Hydraulic one-way valve

Abstract

The invention relates to the technical field of one-way valves, in particular to a hydraulic one-way valve. The hydraulic one-way valve comprises an upper valve body, a protective cover, a lower valve body, an external sealing ring, a valve element, an extrusion spring, an internal sealing ring, a circular filter screen assembly and four waste discharging mechanisms, the circular filter screen assembly comprises four telescopic pieces and a circular filter screen piece, and each waste discharging mechanism comprises a waste discharging assembly and a filling assembly. A circular filter screen assembly can filter impurities in oil liquid, purification and cooling of the oil liquid are completed, a waste discharging assembly of the waste discharging mechanism can collect the impurities filtered by the circular filter screen assembly, the service life of the circular filter screen assembly is prolonged, and a filling assembly can collect the impurities filtered by the circular filter screen assembly and also can collect the impurities filtered by the circular filter screen assembly. And the waste discharging assembly can be pushed out after being blocked, then impurities filtered by the circular filter screen assembly continue to be collected, the service life of the circular filter screen assembly is prolonged again, and the maintenance difficulty of the hydraulic one-way valve is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of one-way valves, and in particular to a hydraulic one-way valve. Background Art

[0002] The hydraulic check valve is an important control element in the hydraulic system, mainly used to control the one-way flow of hydraulic oil. The hydraulic check valve is mainly composed of a valve body, a valve core, a spring and other parts. The valve body is the outer shell of the check valve, usually made of high-strength metal materials to withstand the high pressure in the hydraulic system. The valve core is a key component for controlling the flow of oil. Common valve core types include steel ball type and cone valve type. The spring is used to keep the valve core closed when there is no oil pressure or the oil flows in the opposite direction. In the early stage of the hydraulic system, when there is no filter, the oil is easily blocked by impurities, which in turn causes damage to the hydraulic check valve. A filter is installed inside the hydraulic check valve. When the filter is blocked, the maintenance steps are complicated and difficult. Summary of the invention

[0003] Based on this, it is necessary to provide a hydraulic one-way valve to solve at least one of the above technical problems.

[0004] A hydraulic one-way valve comprises an upper valve body, a protective cover, a lower valve body, an external sealing ring, a valve core, an extrusion spring, an internal sealing ring, a circular filter assembly and four waste discharge mechanisms. The protective cover is sleeved on the middle part of the upper valve body, the top of the lower valve body is inserted into the lower end of the upper valve body, the external sealing ring is sleeved on the middle part of the upper valve body, and the external sealing ring is located between the protective cover and the lower valve body. The valve core, the extrusion spring and the internal sealing ring are all accommodated in the interior of the lower valve body, the top of the valve core is inserted into the bottom of the upper valve body, a positioning groove is provided at the bottom of the valve core, the upper end of the extrusion spring is clamped in the positioning groove, the internal sealing ring is clamped in the middle part of the valve core, a liquid inlet groove is provided at the top center of the upper valve body, and a valve core groove is provided at the bottom center of the upper valve body The valve core groove is connected with the liquid inlet groove, and a fixing ring is installed on the lower end side wall of the liquid inlet groove. The circular filter assembly is received in the liquid inlet groove, and the circular filter assembly is installed in abutment with the top of the fixing ring. The four waste discharge mechanisms are slidably penetrated in the protective cover and the upper valve body in turn. The circular filter assembly includes four telescopic parts and a circular filter part. The lower ends of the four telescopic parts are all abutted against the top of the fixing ring. The bottom periphery of the circular filter part is fixedly connected to the upper ends of the four telescopic parts. Each waste discharge mechanism includes a waste discharge assembly and a filling assembly. The waste discharge assembly is slidably penetrated in the protective cover and the upper valve body in turn. The filling assembly is slidably penetrated in the interior of the upper valve body, and one end of the filling assembly is abutted against the waste discharge assembly.

[0005] The valve core is used to block the valve core groove to prevent oil backflow, the extrusion spring is used to cooperate with the valve core, so that the oil can only pass in one direction, the internal sealing ring can prevent oil leakage, the circular filter assembly can filter impurities in the oil, complete the purification and cooling of the oil, thereby extending the service life of the oil and saving costs. The waste discharge assembly of the waste discharge mechanism can collect impurities filtered by the circular filter assembly and extend the service life of the circular filter assembly. The filling assembly can not only collect impurities filtered by the circular filter assembly, but also push out the waste discharge assembly after the waste discharge assembly is blocked, and then continue to collect impurities filtered by the circular filter assembly, thereby further extending the service life of the circular filter assembly and reducing the difficulty of repairing the hydraulic one-way valve.

[0006] In one embodiment, four insertion grooves are provided on the middle outer wall of the upper valve body, and the four insertion grooves all penetrate the outer wall surface of the upper valve body, a first spring groove is provided on the side wall of each insertion groove, a liquid inlet groove is provided on the side wall of the first spring groove, and the liquid inlet groove penetrates the middle inner wall of the upper valve body, an L-shaped upper passing groove is provided on the upper side wall of each insertion groove, one end of the upper passing groove is connected with the corresponding insertion groove, and the other end of the upper passing groove penetrates the inner wall surface of the upper valve body, and an L-shaped lower passing groove is provided on the lower side wall of each insertion groove, one end of the lower passing groove is connected with the corresponding insertion groove, and the other end of the lower passing groove penetrates the inner wall surface of the upper valve body, and the upper passing groove is located above the lower passing groove.

[0007] In one embodiment, a receiving groove is provided on the top side wall of the lower valve body, the receiving groove runs through the top side wall of the lower valve body, a second spring groove is provided on the bottom side wall of the receiving groove, a liquid outlet groove is provided on the bottom side wall of the second spring groove, and the liquid outlet groove runs through the bottom side wall surface of the lower valve body.

[0008] In one embodiment, the bottom of the lower valve body is inserted in the receiving groove, the valve core, the extrusion spring and the internal sealing ring are all received in the receiving groove, the valve core is slidably inserted in the valve core groove, the lower end of the extrusion spring is inserted in the second spring groove, the internal sealing ring is sleeved on the middle part of the valve core, and the top of the internal sealing ring abuts against the bottom side wall of the valve core groove.

[0009] In one embodiment, each telescopic member includes an upper connecting rod and a lower connecting rod, the top of the upper connecting rod is fixedly connected to the bottom periphery of the circular filter element, the bottom of the lower connecting rod is abutted against the top of the fixing ring, the lower end of the upper connecting rod is slidably inserted into the top of the lower connecting rod, and the internal hollow space of the upper connecting rod and the lower connecting rod accommodates a compression spring, the upper end of the compression spring is received and abutted in the upper connecting rod, and the lower end of the compression spring is received and abutted in the lower connecting rod.

[0010] In one embodiment, the circular filter element includes a circular filter and an annular baffle, the bottom of the circular filter is fixedly connected to the top of the upper connecting rod, the annular baffle is installed on the bottom periphery of the circular filter, and the annular baffle is slidably abutted against the side wall of the liquid inlet tank, and the top outer periphery height of the circular filter gradually increases toward the top center height of the circular filter. The annular baffle can prevent the oil from entering the liquid inlet tank when the circular filter element is not blocked, and further prevent the oil from entering the liquid inlet tank and hitting the connecting plate, so that the waste collection element falls out of the insertion tank.

[0011] In one embodiment, each waste discharge assembly includes a waste collecting piece and a circular connecting ring, one end of the waste collecting piece is slidably inserted into the protective cover and the insertion groove in turn, and the side wall of the connecting ring is fixedly connected to the other end of the waste collecting piece.

[0012] In one embodiment, the waste collection member includes a connecting column and a collecting filter, one end of the connecting column is slidably inserted into the protective cover and the insertion groove in turn, and the other end of the connecting column is connected to the side wall of the connecting ring, one end of the collecting filter is connected to one end of the connecting column, and an oil inlet is opened at one end of the top of the collecting filter adjacent to the filling assembly.

[0013] In one embodiment, the packing assembly includes a packing piece and a packing spring, the packing piece is slidably inserted in the middle of the insertion groove, and one end of the packing piece is abutted against the other end of the collecting filter, one end of the packing spring is inserted in the first spring groove, and the other end of the packing spring is sleeved on the other end of the packing piece.

[0014] In one embodiment, the filling member includes an abutting rod, a connecting plate, a blocking plate, a pressure filter, a connecting cover and a spring fixing rod, one end of the abutting rod abuts the other end of the collecting filter, one end of the connecting plate is fixedly connected to the other end of the abutting rod, the blocking plate is fixedly installed on the top of the connecting plate, and the top of the blocking plate slidably abuts against the top side wall of the insertion groove, one end of the pressure filter is fixedly installed on the other end of the blocking plate, the connecting cover is covered on the other end of the pressure filter, one end of the spring fixing rod is fixedly installed on the side wall of the connecting cover, and the other end of the spring fixing rod faces the liquid inlet groove, the diameter of the liquid inlet groove is smaller than the diameter of the first spring groove, the filling spring is sleeved on the outside of the spring fixing rod, the top side wall of the insertion groove is installed with an arc-shaped positioning block, and the top of one end of the blocking plate abuts against the positioning block.

[0015] The present invention is provided with a collecting filter screen. When the hydraulic one-way valve is working, the hydraulic oil will be filtered by the circular filter element to make the hydraulic oil cleaner, thereby making the hydraulic oil complete the work better. After a long time, the circular filter screen on the circular filter element will be blocked, the impact on the circular filter screen will become larger, the circular filter screen will move toward one side of the valve core, and the circular filter screen will push the upper connecting rod to move downward. When the upper connecting rod moves downward, the compression spring is compressed. When the height of the outer peripheral edge of the top of the circular filter screen is aligned with the upper pass groove, the impurities on the top of the circular filter screen can be collected in the collecting filter screen through the upper pass groove. At the same time, the collecting filter screen can filter the oil in the impurities, so that the oil in the impurities returns to the liquid inlet tank through the lower pass groove. After the impurities on the top of the circular filter screen enters the collecting filter screen, the circular filter screen will be partially unblocked to reduce the impact on the circular filter screen. Under the action of the restoring force of the compression spring, the circular filter screen will move toward the side away from the valve core, and this is repeated to extend the service life of the circular filter screen, reduce the number of cleaning times of the circular filter screen, and thereby reduce manpower.

[0016] By setting the lower passage groove, after the collecting filter is blocked, the circular filter is blocked, the impact on the circular filter becomes greater, the circular filter will move toward one side of the valve core, and the circular filter will push the upper connecting rod to move downward. When the upper connecting rod moves downward, the compression spring is compressed, and when the top of the circular filter is flush with the liquid inlet groove, the middle part of the side wall of the circular filter abuts against the lower passage groove, and the impurities on the top of the circular filter can be collected in the pressure filter through the liquid inlet groove and the first spring groove in sequence. At the same time, the pressure filter can filter the oil in the impurities, so that the oil in the impurities enters the lower passage groove, and the oil rushes out from the lower passage groove to impact the middle part of the side wall of the circular filter, so that the impurities adsorbed inside the circular filter are disturbed and the circular filter is unblocked. After the circular filter is unblocked, the impurities on the top of the circular filter are disturbed, so that the impurities on the top of the circular filter can enter the pressure filter more thoroughly, so as to extend the service life of the circular filter, reduce the number of cleaning times of the circular filter, and thus reduce manpower.

[0017] By arranging the pressure filter, the compression spring and the collecting filter, after the pressure filter is blocked, the impact on the end of the pressure filter away from the connecting cover becomes greater, and after the upper passage groove is blocked and the collecting filter is blocked, since the oil inlet is opened at the end away from the connecting column, the impact force on the end of the collecting filter adjacent to the connecting column is relatively large. Under the impact force of the pressure filter, the restoring force of the packing spring and the impact of the collecting filter, the blocking plate is separated from the abutment of the positioning block, and the abutment rod will push away the waste collecting piece, and the waste collecting piece extends out of the end of the connecting cover away from the insertion groove to remind the staff to clean it. At the same time, after the abutment rod pushes away the waste collecting piece, the blocking plate will be blocked in the upper passage groove to prevent oil from flowing out of the upper passage groove.

[0018] By setting a waste collection piece, after cleaning the waste collection piece, the waste collection piece is reinserted into the insertion groove, the collecting filter will push the connecting plate to move toward the side of the liquid inlet groove, the stuffing spring is compressed, and finally the top of one end of the blocking plate abuts against the positioning block, and the oil above the circular filter rushes out after passing through the upper passage groove, the collecting filter and the lower passage groove, so as to impact the middle part of the side wall of the circular filter, so that the impurities adsorbed inside the circular filter are further disturbed and the circular filter is unblocked. After the circular filter is unblocked, the impurities on the top of the circular filter are disturbed, so that the impurities on the top of the circular filter can enter the pressure filter more thoroughly. After the circular filter is unblocked, the impact on the circular filter becomes smaller, and under the action of the restoring force of the compression spring, the circular filter will move toward the side away from the valve core, and this is repeated to extend the service life of the circular filter, reduce the number of cleaning times of the circular filter, and thus reduce manpower.

[0019] The invention has a simple structure and can effectively filter impurities in oil, purify and cool the oil, extend the service life of the oil, and save costs. At the same time, the filter screen can be cleaned without disassembling the hydraulic one-way valve, thereby extending the service life of the filter screen and reducing the difficulty of repairing the hydraulic one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of an overall embodiment.

[0021] Figure 2 It is an overall cross-sectional view of an embodiment.

[0022] Figure 3 It is an exploded view of an overall embodiment.

[0023] Figure 4 An embodiment Figure 2 A magnified schematic diagram of center A.

[0024] Figure 5 It is a three-dimensional schematic diagram of a circular filter assembly and a waste discharge mechanism according to an embodiment.

[0025] Figure 6 It is a three-dimensional schematic diagram of a partial waste discharge mechanism of an embodiment.

[0026] In the figure: 10, upper valve body; 11, protective cover; 12, lower valve body; 13, external sealing ring; 14, valve core; 15, extrusion spring; 16, internal sealing ring; 17, fixing ring; 100, liquid inlet groove; 101, valve core groove; 102, insertion groove; 103, first spring groove; 104, liquid inlet groove; 105, upper passage groove; 106, lower passage groove; 120, storage groove; 121, second spring groove; 122, liquid outlet groove; 140, positioning groove; 20, circular filter assembly; 21, telescopic member; 22, circular filter member; 210, upper connecting rod; 211, lower connecting rod; 220, circular filter; 221, annular baffle; 30, waste discharge mechanism; 31, waste discharge assembly; 32, stuffing assembly; 310, waste collection piece; 311, connecting ring; 312, connecting column; 313, collection filter; 314, oil inlet; 320, stuffing piece; 321, stuffing spring; 322, abutting rod; 323, connecting plate; 324, blocking plate; 325, pressure filter; 326, connecting cover; 327, spring fixing rod; 328, positioning block. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] An embodiment provided by the present invention is as follows: Figures 1 to 6As shown, a hydraulic one-way valve comprises an upper valve body 10, a protective cover 11, a lower valve body 12, an external sealing ring 13, a valve core 14, an extrusion spring 15, an internal sealing ring 16, a circular filter assembly 20 and four waste discharge mechanisms 30. The protective cover 11 is sleeved on the middle of the upper valve body 10, the top of the lower valve body 12 is inserted into the lower end of the upper valve body 10, the external sealing ring 13 is sleeved on the middle of the upper valve body 10, and the external sealing ring 13 is located at the protective cover. Between the cover 11 and the lower valve body 12, the valve core 14, the extrusion spring 15 and the internal sealing ring 16 are all received in the lower valve body 12, the top of the valve core 14 is inserted into the bottom of the upper valve body 10, the bottom of the valve core 14 is provided with a clamping groove 140, the upper end of the extrusion spring 15 is clamped in the clamping groove 140, the internal sealing ring 16 is clamped in the middle of the valve core 14, the top center of the upper valve body 10 is provided with a liquid inlet groove 100, and the bottom center of the upper valve body 10 is provided with a A valve core groove 101 is provided, the valve core groove 101 is connected to the liquid inlet groove 100, a fixing ring 17 is installed on the lower end side wall of the liquid inlet groove 100, a circular filter assembly 20 is received in the liquid inlet groove 100, and the circular filter assembly 20 is installed against the top of the fixing ring 17, four waste discharge mechanisms 30 are slidably penetrated in the protective cover 11 and the upper valve body 10 in sequence, the circular filter assembly 20 includes four telescopic parts 21 and a circular filter part 22, the four telescopic parts 21 and the circular filter part 22 are provided, and the four telescopic parts 21 and the circular filter part 22 are provided. The lower ends of the retractable parts 21 are all in contact with the top of the fixing ring 17, and the bottom periphery of the circular filter member 22 is fixedly connected to the upper ends of the four retractable parts 21. Each waste discharge mechanism 30 includes a waste discharge component 31 and a filling component 32. The waste discharge component 31 is slidably arranged in the protective cover 11 and the upper valve body 10 in turn, and the filling component 32 is slidably arranged in the interior of the upper valve body 10, and one end of the filling component 32 is in contact with the waste discharge component 31.

[0031] The valve core 14 is used to block the valve core groove 101 to prevent the oil from flowing back. The extrusion spring 15 is used to cooperate with the valve core 14 so that the oil can only pass in one direction. The internal sealing ring 16 can prevent oil leakage. The circular filter assembly 20 can filter impurities in the oil, complete the purification and cooling of the oil, thereby extending the service life of the oil and saving costs. The waste discharge assembly 31 of the waste discharge mechanism 30 can collect impurities filtered by the circular filter assembly 20 and extend the service life of the circular filter assembly 20. The filling assembly 32 can not only collect impurities filtered by the circular filter assembly 20, but also push out the waste discharge assembly 31 after the waste discharge assembly 31 is blocked, and then continue to collect impurities filtered by the circular filter assembly 20, thereby further extending the service life of the circular filter assembly 20 and reducing the difficulty of repairing the hydraulic one-way valve.

[0032] like Figures 1 to 6As shown, four insertion grooves 102 are provided on the middle outer wall of the upper valve body 10, and the four insertion grooves 102 all penetrate the outer wall surface of the upper valve body 10, and a first spring groove 103 is provided on the side wall of each insertion groove 102, and a liquid inlet groove 104 is provided on the side wall of the first spring groove 103, and the liquid inlet groove 104 penetrates the middle inner wall of the upper valve body 10, and an L-shaped upper pass groove 105 is provided on the upper side wall of each insertion groove 102, one end of the upper pass groove 105 is connected to the corresponding insertion groove 102, and the other end of the upper pass groove 105 penetrates the inner wall surface of the upper valve body 10, and an L-shaped lower pass groove 106 is provided on the lower side wall of each insertion groove 102, one end of the lower pass groove 106 is connected to the corresponding insertion groove 102, and the other end of the lower pass groove 106 penetrates the inner wall surface of the upper valve body 10, and the upper pass groove 105 is located above the lower pass groove 106.

[0033] like Figure 2 As shown, a receiving groove 120 is provided on the top side wall of the lower valve body 12, and the receiving groove 120 passes through the top side wall of the lower valve body 12. A second spring groove 121 is provided on the bottom side wall of the receiving groove 120, and a liquid outlet groove 122 is provided on the bottom side wall of the second spring groove 121, and the liquid outlet groove 122 passes through the bottom side wall surface of the lower valve body 12.

[0034] like Figure 2 As shown, the bottom of the lower valve body 12 is inserted in the receiving groove 120, the valve core 14, the extrusion spring 15 and the internal sealing ring 16 are all received in the receiving groove 120, the valve core 14 is slidably inserted in the valve core groove 101, the lower end of the extrusion spring 15 is inserted in the second spring groove 121, the internal sealing ring 16 is sleeved on the middle part of the valve core 14, and the top of the internal sealing ring 16 abuts against the bottom side wall of the valve core groove 101.

[0035] like Figures 2 to 5 As shown, each telescopic member 21 includes an upper connecting rod 210 and a lower connecting rod 211. The top of the upper connecting rod 210 is fixedly connected to the bottom periphery of the circular filter member 22, and the bottom of the lower connecting rod 211 is abutted against the top of the fixing ring 17. The lower end of the upper connecting rod 210 is slidably inserted into the top of the lower connecting rod 211. The upper connecting rod 210 and the lower connecting rod 211 have hollow interiors that accommodate compression springs (not shown in the figure), and the upper end of the compression spring is received and abutted in the upper connecting rod 210, and the lower end of the compression spring is received and abutted in the lower connecting rod 211.

[0036] like Figures 2 to 5As shown, the circular filter element 22 includes a circular filter 220 and an annular baffle 221. The bottom of the circular filter 220 is fixedly connected to the top of the upper connecting rod 210. The annular baffle 221 is installed on the bottom periphery of the circular filter 220, and the annular baffle 221 is slidably abutted against the side wall of the liquid inlet tank 100. The height of the top outer periphery of the circular filter 220 gradually increases toward the top center height of the circular filter 220. The annular baffle 221 can prevent the oil from entering the liquid inlet tank 104 when the circular filter element 22 is not blocked, and further prevent the oil from entering the liquid inlet tank 104 and hitting the connecting plate 323, so that the waste collecting member 310 is out of the insertion tank 102.

[0037] like Figures 2 to 5 As shown, each waste discharge assembly 31 includes a waste collecting piece 310 and a circular connecting ring 311. One end of the waste collecting piece 310 is slidably inserted into the protective cover 11 and the insertion groove 102 in sequence, and the side wall of the connecting ring 311 is fixedly connected to the other end of the waste collecting piece 310.

[0038] like Figures 4 to 6 As shown, the waste collection member 310 includes a connecting column 312 and a collecting filter 313, one end of the connecting column 312 is slidably inserted into the protective cover 11 and the insertion groove 102 in sequence, and the other end of the connecting column 312 is connected to the side wall of the connecting ring 311, one end of the collecting filter 313 is connected to one end of the connecting column 312, and an oil inlet 314 is opened at one end of the top of the collecting filter 313 adjacent to the filling assembly 32.

[0039] like Figures 4 to 6 As shown, the packing assembly 32 includes a packing piece 320 and a packing spring 321. The packing piece 320 is slidably inserted in the middle of the insertion groove 102, and one end of the packing piece 320 is abutted against the other end of the collecting filter 313. One end of the packing spring 321 is inserted in the first spring groove 103, and the other end of the packing spring 321 is sleeved on the other end of the packing piece 320.

[0040] like Figures 2 to 6As shown, the filling member 320 includes an abutting rod 322, a connecting plate 323, a blocking plate 324, a pressure filter 325, a connecting cover 326 and a spring fixing rod 327. One end of the abutting rod 322 abuts against the other end of the collecting filter 313, one end of the connecting plate 323 is fixedly connected to the other end of the abutting rod 322, the blocking plate 324 is fixedly installed on the top of the connecting plate 323, and the top of the blocking plate 324 slidably abuts against the top side wall of the insertion groove 102, and one end of the pressure filter 325 is fixedly installed on the top of the connecting plate 323. The other end of the blocking plate 324 and the connecting cover 326 are covered on the other end of the pressure filter 325, one end of the spring fixing rod 327 is fixedly installed on the side wall of the connecting cover 326, and the other end of the spring fixing rod 327 faces the liquid inlet groove 104, the diameter of the liquid inlet groove 104 is smaller than the diameter of the first spring groove 103, the filling spring 321 is sleeved on the outside of the spring fixing rod 327, and the top side wall of the insertion groove 102 is installed with an arc-shaped locking block 328, and the top of one end of the blocking plate 324 abuts against the locking block 328.

[0041] During installation: the circular filter assembly 20 is installed in contact with the top of the fixing ring 17, the lower ends of the four telescopic parts 21 are all in contact with the top of the fixing ring 17, the blocking plate 324 is fixedly installed on the top of the connecting plate 323, one end of the pressure filter 325 is fixedly installed on the other end of the blocking plate 324, and one end of the spring fixing rod 327 is fixedly installed on the side wall of the connecting cover 326.

[0042] When in use: 1. Install the hydraulic one-way valve in the hydraulic system, and insert the plugging components 32 and the waste discharge components 31 of the four waste discharge mechanisms 30 into the insertion groove 102 in sequence. When the hydraulic system starts to infuse hydraulic oil, the hydraulic oil will push the valve core 14 toward one side of the extrusion spring 15. When the valve core 14 moves toward one side of the extrusion spring 15, the extrusion spring 15 is compressed and opened, so that the liquid inlet groove 100, the valve core groove 101, the receiving groove 120, the second spring groove 121, and the liquid outlet groove 122 are connected, thereby allowing the hydraulic oil to move in the hydraulic one-way valve.

[0043] 2. When the hydraulic one-way valve is working, the hydraulic oil will be filtered by the circular filter element 22, making the hydraulic oil cleaner, thereby making the hydraulic oil perform its work better. After a long time, the circular filter 220 on the circular filter element 22 will be blocked, and the impact on the circular filter 220 will become greater. The circular filter 220 will move toward one side of the valve core 14, and the circular filter 220 will push the upper connecting rod 210 to move downward. When the upper connecting rod 210 moves downward, the compression spring is compressed, and the height of the top outer peripheral edge of the circular filter 220 gradually increases toward the height of the top center of the circular filter 220, that is, the top of the circular filter 220 is umbrella-shaped, so that impurities on the top of the circular filter 220 can be accumulated on the top outer peripheral edge of the circular filter 220. When the height of the top outer peripheral edge of the circular filter 220 is aligned with the upper passage groove 105, the impurities on the top of the circular filter 220 can be collected in the collecting filter 313 through the upper passage groove 105, and the collecting filter 313 can filter the oil in the impurities so that the oil in the impurities returns to the liquid inlet tank 100 through the lower passage groove 106. After the impurities on the top of the circular filter 220 enter the collecting filter 313, the circular filter 220 will be partially unblocked to reduce the impact on the circular filter 220. Under the action of the restoring force of the compression spring, the circular filter 220 will move toward the side away from the valve core 14, and this is repeated to extend the service life of the circular filter 220, reduce the number of cleaning times of the circular filter 220, and thereby reduce manpower.

[0044] 3. After the collection filter 313 is blocked, the circular filter 220 is blocked, and the impact on the circular filter 220 becomes greater. The circular filter 220 will move toward one side of the valve core 14, and the circular filter 220 will push the upper connecting rod 210 to move downward. When the upper connecting rod 210 moves downward, the compression spring is compressed. When the top of the circular filter 220 is flush with the liquid inlet tank 104, the middle of the side wall of the circular filter 220 abuts against the lower passage groove 106, and the impurities on the top of the circular filter 220 can be collected in the pressure filter 325 through the liquid inlet tank 104 and the first spring groove 103 in turn, and the pressure filter 325 is pressed. The filter screen 325 can filter the oil in the impurities, so that the oil in the impurities enters the lower passage groove 106, and the oil rushes out from the lower passage groove 106 to impact the middle part of the side wall of the circular filter screen 220, so that the impurities adsorbed inside the circular filter screen 220 are disturbed, and the circular filter screen 220 is unblocked. After the circular filter screen 220 is unblocked, the impurities on the top of the circular filter screen 220 are disturbed, so that the impurities on the top of the circular filter screen 220 can enter the pressure filter screen 325 more thoroughly, so as to extend the service life of the circular filter screen 220, reduce the number of cleaning times of the circular filter screen 220, and thus reduce manpower.

[0045] After the oil filter 325 is plugged, the end of the oil filter 325 away from the connecting cover 326 is impacted more. After the upper passage groove 105 is blocked, the collecting filter 313 is blocked, because the oil inlet 314 is opened at the end away from the connecting column 312, the end of the collecting filter 313 adjacent to the connecting column 312 is impacted more. Under the impact force of the oil filter 325, the restoring force of the packing spring 321 and the impact of the collecting filter 313, the blocking plate 324 is separated from the abutment of the positioning block 328, and the abutment rod 322 will push away the waste collecting piece 310. The waste collecting piece 310 extends out of the end of the connecting cover 326 away from the insertion groove 102 to remind the staff to clean it. At the same time, after the abutment rod 322 pushes away the waste collecting piece 310, the blocking plate 324 will be blocked in the upper passage groove 105 to prevent the oil from flowing out of the upper passage groove 105.

[0046] 5. After cleaning the waste collecting piece 310, reinsert the waste collecting piece 310 into the insertion groove 102, and the collecting filter 313 pushes the connecting plate 323 to move toward the side of the liquid inlet groove 104, and the packing spring 321 is compressed, and finally the top of one end of the blocking plate 324 abuts against the positioning block 328, and the oil above the circular filter 220 is rushed out after passing through the upper passage groove 105, the collecting filter 313 and the lower passage groove 106, and is used to impact the middle part of the side wall of the circular filter 220, so that the impurities adsorbed inside the circular filter 220 are further removed. Disturbance, dredge the circular filter 220. After the circular filter 220 is dredged, the impurities on the top of the circular filter 220 are disturbed, so that the impurities on the top of the circular filter 220 can more thoroughly enter the pressure filter 325. After the circular filter 220 is dredged, the impact on the circular filter 220 becomes smaller. Under the action of the restoring force of the compression spring, the circular filter 220 will move toward the side away from the valve core 14, and this is repeated to extend the service life of the circular filter 220, reduce the number of cleaning times of the circular filter 220, and thus reduce manpower.

[0047] 6. After the hydraulic one-way valve stops working, the connecting ring 311 can be squeezed hard to compress the stuffing spring 321 to the limit, and the connecting ring 311 can be pulled out instantly. Under the action of the restoring force of the stuffing spring 321, the blocking plate 324 will quickly pass through the positioning block 328, so that the abutment rod 322 can be extended to the outside of the insertion groove 102. The stuffing piece 320 can be pulled out by taking the abutment rod 322, and then the stuffing piece 320 can be cleaned. The circular filter screen 220 can be cleaned without disassembling the hydraulic one-way valve, thereby reducing the difficulty of repairing the hydraulic one-way valve.

[0048] The present invention sets a collecting filter screen 313. When the hydraulic one-way valve is working, the hydraulic oil will be filtered by the circular filter element 22 to make the hydraulic oil cleaner, thereby making the hydraulic oil perform its work better. After a long time, the circular filter screen 220 on the circular filter element 22 will be blocked, and the impact on the circular filter screen 220 will increase. The circular filter screen 220 will move toward one side of the valve core 14, and the circular filter screen 220 will push the upper connecting rod 210 to move downward. When the upper connecting rod 210 moves downward, the compression spring is compressed. When the top outer peripheral edge height of the circular filter screen 220 is aligned with the upper passage groove 105, the top of the circular filter screen 220 The impurities can be collected in the collecting filter 313 through the upper passage groove 105. At the same time, the collecting filter 313 can filter the oil in the impurities, so that the oil in the impurities returns to the liquid inlet tank 100 through the lower passage groove 106. After the impurities on the top of the circular filter 220 enter the collecting filter 313, the circular filter 220 will be partially unblocked to reduce the impact on the circular filter 220. Under the action of the restoring force of the compression spring, the circular filter 220 will move toward the side away from the valve core 14, and this is repeated to extend the service life of the circular filter 220, reduce the number of cleaning times of the circular filter 220, and thereby reduce manpower.

[0049] By setting the lower passage groove 106, after the collecting filter 313 is blocked, the circular filter 220 is blocked, the impact on the circular filter 220 becomes greater, the circular filter 220 will move toward one side of the valve core 14, and the circular filter 220 will push the upper connecting rod 210 to move downward. When the upper connecting rod 210 moves downward, the compression spring is compressed. When the top of the circular filter 220 is flush with the liquid inlet groove 104, the middle of the side wall of the circular filter 220 abuts against the lower passage groove 106, and the impurities on the top of the circular filter 220 can be collected in the pressure filter 325 through the liquid inlet groove 104 and the first spring groove 103 in turn. At the same time, the pressure filter 325 can filter the oil in the impurities, so that the oil in the impurities enters the lower passage groove 106, and the oil rushes out from the lower passage groove 106 to impact the middle part of the side wall of the circular filter 220, so that the impurities adsorbed inside the circular filter 220 are disturbed, and the circular filter 220 is unblocked. After the circular filter 220 is unblocked, the impurities on the top of the circular filter 220 are disturbed, so that the impurities on the top of the circular filter 220 can enter the pressure filter 325 more thoroughly, so as to extend the service life of the circular filter 220, reduce the number of cleaning times of the circular filter 220, and thus reduce manpower.

[0050] By providing the pressure filter 325, the compression spring and the collecting filter 313, after the pressure filter 325 is blocked, the impact on the end of the pressure filter 325 away from the connecting cover 326 becomes larger. After the upper passage 105 is blocked, after the collecting filter 313 is blocked, since the oil inlet 314 is opened at the end away from the connecting column 312, the impact force on the end of the collecting filter 313 adjacent to the connecting column 312 is larger. 1 and the impact of the collecting filter screen 313, the blocking plate 324 will be separated from the abutment of the positioning block 328, and the abutment rod 322 will push the waste collecting piece 310 away. The waste collecting piece 310 extends out of the end of the connecting cover 326 that is arranged away from the insertion groove 102 to remind the staff to clean it. At the same time, after the abutment rod 322 pushes the waste collecting piece 310 away, the blocking plate 324 will be blocked in the upper passage groove 105 to prevent the oil from flowing out of the upper passage groove 105.

[0051] By setting the waste collecting piece 310, after cleaning the waste collecting piece 310, the waste collecting piece 310 is reinserted into the insertion groove 102, the collecting filter screen 313 pushes the connecting plate 323 to move toward the side of the liquid inlet groove 104, the packing spring 321 is compressed, and finally the top of one end of the blocking plate 324 abuts against the blocking block 328, and the oil above the circular filter screen 220 is rushed out after passing through the upper passage groove 105, the collecting filter screen 313 and the lower passage groove 106, so as to impact the middle part of the side wall of the circular filter screen 220, so that the impurities adsorbed inside the circular filter screen 220 are The circular filter 220 is further disturbed to clear the circular filter 220. After the circular filter 220 is cleared, the impurities on the top of the circular filter 220 are disturbed, so that the impurities on the top of the circular filter 220 can enter the pressure filter 325 more thoroughly. After the circular filter 220 is cleared, the impact on the circular filter 220 becomes smaller. Under the action of the restoring force of the compression spring, the circular filter 220 will move toward the side away from the valve core 14, and this is repeated to extend the service life of the circular filter 220, reduce the number of cleaning times of the circular filter 220, and thus reduce manpower.

[0052] The invention has a simple structure and can effectively filter impurities in oil, purify and cool the oil, extend the service life of the oil, and save costs. At the same time, the filter screen can be cleaned without disassembling the hydraulic one-way valve, thereby extending the service life of the filter screen and reducing the difficulty of repairing the hydraulic one-way valve.

[0053] All possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-mentioned embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A hydraulic one-way valve, characterized in that: The invention comprises an upper valve body (10), a protective cover (11), a lower valve body (12), an external sealing ring (13), a valve core (14), an extrusion spring (15), an internal sealing ring (16), a circular filter assembly (20) and four waste discharge mechanisms (30), wherein the protective cover (11) is sleeved on the middle part of the upper valve body (10), the top of the lower valve body (12) is inserted into the lower end of the upper valve body (10), the external sealing ring (13) is sleeved on the middle part of the upper valve body (10), and the external sealing ring (13) is located between the protective cover (11) and the lower valve body The valve core (14), the extrusion spring (15) and the internal sealing ring (16) are all received in the interior of the lower valve body (12); the top of the valve core (14) is inserted into the bottom of the upper valve body (10); the bottom of the valve core (14) is provided with a locking groove (140); the upper end of the extrusion spring (15) is locked in the locking groove (140); the internal sealing ring (16) is locked in the middle of the valve core (14); the top center of the upper valve body (10) is provided with a liquid inlet groove (100); the bottom center of the upper valve body (10) is provided with a The valve core groove (101) is connected to the liquid inlet groove (100), a fixing ring (17) is installed on the lower side wall of the liquid inlet groove (100), a circular filter assembly (20) is received in the liquid inlet groove (100), and the circular filter assembly (20) is installed against the top of the fixing ring (17), four waste discharge mechanisms (30) are slidably arranged in sequence in the protective cover (11) and the upper valve body (10), the circular filter assembly (20) includes four telescopic parts (21) and a circular filter member (22), the four telescopic parts (21) and the circular filter assembly (22) are connected to the upper valve body (100), and the circular filter assembly (20) is installed in the lower side wall of the liquid inlet groove (100). The lower ends of the retractable parts (21) are all in contact with the top of the fixing ring (17); the bottom periphery of the circular filter element (22) is fixedly connected to the upper ends of the four retractable parts (21); each waste discharge mechanism (30) comprises a waste discharge component (31) and a filling component (32); the waste discharge component (31) is slidably inserted into the protective cover (11) and the upper valve body (10) in sequence; the filling component (32) is slidably inserted into the interior of the upper valve body (10), and one end of the filling component (32) is in contact with the waste discharge component (31).

2. The hydraulic one-way valve according to claim 1, characterized in that: The middle outer wall of the upper valve body (10) is provided with four insertion grooves (102), the four insertion grooves (102) all penetrate the outer wall surface of the upper valve body (10), the side wall of each insertion groove (102) is provided with a first spring groove (103), the side wall of the first spring groove (103) is provided with a liquid inlet groove (104), the liquid inlet groove (104) penetrates the middle inner wall of the upper valve body (10), the upper side wall of each insertion groove (102) is provided with an L-shaped upper passage groove (105), the upper passage groove One end of the upper passage groove (105) is connected to the corresponding insertion groove (102), and the other end of the upper passage groove (105) passes through the inner wall surface of the upper valve body (10), and the lower wall of each insertion groove (102) is provided with an L-shaped lower passage groove (106), one end of the lower passage groove (106) is connected to the corresponding insertion groove (102), and the other end of the lower passage groove (106) passes through the inner wall surface of the upper valve body (10), and the upper passage groove (105) is located above the lower passage groove (106).

3. The hydraulic one-way valve according to claim 2, characterized in that: A receiving groove (120) is provided on the top side wall of the lower valve body (12), the receiving groove (120) runs through the top side wall of the lower valve body (12), a second spring groove (121) is provided on the bottom side wall of the receiving groove (120), a liquid outlet groove (122) is provided on the bottom side wall of the second spring groove (121), and the liquid outlet groove (122) runs through the bottom side wall surface of the lower valve body (12).

4. The hydraulic one-way valve according to claim 3, characterized in that: The bottom of the lower valve body (12) is inserted into the receiving groove (120), the valve core (14), the extrusion spring (15) and the internal sealing ring (16) are all received in the receiving groove (120), the valve core (14) is slidably inserted into the valve core groove (101), the lower end of the extrusion spring (15) is inserted into the second spring groove (121), the internal sealing ring (16) is sleeved on the middle part of the valve core (14), and the top of the internal sealing ring (16) abuts against the bottom side wall of the valve core groove (101).

5. The hydraulic one-way valve according to claim 4, characterized in that: Each telescopic member (21) comprises an upper connecting rod (210) and a lower connecting rod (211); the top of the upper connecting rod (210) is fixedly connected to the bottom periphery of the circular filter element (22); the bottom of the lower connecting rod (211) is in contact with the top of the fixing ring (17); the lower end of the upper connecting rod (210) is slidably inserted into the top of the lower connecting rod (211); the upper connecting rod (210) and the lower connecting rod (211) have hollow interiors that accommodate compression springs; the upper end of the compression spring is received and abutted in the upper connecting rod (210); and the lower end of the compression spring is received and abutted in the lower connecting rod (211).

6. The hydraulic one-way valve according to claim 5, characterized in that: The circular filter element (22) comprises a circular filter (220) and an annular baffle (221); the bottom of the circular filter (220) is fixedly connected to the top of the upper connecting rod (210); the annular baffle (221) is mounted on the bottom periphery of the circular filter (220); and the annular baffle (221) is slidably abutted against the side wall of the liquid inlet tank (100); and the height of the top outer periphery of the circular filter (220) gradually increases towards the top center height of the circular filter (220).

7. The hydraulic one-way valve according to claim 6, characterized in that: Each waste discharge assembly (31) comprises a waste collecting piece (310) and a circular connecting ring (311); one end of the waste collecting piece (310) is slidably inserted into the protective cover (11) and the insertion groove (102) in sequence; and a side wall of the connecting ring (311) is fixedly connected to the other end of the waste collecting piece (310).

8. The hydraulic one-way valve according to claim 7, characterized in that: The waste collection member (310) comprises a connecting column (312) and a collecting filter (313); one end of the connecting column (312) is slidably inserted into the protective cover (11) and the insertion groove (102) in sequence, and the other end of the connecting column (312) is connected to the side wall of the connecting ring (311); one end of the collecting filter (313) is connected to one end of the connecting column (312), and an oil inlet (314) is provided at one end of the top of the collecting filter (313) adjacent to the packing assembly (32).

9. The hydraulic one-way valve according to claim 8, characterized in that: The packing assembly (32) comprises a packing piece (320) and a packing spring (321); the packing piece (320) is slidably inserted in the middle of the insertion groove (102), and one end of the packing piece (320) is in contact with the other end of the collection filter (313); one end of the packing spring (321) is inserted in the first spring groove (103), and the other end of the packing spring (321) is sleeved on the other end of the packing piece (320).

10. The hydraulic one-way valve according to claim 9, characterized in that: The filling member (320) comprises an abutting rod (322), a connecting plate (323), a blocking plate (324), a pressure filter (325), a connecting cover (326) and a spring fixing rod (327), one end of the abutting rod (322) abuts against the other end of the collecting filter (313), one end of the connecting plate (323) is fixedly connected to the other end of the abutting rod (322), the blocking plate (324) is fixedly mounted on the top of the connecting plate (323), and the top of the blocking plate (324) is slidably abutted against the top side wall of the insertion groove (102), one end of the pressure filter (325) is fixedly mounted on the blocking plate (324), and the pressure filter (325) is fixedly mounted on the blocking plate (324). The other end of the plug plate (324) and the connecting cover (326) are covered on the other end of the pressure filter (325). One end of the spring fixing rod (327) is fixedly mounted on the side wall of the connecting cover (326), and the other end of the spring fixing rod (327) faces the liquid inlet groove (104). The diameter of the liquid inlet groove (104) is smaller than the diameter of the first spring groove (103). The stuffing spring (321) is sleeved on the outside of the spring fixing rod (327). The top side wall of the insertion groove (102) is installed with an arc-shaped blocking block (328), and the top of one end of the plug plate (324) abuts against the blocking block (328).

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