2. The equipment is idle due to process change and can no longer be put into use.
3. The equipment has no maintenance value, and the maintenance value is too high.
4. Due to damage or other reasons, the equipment does not meet the safety operation specifications.
Question 2: There are too many reasons for applying for scrapping fixed assets. Almost all fixed assets can be scrapped for the following reasons:
Too long service life, loss of function, complete loss of use value, or inability to use, no repair value;
The product is backward in technology, poor in quality, high in energy consumption and low in efficiency, which has been eliminated and is not suitable for further use, or the technical indicators do not meet the requirements for use;
Seriously damaged, beyond repair
Serious damage, although it can be repaired, but the cumulative repair cost is close to or exceeds the market value;
The main accessories are damaged beyond repair, but they can still be used and partially scrapped;
Question 3: How to write the reason for equipment scrapping? The equipment has exceeded its service life and has no further use value.
Question 4: What are the reasons for the scrapping of electronic products? There are many reasons: aging of components, damage of components, high-pressure burning loss, increased energy consumption and so on.
Question 5: How to write the reason of equipment scrapping! From the perspective of security risks, serious is enough. For example, in Beijing, a woman was injured and eventually died because of poor equipment maintenance of a heating company. At present, she has paid 500,000 yuan and has not stopped.
Question 6: What is the main cause of equipment failure? 1.
Equipment also has life phenomena. It will die after being used to a certain extent. If you want to repair it, you must update it. This is most obvious in high-precision equipment.
The wear and tear of equipment can be divided into tangible wear and intangible wear.
Visible wear refers to the physical and chemical changes caused by material wear or natural environment erosion of equipment in use.
Intangible loss means that the use value of equipment is reduced or even eliminated due to the progress of science and technology.
2. Caused by abnormal operation.
Almost all devices have strict requirements on the action sequence. You can't operate at will, and if you don't follow the operating rules, it will only directly lead to or accelerate its failure. In the field management activities, the most direct "killer" is the unskilled newcomer, wrong operation and setting.
3. Illegally changing its function.
If this function is hidden in the design of the equipment, I'm afraid it's not a big problem to transform it. I'm afraid that if it doesn't have this function, it will kill the equipment.
4. Overloaded use.
People stop, 24 hours a day, 365 days a year, and will not stop until they collapse; If it's not broken, don't fix it, and hurry to turn over the books. This is a typical "cottage factory" equipment use. Although some equipment can't see any faults temporarily under overload condition, overload operation makes the combined equipment tired, the aging and wear process is greatly accelerated, and finally the service life is shortened.
5. Potential unfavorable factors in design.
At the end of the design, the related matters were fully discussed and put into operation in a hurry, which led to many failures in the use stage, so the second patch design and the third patch design were carried out ..... and it was too late to finalize the design. This kind of equipment is unsafe to use.
6. Poor maintenance technology.
First-class equipment, second-class operation and third-class maintenance. Don't treat the equipment as "people", just call it work, don't give "rice" to eat, and don't even do the most basic cleaning, so that small faults gradually evolve into big faults.
Question 7: What are the common causes of motor scrapping? Common faults and causes of motor
(1) symptom: the motor can't start, and there is no sound. Cause: ① The fuse is blown. ② The starter trips. (3) The power supply is dead.
(2) Failure phenomenon: the motor can't start, and there is a buzz. Cause: ① One phase of power cord is broken, or one phase of fuse is blown, or one phase of motor winding is broken. ② The air gap between stator and rotor is abnormal, which leads to the collision between stator and rotor. ③ Bearing damage. (4) Being stuck by machinery.
(3) Fault phenomenon: the fuse is blown when the motor is started. Reason: ① The stator coils are connected in opposite directions. ② The stator coil is short-circuited or grounded. ③ Bearing damage. ④ The drive belt is too tight. ⑤ Stuck by the driven machinery. ⑥ Misoperation during startup.
(4) Fault phenomenon: the motor speed is low after starting. Reason: ① The power supply voltage is too low. ② Connect the motor into a star shape with triangle connection. ③ The stator coil is short-circuited. ④ The rotor short-circuit ring and cage bars are broken or welded. ⑤ Motor overload.
(5) Fault phenomenon: the motor temperature is too high, but the current does not exceed the rated value. Cause: ① The ambient temperature is too high. ② The ventilation pipe of the motor is blocked. ③ Excessive sludge and dust in the motor will affect heat dissipation.
(6) Fault phenomenon: the motor explodes during operation. Cause: ① The coil is temporarily grounded. ② The coil is temporarily short-circuited.
China power/article/ 1020/art 1020 1 13 . ASP
Common faults and causes of motor
1. Motor overheating
1), the power supply causes the motor to overheat.
As far as the power supply is concerned, the motor is overheated for several reasons:
A, the power supply voltage is too high
When the power supply voltage is too high, the back electromotive force, magnetic flux and magnetic flux density of the motor will increase. Because the iron loss is proportional to the square of the magnetic flux density, the iron loss increases, leading to overheating of the core. The increase of magnetic flux leads to the sharp increase of excitation current component, which leads to the increase of stator winding 1 copper loss and overheating of winding. Therefore, when the power supply voltage exceeds the rated voltage of the motor, it will overheat the motor.
B, the power supply voltage is too low
When the power supply voltage is too low, if the electromagnetic torque of the motor remains unchanged, the magnetic flux will decrease, the rotor current will increase correspondingly, and the load power supply component in the stator current will also increase correspondingly, resulting in an increase in winding copper loss and overheating of the stator and rotor windings.
C, power supply voltage asymmetry
When one phase of the power line is broken, the fuse of one phase is blown, or the corner of the starting equipment of the knife is burnt out, the three-phase motor will go to single phase, which will lead to overheating of the two-phase winding in operation and even burning out through large current.
D, unbalanced three-phase power supply
When the three-phase power supply is unbalanced, the three-phase current of the motor will be unbalanced and the winding will overheat.
As can be seen from the above, when the motor is overheated, the power supply should be considered first. After confirming that there is nothing wrong with the power supply, consider other factors.
2), the cause of the motor overheating load.
As far as the load is concerned, the motor is overheated for several reasons:
A, motor overload operation
When the equipment is not matched and the load power of the motor is greater than the rated power of the motor, the motor will be overloaded for a long time (that is, a small horse-drawn cart), resulting in overheating of the motor. When repairing the overheated motor, we must first find out whether the load power is consistent with the motor power to prevent blind and aimless disassembly.
B, drag mechanical load work is not normal.
Although the equipment is matched, the mechanical load it drags does not work normally, and the load is sometimes large and sometimes small during operation. For example, the feeding amount of the thresher is too large, and the motor is overloaded and heated.
C, drag mechanical failure.
When the dragged machinery is out of order, inflexible or stuck, it will overload the motor and lead to overheating of the motor winding.
Therefore, the load factor cannot be ignored when overhauling the overheating of the motor.
3) The motor itself causes overheating.
The motor itself will overheat for the following reasons:
First, the motor winding is open
When one winding of the motor is broken, or a parallel branch is broken, it will lead to unbalanced three-phase current and overheat the motor.
B, motor winding short circuit
When >>
Question 8: What is the difference between scrapping fixed assets and reporting losses? Scrapping should be good performance, existing, outdated and useless. Loss reporting is caused by lost and damaged storage. Loss reporting refers to abnormal scrapping (loss reporting is also scrapping and consumption).
Question 9: What are the general reasons for the early retirement of fixed assets? Generally speaking, it may be:
1, due to technical progress and other reasons, machinery and equipment are updated, and old equipment is based on new production requirements and has no transfer value.
2. Damage to fixed assets caused by accidents.
3. The estimated service life is too long when it was originally recorded, which leads to the early retirement of fixed assets.
4. Affected by natural disasters. , leading to the early retirement of fixed assets.
5. When the factory is demolished, the original machinery and equipment are fixed on the surface and cannot be moved.
Wait a minute.
Question 10: How to write a request for scrapping some equipment in the factory in the equipment scrapping application report?
Headquarters:
Part of the existing equipment in Haiou Machinery Factory of Sanhuan Corporation is outdated, mainly including 90-door telephone semi-automatic switches in the office, Desheng brand 10-seat van in the logistics department, warehouse shed, rice steamer and 50-ton punch press in the production department. The above equipment has been repaired many times, but the effect is not good, and the cost of repeated maintenance is very high. Moreover, some devices have potential safety hazards and have no maintenance value. Therefore, the factory department decided to report the above equipment. I hereby ask for instructions, please approve!
Yangtze river Sanjiang sanhuan corporation seagull machinery factory
June 2009 65438+1October 65438+March
The answer is accompanied by a detailed equipment list: