Locking device in nuclear power fireproof valve

Abstract

The utility model discloses a locking device in a nuclear power fire damper, which belongs to the technical field of fire dampers and comprises a fire damper body, a mounting shell is fixedly mounted in the fire damper body, a temperature sensor is fixedly mounted at the bottom end of the mounting shell, an opening and closing mechanism is arranged in the fire damper body, and the opening and closing mechanism is connected with the mounting shell. And a push-pull mechanism is arranged in the mounting shell, and a locking mechanism is arranged in the mounting shell. By arranging the opening and closing mechanism and the push-pull mechanism, when the temperature of the fireproof valve body exceeds a preset value, the temperature sensor controls the electric telescopic rod to start, and the opening and closing plate is driven to rotate by 90 degrees through meshing of the gear and the rack, so that the opening and closing plate is matched with the plugging strip to tightly fit the fireproof valve body, and the fireproof valve body is sealed; by means of the push-pull mechanism and the locking mechanism, when the movable sliding block moves, the spring shell is driven to ascend and descend through the slope block.

Description

Technical Field

[0001] This utility model relates to the field of fire damper technology, and in particular to a locking device in a nuclear power plant fire damper. Background Technology

[0002] In nuclear power plants, fire dampers are key components for ensuring safety. They are used to cut off ventilation or exhaust ducts in emergencies such as fires to prevent the spread of fire. Fire dampers are installed on the supply and return air ducts of ventilation and air conditioning systems. They are normally open and open to exhaust smoke in the event of a fire. When the temperature of the smoke in the exhaust duct reaches a preset temperature, they close, thus playing a role in blocking smoke and fire and preventing the fire protection system from promoting the smoke in the event of a large fire.

[0003] Existing nuclear power plant fire dampers rely on a single mechanical structure for locking devices, lacking redundant self-locking functions. They are prone to loosening due to vibration, impact, or material fatigue, leading to incomplete valve closure or accidental opening, posing significant safety hazards, affecting the reliability of nuclear power plant fire dampers, and failing to meet user needs.

[0004] Therefore, there is an urgent need to provide a locking device for fire dampers in nuclear power plants to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a locking device in a nuclear power plant fireproof valve.

[0006] To solve the above-mentioned technical problems, the present invention provides a locking device for a nuclear power plant fire damper, comprising a fire damper body, an installation shell fixedly installed inside the fire damper body, a temperature sensor fixedly installed at the bottom of the installation shell, an opening and closing mechanism inside the fire damper body, a push-pull mechanism inside the installation shell, and a locking mechanism inside the installation shell.

[0007] The above technical solution allows for the shut-off of ventilation or exhaust ducts in emergency situations such as fires via a fire damper body, and a temperature sensor to detect whether the temperature of the fire damper body exceeds a preset temperature value.

[0008] The present invention is further configured such that: the opening and closing mechanism includes a mounting rack slidably mounted on the bottom wall of the mounting shell; two rotating rods are rotatably mounted inside the mounting shell; one end of each of the two rotating rods is fixedly mounted with a mounting gear; and the outer surfaces of the two mounting gears mesh with one side of the mounting rack.

[0009] Through the above technical solution, the rack and pinion drives two mounting gears to rotate synchronously, and the mounting gears drive the rotating rod to rotate.

[0010] The present invention is further configured such that: opening and closing plates are fixedly installed on the outside of both rotating rods, and sealing strips are fixedly installed on both sides of the inner wall of the fireproof valve body, and one side of the opening and closing plate and one side of the sealing strip are provided with abutting inclined surfaces.

[0011] Through the above technical solution, the rotating rod drives the opening and closing plate to fold ninety degrees, so that the opening and closing plate fits with the sealing strip, thereby opening and closing the fire damper body.

[0012] The present invention is further configured such that: the push-pull mechanism includes a fixed plate fixed to the inner wall of the mounting shell, an electric telescopic rod is fixedly installed at the bottom end of the fixed plate, a movable slider is fixedly installed at one end of the piston rod of the electric telescopic rod, and the two ends of the movable slider are slidably connected to the fixed plate and the mounting rack, respectively.

[0013] Through the above technical solution, the electric telescopic rod drives the movable slider to move. The movable slider moves stably through the fixed plate. The connecting groove between the movable slider and the mounting rack is relatively long, so the mounting rack will be driven to move after moving a certain distance.

[0014] The present invention is further configured such that: an extension plate is fixedly installed on one side of the movable slider, and a rotating wheel is rotatably installed on the top of the extension plate.

[0015] Through the above technical solution, the moving slider drives the extension plate to move, and the extension plate drives the inclined block to rise and fall through the inclined plane via the rotating wheel.

[0016] The present invention is further configured such that: the locking mechanism includes a spring rod slidably installed inside the mounting shell, a ramp block is fixedly installed at the bottom end of the spring rod, and a columnar spring is fixedly installed between the top end of the ramp block and the inner wall of the mounting shell.

[0017] With the above technical solution, the inclined block is stably raised and lowered by a spring rod, and the cylindrical spring drives the inclined block to extend downward through the spring rod.

[0018] The present invention is further configured such that: a spring shell is fixedly installed on one side of the inclined block, a telescopic spring is fixedly installed on the inner wall of the spring shell, and a spring insert plate is fixedly installed on the other end of the telescopic spring.

[0019] Through the above technical solution, the telescopic spring drives the spring insert plate to extend outward from the spring shell, and after one end of the mounting rack moves out, it will limit the movement of one side of the mounting rack.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model is equipped with an opening and closing mechanism and a push-pull mechanism. When the temperature of the fire damper body exceeds the preset value, the temperature sensor controls the electric telescopic rod to start. Through the meshing of the gear and rack, the opening and closing plate is driven to rotate 90 degrees, so that the opening and closing plate and the sealing strip tightly fit the fire damper body, thereby achieving the sealing of the fire damper body and ensuring a good sealing effect.

[0022] 2. This utility model, through a push-pull mechanism and a locking mechanism, enables the movable slider to move by driving the spring shell to rise and fall via the inclined block, thereby fixing the mounting rack and preventing the opening and closing plate from accidentally loosening due to vibration, impact or material fatigue. This improves the convenience of operation and overall performance, and ensures the safety of nuclear power plants. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the fireproof valve body of this utility model;

[0025] Figure 3 This is a diagram showing the internal structure of the mounting shell of this utility model;

[0026] Figure 4 This is an exploded structural diagram of the opening and closing mechanism, the push-pull mechanism, and the locking mechanism of this utility model;

[0027] Figure 5 This is a cross-sectional view of the locking mechanism of this utility model.

[0028] In the diagram: 1. Fire damper body; 2. Mounting housing; 3. Temperature sensor; 4. Opening and closing mechanism; 401. Mounting rack; 402. Rotating rod; 403. Mounting gear; 404. Opening and closing plate; 405. Sealing strip; 5. Push-pull mechanism; 501. Fixing plate; 502. Electric telescopic rod; 503. Moving slider; 504. Extension plate; 505. Rotating wheel; 6. Locking mechanism; 601. Spring rod; 602. Inclined block; 603. Cylindrical spring; 604. Spring housing; 605. Telescopic spring; 606. Spring insert plate. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] Please see Figures 1-5A locking device for a nuclear power plant fire damper includes a fire damper body 1. A mounting shell 2 is fixedly installed inside the fire damper body 1. A temperature sensor 3 is fixedly installed at the bottom end of the mounting shell 2. An opening and closing mechanism 4 is provided inside the fire damper body 1. The opening and closing mechanism 4 includes a mounting rack 401 slidably mounted on the inner bottom wall of the mounting shell 2. Two rotating rods 402 are rotatably mounted inside the mounting shell 2. One end of each of the two rotating rods 402 is fixedly mounted with a mounting gear 403. The outer surfaces of the two mounting gears 403 mesh with one side of the mounting rack 401. Opening and closing plates 40 are fixedly mounted on the outside of each of the two rotating rods 402. 4. Both sides of the inner wall of the fire damper body 1 are fixedly installed with sealing strips 405. One side of the opening and closing plate 404 and one side of the sealing strip 405 are provided with abutting inclined surfaces. The fire damper body 1 can cut off the ventilation or exhaust pipe in case of fire or other emergency. The temperature sensor 3 senses whether the temperature of the fire damper body 1 exceeds the preset temperature value. The mounting rack 401 drives the two mounting gears 403 to rotate synchronously. The mounting gears 403 drive the rotating rod 402 to rotate. The rotating rod 402 drives the opening and closing plate 404 to fold ninety degrees, so that the opening and closing plate 404 fits with the sealing strip 405, thereby opening and closing the fire damper body 1.

[0031] like Figure 3 and Figure 4 As shown, a push-pull mechanism 5 is provided inside the mounting shell 2. The push-pull mechanism 5 includes a fixed plate 501 fixed to the inner wall of the mounting shell 2. An electric telescopic rod 502 is fixedly installed at the bottom end of the fixed plate 501. A movable slider 503 is fixedly installed at one end of the piston rod of the electric telescopic rod 502. The two ends of the movable slider 503 are slidably connected to the fixed plate 501 and the mounting rack 401, respectively. An extension plate 504 is fixedly installed on one side of the movable slider 503. A rotating wheel 505 is rotatably installed at the top of the extension plate 504. The electric telescopic rod 502 drives the movable slider 503 to move. The movable slider 503 moves stably through the fixed plate 501. The connecting groove between the movable slider 503 and the mounting rack 401 is relatively long. It will drive the mounting rack 401 to move after moving a certain distance. The movable slider 503 drives the extension plate 504 to move. The extension plate 504 drives the inclined block 602 to rise and fall through the inclined plane through the rotating wheel 505.

[0032] like Figure 5As shown, a locking mechanism 6 is provided inside the mounting shell 2. The locking mechanism 6 includes a spring rod 601 that is slidably installed inside the mounting shell 2. A ramp block 602 is fixedly installed at the bottom end of the spring rod 601. A columnar spring 603 is fixedly installed between the top end of the ramp block 602 and the inner wall of the mounting shell 2. A spring shell 604 is fixedly installed on one side of the ramp block 602. A telescopic spring 605 is fixedly installed on the inner wall of the spring shell 604. A spring insert plate 606 is fixedly installed at the other end of the telescopic spring 605. The ramp block 602 is stably raised and lowered by the spring rod 601. The columnar spring 603 drives the ramp block 602 to extend downward through the spring rod 601. The telescopic spring 605 drives the spring insert plate 606 to extend outward from the spring shell 604. After one end of the mounting rack 401 is moved out, it will limit one side of the mounting rack 401.

[0033] In use, this utility model cuts off ventilation or exhaust pipes in emergencies such as fires via the fire damper body 1. A temperature sensor 3 detects whether the temperature of the fire damper body 1 exceeds a preset value. If it does, the electric telescopic rod 502 is activated, which drives the movable slider 503 to move. The movable slider 503 moves stably via the fixed plate 501. The connecting groove between the movable slider 503 and the mounting rack 401 is relatively long, so the mounting rack 401 is driven to move after moving a certain distance. First, the movable slider 503 drives the extension plate 504 to move. The extension plate 504 drives the inclined block 602 to rise and fall via the rotating wheel 505. The inclined block 602 is raised and lowered via the spring rod 601. The device rises steadily, and the mounting rack 401 is no longer fixed. Then, the mounting rack 401 moves, driving the two mounting gears 403 to rotate synchronously. The mounting gears 403 drive the rotating rod 402 to rotate, and the rotating rod 402 drives the opening and closing plate 404 to fold ninety degrees, so that the opening and closing plate 404 fits with the sealing strip 405, thereby opening and closing the fire damper body 1. Similarly, when the rotating wheel 505 moves to the right, the cylindrical spring 603 rebounds, driving the inclined block 602 to extend downward through the spring rod 601. The telescopic spring 605 drives the spring insert plate 606 to extend outward of the spring shell 604. After one end of the mounting rack 401 moves out, it will limit one side of the mounting rack 401.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A locking device in a nuclear power plant fire damper, comprising a fire damper body (1), characterized in that: The fire damper body (1) has a mounting shell (2) fixedly installed inside. A temperature sensor (3) is fixedly installed at the bottom of the mounting shell (2). The fire damper body (1) has an opening and closing mechanism (4) inside. The mounting shell (2) has a push-pull mechanism (5) inside. The mounting shell (2) has a locking mechanism (6) inside.

2. The locking device in a nuclear power plant fire damper according to claim 1, characterized in that: The opening and closing mechanism (4) includes a mounting rack (401) that is slidably mounted on the inner bottom wall of the mounting shell (2). Two rotating rods (402) are rotatably mounted inside the mounting shell (2). One end of each of the two rotating rods (402) is fixedly mounted with a mounting gear (403). The outer surfaces of the two mounting gears (403) mesh with one side of the mounting rack (401).

3. The locking device in a nuclear power plant fire damper according to claim 2, characterized in that: Both rotating rods (402) are fixedly installed with opening and closing plates (404) on the outside. Both sides of the inner wall of the fire valve body (1) are fixedly installed with sealing strips (405). One side of the opening and closing plate (404) and one side of the sealing strip (405) are provided with abutting inclined surfaces.

4. The locking device in a nuclear power plant fire damper according to claim 2, characterized in that: The push-pull mechanism (5) includes a fixed plate (501) fixed to the inner wall of the mounting shell (2). An electric telescopic rod (502) is fixedly installed at the bottom end of the fixed plate (501). A movable slider (503) is fixedly installed at one end of the piston rod of the electric telescopic rod (502). The two ends of the movable slider (503) are slidably connected to the fixed plate (501) and the mounting rack (401) respectively.

5. The locking device in a nuclear power plant fire damper according to claim 4, characterized in that: An extension plate (504) is fixedly installed on one side of the movable slider (503), and a rotating wheel (505) is rotatably installed on the top of the extension plate (504).

6. The locking device in a nuclear power plant fire damper according to claim 1, characterized in that: The locking mechanism (6) includes a spring rod (601) that is slidably installed inside the mounting shell (2). A ramp block (602) is fixedly installed at the bottom end of the spring rod (601), and a columnar spring (603) is fixedly installed between the top end of the ramp block (602) and the inner wall of the mounting shell (2).

7. The locking device in a nuclear power plant fire damper according to claim 6, characterized in that: A spring shell (604) is fixedly installed on one side of the inclined block (602), a telescopic spring (605) is fixedly installed on the inner wall of the spring shell (604), and a spring insert plate (606) is fixedly installed on the other end of the telescopic spring (605).

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