A nuclear power plant airtight door equipped with dual-drive redundant actuators

Abstract

This utility model relates to a nuclear power plant airtight door equipped with a dual-drive redundant actuator, comprising a door frame with two gates horizontally sliding within the door frame; and a dual-drive redundant actuator, which includes two drive motors fixed within the door frame and a bidirectional threaded rod disposed between the output shafts of the two drive motors, the bidirectional threaded rod being threadedly engaged with the two gates; by setting up the dual-drive redundant actuator, the drive motors can drive the bidirectional threaded rod to rotate, causing the two gates to slide towards each other, facilitating the opening or closing of the gates; by setting up two drive motors connected to the bidirectional threaded rod, it is convenient that if one drive motor fails, the other drive motor can be used to drive the gates to open or close, thus reducing the probability of the gates failing to open or close due to drive motor failure.

Description

Technical Field

[0001] This utility model relates to the field of airtight doors for nuclear power plants, and in particular to an airtight door for nuclear power plants equipped with a dual-drive redundant actuator. Background Technology

[0002] Nuclear power plants offer advantages such as high power output, low pollution, and long-lasting power generation, making them increasingly popular in many countries. However, because nuclear power plants generate electricity through the fission of nuclear materials, many of their facilities are radioactive. This radioactivity not only pollutes the environment but also harms human health. Therefore, nuclear power plants must install airtight valves in their ventilation systems to control the release of radioactive materials.

[0003] A search revealed a nuclear power plant ventilation door with publication number CN215443759U. The ventilation door includes a door frame, a first magnetic sealing plate, a roller groove, and a first gate and a second gate slidably installed within the roller groove. The lower end of the first gate has a first roller, and the lower end of the second gate has a second roller. The first gate has multiple first fixing holes, and the second gate has multiple second fixing holes. The door frame has multiple third fixing holes. The first gate is fixed by a first fixing member passing through the first and third fixing holes. The second gate is fixed by a second fixing member passing through the second and third fixing holes. The first magnetic sealing plate is rotatably connected to the first gate, and the end of the first magnetic sealing plate away from the first gate is attached to and seals the second gate. This invention provides a nuclear power plant ventilation door that is convenient to open and close, simple to operate, and highly safe.

[0004] When the device in the disclosed patent is in use, the gate is supported by rollers. After a period of use, the rollers and the bottom surface of the inner wall of the gate frame slide will wear down, which will cause the gate to move down. This can easily cause the fixing holes on the gate to misalign with the fixing holes on the gate frame, thus making it impossible to fix the gate. Utility Model Content

[0005] In response to the technical problem in existing patents where the rollers support the gate's movement during use, wear occurs on the inner bottom surface of the rollers and the gate frame slide after a period of use, causing the gate to shift downwards and easily leading to misalignment between the fixing holes on the gate and the fixing holes on the gate frame, thus making the gate unable to be fixed, this utility model provides a nuclear power plant airtight door equipped with a dual-drive redundant actuator.

[0006] The technical solution adopted in this utility model is: a nuclear power plant airtight door equipped with a dual-drive redundant actuator, comprising: A door frame, within which two gates slide horizontally; A dual-drive redundant actuator includes two drive motors fixed inside the gate frame and a bidirectional threaded rod disposed between the output shafts of the two drive motors. The bidirectional threaded rod is threadedly engaged with the two gates. Multiple support mechanisms are provided, each of which is fixed to the bottom end of one of the two gates. Each support mechanism includes a telescopic mechanism fixed to the bottom end of the gate, a roller seat fixed to the bottom end of the telescopic mechanism, and a support roller rotatably fitted within the roller seat.

[0007] Furthermore, the telescopic mechanism includes a polygonal guide cylinder fixed to the bottom end of the gate, a fixed plate fixed to the upper part of the polygonal guide cylinder, a polygonal support column slidably fitted to the lower part of the polygonal guide cylinder, a threaded column rotatably fitted to the fixed plate and threadedly fitted to the polygonal support column, and a transmission column rotatably fitted to the side of the polygonal guide cylinder, wherein the threaded column meshes with the transmission column, and the roller seat is fixed to the bottom end of the polygonal support column.

[0008] Furthermore, the upper end of the threaded column is provided with a first bevel gear, and the transmission column is fixedly sleeved with a second bevel gear. The first bevel gear meshes with the second bevel gear. The bottom end of the fixed plate is embedded with a first bearing. The outer side of the upper end of the threaded column is provided with a smooth surface. The upper end of the threaded column is fixed in the first bearing. The polygonal guide cylinder is embedded with second bearings on both opposite sides. The two ends of the transmission column are respectively fixed in the two second bearings.

[0009] Furthermore, one end of the transmission column is provided with a limiting plate, and one end of the limiting plate is threaded with a Torx handle screw. The side of the polygonal guide cylinder has a plurality of positioning grooves corresponding to the Torx handle screw.

[0010] Furthermore, each of the two gates has multiple first fixing holes on its horizontally opposite sides, the gate frame has a second fixing hole corresponding to the first fixing hole on its side, the gates have multiple third fixing holes on their upper and lower sides, and the gate frame has multiple fourth fixing holes corresponding to the third fixing holes on its side.

[0011] Furthermore, both horizontally adjacent ends of the two gates are provided with sealing protrusions, which form an L-shaped structure with the gates. The gate frame is a U-shaped frame structure, and a slide rail is provided on one side of the gate frame. The gate is slidably fitted in the slide rail, and the drive motor is fixed on the top surface of the inner wall of the slide rail. A maintenance door is rotatably fitted on one side of the gate.

[0012] The beneficial effects of this utility model are: By setting up a dual-drive redundant actuator, it is easy for the drive motor to drive the bidirectional threaded rod to rotate, thereby causing the two gates to slide towards each other, which facilitates the opening or closing of the gates. By setting up two drive motors connected to the bidirectional threaded rod, it is easy to use the other drive motor to drive the gate to open or close when one drive motor fails, which reduces the probability of the gates failing to open or close due to drive motor failure. By setting up a support mechanism, when the first fixing hole on the gate is misaligned with the second fixing hole on the gate frame, the gate is lifted up by a jack, and the limit plate is rotated to drive the transmission column to rotate, which in turn drives the polygonal support column, roller seat, and support roller to slide vertically, so that the support roller re-contacts the bottom surface of the inner wall of the slide, making it easier to re-support the gate through the support roller, so that the first fixing hole on the gate is aligned with the second fixing hole on the gate frame, thereby improving the service life of the gate and the gate frame; By setting a limit plate and a Torx handle screw, it is easy to rotate the Torx handle screw into the positioning groove, positioning the limit plate, and preventing the threaded column from being subjected to axial force, which would cause the threaded column to rotate and the gate to move downward. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the gate in this utility model; Figure 4 This is a cross-sectional structural diagram of the support mechanism in this utility model.

[0014] The diagram is marked as follows: 1. Door frame; 101. Gate; 102. First fixing hole; 103. Second fixing hole; 104. Third fixing hole; 105. Fourth fixing hole; 106. Sealing protrusion; 107. Slide rail; 108. Inspection door; 2. Dual-drive redundant actuator; 201. Drive motor; 202. Bidirectional threaded rod; 3. Support mechanism; 301. Telescopic mechanism; 3010. Positioning groove; 3011. Polygonal guide cylinder; 3012. Fixing plate; 3013. Polygonal support column; 3014. Threaded column; 3015. Transmission column; 3016. First bevel gear; 3017. Second bevel gear; 3018. Limiting plate; 3019. Torx handle screw; 302. Roller seat; 303. Support roller. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described below.

[0018] To address the problems existing in the background art, this application proposes the following technical solution: A nuclear power plant airtight door equipped with a dual-drive redundant actuator includes: Door frame 1, with two gates 101 horizontally sliding inside door frame 1; The dual-drive redundant actuator 2 includes two drive motors 201 fixed inside the gate frame 1 and a bidirectional threaded rod 202 located between the output shafts of the two drive motors 201. The bidirectional threaded rod 202 is threadedly engaged with the two gates 101. Multiple support mechanisms 3 are fixed at the bottom ends of the two gates 101 respectively. Each support mechanism 3 includes a telescopic mechanism 301 fixed at the bottom end of the gate 101, a roller seat 302 fixed at the bottom end of the telescopic mechanism 301, and a support roller 303 rotatably engaged in the roller seat 302.

[0019] Furthermore, the telescopic mechanism 301 includes a polygonal guide cylinder 3011 fixed to the bottom of the gate 101, a fixed plate 3012 fixed to the upper part of the polygonal guide cylinder 3011, a polygonal support column 3013 slidably engaged with the lower part of the polygonal guide cylinder 3011, a threaded column 3014 rotatably engaged with the fixed plate 3012 and threadedly engaged with the polygonal support column 3013, and a transmission column 3015 rotatably engaged with the side of the polygonal guide cylinder 3011. The threaded column 3014 meshes with the transmission column 3015, and the roller seat 302 is fixed to the bottom of the polygonal support column 3013.

[0020] Furthermore, the upper end of the threaded column 3014 is provided with a first bevel gear 3016, and the transmission column 3015 is fixedly sleeved with a second bevel gear 3017. The first bevel gear 3016 meshes with the second bevel gear 3017. The bottom end of the fixing plate 3012 is embedded with a first bearing. The outer side of the upper end of the threaded column 3014 is provided with a smooth surface. The upper end of the threaded column 3014 is fixed in the first bearing. The polygonal guide cylinder 3011 has second bearings embedded on both sides. The two ends of the transmission column 3015 are respectively fixed in the two second bearings.

[0021] Furthermore, a limiting plate 3018 is provided at one end of the transmission column 3015, and a Torx handle screw 3019 is threaded onto one end of the limiting plate 3018. Multiple positioning grooves 3010 corresponding to the Torx handle screw 3019 are arranged in a circular array on the side of the polygonal guide cylinder 3011.

[0022] Furthermore, each of the two gates 101 has multiple first fixing holes 102 on its horizontally opposite sides, and the side of the gate frame 1 has a second fixing hole 103 corresponding to the first fixing hole 102. Each of the upper and lower sides of the gate 101 has multiple third fixing holes 104, and the side of the gate frame 1 has multiple fourth fixing holes 105 corresponding to the third fixing holes 104. This allows the gates 101 to be fixed to the gate frame 1 by inserting bolts into the first fixing holes 102 and the second fixing holes 103 and using nuts to fix the gates 101 in the closed state. The gates 101 can also be fixed to the gate frame 1 by inserting bolts into the third fixing holes 104 and the second fixing holes 103 and using nuts to fix the gates 101 in the open or closed state.

[0023] Furthermore, both horizontally adjacent ends of the two gates 101 are provided with sealing protrusions 106, which form an L-shaped structure with the gates 101 to improve the sealing performance after the two gates 101 are connected. The gate frame 1 has a U-shaped frame structure, and a slide rail 107 is provided on one side of the gate frame 1. The gate 101 is slidably fitted in the slide rail 107. The drive motor 201 is fixed on the top surface of the inner wall of the slide rail 107. A maintenance door 108 is rotatably fitted on one side of the gate 101.

[0024] Working principle: One of the drive motors 201 is turned on, driving the bidirectional threaded rod 202 to rotate, causing the two gates 101 to slide towards each other, facilitating the opening and closing of the gates 101. By connecting the two drive motors 201 to the bidirectional threaded rod 202, if one drive motor 201 fails, the other drive motor 201 can be used to open or close the gates 101, reducing the probability of the gates 101 failing to open or close due to a drive motor 201 failure. When the first fixing hole 102 on the gate 101 is misaligned with the second fixing hole 103 on the gate frame 1, the inspection door 108 is opened, and the gate 101 is lifted and moved upwards using a jack, aligning the first fixing hole 102 on the gate 101 with the second fixing hole 103 on the gate frame 1. The Torx handle screw 3019 is then turned to unscrew the positioning groove 3. 010. Release the limit on the limiting plate 3018, rotate the limiting plate 3018 to drive the transmission column 3015 to rotate, and through the meshing of the second bevel gear 3017 and the first bevel gear 3016, drive the threaded column 3014 to rotate, and drive the polygonal support column 3013, roller seat 302 and support roller 303 to slide vertically, so that the support roller 303 re-contacts the bottom surface of the inner wall of the slide rail 107. Remove the jack, so that the gate 101 can be re-supported by the support roller 303, so that the first fixing hole 102 on the gate 101 is aligned with the second fixing hole 103 on the gate frame 1. This reduces the probability that the first fixing hole 102 and the second fixing hole 103 on the gate frame 1 will be misaligned due to wear of the support roller 303 and the bottom surface of the inner wall of the slide rail 107, which would cause the gate 101 to fail to be fixed on the gate frame 1, and improves the service life of the gate 101 and the gate frame 1.

[0025] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0026] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A nuclear power plant airtight door equipped with a dual-drive redundant actuator, characterized in that, include: Door frame (1), and two gates (101) are horizontally sliding inside the door frame (1); The dual-drive redundant actuator (2) includes two drive motors (201) fixed inside the gate frame (1) and a bidirectional threaded rod (202) located between the output shafts of the two drive motors (201). The bidirectional threaded rod (202) is threadedly engaged with the two gates (101). Multiple support mechanisms (3) are fixed at the bottom of the two gates (101) respectively. Each support mechanism (3) includes a telescopic mechanism (301) fixed at the bottom of the gate (101), a roller seat (302) fixed at the bottom of the telescopic mechanism (301), and a support roller (303) rotatably fitted in the roller seat (302).

2. A nuclear power plant airtight door with a dual-drive redundant actuator as described in claim 1, characterized in that, The telescopic mechanism (301) includes a polygonal guide cylinder (3011) fixed to the bottom end of the gate (101), a fixed plate (3012) fixed to the upper part of the polygonal guide cylinder (3011), a polygonal support column (3013) slidably engaged with the lower part of the polygonal guide cylinder (3011), a threaded column (3014) rotatably engaged with the fixed plate (3012) and threadedly engaged with the polygonal support column (3013), and a transmission column (3015) rotatably engaged with the side of the polygonal guide cylinder (3011). The threaded column (3014) meshes with the transmission column (3015), and the roller seat (302) is fixed to the bottom end of the polygonal support column (3013).

3. A nuclear power plant airtight door with a dual-drive redundant actuator as described in claim 2, characterized in that, The upper end of the threaded column (3014) is provided with a first bevel gear (3016), and the transmission column (3015) is fixedly sleeved with a second bevel gear (3017). The first bevel gear (3016) meshes with the second bevel gear (3017).

4. A nuclear power plant airtight door with a dual-drive redundant actuator as described in claim 2, characterized in that, The transmission column (3015) is provided with a limiting plate (3018) at one end, and a Torx handle screw (3019) is threaded onto one end of the limiting plate (3018). The polygonal guide cylinder (3011) has a plurality of positioning grooves (3010) arranged in a circular array on its side, corresponding to the Torx handle screw (3019).

5. A nuclear power plant airtight door with a dual-drive redundant actuator as described in claim 1, characterized in that, The two gates (101) are provided with multiple first fixing holes (102) on both horizontally opposite sides. The gate frame (1) is provided with a second fixing hole (103) corresponding to the first fixing hole (102) on its side. The gates (101) are provided with multiple third fixing holes (104) on both the upper and lower sides. The gate frame (1) is provided with multiple fourth fixing holes (105) corresponding to the third fixing hole (104) on its side.

6. A nuclear power plant airtight door with a dual-drive redundant actuator as described in claim 1, characterized in that, The two gates (101) are horizontally adjacent at both ends and are provided with sealing protrusions (106). The sealing protrusions (106) and the gates (101) form an L-shaped structure. The gate frame (1) is a U-shaped frame structure. A slide rail (107) is provided on one side of the gate frame (1). The gate (101) is slidably fitted in the slide rail (107). The drive motor (201) is fixed on the top surface of the inner wall of the slide rail (107).

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