CN216125116U - Pipe network type multi-nozzle fire extinguishing device - Google Patents
Pipe network type multi-nozzle fire extinguishing device Download PDFInfo
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- CN216125116U CN216125116U CN202121594006.8U CN202121594006U CN216125116U CN 216125116 U CN216125116 U CN 216125116U CN 202121594006 U CN202121594006 U CN 202121594006U CN 216125116 U CN216125116 U CN 216125116U
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Abstract
The utility model discloses a pipe network type multi-nozzle fire extinguishing device, which comprises a tank body, wherein the tank body is of an integrally formed structure, the lower part of the tank body is provided with an installation support, the installation support comprises a concave bottom plate and a protection plate, the protection plate and the side edge of the concave bottom plate are obliquely arranged, the right side of the concave bottom plate is also provided with a fixing plate, fixing holes are respectively formed in the fixing plate and the concave bottom plate, the tank body and the installation support are also provided with a fastening device, the right side of the tank body is also connected with a powder adding pipe, the left side of the powder adding pipe is provided with an annular clamping groove, a gas producing agent assembly is also connected and arranged in the annular clamping groove, the gas producing agent assembly comprises a gas producing agent box body, a starter arranged in the gas producing agent box body and an installation boss arranged at the end part of the gas producing agent box body, the structure improves the stability of installation and fixation, the buffering and shock absorption effects, and realizes the fire extinguishing effect by adopting a plurality of starting modes, the multi-point prevention and control all-round covering effect is realized, and the practicability and the efficiency of the equipment are further improved.
Description
Technical Field
The utility model belongs to the technical field of fire extinguishing protection, and particularly relates to a pipe network type multi-nozzle fire extinguishing device.
Background
Traditional extinguishing device all is single installation site, its installation location all needs certain fixity, but traditional extinguishing device is because the rigidity of itself, its coverage area is limited, to the conflagration prevention and control of large-scale server equipment, electronic passenger car railway carriage, regulator cubicle, it is not enough far away to set up single extinguishing device, but install extinguishing device at too many conflagration prevention and control points and need great economic cost and the maintenance cost in later stage, must cause the heavy burden of industrial and mining enterprises, for this reason, we need a pipe network formula multinozzle extinguishing device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pipe network type multi-nozzle fire extinguishing device to solve the existing problems, the structure is reasonable in design, the stability of installation and fixation is improved, the buffering and shock absorption effects are improved, the tank body is prevented from being damaged due to vibration, the fire extinguishing agent is convenient to disassemble and add, the fire extinguishing effect is realized by adopting a plurality of starting modes, the multi-point prevention and control all-round covering effect is realized through an adapter and a spray pipe, the use cost is reduced, and the practicability and the high efficiency of the device are further improved.
The technical scheme adopted by the utility model is as follows:
a pipe network type multi-nozzle fire extinguishing device comprises a tank body, wherein the tank body is of an integrally formed structure, a mounting support is arranged at the lower part of the tank body, the mounting support comprises a concave bottom plate and protection plates arranged on two sides of the concave bottom plate, the protection plates and the sides of the concave bottom plate are obliquely arranged, a fixing plate is further arranged on the right side of the concave bottom plate, fixing holes are formed in the fixing plate and the concave bottom plate, a fastening device is further arranged on the tank body and the mounting support, a powder adding pipe is further connected and arranged on the right side of the tank body, an annular clamping groove is formed in the left side of the powder adding pipe, a gas generating agent component is further connected and arranged in the annular clamping groove, the gas generating agent component comprises a gas generating agent box body, a starter arranged in the gas generating agent box body and a mounting boss arranged at the end part of the gas generating agent box body, the installation boss is installed in a matching manner with the annular clamping groove, the upper end of the gas production agent box body is provided with a gas outlet and a pressure valve arranged at the gas outlet, a powder adding port plug is installed in the powder adding pipe through threaded connection, a sealing gasket is further arranged between the powder adding port plug and the powder adding pipe, a through hole is further formed in the center of the powder adding port plug, a safety valve is arranged at the position of the through hole, the right side of the powder adding pipe is further provided with a protective cover and a connecting piece which is installed on the protective cover in a connecting manner, a detector for detecting a fire signal is further installed in the connecting piece in a connecting manner, the left side of the tank body is further provided with a jet pipe, the left side of the jet pipe is further provided with a connecting pipe through threaded connection of a jet nut, a diaphragm is further arranged at the connecting gap between the connecting pipe and the jet pipe, and the left end of the connecting pipe is further connected with at least two jet pipes through an adapter, and the output end of the injection pipe is also provided with a powder splashing disc.
Preferably, the inclination angle of the protection plate and the concave bottom plate is 0-30 degrees, and the protection plate is kept in contact with the surface of the tank body.
Further preferably, a cushion rubber pad is further arranged between the protection plate and the tank body.
Preferably, the fastening device comprises an annular fixing band fixedly mounted on the mounting bracket, engaging lugs arranged at two end portions of the annular fixing band, and a fastening bolt and a fastening nut for connecting and fixing the two engaging lugs, and the annular fixing band is of an open structure.
Further preferably, the fastening devices are M which are symmetrically and uniformly distributed, and M is more than or equal to 2.
Preferably, the detector is a temperature sensing line, and the temperature sensing line penetrates through the connecting piece and is electrically connected with the starter.
Preferably, the detector is a fire detector, and the fire detector is electrically connected with the starter in the gas generating agent assembly.
Preferably, sealing gaskets are arranged at the connecting gap between the nozzle nut and the gas ejector pipe and the connecting gap between the nozzle nut and the connecting pipe.
Preferably, an electromagnetic control valve is further arranged in the injection pipe, and the electromagnetic control valve corresponds to the corresponding detector one by one and is installed in a matching mode.
Further preferably, the adapter connected with the injection pipe is any one of a three-way pipe joint, a four-way pipe joint and a five-way pipe joint, and the adapter is respectively connected with the connecting pipe and the injection pipe through threads.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. according to the utility model, the integrally formed tank body is arranged, so that a good sealing effect is ensured, the mounting support is arranged at the lower part of the tank body, stable equipment mounting is realized through the concave bottom plate and the fixing plate, the tank body is further mounted and fixed through the arrangement of the fastening device, a good buffering and damping effect is realized through the arrangement of the protection plate distributed in a special structure and the buffer rubber pad arranged between the protection plate and the tank body, the tank body damage caused by bumping of equipment in the moving process is avoided, and the use safety of the tank body is further ensured;
2. according to the utility model, the powder adding pipe and the gas generating agent assembly are arranged, the structural design is ingenious, the space utilization rate is improved, the gas generating agent box body and the powder adding pipe are fixedly connected through the mounting boss and the annular clamping groove, the powder adding pipe is connected with the tank body through threads and is sealed by the sealing washer, the disassembly and the assembly are convenient, the gas generating agent box body and the dry powder extinguishing agent are convenient to replace, the purpose of long-term use is achieved, the cost is saved, the gas generating agent box body is provided with the gas outlet and the pressure valve, when the gas generating agent triggers to generate high-pressure gas instantly, the set value of the pressure valve is reached, the pressure valve is opened, the gas generating agent is sprayed out, the gas generating agent is prevented from leaking out and the safety is ensured by arranging the pressure valve in a non-use state, the gas generating agent is prevented from leaking out and is ensured by arranging the powder adding port plug, the through hole and the safety valve in the powder adding pipe, the sealing performance after the dry powder extinguishing agent is added is ensured, and the safety cover is also arranged, The connecting piece and the detector find and detect fire signals through the detector, and realize the high efficiency of fire extinguishing through a temperature sensing line starting mode or a fire detector electric starting mode, thereby further improving the service life and the use value of the equipment;
3. in the utility model, the mixed injection of the fire extinguishing agent and the gas generating agent is realized through the gas ejector pipe arranged on the tank body, the connecting pipe in threaded connection with the nozzle nut is arranged on the left side of the gas ejector pipe, the adjustment and the installation and the positioning are convenient, the sealing performance of the tank body is realized through the membrane arranged at the connecting gap between the connecting pipe and the gas ejector pipe, the dry powder fire extinguishing agent is prevented from leaking, meanwhile, when the gas generating agent reaches a certain pressure, the output fire extinguishing of the fire extinguishing agent is realized by breaking through the membrane, the membrane adopts an aluminum membrane, the pipe network can be connected with a plurality of branch pipes to be connected with the jet pipe through the arrangement of the connecting pipe, the adapter, at least one jet pipe and the powder splashing disk, the powder splashing disk is arranged at the end part of the jet pipe, the dry powder fire extinguishing agent is uniformly scattered into a protected area by the powder splashing disk to realize effective fire extinguishing, the pipe network type installation is not limited by the area, the installation can be installed where a space exists, and the fire extinguishing agent is conveyed to a place where a fire easily occurs through the pipe network, the use cost is saved, and the coverage area is increased;
4. according to the utility model, monitoring of fire prevention and control points is realized through temperature sensing lines or fire detectors, at the moment, a pipe network type structure is formed due to more injection pipelines, a single injection pipe is correspondingly provided with an electromagnetic control valve and a detector, then when the temperature sensing line or the fire detector of any fire prevention and control point senses a fire signal, the corresponding detector triggers the signal to a starter in a gas generating agent box body, the gas generating agent triggers to instantly generate high-pressure gas to be injected out of the box body to drive a dry powder extinguishing agent to move to an output end, further when the pressure of the box body reaches a bearing value of a diaphragm, the mixed extinguishing agent breaks through the diaphragm to operate on the injection pipe of the corresponding fire signal prevention and control point, and the electromagnetic control valve in the corresponding injection pipe is started at the same time, so that fixed-point fire extinguishing operation is realized, and the efficiency and the intelligent degree of the fire extinguishing operation are improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a view taken along line A-A of FIG. 2;
fig. 4 is an enlarged view of the structure of the portion B in fig. 3.
The labels in the figure are: 1-tank body, 2-mounting bracket, 201-concave bottom plate, 202-protection plate, 203-fixing plate, 204-fixing hole, 3-fastening device, 301-annular fixing band, 302-connecting lug, 303-fastening bolt, 304-fastening nut, 4-powder adding pipe, 401-annular clamping groove, 5-gas generating agent component, 501-gas generating agent box body, 502-starter, 503-mounting boss, 504-gas outlet, 505-pressure valve, 6-powder adding port plug, 7-sealing gasket, 8-through hole, 801-safety valve, 9-protective cover, 10-connecting piece, 11-detector, 111-temperature sensing line, 112-fire detector, 12-gas injection pipe, 13-nozzle nut, 14-connecting pipe, 15-diaphragm, 16-adapter, 17-spraying pipe, 18-powder splashing disc, 19-buffer rubber pad and 20-electromagnetic control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
Example 1: as shown in connection with fig. 1-4;
a pipe network type multi-nozzle fire extinguishing device comprises a tank body 1, wherein the tank body 1 is of an integrally formed structure, a mounting bracket 2 is arranged at the lower part of the tank body 1, the mounting bracket 2 comprises a concave bottom plate 201 and protection plates 202 arranged at two sides of the concave bottom plate 201, the protection plates 202 and the sides of the concave bottom plate 201 are obliquely arranged, the inclination angles of the protection plates 202 and the concave bottom plate 201 are 0-30 degrees, the protection plates 202 are kept in surface contact with the tank body 1, a buffer rubber pad 19 is also arranged between the protection plates 202 and the tank body 1, a fixing plate 203 is also arranged at the right side of the concave bottom plate 201, fixing holes 204 are respectively formed in the fixing plate 203 and the concave bottom plate 201, fastening devices 3 are also arranged on the tank body 1 and the mounting bracket 2, each fastening device 3 comprises an annular fixing belt 301 fixedly arranged on the mounting bracket 2, connecting lugs 302 arranged at two ends of the annular fixing belt 301, and fastening bolts 303 and fastening nuts 304 for connecting and fixing the two connecting lugs 302, and annular fixed band 301 is open structure, it is M of symmetry and evenly distributed to set up device 3, M is more than or equal to 2, through setting up the jar body of integrated into one piece, good sealed effect has been guaranteed, and then set up the installing support in jar body lower part, realize stable equipment fixing through concave type bottom plate and fixed plate, it is fixed to have further realized the installation to the jar body through setting up the device of setting up, and through setting up the guard plate that special structure distributes and the cushion rubber pad that sets up between guard plate and the jar body, good buffering shock attenuation effect has been realized, the jar body damage that the equipment jolted in the removal process and caused has been avoided, the security of jar body use has further been guaranteed.
The right side of the tank body 1 is also connected and provided with a powder adding pipe 4, the left side in the powder adding pipe 4 is provided with an annular clamping groove 401, the annular clamping groove 401 is also connected and provided with a gas generating agent component 5, the gas generating agent component 5 comprises a gas generating agent box body 501, a starter 502 arranged in the gas generating agent box body 501 and an installation boss 503 arranged at the end part of the gas generating agent box body 501, the installation boss 503 is matched and installed with the annular clamping groove 401, the upper end of the gas generating agent box body 501 is provided with a gas outlet 504 and a pressure valve 505 arranged at the gas outlet 504, a powder adding port plug 6 is also installed in the powder adding pipe 4 through threaded connection, a sealing gasket 7 is also arranged between the powder adding port plug 6 and the powder adding pipe 4, the center of the powder adding port plug 6 is also provided with a through hole 8, the through hole 8 is provided with a safety valve 801, the right side of the powder adding pipe 4 is also connected and provided with a protective cover 9 and a connecting piece 10 connected and installed on the protective cover 9, the connecting member 10 is further connected with a detector 11 for detecting a fire signal, the detector 11 is a temperature sensing line 111, and the temperature sensing line 111 penetrates through the connecting member 10 and is electrically connected with the starter 502.
The powder adding pipe and the gas generating agent component are arranged, the structural design is ingenious, the space utilization rate is improved, the gas generating agent box body and the powder adding pipe are fixedly connected through the mounting boss and the annular clamping groove, the powder adding pipe is connected with the tank body through threads and is sealed by the sealing washer, the disassembly and the assembly are convenient, the gas generating agent box body and the dry powder extinguishing agent are convenient to replace, the long-term use is realized, the cost is saved, the gas generating agent box body is provided with the gas outlet and the pressure valve, when the gas generating agent triggers to generate high-pressure gas instantly, the set value of the pressure valve is reached, the pressure valve is opened, the gas generating agent is sprayed out, the gas generating agent is prevented from leaking out and the safety is ensured by arranging the pressure valve in a non-use state, the sealing performance after the dry powder extinguishing agent is added is ensured by arranging the powder adding port plug, the through hole and the safety valve in the powder adding pipe, and the protective cover, the connecting piece and the detector are arranged at the same time, the fire signal is detected through the detector discovery, and the high efficiency of putting out a fire is realized through the mode that the temperature sensing line starts or the fire detector electricity starts, has further improved the life and the use value of this equipment.
The left side of the tank body 1 is also connected with and provided with an air injection pipe 12, the left side of the air injection pipe 12 is also connected with and provided with a connecting pipe 14 through a nozzle nut 13, a diaphragm 15 is arranged at the connecting gap between the connecting pipe 14 and the gas ejector pipe 12, the left end of the connecting pipe 14 is also connected with at least two injection pipes 17 through a joint 16, electromagnetic control valves 20 are also arranged in the injection pipes 17, and the electromagnetic control valves 20 are correspondingly and matchingly arranged with the corresponding detectors 11 one by one, the adapter 16 connected with the injection pipe 17 is any one of a three-way pipe joint, a four-way pipe joint and a five-way pipe joint, the adapter 16 is respectively connected with the connecting pipe 14 and the injection pipe 17 through threads, the output end of the injection pipe 17 is also provided with a powder splashing disc 18, sealing gaskets 7 are arranged at the connecting gap between the nozzle nut 13 and the gas ejector pipe 12 and the connecting gap between the nozzle nut 13 and the connecting pipe 14.
The mixed injection of the fire extinguishing agent and the gas generating agent is realized through the gas ejector pipe arranged on the tank body, the connecting pipe in threaded connection with the nozzle nut is arranged on the left side of the gas ejector pipe, the adjustment and the installation and the positioning are convenient, the sealing performance of the tank body is realized through the membrane arranged at the connecting gap between the connecting pipe and the gas ejector pipe, the dry powder fire extinguishing agent is prevented from leaking, meanwhile, when the gas generating agent reaches a certain pressure, the membrane is broken through to realize the output fire extinguishing of the fire extinguishing agent, the membrane adopts an aluminum membrane, the pipe network can be connected with a plurality of branch pipes to be connected with the spray pipes through the arrangement of the connecting pipe, the adapter, at least one spray pipe and the powder splashing disc, the powder splashing disc is arranged at the end part of the spray pipe, the dry powder fire extinguishing agent is uniformly scattered into a protected area through the powder splashing disc to realize effective fire extinguishing, the pipe network type installation is not limited by the area, the installation can be installed where space exists, the fire extinguishing agent is conveyed to a place where a fire easily occurs through the pipe network, the use cost is saved, and the coverage area is increased.
In the using state, firstly, the monitoring of fire prevention and control points is realized through temperature sensing lines, at the moment, as more injection pipelines form a pipe network type structure, a single injection pipe is correspondingly provided with a corresponding electromagnetic control valve and a corresponding detector, then when the temperature sensing line of any fire prevention and control point senses a fire signal, the corresponding detector triggers the signal to a starter in a gas generating agent box body, the gas generating agent triggers to instantly generate high-pressure gas to spray the box body, the dry powder fire extinguishing agent is driven to move to an output end, further, when the pressure of the box body reaches a bearing value of a diaphragm, the mixed fire extinguishing agent breaks through the operation of the diaphragm to the injection pipe of the corresponding fire signal prevention and control point, and the electromagnetic control valve in the corresponding injection pipe is started at the same time, the fixed-point fire extinguishing operation is realized, and the efficiency and the intelligent degree of the fire extinguishing operation are improved.
Example 2: as shown in connection with fig. 1-4;
the structure of the technical solution of this embodiment is substantially similar to that of embodiment 1, and the difference is that: the detector 11 is a fire detector 112 and the fire detector 112 is electrically connected to an initiator 502 in the gas generant assembly 5.
The method comprises the steps of firstly, monitoring fire prevention and control points through fire detectors, wherein at the moment, a pipe network type structure is formed by a plurality of injection pipelines, corresponding electromagnetic control valves and detectors are arranged on a single injection pipe, then, after the fire detectors at any fire prevention and control point sense fire signals, the corresponding fire detectors trigger the signals to a starter in a gas generating agent box body, the gas generating agent triggers to instantly generate high-pressure gas to spray the box body, the dry powder fire extinguishing agent is driven to move to an output end, then, when the pressure of a tank body reaches a bearing value of a diaphragm, the mixed fire extinguishing agent breaks through the operation of the diaphragm to the injection pipe at the corresponding fire signal prevention and control point, and the electromagnetic control valves in the corresponding injection pipes are started at the same time, so that the fixed-point fire extinguishing operation is realized, and the efficiency and the intelligent degree of the fire extinguishing operation are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A pipe network type multi-nozzle fire extinguishing device is characterized in that: the gas generating tank comprises a tank body (1), wherein the tank body (1) is of an integrally formed structure, a mounting support (2) is arranged on the lower portion of the tank body (1), the mounting support (2) comprises a concave bottom plate (201) and protection plates (202) arranged on two sides of the concave bottom plate (201), the protection plates (202) and the sides of the concave bottom plate (201) are obliquely arranged, a fixing plate (203) is further arranged on the right side of the concave bottom plate (201), fixing holes (204) are formed in the fixing plate (203) and the concave bottom plate (201), a fastening device (3) is further mounted on the tank body (1) and the mounting support (2), a powder adding pipe (4) is further connected and mounted on the right side of the tank body (1), an annular clamping groove (401) is formed in the left side of the powder adding pipe (4), and a gas generating agent component (5) is further connected and mounted in the annular clamping groove (401), the gas generating agent component (5) comprises a gas generating agent box body (501), a starter (502) arranged in the gas generating agent box body (501) and an installation boss (503) arranged at the end part of the gas generating agent box body (501), the installation boss (503) is matched with the annular clamping groove (401) for installation, the upper end of the gas generating agent box body (501) is provided with an air outlet (504) and a pressure valve (505) arranged at the air outlet (504), a powder adding port plug (6) is further installed in the powder adding pipe (4) through threaded connection, a sealing gasket (7) is further arranged between the powder adding port plug (6) and the powder adding pipe (4), a through hole (8) is further formed in the center of the powder adding port plug (6), a safety valve (801) is arranged at the position of the through hole (8), a protection cover (9) is further installed on the right side of the powder adding pipe (4) in a connecting mode, and a connecting piece (10) arranged on the protection cover (9) is connected, still connect in connecting piece (10) and install detector (11) that are used for surveying fire signal the jar body (1) left side is still connected and is installed fumarole (12), fumarole (12) left side still installs connecting pipe (14) through spout nut (13) threaded connection, just connecting pipe (14) with the joint gap department of fumarole (12) still is provided with diaphragm (15), the left end of connecting pipe (14) still is connected with injection pipe (17) for two at least through adapter (16), just the output of injection pipe (17) still is provided with spatters powder dish (18).
2. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 1, wherein: the inclination angle of the protection plate (202) and the concave bottom plate (201) is 0-30 degrees, and the protection plate (202) is kept in surface contact with the tank body (1).
3. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 2, wherein: a buffer rubber pad (19) is also arranged between the protection plate (202) and the tank body (1).
4. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 1, wherein: the fastening device (3) comprises an annular fixing band (301) fixedly mounted on the mounting bracket (2), connecting lugs (302) arranged at two end parts of the annular fixing band (301), and a fastening bolt (303) and a fastening nut (304) for connecting and fixing the two connecting lugs (302), and the annular fixing band (301) is of an open structure.
5. A pipe-network type multiple nozzle fire suppression apparatus as claimed in claim 4, wherein: the fastening devices (3) are M symmetrically and uniformly distributed, and M is more than or equal to 2.
6. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 1, wherein: the detector (11) is a temperature sensing line (111), and the temperature sensing line (111) penetrates through the connecting piece (10) to be electrically connected with the starter (502).
7. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 1, wherein: the detector (11) is a fire detector (112), and the fire detector (112) is electrically connected with an initiator (502) in the gas generating agent assembly (5).
8. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 1, wherein: and sealing gaskets (7) are arranged at the connecting gap between the nozzle nut (13) and the gas ejector pipe (12) and the connecting gap between the nozzle nut (13) and the connecting pipe (14).
9. A pipe-network type multiple sprinkler fire suppression apparatus according to claim 1, wherein: an electromagnetic control valve (20) is further arranged in the injection pipe (17), and the electromagnetic control valves (20) correspond to the corresponding detectors (11) one by one and are installed in a matched mode.
10. A pipe-network type multiple nozzle fire suppression apparatus as claimed in claim 9, wherein: with adapter (16) that injection pipe (17) link to each other is any kind of tee bend coupling, cross coupling, five-way pipe coupling, just adapter (16) respectively with connecting pipe (14) injection pipe (17) all are through threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121594006.8U CN216125116U (en) | 2021-07-13 | 2021-07-13 | Pipe network type multi-nozzle fire extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121594006.8U CN216125116U (en) | 2021-07-13 | 2021-07-13 | Pipe network type multi-nozzle fire extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216125116U true CN216125116U (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121594006.8U Active CN216125116U (en) | 2021-07-13 | 2021-07-13 | Pipe network type multi-nozzle fire extinguishing device |
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| Country | Link |
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| CN (1) | CN216125116U (en) |
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2021
- 2021-07-13 CN CN202121594006.8U patent/CN216125116U/en active Active
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