CN219168014U - Dust removal water curtain cabinet - Google Patents

Dust removal water curtain cabinet Download PDF

Info

Publication number
CN219168014U
CN219168014U CN202223425220.8U CN202223425220U CN219168014U CN 219168014 U CN219168014 U CN 219168014U CN 202223425220 U CN202223425220 U CN 202223425220U CN 219168014 U CN219168014 U CN 219168014U
Authority
CN
China
Prior art keywords
water
dust
cabinet body
cabinet
pipe
Prior art date
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.)
Active
Application number
CN202223425220.8U
Other languages
Chinese (zh)
Inventor
谭坤明
刘永强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Foshan Chongya Furniture Co ltd
Original Assignee
Foshan Chongya Furniture Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Foshan Chongya Furniture Co ltd filed Critical Foshan Chongya Furniture Co ltd
Priority to CN202223425220.8U priority Critical patent/CN219168014U/en
Application granted granted Critical
Publication of CN219168014U publication Critical patent/CN219168014U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Separation Of Particles Using Liquids (AREA)

Abstract

The utility model discloses a dust-removing water curtain cabinet which comprises a cabinet body, a curtain plate and a water tank, wherein the curtain plate is arranged on an outer side wall of the cabinet body, a water tank is arranged on the outer side wall of the cabinet body, the water tank is positioned at the top of the curtain plate, the bottom of the curtain plate is provided with a tooth part, a blocking area for blocking dust and a filtering area for filtering dust are arranged in the cabinet body, the filtering area is positioned above the blocking area, an air outlet is arranged at the top of the cabinet body, an air suction mechanism is arranged at the air outlet, the water tank is arranged at the bottom of the cabinet body, the water tank is communicated with the interior of the cabinet body, an inlet and a pump pool are respectively arranged at two sides of the water tank, the inlet is positioned below the curtain plate, the inlet is provided with a water guide plate, a collecting port is arranged between the water guide plate and the inner side wall of the cabinet body, and the pump pool is provided with a water pumping mechanism for pumping water in the pump pool into the water tank; the application forms the cascade through setting up basin on the curtain board cooperation cabinet body to set up in the cabinet body and block district and filter area and handle the dust, the dust removal effect is better.

Description

Dust removal water curtain cabinet
Technical Field
The utility model relates to the technical field of dust removal equipment, in particular to a dust removal water curtain cabinet.
Background
At present, a lot of dust can be generated when some sections are polished by using a polishing machine, so that the workshop is polluted, and the staff is injured.
In order to solve the problems, a polishing dust remover, which is also called a polishing dust collector, is widely applied to dust removing devices in industries such as casting, metallurgy, mine, building materials, refractory materials and the like, and most of the existing polishing dust removers are pipeline type dust removing fans, namely, dust is pumped into primary filtering equipment for filtering, and filtered air is led to other filtering equipment for multiple filtering treatment so as to reach emission standards; however, because the dust in the air of primary filtration is higher, the filter effect of the existing primary filtration equipment is relatively poor, and the primary filtration equipment can reach the emission standard only by multiple times of filtration treatment, and the dust is easy to accumulate in the equipment, so that the equipment is inconvenient to clean and brings a lot of inconvenience to staff.
It can be seen that there is a need for improvements and improvements in the art.
Disclosure of Invention
In view of the defects of the prior art, the utility model aims to provide the dust removal water curtain cabinet which has better dust removal effect and is convenient for removing internal dust.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the technical scheme of this application has proposed a dust removal cascade cabinet, it includes the cabinet body, curtain board and water tank, the curtain board sets up on an lateral wall of the cabinet body, be provided with the basin on the lateral wall of the cabinet body, the basin is located the top of curtain board, the bottom of curtain board is provided with tooth portion, the cabinet is internal to be provided with the filtration district that is used for blockking the dust and is used for filtering the dust, the filtration district is located the top of blockking the district, the top of the cabinet body is provided with the air outlet, the air outlet is provided with exhaust mechanism, the water tank sets up the bottom of the cabinet body, just the water tank with the inside intercommunication of the cabinet body, the both sides of water tank are provided with import and pump pool respectively, the import is located curtain board below, the import is provided with the water guide plate, the water guide plate with be provided with between the inside wall of the cabinet body and collect the mouth, the pump pool is provided with pumping mechanism, pumping mechanism is arranged in with the water pump pool in the basin.
In the dust-removing water curtain cabinet, a first door body communicated with the blocking area is arranged on the side wall of the cabinet body.
In the dust removal water curtain cabinet, the blocking area is provided with a plurality of baffles which are distributed in a staggered mode, the baffles are positioned above the collecting opening, and a second door body is arranged on one baffle which is close to the collecting opening.
In the dust-removing water curtain cabinet, a third door body communicated with the filtering area is arranged on the side wall of the cabinet body.
In the dust-removing water curtain cabinet, the filtering area is provided with a plurality of filter screens which are distributed in a staggered manner.
In the dust-removing water curtain cabinet, a spraying device is arranged between the filtering area and the air outlet.
The dust removal cascade cabinet in, spray set include main shower and interval distribution at a plurality of vice shower at filtration district top, the one end of main shower is used for running through the lateral wall of the cabinet body and connect outside high-pressure water supply equipment, the other end and a plurality of main shower the one end and the intercommunication of vice shower, the other end of vice shower is provided with main shower, just be provided with a plurality of vice shower of interval distribution on the vice shower, be provided with first valve body on the main shower.
In the dust removal water curtain cabinet, the water pumping mechanism comprises a water pump and a main water pipe, the water pump is positioned in the pump pool, one end of the main water pipe is connected with the output end of the water pump, and the other end of the main water pipe is communicated with the water tank.
In the dust removal water curtain cabinet, a second valve body is arranged on the main water pipe, an auxiliary water pipe leading to the second door body is communicated with the main water pipe, the auxiliary water pipe is positioned below the second valve body, and a third valve body is arranged on the auxiliary water pipe.
The dust removal water curtain cabinet in, exhaust mechanism includes air exhauster and tuber pipe, the air exhauster with the tuber pipe cooperation is connected, the one end of tuber pipe with the air outlet intercommunication, the other end of tuber pipe is used for being connected with other filtration equipment.
The beneficial effects are that:
the utility model provides a dust-removing water curtain cabinet, which is characterized in that a cabinet body, a curtain plate and a water tank are arranged at a dust outlet of a polishing machine, an inlet and a pump pool are respectively arranged at two sides of the water tank, water in the pump pool is pumped into a water tank through a water pumping mechanism, water in the water tank on the cabinet body overflows and flows to the inlet along the curtain plate to form a water curtain, and an air flow is generated between the inlet and an air outlet at the top of the cabinet body through the tooth part of the curtain plate matched with an air pumping mechanism, so that the inlet generates suction force on dust, part of fine dust is sucked into the cabinet body to be treated through a blocking area and a filtering area, and most of dust and waste dust are blocked by the curtain plate and mixed with the water to flow into the water tank, thereby achieving a better dust removing effect; in addition, through setting up spray set in the top of filtering area, utilize spray set to dash the laying dust on filtering area and the blocking area to collecting port, make a large amount of laying dust fall in the water tank to reduce filtering area and blocking area's laying dust volume, with it is more convenient to make filtering area and blocking area clean.
Drawings
FIG. 1 is a schematic plan view of a dust-removing water curtain cabinet provided by the utility model;
fig. 2 is a perspective view of a curtain plate provided by the present utility model.
Description of main reference numerals: 1-cabinet, 11-basin, 12-first door, 13-baffle, 14-second door, 15-third door, 16-filter screen, 2-curtain board, 21-tooth, 3-water tank, 31-import, 32-pump sump, 4-exhaust mechanism, 41-air exhauster, 42-tuber pipe, 43-shock absorber, 5-deflector, 6-filter screen, 7-spray set, 71-main spray pipe, 72-auxiliary spray pipe, 73-main spray head, 74-auxiliary spray head, 75-first valve body, 8-water pump, 81-water pump, 82-main water pipe, 83-second valve body, 84-auxiliary water pipe, 85-third valve body.
Detailed Description
The utility model provides a dust-removing water curtain cabinet, which is used for making the aim, the technical scheme and the effect of the utility model clearer and more definite, and the utility model is further described in detail below by referring to the attached drawings and the embodiments.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present utility model and for simplification of the description, and are not to be construed as limiting the present utility model; furthermore, the terms "mounted," "connected," and the like, are to be construed broadly and, as appropriate, the specific meaning of the terms in the present utility model will be understood by those of ordinary skill in the art.
Referring to fig. 1 and 2, the present utility model provides a dust-removing water curtain cabinet, which comprises a cabinet body 1, a curtain plate 2 and a water tank 3, wherein the curtain plate 2 is arranged on an outer side wall of the cabinet body 1, a water tank 11 is arranged on the outer side wall of the cabinet body 1, the water tank 11 is positioned at the top of the curtain plate 2, a tooth part 21 is arranged at the bottom of the curtain plate 2, a blocking area for blocking dust and a filtering area for filtering dust are arranged in the cabinet body 1, the filtering area is positioned above the blocking area, an air outlet is arranged at the top of the cabinet body 1, an exhaust fan 41 is arranged at the air outlet, the water tank 3 is arranged at the bottom of the cabinet body 1, the water tank 3 is communicated with the interior of the cabinet body 1, an inlet 31 and a pump pool 32 are respectively arranged at two sides of the water tank 3, the inlet 31 is positioned below the curtain plate 2, a water guide plate 5 is arranged at the inlet 31, a collecting port is arranged between the water guide plate 5 and the inner side wall of the cabinet body 1, a water pumping mechanism 8 is arranged at the pump pool 32, and the water pumping mechanism 8 is used for pumping water in the pump pool 32 into the water tank 11.
In the actual use process, the inlet 31 of the water tank 3 and the curtain plate 2 are arranged at the dust outlet of the polishing machine, water in the pump pool 32 is pumped into the water tank 11 through the water pumping mechanism 8, water in the water tank 11 overflows and flows along the curtain plate 2 to the inlet 31 to form a water curtain, the exhaust fan 41 is matched with the tooth part 21 at the bottom of the curtain plate 2, air flow is generated between the inlet 31 and the air outlet of the cabinet body 1, so that the inlet 31 generates suction force on dust, part of fine dust is sucked into the cabinet body 1 to be treated through the blocking area and the filtering area, and meanwhile, most of dust and waste dust are blocked by the curtain plate 2 and mixed with water to flow into the water tank 3, and a better dust removing effect is achieved.
It should be noted that the teeth 21 are at least partially immersed in the water with a ventilation gap between them so that part of the fine dust can be sucked into the cabinet 1
Optionally, as shown in fig. 1, the pump tank 32 is communicated with the water tank 3, and a filter screen 616 is arranged between the pump tank 32 and the water tank 3, so that water in the water tank 3 can circularly flow into the water tank 11, and water resources are saved; it should be noted that, when the water in the water tank 3 reaches a certain mixing degree, the water can be replaced, and when the dust and the sweeps in the water tank 3 reach a certain precipitation amount, the water can be cleaned, so that the normal use of the dust removal water curtain cabinet is not affected.
In some embodiments, as shown in fig. 1, a first door body 12 is disposed on a side wall of the cabinet body 1 and is communicated with the blocking area, so that the blocking area can be checked, maintained and cleaned by opening the first door body 12, and convenience in checking, maintaining or cleaning the blocking area is further improved.
Further, as shown in fig. 1, the blocking area is provided with a plurality of baffles 13 which are distributed in a staggered manner, the baffles 13 are positioned above the collecting port, in the actual operation process, part of dust close to the inlet 31 can be contacted with water to carry certain water vapor, and most of dust carrying water vapor can be blocked by the baffles 13, so that most of dust carrying water vapor falls into the collecting port; preferably, a second door 14 is arranged on a baffle 13 close to the collecting opening, dust falls into the collecting opening and then is deposited below the collecting opening, and after the first door 12 is opened, the second door 14 is opened again to clean the deposited dust regularly, so that the convenience of cleaning the dust deposited in the water tank 3 is further improved.
In some embodiments, as shown in fig. 1, a third door body 15 is disposed on a side wall of the cabinet body 1 and is communicated with the filtering area, so that the filtering area can be inspected, maintained and cleaned by opening the third door body 15, and convenience in inspecting, maintaining or cleaning the filtering area is further improved.
Further, as shown in fig. 1, the filtering area is provided with a plurality of filter screens 16 in staggered distribution, and the air flow entering the cabinet body 1 from the inlet 31 is further filtered through the filter screens 616, so that the dust filtering of the filtering area is realized, and the air flow entering from the inlet 31 is better filtered.
Preferably, the filter screen 16 is detachably connected with the inner wall of the cabinet 1, so that the filter screen 16 can be replaced or removed for cleaning.
In some embodiments, as shown in fig. 1, a spraying device 7 is arranged between the filtering area and the air outlet; in addition, when the filtering area and the blocking area need to be cleaned, the spraying device 7 is started, so that a large amount of accumulated dust on the filtering area and the blocking area falls into the water tank 3, the accumulated dust amount of the filtering area and the blocking area is reduced, the labor intensity of cleaning the filtering area and the blocking area is reduced, and the filtering area and the blocking area are cleaned more conveniently.
Specifically, referring to fig. 1, the spraying device 7 includes a main spraying pipe 71 and a plurality of auxiliary spraying pipes 72 distributed at the top of the filtering area at intervals, one end of the main spraying pipe 71 is used for penetrating through the side wall of the cabinet body 1 and connecting with external high-pressure water supply equipment, the other end of the main spraying pipe 71 is communicated with one end of the plurality of auxiliary spraying pipes 72, a main spray nozzle 73 is arranged at the other end of the auxiliary spraying pipe 72, a plurality of auxiliary spray nozzles 74 distributed at intervals are arranged on the auxiliary spraying pipe 72, and the main spray nozzle 73 is matched with the plurality of auxiliary spray nozzles 74, so that dust accumulation in the filtering area and the blocking area is sprayed.
Further preferably, the first valve body 75 is arranged on the main spray pipe 71, so that the water flow of the main spray pipe 71 is controlled through the first valve body 75, the water spraying pressure of the main spray head 73 and the auxiliary spray head 74 on the auxiliary spray pipe 72 is controlled, and meanwhile, the water stopping or water discharging of the main spray head 73 and the auxiliary spray head 74 can be controlled through the first valve body 75, so that the convenience in use of the spray device 7 is further improved.
In some embodiments, the water pumping mechanism 8 comprises a water pump 81 and a main water pipe 82, the water pump 81 is positioned in the pump pool 32, one end of the main water pipe 82 is connected with the output end of the water pump 81, the other end of the main water pipe 82 is communicated with the water tank 11, and the water pump 81 is connected with the main water pipe 82 in a matched manner, so that water in the pump pool 32 can be continuously supplemented into the water tank 11, and a water curtain is formed on the curtain plate 2.
Further alternatively, the main water pipe 82 is provided with a second valve body 83, the main water pipe 82 is communicated with a secondary water pipe 84 leading to the second door body 14, the secondary water pipe 84 is positioned below the second valve body 83, and the secondary water pipe 84 is provided with a third valve body 85. When the blocking area needs to be cleaned, the second door body 14 can be opened, the second valve body 83 is closed, the third valve body 85 is opened, and the water in the pump pool 32 is pumped out of the auxiliary water pipe 84 through the water pump 81 to clean the blocking area, so that the convenience of cleaning the blocking area is further improved.
In some embodiments, as shown in fig. 1, the exhaust fan 41 mechanism 4 includes an exhaust fan 41 and an air duct 42, where the exhaust fan 41 is cooperatively connected with the air duct 42, one end of the air duct 42 is communicated with an air outlet, and the other end of the air duct 42 is used for being connected with other filtering devices, and through the cooperative connection of the exhaust fan 41 and the air duct 42, an air flow is generated between the inlet 31 and the air outlet of the cabinet 1.
Preferably, the air duct 42 is arranged at the top of the cabinet body 1 through the shock absorber 43, so that the cabinet body 1 is prevented from being driven to shake when the exhaust fan 41 operates, and the operation stability of the exhaust fan 41 is improved.
In summary, the cabinet body 1, the curtain plate 2 and the water tank 3 are arranged at the dust outlet of the polishing machine, the inlet 31 and the pump pool 32 are respectively arranged at two sides of the water tank 3, water in the pump pool 32 is pumped into the water tank 11 through the water pumping mechanism 8, so that water in the water tank 11 on the cabinet body 1 overflows and flows to the inlet 31 along the curtain plate 2 to form a water curtain, the exhaust fan 41 mechanism 4 is matched with the tooth part 21 at the bottom of the curtain plate 2, and air flow is generated between the inlet 31 and the air outlet at the top of the cabinet body 1, so that the inlet 31 generates suction force on dust, part of fine dust is sucked into the cabinet body 1 to be treated through the blocking area and the filtering area, and meanwhile, most of dust and waste dust are mixed with the water through the blocking of the curtain plate 2 and flow into the water tank 3, and a better dust removing effect is achieved; in addition, through setting up spray set 7 in the top of filtering the district, utilize spray set 7 to dash the laying dust on filtering the district and blocking the district to collecting port, make a large amount of laying dust drop in water tank 3 to reduce the laying dust volume of filtering the district and blocking the district, with it is more convenient to make filtering the district and block the district clean.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present utility model and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model.

Claims (10)

1. The utility model provides a dust removal cascade cabinet, its characterized in that, includes the cabinet body, curtain board and water tank, the curtain board sets up on an lateral wall of the cabinet body, be provided with the basin on the lateral wall of the cabinet body, the basin is located the top of curtain board, the bottom of curtain board is provided with tooth portion, the cabinet is internal to be provided with the blocking area that is used for blocking the dust and the filtration district that is used for filtering the dust, the filtration district is located the top of blocking the area, the top of the cabinet body is provided with the air outlet, the air outlet is provided with exhaust mechanism, the water tank sets up the bottom of the cabinet body, just the water tank with the inside intercommunication of the cabinet body, the both sides of water tank are provided with import and pump pool respectively, the import is located the curtain board below, the import is provided with the water guide plate with be provided with the collection mouth between the inside wall of the cabinet body, the pump pool is provided with pumping mechanism, pumping mechanism is used for taking out the water in the pump pool in the basin.
2. The dust-removing water curtain cabinet according to claim 1, wherein a first door body communicated with the blocking area is arranged on the side wall of the cabinet body.
3. The dust-removing water curtain cabinet according to claim 2, wherein the blocking area is provided with a plurality of baffles in staggered distribution, the baffles are located above the collecting opening, and a second door body is arranged on a baffle close to the collecting opening.
4. A dust removing water curtain cabinet according to claim 3, wherein a third door body communicated with the filtering area is arranged on the side wall of the cabinet body.
5. The dusting water cabinet of claim 4 wherein the filter area is provided with a plurality of screens in staggered arrangement.
6. A dust-removing water curtain cabinet according to any one of claims 1-5, characterized in that a spraying device is arranged between the filtering area and the air outlet.
7. The dust-removing water curtain cabinet according to claim 6, wherein the spraying device comprises a main spraying pipe and a plurality of auxiliary spraying pipes which are distributed at the top of the filtering area at intervals, one end of the main spraying pipe is used for penetrating through the side wall of the cabinet body and connecting with external high-pressure water supply equipment, the other end of the main spraying pipe is communicated with one end of the plurality of auxiliary spraying pipes, the other end of the auxiliary spraying pipe is provided with a main spray head, a plurality of auxiliary spray heads which are distributed at intervals are arranged on the auxiliary spraying pipe, and the main spraying pipe is provided with a first valve body.
8. The dust removing water curtain cabinet according to any one of claims 3 to 5, wherein the water pumping mechanism comprises a water pump and a main water pipe, the water pump is located in the pump tank, one end of the main water pipe is connected with the output end of the water pump, and the other end of the main water pipe is communicated with the water tank.
9. The dust-removing water curtain cabinet according to claim 8, wherein the main water pipe is provided with a second valve body, an auxiliary water pipe leading to the second door body is communicated with the main water pipe, the auxiliary water pipe is positioned below the second valve body, and a third valve body is arranged on the auxiliary water pipe.
10. The dust-removing water curtain cabinet according to any one of claims 1 to 5, wherein the air suction mechanism comprises an air suction fan and an air pipe, the air suction fan is connected with the air pipe in a matched mode, one end of the air pipe is communicated with the air outlet, and the other end of the air pipe is used for being connected with other filtering equipment.
CN202223425220.8U 2022-12-19 2022-12-19 Dust removal water curtain cabinet Active CN219168014U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223425220.8U CN219168014U (en) 2022-12-19 2022-12-19 Dust removal water curtain cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223425220.8U CN219168014U (en) 2022-12-19 2022-12-19 Dust removal water curtain cabinet

Publications (1)

Publication Number Publication Date
CN219168014U true CN219168014U (en) 2023-06-13

Family

ID=86663871

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223425220.8U Active CN219168014U (en) 2022-12-19 2022-12-19 Dust removal water curtain cabinet

Country Status (1)

Country Link
CN (1) CN219168014U (en)

Similar Documents

Publication Publication Date Title
CN109364661A (en) A kind of dust-extraction unit of concrete processing
CN213433738U (en) Vertical absorption tower of VOCs
CN220003446U (en) Dust removal and noise reduction device for building construction
CN219168014U (en) Dust removal water curtain cabinet
CN208786031U (en) A kind of smog collection and purification device
CN213912867U (en) Water film dust collecting equipment
CN211202038U (en) Colliery is dust collector in pit
CN209076349U (en) A kind of efficient wood furniture processing japanning room emission-control equipment
CN208032104U (en) A kind of efficient air filter
CN220531034U (en) Spray device of vibrating wire filter plate
CN210057782U (en) Multiple filtration type dust shaker
CN108786366A (en) A kind of efficient wood furniture processing japanning room emission-control equipment
CN214130772U (en) Environment-friendly chemical fertilizer production dust collector
CN219630952U (en) Flue gas grading type dust removal device
CN217613748U (en) Dust remover capable of achieving shunting dust removal
CN213556114U (en) Cross-flow type waste gas washing tower
CN214389485U (en) A dust collection device for waste gas treatment
CN210964476U (en) Dust collecting equipment with humidification structure
CN216604516U (en) A waste gas collection device that is used for cigarette factory to have clean function
CN221491992U (en) Released gas treatment device in ferrosilicon smelting process
CN221601566U (en) Environment-friendly dust removal equipment convenient for dust removal
CN217961893U (en) Dust collecting and processing device for aluminum fluoride workshop
CN219701414U (en) Dust removal pipeline device for semi-coke processing
CN214914591U (en) Pump-free water curtain dust remover
CN221207368U (en) Waste gas spraying filtration equipment that exhaust-gas treatment used

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant