CN114321398B - Outlet valve of low-pressure hot water circulating pump - Google Patents
Outlet valve of low-pressure hot water circulating pump Download PDFInfo
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- CN114321398B CN114321398B CN202111570324.5A CN202111570324A CN114321398B CN 114321398 B CN114321398 B CN 114321398B CN 202111570324 A CN202111570324 A CN 202111570324A CN 114321398 B CN114321398 B CN 114321398B
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- ring
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 238000005192 partition Methods 0.000 claims description 14
- 238000007710 freezing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 5
- 230000008676 import Effects 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- Details Of Valves (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to the technical field of valves, and discloses an outlet valve of a low-pressure hot water circulating pump, which solves the problem that liquid or gas leaks due to gaps at the center line of a screw rod and the center line of the valve of a current control valve; according to the invention, the fourth spring is stretched through the cooperation between the upper outer sleeve, the movable ring and the rotating rod, and when the valve is opened, the valve rod drives the fixed sleeve to move upwards, then the fourth spring resets and enables the movable ring to move upwards, then the upper outer sleeve moves upwards, and the sealing ring moves upwards and is tightly attached to the top of the inner cavity of the valve body, so that liquid or gas in the valve body is placed to leak out from a gap between the valve rod and the valve body, and the valve body has good sealing performance.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to an outlet valve of a low-pressure hot water circulating pump.
Background
The valve is a pipeline accessory for opening and closing a pipeline, controlling flow direction, adjusting and controlling parameters of a conveying medium, can be divided into a shutoff valve, a check valve, a regulating valve and the like according to the functions, is a control part in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflow pressure relief and the like, is used for the fluid control system, and is a valve used in the fluid control system from the simplest stop valve to the extremely complex automatic control system, and has quite various varieties and specifications, while the outlet valve is a part for isolating a pump from the system during flow adjustment, opening and shutdown maintenance, and is also used in a hot water circulating pump.
The existing outlet valve is inconvenient to use because of the problem of poor tightness caused by leakage of liquid or gas due to the fact that a gap is formed between a valve rod of a control valve and a central line of the valve after the valve is opened for a long time.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the low-pressure hot water circulating pump outlet valve, which effectively solves the problem that the center line between the screw rod of the existing control valve and the center of the valve can be provided with a gap so as to cause liquid or gas leakage.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a low pressure hot water circulating pump outlet valve, which comprises a valve body, the left side fixed mounting of valve body has the import, the right side fixed mounting of valve body has the export, the one end that export and import kept away from each other is all fixed mounting has the ring flange, the inside bottom of valve body is installed anti-freezing drainage mechanism, the valve gap is installed at the top of valve body, equiangular installation has the bolt between valve gap and the valve body, the inside movable mounting of valve body has the valve rod, the inside double seal mechanism that is located inside the valve body is installed to the outside of valve rod, the inner chamber bottom fixed mounting of valve body has the baffle, the import is located the left side of baffle, the export is located the right side of baffle, the opening has been seted up at the top of baffle, the inside of opening has been seted up the inside groove, the bottom fixed mounting of valve rod has the plunger, plunger and opening looks adaptation, the outside fixed mounting of plunger has the sealing ring, sealing ring and inside groove looks adaptation, the top fixed mounting of valve gap has the disc, disc and valve rod swing joint, equiangular fixed mounting has the support column at the top of disc, the top of support column, the inside fixed mounting of fixed mounting has the thread bush, the screw bottom of screw, the screw is fixedly connected with the top of screw rod, the top of screw opening is located the top of lead screw and the top is fixed disc and fixed mounting the hand wheel.
The anti-freezing drainage mechanism comprises a left fixed block which is positioned on the left side of the partition plate and fixedly connected with the partition plate, a vertical rod is fixedly connected to the bottom of the left fixed block, the bottom of the vertical rod is fixedly connected with the bottom of an inner cavity of the valve body, a sliding plate is movably sleeved on the outer side of the vertical rod, a right fixed block is fixedly connected to the right side of the partition plate, a sleeve is fixedly connected to the bottom of the right fixed block, a movable rod is movably sleeved on the inner side of the sleeve, a second spring which is movably sleeved on the movable rod is fixedly connected to the bottom of the sleeve, sealing blocks are fixedly connected to the bottoms of the sliding plate and the movable rod, movable columns are fixedly connected to the bottoms of the two sealing blocks, a connecting rod is fixedly connected between the bottoms of the two movable columns, through holes are respectively formed in two sides of the bottom of the valve body, the two through holes are respectively movably connected with the two movable columns, the inner diameter value of the through holes is larger than the outer diameter value of the movable columns, a bottom plate is fixedly arranged at the bottom of the valve body, and the connecting rod is positioned below the bottom plate;
the double sealing mechanism comprises a fixed ring which is positioned inside the valve body and fixedly connected with the valve body, an upright post is fixedly connected to the top of the fixed ring at equal angles, a movable ring is movably connected to the outer side of the upright post, a fourth spring is fixedly connected to the bottom of the movable ring, a side rod is movably sleeved with the fourth spring, an upper outer sleeve is movably connected to the outer side of the valve rod, a sealing ring is fixedly connected to the top of the upper outer sleeve, a rotating rod is movably connected to the bottom of the rotating rod at equal angles, a first connecting shaft is fixedly connected to the bottom of the upper outer sleeve at equal angles, a first connecting shaft is rotatably connected to the top of the rotating rod, a second connecting shaft is fixedly connected to the bottom of the rotating rod at equal angles, a side rod is fixedly connected to the bottom of the upper outer sleeve, a lower outer sleeve is fixedly connected to the bottom of the valve rod, a fixed sleeve positioned inside the valve body is movably connected to the outer side rod, the fixed sleeve is positioned at the top of the lower outer sleeve, a bottom of the lower outer sleeve is fixedly connected to the bottom of the rotating rod, a bottom sealing unit is fixedly connected to the bottom of the rotating rod, the bottom of the bottom ring is fixedly connected to the bottom of the rotating rod, and the bottom ring is movably connected to the top of the rotating rod at equal angles, and the bottom of the bottom ring is movably connected to the top of the valve rod is movably connected to the bottom of the valve rod.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, through the cooperation between the valve rod and the fixed sleeve, when the valve rod moves downwards and the plunger is positioned in the opening, the valve is closed at the moment, meanwhile, through the cooperation between the lower outer sleeve, the side rod and the upper outer sleeve, the sealing ring moves downwards, and meanwhile, through the cooperation between the upper outer sleeve, the movable ring and the rotating rod, the fourth spring stretches, when the valve is opened, the valve rod drives the fixed sleeve to move upwards, then the fourth spring resets and enables the movable ring to move upwards, then the upper outer sleeve moves upwards, so that the sealing ring moves upwards and is tightly attached to the top of the inner cavity of the valve body, and liquid or gas in the valve body is placed to leak out from a gap between the valve rod and the valve body, so that the valve body has good sealing performance.
(2) According to the invention, through the cooperation between the valve rod, the sealing gasket and the bottom ring, when the valve is closed to enable the valve rod to move downwards, the bottom ring and the sealing gasket move downwards at the moment, meanwhile, through the cooperation between the bottom ring and the moving rod, the third spring is compressed, and when the valve is opened to enable the valve rod to be enabled, the sealing gasket moves upwards and is tightly attached to the fixed ring at the moment, so that the sealing performance of the valve body is improved.
(3) According to the invention, through the cooperation between the connecting rod and the movable column as well as the sealing block, the connecting rod can be enabled to move upwards, then the sealing block is enabled to move upwards and be attached to the bottom of the inner cavity of the valve body, meanwhile, through the cooperation between the sliding plate and the vertical rod, the first spring is enabled to be compressed, meanwhile, through the cooperation between the movable rod and the sleeve, the second spring is enabled to be compressed, water in the outlet, the inlet and the valve body can be enabled to be discharged from the inside of the through hole, water is prevented from being left in the valve body, the outlet and the inlet and being frozen in the lower-temperature environment, damage to the valve body is prevented, and when the control of the connecting rod is released, the first spring and the second spring are enabled to reset and enable the sealing blocks on two sides to move downwards until being attached to the bottom of the inner cavity of the valve body, so that the through hole is blocked, and the valve body can be reused.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of a valve stem structure according to the present invention;
FIG. 3 is a schematic illustration of an exploded construction of a valve stem of the present invention;
FIG. 4 is a schematic view of a dual seal mechanism according to the present invention;
FIG. 5 is a schematic diagram of a movable ring structure according to the present invention;
FIG. 6 is a schematic view of the bottom sealing unit structure of the present invention;
fig. 7 is a schematic structural view of the antifreeze drainage mechanism of the present invention.
In the figure: 1. a valve body; 2. a flange plate; 3. an outlet; 4. a partition plate; 5. an antifreezing drainage mechanism; 501. a left fixed block; 502. a first spring; 503. a right fixed block; 504. a sleeve; 505. a second spring; 506. a movable rod; 507. a movable column; 508. a vertical rod; 509. a connecting rod; 5010. a bottom plate; 5011. a through hole; 5012. a sealing block; 5013. a slide plate; 6. an inlet; 7. a double seal mechanism; 701. a fixing ring; 702. a bottom sealing unit; 7021. a bottom ring; 7022. a moving rod; 7023. a sealing gasket; 7024. a third spring; 703. a lower outer sleeve; 704. a fixed sleeve; 705. a side bar; 706. an upper outer sleeve; 707. a seal ring; 708. a fourth spring; 709. a column; 7010. a rotating lever; 7011. a movable ring; 8. a valve cover; 9. a valve stem; 10. a hand wheel; 11. a screw rod; 12. a disc; 13. a bolt; 14. a plunger; 15. a fixed plate; 16. a thread sleeve; 17. a support column; 18. an opening; 19. an inner tank; 20. and (3) a sealing ring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
1-5, the invention includes valve body 1, the left side of valve body 1 is fixedly equipped with import 6, the right side of valve body 1 is fixedly equipped with export 3, export 3 and import 6 are all fixedly equipped with ring flange 2 each far away from one another, the inside bottom of valve body 1 is equipped with freeze-proof drainage mechanism 5, valve gap 8 is installed at the top of valve body 1, equiangular install bolt 13 between valve gap 8 and valve body 1, valve rod 9 is movably installed in inside of valve body 1, the outside of valve rod 9 is equipped with double seal mechanism 7 in valve body 1, the inner chamber bottom of valve body 1 is fixedly equipped with baffle 4, import 6 is located the left side of baffle 4, export 3 is located the right side of baffle 4, the top of baffle 4 is equipped with opening 18, the inside of opening 18 is equipped with inside groove 19, the bottom of valve rod 9 is fixedly equipped with plunger 14, plunger 14 and opening 18 looks adaptation, the outside of plunger 14 is fixedly equipped with sealing ring 20 and inside groove 19 looks adaptation, the top of valve gap 8 is fixedly equipped with disc 12, disc 12 and valve rod 9 movable connection, the top of disc 12 and valve rod 9 is fixedly equipped with, the top 17 and bottom of the inside of support column 15 is fixedly equipped with the top of support column 15 fixedly equipped with equiangular sleeve 15, the top of screw rod is fixedly equipped with top of support column 11 fixedly equipped with screw thread sleeve 15, the top of screw mandrel is fixedly equipped with top of support column 11 is fixedly equipped with top of support column 15 is fixedly equipped with top of screw rod 11.
In the second embodiment, based on the first embodiment, the anti-freezing drainage mechanism 5 comprises a left fixed block 501 which is positioned at the left side of the partition board 4 and is fixedly connected with the partition board 4, the bottom of the left fixed block 501 is fixedly connected with a vertical rod 508, the bottom of the vertical rod 508 is fixedly connected with the bottom of the inner cavity of the valve body 1, the outer side of the vertical rod 508 is movably sleeved with a sliding plate 5013, the right side of the partition board 4 is fixedly connected with a right fixed block 503, the bottom of the right fixed block 503 is fixedly connected with a sleeve 504, the inside of the sleeve 504 is movably sleeved with a movable rod 506, the bottom of the sleeve 504 is fixedly connected with a second spring 505 which is movably sleeved with the movable rod 506, the bottoms of the sliding plate 5013 and the movable rod 506 are fixedly connected with sealing blocks 5012, the bottoms of the two sealing blocks 5012 are fixedly connected with movable posts 507, a connecting rod 509 is fixedly connected between the bottoms of the two movable posts 507, through holes 5011 are respectively movably connected with the two movable posts 507, the inner diameter of the through holes 5011 is larger than the outer diameter of the movable posts 507, the bottom of the valve body 1 is fixedly provided with a bottom plate 5010, the connecting rod 5010 is positioned below the two movable posts 5010, and the two movable posts 5010 are movably connected with the bottom plate 0;
when the valve is closed, the valve rod 9 moves downwards at the moment, the fixing sleeve 704 is driven to move downwards at the moment, the lower outer sleeve 703 is driven to move downwards at the moment, the upper outer sleeve 706 is driven to move downwards at the moment, the sealing ring 707 is separated from the top of the inner cavity of the valve body 1, the movable ring 7011 is driven to move downwards at the moment, the fourth spring 708 stretches, the moving rod 7022 and the bottom ring 7021 are driven to move downwards at the moment, the sealing gasket 7023 is separated from the fixing ring 701 at the moment, the third spring 7024 stretches at the moment, and when the valve is opened, the third spring 7024 resets and enables the valve rod 9 to move upwards at the moment, the sealing gasket 7023 is driven to move upwards until the sealing gasket 7023 is attached to the bottom of the fixing ring 701, so that leakage of water from a gap between the sealing gasket 7023 and the fixing ring 701 is prevented, the fourth spring 708 resets and enables the movable ring 7011 to move upwards at the moment, the sealing ring 707 is driven to move upwards until the top of the inner cavity of the valve body 1 is located at the top of the valve body 1, so that leakage of water from the gap between the valve rod 9 and the valve body 1 is prevented, and sealing performance of the valve body 1 is improved.
The third embodiment is based on the first embodiment, the double sealing mechanism 7 comprises a fixed ring 701 which is positioned inside the valve body 1 and is fixedly connected with the valve body 1, a stand column 709 is fixedly connected to the bottom of the fixed ring 701 in an equal angle mode, a movable ring 7011 is movably connected to the outer side of the stand column 709, a fourth spring 708 is fixedly connected to the top of the movable ring 7011, the fourth spring 708 is movably sleeved with the stand column 709, an upper external sleeve 706 is movably connected to the outer side of the valve rod 9, a sealing ring 707 is fixedly connected to the top of the upper external sleeve 706, a rotating rod 7010 is movably connected to the bottom of the upper external sleeve 706 in an equal angle mode, the bottom of the rotating rod 7010 is movably connected to the movable ring 7011, a first connecting shaft is fixedly connected to the bottom of the upper external sleeve 706 in an equal angle mode, a second connecting shaft is fixedly connected to the inner side rod 7011 in an equal angle mode, the second connecting shaft is rotatably connected to the bottom of the rotating rod 7010, a side rod 705 is fixedly connected to the bottom of the upper external sleeve 705, a lower external sleeve 703 is fixedly connected to the bottom of the lower external sleeve 703 is movably connected to the bottom of the valve rod 709, a lower sleeve 703 is movably connected to the valve rod 7022 is movably connected to the bottom of the valve rod 7022, an equal angle of the valve rod 7021 is movably connected to the bottom of the valve body 1, and is movably connected to the bottom of the valve rod 7022, and the valve body 7022 is movably connected to the bottom of the valve body 21, and the bottom of the valve rod 7021 is movably sleeve, and the bottom of the valve body 21 is movably connected to the bottom of the valve rod 7021.
When residual water exists in the valve body 1, the outlet 3 and the inlet 6, the connecting rod 509 is pushed upwards firstly, the movable column 507 is driven to move upwards at the moment, the sealing block 5012 is separated from the bottom of the inner cavity of the valve body 1, the first spring 502 and the second spring 505 are compressed at the same time, the residual water in the valve body 1, the outlet 3 and the inlet 6 can be discharged from the through hole 5011 at the moment, and when the limitation of the connecting rod 509 is released, the first spring 502 and the second spring 505 are reset at the moment and the sealing block 5012 is driven to move downwards until the sealing block 5012 is attached to the bottom of the inner cavity of the valve body 1, so that the through hole 5011 is blocked, and the residual water in the valve body 1, the outlet 3 and the inlet 6 can be prevented from freezing in a low-temperature environment, and damage to the valve body 1 can be prevented.
Claims (1)
1. The utility model provides a low pressure hot water circulation pump outlet valve, includes valve body (1), its characterized in that: the utility model discloses a valve body, a valve body (1) is characterized in that an inlet (6) is fixedly arranged on the left side of the valve body (1), an outlet (3) is fixedly arranged on the right side of the valve body (1), a flange plate (2) is fixedly arranged at one end, far away from the inlet (6), of the outlet (3), an antifreezing drainage mechanism (5) is arranged at the inner bottom of the valve body (1), an inner groove (19) is arranged at the top of the valve body (1), a plunger (14) is fixedly arranged at the bottom of the valve body (9), a bolt (13) is arranged between the valve cover (8) and the valve body (1) at equal angles, a double-sealing mechanism (7) arranged in the valve body (1) is arranged at the outer side of the valve rod (9), a partition plate (4) is fixedly arranged at the bottom of an inner cavity of the valve body (1), the inlet (6) is arranged on the left side of the partition plate (4), the outlet (3) is arranged on the right side of the partition plate (4), an opening (18) is arranged at the top of the partition plate (4), an inner groove (19) is arranged at the inner part of the opening (18), a plunger (14) is fixedly arranged at the bottom of the valve rod (9), a plunger (14) is matched with the opening (18), a sealing ring (20) is fixedly arranged at the bottom of the valve rod (20), a sealing ring (20) is fixedly arranged at the top of the inner groove (8), the disc (12) is movably connected with the valve rod (9), a supporting column (17) is fixedly arranged at the top of the disc (12) at equal angles, a fixed disc (15) is fixedly arranged at the top of the supporting column (17), a threaded sleeve (16) is fixedly arranged in the fixed disc (15), a screw rod (11) is sleeved on the internal thread of the threaded sleeve (16), the bottom end of the screw rod (11) is fixedly connected with the top end of the valve rod (9), and a hand wheel (10) positioned above the fixed disc (15) is fixedly arranged at the top of the screw rod (11);
the anti-freezing drainage mechanism (5) comprises a left fixed block (501) which is positioned on the left side of a partition board (4) and fixedly connected with the partition board (4), a vertical rod (508) is fixedly connected to the bottom of the left fixed block (501), a sliding plate (5013) is movably sleeved on the outer side of the vertical rod (508), a right fixed block (503) is fixedly connected to the right side of the partition board (4), a sleeve (504) is fixedly connected to the bottom of the right fixed block (503), a movable rod (506) is movably sleeved in the sleeve (504), a second spring (505) which is movably sleeved with the movable rod (506) is fixedly connected to the bottom of the sleeve (504), sealing blocks (5012) are fixedly connected to the bottoms of the sliding plate (5013) and the movable rod (506), movable columns (507) are fixedly connected to the bottoms of the two sealing blocks (5012), connecting rods (509) are fixedly connected between the bottoms of the two movable columns (507), through holes (5011) are respectively arranged on two sides of the bottom of the valve body (1), the two through holes (5011) are respectively connected with the two movable columns (507) and are fixedly connected with the bottom of the valve body (509) of the movable column (509) at a large value of the bottom of the valve body (5010), the two movable columns (507) are movably connected with the bottom plate (5010);
the double-sealing mechanism (7) comprises a fixed ring (701) which is positioned in the valve body (1) and fixedly connected with the valve body (1), a stand column (709) is fixedly connected to the top of the fixed ring (701) at equal angles, a movable ring (7011) is movably connected to the outer side of the stand column (709), a fourth spring (708) is fixedly connected to the top of the movable ring (7011), a second connecting shaft is movably sleeved with the stand column (709) in a sleeved mode, an upper outer connecting sleeve (706) is movably connected to the outer side of the valve rod (9), a sealing ring (707) is fixedly connected to the top of the upper outer connecting sleeve (706), a rotating rod (7010) is movably connected to the bottom of the upper outer connecting sleeve (706), a first connecting shaft is fixedly connected to the bottom of the rotating rod (7011) at equal angles, a second connecting shaft is rotatably connected to the top of the rotating rod (7010), a second connecting shaft is fixedly connected to the inner side of the rotating ring (7011) at equal angles, a rotating rod (703) is fixedly connected to the bottom of the lower connecting sleeve (703), the outside of valve rod (9) has cup jointed fixed cover (704) that are located valve body (1) inside, fixed cover (704) are located the top of external cover (703) down, bottom sealing unit (702) that are connected with valve rod (9) are installed to the below of external cover (703) down, bottom ring (7021) have been cup jointed to the outside of valve rod (9), the top fixed mounting of bottom ring (7021) has sealed pad (7023), the top equiangular fixed mounting of bottom ring (7021) has movable rod (7022), movable rod (7022) and valve body (1) swing joint, the top fixedly connected with of bottom ring (7021) third spring (7024) that cup joints with movable rod (7022) activity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570324.5A CN114321398B (en) | 2021-12-21 | 2021-12-21 | Outlet valve of low-pressure hot water circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111570324.5A CN114321398B (en) | 2021-12-21 | 2021-12-21 | Outlet valve of low-pressure hot water circulating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114321398A CN114321398A (en) | 2022-04-12 |
| CN114321398B true CN114321398B (en) | 2024-03-12 |
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ID=81055341
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111570324.5A Active CN114321398B (en) | 2021-12-21 | 2021-12-21 | Outlet valve of low-pressure hot water circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114321398B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118088743B (en) * | 2024-04-17 | 2024-06-28 | 泉城阀门有限公司 | Emergency leakage-proof valve |
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| JPH10220601A (en) * | 1997-02-03 | 1998-08-21 | Hikari Gokin Seisakusho:Kk | Contraflow preventive type drain valve |
| KR20170011094A (en) * | 2015-07-21 | 2017-02-02 | 동아대학교 산학협력단 | T-type gate valve for frost protection |
| CN110748652A (en) * | 2019-10-31 | 2020-02-04 | 南通龙源电站阀门有限公司 | Vacuum die-casting stop valve of hydraulic pump |
| CN112460270A (en) * | 2020-12-14 | 2021-03-09 | 刘谦明 | Quantitative limiting valve for crude oil conveying pipeline |
| CN112879571A (en) * | 2021-01-18 | 2021-06-01 | 湖北三江航天红峰控制有限公司 | Low-temperature corrugated pipe valve |
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-
2021
- 2021-12-21 CN CN202111570324.5A patent/CN114321398B/en active Active
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|---|---|---|---|---|
| JPH10220601A (en) * | 1997-02-03 | 1998-08-21 | Hikari Gokin Seisakusho:Kk | Contraflow preventive type drain valve |
| KR20170011094A (en) * | 2015-07-21 | 2017-02-02 | 동아대학교 산학협력단 | T-type gate valve for frost protection |
| CN110748652A (en) * | 2019-10-31 | 2020-02-04 | 南通龙源电站阀门有限公司 | Vacuum die-casting stop valve of hydraulic pump |
| CN112460270A (en) * | 2020-12-14 | 2021-03-09 | 刘谦明 | Quantitative limiting valve for crude oil conveying pipeline |
| CN112879571A (en) * | 2021-01-18 | 2021-06-01 | 湖北三江航天红峰控制有限公司 | Low-temperature corrugated pipe valve |
| CN215172518U (en) * | 2021-01-22 | 2021-12-14 | 浙江华驰阀门有限公司 | Lifting check valve with good sealing performance |
Non-Patent Citations (1)
| Title |
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| 超高压脉冲调节阀填料密封结构改进;贺亚刚;;石油和化工设备(第06期);第58-61页 * |
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| CN114321398A (en) | 2022-04-12 |
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