CN214570206U - Limiting device for lifting mechanism of bridge crane - Google Patents
Limiting device for lifting mechanism of bridge crane Download PDFInfo
- Publication number
- CN214570206U CN214570206U CN202120755272.8U CN202120755272U CN214570206U CN 214570206 U CN214570206 U CN 214570206U CN 202120755272 U CN202120755272 U CN 202120755272U CN 214570206 U CN214570206 U CN 214570206U
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- crane
- photoelectric switch
- infrared photoelectric
- lifting
- lifting hook
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Abstract
The utility model discloses a stop device for bridge crane hoisting mechanism in hoisting equipment field, including set up on the crane operation dolly and with the infrared photoelectric switch of the control circuit electric connection of hoist, infrared photoelectric switch's lamp holder is just to the hook group of hoist downwards. The infrared photoelectric switch is used as a limiting device, the distance between the infrared photoelectric switch and the hook group is judged to start an electric contact inside the crane, a lifting control loop of the lifting hook is cut off, the lifting hook is protected to be safely stopped, the lifting is prevented from continuing to rise, and the safety accident caused by the failure of the traditional crane lifting limiting switch can be effectively prevented.
Description
Technical Field
The utility model relates to a hoisting equipment field especially relates to a stop device for bridge crane hoisting mechanism.
Background
In the traditional crane hoisting mechanism, a weight type limit switch is usually adopted to be mounted on a trolley body in order to stop hoisting and protect a lifting hook and a steel rope from accidents of rope breakage and falling, and the steel rope falls and falls to surround a steel wire rope of the hoisting mechanism. When the lifting hook rises to a preset limit height, jacking the weight, rotating the weight, opening an internal contact of the limit switch, disconnecting a lifting loop of the crane and stopping lifting; when the lifting hook returns, the lifting hook can only descend until the falling weight leaves the lifting hook again, and the falling weight is in limit contact with the lifting hook. The whole process is influenced by faults of jamming of the falling weight ring, winding or breaking of the falling weight steel rope, failure of a limit switch heavy hammer, failure of a mechanical contact mechanism and the like, the lifting mechanism is prone to rising limit failure, and reliability is low. Once the crane fails, serious crane accidents of 'lifting hook up and falling to the ground after rope breaking' are possibly caused, and the safe operation and personal safety of the crane are endangered.
SUMMERY OF THE UTILITY MODEL
For overcoming the above-mentioned not enough that current weight formula limit switch exists, the utility model aims to solve the technical problem be: the limiting device for the lifting mechanism of the bridge crane is simpler.
The utility model provides a technical scheme that its technical problem adopted is:
a stop device for bridge crane hoisting mechanism, including setting up on the hoist operation dolly and with the infrared photoelectric switch of hoist control circuit electric connection, infrared photoelectric switch's lamp holder is just right the hook group of hoist downwards.
Further, the crane operation trolley is provided with a mounting bracket, and the infrared photoelectric switch is mounted on the mounting bracket.
Furthermore, the infrared photoelectric switch is connected with a control loop of the crane by a normally closed electric contact.
Furthermore, a reflecting plate is arranged on the hook group, and the plate surface of the reflecting plate is perpendicular to the infrared rays emitted by the infrared photoelectric switch.
The utility model has the advantages that: adopt infrared photoelectric switch as stop device, start the inside electric contact of hoist through the distance of judging infrared photoelectric switch and lifting hook group, cut off the lifting hook and rise the control circuit, protection lifting hook safety is stopped, prevents to continue to rise, can effectively prevent that traditional hoist from rising limit switch and inefficacy and the incident that causes.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Marked in the figure as 1-crane running trolley, 2-infrared photoelectric switch, 3-lifting hook group, 4-mounting support and 5-reflecting plate.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a stop device for bridge crane hoisting mechanism, including setting up on crane operation dolly 1 and with the control circuit electric connection's of hoist infrared photoelectric switch 2, infrared photoelectric switch 2's lamp holder is just to the hook group 3 of hoist downwards. The infrared photoelectric switch 2 is a conventional device, and detects the presence or absence of an object by using the shielding or reflection of a light beam by the object to be detected and gating a circuit by a synchronous circuit. The detection distance of the infrared photoelectric switch is generally 0.5-10m, and the detection distance can be adjusted by some models.
The working process of the application is as follows: firstly, according to the installation position of a crane ascending limit switch, the infrared photoelectric switch 2 is determined to be installed on the limit position of a heavy hammer of a crane trolley body, the infrared ray vertically faces downwards to the hook group 3, and the infrared photoelectric switch 2 is connected with a crane control loop through a normally closed electric contact, so that the crane can be smoothly lifted under most conditions. Only when the lifting hook group 3 rises to be close to the bottom of the trolley body for a set distance, the infrared photoelectric switch 2 detects that the lifting hook group 3 blocks infrared rays, an internal electric contact is started to be disconnected, a lifting control loop of the lifting hook group 3 is cut off, then the lifting of the crane stops, the lifting hook group 3 is protected to be safely stopped, the lifting is prevented from continuing to rise, a steel rope is snapped, and the lifting hook falls down. When the lifting hook descends again, a descending loop is started, and when the lifting hook descends to a position away from the bottom of the trolley body by a set height, the lifting hook recovers safe ascending and descending operation. Therefore, safety accidents caused by the failure of the lifting limit switch of the crane can be effectively prevented.
The following preferred embodiments are also provided:
1. the crane operation trolley 1 is provided with a mounting bracket 4, and the infrared photoelectric switch 2 is mounted on the mounting bracket 4. The installation support 4 is arranged, so that the position of the infrared photoelectric switch 2 can be conveniently fixed and adjusted, and the working stability and the detection precision of the infrared photoelectric switch are ensured.
2. The infrared photoelectric switch 2 is preferably a reflective photoelectric switch. The reflection-type photoelectric switch integrates emission and reception, can adjust sensitivity, and has stable work and wide application range.
3. In order to cooperate with the reflective photoelectric switch, a reflecting plate 5 is preferably disposed on the hook assembly 3, and the plate surface of the reflecting plate 5 is perpendicular to the infrared rays emitted by the infrared photoelectric switch 2. The reflecting plate 5 can improve the effect of receiving the reflected signal by the photoelectric switch, thereby improving the working stability and the detection precision of the equipment.
This application adopts infrared photoelectric switch as stop device, starts the inside electric contact of hoist through the distance of judging infrared photoelectric switch and lifting hook group, cuts off the lifting hook control circuit that rises, and protection lifting hook safety is stopped, prevents to continue to rise, can prevent effectively that traditional hoist from rising limit switch inefficacy and the incident that causes, has fine practicality and application prospect.
Claims (4)
1. A stop device for bridge crane hoisting mechanism, characterized by: the crane control system comprises an infrared photoelectric switch (2) which is arranged on a crane running trolley (1) and electrically connected with a control loop of the crane, wherein a lamp cap of the infrared photoelectric switch (2) downwards faces a hook group (3) of the crane.
2. A spacing device for a hoisting mechanism of a bridge crane as claimed in claim 1, wherein: the crane operation trolley (1) is provided with a mounting bracket (4), and the infrared photoelectric switch (2) is mounted on the mounting bracket (4).
3. A spacing device for a hoisting mechanism of a bridge crane as claimed in claim 1, wherein: the infrared photoelectric switch (2) is connected with a control loop of the crane by a normally closed electric contact.
4. A spacing device for a hoisting mechanism of a bridge crane as claimed in claim 1, wherein: the lifting hook group (3) is provided with a reflecting plate (5), and the surface of the reflecting plate (5) is perpendicular to the infrared rays emitted by the infrared photoelectric switch (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120755272.8U CN214570206U (en) | 2021-04-13 | 2021-04-13 | Limiting device for lifting mechanism of bridge crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120755272.8U CN214570206U (en) | 2021-04-13 | 2021-04-13 | Limiting device for lifting mechanism of bridge crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214570206U true CN214570206U (en) | 2021-11-02 |
Family
ID=78359695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120755272.8U Active CN214570206U (en) | 2021-04-13 | 2021-04-13 | Limiting device for lifting mechanism of bridge crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214570206U (en) |
-
2021
- 2021-04-13 CN CN202120755272.8U patent/CN214570206U/en active Active
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