CN210286515U - Double-contracting brake electrical control system of crane hoisting mechanism - Google Patents
Double-contracting brake electrical control system of crane hoisting mechanism Download PDFInfo
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- CN210286515U CN210286515U CN201920781820.7U CN201920781820U CN210286515U CN 210286515 U CN210286515 U CN 210286515U CN 201920781820 U CN201920781820 U CN 201920781820U CN 210286515 U CN210286515 U CN 210286515U
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- type brake
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- hoisting mechanism
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Abstract
A double-contracting brake electrical control system of a crane hoisting mechanism comprises an electrical logic control module, a power-off delay time relay, a first contracting brake contactor, a second contracting brake contactor, a first contracting brake and a second contracting brake; the output end of the electric logic control module is connected with the first band-type brake contactor; a group of normally open contacts of the first band-type brake contactor are connected with the first band-type brake; the other group of normally open contacts of the first band-type brake contactor is connected with a power-off delay time relay; the power-off delay time relay is connected with a second band-type brake contactor, and a group of normally open contacts of the second band-type brake contactor are connected with a second band-type brake; the utility model discloses utilize two sets of band-type brakes to realize duplicate protection to hoisting mechanism, greatly increased the fail safe nature of equipment, simple structure, stable performance, fault rate are low.
Description
Technical Field
The utility model belongs to the technical field of crane control technique and specifically relates to a two contracting brake electrical control system of hoist hoisting mechanism has been related to.
Background
The hoisting mechanism is the most important actuating mechanism of the crane and is also the mechanism with the highest requirement on safety and reliability. In the prior art, manufacturers improve the reliability of a hoisting mechanism by arranging two band-type brake contactors on the hoisting mechanism. Through retrieval, the patent with the Chinese patent authorization number of CN201320090171.9 discloses a double-contracting brake control system, which effectively prevents the contracting brake from being released due to misoperation of contactors through two contactors, or one contactor can normally control the opening and closing of the contracting brake when one contactor is bonded, so that the occurrence of accidents can be effectively reduced. However, the above-mentioned double-contracting brake control system can only guarantee the normal operation of the contracting brake when the contactor has a fault, if the contracting brake has a fault or is out of action in use, the operating personnel can not find the fault in time, and the accident is easy to be caused.
Manufacturers also set two sets of band-type brakes on the hoisting mechanism to increase the safety factor. However, the two contracting brakes used in the hoisting mechanism are opened and closed simultaneously, as shown in fig. 1. Because one set of band-type brake just can brake the rated load-lifting capacity of hoist, even consequently one set of band-type brake loses effect, operating personnel also can't the perception, and two band-type brakes are the same virtual in reality, have only played single band-type brake effect, have not brought the improvement of security performance.
SUMMERY OF THE UTILITY MODEL
In order to overcome not enough among the background art, the utility model discloses a two band-type brake electrical control systems of hoist hoisting mechanism has realized the timesharing braking of two sets of band-type brakes, greatly increased hoisting mechanism's fail safe nature.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a two contracting brake electrical control system of hoist hoisting mechanism which characterized by: the device comprises an electrical logic control module, a power-off delay time relay, a first band-type brake contactor, a second band-type brake contactor, a first band-type brake and a second band-type brake; the output end of the electric logic control module is connected with the first band-type brake contactor; a group of normally open contacts of the first band-type brake contactor are connected with the first band-type brake; the other group of normally open contacts of the first band-type brake contactor is connected with a power-off delay time relay; the power-off delay time relay is connected with the second band-type brake contactor, and a group of normally open contacts of the second band-type brake contactor are connected with the second band-type brake.
Preferably, the first band-type brake realizes the braking of the high-speed shaft of the crane hoisting mechanism, and the second band-type brake realizes the braking of the low-speed shaft of the crane hoisting mechanism.
Preferably, the power-off delay time relay has adjustable delay time, and the adjustment value is 0.2-0.5 s.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has: by adopting two sets of band-type brakes, the double protection is realized on the hoisting mechanism, and the safety and reliability of the equipment are greatly improved; by realizing the time-sharing braking of the two sets of band brakes, once the lifting winding drum slips, the lifting mechanism cannot stall immediately, and an operator can timely remove obstacles; the two sets of band-type brakes respectively realize dynamic load braking and static load braking, have different abrasion probabilities, and improve the pertinence of equipment maintenance.
The utility model discloses, simple structure, stable performance, fault rate are low, the protection mode safety, maintenance efficiency are high, can effectively improve hoist hoisting mechanism's fail safe nature.
Drawings
FIG. 1 is a schematic structural diagram of a traditional control system of a double-band brake of a hoisting mechanism of a crane;
fig. 2 is a schematic structural view of the electrical control system of the present invention;
fig. 3 is the schematic view of the installation position of the double-contracting brake of the present invention.
In the figure: 1. an electrical logic control module; 2. a power-off delay time relay; 3. a first band-type brake contactor; 4. a second band-type brake contactor; 5. a first band-type brake; 6. and a second band-type brake.
Detailed Description
The present invention can be explained in detail by the following embodiments, and the object of the present invention is to protect all technical improvements within the scope of the present invention, and the present invention is not limited to the following embodiments.
The utility model discloses shown in fig. 2 is the system architecture schematic diagram, the utility model discloses control system includes electric logic control module 1, outage time delay relay 2, first band-type brake contactor 3, second band-type brake contactor 4, first band-type brake 5 and second band-type brake 6.
The output end of the electric logic control module 1 is connected with the first band-type brake contactor 3. The electric logic control module 1 is used for outputting a control electric signal for the internal contracting brake.
And a group of normally open contacts of the first band-type brake contactor 3 are connected with the first band-type brake 5. After the first band-type brake contactor 3 receives the electric signal of the electric logic control module 1, the normally open contact of the first band-type brake contactor is used for controlling the first band-type brake 5 to loosen and tighten.
The other group of normally open contacts of the first band-type brake contactor 3 is connected with the power-off delay time relay 2; the power-off delay time relay 2 is connected with the second band-type brake contactor 4, and a group of normally open contacts of the second band-type brake contactor 4 is connected with the second band-type brake 6. After the first band-type brake contactor 3 receives the electric signal of the electric logic control module 1, the state of the second band-type brake contactor 4 is controlled by utilizing the other group of normally open contacts through the power-off delay time relay 2, and then the second band-type brake 6 is controlled to be loosened and tightly held. The power-off delay time relay 2 has the functions of obtaining the rapid action of the electric signal and losing the delay action of the electric signal; therefore, when the electric logic control module 1 outputs an electric signal, the first internal contracting brake 5 and the second internal contracting brake 6 are simultaneously released, when the electric logic control module 1 outputs a power-off signal, the second internal contracting brake 6 carries out delayed braking compared with the first internal contracting brake 5, the delay time is the power-off delay time set by the power-off delay time relay 2, and the value of the delay time can be set between 0.2 s and 0.5 s.
As shown in fig. 3, the utility model discloses two band-type brakes mounted position schematic diagrams, first band-type brake 5 realizes the braking to hoist hoisting mechanism high-speed axle, second band-type brake 6 realizes the braking to hoist hoisting mechanism low-speed axle. In the traditional scheme, the double band-type brakes brake dynamic loads at the same time, the abrasion probability of the two band-type brakes is the same, and the condition that the one band-type brake is damaged firstly cannot be statistically analyzed. The utility model divides two sets of band-type brakes into two paths and performs time-sharing braking, the first band-type brake 5 firstly brakes and brakes the high-speed shaft, and the braking property is braking dynamic load; the second band-type brake 6 brakes and brakes the low-speed shaft in a delayed manner, and the braking property is static braking load; the damage probability and the service life of the first band-type brake 5 are easily analyzed from the physical material science to be larger than those of the second band-type brake 6, and the band-type brake mechanism can be inspected and replaced in a targeted manner when daily maintenance and overhaul are carried out.
Implement the system time, divide two kinds of condition:
firstly, a crane hoisting mechanism starts to operate: the lifting motor acts; the electric logic control module 1 outputs an electric signal, a main control coil of the first band-type brake contactor 3 passes through current, and the first band-type brake contactor 3 is closed with a normally open contact connected with the first band-type brake 5 and the power-off delay time relay 2; the power-off delay time relay 2 transmits an electric signal to the second band-type brake contactor 4, and a group of normally open contacts connected with the second band-type brake contactor 4 and the second band-type brake 6 are closed; the first band-type brake 5 and the second band-type brake 6 receive the electric signals and are released simultaneously; the high-speed shaft and the low-speed shaft of the hoisting mechanism run simultaneously.
Secondly, stopping the operation of a crane hoisting mechanism: when the lifting motor stops, the electric logic control module 1 outputs a power-off signal, a main control coil of the first band-type brake contactor 3 loses power, and normally open contacts connected with the first band-type brake 5 and the power-off delay time relay 2 of the first band-type brake contactor 3 are opened simultaneously; the first band-type brake 5 and the power-off delay time relay 2 are powered off, and the first band-type brake 5 embraces the high-speed shaft of the lifting mechanism; after the delay time is reached, the power-off delay time relay 2 releases the second internal contracting brake contactor 4; the main control coil of the second band-type brake contactor 4 is powered off, the normally open contact of the second band-type brake contactor 4 connected with the second band-type brake 6 is opened, and the low-speed shaft of the hoisting mechanism is embraced after the second band-type brake 6 is powered off.
The utility model discloses in, if first band-type brake 5 damages, it has smooth phenomenon to play to rise the reel, but second band-type brake 6 can delay and embrace and rise the reel, is unlikely to arouse hoisting mechanism stall immediately and causes the accident. Once the hoisting drum slips, an operator can find the slipping phenomenon immediately, and can timely remove obstacles or replace the slipping phenomenon, so that the safety and reliability of the equipment are greatly improved.
The part of the utility model not detailed is prior art.
Claims (3)
1. The utility model provides a two contracting brake electrical control system of hoist hoisting mechanism which characterized by: the device comprises an electric logic control module (1), a power-off delay time relay (2), a first band-type brake contactor (3), a second band-type brake contactor (4), a first band-type brake (5) and a second band-type brake (6); the output end of the electric logic control module (1) is connected with the first band-type brake contactor (3); a group of normally open contacts of the first band-type brake contactor (3) is connected with the first band-type brake (5); the other group of normally open contacts of the first band-type brake contactor (3) is connected with the power-off delay time relay (2); the power-off delay time relay (2) is connected with the second band-type brake contactor (4), and a group of normally open contacts of the second band-type brake contactor (4) is connected with the second band-type brake (6).
2. A double-contracting brake electrical control system of a crane hoisting mechanism as claimed in claim 1, wherein: the first band-type brake (5) realizes braking of the high-speed shaft of the crane hoisting mechanism, and the second band-type brake (6) realizes braking of the low-speed shaft of the crane hoisting mechanism.
3. A double-contracting brake electrical control system of a crane hoisting mechanism as claimed in claim 1, wherein: the power-off delay time relay (2) can adjust the delay time, and the adjustment value is 0.2-0.5 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920781820.7U CN210286515U (en) | 2019-05-28 | 2019-05-28 | Double-contracting brake electrical control system of crane hoisting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920781820.7U CN210286515U (en) | 2019-05-28 | 2019-05-28 | Double-contracting brake electrical control system of crane hoisting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210286515U true CN210286515U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920781820.7U Active CN210286515U (en) | 2019-05-28 | 2019-05-28 | Double-contracting brake electrical control system of crane hoisting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210286515U (en) |
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2019
- 2019-05-28 CN CN201920781820.7U patent/CN210286515U/en active Active
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