CN202590480U - Filtering pipe and fluid pipeline using same - Google Patents
Filtering pipe and fluid pipeline using same Download PDFInfo
- Publication number
- CN202590480U CN202590480U CN 201220189339 CN201220189339U CN202590480U CN 202590480 U CN202590480 U CN 202590480U CN 201220189339 CN201220189339 CN 201220189339 CN 201220189339 U CN201220189339 U CN 201220189339U CN 202590480 U CN202590480 U CN 202590480U
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- China
- Prior art keywords
- thrust
- screen pipe
- roof pressure
- tube section
- nozzle belt
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- Expired - Fee Related
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Abstract
The utility model discloses a filtering pipe and a fluid pipeline using the same. The fluid pipeline comprises a front connecting pipe section and a rear connecting pipe section, wherein the filtering pipe is inserted into the rear connecting pipe section; the filtering pipe is clamped and fixed by a thrust clamping structure between the front connecting pipe section and the rear connecting pipe section; the filtering pipe comprises a pipe body in the rear connecting pipe section; filtering through holes are distributed in the pipe body; a sealing end cover is arranged at the rear end of the pipe body; the filtering through holes are distributed in the sealing end cover; the front end of the pipe body is an open end; the opening end of the pipe body is provided with a turnup edge which extends outwards from the peripheral surface of the pipe body and is clamped and fixed by the thrust clamping structure between the front connecting pipe section and the rear connecting pipe section; and the turnup edge is provided with a front side surface in jacking thrust fit with a front thrust clamping surface and a rear side surface in jacking thrust fit with a rear thrust clamping surface. The filtering pipe is arranged in the rear connecting pipe section of the fluid pipeline, so the total mounting size of the fluid pipeline is not changed obviously and the fluid pipeline is applicable in the occasions with limited mounting spaces.
Description
Technical field
The utility model belongs to the filter technical field, is specifically related to a kind of screen pipe and uses the fluid circuit of this screen pipe.
Background technology
Dirts such as greasy filth, corrosion can occur after the long-time use of existing hydraulic plumbing system and attach the situation on tube wall; In the equipment moving process; Dirt in the fluid pressure line can break away from tube wall and sneak in the fluid, gets into fluid in the controlling organization of hydraulic plumbing system, and then influences the work of fluid pressure line controlling organization; So just need the fluid in the pipeline be filtered; The filter convection cell that many at present employings are serially connected on the fluid circuit carries out filtration treatment, but the installation of the filter of this peripheral hardware can influence the installation dimension of fluid circuit, is not suitable for being applied in the limited place of installing space.
The utility model content
The purpose of the utility model is to provide a kind of screen pipe, is not suitable for the technical problem in the limited place of fluid circuit installing space with filter in the solution prior art; Simultaneously, the utility model also provides a kind of fluid circuit that uses above-mentioned screen pipe.
For realizing above-mentioned purpose; The screen pipe that the utility model provided adopts following technical scheme: a kind of screen pipe, comprise the body that extends along fore-and-aft direction, and be distributed with the filtration through hole on this body; The rear end of body is provided with seals end cap; Sealing end covers and is distributed with the filtration through hole, and the body front end is an openend, and the openend of body has outside the body outer peripheral face is outward extending and turns edge.
Described outer turning edge is the pyramidal structure of axially extending forward or backward along body.
The fluid circuit that the utility model provided adopts following technical scheme: a kind of fluid circuit; Comprise the preceding nozzle belt and the rear tube section that are assembled together along the butt joint of fore-and-aft direction layout; Forward and backward nozzle belt is through being positioned at the fixing assembling of middle pushing tow syndeton between the two; In the rear tube section, be fitted with screen pipe; This screen pipe is gripped by the thrust clamp structure between the forward and backward nozzle belt, the thrust clamp structure comprise be positioned at before on the nozzle belt preceding thrust clamping face be positioned at the back thrust clamping face on the rear tube section, said screen pipe comprises the body that is arranged in the rear tube section that extends along fore-and-aft direction; Be distributed with the filtration through hole on the body; The rear end of body is provided with seals end cap, and sealing end covers and is distributed with the filtration through hole, and the body front end is an openend; The openend of body has outer the turning edge that grips from the thrust clamp structure by between the said forward and backward nozzle belt of body periphery facing epitaxy, turns edge outward to have leading flank that cooperates with said preceding thrust clamping face roof pressure thrust and the trailing flank that cooperates with the thrust of said back thrust clamping face roof pressure.
The pushing tow syndeton comprises the axial collar nut that extends along fore-and-aft direction in the middle of described; The endoporus of collar nut is a shoulder hole; The big footpath section of shoulder hole is provided with internal thread segment; Before one of them outer peripheral face of nozzle belt and rear tube section be provided with the external screw thread of the internal thread segment screw fit of collar nut, another outer peripheral face on convex with the roof pressure flange that cooperates with the cascaded surface pushing tow of the shoulder hole of said collar nut; The end position place of the front end of rear end or the rear tube section of nozzle belt before this roof pressure flange is arranged on, the side that towards said outside, turns edge of roof pressure flange are and describedly are positioned at the preceding thrust clamping face on the preceding nozzle belt or are positioned at the back thrust clamping face on the rear tube section.
Be set with the pushing tow guide pin bushing on described preceding nozzle belt that convexes with the roof pressure flange or the rear tube section; Have the pushing tow flange between the cascaded surface that is assemblied in said roof pressure flange and the said collar nut on this pushing tow guide pin bushing, described roof pressure flange cooperates with cascaded surface pushing tow in the said collar nut through the pushing tow flange.
Nozzle belt and/or rear tube section are made up of pipeline body and the fittings body towards an end of said screen pipe that is connected in pipeline body before described; Offer the axial fluid through-hole that is communicated with the inner chamber of pipeline body that extends along fore-and-aft direction on the fittings body; Fittings body press the roof pressure end on outer the turning edge act on screen pipe towards ejection till the end of screen pipe, the roof pressure end face of the roof pressure end of fittings body is preceding thrust clamping face or the described back thrust clamping face that is positioned on the rear tube section on the nozzle belt before described being positioned at.
Described fittings body and the inserting of pipeline body spiral convex with and the spacing defining flange that cooperates of pipeline body thrust at the outer peripheral face of fittings body.
Described outer turning edge is the pyramidal structure of axially extending forward or backward along body; The preceding thrust clamping face of nozzle belt is and the said outer taper surface that turns edge and match before said, and the back thrust clamping face of said rear tube section is and the said outer taper surface that turns edge and match.
The beneficial effect of the utility model is: the screen pipe that the utility model provided is on being applied to fluid circuit the time; Screen pipe is gone in the rear tube section along the plug-in mounting that flows to of fluid; The openend of body is positioned at the upper reaches; Fluid in the forward and backward like this nozzle belt is filtered it by screen pipe when flowing through screen pipe, and the impurity in the eliminate fluid avoids in the fluid impurity to the influence of pipeline controlling organization.During concrete the installation, screen pipe is clamped in the fluid circuit by the thrust clamp structure between the forward and backward nozzle belt.The screen pipe that the utility model provided is arranged in the rear tube section when using, and its shared installing space is less, is particularly suitable for being applied to the place that the fluid circuit installing space is limited and need the fluid in the convection cell pipeline to filter.
The fluid circuit that the utility model provided comprises preceding nozzle belt, rear tube section and screen pipe, and forward and backward nozzle belt is fixedly connected through middle pushing tow syndeton, and screen pipe is clamped in the fluid circuit by the thrust clamp structure between the forward and backward nozzle belt.The fore-and-aft direction of the fluid circuit that the utility model provided is as the criterion with fluid flow direction in the fluid circuit; Screen pipe is plugged in the rear tube section; The openend of body is positioned at the upper reaches; Fluid is filtered it by screen pipe when flowing through screen pipe like this, and the impurity in the eliminate fluid avoids in the fluid impurity to the influence of pipeline controlling organization.The screen pipe of the utility model is arranged in the rear tube section of fluid circuit as filter, and the overall installation change in size of fluid circuit that has filter like this is little, is fit to be applied to the place that installing space is limited and the needs convection cell filters.The applied range of the fluid circuit that the utility model provided, simple in structure, easy for installation, the screen pipe in the rear tube section can be removed to clean repeatedly and utilize.
Description of drawings
Fig. 1 is the structural representation of the embodiment 1 of the screen pipe that provides of the utility model;
Fig. 2 is the structural representation of another angle of screen pipe shown in Fig. 1;
Fig. 3 is the structural representation of the embodiment 2 of the screen pipe that provides of the utility model;
Fig. 4 is the structural representation of another angle of screen pipe shown in Fig. 3;
Fig. 5 is to use the structural representation of a kind of fluid circuit of screen pipe as shown in Figure 1;
Fig. 6 is the A place enlarged drawing among Fig. 5;
Fig. 7 is the B place enlarged drawing among Fig. 5;
Fig. 8 uses the structural representation of a kind of fluid circuit of screen pipe as shown in Figure 3;
Fig. 9 is the C place enlarged drawing among Fig. 8;
Figure 10 is the D place enlarged drawing among Fig. 8;
(arrow is depicted as fluid flow direction in the fluid circuit among Fig. 5 and Fig. 8).
The specific embodiment
Embodiment 1:
Like Fig. 1, shown in Figure 2; A kind of embodiment of screen pipe; Screen pipe among this embodiment comprises the body 1 that extends along fore-and-aft direction, on body, is distributed with the filtration through hole, and the front end of body 1 is that openend, rear end are sealing end; The sealing end of body 1 is provided with and seals end cap 3; Be distributed with the filtration through hole on the end cap 3 sealing, the openend of body front end has outside the body outer peripheral face is outward extending and turns edge 2, and 2 the side that deviates from body of turning edge outward is that leading flank 21, its side towards body are trailing flank 22.
Screen pipe in the present embodiment outer turns edge and 2 is the pyramidal structure of axially extending forward along body, and the outer tapering that turns edge of this pyramidal structure is 74 °, and leading flank and trailing flank on described outer the turning edge are the taper anchor ring.
In the present embodiment, the tapering that turns edge outward is 74 °, and in other embodiments, the tapering that turns edge outward can be selected other angles according to practical application.
Embodiment 2:
Like Fig. 3, shown in Figure 4, the difference of itself and embodiment 1 mainly is: said screen pipe outer turns edge and 4 is the pyramidal structure that axially extends back along body.
The outer all tapered structure that turns edge among above-mentioned two embodiment, in other embodiments, turning edge outward also can be horizontal structure.And outer the turning edge of horizontal structure compared with outer the turning edge of pyramidal structure, and it is better with the roof pressure sealing effectiveness of forward and backward nozzle belt that pyramidal structure outer turns edge, and realizes rigid seal.
Screen pipe among above-mentioned two embodiment is when concrete production, and body can adopt the stainless steel etched plate of 0.3mm thickness, around etched plate, leaves the aporate area of 0.5-1mm, with opposite joint position, laser weld edge, etching coiled sheet circle back.The material that seals end cap is the stainless steel etched plate of 0.3mm thickness, leaves the aporate area of 2-3mm all around, and punch forming is fixed on the body through laser weld then.Like Fig. 2, shown in Figure 4 have the outer end cap that turns edge and adopt the stainless steel punching press of 0.3mm thickness or directly process with stainless steel bar, end cap comprises axial direction part and outer the turning edge that is positioned at axial direction part one end, and the other end of axial direction part is weldingly fixed on the body end.Because in use, need the screen pipe plug-in mounting be advanced in the rear tube section, for fear of impacting for the normal flow in the fluid circuit, the tube wall of screen pipe should be thinner.
Embodiment 3:
Like Fig. 5, Fig. 6, shown in Figure 7; A kind of embodiment of fluid circuit; Fluid circuit among this embodiment comprises the preceding nozzle belt 10 and rear tube section 15 that is assembled together along the butt joint of fore-and-aft direction layout; Fluid flow direction is consistent in the fore-and-aft direction here and the fluid circuit; Forward and backward nozzle belt is fitted with screen pipe 14 through being positioned at the fixing assembling of middle pushing tow syndeton between the two in the pipeline section 15 of back, said screen pipe 14 adopts the structure of screen pipe as shown in Figure 1; Screen pipe 14 outer turns edge and 140 is the pyramidal structure of axially extending forward along body; Turn edge outward 140 leading flank and trailing flank is the taper anchor ring, and this screen pipe 14 is gripped by the thrust clamp structure between the forward and backward nozzle belt, this thrust clamp structure comprise be positioned at before preceding thrust clamping face that cooperates with the said outer leading flank roof pressure thrust that turns edge and the back thrust clamping face that cooperates with the said trailing flank roof pressure thrust that turns edge outward that is positioned on the rear tube section on the nozzle belt.Middle pushing tow syndeton forces forward and backward nozzle belt to move to corresponding respectively roof pressure in opposite directions on said screen pipe 14 outer turns edge 140 leading flank and trailing flank.
Preceding nozzle belt 10 in the present embodiment comprises pipeline body and the fittings body on the rear end of said screen pipe that is connected in pipeline body 11 compositions; Fittings body 11 and the inserting of pipeline body spiral convex with on the outer peripheral face of fittings body 11 and the spacing defining flange that cooperates of pipeline body thrust.On fittings body 11, offer the fluid through-hole of axial and intracavity inter-connection pipeline body that extend along fore-and-aft direction; Fittings body 11 press the roof pressure end on outer the turning edge act on screen pipe towards ejection till the rear end of screen pipe 14, the roof pressure end face of fittings body 11 is the preceding thrust clamping face 110 that is sealed and matched with the said outer leading flank thrust roof pressure that turns edge on the nozzle belt before described.
Middle pushing tow syndeton in the present embodiment comprises the axial collar nut 12 that extends along fore-and-aft direction; The endoporus of this collar nut 12 is a shoulder hole; The big footpath section of shoulder hole is provided with internal thread segment; The outer peripheral face of the fittings body 11 of preceding nozzle belt 10 is provided with the internal thread segment screw fit with collar nut; On the outer peripheral face of rear tube section 15, convex with the roof pressure flange 150 that cooperates with the cascaded surface pushing tow of the shoulder hole of said collar nut; Here the roof pressure flange 150 on the rear tube section 15 be arranged on the rear tube section towards the turn edge end position place of 140 front end of said screen pipe 14 outer, the outer side that turns edge towards said screen pipe 14 of this roof pressure flange 150 be on the described rear tube section 15 with said outside the back thrust clamping face that is sealed and matched of the trailing flank roof pressure that turns edge.
In the present embodiment, the roof pressure flange on rear tube section 15 cooperates through the cascaded surface pushing tow of the shoulder hole in pushing tow guide pin bushing 13 and the said collar nut.Said pushing tow guide pin bushing 13 is sleeved on the rear tube section 15; Has the pushing tow flange 130 between the cascaded surface of shoulder hole of the roof pressure flange that is assemblied in said rear tube section and said collar nut on the pushing tow guide pin bushing 13; The both sides, front and back of pushing tow flange 130 have respectively the forward and backward pushing tow face that cooperates with the shoulder hole pushing tow of roof pressure flange 150 and said collar nut 12, and cascaded surface 120 pushing tows that described roof pressure flange 150 passes through in the shoulder hole of pushing tow flange 130 and collar nut cooperate.During use; The collar nut of screwing; Collar nut applies the active force that forces both to move in opposite directions to fittings body and pushing tow guide pin bushing, so on the one hand can be with the fixing assembling of screen pipe, preceding nozzle belt and rear tube section, on the other hand; The back thrust clamping face of sealing of the roof pressure of the leading flank that has also guaranteed the preceding thrust clamping face of preceding nozzle belt and turned edge outward and rear tube section seals with the roof pressure of the trailing flank that turns edge outward, thereby guarantees effective sealing of forward and backward nozzle belt joint.
In addition; The outer 140 tapered structures that turn edge of the screen pipe in the present embodiment; Leading flank that turns edge outward and trailing flank are the taper anchor ring; The roof pressure end face that the preceding thrust clamping face of nozzle belt is a fittings body like this is the taper surface that matches with the said outer leading flank that turns edge, and the outer side that turns edge towards said screen pipe of the roof pressure flange that the back thrust clamping face of rear tube section is the rear tube section is a taper surface.
As shown in Figure 5, during use, fluid in the fluid circuit flows in the past backward, and fluid is filtered it by screen pipe through screen pipe the time, and the impurity in the eliminate fluid avoids in the fluid impurity to the influence of pipeline controlling organization.
Embodiment 4:
Like Fig. 8, Fig. 9, shown in Figure 10; The difference of itself and embodiment 3 mainly is: screen pipe 24 is plugged in the rear tube section of being made up of pipeline body and fittings body 21 20; The structure of this screen pipe 24 is consistent with the structure shown in Fig. 3; Screen pipe 24 outer turns edge and 240 is the pyramidal structure that extends back vertically, and at this moment, the front end of fittings body 21 is the roof pressure end; The taper surface of end face 210 for being used for cooperating with the trailing flank roof pressure that turns edge outward of the roof pressure end of this fittings body, the outer peripheral face of fittings body 21 is provided with the external screw thread of spinning collar nut.Nozzle belt 25 before the described pushing tow guide pin bushing 23 that is used for cooperating with the cascaded surface roof pressure of the shoulder hole of collar nut 22 is sleeved on; Be provided with roof pressure flange 250 in the rear end of preceding nozzle belt 25; When screwing collar nut 22; On forward and backward nozzle belt moves in opposite directions that end face 210 sealing top until the roof pressure end of fittings body 21 are pressed in screen pipe 24 outer 240 the trailing flank of turning edge and the trailing flank roof pressure of the roof pressure flange 250 of preceding nozzle belt 25 on screen pipe outer turns edge 240 leading flank; Both realize fixing to screen pipe, realized the sealing at fluid pipe pipeline connector place simultaneously.
Equally, the outer all tapered structure that turns edge among above-mentioned two embodiment, in other embodiments, turning edge outward also can be horizontal structure.And outer the turning edge of horizontal structure compared with outer the turning edge of pyramidal structure, and it is better with the roof pressure sealing effectiveness of forward and backward nozzle belt that pyramidal structure outer turns edge, and reaches effective rigid seal.
In embodiment 3, preceding nozzle belt is made up of pipeline body and fittings body, and in embodiment 4, then constitutes the rear tube section by pipeline body and fittings body, and the part body of screen pipe is plugged in the fluid passage of fittings body.In other embodiments; Forward and backward nozzle belt can be made up of pipeline body and fittings body simultaneously; Being inserted in the pipeline body of the equal helixseal of fittings body; The end face of the corresponding end of two fittings bodies cooperates with the outer leading flank that turns edge and the trailing flank roof pressure of screen pipe respectively, thereby realizes being fixed and the roof pressure sealing of convection cell pipeline interface screen pipe.
Claims (8)
1. screen pipe; It is characterized in that: comprise the body that extends along fore-and-aft direction; Be distributed with the filtration through hole on this body, the rear end of body is provided with seals end cap, and sealing end covers and is distributed with the filtration through hole; The body front end is an openend, and the openend of body has outside the body outer peripheral face is outward extending and turns edge.
2. screen pipe according to claim 1 is characterized in that: described outer turning edge is the pyramidal structure of axially extending forward or backward along body.
3. fluid circuit; It is characterized in that: comprise the preceding nozzle belt and the rear tube section that are assembled together along the butt joint of fore-and-aft direction layout; Forward and backward nozzle belt is through being positioned at the fixing assembling of middle pushing tow syndeton between the two; In the rear tube section, be fitted with screen pipe; This screen pipe is gripped by the thrust clamp structure between the forward and backward nozzle belt, the thrust clamp structure comprise be positioned at before on the nozzle belt preceding thrust clamping face be positioned at the back thrust clamping face on the rear tube section, said screen pipe comprises the body that is arranged in the rear tube section that extends along fore-and-aft direction; Be distributed with the filtration through hole on the body; The rear end of body is provided with seals end cap, and sealing end covers and is distributed with the filtration through hole, and the body front end is an openend; The openend of body has outer the turning edge that grips from the thrust clamp structure by between the said forward and backward nozzle belt of body periphery facing epitaxy, turns edge outward to have leading flank that cooperates with said preceding thrust clamping face roof pressure thrust and the trailing flank that cooperates with the thrust of said back thrust clamping face roof pressure.
4. fluid circuit according to claim 3; It is characterized in that: the pushing tow syndeton comprises the axial collar nut that extends along fore-and-aft direction in the middle of described; The endoporus of collar nut is a shoulder hole; The big footpath section of shoulder hole is provided with internal thread segment; Before one of them outer peripheral face of nozzle belt and rear tube section be provided with the external screw thread of the internal thread segment screw fit of collar nut, another outer peripheral face on convex with the roof pressure flange that cooperates with the cascaded surface pushing tow of the shoulder hole of said collar nut; The end position place of the front end of rear end or the rear tube section of nozzle belt before this roof pressure flange is arranged on, the side that towards said outside, turns edge of roof pressure flange are and describedly are positioned at the preceding thrust clamping face on the preceding nozzle belt or are positioned at the back thrust clamping face on the rear tube section.
5. fluid circuit according to claim 4; It is characterized in that: be set with the pushing tow guide pin bushing on described preceding nozzle belt that convexes with the roof pressure flange or the rear tube section; Have the pushing tow flange between the cascaded surface that is assemblied in said roof pressure flange and the said collar nut on this pushing tow guide pin bushing, described roof pressure flange cooperates with cascaded surface pushing tow in the said collar nut through the pushing tow flange.
6. fluid circuit according to claim 3; It is characterized in that: nozzle belt and/or rear tube section are made up of pipeline body and the fittings body towards an end of said screen pipe that is connected in pipeline body before described; Offer the axial fluid through-hole that is communicated with the inner chamber of pipeline body that extends along fore-and-aft direction on the fittings body; Fittings body press the roof pressure end on outer the turning edge act on screen pipe towards ejection till the end of screen pipe, the roof pressure end face of the roof pressure end of fittings body is preceding thrust clamping face or the described back thrust clamping face that is positioned on the rear tube section on the nozzle belt before described being positioned at.
7. fluid circuit according to claim 6 is characterized in that: described fittings body and the inserting of pipeline body spiral convex with and the spacing defining flange that cooperates of pipeline body thrust at the outer peripheral face of fittings body.
8. according to any described fluid circuit in the claim 3 to 7; It is characterized in that: described outer turning edge is the pyramidal structure of axially extending forward or backward along body; The preceding thrust clamping face of nozzle belt is and the said outer taper surface that turns edge and match before said, and the back thrust clamping face of said rear tube section is and the said outer taper surface that turns edge and match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220189339 CN202590480U (en) | 2012-04-28 | 2012-04-28 | Filtering pipe and fluid pipeline using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220189339 CN202590480U (en) | 2012-04-28 | 2012-04-28 | Filtering pipe and fluid pipeline using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202590480U true CN202590480U (en) | 2012-12-12 |
Family
ID=47308061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220189339 Expired - Fee Related CN202590480U (en) | 2012-04-28 | 2012-04-28 | Filtering pipe and fluid pipeline using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202590480U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641616A (en) * | 2012-04-28 | 2012-08-22 | 新乡平原航空液压设备有限公司 | Filtering pipe and fluid pipeline using same |
| CN103170940A (en) * | 2013-04-01 | 2013-06-26 | 国家电网公司 | Bevel gear intermediate shaft insulation spanner |
-
2012
- 2012-04-28 CN CN 201220189339 patent/CN202590480U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102641616A (en) * | 2012-04-28 | 2012-08-22 | 新乡平原航空液压设备有限公司 | Filtering pipe and fluid pipeline using same |
| CN102641616B (en) * | 2012-04-28 | 2015-01-14 | 新乡平原航空液压设备有限公司 | Filtering pipe and fluid pipeline using same |
| CN103170940A (en) * | 2013-04-01 | 2013-06-26 | 国家电网公司 | Bevel gear intermediate shaft insulation spanner |
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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: 20121212 Termination date: 20150428 |
|
| EXPY | Termination of patent right or utility model |