Pressure maintaining hydraulic system facilitating replacement of filtering device

Abstract

The utility model relates to the technical field of hydraulic systems, in particular to a pressure maintaining hydraulic system convenient for replacement of a filter device, which comprises a mounting rack, a hydraulic oil tank, a fixing ring, a filter component and a pump machine, the hydraulic oil tank is mounted on the inner side of the bottom of the mounting rack, and the fixing ring is arranged at the top of the hydraulic oil tank; the pressure maintaining hydraulic system comprises a hydraulic oil tank, a fixing ring and a pump, the fixing ring is arranged on the top of the hydraulic oil tank, the filter assembly is clamped in the fixing ring, the pump is arranged on the top of the hydraulic oil tank, and the filter assembly comprises an outer shell, an oil inlet pipe, an oil outlet pipe, an oil pressure sensor, an end cover, a connecting ring and a filter screen assembly. And the oil pressure sensor is additionally arranged at the oil outlet end of the filtering assembly, the pump power is adjusted according to the oil pressure fed back by the sensor, it is guaranteed that sufficient oil enters the hydraulic system, the oil pressure sensor can also feed back the circulation effect of the filtering net, and therefore the filtering net assembly can be fed back and replaced in time.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, and in particular to a pressure-maintaining hydraulic system that facilitates the replacement of filter devices. Background Technology

[0002] A hydraulic system is a mechanical system that uses the pressure energy of a liquid for energy conversion and control. It mainly uses hydraulic oil as the working medium and utilizes the pressure energy of the liquid to drive various actuators (such as hydraulic cylinders and hydraulic motors) to complete various actions.

[0003] In hydraulic systems, hydraulic oil is a crucial working medium. During use, wear and tear or impurities can occur in the transmission pipelines and power components of the entire hydraulic system. These impurities can severely affect the stability of the hydraulic system and cause blockages in narrow areas. Therefore, a filter is usually added to the hydraulic oil tank. However, this simple filtration cannot guarantee the quality of the oil drawn by the power components. Thus, a filter needs to be added at the connection between the oil tank and the hydraulic system. This filter often obstructs the flow of oil and affects the oil pressure of the entire hydraulic system. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a pressure-holding hydraulic system that facilitates the replacement of filter devices.

[0005] This utility model is achieved through the following technical solution:

[0006] A pressure-holding hydraulic system for easy filter replacement includes a mounting bracket, a hydraulic oil tank, a retaining ring, a filter assembly, and a pump. The hydraulic oil tank is installed on the inner bottom of the mounting bracket, the retaining ring is located on the top of the hydraulic oil tank, the filter assembly is snapped into the retaining ring, and the pump is located on the top of the hydraulic oil tank. The filter assembly includes a housing, an inlet pipe, an outlet pipe, an oil pressure sensor, an end cap, a connecting ring, and a filter screen assembly. The inlet pipe is fixedly located at the bottom of one end of the housing, the outlet pipe is connected to the top of the housing opposite to the inlet pipe, the oil pressure sensor is installed on the outside of the outlet pipe, the end cap is connected to the inner side of one end of the housing, the connecting ring is fixedly located on the inner side of the housing, and the filter screen assembly is fixedly installed and fixed to the connecting ring.

[0007] In a preferred embodiment of the present invention, the filter assembly includes a mounting ring, a support frame, a filter screen, a magnetic strip, and an operation plate. The support frame is fixedly disposed on the outside of the mounting ring, the filter screen is snapped into the inside of the support frame, the magnetic strip is fixedly disposed on the inside of the support frame, and the operation plate is fixedly connected to the inside of the mounting ring.

[0008] The filter assembly is mainly located at the oil inlet of the pump to effectively filter the oil entering the hydraulic system, preventing impurities in the oil drawn from the hydraulic tank from entering the hydraulic system and ensuring the safe and stable operation of the hydraulic system.

[0009] In a preferred embodiment of the present invention, the inner side of the connecting ring is provided with a thread, the mounting ring and the connecting ring are connected by the thread, and a sealing ring is provided on the outer side of the mounting ring at the contact point between the mounting ring and the connecting ring.

[0010] The filter assembly is connected to the connecting ring via the outer thread of the mounting ring, and the connection is sealed by a sealing ring to ensure effective filtration of the oil entering the hydraulic system.

[0011] In a preferred embodiment of the present invention, the outer side of the end cap is provided with threads, one end of the outer shell is provided with a threaded hole that mates with it, and a regular polygonal operating ring is provided on the outside of the end cap.

[0012] In a preferred embodiment of this utility model, the inner side of the support frame is provided with a slot that cooperates with the magnetic strip, and the support frame has a frustum-shaped structure;

[0013] The magnetic strip is mainly used to attract iron filings and other impurities in the oil, while the frustum-shaped support frame mainly increases the filter screen area, thereby reducing obstruction to the flow of oil.

[0014] The beneficial effects of this utility model are:

[0015] This pressure-holding hydraulic system, which facilitates filter replacement, adds a filter assembly between the hydraulic oil tank and the pump, thereby greatly reducing the impurity content in the oil entering the hydraulic system. An oil pressure sensor is added to the oil outlet of the filter assembly. The pump power is adjusted based on the oil pressure feedback from the sensor to ensure sufficient oil enters the hydraulic system. The oil pressure sensor can also provide feedback on the flow effect of the filter screen, thus providing timely feedback and allowing for the replacement of the filter screen assembly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the pressure-holding hydraulic system for easy replacement of the filter device according to this utility model.

[0017] Figure 2 This is a schematic diagram of the filter assembly structure of the pressure-holding hydraulic system for easy filter replacement according to the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of the filter assembly of the pressure-holding hydraulic system for easy replacement of the filter device according to this utility model.

[0019] Figure 4 This is a schematic diagram of the filter assembly structure of the pressure-holding hydraulic system of the present invention, which facilitates the replacement of the filter device.

[0020] In the diagram: 1. Mounting bracket; 2. Hydraulic oil tank; 3. Fixing ring; 4. Filter assembly; 41. Housing; 42. Oil inlet pipe; 43. Oil outlet pipe; 44. Oil pressure sensor; 45. End cap; 46. Connecting ring; 47. Filter screen assembly; 471. Mounting ring; 472. Support frame; 473. Filter screen; 474. Magnetic strip; 475. Control panel; 5. Pump. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0022] like Figure 1-4 The pressure-holding hydraulic system shown includes a mounting frame 1, a hydraulic oil tank 2, a retaining ring 3, a filter assembly 4, and a pump 5. The hydraulic oil tank 2 is installed on the inner bottom of the mounting frame 1, the retaining ring 3 is located on the top of the hydraulic oil tank 2, the filter assembly 4 is snapped into the inside of the retaining ring 3, and the pump 5 is located on the top of the hydraulic oil tank 2. The filter assembly 4 includes a housing 41, an inlet pipe 42, an outlet pipe 43, an oil pressure sensor 44, an end cap 45, a connecting ring 46, and a filter screen assembly 47. The inlet pipe 42 is fixedly installed at the bottom of one end of the housing 41, the outlet pipe 43 is connected to the top of the housing 41 away from the inlet pipe 42, the oil pressure sensor 44 is installed on the outside of the outlet pipe 43, the end cap 45 is connected to the inner side of one end of the housing 41, the connecting ring 46 is fixedly installed on the inner side of the housing 41, and the filter screen assembly 47 is installed and fixed to the connecting ring 46.

[0023] Specifically, the filter assembly 47 includes a mounting ring 471, a support frame 472, a filter screen 473, a magnetic strip 474, and an operating plate 475. The support frame 472 is fixedly disposed on the outside of the mounting ring 471, the filter screen 473 is snapped into the support frame 472, the magnetic strip 474 is fixedly disposed on the inside of the support frame 472, the operating plate 475 is fixedly connected to the inside of the mounting ring 471, the connecting ring 46 is provided with threads on the inside, and the mounting ring 471 and the connecting ring 46 are connected by threads. A sealing ring is provided on the outside of the mounting ring 471 at the contact point between the mounting ring 471 and the connecting ring 46. The end cap 45 is provided with threads on the outside. One end of the outer casing 41 has a threaded hole that mates with it. The end cap 45 has a regular polygonal operating ring on the outside. The support frame 472 has a slot that mates with the magnetic strip 474 on the inside. The support frame 472 has a frustum-shaped structure.

[0024] In this embodiment, when the pump 5 is working, the oil is drawn out from the hydraulic oil tank 2, flows through the hydraulic system, and then returns to the hydraulic oil tank 2. Between the hydraulic oil tank 2 and the pump 5, a filter assembly 4 is installed through a fixing ring 3. Impurities such as iron filings in the oil are attracted by the magnetic strip 474, while other impurities in the oil are effectively blocked by the filter screen 473, greatly reducing the impurities in the oil entering the hydraulic system.

[0025] Furthermore, when the pump 5 operates at a certain power, the value measured by the oil pressure sensor 44 installed at the oil outlet pipe 43 should be stable within a certain range. Based on the feedback from the oil pressure sensor 44, the power of the pump 5 can be adjusted to ensure the oil pressure entering the hydraulic system. When the pump 5 operates at a certain power, and the value of the oil pressure sensor 44 is significantly lower than the set range, it indicates that a blockage has occurred in the filter assembly 4, and the filter screen assembly 47 needs to be replaced in time. Simply rotate the end cover 45 to remove it. The polygonal operating ring on the outside of the end cover 45 facilitates the installation and removal of the end cover 45. After removing the end cover 45, the operating plate 475 on the inside of the mounting ring 471 facilitates the installation and removal of the filter screen assembly 47 in the connecting ring 46, thereby realizing the quick replacement of the filter screen assembly 47.

[0026] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0027] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A pressure maintaining hydraulic system facilitating filter device replacement, comprising a mounting frame (1), a hydraulic oil tank (2), a fixing ring (3), a filter assembly (4) and a pump machine (5), characterized in that: The hydraulic oil tank (2) is mounted on the bottom of the mounting frame (1), the fixed ring (3) is arranged on the top of the hydraulic oil tank (2), the filter assembly (4) is clamped in the fixed ring (3), and the pump (5) is arranged on the top of the hydraulic oil tank (2). The filter assembly (4) comprises an outer shell (41), an oil inlet pipe (42), an oil outlet pipe (43), an oil pressure sensor (44), an end cover (45), a connecting ring (46) and a filter screen assembly (47). The oil inlet pipe (42) is fixedly arranged at one end of the bottom of the outer shell (41), the oil outlet pipe (43) is connected with one end of the top of the outer shell (41) away from the oil inlet pipe (42), the oil pressure sensor (44) is mounted on the outer side of the oil outlet pipe (43), the end cover (45) is connected with one end of the inner side of the outer shell (41), the connecting ring (46) is fixedly arranged on the inner side of the outer shell (41), and the filter screen assembly (47) is fixedly mounted with the connecting ring (46).

2. The pressure-retaining hydraulic system with ease of filter replacement of claim 1, wherein: The filter screen assembly (47) comprises a mounting ring (471), a support frame (472), a filter screen (473), a magnetic strip (474) and an operation plate (475). The support frame (472) is fixedly arranged on the outer side of the mounting ring (471), the filter screen (473) is clamped in the support frame (472), the magnetic strip (474) is fixedly arranged on the inner side of the support frame (472), and the operation plate (475) is fixedly connected with the inner side of the mounting ring (471).

3. The pressure maintenance hydraulic system that facilitates filter assembly replacement of claim 2, wherein: The inner side of the connecting ring (46) is provided with threads, the mounting ring (471) is connected with the connecting ring (46) through threads, and a sealing ring is arranged on the outer side of the mounting ring (471) and located at the abutting position of the mounting ring (471) and the connecting ring (46).

4. The pressure maintenance hydraulic system that facilitates filter assembly replacement of claim 1, wherein: The outer side of the end cover (45) is provided with threads, the inner side of one end of the outer shell (41) is provided with a threaded hole matched with the threads, and the outer side of the end cover (45) is provided with a regular polygon operation ring.

5. The pressure maintenance hydraulic system that facilitates filter assembly replacement of claim 2, wherein: The inner side of the support frame (472) is provided with a clamping groove matched with the magnetic strip (474), and the support frame (472) has a circular truncated cone structure.

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