Multi-stage filtering and heating device for high-viscosity oil liquid

Abstract

The utility model relates to the technical field of hydraulic oil, in particular to a multi-stage filtering and heating device for high-viscosity oil. Comprising an oil tank, an oil outlet pipeline is arranged on the oil tank and communicated with an inner cavity of the oil tank, and a circulating pump is arranged on the oil outlet pipeline; an outlet of the oil outlet pipeline is provided with a bypass pipeline and a filtering pipeline which are connected in parallel, the bypass pipeline is provided with an electric bypass valve, and the filtering pipeline is provided with a filtering device; the output end of the filtering pipeline and the output end of the bypass pipeline are converged and connected with a heating pipeline, a heater and a cooler are arranged on the heating pipeline, a backflow pipeline is arranged at the output end of the heating pipeline, and the output end of the backflow pipeline is communicated with an inner cavity of the oil tank. According to the utility model, the oil in the oil tank circularly flows through the circulating pump, the high-viscosity oil is filtered by adopting the filtering device, and the cooling of the oil of the system is controlled through the cooler; and the oil liquid is heated through the heater.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil, in particular to a high-viscosity oil multi-stage filtering and heating device. Background Art

[0002] Usually, high-viscosity hydraulic pressure systems at home and abroad use a primary circulation filter oil. Since the components of the hydraulic system have high requirements for oil cleanliness, especially the proportional valve and servo valve have more stringent requirements for oil cleanliness, most of the faults in the hydraulic system are caused by oil contamination. At the same time, since the geographical location will affect the temperature of the oil, the oil temperature will also change during the working process. When the oil temperature is low, the oil viscosity is high, and the oil cannot pass through the filter normally, resulting in high system pressure; when the oil temperature is high, the oil viscosity is low, and the oil can pass through the filter normally, but the high temperature of the oil will reduce the efficacy, making the equipment slow and weak, and reducing the workmanship efficiency. Therefore, it is necessary to design a special equipment for multi-stage filtration and heating of high-viscosity oil to achieve one-time rapid multi-stage filtration of high-viscosity oil and adjust the oil temperature. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-viscosity oil multi-stage filtering and heating device, which is used for filtering the high-viscosity oil and adjusting the oil temperature.

[0004] The technical solution adopted by the utility model to solve its technical problems is a high-viscosity oil multi-stage filtering and heating device, comprising an oil tank, an oil outlet pipeline is arranged on the oil tank, the oil outlet pipeline is communicated with the inner cavity of the oil tank, and a circulating pump is arranged on the oil outlet pipeline; a bypass pipeline and a filter pipeline in parallel are arranged at the outlet of the oil outlet pipeline, an electric bypass valve is arranged on the bypass pipeline, and a filtering device is arranged on the filter pipeline; the output end of the filter pipeline and the output end of the bypass pipeline are merged and connected with the heating pipeline, a heater and a cooler are arranged on the heating pipeline, and a reflux pipeline is arranged at the output end of the heating pipeline, and the output end of the reflux pipeline is communicated with the inner cavity of the oil tank.

[0005] Furthermore, an electronic temperature relay is provided on the oil tank.

[0006] Furthermore, a pressure detection element is provided at the output end of the oil outlet pipeline, a safety pipeline is provided between the pressure detection element and the circulation pump, one end of the safety pipeline is connected to the oil outlet pipeline, and the other end is connected to the inner cavity of the oil tank, and a safety valve is provided on the safety pipeline.

[0007] Furthermore, a temperature detection element is provided at the output end of the oil outlet pipeline.

[0008] Furthermore, a liquid level gauge is provided on the oil tank.

[0009] Furthermore, a ventilation device is provided on the oil tank.

[0010] Furthermore, the filtering device includes a coarse-precision filter, a medium-precision filter and a high-precision filter which are sequentially arranged on the filtering pipe.

[0011] Furthermore, a flow meter is provided on the return pipe, and a check valve is provided between the flow meter and the oil tank.

[0012] Furthermore, the working medium of the cooler is water, and the cooler is provided with a water inlet pipe and a water outlet pipe, and the water outlet pipe is provided with an electromagnetic water valve.

[0013] The beneficial effects of the utility model are as follows: the oil in the oil tank is circulated by a circulating pump, a filtering device is used to filter the high-viscosity oil, a bypass pipe is used, and a bypass valve is arranged on the bypass pipe to achieve pressure relief when the viscosity of the oil is high; the cooling of the system oil is controlled by a cooler; the heating of the oil is achieved by a heater; an electric bypass valve is used to achieve smooth flow of low-temperature oil. When the oil is at a low temperature, the viscosity is high, and it is difficult for the oil to pass through the filter, resulting in high pressure loss, so that the outlet pressure of the circulating pump is relatively high. When the electric bypass valve is opened, the oil does not pass through the filter, and directly enters the heater from the electric bypass valve for heating. After the temperature rises, the viscosity of the oil decreases, and the electric bypass valve is closed again, thereby ensuring the cleanliness of the system oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure markings: 1-oil tank; 2-oil outlet pipeline; 3-circulation pump; 4-bypass pipeline; 5-filter pipeline; 6-electric bypass valve; 7-heating pipeline; 8-heater; 9-cooler; 10-return pipeline; 11-electronic temperature relay; 12-pressure detection element; 13-safety pipeline; 14-safety valve; 15-temperature detection element; 16-liquid level gauge; 17-ventilation device; 18-coarse-precision filter; 19-medium-precision filter; 20-high-precision filter; 21-flow meter; 22-check valve; 23-water inlet pipe; 24-water outlet pipe; 25-electromagnetic water valve. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] like Figure 1As shown, the utility model high-viscosity oil multi-stage filtering and heating device comprises an oil tank 1, the oil tank 1 is provided with an oil outlet pipe 2, the oil outlet pipe 2 is communicated with the inner cavity of the oil tank 1, and a circulating pump 3 is provided on the oil outlet pipe 2; the outlet of the oil outlet pipe 2 is provided with a bypass pipe 4 and a filtering pipe 5 in parallel, the bypass pipe 4 is provided with an electric bypass valve 6, and the filtering pipe 5 is provided with a filtering device; the output end of the filtering pipe 5 and the output end of the bypass pipe 4 are merged and connected with the heating pipe 7, the heating pipe 7 is provided with a heater 8 and a cooler 9, the output end of the heating pipe 7 is provided with a reflux pipe 10, and the output end of the reflux pipe 10 is communicated with the inner cavity of the oil tank 1.

[0018] Among them, the oil tank 1 is a rectangular box made of stainless steel, which is used to store oil. The circulating pump 3 is used to pump the oil in the oil tank 1 into the oil outlet pipeline 2; the outlet of the oil outlet pipeline 2 is provided with a bypass pipeline 4 and a filter pipeline 5 in parallel, that is, the inlets of the bypass pipeline 4 and the filter pipeline 5 are connected to the outlet of the oil outlet pipeline 2; the function of the electric bypass valve 6 is to control the on-off of the bypass pipeline 4. When the oil temperature is low, the electric bypass valve 6 is opened, and the oil passes through the bypass pipeline 4. When the oil temperature is high, the electric bypass valve 6 is closed, and the oil does not pass through the bypass pipeline 4. The filtering device is used to filter the oil, and filter out water rust, casting sand, welding slag, iron filings, coatings, paint skins and cotton yarn scraps in the oil; the output end of the filter pipe 5 and the output end of the bypass pipe 4 are merged and connected to the heating pipe 7. In this way, the oil can enter the heating pipe 7 regardless of whether it passes through the filter pipe 5 or the bypass pipe 4; the heater 8 is used to heat the oil, and electric heating or gas heating can be used; the cooler 9 is used to cool the oil, and water cooling or air cooling can be used; the reflux pipe 10 is used to return the oil to the oil tank 1.

[0019] The specific operation process of this utility model:

[0020] Before working, the oil in the oil tank 1 is at room temperature, and the circulating pump 3 draws oil from the hydraulic oil tank 1, and the oil enters the oil outlet pipe 2. When the oil temperature is lower than the system set value T1, T1 here can be a specific temperature value or a temperature range. If it is a temperature range, lower than the system set value T1 is lower than the lowest value of the temperature range, and higher than the system set value T1 is higher than the highest value of the temperature range; at this time, the oil viscosity is high, and the oil cannot pass through the filtering device normally, resulting in high system pressure. The electric bypass valve 6 is opened, and the oil passes through the bypass pipe 4. The system pressure is normal, and the oil enters the heating pipe 7. The heater 8 on the heating pipe 7 heats the oil. At this time, the cooler 9 does not work, and then returns to the oil tank 1 through the reflux pipe 10; when the oil temperature is heated to the system set value T1, the circulating pump 3 draws oil from the hydraulic oil tank 1. 1, the oil enters the oil outlet pipe 2, at this time, the oil viscosity decreases, the electric bypass valve 6 is powered off to close the bypass pipe 4, the oil flows into the filter pipe 5, is filtered by the filter device, and enters the heating pipe 7, the heater 8 on the heating pipe 7 is powered on, and the oil continues to heat to reach the normal working oil temperature of the system, at this time the cooler 9 does not work, and then returns to the oil tank 1 through the return oil pipe; when the oil temperature is higher than the system set value T1, the circulation pump 3 sucks oil from the hydraulic oil tank 1, and the oil enters the oil outlet pipe 2, at this time the oil viscosity decreases, the electric bypass valve 6 is powered off to close the bypass pipe 4, the oil flows into the filter pipe 5, is filtered by the filter device, and enters the heating pipe 7; the heater 8 is powered off, at this time the cooler 9 works to cool the oil in the heating pipe 7, and the cooled oil flows back to the oil tank 1 through the return pipe 10.

[0021] In order to accurately understand the temperature of the oil in the oil tank 1, the oil tank 1 is further provided with an electronic temperature relay 11. The electronic temperature relay 11 reflects the temperature of the oil in the oil tank 1, and controls the opening and closing of the electric bypass valve 6, the opening and closing of the heater 8, and the opening and closing of the cooler 9 according to the displayed temperature of the electronic temperature relay 11.

[0022] In order to prevent the excessive pressure in the oil outlet pipeline 2 from affecting the oil outlet pipeline 2, further, a pressure detection element 12 is provided at the output end of the oil outlet pipeline 2, and a safety pipeline 13 is provided between the pressure detection element 12 and the circulation pump 3. One end of the safety pipeline 13 is connected to the oil outlet pipeline 2, and the other end is connected to the inner cavity of the oil tank 1. A safety valve 14 is provided on the safety pipeline 13. The pressure detection element 12 can be a pressure sensor, such as a strain gauge pressure sensor or a ceramic pressure sensor. When the pressure in the oil outlet pipeline 2 is too high, the pressure detection element 12 sends a signal, and the safety valve 14 opens, allowing the oil to flow back to the oil tank 1 through the safety pipeline 13.

[0023] In order to know the temperature of the output end of the oil outlet pipeline 2 in real time, further, the output end of the oil outlet pipeline 2 is provided with a temperature detection element 15. The temperature detection element 15 can be an electronic thermometer.

[0024] In order to understand the amount of oil in the oil tank 1 and replenish the oil in time after the oil is consumed, a liquid level meter 16 is further provided on the oil tank 1.

[0025] When the oil needs to be pumped out after use, or when the oil is being refilled, the pressure in the oil tank 1 will change. In order to balance the pressure in the oil tank 1, a vent 17 is further provided on the oil tank 1. The vent 17 connects the outside with the inner cavity of the oil tank 1 to balance the internal pressure of the oil tank 1.

[0026] In order to better filter the oil, the filtering device further comprises a coarse precision filter 18, a medium precision filter 19 and a high precision filter 20 which are sequentially arranged on the filter pipe 5. The coarse precision filter 18 is used to filter impurities with a diameter d≥0.1mm in the oil, the medium precision filter 19 is used to filter impurities with a diameter d≥0.01mm in the oil, and the high precision filter 20 is used to filter impurities with a diameter d≥0.001mm in the oil.

[0027] In order to prevent the oil in the oil tank 1 from flowing back from the oil tank 1 to the reflux pipe 10 , further, a flow meter 21 is provided on the reflux pipe 10 , and a check valve 22 is provided between the flow meter 21 and the oil tank 1 .

[0028] Furthermore, the working medium of the cooler 9 is water, and a water inlet pipe 23 and a water outlet pipe 24 are provided on the cooler 9, and an electromagnetic water valve 25 is provided on the water outlet pipe 24. When the oil needs to be cooled, the electromagnetic water valve 25 is opened to introduce water into the cooler 9 to cool the oil, and when the oil does not need to be cooled, the electromagnetic water valve 25 is closed.

[0029] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-viscosity oil multi-stage filtering and heating device, comprising an oil tank (1), wherein the oil tank (1) is provided with an oil outlet pipeline (2), wherein the oil outlet pipeline (2) is communicated with the inner cavity of the oil tank (1), and wherein a circulating pump (3) is provided on the oil outlet pipeline (2); characterized in that: The outlet of the oil outlet pipeline (2) is provided with a bypass pipeline (4) and a filter pipeline (5) connected in parallel, the bypass pipeline (4) is provided with an electric bypass valve (6), and the filter pipeline (5) is provided with a filter device; the output end of the filter pipeline (5) and the output end of the bypass pipeline (4) are merged and connected to the heating pipeline (7), the heating pipeline (7) is provided with a heater (8) and a cooler (9), the output end of the heating pipeline (7) is provided with a return pipeline (10), and the output end of the return pipeline (10) is communicated with the inner cavity of the oil tank (1).

2. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: The oil tank (1) is provided with an electronic temperature relay (11).

3. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: A pressure detection element (12) is provided at the output end of the oil outlet pipeline (2), a safety pipeline (13) is provided between the pressure detection element (12) and the circulation pump (3), one end of the safety pipeline (13) is connected to the oil outlet pipeline (2), and the other end is communicated with the inner cavity of the oil tank (1), and a safety valve (14) is provided on the safety pipeline (13).

4. The high-viscosity oil multi-stage filtering and heating device according to claim 3, characterized in that: The output end of the oil outlet pipeline (2) is also provided with a temperature detection element (15).

5. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: The oil tank (1) is provided with a liquid level meter (16).

6. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: The oil tank (1) is provided with a ventilation device (17).

7. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: The filtering device comprises a coarse-precision filter (18), a medium-precision filter (19) and a high-precision filter (20) which are sequentially arranged on a filtering pipe (5).

8. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: A flow meter (21) is provided on the return pipe (10), and a check valve (22) is provided between the flow meter (21) and the oil tank (1).

9. The high-viscosity oil multi-stage filtering and heating device according to claim 1, characterized in that: The working medium of the cooler (9) is water. The cooler (9) is provided with a water inlet pipe (23) and a water outlet pipe (24). The water outlet pipe (24) is provided with an electromagnetic water valve (25).

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