CN112780955A - Pipeline leakage signal vibration trigger device and conversion method - Google Patents

Abstract

The invention discloses a pipeline leakage signal vibration trigger device and a conversion method, wherein the device comprises: the positive trigger electrode is connected to the positive electrode of the button battery through a lead, and the negative trigger electrode is connected to the negative electrode of the button battery through a lead and a vibration motor; the telescopic push rod is located the filter screen with between the elastic diaphragm, the elastic diaphragm opposite side has set gradually negative trigger electrode, positive trigger electrode button battery with vibrating motor. The method comprises the following steps: fixing the distributed optical cable on the outer surface of the pipeline, and then installing the vibration trigger device on the distributed optical cable, wherein the vibration trigger device is positioned at a pipeline bell and spigot during installation; the vibration trigger device converts the leakage signal into a vibration signal to trigger the distributed optical cable to vibrate, so that the leakage point is positioned through the optical cable vibration signal.

Description

Pipeline leakage signal vibration trigger device and conversion method

Technical Field

The invention relates to the field of pipeline leakage detection, in particular to a pipeline leakage signal vibration trigger device and a conversion method.

Background

In urban water delivery networks, daily maintenance and troubleshooting of various pipelines buried underground are indispensable works. Especially, the positioning of micro-leakage and seepage of the pipeline becomes the center of gravity of research of various pipeline detection methods. The current main method for detecting the leakage of the water pipeline is acoustic detection (including internal hearing and external hearing). However, this method cannot be used to accurately locate a leak in a small amount or in the event of a leak in the pipe.

Distributed optical cable early warning systems have long played an important role in petroleum pipeline monitoring and early warning. However, the method can only detect vibration signals with distinct characteristics, such as manual excavation, pipe bursting and the like, and is not popularized to a detection task of leakage of a water pipeline at present, particularly to positioning of micro leakage and seepage of the pipeline.

Disclosure of Invention

The invention provides a pipeline leakage signal vibration triggering device and a conversion method, the invention designs a leakage triggering vibration device by utilizing the characteristic that a distributed optical cable is sensitive to a vibration signal and based on the idea of converting the leakage signal into the vibration signal, and the device is used for triggering the vibration of the distributed optical cable, thereby improving the sensitivity of a distributed optical cable early warning system when the distributed optical cable early warning system is used for detecting the leakage of a water pipeline, and the detailed description is as follows:

in a first aspect, a pipe leakage signal vibration trigger device comprises: a shell body, a plurality of first connecting rods and a plurality of second connecting rods,

an upper cover is arranged above the shell, a bottom cover is arranged at the bottom of the shell, and a water inlet hole and a filter screen are arranged on one side of the shell;

the shell is internally provided with a button battery, a vibration motor, a positive trigger electrode, a negative trigger electrode, an elastic membrane and a telescopic push rod;

the positive trigger electrode is connected to the positive electrode of the button battery through a lead, and the negative trigger electrode is connected to the negative electrode of the button battery through a lead and a vibration motor;

the telescopic push rod is located the filter screen with between the elastic diaphragm, the elastic diaphragm opposite side has set gradually negative trigger electrode, positive trigger electrode button battery with vibrating motor.

Preferably, the elastic membrane is made of a TPE elastic material.

In a second aspect, a method of converting a pipeline leakage signal, the method comprising the steps of:

fixing the distributed optical cable on the outer surface of the pipeline, and then installing the vibration trigger device on the distributed optical cable, wherein the vibration trigger device is positioned at a pipeline bell and spigot during installation;

the vibration trigger device converts the leakage signal into a vibration signal to trigger the distributed optical cable to vibrate, so that the leakage point is positioned through the optical cable vibration signal.

Wherein the content of the first and second substances,

moisture in the soil passes through the filter screen from the water inlet hole to filter impurities and then reaches the cavity where the telescopic push rod is located;

the telescopic push rod is composed of water-absorbing expansion rubber, and the structure expands when meeting water to push the elastic diaphragm to move towards the negative trigger electrode;

the elastic membrane is contacted with the negative trigger electrode and then transmits acting thrust to push the negative trigger electrode to move and contact with the positive trigger electrode to form a closed loop; the vibration motor works to drive the distributed optical cable to vibrate.

Preferably, the number of the vibration inducing means installed is determined by the total length of the distribution optical cable.

The technical scheme provided by the invention has the beneficial effects that:

1. the invention avoids various defects of the traditional positioning method, designs a device based on leakage induced vibration and is used for exciting the vibration of the distributed optical cable;

2. the invention can convert the leakage signal into the distributed pipeline vibration signal, thereby realizing the purpose of positioning the leakage point by using the distributed optical cable.

Drawings

FIG. 1 is a schematic view of a vibration-inducing device mounted on a distribution cable;

FIG. 2 is a view showing the internal structure of the vibration trigger device;

fig. 3 is a layout view of the vibration trigger device on the pipeline.

In the drawings, the components are represented in the following list:

1: an upper cover; 2: a water inlet hole;

3: a distributed optical cable; 4: a bottom cover;

5: a housing; 6: a button cell;

7: a vibration motor; 8: a positive trigger electrode;

9: a negative trigger electrode; 10: an elastic diaphragm;

11: a telescopic push rod; 12: filtering with a screen;

13: a pipeline; 14: a pipeline bell and spigot;

15: and (5) vibrating the trigger device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below.

Example 1

In order to achieve the above purpose, referring to fig. 1 and 2, an embodiment of the present invention provides a vibration trigger device, which adopts a technical solution to convert a leakage signal into a vibration signal, so as to trigger vibration of a distributed optical cable, thereby locating a leakage point through the optical cable vibration signal.

Referring to fig. 1 and 2, the vibration trigger device 15 mainly includes: the device comprises an upper cover 1, a water inlet 2, a bottom cover 4, a shell 5, a button battery 6, a vibration motor 7, a positive trigger electrode 8, a negative trigger electrode 9, an elastic membrane 10, a telescopic push rod 11 and a filter screen 12.

Inlet opening 2 is located one side of casing 5, filter screen 12 is located 5 inside inlet opening 2 of laminating simultaneously of casing, telescopic push rod 11 is located between filter screen 12 and the elastic diaphragm 10, elastic diaphragm 10 opposite side is fixed negative trigger electrode 9 in proper order, positive trigger electrode 8, button cell 6 and vibrating motor 7, positive trigger electrode 8 is connected to button cell 6's positive pole through the wire, negative trigger electrode 9 passes through the wire and is connected to button cell 6's negative pole through vibrating motor 7, button cell 6, vibrating motor 7, positive trigger electrode 8, negative trigger electrode 9, elastic diaphragm 10, telescopic push rod 11, filter screen 12 is located the inside of casing 5. The upper cover 1 is positioned above the housing 5, and the bottom cover 4 is positioned at the bottom of the housing 5.

During the concrete realization, above-mentioned button cell 6 adopts the model of ARTHYLY brand to be CR 1220's battery, and vibrating motor 7 adopts the 0830 motor of TEJIATE brand, and elastic diaphragm adopts TPE elastic material, and flexible push rod 11 adopts the water-swelling rubber of Ruida rubber and plastic brand as the raw materials, and filter screen 12 adopts the sidebao to spout the cloth filter screen of borduring.

In the embodiment of the present invention, except for the specific description of the model of each device, the model of other devices is not limited, as long as the device can perform the above functions.

Example 2

The embodiment of the invention provides a pipeline leakage signal conversion method, and referring to fig. 3, the method comprises the following steps:

the technical characteristics involved in realizing the positioning method mainly include the following: the distribution optical cable 3, the pipe 13, the pipe socket 14 (pipe-inherent interface), and the vibration-inducing device 15 in embodiment 1.

The implementation method comprises the following steps:

the distribution cable 3 is first secured to the outer surface of the pipe 13 and the vibration inducing device 15 is then installed on the distribution cable 3 as shown in fig. 3. When the device is installed, the vibration trigger device 15 is ensured to be positioned at the pipeline socket 14.

Specifically, in practical application, the bottom cover 4 is first unloaded, the distributed optical cable 3 is clamped in the U-shaped groove below the vibration trigger device 15, and the bottom cover 4 is installed.

Further, the number of vibration generating devices 15 installed is determined by the total length of the distribution cable 3. Assuming that the total length of the distribution optical cable 3 is 10 km and each section of the pipe 13 is 10 m long, the number of installations can be calculated to be 1000.

When a leak occurs at a pipe socket 14 where the surrounding soil is filled with a leakage water, the vibration-inducing device 15 installed on the distribution type optical fiber cable 3 is soaked in the water. At this time, the vibration triggering device 15 is triggered to generate mechanical vibration, which drives the distribution optical cable 3 to vibrate therewith. The vibration signal is transmitted to an upper computer by the distributed optical cable 3 as a leakage signal at the pipe socket 14, thereby judging the accurate position thereof.

The working principle of the vibration device is as follows: when the vibration trigger device 15 is soaked in the leakage water, the water in the soil passes through the filter screen 12 from the water inlet hole 2 to filter impurities and then reaches the chamber where the telescopic push rod 11 is located. The telescopic push rod 11 is made of water-absorbing expansion rubber, the structure expands after meeting water, the elastic membrane 10 beside the telescopic push rod is pushed to move towards the negative trigger electrode 9, and the elastic membrane 10 transmits action thrust after contacting the negative trigger electrode 9, so that the negative trigger electrode 9 is pushed to move and is contacted with the positive trigger electrode 8. The positive trigger electrode 8 is connected to the positive electrode of the button cell 6 through a lead, and the negative trigger electrode 9 is connected to the negative electrode of the button cell 6 through the vibration motor 7 to form a closed loop. After the anode and the cathode are contacted, the whole loop generates current, and the vibration motor 7 works, so that the vibration trigger device 15 drives the distributed optical cable 3 to vibrate.

The frequency of the vibration of the distributed optical cable 3 is determined by the frequency of the vibration motor 7, the vibration frequency of the vibration motor in the embodiment of the present invention is illustrated by taking 180Hz/s as an example, and the embodiment of the present invention is not limited thereto.

Those skilled in the art will appreciate that the drawings are only schematic illustrations of preferred embodiments, and the above-described embodiments of the present invention are merely provided for description and do not represent the merits of the embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

1. A pipeline leak signal vibration trigger device, the vibration trigger device comprising: a shell body, a plurality of first connecting rods and a plurality of second connecting rods,

an upper cover is arranged above the shell, a bottom cover is arranged at the bottom of the shell, and a water inlet hole and a filter screen are arranged on one side of the shell;

the shell is internally provided with a button battery, a vibration motor, a positive trigger electrode, a negative trigger electrode, an elastic membrane and a telescopic push rod;

the positive trigger electrode is connected to the positive electrode of the button battery through a lead, and the negative trigger electrode is connected to the negative electrode of the button battery through a lead and a vibration motor;

the telescopic push rod is located the filter screen with between the elastic diaphragm, the elastic diaphragm opposite side has set gradually negative trigger electrode, positive trigger electrode button battery with vibrating motor.

2. The vibration trigger device according to claim 1, wherein the elastic membrane is made of TPE elastic material.

3. A method of converting a pipeline leakage signal, the method being based on the vibration-triggered device of claim 1, the method comprising the steps of:

fixing the distributed optical cable on the outer surface of the pipeline, and then installing the vibration trigger device on the distributed optical cable, wherein the vibration trigger device is positioned at a pipeline bell and spigot during installation;

the vibration trigger device converts the leakage signal into a vibration signal to trigger the distributed optical cable to vibrate, so that the leakage point is positioned through the optical cable vibration signal.

4. The pipeline leakage signal conversion method of claim 3,

moisture in the soil passes through the filter screen from the water inlet hole to filter impurities and then reaches the cavity where the telescopic push rod is located;

the telescopic push rod is composed of water-absorbing expansion rubber, and the structure expands when meeting water to push the elastic diaphragm to move towards the negative trigger electrode;

the elastic membrane is contacted with the negative trigger electrode and then transmits acting thrust to push the negative trigger electrode to move and contact with the positive trigger electrode to form a closed loop; the vibration motor works to drive the distributed optical cable to vibrate.

5. The method of claim 3, wherein the number of vibration-inducing devices installed is determined by the total length of the distribution cable.

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