CN110749921A - Portable detection device for blockage of exposed filling pipeline and dredging method - Google Patents

Abstract

A portable detection device for blockage of exposed filling pipes, comprising a C-shaped split ring, a plurality of threaded mounting holes are set on the split ring, and an ultrasonic receiving probe and an ultrasonic resonance contact are inserted into the mounting holes, and the ultrasonic receiving probe and the ultrasonic resonance contact are inserted. The head is slidingly matched with the outer wall of the pipeline; the ultrasonic receiving probe and the ultrasonic resonance contact are connected with an integrated controller; a method for dredging and dredging an exposed filling pipeline includes the following steps: collecting reference data; determining the blocking position; clearing the blocking: for the blocking position , using the resonant frequency of the corresponding filling material after curing, start the ultrasonic frequency conversion vibration component and the ultrasonic vibration test component to continuously scan the outer wall of the pipeline at the blocked position, and the solids in the pipeline are broken until the pipeline is dredged. Other changes can easily detect and clear the blockage in the pipeline.

Description

A portable detection device and dredging method for blockage of an exposed filling pipeline

technical field

The invention relates to a pipeline detection device and a dredging method, in particular to a portable detection device and a dredging method for blockage of an exposed filling pipeline, belonging to the technical field of blockage detection and dredging of an exposed filling pipeline.

Background technique

Compared with traditional mining, backfill mining has the advantages of reducing gangue efflux, avoiding surface deformation and subsidence, groundwater loss and realizing low-loss mining like traditional mining. It is an environment-friendly and prospective resource-saving mining method. Coal mining method.

However, during the operation of the filling system, the most prominent defect is that the filling efficiency cannot keep up with the resource extraction efficiency, resulting in low filling and extraction efficiency. The reasons for the low filling efficiency are not only that the filling materials themselves, such as paste and colloid filling materials, take a certain amount of time to harden after filling, and the blockage of the filling pipeline is another important factor that reduces the filling efficiency. , Unclogging the blocked point is time-consuming and labor-intensive, and will limit the conveying speed of the filling material to a certain extent.

Commonly used methods for finding blocked parts include pipe dismantling method and pressure monitoring method. For short-distance filling pipelines, it is still possible to implement, but many difficulties need to be overcome. For long-distance filling material transportation pipelines, These methods will be more difficult to implement, and will greatly increase the operating cost. Therefore, there is no reliable and simple detection device and fast and efficient dredging method to solve the problem of blockage of exposed filling pipes such as paste and colloid. .

SUMMARY OF THE INVENTION

In view of the above problems in the prior art, the present invention provides a portable detection device for blockage of an exposed filling pipeline and a method for dredging it. The device is easy to carry, has intuitive information display, does not need to make other changes to the original pipeline system, and can easily detect the inside of the pipeline. The blockage is detected and dredged; the dredging method is simple and easy to operate, and does not interfere or damage the system integrity of the pipeline.

In order to achieve the above object, the present invention provides a portable detection device for blockage of an exposed filling pipe, comprising a C-shaped split ring, the width of the open end of which is not less than the outer diameter of the pipe, the inner diameter of the split ring is greater than the outer diameter of the pipe; the lower end of the split ring is connected with a handle;

The split ring is provided with a plurality of threaded installation holes, one of which is installed with an ultrasonic receiving probe, and the other installation holes are respectively installed with ultrasonic resonance contacts. The ultrasonic receiving probe and the ultrasonic resonance contact are connected to the outer wall of the pipeline. Sliding fit; the ultrasonic receiving probe and ultrasonic resonance contact are both connected with the integrated controller;

The integrated controller includes an ultrasonic frequency conversion vibration component, an ultrasonic vibration test component, a controller and a display screen, and the ultrasonic frequency conversion vibration component includes an ultrasonic resonance contact, an ultrasonic vibrator, an ultrasonic generator and an ultrasonic transducer connected in sequence;

The ultrasonic vibration test assembly includes an ultrasonic receiving probe and a measuring sensor connected in sequence;

Both the ultrasonic transducer and the measurement sensor are connected with the controller.

Further, the ultrasonic vibration test assembly further includes a filtering device, and the filtering device is connected with the ultrasonic receiving probe.

Further, the ultrasonic resonance contacts are provided with three, and are distributed at equal intervals along the split ring, and the ultrasonic receiving probe is provided with one, located between any two ultrasonic resonance contacts; the ultrasonic resonance contact and the ultrasonic receiving probe are provided. The part near the pipe is hemispherical.

Further, the measurement sensor is a piezoelectric vibration sensor, and the measurement displacement range is 0.001-4.000 mm, the speed range is 0.1-400.0 mm/s, and the acceleration range is 0.1-400.0 m/s ² .

Further, the vibration frequency of the ultrasonic vibrator in the ultrasonic frequency conversion vibration component is 15Hz～30MHz.

By utilizing the resonance principle, the invention combines the characteristics of adjustable frequency band, strong penetrability and constant frequency of ultrasonic waves passing through different media, setting a split ring that can be directly fitted outside the pipe, and inserting and integrating control on the split ring The ultrasonic receiving probe and ultrasonic resonance probe connected to the device are respectively used for the generation and capture of ultrasonic frequency, and the spectrum signal is visually displayed through the integrated controller display screen, and the blockage position is determined by the different forms of the generated spectrum signal segment. It provides a reliable basis for accurate dredging. The portable detection device has a simple structure, is easy to operate, has high detection efficiency, and has a good dredging effect, and no other changes are required to the original pipeline system, which realizes convenient detection of blockage in the pipeline. and nondestructive dredging.

A method for blocking and dredging an exposed filling pipeline, comprising the following steps:

(1) Collect reference data: prepare solid samples of various specific filling materials, use the resonance method to start the ultrasonic frequency conversion vibration component to form ultrasonic waves, and start the ultrasonic vibration test component to receive and display ultrasonic waves to obtain solid samples that cause The resonance frequency of the resonance is recorded and recorded;

Simulate the circulation environment in the pipeline filled with various specific filling materials, use the resonance method to start the ultrasonic frequency conversion vibration component to form ultrasonic waves, and start the ultrasonic vibration test component to receive and display ultrasonic waves to obtain the excitation that causes the fluid resonance in the pipeline. frequency and record;

(2) determine the blockage position: set the excitation frequency of the fluid resonance measured in step (1) as the excitation frequency of the detection device, start the ultrasonic frequency conversion vibration assembly and the ultrasonic vibration test assembly, and adjust the frequency of the ultrasonic resonance contact to excite the frequency value, slide and clamp the portable detection device on the outer wall of the pipeline from the opening of the split ring, and move the portable detection device with the handle to scan and detect the pipeline;

The fluid in the pipeline resonates under the action of the excitation frequency of the detection device. The resonance signal is captured by the ultrasonic receiving probe, converted by the measurement sensor, and sent to the controller. The display screen displays a large and stable spectrum or amplitude digital signal in real time;

Continue to move the portable detection device. When the spectrum or amplitude digital signal on the display screen starts to change significantly, that is, when the amplitude is no longer stable and the amplitude decreases, it means that the material in the pipeline of the detected part is no longer a fluid, but a solid that causes blockage. , continue to move and scan until a large and stable spectrum or amplitude digital signal reappears on the display screen, then it can be determined that the part between these two large and stable spectrum signals is the blockage position;

(3) Clear the blockage: For the blockage position determined in step (2), use the resonance frequency of the corresponding filling material obtained in step (1) after curing, start the ultrasonic frequency conversion vibration component and the ultrasonic vibration test component, and adjust the ultrasonic resonance contact. After the ultrasonic frequency of the filling material is consistent with the resonant frequency of the filling material after solidification, the outer wall of the pipeline at the blocked position is continuously scanned, so that the solids in the pipeline are loose and broken, and the broken solids are continuously dispersed by the fluid in the pipeline until the pipeline is dredged.

Further, in the described step (2) and step (3), in order to reduce the resistance between the ultrasonic receiving probe and the ultrasonic resonance contact and the outer wall of the pipeline, the ultrasonic receiving probe and the ultrasonic resonance contact are lubricated before use. .

Further, the ultrasonic receiving probe and the ultrasonic resonance contact can be adjusted in quantity and position according to the actual frequency, and the distance between the ultrasonic receiving probe and the ultrasonic resonance contact from the pipeline can be rotated deep or shallow on the split ring thread. Adjust the distance inside the mounting hole.

This dredging method uses the principle that the frequency of sound waves does not change when propagating in different media, collects reference data and uses the corresponding reference frequency for detection, so as to determine the blockage position, and uses the resonance method to activate the ultrasonic resonance contact in the detection device to correct the blockage. The solids at the location are loosely broken, and the pipeline can be dredged quickly and efficiently without any damage to the original pipeline system.

Description of drawings

Fig. 1 is the structural representation of detection device in the present invention;

Fig. 2 is the sectional view of the detection device in the present invention;

Fig. 3 is the initial state schematic diagram of blocking and clearing;

Fig. 4 is the schematic diagram of the intermediate state of blocking and dredging;

Fig. 5 is a schematic diagram of the final state of blockage clearing.

In the picture: 1. Split ring, 2. Pipe, 3. Handle, 4. Mounting hole, 5. Ultrasonic receiving probe, 6. Ultrasonic resonance contact, 7. Integrated controller, 8. Display screen.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a portable detection device for the blockage of an exposed filling pipe includes a C-shaped split ring 1, the width of its open end is not less than the outer diameter of the pipe 2, and the inner diameter of the split ring 1 is greater than the outer diameter of the pipe 2 ; The lower end of the split ring 1 is connected with a handle 3;

A plurality of threaded mounting holes 4 are opened on the split ring 1, and an ultrasonic receiving probe 5 is installed in one of the mounting holes 4, and ultrasonic resonance contacts 6 are respectively installed in the remaining installation holes 4. The ultrasonic receiving probe 5 and the ultrasonic wave The resonance contact 6 is slidingly matched with the outer wall of the pipeline 2; the ultrasonic receiving probe 5 and the ultrasonic resonance contact 6 are both connected with the integrated controller 7;

The described integrated controller 7 includes an ultrasonic frequency conversion vibration assembly, an ultrasonic vibration test assembly, a controller and a display screen 8, and the ultrasonic frequency conversion vibration assembly includes an ultrasonic resonance contact 6, an ultrasonic vibrator, an ultrasonic generator and an ultrasonic transducer that are connected in turn. device;

The ultrasonic vibration test assembly includes the ultrasonic receiving probe 5 and the measurement sensor connected in sequence;

Both the ultrasonic transducer and the measurement sensor are connected with the controller.

In order to filter out interfering waves outside a specific frequency band to improve ultrasonic frequency receiving accuracy, the ultrasonic vibration test assembly further includes a filtering device, and the filtering device is connected to the ultrasonic receiving probe 5 .

Preferably, three ultrasonic resonance contacts 6 are provided, and they are equally spaced along the split ring 1, and one ultrasonic receiving probe 5 is provided, located between any two ultrasonic resonance contacts 6; the ultrasonic resonance contacts 6 and the part of the ultrasonic receiving probe 5 close to the pipeline 2 are hemispherical.

In order to improve the accuracy of the vibration test, the measurement sensor is a piezoelectric vibration sensor, the displacement range of its measurement is 0.001~4.000mm, the speed range is 0.1~400.0mm/s, and the acceleration range is 0.1~400.0m/s ² .

In order to ensure the breadth of the frequency adjustment range of the ultrasonic frequency conversion vibration component, the vibration frequency of the ultrasonic vibrator in the ultrasonic frequency conversion vibration component is 15Hz-30MHz.

By utilizing the resonance principle, the invention combines the characteristics of adjustable frequency band, strong penetrability and constant frequency of ultrasonic waves passing through different media, setting a split ring that can be directly fitted outside the pipe, and inserting and integrating control on the split ring The ultrasonic receiving probe and ultrasonic resonance probe connected to the device are respectively used for the generation and capture of ultrasonic frequency, and the digital signal of the spectrum or amplitude is visually displayed on the display screen of the integrated controller. The determination of the position provides a reliable basis for accurate dredging. The portable detection device has a simple structure, is easy to operate, has high detection efficiency, and has a good dredging effect, and no other changes are required to the original pipeline system. For easy detection and non-destructive dredging.

A method for blocking and dredging an exposed filling pipeline, comprising the following steps:

(1) Collect reference data: prepare solid samples of various specific filling materials, use the resonance method to start the ultrasonic frequency conversion vibration component to form ultrasonic waves, and start the ultrasonic vibration test component to receive and display ultrasonic waves to obtain solid samples that cause The resonance frequency of the resonance is recorded and recorded;

Simulate the circulation environment in the pipeline 2 filled with various specific filling materials, use the resonance method to start the ultrasonic frequency conversion vibration component to form ultrasonic waves, and start the ultrasonic vibration test component to receive and display ultrasonic waves, and obtain the fluid resonance caused by the pipeline 2. the excitation frequency and record;

Regardless of whether it is filled with paste or colloid, the composition and ratio of materials used by different units in different regions are different, the properties of fluid materials and materials after curing are also different, and the natural vibration frequencies are also different. Therefore, the above frequency test and Record.

(2) determine the blocking position: the excitation frequency of the fluid resonance measured in step (1) is set as the excitation frequency of the detection device, start the ultrasonic frequency conversion vibration assembly and the ultrasonic vibration test assembly, and adjust the frequency of the ultrasonic resonance contact 6 to be Excite the frequency value, slide the portable detection device onto the outer wall of the pipeline 2 from the opening of the split ring, move the portable detection device with the handle 3, and scan and detect the pipeline 2;

The fluid in the pipeline 2 resonates under the action of the excitation frequency of the detection device. The resonance signal is captured by the ultrasonic receiving probe 5, converted by the measurement sensor, and sent to the controller. The display screen 8 displays a large and stable spectrum or amplitude in real time. Digital signal;

Continue to move the portable detection device. When the spectrum or amplitude digital signal on the display screen 8 begins to change, that is, when the amplitude is no longer stable and the amplitude decreases, it means that the material in the pipeline 2 of the detected part is no longer fluid, but causes blockage. solid, continue to move and scan until the large and stable spectrum or amplitude digital signal appears again on the display screen 8, then it can be determined that the part between these two large and stable spectrum signals is the blockage position;

(3) Clear the blockage: For the blockage position determined in step (2), use the resonance frequency of the corresponding filling material obtained in step (1) after curing, start the ultrasonic frequency conversion vibration component and the ultrasonic vibration test component, and adjust the ultrasonic resonance contact. After the ultrasonic frequency of 6 is consistent with the resonant frequency of the filling material after curing, continuously scan the outer wall of the pipeline 2 at the blocked position, so that the solid in the pipeline 2 is loose and broken, and the broken solid is continuously dispersed by the fluid in the pipeline 2 until the pipeline 2 is dredged. .

As shown in Figure 3, in the state of ultrasonic excitation resonance, the blocking body is loosened and begins to break, and the size of the blocking body begins to decrease; Pipeline 2 is dredged; as shown in Figure 5, the broken small-sized blocks are loosened under the impulse of fluid in the pipeline and move together toward the outlet, and finally complete the complete dredging of pipeline 2.

In order to obtain the best dredging effect, the ultrasonic resonant contact 6 is in contact with the outer wall of the pipeline 2 to dredge.

In order to reduce the resistance between the ultrasonic receiving probe 5 and the ultrasonic resonance contact 6 and the outer wall of the pipeline 2, in steps (2) and (3), the ultrasonic receiving probe 5 and the ultrasonic resonance contact 6 are lubricated before use.

The ultrasonic receiving probe 5 and the ultrasonic resonance contact 6 can be adjusted in quantity and position according to the actual frequency. The distance between the ultrasonic receiving probe 5 and the ultrasonic resonance contact 6 from the pipe 2 can be installed on the split ring thread by turning deep or shallow. The depth inside the hole 4 is adjusted.

This dredging method uses the principle that the frequency of sound waves does not change in different media, collects reference data to determine the blockage position, and uses the resonance method to start the ultrasonic resonance contact in the detection device to loosen and break the solid in the blockage position. On the premise of no damage to the original pipeline system, the pipeline can be dredged quickly and efficiently.

Claims (8)

1. A portable detection device for the blockage of an exposed filling pipeline is characterized by comprising a C-shaped open ring (1), wherein the width of the open end of the C-shaped open ring is not less than the outer diameter of a pipeline (2), and the inner diameter of the open ring (1) is greater than the outer diameter of the pipeline (2); the lower end of the split ring (1) is connected with a handle (3);

a plurality of threaded mounting holes (4) are formed in the split ring (1), an ultrasonic receiving probe (5) is mounted in one mounting hole (4), ultrasonic resonance contacts (6) are mounted in the rest mounting holes (4), and the ultrasonic receiving probe (5) and the ultrasonic resonance contacts (6) are in sliding fit with the outer wall of the pipeline (2); the ultrasonic receiving probe (5) and the ultrasonic resonance contact (6) are both connected with an integrated controller (7);

the integrated controller (7) comprises an ultrasonic frequency conversion vibration assembly, an ultrasonic vibration testing assembly, a controller and a display screen (8), wherein the ultrasonic frequency conversion vibration assembly comprises an ultrasonic resonance contact (6), an ultrasonic vibrator, an ultrasonic generator and an ultrasonic transducer which are sequentially connected;

the ultrasonic vibration testing assembly comprises an ultrasonic receiving probe (5) and a measuring sensor which are sequentially connected;

the ultrasonic transducer and the measuring sensor are both connected with the controller.

2. The portable exposed filling pipe blockage detection device according to claim 1, wherein the ultrasonic vibration test assembly further comprises a filter device, and the filter device is connected with the ultrasonic receiving probe (5).

3. An exposed filling pipe blockage portable detection device as claimed in claim 1 or 2, wherein the number of the ultrasonic resonance contacts (6) is three, the ultrasonic resonance contacts are distributed at equal intervals along the split ring (1), and one ultrasonic receiving probe (5) is arranged between any two ultrasonic resonance contacts (6); the parts of the ultrasonic resonance contact (6) and the ultrasonic receiving probe (5) close to the pipeline (2) are all hemispherical.

4. An exposed filling pipe plugging chamber as claimed in claim 3The portable detection device is characterized in that the measuring sensor is a piezoelectric vibration sensor, the displacement range of the measuring sensor is 0.001-4.000 mm, the speed range is 0.1-400.0 mm/s, and the acceleration range is 0.1-400.0 m/s²。

5. The portable exposed filling pipe blockage detection device according to claim 3, wherein the vibration frequency of the ultrasonic vibrator in the ultrasonic variable frequency vibration assembly is 15Hz to 30 MHz.

6. The method for dredging the blockage of the exposed filling pipeline is characterized by comprising the following steps of:

(1) collecting reference data: preparing solid samples of various specific filling materials, starting an ultrasonic frequency conversion vibration assembly to form ultrasonic waves by using a resonance method, and simultaneously starting an ultrasonic vibration testing assembly to receive and display the ultrasonic waves to obtain and record the resonance frequency causing the solid samples to resonate;

simulating the circulation environment in the pipeline (2) filled with various specific filling materials, starting an ultrasonic frequency conversion vibration assembly to form ultrasonic waves by using a resonance method, and simultaneously starting an ultrasonic vibration testing assembly to receive and display the ultrasonic waves to obtain and record the excitation frequency causing the fluid resonance in the pipeline (2);

(2) judging the blocking position: setting the excitation frequency of the fluid resonance measured in the step (1) as the excitation frequency of a detection device, starting an ultrasonic frequency conversion vibration component and an ultrasonic vibration testing component, adjusting the frequency of an ultrasonic resonance contact (6) as the excitation frequency value, slidably clamping the portable detection device on the outer wall of the pipeline (2) from the opening of the split ring (1), and moving the portable detection device by holding a handle (3) to scan and detect the pipeline (2);

the fluid in the pipeline (2) generates resonance under the action of the excitation frequency of the detection device, a resonance signal is captured by the ultrasonic receiving probe (5), converted by the measuring sensor and transmitted to the controller, and a spectrum or an amplitude digital signal with larger and stable amplitude is displayed on the display screen (8) in real time;

when the spectrum or amplitude digital signal on the display screen (8) begins to obviously change in a large scale, namely the amplitude is not stable any more and the amplitude is reduced, the material in the pipeline (2) of the detected part is not fluid any more but solid which causes blockage, the portable detection device is continuously moved and scanned until the spectrum or amplitude digital signal with larger amplitude appears on the display screen (8) again, and the part between the two sections of spectrum or amplitude digital signals with larger amplitude and stability can be judged as the blockage position;

(3) dredging blockage: and (3) starting the ultrasonic frequency conversion vibration component and the ultrasonic vibration testing component according to the resonance frequency of the solidified corresponding filling material obtained in the step (1) at the blockage position determined in the step (2), adjusting the ultrasonic frequency of the ultrasonic resonance contact (6) to be consistent with the resonance frequency of the solidified filling material, and continuously scanning the outer wall of the pipeline (2) at the blockage position to enable the solid in the pipeline (2) to be loose and crushed, wherein the crushed solid is continuously dispersed by the fluid in the pipeline (2) until the pipeline (2) is dredged.

7. The method for dredging the blockage of the exposed filling pipeline according to claim 6, wherein in the step (2) and the step (3), the ultrasonic receiving probe (5) and the ultrasonic resonance contact (6) are lubricated.

8. The method for dredging the blockage of the exposed filling pipeline according to the claim 6 or 7, characterized in that the quantity and the position of the ultrasonic receiving probe (5) and the ultrasonic resonance contact (6) can be adjusted according to the actual frequency requirement, and the distance between the ultrasonic receiving probe (5) and the ultrasonic resonance contact (6) and the pipeline (2) can be adjusted by screwing the depth or screwing the depth of the ultrasonic receiving probe and the ultrasonic resonance contact in the threaded mounting hole (4) of the split ring (1).

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