 is the exhaust line of the second cylinder; 260 is the first isolation chamber, 270 is the second isolation chamber. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present application are described below with reference to the accompanying drawings and examples. However, the following examples are only used to illustrate the present invention in detail and do not limit the scope of the present application in any way.

[0020] In the description of the technical solution of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the technical solution. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "first," "second," etc., mentioned in this application, are used to distinguish the objects being described and do not have any order or technical meaning.

[0021] Unless otherwise specified, the devices involved in the following embodiments are conventional commercially available products.

[0022] Example 1: This example discloses a gas damage detection device 100, see Figure 1 and Figure 3 , including a recovery pipeline 110, in which a compression detection mechanism 120, a gas control valve 130 and a high-pressure separator 140 are provided, wherein hydrogen flows through the compression detection mechanism 120, the gas control valve 130 and the high-pressure separator 140 in sequence.

[0023] The compression detection mechanism 120 includes a hydrogen buffer tank 121, a pressure gauge 122 and a pressure transmitter 123, wherein the hydrogen buffer tank 121 is connected to the compressor isolation chamber, and the pressure gauge 122 and the pressure transmitter 123 are both arranged on the hydrogen buffer tank 121. A first one-way valve 151 is provided on the first pipeline 111 between the hydrogen buffer tank 121 and the first isolation chamber 260 of the compressor, and a second one-way valve 152 is provided on the second pipeline 112 between the hydrogen buffer tank 121 and the second isolation chamber 270 of the compressor to prevent the hydrogen in the buffer tank from flowing back. The pressure gauge 122 detects the hydrogen pressure in the hydrogen buffer tank 121, and the pressure transmitter 123 transmits the detected hydrogen pressure of the hydrogen buffer tank 121 to the PLC control system, and the control end records the relationship between pressure changes and time.

[0024] The air control valve 130 is provided in the third pipeline 113 of the recovery pipeline 110, and is located between the hydrogen buffer tank 121 and the high-pressure separator 140. When the hydrogen pressure in the hydrogen buffer tank 121 reaches the upper limit, the air control valve 130 is opened, and the hydrogen flows through the high-pressure separator 140 to separate impurities and then enters the compressor inlet pipeline 240; when the pressure in the hydrogen buffer tank 121 reaches the set lower limit, the air control valve 130 is closed, and the hydrogen buffer tank 121 continues to recover hydrogen and increase the pressure until it reaches the upper limit. The PLC control system records the opening and closing time of the air control valve, which is calculated by m=(ρ 上限 -ρ 下限 )V calculates the amount of hydrogen leakage during the period when the buffer tank pressure rises from the lower limit to the upper limit, and estimates the hydrogen leakage rate of the compressor based on the hydrogen mass in the buffer tank and the corresponding time.

[0025] A third one-way valve 153 is provided after the high-pressure separator 140 , and the purified hydrogen enters the compressor inlet pipeline 240 . The third one-way valve 153 prevents the clean hydrogen from flowing back.

[0026] Example 2: This example discloses a compressor 200, see Figure 2 and Figure 3 , comprising a first air cylinder 210, a hydraulic cylinder 220, a second air cylinder 230, a first isolation chamber 260, a second isolation chamber 270, and the air damage detection device 100 in the above embodiment. The hydraulic cylinder 220 is located between the first air cylinder 210 and the second air cylinder 230. One end of the first isolation chamber 260 is connected to the first air cylinder 210 and the other end is connected to the hydraulic cylinder 220. One end of the second isolation chamber 270 is connected to the hydraulic cylinder 220 and the other end is connected to the second air cylinder 230. The first isolation chamber 260 is in communication with the first pipeline 111 of the air damage detection device 100, and the second isolation chamber 270 is in communication with the second pipeline 112 of the air damage detection device 100.

[0027] Hydrogen enters the first cylinder 210 and the second cylinder 230 through the first cylinder air inlet 211 and the second cylinder air inlet 231 respectively. The hydrogen is compressed in the cylinder by the reciprocating motion of the piston, and is discharged at the first cylinder exhaust port 212 and the second cylinder exhaust port 232, and enters the compressor exhaust pipeline 250. During the compression process, the hydrogen in the first cylinder 210 and the second cylinder 230 will leak into the first isolation chamber 260 and the second isolation chamber 270. The leaked hydrogen enters the hydrogen buffer tank 121 through the first pipeline 111 and the second pipeline 112. The compressed hydrogen is purified by the high-pressure separator 140 and enters the compressor air inlet pipeline 240, thereby realizing the recycling of hydrogen.

[0028] Although some preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0029] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of the inventive concept. Thus, if such changes and modifications fall within the scope of the claims of this application and their equivalents, this application is intended to include such changes and modifications.

Claims

1. A gas loss detection device, characterized in that: include: A recovery pipeline, a compression detection mechanism and a high-pressure separator, one end of the recovery pipeline is connected to the corresponding compressor isolation chamber, and the other end is connected to the compressor air inlet; the compression detection mechanism is arranged in the recovery pipeline, which includes a hydrogen buffer tank and a pressure gauge and a pressure transmitter arranged on the hydrogen buffer tank, and the hydrogen buffer tank is connected to the compressor isolation chamber; the high-pressure separator is arranged in the recovery pipeline after the hydrogen buffer tank and is connected to the compressor air inlet.

2. The gas loss detection device according to claim 1, characterized in that: A gas control valve is further provided in the recovery pipeline, which is located between the hydrogen buffer tank and the high-pressure separator. Hydrogen flows through the hydrogen buffer tank, the gas control valve and the high-pressure separator in sequence.

3. The gas loss detection device according to claim 1, characterized in that: A one-way valve is provided after the high-pressure separator, and hydrogen flows through the high-pressure separator and the one-way valve in sequence and enters the compressor air inlet.

4. The gas loss detection device according to claim 1, characterized in that: A one-way valve is provided on the pipeline between the hydrogen buffer tank and the compressor isolation chamber to prevent hydrogen backflow.

5. A compressor, characterized in that: Containing the gas loss detection device according to claim 1, one end of the recovery pipeline of the gas loss detection device is connected to the first isolation chamber and the second isolation chamber of the compressor, and the other end is connected to the compressor intake pipeline.

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