Front filtering structure of hydraulic pump

Abstract

The invention relates to the technical field of mechanical equipment, and discloses a hydraulic pump front filtering structure which comprises a supporting mechanism, a filtering mechanism and an auxiliary mechanism, the supporting mechanism comprises a first supporting frame, the outer wall of the bottom of the first supporting frame is fixedly sleeved with a fixing ring, and the outer wall of the bottom of the fixing ring is fixedly connected with supporting legs; a water inlet pipe is fixedly connected to the outer wall of the first supporting frame, a groove is formed in the inner wall of the bottom of the first supporting frame, and a first protruding point is fixedly connected to the inner wall of the side, close to the groove, of the first supporting frame. When the hydraulic pump works, the auxiliary mechanism can clean solid particle pollutants adsorbed on the filter plate, so that the filter plate can be prevented from being blocked, the pressure difference between the front part and the rear part of the filter is reduced, the working blockage of the hydraulic pump caused by the pressure difference problem is avoided, the normal operation of the hydraulic pump is ensured, and the stable operation of the whole hydraulic system is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and particularly to a pre-filter structure for a hydraulic pump. Background Art

[0002] The pre-filter of the hydraulic pump is used to block solid particle pollutants in the liquid, prevent these pollutants from entering the hydraulic pump, so that the moving parts of the hydraulic pump will not be worn or jammed due to the pollutants, and thus ensure the normal operation of the hydraulic pump.

[0003] The patent application with the application number CN201821824672.4 discloses a filtering structure that filters the liquid through a double-layer filtering structure and cleans the mesh cylinder through a scraper during the filtering process. The structure is simple, convenient and practical, can prevent the mesh cylinder from being blocked during the filtering process, improve the extraction efficiency, the bottom plate is placed at the bottom end of the outer mesh cylinder, a ring-shaped groove is opened on the outer circle of the bottom plate, the sealing ring is placed in the ring-shaped groove and fits with the bottom end of the outer mesh cylinder, and the main cover plate is placed at the top end of the outer mesh cylinder.

[0004] To sum up, when the pre-filter device of the hydraulic pump filters solid particle pollutants in the liquid, it may occur that the solid particle pollutants are adsorbed on the filter screen. Once this blockage phenomenon occurs, a large pressure drop will be generated in the filter, and then a significant pressure difference will be formed before and after the filter. This pressure difference will hinder the operation of the hydraulic pump and cannot ensure the normal operation of the hydraulic pump.

[0005] Therefore, we propose a pre-filter structure for a hydraulic pump. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a pre-filter structure for a hydraulic pump to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A pre-filter structure for a hydraulic pump, including a support mechanism and an auxiliary mechanism. The support mechanism includes a first support frame. A fixed ring is fixedly sleeved on the outer wall of the bottom of the first support frame. A support foot is fixedly connected to the outer wall of the bottom of the fixed ring. A water inlet pipe is fixedly connected to the outer wall of the first support frame. A groove is opened on the inner wall of the bottom of the first support frame. A first bump is fixedly connected to the inner wall of the first support frame close to the groove. A first fixing frame is slidably connected to the inner wall of the top of the first support frame. A sewage pipe is fixedly connected to the outer wall of the bottom of the first support frame. A first connecting rod is fixedly sleeved on the outer wall of the end of the sewage pipe away from the first support frame. The end of the first connecting rod away from the sewage pipe is fixedly connected to the fixed ring. The auxiliary mechanism includes: The sliding frame is slidably connected to the inner wall of the first support frame. An airbag is fixedly connected to the inner wall of the sliding frame. A connecting block is fixedly connected to the inner wall of the sliding frame. The number of the connecting blocks is four, and the four connecting blocks are symmetrically arranged with the central axis of the sliding frame as the center. The outer wall of one side of the connecting block away from the sliding frame is rotatably connected to a rotating rod through a rotating shaft. A fixing plate is fixedly connected to the inner wall of the rotating rod. One end of the rotating rod away from the connecting block is provided with a sliding ring, and the inner wall of the top of the sliding ring is rotatably connected to the rotating rod through a rotating shaft. A first brush hair is fixedly connected to the inner wall of the rotating rod.

[0008] According to the above technical solution, an elastic component is fixedly connected to the outer wall of the top of the first fixing frame. One end of the elastic component away from the first fixing frame is fixedly connected to a fixing shaft. The outer surface of the fixing shaft is slidably connected to the inner wall of the first fixing frame. The number of the elastic components is four, and the four elastic components are symmetrically arranged with the central axis of the first fixing frame as the center.

[0009] According to the above technical solution, the inner wall of the connecting block is slidably connected to the outer surface of the fixing shaft. A first spring is fixedly connected to the outer wall of one side of the connecting block away from the sliding frame. One end of the first spring away from the sliding frame is fixedly connected to the bottom of the fixing shaft. The first spring is movably sleeved on the outer surface of the fixing shaft. The first spring is used to offset the overall weight of the sliding frame, so that the sliding frame can slide up and down through the airbag.

[0010] According to the above technical solution, a roller is rotatably connected to the bottom of the sliding ring through a rotating shaft. The roller is rotatably connected to the inner wall of the groove. A second connecting rod is fixedly connected to the inner wall of the sliding ring. A second convex point is fixedly connected to the outer wall of one side of the second connecting rod away from the sliding ring. The second convex point is slidably connected to the first convex point. When the second convex point contacts the first convex point, a certain vibration is generated on the sliding ring, so that the rotating rod can more effectively clean the solid particle pollutants on the outer wall of the sliding frame.

[0011] According to the above technical solution, a third fixing frame is fixedly connected to the inner wall of the sliding ring. A second brush hair is fixedly connected to the outer wall of one side of the third fixing frame away from the sliding ring. A scraping plate is fixedly connected to the inner wall of one side of the third fixing frame away from the second brush hair. The second brush hair is used to clean the bottom of the first support frame. The scraping plate is used to scrape the solid particle pollutants at the bottom of the first support frame into the sewage discharge pipe.

[0012] According to the above technical solution, a support block is fixedly connected to the inner wall of the fixed plate. A connecting frame is arranged outside the support block. A connecting shaft is fixedly connected to the outer wall of the side of the connecting frame close to the support block. One end of the connecting shaft away from the support block penetrates through the support block and is fixedly connected to a second spring. One end of the second spring close to the connecting frame is fixedly connected to the support block. A ball is rotatably connected to the inner wall of the connecting frame.

[0013] According to the above technical solution, the filtering mechanism includes a second support frame fixedly connected to the first support frame. A water outlet pipe is fixedly connected to the outer wall of the top of the second support frame. A second fixing frame is fixedly connected to the inner wall of the second support frame. An inclined plate is fixedly connected to the inner wall of the second fixing frame. The inclined plate is arranged in a shape of an annular funnel to improve the efficiency of liquid discharge.

[0014] According to the above technical solution, a filter plate is fixedly connected to the outer wall of the bottom of the second support frame. Through holes are formed in the outer wall of the filter plate. The filter plate filters solid particle pollutants in the liquid through the through holes.

[0015] Compared with the prior art, the present invention provides a pre-filtering structure for a hydraulic pump, having the following beneficial effects: 1. By providing a pre-filtering structure for a hydraulic pump in the present invention, when the pre-filtering device of the hydraulic pump filters solid particle pollutants in the liquid, the auxiliary mechanism will clean the solid particle pollutants adsorbed on the filter plate, which can prevent the filter plate from being blocked, thereby reducing the pressure difference before and after the filter, avoiding the obstruction of the hydraulic pump due to the pressure difference problem, and ensuring the normal operation of the hydraulic pump and maintaining the stable operation of the entire hydraulic system.

[0016] 2. By providing an auxiliary mechanism in the present invention, after the solid particle pollutants in the liquid are filtered by the filter plate, with the help of the inclined plate fixedly connected to the inner wall of the second fixing frame, the filtered liquid can converge and flow to the hydraulic pump more efficiently, thus providing guarantee for the normal operation of the hydraulic pump, maintaining the stable operation of the entire hydraulic system, and avoiding system failures caused by problems such as unsmooth liquid transportation.

[0017] 3. By providing an auxiliary mechanism in the present invention, when the liquid rises inside the first support frame, the airbag will drive the sliding frame to move upward. The water inlet pipe pushes the fixed plate through the injected liquid, causing the roller to drive the sliding ring to rotate, and thus pushing the sliding frame through the rotating rod. During this process, the first brush bristles fixedly connected to the outer wall of the rotating rod will clean the outer wall of the filter plate, thereby preventing the filter plate from being blocked.

[0018] 4. In the present invention, by providing a sliding ring, the second bristles play a role in cleaning the bottom of the first support frame. At the same time, the scraper can scrape the solid particle pollutants at the bottom of the first support frame into the sewage pipe. When the sliding frame drives the sliding ring to rotate through the rotating rod, the second bump will contact the first bump, and this contact will cause the sliding ring to vibrate, thereby making the rotating rod more efficient in cleaning the solid particle pollutants on the outer wall of the sliding frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic front view of the overall structure of the present invention; Figure 2 is a schematic cross-sectional view of the support mechanism of the present invention; Figure 3 is a schematic view of the support mechanism of the present invention; Figure 4 is a schematic view of the filtering mechanism of the present invention; Figure 5 is a schematic view of the auxiliary mechanism of the present invention; Figure 6 is a schematic view of the sliding frame of the present invention; Figure 7 is a schematic view of the sliding ring of the present invention; Figure 8 of the present invention Figure 2 is an enlarged schematic view of A in

[0020] In the figure: 1, support mechanism; 101, first support frame; 102, fixed ring; 103, support feet; 104, groove; 105, sewage pipe; 106, first connecting rod; 107, first bump; 108, first fixing frame; 109, elastic component; 110, fixed shaft; 111, water inlet pipe; 2, filtering mechanism; 201, second support frame; 202, filter plate; 203, through hole; 204, water outlet pipe; 205, second fixing frame; 206, inclined plate; 3, auxiliary mechanism; 301, sliding frame; 302, connecting block; 303, first spring; 304, airbag; 305, rotating rod; 306, first bristles; 307, sliding ring; 308, roller; 309, second connecting rod; 310, second bump; 311, third fixing frame; 312, second bristles; 313, scraper; 314, fixing plate; 315, support block; 316, connecting shaft; 317, connecting frame; 318, ball; 319, second spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0023] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Embodiment 1: Refer to Figures 1 - 8 , the present invention provides a technical solution: a pre-filter structure for a hydraulic pump, including a support mechanism 1 and an auxiliary mechanism 3. The support mechanism 1 includes a first support frame 101. A fixing ring 102 is fixedly sleeved on the outer wall of the bottom of the first support frame 101. A support foot 103 is fixedly connected to the outer wall of the bottom of the fixing ring 102. A water inlet pipe 111 is fixedly connected to the outer wall of the first support frame 101. The water inlet pipe 111 is used to inject liquid into the first support frame 101. A groove 104 is opened on the inner wall of the bottom of the first support frame 101. A first bump 107 is fixedly connected to the inner wall of the first support frame 101 near the groove 104. The first bump 107 is set to be semi-circular. A first fixing frame 108 is slidably connected to the inner wall of the top of the first support frame 101. A sewage pipe 105 is fixedly connected to the outer wall of the bottom of the first support frame 101. The sewage pipe 105 is used to discharge solid particle pollutants in the liquid. A first connecting rod 106 is fixedly sleeved on the outer wall of the end of the sewage pipe 105 away from the first support frame 101. The first connecting rod plays a certain auxiliary fixing role for the sewage pipe. One end of the first connecting rod 106 away from the sewage pipe 105 is fixedly connected to the fixing ring 102. When filtering operation needs to be carried out, the liquid is injected into the first support frame 101 through the water inlet pipe 111, and then the filtering mechanism 2 and the auxiliary mechanism 3 are used to filter the solid particles in the liquid. After the filtering is completed, the solid particles slide to the side of the sewage pipe 105 under the action of gravity, and finally these filtered solid particles are discharged from the first support frame 101 through the sewage pipe 105. It also includes: Slide carriage 301,The sliding frame 301 is slidably connected to the inner wall of the first support frame 101, and the inner wall of the sliding frame 301 is fixedly connected with an air bag 304, and the inner wall of the sliding frame 301 is fixedly connected with a connecting block 302. The number of the connecting blocks 302 is four, and the four connecting blocks 302 are symmetrically arranged with the central axis of the sliding frame 301 as the center. The inner wall of the connecting block 302 on the side away from the sliding frame 301 is rotatably connected with a rotating rod 305 through a rotating shaft, and the inner wall of the rotating rod 305 is fixedly connected with a fixed plate 314. A sliding ring 307 is provided at one end of the rotating rod 305 away from the connecting block 302, and the top inner wall of the sliding ring 307 is rotatably connected to the rotating rod 305 through a rotating shaft. The inner wall of the rotating rod 305 is fixedly connected with a first bristle 306, and when the rotating rod 305 is close to the filter plate 20 2, the first brush bristles 306 are made of nylon. Nylon has excellent chemical stability and is not easy to react chemically with common components in hydraulic oil. Its surface is smooth and can effectively prevent impurities from firmly adhering. In addition, the nylon bristles have a certain degree of flexibility. When contacting impurities in the hydraulic oil, it is not easy for impurities to be embedded in the bristles like rigid materials, thereby effectively removing impurities on the outer surface of the filter plate 202. Through vibration, the contact state between the impurities and the attached objects can be continuously changed, and the adhesion can be weakened, so that the impurities can be more easily separated from the surface of the filter plate 202. When the bristles clean the impurities on the outer surface of the filter plate 202, a reaction force will be generated between the bristles and the filter plate 202. During the rising process of the liquid inside the first support frame 101, the airbag 3 04 drives the sliding frame 301 to move upward. At the same time, the water inlet pipe 111 pushes the fixed plate 314 through the injected liquid, so that the roller 308 drives the sliding ring 307 to rotate, and the sliding ring 307 pushes the sliding frame 301 through the rotating rod 305. In this process, the first bristles 306 fixedly connected to the outer wall of the rotating rod 305 clean the outer wall of the filter plate 202, effectively preventing the filter plate 202 from being blocked, and the solid particle pollutants after filtration are discharged through the sewage pipe, thereby ensuring the high efficiency and stability of the hydraulic pump pre-filtration. The first fixed frame 108 is slidably connected to the inner wall of the first support frame 101. The function of the fixed shaft 110 is to limit the sliding frame 301 to slide only in the vertical direction and limit its sliding distance. When the water inlet pipe 11 When water is poured into the first support frame 101, the water generates thrust on the fixed plate 314 fixedly connected to the inner wall of the rotating rod 305. At this time, the thrust received by the rotating rod 305 through the fixed plate 314 drives the sliding frame 301 and the sliding ring 307 to rotate. In this process, as the water level inside the first support frame 101 rises, the sliding frame 301 can slide vertically along the fixed axis 110 within a certain height range with the help of the airbag 304. The sliding height of the sliding frame 301 along the fixed axis 110 will change, and this change can change the inclination angle of the rotating rod 305. The change in the inclination angle of the rotating rod 305 can allow the filter plate 202 to be cleaned when the first support frame 101 is at different water levels.

[0025] A support block 315 is fixedly connected to the inner wall of the fixed plate 314. A connecting frame 317 is arranged outside the support block 315. A connecting shaft 316 is fixedly connected to the outer wall of the side of the connecting frame 317 close to the support block 315. One end of the connecting shaft 316 away from the support block 315 penetrates through the support block 315 and is fixedly connected to a second spring 319. One end of the second spring 319 close to the connecting frame 317 is fixedly connected to the support block 315. A ball 318 is rotatably connected to the inner wall of the connecting frame 317. When the rotating rod 305 drives the sliding frame 301 and the sliding ring 307 to rotate under the thrust received through the fixed plate 314, the connecting frame 317 is pushed toward the filter plate 202 side under the action of the second spring 319. The filter plate 202 is contacted through the ball 318 on the outer surface of the filter plate 202, causing the filter plate 202 to vibrate slightly, thereby improving the efficiency of the impurities detaching from the filter plate 202.

[0026] An elastic component 109 is fixedly connected to the outer wall of the top of the first fixing frame 108. The number of the elastic components 109 is four. The four elastic components 109 are symmetrically arranged with the central axis of the first fixing frame 108 as the center. One end of the elastic component 109 away from the first fixing frame 108 is fixedly connected to a fixed shaft 110. The outer surface of the fixed shaft 110 is slidably connected to the inner wall of the first fixing frame 108. The elastic component 109 has a certain elasticity. When the sliding frame 301 slides downward, the elastic component 109 will bend downward accordingly. The elastic component 109 can also assist the sliding frame 301 to generate vibration.

[0027] The filtering mechanism 2 includes a second support frame 201 fixedly connected to the first support frame 101. A water outlet pipe 204 is fixedly connected to the outer wall of the top of the second support frame 201. A second fixing frame 205 is fixedly connected to the inner wall of the second support frame 201. An inclined plate 206 is fixedly connected to the inner wall of the second fixing frame 205. When the pre-filtering device of the hydraulic pump filters the solid particle pollutants in the liquid, the liquid to be filtered is injected into the inside of the first support frame 101 through the water inlet pipe 111. The solid particle pollutants in the liquid are immediately filtered by the filter plate 202. After the filtering is completed, under the action of pressure, the water is discharged to the water outlet pipe 204 through the inclined plate 206, and then discharged to the hydraulic pump through the water outlet pipe 204.

[0028] A filter plate 202 is fixedly connected to the outer wall of the bottom of the second support frame 201. Through holes 203 are formed in the outer wall of the filter plate 202. The filter plate 202 filters the solid particle pollutants in the liquid through the through holes 203. The inclined plate 206 fixedly connected to the inner wall of the second fixing frame 205 can make the filtered liquid flow more concentratedly to the hydraulic pump, thereby ensuring the normal operation of the hydraulic pump, ensuring the stable operation of the entire hydraulic system, avoiding damage to the hydraulic system caused by the residue of solid particle pollutants, and improving the reliability and durability of the system.

[0029] The inner wall of the connecting block 302 is slidably connected to the outer surface of the fixed shaft 110. A first spring 303 is fixedly connected to the outer wall of the side of the connecting block 302 away from the sliding frame 301. One end of the first spring 303 away from the sliding frame 301 is fixedly connected to the bottom of the fixed shaft 110. The first spring 303 is movably sleeved on the outer surface of the fixed shaft 110. The function of the first spring 303 is to offset the overall weight of the sliding frame 301. In this way, the sliding frame 301 can slide up and down by means of the airbag 304. When the liquid level in the first support frame 101 rises, the airbag 304 will drive the sliding frame 301 to slide upward, and the elasticity of the first spring 303 provides certain assistance for the movement of the sliding frame 301, so as to facilitate the sliding frame 301 to move with the change of the liquid height.

[0030] A roller 308 is rotatably connected to the bottom of the sliding ring 307 through a rotating shaft. The roller 308 is rotatably connected to the inner wall of the groove 104. A second connecting rod 309 is fixedly connected to the inner wall of the sliding ring 307. A second bump 310 is fixedly connected to the outer wall of the side of the second connecting rod 309 away from the sliding ring 307. The second bump 310 is slidably connected to the first bump 107. When the sliding frame 301 drives the sliding ring 307 to rotate through the rotating rod 305, the second bump 310 contacts the first bump 107, causing the sliding ring 307 to vibrate, so that the rotating rod 305 can clean the solid particle contaminants on the outer wall of the sliding frame 301 more efficiently.

[0031] The inner wall of the sliding ring 307 is fixedly connected with a third fixing frame 311. The outer wall of the third fixing frame 311 away from the sliding ring 307 is fixedly connected with second bristles 312. When the first bristles 306 and the second bristles 312 come into contact with the filter plate 202, the reaction force acts on the impurities attached to the first bristles 306 and the second bristles 312. Since there is a certain adhesion force between the impurities and the first bristles 306 and the second bristles 312, the existence of the reaction force breaks the balance state of this adhesion force. The reaction force causes the first bristles 306 and the second bristles 312 to produce slight deformation and vibration. This deformation and vibration can effectively weaken the bonding force between the impurities and the first bristles 306 and the second bristles 312, prompting the impurities to fall off from the first bristles 306 and the second bristles 312. During the continuous oil supply process, the device is in a dynamic operating state. The reaction force continuously changes in direction and magnitude with the relative movement of the first bristles 306 and the second bristles 312 and the filter plate 202. This dynamically changing reaction force can continuously act on the impurities on the first bristles 306 and the second bristles 312, preventing the impurities from adhering and accumulating on the first bristles 306 and the second bristles 312 for a long time. Even when new impurities are continuously cleaned onto the first bristles 306 and the second bristles 312, the reaction force can assist the impurities to fall off in a timely manner, thus ensuring that the first bristles 306 and the second bristles 312 always have good cleaning ability and achieving the effect of continuous cleaning during the continuous oil supply process. The inner wall of the third fixing frame 311 away from the second bristles 312 is fixedly connected with a scraper 313. During the rotation of the sliding ring 307, the second bristles 312 will clean the bottom of the first support frame 101. At the same time, the scraper 313 scrapes the solid particle pollutants at the bottom into the sewage pipe 105.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pre-filtering structure for a hydraulic pump, comprising a support mechanism (1) and an auxiliary mechanism (3), wherein the support mechanism (1) includes a first support frame (101), characterized in that, The auxiliary mechanism (3) includes: A sliding frame (301), the sliding frame (301) is slidably connected to the inner wall of the first support frame (101). An airbag (304) is fixedly connected to the inner wall of the sliding frame (301). A connecting block (302) is fixedly connected to the inner wall of the sliding frame (301). The number of the connecting blocks (302) is four. The four connecting blocks (302) are symmetrically arranged with the central axis of the sliding frame (301) as the center. One side inner wall of the connecting block (302) far away from the sliding frame (301) is rotatably connected to a rotating rod (305) through a rotating shaft. A fixing plate (314) is fixedly connected to the inner wall of the rotating rod (305).

2. The pre-filter structure of a hydraulic pump according to claim 1, characterized in that: One end of the rotating rod (305) far away from the connecting block (302) is provided with a sliding ring (307). The top inner wall of the sliding ring (307) is rotatably connected to the rotating rod (305) through a rotating shaft. A first brush (306) is fixedly connected to the inner wall of the rotating rod (305). During the rising process of the liquid inside the first support frame (101), the airbag (304) drives the sliding frame (301) to move upward. The sliding frame (301) rolls on the inner wall of the groove (104) through a roller (308), so that the sliding ring (307) rotates under the action of the roller (308). The sliding ring (307) pushes the sliding frame (301) upward through the rotating rod (305) rotatably connected by the top rotating shaft, providing auxiliary power for the sliding of the sliding frame (301).

3. The pre-filter structure of a hydraulic pump according to claim 2, characterized in that: The inner wall of the connecting block (302) is slidably connected to the outer surface of a fixed shaft (110). A first spring (303) is fixedly connected to the outer wall of the connecting block (302) far away from the sliding frame (301). One end of the first spring (303) far away from the sliding frame (301) is fixedly connected to the bottom of the fixed shaft (110). The first spring (303) is movably sleeved on the outer surface of the fixed shaft (110). The first spring (303) is used to offset the weight of the sliding frame (301). During the rising process of the liquid inside the first support frame (101), the sliding frame (301) can slide through the airbag (304).

4. A pre-filter structure for a hydraulic pump according to claim 3, characterized in that: A fixed ring (102) is fixedly sleeved on the bottom outer wall of the first support frame (101). A support foot (103) is fixedly connected to the bottom outer wall of the fixed ring (102). A water inlet pipe (111) is fixedly connected to the outer wall of the first support frame (101). A groove (104) is formed on the bottom inner wall of the first support frame (101). A first fixing frame (108) is slidably connected to the top inner wall of the first support frame (101). A sewage pipe (105) is fixedly connected to the bottom outer wall of the first support frame (101). One end outer wall of the sewage pipe (105) far away from the first support frame (101) is fixedly sleeved with a first connecting rod (106). One end of the first connecting rod (106) far away from the sewage pipe (105) is fixedly connected to the fixed ring (102).

5. The pre-filter structure of a hydraulic pump according to claim 2, characterized in that: The bottom of the sliding ring (307) is rotatably connected with a roller (308) through a rotating shaft. The roller (308) is rotatably connected to the inner wall of the groove (104). A second connecting rod (309) is fixedly connected to the inner wall of the sliding ring (307). A first bump (107) is fixedly connected to the inner wall of the first support frame (101) close to the groove (104). A second bump (310) is fixedly connected to the outer wall of the second connecting rod (309) away from the sliding ring (307). The second bump (310) is slidably connected to the first bump (107). The sliding ring (307) generates vibrations after the second bump (310) fixedly connected to the inner wall of the second connecting rod (309) contacts the first bump (107).

6. The pre-filter structure of a hydraulic pump according to claim 4, characterized in that: An elastic component (109) is fixedly connected to the outer wall of the top of the first fixing frame (108). One end of the elastic component (109) away from the first fixing frame (108) is fixedly connected to a fixing shaft (110). The outer surface of the fixing shaft (110) is slidably connected to the inner wall of the first fixing frame (108). The number of the elastic components (109) is four. The four elastic components (109) are symmetrically arranged with the central axis of the first fixing frame (108) as the center. The elastic component (109) has elasticity and bends downward after being pressed by the self-weight of the sliding frame (301).

7. The pre-filter structure of a hydraulic pump according to claim 2, characterized in that: A third fixing frame (311) is fixedly connected to the inner wall of the sliding ring (307). A second brush (312) is fixedly connected to the outer wall of the third fixing frame (311) away from the sliding ring (307). A scraper (313) is fixedly connected to the inner wall of the third fixing frame (311) away from the second brush (312). The roller (308) makes the sliding ring (307) fit and slide along the inner wall of the first support frame (101). During the rotation of the sliding ring (307), the solid particle pollutants at the bottom of the first support frame (101) are scraped into the sewage discharge pipe (105) through the scraper (313) fixedly connected to the bottom of the third fixing frame (311), and the solid particle pollutants are discharged through the sewage discharge pipe (105).

8. A pre-filter structure for a hydraulic pump according to claim 1, characterized in that: A support block (315) is fixedly connected to the inner wall of the fixing plate (314). A connecting frame (317) is arranged outside the support block (315). A connecting shaft (316) is fixedly connected to the outer wall of the connecting frame (317) close to the support block (315). One end of the connecting shaft (316) away from the support block (315) penetrates through the support block (315) and is fixedly connected to a second spring (319). One end of the second spring (319) close to the connecting frame (317) is fixedly connected to the support block (315). A ball (318) is rotatably connected to the inner wall of the connecting frame (317).

9. The pre-filter structure of a hydraulic pump according to claim 1, characterized in that: It further includes a filtering mechanism (2), and the filtering mechanism (2) includes a second support frame (201) fixedly connected to the first support frame (101). A water outlet pipe (204) is fixedly connected to the outer wall of the top of the second support frame (201). A second fixing frame (205) is fixedly connected to the inner wall of the second support frame (201). An inclined plate (206) is fixedly connected to the inner wall of the second fixing frame (205). The inclined plate (206) is arranged in a ring-shaped funnel shape. When the filtered liquid is discharged through the water outlet pipe (204), the inclined plate (206) can cause the liquid to converge towards the side of the water outlet pipe (204), so that the water outlet pipe (204) can discharge the liquid through the water outlet pipe (204) to the hydraulic pump. A filter plate (202) is fixedly connected to the outer wall of the bottom of the second support frame (201). Through holes (203) are formed in the outer wall of the filter plate (202). The filter plate (202) filters the solid particle pollutants in the liquid through the through holes (203).

Images