Electro-hydraulic actuator manual operation device with double-speed switching function

Abstract

The utility model discloses an electro-hydraulic actuator manual operation device with a double-speed switching function, which comprises a valve block, a valve core arranged in the valve block, an oil cylinder arranged in the valve block, a piston rod arranged in the oil cylinder, a rocker arranged at one end of the piston rod, and a mode switching pin arranged between the rocker and the piston rod. An oil pressing cavity and an oil outlet cavity are formed in the oil cylinder, an oil suction pipe is arranged at one end of the oil cylinder, an oil tank is arranged at the end, away from the oil cylinder, of the oil suction pipe, a sealing steel ball is arranged between the oil cylinder and the oil suction pipe, and a steel ball reset spring is arranged on one side of the sealing steel ball. According to the utility model, the operation speed can be rapidly switched and the structure is simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of manual operation device of electro-hydraulic actuator, especially to a manual operation device of electro-hydraulic actuator with double-speed switching. BACKGROUND

[0002] The manual operation device of electro-hydraulic actuator is widely used in various industrial control occasions, especially in fluid control systems requiring high precision and stability. The traditional manual operation device of electro-hydraulic actuator mainly relies on electric drive and manual operation, among which manual operation is mainly used for quick adjustment of the system in emergency situations. Such devices are usually integrated in complex mechanical equipment, such as oil extraction equipment, chemical production devices, etc., and their reliability and stability directly affect the normal operation of the entire system.

[0003] Currently, to realize the manual operation function of electro-hydraulic actuator, common solutions include using manual pumps, manual reversing valves, handles, etc. Specifically, the manual pump drives the hydraulic oil into the oil cylinder by human power to push the piston rod to move; the manual reversing valve changes the direction of the oil circuit to realize the extension and retraction of the oil cylinder; the handle is used to directly operate the valve core to control the on-off of the oil circuit. In addition, some designs use rocker and lever structures to achieve the reciprocating motion of the oil cylinder through simple mechanical transmission. Although these methods can basically meet the demand of manual operation, there are some deficiencies in actual application. Therefore, how to design a manual operation device of electro-hydraulic actuator that can quickly switch the operation speed and has a simple structure has become a technical problem to be solved. SUMMARY

[0004] The present application provides a manual operation device of electro-hydraulic actuator with double-speed switching, which can quickly switch the operation speed and has a simple structure.

[0005] The present application provides a manual operation device of electro-hydraulic actuator with double-speed switching, which adopts the following technical solution:

[0006] A manual operation device of electro-hydraulic actuator with double-speed switching, comprising a valve block, a valve core is arranged in the valve block, an oil cylinder is arranged in the valve block, a piston rod is arranged in the oil cylinder, a rocker is arranged at one end of the piston rod, a mode switching pin is arranged between the rocker and the piston rod, a pressure oil cavity and an oil outlet cavity are arranged in the oil cylinder, a suction pipe is arranged at one end of the oil cylinder, an oil tank is arranged at the end of the suction pipe away from the oil cylinder, a sealing steel ball is arranged between the oil cylinder and the suction pipe, and a steel ball return spring is arranged on one side of the sealing steel ball.

[0007] By adopting the technical scheme, the manual operating device of the electro-hydraulic actuator with double-speed switching is designed, the mode switching pin between the rocker and the piston rod is designed, so that the operator can select different working speeds by simply changing the position of the mode switching pin, thereby adapting to different operation requirements.

[0008] Preferably, the oil cylinder is connected to the valve block through threads, and external sealing is realized through an oil cylinder sealing ring.

[0009] By adopting the technical scheme, when in use, the oil cylinder is connected to the valve block through threads, and external sealing is realized through an oil cylinder sealing ring, the sealing performance of the device is improved, hydraulic oil leakage is prevented, and the stability and reliability of the system are ensured.

[0010] Preferably, one end of the oil cylinder is threadedly connected with an oil cylinder end cover, the outer side of the oil cylinder end cover is provided with an oil cylinder end cover sealing ring, the outer side of the oil suction pipe is provided with a sleeve joint, and the oil suction pipe is installed on the oil cylinder end cover through the sleeve joint.

[0011] By adopting the technical scheme, when in use, one end of the oil cylinder is threadedly connected with an oil cylinder end cover, the stability and reliability of the oil cylinder structure are improved, the oil cylinder end cover sealing ring arranged on the outer side of the oil cylinder end cover effectively prevents external impurities from entering the oil cylinder, the sealing performance of the system is improved, the sleeve joint arranged on the outer side of the oil suction pipe makes installation more convenient, the connection tightness between the oil suction pipe and the oil cylinder end cover is ensured, and the stability and reliability of the entire device are further improved.

[0012] Preferably, one end of the piston rod arranged in the oil cylinder is provided with a piston rod end cover, and the piston rod end cover is provided with a piston rod end cover sealing ring.

[0013] By adopting the technical scheme, when in use, the piston rod end cover sealing ring on the piston rod end cover can effectively prevent hydraulic oil from leaking from the gap between the piston rod and the oil cylinder, the sealing performance of the system is improved, and the manual operating device of the electro-hydraulic actuator can maintain stable performance during the working process.

[0014] Preferably, a valve core is arranged in the valve block, the valve core is provided with a valve core return spring, when the operation mode switching pin is in the first position, the valve core return spring pushes the valve core to move upward, so that the oil suction cavity and the oil pressing cavity are communicated, and when the operation mode switching pin is in the second position, the valve core return spring is compressed, and the valve core moves downward, so that the oil suction cavity and the oil pressing cavity are isolated.

[0015] By adopting the technical scheme, when in use, the manual operating device of the electro-hydraulic actuator is switched between the two working modes smoothly.

[0016] Preferably, the outer side of the valve core is provided with a valve core sealing ring for realizing the external sealing of the valve core.

[0017] By adopting the technical scheme, the outer side of the valve core is provided with a valve core sealing ring to realize the external sealing of the valve core, effectively prevent the hydraulic oil from leaking, and improve the reliability and safety of the system.

[0018] Preferably, the sealing steel ball is provided with a guide hole, and a steel ball return spring is installed in the guide hole for lifting the sealing steel ball when oil is sucked to allow the hydraulic oil to enter the oil suction cavity, and pressing the sealing steel ball back to realize sealing when oil is pressed.

[0019] By adopting the technical scheme, the sealing steel ball is provided with a guide hole, and a steel ball return spring is installed in the guide hole to effectively lift the sealing steel ball during the oil suction process, ensure the hydraulic oil to enter the oil suction cavity smoothly, and improve the oil suction efficiency; during the oil pressing process, the steel ball return spring can quickly press the sealing steel ball back to the original position to realize good sealing effect, prevent the hydraulic oil from leaking, and ensure the stability and reliability of the system.

[0020] Preferably, the valve block is provided with a fixing groove, and a hinged plate is arranged in the fixing groove and hinged with the valve block and the rocker respectively.

[0021] By adopting the technical scheme, the design of the fixing groove and the hinged plate on the valve block makes the connection between the rocker and the valve block more stable and reliable, and improves the stability and operation precision of the entire manual operating device. Specifically, the arrangement of the hinged plate can effectively reduce the looseness caused by external vibration or impact, ensure that the rocker can accurately transmit torque in different operating modes, and realize the stable operation of the double-speed switching function.

[0022] In summary, the present application has the following beneficial effects:

[0023] 1. The utility model discloses a manual operating device of electro-hydraulic actuator with double-speed switching, which is capable of realizing double-speed switching in the manual operation process through the mode switching pin, improving the operation flexibility, and quickly responding in an emergency and ensuring the operation accuracy in fine adjustment.

[0024] 2. The utility model discloses a manual operating device of electro-hydraulic actuator with double-speed switching, which is capable of realizing double-speed switching in the manual operation process through the mode switching pin, improving the operation flexibility, and quickly responding in an emergency and ensuring the operation accuracy in fine adjustment.

[0025] 3. The utility model discloses a manual operating device of electro-hydraulic actuator with double-speed switching, which is capable of realizing double-speed switching in the manual operation process through the mode switching pin, improving the operation flexibility, and quickly responding in an emergency and ensuring the operation accuracy in fine adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the embodiment.

[0027] Figure 2 It is a sectional view of the embodiment.

[0028] Figure 3 It is Figure 2 An enlarged schematic view of part of the structure.

[0029] BRIEF DESCRIPTION OF DRAWINGS 1, valve block;2, valve core;3, oil cylinder;4, piston rod;5, rocker;6, mode switching pin;7, oil cavity;8, oil outlet cavity;9, oil suction pipe;10, oil tank;11, sealing steel ball;12, steel ball reset spring;13, oil cylinder sealing ring;14, oil cylinder end cover;15, oil cylinder end cover sealing ring;16, clamping sleeve joint;17, piston rod end cover;18, piston rod end cover sealing ring;19, valve core reset spring;20, valve core sealing ring;21, fixed groove;22, hinged plate. DETAILED DESCRIPTION

[0030] The utility model makes further detailed description in combination with the drawings. Same parts are indicated with same reference numerals. It should be noted that the words "front", "back", "left", "right", "up", "down", "bottom surface" and "top surface" in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a specific part.

[0031] The utility model discloses a kind of manual operating device of electro-hydraulic actuator with double-speed switching, as shown in Figures 1 to 3As shown, including valve block 1, valve block 1 is the basic component of the whole device, internally provided with valve core 2 and oil cylinder 3, oil cylinder 3 is provided with oil cavity 7 and oil cavity 8, valve block 1 can be made of cast iron or aluminum alloy to ensure its strength and corrosion resistance. Valve core 2 is located inside the valve block 1, responsible for controlling the on-off of the oil circuit. Valve core 2 is provided with valve core 2 return spring, when the mode switching pin 6 is in the first position, the valve core 2 return spring pushes the valve core 2 to move upward, so that the oil suction cavity and the oil cavity 7 are communicated; When the mode switching pin 6 is in the second position, the valve core 2 return spring is compressed, the valve core 2 moves downward, so that the oil suction cavity and the oil cavity 7 are isolated. The outer side of the valve core 2 is also provided with valve core 2 sealing ring, which is used to prevent oil leakage.

[0032] Oil cylinder 3 is connected to valve block 1 by thread, and is sealed to the outside by oil cylinder 3 sealing ring. Oil cylinder 3 is provided with piston rod 4. One end of piston rod 4 is provided with piston rod 4 end cover. Piston rod 4 end cover is provided with piston rod 4 end cover sealing ring. One end of oil cylinder 3 is provided with oil cylinder 3 end cover. The outer side of oil cylinder 3 end cover is provided with oil cylinder 3 end cover sealing ring to prevent oil leakage. One end of piston rod 4 is provided with rocker 5. Rocker 5 is the part manually operated by the operator. Mode switching pin 6 is provided between piston rod 4 and rocker 5. Mode switching pin 6 is used to switch two different operating modes to realize the switching of different speeds. Mode switching pin 6 can be made of stainless steel to increase its wear resistance and corrosion resistance. Valve block 1 is provided with fixed groove 21. Fixed groove 21 is provided with hinged plate 22. Hinged plate 22 is hinged with valve block 1 and rocker 5 respectively. Fixed groove 21 can be made of cast iron or stainless steel to increase its strength and corrosion resistance. Hinged plate 22 can be made of stainless steel or aluminum alloy, and the surface is treated by zinc plating to increase its wear resistance and corrosion resistance.

[0033] One end of oil cylinder 3 is provided with oil suction pipe 9. Oil suction pipe 9 is an important part connecting oil cylinder 3 and oil tank 10. One end of oil suction pipe 9 away from oil cylinder 3 is provided with oil tank 10. The outer side of oil suction pipe 9 is provided with clamp joint 16, which is installed on the end cover of oil cylinder 3 through clamp joint 16. Oil suction pipe 9 can be made of stainless steel or copper to ensure its corrosion resistance and service life. Sealing steel ball 11 is provided between oil cylinder 3 and oil suction pipe 9. One side of sealing steel ball 11 is provided with steel ball return spring 12. Sealing steel ball 11 is provided with a guide hole. Steel ball return spring 12 is installed in the guide hole, which is used to lift sealing steel ball 11 when oil is sucked, allowing hydraulic oil to enter the oil suction cavity, and pressing sealing steel ball 11 back when oil is pressed to realize sealing.

[0034] The first mode: the switching pin is on the right side, the valve core 2 is lifted, the oil suction cavity and the oil pressing cavity 7 are communicated, when the piston rod 4 moves upwards, the oil in the oil pressing cavity 7 flows to the oil suction cavity, but the volume of the oil pressing cavity 7 is smaller than that of the oil suction cavity, the oil suction cavity generates negative pressure, the sealing steel ball 11 is lifted under the action of atmospheric pressure, the hydraulic oil in the oil tank 10 enters the oil suction cavity, the oil suction function is realized, when the piston rod 4 moves downwards, the sealing steel ball 11 moves downwards to realize the sealing of the end cover of the oil cylinder 3, the hydraulic oil enters the oil pressing cavity 7 under the pressure, but the volume of the oil pressing cavity 7 is smaller than that of the oil suction cavity, the excessive hydraulic oil enters the actuator oil cylinder 3 to drive the valve to move under the action of pressure. The mode is used in the actual working condition that the torque is large and the speed is slow in 0%~5% stroke of the valve opening.

[0035] The second mode: the switching pin is on the left side, the valve core 2 is lowered under the action of the spring force, the oil suction cavity and the oil pressing cavity 7 are isolated. When the piston rod 4 moves upwards, the oil suction cavity generates negative pressure, the sealing steel ball 11 is lifted under the action of atmospheric pressure, the hydraulic oil in the oil tank 10 enters the oil suction cavity, the oil suction function is realized, and the oil in the oil pressing cavity 7 enters the actuator oil cylinder 3 to drive the valve to move. When the piston rod 4 moves downwards, the sealing steel ball 11 moves downwards to realize the sealing of the end cover of the oil cylinder 3, the hydraulic oil pushes open the valve core 2 under the pressure and enters the oil pressing cavity, but the volume of the oil pressing cavity 7 is smaller than that of the oil suction cavity, the excessive hydraulic oil enters the actuator oil cylinder 3 to drive the valve to move under the action of pressure. The mode is used in the actual working condition that the torque is small and the speed is fast in 10%~100% stroke of the valve opening, the first mode and the second mode are combined to be used, and the maximum balance of operation time and operation labor can be realized in the whole stroke process of the driven valve.

[0036] Working principle: the manual operation device of the electro-hydraulic actuator with double-speed switching is designed, the switching of the mode switching pin 6 can realize two different speed manual operation modes. When the mode switching pin 6 is in the first position, the valve core 2 reset spring pushes the valve core 2 to move upwards, so that the oil suction cavity and the oil pressing cavity 7 are communicated, at this time, the rocker 5 drives the piston rod 4 to move slowly, and is suitable for low-frequency operation. When the mode switching pin 6 is in the second position, the valve core 2 reset spring is compressed, the valve core 2 moves downwards, so that the oil suction cavity and the oil pressing cavity 7 are isolated, at this time, the rocker 5 drives the piston rod 4 to move quickly, and is suitable for high-frequency operation.

[0037] The above are preferred embodiments of the present application, and are not used to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. An electro-hydraulic actuator hand operated device with dual speed switching, characterized by: The utility model provides a valve block (1) is provided with valve core (2) in it, oil cylinder (3) is provided with in it, piston rod (4) is provided with in oil cylinder (3), one end of piston rod (4) is provided with rocker (5), mode switching pin (6) is provided between rocker (5) and piston rod (4), oil cylinder (3) is provided with pressure oil cavity (7) and oil outlet cavity (8) in it, one end of oil cylinder (3) is provided with oil suction pipe (9), oil tank (10) is provided at the end of oil suction pipe (9) away from oil cylinder (3), sealing steel ball (11) is provided between oil cylinder (3) and oil suction pipe (9), one side of sealing steel ball (11) is provided with steel ball reset spring (12).

2. An electro-hydraulic actuator hand operating device with dual speed switching according to claim 1, characterized in that: The oil cylinder (3) is connected to the valve block (1) by screwing, and is sealed externally by the oil cylinder (3) sealing ring.

3. An electro-hydraulic actuator hand operating device with dual speed switching as claimed in claim 1, wherein: One end of the oil cylinder (3) is connected with the oil cylinder (3) end cover, the outer side of the oil cylinder (3) end cover is provided with the oil cylinder (3) end cover sealing ring, the outer side of the oil suction pipe (9) is provided with the sleeve joint (16), and the oil suction pipe (9) is installed on the oil cylinder (3) end cover through the sleeve joint (16).

4. An electro-hydraulic actuator hand operating device with dual speed switching as claimed in claim 1, characterized in that: One end of the piston rod (4) provided in the oil cylinder (3) is provided with the piston rod (4) end cover, and the piston rod (4) end cover is provided with the piston rod (4) end cover sealing ring.

5. An electro-hydraulic actuator hand operating device with dual speed switching as claimed in claim 1, wherein: The valve core (2) is provided with a valve core (2) reset spring, when the operation mode switching pin (6) is in the first position, the valve core (2) reset spring pushes the valve core (2) to move upward, so that the oil suction cavity and the pressure oil cavity (7) are communicated, when the operation mode switching pin (6) is in the second position, the valve core (2) reset spring is compressed, and the valve core (2) moves downward, so that the oil suction cavity and the pressure oil cavity (7) are isolated.

6. An electro-hydraulic actuator hand operated device with dual speed switching as claimed in claim 1, wherein: The outer side of the valve core (2) is provided with a valve core (2) sealing ring, which is used for external sealing of the valve core (2).

7. An electro-hydraulic actuator hand operated device with dual speed switching as claimed in claim 1, wherein: The sealing steel ball (11) is provided with a guide hole, and the steel ball reset spring (12) is installed in the guide hole, which is used for lifting the sealing steel ball (11) when sucking oil, allowing hydraulic oil to enter the oil suction cavity, and pressing the sealing steel ball (11) back when pressing oil, so as to realize sealing.

8. An electro-hydraulic actuator hand operating device with dual speed switching as claimed in claim 1, characterized in that: The valve block (1) is provided with a fixing groove (21), the fixing groove (21) is provided with a hinged plate (22), and the hinged plate (22) is hinged with the valve block and the rocker (5) respectively.

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