A locking device for a handle of a personnel gate interlock mechanism of a nuclear power plant and a locking method thereof

Abstract

The application provides a locking device and a locking method for a handle of a personnel gate interlocking mechanism of a nuclear power plant, and the locking device comprises two fixed supports and a baffle assembly. Each fixed support is provided with a transverse groove and two longitudinal grooves between the transverse groove and the bottom surface of the fixed support. The two transverse grooves on the two fixed supports are respectively used for fixing and mounting I-shaped steels on both sides of the handle. The baffle assembly comprises a baffle connecting piece and two baffles parallel to each other, both ends of each baffle are fixedly connected to the longitudinal grooves of the two fixed supports, and the baffle connecting piece is used for fixedly connecting the two baffles and fixing the bottom of the handle. By arranging the fixed supports and the baffle assembly in the locking device, the I-shaped steels on both sides of the handle are fixed by the fixed supports, the bottom of the handle is fixed by the baffle assembly, the effective fixation of the handle of the personnel gate interlocking mechanism is realized, and the problem that the personnel gate interlocking mechanism is prone to loosening is solved.

Description

Technical Field

[0001] This application belongs to the technical field of handle locking of interlocking mechanism of personnel gate in nuclear power plant, and specifically relates to a locking device and locking method for the handle of interlocking mechanism of personnel gate in nuclear power plant. Background Technology

[0002] Personnel gates are part of the third barrier in a nuclear power plant, designed to prevent the spread of radioactive contaminants. Their primary function is to allow personnel and small equipment to pass through the containment vessel during reactor operation or hot shutdown without compromising its sealing function.

[0003] When the containment vessel is in an isolated state, the interlocking mechanism keeps both the inner and outer sealing doors in the closed position during normal operation. Equipment functionality requires that the inner and outer doors not be opened simultaneously to ensure the containment vessel's airtightness. The interlocking mechanism achieves this purpose mechanically.

[0004] There are two sets of interlocking mechanisms, each consisting of a ratchet, pawl, a sliding rod bracket for operating the pawl, a manual clutch, and a chain drive. When one door is opened, the locking bolt on the locking device is pulled out of the locking bracket, and the sliding rod on the sliding rod bracket is unrestrained. The sliding rod then moves within the sliding rod bracket under the force of a spring, pushing the pawl to lock the ratchet, preventing it from rotating. The drive rod connected to the ratchet passes through the door frame (the ratchet for the outer door is inside the cabin) and locks the sprocket synchronized with the shaft. This sprocket then locks the main drive shaft of the other door, thus restricting both automatic and manual operation of the other door, preventing its operation and achieving the interlocking purpose. When the containment is released from isolation, the interlocking is released by operating the manual clutch.

[0005] However, due to the lack of a fixing device for the manual clutch of the interlocking mechanism, there have been multiple instances where the manual clutch of the interlocking mechanism disengaged during operation, causing the interlocking of the inner and outer doors of the personnel gate to fail and triggering operational incidents. Summary of the Invention

[0006] In view of this, the present application aims to provide a locking device and locking method for the handle of the interlocking mechanism of a personnel gate in a nuclear power plant. By setting a fixed support and a baffle assembly in the locking device, the fixed support is used to fix the I-beams on both sides of the handle, and the baffle assembly is used to fix the bottom of the handle, so as to solve the problem that the personnel gate interlocking mechanism is easy to disengage under stress and vibration during operation.

[0007] The first aspect of this application provides a locking device for the handle of a personnel gate interlocking mechanism in a nuclear power plant. The locking device includes two fixed supports and a baffle assembly. Each fixed support has a transverse groove and two longitudinal grooves located between the transverse groove and the bottom surface of the fixed support. The two transverse grooves on the two fixed supports are used to fix the I-beams on both sides of the handle. The baffle assembly includes a baffle connector and two parallel baffles. The two ends of each baffle are fixedly connected to the longitudinal grooves of the two fixed supports. The baffle connector is used to fix the two baffles together and to fix the bottom of the handle.

[0008] In one specific embodiment of this application, the locking device further includes a plurality of positioning screws. Each fixed support is also provided with at least one positioning screw hole extending from the top surface of the fixed support to the transverse groove. The number of positioning screws is the same as the number of positioning screw holes on the two fixed supports. After the I-beams on both sides of the handle are installed on the two transverse grooves on the two fixed supports, the I-beams on both sides of the handle are fixed by the plurality of positioning screws.

[0009] In one specific embodiment of this application, the baffle connector includes a threaded stop pin and a wing nut. The threaded stop pin passes through a through hole in the middle of the two baffles, and the portion of the threaded stop pin extending out of the two baffles is screwed into the wing nut for locking.

[0010] In one specific embodiment of this application, the locking device further includes a plurality of hexagon socket head cap screws. Lateral through holes are also provided on both sides of the portion of the fixed support located between the lateral groove and the bottom surface of the fixed support. After both baffles are inserted into the longitudinal grooves of the two fixed supports, the plurality of hexagon socket head cap screws are screwed into the corresponding lateral through holes to fix the two ends of the two baffles.

[0011] In one specific embodiment of this application, the baffle is U-shaped.

[0012] The second aspect of this application provides a locking method for the handle of a nuclear power plant personnel gate interlocking mechanism. The locking method includes: fixing the I-beams on both sides of the handle to the transverse grooves of two fixed supports in the locking device of the nuclear power plant personnel gate interlocking mechanism handle as provided in the first aspect of this application; fixing two baffles in the baffle assembly of the locking device to the longitudinal grooves of the two fixed supports; moving the handle to put the personnel gate in an interlocked state, and using the baffle connector in the baffle assembly to fix the two baffles and the bottom of the handle, so that the handle is in a non-movable state; when the personnel gate needs to be de-interlocked, removing the baffle connector, so that the handle is in a movable state.

[0013] In one specific embodiment of this application, the above-mentioned fixing of the I-beams on both sides of the handle to the transverse grooves of the two fixed supports in the locking device of the handle of the interlocking mechanism handle for a nuclear power plant personnel gate provided in the first aspect of this application includes: fixing the I-beams on both sides of the handle to the transverse grooves of the two fixed supports in the locking device of the handle of the interlocking mechanism handle for a nuclear power plant personnel gate provided in the first aspect of this application; and inserting the plurality of positioning screws in the locking device into the corresponding positioning screw holes on the two fixed supports to fix the I-beams on both sides of the handle.

[0014] In one specific embodiment of this application, fixing the two baffles in the baffle assembly of the locking device to the longitudinal grooves of the two fixed supports includes: inserting the two baffles in the baffle assembly of the locking device vertically into the longitudinal grooves of the two fixed supports; and screwing the plurality of hexagonal socket bolts in the locking device into the corresponding transverse through holes in the two fixed supports to fix the two baffles.

[0015] The beneficial effects of the above-mentioned solution in this application are as follows: By setting a fixed support and a baffle assembly in the locking device, the fixed support secures the I-beams on both sides of the handle, and the baffle assembly secures the bottom of the handle, thus effectively fixing the handle of the personnel gate interlocking mechanism. This solves the problem of easy loosening of the personnel gate interlocking mechanism, helps improve the reliability of personnel gate operation, and avoids interlocking failure events. Furthermore, this locking device is small in size, lightweight, portable, easy to install, has a simple structure, is low in cost, and highly practical, allowing for convenient on-site installation and use. Attached Figure Description

[0016] Figure 1 The diagram shows the structure of the personnel gate interlocking mechanism in a nuclear power plant.

[0017] Figure 2 The image shown is a schematic diagram of the personnel gate interlocking mechanism in a nuclear power plant.

[0018] Figure 3 The diagram shown is a structural schematic of a locking device for a handle of a personnel gate interlocking mechanism in a nuclear power plant, according to an embodiment of this application.

[0019] Figure 4 The diagram shown is a schematic diagram of the fixed support in different directions of the locking device of the handle of the interlocking mechanism of a nuclear power plant personnel gate according to an embodiment of this application.

[0020] Figure 5 The diagram shown is a schematic diagram of the different directions of the baffle in the locking device of the handle of the interlocking mechanism of a personnel gate in a nuclear power plant according to an embodiment of this application.

[0021] Figure 6The diagram shown is a schematic diagram of different directions of the threaded stop pin in the locking device of the handle of the interlocking mechanism of a nuclear power plant personnel gate according to an embodiment of this application.

[0022] Figure 7 The diagram shown is a schematic flowchart of a locking method for the handle of a personnel gate interlocking mechanism in a nuclear power plant, according to an embodiment of this application.

[0023] Figure 8 The diagram shown is a schematic flowchart of a locking method for the handle of a personnel gate interlocking mechanism in a nuclear power plant, according to another embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. It should be noted that the structure of the personnel gate interlocking mechanism of a nuclear power plant can be referred to... Figure 1 and Figure 2 .

[0025] At least one embodiment of this application provides a locking device for the handle of a personnel gate interlocking mechanism in a nuclear power plant, see reference. Figures 3 to 5 The locking device 100 includes two fixed supports 10 and a baffle assembly 20. Each fixed support 10 has a transverse groove A and two longitudinal grooves B located between the transverse groove A and the bottom surface of the fixed support 10. The two transverse grooves A on the two fixed supports 10 are used to fix the I-beams on both sides of the handle. The baffle assembly 20 includes a baffle connector 21 and two parallel baffles 22. The two ends of each baffle 22 are fixedly connected to the longitudinal grooves B of the two fixed supports 10. The baffle connector 21 is used to fix the two baffles 22 and fix the bottom of the handle.

[0026] It should be noted that the structure of the baffle 22 can be rectangular, U-shaped, or other shapes, as long as it can connect the two fixed supports 10 and cooperate with the handle. Based on this, the embodiments of this application do not make specific limitations in this regard.

[0027] According to the technical solution provided in this application embodiment, by setting a fixed support 10 and a baffle assembly 20 in the locking device 100, the two fixed supports 10 fix the I-beams on both sides of the handle, and the baffle assembly 20 fixes the bottom of the handle, thus effectively fixing the handle of the personnel gate interlocking mechanism. This solves the problem of easy loosening of the personnel gate interlocking mechanism, helps to improve the reliability of the personnel gate operation, and avoids interlocking failure events. In addition, the locking device 100 is small in size, light in weight, easy to carry, simple to install, simple in structure, easy to install, low in cost, and highly practical. It can be easily carried to the site for installation and use.

[0028] The two transverse grooves A on the two fixed supports 10 are used to fix the I-beams on both sides of the handle. Alternatively, the two transverse grooves A on the two fixed supports 10 can accommodate the I-beams on both sides of the handle, and the two transverse grooves A are provided with a snap-fit ​​component to fix the I-beams on both sides of the handle. Or, the two transverse grooves A on the two fixed supports 10 can accommodate the I-beams on both sides of the handle, and the I-beams on both sides of the handle can be fixed by an external device. Alternatively, the structure of the two transverse grooves A can be designed so that the two transverse grooves A can be used to fix the I-beams on both sides of the handle directly.

[0029] For example, in at least one embodiment of this application, reference is made to Figure 3 and Figure 4 The locking device 100 also includes multiple positioning screws. Each fixed support 10 is also provided with at least one positioning screw hole C extending from the top surface of the fixed support 10 to the transverse groove A. The number of positioning screws is the same as the number of positioning screw holes C on both fixed supports 10. After the I-beams on both sides of the handle are installed on the two transverse grooves A on the two fixed supports 10, the I-beams on both sides of the handle are fixed using multiple positioning screws. In this way, by using multiple positioning screws to fix the I-beams on both sides of the handle, the I-beams on both sides of the handle are more firmly fixed.

[0030] For example, the number of multiple positioning screws can be 4, and each fixed support 10 is fixed with 2 positioning screws.

[0031] The baffle connector 21 only needs to be able to fix the two baffles 22 and fix the bottom of the handle. Based on this, the structure of the baffle connector 21 is not specifically limited in the embodiments of this application. For example, in at least one embodiment of this application, referring to Figure 6The baffle connector 21 includes a threaded stop pin 21a and a wing nut. The threaded stop pin 21a passes through the through hole between the two baffles 22, and the portion of the threaded stop pin 21a extending out of the two baffles 22 is screwed into the wing nut for locking. Thus, after the handle is turned to put the gate in the interlocked state, the threaded stop pin 21a is passed through the through hole between the two baffles 22. At this time, the handle is tightly pressed against the threaded stop pin 21a and cannot be turned to the other side, thereby achieving the fixation of the bottom of the handle using the threaded stop pin 21a. Furthermore, by screwing the portion of the threaded stop pin 21a extending out of the two baffles 22 into the wing nut, it is ensured that the threaded stop pin 21a will not fall off the baffles 22, achieving a padlock-like locking mechanism. This ensures that other personnel cannot remove the threaded pin, preventing others from accidentally disconnecting the personnel gate interlock.

[0032] In one specific embodiment of this application, reference is made to Figure 3 and Figure 4 The locking device 100 also includes multiple hexagon socket head cap screws. The fixed support 10 has transverse through holes D on both sides of the portion located between the transverse groove A and the bottom surface of the fixed support 10. After both baffles 22 are inserted into the longitudinal grooves B of the two fixed supports 10, the multiple hexagon socket head cap screws are screwed into the corresponding transverse through holes D to fix the two ends of the two baffles 22. Thus, by using multiple hexagon socket head cap screws screwed into the corresponding transverse through holes D, the two ends of the two baffles 22 are fixed, making the fixation of the two ends of the two baffles 22 more secure.

[0033] For example, the number of multiple hexagon socket head cap screws can be four, and two hexagon socket head cap screws can be used to fix the two baffles 22 on the same side.

[0034] At least one embodiment of this application also provides a locking method for the handle of a nuclear power plant personnel gate interlocking mechanism, which utilizes the locking device 100 for the handle of the nuclear power plant personnel gate interlocking mechanism described in the above embodiments. (See reference...) Figure 7 The locking method includes the following steps.

[0035] S10: Fix the I-beams on both sides of the handle to the transverse grooves of the two fixed supports in the locking device of the handle of the interlocking mechanism of the personnel gate of a nuclear power plant in this embodiment of the application.

[0036] S20: Fix the two baffles in the baffle assembly of the locking device onto the longitudinal grooves of the two fixed supports.

[0037] S30: Move the handle to put the personnel gate in an interlocked state. Use the baffle connector in the baffle assembly to fix the two baffles and the bottom of the handle so that the handle is in an unmovable state.

[0038] S40: When the personnel gate needs to be de-interlocked, remove the baffle connector so that the handle is in a movable state.

[0039] It should be noted that when the handle is in the movable state, the interlock of the personnel gate is released.

[0040] In the locking method provided in at least one embodiment of this application, reference is made to Figure 8 S11 and S12 are specific implementations of step S10 above.

[0041] S11: Install the I-beams on both sides of the handle onto the transverse grooves of the two fixed supports in the locking device of the handle of the interlocking mechanism of a nuclear power plant personnel gate provided in this embodiment of the application.

[0042] S12: Insert the multiple positioning screws in the locking device into the corresponding positioning screw holes on the two fixed supports to fix the I-beams on both sides of the handle.

[0043] In one specific embodiment of this application, reference is made to Figure 8 S21 and S22 are specific implementations of step S20 above.

[0044] S21: Insert the two baffles in the baffle assembly of the locking device vertically into the longitudinal grooves of the two fixed supports.

[0045] S22: Screw the multiple hexagonal socket bolts in the locking device into the corresponding transverse through holes in the two fixed supports to fix the two baffles.

[0046] The above locking method can reliably fix the handle of the personnel gate interlocking mechanism, solving the problem of easy disengagement of the personnel gate interlocking mechanism and ensuring the safety and reliability of the personnel gate during operation.

[0047] The locking method provided in at least one embodiment of this application is implemented using the locking device of the handle of the nuclear power plant personnel gate interlocking mechanism in the above embodiments, and includes the corresponding technical features of the above locking device, which can achieve the corresponding technical effects, and will not be described in detail here.

[0048] It should be noted that the combination of the technical features in the embodiments of this application is not limited to the combination methods described in the embodiments of this application or the combination methods described in specific embodiments. All technical features described in this application can be freely combined or combined in any way, unless they contradict each other.

[0049] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A locking device for the handle of a personnel gate interlocking mechanism in a nuclear power plant, characterized in that, include: Two fixed supports are provided, each of which has a transverse groove and two longitudinal grooves located between the transverse groove and the bottom surface of the fixed support. The two transverse grooves on the two fixed supports are respectively used to fix the I-beams on both sides of the handle. The baffle assembly includes a baffle connector and two parallel baffles. The two ends of each baffle are respectively fixedly connected to the longitudinal grooves of the two fixed supports. The baffle connector is used to fix the two baffles together and fix the bottom of the handle.

2. The locking device according to claim 1, characterized in that, It also includes multiple positioning screws, Each fixed support is provided with at least one positioning screw hole that extends from the top surface of the fixed support to the transverse groove. The number of positioning screws is the same as the number of positioning screw holes on the two fixed supports. After the I-beams on both sides of the handle are installed on the two transverse grooves on the two fixed supports, the I-beams on both sides of the handle are fixed by the multiple positioning screws.

3. The locking device according to claim 1, characterized in that, The baffle connector includes a threaded stop pin and a wing nut. The threaded stop pin passes through a through hole in the middle of the two baffles, and the portion of the threaded stop pin extending out of the two baffles is screwed into the wing nut for locking.

4. The locking device according to claim 1, characterized in that, It also includes multiple hex bolts, The fixed support is provided with transverse through holes on both sides of the portion between the transverse groove and the bottom surface of the fixed support. After both baffles are inserted into the longitudinal grooves of the two fixed supports, multiple hexagonal socket bolts are screwed into the corresponding transverse through holes to fix the two ends of the two baffles.

5. The locking device according to any one of claims 1 to 4, characterized in that, The baffle is U-shaped.

6. A locking method for the handle of a personnel gate interlocking mechanism in a nuclear power plant, characterized in that, include: The I-beams on both sides of the handle are respectively fixedly installed onto the transverse grooves of the two fixed supports in the locking device of the handle of the interlocking mechanism of the personnel gate of a nuclear power plant as described in any one of claims 1 to 5. Two baffles in the baffle assembly of the locking device are fixed to the longitudinal grooves of the two fixed supports; Move the handle to put the personnel gate in an interlocked state, and use the baffle connector in the baffle assembly to fix the two baffles and the bottom of the handle so that the handle is in a non-movable state; When the personnel gate needs to be de-interlocked, the baffle connector is removed so that the handle is in a movable state.

7. The locking method according to claim 6, characterized in that, The I-beams on both sides of the handle are respectively fixedly installed onto the transverse grooves of the two fixed supports in the locking device of the interlocking mechanism handle of the nuclear power plant personnel gate as described in any one of claims 1 to 5, including: The I-beams on both sides of the handle are respectively installed into the transverse grooves of the two fixed supports in the locking device of the handle of the interlocking mechanism of the nuclear power plant personnel gate as described in any one of claims 1 to 5. Insert the multiple positioning screws in the locking device into the corresponding positioning screw holes on the two fixed supports to fix the I-beams on both sides of the handle.

8. The locking method according to claim 6, characterized in that, Fixing two baffles in the baffle assembly of the locking device onto the longitudinal grooves of the two fixed supports includes: The two baffles in the baffle assembly of the locking device are inserted vertically into the longitudinal grooves of the two fixed supports; The multiple hexagonal bolts in the locking device are screwed into the corresponding transverse through holes in the two fixed supports to fix the two baffles.

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