CN217355688U - Selector valve and fire extinguishing system - Google Patents
Selector valve and fire extinguishing system Download PDFInfo
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- CN217355688U CN217355688U CN202221470370.8U CN202221470370U CN217355688U CN 217355688 U CN217355688 U CN 217355688U CN 202221470370 U CN202221470370 U CN 202221470370U CN 217355688 U CN217355688 U CN 217355688U
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Abstract
The utility model relates to a fire-fighting equipment field particularly, relates to a selector valve and fire extinguishing system. The selection valve comprises a valve body and a plurality of puncture valves; the valve body is provided with a main channel, a plurality of movable channels and a plurality of flow guide channels, and a partition wall is arranged between each movable channel and the main channel; each movable channel is correspondingly communicated with one flow guide channel; the plurality of puncture valves are connected with the valve body, each puncture valve corresponds to one movable channel, and each puncture valve is used for puncturing the partition wall between the corresponding movable channel and the main channel so as to conduct the corresponding movable channel and the main channel, and further to conduct the flow guide channel conducted with the corresponding movable channel and the main channel. The selector valve has the advantages of simple structure, high working reliability and quick response, and is suitable for pipeline regulation of a fire-fighting system.
Description
Technical Field
The utility model relates to a fire-fighting equipment field particularly, relates to a selector valve and fire extinguishing system.
Background
The selector valve is a selective control valve, is usually used for pipeline regulation of fire extinguishing systems, and branch control of the general selector valve is realized through the electromagnetic valve, but the electromagnetic valve has the advantages of high cost, slow response and low reliability, can only control a single channel, cannot complete multi-channel control, and has a limited application range.
In order to solve the limitation of the conventional selector valve and meet the requirements of multichannel control and rapid response of the pipeline of the fire-fighting system, the selector valve suitable for branch regulation of pressure storage type and non-pressure storage type fire-fighting systems is urgently needed to be developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a selection valve and fire extinguishing system, its simple structure, the operational reliability is high, and the response is rapid, the pipeline of suitable fire extinguishing system adjusts.
The embodiment of the utility model is realized like this:
in a first aspect, the present invention provides a selector valve, including:
the valve body is provided with a main channel, a plurality of movable channels and a plurality of flow guide channels, and a partition wall is arranged between each movable channel and the main channel; each movable channel is correspondingly communicated with one flow guide channel;
and each puncture valve is used for puncturing the partition wall between the corresponding movable channel and the main channel so as to conduct the corresponding movable channel and the main channel, and further the flow guide channel which is conducted with the corresponding movable channel is conducted with the main channel.
In an alternative embodiment, the main passage extends through the valve body; along the axial direction of the main channel, a plurality of movable channels are arranged at intervals in sequence.
In an alternative embodiment, the lancing valve includes a valve seat, a valve stem, and a driver;
the valve seat is connected with the valve body; the valve seat is provided with a movable cavity communicated with the corresponding movable channel, and the valve rod is movably arranged in the movable cavity;
the driving member is used for driving the valve rod to move relative to the valve seat towards the direction of the movable channel, so that the valve rod can pierce the separation wall.
In an optional embodiment, the valve rod is cylindrical, one end of the valve rod facing the movable channel is a tip, and the outer peripheral surface of the valve rod is provided with a plurality of through holes.
In an alternative embodiment, the tip of the valve stem has a hardness greater than the hardness of the dividing wall.
In an alternative embodiment, the puncture valve further comprises a piston movably arranged in the movable cavity and connected with the valve rod;
the piston is used for dividing the movable cavity into a first cavity and a second cavity;
the first cavity is located on one side, away from the movable channel, of the valve seat, and the driving piece is contained in the first cavity.
In an alternative embodiment, the valve seat of each piercing valve is connected to the corresponding movable channel;
the valve seat and each movable channel comprise a first section and a second section; the first section is communicated with the second section;
the first section is used for being in threaded connection with the corresponding valve seat, and the second section is communicated with the corresponding flow guide channel.
In an alternative embodiment, the driver comprises an electric squib, which is connected with the valve seat and is used for being electrically connected with an external circuit;
the electric detonator is used for generating high-pressure gas in the first chamber so as to drive the piston and the valve rod to move.
In an optional embodiment, the selector valve further comprises a plurality of connectors, and the ends of the main channel and the flow guide channel, which are positioned on the surface of the valve body, are connected with one connector; the connector is used for communicating with external pipeline.
In a second aspect, the present invention provides a fire fighting system, which comprises a main pipe, a plurality of sub pipes and the above-mentioned selector valve;
the selection valve is communicated with the main pipe body, and the plurality of sub pipe bodies are communicated with the plurality of flow guide channels in a one-to-one correspondence manner.
The utility model discloses beneficial effect includes:
the selection valve comprises a valve body and a plurality of puncture valves; the valve body is provided with a main channel, a plurality of movable channels and a plurality of flow guide channels, and a partition wall is arranged between each movable channel and the main channel; each movable channel is correspondingly communicated with one flow guide channel; the plurality of puncture valves are connected with the valve body, each puncture valve corresponds to one movable channel, and each puncture valve is used for puncturing the partition wall between the corresponding movable channel and the main channel so as to conduct the corresponding movable channel and the main channel, and further enable the flow guide channel which is conducted with the corresponding movable channel to be conducted with the main channel.
In the working process of the selector valve, one or more flow guide channels can be determined to be communicated with the main channel according to the use requirement by controlling the action of the puncture valve; in addition, in the using process of the selector valve, the mode that the main channel and the movable channel are blocked by the partition wall is adopted, so that the tightness of the selector valve can be improved, and the phenomenon that fire extinguishing agents or other forms of fluids in the main channel leak into the flow guide channel is avoided.
In conclusion, the selector valve is simple in structure, high in working reliability and quick in response, and is suitable for pipeline adjustment of a fire-fighting system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a selector valve according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a valve body in an embodiment of the present invention;
fig. 3 is a cross-sectional view of a first viewing angle of a valve body in an embodiment of the present invention;
fig. 4 is a cross-sectional view of a second perspective of the valve body in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a selector valve and a connector according to an embodiment of the present invention;
fig. 6 is a cross-sectional view of a first viewing angle of a selector valve in an embodiment of the present invention;
fig. 7 is a cross-sectional view of a second viewing angle of the selector valve in an embodiment of the present invention;
fig. 8 is a cross-sectional view of a puncture valve in an embodiment of the present invention.
Icon 200-selection valve; 210-a valve body; 211-main channel; 212-active channel; 213-a flow guide channel; 214-a partition wall; 220-a puncture valve; 221-a valve seat; 222-a valve stem; 223-a drive member; 224-via holes; 225-a piston; 226-a first chamber; 227-a second chamber; 228-electric blasting tube; 230-connecting head.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 7, the present embodiment provides a selector valve 200, including:
the valve body 210 is provided with a main channel 211, a plurality of movable channels 212 and a plurality of flow guide channels 213, and a partition wall 214 is arranged between each movable channel 212 and the main channel 211; each active channel 212 is correspondingly communicated with one flow guide channel 213;
and a plurality of puncture valves 220, each puncture valve 220 is connected with the valve body 210, each puncture valve 220 corresponds to one movable channel 212, and each puncture valve 220 is used for puncturing the separation wall 214 between the corresponding movable channel 212 and the main channel 211 so as to conduct the corresponding movable channel 212 with the main channel 211, thereby conducting the flow guide channel 213 which is conducted with the corresponding movable channel 212 with the main channel 211.
Referring to fig. 1 to 7, the operating principle of the selector valve 200 is as follows:
in the working process of the selector valve 200, one or more of the flow guide channels 213 can be determined to be communicated with the main channel 211 according to the use requirement by controlling the action of the puncture valve 220; in addition, during the use process of the selector valve 200, the main channel 211 is blocked from the movable channel 212 by the partition wall 214, so that the tightness of the selector valve 200 can be improved, and the fire extinguishing agent or other forms of fluid in the main channel 211 are prevented from leaking into the flow guide channel 213.
Based on the above, compared with the device in the prior art, the device of the present invention realizes physical isolation of the main channel and the movable channel 212 through the isolation wall 214, and during operation, the isolation wall 214 between the main channel and the movable channel 212 is pierced under the effect of the piercing valve 220 to communicate the main channel and the movable channel 212, so that the fire extinguishing agent of the main channel can be prevented from leaking into the movable channel 212 when the device is not in operation, and the working reliability is high. Secondly, the selector valve 200 has the flow guide channel 213, and after the plurality of puncture valves 220 puncture the corresponding partition walls 214, the fire extinguishing agent can be simultaneously conveyed to the plurality of flow guide channels 213, thereby greatly improving the fire extinguishing efficiency.
In conclusion, the selector valve 200 has the advantages of simple structure, high working reliability and quick response, and is suitable for pipeline adjustment of a fire-fighting system.
It should be noted that, in this embodiment, when the main passage 211, the movable passage 212 and the flow guide passage 213 are provided, the valve body 210 may be manufactured by integrally molding or drilling, and when the partition wall 214 is formed, the partition wall 214 is manufactured integrally with the valve body 210, so as to improve the operation stability of the selector valve 200, and further avoid the fire extinguishing agent or other types of fluid in the main passage 211 from leaking into the flow guide passage 213; when the partition wall 214 is provided, the thickness of the partition wall 214 needs to be reduced while the partition wall 214 blocks the main channel 211 and the corresponding movable channel 212, so that the puncture valve 220 can puncture the partition wall 214 by a certain external force and the main channel 211 and the movable channel 212 are communicated, and the partition wall 214 can bear the pressure of the main channel 211 because the fluid in the main channel 211 has a certain pressure while the partition wall 214 is thinned.
Further, referring to fig. 1 to 7, in the present embodiment, in order to facilitate the connection between the selector valve 200 and the external pipeline, the selector valve 200 further includes a plurality of connectors 230, and the ends of the main channel 211 and the flow guide channel 213 on the surface of the valve body 210 are connected to one connector 230; the connector 230 is used for communicating with an external pipeline. Also, when the main passage 211 is provided, the main passage 211 penetrates the valve body 210; the plurality of movable passages 212 are arranged at intervals in sequence along the axial direction of the main passage 211.
Further, referring to fig. 1-8, in the present embodiment, when the puncture valve 220 is disposed, the puncture valve 220 includes a valve seat 221, a valve stem 222 and a driving member 223; wherein, the valve seat 221 is connected with the valve body 210; the valve seat 221 is provided with a movable cavity communicated with the corresponding movable channel 212, and the valve rod 222 is movably arranged in the movable cavity; the driving member 223 is used to drive the valve stem 222 to move relative to the valve seat 221 in the direction of the movable passage 212, so that the valve stem 222 pierces the separation wall 214.
Therefore, the valve rod 222 is driven by the driving member 223 to move relative to the valve seat 221, so that the valve rod 222 can move towards the direction of the partition wall 214, and after the partition wall 214 is punctured, the main channel 211 and the movable channel 212 where the puncture valve 220 is located can be communicated with the main channel 211, and the guide channel 213 which is correspondingly communicated with the movable channel 212 is communicated with the main channel 211.
In addition, when the valve stem 222 is provided, in order to make the valve stem 222 pierce the partition wall 214 by the driving action of the driver 223, the valve stem 222 is cylindrical, and one end of the valve stem 222 facing the movable passage 212 is pointed, and the hardness of the pointed end of the valve stem 222 is greater than that of the partition wall 214; in addition, in order to prevent the outer circumferential surface of the valve stem 222 from contacting the partition wall 214 and affecting the communication between the main channel 211 and the movable channel 212 after the valve stem 222 pierces the partition wall 214, a plurality of through holes 224 are formed in the outer circumferential surface of the valve stem 222, and the main channel 211 and the movable channel 212 can be communicated through the through holes 224 by the arrangement of the through holes 224 after the valve stem 222 pierces the partition wall 214.
Further, referring to fig. 1-7, in the present embodiment, the puncture valve 220 further includes a piston 225, the piston 225 is movably disposed in the movable cavity and is connected to the valve stem 222; the piston 225 is used to divide the movable chamber into a first chamber 226 and a second chamber 227; the first chamber 226 is located on a side of the valve seat 221 facing away from the movable passage 212, and the driving member 223 is received in the first chamber 226.
By the arrangement of the piston 225, when the movable cavity is divided, and when the movable channel 212 is communicated with the main channel 211, the fluid entering the movable channel 212 from the main channel 211 is prevented from being limited in the second chamber 227 by the piston 225 after entering the movable cavity, so that the fluid is prevented from leaking through the puncture valve 220. It should be noted that, when the puncture valve 220 is disposed, in order to form a movable cavity and prevent the movable cavity from leaking, the puncture valve 220 may include a sealing member connected to the valve seat 221 for sealing off the movable cavity; it is also possible to use the drive member 223 to close off the movable chamber while it is connected to the valve body 210 and part of it is located in the movable chamber.
When the driver 223 is provided, the present embodiment adopts a manner that the driver 223 includes an electric squib 228, and the electric squib 228 is connected with the valve seat 221 and is used for electrically connecting with an external circuit; the squib 228 is used to generate high pressure gas within the first chamber 226 to drive the movement of the piston 225 and the valve stem 222. It should be noted that the explosive charge of the squib 228 is 60-240mg, which ensures that the generated gas is enough to push the valve stem 222 to move downwards; the working current of the electric detonator 228 is not less than 1.2A, and the explosive force of the explosive filled in the electric detonator 228 is not less than 274 KJ/Kg.
Therefore, when the selector valve 200 works, by connecting the electric explosion tube 228 on the corresponding movable channel 212, after the electric explosion tube 228 is started, high-pressure gas is generated to push the valve rod 222 to move downwards until the valve rod penetrates through the partition wall 214 on the seat of the selector valve 200, at the moment, the main channel 211 is communicated with the movable channel 212, and the fire extinguishing agent in the main channel can be conveyed to the movable channel 212 and enters the flow guide channel 213; when the electric explosion pipes 228 on the plurality of movable channels 212 are started simultaneously, the puncture valves 220 on the plurality of branch paths work simultaneously, the rods of the puncture valves 220 quickly puncture the thin wall, the communication between the plurality of movable channels 212 and the main channel 211 can be quickly realized, and the simultaneous multi-path transmission of the fire extinguishing agent can be realized.
In addition, the puncture valve 220 further comprises an electric detonator 228 mounting seat, an O-ring and an electric detonator 228 short-circuit ring, wherein the electric detonator 228 mounting seat is connected with the movable cavity, the O-ring is located at the connection position of the electric detonator 228 mounting seat and the movable cavity to seal the movable cavity, the O-ring and the piston 225 jointly define a first chamber 226, and the electric detonator 228 short-circuit ring are both connected with the electric detonator 228 mounting seat and located in the first chamber 226. And the O-shaped sealing ring is made of one of ethylene propylene diene monomer or nitrile rubber, and can be well compatible with fire extinguishing agents such as perfluorohexanone, heptafluoropropane and the like at the temperature of-40-70 ℃. It should be noted that in other embodiments of the present invention, the driving member 223 may also be other types of driving structures.
When the puncture valves 220 are installed, the embodiment adopts a mode that the valve seat 221 of each puncture valve 220 is connected with the corresponding movable channel 212, and specifically, the valve seat 221 and each movable channel 212 comprise a first segment and a second segment; the first section is communicated with the second section; while the first section is adapted to be threadedly coupled to a corresponding valve seat 221 and the second section is in communication with a corresponding fluid conducting channel 213. Therefore, in this way, the movable channel 212 includes a portion connected to the corresponding puncture valve 220 and a portion communicated with the flow guide channel 213, so that it is possible to prevent the puncture valve 220 from interfering with the communication between the flow guide channel 213 and the movable channel 212 after being connected to the movable channel 212.
In summary, referring to fig. 1-7, the selector valve 200 has the following advantages:
the selector valve 200 has simple structure and principle, realizes the physical isolation of the main channel 211 and the movable channel 212 through the partition wall 214, and has high working reliability;
when the selector valve 200 works, only 1.2A weak current is needed, the dependence degree on a power supply is extremely low, and passive starting can be basically realized;
the selector valve 200 realizes valve opening through the electric squib 228, and response is rapid;
the selector valve 200 has a plurality of active passages 212 and flow guide passages 213, and each of the active passages 212 and flow guide passages 213 corresponds to one branch for delivering the fire extinguishing agent, so that the selector valve 200 can deliver the fire extinguishing agent to a plurality of branches at the same time, and the fire extinguishing efficiency is high.
Based on the above-mentioned selector valve 200, please refer to fig. 1-7, the present invention further provides a fire fighting system, which includes a main pipe, a plurality of sub-pipes and the above-mentioned selector valve 200; the selector valve 200 is in communication with the main pipe, and the plurality of sub-pipes are in one-to-one communication with the plurality of flow guide passages 213.
In this embodiment, the valve body 210 is provided with a through main channel 211, and two movable channels 212 and two flow guiding channels 213 are provided along the extending direction of the main channel 211; the two flow guide channels 213 are communicated with the two movable channels 212 in a one-to-one correspondence manner, the axes of the movable channels 212 and the flow guide channels 213 are both vertical to the axis of the main channel 211, and the ends of the two flow guide channels 213 and the two movable channels 212 are arranged on different side surfaces of the valve body 210;
a puncture valve 220 is connected to each of the two movable passages 212, a valve seat 221 of the puncture valve 220 extends into the corresponding movable passage 212 and is connected to the movable passage 212, and a valve stem 222 of the puncture valve 220 is adapted to move toward the partition wall 214 to communicate the main passage 211 with the movable passage 212.
When the selector valve 200 is applied to a fire fighting system, the main passage 211 of the valve body 210 is communicated with a main pipe of the fire fighting system, and the plurality of diversion passages 213 are communicated with sub-pipes of the fire fighting system; when the fire fighting system is in an initial stage of operation, the fire extinguishing agent of the fire fighting system can pass through only the main passage 211;
when a fire occurs and the fire extinguishing system is required to extinguish a fire, the sub-pipeline in the fire extinguishing system and the puncture valve 220 corresponding to the sub-pipeline are determined, then the electric explosion tube 228 corresponding to the sub-pipeline is connected, so that the valve rod 222 moves downwards under the action of gas thrust generated by the electric explosion tube 228 until the partition wall 214 blocking the main channel 211 and the movable channel 212 is punctured, at the moment, the main channel 211 is communicated with the movable channel 212, and the flow guide channel 213 is communicated with the main channel 211, therefore, the fire extinguishing agent in the main channel 211 can enter the flow guide channel 213 from the movable channel 212, and can enter the target sub-pipeline to extinguish the fire, and the effect of adjusting the flow path of the fire extinguishing agent is achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A selector valve, comprising:
the valve body is provided with a main channel, a plurality of movable channels and a plurality of flow guide channels, and a partition wall is arranged between each movable channel and the main channel; each movable channel is correspondingly communicated with one flow guide channel;
and the plurality of puncture valves are connected with the valve body, each puncture valve corresponds to one movable channel, and each puncture valve is used for puncturing the partition wall between the corresponding movable channel and the main channel so as to conduct the corresponding movable channel and the main channel, so that the flow guide channel which is conducted with the corresponding movable channel is conducted with the main channel.
2. The selector valve of claim 1, wherein:
the main channel penetrates through the valve body; and the movable channels are sequentially arranged at intervals along the axial direction of the main channel.
3. The selector valve of claim 1, wherein:
the puncture valve comprises a valve seat, a valve rod and a driving piece;
the valve seat is connected with the valve body; the valve seat is provided with a movable cavity communicated with the corresponding movable channel, and the valve rod is movably arranged in the movable cavity;
the driving piece is used for driving the valve rod to move relative to the valve seat towards the direction of the movable channel, so that the valve rod can pierce through the separation wall.
4. The selector valve of claim 3, wherein:
the valve rod is cylindrical, one end, facing the movable channel, of the valve rod is a tip end, and a plurality of conducting holes are formed in the outer peripheral surface of the valve rod.
5. The selector valve of claim 4, wherein:
the tip of the valve stem has a hardness greater than that of the partition wall.
6. The selector valve of claim 3, wherein:
the puncture valve also comprises a piston which is movably arranged in the movable cavity and is connected with the valve rod;
the piston is used for dividing the movable cavity into a first cavity and a second cavity;
the first cavity is located on one side, away from the movable channel, of the valve seat, and the driving piece is contained in the first cavity.
7. The selector valve of claim 6, wherein:
the valve seat of each puncture valve is connected with the corresponding movable channel;
the valve seat and each movable channel comprise a first section and a second section; the first segment is in conduction with the second segment;
the first section is used for being in threaded connection with the corresponding valve seat, and the second section is communicated with the corresponding flow guide channel.
8. The selector valve of claim 6, wherein:
the driving piece comprises an electric detonator, and the electric detonator is connected with the valve seat and is used for being electrically connected with an external circuit;
the electric detonator is used for generating high-pressure gas in the first chamber so as to drive the piston and the valve rod to move.
9. The selector valve according to any one of claims 1 to 8, wherein:
the selector valve also comprises a plurality of connectors, and the ends of the main channel and the flow guide channel, which are positioned on the surface of the valve body, are connected with one connector; the connector is used for being communicated with an external pipeline.
10. A fire fighting system, characterized in that:
the fire fighting system comprising a main pipe, a plurality of sub pipes, and a selector valve according to any one of claims 1-9;
the selection valve is communicated with the main pipe body, and the plurality of sub pipe bodies are communicated with the plurality of flow guide channels in a one-to-one correspondence mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221470370.8U CN217355688U (en) | 2022-06-13 | 2022-06-13 | Selector valve and fire extinguishing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221470370.8U CN217355688U (en) | 2022-06-13 | 2022-06-13 | Selector valve and fire extinguishing system |
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| Publication Number | Publication Date |
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| CN217355688U true CN217355688U (en) | 2022-09-02 |
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| CN202221470370.8U Active CN217355688U (en) | 2022-06-13 | 2022-06-13 | Selector valve and fire extinguishing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405734A (en) * | 2022-10-31 | 2022-11-29 | 山东史达夫工控科技有限公司 | Multi-port connected communication valve for mine fire extinguishing |
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2022
- 2022-06-13 CN CN202221470370.8U patent/CN217355688U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405734A (en) * | 2022-10-31 | 2022-11-29 | 山东史达夫工控科技有限公司 | Multi-port connected communication valve for mine fire extinguishing |
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