CN212377772U - Petroleum long-distance pipeline adds medicine pour point depression device - Google Patents
Petroleum long-distance pipeline adds medicine pour point depression device Download PDFInfo
- Publication number
- CN212377772U CN212377772U CN202020396269.7U CN202020396269U CN212377772U CN 212377772 U CN212377772 U CN 212377772U CN 202020396269 U CN202020396269 U CN 202020396269U CN 212377772 U CN212377772 U CN 212377772U
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- Prior art keywords
- pipe
- petroleum
- pour point
- medicine
- mixing
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- 239000003208 petroleum Substances 0.000 title claims abstract description 73
- 239000003814 drug Substances 0.000 title claims abstract description 48
- 230000000994 depressogenic effect Effects 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000013329 compounding Methods 0.000 claims description 8
- 230000000881 depressing effect Effects 0.000 claims description 7
- 239000000575 pesticide Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000003756 stirring Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000010724 circulating oil Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a long oil pipeline adds medicine pour point depressant device in the technical field of oil transportation, which comprises a bottom plate, the middle position of the top of the bottom plate is provided with a medicine mixing pipe, both ends of the medicine mixing pipe are communicated with an oil pipe, the oil pipe is fixedly connected with the bottom plate through a fixing seat, the rear side of the top of the bottom plate is fixedly provided with a heater, the front side of the top is fixedly provided with a mixing box, the medicine mixing pipe comprises a pipe body, the inside of the pipe body is provided with a heating cavity, the left side and the right side of the top of the pipe body are respectively communicated with a liquid inlet pipe and a liquid outlet pipe which are communicated with the heating cavity, the axle wire position of the inner cavity of the pipe body is provided with an inner pipe, both ends of the inner pipe are communicated with the heating cavity through a connecting pipe, the long oil pipeline adds the pour point depressant device, the structure is simple, the design is reasonable, the pour, is beneficial to the transportation of petroleum in long-distance pipelines.
Description
Technical Field
The utility model relates to an oil transportation technical field specifically is a long-distance pipeline of oil adds medicine pour point depressant device.
Background
The oil pipeline system, i.e. the pipeline system for transporting petroleum and petroleum products, is mainly composed of oil pipeline, oil transportation station and other auxiliary related equipments, is one of the main equipments in petroleum storage and transportation industry, and is also the most main transportation equipment for crude oil and petroleum products. The pipes of oil pipelines are generally steel pipes, and are connected into long-distance pipelines by welding, flanges and other connecting devices, and valves are used for opening and closing control and flow regulation. The oil pipeline mainly comprises conveying processes such as isothermal conveying, heating conveying, sequential conveying and the like.
In the Chinese utility model patent with the publication number of CN205859614U and the publication date of 2017-01-04, the utility model discloses a chemical feeding and pour point depressing device for petroleum long-distance pipeline, which comprises a flow meter, a heating device, a pour point depressant dissolving device and a metering pump which are connected in sequence, the utility model discloses a device which is connected with the petroleum long-distance pipeline and introduces part of crude oil in the pipeline into the pour point depressant dissolving device of the utility model, heats the crude oil by the heating device, so that the pour point depressant is completely dissolved in the crude oil, in addition, the mixing proportion is accurately controlled according to the flow meter and the metering pump, finally the mixed crude oil is returned to the petroleum long-distance pipeline, thereby the freezing point of the crude oil in the petroleum long-distance pipeline and the lowest start transportation amount of the petroleum long-distance pipeline are both reduced, the petroleum long-distance pipeline is still kept normal and stable transportation under the low transportation amount, and the operation cost and the pipeline energy consumption are both, the heating is avoided from damaging the petroleum long-distance pipeline, and the service life of the petroleum long-distance pipeline is ensured.
Above-mentioned long pipeline of oil adds medicine pour point depressant device with partial petroleum from the trunk line midstream, dissolve the pour point depressant through the heating again, flow back to the trunk line in the end, but can lead to the partial petroleum that thoughtlessly has the pour point depressant like this and can't with the petroleum intensive mixing in the trunk line, lead to the holistic pour point depressant effect of petroleum relatively poor, be unfavorable for the petroleum and transport in long pipeline.
Based on this, the utility model relates to a specifically be a petroleum long distance pipeline adds medicine pour point depressant device to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a long pipeline of oil adds medicine pour point depressant device to solve the long pipeline of traditional oil that proposes in the above-mentioned background art and add medicine pour point depressant device and divide partial oil from the trunk line and flow out, dissolve the pour point depressant through the heating again, flow back to the trunk line in at last, can lead to so thoughtlessly having the petroleum intensive mixing in the partial oil of pour point depressant can't and the trunk line, lead to the holistic relatively poor problem of pour point depressant effect of oil.
In order to achieve the above object, the utility model provides a following technical scheme: a dosing and pour point depressing device for a long petroleum pipeline comprises a bottom plate, wherein a pesticide mixing pipe is arranged in the middle of the top of the bottom plate, two ends of the pesticide mixing pipe are communicated with petroleum pipes, the petroleum pipes are fixedly connected with the bottom plate through a fixed seat, a heater is fixedly arranged on the rear side of the top of the bottom plate, and a material mixing box is fixedly arranged on the front side of the top of the bottom plate;
the medicine mixing pipe comprises a pipe body, a heating cavity is arranged in the pipe body, the left side and the right side of the top of the pipe body are respectively communicated with a liquid inlet pipe and a liquid outlet pipe which are communicated with the heating cavity, an inner pipe is arranged in the central axis position of the inner cavity of the pipe body, the two ends of the inner pipe are both communicated with the heating cavity through connecting pipes, a medicine mixing cavity is formed between the inner wall of the pipe body and the surface of the inner pipe, a medicine adding pipe communicated with the medicine mixing cavity is fixedly penetrated in the middle of the pipe body, and a first spiral blade positioned on the left side of the medicine adding pipe and a second spiral blade positioned on the right side of the medicine;
the left side fixed mounting at heater top has the second liquid pump, the input and the heater intercommunication of second liquid pump, output and through second communicating pipe and feed liquor pipe intercommunication, go out the liquid pipe and communicate through the third right-hand member with the heater, the top fixed mounting of compounding case has first liquid pump, the input of first liquid pump runs through to the bottom of compounding incasement chamber, output through first communicating pipe and add the pencil intercommunication.
The utility model discloses as above oil long distance pipeline adds medicine pour point depression device, it is further, the second spiral leaf includes two spiral sections, and the rotation of two spiral sections is to opposite.
The utility model discloses as above oil long distance pipeline adds medicine pour point depression device, it is further, the mixing box is horizontal cylindric, the upside intercommunication of mixing box has the feed inlet, be provided with rabbling mechanism on the mixing box.
The utility model discloses as above oil long distance pipeline adds medicine pour point depression device, it is further, the rabbling mechanism includes the driving motor of fixed mounting in compounding case side center department, driving motor's output shaft runs through to the inner chamber of compounding case and fixedly connected with and compounding case rotate the axis of rotation of being connected, the even fixedly connected with puddler in surface of axis of rotation.
The utility model discloses as above oil long distance pipeline adds medicine pour point depression device, it is further, the both ends of mixing the pencil all through the flange respectively with two petroleum pipe fixed connection.
The utility model discloses as above oil long distance pipeline adds medicine pour point depression device, it is further, the fixing base is including fixing the solid fixed ring on petroleum pipe surface, solid fixed ring's bottom fixedly connected with connecting plate, the bottom of connecting plate and the top fixed connection of bottom plate.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses cut the installation in the middle part of petroleum pipeline and mix the pencil, through adding the pencil and lasting adding medicine to the oil that flows, when oil passes through first spiral leaf, oil stirs along first spiral leaf, and then is in the hot water or the hot oil of first spiral leaf position heating chamber and interior pipe and preheats the oil of this department; when the petroleum passes through the dosing pipe, the pour point depressant is added into the petroleum; when the pour point depressant and the petroleum pass through the second spiral blade, the pour point depressant and the petroleum are turned along the second spiral blade, so that the pour point depressant and the petroleum are fully mixed on one hand, and the hot water or the hot oil in the heating cavity and the inner tube is more favorable for heating the pour point depressant and the petroleum on the other hand, and the mixing effect of the pour point depressant and the petroleum is improved;
the pour point depressant and the petroleum can be heated from the inner side and the outer side when hot water or hot oil flows in the mixing pipe, so that the heating efficiency is higher, and the pour point depressant and the petroleum can be conveniently mixed; in addition, the left side and the right side of the dosing pipe are respectively provided with a first spiral blade and a second spiral blade, the petroleum is turned by the first spiral blade so as to be beneficial to preheating the petroleum, and the pour point depressant and the petroleum are turned together by the second spiral blade so as to be more beneficial to mixing the pour point depressant and the petroleum;
this long pipeline of oil adds medicine pour point depressant device, simple structure, reasonable in design, the petroleum to in the petroleum pipeline that can last adds the pour point depressant, and the mixing effect of petroleum and pour point depressant is good, and then improves the holistic pour point depressant effect of petroleum, is favorable to the petroleum to transport in long pipeline.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic perspective view of the structure of the present invention;
fig. 2 is a schematic sectional view of the mixing tube of the present invention;
FIG. 3 is a front view of the local structure of the mixing tube of the present invention;
FIG. 4 is a schematic sectional view of the mixing box of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-bottom plate, 2-medicine mixing pipe, 201-heating chamber, 202-medicine mixing chamber, 21-pipe body, 22-liquid outlet pipe, 23-liquid inlet pipe, 24-inner pipe, 25-connecting pipe, 26-medicine adding pipe, 27-first spiral blade, 28-second spiral blade, 3-petroleum pipe, 4-fixed seat, 5-material mixing box, 51-feed inlet, 6-first liquid pump, 7-first connecting pipe, 8-second liquid pump, 9-second connecting pipe, 10-third connecting pipe, 11-stirring mechanism, 111-driving motor, 112-rotating shaft, 113-stirring rod and 12-heater.
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. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a long oil pipeline adds medicine pour point depression device, comprising a base plate 1, the intermediate position at bottom plate 1 top is provided with medicine mixing pipe 2, the both ends of medicine mixing pipe 2 all have petroleum pipe 3 through the flange intercommunication, petroleum pipe 3 is through fixing base 4 and bottom plate 1 fixed connection, the rear side fixed mounting at bottom plate 1 top has heater 12, the front side fixed mounting at top has mixing box 5, wherein, fixing base 4 includes the solid fixed ring of fixing on petroleum pipe 3 surface, the bottom fixed connection of solid fixed ring has the connecting plate, the bottom of connecting plate and the top fixed connection of bottom plate 1, support fixing petroleum pipe 3 through fixing base 4, then utilize two petroleum pipes 3 to mix medicine pipe 2 and fix;
it should be noted that, the heater 12 adopts a flange heating pipe to heat the circulating water or circulating oil therein, which is well known in the art and therefore is not described in detail;
the medicine mixing tube 2 comprises a tube body 21, a heating cavity 201 is arranged in the tube body 21, the left side and the right side of the top of the tube body 21 are respectively communicated with a liquid inlet tube 23 and a liquid outlet tube 22 which are communicated with the heating cavity 201, an inner tube 24 is arranged in the central axis position of the inner cavity of the tube body 21, both ends of the inner tube 24 are communicated with the heating cavity 201 through a connecting tube 25, a medicine mixing cavity 202 is formed between the inner wall of the tube body 21 and the surface of the inner tube 24, a medicine feeding tube 26 communicated with the medicine mixing cavity 202 is fixedly penetrated in the middle of the tube body 21, a first spiral blade 27 positioned on the left side of the medicine feeding tube 26 and a second spiral blade 28 positioned on the right side of the medicine feeding tube 26 are fixedly connected to the surface of the inner tube 24, wherein the second spiral blade 28 comprises two spiral sections, the spiral directions of the two spiral sections are opposite, and the second spiral blade 28 is arranged into two spiral sections with opposite spiral, further, turbulence is generated when the petroleum and the pour point depressant are mixed and flow, so that the petroleum and the pour point depressant are mixed more uniformly, the petroleum and the pour point depressant are heated by hot water or hot oil in the heating cavity 201 and the inner pipe 24, and the mixing effect of the petroleum and the pour point depressant is further improved;
a second liquid pump 8 is fixedly installed on the left side of the top of the heater 12, the input end of the second liquid pump 8 is communicated with the heater 12, the output end of the second liquid pump 8 is communicated with a liquid inlet pipe 23 through a second communicating pipe 9, a liquid outlet pipe 22 is communicated with the right end of the heater 12 through a third communicating pipe 10, a first liquid pump 6 is fixedly installed on the top of the mixing box 5, the input end of the first liquid pump 6 penetrates to the bottom of the inner cavity of the mixing box 5, and the output end of the first liquid pump is communicated with a chemical feeding pipe 26 through a first;
wherein, mixing box 5 is horizontal cylindricly, mixing box 5's upside intercommunication has feed inlet 51, be provided with rabbling mechanism 11 on the mixing box 5, it is specific, rabbling mechanism 11 includes the driving motor 111 of fixed mounting in mixing box 5 side center department, driving motor 111's output shaft runs through to mixing box 5's inner chamber and fixedly connected with and mixing box 5 rotate the axis of rotation 112 of being connected, the even fixedly connected with puddler 113 in surface of axis of rotation 112, through the setting of rabbling mechanism 11, when lasting add medicine to mixing medicine pipe 2 in, utilize the abundant stirring of the pour point depressant of rabbling mechanism 11 in to mixing box 5, make the component of pour point depressant more even.
One specific application of this embodiment is: petroleum is conveyed from left to right in the pesticide mixing pipe 2 and the petroleum pipe 3, when the petroleum mixer works, the fixed seat 4, the first liquid pump 6, the second liquid pump 8 and the stirring mechanism 11 are started, the heater 12 heats circulating water or circulating oil in the heater 12, hot water or hot oil in the heater 12 can be pumped out by the second liquid pump 8, the hot water or the hot oil is guided into the heating cavity 201 and the inner pipe 24 through the second communicating pipe 9 and the liquid inlet pipe 23, and then the hot water or the hot oil flows back into the heater 12 from the liquid outlet pipe 22 and the third communicating pipe 10; pour point depressant is added into the mixing box 5 through the feed inlet 51, the output shaft of the stirring mechanism 11 drives the rotating shaft 112 to rotate, the rotating shaft 112 drives the stirring rod 113 to stir the pour point depressant in the mixing box 5, the components of the pour point depressant are ensured to be uniform, the pour point depressant in the mixing box 5 is pumped out by the first liquid pump 6 and is added into the medicine mixing cavity 202 through the first communication pipe 7 and the medicine adding pipe 26;
when the oil passes through the first spiral blade 27, the oil turns along the first spiral blade 27, and the hot water or the hot oil in the heating cavity 201 and the inner pipe 24 at the position of the first spiral blade 27 preheats the oil at the position; when the petroleum passes through the dosing pipe 26, the pour point depressant is added into the petroleum; when the pour point depressant and the petroleum pass through the second spiral blade 28, the pour point depressant and the petroleum are turned over along the second spiral blade 28, so that the pour point depressant and the petroleum are fully mixed, and the hot water or the hot oil in the heating cavity 201 and the inner tube 24 can heat the pour point depressant and the petroleum, so that the mixing effect of the pour point depressant and the petroleum is improved.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a long-distance oil pipeline adds medicine pour point depressant device, includes bottom plate (1), its characterized in that: a pesticide mixing pipe (2) is arranged in the middle of the top of the bottom plate (1), two ends of the pesticide mixing pipe (2) are communicated with petroleum pipes (3), the petroleum pipes (3) are fixedly connected with the bottom plate (1) through fixing seats (4), a heater (12) is fixedly installed on the rear side of the top of the bottom plate (1), and a pesticide mixing box (5) is fixedly installed on the front side of the top;
the medicine mixing pipe (2) comprises a pipe body (21), a heating cavity (201) is formed in the pipe body (21), the left side and the right side of the top of the pipe body (21) are respectively communicated with a liquid inlet pipe (23) and a liquid outlet pipe (22) which are communicated with the heating cavity (201), an inner pipe (24) is arranged at the axis position of the inner cavity of the pipe body (21), two ends of the inner pipe (24) are communicated with the heating cavity (201) through connecting pipes (25), a medicine mixing cavity (202) is formed between the inner wall of the pipe body (21) and the surface of the inner pipe (24), a medicine adding pipe (26) communicated with the medicine mixing cavity (202) is fixedly arranged in the middle of the pipe body (21) in a penetrating mode, and the surface of the inner pipe (24) is fixedly connected with a first spiral blade (27) located on the left side of the medicine adding pipe (26) and a second spiral blade (28;
the left side fixed mounting at heater (12) top has second liquid pump (8), the input and heater (12) intercommunication, the output of second liquid pump (8) and through second communicating pipe (9) and feed liquor pipe (23) intercommunication, drain pipe (22) are through the third communicating pipe (10) and the right-hand member intercommunication of heater (12), the top fixed mounting of mixing box (5) has first liquid pump (6), the input of first liquid pump (6) runs through to bottom, the output of mixing box (5) inner chamber through first communicating pipe (7) and add pencil (26) intercommunication.
2. The petroleum long-distance pipeline dosing and pour point depressing device according to claim 1 is characterized in that: the second helical blade (28) comprises two helical sections, and the rotation directions of the two helical sections are opposite.
3. The petroleum long-distance pipeline dosing and pour point depressing device according to claim 2 is characterized in that: mixing box (5) are horizontal cylindric, the upside intercommunication of mixing box (5) has feed inlet (51), be provided with rabbling mechanism (11) on mixing box (5).
4. The petroleum long-distance pipeline dosing and pour point depressing device according to claim 3 is characterized in that: rabbling mechanism (11) are including driving motor (111) of fixed mounting in compounding case (5) side center department, the output shaft of driving motor (111) runs through to the inner chamber of compounding case (5) and fixedly connected with and compounding case (5) rotation axis of rotation (112) of being connected, the even fixedly connected with puddler (113) in surface of axis of rotation (112).
5. The petroleum long-distance pipeline dosing and pour point depressing device according to claim 4 is characterized in that: and the two ends of the medicine mixing pipe (2) are respectively and fixedly connected with the two petroleum pipes (3) through flanges.
6. The petroleum long-distance pipeline dosing and pour point depressing device according to claim 5 is characterized in that: the fixing seat (4) comprises a fixing ring fixed on the surface of the petroleum pipe (3), the bottom of the fixing ring is fixedly connected with a connecting plate, and the bottom of the connecting plate is fixedly connected with the top of the bottom plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396269.7U CN212377772U (en) | 2020-03-25 | 2020-03-25 | Petroleum long-distance pipeline adds medicine pour point depression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396269.7U CN212377772U (en) | 2020-03-25 | 2020-03-25 | Petroleum long-distance pipeline adds medicine pour point depression device |
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| Publication Number | Publication Date |
|---|---|
| CN212377772U true CN212377772U (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020396269.7U Expired - Fee Related CN212377772U (en) | 2020-03-25 | 2020-03-25 | Petroleum long-distance pipeline adds medicine pour point depression device |
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| Country | Link |
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| CN (1) | CN212377772U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217821A (en) * | 2021-07-09 | 2021-08-06 | 南通宝田包装科技有限公司 | Liquid material conveying system for producing Chinese herbal medicine toothpaste |
| CN114791063A (en) * | 2022-04-08 | 2022-07-26 | 镇江裕太防爆电加热器有限公司 | High-safety heating device for flammable liquid conveying pipeline |
-
2020
- 2020-03-25 CN CN202020396269.7U patent/CN212377772U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217821A (en) * | 2021-07-09 | 2021-08-06 | 南通宝田包装科技有限公司 | Liquid material conveying system for producing Chinese herbal medicine toothpaste |
| CN114791063A (en) * | 2022-04-08 | 2022-07-26 | 镇江裕太防爆电加热器有限公司 | High-safety heating device for flammable liquid conveying pipeline |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210924 Address after: 841000 east of Jinhe road and north of Nanyuan Road, Korla economic and Technological Development Zone, Bayingolin Mongolian Autonomous Prefecture, Xinjiang Uygur Autonomous Region Patentee after: XINJIANG GANGTUO ENERGY TECHNOLOGY Co.,Ltd. Address before: 525349 No.2, liulijiu village, Beijie Town, Xinyi City, Maoming City, Guangdong Province Patentee before: Wei Zhiying |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |