CN220097894U - Safety limiting device of ship unloader - Google Patents

Abstract

The ship unloader safety limiting device comprises a power supply module and a frequency converter, and is characterized by further comprising a front-back detection circuit, an upper-lower detection circuit and a control circuit; each set of front and rear detection circuits and each set of upper and lower detection circuits are respectively matched with a laser range finder, the laser range finders of the sets of front and rear detection circuits are respectively arranged at the front side end and the rear side end of the ship unloading frame body, and the laser range finders of the sets of upper and lower detection circuits are arranged outside the upper end of the fixed part of the lifting equipment of the ship unloading machine; the power module, the frequency converter, the control power up-down detection circuit and the front-back detection circuit are arranged in the electric cabinet and are electrically connected. In the utility model, when approaching vehicle or pedestrian in going before or after the ship unloader, when the lifting means of ship unloader promotes the goods and rises highly too high, can in time be in time automatic through the sound suggestion driver of buzzer and carefully drive to reduce the speed of traveling, can play good safety effect. Based on the above, the utility model has good application prospect.

Description

Safety limiting device of ship unloader

Technical Field

The utility model relates to the technical field of ship unloader matched equipment, in particular to a safety limiting device of a ship unloader.

Background

The ship unloader is a device for lifting objects in a ship to a container of an onshore vehicle and the like (some have a self-walking function and some work at a fixed station), and can greatly improve unloading efficiency.

Along with the development of industrial technology, the ship unloader technology has also advanced to a certain extent, for example, patent number 202121414497.3 in China and patent name of a patent entitled ship unloader are described as "in order to solve the above technical problems," the utility model aims to provide a ship unloader which has a simple structure and can collect and recycle coal scattered by a grab bucket ". The above-mentioned patent overcomes some technical problems existing in the prior art, but is limited by the structure, and more or less specific technical problems exist as well as other technologies in the art, which are embodied as follows. When the ship unloader runs forward and backward independently, due to the fact that no practical detection equipment is available, vehicles frequently come and go (people pass through) under the common condition on a dock, and when people in a cab at the high position of the ship unloader do not find vehicles or pedestrians which are too close to each other forward and backward due to various reasons (including blocked sight) or incapacity of working of the people, the probability of accident caused by collision with the vehicles and the pedestrians exists. Also, it does not have the function of up-height prompting of lifting devices (including different grab buckets, hooks, container unloading mechanisms, etc.), and as such, when the operator does not operate correctly in the cab, there is a chance that the lifting device or lifted cargo collides with the upper end of the frame, causing damage to itself or the cargo. To sum up. The ship unloader is particularly necessary to provide a device which can play a safety prompt function for running and lifting cargoes.

Disclosure of Invention

In order to overcome the defects of the prior ship unloader due to limited structure and no practical safety prompting equipment, the utility model provides the safety limiting device of the ship unloader, which can automatically prompt workers in a cab to carefully drive through a buzzer in time and can automatically reduce the running speed of the ship unloader and reduce the collision probability of the ship unloader and other vehicles or pedestrians as much as possible when the lifting height of the lifting equipment is too high under the combined action of related mechanisms and circuits when the ship unloader approaches to the vehicles or pedestrians in front or rear running.

The technical scheme adopted for solving the technical problems is as follows:

the ship unloader safety limiting device comprises a power supply module and a frequency converter, and is characterized by further comprising a front-back detection circuit, an upper-lower detection circuit and a control circuit; the front and rear detection circuits and the upper and lower detection circuits are respectively provided with a plurality of sets, each set of front and rear detection circuits and each set of upper and lower detection circuits are respectively matched with one laser range finder, the laser range finders of the plurality of sets of front and rear detection circuits are respectively arranged at the front and rear side ends of the ship unloader frame body, and the laser range finders of the plurality of sets of upper and lower detection circuits are respectively arranged outside the upper end of the fixed part of the lifting equipment of the ship unloader; the power module, the frequency converter, the control circuit, the up-down detection circuit and the front-back detection circuit are arranged in the electric cabinet, the signal output ends of the multi-path front-back detection circuit are electrically connected with the signal input ends of the control circuit, the signal output ends of the control circuit are electrically connected with the signal input ends of the frequency converter, and the power output ends of the frequency converter are electrically connected with the power input ends of the general control circuit board of the ship unloader.

Further, each set of front-back detection circuit comprises an adjustable resistor, a resistor and an NPN triode which are electrically connected, the front-back detection circuit is connected with the laser range finder, the signal output end of the laser range finder is connected with one end of the adjustable resistor, the other end of the adjustable resistor is connected with one end of the first resistor, one end of the second resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, and the other end of the first resistor is connected with the emitter of the NPN triode.

Further, the control circuit comprises an adjustable resistor, a relay and a buzzer which are electrically connected, wherein one end of the adjustable resistor is connected with one end of the resistor and the normally closed contact end of the first relay, the other end of the adjustable resistor is connected with the positive power input end of the first relay, the normally open contact end of the second relay and the positive power input end of the buzzer, the other end of the resistor is connected with the negative power input end of the first relay and the negative power input end of the buzzer, and the first relay control power input end is connected with the positive power input end of the second relay and the control power input end.

Further, the upper and lower detection circuit comprises an adjustable resistor, a resistor, an NPN triode and a buzzer which are electrically connected, the upper and lower detection circuit is connected with the laser range finder, the positive power input end of the laser range finder is connected with the positive power input end of the buzzer, the signal output end of the laser range finder is connected with one end of the adjustable resistor, the other end of the adjustable resistor is connected with one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, the other end of the first resistor is connected with the emitter of the NPN triode, and the collector of the NPN triode is connected with the negative power input end of the buzzer.

Further, the frequency converter is matched with an adjustable resistor, a power switch, one end of the adjustable resistor, a sliding contact end and the other end of the adjustable resistor are respectively connected with three control signal ends of the frequency converter, an STF port STR port of the frequency converter is respectively connected with one end of two power switches, and the other ends of the two power switches are connected with an SD port of the frequency converter.

The utility model has the beneficial effects that: under the action of the multipath front-rear detection circuit, when approaching a vehicle or a pedestrian in the front or rear running of the ship unloader, people in the cab can be timely warned by the buzzer to prompt the safety driving, and the control circuit can control the frequency converter to output a relatively low-frequency power supply to the total power supply input ends of the plurality of driving motors of the ship unloader, so that the ship unloader (only needs to control back-and-forth non-turning movement) can be decelerated, and the unpredictable risks caused by the over-high speed and the collision of the vehicle or the pedestrian are prevented; when lifting equipment of the ship unloader lifts the goods to be too high in ascending height, workers in a cab can be timely and automatically prompted to drive carefully through sounding of the buzzer, probability of collision between a lifting mechanism or the goods and the top of the ship unloader is reduced, and good safety effect can be achieved. Based on the above, the utility model has good application prospect.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a circuit diagram of the present utility model.

Detailed Description

The ship unloader safety limiting device comprises a power module A1, a frequency converter A3, a front-back detection circuit 1, an upper-lower detection circuit 2 and a control circuit 3, wherein the front-back detection circuit 1 is connected with the frequency converter A3; the front and rear detection circuits 1 are provided with four sets, the upper and lower detection circuits 2 are provided with two sets, each set of front and rear detection circuits and each set of upper and lower detection circuits are respectively matched with a laser range finder A2N and a laser range finder A4N, the laser range finders A2N are arranged on a circuit board in the element box 4, the detection heads of the laser range finders are positioned outside the middle open holes at the front end of the element box 4, the laser range finders A2N of the four sets of front and rear detection circuits 1 are respectively arranged at the left part and the right part at the front and rear side ends of the frame body of the ship unloader 5, and the detection heads of the laser range finders A3N face the front end and the rear end of the ship unloader 5 respectively; the laser range finders A4N are arranged in the shell 6, the shell 6 of the two sets of upper and lower detection circuits is arranged outside the upper end of the fixed part of the lifting equipment 7 of the ship unloader (such as outside the upper end of the grab bucket upper pulley box shell), and the detection heads of the laser range finders A4N face upwards; the power module A1, the frequency converter A3, the control circuit 3, the up-down detection circuit 2 and the front-back detection circuit 1 are arranged in an electric cabinet 8 in a cab of the ship unloader.

As shown in fig. 1 and 2, each set of front-rear detection circuit comprises an adjustable resistor RP1, resistors R1 and R3 and an NPN triode Q1 which are connected through circuit board wiring, and is connected with a laser range finder A2N through a wire, a signal output end 3 pin of the laser range finder A2N is connected with one end of the adjustable resistor RP1, the other end of the adjustable resistor RP1 is connected with one end of a first resistor R1, one end of a second resistor R3, the other end of the second resistor R3 is connected with a base electrode of the NPN triode Q1, and the other end of the first resistor R1 is connected with an emitter electrode of the NPN triode Q1. The upper and lower detection circuit comprises an adjustable resistor RP4, resistors R4 and R5, an NPN triode Q2 and a buzzer B1 which are connected through circuit board wiring, and is connected with a laser range finder A4N through a lead, a pin 1 of a positive power input end of the laser range finder A4N is connected with a positive power input end of the buzzer B1, a pin 3 of a signal output end of the laser range finder A4N is connected with one end of the adjustable resistor RP4, the other end of the adjustable resistor RP4 is connected with one end of a first resistor R4 and one end of a second resistor R5, the other end of the second resistor R5 is connected with a base electrode of the NPN triode Q2, the other end of the first resistor R4 is connected with an emitter electrode of the NPN triode Q2, and a collector electrode of the NPN triode Q2 is connected with a negative power input end of the buzzer B1. The control circuit comprises an adjustable resistor RP2, a resistor R2, relays K2 and K1 and a buzzer B which are connected through circuit board wiring, wherein one end of the adjustable resistor RP2 is connected with one end of the resistor R2 and a normally closed contact end of the first relay K2, the other end of the adjustable resistor RP2 is connected with a positive power input end of the first relay K2, a normally open contact end of the second relay K1 and a positive power input end of the buzzer B, the other end of the resistor R2 is connected with a negative power input end of the relay K2 and a negative power input end of the buzzer B, and the first relay K2 control power input end is connected with a positive power input end and a control power input end of the second relay K1. The frequency converter A3 is matched with an adjustable resistor RP3 and power switches STF and STR, one end and a sliding contact end of the adjustable resistor RP3 are respectively connected with control signal ends 10, 2 and 5 pins of the frequency converter A3, an STF port and an STR port of the frequency converter A3 are respectively connected with one ends of two power switches S1 and S2, and the other ends of the two power switches S1 and S2 are connected with an SD port of the frequency converter A3.

As shown in fig. 1 and 2, the power input terminals 1 and 2 pins of the power module A1 and the two poles of the ac 220V power supply are respectively connected by wires, the 380V ac power supply and the power input terminal R, S, T port of the frequency converter A3 are respectively connected by wires, the power output terminals 3 and 4 pins of the power module A1 and the power input terminal laser range finder A2N of the four-way front-rear detection circuit are respectively connected by wires, the positive power input terminal of the NPN triode Q1 emitter, the power input terminal buzzer B1 of the two-way up-down detection circuit and the other end of the resistor R4, the positive power input terminal of the power input terminal relay K2 of the control circuit and the other end of the resistor R2 are respectively connected by wires, the signal output terminal NPN triode Q1 collector of the four-way front-rear detection circuit and the signal input terminal relay K1 negative power input terminal of the control circuit are respectively connected by wires, the signal output terminal relay K2 normally-closed contact terminal of the control circuit and the signal input terminal 4 pin of the frequency converter A4 are respectively connected by wires, and the power output terminal U, V, W port of the frequency converter A3 and the total control board M of the four front-rear drive motors of the ship unloader are respectively connected by wires to the power input terminal of the power supply circuit of the general control board (the power supply board is also connected by the power input terminal of the control board U, V, W of the ship board).

In fig. 1 and 2, after the 220V ac power enters the power input end of the power module A1, the 3 pin and the 4 pin of the power module A1 output stable dc12V power to enter the power input ends of the control circuit, the up-down detection circuit, the front-back detection circuit, and the above circuits and the frequency converter to be electrically operated. After the frequency converter A3 is powered on, a worker can control the polarity of the power output by the power output end (the power output end is pressed down by the step in the embodiment) by respectively operating and opening the power switches STE and STR, and the driver can adjust the voltage of the signal input to the frequency converter A3 by adjusting different resistance values of the adjustable resistor RP3, so that the frequency converter A3 outputs power with different magnitudes to enter the total control circuit board M of the four front and rear driving motors and the power input end of the total control circuit board of the lifting mechanism (the resistance value of the adjustable resistor RP3 is adjusted to be small, and the power frequency output by the U, V, W port of the frequency converter A3 is relatively large, otherwise relatively low). In the two-path up-down detection circuit, when the lifting height of one set or two sets of lifting mechanisms of the ship unloader does not exceed a set value, one set or two sets of laser range finders A4N are separated by a long distance from a rack at the upper end of the ship unloader, voltage signals output by 3 feet of the laser range finders A4N are divided by an adjustable resistor RP4 and a resistor R4, a resistor R5 is used for reducing voltage and limiting current, the voltage signals enter a base electrode of an NPN triode Q2 to be lower than 0.7V, the NPN triode Q2 is not conducted, and then the buzzer B1 cannot generate electric sound. When the rising height of one or two sets of lifting mechanisms of the ship unloader exceeds a set value, one or two sets of laser rangefinders A4N are close to each other due to the fact that the distance between frames at the upper end of the ship unloader is relatively short, voltage signals output by 3 feet of the laser rangefinder A4N are divided by the adjustable resistor RP4 and the resistor R4, the voltage of the resistor R5 is reduced and limited, the base electrode of the NPN triode Q2 is higher than 0.7V, the NPN triode Q2 is conducted, the low level output by the collector electrode is conducted and enters the negative electrode power supply input end of the buzzer B1, then the buzzer B1 can generate electric sound to prompt personnel in a cab, the lifting mechanism rises too high, the lifting mechanism or the upper end of goods is prevented from colliding with the frames by taking care of operation, when the technician adjusts the voltage of the adjustable resistor RP4 to be relatively high, then the rising height of the lifting mechanism is relatively high, when the voltage of the voltage signal output by the laser rangefinder is relatively high, the NPN triode Q2 is conducted only when the voltage signal output by the laser rangefinder signal is relatively high, namely the novel height detection threshold is small, the resistance value of the adjustable resistor RP4 is relatively small, the resistance is relatively small, the voltage signal output by the novel height detection threshold is required to be set, and the personnel can turn high.

In the four-way front-back detection circuit shown in fig. 1 and 2, when the ship unloader advances or retreats, no vehicle or pedestrian approaches the detection head of the corresponding set of laser range finders A2N at the left and right sides of the front end or the rear end, the voltage signal output by the 3 feet of the ship unloader is relatively small, the NPPN triode Q1 cannot be conducted, the 12V power supply anode controls the power supply input end and the normally closed contact end to enter the 4 feet of the frequency converter A3 through the relay K2, the frequency converter A3 inputs the maximum voltage signal, the U, V, W port of the frequency converter A3 outputs the maximum frequency power supply signal to the power supply input end of the driving motor and the lifting mechanism general control circuit board, and the ship unloader can advance or retreat at relatively high speed. When the ship unloader advances or retreats, a vehicle or a pedestrian on the left and right sides of the front end or the rear end approaches to the detection heads of the corresponding set of laser range finders A2N, a voltage signal output by a3 pin of the ship unloader is relatively large, the voltage signal is divided by an adjustable resistor RP1 and a resistor R1, the voltage is reduced by the resistor R3, the current limiting of the resistor R3 enters the base electrode of an NPN triode Q1 to be higher than 0.7V, the conducting collector of the NPN triode Q1 outputs low level to enter the negative power supply input end of a relay K1, the relay K1 is electrified to suck the control power supply input end of the relay K1 and the normally open contact end of the relay K1 to be closed, the relay K2 is electrified to suck the control power supply input end of the relay K2 and the normally closed contact end of the relay to be open, and the buzzer B is electrified to sound to prompt the driver that personnel or vehicles are on the front side and the rear side of the ship unloader to approach to safety driving. After the relay K2 is electrified, a 12V power supply positive signal does not enter the signal input end 4 pin of the frequency converter A3 any more, a 12V power supply signal enters the other end of the adjustable resistor RP2 through the control power supply input end of the relay K1 and the normally open contact end, a voltage signal enters the voltage signal of the frequency converter through the adjustable resistor RP2 (the higher the resistance value of the adjustable resistor RP2 is adjusted, the higher the voltage division is, the lower the voltage signal entering the frequency converter is, the larger the voltage division is), the voltage signal of the resistor R2 enters the signal input end 4 pin of the frequency converter A3, the voltage signal is only about 6V at the moment (the frequency of the output power supply of the frequency converter A3 is reduced by half due to the reduction of an input control signal), and the rotating speed of a control circuit board such as a driving motor of the ship unloader is reduced by about half due to the lower input power supply frequency. Through the above, in the utility model, under the action of the multipath front-rear detection circuit, when the ship unloader approaches a vehicle or a pedestrian in front or rear running, people in a cab can be timely warned by the buzzer to prompt the safety driving, and a control circuit can control the frequency converter to output a relatively low-frequency power supply to the total power supply input ends of the plurality of driving motors of the ship unloader, so that the ship unloader (only needs to control back-and-forth non-turning movement) can be decelerated, and the unpredictable risks caused by the fact that the speed is not too high and the vehicle or the pedestrian collides are prevented; when lifting equipment of the ship unloader lifts the goods to be too high in ascending height, workers in a cab can be timely and automatically prompted to drive carefully through sounding of the buzzer, probability of collision between a lifting mechanism or the goods and the top of the ship unloader is reduced, and good safety effect can be achieved. In fig. 2, the power module A1 is a finished product of a switching power module for converting ac 220V to dc12V; the buzzer B, B is an active continuous sound buzzer alarm finished product (the sounds emitted by the active continuous sound buzzer alarm finished product and the active continuous sound buzzer alarm are inconsistent, so that workers can distinguish whether the lifting height is too high or vehicles or pedestrians are too close to each other); the types of the relays K1 and K2 are DC12V; the model number of NPN triodes Q1 and Q2 is 9013; the adjustable resistors RP1, RP2, RP3 and RP4 are 47K (respectively adjusted to 12K, 10K, 0K and 13.5K); the resistances of the resistors R1, R3, R2, R4 and R5 are respectively 9K, 10K, 47K, 11.5K and 47K; the laser range finder A2N, A N is a laser range finder module of a model SW-LDS50A, has a range finding distance of 50 meters, and is provided with two power input ends and a signal output end, and when the detector head and an object are close to each other in operation, the voltage signal output by the signal output end is relatively large, otherwise relatively low; the model of the frequency converter A3 is SKI-600.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is limited to the details of the foregoing exemplary embodiments, and that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present disclosure describes embodiments, the embodiments do not include only a single embodiment, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and embodiments may be suitably combined to form other embodiments that will be understood by those skilled in the art.

Claims (5)

1. The ship unloader safety limiting device comprises a power supply module and a frequency converter, and is characterized by further comprising a front-back detection circuit, an upper-lower detection circuit and a control circuit; the front and rear detection circuits and the upper and lower detection circuits are respectively provided with a plurality of sets, each set of front and rear detection circuits and each set of upper and lower detection circuits are respectively matched with one laser range finder, the laser range finders of the plurality of sets of front and rear detection circuits are respectively arranged at the front and rear side ends of the ship unloader frame body, and the laser range finders of the plurality of sets of upper and lower detection circuits are respectively arranged outside the upper end of the fixed part of the lifting equipment of the ship unloader; the power module, the frequency converter, the control circuit, the up-down detection circuit and the front-back detection circuit are arranged in the electric cabinet, the signal output ends of the multi-path front-back detection circuit are electrically connected with the signal input ends of the control circuit, the signal output ends of the control circuit are electrically connected with the signal input ends of the frequency converter, and the power output ends of the frequency converter are electrically connected with the power input ends of the general control circuit board of the ship unloader.

2. The ship unloader safety limiting device according to claim 1, wherein each set of front-rear detection circuit comprises an adjustable resistor, a resistor and an NPN triode which are electrically connected, the adjustable resistor is connected with the laser range finder, the signal output end of the laser range finder is connected with one end of the adjustable resistor, the other end of the adjustable resistor is connected with one end of a first resistor, one end of a second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, and the other end of the first resistor is connected with the emitter electrode of the NPN triode.

3. The ship unloader safety limiting device according to claim 1, wherein the control circuit comprises an adjustable resistor, a relay and a buzzer which are electrically connected, one end of the adjustable resistor is connected with one end of the resistor and a normally-closed contact end of the first relay, the other end of the adjustable resistor is connected with a positive power input end of the first relay, a normally-open contact end of the second relay and a positive power input end of the buzzer, the other end of the resistor is connected with a negative power input end of the first relay and a negative power input end of the buzzer, and the first relay control power input end is connected with a positive power input end of the second relay and the control power input end.

4. The ship unloader safety limiting device according to claim 1, wherein the upper detecting circuit and the lower detecting circuit comprise an adjustable resistor, a resistor, an NPN triode and a buzzer which are electrically connected, the upper detecting circuit is connected with the laser range finder, the positive power input end of the laser range finder is connected with the positive power input end of the buzzer, the signal output end of the laser range finder is connected with one end of the adjustable resistor, the other end of the adjustable resistor is connected with one end of a first resistor and one end of a second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, the other end of the first resistor is connected with the emitter of the NPN triode, and the collector of the NPN triode is connected with the negative power input end of the buzzer.

5. The ship unloader safety limiting device according to claim 1, wherein the frequency converter is provided with an adjustable resistor, a power switch, one end of the adjustable resistor, a sliding contact end and the other end of the adjustable resistor, which are respectively connected with three control signal ends of the frequency converter, an STF port STR port of the frequency converter is respectively connected with one end of two power switches, and the other ends of the two power switches are connected with an SD port of the frequency converter.