CN204312467U - A kind of elevated vortex device being applicable to gas gathering pipeline - Google Patents
A kind of elevated vortex device being applicable to gas gathering pipeline Download PDFInfo
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- CN204312467U CN204312467U CN201420684171.6U CN201420684171U CN204312467U CN 204312467 U CN204312467 U CN 204312467U CN 201420684171 U CN201420684171 U CN 201420684171U CN 204312467 U CN204312467 U CN 204312467U
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- Prior art keywords
- pipeline
- vortex generator
- anger
- admission line
- elevated
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- 210000004907 gland Anatomy 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 abstract description 20
- 241000521257 Hydrops Species 0.000 abstract description 13
- 206010030113 Oedema Diseases 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model belongs to gas recovery technical field, be specifically related to a kind of elevated vortex device being applicable to gas gathering pipeline, comprise admission line, pipeline of giving vent to anger, the tube sheet that is symmetrically set in admission line and gives vent to anger between pipeline, admission line and give vent to anger between pipeline and be provided with vortex generator, the housing bottom of vortex generator is connected with straight length, vortex generator is all connected with sliding slot board with straight length two ends, and sliding slot board is connected with tube sheet, and tube sheet is all fixed with seal ring; The housing tip of vortex generator is connected with pull bar, and pull bar top is provided with handle; The housing of vortex generator is the circular tube shaped of both ends open, and the housing of vortex generator and the external diameter of straight length are all not more than the external diameter of admission line or pipeline of giving vent to anger.This elevated vortex device can effectively prevent rock gas from gathering line, producing hydrops, reduces line pressure loss, improves pipeline transfer efficiency, reduces the pipeline pigging frequency, reduces the security risk brought by pigging operation.
Description
Technical field
The utility model belongs to gas recovery technical field, is specifically related to a kind of elevated vortex device being applicable to gas gathering pipeline.
Background technique
Rock gas is in course of conveying, and because pipeline rises and falls so there is low spot hydrops situation all the time, along with the prolongation of working time, hydrops gets more and more, and the effective drift diameter of pipeline is diminished, and line pressure reduces, thus causes transfer efficiency to reduce.
In order to clear out pipeline hydrops, improve pipeline transfer efficiency, the effective measures adopted at present carry out logical ball pigging to pipeline, and logical ball pigging such as card ball just exists certain security risk, the pipeline pigging frequency comparatively serious for hydrops is higher, and therefore risk is also just larger.
Model utility content
The purpose of this utility model overcomes gathering line low spot hydrops problem, reduces line pressure loss, improves pipeline transfer efficiency.
For this reason, the utility model provides a kind of elevated vortex device being applicable to gas gathering pipeline, comprise admission line, pipeline of giving vent to anger, the tube sheet that is symmetrically set in admission line and gives vent to anger between pipeline, described admission line and give vent to anger between pipeline and be provided with vortex generator, the housing bottom of described vortex generator is connected with straight length, described vortex generator is all connected with sliding slot board with straight length two ends, and sliding slot board is connected with tube sheet, and described tube sheet is all fixed with seal ring;
The housing tip of described vortex generator is connected with pull bar, and pull bar top is provided with handle;
The housing of described vortex generator is the circular tube shaped of both ends open, and the housing of described vortex generator and the external diameter of straight length are all not more than the external diameter of admission line or pipeline of giving vent to anger.
Described vortex generator and straight length outside are provided with lower valve body, and described admission line and pipeline of giving vent to anger are through lower valve body, and the upper end of described lower valve body is provided with bonnet, and described handle is through bonnet.
Described bonnet vertical direction runs through and is provided with screw thread, and described pull bar is screw rod, and screw rod is threaded with bonnet through bonnet, and described handle is handwheel.
Described bonnet center is provided with the loading pipe through bonnet, fills up stuffing box packing in described loading pipe, and the upper and lower end of loading pipe is equipped with sealing gland, and described handle is through loading pipe.
Described sealing gland is equipped with screw thread, and described pull bar is screw rod, and screw rod is threaded with sealing gland through sealing gland, and described handle is handwheel.
Described vortex generator is turbine.
The housing outer diameter of described vortex generator equals admission line or the external diameter of pipeline of giving vent to anger.
The external diameter of described straight length equals admission line or the external diameter of pipeline of giving vent to anger.
The housing of described vortex generator welds with straight length.
The beneficial effects of the utility model are: this elevated vortex device being applicable to gas gathering pipeline that the utility model provides can effectively prevent rock gas from gathering line, producing hydrops, reduce line pressure loss, improve pipeline transfer efficiency, reduce the pipeline pigging frequency, reduce the security risk brought by pigging operation.
Be described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is sectional arrangement drawing of the present utility model;
Fig. 2 is the inner chamber plan view of Fig. 1;
Fig. 3 is the AB direction view of Fig. 1.
In figure: 1, bonnet; 2, lower valve body; 3, admission line; 4. to give vent to anger pipeline; 5, handwheel; 6, screw rod; 7, sealing gland; 8, loading pipe; 9, stuffing box packing; 10, vortex generator; 11, straight length; 12, sliding slot board; 13, tube sheet.
Embodiment
Embodiment 1:
In order to solve gathering line low spot hydrops problem, reduce line pressure loss, improve pipeline transfer efficiency, the present embodiment provides a kind of elevated vortex device being applicable to gas gathering pipeline, comprise admission line 3, to give vent to anger pipeline 4, the tube sheet 13 being symmetrically set in admission line 3 and giving vent to anger between pipeline 4, admission line 3 and give vent to anger between pipeline 4 and be provided with vortex generator 10, the housing bottom of vortex generator 10 is connected with straight length 11, vortex generator 10 is all connected with sliding slot board 12 with straight length 11 two ends, sliding slot board 12 is connected with tube sheet 13, tube sheet 13 is all fixed with seal ring, the housing tip of vortex generator 10 is connected with pull bar, and pull bar top is provided with handle, the housing of vortex generator 10 is the circular tube shaped of both ends open, and the housing of vortex generator 10 and the external diameter of straight length 11 are all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, and wherein, vortex generator 10 is turbine.
The working procedure of the elevated vortex device of the present embodiment, vortex generator 10 and straight length about 11 are connected between two pieces of sliding slot boards 12, and two pieces of sliding slot boards 12 are positioned over admission line 3 and give vent to anger between pipeline 4 between symmetrically arranged two tube sheets 13, during the elevated vortex device of normal use, vortex generator 10 is with admission line 3 and give vent to anger pipeline 4 tube sheet 13 just to level line, vortex generator 10 utilizes rock gas to drive, effectively prevent rock gas from gathering line, producing hydrops, reduce line pressure loss, improve pipeline transfer efficiency, reduce the pipeline pigging frequency, reduce the security risk brought by pigging operation.
When the logical ball pigging of needs, upwards carry handle, pull bar rises, because pull bar is connected to the housing tip of vortex generator 10, drive the housing of vortex generator 10, straight length 11 and sliding slot board 12 between two tube sheets 13 on move, until the two ends of straight length 11 and admission line 3 tube sheet 13 with give vent to anger pipeline 4 tube sheet 13 level connection joint, thus vortex generator 10 is replaced by straight length 11, like this, spherical pig just can pass through smoothly.
Due to tube sheet 13 being all fixed with seal ring, and the external diameter of the housing of vortex generator 10 and straight length 11 is all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, start to the two ends of straight length 11 and admission line 3 tube sheet 13 and pipeline 4 tube sheet 13 level connection joint of giving vent to anger so upwards carry, straight length 11 can firmly be stuck between two pieces of tube sheets 13, can not drop downwards, reduce labor intensity, the leakage of rock gas can be prevented simultaneously, after pigging, put down handle, pull bar is downward, vortex generator 10 recovers with admission line 3 and gives vent to anger pipeline 4 tube sheet 13 just to level line, vortex generator 10 puts back to normal pipeline position, gathering line can not be affected normally run.
Embodiment 2:
The present embodiment provides a kind of elevated vortex device being applicable to gas gathering pipeline, comprise admission line 3, pipeline 4 of giving vent to anger, the tube sheet 13 that is symmetrically set in admission line 3 and gives vent to anger between pipeline 4, admission line 3 and give vent to anger between pipeline 4 and be provided with vortex generator 10, the housing bottom of vortex generator 10 is connected with straight length 11, vortex generator 10 and straight length 11 outside are provided with lower valve body 2, admission line 3 and pipeline 4 of giving vent to anger are through lower valve body 2, and the upper end of lower valve body 2 is provided with bonnet 1.
Vortex generator 10 is all connected with sliding slot board 12 with straight length 11 two ends, and sliding slot board 12 is connected with tube sheet 13, and tube sheet 13 is all fixed with seal ring; The housing tip of vortex generator 10 is connected with pull bar, and pull bar top is provided with handle, and handle is through bonnet 1; The housing of vortex generator 10 is the circular tube shaped of both ends open, and the housing of vortex generator 10 and the external diameter of straight length 11 are all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, and wherein, vortex generator 10 is turbine.
The working procedure of the elevated vortex device of the present embodiment: vortex generator 10 and straight length about 11 are connected between two pieces of sliding slot boards 12, and two pieces of sliding slot boards 12 are positioned over admission line 3 and give vent to anger between pipeline 4 between symmetrically arranged two tube sheets 13, during the elevated vortex device of normal use, vortex generator 10 is with admission line 3 and give vent to anger pipeline 4 tube sheet 13 just to level line, vortex generator 10 utilizes rock gas to drive, effectively prevent rock gas from gathering line, producing hydrops, reduce line pressure loss, improve pipeline transfer efficiency, reduce the pipeline pigging frequency, reduce the security risk brought by pigging operation.
When the logical ball pigging of needs, upwards carry handle, pull bar rises, because pull bar is connected to the housing tip of vortex generator 10, drive the housing of vortex generator 10, straight length 11 and sliding slot board 12 between two tube sheets 13 on move, until the two ends of straight length 11 and admission line 3 tube sheet 13 with give vent to anger pipeline 4 tube sheet 13 level connection joint, thus vortex generator 10 is replaced by straight length 11, like this, spherical pig just can pass through smoothly.
Due to tube sheet 13 being all fixed with seal ring, and the external diameter of the housing of vortex generator 10 and straight length 11 is all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, start to the two ends of straight length 11 and admission line 3 tube sheet 13 and pipeline 4 tube sheet 13 level connection joint of giving vent to anger so upwards carry, straight length 11 can firmly be stuck between two pieces of tube sheets 13, can not drop downwards, reduce labor intensity, the leakage of rock gas can be prevented simultaneously, simultaneously because vortex generator 10 and straight length 11 outside are provided with lower valve body 2, admission line 3 and pipeline 4 of giving vent to anger are through lower valve body 2, the upper end of lower valve body 2 is provided with bonnet 1, handle is through bonnet 1, following valve body 2, a confined space is formed between bonnet 1, prevent the leakage of rock gas further.
After pigging, put down handle, pull bar is downward, and vortex generator 10 recovers with admission line 3 and gives vent to anger pipeline 4 tube sheet 13 just to level line, and vortex generator 10 puts back to normal pipeline position, can not affect gathering line and normally run.
Embodiment 3
The present embodiment provides a kind of elevated vortex device being applicable to gas gathering pipeline, comprise admission line 3, pipeline 4 of giving vent to anger, the tube sheet 13 that is symmetrically set in admission line 3 and gives vent to anger between pipeline 4, admission line 3 and give vent to anger between pipeline 4 and be provided with vortex generator 10, the housing bottom of vortex generator 10 is connected with straight length 11, vortex generator 10 and straight length 11 outside are provided with lower valve body 2, admission line 3 and pipeline 4 of giving vent to anger are through lower valve body 2, and the upper end of lower valve body 2 is provided with bonnet 1.
Vortex generator 10 is all connected with sliding slot board 12 with straight length 11 two ends, and sliding slot board 12 is connected with tube sheet 13, and tube sheet 13 is all fixed with seal ring; The housing tip of vortex generator 10 is connected with screw rod 6, and screw rod 6 top is provided with handwheel 5, and bonnet 1 vertical direction runs through and is provided with screw thread, and screw rod 6 is threaded with bonnet 1 through bonnet 1; The housing of vortex generator 10 is the circular tube shaped of both ends open, and the housing of vortex generator 10 and the external diameter of straight length 11 are all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, and wherein, vortex generator 10 is turbine.
The working procedure of the elevated vortex device of the present embodiment: vortex generator 10 and straight length about 11 are connected between two pieces of sliding slot boards 12, and two pieces of sliding slot boards 12 are positioned over admission line 3 and give vent to anger between pipeline 4 between symmetrically arranged two tube sheets 13, during the elevated vortex device of normal use, vortex generator 10 is with admission line 3 and give vent to anger pipeline 4 tube sheet 13 just to level line, vortex generator 10 utilizes rock gas to drive, effectively prevent rock gas from gathering line, producing hydrops, reduce line pressure loss, improve pipeline transfer efficiency, reduce the pipeline pigging frequency, reduce the security risk brought by pigging operation.
When the logical ball pigging of needs, upwards rotate handwheel 5, screw rod 6 rises, because screw rod 6 is connected to the housing tip of vortex generator 10, drive the housing of vortex generator 10, straight length 11 and sliding slot board 12 between two tube sheets 13 on move, until the two ends of straight length 11 and admission line 3 tube sheet 13 with give vent to anger pipeline 4 tube sheet 13 level connection joint, thus vortex generator 10 is replaced by straight length 11, like this, spherical pig just can pass through smoothly.
Due to tube sheet 13 being all fixed with seal ring, and the external diameter of the housing of vortex generator 10 and straight length 11 is all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, and screw rod 6 is threaded with bonnet 1 through bonnet 1, so after the two ends of upwards rotating handwheel 5 to straight length 11 and admission line 3 tube sheet 13 and pipeline 4 tube sheet 13 level connection joint of giving vent to anger, straight length 11 can more firmly between two pieces of tube sheets 13, can not drop downwards, reduce labor intensity, the leakage of rock gas can be prevented simultaneously, simultaneously because vortex generator 10 and straight length 11 outside are provided with lower valve body 2, admission line 3 and pipeline 4 of giving vent to anger are through lower valve body 2, the upper end of lower valve body 2 is provided with bonnet 1, handwheel 5 is through bonnet 1, following valve body 2, a confined space is formed between bonnet 1, prevent the leakage of rock gas further.
After pigging, forward handwheel 5 downwards to, screw rod 6 is downward, and vortex generator 10 recovers with admission line 3 and gives vent to anger pipeline 4 tube sheet 13 just to level line, and vortex generator 10 puts back to normal pipeline position, can not affect gathering line and normally run.
Embodiment 4
The present embodiment provides a kind of elevated vortex device being applicable to gas gathering pipeline as shown in Figure 1, 2, 3, comprise admission line 3, pipeline 4 of giving vent to anger, the tube sheet 13 that is symmetrically set in admission line 3 and gives vent to anger between pipeline 4, admission line 3 and give vent to anger between pipeline 4 and be provided with vortex generator 10, the housing bottom of vortex generator 10 is connected with straight length 11, vortex generator 10 and straight length 11 outside are provided with lower valve body 2, admission line 3 and pipeline 4 of giving vent to anger are through lower valve body 2, and the upper end of lower valve body 2 is provided with bonnet 1.Bonnet 1 center is provided with the loading pipe 8 through bonnet 1, fills up stuffing box packing 9 in loading pipe 8, and the upper and lower end of loading pipe 8 is equipped with sealing gland 7, and sealing gland 7 is equipped with screw thread, and handwheel 5 is through loading pipe 8.
Vortex generator 10 is all connected with sliding slot board 12 with straight length 11 two ends, and sliding slot board 12 is connected with tube sheet 13, and tube sheet 13 is all fixed with seal ring; The housing tip of vortex generator 10 is connected with screw rod 6, and screw rod 6 top is provided with handwheel 5, and screw rod 6 is threaded with sealing gland 7 through sealing gland 7; The housing of vortex generator 10 is the circular tube shaped of both ends open, and the housing of vortex generator 10 and the external diameter of straight length 11 are all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, and wherein, vortex generator 10 is turbine.
The working procedure of the elevated vortex device of the present embodiment: vortex generator 10 and straight length about 11 are connected between two pieces of sliding slot boards 12, and two pieces of sliding slot boards 12 are positioned over admission line 3 and give vent to anger between pipeline 4 between symmetrically arranged two tube sheets 13, during the elevated vortex device of normal use, vortex generator 10 is with admission line 3 and give vent to anger pipeline 4 tube sheet 13 just to level line, vortex generator 10 utilizes rock gas to drive, effectively prevent rock gas from gathering line, producing hydrops, reduce line pressure loss, improve pipeline transfer efficiency, reduce the pipeline pigging frequency, reduce the security risk brought by pigging operation.
When the logical ball pigging of needs, upwards rotate handwheel 5, screw rod 6 rises, because screw rod 6 is connected to the housing tip of vortex generator 10, drive the housing of vortex generator 10, straight length 11 and sliding slot board 12 between two tube sheets 13 on move, until the two ends of straight length 11 and admission line 3 tube sheet 13 with give vent to anger pipeline 4 tube sheet 13 level connection joint, thus vortex generator 10 is replaced by straight length 11, like this, spherical pig just can pass through smoothly.
Due to tube sheet 13 being all fixed with seal ring, and the external diameter of the housing of vortex generator 10 and straight length 11 is all not more than admission line 3 or the external diameter of pipeline 4 of giving vent to anger, and screw rod 6 is threaded with bonnet 1 through bonnet 1, so after the two ends of upwards rotating handwheel 5 to straight length 11 and admission line 3 tube sheet 13 and pipeline 4 tube sheet 13 level connection joint of giving vent to anger, straight length 11 can more firmly between two pieces of tube sheets 13, can not drop downwards, reduce labor intensity, the leakage of rock gas can be prevented simultaneously, simultaneously because vortex generator 10 and straight length 11 outside are provided with lower valve body 2, admission line 3 and pipeline 4 of giving vent to anger are through lower valve body 2, the upper end of lower valve body 2 is provided with bonnet 1, bonnet 1 center is provided with the loading pipe 8 through bonnet 1, stuffing box packing 9 is filled up in loading pipe 8, loading pipe 8 upper, lower end is equipped with sealing gland 7, sealing gland 7 is equipped with screw thread, handwheel 5 is through loading pipe 8, following valve body 2, bonnet 1 and loading pipe 8, sealing gland 7 forms a confined space jointly, effectively prevent the leakage of rock gas further.
After pigging, forward handwheel 5 downwards to, screw rod 6 is downward, and vortex generator 10 recovers with admission line 3 and gives vent to anger pipeline 4 tube sheet 13 just to level line, and vortex generator 10 puts back to normal pipeline position, can not affect gathering line and normally run.
In sum, this elevated vortex device being applicable to gas gathering pipeline that the utility model provides can effectively prevent rock gas from gathering line, producing hydrops, reduce line pressure loss, improve pipeline transfer efficiency, reduce the pipeline pigging frequency, reduce the security risk brought by pigging operation, greatly reduce labor intensity, prevent the leakage of rock gas simultaneously.
The present embodiment does not have specifically described part all to belong to common practise and the known technology of the art, describes in detail no longer one by one herein.
More than exemplifying is only illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, everyly all belongs within protection scope of the present invention with the same or analogous design of the utility model.
Claims (9)
1. one kind is applicable to the elevated vortex device of gas gathering pipeline, comprise admission line (3), to give vent to anger pipeline (4), be symmetrically set in the tube sheet (13) between admission line (3) and pipeline of giving vent to anger (4), it is characterized in that: between described admission line (3) and pipeline of giving vent to anger (4), be provided with vortex generator (10), the housing bottom of described vortex generator (10) is connected with straight length (11), described vortex generator (10) is all connected with sliding slot board (12) with straight length (11) two ends, sliding slot board (12) is connected with tube sheet (13), (13) are all fixed with seal ring with described tube sheet,
The housing tip of described vortex generator (10) is connected with pull bar, and pull bar top is provided with handle;
The housing of described vortex generator (10) is the circular tube shaped of both ends open, and the housing of described vortex generator (10) and the external diameter of straight length (11) are all not more than the external diameter of admission line (3) or pipeline of giving vent to anger (4).
2. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 1, it is characterized in that: described vortex generator (10) and straight length (11) outside are provided with lower valve body (2), described admission line (3) and pipeline of giving vent to anger (4) are through lower valve body (2), the upper end of described lower valve body (2) is provided with bonnet (1), and described handle is through bonnet (1).
3. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 2, it is characterized in that: described bonnet (1) vertical direction runs through and is provided with screw thread, described pull bar is screw rod (6), screw rod (6) is threaded with bonnet (1) through bonnet (1), and described handle is handwheel (5).
4. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 2, it is characterized in that: described bonnet (1) center is provided with the loading pipe (8) through bonnet (1), stuffing box packing (9) is filled up in described loading pipe (8), the upper and lower end of loading pipe (8) is equipped with sealing gland (7), and described handle is through loading pipe (8).
5. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 4, it is characterized in that: described sealing gland (7) is equipped with screw thread, described pull bar is screw rod (6), screw rod (6) is threaded with sealing gland (7) through sealing gland (7), and described handle is handwheel (5).
6. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 1, is characterized in that: described vortex generator (10) is turbine.
7. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 1, is characterized in that: the housing outer diameter of described vortex generator (10) equals the external diameter of admission line (3) or pipeline of giving vent to anger (4).
8. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 1, is characterized in that: the external diameter of described straight length (11) equals the external diameter of admission line (3) or pipeline of giving vent to anger (4).
9. a kind of elevated vortex device being applicable to gas gathering pipeline according to claim 1, is characterized in that: the housing of described vortex generator (10) welds with straight length (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420684171.6U CN204312467U (en) | 2014-11-17 | 2014-11-17 | A kind of elevated vortex device being applicable to gas gathering pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420684171.6U CN204312467U (en) | 2014-11-17 | 2014-11-17 | A kind of elevated vortex device being applicable to gas gathering pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN204312467U true CN204312467U (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420684171.6U Expired - Fee Related CN204312467U (en) | 2014-11-17 | 2014-11-17 | A kind of elevated vortex device being applicable to gas gathering pipeline |
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| CN (1) | CN204312467U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757066A (en) * | 2016-02-29 | 2016-07-13 | 中国石油大学(华东) | Multifunctional accumulated liquid control valve |
-
2014
- 2014-11-17 CN CN201420684171.6U patent/CN204312467U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757066A (en) * | 2016-02-29 | 2016-07-13 | 中国石油大学(华东) | Multifunctional accumulated liquid control valve |
| CN105757066B (en) * | 2016-02-29 | 2018-03-02 | 中国石油大学(华东) | A kind of multi-functional hydrops control valve |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 |