Fireproof check valve
By using electromagnetic control components in the fire-proof check valve to push the normally closed counterbalance plate, the existing fire-proof check valve exhaust equipment is solved, and the safety hazards of existing fire-proof check valve exhaust equipment is high, noisy, air leakage and electric-controlled transmission shaft are achieved, and a lower cost, quieter and safer fire-proof check valve design is achieved.
Patent Information
- Application Number
- CN202411750391.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-03-07
AI Technical Summary
The existing fire-proof check valves have problems such as high cost of exhaust equipment, high operating noise, air leakage, and the electronically controlled transmission shaft is prone to oil accumulation, failure, and safety hazards.
A fire-proof check valve is designed, and the first electromagnetic control component uses a repulsive force to help push open the normally closed reverse stop plate by powering on, reducing the wind pressure requirement of the exhaust equipment, and the second electromagnetic control component helps the normally closed reverse stop plate return to the closed state when shut down, avoiding the use of the electrically controlled transmission shaft.
It has achieved the reduction of the air pressure demand of exhaust equipment, reduced noise and cost, avoided the safety hazards of the electronically controlled transmission shaft, and improved the sealing and reliability of the fire-proof check valve.
Smart Images
Figure CN119572777A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of building exhaust duct systems, and more specifically, to a fire check valve. Background Art
[0002] At present, the fire check valves used in the shared exhaust duct system of residential buildings are classified into two types according to the control principle: one is a non-electrically controlled fire check valve and the other is an electrically controlled fire check valve. Both types of fire check valves have problems in use.
[0003] 1. For non-electrically controlled fire-proof check valves, gravity parts, elastic parts or permanent magnetic parts are generally set on the normally closed check plate. These external forces are used to make the normally closed check plate more airtight when it returns to a closed position. However, when the single force or combined force of gravity, elastic force or permanent magnetic force is too large, the exhaust equipment needs to have a large pressure and wind force to push open the normally closed check plate, which will cause the exhaust equipment to be expensive and the operating noise to increase. If the single force or combined force of gravity, elastic force and permanent magnetic force that returns the normally closed check plate to a closed position is too small, it will be sucked open by the electric exhaust equipment installed at the outlet of the exhaust duct system, causing air leakage.
[0004] 2. As for the electric-controlled fire-proof check valve, one is arranged outside the air pipe, and has an electric-controlled transmission shaft connected to the normally closed check plate inside. The transmission shaft is telescopic or rotated to open and close under the action of the control mechanism. On the one hand, the shaft passes through the wall of the air pipe, which is easy to cause air leakage. On the other hand, after long-term use, oil and dirt accumulation causes the failure of the telescopic or rotational movement of the transmission shaft. In another electric-controlled fire-proof check valve, the electric control device is arranged on the right side of the valve cover plate, in the shared exhaust duct, which poses a safety hazard. In another electric-controlled fire-proof check valve, the electric control device is arranged in the air pipe, but the accumulated oil and high temperature in the air pipe can easily cause the electric control device to fail, which poses a safety hazard. Summary of the invention
[0005] The purpose of the embodiments of the present application is to provide a fire check valve, aiming to solve the technical problems that two fire check valves in the prior art have defects in use and urgently need to be improved.
[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:
[0007] Provided is a fire-proof check valve, comprising an air vent with an air inlet and an air outlet, a panel being arranged outside the air vent, a normally closed check plate being arranged inside the air vent or outside the air outlet, the bottom of the normally closed check plate being rotated and the top opening / closing the air outlet, a temperature control fire prevention device being arranged inside or outside the air vent, the fire-proof check valve further comprising a first bracket, one end of the first bracket being fixed to the windward surface of the normally closed check plate, the other end of the first bracket being a free end and extending in a direction away from the normally closed check plate, and the first bracket A first electromagnetic control component is provided between the free end and the lower end of the air vent pipe. When the fire check valve is working, the exhaust device outside the air inlet of the air vent pipe is turned on to supply air to the air inlet. The first electromagnetic control component is powered on to generate mutual thrust. The normally closed check plate opens the air outlet under the action of thrust and wind force. The first electromagnetic control component is powered off, and the normally closed check plate remains in an open state under the action of wind force. When the fire check valve stops working, the external exhaust device stops, and the normally closed check plate returns to close the air outlet and maintains a normally closed state.
[0008] Specifically, a second bracket is further provided on the first bracket or on the normally closed check plate, and a second electromagnetic control component is provided between the free end of the second bracket and the upper end of the air vent pipe. When the fire check valve stops working, the exhaust equipment outside the air inlet of the air vent pipe is shut down, and the second electromagnetic control component is energized and turned on to generate mutual thrust. Under the action of the thrust, the normally closed check plate rotates back to close the air outlet and maintain a normally closed state, and the second electromagnetic control component is powered off.
[0009] Specifically, the first electromagnetic control component includes a first electromagnet and a first permanent magnet, the first electromagnet is arranged at the lower end of the air tube, and the permanent magnet is arranged at the free end of the first bracket; the second electromagnetic control component includes a second electromagnet and a second permanent magnet, the second electromagnet is arranged at the upper end of the air tube, and the second permanent magnet is arranged at the free end of the second bracket.
[0010] Specifically, the first electromagnet and the second electromagnet each include an iron core and a coil sleeved on the iron core, the iron core and the coil are arranged outside the air tube, or the air tube is provided with a through hole, and the iron core extends into the through hole.
[0011] Specifically, the normally closed check plate is also provided with a gravity member and / or an elastic member which helps it return to the normally closed position.
[0012] Specifically, the first bracket is a fixed single-rod or multi-rod structure; or, the first bracket is a movable structure.
[0013] Specifically, a sealant is provided on the normally closed check plate.
[0014] Specifically, the normally closed check plate is a flat plate or a curved plate or an irregular plate.
[0015] Specifically, wind shields are provided on both sides and / or the bottom of the normally closed check piece.
[0016] Specifically, it also includes a wireless interconnection signal generating device arranged outside the air passage tube.
[0017] In the present application, the repulsive force generated when the first electromagnetic control component is energized helps push the normally closed check plate open, reducing the wind pressure requirement of the exhaust equipment. Lower-power wind pressure equipment can be selected, reducing noise and energy, and avoiding various safety hazards associated with setting an electric control transmission rod to control the normally closed check plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 A front view schematic diagram of a fire check valve provided in Example 1 of the present application;
[0020] Figure 2 for Figure 1 A cross-sectional view of
[0021] Figure 3 A schematic diagram of the back side of the fire check valve provided in the second embodiment of the present application;
[0022] Figure 4 for Figure 3 A cross-sectional view of
[0023] Figure 5 A front view schematic diagram of a fire check valve provided in Example 3 of the present application;
[0024] Figure 6 for Figure 5 A cross-sectional view of
[0025] Figure 7 A front view schematic diagram of a fire check valve provided in Example 4 of the present application;
[0026] Figure 8 for Figure 7 A cross-sectional view of
[0027] Fig. 9 A cross-sectional schematic diagram of a fire-proof check valve provided in Embodiment 5 of the present application;
[0028] Among them, the reference numerals in the figure are:
[0029] 10-Common exhaust duct;
[0030] 20-air vent; 21-air inlet; 22-air outlet; 23-panel; 24-normally closed check plate; 25-ventilation plate; 26-vent hole; 27-wind shield; 28-groove;
[0031] 30-first bracket; 31-second bracket;
[0032] 40-first electromagnetic control component; 41-first electromagnet; 411-first iron core; 412-first coil; 42-first permanent magnet;
[0033] 45 - second electromagnetic control component; 46 - second electromagnet; 461 - second iron core; 462 - second coil; 47 - second permanent magnet;
[0034] 50-gravity parts; 60-sealant; 70-temperature control and fire protection device; 80-elastic parts. DETAILED DESCRIPTION
[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0037] It should be understood that the directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.
[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.
[0039] Embodiment 1
[0040] Reference Figure 1 and Figure 2 The fire check valve provided in this embodiment is installed at the air inlet of each floor on the common exhaust duct 10, and is used to discharge the exhaust gas from the kitchen or bathroom on each floor into the common exhaust duct 10. The fire check valve includes an air vent 20, which has an air inlet 21 and an air outlet 22. The air vent 20 is provided with a panel 23 outside the air vent 20, which is used to prevent the gas in the common exhaust duct 10 from leaking out, and also plays the role of installing and fixing the air vent 20. In this embodiment, a normally closed check plate 24 is provided in the air vent 20. As an alternative, the normally closed check plate 24 can also be provided outside the air outlet 22, that is, in the common exhaust duct 10. The bottom of the normally closed check plate 24 rotates and the top opens / closes the air outlet 22, and a temperature control fire prevention device 70 is provided inside or outside the air vent 20. The fireproof check valve further includes a first bracket 30, one end of which is fixed to the windward side of the normally closed check piece 24, i.e., the side facing the air inlet 21, and the other end of the first bracket 30 is a free end and extends in a direction away from the normally closed check piece 24. A first electromagnetic control component 40 is provided between the free end of the first bracket 30 and the air passage 20. When the fire check valve works, the exhaust device outside the air inlet 21 of the air vent 20 (usually a kitchen range hood or a bathroom exhaust fan) is turned on to supply air to the air inlet 21, and the first electromagnetic control component 40 is powered on to generate mutual thrust. The normally closed check plate 24 opens the air outlet 22 under the action of thrust and wind, and the exhaust gas enters the shared exhaust duct 10 from the air outlet 22 and is discharged outward. At this time, the first electromagnetic control component 40 is powered off, and the normally closed check plate 24 can remain in an open state only under the action of wind; the fire check valve stops working, and the external exhaust device stops, that is, stops supplying air to the air inlet 21. At this time, there is no wind acting on the normally closed check plate 24, and the normally closed check plate 24 returns by gravity to close the air outlet 22 and remains in a normally closed state, isolating the shared exhaust duct 10 from the room, and preventing the exhaust gas from the shared exhaust duct 10 from flowing back into the room.
[0041] In this embodiment, the repulsive force generated when the first electromagnetic control component is energized helps to push open the normally closed check plate 24, thereby reducing the wind pressure requirement of the exhaust equipment. A lower-power wind pressure device can be selected to reduce the exhaust noise and the cost of the exhaust equipment. In addition, there is no need for an electric control device transmission shaft to control the normally closed check plate, thereby avoiding the safety hazards of setting up an electric control device transmission shaft.
[0042] Specifically, in this embodiment, a ventilation plate 25 is provided near the air outlet 22 in the air vent pipe 20, and a vent hole 26 connected to the air outlet 22 is provided on the ventilation plate 25. The bottom end of the normally closed check piece 24 is hinged on the ventilation plate 25, and the normally closed check piece 24 closes the vent hole 26 in the normally closed state. By hingedly connecting the normally closed check piece 24 to the ventilation plate 25, the normally closed check piece 24 extends into the common exhaust passage 10 when it is opened only when exhausting, and does not extend into the common exhaust passage 10 when exhausting, so as to prevent garbage from falling into the common exhaust passage 10 and damaging the valve or clogging the fire check valve, and to prevent the check valve from being damaged; the flow cross section of the common exhaust passage 10 will not be occupied, and the flow cross section of the exhaust passage will be relatively increased, which is more conducive to smooth exhaust.
[0043] Furthermore, in this embodiment, the first electromagnetic control assembly 40 includes a first electromagnet 41 and a first permanent magnet 42. The first electromagnet 41 is disposed on the air tube 20, and the first permanent magnet 42 is disposed on the free end of the first bracket 30.
[0044] Specifically, the first electromagnet 41 includes a first iron core 411 and a first coil 412 sleeved on the first iron core 411. A through hole (not numbered in the figure) is provided on the hollow tube 20, and the first iron core 411 extends into the hollow tube 20 through the through hole.
[0045] In this embodiment, the first iron core 411 is placed vertically, the first permanent magnet 42 is arranged at the bottom of the free end of the first bracket 30, and the magnetic directions of the first permanent magnet 42 and the first electromagnet 41 are both in the vertical direction. In this way, the repulsive effect between the first electromagnet 41 and the first permanent magnet 42 is better, and the normally closed check piece 24 can be pushed better. Of course, the first electromagnetic control component 40 can also push the normally closed check piece 24 in a non-vertical magnetic direction.
[0046] In this embodiment, wind shields 27 are provided on both sides and the bottom of the normally closed check piece 24. Of course, wind shields 27 may also be provided only on both sides or the bottom. The wind shields 27 on both sides and the wind shields 27 on the bottom rotate together with the normally closed check piece 24, and the wind shields 27 have folded edges that fit the ventilation plate 25.
[0047] In this embodiment, the first bracket 30 is a bent single-rod structure, and the first bracket 30 may also be a fixed double-rod structure. As an alternative, the first bracket 30 may also be a movable structure, for example, the first bracket 30 may be composed of a plurality of connecting rods.
[0048] In this embodiment, a gravity piece 50 is also provided on the normally closed check piece 24. When the fire check valve is not working, the normally closed check piece 24 returns to the position of closing the vent hole 26 by gravity. The gravity piece 50 is provided so that the normally closed check piece 24 can better return to the normally closed position by gravity. Of course, an elastic piece (not shown in the figure) can also be provided on the normally closed check piece 24 at the same time or separately to help it return to its position.
[0049] Furthermore, in this embodiment, a sealant 60 is provided on the normally closed check piece 24. The sealant 60 is provided at the joint between the normally closed check piece 24 and the vent hole 26, and the sealant 60 enhances the sealing effect of the joint to prevent the exhaust gas of the shared exhaust duct 10 from flowing back into the room.
[0050] In the present embodiment, the normally closed check piece 24 is an irregular concave-convex plate. Of course, the normally closed check piece 24 can also be a flat plate or a curved plate.
[0051] In this embodiment, the temperature control fire prevention device 70 includes a fuse (not shown in the figure) and a pressure rod (not shown in the figure). When a fire occurs, the fuse is melted by high temperature, and the pressure rod pops out to press the normally closed check plate 24 to cover the vent 26 of the ventilation plate 25 to prevent the fire from spreading. The specific structure of the temperature control fire prevention device 70 is prior art and will not be described in detail here.
[0052] In this embodiment, the fire check valve further includes a wireless interconnection signal generating device (not shown) disposed outside the air passage 20. By providing the wireless interconnection signal generating device, fire monitoring or hood linkage control or remote monitoring can be better implemented.
[0053] In this embodiment, the air tube 20 is integrally formed. Of course, the air tube 20 can be assembled in sections using different materials.
[0054] Embodiment 2
[0055] Reference Figure 3 and Figure 4 , the dotted line is a schematic diagram of the open state of the normally closed check piece 24. In this embodiment, the normally closed check piece 24 is not provided with side wind shields and a bottom wind shield 27, which can save costs.
[0056] In this embodiment, the first bracket 40 is a double bracket, and the structural stability of the double first bracket 43 is good. Moreover, in this embodiment, the normally closed check piece 24 is not provided with a gravity piece, but an elastic piece 80 is provided. The normally closed check piece 24 is a curved plate, and the normally closed check piece 24 relies on the elastic force of the elastic piece 80 to return to close the sealing vent hole 26.
[0057] The other structures in this embodiment are the same as those in the first embodiment and will not be described again here.
[0058] Embodiment 3
[0059] Reference Figure 5 and Figure 6 In this embodiment, the cross-section of the air vent 20 is circular, the normally closed check plate 24 is a flat plate, and is arranged at the outer end of the air outlet 22 of the air vent 20. The cross-section of the air vent 20 is circular and is suitable for installation in the circular reserved opening of the shared exhaust duct 10.
[0060] The other structures of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be described in detail.
[0061] Embodiment 4
[0062] Reference Figure 7 and Figure 8 In this embodiment, Figure 8 The middle dotted line represents the open state of the normally closed check piece 24. In this embodiment, a second bracket 31 is also provided on the first bracket 30. Of course, the second bracket 31 can also be provided on the normally closed check piece 24. A second electromagnetic control component 45 is provided between the free end of the second bracket 30 and the upper end of the air vent 20. When the fire check valve stops working, the exhaust device outside the air inlet 21 of the air vent 20 stops working, the second electromagnetic control component 45 is powered on to generate mutual thrust, and the normally closed check piece 24 rotates back to close the air vent 26 under the action of the thrust to maintain the normally closed state, and the second electromagnetic control component 45 is powered off.
[0063] As can be seen from the figure, the second electromagnetic control assembly 45 includes a second electromagnet 46 and a second permanent magnet 47 . The second electromagnet 46 is disposed at the upper end of the air tube 20 , and the second permanent magnet 47 is disposed at the free end of the second bracket 31 .
[0064] In this embodiment, the second electromagnet 46 includes a second iron core 461 and a second coil 462 sleeved on the second iron core 461. A through hole (not numbered in the figure) is provided on the hollow tube 20, and the second iron core 461 extends into the through hole. Of course, as in the fifth embodiment, a groove may be protruded inwardly from the outside of the hollow tube 20, and the second iron core 461 and the second coil 462 may be arranged in the groove outside the hollow tube 20.
[0065] The other structures of this embodiment are the same as those of the first embodiment and will not be described in detail.
[0066] Embodiment 5
[0067] Reference Fig. 9 In this embodiment, a groove 28 protrudes inward from the outside of the air pipe 20, and the first electromagnet 41 is arranged in the groove 28. This can reduce the volume occupied by the first electromagnet 41 outside the air pipe 20, which is beneficial to reduce the space between the ceiling and the floor, and relatively increase the indoor clearance height.
[0068] The other structures of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and are not described in detail again.
[0069] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.
Claims
1. A fireproof check valve, comprising a vent pipe with an air inlet and an air outlet, a panel is arranged outside the vent pipe, a normally closed check plate is arranged inside the vent pipe or outside the air outlet, the bottom of the normally closed check plate rotates and the top opens / closes the air outlet, a temperature control fireproof device is arranged inside or outside the vent pipe, and the characteristics are: The fire check valve also includes a first bracket, one end of which is fixed to the windward surface of the normally closed check plate, and the other end of the first bracket is a free end and extends in a direction away from the normally closed check plate. A first electromagnetic control component is provided between the free end of the first bracket and the lower end of the air vent. When the fire check valve is working, the exhaust device outside the air inlet of the air vent is turned on to supply air to the air inlet. The first electromagnetic control component is powered on to generate mutual thrust, and the normally closed check plate opens the air outlet under the action of thrust and wind force. The first electromagnetic control component is powered off, and the normally closed check plate remains in an open state under the action of wind force. When the fire check valve stops working, the external exhaust device stops, and the normally closed check plate returns to close the air outlet and remains in a normally closed state.
2. A fire-proof check valve according to claim 1, characterized in that: A second bracket is also provided on the first bracket or the normally closed check plate, and a second electromagnetic control component is provided between the free end of the second bracket and the upper end of the air vent pipe. When the fire check valve stops working, the exhaust equipment outside the air inlet of the air vent pipe is shut down, and the second electromagnetic control component is energized and turned on to generate mutual thrust. Under the action of the thrust, the normally closed check plate rotates back to close the air outlet and maintains a normally closed state, and the second electromagnetic control component is powered off.
3. A fire-proof check valve according to claim 2, characterized in that: The first electromagnetic control component includes a first electromagnet and a first permanent magnet, the first electromagnet is arranged at the lower end of the air tube, and the permanent magnet is arranged at the free end of the first bracket; the second electromagnetic control component includes a second electromagnet and a second permanent magnet, the second electromagnet is arranged at the upper end of the air tube, and the second permanent magnet is arranged at the free end of the second bracket.
4. A fire-proof check valve according to claim 3, characterized in that: The first electromagnet and the second electromagnet both include an iron core and a coil sleeved on the iron core. The iron core and the coil are arranged outside the air tube, or the air tube is provided with a through hole, and the iron core extends into the through hole.
5. A fire-proof check valve according to claim 1, characterized in that: The normally closed check plate is also provided with a gravity member and / or an elastic member which helps it return to the normally closed position.
6. A fire-proof check valve according to claim 1, characterized in that: The first bracket is a fixed single-rod or multi-rod structure; or, the first bracket is a movable structure.
7. The fire-proof check valve according to claim 1, characterized in that: The normally closed check piece is provided with sealant.
8. The fireproof check valve according to claim 1, characterized in that: The normally closed check plate is a flat plate or a curved plate or an irregular plate.
9. The fire-proof check valve according to claim 1, characterized in that: Wind shields are provided on both sides and / or the bottom of the normally closed check piece.
10. The fire-proof check valve according to claim 1, characterized in that: It also includes a wireless interconnection signal generating device arranged outside the air-through pipe.