CN211230125U - Anechoic room gate and anechoic room - Google Patents
Anechoic room gate and anechoic room Download PDFInfo
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- CN211230125U CN211230125U CN201921140934.XU CN201921140934U CN211230125U CN 211230125 U CN211230125 U CN 211230125U CN 201921140934 U CN201921140934 U CN 201921140934U CN 211230125 U CN211230125 U CN 211230125U
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- anechoic chamber
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Abstract
The application relates to an anechoic room gate, anechoic room gate includes: the frame body is of a rectangular structure, and a sealing element and a sealing assembly are arranged around the edge of the frame body and used for sealing the frame body; the sound absorption structure is arranged on one side of the frame body close to the anechoic chamber and is used for absorbing sound transmitted to a door of the anechoic chamber from the anechoic chamber; the counterweight is arranged at the bottom of the frame body and is positioned on one side opposite to the sound absorption structure, and is used for reducing the gravity center of the anechoic chamber gate and preventing the anechoic chamber gate from inclining; and at least two sets of transmission wheelsets, the transmission wheelset includes action wheel and follows the driving wheel, and action wheel and follow the driving wheel set up respectively in the both sides of frame body for drive anechoic chamber gate walking. The utility model provides a anechoic room gate has the ability of automatic opening and closing under the prerequisite that has better sound absorption performance and sound insulation performance, and the security is higher.
Description
Technical Field
The application belongs to the technical field of aeroengine acoustic tests, and particularly relates to a anechoic room gate, an anechoic room and a control system.
Background
In the process of carrying out a fan supercharging stage noise test with a large bypass ratio, a large-scale total anechoic chamber needs to be built. In order to ensure that the anechoic chamber can transport large-scale equipment such as test pieces, turbulence control screens and the like, an anechoic chamber gate meeting large-scale requirements needs to be built. The anechoic chamber gate is large in size, and the manual opening and closing of the anechoic chamber gate is very difficult and has no operability; meanwhile, the device belongs to a common part, is used for transporting test pieces and large-scale equipment, is convenient to open and close, and has certain safety. The anechoic chamber gate serving as a part of an anechoic chamber needs to have a certain sound insulation amount, so that on one hand, in order to ensure the accuracy of a test, a relatively closed environment is constructed, the external interference is reduced, and the validity of test data is ensured; on the other hand, the noise generated by the test is effectively reduced to interfere the outside.
Most of the existing anechoic chambers are small anechoic chambers, the sizes of test pieces are small, and a small door can meet the requirements. Because the size of the anechoic chamber gate is small, the corresponding weight of the anechoic chamber gate is not large, and the anechoic chamber gate can be opened and closed conveniently by hand. Therefore, small-sized manual doors are used. In order to ensure the free field/semi-free field environment of the anechoic chamber, a sound absorption structure is arranged in the anechoic chamber, and meanwhile, the sound insulation performance of the anechoic chamber meets certain indexes.
However, the above solution has the following disadvantages: 1) the gate is small in size, large test pieces and equipment cannot be transported, and if a large anechoic chamber is arranged, the gate can only be used for personnel to enter and exit and for carrying small equipment such as a microphone and a sound source; 2) the gate is manually operated, an automatic opening and closing system is lacked, and when the gate is large in size, the opening and closing difficulty is extremely high, time consumption is long, manpower and material resources are wasted, and the opening and closing cannot be realized basically.
In another solution, large automatic doors, such as roller doors, provided in common buildings and the like are generally used only for easy access to equipment, transport means and the like, and such automatic doors, although large in size, do not take sound insulation and absorption characteristics into consideration. The requirements of the large anechoic room door on sound insulation, sound absorption and other aspects cannot be met.
Therefore, the above solution has the following disadvantages: 1) the sound insulation performance is not considered at the gate, and if a large-scale anechoic room is arranged, external interference is introduced during the test, so that the test accuracy cannot be ensured; in addition, the noise outside the test chamber is too large, which not only seriously affects the normal operation of the test, but also seriously harms the health of the testers; 2) the gate is not provided with a sound absorption structure, and if a large-scale anechoic chamber is arranged, the free field environment cannot be ensured, so that the gate does not have test conditions.
In summary, the conventional small manual door and the conventional large automatic door of the anechoic chamber cannot meet the requirements of the large anechoic chamber, so that a door suitable for the large anechoic chamber is required to meet the requirements of the anechoic chamber on sound insulation and sound absorption properties, and the door can be opened automatically.
Disclosure of Invention
It is an object of the present application to provide an anechoic chamber gate to solve or mitigate at least one of the problems of the background art.
The technical scheme of the application is as follows: an anechoic chamber gate comprising:
the frame body is of a rectangular structure, and a sealing element and a sealing assembly are arranged around the edge of the frame body and used for sealing the frame body;
the sound absorption structure is arranged on one side, close to the anechoic chamber, of the frame body and is used for absorbing sound transmitted to a door of the anechoic chamber from the anechoic chamber;
the counterweight is arranged at the bottom of the frame body and is positioned on the side opposite to the sound absorption structure, and is used for lowering the gravity center of the anechoic chamber gate and preventing the anechoic chamber gate from inclining; and
at least two sets of transmission wheelsets, transmission wheelset includes action wheel and follows the driving wheel, action wheel and follow driving wheel set up respectively in the both sides of frame body are used for driving anechoic chamber gate walking.
In this application, the frame body is filled with sound absorbing material.
In an embodiment of the present application, the sound absorbing material comprises a spun glass wool felt.
In this application, the sound-absorbing structure includes wedge rail and wedge, the wedge rail is fixed in the frame body, the wedge install in the wedge rail.
In this application, the arrangement of sound-absorbing wedges is consistent with the arrangement of sound-absorbing wedges in the sound-deadening chamber.
In this application, be equipped with signal indicator on the counter weight, signal indicator is used for working as the anechoic room gate warns when opening.
In this application, still include brake motor, brake motor sets up on the counter weight, just brake motor connects the action wheel is used for the drive the anechoic room gate removes.
In this application, the perforation steel sheet that is used for eliminating the sound leakage is installed to the bottom surface of frame body, the through-hole in the perforation steel sheet becomes regular triangle and arranges, just the aperture opening ratio of perforation steel sheet is no less than 30%.
In this application, the bottom of the frame body has a laterally extending sealing channel track in which the sealing assembly is disposed.
In this application, seal assembly has relative first sealing strip and the second sealing strip that sets up, first sealing strip and second sealing strip are crooked in opposite direction in order to constitute sealed the seal structure of frame body and ground.
The anechoic chamber gate can be automatically opened and closed through the transmission wheel set capable of walking, and meanwhile, the safety of the gate is greatly improved by additionally arranging the balance weight at the bottom; the sound absorption wedge is arranged on one side of the anechoic chamber of the gate, so that the gate has sound absorption performance, and the free field environment of the full anechoic chamber is ensured; in addition, the sound insulation material is arranged in the gate, and the gate structure and the gate frame are sealed, so that the sealing performance of the gate of the anechoic chamber is guaranteed, and certain sound insulation requirements are met.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
Fig. 1 is a schematic structural diagram of a anechoic chamber gate according to an embodiment of the present application.
Figure 2 is a bottom view of a gate according to one embodiment of the present application.
FIG. 3 is a block diagram of an acoustical wedge according to an embodiment of the present application.
Figure 4 is an elevational view of a gate sound wedge installed in accordance with an embodiment of the present application.
FIG. 5 is a diagram of a seal bar assembly according to an embodiment of the present application.
Figure 6 is a top view of a gate sound wedge installation of an embodiment of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
In order to meet the requirement that a large-sized anechoic chamber gate has a large size and can be automatically opened and closed, a certain sound insulation amount needs to be ensured, after a sound absorption structure is installed, the anechoic chamber gate is heavy, the center of gravity is high, and once the anechoic chamber gate is toppled to cause great damage, the anechoic chamber gate is required to have good safety on the premise that the requirement is met.
To this end, the present application provides an anechoic chamber gate which mainly comprises the following aspects, as shown in fig. 1 to 6:
1. the anechoic chamber gate can be automatically opened and closed
The main structure of the anechoic chamber gate (hereinafter referred to as the gate) is a rectangular frame body 1, and the frame body 1 is formed by welding. The gate is driven to operate by a DEMAG travelling wheel system, a driving wheel 41 and a driven wheel 42 respectively form a pair of transmission wheel sets 4, and the driving wheel and the driven wheel are respectively positioned on two sides of the gate. In the illustrated embodiment, the transmission wheel sets 4 are two sets, each set being arranged along the transverse direction y of the frame body 1.
The variable-frequency speed-reducing brake motor 32 respectively drives the driving wheel 41, and the driving wheel 41 drives the driven wheel 42 to further drive the gate to travel. The walking speed of the gate is 100-150 mm/s, the gate gradually decelerates under the action of the variable-frequency deceleration braking motor 32, and when the gate runs to a distance of about 5 meters from a gate frame, the speed is reduced to 30-50 mm/s, so that the situation that the gate frame 5 is impacted too much due to inertia when the gate is limited and closed is avoided. In addition, an OMRON limit switch is respectively arranged on each side of the bottom of the gate for limiting when the gate is closed, and the two limit switches are connected in series to prevent the brake motor 32 from overloading and prevent the gate and the door frame 5 from bearing too much. The two corresponding positions of the two sides of the bottom of the door frame 5 are respectively provided with a 30-degree inclined plane collision block, and the connection and disconnection of a limit switch circuit are realized through the collision of the collision blocks, so that the limit closing of the door is realized.
2. Sound absorption structure mounted on inner side of anechoic chamber gate
The sound absorption structure 2 is installed on one side, close to the anechoic chamber, of the gate, the sound absorption structure 2 comprises a wedge sound absorption guide rail 21 and a wedge sound absorption 22, the wedge sound absorption guide rail 21 is installed on the frame body 1, the cross section of the wedge sound absorption 22 is in a triangular and rectangular mixed shape, a hook is arranged at the tail of the wedge sound absorption 22, and the wedge sound absorption guide rail 21 can be installed through the hook and the wedge sound absorption 22.
The anechoic chamber simulates a free field environment, the roof, the ground and the wall in the anechoic chamber are all covered with the sound-absorbing wedges, in order to ensure the excellent free field environment, the inner side of the gate of the anechoic chamber is also covered with the sound-absorbing wedges, and the sound-absorbing wedges 22 in the gate follow the following arrangement rules: the indoor sound absorption wedges for eliminating the noise are arranged crosswise, namely two or more sound absorption wedges are transversely arranged, two sound absorption wedges adjacent to the sound absorption wedges are longitudinally arranged, and the like. The arrangement mode of the sound-absorbing wedges 21 on the sound-absorbing structure 2 is consistent with the structure and arrangement of the sound-absorbing wedges in the anechoic chamber, so that the anechoic chamber can have an excellent acoustic free field environment in a frequency range of 160 Hz-40 kHz.
It should be noted that, the bottom space that the wedge absorber occupied in this application has the rectangle, therefore the quantity that the wedge absorber was arranged violently and vertically depends on the ratio of the length of wedge absorber and its width, when its length was twice of width, then the range is two violently and vertically, when its length was three of width, then the range is three violently and vertically, so on.
3. Sound insulation performance of anechoic chamber gate
The sound absorption material is filled in the frame body 1 of the anechoic chamber gate and the strip-shaped sound insulation frame in the middle of the door seat, and in the embodiment, the sound absorption material adopts centrifugal glassA cotton felt having a density of approximately 40kg/m3It can be used for sound insulation.
Sealing materials are used for sealing among various structures of the gate, for example, sealing materials 11 are used for sealing between the frame body 1 and the sound absorption structure 2, between the frame body 1 and the counterweight 3 and between the frame body 1 and the door frame 5. Further, a seal assembly 12 is used to seal between the frame body 1 and the ground 15. In one embodiment of the present application, the sealing material or the sealing member may be a nitrile rubber plate for sealing and sound insulation.
For example, in the sealing process between the frame body 1 and the door frame 5, sealing tenons are installed at both sides of the frame body 1 near one side of the anechoic chamber, and the sealing tenons are coupled with the frame body 1 through rubber sealing plates. Before the sealed tenon of installation, earlier flatten the processing to the welding seam of the sealed face of frame body 1: the welding seam of the convex sealing surface is polished to be flush with the sealing surface, and the concave welding seam can be filled with epoxy resin to be flush with the sealing surface.
The bottom of frame body 1 is equipped with seal groove 14 along transversely, and the packing is filled the soft rubber strip of foaming in seal groove 14, and the sealed tenon inserts in the seal groove of frame body 1 to realize that the sound insulation is sealed. After the sealing tenon is inserted into the sealing groove of the frame body 1, the bottom of the frame body 1 is sealed in a sound-proof manner by the sealing assembly 12 inserted into the sealing groove 14. The seal assembly 12 has a first seal strip 121 and a second seal strip 122 which are disposed opposite to each other and bent toward the middle portion, thereby sealing a gap between the frame body 1 and the floor 15. Because a gap exists between the bottom of the sealing tenon and the ground 15, the inner side and the outer side of the sealing tenon are respectively connected with a nitrile rubber plate or felt with the thickness of 5mm, and the rubber plate or the felt is pressed and connected on the tenon through a steel bar with the thickness of 3mm, thereby achieving the purpose of sound insulation and sealing. And the rest small gaps are plugged by filling epoxy resin or soft materials.
The grooves on two sides of the ground steel rail are filled with centrifugal glass wool to prevent sound leakage at the positions, but the filling amount needs to be controlled to prevent the excessively compact glass wool from exerting excessive counter force on the travelling wheels so as to reduce the adhesive force of the travelling wheels.
Perforated steel plates are adopted at the bottom of the sound insulation frame of the door seat and the inner side of the door frame to eliminate sound leakage, as shown in figure 2, the plate thickness is 1.6mm, the aperture is phi 3mm, the regular triangle is arranged, and the aperture ratio is at least 30%, so that the requirement of wind speed is met.
By the measures, the background noise of the anechoic chamber is lower than 10dBA, and the background noise of the equipment in no-load running is lower than 45 dBA.
4. Safety of anechoic room gate
In this application, the anechoic room gate is applied to large-scale complete anechoic room, and the size of anechoic room gate is great, and the size is: the height is 5m, the width is 5m, so the weight is large, the gravity center is high, meanwhile, a sound absorption structure is arranged on one side of a silencing chamber of the gate, the gravity center of the gate is further unstable, once the gate is toppled, immeasurable loss is caused to personnel and equipment, and great potential safety hazards exist.
Therefore, in the application, a counterweight is added at the bottom of the gate, and the counterweight 3 is fixed with the frame body 1. In this application in-service use process, the quality of counter weight is 3 tons, and the gate gross weight is 5 tons, has reduced the focus at gate through the counter weight 3 that sets up, has increased its stability, the effectual fall that prevents the gate and incline.
Meanwhile, a signal indicator lamp 31 is arranged on a base of a counterweight of the gate, and the signal indicator lamp 31 is red. When the gate is opened or closed, the signal indicator lamp 31 flashes to give an alarm to warn equipment operators, so that safety guarantee is increased.
The anechoic chamber gate can be automatically opened and closed through the transmission wheel set capable of walking, and meanwhile, the safety of the gate is greatly improved by additionally arranging the balance weight at the bottom; the sound absorption wedge is arranged on one side of the anechoic chamber of the gate, so that the gate has sound absorption performance, and the free field environment of the full anechoic chamber is ensured; in addition, the sound insulation material is arranged in the gate, and the gate structure and the gate frame are sealed, so that the sealing performance of the gate of the anechoic chamber is guaranteed, and certain sound insulation requirements are met.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. Anechoic chamber gate is characterized by comprising
The frame comprises a frame body (1), wherein the frame body (1) is of a rectangular structure, and a sealing element (11) and a sealing assembly (12) are arranged around the edge of the frame body (1) and used for sealing the frame body (1);
the sound absorption structure (2) is arranged on one side, close to the anechoic chamber, of the frame body (1) and is used for absorbing sound transmitted to a door of the anechoic chamber from the anechoic chamber;
the counterweight (3) is arranged at the bottom of the frame body (1) and is positioned on the side opposite to the sound absorption structure (2), and is used for lowering the gravity center of the anechoic chamber gate and preventing the anechoic chamber gate from inclining; and
at least two sets of transmission wheelset (4), transmission wheelset (4) include action wheel (41) and follow driving wheel (42), action wheel (41) and follow driving wheel (42) set up respectively in the both sides of frame body (1) are used for driving anechoic chamber gate walking.
2. Anechoic chamber gate according to claim 1, characterised in that said frame body (1) is filled with sound absorbing material.
3. The anechoic chamber gate of claim 2, wherein the sound absorbing material comprises a spun glass wool felt.
4. Anechoic chamber gate according to claim 1, characterised in that said sound-absorbing structure (2) comprises a wedge rail (21) and a wedge (22), said wedge rail (21) being fixed to said frame body (1), said wedge (22) being mounted on said wedge rail (21).
5. Anechoic chamber gate according to claim 4, characterised in that the arrangement of the acoustic wedges (22) coincides with the arrangement of the acoustic wedges inside the anechoic chamber.
6. Anechoic chamber gate as claimed in claim 1, characterised in that on said counterweight (3) there is a signal indicator light (31), said signal indicator light (31) being intended to warn when said anechoic chamber gate is opened or closed.
7. Anechoic chamber gate according to claim 1, characterized in that it further comprises a braking motor (32), said braking motor (32) being arranged on said counterweight (3) and said braking motor (32) being connected to said driving wheel (41) for driving the anechoic chamber gate in movement.
8. The anechoic chamber gate as claimed in claim 1, characterized in that a perforated steel plate (13) for eliminating sound leakage is mounted on the bottom surface of the frame body (1), the through holes in the perforated steel plate (13) are arranged in a regular triangle, and the opening ratio of the perforated steel plate (13) is not less than 30%.
9. Anechoic chamber gate according to claim 1, characterized in that the bottom of said frame body (1) has a sealing groove track (14) extending transversely, said sealing assembly (12) being placed in said sealing groove track (14).
10. Anechoic chamber gate according to claim 9, characterized in that said sealing assembly (12) has a first sealing strip (121) and a second sealing strip (122) arranged opposite each other, said first sealing strip (121) and second sealing strip (122) being bent in opposite directions to constitute a sealing structure sealing said frame body (1) with the ground (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921140934.XU CN211230125U (en) | 2019-07-19 | 2019-07-19 | Anechoic room gate and anechoic room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921140934.XU CN211230125U (en) | 2019-07-19 | 2019-07-19 | Anechoic room gate and anechoic room |
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| Publication Number | Publication Date |
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| CN211230125U true CN211230125U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921140934.XU Active CN211230125U (en) | 2019-07-19 | 2019-07-19 | Anechoic room gate and anechoic room |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901042A (en) * | 2021-02-22 | 2021-06-04 | 上海声望声学科技股份有限公司 | Ultra-large electrically driven sound insulation door structure of wind tunnel anechoic chamber |
-
2019
- 2019-07-19 CN CN201921140934.XU patent/CN211230125U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901042A (en) * | 2021-02-22 | 2021-06-04 | 上海声望声学科技股份有限公司 | Ultra-large electrically driven sound insulation door structure of wind tunnel anechoic chamber |
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