A diaphragm pump hydraulic chamber propulsion fluid cooling system and method

Abstract

The application relates to a cooling method for propellant liquid of a diaphragm pump, in particular to a diaphragm pump hydraulic cavity propellant liquid cooling system and method, and solves the technical problem that a large amount of heat is easily generated in the reciprocating motion of propellant liquid in the existing diaphragm pump hydraulic cavity, the quality of the propellant liquid is affected, and the diaphragm pump unit is difficult to stably and reliably operate. The diaphragm pump hydraulic cavity propellant liquid cooling system comprises a diaphragm pump body and a piston; the diaphragm pump body comprises a shell, a diaphragm chamber, a diaphragm and a guide rod; an external driving mechanism drives the diaphragm to concave-convexly move through the piston and the propellant liquid in the hydraulic cavity, so that the guide rod reciprocally moves in the hydraulic cavity; the system further comprises a control module, an oil discharge detector, an oil supplement detector, a magnetic ring, an oil supplement valve, an oil discharge valve, a gear oil pump and an oil tank, and the quality and temperature of the propellant liquid can be guaranteed. The method realizes that the propellant liquid in the hydraulic cavity is discharged into the oil tank at a fixed time, and the purpose of oil replacement and cooling is achieved.

Description

Technical Field

[0001] This invention relates to a method for cooling the propellant fluid of a diaphragm pump, and more particularly to a cooling system and method for the propellant fluid in the hydraulic chamber of a diaphragm pump. Background Technology

[0002] The propellant fluid in the hydraulic chamber of the diaphragm pump is normally constant, except for slight leakage at the dynamic and static seals due to the reciprocating motion of the piston. It drives the diaphragm to reciprocate in the hydraulic chamber (i.e., the closed chamber). Therefore, the propellant fluid will generate a lot of heat during long-term operation.

[0003] Currently, the propellant is cooled mainly through natural heat dissipation from the hydraulic chamber housing (i.e., the diaphragm pump body). This is greatly affected by the ambient temperature. When the propellant temperature is high, its quality is easily degraded, which is not conducive to the stable and reliable operation of the diaphragm pump unit. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem that the propellant fluid in the hydraulic chamber of an existing diaphragm pump easily generates a large amount of heat during reciprocating motion, which affects the quality of the propellant fluid and makes it difficult for the diaphragm pump unit to operate stably and reliably. The invention provides a diaphragm pump hydraulic chamber propellant fluid cooling system and method.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A diaphragm pump hydraulic chamber propellant cooling system includes a diaphragm pump body and a piston;

[0007] The diaphragm pump body includes a housing, a diaphragm chamber disposed within the housing, a diaphragm disposed within the diaphragm chamber, and a guide rod connected to the diaphragm; one end of the piston is connected to the end of the housing away from the diaphragm, and the other end of the piston is used to connect to an external drive mechanism; the diaphragm, housing, and piston form a hydraulic cavity; the diaphragm, guide rod, piston, and hydraulic cavity are coaxially arranged; the external drive mechanism causes the diaphragm to move concave and convex through the piston and the propellant fluid located in the hydraulic cavity, thereby driving the guide rod connected to it to reciprocate axially within the hydraulic cavity;

[0008] Its special feature is:

[0009] It also includes an oil tank, a magnetic ring, a control module, an oil drain detector, an oil replenishment detector, an oil replenishment valve, an oil drain valve, and a gear oil pump that are electrically connected to the control module; the external drive mechanism is connected to the control module and is used to transmit the pump speed of the diaphragm pump to the control module.

[0010] The oil drain detector and the oil replenishment detector are sequentially installed on the housing on the side wall of the hydraulic chamber in the direction away from the diaphragm. Their detection ends are all located inside the hydraulic chamber and correspond to the guide rod.

[0011] The magnetic ring is coaxially mounted on the end of the guide rod near the piston.

[0012] The casing is connected to the fuel tank via a replenishment line and a drain line, respectively;

[0013] The gear oil pump and the oil replenishment valve are respectively installed on the oil replenishment pipeline along the direction of the propellant flow;

[0014] The drain valve is located on the drain pipeline.

[0015] Furthermore, a first check valve and a pressure stabilizing tank are sequentially arranged along the flow direction of the propellant on the oil replenishment pipeline; the first check valve and the pressure stabilizing tank are located between the oil replenishment valve and the gear oil pump;

[0016] The first check valve is used to prevent the propellant fluid in the pressure tank from flowing back into the oil tank after the gear oil pump stops working;

[0017] The pressure tank is used to buffer the propellant fluid that has been drawn in and pressurized from the fuel tank.

[0018] Furthermore, a filter is provided between the oil tank and the gear oil pump.

[0019] Furthermore, a second check valve is provided on the drain line; the second check valve is used to prevent the propellant fluid from entering the drain valve and drain line when the hydraulic chamber is under negative pressure after the drain valve is opened.

[0020] Meanwhile, the present invention also provides a method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump, which is characterized by including the following steps:

[0021] 1) Construct the above-mentioned diaphragm pump hydraulic chamber propellant cooling system;

[0022] 2) The control module monitors the pump speed of the diaphragm pump in real time through an external drive mechanism;

[0023] 3) Determine if the pump speed is >5 SPM using the control module; if yes, proceed to step 4); otherwise, return to step 2).

[0024] 4) The control module starts the automatic oil draining program and delays for the first preset time;

[0025] 5) If the control module does not receive the oil replenishment signal from the magnetic ring-triggered oil replenishment detector within the first preset time, then proceed to step 6); otherwise, reset the first preset time delay to zero and return to step 4).

[0026] 6) The control module opens the drain valve to drain oil and continues for a second preset time. During the second preset time, the propulsion fluid in the hydraulic chamber automatically flows back to the oil tank under high pressure. After the second preset time ends, the drain valve automatically closes. At the same time, the oil replenishment detector is monitored in real time to see if it sends an oil replenishment signal. Then, step 7) is executed.

[0027] 7) If the control module does not receive a replenishment signal from the replenishment detector within the second preset time, it returns to step 6) after the set oil draining time interval; if the control module receives a replenishment signal from the replenishment detector within the second preset time, it executes step 8).

[0028] 8) After receiving the oil replenishment signal from the magnetic ring-triggered oil replenishment detector, the control module controls the gear oil pump and oil replenishment valve to replenish the propulsion fluid in the hydraulic chamber. During the replenishment of the propulsion fluid, the control module monitors in real time whether the oil drain detector sends an oil drain signal. If there is an oil drain signal, the control module controls the oil drain valve to open and drain the oil until the oil drain signal ends, thus completing the oil replacement and cooling of the propulsion fluid in the hydraulic chamber. Otherwise, proceed to step 9).

[0029] 9) If there is no oil drain signal, control the automatic oil drain program timing; if the control module receives an oil replenishment signal from the oil replenishment detector within the third preset time, reset the automatic oil drain program timing to zero, restart the timing to the third preset time, and return to step 4); otherwise, return to step 2).

[0030] Furthermore, in step 4), the first preset time is 10 minutes.

[0031] Further, in step 5), the oil replenishment signal emitted by the magnetic ring-triggered oil replenishment detector is specifically as follows:

[0032] When the axis of the magnetic ring and the guide rod is perpendicular to the central axis of the oil replenishment detector, the oil replenishment signal is triggered by the oil replenishment detector.

[0033] Furthermore, in step 6), the second preset time is 0.5s.

[0034] Furthermore, in step 7), the oil discharge time interval is 5s, 9s, or 13s.

[0035] Furthermore, in step 8), the third preset time is 60 minutes.

[0036] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0037] (1) The diaphragm pump hydraulic chamber propellant cooling system of the present invention utilizes a control module, an oil discharge detector, an oil replenishment detector, and a magnetic ring to realize the periodic automatic circulation exchange between the propellant in the hydraulic chamber and the propellant in the oil tank, thereby improving the quality and lowering the temperature of the propellant, thus ensuring the stable and reliable operation of the diaphragm pump unit and extending the diaphragm life.

[0038] (2) The method for cooling the propellant fluid in the hydraulic chamber of the diaphragm pump of the present invention controls the automatic oil discharge through the control module, so as to realize the timed discharge of the propellant fluid in the hydraulic chamber into the oil tank, and the timely replenishment of the hydraulic chamber by drawing new propellant fluid from the oil tank, thereby achieving the purpose of cooling by changing the oil. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an embodiment of the diaphragm pump hydraulic chamber propellant cooling system of the present invention;

[0040] Figure 2 This is a flowchart illustrating an embodiment of the diaphragm pump hydraulic chamber propellant cooling method of the present invention.

[0041] The attached figures are labeled as follows:

[0042] 1-Diaphragm pump body, 2-Diaphragm chamber, 3-Diaphragm, 4-Guide rod, 5-Piston, 6-Hydraulic chamber, 7-Oil discharge detector, 8-Oil replenishment detector, 10-Magnetic ring, 11-Oil replenishment valve, 12-Oil discharge valve, 13-Gear oil pump, 14-Oil tank, 15-Oil replenishment line, 16-Oil discharge line, 17-First check valve, 18-Pressure stabilizing tank, 19-Filter, 20-Second check valve. Detailed Implementation

[0043] like Figure 1 As shown, a diaphragm pump hydraulic chamber propellant cooling system includes a diaphragm pump body 1 and a piston 5. The diaphragm pump body 1 includes a housing, a diaphragm chamber 2 disposed within the housing, a diaphragm 3 disposed within the diaphragm chamber 2, and a guide rod 4 connected to the diaphragm 3. One end of the piston 5 is connected to the end of the housing away from the diaphragm 3, and the other end of the piston 5 is used to connect to an external drive mechanism. The diaphragm 3, the housing, and the piston 5 form a hydraulic chamber 6. The diaphragm 3, the guide rod 4, the piston 5, and the hydraulic chamber 6 are coaxially arranged. The external drive mechanism causes the diaphragm 3 to move concave and convex through the piston 5 and the propellant in the hydraulic chamber 6, thereby driving the guide rod 4 connected thereto to reciprocate axially within the hydraulic chamber 6. The system also includes an oil tank 14, a magnetic ring 10, a control module, an oil discharge detector 7, an oil replenishment detector 8, an oil replenishment valve 11, an oil discharge valve 12, and a gear oil pump 13, all electrically connected to the control module. The external drive mechanism is connected to the control module and is used to transmit the pump speed of the diaphragm pump to the control module.

[0044] Oil drain detector 7 and oil replenishment detector 8 are sequentially arranged on the housing of the side wall of hydraulic chamber 6 in the direction away from diaphragm 3, and their detection ends are located inside hydraulic chamber 6 and correspond to guide rod 4; magnetic ring 10 is coaxially arranged at the end of guide rod 4 near piston 5, and the axes of magnetic ring 10 and guide rod 4 are perpendicular to the central axes of oil drain detector 7 and oil replenishment detector 8; housing is connected to oil tank 14 through oil replenishment pipeline 15 and oil drain pipeline 16 respectively; oil replenishment valve 11 and gear oil pump 13 are sequentially arranged on oil replenishment pipeline 15 in the direction of propulsion fluid flow; oil drain valve 12 is arranged on oil drain pipeline 16.

[0045] A first check valve 17 and a pressure tank 18 are sequentially arranged on the oil replenishment line 15 along the direction of propellant flow; the first check valve 17 and the pressure tank 18 are located between the oil replenishment valve 11 and the gear oil pump 13; the first check valve 17 is used to prevent the propellant in the pressure tank 18 from flowing back to the oil tank 14 after the gear oil pump 13 stops working; the pressure tank 18 is used to buffer the propellant after it is drawn in and pressurized from the oil tank 14.

[0046] In this embodiment, a filter 19 is provided between the oil tank 14 and the gear oil pump 13. The filter 19 filters impurities in the propellant fluid, ensuring the quality of the propellant fluid. A second check valve 20 is provided on the drain line 16. The second check valve 20 is used to prevent propellant fluid from entering the drain valve 12 and the drain line 16 when the hydraulic chamber 6 is under negative pressure after the drain valve 12 is opened.

[0047] The working principle of the above embodiments is as follows:

[0048] When the diaphragm pump is working, the guide rod 4 moves together with the diaphragm 3. By using the magnetic ring 10 as a reference, the movement range of the diaphragm 3 can be determined by detecting the movement position of the magnetic ring 10 on the guide rod 4.

[0049] When the magnetic ring 10 moves with the guide rod 4 to the piston 5 side and reaches the position of the oil replenishment detector 8 (that is, the axis of the magnetic ring 10 and the guide rod 4 is perpendicular to the central axis of the oil replenishment detector 8), the oil replenishment detector 8 sends an oil replenishment signal. When the control module receives the oil replenishment signal, it controls the oil replenishment valve 11 to open, and the propellant in the oil tank 14 is injected into the hydraulic chamber 6 through the oil replenishment pipeline 15 to complete the oil replenishment.

[0050] When the magnetic ring 10 moves with the guide rod 4 towards the diaphragm chamber 2 to the position of the oil discharge detector 7 (i.e., the axis of the magnetic ring 10 and the guide rod 4 is perpendicular to the central axis of the oil discharge detector 7), the oil discharge detector 7 sends an oil discharge signal. When the control module receives the oil discharge signal, it controls the oil discharge valve 12 to open, and the propellant in the hydraulic chamber 6 flows back to the oil tank 14 along the oil discharge pipeline 16.

[0051] During normal operation of the diaphragm pump, the control module ensures that the propellant fluid between the piston 5 and the diaphragm 3 remains within a specified range, allowing the diaphragm 3 to operate within its optimal working range. This achieves position control of the diaphragm 3 and extends its service life. However, the propellant fluid in the hydraulic chamber 6 generates a large amount of heat during prolonged operation, and excessively high oil temperatures can degrade the propellant fluid quality. Therefore, to cool the propellant fluid in the hydraulic chamber 6, a control module is used to automatically circulate and exchange the propellant fluid in the hydraulic chamber 6 with the propellant fluid in the oil tank 14 through timed oil drainage.

[0052] like Figure 2 As shown, a method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump includes the following steps:

[0053] 1) Construct the above-mentioned diaphragm pump hydraulic chamber propellant cooling system;

[0054] 2) The control module monitors the pump speed of the diaphragm pump in real time through an external drive mechanism;

[0055] 3) Determine if the pump speed is >5 SPM (Strokes per minute) through the control module; if yes, proceed to step 4); otherwise, the diaphragm pump is operating normally and does not require cooling of the propellant fluid, return to step 2).

[0056] 4) The control module starts the automatic oil draining program and delays for 10 minutes;

[0057] 5) If the control module does not receive the oil replenishment signal from the oil replenishment detector 8 triggered by the magnetic ring 10 within 10 minutes, then proceed to step 6); otherwise, clear the 10-minute delay and return to step 4.

[0058] 6) The control module opens the drain valve 12 to drain oil and continues for 0.5s. Within 0.5s, the propulsion fluid in the hydraulic chamber 6 automatically flows back to the oil tank 14 under high pressure. After the second preset time ends, the drain valve 12 automatically closes. At the same time, the oil replenishment detector 8 is monitored in real time to see if it sends an oil replenishment signal. Step 7) is executed.

[0059] 7) If the control module does not receive the oil replenishment signal from the oil replenishment detector 8 within 0.5s, then after the set oil draining time interval, return to step 6) every 5s, 9s, and 13s; if the control module receives the oil replenishment signal from the oil replenishment detector 8 within 0.5s, execute step 8).

[0060] 8) After receiving the oil replenishment signal from the oil replenishment detector 8 triggered by the magnetic ring 10, the control module controls the gear oil pump 13 and the oil replenishment valve 11 to replenish the propulsion fluid in the hydraulic chamber 6. During the replenishment of the propulsion fluid, the control module monitors in real time whether the oil drain detector (7) sends an oil drain signal. If there is an oil drain signal, the control module controls the oil drain valve (12) to open and drain the oil until the oil drain signal ends, thus completing the oil replacement and cooling of the propulsion fluid in the hydraulic chamber (6). Otherwise, step 9) is executed.

[0061] 9) If there is no oil drain signal, control the automatic oil drain program timing; if the control module receives an oil replenishment signal from the oil replenishment detector 8 within 60 minutes, reset the automatic oil drain program timing to zero, restart the timing to the third preset time, and return to step 4); otherwise, return to step 2).

[0062] In this embodiment, when the diaphragm pump is operating normally, if the pumping speed of the diaphragm pump is >5 SPM, the control module will start the automatic oil discharge program. If there is no oil replenishment signal within 10 minutes after the automatic oil discharge program is started, it is considered that oil can be discharged. The control module controls the oil discharge valve 12 to remain open for 0.5 seconds. The propellant in the hydraulic chamber 6 flows back to the oil tank 14 naturally under high pressure. According to the set oil discharge interval, the oil discharge valve 12 is started cyclically every 5 seconds, 9 seconds, and 13 seconds. This cycle will be repeated until the oil replenishment detector 8 is triggered. If there is an oil replenishment signal within 10 minutes after the automatic oil discharge program is started, the 10-minute delay is reset to zero, and the automatic oil discharge program is restarted.

[0063] After the initial automatic oil draining is completed, the oil replenishment detector 8 will trigger the timely replenishment of new propellant from the oil tank 14 into the hydraulic chamber 6, thereby achieving oil replacement and cooling of the propellant in the hydraulic chamber 6. Thereafter, the automatic oil draining program will repeat every 60 minutes.

[0064] During automatic oil draining, once the signal from oil replenishment detector 8 is detected, the program automatically switches to the next interval cycle, and the timer is reset to zero.

[0065] During the long-term continuous operation of the diaphragm pump, if the hydraulic chamber 6 is not replenished or drained for a long time, the automatic oil draining program will be automatically triggered and executed in a cycle, thereby achieving the purpose of cooling the propellant fluid by automatically draining oil, which is beneficial to extending the life of the diaphragm 3.

Claims

1. A method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump, characterized in that, Includes the following steps: 1) Construct a diaphragm pump hydraulic chamber propellant cooling system, the system including a diaphragm pump body (1) and a piston (5); The diaphragm pump body (1) includes a housing, a diaphragm chamber (2) disposed in the housing, a diaphragm (3) disposed in the diaphragm chamber (2), and a guide rod (4) connected to the diaphragm (3); one end of the piston (5) is connected to the end of the housing away from the diaphragm (3), and the other end of the piston (5) is used to connect to an external drive mechanism; the diaphragm (3), the housing, and the piston (5) form a hydraulic cavity (6); the diaphragm (3), the guide rod (4), the piston (5), and the hydraulic cavity (6) are coaxially arranged; the external drive mechanism causes the diaphragm (3) to move concave and convex through the piston (5) and the propellant in the hydraulic cavity (6), thereby driving the guide rod (4) connected to it to reciprocate along the axial direction in the hydraulic cavity (6); It also includes an oil tank (14), a magnetic ring (10), a control module, an oil drain detector (7), an oil replenishment detector (8), an oil replenishment valve (11), an oil drain valve (12), and a gear oil pump (13) that are electrically connected to the control module; the external drive mechanism is connected to the control module and is used to transmit the pumping speed of the diaphragm pump to the control module. The oil drain detector (7) and the oil replenishment detector (8) are sequentially arranged on the housing of the side wall of the hydraulic chamber (6) in a direction away from the diaphragm (3), and their detection ends are located inside the hydraulic chamber (6) and correspond to the guide rod (4); The magnetic ring (10) is coaxially disposed at one end of the guide rod (4) near the piston (5); The housing is connected to the oil tank (14) via an oil replenishment line (15) and an oil drain line (16); The gear oil pump (13) and the oil replenishment valve (11) are respectively installed on the oil replenishment pipeline (15) along the direction of the propulsion fluid flow; The oil drain valve (12) is installed on the oil drain pipeline (16); 2) The control module monitors the diaphragm pump speed in real time through an external drive mechanism; 3) Determine if the pump speed is >5 SPM using the control module; if yes, proceed to step 4); otherwise, return to step 2). 4) The control module starts the automatic oil draining program and delays for the first preset time; 5) If the control module does not receive the oil replenishment signal from the oil replenishment detector (8) triggered by the magnetic ring (10) within the first preset time, then proceed to step 6); otherwise, reset the first preset time delay to zero and return to step 4). 6) The control module opens the drain valve (12) to drain oil and continues for a second preset time. During the second preset time, the propulsion fluid in the hydraulic chamber (6) automatically flows back to the oil tank (14) under high pressure. After the second preset time ends, the drain valve (12) automatically closes. At the same time, the oil replenishment detector (8) is monitored in real time to see if it sends an oil replenishment signal, and step 7 is executed. 7) If the control module does not receive a replenishment signal from the replenishment detector (8) after the second preset time, it returns to step 6 after the set oil draining time interval; if the control module receives a replenishment signal from the replenishment detector (8) after the second preset time, it executes step 8); 8) After receiving the oil replenishment signal from the oil replenishment detector (8) triggered by the magnetic ring (10), the control module controls the gear oil pump (13) and the oil replenishment valve (11) to replenish the propulsion fluid in the hydraulic chamber (6). During the replenishment of the propulsion fluid, the control module monitors in real time whether the oil drain detector (7) sends an oil drain signal. If there is an oil drain signal, the control module controls the oil drain valve (12) to open and drain the oil until the oil drain signal ends, thus completing the oil replacement and cooling of the propulsion fluid in the hydraulic chamber (6). Otherwise, step 9 is executed. 9) If there is no oil discharge signal, control the automatic oil discharge program timing; if the control module receives an oil replenishment signal from the oil replenishment detector (8) within the third preset time, then reset the automatic oil discharge program timing to zero, restart the timing to the third preset time, and return to step 4). Otherwise, return to step 2).

2. The method for cooling the propulsion fluid in the hydraulic chamber of a diaphragm pump according to claim 1, characterized in that: The oil replenishment pipeline (15) is provided with a first check valve (17) and a pressure stabilizing tank (18) in sequence along the flow direction of the propellant fluid; the first check valve (17) and the pressure stabilizing tank (18) are located between the oil replenishment valve (11) and the gear oil pump (13); The first check valve (17) is used to prevent the propellant in the pressure tank (18) from flowing back to the oil tank (14) after the gear oil pump (13) stops working; The pressure tank (18) is used to buffer the propellant fluid that has been drawn in and pressurized from the oil tank (14).

3. A method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump according to claim 1 or 2, characterized in that: A filter (19) is provided between the oil tank (14) and the gear oil pump (13).

4. The method for cooling the propulsion fluid in the hydraulic chamber of a diaphragm pump according to claim 3, characterized in that: A second check valve (20) is provided on the drain line (16); the second check valve (20) is used to prevent the propellant fluid from entering the drain valve (12) and drain line (16) when the hydraulic chamber (6) is under negative pressure after the drain valve (12) is opened.

5. A method for cooling the propulsion fluid in the hydraulic chamber of a diaphragm pump according to claim 1, characterized in that: In step 4), the first preset time is 10 minutes.

6. A method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump according to claim 5, characterized in that, In step 5), the magnetic ring (10) triggers the refueling signal emitted by the refueling detector (8) as follows: When the axis of the magnetic ring (10) and the guide rod (4) is perpendicular to the central axis of the oil replenishment detector (8), the oil replenishment signal emitted by the oil replenishment detector (8) is triggered.

7. A method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump according to claim 6, characterized in that: In step 6), the second preset time is 0.5s.

8. A method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump according to claim 7, characterized in that: In step 7), the oil discharge time interval is 5s, 9s, or 13s.

9. A method for cooling the propellant fluid in the hydraulic chamber of a diaphragm pump according to claim 8, characterized in that: In step 8), the third preset time is 60 minutes.

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