CN201220770Y - Automatic control device for second brake of double braking electric hoist - Google Patents
Automatic control device for second brake of double braking electric hoist Download PDFInfo
- Publication number
- CN201220770Y CN201220770Y CNU2008200706630U CN200820070663U CN201220770Y CN 201220770 Y CN201220770 Y CN 201220770Y CN U2008200706630 U CNU2008200706630 U CN U2008200706630U CN 200820070663 U CN200820070663 U CN 200820070663U CN 201220770 Y CN201220770 Y CN 201220770Y
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- relay
- brake
- normally
- control device
- automatic control
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Abstract
The utility model discloses an automatic control device for the second brake of a double-brake electric block and relates to a control technology. The utility model aims to provide an automatic control device for the second brake of a double-brake electric block with the function that a weight can descend safely when the second brake is applied. The technical scheme of the utility model is that in the automatic control device of the second brake of the double-brake electric block, a manual button PB7 and the series circuit of a relay MC7 are connected with an AC power source; a manual PB8 normally-closed button, the normally-closed contact of an overspeed switch CSK, and the series circuit of a relay MC8 are connected with the AD power source; the normally-open contact MC8 of the relay MC8 is connected in parallel with the normally-closed contact of the overspeed switch CSK; the normally-closed contact MC7 of the relay MC7, the normally-open contact of another MC8, and the series circuit of a relay MC9 are connected with the AD power source; and the normally-open contact MC9 of a relay MC9 is connected in series on the circuit where a traction electromagnet DCT1 and the AD power source are connected. The utility model is used for cranes.
Description
Technical field:
The utility model relates to a kind of control technology, particularly a kind of automatic control device for second brake of double-braking electric hoist.
Background technology:
Electric block in the hazardous environment work operations, require it to have dual brake, its objective is when having occurred fault in the process of hoisting and during when first brake failure, the reel braking that the second drg work will descend is fast lived, thereby avoid accident to take place, but the weight of this moment is parked in aerial and can not descends, however the control that the controller of existing electric block has only lifting, gets off and advance, retreat, thereby the controller of existing electric block can not satisfy the requirement of this double-brake electric hoist.
Summary of the invention:
The purpose of this utility model provides a kind of second drg can make weight safety decline function after braking automatic control device for second brake of double-braking electric hoist.The technical solution of the utility model is, automatic control device for second brake of double-braking electric hoist, it is characterized in that: the circuit series of hand push button PB7 and relay MC7 is connected with source of AC, the manual normally closed button of PB8, the circuit series of the normally closed contact of overspeed switch CSK and relay MC8 is connected with above-mentioned source of AC, the open contact MC8 of relay MC8 and the normally closed contact of overspeed switch CSK are in parallel, the normally closed contact MC7 of relay MC7, the circuit series of another MC8 open contact and relay MC9 is connected with above-mentioned alternating current circuit, is serially connected with the open contact MC9 of relay MC9 on tractive magnet DCT1 and source of AC bonded assembly circuit.The utility model has the remarkable advantage that after the braking of second drg weight safety is descended compared with the prior art.
Description of drawings:
Accompanying drawing is the electrical schematic diagram of the second drg automatic control device of the utility model double-brake electric hoist.
The specific embodiment:
The utility model is described in further detail in conjunction with above accompanying drawing, can make after the braking of second drg under the weight energy safe falling that hoists in order to solve, when the employing of second drg is drg open in usual, be under the normal circumstances, the brake control lever of second drg is in releasing orientation, fault in hoisting, electric block has taken place, and during first brake failure, when weight descends fast, when drum speed reached 1.25 times of normal speed, it is electric that the overspeed switch closure that is located at the brake wheel place gets magnet coil, and the pulling brake control lever opens the brake wheel locking, reel stops operating, and has avoided the accident generation.Need lower and handle (as molten steel) but be parked in aerial weight, simultaneously breakdown of equipment be repaired.This just requires weight to land safely.The technical scheme of head it off is, the two ends of hand push button PB7 and the circuit series of relay MC8 are connected with source of AC, the circuit series of PB8 button, CSK overspeed switch normally closed contact and MC8 relay is in parallel with foregoing circuit, the open contact MC8 of MC8 relay is in parallel with the normally closed contact of CSK overspeed switch, and overspeed switch CSK is electrically connected with 220V; The circuit series of MC7 normally closed contact, MC8 open contact and relay MC9 is connected with source of AC; The tractive magnet coil is connected with the 380V source of AC, is serially connected with the MC9 open contact on the circuit of tractive magnet and above-mentioned 380V source of AC.
Control principle of the present utility model and method of operation are, electric block is when normal operation, overspeed switch CSK energising, its normally closed electric shock disconnects, relay MC8 dead electricity, its open contact make relay MC9 no power, tractive magnet no power, the brake control lever of second drg is in the brake wheel released state, and promptly second drg is not worked.When the electric block et out of order is badly in need of stopping to descend and first brake failure can not be braked, this moment, reel quickened, when its whereabouts rotating speed reaches 1.25 of normal speeds, and the overspeed switch CSK closing of contact, relay MC8 gets electric and self-insurance, MC8 open contact closure, relay MC9 gets electric, MC9 open contact closure, tractive magnet DCT1 energising, the brake control lever that spurs second drg move the brake wheel locking, the reel stall, thus avoided the accident generation.But weight can not always rest in the air, the one, need keep in repair equipment, and can not in time lower and can solidify for the molten iron in the ladle.In order to realize that weight can drop to safely on the ground, can press button PB7, relay MC7 gets, its normally closed electric shock disconnects, so the MC9 dead electricity, the tractive magnet dead electricity, the brake control lever of second drg separates with the braking road, the weight by gravity, begin the certain altitude that falls, release button PB7, weight stop to descend, through repeatedly pressing button PB7, weight is fallen to the ground safely.At this moment, press reset switch button PB8, cut off makes the MC8 dead electricity, so the tractive magnet dead electricity, second drg is not braked.
Claims (1)
1, automatic control device for second brake of double-braking electric hoist, it is characterized in that: the circuit series of hand push button PB7 and relay MC7 is connected with source of AC, the manual normally closed button of PB8, the circuit series of the normally closed contact of overspeed switch CSK and relay MC8 is connected with above-mentioned source of AC, the open contact MC8 of relay MC8 and the normally closed contact of overspeed switch CSK are in parallel, the normally closed contact MC7 of relay MC7, the circuit series of another MC8 open contact and relay MC9 is connected with above-mentioned alternating current circuit, is serially connected with the open contact MC9 of relay MC9 on tractive magnet DCT1 and source of AC bonded assembly circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200706630U CN201220770Y (en) | 2008-05-19 | 2008-05-19 | Automatic control device for second brake of double braking electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200706630U CN201220770Y (en) | 2008-05-19 | 2008-05-19 | Automatic control device for second brake of double braking electric hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201220770Y true CN201220770Y (en) | 2009-04-15 |
Family
ID=40574284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200706630U Expired - Lifetime CN201220770Y (en) | 2008-05-19 | 2008-05-19 | Automatic control device for second brake of double braking electric hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201220770Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192750A (en) * | 2014-08-27 | 2014-12-10 | 安徽广德昌立制动器有限公司 | Universal type elevator brake voltage-regulating control circuit |
-
2008
- 2008-05-19 CN CNU2008200706630U patent/CN201220770Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192750A (en) * | 2014-08-27 | 2014-12-10 | 安徽广德昌立制动器有限公司 | Universal type elevator brake voltage-regulating control circuit |
| CN104192750B (en) * | 2014-08-27 | 2016-07-06 | 安徽广德昌立制动器有限公司 | Universal elevator brake voltage regulator control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090415 Effective date of abandoning: 20080519 |