CN211502738U - Intelligent waste heat recovery equipment for continuous drainage of boiler - Google Patents
Intelligent waste heat recovery equipment for continuous drainage of boiler Download PDFInfo
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- CN211502738U CN211502738U CN201922364177.0U CN201922364177U CN211502738U CN 211502738 U CN211502738 U CN 211502738U CN 201922364177 U CN201922364177 U CN 201922364177U CN 211502738 U CN211502738 U CN 211502738U
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Abstract
The utility model discloses an intelligent waste heat recovery equipment of boiler continuous drainage, which comprises a boiler steam drum, a continuous drainage flash tank, a deaerator and a heat exchanger, wherein a water outlet of the boiler steam drum is connected with a water inlet of the continuous drainage flash tank through a water outlet pipe A, the horizontal section of the water outlet pipe A is connected in parallel with a water outlet pipe B, a steam outlet of the continuous drainage flash tank is communicated with the deaerator through a steam outlet pipe, a water outlet of the continuous drainage flash tank is connected with an inlet of the heat exchanger through a water delivery pipe, an outlet of the heat exchanger is connected with a filtering box body through a water outlet pipe, the water outlet pipe is connected with the upper part of the left side of the filtering box body, a box door is arranged in the middle of the front side of the filtering box body, the lower part of the right side of the filtering box body is connected with an inlet of a water softener through a; the utility model has the advantages of high waste heat utilization rate, convenient replacement of filter screen, good filtering and purifying effect and cyclic utilization of the continuous drainage after multi-stage treatment.
Description
Technical Field
The utility model belongs to the technical field of waste heat utilization, especially, relate to a boiler even drainage intelligence waste heat recovery equipment.
Background
The boiler produces a large amount of high temperature sewage at the in-process that uses, be in long-term stable operation for the quality of assurance boiler water, the boiler must carry out continuous blowdown, get rid of sewage from the boiler steam pocket continuously promptly, with salt content and the slag content in the reduction boiler water, these are even the drainage is arranged to carry out the dilatation of reducing pressure in the continuous blowdown flash vessel from the boiler steam pocket, adiabatic expansion separation is secondary steam and waste hot water in the continuous blowdown flash vessel, secondary steam enters into the oxygen-eliminating device, waste hot water is directly arranged to the environment or is arranged to the environment after the cooling is handled, not only cause the waste of heat and water resource, increase use cost, still cause environmental pollution, consequently, continue to design one kind and can carry out waste heat recovery's equipment to boiler even drainage.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, and provide one kind and conveniently operate, even the drainage carries out abundant heat exchange with cold water and cold air, hot water and hot air after the heat exchange supply people daily life to use, waste heat utilization rate is high, conveniently change the filter screen, stage filtration, filtration purification effect are good, even the drainage is cyclic utilization, water resource utilization rate is high, energy-concerving and environment-protective boiler even drainage intelligence waste heat recovery equipment behind the multilevel processing.
The purpose of the utility model is realized like this: the utility model provides a boiler even drainage intelligence waste heat recovery equipment, it includes boiler steam drum, even arranges flash tank, oxygen-eliminating device and heat exchanger, the outlet of boiler steam drum pass through drain pipe A and even arrange the water inlet of flash tank and link to each other, drain pipe A vertical section on install the drainage main valve, drain pipe A horizontal segment on install drain valve A, drain pipe A horizontal segment parallelly connected have drain pipe B, drain pipe B on install drain valve B, even arrange the exhaust port of flash tank and be linked together through exhaust pipe and oxygen-eliminating device, the exhaust pipe on install the exhaust valve, the delivery port of even arranging the flash tank pass through the raceway and link to each other with the import of heat exchanger, the raceway on install the outlet valve, the export of heat exchanger have the filter box body through going out water piping connection, the outlet pipe with filter box body left side upper portion link to each other, the outlet pipe on install suction pump A, filtration box front side mid-mounting have a chamber door, the chamber door on install the handle, filtration box right side lower part lead to pipe A and the import of water softener link to each other, water pipe A on install circulating water pump, the export of water softener lead to pipe B and the import of reverse osmosis water purification machine link to each other, water pipe B on install suction pump B, the export of reverse osmosis water purification machine pass through the back flow and the boiler steam pocket links to each other, the back flow on install suction pump C.
The heat exchanger include the inner tube, inner tube outside middle part cup jointed the middle level sleeve pipe, middle level sleeve pipe outside middle part cup jointed outer sleeve pipe, inner tube, middle level sleeve pipe and outer sleeve pipe be the hollow tube, even the delivery port of arranging the flash tank pass through the raceway and link to each other with the sheathed tube import of middle level, the sheathed tube export of middle level pass through the outlet pipe and link to each other with filtering box left side upper portion, inner tube lower part and upper portion be provided with inlet and liquid outlet respectively, inlet and liquid outlet on install feed liquor valve and play liquid valve respectively, outer sleeve pipe right side lower part and left side upper portion be provided with air inlet and gas outlet respectively, air inlet and gas outlet on install admission valve and gas outlet valve respectively.
The inner tube lateral wall on fixedly connected with guide plate A, middle level sleeve pipe inside wall on fixedly connected with guide plate B, outer layer sleeve pipe inside wall on fixedly connected with guide plate C, guide plate A stiff end highly be higher than guide plate A expansion end height, guide plate B stiff end highly be higher than guide plate B expansion end height, guide plate C stiff end highly be lower than guide plate C expansion end height.
Filter box left side inner wall upper portion and left side inner wall lower part fixedly connected with inserted block A and inserted block B respectively, filter box right side inner wall upper portion and right side inner wall lower part fixedly connected with inserted block C and inserted block D respectively, inserted block A highly be higher than inserted block C's height, inserted block B highly be less than inserted block D's height, inserted block A right side and inserted block B right side be provided with slot A and slot B respectively, inserted block C left side and inserted block D left side be provided with slot C and slot D respectively, inserted block A and inserted block C peg graft through slot A and slot C and have filter screen A, inserted block B and inserted block D peg graft through slot B and slot D and have filter screen B, filter screen A front side middle part and the equal fixedly connected with handle of filter screen B front side middle part.
The diameter of the filter hole of the filter screen A is larger than that of the filter hole of the filter screen B.
And a sealing strip is arranged at the joint between the box door and the filtering box body.
The utility model discloses the beneficial effect who produces:
the utility model discloses an intelligent waste heat recovery equipment of boiler even drainage, open drainage main valve, drain valve A and drain valve B, sewage in the boiler steam pocket shunts to the horizontal segment of drain pipe A and drain pipe B in through the vertical section of drain pipe A, play the effect of slowing down blowdown speed, then converge to drain pipe A horizontal segment right side back and discharge in the flash tank even, even the drainage separates into secondary steam and useless hot water in the flash tank even adiabatic expansion, open the exhaust valve, secondary steam enters into the oxygen-eliminating device through the exhaust pipe, open the outlet valve, useless hot water discharges to the middle level of heat exchanger intraductal through the raceway, open the feed liquor valve and the drain valve of heat exchanger inner tube, pump into cold water through the water pump to the intraductal, open the sheathed tube admission valve and the outlet valve of heat exchanger outer layer, drum into cold air through the air-blower to the outer level of heat exchanger intraductal, the flow direction of cold water and cold air is from bottom to top, the flow direction of the waste hot water is from top to bottom, the reverse flow is favorable for cold water and cold air to fully exchange heat with the waste hot water, the outer side wall of the inner pipe is fixedly connected with a guide plate A, the inner side wall of the middle layer sleeve is fixedly connected with a guide plate B, the inner side wall of the outer layer sleeve is fixedly connected with a guide plate C, the fixed end of the guide plate A is higher than the movable end of the guide plate A, the fixed end of the guide plate B is higher than the movable end of the guide plate B, and the fixed end of the guide plate C is lower than the movable end of the guide plate C, the waste hot water flows in the middle layer sleeve in an S shape under the action of the guide plate A and the guide plate B, the flow rate of the waste hot water is reduced, the waste hot water flows intermittently along the outer side wall of the inner pipe and, the waste hot water, the cold water and the cold air are subjected to full heat exchange, the waste heat of the waste hot water is effectively utilized, and the hot water and the hot air after heat exchange are discharged from the liquid outlet and the air outlet respectively for the daily life of people.
Wastewater after heat exchange enters a filter box body under the action of a water pump, an insert A and an insert B are respectively and fixedly connected to the upper part of the inner wall of the left side of the filter box body and the lower part of the inner wall of the left side of the filter box body, an insert C and an insert D are respectively and fixedly connected to the upper part of the inner wall of the right side of the filter box body and the lower part of the inner wall of the right side of the filter box body, the height of the insert A is higher than that of the insert C, the height of the insert B is lower than that of the insert D, an insert A and an insert B are respectively arranged on the right side of the insert A and the right side of the insert B, an insert C and an insert D are respectively provided with an insert C and an insert D, a filter screen A is inserted into the insert A and the insert C through the insert A and the insert C, a filter screen B is inserted into the insert B and the insert B through the, the filter screen A and the filter screen B not only play a role in filtering, but also play a role in guiding flow, and are beneficial to fully filtering the wastewater; and the diameter of the filter hole of the filter screen A is larger than that of the filter hole of the filter screen B, so that the filter screen has good filtering effect by classified filtration.
After filtering for a period of time, opening the box door, drawing the filter screen A out of the insert block A and the insert block C through the handle, drawing the filter screen B out of the insert block B and the insert block D through the handle, and replacing a new filter screen to prevent the filter effect from being reduced due to the blockage of the filter screen; in addition, the sealing strip is arranged at the joint between the box door and the filtering box body, so that the sealing performance is good, and water is prevented from flowing out from a gap of the box door.
The circulating water pump is started, the filtered wastewater enters the water softener under the action of the circulating water pump, calcium and magnesium ions in the water are removed through ion exchange resin, the water hardness is reduced, the purpose of softening water is achieved, and therefore the phenomenon that carbonate scales on a pipeline, a container and a boiler is avoided, the softened water enters the reverse osmosis water purifier under the action of the water suction pump B, the reverse osmosis water purifier performs microfiltration, adsorption, ultrafiltration, reverse osmosis, ultraviolet sterilization and ultra-purification treatment on the water, the purity of the water is improved, the purified water flows back to the boiler under the action of the water suction pump C for cyclic utilization, the water resource is effectively benefited, and the resource waste is avoided.
Total, the utility model has the advantages of convenient operation, even the hot water and the hot-air after drainage and cold water and cold air carry out abundant heat exchange, heat exchange supply people daily life to use, waste heat utilization rate is high, conveniently change the filter screen, stage filtration, filtration purifying effect is good, even the drainage cyclic utilization behind the multi-stage treatment, water resource utilization rate is high, energy-concerving and environment-protective.
Drawings
Fig. 1 is the utility model relates to a boiler even drainage intelligence waste heat recovery equipment's schematic structure diagram.
Fig. 2 is the utility model relates to a cross-sectional view of heat exchanger among boiler even drainage intelligence waste heat recovery equipment.
Fig. 3 is the utility model relates to a cross-sectional view of filter box among boiler even drainage intelligence waste heat recovery equipment.
Fig. 4 is the utility model relates to a boiler is inserted block A and inserted block C's among drainage intelligence waste heat recovery equipment schematic structure.
Fig. 5 is the utility model relates to a boiler is inserted block B and inserted block D's among drainage intelligence waste heat recovery equipment schematic structure.
In the figure: 1. boiler steam drum 2, main water drainage valve 3, water drainage pipe A4, water drainage pipe B5, water drainage valve B6, water drainage valve A7, steam drainage valve 8, steam drainage pipe 9, deaerator 10, water outlet valve 11, liquid outlet valve 12, liquid outlet 13, inner pipe 14, outer casing 15, air inlet 16, water pump A17, air inlet valve 18, water outlet pipe 19, filter box 20, box door 21, handle 22, water pipe A23, circulating water pump 24, liquid inlet valve 25, liquid inlet 26, water softener 27, water pump B28, reverse osmosis water purifier 29, water pump C30, return pipe 31, water pipe B32, middle casing 33, air outlet valve 34, air outlet 35, water pipe 36, continuous discharge flash tank 37, guide plate C38, guide plate B39, guide plate A40, insert block B41, plug-in-tank, water outlet valve C32, water outlet pipe C32, water, Filter screen A42, insert A43, handle 44, insert C45, insert D46, filter screen B47, slot A48, slot C49, slot B50, slot D.
Detailed Description
Example 1
As shown in fig. 1-5, an intelligent waste heat recovery device for continuous drainage of a boiler comprises a boiler drum 1, a continuous drainage flash tank 36, a deaerator 9 and a heat exchanger, wherein a water outlet of the boiler drum 1 is connected with a water inlet of the continuous drainage flash tank 36 through a water outlet pipe A3, a main drainage valve 2 is installed on a vertical section of the water outlet pipe A3, a water outlet valve a6 is installed on a horizontal section of the water outlet pipe A3, a water outlet pipe B4 is connected in parallel with a horizontal section of the water outlet pipe A3, a water outlet valve B5 is installed on the water outlet pipe B4, a steam outlet of the continuous drainage flash tank 36 is communicated with the deaerator 9 through a steam outlet pipe 8, a steam outlet valve 7 is installed on the steam outlet pipe 8, a water outlet of the continuous drainage flash tank 36 is connected with an inlet of the heat exchanger through a water pipe 35, a water outlet valve 10 is installed on the water pipe 35, an outlet of the heat exchanger is connected with a filter box 19 through a, outlet pipe 18 and filter box 19 left side upper portion link to each other, outlet pipe 18 on install suction pump A16, 19 front side mid-mounting of filter box have chamber door 20, chamber door 20 on install handle 21, 19 right side lower part of filter box lead to pipe A22 and water softener 26's import link to each other, water pipe A22 on install circulating water pump 23, water softener 26's export lead to pipe B31 and reverse osmosis water purification machine 28's import link to each other, water pipe B31 on install suction pump B27, reverse osmosis water purification machine 28's export pass through back flow pipe 30 and link to each other with boiler steam pocket 1, back flow pipe 30 on install suction pump C29.
The heat exchanger include inner tube 13, inner tube 13 outside middle part cup jointed middle level sleeve pipe 32, middle level sleeve pipe 32 outside middle part cup jointed outer sleeve pipe 14, inner tube 13, middle level sleeve pipe 32 and outer sleeve pipe 14 be the hollow tube, the delivery port of the flash tank 36 of even arranging link to each other through raceway 35 and middle level sleeve pipe 32's import, middle level sleeve pipe 32's export link to each other with filtering box 19 left side upper portion through outlet pipe 18, inner tube 13 lower part and upper portion be provided with inlet 25 and liquid outlet 12 respectively, inlet 25 and liquid outlet 12 on install feed liquor valve 24 and play liquid valve 11 respectively, outer sleeve pipe 14 right side lower part and left side upper portion be provided with air inlet 15 and gas outlet 34 respectively, air inlet 15 and gas outlet 34 on install admission valve 17 and gas outlet valve 33 respectively.
The upper portion of the inner wall of the left side of the filter box body 19 and the lower portion of the inner wall of the left side of the filter box body 19 are fixedly connected with an insertion block A42 and an insertion block B40 respectively, the upper portion of the inner wall of the right side of the filter box body 19 and the lower portion of the inner wall of the right side of the filter box body are fixedly connected with an insertion block C44 and an insertion block D45 respectively, the insertion block A42 is higher than the insertion block C44, the insertion block B40 is lower than the insertion block D45, the right side of the insertion block A42 and the right side of the insertion block B40 are respectively provided with an insertion groove A47 and an insertion groove B49, the left side of the insertion block C44 and the left side of the insertion block D45 are respectively provided with an insertion groove C48 and an insertion groove D50, the insertion block A50 and the insertion block C50 are respectively inserted with a filter screen A50 through an insertion groove A50 and an insertion groove B50, the insertion block B50 and the middle portion of the filter screen B3643.
The diameter of the filter holes of the filter screen A41 is larger than that of the filter holes of the filter screen B46.
And a sealing strip is arranged at the joint between the box door 20 and the filtering box body 19.
The working principle of the embodiment is as follows: opening a main drainage valve, a drainage valve A and a drainage valve B, dividing sewage in a boiler drum into a horizontal section of the drainage pipe A and the drainage pipe B through a vertical section of the drainage pipe A to play a role of slowing down the sewage discharge speed, then converging the sewage to the right side of the horizontal section of the drainage pipe A and then continuously discharging the sewage into a continuous drainage flash tank, carrying out adiabatic expansion separation on the continuous drainage flash tank into secondary steam and waste hot water, opening a steam discharge valve, enabling the secondary steam to enter a deaerator through a steam discharge pipe, opening a water outlet valve, discharging the waste hot water into a middle-layer sleeve of a heat exchanger through a water conveying pipe, opening a liquid inlet valve and a liquid outlet valve of an inner pipe of the heat exchanger, pumping cold water into an inner pipe through a water pump, opening an air inlet valve and an air outlet valve of an outer-layer sleeve of the heat exchanger, blowing cold air into the outer-layer sleeve through an air blower, wherein the flow direction of the cold water, the reverse flow is favorable for the cold water and the cold air to fully exchange heat with the waste hot water, the outer side wall of the inner pipe is fixedly connected with a guide plate A, the inner side wall of the middle layer sleeve is fixedly connected with a guide plate B, the inner side wall of the outer layer sleeve is fixedly connected with a guide plate C, the fixed end of the guide plate A is higher than the movable end of the guide plate A, the fixed end of the guide plate B is higher than the movable end of the guide plate B, and the fixed end of the guide plate C is lower than the movable end of the guide plate C, the waste hot water flows in the middle layer sleeve in an S shape under the action of the guide plate A and the guide plate B, thereby not only slowing down the flow velocity of the waste hot water, but also enabling the waste hot water to intermittently flow along the outer side wall of the inner pipe and the inner side wall of the middle layer, the waste heat of the waste hot water is effectively utilized, and the hot water and the hot air after heat exchange are discharged from the liquid outlet and the air outlet respectively for the daily life of people.
Wastewater after heat exchange enters a filter box body under the action of a water pump, an insert A and an insert B are respectively and fixedly connected to the upper part of the inner wall of the left side of the filter box body and the lower part of the inner wall of the left side of the filter box body, an insert C and an insert D are respectively and fixedly connected to the upper part of the inner wall of the right side of the filter box body and the lower part of the inner wall of the right side of the filter box body, the height of the insert A is higher than that of the insert C, the height of the insert B is lower than that of the insert D, an insert A and an insert B are respectively arranged on the right side of the insert A and the right side of the insert B, an insert C and an insert D are respectively provided with an insert C and an insert D, a filter screen A is inserted into the insert A and the insert C through the insert A and the insert C, a filter screen B is inserted into the insert B and the insert B through the, the filter screen A and the filter screen B not only play a role in filtering, but also play a role in guiding flow, and are beneficial to fully filtering the wastewater; and the diameter of the filter hole of the filter screen A is larger than that of the filter hole of the filter screen B, so that the filter screen has good filtering effect by classified filtration.
After filtering for a period of time, opening the box door, drawing the filter screen A out of the insert block A and the insert block C through the handle, drawing the filter screen B out of the insert block B and the insert block D through the handle, and replacing a new filter screen to prevent the filter effect from being reduced due to the blockage of the filter screen; in addition, the sealing strip is arranged at the joint between the box door and the filtering box body, so that the sealing performance is good, and water is prevented from flowing out from a gap of the box door.
The circulating water pump is started, the filtered wastewater enters the water softener under the action of the circulating water pump, calcium and magnesium ions in the water are removed through ion exchange resin, the water hardness is reduced, the purpose of softening water is achieved, and therefore the phenomenon that carbonate scales on a pipeline, a container and a boiler is avoided, the softened water enters the reverse osmosis water purifier under the action of the water suction pump B, the reverse osmosis water purifier performs microfiltration, adsorption, ultrafiltration, reverse osmosis, ultraviolet sterilization and ultra-purification treatment on the water, the purity of the water is improved, the purified water flows back to the boiler under the action of the water suction pump C for cyclic utilization, the water resource is effectively benefited, and the resource waste is avoided.
Claims (6)
1. The utility model provides a boiler is drainage intelligence waste heat recovery equipment even, it includes the boiler steam pocket, even arranges flash tank, oxygen-eliminating device and heat exchanger, its characterized in that: the water outlet of the boiler steam drum is connected with the water inlet of the continuous discharge flash tank through a water outlet pipe A, the vertical section of the water outlet pipe A is provided with a water discharge main valve, the horizontal section of the water outlet pipe A is provided with a water outlet pipe A in parallel, the water outlet pipe B is provided with a water outlet valve B, the steam outlet of the continuous discharge flash tank is communicated with the deaerator through a steam outlet pipe, the steam outlet pipe is provided with a steam outlet valve, the water outlet of the continuous discharge flash tank is connected with the inlet of the heat exchanger through a water pipe, the water outlet pipe is connected with the upper part of the left side of the filter tank body, the water outlet pipe is provided with a water suction pump A, the middle part of the front side of the filter tank body is provided with a box door, and the box door is provided with a handle, filter box right side lower part lead to pipe A and the import of water softener link to each other, water pipe A on install circulating water pump, the export of water softener lead to pipe B and the import of reverse osmosis water purification machine link to each other, water pipe B on install suction pump B, reverse osmosis water purification machine export link to each other with the boiler steam pocket through the back flow, the back flow on install suction pump C.
2. The intelligent boiler continuous drainage waste heat recovery device according to claim 1, characterized in that: the heat exchanger include the inner tube, inner tube outside middle part cup jointed the middle level sleeve pipe, middle level sleeve pipe outside middle part cup jointed outer sleeve pipe, inner tube, middle level sleeve pipe and outer sleeve pipe be the hollow tube, even the delivery port of arranging the flash tank pass through the raceway and link to each other with the sheathed tube import of middle level, the sheathed tube export of middle level pass through the outlet pipe and link to each other with filtering box left side upper portion, inner tube lower part and upper portion be provided with inlet and liquid outlet respectively, inlet and liquid outlet on install feed liquor valve and play liquid valve respectively, outer sleeve pipe right side lower part and left side upper portion be provided with air inlet and gas outlet respectively, air inlet and gas outlet on install admission valve and gas outlet valve respectively.
3. The intelligent boiler continuous drainage waste heat recovery device according to claim 2, characterized in that: the inner tube lateral wall on fixedly connected with guide plate A, middle level sleeve pipe inside wall on fixedly connected with guide plate B, outer layer sleeve pipe inside wall on fixedly connected with guide plate C, guide plate A stiff end highly be higher than guide plate A expansion end height, guide plate B stiff end highly be higher than guide plate B expansion end height, guide plate C stiff end highly be lower than guide plate C expansion end height.
4. The intelligent boiler continuous drainage waste heat recovery device according to claim 1, characterized in that: filter box left side inner wall upper portion and left side inner wall lower part fixedly connected with inserted block A and inserted block B respectively, filter box right side inner wall upper portion and right side inner wall lower part fixedly connected with inserted block C and inserted block D respectively, inserted block A highly be higher than inserted block C's height, inserted block B highly be less than inserted block D's height, inserted block A right side and inserted block B right side be provided with slot A and slot B respectively, inserted block C left side and inserted block D left side be provided with slot C and slot D respectively, inserted block A and inserted block C peg graft through slot A and slot C and have filter screen A, inserted block B and inserted block D peg graft through slot B and slot D and have filter screen B, filter screen A front side middle part and the equal fixedly connected with handle of filter screen B front side middle part.
5. The intelligent boiler continuous drainage waste heat recovery device according to claim 4, characterized in that: the diameter of the filter hole of the filter screen A is larger than that of the filter hole of the filter screen B.
6. The intelligent boiler continuous drainage waste heat recovery device according to claim 1, characterized in that: and a sealing strip is arranged at the joint between the box door and the filtering box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922364177.0U CN211502738U (en) | 2019-12-25 | 2019-12-25 | Intelligent waste heat recovery equipment for continuous drainage of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922364177.0U CN211502738U (en) | 2019-12-25 | 2019-12-25 | Intelligent waste heat recovery equipment for continuous drainage of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211502738U true CN211502738U (en) | 2020-09-15 |
Family
ID=72419505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922364177.0U Expired - Fee Related CN211502738U (en) | 2019-12-25 | 2019-12-25 | Intelligent waste heat recovery equipment for continuous drainage of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211502738U (en) |
-
2019
- 2019-12-25 CN CN201922364177.0U patent/CN211502738U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200915 Termination date: 20201225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |