CN220039812U - Pneumatic buffer type operation air compensating valve inspection device for hydroelectric generating set - Google Patents
Pneumatic buffer type operation air compensating valve inspection device for hydroelectric generating set Download PDFInfo
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- CN220039812U CN220039812U CN202320789497.4U CN202320789497U CN220039812U CN 220039812 U CN220039812 U CN 220039812U CN 202320789497 U CN202320789497 U CN 202320789497U CN 220039812 U CN220039812 U CN 220039812U
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- compensating valve
- air compensating
- displacement sensor
- generating set
- pneumatic buffer
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- 238000007689 inspection Methods 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 210000001503 joint Anatomy 0.000 claims abstract description 5
- 230000003139 buffering effect Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 230000001502 supplementing effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
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- 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
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The pneumatic buffer type operation air compensating valve inspection device for the hydroelectric generating set comprises an electric hoist, a distance measuring structure, a top structure and a bottom structure, wherein the electric hoist is in hanging and buckling fit with the top structure; the top structure comprises a bearing cross beam, lifting lugs matched with the electric hoist and symmetrically arranged supporting arms are arranged on the bearing cross beam, and a butt joint groove and a second fixing bolt are arranged on the supporting arms; the distance measuring structure comprises a displacement sensor, and two ends of the displacement sensor are respectively connected with the air compensating valve and the air compensating valve disc through connecting frames. By adopting the structure, whether the action of the air compensating valve is normal can be rapidly and effectively detected, the reliable use of the air compensating valve is ensured, the device has a simple integral structure and convenient installation, is suitable for the air compensating valve device similar to a spring to be closed, has strong universality, can improve the inspection efficiency, and saves the inspection time and the inspection cost of the air compensating valve.
Description
Technical Field
The utility model relates to the technical field of inspection of air compensating valves of hydroelectric generating sets, in particular to a pneumatic buffer type operation air compensating valve inspection device of a hydroelectric generating set.
Background
When the hydroelectric generating set operates under non-optimal working conditions, the runner chamber and the draft tube can generate certain vacuum degree, so that cavitation erosion is generated on the overcurrent component, the efficiency of the water turbine is reduced, vibration of each part of the water turbine is increased, and a series of adverse effects are caused. In order to solve the problem, the hydroelectric generating set generally adopts a large-shaft center natural air supplementing scheme to reduce the vacuum degree of the runner chamber when the set operates under a non-optimal working condition, and the air supplementing mode achieves a good effect in the actual operation of a power station and remarkably improves the operation stability of the set.
The air compensating valve is arranged at the top of the air compensating pipe at the center of the large shaft and is a key component of the natural air compensating device at the center of the large shaft. When the unit normally operates, the air compensating valve is in a normally closed state, and when the unit operates and needs air compensation, the valve disc of the air compensating valve overcomes the elasticity of the spring under the action of pressure difference, and the valve disc is opened to supplement air to the draft tube of the unit; after the air supplement is completed, the air-conditioning unit is automatically closed under the action of spring force, so that the safe and stable operation of the whole unit is ensured. When the air supplementing is needed, if the air supplementing valve does not act timely, the vacuum degree of the rotating wheel chamber and the draft tube can be rapidly increased; after the air supplementing is finished, if the air supplementing valve cannot be closed quickly and reliably, downstream tail water flows out from the valve to the top shaft of the generator, and the running safety of the generator set can be seriously affected by the downstream tail water and the generator top shaft, so that the air supplementing valve needs to be checked regularly to check whether the action is normal or not. At present, a quantifiable means for checking the opening force and the stroke of the air compensating valve and a checking method of the pneumatic buffering device are not available. Therefore, the utility model provides the pneumatic buffer type operation air compensating valve checking device which can quickly check the corresponding relation between the opening force and the stroke of the air compensating valve and quantitatively analyze the performance of the air compensating valve, thereby improving the checking precision.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the pneumatic buffer type operation air compensating valve inspection device for the hydroelectric generating set, which can quickly and effectively detect whether the action of the air compensating valve is normal or not and ensure the reliable use of the air compensating valve; the pneumatic buffer of the air compensating valve can be checked to determine whether the performance of the pneumatic buffer of the air compensating valve is reliable when the valve disc is suddenly closed, and whether the valve disc can be closed in place under the condition, so that defects can be found in time, and the air compensating valve can be ensured to safely operate under special working conditions; the high-precision displacement sensor and the force sensor are adopted, so that a data curve can be recorded in real time, the detection accuracy is improved, a relation curve between the opening force and the displacement of the valve disc of the air compensating valve can be manufactured, and a reference is provided for actual operation; the device has the advantages of simple integral structure, convenient installation, suitability for the air compensating valve device similar to the closing of a spring, strong universality, capability of improving the inspection efficiency and saving the inspection time and cost of the air compensating valve.
In order to solve the technical problems, the utility model adopts the following technical scheme: the pneumatic buffer type operation air compensating valve inspection device for the hydroelectric generating set comprises an electric hoist, a distance measuring structure, a top structure and a bottom structure, wherein the electric hoist is in hanging and buckling fit with the top structure;
the top structure comprises a bearing cross beam, lifting lugs matched with the electric hoist and symmetrically arranged supporting arms are arranged on the bearing cross beam, and a butt joint groove and a second fixing bolt are arranged on the supporting arms;
the distance measuring structure comprises a displacement sensor, and two ends of the displacement sensor are respectively connected with the air compensating valve and the air compensating valve disc through connecting frames;
the bottom structure include the chassis, be equipped with a plurality of mounting on the chassis, the chassis is connected with the fixing base through a plurality of third fixing bolt, the fixing base passes through the linking arm and is connected with electromagnet, electromagnet and linking seat magnetism inhale the cooperation, be equipped with on the linking seat with air compensating valve disc complex connection pad, be equipped with a plurality of fourth fixing bolt on the connection pad.
In the preferred scheme, the bearing beam is connected with the supporting arm through a connecting plate, and a first fixing bolt is arranged on the connecting plate.
In a preferred scheme, the fixing seat is connected with the connecting arm through a force sensor.
In a preferred scheme, the displacement sensor and the force sensor are connected with the computer terminal through data wires.
In the preferred scheme, the displacement sensor adopts a straight rod type self-recovery linear displacement sensor.
In the preferred scheme, the force sensor adopts a high-precision column type tension force sensor.
The pneumatic buffer type operation air compensating valve inspection device for the hydroelectric generating set has the following beneficial effects by adopting the structure:
(1) Whether the action of the air compensating valve is normal or not can be rapidly and effectively detected, and the reliable use of the air compensating valve is ensured;
(2) The pneumatic buffer of the air compensating valve can be checked to determine whether the performance of the pneumatic buffer of the air compensating valve is reliable when the valve disc is suddenly closed, and whether the valve disc can be closed in place under the condition, so that defects can be found in time, and the air compensating valve can be ensured to safely operate under special working conditions;
(3) The high-precision displacement sensor and the force sensor are adopted, so that a data curve can be recorded in real time, the detection accuracy is improved, a relation curve between the opening force and the displacement of the valve disc of the air compensating valve can be manufactured, and a reference is provided for actual operation;
(4) The device has the advantages of simple integral structure, convenient installation, suitability for the air compensating valve device similar to the closing of a spring, strong universality, capability of improving the inspection efficiency and saving the inspection time and cost of the air compensating valve.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic top view of the present utility model.
FIG. 3 is a schematic view of the bottom structure and valve disc connection of the present utility model.
Fig. 4 is a schematic view of the bottom structure of the present utility model.
In the figure: the electric hoist 1, the bearing beam 2, the lifting lug 3, the first fixing bolt 4, the connecting plate 5, the supporting arm 6, the butt joint groove 7, the second fixing bolt 8, the connecting frame 9, the displacement sensor 10, the bottom structure 11, the data wire 12, the computer terminal 13, the underframe 14, the fixing piece 15, the third fixing bolt 16, the fixing seat 17, the force sensor 18, the connecting arm 19, the electromagnetic chuck 20, the connecting seat 21, the fourth fixing bolt 22 and the connecting disc 23.
Detailed Description
As shown in fig. 1-4, a pneumatic buffer type operation air compensating valve inspection device of a water turbine generator set comprises an electric block 1, a ranging structure, a top structure and a bottom structure 11, wherein the electric block 1 is in hanging and buckling fit with the top structure;
the top structure comprises a bearing beam 2, lifting lugs 3 matched with the electric hoist 1 and symmetrically arranged supporting arms 6 are arranged on the bearing beam 2, and a butt joint groove 7 and a second fixing bolt 8 are arranged on the supporting arms 6;
the distance measuring structure comprises a displacement sensor 10, and two ends of the displacement sensor 10 are respectively connected with the air compensating valve and the air compensating valve disc through a connecting frame 9;
the bottom structure 11 comprises a bottom frame 14, a plurality of fixing pieces 15 are arranged on the bottom frame 14, the bottom frame 14 is connected with a fixing seat 17 through a plurality of third fixing bolts 16, the fixing seat 17 is connected with an electromagnetic chuck 20 through a connecting arm 19, the electromagnetic chuck 20 is magnetically matched with a connecting seat 21, a connecting disc 23 matched with a valve disc of an air compensating valve is arranged on the connecting seat 21, and a plurality of fourth fixing bolts 22 are arranged on the connecting disc 23.
In a preferred scheme, the bearing beam 2 is connected with the supporting arm 6 through a connecting plate 5, and a first fixing bolt 4 is arranged on the connecting plate 5. The disassembly and the assembly are flexible and convenient, and the working efficiency is improved.
In a preferred embodiment, the fixing base 17 is connected to the connecting arm 19 via a force sensor 18. And the device is matched with a displacement sensor to detect the corresponding pulling force of the air compensating valve in the vacuum state, so that the detection is more accurate and reliable.
In a preferred embodiment, the displacement sensor 10 and the force sensor 18 are connected to the computer terminal 13 via a data line 12. The high-precision displacement sensor and the high-precision force sensor are adopted, so that a data curve can be recorded in real time, the detection accuracy is improved, a relation curve between the opening force and the displacement of the valve disc of the air compensating valve can be manufactured, and a reference is provided for actual operation.
In a preferred embodiment, the displacement sensor 10 is a straight rod type self-restoring linear displacement sensor. The measuring precision reaches 0.01 and mm, and the current opening position of the valve disc of the air compensating valve can be displayed in real time.
In a preferred embodiment, the force sensor 18 is a high-precision column-type tension pressure sensor. The measurement accuracy reaches 0.01 and N, and the state of the valve in the inspection is judged according to the force corresponding to the vacuum degree when the air compensating valve actually operates.
The application method of the utility model comprises the following steps:
after the air compensating valve checking device is installed, the electromagnetic chuck 20 is kept in an open state, the air compensating valve is lifted upwards through the electric hoist 1 (or a chain block, etc.), if the air compensating valve works normally, the air compensating valve disc is opened under the pulling force corresponding to the designed opening vacuum degree, and at the moment, the number of the displacement sensor 10 starts to change;
when the value of the force sensor 18 reaches a force value corresponding to the vacuum level at the time of full opening of the valve disc, the value of the displacement sensor 10 at this time is the valve disc design maximum stroke. When the pneumatic buffering device of the air compensating valve needs to be checked, the connection seat 21 and the electromagnetic chuck 20 are disconnected by cutting off the power supply of the electromagnetic chuck 20, and the air compensating valve disc is gradually closed under the elastic force of the spring in the air compensating valve and the buffering action of the air buffer. The whole checking process is recorded in the computer terminal 13 and forms a graph, so that whether the performance of the air compensating valve is reliable can be accurately analyzed and judged.
The utility model has the beneficial effects that: whether the action of the air compensating valve is normal or not can be rapidly and effectively detected, and the reliable use of the air compensating valve is ensured; the pneumatic buffer of the air compensating valve can be checked to determine whether the performance of the pneumatic buffer of the air compensating valve is reliable when the valve disc is suddenly closed, and whether the valve disc can be closed in place under the condition, so that defects can be found in time, and the air compensating valve can be ensured to safely operate under special working conditions; the high-precision displacement sensor and the force sensor are adopted, so that a data curve can be recorded in real time, the detection accuracy is improved, a relation curve between the opening force and the displacement of the valve disc of the air compensating valve can be manufactured, and a reference is provided for actual operation; the device has the advantages of simple integral structure, convenient installation, suitability for the air compensating valve device similar to the closing of a spring, strong universality, capability of improving the inspection efficiency and saving the inspection time and cost of the air compensating valve.
Claims (6)
1. The utility model provides a hydroelectric set pneumatic buffering formula operation air compensating valve verifying attachment, includes electric block (1), range finding structure, top structure and bottom structure (11), its characterized in that: the electric hoist (1) is matched with the hanging buckle of the top structure;
the top structure comprises a bearing cross beam (2), lifting lugs (3) matched with the electric hoist (1) and symmetrically arranged supporting arms (6) are arranged on the bearing cross beam (2), and a butt joint groove (7) and a second fixing bolt (8) are arranged on the supporting arms (6);
the distance measuring structure comprises a displacement sensor (10), and two ends of the displacement sensor (10) are respectively connected with the air compensating valve and the air compensating valve disc through a connecting frame (9);
the bottom structure (11) include chassis (14), be equipped with a plurality of mounting (15) on chassis (14), chassis (14) are connected with fixing base (17) through a plurality of third fixing bolt (16), fixing base (17) are connected with electromagnet (20) through linking arm (19), electromagnet (20) are inhaled the cooperation with connecting seat (21) magnetism, be equipped with on connecting seat (21) with air compensating valve disc complex connection pad (23), be equipped with a plurality of fourth fixing bolt (22) on connection pad (23).
2. The device for testing a pneumatic buffer type operation air compensating valve of a hydroelectric generating set according to claim 1, wherein the device comprises: the bearing cross beam (2) is connected with the supporting arm (6) through the connecting plate (5), and the connecting plate (5) is provided with a first fixing bolt (4).
3. The device for testing a pneumatic buffer type operation air compensating valve of a hydroelectric generating set according to claim 1, wherein the device comprises: the fixing seat (17) is connected with the connecting arm (19) through the force sensor (18).
4. The device for testing a pneumatic buffer type operation air compensating valve of a hydroelectric generating set according to claim 1, wherein the device comprises: the displacement sensor (10) and the force sensor (18) are connected with the computer terminal (13) through the data line (12).
5. The device for testing a pneumatic buffer type operation air compensating valve of a hydroelectric generating set according to claim 1, wherein the device comprises: the displacement sensor (10) adopts a straight rod type self-recovery linear displacement sensor.
6. A hydro-generator set pneumatic buffer operated air make-up valve inspection device according to claim 3, wherein: the force sensor (18) adopts a high-precision column type tension pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320789497.4U CN220039812U (en) | 2023-04-11 | 2023-04-11 | Pneumatic buffer type operation air compensating valve inspection device for hydroelectric generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320789497.4U CN220039812U (en) | 2023-04-11 | 2023-04-11 | Pneumatic buffer type operation air compensating valve inspection device for hydroelectric generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220039812U true CN220039812U (en) | 2023-11-17 |
Family
ID=88734968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320789497.4U Active CN220039812U (en) | 2023-04-11 | 2023-04-11 | Pneumatic buffer type operation air compensating valve inspection device for hydroelectric generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220039812U (en) |
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2023
- 2023-04-11 CN CN202320789497.4U patent/CN220039812U/en active Active
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