Heat insulation type fireproof and smoke-proof valve with high circulation efficiency

Abstract

The invention discloses a high-circulation-efficiency heat insulation type fireproof and smoke-proof valve which comprises an outer frame and a locking assembly, a signal box is fixed to the outer frame through the locking assembly, blades are fixed in the outer frame through fasteners, and each blade comprises a blade frame, a blade fan, a transmission main shaft and an auxiliary shaft. The transmission main shaft and the auxiliary shaft are arranged on the two sides of the outer frame, the transmission main shaft is locked and fixed through a locking half-moon plate matched with a screw, the transmission main shaft penetrates through the action executing mechanism, and the action executing mechanism is arranged on the outer frame. The valve has the beneficial effects that the effective ventilation area is obviously increased when the blades are in a full-open state, the heat deformation resistance is improved, and the sealing effect of the valve cannot be influenced in a high-temperature environment; the assembly requirement is low, debugging is easy, after the connector is connected with the outer frame, later disassembly and error correction are not affected, disassembly and assembly are fast and convenient, the outer frame independently bears the interface installation function, and installation is fast.

Description

Technical Field

[0001] The invention relates to a fire and smoke damper, and in particular to a high-flow efficiency heat-insulating fire and smoke damper. Background Art

[0002] Fire and smoke dampers are key valves for fire and smoke isolation control in nuclear islands. In order to prevent the spread of fire and toxic high-temperature smoke through ventilation ducts, fire and smoke dampers can help exhaust smoke and isolate the room where the fire occurs from the surrounding rooms.

[0003] When a fire occurs, the fire and smoke dampers are closed to block the fire and toxic high-temperature smoke from spreading through the ventilation ducts. Due to factors such as thermal radiation, negative pressure will form in the ducts on both sides of the fire, exacerbating the spread of the fire and toxic high-temperature smoke.

[0004] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the applicant found that the above technology has at least the following technical problems: 1. Normal insulated fire and smoke dampers use fireproof boards as frames and blade materials. The fire resistance performance is 180 minutes. Generally, the thickness of the fireproof boards needs to be increased to ensure thermal insulation. This leads to an increase in the thickness of the blades and the coating thickness of the frame. When the valve blades are fully open, the effective ventilation area is reduced, especially for smaller valves, where the effective ventilation area ratio is less than 50%.

[0005] 2. The blades of the fire and smoke damper deform quickly under the influence of long-term heat radiation and heat transfer. Under the influence of thermal deformation and negative pressure, displacement may occur, exacerbating the failure of the blocking effect of the fire and smoke damper.

[0006] 3. Affected by the changing environmental factors at the installation site, the existing fire and smoke dampers have complex structures, low assembly efficiency, and poor disassembly. When the assembled fire and smoke dampers fail to open properly and close with poor sealing, the design, inspection, and assembly personnel are unable to disassemble and re-verify them, and have to disassemble them completely to find the root cause of the problem. Affected by the structure, the later maintenance work at the installation site is also difficult to carry out. Summary of the invention

[0007] The embodiment of the present application provides a high-flow efficiency heat-insulating fire and smoke damper, and the effective ventilation area when the blade is fully open is significantly increased. The effective ventilation area of ​​valves with smaller sizes is higher than 50%, and the heat deformation resistance is increased. Slight deformation only occurs inside the plug plate and the slot, and will not affect the sealing effect of the valve in a high-temperature environment. The assembly requirements are low and the debugging is simple. After being connected to the outer frame, it will not affect the later disassembly and error correction. The disassembly and assembly are quick and convenient. The outer frame independently undertakes the interface installation function and the installation is fast.

[0008] The embodiment of the present application provides a high-flow efficiency heat-insulating fire and smoke damper, comprising: an outer frame and a locking assembly, wherein the outer frame is fixed with a signal box by the locking assembly, and blades are fixed in the outer frame by fasteners, and the blades include a blade frame, a blade fan, a transmission main shaft and an auxiliary shaft, and the transmission main shaft and the auxiliary shaft are arranged on both sides of the outer frame, and the transmission main shaft is locked and fixed by locking menisci and screws, and the transmission main shaft passes through an action actuator, and the action actuator is arranged on the outer frame, and the outer frame includes a flange frame, a frame heat-insulating fireproof board, a fusible bolt mounting column, a corner guard, and a shaft sleeve, and the outer ring of the flange frame is coated with a frame heat-insulating fireproof board.

[0009] The frame heat insulation fireproof board is fixed by self-drilling and self-tapping screws and wraps the entire flange frame. Fireproof sealant is applied between the frame heat insulation fireproof board and the flange frame. Fusible plugs and temperature sensing elements are arranged in the flange frame. The fusible plugs are fixed in the fusible plug mounting columns. The four corners of the flange frame are covered with corner guards, and the corner guards are connected and fixed to the flange frame by welding.

[0010] Axial holes are arranged on both sides of the flange frame, the transmission main shaft and the auxiliary shaft cooperate with the axis holes, shaft sleeves are arranged between the transmission main shaft and the auxiliary shaft and the axis holes, the transmission main shaft and the auxiliary shaft are inserted into the outer frame, the blade frame and the blade fan are socketed with each other and form a whole, the blade frame and the outer frame are connected by fasteners, and the transmission main shaft and the auxiliary shaft are connected to the blade fan by fixings.

[0011] The blade frame includes a blade frame plug plate, a blade frame slot, and a blade frame heat insulation and fireproof board. The blade frame slot is integrally processed by five axes after assembly and welding. The blade frame plug plate is formed by bending a thick plate. Fireproof sealant is applied between the blade frame heat insulation and fireproof board and the blade frame slot. The blade frame plug plate, the blade frame slot and the blade frame heat insulation and fireproof board are connected by fasteners.

[0012] The blade fan comprises: a blade fan insert plate, a blade fan slot, and a blade fan heat insulation and fireproof board. The blade fan insert plate is formed by bending a thick plate. The blade fan slot is formed by assembly welding and then processed by five-axis integral machining. The blade fan insert plate and the blade fan slot are assembled in the form of intermittent spot welding. The blade frame heat insulation and fireproof board and the assembled blade fan insert plate and the blade fan slot are provided with fireproof sealant by applying and connected by fasteners. The frame heat insulation fireproof board, the blade frame heat insulation fireproof board and the blade fan heat insulation fireproof board are made of calcium silicate, and the fusible plug is arranged on the non-fire surface and is located on the same horizontal line as the lock hole of the locking meniscus.

[0013] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The fire-exposed surface of the valve is evenly arranged with frame insulation fireproof boards, blade frame insulation fireproof boards and blade fan insulation fireproof boards as fire-resistant barriers. The temperature rise of the back-to-fire surface is slow, and the deformation of the blade frame slots, blade frame plug-ins, blade fan plug-ins, blade fan slots, transmission shafts and auxiliary shafts on the back-to-fire surface is small, which protects the transmission parts and sealing parts. The effective ventilation area when the blades are fully open has been significantly increased, and the effective ventilation area of ​​valves with smaller sizes is higher than 50%.

[0014] 2. The blade fan plug plate and the blade fan slot are made into two parts, which ensures a certain thickness of the blade fan plug plate and the processing accuracy of the blade fan slot. The blade fan plug plate and the blade fan slot are connected and inserted into a whole, which greatly increases the heat deformation resistance. Slight deformation only exists inside the plug plate and the slot, and will not affect the sealing effect of the valve in a high temperature environment.

[0015] 3. The blades are disassembled into blade frames and blade fans. The blades become an independent and complete enclosed body, which assumes the functions of fire barrier and sealing. The outer frame only assumes the functions of installation interface and outer fire barrier. The traditional blade shaft is split into a transmission main shaft and an auxiliary shaft, and the blades and the frame are connected in sections. The blades are a separate complete body with low assembly requirements and simple debugging. After being connected to the outer frame, it does not affect the later disassembly and error correction. The disassembly and assembly are quick and convenient. The outer frame independently assumes the interface installation function and is quickly installed. After the overall assembly is completed, the overall performance is good. Due to the blade fan plug-in board of a certain thickness, the influence of factors such as fatigue and deformation during operation is avoided. No replacement or maintenance work is required, which reduces the work of later on-site maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the specific structure of the present invention; Figure 2 It is a structural schematic diagram of the outer frame in the present invention; Figure 3 It is a schematic diagram of the structure of the blade in the present invention; Figure 4 is a cross-sectional view of the blade frame in the present invention; Figure 5 is a cross-sectional view of a blade fan in the present invention; Figure 6 This is a schematic diagram of the installation and operation of the high-flow efficiency heat-insulating fire and smoke damper of the present invention. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0018] A high-flow efficiency heat-insulated fire and smoke damper, comprising: an outer frame 1 and a locking assembly 3, wherein the outer frame 1 is fixed with a signal box 42 through the locking assembly 3, a blade 2 is fixed in the outer frame 1 through a fastener, the blade 2 comprises a blade frame 21, a blade fan 22, a transmission main shaft 23 and an auxiliary shaft 24, the transmission main shaft 23 and the auxiliary shaft 24 are arranged on both sides of the outer frame 1, the transmission main shaft 23 is locked and fixed by a locking meniscus 31 with screws, the transmission main shaft 23 passes through an action actuator 4, the action actuator 4 is arranged on the outer frame 1, the outer frame 1 comprises a flange frame 11, a frame heat-insulating fireproof board 12, a fusible bolt installation column 13, a corner guard 14, and a shaft sleeve 15, and the outer ring of the flange frame 11 is covered with a frame heat-insulating fireproof board 12; The frame heat insulation fireproof board 12 is fixed by self-drilling and self-tapping screws and wraps the entire flange frame 11. Fireproof sealant is applied between the frame heat insulation fireproof board 12 and the flange frame 11. Fusible plugs 32 and temperature sensing elements 44 are arranged in the flange frame 11. The fusible plugs 32 are fixed in the fusible plug mounting columns 13. The four corners of the flange frame 11 are covered with corner guards 14, and the corner guards 14 are connected and fixed to the flange frame 11 by welding. The flange frame 11 is provided with shaft holes on both sides, the transmission main shaft 23 and the auxiliary shaft 24 cooperate with the shaft holes, a shaft sleeve 15 is provided between the transmission main shaft 23 and the auxiliary shaft 24 and the shaft holes, the transmission main shaft 23 and the auxiliary shaft 24 are inserted into the outer frame 1, the blade frame 21 and the blade fan 22 are socketed with each other and form a whole, the blade frame 21 and the outer frame 1 are connected with each other through fasteners, and the transmission main shaft 23 and the auxiliary shaft 24 and the blade fan 22 are connected with each other through fixings; The blade frame 21 includes a blade frame insert plate 211, a blade frame slot 212, and a blade frame heat insulation and fireproof board 213. The blade frame slot 212 is integrally processed by five axes after being welded together. The blade frame insert plate 211 is formed by bending a thick plate. A fireproof sealant is applied between the blade frame heat insulation and fireproof board 213 and the blade frame slot 212. The blade frame insert plate 211, the blade frame slot 212, and the blade frame heat insulation and fireproof board 213 are connected by fasteners. The blade fan 22 comprises: a blade fan insert plate 221, a blade fan slot 222, and a blade fan heat insulation fireproof plate 223. The blade fan insert plate 221 is formed by bending a thick plate, and the blade fan slot 222 is formed by assembly welding and then processed by five-axis integral machining. The blade fan insert plate 221 and the blade fan slot 222 are assembled in the form of intermittent spot welding. The blade frame heat insulation fireproof plate 213 and the assembled blade fan insert plate 221 and the blade fan slot 222 are provided with fireproof sealant by applying and connected by fasteners. The frame heat insulation fireproof board 12, the blade frame heat insulation fireproof board 213 and the blade fan heat insulation fireproof board 223 are made of calcium silicate. The fusible plug 32 is arranged on the back fire surface and is located on the same horizontal line as the lock hole of the locking meniscus 31.

[0019] Calcium silicate fireproof board can ensure thermal insulation. During and after the fire water impact test of the heat-insulating fire and smoke damper after the fire resistance test, the calcium silicate fireproof board will not collapse quickly due to water absorption, thus ensuring its use in the event of an accidental fire in a nuclear power plant.

[0020] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: The fire-exposed surface of the valve is evenly arranged with frame insulation fireproof panels 12, blade frame insulation fireproof panels 213 and blade fan insulation fireproof panels 223 as fire-resistant barriers. The temperature rise on the back-to-fire surface is slow. The deformation of components such as the blade frame slot 212, blade frame plug plate 211, blade fan plug plate 221, blade fan slot 222, transmission shaft and auxiliary shaft 24 on the back-to-fire surface is small, which protects the transmission parts and sealing parts. The effective ventilation area when the blade 2 is fully open is significantly increased, and the effective ventilation area of ​​valves with smaller sizes is higher than 50%.

[0021] The blade fan plug plate 221 and the blade fan slot 222 are made into two parts, which are respectively installed on the blade frame 21 and the blade fan 22. They are formed by bending thick steel plates. The blade fan slot 222 is processed by CNC five-axis machining to ensure a certain thickness of the blade fan plug plate 221 and the processing accuracy of the blade fan slot 222. The blade fan plug plate 221 and the blade fan slot 222 are connected and inserted into a whole, which greatly increases the heat deformation resistance. Slight deformation only exists inside the plug plate and the slot, and will not affect the sealing effect of the valve in a high temperature environment.

[0022] The blade 2 is disassembled into the blade frame 21 and the blade fan 22. The blade 2 independently becomes a complete enclosed body, which assumes the functions of fire barrier and sealing. The outer frame 1 only assumes the functions of installation interface and outer fire barrier. The traditional blade 2 axis is split into a transmission main shaft 23 and an auxiliary shaft 24. The blade 2 and the frame are connected in sections. The blade 2 is a separate complete body with low assembly requirements and simple debugging. After being connected to the outer frame 1, it does not affect the later disassembly and error correction, and the disassembly and assembly are quick and convenient. The outer frame 1 independently assumes the interface installation function and is quickly installed. After the overall assembly is completed, the overall performance is good. Due to the blade fan plug plate 221 of a certain thickness, the influence of factors such as fatigue and deformation during operation is avoided. No replacement and maintenance work is required, which reduces the work of later on-site maintenance.

[0023] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0024] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A high flow efficiency heat insulation type fire and smoke damper, comprising: An outer frame and a locking assembly, characterized in that the outer frame is fixed with a signal box through a locking assembly, blades are fixed in the outer frame through fasteners, the blades include a blade frame, a blade fan, a transmission main shaft and an auxiliary shaft, the transmission main shaft and the auxiliary shaft are arranged on both sides of the outer frame, the transmission main shaft is fixed by locking the meniscus with screws, the transmission main shaft passes through the action actuator, the action actuator is arranged on the outer frame, the outer frame includes a flange frame, a frame heat insulation and fireproof board, a fusible bolt mounting column, a corner guard, and a bushing, and the outer ring of the flange frame is covered with a frame heat insulation and fireproof board.

2. A high flow efficiency heat insulation type fire and smoke damper as claimed in claim 1, characterized in that: The frame heat insulation fireproof board is fixed by self-drilling and self-tapping screws and wraps the entire flange frame. Fireproof sealant is applied between the frame heat insulation fireproof board and the flange frame. Fusible plugs and temperature sensing elements are arranged in the flange frame. The fusible plugs are fixed in the fusible plug mounting columns. The four corners of the flange frame are covered with corner guards, and the corner guards are connected and fixed to the flange frame by welding.

3. A high flow efficiency heat insulation type fire and smoke damper as claimed in claim 1, characterized in that: Axial holes are arranged on both sides of the flange frame, the transmission main shaft and the auxiliary shaft cooperate with the axis holes, shaft sleeves are arranged between the transmission main shaft and the auxiliary shaft and the axis holes, the transmission main shaft and the auxiliary shaft are inserted into the outer frame, the blade frame and the blade fan are socketed with each other and form a whole, the blade frame and the outer frame are connected by fasteners, and the transmission main shaft and the auxiliary shaft are connected to the blade fan by fixings.

4. A high flow efficiency heat insulation type fire and smoke damper as claimed in claim 1, characterized in that: The blade frame includes a blade frame plug plate, a blade frame slot, and a blade frame heat insulation and fireproof board. The blade frame slot is integrally processed by five axes after assembly and welding. The blade frame plug plate is formed by bending a thick plate. Fireproof sealant is applied between the blade frame heat insulation and fireproof board and the blade frame slot. The blade frame plug plate, the blade frame slot and the blade frame heat insulation and fireproof board are connected by fasteners.

5. A high flow efficiency heat insulation type fire and smoke damper as claimed in claim 1, characterized in that: The blade fan includes: a blade fan plug plate, a blade fan slot, and a blade fan heat insulation and fireproof board. The blade fan plug plate is formed by bending a thick plate. The blade fan slot is formed by assembly welding and then processed by five-axis integral machining. The blade fan plug plate and the blade fan slot are assembled in the form of intermittent spot welding. Fireproof sealant is applied between the blade frame heat insulation and fireproof board and the welded blade fan plug plate and blade fan slot and connected by fasteners.

6. A high flow efficiency heat insulation type fire and smoke damper as claimed in claim 1, characterized in that: The frame heat insulation fireproof board, the blade frame heat insulation fireproof board and the blade fan heat insulation fireproof board are made of calcium silicate, and the fusible plug is arranged on the back-fire surface and is located on the same horizontal line as the lock hole of the locking meniscus.

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