CN106643968A - Field lightning stroke-preventing liquid level monitoring sensor and monitoring method - Google Patents

Abstract

The invention relates to a field lightning stroke-preventing liquid level monitoring sensor and a monitoring method and belongs to the technical field of liquid level monitoring. The sensor is characterized in that the sensor is a static pressure input type liquid level monitoring sensor which is high in insulation grade, cannot form a breakdown circuit with a monitoring sensitive element, and is convenient to form an energy leaking path with the ground by lightning energy dependent on surrounding conductors. According to the sensor, on the premise of not changing the working precision of an existing static pressure input type liquid level monitoring sensor, a housing of the sensor and a sensing diaphragm which are directly exposed in the field are coated as an insulator with an elastomer which is good in non-conducting insulating property. The sensor can stably and reliably work for a long time in the field. The sensor provided by the invention is widely suitable for liquid level measurement of various media in systems and industries such as mines, water conservancy, agriculture, petrochemical engineering, metallurgy, electric power, pharmaceuticals, water supply and sewage and environmental protection.

Description

A kind of field anti-lightning level monitoring sensor and monitoring method

Technical field

A kind of field anti-lightning level monitoring sensor of the present invention and monitoring method, belong to level monitoring technical field, have Body is related to a kind of class of insulation height, can not be formed with monitoring sensing element and puncture loop, and thunderbolt energy relies on perimeter conductors convenient With the static pressure throw-in type level monitoring sensor that the earth constitutes energy leakage path, sensor of the invention is widely used in ore deposit The liquid level of the various media of the systems such as mountain, water conservancy, agricultural, petrochemical industry, metallurgy, electric power, pharmacy, water supply and sewage, environmental protection and industry Measurement.

Background technology

The static pressure throw-in type liquid level sensor that field uses in a large number is more and more extensive in all trades and professions level sensing application, holds The Detection task of load is more and more important, but due to the various complicated reason in production process in the wild, liquid level sensor is very It is easily damaged, especially great majority monitoring liquid has good electric conductivity, and it is a normality that liquid level connects thunder, especially in thunderstorm season Section, because static pressure throw-in type level monitoring sensor outer housing and sensor sensing diaphragm are metal good conductor, when liquid level connects thunder Sense that static pressure throw-in type level monitoring sensor outer housing and sensor sensing diaphragm are an inevitable phenomenons, along with biography Sensor reaction diaphragm accuracy determines that clearance for insulation and creep age distance are less in Sensor Design, so quiet under the conditions of thunderbolt The pressure throw-in type level monitoring sensor class of insulation declines quickly, the impaired failure of sensor sensing diaphragm, only under specific condition Secondary thunderbolt can be damaged, and broken by lightning, deterioration sensor insulating properties become the primary of static pressure throw-in type liquid level sensor damage Reason causes the extensive concern of insider, as described in paper " strong anti-lightning liquid level sensor "：With industrial, civilian and Personal weak electrical equipment is sharply increased, and the harm that the intrusion of induced lightening, lightning wave and surge is caused is greatly increased, become " The electronic epoch big public hazards ", the technical scheme involved by the paper address only signal transmission and supply side anti-lightning is asked Topic, as everybody knows wire have the very high nonmetallic crust of the class of insulation and other facilitate measure just can make thunderbolt affect be reduced to Minimum, and it is directly exposed to the good conductor in minefield：Sensor outer housing and sensing flexible sheet, due to the requirement of sensitiveness, this Flexible sheet will not be very thick, clearance for insulation and creep age distance when boning with the variable capacitance or variable resistor for being pasted onto the sensing back side Also control in minimum, therefore the possibility that punctures of Lightning Over-voltage or overcurrent and threat probabilities are big, are that its operation principle is determined , it is also technological difficulties that those skilled in the art's long-term follow is difficult to go beyond, become sensing when external thunder out of office or indirect lightning strike The most weak link of device and most flimsy position, are the main reasons of sensor degradation, although herein to improving throw-in type Liquid level sensor anti-lightning has done many substantive works, but for from sensing side lightning protection, this inherent problems does not have matter Improvement；As number of patent application be CN201310163096.9 described in, although solve sensibility elasticity diaphragm easily block, external force The problems such as easily scuffing, bridging distortion are failed, but it does not improve to Lightning Protection, and thunder and lightning generation is big when field runs into thunderbolt Energy still can be entered conveniently by the general soft elastic body of sensor metal shell, flexible sheet and electrical insulation capability To in sensor so that sensor decreasing insulating so that sensor is by broken by lightning.So current problem, remains In the urgent need to a kind of strong adaptability, low manufacture cost, can under above-mentioned adverse circumstances round-the-clock non-maintaining long-term stable operation Anti-lightning liquid level sensor, meets the real-time monitoring need of work of liquid level.

The content of the invention

The purpose of a kind of field anti-lightning level monitoring sensor of the present invention and monitoring method is：It is above-mentioned existing to solve Urgent problem in technology, high so as to disclose a kind of class of insulation, its dielectric strength is 20 DEG C in temperature value, and humidity value is 45%RH, rate of pressure rise is no more than 2.0 kV/s, and insulation breakdown test job voltage is 15kV/mm, lasts 1 minute, and nothing is hit Wear, be not easily formed with monitoring sensing element and puncture loop, thunderbolt energy relies on perimeter conductors conveniently to constitute energy with the earth and lets out The static pressure throw-in type field anti-lightning level monitoring sensor of leakage path.Sensor of the invention be widely used in mine, water conservancy, The level gauging of the various media of the systems such as agricultural, petrochemical industry, metallurgy, electric power, pharmacy, water supply and sewage, environmental protection and industry.

A kind of anti-lightning level monitoring sensor of the present invention, it is characterised in that be that a kind of class of insulation is high, it is sensitive with monitoring Element can not be formed and puncture loop, and the energy that is struck by lightning relies on perimeter conductors convenient and constitutes the static pressure input of energy leakage path with the earth Formula level monitoring sensor, the sensor under the premise of existing static pressure throw-in type level monitoring working sensor precision is not changed, The sensor outer housing and reaction diaphragm that are directly exposed to minefield are overmolding to into one with the elastomer of a non-conductive good insulation preformance exhausted Edge body, the elastomeric material refer to high purity can not be mixed into impurity silica gel, poly- fourth ethene or polyurethane insulating it is functional Material, elastomer inside is equipped with conduction liquid, detects that the static pressure that liquid level is produced is delivered to by elastomer equivalence Drain, then reaction diaphragm is delivered to by conduction liquid equivalence, level sensing had so both been realized, will be out of office external further through elastomer Become when thunder or indirect lightning strike the most weak and most flimsy sensor outer housing of sensor and the reaction diaphragm class of insulation strengthen with Tested liquid level conductor and pond are insulated, and when field pond connects thunder, anti-lightning level monitoring sensor by force can due to its insulating properties With lightning-arrest, the energy Releasing loop that the energy for producing that is struck by lightning just can be constituted along the good conductor beside sensor, released Put, so avoid thunderbolt environment sensor damage, and can under severe thunderbolt environment normal work, the sensing Device cheats the non-conductive conduction liquid 3 of 1, anti-lightning electric insulation flexible elastomer 2, inertia, open circles ring seat 4, bullet by monitoring liquid level is installed Property diaphragm 5, silicon cup 6, the first diffusion resistance 7, the second diffusion resistance 8, metal shell 9, pore conduit 10, signal power supply line 11, Containment vessel 12 is installed and sensor is fixed locking device 13 and constituted, its flexible sheet 5 is by welded and installed in open circles ring seat 4 Portion, flexible sheet 5 adopt miniature inductive sensitive diaphragm, its size be millimeter magnitude, its 50-100 square of milli of actual induction area Rice, its edge is installed on the bottom of silicon cup 6 and is bonded as one with adhesive glue with the inward flange of silicon cup 6, to avoid miniature inductive sensitive Diaphragm blocks bridging, and chemical attack and the scuffing of the sharp impurity of external force and anti-lightning are electrically insulated flexible elastomer 2 built with inertia Non-conductive conduction liquid 3 is fixed on the outer shroud upper position of metal shell 9 so that metal shell 9 is all electrically insulated flexible elastomer 2 cover, and the anti-lightning electric insulation port upper inner of flexible elastomer 2 passes through silicon with pore conduit 10 and the crust of signal power supply line 11 Glue insulation airtight connection, is then wrapped in the anti-lightning electric insulation port upper outside high pressure water-proof self-adhesion band of flexible elastomer 2, Its high pressure water-proof self-adhesion band be wrapped it is outside which floor PVC adhesive tape to make protective layer further around, the non-conductive conduction liquid 3 of such inertia is resisted Thunderbolt electric insulation flexible elastomer 2 is sealed in inside and outside open circles ring seat 4 and contacts with flexible sheet 5；First diffusion resistance 7, Two diffusion resistances 8 and silicon cup 6 be mounted on it is closed in metal shell 9, and by pore conduit 10 and signal power supply line 11 and liquid Air is communicated outside face, to further enhance the insulating properties of anti-lightning electric insulation flexible elastomer 2, loading containment vessel 12 is installed Front is micron-sized electric insulation paint in the outside even application thickness of anti-lightning electric insulation flexible elastomer 2, is then charged into installing Containment vessel 12 simultaneously locks sensor fixation locking device 13 in place, and sensor fixes locking device 13 and refers to PG9 or PG11 systems Row water joint, it is ensured that the communication ventilation cable that sensor pore conduit 10 and signal power supply line 11 are constituted is installed with sensor and protected Protective case 12 connects and positions.

The monitoring method of above-mentioned a kind of anti-lightning level monitoring sensor, it is characterised in that be by above-mentioned anti-lightning liquid level prison Survey sensor to be installed on monitoring liquid level hole 1 and ensure that foundation ditch end face and sensor fix the upper end of locking device 13 same In plane, the pressure equivalence that testing liquid liquid level is produced is delivered to the non-conductive biography of inertia by anti-lightning electric insulation flexible elastomer 2 This pressure equivalence is delivered to flexible sheet 5 by drain 3, the non-conductive conduction liquid 3 of inertia again, the impact to miniature inductive sensitive diaphragm Only form liquid level and the contact of sensibility elasticity diaphragm 5 in anti-lightning electric insulation flexible elastomer 2 and caused dead band, And for range accuracy does not change, useful range=original miniature inductive sensitive diaphragm calibrated span-sensor fixes locking device 13 upper ends liquid level range of equal value in approximately the same plane；One is excavated below the container ground level of surveyed liquid level Sensor installs duck eye and installs monitoring liquid level hole 1, and sensor fixes the upper end of locking device 13 and installs monitoring liquid level hole 1 In approximately the same plane, monitoring liquid level hole 1 is installed and is caused the pressure value that the conduction liquid of flexible sheet 5 is produced and is given full of liquid level Place the pressure value that liquid level is produced in the device pitting consistent, this ensures that there（As shown in Figure 1）Higher than chain-dotted line plane On liquid level change and act on it is proportional to the static pressure on reaction diaphragm, you can accurately and conveniently measure liquid level.

A kind of anti-lightning level monitoring sensor of the present invention and monitoring method, have an advantage in that：

Sensor of the invention is struck by lightning in the wild under environment, is surveyed in sensing and is caused liquid level by anti-lightning electric insulation flexible elastomer Sensor realizes reinforced insulation, possesses anti-lightning, and the non-maintaining real-time monitoring for realizing liquid level that can be steady in a long-term works.It is one The cheap high-performance sensors of kind of cost of manufacture, sensor of the invention be widely used in mine, water conservancy, agricultural, petrochemical industry, The level gauging of the various media of the systems such as metallurgy, electric power, pharmacy, water supply and sewage, environmental protection and industry.

Description of the drawings：

Fig. 1：A kind of mining anti-adverse environment level monitoring Fundamentals of Sensors figure

Label is respectively in figure：Sensor installs the non-conductive biography of monitoring liquid level hole 1, anti-lightning electric insulation flexible elastomer 2, inertia Drain 3, open circles ring seat 4, flexible sheet 5, silicon cup 6, the first diffusion resistance 7, the second diffusion resistance 8, sensor closed metal Shell 9, pore conduit 10, signal power supply line 11, installation containment vessel 12, sensor fix locking device 13.

Specific embodiment

Embodiment 1

The sensor will be directly exposed to thunder under the premise of existing static pressure throw-in type level monitoring working sensor precision is not changed The sensor outer housing and reaction diaphragm in area is overmolding to an insulator with the elastomer of a non-conductive good insulation preformance, the elastomer material Material refers to that high purity can not be mixed into silica gel, poly- fourth ethene or the polyurethane insulating material of good performance of impurity, the elastomer Inside is equipped with conduction liquid, detects that the static pressure that liquid level is produced is delivered to conduction liquid by elastomer equivalence, then by conduction liquid Equivalence is delivered to reaction diaphragm, has so both realized level sensing, during further through elastomer by external thunder out of office or indirect lightning strike Become the most weak and most flimsy sensor outer housing of sensor and the reaction diaphragm class of insulation strengthen with tested liquid level conductor and Pond is insulated, and when field pond connects thunder, anti-lightning level monitoring sensor just can be taken shelter from the thunder by force due to its insulating properties, conduction liquid Inertia and the non-conductive insulating properties that can further enhancing sensor outer housing and reaction diaphragm, be struck by lightning produce energy can With the energy Releasing loop constituted along the good conductor beside sensor, discharged, so avoided under thunderbolt environment The damage of sensor, and can under severe thunderbolt environment normal work, the sensor by install monitoring liquid level hole 1, anti-lightning The non-conductive conduction liquid 3 of electric insulation flexible elastomer 2, inertia, open circles ring seat 4, flexible sheet 5, silicon cup 6, the first diffusion resistance 7th, the second diffusion resistance 8, metal shell 9, pore conduit 10, signal power supply line 11, installation containment vessel 12 and sensor fixing lock Tight device 13 is constituted, its flexible sheet 5 by welded and installed inside open circles ring seat 4, flexible sheet 5 it is quick using miniature inductive Sense diaphragm, its size be millimeter magnitude, its actual induction area be 100 square millimeters, its edge be installed on the bottom of silicon cup 6 and with The inward flange of silicon cup 6 is bonded as one with adhesive glue, to avoid miniature inductive sensitive diaphragm from blocking bridging, chemical attack and external force cutting edge of a knife or a sword The scuffing of sharp impurity and anti-lightning electric insulation flexible elastomer 2 are fixed on outside metal shell 9 built with the non-conductive conduction liquid 3 of inertia Cause metal shell 9 to be all electrically insulated flexible elastomer 2 on ring upper position to cover, anti-lightning electric insulation flexible elastomer 2 Port upper inner passes through silicone insulation airtight connection with pore conduit 10 and the crust of signal power supply line 11, then in anti-lightning electricity The port upper outside high pressure water-proof self-adhesion band of insulation flexible elastomer 2 is wrapped, and outside is wrapped again in its high pressure water-proof self-adhesion band Which floor PVC adhesive tape to make protective layer around, the non-conductive conduction liquid 3 of such inertia is sealed in by anti-lightning electric insulation flexible elastomer 2 Open circles ring seat 4 is inside and outside and contacts with flexible sheet 5；First diffusion resistance 7, the second diffusion resistance 8 and silicon cup 6 are mounted on gold It is closed in category shell 9, and communicated with the outer air of liquid level by pore conduit 10 and signal power supply line 11, it is anti-to further enhance The insulating properties of thunderbolt electric insulation flexible elastomer 2, in anti-lightning electric insulation flexible elastomer 2 before installation containment vessel 12 is loaded Outside even application thickness is micron-sized electric insulation paint, is then charged into installing containment vessel 12 and sensor is fixed into locking dress Put 13 lockings in place, sensor fixes locking device 13 and adopts PG9 water joints,.

Above-mentioned anti-lightning level monitoring sensor is installed on into monitoring liquid level hole 1 and ensures that foundation ditch end face and sensor are fixed In approximately the same plane, anti-lightning electric insulation flexible elastomer 2 produces testing liquid liquid level to the upper end of locking device 13 Pressure equivalence is delivered to the non-conductive conduction liquid 3 of inertia, and this pressure equivalence is delivered to flexible sheet by the non-conductive conduction liquid 3 of inertia again 5, the impact to miniature inductive sensitive diaphragm is only to form liquid level and sensibility elasticity in anti-lightning electric insulation flexible elastomer 2 The contact of diaphragm 5 and caused dead band, and for range accuracy does not change, useful range=original miniature inductive sensitive diaphragm Calibrated span-sensor fixes the upper end of locking device 13 liquid level range of equal value in approximately the same plane；Surveyed The duck eye of one dead band height of excavation below the container ground level of liquid level causes the pressure that the conduction liquid of flexible resilient diaphragm 5 is produced Value is consistent with the pressure value that liquid level is produced in the device pitting is placed, and this ensures that theres（As shown in Figure 1）Higher than point Liquid level change and effect in line plane is proportional to the static pressure on reaction diaphragm, you can accurately and conveniently measure liquid level Highly.

Embodiment 2

Sensor fixes locking device 13 using PG11 series water joints, and flexible sheet 5 adopts miniature inductive sensitive diaphragm, its Size is millimeter magnitude, and its actual induction area is 50 square millimeters, and other are with embodiment 1.

Embodiment 3

Flexible sheet 5 adopts miniature inductive sensitive diaphragm, and its size is millimeter magnitude, and its actual induction area is less than 80 squares of millis Rice, other are with embodiment 1.

Claims (2)

1. a kind of anti-lightning level monitoring sensor, it is characterised in that be that a kind of class of insulation is high, can not with monitoring sensing element Formation punctures loop, and the energy that is struck by lightning relies on perimeter conductors convenient and constitutes the static pressure throw-in type liquid level prison of energy leakage path with the earth Sensor is surveyed, the sensor, will be directly sudden and violent under the premise of existing static pressure throw-in type level monitoring working sensor precision is not changed The sensor outer housing and reaction diaphragm for being exposed at minefield is overmolding to an insulator with the elastomer of a non-conductive good insulation preformance, the bullet Elastomer material refers to that high purity can not be mixed into silica gel, poly- fourth ethene or the polyurethane insulating material of good performance of impurity, should Elastomer inside is equipped with conduction liquid, detects that the static pressure that liquid level is produced is delivered to conduction liquid by elastomer equivalence, then by Conduction liquid equivalence is delivered to reaction diaphragm, has so both realized level sensing, further through elastomer by external thunder out of office or sensing Become sensor most weak and most flimsy sensor outer housing during thunderbolt and the reaction diaphragm class of insulation is strengthened and tested liquid level Conductor and pond are insulated, and when field pond connects thunder, anti-lightning level monitoring sensor just can be taken shelter from the thunder by force due to its insulating properties, The energy Releasing loop that the energy that thunderbolt is produced just can be constituted along the good conductor beside sensor, is discharged, thus Avoid thunderbolt environment sensor damage, and can under severe thunderbolt environment normal work, the sensor is by anti-thunder Hit electric insulation flexible elastomer（2）, the non-conductive conduction liquid of inertia（3）, open circles ring seat（4）, flexible sheet（5）, silicon cup（6）、 First diffusion resistance（7）, the second diffusion resistance（8）, metal shell（9）, pore conduit（10）, signal power supply line（11）, install Containment vessel（12）Locking device is fixed with sensor（13）Composition, its flexible sheet（5）By welded and installed in open circles ring seat （4）Internal, flexible sheet（5）Using miniature inductive sensitive diaphragm, its size be millimeter magnitude, its actual induction area 50-100 Square millimeter, its edge is installed on silicon cup（6）Bottom and and silicon cup（6）Inward flange is bonded as one with adhesive glue, micro- to avoid Type sensing sensitive diaphragm blocking bridging, chemical attack and the scuffing of the sharp impurity of external force and anti-lightning electric insulation flexible elastomer （2）Built with the non-conductive conduction liquid of inertia（3）It is fixed on metal shell（9）Metal shell is caused on outer shroud upper position（9）Entirely Portion is electrically insulated flexible elastomer（2）Cover, anti-lightning electric insulation flexible elastomer（2）Port upper inner and pore conduit （10）And signal power supply line（11）Crust passes through silicone insulation airtight connection, then in anti-lightning electric insulation flexible elastomer（2） Port upper outside high pressure water-proof self-adhesion band is wrapped, and outside is wrapped further around which floor PVC adhesive tape in its high pressure water-proof self-adhesion band Make protective layer, the non-conductive conduction liquid of such inertia（3）It is electrically insulated flexible elastomer by anti-lightning（2）It is sealed in open circles ring seat （4）Inside and outside and and flexible sheet（5）Contact；First diffusion resistance（7）, the second diffusion resistance（8）And silicon cup（6）It is mounted on gold Category shell（9）In it is closed, and by pore conduit（10）And signal power supply line（11）Communicate with the outer air of liquid level, be further Strengthen anti-lightning electric insulation flexible elastomer（2）Insulating properties, load install containment vessel（12）It is front to be electrically insulated in anti-lightning Flexible elastomer（2）Outside even application thickness is micron-sized electric insulation paint, is then charged into installing containment vessel（12）And will Sensor fixes locking device（13）In place, sensor fixes locking device for locking（13）Refer to that PG9 or PG11 series waterproofs connect Head.

2. usage right requires a kind of monitoring method of anti-lightning level monitoring sensor described in 1, it is characterised in that being will be above-mentioned Anti-lightning level monitoring sensor is installed on monitoring liquid level hole（1）And ensure that foundation ditch end face and sensor fix locking device（13） Upper end in approximately the same plane, anti-lightning electric insulation flexible elastomer（2）The pressure that testing liquid liquid level is produced is of equal value It is delivered to the non-conductive conduction liquid of inertia（3）, the non-conductive conduction liquid of inertia（3）Again this pressure equivalence is delivered to into flexible sheet（5）, Impact to miniature inductive sensitive diaphragm is only to form anti-lightning electric insulation flexible elastomer（2）Interior liquid level and sensibility elasticity Diaphragm（5）Contact and caused dead band, and for range accuracy does not change, useful range=original miniature inductive sensitive membrane Piece calibrated span-sensor fixes locking device（13）Upper end liquid level range of equal value in approximately the same plane； The duck eye that a dead band height is excavated below the container ground level of surveyed liquid level causes flexible resilient diaphragm（5）Conduction liquid produce Pressure value it is consistent with the pressure value that liquid level in the device pitting produces is placed, this ensures that there higher than chain-dotted line plane On liquid level change and act on it is proportional to the static pressure on reaction diaphragm, you can accurately and conveniently measure liquid level.