A nuclear grade fire damper

Abstract

The present invention discloses a nuclear-grade fire damper, which relates to the technical field of fire dampers, and comprises a mounting frame, a driving element, a linkage element, a temperature sensing element and a plurality of blade assemblies arranged in sequence in the mounting frame, both ends of each blade assembly are hinged to the inner wall of the mounting frame, and adjacent blade assemblies are connected by linkage elements, and the blade assembly comprises a first side sub-blade, a second side sub-blade and a main shaft, and the first side sub-blade and the second side sub-blade are connected to form a cavity, and the middle part of the first side sub-blade and the middle part of the second side sub-blade are both provided with an outwardly convex arc surface, and the two arc surfaces face opposite directions, and the main shaft is fixedly installed in the cavity, and the temperature sensing element is used to guide the driving element to work, and to make the driving element drive one of the blade assemblies to rotate, and the linkage element can realize the synchronous rotation of each blade assembly to connect or disconnect the discharge side and the receiving side. The nuclear-grade fire damper can improve the overall strength and stress resistance, and ensure the overall sealing.

Description

Technical Field

[0001] The present invention relates to the technical field of fire dampers, and in particular to a nuclear-grade fire damper. Background Art

[0002] The blade assembly of a fire damper is generally composed of two panels connected to each other and a blade main shaft arranged between the two panels. The blade main shaft is arranged to improve the overall strength of the blade assembly. Generally, for the convenience of processing and installation, the two panels only clamp the blade main shaft without further connection with the blade main shaft (such as riveting, nailing, etc.). The connection between the two panels can be snap connection, clamping, nailing, riveting, etc.

[0003] Under the influence of high temperature and hot air pressure of fire, especially under the influence of detonation shock wave, the blade assembly has weak impact resistance and is prone to deformation, and the direction of deformation is free and uncontrolled. The above factors make it difficult to ensure the sealing of multiple blades of the fire damper in the event of a fire (especially a serious fire). Summary of the invention

[0004] The purpose of the present invention is to provide a nuclear-grade fire damper to solve the problems existing in the above-mentioned prior art, to improve the overall strength and stress resistance, and to ensure the overall sealing.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a nuclear-grade fire damper, comprising a mounting frame, a driving element, a linkage element, a temperature sensing element and a plurality of blade assemblies arranged in sequence in the mounting frame, both ends of each blade assembly are hinged to the inner wall of the mounting frame, adjacent blade assemblies are connected by the linkage element, the blade assembly comprises a first side sub-blade, a second side sub-blade and a main shaft, the first side sub-blade and the second side sub-blade are connected to form a cavity, the middle of the first side sub-blade and the middle of the second side sub-blade are both provided with an outwardly convex arc surface, and the two arc surfaces are oriented in opposite directions, the main shaft is fixedly installed in the cavity, the temperature sensing element is used to guide the driving element to work, and enable the driving element to drive one of the blade assemblies to rotate, and the linkage element can realize the synchronous rotation of each blade assembly to connect or disconnect the discharge side and the receiving side. Preferably, the ends of each main shaft are hinged to the mounting frame.

[0007] Preferably, a cover member is installed at the end of each blade assembly, the cover member can close the end of the cavity, and the cover member is hinged to the mounting frame.

[0008] Preferably, the sealing cover comprises a sealing section and an extension section, one end of the extension section is fixed to the middle part of the sealing section, the other end of the extension section is connected to the linkage element and can drive the linkage element to move, the sealing section is installed at the end of the cavity and can seal the end of the cavity, and there is an angle between the extension section and the sealing section.

[0009] Preferably, a plurality of rivet connecting plates are fixed on both sides of the encapsulation section, and the rivet connecting plate and the first side sub-blade, as well as the rivet connecting plate and the second side sub-blade are connected by rivets. A through hole for the main shaft to pass through is also provided in the middle of the encapsulation section, and the main shaft is matched with the through hole gap.

[0010] Preferably, the linkage element is a connecting rod, and both ends of the connecting rod are rotatably connected to the extending sections on the adjacent covering members.

[0011] Preferably, a fireproof expansion body is installed on each of the two opposite side frames of the mounting frame, and the arrangement direction of the two fireproof expansion bodies is perpendicular to the arrangement direction of the blade assembly. Under normal conditions, there is a gap between the fireproof expansion body and the end of the blade assembly. Under high temperature conditions, the fireproof expansion body can expand to seal the gap between the end of the blade assembly and the inner wall of the mounting frame.

[0012] Preferably, the mounting frame is a rectangular frame, and the mounting frame is provided with elongated holes on two opposite side frames, the length direction of the elongated holes is consistent with the arrangement direction of the blade assembly, a receiving groove is installed in the elongated holes, and the fireproof expansion body is installed in the receiving groove.

[0013] Preferably, both ends of the first side subblade in the width direction and both ends of the second side subblade in the width direction are detachably connected.

[0014] Preferably, the radius of curvature of the first side sub-blade is 90%-110% of the radius of curvature of the second side sub-blade, and the thermal expansion coefficient of the first side sub-blade is smaller than the thermal expansion coefficient of the second side sub-blade.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The nuclear-grade fire damper provided by the present invention has two ends of each blade assembly hinged to the inner wall of the mounting frame, so that the connection or disconnection between the discharge side and the receiving side can be achieved through the rotation of the blade assembly relative to the mounting frame, thereby ensuring its normal operation. The blade assembly includes a first side sub-blade, a second side sub-blade and a main shaft. The first side sub-blade and the second side sub-blade are connected to form a cavity. The main shaft is fixedly installed in the cavity to achieve synchronous rotation of the first side sub-blade, the main shaft and the second side sub-blade. The middle part of the first side sub-blade and the middle part of the second side sub-blade are both provided with an outwardly convex arc surface, and the arc surface is oriented in opposite directions. Therefore, when the pressure applied by the smoke / hot air comes from the outer direction of the arc surface, the arc surface can particularly improve the structural stability, and when the smoke / hot air is applied When the pressure comes from the inner side of the arc surface, the matching of multiple arc surfaces can guide the deformation, thereby enhancing the resistance characteristics, that is, the overall strength and stress resistance of the blade assembly are improved through the above-mentioned structural design, especially when drastic environmental changes such as explosion occur on the discharge side, the blade assembly can better maintain the sealing effect, the temperature sensing element is used to guide the operation of the driving element, and the driving element drives one of the blade assemblies to rotate, and the adjacent blade assemblies are connected by a linkage element, and then when one blade assembly rotates, the blade assembly drives the adjacent blade assembly to rotate synchronously through the linkage element, thereby realizing the synchronous rotation of each blade assembly, so that they are opened or closed synchronously, and the discharge side and the receiving side are connected or disconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the nuclear-grade fire damper provided by the present invention;

[0019] Figure 2 It is a structural schematic diagram of the installation frame in the present invention;

[0020] Figure 3 It is a structural schematic diagram of the blade assembly in the present invention;

[0021] Figure 4 yes Figure 3 A partial enlarged view of

[0022] Figure 5 is a schematic diagram of the structure of the first side sub-blade and the second side sub-blade in the present invention;

[0023] Figure 6 yes Figure 5 A partial enlarged view of

[0024] Figure 7 It is a schematic diagram of the connection between multiple blade components and a cover member in the present invention;

[0025] Figure 8 is a schematic structural diagram of the cover member before installation in the present invention;

[0026] Fig. 9 It is a schematic diagram of the connection between the cover member and the transmission element in the present invention;

[0027] Fig.10 It is a schematic diagram of the transmission element driving the cover member to rotate in the present invention;

[0028] In the figure: 100-installation frame, 110-connecting port, 120-side frame, 130-accommodating groove, 200-blade assembly, 210-first side sub-blade, 220-second side sub-blade, 230-main shaft, 240-cover member, 241-packaging section, 242-extension section, 243-perforation, 244-rivet connecting plate, 250-linking element, 300-driving element, 400-temperature sensing element, 500-fireproof expansion body. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a nuclear-grade fire damper to solve the technical problems of poor impact resistance and poor sealing performance of existing fire dampers.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1-Figure 10As shown, this embodiment provides a nuclear-grade fire damper, including a mounting frame 100, a driving element 300, a linkage element 250, a temperature sensing element 400 and a plurality of blade assemblies 200 arranged in sequence in the mounting frame 100, both ends of each blade assembly 200 are hinged to the inner wall of the mounting frame 100, so as to realize the connection or disconnection between the discharge side and the receiving side by the rotation of the blade assembly 200 relative to the mounting frame 100, thereby ensuring its normal operation, wherein, the smoke / hot air discharge process is defined, The discharge side corresponds to the indoor environment, and the receiving side corresponds to the outdoor environment. The blade assembly 200 includes a first side sub-blade 210, a second side sub-blade 220 and a main shaft 230. The main shaft 230 is fixedly installed in the cavity to realize the synchronous rotation of the first side sub-blade 210, the main shaft 230 and the second side sub-blade 220. The first side sub-blade 210 and the second side sub-blade 220 are connected to form a cavity. The middle part of the first side sub-blade 210 and the middle part of the second side sub-blade 220 are both provided with an outward convex arc surface, and The two curved surfaces are oriented in opposite directions, so when the pressure applied by the smoke / hot air comes from the outer side of the curved surface, the curved surface can particularly improve the structural stability. When the pressure applied by the smoke / hot air comes from the inner side of the curved surface, the matching of multiple curved surfaces can guide the deformation, thereby enhancing the resistance characteristics. That is, the overall strength and stress resistance of the blade assembly 200 are improved through the above-mentioned structural design, especially when drastic environmental changes such as explosion occur on the discharge side, the blade assembly 200 can better maintain the sealing effect. The temperature sensing element 400 is used to guide the operation of the driving element 300 and enable the driving element 300 to drive one of the blade assemblies 200 to rotate. The adjacent blade assemblies 200 are connected by the linkage element 250, and when one blade assembly 200 rotates, the blade assembly 200 drives the adjacent blade assembly 200 to rotate synchronously through the linkage element 250, thereby realizing the synchronous rotation of each blade assembly 200, so that they are opened or closed synchronously, and the discharge side and the receiving side are connected or disconnected.

[0033] Specifically, the end of each main shaft 230 is hinged to the mounting frame 100. As another option, a cover member 240 is installed at the end of each blade assembly 200. The cover member 240 can close the end of the cavity, and the cover member 240 is hinged to the mounting frame 100 to achieve the flipping of the blade assembly 200. When the multiple blade assemblies 200 are in the expanded state (that is, there is a gap between adjacent blade assemblies 200), the discharge side is connected to the receiving side, and the nuclear-grade fire damper realizes a normal ventilation process; when the multiple blade assemblies 200 are in the overlapped state (that is, there is no gap between adjacent blade assemblies 200), the nuclear-grade fire damper is closed to achieve a fire protection effect.

[0034] The cover member 240 includes a packaging section 241 and an extension section 242, one end of the extension section 242 is fixed to the middle of the packaging section 241, the other end of the extension section 242 is connected to the linkage element 250 and can drive the linkage element 250 to move, the packaging section 241 is installed at the end of the cavity and can block the end of the cavity, there is an angle between the extension section 242 and the packaging section 241, and then when the driving element 300 drives one of the main shafts 230 to rotate, the main shaft 230 drives the first side sub-blade 210 and the second side sub-blade 220 connected thereto to rotate, thereby realizing the rotation of the packaging section 241 connected to the blade assembly 200, the packaging section 241 drives the extension section 242 connected thereto to rotate, the extension section 242 drives the linkage element 250 to move, and the linkage element 250 drives the adjacent extension section 242 to rotate, and finally realizes the synchronous flipping of each blade assembly 200.

[0035] A number of rivet connecting pieces 244 are fixed on both sides of the packaging segment 241. The rivet connecting piece 244 and the first side sub-blade 210, as well as the rivet connecting piece 244 and the second side sub-blade 220 are connected by rivets. Before installation, the rivet connecting piece 244 and the packaging segment 241 are located in the same plane. When it is necessary to connect with the first side sub-blade 210 and the second side sub-blade 220, the rivet connecting piece 244 needs to be folded so that the rivet connecting piece 244 is perpendicular to the plane where the packaging segment 241 is located, so as to facilitate the connection with the first side sub-blade 210 and the second side sub-blade 220. A through hole 243 for the main shaft 230 to pass through is also provided in the middle of the packaging segment 241, and the main shaft 230 and the through hole 243 are clearance-matched.

[0036] The linkage element 250 is a connecting rod, and both ends of the connecting rod are rotatably connected to the extension section 242 on the adjacent cover member 240 to achieve rotation transmission.

[0037] The mounting frame 100 is provided with a fireproof expansion body 500 on each of the two opposite side frames 120, and the arrangement direction of the two fireproof expansion bodies 500 is perpendicular to the arrangement direction of the blade assembly 200, that is, the two fireproof expansion bodies 500 are respectively located on both sides of the length direction of the blade assembly 200, and the connection line between the two fireproof expansion bodies 500 is perpendicular to the main axis 230. Under normal conditions, there is a gap between the fireproof expansion body 500 and the end of the blade assembly 200 to ensure smooth rotation of the blade assembly 200. Under high temperature conditions, the fireproof expansion body 500 can be heated and expanded to seal the gap between the end of the blade assembly 200 and the inner wall of the mounting frame 100, thereby ensuring the sealing effect. Preferably, under non-high temperature conditions, the fireproof expansion body 500 does not protrude from the inner wall of the mounting frame 100.

[0038] The mounting frame 100 is a rectangular frame, and a connecting port 110 for connecting the discharge side and the receiving side is formed in the middle of the mounting frame 100. The mounting frame 100 is provided with a long hole on two opposite side frames 120. The length direction of the long hole is consistent with the arrangement direction of the blade assembly 200. A receiving groove 130 is installed in the long hole, and the receiving groove 130 and the long hole can be detachably connected. The fire-proof expansion body 500 is installed in the receiving groove 130, and the deformation of the fire-proof expansion body 500 is guided by the receiving groove 130.

[0039] The arc surface can regularly guide the outward deformation and resist the inward deformation, thereby improving the safety of use, while the existing planar design is prone to arch deformation, and the deformation direction is free and uncontrollable. The two ends of the first side sub-blade 210 in the width direction and the two ends of the second side sub-blade 220 in the width direction can be detachably connected, such as by buckling, clamping, nailing and riveting, etc., wherein, in this embodiment, the first side sub-blade 210 and the second side sub-blade 220 are connected by buckling, that is, the two long sides of the first side sub-blade 210 form buckling grooves, and the two long sides of the second side sub-blade 220 form buckling rails, so that the second side sub-blade 220 moves from one side of the first side sub-blade 210 to the other side, so as to slide the buckling rail into the buckling groove, thereby realizing the stable connection between the first side sub-blade 210 and the second side sub-blade 220.

[0040] The radius of curvature of the first side sub-blade 210 is 90%-110% of the radius of curvature of the second side sub-blade 220. The difference in the radius of curvature between the first side sub-blade 210 and the second side sub-blade 220 forms a prestress in the blade assembly 200 as a whole. The strength of the blade assembly 200 is improved and the above-mentioned prestress improves the ability of the blade assembly 200 to cope with negative forces (generated by expansion deformation or wind pressure). More preferably, the radius of curvature of the first side sub-blade 210 is 93% to 97% of the radius of curvature of the second side sub-blade 220. Too small a radius of curvature is not conducive to the processing of the main shaft 230, while too large a radius of curvature is not conducive to improving the structural strength characteristics of the blade assembly 200. The relatively small curvature radius of the first side sub-blade 210 makes the first side sub-blade 210 subject to compressive stress when the second side sub-blade 220 is combined with the first side sub-blade 210. Since the first side sub-blade 210 is on the wind pressure side, the compressive stress in the first side sub-blade 210 can improve its ability to resist wind pressure without deformation. At the same time, it is precisely because of the difference in the curvature radius of the two that the buckle connection strength of the two is greatly improved. Preferably, the curvature radius of the first side sub-blade 210 and the second side sub-blade 220 is 3-6 times the width dimension of the mounting frame 100.

[0041] The thermal expansion rate of the first side sub-blade 210 is smaller than that of the second side sub-blade 220. Under high temperature conditions, due to the difference in the degree of contraction between the first side sub-blade 210 and the second side sub-blade 220, in addition to the interaction force formed by the difference in curvature, a further force is added between the two, and the compressive stress of the first side sub-blade 210 is increased, and the above compressive stress will increase with the increase of temperature. Overall, the internal stress of the blade assembly 200 is enhanced, and its ability to cope with external forces is further improved. For example, the first side sub-blade 210 and the second side sub-blade 220 can be made of galvanized steel plates, and different thermal expansion rates of the two can be achieved by selecting different types of galvanized steel plates.

[0042] Regarding the design of the driving element 300, the main shaft 230 of one blade assembly 200 is fixed in the shaft hole provided in the driving element 300. When the driving element 300 is powered on, the internal motor thereof can rotate clockwise or counterclockwise to drive the blade assembly 200 to rotate. Since the connecting rod is connected to the blade assembly 200, when the blade assembly 200 connected to the driving element 300 rotates, the adjacent blade assembly 200 also rotates together with the connecting rod through the force transmission.

[0043] The driving force of the driving element 300 can be spring driven or motor driven, etc. The temperature sensing element 400 can be mechanical or electronic. When the temperature sensing element 400 is mechanical, the driving element 300 can be spring driven: the main component of the mechanical temperature sensor is the fuse, which is made of two copper sheets welded by fusible materials. Under normal conditions, the mechanical temperature sensor and the driving element 300 are connected and fixed by a spring, and the spring is in an expanded stress state at this time. When the fusible material of the fuse melts, the two copper sheets of the fuse separate and detach. At this time, the spring of the driving element 300 is detached from the connection of the fuse, and forms a retracted state due to its own spring force. This retraction process drives the driving element 300; when the temperature sensing element 400 is electronic, the driving element 300 can be motor driven, and the operation of the temperature sensing element 400 and the operation of the driving element 300 can be realized through a PLC control board.

[0044] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A nuclear grade fire damper, Features: The invention comprises a mounting frame, a driving element, a linkage element, a temperature sensing element and a plurality of blade assemblies arranged in sequence in the mounting frame, both ends of each blade assembly are hinged to the inner wall of the mounting frame, adjacent blade assemblies are connected by the linkage element, the blade assembly comprises a first side sub-blade, a second side sub-blade and a main shaft, the first side sub-blade and the second side sub-blade are connected to form a cavity, the middle part of the first side sub-blade and the middle part of the second side sub-blade are both provided with an outwardly convex arc surface, and the two arc surfaces are oriented in opposite directions, the main shaft is fixedly installed in the cavity, the temperature sensing element is used to guide the driving element to work, and enable the driving element to drive one of the blade assemblies to rotate, and the linkage element can realize the synchronous rotation of each blade assembly to connect or disconnect the discharge side and the receiving side; The installation frame is provided with a fireproof expansion body on each of the two opposite side frames, and the arrangement direction of the two fireproof expansion bodies is perpendicular to the arrangement direction of the blade assembly. Under normal conditions, there is a gap between the fireproof expansion body and the end of the blade assembly. Under high temperature conditions, the fireproof expansion body can expand to seal the gap between the end of the blade assembly and the inner wall of the installation frame. The radius of curvature of the first side sub-blade is 90%-110% of the radius of curvature of the second side sub-blade, and the thermal expansion rate of the first side sub-blade is smaller than the thermal expansion rate of the second side sub-blade.

2. The nuclear grade fire damper according to claim 1, Features: The ends of the main shafts are hinged to the mounting frame.

3. The nuclear grade fire damper according to claim 1, Features: A cover member is installed at the end of each blade assembly. The cover member can close the end of the cavity, and the cover member is hinged on the installation frame.

4. The nuclear grade fire damper according to claim 3, Features: The sealing cover comprises a sealing section and an extension section, one end of the extension section is fixed to the middle of the sealing section, the other end of the extension section is connected to the linkage element and can drive the linkage element to move, the sealing section is installed at the end of the cavity and can seal the end of the cavity, and there is an angle between the extension section and the sealing section.

5. The nuclear grade fire damper according to claim 4, Features: A plurality of rivet connecting plates are fixed on both sides of the packaging section, and the rivet connecting plate and the first side sub-blade, as well as the rivet connecting plate and the second side sub-blade are connected by rivets. A through hole for the main shaft to pass through is also opened in the middle of the packaging section, and the main shaft is gap-matched with the through hole.

6. The nuclear grade fire damper according to claim 4, Features: The linkage element is a connecting rod, and both ends of the connecting rod are rotatably connected to the extension sections on the adjacent cover members.

7. The nuclear grade fire damper according to claim 1, Features: The installation frame is a rectangular frame, and the installation frame is provided with long holes on two opposite side frames, the length direction of the long holes is consistent with the arrangement direction of the blade assembly, a receiving groove is installed in the long holes, and the fireproof expansion body is installed in the receiving groove.

8. The nuclear grade fire damper according to claim 1, Features: Both ends of the first-side subblade in the width direction and both ends of the second-side subblade in the width direction are detachably connected.

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