CN113586827A - Pipeline connecting device for fire hydrant - Google Patents
Pipeline connecting device for fire hydrant Download PDFInfo
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- CN113586827A CN113586827A CN202110843004.6A CN202110843004A CN113586827A CN 113586827 A CN113586827 A CN 113586827A CN 202110843004 A CN202110843004 A CN 202110843004A CN 113586827 A CN113586827 A CN 113586827A
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- plate
- fixedly connected
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a pipeline connecting device for a fire hydrant, which comprises a connecting shell, wherein one side of the connecting shell is fixedly connected with a fixed shell, one side of the connecting shell, which is far away from the fixed shell, is fixedly connected with an installation shell, one side of the fixed shell, which is far away from the connecting shell, is uniformly connected with a reinforcing rod, one end, which is close to the fixed shell, of the reinforcing rod is provided with a convex thread, the inner side of the fixed shell is provided with an annular groove, the position, which is far away from the connecting shell, of the inner wall of the installation shell is fixedly connected with a stabilizing device, a clamping device is installed inside the stabilizing device, the inner wall of the annular groove is provided with a buffering device, one end, which is far away from the convex thread, of the reinforcing rod is symmetrically provided with an extrusion block, and one side, which is far away from the reinforcing rod, is fixedly connected with an arc-shaped rubber plate. This pipeline connecting device for fire hydrant has further reached the purpose of fixed fire pipeline and fire hose, has guaranteed pipeline connecting device's practicality.
Description
Technical Field
The invention relates to the technical field of fire fighting, in particular to a pipeline connecting device for a fire hydrant.
Background
A fire hydrant, called fire hydrant formally, is a fixed fire-fighting equipment, and mainly has the functions of controlling combustible substances, isolating combustion-supporting substances and eliminating ignition sources. The fire-fighting system comprises an outdoor fire hydrant system, an indoor fire hydrant system and a fire extinguisher system, and also comprises an automatic spraying system, a water cannon system, a gas fire extinguishing system, a fire detection system, a water mist system and the like. The fire hydrant mainly supplies the fire engine to get water from municipal administration water supply pipe network or outdoor fire control water supply pipe network and put out a fire, also can the lug connection hosepipe, the squirt goes out water and puts out a fire, so, indoor outer fire hydrant system also is one of the important fire control facilities who puts out a fire, the use of pipeline is very extensive, mainly used in water supply, drainage, heat supply, supply gas, long distance transport oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices, in the fire engineering construction process, need use the fire control pipeline and carry the water source.
For example, chinese patent CN108980489B proposes a pipe connection device for fire hydrant, which includes a first pipe, one side of the first pipe is connected with a flange through a screw thread, one side of the flange far away from the first pipe is connected with a second pipe through a screw thread, the surfaces of the first pipe and the second pipe near one end of the flange are both fixedly connected with a connection block, one end of the connection block is provided with a through hole, the inside of the through hole is movably connected with a positioning screw rod, and both ends of the positioning screw rod are both movably connected with elastic gaskets. This based on pipe connection device for fire hydrant, location lead screw can be further fixed first pipeline and second pipeline, and elastic gasket has improved the stability between the component, and the dead lever can be fixed the fixed block, reaches the purpose of fixed fire pipeline, has improved the steadiness of connecting between the component, avoids causing the not hard up problem of connection between the pipeline because of the fire pipeline screw thread damages, has guaranteed pipe connection device's practicality.
The device can't realize carrying out the purpose that convenient and fast connects to the fire control pipeline to the fixed purpose in fire hydrant area when connecting to fire hydrant pipeline, can't realize reducing connection efficiency, and the device single structure can't cushion the impact force that the pipeline produced when the installation, can't prevent to connect not hard up problem between the pipeline.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a pipeline connecting device for a fire hydrant, which solves the problem that the device cannot fix a fire hydrant pipe when connecting the fire hydrant pipe, realizes the purpose of conveniently and quickly connecting the fire hydrant pipe, is stable in structural connection, buffers and lightens the impact force when the pipe is installed, avoids the condition that the outside of the fire hydrant pipe is damaged due to the installation of a connecting piece, and effectively prevents the problem of loose connection between the pipes.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a pipeline connecting device for a fire hydrant comprises a connecting shell, wherein one side of the connecting shell is fixedly connected with a fixed shell, the side of the connecting shell far away from the fixed shell is fixedly connected with an installation shell, the position of one side of the fixed shell far away from the connecting shell is uniformly connected with reinforcing rods, one end of the reinforcing rod close to the fixed shell is provided with a convex thread, the inner side of the fixed shell is provided with an annular groove, a fixing device is fixedly connected to the inner wall of the mounting shell at a position far away from the connecting shell, a clamping device is arranged in the fixing device, the inner wall of the annular groove is provided with a buffer device, one end of the reinforcing rod far away from the convex thread is symmetrically provided with extrusion blocks, one side fixedly connected with arc rubber slab that the anchor strut is kept away from to the extrusion piece has realized carrying out the purpose of convenient and fast connection to the fire-fighting pipeline, and this structural connection is stable, long service life.
Preferably, the fixing device comprises a device frame, the inner wall fixedly connected with elastic ball of the device frame, the inside sliding connection of the device frame has the elastic hollow ball, the internally mounted of the elastic hollow ball has the extrusion gasbag, the position of the inside of the elastic hollow ball, which is close to the extrusion gasbag, runs through the elastic plate, an arc limiting plate is symmetrically mounted on one side of the elastic plate, the position of the inside of the elastic hollow ball, which is far away from the extrusion gasbag, is mounted with the extrusion ball, the effect of fixing the connected fire hose is achieved, and the stability of connection between components is improved.
Preferably, one side fixedly connected with stripper plate that the arc limiting plate is close to the elastic plate, one side of stripper plate runs through the arc limiting plate and is connected with the arc expansion plate, one side and the arc limiting plate fixed connection of arc expansion plate.
Preferably, a device opening is uniformly formed in one side of the device frame, an arc plate is connected to one side of the device frame in a sliding mode at a position close to the device opening, and a curved elastic plate is fixedly connected to one side, far away from the device frame, of the arc plate.
Preferably, the clamping device comprises a clamping frame, one side of the clamping frame penetrates through a curved elastic plate, the inner wall of the clamping frame is connected with a sliding plate in a sliding mode, one side of the sliding plate is fixedly connected with a limiting block, the limiting block is close to one side of the sliding plate and is fixedly connected with a spring, one end of the spring, far away from the limiting block, is fixedly connected with the clamping frame, one side of the sliding plate, far away from the limiting block, is fixedly connected with a rubber arc plate, the purpose of fixing a fire pipeline and a fire hose is further achieved, and the practicability of the pipeline connecting device is guaranteed.
Preferably, buffer includes the buffering frame, one side fixedly connected with fixed plate of buffering frame, fixed plate and ring channel fixed connection, one side sliding connection of buffering frame has the elasticity piece, one side fixedly connected with bottom plate that the fixed plate was kept away from to the buffering frame, the arc wall has been seted up to one side of bottom plate, the position fixedly connected with elasticity fixture block that one side of buffering frame is close to the arc wall can play the purpose of protection fire hydrant, good reliability.
Preferably, one side fixedly connected with elasticity gasbag that the arc wall was kept away from to the bottom plate, one side fixedly connected with extrusion stem of elasticity gasbag, the one end that elasticity gasbag was kept away from to the extrusion stem is connected with the buffering frame, and the impact force when buffering and having alleviateed the installation pipeline has avoided effectively having prevented to connect the not hard up problem because of the condition that the erection joint spare leads to the outside damage that causes of fire control pipeline.
(III) advantageous effects
The invention provides a pipeline connecting device for a fire hydrant. The method has the following beneficial effects:
(one), this kind of fire hydrant is with pipe connection device, through the installation of securing device, utilize the extrusion gasbag to receive the extrusion force volume increase that expands rapidly for the elastic plate promotes the extrusion ball and hugs closely the fire hose, extrudees the bending with the elastic plate simultaneously, has reached and has carried out the effect of fixing to the fire hose of connecting, has improved the steadiness of connecting between the component.
(II), this pipeline connecting device for fire hydrant, through the installation of clamping device, utilize the tension of bent shape elastic plate to make the sliding plate slide down along the clamping frame, promote the tight fire hose of rubber arc plate clamp, further reached the purpose of fixed fire pipeline and fire hose, guaranteed pipeline connecting device's practicality.
(III), this pipe connection device for fire hydrant, through buffer's installation, utilize elastic airbag to receive the extrusion force and promote the buffering frame and produce and rock for the elasticity piece receives the extrusion and slides along buffering frame, and elasticity fixture block atress constantly blocks into in the arc wall, and the impact force when buffering and having alleviateed the installation pipeline avoids leading to the outside condition that causes the damage of fire control pipeline because of erection joint spare, has effectively prevented to connect not hard up problem between the pipeline.
(IV), this pipeline connecting device for fire hydrant, through the installation of arc rubber slab and anchor strut, realized carrying out the purpose that convenient and fast connects to the fire-fighting pipeline, this structural connection is stable, long service life.
(V), this pipeline connecting device for fire hydrant can play the purpose of protection fire hydrant, helps to connect firmly, and its connection is convenient, and the structure closely closes, satisfies the needs of connecting, and it is little to drag the power simultaneously, and the good reliability.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a structural cross-sectional view of an annular groove of the present invention;
FIG. 3 is a schematic view of the structure of the stabilization device of the present invention;
FIG. 4 is a schematic view of the construction of the compression plate of the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 3 at A according to the present invention;
FIG. 6 is a schematic view of a buffer device according to the present invention;
FIG. 7 is a schematic view of the construction of the extrusion block of the present invention.
In the figure: 1 connecting shell, 2 fixed shell, 3 installation shell, 4 reinforcing rods, 5 convex threads, 6 annular grooves, 7 stabilizing devices, 71 device frames, 72 elastic balls, 73 elastic hollow balls, 74 extrusion air bags, 75 elastic plates, 76 arc limiting plates, 77 extrusion balls, 8 clamping devices, 81 clamping frames, 82 sliding plates, 83 limiting blocks, 84 springs, 85 rubber arc plates, 9 buffer devices, 91 buffer frames, 92 fixing plates, 93 elastic blocks, 94 bottom plates, 95 arc grooves, 96 elastic clamping blocks, 97 elastic air bags, 98 extrusion rods, 10 extrusion blocks, 11 arc rubber plates, 12 extrusion plates, 13 arc expansion plates, 14 device ports, 15 arc plates and 16 curved elastic plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a pipe connection device for fire hydrant, includes connecting shell (1), its characterized in that: connect one side fixedly connected with set casing (2) of shell (1), one side fixedly connected with installation shell (3) of set casing (2) are kept away from in connection shell (1), the position that connection shell (1) was kept away from in one side of set casing (2) evenly is connected with anchor strut (4), the one end that anchor strut (4) are close to set casing (2) is provided with convex thread (5), ring channel (6) have been seted up to the inboard of set casing (2), the position fixedly connected with securing device (7) of connection shell (1) are kept away from to the inner wall of installation shell (3).
Securing device (7) is including device frame (71), inner wall fixedly connected with elastic ball (72) of device frame (71), the inside sliding connection of device frame (71) has elastic hollow ball (73), the internally mounted of elastic hollow ball (73) has extrusion gasbag (74), the position that the inside of elastic hollow ball (73) is close to extrusion gasbag (74) runs through has elastic plate (75), arc limiting plate (76) are installed to one side symmetry of elastic plate (75), extrusion gasbag (74) is kept away from to the inside of elastic hollow ball (73) position installs extrusion ball (77).
Arc limiting plate (76) are close to one side fixedly connected with stripper plate (12) of elastic plate (75), one side of stripper plate (12) is run through arc limiting plate (76) and is connected with arc expansion plate (13), one side and arc limiting plate (76) fixed connection of arc expansion plate (13).
When the fire hydrant fixing device is used, the fixing shell (2) is fixed on a water outlet pipe of the fire hydrant by rotating the reinforcing rod (4), the fire hose is installed into the connecting shell (1) from one side of the installing shell (3), at the moment, the fire hose touches the stabilizing device (7), the device frame (71) is extruded to enable the extrusion air bag (74) inside the elastic hollow ball (73) to be rapidly expanded in volume by extrusion force, the elastic plate (75) is pushed to the outside of the elastic hollow ball (73) by the expanded extrusion air bag (74), the extrusion ball (77) is extruded to be in contact with the device frame (71) and tightly attached to the fire hose, the arc limiting plate (76) is stressed to extrude the fire hose while the elastic plate (75) is extruded and bent by the extrusion air bag, the volume is rapidly expanded by the extrusion force of the extrusion air bag by the installation of the stabilizing device, so that the extrusion ball is pushed to be tightly attached to the fire hose by the elastic plate, simultaneously with the elastic plate extrusion bending, reached and carried out fixed effect to the fire hose of connecting, improved the steadiness of connecting between the component.
Example two
Referring to fig. 1-5, the present invention provides a technical solution: on the basis of the first embodiment, a clamping device (8) is installed inside the fixing device (7), a device opening (14) is uniformly formed in one side of the device frame (71), an arc-shaped plate (15) is connected to one side of the device frame (71) close to the device opening (14) in a sliding mode, and a curved elastic plate (16) is fixedly connected to one side, far away from the device frame (71), of the arc-shaped plate (15).
The clamping device (8) comprises a clamping and fixing frame (81), a curved elastic plate (16) penetrates through one side of the clamping and fixing frame (81), a sliding plate (82) is connected to the inner wall of the clamping and fixing frame (81) in a sliding mode, a limiting block (83) is fixedly connected to one side of the sliding plate (82), a spring (84) is fixedly connected to one side, close to the sliding plate (82), of the limiting block (83), one end, far away from the limiting block (83), of the spring (84) is fixedly connected with the clamping and fixing frame (81), and a rubber arc plate (85) is fixedly connected to one side, far away from the limiting block (83), of the sliding plate (82).
During the use, contact bent shape elastic plate (16) when fire hose connects, bent shape elastic plate (16) are promoted arc (15) by the extrusion and are slided along the inner wall of device frame (71), bent shape elastic plate (16) atress expandes and drive sliding plate (82) and slide along pressing from both sides solid frame (81) this moment, rubber arc board (85) are released and are contacted with fire hose when sliding plate (82) slide, installation through clamping device, the tension that utilizes bent shape elastic plate makes the sliding plate slide along clamping frame, it presss from both sides tight fire hose to promote rubber arc board, the purpose of fixed fire pipeline and fire hose has further been reached, pipeline connecting device's practicality has been guaranteed.
EXAMPLE III
Referring to fig. 1-7, the present invention provides a technical solution: on the basis of the second embodiment, buffer device (9) are installed to the inner wall of ring channel (6), extrusion piece (10) are installed to the one end symmetry that reinforcing rod (4) kept away from convex thread (5), one side fixedly connected with arc rubber slab (11) of reinforcing rod (4) are kept away from in extrusion piece (10).
Buffer (9) are including buffering frame (91), one side fixedly connected with fixed plate (92) of buffering frame (91), fixed plate (92) and ring channel (6) fixed connection, one side sliding connection of buffering frame (91) has elasticity piece (93), one side fixedly connected with bottom plate (94) of fixed plate (92) are kept away from in buffering frame (91), arc wall (95) have been seted up to one side of bottom plate (94), the position fixed connection elasticity fixture block (96) that one side of buffering frame (91) is close to arc wall (95).
One side that arc wall (95) was kept away from in bottom plate (94) is fixedly connected with elasticity gasbag (97), one side fixedly connected with extrusion stem (98) of elasticity gasbag (97), the one end that elasticity gasbag (97) were kept away from in extrusion stem (98) is connected with buffering frame (91).
During the use, advance set casing (2) with fire pipeline installation, buffering frame (91) is touched to the pipeline outer wall, extrude bottom plate (94) to buffering frame (91) one side, elastic air bag (97) receive extrusion force promotion extrusion pole (98) and drive elastic block (93) of buffering frame (91) one side and slide this moment, elastic fixture block 96 receives the continuous card of thrust of buffering frame (91) and goes into arc wall (95), installation through buffer, utilize elastic air bag to receive the extrusion force and promote buffering frame and produce and rock, make elastic block receive the extrusion and slide along buffering frame, the continuous card of elastic fixture block atress goes into in the arc wall, the impact force when buffering and having alleviateed the installation pipeline, avoid leading to the outside condition that causes the damage of fire pipeline because of the erection joint spare, effectively prevented to connect not hard up the problem between the pipeline.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising" is used to specify the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof, but does not exclude the presence of other similar features, integers, steps, operations, components, or groups thereof.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a pipe connection device for fire hydrant, includes connecting shell (1), its characterized in that: one side of the connecting shell (1) is fixedly connected with a fixed shell (2), one side of the connecting shell (1) far away from the fixed shell (2) is fixedly connected with an installation shell (3), reinforcing rods (4) are uniformly connected at the positions, far away from the connecting shell (1), of one side of the fixed shell (2), one end of the reinforcing rod (4) close to the fixed shell (2) is provided with a convex thread (5), an annular groove (6) is arranged on the inner side of the fixed shell (2), a stabilizing device (7) is fixedly connected to the position, far away from the connecting shell (1), of the inner wall of the mounting shell (3), a clamping device (8) is arranged in the stabilizing device (7), a buffer device (9) is arranged on the inner wall of the annular groove (6), one end of the reinforcing rod (4) far away from the convex thread (5) is symmetrically provided with extrusion blocks (10), one side of the extrusion block (10) far away from the reinforcing rod (4) is fixedly connected with an arc-shaped rubber plate (11).
2. A pipe connecting device for a hydrant in accordance with claim 1, wherein: securing device (7) is including device frame (71), inner wall fixedly connected with elastic ball (72) of device frame (71), the inside sliding connection of device frame (71) has elastic hollow ball (73), the internally mounted of elastic hollow ball (73) has extrusion gasbag (74), the position that the inside of elastic hollow ball (73) is close to extrusion gasbag (74) runs through has elastic plate (75), arc limiting plate (76) are installed to one side symmetry of elastic plate (75), extrusion gasbag (74) is kept away from to the inside of elastic hollow ball (73) position installs extrusion ball (77).
3. A pipe connecting device for a hydrant in accordance with claim 2, wherein: arc limiting plate (76) are close to one side fixedly connected with stripper plate (12) of elastic plate (75), one side of stripper plate (12) is run through arc limiting plate (76) and is connected with arc expansion plate (13), one side and arc limiting plate (76) fixed connection of arc expansion plate (13).
4. A pipe connecting device for a hydrant in accordance with claim 2, wherein: device mouth (14) have evenly been seted up to one side of device frame (71), the position sliding connection that one side of device frame (71) is close to device mouth (14) has arc (15), one side fixedly connected with curved elastic plate (16) that device frame (71) was kept away from in arc (15).
5. A pipe connecting device for a hydrant in accordance with claim 4, wherein: the clamping device (8) comprises a clamping and fixing frame (81), a curved elastic plate (16) penetrates through one side of the clamping and fixing frame (81), a sliding plate (82) is connected to the inner wall of the clamping and fixing frame (81) in a sliding mode, a limiting block (83) is fixedly connected to one side of the sliding plate (82), a spring (84) is fixedly connected to one side, close to the sliding plate (82), of the limiting block (83), one end, far away from the limiting block (83), of the spring (84) is fixedly connected with the clamping and fixing frame (81), and a rubber arc plate (85) is fixedly connected to one side, far away from the limiting block (83), of the sliding plate (82).
6. A pipe connecting device for a hydrant in accordance with claim 1, wherein: buffer (9) are including buffering frame (91), one side fixedly connected with fixed plate (92) of buffering frame (91), fixed plate (92) and ring channel (6) fixed connection, one side sliding connection of buffering frame (91) has elasticity piece (93), one side fixedly connected with bottom plate (94) of fixed plate (92) are kept away from in buffering frame (91), arc wall (95) have been seted up to one side of bottom plate (94), the position fixed connection elasticity fixture block (96) that one side of buffering frame (91) is close to arc wall (95).
7. A pipe connecting device for a hydrant in accordance with claim 6, wherein: one side that arc wall (95) was kept away from in bottom plate (94) is fixedly connected with elasticity gasbag (97), one side fixedly connected with extrusion stem (98) of elasticity gasbag (97), the one end that elasticity gasbag (97) were kept away from in extrusion stem (98) is connected with buffering frame (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843004.6A CN113586827A (en) | 2021-07-26 | 2021-07-26 | Pipeline connecting device for fire hydrant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843004.6A CN113586827A (en) | 2021-07-26 | 2021-07-26 | Pipeline connecting device for fire hydrant |
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| Publication Number | Publication Date |
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| CN113586827A true CN113586827A (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110843004.6A Pending CN113586827A (en) | 2021-07-26 | 2021-07-26 | Pipeline connecting device for fire hydrant |
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| CN (1) | CN113586827A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211976227U (en) * | 2020-04-27 | 2020-11-20 | 山东新科建工消防工程有限公司 | Fire hydrant convenient to connect |
| CN112833266A (en) * | 2019-11-25 | 2021-05-25 | 璧靛己 | Pipeline connecting device for pipeline engineering |
| CN213394042U (en) * | 2020-05-20 | 2021-06-08 | 青岛华腾消防集团有限公司 | Fire hose convenient to connect |
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2021
- 2021-07-26 CN CN202110843004.6A patent/CN113586827A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833266A (en) * | 2019-11-25 | 2021-05-25 | 璧靛己 | Pipeline connecting device for pipeline engineering |
| CN211976227U (en) * | 2020-04-27 | 2020-11-20 | 山东新科建工消防工程有限公司 | Fire hydrant convenient to connect |
| CN213394042U (en) * | 2020-05-20 | 2021-06-08 | 青岛华腾消防集团有限公司 | Fire hose convenient to connect |
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| 中华人民共和国国家质量监督检验检疫总局: "《GB12514.1-2005 消防接口》", 1 April 2006 * |
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Application publication date: 20211102 |
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