Expansion Shaft

Advantages and applications of expansion shaft
Features: The convex key type air shaft main body is made of high-quality steel pipe, the surface is chrome-plated, the aluminum convex key is flexible and flexible; the high-quality rubber liner and the fast filling and exhausting nozzle are arranged, the sealing effect is good, the service life is long, the detachable shaft head is Easy to maintain. After inflation, the unilateral expansion height can reach 5mm to 6mm. For example, the diameter before expansion is 74mm to 75mm, and the diameter after expansion can reach 79mm to 82mm. The special expansion height is separately required. 3 inch key type inflatable shaft, usually using a coiled tube inner diameter of 76mm.
Applicable: The convex key type air expansion shaft expands from a single key bar, and the fulcrum spreads to each key bar to balance the force. It can be applied to articles with heavy mechanical load capacity, such as cloth, paper, film, printed matter, Leather, composite materials, etc., suitable for coating, slitting, printing, rewinding, compounding, paper making, bag making, plastics and other related machinery retractable reels, can effectively improve work efficiency

The requirements of the slat-type air-expansion shaft for the air-expansion nozzle, because the use of the air-expansion shaft has a relatively high requirement for gas pressure, so there are many requirements for the gas nozzle of the air-expansion shaft.
 
First of all, the sealing performance of the gas nozzle is good, and it can ensure that the gas nozzle is charged and discharged during the two-second inflation time of the inflation shaft. And it is the internal air pressure guarantee, otherwise it will not provide effective air pressure.
 
The quality of the second nozzle is good. Most of the nozzle materials use copper as the basic material. Because it is subjected to pressure of 3-4 atmospheres, the pressure resistance is also high and the production is convenient. Provide custom processing of the nozzle.
 
The use of the third air nozzle needs attention, the slat-type air expansion shaft company analysis, because as long as the gas-filling rod against the air-filled shaft can be a successful inflation of the air-expansion shaft, it is necessary to quickly charge and exhaust the air nozzle. Performance requirements are also relatively high.

Technique parameter

Safety inspection of the inflation shaft
(1) Understand the situation of the occurrence of the fault, understand the working conditions before the fault and the symptoms after the fault.
(2) Carefully analyze the cause or range of the air shaft failure, find the cause of the fault or analyze the scope of the fault.
(3) Examine the air-expansion shaft, mainly check whether the fixing screws and wiring screws of the fuses, relays, contactors and travel switches are loose? Is there a place for disconnection? Is there any money burning or contact welding? Is the activity of the electrical appliance flexible? and many more. Eliminate obvious faults in time.
(4) Power failure check, mainly to find hidden faults. Generally, use the resistance of the multimeter to check whether the components and circuits in the fault area have open circuit, short circuit or grounding. Sometimes it can be checked with a shaker and other devices. If the power failure check fails, the power check can be performed.
(5) Power-on inspection, mainly to find faults that are difficult to find. The power-on check should be carried out without load to avoid accidents.
 

Inflatable shaft leakage inspection and maintenance method

The user of the inflation shaft occasionally encounters a leaky appearance. You may be helpless about the leaking question. When you look at the repair plan of the book, but still can't handle it, let's give you one by one for this question. Better treatment plan.
Now that you want to find out why, you may want to open it manually to see the cause of the leak.
Before disassembling, first look at the structure diagram of the key-type gas-lifting shaft, and then perform manual operation. First press the air-inflating shaft inflation nozzle to release the compressed air in the air-up shaft, and then remove the aeration nozzle. Use a wire with a diameter of 1-1.2mm to pierce the small hole in the key strip along the circumferential direction of the gas rising axis, and set it in the same circumferential direction; tie all the key strips firmly. Avoid pulling out the air bag. The key strips fall into the roller and can also be easily installed. The set screw (M6 hexagonal screw) and the positioning sleeve of the fixed aluminum alloy roller and the gas-increasing shaft are taken out.
Need to process a screw for the pin puller, and clamp the gas up shaft on the lathe. Usually, the touch surface between the inflatable end of the key bar type gas rising shaft and the aluminum alloy roller is coated with sealant. First use a gas torch and heat it first. When heating, other parts should be cooled to avoid deformation of the aluminum alloy roll. After the sealant is softened, the end is pulled again. Since the airbag is connected with the inflation end, the airbag can be easily pulled out.

Packing

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