Recently, the 2015 C-NCAP first batch of 17 models of the collision evaluation results were officially released, including Tianjin FAW Junpai D60, Guangqi Honda Binzhi, Chery Tiggo 5, Subaru Outback, FAW-Volkswagen Audi A3, Haima Auto Familia M5, Jac refine S3, GAC Toyota Rayling, Geely pride SUV, Dongfeng Yueda Kia K4, Dongfeng Peugeot 408, Changan Peugeot Citroen DS 6, SAIC MG GT, GAC passenger car Chuanqi GA6, Dongfeng Fengshen AX7, Mianyang Jinbeizhi There are 17 listed models, such as S30 and Guanzhi 3, involving 9 Chinese brands, 7 joint venture brands and 1 imported brand. It is worth noting that this is the last model to be evaluated according to the C-NCAP (2012 edition) rules. In order to avoid the stricter evaluation rules to be implemented from July 1 this year, the car companies will apply collectively, so this time. It is the one with the highest safety rating. Among the 17 models, except for the Jinbei Zhishang S30, which has received a 3-star rating, all of them have received five-star and above safety evaluations.
Slurry Pump is a broad pump a common concept, different geographical, habits, ultimately relates to the pump will be as. This entry describes the mud pump is the most of a pump, oil field drilling. The application of mud pump. In fact, the sewage pump, slurry pump and other non water pump and slurry pump also has a common name in. This entry is to the reader of the drilling mud pump.
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Summary
Mud pump, refers to the process of drilling in the drilling fluid to transport mud or water, such as washing fluid machinery. Mud pump is an important part of drilling equipment.
In the commonly used positive circulation drilling, it is the surface flushing medium - water, polymer mud or flushing fluid under pressure, through the high pressure hose, faucet and pipe column center hole sent straight drill bit at the bottom of the to to cool drill, cutting down the debris cleared and transported to the surface.
Common mud pump is a piston or plunger, by the power machine drives the crankshaft rotary pump crankshaft through the crosshead drive piston in the pump cylinder for reciprocating motion. Under the alternating action of the suction and the discharge valve, the purpose of the pressure feed and the circulating flushing liquid is realized.
classification
According to function
Single acting mud pump
In one cycle of the reciprocating motion of the piston, only one suction and drainage action is completed.
Double action type mud pump
In a cycle of reciprocating motion of the piston to complete the two suction and drainage action
pressure
Pump pressure depends on the depth of the hole, flushing fluid through the resistance of the channel and the nature of the transport of flushing fluid, etc.. The deeper the drill hole, the greater the resistance of the pipeline, the higher the pressure required.
With the change of the diameter and depth of the hole, the displacement of the pump can be adjusted at any time. A gear box or a hydraulic motor is arranged in the mechanism of the pump to adjust the speed of the hydraulic motor to achieve the purpose of changing the displacement. In order to accurately grasp the changes in the pump pressure and displacement, the mud pump to install flow meter and pressure gauge, and at any time so that staff understand the drilling pump delivery \ turn, while the pressure changes discriminant hole condition is normal in order to prevent the occurrence of accidents in the hole.
Product features
1, can transport high concentration and high viscosity <10000PaS and containing particles of suspended slurry.
2, conveying fluid flow stability, no flow, pulsation and mixing, shear slurry phenomenon.
3, discharge pressure and speed has nothing to do, low flow can also maintain a high discharge pressure.
4, the flow rate is proportional to the speed, through the variable speed mechanism or variable speed motor can realize the flow regulation.
5, self-priming ability, without bottom valve can be directly sucked liquid.
6, the pump can be reversed, the flow of liquid by the direction of the rotation of the pump to change, apply to the pipeline to reverse the direction of the occasion.
7, smooth operation, vibration, noise.
8, simple structure, easy disassembly and assembly.
Type I-1B pump concentration is widely used in chemical, pharmaceutical, brewing, papermaking, food etc..
Attention component
The liner of mud pump, mud pump, cylinder head, cylinder top sleeve rod,
Piston, piston plate, cup, piston, piston rod, piston rod, inlet and outlet valve, inlet and outlet valve seat, crosshead, crosshead sliding sleeve, crosshead pin shaft, crankshaft, connecting rod, connecting rod under the tile, connecting rod copper sets, connecting rod screw, a nut, a crown nut, skeleton oil seals, O - sealing ring, bearing and matching of gear, shaft etc. easily a quality problem, should be paid attention to in the purchase and use.
Matters needing attention
Before starting the mud pump, check the water inlet pipe, a water outlet pipe is blocked, from front to rear bearing grease filling, check the packing is full. Mud pump should be equipped with high-pressure water pump, will be greater than the pressure of slurry pump fresh water input to the leak proof packing, packing for protection, mud pump is not close flush pump. Otherwise, it will make rapid wear of seal parts. The gap between the Impeller and the guard board is reasonable, which has a great influence on the life of the mud pump. Clearance is unreasonable, pump running produce vibration and noise, over-current damage to parts quickly, and replacing the impeller, should pay attention to the gap to meet the requirements of the drawings, to adjust the clearance, the rear axle bearing body by the adjustment screw to. Mud pump allows the suction process is in the transport of water when the determination of the slurry should be taken into account the impact of mud on the suction capacity.
Slurry Pump Small Slurry Pump,Vertical Slurry Pump,Mining Slurry Pump,Submersible Slurry Pump Unisite Group Ltd. , http://www.unisitemarine.com
9 car companies voluntarily apply According to the reporter, the first batch of 17 models of the evaluation test began on January 6, 2015, and completed on April 17, according to the C-NCAP (2012 version) rules. Of the 17 models, 8 models use the special funds of the China Automotive Technology and Research Center, and the total cost of car purchases is about 7,627,800 yuan. The remaining nine are voluntary applications. However, according to the C-NCAP Management Center regulations, all voluntary models or centrally-designed models are purchased directly from the C-NCAP management centers to ensure the randomness of sampling.
From the evaluation results, 15 models received 5 stars, 1 model received 5 stars +, and 1 model only got 3 stars. Among them, 8 Chinese brand models have won 5 stars. From the perspective of scoring, many Chinese brand models are not safely lost to the same level of joint venture models. So far, the total number of C-NCAP evaluation models has reached 279, of which 107 models have been evaluated according to the 2012 edition of the C-NCAP management rules.
The stricter new rules will be implemented in July, "C-NCAP Management Rules (2015 Edition)", and the new rules will be implemented after July 1 this year. Compared with the 2012 version of the rules, the 2015 version of the rules not only improved and tightened the test details and whipping test scores, but also revised the star rating criteria, especially the 5-star threshold increased from 52 points to 54 points, 4 stars. The threshold was increased from 44 points to 48 points.
Since the driver's seat belt reminder and the child seat ISOFIX fixture have become the standard configuration of the regulations, the 2015 version of the rules no longer points to the two devices, the new rule total score from 62 points to 61 points, get high stars The difficulty of the grade evaluation has increased significantly. In addition, in order to more objectively reflect the representativeness of the evaluation model, the new version of the selection of the voluntary application evaluation model in the management program was changed from the original applicant's designated configuration to the model with the largest sales volume in the model market.
The reporter learned that because most of the collision models announced by C-NCAP were five-star ratings, to a certain extent, they reflected the importance of safety for car companies, but also caused the public to question whether the rules were too low. Therefore, the C-NCAP Management Center has developed a higher-level evaluation rule based on international standards and based on Chinese characteristics, and some scores are even higher than the international level. The implementation of the new C-NCAP rules is definitely good news for consumers, and the 5 star acquisition is more difficult to force automakers to continuously improve the safety of vehicles. 