Explosion-proof electric actuating mechanism

Abstract

The utility model discloses an explosion-proof electric actuating mechanism, and aims to solve the problem that some actuating mechanisms are lack of detection and protection components for bolt movement in the explosion-proof process, and the bolts are key components for keeping the integrity of the actuating mechanisms, so that improvement space exists. According to the technical scheme, the explosion-proof electric actuating mechanism is characterized by comprising a mechanism body and a protection device arranged on the mechanism body, a detection assembly is arranged in the protection device, a bolt for assembling the mechanism body and the protection device is arranged in the detection assembly, the detection assembly comprises a fixed rod and a sliding rod in sliding connection with the fixed rod, and the sliding rod is connected with the mechanism body. The end, away from the fixed rod, of the sliding rod abuts against the outer wall of the bolt. According to the explosion-proof electric actuating mechanism provided by the utility model, the bolt in the mechanism body can be pre-warned, so that an alarm is quickly given and a worker is informed under the condition that the bolt falls off and moves, and then the worker processes the mechanism body in time to prevent the mechanism body from being damaged.

Description

Technical Field

[0001] The utility model relates to the field of electric actuators, and more specifically, to an explosion-proof electric actuator. Background Art

[0002] An electric actuator is a drive device that can provide linear or rotary motion. It uses a certain driving energy source and works under a certain control signal. The actuator uses liquid, gas, electricity or other energy and converts it into a driving action through a motor, cylinder or other device. Its basic types include partial rotation, multi-turn and linear travel. The basic actuator is used to drive the valve to the fully open or fully closed position. The actuator used to control the valve can accurately move the valve to any position.

[0003] Since the electric actuator is equipped with position sensing devices, torque sensing devices, electrode protection devices, logic control devices, digital communication modules and PID control modules and other devices or modules, and these devices are enclosed in a compact housing. Since the devices or modules connected to the power inside the housing will generate heat during operation, and the non-electrical devices or modules will still generate heat during the transmission process, and the transmission process will also cause the actuator to vibrate, the actuator has high requirements for the quality of the housing. Since the existing actuator lacks detection and protection components for bolt movement during the explosion-proof process, and the bolts are key components to maintain the integrity of the actuator, there is room for improvement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an explosion-proof electric actuator that can give an early warning of the bolts in the mechanism body so that when the bolts fall off or move, an alarm will be quickly sounded and informed to the staff, who can then handle the mechanism body in time to prevent damage to the mechanism body.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: an explosion-proof electric actuator, including a mechanism body and a protective device arranged on the mechanism body, a detection component is arranged in the protective device, and a bolt for assembling the mechanism body and the protective device is arranged in the detection component, the detection component includes a fixed rod and a sliding rod slidably connected to the fixed rod, the end of the sliding rod away from the fixed rod abuts against the outer wall of the bolt, the end of the fixed rod close to the sliding rod is provided with an inner cavity for the sliding rod to slide, a push spring abuts between the sliding rod and the inner wall of the inner cavity, a control switch abutting against the sliding rod is arranged on the inner wall of the inner cavity, and the control switch is electrically connected to a buzzer.

[0006] By adopting the above technical scheme, the protective device protects the mechanism body and the protective device is a shell covering the mechanism body, and the protective device protects the mechanism body inside through bolts, and the sliding rod of the detection component will conflict with the bolt to limit the position of the bolt. If the mechanism body is heated and generates a large amount of vibration, the bolt will gradually detach from the protective device and generate a large outward impact force. At this time, after the bolt is pushed out, it will contact the sliding rod and make the sliding rod move toward the direction close to the fixed rod. The push spring abutting between the sliding rod and the fixed rod will be squeezed by the impact force to move in the inner cavity, and the sliding rod will slide to one end close to the control switch and turn on the control switch to drive the buzzer to sound. Then, the staff will deal with the mechanism body in time by hearing the sound to prevent the mechanism body from being in an unstable state for a long time to work and cause explosion problems, thereby playing a detection and early warning role for the mechanism body, preventing damage to the mechanism body and increasing the service life of the mechanism body.

[0007] The utility model is further configured as follows: a sliding block is fixedly connected to one end of the sliding rod close to the inner wall of the inner cavity, and a sliding groove for the sliding block to slide is opened on the inner wall of the inner cavity.

[0008] By adopting the above technical solution, when the sliding rod moves to one end away from the fixed rod due to a problem with the bolt, the sliding blocks at both ends of the sliding rod can slide in the sliding groove opened on the inner wall of the inner cavity, and when the sliding block slides to the end of the sliding groove and the buzzer is turned on, it can prevent the sliding rod from being completely separated from the fixed rod, thereby ensuring the stability of the sliding rod when it contacts the syringe.

[0009] The utility model is further configured as follows: the outer sleeve of the push spring is provided with a limiting sleeve for limiting the bending of the push spring.

[0010] By adopting the above technical solution, when the push spring is squeezed or stretched, the push spring will undergo elastic deformation to both ends. At this time, the limit sleeve arranged on the outside of the push spring can play a certain protective role on the push spring, preventing the push spring from undergoing large bending, thereby increasing the service life of the push spring and the entire detection assembly.

[0011] The utility model is further configured as follows: the limiting sleeve includes a first limiting sleeve and a second limiting sleeve, one end of the first limiting sleeve is fixedly connected to the sliding rod, and the other end of the first limiting sleeve is inserted into the interior of the second limiting sleeve.

[0012] By adopting the above technical solution, when the bolt becomes loose or displaced, the sliding rod will be squeezed from the original position of the bolt under the pushing action of the pushing spring and press the pushing spring at the same time. When the pushing spring is elastically driven, the first limiting sleeve can slide with the sliding of the sliding rod and slide along the inner wall of the second limiting sleeve, so that the first limiting sleeve and the second limiting sleeve can block the pushing spring when it is stretched and bent, thereby preventing the pushing spring from bending and increasing the service life of the pushing spring.

[0013] The utility model is further configured as follows: a plurality of balls which fit with the inner wall of the second limiting sleeve are arranged on the outer wall of the first limiting sleeve.

[0014] By adopting the above technical solution, when the first limiting sleeve slides in the second limiting sleeve, and the outer wall of the first limiting sleeve is tightly fitted with the inner wall of the second limiting sleeve, the first limiting sleeve and the plurality of balls that are in contact with the inner wall of the second limiting sleeve generate friction when sliding and drive the balls to start rolling, and the rolling of the balls can increase the sliding efficiency of the first limiting sleeve.

[0015] The utility model is further configured as follows: a first limiting block and a second limiting block are respectively provided at the ends of the first limiting sleeve and the second limiting sleeve which are close to each other.

[0016] By adopting the above technical solution, when the first limit sleeve slides in the second limit sleeve, the second limit block on the second limit sleeve can limit the sliding trajectory of the first limit block, preventing the first limit sleeve from sliding out of the second limit sleeve, thereby ensuring the stability of the limit sleeve activity and enabling the limit sleeve to be larger than the push spring for protection.

[0017] The utility model is further configured as follows: a laser radio frequency device for monitoring the activity of the bolt is arranged on one side of the bolt.

[0018] By adopting the above technical solution, the laser radio frequency device can further detect and warn the bolts, so that the loosening or displacement of the bolts can be guaranteed to prevent the explosion of the mechanism body.

[0019] The utility model is further configured as follows: the protection device also includes a pressure relief box controlled by a solenoid valve, and the solenoid valve is electrically connected to the laser radio frequency device.

[0020] By adopting the above technical solution, a pressure relief device is set up, and the laser radio frequency device is electrically connected to the solenoid valve. When the laser radio frequency device detects that the bolts are loose, since the loose bolts are often caused by excessive pressure inside the actuator, the laser radio frequency device drives the solenoid valve to open the connecting pipe connected to the pressure relief box so that the air pressure inside the actuator is guided along the connecting pipe to the pressure relief box, thereby reducing the pressure inside the actuator and avoiding the risk of explosion.

[0021] To sum up, the utility model has the following beneficial effects: it can give an early warning of the bolts in the mechanism body, so that when the bolts fall off or move, an alarm will be quickly sounded and informed to the staff, and then the staff can deal with the mechanism body in time to prevent damage to the mechanism body, realize an explosion-proof effect of the mechanism body, and improve the service life of the mechanism body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the mechanism body of the utility model, which is mainly used to show the structure of the protective device and the detection component;

[0023] Figure 2 for Figure 1 The enlarged schematic diagram of part A is mainly used to show the structure of the fixed rod and the sliding rod.

[0024] In the figure: 1. protective device; 2. pressure relief box; 3. laser radio frequency device; 4. bolt; 5. sliding rod; 6. fixing rod; 7. inner cavity; 8. sliding block; 9. push spring; 10. ball; 11. first limit sleeve; 12. second limit sleeve; 13. first limit block; 14. second limit block; 15. buzzer; 16. control switch. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The utility model is described in detail below in conjunction with the accompanying drawings.

[0029] An explosion-proof electric actuator, refer to Figure 1-Figure 2 , including a mechanism body and a protective device 1 arranged on the mechanism body, a detection component is arranged in the protective device 1, and a bolt 4 for assembling the mechanism body and the protective device 1 is arranged in the detection component. The detection component includes a fixed rod 6 and a sliding rod 5 slidably connected with the fixed rod 6, and the end of the sliding rod 5 away from the fixed rod 6 abuts against the outer wall of the bolt 4, and the end of the fixed rod 6 close to the sliding rod 5 is provided with an inner cavity 7 for the sliding rod 5 to slide, and a push spring 9 abuts between the sliding rod 5 and the inner wall of the inner cavity 7, and a control switch 16 abutting against the sliding rod 5 is arranged on the inner wall of the inner cavity 7, and the control switch 16 is electrically connected to a buzzer 15.

[0030] One end of the sliding rod 5 close to the inner wall of the inner cavity 7 is fixedly connected with a sliding block 8, and a sliding groove for the sliding block 8 to slide is opened on the inner wall of the inner cavity 7. When the sliding rod 5 moves to the end away from the fixed rod 6 due to a problem with the bolt 4, the sliding blocks 8 at both ends of the sliding rod 5 can slide in the sliding groove opened on the inner wall of the inner cavity 7, and when the sliding block 8 slides to the end of the sliding groove and can turn on the buzzer 15, it can prevent the sliding rod 5 from completely separating from the fixed rod 6, thereby ensuring the stability of the sliding rod 5 when it collides with the syringe.

[0031] A laser radio frequency device 3 for monitoring the activity of the bolt 4 is provided on one side of the bolt 4. The laser radio frequency device 3 can further detect and warn the bolt 4, so that the loosening or displacement of the bolt 4 can be guaranteed to prevent the explosion of the mechanism body.

[0032] The protective device 1 also includes a pressure relief box 2 controlled by a solenoid valve, the solenoid valve is electrically connected to the laser radio frequency device 3, and the pressure relief device is set, and the laser radio frequency device 3 is electrically connected to the solenoid valve. When the laser radio frequency device 3 detects that the bolt 4 is loose, since the loosening of the bolt 4 is often caused by excessive pressure inside the actuator, the laser radio frequency device 3 drives the solenoid valve to open the connecting pipe connected to the pressure relief box 2 so that the air pressure inside the actuator is guided along the connecting pipe to the pressure relief box 2, thereby reducing the pressure inside the actuator to avoid the risk of explosion.

[0033] The outer side of the push spring 9 is provided with a limit sleeve for limiting the bending of the push spring 9, and the limit sleeve includes a first limit sleeve 11 and a second limit sleeve 12. One end of the first limit sleeve 11 is fixedly connected to the sliding rod 5, and the other end of the first limit sleeve 11 is inserted into the second limit sleeve 12, and a plurality of balls 10 are provided on the outer wall of the first limit sleeve 11 to fit with the inner wall of the second limit sleeve 12.

[0034] The first limiting sleeve 11 and the second limiting sleeve 12 are respectively provided with a first limiting block 13 and a second limiting block 14 at the ends close to each other. When the first limiting sleeve 11 slides in the second limiting sleeve 12, the second limiting block 14 on the second limiting sleeve 12 can limit the sliding trajectory of the first limiting block 13 to prevent the first limiting sleeve 11 from sliding out of the second limiting sleeve 12, thereby ensuring the stability of the limiting sleeve activity and enabling the limiting sleeve to be well larger than the push spring 9 for protection.

[0035] Working principle: The protective device 1 protects the mechanism body and is a shell that covers the mechanism body. The protective device 1 protects the mechanism body inside through the bolt 4, and the sliding rod 5 of the detection component will conflict with the bolt 4 to limit the position of the bolt 4. If the mechanism body heats up and generates a lot of vibration, the bolt 4 will gradually detach from the protective device 1 and generate a large outward impact force. At this time, the bolt 4 will contact the sliding rod 5 after being pushed out and make the sliding rod 5 move toward the direction close to the fixed rod 6. The push spring 9 abutting between the sliding rod 5 and the fixed rod 6 will be squeezed by the impact force and move in the inner cavity 7. The sliding rod 5 will slide to one end close to the control switch 16 and turn on the control switch 16 to drive the buzzer 15 to sound. Then the staff will deal with the mechanism body in time by hearing the sound to prevent the mechanism body from being in an unstable state for a long time to work and cause explosion problems. Then it plays a role of detection and early warning for the mechanism body, prevents damage to the mechanism body, and increases the service life of the mechanism body.

[0036] When the push spring 9 is squeezed or stretched, the push spring 9 will undergo elastic deformation towards both ends. At this time, the limit sleeve arranged on the outside of the push spring 9 can play a certain protective role on the push spring 9 and prevent the push spring 9 from undergoing large bending, thereby increasing the service life of the push spring 9 and the entire detection assembly.

[0037] When the bolt 4 becomes loose or displaced, the sliding rod 5 will be squeezed from the original position of the bolt 4 under the pushing action of the pushing spring 9 and press the pushing spring 9 at the same time. When the pushing spring 9 is elastically driven, the first limiting sleeve 11 can slide with the sliding of the sliding rod 5 and slide along the inner wall of the second limiting sleeve 12, so that the first limiting sleeve 11 and the second limiting sleeve 12 can block the pushing spring 9 when it is stretched and bent, thereby preventing the pushing spring 9 from bending and increasing the service life of the pushing spring 9.

[0038] When the first limiting sleeve 11 slides in the second limiting sleeve 12, and the outer wall of the first limiting sleeve 11 is tightly fitted with the inner wall of the second limiting sleeve 12, the first limiting sleeve 11 and the plurality of balls 10 that are in contact with the inner wall of the second limiting sleeve 12 generate friction when sliding and drive the balls 10 to start rolling, and the rolling of the balls 10 can increase the sliding efficiency of the first limiting sleeve 11.

[0039] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An explosion-proof electric actuator, comprising a mechanism body and a protective device (1) arranged on the mechanism body, characterized in that: The protective device (1) is provided with a detection component, and the detection component is provided with a bolt (4) for assembling a mechanism body and the protective device (1). The detection component includes a fixed rod (6) and a sliding rod (5) slidably connected to the fixed rod (6). The end of the sliding rod (5) away from the fixed rod (6) abuts against the outer wall of the bolt (4). The end of the fixed rod (6) close to the sliding rod (5) is provided with an inner cavity (7) for the sliding rod (5) to slide. A push spring (9) abuts between the sliding rod (5) and the inner wall of the inner cavity (7). A control switch (16) abutting against the sliding rod (5) is provided on the inner wall of the inner cavity (7). The control switch (16) is electrically connected to a buzzer (15).

2. The explosion-proof electric actuator according to claim 1, characterized in that: One end of the sliding rod (5) close to the inner wall of the inner cavity (7) is fixedly connected to a sliding block (8), and a sliding groove for the sliding block (8) to slide is provided on the inner wall of the inner cavity (7).

3. The explosion-proof electric actuator according to claim 1, characterized in that: The outer side of the push spring (9) is provided with a limiting sleeve for limiting the bending of the push spring (9).

4. The explosion-proof electric actuator according to claim 3, characterized in that: The limiting sleeve comprises a first limiting sleeve (11) and a second limiting sleeve (12); one end of the first limiting sleeve (11) is fixedly connected to the sliding rod (5), and the other end of the first limiting sleeve (11) is inserted into the interior of the second limiting sleeve (12).

5. The explosion-proof electric actuator according to claim 4, characterized in that: A plurality of balls (10) are arranged on the outer wall of the first limiting sleeve (11) and are fitted with the inner wall of the second limiting sleeve (12).

6. The explosion-proof electric actuator according to claim 5, characterized in that: A first limiting block (13) and a second limiting block (14) are respectively provided at the ends of the first limiting sleeve (11) and the second limiting sleeve (12) that are close to each other.

7. The explosion-proof electric actuator according to claim 1, characterized in that: A laser radio frequency device (3) for monitoring the activity of the bolt (4) is arranged on one side of the bolt (4).

8. The explosion-proof electric actuator according to claim 7, characterized in that: The protective device (1) also includes a pressure relief box (2) controlled by a solenoid valve, and the solenoid valve is electrically connected to the laser radio frequency device (3).

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