Hydraulic angular travel executing mechanism

Abstract

The utility model provides a hydraulic angular travel actuating mechanism, which relates to the field of hydraulic angular travel actuating mechanisms and comprises a shell, a slider is arranged in the shell, a guide rod penetrates through the slider in a sliding manner, the upper end of the slider is connected with a guide block, and the outer wall of the guide block is connected with a ball. Hydraulic cylinders are symmetrically connected to the outer side of the sliding block, a shifting fork rod is connected to the lower end of the sliding block, a telescopic rod is connected to the lower end of the shifting fork rod, a limiting assembly is connected to the bottom of the shell and comprises a threaded barrel, a silica gel column is movably connected to the interior of the threaded barrel, and meanwhile a threaded rod is connected to the lower end of the silica gel column; and the threaded rod is in threaded connection with the interior of the threaded cylinder. The angular travel hydraulic actuating mechanism solves the problems that internal parts of an existing angular travel hydraulic actuating mechanism are not easy to replace after being abraded, and the actuating action is slow due to friction between the internal parts of a shell.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic angular stroke actuators, in particular to a hydraulic angular stroke actuator. Background Art

[0002] Rotary actuators are devices used to control valves from 0 to 90 degrees, primarily for controlling ball valves, plug valves, butterfly valves, and shutter valves. The actuator receives a control signal from a regulator and converts it into a corresponding angular displacement, which controls the valve to adjust flow. Industrial automation control requires valves to respond quickly, closing or opening quickly to achieve rapid and effective control of the medium they control, meeting the needs of process control conditions.

[0003] After searching, the prior art (publication number: CN211550704U) records "an angular stroke hydraulic actuator, in which a fork shaft hinged to the housing is provided in the housing, hydraulic cylinders are symmetrically arranged at both ends of the housing, and sliders are provided at the ends of the hydraulic rods of the hydraulic cylinders. The sliders are mounted on the fixed rods in the housing, and the sliders cooperate with the forks on the fork shafts to control the rotation of the fork shafts. The sliders are fixed with a bidirectional hydraulic buffer, and the length of the impacted head extending out of the slider is about 20 mm; buffer springs are respectively mounted on both ends of the fixed rods, and the buffer springs are fixed to the end face of the housing through an annular spring seat, and the wire diameter of the buffer springs changes from thin to thick. The utility model reduces the impact by arranging a bidirectional hydraulic buffer on the slider and by mounting buffer springs on both ends of the fixed rod, thereby achieving buffering protection for the pneumatic actuator and the valve it drives, so that the pneumatic actuator can meet the requirements of fast opening or fast closing without damaging the limit adjustment mechanism in the housing, thereby maximizing the reliability and service life of the product."

[0004] Although the angular stroke hydraulic actuator in the prior art has achieved improved reliability and service life, it still has some shortcomings: the silicone sleeve on the limit screw involved in the existing angular stroke hydraulic actuator still wears out and is consumed after long-term use, and the wear is not convenient for long-term replacement. Secondly, there is direct sliding friction between the slider and the housing, and between the slider and the fixed rod, which causes the friction force to affect the actuator's movement speed. Utility Model Content

[0005] In order to overcome the defects of the existing technology, a hydraulic angular stroke actuator is now provided to solve the problems of the existing angular stroke hydraulic actuator in which internal parts are difficult to replace after wear and friction between internal parts of the shell causes slow execution.

[0006] To achieve the above-mentioned purpose, a hydraulic angular stroke actuator is provided, including: a shell, a slider is provided inside the shell, and a guide rod is slidably passed through the inside of the slider, and the upper end of the slider is connected to a guide block, and the outer wall of the guide block is connected to a ball bearing, the outer side of the slider is symmetrically connected to a hydraulic cylinder, and the lower end of the slider is connected to a fork rod, and the lower end of the fork rod is connected to a telescopic rod, the bottom of the shell is connected to a limiting assembly, and the limiting assembly includes a threaded barrel, and a silicone column is movably connected to the inside of the threaded barrel, and the lower end of the silicone column is connected to a threaded rod, and the threaded rod is screwed into the inside of the threaded barrel.

[0007] Furthermore, an oil tank is provided at the upper end of the shell, and the hydraulic cylinder is symmetrically installed on the outer walls of both sides of the shell, and the oil tank is connected to the hydraulic cylinder through an oil pipe.

[0008] Furthermore, the inner wall of the shell is symmetrically provided with damping shock absorbers, and the damping shock absorbers are placed on both sides of the slider. At the same time, the damping shock absorbers are located on the upper side of the guide rod, and springs are sleeved on both ends of the guide rod.

[0009] Furthermore, the guide block is slidably connected to the guide groove opened on the top inner wall of the shell, and a linear ball bearing that passes through the slider is embedded inside the slider, and the guide rod is slidably inserted in the linear ball bearing, and connection holes are opened on the inner walls on both sides of the slider.

[0010] Furthermore, the shift fork rod is hinged to the bottom of the slider, and the lower end of the telescopic rod is connected to a shaft sleeve, and the interior of the shaft sleeve is connected to the shift fork shaft.

[0011] Furthermore, the limiting assembly is symmetrically arranged about the fork axis, and the outer wall of the threaded barrel is provided with a thread, and the outer wall of the threaded barrel is screwed with a first locking nut.

[0012] Furthermore, a sealing block with a conical structure is provided at the upper end of the threaded cylinder, and the silicone column is slidably connected to the inside of the sealing block, while the upper end of the silicone column protrudes from the sealing block.

[0013] Furthermore, a piston block is slidably connected inside the threaded barrel, and the piston block is connected to the upper end of the threaded rod, and the lower end of the threaded rod is located outside the threaded barrel, and a second locking nut is screwed on the outside of the threaded rod.

[0014] The beneficial effects of the present invention are:

[0015] 1. During use, the cylinder on one side of the housing drives the slider to move linearly inside the housing, thereby driving the fork rod to rotate, so that it contacts the silicone column on one side to achieve stroke limit. When the top of the silicone column is worn, the angular stroke of the fork rod deviates. At this time, you only need to loosen the second locking nut and then rotate the threaded rod to push the silicone column outward from the threaded barrel. This allows the silicone column set long distances inside the threaded barrel to maintain a longer service life, eliminating the trouble of replacement.

[0016] 2. The damping shock absorber and the spring on the outside of the guide rod are used to achieve a buffering effect on both sides of the slider, thereby protecting the limit assembly and reducing the impact force of the internal structure. At the same time, the guide block on the upper end of the slider and the ball on its outside are used to achieve rolling contact between the upper end of the slider and the inner wall of the shell, and the linear ball bearing inside the slider is used to achieve a rolling connection between the slider and the guide rod, thereby reducing the wear and friction between the internal components and enhancing the agility of the execution of the action. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall front cross-section structure of an embodiment of the present utility model.

[0018] Figure 2 For the embodiment of the utility model Figure 1 Schematic diagram of the structure at point A in the middle.

[0019] Figure 3 For the embodiment of the utility model Figure 1 Schematic diagram of the structure at point B in the middle.

[0020] Figure 4 This is a schematic diagram of the slider structure of an embodiment of the present utility model.

[0021] In the figure: 1. Housing; 2. Slider; 21. Guide block; 22. Linear ball bearing; 23. Connecting hole; 24. Fork rod; 25. Telescopic rod; 26. Bushing; 27. Fork shaft; 3. Limiting assembly; 31. Silicone column; 32. Sealing block; 33. Threaded cylinder; 34. Piston block; 35. First locking nut; 36. Threaded rod; 37. Second locking nut; 4. Hydraulic cylinder; 5. Guide rod; 6. Spring; 7. Damping shock absorber; 8. Fuel tank. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Reference Figures 1 to 4 As shown, the utility model provides a hydraulic angular stroke actuator, including: a shell 1, a slider 2 is provided inside the shell 1, and a guide rod 5 is slidably passed through the inside of the slider 2, and the upper end of the slider 2 is connected to a guide block 21, and the outer wall of the guide block 21 is connected to a ball bearing, the outer side of the slider 2 is symmetrically connected to a hydraulic cylinder 4, and the lower end of the slider 2 is connected to a fork rod 24, and the lower end of the fork rod 24 is connected to a telescopic rod 25, the bottom of the shell 1 is connected to a limiting component 3, and the limiting component 3 includes a threaded barrel 33, and the threaded barrel 33 is movably connected to a silicone column 31, and the lower end of the silicone column 31 is connected to a threaded rod 36, and the threaded rod 36 is screwed into the inside of the threaded barrel 33.

[0024] like Figure 1 As shown, an oil tank 8 is provided at the upper end of the shell 1, and the hydraulic cylinder 4 is symmetrically installed on the outer walls of both sides of the shell 1, and the oil tank 8 is connected to the hydraulic cylinder 4 through an oil pipe. The inner wall of the shell 1 is symmetrically provided with a damping shock absorber 7, and the damping shock absorber 7 is placed on both sides of the slider 2. At the same time, the damping shock absorber 7 is located on the upper side of the guide rod 5, and springs 6 are sleeved on both ends of the guide rod 5.

[0025] Specifically, a pipeline and a delivery pump are connected between the oil tank 8 and the hydraulic cylinder 4 , and a valve is used to control the hydraulic cylinder 4 on one side to be in a compressed state while the other hydraulic cylinder 4 is in a stretched state.

[0026] like Figure 3 and Figure 4 As shown, the guide block 21 is slidably connected to the guide groove opened on the top inner wall of the housing 1, and a linear ball bearing 22 is embedded in the slider 2 and passes through the slider 2, and the guide rod 5 is slidably inserted in the linear ball bearing 22. At the same time, connecting holes 23 are opened on the inner walls on both sides of the slider 2, the fork rod 24 is hinged to the bottom of the slider 2, and the lower end of the telescopic rod 25 is connected to the sleeve 26, and the sleeve 26 is internally connected to the fork shaft 27.

[0027] Specifically, the front and rear sides of the slider 2 do not contact the inner wall of the housing 1 , and the slider 2 is configured as a rectangular block structure as a whole.

[0028] Specifically, both ends of the fork shaft 27 are rotatably connected to the shell 1, and one end is rotatably extended to the outside of the shell 1, and then the fork shaft 27 is fixedly connected to the sleeve 26, so that when the fork shaft 27 is driven to rotate, one end of the fork shaft 27 can be connected to the external valve stem to achieve the air opening and closing effect of the valve.

[0029] like Figure 1 and Figure 2As shown, the limit assembly 3 is symmetrically arranged about the fork shaft 27, and the outer wall of the threaded barrel 33 is provided with a thread, and the outer wall of the threaded barrel 33 is screwed with a first locking nut 35, the upper end of the threaded barrel 33 is provided with a sealing block 32 with a conical structure, and the silicone column 31 is slidably connected to the inside of the sealing block 32, and the upper end of the silicone column 31 protrudes from the sealing block 32, the inside of the threaded barrel 33 is slidably connected with a piston block 34, and the piston block 34 is connected to the upper end of the threaded rod 36, and the lower end of the threaded rod 36 is located on the outside of the threaded barrel 33, and the second locking nut 37 is screwed on the outside of the threaded rod 36.

[0030] Specifically, when adjusting the limit height, the first locking nut 35 is loosened, and then the threaded barrel 33 is rotated to adjust the length of the insertion into the shell 1, and then the first locking nut 35 is locked at the bottom of the shell 1 again.

[0031] It should be noted that when adjusting the limit height, it is not possible to simply adjust the length of the silicone column 31 extending out of the threaded barrel 33 to avoid bending and deformation of the silicone column 31 after a collision. Therefore, the positioning effect of the silicone column 31 is achieved through the metal sealing block 32, leaving only an appropriate distance protruding from the outside of the threaded barrel 33.

[0032] During use, the cylinder on one side of the shell drives the slider to move in a straight line inside the shell, thereby driving the fork rod to rotate, so that it contacts the silicone column on one side to achieve stroke limitation. When the top of the silicone column is worn, the angular stroke of the fork rod deviates. At this time, you only need to loosen the second locking nut and then rotate the threaded rod to push the silicone column outward from the threaded barrel. In this way, the silicone column set at a long distance inside the threaded barrel can maintain a longer service life, eliminating the trouble of replacement.

[0033] The hydraulic angular stroke actuator of the utility model can effectively solve the problems of existing angular stroke hydraulic actuators, such as internal parts being difficult to replace after wear, and friction between internal parts of the shell causing slow execution. It extends the service life of internal vulnerable parts on the basis of existing hydraulic angular stroke actuator technology, facilitates the adjustment of the limit angular stroke, and reduces the friction between parts.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic angular stroke actuator, comprising: The shell (1) is characterized in that: a slider (2) is provided inside the shell (1), and a guide rod (5) is slidably passed through the inside of the slider (2), and the upper end of the slider (2) is connected to a guide block (21), and the outer wall of the guide block (21) is connected to a ball bearing, the outer side of the slider (2) is symmetrically connected to a hydraulic cylinder (4), and the lower end of the slider (2) is connected to a shift fork rod (24), and the lower end of the shift fork rod (24) is connected to a telescopic rod (25), the bottom of the shell (1) is connected to a limit assembly (3), and the limit assembly (3) includes a threaded barrel (33), and a silicone column (31) is movably connected inside the threaded barrel (33), and the lower end of the silicone column (31) is connected to a threaded rod (36), and the threaded rod (36) is screwed into the inside of the threaded barrel (33).

2. A hydraulic angular stroke actuator according to claim 1, characterized in that: An oil tank (8) is provided at the upper end of the housing (1), and the hydraulic cylinder (4) is symmetrically mounted on both side outer walls of the housing (1), and the oil tank (8) is connected to the hydraulic cylinder (4) via an oil pipe.

3. The hydraulic rotary actuator according to claim 1, characterized in that: The inner wall of the housing (1) is symmetrically provided with damping shock absorbers (7), and the damping shock absorbers (7) are placed on both sides of the slider (2). The damping shock absorbers (7) are located on the upper side of the guide rod (5), and springs (6) are sleeved on both ends of the guide rod (5).

4. The hydraulic rotary actuator according to claim 1, characterized in that: The guide block (21) is slidably connected to a guide groove provided on the top inner wall of the housing (1), and a linear ball bearing (22) penetrating the slider (2) is embedded in the slider (2), and the guide rod (5) is slidably inserted in the linear ball bearing (22), and connection holes (23) are provided on the inner walls on both sides of the slider (2).

5. The hydraulic rotary actuator according to claim 1, characterized in that: The shift fork rod (24) is hinged to the bottom of the slider (2), and the lower end of the telescopic rod (25) is connected to a shaft sleeve (26), and the interior of the shaft sleeve (26) is connected to a shift fork shaft (27).

6. The hydraulic rotary actuator according to claim 1, characterized in that: The position limiting assembly (3) is symmetrically arranged with respect to the shift fork shaft (27), and the outer wall of the threaded barrel (33) is provided with threads, and the outer wall of the threaded barrel (33) is screwed with a first locking nut (35).

7. The hydraulic rotary actuator according to claim 1, characterized in that: The upper end of the threaded cylinder (33) is provided with a sealing block (32) with a conical structure, and the silicone column (31) is slidably connected to the inside of the sealing block (32), while the upper end of the silicone column (31) protrudes from the sealing block (32).

8. The hydraulic rotary actuator according to claim 1, characterized in that: The threaded cylinder (33) is slidably connected to a piston block (34), and the piston block (34) is connected to the upper end of the threaded rod (36), and the lower end of the threaded rod (36) is located outside the threaded cylinder (33), and a second locking nut (37) is screwed on the outside of the threaded rod (36).

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