CN207034456U - Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding - Google Patents
Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding Download PDFInfo
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- CN207034456U CN207034456U CN201720730662.3U CN201720730662U CN207034456U CN 207034456 U CN207034456 U CN 207034456U CN 201720730662 U CN201720730662 U CN 201720730662U CN 207034456 U CN207034456 U CN 207034456U
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- holder
- steel
- plastics composite
- pipe
- under control
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- 229920003023 plastic Polymers 0.000 title claims abstract description 117
- 239000004033 plastic Substances 0.000 title claims abstract description 117
- 239000002131 composite material Substances 0.000 title claims abstract description 72
- 238000003466 welding Methods 0.000 title claims abstract description 24
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 17
- 238000004513 sizing Methods 0.000 title description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 59
- 239000010959 steel Substances 0.000 claims abstract description 59
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005204 segregation Methods 0.000 abstract description 4
- 210000003739 neck Anatomy 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The utility model discloses reinforcing device of being shaped at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, including the holder one and holder two being arranged oppositely, one end of holder one and one end of holder two are articulated and connected, the other end of holder one is fixedly installed at least one neck, holder two is provided with hinged groove in the position of corresponding neck, bolt is hingedly connected with by jointed shaft in hinged groove, location nut is connected with bolt, the region that holder one and holder two are inwardly formed is included positioned at the pipe joint area at middle part and positioned at the steel plastic compount area under control of both sides, pipe joint is straight connector, union elbow, tee pipe coupling, one kind in four-way union.The utility model is simple in construction, reasonable in design, can increase steel-plastics composite pipe junction density, prevents plastic layer and steel pipe layer segregation phenomenon, extends steel-plastics composite pipe service life.
Description
Technical field
Steel-plastics composite pipe technical field is the utility model is related to, is determined at specifically a kind of steel-plastics composite pipe electromagnetism joint made by flame welding
Type reinforcing device.
Background technology
Because steel skeleton steel-plastics composite pipe not only has, in light weight, intensity is good, resistance to acids and bases is strong, and has service life
It is long, it is safe and reliable the characteristics of, therefore, oil transportation in oil field, in the construction of gas transmission line, and Urban Underground water supply line, supply
In the construction of construction, the transformation of gas pipeline, the pipeline of steel moulding material is employed mostly, to reach corrosion-resistant purpose.But for length
Apart from the laying of pipeline, it is necessary to two pipelines are welded, and facilitate pipeline construction, the effect such as convenient maintenance assembly and disassembly,
With regard to needing to carry out reliable connection transition and conversion between two steel-plastics composite pipes, i.e., pipeline is connected between steel-plastics composite pipe and connect
Head, the external diameter of pipe joint and the interior warp of steel-plastics composite pipe are consistent, are then bonded together by welding technique.Conventional pipeline
Welding technique between joint and steel-plastics composite pipe is electromagnetism melting welding, but often due to the high temperature of welding process and damage steelplastic pipe
The plastic layer (typically be mostly vinyl material) of liner, there is the plastic layer in joint steel-plastics composite pipe to separate with steel pipe layer
Phenomenon, the service life of steel-plastics composite pipe is influenceed, while there is also the safety problem such as leakage at pipe joint.
Therefore, construction and the laying project of long range composite metal plastic pipe to be solved, must just solve how to protect steel to mould
The plastic layer material of liner the problem of high temperature failure by, it is necessary to invent a kind of simple in construction, reasonable in design, not increasing steel in pipe
Plastic composite junction density, plastic layer and steel pipe layer segregation phenomenon are prevented, extend the steel of steel-plastics composite pipe service life
Sizing reinforcing device at plastic composite electromagnetism joint made by flame welding.
Utility model content
The purpose of this utility model is to provide sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, to solve
The problem of being proposed in above-mentioned background technology.
To achieve the above object, the utility model provides following technical scheme：
Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, including the holder one and holder being arranged oppositely
Two, one end and one end of holder two of described holder one are articulated and connected, the other end of holder one be fixedly installed to
A few neck, holder two are provided with hinged groove in the position of corresponding neck, are hingedly connected with hinged groove by jointed shaft
Bolt, location nut is connected with bolt, and the region that holder one and holder two are inwardly formed is included in being located at
The pipe joint area in portion and positioned at the steel plastic compount area under control of both sides, the inner surface in pipe joint area and the outer surface phase of pipe joint
Coincide, the inner surface in steel plastic compount area under control matches with the outer surface of steel-plastics composite pipe, described pipe joint be straight connector,
One kind in union elbow, tee pipe coupling, four-way union.
The external diameter for two steel-plastics composite pipes that two described steel plastic compount areas under control clamp respectively is identical or different.
Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, including the holder one and holder being arranged oppositely
Two, one end and one end of holder two of described holder one are articulated and connected, the other end of holder one be fixedly installed to
A few neck, holder two are provided with hinged groove in the position of corresponding neck, are hingedly connected with hinged groove by jointed shaft
Bolt, location nut is connected with bolt, and the region that holder one and holder two are inwardly formed is included positioned at pipe
Road connector area and steel plastic compount area under control, the inner surface in pipe joint area match with the outer surface of pipe joint, steel-plastics composite pipe
The inner surface in area matches with the outer surface of steel-plastics composite pipe, and described pipe joint is straight connector.
Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, including the holder one and holder being arranged oppositely
Two, one end and one end of holder two of described holder one are articulated and connected, the other end of holder one be fixedly installed to
A few neck, holder two are provided with hinged groove in the position of corresponding neck, are hingedly connected with hinged groove by jointed shaft
Bolt, location nut is connected with bolt, the region that holder one and holder two are inwardly formed is steel plastic compount
Area under control, the inner surface in steel plastic compount area under control match with the outer surface of steel-plastics composite pipe.
The width of described neck is more than the external profile diameter of bolt and less than the external profile diameter of location nut.
Compared with prior art, the beneficial effects of the utility model are：The utility model is used for steel-plastics composite pipe and pipeline
Joint is in the process of electromagnetic welding postwelding, the place progress pressure clamping being connected to steel-plastics composite pipe with pipe joint, in waste heat
In the presence of increase be connected the density in place, and then prevent plastic layer and steel pipe layer segregation phenomenon, extend
Steel-plastics composite pipe service life, the utility model is simple in construction, reasonable in design, applied widely, is applicable different pipe joints
, can by the setting of bolt and location nut and the diameter of the steel-plastics composite pipe at pipe joint both ends can also be different
Simple adjustment holder one and holder two and the gap in junction place, grip to junction so as to realize, have
The advantages of firm grip, clamping force balanced, easy to use.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment one of the present utility model.
Fig. 2 is the structural representation of embodiment two of the present utility model.
Fig. 3 is the structural representation of embodiment three of the present utility model.
Fig. 4 is the structural representation of example IV of the present utility model.
Fig. 5 is the structural representation of embodiment five of the present utility model.
Fig. 6 is the structural representation of embodiment six of the present utility model.
Fig. 7 is the structural representation of embodiment seven of the present utility model.
Fig. 8 is the structural representation of embodiment eight of the present utility model.
In accompanying drawing：1. holder one, 2. holders two, 3. necks, 4. hinged grooves, 5. jointed shafts, 6. bolts, 7. are determined
Position nut, 8. pipe joint areas, 9. steel plastic compount areas under control.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in Fig. 1,2,3,4,5,6,7,8, the utility model includes sizing at steel-plastics composite pipe electromagnetism joint made by flame welding and added
Gu device, including the holder 1 and holder 22 being arranged oppositely, one end and one end of holder 22 of holder 1 are hinged
Connection, the other end of holder 1 are fixedly installed at least one neck 3, and holder 22 is set in the position of corresponding neck 3
There is hinged groove 4, hinged groove 4 is interior to be hingedly connected with bolt 6 by jointed shaft 5, and location nut 7 is connected with bolt 6,
The steel modeling that the region that holder 1 and holder 22 are inwardly formed is included positioned at the pipe joint area 8 at middle part and positioned at both sides is multiple
Area under control 9 is closed, the inner surface in pipe joint area 8 matches with the outer surface of pipe joint, the inner surface and steel in steel plastic compount area under control 9
The outer surface of plastic composite matches, and described pipe joint is straight connector, union elbow, tee pipe coupling, four-way pipe connector
One kind in head.
The external diameter for two steel-plastics composite pipes that two steel plastic compount areas under control 9 clamp respectively is identical or different.
Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, including the holder 1 being arranged oppositely and clamping
Part 22, one end and one end of holder 22 of holder 1 are articulated and connected, the other end of holder 1 be fixedly installed to
A few neck 3, holder 22 are provided with hinged groove 4 in the position of corresponding neck 3, are hinged in hinged groove 4 by jointed shaft 5
Bolt 6 is connected with, location nut 7, the region that holder 1 and holder 22 are inwardly formed are connected with bolt 6
Including positioned at pipe joint area 8 and steel plastic compount area under control 9, the inner surface in pipe joint area 8 and the outer surface kissing of pipe joint
Close, the inner surface in steel plastic compount area under control 9 matches with the outer surface of steel-plastics composite pipe, and pipe joint is straight connector.
Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, including the holder 1 being arranged oppositely and clamping
Part 22, one end and one end of holder 22 of holder 1 are articulated and connected, the other end of holder 1 be fixedly installed to
A few neck 3, holder 22 are provided with hinged groove 4 in the position of corresponding neck 3, are hinged in hinged groove 4 by jointed shaft 5
Bolt 6 is connected with, location nut 7, the region that holder 1 and holder 22 are inwardly formed are connected with bolt 6
For steel plastic compount area under control 9, the inner surface in steel plastic compount area under control 9 matches with the outer surface of steel-plastics composite pipe.
The width of neck 3 is more than the external profile diameter of bolt 6 and less than the external profile diameter of location nut 7.
The utility model is used for the process of steel-plastics composite pipe and pipe joint in electromagnetic welding postwelding, to steel-plastics composite pipe and pipe
The place that road joint is connected carries out pressure clamping, increases the density in the place that is connected in the presence of waste heat, and then prevents out
Plastic layer and steel pipe layer segregation phenomenon are now prevented, extends steel-plastics composite pipe service life, the utility model is simple in construction, sets
Meter is reasonable, and applied widely, the diameter for being applicable the steel-plastics composite pipe at different pipe joints and pipe joint both ends can also
Difference, by the setting of bolt 6 and location nut 7 can simple adjustment holder 1 and holder 22 with junction
The gap of side, is gripped so as to realize to junction, has the advantages of firm grip, clamping force is balanced, easy to use.
The region that holder 1 and holder 22 are inwardly formed in embodiment one is steel plastic compount area under control 9, steel plastic compount
The inner surface in area under control 9 matches with the outer surface of steel-plastics composite pipe, and the embodiment does not need pipe joint, directly acts on two
External diameter identical steel-plastics composite pipe, two steel-plastics composite pipes are heated by electromagnetism welding technology first, then added this
Fast device acts on the junction of two steel-plastics composite pipes, realizes fusion process.
The region that holder 1 and holder 22 are inwardly formed in embodiment two includes moulding positioned at pipe joint area 8 and steel
Compound area under control 9, the inner surface in pipe joint area 8 match with the outer surface of pipe joint, the inner surface in steel plastic compount area under control 9 with
The outer surface of steel-plastics composite pipe matches, and pipe joint is straight connector, and the embodiment is used to only mould again pipe joint and steel
Close one end of pipe contact.
The region that holder 1 and holder 22 are inwardly formed in embodiment three is included positioned at the pipe joint area 8 at middle part
Matched with positioned at the steel plastic compount area under control 9 of both sides, the inner surface in pipe joint area 8 with the outer surface of pipe joint, steel modeling is multiple
The inner surface for closing area under control 9 matches with the outer surface of steel-plastics composite pipe, and pipe joint is straight connector, and the embodiment is used for straight tube
The both ends of joint are interior to be arranged with steel-plastics composite pipe, and the external diameter of two steel-plastics composite pipes at both ends is different.
The region that holder 1 and holder 22 are inwardly formed in example IV is included positioned at the pipe joint area 8 at middle part
Matched with positioned at the steel plastic compount area under control 9 of both sides, the inner surface in pipe joint area 8 with the outer surface of pipe joint, steel modeling is multiple
The inner surface for closing area under control 9 matches with the outer surface of steel-plastics composite pipe, and pipe joint is union elbow, in the both ends of union elbow
The external diameter for two steel-plastics composite pipes being arranged is identical.
The region that holder 1 and holder 22 are inwardly formed in embodiment five is included positioned at the pipe joint area 8 at middle part
Matched with positioned at the steel plastic compount area under control 9 of both sides, the inner surface in pipe joint area 8 with the outer surface of pipe joint, steel modeling is multiple
The inner surface for closing area under control 9 matches with the outer surface of steel-plastics composite pipe, and pipe joint is union elbow, in the both ends of union elbow
The external diameter for two steel-plastics composite pipes being arranged is different.
The region that holder 1 and holder 22 are inwardly formed in embodiment six is included positioned at the pipe joint area 8 at middle part
Matched with positioned at the steel plastic compount area under control 9 of both sides, the inner surface in pipe joint area 8 with the outer surface of pipe joint, steel modeling is multiple
The inner surface for closing area under control 9 matches with the outer surface of steel-plastics composite pipe, the region that holder 1 and holder 22 are inwardly formed
Also include positioned at the steel plastic compount area under control 9 in the front of pipe joint area 8, the quantity in steel plastic compount area under control 9 is three, and pipe joint is
Tee pipe coupling, the external diameter for three steel-plastics composite pipes that three steel plastic compount areas under control 9 clamp respectively are identical.
The region that holder 1 and holder 22 are inwardly formed in embodiment seven is included positioned at the pipe joint area 8 at middle part
Matched with positioned at the steel plastic compount area under control 9 of both sides, the inner surface in pipe joint area 8 with the outer surface of pipe joint, steel modeling is multiple
The inner surface for closing area under control 9 matches with the outer surface of steel-plastics composite pipe, the region that holder 1 and holder 22 are inwardly formed
Also include positioned at the steel plastic compount area under control 9 in the front of pipe joint area 8, the quantity in steel plastic compount area under control 9 is three, and pipe joint is
Tee pipe coupling, the external diameter for three steel-plastics composite pipes that three steel plastic compount areas under control 9 clamp respectively are different.
The region that holder 1 and holder 22 are inwardly formed in embodiment eight is included positioned at the pipe joint area 8 at middle part
Matched with positioned at the steel plastic compount area under control 9 of both sides, the inner surface in pipe joint area 8 with the outer surface of pipe joint, steel modeling is multiple
The inner surface for closing area under control 9 matches with the outer surface of steel-plastics composite pipe, and pipe joint is four-way union, two steel-plastics composite pipes
The external diameter for two steel-plastics composite pipes that area 9 clamps respectively is identical.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (6)
1. reinforcing device of being shaped at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, it is characterised in that including the holder being arranged oppositely
One and holder two, one end and one end of holder two of described holder one be articulated and connected, the other end of holder one is consolidated
Surely at least one neck is provided with, holder two is provided with hinged groove in the position of corresponding neck, passes through jointed shaft in hinged groove
Bolt is hingedly connected with, location nut, the region that holder one and holder two are inwardly formed are connected with bolt
Including positioned at the pipe joint area at middle part and positioned at the steel plastic compount area under control of both sides, the inner surface in pipe joint area and pipe joint
Outer surface match, the inner surface in steel plastic compount area under control matches with the outer surface of steel-plastics composite pipe, described pipe joint
For one kind in straight connector, union elbow, four-way union.
2. reinforcing device of being shaped at steel-plastics composite pipe electromagnetism joint made by flame welding according to claim 1, it is characterised in that described
The external diameter for two steel-plastics composite pipes that two steel plastic compount areas under control clamp respectively is identical or different.
3. reinforcing device of being shaped at steel-plastics composite pipe electromagnetism joint made by flame welding according to claim 1, it is characterised in that described
The region that holder one and holder two are inwardly formed also includes the steel plastic compount area under control in front of pipe joint area, and steel modeling is multiple
The quantity for closing area under control is three, and described pipe joint is tee pipe coupling, and described three steel plastic compount areas under control press from both sides respectively
The external diameter for three steel-plastics composite pipes held is identical or different.
4. reinforcing device of being shaped at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, it is characterised in that including the holder being arranged oppositely
One and holder two, one end and one end of holder two of described holder one be articulated and connected, the other end of holder one is consolidated
Surely at least one neck is provided with, holder two is provided with hinged groove in the position of corresponding neck, passes through jointed shaft in hinged groove
Bolt is hingedly connected with, location nut, the region that holder one and holder two are inwardly formed are connected with bolt
Including being matched positioned at pipe joint area and steel plastic compount area under control, the inner surface in pipe joint area with the outer surface of pipe joint,
The inner surface in steel plastic compount area under control matches with the outer surface of steel-plastics composite pipe, and described pipe joint is straight connector.
5. reinforcing device of being shaped at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding, it is characterised in that including the holder being arranged oppositely
One and holder two, one end and one end of holder two of described holder one be articulated and connected, the other end of holder one is consolidated
Surely at least one neck is provided with, holder two is provided with hinged groove in the position of corresponding neck, passes through jointed shaft in hinged groove
Bolt is hingedly connected with, location nut, the region that holder one and holder two are inwardly formed are connected with bolt
For steel plastic compount area under control, the inner surface in steel plastic compount area under control matches with the outer surface of steel-plastics composite pipe.
6. reinforcing device of being shaped at the steel-plastics composite pipe electromagnetism joint made by flame welding according to claim 1 or 4 or 5, it is characterised in that
The width of described neck is more than the external profile diameter of bolt and less than the external profile diameter of location nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720730662.3U CN207034456U (en) | 2017-06-13 | 2017-06-13 | Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720730662.3U CN207034456U (en) | 2017-06-13 | 2017-06-13 | Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207034456U true CN207034456U (en) | 2018-02-23 |
Family
ID=61468869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720730662.3U Expired - Fee Related CN207034456U (en) | 2017-06-13 | 2017-06-13 | Sizing reinforcing device at a kind of steel-plastics composite pipe electromagnetism joint made by flame welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207034456U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067905A (en) * | 2019-05-30 | 2019-07-30 | 山东亿佰通机械股份有限公司 | Threeway clip and connector with the clip connect prefabricated component |
| CN110440068A (en) * | 2019-09-02 | 2019-11-12 | 淄博爱科工矿机械有限公司 | A kind of adjustable clip |
| CN112032472A (en) * | 2020-09-14 | 2020-12-04 | 重庆市钧杰浩石油设备有限公司 | Anti-shearing protective sleeve for connecting part of steel-plastic conversion pipe fitting |
-
2017
- 2017-06-13 CN CN201720730662.3U patent/CN207034456U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067905A (en) * | 2019-05-30 | 2019-07-30 | 山东亿佰通机械股份有限公司 | Threeway clip and connector with the clip connect prefabricated component |
| CN110067905B (en) * | 2019-05-30 | 2023-12-08 | 山东亿佰通机械股份有限公司 | Tee joint clamp and joint connection prefabricated part with same |
| CN110440068A (en) * | 2019-09-02 | 2019-11-12 | 淄博爱科工矿机械有限公司 | A kind of adjustable clip |
| CN110440068B (en) * | 2019-09-02 | 2021-02-05 | 淄博爱科工矿机械有限公司 | Adjustable hoop |
| CN112032472A (en) * | 2020-09-14 | 2020-12-04 | 重庆市钧杰浩石油设备有限公司 | Anti-shearing protective sleeve for connecting part of steel-plastic conversion pipe fitting |
| CN112032472B (en) * | 2020-09-14 | 2022-04-05 | 重庆市钧杰浩石油设备有限公司 | Anti-shearing protective sleeve for connecting part of steel-plastic conversion pipe fitting |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 Termination date: 20200613 |
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| CF01 | Termination of patent right due to non-payment of annual fee |