Oil liquid cleanliness control device for die casting machine

Abstract

The utility model discloses a die-casting machine oil cleanliness control device, which belongs to the technical field of hydraulic oil filtration and comprises an oil tank, the oil tank is connected with a circulating filtration cooling oil way, and an independent circulating cooling pump set, a cooler and an independent circulating filter are sequentially arranged on the circulating filtration cooling oil way. The oil tank is connected with an oil outlet path which is sequentially connected with an oil suction filter, a suction assembly and a high-pressure filter. The utility model aims to provide the oil liquid cleanliness control device for the die-casting machine, which can realize the stable operation of the proportional valve and the servo valve and protect the filter.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oil filtration, and in particular relates to an oil cleanliness control device for a die-casting machine. Background Art

[0002] At present, the die-casting machine mainly adopts hydraulic drive. With the continuous development of die-casting machine technology, the cleanliness of hydraulic oil has become very important in conjunction with high-precision control systems. It is not only necessary to prevent moisture in the air from entering the oil tank, but also to face the harsh environment of the die-casting machine workshop, such as pollution from the mold and external sources when replacing the core puller; in addition, hydraulic oil is more prone to oxidation reaction in a high-temperature environment. In summary, the cleanliness of the oil has a serious impact on the performance and production of the die-casting machine, and the control of the cleanliness of the oil also indirectly reflects the performance of the die-casting machine.

[0003] At present, the hydraulic system of the die-casting machine often adopts the optimized oil tank structure and the filtering method combining the oil suction filter and the oil return filter. Although it can filter larger pollutant particles, the filtering accuracy is low for the proportional valve and servo valve, and the stability of the system cannot be guaranteed, which will cause valve sticking and cylinder wear problems.

[0004] The prior art includes an invention patent named hydraulic oil filtering device, the publication number of which is KR19920011551A. The device of this invention is used to recycle waste oil in hydraulic machinery or construction machinery, and can completely filter dirty oil containing fine metal powder or pollutants or moisture. The device includes a primary / secondary filtering device for filtering waste oil through primary / secondary steps, having a pump device driven by a drive motor; a heating device for heating the oil supplied from the oil tank through a hose; respective filters; and a storage device for storing filtered oil and separating moisture from the oil. This invention can be extended to the field of die-casting machine oil cleanliness control, but the filtering accuracy of this invention is low and cannot guarantee the cleanliness of the hydraulic oil. Summary of the invention

[0005] The utility model aims to provide a die-casting machine oil cleanliness control device which can realize the stable operation of a proportional valve and a servo valve and protect a filter.

[0006] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0007] The die-casting machine oil cleanliness control device comprises an oil tank, the oil tank is connected with a circulating filter cooling oil circuit, and the circulating filter cooling oil circuit is provided with an independent circulating cooling pump group, a cooler and an independent circulating filter in sequence;

[0008] The oil tank is connected with an oil outlet, which is provided with an oil suction filter, a suction assembly and a high-pressure filter in sequence.

[0009] Through the overall design of the die-casting machine oil cleanliness control device, the hydraulic oil in the oil tank passes through the cooler through the independent circulation cooling pump group to ensure that the oil temperature is maintained at 50-60°C, and then returns to the oil tank through the independent circulation filter to ensure the cleanliness of the hydraulic oil in the oil tank. The layout of the independent circulation filter cooling oil circuit can not only continuously filter the hydraulic oil in the oil tank, but also ensure that the temperature of the hydraulic oil is maintained within the optimal temperature range of the hydraulic system, ensuring the safety and reliability of the system, and can also avoid the oxidation of the hydraulic oil due to the increase in temperature, and extend the replacement time of the hydraulic oil.

[0010] Driven by the suction assembly, the hydraulic oil in the oil tank passes through the suction filter, and then the hydraulic oil passes through the high-pressure filter into the main oil circuit, ensuring the stable operation of the proportional valve and servo valve pilot. Through the setting of the suction filter, its filtration accuracy meets the oil cleanliness requirements of ordinary reversing valves and cartridge valves, and can avoid the influence of oil on the hydraulic pump; in addition, the setting of the high-pressure filter can meet the oil cleanliness requirements of the proportional reversing valve; and, for the servo valves of the injection valve plate, the booster valve plate and the quick exhaust valve plate, the one-way valve and the high-pressure filter are used to ensure the cleanliness requirements of the pilot valve oil of the servo valve.

[0011] It should be noted that the oil suction filter is connected in parallel with an alarm device, which is used to sound an alarm when the oil suction filter is clogged to a certain extent, reminding the user to replace the oil suction filter.

[0012] According to an embodiment of the utility model, the oil tank is connected to the movable mold core puller through a movable mold core puller circuit, and the oil tank is connected to the fixed mold core puller through a fixed mold core puller circuit;

[0013] A movable mold core-pulling oil return filter is provided on the movable mold core-pulling circuit, and a fixed mold core-pulling oil return filter is provided on the fixed mold core-pulling circuit.

[0014] It should be noted that the movable mold core pulling circuit is connected to the movable mold core pulling valve plate, and the fixed mold core pulling circuit is connected to the fixed mold core pulling valve plate. Through the above design, the hydraulic oil of the fixed mold core pulling returns to the oil tank through the fixed mold core pulling oil return filter, and the hydraulic oil of the movable mold core pulling returns to the oil tank through the movable mold core pulling oil return filter. Since the movable mold core pulling circuit and the fixed mold core pulling circuit are most affected by the external environment, the setting of the movable mold core pulling oil return filter and the fixed mold core pulling oil return filter can facilitate customers to replace the filter element on the one hand, and on the other hand, the fixed mold core pulling oil return filter and the movable mold core pulling oil return filter can avoid the pollution of the oil tank by external environmental factors when replacing the core pulling, so as to ensure the cleanliness of the hydraulic oil in the oil tank.

[0015] According to an embodiment of the utility model, the suction assembly includes a servo motor and a double pump. The double pump divides the oil outlet path away from the oil suction filter into a first oil outlet path and a second oil outlet path. High-pressure filters are provided on the first oil outlet path and the second oil outlet path.

[0016] Through the above design, the oil outlet is provided with an oil suction filter and a suction assembly in sequence, and the servo motor drives the operation of the double pump, so that the double pump divides the subsequent oil outlet into the first oil outlet and the second oil outlet, and the first oil outlet and the second oil outlet are both provided with a high-pressure filter. At this time, the hydraulic oil in the oil tank is driven by the servo motor and passes through the oil suction filter, and the oil suction filter ensures the cleanliness of the hydraulic oil passing through the double pump, and then the hydraulic oil enters the main oil circuit through the high-pressure filters on the first oil outlet and the second oil outlet, respectively, to ensure the stable operation of the proportional valve and the servo valve pilot.

[0017] It should be noted that the high-pressure filter includes a high-pressure filter element, a bypass valve and an alarm device arranged in parallel. The alarm device is used to sound an alarm when the high-pressure filter element is blocked to a certain extent, reminding the user to replace the high-pressure filter element.

[0018] According to an embodiment of the utility model, an air filter is provided in the fuel tank.

[0019] An air filter is provided in the oil tank, and the air filter is used to absorb the moisture in the air in the oil tank, thereby reducing the moisture in the air in the oil tank and preventing the moisture in the air in the oil tank from polluting the cleanliness of the hydraulic oil in the oil tank.

[0020] According to an embodiment of the utility model, a detection window is provided on the air filter.

[0021] Through the above design, a detection window is provided on the air filter. It should be noted that the detection window on the air filter is used to observe the situation inside the air filter so that the customer can replace the air filter. A die-casting machine, the die-casting machine uses a die-casting machine oil cleanliness control device.

[0022] The die-casting machine using the die-casting machine oil cleanliness control device can prevent oil pollution, realize filter protection, realize the cooler to extend the oxidation time of the hydraulic oil and realize the stable operation of the proportional valve and the servo valve through the high-pressure filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of the casting machine oil cleanliness control device.

[0024] Figure numbers: oil tank 1, movable mold core pulling circuit 11, fixed mold core pulling circuit 12, movable mold core pulling 13, fixed mold core pulling 14, movable mold core pulling oil return filter 15, fixed mold core pulling oil return filter 16, air filter 17, circulating filtration cooling oil circuit 2, independent circulating cooling pump group 21, cooler 22, independent circulating filter 23, oil outlet circuit 3, oil suction filter 31, servo motor 32, high pressure filter 33, duplex pump 34, first oil outlet circuit 35, second oil outlet circuit 36. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods and drawings:

[0026] Embodiment 1:

[0027] like Figure 1 As shown, the die-casting machine oil cleanliness control device comprises an oil tank 1, the oil tank 1 is connected to a circulating filter cooling oil circuit 2, and the circulating filter cooling oil circuit 2 is provided with an independent circulating cooling pump group 21, a cooler 22 and an independent circulating filter 23 in sequence;

[0028] The oil tank 1 is connected to an oil outlet 3 , and the oil outlet 3 is provided with an oil suction filter 31 , a suction assembly and a high-pressure filter 33 in sequence.

[0029] Through the overall design of the die-casting machine oil cleanliness control device, the hydraulic oil in the oil tank 1 passes through the independent circulation cooling pump group 21 and the cooler 22 to ensure that the oil temperature is maintained at 50-60°C, and then passes through the independent circulation filter 23 to return to the oil tank 1 to ensure the cleanliness of the hydraulic oil in the oil tank 1. Through the layout of the independent circulation filter cooling oil circuit 2, not only can the hydraulic oil in the oil tank 1 be continuously filtered, but also the temperature of the hydraulic oil can be maintained within the optimal temperature range of the hydraulic system, ensuring the safety and reliability of the system, and can also avoid the oxidation of the hydraulic oil due to the increase in temperature, and extend the replacement time of the hydraulic oil.

[0030] Driven by the suction assembly, the hydraulic oil in the oil tank 1 passes through the oil suction filter 31, and then the hydraulic oil passes through the high-pressure filter 33 to enter the main oil circuit, ensuring the stable operation of the proportional valve and the servo valve pilot. Through the setting of the oil suction filter 31, its filtering accuracy meets the oil cleanliness requirements of ordinary reversing valves and cartridge valves, and can avoid the influence of oil on the hydraulic pump; in addition, the setting of the high-pressure filter 33 can meet the oil cleanliness requirements of the proportional reversing valve; and, for the servo valves of the injection valve plate, the booster valve plate and the quick exhaust valve plate, the one-way valve and the high-pressure filter 33 are used to ensure the cleanliness requirements of the pilot valve oil of the servo valve.

[0031] It should be noted that the oil suction filter 31 is connected in parallel with an alarm device, which is used to sound an alarm when the oil suction filter 31 is clogged to a certain extent, so as to remind the user to replace the oil suction filter 31 .

[0032] Furthermore, the oil suction filter 31 is a self-sealing oil suction filter.

[0033] The oil tank 1 is connected to the movable mold core pulling 13 through the movable mold core pulling circuit 11, and the oil tank 1 is connected to the fixed mold core pulling 14 through the fixed mold core pulling circuit 12;

[0034] A movable mold core-pulling oil return filter 15 is provided on the movable mold core-pulling circuit 11 , and a fixed mold core-pulling oil return filter 16 is provided on the fixed mold core-pulling circuit 12 .

[0035] It should be noted that the movable mold core pulling circuit 11 is connected to the valve plate of the movable mold core pulling 13, and the fixed mold core pulling circuit 12 is connected to the valve plate of the fixed mold core pulling 14. Through the above design, the hydraulic oil of the fixed mold core pulling 14 returns to the oil tank 1 through the fixed mold core pulling oil return filter 16, and the hydraulic oil of the movable mold core pulling 13 returns to the oil tank 1 through the movable mold core pulling oil return filter 15. Since the movable mold core pulling circuit 11 and the fixed mold core pulling circuit 12 are most affected by the external environment, the setting of the movable mold core pulling oil return filter 15 and the fixed mold core pulling oil return filter 16 can facilitate customers to replace the filter element on the one hand, and on the other hand, the fixed mold core pulling oil return filter 16 and the movable mold core pulling oil return filter 15 can avoid the pollution of the oil tank 1 by external environmental factors when replacing the core pulling, so as to ensure the cleanliness of the hydraulic oil in the oil tank 1.

[0036] The suction assembly includes a servo motor 32 and a double pump 34 . The double pump 34 divides the oil outlet 3 away from the oil suction filter 31 into a first oil outlet 35 and a second oil outlet 36 . The first oil outlet 35 and the second oil outlet 36 are both provided with a high-pressure filter 33 .

[0037] Through the above design, the oil outlet 3 is provided with an oil suction filter 31 and a suction assembly in sequence, the servo motor 32 drives the double pump 34 to operate, and the double pump 34 divides the subsequent oil outlet 3 into a first oil outlet 35 and a second oil outlet 36, and a high-pressure filter 33 is provided on the first oil outlet 35 and the second oil outlet 36. At this time, the hydraulic oil in the oil tank 1 is driven by the servo motor 32 and passes through the oil suction filter 31, and the oil suction filter 31 ensures the cleanliness of the hydraulic oil passing through the double pump 34, and then the hydraulic oil enters the main oil circuit through the high-pressure filters 33 on the first oil outlet 35 and the second oil outlet 36, respectively, to ensure the stable operation of the proportional valve and the servo valve pilot.

[0038] It should be noted that the high-pressure filter 33 includes a high-pressure filter element, a bypass valve and an alarm device arranged in parallel. The alarm device is used to sound an alarm when the high-pressure filter element is blocked to a certain extent, reminding the user to replace the high-pressure filter element.

[0039] An air filter 17 is arranged in the fuel tank 1 .

[0040] An air filter 17 is provided in the oil tank 1 , and the air filter 17 is used to absorb moisture in the air in the oil tank 1 , thereby reducing the moisture in the air in the oil tank 1 and preventing the moisture in the air in the oil tank 1 from polluting the cleanliness of the hydraulic oil in the oil tank 1 .

[0041] Furthermore, an air filter 17 is arranged on the top of the fuel tank 1 .

[0042] The air filter 17 is provided with a detection window.

[0043] Through the above design, a detection window is provided on the air filter 17. It should be noted that the detection window on the air filter 17 is used to observe the situation inside the air filter 17, so that the customer can replace the air filter 17. Furthermore, the color inside the detection window can become darker as the moisture inside the air filter 17 increases. Furthermore, when the air filter 17 needs to be replaced, the detection window can send a striking signal or send an electrical signal to the central control machine.

[0044] Embodiment 2:

[0045] A die-casting machine, the die-casting machine using a die-casting machine oil cleanliness control device.

[0046] The die-casting machine using the die-casting machine oil cleanliness control device can prevent oil pollution, realize filter protection, realize the cooler 22 to extend the oxidation time of the hydraulic oil, and realize the stable operation of the proportional valve and the servo valve through the high-pressure filter 33.

[0047] The embodiments described above provide a detailed description of the technical solution of the utility model. It should be understood that the above is only a specific embodiment of the utility model and is not intended to limit the utility model. Any modifications, supplements or similar substitutions made within the scope of the principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A die-casting machine oil cleanliness control device, comprising an oil tank (1), characterized in that: The oil tank (1) is connected to a circulating filtering cooling oil circuit (2), and the circulating filtering cooling oil circuit (2) is provided with an independent circulating cooling pump group (21), a cooler (22) and an independent circulating filter (23) in sequence; The oil tank (1) is connected to an oil outlet passage (3), and the oil outlet passage (3) is provided with an oil suction filter (31), a suction assembly and a high-pressure filter (33) in sequence.

2. The die-casting machine oil cleanliness control device according to claim 1, characterized in that: The oil tank (1) is connected to the movable mold core puller (13) via a movable mold core puller circuit (11), and the oil tank (1) is connected to the fixed mold core puller (14) via a fixed mold core puller circuit (12); The movable mold core-pulling circuit (11) is provided with a movable mold core-pulling oil return filter (15), and the fixed mold core-pulling circuit (12) is provided with a fixed mold core-pulling oil return filter (16).

3. The die-casting machine oil cleanliness control device according to claim 1, characterized in that: The suction assembly comprises a servo motor (32) and a double pump (34), wherein the double pump (34) divides the oil outlet path (3) away from the oil suction filter (31) into a first oil outlet path (35) and a second oil outlet path (36), wherein the first oil outlet path (35) and the second oil outlet path (36) are both provided with a high-pressure filter (33).

4. The die-casting machine oil cleanliness control device according to claim 1, characterized in that: An air filter (17) is provided in the oil tank (1).

5. The die-casting machine oil cleanliness control device according to claim 4, characterized in that: The air filter (17) is provided with a detection window.

6. A die casting machine, characterized in that: The die-casting machine applies the die-casting machine oil cleanliness control device as described in any one of claims 1-5.

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