52results about How to "Start and stop smoothly" patented technology

The invention provides a shuttle vehicle positioning system and a control method. A radio frequency code reader and a groove type photoelectric switch are installed at the bottom of a shuttle vehicle. Code carriers and a location identification chip are installed close to a rail. The code carriers are arranged in the positions, 3-4 m away from a loading table and an unloading table, of the rail correspondingly. The code carriers and the location identification chip are arranged in the positions of the loading table and the unloading table. The location identification chip corresponds to the groove type photoelectric switch in position. The code carriers are arranged on the rail at an interval of 3-4m. Different numbers are set for the code carriers. The shuttle vehicle is installed on the operation rail. A programmable controller communicates with an industrial control computer on the ground through a wireless communication device. The industrial control computer communicates with the programmable controller installed on the shuttle vehicle through the wireless communication device. The programmable controller is connected with the radio frequency code reader and the groove type photoelectric switch through a port of the programmable controller. According to the shuttle vehicle positioning system and the control method, accurate positioning is achieved through combination of the radio frequency code reader and the groove type photoelectric switch, and the positioning system is stable, reliable, high in precision, low in cost and wide in application range.

The invention relates to an automatic temperature control device of a large cooling tower group which comprises a plurality of blowers. The high temperature cooling water of a high temperature working machine is cooled by running through the blower and imported into a cold water pool to save, and the water is pumped to the high temperature working machine from the cold water pool to achieve the recycling of the cooling water, one of the plurality of the blowers is selected as a main blower, the others are the assistant blowers, the main contactors of the blower motor are connected in parallel and connected with a soft starter which is connected with and controlled by a programmable controller, a temperature sensor is arranged into the cold water pool, the signal of the temperature sensor is output to a PID digital regulator which inputs the signal to the programmable controller and a converter which is connected with the main blower, the assistant blowers are connected with the soft starter and a working frequency power supply, and the programmable controller accomplishes the conversion and the control. The device has the advantages of convenient control, gentle start and stop, economical and practical properties, and environmental protection and the device can also save power by more than 30 percent.

The invention relates to a three-level interlocking brake system of a pneumatic tyre roller. The three-level interlocking brake system is characterized by including hydraulic center self-locking brake, wheel-side brake and rear axle brake and consisting of a travel pump (1), an emergency brake solenoid valve (2), a drive axle brake (4), a drive motor (5), a first wheel-side brake (6), a second wheel-side brake (7), a foot brake pressure transmitter (8), a foot brake valve (9), a drive motor revolution sensor (10), a controller (11) and a handle (12). As interlocking linkage protection and power cut-off protection to hand brake, foot brake and emergency brake are realized by means of the electronic control technology and the sensor technology, reliability, stability and operational comfort of the brake performance of the whole unit are improved, and road surface operation quality is improved.

The invention discloses a distributing shuttle vehicle located by a magnetic grid ruler for an automatic stereoscopic warehouse, comprising a rack, wherein the rack is connected with a ground rail via a travelling wheel, and a chain-type conveyer and an electrical control cabinet are arranged on the rack. The shuttle vehicle is characterized in that a magnetic grid sensor is arranged on the bottom of the rack, and a magnetic grid ruler is arranged right ahead the magnetic grid sensor. The shuttle vehicle disclosed by the invention has the characteristics of being cost-saving, convenient to use, simple in structure, high in location accuracy, economic and practical, wide in application range, and the like.

The invention provides an elevating fire vehicle boom control method and system and an elevating fire vehicle. By means of the elevating fire vehicle boom control method and system and the elevating fire vehicle, vibration caused when a boom starts and/or stops can be eliminated, and stability and safety of the boom in the operation process can be improved. The method includes operation executed when the boom is controlled to start and/or the boom is controlled to stop. When the boom is controlled to start, the expected movement speed signal v0 of the boom is confirmed, and the corresponding drive oil cylinder flow L0 is calculated when the boom stably moves according to the expected movement speed signal v0; the flow L1 required for making a drive oil cylinder drive the boom to start in a constant-speed manner is obtained; the maintenance time t1 of the flow L1 is obtained; and the flow of the drive oil cylinder is controlled to meet the flow L1, and under the condition that the maintenance time of the flow reaches the maintenance time t1, the flow of the drive oil cylinder is controlled to meet the flow L0.

The invention discloses a cooling bed lifting hydraulic synchronous control device. The device comprises a plurality of proportional direction valves arranged on hydraulic valve stand beside a cooling bed in parallel, an electromagnetic reversing valve and a hydraulic control check valve are arranged on a communication pipeline of the proportional direction valves and hydraulic oil, an oil outlet pipeline of each proportional direction valve is further connected with a servo hydraulic cylinder, displacement sensors serving as external displacement sensors are arranged on the servo hydraulic cylinders, the displacement sensors are also connected with the proportional direction valves, and the proportional direction valves and the displacement sensors form position closed loops. Closed-loop control precision of cooling bed lifting hydraulic synchronous control can reach +/-1 mm; compared with existing cooling bed lifting control schemes, synchronous control precision is very high, and synchronous control precision can also be guaranteed especially when unbalance loading of the cooling bed is large; by setting a curve of proportional direction valve control signals, stable start and shutdown are easy to achieve, and quick lifting operation is achieved.

The invention discloses a movable radioactive waste sorting device and a using method thereof. The device comprises a mounting platform mounted at the top of a low shielding wall; railways are arranged on the mounting platform in the length direction; a trolley which can slide along the railways is arranged on the railways; two manipulators are mounted on the trolley side by side; clamp forceps ofthe manipulators are located in a radioactive waste storage area located inside the low shielding wall; and a dosage measurement instrument and a video system are further mounted on an inside wall surface of the low shielding wall. According to the sorting device disclosed by the invention, the mounting platform is connected to supporting vertical posts by bolts; when other radioactive waste storage areas need sorting, the platform can be detached quickly; the overall sorting device is moved to the low shielding wall of the radioactive waste storage area for performing sorting work; and a detachable structure is high in flexibility, wide in applicability, and convenient to mount and detach, and facilitates transportation and adjustment.

The invention relates to an automatic-control constant-pressure oil pump, which transmits the lubricant of oil box via the oil pump to the lubricant outlet tube, into the diesel engine. One oil pump is driven by one frequency-variable motor, and other oil pumps are driven by general motors. The frequency-variable motor is connected to one frequency changer. The general motors are connected to the soft starter. The lubricant outlet tube contains a pressure sensor connected with one digit adjuster. The digit adjuster is communicated with the frequency changer. The frequency changer, soft starter and the digit adjuster are connected into one port of programmable controller. The frequency changer, soft starter, digit adjuster and the programmable controller are parallel connected with the power source. The invention can realize automatic controlled constant-pressure oil feeding, with low cost.

The invention discloses an automatic temperature control device for a cooling fan on a cooling tower. The device comprises a water temperature sensing thermocouple and a feedback temperature controller, wherein the water temperature sensing thermocouple is arranged at a water outlet in a water tank of the cooling tower and on a mounting device on the wall of the cooling tower; the temperature controller is arranged at a power line inlet; the device is characterized in that: after the water temperature sensing thermocouple arranged in the cooling tower senses water temperature and the feedback temperature controller acquires a water temperature signal, the temperature controller controls a motor to start a relay to control the starting and the stopping of the motor; the water temperature sensing thermocouple is made of a PT100 platinum resistive material; the temperature controller is an XMTE200 temperature controller; and a shielding thermocouple line is used for line connection between the thermocouple and the temperature controller. Thus, the fan can be started stably relatively, and the starting and the stopping of the fan are not needed to be controlled according to temperature of cooling water, so the labor intensity is reduced, the control accuracy is improved, and the fan can be prevented from being frequently started or stopped.

The invention discloses a frequency converting control system of a tower crane. The frequency converting control system comprises a PLC (programmable logic controller) control system and a tower crane lifting frequency converting control system, wherein the PLC control system is respectively connected with the tower crane lifting frequency converting control system, a tower crane rotation frequency converting control system, a tower crane amplitude and frequency converting control system, a tower crane command control system, a tower crane braking system, a tower crane safe control system and a tower crane loading and torque detecting system; a lifting driving system is connected with the tower crane lifting frequency converting control system, a rotation driving system is connected with the tower crane rotation frequency converting control system, and an amplitude changing driving system is connected with the tower crane amplitude and frequency converting control system; an electromechanical magnetism braking power supply, the tower crane lifting frequency converting control system, the tower crane rotation frequency converting control system and the tower crane amplitude and frequency converting control system are respectively connected with a main power supply; the electromechanical magnetism braking power supply is used for providing an electromagnetic braking input power supply for the tower crane braking system, and the tower crane braking system is respectively used for providing a tower crane braking executing power supply for the lifting driving system, the rotation driving system and the amplitude changing driving system.

The invention discloses a glass spotlight cup light source mounting hole forming device. The device comprises a circular base plate and a pneumatic punching machine installed on the base plate; a rotating conveyor which is used for placing glass spotlight cup holders is arranged on the pneumatic punching machine, a softening combustion heater and a combustion heater are provided below the rotating conveyor, and the rotating conveyor is provided with a rotating conveyor index plate and also comprises a punching machine guide mechanism and a glass lamp cup holding mechanism. The mounting hole forming device provided in the invention has the advantages of consistency of formation of glass spotlight cup light source mounting holes, good stability, a fast forming speed and high production efficiency.

The invention discloses a remote monitoring system for an air conditioner in a substation machine room, and relates to a monitoring system. The system comprises a temperature sensor, a digital thermometer, an infrared emission sensor and related software, wherein the temperature sensor has warning temperatures of a resolution setting and a user setting, stored in an EEPROM (Electrically Erasable Programmable Read-Only Memory); the digital thermometer is used for reflecting the temperature value of a device in a nine-digit quantity mode and sending/receiving information via a single-wire interface and is connected with a central microprocessor; the infrared emission sensor and an infrared receiving sensor are used in a matching way to form an infrared remote control system, an infrared remote control signal is a series of binary pulse codes and is firstly modulated on a specified carrier frequency, and the on/off of the air conditioner can be controlled by the software when the infrared remote control signal is matched with the current air conditioner. The remote monitoring system is suitable for an unmanned substation, monitoring of the operation of an air conditioner device without a special channel, detection on the temperature and the humidity of an environment and remote switching of the air conditioner device.

The invention discloses an eccentric block provided with a movable counterweight block. The eccentric block provided with the movable counterweight block comprises an eccentric block chassis, a movable counterweight block and a spring, wherein a similar involute rail for limiting the moving range of the movable counterweight block and supplying supporting force is arranged on the eccentric block chassis; the movable counterweight block is arranged in the similar involute rail and can reciprocate at a position close to the center of a main shaft and a position far away for the center of the main shaft along a route of a similar volute; a spring fixing seat is arranged on the eccentric block chassis; one end of the spring is connected to the movable counterweight block, and the other end ofthe spring is connected to the spring fixing seat. The eccentric block provided with the movable counterweight block is applicable to a vibrator and a vibration screen, and is small in rigidity and compression strength of the supplied spring; the structure is compact; the resonant vibration range of the vibrating screen is reduced while the vibrating screen moves through a resonance area during being started and stopped, and the dynamic load over the ground is reduced; surrounding components cannot be impacted due to wide vibration range, and a screening machine body is prevented from adverseinfluence.

The invention relates to a transmission device, and discloses a transmission device for an X-ray ground rail trolley. In the present invention, it includes a frame, a slider assembly arranged on the trolley for driving the trolley to slide along the length direction of the frame, an electromagnet fixed on the slider assembly, and an electromagnet arranged on the frame for attracting or releasing The electromagnetic suction plate of the electromagnet, the motor base set on the frame, the motor set on the motor base, the electromagnetic clutch set on the motor shaft, the drive wheel fixed on the output disc of the electromagnetic clutch, and the drive wheel connected with the drive wheel The synchronous belt, the driven wheel connected with the synchronous belt, the bracket set on the frame for placing the driven wheel, the main control unit, the first limit switch and the second limit switch which are relatively set at both ends of the frame for sensing the trolley . Compared with the prior art, the device can be operated automatically or manually, and the start and stop are more stable and the braking force is high.