Natural gas pipeline network leakage alarm equipment

Abstract

The utility model relates to the technical field of natural gas pipeline networks, and discloses a natural gas pipeline network leakage alarm device which comprises a conveying pipe, the conveying pipe is used for conveying natural gas, the conveying pipe is connected with an installation pipe through a flange, and a detection device is fixedly connected into the installation pipe. The buffer assembly is arranged in the mounting pipe, the buffer assembly is used for buffering the flowing speed of natural gas, the buffer assembly comprises a fixed block, a movable block and a communicating pipe, the fixed block is fixedly connected with the mounting pipe, the movable block abuts against the fixed block, the movable block is elastically connected with the fixed block, and the communicating pipe penetrates through the fixed block and the movable block; the fixed block is provided with supporting rods in a surrounding manner, each supporting rod is fixedly connected with the fixed block, through cooperation of internal parts of the buffer assembly, the situation that airflow impact force of natural gas directly impacts on the detection device in the continuous conveying process, and the detection device is damaged is avoided, the detection device is protected, the leakage detection precision is ensured, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to natural gas pipe network technical field, concretely relates to a natural gas pipe network leak alarm device. BACKGROUND

[0002] Natural gas leak alarm is a kind of alarm in the process of natural gas use leakage, domestic security device, natural gas composition is mainly methane (CH4) ;There are also a small amount of ethane, propane, butane and other small amount of gas;Natural gas is colorless and odorless, and the density is less than air;Leakage will run up.When the concentration of natural gas leakage in air reaches 5% to 15%, it will explode when encountering open flame.

[0003] The document with the public number (CN221684308U) discloses a natural gas pipe network leak alarm device, including pipeline, the upper surface of the pipeline is equipped with air pressure detection mechanism, the inner wall of the pipeline left and right sides is fixedly connected with connecting block;Temperature detection mechanism, two groups of connecting blocks are inserted with temperature detection mechanism in the middle, the front end of left connecting block is inserted with locking bolt, through air pressure detection mechanism, it is convenient to detect the internal air pressure of pipeline, through temperature detection mechanism, it is convenient to effectively detect the internal gas temperature of pipeline, through locking bolt and spring, it is convenient to limit temperature detection mechanism during use, avoid falling off during installation, and after temperature detection mechanism is damaged, it can be quickly removed and replaced, through natural gas concentration detection mechanism, it is convenient to detect the concentration of natural gas leakage in air, and when the concentration is too high, alarm is sent, and staff is reminded to do protection.

[0004] The above device in actual use, because the natural gas in pipeline in transportation because of the narrow space of pipeline and initial pressure factor, the flow velocity of natural gas is too large, and the natural gas directly impacts on the leak alarm device, so that the leak alarm device is damaged due to the continuous impact of natural gas during use, and the detection of natural gas leakage is affected.

[0005] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0006] To solve the protection technical problem of natural gas leakage detection instrument, the basic concept of technical scheme of the utility model is:

[0007] The utility model provides a natural gas pipe network leakage alarm device, including the conveying pipe for conveying natural gas, and the installation pipe is connected through the flange on the conveying pipe, and the detection device is fixedly connected in the installation pipe, the buffer assembly is set up in the installation pipe, and the buffer assembly is used for buffering the flow velocity of natural gas, and the buffer assembly includes fixed block, movable block and the communicating pipe, the fixed block is fixedly connected with the installation pipe, the movable block is abutted with the fixed block, and the movable block is elastically connected with the fixed block, and the communicating pipe penetrates fixed block and movable block.

[0008] As a preferred embodiment of the utility model, a plurality of supporting rods are arranged around the fixed block, each supporting rod is fixedly connected with the fixed block, and the movable block is slidingly connected with each supporting rod.

[0009] As a preferred embodiment of the utility model, a spring is sleeved on each supporting rod, one end of each spring is fixedly connected with the corresponding supporting rod, and the other end of each spring is fixedly connected with the movable block.

[0010] As a preferred embodiment of the utility model, each communicating pipe is arranged around the fixed block and the movable block, and a through hole is formed in the end portion of each communicating pipe.

[0011] As a preferred embodiment of the utility model, each communicating pipe is fixedly connected with the fixed block, and each communicating pipe is slidingly connected with the movable block.

[0012] As a preferred embodiment of the utility model, the end portion of the movable block is fixedly connected with a limiting block, the limiting block is abutted with the fixed block, the limiting block penetrates the fixed block, and a communicating opening is arranged around the limiting block.

[0013] As a preferred embodiment of the utility model, a ring block is fixedly connected in the installation pipe, a connecting rod is arranged around the ring block, each connecting rod is fixedly connected with the ring block, and each connecting rod is fixedly connected with the same blocking block.

[0014] As a preferred embodiment of the utility model, a guide ring is arranged on the blocking block and the ring block, the guide rings are oppositely arranged, and each guide ring is fixedly connected with the corresponding blocking block and ring block.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The natural gas pipe network leakage alarm device avoids the impact of the gas flow of natural gas on the detection device during continuous conveying, protects the detection device, and ensures the accuracy and service life of leakage detection.

[0017] 2. The natural gas pipeline network leakage alarm device, natural gas flows to the blocking block and the ring block end after being detected, the blocking block blocks the transportation of natural gas, after natural gas passes between the guide rings, because the end of the guide ring is arc-shaped, when passing through the narrow gap between the annular protrusions, the natural gas will generate local turbulence due to shearing action, and the natural gas is quickly discharged through the turbulence, the opposite arrangement of the annular protrusions forms a multi-stage pressure gradient, and the natural gas is dispersed and collected through the pressure ladder and then transported, so that the direct impact of natural gas on downstream components can be reduced.

[0018] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] In the drawings:

[0020] Figure 1 is a three-dimensional schematic view of the present application;

[0021] Figure 2 is an installation pipe cross-sectional view schematic diagram of the present application;

[0022] Figure 3 is a structure schematic diagram between the fixed block and the movable block of the present application;

[0023] Figure 4 is a structure schematic diagram on the movable block of the present application;

[0024] Figure 5 is a structure schematic diagram between the blocking block and the ring block of the present application.

[0025] In the drawings: 1, installation pipe; 11, conveying pipe; 2, fixed block; 21, movable block; 22, support rod; 23, spring; 24, communication pipe; 25, limiting block; 26, communication port; 3, detection device; 4, blocking block; 41, ring block; 42, guide ring; 43, connecting rod. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and the following embodiments are used to illustrate the present application.

[0027] Please refer to Figures 1-5The utility model provides a kind of natural gas pipeline network leakage alarm device, including conveying pipe 11, conveying pipe 11 is used to convey natural gas, and installation pipe 1 is connected on conveying pipe 11 by flange, flange is existing mature technology, so it is not shown in detail in the figure, and not too much is described in text, here no longer repeat, detection device 3 is fixedly connected in installation pipe 1;Buffer assembly, buffer assembly is arranged in installation pipe 1, and buffer assembly is used to buffer the flow velocity of natural gas, and buffer assembly includes fixed block 2, movable block 21 and communication pipe 24, fixed block 2 is fixedly connected with installation pipe 1, movable block 21 is abutted with fixed block 2, and movable block 21 is elastically connected with fixed block 2, and communication pipe 24 penetrates fixed block 2 and movable block 21, by the cooperation of buffer assembly internal member, avoid the gas flow impact force of natural gas in continuous delivery, directly impact on detection device 3, cause damage to detection device 3, protect detection device 3, ensure that the precision of leakage detection and life is improved.

[0028] It is worth mentioning that the detection device 3 includes a plurality of intelligent monitoring devices arranged at different positions on the long-distance gas pipeline network and a remote terminal integrated device arranged in the background. The intelligent monitoring devices are wirelessly and bidirectionally connected to the remote terminal integrated device through a GPRS network. The intelligent monitoring devices include a gas concentration monitor, a water level sensor, a temperature sensor, an analog-digital conversion circuit, a single-chip microcomputer, a first sound-light alarm module, a power module, and a GPRS communication module. The output end of the gas concentration monitor is connected to the analog-digital conversion circuit. The output end of the analog-digital conversion circuit is connected to the single-chip microcomputer. The output end of the single-chip microcomputer is connected to the first sound-light alarm module. The input-output end of the single-chip microcomputer is connected to the GPRS communication module. The above-mentioned devices can monitor the long-distance natural gas pipeline network in real time to prevent accidents. The detection device 3 has been disclosed in the prior art natural gas long-distance pipeline network gas leakage alarm safety monitoring system CN209000188U, and will not be described here.

[0029] The fixed block 2 is provided with a supporting rod 22 around, each supporting rod 22 is fixedly connected with the fixed block 2, the movable block 21 is slidably connected with each supporting rod 22, each supporting rod 22 is sleeved with a spring 23, one end of each spring 23 is fixedly connected with the corresponding supporting rod 22, the other end of each spring 23 is fixedly connected with the movable block 21, each communicating pipe 24 is provided around the fixed block 2 and the movable block 21, the end of each communicating pipe 24 is provided with a through hole, each communicating pipe 24 is fixedly connected with the fixed block 2, each communicating pipe 24 is slidably connected with the movable block 21, the end of the movable block 21 is fixedly connected with a limiting block 25, the limiting block 25 is in abutment with the fixed block 2, and the limiting block 25 penetrates the fixed block 2, the limiting block 25 is provided with a communicating port 26 around, after the natural gas enters the installation pipe 1 through the conveying pipe 11, there are two cases: in the case that the natural gas flow velocity is small, the natural gas is transported by bypassing the fixed block 2 and the movable block 21 through the communicating pipe 24, and the transported natural gas is detected by the detection device 3;

[0030] In the case that the natural gas flow velocity is large, the impact force brought by the natural gas flow pushes the movable block 21, the movable block 21 is compressed in movement, the movable block 21 drives the limiting block 25 to separate from the fixed block 2, after the limiting block 25 separates from the fixed block 2, the communicating port 26 on the limiting block 25 loses the blockage of the fixed block 2, the natural gas is quickly discharged through the communicating port 26, but the impact force of the natural gas is buffered by the movable block 21 and the limiting block 25, and the end of the communicating pipe 24 is gradually blocked in movement of the movable block 21, when the impact force of the natural gas flow is reduced, the movable block 21 loses the impact force of the natural gas, the deformation force generated by the compression of the spring 23 is applied to the movable block 21, the movable block 21 is pushed to block the fixed block 2 again, the communicating port 26 is closed through the fixed block 2, and the natural gas is transported through the communicating pipe 24 again;

[0031] Through cooperation of the internal components of the buffering assembly, the impact force of the natural gas flow is prevented from directly impacting on the detection device 3 in continuous transportation, damage to the detection device 3 is avoided, the detection device 3 is protected, and the accuracy and service life of leakage detection are improved.

[0032] The installation pipe 1 is fixedly connected with a ring block 41, the ring block 41 is provided with a connecting rod 43 around, each connecting rod 43 is fixedly connected with the ring block 41, each connecting rod 43 is fixedly connected with the same blocking block 4, the blocking block 4 and the ring block 41 are provided with a guide ring 42, the guide rings 42 are oppositely arranged, and each guide ring 42 is fixedly connected with the corresponding blocking block 4 and the ring block 41, the end of the guide ring 42 is arc-shaped, the natural gas flows to the end of the blocking block 4 and the ring block 41 after being detected, the blocking block 4 blocks the transportation of the natural gas, and after the natural gas passes between the guide rings 42, the natural gas will generate local turbulent flow due to the arc-shaped end of the guide ring 42 when passing through the narrow gap between the annular protrusions, the natural gas is quickly discharged through the turbulent flow, the opposite arrangement of the annular protrusions forms a multi-stage pressure gradient, the natural gas is transported after being dispersed and collected through the pressure ladder, and the direct impact of the natural gas on downstream components can be reduced.

[0033] Working principle: after the natural gas enters the installation pipe 1 through the conveying pipe 11, two cases are divided: in the case that the natural gas flow velocity is small, the natural gas is transported by bypassing the fixed block 2 and the movable block 21 through the communication pipe 24, and the transported natural gas is detected by the detection device 3; in the case that the natural gas flow velocity is large, the natural gas is pushed by the impact force brought by the gas flow to drive the movable block 21 to move and compress the spring 23, the movable block 21 drives the limiting block 25 to separate from the fixed block 2, after the limiting block 25 separates from the fixed block 2, the communication port 26 on the limiting block 25 loses the blockage of the fixed block 2, and the natural gas is quickly discharged through the communication port 26, but the impact force of the natural gas is buffered by the movable block 21 and the limiting block 25, and the end of the communication pipe 24 is gradually blocked by the movable block 21 during movement, when the gas flow impact force of the natural gas is reduced, the movable block 21 loses the impact force of the natural gas, the deformation force generated by the compression of the spring 23 is applied to the movable block 21, the movable block 21 is pushed to block the fixed block 2 again, the communication port 26 is closed by the fixed block 2, and the natural gas is conveyed through the communication pipe 24 again; through the cooperation of the internal components of the buffer assembly, the gas flow impact force of the natural gas is avoided from directly impacting on the detection device 3 in the continuous conveying, the detection device 3 is protected, the accuracy and service life of the leakage detection are improved, the natural gas flows to the end of the blocking block 4 and the ring block 41 after being detected, the blocking block 4 blocks the transportation of the natural gas, and after the natural gas passes between the guide rings 42, the natural gas will generate local turbulent flow due to the arc-shaped end of the guide ring 42 when passing through the narrow gap between the annular protrusions, the natural gas is quickly discharged through the turbulent flow, the opposite arrangement of the annular protrusions forms a multi-stage pressure gradient, the natural gas is transported after being dispersed and collected through the pressure ladder, and the direct impact of the natural gas on downstream components can be reduced.

[0034] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the application belong to the scope protected by the utility model.

Claims

1. A natural gas pipeline leak alarm device, characterized in that, include: The conveying pipe (11) is used to transport natural gas. An installation pipe (1) is connected to the conveying pipe (11) via a flange. A detection device (3) is fixedly connected inside the installation pipe (1). The buffer assembly is installed inside the installation pipe (1) and is used to buffer the flow rate of natural gas. The buffer assembly includes a fixed block (2), a movable block (21) and a connecting pipe (24). The fixed block (2) is fixedly connected to the installation pipe (1), the movable block (21) abuts against the fixed block (2), and the movable block (21) and the fixed block (2) are elastically connected. The connecting pipe (24) passes through the fixed block (2) and the movable block (21).

2. The natural gas pipeline leak alarm device according to claim 1, characterized in that, The fixed block (2) is surrounded by support rods (22), each support rod (22) is fixedly connected to the fixed block (2), and the movable block (21) is slidably connected to each support rod (22).

3. The natural gas pipeline leak alarm device according to claim 2, characterized in that, Each of the support rods (22) is fitted with a spring (23), one end of each spring (23) is fixedly connected to the corresponding support rod (22), and the other end of each spring (23) is fixedly connected to the movable block (21).

4. The natural gas pipeline leak alarm device according to claim 1, characterized in that, Each of the connecting pipes (24) is arranged around the fixed block (2) and the movable block (21), and each connecting pipe (24) has a through hole at its end.

5. The natural gas pipeline leak alarm device according to claim 4, characterized in that, Each of the connecting pipes (24) is fixedly connected to the fixed block (2), and each connecting pipe (24) is slidably connected to the movable block (21).

6. The natural gas pipeline leak alarm device according to claim 1, characterized in that, The end of the movable block (21) is fixedly connected to a limiting block (25), the limiting block (25) abuts against the fixed block (2), and the limiting block (25) penetrates the fixed block (2). A connecting port (26) is arranged around the limiting block (25).

7. The natural gas pipeline leak alarm device according to claim 1, characterized in that, A ring block (41) is fixedly connected inside the installation tube (1). A connecting rod (43) is arranged around the ring block (41). Each connecting rod (43) is fixedly connected to the ring block (41), and each connecting rod (43) is fixedly connected to the same blocking block (4).

8. The natural gas pipeline leak alarm device according to claim 7, characterized in that, Both the blocking block (4) and the ring block (41) are provided with guide rings (42), which are arranged facing each other, and each guide ring (42) is fixedly connected to the corresponding blocking block (4) and ring block (41).

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