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installation method

Characteristics

DBY electric diaphragm pump can pump the flowing liquid and transport the medium which is not easy to flow. It adopts the new cycloidal pinwheel reducer transmission, and drives the double diaphragm to reciprocate through the crankshaft slider transmission mechanism, so that the working chamber volume changes alternately. The liquid is continuously inhaled and removed. It has many advantages for conveying machinery such as self-priming pumps, submersible pumps, shielded pumps, mud pumps and impurity pumps.

1. No need to irrigate water, the suction stroke is up to 5 meters and the lift is up to 30m.

2, through the performance of good, the diameter of the particles below 10mm, mud, etc. can be passed without difficulty.

3. Since the diaphragm pump will be separated by the conveying medium and the transmission parts, all the medium will never leak out. Moreover, the pump itself has no shaft seal and the service life is greatly extended. According to different media, the diaphragm is divided into neoprene, fluororubber, nitrile rubber, tetrafluoroethylene, etc., which can meet the requirements of different users.

4. The flow medium of the pump body is divided into cast iron, aluminum alloy, stainless steel and fluorine-lined according to user requirements. The motor is divided into two types: ordinary type and explosion-proof type.

working principle

The motor (4) drives the diaphragm (2) on the left and right ends of the plunger to reciprocate one by one through the reduction gear box (3). In the left and right pump chambers, there are four upper and two one-way ball valves (2). The movement of the diaphragm causes the volume in the working chamber to be more than annu, forcing the four one-way ball valves to alternately open and close, thereby continuously flowing the liquid. Inhalation and elimination.

Precautions

1) Diaphragm pump open parking load operation

The diaphragm pump is driven by the variable frequency motor. If the parking load is too large or too small, in order to avoid the above situation, the hard-opening parking load is controlled at about 30%, and the load is set in the meter to increase or decrease the load. It can be completed in a period of time, and the maintenance of the inverter is effectively performed from the process.

2) Diaphragm pump instrument air and lubricant pressure system operation

The instrument air and lubricating oil pressure of the diaphragm pump are interlocked with the main motor. The oil filling and draining valve of the propelling fluid are gas-closed valves. The air pressure must be maintained at all times. The minimum operating pressure of the two valves is not less than 0.4MPa. Therefore, the air pressure of the instrument is generally maintained above 015 MPa. Even if the pump is stopped, the instrument air is not stopped, so as to prevent the liquid in the liquid chamber from being insufficient or excessive, and the air supplied to the valve is filtered and oil atomized.

When the diaphragm pump is in operation, the lubricating oil pressure should not be lower than the pressure interlocking value (0115MPa), and the pressure difference of the lubricating oil outlet filter should not be too large. The steel ball in the lubricating oil flow sight glass should be at the upper limit position, and the flow rate is adjusted. The adjustment range should not be too large, so as to avoid the instantaneous flow being too large, causing the pressure to drop too fast, causing the interlock to jump.

Through the above process improvement and mastery of the operation points, the diaphragm pump always has a stable process environment during operation. After more than one year of operation, only one time due to electrical reasons, the vehicle has achieved long-term, safe and efficient operation.

1. The name of the electric diaphragm pump;

2. Electric diaphragm pump model (QBY1, QBY2, QBK, DBY, XDBY);

3. Electric diaphragm pump material;

4. Electric diaphragm pump specifications (10-100);

5. Electric diaphragm pump flow (0.8-30);

6. Electric diaphragm pump head;

7. The electric diaphragm pump uses medium;

8. Electric diaphragm pump medium temperature;

9. Electric diaphragm pump connection (flange, wire);

10. Electric diaphragm pump drive mode (pneumatic, electric);

11. Electric diaphragm pump power;

The mode of action of the electric diaphragm pump is only when the pneumatic actuator is selected, and its action mode is formed by the combination of the positive and negative action of the actuator and the positive and negative action of the valve. There are 4 kinds of combinations, namely, positive (gas-closed), positive and negative (air-open), anyway (air-open), and reverse (air-closed). The diaphragm pump formed by these four combinations has a gas function. Open and gas two. The choice of diaphragm pump mode of action is mainly considered from three aspects: a) process production safety; b) medium characteristics; c) product quality and economic loss. (III) Selection of flow characteristics of diaphragm pump

The flow characteristic of the electric diaphragm pump refers to the relationship between the relative flow rate of the medium flowing through the valve and the displacement (relative opening degree of the valve). The ideal flow characteristics mainly include four types: straight line, equal percentage (logarithm), parabola and quick opening. The commonly used ideal flow characteristics are only straight lines, equal percentages (logarithmic), and quick opening. The parabolic flow characteristics are between straight and equal percentages. They can generally be replaced by equal percentage characteristics. The fast opening characteristics are mainly used in two-position adjustment and program control. Therefore, the choice of diaphragm pump characteristics is actually linear and equal percentage flow characteristics. s Choice.

The choice of the flow characteristics of the electric diaphragm pump can be calculated theoretically, but the methods and equations used are complex. Today, more experience criteria are adopted, which are considered from the following aspects: (1) from the adjustment quality of the adjustment system and selection; 2 from the case of process piping; 3 from the load change analysis.

By selecting the flow characteristics of the diaphragm pump, the shape and structure of the valve spool can be determined according to its flow characteristics. However, for diaphragm valves, butterfly valves, etc., due to their structural characteristics, it is impossible to change the shape of the valve core to achieve The required flow characteristics can be achieved by changing the shape of the feedback cam of the valve positioner.

性能参数：

型号	流量 (m3/h)	吸程 (m)	扬程 (m)	出口压力 (kgf/cm2)	电动功率 转/KW	使用温度℃	泵进出口 尺 寸	重量 kg
铸铁	不锈钢
DBY-10	0.5	3	30	3	1450/0.55	90	150	3/8" 丝扣	50
DBY-15	0.75	3	30	3	1450/0.55	90	150	1/2" 丝扣	50
DBY-25	3.5	4	30	3	1450/1.5	90	150	1" 丝扣	170
DBY-40	4.5	4	30	3	1450/2.2	90	150	11/2"丝扣	180
DBY-50	6.5	4.5	30	3	1450/4	90	150	50mm法兰	400
DBY-65	8	4.5	30	3	1450/4	90	150	65mm法兰	400
DBY-80	16	5	30	3	1450/5.5	90	150	80mm法兰	610
DBY-100	20	5	30	3	1450/5.5	90	150	100mm法兰	610