Eight, the old machine "single change double, single change more" to pay attention to matters
1. The old machine to be retrofitted should have good performance when the technical condition is normal. For example, the old machine with inherently insufficient performance should be carefully carried out.
2, the performance of the old saw machine after years of use, the general performance has changed, especially the guide rail and spindle box should be carefully checked. The restoration and transformation work should be carried out simultaneously during the transformation.
3, the power of the old saw machine is mostly between 22 ~ 30kW, generally can be changed to 1 large 1 small or 2 large 2 small saw blade for sawing. If it is possible to change the 22kW or 30kW class 6 motor of the original machine to a class 4 motor, the motor power is the same as the original machine, but the motor speed is increased by one third. At the same time, it must be equipped with a reduction gear box to reduce the required shaft speed after deceleration. The reduction gearbox also plays a role in increasing the torque of the cutter shaft while reducing the speed. This allows more blades to be configured and the operating current of the motor does not increase and is generally reduced. For example, our modified gantry saw machine, equipped with a 22kW class 4 motor and a reduction gearbox, can hold 4 to 5 pieces of 1.2m saw blades or 2 large 2 small saw blades, and the sawing current is mostly within 30A. If it is changed to 30kW class 4 motor and corresponding gear box, the saw machine can be equipped with 8 pieces of 1.2m saw blade or 3 big 3 small saw blades, and the sawing current is between 30~40A. Such a modification does not cost much, but it can have the dual effect of improving efficiency and energy saving.
4. After the sawing machine is changed to multiple knives, in addition to the outer end of the arbor, the outer end of the arbor must be lengthened accordingly, and special attention should be paid to the change of the counterweight. After the multi-blade is installed, the weight of the overhang on the cutter shaft is increased, and the sawing reaction force of the upper top is also increased. If the topping force is greater than the weight of the entire slip-box, the slipper box is placed off the rail surface. Losing the guiding effect, when it is serious, it cannot be sawed normally. At this time, if the weight of the following pressure is not related to the reaction force of the top, the anti-over-roller can be appropriately adjusted to prevent the top from coming off. If the two opposing forces are too different, the weight of the lower pressure should be increased to balance.
5. The increase of the counterweight should be different according to the position of the V-groove (guide groove) of the gantry saw beam guide rail, such as V-shaped guide rail * near saw blade, flat guide rail * near pulley (away from the saw blade). Such a rail arrangement is particularly sensitive to the topping force, and should be mainly to increase the configuration of the saw blade end, such as cementing the cement in the knife cover. If the V-shaped groove is far away from the saw blade end (* near the pulley), when the saw blade is increased, the downward pressure generated by the overhanging weight of the cutter shaft is much larger than the upper top force of the sawing, and the slider of the V-shaped guide rail (the slide box) ) Upturned and affected. At this time, the added weight should be added to the * pulley. We rotate the motor on the slide box 180° horizontally and arrange it outside the slide box to achieve a good balance. If the front weight is too light after the motor is moved out, you can add weight or partially grout cement to the knife cover as needed. After the saw blade is added, the weight reconfiguration is a crucial issue.
Previous page
Disposable serological pipettes with polyester fiber plugs are ideal for tissue culture applications. Crisp, black, highly legible permanent graduations prevent ambiguity and guarantee precise reading and accurate dispensing within ± 2%. Reverse graduations show volume removed or remaining on all pipettes larger than 1mL. Generous negative graduations provide additional pipetting volume. Yongyue's serological pipettes are made from transparent USP Class VI polystyrene sterilized by gamma irradiation. Each lot is free from pyrogens, DNases, and RNases.Yongyue's plastic serological pipettes are produced under the strictest protocols and offer the highest degree of accuracy.
The pipettes are supplied with an aerosol barrier plug that prevents both liquid and aerosols from contaminating the pipettors.
The serological pipettes are produced from crystal clear polystyrene (PS) and are color coded for easy volume identification. Available in 1mL, 2mL, 5mL, 10mL, 25mL and 50mL sizes.
In addition each Pipette now features:
Crisp and bold easy-to-read graduation marks
Reverse graduations on all volumes
Negative graduations on all volumes
1, 2 and 5mL pipettes feature one-piece construction
10, 25 and 50mL pipettes feature three-piece construction
1 ml Serological Pipette,50 ml Serological Pipette,10 ml Serological Pipette,5 ml Serological Pipette,25 ml Serological Pipette,Serological Pipette 2ml
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yymeds.com