(1) Optical instruments The various microscopes, photomicrography devices, photographic amplifying devices, and polarimeters are the most important words to protect lenses and lenses from damage and mildew. When the lens or lens is dirty, wipe it gently with a mirror paper, avoid using coarse cloth, plain paper, or wipe directly by hand. Even infrequently used optical instruments should be cleaned regularly with a cleaning agent (95% B* + 5% anhydrous B*), and lenses and eyepieces that are not commonly used should be kept in the dryer. The entire body is best placed inside the airtight glass or plexiglass frame cui, well put in the frame dry agent (such as color change silica gel), in addition, the failure of dry desiccant should be promptly exchanged.
(2) The photoelectric instrument performs all types of photoelectric colorimeter, illumination meter, electronic automatic particle counting instrument, light meter, etc., and is characterized by the protection of the life of the photocell. The life of photocells is shortened with the increase in the time and the degree of absorption of light. Therefore, when not in use, the photocell's light receiving port should be immediately covered with shading. In addition, damage to the instrument must be prevented by a short circuit, high voltage, and high current.
(C) The main point of electronic instrument maintenance is to make the original voltage stable. When operating, pay attention to the safe range of voltage and current. The electron tube instrument must also be energized and actuated frequently to prevent malfunctions such as mold-breaking and disconnection.
(D) The maintenance of various analytical balances and torque balances of street furniture, the most important is to pay attention to four defenses, moisture, hand touch, shock and knife edge damage. Moisture and touch will affect sensitivity and accuracy. Analytical balances should be placed in a sealed box with dry agent. It is forbidden to take the weight directly with your hand and touch the balance components by hand.
(e) Centrifuge centrifuge maintenance is the main requirement is to protect the motor and its main shaft is not deformed. Therefore, the fuselage should be installed stably and firmly, and the level must be checked. The symmetry of the two symmetrical centrifuge tubes and their centrifugation must be equal, and they must be accurately weighed. In this way, it will not cause the motor shaft to bend and deform due to deflection and cause the entire centrifuge to be scrapped. The two axes of the motor of the centrifuge must be refueled periodically to maintain lubrication, and the speed should be gradually increased and gradually reduced.
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Split set bolt is also called "Split Set Stabilizer". It was successfully developed by American Professor Scott in the early 1970s. It was used as a patented product by Ingersoll Rand for mining support. In the early 1980s, the Beijing Institute of Well Construction conducted exploratory tests on slotted pipe anchors in the laboratory and achieved good results. Later, it was gradually promoted and applied in the coal system.
Split set bolt is a underground mining support product. It has simple installation process and convenient use. It has strong anchoring force and tensile strength in underground mining and shotcrete support. It has Large force, strong expansion force.
Split set bolt has good supporting effect. Bolt support conforms to modern rock mechanics and surrounding rock control theory in terms of support principles, and belongs to active support. After the bolt is installed, the stability of the surrounding rock can be mobilized and utilized, and the bearing capacity of the surrounding rock can be fully utilized, and controls the deformation of the surrounding rock of the roadway effectively.so split set bolt can protect the stability of the surrounding rock of the roadway and improve the maintenance of the roadway.
Split set bolt has simple installation and labor saving. It uses fewer supporting materials and lighter weight than other bolts. When tunneling, the transportation volume of supporting materials is reduced, and the labor intensity is greatly reduced, which is conducive to improving the efficiency of tunneling.
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