CN201818322U - Gas-compressing, deslagging, drilling and dust remover for coal mine downhole - Google Patents
Gas-compressing, deslagging, drilling and dust remover for coal mine downhole Download PDFInfo
- Publication number
- CN201818322U CN201818322U CN2010205686005U CN201020568600U CN201818322U CN 201818322 U CN201818322 U CN 201818322U CN 2010205686005 U CN2010205686005 U CN 2010205686005U CN 201020568600 U CN201020568600 U CN 201020568600U CN 201818322 U CN201818322 U CN 201818322U
- Authority
- CN
- China
- Prior art keywords
- high pressure
- dust
- gases
- deslagging
- venturi tube
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Nozzles (AREA)
Abstract
The utility model discloses a gas-compressing, deslagging, drilling and dust remover for coal mine downholes relating to ventilation and dust removing devices for coal mine downholes, which comprises a Venturi tube mixer. The Venturi tube mixer comprises an inlet plenum, a contraction pipe, a straight pipe and a conical diffusion section. The inlet plenum is equipped with a high pressure gas inlet tube and the outer end of the high pressure gas inlet tube is arranged at the outside of the inlet plenum. The inner end of the high pressure gas inlet tube is connected with at least one straight pipe parallel to the central axis of the Venturi tube mixer and the other end of the straight pipe is equipped with a high pressure gas nozzle. The exit of the high pressure gas nozzle is arranged in the Venturi tube mixer. The Venturi tube mixer is also equipped with a water intake pipe equipped with a valve. The inner end of the water intake pipe is connected with a water atomization nozzle and the water atomization nozzle is arranged in the Venturi tube mixer.Based on high-pressure gas injection principle, wet dust-removing technology is adopted by the dust remover, which has the advantages of simple structure, small volume, light weight, convenient transportation and high dust-removing efficiency.
Description
Technical field
The utility model relates to the device of dust removal by ventilation under the coal mine, is mainly used under the coal mine tunnel wall coal seam dry method boring dedusting, anchor pressure spray process depositing dust, coal conveying belt transfer point, refers in particular to a kind of underground mine use deslagging boring deduster of calming the anger.
Background technology
Because gas threatens the safety of coal mining, the gas under the coal mine in the tunnel wall boring pump drainage coal seam becomes one important step before the coal mining.To some weak seams, can only dry method hole, adopt compressed air drifting dust technology, the coal dust and the compressed air that produce when making boring spray along the gap between drilling rod and the hole wall together.Though the drifting dust gas flow is little, the energy that compressed air has is big, and the gas shock power of formation is strong, and the band dust quantity is up to 3000mg/m
3More than, cause the environment of work plane very abominable, the serious threat operating personnel's is healthy; The gas density height of ejection air-flow, because of the height safety in production needs, the dust-removing method of drifting dust technology is forbidden exhaust fan.
In order to improve the serious problem of environmental pollution in the dry method boring, present way is the aperture dust arrester that the drilling rod sleeve pipe is set in the aperture of dry method boring, small casing gos deep into the coal seam, big sleeve pipe is pressed close to the tunnel wall, compressed-air actuated drifting dust enters big sleeve pipe along the ejection of the gap between drilling rod and the small casing, and at big sleeve pipe internal spraying depositing dust, efficiency of dust collection is between 50%～60%, though dust-laying effect is obvious, be difficult to reach working envrionment sanitary standard.At present, the aperture dedusting also has the process equipment of other form, as multi-stage non-powered orifice dust remover (200920032546.X), mining wet type orifice dust catcher (200620110816.0), but because equipment volume is big, remove fast, dress and difficult, be difficult to adapt to the frequent demand of changing of bore position.
Fast development along with national economy, the demand of coal is increasing, the safe coal exploitation is more and more paid attention to, and tunnel wall boring pump drainage gas has become one of important measures that gas is given prominence in the prevention coal mining, so the boring workload in wall coal seam is increasing.In order to eliminate in the dry method boring procedure dust to the threat of operating worker, the development volume is little, in light weight, safe and reliable, remove and adorn easily that the high-effective dust-removing device has important practical value, it can improve the working environment of work plane, reduce the labour intensity of operating worker, ensure the working interest of operating worker, simultaneously, can improve the operating efficiency of wall boring.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of underground mine use deslagging boring deduster of calming the anger is provided, deduster has adopted gases at high pressure injection principle, wet dedusting technology, and it is simple in structure, volume is little, in light weight, convenient in carrying and efficiency of dust collection height.
The purpose of this utility model is achieved in that the underground mine use deslagging boring deduster of calming the anger, comprise Venturi tube mixer, described Venturi tube mixer comprises inlet plenum, shrink pipeline section, straight length and taper diffuser, in described inlet plenum, be provided with the gases at high pressure inlet tube, the outer end of gases at high pressure inlet tube is arranged on outside the inlet plenum, the inner of gases at high pressure inlet tube connects at least one straight tube parallel with the Venturi tube mixer central axis, the other end of straight tube is equipped with the gases at high pressure shower nozzle, and the exit of gases at high pressure shower nozzle is arranged in the Venturi tube mixer; Water inlet pipe also is set on described Venturi tube mixer, valve is installed on the water inlet pipe, the inner of water inlet pipe connects the water atomization shower nozzle, and described water atomization shower nozzle is arranged in the Venturi tube mixer.
The utility model is provided with inlet plenum before the contraction pipeline section of Venturi tube mixer, the gases at high pressure shower nozzle is arranged in the Venturi tube mixer, the high velocity air that the gases at high pressure shower nozzle sprays passes through Venturi tube mixer, inlet plenum at Venturi tube mixer forms negative pressure, the dust-contained airflow that suction is entered by air inlet pipe; The water spray shower nozzle is installed in Venturi tube mixer, the water atomization amount is controlled by the valve on the water inlet pipe, water is atomized into droplet, droplet is dispersed in the dust-contained airflow, enter the straight length and the taper diffuser of Venturi tube with dust-contained airflow, form wet dedusting, that is: form the high turbulence state in the dust-contained airflow of the high velocity air of injection and suction, the droplet flow process in Venturi tube mixer, created for grit and droplet constantly to contact, the chance of collision, cause grit and captured the dedusting of the formation first order by droplet.
Underground mine use is calmed the anger, and to adopt compressed air be working fluid to deslagging boring deduster, and when the pressure of compressed air source surpassed 0.19MPa, the air velocity that the gases at high pressure shower nozzle sprays was velocity of sound or supersonic speed, and the injection effect of generation is better; In order to improve the operating efficiency of working fluid, be single sprinkler design many shower nozzles, can increase substantially injection than (driving fluid quality/working fluid quality).
Advantage of the present utility model is:
(1) adopt the gases at high pressure injection, the deduster movement-less part, environment for use is not subjected to the restriction of gas density;
(2) deduster is simple in structure, and weight is no more than 50kg, carries, removes, adorns conveniently;
(3) efficiency of dust collection of deduster is not less than 95%, and correct the use the deduster blockage problem can not occur.
The exit of gases at high pressure shower nozzle of the present utility model is arranged on shrinks pipeline section or straight length.
Described water inlet pipe is set on the inlet plenum, and the water atomization shower nozzle is arranged in the inlet plenum.
Described water inlet pipe is set in and shrinks on the pipeline section, and the water atomization shower nozzle is arranged on and shrinks in the pipeline section.
Described water inlet pipe is set on the straight length, and the water atomization shower nozzle is arranged in the straight length.
In order to make dust removing effects better, the outer end of described taper diffuser connects the dedusting dewater unit.The mixed airflow that Venturi tube mixer is discharged forms second level dedusting by the dedusting dewater unit.
Described dedusting dewater unit comprises horizontal cylinder and the fiber screen that is arranged on the horizontal cylinder cross section, the fixedly connected baffle plate in the rear end of described cylindrical shell, air flow stream exported after the lower end of cylindrical shell was provided with dust-containing water flow export and dedusting, described dust-containing water flow export is arranged on the front side of fiber screen, the air flow stream outlet is arranged on the rear side of fiber screen after the dedusting, is provided with between the rear end face of the front end face of fiber screen and described taper diffuser at interval.Wet fibril on the fiber grid and dust produce inertial collision effect and interception effect, and the dustproof dehydrating effect of secondary is good.
Between described gases at high pressure inlet tube and the straight tube gases at high pressure distributor chamber is set, the gases at high pressure distributor chamber is positioned at described inlet plenum, and described each straight tube is arranged in an end of gases at high pressure distributor chamber.
The upper end of described inlet plenum connects dust-contained airflow inlet tube, the axis of dust-contained airflow inlet tube and the axis normal of Venturi tube mixer.
Described inlet plenum connects dust-contained airflow inlet tube, the axis of dust-contained airflow inlet tube and the dead in line of Venturi tube mixer.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is second kind of structural representation of the present utility model.
Fig. 3 is the reference figure of the utility model use occasion.
The specific embodiment
Embodiment 1
As shown in Figure 1, for the underground mine use deslagging boring deduster of calming the anger, comprise Venturi tube mixer 10, Venturi tube mixer 10 comprises inlet plenum 10-1, shrinks pipeline section 10-2, straight length 10-3 and taper diffuser 10-4.In inlet plenum 10-1, be provided with gases at high pressure inlet tube 1, the outer end of gases at high pressure inlet tube 1 is arranged on outside the inlet plenum 10-1, the inner of gases at high pressure inlet tube 1 connects two straight tubes 14 parallel with Venturi tube mixer 10 central axis, the other end of straight tube 14 is equipped with gases at high pressure shower nozzle 13, and the exit of gases at high pressure shower nozzle 13 is arranged on shrinks pipeline section 10-2.
On the contraction pipeline section 10-2 of Venturi tube mixer 10 water inlet pipe 31 is set also, valve 6 is installed on the water inlet pipe 31, the inner of water inlet pipe 31 connects water atomization shower nozzle 9, and water atomization shower nozzle 9 is arranged on and shrinks in the pipeline section 10-2.
The outer end of taper diffuser 10-4 connects horizontal cylinder 28, the fiber screen 11 that on horizontal cylinder 28 cross sections, is provided with, the fixedly connected baffle plate 33 in the rear end of cylindrical shell 28, air flow stream exported 30 after the lower end of cylindrical shell 28 was provided with dust-containing water flow export 29 and dedusting, dust-containing water flow export 29 is arranged on the front side of fiber screen 11, air flow stream outlet 30 is arranged on the rear side of fiber screen 11 after the dedusting, is provided with between the rear end face of the front end face of fiber screen 11 and taper diffuser 10-4 at interval.Fiber screen 11 can be replaced with eddy flow plate, folded sheet or packing layer.
As shown in Figure 2, between gases at high pressure inlet tube 1 and the straight tube 14 gases at high pressure distributor chamber 4 is set, gases at high pressure distributor chamber 4 is arranged in the inlet plenum 10-1, and each straight tube 14 is arranged in an end of gases at high pressure distributor chamber 4.The upper end of inlet plenum 10-1 connects dust-contained airflow inlet tube 8, the axis normal of the axis of dust-contained airflow inlet tube 8 and Venturi tube mixer 10.First filter screen 3 is set in the gases at high pressure inlet tube 1.Water inlet pipe 31 is set on the inlet plenum 10-1, and water atomization shower nozzle 9 is arranged in the inlet plenum 10-1.The lower end of inlet plenum 10-1 connects slag tap 16.All the other structures are with embodiment 1.
Gases at high pressure 2 enter gases at high pressure distributor chamber 4 by gases at high pressure inlet tube 1, pass through straight tube 14 then, and gases at high pressure spray by gases at high pressure shower nozzle 13, produce high velocity air; The high velocity air that sprays produces ejector action, in the inlet plenum formation negative pressure of Venturi tube mixer 10, aspirates the dust-contained airflow 7 that guides and come; Simultaneously, in Venturi tube mixer 10 inlet plenums water atomization shower nozzle 9 is set, water under high pressure 5 arrives water atomization shower nozzle 9 by valve 6 and atomizes, and the atomizing droplet is evenly respectively in dust-contained airflow; Because the ejector action of high velocity air, the droplet of atomizing enters the straight length of Venturi tube mixer 10 with dust-contained airflow 7 and high velocity air, because the diffusion of high velocity air and entrainment effect, the straight length of Venturi tube mixer 10 and the air-flow in the diffuser are in the turbulent condition of height, grit and droplet have been created and have constantly been contacted, collision, grit is caused dirt to be captured by droplet by water-wet and weightening finish, constitutes wet dedusting; Cross fiber screen 11 by the air communication that Venturi tube mixer 10 is discharged, the slit is left in fiber screen 11 lower ends and anemostat outlet lower end, is convenient to the outflow of dust-containing water, prevents to stop up, and dust-containing water flows out from dust-containing water flow export 29; Because discharge gas shock fiber screen, and the gap is less between the fiber grid silk, the fiber grid silk of band moisture film bumps to the grit of not removing in the air-flow and tackles, and forms final dusting, and air-flow carries out partial dehydration.Air-flow 12 after the dedusting is air flow stream outlet 30 discharging downwards after the dedusting.
As shown in Figure 3, compressed air enters bit location by hollow drill 22, carries ickings secretly, and ejects from gap between drilling rod 22 and aperture dust arrester 21 sleeve pipes, and the dust-contained airflow of formation enters in the cavity of aperture dust arrester 21; When compressed-air hose 24 and underground mine use are calmed the anger deslagging boring deduster 18 when being connected, the underground mine use negative pressure that deslagging boring deduster 18 air inlet ports form of calming the anger, by the dust-contained airflow in the negative pressure air duct 23 suction orifice dust arresters 21, oarse-grained ickings is discharged by the slag-drip opening of aperture dust arrester 21, fall into undergroundly, the floating dust of small particle diameter is taken away; When high-pressure water hose 25 and underground mine use are calmed the anger deslagging boring deduster 18 when being communicated with, the underground mine use deslagging boring deduster 18 of calming the anger has dedusting function, and deduster begins dedusting work, be sucked and small size particle in deduster, remove.Because the intake-gas flow greater than the ejection air flow rate of carrying ickings secretly, the dirt phenomenon can not occur emitting in aperture dust arrester 21.Among Fig. 3,19 is the coal seam, and 20 is the tunnel wall, 24 compressed-air hoses, and 25 is high-pressure water hose, and 26 is the tunnel high-pressure air tube, and 27 is the tunnel high-pressure water pipe.
The underground mine use that is applicable to the aperture dedusting deslagging boring deduster basic parameter of calming the anger:
1. compressed air source pressure: 〉=0.2MPa;
2. injection is than (injection gaseous mass/compressed air quality): 10～15;
3. be suitable for spraying pressure of supply water: 〉=0.3MPa;
4. liquid-gas ratio: 0.08～0.10L/m
3
5. applied powder dust concentration scope: 0～30000mg/m
3
6. efficiency of dust collection: 〉=95%;
7. deduster weight:＜50kg.
Claims (10)
1. the underground mine use deslagging boring deduster of calming the anger, comprise Venturi tube mixer, described Venturi tube mixer comprises inlet plenum, shrinks pipeline section, straight length and taper diffuser, it is characterized in that: in described inlet plenum, be provided with the gases at high pressure inlet tube, the outer end of gases at high pressure inlet tube is arranged on outside the inlet plenum, the inner of gases at high pressure inlet tube connects at least one straight tube parallel with the Venturi tube mixer central axis, the other end of straight tube is equipped with the gases at high pressure shower nozzle, and the exit of gases at high pressure shower nozzle is arranged in the Venturi tube mixer; Water inlet pipe also is set on described Venturi tube mixer, valve is installed on the water inlet pipe, the inner of water inlet pipe connects the water atomization shower nozzle, and described water atomization shower nozzle is arranged in the Venturi tube mixer.
2. the underground mine use according to claim 1 deslagging boring deduster of calming the anger is characterized in that: be arranged in the exit of described gases at high pressure shower nozzle and shrink pipeline section or straight length.
3. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: described water inlet pipe is set on the inlet plenum, and the water atomization shower nozzle is arranged in the inlet plenum.
4. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: described water inlet pipe is set in and shrinks on the pipeline section, and the water atomization shower nozzle is arranged on and shrinks in the pipeline section.
5. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: described water inlet pipe is set on the straight length, and the water atomization shower nozzle is arranged in the straight length.
6. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: the outer end of described taper diffuser connects the dedusting dewater unit.
7. the underground mine use according to claim 6 deslagging boring deduster of calming the anger, it is characterized in that: described dedusting dewater unit comprises horizontal cylinder and the fiber screen that is arranged on the horizontal cylinder cross section, the fixedly connected baffle plate in the rear end of described cylindrical shell, air flow stream exported after the lower end of cylindrical shell was provided with dust-containing water flow export and dedusting, was provided with between the rear end face of the front end face of fiber screen and described taper diffuser at interval.
8. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: between described gases at high pressure inlet tube and the straight tube gases at high pressure distributor chamber is set, the gases at high pressure distributor chamber is positioned at described inlet plenum, and described each straight tube is arranged in an end of gases at high pressure distributor chamber.
9. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: the upper end of described inlet plenum connects dust-contained airflow inlet tube, the axis of dust-contained airflow inlet tube and the axis normal of Venturi tube mixer.
10. the underground mine use according to claim 1 deslagging boring deduster of calming the anger, it is characterized in that: described inlet plenum connects dust-contained airflow inlet tube, the axis of dust-contained airflow inlet tube and the dead in line of Venturi tube mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205686005U CN201818322U (en) | 2010-10-20 | 2010-10-20 | Gas-compressing, deslagging, drilling and dust remover for coal mine downhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205686005U CN201818322U (en) | 2010-10-20 | 2010-10-20 | Gas-compressing, deslagging, drilling and dust remover for coal mine downhole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818322U true CN201818322U (en) | 2011-05-04 |
Family
ID=43916283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205686005U Expired - Fee Related CN201818322U (en) | 2010-10-20 | 2010-10-20 | Gas-compressing, deslagging, drilling and dust remover for coal mine downhole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818322U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943021A (en) * | 2010-10-20 | 2011-01-12 | 江都市引江矿业设备有限公司 | Compressing-deslagging-drilling dust remover for coal pits |
| CN102269010A (en) * | 2011-07-14 | 2011-12-07 | 江都市引江矿业设备有限公司 | Coal mine down-hole drilling deslagging dust remover |
| CN102425445A (en) * | 2011-10-10 | 2012-04-25 | 中煤第五建设有限公司第三十一工程处 | Negative pressure guniting dust removing device |
| CN103114869A (en) * | 2013-02-28 | 2013-05-22 | 中国矿业大学 | Device for suppressing gas explosion and application method for device |
| CN103216256A (en) * | 2013-04-18 | 2013-07-24 | 吕景纪 | Mine pneumatic wet type pore dust settling device |
| CN105064918A (en) * | 2015-07-17 | 2015-11-18 | 中国电力科学研究院 | Vertical guide and dust collection device for drilling transmission and transformation line foundations |
| CN112392535A (en) * | 2020-11-05 | 2021-02-23 | 太原理工大学 | Method for treating dust on coal mine tunneling working face by using aerial fog turbulent flow fluid |
| CN112392482A (en) * | 2020-11-05 | 2021-02-23 | 太原理工大学 | Device for treating dust on underground coal face by gas atomization turbulent fluid |
-
2010
- 2010-10-20 CN CN2010205686005U patent/CN201818322U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943021A (en) * | 2010-10-20 | 2011-01-12 | 江都市引江矿业设备有限公司 | Compressing-deslagging-drilling dust remover for coal pits |
| CN102269010A (en) * | 2011-07-14 | 2011-12-07 | 江都市引江矿业设备有限公司 | Coal mine down-hole drilling deslagging dust remover |
| CN102425445A (en) * | 2011-10-10 | 2012-04-25 | 中煤第五建设有限公司第三十一工程处 | Negative pressure guniting dust removing device |
| CN103114869A (en) * | 2013-02-28 | 2013-05-22 | 中国矿业大学 | Device for suppressing gas explosion and application method for device |
| CN103114869B (en) * | 2013-02-28 | 2015-04-29 | 中国矿业大学 | Device for suppressing gas explosion and application method for device |
| CN103216256A (en) * | 2013-04-18 | 2013-07-24 | 吕景纪 | Mine pneumatic wet type pore dust settling device |
| CN105064918A (en) * | 2015-07-17 | 2015-11-18 | 中国电力科学研究院 | Vertical guide and dust collection device for drilling transmission and transformation line foundations |
| CN112392535A (en) * | 2020-11-05 | 2021-02-23 | 太原理工大学 | Method for treating dust on coal mine tunneling working face by using aerial fog turbulent flow fluid |
| CN112392482A (en) * | 2020-11-05 | 2021-02-23 | 太原理工大学 | Device for treating dust on underground coal face by gas atomization turbulent fluid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101943021B (en) | Compressing-deslagging-drilling dust remover for coal pits | |
| CN101956563A (en) | Deduster | |
| CN201818322U (en) | Gas-compressing, deslagging, drilling and dust remover for coal mine downhole | |
| CN101963065A (en) | Compressed air slag discharge drilling deduster for use under coal mines | |
| CN201818321U (en) | Dust remover | |
| CN206730758U (en) | Negative pressure dust removing device | |
| CN111878153B (en) | Coal mine dust removal system and dust removal method | |
| CN111298584B (en) | Double-venturi pneumatic wet dust removal system | |
| CN201818319U (en) | Underground gas-compressing deslagging drilling dust remover for coal mine | |
| CN107313731A (en) | A kind of hell is calmed the anger water jet blowing and drawing type dust arrester | |
| CN205189939U (en) | Mining annular is drawn and is penetrated dust pelletizing system | |
| CN104373064A (en) | Wet dust removing system of coal mine gas drainage borehole | |
| CN208546149U (en) | A kind of gas injection formula coal bed drilling drilling hole dust collector device | |
| CN104453979B (en) | The remodeling method of underground coal mine negative pressure-pumping dust collecting process | |
| CN203412533U (en) | Wet dust removal system for coal-mine gas pumping-exhaust drill hole | |
| CN206444372U (en) | A kind of Rafael nozzle jet duster | |
| CN206027973U (en) | Crisscross liquid film supersonic speed gas atomizer | |
| CN209761380U (en) | Coal mine underground drilling blowout prevention and dust removal device | |
| CN201037426Y (en) | Support coal discharge injection negative pressure atomization dust remover | |
| CN203097768U (en) | Dust removal device of dry-type drilling hole | |
| CN2296401Y (en) | Negative pressure dust trapping device for coal discharge outlet of discharge top coal hydraulic support | |
| CN202157821U (en) | Drilling and slagging deduster for down-hole coal mine | |
| CN202970548U (en) | Gas jet flow dust collector for mine drilling | |
| CN105569721A (en) | Air-spray linkage type annular jetting dust-removal system for mining | |
| CN102269010A (en) | Coal mine down-hole drilling deslagging dust remover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20151020 |
|
| EXPY | Termination of patent right or utility model |