CN217542961U

CN217542961U - Convenient device for electrical leakage detection of geomembrane

Info

Publication number: CN217542961U
Application number: CN202123311973.1U
Authority: CN
Inventors: 邓彬; 叶阳; 阳波; 王传铭; 赖钰薪
Original assignee: Wuhan University WHU; Sinohydro Bureau 7 Co Ltd
Current assignee: Wuhan University WHU; Sinohydro Bureau 7 Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-10-04
Anticipated expiration: 2031-12-27

Abstract

The utility model belongs to the technical field of geomembrane defect detection, a convenient device of geomembrane electricity seepage detection based on bipolar process is disclosed, including portable host computer and cart based detection stick, both link to each other by connecting cable. The cart-type detection rod consists of an insulating handle, a detection vertical rod and a detection transverse rod. The detection vertical rod is extended or shortened through the telescopic fixing device and is connected with the detection transverse rod through the rotary joint, so that the detection vertical rod rotates around the detection transverse rod, and the use angle is adjusted. The detection cross rod is provided with a detection electrode and an insulating wheel, the detection electrode is compressed when extruding the ground, the contact is stable, and the distance between the detection electrode and the insulating wheel is adjustable. The detection electrode transmits the collected electric signals to the data analysis processor, and the GPS positioning system can draw a potential distribution diagram on the liquid crystal display screen under the synergistic effect to automatically position potential distribution abnormal points. The utility model has the advantages of time saving and labor saving, stable and interval adjustable contact between the detection electrode and the ground, strong site adaptability, portable host computer, etc.

Description

Convenient device for electrical leakage detection of geomembrane

Technical Field

The utility model belongs to the technical field of geomembrane defect detection, concretely relates to convenient device of geomembrane electricity seepage detection based on bipolar method.

Background

The geomembrane is a novel anti-seepage material taking high molecular polymer as a basic raw material, has the advantages of strong deformability, good anti-seepage performance, low economic cost and the like, and is widely applied to anti-seepage projects such as earth and rockfill dams, dykes, cofferdams, reservoir trays, reservoirs, channels, refuse landfills and the like. After the completion of the laying of the geomembrane, generally, soil and stone materials such as sand or sand gravel are covered above the membrane to be used as a protective layer on the membrane. In the laying and compacting stage of the protective layer, the covering material easily punctures the geomembrane due to the rolling compaction of heavy machinery, so that the geomembrane is damaged and has defects. If the geomembrane is not treated in time after the geomembrane has defects, the downward seepage liquid can form concentrated seepage at the defects, so that the safety of the whole project is damaged. Since the geomembrane is covered by the protective layer, the defects are difficult to be directly observed and found by naked eyes, and the detection of the geomembrane defects is usually carried out by an electrical detection method.

The double-electrode method mainly comprises the steps of applying an electric field on the geomembrane, moving a detection device for detection, and positioning defect holes according to the distribution rule of the electric potential in the protective layer. During detection, a power supply electrode is respectively arranged in the upper cushion layer and the lower cushion layer of the geomembrane and is connected with the anode and the cathode of a high-voltage direct-current power supply. In general, when the geomembrane is intact, a loop cannot be formed between the power supply electrodes; when the geomembrane has a leak, the defect provides a passage, current is generated in a loop, the defect is equivalent to a current source, and the potential near the defect is obviously abnormal, so that the leak can be positioned by detecting the abnormality of the potential field on the geomembrane by a movable detection device.

According to research, most of common geomembrane leakage detectors adopting a double-electrode method in the market are composed of a bracket formed by simply combining transverse rods and vertical rods and a pair of detection electrodes with fixed intervals, and a main machine of the detector is basically portable. In the detection process, the handheld detection equipment is bent to advance, the length and the angle of the vertical rod cannot be adjusted, physical strength is extremely consumed, and operation is inconvenient. When the detection range is increased, the detection time is greatly increased because the distance between the detection electrodes is fixed. When the detecting device is pushed forwards, the staff unconsciously presses the detecting rod, so that the transverse rod of the detecting rod bends downwards, the distance between the detecting electrodes is increased, and a detection error is generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laborsaving place strong adaptability's geomembrane electricity seepage detects convenient device based on bipolar process to solve the not enough of prior art that provide in the technical background.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a convenient device for detecting electrical leakage of a geomembrane comprises a cart type detection rod and a portable host, wherein the cart type detection rod is connected with the portable host through a connecting cable; the cart based detection rod comprises an insulating handle, a detection vertical rod and a detection transverse rod, wherein the insulating handle and the detection transverse rod are fixed at two ends of the detection vertical rod.

Furthermore, the vertical detection rod comprises an upper rod and a lower rod, and the lower rod is nested outside the upper rod and is connected by a telescopic fixing device; the detection vertical rods are connected with the detection transverse rods through rotary joints.

Furthermore, the telescopic fixing device comprises a plurality of first positioning round holes and fixing bolts; the first positioning round holes are uniformly arranged along the length direction of the upper rod; the lower rod is provided with a bolt hole corresponding to the fixing bolt, and the fixing bolt sequentially penetrates through the bolt hole and different first positioning round holes to achieve telescopic adjustment of the upper rod and the lower rod.

Furthermore, the rotary joint comprises a connecting support, a rotary shaft, a fixing nut and a fixing screw; the lower rod is arranged in the connecting support, the rotating shaft is fixedly connected with the lower rod, and an arc-shaped long groove is formed in the outer circumference of the connecting support; the two ends of the rotating shaft are slidably mounted in the arc-shaped long groove of the connecting support, the two ends of the rotating shaft extending out of the arc-shaped long groove are in threaded connection with fixing nuts, and the fixing nuts are locked on the connecting support through fixing screws.

Furthermore, a power supply socket is arranged at the top of the upper rod and is connected with the portable host through a connecting plug.

Furthermore, the insulating handle is symmetrical about the detection vertical rod, and insulating rubber is sleeved on the insulating handle.

Furthermore, the detection transverse rods are symmetrical relative to the detection vertical rods and comprise thick rods, thin rods, insulating wheels and detection electrodes; the electrode spring arranged in the detection electrode is connected with the thin rod; the insulating wheels are arranged at two ends of the thin rod and fixed through bolts.

Furthermore, a plurality of second positioning round holes which are uniformly and respectively arranged are respectively arranged at two ends of the thick rod; the inner of thin pole is equipped with fixed button, and fixed button embeds there is fixed spring, fixed button realizes through popping out from different second location round holes thin pole for thick pole telescopic adjustment.

Furthermore, the portable host comprises a connecting cable, a liquid crystal display screen, a setting button, a buzzer, an indicator light, a hanging belt, a power supply system, a GPS positioning system and a data analysis processor; the connecting cable is connected with the detection electrode), the detection cross rod, the detection vertical rod, the power supply socket and the portable host in sequence.

Compared with the prior art, the beneficial effects of the utility model are that:

this stick is surveyed to cart based of convenient device of geomembrane electricity seepage detection can be according to the different height-adjusting of people's height, can adjust the angle of montant according to the difference in place like level land and side slope, and the staff holds insulated handle, and impels forward, surveys the stick and replaces the slip with the roll, labour saving and time saving, and is extremely convenient. Because the detection rod is pushed to advance without being pressed downwards with force, the detection cross rod cannot be pressed and bent, and the stability of the distance between the detection electrodes can be effectively kept. During detection, the detection electrode is in extrusion contact with the ground, and the contact stability can be kept. When the detection field is large, the distance between the detection electrodes can be adjusted, the distance can be increased by half to the maximum extent, and the detection time is shortened. In the region with uneven ground, the contact between the detection electrode and the geomembrane protective layer can be influenced by the existence of the insulating wheel, and the insulating wheel can be detached after the device is powered off to continue detection. The portable host is small in size, can be hung on the body, and is convenient to carry. To sum up, the utility model has the advantages of labour saving and time saving, detecting electrode and ground contact are stable and the interval is adjustable, place strong adaptability, host computer portable.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the cart-type detecting rod of the present invention;

fig. 3 is a schematic structural view of the telescopic fixing device of the present invention;

FIG. 4 is a schematic view of the structure of the rotary joint of the present invention;

FIG. 5 is a schematic structural view of the detection electrode spacing adjustment of the present invention;

fig. 6 is a schematic view of the installation of the detecting electrode and the electrode spring of the present invention;

fig. 7 is a working condition diagram for detecting defects of geomembrane by a double-electrode method of the utility model;

fig. 8 is a schematic structural diagram of the portable host of the present invention.

In the figure: 100. a cart-based probe bar; 110. an insulated handle; 120. a vertical detection rod 121 and an upper rod; 122. a lower rod; 123. a power supply socket; 130. detecting a cross bar; 131. a thick rod; 132. a thin rod; 133. an insulating wheel; 134. a detection electrode; 135. a second positioning round hole; 136. a fixed button; 137. fixing the spring; 138. an electrode spring; 140. a telescopic fixing device; 141. a first positioning round hole; 142. fixing the bolt; 150. a rotary joint; 151. connecting a support; 152. a rotating shaft; 153. fixing a nut; 154. fixing screws; 200. a portable host; 210. connecting a cable; 211. a connecting plug; 220. a liquid crystal display screen; 230. setting a button; 240. buzzer a machine; 250. an indicator light; 260. hanging a belt; 310. a geomembrane; 320. an upper cushion layer; 330. a lower cushion layer; 340. a power supply positive electrode; 350. a power supply cathode; 360. high voltage direct current power supply.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, a convenient geomembrane electrical leakage detection device based on a two-electrode method is formed by connecting a cart-type detection rod 100 and a portable host 200 through a connecting cable 210. The cart-type detection rod 100 comprises an insulating handle 110, a detection vertical rod 120 and a detection cross rod 130, wherein a power supply socket 123 is arranged at the top of the detection vertical rod 120 and is connected with the portable host 200 through a connecting plug 211. The portable host 200 includes a connection cable 210, a liquid crystal display 220, a setting button 230, a buzzer 240, an indicator lamp 250, a hanging strip 260, a power supply system 270, a GPS positioning system 280, and a data analysis processor 290.

As shown in fig. 1, 2 and 3, the vertical detecting rod 120 includes an upper rod 121 and a lower rod 122, and the lower rod 122 is nested outside the upper rod 121 and connected by a telescopic fixing device 140. When the height of the detecting vertical rod 120 is adjusted, the fixing bolt 142 is unscrewed, the upper rod 121 is pulled up or pressed down, after the height is adjusted to a proper value, the first positioning circular hole 141 is aligned with the fixing bolt 142, the fixing bolt 142 is screwed, and the fixing bolt 142 is inserted into the first positioning circular hole 141, so that the telescopic purpose can be achieved. In this embodiment, the number of the first positioning circular holes 141 is 5, and the distance between each first positioning circular hole 141 is 10cm, which can adjust a height difference of 40cm. Meanwhile, the number and the interval of the first positioning circular holes 141 may be changed according to a use scene.

As shown in fig. 1 and 4, the vertical detecting rod 120 and the horizontal detecting rod 130 are connected by a rotary joint 150. The rotary joint 150 includes a coupling holder 151, a rotary shaft 152, a fixing nut 153, and a fixing screw 154. The lower rod 122 is arranged in the connecting support 151, the rotating shaft 152 is fixedly connected with the lower rod 122, and an arc-shaped long groove is formed in the outer circumference of the connecting support 151; two ends of the rotating shaft 152 are slidably mounted in the arc-shaped long groove of the connecting support 151, two ends of the rotating shaft 152 extending out of the arc-shaped long groove are in threaded connection with fixing nuts 153, and the fixing nuts 153 are locked on the connecting support 151 through fixing screws 154. When the angle of the detecting vertical rod 120 is adjusted, the fixing screw 154 is removed, the fixing nuts 153 at the two ends are loosened, and the rotating shaft 152 is not fixed and can rotate freely. After the detecting vertical rod 120 is adjusted to a proper angle, the fixing nut 153 is screwed, and the fixing screw 154 is screwed, so that the angle adjustment is completed.

As shown in fig. 1, 5 and 6, the detection beam 130 includes a thick rod 131, a thin rod 132, an insulating wheel 133, and a detection electrode 134. The electrode spring 138 arranged in the detection electrode 134 is connected with the thin rod 132; the electrode spring 138 is in a slightly compressed state in an initial state, fixes the electrode tip of the detection electrode 134, and is in pressing contact with the ground during detection, so that the electrode spring 138 is compressed, and stable contact is ensured. The insulating wheels 133 are arranged at two ends of the thin rod 132 and fixed through bolts, when the field is uneven, the detection electrode 134 may be suspended and cannot touch the ground, and the detachable insulating wheels 133 continue to detect.

A plurality of second positioning round holes 135 are uniformly and respectively arranged at two ends of the thick rod 131; the inner end of the thin rod 132 is provided with a fixing button 136, a fixing spring 137 is arranged in the fixing button 136, and the fixing button 136 is popped out from different second positioning round holes 135 to realize the telescopic adjustment of the thin rod 132 relative to the thick rod 131. The thick rod 132 has an outer diameter similar to the inner diameter of the thin rod 131 and is fixed by a fixing button 136. A retaining spring 137 is provided within the retaining button 136 and is initially slightly compressed to allow the retaining button 136 to tightly grip the rods. When the detection place is great, can press fixed button 136 after the outage, make fixed button 136 retract from second location round hole 135, when tensile slender pole 132 arrives suitable position, keep fixed button 136 and second location round hole 135 to align, can fix to play the purpose of adjusting detection electrode 134 interval. In this embodiment, two ends of the thick rod 131 are respectively provided with 5 positioning circular holes, the distance between the centers of the circles is 5cm, and the distance between the detection electrodes can be adjusted to 40cm. Meanwhile, the number and the spacing of the second positioning circular holes 135 can be changed according to the use scenario.

As shown in fig. 7, when the utility model is used to detect geomembrane defects, at first, a power supply anode 340 is required to be placed in the upper cushion layer 320 of the geomembrane 310, and a power supply cathode 350 is placed in the lower cushion layer 330, and is connected to the anode and cathode of the high voltage direct current power supply 360. When the geomembrane 310 is intact, no loop can be formed between the power supply electrodes; when a leak exists in the geomembrane 310, the defect provides a path, current is generated in a loop, the defect is equivalent to a current source, and the potential near the defect is obviously abnormal, so that the leak can be positioned by detecting the abnormality of the potential field on the geomembrane by moving the cart-type detection rod 100.

As shown in fig. 8, when the worker pushes the cart-type detection bar 100 to detect the geomembrane defect, the detection electrode 134 transmits the collected electrical signal to the data analysis processor 290, and the gps positioning system 280 cooperates with each other, so that a potential distribution diagram can be drawn on the liquid crystal display 220, an abnormal potential distribution point can be automatically positioned, the geomembrane defect position can be obtained through analysis and judgment, the buzzer 240 gives an alarm, the indicator lamp 250 is turned on, and the result is stored in the background and then can be called out uniformly. After the distance between the detecting electrodes 134 is adjusted, the portable host 200 needs to adjust to the corresponding gear to work. The portable host 200 has a small volume, and the worker can hang the hanging belt 260 on the body, so that the portable host is convenient to carry.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. The utility model provides a convenient device of geomembrane electricity seepage inspection which characterized in that: the system comprises a cart type detection rod (100) and a portable host (200), wherein the cart type detection rod (100) is connected with the portable host (200) through a connecting cable (210); the cart-type detection rod (100) comprises an insulating handle (110), a detection vertical rod (120) and a detection transverse rod (130), wherein the insulating handle (110) and the detection transverse rod (130) are fixed at two ends of the detection vertical rod (120).

2. The geomembrane electrical leakage detection convenient device according to claim 1, wherein: the detection vertical rod (120) comprises an upper rod (121) and a lower rod (122), wherein the lower rod (122) is nested outside the upper rod (121) and is connected by a telescopic fixing device (140); the detection vertical rod (120) is connected with the detection transverse rod (130) through a rotary joint (150).

3. The convenient and fast geotechnical membrane electrical leakage detection device according to claim 2, wherein: the telescopic fixing device (140) comprises a plurality of first positioning round holes (141) and fixing bolts (142); the first positioning round holes (141) are uniformly arranged along the length direction of the upper rod (121); the telescopic adjusting device is characterized in that bolt holes corresponding to fixing bolts (142) are formed in the lower rod (122), and the fixing bolts (142) sequentially penetrate through the bolt holes and different first positioning round holes (141) to achieve telescopic adjustment of the upper rod (121) and the lower rod (122).

4. The convenient and fast geotechnical membrane electrical leakage detection device according to claim 2, wherein: the rotary joint (150) comprises a connecting support (151), a rotary shaft (152), a fixing nut (153) and a fixing screw (154); the lower rod (122) is arranged in the connecting support (151), the rotating shaft (152) is fixedly connected with the lower rod (122), and an arc-shaped long groove is formed in the outer circumference of the connecting support (151); the two ends of the rotating shaft (152) are slidably mounted in arc-shaped long grooves of the connecting support (151), the two ends of the rotating shaft (152) extending out of the arc-shaped long grooves are in threaded connection with fixing nuts (153), and the fixing nuts (153) are locked on the connecting support (151) through fixing screws (154).

5. The convenient and fast geotechnical membrane electrical leakage detection device according to claim 2, wherein: the top of the upper rod (121) is provided with a power supply socket (123) which is connected with the portable host (200) through a connecting plug (211).

6. The convenient and fast geotechnical membrane electrical leakage detection device according to claim 1, wherein: the insulating handle (110) is symmetrical about the detection vertical rod (120), and insulating rubber is sleeved on the insulating handle.

7. The geomembrane electrical leakage detection convenient device according to claim 1, wherein: the detection cross rod (130) is symmetrical relative to the detection vertical rod (120) and comprises a thick rod (131), a thin rod (132), an insulating wheel (133) and a detection electrode (134); an electrode spring (138) arranged in the detection electrode (134) is connected with the thin rod (132); the insulation wheels (133) are arranged at two ends of the thin rod (132) and fixed through bolts.

8. The geomembrane electrical leakage detection convenient device according to claim 7, wherein: a plurality of second positioning round holes (135) which are uniformly and respectively arranged are respectively arranged at two ends of the thick rod (131); thin pole (132) inner is equipped with fixed button (136), and fixed button (136) embeds has fixed spring (137), fixed button (136) are through popping out the realization in following different second location round holes (135) thin pole (132) for thick pole (131) flexible regulation.

9. The convenient and fast geotechnical membrane electrical leakage detection device according to claim 1, wherein: the portable host (200) comprises a connecting cable (210), a liquid crystal display screen (220), a setting button (230), a buzzer (240), an indicator light (250), a hanging belt (260), a power supply system (270), a GPS (global positioning system) positioning system (280) and a data analysis processor (290); the connecting cable (210) is sequentially connected with the detection electrode (134), the detection cross rod (130), the detection vertical rod (120), the power supply socket (123) and the portable host (200).