It is understood that the new version of the "Food Safety Law" will be implemented from October 1, 2015, using legal means to strongly promote the upgrade of the cold chain logistics industry. This requires the use of efficient and stable handling equipment in all links. The biggest difference between cold storage forklifts and ordinary forklifts is that frost and frost are the main problem when entering and leaving the warehouse and cold storage frequently.
Characteristics of cold storage environment
1. Divided into 4 kinds of cold storage according to the temperature range
High temperature storage L level +5 to -5 degrees Celsius, mainly used to store vegetables, eggs, medicinal materials, wood to keep fresh and dry;
Medium temperature D level -10 to -18 degrees Celsius, mainly used to store meat, aquatic 名媛直播 and other 名媛直播 suitable for this temperature;
Low-temperature warehouse J level -23 to -28 degrees Celsius, mainly used for ice-cream, ice cream and low-temperature food, etc .;
Ultra-low temperature storage Below -30 degrees Celsius, quick-frozen food, industrial, medical and other special purposes.
High-temperature storage does not require special cold storage forklifts, other cold storages need to use cold storage forklifts.
2. Working environment with extreme temperature and humidity changes
Especially in the south and the coast, the humidity in the outdoor environment is large, which causes the humidity in the charging area and loading and unloading area outside the cold storage to be much higher than that in the cold storage. When entering the charging area or the loading and unloading area, condensation and condensation water appear on the surface in a short time.
Hardware requirements for cold storage forklifts
Metal parts require special anti-rust treatment;
Rubber parts need to select low-temperature materials to ensure their working conditions at low temperatures;
The wheels are made of low-hardness polyurethane material with grooved surface to prevent slippage and sufficient load-bearing capacity. The hardness is generally 72SH;
Application characteristics of forklift in cold storage
1. Frequent entry and exit of cold storage to move goods
This mode of operation is suitable for operation of counterbalanced battery forklifts and battery hand-held pallet trucks. It is a common way of flat handling. It is the first choice for flat handling. It has low waterproof requirements for forklifts. Damaged parts) life is relatively longer.
2. Long-term handling of high-shelf stacking and unloading
Due to the different working characteristics, the task of the narrow-aisle stacker is to stack the goods transported into the cold storage on a high shelf, or pick up the goods from the high shelf to the ground, so it is continuously operating in the cold storage in use The time is relatively long.
3. Use of different grades of vehicles in different cold storage environments
-18 ° C refrigerated trucks shall not work for more than 1 hour in the cold storage above -18 ° C;
-30 ° C refrigerated trucks can be used in the -18 ° C cold storage, there is no time limit, the working time in the -18 ° C to -30 ° C cold storage should not exceed 15 minutes / hour;
-40 ° C refrigerated trucks can be used in the -18 ° C cold storage, there is no time limit. Working in the -18 ° C to -30 ° C cold storage is not allowed to operate for 3 hours. You must operate outside the cold storage for half an hour or rest for the same time. Working time in the cold storage at -40 ℃ shall not exceed 15 minutes / hour.
Influence of battery discharge characteristics on the use of cold storage vehicles
Due to the chemical characteristics of the battery, the freezing point of the electrolyte has a great relationship with the specific gravity. At low temperatures, the battery cannot discharge normal electricity.
1. Freezing point of electrolyte
The freezing point of sulfuric acid with a specific gravity of 1.13 is around -12 ℃
The freezing point of sulfuric acid with a specific gravity of 1.29 is around -60 ℃
Below zero, the battery can discharge less than 60% of the total capacity
2. Selection of batteries and precautions during use
Choose high-end brand batteries to ensure the use of forklifts and battery replacement time;
Try to keep the battery in a full state to ensure that the battery electrolyte has a high specific gravity;
The forklift and battery should be preheated before entering the cold storage;
Keep the battery surface dry and the battery liquid level high.
Precautions for the use of cold storage vehicles
All cold storage vehicles can not be shut down and parked in the cold storage, otherwise it may cause damage to the hydraulic system and electrical system;
Before entering the cold storage, all cold storage vehicles must perform hydraulic and walking actions until the temperature of each component rises and enter the cold storage;
According to different cold storage truck grades, operate in the cold storage according to standard sustainable working hours;
If there is condensation on the surface of the vehicle after leaving the warehouse, you must use dry or wait for the condensation to dry before entering the cold storage again;
Using special oil 名媛直播 for cold storage, regular maintenance and replacement;
Shorten the maintenance period of lubrication points to prevent early wear of lubrication points;
After the battery is discharged, it cannot be left empty for a long time. Charge it in time and maintain a high specific gravity of the electrolyte to prevent the battery electrolyte from freezing;
Cooperate with different models to improve the efficiency of various models in the cold storage;
When the vehicle fails in the cold storage, it must be removed from the cold storage as soon as possible and repaired in the buffer zone or maintenance area.
The cold storage type forklift is a special handling machine. Its use and maintenance methods are directly related to the service life of the forklift. Professional recommended models and the use of various models, professional maintenance and repair can ensure the effective utilization of cold storage type forklift Intact rate and service life.
