CN110346031B - Advanced pre-control device based on fiber bragg grating - Google Patents
Advanced pre-control device based on fiber bragg grating Download PDFInfo
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- CN110346031B CN110346031B CN201910691150.4A CN201910691150A CN110346031B CN 110346031 B CN110346031 B CN 110346031B CN 201910691150 A CN201910691150 A CN 201910691150A CN 110346031 B CN110346031 B CN 110346031B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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Abstract
The invention belongs to the crossing field of optical fiber sensing and electrical safety engineering, in particular to an advanced pre-control device based on fiber bragg grating; the device comprises a box body, a sleeve, a bearing seat, a ball screw, a shaft sleeve, a fixing plate, a first steel wire rope and a signal detector; the invention can be stably fixed under the shell of the electric device by matching the sleeve, the bearing seat, the ball screw, the shaft sleeve, the fixing plate and the first steel wire rope, and meanwhile, the plastic film and the fiber bragg grating which are arranged in the box body can also warn in time when the bolt is loosened; the square air bag and the sound channel arranged on the box body can release irritant gas and send sound to drive and warn illegal operators when the bolt is abnormally loosened; the invention can effectively and timely carry out advanced warning management and control on illegal operation, and reduces the possibility of accidents in mines.
Description
Technical Field
The invention belongs to the crossing field of optical fiber sensing and electrical safety engineering, and particularly relates to an advanced pre-control device based on an optical fiber grating.
Background
In the coal mine underground operation, the illegal operations such as live overhaul and the like occur, and the situations are very easy to cause electric shock accidents and even generate electric sparks to cause gas explosion; the regulation of coal mine safety regulations: "underground electric equipment, cables and wires cannot be overhauled and removed in a live way, non-professional or non-on-duty electric personnel cannot operate the electric equipment without permission, and mining area electricians cannot open the electric equipment of a mining area substation without permission for repair"; although a sound coal mine safety system exists, the implementation of the above items is still difficult to be completely guaranteed from technical equipment, some staff neglect safety regulations and illegal operations, great potential safety hazards are brought to coal mine production, and too many mechanical and electrical casualties and gas explosion accidents occur in coal mine enterprises. In order to avoid the occurrence of similar accidents, the coal mine electrical equipment needs to take technical solutions to fundamentally stop the accidents caused by the human factors so as to ensure the safety production of the underground coal mine, but the current solutions are inconvenient to operate, cannot be controlled in advance or are difficult to achieve intrinsic safety.
Aiming at the present, the problem that the existing technology for preventing the box cover of the electrical equipment from operating illegally is not enough is solved, the fiber bragg grating advanced pre-control device is designed, and the advanced control capability of the illegal operation is improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an advanced pre-control device based on fiber bragg gratings, which improves the advanced control capability of illegal operations.
The invention solves the technical problem by adopting the technical scheme that the advanced pre-control device based on the fiber bragg grating comprises a box body, a sleeve, a bearing seat, a ball screw, a shaft sleeve, a fixing plate, a first steel wire rope and a signal detector; the fixed plate is positioned below the box body and fixedly connected with the box body through triangular iron; the ball screw is positioned above the fixed plate, and the bottom end of the ball screw is connected with the fixed plate through a bearing; the shaft sleeve is positioned above the fixing plate and is in interference fit with a shaft at the bottom of the ball screw; the upper part of the ball screw is in interference fit with a bearing seat, the bearing seat is positioned below the sleeve, and the bearing seat is in interference fit with the sleeve; the surface of the ball screw is wound with a first steel wire rope, four first steel wire ropes are fixedly connected with four bolts respectively, and the tightness degree of the first steel wire rope can be adjusted by the up-and-down movement of the ball screw; when the mechanical device works, the mechanical device is placed in the center of the top of the mechanical device, the first steel wire rope with high toughness is used for connecting the bolts, the bolts connected with the first steel wire rope are twisted into the threaded holes, and the first steel wire rope can enter the threaded holes along the bolts; to connect a wire rope winding of accomplishing in the helicla flute on ball screw, after the winding finishes, use sleeve from the top to promote bearing frame extrusion ball screw, ball screw can change linear motion into rotary motion, the linear motion that the sleeve promoted the bearing frame can change into rotary motion, the bearing frame can be along ball screw downstream, ball screw can rotate simultaneously, a wire rope of winding on ball screw can be twined taut many times, wait for the sleeve no longer to push down, the function of locking has been realized in taut state with a bolted connection's wire rope.
Preferably, the fiber bragg grating is arranged on the inner side of the box body, the fiber bragg grating is fixedly connected with the box body, the fiber bragg grating is located between the bearing seat and the sleeve, a plastic film is arranged below the fiber bragg grating, and the plastic film is in contact with the fiber bragg grating; a first elastic plate is vertically arranged at the bottom of the plastic film, and the plastic film is embedded in the box body; the length of the first elastic plate is gradually increased from the middle part of the box body to two sides; the first elastic plate is connected with the plastic film through an elastic needle; an arc-shaped air bag is arranged between the shaft sleeve and the bearing seat and is fixedly connected with the bottom surface of the bearing seat; a second elastic plate which is inclined relative to the first steel wire rope is arranged on the surface of the first steel wire rope; a signal detector is arranged on the outer side of the box body; the fiber bragg grating) is communicated with a signal detector; when the first steel wire rope is locked, the sleeve is pressed downwards to extrude the arc-shaped air bag, the arc-shaped air bag is extruded and tilted upwards, and the tilted part of the arc-shaped air bag is contacted with the plastic film, so that the fiber bragg grating is supported by the tilted arc-shaped air bag; when the bolt locked by the first steel wire rope is loosened, the first steel wire rope shakes, and the second elastic plate arranged on the surface of the first steel wire rope shakes left and right along with the shaking of the first steel wire rope; the second elastic plate which shakes left and right is in contact with the first elastic plate arranged below the plastic film to generate shaking, the shaking of the second elastic plate and the first elastic plate drives the shaking of the elastic needle arranged above the first elastic plate, the surface of the plastic film fluctuates due to the shaking of the elastic needle, the fluctuant plastic film can be in contact with the fiber bragg grating, the wave crest of the fiber bragg grating changes, the signal detector connected with the fiber bragg grating can analyze the data change of the wave crest and warn in time, and the bolt loosening signal is captured in time, so that the abnormity detection device can manage and control abnormity in advance, and the abnormity occurrence probability is reduced.
Preferably, sound pipelines are arranged in the two ends of the box body and close to the first steel wire rope, and the sound pipelines are connected with the outside air and the inside of the box body; a second steel wire rope, an elastic rope, a metal ball and an arc-shaped metal sheet are arranged in the sound pipeline; one end, far away from the outside air, of the second steel wire rope is fixedly connected with the first steel wire rope, the other end of the second steel wire rope is fixedly connected with the elastic rope, and two ends of the elastic rope are fixedly connected with the pipe wall of the sound pipeline respectively; the metal ball is arranged on one side of the elastic rope far away from the box body, and the metal ball is fixedly connected with the elastic rope through a rod; the arc-shaped metal sheet is positioned on one side of the metal ball, which is far away from the box body, and is contacted with the metal ball, and two sides of the arc-shaped metal sheet are fixedly connected with the pipe wall of the sound pipeline; when the bolt locked by the first steel wire rope is loosened and the vibration amplitude generated by the first steel wire rope is not enough to enable the fiber bragg grating to vibrate, the sound pipeline arranged in the box body can amplify the sound generated by vibration and send out a warning; the first steel wire rope shakes, the second steel wire rope arranged on the first steel wire rope also shakes, the shaken second steel wire rope drives the elastic rope connected with the second steel wire rope to shake back and forth, and the metal ball connected with the elastic rope moves along with the back and forth movement of the elastic rope; when the metal ball moves back and forth and is in contact with the arc-shaped metal sheet, the arc-shaped metal sheet can generate sound, the elastic rope continuously shakes along with the second steel wire rope, and the metal ball continuously contacts with the arc-shaped metal sheet to generate sound; the sound generated by the arc-shaped metal sheet stops the operation of the personnel performing the trapezoidal illegal operation; the sound of shaking of a steel wire rope is amplified to warn illegal operators to stop operating through loosening of the bolts, and the effect of advanced management and control is achieved.
Preferably, square air bags are symmetrically arranged on two sides of the top of the box body, and irritant gas is filled in the square air bags; the square air bag is provided with an air bag plug and exhaust pipes, the air bag plug is fixedly connected with the inner wall of the air bag through a spring, and the exhaust pipes are symmetrically distributed on two sides of the air bag plug; one end of the plastic film, which extends into the box body, is fixedly connected with a third steel wire rope, the other end of the third steel wire rope is fixedly connected with an air bag plug, an air flow channel is arranged below the square air bag, one end of the air flow channel, which is far away from the sound pipeline, is communicated with the square air bag, and the other end of the air flow channel is communicated with the sound pipeline; when the person loosening the bolt does not see the warning of the fiber bragg grating and the sound emitted by the sound channel, the vibration caused by loosening the bolt drives the vibration of the first steel wire rope, the vibration generated by the first steel wire rope impacts the plastic film, the third steel wire rope connected with the plastic film is tensioned and connected with the air bag plug, the third steel wire rope is tensioned and drives the air bag plug to loosen, the loosening of the air bag plug can release irritant gas in the square air bag, the released irritant gas is released into the air through the airflow channel, the irritant gas can drive nearby people loosening bolts, when the illegal operator stops operating, the plastic film is not impacted any more, the third steel wire rope is not used for tensioning the air bag plug any more, the spring connected with the air bag plug can reset to drive the air bag plug to return to the original position, so that the release of irritant gas in the square air bag is prevented; when the irritant gas passes through the air flow channel and is discharged to the air, the air current can strike the metal ball that sets up in the sound channel, the metal ball that is strikeed can accelerate and the arc sheetmetal between the vibration, the vibration speed makes the sound that the arc sheetmetal produced more flood and bright more fast, and the operating personnel of violating the regulations is favorable to warning to flood and bright sound.
Preferably, the arrangement positions of the sleeves and the bolts are in an A shape; when the first steel wire rope is sufficiently tensioned, the sleeve is not pressed down any more, so that the ball screw is not rotated any more, the ball screw is subjected to the pulling force of the first steel wire rope in four directions, and the ball screw is stable on the fixed block and is not easy to slide due to the downward pulling force of the first steel wire rope; the first steel wire rope is fixedly connected with the bolt, the bolt is not loosened, the tension on the first steel wire rope cannot be changed, and the ball screw can be stably fixed on the fixed block for a long time by keeping the tension on the first steel wire rope unchanged; the A-shaped structure utilizes the stable pulling force of the first steel wire rope to fasten the ball screw, and the ball screw is stably fastened on the fixed block, so that the steel wire rope can be stably used for the above period, and the use stability of the steel wire rope is improved.
Preferably, the sleeve is provided with a clamping block and an L-shaped groove, the L-shaped groove is formed in the outer edge of the sleeve, the clamping block is arranged inside the L-shaped groove, the clamping block is fixedly connected with the inner wall of the sleeve through a spring, the inner wall of the box body is provided with a through hole, clamping grooves are formed in two sides of the through hole, and the clamping grooves are matched and clamped with the clamping block; limiting blocks are arranged on two sides of the outer wall of the bearing seat, and one ends of the limiting blocks, which are close to the bearing seat, are fixedly connected with the outer wall of the bearing seat; when the sleeve continuously descends, the ball screw can continuously tighten the first steel wire rope, and the first steel wire rope is broken when the tension borne by the first steel wire rope is larger than the tension borne by the first steel wire rope; meanwhile, the shaking of the bolt in the loosening process is too small to be found in time, and the bolt can be completely loosened to cause loss; when the sleeve is pressed downwards, the two clamping blocks arranged at the top of the sleeve move oppositely, so that the sleeve can be pressed downwards, and when the sleeve is pressed to a certain position, the limiting blocks arranged at the two sides of the bearing seat can block the sleeve from continuously descending, so that the situation that the first steel wire rope is broken due to overlarge tension is prevented; when the sleeve is pressed to the position of the limiting block, the sleeve is not pressed any more, and the clamping blocks on the two sides enter the clamping grooves under the reset of the springs to fix the sleeve; under the cooperation of the limiting block, the clamping block and the clamping groove, the sleeve is locked after being pressed down to a certain position, when the bolt loosens, the first steel wire rope is driven to loosen, the ball screw wound by the first steel wire rope moves upwards, the ball screw moving upwards cannot move upwards due to the blocking of the sleeve which is not fixed, the ball screw cannot move upwards, the tensile force of the first steel wire rope is not changed, and the bolt cannot be completely loosened, so that the stability of the steel wire rope fastening device is improved.
The invention has the technical effects and advantages that:
1. according to the advanced pre-control device based on the fiber bragg grating, the advanced pre-control device can be stably fixed through the cooperation of the sleeve, the bearing seat, the ball screw, the fixed block and the first steel wire rope, so that the advanced pre-control device can obtain a stable working state.
2. According to the advanced pre-control device based on the fiber bragg grating, the micro vibration on the first steel wire rope can be effectively collected in time under the matching work of the elastic needle, the first elastic plate, the second elastic plate and the plastic film, the abnormal conditions can be effectively collected, analyzed and forecasted in time in multiple modes, and the loss caused by untimely forecasting is reduced.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is an enlarged view of B in FIG. 3;
FIG. 5 is an enlarged view of C in FIG. 3;
FIG. 6 is an enlarged view of D in FIG. 3;
in the figure: the device comprises a box body 1, a fiber bragg grating 11, a plastic film 12, a first elastic plate 13, an elastic needle 14, a sound pipeline 15, a second steel wire rope 151, an elastic rope 152, a metal ball 153, an arc-shaped metal sheet 154, a square air bag 16, an air bag plug 161, an exhaust pipe 162, a third steel wire rope 163, an air flow channel 164, a through hole 17, a clamping groove 171, a sleeve 2, a clamping block 21, an 'L' -shaped groove 22, a bearing seat 3, a limiting block 31, a ball screw rod 4, a shaft sleeve 5, an arc-shaped air bag 51, a fixing plate 6, a first steel wire rope 7, a second elastic plate 71 and a signal detector 8.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-6, the advanced pre-control device based on fiber bragg grating of the present invention includes a box 1, a sleeve 2, a bearing seat 3, a ball screw 4, a shaft sleeve 5, a fixing plate 6, a first steel wire rope 7 and a signal detector 8; the fixed plate 6 is positioned below the box body 1 and fixedly connected with the box body 1 through triangular iron; the ball screw 4 is positioned above the fixing plate 6, and the bottom end of the ball screw 4 is connected with the fixing plate 6 through a bearing; the shaft sleeve 5 is positioned above the fixing plate 6, and the shaft sleeve 5 is in interference fit with a shaft at the bottom of the ball screw 4; the upper part of the ball screw 4 is in interference fit with the bearing seat 3, the bearing seat 3 is positioned below the sleeve 2, and the bearing seat 3 is in interference fit with the sleeve 2; a first steel wire rope 7 is wound on the surface of the ball screw 4, four first steel wire ropes 7 are fixedly connected with four bolts respectively, and the tightness degree of the first steel wire rope 7 can be adjusted by the up-and-down movement of the ball screw 4; when the mechanical device works, the mechanical device is placed in the center of the top of the mechanical device, the first steel wire rope 7 with high toughness is used for connecting bolts, the bolts connected with the first steel wire rope 7 are twisted into threaded holes, and the first steel wire rope 7 enters the threaded holes along the bolts; to connect a wire rope 7 winding of accomplishing in the helicla flute on ball screw 4, after the winding finishes, use sleeve 2 from the top to promote bearing frame 3 extrusion ball screw 4, ball screw 4 can change linear motion into rotary motion, the linear motion that sleeve 2 promoted bearing frame 3 can change rotary motion into, bearing frame 3 can be along ball screw 4 downstream, ball screw 4 can rotate simultaneously, a wire rope 7 of winding on ball screw 4 can be twined taut many times, wait for sleeve 2 no longer to push down, the function of locking has been realized in a taut state with a wire rope 7 of bolted connection.
As an embodiment of the invention, the fiber bragg grating 11 is arranged on the inner side of the box body 1, the fiber bragg grating 11 is fixedly connected with the box body 1, the fiber bragg grating 11 is positioned between the bearing block 3 and the sleeve 2, the plastic film 12 is arranged below the fiber bragg grating 11, and the plastic film 12 is in contact with the fiber bragg grating 11; a first elastic plate 13 is vertically arranged at the bottom of the plastic film 12, and the plastic film 12 is embedded in the box body 1; the length of the first elastic plate 13 is gradually increased from the middle part of the box body to two sides; the first elastic plate 13 is connected with the plastic film 12 through an elastic needle 14; an arc-shaped air bag 51 is arranged between the shaft sleeve 5 and the bearing seat 3, and the arc-shaped air bag 51 is fixedly connected with the bottom surface of the bearing seat 3; a second elastic plate 71 which is inclined relative to the first steel wire rope 7 is arranged on the surface of the first steel wire rope 7; a signal detector 8 is arranged on the outer side of the box body 1; the fiber bragg grating 11 is communicated with the signal detector 8; when the first steel wire rope 7 is locked, the sleeve 2 is pressed downwards to extrude the arc-shaped air bag 51, the arc-shaped air bag 51 is extruded to tilt upwards, and the tilted part of the arc-shaped air bag 51 is contacted with the plastic film 12, so that the tilted arc-shaped air bag 51 can abut against the fiber bragg grating 11; when the bolt locked by the first steel wire rope 7 is loosened, the first steel wire rope 7 shakes, and the second elastic plate 71 arranged on the surface of the first steel wire rope 7 shakes left and right along with the shaking of the first steel wire rope 7; the second elastic plate 71 which shakes left and right is in contact with the first elastic plate 13 arranged below the plastic film 12 to generate shaking, the shaking of the second elastic plate 71 and the first elastic plate 13 drives the shaking of the elastic needle 14 arranged above the first elastic plate 13, the shaking of the elastic needle 14 enables the surface of the plastic film 12 to fluctuate, the fluctuating plastic film 12 can be in contact with the fiber bragg grating 11 to enable the wave crest of the fiber bragg grating 11 to change, the signal detector 8 connected with the fiber bragg grating 11 can analyze and warn data changes of the wave crest in time, and by capturing bolt loosening signals in time, abnormity can be managed and controlled in time in advance, and therefore the probability of accidents is reduced.
As an embodiment of the invention, sound pipes 15 are arranged inside two ends of the box body 1 at positions close to the first steel wire rope 7, and the sound pipes 15 are connected with the outside air and the inside of the box body 1; a second steel wire rope 151, an elastic rope 152, a metal ball 153 and an arc-shaped metal sheet 154 are arranged in the sound pipeline 15; one end, far away from the outside air, of the second steel wire rope 151 is fixedly connected with the first steel wire rope 7, the other end of the second steel wire rope 151 is fixedly connected with the elastic rope 152, and two ends of the elastic rope 152 are fixedly connected with the pipe wall of the sound pipeline 15 respectively; the metal ball 153 is arranged on one side of the elastic rope 152 far away from the box body 1, and the metal ball 153 is fixedly connected with the elastic rope 152 through a rod; the arc-shaped metal sheet 154 is positioned on one side of the metal ball 153, which is far away from the box body, the arc-shaped metal sheet 154 is in contact with the metal ball 153, and two sides of the arc-shaped metal sheet 154 are fixedly connected with the pipe wall of the sound pipeline 15; when the bolt locked by the first steel wire rope 7 is loosened and the vibration amplitude generated by the first steel wire rope 7 is not enough to enable the fiber bragg grating 11 to vibrate, the sound pipeline 15 arranged in the box body 1 can amplify the sound generated by vibration and send out a warning; the first steel wire rope 7 shakes, the second steel wire rope 151 arranged on the first steel wire rope 7 also shakes, the shaken second steel wire rope 151 drives the elastic rope 152 connected with the second steel wire rope 151 to shake back and forth, and the metal ball 153 connected with the elastic rope 152 moves along with the back and forth movement of the elastic rope 152; when the metal ball 153 moves back and forth and contacts with the arc-shaped metal sheet 154, the arc-shaped metal sheet 154 can make a sound, the elastic rope 152 continuously shakes along with the shaking of the second steel wire rope 151, and the metal ball 153 continuously contacts with the arc-shaped metal sheet 154 to make a sound; the sound generated by the arc-shaped metal sheet 154 warns the staff of the illegal operation to stop the operation; the sound amplification of the vibration of the first steel wire rope 7 caused by the loosening of the bolt warns the illegal operator to stop operating, and the function of advanced management and control is achieved.
As an embodiment of the invention, square air bags 16 are symmetrically arranged on two sides of the top of the box body 1, and irritant gas is filled in the square air bags 16; the square airbag 16 is provided with an airbag plug 161 and an exhaust pipe 162, the airbag plug 161 is fixedly connected with the inner wall of the square airbag 16 through a spring, and the exhaust pipe 162 is symmetrically distributed on two sides of the airbag plug 161; one end of the plastic film 12 extending into the box body is fixedly connected with a third steel wire rope 163, the other end of the third steel wire rope 163 is fixedly connected with an air bag plug 161, an air flow channel 164 is arranged below the square air bag 16, one end, far away from the sound pipeline 15, of the air flow channel 164 is communicated with the square air bag 16, and the other end of the air flow channel 164 is communicated with the sound pipeline 15; when the person loosening the bolt disregards the warning of the fiber grating 11 and the sound emitted from the sound channel 15, the vibration caused by the loosening bolt drives the vibration of the first steel wire rope 7, the vibration generated by the first steel wire rope 7 impacts the plastic film 12, the third steel wire rope 163 connected with the plastic film 12 is tensioned, the third steel wire rope 163 is connected with the air bag plug 161, the third steel wire rope 163 is tensioned to drive the air bag plug 161 to loosen, the loosening of the air bag plug 161 can release the irritant gas in the square air bag 16, the released irritant gas is released into the air through the air flow channel 164, the irritant gas drives the person nearby loosening the bolt, when the illegal operator stops operating, the plastic film 12 is not impacted, the third steel wire rope 163 no longer tensions the air bag plug 161, the spring connected with the air bag plug 161 is reset to drive the air bag plug 161 to return to the original position, thereby preventing the release of the irritating gas inside the square shaped air cell 16; when the irritant gas is discharged into the air through the sound channel 15 through the gas flow channel 164, the gas flow impacts the metal ball 153 arranged in the sound channel 15, the impacted metal ball 153 accelerates the vibration with the arc-shaped metal sheet 154, the faster the vibration speed, the louder the sound generated by the arc-shaped metal sheet 154 is, and the louder sound is beneficial to warning illegal operators.
As an embodiment of the invention, the arrangement position of the sleeve 2 and the arrangement position of the bolt are in an 'A' shape; after the first steel wire rope 7 is sufficiently tensioned, the sleeve 2 is not pressed down any more, so that the ball screw 4 is not rotated any more, the ball screw 4 is subjected to the pulling force of the first steel wire rope 7 in four directions, and the ball screw 4 is stable on the fixing block 6 and is not easy to slide due to the downward pulling force of the first steel wire rope 7; the first steel wire rope 7 is fixedly connected with the bolt, the bolt is not loosened, the tension on the first steel wire rope 7 cannot be changed, and the ball screw 4 can be stably fixed on the fixed block for a long time by keeping the tension on the first steel wire rope 7 unchanged; the A-shaped structure utilizes the stable pulling force of the first steel wire rope 7 to fasten the ball screw 4, and the ball screw 4 is stably fastened on the fixing block 6, so that the novel steel wire rope tension device can be stably used for a long time, and the use stability of the novel steel wire rope tension device is improved.
As an embodiment of the present invention, the sleeve 2 is provided with a fixture block 21 and an "L" shaped groove 22, the "L" shaped groove 22 is disposed at an outer edge of the sleeve 2, the fixture block 21 is disposed inside the "L" shaped groove 22, the fixture block 21 is fixedly connected to an inner wall of the sleeve 2 through a spring, the inner wall of the box body 1 is provided with a through hole 17, two sides of the through hole 17 are provided with a fixture groove 171, and the fixture groove 171 is matched and clamped with the fixture block 21; limiting blocks 31 are arranged on two sides of the outer wall of the bearing seat 3, and one end, close to the bearing seat 3, of each limiting block 31 is fixedly connected with the outer wall of the bearing seat 3; when the sleeve 2 continuously descends, the ball screw 4 can continuously tighten the first steel wire rope 7, and the first steel wire rope 7 is broken when the tension force borne by the first steel wire rope 7 is larger than the tension force borne by the first steel wire rope; meanwhile, the shaking of the bolt in the loosening process is too small to be found in time, and the bolt can be completely loosened to cause accidents; when the sleeve 2 is pressed downwards, the two clamping blocks 21 arranged at the top of the sleeve 2 move oppositely, so that the sleeve 2 can be pressed downwards, and when the sleeve 2 is pressed to a certain position, the limiting blocks 31 arranged at the two sides of the bearing seat 3 can block the sleeve 2 from continuously descending, so that the situation that the first steel wire rope 7 is broken due to overlarge tension is prevented; when the sleeve 2 is pressed down to the position of the limiting block 31, the sleeve is not pressed down, and the clamping blocks 21 on the two sides enter the clamping grooves 171 under the reset of the springs to fix the sleeve 2; under the cooperation of the limiting block 31, the clamping block 21 and the clamping groove 171, the sleeve 2 is locked after being pressed down for a certain position, when the bolt loosens, the first steel wire rope 7 is driven to loosen, the ball screw 4 wound by the first steel wire rope 7 moves upwards, the ball screw 4 moving upwards cannot move upwards when being blocked by the fixed sleeve 2, the ball screw 4 cannot move upwards, the tensile force of the first steel wire rope 7 is unchanged, the bolt cannot be completely loosened, and therefore the pre-control capability of the invention is improved.
When the mechanical device works, the mechanical device is placed in the center of the top of the mechanical device, the first steel wire rope 7 with high toughness is used for connecting bolts, the bolts connected with the first steel wire rope 7 are twisted into threaded holes, and the first steel wire rope 7 enters the threaded holes along the bolts; winding a connected steel wire rope 7 in a spiral groove on a ball screw 4, after winding is finished, pushing a bearing seat 3 to extrude the ball screw 4 by using a sleeve 2 from top to bottom, wherein the ball screw 4 can convert linear motion into rotary motion, the linear motion of pushing the bearing seat 3 by using the sleeve 2 can be converted into rotary motion, the bearing seat 3 can move downwards along the ball screw 4, meanwhile, the ball screw 4 can rotate, and the steel wire rope 7 wound on the ball screw 4 can be wound and tensioned for multiple times; (ii) a When the first steel wire rope 7 is locked, the sleeve 2 is pressed downwards to extrude the arc-shaped air bag 51, the arc-shaped air bag 51 is extruded to tilt upwards, and the tilted part of the arc-shaped air bag 51 is contacted with the plastic film 12, so that the tilted arc-shaped air bag 51 can abut against the fiber bragg grating 11; when the bolt locked by the first steel wire rope 7 is loosened, the first steel wire rope 7 shakes, and the second elastic plate 71 arranged on the surface of the first steel wire rope 7 shakes left and right along with the shaking of the first steel wire rope 7; the second elastic plate 71 which shakes left and right is in contact with the first elastic plate 13 arranged below the plastic film 12 to generate shaking, the shaking of the second elastic plate 71 and the first elastic plate 13 drives the shaking of the elastic needle 14 arranged above the first elastic plate 13, the shaking of the elastic needle 14 enables the surface of the plastic film 12 to fluctuate, the fluctuating plastic film 12 can be in contact with the fiber bragg grating 11 to enable the wave crest of the fiber bragg grating 11 to change, the signal detector 8 connected with the fiber bragg grating 11 can analyze and warn data changes of the wave crest in time, and by capturing bolt loosening signals in time, the abnormal control can be conducted in advance, and therefore the abnormal occurrence probability is reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The advanced pre-control device based on the fiber bragg grating is characterized in that: the device comprises a box body (1), a sleeve (2), a bearing seat (3), a ball screw (4), a shaft sleeve (5), a fixing plate (6), a first steel wire rope (7) and a signal detector (8); the fixed plate (6) is positioned below the box body (1) and is fixedly connected with the box body (1) through a triangular iron; the ball screw (4) is positioned above the fixing plate (6), and the bottom end of the ball screw (4) is connected with the fixing plate (6) through a bearing; the shaft sleeve (5) is positioned above the fixing plate (6), and the shaft sleeve (5) is in interference fit with a shaft at the bottom of the ball screw (4); the upper part of the ball screw (4) is in interference fit with the bearing seat (3), the bearing seat (3) is positioned below the sleeve (2), and the bearing seat (3) is in interference fit with the sleeve (2); a first steel wire rope (7) is wound on the surface of the ball screw (4), the four first steel wire ropes (7) are fixedly connected with four bolts respectively, and the tightness degree of the first steel wire rope (7) can be adjusted by the up-and-down movement of the ball screw (4); the advanced pre-control device is placed at the center of the top of the mechanical device, a first steel wire rope (7) with high toughness is used for connecting bolts, the bolts connected with the first steel wire rope (7) are twisted into threaded holes, and the first steel wire rope (7) can enter the threaded holes formed in the top of the mechanical device along the bolts;
the optical fiber grating (11) is arranged on the inner side of the box body (1), the optical fiber grating (11) is fixedly connected with the box body (1), the optical fiber grating (11) is located between the bearing seat (3) and the sleeve (2), a plastic film (12) is arranged below the optical fiber grating (11), and the plastic film (12) is in contact with the optical fiber grating (11); a first elastic plate (13) is vertically arranged at the bottom of the plastic film (12), and the plastic film (12) is embedded in the box body (1); the length of the first elastic plate (13) is gradually increased from the middle part of the box body to two sides; the first elastic plate (13) is connected with the plastic film (12) through an elastic needle (14); an arc-shaped air bag (51) is arranged between the shaft sleeve (5) and the bearing seat (3), and the arc-shaped air bag (51) is fixedly connected with the bottom surface of the bearing seat (3); a second elastic plate (71) inclined relative to the first steel wire rope (7) is arranged on the surface of the first steel wire rope (7); a signal detector (8) is arranged on the outer side of the box body (1); the fiber bragg grating (11) is communicated with the signal detector (8);
the arrangement position of the sleeve (2) and the arrangement position of the bolt are in an A shape;
the sleeve (2) is provided with a clamping block (21) and an L-shaped groove (22), the L-shaped groove (22) is formed in the outer edge of the sleeve (2), the clamping block (21) is arranged inside the L-shaped groove (22), the clamping block (21) is fixedly connected with the inner wall of the sleeve (2) through a spring, a through hole (17) is formed in the inner wall of the box body (1), clamping grooves (171) are formed in two sides of the through hole (17), and the clamping grooves (171) are matched and clamped with the clamping block (21); and limiting blocks (31) are arranged on two sides of the outer wall of the bearing seat (3), and one end, close to the bearing seat (3), of each limiting block (31) is fixedly connected with the outer wall of the bearing seat (3).
2. The fiber grating-based advanced pre-control device according to claim 1, wherein: a sound pipeline (15) is arranged at a position, close to the first steel wire rope (7), in the two ends of the box body (1), and the sound pipeline (15) is connected with the outside air and the inside of the box body (1); a second steel wire rope (151), an elastic rope (152), a metal ball (153) and an arc-shaped metal sheet (154) are arranged in the sound pipeline (15); one end, far away from the outside air, of the second steel wire rope (151) is fixedly connected with the first steel wire rope (7), the other end of the second steel wire rope (151) is fixedly connected with the elastic rope (152), and two ends of the elastic rope (152) are fixedly connected with the pipe wall of the sound pipeline (15) respectively; the metal ball (153) is arranged on one side, far away from the box body (1), of the elastic rope (152), and the metal ball (153) is fixedly connected with the elastic rope (152) through a rod; arc sheetmetal (154) are located metal ball (153) and keep away from one side of box, just arc sheetmetal (154) with metal ball (153) contact, arc sheetmetal (154) both sides and sound pipeline (15) pipe wall link firmly.
3. The fiber grating-based advanced pre-control device according to claim 2, wherein: square air bags (16) are symmetrically arranged on two sides of the top of the box body (1), and irritant gas is filled in the square air bags (16); the square air bag (16) is provided with an air bag plug (161) and an exhaust pipe (162), the air bag plug (161) is fixedly connected with the inner wall of the square air bag (16) through a spring, and the exhaust pipe (162) is symmetrically distributed on two sides of the air bag plug (161); plastic film (12) stretch into the one end of box and have linked firmly No. three wire rope (163), No. three wire rope (163) other end links firmly with gasbag stopper (161), square gasbag (16) below is provided with airflow channel (164), airflow channel (164) are kept away from sound pipeline (15) one end and are communicate with square gasbag (16), airflow channel (164) other end and sound pipeline (15) intercommunication.
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| CN201910691150.4A CN110346031B (en) | 2019-07-29 | 2019-07-29 | Advanced pre-control device based on fiber bragg grating |
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| CN201910691150.4A CN110346031B (en) | 2019-07-29 | 2019-07-29 | Advanced pre-control device based on fiber bragg grating |
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| CN109631791A (en) * | 2019-01-18 | 2019-04-16 | 山东道宽智能科技有限公司 | A kind of passive roof delamination sensor of mining wide range fiber grating |
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| CN203973463U (en) * | 2014-07-16 | 2014-12-03 | 中国人民解放军63978部队 | The quick take-up device of a kind of steel wire rope |
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