Pre-installed piping

Pre-installed piping
1. Introduction pipeline
(1) two-director and branch pipes: From lubrication pump out until all the oil inlet distributor, relatively high under pressure. Usually cold drawn seamless steel pipe, the material is 10 or 15 gauge steel. Severe corrosion of the pipe must not be used;
(2) to the pipeline: from the distributor to all lubrication points out the inlet (bearing hole), under pressure is relatively low. Usually drawn copper, easy to bend when the pipe. There is also cold drawn seamless steel or stainless steel pipe;
(3) the use of hose high frequency online ups encountered active site connections.
2. The piping layout requirements
(1) pipeline to try to avoid the heat radiation and cooling water temperature is too high or too low, such as spraying of the Department, particularly hose fittings;
(2) piping and other equipment should not affect the operation of the host, to be safe, reliable, easy to work, observations, maintenance;
(3) To smooth vertical and horizontal piping, neat appearance. As little as possible, or small-angle bend elbows, using a large arc, thus reducing oil flow resistance;
When the conflict (4) installation occurs, a small tube let bassoon, low-pressure pipe so that high-pressure pipe;
(5) the pipeline can not be contacted at the intersecting should spaced;
(6) parallel pipe joints should be staggered installation, to avoid affecting the installation and removal;
(7) In order to facilitate disassembly pipeline cleaning, the union should be properly installed, but to use less, reducing the possibility of leaks.
3. Determine the length of the tube
(1) determined in accordance with 8.2 fixed piping path, the length of the tube was measured in the field, pay attention to the size of the bend radius of influence;
(2) make different types of pipe industrial ups system access after effects into account;
(3) to determine the length of the tube should be piecemeal, cut, pre-order to facilitate on-site adjusted according to actual situation, if all of a sudden cut off, the accumulated error occurs when the pipe is difficult;
(4) short pipe cut at all need to try to take advantage of the short tube where, if necessary, can be used to take a long straight pipe joints, joints should be less but not much on the tube segment.

 

The inverter is a DC to AC transformer, which in fact is the process of transforming a voltage inverter.

The three phase online ups is a DC to AC transformer, which in fact is the process of transforming a voltage inverter.
Converter is the grid AC voltage is converted to stable 12V DC output, and the output of the inverter is Adapter 12V DC voltage into a high voltage alternating current of high frequency; likewise two portions are used with more than a pulse width modulation (PWM) technique. At its core is an integrated PWM controller, Adapter using UC3842, the inverter is used TL5001 chips. TL5001 operating voltage range of 3.6 ~ 40V, has an internal error amplifier, a regulator, oscillator, with dead-controlled PWM generator, low-voltage protection circuit and short circuit protection circuits.
Input Interface parts: input part has three signals, 12V DC input VIN, work ENB enable voltage and current control signals Panel DIM. VIN provided by the Adapter, ENB voltage provided by the MCU on the motherboard, its value is 0 or 3V, when ENB = 0, the inverter does not work, and ENB = 3V, the inverter is in normal working condition; and DIM voltage provided by the motherboard, which ranges between 0 ~ 5V, the different values of feedback to the PWM controller DIM feedback terminal of the inverter to the load current will be different, the smaller the value of DIM, the inverter output current greater.

Hydraulic fittings standard

Hydraulic fittings standard
First, the assembly sleeve type pipe joints
(A) the most important part of pre-installed ① bite type pure sine wave online ups, the direct impact on the reliability of the seal. Generally require a dedicated pre-heater. Small diameter joints can be pre-installed on the vise. In practice, as a parent with a connector, the nut, ferrule can be pressed onto the tube. There are straight pipe joints card sets, card sets Straight turning heads, sleeve tee pipe emergency power ups and other types. I found that even in the same factory shipment, these types of connector body tapered hole depth is often not identical result is a leak, and this problem is often overlooked. The correct approach is to end what kind of pipe joint body, connecting the ends of the corresponding pre-installed with the same type of connector, which can maximize avoid leakage. ② pipe end should be flush. After sawing the pipe should be ground flush with the wheel and other tools, and deburring, cleaning with high pressure air blowing before use. ③ When preloaded, you should try to keep the coaxial tube and connector body, if the tube is too large will cause deflection seal failure. ④ preloaded force should not be too much of the inner edge of the ferrule just embedding the tube wall, card sets should not have significant deformation. During pipeline connection, then the provisions of the tightening force assembly. ф6-1 card sets tightening force of 64-1 15n, 16фmmr 259n, ф18mm to 450n. If at the time of pre-deformation serious bite, will lose seal.
(B) Prohibition adding sealant filler. It was sealed in order to achieve better results, put the card coated with sealant, sealant is the result into the hydraulic system, causing clogging of hydraulic components overcast Nigeria and other failures.
(C). When the connecting pipe, the tube should have sufficient deformation margin, to avoid that the tube is subjected to tensile force.
(D) When connecting pipe, it should be avoided by the lateral force, lateral force caused Mifengbuyan over the General Assembly.
(E) When connecting pipe, disposable good should avoid multiple demolition, otherwise it will seal performance deteriorated.

 

Classification pipe fittings

Classification pipe fittings
Hydraulic hose, high pressure ball valves, quick intent odd connector ferrule type fittings, welded pipe fittings, high pressure hoses, transition style fittings, bite type fittings, tee pipe fittings, non-standard pipe fittings , computer ups power supply, angled fittings, rotary fittings, quick connector, stainless steel pipe fittings, copper fittings.
Differences in hydraulic fittings and pipe joints ordinary
Largest and most significant difference is that the hydraulic pressure is large hydraulic pipe joint staggering, hydraulic tubing sudden burst impact oil is great.
Can not be replaced by an ordinary dedicated connector, because the hydraulic pressure is able to withstand a lot of ordinary atmospheric pressure up to 0.5 already dying.
3 hydraulic pipe fittings quick principle
Quick couplers, one is with a one-way valve, one is without a check valve. Application with check valve, check valve and the gas source is connected to the end, when you disconnect the check valve closes automatically when you turn on the active side thimble-way valve is opened. Self-locking is to use the ball embedded in the groove, while the ball is locked by a "cone --- cylindrical" sleeve.

 

To develop solar inverter system, must first understand the solar

To develop solar inverter system, must first understand the solar (PV cells) of different characteristics is very important. PV cell model as shown in Fig. Parasitic resistance Rp and Rs is, in the ideal case of zero and infinity, respectively.
Light intensity and temperature can significantly affect the operating characteristics of PV cells. Current proportional to the light intensity, but the impact of changes in the light of the operating voltage is very small. However, the operating voltage is affected by temperature. Battery temperature will reduce the operating voltage, but the current generation of little influence. The figure below illustrates the effect of temperature and light on PV modules.
Effect of temperature and light on the PV module
Effect of light intensity on the battery output high frequency online ups greater than the impact of temperature changes. This is all common PV materials are applicable. Important result of these two effects upon binding to, PV battery Solar panel inverter will decrease with the decrease of light intensity and rise / or temperature.

Pipe joints leak prevention

Pipe joints leak prevention
In the hydraulic system, both the metal pipe coupling, or industrial ups power supply, are prone to leakage problems. For card sets of pipe joints, mostly due to the pipe by a large external force or impact, so that the card sleeve loose or deformed pipe ends and cause leakage, you should check whether the card holder out of round, whether the defect edge, whether the pipe end in good condition and the extent of compression ferrule nut, while also eliminating external piping. For flared Online ups, mostly due to excessive flaring, substandard quality requirements or repeatedly demolished, resulting in flaring deformation or cracks caused by leaks, then you can be re-flared front end truncated. If the top male and female cones pressure seal, which is mostly due to two cone leak damage, available grinders for grinding cone. In some by "о" or outer-ring seal by the end face of the occasion, the leakage following reasons: "о" ring deformation caused by aging or leakage; "о" ring assembly is not in place, so that the two-plane connection when the pressure is uneven or "о" ring is cut cause leakage; "о" ring uncompacted, insufficient amount of elastic deformation caused by leakage; "о" mouth-ring groove just too deep and cause leaks. In this regard, the need to re-select the same diameter and cross-sectional coarse "о" rings, can also be sealed with a flat opening slot stop cutting or grinding to reduce the groove depth of mouth only, so "о" ring has sufficient amount of elastic deformation (compression in general should be between 0.35-0.65mm). For the use of oil and rubber, wool felt, soft steel cardboard combination gasket sealant joints or pipe leaks, no matter what the material is, you should first check the seals without damage, deformation, aging and rough through the large, etc. and then take the appropriate measures.

 

The maximum power point (MPP)

The maximum power point (MPP)
Solar can work in a wide range of voltages and currents. By the irradiation by the resistive load on the battery from zero (a short circuit event) continues to increase the value of high (open event), may determine MPP.MPP is V x I reaches the maximum operating point, and in this irradiation intensity can achieve maximum online offline ups. Output short circuit power is zero (PV voltage is zero) or open (PV current is zero) when the event.
High-quality single crystal silicon solar cells at a temperature of 25 ° C, can produce 0.60 volts open circuit voltage. In full sunlight and air temperature of 25 ° C, the temperature of a given cell may be close to 45 ° C, which makes the open circuit voltage drops to about 0.55V. As the temperature increases, the open circuit voltage continued to decline until the PV Short circuit module.
Cell temperature of 45 ° C when the maximum Rack mount ups is usually produced under the conditions of 80% and 90% of the open circuit voltage short circuit current. Battery short-circuit current is almost proportional to the intensity of illumination, while the brightness decreases to 80% when the open-circuit voltage can be reduced only by 10%. Lower quality in the case of the battery voltage decreases the current increases faster, so that the available power output from 70% to 50% or even 25%.