CN HDFM - Valve Information, Valve Technology

The hydraulic machinery to drive in the form of ZL series loaders, most equipped with shut-off valve switch (located in the cab on the dashboard.) We are in the process of maintenance on the loader, often found that the valve had been removed; Even still, by the operator to know, do not know how to apply, useless. The main reason is the cut-off valve connected to the loader chassis switch between the gas transmission system, it is often unclear awareness. In fact, normal application of cut-off valve switch, traffic safety for the protection of the loader, extended machine life and increase economic efficiency is very important. Must correctly grasp the function of shut-off valve switch, the use of time and use.

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Posted in Technical Literature |

RZF type automatically turn off household gas pipeline valve (referred to as the automatic valve) is used to protect the liquefied petroleum gas and natural gas, pipeline gas for domestic security, a new class of patent-specific valve. Automatic valve is a rod, valve cover, rubber bowl, ring, armature film, ring magnets and other components. Gas from the inlet into the valve chamber, due to magnetic force, is normally closed outlet, manual extraction of the valve opening rod, the valve outlet is opened, gas from the outlet through the valve chamber into the combustion gas appliance. At this point, the gas pressure is greater than magnetic force, the valve is normally open, automatic valves work properly. When the air stops gas, pipeline and valve chamber gas pressure dropped to less than the critical work of automatic pressure valve, the valve automatically closes. Two air supply, you must re-extract the bar (open valve), automatic valve to return to normal work. Thus avoiding the gas without stopping off for gas appliance valves, when gas supply when the air again, making a large number of gas spills, leading to gas poisoning or fire.

Standards and technical requirements based on business, I use two 0.2 50kPa pressure gauge micro, small air compressor (with tanks), regulators, stopwatch, hoses and other test system components, see below.

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Posted in Technical Literature | Tagged Automatic valve

Bottom ash LSAR50/50 factory rotary valve feeder (Finland births), mainly due to bottom ash storage in the bottom ash from the bottom discharge port. Bottom ash emission is divided into two systems: one is the dry ash disposal system, the rotary valve feeder bottom ash will be directly transported through the dust under the feed tube into the car, because the system is greater pollution emissions on the environment, under normal circumstances do not use; another is the wet ash disposal system, the rotary valve feeder bottom ash will spiral into the following humidifiers, bottom ash through the water to cool and reduce dust concentrations to achieve the purpose of environmental protection, therefore, work commonly used in wet ash disposal system.

LSAR50/50 rotary valve feeder speed 8r/min; motor 3kW, 380V, 1500r/min; by the sprocket, the device output to 50m³/h.

The feeder and put into operation a year later, circumstances arise in the normal load stall, and the problem is getting worse. Maintenance once every two weeks before, one week after the repair, sometimes twice. The reason there are two main aspects: First, the rotor and wheel wear, the relative gap increases, a large number from the end face of the rotor into the gray, so that the rotor and the wheel cover the face clearance Yi was filled with ash, causing the rotor rotational resistance increases , as well as equipment downtime, when the motor temperature is very high due to the load, could easily lead to motor burn. Second, following the spiral feeder humidifiers work, to be carried out on the water bottom ash, bottom ash as high temperature, part of the water vapor from the feeder into the feeder below the rotor and wheel hub cover the gap between the inside face, ash mixed with water vapor, in the case of high temperature friction and adhesion at both ends quickly agglomerate surface, the rotor resistance increases, as well as motor overload shutdown.

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Posted in Technical Literature | Tagged Rotary valve

My unit is a professional manufacturer of crankshaft. S1-130B, S1-247 is the processing of two plane main journal crankshaft connecting rod journal and the main production equipment, however, often appear in the production process bar knives, ranging from broken parts, while in the destruction machine, not only increase maintenance costs and the impact of production. Maintenance personnel find out cause of the malfunction is one-way trip throttle problem, but after valve repair or replacement, are not fundamentally solve the problem.

1. Failure Analysis

One-way trip is the role of cutting knife sets back the process in fast one-way valve to open, work feed off when the check valve, flow control orifice through the cam into the oil, in order to achieve the work feed; throttle Size is no problem from the mechanical control, which can only be a fault in the check valve seal. The circular form of check valve with steel ball, as both are rigid contact, frequent fatigue damage to the switch so that the orifice, sealing reduce accidents; while oil may be due to particle pollution, easily attached to the rigid contact of the seal surface, so that the one-way valve closed, it can lead to bar knife, causing the accident.

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Posted in Technical Literature | Tagged Check valve • Seal structure