A device for recovering and utilizing flammable gas

Abstract

This utility model relates to the field of recycling devices and discloses a device for recovering and utilizing flared gas. It includes a working pipe section and an operating pipe section. A fixed pipe is fixedly connected to one side of both the working and operating pipe sections. A collection structure is provided on one side of the fixed pipe. The collection structure includes a first flexible hose, one end of which is fixedly connected to a first collecting pipe. A first connecting pipe is fixedly connected to one side of the first collecting pipe. A second collecting pipe is fixedly connected to the first connecting pipe, and a second flexible hose is fixedly connected to the second collecting pipe. A filter, an air compressor, a pressure regulator, and a flow meter are sequentially fixedly connected to the end of the first connecting pipe near the first collecting pipe. In this utility model, through the collection structure, pipeline connections, and valve control of gas flow, the air compressor pressurizes the gas, the pressure regulator adjusts the pressure, and the flow meter measures the flow, allowing the pressurized flared gas to be sent to the operating pipe section for reuse, thereby improving energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of recycling devices, and in particular to a device for recycling flared gas. Background Technology

[0002] Gas pipeline construction refers to a series of engineering operations carried out to construct, renovate, repair or dismantle urban gas transmission pipelines and ancillary facilities. Before gas pipeline construction, the natural gas in the pipeline needs to be released in order to eliminate safety hazards during construction, ensure the personal safety of construction personnel, and meet construction technical requirements.

[0003] The existing venting methods generally involve burning the natural gas in the pipeline directly with a venting gun or releasing it directly into the atmosphere. This method not only wastes natural gas and results in low energy efficiency, but also causes air pollution, which does not meet the requirements of environmental protection policies.

[0004] Therefore, those skilled in the art have provided a device for recovering and utilizing vented gas to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a vented gas recovery and utilization device. It is equipped with a collection structure that can recover and utilize natural gas that should be vented. By collecting and pressurizing the vented gas, it can be reinjected into the normally operating pipeline network for utilization, thereby improving the utilization rate of natural gas. It is also equipped with a disassembly structure that allows for quick installation and disassembly of the collection structure, adapting to the natural gas recovery and utilization of various gas pipeline links, and improving the ease of use of the device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A device for recovering and utilizing flammable gas includes a working pipe section and an operating pipe section, which are connected through a vent valve. A fixed pipe is fixedly connected to one side of both the working pipe section and the operating pipe section. A collection structure is provided on one side of the fixed pipe. A disassembly structure is provided inside the fixed pipe. The fixed pipe is engaged and fixed with the collection structure through the disassembly structure. The collection structure includes a first hose located on one side of the working pipe section. One end of the first hose is fixedly connected to a first collection pipe. One side of the first collection pipe is fixedly connected to a first connecting pipe. The end of the first connecting pipe away from the first collection pipe is fixedly connected to a second collection pipe. The end of the second collection pipe away from the first connecting pipe is fixedly connected to a second hose. One end of both the first hose and the second hose is fixedly connected to a connecting seat. The end of the first connecting pipe near the first collection pipe is sequentially fixedly connected to a filter, an air compressor, a pressure regulator, and a flow meter. By using the above technical solution and setting up a collection structure, the vented gas in the operating section can be collected through the first collection pipe and enter the first connecting pipe. A filter is used to remove impurities from the gas. An air compressor pressurizes the gas to the appropriate pressure. A pressure regulator further calibrates the pressure to the normal operating pressure of the operating section. A flow meter measures the amount of recovered gas in real time. Finally, the gas is injected into the operating section through the second collection pipe and the second hose, realizing the recycling of vented gas and reducing energy waste and environmental pollution.

[0007] Furthermore, the disassembly structure includes two compression grooves located inside the fixed tube. A compression spring is installed inside the compression groove. One end of the compression spring is fixedly connected to the fixed tube, and the other end of the compression spring is fixedly connected to a limit ring. A fixing rod is fixedly connected to the inner side of the limit ring. An annular block is fixedly connected to one end of the connecting seat. Two fixing grooves are provided on the outer side of the annular block. The fixing rod engages with the fixing grooves for fixation. By using the above technical solution, a disassembly structure is set up. After the annular block is inserted into the fixed tube, the compression spring pushes the limiting ring to drive the fixed rod into the fixed groove. Pulling the fixed rod to disengage it from the fixed groove allows the connecting seat to be unlocked and removed. This enables quick assembly and disassembly of the collection structure and the fixed tube, improving the adaptability and maintenance efficiency of the device in different operating scenarios.

[0008] Furthermore, a second valve and a fifth valve are fixedly connected to both ends of the first collecting pipe, and a venting pipe is fixedly connected to the end of the first collecting pipe away from the first flexible hose. By using the above technical solution, the second and fifth valves are set to regulate the flow of gas in the first collection pipe, and the vent pipe is set to release the gas in the pipe in a directional manner, so as to avoid the pipeline rupture caused by excessive pressure and improve the safety of operation.

[0009] Furthermore, a second connecting pipe is fixedly connected to one side of the first collecting pipe, and an inert gas cylinder is fixedly connected to the end of the second connecting pipe away from the first collecting pipe. The above technical solution involves setting up an inert gas cylinder, allowing the inert gas to enter the first collection pipe through the second connecting pipe, and then flow into the working pipe section. This dilutes and discharges residual air in the pipe, preventing the gas from mixing with air to form a flammable and explosive mixture. After the recovery is completed, the inert gas is injected again to completely remove residual gas in the pipe, providing a safe environment for subsequent construction and meeting the pipeline safety replacement requirements before operation.

[0010] Furthermore, a third valve is fixedly connected to the outside of the second collecting pipe, and the second collecting pipe and the first collecting pipe are connected through the third connecting pipe. A sixth valve is fixedly connected to the outside of the third connecting pipe. The above technical solution involves setting a third valve to control the on / off state of the gas recovery injection into the operating pipeline. When the pressure regulator malfunctions or the first connecting pipe needs maintenance, the relevant valves are closed and the sixth valve is opened. The gas in the first collecting pipe can be directly introduced into the second collecting pipe through the third connecting pipe, ensuring that the recovery process is not interrupted. At the same time, the pressure of the first collecting pipe and the second collecting pipe can be balanced by adjusting the opening of the sixth valve to avoid a sudden increase in local pressure.

[0011] Furthermore, one end of the fixed tube is provided with an annular groove, and an annular block slides inside the annular groove; By using the above technical solution, the annular groove can guide and limit the annular block, improve the accuracy of the connection between the connector and the fixed pipe, and enable the fixed rod to quickly align with the fixed groove to complete the engagement, thereby improving the convenience of the installation operation.

[0012] Furthermore, a sealing ring is provided inside the annular groove; By using the above technical solution, a sealing ring can be set to fill the gap between the annular block and the annular groove, preventing gas leakage at the connection point, improving the safety of the work site, reducing gas loss, and improving the efficiency of recycling.

[0013] Furthermore, a first valve and a fourth valve are respectively fixedly connected to the outside of the two fixed pipes; The above technical solution involves setting a first valve to control the flow of vented gas from the working pipeline to the fixed pipeline, and setting a fourth valve to control the flow of recovered gas from the fixed pipeline to the operating pipeline. When the pressure in the operating pipeline is unstable, closing the fourth valve can suspend the injection, thus avoiding affecting the normal operation of the pipeline network and improving the flexibility and safety of the device operation.

[0014] This utility model has the following beneficial effects: 1. This utility model proposes a device for recovering and utilizing flammable gas. By setting up a collection structure, using a first hose and a second hose connected to a fixed pipe via a connecting seat, flammable gas in the working section is introduced into the first collection pipe, purified by a filter, pressurized by an air compressor, regulated by a pressure regulator, and measured by a flow meter. The pressurized flammable gas is then transported to the operating section for reuse through the second collection pipe and the second hose, reducing energy waste and environmental pollution, and improving energy utilization. The flammable pipe on the first collection pipe allows for safe flammation in special circumstances. The inert gas cylinder connected to the second connecting pipe allows for the introduction of inert gas to replace the air in the pipeline before operation, improving operational safety.

[0015] 2. The present invention proposes a gas recovery and utilization device. By setting up a disassembly structure, the annular block is initially positioned and limited by an annular groove. The fixing rod is inserted into the fixing groove by a compression spring and a limiting ring, and the connecting seat is fixedly connected to the fixing pipe. Pulling the fixing rod to disengage it from the fixing groove allows the connecting seat to be unlocked and removed, facilitating maintenance and replacement of the collection structure. The sealing ring in the annular groove improves the sealing performance of the connection, prevents gas leakage, improves the versatility and flexibility of the equipment, reduces the installation and commissioning costs at the work site, and improves the efficiency of installation and maintenance. Attached Figure Description

[0016] Figure 1 This is a perspective view of a device for recovering and utilizing flared gas according to the present invention; Figure 2 This is an isometric view of a vented gas recovery and utilization device proposed in this utility model; Figure 3 This is a sectional view of the disassembled structure of a gas recovery and utilization device proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of a gas recovery and utilization device proposed in this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Working pipe section; 2. Operating pipe section; 3. Vent valve; 4. Fixed pipe; 5. Collection structure; 501. First hose; 502. Connecting seat; 503. First collection pipe; 504. First connecting pipe; 505. Second collection pipe; 506. Second hose; 507. Second valve; 508. Third valve; 509. Filter; 510. Air compressor; 511. Pressure regulator; 512. Flow meter; 513. Fifth valve; 514. Vent pipe; 515. Second connecting pipe; 516. Inert gas cylinder; 517. Third connecting pipe; 518. Sixth valve; 6. Disassembly structure; 601. Compression groove; 602. Compression spring; 603. Limiting ring; 604. Fixing rod; 7. Annular block; 8. Fixing groove; 9. Sealing ring; 10. Annular groove; 11. First valve; 12. Fourth valve. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figure 1-3 This utility model provides a specific implementation method: A device for recovering and utilizing flammable gas includes a working pipe section 1 and an operating pipe section 2, which are connected through a vent valve 3. A fixed pipe 4 is fixedly connected to one side of both the working pipe section 1 and the operating pipe section 2. A collection structure 5 is provided on one side of the fixed pipe 4, and a disassembly structure 6 is provided inside the fixed pipe 4. The fixed pipe 4 is engaged and fixed to the collection structure 5 through the disassembly structure 6. The collection structure 5 includes a first flexible hose 501 located on one side of the working pipe section 1. A first collection pipe 503 is fixedly connected to one end of the first flexible hose 501. A first connecting pipe 504 is fixedly connected to one side of the first collection pipe 503, and a second collection pipe 505 is fixedly connected to the end of the first connecting pipe 504 away from the first collection pipe 503. A second hose 506 is fixedly connected to the end of the second collecting pipe 505 furthest from the first connecting pipe 504. A connecting seat 502 is fixedly connected to one end of both the first hose 501 and the second hose 506. A filter 509, an air compressor 510, a pressure regulator 511, and a flow meter 512 are sequentially fixedly connected to the end of the first connecting pipe 504 closest to the first collecting pipe 503. The collecting structure 5 allows vented gas in the operating pipe section 1 to enter the first connecting pipe 504 via the first collecting pipe 503. The filter 509 removes impurities from the gas, the air compressor 510 pressurizes the gas to a suitable pressure, the pressure regulator 511 further calibrates the pressure to the normal operating pressure of the operating pipe section 2, and the flow meter 512 measures the amount of recovered gas in real time. The gas is injected into the operating pipe section 2 through the second collection pipe 505 and the second hose 506 to achieve the recycling of the released gas, reducing energy waste and environmental pollution. The two ends of the first collection pipe 503 are fixedly connected to a second valve 507 and a fifth valve 513, respectively. The end of the first collection pipe 503 furthest from the first hose 501 is fixedly connected to a vent pipe 514. The second valve 507 and the fifth valve 513 are used to regulate the flow of gas within the first collection pipe 503. The vent pipe 514 allows for the directional release of gas, preventing excessive pressure from causing pipe rupture and improving operational safety. A second connecting pipe 515 is fixedly connected to one side of the first collection pipe 503. The end of the second connecting pipe 515 furthest from the first collection pipe 503 is fixedly connected to... An inert gas cylinder 516 is provided. Inert gas is introduced into the first collecting pipe 503 via the second connecting pipe 515, and then flows into the operating pipe section 1. This dilutes and removes residual air from the pipe, preventing the gas from mixing with air to form a flammable and explosive mixture. After recovery, inert gas is injected again to completely remove residual gas from the pipe, providing a safe environment for subsequent construction and meeting the pipeline safety replacement requirements before operation. A third valve 508 is fixedly connected to the outside of the second collecting pipe 505. The second collecting pipe 505 and the first collecting pipe 503 are connected through a third connecting pipe 517. A sixth valve 518 is fixedly connected to the outside of the third connecting pipe 517. The third valve 508 controls the on / off flow of the recovered gas into the operating pipe section 2.When the pressure regulator 511 malfunctions or the first connecting pipe 504 needs maintenance, after closing the relevant valves, open the sixth valve 518. This allows the gas in the first collecting pipe 503 to be directly introduced into the second collecting pipe 505 through the third connecting pipe 517, ensuring an uninterrupted recovery process. Simultaneously, adjusting the opening of the sixth valve 518 can balance the pressure between the first collecting pipe 503 and the second collecting pipe 505, preventing sudden increases in local pressure.

[0020] Reference Figure 3-5 The disassembly structure 6 includes two compression grooves 601 located inside the fixed tube 4. A compression spring 602 is installed inside each compression groove 601. One end of the compression spring 602 is fixedly connected to the fixed tube 4, and the other end is fixedly connected to a limit ring 603. A fixing rod 604 is fixedly connected to the inner side of the limit ring 603. An annular block 7 is fixedly connected to one end of the connecting seat 502. Two fixing grooves 8 are provided on the outer side of the annular block 7. The fixing rod 604 engages with the fixing grooves 8. With the disassembly structure 6, after inserting the annular block 7 into the fixed tube 4, the compression spring 602 pushes the limit ring 603, causing the fixing rod 604 to engage in the fixing grooves 8. Pulling the fixing rod 604 disengages it from the fixing grooves 8, allowing the connecting seat 502 to be unlocked and removed. This enables quick disassembly and assembly of the collecting structure 5 and the fixed tube 4, improving the adaptability and maintenance efficiency of the device in different operating scenarios. One end of the fixed tube 4 is provided with an annular groove 10. An annular block 7 slides inside the connector 10, and an annular groove 10 is provided to guide and limit the annular block 7, improving the accuracy of the docking between the connector 502 and the fixed pipe 4, so that the fixed rod 604 can quickly align with the fixed groove 8 to complete the engagement, improving the convenience of installation. A sealing ring 9 is provided inside the annular groove 10 to fill the gap between the annular block 7 and the annular groove 10, preventing gas leakage at the connection, improving the safety of the work site, reducing gas loss, and improving the efficiency of recycling. A first valve 11 and a fourth valve 12 are fixedly connected to the outside of the two fixed pipes 4, respectively. The first valve 11 controls the on / off supply of vented gas from the working pipe section 1 to the fixed pipe 4, and the fourth valve 12 controls the on / off supply of recovered gas from the fixed pipe 4 to the operating pipe section 2. When the pressure of the operating pipe section 2 is unstable, closing the fourth valve 12 can stop the injection, avoiding affecting the normal operation of the pipeline network and improving the flexibility and safety of the device operation.

[0021] Working principle: When using this vented gas recovery and utilization device, first insert the annular block 7 at one end of the connecting seat 502 into the annular groove 10 of the fixed pipe 4. At this time, the compression spring 602 pushes the fixing rod 604 into the fixing groove 8, so that the connecting seat 502 and the fixed pipe 4 are fixedly connected, and the collecting structure 5 is firmly fixed together with the working pipe section 1 and the running pipe section 2. When maintenance is required on the collecting structure 5, the operation is reversed, and the sealing ring 9 is used to strengthen the seal. Then, the vent valve 3 is closed, and the first valve 11 and the second valve 507 are opened. The vented gas in the working pipe section 1 enters the first collecting pipe 503 through the first hose 501, and then flows into the first connecting pipe 504. After impurities are filtered out by filter 509, pressurized by air compressor 510, regulated by pressure regulator 511, and metered by flow meter 512, the gas enters the second collection pipe 505. Then, the third valve 508 and the fourth valve 12 are opened, and the recovered gas is injected into the operating pipe section 2 through the second hose 506. If the pressure regulator 511 fails, the relevant valves can be closed and the sixth valve 518 can be opened to achieve direct gas supply through the third connecting pipe 517. When the device is over-pressurized, the fifth valve 513 is opened and the vent pipe 514 is used to release the pressure. After the recovery is completed, the inert gas cylinder 516 is opened, and the inert gas enters the working pipe section 1 through the second connecting pipe 515 to complete the replacement and prepare for subsequent construction.

[0022] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0023] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for recovering and utilizing flammable gas, comprising a working pipe section (1) and an operating pipe section (2), characterized in that: The working pipe section (1) and the running pipe section (2) are connected through a vent valve (3). A fixed pipe (4) is fixedly connected to one side of both the working pipe section (1) and the running pipe section (2). A collection structure (5) is provided on one side of the fixed pipe (4). A disassembly structure (6) is provided inside the fixed pipe (4). The fixed pipe (4) is engaged and fixed with the collection structure (5) through the disassembly structure (6). The collection structure (5) includes a first hose (501), which is located on one side of the working pipe section (1). One end of the first hose (501) is fixedly connected to a first collection pipe (503). One side of the first collection pipe (503) is fixedly connected to a first connecting pipe (504). One end of the first connecting pipe (504) away from the first collection pipe (503) is fixedly connected to a second collection pipe (505). One end of the second collection pipe (505) away from the first connecting pipe (504) is fixedly connected to a second hose (506). One end of the first hose (501) and the second hose (506) are both fixedly connected to a connecting seat (502). One end of the first connecting pipe (504) near the first collection pipe (503) is sequentially fixedly connected to a filter (509), an air compressor (510), a pressure regulator (511), and a flow meter (512).

2. The vented gas recovery and utilization device according to claim 1, characterized in that: The disassembly structure (6) includes two compression grooves (601). The compression grooves (601) are located inside the fixed tube (4). A compression spring (602) is provided inside the compression groove (601). One end of the compression spring (602) is fixedly connected to the fixed tube (4). The other end of the compression spring (602) is fixedly connected to a limit ring (603). A fixing rod (604) is fixedly connected to the inner side of the limit ring (603). An annular block (7) is fixedly connected to one end of the connecting seat (502). Two fixing grooves (8) are provided on the outer side of the annular block (7). The fixing rod (604) engages with the fixing grooves (8) for fixation.

3. The vented gas recovery and utilization device according to claim 1, characterized in that: The first collecting pipe (503) is fixedly connected to the second valve (507) and the fifth valve (513) at both ends, and the first collecting pipe (503) is fixedly connected to the venting pipe (514) at the end away from the first hose (501).

4. The vented gas recovery and utilization device according to claim 1, characterized in that: A second connecting pipe (515) is fixedly connected to one side of the first collecting pipe (503), and an inert gas cylinder (516) is fixedly connected to the end of the second connecting pipe (515) away from the first collecting pipe (503).

5. The vented gas recovery and utilization device according to claim 1, characterized in that: The second collecting pipe (505) is externally fixedly connected to a third valve (508), and the second collecting pipe (505) and the first collecting pipe (503) are connected through a third connecting pipe (517). The third connecting pipe (517) is externally fixedly connected to a sixth valve (518).

6. The vented gas recovery and utilization device according to claim 1, characterized in that: One end of the fixed tube (4) is provided with an annular groove (10), and an annular block (7) slides inside the annular groove (10).

7. The vented gas recovery and utilization device according to claim 6, characterized in that: A sealing ring (9) is provided inside the annular groove (10).

8. The vented gas recovery and utilization device according to claim 1, characterized in that: The two fixed pipes (4) are respectively fixedly connected to the outside of the first valve (11) and the fourth valve (12).

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