CN212537005U - Oil pipe quick connector for external pump station of vehicle hydraulic system - Google Patents
Oil pipe quick connector for external pump station of vehicle hydraulic system Download PDFInfo
- Publication number
- CN212537005U CN212537005U CN202021284718.5U CN202021284718U CN212537005U CN 212537005 U CN212537005 U CN 212537005U CN 202021284718 U CN202021284718 U CN 202021284718U CN 212537005 U CN212537005 U CN 212537005U
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- oil
- fixed
- cross
- connecting piece
- matched
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- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 11
- 210000001503 joint Anatomy 0.000 abstract description 11
- 239000004519 grease Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 46
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect 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
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
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- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The utility model belongs to the technical field of the oil pipe quick-operation joint, especially, be used for external pump station of vehicle hydraulic system to use oil pipe quick-operation joint, to current oil pipe quick-operation joint, the mounting means is too simple, and fixed effect is poor, and carries out filterable filter screen to the oil in the joint, inconvenient problem when dismantling. The following scheme is proposed, and the oil filter comprises a connecting piece, wherein an oil inlet and an oil outlet are respectively arranged at two ends of the connecting piece, filter screens are movably connected in the oil inlet and the oil outlet, and a first sealing ring movably connected in the oil inlet and the oil outlet is arranged on one side of each of the two filter screens. The utility model discloses in, under the effect of catch, can be fast fixed to the installation between connecting piece and the butt joint pipe, its convenient operation, fixed effectual, the convenient dismantlement through pop-up mechanism, simple quick when its filter screen is dismantled, the change is dismantled to the filter screen to the convenience, can make the ring scraper blade strike off connecting piece inner wall grease simultaneously in the dismantlement.
Description
Technical Field
The utility model relates to an oil pipe quick-operation joint technical field especially relates to a be used for external pump station of vehicle hydraulic system to use oil pipe quick-operation joint.
Background
The oil pipe joint is used for being provided with quick-operation joint in oil inlet and oil-out department, can directly be applied to special type vehicle, in addition, the later stage can be through the quick-operation joint of development different grade type to the vehicle of other models is applied to in the popularization.
The existing oil pipe quick connector is too simple in installation mode between the connector and a pipe fitting connected with a corresponding oil inlet and a corresponding oil outlet, the fixing effect is poor, a filter screen for filtering oil is arranged in the connector, the disassembly is inconvenient, in addition, when the filter screen is disassembled, oil dirt on the inner wall of the connector cannot be scraped, and therefore the oil pipe quick connector for the external pump station of the vehicle hydraulic system is designed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a be used for external pump station of vehicle hydraulic system to use oil pipe quick-operation joint has solved current oil pipe quick-operation joint, and the mounting means is too simple, and fixed effect is poor, and carries out filterable filter screen to the oil in the joint, inconvenient problem when dismantling.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a quick connector of an oil pipe for an external pump station of a vehicle hydraulic system comprises a connecting piece, wherein two ends of the connecting piece are respectively provided with an oil inlet and an oil outlet, filter screens are movably connected inside the oil inlet and the oil outlet, one side of each filter screen is provided with a first sealing ring movably connected inside the oil inlet and the oil outlet, a butt joint pipe is movably inserted inside the oil inlet and the oil outlet, a locking ring is connected between the two butt joint pipes and the connecting piece in a threaded manner, two sides of the outer wall of the connecting piece are respectively fixed with a fixed cylinder, an ejection mechanism is connected between the two fixed cylinders and the two filter screens, two ring scrapers movably arranged inside the connecting piece are arranged between the two fixed cylinders, two mounting rods are respectively arranged between the two ring scrapers and the two filter screens, two ends of the two mounting rods are respectively rotatably connected with a rotating shaft, the circular ring scraper and the filter screen are both provided with cross slots matched with the cross insertion blocks, and clamping mechanisms are connected between the cross slots and the cross insertion blocks.
Preferably, the pop-up mechanism comprises a movable block which is connected in the fixed cylinder in a sliding manner, guide blocks are fixed at two ends of the movable block, a guide groove matched with the guide blocks is formed in the inner wall of the fixed cylinder, a first spring is fixed between one side of the movable block and the inner wall of the fixed cylinder, and a support rod fixed on the filter screen is arranged at the other side of the movable block.
Preferably, the connecting piece and the fixed cylinder are both provided with a movable hole matched with the abutting rod, and the inner wall of the movable hole is provided with a second sealing ring.
Preferably, the chucking mechanism is including seting up the inner chamber one in cross inserted block, and the pivot extends to inner chamber one and is fixed with the rotation post, all be equipped with the inserted bar of sliding connection in cross inserted block around the rotation post, all set up in the cross inserted block with four inserted bar matched with activity grooves, the activity groove is linked together with inner chamber one, all set up on the rotation post with the one end matched with arc recess one of four inserted bars, one side of four arc recess one all is equipped with the arc piece of rigid coupling on the rotation post, all set up on four arc pieces with the one end matched with arc recess two of four inserted bars.
Preferably, the side walls of the four insertion rods are respectively fixed with a connecting block, one side of each movable groove is provided with a second inner cavity matched with the four connecting blocks, one end of each connecting block is fixed with a movable block, the inner wall of each second inner cavity is provided with a movable groove matched with the movable block, and a second spring is respectively fixed between one end of each connecting block and the inner wall of each second inner cavity.
Preferably, the inner wall of the cross-shaped slot is provided with jacks matched with the four insertion rods.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses in, under the effect of catch, can be fast fixed to the connecting piece with the installation between the butt joint pipe, its convenient operation, fixed effectual, the convenient dismantlement.
2. The utility model discloses among the pop-up mechanism, at the movable block, the guide block, spring one, support the cooperation of pole under, through turning round its catch that unloads, the pole that supports that its filter screen is connected can outwards shift out under the reaction of spring one, when shifting out simultaneously, its ring scraper blade intercommunication filter screen is together bounced department, and make the ring scraper blade strike off the greasy dirt on the connecting piece inner wall, it is simple quick when its filter screen is dismantled, the change is dismantled to the filter screen to the convenience, can make the ring scraper blade strike off the connecting piece inner wall greasy dirt simultaneously when dismantling, play good clean effect.
3. In the clamping mechanism of the utility model, through the matching of the inner cavity I, the rotating column, the inserting rods, the arc groove I, the connecting block, the inner cavity II, the moving block, the spring II, the arc block, the arc groove II and the jack, the cross inserting block rotationally connected with one end of the two mounting rods is inserted corresponding to the cross inserting groove arranged on the frame of the filter screen, the cross inserting block rotationally connected with the other end of the two mounting rods is inserted corresponding to the cross inserting groove arranged on the ring scraper, at the moment, the cross inserting block is inserted into the cross inserting groove and can not be rotated again by limiting, the mounting rods can be rotated manually, the rotating column connected with the rotating shaft connected with the mounting rods rotates in the inner cavity I, when the rotating column rotates, the arc-shaped ends on the four inserting rods respectively leave the arc groove I, and when the rotating column rotates, in curved one end can get into the arc recess two of arc piece on its four inserted bars, then its inserted bar passes through the connecting block and removes, its movable block compresses spring two, and four inserted bars can follow the activity inslot and shift out to insert four jacks of seting up on the inner wall of cross slot, thereby realize installing fixedly between filter screen and the ring scraper blade, through above setting, can conveniently be to the scraper blade, the dismantlement work between installation pole and the filter screen, the convenience is dismantled clearance or is changed the scraper blade.
Drawings
FIG. 1 is a schematic structural diagram of an upright view of a quick connector for an oil pipe for an external pump station of a vehicle hydraulic system according to the present invention;
FIG. 2 is a schematic structural view of a circular scraper for a quick connector of an oil pipe for an external pump station of a vehicle hydraulic system, according to the present invention;
FIG. 3 is a schematic structural view of a clamping mechanism for a quick connector of an oil pipe for an external pump station of a vehicle hydraulic system according to the present invention;
fig. 4 is an enlarged schematic structural diagram of a position a of the quick oil pipe joint for the external pump station of the vehicle hydraulic system, which is provided by the utility model;
fig. 5 is the utility model provides a B department enlargies's schematic structure diagram for external pump station of vehicle hydraulic system oil pipe quick-operation joint.
In the figure: 1. a connecting member; 2. filtering with a screen; 3. a first sealing ring; 4. butt-joint pipes; 5. a locking ring; 6. a fixed cylinder; 7. an ejection mechanism; 701. a movable block; 702. a guide block; 703. a first spring; 704. a support rod; 8. a circular scraper plate; 9. mounting a rod; 10. a rotating shaft; 11. a cross-shaped insert block; 12. a chucking mechanism; 1201. a first inner cavity; 1202. rotating the column; 1203. inserting a rod; 1204. a first arc-shaped groove; 1205. connecting blocks; 1206. a second inner cavity; 1207. a moving block; 1208. a second spring; 1209. an arc-shaped block; 1210. a second arc-shaped groove; 1211. a jack; 13. a cross-shaped slot.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-5, an oil pipe quick connector for an external pump station of a vehicle hydraulic system comprises a connecting piece 1, filter screens 2, a first sealing ring 3, a butt joint pipe 4, a locking ring 5, a fixed cylinder 6, an ejection mechanism 7, a movable block 701, a guide block 702, a first spring 703, a support rod 704, a circular scraper 8, a mounting rod 9, a rotating shaft 10, a cross-shaped insert block 11, a clamping mechanism 12, a first inner cavity 1201, a rotating column 1202, an insert rod 1203, a first arc-shaped groove 1204, a connecting block 1205, a second inner cavity 1206, a movable block 7, a second spring 1208, an arc-shaped block 1209, a second arc-shaped groove 1210, a jack 1211 and a cross-shaped slot 13, wherein two ends of the connecting piece 1 are respectively provided with an oil inlet and an oil outlet, the filter screens 2 are movably connected inside the oil inlet and the oil outlet, the first sealing rings 3 are movably connected to one side of the two filter screens 2, and the, equal threaded connection has a catch 5 between two butt joint pipes 4 and the connecting piece 1, the outer wall both sides of connecting piece 1 all are fixed with a solid fixed cylinder 6, all be connected with pop-up mechanism 7 between two solid fixed cylinders 6 and two filter screens 2, be equipped with two ring scraper blades 8 of movable mounting in connecting piece 1 inside between two solid fixed cylinders 6, all install two installation poles 9 between two ring scraper blades 8 and two filter screens 2, the both ends of two installation poles 9 are all rotated and are connected with pivot 10, the outside of every pivot 10 all is fixed with cross inserted block 11, all set up the cross slot 13 with cross inserted block 11 matched with on ring scraper blade 8 and the filter screen 2, be connected with chucking mechanism 12 between cross slot 13 and the cross inserted block 11, can realize filter screen 2 fast through chucking mechanism 12, butt joint installation or dismantlement work between installation pole 9 and the ring scraper blade 8.
Further, the pop-up mechanism 7 comprises a movable block 701 slidably connected in the fixed cylinder 6, guide blocks 702 are fixed at two ends of the movable block 701, guide grooves matched with the guide blocks 702 are formed in the inner wall of the fixed cylinder 6, a first spring 703 is fixed between one side of the movable block 701 and the inner wall of the fixed cylinder 6, a support rod 704 fixed on the filter screen 2 is arranged on the other side of the movable block 701, and the filter holes of the two filter screens 2 are different in size and can be used for filtering thick or thin impurities respectively.
Furthermore, the connecting piece 1 and the fixed cylinder 6 are both provided with a movable hole matched with the abutting rod 704, the inner wall of the movable hole is provided with a second sealing ring, and the phenomenon of oil leakage is avoided under the action of the second sealing ring.
Further, the clamping mechanism 12 includes a first inner cavity 1201 provided in the cross insert 11, the rotation shaft 10 extends into the first inner cavity 1201 and is fixed with a rotation column 1202, the periphery of the rotation column 1202 is provided with insert rods 1203 slidably connected in the cross insert 11, movable grooves matched with the four insert rods 1203 are provided in the cross insert 11, the movable grooves are communicated with the first inner cavity 1201, the rotation column 1202 is provided with first arc grooves 1204 matched with one ends of the four insert rods 1203, one side of the first arc grooves 1204 is provided with second arc grooves 1209 fixedly connected to the rotation column 1202, the four arc blocks 1209 are provided with second arc grooves 1210 matched with one ends of the four insert rods 1203, the cross insert 11 rotatably connected with one ends of the two installation rods 9 is inserted into the cross slot 13 provided on the frame of the filter screen 2, and the cross insert 11 rotatably connected with the other ends of the two installation rods 9 is inserted into the cross ring slot 13 provided on the cross ring scraper 8 The insertion is carried out, at the moment, the cross-shaped inserting block 11 is inserted into the cross-shaped slot 13 and can not rotate due to limitation, but the installation rod 9 can rotate manually, the rotating column 1202 connected with the rotating shaft 10 connected with the installation rod 9 rotates in the first inner cavity 1201, when the rotating column 1202 rotates, the arc-shaped ends of the four inserting rods 1203 leave the first arc-shaped groove 1204 respectively, and when the four inserting rods 1203 rotate, the arc-shaped ends of the four inserting rods 1203 can enter the second arc-shaped groove 1210 of the arc-shaped block 1209.
Further, all be fixed with connecting block 1205 on the lateral wall of four inserted bars 1203, two 1206 of inner chamber with four connecting block 1205 matched with are all seted up to one side in four activity grooves, the one end of four connecting block 1205 all is fixed with movable block 1207, set up the shifting chute with movable block 1207 matched with on the inner wall of two 1206 of inner chamber, all be fixed with two springs 1208 between the one end of four connecting block 1205 and the inner wall of two 1206 of four inner chambers, its inserted bar 1203 passes through connecting block 1205 and moves, its movable block 1207 compresses two springs 1208, and four inserted bars 1203 can follow the activity inslot and shift out, and insert four jacks 1211 that offer on the inner wall of cross slot 13, thereby realize installing fixedly between filter screen 2 and the ring scraper blade 8.
Furthermore, the inner wall of the cross slot 13 is provided with a plurality of insertion holes 1211 which are matched with the four insertion rods 1203, and when the insertion rods 1203 are inserted into the insertion holes 1211, the cross insertion block 11 and the cross slot 13 are clamped and fixed.
The working principle is as follows: when a worker needs to butt joint the connecting piece 1 with two butt joint pipes 4 on an external oil inlet pipe and an external oil outlet pipe, firstly, the cross-shaped insert block 11 rotationally connected with one end of each of two installation rods 9 is inserted corresponding to the cross-shaped slot 13 formed in the frame of the filter screen 2, meanwhile, the cross-shaped insert block 11 rotationally connected with the other end of each of the two installation rods 9 is inserted corresponding to the cross-shaped slot 13 formed in the ring scraper 8, at the moment, the cross-shaped insert block 11 is inserted into the cross-shaped slot 13 and is limited to be incapable of rotating, but the installation rods 9 can be rotated manually, the rotating column 1202 connected with the rotating shaft 10 connected with the installation rods 9 rotates in the first inner cavity 1201, when the rotating column 1202 rotates, the arc-shaped ends on the four insert rods 1203 leave the first arc-shaped groove 1204 respectively, and while rotating, the arc-shaped ends on the four insert rods 1203 can enter the second arc-shaped groove 1210 of the arc-shaped block 1209, then the inserting rod 1203 moves through the connecting block 1205, the moving block 1207 compresses the second spring 1208, and the four inserting rods 1203 can move out of the moving slot, and insert the four insertion holes 1211 formed on the inner wall of the cross slot 13, so as to realize the installation and fixation between the filter screen 2 and the circular scraper 8, then the two abutting rods 704 connected with the filter screen 2 are inserted into the two fixed cylinders 6 through the moving holes, respectively, the abutting rods 704 press the moving block 701, the first spring 703 is compressed, and during this operation, the two installed circular scrapers 8 are put into the connecting piece 1 together, the periphery of the circular scraper 8 is attached to the inner wall of the connecting piece 1, then the two sealing rings 3 are put into the oil inlet and the oil outlet, respectively, and the two butt-joint pipes 4 are inserted into the oil inlet and the oil outlet correspondingly, and press the butt-joint pipes 4 through manpower, the lock ring 5 is twisted on the butt joint pipe 4 and the thread of the connecting piece 1 is screwed, thereby realizing the rapid installation and fixation between the butt joint pipe 4 and the connecting piece 1, the operation is convenient, the efficiency is high, under the action of the filter screens 2 respectively arranged at the oil inlet and the oil outlet, the large impurities carried by the oil product when entering can be firstly filtered, meanwhile, the oil after being filtered by the layer can filter small impurities in the oil product under the action of the filter screen 2 arranged at the oil outlet, thereby improving the quality of fuel oil, and when the filter screen 2 needs to be disassembled, the lock ring 5 is disassembled by twisting, the rod 704 connected to the screen 2 can move outwards in the reaction of the first spring 703, and at the same time, the annular scraper 8 is communicated with the filter screen 2 and bounces together, and the annular scraper 8 scrapes oil dirt on the inner wall of the connecting piece 1.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. An oil pipe quick connector for an external pump station of a vehicle hydraulic system comprises a connecting piece (1) and is characterized in that two ends of the connecting piece (1) are respectively provided with an oil inlet and an oil outlet, filter screens (2) are movably connected inside the oil inlet and the oil outlet, a first sealing ring (3) movably connected inside the oil inlet and the oil outlet is arranged on one side of each of the two filter screens (2), butt-jointed pipes (4) are movably inserted inside the oil inlet and the oil outlet, locking rings (5) are connected between the two butt-jointed pipes (4) and the connecting piece (1) in a threaded manner, fixed cylinders (6) are fixed on two sides of the outer wall of the connecting piece (1), ejection mechanisms (7) are connected between the two fixed cylinders (6) and the two filter screens (2), and two ring scrapers (8) movably installed inside the connecting piece (1) are arranged between the two, two installation rods (9) are installed between two circular scraper blades (8) and two filter screens (2), two ends of the two installation rods (9) are connected with rotating shafts (10) in a rotating mode, the outer side of each rotating shaft (10) is fixedly provided with a cross insert block (11), cross slots (13) matched with the cross insert blocks (11) are formed in the circular scraper blades (8) and the filter screens (2), and clamping mechanisms (12) are connected between the cross slots (13) and the cross insert blocks (11).
2. The oil pipe quick connector for the external pump station of the vehicle hydraulic system is characterized in that the ejection mechanism (7) comprises a movable block (701) which is slidably connected into a fixed cylinder (6), guide blocks (702) are fixed at two ends of the movable block (701), a guide groove matched with the guide blocks (702) is formed in the inner wall of the fixed cylinder (6), a first spring (703) is fixed between one side of the movable block (701) and the inner wall of the fixed cylinder (6), and a supporting rod (704) fixed on the filter screen (2) is arranged at the other side of the movable block (701).
3. The quick connector for the oil pipe for the external pump station of the vehicle hydraulic system according to claim 1, wherein the connecting member (1) and the fixed cylinder (6) are both provided with a movable hole matched with the abutting rod (704), and the inner wall of the movable hole is provided with a second sealing ring.
4. The quick connector for the oil pipe of the external pump station of the vehicle hydraulic system as claimed in claim 1, the clamping mechanism (12) comprises a first inner cavity (1201) arranged in a cross insert block (11), a rotating shaft (10) extends into the first inner cavity (1201) and is fixedly provided with a rotating column (1202), insert rods (1203) which are connected into the cross insert block (11) in a sliding mode are arranged around the rotating column (1202), movable grooves matched with four insert rods (1203) are formed in the cross insert block (11), the movable grooves are communicated with the first inner cavity (1201), first arc grooves (1204) matched with one ends of the four insert rods (1203) are formed in the rotating column (1202), arc blocks (1209) fixedly connected onto the rotating column (1202) are arranged on one sides of the first arc grooves (1204), and second arc grooves (1210) matched with one ends of the four insert rods (1203) are formed in the four arc blocks (1209).
5. The oil pipe quick connector for the external pump station of the vehicle hydraulic system according to claim 4, wherein the side walls of the four insertion rods (1203) are fixed with connecting blocks (1205), one sides of the four movable grooves are provided with two inner cavities (1206) matched with the four connecting blocks (1205), one ends of the four connecting blocks (1205) are fixed with moving blocks (1207), the inner walls of the two inner cavities (1206) are provided with moving grooves matched with the moving blocks (1207), and two springs (1208) are fixed between one ends of the four connecting blocks (1205) and the inner walls of the two inner cavities (1206).
6. The quick connector for the oil pipe of the external pump station of the vehicle hydraulic system according to claim 1, wherein the inner walls of the cross-shaped slots (13) are provided with jacks (1211) matched with the four insertion rods (1203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021284718.5U CN212537005U (en) | 2020-07-03 | 2020-07-03 | Oil pipe quick connector for external pump station of vehicle hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021284718.5U CN212537005U (en) | 2020-07-03 | 2020-07-03 | Oil pipe quick connector for external pump station of vehicle hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212537005U true CN212537005U (en) | 2021-02-12 |
Family
ID=74522179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021284718.5U Expired - Fee Related CN212537005U (en) | 2020-07-03 | 2020-07-03 | Oil pipe quick connector for external pump station of vehicle hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212537005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692440A (en) * | 2020-07-03 | 2020-09-22 | 中国人民解放军32382部队 | Oil pipe quick connector for external pump station of vehicle hydraulic system |
| CN114607850A (en) * | 2022-02-10 | 2022-06-10 | 江苏力达实业科技有限公司 | Flange connecting piece with quick-release type filtering mechanism |
-
2020
- 2020-07-03 CN CN202021284718.5U patent/CN212537005U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692440A (en) * | 2020-07-03 | 2020-09-22 | 中国人民解放军32382部队 | Oil pipe quick connector for external pump station of vehicle hydraulic system |
| CN111692440B (en) * | 2020-07-03 | 2024-08-27 | 中国人民解放军32382部队 | Oil pipe quick connector for external pump station of vehicle hydraulic system |
| CN114607850A (en) * | 2022-02-10 | 2022-06-10 | 江苏力达实业科技有限公司 | Flange connecting piece with quick-release type filtering mechanism |
| CN114607850B (en) * | 2022-02-10 | 2023-07-25 | 江苏力达实业科技有限公司 | Flange connection piece with quick detach formula filtering mechanism |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210212 Termination date: 20210703 |