11results about How to "Prevent topping" patented technology

The invention provides a boom telescopic control method and device, hoisting equipment and a computer program product, and relates to the technical field of hoisting. The boom telescoping control method comprises the steps of obtaining a control instruction for controlling boom telescoping; and the winch is controlled to rotate according to the control instruction, the winch accommodates the steel wire rope under the condition that the arm frame is shortened and extended, and the winch releases the steel wire rope under the condition that the arm frame is extended. According to the boom stretching and retracting control method, the control instruction for controlling stretching and retracting of the boom is obtained, the winch is controlled to rotate according to the control instruction, under the condition that the boom is shortened and stretched, the winch stores the steel wire rope, and under the condition that the boom is stretched, the winch releases the steel wire rope, and the situation that a lifting hook rushes to the top or falls to the ground in the boom stretching and retracting process is effectively avoided; due to the fact that the telescopic boom and the lifting hook are automatically completed, manual intervention and operation are not needed, the labor intensity of operators is effectively reduced, and the lifting efficiency is improved.

The utility model discloses a laser rangefinder for lifting a table board, which comprises a shell and a laser ranging module arranged in the shell, the shell is provided with a probe hole for laser to penetrate through, the shell is also provided with a notch part, the inner side of the notch part comprises a first reference surface and a second reference surface which extend in different directions, and the first reference surface and the second reference surface are arranged on the shell. The extension direction of the first reference surface is perpendicular to the extension direction of the probe hole. According to the lifting table, the ground clearance of the lifting table board can be accurately measured through the laser range finder, whether the lifting table board is inclined or not can be conveniently judged, and the laser range finder can be rapidly positioned on the lifting table board so that measurement can be conveniently conducted. In addition, the utility model further discloses an electric lifting table provided with the laser range finder.

The invention relates to the technical field of supports, and discloses an elevator direction guide counterweight guide rail bracket which comprises a counterweight housing, a guide part mounted on the counterweight housing and used for providing accurate guide compensation for a counterweight and ensuring stable operation of an elevator, and a cooperative part mounted on the guide part and used for cooperative work and guide linkage of the guide part. By adopting the structure formed by the cross beam, the U-shaped frame, the L-shaped arm, the buffer pad, the spring and the like of the buffer part, when an elevator breaks down, collision impact of a counterweight can be effectively buffered, when the counterweight frame rushes to the top, the L-shaped arm extending out of the upper portion makes contact with a ceiling preferentially and slides along the inner wall of the U-shaped frame through extrusion, meanwhile, the spring is stretched for buffering, and the service life of the counterweight frame is prolonged. The L-shaped arm is inserted between the two gears to be meshed, the gears are driven to rotate in the opposite direction, the counterweight frame rebounds and resets by a certain distance along the guide rail, and the situation that the counterweight frame directly collides with a ceiling to cause scrapping and huge safety risks is avoided.

The application discloses an automatic wheel divider which is connected with a horizontally arranged I-shaped steel beam, and comprises a wheel dividing assembly, a fixing plate, an elastic connecting piece and a limiting support. The fixing plate is connected to the lower end of the I-shaped steel beam, and the limiting support is arranged on the fixing plate. The wheel dividing assembly comprises a power arm, a wheel dividing rod and two parallel arranged wheel dividing side plates. The lower end surfaces of the wheel dividing side plates form an included angle, the wheel dividing rod is vertically arranged between the two wheel dividing side plates and is connected to and fixed at the two ends close to the wheel dividing side plates. The middle parts of the two wheel dividing side plates are connected with a long ear seat plate II fixed on the fixing plate. The end of the power arm is connected with the wheel dividing rod which extends out of the one end of the wheel dividing side plate, and the middle part of the power arm is rotationally connected with a long ear seat plate I on the fixing plate. One end of the elastic connecting piece is connected with the power arm, and the other end thereof is connected with the I-shaped steel beam. The limiting support is arranged close to the front end of the wheel dividing side plate. The application solves the problems of the inflexible wheel dividing and the easy damage of components in the traditional lifting equipment, and realizes the self-powered wheel dividing.

The utility model discloses a lower hanging construction platform based on a self-climbing elevator machine room. The lower hanging construction platform (3) is arranged below the elevator machine room (1); the lower hanging construction platform comprises a platform body (31) and stand columns (32), the upper ends of the stand columns are fixedly connected to the bottom of the elevator machine room, the platform body is fixedly connected with the lower ends of the stand columns, and the platform body is fixedly arranged below the elevator machine room through the stand columns; a crawling ladder (34) is arranged between the platform body and the elevator machine room, so that operators can move downwards to the platform body from the elevator machine room along the crawling ladder. The lower hanging construction platform can be used for filling tongue holes which are not needed any more below a closed elevator machine room, so that construction operation is facilitated; the protective cage is adopted to surround the steel wire rope lowered by the traction machine, and the steel wire rope is isolated from the standing space of the lower hanging construction platform, so that the safety of operators is guaranteed.

The invention provides a lifting appliance heavy hammer limiting device. The lifting appliance heavy hammer limiting device comprises a triggering mechanism, a heavy hammer mechanism, a platform, a guide mechanism, an anti-swing mechanism, a height detector and a lifting appliance. The trigger mechanism is fixed on a platform of the crane, the guide mechanism is used for guiding the heavy hammer mechanism, the anti-swing mechanism is connected with the guide mechanism and the platform, the height detector is fixed at the lower end of the guide mechanism, and the lifting appliance is positioned below the device; a spring is arranged in the triggering mechanism and the triggering speed is increased through elastic force; the guide mechanism can enable the counter weight mechanism to accurately trigger the limit switch; the anti-swing mechanism prevents the guide mechanism from swinging and has an anti-falling function; the height detector is provided with an early warning value, when the height of the lifting appliance reaches the early warning value, the limiting switch can be triggered, the lifting power source is disconnected, and the lifting appliance is prevented from rushing against the platform. The problems that under the working conditions of high lifting height, large wind load and vibration, a traction steel wire is prone to being wound, an ejector rod is prone to being clamped, a device falls to hurt people, and the response is slow are solved, and the lifting appliance is prevented from impacting the top platform rapidly, effectively and accurately.

This utility model discloses a composite safety braking device for elevator cars, comprising: an elevator control system, a first drive module, and a second drive module; the elevator control system is connected to the first drive module and the second drive module; the elevator control system is used to monitor the car's operating signals, upper leveling signals, and lower leveling signals to determine the car's operating status and position; the first drive module is used to brake the traction sheave to indirectly stop the car; the second drive module is used to directly stop the car at the target position on the elevator guide rail to achieve secondary protection; the first drive module brakes the traction sheave to achieve conventional stopping; while the second drive module can directly act on the elevator guide rail to firmly fix the car at the target position, effectively overcoming the safety hazards caused by traditional braking systems relying on mechanical transmission links such as steel wire ropes and traction sheaves.

This invention relates to the field of belt conveyors and discloses a tensioning device for a long-distance belt conveyor, comprising a tensioning trolley and a tower counterweight device. The tensioning device includes a braking drum mechanism disposed between the tensioning trolley and the tower counterweight device. The braking drum mechanism includes a support bracket fixed to the ground, a drum for winding multiple turns of steel wire rope, and a braking mechanism for braking the drum. The support bracket has two suspended extension ends, the drum is rotatably disposed between the two suspended extension ends, and the braking mechanism is disposed at one end of the drum's axial direction. This tensioning device, by adding a braking drum mechanism between the tensioning trolley and the tower counterweight device, brakes the steel wire rope when encountering instantaneous changes in tension, thus fixing the steel wire rope and preventing the tower counterweight device from overshooting or crashing to the ground.

The invention relates to an elevator capable of automatically compensating traction force and a compensation method applying the elevator, and the elevator comprises a counterweight pressure sensor, a lift car pressure sensor, a traction steel wire rope, a guide wheel, a traction wheel, a lift car, a counterweight, a lift car diversion sheave, a counterweight diversion sheave and a compensation mechanism, the counterweight diversion sheave is installed at the upper end of the counterweight, one end of the traction steel wire rope is connected with the counterweight pressure sensor and sequentially wound around the counterweight diversion sheave, the guide wheel, the traction wheel and the lift car diversion sheave, the other end of the traction steel wire rope is connected with the lift car pressure sensor, and the compensation mechanism is connected with the lower end of the lift car and the lower end of the counterweight. According to the elevator capable of automatically compensating the traction force and the compensation method applying the elevator, the traction force of the whole system is dynamically regulated and controlled by continuously monitoring the tension of the counterweight side traction steel wire rope and the tension of the lift car side traction steel wire rope and providing the pull-down force of the lift car when compensation is needed, so that the lift car is prevented from rushing to the top.

The present invention provides a position adjustment device, method and belt conveyor of a gravity tensioning device, wherein the position adjustment device of the gravity tensioning device comprises: a position detection device, an adjustment device and an electric winch, wherein the detection device is connected to one end of the adjustment device, the detection device detects the position signal of the weight in the belt conveyor gravity tensioning device, and sends the position signal to the adjustment device; the other end of the adjustment device is connected to one end of the electric winch, the adjustment device receives the position signal, and sends a rotation instruction to the electric winch according to the position signal; the electric winch is connected to the weight, the electric winch receives the rotation instruction, and adjusts the position of the weight according to the rotation instruction. By implementing the present invention, the automatic adjustment of the position of the gravity tensioning device is realized, human resources are saved, and omissions in manual operation are avoided, the adjustment error is small, and the occurrence of accidents of the weight hitting the top or falling can be effectively avoided.

The invention provides an elevator operation health state monitoring method and an elevator safety system, and belongs to the technical field of elevators. According to the method, the elevator speed is calculated according to RFID tags pre-arranged in a hoistway; if the elevator speed exceeds the preset speed, the car position at the next moment is calculated, and if the distance between the car position at the next moment and the top and the bottom of the hoistway does not exceed the limit safety distance, early warning is conducted, and a brake is started; if the position of the lift car exceeds the limit safety distance at the next moment, the safety tongs are informed to stop the lift immediately, monitoring is ended, and an alarm is given; after the brake is started, if the elevator does not decelerate, the power supply of the brake is cut off, according to different positions of the elevator car at the next moment, the safety tongs are started by the self-generating equipment to slowly stop or immediately stop, and if the elevator decelerates, the elevator is stopped in different modes according to the position of the elevator car at the next moment. The elevator can be stopped under the power failure condition, and the danger of top rushing and bottom squatting is avoided.