The retractable belt conveyor works on the same principle as the ordinary belt conveyor. It uses the tape as a continuous transportation equipment for the traction loader. Compared with the ordinary belt conveyor, it adds a belt storage device and retraction device. When the traveling trolley moves toward the tail end of the conveyor, the tape enters the tape storage device and the tail retracts; otherwise, the tail extends, thus making the conveyor telescopic.
Structural Overview
The telescopic belt conveyor is divided into two parts: fixed part and non-fixed part. The fixed part consists of the machine head transmission device, the tape storage device, the tape retracting and releasing device, etc.; the non-fixed part consists of the quick-detachable bracket without bolt connection, the tail, etc.
1. The machine head transmission device consists of a transmission drum, a reducer, a hydraulic coupling, a frame, an unloading drum, and a cleaner.
n The machine head transmission device is the driving part of the entire conveyor. The two motors transmit torque to the two transmission rollers through hydraulic couplings and reducers (two gears can also be connected in series) transmission). When using gear transmission, a set of motors, hydraulic couplings and reducers should be removed.
n The hydraulic coupling is YL-400 type. It is composed of a pump wheel, a turbine wheel, a casing, a driven shaft, etc. Its characteristic is that there is an auxiliary chamber on the side of the pump wheel. After the motor is started, The liquid flow enters the working chamber through the small hole, so that the load can be started in a relatively balanced manner and the motor starts at a near-hard load. During operation, No. 20 mechanical oil is added to the casing, and the oil filling volume is 14m3. The reducer uses an upper gear to reduce the speed. , the first stage is an arc bevel gear, the second and third stages are helical and spur gears, the total transmission ratio is 25.564, and can be universally interchanged with the SGW-620/40T scraper conveyor, and the reducer uses bolts Connect directly to the rack.
n The transmission drum has a welded structure with an outer diameter of Φ500 mm. There is a special vulcanized rubber layer on the surface of the drum. Therefore, it has a greater effect on improving the EUA value of the tape and the drum, preventing slipping, and reducing the initial tension. Good results.
n Unloading end and head cleaner, belt type backstop, convenient for unloading. There is an extended unloading arm at the front of the machine head, which is composed of an unloading roller and an extension frame. The roller is installed on the extension frame. On the machine head, its axis position can be adjusted through the bolts on both sides of the bearing to adjust the deviation of the tape on the machine head. Two cleaners are installed at the lower part of the unloading drum. Since the cleaner scraper is pressed tightly against the tape, The adhering crushed coal can be removed, and the belt backstop prevents the belt from reversing when parking.
n The frame is a welded structure and is assembled with bolts. All parts of the machine head transmission device are installed on the frame. The motor and reducer can be installed on the left or right side of the frame depending on the situation.
2. The tape storage device includes a tape storage bogie, a tape storage bin, a reversing roller, a roller trolley, a traveling trolley, a tensioning device, a tensioning winch, etc.
n The frame of the tape storage device is composed of a frame and a bracket connected by bolts. Three fixed reversing rollers and two reversing rollers on the traveling trolley are installed on the two rotating frames of the machine head transmission device. At the same time, the tape is guided back and forth in the tape storage device. Fixed trough-shaped rollers and flat rollers are installed on the shelf to support the tape. There are tracks on the inside of the shelf for the rollers and the traveling car to travel.
n The fixed reversing roller is a fixed-axis type. It is used to main support the tape when the tape storage device is storing tape, so that the drape is not too large. The roller trolley changes with the position of the traveling trolley. Changes require manual labor to pull out or return.
n The swimming trolley is composed of a frame, a reversing roller, a pulley set, wheels, etc. The pulleys are assembled behind the body to adapt to another pulley set, and their position ensures that the body will not be lifted when force is applied. , In this way, it has a better effect on maintaining the stability of the vehicle body and preventing the tape on the reversing roller from wandering. The lower part of the vehicle body is also equipped with anti-climb hooks to prevent the wheels from derailing and falling off the track.
n When the swimming trolley moves to the left, the tape is released and the fuselage is extended. When the swimming trolley moves to the right, the tape is stored and the fuselage is shortened. The swimming trolley can be tightened by the wire rope. The tape is properly tensioned.
n At the rear of the tape storage device, there are a tensioning winch, a tape tension indicator and a tension buffer. The function of the tension buffer is to keep the belt at a certain level when the conveyor is started. tension to reduce unloaded tape discomfort and flapping between tape layers).
3. The belt retracting and unwinding device is located at the rear of the tensioning winch. It consists of a frame, an aligning roller, a reducer, a motor, a rotating rod, etc. Its function is to replenish the belt to the conveyor. On the fuselage or removed from the conveyor fuselage, a rotating rod is installed at both ends and the rear end of the frame, which is used to clamp the main tape when adding or removing the tape, and the self-aligning roller set is used for the roll retraction and retraction. The tape is guided when working. When working, push the reel into one end of the frame and lift it up with the tailstock, and the other end against the top of the reducer output shaft. Start the motor to drive the reel through the dial of the reducer output shaft to rewind the tape. To release the tape, do not turn on the motor when releasing the tape and drag the drum from the outside to reverse. When not working, the movable rail can be hung on the frame with a pin to reduce the width. A lifting device should be set above the movable rail to suspend the drum. The width of the tunnel can be appropriately widened depending on the specific situation to facilitate the operation when the tape is collected.
4. The intermediate frame is composed of a fast detachable bracket without bolt connection, which is composed of H-shaped bracket, steel pipe, flat roller, hook-type trough roller, "V" type roller, etc. It is the machine The non-fixed part, the steel pipe can be used as the disassembled fuselage, fixed on the steel pipe with a pin, and can be moved with a small hammer. The hook type trough roller is glue-jointed type, the trough angle is 30°, and is hung on the steel pipe with a hook. The roller is hung on the pin through the arc tooth grooves on the hook and can be moved forward and backward to adjust the position of the roller to control the deviation of the belt.
5. Loading device and unloading device; the loading device is installed behind the retracting and unloading device, and is connected to the loading section through the steering guide. The transported materials are loaded from this section to the unloading section, and then unloaded. The material is unloaded by a set of inclined rollers in the unloading section. The unloading section is directly connected to the pole. The tail of the machine is composed of guide rails (I, II, III) and tail roller seats. One end of the guide rail is fixed on the middle support with bolts. , and is glued to the front end of another guide rail with a pin to adapt to the uneven bottom plate. The tail roller has the same structure as the roller in the tape storage device and can be interchanged. Its axis position can be adjusted with bolts to adjust the tape in the machine. If the tail is deflected, the front end of the tail drum is equipped with a coal scraper, which can scrape off the crushed or pulverized coal on the surface of the drum and collect it in the mud trough. It is taken out with a special mud puller. The tail is equipped with a buffer roller. The group, when receiving materials, can reduce the impact of lump coal on the belt, which is beneficial to extending the life of the belt.