CN113324703B - Online monitoring method for water inlet and moisture of cable joint - Google Patents
Online monitoring method for water inlet and moisture of cable joint Download PDFInfo
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- CN113324703B CN113324703B CN202110620352.7A CN202110620352A CN113324703B CN 113324703 B CN113324703 B CN 113324703B CN 202110620352 A CN202110620352 A CN 202110620352A CN 113324703 B CN113324703 B CN 113324703B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Abstract
The invention discloses an online monitoring method for the water inlet and damp of a cable joint, which comprises a detecting head and a main body, wherein the detecting head is connected with the main body through a conducting wire; the detecting head includes second lid, second casing, hydrogen sensor and adapter, the second lid bonds with the second casing, the hydrogen sensor is located the second casing, the adapter includes probe, connecting cylinder and coupling nut, the connecting cylinder is connected with the probe, coupling nut can be connected connecting cylinder and second casing. The invention can be used for quickly detecting whether the cable joint is affected with damp or not, and can find the defect that the cable joint is affected with damp in advance.
Description
Technical Field
The invention relates to the technical field of cable detection, in particular to an online monitoring method for water inlet and moisture of a cable joint.
Background
The cable is an electric energy or signal transmission device, usually comprises several or several groups of wires, and with the continuous expansion of modern urban functions, the cable is largely used in urban distribution networks. Because the insulation of the crosslinked polyethylene cable is the whole formed by extrusion molding, the cable is favored by users with waterproof and moisture-proof performance at the beginning of the investment, the vigorous popularization and large-scale replacement of the original line are obtained, people often neglect the moisture intrusion prevention work on the cable, but the mechanical damage generated in the processes of transportation, laying and installation and the failure of the process per se to be perfect are avoided, the existence of defects (such as impurities, cracks and the like) in the cable is inevitable, the cable per se runs in an underground humid environment for a long time, the crosslinked polyethylene cable and an intermediate joint are gradually affected with moisture intrusion along with the extension of the operation time, after moisture erosion, a series of physicochemical corrosion reactions are generated inside the joint under the action of a strong electric field, the original structure of the joint is damaged, the breakdown accident of the cable joint is caused, and the potential safety hazard of an electric power system is caused, but in the conventional routing inspection, the countermeasure for the problem is still lacked.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an on-line monitoring method for the water inlet and the moisture of a cable joint, which can be used for quickly detecting whether the cable joint is wetted by water inlet or not and can find the defect that the cable joint is wetted in advance.
The invention is realized by the following technical scheme:
an online monitoring method for the water inlet and moisture of a cable joint comprises the following steps:
the method comprises the following steps:
1) A monitoring hole is formed at the tail end of the copper sleeve of the circuit connector;
2) Extending the probe into the monitoring hole;
3) Sealing the monitoring hole by adopting aluminum powder glue, and fixing the probe in the monitoring hole;
4) When the cable is damped, hydrogen generated is transferred to the hydrogen sensor, and the hydrogen reacts with silicon materials on the hydrogen sensor, so that whether the cable is damped or not is detected;
further, the step 1) is specifically as follows: stripping off a semi-conducting layer of the outer sheath of the cable at the tail end of a copper sheath of a cable joint, the size of the semiconductor layer stripped was 80 x 80mm, then cutting the cable outer sheath at the middle part of the stripped cable outer sheath semi-conducting layer to form a 30 x 30mm window, and finally drilling a hole with the diameter of 3.5mm on the wave crest of the corrugated aluminum sheath, wherein the depth of the hole is not more than 3mm;
the step 3) further comprises the following steps: the cable is sealed by adopting an insulating tape, a waterproof tape, a semi-conductive tape and a PVC tape in sequence to restore the original shape.
The detection head is connected with the main body through a wire, the main body comprises a first cover body, a first shell, a PCB and a battery, the first cover body is detachably connected with the first shell, and the PCB and the battery are both positioned in the first shell; the detecting head includes second lid, second casing, hydrogen sensor and adapter, and PCB board and battery all are connected with the hydrogen sensor, the second lid bonds with the second casing, the hydrogen sensor is located the second casing, the adapter includes probe, connecting cylinder and coupling nut, connecting cylinder and probe connection, coupling nut can be connected the connecting cylinder with the second casing.
Aiming at the problems that in the actual use of a cable in the prior art, when water enters a cable joint and is affected by tide, the electrochemical corrosion of a corrugated aluminum sheath can be caused, so that the local high resistance is generated between an insulating shield and the aluminum sheath, and finally, the local discharge breakdown is generated, the normal use of the cable is affected, and the potential safety hazard of a power system is caused, in order to facilitate an inspector to quickly find whether the cable enters water and is affected by tide in the routing inspection process, experiments show that when the cable joint enters water and is affected by tide, the electrochemical corrosion of the cable can generate hydrogen and water, the judgment of the dissection result of the existing fault cable joint is also verified, but because the shipped cable cannot be dissected and analyzed, the defect is difficult to find in advance, therefore, the inventor designs the technical scheme, when the technical scheme is used, a hole is formed in the position of a copper shell of the cable joint or a nearby aluminum sheath, a probe on the probe is inserted into the hole, the probe is made of an insulating material, and a through hole is arranged on the probe, when the cable enters a second shell through hole, the hydrogen and the probe can be quickly detected by utilizing the hydrogen and whether the hydrogen enters a second cable body and can be detected; simultaneously this technical scheme still sets up the coupling nut who is used for being connected probe and second casing for the convenience is to the change of probe on the second casing.
Further, the bottom of second casing is equipped with the arch that matches with coupling nut, is equipped with the through-hole that matches with the connecting cylinder in the arch, and the through-hole communicates external and hydrogen sensor, the connecting cylinder is located the through-hole, be equipped with the bulge loop on the circumference outer wall of connecting cylinder, coupling nut has the shoulder hole, and coupling nut and the protruding threaded connection of second casing to the bulge loop of connecting cylinder is fixed in the arch. The probe also comprises a sealing ring which is sleeved on the connecting cylinder and is positioned between the connecting cylinder and the bulge.
In order to realize the quick connection between the probe and the second shell, a downward-protruding bulge is arranged at the bottom of the second shell, a circle of convex ring is arranged on the circumferential outer wall of the connecting cylinder, the outer diameter of the convex ring is consistent with the minimum inner diameter of a stepped hole of the connecting nut, the connecting cylinder connected with the probe is inserted into the bottom of the bulge during installation, the connecting nut is screwed, and the convex ring on the connecting cylinder is fixed under the bulge by the connecting nut, so that the quick installation of the probe is completed, and the probe is convenient to replace; meanwhile, in order to ensure the air tightness between the connecting cylinder and the bulges, a sealing ring is arranged on the connecting cylinder, so that the tightness between the connecting cylinder and the bulges is ensured.
Further, still be equipped with fixed plate and a plurality of fixed column in the second casing, the fixed column evenly distributes on the inner bottom of second casing, the fixed plate is located the top of hydrogen sensor to the electrode on the hydrogen sensor runs through the fixed plate, be equipped with the connecting screw that quantity is the same with fixed column quantity on the fixed plate, connecting screw runs through the fixed plate and is connected with the fixed column.
In order to guarantee that the hydrogen sensor can stably fix in the second casing, the event has still set up the fixed plate in the second casing for electrode on the hydrogen sensor is connected with it, then places the top at each fixed column with the fixed plate, then utilizes connecting screw to fix fixed plate and fixed column fixed connection on the fixed column, thereby stably fixes the hydrogen sensor in the second casing.
Further, the outer diameter of the fixing column is sequentially increased towards the inner bottom direction of the second shell, a reinforcing rib is further arranged on the side wall of the fixing column, and the reinforcing rib is connected with the inner wall of the second shell.
Simultaneously for the use intensity that improves the fixed column, the event is placed the external diameter of fixed column along the inner bottom and is progressively increased progressively, and what be the fixed column is conical structure promptly, has effectively avoided the fixed column to take place the fracture, for the intensity of further improvement fixed column, has still set up the strengthening rib that is being connected with second shells inner wall on the outer wall of fixed column.
Furthermore, two parallel limiting plates are further arranged on the inner bottom of the first shell, grooves matched with the PCB are formed in the tops of the limiting plates, and the PCB is located in the grooves; the inner bottom of the first shell is also provided with two supporting plates, the top of each supporting plate is provided with an arc-shaped groove matched with a battery, and the battery is positioned on the arc-shaped groove; still be equipped with two grip blocks on the inner bottom of first casing, two grip blocks are located the twice of battery respectively, can fix the battery on the arc wall of backup pad.
In order to ensure that the arranged PCB can be quickly installed in the first shell, two limiting plates are arranged in the first shell, the distance between the limiting plates is smaller than the length of the PCB, meanwhile, a groove matched with the PCB is formed in the top of each limiting plate, and the PCB is clamped into the groove of each limiting plate during installation, so that the PCB can be quickly installed in the first shell; simultaneously in also installing fast the battery and the first casing in order to make things convenient for, the event still is provided with in the first casing and is used for carrying out spacing backup pad to the battery, during the installation, keeps flat the battery on the arc wall of backup pad to utilize the stable fixed of the upper bottom grip block realization of first casing to the battery.
Further, the both ends of wire all are equipped with first connector, all be equipped with the second connector on the lateral wall of first casing and second casing, first connector and second connector detachable connection. The second connector comprises a fixed cylinder, a fixed nut, a retainer ring, a gasket and a plurality of elastic sheets, the fixed cylinder is respectively inserted into the first shell and the second shell, and the retainer ring is positioned on the outer wall of the periphery of the fixed cylinder and is respectively positioned on the outer sides of the first shell and the second shell; the fixing nut is connected with the fixing cylinder through threads, the fixing nut is positioned in the first shell and the second shell, and the check ring is positioned between the check ring and the fixing nut and is respectively positioned on the outer sides of the first shell and the second shell; the shell fragment is the ring array and distributes on the terminal surface of a fixed section of thick bamboo, the wire stretches into to a fixed section of thick bamboo in through the shell fragment, first connector passes through the screw thread and is connected with a fixed section of thick bamboo to first connector can oppress the shell fragment and carry out the centre gripping to the wire.
In order to realize the quick connection between the two ends of the wire and the detecting head and the main body, holes are formed in the side walls of the first shell and the second shell, when the device is used, one end of the fixing cylinder extends into the first shell and the second shell through the holes, then the fixing nut is installed at the inner end of the fixing cylinder located in the first shell and the second shell, the fixing nut is screwed, the fixing nut is matched with a check ring on the fixing cylinder, the fixing cylinder can be stably fixed on the first shell and the second shell, then the wire extends into the fixing cylinder with the spring piece end, the first connecting head is rotated, and the first connecting head is of a conical structure, so that the first connecting head can press the spring piece to clamp the wire in the rotating process, and the quick connection between the wire and the detecting head and the main body is realized.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. when the cable joint is subjected to damp detection, the probe arranged on the detection head is inserted into the cable, hydrogen generated when the cable is damped enters the detection head through the probe, and whether hydrogen is generated is detected through the hydrogen sensor, so that whether hydrogen is generated can be quickly detected, and a patrol inspector can conveniently and quickly patrol whether the cable is damped;
2. the wire arranged in the invention can be quickly connected with the main body and the probe head, the outdoor carrying is convenient, and meanwhile, the arranged probe can be quickly installed and replaced, so that the use convenience is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention in use;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of a probe head according to the present invention;
FIG. 4 is a schematic structural diagram of a second housing according to the present invention;
FIG. 5 is a schematic view of the internal structure of the probe head of the present invention;
FIG. 6 is a schematic structural view of the main body of the present invention;
FIG. 7 is a schematic structural diagram of a first housing according to the present invention;
FIG. 8 is a schematic view of a lead according to the present invention;
FIG. 9 is a schematic view of a connection structure of a conductive wire and a first connector according to the present invention;
fig. 10 is a schematic structural diagram of the cable detection of the present invention.
Reference numbers and corresponding part names in the drawings:
1-detecting head, 2-main body, 3-cable, 4-first cover body, 5-first shell body, 6-first connecting head, 7-conducting wire, 8-second cover body, 9-second shell body, 10-adapter, 11-battery, 12-PCB board, 13-connecting screw, 14-fixing board, 15-second connecting head, 16-through hole, 17-fixing column, 18-reinforcing rib, 19-probe, 20-connecting nut, 21-connecting cylinder, 22-sealing ring, 23-hydrogen sensor, 24-clamping plate, 25-limiting plate, 26-supporting plate, 27-fixing nut, 28-gasket, 29-fixing cylinder, 30-elastic sheet and 31-retaining ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1 to 10, the present invention includes the steps of:
1) Connecting the probe head 1 and the main body 2 through a lead 7;
2) Stripping a semi-conducting layer of a cable outer sheath at the tail end of a copper sleeve of a cable joint, wherein the size of the stripped semi-conducting layer is 80 x 80mm;
3) Cutting the cable outer sheath at the middle part of the stripped cable outer sheath semi-conducting layer to form a 30 x 30mm window;
4) Drilling a hole with the diameter of 3.5mm on the wave crest of the corrugated aluminum sheath, wherein the depth of the hole is not more than 3mm;
5) The probe 19 of the probe head 1 is inserted into the opening;
6) The hole is sealed by aluminum powder glue, and the detecting head 1 is fixed on the cable, so that real-time online monitoring is realized;
7) The cable is sealed by adopting an insulating tape, a waterproof tape, a semi-conducting tape and a PVC tape in sequence to restore the cable to the original state;
8) When the cable is affected with damp, the generated hydrogen enters the second shell 9 of the probe head 1 through the probe 19, and the hydrogen reacts with the silicon material on the hydrogen sensor 23 to cause resistance and voltage changes, so that whether the hydrogen is generated or not is detected, and whether the cable is affected with damp or not is detected;
the probe comprises a probe head 1 and a main body 2, wherein the probe head 1 is connected with the main body 2 through a wire 7, the main body 2 comprises a first cover body 4, a first shell body 5, a PCB 12 and a battery 11, the first cover body 4 is detachably connected with the first shell body 5, and the PCB 12 and the battery 11 are both positioned in the first shell body 5; the probe head 1 comprises a second cover body 8, a second shell body 9, a hydrogen sensor 23 and an adapter 10, the second cover body 8 is bonded with the second shell body 9, the hydrogen sensor 23 is located in the second shell body 9, the adapter 10 comprises a probe 19, a connecting cylinder 21 and a connecting nut 20, the connecting cylinder 21 is connected with the probe 19, and the connecting nut 20 can connect the connecting cylinder 21 with the second shell body 9.
The hydrogen sensor 23 consists of a hydrogen device and a control device, wherein the hydrogen device consists of a hydrogen collector and a voltage amplifier, the hydrogen collector acquires a lower output voltage signal by default and needs an amplifier for amplification, and then the output voltage signal is identified by the control device; the control device consists of a voltage collector, a controller and a network module, wherein a battery 11 is connected with the controller of the control device and supplies power to the control device, the network module consists of an NB-Lot module and a Lora module, the system automatically switches networks, all service control logics of the controller are dormant, awakened, networked, measured, collected and uploaded, and the voltage collector is simultaneously responsible for supplying power to the hydrogen device and collecting the hydrogen voltage; PCB board 12, hydrogen sensor 23 are prior art, can purchase the gained on the market, and hydrogen sensor 23 is connected with PCB board 12 electricity through many leads, and the during operation, hydrogen collector convert the content of hydrogen in with the environment into the signal of telecommunication to transmit to the PCB board through hydrogen sensor 23, realized the detection to hydrogen, above-mentioned detection principle is prior art.
The technical scheme is that in order to facilitate inspection personnel to quickly find whether a cable is wetted when water enters the cable, the inventor tests show that when the cable connector is wetted when water enters the cable connector, hydrogen and water are generated in the process of electrochemical corrosion of the cable, and the judgment is also verified for the dissection result of the existing faulty cable connector, but the defect is difficult to find in advance because the shipped cable cannot be dissected and analyzed, so that the inventor designs the technical scheme, when the technical scheme is used, a hole is formed in the copper shell of the cable connector or a nearby aluminum sheath, a probe 19 on a detection head 1 is inserted into the hole, the probe 19 is made of an insulating material, a through hole is formed in the probe 19, when the cable is wetted when water enters the cable, hydrogen and enters a second shell 9 of the detection head 1 through the probe 19 and reacts with a hydrogen sensor 23 in the second shell 9, and the main body 2 can be used for quickly measuring whether hydrogen enters the detection head 1, so as to judge whether the cable is wetted when water enters the cable; meanwhile, in the present embodiment, in order to facilitate the replacement of the probe 19, a coupling nut 20 for coupling the probe 19 and the second housing 9 is further provided on the second housing 9.
Example 2
On the basis of embodiment 1, the bottom of second casing 9 is equipped with the arch that matches with coupling nut 20, is equipped with the through-hole 16 that matches with connecting cylinder 21 on the arch, and through-hole 16 communicates external world and hydrogen sensor 23, connecting cylinder 21 is located through-hole 16, be equipped with the bulge loop on the circumference outer wall of connecting cylinder 21, coupling nut 20 has the shoulder hole, and coupling nut 20 and the protruding threaded connection of second casing 9 to the bulge loop of connecting cylinder 21 is fixed on the arch. The probe 1 further comprises a sealing ring 22, wherein the sealing ring 22 is sleeved on the connecting cylinder 21 and is positioned between the connecting cylinder 21 and the bulge.
In order to realize the quick connection between the probe 19 and the second shell 9, a downward-protruding bulge is arranged at the bottom of the second shell 9, a circle of convex ring is arranged on the circumferential outer wall of the connecting cylinder 21, the outer diameter of the convex ring is consistent with the minimum inner diameter of a stepped hole of the connecting nut 20, the connecting cylinder 21 connected with the probe 19 is inserted into the bottom of the bulge during installation, the connecting nut 20 is screwed, and the convex ring on the connecting cylinder 21 is fixed under the bulge by the connecting nut 20, so that the quick installation of the probe is completed, and the probe is convenient to replace; meanwhile, in order to ensure the air tightness between the connecting cylinder 21 and the bulges, a sealing ring 22 is arranged on the connecting cylinder 21, so that the tightness between the connecting cylinder 21 and the bulges is ensured.
Example 3
On the basis of embodiment 1, a fixing plate 14 and a plurality of fixing posts 17 are further disposed in the second housing 9, the fixing posts 17 are uniformly distributed on the inner bottom of the second housing 9, the fixing plate 14 is located on the top of the hydrogen sensor 23, electrodes on the hydrogen sensor 23 penetrate through the fixing plate 14, the fixing plate 14 is provided with a number of connecting screws 13 equal to the number of the fixing posts 17, and the connecting screws 13 penetrate through the fixing plate 14 and are connected with the fixing posts 17. The outer diameters of the fixing posts 17 are sequentially increased towards the inner bottom of the second housing 9, reinforcing ribs 18 are further arranged on the side walls of the fixing posts 17, and the reinforcing ribs 18 are connected with the inner wall of the second housing 9.
In order to ensure that the hydrogen sensor 23 can be stably fixed in the second housing 9, a fixing plate 14 is further disposed in the second housing 9, so that an electrode on the hydrogen sensor 23 is connected to the fixing plate 14, the fixing plate 14 is placed on top of each fixing column 17, the fixing plate 14 is fixedly connected to the fixing column by using a connecting screw 13, the fixing plate 14 is fixed on the fixing column 17, and thus the hydrogen sensor 23 is stably fixed in the second housing 9; simultaneously for improving fixed column 17's use intensity, so place the external diameter of fixed column 17 along the insole and increase progressively, fixed column 17 be conical structure promptly, effectively avoided fixed column 17 to break off, in order to further improve fixed column 17's intensity, still set up the strengthening rib 18 of being connected with second casing inner wall on fixed column 17's outer wall.
Example 4
On the basis of embodiment 1, still be equipped with two limiting plates 25 that are parallel to each other on the inner bottom of first casing 5, the top of limiting plate 25 all is equipped with the recess that matches with PCB board 12, PCB board 12 is located the recess. Two supporting plates 26 are further arranged on the inner bottom of the first shell 5, an arc-shaped groove matched with the battery 11 is formed in the top of each supporting plate 26, and the battery 11 is located on the arc-shaped groove; two clamping plates 24 are further arranged on the inner bottom of the first shell 5, and the two clamping plates 24 are respectively located on two sides of the battery 11 and can fix the battery 11 on the arc-shaped groove of the supporting plate 26.
In order to ensure that the arranged PCB 12 can be quickly installed in the first shell 5, two mutual limiting plates 25 are further arranged in the first shell 5, the distance between the limiting plates 25 is smaller than the length of the PCB 12, meanwhile, a groove matched with the PCB 12 is formed in the top of each limiting plate 25, and when the PCB 12 is installed, the PCB 12 is clamped into the groove of each limiting plate 25, so that the PCB 12 can be quickly installed in the first shell 5; meanwhile, in order to facilitate the rapid installation of the battery 11 in the first housing 5, a supporting plate 26 for limiting the battery 11 is further disposed in the first housing 5, during the installation, the battery 11 is flatly placed on the arc-shaped groove of the supporting plate 26, and the stable fixation of the battery 11 is realized by using the clamping plate 24 on the bottom in the first housing 5.
Example 5
On the basis of embodiment 1, both ends of wire 7 all are equipped with first connector 6, all be equipped with second connector 15 on the lateral wall of first casing 5 and second casing 9, first connector 6 and second connector 15 detachable connection. The second connector 15 comprises a fixed cylinder 29, a fixed nut 27, a retainer ring 31, a washer 28 and a plurality of elastic sheets 30, the fixed cylinder 29 is respectively inserted into the first shell 5 and the second shell 9, and the retainer ring 31 is positioned on the outer peripheral wall of the fixed cylinder 29 and is respectively positioned on the outer sides of the first shell 5 and the second shell 9; the fixing nut 27 is connected with the fixing cylinder 29 through threads, the fixing nut 27 is positioned in the first shell 5 and the second shell 9, and the retainer ring 31 is positioned between the retainer ring 31 and the fixing nut 27 and is respectively positioned at the outer sides of the first shell 5 and the second shell 9; the elastic pieces 30 are distributed on the end face of the fixed cylinder 29 in a circular ring array mode, the wires 7 stretch into the fixed cylinder 29 through the elastic pieces 30, the first connecting head 6 is connected with the fixed cylinder 29 through threads, and the first connecting head 6 can press the elastic pieces 30 to clamp the wires 7.
In order to realize the quick connection between the two ends of the wire and the probe 1 and the main body 2, holes are formed in the side walls of the first shell 5 and the second shell 9, when the probe is used, one end of the fixing cylinder 29 extends into the first shell 5 and the second shell 9 through the holes, then the fixing nut 27 is installed at the inner end of the fixing cylinder 29 located in the first shell 5 and the second shell 9, the fixing nut 27 is screwed, the fixing nut 27 is utilized to be matched with the retainer ring 31 on the fixing cylinder 29, the fixing cylinder 29 can be stably fixed on the first shell 5 and the second shell 9, then the wire 7 extends into the fixing cylinder 29 with the elastic sheet 30 end, the first connector 6 is rotated, and the elastic sheet 30 can be pressed to clamp the wire 7 in the rotating process of the first connector 6, so that the wire 7 is quickly connected with the probe 1 and the main body 2.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An online monitoring method for the water inlet and moisture of a cable joint is characterized by comprising the following steps:
1) A monitoring hole is formed at the tail end of the copper sleeve of the circuit connector;
2) The probe (1) is extended into the monitoring hole;
3) Sealing the monitoring hole by adopting aluminum powder glue, and fixing the probe (1) in the monitoring hole;
4) When the cable is damped, hydrogen generated is transmitted to the hydrogen sensor (23), and the hydrogen reacts with silicon materials on the hydrogen sensor (23) so as to detect whether the cable is damped;
the probe (1) is connected with the main body (2) through a wire (7), the main body (2) comprises a first cover body (4), a first shell (5), a PCB (printed circuit board) (12) and a battery (11), the first cover body (4) is detachably connected with the first shell (5), and the PCB (12) and the battery (11) are both located in the first shell (5);
detecting head (1) includes second lid (8), second casing (9), hydrogen sensor (23) and adapter (10), second lid (8) bonds with second casing (9), hydrogen sensor (23) are located second casing (9), adapter (10) include probe (19), connecting cylinder (21) and coupling nut (20), connecting cylinder (21) are connected with probe (19), coupling nut (20) can be connected connecting cylinder (21) and second casing (9).
2. The method for online monitoring the cable joint water inlet damp according to claim 1, wherein the step 1) specifically comprises: firstly, stripping a cable outer sheath semi-conducting layer at the tail end of a cable joint copper sleeve, wherein the size of the stripped semi-conducting layer is 80 x 80mm, then cutting the cable outer sheath at the middle part of the stripped cable outer sheath semi-conducting layer to form a 30 x 30mm window, and finally drilling a hole with the diameter of 3.5mm on the wave crest of the corrugated aluminum sheath, wherein the depth of the hole is not more than 3mm;
the step 3) further comprises the following steps: the cable is sealed by adopting an insulating tape, a waterproof tape, a semi-conducting tape and a PVC tape in sequence to restore the cable.
3. The online monitoring method for the water inlet and moisture of the cable joint according to claim 1, wherein a protrusion matched with the connecting nut (20) is arranged at the bottom of the second shell (9), a through hole (16) matched with the connecting cylinder (21) is formed in the protrusion, the through hole (16) communicates the outside with the hydrogen sensor (23), the connecting cylinder (21) is located in the through hole (16), a convex ring is arranged on the outer circumferential wall of the connecting cylinder (21), the connecting nut (20) is provided with a stepped hole, the connecting nut (20) is in threaded connection with the protrusion of the second shell (9), and the convex ring of the connecting cylinder (21) is fixed on the protrusion;
the probe (1) further comprises a sealing ring (22), and the sealing ring (22) is sleeved on the connecting cylinder (21) and is located between the connecting cylinder (21) and the protrusion.
4. The online monitoring method for the water inlet moisture of the cable joint according to claim 1, wherein a fixing plate (14) and a plurality of fixing posts (17) are further arranged in the second housing (9), the fixing posts (17) are uniformly distributed on the inner bottom of the second housing (9), the fixing plate (14) is located at the top of the hydrogen sensor (23), electrodes on the hydrogen sensor (23) penetrate through the fixing plate (14), the fixing plate (14) is provided with a number of connecting screws (13) which is the same as the number of the fixing posts (17), and the connecting screws (13) penetrate through the fixing plate (14) and are connected with the fixing posts (17).
5. The method for on-line monitoring of water inlet of cable joint is damped according to claim 4, characterized in that the outer diameter of the fixing column (17) increases in sequence towards the inner bottom of the second housing (9), the side wall of the fixing column (17) is further provided with a reinforcing rib (18), and the reinforcing rib (18) is connected with the inner wall of the second housing (9).
6. The method for online monitoring of water inflow and moisture of a cable joint according to claim 1, wherein two parallel limiting plates (25) are further disposed on the inner bottom of the first housing (5), the top of each limiting plate (25) is provided with a groove matching with the PCB (12), and the PCB (12) is located in the groove.
7. The method for on-line monitoring of cable joint water inlet damp according to claim 1, characterized in that two supporting plates (26) are further arranged on the inner bottom of the first shell (5), the top of the supporting plate (26) is provided with an arc-shaped groove matched with the battery (11), and the battery (11) is positioned on the arc-shaped groove;
still be equipped with two grip blocks (24) on the inner bottom of first casing (5), two grip blocks (24) are located the twice of battery (11) respectively, can fix battery (11) on the arc wall of backup pad (26).
8. The method for online monitoring of the water inlet and the moisture of the cable joint as claimed in claim 1, wherein the two ends of the conducting wire (7) are respectively provided with a first connector (6), the side walls of the first shell (5) and the second shell (9) are respectively provided with a second connector (15), and the first connector (6) and the second connector (15) are detachably connected.
9. The online monitoring method for the water inlet moisture of the cable joint as claimed in claim 8, wherein the second connector (15) comprises a fixed cylinder (29), a fixed nut (27), a retainer ring (31), a washer (28) and a plurality of spring plates (30), the fixed cylinder (29) is respectively inserted into the first shell (5) and the second shell (9), the retainer ring (31) is located on the outer peripheral wall of the fixed cylinder (29) and is respectively located on the outer sides of the first shell (5) and the second shell (9);
the fixing nut (27) is connected with the fixing cylinder (29) through threads, the fixing nut (27) is positioned in the first shell (5) and the second shell (9), and the retainer ring (31) is positioned between the retainer ring (31) and the fixing nut (27) and is respectively positioned on the outer sides of the first shell (5) and the second shell (9);
the shell fragment (30) are the ring array and distribute on the terminal surface of a fixed section of thick bamboo (29), wire (7) stretch into in a fixed section of thick bamboo (29) through shell fragment (30), first connector (6) are connected with a fixed section of thick bamboo (29) through the screw thread to first connector (6) can oppress shell fragment (30) and carry out the centre gripping to wire (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620352.7A CN113324703B (en) | 2021-06-03 | 2021-06-03 | Online monitoring method for water inlet and moisture of cable joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620352.7A CN113324703B (en) | 2021-06-03 | 2021-06-03 | Online monitoring method for water inlet and moisture of cable joint |
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