CN219243361U - Underground pipeline infiltration preassembly type detection device based on NMR technology - Google Patents

Abstract

The utility model relates to the field of water conservancy equipment detection, in particular to an underground pipeline water seepage preassembly type detection device based on an NMR technology, which is arranged at a pipeline joint and comprises a water collecting ring buckled at the outer side of a pipeline, wherein the inner surface of the water collecting ring is provided with a water collecting groove, the bottom of the water collecting ring is provided with an opening, the detection device also comprises a connecting bracket connected with the opening, the connecting bracket is provided with a detection groove communicated with the water collecting groove, an NMR detection piece is arranged in the detection groove, and the detection groove is provided with a drainage part communicated with the outside.

Description

Underground pipeline infiltration preassembly type detection device based on NMR technology

Technical Field

The utility model relates to the field of water conservancy equipment detection, in particular to an underground pipeline water seepage preassembly type detection device based on an NMR technology.

Background

Because the buried water pipeline has wide distribution range and complex engineering geological conditions, disasters such as local sedimentation, frost heaving, ice pressure and the like often occur, and the disasters can cause leakage or pipe explosion, thereby causing resource waste and affecting water supply safety. Especially for the pipeline joint position, the pipeline joint position is easy to leak water due to the reasons of loose connection, concentrated stress deformation and the like. Therefore, the method is critical to water leakage detection of the underground water conveying pipeline.

In view of this, some prior art adopts buried type detecting element to detect the water leakage of the water pipe, and the underground drainage pipeline leakage detection method and device disclosed as 2010105668478 are used for measuring the soil resistance above the pipeline through the resistance measuring instrument.

The inventor of the present utility model has inspired the prior art application of NMR (nuclear magnetic resonance) in underground water detection, and has the problem that the NMR detection electrode is directly embedded at the position of a pipeline to detect the change of underground water content when the pipeline leaks and judge whether the pipeline leaks, and the method reduces the influence of underground metal objects, but the direct embedding method also has the influence of precipitation.

Disclosure of Invention

The utility model provides an underground pipeline water seepage preassembly type detection device based on an NMR technology, which effectively solves the problems in the prior art by arranging a water collecting ring and a connecting bracket on a pipeline to collect water leakage at a pipeline joint and monitoring the water leakage through the NMR detection technology.

The technical scheme adopted by the utility model for solving the technical problems is as follows: underground pipe infiltration preassembly detection device based on NMR technique installs in pipeline seam crossing, including the water catch ring of lock in the pipeline outside, the internal surface of water catch ring is equipped with the water catch bowl, the bottom of water catch ring is equipped with the opening, detection device is still including connecting open-ended linking bridge, the linking bridge have with the detection groove of water catch bowl intercommunication, be equipped with NMR detection spare in the detection groove, the detection groove has the external drainage portion of intercommunication.

Further, the connecting bracket is provided with a water storage cavity in the detection groove, the NMR detection piece is installed in the water storage cavity, and the water draining part comprises a water draining hole installed at the bottom of the water storage cavity.

Further, the drain part further comprises a drain pipe communicated with the drain hole, and the drain pipe extends vertically.

Further, the upper end of the drain pipe is provided with a first foam.

Further, the distance between the detection head of the NMR detection piece and the first foam is more than 1cm and less than or equal to 3cm.

Further, the drain pipe is internally provided with a second foam at the lower side of the first foam, and the water permeability of the first foam is smaller than that of the second foam.

Further, the water collecting ring is adhered to the outer side of the pipeline, or the water collecting ring is welded to the outer side of the pipeline.

Further, the water storage cavity is detachably connected with the connecting support.

Further, the water storage cavity is connected with the connecting support through screw threads.

Further, the connecting support is connected with the water collecting ring through hot melting.

The utility model has the beneficial effects that the water leakage at the joint of the converging pipeline of the water collecting ring and the connecting bracket is arranged on the pipeline, and the water leakage is monitored by an NMR detection technology, so that the problems in the prior art are effectively solved.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic side cross-sectional view of the embodiment of FIG. 1 at the water collection ring;

fig. 3 is a partially enlarged schematic structural view of fig. 2 a.

In the figure, 1, a water collecting ring; 2. a water collection tank; 3. an opening; 4. a connecting bracket; 5. a detection groove; 6. an NMR detector; 7. a water storage cavity; 8. a drain hole; 9. a drain pipe; 10. a first foam; 11. a second foam; 12. a pipeline.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.

The embodiment of the utility model is shown in figures 1-3, and the underground pipeline water seepage preassembly type detection device based on the NMR technology is arranged at a joint of a pipeline 12 and comprises a water collecting ring 1 buckled on the outer side of the pipeline 12, wherein the inner surface of the water collecting ring 1 is provided with a water collecting groove 2, the bottom of the water collecting ring 1 is provided with an opening 3, the detection device also comprises a connecting bracket 4 connected with the opening 3, the connecting bracket 4 is provided with a detection groove 5 communicated with the water collecting groove 2, an NMR detection piece 6 is arranged in the detection groove 5, and the detection groove 5 is provided with a drainage part communicated with the outside.

When the underground water pipe detection device is installed, the water collecting ring 1 is buckled at the position where the pipeline 12 is easy to leak water, and the position is usually the joint of the pipeline 12. The connecting bracket 4 is then connected to the opening 3 of the water collection ring 1. During normal use of the pipe 12, no water is present in the detection tank 5, and no water is detected by the NMR detector 6. When water leakage occurs in the pipe 12, water leaking from a position where the pipe 12 is likely to leak flows into the detection tank 5 by the restriction of the water collecting tank 2, and at this time, the NMR detector 6 can detect the water in the detection tank 5 to determine whether the pipe 12 leaks.

The utility model has the technical effects that compared with the existing resistance type detection, the detection by the NMR technology can prevent the iron component from interfering with the detection result; in addition, the water collecting ring 1 and the water collecting tank 2 are arranged, so that the pipeline 12 can be guided to leak water and flow to the detection tank 5, and the problem of lag of detection flowing water at the detection position caused by random diffusion of leaking water can be prevented. The detection groove 5 provided with the water collecting ring 1 and the connecting support 4 can also form separation blocking for natural precipitation so as to reduce interference of external water.

For the technical scheme of the present utility model, the detection technology of the NMR detection piece 6 may be a prior art, and the prior NMR detection technology mainly includes: nuclear magnetic resonance mainly utilizes the characteristic that hydrogen protons can spin, and positively charged hydrogen protons spin to generate a magnetic moment. In natural environment, magnetic moments generated by hydrogen proton spin can cancel each other, so macroscopic magnetic moment is 0, the magnetic moment is not magnetic, after a stable magnetic field is applied to a hydrogen proton system, the spin direction of the hydrogen proton is divided into 2 states, the spin direction is consistent with the main magnetic field direction or opposite to the main magnetic field direction, the quantity of the hydrogen protons in the two directions is different, and then the hydrogen proton system has macroscopic magnetic moment under the action of a stable magnetic field. The hydrogen proton system with macroscopic magnetic moment is applied with a radio frequency electromagnetic wave through the radio frequency electromagnetic wave emission, and hydrogen protons absorb energy under the action of the radio frequency electromagnetic wave to generate resonance. The hydrogen proton resonance generates a specific electromagnetic signal, and then the electromagnetic signal is acquired by an electromagnetic signal collector to obtain the state of whether water leakage exists.

The further optimization of the application lies in that the connecting bracket 4 is provided with a water storage cavity 7 in the detection groove 5, the NMR detection piece 6 is installed in the water storage cavity 7, and the water draining part comprises a water draining hole 8 installed at the bottom of the water storage cavity 7. By providing the drain hole 8, when condensed water or external water seeping in from the inside of the water collecting ring 1, the condensed water can be discharged through the drain hole 8, so as to prevent false detection.

For the embodiment shown in fig. 1, it is further optimized that the drain further comprises a drain pipe 9 communicating with the drain hole 8, the drain pipe 9 extending vertically. By setting the drain pipe 9, when precipitation occurs, the connecting support 4 is positioned at a level, and underground water seepage is prevented from entering the detection groove 5 through the drain hole 8.

A further optimization of the utility model is that the upper end of the drain pipe 9 is provided with a first foam 10. By arranging the first foam 10, the water discharge speed can be slowed down when water leakage occurs in the pipeline 12, so that enough water is rapidly accumulated at the position of the first foam 10 for the NMR detection part 6 to detect, and the situation that accumulated water caused by continuous discharge of discharged water to the drain pipe 9 is insufficient for being monitored by the NMR detection part 6 when the water leakage amount of the pipeline 12 is small is prevented. Meanwhile, the first foam 10 can timely discharge a small amount of interference water such as condensed water and seepage water of the pipeline 12.

The utility model is further optimized in that the distance between the detection head of the NMR detection element 6 and the first foam 10 is more than 1cm and less than or equal to 3cm. With this arrangement, it is possible to prevent erroneous detection of the NMR detecting member 6 when a small amount of condensed water or external water is discharged, and also to prevent the problem of detection insensitivity due to an excessively high height of the detecting head of the NMR detecting member 6.

A further optimization of the present utility model is that a second foam 11 is disposed in the drain pipe 9 below the first foam 10, and the water permeability of the first foam 10 is smaller than the water permeability of the second foam 11. By providing the second foam 11, it is possible to prevent soil from rushing into the water storage chamber 7 from the drain bottom pipe, to further prevent the water storage chamber 7 from fouling.

For the installation of the water collection ring 1, in a preferred embodiment, it is further specified that the water collection ring 1 is glued outside the pipe 12 or that the water collection ring 1 is welded outside the pipe 12.

A further development of the utility model is that the water reservoir 7 is detachably connected to the connecting support 4. Through the detachable setting of water storage chamber 7 and linking bridge 4, can conveniently install water storage chamber 7 and NMR monitoring part, can also conveniently later maintenance NMR detection part 6.

Further specifically, the water storage cavity 7 is screwed and connected with the connecting bracket 4 through threads. As shown in fig. 3, a threaded inner cylinder is arranged at the bottom of the connecting bracket 4, and the upper section of the water storage cavity 7 is screwed on the threaded inner cylinder.

For the connection of the connection bracket 4 to the water collection ring 1, it is preferable that the connection bracket 4 is connected to the water collection ring 1 by heat fusion.

The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.

The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

Claims (10)

1. The utility model provides an underground pipe infiltration preassembly detection device based on NMR technique installs in pipeline seam crossing, its characterized in that, including the water catch ring of lock in the pipeline outside, the internal surface of water catch ring is equipped with the water catch bowl, the bottom of water catch ring is equipped with the opening, detection device is still including connecting open-ended linking bridge, the linking bridge have with the detection groove of water catch bowl intercommunication, be equipped with NMR detection spare in the detection groove, the detection groove has the external drainage portion of intercommunication.

2. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 1, wherein: the connecting support is provided with a water storage cavity in the detection groove, the NMR detection piece is installed in the water storage cavity, and the water draining part comprises a water draining hole installed at the bottom of the water storage cavity.

3. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 2, wherein: the drain portion further comprises a drain pipe communicated with the drain hole, and the drain pipe extends vertically.

4. A pre-installed detection device for water seepage of underground pipeline based on NMR technique according to claim 3, wherein: the upper end of the drain pipe is provided with a first foam.

5. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 4, wherein: the distance between the detection head of the NMR detection piece and the first foam is more than 1cm and less than or equal to 3cm.

6. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 4, wherein: the drain pipe is internally provided with second foam at the lower side of the first foam, and the water permeability of the first foam is smaller than that of the second foam.

7. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 1, wherein: the water collecting ring is adhered to the outer side of the pipeline, or the water collecting ring is welded to the outer side of the pipeline.

8. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 2, wherein: the water storage cavity is detachably connected with the connecting support.

9. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 8, wherein: the water storage cavity is connected with the connecting bracket through screw threads.

10. The underground pipeline water seepage preassembly type detection device based on the NMR technology according to claim 1, wherein: the connecting support is connected with the water collecting ring through hot melting.

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