CN215027502U - Precious metal refines and uses exhaust gas absorbing device - Google Patents
Precious metal refines and uses exhaust gas absorbing device Download PDFInfo
- Publication number
- CN215027502U CN215027502U CN202121339774.9U CN202121339774U CN215027502U CN 215027502 U CN215027502 U CN 215027502U CN 202121339774 U CN202121339774 U CN 202121339774U CN 215027502 U CN215027502 U CN 215027502U
- Authority
- CN
- China
- Prior art keywords
- water tank
- bevel gear
- exhaust pipe
- exhaust gas
- plate
- 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
Links
- 239000010970 precious metal Substances 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000002912 waste gas Substances 0.000 claims abstract description 29
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 20
- 229910000510 noble metal Inorganic materials 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 6
- 239000002274 desiccant Substances 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- -1 platinum group metals Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
A waste gas absorption device for precious metal extraction comprises a water tank with an opening on the side face and an exhaust pipe, wherein the exhaust pipe enters the water tank from the opening; the top of the water tank is provided with a second filtering device. The utility model discloses first filter equipment sets up at updraft ventilator's front end, and waste gas can be earlier through filtering like this, reduces waste gas to updraft ventilator's pollution, secondly, the utility model discloses an updraft ventilator slidable, conveniently clears up updraft ventilator, the third, the utility model discloses the dwell time of waste gas in the water tank can be prolonged to the water conservancy diversion passageway that sets up, improves waste gas filtering's effect.
Description
Technical Field
The utility model belongs to the technical field of noble metal production technique and specifically relates to a noble metal refines and uses waste gas absorbing device is related to.
Background
The noble metal mainly refers to 8 metal elements such as gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum). Most of these metals have bright colors, are quite resistant to chemicals, and are not easy to cause chemical reactions under ordinary conditions. In the metal recovery mode, a series of steps such as incineration, dissolution, filtration and the like are generally carried out, and a large amount of waste gas, such as chlorine, and toxic gas with strong pungent smell are generated in the processes of incineration, dissolution and the like, so that the waste gas is not treated, the environment is greatly damaged, and the safety production is not facilitated. In the prior art, a large amount of dust exists in the air draft device in the long-term use process, the cleaning is unchanged, and the air draft effect is influenced; moreover, the time for treating the exhaust gas is short, and the exhaust gas is difficult to be sufficiently absorbed and reduced, so that the efficiency of treating the exhaust gas is low. Therefore, an exhaust gas absorption device for precious metal refining is provided to solve the above problems.
Disclosure of Invention
To the above circumstances, for overcoming prior art's defect, the utility model provides a noble metal refines and uses exhaust gas absorption device is used for solving above-mentioned problem.
In order to achieve the purpose, the utility model provides a precious metal refines and uses waste gas absorbing device, including open-sided water tank (1) and exhaust column (2), exhaust column (2) from the opening part gets into inside water tank (1), the air inlet of exhaust column (2) is installed first filter equipment (6) and updraft ventilator along the water tank inside direction in proper order, first filter equipment (6) set up the front end at updraft ventilator, updraft ventilator includes slide mechanism (5) and updraft ventilator, updraft ventilator installs on slide mechanism (5); slide mechanism (5) are including fixed plate (9), spout, direction slide rail (10), the spout sets firmly on the inner wall of exhaust column (2), the cover is established in the spout in direction slide rail (10), the quantity of direction slide rail (10) is two, and two direction slide rail (10) symmetries are fixed at the both ends of fixed plate (9) inboard, ventilation mechanism installs on fixed plate (9).
The inner wall of the exhaust pipe (2) is provided with a groove along the horizontal direction, a return spring (12) is arranged in the groove, the return spring (12) is connected with a top plate (11), and the top plate (11) is symmetrically arranged at two ends of the outer side of the fixed plate (9) and used for supporting two ends of the fixed plate (9). When needs clearance updraft ventilator, can hold slide mechanism (5) earlier, then with roof (11) the slip of both sides to the recess in, inside slide mechanism (5) along spout roll-off exhaust column (2), updraft ventilator exposed, conveniently clears up updraft ventilator.
Preferably, the longitudinal section of the guide rail (10) is T-shaped.
The air outlet of the exhaust pipe (2) is arranged at the bottom of the water tank (1), and a flow guide channel is arranged at the bottom of the water tank (1); the diversion channel is used for guiding the waste gas coming out of the air outlet of the exhaust pipe (2) to stay in the water tank. And a second filtering device is arranged at the top of the water tank (1). The water tank (1) is also provided with a water inlet and a water outlet. The filter medium is convenient to replace.
Preferably, the water conservancy diversion passageway includes baffle (3) and guide plate (4) of setting between baffle (3) and water tank (1) bottom that the level set up, the one end and the outer wall connection of exhaust column (2) of baffle (3), the other end leaves the clearance with water tank (1) inner wall, guide plate (4) crisscross interval setting between baffle (3) and water tank (1) bottom.
Preferably, the first filtering device (6) comprises a pull buckle, a mounting plate, an ash-sticking net and an activated carbon net; a first slot and a second slot are formed in the side surface of the exhaust pipe (2); the pull buckle is fixedly connected to the top surface of the mounting plate, the dust adhering net and the activated carbon net are sequentially arranged at two ends of the mounting plate, the dust adhering net is connected with the first slot in a clamping mode, and the activated carbon net is connected with the second slot in a clamping mode. Waste gas passes through first filter equipment earlier and passes through updraft ventilator again, reduces waste gas to updraft ventilator's pollution.
Preferably, the second filtering device comprises a filter screen, and a drying agent is arranged on the filter screen to dry the treated exhaust gas, so as to obtain purified and dried gas.
Preferably, the air draft mechanism comprises a motor, a first bevel gear, a second bevel gear and fan blades, the motor is electrically fixed on a fixing plate (9), the first bevel gear is installed on an output shaft of the motor, the second bevel gear is fixedly connected with the fan blades, the second bevel gear is meshed with the first bevel gear, the second bevel gear is rotatably connected with the fixing plate (9), the motor can drive the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the fan blades to rotate and generate negative pressure, and waste gas is pumped into the air draft tube (2).
Has the advantages that:
1. the utility model discloses first filter equipment sets up the front end at updraft ventilator, and waste gas can pass through first filter equipment earlier and pass through updraft ventilator again like this, reduces waste gas to updraft ventilator's pollution.
2. The utility model discloses updraft ventilator slidable, the convenience is cleared up updraft ventilator.
3. The utility model discloses be equipped with the water conservancy diversion passageway in the water tank, receive the restriction of guide plate when the waste gas that gets into the water tank flows, prolonged the dwell time of waste gas in the water tank, improved the filter effect.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the air extractor in a slid-out configuration.
Fig. 3 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.
Fig. 4 is the schematic view of the connecting structure of the guide sliding rail and the sliding chute of the present invention.
In the figure: the device comprises a water tank 1, an exhaust pipe 2, a baffle 3, a guide plate 4, a sliding mechanism 5, a first filtering device 6, an ash dipping net 7, an activated carbon net 8, a fixing plate 9, a guide sliding rail 10, a top plate 11 and a return spring 12.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying fig. 1-4.
As shown in fig. 1, the utility model discloses a noble metal refines and uses exhaust gas absorption device, including open sides's water tank 1 and exhaust column 2, inside exhaust column 2 got into water tank 1 from the opening part, the junction of exhaust column 2 and water tank 1 was equipped with the water proof cell body, was equipped with the air vent on the water proof cell body. First filter equipment 6 and updraft ventilator are installed in proper order along the inside direction of water tank to the air inlet of exhaust column 2, and first filter equipment 6 sets up the front end at updraft ventilator, and exhaust gas passes through first filter equipment earlier and passes through updraft ventilator again, reduces exhaust gas to updraft ventilator's pollution. The air outlet of the exhaust pipe 2 is arranged at the bottom of the water tank 1, and a flow guide channel is arranged at the bottom of the water tank 1; the water conservancy diversion passageway includes baffle 3 and the guide plate 4 of setting between baffle 3 and water tank 1 bottom that the level set up, and the one end of baffle 3 is connected with the outer wall of exhaust column 2, and the other end leaves the clearance with 1 inner wall of water tank, and guide plate 4 is crisscross the interval setting between baffle 3 and water tank 1 bottom. Preferably, the number of the guide plates 4 is three, the first guide plate and the second guide plate incline at a certain angle and stand at the bottom of the water tank at a certain distance, and the third guide plate inclines at a certain angle and is fixed on the lower end face of the baffle 3. The number of the guide plates 4 can be more than three according to the size of the water tank. The waste gas entering the water tank is limited by the guide plate 4 when flowing, so that the retention time of the waste gas in the water tank is prolonged, and the filtering effect is improved.
The top of the water tank 1 is provided with an opening, the opening is provided with a second filtering device, the second filtering device comprises a filter screen, and a drying agent is arranged on the filter screen to dry the purified gas, so that the purified and dried gas is obtained. The water tank 1 is also provided with a water inlet and a water outlet, so that the filter medium can be conveniently replaced.
As shown in fig. 2, the air draft device comprises a sliding mechanism 5 and an air draft mechanism, the sliding mechanism 5 comprises a sliding chute, two guide sliding rails 10 and a fixing plate 9, the sliding chute is fixedly arranged on the inner wall of the air draft pipe 2, the guide sliding rails 10 are sleeved in the sliding chute, the number of the guide sliding rails 10 is two, the two guide sliding rails 10 are symmetrically fixed at two ends of the inner side of the fixing plate 9, and the air draft mechanism is arranged on the fixing plate 9. As shown in fig. 4, the head of the guide rail 10 has a T-shaped structure. The sliding groove can be plate-shaped and tubular, the guide sliding rail 10 can be plate-shaped and tubular correspondingly, and the guide sliding rail 10 is sleeved in the sliding groove and can move along the sliding groove.
As shown in fig. 3, the inner wall of the exhaust pipe 2 is provided with a groove along the horizontal direction, a return spring 12 is arranged in the groove, one end of the return spring 12 is connected with a top plate 11, and the top plate 11 is symmetrically arranged at two ends of the outer side of the fixing plate 9 and used for supporting two ends of the fixing plate 9. When needs clearance updraft ventilator, can hold slide mechanism 5 earlier, then with the roof 11 slip of both sides in the recess, inside slide mechanism 5 along spout roll-off exhaust column 2, updraft ventilator exposed, conveniently clears up updraft ventilator.
The first filtering device 6 comprises a pull buckle, a mounting plate, an ash-dipping net and an activated carbon net; a first slot and a second slot are formed in the side surface of the exhaust pipe 2; the pull buckle is fixedly connected to the top surface of the mounting plate, the dust dipping net and the activated carbon net are sequentially arranged at two ends of the mounting plate, the dust dipping net is clamped with the first slot, and the activated carbon net is clamped with the second slot. When the waste gas passes through the ash-sticking net 7, ash and colored substances in the waste gas can be stuck on the ash-sticking net 7, other substances are continuously transported through the ash-sticking net 7, and when the waste gas is transported to the activated carbon net 8, the activated carbon net 8 absorbs and purifies some harmful substances and odor in the waste gas.
The concrete air draft mechanism comprises a motor, a first bevel gear, a second bevel gear and fan blades, the motor is electrically fixed on a fixing plate 9, the first bevel gear is installed on an output shaft of the motor, the second bevel gear is fixedly connected with the fan blades, the second bevel gear is meshed with the first bevel gear and is connected with the fixing plate 9 in a rotating mode, the motor can drive the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the fan blades to rotate and generate negative pressure, and waste gas is pumped into an air draft tube 2.
The utility model discloses a first filter equipment sets up at updraft ventilator's front end, and waste gas can be earlier through filtering like this, reduces waste gas to updraft ventilator's pollution, secondly, the utility model discloses an updraft ventilator slidable, conveniently clears up updraft ventilator, the third, the utility model discloses the dwell time of waste gas in the water tank can be prolonged to the water conservancy diversion passageway that sets up, improves waste gas filtering's effect. Finally, it should be noted that: although the present invention has been described in detail, it will be apparent to those skilled in the art that modifications may be made to the embodiments of the invention as described above, and equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The waste gas absorption device for noble metal extraction is characterized by comprising a water tank (1) with an opening on the side surface and an exhaust pipe (2), wherein the exhaust pipe (2) enters the water tank (1) from the opening, a first filtering device (6) and an air draft device are sequentially arranged at an air inlet of the exhaust pipe (2) along the direction inside the water tank, the air draft device comprises a sliding mechanism (5) and an air draft mechanism, and the air draft mechanism is arranged on the sliding mechanism (5); the air outlet of the exhaust pipe (2) is arranged at the bottom of the water tank (1), and a flow guide channel is arranged at the bottom of the water tank (1); and a second filtering device is arranged at the top of the water tank (1).
2. The exhaust gas absorption device for noble metal extraction as recited in claim 1, wherein the sliding mechanism (5) comprises a fixed plate (9), a sliding chute and a guide sliding rail (10), the sliding chute is fixedly arranged on the inner wall of the exhaust pipe (2), the guide sliding rail (10) is sleeved in the sliding chute, the guide sliding rail (10) is symmetrically fixed at two ends of the inner side of the fixed plate (9), and the exhaust mechanism is arranged on the fixed plate (9).
3. The exhaust gas absorption device for refining noble metals according to claim 2, wherein the inner wall of the exhaust pipe (2) is provided with a groove along the horizontal direction, a return spring (12) is arranged in the groove, the return spring (12) is connected with a top plate (11), and the top plates (11) are symmetrically arranged at two ends of the outer side of the fixed plate (9) and used for supporting two ends of the fixed plate (9).
4. An apparatus for absorbing exhaust gas from precious metal smelting according to claim 2, wherein the head of said guide rail (10) has a T-shaped structure.
5. The exhaust gas absorption device for noble metal refining as recited in claim 1, wherein the flow guide channel comprises a baffle (3) horizontally arranged and a flow guide plate (4) arranged between the baffle (3) and the bottom of the water tank (1), one end of the baffle (3) is connected with the outer wall of the exhaust pipe (2), the other end of the baffle is spaced from the inner wall of the water tank (1), and the flow guide plate (4) is arranged between the baffle (3) and the bottom of the water tank (1) at staggered intervals.
6. The exhaust gas absorption device for refining noble metals as claimed in claim 1, wherein said first filtering means (6) comprises a tab, a mounting plate, an ash net and an activated carbon net; a first slot and a second slot are formed in the side surface of the exhaust pipe (2); the pull buckle is fixedly connected to the top surface of the mounting plate, the dust dipping net and the activated carbon net are sequentially arranged at two ends of the mounting plate, the dust dipping net is clamped with the first slot, and the activated carbon net is clamped with the second slot.
7. The exhaust gas absorption device for refining noble metals as claimed in claim 1, wherein the air draft mechanism comprises a motor, a first bevel gear, a second bevel gear and fan blades, the motor is electrically fixed on the fixing plate (9), the first bevel gear is installed on an output shaft of the motor, the second bevel gear is fixedly connected with the fan blades, the second bevel gear is meshed with the first bevel gear, and the second bevel gear is rotatably connected with the fixing plate (9).
8. The exhaust gas absorption apparatus for refining precious metals according to claim 1, wherein said second filter means includes a filter screen, and said filter screen is provided with a desiccant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339774.9U CN215027502U (en) | 2021-06-17 | 2021-06-17 | Precious metal refines and uses exhaust gas absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339774.9U CN215027502U (en) | 2021-06-17 | 2021-06-17 | Precious metal refines and uses exhaust gas absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215027502U true CN215027502U (en) | 2021-12-07 |
Family
ID=79203331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121339774.9U Active CN215027502U (en) | 2021-06-17 | 2021-06-17 | Precious metal refines and uses exhaust gas absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215027502U (en) |
-
2021
- 2021-06-17 CN CN202121339774.9U patent/CN215027502U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208865842U (en) | Environment-friendly type paint spray booth | |
| CN110773360A (en) | Environment-friendly paint spray booth | |
| CN215027502U (en) | Precious metal refines and uses exhaust gas absorbing device | |
| CN208612077U (en) | A kind of industrial waste gas circulation filter | |
| CN112197612A (en) | Built-in fire smoke decontamination device | |
| CN209918535U (en) | Safe type laboratory fume chamber clean system | |
| CN218458945U (en) | Automatic monitoring and purifying device for harmful gas in armored vehicle cabin | |
| CN212476245U (en) | Ozone pool | |
| CN114053855A (en) | Powerful desulfurization and denitrification labyrinth purification module | |
| CN210385394U (en) | Low-temperature plasma photocatalysis waste gas purifying equipment | |
| CN114774622A (en) | Steelmaking equipment based on low-carbon emission for steelmaking | |
| CN210448725U (en) | Light oxygen catalytic purification treatment equipment | |
| CN208320336U (en) | A kind of washing type cooperates with the purification device of processing weldering cigarette with charge type | |
| CA1303967C (en) | Combined fume scrubber/hood | |
| CN207755929U (en) | House exhaust processing purification system | |
| CN207471761U (en) | A kind of window air exhausting device exceeded interior prevention VOC | |
| CN110694443A (en) | High-voltage electrostatic photolysis purifying equipment | |
| CN217220702U (en) | Anticorrosive paint processing is with mixing of colors device | |
| CN213193170U (en) | High ozone UV ultraviolet ray light beam clarification plant | |
| CN214130917U (en) | Purification device for industrial waste gas treatment equipment | |
| CN219744416U (en) | Curing waste gas treatment system | |
| CN212594598U (en) | Emission reduction device for metallurgical equipment | |
| CN220939994U (en) | VOC treatment facility of oxygen boosting low concentration | |
| CN114733303B (en) | Medical waste instrument burns smoke and dust pollution-free processing apparatus | |
| CN215372051U (en) | Security alarm system for hydrogenation station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240403 Address after: 737199 No. 2 Jianshe Road, Jinchuan District, Jinchang City, Gansu Province (east of Beijing Road, west of Heya Road, south of Guiyang Road) Patentee after: Jinchuan Group Copper Gui Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |