Hydraulic pipeline oil string washing device

Abstract

The utility model belongs to the technical field of hydraulic pipe cleaning, and particularly discloses a hydraulic pipeline oil string washing device which comprises an oil tank, an oil supply pipeline, an oil inlet pipeline, an oil return pipeline and a cooling loop. The oil supply pipeline comprises a lightering oil pump, an oil supply valve and an oil supply main pipe; the oil inlet pipeline comprises a circulating oil pump, a first oil inlet header pipe and a first oil inlet control valve are arranged between the oil tank and the circulating oil pump, and a second oil inlet header pipe, a one-way valve and a second oil inlet control valve are arranged between the circulating oil pump and the cleaned pipeline system; the oil return pipeline comprises a fine filter, a first oil return header pipe is arranged between the cleaned pipeline system and the fine filter, a second oil return header pipe is communicated between the fine filter and the oil tank, first oil outlet control valves are arranged on the first oil return header pipe and the second oil return header pipe, the fine filter is further communicated with an impurity removal control valve, and the impurity removal control valve is communicated with an impurity removal header pipe. According to the device, safe and reliable cleaning can be provided for pipeline systems with different pressure bearing and precision requirements, and the oil temperature can be controlled to achieve the optimal cleaning effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic pipe cleaning technical field, concretely relates to a kind of hydraulic pipeline oil string washing device. BACKGROUND

[0002] String oil cleaning equipment is indispensable production service equipment in the production process of high-tech industries such as marine engineering, petroleum and petrochemical industry, aerospace, etc. The important role of string oil cleaning equipment is to ensure the high cleanliness of the pipeline. In the welding process of the pipeline, the inner wall of the pipeline will inevitably be contaminated. The main equipment connected to the pipeline, such as the engine, has very high requirements for the cleanliness of the medium flowing in the pipeline. Some pipelines even need to meet NAS1638, level 5, 1um according to the standard. Therefore, the inside of the pipeline needs to be cleaned after welding to ensure the medium cleanliness of the main components.

[0003] There is no string washing device in the prior art that can conveniently and quickly adjust the string washing pressure, oil pump flow and filter function according to the cleanliness level of the pipeline to be cleaned. It is difficult to ensure the cleanliness of the pipeline, which may affect the normal operation of the equipment and even cause irreparable damage.

[0004] In order to solve the problem that the string washing device in the prior art cannot conveniently and quickly adjust the string washing pressure, oil pump flow and cleanliness level, a more reasonable technical solution is needed to improve the structure of the string washing device and solve the current technical problem. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of hydraulic pipeline oil string washing device, can provide safe and reliable cleaning for different pressure and precision requirements of pipeline system, and can control oil temperature to achieve the best cleaning effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solution: a kind of hydraulic pipeline oil string washing device includes barge oil pump, oil tank, circulating oil pump and filter, the barge oil pump is communicated with the oil tank by oil supply main pipe, the oil supply main pipe is equipped with oil supply control valve;

[0007] The oil tank is communicated with the outside pipeline system to be cleaned by at least one oil inlet main pipe, one circulating oil pump is arranged on each oil inlet main pipe, a first oil inlet control valve is arranged on the pipeline between the circulating oil pump and the oil tank, a one-way valve and a second oil inlet control valve are sequentially arranged on the pipeline between the circulating oil pump and the outside pipeline system to be cleaned along the flow direction of oil, oil inlet pressure gauges and oil inlet pressure gauge valves are arranged at both ends of the circulating oil pump;

[0008] The external pipeline system to be cleaned is connected to the oil tank through at least one oil outlet main pipe. Each oil outlet main pipe is provided with a filter, a pressure sensor is provided in the filter, and a differential pressure gauge is connected in parallel at both ends of the filter. A first oil outlet control valve is provided on the pipeline between the filter and the external pipeline system to be cleaned, and a second oil outlet control valve is provided on the pipeline between the filter and the oil tank.

[0009] The filter is connected to a debris recovery container through a debris discharge main pipe, and a debris discharge control valve is provided on the debris discharge main pipe.

[0010] In order to better implement the present utility model, a liquid level detector, a temperature detector, a start controller, a stop controller, an alarm and a heater are provided in the oil tank, and the liquid level detector, temperature detector and heater are all arranged in the oil tank, wherein the liquid level detector is a liquid level gauge with a high and low level alarm, which is used to detect the current liquid level information of the oil, the temperature detector is used to detect the current temperature information of the oil, and the heater is used to heat the oil. The start controller is communicatively connected to the temperature detector and the heater to control the heater to perform the heating start work according to the current temperature information; the stop controller is communicatively connected to the temperature detector, the alarm and the heater to control the alarm and the heater to perform corresponding work according to the current temperature information;

[0011] An air filter is provided on the top of the oil tank, and an inspection channel and a discharge valve are provided on the side of the oil tank.

[0012] In order to better implement the present invention, a cooling circuit is provided at the bottom of the oil tank for reducing the oil temperature. A cooling pump is provided on the cooling circuit. Cooling water pressure gauges and cooling water pressure gauge valves are provided at both ends of the cooling pump. Cooling water control valves are provided at the water inlet and outlet ends of the cooling circuit.

[0013] In order to better implement the present invention, the first branch pipe, the second branch pipe, the pressure sensor, the pressure stabilizer, the flow detector and the third branch pipe are sequentially provided along the oil flow direction along the pipeline between the second oil inlet control valve and the external pipeline system to be cleaned.

[0014] In order to better implement the present invention, an emergency control valve is provided on the first branch pipe, and the other end is connected to the oil recovery container.

[0015] In order to better implement the present invention, an overflow valve is provided on the second branch pipe, and the other end is connected to the oil tank.

[0016] In order to better implement the present invention, a bypass valve is provided on the third branch pipe, and the other end is connected to the pipeline between the external pipeline system to be cleaned and the first oil outlet control valve.

[0017] For better implementation of the utility model, the pipeline between the external cleaned pipeline system and the third branch pipe is sequentially provided with a pressure sensor, a nitrogen filling valve, an oil outlet pressure gauge and an oil outlet pressure gauge valve along the flow direction of the oil.

[0018] For better implementation of the utility model, the pipeline between the third branch pipe and the first oil outlet control valve is communicated with a fourth branch pipe, the fourth branch pipe is provided with a third oil outlet control valve, and the other end is communicated with the lowest point of the external cleaned pipeline system.

[0019] For better implementation of the utility model, the pipeline between the second oil outlet control valve and the oil tank is communicated with a fifth branch pipe, the fifth branch pipe is sequentially provided with a pressure reducing valve, a detection control valve and a metal particle detector along the flow direction of the oil, and the other end of the fifth branch pipe is communicated with the oil tank.

[0020] Beneficial effects:

[0021] The utility model discloses a liquid level detector, temperature detector, start controller, stop controller, alarm and heater are set up, the liquid level detector, temperature detector and heater all set up in the oil tank, wherein, the liquid level detector selects the liquid level meter with high and low alarm, is used for detecting the current liquid level information of oil, the temperature detector is used for detecting the current temperature information of oil, the heater is used for heating oil, the start controller and stop controller all communication connection in temperature detector, alarm and heater, to correspondingly control alarm and heater executes corresponding work according to the current liquid level information and current temperature information, makes the cleaning oil reach the best temperature of impurity removal, the best flow, to guarantee the best impurity removal effect, but if oil temperature is too high for a long time, oil metamorphism is easy to cause, therefore through setting cooling circuit, can open cooling pump when oil temperature is too high, and the oil tank is cooled by pumping cold water, prevents oil metamorphism, improves the utilization of oil,

[0022] The oil after heating is pumped into the cleaned pipeline system by the circulating oil pump, before pumping, the pressure value of the overflow valve is set, the optimal pumping pressure and pumping flow can be set for the pipeline system with different pressure bearing capacity, and the practicability is high.

[0023] After cleaning, the oil is filtered through the precision filter, and the filtered oil is returned to the oil tank for recycling, and the impurities are discharged through the impurity discharge control valve, so that the required cleanliness is obtained, different cleaned pipeline systems can select different precision filter elements, so that the precision of the reference precision filter can be selected.

[0024] The oil backflowing from the fine filter to the oil tank can be detected by the metal particle on-line detector, so that the cleanliness of the filtered oil can be detected, and whether the filter element selected is reasonable and whether the required filtering effect can be achieved can be determined; whether the fine filter is faulty can also be detected.

[0025] After the cleaning is completed, the nitrogen filling valve is arranged, a nitrogen cylinder is connected to the nitrogen valve on the device, residual oil in the cleaned system is blown away by nitrogen, the oil drain port at the lowest point of the cleaned system pipeline is opened, and the residual cleaning oil in the pipeline is completely drained, so that the residual cleaning oil is effectively avoided, and the cleaning effect is ensured.

[0026] Before cleaning, the overflow valve and the bypass valve can work normally, the cleaning pressure is set according to the pressure bearing capacity of the cleaned pipeline system, and pressure gauges, pressure gauge valves and flow meters are arranged at the oil inlet and outlet ends of important components, so that the running conditions of various parts can be monitored in real time, and the safety of device operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure diagram of the serial cleaning device of the utility model;

[0028] Figure 2 It is a structure diagram of the oil supply pipeline and the oil tank of the utility model;

[0029] Figure 3 It is a structure diagram of the cooling circuit of the utility model;

[0030] Figure 4 It is a structure diagram of the oil inlet pipeline of the utility model;

[0031] Figure 5 It is a structure diagram of the oil return pipeline of the utility model;

[0032] In the figure: 1. Transfer oil pump; 2. Fuel tank; 3. Circulating oil pump; 4. Filter; 5. Oil supply main pipe; 6. Oil supply control valve; 7. Oil inlet main pipe; 8. First oil inlet control valve; 9. Check valve; 10. Second oil inlet control valve; 11. Oil inlet pressure gauge; 12. Oil inlet pressure gauge valve; 13. Oil outlet main pipe; 14. Pressure sensor; 15. Differential pressure gauge; 16. First oil outlet control valve; 17. Second oil outlet control valve; 18. Liquid level detector; 19. Temperature detector; 20. Start controller; 21. Stop controller; 22. Alarm; 23. Heater; 24. Air filter; 25. Inspection channel; 26. Drain valve; 27. Cooling circuit; 28. Cooling pump; 29. ​​Cooling pressure gauge; 30. Cooling pressure gauge valve; 31. Cooling water control valve; 32. Cooling water inlet pressure gauge; 33. First branch pipe; 34. Second branch pipe; 35. Pressure stabilizer; 36. Flow detector; 37. Third branch pipe; 38. Emergency control valve; 39. Overflow valve; 40. Pipe clamp; 41. Bypass valve; 42. Nitrogen charging valve; 43. Oil outlet pressure gauge; 44. Oil outlet pressure gauge valve; 45. Fourth branch pipe; 46. Third oil outlet control valve; 47. Drain main pipe; 48. Drain control valve; 49. Fifth branch pipe; 50. Pressure reducing valve; 51. Detection control valve; 52. Metal particle online detector. DETAILED DESCRIPTION

[0033] like Figure 1-Figure 5 As shown, it includes a movable oil transfer pump 1 (YTB-70, head 20m, adsorption height: 4m, flow rate: 70L / min, 1.5kW, 220V, 50Hz), an oil tank 2 (length 1500mm×width 1600mm×height 900mm, 2160L), a circulating oil pump 3 (HY280SCV-14-18, 406L / min, 10MPa) and a filter 4 (PLF-160XP single fine filter, accuracy 3μm). The oil transfer pump 1 is connected to the oil tank 2 through an oil supply main pipe 5 (DN25 PVC transparent hose). The oil supply main pipe 5 is provided with an oil supply control valve 6 (Class A stainless steel ball valve);

[0034] The oil tank 2 is connected to the external cleaning pipeline system through at least one oil inlet main pipe 7 (89×5Ⅱ grade refined stainless steel pipe), and each oil inlet main pipe 7 is provided with a circulating oil pump 3. A first oil inlet control valve 8 (DN80, 0.6MPa wafer-type stainless steel high-pressure ball valve) is provided on the pipeline between the circulating oil pump 3 and the oil tank 2. A one-way valve 9 (model DN50, opening 0.05MPa, maximum operating pressure 31.5MPa) and a second oil inlet control valve 10 (D250050G) are provided in sequence along the flow direction of the oil on the pipeline between the circulating oil pump 3 and the external cleaning pipeline system. CB / T3191-2013 stainless steel high-pressure ball valve), both ends of the circulating oil pump 3 are equipped with an oil inlet pressure gauge 11 and an oil inlet pressure gauge valve 12, the oil inlet end uses a YZC-100T-0.6-0.1MPa shock-resistant vacuum pressure gauge and an M27X1.5, 0.6MPa pressure gauge plug valve, and the oil outlet end uses a YC-100T-0.0-16MPa shock-resistant pressure gauge and a B100010G CB / T3191-2013 stainless steel high-pressure ball valve. The pumping pressure of the circulating oil pump 3 directly affects the effect of pipeline cleaning and the safety of various instrument components. Therefore, pressure gauges are set at the inlet and outlet ends of the circulating oil pump 3 to monitor the pump oil pressure in real time.

[0035] The external cleaned pipeline system is connected to the oil tank 2 through at least one oil outlet pipe 13 (60×5 grade II refined stainless steel pipe). Each oil outlet pipe 13 is equipped with a filter 4. The filter 4 is equipped with a pressure sensor 14 (YSZK-01A-CE, 0-16MPa single fine filter, DC24V, 4-20mA) to monitor the internal pressure of the filter 4 and the pressure before and after filtration to ensure the safe and stable operation of the filter 425.

[0036] A differential pressure gauge 15 (0-0.6 MPa) is connected in parallel to both ends of the filter 4. A first oil outlet control valve 16 is provided on the pipeline between the filter 4 and the external pipeline system to be cleaned. A second oil outlet control valve 17 (D250080G CB / T3191-2013 stainless steel high-pressure ball valve) is provided on the pipeline between the filter 4 and the oil tank 2.

[0037] To obtain the required cleanliness level, different pipeline systems to be cleaned can refer to Table 1 and select the reference filter 4 accuracy.

[0038] Table 1 Selection of fine filter accuracy

[0039]

[0040] The filter 4 is connected to the debris recovery container through a drainage main pipe 47 (DN25PVC transparent hose), and a drainage control valve 48 (B250010G CB / T3191-2013 stainless steel high-pressure ball valve) is provided on the drainage main pipe 47.

[0041] Preferably, the oil tank 2 is provided with a liquid level detector 18 (UHZ-512 type magnetic reprinted liquid level gauge with high and low level alarms), a temperature detector 19 (WTY type radial shock-resistant thermometer, 0-100°C), a start controller 20 (WZPK-23B-CDC24V, 4-20mA), a stop controller 21 (temperature adjustment range 0-90°C), an alarm 22 (temperature adjustment range 0-90°C) and a heater 23 (380V, 8kW). The liquid level detector 18, the temperature detector 19 and the heater 23 are all arranged in the oil tank 2. In the embodiment, the liquid level detector 18 is a liquid level gauge with a built-in high and low level alarm, which is used to detect the current liquid level information of the oil, the temperature detector 19 is used to detect the current temperature information of the oil, and the heater 23 is used to heat the oil. The start controller 20 is communicatively connected to the temperature detector 19 and the heater 23 to control the heater 23 to perform heating start work according to the current temperature information; the stop controller 21 is communicatively connected to the temperature detector 19, the alarm 22 and the heater 23 to control the alarm 22 and the heater 23 to perform corresponding work according to the current temperature information;

[0042] Previous experience shows that the oil temperature during cleaning is more suitable for mineral oil at 60°C, while meeting the requirements of easy operation. At this time, the viscosity of the oil is about 20 cSt. Through the above design, the oil temperature and oil volume in the oil tank 2 can be accurately controlled, and a warning can be issued and the heater 23 can be controlled to stop operating when the oil temperature or liquid level is abnormal, so as to ensure the cleanliness of the inner wall of the pipe of the cleaned system and the safety and stability of the cleaning process.

[0043] An air filter 24 (model: QUQ4, DN150) is provided on the top of the oil tank 2, and an inspection channel 25 and a discharge valve 26 (using a DN10 faucet) are provided on the side of the oil tank 2. The inspection channel 25 is closed with an A600X400CB / T19-2001 stainless steel manhole cover.

[0044] Preferably, a cooling circuit 27 is provided at the bottom of the oil tank 2 for reducing the oil temperature, and a cooling pump 28 (model: 40BZ-20, 20m 3 / h), cooling water pressure gauges and cooling water pressure gauge valves are provided at both ends of the cooling pump 28, the water inlet end adopts a YZC100T-0.6-0.1MPa vacuum pressure gauge and an M27X1.5, 0.6MPa pressure gauge valve, the water outlet end adopts a YC100T, 0-0.6MPa pressure gauge and an M27X1.5, 0.6MPa pressure gauge valve, the water inlet end and the water outlet end of the cooling circuit 27 are both provided with cooling water control valves 31, the water inlet end adopts a 60050GB / T585-2008 stainless steel stop check valve, and the water outlet end adopts a 160010GCB / T3191-2013 stop valve.

[0045] If the oil temperature is too high for a long time, it is easy to cause the oil to deteriorate. Therefore, by setting up a cooling circuit 27, the cooling pump 28 can be turned on when the oil temperature is too high to pump cold water to cool the oil tank 2, thereby preventing the oil from deteriorating and improving the utilization rate of the oil.

[0046] Preferably, a first branch pipe 33, a second branch pipe 34, a pressure sensor 14, a pressure stabilizer 35, a flow detector 36 (LAIKALWGY-80C05SSN secondary display, model DN80 intelligent flow meter, working pressure 16MPa) and a third branch pipe 37 are sequentially provided along the oil flow direction of the pipeline between the second oil inlet control valve 10 and the external pipeline system to be cleaned.

[0047] The oil inlet pumping pressure and flow rate of the pipeline being cleaned are monitored in real time through the pressure sensor 14, the voltage stabilizer 35 and the flow detector 36 so as to adjust and control them in time, thereby ensuring both the cleaning effect and the safety and stability of the pipeline cleaning process.

[0048] Preferably, an emergency control valve 38 (DN25 high pressure ball valve) is provided on the first branch pipe 33, and the other end is connected to an oil recovery container. The oil recovery container can be directly selected from the oil tank 2 or can be set separately.

[0049] Preferably, the second branch pipe 34 is provided with a relief valve 39 (model DBW20A-1-50B), and the other end is connected to the oil tank 2, and both ends of the relief valve 39 are provided with pipe clamps 40 (Td type CB / T3780-97 single pipe clamp 40).

[0050] If the pumping pressure is too high, the filter 4 is clogged, or other emergencies occur during the cleaning process, directly shutting down the circulating oil pump 3 will damage the pipeline or other components. The emergency control valve 38 can be opened to divert the pumped oil and relieve the pressure.

[0051] When this cleaning device leaves the factory, the set pressure of relief valve 39 is 10.5 MPa. If it is used to clean a system with a pressure level lower than 10 MPa, the opening pressure of relief valve 39 should be reset according to the operating pressure of the system being cleaned. The opening pressure of relief valve 39 is generally set to 1.1 times the operating pressure of the system being cleaned.

[0052] Method for setting the opening pressure of relief valve 39:

[0053] (1) First, fully open the relief valve 39 by turning the pressure regulating knob on the relief valve 39.

[0054] (2) Connect and seal all external pipes of this device with the blind plates provided.

[0055] (3) Open the first oil inlet control valve 8, the second oil inlet control valve 10, the bypass valve 41 on one of the oil inlet main pipes 7, and the first oil outlet control valve 16 and the second oil outlet control valve 17 on one of the oil outlet main pipes 13.

[0056] (4) Close the nitrogen filling valve 42 and the detection control valve 51 at the inlet of the metal particle detector.

[0057] (5) Start an oil pump and observe that the oil pressure should be 0 MPa.

[0058] (6) Gradually close the bypass valve 41 and observe that the oil pressure should remain at 0 MPa. A pressure increase of less than 0.5 MPa is permitted. If the oil pressure continues to increase, stop the pump and check whether the relief valve 39 is fully open or damaged or stuck. Only proceed to the next test setting after the problem is eliminated.

[0059] (7) Gradually and slowly close the relief valve 39. When the required pressure is reached, stop turning the pressure regulating knob. Turn the locking nut on the pressure regulating knob until it fits against the valve body and lock the pressure regulating knob. The set pressure of the relief valve 39 is now the maximum operating pressure of the system.

[0060] (8) Open all external pipes of this device and the system voltage regulation setting is completed.

[0061] Preferably, a bypass valve 41 (D250050G CB / T3191-2013, stainless steel high-pressure ball valve) is provided on the third branch pipe 37 , and the other end thereof is connected to the pipeline between the external pipeline system to be cleaned and the first oil outlet control valve 16 .

[0062] In order to ensure the safety and stability of the cleaning process, a test run needs to be carried out before cleaning to find the best cleaning pressure. The specific operation is as follows: in addition to opening the first oil inlet control valve 8, the second oil inlet control valve 10, and the first oil outlet control valve 16 and the second oil outlet control valve 17 before cleaning, the bypass valve 41 on the third branch pipe 37 is also opened. At this time, part of the cleaning oil will flow back to the oil tank 2 from the third branch pipe 37, and the oil entering the cleaned pipeline system from the oil inlet pipeline is less than 30%. The frequency is gradually loaded to 100% rated flow operating condition. Every 30 minutes during operation, check and record the operating parameters and instrument display data.

[0063] Preferably, along the flow direction of the oil, a pressure sensor 14, a nitrogen filling valve 42 (250010G CB / T3191-2013, high-pressure stop valve), an oil outlet pressure gauge 43 (YC-100T 0.0-16MPa shock-resistant pressure gauge), and an oil outlet pressure gauge valve 44 (B100010G CB / T3191-2013 stainless steel high-pressure ball valve) are sequentially arranged on the pipeline between the external cleaned pipeline system and the third branch pipe 37.

[0064] The above technical solution can monitor the oil outlet pressure of the cleaned pipeline in real time to ensure the stability of the cleaning process. After cleaning is completed, the nitrogen filling valve 42 on the device is connected to a nitrogen cylinder. The residual oil in the cleaned system is blown away with nitrogen, and then the oil drain port at the lowest point of the cleaned system pipeline is opened to completely discharge the cleaning oil remaining in the pipeline.

[0065] Preferably, a fourth branch pipe 45 is connected to the pipeline between the third branch pipe 37 and the first oil outlet control valve 16, a third oil outlet control valve 46 (DN25 high-pressure ball valve) is arranged on the fourth branch pipe 45, and the other end is connected to the lowest point of the external cleaned pipeline system.

[0066] The above technical solution can completely discharge the cleaning oil remaining in the pipeline by blowing the residual oil in the cleaned system with nitrogen through the fourth branch pipe 45.

[0067] Preferably, a fifth branch pipe 49 is connected to the pipeline between the second oil outlet control valve 17 and the oil tank 2, a pressure reducing valve 50 (10MPa-1MPa), a detection control valve 51 (160010G CB / T3191-2013, stainless steel stop valve), and a metal particle detector are sequentially arranged on the fifth branch pipe 49 along the flow direction of the oil, and the other end of the fifth branch pipe 49 is connected to the oil tank 2.

[0068] The cleanliness of the oil filtered by the filter 4 can be detected to determine whether the filter 4 filter element is reasonably selected and whether the required filtering effect can be achieved.

[0069] Working principle:

[0070] (1) Figure 1 As shown, first connect the device to the pipeline system to be cleaned to form a complete loop;

[0071] (2) Connect the external power supply of this device:

[0072] Confirm that the voltage and phase sequence of the external power supply are correct. Power supply: three-phase voltage AC380V / 50Hz, three-phase four-wire system, and the phase sequence ensures that the motor rotation direction is correct.

[0073] (3) Confirm the set pressure of relief valve 39:

[0074] Confirm that the set pressure of the relief valve 39 is 1.1 times the working pressure of the system to be cleaned. If not, the cleaning pressure should be reset.

[0075] (4) Open the oil supply control valve 6 and fill the oil tank 2 with oil through the transfer oil pump 1;

[0076] (5) Inspection of piping system before startup:

[0077] ① Before cleaning begins, close all oil inlets and return ports of the system being cleaned.

[0078] ② Keep the two first oil outlet control valves 16 and the second oil outlet control valve 17 of one filter 4 open, while the first oil outlet control valve 16 and the second oil outlet control valve 17 of the other filter 4 are closed.

[0079] ③ Keep the first oil inlet control valve 8 and the second oil inlet control valve 10 of one circulating oil pump 3 open, and keep the other circulating oil pump 3 closed.

[0080] ④Open the bypass valve 41.

[0081] ⑤ Check that the nitrogen charging valve 42, the third oil outlet control valve 46, and the impurity discharge control valve 48 are in the closed state, and all pressure gauge valves are in the open state.

[0082] ⑥ Check that the cooling water control valve 31 is in the open state.

[0083] ⑦ Check that the filter element in filter 4 matches the system filtration level.

[0084] ⑧ Disconnect the connecting pipeline between the pressure stabilizer 35 and the oil inlet main pipe 7.

[0085] ⑨ The detection control valve 51 at the inlet of the metal particle online detector 52 is in a closed state, and the handle of the pressure reducing valve 50 is kept in a position where the outlet pressure is 0.

[0086] (6) Check the electrical system by powering on:

[0087] Power is supplied to the control panel through the distribution box, the control panel is turned on, and the touch screen interface is entered. The distribution box and the control panel are not shown in the drawings. The distribution box and the control panel are selected and installed by those skilled in the art using existing technologies:

[0088] ① In static state, check that the displayed data of all thermal instruments such as flow detectors, liquid level detectors, pressure gauges, temperature detectors, etc. are normal.

[0089] ② Check that the protection setting values ​​of all sensors are correct and the alarms are working normally.

[0090] ③ Check that the power supply of equipment such as the circulating oil pump 3, heater 23, and metal particle online detector 52 is normal.

[0091] ④ Check that the overflow valve 39 operates normally.

[0092] (7) Self-operation inspection of this device:

[0093] ① Heater 23 trial operation:

[0094] The operation method of a single heater 23 is as follows: Press a heating button on the touch screen (not shown in the figure, it is conventionally designed according to actual needs with the operating table) to start heating. After heating for 15 minutes, observe that the oil temperature should rise to confirm that the heater 23 is in good condition. Press the stop button again to stop the heater 23 from heating.

[0095] ②Oil pump trial run:

[0096] After confirming that the above steps (1)-(7) are completed, one of the circulating oil pumps 3 can be started.

[0097] Special Note: Before starting the oil pump, be sure to check that the second oil inlet control valve 10 is open. If the second oil inlet control valve 10 is closed and the circulating oil pump 3 is running, it will cause back pressure in the circulating oil pump 3 and cause damage to the pump. Therefore, under any circumstances, the second oil inlet control valve 10 should be kept open and a warning operation sign should be hung.

[0098] Before starting the circulating oil pump 3, check that the first oil inlet control valve 8 is fully open before starting the motor. The motor is a standard component of the circulating oil pump and is not shown in the accompanying drawings. Start the motor first, check that the motor is rotating in the correct direction (clockwise when viewed from the rear end), that the flow rate detector 36 is displaying data, and that there is no sudden increase in pressure. Press the start button once to start the motor, let it run for a few seconds, then press it again to stop.

[0099] Only one of the two circulating oil pumps 3 can be operated at the same time. After one motor is operated, the other motor cannot be started to prevent the pressure from exceeding the limit and damaging the system.

[0100] Bypass operation test inspection: 1) Open the bypass valve 41. 2) Disconnect all inlet and outlet pipes on the system to be cleaned and this equipment. 3) Test run one of the oil pumps for 3 minutes at below 30% of the rated flow rate, check that the operating parameters and instrument displays are normal, and that there is no leakage in the system. 4) On the operating table, adjust the speed of the variable frequency motor (the variable frequency motor is a supporting equipment for the oil tank, mainly used to control the amount of oil in the oil tank supplied to the oil inlet main pipe, not shown in the attached figure), gradually adjust the frequency and load it to 100% of the rated flow condition, test run the oil pump running in the above "3)" for 5 minutes, and check that the operating parameters and instrument displays are normal. 5) After the operation is checked and there are no problems, put it into cleaning operation.

[0101] Note: A bypass test run is required before each cleaning.

[0102] (8) Cleaning operation:

[0103] ① Before cleaning, confirm that the pressure test of the pipeline system to be cleaned has been completed.

[0104] ② After confirming that the oil inlet main pipe 7 is well sealed, the first oil outlet control valve 16 and the second oil outlet control valve 17 are in the open state, and the first oil inlet control valve 8 and the second oil inlet control valve 10 are in the open state, you can start a circulating oil pump for cleaning (the other cleaning oil pump is used as a backup).

[0105] ③ Heater 23 is put into operation to heat the oil in tank 2. When the oil temperature reaches the factory set temperature, heater 23 automatically stops heating. If the oil temperature is lower, the three heaters 23 will operate simultaneously until the oil temperature reaches 60℃±5℃.

[0106] Note: To prevent the cleaning oil from deteriorating due to long-term high-temperature use, it is recommended to set the oil temperature at 40℃±5℃.

[0107] ④ Open the bypass valve 41, part of the cleaning oil enters the system to be cleaned and starts circulating cleaning. Close the bypass valve 41, all the cleaning oil enters the system to be cleaned and starts circulating cleaning.

[0108] First operate below 30% of the rated flow, then gradually adjust the frequency and load to 100% of the rated flow. During the operation, check and record the operating parameters and instrument display data every 30 minutes.

[0109] ⑤ When cleaning, first use a 25um filter element for cleaning. After cleaning for about 2 hours, depending on the contamination of the pipeline, you can replace it with a 10um filter element and clean it again for about 2 hours, then replace it with a 3um filter element and clean it again. The cleaning time can be appropriately adjusted according to the length of the pipeline to be cleaned.

[0110] ⑥ During the cleaning process, if the pressure differential signal generator of the filter 4 is activated and lasts for three seconds or the liquid level is too high, the alarm 22 will sound an alarm, but the machine will continue to operate;

[0111] If the over-temperature alarm condition occurs and lasts for three seconds, the alarm 22 sounds an alarm, the corresponding indicator light lights up, and the heater 23 stops running.

[0112] If the liquid level is too low and lasts for three seconds, the liquid level detector with high and low liquid level alarm function will sound an alarm, and the corresponding indicator light will light up, and the circulating oil pump 3 will stop running.

[0113] Can press the silence button once now, alarm 22 just stops buzzing. After troubleshooting, press the silence button once again to reset.

[0114] ⑦ During the cleaning process, if the differential pressure signal generator on the filter 4 emits an audible and visual alarm, it means that the filter element is blocked. You should promptly switch to another filter 4 for use and continue cleaning. Close the first oil outlet control valve 16 and the second oil outlet control valve 17 at the inlet and outlet ends of the filter 4 to be cleaned, open the cover of the filter 4, pull out the filter element inside, and then install it into the filter 4 after cleaning it (note that the prominent red button on the differential pressure signal generator should be manually reset).

[0115] ⑧The operating procedures and precautions during the use of filter 4 are:

[0116] (a) During the initial operation of the filter 4 or after cleaning the filter element, care should be taken to evacuate the air from the filter canister. This means unscrewing the bleed screw plug at the top of the filter 4. After continuous oil flow is observed from the screw hole, tighten the bleed screw plug. The filter canister, bleed screw plug, and screw hole are all components of the filter 4 and are not shown in the accompanying drawings.

[0117] (b) When cleaning the filter element, first stop the system or close the first oil outlet control valve 16 and the second oil outlet control valve 17. Then loosen the bleed screw on the top of the filter to eliminate the pressure in the filter canister. Then unscrew the drain screw at the bottom. After the residual oil in the upper part of the filter canister compartment is completely drained, loosen the captive bolts on the filter cover, and then use the cover screw to lift the filter cover. Unscrew it, pull out the dirty filter element, and clean it. After completion, install the filter cover, tighten the captive bolts on the filter cover, and then tighten the bleed and drain screws. Pay attention to the exhaust operation in the filter canister when it is running again. As mentioned above, the cleaning of the filter element of filter 4 is a routine operation. The relevant structure is not shown in detail in the attached figure.

[0118] (C) If the pressure is higher than the set value but the relief valve 39 still does not operate, or the temperature control fails, or there is a serious leak, or the motor fails, etc., you can immediately press the "Emergency Stop Button" to stop the pump. The emergency stop button is a conventional setting for stopping the pump operation, which is not shown in detail in the figure.

[0119] ⑨After cleaning for a period of time, the contamination level of the return oil can be checked by sampling and testing. If the inspection results show that the contamination level of the return oil has met the requirements, the cleaning process can be stopped and the cleaning process is completed.

[0120] After cleaning, nitrogen is introduced from the nitrogen charging valve 42 to blow the residual oil in the pipeline back to the oil tank 2, and then the nitrogen charging valve 42 is closed, and the covers on all the oil inlet and outlet ports are returned to their original positions, and the relevant auxiliary pipelines can be removed.

[0121] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A hydraulic pipeline oil washing device, characterized in that: The oil transfer system comprises a transfer oil pump (1), an oil tank (2), a circulating oil pump (3) and a filter (4); the transfer oil pump (1) is connected to the oil tank (2) via an oil supply main pipe (5); and an oil supply control valve (6) is provided on the oil supply main pipe (5); The oil tank (2) is connected to an external pipeline system to be cleaned through at least one oil inlet main pipe (7), each oil inlet main pipe (7) is provided with a circulating oil pump (3), a first oil inlet control valve (8) is provided on the pipeline between the circulating oil pump (3) and the oil tank (2), a one-way valve (9) and a second oil inlet control valve (10) are provided in sequence along the flow direction of the oil on the pipeline between the circulating oil pump (3) and the external pipeline system to be cleaned, and an oil inlet pressure gauge (11) and an oil inlet pressure gauge valve (12) are provided at both ends of the circulating oil pump (3); The external pipeline system to be cleaned is connected to the oil tank (2) through at least one oil outlet main pipe (13), each oil outlet main pipe (13) is provided with a filter (4), a pressure sensor (14) is provided in the filter (4), and a differential pressure gauge (15) is connected in parallel at both ends of the filter (4). A first oil outlet control valve (16) is provided on the pipeline between the filter (4) and the external pipeline system to be cleaned, and a second oil outlet control valve (17) is provided on the pipeline between the filter (4) and the oil tank (2); The filter (4) is connected to a debris recovery container via a debris discharge main pipe (47), and a debris discharge control valve (48) is provided on the debris discharge main pipe (47).

2. A hydraulic pipeline oil washing device according to claim 1, characterized in that: The oil tank (2) is provided with a liquid level detector (18), a temperature detector (19), a start controller (20), a stop controller (21), an alarm (22) and a heater (23). The liquid level detector (18), the temperature detector (19) and the heater (23) are all arranged in the oil tank (2). The liquid level detector (18) is a liquid level gauge with a high and low level alarm, which is used to detect the current liquid level information of the oil. The temperature detector (19) is used to detect the current temperature information of the oil. The heater (23) is used to heat the oil. The start controller (20) is communicatively connected to the temperature detector (19) and the heater (23) to control the heater (23) to perform heating start work according to the current temperature information. The stop controller (21) is communicatively connected to the temperature detector (19), the alarm (22) and the heater (23) to control the alarm (22) and the heater (23) to perform corresponding work according to the current temperature information. An air filter (24) is provided on the top of the oil tank (2), and an inspection channel (25) and a discharge valve (26) are provided on the side of the oil tank (2).

3. The hydraulic pipeline oil washing device according to claim 1, characterized in that: A cooling circuit (27) is provided at the bottom of the oil tank (2) for reducing the oil temperature. A cooling pump (28) is provided on the cooling circuit (27). Both ends of the cooling pump (28) are provided with a cooling water pressure gauge and a cooling water pressure gauge valve. A cooling water control valve (31) is provided at both the water inlet and the water outlet of the cooling circuit (27).

4. The hydraulic pipeline oil washing device according to claim 1, characterized in that: A first branch pipe (33), a second branch pipe (34), a pressure sensor (14), a pressure stabilizer (35), a flow detector (36) and a third branch pipe (37) are sequentially provided along the oil flow direction on the pipeline between the second oil inlet control valve (10) and the external pipeline system to be cleaned.

5. The hydraulic pipeline oil washing device according to claim 4, characterized in that: An emergency control valve (38) is provided on the first branch pipe (33), and the other end is connected to an oil recovery container.

6. The hydraulic pipeline oil washing device according to claim 4, characterized in that: The second branch pipe (34) is provided with an overflow valve (39), and the other end is connected to the oil tank (2). Both ends of the overflow valve (39) are provided with pipe clamps (40).

7. The hydraulic pipeline oil washing device according to claim 4, characterized in that: The third branch pipe (37) is provided with a bypass valve (41), and the other end thereof is connected to the pipeline between the external pipeline system to be cleaned and the first oil outlet control valve (16).

8. The hydraulic pipeline oil washing device according to claim 7, characterized in that: A pressure sensor (14), a nitrogen filling valve (42), an oil outlet pressure gauge (43) and an oil outlet pressure gauge valve (44) are sequentially provided along the oil flow direction of the pipeline between the external cleaned pipeline system and the third branch pipe (37).

9. The hydraulic pipeline oil washing device according to claim 7, characterized in that: A fourth branch pipe (45) is connected to the pipeline between the third branch pipe (37) and the first oil outlet control valve (16). The fourth branch pipe (45) is provided with a third oil outlet control valve (46), and the other end of the fourth branch pipe is connected to the lowest point of the external pipeline system to be cleaned.

10. The hydraulic pipeline oil washing device according to claim 1, characterized in that: A fifth branch pipe (49) is connected to the pipeline between the second oil outlet control valve (17) and the oil tank (2). The fifth branch pipe (49) is provided with a pressure reducing valve (50), a detection control valve (51) and a metal particle detector in sequence along the flow direction of the oil. The other end of the fifth branch pipe (49) is connected to the oil tank (2).

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