Hydraulic system with filtering loop and hydraulic equipment applying hydraulic system

Abstract

The hydraulic system with the filtering loop comprises an oil tank and an executing element, a hydraulic pipeline is arranged between the oil tank and the executing element, the oil tank and the executing element are communicated through the hydraulic pipeline, a power piece is installed on the hydraulic pipeline, a high-pressure filter is installed on the hydraulic pipeline, and the filtering loop is arranged on the high-pressure filter. A first one-way valve is installed on the side, away from the executing element, of the hydraulic filter and limits conveying of hydraulic oil in the direction of the executing element, a hydraulic branch pipe is connected and communicated to the hydraulic pipeline, and one end, on the side, away from the first one-way valve, of the high-pressure filter is installed on the hydraulic pipeline. And a second one-way valve is installed on the hydraulic branch pipe, and the second one-way valve limits conveying of hydraulic oil towards the direction of the oil tank. The hydraulic system has the effect of reducing the probability that impurities are brought into the hydraulic system during oil return.

Description

Technical Field

[0001] The present application relates to the field of hydraulic systems, and in particular to a hydraulic system with a filter circuit and hydraulic equipment using the hydraulic system. Background Art

[0002] The hydraulic system is a technical system that uses liquid pressure energy to transmit power and perform control. It is usually composed of hydraulic pumps, hydraulic cylinders, hydraulic valves, oil tanks, oil pipes and other components. The hydraulic system converts mechanical energy into liquid pressure energy through a hydraulic pump, and then converts liquid pressure energy into mechanical energy through actuators such as hydraulic cylinders, thereby realizing various mechanical movements. The hydraulic system has the advantages of smooth transmission, fast response speed, large load-bearing capacity, and easy automation. It has been widely used in engineering machinery, agricultural machinery, aerospace, ships and other fields.

[0003] When using hydraulic systems, components often get stuck, causing the system to not work properly. The main reason for the jamming of system components is that the impurities generated by the wear of external actuators during operation and the chemical reaction of the medium itself are brought into the hydraulic system during oil return. Utility Model Content

[0004] In order to reduce the probability of impurities being brought into the hydraulic system during oil return, the present application provides a hydraulic system with a filtering circuit.

[0005] The present application provides a hydraulic system with a filter circuit adopting the following technical solution:

[0006] A hydraulic system with a filtering circuit comprises an oil tank and an actuator, a hydraulic pipeline is arranged between the oil tank and the actuator, the oil tank and the actuator are connected through the hydraulic pipeline, a power part is installed on the hydraulic pipeline, a high-pressure filter is installed on the hydraulic pipeline, a first one-way valve is installed on the side of the hydraulic filter away from the actuator, the first one-way valve limits the delivery of hydraulic oil toward the actuator, a hydraulic branch pipe is connected to and communicated with the hydraulic pipeline, one end of the hydraulic branch pipe is installed on the hydraulic pipeline at the side of the high-pressure filter away from the first one-way valve, and the other end is installed on the hydraulic pipeline at the side of the first one-way valve away from the high-pressure filter, and a second one-way valve is installed on the hydraulic branch pipe, and the second one-way valve limits the delivery of hydraulic oil toward the oil tank.

[0007] By adopting the above technical solution, a high-pressure filter is set between the oil tank and the actuator to filter the return hydraulic oil, thereby reducing the probability of impurities being brought into the hydraulic system during return oil. Since the return oil has high pressure, general mortgage filtering cannot be used, and the use of high-pressure filtering will affect the normal oil output. Therefore, a first one-way valve is set on the hydraulic pipeline and a hydraulic branch pipe and a second one-way valve are set at the same time, so that the return oil and the oil output are respectively carried out through different channels, thereby ensuring the filtering effect during return oil, and at the same time reducing the influence of the high-pressure filter setting on the oil output.

[0008] Optionally, a pressure gauge and an electromagnetic overflow valve are provided between the first one-way valve and the oil tank, and the pressure gauge is installed on a hydraulic pipeline, and the hydraulic pipeline is connected to and communicates with the electromagnetic overflow valve.

[0009] By adopting the above technical solution, the pressure gauge is used to detect the hydraulic pressure of the hydraulic pipeline. When the hydraulic pressure in the hydraulic pipeline is too high, the electromagnetic overflow valve discharges part of the hydraulic oil to relieve the pressure, thereby reducing the probability of accidents caused by excessive hydraulic pressure.

[0010] Optionally, a one-way throttle valve is installed on the hydraulic pipeline, and the one-way throttle valve is installed between the first one-way valve and the electromagnetic overflow valve.

[0011] By adopting the above technical solution, the one-way throttle valve can discharge oil normally when discharging oil, and play a role of load resistance when returning oil.

[0012] Optionally, a hydraulically controlled one-way valve is installed on the hydraulic pipeline, and the hydraulically controlled one-way valve is installed between the one-way throttle valve and the electromagnetic overflow valve. A return pipeline is connected and communicated between the hydraulically controlled one-way valve and the oil tank.

[0013] By adopting the above technical solution, the hydraulically controlled one-way valve setting can reduce the probability of reverse flow of hydraulic oil when discharging or returning oil, thereby ensuring that the hydraulic oil flows in a predetermined direction, thereby preventing the probability of system damage or reduced efficiency caused by reverse flow of hydraulic oil.

[0014] Optionally, a solenoid reversing valve is provided on the side of the hydraulically controlled one-way valve facing the oil tank, and the return pipe and the hydraulic pipe are both connected to the solenoid reversing valve.

[0015] By adopting the above technical solution, the setting of the electromagnetic reversing valve can flexibly control the flow rate of oil outlet and oil return.

[0016] Optionally, the return pipe is connected to and communicates with an electromagnetic overflow valve.

[0017] By adopting the above technical solution, the return pipe connected to the electromagnetic overflow valve can reduce the probability of accidents caused by excessive hydraulic pressure during return flow.

[0018] A hydraulic device using a hydraulic system comprises a body, wherein the oil tank is installed inside the body, and the power component, electromagnetic overflow valve, electromagnetic reversing valve, hydraulically controlled one-way valve, one-way throttle valve and high-pressure filter are all installed on the upper surface of the body.

[0019] By adopting the above technical solution, installation space is provided for components through the machine body.

[0020] Optionally, an air filter is installed on the upper surface of the body, and the air filter is connected to the oil tank.

[0021] By adopting the above technical solution, the air filter can reduce the probability of dust and impurities entering the fuel tank.

[0022] Optionally, a liquid level gauge is installed on the side wall of the machine body, and the liquid level gauge is connected to the oil tank.

[0023] By adopting the above technical solution, the liquid level meter can conveniently observe the amount of hydraulic oil inside the oil tank.

[0024] Optionally, the high-pressure filter includes a shell and a filter element, the shell is mounted on the machine body, and the filter element is detachably mounted in the shell.

[0025] By adopting the above technical solution, when the filter element is used for a long time, a large amount of impurities will adhere to the filter element, thereby affecting the filtering efficiency of the filter element. The influence of impurity adhesion on the filtering efficiency of the filter element can be reduced by using a follow-ring filter element.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By setting a high-pressure filter between the oil tank and the actuator, the hydraulic oil of the return oil is filtered to reduce the probability of impurities being brought into the hydraulic system during the return oil. Since the return oil has high pressure, the general mortgage filter cannot be used, and the use of high-pressure filtering will affect the normal oil output. Therefore, the first one-way valve and the hydraulic branch pipe and the second one-way valve are set on the hydraulic pipeline, so that the return oil and the oil output are respectively carried out through different channels, which ensures the filtering effect during the return oil, and also reduces the influence of the high-pressure filter setting on the oil output;

[0028] 2. The pressure gauge is used to detect the hydraulic pressure of the hydraulic pipeline. When the hydraulic pressure in the hydraulic pipeline is too high, the electromagnetic overflow valve discharges part of the hydraulic oil to relieve the pressure, thereby reducing the probability of accidents caused by excessive hydraulic pressure;

[0029] 3. The hydraulically controlled one-way valve can reduce the probability of reverse flow of hydraulic oil when discharging or returning oil, thereby ensuring that the hydraulic oil flows in the predetermined direction, thereby preventing the probability of system damage or reduced efficiency caused by reverse flow of hydraulic oil;

[0030] 4. The setting of the electromagnetic reversing valve can flexibly control the flow rate of oil output and oil return;

[0031] 5. After the filter element has been used for a long time, a large amount of impurities will adhere to the filter element, thus affecting the filtering efficiency of the filter element. The influence of impurity adhesion on the filtering efficiency of the filter element can be reduced by using a follow-up filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the hydraulic system of the present application.

[0033] Figure 2 It is a schematic diagram of the overall structure of the first embodiment of the hydraulic equipment of the present application.

[0034] Figure 3 yes Figure 2 Magnified view of part A in the middle.

[0035] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the hydraulic equipment of the present application.

[0036] Figure 5 yes Figure 4 Magnified view of part B in the middle.

[0037] Explanation of the reference numerals in the accompanying drawings: 1. oil tank; 2. actuator; 3. hydraulic pipeline; 4. power part; 41. hydraulic pump; 42. pump sleeve; 43. electric motor; 5. high-pressure filter; 51. housing; 511. fixed part; 512. sliding part; 52. filter element; 6. hydraulic branch pipe; 7. first non-return valve; 8. second non-return valve; 9. pressure gauge; 10. electromagnetic overflow valve; 11. one-way throttle valve; 12. hydraulically controlled non-return valve; 13. return pipe; 14. electromagnetic reversing valve; 15. third non-return valve; 16. machine body; 17. air filter; 18. liquid level gauge; 19. valve body. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-5 This application is described in further detail.

[0039] The present application embodiment discloses a hydraulic system with a filter circuit, referring to Figure 1, including an oil tank 1 and an actuator 2. The actuator 2 in the present application is a working element driven in the hydraulic system. In this embodiment, a plunger cylinder is selected. A hydraulic pipeline 3 is arranged between the oil tank 1 and the actuator 2. The oil tank 1 and the actuator 2 are connected through the hydraulic pipeline 3. A power piece 4 is installed on the hydraulic pipeline 3. The power piece 4 includes a hydraulic pump 41 installed on the hydraulic pipeline 3, a pump sleeve 42 installed on the hydraulic pump 41, and an electric motor 43 installed on the pump sleeve 42. A high-pressure filter 5 is installed on the hydraulic pipeline 3. A first non-return valve 7 is installed on the side of the hydraulic filter away from the actuator 2. The first non-return valve 7 limits the delivery of hydraulic oil toward the actuator 2. A hydraulic branch pipe 6 is connected and communicated with the hydraulic pipeline 3. One end of the hydraulic branch pipe 6 is connected to the high-pressure filter. The filter 5 is installed on the hydraulic pipeline 3 at one end away from the first one-way valve 7, and the other end is installed on the hydraulic pipeline 3 at the side of the first one-way valve 7 away from the high-pressure filter 5. A second one-way valve 8 is installed on the hydraulic branch pipe 6. The second one-way valve 8 limits the delivery of hydraulic oil toward the oil tank 1. The power piece 4 is used to drive the hydraulic oil to be discharged. The hydraulic oil passes through the hydraulic pipeline 3 and enters the hydraulic branch pipe 6. Then, it passes through the second one-way valve 8 and returns to the hydraulic pipeline 3 and passes into the actuator 2 to drive the actuator 2 to work. When the oil is returned subsequently, the hydraulic oil enters the hydraulic pipeline 3 and passes through the high-pressure filter 5 for filtering, and then passes through the first one-way valve 7 and returns to the oil tank 1. The high-pressure filter 5 filters the returned hydraulic oil to reduce the probability of impurities being brought into the hydraulic system during oil return.

[0040] Reference Figure 1 A pressure gauge 9 and an electromagnetic overflow valve 10 are provided between the first one-way valve 7 and the oil tank 1. The pressure gauge 9 is installed on the hydraulic pipeline 3. The pressure gauge 9 is used to detect the hydraulic pressure of the hydraulic pipeline 3. A pressure gauge 9 switch is installed on the pressure gauge 9. The setting of the pressure gauge 9 switch can open the pressure gauge 9 when detection is required, and close the pressure gauge 9 when detection is not required. The hydraulic pipeline 3 is connected and communicated with the electromagnetic overflow valve 10. When the hydraulic pressure in the hydraulic pipeline 3 is too high, the electromagnetic overflow valve 10 discharges part of the hydraulic oil to discharge the pressure, thereby reducing the probability of accidents caused by excessive hydraulic pressure;

[0041] Reference Figure 1A one-way throttle valve 11 is installed on the hydraulic pipeline 3, and the one-way throttle valve 11 is installed between the first one-way valve 7 and the electromagnetic overflow valve 10. The one-way throttle valve 11 can discharge oil normally when discharging oil, and plays a role of load resistance when returning oil; a hydraulically controlled one-way valve 12 is installed on the hydraulic pipeline 3, and the hydraulically controlled one-way valve 12 is installed between the one-way throttle valve 11 and the electromagnetic overflow valve 10. A return pipe 13 is connected and connected between the hydraulically controlled one-way valve 12 and the oil tank 1. The hydraulically controlled one-way valve 12 is set to reduce the probability of reverse flow of hydraulic oil when discharging oil or returning oil, thereby ensuring that the hydraulic oil flows in a predetermined direction, thereby preventing the probability of system damage or reduced efficiency caused by the reverse flow of hydraulic oil; the hydraulically controlled one-way valve 12 is directed toward the oil tank 1 is provided with an electromagnetic reversing valve 14 on one side, the return pipe 13 and the hydraulic pipe 3 are both connected to the electromagnetic reversing valve 14, the setting of the electromagnetic reversing valve 14 can flexibly control the flow rate of oil outflow and oil return, and the third one-way valve 15 is installed on the hydraulic pipe 3 on the side of the electromagnetic reversing valve 14 facing the oil tank 1, and the third one-way valve 15 limits the hydraulic oil in the electromagnetic reversing valve 14 from flowing back from the hydraulic pipe 3 to the oil tank 1; the return pipe 13 is connected and communicated with the electromagnetic overflow valve 10, and the return pipe connected to the electromagnetic overflow valve 10 can reduce the probability of accidents caused by excessive hydraulic pressure during reflux, and the electromagnetic overflow valve 10 has a reversing function. The use of the electromagnetic overflow valve 10 as a overflow valve can achieve the role of safety protection through a single overflow valve during oil outflow and oil return.

[0042] Embodiment 1:

[0043] A hydraulic device using a hydraulic system, referring to Figure 2 and Figure 3 , including a body 16 which is rectangular as a whole, an oil tank 1 is installed inside the body 16, a power part 4, an electromagnetic overflow valve 10, an electromagnetic reversing valve 14, a hydraulically controlled one-way valve 12, a one-way throttle valve 11, and a high-pressure filter 5 are all installed on the upper surface of the body 16, and the body 16 provides installation space for the components. A valve body 19 is provided on the upper surface of the body 16, and the high-pressure filter 5 is installed on the valve body 19. The hydraulic branch pipe 6, the first one-way valve 7 and the second one-way valve 8 are all arranged in the valve body 19.

[0044] Reference Figure 2 and Figure 3 An air filter 17 is installed on the upper surface of the body 16, and the air filter 17 is connected to the oil tank 1. The air filter 17 can reduce the probability of dust and impurities entering the oil tank 1; a liquid level gauge 18 is installed on the side wall of the body 16, and the liquid level gauge 18 is connected to the oil tank 1. The liquid level gauge 18 can conveniently observe the amount of hydraulic oil inside the oil tank 1.

[0045] Reference Figure 2 and Figure 3The high-pressure filter 5 includes a housing 51 mounted on the body 16 through a valve body 19 and a filter element 52 detachably mounted in the housing 51. A top cover is detachably mounted on the top of the housing 51. The filter element 52 can be replaced by removing the top cover and then removing the filter element 52, so that the filter element 52 can be easily replaced after being used for a long time or when it is damaged.

[0046] The implementation principle of the embodiment of the present application is as follows: the hydraulic oil is sent out of the oil tank 1 through the hydraulic pipeline 3, and the hydraulic oil passes through the third one-way valve 15, the solenoid reversing valve 14, the hydraulically controlled one-way valve 12, the one-way part of the one-way throttle valve 11, and the second one-way valve 8 in sequence, and then enters the actuator 2 to drive the actuator 2, and then the hydraulic oil returns to the oil tank 1 through the hydraulic pipeline 3. During this period, the hydraulic oil passes through the first one-way valve 7, the throttling part of the one-way throttle valve 11, the hydraulically controlled one-way valve 12 and the solenoid reversing valve 14 in sequence to complete the circulation of the hydraulic system.

[0047] Embodiment 2:

[0048] The difference between this embodiment and the first embodiment lies in the different structure of the high pressure filter 5 .

[0049] Reference Figure 4 and Figure 5 The high-pressure filter 5 includes a shell 51 installed on the body 16 through the valve body 19 and a filter element 52 detachably installed in the shell 51. The shell 51 includes a fixed part and a sliding part. The shell 51 is fixed to the valve body 19. The sliding part is installed on the fixed part. Both ends of the sliding part in the length direction are provided with placement grooves. The sliding part slides to form a filter cavity with one of the installation grooves and the fixed part. The filter element 52 is detachably installed in the placement groove. The placement groove is replaced by sliding the sliding part. A new filter element 52 is installed in the placement groove outside the shell 51. The new filter element 52 is sent into the fixed part by driving the sliding part to slide, and the old filter element 52 is sent out of the fixed part, thereby realizing the rapid replacement of the new and old filter elements 52.

[0050] The implementation principle of the embodiment of the present application is as follows: the hydraulic oil is sent out of the oil tank 1 through the hydraulic pipeline 3, and the hydraulic oil passes through the third one-way valve 15, the solenoid reversing valve 14, the hydraulically controlled one-way valve 12, the one-way part of the one-way throttle valve 11, and the second one-way valve 8 in sequence, and then enters the actuator 2 to drive the actuator 2, and then the hydraulic oil returns to the oil tank 1 through the hydraulic pipeline 3. During this period, the hydraulic oil passes through the first one-way valve 7, the throttling part of the one-way throttle valve 11, the hydraulically controlled one-way valve 12 and the solenoid reversing valve 14 in sequence to complete the circulation of the hydraulic system.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydraulic system with a filter circuit, comprising an oil tank (1) and an actuator (2), wherein a hydraulic pipeline (3) is provided between the oil tank (1) and the actuator (2), the oil tank (1) and the actuator (2) are connected via the hydraulic pipeline (3), a power member (4) is installed on the hydraulic pipeline (3), and the system is characterized in that: A high-pressure filter (5) is installed on the hydraulic pipeline (3); a first one-way valve (7) is installed on the side of the hydraulic filter facing away from the actuator (2); the first one-way valve (7) limits the delivery of hydraulic oil in the direction of the actuator (2); a hydraulic branch pipe (6) is connected to and communicates with the hydraulic pipeline (3); one end of the hydraulic branch pipe (6) is installed on the hydraulic pipeline (3) at the side of the high-pressure filter (5) facing away from the first one-way valve (7); and the other end of the hydraulic branch pipe (6) is installed on the hydraulic pipeline (3) at the side of the first one-way valve (7) facing away from the high-pressure filter (5); a second one-way valve (8) is installed on the hydraulic branch pipe (6); the second one-way valve (8) limits the delivery of hydraulic oil in the direction of the oil tank (1).

2. A hydraulic system with a filter circuit according to claim 1, characterized in that: A pressure gauge (9) and an electromagnetic overflow valve (10) are provided between the first one-way valve (7) and the oil tank (1); the pressure gauge (9) is installed on the hydraulic pipeline (3); and the hydraulic pipeline (3) is connected to and communicates with the electromagnetic overflow valve (10).

3. A hydraulic system with a filter circuit according to claim 2, characterized in that: A one-way throttle valve (11) is installed on the hydraulic pipeline (3), and the one-way throttle valve (11) is installed between the first one-way valve (7) and the electromagnetic overflow valve (10).

4. A hydraulic system with a filter circuit according to claim 3, characterized in that: A hydraulically controlled one-way valve (12) is installed on the hydraulic pipeline (3); the hydraulically controlled one-way valve (12) is installed between the one-way throttle valve (11) and the electromagnetic overflow valve (10); a return pipeline (13) is provided between the hydraulically controlled one-way valve (12) and the oil tank (1), and the two are connected and communicated with each other.

5. A hydraulic system with a filter circuit according to claim 4, characterized in that: An electromagnetic reversing valve (14) is provided on the side of the hydraulically controlled one-way valve (12) facing the oil tank (1), and the return pipe (13) and the hydraulic pipe (3) are both connected to the electromagnetic reversing valve (14).

6. A hydraulic system with a filter circuit according to claim 5, characterized in that: The return pipe (13) is connected to and communicates with the electromagnetic overflow valve (10).

7. A hydraulic device using the hydraulic system with a filter circuit as claimed in claim 6, characterized in that: The invention comprises a machine body (16), wherein the oil tank (1) is installed inside the machine body (16), and the power component (4), the electromagnetic overflow valve (10), the electromagnetic reversing valve (14), the hydraulically controlled one-way valve (12), the one-way throttle valve (11), and the high-pressure filter (5) are all installed on the upper surface of the machine body (16).

8. A hydraulic device according to claim 7, characterized in that: An air filter (17) is mounted on the upper surface of the machine body (16), and the air filter (17) is connected to the oil tank (1).

9. A hydraulic device according to claim 8, characterized in that: A liquid level meter (18) is installed on the side wall of the machine body (16), and the liquid level meter (18) is connected to the oil tank (1).

10. A hydraulic device according to claim 9, characterized in that: The high-pressure filter (5) comprises a housing (51) and a filter element (52); the housing (51) is mounted on a machine body (16); and the filter element (52) is detachably mounted in the housing (51).

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