CN211801561U - Feeding and screening device of roller press - Google Patents
Feeding and screening device of roller press Download PDFInfo
- Publication number
- CN211801561U CN211801561U CN202020081730.XU CN202020081730U CN211801561U CN 211801561 U CN211801561 U CN 211801561U CN 202020081730 U CN202020081730 U CN 202020081730U CN 211801561 U CN211801561 U CN 211801561U
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- fixed
- horizontal screen
- sliding seat
- screen cloth
- storage hopper
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- 238000012216 screening Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 82
- 239000004744 fabric Substances 0.000 claims abstract description 40
- 238000003860 storage Methods 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims description 14
- 238000013519 translation Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 4
- 239000010421 standard material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000001095 motoneuron effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a roll squeezer feeding screening plant relates to roll squeezer feeding equipment technical field, which comprises a frame, be fixed with the backup pad in the frame, it is provided with the sliding seat to slide in the backup pad, be provided with horizontal reciprocating motion's horizontal screen cloth on the sliding seat, be provided with receipts workbin and conveyer in the frame, be fixed with the storage hopper in the frame, the upper end intercommunication of storage hopper has the receipts material pipe, it is located horizontal screen cloth under to receive the material pipe, the fixed and intercommunication of lower extreme of storage hopper has the discharging pipe, wear to be equipped with the spiral feed rod in the discharging pipe, be fixed with defeated material motor on the storage hopper, be fixed with the rotation motor in the frame. The utility model discloses in sieve the material to treating through the cooperation of telescopic link and horizontal screen cloth and sieve, the cooperation of connecting rod and horizontal screen cloth can shift the material that exceeds standard to receiving in the workbin simultaneously. The utility model discloses can be to waiting to sieve the material and screening the processing, clearance that simultaneously can be convenient material that exceeds standard has the effectual characteristics of screening.
Description
Technical Field
The utility model relates to a roll squeezer feeding equipment technical field especially relates to a roll squeezer feeding screening plant.
Background
The roller press is a grinding device widely used in cement production. The roller press has certain requirements on the granularity of materials, the materials with the granularity not more than 75mm are called standard materials, the standard materials cannot damage the roller press, the materials with the granularity more than 75mm are called standard exceeding materials, the standard exceeding materials can lead the roller press to be unstable in operation, and meanwhile, the roller pressing surface of the roller press is damaged.
In order to solve the problems, the Chinese patent with the patent publication number of CN209576997U provides a feeding and screening device of a cement roller press, which comprises an adjustable baffle which is arranged above the surface of a belt conveyor scraper-trough conveyer and stretches across the width of the belt conveyor scraper-trough conveyer, wherein the outlet of the belt conveyor scraper-trough conveyer is opposite to the inlet of an elevator, the outlet of the elevator is opposite to the feeding hole of the roller press, a grate is arranged at the upper end of the feeding hole of the roller press, and a horizontal sieve which horizontally reciprocates and a reciprocating mechanism which is connected with the horizontal sieve are arranged below the grate.
According to the technical scheme, the materials to be screened can be screened, but the screened standard-exceeding materials are left on the horizontal screen, so that the screening treatment of the subsequent materials is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a roll squeezer feeding screening plant can be to waiting to sieve the material and screening the processing, and the clearance that simultaneously can be convenient material that exceeds standard has the effectual characteristics of screening.
The utility model discloses a can realize through following technical scheme:
a feeding and screening device of a roller press comprises a rack, wherein a supporting plate is fixed on the rack, a sliding seat is slidably arranged on the supporting plate, a telescopic rod with horizontal reciprocating motion is arranged on the sliding seat, a connecting rod is arranged at one end, far away from the sliding seat, of the telescopic rod in a swinging manner, a horizontal screen is detachably connected at one end, far away from the telescopic rod, of the connecting rod, a receiving box for receiving overproof materials is arranged on the rack, a conveying belt is arranged on the rack, the discharging end of the conveying belt is positioned right above the horizontal screen, a storage hopper is fixed on the rack, the upper end of the storage hopper is communicated with a receiving pipe, the receiving pipe is positioned right below the horizontal screen, a discharging pipe is fixedly communicated at the lower end of the storage hopper, a spiral feeding rod penetrates through the discharging pipe, and a conveying motor for driving the spiral feeding rod to rotate is fixed on the storage hopper, and a rotating motor for driving the conveying belt to rotate is fixed on the rack.
Through adopting above-mentioned technical scheme, will wait to sieve the material and arrange in the conveying belt, under the effect of rotating the motor, wait to sieve the material and fall on horizontal screen cloth, horizontal screen cloth is sieved waiting to sieve the material under the effect of telescopic link horizontal reciprocating motion, standard material gets into material receiving pipe through horizontal screen cloth, fall into the storage hopper, screw feeding rod sends the standard material in the storage hopper into the roller press through the discharging pipe under defeated material motor effect, the material that exceeds standard stays on horizontal screen cloth, after accumulating certain material that exceeds standard on the horizontal screen cloth, the sliding seat drives horizontal screen cloth and slides, horizontal screen cloth swings under the effect of connecting rod and moves the material that exceeds standard to the material receiving box. The utility model discloses in sieve the material to treating through the cooperation of telescopic link and horizontal screen cloth and sieve, the material that exceeds standard on the clearance horizontal screen cloth that the cooperation of connecting rod and horizontal screen cloth can be convenient simultaneously. The utility model discloses can be to waiting to sieve the material and screening the processing, clearance that simultaneously can be convenient material that exceeds standard has the effectual characteristics of screening.
Further setting the following steps: the telescopic link is close to the one end of horizontal screen cloth is fixed with the montant and articulates there is the connecting rod, it has ejection of compact cylinder to articulate on the montant, ejection of compact cylinder's piston rod with the connecting rod is kept away from the one end of telescopic link is articulated.
By adopting the technical scheme, when the piston rod of the discharging cylinder extends out, the connecting rod drives the horizontal screen to swing towards one side close to the telescopic rod, so that the materials to be screened can be screened conveniently; when the piston rod of the discharging cylinder retracts, the connecting rod drives the horizontal screen to swing to one side far away from the telescopic rod, and standard exceeding materials can be conveniently moved out of the horizontal screen.
Further setting the following steps: the week side of horizontal screen cloth is fixed with two spacing strips, two have the clearance that supplies the material that exceeds standard to shift out horizontal screen cloth between the spacing strip, two the cooperation of pegging graft is provided with the separation blade between the spacing strip.
Through adopting above-mentioned technical scheme, spacing and separation blade reducible in the horizontal screen cloth horizontal migration in-process roll-off horizontal screen cloth wait the quantity of sieve material, when horizontal screen cloth was swung to being close to receipts workbin one side, pull out the separation blade, the horizontal screen cloth can be shifted out through the clearance to the material that exceeds standard.
Further setting the following steps: one side of the limiting strip, which is close to the separation blade, is provided with a groove, and two opposite side faces of the separation blade are respectively fixed with a convex strip which is in splicing fit with the groove.
Through adopting above-mentioned technical scheme, insert the separation blade and remove the quantity of the waiting to sieve material of in-process roll-off horizontal screen cloth of reducible horizontal screen cloth between two spacing, pull out the separation blade, can make things convenient for the material that exceeds standard on the horizontal screen cloth to shift out through the clearance.
Further setting the following steps: and the horizontal screen is connected with the connecting rod through a bolt.
Through adopting above-mentioned technical scheme, horizontal screen cloth can be convenient dismantlement and installation, is convenient for change horizontal screen cloth.
Further setting the following steps: the slide holder up end rotates and is provided with the cam and fixes two stoppers that are provided with, the telescopic link is worn to establish two the stopper and with the cam is contradicted, the cover is equipped with the spring on the telescopic link, the one end of spring with be close to the cam the stopper is fixed, the other end of spring with the telescopic link is close to the one end of cam is fixed, the drive has set firmly on the slide holder cam pivoted translation motor.
Through adopting above-mentioned technical scheme, under translation motor's effect, the cam promotes the telescopic link and removes to keeping away from sliding seat one side, and the spring is compressed this moment, and afterwards, the telescopic link removes to being close to sliding seat one side under the spring action, and the spring expandes this moment.
Further setting the following steps: the support plate is characterized in that two sliding guide rails are fixed on the upper end face of the support plate, two sliding grooves which are matched with the two sliding guide rails in a sliding mode are formed in the lower end face of the sliding seat, and a pushing cylinder for pushing the sliding seat to slide is fixedly arranged on the rack.
By adopting the technical scheme, after a certain amount of overproof materials are accumulated on the horizontal screen, the pushing cylinder pushes the sliding seat to slide towards one side far away from the pushing cylinder along the sliding guide rail, so that the overproof materials on the horizontal screen can be conveniently cleaned; after the excessive materials are cleaned, the pushing cylinder pulls the sliding seat to move towards one side close to the pushing cylinder, so that the subsequent screening treatment on the materials to be screened is facilitated.
To sum up, the utility model discloses a beneficial technological effect does:
(1) through the cooperation of the telescopic rod and the horizontal screen, the material to be screened can be rapidly screened;
(2) through the cooperation of connecting rod and horizontal screen cloth, the material that exceeds standard on the clearance horizontal screen cloth that can be convenient.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a top view of the present invention;
fig. 3 is a schematic view of the present invention in partial cross section (mainly showing the sliding seat, the horizontal screen and the baffle plate);
fig. 4 is a schematic view of the present invention in a partial cross section (mainly showing the storage hopper and the screw feeding rod).
Reference numerals: 1. a frame; 2. a support plate; 3. a sliding seat; 4. a telescopic rod; 5. a connecting rod; 6. a horizontal screen; 7. a material receiving box; 8. a conveyor belt; 9. a storage hopper; 10. a material receiving pipe; 11. a discharge pipe; 12. a screw feed rod; 13. a material conveying motor; 14. rotating the motor; 15. a vertical rod; 16. a discharging cylinder; 17. a limiting strip; 18. a gap; 19. a baffle plate; 20. a groove; 21. a convex strip; 22. a cam; 23. a limiting block; 24. a spring; 25. a translation motor; 26. a sliding guide rail; 27. a sliding groove; 28. and pushing the air cylinder.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1 and 3, for the utility model discloses a roll squeezer feeding screening plant, including frame 1, be fixed with the backup pad 2 that the level set up in frame 1, the terminal surface slides and is provided with sliding seat 3 in backup pad 2, and sliding of sliding seat 3 is realized through following setting: the up end of backup pad 2 is fixed with two parallel arrangement's slide rail 26, and two grooves 27 that slide have been seted up to the terminal surface under the sliding seat 3, and two grooves 27 that slide cooperate with two slide rail 26 respectively, are fixed with on the frame 1 and promote cylinder 28, and the piston rod that promotes cylinder 28 is fixed with sliding seat 3. When the piston rod of the pushing cylinder 28 extends out, the sliding seat 3 can be pushed to move towards one side far away from the pushing cylinder 28 along the sliding guide rail 26, and when the piston rod of the pushing cylinder 28 retracts, the sliding seat 3 can be enabled to move towards one side close to the pushing cylinder 28 along the sliding guide rail 26.
The up end of sliding seat 3 is provided with horizontal reciprocating motion's telescopic link 4, and the horizontal reciprocating motion of telescopic link 4 is realized through following setting: 3 up end of sliding seat rotates and is provided with cam 22 and fixed two stopper 23 that are provided with, the line direction of two stopper 23 is perpendicular with the extending direction of sliding guide rail 26, two stopper 23 and conflict with cam 22 are worn to establish by telescopic link 4, the cover is equipped with spring 24 on telescopic link 4, spring 24's one end is fixed near cam 22's one end with telescopic link 4, spring 24's the other end is fixed with stopper 23 near cam 22, be fixed with translation motor 25 on the sliding seat 3, translation motor 25 passes through the shaft coupling and is connected with the transmission of cam 22. Under the action of the translation motor 25, the cam 22 can push the telescopic rod 4 to move towards the side far away from the sliding seat 3, at the moment, the spring 24 is compressed, when the cam 22 continues to rotate, the spring 24 pushes the telescopic rod 4 to move towards the side near the sliding seat 3, and at the moment, the spring 24 is unfolded.
One end of the telescopic rod 4 far away from the sliding seat 3 is provided with a connecting rod 5 in a swinging way. The swinging of the connecting rod 5 is achieved by the following arrangement: the one end that sliding seat 3 was kept away from to telescopic link 4 extends sliding seat 3, and the lower terminal surface that sliding seat 3's one end was kept away from to telescopic link 4 is fixed with the montant 15 of vertical downward setting, and it has ejection of compact cylinder 16 to articulate on montant 15, and the one end that sliding seat 3 was kept away from to telescopic link 4 articulates there is connecting rod 5, and ejection of compact cylinder 16's piston rod is articulated with one side that telescopic link 4 was kept away from to connecting rod 5. When the piston rod of the discharging cylinder 16 extends out, the connecting rod 5 swings upwards, so that the telescopic rod 4 and the connecting rod 5 are positioned on the same straight line; when the piston rod of the discharging cylinder 16 retracts, the connecting rod 5 swings downwards.
Referring to fig. 2 and 3, one end of the connecting rod 5, far away from the telescopic rod 4, is connected with a horizontal screen 6 through a bolt, and the horizontal screen 6 can be conveniently detached and installed, so that the screen can be conveniently replaced in the subsequent use process. The frame 1 is provided with a material receiving box 7. Drive horizontal screen cloth 6 horizontal reciprocating motion during 4 horizontal reciprocating motion of telescopic link, the horizontal screen cloth 6 of being convenient for sieves the quick of material to waiting, standard material shifts out fast through horizontal screen cloth 6, the material that exceeds standard stays on horizontal screen cloth 6, material accumulation on the horizontal screen cloth 6 is after a certain amount, promote cylinder 28 and promote sliding seat 3 and slide, horizontal screen cloth 6 swings downwards along with connecting rod 5 under ejection of compact cylinder 16's effect, the material that exceeds standard on the horizontal screen cloth 6 falls into and receives in the workbin 7. Two limiting strips 17 are fixed on the peripheral side of the horizontal screen 6, a gap 18 is formed between the two limiting strips 17, and a blocking piece 19 is arranged between the two limiting strips 17 in an inserting and matching mode. The plug-in fit of the catch 19 is achieved by the following arrangement: two spacing strips 17 all set up the recess 20 of vertical setting near one side of separation blade 19, and the double-phase opposite side of separation blade 19 all is fixed with sand grip 21, and two sand grips 21 are pegged graft the cooperation with two recesses 20 respectively. When the piston rod of ejection of compact cylinder 16 stretched out, horizontal screen cloth 6 level set up, inserted separation blade 19 between two spacing 17, separation blade 19 can reduce the quantity of the waiting sieve material of roll-off horizontal screen cloth 6 with spacing 17 cooperation, and when ejection of compact cylinder 16's piston rod retracted, horizontal screen cloth 6 swung down, pulled out separation blade 19, and the convenient material that exceeds standard moves into in receiving workbin 7 through clearance 18.
Referring to fig. 1 and 2, a conveyor belt 8 is arranged on a frame 1, a discharging end of the conveyor belt 8 is located right above a horizontal screen 6, a rotating motor 14 is fixed on the frame 1, the rotating motor 14 can be a stepping motor, and the rotating motor 14 is in transmission connection with the conveyor belt 8. The materials to be screened are placed on the conveying belt, along with the rotation of the conveying belt, the materials to be screened fall on the horizontal screen 6 at a slow conveying speed so as to reduce the damage to the horizontal screen 6, and the horizontal screen 6 horizontally reciprocates to rapidly screen the materials to be screened.
Referring to fig. 2 and 4, a storage hopper 9 is fixed on the frame 1, a material receiving pipe 10 is fixed and communicated with the upper end of the storage hopper 9, one end of the material receiving pipe 10 far away from the storage hopper 9 is positioned right below the horizontal screen 6, and the area of the pipe end of the material receiving pipe 10 close to one end of the horizontal screen 6 is larger than that of the horizontal screen 6. The lower end of the storage hopper 9 is fixed and communicated with a discharge pipe 11, a spiral feeding rod 12 penetrates through the discharge pipe 11, a material conveying motor 13 is fixed on the upper end face of the storage hopper 9, and the material conveying motor 13 is in transmission connection with the spiral feeding rod 12 through a coupler. The standard material screened by the horizontal screen 6 falls into a material receiving pipe 10 and enters a material storage hopper 9, and enters a roller press through a material discharge pipe 11 under the action of a spiral feeding rod 12.
The utility model discloses a theory of operation and beneficial effect do:
the material to be sieved is placed on the conveying belt 8, the conveying belt 8 rotates to transfer the material to be sieved to the horizontal screen 6, the horizontal screen 6 is driven by the telescopic rod 4 to horizontally reciprocate to rapidly sieve the material to be sieved, the standard material falls into the storage hopper 9 through the material receiving pipe 10 through the horizontal screen 6 and enters the roller press through the discharge pipe 11 under the action of the spiral feeding rod 12, the pushing cylinder 28 pushes the sliding seat 3 to slide along the sliding guide rail 26, the horizontal screen 6 swings downwards under the drive of the connecting rod 5, the separation blade 19 is pulled out, and the overproof material left on the horizontal screen 6 falls into the material receiving box 7 through the gap 18. The utility model discloses a telescopic link 4 sieves the material fast with horizontal screen 6's cooperation to treating, and in addition, connecting rod 5 and horizontal screen 6's cooperation, the material that exceeds standard on clearance horizontal screen 6 that can be convenient. The utility model discloses can be to waiting to sieve the material and screening the processing, clearance that simultaneously can be convenient material that exceeds standard has the effectual characteristics of screening.
The above, only do the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (7)
1. The utility model provides a roll squeezer feeding screening plant, includes frame (1), its characterized in that: the automatic material collecting and feeding device is characterized in that a support plate (2) is fixed on the rack (1), a sliding seat (3) is arranged on the support plate (2) in a sliding manner, a telescopic rod (4) with horizontal reciprocating motion is arranged on the sliding seat (3), a connecting rod (5) is arranged at one end, far away from the sliding seat (3), of the telescopic rod (4) of the telescopic rod (5), a horizontal screen (6) is detachably connected at one end, far away from the telescopic rod (4), of the rack (1), a material collecting box (7) used for collecting standard-exceeding materials is arranged on the rack (1), a conveying belt (8) is arranged on the rack (1), a discharging end of the conveying belt (8) is located right above the horizontal screen (6), a storage hopper (9) is fixed on the rack (1), a material collecting pipe (10) is communicated with the upper end of the storage hopper (9), and the material collecting pipe (10) is located right below the, the lower extreme of storage hopper (9) is fixed and the intercommunication has discharging pipe (11), wear to be equipped with spiral feed rod (12) in discharging pipe (11), be fixed with the drive on storage hopper (9) spiral feed rod (12) pivoted defeated material motor (13), be fixed with the drive on frame (1) conveyer (8) pivoted rotation motor (14).
2. A roller press feed screening device as claimed in claim 1, wherein: the telescopic link (4) are close to the one end of horizontal screen (6) is fixed with montant (15) and articulates there are connecting rod (5), it has ejection of compact cylinder (16) to articulate on montant (15), the piston rod of ejection of compact cylinder (16) with connecting rod (5) are kept away from the one end of telescopic link (4) is articulated.
3. A roller press feed screening device as claimed in claim 2, wherein: the week side of horizontal screen cloth (6) is fixed with two spacing strips (17), two it shifts out to supply the material that exceeds standard to have between spacing strip (17) clearance (18) of horizontal screen cloth (6), two the cooperation of pegging graft between spacing strip (17) is provided with separation blade (19).
4. A roller press feed screening device as claimed in claim 3, wherein: one side of the limiting strip (17) close to the blocking piece (19) is provided with a groove (20), and protruding strips (21) which are matched with the groove (20) in an inserting mode are fixed on two opposite side faces of the blocking piece (19).
5. A roller press feed screening device as claimed in claim 4, wherein: the horizontal screen (6) is connected with the connecting rod (5) through a bolt.
6. A roller press feed screening device as claimed in claim 1, wherein: slide holder (3) up end rotates and is provided with cam (22) and fixed two stopper (23) that are provided with, telescopic link (4) are worn to establish two stopper (23) and with cam (22) are contradicted, the cover is equipped with spring (24) on telescopic link (4), the one end of spring (24) with be close to cam (22) stopper (23) are fixed, the other end of spring (24) with telescopic link (4) are close to the one end of cam (22) is fixed, the drive has set firmly on slide holder (3) cam (22) pivoted translation motor (25).
7. A roller press feed screening device as claimed in claim 1, wherein: two sliding guide rails (26) are fixed on the upper end face of the support plate (2), two sliding grooves (27) which are matched with the sliding guide rails (26) in a sliding mode are formed in the lower end face of the sliding seat (3) respectively, and a pushing cylinder (28) for pushing the sliding seat (3) to slide is fixedly arranged on the rack (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020081730.XU CN211801561U (en) | 2020-01-14 | 2020-01-14 | Feeding and screening device of roller press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020081730.XU CN211801561U (en) | 2020-01-14 | 2020-01-14 | Feeding and screening device of roller press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211801561U true CN211801561U (en) | 2020-10-30 |
Family
ID=72991796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020081730.XU Expired - Fee Related CN211801561U (en) | 2020-01-14 | 2020-01-14 | Feeding and screening device of roller press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211801561U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420405A (en) * | 2020-11-09 | 2021-02-26 | 刘亚刚 | Dry pressing device for manufacturing high-capacity ceramic capacitor |
| CN116351690A (en) * | 2023-05-31 | 2023-06-30 | 哈尔滨理工大学 | Auxiliary device for earthworm packaging |
-
2020
- 2020-01-14 CN CN202020081730.XU patent/CN211801561U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420405A (en) * | 2020-11-09 | 2021-02-26 | 刘亚刚 | Dry pressing device for manufacturing high-capacity ceramic capacitor |
| CN116351690A (en) * | 2023-05-31 | 2023-06-30 | 哈尔滨理工大学 | Auxiliary device for earthworm packaging |
| CN116351690B (en) * | 2023-05-31 | 2023-08-15 | 哈尔滨理工大学 | Auxiliary device for earthworm packaging |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |