CN110056690B - Leakless hydraulic buffer vacuum damage air compensating valve - Google Patents
Leakless hydraulic buffer vacuum damage air compensating valve Download PDFInfo
- Publication number
- CN110056690B CN110056690B CN201810065987.3A CN201810065987A CN110056690B CN 110056690 B CN110056690 B CN 110056690B CN 201810065987 A CN201810065987 A CN 201810065987A CN 110056690 B CN110056690 B CN 110056690B
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- Prior art keywords
- valve
- cylinder
- valve rod
- hydraulic
- valve plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000872 buffer Substances 0.000 title claims abstract description 30
- 230000006378 damage Effects 0.000 title claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 101100234547 Caenorhabditis elegans rod-1 gene Proteins 0.000 description 19
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000001502 supplementing effect Effects 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a leak-free hydraulic buffer vacuum damage air compensating valve; the hydraulic cylinder and the valve plate are arranged through the air compensating valve, the hydraulic cylinder is arranged on the valve plate and acts together with the valve plate, the sliding seal between the bottom of the hydraulic cylinder and the valve rod is positioned in the hydraulic buffer cavity, the complete seal in the hydraulic cylinder is ensured, the hydraulic buffer oil is in a complete seal state, the sealing abrasion leakage is avoided, and the service life of the air compensating device is prolonged; the throttle valve arranged on the air compensating valve improves the buffer effect of the valve plate at the closing position, reduces noise generated by collision between the valve plate and the valve seat, and the supporting sleeve not only plays a role in supporting the hydraulic cylinder, but also balances the radial force when the valve plate is opened and closed to improve the fatigue life of the air compensating device; in addition, the air compensating valve is simple in structure, reasonable in design, safe and reliable, and potential safety hazards in operation of the water turbine are effectively reduced.
Description
Technical Field
The invention provides a leak-free hydraulic buffer vacuum damage air compensating valve, and belongs to the technical field of water turbine equipment.
Background
At present, the air supplementing device of the hydraulic turbine is usually hydraulically buffered, a hydraulic cylinder is fixed on a valve body, a valve rod is fixed on a valve plate, hydraulic oil is filled in the hydraulic cylinder, when vacuum is generated in a runner and air supplementing is needed, the valve rod and the valve plate move together, the hydraulic oil buffers the valve plate speed, and the valve plate and the valve body are prevented from generating strong impact when frequent air supplementing is guaranteed.
Because valve rod and valve plate are connected integrative motion, the pneumatic cylinder bottom must be equipped with the removal and seal with valve rod cooperation part, and the sealed necessarily produces wearing and tearing after a period of operation, and the hydraulic oil in the pneumatic cylinder can gradually leak outside, and after the hydraulic oil in the pneumatic cylinder all leaked, the buffer function of air supplement unit became invalid, when continuing to work, the valve plate can take place strong metal striking with the valve body, and this not only produces powerful noise, can accelerate the damage of part moreover, simultaneously brings the potential safety hazard for water turbine operation.
Disclosure of Invention
The invention aims to solve the problems and provide a leak-free hydraulic buffer vacuum damage air compensating valve; the hydraulic cylinder and the valve plate are arranged through the air compensating valve, the hydraulic cylinder is arranged on the valve plate and acts together with the valve plate, the sliding seal between the bottom of the hydraulic cylinder and the valve rod is positioned in the hydraulic buffer cavity, the complete seal in the hydraulic cylinder is ensured, the hydraulic buffer oil is in a complete seal state, the sealing abrasion leakage is avoided, and the service life of the air compensating device is prolonged; the throttle valve arranged on the air compensating valve improves the buffer effect of the valve plate at the closing position, reduces noise generated by collision between the valve plate and the valve body, and the supporting sleeve not only plays a role in supporting the hydraulic cylinder, but also balances the radial force when the valve plate is opened and closed to improve the fatigue life of the air compensating device; in addition, the air compensating valve is simple in structure, reasonable in design, safe and reliable, and potential safety hazards in operation of the water turbine are effectively reduced.
In order to achieve the above purpose, the invention is realized by the following technical means:
the utility model provides a no leakage hydraulic pressure buffering vacuum destruction air compensating valve, it comprises valve rod, valve body, support cover, upper cylinder cap, valve rod axle bush, valve rod seal, pneumatic cylinder, buffer board, valve plate, clamp plate, main seal, lower cylinder cap, guiding band, piston seal, choke valve part, characterized by: the valve rod upper end is provided with the inlet and exhaust hole, the valve rod bottom is provided with the oil through hole, the valve rod middle part is provided with the boss, be provided with the buffer board on the boss, be provided with the passageway of ventilating in the valve rod, the passageway of ventilating, the valve rod is through nut and valve body looks fixed connection, the valve rod lower extreme, in the pneumatic cylinder is packed into to the spring, valve rod lower extreme both sides are connected with the pneumatic cylinder through the guiding strip, piston seal, the valve body is through bolt and supporting sleeve looks fixed connection, the pneumatic cylinder upper end is provided with the cylinder cap, the valve rod axle bush, the valve rod is sealed, the pneumatic cylinder lower extreme is provided with the cylinder cap down, the cylinder cap lower extreme is provided with the choke valve, the pneumatic cylinder is connected with the supporting sleeve through the cylinder body axle bush, be provided with main seal 14 on the valve plate, the clamp plate, the pneumatic cylinder, the cylinder cap down, the cylinder cap, the annex is assembled in an organic whole through bolt and valve plate, for axial displacement part.
The sliding seal between the bottom end of the valve rod and the hydraulic cylinder is positioned in a hydraulic buffer cavity formed by the hydraulic cylinder, the upper cylinder cover and the lower cylinder cover.
The lower end of the lower cylinder cover is provided with a throttle valve, when the valve is closed to be close to the fully closed position, the throttle valve stretches into an oil through hole at the bottom end of the valve rod, the speed of the valve plate is reduced, and the metal impact between the valve plate and the valve body is reduced.
When the valve plate is opened and closed, gas in the hydraulic cylinder is sucked and discharged through the air inlet and outlet holes at the upper part of the valve rod.
The valve body is in a truncated cone shape, and the conical surface is provided with a vent hole.
Working principle: firstly, when the vacuum degree of the lower part of the valve plate does not reach an opening value, the valve plate is in a fully closed position under the action of a spring, and air at the upper part of the valve plate cannot enter the lower part; then, when the vacuum degree of the lower part of the valve plate is increased to reach an opening value, the valve plate is opened and moves downwards under the combined action of the spring and the atmospheric pressure, and air on the upper part of the valve plate enters the lower part through an annular channel formed by the valve plate and the valve body, so that the air supplementing purpose is achieved; then, when the vacuum degree of the lower part of the valve plate is reduced, the atmospheric pressure acting on the valve plate is reduced, the valve plate moves upwards in the closing direction under the combined action of the spring and the atmospheric pressure, and the air amount of the air in the upper part of the valve plate entering the lower part is reduced; finally, when the vacuum level of the lower portion of the valve plate further drops below the opening value, the valve plate returns to the closed position.
The invention has the following advantages:
1. the hydraulic cylinder and the valve plate are arranged on the valve plate, the hydraulic cylinder acts together with the valve plate, sliding seal between the bottom of the hydraulic cylinder and the valve rod is positioned in the hydraulic buffer cavity, the hydraulic buffer oil in the hydraulic cylinder is guaranteed to be in a complete sealing state, sealing abrasion leakage is avoided, and the service life of the air supplementing device is prolonged.
2. The throttle valve that this air compensating valve set up has improved the buffering effect of valve plate in closed position, has reduced the noise that valve plate and valve body striking produced, and the support sleeve has not only played the effect of supporting the pneumatic cylinder, has still balanced radial force when valve plate switch and has improved air compensating device's fatigue life, and simultaneously, the spring that this air compensating valve set up makes the axial force obtain balance.
3. The air compensating valve is simple in structure, reasonable in design, safe and reliable, and effectively reduces potential safety hazards in operation of the water turbine.
Drawings
FIG. 1 is a schematic diagram of an installation state of a leak-free hydraulic buffer vacuum break air compensating valve according to the present invention;
FIG. 2 is a schematic illustration of the leak-free hydraulic buffer vacuum break make-up valve in an open intermediate travel condition;
FIG. 3 is a schematic illustration of the leak-free hydraulic buffer vacuum break make-up valve of the present invention in a fully open state;
FIG. 4 is a schematic illustration of the leak-free hydraulic buffer vacuum break make-up valve of the present invention in a closed intermediate travel condition.
As shown in fig. 1-4, the various parts of the figures are represented by the following arabic numerals:
the valve comprises a valve rod-1, a nut-2, a valve body-3, a supporting sleeve-4, an upper cylinder cover-5, a valve rod bearing bush-6, a valve rod seal-7, a spring-8, a hydraulic cylinder-9, a buffer plate-10, a cylinder body bearing bush-11, a valve plate-12, a pressing plate-13, a main seal-14, a lower cylinder cover-15, a guide belt-16, a piston seal-17 and a throttle valve-18.
The invention is described in further detail below with reference to examples and the accompanying drawings:
Detailed Description
Examples
As shown in fig. 1-4, the leak-free hydraulic buffer vacuum breaking air compensating valve consists of a valve rod 1, a nut 2, a valve body 3, a supporting sleeve 4, an upper cylinder cover 5, a valve rod bearing bush 6, a valve rod seal 7, a spring (8), a hydraulic cylinder 9, a buffer plate 10, a valve plate 12, a pressing plate 13, a main seal 14, a lower cylinder cover 15, a guide belt 16, a piston seal 17 and a throttle valve 18.
As shown in fig. 1-4, the upper end of the valve rod 1 is provided with an air inlet and an air outlet, the bottom end of the valve rod 1 is provided with an oil through hole, the middle part of the valve rod 1 is provided with a boss, a buffer plate 10 is arranged on the boss, an air channel and an oil through channel are arranged in the valve rod 1, the valve rod 1 is fixedly connected with the valve body 3 through a nut 2, the lower end of the valve rod 1 and a spring 8 are arranged in a hydraulic cylinder 9, two sides of the lower end of the valve rod 1 are connected with the hydraulic cylinder 9 through guide belts 16 and piston seals 17, the valve body 3 is fixedly connected with a supporting sleeve 4 through bolts, the upper end of the hydraulic cylinder 9 is provided with an upper cylinder cover 5, a valve rod bearing bush 6 and a valve rod seal 7, the lower end of the hydraulic cylinder 9 is provided with a lower cylinder cover 15, the lower end of the lower cylinder cover 15 is provided with a throttle valve 18, the hydraulic cylinder 9 is connected with a supporting sleeve 4 through a cylinder body bearing 11, the hydraulic cylinder 9 is connected with a valve plate 12 through bolts, a main seal 14 and a pressing plate 13 are arranged on the valve plate 12, the hydraulic cylinder 9, the upper cylinder cover 5, the lower cylinder cover 15 and accessories are assembled with the valve plate 12 into a whole through bolts, and are axial moving parts.
The sliding seal between the bottom end of the valve rod 1 and the hydraulic cylinder 9 is positioned in a hydraulic buffer cavity formed by the hydraulic cylinder 9, the upper cylinder cover 5 and the lower cylinder cover 15.
The lower end of the lower cylinder cover 15 is provided with a throttle valve 18, when the valve is closed to be close to the fully closed position, the throttle valve 18 stretches into an oil through hole at the bottom end of the valve rod 1, the speed of the valve plate 12 is reduced, and the metal impact between the valve plate 12 and the valve body 3 is lightened.
When the valve plate 12 is opened and closed, gas in the hydraulic cylinder 9 is sucked and discharged through the air inlet and outlet holes at the upper part of the valve rod 1.
The valve body 3 is in a truncated cone shape, and the conical surface is provided with a vent hole.
As shown in fig. 2, after the vacuum degree of the lower part of the valve plate 12 increases to a certain extent, hydraulic oil at the upper part of the hydraulic cylinder 9 enters the lower cavity of the hydraulic cylinder 9 through the through hole at the lower part of the valve rod 1, gas in the hydraulic cylinder 9 is discharged through the through hole at the upper part of the valve rod 1, the valve plate 12 and the hydraulic cylinder 9 move downwards to the middle stroke position, and external gas enters the lower side of the valve plate along the dotted line and the arrow direction in the drawing through the vent hole on the valve body 3 and the opening of the valve plate 12, so as to achieve the purpose of supplementing a small amount of gas.
As shown in fig. 3, when the vacuum degree of the lower part of the valve plate increases to a higher degree, hydraulic oil at the upper part of the hydraulic cylinder 9 completely enters the lower cavity of the hydraulic cylinder 9 through the through hole at the lower part of the valve rod 1, part of gas enters the lower cavity, the gas in the hydraulic cylinder 9 is discharged through the through hole at the upper part of the valve rod 1, the valve plate 12 and the hydraulic cylinder 9 move downwards to a full-open stroke position, and external gas enters the lower side of the valve plate through the vent hole on the valve body 3 and the opening of the valve plate 3 along the directions of a dotted line and an arrow in the drawing, so that the aim of supplementing a large amount of gas is fulfilled.
As shown in fig. 4, after the vacuum degree of the lower part of the valve plate 12 is reduced to a certain extent, hydraulic oil at the lower part of the hydraulic cylinder 9 enters the upper cavity of the hydraulic cylinder 9 through the lower through hole of the valve rod 1, gas in the hydraulic cylinder 9 is sucked through the upper through hole of the valve rod 1, the valve plate 12 and the hydraulic cylinder 9 move upwards to a middle stroke position, external gas enters the lower side of the valve plate 12 along the direction of a dotted line and an arrow in the drawing through the vent hole on the valve body 3 and the opening of the valve plate 12, the air supplementing amount is reduced at the moment, when the valve plate 12 moves upwards to be close to the full closing, the throttle valve 18 at the bottom of the lower cylinder cover 15 stretches into the through hole at the bottom of the valve rod 1, the flow area is reduced, the speed of the hydraulic oil flowing to the upper cavity is reduced, the moving speed of the valve plate 12 is further reduced, and the purpose of reducing metal impact between the valve plate 12 and the sealing surface of the valve body 3 is achieved.
It should be noted that: the above description is only of the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention at a time. Any modification, equivalent replacement, improvement, etc. which are within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a no leakage hydraulic pressure buffering vacuum damages air compensating valve, it comprises valve rod (1), valve body (3), support cover (4), upper cylinder cap (5), valve rod axle bush (6), valve rod seal (7), pneumatic cylinder (9), buffer board (10), valve plate (12), clamp plate (13), main seal (14), lower cylinder cap (15), guiding band (16), piston seal (17), choke valve (18) part, characterized by: the upper end of the valve rod (1) is provided with an air inlet and an air outlet, the bottom end of the valve rod (1) is provided with an oil through hole, the middle part of the valve rod (1) is provided with a boss, a buffer plate (10) is arranged on the boss, an air through channel and an oil through channel are arranged in the valve rod (1), the valve rod (1) is fixedly connected with the valve body (3) through a nut (2), the lower end of the valve rod (1) and a spring (8) are arranged in a hydraulic cylinder (9), two sides of the lower end of the valve rod (1) are connected with the hydraulic cylinder (9) through guide belts (16) and piston seals (17), the valve body (3) is fixedly connected with a supporting sleeve (4) through bolts, an upper cylinder cover (5) and a valve rod bearing bush (6) are arranged at the upper end of the hydraulic cylinder (9), valve rod seals (7), and pneumatic cylinder (9) lower extreme is provided with cylinder cap (15), and cylinder cap (15) lower extreme is provided with choke valve (18) down, and pneumatic cylinder (9) are connected with support sleeve (4) through cylinder body axle bush (11), and pneumatic cylinder (9) are connected with valve plate (12) through the bolt, are provided with main seal (14), clamp plate (13) on valve plate (12), and pneumatic cylinder (9), cylinder cap (5), cylinder cap (15), annex pass through bolt and valve plate (12) assemble in an organic wholely, are axial displacement part.
2. The leak-free hydraulic cushion vacuum break make-up valve of claim 1, wherein: the sliding seal between the bottom end of the valve rod (1) and the hydraulic cylinder (9) is positioned in a hydraulic buffer cavity formed by the hydraulic cylinder (9), the upper cylinder cover (5) and the lower cylinder cover (15).
3. The leak-free hydraulic cushion vacuum break make-up valve of claim 1, wherein: the lower end of the lower cylinder cover (15) is provided with a throttle valve (18), when the valve is closed to be close to the fully closed position, the throttle valve (18) stretches into an oil through hole at the bottom end of the valve rod (1), the speed of the valve plate (12) is reduced, and the metal impact between the valve plate (12) and the valve body (3) is lightened.
4. The leak-free hydraulic cushion vacuum break make-up valve of claim 1, wherein: when the valve plate (12) is opened and closed, gas in the hydraulic cylinder (9) is sucked and discharged through the air inlet and outlet holes at the upper part of the valve rod (1).
5. The leak-free hydraulic cushion vacuum break make-up valve of claim 1, wherein: the valve body (3) is in a truncated cone shape, and the conical surface is provided with a vent hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065987.3A CN110056690B (en) | 2018-01-17 | 2018-01-17 | Leakless hydraulic buffer vacuum damage air compensating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065987.3A CN110056690B (en) | 2018-01-17 | 2018-01-17 | Leakless hydraulic buffer vacuum damage air compensating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110056690A CN110056690A (en) | 2019-07-26 |
| CN110056690B true CN110056690B (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810065987.3A Active CN110056690B (en) | 2018-01-17 | 2018-01-17 | Leakless hydraulic buffer vacuum damage air compensating valve |
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| Country | Link |
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| CN (1) | CN110056690B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283586B (en) * | 2020-10-16 | 2022-09-16 | 浙江华龙巨水暖通科技有限公司 | Vacuum breaker for liquid conveying pipeline |
| CN112855949B (en) * | 2021-01-13 | 2022-08-30 | 一重集团大连工程技术有限公司 | Vacuum breaking device for carbon electrode extruder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285495A (en) * | 1977-12-12 | 1981-08-25 | King Ottis W | Safety valve |
| CN201162843Y (en) * | 2008-01-25 | 2008-12-10 | 北京狮岛邦士消防设备有限公司 | Circular current straight-through valve |
| KR20150021165A (en) * | 2013-08-19 | 2015-03-02 | 현대중공업 주식회사 | Hydro-pneumatic type relief valve |
| CN204213428U (en) * | 2014-11-06 | 2015-03-18 | 湖南五凌电力工程有限公司 | A kind of aeration valve |
| CN208011000U (en) * | 2018-01-17 | 2018-10-26 | 秦皇岛森润滋科技有限公司 | A kind of No leakage hydraulic cushion vacuum breaking aeration valve |
-
2018
- 2018-01-17 CN CN201810065987.3A patent/CN110056690B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285495A (en) * | 1977-12-12 | 1981-08-25 | King Ottis W | Safety valve |
| CN201162843Y (en) * | 2008-01-25 | 2008-12-10 | 北京狮岛邦士消防设备有限公司 | Circular current straight-through valve |
| KR20150021165A (en) * | 2013-08-19 | 2015-03-02 | 현대중공업 주식회사 | Hydro-pneumatic type relief valve |
| CN204213428U (en) * | 2014-11-06 | 2015-03-18 | 湖南五凌电力工程有限公司 | A kind of aeration valve |
| CN208011000U (en) * | 2018-01-17 | 2018-10-26 | 秦皇岛森润滋科技有限公司 | A kind of No leakage hydraulic cushion vacuum breaking aeration valve |
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| Publication number | Publication date |
|---|---|
| CN110056690A (en) | 2019-07-26 |
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