CN210557731U - Automatic feeding device for valve seat ring - Google Patents
Automatic feeding device for valve seat ring Download PDFInfo
- Publication number
- CN210557731U CN210557731U CN201920958045.8U CN201920958045U CN210557731U CN 210557731 U CN210557731 U CN 210557731U CN 201920958045 U CN201920958045 U CN 201920958045U CN 210557731 U CN210557731 U CN 210557731U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- seat ring
- diameter
- lower limit
- height
- 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
- Lift Valve (AREA)
Abstract
The utility model belongs to the technical field of autoloading, a valve seat circle automatic feeding is provided, including feeding mechanism, diameter upper limit screening mechanism, diameter lower limit screening mechanism, high upper limit screening mechanism, high lower limit screening mechanism, positive reverse separating mechanism and seat circle alignment mechanism, feeding mechanism sends the valve seat circle into diameter go up/lower limit screening mechanism in proper order, pick out the qualified valve seat circle of diameter, then send into high go up/lower limit screening mechanism with the qualified valve seat circle of diameter in proper order, pick out qualified valve seat circle, then send into positive reverse separating mechanism with qualified valve seat circle, this device is sent out to positive valve seat circle, reverse valve seat circle then flows into and holds the alignment mechanism alignment back and then sends out this device. The utility model provides a valve seat circle material feeding unit not only can choose the valve seat circle that diameter and height value all meet the requirements, can put the valve seat circle that has turned over the pendulum in the valve seat circle separation that can turn over with the pendulum moreover and put.
Description
Technical Field
The utility model relates to an autoloading field technical field, concretely relates to valve seat insert automatic feeding.
Background
The cylinder cover is one of main parts of an engine, the machining precision of the cylinder cover greatly affects the performance of the engine, and particularly the machining precision of a valve seat ring directly affects the power and exhaust emission indexes of the engine. Therefore, when installing the valve seat ring, the selection of the proper valve seat ring is particularly necessary. The valve seat insert is installed in the process of manual feeding, whether the diameter and the height of the valve seat insert meet the requirements or not needs manual determination, whether the valve seat insert is reversely placed or not needs manual observation in the assembling process, the labor intensity of workers is increased, labor is wasted, and the working efficiency cannot be improved.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a valve seat insert automatic feeding for not only can choose the valve seat insert that diameter and height value all meet the requirements, can put forward the valve seat insert that will put forward when the valve seat insert separation that puts forward and put backward moreover.
In order to realize the above purpose, the utility model provides a valve seat insert automatic feeding, include:
the feeding mechanism is used for conveying the valve seat ring;
the diameter upper limit screening mechanism is used for selecting the unqualified valve seat ring with the diameter size exceeding the diameter upper limit value;
the diameter lower limit screening mechanism is used for selecting the unqualified valve seat ring with the diameter lower than the diameter lower limit value;
the height upper limit screening mechanism is used for sorting the unqualified valve seat ring with the height exceeding the height upper limit value;
the height lower limit screening mechanism is used for screening out unqualified valve seat rings with the height lower than the height lower limit value;
the forward and reverse separating mechanism is used for separating the valve seat rings which are positively swung and negatively swung; and
and the seat ring righting mechanism is used for righting the reversely-swung valve seat ring.
Further, the feeding mechanism includes: one-level pay-off track and valve seat circle tile piece, one-level pay-off track is equipped with pan feeding mouth and discharge gate, valve seat circle tile piece is the cylindricality, set up in one-level pay-off track top for fall upright valve seat circle or a plurality of valve seat circle singles of mutual overlap are spread.
Further, the diameter upper limit screening mechanism comprises a first-level valve seat ring slide way, an upper limit diameter screening device, a first push plate, a first inductor and a first air cylinder, the first-level valve seat ring slide way is a vertical slide way, the upper end and the lower end of the first-level valve seat ring slide way are respectively provided with a valve seat ring inlet and a valve seat ring outlet, the first-level valve seat ring slide way comprises at least 1 first-level single valve seat ring slide way, the cross section of the inner peripheral surface of the first-level single valve seat ring slide way is a rectangle, the length value of the long side of the first-level single valve seat ring slide way is arranged between the diameters of the valve seat rings which are 1-1.2 times, the length value of the short side of the first-level single valve seat ring slide way is arranged between the height value of the valve seat rings which are 1 time and the diameter value of the valve seat rings which are 1 time, the length, the cross section of the inner circumferential surface of the low and upper limit valve seat ring channel is rectangular, the length value of the long side is set as the upper limit value of the valve seat ring diameter, the length value of the short side is set between the height values of 1-1.2 times of the valve seat ring, the diameter screener exceeding the upper limit is arranged along the longitudinal direction, and the inlet of the first push plate is positioned under the outlet of the first-level valve seat ring slide way, the first push plate is arranged at one side of the inlet of the low upper limit valve seat ring channel in a sliding way, used for pushing the valve seat ring clamped at the inlet of the low upper limit valve seat ring channel, the diameter of which exceeds the upper limit value, away from the inlet of the low upper limit valve seat ring channel, the first inductor is arranged on one side of the first push plate facing the valve seat ring channel, the push rod of the first air cylinder is connected with the other side, back to the low upper limit valve seat ring channel, of the first push plate.
Further, the diameter lower limit screening mechanism comprises a lower limit diameter screening device, a second push plate, a second-stage feeding track, a second inductor and a second air cylinder, wherein the lower limit screening device is provided with at least 1 lower limit valve seat ring channel, the cross section of the inner circumferential surface of the lower limit valve seat ring channel is rectangular, the length of the long side of the inner circumferential surface is set to be the lower limit value of the diameter of the valve seat ring, the length of the short side of the inner circumferential surface is set to be 1-1.2 times of the height of the valve seat ring, the lower limit diameter screening device is longitudinally arranged, the inlet of the lower limit diameter screening device is located right below the outlet of the lower limit diameter screening device, the second push plate is arranged on one side of the inlet of the lower limit diameter screening device in a sliding mode and used for pushing the valve seat ring clamped at the inlet of the lower limit valve seat ring channel, the diameter of which exceeds the lower limit valve seat ring channel by the lower limit value, out of the inlet of the lower limit valve seat ring channel, the second And the second sensor is arranged on one side, facing the valve seat ring channel, of the second push plate and used for sensing whether a valve seat ring is clamped at the inlet of the low limit valve seat ring channel or not, and the push rod of the second cylinder is connected with the other side, facing away from the low limit valve seat ring channel, of the second push plate.
Furthermore, the upper-limit height screening mechanism comprises an upper-limit height limiter and a secondary valve seat ring slide way, a first material dividing port is formed in one side of the secondary feeding track, the upper-limit height limiter is cylindrical and is arranged above the secondary feeding track, the distance between the bottom of the upper-limit height limiter and the secondary feeding track in the vertical direction is the upper limit value of the valve seat ring height, and the upper-limit height limiter is obliquely arranged towards the other side along one side of the secondary feeding track provided with the first material dividing port, so that the first material dividing port and the upper-limit height limiter form a valve seat ring channel with the height value larger than the upper limit value of the valve seat ring height, the upper-limit height limiter bottom and the secondary feeding track form a valve seat ring channel with the height value smaller than the upper limit value of the valve seat ring height, an inlet of the secondary valve seat ring slide way is arranged at an outlet of the secondary, the two-stage valve seat ring slide way is provided with at least 1 two-stage single valve seat ring slide way, the cross section of the inner peripheral surface of the two-stage single valve seat ring slide way is rectangular, the length value of the long side of the two-stage single valve seat ring slide way is set between the diameters of 1-1.2 times of the valve seat ring, the length value of the short side of the two-stage single valve seat ring slide way is set between the height value of the 1 time of the valve seat ring and the diameter value of the 1 time of the valve seat ring.
Further, the height lower limit screening mechanism comprises a third-level feeding track, a lower limit height limiter and a third-level valve seat ring slide way, wherein an inlet of the third-level feeding track is communicated with an outlet of the second-level valve seat ring slide way, one side of the third-level feeding track is provided with a second material dividing port, the lower limit height limiter is arranged above the third-level feeding track, the distance between the bottom of the lower limit height limiter and the third-level feeding track in the vertical direction is the lower limit value of the valve seat ring height, and the lower limit height limiter and the third-level feeding track are obliquely arranged along one side of the third-level feeding track provided with the second material dividing port to the other side, so that the second material dividing port and the lower limit height limiter form a valve seat ring channel with the height value larger than the lower limit value of the valve seat ring height, and the bottom of the lower limit height limiter, and the three-level valve seat ring slide way is a single-valve seat ring slide way, and an inlet of the three-level valve seat ring slide way is arranged at the second material distributing opening.
Further, the forward and reverse separating mechanism comprises a four-level feeding track, a stop block and a four-level valve seat ring slide way, wherein an inlet of the four-level feeding track is arranged at an outlet of the three-level valve seat ring slide way, a third material distributing opening is formed in the side edge of the four-level feeding track, the stop block is arranged on the four-level feeding track, the thickness value of the stop block is smaller than the radius of a fillet of an outer ring of the valve seat ring, the stop block is obliquely arranged along one side of the four-level feeding track, which is provided with the third material distributing opening, to the other side, thus, the third material distributing opening and the stop block form a channel of a reversed valve seat ring, the top of the stop block and the four-level feeding track form a channel of a straightened valve seat ring, the bottom of the stop block is arranged to be a forward inclined plane or an arc in the same direction, the four-stage feeding track comprises at least 1 four-stage single-valve seat ring slide way, the cross section of the inner circumferential surface of each four-stage single-valve seat ring slide way is rectangular, the length value of the long side of each four-stage single-valve seat ring slide way is set between the diameters of 1-1.2 times of valve seat rings, the length value of the short side of each four-stage single-valve seat ring slide way is set between the height value of the 1 time of valve seat rings and the diameter value of the 1 time of valve seat rings, and the length.
Further, the structure of ajusting is including the slide of ajusting, the entry setting of the slide of ajusting is in third branch material mouth, the slide of ajusting only has a valve seat circle slide, and its bottom sets up to the reverse inclined plane or the cambered surface opposite rather than entrance valve seat circle direction of motion to make through the valve seat circle that wherein no radius angle touchs down one side go into before and the motion direction after coming out opposite, thereby realize the upset, the transversal rectangle of personally submitting of the inner peripheral surface of the slide of ajusting, its long limit length value sets up between the valve seat circle diameter of 1-1.2 times, and the short side length value sets up between the valve seat circle diameter value of 1 times valve seat circle height value to 1 times, and the short side length diminishes from the entrance to the exit gradually, in order the entering of realization valve seat circle.
Further, the four-stage valve seat ring slide way and the straightening slide way are used for conveying the valve seat ring into a five-stage feeding track.
The utility model has the advantages that: according to the technical scheme of telling, the utility model provides a valve seat insert automatic feeding includes feeding mechanism, diameter screening mechanism, high screening mechanism, positive reverse separating mechanism, puts right mechanism and frame. When the diameter size and the height size of the valve seat ring can be screened, the valve seat ring which is rightly placed and reversely placed can be separated, and the valve seat ring which is reversely placed is rightly placed, so that the labor intensity of workers is reduced, the labor force is reduced, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic perspective view of an automatic feeding device for valve seat rings according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a primary valve seat insert slide of the valve seat insert autoloading apparatus shown in FIG. 1;
FIG. 3 is a schematic perspective view of an upper diameter limit screening mechanism and a lower diameter limit screening mechanism of the automatic feeding device for valve seat rings shown in FIG. 1;
FIG. 4 is a schematic diagram of the diameter over-limit screener of the diameter over-limit screening mechanism shown in FIG. 3;
FIG. 5 is a schematic view of a lower diameter limit screen of the diameter lower limit screen mechanism shown in FIG. 3;
FIG. 6 is an enlarged view of portion A of FIG. 3;
FIG. 7 is an enlarged view of portion B of FIG. 3;
FIG. 8 is a schematic structural diagram of a height upper limit screening mechanism and a height lower limit screening mechanism of the automatic feeding device for valve seat rings shown in FIG. 1;
FIG. 9 is a cross-sectional view of the secondary valve seat insert slide shown in FIG. 8;
FIG. 10 is a schematic illustration of the three-stage valve seat insert slide shown in FIG. 8;
FIG. 11 is a schematic structural view of a forward and reverse separating mechanism and a seat ring aligning mechanism of the valve seat ring automatic feeding device shown in FIG. 1;
FIG. 12 is a schematic view of the aligning slide shown in FIG. 11;
FIG. 13 is a schematic view of the four-stage valve seat insert ramp of FIG. 11.
Reference numerals:
1-a feeding mechanism; 11-a primary feeding track; 12-valve seat ring flat; 2-diameter upper limit screening mechanism; 21-a primary valve seat ring slideway; 211-first level single valve seat ring slide; 212-a one-level single valve seat ring slideway splitter plate; 22-diameter-exceeding screener; 221-low upper limit valve seat ring channel; 222-a low upper limit valve seat ring passage divider plate; 23-a first push plate; 24-a first inductor; 25-a first cylinder; 26-a first recovery tank; 3-diameter lower limit screening mechanism; 31-low lower limit diameter screener; 311-low limit valve seat ring channel; 312-low limit valve seat ring channel divider plate; 32-a second pusher plate; 33-secondary feed rail; 331-a first material dividing port; 34-a second inductor; 35-a second cylinder; 36-a second recovery vessel; 4-height upper limit screening mechanism; 41-exceeding the upper limit height limiter; 42-secondary valve seat ring slide; 421-two-stage single valve seat ring slide way; 43-third recovery vessel; 5-a height lower limit screening mechanism; 51-three-level feeding track; 511 a second material distribution port; 52-three-level valve seat ring slide way; 53-low limit for height limit; 54-a fourth recovery vessel; 6-forward and reverse separating mechanism; 61-four-stage feeding rail 611-third material dividing port; 62-a stop block; 63-four-stage valve seat ring slide way; 64-seat ring centering mechanism; 7-seat ring aligning mechanism; 71-aligning the slideway; 8-five-level feeding track.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
In the description of the present application, it is to be understood that the terms "longitudinal," "length," "upper," "vertical," and the like refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 13, the present embodiment provides a valve seat ring automatic feeding device, including:
the feeding mechanism 1 is used for conveying the valve seat ring;
the diameter upper limit screening mechanism 2 is used for selecting unqualified valve seat rings with the diameter size exceeding the diameter upper limit value;
the diameter lower limit screening mechanism 3 is used for selecting the unqualified valve seat ring with the diameter lower than the diameter lower limit value;
the upper height limit screening mechanism 4 is used for selecting unqualified valve seat rings with the height exceeding the upper height limit value;
the lower height limit screening mechanism 5 is used for selecting unqualified valve seat rings with the height lower than the lower height limit value;
the forward and reverse separating mechanism 6 is used for separating the valve seat rings which are positively swung and negatively swung; and
and a seat ring aligning mechanism 7 for aligning the valve seat ring which is inversely aligned.
The working principle of the valve seat ring feeding mechanism 1 provided by the embodiment is as follows:
the valve seat ring is placed into the feeding mechanism 1, then the valve seat ring is sequentially fed into the diameter upper limit screening mechanism 2 and the diameter lower limit screening mechanism 3, the valve seat ring with qualified diameter is screened out, and the unqualified valve seat ring with the diameter exceeding the diameter upper limit value or being lower than the diameter lower limit value is kicked out. Then the valve seat rings with qualified diameters are sequentially sent into an upper height limit screening mechanism 4 and a lower height limit screening mechanism 5, the valve seat rings with qualified heights are screened out, and unqualified valve seat rings with height values exceeding the upper height limit value or being lower than the lower height limit value are kicked out. The valve seat rings screened by the diameter screening mechanism and the height screening mechanism are valve seat rings qualified in diameter and height, then the valve seat rings qualified in diameter and height are sent to the forward and reverse separating mechanism 6, the valve seat rings which are rightly and reversely arranged are separated, and the valve seat rings which are reversely arranged can be sent to the seat ring righting mechanism 7 to be rightly arranged. Therefore, the difficulty of manually screening whether the size of the valve seat ring is qualified is reduced, and the difficulty of manually identifying the forward direction and the reverse direction of the valve seat ring is also reduced, so that the working efficiency is improved.
As an improvement of the above solution, the feeding mechanism 1 includes: one-level pay-off track 11 and valve seat circle tile 12, one-level pay-off track 11 is equipped with pan feeding mouth and discharge gate, one-level pay-off track 11 can be slide, conveyer belt etc. make the valve seat circle move or take the device that the valve seat circle moved together, preferably to and pay-off track both sides are provided with side shield 13 to prevent that the valve seat circle from dropping from both sides. Valve seat circle tile 12 is the cylindricality, set up in one-level pay-off track 11 top, its bottom distance one-level pay-off track 11's distance sets up between 1-2 times valve seat circle height value for the valve seat circle single of overlapping is laid out or a plurality of each other with upright valve seat circle, preferably, valve seat circle tile 12 is provided with the chamfer angle towards the bottom of one side of supplied materials direction, so that valve seat circle tile 12 is laid upright valve seat circle or a plurality of mutual overlapping's valve seat circle of tiling and is opened more easily.
When the valve seat insert passes through the valve seat insert flat 12, the standing valve seat insert cannot pass through the bottom of the valve seat insert flat 12, and therefore the standing valve seat insert is in contact with the valve seat insert flat 12, and interaction force is generated to lay the valve seat insert flat 12 down. Similarly, a plurality of valve seats overlapping one another likewise cannot pass through the bottom of the valve seat insert tile 12, and under the interaction of the valve seats with the valve seat insert tile 12, will in turn be individually spread out to pass through the bottom of the valve seat insert tile 12. By the design, the valve seat ring can enter the next mechanism in a required mode.
As an improvement of the above scheme, the diameter upper limit screening mechanism 2 includes a first-stage valve seat ring slide way 21, an upper limit diameter screening device 22, a first push plate 23, a first inductor 24 and a first cylinder 25, the first-stage valve seat ring slide way 21 is a vertical slide way, the upper end and the lower end of the first-stage valve seat ring slide way are respectively provided with a valve seat ring inlet and a valve seat ring outlet, the first-stage valve seat ring slide way 21 includes at least 1 first-stage single valve seat ring slide way 211, preferably, the top of a first-stage single valve seat ring slide way partition plate 212 between the first-stage single valve seat ring slide ways 211 is wedge-shaped, so as to realize better shunting of a valve seat ring entering from the inlet of the first-stage valve seat ring slide way 21, the cross section of the inner peripheral surface of the first-stage single valve seat ring slide way 211 is rectangular, the length of the long side is set between 1-1.2 times of the diameter of the valve seat ring, the length of, and the length of the short side is gradually reduced from the inlet to the outlet, so that each primary single-valve seat ring slide way 211 can only enter one valve seat ring at a time, and the valve seat rings can sequentially and orderly enter the rear ultra-upper-limit diameter screener 22. The entry setting of one-level valve seat insert slide 21 is in the discharge gate of one-level pay-off track 11, preferably, the upper end of one-level valve seat insert slide 21 is provided with the arc spigot surface to do benefit to the valve seat insert and slide in smoothly. The sieve 22 with the diameter exceeding the upper limit is provided with at least 1 low and upper limit valve seat ring channel 221, and preferably, the top of a low and upper limit valve seat ring channel partition plate 222 between the low and upper limit valve seat ring channels 221 is set to be wedge-shaped, so that the valve seat ring can slide in conveniently. The cross section of the inner circumferential surface of the low and upper limit valve seat ring channel 221 is rectangular, the length value of the long side of the channel is set to be the upper limit value of the diameter of the valve seat ring, and the length value of the short side of the channel is set to be 1-1.2 times of the height value of the valve seat ring, so that the valve seat ring with the diameter larger than the upper limit value of the diameter of the valve seat ring can not pass through the low and upper limit valve seat ring channel 221, and the valve seat ring with the diameter smaller than the upper limit. The diameter screening device 22 with the upper limit is longitudinally arranged, an inlet of the diameter screening device is located under an outlet of the first-level valve seat ring slide rail 21, and preferably, the lower-upper-limit valve seat ring channel 221 corresponds to the first-level single-valve seat ring slide rail 211 one by one so as to improve the screening efficiency. The first push plate 23 is slidably disposed at one side of the inlet of the low upper limit valve seat ring channel 221, and is used for pushing the valve seat ring clamped at the inlet of the low upper limit valve seat ring channel 221, the diameter of which exceeds the upper limit value, out of the inlet of the low upper limit valve seat ring channel 221, and finally sending the valve seat ring into the first recovery container 26 disposed at one side of the inlet of the low upper limit valve seat ring channel 221, which is far away from the push plate. The first sensor 24 is disposed at one end of the first push plate 23 facing the valve seat ring channel, and is used for sensing whether the valve seat ring is clamped, and the push rod of the first cylinder 25 is connected to the other end of the first push plate 23 facing away from the lower upper limit valve seat ring channel 221.
The valve seat ring is sent into the first-level valve seat ring slide rail 21 from the feeding mechanism 1 and then slides into the lower upper limit valve seat ring channel 221, the unqualified valve seat ring with the diameter larger than the diameter upper limit value of the valve seat ring cannot pass through the lower upper limit valve seat ring channel 221, so that the valve seat ring is clamped at an inlet, the first inductor 24 generates induction at the moment, the first air cylinder 25 is started to push the push plate, the unqualified valve seat ring with the diameter exceeding the diameter upper limit value of the valve seat ring is pushed out from the other side, and finally the unqualified valve seat ring is sent into the first recycling container 26. Can kick out unqualified valve seat insert that the diameter exceeds valve seat insert diameter upper limit value like this, improved the efficiency of screening unqualified valve seat insert.
As an improvement of the above scheme, the diameter lower limit screening mechanism 3 includes a lower limit diameter screening device 31, a second push plate 32, a second-stage feeding track 33, a second inductor 34 and a second cylinder 35, where the lower limit diameter screening device 31 is provided with at least 1 lower limit valve seat ring channel 311, and preferably, the top of the lower limit valve seat ring channel partition plate 312 between the lower limit valve seat ring channels is set to be wedge-shaped, so as to facilitate the valve seat ring to enter the lower limit valve seat ring channel 311. The cross section of the inner circumferential surface of the low limit valve seat passage 311 is rectangular, the length of the long side of the low limit valve seat passage is set to be the lower limit value of the diameter of the valve seat, and the length of the short side of the low limit valve seat passage is set to be 1-1.2 times of the height of the valve seat, so that the valve seat with the diameter smaller than the lower limit value of the diameter of the valve seat can smoothly pass through the low limit valve seat passage 311 and is finally sent into a second recovery container 36 arranged below the low limit diameter screening device 31, and the valve seat with the diameter larger than the lower limit value of the diameter of the valve seat cannot pass through the low limit valve seat passage 311. The low limit diameter screener 31 is arranged along the longitudinal direction, an inlet of the low limit diameter screener is positioned under an outlet of the upper limit diameter screener 22, preferably, the low limit valve seat ring channel 311 corresponds to the low limit valve seat ring channel one by one, and the valve seat ring is favorable for entering the low limit valve seat ring channel 311. The second push plate 32 is slidably disposed on one side of the inlet of the lower limit diameter screening device 31, and is configured to push the valve seat clamped at the inlet of the lower limit valve seat passage 311, of which the diameter exceeds the lower limit value, out of the inlet of the lower limit valve seat passage 311. The secondary feed rail 33 is provided on a side of the entrance of the minimum diameter-exceeding screener 31 away from the second pusher plate 32. The second sensor 34 is disposed at an end of the second push plate 32 facing the valve seat ring channel, and is configured to sense whether a valve seat ring is clamped at an inlet of the low limit valve seat ring channel 311. The push rod of the second cylinder 35 is connected to the other end of the second push plate 32, which faces away from the low limit valve seat ring passage 311.
The valve seat ring with the diameter smaller than the upper limit value of the diameter of the valve seat ring from the lower upper limit valve seat ring channel 221 directly slides into the lower limit valve seat ring channel 311, the valve seat ring with the diameter larger than the lower limit value of the diameter of the valve seat ring cannot pass through, the second sensor 34 generates sensing, the second air cylinder 35 is started to push the second push plate 32 to slide, and therefore the valve seat ring clamped at the inlet of the lower limit valve seat ring channel 311 and with the diameter larger than the lower limit value of the diameter of the valve seat ring is pushed out from the other side and is sent into the secondary feeding track 33. And the valve seat insert with the diameter smaller than the lower limit value of the valve seat insert diameter directly flows into the second recovery tank 36 from the outlet at the bottom of the lower limit valve seat insert passage 311. Can kick out unqualified valve seat insert that the diameter is less than valve seat insert diameter lower limit value like this, improved the efficiency of screening unqualified valve seat insert.
As an improvement of the above scheme, the height upper limit screening mechanism 4 includes an upper limit limiter 41 and a second-level valve seat ring slide 42, a first material dividing port 331 is provided at one side of the second-level feeding track 33, the upper limit limiter 41 is cylindrical and is arranged above the second-level feeding track 33, the bottom of the second-level feeding track 33 is the upper limit value of the valve seat ring height in the vertical direction, and the second-level feeding track is inclined to the other side along one side of the second-level feeding track where the first material dividing port 331 is provided. Therefore, the first material dividing port 331 and the upper limit limiter 41 form a passage of the valve seat ring with the height value larger than the upper limit value of the valve seat ring height, the bottom of the upper limit limiter 41 and the second-stage feeding track 33 form a passage of the valve seat ring with the height value smaller than the upper limit value of the valve seat ring height, namely, the valve seat ring with the height value larger than the upper limit value of the valve seat ring height enters the first material dividing port 331 along the upper limit limiter 41 and finally enters the third recovery container 43 arranged below the first material dividing port 331, and the valve seat ring with the height value smaller than the lower limit value of the valve seat ring height passes through the bottom of the upper limit limiter 41. The inlet of the second-stage valve seat ring slide way 42 is arranged at the outlet of the second-stage feeding track 33, and preferably, the bottom of the second-stage valve seat ring slide way 42 is arranged to be an inclined surface or an arc surface along the sliding direction of the valve seat ring, so that the valve seat ring can slide into the next mechanism. The two-stage valve seat ring slide way 42 is provided with at least 1 two-stage single-valve seat ring slide way 421, the cross section of the inner peripheral surface of the two-stage single-valve seat ring slide way 421 is rectangular, the length value of the long side of the two-stage single-valve seat ring slide way is set between the diameters of the valve seat rings which are 1-1.2 times, the length value of the short side of the two-stage single-valve seat ring slide way is set between the height value of the valve seat rings which are 1 time and the diameter value of the valve seat rings which are 1 time and 1 time, and the length.
The valve seat ring from the diameter lower limit screening mechanism 3 enters the first material dividing port 331 along with the upper limit limiter 41 under the action of the upper limit limiter 41, the valve seat ring with the height value larger than the upper limit value of the height of the valve seat ring flows into the third recovery container 43, and the valve seat ring with the height value smaller than the upper limit value of the height of the valve seat ring flows into the second-stage valve seat ring slideway 42 through the bottom of the upper limit limiter 41. Therefore, the unqualified valve seat ring with the height value larger than the upper limit value of the valve seat ring height can be kicked out, and the efficiency of screening out the valve seat ring with the height value larger than the upper limit value of the valve seat ring height is improved.
As an improvement of the above scheme, the height lower limit screening mechanism 5 includes a third-level feeding track 51, a third-level valve seat ring slide way 52 and a lower limit height limiter 53, an inlet of the third-level feeding track 51 is communicated with an outlet of the second-level valve seat ring slide way, a second material dividing port 511 is provided at one side of the third-level feeding track 51, the third-level valve seat ring slide way 52 is a single-valve seat ring slide way, an inlet of the single-valve seat ring slide way is provided at the second material dividing port 511, the lower limit height limiter 53 is provided above the third-level feeding track 51, a distance between a bottom of the single-level feeding track and the third-level feeding track 51 in the vertical direction is a lower limit value of the valve seat ring height, and the single-valve seat ring slide way is obliquely arranged along one side of the third-level feeding track 51 where the second material dividing port 511 is provided, so that the second material dividing port 511, the third-, the bottom of the low height limit limiter 53 and the third-stage feeding track 51 form a channel of the valve seat ring with the height value smaller than the lower limit value of the height of the valve seat ring, namely, the valve seat ring with the height value larger than the lower limit value of the height of the valve seat ring slides into the second material dividing port 511 along the low height limit limiter 53 to enter the third-stage valve seat ring slide way 52, and the valve seat ring with the height value smaller than the lower limit value of the height of the valve seat ring passes through the bottom of the low height limit limiter 53 and finally flows into a fourth recovery container 54 arranged at the outlet of the third-stage feeding track 51.
The valve seat ring of the third-level feeding track 51 entering from the upper height limit screening mechanism 4 passes through the bottom of the lower height limit device 53 under the action of the lower height limit device 53, and is finally sent into a fourth recovery container 54, while the valve seat ring with the height value larger than the lower height limit device 53 enters a second material dividing port 511 along the lower height limit device 53, and slides into a third-level valve seat ring slide way 52. Therefore, the unqualified valve seat ring with the height value smaller than the lower limit value of the valve seat ring height can be kicked out, and the efficiency of screening the valve seat ring with the height value smaller than the lower limit value of the valve seat ring height is improved.
As an improvement of the above scheme, the forward and reverse separating mechanism 6 includes a four-stage feeding rail 61, a stop 62 and a four-stage valve seat ring slide 63, an inlet of the four-stage feeding rail 61 is disposed at an outlet of the three-stage valve seat ring slide 52, a side edge of the four-stage feeding rail 61 is provided with a third material dividing port 611, the stop 62 is disposed on the four-stage feeding rail 61, and has a thickness value smaller than a radius of a rounded corner of an outer ring of the valve seat ring, and the stop 62 is disposed along a side of the four-stage feeding rail 61 where the third material dividing port 611 is disposed to incline toward another side, so that the third material dividing port 611 and the stop 62 form a channel of the reversed valve seat ring, a top of the stop 62 and the four-stage feeding rail 61 form a channel of the valve seat ring that is centered, preferably, the four-stage feeding rail 61 is provided with a plurality of third material, to enhance the separation effect. The entry of level four valve seat insert slide 63 communicates with the export of level four pay-off track 61, and its bottom sets up to the forward inclined plane or the circular arc the same with its entrance valve seat insert direction of motion, level four valve seat insert slide 63 includes 1 level four single valve seat insert slide 631 at least, the cross section of the inner peripheral surface of level four single valve seat insert slide 631 is the rectangle, and its long limit length value sets up between 1-1.2 times valve seat insert diameter, and the setting of short side length value is between 1 times valve seat insert height value to 1 times valve seat insert diameter value, and the short side length diminishes from the entrance to the exit gradually.
And the valve seat ring is discharged from the lower height limit screening mechanism 5, enters the valve seat ring of the four-level feeding rail 61, enters the third material distributing port 611 along the block under the action of the stop block 62, and passes through the stop block 62 to finally enter the four-level valve seat ring slide rail 63. Therefore, the valve seat rings which are reversely placed and positively placed are separated, so that the installation of workers is facilitated, and the working efficiency is improved.
As an improvement of the above scheme, the seat ring straightening mechanism 7 includes a straightening slide way 71, an inlet of the straightening slide way 71 is disposed at the third material dividing port 611, the straightening slide way 71 has only one valve seat slide way, and a bottom of the straightening slide way is set to be a reverse inclined plane or an arc surface opposite to a valve seat motion direction at the inlet, so that the valve seat that is landed on one side without a fillet is moved in a forward direction and a backward direction, thereby realizing turning, a cross section of an inner circumferential surface of the straightening slide way 71 is rectangular, a length value of a long side of the straightening slide way is set between 1-1.2 times of a valve seat diameter, a length value of a short side of the straightening slide way is set between 1 time of the valve seat height and 1 time of the valve seat diameter, and the length of the short side of the straightening slide way gradually decreases from the inlet to the outlet, so as to.
The reversely-released valve seat ring separated from the forward and reverse separating mechanism 6 enters the righting slide way 71 from the third material dividing port 611, and the valve seat ring with the reverse side grounded is changed into the valve seat ring with the front side grounded, so that the valve seat ring is automatically righted, and the working efficiency is improved.
As an improvement of the scheme, the four-stage valve seat ring slide rail 63 and the straightening slide rail 71 both feed the valve seat ring into the five-stage feeding track 8. The qualified valve seat rings are converged into a five-stage feeding track and are uniformly conveyed, so that the feeding device is simple in structure.
In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. The utility model provides a valve seat insert automatic feeding which characterized in that includes:
the feeding mechanism (1) is used for conveying the valve seat ring;
the diameter upper limit screening mechanism (2) is used for selecting unqualified valve seat rings with the diameter size exceeding the diameter upper limit value of the valve seat rings;
the diameter lower limit screening mechanism (3) is used for selecting unqualified valve seat rings with the diameter lower than the diameter lower limit of the valve seat rings;
the upper limit of height screening mechanism (4) is used for selecting unqualified valve seat rings with the height exceeding the upper limit of the height of the valve seat rings;
the height lower limit screening mechanism (5) is used for selecting unqualified valve seat rings with the height smaller than the height lower limit value of the valve seat rings;
the forward and reverse separation mechanism (6) is used for separating the valve seat rings which are subjected to forward and reverse swinging; and
and a seat ring aligning mechanism (7) for aligning the valve seat ring which is inversely aligned.
2. The valve seat ring automatic feeding device according to claim 1, wherein the feeding mechanism (1) comprises a primary feeding track (11) and a valve seat ring flat piece (12), the primary feeding track (11) is provided with a feeding port and a discharging port, and the valve seat ring flat piece (12) is cylindrical and is arranged above the primary feeding track (11) and used for placing an upright valve seat ring or singly laying a plurality of mutually overlapped valve seat rings.
3. The valve seat ring automatic feeding device according to claim 2, wherein the diameter upper limit screening mechanism (2) comprises a first-level valve seat ring slide way (21), an upper limit diameter screening device (22), a first push plate (23), a first inductor (24) and a first cylinder (25), the first-level valve seat ring slide way (21) is a vertical slide way, the upper end and the lower end of the first-level valve seat ring slide way are respectively provided with a valve seat ring inlet and a valve seat ring outlet, the first-level valve seat ring slide way (21) comprises at least 1 first-level single valve seat ring slide way (211), the cross section of the inner circumferential surface of the first-level single valve seat ring slide way (211) is rectangular, the length value of the long side of the first-level single valve seat ring slide way is set between 1-1.2 times of the diameter of the valve seat ring, the length value of the short side of the first-level single valve seat ring slide way is set, the valve seat ring inlet of the first-level valve seat ring slide way (21) is arranged at the discharge hole of the first-level feeding track (11), the upper limit diameter screening device (22) is provided with at least 1 lower limit valve seat ring channel (221), the cross section of the inner circumferential surface of the lower limit valve seat ring channel (221) is rectangular, the length value of the long side of the lower limit valve seat ring channel is set to be the upper limit value of the valve seat ring diameter, the length value of the short side of the lower limit valve seat ring channel is set to be 1-1.2 times of the height value of the valve seat ring, the upper limit diameter screening device (22) is longitudinally arranged, the inlet of the upper limit diameter screening device is positioned under the outlet of the first-level valve seat ring slide way (21), the first push plate (23) is arranged on one side of the inlet of the lower limit valve seat ring channel (221) in a sliding mode and used for pushing the valve seat ring clamped at the inlet of the lower limit valve seat ring, the first sensor (24) is arranged on one side, facing the low upper limit valve seat ring channel (221), of the first push plate (23) and used for sensing whether a valve seat ring is clamped at the inlet of the low upper limit valve seat ring channel (221), and the push rod of the first air cylinder (25) is connected with the other side, facing away from the low upper limit valve seat ring channel (221), of the first push plate (23).
4. The valve seat ring automatic feeding device according to claim 3, wherein the diameter lower limit screening mechanism (3) comprises a lower limit diameter screening device (31), a second push plate (32), a secondary feeding track (33), a second inductor (34) and a second air cylinder (35), the lower limit diameter screening device (31) is provided with at least 1 lower limit valve seat ring channel (311), the cross section of the inner peripheral surface of the lower limit valve seat ring channel (311) is rectangular, the length of the long side is set to be the lower limit value of the valve seat ring diameter, the length of the short side is set to be 1-1.2 times of the height of the valve seat ring, the lower limit diameter screening device (31) is longitudinally arranged, the inlet of the lower limit diameter screening device is positioned right below the outlet of the upper limit diameter screening device (22), the second push plate (32) is slidably arranged on one side of the inlet of the lower limit diameter screening device (31), the valve retainer clamping device comprises a second-stage feeding track (33), a second inductor (34) and a second cylinder (35), wherein the second-stage feeding track is used for pushing a valve retainer clamped at the inlet of a low lower limit valve retainer channel (311) and the diameter of the valve retainer clamped at the inlet of the low lower limit valve retainer channel (311) exceeds the lower limit value of the diameter of the valve retainer channel (311) out of the inlet of the low lower limit valve retainer channel (311), the second-stage feeding track (33) is arranged on one side, away from the second push plate (32), of the inlet of a low lower limit diameter screener (31), the second inductor (34) is arranged on one side, facing the low lower limit valve retainer channel (311), of the second push plate (32) and used for inducing whether the valve retainer is clamped at the inlet of the low lower limit valve retainer channel (311), and a push rod of the second cylinder (35).
5. The valve seat ring automatic feeding device according to claim 4, wherein the height upper limit screening mechanism (4) comprises an upper limit limiter (41) and a secondary valve seat ring slide way (42), a first material distribution port (331) is formed in one side of the secondary feeding track (33), the upper limit limiter (41) is cylindrical and is arranged above the secondary feeding track (33), the distance between the bottom of the upper limit limiter and the secondary feeding track (33) is the upper limit value of the valve seat ring height, the upper limit limiter is arranged along one side of the secondary feeding track (33) where the first material distribution port (331) is arranged in an inclined manner towards the other side, the first material distribution port (331) and the upper limit limiter (41) form a valve seat ring channel with the height value larger than the upper limit value of the valve seat ring height, the upper limit limiter (41) bottom and the secondary feeding track (33) form a valve seat ring channel with the height value smaller than the upper limit value of the valve seat ring height, the entry setting of second grade valve seat insert slide (42) is in the export of second grade pay-off track (33), second grade valve seat insert slide (42) are equipped with 1 at least second grade single valve seat insert slide (421), the rectangle is personally submitted to the transversal of the inner peripheral surface of second grade single valve seat insert slide (421), and its long limit length value sets up between 1-1.2 times valve seat insert diameter, and the setting of minor face length value is between 1 times valve seat insert height value to 1 times valve seat insert diameter value, and the minor face length diminishes from the entrance to the exit gradually.
6. The valve seat ring automatic feeding device according to claim 5, wherein the height lower limit screening mechanism (5) comprises a third-level feeding track (51), a third-level valve seat ring slide way (52) and a lower limit height limiter (53), an inlet of the third-level feeding track (51) is communicated with an outlet of the second-level valve seat ring slide way, a second material dividing port (511) is formed in one side of the third-level feeding track (51), the third-level valve seat ring slide way (52) is a single-valve seat ring slide way, an inlet of the third-level valve seat ring slide way is arranged at the second material dividing port (511), the lower limit height limiter (53) is cylindrical and is arranged above the third-level feeding track (51), the distance between the bottom of the third-level feeding track (51) and the third-level feeding track (51) in the vertical direction is a lower limit value of the height of the valve seat ring, and the third-level feeding track (51), therefore, the second material dividing port (511) and the three-level valve seat ring slide way (52) and the low-lower limit height limiter (53) form a valve seat ring channel with the height value larger than the lower limit value of the valve seat ring height, and the bottom of the low-lower limit height limiter (53) and the three-level feeding track (51) form a valve seat ring channel with the height value smaller than the lower limit value of the valve seat ring height.
7. The valve seat ring automatic feeding device according to claim 6, wherein the forward and reverse separating mechanism (6) comprises a four-stage feeding track (61), a stop block (62) and a four-stage valve seat ring slide way (63), the inlet of the four-stage feeding track (61) is arranged at the outlet of the three-stage valve seat ring slide way (52), the side edge of the four-stage feeding track (61) is provided with a third material distributing opening (611), the stop block (62) is arranged on the four-stage feeding track (61) and has a thickness value smaller than the radius of the valve seat ring outer circle fillet, the stop block (62) is obliquely arranged along one side of the four-stage feeding track (61) provided with the third material distributing opening to the other side, the third material distributing opening (611) and the stop block (62) form a reversed valve seat ring channel, and the top of the stop block (62) and the four-stage feeding track (61) form a straightened valve seat ring channel, the entry of level four valve seat insert slide (63) and the export intercommunication of level four pay-off track (61), its bottom sets up to the forward inclined plane or the circular arc the same with its entrance valve seat insert direction of motion, level four pay-off track (61) include 1 level four single valve seat insert slide at least, the rectangle is personally submitted to the transversal of inner peripheral surface of level four single valve seat insert slide, and its long limit length value sets up between 1-1.2 times valve seat insert diameter, and the setting of short edge length value is between 1 times valve seat insert height value to 1 times valve seat insert diameter value, and the short edge length diminishes from the entrance to the exit gradually.
8. The valve seat ring automatic feeding device according to claim 7, wherein the seat ring aligning mechanism (7) comprises an aligning slide way (71), an inlet of the aligning slide way (71) is arranged at the third material distribution port (611), the aligning slide way (71) only has one valve seat ring slide way, the bottom of the aligning slide way is arranged to be a reverse inclined surface or an arc surface opposite to the moving direction of the valve seat ring at the inlet of the aligning slide way, so that the moving directions of the valve seat ring which is not grounded on one side of a fillet in the valve seat ring are opposite to the moving direction after the valve seat ring is fed in and discharged out, the cross section of the inner circumferential surface of the aligning slide way is rectangular, the length value of the long side of the aligning slide way is arranged between 1 and 1.2 times of the diameter of the valve seat ring, the length of the short side of the valve seat ring is arranged between 1 time of the height value of the valve seat ring and 1, to achieve orderly entry of the valve seat insert.
9. Valve seat insert autoloading apparatus as set forth in claim 8, wherein the four-stage valve seat insert slide (63) and the centering slide (71) each feed a valve seat insert into a five-stage feed rail (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920958045.8U CN210557731U (en) | 2019-06-21 | 2019-06-21 | Automatic feeding device for valve seat ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920958045.8U CN210557731U (en) | 2019-06-21 | 2019-06-21 | Automatic feeding device for valve seat ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210557731U true CN210557731U (en) | 2020-05-19 |
Family
ID=70625686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920958045.8U Expired - Fee Related CN210557731U (en) | 2019-06-21 | 2019-06-21 | Automatic feeding device for valve seat ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210557731U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203670A (en) * | 2019-06-21 | 2019-09-06 | 张钰柱 | A kind of valve retainer automatic feeding and its feeding method |
| CN111807028A (en) * | 2020-06-05 | 2020-10-23 | 深圳市微蓝智能科技有限公司 | Sheet-like material feeding machine |
-
2019
- 2019-06-21 CN CN201920958045.8U patent/CN210557731U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110203670A (en) * | 2019-06-21 | 2019-09-06 | 张钰柱 | A kind of valve retainer automatic feeding and its feeding method |
| CN110203670B (en) * | 2019-06-21 | 2024-03-01 | 重庆移通学院 | Automatic feeding device and feeding method for valve seat ring |
| CN111807028A (en) * | 2020-06-05 | 2020-10-23 | 深圳市微蓝智能科技有限公司 | Sheet-like material feeding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210557731U (en) | Automatic feeding device for valve seat ring | |
| CN107032095B (en) | A kind of bolt automatic charging device | |
| CN109878992B (en) | Feeding assembly and feeding device | |
| CN111994616A (en) | Automatic feeding equipment for straight pipe fittings | |
| CN105923385B (en) | A kind of bottle-sorting device | |
| CN107824479A (en) | A kind of bolt sorting unit | |
| CN110203670B (en) | Automatic feeding device and feeding method for valve seat ring | |
| CN109573552B (en) | Categorised receiving device of tubular product for building engineering | |
| CN109250202B (en) | Categorised material equipment that connects of tubular product for municipal works | |
| CN203108655U (en) | Aluminum scrap drying and deironing device | |
| CN208407749U (en) | A kind of blanking device of load sorting machine | |
| CN110465401A (en) | Fluidization screening installation control system and method | |
| CN209536493U (en) | A kind of feeding mechanism | |
| CN211225544U (en) | Quick collection device is used in processing of car seat support | |
| CN214568634U (en) | Automatic feeding device for pipe fitting machining | |
| CN212711575U (en) | Straight-through pipe fitting automatic feeding equipment | |
| CN211540887U (en) | Pill circulation purification system | |
| CN210815679U (en) | Multi-component fine material fluidization separation equipment | |
| CN212530238U (en) | Continuous arranging track for mosquito-repellent incense coils | |
| CN208856436U (en) | Steel pipe sorter charging gear | |
| CN205541094U (en) | A coin separation conveying mechanism for coin classification collects | |
| CN218574295U (en) | Different particle size powder carrier sorting unit | |
| CN206435820U (en) | A kind of nut automatic tapping machine | |
| CN220052480U (en) | Plastic particle vibration sorting equipment | |
| CN105583316B (en) | Discoid part automatic loading/unloading equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200519 Termination date: 20210621 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |