Overflow type hydraulic filter

Abstract

The overflow type hydraulic filter comprises a filter body, a filter element fixed in the filter body, an upper shell fixed at an opening of the filter body and an overpressure protection mechanism, and the overpressure protection mechanism comprises an overflow plate, a valve plate, a barrel and a lifting plate; an overflow plate is coaxially and fixedly arranged in the upper shell, an overflow hole is horizontally formed in the overflow plate in a penetrating mode, and a barrel is vertically and fixedly arranged at the upper end of the upper shell located above the overflow plate; the overflow type hydraulic filter overcomes the defects that in the prior art, when an elastic component of a valve plate assembly is used for a long time, elasticity becomes poor, regular replacement is needed, time and labor are wasted, the cost is low, and the like. In the using process, due to the fact that the elasticity of the elastic component becomes poor, when the oil pressure is lower than an initial safety value, the valve plate assembly is opened, and normal use of the filter is affected.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic filters, and more specifically, to an overflow type hydraulic filter. Background Art

[0002] Hydraulic filters are used to filter impurities in the fuel system to ensure the cleanliness of the oil. The oil in the fuel system enters the filter cavity through the upper housing inlet, and under the action of the pressure difference, the oil passes through the filter element and flows out from the upper housing outlet, thus playing the role of filtering the oil.

[0003] After retrieval, the Chinese patent application number is "CN202323047156.9", which discloses an overflow type hydraulic filter, including a hydraulic filter body. In the upper housing of the hydraulic filter body, there are: mounting holes for connecting its upper oil inlet and oil outlet; a valve plate assembly and an elastic member. The valve plate assembly is located at one end of the mounting hole close to the oil outlet, and the elastic member is used to act as the driving force for the valve plate assembly to move towards the mounting hole, so as to block the mounting hole by the valve plate assembly. When in use, when the oil pressure is too high, the present utility model has an overflow function, thus avoiding the situation of damage to the product caused by too high oil pressure.

[0004] The inventors found the following problems in the process of implementing the present utility model: During long-term use, the elastic member of the valve plate assembly in the prior art has a deteriorated elasticity and needs to be replaced regularly, which is time-consuming and laborious. Moreover, during use, due to the deteriorated elasticity of the elastic member, when the oil pressure is lower than the initially set safety value, the valve plate assembly will be opened, affecting the normal use of the filter.

[0005] Therefore, it is an urgent problem to be solved by the present invention to provide an overflow type hydraulic filter that realizes automatic monitoring of the oil pressure value at the oil inlet during use, can automatically start the overpressure protection mechanism to achieve automatic pressure relief to protect the hydraulic filter when the oil pressure is higher than the threshold value, and extends the service life. Summary of the Invention

[0006] Aiming at the above technical problems, the object of the present invention is to overcome the problems that the elastic member of the valve plate assembly in the prior art has a deteriorated elasticity during long-term use, needs to be replaced regularly, which is time-consuming and laborious, and during use, due to the deteriorated elasticity of the elastic member, when the oil pressure is lower than the initially set safety value, the valve plate assembly will be opened, affecting the normal use of the filter. Thus, an overflow type hydraulic filter is provided that realizes automatic monitoring of the oil pressure value at the oil inlet during use, can automatically start the overpressure protection mechanism to achieve automatic pressure relief to protect the hydraulic filter when the oil pressure is higher than the threshold value, and extends the service life.

[0007] To achieve the above object, the present invention provides an overflow type hydraulic filter, comprising: a filter body, a filter element fixed inside the filter body, an upper housing fixed at the open end of the filter body, and an overpressure protection mechanism. The overpressure protection mechanism includes: an overflow plate, a valve plate, a cylinder body, and a lifting plate. Among them, Inside the upper housing near the oil inlet, an overflow plate is coaxially and fixedly arranged to separate the oil inlet and the oil outlet. An overflow hole is horizontally penetrated through the overflow plate. At the upper end of the upper housing above the overflow plate, a cylinder body with an open end facing down is vertically and fixedly arranged. On the overflow plate near the oil inlet, a valve plate is vertically arranged, which can be attached to it and can move along the axial direction of the filter body to block or release the blocking relationship with the overflow hole on it. The top part of the valve plate passes through the top of the upper housing and extends into the cylinder body, and is fixedly connected to a lifting plate that is horizontally arranged and can be lifted and lowered inside it.

[0008] Preferably, a telescopic electric cylinder is vertically penetrated and fixedly arranged at the top of the cylinder body, and the telescopic end of the telescopic electric cylinder is fixed on the lifting plate.

[0009] Preferably, the telescopic electric cylinder is a servo electric cylinder.

[0010] Preferably, the overflow type hydraulic filter further includes a control system for controlling the telescopic electric cylinder to drive the lifting plate to drive the valve plate to rise to open the overflow hole on the overflow plate. The control system includes: a wireless pressure sensor fixed on the overflow plate, and a controller, a wireless communication module, and a power supply respectively fixed at the upper end of the upper housing. Among them, The wireless pressure sensor is used to collect the oil pressure signal at the oil inlet in real time, and transmit the oil pressure signal to the controller through the wireless communication module. The controller is used to receive and process the oil pressure signal collected by the wireless pressure sensor. When the oil pressure value is higher than the threshold, the controller issues an instruction to trigger the telescopic electric cylinder to open, so as to drive the telescopic electric cylinder to drive the lifting plate and the valve plate on it to rise, so that the overflow hole on the overflow plate is opened. The wireless communication module is used for communication between the wireless pressure sensor, the telescopic electric cylinder and the controller. The power supply is used to provide electrical energy for the entire system.

[0011] Preferably, a through hole for the valve plate to pass through is vertically penetrated and opened at the top of the upper housing, and a sealing ring is fixedly arranged in the through hole.

[0012] Preferably, a sealing pad is horizontally fixed on the lifting plate facing the valve plate.

[0013] According to the above technical solution, the beneficial effects of the overflow hydraulic filter provided by the present invention during use are as follows: (1) When the wireless pressure sensor monitors that the oil pressure exceeds the threshold value, the controller controls the electric telescopic rod to drive the lifting plate to drive the valve plate part to rise along the axial direction of the hydraulic filter body until the valve plate is separated from the overflow hole on the overflow plate, so as to release the blocking relationship of the valve plate to the overflow hole, so that the overflow hole is communicated with the oil inlet and the oil outlet, so that the hydraulic oil passes through the oil inlet, the overflow hole on the overflow plate and is discharged from the oil outlet in sequence, so as to relieve the damage caused by the too high hydraulic oil pressure to the entire hydraulic filter, thereby extending the service life of the hydraulic filter.

[0014] (2) When the monitored oil pressure value is lower than the threshold value, the controller controls the electric telescopic rod to drive the lifting plate to drive the valve plate to descend along the axial direction of the hydraulic filter body to its initial position, so that the valve plate blocks the overflow hole on the overflow plate.

[0015] In summary, the structure of the present invention is reliable, and during the use process, it realizes the automatic monitoring of the oil pressure value at the oil inlet. When the oil pressure is higher than the threshold value, it can automatically start the overpressure protection mechanism to start, realize automatic pressure relief to protect the hydraulic filter, and extend the service life.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part; and the parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic structural diagram of an overflow hydraulic filter provided in a preferred embodiment of the present invention; Figure 2 is a schematic internal structure diagram of an overflow hydraulic filter provided in a preferred embodiment of the present invention; Figure 3 is a schematic structural diagram of an overflow hydraulic filter at a certain moment during the working process provided in a preferred embodiment of the present invention; Figure 4 is a schematic structural diagram of the upper housing of an overflow hydraulic filter provided in a preferred embodiment of the present invention.

[0018] DESCRIPTION OF THE REFERENCE NUMERALS 1. Filter body; 2. Filter element; 3. Upper housing; 4. Oil inlet; 5. Oil outlet; 6. Overflow plate; 7. Valve plate; 8. Cylinder body; 9. Lifting plate; 10. Overflow hole; 11. Wireless pressure sensor; 12. Controller; 13. Wireless communication module; 14. Power supply; 15. Electric telescopic rod; 16. Sealing ring; 17. Gasket. Detailed implementation manners

[0019] The following will describe in detail the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present invention, and are not used to limit the present invention.

[0020] As Figures 1-4 shown, an overflow type hydraulic filter provided by the present invention includes: a filter body 1, a filter element 2 fixed inside the filter body 1, an upper housing 3 fixed at the open end of the filter body 1, and an overpressure protection mechanism. The overpressure protection mechanism includes: an overflow plate 6, a valve plate 7, a cylinder body 8, and a lifting plate 9. Among them, an overflow plate 6 is coaxially and fixedly arranged inside the upper housing 3 near the oil inlet 4 to separate the oil inlet 4 and the oil outlet 5, and an overflow hole 10 is horizontally penetrated through the overflow plate 6. A cylinder body 8 with a downward open end is vertically and fixedly arranged at the upper end of the upper housing 3 above the overflow plate 6. A valve plate 7 that can be attached to the overflow plate 6 near the oil inlet 4 and can move along the axial direction of the filter body 1 to block or release the blocking relationship with the overflow hole 10 thereon is vertically arranged on the overflow plate 6. The top part of the valve plate 7 passes through the top of the upper housing 3 and extends into the cylinder body 8 and is fixedly connected to a lifting plate 9 that is horizontally arranged and can be lifted and lowered therein.

[0021] In the above solution, during use, when the oil pressure in the oil inlet 4 is higher than the threshold value, it drives the valve plate 7 to move upward along the axial direction of the hydraulic filter body 1 until the valve plate 7 is separated from the overflow hole 10 on the overflow plate 6, so as to release the blocking relationship of the valve plate 7 with the overflow hole 10, thereby enabling the overflow hole 10 to communicate with the oil inlet 4 and the oil outlet 5, so that the hydraulic oil passes through the oil inlet 4, the overflow hole 10 on the overflow plate 6 in sequence and is discharged from the oil outlet 5, so as to relieve the damage caused to the entire hydraulic filter by the too high hydraulic oil pressure, thereby prolonging the service life of the hydraulic filter.

[0022] When the oil pressure value in the oil inlet 4 is lower than the threshold value, it drives the lifting plate 9 to drive the valve plate 7 to move downward along the axial direction of the hydraulic filter body 1 to its initial position, so that the valve plate 7 blocks the overflow hole 10 on the overflow plate 6.

[0023] In a preferred embodiment of the present invention, an electric telescopic rod 15 is fixedly arranged vertically through the top of the cylinder body 8, and the telescopic end of the electric telescopic rod 15 is fixed on the lifting plate 9.

[0024] In the above solution, during the process of driving the telescopic end of the electric telescopic rod 15 to extend out of or retract into its cylinder part, the lifting plate 9 is driven to drive the valve plate 7 to lift along the axial direction of the hydraulic filter body 1, so as to block or release the blocking relationship of the overflow holes 10 on the overflow plate 6.

[0025] In a preferred embodiment of the present invention, the electric telescopic rod 15 is a servo electric cylinder.

[0026] In the above solution, the servo electric cylinder is a modular product integrating a servo motor and a lead screw, and its speed is 0.1 - 2m / s. Because of the closed-loop servo control, the control accuracy is relatively high. It has the characteristics of low cost and flexible configuration, and is the best substitute for hydraulic cylinders and air cylinders.

[0027] In a preferred embodiment of the present invention, the overflow type hydraulic filter further includes a control system for controlling the electric telescopic rod 15 to drive the lifting plate 9 to drive the valve plate 7 to rise to open the overflow holes 10 on the overflow plate 6. The control system includes: a wireless pressure sensor 11 fixed on the overflow plate 6, and a controller 12, a wireless communication module 13 and a power supply 14 respectively fixed on the upper end of the upper housing 3; wherein, The wireless pressure sensor 11 is used to collect the oil pressure signal at the oil inlet 4 in real time, and transmit the oil pressure signal to the controller 12 through the wireless communication module 13; The controller 12 is used to receive and process the oil pressure signal collected by the wireless pressure sensor 11. When the oil pressure value is higher than the threshold, the controller 12 issues an instruction to trigger the electric telescopic rod 15 to start, so as to drive the electric telescopic rod 15 to drive the lifting plate 9 and the valve plate 7 thereon to rise, so that the overflow holes 10 on the overflow plate 6 are opened; The wireless communication module 13 is used for communication between the wireless pressure sensor 11, the electric telescopic rod 15 and the controller 12; The power supply 14 is used to provide electric energy for the whole system.

[0028] In the above solution, when the wireless pressure sensor 11 detects that the oil pressure exceeds the threshold value, the controller 12 controls the electric telescopic rod 15 to drive the lifting plate 9 to drive the valve plate 7 to rise partially along the axial direction of the hydraulic filter body 1 until the valve plate 7 is separated from the overflow hole 10 on the overflow plate 6, so as to release the blocking relationship of the valve plate 7 to the overflow hole 10, so that the overflow hole 10 is communicated with the oil inlet 4 and the oil outlet 5, so that the hydraulic oil passes through the oil inlet 4, the overflow hole 10 on the overflow plate 6 in sequence and is discharged from the oil outlet 5, so as to relieve the damage caused by the too high hydraulic oil pressure to the entire hydraulic filter, thereby prolonging the service life of the hydraulic filter.

[0029] When the monitored oil pressure value is lower than the threshold value, the controller 12 controls the electric telescopic rod 15 to drive the lifting plate 9 to drive the valve plate 7 to descend along the axial direction of the hydraulic filter body 1 to its initial position, so that the valve plate 7 blocks the overflow hole 10 on the overflow plate 6.

[0030] Therefore, the structure of the present invention is reliable, and during the use process, it realizes the automatic monitoring of the oil pressure value at the oil inlet 4. When the oil pressure is higher than the threshold value, the overpressure protection mechanism can be automatically started to realize automatic pressure relief to protect the hydraulic filter, and the service life is prolonged.

[0031] In a preferred embodiment of the present invention, a through hole for the valve plate 7 to pass through is vertically penetrated through the top of the upper housing 3, and a sealing ring 16 is fixedly arranged in the through hole.

[0032] In the above solution, it plays a sealing effect to prevent the hydraulic oil entering the oil inlet 4 from overflowing through the through hole.

[0033] In a preferred embodiment of the present invention, a sealing gasket 17 is horizontally fixedly arranged on the lifting plate 9 facing the valve plate 7.

[0034] In the above solution, it further plays a sealing effect to prevent the hydraulic oil entering the oil inlet 4 from overflowing through the through hole, greatly improving the sealing performance of the overpressure protection mechanism.

[0035] In summary, the overflow type hydraulic filter provided by the present invention overcomes the problems in the prior art that the elastic components of the valve plate assembly become less elastic after long-term use, need to be replaced regularly, are time-consuming and laborious, and during the use process, due to the decrease in the elasticity of the elastic components, the valve plate assembly will be opened when the oil pressure is lower than the initially set safety value, affecting the normal use of the filter.

[0036] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0037] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0038] Furthermore, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. An overflow hydraulic filter, comprising: Filter body (1), filter element (2) fixed inside the filter body (1), upper housing (3) fixed at the open end of the filter body (1), and overpressure protection mechanism, characterized in that the overpressure protection mechanism includes: overflow plate (6), valve plate (7), cylinder body (8) and lifting plate (9); wherein, Inside the upper housing (3) near the oil inlet (4), an overflow plate (6) is coaxially and fixedly arranged to separate the oil inlet (4) and the oil outlet (5), and an overflow hole (10) is horizontally penetrated through the overflow plate (6). At the upper end of the upper housing (3) above the overflow plate (6), a cylinder body (8) with an open end facing down is vertically and fixedly arranged. On the overflow plate (6) near the oil inlet (4), a valve plate (7) is vertically arranged, which can fit with it and can move along the axial direction of the filter body (1) to block or release the blocking relationship with the overflow hole (10) thereon. The top part of the valve plate (7) passes through the top of the upper housing (3) and extends into the cylinder body (8) and is fixedly connected with a lifting plate (9) which is horizontally arranged and can be lifted and lowered therein.

2. The overflow hydraulic filter according to claim 1, wherein, Vertically and fixedly arranged through the top of the cylinder body (8) is an electric telescopic rod (15), and the telescopic end of the electric telescopic rod (15) is fixed on the lifting plate (9).

3. The overflow hydraulic filter according to claim 2, characterized in that, The electric telescopic rod (15) is a servo electric cylinder.

4. The overflow hydraulic filter according to claim 2 or 3, characterized in that, This overflow type hydraulic filter further includes a control system for controlling the electric telescopic rod (15) to drive the lifting plate (9) to drive the valve plate (7) to rise to open the overflow hole (10) on the overflow plate (6). The control system includes: a wireless pressure sensor (11) fixed on the overflow plate (6), and a controller (12), a wireless communication module (13) and a power supply (14) respectively fixed at the upper end of the upper housing (3); wherein, The wireless pressure sensor (11) is used to collect the oil pressure signal at the oil inlet (4) in real time, and transmit the oil pressure signal to the controller (12) through the wireless communication module (13); The controller (12) is used to receive and process the oil pressure signal collected by the wireless pressure sensor (11). When the oil pressure value is higher than the threshold, the controller (12) issues an instruction to trigger the electric telescopic rod (15) to open, so as to drive the electric telescopic rod (15) to drive the lifting plate (9) and the valve plate (7) thereon to rise, so that the overflow hole (10) on the overflow plate (6) is opened; The wireless communication module (13) is used for communication between the wireless pressure sensor (11), the electric telescopic rod (15) and the controller (12); The power supply (14) is used to provide electric energy for the whole system.

5. The overflow hydraulic filter according to claim 1, characterized in that, Vertically penetrated through the top of the upper housing (3) is a through hole for the valve plate (7) to pass through, and a sealing ring (16) is fixedly arranged in this through hole.

6. The overflow hydraulic filter according to claim 1, characterized in that: Horizontally and fixedly arranged on the lifting plate (9) facing the valve plate (7) is a sealing gasket (17).

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