Integrated passive double signal triggered pressure relief hydrophobic safety panel
By designing an integrated passive dual-signal triggered pressure relief and drainage safety panel, and adopting a purely mechanical structure and an adjustable limit hook plate structure, the problem of insufficient flexibility of traditional nuclear power plant pressure relief devices is solved, realizing multi-functional integration and precise adjustment, and meeting the extreme environmental requirements of nuclear power plants.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU APOLLO AIR CONDITIONER PURIFICATION EQUIP MFG
- Filing Date
- 2026-05-25
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional nuclear power plant depressurization and drainage facilities cannot simultaneously meet multiple stringent requirements such as precise release of high pressure differential, reliable drainage at low liquid levels, high-standard fireproofing and heat insulation, and resistance to impacts from projectiles. Furthermore, traditional equipment lacks flexibility and is difficult to fine-tune according to actual operating conditions.
An integrated passive dual-signal triggered pressure relief and drainage safety panel was designed. It adopts a purely mechanical structure to respond to liquid level and differential pressure signals. Combined with an adjustable limit hook plate structure, it realizes intelligent differentiation between two triggering modes. Through components such as float assembly and anti-tornado louvers, it integrates pressure relief, drainage, fire prevention and protection functions. It has fireproof, heat insulation and shock resistance capabilities, and has a compact structure.
It enables precise setting and adjustment of overpressure protection values, improves equipment applicability and protection accuracy, meets the requirements of extreme environments in nuclear power plants, and integrates multiple safety functions.
Smart Images
Figure CN122383099A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nuclear power plant safety equipment technology, and more specifically, to an integrated passive dual-signal triggered pressure relief and drainage safety panel. Background Technology
[0002] In nuclear power plant design, critical rooms such as the main steam isolation valve compartment must be equipped with safety depressurization and drainage facilities to cope with overpressure accidents caused by high-energy pipeline rupture (HELB) and potential flooding accidents. At the same time, as part of the fire protection boundary, this facility must possess fire integrity and withstand extreme environmental loads such as earthquakes and tornadoes, including impacts from projectiles. In traditional technical solutions, pressure relief and drainage functions are often achieved by different devices or by using simple louvers. It is difficult to simultaneously meet multiple stringent requirements such as accurate pressure differential relief, reliable drainage at low liquid levels, high-standard fireproofing and heat insulation, and resistance to impacts from projectiles. The set pressure of conventional pressure relief devices is usually fixed and difficult to fine-tune on-site according to actual working conditions.
[0003] Therefore, an integrated passive dual-signal triggered pressure relief and hydrophobic safety panel is proposed to address the above issues. Summary of the Invention
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an integrated passive dual-signal triggered pressure relief and hydrophobic safety panel to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated passive dual-signal triggered pressure relief and drainage safety panel, comprising a frame, a flip panel, anti-tornado louvers, a float assembly, a counterweight, a positioning hinge, and a sealing system. The frame is fixed to a wall opening, and the frame is fixedly connected to the wall surface of the wall opening by expansion bolts. The flip panel is installed and fixed to the inner wall of the frame by an eccentric positioning hinge. A fireproof expansion seal is fixedly connected to the bottom edge of the frame. A limit hook plate is movably installed on one side of the flip panel. An adjustment component is provided between the flip panel and the limit hook plate to adjust the force required for the limit hook plate to retract. When in use, the device responds to liquid level and differential pressure signals using a purely mechanical structure, ensuring high reliability. The core of the device is its unique "adjustable limit hook plate structure" design, which enables a single mechanism to intelligently distinguish and respond to two triggering modes. The outstanding advantage of this invention is that the overpressure protection value can be precisely set and adjusted according to actual working conditions, overcoming the limitations of traditional fixed pressure relief devices in terms of flexibility. This improves the applicability and protection accuracy of the equipment, and provides fire resistance, heat insulation, protection against projectiles, and earthquake resistance, meeting the requirements of the extreme environment of nuclear power plants. A single device integrates multiple safety functions such as pressure relief, drainage, fire prevention, and protection, and has a compact structure.
[0006] Preferably, the adjusting assembly includes a spring, adjusting bolts, a fixed seat, and connecting compression blocks. The fixed seat is fixedly connected to the flip panel by bolts. The limiting hook plate is limited and connected to the fixed seat. Adjusting bolts are symmetrically screwed onto the side wall of the fixed seat and located on both sides of the limiting hook plate. One end of each of the two adjusting bolts is rotatably connected to a connecting compression block. One end of the connecting compression block is fixedly connected to a spring. The end of the spring near the limiting hook plate is movably connected to the limiting hook plate. In use, by rotating the adjusting bolt, the connecting compression block connected to one end of the adjusting bolt is squeezed or moved away from the spring, thereby changing the pre-compression of the spring, thus linearly adjusting the force required for the limiting hook plate to retract, and thus accurately setting the pressure relief opening differential pressure threshold of the entire flip panel.
[0007] Preferably, the float assembly includes a float body and a lever arm. The lever arm is rotatably connected to the inner side wall at the bottom of the frame. One end of the lever arm is connected to a locking tongue, which is hooked to a limiting hook plate on the surface of the flip panel. Under normal conditions, the locking tongue at one end of the lever arm engages with the limiting hook plate. When the water level rises during flooding, the float body floats up, causing the lever arm to rotate and disengage from the limiting hook plate.
[0008] Preferably, the inner sidewall of the frame is fixedly installed with tornado-proof louvers, which are fixedly connected to the frame by expansion screws. The tornado-proof louvers are located at symmetrical positions on the flip panel. In the event of a tornado, the closed tornado-proof louvers can resist flying objects.
[0009] Preferably, in order to ensure the rigidity of the frame and its stability during installation and use, the frame is made of steel profiles, and the various parts of the frame are fixedly connected by welding.
[0010] Preferably, a counterweight is connected to the upper end of the flip panel surface. The counterweight is fixedly installed on the flip panel surface by bolts. When the water is flooded, the liquid level rises, the float body floats up and drives the lever arm to rotate, disengaging from the limit hook plate. The flip panel opens under the counterweight and water pressure.
[0011] Preferably, each of the positioning hinges has a fixing hole, and the fixing hole on the positioning hinge is fixedly connected between the frame and the flip panel by cooperating with the expansion screw.
[0012] Preferably, the interior of the flip panel is filled with a heat-insulating material filling layer, and the heat-insulating material filling layer is made of ceramic fiber cotton material. Ceramic fiber cotton material is not only heat-insulating and fire-resistant, but also lightweight, which makes it easy for the inner flip panel to be opened under external force.
[0013] The technical effects and advantages of this invention are as follows: Compared with existing technologies, this integrated passive dual-signal triggered pressure relief and drainage safety panel utilizes a purely mechanical structure to respond to liquid level and differential pressure signals, resulting in high reliability. Its core design is an original "adjustable limit hook plate structure," enabling a single mechanism to intelligently distinguish and respond to two triggering modes. A key advantage of this invention is that the overpressure protection value can be precisely set and adjusted according to actual operating conditions, overcoming the limitations of traditional fixed pressure relief devices in terms of flexibility. This improves the applicability and protection accuracy of the equipment, providing fire resistance, heat insulation, protection against projectiles, and earthquake resistance, meeting the extreme environmental requirements of nuclear power plants. A single device integrates multiple safety functions such as pressure relief, drainage, fire prevention, and protection, and boasts a compact structure. Attached Figure Description
[0014] Figure 1 This is a side cross-sectional view of an embodiment of the present invention (showing the outer side of the tornado-proof louvers and their normal closed state).
[0015] Figure 2 This is a side cross-sectional view of the flooding activation state according to an embodiment of the present invention.
[0016] Figure 3 This is a side cross-sectional view of the high-voltage (HELB) state in an embodiment of the present invention.
[0017] Figure 4 This is a partially enlarged detailed view of the adjustable spring limiting hook plate mechanism in an embodiment of the present invention.
[0018] The attached diagram is labeled as follows: 1. Frame; 2. Flip panel; 3. Tornado-proof louver; 4. Float assembly; 5. Counterweight; 6. Positioning hinge; 7. Sealing system; 8. Thermal insulation material filling layer; 9. Fireproof expansion seal; 10. Limiting hook plate; 11. Spring; 12. Float body; 13. Lever arm; 14. Adjusting bolt; 15. Fixing base; 16. Connecting compression block. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1
[0020] As attached Figures 1 to 4The integrated passive dual-signal triggered pressure relief and drainage safety panel shown includes a frame 1, a flip panel 2, anti-tornado louvers 3, a float assembly 4, a counterweight 5, a positioning hinge 6, and a sealing system 7. The frame 1 is fixed to the wall opening, and the frame 1 is fixedly connected to the wall surface of the wall opening by expansion bolts. In order to ensure the rigidity of the frame 1 and the stability during installation and use, the frame 1 is made of steel, and the various parts of the frame 1 are fixedly connected by welding. The flip panel 2 is installed and fixed on the inner wall of the frame 1 by an eccentric positioning hinge 6. Each positioning hinge 6 has a fixing hole, and the fixing hole on the positioning hinge 6 is fixedly connected to the positioning hinge 6 between the frame 1 and the flip panel 2 by cooperating with the expansion bolts. A fireproof expansion seal 9 is fixedly connected to the bottom edge inside the frame 1. A limit hook plate 10 is installed on one side of the flip panel 2 for limiting movement. An adjustment component is provided between the flip panel 2 and the limit hook plate 10 to adjust the force required for the limit hook plate 10 to retract.
[0021] In normal conditions, the latch at one end of the lever arm 13 engages with the limit hook plate 10. Then, during flooding, the liquid level rises, the float body 12 floats up, causing the lever arm 13 to rotate and disengage from the limit hook plate 10. At this time, after the flip panel 2 is unlocked by rotating, the flip panel 2 opens under the action of the counterweight 5 and water pressure. The flip panel 2 will rotate to a completely horizontal state and remain there, providing the maximum flow area for rapid drainage. Finally, under high pressure, the room is over-pressurized, and the pressure difference acts on the flip panel 2 to generate torque. When the torque exceeds the threshold set by the preload of the spring 11, the limit hook plate 10 will squeeze the spring 11 and retract inward, disengaging from the latch on the lever arm 13 connected to the top of the float body 12, which is still in a low position. At this time, the flip panel 2 opens rapidly under the action of the pressure difference. In case of fire, the heat insulation material filling layer 8 and the fireproof expansion seal 9 provide fireproof and heat insulation. In case of tornado, the tornado louvers 3 protect against flying objects. Example 2
[0022] Based on Example 1, the solution in Example 1 will be further described in detail below, with reference to the specific working method described in detail: Reference Figure 4In a preferred embodiment, the adjustment assembly includes a spring 11, an adjusting bolt 14, a fixed seat 15, and a connecting compression block 16. The fixed seat 15 is fixedly connected to the flip panel 2 by bolts. The limiting hook plate 10 is limited and connected to the fixed seat 15. The adjusting bolts 14 are symmetrically screwed onto the side wall of the fixed seat 15 and located on both sides of the limiting hook plate 10. One end of each adjusting bolt 14 is rotatably connected to a connecting compression block 16. One end of the connecting compression block 16 is fixedly connected to a spring 11. The end of the spring 11 near the limiting hook plate 10 is movably abutting against the limiting hook plate 10. In use, by rotating the adjusting bolt 14, the connecting compression block 16 rotatably connected to one end of the adjusting bolt 14 is squeezed or moved away from the spring 11, thereby changing the pre-compression of the spring 11, thereby linearly adjusting the force required for the limiting hook plate 10 to retract, and thus accurately setting the pressure relief opening differential pressure threshold of the entire flip panel 2.
[0023] Reference Figure 1 , Figure 2 In a preferred embodiment, the float assembly 4 includes a float body 12 and a lever arm 13. The lever arm 13 is rotatably connected to the inner side wall of the bottom end of the frame 1. One end of the lever arm 13 is connected to a locking tongue. The locking tongue at one end of the lever arm 13 is hooked and connected to the limiting hook plate 10 on the surface of the flip panel 2. Under normal conditions, the locking tongue at one end of the lever arm 13 is engaged with the limiting hook plate 10. When the water is flooded, the liquid level rises, the float body 12 floats up and drives the lever arm 13 to rotate, thus disengaging from the limiting hook plate 10.
[0024] Reference Figures 1 to 3 As a preferred embodiment, a tornado-proof louver 3 is fixedly installed on the inner side wall of the frame 1. The tornado-proof louver 3 is fixedly connected to the frame 1 by expansion screws, and the tornado-proof louver 3 is located at a symmetrical position of the flip panel 2. In the event of a tornado, the closed tornado-proof louver 3 can resist flying objects.
[0025] Reference Figure 2 In a preferred embodiment, a counterweight 5 is connected to the upper end of the flip panel 2 surface. The counterweight 5 is fixedly installed on the surface of the flip panel 2 by bolts. When the water is flooded, the liquid level rises, the float body 12 floats up and drives the lever arm 13 to rotate, disengaging from the limit hook plate 10. The flip panel 2 opens under the counterweight 5 and water pressure.
[0026] Reference Figure 1 As a preferred embodiment, the interior of the flip panel 2 is filled with a heat insulation material filling layer 8, and the heat insulation material filling layer 8 is made of ceramic fiber cotton material. Ceramic fiber cotton material is not only heat-insulating and fire-resistant, but also lightweight, which makes it easy for the inner flip panel 2 to be opened under the action of external force.
[0027] The working process of the present invention is as follows: First, when in use, by rotating the adjusting bolt 14, the connecting compression block 16 connected to one end of the adjusting bolt 14 is squeezed or moved away from the spring 11, thereby changing the pre-compression amount of the spring 11, thereby linearly adjusting the force required for the limit hook plate 10 to retract, and thus accurately setting the pressure relief opening differential pressure threshold of the entire flip panel 2. Under normal conditions, the locking tongue at one end of the lever arm 13 engages with the end of the limiting hook plate 10 extending from the fixed seat 15. Then, when the water is flooded, the liquid level rises, the float body 12 floats up and drives the lever arm 13 to rotate, disengaging from the limiting hook plate 10. At this time, after the flip panel 2 is unlocked by rotating it, the flip panel 2 opens under the action of the counterweight 5 and water pressure. The flip panel 2 will rotate to a completely horizontal state and remain there, providing the maximum flow area for rapid drainage. Then, under high pressure, the room becomes over-pressured, and the pressure difference acts on the flip panel 2 to generate torque. When the torque exceeds the threshold set by the preload of the spring 11, the limit hook plate 10 will squeeze the spring 11 to retract inward and disengage from the hook tongue on the lever arm 13 connected to the top of the float body 12, which is still in the low position. At this time, the flip panel 2 opens rapidly under the action of pressure difference. In case of fire, the heat insulation material filling layer 8 and the fireproof expansion seal 9 play a role in fireproofing and heat insulation. In case of tornado, the anti-tornado louvers 3 resist flying objects. The above is the working principle of the integrated passive dual-signal triggered pressure relief and drainage safety panel.
[0028] As a technical solution of this invention, the provided hardware configuration is merely for facilitating the implementation of specific braking control based on the hardware facilities. How to specifically implement braking control and the braking control method are not the technical problems to be solved or the objects of protection of this invention. Furthermore, the communication methods between the devices all adopt existing communication methods and are not the inventive point of this application.
[0029] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0030] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. An integrated passive dual-signal triggered pressure relief and hydrophobic safety panel, comprising a frame (1), a flip panel (2), anti-tornado louvers (3), a float assembly (4), a counterweight (5), a positioning hinge (6), and a sealing system (7), characterized in that: The frame (1) is fixed to the wall opening, and the frame (1) is fixedly connected to the wall surface of the wall opening by expansion screws. The flip panel (2) is installed and fixed on the inner wall of the frame (1) by an eccentric positioning hinge (6). A sealing system (7) is fixedly connected to the top of the inner wall of the frame (1). A fireproof expansion seal (9) is fixedly connected to the bottom edge of the frame (1). A limit hook plate (10) is installed on one side of the flip panel (2). An adjustment component is provided between the flip panel (2) and the limit hook plate (10) to adjust the force required for the limit hook plate (10) to retract.
2. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: The adjustment assembly includes a spring (11), an adjustment bolt (14), a fixed seat (15), and a connecting compression block (16). The fixed seat (15) is fixedly connected to the flip panel (2) by bolts. The limiting hook plate (10) is limited and connected to the fixed seat (15). The side wall of the fixed seat (15) and the two sides of the limiting hook plate (10) are symmetrically screwed with adjustment bolts (14). One end of each of the two adjustment bolts (14) is limited and rotatably connected to a connecting compression block (16). One end of the connecting compression block (16) is fixedly connected to a spring (11). The end of the spring (11) near the limiting hook plate (10) is movably abutted against the limiting hook plate (10).
3. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: The float assembly (4) includes a float body (12) and a lever arm (13). The lever arm (13) is rotatably connected to the inner side wall of the bottom end of the frame (1). One end of the lever arm (13) is connected to a locking tongue. The locking tongue at one end of the lever arm (13) is hooked to the limiting hook plate (10) on the surface of the flip panel (2).
4. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: The inner wall of the frame (1) is fixedly installed with a tornado louver (3). The tornado louver (3) is fixedly connected to the frame (1) by expansion screws, and the tornado louver (3) is located at a symmetrical position on the flip panel (2).
5. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: The frame (1) is made of steel profile, and the various parts of the frame (1) are fixedly connected by welding.
6. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: A counterweight (5) is connected to the upper end of the surface of the flip panel (2), and the counterweight (5) is fixedly installed on the surface of the flip panel (2) by bolts.
7. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: Each of the positioning hinges (6) has a fixing hole. The fixing holes on the positioning hinges (6) are used in conjunction with expansion screws to fix the positioning hinges (6) between the frame (1) and the flip panel (2).
8. The integrated passive dual-signal triggered pressure relief and hydrophobic safety panel according to claim 1, characterized in that: The flip panel (2) is filled with a heat insulation material filling layer (8), and the heat insulation material filling layer (8) is made of ceramic fiber cotton material.