http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-216043655-U
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_437d62aaad5ca98dca58354deebef4be |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B34-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B17-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B43-04 |
| filingDate | 2021-11-08^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-15^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0d700646ed1a9809305d4dfc19905f56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45eee4fbe743974bfad26323517150db http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8523c959d390e6c797705d55d4bea4b7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5a5c3972897ee009078ac10469a68b74 |
| publicationDate | 2022-03-15^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-216043655-U |
| titleOfInvention | Reverse gravel throwing device |
| abstract | The utility model discloses a reverse gravel feeding device.A gravel feeding valve body comprises an adapter, a lower branch pipe, a gravel non-return cover plate and a reset element, wherein the top end of the adapter is used for being connected with a built-in filter, the bottom end of the adapter is hermetically connected with the top end of the lower branch pipe, the gravel non-return cover plate is movably connected to a port at the bottom end of the adapter, a sand setting hole capable of preventing gravel from passing is arranged on the gravel non-return cover plate, the reset element can provide reset force to enable the gravel non-return cover plate to keep blocking the port at the bottom end of the adapter, and a diversion trench is arranged at the bottom end of the lower branch pipe; connect the body top be used for with throw gravel pipe sealing connection, connect the body bottom and connect the propelling movement pole, insert in the adapter and with adapter sealing connection when connecting the body bottom, the propelling movement pole can overcome reset element reset force and promote and open gravel material non return apron. The utility model ensures that the gravel material is not discharged back, the gravel material non-return cover plate can not rebound due to the change of water flow, the gravel throwing effect is ensured, the accumulation of settled sand in the built-in filter can be avoided, the pumping and injecting effect is ensured, and the well washing cost is reduced. |
| priorityDate | 2021-11-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419512635 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 |
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