CN201501756U - Hoisting mechanism limiter for overhead travelling crane - Google Patents
Hoisting mechanism limiter for overhead travelling crane Download PDFInfo
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- CN201501756U CN201501756U CN2009200993894U CN200920099389U CN201501756U CN 201501756 U CN201501756 U CN 201501756U CN 2009200993894 U CN2009200993894 U CN 2009200993894U CN 200920099389 U CN200920099389 U CN 200920099389U CN 201501756 U CN201501756 U CN 201501756U
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- limit switch
- switch
- spring
- push rod
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Abstract
The utility model relates to a hoisting mechanism limiter for an overhead travelling crane, which further reduces and eliminates the overwinding accidents of hooks, provides reliable safety assurance for the safety production of the crane industry, and can be used in metallurgy, chemical industry, machinery manufacturing and other fields that cranes are matched to produce. The hoisting mechanism limiter comprises a control circuit and a mechanical structure, wherein the control circuit comprises a first limit switch, a second limit switch and a contactor, and the first limit switch, the second limit switch and the coil of the contactor are connected between the A phase and the C phase of a three-phase circuit in series; the main contact of the contactor is connected with the movable end of a power supply switch of a hoisting hook take-off and landing circuit of the overhead travelling crane in series, and a hook balance beam is propped against a cross beam to acts with a push rod connected with the cross beam; and a middle-position spring and a lower-position spring are compressed, and an upper-spring extends. Since the push rod is connected with the contact of the limit switch by an elastic steel wire, the contact acts to cut off the power supply of the coil of the contactor, so that the motor of the hoisting hook take-off and landing circuit of the overhead travelling crane stops running.
Description
One, affiliated technical field
The utility model relates to a kind of overhead traveling crane lifting mechanism inhibiting device.
Two, background technology
Crane in bridge type belongs to multiple faults, the equipment of eventful event, because the limitation of special equipment, in a single day paroxysmal electrical accident takes place in the safe limiting device of former car design-calculated one cover, control loop, power circuit et out of order or limiting device self mechanism's et out of order, this cover lifting mechanism limiting device will be malfunctioning, at this moment is easy to take place the gib head overwind trouble.
Current enterprises that has or supervisory management zone are for improving the reliability of safety, for jacking system has increased a limiting device again, its method is to be connected in series a switch in the circuit of a switch of former car design-calculated again, do like this and can only make when the et out of order of former switch own, in a single day electrical accident takes place in this switch competence exertion effect that the back increases, or contactless switch generation mechanical breakdown, and during the contactless switch adhesion, the switch that serial connection is many can not work.
Three, summary of the invention
Further reduce and stop the gib head overwind trouble, for the safety in production of hoisting crane industry provides the failure-free safety assurance.Set up the lifting mechanism position limitator, through evidence, it is not only safe and reliable but also make things convenient for installation and maintenance.
Overhead traveling crane lifting mechanism limiting device, it comprises control circuit and physical construction, described control circuit comprises the first limit switch XZXK1, the second limit switch XZXK2 and contactless switch XZXC, the A that the coil of the first limit switch XZXK1, the second limit switch XZXK2 and contactless switch XZXC is connected on three phase circuit mutually and C mutually between, the main contact of contactless switch XZXC is connected in series on the moved end of power switch ZKO of overhead traveling crane suspension hook landing circuit;
Described physical construction comprises two cover actuating mechanisms, two columns 2, pull bar 14, crossbeam 16 and gib head equalizing bar 18, two cover actuating mechanisms are arranged symmetrically in the both sides of overhead traveling crane suspension hook mechanism, every cover actuating mechanism is by push rod 3, top nut 4, first spring support 5, second spring support 7, the 3rd spring support 9, spring joint 11, last position spring 6, middle position spring 10, upper/lower positions spring 12, upper nut 15 and lower nut 17 are formed, top nut 4 screws the upper end at push rod 3, be installed with first spring support 5 on the push rod 3 of top nut 4 belows successively, last position spring 6, second spring support 7, little car body, the 3rd spring support 9, middle position spring 10, spring joint 11, upper/lower positions spring 12, one end of pull bar 14, upper nut 15 and lower nut 17 are fixed on the lower end of push rod 3 to crossbeam 16, and gib head equalizing bar 18 is horizontally disposed with and fixes with the overhead traveling crane suspension hook; One end of the top of push rod 3 and elastic wire 20 is fixed, the other end of an elastic wire 20 is connected with the contact 1 of the first limit switch XZXK1, the other end of another root elastic wire 20 is connected with the contact 1 of the second limit switch XZXK2, the first limit switch XZXK1 and the second limit switch XZXK2 are separately positioned on the root post 2, and every root post 2 all is fixed on the little car body.
Set up the mechanics of lifting mechanism position limitator: mechanical chain equipment is simple and reliable.
Little car body is set up two elastic push rods, every push rod all is equipped with the spring of two different lengths, but the power that is produced is opposite, has only push rod by jack-up, the antagonistic force of a spring does not overcome the strength that gib head is answered back to, and the application force of another root spring is identical with the application force that gib head is answered back to, and the application force of this root spring is vertical, push rod is unlikely to offset direction by jack-up the time, the spring pressure of normal circumstances car body top wants big, car body below spring has compression slightly, the spring of top is upheld immediately, make push rod upspring to ascent direction rapidly, make newly-increased lifting mechanism limiting device quick action, just can reach desired effects, with a crossbeam two push rod lower ends are connected in one, because the effect of crossbeam, the elastic pressure that the deadweight of push rod and push rod have self, make push rod on little car body, can find balance position automatically, two root posts are set up in dolly body top, two columns are separately fixed at the two ends of two push rods, and two limit switches also are separately fixed on two columns, and two limit switches and two push rods link together with having elastic wire.
Push rod is answered back to by the gib head equalizing bar, make equalizing bar according to the gib head oad and be fixed on the gib head.
Newly-increased lifting mechanism position limitator electric part, push rod is answered back to by the gib head equalizing bar, at this moment a newly-increased limit switch action arbitrarily will make newly-increased contactless coil discharge, cut off the electrical motor main power source simultaneously, when electrical motor is cut off the electricity supply, braking pusher cuts off the power supply thereupon, and electrical motor shuts down.
Contactless for hoisting is because work is frequent, be easy to generate faults such as electric arc trace and cause the contactless switch adhesion, at this moment former car design-calculated one puts the power supply that the ceiling bit switch can't cut off the electrical motor ascent direction, and electrical motor still can rotate to ascent direction, and at this moment moment just overwind trouble might take place.
Because the work of the contactless switch of newly-increased lifting mechanism position limitator does not need frequent starting and stops, main noddle on contactor just can not produce big electric current because of frequent commutation, so just reduced the scaling loss of electric arc to dynamic/static contact, can be so that dynamic/static contact stick together fault, thereby contactless switch part also can normal operation, has reduced the incidence of fault.
Newly-increased limiting device is to connect in the control loop of control panel.
Because lifting mechanism does not have control panel; we are contactless switch of serial connection on protective disc just, if the identical slip of principle is not a towing cable, just newly-increased contactless switch and lashup switch is located on the little car body; but newly-increased 220 volts of voltages of contactless coil, and 380 volts of voltages of main contact.Work as protective disc; after the control panel energising; newly-increased contactless switch will enter mode of operation; for the work of the electrical motor that hoists is got ready. at this moment as long as rise or any contactless switch work that descends; electrical motor will turn round; so long as newly-increased contactless switch discharges; even the rise and fall contactless switch is connected; electrical motor can not move. close could connect and increase the contactless coil power supply newly being located at newly-increased lashup switch on the control panel and at this moment have only. at this moment when gib head drop to increase limit switch newly and reset after; leave behind being located at the newly-increased lashup switch of control panel; just given short circuit newly-increased limit switch because this switch is closed state, made it lose effect. at this moment recovered the normal operation of newly-increased limit switch and newly-increased spacing contactless switch again. above setting is the transformation that used equipment is carried out.
For new installation, can be the lashup switch cancellation that is located on the newly-increased limiting device of control panel, controller adds a normally closed contact on the position that descends and newly-increased limiting device is together in parallel. during normal operation, electrical motor is in the mode of operation of rising, newly-increased spacing contactless coil is by newly-increased limit switch energising, keep the work of newly-increased contactless coil. when being in the state of decline, the normally closed contact circuit parallel guarantees the work of newly-increased caging system contactless coil when descending with newly-increased limit switch and controller. connect motor power, under the situation of forward and reverse contactless switch normal operation, make electrical motor also normally move.
When electrical motor rises, the intrinsic rising caging system of overhead traveling crane et out of order, at this moment gib head has bumped against newly-increased spacing push rod, this just makes newly-increased limit switch action, at this moment newly-increased spacing contactless switch can not be worked, and be in and descend, the state that can not rise. produce the loop by controller normally closed contact and newly-increased contactless coil during decline, make newly-increased spacing contactless switch to descend, can not rise, such design mainly is a handled easily, safety and reliability, prevent newly-increased untimely the pulling down of caging system lashup switch, it is out of control to make newly-increased this overlap safe caging system.Can be applicable to metallurgy, chemical industry, machine manufacture has hoisting crane to cooperate the field that produces.
Four, description of drawings
Fig. 1 is the structural representation of the utility model mechanics, and Fig. 2 is an overhead traveling crane suspension hook landing electrical block diagram, and Fig. 3 is an overhead traveling crane suspension hook landing control circuit structural representation.Fig. 4 is an another kind of overhead traveling crane suspension hook landing control circuit structural representation in the specific embodiment one.
Five, specific embodiments
The specific embodiment one:
Overhead traveling crane lifting mechanism limiting device, it comprises control circuit and physical construction, described control circuit comprises the first limit switch XZXK1, the second limit switch XZXK2 and contactless switch XZXC, the A that the coil of the first limit switch XZXK1, the second limit switch XZXK2 and contactless switch XZXC is connected on three phase circuit mutually and C mutually between, the main contact of contactless switch XZXC is connected in series on the moved end of power switch ZKO of overhead traveling crane suspension hook landing circuit; Described physical construction comprises two cover actuating mechanisms, two columns 2, pull bar 14, crossbeam 16 and gib head equalizing bar 18, two cover actuating mechanisms are arranged symmetrically in the both sides of overhead traveling crane suspension hook mechanism, every cover actuating mechanism is by push rod 3, top nut 4, first spring support 5, second spring support 7, the 3rd spring support 9, spring joint 11, last position spring 6, middle position spring 10, upper/lower positions spring 12, upper nut 15 and lower nut 17 are formed, top nut 4 screws the upper end at push rod 3, be installed with first spring support 5 on the push rod 3 of top nut 4 belows successively, last position spring 6, second spring support 7, little car body, the 3rd spring support 9, middle position spring 10, spring joint 11, upper/lower positions spring 12, one end of pull bar 14, upper nut 15 and lower nut 17 are fixed on the lower end of push rod 3 to crossbeam 16, and gib head equalizing bar 18 is horizontally disposed with and fixes with the overhead traveling crane suspension hook; One end of the top of push rod 3 and elastic wire 20 is fixed, the other end of an elastic wire 20 is connected with the contact 1 of the first limit switch XZXK1, the other end of another root elastic wire 20 is connected with the contact 1 of the second limit switch XZXK2, the first limit switch XZXK1 and the second limit switch XZXK2 are separately positioned on the root post 2, and every root post 2 all is fixed on the little car body.
At first to carry out laying-out to electric system, contactless switch is installed, connect circuit, make two columns, dead work is carried out the back and is cut two holes in the suitable position of little car body, and according to two elastic push rods of pitch-row assembling, elastic push rod puts down two steel wires by two holes, push rod is sling with steel wire, carried out after the push rod installation; Welding two columns. push rod is connected with elastic wire with switch, the limit switch wiring, column has footing to be fixed, and at maintenance compensating shaft drive coupling, can dismantle easy access during reel.Two limit switch footing couple together with a reinforcing bar, have played tension, and two switch wiring simultaneously are fixed on protection circuit on the reinforcing bar.Debugging; all work is all carried out above car body; for rebuilding old equipment; if newly-increased caging system carries out in overhead traveling crane manufacturing enterprise; controller, control panel, a series of auxiliary facility such as protective disc is bound to be shaped more; more being tending towards perfect. manufacturing enterprise implements this scheme, can be than using enterprise to possess more supremacy clause.
Accompanying drawing is the invention overall arrangement scheme drawing, in the accompanying drawing 1:
1 limit switch, newly-increased contactless switch XZXC coil power is cut off in switch motion when push rod upwards lifts.
2 columns mainly are the usefulness of fixing newly-increased limit switch xzxk.
3 elastic push rods, master cock opens and closes.
4 nuts are elastic push rod fixedly, and regulating spring pressure.
5.7.9. spring supports and 11 spring joints, is used for spring is fixed on around the push rod, makes the power of spring generation even.
6. spring generation power upwards on little car body.
8. elastic push rod is fixed at little car body.
10.12 spring is downward generation power on little car body, makes push rod find balance position automatically at little car body.
11. spring joint connects together two springs. easy flexural deformation when a long spring is answered back to, change the direction of power possibly, played cooperatively interacting of spring and push rod simultaneously.
14. pull bar has not only played the effect of fixed adjusting pad, is unlikely to make the diastrophic effect of push rod but also play the preceding two push rods connection of installation.
15.17 fixing two push rods, nut connects crossbeam.
16. connect crossbeam two elastic push rods are connected, when gib head pushes up any position of crossbeam, wherein just have a push rod to upspring, switch will move.
18. the gib head equalizing bar is answered back to elastic push rod, connects crossbeam, realizes desired effects.
In the accompanying drawing 2:
Push rod is answered back to by the gib head equalizing bar, at this moment newly-increased any one action of limit switch XZXK1-2 will make newly-increased contactless switch XZXC coil discharge, cut off electrical motor M main power source simultaneously, braking contactor ZDC cuts off the power supply thereupon, hydraulic braking YZD electrical motor is shut down, contactless for hoisting ZC is because the faults such as frequently being easy to generate the electric arc trace of working causes contactless for hoisting ZC adhesion, at this moment intrinsic one puts the power supply that the ceiling bit switch can't cut off ascent direction, and electrical motor M also can rotate to ascent direction.
Because the work of newly-increased lifting mechanism position limitator contactless switch XZXC does not need frequent starting and stops, contactless switch XZXC master contact head can not produce big electric current because of frequent commutation, so just reduced the scaling loss of electric arc to dynamic/static contact, can be so that dynamic/static contact stick together fault.
In the accompanying drawing 3:
Newly-increased position limitator is to connect in the control loop of control panel.
Because lifting mechanism does not have control panel; just identical in contactless switch XZXC principle of protective disc serial connection; work as protective disc; after the control panel energising; newly-increased contactless switch XZXC will enter mode of operation; ready for operation for the electrical motor M that hoists; at this moment so long as any contactless switch work of rising ZC decline FC; electrical motor will turn round; so long as newly-increased limit switch XZXK1-2 moves one arbitrarily; newly-increased contactless switch XZXC coil will discharge; even rising ZC decline FC contactless switch is connected; electrical motor can not move yet; close and could connect newly-increased contactless switch XZXC coil power being located at newly-increased lashup switch XZJK on the control panel and at this moment have only. at this moment when gib head drop to increase limit switch XZXK1-2 newly and reset after, increase lashup switch XZJK newly and leave behind being located at control panel, because this switch is a closure state; just given short circuit newly-increased limit switch XZXK1-2, made it lose effect.At this moment recovered the normal operation of newly-increased limit switch XZXK1-2 and newly-increased spacing contactless switch XZXC again, more than being provided with is that used equipment is transformed.
In the accompanying drawing 4:
For new installation, can be the lashup switch cancellation on the newly-increased limiting device of control panel, controller is added a normally closed contact XZKC in the position that descends and newly-increased limit switch XZXK1-2 is together in parallel.Newly-increased spacing contactless switch XZXC coil carries out work by newly-increased limit switch XZXK1-2 and the normally closed XZKC energized of controller lowering position.
A, little car body set up two to have elastic push rod (3) and at little car body two different length springs (10,12) (6) push rod is housed up and down and answers back to by gib head equalizing bar (18).
B, gib head equalizing bar (18) answer back to that push rod connects that crossbeam (16) spring (10,12) is compressed that spring (6) upholds immediately that push rod (3) pops up because push rod (3) and switch (1) are connected switch (1) action with elastic wire cuts off and increase contactless switch (xzxc) coil power electrical motor newly and shut down.
C, because lifting mechanism does not have control panel just to be connected in series the identical slip of a contactless switch (xzxc) principle at protective disc is not that towing cable just is located at contactless switch (xzxc) and lashup switch (xzjk) on the little car body.
D is so long as newly-increased contactless switch (xzxc) coil release, (zc) (fc) contactless switch that descends that rises is connected electrical motor (m) and can not be moved and at this moment have only and close and could connect newly-increased contactless switch (xzxc) coil power being located at newly-increased lashup switch (xzjk) on the control panel, has only newly-increased contactless switch (xzxc) work back rising (zc) decline (fc) contactless switch work electrical motor (m) to move.
E, controller add a normally closed contact (xzkc) at lowering position and are together in parallel with newly-increased limiting device switch (xzxk), substitute newly-increased lashup switch (xzjk).
F, normally closed contact (xzkc) circuit parallel guarantees that newly-increased caging system contactless switch (xzxc) coil working connects electrical motor (m) power supply when descending with newly-increased limit switch (xzxk) and controller.
The specific embodiment two:
It also comprises lashup switch XZJK, the first limit switch XZXK1 is adjacent with the second limit switch XZXK2 to connect into one section circuit, and lashup switch XZJK is connected in parallel on the two ends of one section circuit that the first limit switch XZXK1 and the second limit switch XZXK2 connected into.
Claims (2)
1. overhead traveling crane lifting mechanism limiting device, it is characterized in that it comprises control circuit and physical construction, described control circuit comprises first limit switch (XZXK1), second limit switch (XZXK2) and contactless switch (XZXC), the A that the coil of first limit switch (XZXK1), second limit switch (XZXK2) and contactless switch (XZXC) is connected on three phase circuit mutually and C mutually between, the main contact of contactless switch (XZXC) is connected in series on the moved end of power switch (ZKO) of overhead traveling crane suspension hook landing circuit;
Described physical construction comprises two cover actuating mechanisms, two columns (2), pull bar (14), crossbeam (16) and gib head equalizing bar (18), two cover actuating mechanisms are arranged symmetrically in the both sides of overhead traveling crane suspension hook mechanism, every cover actuating mechanism is by push rod (3), top nut (4), first spring support (5), second spring support (7), the 3rd spring support (9), spring joint (11), last position spring (6), middle position spring (10), upper/lower positions spring (12), upper nut (15) and lower nut (17) are formed, top nut (4) screws the upper end in push rod (3), be installed with first spring support (5) successively on the push rod (3) of top nut (4) below, last position spring (6), second spring support (7), little car body, the 3rd spring support (9), middle position spring (10), spring joint (11), upper/lower positions spring (12), one end of pull bar (14), upper nut (15) and lower nut (17) are fixed on the lower end of push rod (3) to crossbeam (16), and gib head equalizing bar (18) is horizontally disposed with and fixes with the overhead traveling crane suspension hook; One end of the top of push rod (3) and elastic wire (20) is fixed, the other end of an elastic wire (20) is connected with the contact (1) of first limit switch (XZXK1), the other end of another root elastic wire (20) is connected with the contact (1) of second limit switch (XZXK2), first limit switch (XZXK1) and second limit switch (XZXK2) are separately positioned on the root post (2), and every root post (2) all is fixed on the little car body.
2. overhead traveling crane lifting mechanism limiting device according to claim 1, it is characterized in that it also comprises lashup switch (XZJK), first limit switch (XZXK1) is adjacent with second limit switch (XZXK2) to connect into one section circuit, and lashup switch (XZJK) is connected in parallel on the two ends of one section circuit that first limit switch (XZXK1) and second limit switch (XZXK2) connected into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200993894U CN201501756U (en) | 2009-03-25 | 2009-03-25 | Hoisting mechanism limiter for overhead travelling crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200993894U CN201501756U (en) | 2009-03-25 | 2009-03-25 | Hoisting mechanism limiter for overhead travelling crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201501756U true CN201501756U (en) | 2010-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200993894U Expired - Fee Related CN201501756U (en) | 2009-03-25 | 2009-03-25 | Hoisting mechanism limiter for overhead travelling crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201501756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891345A (en) * | 2015-04-22 | 2015-09-09 | 李志刚 | Crane ground operation position limitation control apparatus |
-
2009
- 2009-03-25 CN CN2009200993894U patent/CN201501756U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891345A (en) * | 2015-04-22 | 2015-09-09 | 李志刚 | Crane ground operation position limitation control apparatus |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20130325 |