Nitrogen white oil flush septum device

Abstract

The present application relates to metering pump cleaning technical field, especially for a kind of nitrogen white oil flush diaphragm device, including flush pipeline, flush pipeline is further subdivided into first pipeline, second pipeline, third pipeline and fourth pipeline, flush system is formed by specific connecting relationship between each pipeline, specifically, one end of second pipeline is connected with gas injection device, the other end is connected with fourth pipeline, fourth pipeline is used to inject flush medium into the inside of metering pump, in the present application, diaphragm in metering pump is flushed by nitrogen and white oil in turn, wherein, nitrogen provides strong driving force, and white oil is used as medium to clean tiny gap, both work together, realize high-efficiency, thorough flushing effect, effectively remove the corrosive substance such as triethylaluminum remaining in pump, ensure the safety of overhaul process, improve the service life of metering pump, ensure the long-term stable operation of pump body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metering pump cleaning, in particular to a nitrogen white oil flushing diaphragm device. BACKGROUND

[0002] The diaphragm metering pump is a kind of pump equipment that uses a specially designed flexible diaphragm to replace the traditional piston, and through the driving mechanism, the diaphragm realizes reciprocating motion, thereby completing the suction and discharge process of the liquid. The pump realizes effective isolation between the metered fluid and the driving lubrication mechanism in structure, ensuring the accuracy of metering and the purity of the fluid. Due to the adoption of high-tech structural design and new materials, the diaphragm metering pump not only has a long service life, but also has excellent corrosion resistance, and is widely used in petroleum, chemical industry, pharmaceutical industry, environmental protection and other fields, becoming the main pump type in fluid metering application.

[0003] Although the diaphragm metering pump performs well in many aspects, there are still some problems that need to be solved in actual application. Especially when dealing with fluids containing corrosive or easily remaining substances, such as triethyl aluminum, which is extremely easy to burn and explode when meeting air or water, and the existing flushing method often fails to completely remove the residues in the pump, increasing the safety risk in the maintenance process, and at the same time causing impurities to easily accumulate inside the diaphragm and pump body, affecting the performance and service life of the pump. These problems not only increase the maintenance cost of the equipment, but also may pose a potential threat to production safety. SUMMARY

[0004] The purpose of the present application is to provide a nitrogen white oil flushing diaphragm device to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A nitrogen white oil flushing diaphragm device, comprising

[0007] The flushing pipeline is further divided into a first pipeline, a second pipeline, a third pipeline and a fourth pipeline, and the pipelines are connected through a specific connection relationship to form a flushing system. Specifically, one end of the second pipeline is connected with a gas injection device, and the other end is connected with the fourth pipeline. The fourth pipeline is used to inject flushing medium into the inside of the metering pump. The bottom end of the first pipeline is connected with the top of the second pipeline. The other end of the first pipeline is connected with an oil storage tank. The bottom of the oil storage tank is provided with the third pipeline. The bottom end of the third pipeline is connected with the top of the second pipeline. The connection end of the second pipeline and the gas injection device is provided with a pneumatic two-way joint. The pneumatic two-way joint is used to adjust the pressure of nitrogen injected into the second pipeline by the gas injection device.

[0008] The pressure relief valve is arranged outside the first pipeline and the second pipeline, and comprises a pressure relief chamber, one end of the pressure relief chamber is provided with a fixing sleeve, and the other end of the pressure relief chamber is provided with at least two pressure relief openings, and the inner cavity of the pressure relief chamber is provided with a pressure plate.

[0009] The pressure gauge is arranged on one side of the metering pump, and is used for detecting and displaying pressure data in the metering pump; one side of the pressure gauge is provided with an outflow pipe for discharging impurities and waste liquid flushed down by the diaphragm inside the metering pump.

[0010] Preferably, one side of the pressure plate is provided with a movable shaft, one side of the fixing sleeve is provided with a movable hole, the movable shaft protrudes out of the movable hole, the outer side of the movable shaft is provided with a pressure spring, one end of the pressure spring is in contact with one end of the inner cavity of the fixing sleeve, and the outer side of the pressure plate is in transition fit with the inner wall of the pressure relief chamber.

[0011] Preferably, the gas injection end of the gas injection device is provided with a speed regulating device, the other end of the speed regulating device is connected with one end of the second pipeline, the top of the speed regulating device is provided with a servo motor, the output end of the servo motor is connected with a driving shaft, the bottom end of the driving shaft is connected with a ball valve, the ball valve is located in the inner cavity of the speed regulating device, and the surface of the ball valve is provided with a first valve port penetrating through itself.

[0012] Preferably, the top of the oil storage tank is provided with an oil injection hole, the inner wall of the oil injection hole is provided with a plug, the inner cavity of the oil injection hole is provided with a speed regulating device, and the inner wall of the oil injection hole is provided with a spiral groove matched with the outer side of the plug.

[0013] Preferably, the gas injection device, the oil storage tank and the flushing pipeline are combined to form an independent flushing device, and the flushing device is detachably connected with the metering pump, and specifically, the fourth pipeline and the metering pump are designed to be detachably connected.

[0014] Preferably, one side of the metering pump is provided with a butt joint pipe, the inner cavity of the butt joint pipe is provided with a spiral groove, one end of the pressure gauge is provided with a communication seat, and one end of the communication seat is provided with a threaded pipe.

[0015] Preferably, valves are arranged on the first pipeline, the second pipeline, the third pipeline and the fourth pipeline, and the valves are used for controlling the opening and closing of the pipelines.

[0016] Preferably, the inner wall of the pressure relief opening is provided with a fixing seat, the inner wall of the fixing seat is provided with a sealing plug, the inner wall of the fixing sleeve and the outer side of the pressure relief chamber are provided with air-tight rings matched with each other, and one end of the movable shaft is provided with a sealing gasket matched with the movable hole.

[0017] Preferably, the inner wall of the speed regulating device is provided with a valve seat, the ball valve is located in the inner cavity of the valve seat, and the inner cavity of the valve seat is adapted to the outer side of the ball valve. The valve seat is provided with a second valve port with the same diameter as the first valve port.

[0018] Preferably, a controller is provided on one side of the oil storage tank, and a pressure sensor is provided in the first pipeline, the second pipeline and the fourth pipeline. The pressure sensor detects the pressure inside the pipeline in real time and transmits the detected pressure data to the controller for processing. The controller is also electrically connected to a servo motor.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, nitrogen and white oil are used alternately to flush the diaphragm in the metering pump. Nitrogen provides a strong driving force, while white oil acts as a medium to deeply clean tiny gaps. The two work together to achieve a highly efficient and thorough flushing effect, effectively removing corrosive substances such as triethylaluminum remaining in the pump, ensuring the safety of the maintenance process, and improving the service life of the metering pump, thus ensuring the long-term stable operation of the pump body.

[0021] 2. In this invention, multiple pressure relief valves are introduced into the pipeline of the flushing device. When the nitrogen pressure in the pipeline rises abnormally, the pressure relief valves can open automatically to release excess pressure in time, preventing pipeline rupture or equipment damage. When the pressure returns to normal, the pipeline is resealed, ensuring the safety and controllability of the nitrogen injection process and guaranteeing the safety of the flushing device when flushing the metering pump diaphragm.

[0022] 3. In this invention, the pressure in the pipeline is monitored in real time by a sensor. When the pipeline pressure exceeds the threshold, the speed adjustment device is activated by the controller to automatically adjust the nitrogen injection speed, further reducing the pressure in the pipeline and equipment, further ensuring the safety of the flushing equipment during nitrogen delivery, and allowing for precise control of the amount of white oil injected, thus achieving refined control of the flushing process and significantly reducing resource waste. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged view of area A in the image;

[0025] Figure 3 For the present invention Figure 1 A schematic diagram of the overall structure of the gas injection device;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the overall structure of the medium speed regulating device;

[0027] Figure 5 For the invention Figure 1 The enlarged schematic view of the top structure of the oil storage tank;

[0028] Figure 6 For the invention Figure 1 The schematic view of the overall structure of the pressure relief valve;

[0029] Figure 7 For the invention Figure 6 The cross-sectional view of the overall structure of the pressure relief valve;

[0030] Figure 8 For the invention Figure 1 The schematic view of the structure of the connection between the metering pump and the pressure gauge;

[0031] In the figure: 1, metering pump; 11, butt joint pipe; 2, gas injection device; 21, speed regulating device; 22, servo motor; 23, drive shaft; 24, ball valve; 241, first valve port; 25, valve seat; 251, second valve port; 3, oil storage tank; 31, plug; 32, oil injection hole; 4, pressure gauge; 41, outflow pipe; 42, communication seat; 43, threaded pipe; 5, flushing pipeline; 51, first pipeline; 52, second pipeline; 53, third pipeline; 54, fourth pipeline; 55, valve; 56, pneumatic two-piece; 6, controller; 7, pressure relief valve; 71, pressure relief chamber; 711, pressure relief port; 712, fixed seat; 713, sealing plug; 72, fixed sleeve; 721, movable hole; 73, movable shaft; 731, sealing gasket; 74, pressure plate; 75, pressure spring. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] Please refer to Figures 1-8 , the present application provides a technical solution:

[0034] A nitrogen white oil flushing diaphragm device, comprising

[0035] The flushing pipeline 5 is further subdivided into a first pipeline 51, a second pipeline 52, a third pipeline 53 and a fourth pipeline 54, and the pipelines are connected in a specific connection relationship to form a flushing system, specifically, one end of the second pipeline 52 is connected with the gas injection device 2, the other end is connected with the fourth pipeline 54, the fourth pipeline 54 is used for injecting the flushing medium into the inside of the metering pump 1, the bottom end of the first pipeline 51 is connected with the top of the second pipeline 52, the other end of the first pipeline 51 is connected with the oil storage tank 3, the bottom of the oil storage tank 3 is provided with the third pipeline 53, the bottom end of the third pipeline 53 is connected with the top of the second pipeline 52, the connecting end of the second pipeline 52 with the gas injection device 2 is provided with a pneumatic two-way joint 56, the pneumatic two-way joint 56 is used for adjusting the pressure of the nitrogen gas injected by the gas injection device 2 into the second pipeline 52;

[0036] The pressure relief valve 7 is arranged outside the first pipeline 51 and the second pipeline 52, the pressure relief valve 7 comprises a pressure relief chamber 71, one end outside of the pressure relief chamber 71 is provided with a fixed sleeve 72, at least two pressure relief openings 711 are arranged outside the other end of the pressure relief chamber 71, and the inner cavity of the pressure relief chamber 71 is provided with a pressure plate 74;

[0037] The pressure gauge 4 is arranged on one side of the metering pump 1, the pressure gauge 4 is used for detecting and displaying the pressure data in the metering pump 1, one side of the pressure gauge 4 is provided with an outflow pipe 41, which is used for discharging the impurities and waste liquid flushed down by the diaphragm in the inside of the metering pump 1.

[0038] In this embodiment, please refer to Figure 7 One side of the pressure plate 74 is provided with a movable shaft 73, one side of the fixed sleeve 72 is provided with a movable hole 721, the movable shaft 73 protrudes from the movable hole 721, the outer side of the movable shaft 73 is provided with a pressure spring 75, one end of the pressure spring 75 is in contact with one end of the inner cavity of the fixed sleeve 72, the outer side of the pressure plate 74 is in transition fit with the inner wall of the pressure relief chamber 71, in this embodiment, when the gas pressure in the first pipeline 51 or the second pipeline 52 increases sharply, when the gas pressure amplitude exceeds the maximum elastic force value that the pressure spring 75 can generate in the static state, the pressure plate 74 is pushed to move backward, and the movable shaft 73 is moved backward, the pressure spring 75 is squeezed to generate deformation, when the pressure plate 74 moves to the rear of the pressure relief opening 711, the gas can be discharged through the pressure relief opening 711, after the pressure is discharged, the gas pressure in the first pipeline 51 and the second pipeline 52 decreases, the pressure spring 75 is subjected to reduced pressure, and rebounds to move the movable shaft 73 and the pressure plate 74 forward to the front of the pressure relief chamber 71, so as to avoid continuous discharge of the gas.

[0039] In this embodiment, please refer to Figures 3-4The gas injection end of the gas injection device 2 is provided with a speed regulating device 21, one end of the speed regulating device 21 is connected with the second pipeline 52, the top of the speed regulating device 21 is provided with a servo motor 22, the output end of the servo motor 22 is connected with a driving shaft 23, the bottom end of the driving shaft 23 is connected with a ball valve 24, the ball valve 24 is located in the inner cavity of the speed regulating device 21, the surface of the ball valve 24 is provided with a first valve port 241 penetrating through itself, in the embodiment, the servo motor 22 is powered to drive the driving shaft 23 to rotate the ball valve 24, the position of the first valve port 241 can be adjusted by rotating the ball valve 24, by controlling the orientation of the first valve port 241, the speed of the gas passing through the speed regulating device 21 can be adjusted, and the channel can also be closed to prevent the gas from passing through the speed regulating device 21.

[0040] In the embodiment, please refer to Figure 5 The top of the oil storage tank 3 is provided with an oil injection hole 32, the inner wall of the oil injection hole 32 is provided with a plug 31, the inner cavity of the oil injection hole 32 is provided with a speed regulating device 21, the inner wall of the oil injection hole 32 is provided with a spiral groove matched with the outer side of the plug 31, in the embodiment, by rotating and pulling out the plug 31, white oil can be injected into the oil storage tank 3 through the oil injection hole 32, after the injection is completed, the plug 31 is tightened to prevent white oil from leaking from the oil injection hole 32, and at the same time, since the inner cavity of the oil injection hole 32 is provided with the speed regulating device 21, the injection speed of the white oil can be adjusted by the speed regulating device 21 to avoid waste caused by excessive injection of white oil.

[0041] In the embodiment, please refer to Figure 1 The gas injection device 2, the oil storage tank 3 and the flushing pipeline 5 are combined to form an independent flushing device, and the flushing device is detachably connected with the metering pump 1, specifically, the fourth pipeline 54 and the metering pump 1 are designed to be detachably connected, in the embodiment, when the metering pump 1 needs to be flushed, the fourth pipeline 54 is connected with the metering pump 1 to enable the flushing device to flush the diaphragm in the metering pump 1, and after the flushing is completed, the connection is disconnected, without affecting the normal use of the metering pump 1.

[0042] In the embodiment, please refer to Figure 8 One side of the metering pump 1 is provided with a butt joint pipe 11, the inner cavity of the butt joint pipe 11 is provided with a spiral groove, one end of the pressure gauge 4 is provided with a communication seat 42, one end of the communication seat 42 is provided with a threaded pipe 43, in the embodiment, after the flushing device flushes the diaphragm in the metering pump 1, the pressure gauge 4 is removed through the spiral cooperation, white oil is injected into the metering pump 1 through the butt joint pipe 11, and then the pressure gauge 4 is reinstalled, at this time, the metering pump 1 is started, the pump is operated under normal pressure, and white oil flows out at the flow-out pipe 41, this operation can flush the end connected with the pressure gauge 4 of the metering pump 1, avoid a clean dead angle at this position, ensure that white oil flows out at the pressure gauge 4, and ensure that the inside of the metering pump 1 is completely cleaned.

[0043] In the embodiment, please refer to Figure 2 , the first pipeline 51, the second pipeline 52, the third pipeline 53, the fourth pipeline 54 are provided with valves 55, the valve 55 is used for controlling the opening and closing of each pipeline, in the embodiment, when nitrogen is injected through the gas injection device 2, first open the valve at the second pipeline 52 and the fourth pipeline 54, make the nitrogen pass through the pipeline first to the diaphragm inside the metering pump 1 Preliminary flushing treatment, after flushing 2-3 minutes, close the valve at the second pipeline 52, and open the valve on the first pipeline 51 and the third pipeline 53, make the nitrogen pass through the first pipeline 51 into the oil tank 3, push the white oil, make the white oil pass through the third pipeline 53 and the fourth pipeline 54 into the metering pump 1, continue to flush the diaphragm, two kinds of flushing medium are used to clean the diaphragm alternately.

[0044] In the embodiment, please refer to Figure 7 , the inner wall of the pressure relief port 711 is provided with a fixed seat 712, the inner wall of the fixed seat 712 is provided with a sealing plug 713, the inner wall of the fixed sleeve 72 and the outer side of the pressure relief chamber 71 are provided with airtight rings matched with each other, one end of the movable shaft 73 is provided with a sealing pad 731 matched with the movable hole 721, in the embodiment, when the gas pressure in the pipeline is in the normal state, by setting the sealing plug 713, the airtight rings arranged at the fixed sleeve 72 and the pressure relief chamber 71, and the sealing pad 731 arranged at the movable shaft 73, it is avoided that after the gas leaks from the outside of the pressure plate 74 into the pressure relief chamber 71, the gas leaks from the inner cavity of the pressure relief chamber 71, so as to ensure the airtightness of the pipeline.

[0045] In the embodiment, please refer to Figure 5 , the inner wall of the speed regulating device 21 is provided with a valve seat 25, the ball valve 24 is located in the inner cavity of the valve seat 25, and the inner cavity of the valve seat 25 and the outer side of the ball valve 24 are matched with each other, the valve seat 25 is provided with a second valve port 251 with the same hole diameter as the first valve port 241, in the embodiment, since the ball valve 24 is spherical, there is a gap between the ball valve 24 and the inner wall of the cylinder, by arranging the ball valve 24 in the inner cavity of the valve seat 25, it is avoided that the gas passes through the gap, causing inaccurate flow regulation of the speed regulating device 21, and at the same time, the second valve port 251 with the same size as the first valve port 241 is arranged, so that the gas passes through the overlapping surface of the first valve port 241 and the second valve port 251, further ensuring the accuracy of flow control.

[0046] In the embodiment, please refer to Figure 1 , Figure 4The side of the oil storage tank 3 is provided with a controller 6, the first pipeline 51, the second pipeline 52 and the fourth pipeline 54 are all provided with air pressure sensors, the air pressure sensors detect the air pressure in the respective pipelines in real time, and transmit the detected air pressure data to the controller 6 for processing, and the controller 6 is also electrically connected with the servo motor 22, in the embodiment, the air pressure in the pipeline is detected in real time, when the air pressure is higher than the predetermined threshold value, the servo motor 22 is controlled by the controller 6, and the speed of the nitrogen injection device 2 is fine-tuned, so that the safety of the flushing device is further ensured.

[0047] The working principle of the present application is as follows:

[0048] Step one, first, set the stroke of the metering pump to 0%, and close all valves to ensure that the valves in the non-flushing path are closed during the flushing process, rotate the plug 31 and open the oil injection hole 32, inject white oil into the oil storage tank 3 through the oil injection hole 32, and when the injection amount of white oil reaches 150ml, stop injecting, and close the oil injection hole 32 through the plug 31 to prevent white oil leakage, connect the flushing device with the nitrogen injection device 2, and adjust the nitrogen pressure to 2-3kg full pressure state through the valve 55, then open the valves 55 arranged on the second pipeline 52 and the fourth pipeline 54, so that the nitrogen flows along the second pipeline 52 and the fourth pipeline 54, and the diaphragm in the metering pump 1 is flushed, and the diaphragm is flushed for 2-3 minutes, then close the valve 55 arranged on the second pipeline 52, open the valves 55 arranged on the first pipeline 51 and the third pipeline 53, and the nitrogen continues to flow into the pipeline through the nitrogen injection device 2, so that the nitrogen is injected into the inner cavity of the oil storage tank 3 through the first pipeline 51, and the white oil is pushed downward along the third pipeline 53 under the push of the nitrogen, and enters the metering pump 1 through the fourth pipeline 54, and the white oil continues to flush the diaphragm in the metering pump 1 under the push of the nitrogen pressure, and the diaphragm is flushed by the nitrogen and white oil alternately, the nitrogen gas flow expands instantaneously when it is sprayed and absorbs the surrounding heat, and the low-temperature gas flow can make the dust, dirt and residual chemical substances such as triethyl aluminum on the diaphragm quickly solidify into particles and be blown away, and the white oil can further take away part of the small impurities and dirt to clean the diaphragm with high strength;

[0049] Step two, when the gas pressure in the flushing pipeline 5 exceeds the elastic force of the pressure spring 75, the pressure plate 74 is pushed to move backward under the pressure, and the movable shaft 73 is driven to move backward by the pressure plate 74, so that the movable shaft 73 moves outward along the inner wall of the movable hole 721, and the pressure spring 75 is pressed with the inner wall of the fixed sleeve 72, so that the pressure spring 75 is deformed. When the pressure plate 74 moves backward and moves to the rear of the pressure relief port 711, the gas can enter the fixed seat 712 through the pressure relief port 711, and the sealing plug 713 is lifted under the action of the gas pressure, so that the sealing plug 713 is separated from the inner cavity of the fixed seat 712, so that the gas can be discharged through the multiple pressure relief ports 711 outside the pressure relief bin 71, and the gas pressure in the flushing pipeline 5 is rapidly reduced. With the gas discharge, when the gas pressure returns to normal, the pressure spring 75 loses the pressure and rebounds, so that the movable shaft 73 is driven to move forward under the action of the elastic force, and the pressure plate 74 is pushed to move forward along the inner wall of the pressure relief bin 71. When the pressure spring 75 moves to the front of the pressure relief port 711, the gas cannot enter the pressure relief port 711, so that the exhaust stops;

[0050] Step three, the servo motor 22 is powered to control the rotation of the drive shaft 23, and the ball valve 24 is driven to rotate along the inner cavity of the valve seat 25 by the drive shaft 23. When the ball valve 24 rotates, the position of the first valve port 241 changes, and the overlapping area of the first valve port 241 and the second valve port 251 changes. When the first valve port 241 rotates, the overlapping area of the first valve port 241 and the second valve port 251 gradually decreases, and the speed of nitrogen entering the flushing pipeline 5 through the speed regulating device 21 slows down. When the overlapping area of the first valve port 241 and the second valve port 251 gradually increases, the speed of nitrogen entering the flushing pipeline 5 through the speed regulating device 21 gradually increases. When the overlapping area of the first valve port 241 and the second valve port 251 is zero, nitrogen stops discharging from the speed regulating device 21. The gas pressure sensor is arranged in each pipeline of the flushing pipeline 5, which detects the gas pressure in the pipeline in real time and generates an electrical signal to send the gas pressure data to the controller 6. When the gas pressure exceeds the predetermined threshold value, the controller 6 controls and starts the servo motor 22 to reduce the nitrogen discharge speed. According to the gas pressure in the pipeline, the nitrogen discharge speed is adjusted more finely, and the safety of the flushing equipment during nitrogen delivery is further ensured through automatic adjustment. In addition, the inner wall of the oil injection hole 32 is also provided with a speed regulating device 21, which can adjust the injection speed according to the injection demand of white oil, and avoid waste of white oil.

[0051] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations and modifications are intended to be included within the scope of the application as defined in the following claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that the application is defined by the appended claims.

Claims

1. A nitrogen white oil flush septum device characterized by, The utility model relates to a kind of nitrogen gas flushing system of metering pump, including Rinse pipeline (5), the rinse pipeline (5) is further subdivided into first pipeline (51), second pipeline (52), third pipeline (53) and fourth pipeline (54), and specific connection is formed between each pipeline Rinse system; One end of second pipeline (52) is connected with gas injection device (2), the other end is connected with fourth pipeline (54), the fourth pipeline (54) is used to inject flushing medium into the inside of metering pump (1), the bottom of first pipeline (51) is connected with the top of second pipeline (52), the other end of first pipeline (51) is connected with oil storage tank (3), the bottom of oil storage tank (3) is provided with third pipeline (53), and the bottom of third pipeline (53) is connected with the top of second pipeline (52); The connecting end of second pipeline (52) and gas injection device (2) is provided with pneumatic two connectors (56), and the pneumatic two connectors (56) are used to adjust the pressure of nitrogen gas injected into second pipeline (52) by gas injection device (2); Pressure relief valve (7) is arranged outside first pipeline (51) and second pipeline (52), and the pressure relief valve (7) comprises pressure relief bin (71), one end of the pressure relief bin (71) is provided with fixed sleeve (72) outside, at least two pressure relief ports (711) are formed in the other end of the pressure relief bin (71) outside, and the inner cavity of the pressure relief bin (71) is provided with pressure plate (74); Pressure gauge (4) is arranged on one side of metering pump (1), the pressure gauge (4) is used to detect and display pressure data in metering pump (1), and one side of the pressure gauge (4) is provided with outflow pipe (41) for discharging impurities and waste liquid washed down by the diaphragm in the inside of metering pump (1); Valve (55) is arranged on first pipeline (51), second pipeline (52), third pipeline (53) and fourth pipeline (54), and the valve (55) is used to control the opening and closing of each pipeline, when nitrogen gas is injected by gas injection device (2), first, open the valve at second pipeline (52) and fourth pipeline (54), so that nitrogen gas passes through pipeline to preliminarily flush the diaphragm in the inside of metering pump (1), after flushing for 2-3 minutes, close the valve at second pipeline (52), and open the valve on first pipeline (51) and third pipeline (53), so that nitrogen gas enters oil storage tank (3) through first pipeline (51), pushes white oil, and makes white oil enter metering pump (1) through third pipeline (53) and fourth pipeline (54), continues to flush the diaphragm, and two kinds of flushing medium are used to clean the diaphragm alternately.

2. A nitrogen white oil flush septum device according to claim 1, wherein: One side of the pressure plate (74) is provided with movable shaft (73), one side of the fixed sleeve (72) is provided with movable hole (721), the movable shaft (73) protrudes from the movable hole (721), the outer side of the movable shaft (73) is provided with pressure spring (75), one end of the pressure spring (75) is in contact with one end of the inner cavity of the fixed sleeve (72), and the outer side of the pressure plate (74) is in transition cooperation with the inner wall of the pressure relief bin (71).

3. A nitrogen white oil flush septum device as defined in claim 1, wherein: The gas injection device (2) is provided with a speed regulating device (21), one end of the speed regulating device (21) is connected with one end of the second pipeline (52), the top of the speed regulating device (21) is provided with a servo motor (22), the output end of the servo motor (22) is connected with a driving shaft (23), the bottom end of the driving shaft (23) is connected with a ball valve (24), the ball valve (24) is located in the inner cavity of the speed regulating device (21), and the surface of the ball valve (24) is provided with a first valve port (241) penetrating through itself.

4. The nitrogen white oil flush septum device of claim 1, wherein: The top of the oil storage tank (3) is provided with an oil injection hole (32), the inner wall of the oil injection hole (32) is provided with a plug (31), the inner cavity of the oil injection hole (32) is provided with a speed regulating device (21), and the inner wall of the oil injection hole (32) is provided with a spiral groove matched with the outer side of the plug (31).

5. A nitrogen white oil flush septum device as defined in claim 1, wherein: The gas injection device (2), the oil storage tank (3) and the flushing pipeline (5) are combined to form an independent flushing device, and the flushing device is detachably connected with the metering pump (1), and specifically, the fourth pipeline (54) and the metering pump (1) are designed to be detachably connected.

6. A nitrogen white oil flush septum device as defined in claim 1, wherein: One side of the metering pump (1) is provided with a butt joint pipe (11), the inner cavity of the butt joint pipe (11) is provided with a spiral groove, one end of the pressure gauge (4) is provided with a communication seat (42), and one end of the communication seat (42) is provided with a threaded pipe (43).

7. A nitrogen white oil flush septum device as defined in claim 2, wherein: The inner wall of the pressure relief port (711) is provided with a fixing seat (712), the inner wall of the fixing seat (712) is provided with a sealing plug (713), the inner wall of the fixing sleeve (72) and the outer side of the pressure relief bin (71) are provided with mutually matched air-tight rings, and one end of the movable shaft (73) is provided with a sealing gasket (731) matched with the movable hole (721).

8. A nitrogen white oil flush septum device as defined in claim 3, wherein: The inner wall of the speed regulating device (21) is provided with a valve seat (25), the ball valve (24) is located in the inner cavity of the valve seat (25), and the inner cavity of the valve seat (25) and the outer side of the ball valve (24) are matched with each other, and the valve seat (25) is provided with a second valve port (251) with the same hole diameter as the first valve port (241).

9. The nitrogen white oil flush septum device of claim 1, wherein: One side of the oil storage tank (3) is provided with a controller (6), the first pipeline (51), the second pipeline (52) and the fourth pipeline (54) are provided with air pressure sensors, the air pressure sensors detect the air pressure in the respective pipelines in real time, and transmit the detected air pressure data to the controller (6) for processing, and the controller (6) is also electrically connected with the servo motor (22).

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