CN211447632U - Prefabricated closing device of metal tuber pipe - Google Patents
Prefabricated closing device of metal tuber pipe Download PDFInfo
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- CN211447632U CN211447632U CN201922248457.5U CN201922248457U CN211447632U CN 211447632 U CN211447632 U CN 211447632U CN 201922248457 U CN201922248457 U CN 201922248457U CN 211447632 U CN211447632 U CN 211447632U
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Abstract
The utility model relates to a prefabricated closing device of metal tuber pipe, including first flange and second flange, first flange includes first flange body, and first flange body one end sets up first fixed part, and the first flange body other end is equipped with first fastening portion, and first flange body central point puts and is equipped with the spliced eye, and the spliced eye sets up with first flange body is concentric, is equipped with the guide way on the first flange body inside wall, and the guide way communicates with the spliced eye; the second flange comprises a second flange body, a second fixing portion is arranged at one end of the second flange body, an inserting table is arranged at the other end of the second flange body and is arranged in a step shape with the second flange body, a positioning lug is arranged on the outer side wall of the inserting table, a second fastening portion is arranged on the outer side wall of the second flange body, and the first fastening portion is fixedly connected with the second fastening portion. This device can be sealed the tuber pipe tightly, and can be durable for a long time, improves the assembly efficiency that the tuber pipe is connected when guaranteeing the effect of sealing of tuber pipe.
Description
Technical Field
The utility model relates to an air pipe technical field in the building, specific prefabricated closing device of metal tuber pipe that says so.
Background
At present, the building industry is in a high-speed development stage, systems in buildings are more and more complex, and domestic air-conditioning ventilation pipelines can be divided into the following parts according to purposes: the air supply and return pipe of the purification system, the industrial air supply and exhaust ventilation pipe, the central air-conditioning ventilation pipe, the mining gas drainage pipe, the environmental protection system air suction and exhaust pipe and the like, and the connection and application between the air pipes are common in the installation and use process.
At present, the connection seal of the air pipe and the air pipe mainly has two forms of a thin steel plate flange and an angle steel flange, and the connection strength of the thin steel plate flange air pipe is poor and the sealing performance is poor; the angle steel flange manufacturing process is completed manually, the production efficiency is low, the manufacturing quality cannot be guaranteed, the angle steel flange is welded to an air pipe on site and has the defects that air pollution is serious, a circular air pipe flange cannot be manufactured and the like, and the angle steel flange can fall off and be sealed and unsealed after being used for a long time, so that partial air leakage can be caused during use. In addition, the flange connection tuber pipe commonly used at present is adopted, and the flange assembly hole alignment on two tuber pipes is assembled, and the assembly is wasted time and energy, especially to the great metal tuber pipe of bore, wants to align the assembly hole more difficult, waste time and energy.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem not enough, provide a prefabricated closing device of metal tuber pipe, this device can be sealed tightly with the tuber pipe, and can be durable for a long time, improves the assembly efficiency that the tuber pipe is connected when guaranteeing the effect of sealing of tuber pipe.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a prefabricated sealing device for a metal air pipe comprises a first flange and a second flange, wherein the first flange comprises a first flange body, one end of the first flange body is provided with a first fixing part, the first fixing part comprises a first connecting cylinder and a second connecting cylinder, a first clamping cavity is formed between the first connecting cylinder and the second connecting cylinder, the end part of the first air pipe can be inserted into the first clamping cavity to fix the first air pipe, the other end of the first flange body is provided with a first fastening part, the center of the first flange body is provided with an inserting hole, the inserting hole and the first flange body are concentrically arranged, the inner side wall of the first flange body is provided with a guide groove, and the guide groove is communicated with the inserting hole; the second flange comprises a second flange body, a second fixing part is arranged at one end of the second flange body, the second fixing part comprises a third connecting cylinder and a fourth connecting cylinder, a second clamping cavity is formed between the third connecting cylinder and the fourth connecting cylinder, the end part of a second air pipe can be inserted into the second clamping cavity to be fixed, an inserting table is arranged at the other end of the second flange body, the outer side wall of the inserting table and the outer side wall of the second flange body are arranged in a step shape, a positioning lug is arranged on the outer side wall of the inserting table, and a second fastening part is arranged on the outer side wall of the second flange body; the plug-in platform can be inserted into the plug-in hole, the positioning lug can stretch into the guide groove to be positioned, and the first fastening portion and the second fastening portion are connected in a clinging mode and can be detached and fixed.
Further, the guide way includes first guide part and second guide part, first guide part sets up along first tuber pipe length direction's axis, the second guide part sets up in first guide part one end and second guide part and first guide part intercommunication.
Further, the second guide part is arranged in an arc shape.
Further, set up first connecting hole in the first tight portion, set up second connecting hole and limiting plate in the second tight portion, the limiting plate can be used for second flange and first flange to rotate spacing when assembling, first tight portion and second tight portion are through passing the fastening bolt fixed connection of first connecting hole and second connecting hole.
Furthermore, the guide groove is provided with two or more than two, the first fastening portion is provided with two or more than two, and the guide groove and the first fastening portion are arranged on the first flange body in a crossing manner.
Further, the outer diameter of the first connecting cylinder is larger than that of the first flange body; the inner diameter of the second connecting cylinder is smaller than that of the first flange body.
Further, the outer diameter of the third connecting cylinder is larger than the outer diameter of the second flange body, and the inner diameter of the fourth connecting cylinder is smaller than the inner diameter of the second flange body.
Furthermore, the inner diameter of the inserting table is smaller than that of the fourth connecting cylinder, the outer diameter of the inserting table is the same as that of the first flange body, and the inner diameter of the inserting table is the same as that of the second connecting cylinder.
Furthermore, one end of the first flange body is provided with a first fixing part, and the port of the other end of the first flange body is closed, or one end of the second flange body is provided with a second fixing part, and the port of the other end of the second flange body is closed.
Further, gaskets are disposed in the first and second clamping cavities 302c and 402 c.
The utility model has the advantages that:
1. the utility model discloses a prefabricated closing device of metal tuber pipe, it is rational in infrastructure, through prefabricated first flange, second flange, realize the quick connection with the tuber pipe, set up the guide way on first flange body inside wall, be convenient for fix a position and guide when assembling the second flange, the leakproofness of being connected when also having guaranteed first flange and second flange contact, first fixed part on the first flange and second fixed part on the second flange can both be sealed the tuber pipe assembly fast simultaneously, the leakproofness and the agility of metal tuber pipe port connection have been improved greatly;
2. the utility model discloses prefabricated closing device of metal tuber pipe, the assembly is swift, connects reliable and stable, and the suitability is strong, guarantees sealing effect and increase of service life of tuber pipe.
Drawings
Fig. 1 is a schematic diagram of the explosion structure of the present invention.
Fig. 2 is a schematic view of the assembled three-dimensional structure of the present invention.
Fig. 3 is a schematic view of the assembly plane structure of the present invention.
Fig. 4 is a schematic structural view of the first flange of the present invention.
Fig. 5 is a schematic perspective view of a first flange of the present invention.
Fig. 6 is another schematic perspective view of the first flange of the present invention.
Fig. 7 is a schematic structural view of a second flange of the present invention.
Fig. 8 is a schematic perspective view of a second flange according to the present invention.
Fig. 9 is another schematic perspective view of the second flange according to the present invention.
Fig. 10 is a schematic perspective view of the first flange and the second flange of the present invention when assembled.
Fig. 11 is a schematic view of the assembled three-dimensional structure of the first flange and the second flange of the present invention.
The labels in the figure are: 1. the first air duct, 2, the second air duct, 3, the first flange, 301, the first flange body, 302, the first fixing portion, 302a, the first connecting cylinder, 302b, the second connecting cylinder, 302c, the first clamping cavity, 303, the guide groove, 303a, the first guide portion, 303b, the second guide portion, 304, the first fastening portion, 304a, the first connecting hole, 305, the plug hole, 4, the second flange, 401, the second flange body, 402, the second fixing portion, 402a, the third connecting cylinder, 402b, the fourth connecting cylinder, 402c, the second clamping cavity, 403, the positioning bump, 404, the second fastening portion, 404a, the second connecting hole, 404b, the limiting plate, 405, the plug platform, 5, the fastening bolt.
Detailed Description
In order to make the technical means, the purpose and the efficacy of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.
It should be noted that all terms used in the present invention for directional and positional indication, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "transverse", "longitudinal", "center", etc. are used only for explaining the relative positional relationship, connection conditions, etc. between the respective members in a certain specific state (as shown in the drawings), and are only for convenience of description of the present invention, and do not require that the present invention must be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
As shown in fig. 1-11, the utility model discloses a prefabricated closing device of metal tuber pipe, including first flange 3 and second flange 4.
The first flange 3 includes a first flange body 301, a first fixing portion 302 is arranged at one end of the first flange body 301, the first fixing portion 302 includes a first connecting cylinder 302a and a second connecting cylinder 302b, a first clamping cavity 302c is formed between the first connecting cylinder 302a and the second connecting cylinder 302b, the first clamping cavity 302c enables the end portion of the first air pipe 1 to be inserted into and fix the port of the first air pipe, the first fixing portion 302 is fixedly connected with the first air pipe 1, a first fastening portion 304 is arranged at the other end of the first flange body 301, a first connecting hole 304a is arranged on the first fastening portion 304, an insertion hole 305 is arranged in the middle of the first flange body 301, the center of the insertion hole 305 is concentrically arranged with the center of the first flange body 301, a guide groove 303 is arranged on the inner side wall of the first flange body 301, and the guide groove 303 is communicated with the insertion hole 305.
The second flange 4 comprises a second flange body 401, one end of the second flange body 401 is provided with a second fixing part 402, the second stationary portion 402 includes a third connector barrel 402a and a fourth connector barrel 402b, a second clamping cavity 402c is formed between the third connector barrel 402a and the fourth connector barrel 402b, the second clamping chamber 402c allows the end of the second air duct 2 to be inserted into and fixed, the second fixing portion 402 is fixedly connected to the second air duct 2, the other end of the second flange body 401 is provided with an inserting table 405, the outer side wall of the inserting table 405 and the outer side wall of the second flange body 401 are arranged in a step shape, the outer side wall of the insertion platform 405 is provided with a positioning lug 403, the outer side wall of the second flange body 401 is provided with a second fastening part 404, the second fastening portion 404 is provided with a second coupling hole 404a and a stopper plate 404b, the limiting plate 404b can be used for limiting the rotation of the second flange 4 and the first flange 3.
The inserting table 405 can be inserted into the inserting hole 305 and can slide in a rotating manner, the positioning lug 403 can extend into the guide groove 303 to perform sliding positioning, and the first fastening portion 304 and the second fastening portion 404 are fixedly connected through the fastening bolt 5 passing through the first connecting hole 304a and the second connecting hole 404 a.
This arrangement discloses a specific structure for fixedly connecting the first fixing portion 302 to the first air duct 1, and the first clamping cavity 302c is formed between the first connecting cylinder 302a and the second connecting cylinder 302b, so that the first air duct 1 inserted into the first clamping cavity 302c can be fixed by a rivet provided on the outer side of the first connecting cylinder 302a, can be fixed by a rivet provided on the inner side of the second connecting cylinder 302b, and can also be fixed by a rivet provided on the second connecting cylinder 302b after penetrating through the first connecting cylinder 302 a. The utility model discloses a fixed connection of the remaining second tuber pipe 2 of second fixed part 402 is also as above.
When two metal air ducts need to be connected in a sealing manner, firstly, the insertion platform 405 on the second flange 4 is inserted into the insertion hole 305 on the first flange 3 and pushed inwards, then the positioning lug 403 on the insertion platform 405 is inserted into the guide groove 303 on the first flange body 301 by rotating the second flange 4, the inward pushing is continued until the first fastening part 304 is tightly attached to the second fastening part 404, and then the first fastening part 304 and the second fastening part 404 are detachably and fixedly connected through insertion, clamping or a third connecting piece. After the prefabricated first flange 3 and the prefabricated second flange 4 are assembled, the first fixing portion 302 of the prefabricated first flange 3 is fixedly connected with the end portion of the first air pipe 1, the second fixing portion 402 of the prefabricated second flange 4 is fixedly connected with the end portion of the second air pipe 2, and the first flange and the second flange can be fixedly connected with the metal air pipe through rivets.
The utility model discloses rational in infrastructure, through prefabricated first flange and second flange, realize with the high-speed joint of tuber pipe, the guide way that sets up on first flange body inside wall is convenient for fix a position and lead when assembling the second flange, the leakproofness of being connected when also having guaranteed first flange and second flange contact, has improved the leakproofness and the agility that the metal tuber pipe port is connected greatly. Simultaneously the utility model discloses a couple together first tuber pipe and second tuber pipe through first fastening portion 304 and second fastening portion 404 after assembling first flange and second flange, under the leakproofness of guaranteeing the connection assembly, do not have the restriction to the mounted position, need not remove or rotate the tuber pipe position and just can carry out the erection joint, use manpower sparingly greatly, material resources and assemble duration, especially to the metal tuber pipe of great bore, adopt the utility model discloses a device carries out sealing connection and has more advantages.
Preferably, as a preferred example of the present invention, the guide groove 303 includes a first guide portion 303a and a second guide portion 303b, the first guide portion 303a is disposed along a central axis of the first air duct 1 in the length direction, the second guide portion 303b is disposed on the inner side surface of the first flange body 301, one end of the second guide portion 303b is communicated with the first guide portion 303a, and the other end of the second guide portion 303b extends toward the first fixing portion 302. This arrangement causes the positioning projections 403 on the insertion stage 405 to first push inward along the first guide portions 303a arranged linearly, and then the insertion stage 405 is slid into the second guide portions 303b at one end of the first guide portions 303a by rotating the second flange 4, and the first flange 3 and the second flange 4 are gradually brought into close contact with each other while the positioning projections 403 are gradually slid to the end of the guide grooves 303. When this setting had guaranteed first flange and second flange assembly, the convenience and the reliability that locating lug and guide way were fixed a position and were led.
Preferably, as a preferable example of the present invention, the second guide portion 303b is provided in an arc shape. This arrangement enables the second flange 4 to continue to advance as the positioning lug 403 slides rotationally within the second guide 303 b. This setting has further improved convenient new and the reliability when first flange and second flange be assembled between/be connected to avoid the tuber pipe to receive external force effect and lead to the location lug to outwards roll back when using, guarantee first fastening with the fastening nature that second fastening is connected.
Preferably, as a preferred example of the present invention, the guide groove 303 is provided in two or more, the first fastening portion 304 is provided in two or more, and the guide groove 303 and the first fastening portion 304 are disposed in a cross shape on the first flange body 301. Similarly, two or more positioning protrusions 403 and two or more second fastening portions 404 are also provided, and the projections of the positioning protrusions 403 and the second fastening portions 404 on the second flange body 401 are arranged in a cross manner. In this embodiment, 3 guide grooves 303, 3 first fastening portions 304, 3 positioning protrusions 403, and 3 second fastening portions 404 are provided. As shown in fig. 8 and 9, when the positioning protrusion 403 on the insertion stage 405 is aligned with the first guide portion 303a, the first connection hole 304a on the first fastening portion 304 and the second connection hole 404a on the second fastening portion 404 are in a misaligned state, and the second fastening portion 404 further approaches the first fastening portion 304 when the positioning protrusion 403 continues to slide along the arc-shaped second guide portion 303b by rotating the second flange 4, and the first connection hole 304a on the first fastening portion 304 and the second connection hole 404a on the second fastening portion 404 are concentrically arranged when the limiting plate 404b is arranged on one side of the second fastening portion 404 to contact the first fastening portion 304. The arrangement further ensures the reliability of guiding and the stability of connection when the first flange is connected with the second flange.
Preferably, as a preferred example of the present invention, the outer diameter of the first connecting cylinder 302a is larger than the outer diameter of the first flange body 301; the second connector barrel 302b has an inner diameter smaller than that of the first flange body 301. This setting has guaranteed the intensity of first fixed part 302, has further guaranteed the reliability that first fixed part 302 is connected with first tuber pipe 1. Similarly, the outer diameter of the third connecting cylinder 402a is larger than the outer diameter of the second flange body 401, and the inner diameter of the fourth connecting cylinder 402b is smaller than the inner diameter of the second flange body 401.
Preferably, as a preferred example of the present invention, a sealing gasket is provided in the first clamping chamber 302c and the second clamping chamber 402 c. This arrangement ensures the sealing property of the connection between the first fixing portion 302 and the first duct 1, and the connection between the second fixing portion 402 and the second duct 2.
Preferably, as a preferred example of the present invention, the inner diameter of the insertion stage 405 is smaller than the inner diameter of the fourth connecting cylinder 402b, the outer diameter of the insertion stage 405 is the same as the inner diameter of the first flange body 301, and the inner diameter of the insertion stage 405 is the same as the inner diameter of the second connecting cylinder 302 b. This arrangement further ensures the tightness of the connection of the first flange 3 to the second flange 4.
Example 2
As an example of the present invention, the first flange body 301 one end is provided with the first fixing portion 302 as described above, the other end port is closed, the second flange body 401 one end is provided with the second fixing portion (402) as described above, the other end port is closed, and other structures are the same as embodiment 1, and this setting can be used for both the connection of the metal air duct and the closing of the metal air duct port.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The utility model discloses the spare part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description of description and drawing, and the concrete connected mode of each part does not explain all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery and equipment all adopt conventional model among the prior art, and equipment circuit connection adopts conventional connected mode among the prior art in addition, and the details are not repeated here, and the content that does not make detailed description in this description belongs to the prior art that technical staff in this field knows.
Claims (10)
1. The utility model provides a prefabricated closing device of metal tuber pipe which characterized in that: the flange comprises a first flange (3) and a second flange (4), wherein the first flange (3) comprises a first flange body (301), one end of the first flange body (301) is provided with a first fixing part (302), the first fixing part (302) comprises a first connecting cylinder (302a) and a second connecting cylinder (302b), a first clamping cavity (302c) is formed between the first connecting cylinder (302a) and the second connecting cylinder (302b), the first clamping cavity (302c) can enable the end part of a first air pipe (1) to be inserted and fixed, the other end of the first flange body (301) is provided with a first fastening part (304), the center of the first flange body (301) is provided with an inserting hole (305), the inserting hole (305) and the first flange body (301) are arranged concentrically, the inner side wall of the first flange body (301) is provided with a guide groove (303), the guide groove (303) is communicated with the plug hole (305); the second flange (4) comprises a second flange body (401), one end of the second flange body (401) is provided with a second fixing part (402), the second fixing part (402) comprises a third connecting cylinder (402a) and a fourth connecting cylinder (402b), a second clamping cavity (402c) is formed between the third connecting cylinder (402a) and the fourth connecting cylinder (402b), the second clamping cavity (402c) can enable the end part of the second air pipe (2) to be inserted and fixed, the other end of the second flange body (401) is provided with an inserting table (405), the outer side wall of the inserting table (405) and the outer side wall of the second flange body (401) are arranged in a step shape, the outer side wall of the inserting table (405) is provided with a positioning lug (403), and the outer side wall of the second flange body (401) is provided with a second fastening part (404); the plug-in table (405) can be plugged into the plug-in hole (305), the positioning lug (403) can extend into the guide groove (303) for positioning, and the first fastening part (304) and the second fastening part (404) are connected in a clinging manner and can be detachably fixed.
2. A prefabricated sealing device for a metal air duct according to claim 1, characterized in that: the guide groove (303) comprises a first guide part (303a) and a second guide part (303b), the first guide part (303a) is arranged along the central axis of the length direction of the first air duct (1), the second guide part (303b) is arranged at one end of the first guide part (303a), and the second guide part (303b) is communicated with the first guide part (303 a).
3. A prefabricated sealing device for a metal air duct according to claim 2, wherein: the second guide part (303b) is arranged in an arc shape.
4. A prefabricated sealing device for a metal air duct according to claim 1, characterized in that: set up first connecting hole (304a) on first fastening portion (304), set up second connecting hole (404a) and limiting plate (404b) on second fastening portion (404), limiting plate (404b) can be used for second flange (4) and first flange (3) spacing when rotating the equipment, first fastening portion (304) and second fastening portion (404) are through passing fastening bolt (5) fixed connection of first connecting hole (304a) and second connecting hole (404 a).
5. A preformed closure for a metal air hose according to any of claims 1 to 4, wherein: the guide groove (303) is provided with two or more than two, the first fastening part (304) is provided with two or more than two, and the guide groove (303) and the first fastening part (304) are arranged on the first flange body (301) in a crossing mode.
6. A prefabricated sealing device for a metal air duct according to claim 1, characterized in that: the outer diameter of the first connecting cylinder (302a) is larger than that of the first flange body (301); the inner diameter of the second connecting cylinder (302b) is smaller than that of the first flange body (301).
7. A prefabricated sealing device for a metal air duct according to claim 1, characterized in that: the third connecting cylinder (402a) has an outer diameter larger than that of the second flange body (401), and the fourth connecting cylinder (402b) has an inner diameter smaller than that of the second flange body (401).
8. A prefabricated sealing device for a metal air hose according to claim 1 or 7, wherein: the inner diameter of the insertion platform (405) is smaller than that of the fourth connecting cylinder (402b), the outer diameter of the insertion platform (405) is the same as that of the first flange body (301), and the inner diameter of the insertion platform (405) is the same as that of the second connecting cylinder (302 b).
9. A prefabricated sealing device for a metal air duct according to claim 1, characterized in that: one end of the first flange body (301) is provided with a first fixing part (302), and the port of the other end of the first flange body is closed, or one end of the second flange body (401) is provided with a second fixing part (402), and the port of the other end of the second flange body is closed.
10. A prefabricated sealing device for a metal air duct according to claim 1, characterized in that: sealing gaskets are arranged in the first clamping cavity (302c) and the second clamping cavity (402 c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922248457.5U CN211447632U (en) | 2019-12-12 | 2019-12-12 | Prefabricated closing device of metal tuber pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922248457.5U CN211447632U (en) | 2019-12-12 | 2019-12-12 | Prefabricated closing device of metal tuber pipe |
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| Publication Number | Publication Date |
|---|---|
| CN211447632U true CN211447632U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922248457.5U Active CN211447632U (en) | 2019-12-12 | 2019-12-12 | Prefabricated closing device of metal tuber pipe |
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| Country | Link |
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| CN (1) | CN211447632U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175573A (en) * | 2021-03-10 | 2021-07-27 | 浙江中创科技有限公司 | Quick dismounting joint for assembled smoke-proof air pipe flange |
-
2019
- 2019-12-12 CN CN201922248457.5U patent/CN211447632U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175573A (en) * | 2021-03-10 | 2021-07-27 | 浙江中创科技有限公司 | Quick dismounting joint for assembled smoke-proof air pipe flange |
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Address after: 030032 No. 8, Xinhua Road, Tanghuai Industrial Park, Shanxi transformation and comprehensive reform demonstration zone, Taiyuan City, Shanxi Province Patentee after: Shanxi Installation Group Co.,Ltd. Address before: 030021 No.8, Xinhua Road, Taiyuan Tanghuai Park, Shanxi comprehensive reform demonstration zone, Taiyuan City, Shanxi Province Patentee before: SHANXI INDUSTRIAL EQUIPMENT INSTALLATION GROUP Co.,Ltd. |
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