CN113864499A - Fireproof check valve with internal and external double fireproof functions - Google Patents
Fireproof check valve with internal and external double fireproof functions Download PDFInfo
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- CN113864499A CN113864499A CN202111236398.5A CN202111236398A CN113864499A CN 113864499 A CN113864499 A CN 113864499A CN 202111236398 A CN202111236398 A CN 202111236398A CN 113864499 A CN113864499 A CN 113864499A
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- 230000006870 function Effects 0.000 title claims abstract description 21
- 230000009471 action Effects 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims 6
- 230000008859 change Effects 0.000 abstract description 8
- 239000000779 smoke Substances 0.000 description 12
- 239000012943 hotmelt Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/386—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the closure members being rotatable or pivoting
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/40—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention provides a fireproof check valve with an internal and external double fireproof functions, which comprises a valve body, a valve clack capable of opening and closing and a fireproof execution device, wherein the valve body is arranged outside a residential exhaust passage; the support is arranged on the valve body and positioned on the back side of the valve clack, the rotating shaft is arranged on the support, the elastic piece is positioned at the rotating shaft, the fireproof execution piece is provided with a connecting part and an acting part, and the connecting part of the fireproof execution piece is connected with the rotating shaft; the valve body is provided with a through hole, the outer temperature sensing piece is positioned on the outer side of the valve body and is communicated with the indoor environment, the inner temperature sensing piece is positioned on the inner side of the valve body and is communicated with the environment in the house exhaust passage, the outer temperature sensing piece and/or the inner temperature sensing piece penetrate through the through hole, and the inner temperature sensing piece is used for limiting the fireproof executing piece and compressing the elastic piece; the invention can sense the indoor temperature change and the temperature change in the house exhaust passage in time, and has the advantages of simple structure and strong practicability.
Description
Technical Field
The invention belongs to the technical field of fireproof check valves, and particularly relates to a fireproof check valve with an internal and external fireproof function.
Background
The fire-proof check valve is one of the important components of the residential exhaust duct system, and the main functions of the fire-proof check valve are divided into the following three aspects:
1) flow guiding function: the smoke in the house is guided to be organically discharged upwards into the house exhaust duct and finally discharged from the roof, so that the high-altitude discharge is realized. The air curtain and the vortex are prevented from being formed at the air inlet of the residential exhaust passage, and the smoke discharge resistance is reduced.
2) Check function: when the smoke is discharged, the valve clack is opened under the pushing of the wind power of the range hood or the exhaust fan, and the smoke is allowed to flow into the exhaust passage; when the smoke discharge is stopped, the valve clack is automatically closed under the action of gravity/spring force, so that the smoke backflow is prevented, and the smoke and odor mixing phenomena are avoided.
3) Fireproof effect: in case of fire, when the temperature rises to a specified value, the fire-proof executing mechanism acts to force the valve clack to be forcibly closed and locked in a closed state, so that the spread of smoke and fire is avoided, and the fire-proof safety is ensured.
At present, the fireproof check valves in the prior art have different fireproof structures, for example, chinese patent application No. cn200920212736.x discloses a side-opening fireproof check valve, which is installed and fixed on the outer wall of an exhaust passage, the fireproof check valve consists of a check valve and a fireproof valve, the check valve and the fireproof valve are connected through a fixing piece, the fireproof valve comprises a reversible cover plate and a base for installing the cover plate, the cover plate is supported by a spring and a fusible support part to be in a normally open state, one end of the support part is connected with a valve body of the fireproof valve, and the other end is connected with the cover plate, wherein the reversible cover plate is in a side-opening type, is laterally installed on the fireproof valve and can be transversely turned around a shaft to close or open an opening of a diversion flue; the fusible support member includes at least two fusing points.
For another example, chinese patent application 201710954705.0 discloses a fire prevention check valve, include the valve body and locate the valve block in the valve body, its characterized in that still includes locking device, locking device includes drive valve block closed drive arrangement and spacing drive arrangement's hot melt retaining member, when hot melt retaining member did not melt, locking device locked drive arrangement, the valve block can normally be opened and support and carry out spacingly on drive arrangement, when hot melt retaining member melted, locking device removed the locking to the valve block, drive arrangement drive valve block is in the closed condition.
However, the fire-proof structure adopted in the prior art is either aimed at external fire-proof of the residential exhaust duct or aimed at internal fire-proof of the residential exhaust duct, or two sets of fire-proof structures are arranged to respectively correspond to the residential exhaust duct and the indoor, so that the structure of the fire-proof check valve is extremely complex, and the fire-proof structure is arranged in the exhaust passage, so that the exhaust resistance is increased.
Therefore, improvements are needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a fireproof check valve with an internal and external double fireproof function, which can sense the indoor temperature change and the temperature change in an exhaust passage of a house in time so as to realize the internal and external double fireproof function and has the advantages of simple structure and strong practicability.
In order to achieve the purpose, the invention provides a fireproof check valve with an internal and external double fireproof functions, which comprises a valve body, a valve clack capable of opening and closing and a fireproof execution device for locking the valve clack, wherein the valve body is arranged outside a residential exhaust passage;
the support is arranged on the valve body and is positioned on the back side of the valve clack;
the rotating shaft is arranged on the support;
the elastic piece is arranged on the support and positioned at the rotating shaft;
the fireproof executing piece is provided with a connecting part and an acting part, and the connecting part of the fireproof executing piece is connected with the rotating shaft;
the valve body is provided with a through hole, the outer temperature sensing piece is positioned on the outer side of the valve body and is communicated with the indoor environment, the inner temperature sensing piece is positioned on the inner side of the valve body and is communicated with the environment in the house exhaust passage, the outer temperature sensing piece and/or the inner temperature sensing piece penetrate through the through hole, the outer temperature sensing piece is connected with the inner temperature sensing piece, and the inner temperature sensing piece is used for limiting the fireproof executing piece and compressing the elastic piece;
when the temperature inside and/or outside the house exhaust passage reaches a set value in a fire disaster, the internal temperature sensing piece limits the fireproof executing piece to lose effectiveness, and the action part of the fireproof executing piece rotates around the rotating shaft by utilizing the elastic piece, so that the valve clack is locked in a closed state.
In the technical scheme of the invention, the inner temperature sensing piece and the outer temperature sensing piece which are connected with each other are adopted to respectively sense the temperature in the exhaust passage of the house and the indoor temperature, and the inner temperature sensing piece and the outer temperature sensing piece are in heat conduction connection, namely, the outer temperature sensing piece and the inner temperature sensing piece can be separated from each other when the temperature reaches a set value as long as the outer temperature sensing piece and the inner temperature sensing piece generate high temperature at one position, so that the inner temperature sensing piece can limit the position of the fireproof executing piece to be invalid, and the fireproof executing piece executes fireproof action.
Furthermore, the fireproof execution device is arranged on the back side of the valve clack, does not occupy an exhaust channel, does not cause resistance to smoke exhaust, and is convenient for improving the smoothness of exhaust; simultaneously outer temperature-sensing piece sets up in the outside of valve body and is located and communicates with indoor environment, and then the indoor ambient temperature of real-time perception, has avoided traditional interior fire resistive construction to set up in the admit air side of valve clack and lead to being wrapped up by exhaust branch pipe (for example the structure of prior patent 201921148868.0), can't direct response indoor ambient temperature.
Specifically, the outer temperature sensing piece penetrates through the valve body and is bonded with the inner temperature sensing piece, and the bonding medium is temperature-controlled fusible metal. When fire disaster happens outside (indoor) the exhaust passage, the outer temperature sensing piece is heated to melt the temperature control metal and separate from the inner temperature sensing piece, and the fireproof executing piece generates fireproof action by utilizing the action of the elastic piece to drive the valve clack to be closed and locked in a closed state; when oil stain in the exhaust passage catches fire, the inner temperature sensing piece is heated to melt the temperature control metal, the temperature control metal is separated from the outer temperature sensing piece, the fire-proof execution piece is driven to act by the resilience acting force of the elastic piece, and the valve clack is driven to be closed and locked in a closed state.
In another embodiment of the present invention, the back side of the valve flap is provided with an engaging portion, and the acting portion of the fire-proof actuator can abut against the engaging portion to restrict the valve flap from being opened.
As another specific embodiment of the present invention, the action portion comprises at least one abutting plate, the engaging portion comprises at least one stopping plate, the stopping plate has a stopping edge for abutting engagement, and the abutting plate can abut against the stopping edge.
As another specific embodiment of the present invention, the stopping edge is arc-shaped and is provided with a plurality of latch teeth for abutting and matching with the abutting plate.
As another embodiment of the invention, the abutment plate is provided with a bevel for a snap fit to form a ratchet.
As another specific embodiment of the present invention, the abutting plate is provided with a slot, the slot has an opening, a slot bottom of the slot abuts against the stopping edge, and left and right side walls of the slot are located at two sides of the stopping edge.
As another specific embodiment of the invention, the matching part is provided with two stop plates which are relatively fixed and are respectively positioned at two sides of the vertical center line of the valve clack, two clamping grooves are arranged on the butt plates, and the two clamping grooves can be matched and abutted with the stop edges on the two stop plates, so that multi-point support is formed.
As another specific embodiment of the invention, the action part is provided with a through hole, and the inner temperature sensing piece penetrates out of the through hole and is limited and connected with the action part through the connecting pin.
As another specific embodiment of the present invention, the outer temperature sensing member includes a temperature sensing connecting rod and a locking member, the locking member locks the temperature sensing connecting rod at the through hole, and the temperature sensing connecting rod penetrates from the through hole to the inner side of the valve body and is connected to the inner temperature sensing member.
As another embodiment of the present invention, the elastic member is a torsion spring.
The invention has the following beneficial effects:
the invention senses the temperature of the environment inside the residential exhaust duct through the inner temperature sensing element, senses the outside (indoor) of the residential exhaust duct through the outer temperature sensing element, simultaneously detects the temperature inside and outside the residential exhaust duct by connecting the inner temperature sensing element and the outer temperature sensing element in a heat conduction manner, and limits the fireproof executing element through the inner temperature sensing element, so that the fireproof executing element can generate fireproof action by utilizing the elastic element when the inner temperature sensing element and the outer temperature sensing element are separated once a fire disaster occurs, and the valve clack is enabled to be closed and locked in a closed state.
The invention adopts a single fireproof executing piece to lock the valve clack, and limits the fireproof executing piece through the outer temperature sensing piece and the inner temperature sensing piece which are connected with each other, thereby simultaneously sensing the indoor temperature change and the temperature change in the house exhaust passage, and having the advantages of simple structure and strong practicability.
The matching stability between the upper acting part of the fireproof executing piece and the matching part on the back side of the valve clack is good, the supporting effect is good, leakage in fire is avoided, an airflow channel between an exhaust passage and a resident is cut off, and fire spreading is prevented.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a fire check valve according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of the closed position of the valve flap according to example 1 of the present invention;
FIG. 3 is a first schematic view showing the valve flap locked in the embodiment 1 of the present invention;
FIG. 4 is a second schematic view showing the valve flap locked in the embodiment 1 of the present invention;
FIG. 5 is a schematic structural diagram of a fire-protection actuator according to embodiment 1 of the present invention;
FIG. 6 is a schematic structural diagram of a fire-proof actuator according to embodiment 1 of the present invention;
FIG. 7 is a schematic view of an inner temperature-sensing element and an outer temperature-sensing element according to embodiment 1 of the present invention;
fig. 8 is a schematic view of the installation of the fire check valve according to embodiment 1 of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Example 1
The invention provides a fireproof check valve with an internal and external double fireproof function, as shown in fig. 1-8, the fireproof check valve comprises a valve body 100, a valve clack 200 capable of opening and closing and a fireproof executing device 300 for locking the valve clack 200, wherein the valve body 100 is arranged on an exhaust passage and positioned outside the exhaust passage, the valve body 100 is used for providing an exhaust passage, the valve clack 200 is opened when the exhaust is finished, the valve clack 200 is closed when the exhaust is finished, and the fireproof executing device 300 locks the valve clack 200 at the closed position when a fire disaster occurs.
The fireproof executing device 300 comprises a support 310, a rotating shaft 320, an elastic member 330, a fireproof executing member 340, an outer temperature sensing member 350 and an inner temperature sensing member 360;
the support 310 is arranged on the valve body 100 and located on the back side of the valve clack 200, the rotating shaft 320 is arranged on the support 310 and parallel to the valve shaft 201 on the valve clack 200, the elastic member 330 is arranged on the support 310 and located at the rotating shaft 320, preferably, the elastic member 330 is a torsion spring, the fireproof executing member 340 is provided with a connecting part 341 and an acting part 342, and the connecting part 341 of the fireproof executing member 340 is connected with the rotating shaft 320;
the valve body 100 is provided with a through hole 101, the outer temperature sensing piece 350 is positioned on the outer side of the valve body 100 and is communicated with the indoor environment, the inner temperature sensing piece 360 is positioned on the inner side of the valve body 100 and is communicated with the environment in the house exhaust passage, the outer temperature sensing piece 350 and/or the inner temperature sensing piece 360 penetrate through the through hole 101, the outer temperature sensing piece 350 is connected with the inner temperature sensing piece 360, and the inner temperature sensing piece 360 is used for limiting the fireproof executing piece 340 and compressing the elastic piece 330;
specifically, a through hole 343 is provided on the action part 342 of the fireproof actuator 340, and the inner temperature sensing member 360 penetrates out of the through hole 343 and is connected (specifically, abutted) to the action part 342 in a limited manner by a connecting pin 370, so as to limit the action part 342 to rotate around the rotating shaft 320;
further, as shown in fig. 7, the outer temperature sensing member 350 includes a temperature sensing connecting rod 351 and a locker 352, the locker 352 locks the temperature sensing connecting rod 351 at the through hole 101, and the temperature sensing connecting rod 351 penetrates from the through hole 101 to the inside of the valve body 100 and is connected to the inner temperature sensing member 360.
The inner temperature sensing piece 360 and the outer temperature sensing piece 350 are bonded together, the bonding medium is temperature control fusible metal 380, and heat conduction connection is formed between the inner temperature sensing piece 360 and the outer temperature sensing piece, namely, no matter the outer temperature sensing piece 350 or the inner temperature sensing piece 360 is in high temperature exceeding the set temperature, the outer temperature sensing piece 350 and the inner temperature sensing piece 360 can be separated, and the fireproof executing piece 340 is triggered to execute fireproof action.
When the temperature-controlled fusible metal 380 is applied to a kitchen, the melting point of the temperature-controlled fusible metal 380 is 150 ℃, and when the temperature-controlled fusible metal 380 is applied to a toilet, the melting point of the temperature-controlled fusible metal 380 is 70 ℃, and the specific melting point of the temperature-controlled fusible metal 380 can be selectively adjusted according to relevant regulations of different applications in the industry.
When a fire occurs, the external thermal sensing element 350 and/or the internal thermal sensing element 360 are separated from each other under the action of high temperature, and the fireproof executing element 340 rotates around the rotating shaft 320 by the elastic element 330, so that the acting part 342 of the fireproof executing element 340 is buckled on the valve flap 200.
A preferred abutting engagement structure for achieving locking of the valve flap 200 in the closed position in this embodiment is shown in fig. 3-6.
The back side of the valve flap 200 is provided with a rocker arm 202 for rotational connection, the rocker arm 202 providing an engagement portion 203, and the action portion 342 being capable of abutting against the engagement portion 203 to restrict the valve flap 200 from being opened.
Wherein the action portion 342 comprises an abutting plate 344, the engagement portion 203 comprises a stop plate 204, the stop plate 204 has a stop edge, the stop edge is specifically an arc-shaped stop edge, the valve flap 200 is pressed in the closed position without being opened by the abutting relationship formed between the abutting plate 344 and the arc-shaped stop edge, wherein a triangular support is formed among the abutting plate 344, the stop plate 204 and the support 310, and the structural stability is good.
Further, a plurality of latch teeth 205 are arranged on the stopping edge, the abutting plate 344 is provided with an inclined surface for the latch teeth 205 to cooperate to form a ratchet tooth 345, as shown in fig. 3 and 6, a one-way sliding fit is formed between the latch teeth 205 and the ratchet tooth 345, even in case of fire, the supporting relationship between the two can be kept without failure, and thus the sealing of the valve flap 200 is realized.
In order to further improve the stability and ensure the sealing of the valve flap 200, the abutting plate 344 in this embodiment is provided with a clamping groove 346, the clamping groove 346 has an opening, the bottom of the clamping groove 346 abuts against the stopping edge, and the left side wall and the right side wall of the clamping groove 346 are located on two sides of the stopping edge to form left and right limiting positions.
Still further, the matching portion 203 is provided with two stop plates 204, the two stop plates 204 are relatively fixed and are respectively located at two sides of the vertical center line of the valve flap 200, as shown in fig. 1 and 3, the abutting plate 344 is provided with two clamping grooves 346, and the two clamping grooves 346 can be matched and abutted with the stop edges on the two stop plates 204, so as to form a multi-point support.
The valve body 100 in this embodiment is installed outside the residential exhaust duct 400, as shown in fig. 8, the external temperature sensing member 350 is installed by penetrating the valve body 100, and a part of the external temperature sensing member is exposed outside the valve body 100 and is not shielded by the exhaust branch pipe 500 connected to the range hood, so that the indoor temperature change can be sensed in time in case of fire; the other part of the valve body extends into the valve body 100 and is connected with the inner temperature sensing element 360, and the temperature change of the exhausted air can be sensed in time through the inner temperature sensing element 360 in case of fire, so that the temperature inside and outside the residential exhaust duct 400 can be detected simultaneously, and the requirement of bidirectional fire prevention is met finally.
In other examples of the present invention, the outer temperature sensing member 350 may be fixed to the valve body 100 by riveting, welding, or bolting.
In order to facilitate smoke evacuation and exhaust, the valve body 100 in this embodiment is a diversion valve body, which has a top wall plate 102 inclined upward along the exhaust direction, so that the smoke entering the valve body 100 is rapidly exhausted to the interior of the residential exhaust duct 400, and the corresponding air inlet pipe 103 arranged on the valve body 100 also has the same inclined direction as the top wall plate 102 to provide an inclined upward air inlet direction, which is beneficial to the rapid entry and upward exhaust of the gas into the residential exhaust duct 400, as shown in fig. 8; of course, other valve body structures capable of realizing normal smoke exhaust and exhaust can be adopted.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (10)
1. A kind of fire-proof check valve with double-fireproof function inside and outside, the said fire-proof check valve includes the valve block, valve flap that can open and shut and fire-proof actuator used for locking the valve flap, characterized by that, the said valve block is installed outside the residential exhaust duct, the said fire-proof actuator includes the support, spindle, elastic component, fire-proof actuator, outer temperature sensing piece and inner temperature sensing piece;
the support is arranged on the valve body and is positioned on the back side of the valve clack;
the rotating shaft is arranged on the support;
the elastic piece is arranged on the support and positioned at the rotating shaft;
the fireproof executing piece is provided with a connecting part and an acting part, and the connecting part of the fireproof executing piece is connected with the rotating shaft;
the valve body is provided with a through hole, the outer temperature sensing piece is positioned on the outer side of the valve body and is communicated with an indoor environment, the inner temperature sensing piece is positioned on the inner side of the valve body and is communicated with an environment in the house exhaust passage, the outer temperature sensing piece and/or the inner temperature sensing piece penetrate through the through hole, the outer temperature sensing piece is connected with the inner temperature sensing piece, and the inner temperature sensing piece is used for limiting the fireproof executing piece and simultaneously compressing the elastic piece;
when the temperature inside and/or outside the house exhaust passage reaches a set value in a fire disaster, the inner temperature sensing piece limits the fireproof executing piece to lose effectiveness, and the action part of the fireproof executing piece rotates around the rotating shaft by utilizing the elastic piece, so that the valve clack is locked in a closed state.
2. A fire check valve having both inner and outer fire prevention functions as claimed in claim 1, wherein an engaging portion is provided on a back surface side of the valve flap, and an operating portion of the fire prevention actuator is capable of abutting against the engaging portion to restrict the valve flap from being opened.
3. A fire protection check valve with inner and outer fire protection functions as claimed in claim 2, wherein said acting portion comprises at least one abutting plate, and said engaging portion comprises at least one stopping plate having a stopping edge for abutting engagement, and said abutting plate is capable of abutting against said stopping edge.
4. A fire protection check valve with inner and outer fire protection functions as claimed in claim 3, wherein the stopping edge is arc-shaped and has a plurality of latches thereon for abutting engagement with the abutting plate.
5. A fire-resistant check valve with inner and outer fire-resistant functions as claimed in claim 4, wherein said abutting plate is provided with an inclined surface for said latch to engage to form a ratchet.
6. A fire-resistant check valve with inner and outer fire-resistant functions as claimed in claim 3, wherein said abutting plate is provided with a locking groove having an opening, a groove bottom of said locking groove abuts against said stopping edge, and left and right side walls of said locking groove are located at both sides of said stopping edge.
7. A fireproof check valve with inner and outer fireproof functions as claimed in claim 6, wherein the engaging portion has two stop plates fixed relatively and located on two sides of the vertical center line of the valve flap, and the abutting plate is provided with two engaging grooves capable of engaging with the stop edges on the two stop plates to form a multi-point support.
8. The fire-proof check valve with inner and outer fire-proof functions as claimed in claim 1, wherein the acting part is provided with a through hole, and the inner temperature sensing element is passed through the through hole and is connected to the acting part in a limited manner by a connecting pin.
9. A fire-proof check valve with inner and outer fire-proof functions as claimed in claim 1, wherein said outer temperature sensing member comprises a temperature sensing connecting rod and a locking member, said locking member locks said temperature sensing connecting rod at said through hole, said temperature sensing connecting rod penetrates into the inner side of said valve body from said through hole and is connected with said inner temperature sensing member.
10. A fire-resistant check valve with inner and outer fire-resistant functions as claimed in claim 1, wherein said inner temperature sensing member and said outer temperature sensing member are bonded together by using a temperature-controlled fusible metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236398.5A CN113864499B (en) | 2021-10-22 | 2021-10-22 | Fireproof check valve with inner and outer fireproof functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236398.5A CN113864499B (en) | 2021-10-22 | 2021-10-22 | Fireproof check valve with inner and outer fireproof functions |
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| Publication Number | Publication Date |
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| CN113864499A true CN113864499A (en) | 2021-12-31 |
| CN113864499B CN113864499B (en) | 2024-03-15 |
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| CN202111236398.5A Active CN113864499B (en) | 2021-10-22 | 2021-10-22 | Fireproof check valve with inner and outer fireproof functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790291A (en) * | 2021-10-22 | 2021-12-14 | 广州市彩蝶节能技术有限公司 | Fireproof check valve |
| CN113864492A (en) * | 2021-10-22 | 2021-12-31 | 广州市彩蝶节能技术有限公司 | Outer water conservancy diversion formula fire prevention check valve |
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| CN216479098U (en) * | 2021-10-22 | 2022-05-10 | 广州市彩蝶节能技术有限公司 | Outer water conservancy diversion formula fire prevention check valve |
| CN216479099U (en) * | 2021-10-22 | 2022-05-10 | 广州市彩蝶节能技术有限公司 | Unobstructed fire prevention check valve admits air |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113790291A (en) * | 2021-10-22 | 2021-12-14 | 广州市彩蝶节能技术有限公司 | Fireproof check valve |
| CN113864492A (en) * | 2021-10-22 | 2021-12-31 | 广州市彩蝶节能技术有限公司 | Outer water conservancy diversion formula fire prevention check valve |
| CN113790291B (en) * | 2021-10-22 | 2024-08-16 | 广州市彩蝶节能技术有限公司 | Fireproof check valve |
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