CN210951761U - Air exhaust pipe for preventing air return - Google Patents
Air exhaust pipe for preventing air return Download PDFInfo
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- CN210951761U CN210951761U CN201922113789.2U CN201922113789U CN210951761U CN 210951761 U CN210951761 U CN 210951761U CN 201922113789 U CN201922113789 U CN 201922113789U CN 210951761 U CN210951761 U CN 210951761U
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- check valve
- elastic sealing
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Abstract
The utility model provides an anti-return air exhaust pipe, which comprises an air cap, an elastic sealing ring, a check valve mounting pipe, an external thread pipe, an internal thread pipe and a flange; the elastic sealing ring is divided into a mounting ring and an extension ring, and the extension ring extends towards the end where the flange is located; the outer ring of the mounting ring is provided with a second bolt hole, and the inner ring is provided with a clamping groove; the smooth pipe wall of the check valve mounting pipe is provided with convex edges; the other end of the smooth pipe wall is connected with a convex thin wall, the other end of the convex thin wall is a contact wall, and a pin hole is formed at one end of the contact wall; the middle position of the check valve body protrudes towards one side of the contact wall and is sleeved with a gasket; one end of the check valve is connected with a pin shaft, and the body at the other end is provided with a weight block. In the utility model, after the elastic sealing ring penetrates out of the wall hole, the inner threaded pipe is pulled towards the indoor side, so that the elastic sealing ring is closely attached to the outer wall surface, and then the flange is installed to fix the air return preventing exhaust pipe; especially for high-rise buildings, the safety of the installation workers is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of air pipe, specifically belong to an air exhaust pipe of preventing returning air.
Background
When kitchen oil fume, a fresh air purifier or an indoor toilet exhausts to the outside, a through-wall exhaust duct is used, for example, a Chinese patent 201822023064.X which is already applied by the applicant, a novel air return preventing exhaust duct has obtained good market reverberation and is good in sales volume;
however, the exhaust duct in the prior art has the following defects when in use: when the high-rise building is installed, partial components also need to be installed outdoors by workers, so that personal risk factors are increased; during installation, pipeline installation holes need to be formed in the wall, and after the installation is finished, the installation holes need to be sealed, so that the process is complicated; furthermore, although the wall-through exhaust ducts in the prior art are all equipped with check valves, the working state of the check valves cannot ensure a complete sealing effect.
Disclosure of Invention
The utility model provides an air exhaust pipe prevents return air to reach easy to assemble, increase sealing performance's purpose.
The technical scheme of the utility model: an air exhaust pipe for preventing air return is characterized by comprising an air cap, an elastic sealing ring, a check valve mounting pipe, an external threaded pipe, an internal threaded pipe and a flange;
a groove sunken towards the inner cavity of the hood is formed in the wall of the hood, and a first bolt hole is formed in the groove;
the elastic sealing ring is divided into a mounting ring and an extension ring, the extension ring and the mounting ring are integrally formed, and the extension ring extends towards the end where the flange is located; the outer ring of the mounting ring is provided with a second bolt hole, and the inner ring is provided with a clamping groove;
the pipe wall of the check valve mounting pipe is provided with a section of external thread, and the smooth pipe wall is provided with a convex edge; the other end of the smooth pipe wall is connected with a bulge thin wall, a third bolt hole is formed in the bulge thin wall, the other end of the bulge thin wall is a check valve contact wall, and a pin hole is formed in one end of the contact wall; in the contact wall, the width of the pipe wall provided with the pin hole end is smaller than that of the pipe wall on the other side, so that the contact surface of the contact wall and the check valve is an inclined plane; the middle position of the check valve body protrudes towards one side of the contact wall, a gasket is sleeved on the protrusion, and the protrusion is in contact with the contact wall with the gasket after being closed; one end of the check valve is connected with a pin shaft, and the body at the other end is provided with a weight block;
an elastic sealing ring is sleeved and mounted on the check valve mounting pipe, so that a clamping groove of the elastic sealing ring is matched with a convex edge on the smooth pipe wall; then, sleeving a hood on one side of the check valve mounting pipe, which is provided with the check valve; bolts penetrate through the first bolt holes, the third bolt holes and the second bolt holes to be fixed;
the outer wall of the external thread pipe is external thread, and the inner wall of one end of the external thread pipe is provided with internal thread; the inner wall of the internal thread pipe is an internal thread, and the outer wall of one end of the internal thread pipe is provided with an external thread;
the internal thread of the external thread pipe is matched and fixedly arranged with the external thread of the check valve mounting pipe; the flange is provided with an internal thread which is connected to the external thread of the internal thread pipe;
the flange is provided with a sealing groove, and a sealing rubber strip is installed on the sealing groove.
Furthermore, the circle center of the second bolt hole is positioned on the outer ring of the mounting ring and protrudes out of the outer ring to form a reinforcing block.
Furthermore, the clamping groove is a cuboid groove, and the convex edge is a cuboid bulge.
Furthermore, the clamping groove, the convex edge, the first bolt hole, the second bolt hole and the third bolt hole are respectively three.
Furthermore, the pin hole is an opening hole, and the width of the opening is smaller than the diameter of the pin shaft.
The utility model has the advantages that:
in the utility model, after the blast cap, the elastic sealing ring, the check valve mounting pipe, the external thread pipe and the internal thread pipe are assembled, the blast cap, the elastic sealing ring, the check valve mounting pipe, the external thread pipe and the internal thread pipe pass through the wall body, after the elastic sealing ring penetrates out of a wall hole, the internal thread pipe is pulled towards the indoor side, so that the elastic sealing ring is tightly pasted on the outer wall surface, and then the air return preventing exhaust pipe is fixed by installing a flange; especially for high-rise buildings, the installation mode can be completed only by indoor operation, and the safety of installation workers is ensured. Furthermore, the elastic sealing ring in the utility model can tightly seal the wall hole; the inclined plane structure of check valve contact wall department combines with check valve body shape, makes the utility model discloses an air exhaust pipe prevents that return air's leakproofness is better.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the hood of the present invention;
fig. 3 is a schematic structural view of the elastic sealing ring of the present invention;
FIG. 4 is a schematic view of the check valve mounting tube of the present invention;
FIG. 5 is a schematic view of the check valve of the present invention;
FIG. 6 is a schematic structural view of the check valve and the gasket of the present invention after installation;
FIG. 7 is a schematic view of the check valve mounting pipe and check valve mounting structure of the present invention;
fig. 8 is a schematic view of the flange structure of the present invention;
fig. 9 is a schematic structural view of embodiment 2 of the present invention.
In the figure: 1. a hood; 1.1, a first bolt hole; 2. an elastic sealing ring; 2.1, mounting a ring; 2.2, extending the ring; 2.3, a second bolt hole; 2.4, a clamping groove; 3. a check valve mounting tube; 3.1, external threads; 3.2, convex edges; 3.3, protruding thin walls; 3.4, a bolt half hole; 3.5, contact wall; 3.6, pin holes; 4. an externally threaded tube; 5. An internally threaded tube; 6. a flange; 7. a check valve; 7.1, a pin shaft; 7.2, a weight block; 7.3, a gasket;
Detailed Description
An air exhaust pipe for preventing air return is characterized by comprising an air cap 1, an elastic sealing ring 2, a check valve mounting pipe 3, an external threaded pipe 4, an internal threaded pipe 5 and a flange 6;
a groove which is sunken towards the inner cavity of the hood is formed in the wall of the hood 1, and a first bolt hole 1.1 is formed in the groove; the installation and connection are firmer, and the operation is convenient during the connection;
the elastic sealing ring 2 is divided into a mounting ring 2.1 and an extension ring 2.2, the extension ring 2.2 and the mounting ring 2.1 are integrally formed, and the extension ring 2.2 extends towards the end where the flange 6 is located; the outer ring of the mounting ring 2.1 is provided with a second bolt hole 2.3, and the inner ring is provided with a clamping groove 2.4;
a section of external thread 3.1 is formed on the pipe wall of the check valve mounting pipe 3; convex ridges 3.2 are formed on the smooth pipe wall; the other end of the smooth pipe wall is connected with a convex thin wall 3.3, a bolt half hole 3.4 is formed at the edge of the convex thin wall 3.3, the other end of the convex thin wall 3.3 is a check valve contact wall 3.5, and a pin hole 3.6 is formed at the upper end of the contact wall 3.5; in the contact wall 3.5, the width of the pipe wall at the end provided with the pin hole 3.6 is smaller than that of the pipe wall at the other side, so that the contact surface of the contact wall 3.5 and the check valve 7 is an inclined plane; the middle position of the check valve 7 body protrudes towards one side of the contact wall, a gasket 7.3 is sleeved on the protrusion, and the protrusion, the gasket 7.3 and the contact wall 3.5 are in contact after the check valve is closed; one end of the check valve 7 is connected with a pin shaft 7.1, and a weight block 7.2 is arranged on the other end body;
the check valve installation pipe 3 is sleeved with the elastic sealing ring 2, so that a clamping groove 2.4 of the elastic sealing ring 2 is matched with a convex edge 3.2 on the smooth pipe wall; then, the blast cap 1 is sleeved on one side of the check valve installation pipe 3, which is provided with the check valve 7; bolts penetrate through the first bolt holes 1.1 and the bolt half holes 3.4 to be fixed with the second bolt holes 2.3;
the outer wall of the external thread pipe 4 is external thread, and one end of the inner wall is provided with internal thread; the inner wall of the internal thread pipe 5 is an internal thread, and the outer wall of one end of the internal thread pipe is provided with an external thread;
the internal thread of the external thread pipe 4 is matched and fixedly arranged with the external thread 3.1 of the check valve mounting pipe 3; the internal threaded pipe 5 is connected and fixed on the external threaded pipe, and the flange 6 is provided with internal threads and is connected on external threads of the internal threaded pipe;
the flange 6 is provided with a sealing groove 6.1 for installing a sealing rubber strip.
The circle center of the second bolt hole 2.3 is positioned on the outer ring of the mounting ring 2.1 and protrudes out of the outer ring 2.1 to form a reinforcing block.
The clamping groove 2.4 is a cuboid groove, and the convex edge 3.2 is a cuboid bulge.
The clamping grooves 2.4, the convex ribs 3.2, the first bolt holes 1.1, the bolt half holes 3.4 and the second bolt holes 2.3 are three respectively.
The pin hole 3.6 is an opening hole, the width of the opening is smaller than the diameter of the pin shaft 7.1, the pin shaft 7.1 is clamped and installed in the pin hole 3.6 during installation and is movably fixed, and the installation process is facilitated.
The utility model is convenient to install, especially for high-rise buildings, the outdoor installation is not needed, after the hole is opened on the indoor wall, the anti-return air exhaust pipe is pushed to the outdoor side indoors, then the elastic sealing ring is worn out to reach the outdoor, after the anti-return air exhaust pipe is pulled back, the elastic sealing ring is automatically opened, and the elastic sealing ring is clamped on the opening; not only easy to assemble, sealing performance is also better.
Example 2
When the utility model is applied to the glass of a window, the external thread pipe 4 and the internal thread pipe 5 are saved, the flange 6 is directly connected to the check valve mounting pipe 3 for use, the outdoor mounting is also not needed, after the hood, the elastic sealing ring and the check valve mounting pipe are mounted, the glass is worn out and pulled back, the elastic sealing ring is tightly attached to the window, and then the flange is mounted, thus the mounting of the utility model is completed; therefore, the safety of installation personnel is guaranteed.
Claims (5)
1. An air exhaust pipe for preventing air return is characterized by comprising an air cap, an elastic sealing ring, a check valve mounting pipe, an external threaded pipe, an internal threaded pipe and a flange;
a groove sunken towards the inner cavity of the hood is formed in the wall of the hood, and a first bolt hole is formed in the groove;
the elastic sealing ring is divided into a mounting ring and an extension ring, the extension ring and the mounting ring are integrally formed, and the extension ring extends towards the end where the flange is located; the outer ring of the mounting ring is provided with a second bolt hole, and the inner ring is provided with a clamping groove;
the pipe wall of the check valve mounting pipe is provided with a section of external thread, and the smooth pipe wall is provided with a convex edge; the other end of the smooth pipe wall is connected with a bulge thin wall, a third bolt hole is formed in the bulge thin wall, the other end of the bulge thin wall is a check valve contact wall, and a pin hole is formed in one end of the contact wall; in the contact wall, the width of the pipe wall provided with the pin hole end is smaller than that of the pipe wall on the other side, so that the contact surface of the contact wall and the check valve is an inclined plane; the middle position of the check valve body protrudes towards one side of the contact wall, a gasket is sleeved on the protrusion, and the protrusion is in contact with the contact wall with the gasket after being closed; one end of the check valve is connected with a pin shaft, and the body at the other end is provided with a weight block;
an elastic sealing ring is sleeved and mounted on the check valve mounting pipe, so that a clamping groove of the elastic sealing ring is matched with a convex edge on the smooth pipe wall; then, sleeving a hood on one side of the check valve mounting pipe, which is provided with the check valve; bolts penetrate through the first bolt holes, the third bolt holes and the second bolt holes to be fixed;
the outer wall of the external thread pipe is external thread, and the inner wall of one end of the external thread pipe is provided with internal thread; the inner wall of the internal thread pipe is an internal thread, and the outer wall of one end of the internal thread pipe is provided with an external thread;
the internal thread of the external thread pipe is matched and fixedly arranged with the external thread of the check valve mounting pipe; the flange is provided with an internal thread which is connected to the external thread of the internal thread pipe;
the flange is provided with a sealing groove, and a sealing rubber strip is installed on the sealing groove.
2. The air exhaust pipe of claim 1, wherein the center of the second bolt hole is located on the outer ring of the mounting ring, and a reinforcing block is formed by protruding the outer ring.
3. The air return prevention and exhaust duct of claim 1, wherein the clamping groove is a rectangular groove, and the protruding edge is a rectangular protrusion.
4. The air exhaust pipe of claim 1, wherein there are three locking grooves, protruding ridges, first bolt holes, second bolt holes and third bolt holes.
5. The air exhaust pipe of claim 1, wherein the pin hole is an opening hole, and the width of the opening is smaller than the diameter of the pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922113789.2U CN210951761U (en) | 2019-12-02 | 2019-12-02 | Air exhaust pipe for preventing air return |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922113789.2U CN210951761U (en) | 2019-12-02 | 2019-12-02 | Air exhaust pipe for preventing air return |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210951761U true CN210951761U (en) | 2020-07-07 |
Family
ID=71372882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922113789.2U Active CN210951761U (en) | 2019-12-02 | 2019-12-02 | Air exhaust pipe for preventing air return |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210951761U (en) |
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2019
- 2019-12-02 CN CN201922113789.2U patent/CN210951761U/en active Active
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