Electric actuating mechanism

Abstract

The utility model discloses an electric actuating mechanism. The electric actuating mechanism comprises an electric cabinet cylinder body, a control switch arranged on the electric cabinet cylinder body, and a protection device, the protection device comprises a first base arranged on the electric cabinet cylinder in a sleeving mode and a cover plate used for protecting the control switch. The cover plate is connected with the first base and can turn over between a first position and a second position relative to the first base, and at the first position, the cover plate covers a control switch on the electric actuating mechanism to play a role in protecting the control switch and prevent the control switch from being accidentally touched by personnel; and at the second position, the cover plate is positioned on one side of the control switch on the electric actuating mechanism, so that the control switch on the electric actuating mechanism is exposed, and personnel can overhaul the electric actuating mechanism, watch a display screen or operate the control switch and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to an electric actuator. Background Art

[0002] Electric valves usually include electric actuators and valves. Electric actuators are a mechanism used to control the rotation or movement of valve stems, thereby controlling the opening and closing of valves. They are often installed on the valve body and linked with the valve stem. The controller sends a control signal to drive the valve to open or close to a specified position, thus realizing the automatic operation of the valve.

[0003] Most of the electric valves used in the conventional island of a nuclear power plant are intelligent electric valves, which have built-in integrated circuit boards. Personnel can set valve-related functional parameters and operate valve movements by operating the operating knobs on the cylinder of the electric control box of the electric actuator; the Rotork-IQ3 generation electric valves currently commonly used in nuclear power plants have two plastic operating knobs on the operating panel of the electric control box cylinder. During the use of the electric valve, there have been cases where personnel accidentally touched the operating knobs and the operating knobs were damaged by collisions: during the overhaul of the nuclear power plant, the cleaning staff accidentally touched the operating knob when wiping the equipment; when the service support staff were setting up scaffolding, the steel pipe collided with the operating knob, causing the current position of the operating knob to change, thereby triggering an alarm in the main control room, which has an adverse effect on the safety and stability of the operation of the nuclear power plant units. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an improved electric actuator, which can prevent the control switch on the electric actuator from being accidentally touched by people.

[0005] The technical solution adopted by the utility model to solve the technical problem is: to provide an electric actuator, which includes an electric control box cylinder, a control switch arranged on the electric control box cylinder, and a protective device;

[0006] The protection device comprises a first base sleeved on the cylinder of the electric control box and a cover plate for protecting the control switch;

[0007] The cover plate is connected to the first base and flipped between a first position and a second position relative to the first base, wherein in the first position, the cover plate covers the control switch; in the second position, the cover plate is located on one side of the control switch, exposing the control switch.

[0008] Preferably, the electric actuator further comprises at least two connecting components, each of which is connected between the cover plate and the first base.

[0009] Preferably, each of the connecting components comprises a second base and a rotating shaft;

[0010] The second base is connected to the first base;

[0011] One end of the rotating shaft is rotatably connected to the second base, and the other end is fixedly connected to the cover plate.

[0012] Preferably, each of the connection components further comprises at least two positioning members arranged between the second base and the cover plate;

[0013] At least two positioning members are respectively arranged on two opposite sides of the rotating shaft, and are respectively in contact with the cover plate when in the first position and the second position.

[0014] Preferably, the positioning member is a ball-end screw passing through the second base.

[0015] Preferably, the first base is provided with at least two through holes, and the electric actuator further comprises at least two screw rods and at least two screws;

[0016] At least two reserved bolt holes are provided on the cylinder of the electric control box, the first end of each of the screw rods is connected to one of the reserved bolt holes, and the second end of each of the screw rods penetrates into the through hole;

[0017] Each of the screws passes through the through hole and is connected to the second end of the screw rod.

[0018] Preferably, the cover plate and the first base are detachably connected.

[0019] Preferably, the first base is in a circular ring shape.

[0020] Preferably, a notch is provided on the cover plate.

[0021] Preferably, the first base is an aluminum alloy base; and / or

[0022] The cover plate is an aluminum alloy cover plate.

[0023] The utility model has at least the following beneficial effects: when the cover is in the first position, the control switch on the cylinder of the electric control box is covered, thereby protecting the control switch and preventing the control switch from being accidentally touched by personnel; when the cover is in the second position, the control switch on the cylinder of the electric control box is exposed, so that personnel can inspect the electric actuator, view the display screen, or operate the control switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1It is a structural schematic diagram of an electric control box cylinder of an electric actuator according to an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 The front structural diagram of the electric control box cylinder is shown;

[0027] Figure 3 It is a side structural schematic diagram of an electric actuator according to an embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of an electric actuator according to an embodiment of the utility model when its cover plate is located at a first position;

[0029] Figure 5 It is a structural schematic diagram of an electric actuator according to an embodiment of the utility model when its cover plate is located at the second position;

[0030] Figure 6 yes Figure 4 The enlarged structural diagram of part A in the middle;

[0031] Figure 7 yes Figure 4 A schematic diagram of the exploded structure of the protection device of the electric actuator shown in the figure from a side view;

[0032] Figure 8 yes Figure 4 A schematic diagram of the exploded structure of the protection device of the electric actuator shown in the front view. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0034] See also Figures 1 to 4 The electric actuator of one embodiment of the utility model comprises an electric control box body 3, a control switch 4 arranged on one end surface of the electric control box body 3, and a protection device installed on the electric control box body 3. Figure 1 This is a schematic diagram of the structure without protective devices installed on the cylinder 3 of the electric control box. Figure 3 3 is a schematic diagram of the side structure of the protective device installed on the electric control box cylinder 3. The protective device can be detachably installed on the electric control box cylinder 3 to protect the control switch 4 and prevent the control switch 4 from being directly exposed to the external environment, thereby preventing the control switch 4 from being accidentally touched by a person as described in the background art. Figure 1 and Figure 2As shown, taking the Rotork-IQ3 generation electric valve as an example, the control switch 4 is two operating knobs. It can be understood that the electric actuator of the utility model is not limited to the Rotork-IQ3 generation electric valve, but can also be other types of electric valves. The control switch 4 on other types of electric valves is not limited to two operating knobs, but can also be other types of switches, such as buttons, etc.

[0035] like Figure 3 and Figure 4 In the illustrated embodiment, the protection device comprises a first base 1 and a cover plate 2. The cover plate 2 is used to protect the control switch 4 on the electric control box cylinder 3. The first base 1 is sleeved on the electric control box cylinder 3 to provide a mounting base for the cover plate 2.

[0036] The cover plate 2 is connected to the first base 1 and can be flipped between a first position and a second position relative to the first base 1. Figure 4 As shown, in the first position, the cover plate 2 covers the control switch 4 on the electric control box cylinder 3, thereby protecting the control switch 4 and preventing the control switch 4 from being accidentally touched by a person. At this time, the cover plate 2 is flipped down. Figure 5 As shown, in the second position, the cover plate 2 is located on one side of the control switch 4 on the cylinder 3 of the electric control box, so that the control switch 4 on the cylinder 3 of the electric control box is exposed, and at this time, the cover plate 2 is flipped up. In the second position, personnel can inspect the cylinder 3 of the electric control box, or operate the control switch 4, etc. Therefore, after the protective device is installed on the cylinder 3 of the electric control box, there is no need to remove the protective device, and only the cover plate 2 needs to be flipped to the second position to meet the equipment maintenance work of the electric actuator.

[0037] Therefore, the utility model has at least the following beneficial effects: the cover plate 2 covers the control switch 4 on the electric control box cylinder 3 in the first position, thereby protecting the control switch 4 and preventing the control switch 4 from being accidentally touched by personnel; when the cover plate 2 is in the second position, the control switch 4 on the electric control box cylinder 3 is exposed, and personnel can inspect the electric control box cylinder 3, view the display screen 8, or operate the control switch 4, etc. After the protective device is installed on the electric actuator, it does not need to be removed to meet the equipment inspection work of the electric actuator.

[0038] like Figure 4 and Figure 5 In the embodiment shown, the first base 1 is annular, so that it can be matched with the cylindrical structure of the electric control box cylinder 3. Further, the first base 1 and / or the cover plate 2 can be made of aluminum alloy, specifically, it can be made of aluminum alloy material that has been hard-oxidized. Aluminum alloy has the characteristics of high strength, impact resistance and light weight. Further, the outer edge contour of the cover plate 2 is matched with the outer edge contour of the base, and both are arc-shaped. Please refer to Figure 8A notch 21 may be provided on the cover plate 2, so that the cover plate 2 is roughly U-shaped. When the cover plate 2 is flipped to the second position, the notch 21 may expose a portion of the display screen 8 for easy observation by personnel.

[0039] Specifically, the flipping and fixing of the cover plate 2 relative to the first base 1 can be achieved in the following ways:

[0040] like Figure 4 and Figure 6 In the illustrated embodiment, the protection device further comprises two connecting components 5, each connecting component 5 being connected between the cover plate 2 and the first base 1, and being used to connect the cover plate 2 and the first base 1. Figure 4 For example, two connection components 5 can be symmetrically arranged. It can be understood that in other embodiments, the number of connection components 5 is not limited to two, and can also be three, four, etc.

[0041] In some embodiments, the cover plate 2 and the first base 1 may be detachably connected, and the provision of the connecting component 5 may facilitate the assembly and disassembly between the cover plate 2 and the first base 1 .

[0042] Furthermore, if Figure 6 In the illustrated embodiment, each connecting component 5 includes a second base 52 and a rotating shaft 51. The second base 52 is connected to the first base 1. The second base 52 may be detachably connected to the first base 1. One end of the rotating shaft 51 is rotatably connected to the second base 52, and the other end is fixedly connected to the cover plate 2. Specifically, a first through hole is provided on the second base 52 at a position corresponding to the rotating shaft 51, one end of the rotating shaft 51 is inserted into the first through hole, and the other end of the rotating shaft 51 is fixedly connected to the cover plate 2. Thus, when a person moves the cover plate 2, the cover plate 2 and the rotating shaft 51 rotate together relative to the second base 52 (or the first base 1), and the cover plate 2 can thus be flipped back and forth between the first position and the second position. Figure 6 For example, two second bases 52 can be symmetrically arranged on the first base 1 .

[0043] Furthermore, if Figure 6 In the illustrated embodiment, each connecting assembly 5 further includes two positioning members 53 disposed between the second base 52 and the cover plate 2. The two positioning members 53 are disposed at two opposite sides of the rotating shaft 51, i.e., at the upper and lower sides of the rotating shaft 51, and the two positioning members 53 abut against the cover plate 2 in the first position and the second position, respectively. Figure 6 For example, the upper positioning member 53 abuts against the cover plate 2 when the cover plate 2 is flipped up to the second position, and the lower positioning member 53 abuts against the cover plate 2 when the cover plate 2 is flipped down to the first position. Figure 4 and Figure 5As shown, the left and right sides of the cover plate 2 are respectively in contact with the positioning members 53, so that the cover plate 2 is clamped and fixed between the two positioning members 53 on the left and right sides. Therefore, when the cover plate 2 is flipped to the first position or the second position, the cover plate 2 can be fixed in the first position or the second position. However, in other embodiments, the number of positioning members 53 is not limited to two, and can also be three, four, etc.

[0044] Preferably, the positioning member 53 is detachably connected to the second base 52. When the cover plate 2 is in the first position, the lower positioning member 53 is installed on the second base 52 to fix the cover plate 2. When the position of the cover plate 2 needs to be changed, the lower positioning member 53 is removed, and then the cover plate 2 is flipped up to the second position, and the upper positioning member 53 is installed on the second base 52 to fix the cover plate 2. Of course, in other embodiments, the cover plate 2 can be flipped to the first position (or the second position) first, and then the positioning member 53 can be installed in the gap between the cover plate 2 and the second base 52, which also plays the role of fixing the cover plate 2.

[0045] Specifically, a second through hole may be provided on the surface of the cover plate 2 facing the second base 52 , so that when the cover plate 2 is flipped to a corresponding position, the positioning member 53 extends into the second through hole, thereby positioning the cover plate 2 more firmly.

[0046] Furthermore, if Figure 6 In the embodiment shown, the positioning member 53 is a ball screw that penetrates the second base 52. Specifically, the ball screw is a hexagonal ball screw. The surface of the cover plate 2 facing the second base 52 is perpendicular to the ball screw. Figure 6 For example, a ball screw is transversely arranged on the second base 52. The ball screw includes a shell, a steel ball located at one end of the shell, and a spring arranged inside the shell, and the outer periphery of the shell is provided with threads. A third through hole is provided on the second base 52, and the third through hole penetrates the second base 52. The ball screw transversely passes through the third through hole, and the steel ball can abut against the surface of the cover plate 2 facing the second base 52. The tightness between the ball screw and the cover plate 2 can be adjusted by screwing the ball screw.

[0047] Specifically, the installation between the first base 1 and the electric actuator can be achieved in the following ways:

[0048] like Figure 7 As shown, at least two through holes 10 are provided on the first base 1, and the protection device further includes at least two screw rods 60 and at least two screws 61. The screw rods 60 and the screws 61 are respectively located at two opposite sides of the first base 1. The screw rod 60 has a first end 601 and a second end 602. The first end 601 of each screw rod 60 is connected to the reserved bolt hole 7 (see FIG. Figure 1 and Figure 2), and the second end 602 penetrates into the through hole 10 on the first base 1. Each screw 61 penetrates into the through hole 10 on the first base 1 and is connected to the second end 602 of the screw rod 60. Specifically, the second end 602 of each screw rod 60 has a fourth through hole, and each screw 61 penetrates into the through hole 10 on the first base 1 and is threadedly connected with the fourth through hole on the second end 602 of the screw rod 60.

[0049] That is, if Figure 1 and Figure 2 As shown, at least two reserved bolt holes 7 are provided on the electric control box body 3 , and the first base 1 can be installed on the electric control box body 3 through the reserved bolt holes 7 and the screw rods 60 . Taking the Rotork-IQ3 electric valve as an example, since its electric control box cylinder 3 is provided with two reserved bolt holes 7 for removing the cylinder installation top screws, the protective device can be installed with the help of the two reserved bolt holes 7. Specifically, the first ends 601 of the two screw rods 60 are respectively connected to the two reserved bolt holes 7, and the two through holes 10 on the first base 1 are respectively sleeved on the outer periphery of the second ends 602 of the two screw rods 60, and then the two screws 61 are respectively inserted into the two through holes 10 on the first base 1 and the fourth through hole on the second end 602 of the screw rod 60. Thus, the first base 1 can be smoothly installed on the electric control box cylinder 3 by means of the two reserved bolt holes 7 on the electric control box cylinder 3, and there is no need to perform additional structural modification on the electric control box cylinder 3, so as not to interfere with the original structure of the electric control box cylinder 3. When installing the protective device, the electric control box cylinder 3 does not need to be shut down, and non-destructive installation can be achieved.

[0050] like Figure 8 In the illustrated embodiment, the protective device is a split structure, which is divided into four parts: the first base 1, the cover plate 2, the screw 60, and the screw 61. The split protective device is conducive to the installation of the protective device in a narrow space, and is particularly suitable for the limited on-site installation space of a nuclear power plant. In addition, after the installation of each component is completed, the protective device and the electric control box cylinder 3 form a rigid whole with mechanical hard connection, good vibration resistance, and the protective device is not easy to fall off, which can effectively resist the collision of metal objects such as steel pipes. In addition, the cover plate 2 can be flipped between the first position and the second position, which does not hinder the maintenance of the electric control box cylinder 3 and does not hinder the operation of the control knob by personnel. When the equipment needs to be repaired, there is no need to remove the protective device. The fastening parts such as the screw 60, the screw 61, and the positioning member 53 can be made of 304 stainless steel, which has corrosion resistance. The threaded connection of the fastening parts such as the screw 60, the screw 61, and the positioning member 53 can be reinforced with thread glue to prevent loosening.

[0051] like Figure 4 and Figure 5 As shown, text and other indication information can be formed on the cover plate by engraving, printing, etc. Figure 4As shown, in the first position, the cover plate faces the operator with its front side, and the front side of the cover plate is engraved with the text instruction information "operating knob upward buckle" and the arrow pattern instruction information, prompting the operator to flip the cover plate upward to expose the operating switch. Figure 5 As shown, in the second position, the cover faces the operator with its back, and the back of the cover is engraved with text instructions of "Flip down to cover the knob" and arrow pattern instructions, indicating that the operator can flip the cover down to cover the operating switch.

[0052] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. An electric actuator, characterized in that: It comprises an electric control box body (3), a control switch (4) arranged on the electric control box body (3), and a protection device; The protection device comprises a first base (1) sleeved on the electric control box cylinder (3) and a cover plate (2) for protecting the control switch (4); The cover plate (2) is connected to the first base (1) and is flipped between a first position and a second position relative to the first base (1), wherein in the first position, the cover plate (2) covers the control switch (4); and in the second position, the cover plate (2) is located on one side of the control switch (4), exposing the control switch (4).

2. The electric actuator according to claim 1, characterized in that: The protection device further comprises at least two connection components (5), each of the connection components (5) being connected between the cover plate (2) and the first base (1).

3. The electric actuator according to claim 2, characterized in that: Each of the connecting components (5) comprises a second base (52) and a rotating shaft (51); The second base (52) is connected to the first base (1); One end of the rotating shaft (51) is rotatably connected to the second base (52), and the other end is fixedly connected to the cover plate (2).

4. The electric actuator according to claim 3, characterized in that: Each of the connecting components (5) further comprises at least two positioning members (53) arranged between the second base (52) and the cover plate (2); At least two positioning members (53) are respectively arranged on two opposite sides of the rotating shaft (51), and are in contact with the cover plate (2) when in the first position and the second position respectively.

5. The electric actuator according to claim 4, characterized in that: The positioning member (53) is a ball screw that penetrates the second base (52).

6. The electric actuator according to claim 1, characterized in that: The first base (1) is provided with at least two through holes (10), and the electric actuator further comprises at least two screw rods (60) and at least two screws (61); At least two reserved bolt holes (7) are provided on the electric control box cylinder (3), the first end of each of the screw rods (60) is connected to one of the reserved bolt holes (7), and the second end of each of the screw rods (60) penetrates into the through hole (10); Each of the screws (61) passes through the through hole (10) and is connected to the second end of the screw rod (60).

7. The electric actuator according to claim 1, characterized in that: The cover plate (2) and the first base (1) are detachably connected.

8. The electric actuator according to claim 1, characterized in that: The first base (1) is in the shape of a ring.

9. The electric actuator according to claim 1, characterized in that: The cover plate (2) is provided with a notch (21).

10. The electric actuator according to claim 1, characterized in that: The first base (1) is an aluminum alloy base; and / or The cover plate (2) is an aluminum alloy cover plate.

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