Novel explosion-proof sound wave pipeline leakage monitor

Abstract

The invention relates to the technical field of sound wave signal acquisition, and discloses a novel anti-explosion sound wave pipeline leakage monitor which comprises an anti-explosion shell, a sound wave gathering cavity is embedded in the upper end of a fixed base, a bubble grating is embedded in one end of the sound wave gathering cavity, and a sensor mounting seat is arranged at the upper end of the sound wave gathering cavity; the sensor mounting seat is in threaded connection with the fixed base; according to the invention, sound wave signals can be converted into electric signals for detecting pipe network leakage signals; the explosion-proof switch has an explosion-proof function and can be used for occasions with explosion-proof requirements; the device is provided with the sound wave gathering cavity, leakage sound wave signals can be improved, and the sensitivity of leakage detection is improved; the device is provided with the bubble grating, bubbles generated by flowing of liquid in a pipe network can be filtered out, the false alarm rate is reduced, and therefore the leakage detection precision is improved; the device is provided with a needle valve, and the needle valve has three states of connection, exhaust and closing and is used for connecting and disconnecting a monitor and discharging air in a pipe network.

Description

Technical Field

[0001] The invention belongs to the technical field of acoustic wave signal acquisition, and in particular relates to a novel explosion-proof acoustic wave pipeline leakage monitor. Background Art

[0002] In industrial production, the safe and stable operation of pipeline systems is of vital importance. Traditional pipeline leakage detection methods often rely on manual inspections or pressure change monitoring, which are not only inefficient but also difficult to detect small leaks in a timely manner. Especially in high-pressure and explosive environments, leak detection faces greater challenges. Therefore, it is particularly important to develop a monitoring device that can monitor pipeline leakage in real time and accurately, while also having explosion-proof functions. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a new explosion-proof sonic pipeline leakage monitor, which effectively solves the problems raised in the above background.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a novel explosion-proof sonic pipeline leakage monitor, comprising an explosion-proof shell, a connector, a sonic signal conversion module, a sensor mounting seat, a sonic sensor, a sonic gathering cavity, a bubble grid, a needle valve, an exhaust hole, a fixed base, a filter screen, a quick-install connector, a flameproof threading hole, a wiring terminal, a front cover and a rear cover, wherein a sonic gathering cavity is embedded in the upper end of the fixed base, a bubble grid is embedded in one end of the sonic gathering cavity, a sensor mounting seat is provided at the upper end of the sonic gathering cavity, the sensor mounting seat is threadedly connected to the fixed base, a sonic sensor is embedded in the interior of the sensor mounting seat, the upper end of the sensor mounting seat is connected to the explosion-proof shell, one end of the explosion-proof shell is connected to the connector, a sonic signal conversion module is installed in the explosion-proof shell, a wiring terminal is installed on the side of the explosion-proof shell away from the sonic signal conversion module, one end of the explosion-proof shell is connected to the front cover, and the other end of the explosion-proof shell is connected to the rear cover.

[0005] Preferably, a quick-install joint is threadedly connected to the lower end of the fixed base, and a filter screen is provided at the connecting end of the quick-install joint and the fixed base.

[0006] Preferably, a needle valve is threadedly connected to one side end of the fixed base, and an exhaust hole is provided at the lower end of the needle valve.

[0007] Preferably, the sensor mounting seat and the acoustic signal conversion module are connected via a coaxial cable.

[0008] Preferably, a flameproof wire threading hole is provided inside the explosion-proof housing.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The present invention can convert acoustic wave signals into electrical signals for detecting leakage signals in pipe networks;

[0011] 2. The invention has explosion-proof function and can be used in occasions requiring explosion-proof;

[0012] 3. The invention has an acoustic wave focusing cavity, which can enhance the leakage acoustic wave signal and improve the sensitivity of leakage detection;

[0013] 4. The invention has a bubble grid that can filter out bubbles generated by the flow of liquid in the pipe network, reduce the false alarm rate, and thus improve the accuracy of leak detection;

[0014] 5. The invention has a needle valve, which has three states: on, exhaust, and off. It is used to connect and close the monitor and is also used to discharge air in the pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] In the attached picture:

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the installation structure of the wiring terminal of the present invention;

[0019] Figure 3 It is a schematic diagram of the appearance structure of the present invention;

[0020] In the figure: 1. explosion-proof shell; 2. connector; 3. sound wave signal conversion module; 4. sensor mounting base; 5. sound wave sensor; 6. sound wave focusing chamber; 7. bubble grid; 8. needle valve; 9. exhaust hole; 10. fixed base; 11. filter screen; 12. quick installation connector; 13. explosion-proof threading hole; 14. wiring terminal; 15. front cover; 16. rear cover. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Embodiment 1, by Figure 1-Figure 3The present invention comprises an explosion-proof housing 1, a connector 2, an acoustic signal conversion module 3, a sensor mounting seat 4, an acoustic sensor 5, an acoustic gathering cavity 6, a bubble grid 7, a needle valve 8, an exhaust hole 9, a fixed base 10, a filter screen 11, a quick installation connector 12, an explosion-proof threading hole 13, a terminal 14, a front cover 15 and a rear cover 16. The upper end of the fixed base 10 is embedded with an acoustic gathering cavity 6, one end of the acoustic gathering cavity 6 is embedded with a bubble grid 7, and the upper end of the acoustic gathering cavity 6 is provided with a sensor. The sensor mounting base 4 is threadedly connected to the fixed base 10, an acoustic wave sensor 5 is embedded in the sensor mounting base 4, an upper end of the sensor mounting base 4 is connected to an explosion-proof shell 1, one end of the explosion-proof shell 1 is connected to a connector 2, an acoustic wave signal conversion module 3 is installed inside the explosion-proof shell 1, a wiring terminal 14 is installed on the side of the explosion-proof shell 1 away from the acoustic wave signal conversion module 3, one end of the explosion-proof shell 1 is connected to a front end cover 15, and the other end of the explosion-proof shell 1 is connected to a rear end cover 16.

[0023] A quick-install joint 12 is threadedly connected to the lower end of the fixed base 10 , and a filter screen 11 is provided at the connection end between the quick-install joint 12 and the fixed base 10 .

[0024] A needle valve 8 is threadedly connected to one side end of the fixed base 10 , and an exhaust hole 9 is provided at the lower end of the needle valve 8 .

[0025] The sensor mounting seat 4 is connected to the sound wave signal conversion module 3 via a coaxial cable.

[0026] A flameproof wire threading hole 13 is provided inside the explosion-proof housing 1 .

[0027] Explosion-proof housing 1: Made of high-strength explosion-proof material to protect internal electronic components from external explosion impact;

[0028] Connector 2: used to connect external cables or data lines to achieve signal transmission;

[0029] Acoustic signal conversion module 3: responsible for amplifying, detecting and processing the electrical signals collected by the acoustic sensor;

[0030] Sensor mounting seat 4: used for mounting and fixing the acoustic wave sensor 5;

[0031] Acoustic sensor 5: high sensitivity, used to capture the acoustic wave signal in the pipeline;

[0032] Sound wave focusing cavity 6: The internal design is a spiral structure to enhance the strength of the sound wave signal;

[0033] Bubble grid 7: filter out bubble interference in the sound wave signal;

[0034] Needle valve 8: It has three states: on, exhaust and off, and is used to control the air discharge and liquid isolation in the pipeline;

[0035] Exhaust hole 9: cooperates with needle valve 8 to realize exhaust function;

[0036] Fixed base 10: supports the entire monitor for easy installation and fixation;

[0037] Filter 11: filter impurities in the pipeline and protect internal components;

[0038] Quick-install connector 12: convenient for quick connection and disconnection of the monitor and the pipeline;

[0039] Flameproof wire threading hole 13: ensures that the wires pass through the explosion-proof housing 1 while maintaining the explosion-proof performance;

[0040] Terminal block 14: provides a connection point with an external circuit;

[0041] The front cover 15 and the rear cover 16 are used to seal the explosion-proof housing 1 and protect the internal components.

[0042] During assembly, the acoustic signal conversion module 3 is fixed inside the explosion-proof housing 1 by screws, the acoustic sensor 5 is fixed in the sensor mounting seat 4, and is connected to the acoustic signal conversion module 3 by a coaxial cable, and the external cable passes through the flameproof threading hole 13 through the connector 2 and is connected to the wiring terminal 14, and the wiring terminal 14 is then connected to the acoustic signal conversion module 3 to complete the electrical signal transmission;

[0043] The filter screen 11 is put in from the bottom end of the fixed base 10, and the quick-install joint 12 with its own external thread is screwed into the fixed base 10 and tightened, so that the filter screen 11 can be tightly fixed to the fixed base 10. The valve body of the needle valve 8 is connected to the side of the fixed base 10 through a thread, and the valve body of the needle valve 8 is designed with an exhaust hole 9. The bubble grid 7 is first embedded in one end of the sound wave gathering cavity 6, and then the whole is put in from the top of the fixed base 10. The sound wave sensor 5 is put into the sensor mounting seat 4 and fixed to the sensor mounting seat 4 through a nut, and then the explosion-proof housing 1 and the sensor mounting seat 4 are installed as a whole on the fixed base 10 to form a rigid whole, and then connected to the pipe network to be detected through the quick-install joint 12;

[0044] Working principle: When in use, the quick-install connector 12 is used to connect the pipe network to be tested. The test pipe network is filled with liquid of a certain pressure. When the liquid flows normally, the pressure change in the test pipe network is small, and the acoustic wave sensor 5 collects an acoustic signal with a small amplitude fluctuation.

[0045] When damage occurs in the detection pipe network, the liquid in the detection pipe network is pushed by pressure, gathers toward the damaged part and sprays outward. A strong sound wave signal will be generated at the damaged part. This sound wave signal will propagate along the direction of liquid flow, and will be transmitted to the filter screen 11 through the inner cavity of the quick-install connector 12. The filter screen 11 can filter out larger impurities in the pipe network. The needle valve 8 is usually in an open state. The sound wave signal passes through the needle valve 8 to reach the bubble grid 7, and the bubble grid 7 can filter out the bubbles that reach here. The interior of the sound wave gathering cavity 6 is a spiral structure, which has a great strengthening effect on the sound wave signal. The sound wave sensor 5 collects the sound wave signal propagated here, converts it into an electrical signal and transmits it to the sound wave signal conversion module 3. The sound wave signal conversion module 3 amplifies, detects and processes the sound wave signal, and then outputs the electrical signal in the format required by the user. The sound wave signal conversion module 3 has a 4-20mA current output interface, a pulse signal output interface, and an RS-485 interface output interface, which are convenient for users to collect.

[0046] The needle valve 8 has three working states: connected, exhausted, and closed. It is normally in the connected state. When the detection network is filled with liquid, there is a lot of air in the detection network. After the air is compressed by the liquid, it gathers in the cavity of the ultrasonic network leakage detector. Because the air is compressible, it has a greater attenuation effect on the sound wave signal. At this time, the needle valve 8 is in the exhaust state, and the air in the network will be discharged through the exhaust hole 9 of the needle valve 8, thereby improving the detection accuracy. When the sensor 5 needs to be replaced, the needle valve 8 is rotated to the closed state, which can isolate the liquid in the network and facilitate changes and maintenance.

Claims

1. A novel explosion-proof sonic pipeline leakage monitor, comprising an explosion-proof housing (1), a connector (2), a sonic signal conversion module (3), a sensor mounting seat (4), a sonic sensor (5), a sonic focusing chamber (6), a bubble grid (7), a needle valve (8), an exhaust hole (9), a fixed base (10), a filter (11), a quick installation connector (12), a flameproof threading hole (13), a terminal (14), a front cover (15) and a rear cover (16), characterized in that: The upper end of the fixed base (10) is embedded with a sound wave focusing chamber (6), one end of the sound wave focusing chamber (6) is embedded with a bubble grid (7), the upper end of the sound wave focusing chamber (6) is provided with a sensor mounting seat (4), the sensor mounting seat (4) is threadedly connected to the fixed base (10), a sound wave sensor (5) is embedded inside the sensor mounting seat (4), the upper end of the sensor mounting seat (4) is connected to an explosion-proof shell (1), one end of the explosion-proof shell (1) is connected to a connector (2), an sound wave signal conversion module (3) is installed inside the explosion-proof shell (1), a wiring terminal (14) is installed on a side of the explosion-proof shell (1) away from the sound wave signal conversion module (3), one end of the explosion-proof shell (1) is connected to a front end cover (15), and the other end of the explosion-proof shell (1) is connected to a rear end cover (16).

2. The novel explosion-proof sonic pipeline leakage monitor according to claim 1 is characterized by: The lower end of the fixed base (10) is threadedly connected with a quick installation joint (12), and a filter screen (11) is provided at the connection end between the quick installation joint (12) and the fixed base (10).

3. The novel explosion-proof sonic pipeline leakage monitor according to claim 1 is characterized by: A needle valve (8) is threadedly connected to one side end of the fixed base (10), and an exhaust hole (9) is provided at the lower end of the needle valve (8).

4. The novel explosion-proof sonic pipeline leakage monitor according to claim 1 is characterized by: The sensor mounting seat (4) and the sound wave signal conversion module (3) are connected via a coaxial cable.

5. The novel explosion-proof sonic pipeline leakage monitor according to claim 1 is characterized by: A flameproof wire threading hole (13) is provided inside the explosion-proof housing (1).

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