Ultrasonic safety limiter of crane

Abstract

The utility model relates to the technical field of special equipment of cranes, and discloses an ultrasonic safety limiter of a crane, which comprises a shell, and a power supply module, a main control module and an ultrasonic ranging module which are arranged in the shell, and the power supply module comprises an isolation voltage reduction unit, an input filtering unit and a voltage stabilization filtering unit; the main control module comprises a controller unit and a relay unit; the ultrasonic ranging module comprises an ultrasonic transceiving chip unit, an ultrasonic transmitting sensor unit and an ultrasonic receiving sensor unit; and the ultrasonic transceiving chip unit is connected with the controller unit and performs data communication with the controller unit. The high-voltage alternating current of the crane is directly used for supplying power to the ultrasonic safety limiter, an original circuit and an original control program of the crane do not need to be excessively modified, application cost and popularization difficulty are reduced, and the ultrasonic safety limiter has the advantages of being simple in structure, reasonable in design, convenient to connect and use, high in practicability and good in using effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of special equipment of crane, concretely relates to a crane ultrasonic safety limiter. BACKGROUND

[0002] The safety limiter of the bridge and portal crane plays a vital role in the bridge and portal crane, ensures the safe operation of the crane, mainly adopts mechanical limit switch and infrared limit switch, the mechanical limit switch mainly includes weight hammer type limiter, broken fire type limiter, press plate type limiter and transmission type limiter, and the mechanical limit switch generally has the problems of insufficient limit precision and reliability. Although the infrared limit switch has high limit precision, it depends on the infrared light intensity reflected by the reflector, is easily influenced by the light environment and the cleaning degree of the reflector, and has insufficient reliability.

[0003] In the prior art, the utility model patent with publication number CN205087824U discloses an ultrasonic stroke limiter, although precise stroke limiting is realized through ultrasonic waves, the control circuit of the electrical control box needs to be modified to realize the conduction angle of the microcomputer controlled silicon, on the one hand, the modification of the control circuit is a huge system engineering, resulting in very high application cost, on the other hand, because the modification of the control circuit is involved, many customers are unwilling to modify, resulting in great difficulty in product promotion.

[0004] Therefore, the applicant innovatively designs the crane ultrasonic safety limiter of the present application to reduce the application cost, make the customers more easily accept, and reduce the difficulty of promotion. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a crane ultrasonic safety limiter to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme.

[0007] A crane ultrasonic safety limiter, comprising a shell, a power module, a main control module and an ultrasonic ranging module arranged in the shell, the power module being electrically connected with the main control module and the ultrasonic ranging module.

[0008] The power module comprises an isolation voltage reduction unit, an input filter unit is arranged between the isolation voltage reduction unit and a power input end, and a voltage stabilizing filter unit is arranged between the isolation voltage reduction unit and a power output end.

[0009] The main control module comprises a controller unit and a relay unit connected with the controller unit.

[0010] The ultrasonic ranging module comprises an ultrasonic transceiving chip unit and an ultrasonic transmitting sensor unit and an ultrasonic receiving sensor unit connected with the ultrasonic transceiving chip unit.

[0011] The ultrasonic transceiving chip unit is connected with the controller unit and communicates data.

[0012] The power module is further provided with an over-temperature protection unit for detecting the temperature of the whole power module, and the input part of the power supply is cut off when the temperature is too high, thereby protecting the whole circuit module and the master control module and the ranging module at the rear end.

[0013] The relay unit comprises at least one relay and a pressure-sensitive resistor connected in parallel with the relay.

[0014] The master control module further comprises a key unit and a warning unit connected with the controller unit.

[0015] The power module, the master control module and the ultrasonic ranging module are separately formed into different circuit boards, or at least two modules are integrated on one circuit board.

[0016] The utility model discloses relative to prior art has obtained the beneficial effect:

[0017] The utility model discloses a power module, master control module and ultrasonic ranging module are arranged in the positioner casing, and the power module is converted into low voltage direct current for the high voltage alternating current of crane use through the cooperation of the isolation voltage reduction unit, input filter unit and voltage stabilizing filter unit, and the master control module and ultrasonic ranging module are powered, and the controller unit of master control module is connected with the relay unit and is accessed crane's actuating mechanism control circuit, can directly control crane's actuating mechanism, thereby realizing that the high voltage alternating current of crane can directly be used to power ultrasonic safety positioner, and the original circuit and control program of crane do not need too many transformations, and the installation application cost is reduced obviously, also avoids the security worry of customer because of the transformation of crane control circuit, makes the customer more easily accept, reduces the popularization difficulty.

[0018] Preferably, the over-temperature protection unit is arranged in the power module to avoid damage to the safety positioner due to high temperature, and the pressure-sensitive resistor is connected in parallel with the relay to protect the contact inside the relay from being burned out, thereby effectively improving the safety reliability and service life. The key unit and the warning unit of the master control module facilitate the installation, debugging and state indication of the safety positioner, and can timely send sound and light warning signals in case of failure, so that timely measures and maintenance can be taken.

[0019] The utility model discloses reduce application cost and popularization difficulty, with simple structure, reasonable in design, convenient connection and use, strong practicality, good use effect's characteristics, facilitate ultrasonic wave positioner on the door bridge type crane and other similar use alternating current high voltage's equipment popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the connection structure schematic diagram of the embodiment of the application. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. EMBODIMENT

[0022] Referring to Figure 1 A crane ultrasonic wave safety positioner, including shell and setting in the power module, main control module and ultrasonic wave distance measuring module of shell, power module is connected with main control module, ultrasonic wave distance measuring module electricity, is responsible for the power supply of ultrasonic wave safety positioner whole system, the power module includes isolation voltage reducing unit, and isolation voltage reducing unit is provided with input filter unit between power input end, and is provided with voltage stabilizing filter unit between power output end;Power module accesses the high voltage alternating current of crane use, and converts into low voltage direct current, and isolation voltage reducing unit adopts known small transformer, and input filter unit and voltage stabilizing filter unit all adopt capacitor, for example, converts 220V or 380V alternating current into 5V / 2A direct current, simultaneously insulates and isolates alternating current high voltage end and direct current voltage end, protects rear-end circuit, reduces high-frequency interference, in the embodiment, the power module still is provided with over-temperature protection unit, detects the temperature of whole power module, and temperature is too high and will cut off the input part of power supply, protects whole circuit module and rear-end main control module and distance measuring module.For example, provides 105 DEG C forced over-temperature protection, and over-temperature protection unit adopts thermistor element, and once reaching 105 DEG C, thermistor element cuts off the input part of power supply, and protects whole circuit module and rear-end main control module and distance measuring module.

[0023] The master control module includes a controller unit and a relay unit, a key unit and a warning unit connected with the controller unit, the relay unit includes at least one relay and a pressure sensitive resistor connected in parallel with the relay, according to different application scenarios, the relay unit can be provided with different number of relays, the start-stop action of the actuator of the crane is controlled by closing or opening the circuit through the relay contact. The key unit is provided with a debugging key, such as taking the current distance as a threshold by long pressing the key. The warning unit includes a prompt light or a sound and light alarm, the running state of the device is indicated by sound and light signals, and sound and light warning signals are sent in time when a fault occurs, so that measures and maintenance can be taken in time.

[0024] The ultrasonic ranging module includes an ultrasonic transceiver chip unit and an ultrasonic transmitting sensor unit and an ultrasonic receiving sensor unit connected with the ultrasonic transceiver chip unit; the ultrasonic transceiver chip unit is connected with the controller unit and communicates data. The controller unit makes the ultrasonic transmitting sensor send ultrasonic signals through the ultrasonic transceiver chip unit, and receives the ultrasonic signals reflected back by the object through the ultrasonic receiving sensor unit, the ultrasonic transceiver chip unit converts the digital signals and feeds back to the controller unit, the controller unit converts the digital signals into actual distance, when the detected distance is less than the threshold, the controller unit disconnects the circuit through the relay unit, and the actuator of the crane stops.

[0025] The power module, the master control module and the ultrasonic ranging module in the embodiment are integrated on the same circuit board, and according to the needs of the shell design and the installation position, the power module, the master control module and the ultrasonic ranging module can be divided into different circuit boards, or two modules are integrated on one circuit board.

[0026] The above is part of the embodiments of the present application, and is not limited to the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An ultrasonic safety limiter for cranes, characterized in that: It includes a housing and a power module, a main control module and an ultrasonic ranging module disposed within the housing. The power module is electrically connected to the main control module and the ultrasonic ranging module. The power module includes an isolation step-down unit, an input filter unit is provided between the isolation step-down unit and the power input terminal, and a voltage regulation filter unit is provided between the isolation step-down unit and the power output terminal. The main control module includes a controller unit and a relay unit connected to the controller unit; The ultrasonic ranging module includes an ultrasonic transceiver chip unit and an ultrasonic transmitting sensor unit and an ultrasonic receiving sensor unit connected to the ultrasonic transceiver chip unit. The ultrasonic transceiver chip unit is connected to the controller unit and performs data communication.

2. The ultrasonic safety limiter according to claim 1, characterized in that: The power module is also equipped with an over-temperature protection unit, which detects the temperature of the entire power module. If the temperature is too high, the power input will be cut off to protect the entire circuit module as well as the back-end main control module and ranging module.

3. The ultrasonic safety limiter according to claim 1, characterized in that: The relay unit includes at least one relay and a varistor connected in parallel with the relay.

4. The ultrasonic safety limiter according to claim 1, characterized in that: The main control module also includes a button unit and an alarm unit connected to the controller unit.

5. The ultrasonic safety limiter according to claim 1, characterized in that: The power module, main control module, and ultrasonic ranging module are separate circuit boards, or at least two modules are integrated on one circuit board.

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