CN216078545U - Valve position detection device of electro-hydraulic actuator - Google Patents
Valve position detection device of electro-hydraulic actuator Download PDFInfo
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- CN216078545U CN216078545U CN202122433594.3U CN202122433594U CN216078545U CN 216078545 U CN216078545 U CN 216078545U CN 202122433594 U CN202122433594 U CN 202122433594U CN 216078545 U CN216078545 U CN 216078545U
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Abstract
The utility model provides a valve position detection device of an electro-hydraulic actuator, which comprises a shell, wherein a valve main shaft is arranged in the shell, a plurality of feedback shafts are arranged around the valve main shaft, a large gear is arranged at one end of the valve main shaft, a small gear is arranged on each feedback shaft, each small gear is meshed with the large gear, and an angular displacement sensor is arranged on each small gear; casing one side is equipped with the installation base, and four sides of installation base lower extreme respectively with be connected with damper between the casing lateral wall, damper include the first box body of being connected with the installation base, the second box body of being connected with the casing lateral wall, the inside slide that all slides of first box body and second box body has been connected with the transfer line between two slides, every slide opposite side all is connected with damping spring. The utility model greatly improves the control safety, reliability and system intellectualization through three sensors, solves the defects of one or two sensors in the prior art, and can avoid CPU damage caused by vibration through the damping mechanism.
Description
Technical Field
The utility model mainly relates to the technical field of valve control electro-hydraulic control, in particular to a valve position detection device of an electro-hydraulic actuating mechanism.
Background
The electro-hydraulic actuator is a device which moves according to a received electrical signal to convert the received electrical signal into displacement of the electro-hydraulic actuator, so that the electro-hydraulic actuator is generally used for adjusting the opening degree of a valve, namely, adjusting the opening percentage of the valve, and when the electro-hydraulic actuator is actually applied to the valve, the valve position is generally required to be detected.
The angle displacement sensing module that the electro-hydraulic actuator used on valve position detection, there are 1 or two angle displacement sensors in general before, when only a sensor, when the sensor goes wrong, because a sensor, the system can't judge the quality of sensor, control system receives wrong valve position feedback signal, after CPU handles, control system output error instruction, the valve position can't reach the required position of control all the time, control is inefficacy, the valve can the false switch or the false switch in serious time, lead to whole chemical plant to shut down. On the basis, a sensor is generally added behind the system, the system compares the deviation of the two sensors, the system judges according to the parameter, when the deviation of the two sensors is large, the system can automatically judge that one sensor is damaged, the system stops the control function of the system, keeps the valve position and gives an alarm. After a sensor is added, the system can not send wrong instructions due to wrong feedback, great progress is made in safety, after problems occur, the system can not judge which sensor is in the problems, manual timely judgment is needed, the probability of stopping control of the system is increased, hidden dangers are left for normal production of the device, the valve can generate great vibration when in work, great influence can be generated on a CPU, and the CPU is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model mainly provides a valve position detection device of an electro-hydraulic actuator, which is used for solving the technical problems in the background technology.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a valve position detection device of an electro-hydraulic actuator comprises a shell, wherein a valve main shaft is arranged in the shell, a plurality of feedback shafts are arranged around the valve main shaft and are distributed circumferentially around the axis of the valve main shaft, a large gear is arranged at one end of the valve main shaft, a small gear is arranged on each feedback shaft and is meshed with the large gear, and an angular displacement sensor is arranged on each small gear; the damping device is characterized in that a mounting base is arranged on one side of the shell, four sides of the lower end of the mounting base are connected with damping mechanisms between the side walls of the shell respectively, each damping mechanism comprises a first box body connected with the mounting base and a second box body connected with the side wall of the shell, sliding plates are arranged in the first box body and the second box body in a sliding mode, a transmission rod is connected between the two sliding plates, and the other side of each sliding plate is connected with a damping spring.
Preferably, the angular displacement sensors are provided in three.
Preferably, a plurality of first fixing bolts are connected between the valve main shaft and the large gear, and a plurality of second fixing bolts are connected between the small gear and the feedback shaft.
Preferably, the control box is installed to installation base upper end, the inside CPU that is equipped with of control box, the control box upper end is equipped with and CPU electric connection's display screen.
Preferably, one side, far away from the damping spring, of the sliding plate in the first box body and the second box body is connected with a rubber ring pad.
Preferably, when both of the two damping springs are in a maximum shortened state, the first case and the second case are not in contact with each other.
Preferably, a locking bolt is connected between the second box body and the shell.
Compared with the prior art, the utility model has the beneficial effects that:
the angular displacement of the pinion is detected by the angular displacement sensors, the angular displacement of the gearwheel is calculated according to the reduction ratio, the deviation values among the three sensors are compared, when one of the three sensors fails, manual judgment is not needed, the system can calculate out which angular displacement sensor fails, the system can automatically shield the feedback value of the sensor, the sensor continues to work through the other two sensors, the device can normally operate, the sensor with the problem is replaced at a proper time, and through the three sensors, the control safety, the reliability and the system intelligence are greatly improved, and the defects of one or two sensors in the past are overcome; the shock absorption can be realized through the shock absorption mechanism, and the damage of the CPU caused by the shock is avoided.
The present invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is a schematic view of the interior of the housing of the present invention;
FIG. 2 is an enlarged view of the present invention at A;
FIG. 3 is a perspective view of the mounting base of the present invention;
fig. 4 is a schematic structural view of the shock absorbing mechanism of the present invention.
In the figure: 1. a housing; 11. a valve spindle; 12. a feedback axis; 13. a bull gear; 14. a pinion gear; 15. an angular displacement sensor; 16. a first fixing bolt; 17. a second fixing bolt; 2. installing a base; 21. a control box; 22. a display screen; 3. a damping mechanism; 31. a first case; 32. a second box body; 33. a slide plate; 34. a transmission rod; 35. a damping spring; 36. a rubber ring pad; 37. and locking the bolt.
Detailed Description
In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, the present invention provides a technical solution: the utility model provides an electricity liquid actuating mechanism's valve position detection device, includes casing 1, 1 inside valve main shaft 11 that is equipped with of casing, be equipped with a plurality of feedback axles 12 around valve main shaft 11, and a plurality of feedback axle 12 is the circumference around 11 axle centers on the valve main shaft and distributes, gear wheel 13, every are installed to 11 last one ends of valve main shaft the last pinion 14 of all installing of feedback axle 12, and every pinion 14 all meshes with gear wheel 13, every all install angle displacement sensor 15 on the pinion 14, angle displacement sensor 15 establishes to three. Detect pinion 14 angle displacement through angle displacement sensor 15, calculate big gear 13 angle displacement according to the reduction ratio, through the deviation value between three sensor of comparison, when one of them displacement sensing goes wrong, need not artifical judgement, the system can deduce specific angle displacement sensor 15 in three and go wrong, the system can shield this sensor feedback numerical value automatically, continue to carry out work through two other sensors, the device can normal operating, treat suitable opportunity change the sensor that has the problem can, through three sensor, the control security is greatly improved, the intellectuality of reliability and system, solve in the past one or two sensor not enough.
Please refer to fig. 1 and 2 again, a plurality of first fixing bolts 16 are connected between the valve main shaft 11 and the large gear 13, and fixed by the first fixing bolts 16, so as to prevent the valve main shaft 11 and the large gear 13 from sliding relatively, a plurality of second fixing bolts 17 are connected between the small gear 14 and the feedback shaft 12, and fixed by the second fixing bolts 17, so as to prevent the small gear 14 and the feedback shaft 12 from sliding relatively, thereby ensuring the effective use of the device.
Please refer to fig. 1, 3 and 4 again, a mounting base 2 is arranged on one side of the housing 1, a control box 21 is mounted at the upper end of the mounting base 2, a CPU is arranged in the control box 21, and a display screen 22 electrically connected with the CPU is arranged at the upper end of the control box 21 for facilitating observation through the display screen 22. Four sides of the lower end of the installation base 2 are respectively connected with the damping mechanisms 3 between the side walls of the shell 1, each damping mechanism 3 comprises a first box body 31 connected with the installation base 2 and a second box body 32 connected with the side walls of the shell 1, sliding plates 33 are arranged inside the first box body 31 and the second box body 32 in a sliding mode, a transmission rod 34 is connected between the sliding plates 33, each sliding plate 33 is connected with a damping spring 35 on the other side, and the force and the vibration force generated by the deformation of the two damping springs 35 are offset, so that the damping is realized.
Please refer to fig. 3 and 4 again, a rubber ring pad 36 is connected to one side of the sliding plate 33 inside the first box 31 and the second box 32, which is far away from the damping spring 35, and the rubber ring pad 36 can prevent the damping spring 35 from colliding with the box to generate vibration when the damping spring 35 contracts and rebounds, so as to further improve the damping effect. Two damping spring 35 is when all shortening the state for the biggest, and first box body 31 and second box body 32 do not contact, avoid two box body collisions vibrations, further improve the shock attenuation effect. And a locking bolt 37 is connected between the second box body 32 and the shell 1, and the second box body is convenient to disassemble and assemble through the locking bolt 37.
The specific operation mode of the utility model is as follows:
the angular displacement of the pinion 14 is detected by the angular displacement sensors 15, the angular displacement of the gearwheel 13 is calculated according to the reduction ratio, the deviation values among the three sensors are compared, when one of the three sensors fails, manual judgment is not needed, the system can calculate out which angular displacement sensor 15 fails, the system can automatically shield the feedback value of the sensor, the other two sensors continue to work, the device can normally operate, the sensor with the failure is replaced at a proper time, the control safety, reliability and system intellectualization are greatly improved by the three sensors, the defects of one or two sensors in the prior art are overcome, the force and the vibration force generated by the deformation of the two damping springs 35 are offset, so that the damping is realized, the rubber ring pad 36 can avoid the vibration caused by the collision with the box body when the damping springs 35 contract and rebound, further improving the damping effect.
The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (7)
1. The utility model provides an electro-hydraulic actuator's valve position detection device, includes casing (1), its characterized in that: a valve main shaft (11) is arranged in the shell (1), a plurality of feedback shafts (12) are arranged around the valve main shaft (11), the feedback shafts (12) are distributed circumferentially around the axis of the valve main shaft (11), a large gear (13) is installed at one end of the valve main shaft (11), a small gear (14) is installed on each feedback shaft (12), each small gear (14) is meshed with the large gear (13), and an angular displacement sensor (15) is installed on each small gear (14);
casing (1) one side is equipped with installation base (2), four sides of installation base (2) lower extreme respectively with be connected with damper (3) between casing (1) lateral wall, damper (3) include first box body (31) of being connected with installation base (2) and second box body (32) of being connected with casing (1) lateral wall, first box body (31) and second box body (32) inside all slides has slide (33), two be connected with transfer line (34) between slide (33), every slide (33) opposite side all is connected with damping spring (35).
2. The valve position detection device of the electro-hydraulic actuator according to claim 1, wherein: the angular displacement sensors (15) are three.
3. The valve position detection device of the electro-hydraulic actuator according to claim 1, wherein: a plurality of first fixing bolts (16) are connected between the valve main shaft (11) and the large gear (13), and a plurality of second fixing bolts (17) are connected between the small gear (14) and the feedback shaft (12).
4. The valve position detection device of the electro-hydraulic actuator according to claim 1, wherein: control box (21) are installed to installation base (2) upper end, control box (21) inside is equipped with CPU, control box (21) upper end be equipped with CPU electric connection's display screen (22).
5. The valve position detection device of the electro-hydraulic actuator according to claim 1, wherein: and one sides of the sliding plates (33) in the first box body (31) and the second box body (32) far away from the damping spring (35) are connected with rubber ring pads (36).
6. The valve position detection device of the electro-hydraulic actuator according to claim 1, wherein: when the two damping springs (35) are in the maximum shortening state, the first box body (31) and the second box body (32) are not contacted.
7. The valve position detection device of the electro-hydraulic actuator according to claim 1, wherein: and a locking bolt (37) is connected between the second box body (32) and the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122433594.3U CN216078545U (en) | 2021-10-09 | 2021-10-09 | Valve position detection device of electro-hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122433594.3U CN216078545U (en) | 2021-10-09 | 2021-10-09 | Valve position detection device of electro-hydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216078545U true CN216078545U (en) | 2022-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122433594.3U Active CN216078545U (en) | 2021-10-09 | 2021-10-09 | Valve position detection device of electro-hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216078545U (en) |
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2021
- 2021-10-09 CN CN202122433594.3U patent/CN216078545U/en active Active
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