Pneumatic actuating mechanism of spring anti-falling device
By using buffer actuators and erecting processing technology in pneumatic film actuators, the problem of easy tilt and bending of traditional actuators is solved, and the stability of the actuators and long-term normal operation are achieved.
Patent Information
- Application Number
- CN202422358473.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The springs of traditional pneumatic film actuators are prone to inclination, bending, deforming, or even collapse due to machining errors, causing the actuator to lose its control function.
A pneumatic actuator for spring anti-reversal device is designed, using buffer actuator and static treatment technology to achieve buffering effect through compression and discharge of air in the air cavity, and the outer diameter of the spring is limited by the positioning sleeve to control its straightness and verticality errors.
It effectively avoids the inclination and bending of the spring during compression, ensures the stability and control function of the actuator, meets the requirements of 100,000 reuses of the K3 nuclear power auxiliary system, and maintains a normal working state after a long period of time.
Smart Images
Figure CN222992008U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial automation, and particularly relates to a pneumatic actuator for a spring anti - falling device. Background Art
[0002] A pneumatic actuator for a spring anti - falling device refers to a pneumatic control device used to prevent equipment or structures from tipping over when subjected to external forces in a mechanical or automated system. It uses compressed air or other gases as the power source to drive mechanical actions. There is extremely high radiation inside a nuclear power plant, and no external leakage is allowed. Whether it is the working equipment inside or outside the nuclear island, especially valves, must have extremely high safety, reliability, and stability. Therefore, the safety and stability of the actuator used in nuclear power are extremely important. In a traditional pneumatic diaphragm actuator, the spring undergoes frequent reciprocating telescopic movements. Due to the machining error of the spring itself, it is prone to tilting, bending deformation, or even collapsing, resulting in the loss of control function of the pneumatic diaphragm actuator. Summary of the Utility Model
[0003] (1) Technical Problems to be Solved
[0004] In view of the deficiencies of the prior art, the utility model provides a pneumatic actuator for a spring anti - falling device, which solves the problem that in a traditional pneumatic diaphragm actuator, due to the frequent reciprocating telescopic movement of the spring and the machining error of the spring itself, the spring is prone to tilting, bending deformation, or even collapsing, resulting in the loss of control function of the pneumatic diaphragm actuator.
[0005] (2) Technical Solutions
[0006] To achieve the above objectives, the utility model is realized through the following technical solutions: A pneumatic actuator for a spring anti - falling device includes an upper membrane cover, a lower membrane cover, and a membrane. A set of fixed seats is arranged inside the lower membrane cover. A spring is fixedly connected to the upper surface of each fixed seat. A fixed ring is fixedly connected to the lower surface of the lower membrane cover. A set of fixed brackets is arranged on the circumferential side of the fixed ring. A set of connecting columns is fixedly connected to the lower surface of the membrane. A set of bolts is arranged at the opposite ends of the upper membrane cover and the lower membrane cover. A buffer actuator is fixedly installed on the upper surface of each fixed seat, and a set of buffer actuators is respectively movably sleeved on a set of springs.
[0007] As a preferred technical solution of the utility model, a connecting ring is fixedly connected to the opposite surfaces of a set of fixed brackets, and a set of connecting columns is respectively fixedly connected to a set of springs.
[0008] As a preferred technical solution of the utility model, a set of brackets is arranged on the circumferential side of the lower membrane cover, and two fixed covers are fixedly connected to the opposite surfaces of a set of brackets.
[0009] As a preferred technical solution of the present utility model, one of the two groups of the fixed covers located below is fixedly connected to a group of fixed brackets by screws, and one of the two groups of the fixed covers located above is fixedly connected to the lower film cover by screws.
[0010] As a preferred technical solution of the present utility model, a group of connecting rods I are fixedly connected to the circumferential side surfaces of each of the connecting columns, and a group of connecting rods II are fixedly connected to the upper surfaces of each of the fixed seats. Each group of the connecting rods II is movably connected to each group of the connecting rods I respectively.
[0011] (III) Beneficial effects
[0012] 1. The buffer actuator achieves the purpose of buffering through the compression and discharge of air in the air chamber, ensuring that when the actuator responds in a short time, the displacement component is buffered to avoid collisions, so as to ensure the normal operation of the nuclear power valve after a large number of repeated and rapid operations. When a signal pressure within a certain range is input into the thin film air chamber, a thrust is generated to move the push rod of the pneumatic actuator, and a group of springs are compressed when the diaphragm moves. A group of connecting rods I and a group of connecting rods II are respectively arranged on the circumferential side surfaces of the connecting column and the fixed seat, and the two are movably connected. Cooperating with the buffer actuator can ensure the stability during the spring compression process, prevent it from tilting, and thus avoid major problems.
[0013] 2. The spring adopts a presetting treatment technology, which is compressed and stretched. The outer diameter of the spring is always restricted by the positioning sleeve during the compression or stretching process, controlling the straightness and perpendicularity errors that may be formed during the spring presetting process. The spring after the presetting treatment has parameter performance meeting the requirements of the actuator for the nuclear power auxiliary system of class K3 for 100,000 repeated uses, and can still ensure its normal operation without any deviation after long-term work. Description of the drawings
[0014] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and implement it according to the content of the description, the following takes the preferred embodiment of the present utility model and combines with the drawings to describe in detail as follows.
[0015] Figure 1 It is the overall structure diagram of the present utility model;
[0016] Figure 2 It is the structure diagram of the lower film cover of the present utility model;
[0017] Figure 3 It is the structure diagram of the bracket of the present utility model;
[0018] Figure 4 It is the structure diagram of the fixed seat of the present utility model.
[0019] Legend: 1. Upper film cover; 2. Lower film cover; 3. Diaphragm; 4. Bolt; 5. Bracket; 6. Fixed frame; 7. Connecting ring; 8. Connecting column; 9. Spring; 10. Fixed ring; 11. Fixed cover; 12. First connecting rod; 14. Buffer actuator; 15. Fixed seat; 16. Second connecting rod. Detailed implementation
[0020] In the embodiment of the present application, by providing a pneumatic actuator with a spring anti - fall device, the problem that the spring of the traditional pneumatic diaphragm actuator has frequent telescopic reciprocating motion, and due to the processing error of the spring itself, it is easy to tilt, bend and deform, or even collapse, resulting in the loss of control function of the pneumatic diaphragm actuator is effectively solved.
[0021] Embodiment
[0022] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, the general idea of the embodiment of the present application is as follows:
[0023] Aiming at the problems existing in the prior art, the utility model provides a pneumatic actuator with a spring anti - fall device, which includes an upper film cover 1, a lower film cover 2 and a diaphragm 3. A set of fixed seats 15 are arranged in the lower film cover 2. The upper surface of each fixed seat 15 is fixedly connected with a spring 9. The lower surface of the lower film cover 2 is fixedly connected with a fixed ring 10. A set of fixed frames 6 are arranged on the circumferential side of the fixed ring 10. The lower surface of the diaphragm 3 is fixedly connected with a set of connecting columns 8. A set of bolts 4 are arranged at the opposite ends of the upper film cover 1 and the lower film cover 2. The upper surface of each fixed seat 15 is fixedly installed with a buffer actuator 14. A set of buffer actuators 14 are respectively movably sleeved with a set of springs 9. The upper film cover 1 and the lower film cover 2 are made of high - strength ductile iron. A set of brackets 5 are arranged on the circumferential side of the lower film cover 2, making the overall structure more rigid and reliable, ensuring the overall seismic performance. The set of brackets 5 can be disassembled, with a simple structure and convenient for disassembly, installation and maintenance. A set of buffer actuators 14 are arranged in the lower film cover 2. The buffer actuator 14 achieves buffering by compressing and discharging the air in the air chamber, ensuring that the displacement component is buffered when the actuator reacts in a short time and avoiding collision.
[0024] A set of fixing brackets 6 are fixedly connected to each other on the opposite surfaces with connecting rings 7. A set of connecting columns 8 are respectively fixedly connected to a set of springs 9. A set of brackets 5 are arranged on the circumferential side surface of the lower membrane cover 2. Two fixing covers 11 are fixedly connected to each other on the opposite surfaces of a set of brackets 5. When a signal pressure within a certain range is input into the thin-film air chamber, a thrust is generated to move the push rod of the pneumatic actuator. During the movement of the diaphragm 3, a set of springs 9 are driven to be compressed. A set of connecting rods one 12 and a set of connecting rods two 16 are respectively arranged on the circumferential side surfaces of the connecting column 8 and the fixed seat 15, and the two are movably connected. Cooperating with the buffer actuator 14 can ensure the stability during the compression of the spring 9 and prevent it from tilting, thereby avoiding the occurrence of major problems.
[0025] One set of the two sets of fixing covers 11 located below is fixedly connected to a set of fixing brackets 6 by screws. One set of the two sets of fixing covers 11 located above is fixedly connected to the lower membrane cover 2 by screws. A set of connecting rods one 12 are fixedly connected to the circumferential side surface of each connecting column 8. A set of connecting rods two 16 are fixedly connected to the upper surface of each fixed seat 15. Each set of connecting rods two 16 are respectively movably connected to each set of connecting rods one 12. The spring 9 adopts a presetting treatment technology, and it is compressed and stretched. During the compression or stretching process of the spring 9, its outer diameter is always restricted by the positioning sleeve, controlling the straightness and perpendicularity errors that may be formed during the presetting treatment of the spring 9. After the presetting treatment, the spring 9 has parameter performance meeting the requirements of the actuator for the K3-class nuclear power auxiliary system for 100,000 repeated uses and can still ensure its normal operation without any deviation after long-term work.
[0026] Working principle:
[0027] The upper diaphragm cover 1 and the lower diaphragm cover 2 are made of high-strength ductile iron. A set of brackets 5 are arranged on the annular side of the lower diaphragm cover 2, making the overall structure more rigid and reliable, ensuring the overall seismic performance. The set of brackets 5 can be disassembled, with a simple structure and convenient for disassembly, installation and maintenance. A set of buffer actuators 14 are arranged inside the lower diaphragm cover 2. The buffer actuators 14 achieve buffering by compressing and discharging the air in the air chamber, ensuring that when the actuator reacts in a short time, the displacement component is buffered to avoid collision, so as to ensure the normal operation state of the nuclear power valve after a large number of repeated and rapid operations. When a signal pressure within a certain range is input into the thin film air chamber, a thrust is generated to move the push rod of the pneumatic actuator. During the movement of the diaphragm 3, a set of springs 9 are driven to compress. A set of connecting rods one 12 and a set of connecting rods two 16 are respectively arranged on the annular sides of the connecting column 8 and the fixed seat 15, and the two are movably connected. Cooperating with the buffer actuator 14 can ensure the stability during the compression of the spring 9 and prevent it from tilting, thus avoiding the occurrence of major problems. The diaphragm 3 is composed of a composite of rubber and fabric curtain. The function of the rubber is to make the diaphragm 3 have sealing performance, while the main function of the fabric curtain is to make the diaphragm 3 have a certain mechanical strength and limit its deformation. The diaphragm 3 can achieve functions of pneumatic pushing, spring 9 resetting, and passive safety position resetting. That is, when the system fails, loses power or air source, the pneumatic actuator can automatically return to the safe open or closed position without manual intervention, with characteristics such as smooth movement, high speed, and low noise. The pneumatic actuator adds shielding protection to the solenoid valve to prevent the leakage of electromagnetic energy, and at the same time increases the anti-interference ability to the environment, and adds surge suppression measures to the solenoid valve to improve the tolerance to surge transients. At the same time, the whole machine is grounded to increase the bypass of electromagnetic interference signals, so that the solenoid valve is not affected by the electromagnetic interference in the nuclear power plant during the whole action process. The spring 9 adopts a setting treatment technology, compressing and stretching it. The outer diameter of the spring 9 is always restricted by the positioning sleeve during the compression or stretching process, controlling the straightness and perpendicularity errors that may be formed during the setting treatment process of the spring 9. After the setting treatment, the spring 9 has parameter performance meeting the requirements of the actuator for the nuclear power auxiliary system of class K3 for 100,000 repeated uses, and can still ensure its normal operation without any deviation after long-term work.
[0028] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.
Claims
1. A pneumatic actuator for a spring anti-reversal device, comprising an upper diaphragm cover (1), a lower diaphragm cover (2) and a diaphragm (3), characterized in that: A group of fixing seats (15) are arranged inside the lower membrane cover (2), and a spring (9) is fixedly connected to the upper surface of each fixing seat (15); The lower surface of the lower membrane cover (2) is fixedly connected to a fixing ring (10), the annular side surface of the fixing ring (10) is provided with a group of fixing frames (6), the lower surface of the membrane (3) is fixedly connected to a group of connecting columns (8), and the opposite ends of the upper membrane cover (1) and the lower membrane cover (2) are provided with a group of bolts (4).
2. A pneumatic actuator for a spring anti-fall device as claimed in claim 1, characterized in that: A buffer actuator (14) is fixedly mounted on the upper surface of each of the fixing seats (15); Wherein, a group of the buffer actuators (14) are respectively movably sleeved with a group of springs (9).
3. A pneumatic actuator for a spring anti-fall device as claimed in claim 1, characterized in that: A set of opposite surfaces of the fixing frames (6) are fixedly connected with connecting rings (7); Wherein, a group of connecting columns (8) are respectively fixedly connected to a group of springs (9).
4. A pneumatic actuator for a spring anti-fall device as claimed in claim 1, characterized in that: A group of brackets (5) are provided on the annular side surface of the lower membrane cover (2); Wherein, two fixed covers (11) are fixedly connected to opposite surfaces of a group of brackets (5).
5. A pneumatic actuator for a spring anti-fall device as claimed in claim 4, characterized in that: Of the two groups of fixed covers (11), the group of fixed covers (11) located at the bottom is fixedly connected to a group of fixed frames (6) by means of screws.
6. A pneumatic actuator for a spring anti-fall device as claimed in claim 5, characterized in that: Of the two groups of fixed covers (11), the upper group of fixed covers (11) is fixedly connected to the lower membrane cover (2) via screws.
7. A pneumatic actuator for a spring anti-fall device as claimed in claim 1, characterized in that: Each of the connecting columns (8) has an annular side surface fixedly connected to a set of connecting rods (12); Wherein, a set of connecting rods 2 (16) is fixedly connected to the upper surface of each fixing seat (15).
8. A pneumatic actuator for a spring anti-fall device as claimed in claim 7, characterized in that: Each group of connecting rods 2 (16) is movably connected to each group of connecting rods 1 (12).