Fireproof check valve
By combining electromagnetic control components with wind power in fire check valves, the high cost, high noise and safety hazards of existing fire check valves are solved, and low wind pressure requirements, low noise and high airtightness are achieved.
Patent Information
- Application Number
- CN202422953089.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing fire check valves have problems such as high exhaust equipment cost, high noise, air leakage and safety hazards during use. In particular, electric-controlled fire check valves are prone to failure after long-term use and pose safety hazards.
The first electromagnetic control component and the second electromagnetic control component are used to push the normally closed check plate to open and close at the lower end and upper end of the air vent respectively. Combined with wind force and gravity or elastic parts, the wind pressure requirement of the exhaust equipment is reduced, avoiding air leakage and safety hazards of the electric control transmission shaft.
It reduces the wind pressure requirement of the exhaust equipment, reduces noise, saves energy, avoids the safety hazard of the electric control transmission shaft, and improves the airtightness and safety.
Smart Images
Figure CN223447745U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of building exhaust duct system, and more particularly to a fireproof check valve. BACKGROUND
[0002] At present, the fireproof check valves applied in the residential common exhaust duct system are mainly classified according to the control principle, and there are two kinds: one is a non-electric control fireproof check valve, and the other is an electric control fireproof check valve. Both kinds of fireproof check valves have problems in use.
[0003] I. For the non-electric control fireproof check valve, a gravity piece, a spring piece or a permanent magnetic piece is generally arranged on the normally closed check piece, and the normally closed check piece is closed better when it is returned to the closed position by using the external force. However, when the single force or the combined force of the gravity, the spring or the permanent magnet is too large, the exhaust equipment needs to have a larger pressure and wind power to push away the normally closed check piece, which will cause the cost of the exhaust equipment to be large and the operation noise to be increased. If the single force or the combined force of the gravity, the spring or the permanent magnet of the normally closed check piece returned to the closed position is too small, the normally closed check piece will be sucked open by the electric exhaust equipment arranged at the outlet of the exhaust duct system and the problem of gas leakage will occur.
[0004] II. For the electric control fireproof check valve, one kind is arranged outside the air passage pipe, and the electric control transmission shaft rod connected with the normally closed check piece is arranged inside the air passage pipe. The transmission shaft rod is extended or rotated under the action of the control mechanism to open and close. On the one hand, the shaft rod passing through the air passage pipe wall is easy to cause gas leakage, and on the other hand, the oil dirt is accumulated for a long time to cause the failure of the extension or rotation movement of the transmission shaft rod. In another kind of electric control fireproof check valve, the electric control device is arranged on the right side of the valve cover plate and is located in the common exhaust duct, which has a safety hazard. In still another kind of electric control fireproof check valve, the electric control device is arranged in the air passage pipe, but the accumulated oil and high temperature in the air passage pipe are easy to cause the failure of the electric control device, which has a safety hazard problem. CONTENT OF THE INVENTION
[0005] The purpose of the embodiment of the application is to provide a fireproof check valve, which aims to solve the technical problems that the two kinds of fireproof check valves in the prior art have defects in use and need to be improved.
[0006] To achieve the above purpose, the technical scheme adopted by the embodiment of the application is:
[0007] The application provides a fireproof check valve, which comprises a through pipe with an air inlet and an air outlet, a panel arranged outside the through pipe, a normally closed check valve arranged inside the through pipe or outside the air outlet, a bottom of the normally closed check valve rotates to open / close the air outlet, a temperature control fireproof device arranged inside or outside the through pipe, and a first support fixed to a windward surface of the normally closed check valve, with a free end of the first support extending away from the normally closed check valve, and a first electromagnetic control assembly arranged between the free end of the first support and a lower end of the through pipe. When the fireproof check valve works, an air suction device outside the air inlet of the through pipe is started to send air to the air inlet, the first electromagnetic control assembly is powered on to generate mutual thrust, the normally closed check valve is opened under the thrust and wind force, and the first electromagnetic control assembly is powered off to keep the normally closed check valve open under the wind force. When the fireproof check valve stops working, the air suction device outside the air inlet of the through pipe is stopped, and the normally closed check valve is closed to keep the normally closed state.
[0008] Specifically, a second support is arranged on the first support or the normally closed check valve, a second electromagnetic control assembly is arranged between a free end of the second support and an upper end of the through pipe, the through pipe air inlet outside the air suction device is stopped when the fireproof check valve stops working, the second electromagnetic control assembly is powered on to generate mutual thrust, the normally closed check valve is rotated to close the air outlet under the thrust to keep the normally closed state, and the second electromagnetic control assembly is powered off.
[0009] Specifically, the first electromagnetic control assembly comprises a first electromagnet and a first permanent magnet, the first electromagnet is arranged at the lower end of the through pipe, and the permanent magnet is arranged at the free end of the first support; the second electromagnetic control assembly comprises a second electromagnet and a second permanent magnet, the second electromagnet is arranged at the upper end of the through pipe, and the second permanent magnet is arranged at the free end of the second support.
[0010] Specifically, the first electromagnet and the second electromagnet each comprise an iron core and a coil sleeved on the iron core, the iron core and the coil are arranged outside the through pipe, or a through hole is arranged on the through pipe, and the iron core extends into the through hole.
[0011] Specifically, the normally closed check valve is further provided with a gravity piece and / or an elastic piece which help the normally closed check valve return to the normally closed position.
[0012] Specifically, the first support is a fixed single-rod or multi-rod structure, or the first support is a movable structure.
[0013] Specifically, the normally closed check valve is provided with sealing glue.
[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 plate.
[0016] Specifically, it also includes a wireless interconnection signal generating device arranged outside the air tube.
[0017] In this application, the repulsive force generated when the first electromagnetic control component is energized is used to help 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 that arise from 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 following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. 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 any creative work.
[0019] Figure 1 This is a front view of the fire check valve provided in Example 1 of the present application;
[0020] Figure 2 for Figure 1 sectional view of
[0021] Figure 3 This is a schematic diagram of the back of the fire check valve provided in Example 2 of the present application;
[0022] Figure 4 for Figure 3 sectional view of
[0023] Figure 5 This is a front view of the fire check valve provided in Example 3 of the present application;
[0024] Figure 6 for Figure 5 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 sectional view of
[0027] Figure 9 A cross-sectional schematic diagram of a fire check valve provided in Example 5 of the present application;
[0028] Among them, the reference numerals in the figures are:
[0029] 10-common exhaust passage;
[0030] 20-emptying pipe; 21-air inlet; 22-air outlet; 23-panel; 24-constant closed check valve; 25-ventilation panel; 26-vent hole; 27-windshield; 28-groove;
[0031] 30-first support; 31-second support;
[0032] 40-first electromagnetic control assembly; 41-first electromagnet; 411-first core; 412-first coil; 42-first permanent magnet;
[0033] 45-second electromagnetic control assembly; 46-second electromagnet; 461-second core; 462-second coil; 47-second permanent magnet;
[0034] 50-gravitational member; 60-sealing glue; 70-temperature control fireproof device; 80-elastic member. DETAILED DESCRIPTION
[0035] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.
[0036] It should be noted that when an element is referred to as being "fixed to" or "set 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 terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0038] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, and the meaning of "several" is one or more, unless otherwise explicitly specified.
[0039] Embodiment One
[0040] With reference to Figure 1 and Figure 2 The fireproof check valve is installed at the air inlet of each floor of the common exhaust duct 10, and is used to discharge the exhaust gas of the kitchen or bathroom of each floor into the common exhaust duct 10. The fireproof check valve comprises a through-air pipe 20, which has an air inlet 21 and an air outlet 22, and a panel 23 arranged outside the through-air pipe 20, which is used to prevent the gas in the common exhaust duct 10 from leaking outside, and also serves as a fixing part of the through-air pipe 20. In this embodiment, a normally closed check valve 24 is arranged in the through-air pipe 20. Alternatively, the normally closed check valve 24 can be arranged outside the air outlet 22, i.e. in the common exhaust duct 10. The bottom of the normally closed check valve 24 rotates, and the top opens / closes the air outlet 22. A temperature control fireproof device 70 is arranged inside or outside the through-air pipe 20. The fireproof check valve further comprises a first bracket 30, one end of which is fixed to the windward side of the normally closed check valve 24, i.e. the side facing the air inlet 21, and the other end of which is a free end and extends away from the normally closed check valve 24. A first electromagnetic control assembly 40 is arranged between the free end of the first bracket 30 and the through-air pipe 20. When the fireproof check valve is working, the air suction equipment (generally an oil smoke exhauster of a kitchen or an exhaust fan of a bathroom) outside the air inlet 21 of the through-air pipe 20 is started to send air to the air inlet 21, the first electromagnetic control assembly 40 is powered on to generate a mutual repulsive force, the normally closed check valve 24 is opened under the action of the repulsive force and the wind force, the exhaust gas enters the common exhaust duct 10 through the air outlet 22 and is discharged outside, at this time the first electromagnetic control assembly 40 is powered off, and the normally closed check valve 24 can be kept in the opened state only under the action of the wind force. When the fireproof check valve stops working, the external air suction equipment is stopped, i.e. the air sending to the air inlet 21 is stopped, at this time there is no wind force acting on the normally closed check valve 24, the normally closed check valve 24 returns to the closed state under the action of gravity, and the common exhaust duct 10 is isolated from the indoor environment, so as to avoid the exhaust gas in the common exhaust duct 10 from flowing back into the indoor environment.
[0041] In this embodiment, the repulsive force generated by the power-on of the first electromagnetic control assembly helps to push open the normally closed check valve 24, reduces the demand for the wind pressure of the air suction equipment, and can select a wind pressure equipment with smaller power, so as to reduce the air suction noise and the cost of the air suction equipment. In addition, the electric control equipment transmission shaft is not needed to control the check valve, and the safety hazard caused by the setting of the electric control equipment transmission shaft is avoided.
[0042] Specifically, in this embodiment, a ventilation plate 25 is provided within the vent pipe 20 near the air outlet 22. The ventilation plate 25 has a vent hole 26 connected to the air outlet 22. The bottom end of the normally closed check plate 24 is hingedly connected to the ventilation plate 25. The normally closed check plate 24 closes the vent hole 26 in the normally closed state. By hingedly connecting the normally closed check plate 24 to the ventilation plate 25, the normally closed check plate 24 extends into the shared exhaust duct 10 only when exhausting air. When exhausting air is not in progress, the normally closed check plate 24 does not extend into the shared exhaust duct 10. This prevents debris from falling into the shared exhaust duct 10 from damaging the valve or clogging the fire check valve, thereby preventing damage to the check valve. Furthermore, the flow cross-section of the shared exhaust duct 10 is not occupied, thereby relatively increasing the flow cross-section of the exhaust duct and facilitating 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 positioned vertically, and the first permanent magnet 42 is disposed at the bottom of the free end of the first bracket 30. The magnetic forces of the first permanent magnet 42 and the first electromagnet 41 are both oriented vertically. This enhances the repulsive force between the first electromagnet 41 and the first permanent magnet 42, effectively pushing the normally closed check plate 24. Of course, the first electromagnetic control assembly 40 can also push the normally closed check plate 24 in a non-vertical magnetic direction.
[0046] In this embodiment, windshields 27 are provided on both sides and the bottom of the normally closed check plate 24. Alternatively, windshields 27 may be provided on only the two sides or the bottom. The windshields 27 on both sides and the bottom rotate with the normally closed check plate 24. The windshields 27 have folded edges that mate with the ventilation plate 25.
[0047] In this embodiment, the first bracket 30 is a bent single-rod structure, and the first bracket 30 can also be a fixed double-rod structure. As an alternative, the first bracket 30 can also be a movable structure, for example, the first bracket 30 can be composed of multiple connecting rods.
[0048] In this embodiment, the gravity piece 50 is further arranged on the normally closed check piece 24. When the fire prevention 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 arranged to make the normally closed check piece 24 return to the normally closed position by gravity. Of course, the elastic piece (not shown in the figure) can also be arranged on the normally closed check piece 24 simultaneously or individually, and the elastic piece is used to assist the return of the normally closed check piece 24.
[0049] Further, in this embodiment, the sealing glue 60 is arranged on the normally closed check piece 24. The sealing glue 60 is arranged at the abutting position of the normally closed check piece 24 and the vent hole 26, and the sealing effect of the abutting position is enhanced by the sealing glue 60, so as to avoid that the exhaust gas of the shared exhaust passage 10 reversely flows into the room.
[0050] In this 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 the fuse (not shown in the figure) and the pressing rod (not shown in the figure). When the fire occurs, the fuse is melted by high temperature, and the pressing rod is popped out to press the normally closed check piece 24 to cover the vent hole 26 of the ventilation plate 25 and block the spread of the fire. The specific structure of the temperature control fire prevention device 70 is the prior art, and thus will not be described here.
[0052] In this embodiment, the fire prevention check valve further includes the wireless interconnection signal generating device (not shown in the figure) arranged outside the vent pipe 20. By arranging the wireless interconnection signal generating device, the fire monitoring or the wind cap linkage control or the remote monitoring can be better implemented.
[0053] In this embodiment, the vent pipe 20 is integrally formed. Of course, the vent pipe 20 can be assembled by using different materials.
[0054] Embodiment Two
[0055] Referring to Figure 3 and Figure 4 , the dashed line is the schematic diagram of the opening state of the normally closed check piece 24. In this embodiment, the normally closed check piece 24 is not provided with the two side wind baffles and the bottom wind baffle 27, and the cost can be saved.
[0056] In this embodiment, the first support 40 is a double support, and the structure stability of the double first support 43 is better. Moreover, in this embodiment, the normally closed check piece 24 is not provided with the gravity piece, but is provided with the elastic piece 80, and the normally closed check piece 24 is a curved plate. The normally closed check piece 24 returns to close and seal the vent hole 26 by the elastic force of the elastic piece 80.
[0057] In this embodiment, other structures are the same as those of embodiment one, and thus will not be described here.
[0058] Embodiment Three
[0059] Referring to Figure 5 and Figure 6 In this embodiment, the cross section of the through pipe 20 is circular, and the normally closed check valve 24 is a flat plate, which is arranged at the outer end of the air outlet 22 of the through pipe 20. The circular cross section of the through pipe 20 is suitable for being installed in the circular reserved port of the shared exhaust duct 10.
[0060] In this embodiment, the structures same as those in Embodiment 1 and Embodiment 2 will not be described again.
[0061] Embodiment 4
[0062] Referring to Figure 7 and Figure 8 In this embodiment, Figure 8 The dashed line in the figure is the open state of the normally closed check valve 24. In this embodiment, the first support 30 is further provided with a second support 31. Of course, the second support 31 can also be arranged on the normally closed check valve 24. A second electromagnetic control assembly 45 is arranged between the free end of the second support 30 and the upper end of the through pipe 20. When the fire check valve stops working, the air extraction equipment outside the air inlet 21 of the through pipe 20 is stopped, the second electromagnetic control assembly 45 is powered on to generate mutual thrust, the normally closed check valve 24 rotates back to the closed air outlet 26 under the action of the thrust to maintain the normally closed state, and the second electromagnetic control assembly 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 arranged at the upper end of the through pipe 20, and the second permanent magnet 47 is arranged at the free end of the second support 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. The through pipe 20 is provided with a through hole (not labeled in the figure), and the second iron core 461 extends into the through hole. Of course, as in Embodiment 5, a recess can be protruded inwardly from the outside of the through pipe 20, and the second iron core 461 and the second coil 462 are arranged in the recess outside the through pipe 20.
[0065] In this embodiment, the structures same as those in Embodiment 1 will not be described again.
[0066] Embodiment 5
[0067] Referring to Figure 9 In this embodiment, a recess 28 is protruded inwardly from the outside of the through pipe 20, and the first electromagnet 41 is arranged in the recess 28. In this way, the volume occupied by the first electromagnet 41 outside the through pipe 20 can be reduced, which is beneficial to reducing the space between the ceiling and the floor and relatively increasing the indoor net height.
[0068] In this embodiment, the structures same as those in Embodiments 1, 2 and 3 will not be described again.
[0069] The above description is only the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A fireproof check valve comprising a vent tube having an air inlet and an air outlet, a panel provided on the outside of the vent tube, a normally closed check disc provided inside the vent tube or outside the air outlet, the bottom of the normally closed check disc rotating to open / close the air outlet, and a temperature control fireproof device provided inside or outside the vent tube, characterized in that: The fire check valve also includes a first bracket, one end of the first bracket is fixed to the windward surface of the normally closed check plate, the other end of the first bracket is a free end and extends in a direction away from the normally closed check plate, and a first electromagnetic control component is provided between the free end of the first bracket 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, and 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, and 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 maintain 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. The fireproof 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 the check plate return to the normally closed position.
6. The fireproof 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 fireproof 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, a curved plate or an irregular plate.
9. The fireproof 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 fireproof check valve according to claim 1, characterized in that: It also includes a wireless interconnection signal generating device arranged outside the air tube.