A hydraulic cylinder fluid pressure execution system

Abstract

The application discloses a hydraulic cylinder fluid pressure execution system, which is characterized by comprising a hydraulic pump, an oil tank, an overflow valve, a throttle valve, a reversing valve, a hydraulic cylinder and an oil return filter, wherein the hydraulic pump is connected between the oil tank and the reversing valve, the overflow valve and the throttle valve are connected to the reversing valve, the hydraulic cylinder is connected to the reversing valve and the oil return filter through a pipe body, the hydraulic cylinder comprises a cylinder, an oil separation pad, a support, an oil separation layer, a laminated layer, a rod body and a sealing ring, the oil separation pad is installed on the inner surface of the cylinder, the support is supported on the outer surface of the cylinder, the sealing ring is arranged in the cylinder and divides the cylinder into a rod cavity and a rodless cavity, during the extension of the rod body out of the cylinder, oil is shunted to the oil separation layer through a three-way pipe with a one-way valve, a rotating body is driven to rotate, and the residual oil on the surface of the rod body is scraped and separated, so that the hardening and pitting caused by the attachment of small impurities on the rod body during the extension of the rod body is effectively avoided, or the small impurities are brought into the system, thereby guaranteeing the internal cleanliness and operation reliability of the hydraulic cylinder.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic cylinders, and more specifically, relates to a fluid pressure actuation system for a hydraulic cylinder. Background Technology

[0002] The fluid pressure actuator of a hydraulic cylinder uses hydraulic oil as the working medium, is powered by a pump station, and is controlled by a valve group to precisely regulate the pressure, flow and direction of the oil, thereby driving the piston and rod in the cylinder to perform linear reciprocating motion. This efficiently and reliably converts the pressure energy of the fluid into mechanical energy, enabling the pushing, pulling, lifting or precise position control of the load.

[0003] In special working conditions such as mines and seas, a large amount of pollutants such as dust, metal shavings and salt spray in the environment can easily adhere to the oil film on the surface of the rod. When the rod retracts into the cylinder, these pollutants are carried into the hydraulic cylinder, which can not only scratch the surface of the rod and the seals, causing hydraulic oil leakage, but also contaminate the entire hydraulic system, seriously affecting the reliability and service life of the system. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention provides a hydraulic cylinder fluid pressure actuation system, the purpose and effectiveness of which are achieved through the following specific technical means:

[0005] Its structure includes a hydraulic pump, an oil tank, an overflow valve, a throttle valve, a directional valve, a hydraulic cylinder, and a return oil filter. The hydraulic pump is connected between the oil tank and the directional valve. The overflow valve and the throttle valve are connected to the directional valve. The hydraulic cylinder is connected to the directional valve and the return oil filter through a pipe.

[0006] The hydraulic cylinder includes a cylinder, an oil separator, a bracket, an oil separation layer, a stack, a rod, and a sealing ring. The oil separator is installed on the inner surface of the cylinder, the bracket is supported on the outer surface of the cylinder, the sealing ring is integrated with the rod, the oil separation layer is fixed on the outer surface of the cylinder, the stack is connected between the oil separation layer and the rod and is movable, and the rod is located inside the cylinder.

[0007] The rod passes through the stack, the oil separation layer, the oil cylinder, and the oil separator in sequence. The oil in the rod chamber of the oil cylinder flows into the oil separation layer while flowing towards the reversing valve. The oil separator performs a first-layer scraping of the oil carried by the rod, and the oil separation layer performs a second-layer scraping and separation of the residual oil. The sealing ring is located inside the oil cylinder and is divided into a rod chamber and a rodless chamber.

[0008] As a further improvement of the present invention, the oil separation layer includes an inlet, a partition, a guide strip, a swivel body, an outlet, a collection layer, a one-way port, a force-bearing blade, and a central hole. The inlet, partition, and outlet are an integrated structure. The guide strip is fixed to the outer surface of the swivel body. The one-way port is installed between two collection layers. The force-bearing blade is fixed to the outer surface of the collection layer. The force-bearing blade has six blades that are evenly distributed in a circle.

[0009] As a further improvement of the present invention, the one-way port is a one-way opening rubber closed port, the guide strip helps the oil scraped off by the rotating body to be better thrown out, the collecting layer has a slope to guide the collection and output of the oil, the one-way port is located at the lowest point of the slope of the collecting layer, and the one-way port rotates synchronously with the rotating body.

[0010] As a further improvement of the present invention, the inlet receives oil to drive the force-bearing blade and then discharges it through the outlet. The one-way port throws the oil scraped off by the rotating body to the outside of the collecting layer and discharges it through the outlet. The rotating body has a right-angled trapezoidal cross-section, with the side near the oil cylinder being an inclined surface, which can better scrape off the oil when the rod moves out. The force-bearing blade is driven by the return oil to drive the collecting layer and the rotating body to rotate synchronously.

[0011] As a further improvement of the present invention, the connecting tube of the rod cavity of the oil cylinder forms two ports for diverting and conveying the oil, the bracket is used to fix and support the oil cylinder, the oil separator gasket plays a sealing role for the oil in the oil cylinder, and the oil separation layer has a circular structure.

[0012] As a further improvement of the present invention, the laminate includes a connecting surface, a protective layer, and a reinforcing strip. The connecting surface has two parts fixed to the beginning and end of the protective layer. The reinforcing strip is attached to the surface of the protective layer. The protective layer has four parts evenly distributed in a circle. The protective layer is made of soft rubber material that can stretch.

[0013] As a further improvement of the present invention, one side of the connecting surface is connected to the oil separation layer and the other side is fixed to the rod body. The protective layer expands and contracts according to the movement of the rod body to maintain the state of wrapping the rod body. The protective strip plays a protective role while the protective layer expands and contracts repeatedly. The connecting surface has a circular ring structure and the protective layer is stacked in a wave shape.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Firstly, during the extension of the rod into the cylinder, the oil is diverted to the oil separation layer through a three-way pipe with a one-way valve, driving the rotating body to rotate and scraping and separating the residual oil on the surface of the rod. This effectively prevents hardened pits from forming due to the adhesion of tiny impurities when the rod extends outward, or from bringing them into the system, thereby ensuring the cleanliness of the hydraulic cylinder and the reliability of its operation.

[0016] Secondly, during the movement of the rod, its extended section is fully wrapped and protected by a protective layer, effectively isolating external contaminants from adhering to the surface of the rod, further preventing wear and damage caused by the introduction of impurities, and extending the service life of the hydraulic cylinder.

[0017] Thirdly, the oil separation layer utilizes the system's return oil diversion drive to achieve secondary scraping and recovery of the oil carried on the rod surface, significantly reducing oil leakage, improving hydraulic oil utilization, and keeping the system's surroundings clean. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a hydraulic cylinder fluid pressure actuation system according to the present invention.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of a hydraulic cylinder according to the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a hydraulic cylinder according to the present invention.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of an oil separation layer according to the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of an oil separation layer according to the present invention.

[0023] Figure 6 This is a front view schematic diagram of the cross-sectional structure of an oil separation layer according to the present invention.

[0024] Figure 7 This is a schematic diagram of a stacked structure according to the present invention.

[0025] Figure 8 This is a schematic diagram of a cross-sectional structure of a stacked layer according to the present invention.

[0026] Figure 9 This is a schematic diagram of the cross-sectional structure of a rod according to the present invention.

[0027] In the diagram: Hydraulic pump-1, oil tank-2, relief valve-3, throttle valve-4, directional valve-5, hydraulic cylinder-6, return oil filter-7, cylinder-61, oil separator-62, bracket-63, oil separation layer-64, stack-65, rod-66, sealing ring-67, inlet-41, partition-42, guide strip-43, rotating body-44, outlet-45, collection layer-46, one-way port-47, force-receiving blade-48, central hole-49, connecting surface-51, protective layer-52, protective strip-53. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] Example 1: As shown in the attached document Figure 1 To be continued Figure 6 As shown:

[0030] This invention provides a fluid pressure actuation system for a hydraulic cylinder, the structure of which includes a hydraulic pump 1, an oil tank 2, an overflow valve 3, a throttle valve 4, a directional valve 5, a hydraulic cylinder 6, and a return oil filter 7. The hydraulic pump 1 is connected between the oil tank 2 and the directional valve 5. The overflow valve 3 and the throttle valve 4 are connected to the directional valve 5. The hydraulic cylinder 6 is connected to the directional valve 5 and the return oil filter 7 through a pipe.

[0031] The hydraulic cylinder 6 includes a cylinder 61, an oil separator 62, a bracket 63, an oil separation layer 64, a stack 65, a rod 66, and a sealing ring 67. The oil separator 62 is installed on the inner surface of the cylinder 61, the bracket 63 is supported on the outer surface of the cylinder 61, the sealing ring 67 is integrated with the rod 66, the oil separation layer 64 is fixed to the outer surface of the cylinder 61, the stack 65 connects the oil separation layer 64 and the rod 66 and is movable, and the rod 66 is located inside the cylinder 61.

[0032] The rod 66 passes sequentially through the stack 65, the oil separation layer 64, the cylinder 61, and the oil separator 62. The oil in the rod chamber of the cylinder 61 flows into the oil separation layer 64 while flowing towards the reversing valve 5. The oil separator 62 performs a first-layer scraping of the oil carried by the rod 66, and the oil separation layer 64 performs a second-layer scraping and separation of the remaining oil. The sealing ring 67 is located inside the cylinder 61 and is divided into a rod chamber and a rodless chamber. The stack 65 extends and retracts according to the direction of movement of the rod 66.

[0033] The oil separation layer 64 includes an inlet 41, a partition 42, a guide strip 43, a swivel body 44, an outlet 45, a collection layer 46, a one-way port 47, a force-bearing blade 48, and a central hole 49. The inlet 41, the partition 42, and the outlet 45 are integrated structures. The guide strip 43 is fixed to the outer surface of the swivel body 44. The one-way port 47 is installed between two collection layers 46. The force-bearing blade 48 is fixed to the outer surface of the collection layer 46. There are six force-bearing blades 48 evenly distributed in a circle. There are six one-way ports 47.

[0034] The one-way port 47 is a one-way opening rubber-made closed port. The guide strip 43 helps the oil scraped off by the rotating body 44 to be better thrown out. The collecting layer 46 has a slope to guide the collection and output of the oil. The one-way port 47 is located at the lowest point of the slope of the collecting layer 46. The one-way port 47 rotates synchronously with the rotating body 44. The rod 66 moves within the central hole 49.

[0035] The inlet 41 receives oil to drive the force-bearing blade 48, which then exits through the outlet 45. The one-way port 47 throws the oil scraped off by the rotating body 44 to the outside of the collecting layer 46 and exits through the outlet 45. The rotating body 44 has a right-angled trapezoidal cross-section, with an inclined surface on the side near the cylinder 61, which can better scrape off the oil when the rod 66 moves out. The force-bearing blade 48 is driven by the return oil, causing the collecting layer 46 and the rotating body 44 to rotate synchronously. The guide strip 43 has six strips that are evenly distributed in a circle.

[0036] The connecting pipe of the rod chamber of the hydraulic cylinder 61 forms two ports for diverting and conveying the oil. The bracket 63 is used to fix and support the hydraulic cylinder 61. The oil separator 62 seals the oil in the hydraulic cylinder 61. The oil separation layer 64 has a circular structure. The reversing valve 5 connects the rod chamber and the rodless chamber of the hydraulic cylinder 61 through a pipe.

[0037] The specific usage and function of this embodiment are as follows:

[0038] In this invention, when the directional valve 5 controls the oil flow in and out of the rod chamber and rodless chamber of the hydraulic cylinder 6 through the hydraulic pipeline, the rod 66 moves outward, and the sealing ring 67 isolates the rod chamber and the rodless chamber. The oil is distributed to the directional valve 5 and the oil separation layer 64 through the three-way pipe. A check valve is installed in the pipe to prevent the oil from flowing back into the oil separation layer 64 when the rod chamber is filled. In the oil discharge condition, the oil enters through the inlet 41 and impacts the force-bearing blade 48, driving the collecting layer 46 and the rotating body 4. 4. Rotation: The right-angled trapezoidal slope of the rotating body 44 scrapes away residual oil from the surface of the rod 66. During rotation, the guide strip 43 assists the oil to detach from the rotating body 44 and be thrown onto the surface of the collecting layer 46. Relying on its own slope, the guide port 47 opens in one direction under the action of centrifugal force, discharging the oil to the outside of the collecting layer 46. Finally, the oil flows into the return oil filter 7 through the outlet 45 to complete the return oil, thereby realizing the online oil removal function of the extended rod 66 using the return oil pipeline.

[0039] Example 2: As shown in the attached document Figure 7 To be continued Figure 9 As shown:

[0040] The laminate 65 includes a connecting surface 51, a protective layer 52, and a reinforcing strip 53. The connecting surface 51 has two parts fixed to the beginning and end of the protective layer 52. The reinforcing strip 53 is attached to the surface of the protective layer 52. The protective layer 52 has four parts evenly distributed in a circle. The protective layer 52 is made of soft rubber and can stretch. The reinforcing strip 53 further protects the protective layer 52 from stress.

[0041] The connecting surface 51 is connected to the oil separation layer 64 on one side and fixed to the rod body 66 on the other side. The protective layer 52 expands and contracts according to the movement of the rod body 66, keeping it wrapped around the rod body 66. The protective strip 53 plays a protective role while the protective layer 52 expands and contracts repeatedly. The connecting surface 51 has a circular structure, and the protective layer 52 is stacked in a wave shape.

[0042] The specific usage and function of this embodiment are as follows:

[0043] In this invention, during the movement of the rod 66, the protective layer 52 expands and contracts accordingly with its displacement. The protective strip 53 provides elastic assistance for the frequent expansion and contraction of the protective layer 52 and promotes its return to its original position, effectively preventing the rod 66 from contacting and adhering to small impurities from the outside when it extends out of the cylinder 61, thereby significantly improving the anti-fouling ability and service life of the hydraulic cylinder 6.

[0044] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solutions described in this invention, or by designing similar technical solutions by those skilled in the art under the inspiration of the technical solutions described in this invention, falls within the protection scope of this invention.

Claims

1. A fluid pressure actuation system for a hydraulic cylinder, comprising a hydraulic pump (1), an oil tank (2), an overflow valve (3), a throttle valve (4), a directional valve (5), a hydraulic cylinder (6), and a return oil filter (7), wherein the hydraulic pump (1) is connected between the oil tank (2) and the directional valve (5), the overflow valve (3) and the throttle valve (4) are connected to the directional valve (5), and the hydraulic cylinder (6) is connected to the directional valve (5) and the return oil filter (7) via a pipe body, characterized in that: The hydraulic cylinder (6) includes a cylinder (61), an oil separator (62), a bracket (63), an oil separation layer (64), a stack (65), a rod (66), and a sealing ring (67). The oil separator (62) is installed on the inner surface of the cylinder (61), the bracket (63) is supported on the outer surface of the cylinder (61), the sealing ring (67) is integrated with the rod (66), the oil separation layer (64) is fixed on the outer surface of the cylinder (61), the stack (65) is connected between the oil separation layer (64) and the rod (66) and is movable, and the rod (66) is located inside the cylinder (61). The rod (66) passes through the stack (65), the oil separation layer (64), the oil cylinder (61) and the oil separator (62) in sequence. The oil in the rod chamber of the oil cylinder (61) flows into the oil separation layer (64) at the same time as it flows into the reversing valve (5) for driving. The oil separator (62) scrapes off the oil carried by the rod (66) in the first layer, and the oil separation layer (64) scrapes off the remaining oil in the second layer. The oil separation layer (64) includes an inlet (41), a partition (42), a guide strip (43), a swivel body (44), an outlet (45), a collection layer (46), a one-way port (47), a force-bearing blade (48), and a central hole (49). The inlet (41), the partition (42), and the outlet (45) are an integrated structure. The guide strip (43) is fixed to the outer surface of the swivel body (44). The one-way port (47) is installed between the two collection layers (46). The force-bearing blade (48) is fixed to the outer surface of the collection layer (46). The one-way port (47) is a one-way opening rubber material closed port. The guide strip (43) helps the oil scraped off by the rotating body (44) to be better thrown out. The collecting layer (46) has a slope to guide the collection and output of the oil. The one-way port (47) is located at the lowest point of the slope of the collecting layer (46). The inlet (41) is connected to the oil-driven force-bearing blade (48) and then discharged through the outlet (45). The one-way port (47) throws the oil scraped off by the rotating body (44) to the outside of the collection layer (46) and discharges it through the outlet (45). The rotating body (44) has a right-angled trapezoidal cross section and the side near the oil cylinder (61) is an inclined surface, which can better scrape off the oil when the rod (66) moves out.

2. The fluid pressure actuation system for a hydraulic cylinder according to claim 1, characterized in that: The cylinder (61) has a rod chamber with a connecting tube forming two ports for diverting and conveying oil. The bracket (63) is used to fix and support the cylinder (61). The oil separator (62) seals the oil in the cylinder (61).

3. The fluid pressure actuation system for a hydraulic cylinder according to claim 1, characterized in that: The stack (65) includes a connecting surface (51), a protective layer (52), and a reinforcing strip (53). The connecting surface (51) has two strips fixed to the beginning and end of the protective layer (52). The reinforcing strip (53) is attached to the surface of the protective layer (52). The protective layer (52) has four strips evenly distributed in a circle.

4. The fluid pressure actuation system for a hydraulic cylinder according to claim 3, characterized in that: One side of the connecting surface (51) is connected to the oil separation layer (64), and the other side is fixed to the rod body (66). The protective layer (52) expands and contracts according to the movement of the rod body (66) to keep the rod body (66) wrapped. The protective strip (53) plays a protective role while the protective layer (52) expands and contracts repeatedly.

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