Modularized electromagnetic isolation cavity of explosion-proof intelligent electric actuator

Abstract

The invention relates to the technical field of electromagnetic isolation cavities, and particularly discloses an explosion-proof intelligent electric actuator modularized electromagnetic isolation cavity which comprises an actuator shell, an intelligent electric actuator module is borne in the actuator shell, a ventilation opening is formed in one side of the actuator shell, a sealing mechanism is arranged on the inner wall of the ventilation opening, and an isolation mechanism is arranged on the inner wall of the ventilation opening. According to the invention, impact force generated by explosion in the actuator shell can be used for sealing the ventilation opening of the actuator shell through the sealing mechanism, so that combustion-supporting gas is isolated, electrical components in the actuator shell are prevented from burning, and fire spreading is avoided; meanwhile, the sealing mechanism drives the isolation mechanism to isolate the electric actuator module, electromagnetic interference can be restrained, electromagnetic leakage can be reduced, secondary damage can be reduced, explosion energy is limited to be released in the cavity, damage to peripheral equipment and personnel is reduced, and economic losses and safety risks caused by accidents are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic isolation cavities, and in particular to a modular electromagnetic isolation cavity for an explosion-proof intelligent electric actuator. Background Art

[0002] The intelligent electric actuator module is a highly integrated and intelligent control unit that integrates functions such as position feedback, servo amplification, self-diagnosis, and PI adjustment. It supports multiple control modes and signal types, has high precision, high reliability, and a user-friendly operation interface, and can achieve precise control and automated management of valves.

[0003] If the intelligent electric actuator module is close to flammable and explosive items such as flames, firecrackers, gasoline, or when it is overheated, short-circuited, or overloaded, it may heat up, spontaneously combust, or even explode. When the intelligent electric actuator module explodes, it will damage the actuator itself and other related equipment, and may also cause a fire, further expanding the scope of the accident, and even cause injury or death to personnel on site, posing a major safety hazard. To this end, we propose an explosion-proof intelligent electric actuator modular electromagnetic isolation cavity. Summary of the Invention

[0004] The purpose of the present invention is to provide an explosion-proof modular electromagnetic isolation cavity for an intelligent electric actuator to solve the problem proposed in the above-mentioned background technology that when the intelligent electric actuator module explodes, it will damage the actuator itself and other related equipment, cause a fire, further expand the scope of the accident, and even cause injury or death to on-site personnel, posing a major safety hazard.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an explosion-proof intelligent electric actuator modular electromagnetic isolation chamber, comprising an actuator housing, wherein the intelligent electric actuator module is carried inside the actuator housing, and a ventilation opening is provided on one side of the actuator housing;

[0006] A sealing mechanism, the sealing mechanism being located on the inner wall of the vent, the sealing mechanism comprising a sealing rod fixedly connected to the inner wall of the actuator housing, a sealing plate being slidably connected to the periphery of the sealing rod, and the sealing plate being located inside the vent;

[0007] The isolation mechanism is located inside the actuator housing. The isolation mechanism includes a conductive frame arranged inside the actuator housing. The outer periphery of the conductive frame is fixedly connected to a guide rail. A conductive rod is slidably connected above the conductive frame. The conductive rod is located inside the guide rail and is slidably connected to the guide rail.

[0008] Wherein, the sealing mechanism includes a spring 1 fixedly connected to the inner wall of the actuator housing, the spring 1 is fixedly connected to the sealing plate at one end away from the actuator housing, and the spring 1 is located on the periphery of the sealing rod.

[0009] The outer wall of the sealing plate is fixedly connected to the limiting plate, the inner wall of the actuator housing is provided with a limiting groove, the limiting plate is located inside the limiting groove and is slidably connected to the limiting groove, a clamping groove is provided at the bottom of the limiting groove, a spring 2 is fixedly connected to the inner wall of the clamping groove, and a clamping block is fixedly connected to one end of the spring 2 away from the bottom of the clamping groove, the clamping block is located inside the clamping groove and is slidably connected to the clamping groove, and the end of the clamping block away from the spring 2 abuts against the limiting plate.

[0010] The isolation mechanism includes a connecting rod fixedly connected to one end of the sealing plate close to the conductive frame, and an end of the connecting rod away from the sealing plate is fixedly connected to the conductive frame.

[0011] Among them, the upper end of the conductive frame is fixedly connected to an execution motor, one end of the execution motor is fixedly connected to a trigger box, a trigger rod is slidably connected inside the trigger box, and the trigger rod is fixedly connected to a baffle at one end away from the trigger box, and the baffle is close to the inner wall of the actuator housing.

[0012] Among them, the trigger rod is fixedly connected to the end away from the baffle with an electromagnet 1, and the inner wall of the trigger box is fixedly connected to an electromagnet 2. The electromagnet 1 and the electromagnet 2 are respectively connected to the execution motor circuit.

[0013] Among them, a screw is provided at one end of the execution motor away from the trigger box, the screw is rotatably connected to the conductive frame, the screw is located inside the guide rail, a push plate is provided on the periphery of the screw, the push plate is threadedly connected to the screw, the push plate is located above the conductive frame and is slidably connected to the conductive frame.

[0014] Among them, one end of the push plate is fixedly connected to a lock buckle, and the lock buckle is provided with multiple connecting buckles at one end away from the push plate. Each of the connecting buckles is movably connected to each other, the connecting buckle is rotatably connected to the lock buckle, and the conductive rod is fixedly connected to the connecting buckle.

[0015] Among them, the end of the screw rod away from the execution motor is fixedly connected to a retaining ring, and the end of the retaining ring close to the screw rod is fixedly connected to an electromagnet three, and the electromagnet three is connected to the execution motor circuit.

[0016] The present invention has at least the following beneficial effects:

[0017] The present invention can, when the actuator housing explodes due to motor overload or short circuit, use the impact force generated by the explosion inside the actuator housing to seal the vents of the actuator housing through a sealing mechanism, isolate the combustion-supporting gas, prevent the electrical components inside the actuator housing from burning, and avoid the spread of fire. At the same time, the sealing mechanism drives the isolation mechanism to isolate the electric actuator module, which can suppress electromagnetic interference, reduce electromagnetic leakage, and reduce secondary damage, limit the release of explosion energy inside the cavity, reduce damage to surrounding equipment and personnel, and reduce the economic losses and safety risks caused by accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the actuator housing of the present invention;

[0019] Figure 2 Schematic diagram of the conductive rod structure of the present invention;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of area A;

[0021] Figure 4 Schematic diagram of the internal structure of the guide rail of the present invention;

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0023] Figure 6 This is a schematic cross-sectional view of the trigger box of the present invention;

[0024] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of the middle C area;

[0025] Figure 8 For the present invention Figure 6 Schematic diagram of the enlarged structure of the middle D area;

[0026] Figure 9 This is a schematic cross-sectional view of the actuator housing of the present invention;

[0027] Figure 10 For the present invention Figure 9 Schematic diagram of the enlarged structure of area E in the middle.

[0028] In the figure: 1. Actuator housing; 11. Vent; 2. Sealing mechanism; 21. Sealing rod; 22. Sealing plate; 23. Spring 1; 24. Limiting plate; 25. Limiting groove; 26. Clamping groove; 27. Spring 2; 28. Clamping block; 3. Isolation mechanism; 31. Conductive frame; 32. Guide rail; 33. Conductive rod; 34. Connecting rod; 35. Actuating motor; 36. Trigger box; 37. Trigger rod; 38. Baffle; 39. Electromagnet 1; 310. Electromagnet 2; 311. Screw; 312. Push plate; 313. Lock; 314. Connecting buckle; 315. Retaining ring; 316. Electromagnet 3. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0030] See also Figures 1-10 The present invention provides a technical solution: a modular electromagnetic isolation cavity for an explosion-proof intelligent electric actuator, comprising an actuator housing 1, wherein the actuator housing 1 carries an intelligent electric actuator module, and a ventilation opening 11 is provided on one side of the actuator housing 1;

[0031] A sealing mechanism 2 is located on the inner wall of the vent 11 and includes a sealing rod 21 fixedly connected to the inner wall of the actuator housing 1. A sealing plate 22 is slidably connected to the outer periphery of the sealing rod 21. The sealing plate 22 is located inside the vent 11.

[0032] An isolation mechanism 3 is located inside the actuator housing 1 and includes a conductive frame 31 disposed inside the actuator housing 1. A guide rail 32 is fixedly connected to the periphery of the conductive frame 31. A conductive rod 33 is slidably connected above the conductive frame 31. The conductive rod 33 is located inside the guide rail 32 and is slidably connected to the guide rail 32.

[0033] The present invention can, when the actuator housing 1 explodes due to motor overload or short circuit, use the impact force generated by the explosion inside the actuator housing 1 to seal the vent 11 of the actuator housing 1 through the sealing mechanism 2, isolate the combustion-supporting gas, and prevent the intelligent electric actuator module inside the actuator housing 1 from burning, wherein the intelligent electric actuator module is not shown in the figure, to avoid the spread of fire. At the same time, the sealing mechanism 2 drives the isolation mechanism 3 to isolate the electric actuator module, which can suppress electromagnetic interference, reduce electromagnetic leakage, and at the same time reduce secondary damage, limit the release of explosion energy inside the cavity, reduce damage to surrounding equipment and personnel, and reduce economic losses and safety risks caused by accidents.

[0034] The sealing mechanism 2 includes a spring 1 23 fixedly connected to the inner wall of the actuator housing 1, and one end of the spring 1 23 away from the actuator housing 1 is fixedly connected to the sealing plate 22, and the spring 1 23 is located outside the sealing rod 21;

[0035] The outer wall of the sealing plate 22 is fixedly connected to the limit plate 24, and the inner wall of the actuator housing 1 is provided with a limit groove 25. The limit plate 24 is located inside the limit groove 25 and is slidably connected to the limit groove 25. A clamping groove 26 is provided at the bottom of the limit groove 25. A second spring 27 is fixedly connected to the inner wall of the clamping groove 26. The second spring 27 is fixedly connected to a clamping block 28 at one end away from the bottom of the clamping groove 26. The clamping block 28 is located inside the clamping groove 26 and is slidably connected to the clamping groove 26. The end of the clamping block 28 away from the second spring 27 abuts against the limit plate 24.

[0036] When an explosion occurs due to a short circuit or excessive temperature of electrical components inside the actuator housing 1, the impact force of the explosion inside the actuator housing 1 will impact the sealing plate 22. The sealing plate 22 slides close to the vent 11 and squeezes the spring 1 23. The sealing plate 22 can seal the vent 11 and isolate the combustion-supporting gas, so that the combustion conditions cannot be reached inside the actuator housing 1, and at the same time, the fire and flames inside the actuator housing 1 are prevented from jumping out. When the sealing plate 22 slides, the sealing plate 22 drives the limiting plate 24 to slide inside the limiting groove 25. When the limiting plate 24 passes over the clamping block 28, the clamping block 28 is stretched and ejected by the spring 2 27, so that the limiting plate 24 abuts the front of the clamping block 28 and turns to abut the side of the clamping block 28. At this time, the spring 1 23 cannot lift the sealing plate 22, thereby realizing the sealing plate 22 sealing the actuator housing 1.

[0037] The isolation mechanism 3 includes a connecting rod 34 fixedly connected to one end of the sealing plate 22 close to the conductive frame 31, and an end of the connecting rod 34 away from the sealing plate 22 is fixedly connected to the conductive frame 31;

[0038] The upper end of the conductive frame 31 is fixedly connected to an actuator motor 35, one end of the actuator motor 35 is fixedly connected to a trigger box 36, a trigger rod 37 is slidably connected inside the trigger box 36, and the trigger rod 37 is fixedly connected to the end away from the trigger box 36 to a baffle 38, and the baffle 38 is close to the inner wall of the actuator housing 1;

[0039] The trigger rod 37 is fixedly connected to an electromagnet 1 39 at one end away from the baffle 38, and the inner wall of the trigger box 36 is fixedly connected to an electromagnet 2 310. The electromagnet 1 39 and the electromagnet 2 310 are respectively connected to the circuit of the actuator motor 35;

[0040] The actuator motor 35 is provided with a screw rod 311 at one end away from the trigger box 36. The screw rod 311 is rotatably connected to the conductive frame 31. The screw rod 311 is located inside the guide rail 32. A push plate 312 is provided on the periphery of the screw rod 311. The push plate 312 is threadedly connected to the screw rod 311. The push plate 312 is located above the conductive frame 31 and is slidably connected to the conductive frame 31.

[0041] One end of the push plate 312 is fixedly connected to a lock buckle 313, and the end of the lock buckle 313 away from the push plate 312 is provided with multiple connecting buckles 314, each of the connecting buckles 314 is movably connected to each other, and the connecting buckles 314 are rotatably connected to the lock buckle 313, and the conductive rod 33 is fixedly connected to the connecting buckle 314;

[0042] The end of the screw rod 311 away from the actuator motor 35 is fixedly connected to a retaining ring 315, and the end of the retaining ring 315 close to the screw rod 311 is fixedly connected to an electromagnet 316, and the electromagnet 316 is connected to the actuator motor 35 circuit.

[0043] When the sealing plate 22 slides, the sealing plate 22 drives the conductive frame 31 to slide through the connecting rod 34, and the trigger box 36 located above the conductive frame 31 drives the trigger rod 37 to move toward the inner wall of the actuator housing 1. When the baffle 38 at the end of the trigger rod 37 abuts the actuator housing 1, due to the continuous sliding of the trigger box 36, the trigger rod 37 can slide into the inside of the trigger box 36, so that the electromagnet 1 39 at the end of the trigger rod 37 fits with the electromagnet 2 310 on the inner wall of the trigger box 36. Since the electromagnet 1 39 and the electromagnet 2 310 are respectively connected to the circuit of the actuator motor 35, the actuator motor 35 is started at this time, and the actuator motor 35 can drive the screw rod 311 to rotate. When the screw rod 311 rotates, it can drive the pushing plate 312 outside the screw rod 311 to slide. When the pushing plate 312 slides, it can drive the connecting buckle 314 located inside the guide rail 32 to move. Since the connecting buckle 314 is composed of multiple movable buckles connected in series, the connecting buckle 314 can still slide smoothly at the right angle of the guide rail 32 until the pushing plate 312 slides to the end of the screw rod 311. The pushing plate 312 contacts the electromagnet 316, and the execution motor 35 is powered off. At this time, the connecting buckle 314 slides from a horizontal state to a vertical state, and the conductive rod 33 between the connecting buckles 314 and the conductive frame 31 are combined into a Faraday cage, which can be used as an electromagnetic isolation cavity.

[0044] A Faraday cage can shield against external electromagnetic interference. It uses conductive materials to guide external electromagnetic fields to the surface, forming an equipotential area, thereby preventing electromagnetic waves from entering the interior.

[0045] According to Gauss's law, the electric field flux through any closed surface is equal to the total charge enclosed by that surface divided by the dielectric constant of a vacuum. A Faraday cage is made of conductive material. When in electrostatic equilibrium, the free charges within the conductor redistribute, making the electric field strength inside the conductor zero everywhere. The shielding principle of a Faraday cage is that when an external electric field acts on the Faraday cage, the free charges on the conductor's surface redistribute, generating an induced electric field in the opposite direction of the external electric field. The induced electric field and the external electric field cancel each other out inside the conductor, keeping the electric field strength inside the conductor constant, thus achieving electromagnetic shielding.

[0046] The working principle and use process of the present invention are as follows: when an explosion occurs due to a short circuit or excessive temperature of electrical components inside the actuator housing 1, the explosion impact force inside the actuator housing 1 will impact the sealing plate 22, and the sealing plate 22 slides close to the vent 11 and squeezes the spring 1 23, so that the sealing plate 22 can seal the vent 11. When the sealing plate 22 slides, the sealing plate 22 drives the limiting plate 24 to slide inside the limiting groove 25. When the limiting plate 24 passes the clamping block 28, the clamping block 28 is stretched out by the spring 27, so that the limiting plate 24 The front of the abutting clamping block 28 turns to the side of the abutting clamping block 28. At this time, the spring 1 23 cannot lift the sealing plate 22, thereby realizing the sealing plate 22 to seal the actuator housing 1. When the sealing plate 22 slides, the sealing plate 22 drives the conductive frame 31 to slide through the connecting rod 34. The trigger box 36 located above the conductive frame 31 drives the trigger rod 37 to move toward the inner wall of the actuator housing 1. When the baffle 38 at the end of the trigger rod 37 abuts the actuator housing 1, the trigger box 36 continues to slide, and the trigger rod 37 can slide into the trigger box 36. The first electromagnet 39 at the end of the trigger rod 37 fits with the second electromagnet 310 on the inner wall of the trigger box 36. Since the first electromagnet 39 and the second electromagnet 310 are respectively connected to the circuit of the execution motor 35, the execution motor 35 is started at this time, and the execution motor 35 can drive the screw rod 311 to rotate. When the screw rod 311 rotates, it can drive the push plate 312 outside the screw rod 311 to slide. When the push plate 312 slides, it can drive the connecting buckle 314 located inside the guide rail 32 to move. Since the connecting buckle 314 is composed of multiple movable buckles in series, At the right angle of the guide rail 32, the connecting clip 314 can still slide smoothly until the push plate 312 slides to the end of the screw rod 311. The push plate 312 contacts the electromagnet 316, and the execution motor 35 is powered off. At this time, the connecting clip 314 slides from a horizontal state to a vertical state. The conductive rod 33 and the conductive frame 31 between the connecting clips 314 are combined to form a Faraday cage. The Faraday cage can shield external electromagnetic interference. The Faraday cage guides the external electromagnetic field to the surface through the conductive material, forming an equipotential area, thereby preventing electromagnetic waves from entering the interior.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated 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 invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A modular electromagnetic isolation chamber for an explosion-proof intelligent electric actuator, comprising: An actuator housing (1), wherein the actuator housing (1) carries an intelligent electric actuator module, and a ventilation opening (11) is provided on one side of the actuator housing (1); It is characterized by further comprising: A sealing mechanism (2), the sealing mechanism (2) being located on the inner wall of the vent (11), the sealing mechanism (2) comprising a sealing rod (21) fixedly connected to the inner wall of the actuator housing (1), a sealing plate (22) being slidably connected to the periphery of the sealing rod (21), and the sealing plate (22) being located inside the vent (11); An isolation mechanism (3) is located inside the actuator housing (1), and the isolation mechanism (3) includes a conductive frame (31) disposed inside the actuator housing (1), a guide rail (32) being fixedly connected to the periphery of the conductive frame (31), a conductive rod (33) being slidably connected above the conductive frame (31), and the conductive rod (33) being located inside the guide rail (32) and slidably connected to the guide rail (32).

2. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 1 is characterized by: The sealing mechanism (2) comprises a spring (23) fixedly connected to the inner wall of the actuator housing (1); one end of the spring (23) away from the actuator housing (1) is fixedly connected to the sealing plate (22); and the spring (23) is located outside the sealing rod (21).

3. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 2 is characterized by: The outer wall of the sealing plate (22) is fixedly connected to the limiting plate (24); the inner wall of the actuator housing (1) is provided with a limiting groove (25); the limiting plate (24) is located inside the limiting groove (25) and is slidably connected to the limiting groove (25); a clamping groove (26) is provided at the bottom of the limiting groove (25); a spring 2 (27) is fixedly connected to the inner wall of the clamping groove (26); an end of the spring 2 (27) away from the bottom of the clamping groove (26) is fixedly connected to a clamping block (28); the clamping block (28) is located inside the clamping groove (26) and is slidably connected to the clamping groove (26); and an end of the clamping block (28) away from the spring 2 (27) abuts against the limiting plate (24).

4. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 1, characterized in that: The isolation mechanism (3) comprises a connecting rod (34) fixedly connected to one end of the sealing plate (22) close to the conductive frame (31), and the end of the connecting rod (34) away from the sealing plate (22) is fixedly connected to the conductive frame (31).

5. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 4 is characterized in that: An actuator motor (35) is fixedly connected to the upper end of the conductive frame (31), a trigger box (36) is fixedly connected to one end of the actuator motor (35), a trigger rod (37) is slidably connected inside the trigger box (36), a baffle (38) is fixedly connected to one end of the trigger rod (37) away from the trigger box (36), and the baffle (38) is close to the inner wall of the actuator housing (1).

6. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 5, characterized in that: The trigger rod (37) is fixedly connected to an electromagnet 1 (39) at one end away from the baffle (38), and the inner wall of the trigger box (36) is fixedly connected to an electromagnet 2 (310). The electromagnet 1 (39) and the electromagnet 2 (310) are respectively connected to the circuit of the execution motor (35).

7. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 6, characterized in that: A screw rod (311) is provided at one end of the actuator motor (35) away from the trigger box (36), the screw rod (311) is rotatably connected to the conductive frame (31), the screw rod (311) is located inside the guide rail (32), a push plate (312) is provided on the periphery of the screw rod (311), the push plate (312) is threadedly connected to the screw rod (311), the push plate (312) is located above the conductive frame (31) and is slidably connected to the conductive frame (31).

8. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 7, characterized in that: One end of the push plate (312) is fixedly connected to a lock buckle (313), and one end of the lock buckle (313) away from the push plate (312) is provided with a plurality of connecting buckles (314), each of the connecting buckles (314) is movably connected to each other, the connecting buckles (314) and the lock buckle (313) are rotatably connected, and the conductive rod (33) is fixedly connected to the connecting buckle (314).

9. The modular electromagnetic isolation chamber for explosion-proof intelligent electric actuator according to claim 8, characterized in that: The end of the screw rod (311) away from the execution motor (35) is fixedly connected to a retaining ring (315), and the end of the retaining ring (315) close to the screw rod (311) is fixedly connected to an electromagnet (316). The electromagnet (316) is connected to the circuit of the execution motor (35).

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