CN220489350U - Ventilating device for connecting interlayer hanging holes of underground powerhouse - Google Patents
Ventilating device for connecting interlayer hanging holes of underground powerhouse Download PDFInfo
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- CN220489350U CN220489350U CN202322132319.7U CN202322132319U CN220489350U CN 220489350 U CN220489350 U CN 220489350U CN 202322132319 U CN202322132319 U CN 202322132319U CN 220489350 U CN220489350 U CN 220489350U
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- 239000011229 interlayer Substances 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 127
- 238000009423 ventilation Methods 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims description 12
- 239000010410 layer Substances 0.000 abstract description 50
- 230000008520 organization Effects 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Abstract
The utility model provides a ventilation device for connecting interlayer hanging holes of an underground plant, which comprises an axial flow fan, flexible air pipe connection, an air pipe reducing, a metal air pipe, a flexible air pipe and an air port metal frame; the air port metal frame is arranged below the floor slab hanging hole and is rotatably connected with the floor slab hanging hole; one end of the flexible air pipe is directly connected with the air port metal frame, and the other end of the flexible air pipe is connected with one end of the metal air pipe; the other end of the metal air pipe is connected with one end of the air pipe with variable diameter; the other end of the air pipe with variable diameter is connected with the axial flow fan through the air pipe flexible connection. The ventilation device can meet ventilation requirements between inner layers of an underground factory building and layers on the basis of not changing a civil structure, enhances ventilation airflow organization of each layer in a main factory building, further improves temperature and humidity and airflow parameters in the main factory building, meets requirements of safe operation and personnel operation and maintenance of equipment in the factory building, and can ensure that normal use functions of a floor slab are not affected when a lifting hole is used, so that the field use requirements of engineering are met.
Description
Technical Field
The utility model relates to the technical field of ventilation of underground workshops, in particular to a ventilation device for connecting interlayer hanging holes of an underground workshops.
Background
In the underground main building of a high-earth building with a multi-layer building, particularly in some old pumped storage power stations, the original design scheme does not consider reserving or arranging ventilation channels among layers (such as a generator layer and a bus layer, a bus layer and a water turbine layer, a water turbine layer and a volute layer and a bus gallery, and the like) in advance, but does not consider arranging relay blowers, only using interlayer floor lifting holes to carry out series air supply, taking a blower in a ventilation machine room arranged at the tail end of a ventilation hole as a source blower of the main building, and taking a blower in the ventilation machine room arranged at the tail end of the bus gallery as an exhaust fan of the main building, thereby forming a series air supply system in the form of' outdoor-ventilation hole-main building air supply machine room-main building generator layer-main building bus layer-main building water turbine layer-main building shell-main building volute casing air exhaust. And serial air supply is carried out between layers such as a main plant generator layer, a main plant bus layer, a main plant water turbine layer, a main plant turbine layer and the like through interlayer floor slab hanging holes. However, the space of the factory building is high, different devices are arranged on each layer, a plurality of ventilation resistances exist along the ventilation air flow, the ventilation local resistance of the interlayer object hanging hole area is large, the comprehensive wind pressure of the blower in the main factory building air supply machine room at the tail end of the ventilation hole and the comprehensive wind pressure of the exhaust fan in the main factory building at the tail end of the bus gallery and the bus gallery exhaust machine room are difficult to meet the operation requirements of the ventilation system of the whole main factory building and the bus gallery, and the ventilation effect between the inner layers of the main factory building and the layers and the whole ventilation system is not ideal.
Because the underground powerhouse operates for many years, the influences of comprehensive factors such as outdoor environmental parameters, electromechanical equipment heating, fan aging and the like lead to the fact that the temperature and humidity and air flow parameters of all layers in the main powerhouse are difficult to meet the operating requirements of the powerhouse, the air supply quantity among all layers such as a generator layer, a bus layer, a water turbine layer, a volute layer and the like of the main powerhouse are difficult to meet the design requirements through on-site actual measurement in a certain pumped storage power station, the non-ideal condition of the ventilation effect greatly influences the temperature and humidity of all layers in the main powerhouse, and therefore the ventilation system is required to be optimized and improved, and the air supply resistance among all layers in the main powerhouse is required to be overcome by adopting a proper method. At present, in an underground main plant of a newly-built underground pumped storage power station, air supply pipes are embedded in side walls of all layers of the main plant, and an air feeder is additionally arranged at the tail end of each air supply pipe, so that the effect of air supply connection is achieved for air supply of all layers of the main plant. For the main building of the established old power station, if no ventilating duct is reserved before, the side wall is generally of a concrete structure, the condition of adding the ventilating duct in the later period is not provided, each floor slab is thicker, the ventilating holes are larger, and if the ventilating holes are drilled in the floor slab position, the floor slab structure can be influenced. Under the existing conditions, optimizing and perfecting the ventilation system on the basis of not changing the civil structure is very important. Therefore, it is necessary to design a ventilation device for connecting the interlayer hanging holes of the underground plant to optimize and perfect the ventilation air flow organization of each layer in the main plant, so as to improve the temperature and humidity and air flow parameters in the main plant and meet the requirements of safe operation and personnel operation and maintenance of equipment in the plant.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model provides the ventilation device for connecting the interlayer hanging holes of the underground factory building, which not only can meet the ventilation requirement between the inner layers of the underground factory building on the basis of not changing the civil structure, but also can ensure that the normal use function of the hanging holes on the floor slab is not influenced when the hanging holes are used, thereby meeting the field use requirement of engineering.
The technical scheme adopted by the utility model is as follows:
the utility model provides a ventilation device for connecting interlayer hanging holes of an underground plant, which comprises an axial flow fan (1), a flexible air pipe connection (2), an air pipe reducing (3), a metal air pipe (4), a flexible air pipe (5) and an air port metal frame (6);
the air port metal frame (6) is arranged below the floor slab hanging hole and is rotatably connected with the floor slab hanging hole; one end of the flexible air pipe (5) is directly connected with the air port metal frame (6), and the other end of the flexible air pipe is connected with one end of the metal air pipe (4); the other end of the metal air pipe (4) is connected with one end of the air pipe reducing (3); the other end of the air pipe reducing (3) is connected with the axial flow fan (1) through the air pipe flexible connection (2).
Preferably, a sealing gasket (7) is arranged between the tuyere metal frame (6) and the floor slab hanging hole.
Preferably, the section size of the tuyere metal frame (6) is not smaller than the section size of the floor slab hanging hole, and the section size of the sealing gasket (7) is kept equal to the section size of the tuyere metal frame (6).
Preferably, a rotating device (8) is arranged at the outer side of the floor slab hanging hole, and one side of the tuyere metal frame (6) is rotatably connected with the rotating device (8); the four corners of the tuyere metal frame (6) are provided with buckles (10).
Preferably, the section of the metal air pipe (4) is rectangular.
Preferably, a supporting frame is arranged in the flexible air pipe (5); the support frame comprises a metal frame (12) and a telescopic metal frame (11);
the telescopic metal frames (11) are used for connecting the metal frames (12), and four corners of each metal frame (12) are correspondingly connected to form a telescopic structure.
The ventilation device for connecting the interlayer hanging holes of the underground powerhouse has the following advantages:
the ventilation device can meet ventilation requirements between inner layers of an underground factory building and layers on the basis of not changing a civil structure, enhances ventilation airflow organization of each layer in a main factory building, further improves temperature and humidity and airflow parameters in the main factory building, meets requirements of safe operation and personnel operation and maintenance of equipment in the factory building, and can ensure that normal use functions of a floor slab are not affected when a lifting hole is used, so that the field use requirements of engineering are met.
Drawings
FIG. 1 is a schematic diagram of the main structure of a ventilation device for connecting interlayer hanging holes of an underground powerhouse according to the present utility model;
FIG. 2 is a schematic view of a telescopic support frame for an air duct of the ventilating device for connecting a lifting hole between layers of an underground plant;
fig. 3 is an assembled state view of the ventilating device for connecting the inter-floor hanging holes of the underground powerhouse according to the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model relates to a ventilation device for connecting interlayer hanging holes of an underground factory building, which is shown in figures 1-3, and comprises an axial flow fan 1, a flexible air pipe connection 2, an air pipe reducing 3, a metal air pipe 4, a flexible air pipe 5 and an air port metal frame 6; the air port metal frame 6 is arranged below the floor slab hanging hole and is rotatably connected with the floor slab hanging hole; one end of the flexible air pipe 5 is directly connected with the air port metal frame 6, and the other end is connected with one end of the metal air pipe 4; the other end of the metal air pipe 4 is connected with one end of the air pipe reducing 3; the other end of the air pipe reducing 3 is connected with the axial flow fan 1 through an air pipe flexible connection 2.
And a sealing gasket 7 is arranged between the tuyere metal frame 6 and the floor slab hanging hole. Wherein, the cross section size of the tuyere metal frame 6 should be not smaller than the cross section size of the floor slab hanging hole, the sealing gasket 7 is arranged between the tuyere metal frame 6 and the floor slab hanging hole, and the cross section size thereof should be kept equal to the cross section size of the tuyere metal frame 6.
A rotating device 8 is arranged at the outer side of the floor slab hanging hole, and one side of the tuyere metal frame 6 is rotatably connected with the rotating device 8; the four corners of the tuyere metal frame 6 are provided with buckles 10. Specifically, the rotating device 8 is fixed under the floor slab, is arranged at the edge of the hanging hole, does not prevent the hanging hole from being used normally, one side of the air port metal frame 6 is connected with the rotating device 8, and the air port direction can rotate flexibly.
The metal air pipe 4 is hoisted under the floor slab, the section of the metal air pipe is rectangular, the section size is determined according to the air quantity and the air speed, the air quantity is obtained by considering the heat extraction requirement and the ventilation frequency requirement, and the air speed in the air pipe is controlled to be 6-14m/s.
The length of the flexible air pipe 5 can meet the rotatable range of the air port metal frame 6, and the length of the metal air pipe 4 can be determined according to the arrangement position and the airflow organization characteristics of the axial flow fan 1.
The section size of the air pipe flexible connection 2 is equal to the section size of the air suction inlet of the axial flow fan 1; the cross-sectional dimension of one end of the air duct reducing 3 is equal to the cross-sectional dimension of the metal air duct 4, and the cross-sectional dimension of the other end is equal to the cross-sectional dimension of the air duct flexible connection 2.
A supporting frame is arranged in the flexible air pipe 5; the support frame comprises a metal frame 12 and a telescopic metal frame 11; the metal frames 12 are arranged in parallel front and back, the telescopic metal frames 11 are used for connecting the metal frames 12, and four corners of each metal frame 12 are correspondingly connected to form a telescopic structure. Specifically, the cross section of the metal frame 12 is rectangular, and the shape of the cross section of the metal frame is kept the same as that of the metal air pipe 4; the telescopic metal frame 11 is used for connecting the metal frames 12, and correspondingly connects the four corners of each metal frame 12, and can be telescopic at any time to form a support frame of the flexible air duct 5.
One end of the flexible air pipe is provided with an air port metal frame, the other end of the flexible air pipe is directly connected with the metal air pipe, and the telescopic metal frame and the metal frame are built into a support frame of the flexible air pipe, so that the functions of supporting, fixing and keeping the form of the flexible air pipe are achieved. The air port metal frame is connected with the floor slab hanging hole, and a sealing gasket is arranged between the floor slab hanging hole and the air port metal frame, so that the effect of no air leakage is achieved. The rotating device is fixed below the floor slab and connected with the air port metal frame, so that the function of flexibly rotating the air port direction can be achieved. Some built pumped storage power stations do not have the condition of arranging interlayer ventilating pipelines and relay fans between the inner layers of the underground main power plants, so that the ventilation effect of the whole ventilation system is not ideal. The ventilation device can meet ventilation requirements between inner layers of an underground factory building and layers on the basis of not changing a civil structure, enhances ventilation airflow organization of each layer in a main factory building, further improves temperature and humidity and airflow parameters in the main factory building, meets requirements of safe operation and personnel operation and maintenance of equipment in the factory building, and can ensure that normal use functions of a floor slab are not affected when a lifting hole is used, so that the field use requirements of engineering are met.
One specific embodiment is described below with reference to the accompanying drawings:
as shown in fig. 1-3, a ventilation device for connecting interlayer hanging holes of an underground powerhouse according to the present utility model includes a main body structure: the air duct variable-diameter type air conditioner comprises an axial flow fan 1, an air duct flexible connection 2, an air duct variable-diameter 3, a metal air duct 4, a flexible air duct 5 and an air port metal frame 6; auxiliary device: the sealing gasket 7, the rotating device 8, the metal frame 12, the telescopic metal frame 11, the fixed circular ring 9, the hook 13 and the buckle 10.
One end of the flexible air pipe 5 is directly connected with the air port metal frame 6, the other end of the flexible air pipe is connected with the metal air pipe 4, and the air pipe reducing 3 and the air pipe flexible connection 2 are used for connecting the metal air pipe 4 and the axial flow fan 1 to form a main body structure of the ventilation device.
The axial flow fan 1 is hoisted under the floor slab.
The fixed circular ring 9 is welded on the tuyere metal frame 6, the metal frame 12 and the metal air pipe 4 respectively; the hooks 13 are welded on the metal frame 12; the buckle 10 is welded on the tuyere metal frame 6, and the welding positions of the fixed ring 9, the hook 13 and the buckle 10 need to ensure that all devices can be connected smoothly.
The metal frame 12 and the telescopic metal frame 11 form a supporting frame of the flexible air duct 5, and play roles in supporting, fixing and keeping the shape of the flexible air duct.
The hooks 13 are connected with the fixed ring 9 on the metal air pipe 4 and are defined as a first group of hooks and fixed rings; the hooks 13 are connected with the fixed ring 9 on the tuyere metal frame 6 and are defined as a second group of hooks and fixed rings; the hooks 13 are connected with the fixing ring 9 on the metal frame 12, and are defined as a third group of hooks and fixing rings.
Preferably, the length of the flexible air pipe 5 is required to meet the rotatable range of the tuyere metal frame 6, and the length of the metal air pipe 4 can be determined according to the arrangement position and the airflow organization characteristics of the axial flow fan 1.
Preferably, the section size of the tuyere metal frame 6 should be not smaller than the section size of the floor slab hanging hole; the sealing gasket 7 is arranged between the air port metal frame 6 and the floor slab hanging hole, the section size of the sealing gasket is equal to that of the air port metal frame 6, the flexible air pipe is ensured to be in sealing connection with the hanging hole, and the effect of no air leakage is achieved.
Preferably, the rotating device 8 is fixed under the floor slab, is arranged at the edge of the hanging hole, does not prevent the hanging hole from being used normally, and one side of the tuyere metal frame 6 is connected with the rotating device 8, so that the function of flexibly rotating the tuyere direction can be realized.
Preferably, the section of the metal air pipe 4 is rectangular, the section size is determined according to the air quantity and the air speed, the air quantity is obtained by considering the heat removal requirement and the ventilation frequency requirement, and the air speed in the air pipe is controlled to be 6-14m/s; the metal air pipe 4 is hoisted under the floor slab.
Preferably, the cross section size of the air pipe flexible connection 2 should be kept equal to the cross section size of the air suction inlet of the axial flow fan 1; the cross-sectional dimension of one end of the air duct variable diameter 3 is equal to the cross-sectional dimension of the metal air duct 4, and the cross-sectional dimension of the other end of the air duct variable diameter is equal to the cross-sectional dimension of the air duct flexible connection 2.
Preferably, the cross section of the metal frame 12 is rectangular, and the cross section shape of the metal frame is kept the same as that of the metal air pipe 4; the telescopic metal frame 11 is used for connecting the metal frames 12, and correspondingly connects the four corners of each metal frame 12, so that the telescopic effect can be achieved at any time, the support frame of the flexible air duct 5 is formed, and the functions of supporting and shaping are achieved.
The use and operation of the present utility model are described in detail below:
in some built pumped storage power stations, the air flow organization of each layer in the underground main power plant is not ideal, and when the conditions of arranging interlayer ventilating ducts and relay fans are not arranged between the layers, the ventilating device for connecting the interlayer hanging holes of the underground power plant can be utilized, so that the ventilating air flow organization of each layer in the main power plant is enhanced, the temperature and humidity and air flow parameters in the main power plant are improved, and the requirements of safe operation and personnel operation and maintenance of equipment in the power plant are met.
The following is the assembly and using method of the ventilation device:
according to the size of the ventilation device and the position of the fixing device, the fixing ring 9 is welded on the tuyere metal frame 6, the metal frame 12 and the metal air pipe 4 respectively; the hooks 13 are welded on the metal frame 12; the buckle 10 is welded on the tuyere metal frame 6, and each welding position needs to ensure that each device can be connected correspondingly smoothly.
One end of a flexible air pipe 5 is directly connected with an air port metal frame 6, the other end of the flexible air pipe is connected with a metal air pipe 4, an air pipe reducing 3 is connected with an air pipe flexible connection 2, the other end of the air pipe reducing 3 is connected with the metal air pipe 4, and the other end of the air pipe flexible connection 2 is connected with an axial flow fan 1. The metal air pipe 4 and the axial flow fan 1 are hoisted under the floor slab.
The metal frame 12 is connected with the telescopic metal frame 11 to form a support frame of the flexible air pipe 5, the support frame is sleeved outside the flexible air pipe 5, the first group of hooks and the fixed circular ring are fixedly connected, the support frame is stretched, the second group of hooks and the fixed circular ring are fixedly connected, and finally the third group of hooks and the fixed circular ring are fixedly connected.
The rotating device 8 is fixed under the floor slab and arranged at the edge of the hanging hole, and one side of the tuyere metal frame 6 is fixed on the rotating device 8. The sealing washer 7 is arranged between the tuyere metal frame 6 and the floor slab hanging hole, and the buckle 10 is fixed below the floor slab. The ventilation device is assembled, and the axial flow fan can be operated and used after being started.
The following is the disassembly method of the ventilation device when the floor slab hanging hole is used, and the reuse method of the ventilation device after the floor slab hanging hole is used:
this ventilation unit uses according to above-mentioned assembled mode, should the power station operation and maintenance period need use the floor to hang the thing hole, need dismantle the air pipe who hangs thing hole below this moment, open buckle 10 from the floor below, rotate wind gap metal frame 6 around rotary device 8 to hang thing hole one side, can not shelter from hanging the thing hole, can not produce the interference to hanging the normal use in thing hole. After the hanging hole is used, the tuyere metal frame 6 rotates around the rotating device 8 below the hanging hole, the buckle 10 is fixed below the floor slab, the ventilating device can be restored to a reuse state, and the whole ventilating device of the axial flow fan can be opened to be in an operation working condition.
The beneficial effects of the utility model are as follows:
(1) In the high-rise underground factory building with multi-layer buildings, if multi-layer serial air supply is carried out only by using the hanging holes between layers, ventilation channels are not reserved or arranged in advance, the ventilation device is arranged on the hanging holes of the floor, the ventilation local resistance of the hanging holes can be overcome, the condition of insufficient pressure of a large-space source fan is improved, the effect of ventilation connection is achieved, the ventilation effect between the layers is directly enhanced, and therefore the ventilation airflow organization of the whole factory building is improved.
(2) This ventilation unit, the tuber pipe comprises flexible tuber pipe and metal tuber pipe two parts, and flexible tuber pipe can realize nimble crooked function, and the metal tuber pipe can reach tuber pipe design and stable air current's effect, and the hanging hole on the floor is connected to tuber pipe one end, and the other end links to each other with the fan, and whole set of device is obviously adorned in the floor below, under the prerequisite of not adjusting wall body and floor structure, realizes the ventilation between layer and the layer, both safe and reliable in the operation in-process, nimble convenient again.
(3) This ventilation unit simple to operate can dismantle in a flexible way, is in at floor hoist hole site installation running state at ordinary times, when using hoist hole, with the rotatory folding of wind gap, does not influence hoist the original function of using in thing hole, hangs the thing hole and uses afterwards, and is fixed with the wind gap upset, resumes ventilation state to can satisfy normal fortune dimension needs in the factory building, can satisfy the ventilation demand between different layers and the layer in the factory building again.
The above-described embodiments are only for illustrating the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the content of the present utility model and to implement it accordingly, and the scope of the present utility model is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present utility model are still within the scope of the present utility model.
Claims (6)
1. The ventilation device for connecting the interlayer hanging hole of the underground plant is characterized by comprising an axial flow fan (1), a flexible air pipe connection (2), an air pipe reducing (3), a metal air pipe (4), a flexible air pipe (5) and an air port metal frame (6);
the air port metal frame (6) is arranged below the floor slab hanging hole and is rotatably connected with the floor slab hanging hole; one end of the flexible air pipe (5) is directly connected with the air port metal frame (6), and the other end of the flexible air pipe is connected with one end of the metal air pipe (4); the other end of the metal air pipe (4) is connected with one end of the air pipe reducing (3); the other end of the air pipe reducing (3) is connected with the axial flow fan (1) through the air pipe flexible connection (2).
2. Ventilation device for connecting inter-floor lifting holes of underground works according to claim 1, characterized in that a sealing gasket (7) is installed between the tuyere metal frame (6) and the floor lifting holes.
3. The ventilation device for connecting an inter-floor suspended matter hole of an underground powerhouse according to claim 2, characterized in that the cross-sectional dimension of the tuyere metal frame (6) is not smaller than the cross-sectional dimension of the floor suspended matter hole, and the cross-sectional dimension of the sealing gasket (7) is kept equal to the cross-sectional dimension of the tuyere metal frame (6).
4. The ventilation device for connecting interlayer hanging holes of underground powerhouse according to claim 1, characterized in that a rotating device (8) is installed outside the floor hanging holes, one side of the tuyere metal frame (6) is rotatably connected with the rotating device (8); the four corners of the tuyere metal frame (6) are provided with buckles (10).
5. A ventilation device for connecting inter-floor lifting holes of an underground powerhouse according to claim 1, characterized in that the cross section of the metal air duct (4) is rectangular.
6. The ventilation device for connecting inter-floor hanging holes of an underground powerhouse according to claim 1, characterized in that a supporting frame is arranged inside the flexible air pipe (5); the support frame comprises a metal frame (12) and a telescopic metal frame (11);
the metal frames (12) are arranged in parallel front and back, and the telescopic metal frames (11) are used for connecting
Connecting each metal frame (12), correspondingly connecting four corners of each metal frame (12),
forming a telescopic structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322132319.7U CN220489350U (en) | 2023-08-09 | 2023-08-09 | Ventilating device for connecting interlayer hanging holes of underground powerhouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322132319.7U CN220489350U (en) | 2023-08-09 | 2023-08-09 | Ventilating device for connecting interlayer hanging holes of underground powerhouse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220489350U true CN220489350U (en) | 2024-02-13 |
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ID=89829522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322132319.7U Active CN220489350U (en) | 2023-08-09 | 2023-08-09 | Ventilating device for connecting interlayer hanging holes of underground powerhouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220489350U (en) |
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2023
- 2023-08-09 CN CN202322132319.7U patent/CN220489350U/en active Active
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