Common sense of driving safety of mixer 1. What problems should be paid attention to when the second-hand mixer is driving?
Pay attention to safety: the vehicle is tall, large and has many dead angles, so slow down when reversing and turning. Many rollover accidents and collision accidents occurred at this time.
Reasonable operation:
1, mixer should pay attention to fuel saving, good driving habits can make you leave four figures of gas money every month;
2. The driving mode of the mixer chassis is different from that of the car. New drivers should ask the old drivers for driving skills, otherwise the clutch plates will burn out, not to mention the quality of the vehicle, which is very embarrassing.
3. When using the top of the mixer, pay attention to the smoothness of the positive and negative conversion direction, and the operation action should be smooth. The rotation of the mixing drum itself has inertia, which will bring great impact and increase the risk of weld cracking in steel structure.
Vehicle maintenance:
1. Take a good look at the operating instructions of the mixer. The instruction manual of our Huajian mixer indicates all the parts that need to be lubricated with butter regularly, the labels of engine oil and hydraulic oil and the replacement period, which should be observed.
2. The maintenance cycle of vehicle chassis should be strictly implemented, and regular manufacturers will ask for regular maintenance. If the customer fails to strictly implement it, or the parts are replaced in other repair shops, and then the vehicle is lost, the claim will not be paid.
3. Wash the outer surface and inner cavity of the tank carefully after using the car every day, otherwise your car will be loaded with less and less things after the concrete is solidified. In addition to cleaning up the residual materials, it is also necessary to clean up vehicles such as supporting wheels and roller tables. There are often stone residues, which will reduce the normal service life of your steel structure over time. Accident treatment: Except for concrete, other treatment methods of mixer are common vehicles, so I won't talk about it. In actual use, the vehicle will roll over or the mixing drum will stop running. At this time, we must find a way to drain the concrete, otherwise the mixing drum will be scrapped, tens of thousands. So write down the phone number of the manufacturer after sale. The most common method is to open a good mixer on the side, and then short-circuit the hydraulic components on the broken car, that is, use the hydraulic components on the car to drive the mixing drum on the parked car, drain the material first, and then repair it separately.
The main function of the soil mixer is to transport the concrete or mortar mixed in the concrete mixer to the construction site; Because the mixing tank of the concrete mixer can be rotated and stirred at variable speed, the concrete can be transported by the mixer, which ensures that it will not be separated within a specified distance and time, and the coarse aggregate will not settle, thus maintaining good workability; Concrete mixers are mostly used in commercial mixing stations and large-scale projects. They must be equipped with an elevated mixing station (machine) to allow tankers to pass freely and accept materials. In addition, the concrete mixer has another purpose, that is, it can transport the same amount of water as the loaded concrete.
The driving of cement mixer is a very important link. Proper operation can prolong the service life of the vehicle and avoid safety accidents. Here are some suggestions for you on the following issues:
1, the driving mode of the mixer chassis is different from that of a car. The new driver must ask the old driver for driving skills, otherwise the clutch plate will be burned out, and it is not the quality of the vehicle, but the improper operation.
2. When using the top of the mixer, pay attention to the smoothness of the positive and negative conversion direction, and the operation action should be smooth. The rotation of the mixing drum itself has inertia, which will bring great impact and increase the risk of weld cracking in steel structure. It is also the wrong operation method, so be careful.
3. It is very important to pay attention to fuel saving when the mixer is driving. Good driving habits can save you a lot of money every month.
2. What are the precautions for opening a concrete mixer?
Starting from the lowest gear, you can shift gears as long as you hear the engine effortlessly.
Two gears, the lowest gear is used for long slopes. Semi-suspended cab suspension, shock-absorbing seats, fluorescent lighting, air conditioning and other configurations are convenient and practical, reflecting humanistic care.
Two steps, upper and lower handrails, and 90-degree door opening angle, which is convenient for drivers and passengers to get on and off. Forward-leaning cab front mask, with a forward-leaning angle of 55 degrees, is convenient for daily maintenance, chassis inspection and maintenance.
Note: The pressure of the hydraulic system shall conform to the specifications and shall not be adjusted at will. The oil quality and quantity of hydraulic oil should meet the original requirements.
Before loading the concrete mixer, the residual water and sundries in the mixing drum should be drained first. Keep rotating during transportation to prevent concrete segregation.
Before the concrete mixing truck arrives at the construction site for unloading, the mixing drum should run at full speed at 14- 18 rpm 1-2 minutes, and then reverse unloading. Before reversing, the mixing drum should be stopped.
When the ambient temperature is higher than +25 degrees Celsius, the duration from loading, transportation to unloading shall not exceed 60 minutes, and when the ambient temperature is lower than +25 degrees Celsius, the above time shall not exceed 90 minutes. Winter construction should be done seriously: check whether it is frozen before starting; After the work, carefully remove the residual water in the mixing drum and water supply system, turn off the water pump switch and put the control handle in the stop position.
After unloading at the construction site, the place such as the feed hopper, the discharge hopper and the discharge chute should be washed immediately with the hose provided by the mixer truck to remove the sludge and concrete adhered to the vehicle body. On the way back to the mixing station, water of 150-200 L should be injected into the mixing drum to clean the concrete residue stuck on the drum wall and blades.
Every day after work, the driver is responsible for injecting clean water into the mixing drum and rotating it at high speed (14- 18 rpm) for 5- 10 minutes, and then discharging the water to ensure the cleanliness of the drum. When cleaning all parts of the mixing drum with high-pressure water, attention should be paid to avoiding instruments and joysticks.
The distance between the pressure water gun and the paint surface of the car body shall not be less than 40 cm. When cleaning the dirt and residual concrete slag inside and outside the mixing drum, and when the mechanic enters the drum for maintenance and welding repair, the automobile engine must be turned off first, so that the mixing drum stops running completely.
When the mechanic enters the cylinder to work, he must ensure that the mixing cylinder is well ventilated, the air is fresh, there is no gas and harmful dust, and the oxygen supply is sufficient (pure oxygen is not allowed). When using electric tools in the cylinder, the operator must have good insulation protection.
When working, it is forbidden to put your hand into the rotating mixing drum, and it is forbidden to put your hand into the joint of the main discharge chute and the extended discharge chute to avoid accidents. Check the abrasion of mixing blades regularly, and repair and replace them in time.
Implement all relevant safety operation specifications. The driver of the concrete mixer must receive professional training, and those without a license are not allowed to operate at their posts.
Small mixer trucks can be widely used in mines, tunnels, towns, villages, urban roads, water conservancy projects, large-scale projects, short-term and small-scale projects, micro-scale mixing stations, subways, national defense and other projects. It is limited, wide and long, and has the characteristics of narrow body, short wheelbase, small turning radius, strong flexibility and high efficiency.
3. What are the requirements of the concrete mixer driver?
The driver's license should use B2 certificate, and the qualification certificate can be transported as ordinary goods without special vehicle qualification certificate.
Responsibilities of concrete mixer driver
1, familiar with the performance of concrete mixer, must hold relevant certificates, and are not allowed to drink before work.
It is forbidden to work after drinking to ensure driving safety.
2. Before each shift change, check whether the instrument and engine oil in the car are normal and sufficient, and brake.
Whether it is intact, whether the stirring tank is kept clean, whether there is water left, etc. It is forbidden to drive with illness.
3, before transportation, should check the sealing of mixing tank, transportation process, the vehicle should be
Driving at a constant speed, when the vehicle turns, it should slow down in advance; It is forbidden to add water to the tank, and it should be controlled within one hour from the first plate loading to the start of unloading.
4. Strictly follow the driving route to ensure driving safety.
5, concrete mixer car body surface should be kept clean before leaving the station, pay attention to when leaving the station.
Traffic rules should be observed during transportation, and the transportation to the pouring site should obey the command, and the parking position should be appropriate and safe, which can meet the construction requirements; After arriving at the construction site, it is forbidden to stop and turn off the engine.
6. Obey the dispatching of station dispatcher and field service personnel.
4. The operation knowledge and daily maintenance knowledge of concrete mixer.
This paper briefly introduces the 8~ 14 cubic meter mixer which is very common in China at present.
1. function
It is mainly used for transporting concrete to ensure that the transported concrete does not segregate.
2. Structure
It consists of chassis, hydraulic transmission system (hydraulic pump, hydraulic motor), reducer, operating system, feeding and discharging system, mixing drum, ladder, lamps, protection and so on.
3. Working principle
Take power from the engine power take-off and drive the hydraulic pump to work through the transmission shaft. The hydraulic pump drives the hydraulic motor to rotate, and the reducer drives the mixing drum to rotate.
The control system controls the rotational speed and steering of the mixing drum by adjusting the flow rate and direction of the hydraulic pump. So as to realize the functions of feeding and discharging, transportation and stirring. Normal operation of concrete mixer: 1. Feeding and mixing of ready-mixed concrete: when the engine is idling, turn the operating handle to the "high speed" position of "feeding and mixing"; A. Mixing of ready-mixed concrete and operation of mixer truck: turn the operating handle to the "mixing" position; Before the mixer truck runs, the flexible shaft control handle in the cab must be lifted to the locking position; B. Unlock: Push the operating handle to the "feeding and stirring" side. If operating in the cab, it can be unlocked by pulling out the handle from the locked position; C. Stop the rotation of the mixing drum: put the operating handle in the "neutral" position. Note: No matter whether the operating handle is turned from the feed side to the discharge side or from the discharge side to the feed side, it must stay in the middle position for a period of time, and can not be turned to the next operating position until the drum stops rotating. Before feeding, check whether there is water in the mixing drum. If there is water, control the engine speed at 700- 1000 rpm, and turn the joystick to the drain position to drain the water. 2. Ready-mixed concrete: a. First inject 2/3 of the total water; B, sending 1/2 coarse aggregate, 1/2 sand and all cement into the mixing drum in turn, and then sending the remaining 1/2 coarse aggregate and water into the mixing drum; C. Rotating speed of mixing drum and mixing time "Rotating speed of mixing drum during feeding: 6-10 rpm; When stirring, the rotating speed of the mixing drum is 6-65438 00 rpm; Stirring time:10-16 minutes. E, after mixing, the mixing and discharging methods are the same as above. 3. Water supply operation: water is supplied by the water pump: a. First, turn on the rocker switch of the water pump in the cab, and then turn on the buzzer switch to make the water pump work, and at the same time, the buzzer sounds; B, when adding water to the mixing drum or flushing the hopper tank, open the "hopper" valve; C, when flushing the discharge chute, open the chute valve; D, when washing the car body, first open the valve of the water gun, and then directly use the rear water gun; Pneumatic water supply: ① Turn on the cab air supply switch first, and then turn on the manual air supply switch of the water supply system when the pressure gauge of the main vehicle reaches 8kg/cm2, and it can work when the pressure gauge reaches 2 kg/cm2. (2) When adding water into the mixing drum and flushing the hopper tank and the discharge tank, first open the valve at the bottom of the water tank, and then open the "hopper" valve. (3) When cleaning the car body, first open the valve at the bottom of the water tank, and then directly use the after-cleaning device. 4. Device drive: once the hydraulic pump fails, it can be driven according to the following emergency drive steps: a. Turn over the emergency drive hose (emergency hose); B, shut down the faulty vehicle (driven vehicle) and remove the high-pressure oil pipe connector on the hydraulic motor; C. Shut down the faulty vehicle (running vehicle), remove the high-pressure oil pipe connector of its hydraulic motor and connect it with the corresponding connector hose of the hydraulic motor on the faulty vehicle; D, start the rescue vehicle, and turn the control handle to the unloading position, so that the concrete in the faulty vehicle can be unloaded; After the emergency driving is completed, remove the rescue hose and restore the two cars to their original state. There are several points to be noted in the operation. Before the operation of the concrete mixer, it is necessary to check whether the steering, braking, lighting and signal systems are sensitive and effective, the drum and chute of the mixer are free from cracks and serious damage, the abrasion of the mixing blades is within the normal range, and the U-bolt connection between the chassis and the subframe is good. 2, understand the construction requirements and site conditions. Select the driving route and parking place. & lt/FONT & gt； You must obey the traffic rules when driving on social roads. The turning radius shall meet the requirements of the instruction manual, and the speed shall not be greater than15 km/h. The pit stop speed shall not exceed 5 kilometers per hour. & lt/FONT & gt； 4, homework, it is forbidden to touch the drum and drum by hand.
5. When the concrete mixer is reversing and discharging, you must obey the command, pay attention to the people around you, and stop immediately if it is abnormal. 6. It is forbidden to clean the concrete mixer under the high voltage line. Daily maintenance Because concrete will solidify into hard blocks in a short time, which is corrosive to steel bars and paint, the concrete adhered to the concrete storage tank and water inlet and outlet should be washed clean after each use. These include:
A. Wash the feed inlet with water before each loading to keep the feed inlet moist during loading;
B) When loading, fill the cleaning water tank with water;
C, after charging, flushing the feed inlet to remove the residual concrete near the feed inlet;
D, after discharging at the construction site, flushing the discharging tank, and then adding 30-40 L of cleaning water into the concrete storage tank; When the vehicle returns, keep the concrete storage tank rotating slowly forward;
E. Remember to drain the sewage in the concrete storage tank before the next loading;
F at the end of each day, thoroughly clean the concrete storage tank and around the inlet and outlet to ensure that there is no cement and concrete caking.
5. Matters needing attention in the use of concrete mixer
Li Cheng, Hubei Province reminds all riders that in order to drive safely, they should check before driving every time.
There are three kinds of inspections before driving: daily inspection, weekly inspection and monthly inspection:
1. Items checked once a day
(1) Working states of various indicator lights and instruments.
(2) the working condition of the lighting device.
(3) Working conditions of horn and repeater signal lights.
(4) Working conditions of wipers and washers.
(5) Fuel quantity in the fuel tank.
(6) Condition of doors, locks and mirrors.
(7) The color of the tail gas.
(8) The degree of tension of the fan belt.
(9) Working condition of steering mechanism.
(10) Clutch pedal clearance.
(1 1) Stroke of the brake lever of the manual brake.
2. Items checked once a week
(1) Engine oil level and its cleanliness (2) Engine coolant level.
(3) Brake fluid level.
(4) windshield washer fluid level.
3. Items checked once a month
(1) Tension of V-belt.
(2) Battery electrolyte level.
(3) Tire pressure and tire wear.
(4) Free travel of the steering wheel.
(5) The working condition of the brake.
(6) Whether the accelerator pedal is brisk.