Oil filtering system for improving precision of particulate matters in hydraulic oil

Abstract

The utility model relates to an oil filtering system for improving the precision of particulate matters in hydraulic oil, which comprises a hydraulic pump, a safety valve, a pressure gauge, a first ball valve, a second ball valve, a tubular one-way valve, a filter and an oil tank, one path is connected with the first ball valve and the tubular one-way valve and then connected into a system oil tank, and the other path is connected with the second ball valve and the filter and finally connected with the oil tank. According to the utility model, the particle precision grade of the hydraulic oil is ensured, the equipment failure of the hydraulic system is reduced, and the stability and the working precision of the hydraulic system are improved, so that the hydraulic oil reaches the NAS6-7 grade standard and can directly enter the top of a blast furnace or a TRT hydraulic system.

Description

Technical Field

[0001] The utility model relates to a filtering system, in particular to an oil filtering system for improving the precision of hydraulic oil particles. Background Art

[0002] The most common hydraulic oil pollution is hydraulic oil particle pollution, which is mainly reflected in the size and number of particles in the oil. The industry generally uses IOS4406 or NAS1638 standards as the classification method. For different working environments and different work needs, the requirements for the particle contamination of the oil in the hydraulic system are also different. For example, in the working environment of blast furnace top, TRT control, etc., since the system contains high-precision valves such as proportional valves and servo valves, the particle contamination accuracy of the hydraulic oil in the system is required to reach NAS6-7 or above, and the particle contamination accuracy of the hydraulic oil in the hot blast furnace valve control hydraulic system is required to reach NAS8-9 or above.

[0003] Therefore, it is necessary to ensure that when the hydraulic oil is newly added to the system, it meets the system's accuracy level for hydraulic oil particle contamination to ensure the overall smooth operation of the system. More than 75% of hydraulic system failures and more than 50% of mechanical equipment failures are related to the contamination of hydraulic oil in the system. Therefore, good oil contamination control in the hydraulic system is of great significance to reducing the contamination of hydraulic oil, thereby reducing hydraulic system equipment failures and improving the stability and working accuracy of the hydraulic system.

[0004] However, the particle contamination accuracy of the newly purchased hydraulic oil is difficult to meet the system design requirements before it is added to the system. Judging from the results of the company's newly purchased hydraulic oil sampling and testing, it can generally only meet the NAS9-10 level standards and cannot be used directly. It is extremely important to improve the particle contamination accuracy through the filtration system to meet the system requirements. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide an oil filtration system for improving the particle accuracy of hydraulic oil.

[0006] Technical solution: The utility model device includes a hydraulic pump, a safety valve, a pressure gauge, a first ball valve, a second ball valve, a tubular non-return valve, a filter and an oil tank. A safety valve and a pressure gauge are respectively arranged on the left and right sides of the upper side of the hydraulic pump. The filtering system is divided into two paths after the hydraulic pump. One path is connected to the first ball valve and the tubular non-return valve, and then connected to the system oil tank. The other path is connected to the second ball valve and the filter, and finally connected to the oil tank.

[0007] Furthermore, a refueling hole is provided on the top of the oil tank.

[0008] Furthermore, the first ball valve is closed, the second ball valve is opened, and the oil pump is operated to pump out the hydraulic oil in the oil tank.

[0009] Furthermore, a return pipe is installed between the filter and the oil tank.

[0010] Furthermore, the hydraulic pump selects a screw pump with suitable flow and pressure according to actual needs.

[0011] Furthermore, the first ball valve of the hydraulic pump is opened, the second ball valve is closed, and the hydraulic oil is connected to the system oil tank through the tubular one-way valve.

[0012] Furthermore, the hydraulic pump, the second ball valve, the filter and the oil tank form a circulation loop.

[0013] Beneficial effects: Compared with the prior art, the utility model has the following significant advantages: it ensures the particle accuracy level of the hydraulic oil, reduces the failure of hydraulic system equipment, and improves the stability and working accuracy of the hydraulic system; the hydraulic oil reaches the NAS6-7 level standard and can directly enter the blast furnace top or TRT hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, the utility model device includes a hydraulic pump 1, a safety valve 2, a pressure gauge 3, a first ball valve 4, a second ball valve 5, a tubular check valve 6, a filter 7 and an oil tank 8. The safety valve 2 and the pressure gauge 3 are respectively arranged on the left and right sides of the upper side of the hydraulic pump 1. The filtering system is divided into two paths after the hydraulic pump 1. One path is connected to the first ball valve 4 and the tubular check valve 6, and then connected to the system oil tank, and the other path is connected to the second ball valve 5 and the filter 7, and finally connected to the oil tank 8. A refueling hole is arranged on the top of the oil tank 8, and a return pipe is installed between the filter 7 and the oil tank 8. The hydraulic pump 1 selects a screw pump with a suitable flow rate and pressure according to actual needs.

[0017] The hydraulic oil enters the oil tank 8 through the filling hole on the top of the oil tank 8, closes the first ball valve 4, opens the second ball valve 5, and the oil pump runs to extract the hydraulic oil in the oil tank 8. The hydraulic pump 1 selects a screw pump with a suitable flow rate and pressure according to actual needs. The hydraulic oil is sent to the filter 7 through the pipeline for filtration. The filtered hydraulic oil flows back to the oil tank 8 through the reflux pipe, and then is pumped out by the oil pump again for filtration, and the cycle is repeated.

[0018] The utility model is composed of an oil tank, a power system, a control pipeline and auxiliary facilities. The oil tank is mainly used to store the oil that needs to be filtered. In this step, a refueling cart can be used to put the hydraulic oil in the oil barrel into the filter oil tank through the refueling hole on the top of the oil tank. When the oil pump is running, the oil in the oil tank is pumped out and sent to the filter through the pipeline for filtration. The filtered oil then flows back to the oil tank through the reflux pipe and is pumped out again by the oil pump for filtration. This cycle is repeated. By regularly replacing the filter cartridge of a higher level filter, the oil is gradually filtered until the accuracy of the oil particles reaches the level required by the system.

[0019] After the particle accuracy of the oil meets the standard, the circulating filter oil circuit is converted into an oil drain circuit by opening and closing the valve on the pipeline. After the circuit is changed, the oil pump extracts the filtered oil from the oil tank and sends it to the production hydraulic system tank that needs to be filled with new oil through the pipeline for use.

[0020] According to the actual working conditions, a 0.6-1m3 stainless steel oil tank is selected, and the components and electric control box required for the system are arranged on the upper part of the oil tank. Auxiliary components such as liquid level gauge and temperature control device are also configured. Rollers are added to the lower part of the oil tank to facilitate the movement and use of this device.

[0021] Before the oil enters the system, use a refueling trolley to put the hydraulic oil in the oil barrel into the filter tank through the refueling hole on the top of the tank. At this time, close ball valve 1 and open ball valve 2. When the oil pump is running, the oil in the tank is pumped out. The hydraulic pump can select a screw pump with appropriate flow and pressure according to actual needs. The operation stability is high. The oil is sent to the filter through the pipeline for filtration to achieve the purpose of improving the accuracy level of oil particles. The filtered oil then flows back to the tank through the return pipe and is pumped out by the oil pump again for filtration, and the cycle repeats. If there is enough space, the filter can use a double-barrel filter commonly seen in hydraulic systems, which is convenient for replacing the filter element during operation. The filter element accuracy can also be improved at any time according to needs. By regularly replacing the filter cartridge of a higher-level filter, the oil is gradually filtered until the oil particle accuracy reaches the level required by the system.

[0022] After the particle accuracy of the oil reaches the standard, close ball valve 2, open ball valve 1, and the oil circuit is switched. After the switch, the oil pump extracts the filtered oil from the oil tank and sends it to the system oil tank that needs to be filled with new oil through the pipeline for use.

[0023] After about 12-16 hours of simple filtration through this device, it can reach the NAS7 level standard. This level of hydraulic oil can directly enter the blast furnace top or the oil tank of the TRT hydraulic system for use.

Claims

1. An oil filtration system for improving the accuracy of hydraulic oil particles, characterized by: The invention comprises a hydraulic pump (1), a safety valve (2), a pressure gauge (3), a first ball valve (4), a second ball valve (5), a tubular check valve (6), a filter (7) and an oil tank (8). The safety valve (2) and the pressure gauge (3) are respectively arranged on the left and right sides of the upper side of the hydraulic pump (1). The filtering system is divided into two paths after the hydraulic pump (1). One path is connected to the first ball valve (4) and the tubular check valve (6) and then connected to the system oil tank. The other path is connected to the second ball valve (5) and the filter (7) and finally connected to the oil tank (8).

2. The oil filtration system for improving the particle accuracy of hydraulic oil according to claim 1 is characterized in that: The top of the oil tank (8) is provided with a refueling hole.

3. The oil filtration system for improving the particle accuracy of hydraulic oil according to claim 1 is characterized in that: The first ball valve (4) is closed, the second ball valve (5) is opened, and the oil pump operates to pump out the hydraulic oil in the oil tank (8).

4. The oil filtration system for improving the particle accuracy of hydraulic oil according to claim 1, characterized in that: A return pipe is installed between the filter (7) and the oil tank (8).

5. The oil filtration system for improving the particle accuracy of hydraulic oil according to claim 1, characterized in that: The hydraulic pump (1) is a screw pump with a suitable flow rate and pressure according to actual needs.

6. The oil filtration system for improving the particle accuracy of hydraulic oil according to claim 1, characterized in that: The first ball valve (4) of the hydraulic pump (1) is opened, the second ball valve (5) is closed, and the hydraulic oil is connected to the system oil tank through the tubular one-way valve (6).

7. The oil filtration system for improving the particle accuracy of hydraulic oil according to claim 1, characterized in that: The hydraulic pump (1), the second ball valve (5), the filter (7) and the oil tank (8) form a circulation loop.

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