Intelligent anti-overload protection structure of electro-hydraulic linkage actuating mechanism

Abstract

The invention relates to the technical field of overload protection, and discloses an electro-hydraulic linkage actuating mechanism intelligent overload protection structure which comprises a valve body, a shell is fixedly connected to the top of the valve body, a transmission column is fixedly connected to the top of the valve body, the outer wall of the transmission column is movably connected with the shell, a first push rod is fixedly connected to the inner wall of the shell, and a second push rod is fixedly connected to the inner wall of the first push rod. A motor is fixedly connected to the top of the shell, a rail is fixedly connected to the inner wall of the shell, a hydraulic mechanism is arranged, and a double-hydraulic structure is adopted, so that when the oil temperature of a hydraulic rod for controlling a valve body switch is too high, the hydraulic rod for applying external force can be replaced, and compared with a mode of waiting for cooling of hydraulic oil, the hydraulic rod can be replaced more conveniently. And meanwhile, due to the fact that the stressed hydraulic rod changes, the hydraulic rod with too high hydraulic oil can also be cooled, and replacement of the next time is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of overload protection, and in particular to an intelligent anti-overload protection structure of an electro-hydraulic linkage actuator. Background Art

[0002] The electro-hydraulic actuator is a drive device that combines electricity and hydraulic technology. It is mainly composed of an electrical control part and a hydraulic drive part. The electrical control part is responsible for receiving and processing control signals and determining the action instructions of the actuator. For example, according to the signal from the control system, it determines whether to open the valve, close the valve, or adjust it to a specific intermediate position. The hydraulic drive part converts the electrical control signal into actual mechanical action. Through the pressure transmission and control of the hydraulic oil, powerful and precise power output is achieved to drive related equipment or mechanical components.

[0003] The patent application with application number CN201310058959.6 discloses a universal pressure regulating valve with an overload protection device, which prevents the internal parts of the valve from being damaged due to overload in the system and improves safety performance. The universal pressure regulating valve with an overload protection device includes an actuator assembly, an overload protection device, a valve stem assembly, a main spring, a valve cover, a valve body assembly and a center bracket. The actuator assembly is mounted on the top of the valve stem component and connected to the upper end of the center bracket by screws. The lower end of the center bracket is connected to the upper end of the valve cover, and the lower end of the valve cover is connected to the valve body assembly. The main spring is sleeved on the valve cover, the valve stem component is mounted in the valve cover and connected to the valve body assembly, and the overload protection device is mounted on the valve stem component in the center bracket; the overload protection device includes a pre-compression nut, a bushing, a butterfly spring and a washer. The universal pressure regulating valve with an overload protection device has a simple structure, is safe and reliable, and is widely used in pharmaceutical, chemical and other industries.

[0004] When the above-mentioned equipment is in use, due to the long-term use of the valve, the hydraulic oil in the hydraulic rod in the valve will steadily rise due to excessive pressure, and the high-temperature hydraulic oil will damage the parts in the valve. In the existing equipment, when the temperature of the hydraulic oil in the valve is too high, a pressure dispersion method will be adopted to relieve the pressure of the hydraulic rod, and then give the hydraulic oil time to cool down. However, when the hydraulic oil is cooled, the movable rod is fixed and cannot be moved. As a result, the valve cannot be operated normally during the time when the hydraulic oil dissipates heat, which is not conducive to the use of the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent anti-overload protection structure for an electro-hydraulic linkage actuator to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an intelligent anti-overload protection structure of an electro-hydraulic linkage actuator, comprising a valve body, wherein the valve body is a gate-shaped valve, the top of the valve body is fixedly connected to a shell, the top of the valve body is fixedly connected to a transmission column, the outer wall of the transmission column is movably connected to the shell, the inner wall of the shell is fixedly connected to a push rod 1, the top of the shell is fixedly connected to a motor, the inner wall of the shell is fixedly connected to a track, and further comprising: A hydraulic mechanism comprises a base fixedly connected to the inner wall of an outer shell, a hydraulic rod 1 being fixedly connected to the inner wall of the base, a hydraulic rod 2 being also fixedly connected to the inner wall of the base, a connecting pipe being fixedly connected to the top of the hydraulic rod 1, an end of the connecting pipe away from the hydraulic rod 1 being fixedly connected to the hydraulic rod 2, an outer wall of the connecting pipe being fixedly connected to the base, a switching assembly being fixedly connected to the bottom of the hydraulic rod 1, and a driving assembly being fixedly connected to the top of the hydraulic rod 2. The device adopts a dual hydraulic structure, so that when the oil temperature of the hydraulic rod that controls the valve body switch is too high, the hydraulic rod that applies external force can be replaced. Compared with the method of waiting for the hydraulic oil to cool down, the waiting time required is less. At the same time, because the hydraulic rod subjected to force changes, the hydraulic rod with too high hydraulic oil can also be cooled, which is convenient for the next replacement.

[0007] According to the above technical solution, the driving assembly includes a threaded column, the bottom of which is rotatably connected to the base through a bearing, the outer wall of the threaded column is sleeved with a movable plate, the inner wall of the movable plate is threadedly connected to the threaded column, and the top of the hydraulic rod 2 is fixedly connected to the movable plate. By setting up the driving assembly, when the equipment is in a state of replacing the stressed hydraulic rod, the motor and the threaded column will be separated, so that the rotation of the motor cannot change the state of the hydraulic rod, ensuring that when the equipment replaces the stressed hydraulic rod, the state of the hydraulic rod will not change, thereby avoiding the occurrence of faults when switching the stressed hydraulic rod.

[0008] According to the above technical solution, a circular plate 1 is fixedly connected to the top of the threaded column, and a notch is formed at the top of the circular plate 1.

[0009] According to the above technical solution, the inner wall of the shell is rotatably connected to the circular plate 2 through a bearing, the output end of the motor is fixedly connected to the circular plate 2, the bottom of the circular plate 2 is fixedly connected to an elastic component 1, the bottom of the elastic component 1 is fixedly connected to a hollow cylinder, the bottom of the hollow cylinder is fixedly connected to a raised plate, the outer wall of the raised plate is movably connected to the notch, when the raised plate is embedded in the notch, the rotation of the motor can drive the threaded column to rotate, and when the raised plate is pulled out of the notch, the motor cannot drive the threaded column to rotate.

[0010] According to the above technical solution, the outer wall of the hollow cylinder is fixedly connected to a sleeve, the inner wall of the sleeve is rotatably connected to a connecting plate through a bearing, both ends of the connecting plate are fixedly connected to push rods 2, and one end of the two push rods 2 away from the connecting plate is fixedly connected to a connecting head, the inner wall of the outer shell is fixedly connected to the connecting head, the height of the protruding plate is changed by push rods 2, and then whether the motor can drive the threaded column to rotate is controlled.

[0011] According to the above technical solution, the switching component includes a square plate, the bottom of which is fixedly connected to the transmission column. When the hydraulic rod moves, the height of the transmission column will be changed through the switching component, and then the state of the valve body will be changed. The outer wall of the square plate is provided with a sliding groove 1, the inner wall of the sliding groove 1 is movably connected to the track, and the top of the square plate is provided with a sliding groove 2.

[0012] According to the above technical solution, the inner wall of the sliding groove 2 is movably connected with a U-shaped plate, the outer wall of the U-shaped plate is fixedly connected with a baffle, the top of the U-shaped plate is fixedly connected with a moving device, the outer wall of the moving device is movably connected with a slider, and the top of the slider is fixedly connected with a force plate. By setting the force plate, the distance between the stressed hydraulic cylinder and the unstressed hydraulic rod and the switching component is increased to ensure that the other hydraulic rod is in a state of no stress. After the switching is completed, the movable end of the hydraulic rod is embedded in the force plate to avoid the movement of the hydraulic rod and the fall-off of the force plate, thereby ensuring the stable connection of the switching component. The bottom of the hydraulic rod 1 is movably connected to the force plate.

[0013] According to the above technical solution, the top of the square plate is fixedly connected with a push rod three, and the end of the push rod three close to the U-shaped plate is fixedly connected with a ramp plate, the bottom of the ramp plate is movably connected to the square plate, and the inner wall of the U-shaped plate is movably connected to the ramp plate. By moving the ramp plate, the height of the U-shaped plate is controlled, and then whether the force-bearing plate is in contact with the movable end of the hydraulic rod is controlled.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention adopts a dual hydraulic structure by setting a hydraulic mechanism. In this way, when the oil temperature of the hydraulic rod that controls the valve body switch is too high, the hydraulic rod that applies external force can be replaced. Compared with the method of waiting for the hydraulic oil to cool down, the waiting time required is less. At the same time, because the hydraulic rod subjected to force changes, the hydraulic rod with too high hydraulic oil can also be cooled, which is convenient for the next replacement.

[0015] 2. The present invention provides a push rod 1, which can fix the switching assembly when the device replaces the hydraulic rod that applies external force, thereby avoiding the failure of equipment replacement due to the movement of the switching assembly when the hydraulic rod is replaced, ensuring the stability of the equipment when replacing the hydraulic rod and avoiding the occurrence of malfunctions.

[0016] 3. The present invention lowers the height of the contact surface between the device and the hydraulic rod by setting a switching component, thereby preventing the switching component from being stuck under the hydraulic rod or causing impact on the hydraulic rod when the hydraulic rod is replaced, ensuring the stable operation of the equipment and avoiding the occurrence of malfunctions when switching the stressed hydraulic rod.

[0017] 4. The present invention increases the distance between the stressed hydraulic cylinder, the unstressed hydraulic rod and the switching assembly by setting a stress plate, thereby ensuring that the other hydraulic rod is in a stress-free state. After the switching is completed, the movable end of the hydraulic rod is embedded in the stress plate to avoid the movement of the hydraulic rod and the fall-off of the stress plate, thereby ensuring the stable connection of the switching assembly.

[0018] 5. The present invention sets a driving assembly, which separates the motor from the threaded column when the equipment is in a state of replacing the stressed hydraulic rod, so that the rotation of the motor cannot change the state of the hydraulic rod, ensuring that the state of the hydraulic rod will not change when the equipment replaces the stressed hydraulic rod, thereby avoiding the occurrence of malfunctions when switching the stressed hydraulic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the top structure of the present invention; Figure 3 is a schematic diagram of the hydraulic mechanism of the present invention; Figure 4 is a schematic diagram of a drive assembly of the present invention; Figure 5 It is a schematic diagram of the bottom parts of the drive assembly of the present invention; Figure 6 It is a schematic diagram of the top connection of the drive assembly of the present invention; Figure 7 is a schematic diagram of a switching assembly of the present invention; Figure 8 It is a schematic diagram of the bottom parts of the switching assembly of the present invention; Fig. 9 is a schematic diagram of the top connection of the switching assembly of the present invention; In the figure: 1, valve body; 101, housing; 102, motor; 103, push rod 1; 104, transmission column; 105, track; 2, hydraulic mechanism; 201, base; 202, hydraulic rod 1; 203, connecting pipe; 204, hydraulic rod 2; 21, driving assembly; 211, threaded column; 212, movable plate; 213, circular plate 1; 214, notch; 215, circular plate 2; 216, elastic assembly 1; 217, sleeve; 218, hollow cylinder; 219, connecting plate; 2110, push rod 2; 2111, connector; 2112, raised plate; 22, switching assembly; 221, square plate; 222, sliding groove 1; 223, sliding groove 2; 224, push rod 3; 225, ramp plate; 226, U-shaped plate; 227, baffle; 228, moving device; 229, slider; 2210, force plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example 1: See Figure 1-Figure 6 The present invention provides a technical solution: an intelligent anti-overload protection structure of an electro-hydraulic linkage actuator, comprising a valve body 1, a housing 101 is fixedly connected to the top of the valve body 1, a transmission column 104 is fixedly connected to the top of the valve body 1, an outer wall of the transmission column 104 is movably connected to the housing 101, a push rod 103 is fixedly connected to the inner wall of the housing 101, a motor 102 is fixedly connected to the top of the housing 101, and a track 105 is fixedly connected to the inner wall of the housing 101, and further comprising: The hydraulic mechanism 2 includes a base 201 fixedly connected to the inner wall of the housing 101, a hydraulic rod 1 202 is fixedly connected to the inner wall of the base 201, a hydraulic rod 204 is also fixedly connected to the inner wall of the base 201, a connecting pipe 203 is fixedly connected to the top of the hydraulic rod 1 202, an end of the connecting pipe 203 away from the hydraulic rod 1 202 is fixedly connected to the hydraulic rod 2 204, an outer wall of the connecting pipe 203 is fixedly connected to the base 201, a switching component 22 is fixedly connected to the bottom of the hydraulic rod 1 202, and a driving component 21 is fixedly connected to the top of the hydraulic rod 204. When the device adjusts the switch of the valve body 1, the height of the movable end of the hydraulic rod 204 is changed by the driving component 21, and then the hydraulic rod 1 202 is extended downward through the connecting pipe 203. The extension of the hydraulic rod 1 202 drives the switching component 22 to move, and the moving switching component 22 drives the height of the connecting column to move, thereby changing the switch state of the valve body 1.

[0024] The driving assembly 21 includes a threaded column 211, the bottom of which is rotatably connected to the base 201 through a bearing, the outer wall of the threaded column 211 is sleeved with a movable plate 212, the inner wall of the movable plate 212 is threadedly connected to the threaded column 211, the top of the hydraulic rod 204 is fixedly connected to the movable plate 212, the top of the threaded column 211 is fixedly connected to a circular plate 1 213, the top of the circular plate 1 213 is provided with a notch 214, the inner wall of the housing 101 is rotatably connected to a circular plate 215 through a bearing, the output end of the motor 102 is fixedly connected to the circular plate 215, the bottom of the circular plate 215 is fixedly connected to an elastic component 1 216, the bottom of the elastic component 1 216 is fixedly connected to a hollow cylinder 218, the bottom of the hollow cylinder 218 is fixedly connected to a raised plate 2112, the outer wall of the raised plate 2112 is movably connected to the notch 214, and the outer wall of the hollow cylinder 218 is fixedly connected to Sleeve 217, the inner wall of sleeve 217 is rotatably connected with connecting plate 219 through bearing. When the state of valve body 1 needs to be changed, motor 102 is started. The rotation of motor 102 will drive the bottom circular plate 213 to rotate. The rotating circular plate 213 will drive the protruding plate to rotate. Since the protruding plate is embedded in circular plate 215, the rotation of the protruding plate can drive circular plate 215 to rotate. The rotating circular plate 215 will drive the threaded column 211 to rotate. The rotating threaded column 211 drives the height of movable plate 212 to change. The change in the height of movable plate 212 will change the height of the movable end of hydraulic rod 204. Both ends of connecting plate 219 are fixedly connected with push rod 2110. The end of two push rods 2110 away from connecting plate 219 is fixedly connected with connecting head 2111. The inner wall of outer shell 101 is fixedly connected with connecting head 2111.

[0025] The working principle of this embodiment is: before switching the hydraulic rod, first start the push rod 2110 to drive the connecting plate 219 to move upward. The moving connecting plate 219 will drive the protruding plate to be pulled out from the notch 214 through the sleeve 217 and the hollow tube 218. At this time, the rotation of the motor 102 can no longer drive the rotation of the threaded column 211 below. After completing the switching of the stressed hydraulic rod, the push rod 2110 is reset so that the protruding plate 2112 can be re-embedded in the notch 214 of the circular plate.

[0026] Example 2: Based on Example 1, please refer to Figure 7-Figure 9 The switching assembly 22 includes a square plate 221, the bottom of the square plate 221 is fixedly connected to the transmission column 104, the outer wall of the square plate 221 is provided with a sliding groove 222, the inner wall of the sliding groove 222 is movably connected to the track 105, the top of the square plate 221 is provided with a sliding groove 223, the inner wall of the sliding groove 223 is movably connected to a U-shaped plate 226, the outer wall of the U-shaped plate 226 is fixedly connected to a baffle 227, and the top of the U-shaped plate 226 is fixedly connected to the moving device 22 8. The outer wall of the moving device 228 is movably connected with a slider 229, the top of the slider 229 is fixedly connected with a force plate 2210, the bottom of the hydraulic rod 202 is movably connected with the force plate 2210, the top of the square plate 221 is fixedly connected with a push rod 3 224, the end of the push rod 3 224 close to the U-shaped plate 226 is fixedly connected with a ramp plate 225, the bottom of the ramp plate 225 is movably connected with the square plate 221, and the inner wall of the U-shaped plate 226 is movably connected with the ramp plate 225.

[0027] The working principle of this embodiment is as follows: when the hydraulic rod in the equipment needs to be replaced, the push rod 103 is first started to fix the position of the switching component 22. After the switching component 22 is fixed, the push rod 3 224 is started to drive the ramp plate 225 to move backward. At this time, the bottom of the U-shaped plate 226 loses the support of the ramp plate 225, which makes the U-shaped plate 226 move downward under its own weight. The U-shaped plate 226 moving downward drives the moving device 228 and the force plate 2210 to move downward together. At this time, the moving device 228 is started. , driving the force-bearing plate 2210 to move, allowing the force-bearing plate 2210 to move to the bottom of another hydraulic rod 202. After completing the adjustment of the position of the force-bearing plate 2210, start the push rod three 224 again to drive the ramp plate 225 to move to the bottom of the U-shaped plate 226. The ramp plate 225 squeezes the U-shaped plate 226 to move upward, and then drives the force-bearing plate 2210 to stick to the bottom of the hydraulic rod 202 through the moving device 228. After the fitting is completed, the push rod 103 is retracted to complete the switching of the equipment to the force-bearing hydraulic rod.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent anti-overload protection structure of an electro-hydraulic linkage actuator, comprising a valve body (1), the top of the valve body (1) is fixedly connected to a housing (101), the top of the valve body (1) is fixedly connected to a transmission column (104), the outer wall of the transmission column (104) is movably connected to the housing (101), the inner wall of the housing (101) is fixedly connected to a push rod 1 (103), the top of the housing (101) is fixedly connected to a motor (102), and the inner wall of the housing (101) is fixedly connected to a track (105), characterized in that: Also includes: A hydraulic mechanism (2), the hydraulic mechanism (2) comprising a base (201) fixedly connected to the inner wall of a housing (101), a hydraulic rod 1 (202) fixedly connected to the inner wall of the base (201), a hydraulic rod 2 (204) also fixedly connected to the inner wall of the base (201), a connecting pipe (203) fixedly connected to the top of the hydraulic rod 1 (202), an end of the connecting pipe (203) away from the hydraulic rod 1 (202) fixedly connected to the hydraulic rod 2 (204), an outer wall of the connecting pipe (203) fixedly connected to the base (201), a switching assembly (22) fixedly connected to the bottom of the hydraulic rod 1 (202), and a driving assembly (21) fixedly connected to the top of the hydraulic rod 2 (204).

2. According to claim 1, the intelligent anti-overload protection structure of the electro-hydraulic linkage actuator is characterized in that: The driving assembly (21) comprises a threaded column (211), the bottom of the threaded column (211) being rotatably connected to the base (201) via a bearing, the outer wall of the threaded column (211) being sleeved with a movable plate (212), the inner wall of the movable plate (212) being threadedly connected to the threaded column (211), and the top of the second hydraulic rod (204) being fixedly connected to the movable plate (212).

3. The intelligent anti-overload protection structure of an electro-hydraulic linkage actuator according to claim 2 is characterized in that: A circular plate 1 (213) is fixedly connected to the top of the threaded column (211), and a notch (214) is provided on the top of the circular plate 1 (213).

4. The intelligent anti-overload protection structure of the electro-hydraulic linkage actuator according to claim 3 is characterized in that: The inner wall of the housing (101) is rotatably connected to a second circular plate (215) via a bearing, the output end of the motor (102) is fixedly connected to the second circular plate (215), the bottom of the second circular plate (215) is fixedly connected to an elastic component (216), the bottom of the elastic component (216) is fixedly connected to a hollow cylinder (218), the bottom of the hollow cylinder (218) is fixedly connected to a raised plate (2112), and the outer wall of the raised plate (2112) is movably connected to the notch (214).

5. The intelligent anti-overload protection structure of an electro-hydraulic linkage actuator according to claim 4 is characterized in that: The outer wall of the hollow cylinder (218) is fixedly connected to a sleeve (217), the inner wall of the sleeve (217) is rotatably connected to a connecting plate (219) via a bearing, both ends of the connecting plate (219) are fixedly connected to push rods 2 (2110), one end of the two push rods 2 (2110) away from the connecting plate (219) is fixedly connected to a connecting head (2111), and the inner wall of the housing (101) is fixedly connected to the connecting head (2111).

6. The intelligent anti-overload protection structure of the electro-hydraulic linkage actuator according to claim 5 is characterized in that: The switching assembly (22) comprises a square plate (221), the bottom of the square plate (221) is fixedly connected to the transmission column (104), the outer wall of the square plate (221) is provided with a sliding groove 1 (222), the inner wall of the sliding groove 1 (222) is movably connected to the track (105), and the top of the square plate (221) is provided with a sliding groove 2 (223).

7. The intelligent anti-overload protection structure of an electro-hydraulic linkage actuator according to claim 6 is characterized in that: The inner wall of the second sliding groove (223) is movably connected to a U-shaped plate (226), the outer wall of the U-shaped plate (226) is fixedly connected to a baffle (227), the top of the U-shaped plate (226) is fixedly connected to a moving device (228), the outer wall of the moving device (228) is movably connected to a slider (229), the top of the slider (229) is fixedly connected to a force-bearing plate (2210), and the bottom of the first hydraulic rod (202) is movably connected to the force-bearing plate (2210).

8. The intelligent anti-overload protection structure of the electro-hydraulic linkage actuator according to claim 7 is characterized in that: The top of the square plate (221) is fixedly connected to a push rod three (224), one end of the push rod three (224) close to the U-shaped plate (226) is fixedly connected to a ramp plate (225), the bottom of the ramp plate (225) is movably connected to the square plate (221), and the inner wall of the U-shaped plate (226) is movably connected to the ramp plate (225).

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