Quick-release temporary gas dispersion displacement tool

Abstract

The utility model provides a kind of quick-release type temporary gas diffusion replacement tool, it is specifically related to gas replacement operation technical field, to solve the many shortcomings of existing diffusion replacement device still have.This device includes diffusion pipe and injection pile, diffusion pipe includes the first thick-walled pipeline of vertical setting and top end opening, the lower portion of first thick-walled pipeline is equipped with L type thick-walled pipeline, and both are detachably connected by first high-pressure locking quick connector;L type thick-walled pipeline's cross pipe outer end and gas facilities connection port are detachably connected by second high-pressure locking quick connector;Injection pile includes the second thick-walled pipeline of one end plugging, its surface is equipped with multiple outer ends and is equipped with the first high-pressure needle valve of first branch pipe, first high-pressure needle valve is used to connect inert gas gas source;Second thick-walled pipeline one end and gas facilities connection port are detachably connected by second high-pressure locking quick connector.This device can effectively solve the shortcomings of existing diffusion replacement device.

Description

Technical Field

[0001] This utility model relates to the field of gas replacement operation technology, and more specifically, to a quick-release temporary gas venting and replacement tool. Background Technology

[0002] With the increasing number of urban gas users, the underground gas pipeline network in cities is constantly extending, leading to a rise in new construction, renovation, and maintenance projects. Therefore, gas replacement work, as a high-risk operation in municipal gas construction, is becoming more frequent and carries greater risks. Gas replacement work is a process used to prevent safety hazards arising from hot work operations (equipment connections, modifications, or repairs that may produce flames, sparks, or hot surfaces) in gas facilities. Types include direct replacement and indirect replacement. Indirect replacement refers to directly replacing the air in a gas facility with gas, or replacing the gas in a gas facility with air. Indirect replacement also involves first replacing the air in a gas facility with an inert gas, and then replacing the inert gas with gas; or replacing the gas in a gas facility with an inert gas, and then replacing the inert gas with air.

[0003] Indirect replacement operations require a venting replacement device, which includes an injection tool and a venting tool. Before use, the first and last ends of the gas outage area should be selected as the injection and venting points, preferably using the connection ports located inside the gas outage valves. After completing the necessary preparations, the injection and venting tools are installed at the injection and venting points respectively, and then used in conjunction to perform the replacement operation.

[0004] However, existing venting and replacement devices still have many shortcomings, including: 1. Existing venting and replacement devices have complex structures and lack quick-release functions, making installation time-consuming and laborious for workers; 2. In the event of a gas source failure or emergency, the injection tool cannot quickly switch to a backup gas source, which lacks safety. Utility Model Content

[0005] The purpose of this invention is to provide a quick-release temporary gas venting and replacement tool, which can effectively solve the shortcomings of existing venting and replacement devices.

[0006] The embodiments of this utility model are achieved through the following technical solutions:

[0007] A quick-release temporary gas venting and replacement tool includes a venting pipe and an injection pile. The venting pipe includes a vertically arranged first thick-walled pipe with an open top. Below the first thick-walled pipe is an L-shaped thick-walled pipe. The bottom end of the first thick-walled pipe and the top end of the vertical pipe of the L-shaped thick-walled pipe are detachably connected via a first high-pressure locking quick connector. The outer end of the horizontal pipe of the L-shaped thick-walled pipe is detachably connected to the existing gas facility's connection port via a second high-pressure locking quick connector. The injection pile includes a second thick-walled pipe with one end sealed. The second thick-walled pipe has multiple first branch pipes. The outer end of each first branch pipe is equipped with a first high-pressure needle valve. The first high-pressure needle valve is detachably connected to an inert gas source via a metal hose. The other end of the second thick-walled pipe is detachably connected to the existing gas facility's connection port via a second high-pressure locking quick connector.

[0008] In some embodiments, a plurality of third thick-walled pipes are connected between the bottom end of the first thick-walled pipe and the top end of the vertical pipe of the L-shaped thick-walled pipe; the bottom end of the first thick-walled pipe is provided with the female head of the first high-pressure locking quick connector, and the top end of the vertical pipe of the L-shaped thick-walled pipe is provided with the male head of the first high-pressure locking quick connector; the upper and lower ends of each third thick-walled pipe are respectively provided with the male head and female head of the first high-pressure locking quick connector.

[0009] In some embodiments, a first pressure gauge is detachably connected to the outer end of the first high-pressure needle valve on one of the first branch pipes.

[0010] In some embodiments, a mechanical thermometer is detachably connected to the outer end of the first high-pressure needle valve on one of the first branch pipes.

[0011] In some embodiments, the vertical pipe of the L-shaped thick-walled pipe is provided with two second branch pipes, and the outer end of each second branch pipe is provided with a second high-pressure needle valve; the outer end of one of the second high-pressure needle valves is detachably connected to a second pressure gauge; the outer end of the other second high-pressure needle valve serves as a displacement concentration test port.

[0012] In some embodiments, a flame arrester is provided on the horizontal section of the L-shaped thick-walled pipe.

[0013] In some embodiments, the horizontal section of the L-shaped thick-walled pipe is provided with a metal ring to prevent static electricity buildup.

[0014] In some embodiments, a folding bracket is provided on the vertical pipe of the L-shaped thick-walled pipe. The folding bracket includes a plurality of support rods that are evenly distributed around the outer periphery of the vertical pipe of the L-shaped thick-walled pipe. The top end of the support rod is hinged to the outer wall of the vertical pipe of the L-shaped thick-walled pipe. A limiting rod is also provided on the inner side of each support rod. One end of the limiting rod is rotatably connected to the support rod, and the other end of the limiting rod is rotatably connected to the outer wall of the vertical pipe of the L-shaped thick-walled pipe.

[0015] In some embodiments, the outer wall of the vertical pipe of the L-shaped thick-walled pipe is provided with a pull rope hole for preventing tipping, and the pull rope hole is located above the folding bracket.

[0016] In some embodiments, both the horizontal pipe of the L-shaped thick-walled pipe and the second thick-walled pipe are respectively provided with ball valves near the second high-pressure locking quick connector.

[0017] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0018] 1. In terms of installation efficiency, this device achieves tool-free quick connection of various components through high-pressure locking quick couplings. Combined with a modular and removable pipeline structure, it significantly shortens the installation time and is more efficient than traditional solutions, saving workers time and effort.

[0019] 2. In terms of safety, this device features a multi-gas source parallel access system and independent needle valve control, enabling rapid gas source switching to address main gas source failures. The design of flame arresters, anti-static metal rings, and folding supports reduces the risks of fire, static electricity, and tipping. Furthermore, ball valve-assisted disassembly and rigorous airtightness testing further enhance operational safety, comprehensively addressing the pain points of existing devices. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the vent pipe of a quick-release temporary gas venting and replacement tool provided in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the injection pile of a quick-release temporary gas venting and replacement tool provided in an embodiment of the present invention.

[0023] Icons: 1. First thick-walled pipe; 2. L-shaped thick-walled pipe; 3. Gas facility with built-in connection port; 4. Second thick-walled pipe; 5. First branch pipe; 6. First high-pressure needle valve; 7. Third thick-walled pipe; 8. First high-pressure locking quick connector; 9. Second high-pressure locking quick connector; 10. First pressure gauge; 11. Mechanical thermometer; 12. Second branch pipe; 13. Second high-pressure needle valve; 14. Second pressure gauge; 15. Displacement concentration test port; 16. Flame arrester; 17. Metal ring; 18. Support rod; 19. Limiting rod; 20. Pull rope hole; 21. Ball valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Please see Figures 1-2 As shown, the main body of this embodiment is a quick-release temporary gas venting and replacement tool, including a venting pipe and an injection pile. The venting pipe includes a vertically arranged first thick-walled pipe 1 with an open top. An L-shaped thick-walled pipe 2 is arranged below the first thick-walled pipe 1. The bottom end of the first thick-walled pipe 1 and the top end of the vertical pipe of the L-shaped thick-walled pipe are detachably connected through a first high-pressure locking quick connector 8. The outer end of the horizontal pipe of the L-shaped thick-walled pipe 2 is detachably connected to the existing gas facility's built-in connection port 3 through a second high-pressure locking quick connector 9. The injection pile includes a second thick-walled pipe 4 with one end sealed. Multiple first branch pipes 5 are arranged on the second thick-walled pipe 4. The outer end of each of the first branch pipes 5 is provided with a first high-pressure needle valve 6. The first high-pressure needle valve 6 is detachably connected to an inert gas source through a metal hose. The other end of the second thick-walled pipe 4 is detachably connected to the existing gas facility's built-in connection port 3 through a second high-pressure locking quick connector 9.

[0030] Furthermore, several third thick-walled pipes 7 are connected between the bottom end of the first thick-walled pipe 1 and the top end of the vertical pipe of the L-shaped thick-walled pipe; the bottom end of the first thick-walled pipe 1 is provided with the female head of the first high-pressure locking quick connector 8, and the top end of the vertical pipe of the L-shaped thick-walled pipe is provided with the male head of the first high-pressure locking quick connector 8; the upper and lower ends of each third thick-walled pipe 7 are respectively provided with the male head and female head of the first high-pressure locking quick connector 8.

[0031] Furthermore, a first pressure gauge 10 is detachably connected to the outer end of the first high-pressure needle valve 6 on one of the first branch pipes 5.

[0032] Furthermore, a mechanical thermometer 11 is detachably connected to the outer end of the first high-pressure needle valve 6 on one of the first branch pipes 5.

[0033] Furthermore, the vertical pipe of the L-shaped thick-walled pipe 2 is provided with two second branch pipes 12, and each second branch pipe 12 is provided with a second high-pressure needle valve 13 at its outer end; one of the second high-pressure needle valves 13 is detachably connected to a second pressure gauge 14 at its outer end; the other second high-pressure needle valve 13 serves as a displacement concentration test port 15.

[0034] Furthermore, a flame arrester 16 is provided on the horizontal pipe of the L-shaped thick-walled pipe 2.

[0035] Furthermore, the horizontal pipe of the L-shaped thick-walled pipe 2 is provided with a metal ring 17 for preventing static electricity buildup.

[0036] Furthermore, a folding bracket is provided on the vertical pipe of the L-shaped thick-walled pipe. The folding bracket includes a plurality of support rods 18 that are evenly distributed around the outer periphery of the vertical pipe of the L-shaped thick-walled pipe. The top end of the support rod 18 is hinged to the outer wall of the vertical pipe of the L-shaped thick-walled pipe. A limiting rod 19 is also provided on the inner side of each support rod 18. One end of the limiting rod 19 is rotatably connected to the support rod 18, and the other end of the limiting rod 19 is rotatably connected to the outer wall of the vertical pipe of the L-shaped thick-walled pipe.

[0037] Furthermore, the outer wall of the vertical pipe of the L-shaped thick-walled pipe is provided with a rope hole 20 for preventing tipping, and the rope hole 20 is located above the folding bracket.

[0038] Furthermore, both the horizontal pipe of the L-shaped thick-walled pipe and the second thick-walled pipe 4 are equipped with ball valves 21 near the second high-pressure locking quick connector 9.

[0039] In this device, high-pressure cam-locking quick connectors are used between the vent pipe and the L-shaped thick-walled pipe (first high-pressure locking quick connector 8) and between the L-shaped thick-walled pipe and the gas facility (second high-pressure locking quick connector 9). These connectors achieve tool-free quick connection through a cam mechanism, and can complete docking or disconnection in a very short time, which greatly improves efficiency compared to traditional threaded connections, thus realizing the quick-disassembly function of the venting and replacement device.

[0040] Secondly, the vent pipe in this device adopts a three-section structure of "first thick-walled pipe 1 + third thick-walled pipe 7 + L-shaped thick-walled pipe", with each section connected by a first high-pressure locking quick connector 8. When it is necessary to adapt to gas facility connection ports of different heights, the total height of the vent pipe can be quickly adjusted by increasing or decreasing the number of third thick-walled pipes 77 (each third thick-walled pipe 7 has male and female heads of the first high-pressure locking quick connector 8 at both ends), without the need for customized processing. Thus, the modular design shortens the installation time and is suitable for different vent height requirements.

[0041] In addition, 4-6 first branch pipes 5 are installed on the second thick-walled pipe 4 of the injection pile, each branch pipe being independently connected to an inert gas source (such as a nitrogen cylinder). When the main gas source experiences an abnormal pressure, the first high-pressure needle valve 6 of the first branch pipe 5 can be immediately closed, while the valves of other first branch pipes 5 connected to backup gas sources can be opened, thus completing the gas source switchover. This design is similar to the instrument gas source switching device in the chemical industry, achieving redundancy backup through multi-branch valve control, thereby solving the technical problem of not being able to quickly switch over in case of gas source failure.

[0042] It is worth mentioning that this device incorporates ball valves 21 near both the L-shaped thick-walled pipe and the injection pile near the quick-connect fitting. Closing the ball valves 21 before disassembly cuts off the gas flow, avoiding the risk of gas splashing due to residual pressure, as is common in traditional solutions. For example, in natural gas replacement operations, the ball valves 21 can reduce the pressure inside the pipeline to a safe range before the quick-connect fitting is disconnected, and combined with the automatic sealing function of the quick-connect fitting, achieve safe and rapid disassembly.

[0043] It is worth mentioning that this device displays the gas source pressure in real time by installing a first pressure gauge 10 on one of the first branch pipes 5 of the injection pile. When the pressure is lower than the gas replacement safety threshold, an alarm can be triggered and the device can automatically switch to the backup gas source. This device monitors the inert gas temperature by connecting a mechanical thermometer 11 to the other first branch pipe 5 of the injection pile. If the temperature is abnormal, the gas source can be switched in advance to prevent the pipeline from freezing. This device sets a replacement concentration test port 15 on the second branch pipe 12 of the L-shaped thick-walled pipeline, and analyzes the composition of the released gas in real time with a portable detector to ensure that the gas / inert gas ratio meets the safety standards during the replacement process.

[0044] It is worth mentioning that this device is equipped with a flame arrester 16 on the horizontal L-shaped thick-walled pipe, which can effectively prevent the spread of backfire flames. At the same time, an anti-static metal ring 17 is installed on the outer wall of the horizontal pipe, and static electricity is conducted to the ground through a grounding wire to avoid static electricity accumulation that could lead to an explosion.

[0045] It is worth mentioning that this device achieves vertical support for the venting pipe by setting multiple folding support rods 18 on the L-shaped thick-walled pipe vertical section and using limiting rods 19 to achieve rigid support in the unfolded state. In addition, this device enhances wind resistance by setting rope holes 20 and forming a triangular stable structure with ground anchors and steel wire ropes, ensuring that the venting pipe does not tip over during the replacement process.

[0046] Specific instructions for using this device:

[0047] 1. Site planning

[0048] Clear obstacles from the work area according to the injection and venting points marked on the drawings. No open flames are permitted within 5 meters of the venting points, and warning barriers should be erected at the injection points. Connect the anti-static grounding wire to the metal ring 17 of the L-shaped thick-walled pipe in advance.

[0049] 2. Component Inspection

[0050] Verify the integrity of each of the following: the first thick-walled vent pipe 1, the L-shaped thick-walled pipe, the third thick-walled pipe 7, the injection piles (the second thick-walled pipe 4, the first branch pipe 5), and the auxiliary accessories (the first high-pressure locking quick connector 8, the second high-pressure locking quick connector 9, the needle valve, the ball valve 21, etc.). Pay particular attention to confirming that the cam mechanism of the quick connector is free from jamming, the sealing gaskets are undamaged, and the valves open and close flexibly.

[0051] 3. Gas source configuration

[0052] Preparation before connecting the gas source: Before connecting the gas source, carefully check the sealing of the main inert gas source (such as a nitrogen cylinder), the backup gas source valve, and the metal hose to ensure there are no gas leaks. At the same time, use a calibrated pressure testing device to pre-check the cylinder pressure to ensure the initial pressure is within the normal range.

[0053] Based on the replacement scale, select one of the first branch pipes 5 of the injection pile as the main gas source access point. Connect one end of the metal hose tightly to the quick connector of the first branch pipe 5, ensuring the interface is fully engaged and without any looseness. Connect the other end of the metal hose to the first high-pressure needle valve 6. During connection, slowly rotate the metal hose to ensure it fully engages with the threads of the needle valve, and then tighten it appropriately with a special wrench to prevent gas leakage due to excessive looseness or damage to the interface due to excessive tightness.

[0054] Connect the backup gas source to the backup branch pipe in the same way as the main gas source, using a metal flexible hose to connect to the corresponding valve, and ensure that the connection is secure.

[0055] After the connection is complete, open the valves of the main inert gas source and the backup gas source to allow the gas to flow into the system slowly. At this time, monitor the pressure values ​​of the main and backup gas sources in real time using the first pressure gauge 10.

[0056] If the pressure is too low, check if the gas supply is sufficient or if the valve is open enough. If necessary, replace the gas cylinder with a new one. If the pressure is too high, slowly open the pressure relief valve in the system to adjust the pressure and control it within a safe range to ensure the safe and stable operation of subsequent replacement procedures.

[0057] 4. Installation of vent pipe

[0058] First, adjust the assembly height. If the required venting height is low, directly connect the female end of the first high-pressure locking quick connector 8 at the bottom of the first thick-walled pipe 1 to the male end of the vertical L-shaped thick-walled pipe, and rotate the cam to the locking position. If the required venting height is high, adjust the total height by adding or removing the third thick-walled pipe 7. The upper and lower ends of each pipe are the male and female ends of the first high-pressure locking quick connector 8, which are connected in series to achieve rapid extension.

[0059] Then, open the ball valve 21 on the horizontal pipe of the L-shaped thick-walled pipe, insert the male end of the second high-pressure locking quick connector 9 at its outer end into the female end of the gas facility's built-in connection port 3, turn the cam handle to lock it, and close the ball valve 21 for subsequent operations.

[0060] Furthermore, unfold the folding bracket of the L-shaped thick-walled pipe vertical pipe, rotate the support rod 18 to support the ground, and the limiting rod 19 automatically locks in place; if in a windy environment, connect multiple windproof ropes through the rope hole 20 and fix them to the ground anchor.

[0061] 5. Installation of injection piles

[0062] One end of the second thick-walled pipe 4 with ball valve 21 is connected to another connection port of the gas facility through the second high-pressure locking quick connector 9, and is also fixed by cam locking to ensure that a gas circulation path is formed with the vent pipe.

[0063] Connect a first pressure gauge 10 to one of the first branch pipes 5 of the injection pile, install a mechanical temperature gauge 11 on the adjacent branch pipe, and connect the remaining branch pipes to the main and backup gas source metal hoses respectively (one branch pipe can be reserved at the end as an emergency test port).

[0064] Pre-test for air tightness: Close all needle valves 6, open the injection pile ball valve 21, slowly open one of the air source valves to raise the pressure in the pipeline to 0.5MPa, then close the air source and observe the pressure gauge after standing for several minutes. If the pressure drop is ≤0.02MPa, the seal is qualified.

[0065] 6. Replacement Operation Steps

[0066] Inert gas injection stage:

[0067] Open the first high-pressure needle valve 6 of the main gas source of the injection pile, slowly open the ball valve 21, and monitor and control the injection pressure through the first pressure gauge 10.

[0068] At the same time, the ball valve 21 on the venting pipe side is opened, and the air in the gas facility is vented through the L-shaped thick-walled pipe and the top opening of the first thick-walled pipe 1. The oxygen content is monitored in real time by a portable oxygen analyzer through the replacement concentration test port 15 of the second branch pipe 12 of the venting pipe. When the concentration is ≤2%, the next stage is entered.

[0069] Gas replacement phase:

[0070] Close the inert gas source valve, connect the gas source to the injection pile backup branch pipe according to the same procedure, slowly inject the gas and monitor the gas concentration at the vent. When the concentration is ≥90% and stable for several minutes, close the vent pipe ball valve 21.

[0071] 7. Gas supply failure and emergency handling

[0072] The main gas source pressure dropped sharply.

[0073] When the pressure gauge 10 shows a pressure below 0.2 MPa, immediately close the main air source needle valve and simultaneously open the backup air source needle valve to complete the switching. If the backup air source also fails, close the injection pile ball valve 21 and open the vent pipe to maintain system depressurization.

[0074] Pipeline Leakage Emergency

[0075] If a gas leak is detected at the joint (which can be checked by spraying soapy water on the surface), first close the corresponding ball valve 21, unlock the quick connector cam, replace the sealing gasket, reconnect, and check the airtightness again.

[0076] Sudden fire source

[0077] Immediately close all gas source valves, activate the vent pipe flame arrester 16 (automatically prevents backfire), use fire extinguishers to extinguish the fire, and check the equipment damage after the gas has dissipated.

[0078] 8. Disassembly and finishing

[0079] First, close all ball valves 21 of the injection pile and vent pipe, open all needle valves to release residual pressure, and disassemble after the pressure gauge shows 0. Then, move the cam of the second high-pressure locking quick connector 9 to separate the L-shaped thick-walled pipe from the gas facility and the injection pile from the gas facility. Disassemble the third thick-walled pipe 7 (if any) of the vent pipe, separate the first thick-walled pipe 1 from the L-shaped thick-walled pipe, and cover all joints with dust caps.

[0080] Finally, all parts were recycled, the folded bracket was reset, debris around the vent was cleaned, and the waste inert gas cylinder was disposed of in accordance with regulations.

[0081] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

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