CN109990953A - A high-pressure diaphragm pump diaphragm fault diagnosis device and diagnosis method for conveying slurry - Google Patents

Abstract

The invention relates to a fault diagnosis device and a diagnosis method for a diaphragm of a high-pressure diaphragm pump for conveying slurry, and belongs to the technical field of fault diagnosis. The device includes an oil chamber, a water chamber, a slurry chamber, a diaphragm, a diaphragm chamber wall, a current collector, a power supply, a controller, and a metal probe. The water chamber is separated from the oil chamber and the slurry chamber by two diaphragms. The two ends of the water chamber are respectively equipped with metal probes. The metal probes are connected to the power supply through a signal line, and a current collector is installed at one end of the power supply. The current collector is connected to the controller through the signal line, and the controller calculates the resistance value in the water chamber according to the current value and the voltage value of the power supply, and judges whether the diaphragm leaks. The invention can monitor the diaphragm leakage fault of the high-pressure diaphragm pump, and can basically eliminate the slurry entering the oil chamber through the diaphragm leakage port and endanger the working part of the piston, greatly reducing the probability of safety accidents caused by the diaphragm leakage fault, and prolonging the diaphragm leakage. Pump life and personal safety.

Description

A high-pressure diaphragm pump diaphragm fault diagnosis device and diagnosis method for conveying slurry

technical field

The invention relates to a fault diagnosis device and a diagnosis method for a diaphragm of a high-pressure diaphragm pump for conveying slurry, belonging to the technical field of fault diagnosis.

Background technique

The high-pressure diaphragm pump is an ideal mechanical equipment for transporting highly corrosive and high-pressure solid and liquid two-phase media. It is developed on the basis of the reciprocating piston pump. The diaphragm is added to separate the slurry from the piston. It has both a piston The pump can convey the advantages of high head, high concentration, high temperature and high alkalinity, and also has the new characteristics of diaphragm pump itself, such as high abrasion resistance, high wearing parts life, easy maintenance, high continuous operation efficiency, low operating cost, high efficiency, energy saving and environmental protection. . When the high-pressure diaphragm pump fails, it will cause the entire system to stop working, resulting in serious economic losses. Diaphragm is one of the important parts of diaphragm pump, and its operating state directly affects the operation of the entire pump system. At present, when the existing diaphragm pump is working, if the diaphragm of the diaphragm pump leaks, the diaphragm pump will be damaged at light level, and a safety accident may be caused at worst.

SUMMARY OF THE INVENTION

Aiming at the defects of the prior art, the present invention provides a high-pressure diaphragm pump diaphragm fault diagnosis device and a diagnosis method for conveying slurry, mainly to solve the problem that when the diaphragm pump diaphragm leaks, the slurry enters the oil chamber and endangers the piston. For problems in the working part, timely detection of diaphragm leakage and reminding staff to replace and maintain, greatly reducing the probability of safety accidents due to diaphragm leakage failure, prolonging the life of the diaphragm pump and protecting personal safety.

In order to solve the above problems, the technical scheme of the present invention is: a high-pressure diaphragm pump diaphragm fault diagnosis device for conveying slurry, comprising an oil chamber 1, a water chamber 2, a slurry chamber 3, a diaphragm I4, a diaphragm II5, a diaphragm Chamber wall 6, current collector 7, power supply 8, controller 9, metal probe 10,

The oil chamber 1 , the water chamber 2 and the slurry chamber 3 are arranged side by side and the upper and lower ends of the three are respectively provided with non-conductive diaphragm chamber walls 6 . On the side, the water chamber 2 is isolated from the oil chamber 1 by the diaphragm I4, and is isolated from the slurry chamber 3 by the diaphragm II5. The diaphragm I4 and the diaphragm II5 are non-conductive diaphragms. The upper and lower ends of the water chamber 2 are respectively A metal probe 10 is installed, and the metal probe 10 is connected to the power supply 8 through a signal line. The power supply 8 adopts a constant voltage DC power supply, and a current collector 7 is installed at one end of the power supply 8, and the current collector 7 is connected to the controller through the signal line. 9 is connected, the controller 9 calculates the resistance value in the water chamber 2 according to the current value collected by the current collector 7 and the voltage value of the power supply 8, and judges whether the diaphragm leaks or not. connect.

Specifically, the water chamber 2 is filled with clean water with a specific conductivity.

Specifically, the inner wall of the diaphragm chamber wall 6 is a layer of insulating wall, which is non-conductive.

A method for diagnosing a fault diagnosis device for a diaphragm of a high-pressure diaphragm pump for conveying slurry, comprising the following steps:

Step1: After each component is connected, it works normally, and the controller 9 calculates the resistance value in the water chamber 2 according to the current value collected by the current collector 7 and the voltage value of the power supply 8;

Step2: When the current value collected by the current collector 7 becomes smaller, the resistance value calculated by the controller 9 becomes larger, the controller 9 determines that the diaphragm I4 has a leakage fault, and the oil chamber 1 and the water chamber 2 are connected. When the controller 9 issues an alarm to remind the staff to replace the diaphragm I4 in time;

When the current value collected by the current collector 7 becomes larger, the resistance value calculated by the controller 9 becomes smaller, the controller 9 judges that the diaphragm II5 has a leakage fault, and the slurry chamber 3 and the water chamber 2 are connected. When the controller 9 sends out an alarm to remind the staff to replace the diaphragm II5 in time.

The beneficial effects of the present invention are: the present invention can monitor the diaphragm leakage fault of the high-pressure diaphragm pump, and can basically eliminate the possibility that the slurry enters the oil chamber through the diaphragm leakage port to endanger the working part of the piston, and greatly reduces the safety caused by the diaphragm leakage fault. The probability of an accident prolongs the life of the diaphragm pump and protects personal safety.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a graph of the resistance change when the diaphragm I has a leakage fault;

Figure 3 is a curve diagram of the resistance change when the diaphragm II has a leakage fault.

Each label in the figure: 1-oil chamber, 2-water chamber, 3-slurry chamber, 4-diaphragm I, 5-diaphragm II, 6-diaphragm chamber wall, 7-current collector, 8-power supply, 9 - Controller, 10- Metal Probe.

Detailed ways

Example 1: As shown in Figure 1-3, a high-pressure diaphragm pump diaphragm fault diagnosis device for conveying slurry, including oil chamber 1, water chamber 2, slurry chamber 3, diaphragm I4, diaphragm II5, diaphragm Chamber wall 6, current collector 7, power supply 8, controller 9, metal probe 10,

The oil chamber 1 , the water chamber 2 and the slurry chamber 3 are arranged side by side and the upper and lower ends of the three are respectively provided with non-conductive diaphragm chamber walls 6 . On the side, the water chamber 2 is isolated from the oil chamber 1 by the diaphragm I4, and is isolated from the slurry chamber 3 by the diaphragm II5. The diaphragm I4 and the diaphragm II5 are non-conductive diaphragms. The upper and lower ends of the water chamber 2 are respectively A metal probe 10 is installed, and the metal probe 10 is connected to the power supply 8 through a signal line. The power supply 8 adopts a constant voltage DC power supply, and a current collector 7 is installed at one end of the power supply 8, and the current collector 7 is connected to the controller through the signal line. 9 is connected, the controller 9 calculates the resistance value in the water chamber 2 according to the current value collected by the current collector 7 and the voltage value of the power supply 8, and judges whether the diaphragm leaks or not. connect.

Further, the water chamber 2 is filled with clean water with a specific conductivity.

Further, the inner wall of the diaphragm chamber wall 6 is a layer of insulating wall, which is non-conductive.

A method for diagnosing a fault diagnosis device for a diaphragm of a high-pressure diaphragm pump for conveying slurry, comprising the following steps:

Step1: After each component is connected, it works normally, and the controller 9 calculates the resistance value in the water chamber 2 according to the current value collected by the current collector 7 and the voltage value of the power supply 8;

Step2: When the diaphragm I4 leaks, the oil chamber 1 and the water chamber 2 are connected. With the mutual flow of oil and water, the medium between the metal probes changes. Due to the extremely low conductivity of the oil, the medium increases resistance. Therefore, when the current value collected by the current collector 7 becomes smaller, the resistance value calculated by the controller 9 becomes larger, and the change of the resistance value is shown in Figure 2. It can be judged that the diaphragm I4 has a leakage fault. At this time, the controller An alarm is issued to remind the staff to replace the diaphragm I4 in time. It greatly reduces the probability of safety accidents due to diaphragm leakage failure, prolongs the life of the diaphragm pump and protects personal safety.

When the diaphragm II5 leaks, the slurry chamber 3 and the water chamber 2 are connected. With the mutual flow of the slurry and the water, the medium between the metal probes changes. more, reducing the dielectric resistance. Therefore, when the current value collected by the current collector 7 becomes larger, the resistance value calculated by the controller 9 becomes smaller, and the change of the resistance value is shown in Figure 3. It can be judged that a leakage fault has occurred in the diaphragm II5. At this time, the controller An alarm is issued to remind the staff to replace the diaphragm II5 in time. It greatly reduces the probability of safety accidents due to diaphragm leakage failure, prolongs the life of the diaphragm pump and protects personal safety.

The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made within the scope of knowledge possessed by those of ordinary skill in the art without departing from the spirit of the present invention. Various changes.

Claims (4)

1. A high-pressure diaphragm pump diaphragm fault diagnosis device for conveying slurry, characterized in that it comprises an oil chamber (1), a water chamber (2), a slurry chamber (3), a diaphragm I (4), a diaphragm II (5), diaphragm chamber wall (6), current collector (7), power supply (8), controller (9), metal probe (10), The oil chamber (1), the water chamber (2), and the slurry chamber (3) are arranged side by side, and the upper and lower ends of the three are respectively provided with non-conductive diaphragm chamber walls (6). The slurry chamber (3) is located on both sides of the water chamber (2). The water chamber (2) is separated from the oil chamber (1) by the diaphragm I (4), and is separated from the slurry chamber (3) by the diaphragm II (5). ) isolated, diaphragm I (4) and diaphragm II (5) are non-conductive diaphragms, the upper and lower ends of the water chamber (2) are respectively equipped with metal probes (10), and the metal probes (10) pass through the signal line. Connected to the power supply (8), the power supply (8) adopts a constant voltage DC power supply, and a current collector (7) is installed at one end of the power supply (8), and the current collector (7) communicates with the controller (9) through a signal line ) is connected, the controller (9) calculates the resistance value in the water chamber (2) according to the current value collected by the current collector (7) and the voltage value of the power supply (8), and judges whether the diaphragm has a leakage fault, and controls the The device (9) is connected with the monitoring equipment of the staff. 2 . The high-pressure diaphragm pump diaphragm fault diagnosis device for conveying slurry according to claim 1 , wherein the water chamber ( 2 ) is filled with clean water with a specific conductivity. 3 . 3 . The high-pressure diaphragm pump diaphragm fault diagnosis device for conveying slurry according to claim 1 , wherein the inner wall of the diaphragm chamber wall ( 6 ) is a layer of insulating wall, which is non-conductive. 4 . 4. A diagnostic method for a high-pressure diaphragm pump diaphragm fault diagnosis device for conveying slurry according to any one of claims 1-3, characterized in that: comprising the steps of: Step1: After each component is connected and works normally, the controller (9) calculates the resistance value in the water chamber (2) according to the current value collected by the current collector (7) and the voltage value of the power supply (8); Step2: When the current value collected by the current collector (7) becomes smaller and the resistance value calculated by the controller (9) becomes larger, the controller (9) judges that the diaphragm I (4) has a leakage fault, and the oil chamber (1) It is connected to the water chamber (2), at this time the controller (9) issues an alarm to remind the staff to replace the diaphragm I (4) in time; When the current value collected by the current collector (7) becomes larger, the resistance value calculated by the controller (9) becomes smaller, the controller (9) judges that the diaphragm II (5) has a leakage fault, and the slurry chamber (3) Connect with the water chamber (2), at this time the controller (9) issues an alarm to remind the staff to replace the diaphragm II (5) in time.