CN210528149U - Elevator limit switch detection system - Google Patents
Elevator limit switch detection system Download PDFInfo
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- CN210528149U CN210528149U CN201921227923.5U CN201921227923U CN210528149U CN 210528149 U CN210528149 U CN 210528149U CN 201921227923 U CN201921227923 U CN 201921227923U CN 210528149 U CN210528149 U CN 210528149U
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Abstract
The utility model relates to an elevator security performance detects technical field, especially relates to an elevator limit switch detecting system. The inspection efficiency can be improved, the on-site safety of inspection personnel is ensured, and the detection precision is ensured. The distance measuring unit is used for measuring the moving distance of a tractor steel wire rope preset position above the elevator machine room platform under the detection working condition; the short circuit detection unit is used for monitoring a switch-on signal or a switch-off signal generated after the elevator car triggers the elevator limit switch; the control unit is respectively connected with the distance measuring unit and the short circuit detection unit and is used for receiving a connection signal generated by the short circuit detection unit so as to control the distance measuring unit to enter a working condition; and the data processing unit is provided with a group of preset value solidification program modules and is used for providing a calculation mode based on the traction of the elevator and calculating the moving distance recorded by the distance measuring unit under the detection working condition as a detection distance value.
Description
Technical Field
The utility model relates to an elevator security performance detects technical field, especially relates to an elevator limit switch detecting system.
Background
The special equipment safety technical specification TSG is a mandatory requirement for specifying safety performance and energy saving requirements of special equipment and corresponding contents of design, manufacture, installation, repair, reconstruction, use management and inspection, detection methods, and the like. The fifth part relates to elevators, new reference numbers TSGT7001-2017, namely elevator supervision and inspection and periodic inspection rules-traction and forced drive elevators.
The elevator limit switch detection is item 3.10 in the new standard and is a B-type detection item. The new standard, item 3.10, detects that "limit switches should be installed at the upper and lower ends of the shaft, the switches act before the car or the counterweight contacts the buffer, and keep the action state during the buffer is compressed. After the limit switch of the forced drive elevator is operated, the power supply circuit of the main machine and the brake should be directly cut off by a forced mechanical method. The B-type detection items comprise the following specific contents: "review the files and data provided, check the items and compare with the self-checking result". Therefore, the elevator limit switch belongs to a key detection item, and the requirements of time and frequency are slightly different according to actual conditions, but are higher than other detection items.
When elevator limit switch is detected at the well among the prior art, the problem that exists is: when the limit switch of the hoistway elevator is detected, the lower part of the car and the upper part of the car buffer belong to a dangerous operation space, so that a tester has higher operation risk during field detection, the operation time of detection in the dangerous operation space is long, in addition, the detection requirements of B-type detection items are required to be compared, the precision requirement on detection points is high, the detection is frequent, and the manual detection workload is large. In order to solve the problems in the prior art, a system and a method specially used for detecting an elevator limit switch are needed to be provided, so that detection of detection personnel is facilitated, and operation risks of the detection personnel are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a method and elevator limit switch detecting system that elevator limit switch detected, when being used for solving well elevator limit switch among the prior art and examining, the inconvenience of manual inspection operation, especially, the below of car, the top of car buffer belongs to dangerous operation space, the inspection personnel have higher operation risk when the on-the-spot inspection, and the activity duration that detects in dangerous operation space is long, in addition, B type detects the project requirement and detects and compares, the required precision to the check point is high, it is high to detect the operation risk, it is frequent to detect, the manual work volume of detecting is big.
An elevator limit switch detection system comprising:
the distance measuring unit is used for measuring the moving distance of a tractor steel wire rope preset position above the elevator machine room platform under the detection working condition;
the short circuit detection unit is used for monitoring a switch-on signal or a switch-off signal generated after the elevator car triggers the elevator limit switch;
the control unit is respectively connected with the distance measuring unit and the short circuit detecting unit and is used for receiving a connection signal generated by the short circuit detecting unit so as to control the distance measuring unit to enter the working condition;
the data processing unit is provided with a group of preset numerical curing program modules and is used for providing a calculation mode based on elevator traction and calculating the moving distance recorded by the distance measuring unit under the detection working condition as a detection distance value;
the data processing unit at least comprises a data recording module which is used for recording the preset numerical value and the detection distance value;
the data processing unit at least comprises a data comparison module which is used for comparing the preset value with the detection distance value;
when the detection distance value is within the preset numerical range, a signal output by the data processing unit is a first detection signal;
when the detection distance value is not within the preset numerical range, one signal output by the data processing unit is a second detection signal; and
the sound and light alarm unit is used for receiving the disconnection signal of the short circuit detection unit to determine to send out sound and light alarm; or
To receive the second detection signal to determine to issue a qualifying prompt; or
The first detection signal is received to determine that an audible and visual alarm is given out.
Specifically, the ranging unit includes:
the laser ranging device is arranged on the elevator machine room platform and used for measuring the detection distance;
the distance measuring device power supply is used for supplying power to the laser distance measuring device and is driven by the control unit to work so that the laser distance measuring device enters the working condition;
the distance measurement output module is in data transmission connection with the data recording module and is used for transmitting the measurement detection distance to the data recording module;
the laser ranging apparatus further includes:
the laser target is fixed at a position to be detected so as to provide a target surface;
the input end of the laser range finder is arranged on the elevator machine room platform and is adjacent to the position to be detected;
the laser range finder is electrically connected with the power supply of the range finding device;
the output end of the laser range finder faces the target surface and provides a range finding light beam which is output to the target surface and is perpendicular to the elevator machine room platform;
the position to be detected is a tractor steel wire rope of a tractor on an elevator machine room platform;
the target surface is adjustable relative to the laser target, so that when the steel wire rope of the traction machine inclines in the ascending or descending motion process of the lift car, the target surface is kept parallel to the elevator machine room platform under the working condition;
the laser target is provided with a locking structure, and the locking structure is used for fixing the laser target at the position to be detected;
the locking structure includes:
a first housing;
the second shell is connected with the first shell in a buckling way through a pivot;
a lay length structure which is a hollow body formed when the first shell and the second shell are buckled;
the lay length structure is provided with a plurality of continuous thread marks, and the thread marks can be clamped among a plurality of lay length gaps of the tractor steel wire rope;
the ear seats are arranged on two sides of a gap formed when the first shell and the second shell are buckled in a one-to-one correspondence mode;
the locking piece is a combination of a bolt and a nut and is used for locking two lug seats which are adjacently arranged at two sides of the gap;
at least two clamping holes are formed in the first shell or the second shell in the radial direction, the clamping holes are communicated with the lay length structure, and internal threads are formed in the clamping holes;
the clamping rods are arranged in one-to-one correspondence with the clamping holes and are connected with the clamping holes through threads;
one end that the laser target kept away from wire rope has the adjustment structure, the adjustment structure includes:
the box body is internally provided with a hollow cavity A, an opening B is arranged below the hollow cavity A, and the hollow cavity A is communicated with the opening B;
the two ends of the rotating shaft are rotatably connected in the hollow cavity, and the rotating shaft is arranged in parallel along the horizontal direction of the box body;
the first end of the hanging rod is rotatably connected to the middle part of the rotating shaft;
the second end of the hanging rod is fixedly connected with the first end of the target core plate;
the second surface of the target center plate is provided with the target center surface, and the target center plate is perpendicular to the hanging rod;
wherein, a weight piece is arranged between the hanging rod and the target core plate, and the weight piece is fixed or can be partially fixed on the hanging rod; or the counterweight is fixed or can be partially fixed on the first surface of the target core plate, so that when the steel wire rope of the traction machine inclines, the hanging rod acts under the action of the counterweight to adjust the target core plate and keep parallel to the elevator machine room platform.
The box body at least comprises two symmetrical hanging rods, threaded holes communicated with the opening B are formed in the length direction of the box body, and a group of fixing rods penetrate through the threaded holes respectively;
the fixing rod is connected with the threaded hole through threads;
positioning blocks are fixed at one ends, close to the target core plate, of the fixing rods, and the positioning blocks arranged on the two fixing rods are used for being abutted against the first surface of the target core plate and enabling the target core plate to be fixed with the box body;
and a knob is fixed at one end of the fixing rod, which is far away from the target core plate.
Specifically, the short detection unit includes:
a control cabinet;
the short-circuit module is formed by connecting an elevator limit switch and a standby access end of the control cabinet limit switch;
the switch board is still integrated with:
the disconnection signal transmission module is in signal connection with the short-circuit module and transmits the disconnection signal to the sound and light alarm unit;
the connection signal transmission module is in signal connection with the short-circuit module and transmits the connection signal to the control unit;
the control unit includes:
a connection signal receiving module which is in signal connection with the connection signal transmission module;
the input end of the driving module is connected with the switch-on signal transmission module, and the output end of the driving module is electrically connected with the distance measuring device power supply and used for driving the distance measuring device power supply to start and enabling the elevator limit switch detection system to enter a working condition;
the curing program module, the data recording module and the data comparison module are connected in sequence in a data transmission manner;
wherein the solidified program module is one of a stmzet-based system component or a programmed computer terminal.
The utility model discloses following beneficial effect has:
this detecting system obtains the upper limit detection distance that is used for the calculation, lower limit detection distance H1 through setting up the range unit, the trigger condition that real-time detection limit switch can be guaranteed to the short circuit detecting element, the control unit is used for driving the range unit and can get into operating mode immediately when limit switch is triggered, carry out data processing through the data processing unit, specifically for calculating by solidification program module, the data logging module is taken notes, the comparison of data module is carried out, obtain measuring result, and through the audible and visual alarm unit.
Can the testing personnel need not to carry out the operation at danger space when detecting the elevator through this detecting system, and the conversion obtains upper limit switch actual measurement distance or lower limit switch actual measurement distance through the calculation of measuring distance, whether short circuit of detection limit switch that not only can last, and can show through alarm signal's mode, through ranging unit, solidification program module and give the calculation of towing ratio, it is more accurate to make the limit switch distance after detecting the calculation detect, this system of examining has application and application scope light, can improve detection efficiency by a wide margin, the inspection precision is high, reduce personnel working strength, guarantee inspection personnel site safety.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of a control unit of the present invention;
fig. 2 is a schematic diagram of the upper limit switch detection principle of the present invention;
fig. 3 is a schematic diagram of the detection principle of the lower limit switch of the present invention;
fig. 4 is a schematic structural view of the distance measuring device of the present invention;
fig. 5a is a first schematic view of the locking structure of the present invention;
fig. 5b is a second schematic view of the locking structure of the present invention;
fig. 6 is a schematic diagram of the short circuit detection unit of the present invention;
FIG. 7 is a schematic diagram of a system unit of the present invention;
FIG. 8 is a schematic flow diagram of a method of the present invention;
fig. 9 is a schematic view of the usage of the present invention.
The reference numerals in the figures denote:
an elevator machine room platform 100 and a traction machine 200;
the elevator comprises an elevator car 1, a top-layer end station 2, a bottom-layer end station 3, an upper limit switch 4, a lower limit switch 5, a counterweight buffer 6, a car buffer 7 and an elevator counterweight 8;
the energy-consumption buffer energy-consumption detection method comprises the following steps of (1) detecting an upper limit detection distance H2, a lower limit detection distance H1, an upper limit switch actual measurement distance J1, a lower limit switch actual measurement distance J2, an energy-consumption buffer preset number X and an energy-accumulation buffer preset number Y;
the system comprises a distance measuring unit 10, a short circuit detection unit 20, a control unit 30, a data processing unit 40, a curing program module 410, a data recording module 420, a data comparison module 430 and an audible and visual alarm unit 50;
the system comprises a laser ranging device 110, a ranging device power supply 120, a ranging signal output module 130, a laser target 1001, a target surface 1003 and a laser range finder 1002;
the device comprises a locking structure 1100, a first housing 1101, a second housing 1102, a lay length structure 1103, an ear seat 1104, a locking member 1105, a clamping hole 1106, a clamping rod 1107, an adjusting structure 1200, a box body 1201, a rotating shaft 1202, a hanging rod 1203, a bullseye plate 1204, a weight 1205, a fixing rod 1206 and a threaded hole 1207;
the control cabinet 210, the short circuit module 220, the disconnection signal transmission module 230, the connection signal transmission module 240, the connection signal receiving module 310 and the driving module 320.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, 2, 8 and 9, when the elevator car reaches a limit position end through turning from the triggering of the limit switch, the reading of the distance measuring device 8 is recorded, and a limit distance is obtained.
Referring to fig. 4, the method includes: the distance measuring unit 10 is used for measuring the moving distance of a steel wire rope preset position of the tractor 200 above the elevator machine room platform 100 under the detection working condition; specifically, the upper limit detection distance H2 and the lower limit detection distance H1 for calculation can be obtained by the distance measuring unit 10 measuring the distance of the preset position of the hoisting machine wire rope.
And the short circuit detection unit 20 is used for monitoring a switch-on signal or a switch-off signal generated after the elevator car triggers the elevator limit switch, and can meet the requirement of confirming whether the limit switch is triggered in the detection process. The control unit 30 is respectively connected with the distance measuring unit 10 and the short circuit detecting unit 20 and is used for receiving a connection signal generated by the short circuit detecting unit 20 so as to control the distance measuring unit 10 to enter a working condition; a data processing unit 40 having a set of preset values of a solidification program module 410 for providing a calculation method based on the elevator traction, calculating the moving distance recorded by the distance measuring unit 10 under the detection condition as a detection distance value; the data processing unit 40 at least includes a data recording module 420 for recording the preset value and the detected distance value; the data processing unit 40 at least includes a data comparison module 430 for comparing the preset value with the detected distance value; when the detected distance value is within the preset value range, a signal output by the data processing unit 40 is a first detection signal; when the detected distance value is not within the preset value range, a signal output by the data processing unit 40 is a second detection signal; and an audible and visual alarm unit 50 for receiving the disconnection signal of the short circuit detection unit 20 to determine to emit audible and visual alarm; or
The second detection signal is received to determine that the qualified prompt is sent; or to receive the first detection signal to determine to emit an audible and visual alarm. Therefore, the detection system obtains the upper limit detection distance H2 and the lower limit detection distance H1 for calculation by setting the distance measurement unit 10, the short circuit detection unit 20 can ensure the trigger condition of the real-time detection limit switch, the control unit 30 is used for driving the distance measurement unit 10 to enter the working condition immediately when the limit switch is triggered, data processing is performed through the data processing unit 40, specifically, calculation is performed through the solidification program module 410, recording is performed through the data recording module 420, and the data comparison module 430 performs comparison to obtain the measurement result, and the measurement result is displayed through the audible and visual alarm unit 50.
Referring to fig. 4, 5a and 5b, the distance measuring unit 10 includes:
the laser ranging device 110 is arranged on the elevator machine room platform 100 and used for measuring a detection distance; it is understood that the detection distances refer to an upper limit detection distance H2 and a lower limit detection distance H1.
The distance measuring device power supply 120 is used for supplying power to the laser distance measuring device 110 and is driven by the control unit 30 to work so that the laser distance measuring device 110 enters a working condition; so set up and guarantee when elevator limit switch is triggered, range unit opens.
The distance measurement output module 130 is in data transmission connection with the data recording module 420 and is used for transmitting the measured detection distance to the data recording module 420; the first display data obtained after the distance measuring device 110 is turned on, namely the upper limit detection distance H2 and the lower limit detection distance H1, which should be understood as data that has been corrected, specifically preset by the function of the laser distance measuring instrument in the prior art, and calculated starting from the actual detection data.
The laser ranging apparatus 110 further includes: a laser target 1001 for fixing at a position to be detected to provide a bullseye surface 1003; the input end of the laser range finder 1002 is arranged on the elevator machine room platform 100 and is adjacent to the position to be detected; the laser range finder 1002 is electrically connected with the range finder power supply 120;
wherein, the output end of the laser range finder 1002 faces the target surface 1003 and provides a range finding light beam which is output to the target surface 1003 and is vertical to the elevator machine room platform 100;
the position to be detected is a tractor steel wire rope of a tractor on the elevator machine room platform 100;
the target surface 1003 can be adjusted relative to the laser target 1001, so that when a steel wire rope of the traction machine inclines in the ascending or descending motion process of the lift car, the target surface 1003 is always parallel to the elevator machine room platform 100 under the working condition;
the laser target 1001 is provided with a locking structure 1100, and the locking structure 1100 is used for fixing the laser target 1001 at a position to be detected; specifically, the position to be detected proposes a way of measuring the preset position of the steel wire rope of the traction machine for distance measurement, and is shown in fig. 4, 5a and 5 b.
The locking structure 1100 includes: a first housing 1101; a second housing 1102 which is connected with the first housing 1101 by a pivot in a snap-fit manner; a lay length structure 1103 which is a hollow body formed when the first housing 1101 and the second housing 1102 are fastened together; the lay length structure 1103 has a plurality of continuous thread marks which can be clamped between a plurality of lay length gaps of the tractor steel wire rope; a plurality of ear seats 1104 are correspondingly arranged on two sides of a gap formed when the first shell 1101 and the second shell 1102 are buckled; a locking member 1105 which is a combination of a bolt and a nut and is used for locking two ear seats 1104 adjacently arranged at two sides of the gap;
in order to ensure that the laser target 1001 can be fixed on the traction machine wire, a locking structure 1100 is provided, and a lay length structure 1103 has a plurality of continuous thread traces to match the lay length of the wire rope, and the locking is realized by providing an ear base 1104 and a locking member 1105.
At least two clamping holes 1106 are formed in the first shell or the second shell in the radial direction, the clamping holes 1106 are communicated with the lay length structure 1103, and the clamping holes 1106 are provided with internal threads; the clamping rods 1107 are arranged in one-to-one correspondence with the clamping holes 1106 and are connected with the clamping holes 1106 through threads; in addition, the fastening action is further enhanced by the provision of the clamping holes 1106 and the clamping bars 1107.
wherein, a weight member 1205 is arranged between the hanging rod 1203 and the target core plate 1204, and the weight member 1205 is fixed on the hanging rod 1203 or can be partially fixed on the hanging rod 1203; either a weight 1205 is fixed or may be partially fixed to the first side of the bullseye plate 1204 so that when the machine rope is tilted, the hanging rod 1203 is actuated by the weight 1205 to adjust the bullseye plate 1204 and maintain it parallel to the elevator machine room platform 100.
The box body 1201 at least comprises two fixing rods 1206, the hanging rods 1203 are symmetrical, threaded holes 1207 communicated to the opening B are formed in the length direction of the box body 1201, and a group of fixing rods 1206 penetrate through the threaded holes 1207 respectively;
the fixing rod 1206 is in threaded connection with the threaded hole 1207; wherein, a positioning block is fixed at one end of the fixed rod 1206 close to the target core plate 1204, and the positioning blocks of the two fixed rods 1206 are used for abutting against the first surface of the target core plate 1204 and keeping the target core plate 1204 fixed with the box body 1201; wherein, a knob is fixed at one end of the fixing rod 1206 far away from the target core plate 1204.
Referring to fig. 4, 6 and 7, the short detection unit 20 includes:
a control cabinet 210; the short-circuit module 220 is formed by connecting an elevator limit switch and a standby access end of a limit switch of the control cabinet 210; the control cabinet 210 further integrates: the disconnection signal transmission module 230 is in signal connection with the short-circuit module 220 and transmits a disconnection signal to the audible and visual alarm unit 50; a connection signal transmission module 240 in signal connection with the short circuit module 220 and transmitting a connection signal to the control unit 30;
the control unit 30 includes: a connection signal receiving module 310 in signal connection with the connection signal transmitting module 240; the input end of the driving module 320 is connected with the connection signal transmission module 240, and the output end of the driving module is electrically connected with the distance measuring device power supply 120 and used for driving the distance measuring device power supply 120 to start and enabling the elevator limit switch detection system to enter a working condition;
the curing program module 410, the data recording module 420 and the data comparison module 430 are connected in sequence through data transmission; wherein the curing program module 410 is one of an STM32F103ZET6 based system component or a programmed computer terminal.
In addition, the data recording module 420 and the data comparing module 430 can also be implemented by the prior art, specifically, the data recording module 420 is an EEPROM memory or a DRAM memory, and the data comparing module 430 is an ARM processor, a DSP processor, or an FPGA processor.
Before the detection starts, the elevator car is driven to a preset end station, an elevator power supply system is cut off, the elevator car is stopped at the preset end station, and limit switches adjacent to the preset end station are used as detection target directions;
it will be appreciated that the detection of the upper limit switch 4 or the lower limit switch 5 can be achieved using the present method, the same principle.
When the elevator car is at the position of a preset end station, the elevator car is moved towards the direction of a detection target by a manual barring gear to trigger an adjacent limit switch; in the detection items, whether a limit switch is triggered or not needs to be detected, and the position is selected as a preset end station as the start.
When the elevator car triggers the limit switch, a switch-on signal is obtained, a distance measuring device at a preset position is started by the switch-on signal to measure the distance of a preset position of a steel wire rope of a tractor positioned on an elevator machine room platform, and a detection distance is obtained and recorded; the actual measurement distance J1 of the upper limit switch and the actual measurement distance J2 of the lower limit switch are actually generated when the elevator car triggers the limit switch, and the method uses the measured upper limit detection distance H2 and the measured lower limit detection distance H1 as a group of measurement data for conversion calculation and realizes distance measurement through the preset position of a steel wire rope of a tractor.
Calculating the recorded detection distance into an actually measured distance by a curing program module according to the elevator traction ratio;
providing a preset distance with an upper limit and a lower limit based on the type of elevator buffering, and comparing the actual measurement distance with the preset distance to obtain a first detection result;
when the elevator car starts to trigger the limit switch and reaches a limit position end through the turning gear, keeping a switch-on signal or generating a switch-off signal according to the elevator car and the limit switch as a second detection result;
and displaying the first detection result and the second detection result through a terminal device to finish detection.
Referring to fig. 9, the preset end station is one of a top end station or a bottom end station, and the direction of the detected target is determined in the following manner, including:
when the preset end station is the top end station, the position direction of the upper limit switch is the detection target direction; or
When the preset end station is the bottom end station, the lower limit switch position direction is the detection target direction.
Referring to fig. 9, the detection distance is one of the upper limit detection distance H2 or the lower limit detection distance H1;
wherein, the range unit of presetting the position and the position is preset according to following mode in advance to hauler wire rope, includes:
when the position direction of the limit switch is the detection target direction, a distance measuring device is arranged on one side of a steel wire rope connected with a traction machine of an elevator car, and the steel wire rope of the side above an elevator machine room platform is detected to obtain an upper limit detection distance H2; or
When the position direction of the lower limit switch is taken as a detection target, another distance measuring device is arranged on one side of a steel wire rope connected with a heavy weight tractor of the elevator, and the steel wire rope on the side above the platform of the elevator machine room is detected to obtain a lower limit detection distance H1.
Referring to fig. 9, the method for calculating the detected distance from a curing program module to the measured distance according to the elevator traction ratio includes:
the detection distance is one of an upper limit switch actual measurement distance J1 and a lower limit switch actual measurement distance J2;
the calculation formula carried by the curing program module is as follows:
the upper limit switch actually measures a distance J1, J1 is H2 multiplied by α;
the lower limit switch actually measures a distance J2, J2 is H1 multiplied by α;
wherein α is the latter item of the traction ratio, and the traction ratio is one of 1:1, 1:2 and 1: 4.
Referring to fig. 9, when providing the preset distance having the upper and lower limits, the preset distance setting manner includes two preset numbers X of energy-consuming buffers and Y of energy-collecting buffers;
wherein the preset number X of the energy-consuming buffers is 150-400 mm;
wherein the preset number Y of the energy-gathering buffer is 200-350 mm;
the preset distance changes the input range according to different types of the detected elevator buffer;
whether the actual measurement distance J1 of upper limit switch or the actual measurement distance J2 of lower limit switch falls into the preset distance range is judged, and the obtaining mode of the first detection result comprises:
the first detection result is qualified when the first detection result falls within the preset distance range;
if the first detection result is smaller than the lower limit of the preset distance range, the first detection result is unqualified;
and if the first detection result is greater than the preset distance range, the first detection result is unqualified.
Referring to fig. 1, 2, 8, and 9, the manner of turning to a limit position by the barring is as follows:
when obtaining the detection distance, through manual barring elevator, make elevator car continue to obtain the stroke with current direction to be extreme position end when the manual barring of elevator car is motionless, and judge the second testing result with following mode, include:
in the process of obtaining the stroke, continuously monitoring a connection signal, and enabling a second detection result to be qualified; or
In the process of obtaining the stroke, a disconnection signal is monitored, and a second detection result is unqualified;
and the terminal equipment displays the first detection result and the second detection result in a combined manner.
Use the technical scheme of this application, can detect personnel need not to carry out the operation in danger space when detecting the elevator through this detecting system, and change and obtain upper limit switch actual measurement distance or lower limit switch actual measurement distance through the calculation conversion of measuring distance, whether short circuit of detection limit switch that not only can last, and can show through alarm signal's mode, through the ranging unit, solidification program module and give the calculation of towing the ratio, it is more accurate to make the limit switch distance detection after detecting the calculation, this detection method and system have application and application scope light, can improve inspection efficiency by a wide margin, it is high to inspect the precision, reduce personnel working strength, guarantee inspector field safety.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (7)
1. An elevator limit switch detection system, comprising:
the distance measuring unit (10) is used for measuring the moving distance of a steel wire rope preset position of a tractor (200) above the elevator machine room platform (100) under the detection working condition;
a short circuit detection unit (20) for monitoring a switch-on signal or a switch-off signal generated after the elevator car triggers the elevator limit switch;
the control unit (30) is respectively connected with the distance measuring unit (10) and the short circuit detection unit (20) and is used for receiving a switch-on signal generated by the short circuit detection unit (20) so as to control the distance measuring unit (10) to enter the working condition;
a data processing unit (40) having a set of preset values of a solidification program module (410) for providing a calculation means based on elevator traction to calculate a moving distance recorded by the distance measuring unit (10) under the detection condition as a detection distance value;
wherein, the data processing unit (40) at least comprises a data recording module (420) for recording the preset value and the detection distance value;
wherein the data processing unit (40) comprises at least one data comparison module (430) for comparing the preset value with the detected distance value;
when the detection distance value is within the preset numerical range, a signal output by the data processing unit (40) is a first detection signal;
when the detection distance value is not within the preset numerical range, one signal output by the data processing unit (40) is a second detection signal; and
the acousto-optic alarm unit (50) is used for receiving the disconnection signal of the short circuit detection unit (20) to determine to send out an acousto-optic alarm; or
To receive the second detection signal to determine to issue a qualifying prompt; or
The first detection signal is received to determine that an audible and visual alarm is given out.
2. Elevator limit switch detection system according to claim 1, characterized in that the distance measuring unit (10) comprises:
the laser ranging device (110) is arranged on the elevator machine room platform (100) and is used for measuring the detection distance;
the distance measuring device power supply (120) is used for supplying power to the laser distance measuring device (110) and is driven by the control unit (30) to work so that the laser distance measuring device (110) enters the working condition;
and the ranging output module (130) is in data transmission connection with the data recording module (420) and is used for transmitting the measured detection distance to the data recording module (420).
3. The elevator limit switch detection system of claim 2, wherein the laser ranging device (110) further comprises:
a laser target (1001) for fixing at a position to be detected to provide a bullseye surface (1003);
the input end of the laser range finder (1002) is installed on the elevator machine room platform (100) and is adjacent to the position to be detected;
the laser range finder (1002) is electrically connected with the range finder power supply (120);
wherein the output of the laser range finder (1002) is directed towards the bullseye surface (1003) and provides a range finding beam perpendicular to the elevator machine room platform (100) and output towards the bullseye surface (1003);
the position to be detected is a traction machine steel wire rope of a traction machine on an elevator machine room platform (100);
the bull's-eye surface (1003) is adjustable relative to the laser target (1001), so that when the steel wire rope of the traction machine inclines in the process of ascending or descending of the lift car, the bull's-eye surface (1003) is constantly parallel to the elevator machine room platform (100) under the working condition.
4. The elevator limit switch detection system of claim 3, wherein the laser target (1001) has a locking structure (1100), the locking structure (1100) being used to secure the laser target (1001) in the position to be detected;
the locking structure (1100) comprises:
a first housing (1101);
a second housing (1102) which is connected with the first housing (1101) in a manner of being capable of being buckled through a pivot;
a lay length structure (1103) which is a hollow body formed when the first housing (1101) and the second housing (1102) are fastened together;
the lay length structure (1103) is provided with a plurality of continuous thread marks, and the thread marks can be clamped among a plurality of lay length gaps of the tractor steel wire rope;
the ear seats (1104) are arranged on two sides of a gap formed when the first shell (1101) and the second shell (1102) are buckled, and the ear seats (1104) are arranged on two sides of the gap in a one-to-one correspondence mode;
a locking member (1105) which is a combination of a bolt and a nut and is used for locking two lug seats (1104) adjacently arranged at two sides of the gap;
at least two clamping holes (1106) formed in the first shell or the second shell in the radial direction, wherein the clamping holes (1106) are communicated with the lay length structure (1103), and the clamping holes (1106) are provided with internal threads;
and the clamping rods (1107) are arranged in one-to-one correspondence to the clamping holes (1106) and are in threaded connection with the clamping holes (1106).
5. The elevator limit switch detection system of claim 4, wherein an end of the laser target (1001) distal from the wire rope has an adjustment structure (1200), the adjustment structure (1200) comprising:
the box body (1201) is internally provided with a hollow cavity (A), an opening (B) is arranged below the hollow cavity, and the hollow cavity (A) is communicated with the opening (B);
the two ends of the rotating shaft (1202) are rotatably connected in the hollow cavity, and the rotating shaft (1202) is arranged in parallel along the horizontal direction of the box body (1201);
a hanging rod (1203), the first end of which is rotatably connected with the middle part of the rotating shaft (1202);
the second end of the hanging rod (1203) is fixedly connected with the first end of the target core plate (1204);
wherein the bullseye surface (1003) is arranged on the second surface of the bullseye plate (1204), and the bullseye plate (1204) is vertical to the hanging rod (1203);
wherein, a weight member (1205) is arranged between the hanging rod (1203) and the target core plate (1204), and the weight member (1205) is fixed or can be partially fixed on the hanging rod (1203); or the weight (1205) is fixed or can be partially fixed on the first surface of the target core plate (1204), so that when the traction machine steel wire rope inclines, the hanging rod (1203) acts under the action of the weight (1205) to enable the target core plate (1204) to be adjusted and keep parallel with the elevator machine room platform (100);
the box body (1201) at least comprises two fixing rods (1206), the hanging rods (1203) are symmetrical, threaded holes (1207) communicated to the opening (B) are formed in the length direction of the box body (1201), and a group of fixing rods (1206) are respectively arranged in the threaded holes (1207) in a penetrating mode;
wherein the fixing rod (1206) is in threaded connection with the threaded hole (1207);
positioning blocks are fixed at one ends, close to the target core plate (1204), of the fixing rods (1206), and the positioning blocks arranged on the two fixing rods (1206) are used for being abutted against the first surface of the target core plate (1204) and enabling the target core plate (1204) to be fixed with the box body (1201);
wherein, a knob is fixed at one end of the fixing rod (1206) far away from the target core plate (1204).
6. Elevator limit switch detection system according to claim 5, characterized in that the short circuit detection unit (20) comprises:
a control cabinet (210);
the short-circuit module (220) is formed by connecting an elevator limit switch and a standby access end of the limit switch of the control cabinet (210);
the control cabinet (210) is further integrated with:
the disconnection signal transmission module (230) is in signal connection with the short-circuit module (220) and transmits the disconnection signal to the audible and visual alarm unit (50);
a connection signal transmission module (240) which is in signal connection with the short-circuit module (220) and transmits the connection signal to the control unit (30).
7. Elevator limit switch detection system according to claim 6, characterized in that the control unit (30) comprises:
a connection signal receiving module (310) in signal connection with the connection signal transmitting module (240);
the input end of the driving module (320) is connected with the connection signal transmission module (240), and the output end of the driving module is electrically connected with the distance measuring device power supply (120) and is used for driving the distance measuring device power supply (120) to start and enabling the elevator limit switch detection system to enter a working condition;
the curing program module (410), the data recording module (420) and the data comparison module (430) are connected in sequence in a data transmission manner;
wherein the solidified program module (410) is one of an STM32F103ZET6 based system component or a programmed computer terminal.
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CN110271933A (en) * | 2019-07-31 | 2019-09-24 | 王勇 | A kind of elevator limit switch detection method and its system |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN110271933A (en) * | 2019-07-31 | 2019-09-24 | 王勇 | A kind of elevator limit switch detection method and its system |
CN110271933B (en) * | 2019-07-31 | 2024-06-21 | 王勇 | Elevator limit switch detection method and system |
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