CN114955881A - Hoisting machinery safety detection device and detection method thereof - Google Patents
Hoisting machinery safety detection device and detection method thereof Download PDFInfo
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- CN114955881A CN114955881A CN202210739350.4A CN202210739350A CN114955881A CN 114955881 A CN114955881 A CN 114955881A CN 202210739350 A CN202210739350 A CN 202210739350A CN 114955881 A CN114955881 A CN 114955881A
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- wire rope
- detection device
- steel wire
- safety detection
- lifting hook
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/06—Arrangements or use of warning devices
- B66C15/065—Arrangements or use of warning devices electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
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- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a safety detection device and a detection method for hoisting machinery, and the safety detection device comprises a portal crane main body, wherein a sliding trolley is arranged above the portal crane main body, a frame is arranged at the bottom of the sliding trolley, a steel wire rope reeling and unreeling device and a first servo motor are arranged above the frame, and a steel wire rope is wound outside the steel wire rope reeling and unreeling device; the lifting hook mounting frame is arranged below the frame, and a lifting hook is mounted at the bottom of the lifting hook mounting frame; still include safety inspection device, its intermediate position department of setting in the frame bottom, magnetism memory planning device is all installed to the both sides of the inside upper end of safety inspection device, weak magnetism detection device is installed to magnetism memory planning device's below, weak magnetism detection device's data information passes through the AD conversion and sends to central processing unit, thereby has solved hoist safety inspection device and to the problem that wire rope's running state can not be mastered in real time comparatively single to wire rope detection mode.
Description
Technical Field
The invention relates to the technical field of hoisting machinery safety detection devices, in particular to a hoisting machinery safety detection device and a detection method thereof.
Background
The gantry crane is a bridge crane in which a bridge is supported on a ground rail by legs at both sides. Structurally, the gantry crane consists of a gantry, a cart running mechanism, a hoisting trolley, an electric part and the like, and with the continuous development of the technology in the field, safety problems in the running process of the gantry crane are rapidly improved as key items, and generally, comprehensive judgment is needed to be carried out on data such as strain, displacement, moment, temperature, wind speed, vibration and the like of the crane.
For example, the chinese granted patent publication No. CN102963828B entitled "method for health diagnosis and safety monitoring of hoisting machinery and apparatus thereof" includes a CPU module, a storage module, an a/D conversion module, a keyboard, a display screen, an audible and visual alarm output module, an inclination sensor or a speed sensor or/and an acceleration sensor, establishes a plurality of health files based on different reference values for the hoisting machinery through a health file establishment step, obtains a plurality of different monitoring values for the hoisting machinery through a regular physical examination step, compares the monitoring values under the same working condition with the corresponding reference values, and if the difference between the two values is within a preset error range, the hoisting machinery belongs to a healthy state and can be continuously used; if the difference between the two values exceeds the preset error range, the hoisting machine is in an unhealthy state and must be stopped.
The crane body can be detected in the prior art, detection data are analyzed in real time, rapid early warning is achieved, but for the crane steel wire rope, the safety detection mode is single, the running state of the steel wire rope cannot be mastered in real time, and therefore the existing requirements cannot be met.
Disclosure of Invention
The invention aims to provide a safety detection device and a detection method for a hoisting machine, and aims to solve the problem that the crane safety detection device provided in the background technology has a single detection mode for a steel wire rope, so that the running state of the steel wire rope cannot be mastered in real time.
In order to achieve the purpose, the invention provides the following technical scheme: a safety detection device and a detection method for hoisting machinery comprise a portal crane main body, wherein a sliding trolley is mounted above the portal crane main body, pulleys on two sides of the bottom of the sliding trolley are matched with the portal crane main body, a frame is arranged at the bottom of the sliding trolley, a steel wire rope winding and unwinding device and a first servo motor are mounted above the frame, an output shaft of the first servo motor is connected with a connecting shaft of the steel wire rope winding and unwinding device through a speed reducer, and a steel wire rope is wound outside the steel wire rope winding and unwinding device;
the steel wire rope passes through a pulley in the hook mounting rack, and a hook is mounted at the bottom of the hook mounting rack;
the safety detection device is arranged in the middle of the bottom of the vehicle frame, magnetic memory planning devices are mounted on two sides of the upper end of the interior of the safety detection device, a weak magnetic detection device is mounted below the magnetic memory planning devices, data information of the weak magnetic detection device is transmitted to a central processing unit through A/D conversion, and the output end of the central processing unit is transmitted to an operation terminal through a communication port;
the bottom of the safety detection device is provided with a swing detection device, and the swing detection device is connected with the safety detection device through threads.
Preferably, a stroke metering device is installed above the magnetic memory planning device, the steel wire rope is in contact with a metering wheel on one side of the stroke metering device, an image acquisition device is arranged below the weak magnetic detection device, and the steel wire rope passes through the centers of the magnetic memory planning device, the weak magnetic detection device and the image acquisition device.
Preferably, the second coil spring is all installed to the inside both sides of lifting hook mounting bracket, the outside kinking of second coil spring has the arc coil of strip, and the one end of arc coil of strip extends to the outside of lifting hook mounting bracket, the fixed installation head that is provided with of one end of arc coil of strip, first radar ranging sensor is installed in the outside of installation head, second radar ranging sensor is installed to the bottom of installation head, and first radar ranging sensor and second radar ranging sensor's signal output part sends central processing unit to through the AD conversion.
Preferably, the arc coil of strip is located the upper and lower centre gripping wheel and the delivery wheel of installing respectively of the inside one end of lifting hook mounting bracket, the top of centre gripping wheel is provided with second servo motor, and second servo motor's output shaft passes through belt drive with the centre gripping wheel.
Preferably, swing detection device's inner wall is provided with a plurality of pressure sensor that are annular equidistance and distribute, and pressure sensor signal output part sends to central processing unit through the AD conversion, pressure sensor's inboard is provided with the movable block the same with its quantity, and wire rope passes swing detection device's the centre of a circle, both sides between movable block and the pressure sensor are all fixed and are provided with the spring, the fixed thimble that is provided with of intermediate position department in the movable block outside.
Preferably, a steel wire rope stabilizing mechanism is installed above the swing detection device, two rows of longitudinally distributed stabilizing wheels are arranged inside the steel wire rope stabilizing mechanism, the steel wire rope passes through the adjacent stabilizing wheels, and the steel wire rope is tightly attached to the stabilizing wheels.
Preferably, first coil spring is all installed to the lower extreme of safety inspection device both sides, the outside of first coil spring has all twined the book and has connected the rope, connects the one end of rope and extends to safety inspection device's below, and connects the one end and the lifting hook mounting bracket fixed connection of rope.
Preferably, the central processing unit and the operation terminal can perform on-site acousto-optic alarm on the gantry crane main body.
Preferably, the upper end of the safety detection device is fixed with the frame through a bolt.
The detection method of the hoisting machinery safety detection device comprises the following steps:
after the lifting hook lifts a cargo, the output of a second servo motor is arranged under the transmission of a belt to enable a clamping wheel to rotate, so that an arc-shaped steel coil extends from the inside of a lifting hook mounting frame to the outside, a second radar ranging sensor below a mounting head at one end of the mounting head sends out a wave beam to the lifted object, after the electromagnetic wave contacts the lifted object, part of the electromagnetic wave is reflected, the reflected electromagnetic wave is received by a receiver to calculate the distance, the mounting head moves towards one end of the lifted object continuously, when distance information breaks a cliff, the mounting head moves to two sides of the cargo, at the moment, the first radar ranging sensor is used for monitoring the distance between the lifted object and the landing leg of the portal crane, the alarm frequency is improved along with the continuous approach of the lifted object and the landing leg, and a worker can clearly know the condition of the lifted object;
step two, when the steel wire rope swings, the steel wire rope contacts the movable block, the movable block moves towards the inner side at the moment, the spring is extruded, and the pressure is also generated on the pressure sensor when the spring contracts, so that the whole contraction interval is an early warning interval according to the elastic coefficient of the spring, when a pressure signal generated in the range is sent to the central processing unit, the conventional early warning is only kept for the operation terminal, a control means is not carried out, the swing amplitude of the steel wire rope is continuously improved, the spring is completely contracted, the thimble is contacted with the pressure sensor, the swing amplitude exceeds a set value, the site acousto-optic alarm is rapidly carried out, and a worker is informed to process the swing amplitude;
thirdly, forming a given weak electromagnetic field by a magnetic memory planning device fixed at a detection position, magnetizing a ferromagnetic steel wire rope in the magnetic field by the weak electromagnetic field, changing the steel wire rope in the detected area into a detectable state, acquiring magnetic energy potential difference information distributed and memorized in a steel wire rope volume element by the weak magnetic detection device, combining the winding and unwinding distance of the travel metering device on the steel wire rope with the acquired information on the surface of the steel wire rope, converting and storing the acquired information according to a set mathematical model and a data system by a digital A/D converter, transmitting real-time dynamic data information of the steel wire rope to a central processing unit, and generating wire breakage, abrasion, corrosion and fatigue on the steel wire rope due to strength loss;
and step four, if the fatigue value of the steel wire rope exceeds a set range, the image acquisition device can locally record images of the passing steel wire rope, collect and send the damage information to the operation terminal, and meanwhile, the gantry crane can perform on-site acousto-optic alarm on the main body of the gantry crane.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention carries on the damage monitoring to the wire rope in real time by adopting non-contact, the general wire rope uses the high strength carbon steel as the raw material, it has high magnetic permeability, forms the weak electromagnetic field which modulates through the magnetic memory planning device which is fixed on the detecting position, then magnetizes the ferromagnetic wire rope in the magnetic field through the weak electromagnetic field, changes the wire rope in the detected area into the detectable state, collects the magnetic energy potential difference information which is distributed and memorized in the wire rope volume element through the weak magnetic detecting device, at the same time, the distance of the stroke metering device to the wire rope is combined with the information collected on the wire rope surface, converts and stores the collected information according to the set mathematical model and data system through the A/D converter, transmits the real time dynamic data information of the wire rope to the CPU, the wire breakage of the wire rope, the wire breakage, the magnetic loss, Wear and tear, corrosion, various damages such as tired, carry out qualitative, ration, location detection, if the tired numerical value of wire rope exceedes the settlement scope, image acquisition device can carry out the image recording to the wire rope part that passes through to combine damage information to collect and send to operation terminal, can on the one hand on the main part of gantry crane on-the-spot audible and visual alarm, this monitoring information of on the other hand passes through the communication port and sends to operation terminal, and the staff can know wire rope's damage condition according to monitoring information.
2. The invention realizes the swinging condition of the steel wire rope caused by wind speed or inertia by arranging the swinging detection device at the lower end of the safety detection device and utilizing the pressure sensor of the inner ring, when the steel wire rope swings, if the steel wire rope is contacted with the movable block, the movable block moves towards the inner side at the moment to extrude the spring, and the pressure is also caused to the pressure sensor when the spring contracts, so that the whole contracting interval is an early warning interval according to the elastic coefficient of the spring, the pressure signal generated in the range is sent to the central processing unit, only the conventional early warning is kept for the operation terminal, no control means is needed, if the swinging amplitude of the steel wire rope is continuously improved, the spring is completely contracted and the thimble is contacted with the pressure sensor, the swinging amplitude is represented to exceed the set value, the site acousto-optic alarm is rapidly carried out, the working personnel are informed to process, and the steel wire rope is not detected by the conventional anemometer by the mode, but the detection means is more direct and gives sufficient reaction time in consideration of the relationship that may occur when the wire rope moves.
3. The invention can adjust the length of the arc steel coil by installing the second coil spring on two sides in the hook mounting rack, after the hook lifts the goods, the output of the second servo motor is arranged under the transmission of the belt to rotate the clamping wheel, so that the arc steel coil extends from the inside to the outside of the hook mounting rack, the second radar ranging sensor below the mounting head at one end of the hook sends out wave beams to the lifted object, after the electromagnetic waves contact the lifted object, part of the electromagnetic waves are reflected, the reflected electromagnetic waves are connected by the receiver to calculate the distance, the mounting head is moved towards one end of the lifted object continuously along with the movement of the mounting head, when the distance information breaks cliff, the mounting head is indicated to move to two sides of the goods, at the moment, the first radar ranging sensor can monitor the distance between the lifted object and the landing leg of the portal crane, along with the continuous approach of the distance between the lifted object and the landing leg, the frequency of the alarm is improved, and workers can clearly know the lifting condition, so that collision is avoided.
Drawings
FIG. 1 is a perspective view of a gantry crane body of the present invention;
FIG. 2 is a schematic view of the internal structure of the safety inspection device of the present invention;
FIG. 3 is a perspective view of the hook mounting bracket of the present invention;
FIG. 4 is an enlarged view of a portion of the area A of FIG. 2 in accordance with the present invention;
FIG. 5 is an enlarged view of a portion of the area B of FIG. 2 in accordance with the present invention;
FIG. 6 is a perspective view of the wobble detection apparatus of the present invention;
FIG. 7 is a schematic view of the internal structure of the wire rope stabilization mechanism of the present invention;
fig. 8 is a diagram of a steel wire rope safety detection system according to the present invention.
In the figure: 1. a gantry crane body; 2. a sliding trolley; 3. a frame; 4. a wire rope; 5. a hook mounting bracket; 6. a hook; 7. a steel wire rope reeling and unreeling device; 8. a first servo motor; 9. a safety detection device; 10. a stroke metering device; 11. a magnetic memory programming device; 12. a weak magnetic detection device; 13. an image acquisition device; 14. a wire rope stabilizing mechanism; 15. a first coil spring; 16. connecting ropes; 17. an arc-shaped steel coil; 18. a mounting head; 19. a first radar ranging sensor; 20. a second servo motor; 21. a clamping wheel; 22. a delivery wheel; 23. a swing detecting device; 24. a pressure sensor; 25. a movable block; 26. a spring; 27. a thimble; 28. a stabilizing wheel; 29. a second radar ranging sensor; 30. a central processing unit; 31. a communication port; 32. an operation terminal; 33. a second coil spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-8, an embodiment of the present invention: a safety detection device and a detection method for hoisting machinery comprise a portal crane main body 1, wherein a sliding trolley 2 is mounted above the portal crane main body 1, pulleys on two sides of the bottom of the sliding trolley 2 are matched with the portal crane main body 1, a frame 3 is arranged at the bottom of the sliding trolley 2, a steel wire rope winding and unwinding device 7 and a first servo motor 8 are mounted above the frame 3, an output shaft of the first servo motor 8 is connected with a connecting shaft of the steel wire rope winding and unwinding device 7 through a speed reducer, and a steel wire rope 4 is wound outside the steel wire rope winding and unwinding device 7;
the lifting device further comprises a lifting hook mounting frame 5, wherein the lifting hook mounting frame 5 is arranged below the frame 3, the steel wire rope 4 penetrates through a pulley in the lifting hook mounting frame 5, and a lifting hook 6 is mounted at the bottom of the lifting hook mounting frame 5;
the safety detection device 9 is arranged in the middle of the bottom of the frame 3, magnetic memory planning devices 11 are mounted on two sides of the upper end of the interior of the safety detection device 9, a weak magnetic detection device 12 is mounted below the magnetic memory planning devices 11, data information of the weak magnetic detection device 12 is transmitted to the central processing unit 30 through A/D conversion, and the output end of the central processing unit 30 is transmitted to the operation terminal 32 through the communication port 31;
the bottom of the safety detection device 9 is provided with a swing detection device 23, and the swing detection device 23 is connected with the safety detection device 9 through threads.
Referring to fig. 2 and 8, a stroke metering device 10 is installed above a magnetic memory planning device 11, a steel wire rope 4 contacts a metering wheel on one side of the stroke metering device 10, an image acquisition device 13 is installed below a weak magnetic detection device 12, the steel wire rope 4 passes through centers of the magnetic memory planning device 11, the weak magnetic detection device 12 and the image acquisition device 13, a fatigue value of the steel wire rope 4 exceeds a set range, and the image acquisition device 13 records a local image of the passing steel wire rope 4 and collects damage information to send the image to an operation terminal 32.
Referring to fig. 2 and 3, the second coil springs 33 are mounted on two sides inside the hook mounting frame 5, the arc-shaped steel coil 17 is wound outside the second coil springs 33, one end of the arc-shaped steel coil 17 extends to the outside of the hook mounting frame 5, the mounting head 18 is fixedly arranged at one end of the arc-shaped steel coil 17, the first radar ranging sensor 19 is mounted outside the mounting head 18, the second radar ranging sensor 29 is mounted at the bottom of the mounting head 18, signal output ends of the first radar ranging sensor 19 and the second radar ranging sensor 29 are converted into signals through a/D and transmitted to the central processor 30, the first radar ranging sensor 19 monitors the distance between the crane supporting legs and the goods, and the second radar ranging sensors 29 are used for positioning two ends of the goods.
Referring to fig. 2 and 4, a clamping wheel 21 and a conveying wheel 22 are respectively installed above and below one end of the arc-shaped steel coil 17 located inside the hook mounting frame 5, a second servo motor 20 is disposed above the clamping wheel 21, and an output shaft of the second servo motor 20 and the clamping wheel 21 are driven by a belt to extend the arc-shaped steel coil 17.
Referring to fig. 2, 5 and 6, a plurality of pressure sensors 24 are disposed on the inner wall of the swing detection device 23 and distributed in an annular and equidistant manner, and signal output ends of the pressure sensors 24 are converted by a/D and transmitted to the central processing unit 30, the inner sides of the pressure sensors 24 are provided with movable blocks 25 having the same number as the pressure sensors, the steel wire rope 4 passes through the center of the swing detection device 23, springs 26 are fixedly disposed on both sides between the movable blocks 25 and the pressure sensors 24, and a thimble 27 is fixedly disposed at the middle position of the outer side of the movable block 25, so that the steel wire rope 4 is not detected by a conventional anemometer, but the relationship possibly generated when the steel wire rope 4 moves is considered, the detection means is more direct, and sufficient reaction time is provided.
Referring to fig. 2 and 7, a wire rope stabilizing mechanism 14 is installed above the swing detection device 23, two rows of stabilizing wheels 28 are longitudinally distributed in the wire rope stabilizing mechanism 14, the wire rope 4 passes through the adjacent stabilizing wheels 28, and the wire rope 4 is tightly attached to the stabilizing wheels 28, so that the influence of swing on the non-contact detection above the wire rope is avoided.
Referring to fig. 1-3, the lower ends of the two sides of the safety detection device 9 are respectively provided with a first coil spring 15, the outside of the first coil spring 15 is respectively wound with a connecting rope 16, one end of the connecting rope 16 extends to the lower side of the safety detection device 9, and one end of the connecting rope 16 is fixedly connected with the hook mounting bracket 5, so that the safety detection device 9 and the hook mounting bracket 5 are flexibly connected.
Referring to fig. 8, the central processing unit 30 and the operation terminal 32 can perform on-site audible and visual alarm on the gantry crane body 1, so that the field worker can quickly pay attention to the alarm.
Referring to fig. 2, the upper end of the safety inspection device 9 is fixed to the frame 3 by bolts.
The detection method of the hoisting machinery safety detection device comprises the following steps:
step one, after the lifting hook 6 lifts the goods, the output of the second servo motor 20 is arranged under the transmission of a belt to rotate the clamping wheel 21, so that the arc-shaped steel coil 17 extends from the inside of the lifting hook mounting frame 5 to the outside, the second radar ranging sensor 29 under the mounting head at one end emits wave beams to the lifted object, after the electromagnetic waves contact the lifted object, a portion of the electromagnetic waves are reflected, the reflected electromagnetic waves are received by the receiver to calculate the distance, and as the mounting head 18 moves toward one end of the hoisted object, when the distance information generates a cliff, the mounting head 18 is indicated to move to two sides of the goods, at the moment, the first radar ranging sensor 19 is utilized to monitor the distance between the hoisted object and the support leg of the portal crane, the alarm frequency is increased along with the continuous approach of the distance between the hoisted object and the support leg, and the working personnel can clearly know the condition of the hoisted object;
step two, when the steel wire rope 4 swings, the steel wire rope 4 contacts the movable block 25, at the moment, the movable block 25 moves towards the inner side to extrude the spring 26, and the spring 26 also generates pressure on the pressure sensor 24 when contracting, so that the whole contracting interval is an early warning interval according to the elastic coefficient of the spring 26, when a pressure signal generated in the range is sent to the central processing unit 30, the conventional early warning is only kept for the operation terminal, a control means is not carried out, the swinging amplitude of the steel wire rope 4 is continuously improved, the spring 26 is completely contracted, the thimble 27 contacts the pressure sensor 24, the swinging amplitude is shown to exceed a set value, the site acousto-optic alarm is rapidly carried out, and a worker is informed to process the swing amplitude;
thirdly, forming a given weak electromagnetic field by a magnetic memory planning device 11 fixed at a detection position, magnetizing a ferromagnetic steel wire rope 4 in the magnetic field by the weak electromagnetic field, changing the steel wire rope 4 in the detected area into a detectable state, acquiring magnetic energy potential difference information distributed and memorized in a volume element of the steel wire rope 4 by a weak magnetic detection device 12, combining the retraction distance of a stroke metering device 10 to the steel wire rope 4 with the acquired information on the surface of the steel wire rope 4, converting and storing the acquired information according to a set mathematical model and a data system by a digital A/D converter, transmitting real-time dynamic data information of the steel wire rope 4 to a central processing unit 30, and generating wire breakage, abrasion, corrosion and fatigue of the steel wire rope 4 due to strength loss;
and step four, if the fatigue value of the steel wire rope 4 exceeds the set range, the image acquisition device 13 can locally record images of the passing steel wire rope 4, collect and send the damage information to the operation terminal 32 in combination, and meanwhile, carry out on-site acousto-optic alarm on the main body 1 of the gantry crane.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a hoisting machinery safety inspection device, includes gantry crane main part (1), slip dolly (2) are installed to the top of gantry crane main part (1), and the pulley and the gantry crane main part (1) of slip dolly (2) bottom both sides cooperate, the bottom of slip dolly (2) is provided with frame (3), wire rope receive and releases coiling apparatus (7) and first servo motor (8) are installed to the top of frame (3), and the output shaft of first servo motor (8) passes through retarder connection with the connecting axle of wire rope receive and releases coiling apparatus (7), the outside of wire rope receive and release coiling apparatus (7) is twined and is rolled up there is wire rope (4), its characterized in that:
the lifting device is characterized by further comprising a lifting hook mounting frame (5) which is arranged below the frame (3), a steel wire rope (4) penetrates through a pulley inside the lifting hook mounting frame (5), and a lifting hook (6) is mounted at the bottom of the lifting hook mounting frame (5);
the safety detection device is characterized by further comprising a safety detection device (9) which is arranged in the middle of the bottom of the vehicle frame (3), magnetic memory planning devices (11) are mounted on two sides of the upper end of the interior of the safety detection device (9), weak magnetic detection devices (12) are mounted below the magnetic memory planning devices (11), data information of the weak magnetic detection devices (12) is transmitted to the central processing unit (30) through A/D conversion, and the output end of the central processing unit (30) is transmitted to the operation terminal (32) through a communication port (31);
the bottom of the safety detection device (9) is provided with a swing detection device (23), and the swing detection device (23) is connected with the safety detection device (9) through threads.
2. The hoisting machinery safety detection device of claim 1, wherein: a stroke metering device (10) is installed above the magnetic memory planning device (11), a steel wire rope (4) is in contact with a metering wheel on one side of the stroke metering device (10), an image acquisition device (13) is arranged below the weak magnetic detection device (12), and the steel wire rope (4) passes through the centers of the magnetic memory planning device (11), the weak magnetic detection device (12) and the image acquisition device (13).
3. The hoisting machinery safety detection device of claim 2, wherein: second coil spring (33) are all installed to the inside both sides of lifting hook mounting bracket (5), the outside kinking of second coil spring (33) has arc coil of strip (17), and the one end of arc coil of strip (17) extends to the outside of lifting hook mounting bracket (5), the fixed installation head (18) that is provided with of one end of arc coil of strip (17), first radar range sensor (19) are installed in the outside of installation head (18), second radar range sensor (29) are installed to the bottom of installation head (18), and the signal output part of first radar range sensor (19) and second radar range sensor (29) sends to central processing unit (30) through the AD conversion.
4. The hoisting machinery safety detection device of claim 3, wherein: arc coil of strip (17) are located the upper and lower centre gripping wheel (21) and delivery wheel (22) of installing respectively of the inside one end of lifting hook mounting bracket (5), the top of centre gripping wheel (21) is provided with second servo motor (20), and the output shaft of second servo motor (20) passes through belt drive with centre gripping wheel (21).
5. The hoisting machinery safety detection device of claim 4, wherein: the inner wall of swing detection device (23) is provided with a plurality of pressure sensor (24) that are annular equidistance and distribute, and pressure sensor (24) signal output part sends to central processing unit (30) through the AD conversion, the inboard of pressure sensor (24) is provided with movable block (25) the same with its quantity, and wire rope (4) pass the centre of a circle of swing detection device (23), both sides between movable block (25) and pressure sensor (24) are all fixed and are provided with spring (26), the fixed thimble (27) that is provided with of intermediate position department in the movable block (25) outside.
6. The hoisting machinery safety detection device of claim 5, wherein: wire rope stabilizing mean (14) is installed to the top of swing detection device (23), the inside of wire rope stabilizing mean (14) is provided with two rows of longitudinally distributed's stabilizing wheel (28), and wire rope (4) pass through between adjacent stabilizing wheel (28), and wire rope (4) and stabilizing wheel (28) closely laminate.
7. The hoisting machinery safety detection device of claim 6, wherein: first coil spring (15) are all installed to the lower extreme of safety inspection device (9) both sides, the outside of first coil spring (15) has all twined the book and has connected rope (16), connects the below that the one end of rope (16) extended to safety inspection device (9), and connects the one end and lifting hook mounting bracket (5) fixed connection of rope (16).
8. The hoisting machinery safety detection device of claim 7, wherein: the central processing unit (30) and the operation terminal (32) can carry out on-site acousto-optic alarm on the gantry crane main body (1).
9. The hoisting machinery safety detection device of claim 1, wherein: the upper end of the safety detection device (9) is fixed with the frame (3) through bolts.
10. The detection method of the hoisting machinery safety detection device based on claim 8 is characterized in that: the method comprises the following steps:
firstly, after a cargo is lifted by a lifting hook (6), the output of a second servo motor (20) is arranged under the transmission of a belt to enable a clamping wheel (21) to rotate, so that an arc-shaped steel coil (17) extends outwards from the interior of a lifting hook mounting frame (5), a second radar ranging sensor (29) below a mounting head at one end of the arc-shaped steel coil emits a beam to the lifted cargo, after the electromagnetic wave contacts the lifted cargo, part of the electromagnetic wave is reflected, the reflected electromagnetic wave is connected by a receiver to calculate the distance, as an mounting head (18) moves towards one end of the lifted cargo continuously, when distance information breaks cliff, the mounting head (18) is indicated to move to two sides of the cargo, at the moment, the first radar ranging sensor (19) can be used for monitoring the distance between the lifted cargo and a landing leg of a portal crane, and as the distance between the lifted cargo and the landing leg is continuously close, the alarming frequency is increased, the working personnel can clearly know the lifting condition;
step two, when the steel wire rope (4) swings, the steel wire rope (4) can contact the movable block (25), at the moment, the movable block (25) moves towards the inner side to extrude the spring (26), and the spring (26) also can cause pressure to the pressure sensor (24) when contracting, so that according to the elastic coefficient of the spring (26), the whole contracting interval is an early warning interval, when a pressure signal generated in the range is sent to the central processing unit (30), only a conventional early warning is kept for the operation terminal, a control means is not carried out, the swinging amplitude of the steel wire rope (4) is continuously increased, the spring (26) is completely contracted, the ejector pin (27) contacts the pressure sensor (24), the swinging amplitude is shown to exceed a set value, the on-site acousto-optic alarm is rapidly carried out, and workers are informed to carry out processing;
thirdly, forming a given weak electromagnetic field by a magnetic memory planning device (11) fixed at a detection position, magnetizing a ferromagnetic steel wire rope (4) in the magnetic field by the weak electromagnetic field, changing the steel wire rope (4) in the detected area into a detectable state, acquiring magnetic energy potential difference information distributed and memorized in a volume element of the steel wire rope (4) by a weak magnetic detection device (12), combining the winding and unwinding distance of the steel wire rope (4) by a stroke metering device (10) with the acquired information on the surface of the steel wire rope (4), converting and storing the acquired information according to a set mathematical model and a data system by a digital A/D converter, transmitting real-time dynamic data information of the steel wire rope (4) to a central processing unit (30), and generating wire breakage, abrasion, corrosion and fatigue of the steel wire rope (4) due to strength loss;
and step four, if the fatigue value of the steel wire rope (4) exceeds a set range, the image acquisition device (13) can locally record images of the passing steel wire rope (4), collect and send the damage information to the operation terminal (32) and perform on-site acousto-optic alarm on the gantry crane main body (1).
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| CN202210739350.4A CN114955881A (en) | 2022-06-28 | 2022-06-28 | Hoisting machinery safety detection device and detection method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117068952A (en) * | 2023-10-18 | 2023-11-17 | 诺尔起重机有限公司 | Anti-swing protection device of KBK crane |
| CN117169326A (en) * | 2023-11-02 | 2023-12-05 | 国网甘肃省电力公司电力科学研究院 | Robot for detecting quality of steel core inside ultra-high voltage line voltage jointing clamp and application method |
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- 2022-06-28 CN CN202210739350.4A patent/CN114955881A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117068952A (en) * | 2023-10-18 | 2023-11-17 | 诺尔起重机有限公司 | Anti-swing protection device of KBK crane |
| CN117068952B (en) * | 2023-10-18 | 2024-01-09 | 诺尔起重机有限公司 | Anti-swing protection device of KBK crane |
| CN117169326A (en) * | 2023-11-02 | 2023-12-05 | 国网甘肃省电力公司电力科学研究院 | Robot for detecting quality of steel core inside ultra-high voltage line voltage jointing clamp and application method |
| CN117169326B (en) * | 2023-11-02 | 2024-01-02 | 国网甘肃省电力公司电力科学研究院 | Robot for detecting quality of steel core inside ultra-high voltage line voltage jointing clamp and application method |
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