CN216444442U - Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism - Google Patents
Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism Download PDFInfo
- Publication number
- CN216444442U CN216444442U CN202122167912.6U CN202122167912U CN216444442U CN 216444442 U CN216444442 U CN 216444442U CN 202122167912 U CN202122167912 U CN 202122167912U CN 216444442 U CN216444442 U CN 216444442U
- Authority
- CN
- China
- Prior art keywords
- belt
- sensor
- rotating speed
- loosening
- conveyer belt
- 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
Images
Abstract
The utility model discloses a conveyor belt looseness indirect monitoring device and a conveyor belt looseness detecting and tensioning mechanism, and the key points of the innovative scheme are as follows: add this monitoring devices, including speed sensor, sensor support, rotational speed induction point (roller end plate hole promptly), integral erection is on the bearing slide frame, speed sensor corresponds the rotational speed induction point, through the indirect equivalence inference conveyer belt elasticity degree of the rotational speed change of dynamic automatic monitoring driven cylinder, when the overproof (the overproof of conveyer belt rate of tension equivalence) auto-stop of driven cylinder rotational speed to the tensioning conveyer belt. The belt loosening and tensioning mechanism solves the technical problems that the loosening of the conveying belt is difficult to judge by human eyes, the monitoring result of human eyes is lagged, the labor intensity is high, the conveying belt seriously loosens filter cakes to fill the conveying belt, the waste of product filter cakes is caused, the sanitation of the field environment is influenced, and the tightness of the conveying belt is very difficult to measure directly on line by using the monitoring device; the product has the functions of finding belt loosening and solving the belt loosening problem, and can increase the product expansion.
Description
Technical Field
The utility model belongs to the technical field of belt conveyors of automatic filter press units (patent classification number B01D 25/12), and relates to a conveyor belt looseness monitoring and tensioning mechanism.
Background
The filter press is a pressurized filtering device with multiple filtering chambers operated intermittently; the automatic filter press is a filter press which is integrated mechanically, electrically and hydraulically and intelligently controlled by a PLC (programmable logic controller); the automatic filter press unit comprises an automatic filter press, a material conveying pump and a belt type filter cake conveyor; an automatic filter press mainly comprises a double-beam frame, a filter plate pressing mechanism, a multi-filter-chamber filtering mechanism, a plate pulling and cake discharging mechanism, a filter cloth cleaning mechanism, a turning plate liquid receiving mechanism and a PLC program control system, and is suitable for solid-liquid separation of various suspensions (namely a mixture of liquid and solid particles); a belt type filter cake conveyor mainly comprises a frame, a conveying belt, a carrier roller, a driving roller, a driven roller, a belt tensioning device and a driving device, and is arranged below a filter press and used for conveying a filter cake obtained after solid-liquid separation to a preset place.
The working process of the automatic filter press unit is as follows: the material conveying pump pressurizes and inputs the solid-liquid mixed material into the multi-filter chamber filtering mechanism, so that pressure difference is formed between two sides of the filter cloth, low-pressure static filtering is performed, particles in the material are intercepted by the filter cloth to form filter cakes in the filter chambers, filtrate passes through the filter cloth and flows out of the liquid outlet holes, the filter plates are pulled open by the pull plate cake unloading mechanism to realize gravity cake unloading, the filter cakes fall on the belt type filter cake conveyor, and the conveyor conveys the filter cakes to a preset place.
The belt type filter cake conveyor is characterized in that an annular conveying belt is sleeved on a driving roller and a driven roller, and the driving roller and the driven roller synchronously drive the annular conveying belt to circularly run by virtue of friction force (friction transmission); but actually the conveyer belt can loose the transmission frictional force and reduce for a long time, its elasticity degree of conveyer belt circulating operation's dynamic process is difficult to measure with instrument directly, and when the staff found the conveyer belt and the phenomenon of skidding of initiative cylinder and driven cylinder, the initiative cylinder rotated asynchronous (the conveyer belt is lax, driven cylinder rotational speed slows down) with the driven cylinder, leads to the filter cake on the conveyer belt inhomogeneous, even some local filter cake to pile up out the conveyer belt, then needs to utilize belt overspeed device tensioner to tension the conveyer belt again.
The existing belt type filter cake conveyor has the following defects: the automatic monitoring device for the loosening of the conveying belt is lacked, the monitoring result of human eyes is often lagged, the general loosening of the belt (the belt does not slip seriously) is difficult to see by human eyes, the loosening is difficult to judge immediately, the serious loosening of the belt (the filter cake is full of the conveying belt) is known afterwards, the attention of workers for monitoring the loosening of the belt by human eyes needs to be concentrated, the labor intensity is high, the waste of the filter cake of products is caused once the machine is stopped untimely, and the sanitation of the field environment is influenced; the technical problem that people always desire to solve but cannot succeed all the time is to directly and automatically measure the tightness degree of a conveying belt in operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the existing belt type filter cake conveyor, solve the technical problems that the automatic monitoring device for the loosening of the conveying belt is lacked, the eyes of a person who starts to loosen the conveying belt are difficult to judge, the monitoring result of the eyes of the person is lagged, the labor intensity is higher, the filter cake is seriously loosened by the conveying belt and overflows out of the conveying belt, the waste of the filter cake of products is caused, the sanitation of the field environment is influenced, and the tightness of the conveying belt is very difficult to measure directly on line, and provide an indirect monitoring device for the loosening of the conveying belt and a belt loosening and tensioning mechanism of the conveyor; the utility model relates to a conveyor belt loosening and tensioning mechanism, in particular to a conveyor belt loosening and tensioning mechanism with an indirect monitoring device for the loosening of a conveying belt, which is short for the reason that the number of characters of a patent name is limited.
The utility model solves the problems of the prior art and adopts the brand new technical scheme that: the utility model provides a conveyer belt slack indirect monitoring device (hereinafter for short: conveyer belt survey loose device), the main points of general technical scheme are, the overall structure of innovation compares with prior art promptly, it has outstanding substantive characteristics: on the basis of the existing belt tensioning device, a conveying belt looseness indirect monitoring device is additionally arranged, and comprises a rotating speed sensor, a sensor support and a rotating speed sensing point (namely a roller end plate hole), the rotating speed sensor is integrally arranged on a bearing slideway frame and corresponds to the rotating speed sensing point, the tightness degree of the conveying belt is indirectly and equivalently inferred by dynamically and automatically monitoring the rotating speed change of a driven roller, and when the rotating speed of the driven roller is out of tolerance (namely the equivalent conveying belt tension is out of tolerance), the belt is automatically stopped so as to tension the conveying belt; therefore, the technical problems that the loosening automatic monitoring device for the conveying belt is lacked, the conveying belt is difficult to judge by eyes when the conveying belt starts to loosen, the monitoring result of the eyes is lagged, the labor intensity is high, the filter cake which is seriously loosened by the conveying belt is full of the conveying belt, the waste of product filter cakes is caused, the sanitation of the field environment is influenced, and the tightness of the conveying belt is very difficult to measure directly on line are solved.
The specific design scheme is as follows: the rotating speed sensor is an NBN25-30GM65-E2 type proximity sensor; the sensor support is a stainless steel plate type adjustable support bent twice, the upper end of the sensor support is provided with a sensor hole corresponding to the rotating speed sensor, the lower end of the sensor support is provided with a double-support adjusting long hole, and the length of the sensor support corresponds to the distance between the left side of the bearing slide way frame and the roller end plate hole; the rotating speed induction points are four roller end plate holes which are uniformly distributed on the driven roller.
The connection relation of the main parts is as follows: for convenience of explanation, a bearing slideway frame of the belt conveyor closely related to the conveying belt looseness measuring device is additionally arranged; the sensor support is adjustably installed on the left frame of the bearing slideway frame, the rotating speed sensor is installed in a sensor hole of the sensor support and is externally connected with a PLC program control system, and the installation position of the sensor support is adjusted to enable the rotating speed sensor to correspond to the end plate hole of the roller.
The working principle and the process of the conveyer belt looseness measuring device are as follows: (1) when the conveyer belt is tensioned, the conveyer belt and the driven roller do not slide relatively, the conveyer belt drives the driven roller to rotate (the designed rotating speed is 2s for one circle), four rotating speed sensing points are sensed in the rotating speed sensor 2s, namely equivalent conveyer belt tensioning is realized, and the sensor does not act; (2) when the conveyer belt is lax, the conveyer belt skids with driven cylinder, driven cylinder rotational speed slows down (rotational speed surpasses to rotatory a week more than 2.2 s), just sense quartic rotational speed induction point more than speed sensor 2.2s, equivalent conveyer belt is lax promptly, the sensor then transmits the out-of-tolerance signal to PLC programmable system, PLC programmable system accepts the out-of-tolerance signal of cubic in succession and controls arm-tie cake unloading mechanism and belt formula filter cake conveyer stop work immediately, warn the staff and tension the conveyer belt again, effectively avoid the filter cake to pile up full conveyer belt.
The utility model also provides a conveyor belt loosening and tensioning mechanism, which uses the conveyor belt loosening indirect monitoring device provided by the utility model; the belt loosening and tensioning mechanism mainly comprises a conveying belt loosening and measuring device and a belt tensioning device, wherein the belt tensioning device comprises a bearing slideway frame, a jacking screw rod, a jacking nut and a movable bearing; the tightness of the conveyer belt can be automatically and indirectly monitored in an on-line equivalent manner, and the conveyer belt can be manually tensioned.
The indirect monitoring device for the loosening of the conveying belt and the belt loosening and tensioning mechanism of the conveyor have the advantages of simple and ingenious structure, indirect equivalent monitoring, automatic online loosening measurement, adjustable belt tightness, reliable performance and convenience in installation; the automatic loosening and detecting device has the advantages that the loosening and detecting device for the conveying belt is additionally arranged, namely the rotating speed change of the driven roller is automatically monitored on line to indirectly infer the tightness degree of the conveying belt, and when the rotating speed of the driven roller is out of tolerance (namely the tension degree of the conveying belt is out of tolerance), the automatic stopping device is automatically used for tensioning the conveying belt; the technical problem that people always desire to solve but can not obtain successful online direct automatic measurement of the tightness of the conveyer belt is very difficult is solved, and product development can improve efficiency.
Drawings
Fig. 1 is a schematic front view of an indirect monitoring device for the slack of a conveyor belt according to the present invention.
Fig. 2 is a right-side schematic view of the conveyor belt slack indirect monitoring device of the utility model.
Fig. 3 is a schematic view of a sensor bracket of the indirect monitoring device for the slack of the conveying belt.
FIG. 4 is a schematic view of a conveyor belt loosening and tightening mechanism according to the present invention.
FIG. 5 is a schematic view of a belt tensioner of the conveyor belt slack measurement and tensioning mechanism of the present invention.
FIG. 6 is an assembly schematic view of the conveyor belt loosening and tightening mechanism of the present invention and a corresponding belt-type cake conveyor.
FIG. 7 is a schematic view of the assembly of an automatic filter press assembly according to the present invention.
Reference numerals: the method comprises the following steps of 1-a rotating speed sensor, 2-a sensor bracket, 3-a sensor hole, 4-a bracket adjusting long hole, 5-a conveying belt looseness indirect monitoring device (a conveying belt looseness measuring device or the utility model), 6-a driven roller, 7-a belt tensioning device (a belt tightening device for short), 8-a driving roller, 9-a conveying belt, 10-a belt type filter cake conveyor (a belt conveyor for short), 11-an automatic filter press, 12-a plate pulling and cake discharging mechanism, 13-a PLC program control system, 14-a roller end plate hole (a rotating speed sensing point), 15-a conveyor belt looseness measuring and tensioning mechanism (a belt looseness measuring and tensioning mechanism for short), 16-a bearing slideway frame, 17-a tightening screw rod, 18-a tightening nut and 19-a movable bearing.
Detailed Description
The technical solution in the embodiment of the present invention is described below with reference to the attached drawings in the embodiment of the indirect monitoring device for belt slack and the belt slack measuring and tensioning mechanism of the conveyor of the present invention, and the described embodiment is only a part of the preferred embodiments of the present invention, but not all embodiments. All other embodiments, such as a conveyor belt slack measuring device with the same indirect slack measuring mode and a similar structure, which are not inventive by those skilled in the art based on the embodiments of the present invention, belong to the protection scope of the present invention.
Example 1
An indirect monitoring device 5 for the looseness of a conveying belt (a conveying belt looseness measuring device for short) has the main points of the innovative overall implementation scheme that: on the basis of the existing belt tensioning device, a conveying belt looseness indirect monitoring device 5 is additionally arranged and comprises a rotating speed sensor 1, a sensor support 2 and a rotating speed sensing point 14 (namely a roller end plate hole), the rotating speed sensor 1 is integrally arranged on a bearing slideway frame 16 and corresponds to the rotating speed sensing point 14, the tightness degree of a conveying belt 9 is indirectly and equivalently inferred by dynamically and automatically monitoring the rotating speed change of a driven roller 6, and when the rotating speed of the driven roller 6 is out of tolerance (namely the tension degree equivalent out of tolerance of the conveying belt 9), the automatic machine is automatically stopped so as to tension the conveying belt 9; specific embodiments are described in detail below.
The rotating speed sensor 1 is an NBN25-30GM65-E2 type proximity sensor and can detect the existence of metal; the rotation speed sensor 1 is installed in a sensor hole 3 of the sensor support 2 (corresponding to a roller end plate hole 14) and is externally connected with a PLC program control system 13, and is used for detecting the frequency of the roller end plate hole 14 in unit time (equivalently detecting the rotation speed of the driven roller 6 and the tightness of the conveying belt 9) and transmitting a roller rotation speed out-of-tolerance signal to the PLC program control system 13.
The sensor support 2 is a stainless steel plate type adjustable support bent twice, the upper end of the sensor support is provided with a sensor hole 3 corresponding to the rotating speed sensor 1, the lower end of the sensor support is provided with a double-support adjusting long hole 4, and the length of the sensor support 2 corresponds to the distance between the left side of the bearing slideway frame 16 and the roller end plate hole 14; the sensor support 2 is adjustably mounted on the left frame of the bearing slideway frame 16, and the mounting position of the sensor support 2 is adjusted to enable the rotating speed sensor 1 to correspond to the roller end plate hole 14; for the adjustable mounting of the rotation speed sensor 1.
The rotating speed induction points 14 are four uniformly distributed roller end plate holes 14 of the driven roller; the driven roller 6 of the belt conveyor 10 is mounted on a double movable bearing 19, roller end plate holes 14 at two ends of the driven roller correspond to the rotating speed sensor 1, and the roller end plate holes 14 can be detected by the rotating speed sensor 1 during the rotation of the roller and are used as sensing points of the rotating speed sensor 1.
The indirect monitoring device 5 for the loosening of the conveying belt, provided by the utility model, has the advantages of simple and ingenious structure, indirect equivalent monitoring, automatic online loosening measurement, adjustable belt tightness, reliable performance and convenience in installation; the technical problems that due to the lack of an automatic monitoring device for the loosening of the conveying belt, the loosening of the conveying belt is difficult to judge by eyes, the monitoring result of the eyes is lagged, the labor intensity is high, the filter cake is seriously loosened by the conveying belt 9 and is full of the conveying belt 9, the waste of the filter cake of products is caused, the sanitation of the field environment is influenced, and the direct online measurement of the loosening of the conveying belt 9 is very difficult are solved, and an indirect loosening measurement mode is difficult and possible; the product can increase the efficiency.
Example 2
A belt loosening and tensioning mechanism 15 (a belt loosening and tensioning mechanism for short) of a conveyor is provided, and the indirect monitoring device 5 (a conveyor belt loosening and measuring device for short) for the loosening of a conveyor belt provided by the utility model is used; the belt loosening and tensioning mechanism 15 mainly comprises a conveying belt loosening and measuring device 5 and a belt tensioning device 7, wherein the belt tensioning device 7 comprises a bearing slideway frame 16, a jacking screw rod 17, a jacking nut 18 and a movable bearing 19; a bearing slide frame 16, which is an upper and lower double slide frame for installing a movable bearing 19; the tightness of the conveyer belt 9 can be automatically and indirectly monitored in an on-line equivalent manner, and the conveyer belt 9 can be manually tensioned.
Assembly of belt slack measuring and tensioning mechanism 15: for convenience of explanation, a phi 400 driven roller 6 and a conveying belt 9 closely related to the belt loosening and tensioning mechanism 15 are additionally arranged; (1) assembling the belt tightening device 7: the movable bearing 19 is arranged in the bearing slideway frame 16, the driven roller 6 is arranged in the double movable bearings 19, the conveyer belt 9 is sleeved on the driving roller 8 and the driven roller 6, the jacking nut 18 is welded in the middle of the right outer side of the bearing slideway frame 16, the jacking screw 17 is screwed on the jacking nut 18 and jacks the movable bearing 19, and the movable bearings 19 and the driven roller 6 can be translated by rotating the jacking screw 17; (2) assembling the conveying belt loosening measuring device 5: the sensor support 2 is adjustably mounted on the left frame of the bearing slideway frame 16, the rotating speed sensor 1 is mounted in a sensor hole 3 of the sensor support 2 and is externally connected with a PLC (programmable logic controller) system 13, and the mounting position of the sensor support 2 is adjusted to enable the rotating speed sensor 1 to correspond to the roller end plate hole 14; the occurrence frequency of the roller end plate hole 14 in unit time can be automatically detected on line (equivalently detecting the rotating speed of the driven roller 6 and the tightness of the conveying belt 9).
Working process of the belt loosening and tensioning mechanism 15: (1) when the conveyer belt 9 is tensioned, the conveyer belt 9 and the driven roller 6 do not slide relatively, the conveyer belt 9 drives the driven roller 6 to rotate (the designed rotating speed is 2s for one circle), the rotating speed sensor 1 senses a four-time rotating speed sensing point 14 in 2s, namely the conveyer belt 9 is tensioned equivalently, and the sensor does not act; (2) when the conveyer belt 9 is loosened, the conveyer belt 9 and the driven roller skid, the rotating speed of the driven roller 6 is reduced (the rotating speed is out of tolerance for more than 2.2s and rotates for one circle), the rotating speed sensor 1 senses a four-time rotating speed sensing point 14 only after more than 2.2s, namely the conveyer belt 9 is equivalently loosened, the sensor transmits out-of-tolerance signals to the PLC program control system 13, and the PLC program control system 13 continuously receives the three-time out-of-tolerance signals and immediately controls the plate pulling cake discharging mechanism 12 and the belt type filter cake conveyer 10 of the automatic filter press 11 to stop working, thereby warning the worker to re-tension the conveyer belt 9; (3) tensioning the conveyor belt 9: the jacking screw rod 17 is rotated by a tool, so that the movable bearing 19 and the driven roller 6 can move leftwards, the conveying belt 9 is tensioned, and filter cakes are effectively prevented from being accumulated and fully discharged out of the conveying belt 9 when the conveying belt 9 runs unevenly and slowly.
The conveyor belt loosening and tensioning mechanism 15 has the advantages that the conveyor belt loosening and measuring device 5 is additionally arranged, namely the rotating speed change of the driven roller 6 is automatically monitored on line to indirectly deduce the tightness degree of the conveyor belt 9, and when the rotating speed of the driven roller 6 is out of tolerance (namely the equivalent tension degree of the conveyor belt 9 is out of tolerance), the automatic stop is carried out so as to tension the conveyor belt 9; the technical problem that people always desire to solve but always fail to obtain successful online direct automatic measurement of the tightness of the conveyer belt 9 is very difficult is solved; the product has the functions of finding belt loosening and solving the belt loosening problem, and can increase the product expansion.
Claims (2)
1. An indirect monitoring device for the looseness of a conveying belt comprises a rotating speed sensor, a sensor bracket and a rotating speed sensing point, namely a roller end plate hole; the method is characterized in that: the rotating speed sensor is an NBN25-30GM65-E2 type proximity sensor; the sensor support is a stainless steel plate type adjustable support bent twice, the upper end of the sensor support is provided with a sensor hole corresponding to the rotating speed sensor, the lower end of the sensor support is provided with a double-support adjusting long hole, and the length of the sensor support corresponds to the distance between the left side of the bearing slide way frame and the roller end plate hole; the rotating speed induction points are four uniformly distributed roller end plate holes of the driven roller; the interconnection relationship is: the sensor support is adjustably arranged on the left frame of the bearing slideway frame, the rotating speed sensor is arranged in a sensor hole of the sensor support and is externally connected with a PLC program control system, and the mounting position of the sensor support is adjusted to ensure that the rotating speed sensor corresponds to the end plate hole of the roller; the equivalent tightness of the conveyer belt can be indirectly inferred by automatically monitoring the rotation speed change of the driven roller on line.
2. A belt loosening and tensioning mechanism of a conveyor comprises a conveying belt loosening and measuring device and a belt tensioning device, wherein the belt tensioning device comprises a bearing slideway frame, a jacking screw rod, a jacking nut and a movable bearing; the device is characterized in that the conveyer belt looseness measuring device is the conveyer belt looseness indirect monitoring device of claim 1; the tightness of the conveyer belt can be automatically and indirectly monitored in an on-line equivalent manner, and the conveyer belt can be manually tensioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122167912.6U CN216444442U (en) | 2021-09-09 | 2021-09-09 | Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122167912.6U CN216444442U (en) | 2021-09-09 | 2021-09-09 | Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216444442U true CN216444442U (en) | 2022-05-06 |
Family
ID=81347553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122167912.6U Active CN216444442U (en) | 2021-09-09 | 2021-09-09 | Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216444442U (en) |
-
2021
- 2021-09-09 CN CN202122167912.6U patent/CN216444442U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113620023A (en) | Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism | |
| CN216444442U (en) | Conveyor belt looseness indirect monitoring device and conveyor belt looseness measuring and tensioning mechanism | |
| CN206122208U (en) | Clean mechanism of liquid crystal display | |
| CN108159766B (en) | Steel belt type vacuum press filter | |
| CN111495015A (en) | Filter cloth rotary filter press | |
| CN209254839U (en) | A kind of double-roll crusher | |
| CN102673978B (en) | Transmission equipment for conveying belt and tearing detection device for conveying belt | |
| CN217587161U (en) | Selenium-enriched rice heavy metal content detection device | |
| CN107226378A (en) | The identical tension cloth-rolling device of knitting circular knitting machine | |
| CN212731302U (en) | Steel wire rope traction type grating trash remover | |
| CN202810723U (en) | Drilling liquid solid-phase separation equipment | |
| CN215660417U (en) | Die cutting device for bottomless material belt | |
| CN110772869B (en) | Circulating filter belt detecting and adjusting device | |
| CN205109162U (en) | A automatically regulated discharge apparatus for link joint belt vacuum filter | |
| CN201316568Y (en) | Belt filter press | |
| CN114229609A (en) | Tension balancing device for dry area | |
| CN209768967U (en) | Tobacco stem sticking device | |
| CN207109177U (en) | Carding machine transmission belt tensioning control system | |
| CN208998558U (en) | A kind of anti-sticking furnace apparatus | |
| CN218963051U (en) | Glue spreading module of glue dispenser | |
| CN212075839U (en) | One-key two-stage automatic bag replacing mechanism | |
| CN208810175U (en) | Flour mill is used in a kind of dimension D piece production of calcium | |
| CN219907506U (en) | Peanut oil squeezes equipment | |
| CN219290924U (en) | Dust collecting equipment with self-cleaning function | |
| CN109229608A (en) | A kind of packed food packing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |