CN205046165U - Annealing box of high heat utilization efficiency - Google Patents
Annealing box of high heat utilization efficiency Download PDFInfo
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- CN205046165U CN205046165U CN201520750101.0U CN201520750101U CN205046165U CN 205046165 U CN205046165 U CN 205046165U CN 201520750101 U CN201520750101 U CN 201520750101U CN 205046165 U CN205046165 U CN 205046165U
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- pond
- annealing box
- heat radiation
- oil
- preheating
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Abstract
The utility model discloses a high heat utilization efficiency annealing box, annealing box right side bottom is provided with and unreels the axle, annealing box left side bottom is provided with the rolling axle, the annealing box front left end upper portion corresponding part department of corresponding annealing box is provided with oily cold charge and puts, annealing box back upper portion is provided with the heat dissipation pond, the lower part is provided with and preheats the pond in the annealing box back, thermal power thrust unit installs in preheating the pond one of them section and extends to in the annealing box other end and extend the back and correspond the structural connection with the pond of dispelling the heat, the heat dissipation pond is connected through failing oil pipe and preheating the pond, it puts with oily cold charge after through defeated oil pipe installation oil pump and is connected to preheat the pond, be provided with the air inlet of fan directly over the heat dissipation pond, the gas outlet of fan sets up in the annealing box, the guiding tube reciprocal distribution openly corresponds the position in the annealing box, the corresponding structure in heat dissipation pond corresponds with reciprocal thrust unit to be connected, reciprocal thrust unit is connected with thermal power thrust unit, when the device improves energy utilization also better realization reduce the mesh of organism temperature.
Description
Technical field
The utility model relates to the plain conductor wire drawing after annealing treatment facility field in cable processing units, espespecially a kind of high heat utilization efficiency annealing box.
Background technology
Annealing box mainly applies to carry out anneal to the wire after processing in wire fabricated product, existing annealing box structure is comparatively simple, heat utilization efficiency is low, because concentrate on after the most heat of heat utilization efficiency all scatters and disappears on cabinet or body, cause cabinet or organism temperature higher, very easily cause the problem such as the scald of staff to occur, if can by the partial heat transfer in these heats, just can reduce the temperature of body or cabinet, can also capacity usage ratio be improved simultaneously.
Summary of the invention
For solving the problem, the utility model provides a kind of high heat utilization efficiency annealing box, this apparatus structure is firm, can be transferred to other structures, also achieve the object of reduction organism temperature while improving capacity usage ratio preferably preferably by remaining heat fast speed after annealing.
For achieving the above object, the utility model adopts following technology to realize, a kind of high heat utilization efficiency annealing box, comprise oil cooling device, heat radiation pond, heat power thrust unit, preheating pond, oil pump, annealing box, guide reel, unreeling shaft, Scroll, tensioning roller, reciprocating device, wherein annealing box contour structures is rectangular parallelepiped, on the right side of annealing box, bottom is provided with unreeling shaft, on the left of annealing box, bottom is provided with Scroll, on the left of unreeling shaft, oblique upper is provided with tensioning roller, on the right side of Scroll, oblique upper is provided with tensioning roller, left upper part corresponding annealing box corresponding component place in annealing box front is provided with oil cooling device, annealing box upper rear portion is provided with heat radiation pond, middle and lower part, the annealing box back side is provided with preheating pond, heat power thrust unit to be installed in preheating pond wherein one section extend to after the other end in annealing box extends and be connected with the pond counter structure that dispels the heat, heat radiation pond is connected with preheating pond by transition pipeline, preheating pond is connected with oil cooling device after installing oil pump by transition pipeline, the inlet mouth of blower fan is provided with directly over heat radiation pond, the air outlet of blower fan is arranged in annealing box, guide reel correspondence is distributed in annealing box front correspondence position, heat radiation pond counter structure is corresponding with reciprocating device to be connected, reciprocating device is connected with heat power thrust unit.
As further improvement of the utility model, described annealing box is by upper cover, base plate, be flexibly connected block, upper cover is installed on base plate right-hand member by being flexibly connected block, four spaced thermal baffles are straight down provided with in the middle part of base plate, bottom edge is provided with the hollow, rectangular coaming plate in vertical base plate front, base plate right-hand member top is provided with into silk mouth, enter silk mouth two ends and a guide reel is set respectively, be positioned at and on the left of first guide reel of base plate central zone, be provided with first piece of thermal baffle into silk mouth, this thermal baffle bottom is connected top with coaming plate and is not connected with coaming plate, another block thermal baffle top adjacent with this first piece of thermal baffle is connected bottom with coaming plate and is not connected with coaming plate, other thermal baffles are also arranged by this rule successively, the region upper and lower ends that often adjacent two pieces of thermal baffles surround all is respectively arranged with guide reel, upper cover for be flexibly connected one end of being connected of block and be provided with the tightening buckle matched with structure set by base plate, the top, region of first thermal baffle composition is provided with and is communicated with blower fan and degass the inlet pipe of mouth from right to left, two to four annealing silks are provided with in the region of second thermal baffle composition from right to left, heat power thrust unit counter structure is provided with in the region of the 3rd thermal baffle composition from right to left, the high order end of coaming plate is provided with the outlet window being communicated with annealing box inside.
As further improvement of the utility model, described oil cooling device is made up of oil cooling pond, guide reel, oil outlet pipe, oil cooling pond is open-topped hollow rectangular structure, directly over oil cooling pond, two ends are respectively arranged with a guide reel, two ends, middle and lower part, oil cooling pond are respectively arranged with a guide reel, bottom, oil cooling pond is arranged at the oil outlet pipe being communicated with heat radiation pond, and top, oil cooling pond is provided with the oil inlet pipe being communicated with preheating pond.
As further improvement of the utility model, described heat radiation pond is open-topped hollow rectangular structure, the baffle plate of single height lower than heat radiation pond pool wall height of vertical heat radiation pond basal surface is provided with in heat radiation pond, the cooling water wheels being socketed on the installation shaft in the pool wall of heat radiation pond and installing are provided with in the pond body of baffle plate right-hand member, installation shaft one end extends and is connected with reciprocating device counter structure, the heat radiation pond outlet being communicated with preheating pond is provided with bottom heat radiation pond, heat radiation top, pond or top are provided with the heat radiation pond oil inlet pipe being communicated with oil cooling device, cooling water wheels are disc, water coolant wheel outer surface is provided with equally distributed multiple oil of carrying and struggles against, carry oil bucket outside surface and be provided with through aperture.
As further improvement of the utility model, described heat power thrust unit is by catch bar, be heated cylinder, cooling cylinder, radiator element forms, wherein reciprocating device is socketed on catch bar one end, the catch bar the other end is installed in cooling cylinder after being provided with piston, be heated cylinder, cooling cylinder jointly form a hollow and together with " U " type pipe, wherein should be provided with top pressure closure in one end by " U " type pipe, the other end is provided with top pressure closure but is provided with catch bar sleeve joint hole in the middle of end socket, be provided with one section of catch bar sleeve joint hole for cooling cylinder, another section is for being heated cylinder be installed in annealing box, the partial outer face that cooling cylinder is installed in preheating pond is provided with radiator element, catch bar is socketed with in catch bar sleeve joint hole, one end that catch bar is arranged in cooling cylinder is provided with piston, the catch bar the other end is connected with reciprocating device, the part that catch bar is arranged in cooling cylinder is socketed with compression spring.
As further improvement of the utility model, described reciprocating device is made up of reciprocal frame, internal tooth, half gear, reciprocal frame is hollow, rectangular frame, the limit internal surface of the both sides, reciprocal frame one end be connected with heat power thrust unit is respectively arranged with internal tooth, reciprocal frame empty internal is socketed with half gear, half gear is that half is provided with the tooth that matches with internal tooth second half is the gear of circular arc, is socketed with heat radiation pond corresponding component in the middle part of half gear.
As further improvement of the utility model, described preheating pond is open-topped hollow rectangular parallelepiped, and top, preheating pond is provided with the preheating pond import being communicated with heat radiation pond, is provided with the preheating pond outlet being communicated with oil cooling device bottom preheating pond.
The utility model compared with prior art has following beneficial effect:
1, this apparatus structure is firm, can be transferred to other structures, also achieve the object of reduction organism temperature while improving capacity usage ratio preferably preferably by remaining heat fast speed after annealing.
Accompanying drawing explanation
Fig. 1 is a kind of high heat utilization efficiency annealing box internal structure schematic diagram;
Fig. 2 is a kind of high heat utilization efficiency annealing box external structure schematic diagram;
Fig. 3 is a kind of high heat utilization efficiency annealing box structural representation side-view;
Fig. 4 is a kind of high heat utilization efficiency annealing box set heat radiation pond and heat power thrust unit structural representation;
Fig. 5 is heat power thrust unit structural representation set by a kind of high heat utilization efficiency annealing box;
1-guide reel in figure; 2-oil cooling pond; 3-transition pipeline; 4-oil pump; 5-pneumatic tube; 6-inlet pipe; Guide reel in 7-case; 8-is flexibly connected block; 9-upper cover; 10-is incubated frame; 11-base plate; 12-thermal baffle; 13-anneals silk; 14-is heated cylinder; 15-outlet window; 16-oil outlet pipe; 17-oil cooling device; 18-unreeling shaft; 19-tightening buckle; 20-tensioning roller; 21-Scroll; 22-blower fan; 23-cools water wheels; 24-annealing box; 25-dispels the heat pond; 26-heat power thrust unit; 27-preheating pond; 28-preheating pond exports; 29-preheating pond import; 30-heat radiation pond outlet; 31-baffle plate; 32-carries oil bucket; 33-heat radiation pond pool wall; 34-installation shaft; 35-reciprocating device; 36-catch bar; 37-is heated cylinder; 38-cooling cylinder; 39-radiator element; 40-treats heat radiation oil; The reciprocal frame of 41-; 42-internal tooth; 43-piston; 44-compression spring; 45-half gear.
Embodiment
Embodiment 1
A kind of high heat utilization efficiency annealing box as shown in Figures 1 to 5, comprise oil cooling device 17, heat radiation pond 25, heat power thrust unit 26, preheating pond 27, oil pump 4, annealing box 24, guide reel 1, unreeling shaft 18, Scroll 21, tensioning roller 20, reciprocating device 35, wherein annealing box 24 contour structures is rectangular parallelepiped, on the right side of annealing box 24, bottom is provided with unreeling shaft 18, on the left of annealing box 24, bottom is provided with Scroll 21, on the left of unreeling shaft 18, oblique upper is provided with tensioning roller 20, on the right side of Scroll 21, oblique upper is provided with tensioning roller 20, left upper part corresponding annealing box 24 corresponding component place in annealing box 24 front is provided with oil cooling device 17, annealing box 24 upper rear portion is provided with heat radiation pond 25, middle and lower part, annealing box 24 back side is provided with preheating pond 27, heat power thrust unit 26 to be installed in preheating pond 27 wherein one section extend to after the other end in annealing box 24 extends and be connected with pond 25 counter structure that dispels the heat, heat radiation pond 25 is connected with preheating pond 27 by transition pipeline 3, preheating pond 27 is connected with oil cooling device 17 after installing oil pump 4 by transition pipeline 3, the inlet mouth of blower fan 22 is provided with directly over heat radiation pond 25, the air outlet of blower fan 22 is arranged in annealing box 24, guide reel 1 correspondence is distributed in annealing box 24 front correspondence position, heat radiation pond 25 counter structure is corresponding with reciprocating device 35 to be connected, reciprocating device 35 is connected with heat power thrust unit 26, described annealing box 24 is by upper cover 9, base plate 11, be flexibly connected block 8, upper cover 9 is installed on base plate 11 right-hand member by being flexibly connected block 8, four spaced thermal baffles 12 are straight down provided with in the middle part of base plate 11, base plate 11 edge is provided with the hollow, rectangular coaming plate in vertical base plate 11 front, base plate 11 right-hand member top is provided with into silk mouth, enter silk mouth two ends and a guide reel 1 is set respectively, be positioned at and on the left of first guide reel 1 of base plate 11 central zone, be provided with first piece of thermal baffle 12 into silk mouth, this thermal baffle 12 bottom is connected top with coaming plate and is not connected with coaming plate, another block thermal baffle 12 top adjacent with this first piece of thermal baffle 12 is connected bottom with coaming plate and is not connected with coaming plate, other thermal baffles 12 are also arranged by this rule successively, the region upper and lower ends that often adjacent two pieces of thermal baffles 12 surround all is respectively arranged with guide reel 1, upper cover 9 for be flexibly connected one end of being connected of block 8 and be provided with the tightening buckle 19 matched with structure set by base plate 11, the top, region that first thermal baffle 12 forms from right to left is provided with and is communicated with blower fan 22 and degass the inlet pipe of mouth, two to four annealing silks 13 are provided with in the region that second thermal baffle 12 forms from right to left, heat power thrust unit 26 counter structure is provided with in the region that 3rd thermal baffle 12 forms from right to left, the high order end of coaming plate is provided with the outlet window 15 being communicated with annealing box 24 inside, described oil cooling device 17 is by oil cooling pond 2, guide reel 1, oil outlet pipe 16 forms, oil cooling pond 2 is open-topped hollow rectangular structure, directly over oil cooling pond 2, two ends are respectively arranged with a guide reel 1, two ends, middle and lower part, oil cooling pond 2 are respectively arranged with a guide reel 1, bottom, oil cooling pond 2 is arranged at the oil outlet pipe 16 being communicated with heat radiation pond 25, top, oil cooling pond 2 is provided with the oil inlet pipe being communicated with preheating pond 27, described heat radiation pond 25 is open-topped hollow rectangular structure, the baffle plate 31 of single height lower than heat radiation pond pool wall 33 height of vertical heat radiation pond 25 basal surface is provided with in heat radiation pond 25, the cooling water wheels 23 being socketed on the installation shaft 34 in heat radiation pond pool wall 33 and installing are provided with in the pond body of baffle plate 31 right-hand member, installation shaft 34 one end extends and is connected with reciprocating device 35 counter structure, be provided with the heat radiation pond 25 being communicated with preheating pond 27 bottom heat radiation pond 25 to export, heat radiation top, pond 25 or top are provided with the heat radiation pond oil inlet pipe being communicated with oil cooling device 17, cooling water wheels 23 are disc, cooling water wheels 23 outside surface is provided with equally distributed multiple oil of carrying and struggles against 32, carry oil bucket 32 outside surfaces and be provided with through aperture, described heat power thrust unit 26 is by catch bar 36, be heated cylinder 37, cooling cylinder 38, radiator element 39 forms, wherein reciprocating device 35 is socketed on catch bar 36 one end, be installed on after catch bar 36 the other end is provided with piston 43 in cooling cylinder 38, be heated cylinder 37, cooling cylinder 38 jointly a composition hollow and together with " U " type pipe, wherein should be provided with top pressure closure in one end by " U " type pipe, the other end is provided with top pressure closure but is provided with catch bar sleeve joint hole in the middle of end socket, be provided with one section of catch bar sleeve joint hole for cooling cylinder 38, another section is for being heated cylinder 37 be installed in annealing box 24, cooling cylinder 38 partial outer face be installed in preheating pond 27 is provided with radiator element 39, catch bar 36 is socketed with in catch bar sleeve joint hole, catch bar 36 one end be arranged in cooling cylinder 38 is provided with piston 43, catch bar 36 the other end is connected with reciprocating device 35, catch bar 36 part be arranged in cooling cylinder 38 is socketed with compression spring 44, described reciprocating device 35 is by reciprocal frame 41, internal tooth 42, half gear 45 forms, reciprocal frame 41 is hollow, rectangular frame, the limit internal surface of the both sides, reciprocal frame 41 one end be connected with heat power thrust unit 26 is respectively arranged with internal tooth 42, reciprocal frame 41 empty internal is socketed with half gear 45, the tooth that half gear 45 matches with internal tooth 42 for half is provided with second half be the gear of circular arc, heat radiation pond 25 corresponding component is socketed with in the middle part of half gear 45, described preheating pond 27 is open-topped hollow rectangular parallelepiped, top, preheating pond 27 is provided with the preheating pond import 29 being communicated with heat radiation pond 25, the preheating pond outlet 30 being communicated with oil cooling device 17 is provided with bottom preheating pond 27.
Claims (7)
1. one kind high heat utilization efficiency annealing box, comprise oil cooling device (17), heat radiation pond (25), heat power thrust unit (26), preheating pond (27), oil pump (4), annealing box (24), guide reel (1), unreeling shaft (18), Scroll (21), tensioning roller (20), reciprocating device (35), it is characterized in that: annealing box (24) contour structures is rectangular parallelepiped, bottom, annealing box (24) right side is provided with unreeling shaft (18), bottom, annealing box (24) left side is provided with Scroll (21), oblique upper, unreeling shaft (18) left side is provided with tensioning roller (20), oblique upper, Scroll (21) right side is provided with tensioning roller (20), left upper part corresponding annealing box (24) corresponding component place in annealing box (24) front is provided with oil cooling device (17), annealing box (24) upper rear portion is provided with heat radiation pond (25), annealing box (24) middle and lower part, the back side is provided with preheating pond (27), heat power thrust unit (26) to be installed in preheating pond (27) wherein one section extend to after the interior the other end of annealing box (24) extends and be connected with pond (25) counter structure that dispels the heat, heat radiation pond (25) is connected with preheating pond (27) by transition pipeline (3), preheating pond (27) is installed oil pump (4) by transition pipeline (3) and is connected with oil cooling device (17) afterwards, the inlet mouth of blower fan (22) is provided with directly over heat radiation pond (25), the air outlet of blower fan (22) is arranged in annealing box (24), guide reel (1) correspondence is distributed in annealing box (24) front correspondence position, dispelling the heat, pond (25) counter structure is corresponding with reciprocating device (35) to be connected, reciprocating device (35) is connected with heat power thrust unit (26).
2. a kind of high heat utilization efficiency annealing box according to claim 1, it is characterized in that: described annealing box (24) is by upper cover (9), base plate (11), be flexibly connected block (8), upper cover (9) is installed on base plate (11) right-hand member by being flexibly connected block (8), base plate (11) middle part is provided with four spaced thermal baffles (12) straight down, base plate (11) edge is provided with the hollow, rectangular coaming plate in vertical base plate (11) front, base plate (11) right-hand member top is provided with into silk mouth, enter silk mouth two ends and a guide reel (1) is set respectively, be positioned at, into silk mouth, first guide reel (1) left side of base plate (11) central zone be provided with first piece of thermal baffle (12), this thermal baffle (12) bottom is connected top with coaming plate and is not connected with coaming plate, another block thermal baffle (12) top adjacent with this first piece of thermal baffle (12) is connected bottom with coaming plate and is not connected with coaming plate, other thermal baffles (12) are also arranged by this rule successively, the region upper and lower ends that often adjacent two pieces of thermal baffles (12) surround all is respectively arranged with guide reel (1), upper cover (9) is the tightening buckle (19) that the one end be connected with flexible connection block (8) is provided with that set structure matches with base plate (11), the top, region that first thermal baffle (12) forms from right to left is provided with and is communicated with blower fan (22) and degass the inlet pipe of mouth, two to four annealing silks (13) are provided with in the region that second thermal baffle (12) forms from right to left, heat power thrust unit (26) counter structure is provided with in the region that 3rd thermal baffle (12) forms from right to left, the high order end of coaming plate is provided with and is communicated with the inner outlet window (15) of annealing box (24).
3. a kind of high heat utilization efficiency annealing box according to claim 1, it is characterized in that: described oil cooling device (17) is by oil cooling pond (2), guide reel (1), oil outlet pipe (16) forms, oil cooling pond (2) is open-topped hollow rectangular structure, directly over oil cooling pond (2), two ends are respectively arranged with a guide reel (1), oil cooling pond (2) two ends, middle and lower part are respectively arranged with a guide reel (1), oil cooling pond (2) bottom is arranged at the oil outlet pipe (16) being communicated with heat radiation pond (25), oil cooling pond (2) top is provided with the oil inlet pipe being communicated with preheating pond (27).
4. a kind of high heat utilization efficiency annealing box according to claim 1, it is characterized in that: described heat radiation pond (25) is open-topped hollow rectangular structure, the baffle plate (31) of single height lower than heat radiation pond pool wall (33) height of pond of vertically dispelling the heat (25) basal surface is provided with in heat radiation pond (25), the cooling water wheels (23) being socketed on the installation shaft (34) in heat radiation pond pool wall (33) and installing are provided with in the pond body of baffle plate (31) right-hand member, installation shaft (34) one end extends and is connected with reciprocating device (35) counter structure, heat radiation pond (25) bottom is provided with heat radiation pond (25) outlet being communicated with preheating pond (27), heat radiation (25) top, pond or top are provided with the heat radiation pond oil inlet pipe being communicated with oil cooling device (17), cooling water wheels (23) is disc, cooling water wheels (23) outside surface is provided with equally distributed multiple oil of carrying and struggles against (32), carry oil bucket (32) outside surface and be provided with through aperture.
5. a kind of high heat utilization efficiency annealing box according to claim 1, it is characterized in that: described heat power thrust unit (26) is by catch bar (36), be heated cylinder (37), cooling cylinder (38), radiator element (39) forms, wherein reciprocating device (35) is socketed on catch bar (36) one end, catch bar (36) the other end is installed on after being provided with piston (43) in cooling cylinder (38), be heated cylinder (37), cooling cylinder (38) jointly a composition hollow and together with " U " type pipe, wherein should be provided with top pressure closure in one end by " U " type pipe, the other end is provided with top pressure closure but is provided with catch bar sleeve joint hole in the middle of end socket, be provided with one section of catch bar sleeve joint hole for cooling cylinder (38), another section is for the cylinder that is heated (37) and be installed in annealing box (24), cooling cylinder (38) partial outer face be installed in preheating pond (27) is provided with radiator element (39), catch bar (36) is socketed with in catch bar sleeve joint hole, catch bar (36) one end be arranged in cooling cylinder (38) is provided with piston (43), catch bar (36) the other end is connected with reciprocating device (35), catch bar (36) part be arranged in cooling cylinder (38) is socketed with compression spring (44).
6. a kind of high heat utilization efficiency annealing box according to claim 1, it is characterized in that: described reciprocating device (35) is by reciprocal frame (41), internal tooth (42), half gear (45) forms, reciprocal frame (41) is hollow, rectangular frame, the limit internal surface of reciprocal frame (41) both sides, one end be connected with heat power thrust unit (26) is respectively arranged with internal tooth (42), reciprocal frame (41) empty internal is socketed with half gear (45), the tooth that half gear (45) matches with internal tooth (42) for half is provided with second half be the gear of circular arc, half gear (45) middle part is socketed with heat radiation pond (25) corresponding component.
7. a kind of high heat utilization efficiency annealing box according to claim 1, it is characterized in that: described preheating pond (27) is open-topped hollow rectangular parallelepiped, preheating pond (27) top is provided with the preheating pond import (29) being communicated with heat radiation pond (25), and preheating pond (27) bottom is provided with preheating pond outlet (30) being communicated with oil cooling device (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520750101.0U CN205046165U (en) | 2015-09-25 | 2015-09-25 | Annealing box of high heat utilization efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520750101.0U CN205046165U (en) | 2015-09-25 | 2015-09-25 | Annealing box of high heat utilization efficiency |
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| Publication Number | Publication Date |
|---|---|
| CN205046165U true CN205046165U (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520750101.0U Expired - Fee Related CN205046165U (en) | 2015-09-25 | 2015-09-25 | Annealing box of high heat utilization efficiency |
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| Country | Link |
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| CN (1) | CN205046165U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803181A (en) * | 2016-04-15 | 2016-07-27 | 安徽富悦达电子有限公司 | High-current heating annealing device |
-
2015
- 2015-09-25 CN CN201520750101.0U patent/CN205046165U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803181A (en) * | 2016-04-15 | 2016-07-27 | 安徽富悦达电子有限公司 | High-current heating annealing device |
| CN105803181B (en) * | 2016-04-15 | 2018-06-29 | 安徽富悦达电子有限公司 | A kind of high current heating anneal device |
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| 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: 20160224 Termination date: 20210925 |
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| CF01 | Termination of patent right due to non-payment of annual fee |