A gas venting pipe

Abstract

This utility model relates to the field of gas pipeline engineering technology and discloses a gas venting pipe. The gas venting pipe includes a support frame, a venting pipe assembly, a safety protection assembly, a multi-diameter connection assembly, and a sampling assembly. The support frame is made of welded angle iron and features a handle to improve portability and stability. The venting pipe assembly is made of seamless steel pipe with a length exceeding 2.5m, and connects a venting control valve and a detection control valve in series. The safety protection assembly includes a flame arrester, a static pressure gauge, and a grounding terminal, which can prevent backfire, monitor pressure in real time, and eliminate static electricity. The multi-diameter connection assembly adapts to different valve diameters via flange interfaces and threaded reducers. The sampling assembly has a dedicated sampling port and valve to meet gas sampling requirements. This device can adapt to various valve diameters, integrates multiple safety protections, balances portability and stability, ensures safe and efficient gas pipeline replacement and venting operations, is low-cost and easy to implement, and is suitable for various gas pipeline replacement and venting scenarios.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline engineering technology, specifically a gas venting pipe. Background Technology

[0002] After a gas pipeline is newly built, repaired, or renovated, a natural gas replacement and venting operation is required to remove air or inert gases from the pipeline and ensure the safety of subsequent gas transmission.

[0003] Currently, most gas venting pipes are temporary, simple devices. The existing pipes have a single connection interface specification, which cannot be adapted to gas valves of different diameters. During operation, multiple sets of pipes of different specifications need to be carried, increasing transportation costs and preparation time. Moreover, most simple pipes only have basic venting functions and lack flame arresters, real-time pressure monitoring devices, and grounding structures, posing serious safety hazards. In addition, some pipes adopt lightweight designs for portability, but their structural strength is insufficient and they are prone to tipping over during operation. Pipes with stable structures are mostly welded parts of fixed size, which are difficult to transport and cannot meet the mobility requirements of different operation scenarios. Furthermore, they lack dedicated sampling ports, requiring temporary drilling in the pipe body for sampling during operation, which compromises the pipe's seal and increases operational risks.

[0004] To address the aforementioned issues, it is necessary to design a gas venting pipe device that integrates multi-diameter compatibility, multiple safety protections, portability, stability, and multifunctionality to overcome the shortcomings of existing technologies and ensure the safety and efficiency of gas replacement and venting operations. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a gas venting pipe that can be adapted to gas valves of different diameters, eliminating the need to carry multiple sets of devices. It integrates multiple safety protection structures to avoid safety accidents such as backfire, static electricity, and overpressure. While ensuring structural stability, it improves portability and adapts to different operating scenarios. It also adds a dedicated sampling structure to ensure the safety and sealing of sampling operations.

[0007] (II) Technical Solution

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A gas venting pipe includes a support frame, the support frame being a modular welded structure, a venting pipe assembly vertically fixed to the top of the support frame in an L-shape, a venting control valve and a detection control valve being sequentially connected in series on the pipeline of the venting pipe assembly, a safety protection component being provided on the outer surface of the venting pipe assembly, the safety protection component including a flame arrester, a static pressure gauge and a grounding terminal, the flame arrester being fixed at the top outlet of the venting pipe assembly, the static pressure gauge being connected in parallel to the pipeline through an interface, the grounding terminal being welded to the side of the venting pipe assembly, a multi-diameter connection component being provided at the tail end of the venting pipe assembly, the multi-diameter connection component including a flange interface and a multi-specification threaded flange reducing short connector, the flange interface being fixed at the bottom inlet of the venting pipe assembly, the multi-specification threaded flange reducing short connector being detachably connected to the flange interface, a sampling port being provided on the other side of the venting pipe assembly, the sampling port being sealed to the venting pipe assembly through a sampling valve.

[0009] The beneficial effects of this utility model are:

[0010] This gas venting pipe features a detachable design with multi-specification threaded flanges for diameter reduction and shorting, making it compatible with mainstream gas valve diameters ranging from DN25 to DN65. This eliminates the need to carry multiple sets of pipes, reducing preparation time and transportation costs. It also incorporates triple safety protection with an integrated flame arrester, static pressure gauge, and grounding terminal, mitigating the risk of serious accidents from the source. The modular support frame design keeps the weight under 30kg, balancing portability and structural strength. A dedicated sampling component eliminates the need for temporary drilling, ensuring pipe sealing and meeting the requirements for gas composition detection during operations, thus improving work efficiency.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the support frame is made of angle iron welded together, and its side is provided with handles for easy handling.

[0013] The beneficial effects of adopting the above-mentioned further solutions are that they enhance stability during operation, prevent slippage, and facilitate handling by one or two people.

[0014] Furthermore, the venting pipe assembly is made of seamless steel pipe, and the pipe body is fixed to the support frame by U-shaped clamps, with a rubber buffer pad provided between the U-shaped clamps and the pipe body.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the tube body can be fixed to the support frame by two U-shaped clamps, and a 3mm thick rubber buffer pad is set on the inside of the clamps to reduce the collision and wear between the tube body and the frame during the handling of the device.

[0016] Furthermore, both the venting control valve and the detection control valve are DN50 ball valves, and the valve handles are equipped with anti-slip textures.

[0017] The advantages of adopting the above-mentioned further solutions are that the switching is flexible and the sealing performance is good.

[0018] Furthermore, the multi-specification threaded flange reducing short connector includes four diameters: DN25, DN40, DN50, and DN65.

[0019] The beneficial effects of adopting the above-mentioned further solution are that the multi-specification threaded flange reducing short connector includes four commonly used diameters: DN25, DN40, DN50, and DN65. The thread length of the short connector is 18mm, ensuring connection depth and improving sealing. The flange end matches the DN50 standard flange and can be quickly replaced with bolts to meet the connection requirements of different valve diameters.

[0020] Furthermore, the static pressure gauge has a range of 0-1.6 MPa, a dial diameter of not less than 80 mm, a casing made of explosion-proof material, and a sealing gasket at the interface.

[0021] The beneficial effects of adopting the above-mentioned further solution are that the static pressure gauge has a range of 0-1.6MPa, which is suitable for the normal pressure range of gas pipelines. The gauge housing is made of explosion-proof cast aluminum. It is connected in parallel to the pipeline between the detection control valve and the venting control valve through an internal threaded interface. A nitrile rubber sealing gasket is installed at the interface to prevent gas leakage.

[0022] Furthermore, the grounding terminal is made of brass, and the grounding terminal and the venting pipe assembly (2) are fully welded together.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the grounding terminal is made of brass, which has good conductivity. It is welded to the lower part of the venting pipe assembly, and two M8 threaded holes are opened on the terminal for connecting the grounding wire to eliminate static electricity.

[0024] Furthermore, the inner diameter of the sampling port is 10mm, the sampling valve is a needle valve, and a quick connector is provided at the outlet of the sampling valve.

[0025] The beneficial effects of adopting the above-mentioned further solution are that the sampling port is opened on the vent pipe below the detection control valve, with an inner diameter of 10mm. The sampling valve adopts a DN10 needle valve, which has high switching accuracy and can control the sampling flow. The valve inlet is welded and sealed to the sampling port, and a quick connector is set at the outlet to facilitate the connection of the sampling hose. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] In the diagram: 1. Support frame; 2. Vent pipe assembly; 3. Vent control valve; 4. Detection control valve; 5. Safety protection components; 51. Flame arrester; 52. Static pressure gauge; 53. Grounding terminal; 54. Interface; 6. Multi-diameter connection assembly; 61. Flange interface; 62. Multi-specification threaded flange reducing short connector; 7. Sampling port; 8. Sampling valve; 9. U-shaped clamp; 10. Quick coupling. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the embodiments, by Figure 1 Provided is a gas venting pipe. This utility model includes a support frame 1, which is a modular welded structure. A venting pipe assembly 2, L-shaped, is vertically fixed to the top of the support frame 1. A venting control valve 3 and a detection control valve 4 are sequentially connected in series on the venting pipe assembly 2. A safety protection component 5 is provided on the outer surface of the venting pipe assembly 2. The safety protection component 5 includes a flame arrester 51, a static pressure gauge 52, and a grounding terminal 53. The flame arrester 51 is fixed to the top outlet of the venting pipe assembly 2. The static pressure gauge... Table 52 is connected in parallel to the pipeline through interface 54. Grounding terminal 53 is welded to the side of vent pipe assembly 2. A multi-diameter connection assembly 6 is provided at the tail end of vent pipe assembly 2. The multi-diameter connection assembly 6 includes a flange interface 61 and a multi-specification threaded flange reducing short connector 62. The flange interface 61 is fixed at the bottom inlet of vent pipe assembly 2. The multi-specification threaded flange reducing short connector 62 is detachably connected to the flange interface 61. A sampling port 7 is provided on the other side of vent pipe assembly 2. The sampling port 7 is sealed to vent pipe assembly 2 through sampling valve 8.

[0030] The support frame 1 is made of angle iron welded together, and its side is equipped with handles for easy handling.

[0031] The venting pipe assembly 2 is made of seamless steel pipe. The pipe body is fixed to the support frame 1 by U-shaped clamps 9, and a rubber buffer pad is provided between the U-shaped clamps 9 and the pipe body.

[0032] Both the venting control valve 3 and the detection control valve 4 are DN50 ball valves, and the valve handles are equipped with anti-slip textures.

[0033] The multi-specification threaded flange reducing short connector 62 includes four diameters: DN25, DN40, DN50, and DN65.

[0034] The static pressure gauge 52 has a range of 0-1.6MPa, a dial diameter of not less than 80mm, a casing made of explosion-proof material, and a sealing gasket at the interface.

[0035] The grounding terminal 53 is made of brass and is fully welded to the venting pipe assembly 2.

[0036] The inner diameter of sampling port 7 is 10mm, and sampling valve 8 is a needle valve. A quick connector 10 is provided at the outlet of sampling valve 8.

[0037] Working principle:

[0038] Connect the device to the DN50 gas valve via a DN50 reducer. Close the vent control valve 3 and the sampling valve 8. Open the detection control valve 4 and the gas valve. Introduce 0.8MPa compressed air into the device and maintain this pressure for 30 minutes. Observe whether the pressure gauge reading drops. At the same time, apply soapy water to each interface and check for bubbles. If no bubbles are generated, the seal is qualified. Ignite a small amount of natural gas at the top outlet of the device and observe whether the flame arrester 51 can prevent the flame from entering the pipe. If the flame only burns outside the flame arrester 51, there is no flame inside the pipe, and the flame arrest is qualified. Replace the DN25, DN40, and DN65 reducers and connect them to the corresponding diameter gas valves. Check whether the connections are secure and not loose, and whether the valves open and close smoothly without jamming. Finally, have one operator carry the device by the frame handle. After carrying, check whether any parts of the device are loose. If there is no looseness, the portability is qualified.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas venting pipe, comprising a support frame (1), the support frame (1) being a modular welded structure, a venting pipe assembly (2) vertically fixed to the top of the support frame (1) and being L-shaped, wherein a venting control valve (3) and a detection control valve (4) are sequentially connected in series on the pipeline of the venting pipe assembly (2), characterized in that, The outer surface of the vent pipe assembly (2) is provided with a safety protection component (5), which includes a flame arrester (51), a static pressure gauge (52), and a grounding terminal (53). The flame arrester (51) is fixed at the top outlet of the vent pipe assembly (2), the static pressure gauge (52) is connected in parallel to the pipeline through an interface (54), and the grounding terminal (53) is welded to the side of the vent pipe assembly (2). The tail end of the vent pipe assembly (2) is provided with a safety protection component (5). A multi-diameter connection assembly (6) includes a flange interface (61) and a multi-specification threaded flange reducing short connector (62). The flange interface (61) is fixed at the bottom inlet of the vent pipe assembly (2). The multi-specification threaded flange reducing short connector (62) is detachably connected to the flange interface (61). A sampling port (7) is provided on the other side of the vent pipe assembly (2). The sampling port (7) is sealed to the vent pipe assembly (2) through a sampling valve (8).

2. The gas venting pipe according to claim 1, characterized in that, The support frame (1) is made of angle iron welded together, and its side is provided with handles for easy handling.

3. A gas venting pipe according to claim 1, characterized in that, The venting pipe assembly (2) is made of seamless steel pipe. The pipe body is fixed to the support frame (1) by U-shaped clamps (9). A rubber buffer pad is provided between the U-shaped clamps (9) and the pipe body.

4. A gas venting pipe according to claim 1, characterized in that, Both the venting control valve (3) and the detection control valve (4) are DN50 ball valves, and the valve handles are provided with anti-slip textures.

5. A gas venting pipe according to claim 1, characterized in that, The multi-specification threaded flange reducing short connector (62) includes four diameters: DN25, DN40, DN50, and DN65.

6. A gas venting pipe according to claim 1, characterized in that, The static pressure gauge (52) has a range of 0-1.6MPa, a dial diameter of not less than 80mm, a casing made of explosion-proof material, and a sealing gasket at the interface.

7. A gas venting pipe according to claim 1, characterized in that, The grounding terminal (53) is made of brass and is fully welded to the venting pipe assembly (2).

8. A gas venting pipe according to claim 1, characterized in that, The inner diameter of the sampling port (7) is 10 mm, the sampling valve (8) is a needle valve, and a quick connector (10) is provided at the outlet of the sampling valve (8).

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