Nuclear power station containment personnel airlock interlocking device

Abstract

The invention relates to the technical field of nuclear power station safety systems, and discloses a nuclear power station containment personnel air lock interlocking device which comprises a transmission shaft, one end of the transmission shaft is an operation end, the other end of the transmission shaft is a linkage end, and a first locking bolt is arranged on an inner door body or an outer door body corresponding to the operation end. The operation end is used for being driven and driving the transmission shaft to rotate after the first locking bolt is inserted into the first fixing seat, a second locking bolt is arranged on the outer door body or the inner door body corresponding to the linkage end, and the linkage end is used for locking or unlocking the second locking bolt inserted into the second fixing seat under the driving of the transmission shaft. According to the nuclear power station containment personnel air lock interlocking device, the state of the first locking plug pin is switched, the transmission shaft is driven to rotate, then the second locking plug pin is locked or unlocked, the interlocking function that whether the other door body can be opened or not is controlled through the state of one door body is achieved, the structure is simple and stable, and the use requirement of a personnel air lock is met.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant safety system technology, and in particular to a personnel gate interlocking device for the containment gate of a nuclear power plant. Background Technology

[0002] The containment building is the structure that encloses the reactor and some important equipment. It is an important barrier to prevent the leakage of radioactive materials and protects the internal equipment from external events. Personnel exits are important penetrations of the nuclear power plant containment building, allowing personnel to safely enter and exit the containment building during the construction, operation, and shutdown of the nuclear power plant without compromising the containment building's sealing performance. Therefore, personnel exits are designed with a double-door structure, including an inner door and an outer door. Each door has an interlocking device to ensure that the door interlocks (unlocks) during opening (closing) and that at least one door is normally closed, thereby effectively preventing accidental leakage of radioactive materials.

[0003] Patent CN204081751U discloses a personnel gate interlocking structure, which uses a ratchet structure for interlocking. The disadvantage of this structure is that the ratchet is directional and the transmission logic needs to have a strict matching relationship, otherwise the interlocking will fail. In addition, the transmission shaft connecting the inner and outer doors has multiple transmission stages, poor synchronization, and the structure is relatively complex, occupies a large space, and has a high failure rate. Therefore, technical improvements are needed. Summary of the Invention

[0004] Based on the above, the purpose of this invention is to provide a nuclear power plant containment personnel gate interlocking device that simplifies the overall structure and accurately realizes the interlocking function of the inner and outer doors of the personnel gate.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A nuclear power plant containment personnel gate interlocking device is used to interlock the inner door body and the outer door body on the containment door frame. The nuclear power plant containment personnel gate interlocking device includes a drive shaft, one end of which passes through one of the inner door body and the outer door body and forms an operating end, and the other end of which passes through the other of the inner door body and the outer door body and forms a linkage end.

[0007] The inner or outer door body corresponding to the operating end is provided with a first locking pin, and the safety shell door frame is provided with a first fixed seat that is engaged with the first locking pin. The operating end is used to be driven and drive the transmission shaft to rotate after the first locking pin is inserted into the first fixed seat.

[0008] The outer or inner door body corresponding to the linkage end is provided with a second locking pin, and the safety shell door frame is provided with a second fixed seat that is engaged with the second locking pin. The linkage end is used to lock or unlock the second locking pin inserted into the second fixed seat under the drive of the transmission shaft.

[0009] As an optional solution, the operating end is provided with a transmission block, which is located on the movement trajectory of the first locking pin, and the transmission block and the first locking pin are distributed at both ends of the first fixed seat. The transmission block is used to be lifted after the first locking pin is inserted into the first fixed seat.

[0010] As an alternative, an adjusting screw is screwed into the transmission block, and the screwing depth of the adjusting screw is adjustable, with the end of the first locking pin abutting against the head of the adjusting screw.

[0011] As an alternative, a torsion spring is fitted onto the drive shaft, which provides a restoring force to the drive block as it continuously rotates to the first locking pin.

[0012] As an alternative, a locking block is provided on one side of the second fixed seat. The locking block can be inserted into the second fixed seat, and the insertion direction of the locking block is perpendicular to the movement direction of the second locking pin. The second locking pin is provided with a locking groove, and a transmission component is provided at the linkage end. The transmission component is used to convert the rotation of the transmission shaft into a driving force on the locking block, so that the locking block engages with the locking groove to lock or unlock after the second locking pin is inserted into the second fixed seat.

[0013] As an alternative, the transmission assembly includes a gear fixed coaxially with the transmission shaft and a rack that meshes with the gear. The rack is fixedly connected to a locking block, and the locking block has a travel groove for the transmission shaft to pass through.

[0014] As an alternative, a penetration sleeve is provided on the containment door frame, and a bushing is provided between the drive shaft and the penetration sleeve.

[0015] As an alternative, the inner and outer ring surfaces of the bushing are respectively provided with mounting grooves, and a sealing ring is provided in the mounting groove.

[0016] As an alternative, the outer ring surface of the bushing is provided with an annular groove, the bottom of the annular groove is provided with a through hole extending to the inner ring surface of the bushing, sealing rings are provided on both sides of the annular groove and on both sides of the opening of the through hole, and an airtightness detection port is provided on the through sleeve, which is connected to the annular groove.

[0017] As an optional solution, there are two drive shafts. The operating end of the first drive shaft passes through the inner door body, and the linkage end of the first drive shaft passes through the outer door body, so as to lock the outer door body from the inner door body. The operating end of the second drive shaft passes through the outer door body, and the linkage end of the second drive shaft passes through the inner door body, so as to lock the inner door body from the outer door body.

[0018] The beneficial effects of this invention are:

[0019] The personnel gate interlocking device of the nuclear power plant containment structure drives the rotation of the drive shaft by switching the state of the first locking pin, thereby locking or unlocking the second locking pin. This achieves the interlocking function that controls whether the other gate can be opened by the state of one gate. The structure is simple and stable, and meets the requirements for the use of personnel gates. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the personnel gate interlocking device for the containment of a nuclear power plant provided in an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Sectional view at point AA;

[0022] Figure 3 yes Figure 1 A viewpoint from the B-axis;

[0023] Figure 4 This is a schematic diagram of the structure of the passage section in the personnel gate interlocking device of the nuclear power plant containment provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the installation of the personnel gate interlock device on the containment vessel of a nuclear power plant, as provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the state of the operating end of the drive shaft of the nuclear power plant containment personnel gate interlocking device provided in this embodiment of the invention when the first locking pin is not locked;

[0026] Figure 7 This is a schematic diagram of the state of the linkage end of the drive shaft of the nuclear power plant containment personnel gate interlocking device provided in the embodiment of the present invention when the first locking pin is not locked;

[0027] Figure 8 This is a schematic diagram of the state of the operating end of the drive shaft of the nuclear power plant containment personnel gate interlocking device provided in this embodiment of the invention when the first locking pin is locked;

[0028] Figure 9 This is a schematic diagram of the state of the linkage end of the drive shaft of the nuclear power plant containment personnel gate interlocking device provided in the embodiment of the present invention when the first locking pin is locked.

[0029] In the attached image:

[0030] 1. Drive shaft; 2. Operating end; 3. Linkage end; 4. First locking pin; 5. First fixed seat; 6. Second locking pin; 7. Second fixed seat; 8. Transmission block; 9. Adjusting screw; 10. Torsion spring; 11. Locking block; 12. Locking groove; 13. Gear; 14. Rack; 15. Stroke groove; 16. Through-chamber sleeve; 17. Bushing; 18. Sealing ring; 19. Annular groove; 20. Through hole; 21. Air tightness test port; 22. Containment door frame. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 the present invention.

[0035] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0036] Please see Figures 1 to 5As shown, this embodiment provides a nuclear power plant containment personnel gate interlocking device for interlocking the inner and outer door bodies on the containment door frame 22.

[0037] The personnel gate interlocking device of the containment of the nuclear power plant includes a drive shaft 1. One end of the drive shaft 1 passes through one of the inner door body and the outer door body and forms an operating end 2. The other end of the drive shaft 1 passes through the other of the inner door body and the outer door body and forms a linkage end 3.

[0038] The inner or outer door body corresponding to the operating end 2 is provided with a first locking pin 4, and the safety shell door frame 22 is provided with a first fixed seat 5 that is engaged with the first locking pin 4. The operating end 2 is used to be driven and drive the transmission shaft 1 to rotate after the first locking pin 4 is inserted into the first fixed seat 5.

[0039] The outer or inner door body corresponding to the linkage end 3 is provided with a second locking pin 6, and the safety shell door frame 22 is provided with a second fixing seat 7 that is engaged with the second locking pin 6. The linkage end 3 is used to lock or unlock the second locking pin 6 inserted into the second fixing seat 7 under the drive of the transmission shaft 1.

[0040] Therefore, by switching the state of the first locking pin 4, the drive shaft 1 is rotated, thereby locking or unlocking the second locking pin 6, realizing the interlocking function that controls whether the other door can be opened by the state of one door. The structure is simple and stable, and meets the requirements for the use of personnel gates.

[0041] For details, see Figure 2 and Figure 6 The operating end 2 is provided with a transmission block 8, which is located on the movement trajectory of the first locking pin 4. The transmission block 8 and the first locking pin 4 are distributed at both ends of the first fixed seat 5. The transmission block 8 is used to be lifted after the first locking pin 4 is inserted into the first fixed seat 5.

[0042] Thus, while the first locking pin 4 is inserted into the first fixed seat 5 to lock, it drives the transmission shaft 1 to rotate through the transmission block 8. The transmission shaft 1 then drives the linkage end 3 to move, thereby realizing the locking or unlocking function of the second locking pin 6.

[0043] Furthermore, an adjusting screw 9 is screwed into the transmission block 8, and the screwing depth of the adjusting screw 9 is adjustable. The end of the first locking pin 4 abuts against the head of the adjusting screw 9.

[0044] The length of the adjusting screw 9 inserted into the first locking pin 4 can be adjusted according to the actual situation, so that the transmission block 8 can rotate at a reasonable angle after being driven by the first locking pin 4, and accurately drive the linkage end 3 to move.

[0045] When the first locking pin 4 is pulled out of the first fixed seat 5, the transmission block 8 and the transmission shaft 1 should return to their initial angle, thereby driving the linkage end 3 to return to its original position. The return of the transmission block 8 can be achieved by its own weight, or a torsion spring 10 can be sleeved on the transmission shaft 1. The torsion spring 10 is used to provide the transmission block 8 with a continuous return force to the first locking pin 4, ensuring the accurate position of the transmission block 8 and reducing the probability of the return block getting stuck.

[0046] For details, see Figure 3 and Figure 7 A locking block 11 is provided on one side of the second fixed seat 7. The locking block 11 can be inserted into the second fixed seat 7, and the insertion direction of the locking block 11 is perpendicular to the moving direction of the second locking pin 6. A locking groove 12 is provided on the second locking pin 6. A transmission component is provided on the linkage end 3. The transmission component is used to convert the rotation of the transmission shaft 1 into a driving force on the locking block 11, so that the locking block 11 can lock or unlock after the second locking pin 6 is inserted into the second fixed seat 7 and engages with the locking groove 12.

[0047] Therefore, the rotation of the transmission block 8 can be converted into the extension and retraction of the locking block 11, and then the locking block 11 cooperates with the locking groove 12 to realize the locking or unlocking function of the second locking pin 6.

[0048] Furthermore, the transmission assembly includes a gear 13 fixed coaxially with the transmission shaft 1 and a rack 14 that meshes with the gear 13. The rack 14 is fixedly connected to the locking block 11, and the locking block 11 has a travel groove 15 for the transmission shaft 1 to pass through.

[0049] The rotational motion of the transmission shaft 1 is converted into the linear motion of the locking block 11 by the gear 13 and the rack 14, thereby realizing power transmission and stroke control of the locking block 11, and completing the unlocking and locking actions of the linkage end 3.

[0050] Optionally, such as Figure 4 As shown, a through-cabin sleeve 16 is provided on the containment door frame 22, and a bushing 17 is provided between the drive shaft 1 and the through-cabin sleeve 16.

[0051] In the original structure, the through-sleeve 16 and the drive shaft 1 are in direct contact. Under long-term use, the drive shaft 1 is prone to locking up. By adding a bushing 17, the direct contact between the through-sleeve 16 and the drive shaft 1 can be avoided.

[0052] Because the personnel gate must be airtight, the inner and outer ring surfaces of the bushing 17 are respectively provided with mounting grooves, and a sealing ring 18 is installed in the mounting groove.

[0053] Furthermore, the outer ring surface of the bushing 17 is provided with an annular groove 19, and the bottom of the annular groove 19 is provided with a through hole 20 that extends to the inner ring surface of the bushing 17. Sealing rings 18 are provided on both sides of the annular groove 19 and on both sides of the opening of the through hole 20. An airtightness detection port 21 is provided on the through sleeve 16, and the airtightness detection port 21 is connected to the annular groove 19. The airtightness detection port 21 can be used to detect whether the drive shaft 1 is sealed in real time.

[0054] To achieve the function of internal and external linkage, at least two drive shafts 1 are provided. This embodiment will be described using two drive shafts 1 as an example. Figure 5 As shown, the operating end 2 of the first drive shaft 1 passes through the inner door body, and the linkage end 3 of the first drive shaft 1 passes through the outer door body, realizing the interlocking of the outer door body from the inner door body; the operating end 2 of the second drive shaft 1 passes through the outer door body, and the linkage end 3 of the second drive shaft 1 passes through the inner door body, realizing the interlocking of the inner door body from the outer door body.

[0055] Combination Figures 6 to 9 Taking the interlocking of the inner door with the outer door as an example, the specific principle is as follows:

[0056] ① When the first locking pin 4 on the inner door body corresponding to the first drive shaft 1 is not locked, the locking block 11 on the first drive shaft 1 is held in the locking groove 12 of the second locking pin 6 on the outer door body under the action of the torsion spring 10. At this time, the inner door body can be opened, but the second locking pin 6 cannot be pulled out, and the outer door body cannot be unlocked and opened.

[0057] ② When the first locking pin 4 on the inner door body corresponding to the first drive shaft 1 is inserted into the first fixed seat 5 to lock, the drive block 8 on the first drive shaft 1 is pushed out, driving the drive shaft 1 to rotate, which in turn drives the lock block 11 to disengage from the lock groove 12, so that the second locking pin 6 can be freely inserted and removed. At this time, the inner door body is locked and the outer door body is unlocked, and the door can be opened.

[0058] Similarly, the inner door can be interlocked from the outer door through the linkage of the second drive shaft 1, which will not be elaborated here.

[0059] In summary, the containment personnel gate interlocking device of this nuclear power plant has the following advantages:

[0060] 1) The structure is simple, stable and reliable. The interlocking is achieved by rotating the drive shaft 1 to drive the locking block 11. The operation is simple.

[0061] 2) The interlocking logic is simple, not prone to errors, and does not involve complex logical direction matching;

[0062] 3) Only one drive shaft 1 is needed for one interlocking system, resulting in fewer parts, a compact structure, good synchronization, and a direct power transmission path;

[0063] 4) The bushing 17 prevents the drive shaft 1 from directly contacting the drive shaft 1 and the drive shaft sleeve 16, ensuring the safety of the drive shaft 1 and preventing lock-up failure.

[0064] 5) Multiple sealing rings 18 are installed at bushing 17 to ensure the airtightness of the personnel gate, and airtightness can be detected in real time through airtightness detection port 21 to ensure safety in use.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A nuclear power plant containment personnel gate interlocking device, used to interlock the inner and outer door bodies on the containment door frame (22), characterized in that, The nuclear power plant containment personnel gate interlocking device includes a drive shaft (1), one end of which passes through one of the inner door body and the outer door body to form an operating end (2), and the other end of which passes through the other of the inner door body and the outer door body to form a linkage end (3). The operating end (2) is provided with a first locking pin (4) on the inner door body or the outer door body corresponding to it, and a first fixed seat (5) is provided on the safety shell door frame (22) to cooperate with the first locking pin (4). The operating end (2) is used to be driven and drive the transmission shaft (1) to rotate after the first locking pin (4) is inserted into the first fixed seat (5). The linkage end (3) is provided with a second locking pin (6) on the outer door body or the inner door body corresponding to the outer door body, and a second fixing seat (7) is provided on the safety shell door frame (22) to cooperate with the second locking pin (6). The linkage end (3) is used to lock or unlock the second locking pin (6) inserted into the second fixing seat (7) under the drive of the transmission shaft (1).

2. The nuclear power plant containment personnel gate interlocking device according to claim 1, characterized in that, The operating end (2) is provided with a transmission block (8), which is located on the movement trajectory of the first locking pin (4). The transmission block (8) and the first locking pin (4) are distributed at both ends of the first fixed seat (5). The transmission block (8) is used to be lifted after the first locking pin (4) is inserted into the first fixed seat (5).

3. The nuclear power plant containment personnel gate interlocking device according to claim 2, characterized in that, An adjusting screw (9) is screwed into the transmission block (8), and the screwing depth of the adjusting screw (9) is adjustable. The end of the first locking pin (4) abuts against the head of the adjusting screw (9).

4. The nuclear power plant containment personnel gate interlocking device according to claim 2, characterized in that, A torsion spring (10) is sleeved on the drive shaft (1), and the torsion spring (10) is used to give the drive block (8) a restoring force to continuously turn to the first locking pin (4).

5. The nuclear power plant containment personnel gate interlocking device according to claim 1, characterized in that, A locking block (11) is provided on one side of the second fixed seat (7). The locking block (11) can be inserted into the second fixed seat (7), and the insertion direction of the locking block (11) is perpendicular to the moving direction of the second locking pin (6). A locking groove (12) is provided on the second locking pin (6). A transmission component is provided on the linkage end (3). The transmission component is used to convert the rotation of the transmission shaft (1) into a driving force on the locking block (11), so that the locking block (11) engages with the locking groove (12) to lock or unlock after the second locking pin (6) is inserted into the second fixed seat (7).

6. The nuclear power plant containment personnel gate interlocking device according to claim 5, characterized in that, The transmission assembly includes a gear (13) fixed coaxially with the transmission shaft (1) and a rack (14) that meshes with the gear (13). The rack (14) is fixedly connected to the locking block (11), and the locking block (11) has a travel groove (15) for the transmission shaft (1) to pass through.

7. The nuclear power plant containment personnel gate interlocking device according to claim 1, characterized in that, A hatch sleeve (16) is provided on the containment door frame (22), and a bushing (17) is provided between the drive shaft (1) and the hatch sleeve (16).

8. The nuclear power plant containment personnel gate interlocking device according to claim 7, characterized in that, The inner and outer ring surfaces of the bushing (17) are respectively provided with mounting grooves, and a sealing ring (18) is provided in the mounting groove.

9. The nuclear power plant containment personnel gate interlocking device according to claim 8, characterized in that, The outer ring surface of the bushing (17) is provided with an annular groove (19), and the bottom of the annular groove (19) is provided with a through hole (20) that extends to the inner ring surface of the bushing (17). Sealing rings (18) are provided on both sides of the annular groove (19) and on both sides of the opening of the through hole (20). An airtightness detection port (21) is provided on the through sleeve (16), and the airtightness detection port (21) is connected to the annular groove (19).

10. The nuclear power plant containment personnel gate interlocking device according to claim 1, characterized in that, The transmission shaft (1) is provided in two parts. The operating end (2) of the first transmission shaft (1) passes through the inner door body, and the linkage end (3) of the first transmission shaft (1) passes through the outer door body, so as to lock the outer door body from the inner door body. The operating end (2) of the second transmission shaft (1) passes through the outer door body, and the linkage end (3) of the second transmission shaft (1) passes through the inner door body, so as to lock the inner door body from the outer door body.

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