Fireproof valve for oil smoke pipeline

Abstract

The fireproof valve comprises a valve body, an actuator, a hot melting device, a fire behavior detection device and a control system, a plurality of blade sets are arranged in the valve body, the actuator is arranged on the valve body, the hot melting device is arranged in the valve body, a hot melting piece is arranged in the hot melting device, and after the hot melting piece is melted at a high temperature, the fire behavior detection device is arranged in the valve body. The hot melting device triggers the actuator to start, and the actuator controls the blade group to close so as to close the oil smoke pipeline; the fire detection device comprises a detection rod, a plurality of first breakpoints are arranged in the detection rod, the first breakpoints are tin soldering connection points, the two ends of the detection rod are arranged on the valve body through insulators respectively, one end of the detection rod is connected with a power source through a first electric wire, and the other end of the detection rod is connected with the control system through a second electric wire. According to the fireproof valve for the oil smoke pipeline, the function of timely feeding back fire signals is achieved, the fire detection precision is high, and the detection sensitivity is high.

Description

Technical Field

[0001] This utility model relates to the field of fire damper technology, and in particular to a fire damper for oil fume ducts. Background Technology

[0002] Fire dampers are installed in kitchen exhaust ducts to prevent grease fires from spreading to downstream fume purification equipment. A typical fire damper consists of a valve body, actuator, blade assembly, and a heat fusion device. Under normal use, the blade assembly is open, allowing flow through the exhaust duct at both ends of the valve body. In the event of a fire, the high temperature melts the heat fusion strip on the heat fusion device, triggering the actuator to close the blade assembly, thus cutting off the connection between the exhaust duct and the fume purification equipment and preventing the fire from spreading.

[0003] However, existing fire dampers have a single function, consisting only of mechanical structures to prevent the spread of fire, and cannot provide timely feedback on the location of a fire via electrical signals. In pipelines that require fire signal feedback, a separate fire detection device must be installed, which is complex and difficult to maintain.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a fire damper for fume ducts, which aims to solve the technical problem that the prior art does not have fire detection function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fire damper for kitchen exhaust ducts includes a valve body, an actuator, a heat fusion device, a fire detection device, and a control system. The valve body contains several blade groups. The actuator is mounted on the valve body. The heat fusion device is located within the valve body and contains a heat fusion sheet. When the heat fusion sheet is melted at high temperature, the heat fusion device triggers the actuator to start, and the actuator controls the blade groups to close, thus sealing the kitchen exhaust duct. The fire detection device includes a detection rod with several first break points, which are solder joints. Both ends of the detection rod are mounted on the valve body via insulators. One end of the detection rod is connected to a power source via a first wire, and the other end is connected to the control system via a second wire.

[0008] Furthermore, there are two or more detection rods, and the multiple detection rods are symmetrically arranged, with the multiple detection rods connected in series by a third wire.

[0009] Furthermore, the detection rod includes a first connecting piece, a plurality of connecting rods and a second connecting piece connected in sequence. A first break point is used to connect two adjacent connecting rods. A second break point is provided between the first connecting piece and the adjacent connecting rod. A third break point is provided between the second connecting piece and the adjacent connecting rod.

[0010] Furthermore, the upper surface of the end of the connecting rod is provided with a protrusion that protrudes outward, and the lower surface is provided with a recess corresponding to the position of the protrusion.

[0011] Furthermore, the first connecting piece is connected to the corresponding insulator via a hook; the second connecting piece is connected to the corresponding insulator via a tension spring.

[0012] Furthermore, the valve body includes a first outer frame and a second outer frame, the second outer frame is disposed inside the first outer frame and is slidably connected to the first outer frame, the first outer frame and the second outer frame are fixedly connected by screws, the actuator is disposed outside the second outer frame, and several blade groups, a hot-melt device and a fire detection device are all disposed inside the second outer frame.

[0013] Furthermore, the outer wall of the second outer frame is provided with two symmetrically arranged handles, which are on the same side as the actuator.

[0014] Furthermore, the first outer frame is provided with flanges on the left and right sides, which are used for installation on the fume duct.

[0015] Beneficial effects:

[0016] The present invention provides a fire damper for oil fume ducts with the following advantages: (1) The detection rod is provided with a break point. One end of the detection rod is electrically connected to the power supply, and the other end is electrically connected to the control system. Whether the power supply signal is detected by the control system can be used to determine whether a fire has occurred, thus realizing the function of timely feedback of fire signals; (2) Multiple detection rods are set in series, and each detection rod is provided with multiple break points, so the fire detection accuracy is high; (3) The second outer frame can be pulled out to the outside of the first outer frame. Without removing the entire fire damper, it is easy to restore the blade group to the open state and restore the detection rod to the connected state, which is convenient for operation. Attached Figure Description

[0017] Figure 1 The front view of the fire damper for fume duct provided by this utility model;

[0018] Figure 2 A side view of the fire damper for fume ducts provided by this utility model after the blade assembly is opened;

[0019] Figure 3 The side view of the fire damper for fume duct provided by this utility model after the blade assembly is closed;

[0020] Figure 4 An exploded view of the fire damper for fume extraction ducts provided by this utility model;

[0021] Figure 5 The top view of the second external light in the fire damper for fume duct provided by this utility model;

[0022] Figure 6 The front view of the detection rod in the fire damper for fume duct provided by this utility model;

[0023] Figure 7 This is a partial sectional view of the connecting rod in the fire damper for oil fume ducts provided by this utility model.

[0024] Reference numerals: Valve body 1, First outer frame 11, Second outer frame 12, Screw 13, Flanged edge 14, Guide rail 15, Actuator 2, Hot melt device 3, Spring rod 31, First hot melt piece 32, First rod 33, Second hot melt piece 34, Second rod 35, Third hot melt piece 36, Third rod 37, Fire detection device 4, Detection rod 41, First connecting piece 411, Connecting rod 412, Protrusion 412a, Recess 412b, Second connecting piece 413, Hook 414, Tension spring 415, First break point 42, Insulator 43, First wire 44, Second wire 45, Third wire 46, Second break point 47, Third break point 48, Blade assembly 5, Handle 6. Detailed Implementation

[0025] This utility model provides a fire damper for kitchen exhaust ducts. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] In the description of this utility model, it should be understood that the terms "top," "bottom," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0027] Please see Figures 1 to 7As shown, this utility model provides a fire damper for oil fume ducts, including a valve body 1, an actuator 2, a heat fusion device 3, a fire detection device 4, and a control system. The valve body 1 is provided with several blade groups 5. The actuator 2 is located on the valve body 1. The heat fusion device 3 is located inside the valve body 1 and is provided with a heat fusion sheet. After the heat fusion sheet is melted at high temperature, the heat fusion device 3 triggers the actuator 2 to start. The actuator 2 controls the blade groups 5 to close to seal the oil fume duct. The fire detection device 4 includes a detection rod 41. The detection rod 41 is provided with several first break points 42. The first break points 42 are solder joints. The two ends of the detection rod 41 are respectively located on the valve body 1 through insulators 43. One end of the detection rod 41 is connected to a power source through a first wire 44, and the other end is connected to the control system through a second wire 45.

[0028] like Figure 2 As shown, during normal use, the multiple sets of blades 5 are in the open state, the fume duct is in a flowing state, and the flue gas flows to the downstream fume purification equipment to purify the flue gas. At the same time, the first wire 44, the detection rod 41, and the second wire 45 are in a connected state, and the control system detects a power signal, indicating that there is no fire at this time.

[0029] like Figure 3 As shown, when a fire occurs inside the fume extraction duct, the high temperature melts the thermosetting strip, triggering the actuator 2 to start. The actuator 2 then controls multiple blade groups 5 to close, sealing the fume extraction duct. Simultaneously, the high temperature melts the first break point 42, disconnecting the first wire 44, detection rod 41, and second wire 45. The control system detects no power signal, indicating a fire at the location where the fire damper is installed, requiring immediate fire suppression. Compared to existing technologies, this method provides timely fire signal feedback, enabling personnel to immediately address the fire and prevent its further spread.

[0030] In the above, the control system can be the controller of the fume purification system, which can uniformly monitor the fire dampers on each flue gas duct.

[0031] In the above description, the hot-melt device 3, the actuator 2, and the multiple blade groups 5 are all existing technologies, and their specific structures and working principles will not be elaborated further. For details, please refer to [link to relevant documentation]. Figure 4The heat fusion device 3 includes a spring rod 31, a first heat fusion piece 32, a first pull rod 33, a second heat fusion piece 34, a second pull rod 35, a third heat fusion piece 36, and a third pull rod 37 connected in sequence. One end of the spring rod 31 is connected to one side of the valve body 1, and the third pull rod 37 is connected to the other side of the valve body 1. When a fire occurs, the high temperature melts any heat fusion piece, and the tension on the spring rod 31 disappears, thus triggering the actuator 2 to start. The actuator 2 drives multiple blade groups 5 to close, and the fume duct is closed. When it is necessary to restore the fume duct to a free-flowing state, the fire damper is removed, a new heat fusion piece is replaced, so that the spring rod 31 is restored to a state of tension. At the same time, the actuator 2 is operated to open multiple blade groups 5. Finally, the fire damper is reinstalled in the fume duct.

[0032] In a preferred embodiment, see [reference] Figure 1 The detection rods 41 are two or more, and the multiple detection rods 41 are symmetrically arranged. The multiple detection rods 41 are connected in series by a third wire 46. Since the fume duct has a large cross-sectional area, it is impossible to determine which location has a higher temperature when a fire occurs. Therefore, setting multiple detection rods 41 can improve the detection accuracy. In this embodiment, the number of detection rods 41 is preferably four, and the four detection rods 41 are evenly distributed on the valve body 1. The ends of two adjacent detection rods 41 are connected in series by a third wire 46.

[0033] Further, see Figure 5 The detection rod 41 includes a first connecting piece 411, several connecting rods 412, and a second connecting piece 413 connected in sequence. A first break point 42 is used to connect two adjacent connecting rods 412. A second break point 47 is provided between the first connecting piece 411 and the adjacent connecting rod 412, and a third break point 48 is provided between the second connecting piece 413 and the adjacent connecting rod 412. By setting multiple break points, the accuracy of fire detection is further improved. When a fire occurs, if any break point is melted by high temperature, the detection rod 41 will be in an open state, and the control system will not detect a power signal, indicating that a fire has occurred and needs to be dealt with promptly.

[0034] Furthermore, see Figure 6 The upper surface of the end of the connecting rod 412 is provided with an outwardly protruding protrusion 412a, and its lower surface is provided with a recess 412b corresponding to the position of the protrusion 412a. When the connecting rod 412 is connected to the first connecting piece 411, and when the connecting rod 412 is connected to the second connecting piece 413, the recess 412b can increase the soldering range; when two adjacent connecting rods 412 are connected, the recess 412b cooperates with the protrusion 412a, which can also increase the soldering range to ensure the stability of the break point connection, so as to avoid the detection rod 41 from breaking due to unstable solder joints during normal use.

[0035] Optionally, the protrusion 412a and the recess 412b can be formed by stamping the end of the connecting rod 412.

[0036] Similarly, the second breakpoint 47 and the third breakpoint 48 are both solder joints. Solder has a low melting point and is easy to melt after being exposed to high temperatures, thus ensuring the sensitivity of the detection rod 41.

[0037] In the above embodiments, see Figure 5 , 6 The first connecting piece 411 is connected to the corresponding insulator 43 via a hook 414; the second connecting piece 413 is connected to the corresponding insulator 43 via a tension spring 415. By setting the tension spring 415, one end of the detection rod 41 is in a tensile state. During the process of melting at high temperature at any break point, the detection rod 41 is quickly broken by the tensile force, thereby improving the detection sensitivity of the fire detection device 4.

[0038] In a preferred embodiment, see [reference] Figure 1 , 4 The valve body 1 includes a first outer frame 11 and a second outer frame 12. The second outer frame 12 is located inside the first outer frame 11 and is slidably connected to the first outer frame 11. The first outer frame 11 and the second outer frame 12 are fixedly connected by screws 13. The actuator 2 is located on the outside of the second outer frame 12. Several blade groups 5, a heat fusion device 3, and a fire detection device 4 are all located inside the second outer frame 12. Specifically, the inner top surface and inner bottom surface of the first outer frame 11 are respectively fixed with guide rails 15. The top surface and bottom surface of the second outer frame 12 are slidably connected to the guide rails 15, so that the second outer frame 12 can be pulled out of the first outer frame 11. This allows the second outer frame 12 to be pulled out without removing the fire damper, so as to restore the blade group 5 to the open state and the detection rod 41 to the connected state. In addition, to ensure the stability of the connection between the first outer frame 11 and the second outer frame 12 in use, the side of the first outer frame 11 away from the actuator 2 is connected and fixed to the second outer frame 12 by two screws 13. When disassembling, the second outer frame 12 can be pulled out simply by unscrewing the two screws 13.

[0039] Preferably, the screw 13 is a hand-tightening screw, which is easy to operate.

[0040] Further, see Figure 4 The outer wall of the second outer frame 12 is provided with two symmetrically arranged handles 6, which are on the same side as the actuator 2. Holding the handles 6 makes it easy to pull out the second outer frame 12.

[0041] Furthermore, the first outer frame 11 is provided with flanges 14 on its left and right sides, which are used to install on the fume duct. Specifically, the flanges 14 are fixedly connected to the fume duct by fasteners, such as bolts and nuts. In actual use, the left side of the first outer frame 11 is fixedly connected to one side of the fume duct, and the right side is connected to a variable diameter duct. The downstream of the variable diameter duct is connected to the fume purification equipment. Preferably, the fire detection device 4 is located near the right side of the first outer frame 11. When a fire occurs, multiple blade groups 5 close to prevent the fire from spreading to the fume purification equipment and to protect the fire detection device 4.

[0042] In summary, this utility model uses multiple series-connected detection rods 41 installed inside the second outer frame 12. The detection rod 41 at the first end is connected to the power supply via a first wire 44, and the detection rod 41 at the last end is connected to the control system via a second wire 45. When a fire occurs, the detection rod 41 disconnects, and the control system cannot detect the power signal, indicating that a fire has occurred, thus achieving the function of timely feedback of fire signals. Furthermore, each detection rod 41 is equipped with multiple breakpoints to improve its detection accuracy. Simultaneously, the high temperature melts the heat-fused sheet, triggering the actuator 2 to start. The actuator 2 controls multiple blade groups 5 to close, sealing the fume duct to prevent the spread of fire. In addition, the first outer frame 11 is fixed inside the fume duct, and the second outer frame 12 is slidably connected to the first outer frame 11. The second outer frame 12 can be pulled out of the first outer frame 11 to easily restore the blade groups 5 to the open state and the detection rods 41 to the connected state, without needing to remove the entire fire damper from the flue, improving operational convenience.

[0043] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A fire damper for kitchen exhaust ducts, characterized in that, The device includes a valve body, an actuator, a heat fusion device, a fire detection device, and a control system. The valve body contains several blade groups, the actuator is mounted on the valve body, and the heat fusion device is located within the valve body. The heat fusion device contains heat fusion plates. When the heat fusion plates are melted at high temperature, the heat fusion device triggers the actuator to start, and the actuator controls the blade groups to close to seal the fume duct. The fire detection device includes a detection rod with several first break points, which are solder joints. Both ends of the detection rod are mounted on the valve body via insulators. One end of the detection rod is connected to a power source via a first wire, and the other end is connected to the control system via a second wire.

2. The fire damper for kitchen exhaust ducts according to claim 1, characterized in that, The detection rods are two or more, and the multiple detection rods are symmetrically arranged, and the multiple detection rods are connected in series by a third wire.

3. The fire damper for kitchen exhaust ducts according to claim 1, characterized in that, The detection rod includes a first connecting piece, several connecting rods and a second connecting piece connected in sequence. A first break point is used to connect two adjacent connecting rods. A second break point is provided between the first connecting piece and the adjacent connecting rod. A third break point is provided between the second connecting piece and the adjacent connecting rod.

4. The fire damper for kitchen exhaust ducts according to claim 3, characterized in that, The upper surface of the end of the connecting rod is provided with a protrusion that protrudes outward, and the lower surface is provided with a recess corresponding to the position of the protrusion.

5. The fire damper for kitchen exhaust ducts according to claim 3, characterized in that, The first connecting piece is connected to the corresponding insulator via a hook; the second connecting piece is connected to the corresponding insulator via a tension spring.

6. The fire damper for kitchen exhaust ducts according to claim 1, characterized in that, The valve body includes a first outer frame and a second outer frame. The second outer frame is located inside the first outer frame and is slidably connected to the first outer frame. The first outer frame and the second outer frame are fixedly connected by screws. The actuator is located on the outside of the second outer frame. Several blade groups, a hot-melt device, and a fire detection device are all located inside the second outer frame.

7. The fire damper for kitchen exhaust ducts according to claim 6, characterized in that, The outer wall of the second outer frame is provided with two symmetrically arranged handles, which are on the same side as the actuator.

8. The fire damper for kitchen exhaust ducts according to claim 6, characterized in that, The first outer frame has flanges on its left and right sides, which are used for installation on the fume duct.

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