CN220151913U - Large rectangular air valve - Google Patents
Large rectangular air valve Download PDFInfo
- Publication number
- CN220151913U CN220151913U CN202321597550.7U CN202321597550U CN220151913U CN 220151913 U CN220151913 U CN 220151913U CN 202321597550 U CN202321597550 U CN 202321597550U CN 220151913 U CN220151913 U CN 220151913U
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- half shaft
- fixedly connected
- frame
- longitudinal frame
- left half
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- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000000712 assembly Effects 0.000 claims abstract description 10
- 238000000429 assembly Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 11
- 230000009471 action Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a large rectangular air valve, which comprises a driving device, wherein the driving device is fixedly connected to a valve body through a bracket; the output end of the driving device is fixedly connected with the driving shaft; the driving shaft is fixedly connected with one end of a left half shaft, the other end of the left half shaft is rotationally connected with a longitudinal frame assembly positioned at the left side, and the driving shaft is coaxial with the left half shaft; one end of the right half shaft is rotationally connected with the longitudinal frame component positioned on the right side, and the other end of the right half shaft is rotationally connected with the valve body; the left longitudinal frame assembly and the right longitudinal frame assembly are fixedly connected, and the upper ends and the lower ends of the two longitudinal frame assemblies are fixedly connected with the valve body; the left half shaft and the right half shaft are fixedly connected; the blades are fixedly connected with the left half shaft and the right half shaft respectively; all left half shafts are in transmission connection through a connecting rod assembly. The utility model solves the problems of complex integral installation, poor sealing performance, low integral strength, long installation and debugging time, higher cost and the like of the existing large rectangular air valve.
Description
Technical Field
The utility model belongs to the technical field of air valves, and relates to a large rectangular air valve.
Background
The air valve is an indispensable end control accessory and an important component part in ventilation, air conditioning and air purification engineering of industrial plants, civil buildings, nuclear power plants and the like, is generally used in a ventilation system pipeline, and adjusts the air quantity and pressure of a branch pipe by adjusting the rotary opening degree of an air valve blade; the device can also be used for adjusting the mixing amount of fresh air and return air. Therefore, the indoor temperature, humidity and pressure are kept within the specified limit values, filtered air is limited, and the diffusion of radioactive pollutants to the environment is reduced, so that the working environment required by equipment and personnel is met under various working conditions of industrial plants, civil buildings, nuclear power plants and the like.
At present, in the fields of industrial plants, civil buildings, nuclear power plants and the like, more and more working conditions begin to apply large rectangular air valves. The existing large rectangular air valve mostly adopts a combined structure, namely, two or more valves are combined and tiled for installation. And then the valves are respectively driven by a driving device, a connecting rod structure, a chassis and the like. The structure is complex in integral installation, poor in tightness, low in integral strength, long in installation and debugging time and high in cost.
Disclosure of Invention
In order to achieve the purpose, the utility model provides the large rectangular air valve, which solves the problems of complex integral installation, poor sealing performance, low integral strength, long installation and debugging time, high cost and the like of the existing large rectangular air valve.
In order to solve the technical problems, the technical scheme adopted by the utility model is that the large rectangular air valve comprises a driving device, wherein the driving device is fixedly connected to a valve body through a bracket; the output end of the driving device is fixedly connected with the driving shaft; the driving shaft is fixedly connected with one end of a left half shaft, the other end of the left half shaft is rotationally connected with a longitudinal frame assembly positioned at the left side, and the driving shaft is coaxial with the left half shaft; one end of the right half shaft is rotationally connected with the longitudinal frame component positioned on the right side, and the other end of the right half shaft is rotationally connected with the valve body; the left longitudinal frame assembly and the right longitudinal frame assembly are fixedly connected, and the upper ends and the lower ends of the two longitudinal frame assemblies are fixedly connected with the valve body; the left half shaft and the right half shaft are fixedly connected; the blades are fixedly connected with the left half shaft and the right half shaft respectively; all left half shafts are in transmission connection through a connecting rod assembly.
Further, the two longitudinal frame components are fixedly connected through a first bolt, a first nut, a first flat pad and a first elastic pad; the second sealing strip is positioned at the joint of the two longitudinal frame components.
Further, the longitudinal frame assembly is fixedly connected with the valve body through a second bolt, a second nut, a second flat pad and a second elastic pad; the first sealing strip is located at the joint of the longitudinal frame assembly and the valve body.
Further, the left half shaft and the valve body as well as the right half shaft and the valve body are rotationally connected through bearings; the first bearing cover is sleeved on the left half shaft and is fixed on the left side of the valve body; the second bearing cover is positioned at the right end of the right half shaft and is fixed on the right side of the valve body; the first bearing cover is a bearing through cover, and the second bearing cover is a bearing end cover.
Further, the first bearing cover is fixedly connected with the valve body, and the second bearing cover is fixedly connected with the valve body through a third bolt, a third nut and a third spring pad.
Further, the longitudinal frame component comprises a longitudinal frame, and the left half shaft and the longitudinal frame, and the right half shaft and the longitudinal frame are all rotationally connected through copper sleeves; the copper sleeve is positioned in the stop block, and the stop block is fixed on the longitudinal frame; a valve seat is arranged between the longitudinal frame and the blade; the longitudinal frame is a sheet metal bending piece, and is provided with bolt holes and shaft holes.
Further, the left half shaft and the right half shaft are fixedly connected through a coupler.
Further, the valve body comprises a left frame, a top frame, a right frame and a bottom frame which are sequentially and fixedly connected to form a rectangle, wherein the left frame is rotationally connected with a left half shaft, the right frame is rotationally connected with a right half shaft, and the top frame and the bottom frame are respectively and fixedly connected with different longitudinal frame components; one end of the middle transverse frame is fixed at the middle position of the left frame, and the other end of the middle transverse frame is fixed at the middle position of the right frame.
Further, the connecting rod assembly comprises a rocker arm, one end of the rocker arm is fixedly connected with the left half shaft, the other end of the rocker arm is rotationally connected with a second connecting rod, the first rocker arm, the third rocker arm and the fifth rocker arm are rotationally connected with one second connecting rod from top to bottom, the second rocker arm, the fourth rocker arm and the sixth rocker arm are rotationally connected with the other second connecting rod, the first rocker arm is in transmission connection with the second rocker arm through the first connecting rod, and the left half shaft connected with the second rocker arm is a left half shaft fixedly connected with the driving shaft.
Further, a limiting piece is arranged on the longitudinal frame component.
The beneficial effects of the utility model are as follows:
1. the combined air valve is changed into an integral air valve structure, so that the material cost is reduced, the sheet metal bending control is reduced, the processing, assembling and field installation efficiency is improved, and the integral strength of the valve is greatly enhanced.
2. The traceability of the parts is improved, and the control of the parts in the production process is reduced.
3. Can be simultaneously applied to the air valve field in nuclear power and industrial industries.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a large rectangular air valve according to an embodiment of the present utility model.
Fig. 2 is a sectional view of K-K of fig. 1.
Fig. 3 is a sectional view of L-L of fig. 1.
Fig. 4 is a cross-sectional view of M-M of fig. 1.
Fig. 5 is an N-N cross-sectional view of fig. 1.
Fig. 6 is an enlarged view at E in fig. 2.
Fig. 7 is a schematic view of a valve body structure according to an embodiment of the present utility model.
Fig. 8 is an O-O cross-sectional view of fig. 7.
Fig. 9 is a P-P cross-sectional view of fig. 7.
Fig. 10 is a schematic structural view of a middle cross frame according to an embodiment of the present utility model.
Fig. 11 is an expanded view of the middle cross frame of an embodiment of the present utility model.
In the drawings, 1, a driving device, 2, a bracket, 3, a valve body, 302, a left frame, 303, a top frame, 304, a right frame, 305, a middle cross frame, 306, a bottom frame, 4, a blade, 5, a longitudinal frame assembly, 501, a longitudinal frame, 502, a stop, 503, a copper sleeve, 504, a valve seat, 6, a left half shaft, 7, a right half shaft, 8, a coupling, 9, a first connecting rod, 10, a second connecting rod, 11, a rocker arm, 12, a first bearing cover, 13, a bearing, 14, a second bearing cover, 15, a first sealing strip, 16, a first bolt, 17, a first nut, 18, a first flat pad, 19, a first spring pad, 20, a second sealing strip, 21, a second bolt, 22, a second nut, 23, a second flat pad, 24, a second spring pad, 25, a limiting piece, 26, a third bolt, 27, a third nut, 28, a third spring pad, and 29.
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.
As shown in fig. 1-11, the utility model provides a large rectangular air valve, a driving device 1, wherein the driving device 1 is fixedly connected to a valve body 3 through a bracket 2; the output end of the driving device 1 is fixedly connected with a driving shaft 29; the driving shaft 29 is fixedly connected with one end of the left half shaft 6, the other end of the left half shaft 6 is rotationally connected with the left longitudinal frame assembly 5, and the driving shaft 29 is coaxial with the left half shaft 6; one end of the right half shaft 7 is rotationally connected with the longitudinal frame component 5 positioned on the right side, and the other end of the right half shaft 7 is rotationally connected with the valve body 3; the left longitudinal frame assembly 5 and the right longitudinal frame assembly 5 are fixedly connected, and the upper ends and the lower ends of the two longitudinal frame assemblies 5 are fixedly connected with the valve body 3; the left half shaft 6 and the right half shaft 7 are fixedly connected through a coupler 8; the blades 4 are fixedly connected with a left half shaft 6 and a right half shaft 7 respectively; all the left half shafts 6 are in transmission connection through a connecting rod assembly. When the valve is opened, the driving device 1 rotates positively, the driving shaft 29 drives the left half shaft 6 connected with the driving device to rotate, all the left half shafts 6 rotate under the action of the connecting rod assembly, and the left half shaft 6 drives the right half shaft 7 to rotate under the action of the coupler 8; the blades 4 are driven to rotate by the rotation of the left half shaft 6 and the right half shaft 7, and the valve is opened. When the valve is closed, the driving device 1 reverses, the driving shaft 29 drives the left half shaft 6 connected with the driving device to reversely rotate, all the left half shafts 6 reversely rotate under the action of the connecting rod assembly, and the left half shaft 6 drives the right half shaft 7 to reversely rotate under the action of the coupler 8; the blades 4 are driven to reversely rotate by the rotation of the left half shaft 6 and the right half shaft 7, and the valve is closed.
In some embodiments, as shown in fig. 6, the two longitudinal frame assemblies 5 are fixedly connected through a first bolt 16, a first nut 17, a first flat pad 18 and a first elastic pad 19; adopt detachable connection, simple to operate is swift. The second sealing strip 20 is located at the joint of the two longitudinal frame assemblies 5 and is used for guaranteeing the tightness between the longitudinal frame assemblies 5.
In some embodiments, as shown in fig. 5, the longitudinal frame assembly 5 is fixedly connected with the valve body 3 through a second bolt 21, a second nut 22, a second flat pad 23 and a second elastic pad 24; the detachable connection is adopted, so that the installation and the detachment are convenient and quick; the first sealing strip 15 is located at the joint of the longitudinal frame assembly 5 and the valve body 3 and is used for guaranteeing tightness between the longitudinal frame assembly 5 and the valve body 3.
In some embodiments, as shown in fig. 2, the left half shaft 6 and the valve body 3, and the right half shaft 7 and the valve body 3 are rotatably connected through bearings 13; the first bearing cover 12 is sleeved on the left half shaft 6 and is fixed on the left side of the valve body 3; the first bearing cover 12 and the valve body 3, and the second bearing cover 14 and the valve body 3 are fixedly connected through a third bolt 26, a third nut 27 and a third spring pad 28; the second bearing cover 14 is positioned at the right end of the right half shaft 7 and is fixed on the right side of the valve body 3; the first bearing cap 12 is a bearing penetration cap and the second bearing cap 14 is a bearing cap. The bearing 13 is adopted to realize rotation connection, so that the rotation is smoother.
In some embodiments, as shown in fig. 6, the left half shaft 6 and the longitudinal frame component 5, and the right half shaft 7 and the longitudinal frame component 5 are rotatably connected through a copper sleeve 503; the copper sleeve 503 is positioned in the stop block 502, the stop block 502 is fixed on the longitudinal frame 501, and the stop block 502 plays a role in preventing the copper sleeve 503 from moving; the coupler 8 is positioned between the two longitudinal frame assemblies 5, so that the installation and the disassembly are convenient; a valve seat 504 is provided between the vertical frame 501 and the vane 4 of the valve, and the valve seat 504 plays a sealing role.
In some embodiments, as shown in fig. 10 to 11, the longitudinal frame 501 is a sheet metal bending part, and has bolt holes and shaft holes formed thereon for mounting the first bolt 16, the second bolt 21, the left half shaft 6 and the right half shaft 7.
In some embodiments, as shown in fig. 7-9, the valve body 3 includes a left frame 302, a top frame 303, a right frame 304, and a bottom frame 306, where the left frame 302, the top frame 303, the right frame 304, and the bottom frame 306 are sequentially and fixedly connected to form a rectangle, and the left frame 302 is rotationally connected to the left half shaft 6, the right frame 304 is rotationally connected to the right half shaft 7, and the top frame 303 and the bottom frame 306 are respectively and fixedly connected to different longitudinal frame assemblies 5. The valve body 3 further comprises a middle transverse frame 305 which is transversely arranged, and the middle transverse frame 5 divides the valve body 3 into an upper part and a lower part; one end of the middle transverse frame 305 is fixed at the middle position of the left frame 302, and the other end of the middle transverse frame 305 is fixed at the middle position of the right frame 304; the middle transverse frame 305 is transversely connected with the left frame 302 and the right frame 304, and meanwhile, the integral strength of the valve is greatly enhanced by being matched with the longitudinal frame assembly 5, so that the integral structure of the valve is prevented from deforming in the working process.
In some embodiments, the connecting rod assembly comprises a rocker arm 11, one end of the rocker arm 11 is fixedly connected with the left half shaft 6, the other end of the rocker arm 11 is rotatably connected with a second connecting rod 10, wherein a first rocker arm 11, a third rocker arm 11 and a fifth rocker arm 11 are rotatably connected with one second connecting rod 10, a second rocker arm 11, a fourth rocker arm 11 and a sixth rocker arm 11 are rotatably connected with the other second connecting rod 10, the first rocker arm 11 and the second rocker arm 11 are in transmission connection through a first connecting rod 9, namely, one end of the first connecting rod 9 is rotatably connected with the first rocker arm 11, the other end of the first connecting rod 9 is rotatably connected with the second rocker arm 11, and the left half shaft 6 connected with the second rocker arm 11 is the left half shaft 6 fixedly connected with the driving shaft 29. For convenience of description, the rocker arms 11 are sequentially arranged from top to bottom and are divided into a first half shaft 6, a second half shaft 6 and a driving shaft 29, wherein the first half shaft 6 is fixedly connected with the second half shaft 6.
In some embodiments, a stop 25 is provided on the longitudinal frame assembly 5 to prevent over-opening of the valve blade 4.
The utility model has the following advantages:
1. the valve body 3 adopts an integral structure, the connection of the longitudinal frame 501 is added in the valve body 3, and the welding deformation is easy to adjust and control. Meanwhile, a closed space can be formed in the valve body 3, so that no external leakage and internal leakage are ensured.
2. According to the utility model, the left half shaft 6 and the right half shaft 7 are connected together by the coupler 8 to drive the blades 4 to rotate, so that the coaxiality requirements of holes formed in the left/right ends of the installed valve body 3 and the middle copper sleeve 503 are reduced, and the hole forming precision of the two ends of the valve body 3 and the machining precision of the left half shaft 6 and the right half shaft 7 are reduced. Meanwhile, the installation efficiency is improved, and the operation skill is reduced.
3. The length of the blade 4 can be controlled within the length range of difficult deformation, the longitudinal frame 501 divides the blade 4 into two parts, and the whole structure of the blade 4 has no distortion and deformation phenomenon.
The working process of the utility model is as follows:
when the valve is opened, the driving device 1 rotates positively, the left half shaft 6 connected with the driving device is driven to rotate by the driving shaft 29, the left half shaft 6 drives the second rocker arm 11 to rotate, the second rocker arm 11 drives the first rocker arm 11 to rotate by the first connecting rod 9, the two rocker arms 11 drive the other rocker arms 11 to rotate by the second connecting rod 10 respectively, and the left half shaft 6 is driven to rotate while the rocker arms 11 rotate; the left half shaft 6 drives the right half shaft 7 to rotate under the action of the coupler 8; the blades 4 are driven to rotate by the rotation of the left half shaft 6 and the right half shaft 7, and the valve is opened. When the valve is closed, the driving device 1 reverses, the driving shaft 29 drives the left half shaft 6 connected with the driving device to reversely rotate, other left half shafts 6 reversely rotate under the action of the connecting rod assembly, and the left half shaft 6 drives the right half shaft 7 to reversely rotate under the action of the coupler 8; the blades 4 are driven to reversely rotate by the rotation of the left half shaft 6 and the right half shaft 7, and the valve is closed.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (10)
1. The large rectangular air valve is characterized by comprising a driving device (1), wherein the driving device (1) is fixedly connected to a valve body (3) through a bracket (2); the output end of the driving device (1) is fixedly connected with the driving shaft (29); the driving shaft (29) is fixedly connected with one end of the left half shaft (6), the other end of the left half shaft (6) is rotationally connected with the left longitudinal frame assembly (5), and the driving shaft (29) is coaxial with the left half shaft (6); one end of a right half shaft (7) is rotationally connected with a longitudinal frame component (5) positioned on the right side, and the other end of the right half shaft (7) is rotationally connected with the valve body (3); the left longitudinal frame assembly (5) and the right longitudinal frame assembly (5) are fixedly connected, and the upper ends and the lower ends of the two longitudinal frame assemblies (5) are fixedly connected with the valve body (3); the left half shaft (6) and the right half shaft (7) are fixedly connected; the blades (4) are respectively and fixedly connected with a left half shaft (6) and a right half shaft (7); all left half shafts (6) are in transmission connection through a connecting rod assembly.
2. The large rectangular air valve according to claim 1, wherein the valve body (3) comprises a left frame (302), a top frame (303), a right frame (304) and a bottom frame (306) which are sequentially and fixedly connected to form a rectangle, wherein the left frame (302) is rotationally connected with a left half shaft (6), the right frame (304) is rotationally connected with a right half shaft (7), and the top frame (303) and the bottom frame (306) are respectively and fixedly connected with different longitudinal frame assemblies (5); one end of the middle transverse frame (305) is fixed at the middle position of the left frame (302), and the other end of the middle transverse frame (305) is fixed at the middle position of the right frame (304).
3. A large rectangular air valve according to claim 1, characterized in that the connecting rod assembly comprises a rocker arm (11), one end of the rocker arm (11) is fixedly connected with the left half shaft (6), the other end of the rocker arm (11) is rotatably connected with a second connecting rod (10), the first, third and fifth rocker arms (11) from top to bottom are rotatably connected with one second connecting rod (10), the second, fourth and sixth rocker arms (11) are rotatably connected with the other second connecting rod (10), the first rocker arm (11) and the second rocker arm (11) are in transmission connection through a first connecting rod (9), and the left half shaft (6) connected with the second rocker arm (11) is the left half shaft (6) fixedly connected with the driving shaft (29).
4. A large rectangular air valve according to claim 1, characterized in that the two longitudinal frame components (5) are fixedly connected through a first bolt (16), a first nut (17), a first flat pad (18) and a first spring pad (19); the second sealing strip (20) is positioned at the joint of the two longitudinal frame components (5).
5. A large rectangular air valve according to claim 1, wherein the longitudinal frame assembly (5) is fixedly connected with the valve body (3) through a second bolt (21), a second nut (22), a second flat pad (23) and a second elastic pad (24); the first sealing strip (15) is positioned at the joint of the longitudinal frame assembly (5) and the valve body (3).
6. A large rectangular air valve according to claim 1, characterized in that the left half shaft (6) and the valve body (3) and the right half shaft (7) and the valve body (3) are rotationally connected through bearings (13); the first bearing cover (12) is sleeved on the left half shaft (6) and is fixed on the left side of the valve body (3); the second bearing cover (14) is positioned at the right end of the right half shaft (7) and is fixed on the right side of the valve body (3); the first bearing cover (12) is a bearing through cover, and the second bearing cover (14) is a bearing end cover.
7. A large rectangular air valve according to claim 6, wherein the first bearing cover (12) and the valve body (3) and the second bearing cover (14) and the valve body (3) are fixedly connected through a third bolt (26), a third nut (27) and a third spring pad (28).
8. A large rectangular air valve according to claim 1, characterized in that the longitudinal frame assembly (5) comprises a longitudinal frame (501), and the left half shaft (6) and the longitudinal frame (501) and the right half shaft (7) and the longitudinal frame (501) are all rotatably connected through copper sleeves (503); the copper sleeve (503) is positioned in the stop block (502), and the stop block (502) is fixed on the longitudinal frame (501); a valve seat (504) is arranged between the vertical frame (501) and the blade (4); the vertical frame (501) is a sheet metal bending piece, and bolt holes and shaft holes are formed in the vertical frame (501).
9. A large rectangular air valve according to claim 1, characterized in that the left half shaft (6) and the right half shaft (7) are fixedly connected by a coupling (8).
10. A large rectangular damper according to claim 1, characterized in that the longitudinal frame assembly (5) is provided with a stop (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321597550.7U CN220151913U (en) | 2023-06-21 | 2023-06-21 | Large rectangular air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321597550.7U CN220151913U (en) | 2023-06-21 | 2023-06-21 | Large rectangular air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220151913U true CN220151913U (en) | 2023-12-08 |
Family
ID=89008547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321597550.7U Active CN220151913U (en) | 2023-06-21 | 2023-06-21 | Large rectangular air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220151913U (en) |
-
2023
- 2023-06-21 CN CN202321597550.7U patent/CN220151913U/en active Active
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