CN113090767B - Fireproof check valve - Google Patents
Fireproof check valve Download PDFInfo
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- CN113090767B CN113090767B CN202110324608.XA CN202110324608A CN113090767B CN 113090767 B CN113090767 B CN 113090767B CN 202110324608 A CN202110324608 A CN 202110324608A CN 113090767 B CN113090767 B CN 113090767B
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- air outlet
- electromagnet
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- holes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
- F16K1/2007—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member specially adapted operating means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
- F16K1/2042—Special features or arrangements of the sealing
- F16K1/205—Special features or arrangements of the sealing the sealing being arranged on the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0227—Check valves or pivoted valves with the valve members swinging around an axis located at the edge of or outside the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Check Valves (AREA)
Abstract
The invention provides a fireproof check valve which comprises a valve body, a valve plate and a driving device, wherein the valve plate is arranged on the valve body; the valve body is provided with an air outlet surface, the inside of the valve body is provided with a circulation channel, and the circulation channel forms an air outlet on the air outlet surface so that the gas in the circulation channel can be discharged through the air outlet; the valve plate is arranged at a position corresponding to the air outlet, the driving device can drive the valve plate to move in a switching mode between a first position covering the air outlet and a second position opening the air outlet, and the valve plate can be fixed at the first position or the second position. The invention not only can ensure the tightness when closing and prevent the phenomenon of tainting odor, but also can ensure that the opening amount of the valve plate is large enough when opening, thereby ensuring the air exhaust efficiency.
Description
Technical Field
The invention relates to the technical field of residential kitchen and bathroom exhaust duct systems, in particular to a fireproof check valve.
Background
With the continuous progress of science and technology and the increasing productivity level, the fireproof check valve is widely applied to the field of buildings as an important component in an exhaust duct system of kitchens and bathrooms of a house.
At present, the existing fireproof check valve adopts an elastic component to drive a valve plate to plug a flow channel of the fireproof check valve so as to close the fireproof check valve, and the gas pressure entering the fireproof check valve overcomes the elasticity of the elastic component so as to open the flow channel so as to open the fireproof check valve. Adopt such technical scheme elastomeric element can appear elasticity after long-term the use and reduce, lead to the valve block to close not tight phenomenon that the tainting of smells appears, drive the valve block through gas pressure simultaneously and open and cause the opening degree of valve block not enough easily, and then influence the efficiency of airing exhaust.
Disclosure of Invention
The invention aims to provide a fireproof check valve which is reasonable in design and simple in structure, can ensure tightness during closing and prevent odor tainting, and can ensure that the opening amount of a valve plate is large enough during opening so as to ensure the air exhaust efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a fireproof check valve comprises a valve body, a valve plate and a driving device;
the valve body is provided with an air outlet surface, a circulation channel is arranged in the valve body, and the circulation channel forms an air outlet on the air outlet surface so that the gas in the circulation channel can be discharged through the air outlet;
the valve plate is arranged at a position corresponding to the air outlet, the driving device can drive the valve plate to move between a first position covering the air outlet and a second position opening the air outlet in a switching mode, and the valve plate can be fixed at the first position or the second position.
Preferably, the driving device comprises a controller, a first electromagnet and a second electromagnet;
the controller is respectively electrically connected with the first electromagnet and the second electromagnet and can control the first electromagnet and the second electromagnet to be alternatively electrified;
when the first electromagnet is electrified, the first electromagnet can drive the valve plate to move to the first position through electromagnetic force and fix the valve plate on the first position, and when the second electromagnet is electrified, the second electromagnet can drive the valve plate to move to the second position through electromagnetic force and fix the valve plate on the second position.
Preferably, the controller is connected with an external fan and used for acquiring working state information of the external fan in real time and controlling the first electromagnet or the second electromagnet to be electrified according to the information.
Preferably, the air guide sleeve is further included;
the air guide sleeve corresponds to the air outlet and is fixedly connected to the valve body, the first electromagnet is fixedly connected to the valve body, and the second electromagnet is connected to the air guide sleeve.
Preferably, the device also comprises an adjusting screw and an adjusting nut matched with the adjusting screw;
the guide cover comprises a guide plate which corresponds to the air outlet and is arranged at intervals with the valve body, the guide plate is provided with a mounting hole, and the adjusting nut is fixed in the mounting hole;
the two ends of the adjusting screw rod are respectively a first end and a second end, the adjusting screw rod is in threaded connection with the adjusting nut and penetrates through the adjusting nut, so that the first end is located at the position where the guide plate is close to one side of the valve body, the second end is located at the position where the guide plate is far away from one side of the valve body, and the second electromagnet is connected to the first end.
Preferably, the device further comprises a positioning screw;
the side wall of the adjusting nut is provided with a positioning screw hole matched with the positioning screw camera, and the positioning screw is in threaded connection with the positioning screw hole and can be abutted against the adjusting screw rod so as to fix the adjusting screw rod in the adjusting nut.
Preferably, the valve plate is hinged to the valve body.
Preferably, the sealing device further comprises an annular sealing component;
the valve plate is provided with a sealing surface, the shape of the sealing surface is matched with that of the sealing component, when the valve plate is located at the first position, the sealing component surrounds the air outlet, and the valve plate presses the sealing component to the air outlet surface through the sealing surface so as to seal a gap between the sealing surface and the air outlet surface.
Preferably, the sealing device further comprises a countersunk screw, and a through hole is formed in the sealing part;
the sealing surface is provided with a first positioning screw hole matched with the countersunk head screw, the countersunk head screw penetrates through the through hole and is in threaded connection with the first positioning screw hole so as to fix the sealing component on the sealing surface, or the air outlet surface is provided with a second positioning screw hole matched with the countersunk head screw, and the countersunk head screw penetrates through the through hole and is in threaded connection with the second positioning screw hole so as to fix the sealing component on the air outlet surface.
Preferably, the number of the through holes is more than two, the through holes are uniformly distributed along the circumferential direction of the sealing part, and the number of the countersunk head screws is equal to that of the through holes and corresponds to that of the through holes one by one;
the number of the first positioning screw holes is equal to that of the through holes and the first positioning screw holes are in one-to-one correspondence with the through holes, or the number of the second positioning screw holes is equal to that of the through holes and the second positioning screw holes are in one-to-one correspondence with the through holes.
According to the technical scheme, the driving device can drive the valve plate to move in a conversion mode between the first position covering the air outlet and the second position opening the air outlet, and the valve plate can be fixed at the first position or the second position, so that the fire-proof check valve not only can ensure tightness during closing and prevent odor tainting, but also can ensure enough opening amount of the valve plate during opening, and further ensures air exhaust efficiency.
Drawings
FIG. 1 is a schematic view of the open state of the fire check valve of the present invention;
FIG. 2 is a schematic view of the closed state of the fireproof check valve of the present invention;
FIG. 3 is an enlarged view of the portion A in FIG. 2;
fig. 4 is an enlarged schematic view of a portion B in fig. 2.
In the figure: 1-a valve body; 11-air outlet surface; 12-a flow-through channel; 13-air outlet; 14-a hinge shaft; 2, valve plates; 21-sealing surface; 22-a first positioning screw hole; 31-a controller; 32-a first electromagnet; 33-a second electromagnet; 4-a flow guide sleeve; 41-a baffle; 42-mounting holes; 5-adjusting the screw rod; 51-a first end; 52-second end; 6-adjusting the nut; 61-positioning screw holes; 7-a sealing member; 71-a through hole; 8-a set screw; 9-countersunk head screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description of the present invention will be made in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1 and 2, the fire-proof check valve includes a valve body 1, a valve plate 2 and a driving device, the valve body 1 has an air outlet surface 11, the valve body 1 has a flow channel 12 inside, the flow channel 12 forms an air outlet 13 on the air outlet surface 11, so that the air in the flow channel 12 can be discharged through the air outlet 13. The valve plate 2 is arranged at a position corresponding to the air outlet 13, the driving device can drive the valve plate 2 to perform switching motion between a first position covering the air outlet 13 and a second position opening the air outlet 13, and the valve plate 2 can be fixed at the first position or the second position. Can guarantee the accuracy of valve block 2 position when closing or opening air outlet 13 like this, and then reach and can enough guarantee the leakproofness when closing, prevent to appear the phenomenon of tainting with the smell, can make the valve block opening volume enough big when opening moreover, and then guarantee the efficiency of airing exhaust.
Specifically, as shown in fig. 1 and 2, the driving device includes a controller 31, a first electromagnet 32, and a second electromagnet 33, and the controller 31 is electrically connected to the first electromagnet 32 and the second electromagnet 33, respectively, and can control the first electromagnet 32 and the second electromagnet 33 to be alternately energized. When the first electromagnet 32 is energized, the first electromagnet 32 can drive the valve sheet 2 to move to the first position by the electromagnetic force and fix the valve sheet 2 at the first position, and when the second electromagnet 33 is energized, the second electromagnet 33 can drive the valve sheet 2 to move to the second position by the electromagnetic force and fix the valve sheet 2 at the second position. Like this when this put back the check valve and close, first electro-magnet 32 can adsorb valve block 2 at the primary importance, guarantees the leakproofness of closing, prevents to appear the phenomenon of tainting with the smell. When opening, second electro-magnet 33 can adsorb valve block 2 in the second position, makes the valve block open the volume enough big, and then guarantees the efficiency of airing exhaust, still has simple structure simultaneously, the preparation of being convenient for, low cost's advantage.
In actual use, the controller 31 is connected to an external fan (e.g., a range hood or a ventilator) to collect information about the operating state of the external fan in real time, and controls the first electromagnet 32 or the second electromagnet 33 to be powered on according to the information. Taking a kitchen range hood as an example, the controller 31 is electrically connected with the range hood and collects the working state information of the range hood in real time, when the range hood is started, the controller 31 controls the first electromagnet 32 to be powered off and controls the second electromagnet 33 to be powered on simultaneously, so that the valve plate 2 moves to the second position to open the air outlet 13. When the range hood is closed, the controller 31 controls the first electromagnet 32 to be powered on, and controls the second electromagnet 33 to be powered off, so that the valve plate 2 moves to the first position to close the air outlet 13. Further, a temperature sensor (not shown) and a smoke sensor (not shown) may be disposed on a side of the valve plate 2 opposite to the air outlet 13, and both the temperature sensor and the smoke sensor are electrically connected to the controller 31, and when the temperature sensor detects that the temperature of the side of the valve plate 2 opposite to the air outlet 13 is higher than a set value (e.g., 150 ℃) or the smoke sensor detects that the smoke concentration reaches a certain value, the controller 31 controls the first electromagnet 32 to be powered on, and controls the second electromagnet 33 to be powered off, so that the fire check valve is in a closed state. It should be noted that the controller 31 collects the working state information of the external fan in real time, and controls the first electromagnet 32 or the second electromagnet 33 to be alternately energized according to the information, which is not the invention point of the present invention, but is a prior art, and the present invention only utilizes the prior art, and is not intended to improve the prior art, so the working principle of the present invention is not described in detail herein.
As an alternative embodiment, as shown in fig. 1 and fig. 2, the air guide sleeve 4 is further included, the air guide sleeve 4 corresponds to the air outlet 13 and is fixedly connected to the valve body 1, the first electromagnet 32 is fixedly connected to the valve body 1, and the second electromagnet 33 is connected to the air guide sleeve 4.
Specifically, as shown in fig. 1, 2, and 3, the air guide sleeve further includes an adjusting screw 5 and an adjusting nut 6 matched with the adjusting screw 5, the air guide sleeve 4 includes a guide plate 41 corresponding to the air outlet 13 and spaced from the valve body 1, a mounting hole 42 is formed in the guide plate 41, and the adjusting nut 6 is fixed in the mounting hole 42. The two ends of the adjusting screw 5 are respectively a first end 51 and a second end 52, the adjusting screw 5 is screwed in the adjusting nut 6 and penetrates through the adjusting nut 6, so that the first end 51 is located on one side of the guide plate 41 close to the valve body 1, the second end 52 is located on one side of the guide plate 41 far away from the valve body 1, and the second electromagnet 33 is connected to the first end 51. Therefore, the adjusting screw rod 5 can be screwed in or selected from the adjusting nut 6 by rotating the adjusting screw rod, the distance between the first electromagnet 32 and the second electromagnet 33 is changed, namely, the relative distance between the first position and the second position is changed, and then the opening amount of the valve plate 2 is adjusted to adapt to different working requirements. In practical manufacturing, the valve plate 2 may be hinged to the valve body 1, the movement of the valve plate 2 relative to the air outlet 13 is realized by rotating around the hinge shaft 14, and the second electromagnet 33 may be hinged to the first end 51, so as to ensure that the valve plate 2 and the second electromagnet 33 have a larger contact area.
Further, as shown in fig. 3, the adjusting device further comprises a positioning screw 8, a positioning screw hole 61 matched with the positioning screw 8 is arranged on the side wall of the adjusting nut 6, and the positioning screw 8 is screwed in the positioning screw hole 61 and can abut against the adjusting screw rod 5 to fix the adjusting screw rod 5 in the adjusting nut 6. Therefore, after the position of the second electromagnet 33 is adjusted, the adjusting screw 5 can be positioned through the positioning screw 8, so that the stability of the position of the second electromagnet 33 in the using process is ensured.
As an embodiment, as shown in fig. 4, the sealing device further includes an annular sealing member 7;
the valve plate 2 is provided with a sealing surface 21 matched with the sealing component 7 in shape, when the valve plate 2 is located at the first position, the sealing component 7 surrounds the air outlet 13, and the valve plate 2 presses the sealing component 7 to the air outlet surface 11 through the sealing surface 21 so as to seal a gap between the sealing surface 21 and the air outlet surface 11. So as to improve the tightness of the fireproof check valve when the fireproof check valve is closed.
Specifically, as shown in fig. 4, the sealing device further includes a countersunk screw 9, the sealing member 7 is provided with a through hole 71, the sealing surface 21 is provided with a first positioning screw hole 22 matched with the countersunk screw 9, the countersunk screw 9 passes through the through hole 71 and is screwed into the first positioning screw hole 22 to fix the sealing member 7 on the sealing surface 21, or the air outlet surface 11 is provided with a second positioning screw hole (not shown) matched with the countersunk screw 9, and the countersunk screw 9 passes through the through hole 71 and is screwed into the second positioning screw hole to fix the sealing member 7 on the air outlet surface 11. By adopting the technical scheme, the sealing component 7 is convenient to replace, the accuracy and the accuracy of the position of the sealing component 7 can be ensured, the sealing effect is ensured, and in the actual manufacturing process, the sealing component 7 can be a graphite packing so as to prolong the service life, but the sealing component is not limited to the graphite packing.
Further, the number of the through holes 71 is two or more, the two or more through holes 71 are uniformly arranged along the circumferential direction of the sealing part 7, the number of the countersunk screws 9 is equal to the number of the through holes 71 and corresponds to the through holes 71 one by one, the number of the first positioning screw holes 22 is equal to the number of the through holes 71 and corresponds to one by one, or the number of the second positioning screw holes is equal to the number of the through holes 71 and corresponds to one by one. This further improves the security and stability of the mounting of the sealing member 7.
The embodiment of the invention has the advantages that the tightness can be ensured when the valve is closed, the phenomenon of tainting odor can be prevented, the opening amount of the valve plate can be large enough when the valve is opened, and the air exhaust efficiency can be further ensured.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. A fire prevention check valve which characterized in that:
the valve comprises a valve body (1), a valve plate (2), a driving device, a flow guide cover (4), an adjusting screw rod (5) and an adjusting nut (6) matched with the adjusting screw rod (5);
the valve body (1) is provided with an air outlet surface (11), a circulation channel (12) is arranged in the valve body (1), and an air outlet (13) is formed on the air outlet surface (11) of the circulation channel (12) so that the gas in the circulation channel (12) can be discharged through the air outlet (13);
the valve plate (2) is arranged at a position corresponding to the air outlet (13), the driving device can drive the valve plate (2) to move in a switching mode between a first position covering the air outlet (13) and a second position opening the air outlet (13), and the valve plate (2) can be fixed at the first position or the second position;
the driving device comprises a controller (31), a first electromagnet (32) and a second electromagnet (33);
the controller (31) is electrically connected with the first electromagnet (32) and the second electromagnet (33) respectively and can control the first electromagnet (32) and the second electromagnet (33) to be electrified alternately;
when the first electromagnet (32) is electrified, the first electromagnet (32) can drive the valve plate (2) to move to the first position through electromagnetic force and fix the valve plate (2) at the first position, and when the second electromagnet (33) is electrified, the second electromagnet (33) can drive the valve plate (2) to move to the second position through electromagnetic force and fix the valve plate (2) at the second position;
the controller (31) is connected with an external fan and used for acquiring working state information of the external fan in real time and controlling the first electromagnet (32) or the second electromagnet (33) to be electrified according to the information;
the air guide sleeve (4) corresponds to the air outlet (13) and is fixedly connected to the valve body (1), the first electromagnet (32) is fixedly connected to the valve body (1), and the second electromagnet (33) is connected to the air guide sleeve (4);
the air guide sleeve (4) comprises an air guide plate (41) which corresponds to the air outlet (13) and is arranged at an interval with the valve body (1), a mounting hole (42) is formed in the air guide plate (41), and the adjusting nut (6) is fixed in the mounting hole (42);
the both ends of adjusting screw (5) are first end (51) and second end (52) respectively, adjusting screw (5) threaded connection in adjusting nut (6) and pass adjusting nut (6), so that first end (51) are located guide plate (41) are close to one side of valve body (1), second end (52) are located guide plate (41) are kept away from one side of valve body (1), second electro-magnet (33) are connected on first end (51).
2. The fire resistant check valve of claim 1, wherein:
also comprises a positioning screw (8);
the side wall of the adjusting nut (6) is provided with a positioning screw hole (61) matched with the positioning screw (8), and the positioning screw (8) is in threaded connection with the positioning screw hole (61) and can abut against the adjusting screw rod (5) so as to fix the adjusting screw rod (5) in the adjusting nut (6).
3. The fire resistant check valve of claim 1 or 2, wherein:
the valve plate (2) is hinged on the valve body (1).
4. The fire resistant check valve of claim 1 or 2, wherein:
also comprises an annular sealing part (7);
the valve plate (2) is provided with a sealing surface (21) with the shape matched with that of the sealing component (7), when the valve plate (2) is located at the first position, the sealing component (7) surrounds the air outlet (13), and the valve plate (2) is pressed and attached to the air outlet surface (11) through the sealing surface (21) to seal the gap between the sealing surface (21) and the air outlet surface (11).
5. The fire resistant check valve of claim 4, wherein:
the sealing component (7) is provided with a through hole (71);
the sealing surface (21) is provided with a first positioning screw hole (22) matched with the countersunk head screw (9), the countersunk head screw (9) penetrates through the through hole (71) and is in threaded connection with the first positioning screw hole (22) so as to fix the sealing component (7) on the sealing surface (21), or the air outlet surface (11) is provided with a second positioning screw hole matched with the countersunk head screw (9), and the countersunk head screw (9) penetrates through the through hole (71) and is in threaded connection with the second positioning screw hole so as to fix the sealing component (7) on the air outlet surface (11).
6. The fire resistant check valve of claim 5, wherein:
the number of the through holes (71) is more than two, the through holes (71) are uniformly distributed along the circumferential direction of the sealing part (7), and the number of the countersunk head screws (9) is equal to that of the through holes (71) and corresponds to that of the through holes (71);
the number of the first positioning screw holes (22) is equal to that of the through holes (71) and corresponds to that of the through holes one by one, or the number of the second positioning screw holes is equal to that of the through holes (71) and corresponds to that of the through holes one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110324608.XA CN113090767B (en) | 2021-03-26 | 2021-03-26 | Fireproof check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110324608.XA CN113090767B (en) | 2021-03-26 | 2021-03-26 | Fireproof check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113090767A CN113090767A (en) | 2021-07-09 |
| CN113090767B true CN113090767B (en) | 2022-06-17 |
Family
ID=76669974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110324608.XA Active CN113090767B (en) | 2021-03-26 | 2021-03-26 | Fireproof check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113090767B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883308B (en) * | 2021-11-04 | 2024-06-04 | 杭州老板电器股份有限公司 | Fume exhaust fan system |
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| CN202885059U (en) * | 2012-10-30 | 2013-04-17 | 宁波方太厨具有限公司 | Air outlet device for smoke exhauster |
| CN104482256A (en) * | 2014-12-17 | 2015-04-01 | 徐仁春 | Intelligent electrically-operated check valve |
| CN105570519A (en) * | 2016-01-28 | 2016-05-11 | 顾钰锋 | Magnetic check valve |
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| BE1024421B1 (en) * | 2016-07-20 | 2018-02-20 | Atlas Copco Airpower Naamloze Vennootschap | Check valve assembly |
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| CN113090767A (en) | 2021-07-09 |
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