CN211739498U - Anti-downdraft smoke discharging joint for water heater - Google Patents
Anti-downdraft smoke discharging joint for water heater Download PDFInfo
- Publication number
- CN211739498U CN211739498U CN202020090743.3U CN202020090743U CN211739498U CN 211739498 U CN211739498 U CN 211739498U CN 202020090743 U CN202020090743 U CN 202020090743U CN 211739498 U CN211739498 U CN 211739498U
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- China
- Prior art keywords
- ring
- short pipe
- outer convex
- water heater
- smoke
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000007599 discharging Methods 0.000 title claims description 8
- 238000003466 welding Methods 0.000 claims abstract description 16
- 230000002265 prevention Effects 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000006049 ring expansion reaction Methods 0.000 abstract 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011378 penetrating method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
Abstract
The utility model discloses a downdraft prevention smoke exhaust joint of a water heater, which comprises an upper short pipe and a lower short pipe; the opening of the connecting port of the upper short pipe is expanded outwards along the pipe wall to form an outer convex annular wall, an inner ring expansion step is arranged in the outer pipe opposite to the outer convex annular wall, and an inner flanging is extended from the bottom edge of the outer convex annular wall; an outer convex ring extends from the upper pipe wall of the lower short pipe, the outer convex ring can be just inserted into the inner ring expansion step to be tightly and fixedly connected, the inner ring expansion step is limited and can not move upwards any more, the bottom edge of the outer convex ring is tightly wrapped by the inner flanging to prevent the outer convex ring from falling off, and therefore the lower short pipe is fixedly connected with the connecting port of the upper short pipe; the two parts of the product are fixedly connected without welding points, so that the smoke body is prevented from corroding welding points, and the service life of the anti-downdraft smoke exhaust joint is prolonged.
Description
Technical Field
The utility model relates to a hanging stove water heater part specifically is a prevent down draught and discharge fume joint for water heater.
Background
The anti-downdraft smoke exhaust joint of the existing wall-mounted boiler water heater is formed by connecting an upper short pipe and a lower short pipe, the upper short pipe and the lower short pipe are connected through spot welding, welding spots are connected through spot welding, the smoke exhaust of the anti-downdraft smoke exhaust joint is warm, sundries such as sulfides in a smoke body are easy to corrode the welding spots in the use process, the welding spots are gradually rusted, the smoke exhaust joint is quickly corroded in a large area and becomes hollow out to be damaged, and the anti-downdraft smoke exhaust joint is made to be shortened in service life.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a reasonable in design, simple structure, easy installation production, open/close effectual, connect between two parts fixedly and be solderless connection, prevent that the flue gas body from corroding the solder joint, improve and prevent down draught and smoke exhaust joint for water heater of down draught smoke exhaust joint life.
The technical scheme for solving the technical problems is as follows:
a prevent down-draught smoke discharging joint for water heater, its characterized in that: the anti-downdraft smoke exhaust joint comprises an upper short pipe and a lower short pipe; the upper short pipe is internally provided with a smoke discharge flue, the top of the upper short pipe is provided with a smoke discharge port, the bottom of the upper short pipe is provided with a connecting port, and the bottom edge of the upper short pipe extends to form an inward flange; an upward jacking limiting structure is protruded on the inner wall of the connecting port; the top of the lower short pipe is a smoke outlet, and the bottom of the lower short pipe is a smoke inlet; an outer convex ring extends from the upper section pipe wall of the lower short pipe; the upper section of the lower short pipe is inserted into the connecting port, the outer convex ring can be just inserted into the connecting port and is closely and fixedly connected with the connecting port, the outer convex ring is limited by the upward jacking limiting structure and cannot go upward any more, and the inner flanging tightly wraps the bottom edge of the outer convex ring to prevent the outer convex ring from falling off, so that the lower short pipe is fixedly connected with the connecting port of the upper short pipe.
The preferable technical scheme is further as follows: the lower short pipe comprises an upper ring part, an upper shrinking ring step, an outer convex ring, a lower shrinking ring step and a lower ring short pipe, the bottom of the lower ring short pipe is a smoke inlet, and the top of the upper ring part is a smoke outlet; the bottom edge of the upper ring piece is connected with the inner ring edge of the upper shrinking ring step, the outer ring edge of the upper shrinking ring step is connected with the upper ring edge of the outer convex ring, the lower ring edge of the outer convex ring is connected with the outer ring edge of the lower shrinking ring step, and the inner ring edge of the lower shrinking ring step is connected with the top ring edge of the lower ring short pipe; after the outer convex ring is inserted into the connector, the upper shrinkage ring step and the upward jacking limiting structure are limited, jacked and fixed to prevent the outer convex ring from going upward, and the inner flanging tightly wraps and fixes the edge of the lower shrinkage ring step to prevent the outer convex ring from falling off.
The preferable technical scheme is further as follows: an inner surrounding groove is formed between the upper ring piece and the upper short pipe through an upper shrinking ring step; the wall body of the upper shrinkage stage ring step is connected with a support lug, the support lug is movably connected with an anti-backflow cover in a penetrating mode through a pin, the anti-backflow cover covers the smoke outlet, the diameter of the anti-backflow cover is slightly larger than that of the smoke outlet, and the anti-backflow cover provides a cover opening space by utilizing the inner surrounding groove; the edge of the anti-downdraft cover touches the inner wall of the upper short pipe to stop opening the cover, the upward opening angle is less than 85 degrees, and the cover can fall down to close the smoke outlet by utilizing the gravity of the cover after the cover is opened.
The preferable technical scheme is further as follows: the upper short pipe is formed by loop welding or stretching integrally; the lower short pipe is formed by welding or stretching into a whole.
The preferable technical scheme is further as follows: the upper short pipe and the lower short pipe are made of stainless steel.
The preferable technical scheme is further as follows: the anti-backflow cover is an arc-shaped surface which is slightly convex downwards as a whole.
The preferable technical scheme is further as follows: the upper short pipe is small in the upper part and large in the lower part and is transited through a slope step.
The preferable technical scheme is further as follows: the height of the convex ring is 5 mm-2 cm.
The preferable technical scheme is further as follows: the upward jacking and limiting structure is an inward convex ring rib on the inner wall of the upper short pipe.
The preferable technical scheme is further as follows: and the top of the lower ring short pipe is provided with a surrounding groove which is arranged below and adjacent to the step of the lower contraction ring.
The utility model discloses a prevent down draught and discharge fume joint beneficial effect for water heater does: the upper short tube of the product is internally provided with a smoke discharge flue, the top is provided with a smoke discharge port, the bottom is provided with a connecting port, and the bottom edge of the product extends to form an inward flange; a raised upward jacking limiting structure is arranged on the inner wall of the connecting port; an outer convex ring extends from the upper pipe wall of the lower short pipe, the outer convex ring can be just inserted into the connecting port to be tightly and fixedly connected, the outer convex ring can not move upwards through the limitation of the upward jacking limiting structure, and the inner flanging tightly wraps the bottom edge of the outer convex ring to prevent the outer convex ring from falling off, so that the lower short pipe is fixedly connected with the connecting port of the upper short pipe; the two parts of the product are fixedly connected without welding points, so that the smoke body is prevented from corroding welding points, and the service life of the anti-downdraft smoke exhaust joint is prolonged.
Drawings
FIG. 1 is a perspective view of the product of the present invention;
FIG. 2 is a cross-sectional view of the product of the present invention;
FIG. 3 is a sectional view of the upper short tube of the product of the present invention;
FIG. 4 is a cross-sectional view of a lower short tube of the product of the present invention;
FIG. 5 is a perspective view of the lower short tube of the product of the present invention;
FIG. 6 is an exploded view of the lower short tube of the product of the present invention;
FIG. 7 is an enlarged view taken at lower right A of FIG. 2;
fig. 8 is a cross-sectional view of the product of the invention, the lower short pipe is provided with a surrounding groove.
The device comprises an upper short pipe 1, a lower short pipe 2, a discharge flue 11, a discharge port 12, a connecting port 13, an inner flanging 131, an upward jacking limiting structure 132, a discharge port 21, a discharge port 22, an upper ring piece 23, an upper shrinking ring step 24, an outer convex ring 25, a lower shrinking ring step 26, a lower ring short pipe 27, an inner encircling groove 3, an anti-downdraft cover 4, a slope step 5 and an encircling groove 271.
Detailed Description
A down-draft prevention smoke discharging joint of a water heater comprises an upper short pipe 1 and a lower short pipe 2; a discharge flue 11 is arranged in the upper short pipe 1, a discharge port 12 is arranged at the top, a connecting port 13 is arranged at the bottom, and an inner flanging 131 is extended from the bottom edge; an upward jacking limiting structure 132 is protruded on the inner wall of the connecting port; the top of the lower short pipe 2 is a smoke outlet 21, and the bottom is a smoke inlet 22; an outer convex ring 25 extends from the upper section pipe wall of the lower short pipe 2; the upper section of the lower short pipe 2 is inserted into the connecting port 13, the outer convex ring 25 can be just inserted into the connecting port 13 and is closely and fixedly connected, the upper convex ring is limited by the upward jacking limiting structure 132 and can not move upwards, the bottom edge of the outer convex ring 25 is tightly wrapped by the inner flanging 131 to prevent downward falling off, and therefore the lower short pipe 2 is fixedly connected with the connecting port 13 of the upper short pipe 1.
The lower short pipe 2 comprises an upper ring part 23, an upper shrinking ring step 24, an outer convex ring 25, a lower shrinking ring step 26 and a lower ring short pipe 27, the bottom of the lower ring short pipe 27 is a smoke inlet 22, and the top of the upper ring part 23 is a smoke outlet 21; the bottom edge of the upper ring piece 23 is connected with the inner ring edge of the upper reducing ring step 24, the outer ring edge of the upper reducing ring step 24 is connected with the upper ring edge of the outer convex ring 25, the lower ring edge of the outer convex ring 25 is connected with the outer ring edge of the lower reducing ring step 26, and the inner ring edge of the lower reducing ring step 26 is connected with the top ring edge of the lower ring short pipe 27; after the outer convex ring is inserted into the connector, the upper shrinkage ring step and the upward jacking limiting structure are limited, jacked and fixed to prevent the outer convex ring from going upward, and the inner flanging tightly wraps and fixes the edge of the lower shrinkage ring step to prevent the outer convex ring from falling off.
An inner surrounding groove 3 is formed between the upper ring piece 23 and the inner wall of the upper short pipe 1 through an upper shrinking ring step 24; the wall body of the upper shrinkage stage ring step 24 is connected with a support lug, the support lug is movably connected with an anti-backflow cover 4 in a penetrating mode through a pin, the anti-backflow cover 4 covers the smoke outlet 21 (is covered in a contact mode), the diameter of the anti-backflow cover 4 is slightly larger than that of the smoke outlet 21, and the anti-backflow cover 4 provides a cover opening space through the inner surrounding groove 3; the edge of the anti-downdraft cover 4 touches the inner wall of the upper short pipe 1 to stop the cover opening, the upward cover opening angle is less than 85 degrees, the preferred inclination is 70-75 degrees, and the cover can fall down to close the smoke outlet 21 by utilizing the self gravity after the cover is opened.
The upper short pipe 1 is formed by welding and/or stretching integrally; the lower short pipe 2 is formed by welding and/or stretching into a whole.
The upper short pipe 1 and the lower short pipe 2 are made of stainless steel.
The anti-backflow cover 4 is an arc-shaped surface which is slightly convex downwards as a whole and is provided with an anti-backflow cover 4.
The upper short pipe 1 is small in upper part and large in lower part and is transited through a slope step 5.
The height of the convex ring is 5 mm-2 cm.
The upward jacking limiting structure is an inward convex ring rib on the inner wall of the upper short pipe, and the outer wall of the opposite upper short pipe is a ring groove. The inner convex ring rib is formed by rolling by metal processing machinery.
The upper ring member 23, the upper reducing ring step 24, the outer convex ring 25, the lower reducing ring step 26 and the lower ring short pipe 27 are formed by rolling by a metal processing machine.
The anti-downdraft smoke exhaust joint is circular.
The top of the lower ring short pipe 27 is provided with a surrounding groove 271 which is arranged below and adjacent to the step of the lower contraction level ring; encircle the groove be used for with the top cigarette export joint of water heater, the cigarette export of water heater shell is connected around the groove along the card income, plays the anticreep messenger, stabilizes whole anti-downdraft smoke exhaust joint. The surrounding groove is provided according to the needs of the product.
The upward jacking and limiting structure can also be a bump, a convex particle column, a clamping block, a screw and the like.
The smoke body enters from the smoke inlet, the anti-backflow cover is pushed upwards by the strong smoke exhaust thrust of the water heater to enable the smoke to be discharged through the smoke outlet (the anti-backflow cover can be pushed due to the fact that the fan is installed in the water heater), then the smoke enters the smoke exhaust pipe from the smoke exhaust port, the smoke exhaust port is used for being connected with the smoke exhaust pipe, after the water heater is flamed out, the smoke exhaust stops, the anti-backflow cover naturally falls down to cover on the smoke outlet by utilizing the inclined state and the gravity of the anti-backflow cover to prevent backflow wind, the backflow wind is prevented from entering the water heater through the anti-backflow cover, and meanwhile, sand and sundries can be prevented from entering the water heater from the smoke flue.
The upper short pipe and the lower short pipe are simply and conveniently connected, and the connecting device has the significance of improving the production efficiency and reducing the production cost; the connecting structure has no welding spot, the smoke is difficult to corrode the body, the body is not rusted after long-time use, the connection is firm, and the appearance is attractive and elegant.
The integrated anti-downdraft cover has the advantages of reasonable overall design, simple structure, easy installation and production, large angle for pushing the anti-downdraft cover away, large smoke exhaust channel, large smoke exhaust amount, good opening/closing effect and no blockage; the anti-backflow cover is pushed open by strong exhaust smoke during working, automatically falls down and covers after flameout, prevents outside cold air and foreign objects from entering hot water, and is a safety device of the gas water heater, so that the next start and operation safety is ensured.
The anti-backflow cover is connected with the first support lug by adopting a shaft lever (roller pin) penetrating method.
The anti-downdraft smoke discharging joint of the water heater is arranged at the smoke discharging port at the top end of the water heater. When the water heater is used, the air cover is opened, waste gas (smoke body) is freely discharged, when the water heater stops working, the air cover is automatically closed by the anti-backflow air cover, strong cold air is prevented from entering the water heater, the water heater is protected, and the water heater is particularly suitable for continents in high and cold regions.
The specific structure embodiment of the product:
a down-draft prevention smoke discharging joint of a water heater comprises an upper short pipe 1 and a lower short pipe 2; a discharge flue 11 is arranged in the upper short pipe 1, a discharge port 12 is arranged at the top, a connecting port 13 is arranged at the bottom, and an inner flanging 131 is extended from the bottom edge; an upward jacking limiting structure 132 is protruded on the inner wall of the connecting port; the top of the lower short pipe 2 is a smoke outlet 21, and the bottom is a smoke inlet 22; an outer convex ring 25 extends from the upper section pipe wall of the lower short pipe 2;
the lower short pipe 2 comprises an upper ring part 23, an upper shrinking ring step 24, an outer convex ring 25, a lower shrinking ring step 26 and a lower ring short pipe 27, the bottom of the lower ring short pipe 27 is a smoke inlet 22, and the top of the upper ring part 23 is a smoke outlet 21; the bottom edge of the upper ring piece 23 is connected with the inner ring edge of the upper reducing ring step 24, the outer ring edge of the upper reducing ring step 24 is connected with the upper ring edge of the outer convex ring 25, the lower ring edge of the outer convex ring 25 is connected with the outer ring edge of the lower reducing ring step 26, and the inner ring edge of the lower reducing ring step 26 is connected with the top ring edge of the lower ring short pipe 27; after the outer convex ring is inserted into the connecting port, the upper shrinkage ring step and the upward jacking limiting structure are limited, jacked and fixed to prevent the lower short pipe 2 from going upward, and the inner flanging tightly wraps and fixes the edge of the lower shrinkage ring step to prevent the lower short pipe from falling off (equivalent to the upward jacking limiting structure and the inner flanging tightly clamp and fix the outer convex ring 25); an inner surrounding groove 3 is formed between the upper ring piece 23 and the inner wall of the upper short pipe 1 through an upper shrinking ring step 24; the wall body of the upper shrinkage stage ring step 24 is connected with a support lug, the support lug is movably connected with an anti-backflow cover 4 in a penetrating mode through a pin, the anti-backflow cover 4 covers the smoke outlet 21, the diameter of the anti-backflow cover 4 is slightly larger than that of the smoke outlet 21, and the anti-backflow cover 4 provides a cover opening space by utilizing the inner surrounding groove 3; the edge of the anti-backflow cover 4 touches the inner wall of the upper short pipe 1 to stop opening the cover, the upward opening angle is less than 85 degrees, and the cover can fall down to close the smoke outlet 21 by utilizing the gravity of the cover after the cover is opened. The upper short pipe 1 and the lower short pipe 2 are made of stainless steel; the upward jacking and limiting structure is an inward convex ring rib on the inner wall of the upper short pipe. The height of the convex ring is 1 cm.
Above only do the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention all belong to the protection scope of the present invention. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (10)
1. A prevent down-draught smoke discharging joint for water heater, its characterized in that: the anti-downdraft smoke exhaust joint comprises an upper short pipe and a lower short pipe;
the upper short pipe is internally provided with a smoke discharge flue, the top of the upper short pipe is provided with a smoke discharge port, the bottom of the upper short pipe is provided with a connecting port, and the bottom edge of the upper short pipe extends to form an inward flange; an upward jacking limiting structure is protruded on the inner wall of the connecting port;
the top of the lower short pipe is a smoke outlet, and the bottom of the lower short pipe is a smoke inlet; an outer convex ring extends from the upper section pipe wall of the lower short pipe; the upper section of the lower short pipe is inserted into the connecting port, the outer convex ring can be just inserted into the connecting port and is closely and fixedly connected with the connecting port, the outer convex ring is limited by the upward jacking limiting structure and cannot go upward any more, and the inner flanging tightly wraps the bottom edge of the outer convex ring to prevent the outer convex ring from falling off, so that the lower short pipe is fixedly connected with the connecting port of the upper short pipe.
2. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 1, wherein: the lower short pipe comprises an upper ring part, an upper shrinking ring step, an outer convex ring, a lower shrinking ring step and a lower ring short pipe, the bottom of the lower ring short pipe is a smoke inlet, and the top of the upper ring part is a smoke outlet; the bottom edge of the upper ring piece is connected with the inner ring edge of the upper shrinking ring step, the outer ring edge of the upper shrinking ring step is connected with the upper ring edge of the outer convex ring, the lower ring edge of the outer convex ring is connected with the outer ring edge of the lower shrinking ring step, and the inner ring edge of the lower shrinking ring step is connected with the top ring edge of the lower ring short pipe; after the outer convex ring is inserted into the connector, the upper shrinkage ring step and the upward jacking limiting structure are limited, jacked and fixed to prevent the outer convex ring from going upward, and the inner flanging tightly wraps and fixes the edge of the lower shrinkage ring step to prevent the outer convex ring from falling off.
3. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 2, wherein: an inner surrounding groove is formed between the upper ring piece and the upper short pipe through an upper shrinking ring step; the wall body of the upper shrinkage stage ring step is connected with a support lug, the support lug is movably connected with an anti-backflow cover in a penetrating mode through a pin, the anti-backflow cover covers the smoke outlet, the diameter of the anti-backflow cover is slightly larger than that of the smoke outlet, and the anti-backflow cover provides a cover opening space by utilizing the inner surrounding groove; the edge of the anti-downdraft cover touches the inner wall of the upper short pipe to stop opening the cover, the upward opening angle is less than 85 degrees, and the cover can fall down to close the smoke outlet by utilizing the gravity of the cover after the cover is opened.
4. A down-draft prevention smoke exhaust joint of a water heater as claimed in claim 1 or 2, wherein: the upper short pipe is formed by loop welding or stretching integrally; the lower short pipe is formed by welding or stretching into a whole.
5. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 1, wherein: the upper short pipe and the lower short pipe are made of stainless steel.
6. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 3, wherein: the anti-backflow cover is an arc-shaped surface which is slightly convex downwards as a whole.
7. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 1, wherein: the upper short pipe is small in the upper part and large in the lower part and is transited through a slope step.
8. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 1, wherein: the height of the convex ring is 5 mm-2 cm.
9. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 1, wherein: the upward jacking and limiting structure is an inward convex ring rib on the inner wall of the upper short pipe.
10. The anti-downdraft smoke exhaust joint of the water heater as claimed in claim 2, wherein: and the top of the lower ring short pipe is provided with a surrounding groove which is arranged below and adjacent to the step of the lower contraction ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020090743.3U CN211739498U (en) | 2020-01-15 | 2020-01-15 | Anti-downdraft smoke discharging joint for water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020090743.3U CN211739498U (en) | 2020-01-15 | 2020-01-15 | Anti-downdraft smoke discharging joint for water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211739498U true CN211739498U (en) | 2020-10-23 |
Family
ID=72880884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020090743.3U Expired - Fee Related CN211739498U (en) | 2020-01-15 | 2020-01-15 | Anti-downdraft smoke discharging joint for water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211739498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665190A (en) * | 2020-10-26 | 2021-04-16 | 无锡市锡山环宇金属软管有限公司 | Wall hanging boiler tube is with preventing down draught air door lid |
-
2020
- 2020-01-15 CN CN202020090743.3U patent/CN211739498U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665190A (en) * | 2020-10-26 | 2021-04-16 | 无锡市锡山环宇金属软管有限公司 | Wall hanging boiler tube is with preventing down draught air door lid |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201023 |
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| CF01 | Termination of patent right due to non-payment of annual fee |