Gas recovery system and gas delivery device

Abstract

The application provides a gas recovery system and a gas delivery device. The gas recovery system is applied to the gas delivery device, and comprises an air inlet pipeline, a leakage gas recovery pipeline and a release gas recovery pipeline. One end of the leakage gas recovery pipeline is communicated to the air inlet pipeline, and the other end is used for being communicated to a breathing port of the gas delivery device. One end of the release gas recovery pipeline is communicated to the air inlet pipeline, and the other end is communicated to a release pipeline of the gas delivery device. The gas recovery system of the application can recover the gas leaked from the breathing port and the gas released through the release pipeline by arranging the leakage gas recovery pipeline and the release gas recovery pipeline. Moreover, since the leakage gas recovery pipeline directly communicates the breathing port and the air inlet pipeline, and the release gas recovery pipeline directly communicates the release pipeline and the air inlet pipeline, there is no risk of introducing air, and the purity of the working gas is ensured. Meanwhile, no additional gas tank is arranged, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of gas transport technology, and in particular to a gas recovery system and a gas transport device. Background Technology

[0002] With the widespread application of gas conveying devices, the problem of gas waste during operation has become increasingly prominent. Taking screw gas compressors as an example, gas loss mainly stems from two sources: leakage at the main unit's breather and direct discharge of gas into the atmosphere during venting. Gas loss leads to increased costs and operational risks.

[0003] Existing gas recovery systems have two problems: firstly, the recovery process is prone to air intake, which leads to a decrease in the purity of the working gas; secondly, the system requires additional gas storage tanks, which increases construction and operating costs. Utility Model Content

[0004] This application provides a gas recovery system and a gas conveying device to solve related technical problems.

[0005] This application provides a gas recovery system for use in a gas conveying device, comprising: an inlet pipe, a leaked gas recovery pipe, and a vented gas recovery pipe; one end of the leaked gas recovery pipe is connected to the inlet pipe, and the other end is connected to the vent of the gas conveying device; one end of the vented gas recovery pipe is connected to the inlet pipe, and the other end is connected to the vent of the gas conveying device.

[0006] Furthermore, the leaked gas recovery pipeline is equipped with a gas collection pipe, which connects the breathing port and the air inlet pipeline.

[0007] Furthermore, the leaked gas recovery pipeline is equipped with a pressure sensor and a first normally closed solenoid valve, which is connected to the gas collection pipe and the gas inlet pipe respectively. The first normally closed solenoid valve is set with a first opening pressure value; when the pressure sensor detects that the pressure of the gas collection pipe is greater than the first opening pressure value, the first normally closed solenoid valve remains open.

[0008] Furthermore, the first normally closed solenoid valve is also provided with a closing pressure value. When the pressure sensor detects that the pressure in the gas collecting pipe is less than the closing pressure value, the second normally closed solenoid valve remains closed; the closing pressure value is less than the first opening pressure value.

[0009] Furthermore, the leaked gas recovery pipeline is equipped with a second normally closed solenoid valve, which is connected to the gas collection pipe and the gas inlet pipe respectively. The second normally closed solenoid valve is provided with a second opening pressure value; when the pressure sensor detects that the pressure of the gas collecting pipe is greater than the second opening pressure value, the second normally closed solenoid valve opens, and the second opening pressure value is greater than the first opening pressure value.

[0010] Furthermore, the leaked gas recovery pipeline is equipped with a leak check valve, which is connected to the gas collection pipe and the gas inlet pipe respectively.

[0011] Furthermore, the leakage check valve is unidirectionally connected from the air inlet pipe to the air collection pipe.

[0012] Furthermore, the vented gas recovery pipeline is equipped with a venting check valve, which is connected to the inlet pipeline and the venting pipeline respectively.

[0013] Furthermore, the vent check valve is unidirectionally connected from the vent pipeline to the intake pipeline.

[0014] This application also provides a gas conveying device, including the gas recovery system described above.

[0015] The gas recovery system of this application, by setting up leaked gas recovery pipelines and vented gas recovery pipelines, can recover gas leaked from the breathing port and gas vented through the venting pipeline, thereby reducing costs and ensuring personnel safety.

[0016] Furthermore, since the leaked gas recovery pipeline is directly connected to the breathing port and the air intake pipeline, and the vented gas recovery pipeline is directly connected to the vented pipeline and the air intake pipeline, there is no risk of air being introduced, ensuring the purity of the working gas. At the same time, there is no need to install an additional gas storage tank, reducing costs.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0019] Figure 1 This is a schematic diagram of a gas recovery system according to an exemplary embodiment of this application.

[0020] Reference numerals: 10 for intake pipe; 20 for leaked gas recovery pipe; 21 for gas collection pipe; 211 for breather connection pipe; 22 for pressure sensor; 23 for first normally closed solenoid valve; 24 for second normally closed solenoid valve; 25 for leak check valve; 30 for vented gas recovery pipe; 31 for vent check valve; 40 for intake valve. Detailed Implementation

[0021] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0022] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0023] To achieve gas recovery, current gas conveying devices partially incorporate gas recovery systems. Existing gas recovery systems suffer from two problems: firstly, the recovery process easily draws in air, leading to a decrease in the purity of the working gas; secondly, the system requires additional gas storage tanks, increasing construction and operating costs. This application provides a gas recovery system to solve these related technical problems.

[0024] like Figure 1 As shown, this application provides a gas recovery system applied to a gas conveying device. The gas recovery system includes an inlet pipe 10, a leaked gas recovery pipe 20, and a vented gas recovery pipe 30.

[0025] One end of the leaked gas recovery pipeline 20 is connected to the inlet pipeline 10, and the other end is connected to the vent of the gas delivery device. One end of the vented gas recovery pipeline 30 is connected to the inlet pipeline, and the other end is connected to the vent pipeline of the gas delivery device. One end of the inlet pipeline 10 is equipped with an inlet valve 40, and the other end is connected to the inlet of the working equipment. The inlet valve 40 controls the gas delivery device to deliver gas into the working equipment by opening and closing itself.

[0026] When the pressure of the working equipment reaches its upper limit, the gas delivery device will enter the unloading mode, the inlet valve 40 will close, the gas delivery device will release the working gas, and stop compressing and delivering the gas. At this time, the motor inside the gas delivery device will still drive the main unit to rotate. When loading is required later (i.e., when the gas delivery device needs to compress and deliver the gas again), simply open the inlet valve 40; there is no need to restart the entire gas delivery device.

[0027] The gas recovery system of this application, by setting up a leak gas recovery pipeline 20 and a vent gas recovery pipeline 30, can recover gas leaking from the breathing port and gas vented through the vent pipeline. This reduces costs and ensures personnel safety.

[0028] Furthermore, since the leaked gas recovery pipeline 20 is directly connected to the breathing port and the air intake pipeline 10, and the vented gas recovery pipeline is directly connected to the vented pipeline and the air intake pipeline 10, there is no risk of introducing air, ensuring the purity of the working gas. At the same time, there is no need to install an additional gas storage tank, reducing costs.

[0029] In one embodiment, the leaked gas recovery pipeline 20 is provided with a gas collecting pipe 21, and the gas collecting pipe 21 is provided with a breather connection pipe 211 for connecting the breather and the air inlet pipeline 10. This connection temporarily stores the leaked gas from the breather and subsequently delivers it to the air inlet pipeline 10 according to the specific conditions of the gas circuit. In other embodiments, the specific structural form of the leaked gas recovery pipeline 20 is not limited, as long as it can connect the air inlet pipeline 10 and the leaked gas recovery pipeline.

[0030] In one embodiment, the leaked gas recovery line 20 is equipped with a pressure sensor 22 and a first normally closed solenoid valve 23. The first normally closed solenoid valve 23 is connected to the gas collection pipe 21 and the gas inlet pipe 10. The first normally closed solenoid valve 23 is set with a first opening pressure value. When the pressure sensor 22 detects that the pressure in the gas collection pipe 21 is greater than the first opening pressure value, the first normally closed solenoid valve 23 remains open.

[0031] By setting a first normally closed solenoid valve 23, which only opens when the pressure in the gas collecting pipe 21 is too high, the gas collected in the gas collecting pipe 21 is then transported to the inlet pipe 10 when the amount of recovered gas reaches a certain level. This prevents the working gas in the inlet pipe 10 from leaking to the outside through the gas collecting pipe 21, thus ensuring the recovery efficiency of the gas recovery system.

[0032] In this embodiment, the first normally closed solenoid valve 23 may be set with a closing pressure value. When the pressure sensor 22 detects that the pressure in the gas collecting pipe 21 is less than the closing pressure value, the first normally closed solenoid valve 23 remains closed. The closing pressure value is less than the first opening pressure value.

[0033] In actual use, when gas is supplied from the gas collecting pipe 21 to the inlet pipe 10, the gas pressure inside the gas collecting pipe 21 will decrease. If the gas pressure in the gas collecting pipe 21 is lower than the first opening pressure value, the first normally closed solenoid valve 23 will immediately close, and the gas pressure inside the gas collecting pipe 21 will begin to rise again. When the gas pressure in the gas collecting pipe 21 is higher than the first opening pressure value, the first normally closed solenoid valve 23 will reopen, and this opening and closing process will repeat. Therefore, setting the closing pressure value to be lower than the first opening pressure value can prevent the first normally closed solenoid valve 23 from repeatedly opening and closing, ensuring the operational stability of the gas recovery system.

[0034] In one embodiment, the leaked gas recovery pipeline 20 is further provided with a second normally closed solenoid valve 24, which is connected to the gas collecting pipe 21 and the gas inlet pipe 10. The second normally closed solenoid valve 24 is provided with a second opening pressure value. When the pressure sensor 22 detects that the pressure in the gas collecting pipe 21 is greater than the second opening pressure value, the second normally closed solenoid valve 24 remains open. The second opening pressure value is greater than the first opening pressure value.

[0035] The second normally closed solenoid valve 24 serves a protective function. The first opening pressure value is the pressure value of the gas recovery system under normal operating conditions. Since the second opening pressure value is greater than the first opening pressure value, when the pressure in the gas collecting pipe 21 exceeds the second opening pressure value, it indicates that the pressure in the gas collecting pipe 21 is abnormal. By promptly opening the second normally closed solenoid valve 24, the gas delivery efficiency from the gas collecting pipe 21 to the inlet pipe 10 is increased, preventing damage to the gas collecting pipe 21 and improving the system stability of the gas recovery system.

[0036] In this embodiment, the gas recovery system may be equipped with corresponding alarm elements, such as alarm lights and alarm bells, to alert operators to any abnormal situations.

[0037] In one embodiment, the leaked gas recovery pipeline 20 is equipped with a leak check valve 25, which is connected to the gas collecting pipe 21 and the gas inlet pipe 10. The leak check valve 25 provides one-way communication from the gas inlet pipe 10 to the gas collecting pipe 21.

[0038] By setting a leakage check valve 25, when the gas conveying device is in unloading condition, the gas in the inlet pipe 10 enters the breathing port through the gas collecting pipe 21, maintaining the pressure of the breathing port and preventing the pressure of the breathing port from being lower than the pressure of the inlet pipe 10, thus preventing the lubricating oil in the gas conveying device from being drawn out by negative pressure, and further improving the stability of the gas recovery system.

[0039] In one embodiment, the vented gas recovery pipeline 30 is equipped with a venting check valve 31, which is connected to both the intake pipeline 10 and the venting pipeline. The venting check valve 31 provides one-way communication from the venting pipeline to the intake pipeline 10.

[0040] Because the gas temperature is high during venting, a venting check valve 31 is installed to ensure that the vented gas can only enter the inlet pipe 10 from the venting pipe, preventing high-temperature gas from repeatedly entering the gas delivery device and improving the safety of the gas recovery system. In other embodiments, the specific structure of the vented gas recovery pipe 30 is not limited.

[0041] This application also provides a gas delivery device, including the aforementioned gas recovery system. Because the gas recovery system ensures the purity of the working gas, the operating efficiency of the gas delivery device of this application is improved. At the same time, since no additional gas storage tank is required, the cost of the gas delivery device is reduced.

[0042] The gas delivery device can be a compressor. Specifically, in terms of the type of working gas, the gas delivery device can be an air compressor, a nitrogen compressor, or an argon compressor, etc. In terms of its own structure, the gas delivery device can be a single-stage screw compressor, a multi-stage screw compressor, etc. The specific type of gas delivery device is not limited. In other embodiments, the gas recovery system may not have an inlet valve 40, and the gas delivery device may be a frequency converter without an inlet valve 40.

[0043] It should be noted that the technical solutions or features described in the above embodiments can be combined or complemented by each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A gas recovery system, applied to a gas conveying device, characterized in that, include: Intake line, leaked gas recovery line and vented gas recovery line; One end of the leaked gas recovery pipeline is connected to the air inlet pipeline, and the other end is connected to the breathing port of the gas delivery device; one end of the vented gas recovery pipeline is connected to the air inlet pipeline, and the other end is connected to the vented pipeline of the gas delivery device.

2. The gas recovery system according to claim 1, characterized in that, The leaked gas recovery pipeline is equipped with a gas collection pipe, which connects the breathing port and the air inlet pipeline.

3. The gas recovery system according to claim 2, characterized in that, The leaked gas recovery pipeline is equipped with a pressure sensor and a first normally closed solenoid valve, which is connected to the gas collection pipe and the gas inlet pipe respectively. The first normally closed solenoid valve is set with a first opening pressure value; when the pressure sensor detects that the pressure of the gas collection pipe is greater than the first opening pressure value, the first normally closed solenoid valve remains open.

4. The gas recovery system according to claim 3, characterized in that, The first normally closed solenoid valve is also provided with a closing pressure value. When the pressure sensor detects that the pressure in the gas collection pipe is less than the closing pressure value, the first normally closed solenoid valve remains closed. The closing pressure value is less than the first opening pressure value.

5. The gas recovery system according to claim 3, characterized in that, The leaked gas recovery pipeline is equipped with a second normally closed solenoid valve, which is connected to the gas collection pipe and the gas inlet pipeline respectively. The second normally closed solenoid valve is provided with a second opening pressure value; when the pressure sensor detects that the pressure of the gas collection pipe is greater than the second opening pressure value, the second normally closed solenoid valve remains open, and the second opening pressure value is greater than the first opening pressure value.

6. The gas recovery system according to claim 2, characterized in that, The leaked gas recovery pipeline is equipped with a leak check valve, which is connected to the gas collection pipe and the gas inlet pipe respectively.

7. The gas recovery system according to claim 6, characterized in that, The leakage check valve is unidirectionally connected from the air inlet pipe to the air collection pipe.

8. The gas recovery system according to claim 1, characterized in that, The vented gas recovery pipeline is equipped with a venting check valve, which is connected to the inlet pipeline and the venting pipeline respectively.

9. The gas recovery system according to claim 8, characterized in that, The venting check valve is unidirectionally connected from the venting pipeline to the intake pipeline.

10. A gas conveying device, characterized in that, include: The gas recovery system as described in any one of claims 1-9.

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