CN107990078B - Throttling socket joint type pipe joint - Google Patents
Throttling socket joint type pipe joint Download PDFInfo
- Publication number
- CN107990078B CN107990078B CN201710956213.5A CN201710956213A CN107990078B CN 107990078 B CN107990078 B CN 107990078B CN 201710956213 A CN201710956213 A CN 201710956213A CN 107990078 B CN107990078 B CN 107990078B
- Authority
- CN
- China
- Prior art keywords
- socket
- wall
- sealing
- insertion part
- throttling
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to a throttling socket type pipe joint, which solves the defects that a straight-wall socket joint is adopted in the pipe joint in the prior art, a gap is easily generated at a contact part, and sealing is affected. A sealing sleeve is arranged between the outer wall of the inserting part and the inner wall of the socket part, the sealing sleeve is provided with a sealing flap, the outer diameter part of the sealing flap forms a sealing surface, and after the inserting part and the socket part are oppositely inserted, the sealing flap is deformed and attached to the inner wall of the socket part to form a plurality of sealing parts, so that the sealing effect is improved; the sealing flap has elasticity, and the sealing flap has the internal stress of recovering the original shape after being out of shape, and still can guarantee the sealing effect when connecting tubular product and taking place the skew.
Description
Technical Field
The invention belongs to the field of drainage pipes, and particularly relates to a throttling socket joint type pipe joint.
Background
The water discharge pipe can not be opened in urban construction, and the water discharge pipe generally adopts plastic pipes, such as a PE water discharge pipe and a PVC water discharge pipe.
The length of the pipe is limited by transportation and installation, and the pipe cannot be manufactured according to the whole length of the laying requirement, so that the pipe needs to be connected through a pipe joint in the actual laying process.
The pipe joint is used for connecting two adjacent pipes, and the connection tightness needs to be considered during connection. Most of the existing pipe joints are in contact with a straight wall, and gaps are easily generated at the contact parts of the straight wall, so that water leakage is caused during connection. In order to ensure the connection tightness, a sealing ring is arranged at the position of a pipe joint, but the existing sealing ring is mostly a standard sealing ring, such as an O-shaped ring or a rhombic ring, and the sealing ring is easy to lose efficacy when two pipes are deflected, so that the tightness is affected.
After the pipe joint is connected, after the pipe joint is used for a long time, the sealing performance can be reduced, at the moment, the drain pipe needs to be maintained, and a new sealing ring needs to be replaced again. But the existing socket type pipe joint has great difficulty in maintenance.
Disclosure of Invention
The invention solves the defects that the straight wall socket joint is adopted in the pipe joint in the prior art, the contact part is easy to generate gaps, and the sealing is influenced, and provides the throttling socket joint type pipe joint.
The invention also solves the defect that the sealing ring in the prior art is easy to generate a gap due to the deflection of the pipe and influences the connection sealing performance of the pipe, and provides the throttling socket pipe joint.
The invention also solves the defect that the existing socket pipe joint is inconvenient to maintain, and provides the throttling socket pipe joint.
The specific technical scheme of the invention is as follows: the utility model provides a throttle socket joint formula coupling, is including can be each other to bellmouth and the socket of inserting, and the socket has grafting portion, and the bellmouth has socket portion, and the internal diameter of socket portion and the external diameter looks adaptation of grafting portion are provided with the seal cover between the outer wall of grafting portion and the inner wall of socket portion, are interference fit between the internal diameter of seal cover and the outer wall of grafting portion, and the outside axial of seal cover is provided with the independent sealing lamella of a plurality of rings mutual intervals, and the external diameter of sealing lamella is greater than the diameter of socket portion. A sealing sleeve is arranged between the outer wall of the inserting part and the inner wall of the socket part, the sealing sleeve is provided with a sealing flap, the outer diameter part of the sealing flap forms a sealing surface, and after the inserting part and the socket part are oppositely inserted, the sealing flap is deformed and attached to the inner wall of the socket part to form a plurality of sealing parts, so that the sealing effect is improved; the sealing flap has elasticity, and the sealing flap has the internal stress of recovering the original shape after being out of shape, and still can guarantee the sealing effect when connecting tubular product and taking place the skew.
Further, the seal cover includes the base member and sets up the sealing lamella on the base member outer wall, and multichannel sealing lamella has different sealed internal diameter, and the sealed internal diameter of the sealing lamella towards the socket side is minimum, and the sealed internal diameter of the sealing lamella far away from the socket side is the biggest, and the diameter of the outer wall of base member is less than the external diameter of grafting portion.
Furthermore, the sealing flap is a conical surface facing the socket side, the small-diameter end of the conical surface faces the end part direction of the insertion part, the other side of the sealing flap is a radial surface, and a sunken deformation concave part is arranged on the radial surface of the sealing flap far away from the socket side.
Furthermore, the outer wall of the insertion part is provided with a circle of groove, the sealing sleeve is sleeved in the groove, and the outer diameter of the base body of the sealing sleeve is smaller than that of the insertion part; the inner wall of the sealing sleeve is provided with a raised inner sealing convex ring.
Furthermore, a circle of waterproof ring is arranged on the outer wall of the insertion part, the middle of the waterproof ring is a pointed top, and the outer diameter of the pointed top is larger than that of the insertion part.
Further, the periphery of the end face of the insertion part is provided with a contact end inclined plane, the inner wall of the socket is provided with an inner inclined plane, the contact end inclined plane and the inner inclined plane have the same inclination angle, and when the insertion part is inserted into the socket part oppositely, the contact end inclined plane is contacted with the inner inclined plane.
Furthermore, the outer wall of the socket insertion part is provided with an external thread, and the external thread is in clearance fit with the inner wall of the socket part; or the inner wall of the socket part is provided with internal threads close to the end part, and the internal threads are in clearance fit with the outer wall of the insertion part. When the pipe connection part is maintained, the external thread or the internal thread is arranged, so that maintenance personnel can directly inject the filling sealant into the thread part, and the connection reliability of the pipe joint is further ensured.
Further, the end of the pipe hole of the insertion part is provided with an inner horn mouth, the inside of the socket is provided with a horn head matched with the inner horn mouth, an inner ring groove is formed between the outer wall of the horn head and the inner wall of the socket part, and the inner ring groove is matched with the end of the insertion part. The position of horn mouth and horn head can be changed, and after horn head and the cooperation of horn mouth, rivers just can cross the joint gap between grafting portion tip and the socket joint portion, therefore the setting of horn head should be corresponding with the direction of rivers.
Furthermore, a plurality of circles of rectangular grooves are arranged on the outer wall of the insertion part, and convex rings are formed at the positions and are axially arranged along the insertion part, and the convex rings are mutually spaced and independent; the outer wall of the socket is provided with outer convex rings which are arranged independently at intervals along the axial direction of the socket.
Furthermore, the outer wall of the bellmouth is also provided with spaced and independent axial ribs which are arranged along the circumferential direction of the bellmouth, and the axial ribs are intersected with the outer convex ring; the outer wall of the bellmouth is also provided with a connecting ring, and the section of the connecting ring is triangular.
The invention has the beneficial effects that: a sealing sleeve is arranged between the outer wall of the inserting part and the inner wall of the socket part, the sealing sleeve is provided with a sealing flap, the outer diameter part of the sealing flap forms a sealing surface, and after the inserting part and the socket part are oppositely inserted, the sealing flap is deformed and attached to the inner wall of the socket part to form a plurality of sealing parts, so that the sealing effect is improved; the sealing flap has elasticity, and the sealing flap has the internal stress of recovering the original shape after being out of shape, and still can guarantee the sealing effect when connecting tubular product and taking place the skew.
Drawings
FIG. 1 is a schematic diagram of one configuration of the present invention;
FIG. 2 is a schematic view of a second embodiment of the present invention;
FIG. 3 is a schematic view of a third embodiment of the present invention;
FIG. 4 is a schematic diagram of a fourth embodiment of the present invention;
FIG. 5 is a schematic diagram of a fifth configuration of the present invention;
FIG. 6 is a schematic view of a sixth construction of the socket of the present invention;
in the figure: 1. the water-proof sealing ring comprises a socket, 2, an outer retaining ring, 3, a convex ring, 4, a groove, 5, a sealing sleeve, 6, a plug-in part, 7, a contact end inclined plane, 8, a socket, 9, an inner inclined plane, 10, an outer reinforcing inclined rib, 11, an outer convex ring, 12, a sealing valve, 13, a deformation concave part, 14, a water-proof ring, 15, a tip, 16, an external thread, 17, an internal thread, 18, an inner bell mouth, 19, an inner ring groove, 20, a bell head, 21, a connecting ring, 22 and an axial rib.
Detailed Description
The invention is further described by the following specific embodiments in conjunction with the accompanying drawings.
Example 1: the utility model provides a throttle socket joint formula coupling, including bellmouth and the socket that can be mutual to inserting, the socket has grafting portion, the bellmouth has socket portion, the internal diameter of socket portion and the external diameter looks adaptation of grafting portion, be provided with the seal cover between the outer wall of grafting portion and the inner wall of socket portion, be interference fit between the internal diameter of seal cover and the outer wall of grafting portion, the outside of seal cover is provided with the independent sealing lamella of a plurality of rings mutual intervals along the axial, the sealing lamella is circumference and arranges, the external diameter of sealing lamella is greater than the diameter of socket portion.
The sealing sleeve is sleeved outside the inserting part after being expanded, the inserting part is inserted into the socket part, the outer diameter part of the sealing segment is turned over, and the sealing segment is always attached to the inner wall of the socket part under the action of restoring force.
Example 2: a throttling socket type pipe joint (see figure 1) comprises a socket 8 and a spigot 1 which can be mutually inserted, wherein the spigot is provided with an inserting part 6, the socket is provided with a socket part, the inner diameter of the socket part is matched with the outer diameter of the inserting part, the outer wall of the inserting part is provided with a circle of concave grooves 4, and the grooves are positioned in the middle of the outer wall of the inserting part. The plug part is chamfered at the periphery of the end face and forms a contact end bevel 7. The outside of socket still is provided with outer fender ring 2 of round, and outer fender ring is in the middle part of socket, and the external diameter of outer fender ring is greater than the external diameter of tubular product. The end face of the other end of the socket corresponding to the outer baffle ring is connected with the pipe in a hot melting way. The position between grafting portion outer wall recess and the outer fender ring is provided with a plurality of independent rectangular channels of circle to form bellied bulge loop 3 at this position, the bulge loop that is close to the recess is triangle-shaped, and all the other bulge loops are the rectangle, and the bulge loop is along grafting portion axial distribution.
The sealing sleeve 5 is arranged on the groove in an interference fit mode, the sealing sleeve is arranged on the groove in a sleeved mode and is expanded, the sealing sleeve comprises a base body and a plurality of sealing flaps 12 which are arranged on the outer wall of the base body and are separated from each other at intervals along the axial direction, the outer diameter of the base body of the sealing sleeve is smaller than that of the insertion portion, the sealing flaps are arranged in the circumferential direction, and the outer diameter of each sealing flap is larger than that of the socket portion. The sealing inner diameters of the sealing flaps facing the socket side are the smallest, the sealing inner diameters of the sealing flaps far away from the socket side are the largest, and the diameter of the outer wall of the base body is smaller than the outer diameter of the inserting part. The sealing flap is a conical surface facing the socket side, the small-diameter end of the conical surface faces the end part direction of the insertion part, the other side of the sealing flap is a radial surface, and a concave deformation concave part 13 is arranged on the radial surface of the sealing flap far away from the socket side.
The socket is provided with a socket and a conical part, the inner wall of the conical part is provided with an inner inclined plane 9, the inner inclined plane has the same inclination angle as the contact end inclined plane, and when the insertion part is inserted into the socket, the contact end inclined plane is contacted with the inner inclined plane. The outer wall of the bell and spigot is provided with outer convex rings 11 which are arranged independently at intervals along the axial direction of the bell mouth. The outer wall of the conical part is provided with a triangular outer reinforcing diagonal rib 10 which is arranged in the axial direction and circumferentially along the outer conical surface of the conical part. The insertion part and the socket part have the same inner diameter of the pipe hole after being inserted oppositely.
Example 3: a throttling socket type pipe joint (see figure 2) is different from the embodiment 2 in that a circle of waterproof ring 14 is arranged on the outer wall of an inserting part, a pointed top 15 is arranged in the middle of the waterproof ring, the outer diameter of the pointed top is larger than that of the inserting part, and the waterproof ring is in interference fit with the inner wall of the socket part. The waterproof ring is arranged at the position of the convex ring of the outer wall of the inserting part, and the rest of the structure refers to the embodiment 1.
Example 4: a throttle socket pipe joint (refer to figure 3) is different from embodiment 3 in that an external thread 16 is arranged on the outer wall of an inserting part between a waterproof ring and an outer baffle ring, the external thread is in clearance fit with the inner wall of a socket part, and when a pipe connecting part is maintained, a maintenance worker can directly inject a filling sealant into a thread part, so that the connection reliability of the pipe joint is ensured, and a drain pipe can be continuously used. The rest of the structure is referred to example 3.
Example 5: a throttle socket pipe joint (see figure 4) is different from the embodiment 4 in that the inner wall of a socket part is provided with an internal thread 17 near the end part, and the internal thread is in clearance fit with the outer wall of a plug part. The rest of the structure is referred to example 4.
Example 6: a throttle socket pipe joint (see figure 5) is different from the above embodiment in that the end of the pipe hole of the insertion part is provided with an inner bell mouth 18, the inside of the spigot is provided with a bell head 20 matched with the inner bell mouth, an inner ring groove 19 is formed between the outer wall of the bell head and the inner wall of the socket part, and the inner ring groove is matched with the end of the insertion part. Or the horn head is arranged at the end part of the insertion part, and the inner horn mouth is arranged in the socket part. The remaining structure refers to other embodiments.
When assembled, the horn head is generally oriented in the same direction as the water discharge.
Example 7: a kind of throttling socket joint type union joint (refer to fig. 6), the difference is that the outer wall of the bell mouth also has interval and independent axial rib 22 that is arranged along the circumference of the bell mouth, the axial rib intersects with the evagination ring; the outer wall of the bellmouth is also provided with a connecting ring 21, and the section of the connecting ring is triangular. The remaining structure refers to other embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (9)
1. A throttling socket type pipe joint is characterized by comprising a socket and a spigot which can be mutually inserted, wherein the spigot is provided with an inserting part, the socket is provided with a socket part, the inner diameter of the socket part is matched with the outer diameter of the inserting part, a sealing sleeve is arranged between the outer wall of the inserting part and the inner wall of the socket part, the inner diameter of the sealing sleeve and the outer wall of the inserting part are in interference fit, a plurality of rings of mutually spaced and independent sealing flaps are axially arranged outside the sealing sleeve, and the outer diameter of each sealing flap is larger than the diameter of the socket part; the outer wall of the insertion part is provided with a circle of waterproof ring, the middle of the waterproof ring is a pointed top, the outer diameter of the pointed top is larger than that of the insertion part, and the waterproof ring is in interference fit with the inner wall of the socket part.
2. The throttling female coupling according to claim 1, wherein the sealing boot includes a base body and sealing flaps provided on an outer wall of the base body, the plurality of sealing flaps have different sealing inner diameters, the sealing inner diameter of the sealing flap toward the socket side is smallest and the sealing inner diameter of the sealing flap away from the socket side is largest, and the outer wall of the base body has a diameter smaller than the outer diameter of the male portion.
3. The throttling female pipe coupling according to claim 1, wherein the seal land is tapered toward the socket side, a small diameter end of the tapered surface faces in a direction of an end of the male fitting, and the other side of the seal land is a radial surface, wherein a concave deformation recess is provided on the radial surface of the seal land away from the socket side.
4. The throttling socket pipe joint according to claim 1, 2 or 3, wherein the outer wall of the insertion part is provided with a circle of groove, the sealing sleeve is sleeved in the groove, and the outer diameter of the base body of the sealing sleeve is smaller than that of the insertion part; the inner wall of the sealing sleeve is provided with a raised inner sealing convex ring.
5. The throttling female pipe coupling according to claim 1, wherein the outer circumference of the end surface of the insertion part is provided with a contact end inclined surface, the inner wall of the socket is provided with an inner inclined surface, the contact end inclined surface has the same inclination angle as the inner inclined surface, and the contact end inclined surface is in contact with the inner inclined surface when the insertion part is inserted into the female part.
6. The throttling female pipe joint according to claim 1, 2, 3 or 5, wherein the outer wall of the female insertion part is provided with external threads, and the external threads are in clearance fit with the inner wall of the female insertion part; or the inner wall of the socket part is provided with internal threads close to the end part, and the internal threads are in clearance fit with the outer wall of the insertion part.
7. The throttling female pipe joint according to claim 1, 2, 3 or 5, wherein the end of the pipe hole of the insertion part is provided with an inner bell mouth, the inside of the spigot is provided with a bell head matched with the inner bell mouth, an inner annular groove is formed between the outer wall of the bell head and the inner wall of the female part, and the inner annular groove is matched with the end of the insertion part.
8. The throttling female pipe joint according to claim 1, 2, 3 or 5, wherein the outer wall of the insertion part is provided with a plurality of circles of rectangular grooves and a raised convex ring is formed at the position, the convex rings are axially arranged along the insertion part, and the convex rings are mutually spaced and independent; the outer wall of the socket is provided with outer convex rings which are arranged independently at intervals along the axial direction of the socket.
9. The throttling female pipe joint according to claim 8, wherein the outer wall of the socket is further provided with spaced and independent axial ribs arranged circumferentially of the socket, the axial ribs intersecting the outer convex ring; the outer wall of the bellmouth is also provided with a connecting ring, and the section of the connecting ring is triangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710956213.5A CN107990078B (en) | 2017-10-15 | 2017-10-15 | Throttling socket joint type pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710956213.5A CN107990078B (en) | 2017-10-15 | 2017-10-15 | Throttling socket joint type pipe joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107990078A CN107990078A (en) | 2018-05-04 |
| CN107990078B true CN107990078B (en) | 2021-02-12 |
Family
ID=62028905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710956213.5A Active CN107990078B (en) | 2017-10-15 | 2017-10-15 | Throttling socket joint type pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107990078B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662316B (en) * | 2018-07-25 | 2023-08-15 | 江苏润德管业有限公司 | Drain pipe with socket joint |
| CN111922173A (en) * | 2020-09-29 | 2020-11-13 | 浙大宁波理工学院 | Multi-stage omega-shaped pipe fluctuation internal high-pressure forming process |
| CN111922174A (en) * | 2020-10-16 | 2020-11-13 | 浙大宁波理工学院 | Device for forming by high pressure in wave |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2653268Y (en) * | 2003-06-27 | 2004-11-03 | 绵阳新晨动力机械有限公司 | Low pressure pipe joint seal structure |
| CN102213351A (en) * | 2010-04-02 | 2011-10-12 | 永高股份有限公司 | Introversion type flexible sealing device for water supply pipe fittings |
| CN205806474U (en) * | 2016-07-06 | 2016-12-14 | 金华市宏昌电器有限公司 | A kind of pipeline connects sealing structure |
| CN206191104U (en) * | 2016-09-20 | 2017-05-24 | 天津市久盛通达科技有限公司 | Ground that structure is only taken off in area buries formula feedwater socket joint formula welding steel pipe |
| CN106764165B (en) * | 2016-12-01 | 2018-07-17 | 江西浙丰管业有限公司 | It is a kind of to be convenient for using the close tubing with connection of Push-fit |
| CN106678474B (en) * | 2017-01-24 | 2019-05-14 | 浙江飞龙管业有限公司 | It is a kind of close with the tubing connected convenient for use Push-fit |
-
2017
- 2017-10-15 CN CN201710956213.5A patent/CN107990078B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107990078A (en) | 2018-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107990078B (en) | Throttling socket joint type pipe joint | |
| AU2013313188B2 (en) | Protected integral metal to metal seal | |
| CN106439262A (en) | HDPE socket and spigot joint steel belt strengthening corrugated pipe | |
| CN206206865U (en) | Pipe fitting fast joint | |
| CN206973097U (en) | From locking stereoplasm tube connecting parts | |
| CN207349624U (en) | One kind throttling inserting pipe joints | |
| CN107061902A (en) | A kind of anti-pulling flexible tube interface | |
| CN203560427U (en) | Rubber seal ring used for connecting socket of steel belt pipe with spigot of steel belt pipe | |
| CN209278662U (en) | Pipe joint | |
| CN201318517Y (en) | Pipe connector | |
| CN207349666U (en) | Throttle inserting pipe joints | |
| CN215215160U (en) | Solid wall pipe is prevented leaking by anticreep | |
| CN209960034U (en) | Adapter of washing machine drain pipe | |
| KR20190002238U (en) | Pipe connecting structure with excellent earthquake-proof performance | |
| CN209557853U (en) | High-adaptability pipeline connecting structure and its water segregator and valve | |
| CN203068017U (en) | Improved direct-push connection pipe joint | |
| CN205896490U (en) | Elasticity valve flange that resets | |
| CN206206866U (en) | Pipe fitting fast joint | |
| CN209876259U (en) | High-sealing high-strength connector for pipes with winding structures | |
| CN110107760A (en) | A kind of bellows with socket self-locking function | |
| CN215293584U (en) | Flexible pipe interface rubber ring | |
| CN205298884U (en) | Compound coupling of high -rise building feedwater | |
| CN205298929U (en) | Compound coupling of feedwater | |
| CN205503031U (en) | Adapter sleeve for oil drilling | |
| CN203730965U (en) | Small-pipe diameter easy-to-install rapid spigot and faucet pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 101, Building 6, 68 Lane 1445 Kangshen Road, Zhoupu Town, Pudong New Area, Shanghai, 201318 Applicant after: Shanghai Ruihuang Pipe Technology Co.,Ltd. Address before: 201318 Lane 123, Shenmei Road, Pudong New Area, Shanghai Applicant before: SHANGHAI RUIHUANG PIPE INDUSTRY TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |