CN114184034A - Converter coarse ash conveying scraper conveyor comprehensive protection device - Google Patents
Converter coarse ash conveying scraper conveyor comprehensive protection device Download PDFInfo
- Publication number
- CN114184034A CN114184034A CN202111556275.XA CN202111556275A CN114184034A CN 114184034 A CN114184034 A CN 114184034A CN 202111556275 A CN202111556275 A CN 202111556275A CN 114184034 A CN114184034 A CN 114184034A
- Authority
- CN
- China
- Prior art keywords
- converter
- scraper conveyor
- protection device
- inert gas
- ash conveying
- 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.)
- Pending
Links
- 239000011261 inert gas Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 9
- 239000003034 coal gas Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 4
- 238000004880 explosion Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a converter coarse ash conveying scraper conveyor comprehensive protection device, which comprises a converter scraper conveyor, wherein the top of the converter scraper conveyor is connected with an ash inlet, a large block intercepting device is arranged at the ash inlet, one end of the converter scraper conveyor is provided with a head wheel driving device, the other side of the converter scraper conveyor is provided with a tail wheel tensioning device, the scraper conveyor head wheel driving device is provided with an overload compensation protection device and a limiting stop device, and the scraper conveyor tail wheel tensioning device is provided with a chain breakage detection device and used for solving the technical problem of overhigh failure rate of the scraper conveyor; the converter scrapes trigger both ends and is equipped with inert gas and gets into gas device, converter scrapes trigger head and tail axle both sides rotary seal department and sets up inert gas blowback sealing device for solve the present technical problem that exists if the coal gas concentration in the scraper blade machine reaches the explosion interval, then lead to the danger of exploding easily.
Description
Technical Field
The invention mainly relates to the technical field of scraper conveyors, in particular to a comprehensive protection device of a converter coarse ash conveying scraper conveyor.
Background
For a long time, the working condition of the intersection of the lower section of the converter evaporation cooling tower is extremely bad, the coarse ash conveying scraper conveyor is a key detection part, is key equipment related to whether the converter can normally produce or not, is also one of nodes with higher failure rate and important potential safety hazards, and once the scraper conveyor fails, light persons influence the production of the converter, and heavy persons cause the loss of blowing-out production.
Some mills reduce through strengthening post personnel daily inspection and scrape trigger trouble, but can not fundamentally solve the problem, scrape trigger during operation, because negative pressure convulsions effect, the converter evaporative cooling tower at top can be to scraping trigger passageway conveying coal gas, in case scrape trigger sealed not tight, outside air can get into and scrape trigger inside, and coal gas then leads to the danger of exploding easily satisfying under certain condition.
Disclosure of Invention
Technical problem to be solved by the invention
The invention provides a comprehensive protection device for a converter coarse ash conveying scraper conveyor, which is used for solving the technical problem that explosion danger is easily caused if the scraper conveyor is not tightly sealed in the background technology.
Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a converter coarse ash carries scrapes trigger comprehensive protection device, scrapes the trigger including the converter, the converter scrapes the trigger top and connects into the ash mouth, it is equipped with bold intercepting device to advance ash mouth department, the converter scrapes trigger one end and is equipped with head pulley drive arrangement, and the opposite side is equipped with tail pulley overspeed device tensioner, the converter scrapes the trigger both ends and is equipped with inert gas income gas device, the converter scrapes trigger head-tail axle both sides rotary seal department and sets up inert gas blowback sealing device.
Further, the inert gas includes nitrogen.
Further, the big block intercepting device comprises a weighing seat, and the top of the weighing seat is detachably connected with the grid plate.
Furthermore, the end part of the inert gas inlet device is connected with a nozzle assembly, and the end part of the nozzle assembly is connected with a coal gas oxygen content detector.
Furthermore, the side surface of the head wheel driving device is connected with a driving compensation device, the driving compensation device comprises a whistle-shaped connecting plate, the whistle-shaped connecting plate is connected with a flange of the head wheel driving device, the end part of the whistle-shaped connecting plate is connected with a lifting gland, an elastic piece is arranged on the inner side of the lifting gland, the elastic piece is connected with a core rod, two sides of the top of the core rod are connected with a combining cap, and the bottom of the combining cap is detachably connected with a base and a hanging bracket.
Furthermore, one side of the top of the whistle-shaped connecting plate is provided with an over-moment protection device.
Furthermore, two sides of the tail pulley tensioning device are connected with a tail broken chain detection protection device.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention has reasonable design, utilizes the mutual cooperation of the inert gas inlet device and the inert gas back-blowing sealing device, effectively controls the coal gas concentration interval in the scraper blade machine of the converter and prevents accidents;
the method is characterized in that a large amount of mixture of water vapor and nitrogen is sprayed into an evaporative cooling tower to cool the dust-containing coal gas, large lumps are formed on the wall of the tower at variable time, and the tower wall is frequently collapsed and falls into a scraper conveyor, so that excessive loading of blocked materials is caused to damage the scraper conveyor, the normal production of the converter is influenced, and the large lumps can be removed in time by arranging a large interception device, so that the normal operation of the converter is effectively promoted;
the normal operation of the scraper is ensured by arranging the driving compensation device and the over-torque protection device, the service life of the scraper is further prolonged, the normal production of the system is met, and the production requirement of a modern large workshop is completely met;
the tail broken chain detection protection device sends out alarm and shutdown in time when the chain of the scraper conveyor breaks, and informs workers to check and process faults;
through mutual cooperation among all devices, the technical problem that the converter scraper easily breaks down frequently at high frequency under the severe coarse ash conveying environment is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a driving device according to the present invention;
FIG. 3 is an enlarged schematic view of FIG. 1 at A according to the present invention;
FIG. 4 is a schematic front cross-sectional view of the present invention;
fig. 5 is a schematic structural diagram of a driving device of the present invention.
Reference numerals
1. A converter scraper; 2. an ash inlet; 3. a bulk intercepting device; 31. a weighing seat; 32. a grid plate; 4. a head wheel drive device; 41. a drive compensation device; 42. a whistle-shaped connecting plate; 421. an over-torque protection device; 43. lifting the gland; 44. an elastic member; 45. a core rod; 5. a tail pulley tensioning device; 51. a tail broken chain detection protection device; 6. an inert gas inlet device; 61. a nozzle assembly; 62. a gas oxygen content detector; 7. inert gas back flushing sealing device.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of providing a more thorough disclosure of the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "provided," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
Referring to the attached drawings 1-5, a converter coarse ash conveying scraper conveyor comprehensive protection device comprises a converter scraper conveyor 1, wherein the top of the converter scraper conveyor 1 is connected with an ash inlet 2, a large block intercepting device 3 is arranged at the ash inlet 2, one end of the converter scraper conveyor 1 is provided with a head wheel driving device 4, the other end of the converter scraper conveyor 1 is provided with a tail wheel tensioning device 5, two ends of the converter scraper conveyor 1 are provided with inert gas inlet devices 6, and rotary sealing positions at two sides of a head shaft and a tail shaft of the converter scraper conveyor 1 are provided with inert gas back-blowing sealing devices 7, the device can transport converter coarse ash at the top, in order to prevent the gas concentration inside the converter scraper conveyor 1 from reaching an explosion interval, the inert gas inlet devices 6 can fill inert gas into the converter scraper conveyor 1 to dilute the gas, and the inert gas back-blowing sealing devices 7 spray inert gas at a rotating shaft to form an air seal, because negative pressure exists in the converter scraper conveyor 1, inert gas is sucked in, external air is prevented from entering the scraper conveyor, and the gas concentration in the converter scraper conveyor 1 is further prevented from being too high.
The inert gas comprises nitrogen, the nitrogen is low in manufacturing cost and convenient to purchase, and explosion can be effectively prevented after the nitrogen is mixed with the coal gas.
The end part of the inert gas inlet device 6 is connected with a nozzle assembly 61, the end part of the nozzle assembly 61 is connected with a gas oxygen content detector 62, the inert gas inlet device 6 is connected with the nozzle assembly 61 through a high-pressure hose, the gas oxygen content detector 62 at the end part detects the oxygen content in the converter scraper machine 1, and the oxygen content in the converter scraper machine 1 is adjusted by matching with the inert gas inlet device 6.
The side surface of the head wheel driving device 4 is connected with a driving compensation device 41, the driving compensation device 41 comprises a whistle-shaped connecting plate 42, the whistle-shaped connecting plate 42 is connected with a flange of the head wheel driving device 4, the end part of the whistle-shaped connecting plate 42 is connected with a lifting gland 43, an elastic part 44 is arranged on the inner side of the lifting gland 43, the elastic part 44 is connected with a mandrel 45, two sides of the top of the mandrel 45 are connected with a combining cap 46, the bottom of the combining cap 46 is detachably connected with a base and a hanging bracket, the head wheel driving device 4 adopts a K-series hard tooth surface high-strength speed reducer, if the converter scraper 1 is subjected to overweight loading or partial foreign body blocking in the operation process, the head wheel driving device 4 is led to not move the converter scraper 1, at the moment, the connection part of the whistle-shaped connecting plate and the lifting gland 43 can be tilted upwards, the elastic part 44 at the bottom gives downward tensile force to the top on the mandrel 45, until the head wheel driving device 4 drives the scraper to rotate again.
And an over-moment protection device 421 is arranged on one side of the top of the whistle-shaped connecting plate 42, when the head wheel driving device 4 drives the fixed scraper track to rotate, the moment exceeds the range of the driving compensation device 41, and exceeds the set swing amplitude, the end part of the whistle-shaped connecting plate raises to cover the front end of the over-moment protection device 421, and the over-moment protection device 421 gives an alarm and stops the machine to inform a worker to check and process faults.
The tail wheel tensioning device 5 both sides are connected afterbody chain breakage and are detected protection device 51, afterbody chain breakage detects protection device 51 and is the chain inductive switch design in double-row chain both sides, and when one side or both sides broke, this side or both sides chain break away from the tail wheel, and the closed type inductive switch that detects the chain sends out chain breakage alarm signal, and parallelly connected tapered end wheel drive 4 stop work, and the notice staff checks and handles the trouble, and this device utilizes and detects the rotation of being close afterbody chain breakage detection protection device 51 from the driving wheel, when the rotational speed far is less than the rated revolution of head wheel drive arrangement 4 or stall, through time relay delay several seconds after output alarm shutdown signal.
The above-mentioned embodiments only express a certain implementation mode of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The utility model provides a converter coarse dust is carried and is scraped trigger integrated protection device which characterized in that: scrape trigger (1) including the converter, the converter is scraped trigger (1) top and is connected into ash mouth (2), it is equipped with bold intercepting device (3) to advance ash mouth (2) department, converter is scraped trigger (1) one end and is equipped with head pulley drive arrangement (4), and the opposite side is equipped with tailwheel overspeed device tensioner (5), converter is scraped trigger (1) both ends and is equipped with inert gas income gas device (6), converter is scraped trigger (1) head-tail axle both sides rotary seal department and sets up inert gas blowback sealing device (7).
2. The comprehensive protection device of the converter coarse ash conveying scraper conveyor according to claim 1, characterized in that: the inert gas comprises nitrogen.
3. The comprehensive protection device of the converter coarse ash conveying scraper conveyor according to claim 1, characterized in that: the large block intercepting device (3) comprises a weighing seat (31), and the top of the weighing seat (31) is detachably connected with a grid plate (32).
4. The comprehensive protection device of the converter coarse ash conveying scraper conveyor according to claim 1, characterized in that: the end part of the inert gas inlet device (6) is connected with a nozzle assembly (61), and the end part of the nozzle assembly (61) is connected with a coal gas oxygen content detector (62).
5. The comprehensive protection device of the converter coarse ash conveying scraper conveyor according to claim 1, characterized in that: the head wheel driving device (4) is characterized in that a driving compensation device (41) is connected to the side face of the head wheel driving device (4), the driving compensation device (41) comprises a whistle-shaped connecting plate (42), the whistle-shaped connecting plate (42) is connected to a flange of the head wheel driving device (4), the end of the whistle-shaped connecting plate (42) is connected with a lifting gland (43), an elastic piece (44) is arranged on the inner side of the lifting gland (43), the elastic piece (44) is connected with a core rod (45), two sides of the top of the core rod (45) are connected with a combining cap (46), and the bottom of the combining cap (46) is detachably connected with a base and a hanging bracket.
6. The comprehensive protection device of the converter coarse ash conveying scraper conveyor according to claim 5, characterized in that: one side of the top of the whistle-shaped connecting plate (42) is provided with an over-torque protection device (421).
7. The comprehensive protection device of the converter coarse ash conveying scraper conveyor according to claim 1, characterized in that: and two sides of the tail pulley tensioning device (5) are connected with a tail broken chain detection protection device (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556275.XA CN114184034A (en) | 2021-12-18 | 2021-12-18 | Converter coarse ash conveying scraper conveyor comprehensive protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556275.XA CN114184034A (en) | 2021-12-18 | 2021-12-18 | Converter coarse ash conveying scraper conveyor comprehensive protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114184034A true CN114184034A (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111556275.XA Pending CN114184034A (en) | 2021-12-18 | 2021-12-18 | Converter coarse ash conveying scraper conveyor comprehensive protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114184034A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3323979A1 (en) * | 1983-07-02 | 1985-01-10 | Mannesmann AG, 4000 Düsseldorf | Converter arrangement |
| KR20090030518A (en) * | 2007-09-20 | 2009-03-25 | 주식회사 포스코 | Guide block control apparatus of hot crusher for sintering machine |
| CN206459510U (en) * | 2016-12-23 | 2017-09-01 | 北方重工集团有限公司 | A kind of drying grate splicing plate |
| CN107841593A (en) * | 2016-09-21 | 2018-03-27 | 宝山钢铁股份有限公司 | A kind of auxiliary material nitrogen seal device and its control method |
| CN109250387A (en) * | 2018-09-03 | 2019-01-22 | 芜湖华洁环保设备有限公司 | A kind of anti-clogging bucket elevator |
| CN109282642A (en) * | 2018-09-25 | 2019-01-29 | 西安三瑞实业有限公司 | A kind of indirect heating type rotary furnace of drying brown coal |
| CN110286051A (en) * | 2019-06-28 | 2019-09-27 | 嘉兴怀莲贸易有限公司 | A kind of high-precision 3D model foundation system that details is scalable |
| CN110656218A (en) * | 2019-08-01 | 2020-01-07 | 广东韶钢松山股份有限公司 | Converter raw material feeding chute flue gas locking device and working method |
| CN111121462A (en) * | 2020-01-15 | 2020-05-08 | 扬州泰富特种材料有限公司 | Grate plate anti-blocking alarm resetting device |
| CN211079216U (en) * | 2019-11-01 | 2020-07-24 | 日照钢铁控股集团有限公司 | Novel converter dry process dust removal evaporation is cold and is prevented collapsing device |
| CN213386397U (en) * | 2020-10-12 | 2021-06-08 | 姚伏龙 | Scrape trigger chain breakage and jam early warning protection system |
-
2021
- 2021-12-18 CN CN202111556275.XA patent/CN114184034A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3323979A1 (en) * | 1983-07-02 | 1985-01-10 | Mannesmann AG, 4000 Düsseldorf | Converter arrangement |
| KR20090030518A (en) * | 2007-09-20 | 2009-03-25 | 주식회사 포스코 | Guide block control apparatus of hot crusher for sintering machine |
| CN107841593A (en) * | 2016-09-21 | 2018-03-27 | 宝山钢铁股份有限公司 | A kind of auxiliary material nitrogen seal device and its control method |
| CN206459510U (en) * | 2016-12-23 | 2017-09-01 | 北方重工集团有限公司 | A kind of drying grate splicing plate |
| CN109250387A (en) * | 2018-09-03 | 2019-01-22 | 芜湖华洁环保设备有限公司 | A kind of anti-clogging bucket elevator |
| CN109282642A (en) * | 2018-09-25 | 2019-01-29 | 西安三瑞实业有限公司 | A kind of indirect heating type rotary furnace of drying brown coal |
| CN110286051A (en) * | 2019-06-28 | 2019-09-27 | 嘉兴怀莲贸易有限公司 | A kind of high-precision 3D model foundation system that details is scalable |
| CN110656218A (en) * | 2019-08-01 | 2020-01-07 | 广东韶钢松山股份有限公司 | Converter raw material feeding chute flue gas locking device and working method |
| CN211079216U (en) * | 2019-11-01 | 2020-07-24 | 日照钢铁控股集团有限公司 | Novel converter dry process dust removal evaporation is cold and is prevented collapsing device |
| CN111121462A (en) * | 2020-01-15 | 2020-05-08 | 扬州泰富特种材料有限公司 | Grate plate anti-blocking alarm resetting device |
| CN213386397U (en) * | 2020-10-12 | 2021-06-08 | 姚伏龙 | Scrape trigger chain breakage and jam early warning protection system |
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Application publication date: 20220315 |