CN110878977B - Stage frame with air circulation - Google Patents

Stage frame with air circulation Download PDF

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Publication number
CN110878977B
CN110878977B CN201911126812.XA CN201911126812A CN110878977B CN 110878977 B CN110878977 B CN 110878977B CN 201911126812 A CN201911126812 A CN 201911126812A CN 110878977 B CN110878977 B CN 110878977B
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CN
China
Prior art keywords
air
fixing frame
channel
exhaust fan
extending
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Active
Application number
CN201911126812.XA
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Chinese (zh)
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CN110878977A (en
Inventor
杨全明
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Hangzhou Youbang Performing Arts Equipment Co ltd
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Hangzhou Youbang Performing Arts Equipment Co ltd
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Priority to CN201911126812.XA priority Critical patent/CN110878977B/en
Publication of CN110878977A publication Critical patent/CN110878977A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00Ventilation
    • F24F7/007Ventilation with forced flow
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H3/00Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
    • E04H3/10Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons for meetings, entertainments, or sports
    • E04H3/22Theatres; Concert halls; Studios for broadcasting, cinematography, television or similar purposes
    • E04H3/24Constructional features of stages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/32Supports for air-conditioning, air-humidification or ventilation units

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ventilation (AREA)

Abstract

The invention provides a stage frame with air circulation, which relates to the technical field of theatre equipment and comprises a fixing frame and an extension column, wherein the extension column is provided with a central shaft hole, a rotating rod and a driving machine for driving the rotating rod to rotate are arranged on the fixing frame, at least one part of the rotating rod is positioned in the central shaft hole, a first channel and a second channel are arranged on the extension column, a first exhaust fan is arranged in the first channel, a second exhaust fan is arranged in the second channel, the directions of the first exhaust fan and the second exhaust fan are opposite, and an air guide protrusion is arranged on one side, close to the extension column, of the fixing frame. The stage frame with the air circulation is simple in structure, convenient to install and maintain, can be directly installed on the existing air duct of a theatre, can be installed by punching at present, and has a good air supply effect.

Description

Stage frame with air circulation
Technical Field
The invention relates to the technical field of theatre equipment,
In particular, the invention relates to a stage frame with air circulation.
Background
With the continuous development of Chinese economy in recent years, the average income of the whole society is gradually increased, the cultural life demands of people are gradually increased, the development of cultural matters in China is promoted, various theatrical buildings such as theatres, conference halls, television rebroadcasting audience halls and the like are newly built all over the country, the requirements of people on stage effects in performance activities are higher and higher, and various modern large-scale playing places and the like are provided, so that the performance art has unusual special effects, various stage mechanical equipment is arranged, and the effects of drawing eyes and refreshing are played in theatrical stage performance.
However, many auditoriums and the volleyball under the auditoriums need larger space, people in the theatres need better ventilation environment during performance, but many old theatres are provided, the air supply device installed in the past is insufficient in air supply capacity, or the air supply channel cannot be maintained due to aging, or the maintenance cost is extremely high, and during stage performance, particularly, the closed stage, the stage background, the stage bottom, the stage partition and other spaces need to be subjected to air circulation, the places are closed narrowly, and irreversible damage can be caused to the staff due to air accumulation for too long.
In a word, the following problems can appear, and the air supply pipeline can't be installed again after the theatre stage frame is built, and the air supply pipeline secondary installation is very troublesome, can't install additional on old theatre building, and the maintenance is very complicated after the air supply pipeline ageing, can't improve on current wind channel, and the air supply capacity optimization is not enough, can't install on current building yet.
Therefore, in order to solve the above problems, it is necessary to design a reasonable stage rack with air circulation.
Disclosure of Invention
The invention aims to provide the stage frame with air circulation, which has the advantages of simple structure, convenient installation and convenient maintenance, can be directly installed on the existing air duct of a theatre, can be installed by punching at present, and has good air supply effect.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
The utility model provides a take air cycle's stage frame, includes the mount and stretches out the post, stretch out the post and be provided with the central shaft hole, be provided with the dwang on the mount and be used for the drive dwang pivoted actuating mechanism, the dwang has at least a part to be located in the central shaft hole, stretch out and be provided with first passageway and second passageway on the post, be provided with first air exhauster in the first passageway, be provided with the second air exhauster in the second passageway, first air exhauster with the orientation of second air exhauster is opposite, the mount is close to stretch out one side of post and be provided with the wind-guiding arch.
Preferably, the fixing legs for fixing the fixing frame are arranged at the edge of the fixing frame.
Preferably, the fixing leg is provided with a fixing bolt for fixing the fixing leg.
Preferably, the fixing leg is extended in a direction approaching the protruding column.
In the present invention, the end of the fixing frame is preferably provided with a dust screen extending in the direction of the protruding column.
Preferably, the number of the protruding columns is at least one.
Preferably, the rotating rod is provided with a limiting block for limiting the position of the extending column.
Preferably, the number of the limiting blocks is at least two.
As the preferable mode of the invention, a movable blade is arranged on a limiting block of one end of the rotating rod, which is far away from the fixed frame.
Preferably, the number of the first exhaust fan and the second exhaust fan is at least one.
Preferably, the number of the first channels and the number of the second channels are at least one.
Preferably, at least a part of the wind guiding protrusion is arc-shaped.
The stage frame with air circulation has the beneficial effects that: simple structure, convenient installation, convenient maintenance can directly install on the current wind channel of theatre, also can punch now and install, and the air supply is effectual.
Drawings
FIG. 1 is a schematic view of a stage rack with air circulation according to an embodiment of the present invention;
FIG. 2 is a schematic view of another embodiment of a stage rack with air circulation according to the present invention;
FIG. 3 is a schematic cross-sectional view of an extension column of one embodiment of a stage rack with air circulation in accordance with the present invention;
FIG. 4 is a schematic cross-sectional view of an extension column of another embodiment of a stage rack with air circulation in accordance with the present invention;
In the figure: 1. the device comprises a fixed frame, 11, a rotating rod, 111, a limiting block, 112, movable blades, 12, a driving machine, 13, wind guiding bulges, 14, fixed feet, 15, a dust screen, 2, an extending column, 21, a central shaft hole, 22, a first channel, 221, a first exhaust fan, 23, a second channel, 231 and a second exhaust fan.
Detailed Description
The invention is further described below with reference to the drawings and examples.
With the continuous development of China's economy in recent years, the average income of the whole society is gradually increased, the cultural life demands of people are gradually increased, the development of China's cultural career is promoted, various theatre-property buildings such as cinema, conference halls, television broadcasting auditoriums and the like are newly built all over the country, a large amount of space is needed for a plurality of auditoriums and the practice hall below the auditoriums, structural frame posts cannot extend to the floor slab of the auditoriums, therefore, the floor of the auditoriums needs to be designed into a large-span prestress hollow sloping plate, and a large number of seat ventilation holes need to be reserved under seats on the floor slab. Therefore, the floor board and the wall board of the theatre cannot be additionally provided with the air supply pipeline after being built, the air supply pipeline is very troublesome in secondary installation, cannot be additionally arranged on an old theatre building, is very complex in maintenance after the air supply pipeline is aged, cannot be improved on the existing air duct, has insufficient air supply capacity optimization, and cannot be installed on the existing building.
Embodiment one: as shown in fig. 1 and 3, the stage rack with air circulation comprises a fixed frame 1 and an extending column 2, wherein the extending column 2 is provided with a central shaft hole 21, a rotating rod 11 and a driving machine 12 for driving the rotating rod 11 to rotate are arranged on the fixed frame 1, at least a part of the rotating rod 11 is positioned in the central shaft hole 21, a first channel 22 and a second channel 23 are arranged on the extending column 2, a first exhaust fan 221 is arranged in the first channel 22, a second exhaust fan 231 is arranged in the second channel 23, the first exhaust fan 221 and the second exhaust fan 231 face opposite to each other, and an air guide protrusion 13 is arranged on one side, close to the extending column 2, of the fixed frame 1.
In the invention, the extending column 2 is connected to the fixing frame 1, the rotating rod 11 on the fixing frame 1 extends into the central shaft hole 21 of the extending column 2, the driving machine 12 arranged on the fixing frame 1 drives the rotating rod 11 to rotate around the axis of the rotating rod 11, so as to drive the extending column 2 to rotate around the axis of the extending column 2, the first channel 22 and the second channel 23 on the extending column 2 are respectively provided with a first exhaust fan 221 and a second exhaust fan 231 with opposite directions, when the first exhaust fan 221 and the second exhaust fan 231 are opened, one air is blown in a direction away from the fixing frame 1, one air is blown in a direction close to the fixing frame 1, air on one side away from the fixing frame 1 is extracted and then fresh air is injected, and the air on one side of the fixing frame 1 close to the extending column 2 is provided with an air guide protrusion 13, so that the air in the first channel 22 and the second channel 23 can smoothly circulate, in the existing air duct or other pipelines of a theatre building, namely, when the extending column 2 is opened from the outside to the pipelines, one air is blown in the end of the extending column 2, and then the air can circulate through the walls of the theatre, and the air can be circulated on the two sides of the extending column 2.
Firstly, the structure of the extending column 2 is that a first channel 22 and a second channel 23 are arranged on the extending column 2, a first exhaust fan 221 is arranged in the first channel 22, a second exhaust fan 231 is arranged in the second channel 23, the directions of the first exhaust fan 221 and the second exhaust fan 231 are opposite, and the first channel 22 and the second channel 23 can simultaneously supply air in opposite directions for two ends of the extending column 2, so that air circulation of the space at two ends of the extending column 2 is completed. The number of first suction fan 221 and second suction fan 231 is at least one. Thus, the exhaust fans work simultaneously, and the air supply efficiency is quickened.
Then the connection and the work of stretching out post 2, stretch out post 2 is provided with central shaft hole 21, be provided with dwang 11 and be used for the drive on the mount 1 dwang 11 pivoted driving machine 12, dwang 11 has at least a part to be located in the central shaft hole 21, the dwang 11 of mount 1 stretches into and passes and stretches out post 2's central shaft hole 21, and the external diameter of dwang 11 equals the internal diameter of central shaft hole 21, stretch out post 2 like this can fixed connection to mount 1 on, the rotation of stretching out post 2 is more stable when dwang 11 rotates. The axle center of the rotating rod 11 and the axle center of the central axle hole 21 are coaxially arranged, so that the rotation of the extending column 2 can not generate polarization damage, and the service life of the extending column 2 is longer.
Thus, the first exhaust fan 221 and the second exhaust fan 231 which are respectively arranged in the first channel 22 and the second channel 23 in the extending column 2 and are opposite in direction can work to ventilate, and meanwhile, the driving machine 12 is started to drive the extending column 2 to rotate, so that air flowing at the end part of the extending column 2 far away from the fixing frame 1 can be effectively stirred, and the ventilation range is larger.
The air guide protrusion 13 is arranged on one side, close to the extending 2 columns, of the fixing frame 1, and the air guide protrusion 13 is arranged on the other side. At least a part of the air guide bulge 13 is arc-shaped, and in fact, the air guide bulge 13 forms an arc-shaped inclined plane, so that air in a channel for supplying air in the direction close to the fixing frame 1 is effectively prevented from directly colliding with the fixing frame 1, the output air is rapidly guided away, and meanwhile, the air around the fixing frame 1 is guided into the channel for supplying air in the direction far away from the fixing frame 1.
In the invention, the wall can be directly perforated, then the extension column 2 passes through the wall hole, the air exchange at the two sides of the wall can be realized by fixing the fixing frame 1 on the original stage or the theatre wall, the installation can also be carried out on the existing waste water pipe, the ventilation pipe and even the wall gap, and the air circulation at the two ends can be completed only by ensuring that the gap for the air to pass through is reserved between the fixing frame 1 and the external wall.
Even the air exchange in two relatively independent spaces can be completed, for example, holes are punched on the wall between two rooms in good heart, and the air exchange is completed after the holes are completely punched, so that harmful substances are prevented from being gathered because a certain space cannot be ventilated for a long time.
The stage frame with the air circulation is simple in structure, convenient to install and maintain, can be directly installed on the existing air duct of a theatre, can be installed by punching at present, and has a good air supply effect.
In order to make the stage with air circulation of the present invention have better air supply effect and higher stability, as shown in fig. 1 to 4, the present invention further has the following design:
First, the number of the protruding columns 2 is at least one. A plurality of extension posts 2 may be arranged in parallel on a fixed frame 1, each extension post 2 being provided with a separately controlled drive machine 12, each extension post 2 being operated in a separate rotation. Or a plurality of extension columns 2 (as shown in fig. 2) are connected end to end in sequence on one rotating rod 11, so that the extension distance of the extension columns 2 is increased, and the situation that the extension columns 2 cannot extend into a place needing ventilation due to insufficient length is avoided.
Of course, the alignment of the first passages 22 and the second passages 23 is ensured when the plurality of protruding columns 2 on one rotation rod 11 are installed, the first passages 22 of the plurality of protruding columns 2 are communicated, the second passages 23 of the plurality of protruding columns 2 are communicated, and the more the number of protruding columns 2, the slower the rotation speed of the driving machine 12, and the stability of the protruding columns 2 in rotation is maintained.
The end of the fixing frame 1 is provided with a dust screen 15 extending in the direction of the projecting pole 2. Is used for blocking dust outside the fixing frame 1 from entering the channel extending out of the column 2 and the exhaust fan in the channel, so as to avoid dust entering of the exhaust fan.
Then, fixing legs 14 for fixing the fixing frame 1 are arranged at the edge of the fixing frame 1, and fixing bolts for fixing the fixing legs 14 are arranged on the fixing legs 14. The fixing leg 14 extends in a direction approaching the projecting pole 2. The length of the fixing feet 14 is larger than that of the dust screen 15, the number of the fixing feet 14 is at least one, and the fixing effect of a plurality of fixing feet 14 is better.
And a stopper 111 for restricting the position of the protruding column 2 is provided on the rotation lever 11. The position of the extension column 2 is limited, and the extension column 2 is prevented from being displaced along the axial direction of the rotating rod 11 during operation, so that the extension column 2 is damaged.
Of course, the number of the limiting blocks 111 is at least two, and both ends of the protruding column 2 should be provided with the limiting blocks 111.
Further, a stopper 111 of the rotating rod 11, which is far from one end of the fixed frame 1, is provided with a movable blade 112. The air stirring capacity of one side of the stirring extension column 2 far away from the fixing frame 1 is increased, and the air circulation range is accelerated.
Finally, the number of the first channels 22 and the second channels 23 is at least one, that is, a plurality of groups of the first channels 22 and the second channels 23 may be disposed on one protruding column 2, as shown in fig. 4, and only at least one first channel 22 and at least one second channel 23 need to exist at the same time to complete the air circulation exchange at two ends of the protruding column 2.
The stage frame with the air circulation is simple in structure, convenient to install and maintain, can be directly installed on the existing air duct of a theatre, can be installed by punching at present, and has a good air supply effect.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modification, equivalent replacement, improvement, etc. of the above embodiments according to the technical substance of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A stage frame with air circulation, characterized in that: the device comprises a fixing frame (1) and an extending column (2), wherein the extending column (2) is provided with a central shaft hole (21), a rotating rod (11) and a driver (12) for driving the rotating rod (11) to rotate are arranged on the fixing frame (1), at least a part of the rotating rod (11) is positioned in the central shaft hole (21), a first channel (22) and a second channel (23) are arranged on the extending column (2), a first exhaust fan (221) is arranged in the first channel (22), a second exhaust fan (231) is arranged in the second channel (23), the directions of the first exhaust fan (221) and the second exhaust fan (231) are opposite, and an air guide protrusion (13) is arranged on one side, close to the extending column (2), of the fixing frame (1). At least one part of the air guide bulge is arc-shaped, so that the air guide bulge forms an arc-shaped inclined plane, the air in the channel for supplying air in the direction close to the fixing frame is effectively prevented from directly colliding with the fixing frame, the delivered air is rapidly guided away, and meanwhile, the air around the fixing frame is also guided into the channel for supplying air in the direction far away from the fixing frame;
The number of the extending columns (2) is at least one, so that a plurality of extending columns are sequentially connected end to end on one rotating rod, the extending distance of the extending columns is increased, and the length of the extending columns is enough to extend into a position needing ventilation;
The rotating rod (11) is provided with limiting blocks (111) for limiting the position of the extending column (2), the number of the limiting blocks (111) is at least two, the limiting blocks (111) at one end, far away from the fixed frame (1), of the rotating rod (11) are provided with movable blades (112), the air stirring capacity of one side, far away from the fixed frame, of the extending column is increased, and the air circulation range is enlarged in an accelerating way;
The fixing frame is arranged on the original stage or theatre wall body, the extending column extends to a wall hole, a ventilation pipe or a wall notch, and an air circulation at two ends of the extending column can be completed by ensuring that an air passing gap is reserved between the fixing frame and an external wall.
2. A stage rack with air circulation according to claim 1, wherein: the side part of the fixing frame (1) is provided with fixing feet (14) for fixing the fixing frame (1).
3. A stage rack with air circulation according to claim 1, wherein: the end part of the fixing frame (1) is provided with a dustproof net (15) extending towards the direction of the extending column (2).
4. A stage rack with air circulation according to claim 1, wherein: the number of the first exhaust fan (221) and the second exhaust fan (231) is at least one.
5. A stage rack with air circulation according to claim 1, wherein: the number of the first channels (22) and the number of the second channels (23) are at least one.
CN201911126812.XA 2019-11-18 2019-11-18 Stage frame with air circulation Active CN110878977B (en)

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Application Number Priority Date Filing Date Title
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CN110878977B true CN110878977B (en) 2024-08-23

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205351524U (en) * 2016-01-19 2016-06-29 伯瑞(北京)室内环境科技有限公司 Pipeline formula runner heat exchanger and use its wall -hanging new fan
CN211233231U (en) * 2019-11-18 2020-08-11 杭州友邦演艺设备有限公司 Stage frame with air circulation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000046389A (en) * 1998-07-28 2000-02-18 Nippon Eisei Center:Kk Air agitator
KR101175254B1 (en) * 2009-05-13 2012-08-21 조은정 Air conditioning ventilation implement
IT1400661B1 (en) * 2010-06-21 2013-06-28 Cmp Impianti S R L DEVICE FOR VENTILATION OF AN ENVIRONMENT.
JP5517793B2 (en) * 2010-07-05 2014-06-11 三菱電機株式会社 Circulators and circulator systems
US20150275907A1 (en) * 2014-03-28 2015-10-01 Shop Vac Corporation Axial Flow Air Circulator
CN104456882B (en) * 2014-10-31 2017-06-06 广东美的制冷设备有限公司 Ducting system and its air supply method, fan and air-conditioner with the ducting system
CN204534966U (en) * 2015-03-26 2015-08-05 安徽悦达环保科技有限公司 A kind of cabin ventilator
CN205678853U (en) * 2016-06-13 2016-11-09 董潇儒 A kind of pressure changeable device of process chamber internal contamination air
CN208817646U (en) * 2018-07-26 2019-05-03 孙桂龙 A kind of communication machine room intelligent fresh air air interchanger
CN109723484B (en) * 2018-12-25 2020-10-09 长安大学 Closed pressure drainage combined ventilation system and ventilation method for tunnel construction by drilling and blasting method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205351524U (en) * 2016-01-19 2016-06-29 伯瑞(北京)室内环境科技有限公司 Pipeline formula runner heat exchanger and use its wall -hanging new fan
CN211233231U (en) * 2019-11-18 2020-08-11 杭州友邦演艺设备有限公司 Stage frame with air circulation

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