CN114278879B - Pipeline leakage detection device - Google Patents
Pipeline leakage detection device Download PDFInfo
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- CN114278879B CN114278879B CN202111579853.1A CN202111579853A CN114278879B CN 114278879 B CN114278879 B CN 114278879B CN 202111579853 A CN202111579853 A CN 202111579853A CN 114278879 B CN114278879 B CN 114278879B
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- 238000001514 detection method Methods 0.000 title claims abstract description 63
- 238000001179 sorption measurement Methods 0.000 claims abstract description 38
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 102000016550 Complement Factor H Human genes 0.000 description 1
- 108010053085 Complement Factor H Proteins 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Abstract
The invention discloses a pipeline leakage detection device, comprising: the detection module becomes the ring-shaped, is provided with power module along detection module circumference symmetry, and power module is last to be fixedly provided with and pulls the module, and detection module includes: the device comprises an adsorption ring, a trigger piece, an adsorption ring framework, a trigger module and a support frame; the section of the adsorption ring is of a W-shaped structure, a convex circular groove is formed in the middle of the adsorption ring, the adsorption ring framework and the triggering module are arranged in the convex circular groove, the adsorption ring framework and the triggering module are fixed on the support frame, and the triggering piece is fixed on the adsorption ring; two concave circular grooves are formed in two sides of the convex circular groove; the trigger includes: the device comprises a U-shaped bracket, a trigger wafer and a fixed foot; the trigger wafer is fixed in the middle of the U-shaped bracket, the fixing feet are adhered to the opposite surface of the concave circular groove, and the trigger modules and the trigger wafer are concentrically distributed. The invention converts the local pressure change in the pipe caused by the leakage of the pipeline into an electric signal, thereby realizing the positioning of the leakage point.
Description
Technical Field
The invention relates to the field of pipeline leakage detection, in particular to a pipeline leakage detection device.
Background
Common pipeline inspection can be divided into external and internal inspection methods, external inspection equipment such as: the disadvantage of the audiometer, the coherence meter and the like is that the error is large, the cost is high, the efficiency is low depending on the experience of related operators. The product mainly used in the internal detection method is a pipeline detection robot, and the pipeline detection robot comprises crawler type, wheel type, pipeline endoscope and the like. Where the crawler and wheel type equipment needs to empty the transport medium in the pipeline before inspection, but most pipelines, such as: the urban water pipeline is not allowed to stop running and drain, so that the robot cannot be used for detection in the occasion of continuous running of the water pipeline and the like. Although the pipeline endoscope can detect in the pipeline running state, only the leakage point with larger leakage sound in the pipeline can be detected, and the pipeline endoscope can not be suitable for detecting silent leakage and the occasion of the pipeline with larger or smaller pipe diameter when used in the pipeline with moderate pipe diameter size.
In view of the above, it is necessary to design a new type of pipe leakage detecting device to solve the above problems.
Disclosure of Invention
The invention provides a pipeline leakage detection device, which converts local pressure change in a pipeline caused by pipeline leakage into an electric signal so as to realize the positioning of a leakage point, and the device is described in detail below:
a pipe leak detection apparatus comprising: the detection module is annular, power modules are symmetrically arranged along the circumferential direction of the detection module, traction modules are fixedly arranged on the power modules,
the detection module comprises: the device comprises an adsorption ring, a trigger piece, an adsorption ring framework, a trigger module and a support frame;
the section of the adsorption ring is of a W-shaped structure, a convex circular groove is formed in the middle of the adsorption ring, the adsorption ring framework and the triggering module are arranged in the convex circular groove, the adsorption ring framework and the triggering module are fixed on the support frame, and the triggering piece is fixed on the adsorption ring; two concave circular grooves are formed in two sides of the convex circular groove;
the trigger includes: the device comprises a U-shaped bracket, a trigger wafer and a fixed foot;
the trigger wafer is fixed in the middle of the U-shaped bracket, the fixing feet are adhered to the opposite surface of the concave circular groove, and the trigger modules and the trigger wafer are concentrically distributed.
The outer edges of the two concave circular grooves are in a horn shape and are used for being attached to the inner wall of the pipeline;
the support frame is in a ring shape, and a group of framework jacking columns, framework locking screws, fixing holes of the power module and fixing holes of the trigger module which are symmetrically distributed are arranged on the support frame;
the skeleton locking screw is used for installing the adsorption ring and the adsorption ring skeleton on a skeleton jack post on the support frame.
Further, the power module includes: a propeller, a power bracket and a flexible wheel;
the propeller is fixedly arranged on the power bracket; the power bracket is provided with a fixing hole, a traction module fixing hole and two symmetrical flexible wheel brackets;
the power support is further provided with a groove, a trigger piece is arranged inside the power support, the flexible wheel support is provided with a flexible wheel, the flexible wheel is made of polyurethane, and toothed edges are arranged on the periphery of the flexible wheel.
Wherein the traction module comprises: the device comprises three brackets, a supporting main body, a compression nut, a sealing ring and a fixing seat;
the three supports are symmetrically arranged on the side face of the supporting main body, a wire passing hole is formed in the middle of the supporting main body, a compression nut and a sealing ring are arranged in the wire passing hole, and the compression nut is provided with a through hole coaxial with the wire passing hole.
Further, the adsorption ring is made of flexible materials.
The technical scheme provided by the invention has the beneficial effects that:
1. the pipeline leakage detection device can convert leakage events at the pipeline leakage points into electric signals on the detection device, and the adopted adsorption ring structure can detect loud leakage points and small leakage without sound characteristics or tiny sound by utilizing the fluid pressure in the pipeline;
2. the leakage points of the actual pipelines are generally distributed at the bell and spigot joints among the pipelines, so that some leakage points are hidden in the bell and spigot joint gaps, the leakage points cannot be effectively identified by adopting a traditional pipeline endoscope, the defect of the endoscope detection is well avoided by the pipeline leakage detection device, the regularity of bell and spigot joint distribution is added, and the equipment can be used for purposefully detecting the leak points in the pipeline, so that the efficiency of pipeline leakage detection is greatly improved;
3. the pipeline leakage detection device can be used under the condition that the pipeline normally operates, the pipeline is not required to be emptied, and the operation cost is reduced;
4. the pipeline leakage detection device can be suitable for pipelines with the pipe diameter ranging from DN100 to DN3400, and the defect that the traditional detection device is limited by the pipe diameter is overcome;
5. the pipeline leakage detection device has the advantages of simple structure, low cost, high reliability and great popularization value.
Drawings
FIG. 1 is a block diagram of a pipe leak detection apparatus;
FIG. 2 is a block diagram of a detection module;
FIG. 3 is a partial enlarged view of the detection module of FIG. 1-1;
FIG. 4 is a cross-sectional view of a detection module;
FIG. 5 is a partial enlarged view of the detection module of FIGS. 1-2 and 1-3;
FIG. 6 is a block diagram of a trigger;
FIG. 7 is a block diagram of a power module;
FIG. 8 is a schematic diagram of a power module installation;
FIG. 9 is a block diagram of a traction module;
FIG. 10 is a partial cross-sectional view of the traction module;
FIG. 11 is a schematic diagram of the operation of the pipe leak detection apparatus;
in the drawings, the list of components represented by the various numbers is as follows:
1-a detection module; 2-a power module; 3-a traction module;
10-an adsorption ring; 11-a trigger; 12-adsorbing a ring skeleton;
13-triggering a module; 14-supporting frames; 20-propeller;
21-a power rack; 22-flexible wheels; 30-a bracket;
31-a support body; 32-compressing the nut; 33-sealing rings;
34-fixing seat;
100-outer edges; 101-concave circular grooves; 102-convex circular grooves;
a 110-U-shaped bracket; 111-triggering a wafer; 112-fixing feet;
140-a framework top column; 141-a skeleton locking screw; 142-power module fixing holes;
143-a trigger module fixing hole; 210-fixing holes; 211-a traction module fixing hole;
212-a flexible wheel support; 213-grooves; 214-a screw;
215-screw; 220-toothed edges; 310-wire vias;
320-via.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below.
In order to achieve the above object, referring to fig. 1, an embodiment of the present invention provides a pipe leakage detecting apparatus, including: a detection module 1, a power module 2 and a traction module 3; the detection module 1 is annular, the power modules 2 are symmetrically distributed along the circumferential direction of the detection module 1, and the traction module 3 is fixed on the power modules 2.
The detection module 1 is mainly used for converting leakage signals into electrical signals. As shown in fig. 2 to 6, the detection module 1 includes: the adsorption ring 10, the trigger piece 11, the adsorption ring skeleton 12, the trigger module 13 and the support frame 14; referring to fig. 5, which is partially enlarged in fig. 1-2, the cross section of the adsorption ring 10 is in a W shape, a convex circular groove 102 is arranged in the middle, an adsorption ring skeleton 12 is arranged in the convex circular groove 102, two concave circular grooves 101 are arranged on two sides of the convex circular groove 102, and the outer edges 100 of the two concave circular grooves 101 are in a horn shape and are used for being attached to the inner wall of a pipeline. The supporting frame 14 is in a ring shape, and is provided with a group of framework jacking posts 140, framework locking screws 141, fixing holes 142 of the power module and fixing holes 143 of the trigger module which are symmetrically distributed, wherein each technical feature in the embodiment is six groups, and the embodiment of the invention is not limited in particular implementation; referring to fig. 5, which is an enlarged view of a portion of fig. 1-3, the suction ring 10 and the suction ring frame 12 are mounted and secured to six frame posts 140 on the support frame 14 by frame locking screws 141.
The trigger 11 includes a U-shaped bracket 110, a trigger wafer 111, and a securing leg 112 (shown in FIG. 6). The trigger wafer 111 is secured in the middle of the U-shaped bracket 110, preferably by adhesive means. The trigger wafer 111 is made of iron, and the U-shaped bracket 110 is made of nylon, ABS or the like. The fixing leg 112 of the trigger 11 is adhered to the opposite side of the recess 101 (see fig. 5 for partial enlargement of fig. 1-2) and functions to move the trigger 11 up and down when the recess 101 moves up and down. The trigger module 13 is fixedly installed in a trigger module fixing hole 143 (see fig. 1-1 and 1-2 of fig. 3 and 5) on the support frame 14, and the trigger module 13 is concentrically distributed with the trigger wafer 111.
The power module 2 mainly serves to provide the equipment operation power and the function of crawling in the pipe. As shown in fig. 7 and 8, the power module 2 includes: a propeller 20, a power bracket 21 and a flexible wheel 22; the propeller 20 is fixedly arranged on the power bracket 21 by two screws 214; the power bracket 21 is provided with a fixing hole 210, a traction module fixing hole 211 and a bilaterally symmetrical flexible wheel bracket 212; the fixing holes 210 are used to mount the power module 2 on the power module fixing holes 142, and as shown in fig. 8, are mounted and fixed with 4 screws 215. In addition, the power bracket 21 is also provided with a groove 213, and a trigger piece 11 is arranged in the groove, so that the trigger piece 11 is protected. The traction module fixing holes 211 are used for fixedly mounting the traction module 3, and the flexible wheel 22 is mounted on the flexible wheel bracket 212; the flexible wheel 22 is made of polyurethane, and is provided with toothed edges 220 on the periphery for buffering vibrations during movement.
The pipeline leakage detection device is also provided with a traction module 3 which has the functions of fixing and protecting the electrical cables of the equipment; as shown in fig. 9 and 10, the method specifically includes: three brackets 30, a supporting main body 31, a compression nut 32, a sealing ring 33 and a fixing seat 34; the three brackets 30 are symmetrically arranged on the side surface of the supporting main body 31, and the tail ends of the brackets 30 are provided with fixing seats 34 for installing the traction module 3 on the traction module fixing holes 211 on the power module 2; a wire passing hole 310 is arranged in the middle of the supporting main body 31, a compression nut 32 and a sealing ring 33 are arranged in the wire passing hole 310, and a through hole 320 is arranged on the compression nut 32 and is coaxial with the wire passing hole 310. The function of the above structure is to control the tightness of the sealing ring 33 by screwing the compression nut 32 after penetrating the cables on the detection module 1 and the power module 2 from the wire through hole 310, thereby achieving the purpose of fastening the cables (the cables are not shown in the figure).
To accommodate the pipe environment, the suction ring 10 is of annular configuration with an inwardly concave "W" shaped cross section, with the outer edge 100 being the same or slightly larger in diameter than the pipe. This arrangement ensures that the attachment of the suction ring 10 to the pipe wall, even when the entire detection device is moved forward, an effective enclosed space is formed in the pipe.
In order to increase the adsorption effect of the adsorption ring 10, the material of the adsorption ring 10 is preferably silica gel, and may be other flexible materials with similar physical properties.
For detection purposes, the trigger module 21 is a proximity sensor. The model is selected from LJ12A3-4-J/DZ. When the metal materials such as copper, iron, aluminum and the like approach the sensor for a certain distance, an electric signal (specifically within 4 mm) is emitted. In the embodiment of the invention, six groups of trigger sensing pairs are adopted, and when leakage is detected, the six groups of trigger sensing pairs send out trigger signals simultaneously. The underwater propeller 20 with an optional number OVISION can be directly controlled by a direct current power supply, and the forward and backward movement of the equipment can be realized through forward and backward rotation.
Fig. 11 shows a partial cross-sectional view of the detection device at a leak point in a pipe, the principle of operation of which is as follows:
when the detection device moves to the position of the leakage point 41 along the inner wall of the pipeline 4, the outer edge 100 of the adsorption ring 10 is attached to the pipe wall, the two concave circular grooves 101 of the adsorption ring 10 are isolated from the fluid 42 in the pipeline 4, and the fluid 42 in the grooves is communicated with the outside through the leakage point 41 and is decompressed due to the existence of the leakage point 41, so that the pressure of the fluid 42 in the grooves is smaller than the pressure of the fluid 40 in the pipe. The concave groove 101 of the adsorption ring 10 is pressed towards the inner wall surface of the pipe 4 under the pressure of the fluid 40 in the pipe, the concave groove 101 drives six trigger pieces 11 fixedly connected with the concave groove 101 to move towards the trigger module 13 in the pressing process, and when the distance between the trigger disc 111 on the trigger piece 11 and the trigger module 13 is smaller than the trigger distance (in the embodiment, the embodiment of the invention is not limited by the fact that the distance is illustrated by taking 4mm as an example), the trigger module 13 enters into a working state, and the purpose of converting leakage signals into electric signals is achieved. The detection device designed by the embodiment of the invention can flexibly adjust the parameters of the device according to the detection requirements of different leakage quantities so as to achieve the detection purpose.
The method of use of the device is further described below, in the following examples, by way of example, for detecting a leak in a pipe of diameter D, as described in detail below:
assuming that the volume of the closed space C formed between the suction ring 10 and the pipe wall of the detection device is V, the bottom width of the suction ring 10 is set to H (i.e., the axial height of the contact portion of the closed space C with the pipe wall, that is, the distance of the outer edge 103), and the trigger threshold is set to P (defined as that the trigger module 13 is triggered when the volume is reduced to P). The actual decrease in the enclosed space C through the leak during detection is denoted by Y, then the following equation is given:
wherein M is leakage amount, and the unit is ml/s; v is the forward speed of the detection device in m/s. For checking
And detecting the leakage point, wherein Y is required to be larger than or equal to a trigger threshold P, namely:
in practice, the P, V and H values of a test device are known in advance, so that they are according to the above formula (2)
The relation between the forward speed v of the detection device and the leakage amount M can be deduced:
from the above inequality (3), it is known that v and M are in a proportional relationship, i.e. the smaller the leakage M, the smaller the forward speed v of the detection device, and the corresponding scaling factor H/P depends on the parameters of the device itself.
Further, the value of P can be measured in terms of the volume V of the enclosed space C, corresponding to the triggering threshold P being a function of V,
let P differ from V by a factor such that there is:
P＝κV (4)
where κ e (0, 1), p=0.001V when κ=0.001, indicates that the trigger threshold is 0.1% of the volume of the enclosure. As an example, given the value h=0.5 m, κ=0.001, v=20000 ml, after bringing the above inequality (3):
ν≤0.025·M (5)
assuming that the minimum leakage flow required for detection is 10ml/s for the pipe of pipe diameter D, v.ltoreq.0.25 m/s is obtained by the above equation (5), that is, the advancing speed of the detection apparatus cannot exceed 0.25m/s. For tasks requiring detection of smaller leakage, the detection device may come off line at the moving speed, so that the detection requirement cannot be met by slowing down the moving speed, and this can be achieved by adjusting the device parameters, for example: smaller trigger threshold P or increasing the value of H is designed to meet various needs in practical applications.
The embodiment of the invention does not limit the types of other devices except the types of the devices, so long as the devices can complete the functions.
Those skilled in the art will appreciate that the drawings are schematic representations of only one preferred embodiment, and that the above-described embodiment numbers are merely for illustration purposes and do not represent advantages or disadvantages of the embodiments.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (2)
1. A pipe leak detection apparatus comprising: the detection module is characterized in that the detection module is annular, power modules are symmetrically arranged along the circumferential direction of the detection module, traction modules are fixedly arranged on the power modules,
the detection module comprises: the device comprises an adsorption ring, a trigger piece, an adsorption ring framework, a trigger module and a support frame;
the section of the adsorption ring is of a W-shaped structure, a convex circular groove is formed in the middle of the adsorption ring, the adsorption ring framework and the triggering module are arranged in the convex circular groove, the adsorption ring framework and the triggering module are fixed on the support frame, and the triggering piece is fixed on the adsorption ring; two concave circular grooves are formed in two sides of the convex circular groove;
the trigger includes: the device comprises a U-shaped bracket, a trigger wafer and a fixed foot;
the trigger wafer is fixed in the middle of the U-shaped bracket, the fixing feet are adhered to the opposite surface of the concave circular groove, the trigger module is fixedly arranged in a trigger module fixing hole on the supporting frame, and the trigger modules and the trigger wafer are concentrically distributed;
the outer edges of the two concave circular grooves are in a horn shape and are used for being attached to the inner wall of the pipeline;
the support frame is in a ring shape, and a group of framework jacking columns, framework locking screws, fixing holes of the power module and fixing holes of the trigger module which are symmetrically distributed are arranged on the support frame;
the skeleton locking screw is used for installing the adsorption ring and the adsorption ring skeleton on a skeleton jack post on the support frame;
the power module includes: a propeller, a power bracket and a flexible wheel;
the propeller is fixedly arranged on the power bracket; the power bracket is provided with a fixing hole, a traction module fixing hole and two symmetrical flexible wheel brackets; the fixing holes are used for installing the power module on the power module fixing holes;
the power support is also provided with a groove, a trigger piece is arranged in the power support, the flexible wheel support is provided with a flexible wheel, the flexible wheel is made of polyurethane, and the periphery of the flexible wheel is provided with a toothed edge;
the traction module includes: the device comprises three brackets, a supporting main body, a compression nut, a sealing ring and a fixing seat;
the three brackets are symmetrically arranged on the side surface of the supporting main body, a wire passing hole is formed in the middle of the supporting main body, a compression nut and a sealing ring are arranged in the wire passing hole, and the compression nut is provided with a through hole which is coaxial with the wire passing hole;
the concave groove of the absorption ring is extruded towards the inner wall surface direction of the pipeline under the pressure action of fluid in the pipe, six trigger pieces fixedly connected on the concave groove are driven to move towards the trigger module in the extrusion process, the six trigger pieces simultaneously send out trigger signals, and when the distance between a trigger wafer on the trigger piece and the trigger module is smaller than the trigger distance, the trigger module enters a working state.
2. A pipe leak detection apparatus as defined in claim 1, wherein the suction ring is of a flexible material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111579853.1A CN114278879B (en) | 2021-12-22 | 2021-12-22 | Pipeline leakage detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111579853.1A CN114278879B (en) | 2021-12-22 | 2021-12-22 | Pipeline leakage detection device |
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| CN114278879A CN114278879A (en) | 2022-04-05 |
| CN114278879B true CN114278879B (en) | 2023-11-14 |
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| CN117771404B (en) * | 2024-02-28 | 2024-04-26 | 山东格贝森医疗科技有限公司 | Endoscope self-cleaning disinfection and leakage detection device |
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| KR20160045244A (en) * | 2014-10-17 | 2016-04-27 | 정광목 | Robot for cleaning dust in pipe |
| DE102016106253B3 (en) * | 2016-04-06 | 2017-06-01 | Konrad Farys | Ventilation pipe cleaner |
| CN209470037U (en) * | 2019-01-25 | 2019-10-08 | 克拉玛依四维石油科技有限公司 | Oil-gas gathering and transportation oil-piping anti-leak detection device with fluid self-powered function |
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