Control device for movement of crown block cart
By introducing distance sensors and multi-speed control devices into the Tianche Large Vehicle Movement Control System, the problem that existing systems are difficult to effectively adjust the speed during high-speed cross-operation is solved, and the safe distance between Tianche is maintained and stable operation is achieved.
Patent Information
- Application Number
- CN202420741204.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-04-10
AI Technical Summary
The existing Tianche Large Vehicle Movement Control System is difficult to meet the speed regulation requirements in occasions where the Tianche Cross-operation speed is faster, resulting in Tianche unable to effectively brake emergency, which is easy to cause collision accidents.
A control device is designed, including a controller, a first contactor, a second contactor, a third contactor and a distance sensor. The distance sensor detects the real-time distance between two rooftops and controls the gear position of the motor to ensure a safe distance and prevent collisions.
Through real-time distance detection and motor gear control, collision accidents caused by excessive speed of large vehicles are effectively avoided, and the stable operation of the sky truck is ensured.
Smart Images
Figure CN222846341U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of overhead crane control, and more specifically, to a control device for the movement of an overhead crane. Background Art
[0002] The traditional overhead crane movement is composed of a master controller and a contactor control system, which can meet the speed regulation requirements in general applications. However, in situations where the overhead crane operates at a high speed, relying solely on the contactor system is often unable to meet the requirements. When the overhead crane travels too fast and the operator does not respond in time, the overhead crane cannot take effective emergency braking, which can easily cause an accident where the two overhead cranes collide. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a control device and device for the movement of a crane trolley in view of the deficiencies of the existing technology, so as to solve the technical problem that the existing manual operation mode of moving the crane trolley easily causes the collision of two cranes.
[0004] The utility model discloses a control device for the movement of a crane trolley, which comprises a controller, a first contactor, a second contactor, a third contactor and a distance sensor. The distance sensor is installed on the crane, and the signal input end of the controller is electrically connected to the distance sensor.
[0005] The first gear control terminal of the motor of the overhead crane trolley is electrically connected to the live wire through the normally open contact of the third contactor, the second gear control terminal of the motor of the overhead crane trolley is electrically connected to the live wire through the normally open contact of the second contactor, and the third gear control terminal of the motor of the overhead crane trolley is electrically connected to the live wire through the normally open contact of the first contactor.
[0006] As a further improvement, the controller is connected to the coil of the first contactor through the first normally closed contact of the second contactor and the first normally closed contact of the third contactor which are connected in series.
[0007] Furthermore, the controller is connected to the coil of the second contactor through a first normally closed contact of the first contactor and a second normally closed contact of the third contactor which are connected in series.
[0008] Furthermore, the controller is connected to the coil of the third contactor through the second normally closed contact of the first contactor and the second normally closed contact of the second contactor which are connected in series.
[0009] Furthermore, a fourth-gear switch is provided between the overhead crane trolley motor and the live wire for enabling the overhead crane trolley to move at a fourth-gear speed.
[0010] Beneficial Effects
[0011] The advantages of the utility model are:
[0012] The utility model can trigger different gears of the overhead crane trolley according to the real-time distance between the two overhead cranes through the arrangement of the controller, the first contactor, the second contactor, the third contactor and the distance sensor, thereby ensuring a safe distance between the two overhead cranes, better solving the problem of the overhead crane trolley speed reduction, and preventing the collision of the two overhead cranes due to the excessive speed of the trolley to the greatest extent, which is conducive to maintaining the stability of the overhead crane operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the main circuit of the utility model;
[0014] Figure 2 It is a schematic diagram of the control circuit of the utility model.
[0015] Among them: U1-controller, KA1-first contactor, KA2-second contactor, KA3-third contactor, KA1_1-normally open contact of the first contactor, KA2_1-normally open contact of the second contactor, KA3_1-normally open contact of the third contactor, KA1_2-first normally closed contact of the first contactor, KA2_2-first normally closed contact of the second contactor, KA3_2-first normally closed contact of the third contactor, KA1_3-second normally closed contact of the first contactor, KA2_3-second normally closed contact of the second contactor, KA3_3-second normally closed contact of the third contactor, SB2-fourth gear switch. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.
[0017] See also Figure 1-Figure 2 The utility model is a control device for the movement of an overhead crane trolley. Based on the control system of the original overhead crane, distance sensors are respectively installed on the two overhead cranes. The distance sensors are electrically connected to the signal input end of the controller. The controller U1 controls the speed of the overhead crane trolley movement by detecting the actual distance between the two overhead cranes.
[0018] The coil of the first contactor KA1 is electrically connected to the controller U1 through the first normally closed contact KA2_2 of the second contactor and the first normally closed contact KA3_2 of the third contactor. The coil of the second contactor KA2 is electrically connected to the controller U1 through the first normally closed contact KA1_2 of the first contactor and the second normally closed contact KA3_3 of the third contactor, and the coil of the third contactor KA3 is electrically connected to the controller U1 through the second normally closed contact KA1_3 of the first contactor and the second normally closed contact KA2_3 of the second contactor.
[0019] When the controller U1 detects through the distance sensor that the actual distance between the two overhead cranes is greater than the set first safety distance, the controller U1 outputs a signal to the coil of the first contactor KA1 to close the normally open contact KA1_1 of the first contactor, and the overhead crane trolley moves at the third gear speed.
[0020] When the real-time distance between the two overhead cranes is less than or equal to the first safety distance and greater than the set second safety distance, the distance sensor inputs the second distance signal to the signal input end of the controller U1, and the controller U1 outputs a signal to the coil of the second contactor KA2, and the normally open contact KA2_1 of the second contactor closes, and the overhead crane trolley moves at the second gear speed.
[0021] When the real-time distance between the two overhead cranes is less than or equal to the second safety distance, the distance sensor inputs the third distance signal to the signal input terminal of the controller U1, the controller U1 outputs a signal to the coil of the third contactor KA3, the normally open contact KA3_1 of the third contactor closes, and the overhead crane trolley moves at the first gear speed.
[0022] When the controller U1 outputs a signal to the coil of the first contactor KA1, the first normally closed contact KA1_2 of the first contactor that protects the coil of the second contactor KA2 and the second normally closed contact KA1_3 of the first contactor that protects the coil of the third contactor KA3 are disconnected at the same time. When the coil of the first contactor KA1 is energized, the coils of the second contactor KA2 and the third contactor KA3 are not energized, thus protecting the coils of the second contactor KA2 and the third contactor KA3.
[0023] When the controller U1 outputs a signal to the coil of the second contactor KA2, the first normally closed contact KA2_2 of the second contactor that protects the coil of the first contactor KA1 and the second normally closed contact KA2_3 of the second contactor that protects the coil of the third contactor KA3 are disconnected at the same time. When the coil of the second contactor KA2 is energized, the coil of the first contactor KA1 and the coil of the third contactor KA3 are not energized, thus protecting the coil of the first contactor KA1 and the coil of the third contactor KA3.
[0024] When the controller U1 outputs a signal to the coil of the third contactor KA3, the first normally closed contact KA3_2 of the third contactor KA3 that protects the coil of the first contactor KA1 and the second normally closed contact KA3_3 of the third contactor that protects the coil of the second contactor KA2 are disconnected at the same time. When the coil of the third contactor KA3 is energized, the coil of the first contactor KA1 and the coil of the second contactor KA2 are not energized, thereby protecting the coil of the first contactor KA1 and the coil of the second contactor KA2.
[0025] Press the second button switch SB2 and the overhead crane trolley moves at the fourth gear speed.
[0026] Through this control method, it can be achieved that when the actual distance between the two overhead cranes is greater than the set first safety distance, the overhead crane runs in the third gear; when the actual distance between the two overhead cranes is less than the first safety distance, the overhead crane slows down to run in the second gear; when the actual distance between the two overhead cranes is less than the second safety distance, the overhead crane slows down to run in the first gear, ensuring that the two overhead cranes do not collide and ensuring safety. The specific installation distance setting value is set on the controller U1 according to the actual working conditions, minimizing the collision of the two overhead cranes due to the excessive speed of the trolley, which is beneficial to maintaining the stability of the system.
[0027] In the utility model, the process of controlling the action of the relay by the motor and the controller through the real-time distance signal fed back by the distance sensor is the prior art, and the utility model does not improve it.
[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.
Claims
1. A control device for the movement of an overhead crane, characterized in that: It comprises a controller, a first contactor (KA1), a second contactor (KA2), a third contactor (KA3) and a distance sensor, wherein the distance sensor is installed on the overhead travelling crane, and a signal input end of the controller (U1) is electrically connected to the distance sensor; The first gear control terminal of the motor of the overhead crane trolley is electrically connected to the live wire through the normally open contact (KA3_1) of the third contactor, the second gear control terminal of the motor of the overhead crane trolley is electrically connected to the live wire through the normally open contact (KA2_1) of the second contactor, and the third gear control terminal of the motor of the overhead crane trolley is electrically connected to the live wire through the normally open contact (KA1_1) of the first contactor.
2. A control device for the movement of an overhead travelling vehicle according to claim 1, characterized in that: The controller (U1) is connected to the coil of the first contactor (KA1) through a first normally closed contact (KA2_2) of the second contactor and a first normally closed contact (KA3_2) of the third contactor which are connected in series.
3. The control device for the movement of an overhead travelling vehicle according to claim 1, characterized in that: The controller (U1) is connected to the coil of the second contactor (KA2) through a first normally closed contact (KA1_2) of the first contactor and a second normally closed contact (KA3_3) of the third contactor which are connected in series.
4. The control device for the movement of an overhead travelling vehicle according to claim 1, characterized in that: The controller (U1) is connected to the coil of the third contactor (KA3) through the second normally closed contact (KA1_3) of the first contactor and the second normally closed contact (KA2_3) of the second contactor which are connected in series.
5. The control device for the movement of an overhead travelling vehicle according to claim 1, characterized in that: A fourth gear switch (SB2) is also provided between the overhead travelling carriage motor and the live wire for enabling the overhead travelling carriage to move at a fourth gear speed.