CN2167078Y - Device for limitting excess load and preventing rope from being in non-order - Google Patents

Abstract

The utility model discloses a device for limiting excess load and preventing ropes from being in non order, which is composed of a pull rod, blocks, a connecting rod, impact rods, springs, travel switches, etc., the utility model is used for the apparatus dragged by a winding engine or an electric hoist. The utility model is characterized in that the control circuit of the control apparatus is controlled by the actions of the travel switches caused by the rigidity coefficient of the springs and by that the springs are loosen after compressed. Then the apparatus is in operation, the load can be automatically limited, the ropes are prevented from being in non order, the alarm function can be realized automatically, and the loading weight can be automatically weighed. The utility model has the advantages of compact structure, strong versatility, and high reliability. The utility model can be arranged on the apparatus to be used, and the apparatus does not need reforming; the utility model is an ideal device for limiting excess load and preventing the ropes from being in non order.

Description

Device for limitting excess load and preventing rope from being in non-order

The utility model relates to a kind of device for limitting excess load and preventing rope from being in non-order of making the equipment of traction with winch or electric block.

Existingly make the equipment of traction,, often make towing machine damage, wire rope breaking or other accident occurs because of overflow or steel rope disorder cable as the Cargo Lift in warehouse, the elevator that the building ground is used etc. with electric block or winch.And these equipment are when work: it is overweight to hang hurdle dress thing; can cause overload; hang the hurdle and block when goods or foreign matter make in derrick; also can cause overload; disorder cable as for steel rope; mainly being the reel backward rotation when steel rope does not have traction, steel rope is lax caused, and device start makes and hangs the hurdle and hang thing and drop to the subsurface stop or hang aloft to lie on the table when the hurdle descends to block to fail in time to close to shut down etc. and all can cause the steel wire disorder cable.

And on the Cargo Lift addressed, gig etc., though use very wide in China various places, but these equipment mainly are the mechanical repair plant or the manufacturing of amateur unit of some units, most of overloading free restraint devices, though individual other also is provided with complicated or the restraint device that simply overloads, but the complex structure that has, cost an arm and a leg, though the simple structure that has, but its device or auxiliary device design imperfection, goods is to hanging the impulsive force on hurdle when the force of inertia of device start glancing impact or dress thing, and it is malfunctioning that this device is damaged, and all do not form general-duty, easy-to-install, the stand-alone product that adapts to plurality of devices and indoor and outdoor surroundings.As for the restriction to steel rope disorder cable under the above-mentioned operating mode, for the equipment of doing traction with winch, at home and abroad not seeing as yet at present has its device; For electric block; the individual layer steel rope though only reel on its reel; and car has the guiding grooving; rope guide and cutoff limit switch also are housed on it; when as the towing machine of Cargo Lift or miscellaneous equipment; though run to effect that the top bottom can rely on rope guide and cutoff switch and make on the reel not disorder cable of steel rope hanging the hurdle; but above-mentioned being stuck when hanging hurdle decline is held on the derrick; especially when being stuck in derrick top equipment when failing in time to shut down; on the one hand its steel rope moves and makes the guide pulley device damage because of no traction can't drive rope guide; even the disconnected steel rope of card; on the other hand, suspension hook disengaging easily hangs the hurdle, makes and hangs the hurdle from falling in the air.

The purpose of this utility model is to provide a kind of failure-free, general-duty, economical, durable, that can independently form a kind of product, easy-to-install, be adapted to indoor and outdoor surroundings, can limit the device for limitting excess load and preventing rope from being in non-order of making the equipment of traction with winch or electric block simultaneously.

Technical solution:

The utlity model has: pull bar 1, loading spring 2.4, spring perch 3.5, intermediate mass 6, last piece 7, following piece 8, pitman 9, pull-rod nut 10, lance 11.12, lance spring 13.14, travel switch 15.16, travel switch seat 17.18, axle Xiao 19, protective cover 20, rubber pad 21, waterproof case 22, pitman nut 29, lance setting nut 23, bolt of rear end plate 24.26.27.28, waterproof case guide rod 25, steel rope or shackle 30, steel rope 31.

The special character of the utility model part is: the pull bar 1. that has has for the upper end and is shaped on the disk, the middle part that connect waterproof case on the through hole, upper step of reeve is that smooth section, lower end are threaded stepped appearance car system steel round bar.7. times pieces of the last piece that has 8. are the steel rectangular plate, the intermediate mass 6. that has is the steel square plate, be drilled with at the center of last piece 7. and be drilled with one on the long edge to the midline for the through hole of running-fit, rectangle with pull bar 1. and be the through hole of running-fit with lance 11., the distance at edge hole and plate center is determined by the rigging position of the stroke contact of travel switch 15., is drilled with the through hole that matches with pull bar 1. threaded portions at intermediate mass 6. centers.Following piece 8. centers are shaped on the axle Xiao seat that connects steel rope, the long limit of rectangle center line edge be drilled with one with lance 12.Be the through hole of running-fit, the distance at edge hole and plate center is determined by the rigging position of the stroke contact of travel switch 16..At 7. times pieces of last piece, 8. intermediate mass 6.On all be drilled with four through holes that cooperate with pitman 9. of the axis symmetric arrangement identical with the place circular diameter, four through holes and the pitman 9. of intermediate mass 6. are running-fit.The pitman 9. that has is that of four car systems has threaded steel round bar of hexagonal step.The loading spring 2.4 that has.Be respectively the compression spring of different rigidity coefficient, spring 4.Modulus of rigidity determine by equipment limit for tonnage hoisting capacity.The modulus of rigidity of spring 2. is determined by the equipment minimum stretching force that steel rope should not have during disorder cable, the spring perch 3,5 that has, be cast iron car product, its radial dimension can keep the position of spring 2.4., the upper height size of spring perch 3. can keep spring 2. to be no more than maximum compressibility, spring perch 3, lower height and spring perch 5.The addition height can keep spring 4, be no more than maximum compressibility.The travel switch seat 17 that has, for the T type, 18, be that the crooked end end of an end is gone up the place slightly and is shaped on flange and has certain width to be drilled with the steel plate of mounting hole.The travel switch 15,16 that has is L * 19-001 type, and two groups of contacts of normally-open normally-close are respectively arranged.The lance 11,12 that has.Be that an end is shaped on than big disk and rams and be shaped on the threaded ladder steel of spring perch step one end car round bar, be shaped on the plane along axis direction, be adhesive with on it according to loading spring 2.4 in the side that screw mandrel one end is arranged.Modulus of rigidity calculates the scale graduation of hoisting capacity.The lance spring that has is the less stage clip of modulus of rigidity.The protective cover 20 that has, be two the band flangings, two do not make with the thick 1.9 millimeters steel plate of flanging.Its top of the waterproof case that has is rectangular steel plates or the plastic part greater than whole device contour dimension with certain rigidity band flanging, its underpart is that the soft waterproof fibre or the nylon cloth of two ends band rectangular plastic skeleton made, cloth sticks with glue in skeleton, and the flanging at an end skeleton and top joins together with bolt.The guide rod 25 that has.Be flat steel rod member or plastic part.The bolt and nut that being used to of having assembled connection is the national standard part.

The special character of the utility model structure is: after the utility model assembling; The smooth section of pull bar 1. is installed with piece 7, loading spring 2, spring perch 3, loading spring 4, spring perch 5, intermediate mass 6 successively, pull-rod nut 10 is housed.(go up piece 7, spring perch 3, can on pull bar 1, smooth section, slide).Four pitmans 9, penetrate in the through hole of piece 7, intermediate mass 6, four symmetric arrangement after again with pitman nut 29, be associated with down piece 8, (the tetrad extension bar can be simultaneously slides in the hole of intermediate mass 6, four symmetric arrangement).On following piece 8. axis Xiao seats Xiao 19 is housed.Lance 11,12, (lance 11,12, can slide in its assembly opening respectively) are housed respectively in the through hole of last piece 7, left hand edge and following piece 8, right hand edge.Lance 11, the lance head and last piece between, lance 12, the lance head and following piece 8, between the spring 14,13 that penetrates lance is housed respectively.Lance 11, pass piece 7, top and lance 12, pass down piece 8, the part of bottom, be equipped with respectively and regulate captive nut 23.Intermediate mass 6, left end face in the middle of, with bolt travel switch seat 18 is arranged.Intermediate mass 6, right side central with bolt travel switch seat 17 is arranged.Travel switch seat 18, the middle part with bolt stroke contact travel switch 15 is up arranged, and fixing back travel switch 15, the stroke limit slightly the end in travel switch seat 18, the turn of bilge end face; Travel switch seat 17, the middle part with bolt stroke contact travel switch 16 is down arranged, and fixing back travel switch 16, the up stroke limit slightly the end in travel switch seat 17, T portion end face.Last piece 7, with following piece 8, four limit end faces on bolt protective cover 20 is arranged.There is waterproof case guide rod 25 on surface, place, four limits, protective cover bottom with bolt.On the disk of pull bar 1, upper end, add rubber pad and waterproof case 22 is arranged with bolt.

After the utility model assembling; The pull-rod nut 10 that has, pull bar 1, go up piece 7, loading spring 2,4, spring perch 3,5, intermediate plate 6, formed one, the pitman 9 that has, last piece 7, lower plate 8, formed another body.When pull bar 1, with axle Xiao 19, go up with the recipient to opposite pulling force or be subjected to loading spring 2,4, elastic force the time, by last piece 7, pitman 9, down piece 8, the physical efficiency edge of forming and can only along pull bar 1, smooth section and the hole wall of the through hole of intermediate mass 6, four symmetric arrangement slide up and down.For the equipment of doing traction with winch or electric block, traction is by cable for transferring, make it to be fixed on equipment rack or the towing machine body as in pull bar 1, upper end hole, penetrating steel rope or shackle, be loaded on following piece 8, axle Xiao 19, the tail end that the first line of a couplet connects traction steel-cable, this moment, the towing machine pull of steel wire was all passed through the utility model.When steel rope to axle Xiao 19, pulling force make piece 7, pitman 9, piece 8, the one formed drop to certain position down, be contained in down piece 8, on lance 12, be contained in down piece 7, lance 13, respectively with travel switch 16,15, all kept certain distance, promptly at this moment to travel switch 16,15.All there is not control; When steel rope to axle Xiao 19, pulling force very ambassador go up piece 7, pitman 9, when the downward displacement of piece 8, the one formed is very big down, be contained in piece 7, lance 11, the lance head can accurately press to travel switch 15, the stroke contact, make travel switch 15, normally closed contact disconnect the open contact closure; When steel rope to axle Xiao 19, pulling force less or when not having pulling force, by last piece 7, pitman 9, down piece 8, form one, can be subjected to loading spring 2,4, the elastic force effect and rise, be contained in down piece 8, lance 12, can accurately press to travel switch 16, the stroke contact make travel switch 16, normally closed contact disconnect the open contact closure.

For the equipment of doing traction with winch or electric block, its electric control system generally has the contactless switch QC that control convenience starts power supply, control convenience just changes the contactless switch ZC of (rise and open), the contactless switch NC of control convenience counter-rotating (decline), on these equipment, install the utility model additional, also can near the structure on the equipment or the equipment, install sound equipment and light-operated literal device additional and show overload and disorder cable, as travel switch 15, normally closed contact seal in the control loop of the contactless coil of device start power supply, open contact seals in the control sound equipment and shows the control circuit that overloads with light-operated literal.Travel switch 16, normally closed contact seal in the control loop that the contactless coil of device control counter-rotating (declines) is formed, open contact seals in the control loop of control sound equipment and light-operated literal demonstration disorder cable.The travel switch 15 that has when normally closed contact disconnects, starts the power-supply controller of electric coil blackout, can make the startup electric power disconnection, and the open contact closure can make overload alarm work.The travel switch 16 that has, when normally closed contact disconnects, the contactless coil outage that control descends, the electric power disconnection that control is descended, can make the disorderly rope alarm read out instrument work of carrying at the open contact closure.

Have be loaded on piece 7, lance 11, nut 23, spring 14, the control apparatus of forming, can be according to loading spring 2,4, modulus of rigidity regulate accurately lance 11, the lance head and the distance of travel switch 15, stroke contact, when determining that maximum limit for tonnage hoisting capacity appears in equipment, lance 11, the lance head can rush open travel switch 15, connect electric contact.

The control apparatus of the lance 12 of piece 8, nut 23, spring 13, composition under being loaded on that has; can according to loading spring 2, modulus of rigidity regulate accurately lance 12, lance head and travel switch 16; the distance of stroke contact, lance 12 when determining when the equipment steel rope minimum stretching force occurs and is about to disorder cable occur, can in time shut down, the lance head can rush open travel switch 16, connect electric contact.

The lance 11,12 that has, can in mounting hole separately, slide respectively, make lance 12 when force of inertia or impulsive force occurring, the lance head rise or lance 11, the distance that descends of lance head surpass to travel switch 15,16, the stroke pole location time, travel switch seat 18, bend up part or travel switch seat 17, T shape part to the drag energy of lance head lance is drawn back to allow along the hole wall of mounting hole separately, travel switch is not damaged, can makes that lance is unlikely to be hit bending deformation.

The protective cover 20 that has can prevent that the dust foreign matter from entering in this device, and single chip architecture can make to adjust when checking and install and remove easily.

The waterproof case 22 that has, add rubber pad 21, with bolt on the disk of pull bar 1, upper end, can make that the utility model is anti-when outdoor mounted is used to be stopped that rainwater enters the utility model and only need waterproof cloth is rolled up in placing this cover top with the bottom skeleton when adjusting, needn't pull down this cover.

The waterproof case guide rod 25 that has, the utility model movable part unlikely waterproof case that catches on or cling that rises that descends in the time of making this carry out novel outdoor mounted and be subjected to wind-force, rain power.

Description of drawings and install and use example

Accompanying drawing 1, being front view of the present utility model, accompanying drawing 2, is top plan view of the present utility model, accompanying drawing 3, is travel switch 15,16, the access device control that the utlity model has schematic diagram in electric.

The utlity model has rational in infrastructure, reliable operation, many characteristics such as function is more, commonality good, comformability is strong, install and use on equipment as for it, more unique its advantage of the utility model: it can not only limit the disorder cable fender guard as the overload of the equipment of doing traction with winch or electric block, also can be as the top inhibiting device; He not only can vertically hang, and is adapted to the vertical transport equipment with rope traction, also can horizontal tilt place, and is applicable to that steel rope makes the equipment of level or inclination traction.Tool need not carry out any transformation to original equipment when installing.

Make the equipment of traction with winch or electric block, its kind is more, to gig or the Cargo Lift that is used for vertical transport, generally by derrick, upper frame, pulley, hang the hurdle, traction equipment is formed.It hangs the hurdle and is mounted on guide wheel on it under the effect of the traction of steel rope or deadweight about the track of derrick.To making the equipment of traction with winch, the tail end of the hoist rope of drawing from the ground lifting drum generally needs to walk around the movable pulley that has suspension hook or hang the hurdle again by ground-surface deflection sheave and the deflection sheave that is fixed in the derrick top and is fixed in the top frame.To make the equipment such as Cargo Lift of traction with electric block, its cucurbit generally is suspended in crown, and steel rope lays out from reel, walks around suspension hook or hangs the movable pulley on hurdle, is fixed on the cucurbit casing again.The utility model is installed, only need the pull bar 1 that the utlity model has, penetrate steel rope or shackle in the through hole of upper end, the equipment that winch is made all classes of gig of traction suspends and is fixed in top frame steel rope tail end bearing, the hoist ceiling crane that is opposite to the top suspends and is fixed in cucurbit casing steel rope tail end bearing, again its former steel rope tail end that is fixed on frame or the casing is fixed in following 8 that the utlity model has, axle Xiao 19 at center, on, the minimum stretching force that should not have during disorder cable by equipment limit for tonnage hoisting capacity and steel rope regulates lance 11, with travel switch 15, lance 12, distance with travel switch 16, press accompanying drawing 3, with travel switch access device control path, can normal running equipment.

In the operation: as can be known by the aforementioned structure characteristics, be unkitted thing or dress thing when not overloading when hanging the hurdle, hang the hurdle, suspension hook, goods, the deadweight of hoist rope makes the last piece 7 that the utlity model has to axle Xiao's pulling force, pitman 9, following piece 8, the one of forming has moved down a segment distance, make and be loaded on pull bar 1, on spring 2,4, big and less compression are arranged respectively, last piece 7, pitman 9, following piece 8, integral body move down and make lance 11,12, respectively with travel switch 15,16, certain interval has all been arranged, lance 11,12, to travel switch 15,16, all there is not control, the equipment decline that can hoist, normal operation, make and hang hurdle and derrick and block when causing overflow when hanging thing overload of hurdle dress or goods and foreign matter, hoist rope will increase axle Xiao 19, pulling force, make and be loaded on pull bar 1, on spring 2,4, bigger amount of compression is all arranged, last piece 7, pitman 9, following piece 8, the one of forming all has moving down of big distance, be contained in piece 7, on lance 11, can press to travel switch 15, make travel switch 15, normally closed contact disconnects, the open contact closure.By accompanying drawing 3, the power supply of the coil QC of the startup power contactor of equipment is disconnected as can be known, the device start electric power disconnection, overload alarm device circuit is connected, siren horn will demonstrate signal, at this moment as will not hang hurdle dress thing and alleviate or handle other fault well, press start button in any case, equipment all can not turn round, thereby actv. has been controlled the overload of equipment.

It is the same with overload to install a situation when hanging the rigidity stop that rises the extreme higher position on the hurdle and hanging the hurdle to stop under at crown additional, thereby also actv. has been controlled rushing to summit of equipment.

When equipment counter-rotating is hung that the hurdle drops to the bottom or is stuck in the centre when being held on the derrick; steel rope is to the utility model axle Xiao 19; pulling force can reduce suddenly; piece 7 on it; pitman 9; following piece 8; the one of forming is at spring 2; 4; the elastic force effect can be risen rapidly down; be loaded on down piece 8; on lance 12; press to travel switch 16 rapidly; its normally closed contact is disconnected; the open contact closure; by Fig. 3; as can be known: travel switch 16; normally closed contact disconnect the power supply cut off the contactless switch NC coil that control convenience descends; make the electric power disconnection of supply arrangement counter-rotating; equipment is in time shut down, travel switch 16; the closure of open contact shows the disorderly rope alarm device.The hoist rope that has guaranteed equipment is unlikely lax, thereby has controlled disorder cable effectively.

As because of the normally starting outfit counter-rotating and need start counter-rotating arrangement or more during change steel rope of above-mentioned reason, by accompanying drawing 3, as can be known, as long as pin the bypass start-up control button QA that is parallel on the terminal point of NC coil two ends.

When device start is shut down, dress thing or other reason cause when the force of inertia impulsive force makes the lance head surpass the stroke limit of travel switch, and the protection system of being made up of lance, recoil spring and travel switch seat that has can make travel switch not be subject to any damage.

The spring perch 3,5 that has, can proof load spring 2,4, be not damaged.

As the need weighing equipment hang hurdle dress thing weight also can be on having piece 7, and intermediate mass 6, between fix a variable swept resistance, on the control panel of equipment, install an ohmmeter additional, the kilogram value that the ohmic value of ohmmeter is converted instead or install other digital display device additional, piece 7 utilizations in, and centre 6, the change of relative displacement resistance can weigh more exactly and hang the hurdle and adorn thing weight.

As for to level or be obliquely installed the equipment of traction steel-cable, install the utility model additional, only need folding to remove waterproof case 22 of the present utility model, install the device that the utility model shell is slided on level of the present utility model or the dip plane additional thereon and get final product shelving, principle function is installed for it and vertically suspension is identical.

Claims (3)

1, a kind of device for limitting excess load and preventing rope from being in non-order that drags the equipment of usefulness with winch or electric block: have pull bar 1, loading spring 2.4, spring perch 3.5, intermediate mass 6, pitman 9, travel switch seat 17.18, travel switch 15.16, last piece 7, following piece 8, protective cover 20, lance 11.12, lance spring 13.14, waterproof case 21, axle Xiao 19, pull bar spiral shell nurse 10, pipe link spiral shell nurse 29, lance is regulated spiral shell nurse 23, waterproof case guide rod bolt of rear end plate 24.26,27,28, it is waited to levy and is: the loading spring 2.4. that has is respectively the compression spring of different rigidity coefficient, the modulus of rigidity of spring 2. is determined by the equipment minimum stretching force that steel rope should not have during disorder cable, the modulus of rigidity of spring 4. is determined by equipment limit for tonnage hoisting capacity, loading spring 2.4. is compressed to certain position, lance 11. can make the open contact closure of travel switch 15, normally closed contact disconnects, be series at the startup power contactor QC coil of the equipment of normally closed contact, will cut off the power supply, the alarm device that is parallel to open contact will be worked, overload with control convenience, after being compressed, loading spring 2.4. is stretched to certain position again, lance 12, the open contact of travel switch 16 is connected, normally closed contact disconnects, being series at the control convenience decline of normally closed contact or the contactless switch NC coil of counter-rotating will cut off the power supply, make steel rope have certain stretching force forever, with the disorder cable of control steel rope; The control apparatus that the lance 11.12. spring 13.14. spiral shell nurse 23. that has is formed, can regulate the limit for tonnage hoisting capacity of distinct device requirement, 17.18. cooperates with the travel switch seat, can be no more than the stroke limit by the control travel switch, and travel switch can not damaged because of impacting or transshipping;

2, device for limitting excess load and preventing rope from being in non-order according to claim 1, it is characterized in that: the pull bar 1 that has, be that a upper end has through hole, be shaped on disk, the threaded stepped appearance steel of middle part smooth lower end car round bar, the last piece 7 that has, following piece 8, be guiding principle matter rectangular plate, intermediate mass 6, be the steel square plate, be drilled with and pull bar 1 at last piece 7 centers, through hole for running-fit, be drilled with on the edge and lance 11, through hole for running-fit, at intermediate mass 6, the center is drilled with and pull bar 1, the through hole that threaded portion matches, at following piece 8, the center is shaped on the axle Xiao seat that connects steel rope, edge is drilled with and lance 12, be the through hole of running-fit, at last piece 7, following piece 8, intermediate mass 6, on all be drilled with the identical symmetric arrangement of axis place circular diameter with pitman 9, the through hole that matches (intermediate mass 6, through hole and pitman 9, be running-fit), the pitman 9 that has is that a headband of four car systems has smooth round bar of threaded steel of six-sided head step, the travel switch seat 17 that has, be the T type, 18, be that the crooked end end of an end is gone up the place slightly and is shaped on flange and has certain width to be drilled with the steel plate of mounting hole, the lance 11 that has, 12, for an end of car system has than ram the threaded ladder steel of end round bar with the spring perch step of big disk;

3, according to the described device for limitting excess load and preventing rope from being in non-order of claim 1, it is characterized in that: after its assembling, the pull bar 1 that has, on be installed with piece 7 successively, loading spring 2, spring perch 3, loading spring 4, spring perch 5, intermediate mass 6, pull bar spiral shell nurse 10 is housed, and four pitmans 9 that have penetrate piece 7, intermediate mass 6, use pitman spiral shell nurse 29 behind the through hole of four symmetric arrangement again, connected time piece 8, at last piece 7, edge and following piece 8, in the through hole at edge, the lance 11 that can slide is housed respectively in assembly opening own, 12, lance 11, the lance head and last piece 7, between, the lance head of lance 12. and following piece 8, between the spring 14,13 of less modulus of rigidity is housed respectively, lance 11. passes the top and the lance 12 of piece 7., the bottom of passing down piece 8. is equipped with respectively and is regulated fixedly spiral shell nurse 23, in the side of the intermediate mass 6 that has on the travel switch seat 17,18. of part device device, the opposite difference control convenience overload of stroke contact direction and the travel switch 15 of disorder cable are housed respectively, 16, travel switch 15, the down stroke limit be lower than the turn of bilge end face of travel switch seat 18 slightly, the down stroke limit of travel switch 16. is lower than travel switch seat 17 slightly, T portion end face.

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