Hydraulic system with automatic filtering and cleaning functions

Abstract

The invention discloses a hydraulic system with automatic filtering and cleaning, which comprises a hydraulic system and a filtering and cleaning device arranged in the hydraulic system, the filtering and cleaning device comprises a mounting rack, a filter cartridge, a backwashing mechanism and a driving mechanism, that is, the filter cartridge is fixedly connected to the mounting rack, a filter screen is fixedly connected to the interior of the filter cartridge, and the backwashing mechanism is arranged on the mounting rack. A three-way valve body A and a three-way valve body B are fixedly connected to the two ends of the filter cartridge respectively, an impurity outlet pipe is fixedly connected to the portion, located on one side of the filter screen, of the filter cartridge, a two-way valve body is fixedly connected to the impurity outlet pipe, and a washing spray head piece is fixedly connected to the portion, located on the other side of the filter screen, of the filter cartridge. A liquid supply box and a piston liquid supply assembly are fixedly connected to the mounting rack, the liquid supply box is in pipeline connection with the piston liquid supply assembly, the piston liquid supply assembly is in pipeline connection with the flushing nozzle piece, a driving mechanism is arranged on the mounting rack, and the driving mechanism is in power connection with the three-way valve body A, the three-way valve body B, the two-way valve body and the piston liquid supply assembly.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems, in particular to a hydraulic system with automatic filtering and cleaning functions. Background Art

[0002] As the core power transmission and control device in modern industrial equipment, hydraulic system is widely used in engineering machinery, metallurgical equipment, ships, aerospace and other fields. The hydraulic system transmits power through the circulation of hydraulic oil. Its operating efficiency and stability directly depend on the cleanliness of the hydraulic oil. However, during long-term use, hydraulic oil will inevitably be mixed with various impurities, such as metal wear particles, dust, moisture and other pollutants. These impurities will not only accelerate the wear of hydraulic components, but also clog the filter device in the system, resulting in poor flow of hydraulic oil, a drop in system pressure, and even equipment failure. In order to maintain the cleanliness of the hydraulic oil, a filtering device is usually installed in the hydraulic system to intercept and remove impurities in the hydraulic oil. The filter will gradually become clogged after long-term use and requires regular shutdown for manual cleaning or replacement, which not only increases maintenance costs, but also leads to extended equipment downtime, affecting production efficiency. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a hydraulic system which can automatically backwash the filter without stopping the machine.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a hydraulic system with automatic filtering and cleaning, including a hydraulic system and a filtering and cleaning device arranged in the hydraulic system, the filtering and cleaning device including a mounting frame, a filter cartridge, a backwashing mechanism, and a driving mechanism, the filter cartridge is fixedly connected to the mounting frame, a filter screen is fixedly connected inside the filter cartridge, one end of the filter cartridge is fixedly connected to a port of a three-way valve body A, and the other end is fixedly connected to a port of a three-way valve body B, the three-way valve body A and one port of the three-way valve body B are respectively connected to the pipeline of the hydraulic system, and the three-way valve body A and one port of the three-way valve body B are connected through a temporary liquid supply pipe; The mounting frame is provided with the backwashing mechanism, which includes a liquid supply box, a piston liquid supply assembly, and a flushing nozzle. The filter cartridge is fixedly connected with an impurity outlet pipe on one side of the filter screen, and a two-way valve body is fixedly connected to the impurity outlet pipe. The filter cartridge is fixedly connected with the flushing nozzle on the other side of the filter screen. The mounting frame is fixedly connected with the liquid supply box and the piston liquid supply assembly, and the liquid supply box is connected to the piston liquid supply assembly pipeline, and the piston liquid supply assembly is connected to the flushing nozzle pipeline. The driving mechanism is provided on the mounting frame, and the driving mechanism is dynamically connected with the three-way valve body A, the three-way valve body B, the two-way valve body, and the piston liquid supply assembly. When the driving mechanism drives the three-way valve body A, the three-way valve body B, and the two-way valve body to switch directions for realizing backwashing, the driving mechanism can drive the piston liquid supply assembly to supply liquid to the flushing nozzle component. When the driving mechanism drives the three-way valve body A, the three-way valve body B, and the two-way valve body to switch directions for realizing oil filtering, the driving mechanism can drive the piston liquid supply assembly to draw liquid from the liquid supply tank.

[0005] In the above technical solution, the structure of the three-way valve body A is that the three-way valve body A includes a three-way valve body A, a three-way valve ball A, and a valve shaft A. The three-way valve body A is provided with the three-way valve ball A inside, and the three-way valve ball A is fixedly connected to the valve shaft A. As above, the structure of the three-way valve body B is that the three-way valve body B includes a three-way valve body B, a three-way valve ball B, and a valve shaft B. The three-way valve body B is provided with the three-way valve ball B inside, and the three-way valve ball B is fixedly connected to the valve shaft B. Furthermore, the structure of the two-way valve body is that the two-way valve body comprises a two-way valve body, a two-way valve ball and a valve shaft C, the two-way valve body is provided with the two-way valve ball inside, and the two-way valve ball is fixedly connected to the valve shaft C; The driving mechanism is dynamically connected to the valve shaft A, valve shaft B, and valve shaft C.

[0006] In the above technical solution, in order to synchronously drive the three-way valve body A, the three-way valve body B and the two-way valve body to work, the following structure is adopted: The valve shaft A is fixedly connected to the worm gear A, the valve shaft B is fixedly connected to the worm gear B, and the valve shaft C is fixedly connected to the worm gear C; The mounting frame is rotatably connected to a drive shaft A, the drive shaft A is fixedly connected to a worm A and a worm B, the worm A is meshingly connected to the worm wheel A, and the worm B is meshingly connected to the worm wheel B; The mounting frame is rotatably connected to a drive shaft B, the drive shaft B is fixedly connected to a worm C, and the worm C is meshingly connected to the worm wheel C; The drive shaft A and the drive shaft B are connected to each other through a synchronous transmission member A, and the drive mechanism is connected to the drive shaft B through power.

[0007] In the above technical solution, in order to improve the flushing effect on the filter screen, the structure of the flushing nozzle member is: The flushing nozzle component includes a nozzle and a connecting ring tube. The filter cartridge is fixedly connected to a plurality of nozzles in a ring array on one side of the filter screen. The nozzles are tilted and face the filter screen. The connecting ring tube is provided on the outside of the filter cartridge. The plurality of nozzles are fixedly connected to the connecting ring tube, and the connecting ring tube is connected to the pipeline of the piston liquid supply assembly.

[0008] In the above technical solution, the piston liquid supply assembly adopts the following structure: The piston liquid supply assembly includes a piston body, a liquid storage outer cylinder, and a piston column. The liquid storage outer cylinder is fixedly connected to the mounting frame, the piston body is arranged inside the liquid storage outer cylinder, the piston column is fixedly connected to the piston body, a liquid inlet pipe and a liquid outlet pipe are fixedly connected to the liquid storage outer cylinder, the liquid inlet pipe is connected to the liquid supply box through a pipeline A, a one-way valve A is arranged on the pipeline A, the liquid outlet pipe is connected to the connecting ring pipe through a pipeline B, a one-way valve B is arranged on the interface of the connecting ring pipe, and the piston column is dynamically connected to the driving mechanism, so that the driving mechanism can drive the piston column to perform linear motion.

[0009] In the above technical solution, the driving mechanism includes a driving motor and a linear driving module matched with the driving motor, and the linear driving module includes a driving platform capable of linear motion; In order to realize the driving mechanism to work on the three-way valve body A, the three-way valve body B and the two-way valve body, a driving shaft C is rotatably connected to the mounting frame, and the driving shaft C and the driving shaft B are dynamically connected through a synchronous transmission member B. A driving gear A is fixedly connected to the driving shaft C, and a driving rack A is fixedly connected to the driving platform. When the driving platform drives the driving rack A to move linearly, the driving rack A can mesh with the driving gear A. In order to realize the operation of the piston liquid supply assembly by the driving mechanism, a piston driving module is fixedly connected to the liquid storage outer cylinder, and the piston driving module includes a traction platform capable of linear motion, the traction platform is fixedly connected to the piston column, and the driving platform is dynamically connected to the piston driving module.

[0010] In the above technical solution, the specific structure of the piston drive module is: The piston drive module also includes a module frame, a guide column, and a lead screw B. The module frame is fixedly connected to the liquid storage outer cylinder, the guide column is fixedly connected to the module frame, the traction platform is slidably connected to the guide column, the lead screw B is threadedly connected to the traction platform, one end of the lead screw B is fixedly connected to a driving shaft E, the driving shaft E is fixedly connected to a driving gear B, the driving platform is fixedly connected to a driving rack B, and the driving platform drives the driving rack B to mesh with the driving gear B; When backwashing is performed, the drive rack A first meshes with the drive gear A. When the drive rack A is disengaged from the drive gear A, the drive rack B meshes with the drive gear B.

[0011] In the above technical solution, the specific structure of the linear drive module is: The linear drive module includes a sliding column, a lead screw A and a drive shaft D. The sliding column is fixedly connected to the mounting frame, the drive platform is slidably connected to the sliding column, the drive platform is threadedly connected to the lead screw A, the drive shaft D is fixedly connected to the lead screw A, and the drive motor is dynamically connected to the drive shaft D.

[0012] In the above technical solution, in order to realize automatic backwashing, pressure sensors are fixedly connected to both sides of the filter screen on the filter cartridge; The mounting frame is fixedly connected with a position switch in cooperation with the driving platform; It also includes a controller, and the pressure sensor, position switch and drive motor are all connected to the controller signal.

[0013] In the above technical solution, in order to ensure compatibility, the liquid supply tank stores cleaning fluid, and the cleaning fluid uses the same oil as the hydraulic oil in the hydraulic system.

[0014] Beneficial effects of the present invention: The hydraulic oil in the hydraulic system can enter the filter cartridge, and the impurities in the hydraulic oil are filtered through the filter screen in the filter cartridge. When the filter screen needs to be backwashed, the three-way valve body A, the three-way valve body B and the two-way valve body can be driven by the driving mechanism to work. At this time, the three-way valve body A and the three-way valve body B change the flow path of the hydraulic oil, that is, the hydraulic oil does not pass through the filter cartridge, and the hydraulic oil is transported through the temporary liquid supply pipe. In this way, the filter screen can be backwashed without affecting the normal operation of the hydraulic system, avoiding shutdown and affecting production efficiency. When the hydraulic oil flow path is changed, the two-way valve body opens the impurity outlet pipe, and the driving mechanism can drive the piston liquid supply assembly to work, so that the piston liquid supply assembly supplies the internal flushing liquid to the flushing nozzle component, and the cleaning liquid is sprayed to the filter screen through the flushing nozzle component, thereby flushing the filter screen, and the impurities flushed can be discharged through the impurity outlet pipe; In summary, through the above structure, the hydraulic oil can be filtered to ensure the normal operation of the hydraulic system, and the filter can also be backwashed to avoid clogging of the filter and affect the normal delivery of the hydraulic oil. In addition, a driving mechanism is used to drive the three-way valve body A, three-way valve body B, two-way valve body and piston liquid supply assembly to achieve the path switching and liquid supply required for backwashing, thereby automatically realizing the backwashing work to reduce manpower, speed up production efficiency, and ensure that the structure of the filtering and cleaning device is more stable and reduces failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 This is a structural schematic diagram of the present invention from another angle; Figure 4 It is a structural schematic diagram of the backwashing mechanism in the present invention; Figure 5 It is a schematic diagram of the power connection structure between the three-way valve body A, the three-way valve body B and the two-way valve body in the present invention; Figure 6 This is a schematic diagram of the external structure of the filter cartridge in the present invention; Figure 7 This is a schematic diagram of the internal structure of the filter cartridge in the present invention; Figure 8 It is a structural schematic diagram of the piston drive module in the present invention; Fig. 9 It is a structural schematic diagram of the piston liquid supply assembly in the present invention; Fig.10 It is a structural schematic diagram of the driving mechanism in the present invention.

[0016] In the figure: 100 mounting rack; 200 filter cartridge, 201 filter screen; 300 backwashing mechanism, 301 liquid supply box, 302 piston liquid supply assembly, 3021 piston body, 3022 liquid storage outer cylinder, 3023 piston column, 3024 liquid inlet pipe, 3025 liquid outlet pipe, 303 flushing nozzle, 3031 nozzle, 3032 connecting ring pipe, 304 impurity outlet pipe, 305 two-way valve body, 3051 two-way valve body, 3052 valve shaft C, 3053 worm gear C, 306 pipeline A, 307 check valve A, 308 pipeline B, 309 check valve B, 310 piston drive module, 3101 traction platform, 3102 module frame, 3103 guide column, 3104 screw B; 400 driving mechanism, 401 driving motor, 402 linear driving module, 4021 driving platform, 4022 sliding column, 4023 lead screw A, 4024 driving shaft D, 403 driving shaft A, 404 worm A, 405 worm B, 406 driving shaft B, 407 worm C, 408 synchronous transmission member A, 409 driving shaft C, 410 synchronous transmission member B, 411 driving gear A, 412 driving rack A, 413 driving shaft E, 414 driving gear B, 415 driving rack B; 500 three-way valve body A, 501 three-way valve body A, 502 valve shaft A, 503 worm gear A; 600 three-way valve body B, 601 three-way valve body B, 602 valve shaft B, 603 worm gear B; 700 temporary liquid supply pipe; 800 pressure sensor. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 3 A hydraulic system with automatic filtering and cleaning includes a hydraulic system and a filtering and cleaning device arranged in the hydraulic system. In an embodiment, the filtering and cleaning device includes a mounting frame 100, a filter cartridge 200, a backwashing mechanism 300, and a driving mechanism 400. First, please refer to Figure 1 , Figure 7 , a filter cartridge 200 is fixedly connected to the mounting frame 100, a filter screen 201 is fixedly connected inside the filter cartridge 200, one end of the filter cartridge 200 is fixedly connected to a port of a three-way valve body A500, and the other end is fixedly connected to a port of a three-way valve body B600, one port of the three-way valve body A500 and one port of the three-way valve body B600 are respectively connected to the pipeline of the hydraulic system, and the three-way valve body A500 and one port of the three-way valve body B600 are connected through a temporary liquid supply pipe 700, so that the hydraulic oil in the hydraulic system can enter the inside of the filter cartridge 200, and the impurities in the hydraulic oil are filtered through the filter screen 201, and when the filter screen 201 needs to be cleaned, the flow path of the hydraulic oil can be switched through the three-way valve body A500 and the three-way valve body B600, that is, the hydraulic oil does not pass through the filter cartridge 200, and the hydraulic oil is transported through the temporary liquid supply pipe 700; Further, see Figure 5In the embodiment, the three-way valve body A500 includes a three-way valve body A501, a three-way valve ball A, and a valve shaft A502. The three-way valve body A501 is provided with a three-way valve ball A inside, and the three-way valve ball A is fixedly connected to the valve shaft A502. Similarly, the three-way valve body B600 includes a three-way valve body B601, a three-way valve ball B, and a valve shaft B602. The three-way valve body B601 is provided with a three-way valve ball B inside, and the three-way valve ball B is fixedly connected to the valve shaft B602. In this way, the flow paths of the three-way valve bodies A500 and B600 can be adjusted by rotating the valve shaft A502 and the valve shaft B602. The specific structure is the prior art, so it is not described here.

[0019] Furthermore, please refer to Figure 1 , Figure 5-Figure 7 A backwashing mechanism 300 for backwashing the filter screen 201 is provided on the mounting frame 100. Specifically, the backwashing mechanism 300 includes a liquid supply box 301, a piston liquid supply assembly 302, and a flushing nozzle 303. That is, an impurity outlet pipe 304 is fixedly connected to one side (upstream side) of the filter screen 201 on the filter cartridge 200, and a two-way valve body 305 is fixedly connected to the impurity outlet pipe 304. The two-way valve body 305 includes a two-way valve body 3051, a two-way valve ball and a valve shaft C3052. That is, a two-way valve ball is provided inside the two-way valve body 3051, and a valve shaft C3052 is fixedly connected to the two-way valve ball. In this way, the impurity outlet pipe 304 can be opened and closed by rotating the valve shaft C3052. Closed, a flushing nozzle 303 is fixedly connected to the filter cartridge 200 on the other side (downstream side) of the filter screen 201, a liquid supply box 301 and a piston liquid supply assembly 302 are fixedly connected to the mounting frame 100, the liquid supply box 301 is connected to the piston liquid supply assembly 302 by pipeline, and the piston liquid supply assembly 302 is connected to the flushing nozzle 303 by pipeline, wherein the liquid supply box 301 stores cleaning fluid, and the cleaning fluid uses the same oil as the hydraulic oil in the hydraulic system, so that after the filter screen 201 is cleaned by the cleaning fluid, the cleaning fluid retained in the filter cartridge 200 is compatible with the subsequent liquid oil, thereby avoiding damage to the hydraulic system or performance degradation due to incompatibility between different liquids; Furthermore, the flushing nozzle component 303 includes a nozzle 3031 and a connecting ring pipe 3032, that is, a plurality of nozzles 3031 are fixedly connected in a ring array on the filter cartridge 200 and located on one side of the filter screen 201, the nozzles 3031 are tilted and face the filter screen 201, and a connecting ring pipe 3032 is provided on the outside of the filter cartridge 200, and the plurality of nozzles 3031 are fixedly connected to the connecting ring pipe 3032, and the connecting ring pipe 3032 is connected to the piston liquid supply assembly 302 pipeline, so that when the cleaning liquid is transported to the flushing nozzle component 303, the cleaning liquid can directly flush the filter screen 201, thereby improving the cleaning effect of the filter screen 201; Further, see Figure 4 , Figure 8 , Fig. 9 The piston liquid supply assembly 302 includes a piston body 3021, a liquid storage outer cylinder 3022, and a piston column 3023. The mounting frame 100 is fixedly connected with the liquid storage outer cylinder 3022, and the piston body 3021 is provided inside the liquid storage outer cylinder 3022. The piston column 3023 is fixedly connected to the piston body 3021. The liquid storage outer cylinder 3022 is fixedly connected with a liquid inlet pipe 3024 and a liquid outlet pipe 3025. The liquid inlet pipe 3024 is connected to the liquid supply box 301 through a pipeline A306. The pipeline A306 is provided with a one-way valve A307. The liquid outlet pipe 3025 is connected to the liquid supply box 301. The annular tube 3032 is connected via a pipeline B308, and a one-way valve B309 is provided on the interface portion connecting the annular tube 3032. Under the action of the one-way valve A307 and the one-way valve B309, when the piston column 3023 drives the piston body 3021 to move outward, the cleaning liquid in the liquid supply box 301 can be drawn into the liquid storage outer cylinder 3022; when the piston column 3023 drives the piston body 3021 to move inward, the cleaning liquid inside the liquid storage outer cylinder 3022 can be pushed to the flushing nozzle component 303, thereby flushing the filter screen 201 through the flushing nozzle component 303.

[0020] Also, see Figure 2 A driving mechanism 400 is also provided on the mounting frame 100, and the driving mechanism 400 provides power for the entire filtering and cleaning device. The driving mechanism 400 here includes a driving motor 401 and a linear driving module 402 that cooperates with the driving motor 401, wherein, please refer to Fig.10 , the linear drive module 402 includes a drive platform 4021, a sliding column 4022, a lead screw A4023 and a drive shaft D4024, that is, a sliding column 4022 is fixedly connected to the mounting frame 100, the driving platform 4021 is slidably connected to the sliding column 4022, the lead screw A4023 is threadedly connected to the driving platform 4021, the lead screw A4023 is fixedly connected to the drive shaft D4024, and the driving motor 401 is dynamically connected to the driving shaft D4024, so that the lead screw A4023 can be driven to rotate by the driving motor 401, so that the driving platform 4021 can perform linear motion on the sliding column 4022; Also, see Figure 5, through the above-mentioned driving mechanism 400, power can be provided for the three-way valve body A500, the three-way valve body B600, and the two-way valve body 305. Specifically, a worm gear A503 is fixedly connected to the valve shaft A502, a worm gear B603 is fixedly connected to the valve shaft B602, and a worm gear C3053 is fixedly connected to the valve shaft C3052. A drive shaft A403 is rotatably connected to the mounting frame 100, a worm A404 and a worm B405 are fixedly connected to the drive shaft A403, the worm A404 is meshingly connected to the worm gear A503, and the worm B405 is meshingly connected to the worm gear B603. Furthermore, a drive shaft B406 is rotatably connected to the mounting frame 100, a worm C407 is fixedly connected to the drive shaft B406, and the worm C407 is meshingly connected to the worm gear C3053; The driving shaft A403 and the driving shaft B406 are connected to each other by a synchronous transmission member A408. The mounting frame 100 is also rotatably connected to a driving shaft C409. The driving shaft C409 and the driving shaft B406 are connected to each other by a synchronous transmission member B410. The driving shaft C409 is fixedly connected to a driving gear A411. The driving platform 4021 is fixedly connected to a driving rack A412. When the driving platform 4021 drives the driving rack A412 to move linearly, the driving rack A412 can move with the driving gear A411. When the driving rack A412 drives the driving gear A411 to rotate, the power can be transmitted to the worm A404, the worm B405, and the worm C407, and then the power is transmitted to the worm wheel A503, the worm wheel B603, and the worm wheel C3053, and finally the valve shaft A502, the valve shaft B602, and the valve shaft C3052 rotate, so that the three-way valve body A500 and the three-way valve body B600 switch the flow path, and the two-way valve body 305 opens the impurity outlet pipe 304, and the self-locking effect of the worm and the worm wheel can ensure the stability of the valve body.

[0021] Also, see Figure 1 , Figure 8 , Fig. 9In order to realize the operation of the piston liquid supply assembly 302 by the driving mechanism 400, a piston driving module 310 is fixedly connected to the liquid storage outer cylinder 3022, and the piston driving module 310 includes a traction platform 3101, a module frame 3102, a guide column 3103, and a lead screw B3104. That is, the liquid storage outer cylinder 3022 is fixedly connected to the module frame 3102, the module frame 3102 is fixedly connected to the guide column 3103, the traction platform 3101 is slidably connected to the guide column 3103, the traction platform 3101 is threadedly connected to the lead screw B3104, and the traction platform 3101 and the piston column 3023 are connected to each other. Fixed connection, one end of the lead screw B3104 is fixedly connected to a driving shaft E413, a driving gear B414 is fixedly connected to the driving shaft E413, and a driving rack B415 is also fixedly connected to the driving platform 4021. The driving platform 4021 drives the driving rack B415 to mesh with the driving gear B414, so that when the driving rack B415 drives the driving gear B414 to rotate, the lead screw B3104 can rotate, so that the traction platform 3101 can perform linear motion on the guide column 3103, and the traction platform 3101 can drive the piston column 3023 to perform linear motion; The driving mechanism 400 can drive the three-way valve body A500, the three-way valve body B600, the two-way valve body 305 and the piston liquid supply assembly 302 to work, so that when the driving mechanism 400 drives the three-way valve body A500, the three-way valve body B600, and the two-way valve body 305 to switch to realize the backwashing work, the driving mechanism 400 can drive the piston liquid supply assembly 302 to supply liquid to the flushing nozzle part 303, and the driving mechanism 400 drives the three-way valve body A500, the three-way valve body B600, and the two-way valve body 305 to realize the oil filtration work. During the reversal, the driving mechanism 400 can drive the piston liquid supply assembly 302 to draw liquid from the liquid supply box 301, and when the backwashing operation is realized, the driving rack A412 is first meshed with the driving gear A411, and when the driving rack A412 is disengaged from the driving gear A411, the driving rack B415 is meshed with the driving gear B414, that is, the flow paths of the three-way valve body A500 and the three-way valve body B600 and the opening and closing of the two-way valve body 305 are first switched, and then the supply of cleaning liquid is realized to meet the normal needs of the backwashing operation; For further optimization, see Figure 6In order to realize automatic backwashing, pressure sensors 800 are fixedly connected on both sides of the filter screen 201 on the filter cartridge 200, and a position switch is fixedly connected on the mounting frame 100 to cooperate with the driving platform 4021. The position switch can detect the movement position of the driving platform 4021. In addition, a controller is also included. The pressure sensor 800, the position switch and the driving motor 401 are all connected to the controller signal. In this way, the pressure difference change on both sides of the filter screen 201 can be detected by the pressure sensor 800, and then it is determined whether the filter element needs to be cleaned. When cleaning is required, the controller controls the driving motor 401 to work, which makes the driving mechanism 400 work to complete the following work flow: See also Figure 1-Figure 10 , the driving motor 401 drives the lead screw A4023 to rotate, so that the driving platform 4021 drives the driving rack A412 to move linearly, and the driving rack A412 drives the driving gear A411 to rotate, and then the power of the driving gear A411 is transmitted to the worm A404, the worm B405, and the worm C407, and then the power is transmitted to the worm wheel A503, the worm wheel B603, and the worm wheel C3053, and finally the valve shaft A502, the valve shaft B602, and the valve shaft C3052 are rotated, so that the three-way valve body A500 and the three-way valve body B600 switch the flow path (the hydraulic oil does not pass through the filter cartridge 200, and the hydraulic oil is transported through the temporary liquid supply pipe 700), and the two-way valve body 305 opens the impurity outlet pipe 304; When the driving platform 4021 continues to move, the driving platform 4021 can drive the driving rack B415 to drive the driving gear B414 to rotate, so that the lead screw B3104 rotates. At this time, the traction platform 3101 drives the piston column 3023 to move, so that the piston column 3023 drives the piston body 3021 to move inward, so that the piston body 3021 can push the cleaning liquid inside the liquid storage outer cylinder 3022, so that the cleaning liquid can be pushed to each group of nozzles 3031, and the cleaning liquid is sprayed to the filter 201 through the nozzles 3031, so as to rinse the filter 201, and the impurities after rinsing are discharged from the impurity outlet pipe 304 together with the cleaning liquid; When the cleaning is completed (the driving platform 4021 contacts the position switch), the driving motor 401 rotates in the reverse direction. At this time, the driving platform 4021 moves in the reverse direction. As above, the driving rack B415 drives the driving gear B414 to rotate. In addition, the traction platform 3101 drives the piston column 3023 and the piston body 3021 to move outward, so that the cleaning liquid stored in the liquid supply box 301 can be extracted into the liquid storage outer cylinder 3022 for the next cleaning work. When the driving platform 4021 continues to move, the driving rack A412 can drive the driving gear A411 to rotate. As above, the three-way valve body A500 and the three-way valve body B600 can switch the flow path (the hydraulic oil passes through the filter cylinder 200, and the hydraulic oil is no longer transported through the temporary liquid supply pipe 700), and the two-way valve body 305 closes the impurity outlet pipe 304; When the driving platform 4021 moves to the contact position switch, the driving motor 401 stops and the cleaning work is completed.

[0022] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hydraulic system with automatic filtering and cleaning, comprising a hydraulic system and a filtering and cleaning device arranged in the hydraulic system, characterized in that: The filtering and cleaning device comprises a mounting frame (100), a filter cartridge (200), a backwashing mechanism (300), and a driving mechanism (400); the filter cartridge (200) is fixedly connected to the mounting frame (100); a filter screen (201) is fixedly connected inside the filter cartridge (200); one end of the filter cartridge (200) is fixedly connected to a port of a three-way valve body A (500); and the other end of the filter cartridge (200) is fixedly connected to a port of a three-way valve body B (600); one port of the three-way valve body A (500) and one port of the three-way valve body B (600) are respectively connected to a pipeline of a hydraulic system; and one port of the three-way valve body A (500) and one port of the three-way valve body B (600) are connected via a temporary liquid supply pipe (700); The mounting frame (100) is provided with the backwashing mechanism (300), the backwashing mechanism (300) comprising a liquid supply box (301), a piston liquid supply assembly (302), and a flushing nozzle (303); an impurity outlet pipe (304) is fixedly connected to one side of the filter screen (201) on the filter cartridge (200); a two-way valve body (305) is fixedly connected to the impurity outlet pipe (304); the flushing nozzle (303) is fixedly connected to the other side of the filter screen (201) on the filter cartridge (200); the liquid supply box (301) and the piston liquid supply assembly (302) are fixedly connected to the mounting frame (100); the liquid supply box (301) is connected to the piston liquid supply assembly (302) via a pipeline; and the piston liquid supply assembly (302) is connected to the flushing nozzle (303) via a pipeline; The drive mechanism (400) is provided on the mounting frame (100), and the drive mechanism (400) is dynamically connected to the three-way valve body A (500), the three-way valve body B (600), the two-way valve body (305), and the piston liquid supply assembly (302).

2. A hydraulic system with automatic filtering and cleaning according to claim 1, characterized in that: The three-way valve body A (500) comprises a three-way valve body A (501), a three-way valve ball A, and a valve shaft A (502); the three-way valve ball A is arranged inside the three-way valve body A (501), and the valve shaft A (502) is fixedly connected to the three-way valve ball A; The three-way valve body B (600) comprises a three-way valve body B (601), a three-way valve ball B, and a valve shaft B (602); the three-way valve ball B is arranged inside the three-way valve body B (601), and the valve shaft B (602) is fixedly connected to the three-way valve ball B; The two-way valve body (305) comprises a two-way valve body (3051), a two-way valve ball and a valve shaft C (3052); the two-way valve ball is arranged inside the two-way valve body (3051), and the valve shaft C (3052) is fixedly connected to the two-way valve ball; The driving mechanism (400) is dynamically connected to the valve shaft A (502), the valve shaft B (602), and the valve shaft C (3052).

3. A hydraulic system with automatic filtering and cleaning according to claim 2, characterized in that: The valve shaft A (502) is fixedly connected to a worm gear A (503), the valve shaft B (602) is fixedly connected to a worm gear B (603), and the valve shaft C (3052) is fixedly connected to a worm gear C (3053); The mounting frame (100) is rotatably connected to a drive shaft A (403), the drive shaft A (403) is fixedly connected to a worm A (404) and a worm B (405), the worm A (404) is meshingly connected to the worm wheel A (503), and the worm B (405) is meshingly connected to the worm wheel B (603); A drive shaft B (406) is rotatably connected to the mounting frame (100), a worm C (407) is fixedly connected to the drive shaft B (406), and the worm C (407) is meshingly connected to the worm wheel C (3053); The drive shaft A (403) and the drive shaft B (406) are dynamically connected via a synchronous transmission member A (408), and the drive mechanism (400) is dynamically connected to the drive shaft B (406).

4. A hydraulic system with automatic filtering and cleaning according to claim 3, characterized in that: The flushing nozzle component (303) comprises a nozzle (3031) and a connecting ring tube (3032); a plurality of groups of nozzles (3031) are fixedly connected in a ring array on the filter cartridge (200) and located on one side of the filter screen (201); the nozzles (3031) are arranged obliquely and face the filter screen (201); the connecting ring tube (3032) is arranged outside the filter cartridge (200); the plurality of groups of nozzles (3031) are fixedly connected to the connecting ring tube (3032); and the connecting ring tube (3032) is connected to a pipeline of the piston liquid supply assembly (302).

5. A hydraulic system with automatic filtering and cleaning according to claim 4, characterized in that: The piston liquid supply assembly (302) comprises a piston body (3021), a liquid storage outer cylinder (3022), and a piston rod (3023); the liquid storage outer cylinder (3022) is fixedly connected to the mounting frame (100); the piston body (3021) is arranged inside the liquid storage outer cylinder (3022); the piston rod (3023) is fixedly connected to the piston body (3021); the liquid storage outer cylinder (3022) is fixedly connected to a liquid inlet pipe (3024) and a liquid outlet pipe (3025); the liquid inlet pipe (3024) and the liquid outlet pipe (3025) are fixedly connected to each other; 24) is connected to the liquid supply box (301) via a pipeline A (306), a one-way valve A (307) is provided on the pipeline A (306), the liquid outlet pipe (3025) is connected to the connecting ring pipe (3032) via a pipeline B (308), a one-way valve B (309) is provided on the interface of the connecting ring pipe (3032), and the piston column (3023) is dynamically connected to the driving mechanism (400), so that the driving mechanism (400) can drive the piston column (3023) to perform linear motion.

6. A hydraulic system with automatic filtering and cleaning according to claim 5, characterized in that: The driving mechanism (400) comprises a driving motor (401) and a linear driving module (402) cooperating with the driving motor (401), wherein the linear driving module (402) comprises a driving platform (4021) capable of performing linear motion; A drive shaft C (409) is rotatably connected to the mounting frame (100), and a power connection is achieved between the drive shaft C (409) and the drive shaft B (406) via a synchronous transmission member B (410). A drive gear A (411) is fixedly connected to the drive shaft C (409), and a drive rack A (412) is fixedly connected to the drive platform (4021). When the drive platform (4021) drives the drive rack A (412) to move linearly, the drive rack A (412) can mesh with the drive gear A (411); The liquid storage outer cylinder (3022) is fixedly connected to a piston drive module (310), wherein the piston drive module (310) comprises a traction platform (3101) capable of linear motion, the traction platform (3101) is fixedly connected to the piston column (3023), and the drive platform (4021) is dynamically connected to the piston drive module (310).

7. A hydraulic system with automatic filtering and cleaning according to claim 6, characterized in that: The piston drive module (310) further comprises a module frame (3102), a guide column (3103), and a lead screw B (3104); the module frame (3102) is fixedly connected to the liquid storage outer cylinder (3022); the guide column (3103) is fixedly connected to the module frame (3102); the traction platform (3101) is slidably connected to the guide column (3103); the lead screw B (3104) is threadedly connected to the traction platform (3101); one end of the lead screw B (3104) is fixedly connected to a drive shaft E (413); a drive gear B (414) is fixedly connected to the drive shaft E (413); a drive rack B (415) is fixedly connected to the drive platform (4021); the drive platform (4021) drives the drive rack B (415) to mesh with the drive gear B (414); When backwashing is performed, the driving rack A (412) first meshes with the driving gear A (411), and when the driving rack A (412) is disengaged from the driving gear A (411), the driving rack B (415) meshes with the driving gear B (414).

8. The hydraulic system with automatic filtering and cleaning according to claim 6, characterized in that: The linear drive module (402) comprises a sliding column (4022), a lead screw A (4023) and a drive shaft D (4024); the sliding column (4022) is fixedly connected to the mounting frame (100); the driving platform (4021) is slidably connected to the sliding column (4022); the drive platform (4021) is threadedly connected to the lead screw A (4023); the drive shaft D (4024) is fixedly connected to the lead screw A (4023); and the drive motor (401) is dynamically connected to the drive shaft D (4024).

9. The hydraulic system with automatic filtering and cleaning according to claim 6, characterized in that: Pressure sensors (800) are fixedly connected to both sides of the filter screen (201) on the filter cartridge (200); A position switch is fixedly connected to the mounting frame (100) in cooperation with the driving platform (4021); It also includes a controller, and the pressure sensor (800), the position switch and the drive motor (401) are all connected to the controller signal.

10. The hydraulic system with automatic filtering and cleaning according to claim 1, characterized in that: The liquid supply tank (301) stores cleaning fluid, and the cleaning fluid uses the same oil as the hydraulic oil in the hydraulic system.

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