CN221260880U - Sealing strip sound insulation performance testing device - Google Patents
Sealing strip sound insulation performance testing device Download PDFInfo
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- CN221260880U CN221260880U CN202322648783.1U CN202322648783U CN221260880U CN 221260880 U CN221260880 U CN 221260880U CN 202322648783 U CN202322648783 U CN 202322648783U CN 221260880 U CN221260880 U CN 221260880U
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- sealing strip
- reverberation
- silencing
- space
- cabin
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- 238000007789 sealing Methods 0.000 title claims abstract description 92
- 238000009413 insulation Methods 0.000 title claims abstract description 53
- 238000012360 testing method Methods 0.000 title claims description 35
- 230000030279 gene silencing Effects 0.000 claims abstract description 57
- 230000001133 acceleration Effects 0.000 claims abstract description 14
- 238000011056 performance test Methods 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 5
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to the technical field of sealing strip sound insulation performance test, and discloses a sealing strip sound insulation performance test device, wherein a baffle plate assembly is positioned between a reverberation space and a silencing space and is provided with a sealing strip crack penetrating through the reverberation space and the silencing space, and the sealing strip crack is used for clamping and fixing a sealing strip sample; the volume acceleration sound source is positioned in the reverberation space, sound emitted by the volume acceleration sound source is reflected in the reverberation space to form a reverberation effect, and the sound elimination space eliminates the reflection of the sound in the reverberation space and reduces the interference caused by the reflected sound; the first sound collection assembly is located in the reverberation space, the second sound collection assembly is located in the silencing space, the sound insulation quantity TL (dB) =Lp1-Lp2 of the sealing strip sample can be calculated and obtained, and the sound insulation value PBNR (dB) =20xLG (P2/Qal) -9.5 of the sealing strip sample based on energy can be obtained. The sound insulation performance detection of a single sealing strip sample piece is realized.
Description
Technical Field
The utility model relates to the technical field of sealing strip sound insulation performance test, in particular to a sealing strip sound insulation performance test device.
Background
The automobile sealing strip is one of important parts of an automobile, has the functions of sealing, sound insulation, dust prevention, water seepage prevention and vibration reduction, and is widely applied to automobile doors, front cabins, trunk and other parts. With the development of the automobile industry, people pay more attention to the sound absorption and insulation performance of the whole automobile, and the sound insulation performance research on sealing strips of key sealing sound insulation pieces is very necessary.
The current evaluation of the sound insulation performance of the sealing strip is basically carried out on the whole automobile, such as the sound insulation performance evaluation of the areas of the automobile door and the like through ultrasonic leakage tests, PBNR and the like, and the impact evaluation of the sealing strip through wind noise tests, wherein the development and evaluation of the tests usually take the sound insulation performance of the whole sealing system into consideration, and the influence factors are more, so that the influence of a single sealing strip cannot be well evaluated, and the whole automobile test usually needs a large amount of early preparation work, and is time-consuming and labor-consuming.
Disclosure of utility model
The utility model discloses a sealing strip sound insulation performance testing device which is used for evaluating sound insulation performance of a single sealing strip.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
A sealing strip sound insulation performance testing device, comprising: the device comprises a reverberation space, a silencing space, a baffle plate assembly, a first sound collecting assembly, a second sound collecting assembly and a volume accelerating sound source; the baffle plate assembly is positioned between the reverberation space and the silencing space, and is provided with a sealing strip crack penetrating through the reverberation space and the silencing space, and the sealing strip crack is used for clamping and fixing a sealing strip sample; the volume acceleration sound source is positioned in the reverberation space, sound emitted by the volume acceleration sound source is reflected in the reverberation space to form a reverberation effect, and almost only propagates from the reverberation space to the silencing space through the sealing strip sample piece, and the silencing space eliminates the reflection of the sound in the interior of the silencing space and reduces interference caused by the reflected sound; the first sound collecting component is located in the reverberation space, so that the sound parameter reverberation space sound pressure level Lp1 in the reverberation space can be obtained, and the second sound collecting component is located in the silencing space, so that the sound pressure level Lp2 and the sound pressure P2 in the silencing space can be obtained. Furthermore, the sound insulation quantity TL (dB) =lp 1-Lp2 of the sealing strip sample can be calculated and obtained, and meanwhile, according to the volume acceleration Qal of the volume acceleration sound source, the sound insulation value PBNR (dB) =20×lg (P2/Qal) -9.5 of the sealing strip sample based on energy can be obtained. Above, realized the sound insulation performance detection to sealing strip sample piece list.
Optionally, the sealing strip sound insulation performance testing device comprises a reverberation cabin and a silencing cabin, and the baffle assembly is clamped between an opening of the reverberation cabin and an opening of the silencing cabin; the reverberation cabin and the baffle assembly enclose a reverberation space, and the silencing cabin and the baffle assembly enclose a silencing space.
Optionally, a first extension wall is arranged at the edge of the opening of the reverberation cabin, and a first sealing rubber ring is arranged between the first extension wall and the partition board assembly; the opening edge of the silencing cabin is provided with a second extension wall, and a second sealing rubber ring is arranged between the second extension wall and the baffle plate assembly.
Optionally, the bulkhead of the reverberation cabin is a rigid bulkhead; the inner wall surface of the silencing cabin is provided with a sound absorption layer.
Optionally, the separator assembly includes a first separator and a second separator arranged along a second direction, the first separator and the second separator forming the seal strip gap therebetween, wherein the second direction is perpendicular to the first direction.
Optionally, fastening screws are respectively arranged at two ends of the sealing strip crack, and each fastening screw penetrates through and is in threaded connection with the first partition plate and the second partition plate in sequence along the second direction.
Optionally, the sealing strip sound insulation performance testing device further comprises a clamping assembly, wherein the clamping assembly is used for driving the reverberation chamber and the silencing chamber to clamp the partition plate assembly along the first direction.
Optionally, the clamping assembly comprises a reference bracket and a linear drive; the reverberation cabin and the silencing cabin are arranged between the linear driving piece and the reference support, and the linear driving piece drives the silencing cabin and the reverberation cabin to be close to each other in the direction close to the reference support.
Optionally, the clamping assembly includes a frame, the reverberation chamber and the silencing chamber are both located in the frame, one end of the frame in the first direction forms the reference bracket, and the linear driving member is connected to the other end of the frame in the first direction.
Optionally, the linear driving piece includes the platform, rotates the hand wheel and follows the locking screw rod that the first direction extends, the locking screw rod with frame threaded connection, the platform with rotate the hand wheel respectively fixed connection in locking screw rod's both ends, the platform is located locking screw rod orientation the one end in amortization cabin.
Optionally, a locking structure is arranged on the frame, and the locking structure is used for fixing the locking screw rod with the frame.
Optionally, a plurality of pillows are laid at the bottom of the frame, and the reverberation cabin and the silencing cabin are both positioned on the pillows.
Drawings
Fig. 1 is a schematic structural diagram of a sealing strip sound insulation performance testing device provided by an embodiment of the application;
FIG. 2 is an exploded view of the combination of the reverberations compartment, the sound attenuation compartment, and the bulkhead assembly of FIG. 1;
FIG. 3 is an exploded view of the bulkhead assembly of FIG. 2;
fig. 4 is an internal structural diagram of a sealing strip sound insulation performance testing device provided by an embodiment of the application.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 4, a sealing strip sound insulation performance testing device provided by an embodiment of the present application includes: reverberation space S1, sound deadening space S2, partition plate assembly 10, first sound collection assembly 71, second sound collection assembly 72, and volume acceleration sound source 80, first sound collection assembly 71 and second sound collection assembly 72 may each be a microphone; the baffle assembly 10 is positioned between the reverberation space S1 and the silencing space S2, and a sealing strip gap G penetrating through the reverberation space S1 and the silencing space S2 is formed, the sealing strip gap G is used for clamping and fixing the sealing strip sample piece 60, so that the sealing strip is attached to the baffle 1, auxiliary materials (glue, hot melt adhesive, plasticine and the like) can be adopted for mounting and sealing the sealing strip sample piece 60, and the sealing strip fixing is performed in a simulated whole vehicle assembly state; wherein, the required sealing strip sample piece 60 can be sampled by referring to the height parameter of the sealing strip crack G; the volume acceleration sound source 80 is located in the reverberation space S1, specifically, a serpentine pipe of the volume acceleration sound source 80 is inserted into the reverberation space S1 from a side far away from the insertion silencing space S2, sound (white noise signal) emitted by the volume acceleration sound source 80 is reflected in the reverberation space S1 to form a reverberation effect, and almost only propagates from the reverberation space S1 to the silencing space S2 through the sealing strip sample 60, and the silencing space S2 eliminates reflection of sound in the interior thereof, so as to reduce interference caused by reflected sound; the first sound collection assembly 71 is located in the reverberant space S1, and can obtain the sound parameters in the reverberant space S1, the sound pressure level Lp1, and the second sound collection assembly 72 is located in the sound deadening space S2, and can obtain the sound pressure level Lp2 and the sound pressure P2 in the sound deadening space S2. Furthermore, the sound insulation TL (dB) =lp 1-Lp2, TL (dB) of the sealing strip sample 60 can be calculated and obtained, and can be converted into a third octave curve representation, and meanwhile, according to the volume acceleration Qal of the volume acceleration sound source 80, the sound insulation value PBNR (dB) =20xlg (P2/Qal) -9.5 of the sealing strip sample 60 based on energy can be obtained, and the sound insulation value PBNR (dB) can also be converted into a third octave curve representation. The sound insulation performance of the sealing strip sample 60 is detected. By accumulating test data of the sealing strip sample piece 60 and perfecting the sound insulation performance data of the lower sealing strip of the device, the single sound insulation performance index of the lower sealing strip of the device can be defined.
The device only needs to sample and test the sealing strip sample piece 60 to be tested, can independently evaluate the sound insulation performance of a single sealing strip sample piece 60, avoids verifying the sealing strip sample piece 60 on the whole vehicle, and greatly saves test cost and test period.
The manner of forming the reverberation space S1 and the sound deadening space S2 may be various, in a specific embodiment, the sealing strip sound insulation performance testing device includes the reverberation chamber 31 and the sound deadening chamber 32, the reverberation chamber 31 and the sound deadening chamber 32 may be a rigid wall cube with one open side, the partition board assembly 10 is clamped between the opening of the reverberation chamber 31 and the opening of the sound deadening chamber 32, the opening of the reverberation chamber 31 and the opening of the sound deadening chamber 32 are oppositely arranged along the first direction (the direction where the x axis is located), and the sealing strip crack G is respectively oppositely arranged with the opening of the reverberation chamber 31 and the opening of the sound deadening chamber 32.
Thus, the reverberant compartment 31 encloses a reverberant space S1 with the bulkhead assembly 10, and the muffling compartment 32 encloses a muffling space S2 with the bulkhead assembly 10. The structure is simple and reliable, when the test is needed, the sealing strip sample piece 60 is clamped and fixed in the sealing strip crack G, the reverberation cabin 31 and the silencing cabin 32 are utilized to clamp and fix the baffle assembly 10 in the middle, and then the sound insulation performance is detected in the mode. Openings for the volume acceleration sound source 80 and microphone openings can be provided in the reverberant compartment 31; microphone openings are provided in the sound attenuation chamber 32.
In a specific embodiment, a first extension wall 311 is arranged at the edge of the opening of the reverberation chamber 31, and a first sealing rubber ring is arranged between the first extension wall 311 and the partition board assembly 10; the opening edge of the sound attenuation cabin 32 is provided with a second external extension wall 321, and a second sealing rubber ring is arranged between the second external extension wall 321 and the baffle plate assembly 10. The first extension wall 311 and the second extension wall 321 respectively form a pressing plane, so that the contact area with the partition board assembly 10 is increased, and the tightness and the sound insulation effect with the outside are improved. The sealing performance and the sound insulation effect with the outside are further improved by arranging the first sealing rubber ring and the second sealing rubber ring. The first sealing rubber ring and the second sealing rubber ring can be formed by vulcanization.
In a particular embodiment, the bulkhead of the reverberant cabin 31 is a rigid bulkhead, which may be thick enough to isolate ambient sound; the sound absorbing layer is arranged on the inner wall surface of the silencing cabin 32 so as to eliminate the reflection of the sound transmitted by the seal strip sample piece 60 on the inner wall of the silencing cabin 32 and reduce interference.
In a specific embodiment, the separator assembly 10 includes a first separator 11 and a second separator 12 aligned along a second direction (a direction along a z-axis), where a thickness direction of the first separator 11 and a thickness direction of the second separator 12 are both along the first direction (a direction along an x-axis), the first separator 11 and the second separator 12 may each be aluminum separators, and a sealing strip gap G is formed between the first separator 11 and the second separator 12, and the second direction (the direction along the z-axis) is perpendicular to the first direction (the direction along the x-axis). The adjustment of the sealing strip gap G can be achieved by adjusting the relative positions of the first separator 11 and the second separator 12.
In a specific embodiment, two ends of the sealing strip crack G are respectively provided with a fastening screw 13, and each fastening screw 13 sequentially penetrates through and is in threaded connection with the first partition 11 and the second partition 12 along the second direction (the direction in which the z axis is located). The first partition plate 11 and the second partition plate 12 are fixedly connected by the fastening screw 13 so as to clamp the sealing strip sample piece 60, and meanwhile, the tightness of the fastening screw 13 is adjusted so as to adjust different compression amounts of the sealing strip sample piece 60 for testing. Good clamping degree can be maintained for the sealing strip sample pieces 60 with different section forms so as to test the sound insulation performance.
The fastening screw 13 is screwed to the first partition 11 and the second partition 12, respectively, for example, the fastening screw 13 penetrates completely through the first partition 11 through the first screw hole 13', and penetrates through the second partition 12 through a portion of the second partition 12 near the second screw hole 13″ of the first partition 11.
In a specific embodiment, the sealing strip sound insulation performance testing device further comprises a clamping assembly, wherein the clamping assembly is used for driving the reverberation chamber 31 and the silencing chamber 32 to clamp the baffle assembly 10 along a first direction (the direction of the x axis), so that good contact between the opening edge of the reverberation chamber 31 and the opening edge of the silencing chamber 32, which are closely attached to the baffle assembly 10, is ensured, and the sealing performance and the sound insulation effect with the outside are improved.
In one particular embodiment, the clamping assembly includes a reference bracket 211 and a linear drive 40; the reverberation cabin 31 and the silencing cabin 32 are arranged between the linear driving piece 40 and the reference bracket 211, the linear driving piece 40 drives the silencing cabin 32 and the reverberation cabin 31 to be close to each other in the direction of being close to the reference bracket 211, the linear driving piece 40 is matched with the reference bracket 211, the reverberation cabin 31 and the silencing cabin 32 are clamped on the baffle plate assembly 10, and the sealing performance and the sound insulation effect with the outside are improved.
In a specific embodiment, the clamping assembly includes a frame 20, the frame 20 may include a rectangular main frame 21, the reverberation chamber 31 and the silencing chamber 32 are located in the frame 20, and may be located in the rectangular main frame 21, one end of the frame 20 in a first direction (x-axis direction) forms a reference frame 211, the linear driving member 40 is connected to the other end of the frame 20 in the first direction (x-axis direction), the linear driving member 40 and the reference frame 211 are connected to the same basic structure, and when the linear driving member 40 approaches the reference frame 211, the space between the two is reduced, so that the clamping operation can be completed.
In a specific embodiment, the linear driving member 40 includes a pressing table 44, a rotating hand wheel 41, and a locking screw 43 extending along a first direction (the direction of the x-axis), the locking screw 43 is in threaded connection with the frame 20, one end of the rectangular main frame 21 is provided with the cross support 22, the locking screw 43 is specifically rotatably connected to the cross support 22 at the intersection, the pressing table 44 and the rotating hand wheel 41 are respectively and fixedly connected to two ends of the locking screw 43, and the pressing table 44 is located at one end of the locking screw 43 facing the silencing cabin 32. The contact surface of the pressing table 44 and the silencing chamber 32 is larger than the cross-sectional area of the locking screw 43, so that the pressure to the silencing chamber 32 is reduced, and the structure of the silencing chamber 32 is prevented from being damaged by pressing. The locking screw 43 can be rotated by rotating the hand wheel 41, and the pressing table 44 is further driven to press the silencing cabin 32.
In a specific embodiment, the frame 20 is provided with a locking structure 42, and the locking structure 42 is used to fix the locking screw 43 to the frame 20, so as to maintain the compression state of the sound attenuation module 32 and the reverberation module 31 when performing the test. The locking structure 42 may be a locking screw.
In a specific embodiment, a plurality of pillows 50 are laid at the bottom of the frame 20, and the reverberation chamber 31 and the sound deadening chamber 32 are both located on the pillows 50 so as to increase the supporting strength, and at the same time, the reverberation chamber 31 and the sound deadening chamber 32 are both slid on the pillows 50 to be pressed against each other.
It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present utility model without departing from the spirit and scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (12)
1. The utility model provides a sealing strip sound insulation capability test device which characterized in that includes: the device comprises a reverberation space, a silencing space, a baffle plate assembly, a first sound collecting assembly, a second sound collecting assembly and a volume accelerating sound source;
The reverberation space and the silencing space are arranged along a first direction, and the baffle assembly is positioned between the reverberation space and the silencing space and is provided with a sealing strip crack penetrating through the reverberation space and the silencing space;
The volume acceleration sound source is located in the reverberation space, the first sound collection assembly is located in the reverberation space for collection, and the second sound collection assembly is located in the silencing space.
2. The sealing strip sound insulation performance testing device according to claim 1, wherein the sealing strip sound insulation performance testing device comprises a reverberation cabin and a silencing cabin, and the baffle assembly is clamped between an opening of the reverberation cabin and an opening of the silencing cabin;
The reverberation cabin and the baffle assembly enclose a reverberation space, and the silencing cabin and the baffle assembly enclose a silencing space.
3. The sealing strip sound insulation performance testing device according to claim 2, wherein a first extension wall is arranged at the edge of the opening of the reverberation chamber, and a first sealing rubber ring is arranged between the first extension wall and the partition plate assembly; the opening edge of the silencing cabin is provided with a second extension wall, and a second sealing rubber ring is arranged between the second extension wall and the baffle plate assembly.
4. The sealing strip sound insulation performance test device according to claim 2, wherein the bulkhead of the reverberation cabin is a rigid bulkhead; the inner wall surface of the silencing cabin is provided with a sound absorption layer.
5. The weatherstrip acoustic performance testing device of claim 1, wherein said spacer assembly includes a first spacer and a second spacer aligned along a second direction, said first spacer and said second spacer defining said weatherstrip gap therebetween, wherein said second direction is perpendicular to said first direction.
6. The sealing strip sound insulation performance testing device according to claim 5, wherein fastening screws are respectively arranged at two ends of the sealing strip crack, and each fastening screw penetrates through the first partition plate and the second partition plate in sequence along the second direction and is in threaded connection with the first partition plate and the second partition plate.
7. The weatherstrip acoustic performance testing device of claim 2 further comprising a clamping assembly for driving said reverberant compartment and said sound attenuation compartment in said first direction to clamp said baffle assembly.
8. The sealing strip sound insulation performance testing device according to claim 7, wherein the clamping assembly comprises a reference bracket and a linear driving member;
The reverberation cabin and the silencing cabin are arranged between the linear driving piece and the reference support, and the linear driving piece drives the silencing cabin and the reverberation cabin to be close to each other in the direction close to the reference support.
9. The sealing strip sound insulation performance testing device according to claim 8, wherein the clamping assembly comprises a frame, the reverberation chamber and the silencing chamber are both located in the frame, one end of the frame in the first direction forms the reference support, and the linear driving member is connected to the other end of the frame in the first direction.
10. The sealing strip sound insulation performance testing device according to claim 9, wherein the linear driving piece comprises a pressing table, a rotary hand wheel and a locking screw rod extending along the first direction, the locking screw rod is in threaded connection with the frame, the pressing table and the rotary hand wheel are respectively and fixedly connected to two ends of the locking screw rod, and the pressing table is located at one end of the locking screw rod, which faces the silencing cabin.
11. The sealing strip sound insulation performance testing device according to claim 10, wherein a locking structure is arranged on the frame and used for fixing the locking screw rod with the frame.
12. The sealing strip sound insulation performance testing device according to claim 10, wherein a plurality of pillows are laid at the bottom of the frame, and the reverberation cabin and the silencing cabin are both located on the pillows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648783.1U CN221260880U (en) | 2023-09-27 | 2023-09-27 | Sealing strip sound insulation performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648783.1U CN221260880U (en) | 2023-09-27 | 2023-09-27 | Sealing strip sound insulation performance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221260880U true CN221260880U (en) | 2024-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322648783.1U Active CN221260880U (en) | 2023-09-27 | 2023-09-27 | Sealing strip sound insulation performance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221260880U (en) |
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2023
- 2023-09-27 CN CN202322648783.1U patent/CN221260880U/en active Active
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