A fireproof equipment gate and a nuclear power plant

Abstract

The present invention discloses a fireproof equipment gate, which includes a door panel body. The door panel body includes a sealing plate, reinforcing ribs and a fireproof core board. A plurality of the reinforcing ribs are uniformly arranged on the fire-facing side surface of the sealing plate. A hollow area is provided inside the reinforcing ribs. The fireproof core board is laid on the area between adjacent reinforcing ribs and filled in the hollow areas of each reinforcing rib. The fireproof equipment gate of the present invention has a simple and reasonable structure, high strength and fireproof ability. The present invention also provides a nuclear power plant.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear power equipment, and particularly relates to a fireproof equipment gate and a nuclear power plant. Background Art

[0002] With the improvement of the third-generation nuclear power technology and the development of the fourth-generation nuclear power technology, the pressurized water reactor type of nuclear power plants is developing towards high power. The containment is the outermost building of the pressurized water reactor and serves as the last physical barrier to prevent the leakage of radioactive substances. The equipment gate is a part of the containment pressure boundary, an important part of the last safety barrier of the nuclear power plant, and also serves as the access passage for large equipment in the reactor building during the construction, installation, shutdown, and refueling of the nuclear power plant.

[0003] However, in current projects, the fast reactor type does not have a dedicated containment system and corresponding equipment gates. During the design of the containment for the fast reactor type, it is necessary to fully consider the pressure and temperature loads generated by the sodium fire caused by the sodium leakage in the primary loop due to the hypothetical core disassembly accident. It can be seen that the containment and the equipment gate need to have a certain fireproof function for this point. The traditional containment system of the pressurized water reactor type does not have a fireproof function. In previous projects, there was no dedicated containment system for this point, and no special fireproof equipment gate was set in the main equipment passage, which could not meet the fireproof requirements of the fast reactor type.

[0004] Moreover, the size of the hole for the equipment gate to move in the containment is generally fixed (usually the hole through the +35m floor slab, with a hole size of 6200mm x 360mm). In order to install a fireproof layer, the thickness of the equipment gate is bound to be increased, resulting in the inability to install the equipment gate. And if we want to keep the thickness of the entire equipment gate unchanged, we need to reduce the original thickness of the equipment gate, weakening the strength of the equipment gate itself. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fireproof equipment gate aiming at the above deficiencies in the prior art. The equipment gate has a simple and reasonable structure, high strength and fireproof ability, and also provides a nuclear power plant.

[0006] A fireproof equipment gate provided by the present invention includes a door panel body. The door panel body includes a sealing plate, reinforcing ribs, and a fireproof core board. A plurality of the reinforcing ribs are evenly arranged on the fire-facing side surface of the sealing plate. A hollow area is provided inside the reinforcing ribs. The fireproof core board is laid in the area between adjacent reinforcing ribs and filled in the hollow areas of each reinforcing rib.

[0007] Preferably, the door panel body further includes a support member, which is installed on the reinforcing rib. The support member is in the shape of a sheet and extends from the middle of the side of the reinforcing rib in a direction parallel to the sealing plate. The fireproof core board between adjacent reinforcing ribs is placed on the support member and supported by the support member, so as to form an air layer for restricting heat conduction between the fireproof core board and the sealing plate.

[0008] Preferably, the door panel body further includes a fireproof panel and a cover panel. The fireproof panel is laid on the area between adjacent reinforcing ribs and is located on the fire-facing side of the fireproof core board for restricting the movement of the fireproof core board; the cover panel is laid on the fire-facing side of the fireproof panel and each reinforcing rib and serves as the fire-facing side coating layer of the door panel body.

[0009] Preferably, the fireproof equipment gate further includes a door frame. The back-fire side of the sealing plate in the door panel body is pressed against the pressure-receiving surface of the door frame. A plurality of grooves are formed on the pressure-receiving surface of the door frame, and sealing strips are embedded in the grooves. The thickness of the sealing strips is greater than the depth of the grooves, and avoidance holes are provided in the sealing strips for the sealing strips to be compressed inward after being pressed.

[0010] Preferably, fireproof expansion fillers are further provided in the avoidance holes of the sealing strips, and openings communicating with the outside and the inside of the avoidance holes are further formed on the sealing strips. The fireproof expansion fillers are used to expand at a predetermined temperature and gush out from the openings to seal the door frame and the door panel body.

[0011] Preferably, the fireproof equipment gate further includes a locking device, which is arranged between the door panel body and the wall outside the door frame and is used to press the door panel body against the door frame movably.

[0012] Preferably, the locking device includes a locking bar, a transmission member and a driving member. The locking bar is arranged at the edge of the door panel body. Guide inclined surfaces that fit each other are provided at the edge of the door panel body and the end of the locking bar. The driving member is used to drive the transmission member to act, so as to drive the locking bar to move along the guide inclined surface to the fire-facing side of the door panel body and press it, thereby pressing the door panel body against the door frame.

[0013] The locking device includes a locking bar, a transmission member and a driving member. The locking bar is arranged at the edge of the door panel body. A retaining bar is provided at a position on the wall outside the door frame opposite to this edge. Guide inclined surfaces that fit each other are provided on the retaining bar and the end of the locking bar. The driving member and the transmission member are installed at the edge of the door panel body. The transmission member is connected between the driving end of the driving member and the locking bar. The driving member is used to drive the transmission member to act, so as to drive the locking bar to move along the guide inclined surface to the inside of the retaining bar and press the door panel body against the door frame through the supporting force provided by the retaining bar.

[0014] Preferably, the transmission member is a screw lift, and the locking bar is a screw rod adapted to the screw sleeve of the screw lift.

[0015] Preferably, a plurality of locking devices are provided corresponding to each side of the door frame. Each of the locking devices on the same side is installed on a bottom plate. An embedded part is provided on the wall of the outer side of the door frame, and the bottom plate is detachably connected to the embedded part.

[0016] The present invention also provides a nuclear power plant, which includes a fast neutron reactor, a containment shell arranged outside the fast neutron reactor, and the above-mentioned fireproof equipment gate. The fireproof equipment gate is arranged at the main equipment passage of the containment shell.

[0017] The present invention provides a fireproof equipment gate. The door panel body of the equipment gate includes a sealing plate, a reinforcing rib, and a fireproof core board. A plurality of reinforcing ribs are evenly arranged on the fire-facing side surface of the sealing plate. The reinforcing ribs not only ensure the overall strength of the door panel body, but also do not increase the thickness of the door panel body. At the same time, they do not completely cover the fire-facing side surface, but leave many gaps, so that the fireproof core board for fire prevention has an area to be laid. At the same time, a hollow area is also provided inside the reinforcing rib itself, and this area can also be used as the placement area for the fireproof core board. The fireproof core board between each reinforcing rib and the fireproof core board inside each reinforcing rib form a fireproof layer on the fire-facing side of the door panel body, ensuring the fireproof performance of the equipment gate. Through a reasonable layout structure, while ensuring the strength of the door panel body, the installability of the door panel body is also ensured, and the fireproof requirements of the containment shell are also met. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the door panel body of the fireproof equipment gate in Embodiment 1 of the present invention;

[0019] Figure 2 is a schematic cross-sectional structural diagram of the door panel body of the fireproof equipment gate in Embodiment 1 of the present invention;

[0020] Figure 3 is a schematic cross-sectional structural diagram of the door frame of the fireproof equipment gate in Embodiment 1 of the present invention;

[0021] Figure 4 is a schematic structural diagram of the upper side and left and right side locking devices of the fireproof equipment gate in Embodiment 1 of the present invention;

[0022] Figure 5 is a schematic structural diagram of the end of the lock bar of the fireproof equipment gate in Embodiment 1 of the present invention;

[0023] Figures 6a to 6c is a schematic diagram of the locking process of the locking device of the fireproof equipment gate in Embodiment 1 of the present invention;

[0024] Figure 7 is a schematic structural diagram of the lower side locking device of the fireproof equipment gate in Embodiment 1 of the present invention;

[0025] Figure 8 It is a schematic diagram of the distribution position of the locking device of the fireproof equipment gate in Embodiment 1 of the present invention.

[0026] In the figure: 1. Door panel body; 11. Sealing plate; 12. Reinforcing rib; 13. Fireproof core board; 14. Support member; 15. Air isolation layer; 16. Fireproof panel; 17. Cover panel; 2. Door frame; 21. Groove; 22. Sealing strip; 23. Fireproof expansion filler; 24. Stop bar; 3. Locking device; 31. Lock bar; 32. Transmission member; 321. Connecting seat; 322. Guide seat; 33. Driving member; 34. Bottom plate; 35. Embedded part. Detailed implementation manners

[0027] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connection", "setting", "installation", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] Embodiment 1

[0032] As Figure 1 and Figure 2As shown in the figure, the fireproof equipment gate of this embodiment includes a door panel body 1. The door panel body 1 includes a sealing plate 11, reinforcing ribs 12, and a fireproof core board 13. A plurality of reinforcing ribs 12 are evenly arranged on the fire-facing side surface of the sealing plate 11. A hollow area is provided inside the reinforcing ribs 12. The fireproof core board 13 is laid on the area between adjacent reinforcing ribs 12 and filled in the hollow areas of each reinforcing rib 12.

[0033] In this embodiment, the reinforcing ribs 12 not only ensure the overall strength of the door panel body 1, but also do not increase the thickness of the door panel body 1. At the same time, they do not completely cover the fire-facing side surface, but leave many gaps, allowing the fireproof core board 13 for fire prevention to have an area to be laid. At the same time, a hollow area is also provided inside the reinforcing ribs 12 themselves, and this area can also be used as the placement area for the fireproof core board 13. The fireproof core board 13 between each reinforcing rib 12 and the fireproof core board 13 inside each reinforcing rib 12 form a fireproof layer on the fire-facing side of the door panel body 1, ensuring the fireproof performance of the equipment gate. Through a reasonable layout structure, while ensuring the strength of the door panel body 1, the installability of the door panel body 1 is also ensured, and the fireproof requirements of the containment are also met.

[0034] In this embodiment, the sealing plate 11 is a whole plate-like structure to ensure the integrity of the door panel body 1. The outer dimensions of the sealing plate 11 are 7208 mm (height) x 5420 mm (width), made of SA-516Gr70 steel plate, and the thickness is 50 mm. The reinforcing ribs 12 can be selected as structural square steel with a specification of J150x100x8, with a vacant square hollow area in the middle. When arranging the reinforcing ribs 12, they are first arranged on the four side edges of the sealing plate 11 to strengthen the overall structural strength, and then they are evenly arranged in a horizontal and vertical cross pattern inside the four side edges of the sealing plate 11 to control the compressive deformation of the sealing plate 11.

[0035] The fireproof core board 13 is made of a material based on magnesium chloride and magnesium oxide, reinforced with alkali-resistant glass woven fabric, toughened with high-quality plant fibers to be lightweight, and supplemented with modifiers. It belongs to the existing A1-class non-combustible material. According to the sample, the heat insulation (140 °C) of the plain board of this product can reach 2 hours at 45 mm. During the fire resistance test, the highest temperature does not exceed 180 °C, and the average does not exceed 140 °C. It is fireproof, heat-insulating, and non-combustible, which has met the fireproof requirements of the containment fire gate, and is lightweight and high-strength, which can effectively reduce the weight of the door panel.

[0036] In this embodiment, the door panel body 1 further includes a support member 14. The support member 14 is installed on the reinforcing rib 12. The support member 14 is sheet-shaped and extends from the middle of the side surface of the reinforcing rib 12 in a direction parallel to the sealing plate 11. The fireproof core board 13 between adjacent reinforcing ribs 12 is placed on the support member 14 and is supported by the support member 14, so that an air layer 15 for restricting heat conduction is formed between the fireproof core board 13 and the sealing plate 11. This air layer 15 can effectively restrict heat conduction, reduce the direct fire-receiving area of the sealing plate 11, and play an effective role in flame retardancy and heat insulation.

[0037] In this embodiment, the support member 14 can be a keel with an L-shaped cross-section, which is convenient for material selection. One side of the keel serves as a connecting portion to connect the reinforcing rib 12, and the other side serves as a supporting portion to play a supporting role.

[0038] In this embodiment, the door panel body 1 further includes a fireproof panel 16 and a cover panel 17. The fireproof panel 16 is laid on the area between adjacent reinforcing ribs 12 and is located on the fire-facing side of the fireproof core board 13 to restrict the movement of the fireproof core board 13; the cover panel 17 is laid on the fire-facing side of the fireproof panel 16 and each reinforcing rib 12 and serves as the fire-facing side coating layer of the door panel body 1.

[0039] In this embodiment, the fireproof panel 16 also belongs to the existing A1-class non-combustible materials. It is a three-dimensional mechanical structure composed of a magnesium oxide cementitious material as the main body, a fiberglass cloth as the reinforcing material, and an organic fiber as the filler. It has the characteristics of heat insulation, non-combustibility, light weight, high strength, strong plasticity, and strong seismic resistance. It can be used as the coating material for the fireproof core board 13 to prevent it from shaking.

[0040] In this embodiment, the thickness of the cover panel 17 is 3 mm, the thickness of the fireproof core board 13 is 40 mm, the thickness of the fireproof panel 16 is 9 mm, the thickness of the formed air layer 15 is 51 mm, and the overall thickness of the door panel body 1 is 153 mm, which can meet the installation requirements.

[0041] In this embodiment, as Figure 3 shown, the fireproof equipment gate also includes a door frame 2. The back fire side of the sealing plate 11 in the door panel body 1 is pressed against the pressure-receiving surface of the door frame 2. A plurality of grooves 21 are formed on the pressure-receiving surface of the door frame 2, and a sealing strip 22 is embedded in the grooves 21. The plurality of sealing strips 22 can achieve a better sealing effect, and the thickness of the sealing strip 22 is greater than the depth of the grooves 21, that is, the front part of the sealing strip 22 slightly protrudes from the grooves 21 to ensure that the sealing strip 22 can keep in contact with the door panel body 1. An avoidance hole is provided in the sealing strip 22 for the sealing strip 22 to be compressed inward after being pressed, so that the influence of the unevenness between the door frame and the door panel can be overcome, and the sealing of the pressure-bearing boundary can be realized.

[0042] Since the parameters of the containment seal material of the HPR1000 nuclear power plant can cover the requirements of the CFR600 type (temperature, pressure, and irradiation), the performance of the seal material can be used without qualification. Therefore, in this embodiment, the sealing strip 22 is made of EPDM rubber material, and a compression amount of 4 mm can be achieved in cooperation with the avoidance hole.

[0043] In this embodiment, a fireproof expansion filler 23 is further provided in the avoidance hole of the sealing strip 22, and an opening communicating the outside with the inside of the avoidance hole is also provided on the sealing strip 22. The fireproof expansion filler 23 is used to expand at a predetermined temperature and gush out from the opening to seal the door frame 2 and the door panel body 1. When encountering a conventional fire or a sodium fire accident, when the working temperature of the fireproof expansion filler 23 is reached, the fireproof expansion filler 23 quickly preheats and expands, filling the entire groove between the door frame 2 and the door panel body 1 to form a new sealing surface, ensuring no fire spread and leakage under double protection.

[0044] In this embodiment, the fireproof equipment gate further includes a locking device 3. The locking device 3 is arranged between the door panel body 1 and the wall outside the door frame 2 and is used to tightly press the door panel body 1 against the door frame 2 movably. The locking device 3 includes a locking bar 31, a transmission member 32, and a driving member 33. Above and on the left and right sides of the door panel body 1, the locking device 3 is installed on the wall, as Figure 4 shown. The locking bar 31 is arranged at the edge of the door panel body 1. Guide inclined surfaces that fit each other are provided at the edge of the door panel body 1 and the end of the locking bar 31. The driving member 33 is used to drive the transmission member 32 to act, so as to drive the locking bar 31 to move along the guide inclined surface to the fire-facing side of the door panel body 1 and press it tightly, thereby pressing the door panel body 1 against the door frame 2.

[0045] In this embodiment, below the door panel body 1, the locking device 3 is installed on the door panel body 1, as Figure 7 shown. The locking bar 31 is arranged at the edge of the door panel body 1. A retaining bar 24 is provided at a position on the outer wall of the door frame 2 opposite to this edge. Guide inclined surfaces that fit each other are provided on the retaining bar 24 and the end of the locking bar 31. The driving member 33 and the transmission member 32 are installed at the edge of the door panel body 1. The transmission member 32 is connected between the driving end of the driving member 33 and the locking bar 31. The driving member 33 is used to drive the transmission member 32 to act, so as to drive the locking bar 31 to move along the guide inclined surface to the inside of the retaining bar 24, and press the door panel body 1 against the door frame 2 by the supporting force provided by the retaining bar 24.

[0046] That is, in this embodiment, the upper side and the left and right sides of the door panel body 1 are directly pressed by the locking bar 31 of the locking device 3. Since the lower side of the door opening is directly the ground, it is not convenient for equipment to enter and exit if another wall surface for installing the locking device 3 is provided. Therefore, the locking device 3 is installed on the door panel body 1, and the door panel body 1 is pressed tightly by the locking bar 31 against the retaining bar 24 for reverse support.

[0047] In this embodiment, the area of the sealing plate 11 is slightly larger than the layout area of the reinforcing ribs 12, so that the four-side edges of the sealing plate 11 extend beyond the layout area of the reinforcing ribs 12. The guiding inclined surface of the door panel body 1 is arranged on the edge of the fire-facing side surface of the sealing plate 11, and the locking bar 31 presses the door panel body 1 by pressing the sealing plate 11.

[0048] As Figure 5 and Figure 6a shown, the inclined surfaces at the end of the locking bar 31 and on the edge of the sealing plate 11 are both 15°. There is also a 20° inclined surface at the outermost edge of the end of the locking bar 31, and its inclination degree is slightly larger than that of the guiding inclined surface, which is convenient for the end of the locking bar 31 to be docked with the sealing plate 11.

[0049] As Figure 6b shown, when the door panel body 1 is in place in the door frame 2, the locking bar 31 moves straight forward. When the 20° inclined surface contacts the edge of the sealing plate 11, as the locking bar 31 is pushed forward, the initial pressing of the sealing plate 11 is realized; the locking bar 31 continues to be pushed forward until a pre-tightening force for establishing an initial seal is applied to the sealing plate 11 along the 15° guiding inclined surface, as Figure 6c shown. During the advancement of the locking bar 31, the pressing condition of the door panel can be checked at any time. If the pressing position is inaccurate, the locking bar 31 can be retracted to adjust the state of the door panel, and when it is aligned, continue to press.

[0050] In this embodiment, the transmission member 32 is a screw lift, which includes a connecting seat 321 and a guiding seat 322. The screw part is connected to the connecting seat 321, and the locking bar 31 is a screw rod adapted to the nut of the screw lift. When the nut part inside the screw lift is driven to rotate by the driving member 33, the locking bar 31 will be guided by the guiding seat 322 and then pushed forward by the screw action.

[0051] In this embodiment, after the preliminary analysis and calculation of the loads (pressure, earthquake, etc.), the number of locking points is reduced as much as possible, and it is determined to use 16 locking points. As Figure 8 shown, they are arranged according to the space around the door opening. There are five locking points on each of the left and right sides, three locking points on the upper part, and three locking points on the lower part are arranged on the door panel body 1, and a symmetric arrangement is adopted. As shown in the figure.

[0052] The three upper locking points cannot achieve coaxial drive of the connecting rod due to the need to hoist the wire rope on the door panel body 1. Therefore, each of the three locking points is provided with a motor as the driving member 33. One motor is used as the driving member 33 on each of the left and right sides to drive five transmission members 32 simultaneously, and one motor is used to drive three transmission members 32 simultaneously at the lower part. Coaxial drive can be achieved through the connecting rod. Only six motors are used for a total of sixteen locking points, saving the use of motors, reducing the probability of damage and errors, and also simplifying the control method and logic for subsequent locking operations and control system design.

[0053] In this embodiment, a plurality of locking devices 3 are correspondingly provided on each side of the door frame 2. Each of the locking devices 3 on the same side is installed on a bottom plate 34 through a connecting seat 321. An embedded part 35 is provided on the wall outside the door frame 2, and the bottom plate 34 is detachably connected to the embedded part 35. This integrated design occupies a small space. After the bottom plate 34 is detached from the embedded part 35, it can be taken out as a whole. For the sake of interchangeability, the same specification of screw lift is adopted in this embodiment, and alternative products can be quickly found under emergency conditions.

[0054] Embodiment 2

[0055] The nuclear power plant of this embodiment includes a fast neutron reactor and a containment vessel arranged outside the fast neutron reactor. It also includes the fireproof equipment gate in Embodiment 1. The fireproof equipment gate is arranged at the main equipment passage of the containment vessel, effectively improving the overall fireproof performance of the containment vessel and meeting the fireproof requirements of the fast reactor type.

[0056] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A fireproof equipment gate, characterized in that: It is arranged at the main equipment passage of the containment vessel and includes a door panel body (1). The door panel body (1) includes a sealing plate (11), reinforcing ribs (12), and a fireproof core board (13). A plurality of the reinforcing ribs (12) are uniformly arranged on the fire-facing side surface of the sealing plate (11). A hollow area is provided inside the reinforcing ribs (12). The fireproof core board (13) is laid on the area between adjacent reinforcing ribs (12) and filled in the hollow areas of each reinforcing rib (12). The door panel body (1) further includes a support member (14). The support member (14) is installed on the reinforcing rib (12). The support member (14) is in a sheet shape and extends from the middle of the side surface of the reinforcing rib (12) in a direction parallel to the sealing plate (11). The fireproof core board (13) between adjacent reinforcing ribs (12) is placed on the support member (14) and is lifted by the support member (14), so that an air layer (15) for restricting heat conduction is formed between the fireproof core board (13) and the sealing plate (11).

2. The fireproof equipment gate according to claim 1, characterized in that: The door panel body (1) further includes a fireproof panel (16) and a cover panel (17). The fireproof panel (16) is laid on the area between adjacent reinforcing ribs (12) and is located on the fire-facing side of the fireproof core board (13) for restricting the movement of the fireproof core board (13). The cover panel (17) is laid on the fire-facing side of the fireproof panel (16) and each reinforcing rib (12) and serves as the fire-facing side coating layer of the door panel body (1).

3. The fireproof equipment gate according to claim 1 or 2, characterized in that: It further includes a door frame (2). The back fire side of the sealing plate (11) in the door panel body (1) is pressed against the pressure-receiving surface of the door frame (2). A plurality of grooves (21) are formed on the pressure-receiving surface of the door frame (2). A sealing strip (22) is embedded in the grooves (21). The thickness of the sealing strip (22) is greater than the depth of the grooves (21). An avoidance hole is provided in the sealing strip (22) for enabling the sealing strip (22) to be compressed inward after being pressed.

4. The fireproof equipment gate according to claim 3, wherein: A fireproof expansion filler (23) is further provided in the avoidance hole of the sealing strip (22). An opening communicating the outside with the inside of the avoidance hole is further formed on the sealing strip (22). The fireproof expansion filler (23) is used for expanding at a predetermined temperature and gushing out from the opening to seal the door frame (2) and the door panel body (1).

5. The fireproof equipment gate according to claim 3, wherein: It further includes a locking device (3). The locking device (3) is arranged between the door panel body (1) and the wall outside the door frame (2) for movably pressing the door panel body (1) against the door frame (2).

6. The fireproof equipment gate according to claim 5, wherein: The locking device (3) includes a locking bar (31), a transmission member (32), and a driving member (33). The locking bar (31) is arranged at the edge of the door panel body (1). Guide inclined surfaces that fit each other are provided at the edge of the door panel body (1) and the end of the locking bar (31). The driving member (33) and the transmission member (32) are installed on the wall outside the door frame (2). The transmission member (32) is connected between the driving end of the driving member (33) and the locking bar (31). The driving member (33) is used to drive the transmission member (32) to act, so as to drive the locking bar (31) to move along the guiding inclined surface to the fire-facing side of the door panel body (1) and press it tightly, thereby pressing the door panel body (1) against the door frame (2).

7. The fireproof equipment gate according to claim 5, characterized in that: The locking device (3) includes a locking bar (31), a transmission member (32) and a driving member (33). The locking bar (31) is arranged at the edge of the door panel body (1). A retaining bar (24) is provided at a position on the outer wall of the door frame (2) opposite to this edge. Guiding inclined surfaces that fit each other are provided on the retaining bar (24) and at the end of the locking bar (31). The driving member (33) and the transmission member (32) are installed at the edge of the door panel body (1). The transmission member (32) is connected between the driving end of the driving member (33) and the locking bar (31). The driving member (33) is used to drive the transmission member (32) to act, so as to drive the locking bar (31) to move along the guiding inclined surface to the inside of the retaining bar (24), and press the door panel body (1) against the door frame (2) by the supporting force provided by the retaining bar (24).

8. The fireproof equipment gate according to claim 5, characterized in that: A plurality of locking devices (3) are correspondingly provided on each side of the door frame (2). Each locking device (3) on the same side is installed on a bottom plate (34). An embedded part (35) is provided on the outer wall of the door frame (2), and the bottom plate (34) is detachably connected to the embedded part (35).

9. A nuclear power plant, comprising a fast neutron reactor, characterized in that: It further includes a containment shell provided outside the fast neutron reactor, and the fireproof equipment gate according to any one of claims 1 to 8, and the fireproof equipment gate is provided at the main equipment passage of the containment shell.

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