Pipeline cleaners must be careful when driving through tunnels
Before driving to the tunnel, the pipeline cleaning vehicle should always pay attention to the surrounding traffic signs, especially the speed limit signs. When the vehicle travels from the entrance to the tunnel, the eyes will probably have an adaptation period of seven to eight seconds. Therefore, at this time, the driver of the pipeline cleaning vehicle will suddenly feel uncomfortable vision and should gradually slow down. . The length of the tunnel is not the same, and some of the first half of the tunnel is uphill, while the latter half is downhill. Because of the design of the longitudinal slope structure, the average speed of the vehicle when driving out of the tunnel should be Must be higher than the average speed of entry. In addition, in the tunnel at night, because the tunnel is equipped with lighting devices, the light in the tunnel is stronger than the outside of the tunnel. The driver of the vehicle should not choose to increase the speed because of this. When driving in a tunnel, you must not arbitrarily determine the speed with your own intuition. Be sure to pass the speedometer to determine the speed of your journey. You also need to be aware of the distance between vehicles. Because all levels of road tunnels are narrower than the distance outside the tunnel, especially those where the shoulder width is designed with the smallest basic width. Therefore, when the pipeline cleaning vehicle is driving into the tunnel, it is not allowed to park it in the tunnel to avoid traffic congestion. If there is a situation where the car is anchored, it is necessary to find ways to pull the vehicle out of the tunnel. Do not park the car in the tunnel for maintenance. When driving a vehicle to a tunnel, the driver of the pipeline cleaning vehicle should pay attention to observing the traffic signs and elevations of the front standard of the tunnel, and also need to pay attention to changes in the traffic signs while driving. When you get out of the tunnel, you should slow down. Because each tunnel has different facilities, different visibility, different widths, and different lengths, there is a process of brightness change in and out of the tunnel. Tunnels usually have white and dark nights, so in order to better and faster adapt to the environment in the tunnel, it is necessary to slow down, and half of the deceleration ranges from 40 to 20 percent. Some tunnels that pass through the mountain will be relatively damp, and the adhesion coefficient in the tunnel will also be reduced. This will have some adverse effects on the brake belt of the vehicle. In the tunnel, there is not only poor illumination of natural light. Some tunnels are mixed lanes except highways and graded highways. Motorized vehicles, non-motorized vehicles and even pedestrians can pass through tunnels. So, whether in day or night, before entering the tunnel, the front lights should be turned on in advance. The pipeline cleaning vehicle was driving into the tunnel and no sudden turnaround, parking, overtaking, or reversing occurred. When driving in front of a vehicle in a tunnel, it is necessary to increase a vertical safety distance between vehicles so as to avoid the occurrence of rear-end collisions. When driving out of the tunnel, notice that there is a blind spot of sight at both ends of the exit of the tunnel to avoid sudden pedestrians and other situations at the exit of the tunnel. (Text / Sun Ni) The upper part of the bit body is a threaded connection core tube, the side of the bit body is provided with a water tank, and the bottom lip surface is also provided with a water nozzle. Both the sink and the nozzle ensure the circulation of the rinsing liquid, which eliminates the role of rock powder and cooling the drill bit. In order to increase the clearance when drilling the clay layer and the shale formation, the ribs are welded to the inner and outer sidewalls of the hard alloy drill bit, which is called a rib type drill. A needle-shaped carbide self-grinding drill can be used for a hard layer having high abrasiveness. Generally, hard alloy drill bits are drilled into rock formations of grade II-VII; needle-shaped carbide drills can be drilled into VI-VIII grade rock. Drill Bit,Drill Bit Machining,Drill Machining Parts,Drill Bit For Jack Hammer Chongqing Jin Te Rui Machine Co.,Ltd , https://www.cncjtr.com