Oil filter for hydraulic oil circulation

Abstract

The utility model discloses an oil filter for hydraulic oil circulation, and relates to the technical field of hydraulic systems. The device comprises a filter shell, a sealing cover and a ventilation cleaning frame, a filter element is clamped and fixed to the center in the filter shell, the sealing cover is clamped and fixed to the top of the filter shell, a liquid pump penetrates and is clamped to the center of the top of the sealing cover, an oil pumping pipe penetrates and is clamped to one end of the peripheral face of the liquid pump, and a semiconductor refrigeration assembly and a heating pipe are clamped and fixed to the peripheral face of the oil pumping pipe; a ventilation cleaning frame sleeves the peripheral surface of the filter element, a ventilation pipe and a lifting cylinder are arranged at the top of the ventilation cleaning frame, and an air pump penetrates through and is clamped to the top of the peripheral surface of the ventilation pipe. By arranging the filter shell, the sealing cover and the ventilation cleaning frame, the problems that the filter screen is abraded due to long-time friction between the scraper blade and the filter screen, a large amount of impurities in hydraulic oil can be separated out within different temperature ranges, and the filtering effect on the hydraulic oil within a fixed temperature range is poor are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic systems, and particularly relates to an oil filter for hydraulic oil circulation. Background Art

[0002] Hydraulic oil is a hydraulic medium used in hydraulic systems that utilize liquid pressure energy. It plays the role of energy transmission, anti-wear, system lubrication, anti-corrosion, anti-rust, cooling, etc. in hydraulic systems. For hydraulic oil, first of all, it should meet the requirements of hydraulic device for liquid viscosity at working temperature and starting temperature. Since the viscosity change of lubricating oil is directly related to hydraulic action, transmission efficiency and transmission accuracy, it is also required that the viscosity-temperature performance and shear stability of the oil should meet the various requirements put forward by different uses. When maintaining hydraulic oil, it is necessary to use an oil filter to filter the hydraulic oil to filter out the particulate impurities in the hydraulic oil to ensure the normal operation of the hydraulic system. However, it still has the following disadvantages in actual use:

[0003] 1. The utility model with publication number CN208990352U discloses a self-cleaning mesh oil filter, wherein a top cover is provided on the oil filter housing, the top cover is sealed and connected to the oil filter housing, an oil inlet is provided on the top of the housing, an oil outlet is provided on the bottom, the filter is placed inside the oil filter housing, pressure sensors are provided on the inner and outer sides of the filter, and the oil filter usually scrapes impurities from the inner layer of the filter through a scraper to avoid blockage of the filter resulting in a decrease in the filtration efficiency of the hydraulic oil, but the friction between the scraper and the filter may cause wear of the filter, resulting in the need to replace the filter regularly to ensure the filtration effect, increasing maintenance expenses;

[0004] 2. When the oil filter filters the hydraulic oil, the hydraulic oil is often in a certain temperature range, but the impurities in the hydraulic oil may precipitate after the hydraulic oil is cooled, or precipitate after the hydraulic oil rises to a certain temperature. Filtering the hydraulic oil within a fixed temperature range has poor filtering efficiency. Utility Model Content

[0005] The utility model aims to provide an oil filter for hydraulic oil circulation, which solves the problems that the filter screen is cleaned by the friction between the scraper and the filter screen during use, and the filter screen may be worn for a long time, and impurities in the hydraulic oil may be precipitated in large quantities within different temperature ranges, resulting in poor filtering effect of the hydraulic oil within a fixed temperature range.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is an oil filter for hydraulic oil circulation, comprising a filter housing, a sealing cover and a ventilation cleaning frame, a filter element is fixedly connected in the center of the filter housing, a sealing cover is fixedly connected in the top of the filter housing, a liquid pump is connected through the center of the top of the sealing cover, an oil extraction pipe is connected through one end of the outer peripheral surface of the liquid pump, a semiconductor refrigeration component and a heating pipe are fixedly connected to the outer peripheral surface of the oil extraction pipe, a ventilation cleaning frame is sleeved on the outer peripheral surface of the filter element, a ventilation pipe and a lifting cylinder are arranged on the top of the ventilation cleaning frame, and an air pump is connected through the top of the outer peripheral surface of the ventilation pipe;

[0008] When the liquid pump draws the hydraulic oil into the oil extraction pipe, the hydraulic oil can be heated by the heating pipe, and the hydraulic oil can be cooled by the semiconductor refrigeration component, so that the hydraulic oil can be filtered when it is in different temperature ranges, ensuring that all solid particles in the hydraulic oil that can melt within different temperature ranges are precipitated, ensuring the filtering efficiency, and the hydraulic oil can be filtered by the filter element. After the hydraulic oil is filtered, the ventilation cleaning frame is driven up and down by the lifting cylinder, and the gas is pumped into the ventilation pipe through the air pump, and further pumped into the ventilation cleaning frame. The filter element is backwashed by the airflow to blow out the particles blocked in the filter element, thereby avoiding the friction between the scraper and the filter element, which causes the filter element to be easily worn and reduces maintenance expenses.

[0009] Furthermore, a support frame is clamped and fixed around the bottom of the filter housing, a slag discharge pipe is welded through the center of the bottom of the filter housing, and an oil outlet pipe is welded through the bottom of the outer peripheral surface of the filter housing;

[0010] The hydraulic oil can be filtered through the filter element so that the solid particles in the hydraulic oil are retained in the filter element. When the oil filter has finished filtering the hydraulic oil or the temperature of the hydraulic oil needs to be adjusted, opening the discharge pipe can allow the solid particles in the filter element to be discharged through the discharge pipe under the action of gravity.

[0011] Furthermore, a support tube is clamped and fixed on the top of the filter element, the support tube is attached to the bottom of the sealing cover, and the slag discharge tube is located at the bottom of the filter element;

[0012] When the ventilation cleaning frame is not needed, the ventilation cleaning frame can be protected by the support pipe to prevent hydraulic oil from entering the ventilation cleaning frame, thereby ensuring the normal use of the oil filter.

[0013] Furthermore, a temperature monitoring component is inserted through the outer peripheral surface of the oil extraction pipe, and the temperature monitoring component is located at one end of the liquid pump of the oil extraction pipe. A heat preservation pad is attached to the outer peripheral surface of the heating pipe.

[0014] The hydraulic oil can be pumped into the oil extraction pipe through the liquid pump, and the temperature of the hydraulic oil can be monitored through the temperature monitoring component. When the temperature of the hydraulic oil needs to be adjusted, the heating pipe can heat the hydraulic oil, and the hydraulic oil can be cooled through the semiconductor refrigeration component. The hydraulic oil can be filtered when it is in different temperature ranges to ensure that all solid particles in the hydraulic oil that can melt within different temperature ranges are precipitated, thereby ensuring the filtration efficiency.

[0015] Furthermore, a lifting telescopic tube is slidably connected to the bottom of the lifting cylinder, the bottom of the lifting telescopic tube is connected to the top of the ventilation cleaning frame, the lifting cylinder is connected to the top of the sealing cover, and the lifting telescopic tube penetrates and is plugged into the top of the sealing cover;

[0016] The lifting cylinder can drive the lifting telescopic tube to extend and retract, and further drive the ventilation cleaning frame to move up and down, so as to clean different positions of the filter element, thereby improving the automation degree of the oil filter. The inner wall of the ventilation cleaning frame can be made of flexible sealing material to ensure that the ventilation cleaning frame will not cause wear to the surface of the filter element when sliding up and down, thereby reducing maintenance expenses.

[0017] Furthermore, a ventilation expansion pipe is slidably connected at the bottom of the ventilation pipe, the bottom of the ventilation expansion pipe penetrates and is connected to the top of the ventilation cleaning frame, an exhaust pipe is penetrated and connected to the top of the air pump, an air filter is clamped on the top of the exhaust pipe, a porous plate is welded and fixed inside the ventilation cleaning frame, an air outlet is penetrated and opened on the inner wall of the ventilation cleaning frame, the porous plate is located at the top of the air outlet, the ventilation pipe is clamped and fixed to the top of the sealing cover, and the ventilation expansion pipe penetrates and is plugged into the top of the sealing cover;

[0018] When cleaning the filter element, the air pump draws air into the ventilation pipe through the suction pipe. The air can be filtered through the air filter element to prevent dust in the environment from entering the oil filter. After entering the ventilation cleaning rack, the air is diverted through the porous plate to make the air pass evenly through various positions of the air outlet, and the filter element is backwashed by the airflow to discharge the particles blocked in the filter element.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model solves the problem that the oil filter usually scrapes the impurities in the inner layer of the filter screen by setting a filter housing and a ventilation cleaning frame to avoid clogging of the filter screen and resulting in a decrease in the filtration efficiency of the hydraulic oil, but the continuous friction between the scraper and the filter screen may cause wear of the filter screen, resulting in the need to regularly replace the filter screen to ensure the filtering effect, thereby increasing maintenance costs. When cleaning the filter element, the air pump draws air into the ventilation pipe, and the air passes through various positions of the air outlet evenly, and the filter element is backwashed by the airflow to discharge the particles blocked in the filter element, thereby avoiding the use of a scraper and friction between the filter element, which causes easy wear of the filter element and reduces maintenance costs.

[0021] 2. The utility model solves the problem that when the oil filter filters the hydraulic oil, the hydraulic oil is often in a certain temperature range, but the impurities in the hydraulic oil may precipitate after the hydraulic oil is cooled, or precipitate after the hydraulic oil rises to a certain temperature, and the filtration efficiency is poor when the hydraulic oil is filtered within a fixed temperature range by arranging a filter housing and a sealing cover. When the liquid pump draws the hydraulic oil into the oil extraction pipe, the hydraulic oil can be heated by the heating pipe, and the hydraulic oil can be cooled by the semiconductor refrigeration component, so that the hydraulic oil is filtered when it is in different temperature ranges, ensuring that all solid particles in the hydraulic oil that can melt within different temperature ranges are precipitated, thereby ensuring the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural effect diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model;

[0024] Figure 3 This is a structural diagram of the filter housing of the utility model;

[0025] Figure 4 It is a cross-sectional view of the filter housing of the utility model;

[0026] Figure 5 This is a structural diagram of the sealing cover of the utility model;

[0027] Figure 6 It is a cross-sectional view of the ventilation cleaning rack of the utility model.

[0028] Reference numerals:

[0029] 1. Filter housing; 101. Filter element; 102. Oil outlet pipe; 103. Support frame; 104. Support pipe; 105. Slag discharge pipe; 2. Sealing cover; 201. Liquid pump; 202. Oil extraction pipe; 203. Temperature monitoring component; 204. Semiconductor refrigeration component; 205. Heating pipe; 206. Insulation pad; 3. Ventilation cleaning rack; 301. Lifting cylinder; 302. Ventilation pipe; 303. Lifting telescopic pipe; 304. Ventilation telescopic pipe; 305. Air pump; 306. Exhaust pipe; 307. Air filter; 308. Perforated plate; 309. Air outlet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] See also Figure 1-6As shown, the utility model is an oil filter for hydraulic oil circulation, comprising a filter housing 1, a sealing cover 2 and a ventilation cleaning frame 3, a filter element 101 is fixedly connected in the center of the filter housing 1, a sealing cover 2 is fixedly connected to the top of the filter housing 1, a liquid pump 201 is connected to the center of the top of the sealing cover 2, an oil extraction pipe 202 is connected to one end of the outer peripheral surface of the liquid pump 201, a semiconductor refrigeration component 204 and a heating pipe 205 are fixedly connected to the outer peripheral surface of the oil extraction pipe 202, a ventilation cleaning frame 3 is sleeved on the outer peripheral surface of the filter element 101, a ventilation pipe 302 and a lifting cylinder 301 are arranged on the top of the ventilation cleaning frame 3, and an air pump 305 is connected to the top of the outer peripheral surface of the ventilation pipe 302;

[0032] When filtering the hydraulic oil, the liquid pump 201 is started to pump the hydraulic oil into the oil extraction pipe 202, and the temperature of the hydraulic oil is monitored by the temperature monitoring component 203, and the heating pipe 205 and the semiconductor refrigeration component 204 are controlled to heat or cool the oil extraction pipe 202, and the temperature of the hydraulic oil is further adjusted to filter the hydraulic oil within different temperature ranges. After the hydraulic oil enters the filter housing 1, it is filtered by the filter element 101, so that the solid particles in the hydraulic oil are retained in the filter element 101. When the filtration temperature of the hydraulic oil needs to be adjusted, the oil extraction pipe 202 is closed. 02 and open the slag discharge pipe 105 to discharge the waste slag, then close the slag discharge pipe 105 and open the oil extraction pipe 202, adjust the temperature of the hydraulic oil for a second filtration, after the hydraulic oil filtration is completed, close the oil extraction pipe 202 and the oil outlet pipe 102, open the slag discharge pipe 105, control the lifting cylinder 301 to drive the ventilation cleaning rack 3 to move up and down, and control the air pump 305 to pump the gas into the ventilation pipe 302, and further pump it into the ventilation cleaning rack 3, and use the airflow to backwash the filter element 101, blow out the particles blocked in the filter element 101, and discharge it through the slag discharge pipe 105.

[0033] Among them Figure 1-4 As shown, a support frame 103 is clamped and fixed around the bottom of the filter housing 1, a slag discharge pipe 105 is welded through the center of the bottom of the filter housing 1, an oil outlet pipe 102 is welded through the bottom of the outer peripheral surface of the filter housing 1, a support pipe 104 is clamped and fixed on the top of the filter element 101, the support pipe 104 is attached to the bottom of the sealing cover 2, and the slag discharge pipe 105 is located at the bottom of the filter element 101;

[0034] After the hydraulic oil is pumped into the filter housing 1 through the liquid pump 201, the hydraulic oil is filtered through the filter element 101, so that the solid particles in the hydraulic oil are retained in the filter element 101. When the oil filter has finished filtering the hydraulic oil or the temperature of the hydraulic oil needs to be adjusted, the oil extraction pipe 202 is closed and the slag discharge pipe 105 is opened, so that the solid particles in the filter element 101 are discharged through the slag discharge pipe 105 under the action of gravity.

[0035] Among them Figure 1 , 2As shown in FIG. 5 , a temperature monitoring component 203 is inserted through the outer peripheral surface of the oil pumping pipe 202, and the temperature monitoring component 203 is located at one end of the liquid pump 201 of the oil pumping pipe 202. A heat preservation pad 206 is attached to the outer peripheral surface of the heating pipe 205;

[0036] The liquid pump 201 draws the hydraulic oil into the oil extraction pipe 202, and the temperature of the hydraulic oil is monitored by the temperature monitoring component 203. When the temperature of the hydraulic oil needs to be adjusted, the heating pipe 205 heats the hydraulic oil, or the hydraulic oil is cooled by the semiconductor refrigeration component 204, so that the hydraulic oil is filtered when it is in different temperature ranges.

[0037] Among them Figure 1 , 2 As shown in 6, the bottom of the lifting cylinder 301 is slidably connected with a lifting telescopic tube 303, and the bottom of the lifting telescopic tube 303 is connected to the top of the ventilation cleaning frame 3, the lifting cylinder 301 is connected to the top of the sealing cover 2, and the lifting telescopic tube 303 is inserted through the top of the sealing cover 2, the bottom of the ventilation pipe 302 is slidably connected with the ventilation telescopic tube 304, and the bottom of the ventilation telescopic tube 304 is inserted through the top of the ventilation cleaning frame 3, the top of the air pump 305 is inserted through the exhaust pipe 306, and the top of the exhaust pipe 306 is inserted with an air filter 307, the ventilation cleaning frame 3 is welded and fixed with a porous plate 308, the inner wall of the ventilation cleaning frame 3 is penetrated with an air outlet 309, and the porous plate 308 is located at the top of the air outlet 309, the ventilation pipe 302 is fixed to the top of the sealing cover 2, and the ventilation telescopic tube 304 is inserted through the top of the sealing cover 2;

[0038] When cleaning the filter element 101, the lifting cylinder 301 is controlled to drive the lifting telescopic tube 303 to extend and retract, further driving the ventilation cleaning frame 3 to move up and down, and at the same time can drive the ventilation telescopic tube 304 to extend and retract. The air pump 305 draws the outside air into the ventilation pipe 302 through the exhaust pipe 306, and draws the air into the ventilation cleaning frame 3 through the ventilation telescopic tube 304. The air is diverted through the porous plate 308 and blown to the surface of the filter element 101 through the air outlet 309, so as to backwash the filter element 101 and discharge the particles blocked in the filter element 101.

[0039] The specific working principle of the utility model is as follows: when filtering the hydraulic oil, the liquid pump 201 is started to pump the hydraulic oil into the oil extraction pipe 202, and the temperature of the hydraulic oil is monitored by the temperature monitoring component 203. When filtering is required in different temperature ranges, the heating pipe 205 is controlled to heat the hydraulic oil, or the hydraulic oil is cooled by the semiconductor refrigeration component 204 to keep the hydraulic oil within different temperature ranges. After the hydraulic oil enters the filter housing 1, it is filtered by the filter element 101 so that the solid particles in the hydraulic oil are retained in the filter element 101. When the filtration temperature of the hydraulic oil needs to be adjusted, the oil extraction pipe 202 is closed and the slag discharge pipe 105 is opened to discharge the waste slag, and then the slag discharge pipe 105 is closed. 5 and open the oil extraction pipe 202, adjust the temperature of the hydraulic oil for the second filtration, after the hydraulic oil filtration is completed, close the oil extraction pipe 202 and the oil outlet pipe 102, and open the slag discharge pipe 105, the waste slag is discharged through the slag discharge pipe 105 under the action of gravity, control the lifting cylinder 301 to drive the lifting telescopic pipe 303 to extend and retract, and further drive the ventilation cleaning rack 3 to move up and down, the air pump 305 draws the outside air into the ventilation pipe 302 through the suction pipe 306, and draws the air into the ventilation cleaning rack 3 through the ventilation telescopic pipe 304, the air is diverted through the porous plate 308, and blown to the surface of the filter element 101 through the air outlet 309, the filter element 101 is backwashed, and the particles blocked in the filter element 101 are discharged.

[0040] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An oil filter for hydraulic oil circulation, comprising a filter housing (1), a sealing cover (2) and a ventilation cleaning frame (3), characterized in that: A filter element (101) is fixedly fastened in the center of the filter housing (1), a sealing cover (2) is fixedly fastened in the top of the filter housing (1), a liquid pump (201) is fastened through the center of the top of the sealing cover (2), an oil extraction pipe (202) is fastened through one end of the outer peripheral surface of the liquid pump (201), a semiconductor refrigeration component (204) and a heating pipe (205) are fastened through the outer peripheral surface of the oil extraction pipe (202), a ventilation cleaning frame (3) is sleeved on the outer peripheral surface of the filter element (101), a ventilation pipe (302) and a lifting cylinder (301) are arranged on the top of the ventilation cleaning frame (3), and an air pump (305) is fastened through the top of the outer peripheral surface of the ventilation pipe (302).

2. The oil filter for hydraulic oil circulation according to claim 1, characterized in that: Support frames (103) are clamped and fixed around the bottom of the filter housing (1), a slag discharge pipe (105) is welded through the center of the bottom of the filter housing (1), and an oil outlet pipe (102) is welded through the bottom of the outer peripheral surface of the filter housing (1).

3. The oil filter for hydraulic oil circulation according to claim 2, characterized in that: A support tube (104) is clamped and fixed on the top of the filter element (101), the support tube (104) is attached to the bottom of the sealing cover (2), and the slag discharge tube (105) is located at the bottom of the filter element (101).

4. The oil filter for hydraulic oil circulation according to claim 3, characterized in that: A temperature monitoring component (203) is inserted through the outer circumference of the oil extraction pipe (202) and is clamped thereon. The temperature monitoring component (203) is located at one end of the liquid pump (201) of the oil extraction pipe (202). A heat preservation pad (206) is attached to the outer circumference of the heating pipe (205).

5. The oil filter for hydraulic oil circulation according to claim 1, characterized in that: The bottom of the lifting cylinder (301) is slidably clamped with a lifting telescopic tube (303), the bottom of the lifting telescopic tube (303) is clamped to the top of the ventilation and cleaning frame (3), the lifting cylinder (301) is clamped to the top of the sealing cover (2), and the lifting telescopic tube (303) penetrates and is inserted into the top of the sealing cover (2).

6. The oil filter for hydraulic oil circulation according to claim 1, characterized in that: The bottom of the ventilation pipe (302) is slidably connected to a ventilation telescopic pipe (304), the bottom of the ventilation telescopic pipe (304) penetrates and is connected to the top of the ventilation cleaning frame (3), the top of the air pump (305) penetrates and is connected to an exhaust pipe (306), the top of the exhaust pipe (306) is connected to an air filter (307), a porous plate (308) is welded and fixed inside the ventilation cleaning frame (3), an air outlet (309) is penetrated through the inner wall of the ventilation cleaning frame (3), the porous plate (308) is located at the top of the air outlet (309), the ventilation pipe (302) is clamped and fixed to the top of the sealing cover (2), and the ventilation telescopic pipe (304) penetrates and is plugged into the top of the sealing cover (2).

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