CN215861845U - Large-scale gulp valve - Google Patents
Large-scale gulp valve Download PDFInfo
- Publication number
- CN215861845U CN215861845U CN202122145959.2U CN202122145959U CN215861845U CN 215861845 U CN215861845 U CN 215861845U CN 202122145959 U CN202122145959 U CN 202122145959U CN 215861845 U CN215861845 U CN 215861845U
- Authority
- CN
- China
- Prior art keywords
- valve
- area
- air
- gulp
- scale
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The utility model discloses a large-scale air compensating valve, which comprises a valve seat with a valve cavity penetrating through two ends, wherein one end of the valve seat is connected with one end of a hollow rotating shaft exposed out of air, a pressure bearing plate is arranged in the valve cavity and divides the valve cavity into a first area connected with the rotating shaft and a second area far away from the rotating shaft, a plurality of balance through holes penetrating through the first area and the second area are arranged on the pressure bearing plate at intervals, a diaphragm type air distributing and compensating valve is arranged at the second area of the balance through holes, and when the air pressure of the first area is higher than that of the second area, the air distributing and compensating valve is in a cut-off state; when the air pressure of the first area is lower than that of the second area, the branch gulp valve is in a conducting state. The utility model can not only improve the reliability of the action, but also obviously reduce the noise during air supplement and effectively avoid the water leakage phenomenon.
Description
Technical Field
The utility model relates to the technical field of fluid machinery and energy engineering equipment, in particular to a large-scale air compensating valve for a water turbine.
Background
With the enhancement of energy conservation and environmental protection awareness of people, wind power generation, solar power generation and hydroelectric power generation which are clean energy sources are being vigorously developed. At present, hydroelectric power generation is also the main clean energy source. It is known that the aeration valve is an important component of the water turbine. The hydraulic turbine usually includes the pivot, and the one end of pivot is equipped with the runner that is located rivers, when rivers drive rotation rotates, can drive the pivot and rotate, and then drive the generator electricity generation. When the rotating shaft of the water turbine rotates at a high speed, negative pressure or low pressure occurs at the rotating wheel, and water flow of the water turbine forms vortex, so that vibration of a unit is increased, and safe and stable operation of the unit is endangered.
In the prior art, the air compensating valve has two main structures of a diaphragm type and a spring type, wherein the diaphragm type air compensating valve is suitable for small pipe diameters with the pipe diameter below 250mm, and the spring type air compensating valve is usually adopted when the pipe diameter is large pipe diameter with the pipe diameter above 250 mm. The existing diaphragm type air compensating valve comprises a valve casing connected to a pipeline, an elastic diaphragm is arranged in the valve casing, and an air compensating hole is formed in one side of the valve casing. When the air pressure at one side of the valve shell is higher than the air pressure at the other side of the valve shell, the elastic membrane elastically deforms to be attached to the air supply hole, the air supply valve is in a cut-off state at the moment, and the air pressures at the two sides of the air supply valve are maintained in an original state; when the air pressure at one side of the valve casing is lower than the air pressure at the other side, the elastic membrane elastically deforms and leaves the air supply hole, the air supply valve is in a conducting state at the moment, and the air pressures at the two sides of the air supply valve are kept balanced.
It can be understood that the diaphragm type gulp valve has low noise and good reliability when in action because the action element is an elastic diaphragm, and cannot be used in the occasions with large pipe diameters because of the limitation of the size of the elastic diaphragm.
At present, most of the gulp valves suitable for large pipe diameters adopt spring type, floating ball type or spring floating ball type, and the phenomena of spring clamping stagnation, floating ball non-floating and the like are easy to occur, so that the reliability is low, the noise ratio is high during gas supply, the problem of water leakage is easy to occur, and the factory building accident is flooded in water when the gas supply is serious.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a large-scale air compensating valve which can improve the action reliability, remarkably reduce the noise during air compensation and effectively avoid water leakage.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a large-scale gulp valve, including having the valve base which link up the valve pocket of both ends, one end of valve base is exposed to the end in the air with the hollow spindle and connected, there are bearing plates in the valve pocket, the said bearing plate divides the valve pocket into the first area to connect spindle, keep away from the second area of the spindle, there are several balancing through holes to link up the first area and second area on the bearing plate at intervals, there are diaphragm type that divide the gulp valve at the second area in the balancing through hole, when the atmospheric pressure of the first area is higher than the atmospheric pressure of the second area, divide the gulp valve to be in the cut-off state; when the air pressure of the first area is lower than that of the second area, the branch gulp valve is in a conducting state.
As described in the background art, the diaphragm type gulp valve has the characteristics of low noise and good reliability. Therefore, the utility model arranges a bearing plate in the valve cavity of a valve seat and arranges a plurality of diaphragm type branch air valves on the bearing plate. Therefore, when the air pressure of a first area formed by the outer bearing plate in a separating mode is higher than that of a second area, the air distribution and compensation valve is in a cut-off state, the air in the first area cannot be discharged outwards through the air distribution and compensation valve, and correspondingly, the other end of the main shaft immersed in the water flow cannot suck the water flow reversely and is discharged outwards through the air compensation valve, so that the water leakage phenomenon is prevented; when the other end of the main shaft immersed in the water flow forms negative pressure, the air pressure of the first area is lower than that of the second area, the sub-air-compensating valve is in a conducting state at the moment, and the second area communicated with the outside air can enable the air to enter the second area through the sub-air-compensating valve until the air enters the other end of the main shaft for air compensation.
In particular, the utility model arranges a plurality of sub-air-supplying valves in a large valve seat, thereby not only fully meeting the air-supplying requirement of the water turbine, but also effectively improving the reliability of the air-supplying valves. It will be appreciated that even if individual sub-gulp valves fail, they will not cause the entire gulp valve to fail to replenish air and "shut down". In addition, because the air supplement of the utility model is completed by a plurality of sub-air supplement valves, it can be understood that all the sub-air supplement valves are not switched on or switched off at the same moment, therefore, compared with a single air supplement valve, the air supplement process is more moderate, and the problem of 'emergency stop and emergency open' is avoided.
Preferably, one end of the valve cavity, which is far away from the hollow rotating shaft, is provided with a top cover, and a gas passing gap is arranged between the top cover and the valve cavity.
The top cover is arranged at one end of the valve cavity far away from the hollow rotating shaft, so that even if part of water flow of the main shaft reversely flows out through the air compensating valve, the water flow is shielded by the top cover, and the air passing gap arranged between the top cover and the valve cavity can ensure the normal air compensation of the air compensating valve.
Preferably, the top cover is fixedly connected with the valve seat through the fixing column, one end of the fixing column is in threaded connection with the edge of the valve seat, the other end of the fixing column is provided with a reduced threaded section, so that a step is formed between the threaded section and the fixing column, the top cover is provided with a connecting hole sleeved on the threaded section, so that the top cover is positioned at the step, and the threaded section extending out of the connecting hole is provided with a fixing nut.
The threaded section is arranged on the fixed column, so that a step for supporting the top cover is formed, an accurate air passing gap is formed between the top cover and the valve cavity, and the top cover is convenient to assemble.
Preferably, the branch gulp valve includes conical hourglass shape valve casing, pastes the conical elastic diaphragm who sets up on the valve casing inside wall that leans on, is equipped with a plurality of gulp holes on the valve casing.
It should be noted that the elastic membrane in the existing membrane type gulp valve is usually a plane circular sheet, and the conical funnel-shaped valve casing of the present invention can increase the surface area of the valve casing to the maximum extent, and then increase the number of the gulp holes, so as to facilitate the rapid and sufficient gas supply, and at the same time, the increase of the external dimension of the component gulp valve is not caused, so that a plurality of sub gulp valves are arranged on the pressure bearing plate as much as possible. In addition, the elastic membrane can be matched in the valve shell, so that when the air distribution and compensation valve is in a cut-off state, the elastic membrane is tightly attached to the inner side wall of the valve shell under the action of air pressure so as to seal the air compensation hole. That is, the elastic diaphragm at this time hardly needs to be deformed. When the sub-aeration valve is in a conduction state, the elastic membrane can leave the inner side wall of the valve shell under the action of air pressure, so that a gap is formed between the elastic membrane and the inner side wall of the valve shell, and the aeration hole is in the conduction state at the moment. That is to say, this scheme both made things convenient for the assembly positioning of elastic diaphragm in the valve casing, the branch gulp valve of being convenient for again makes a round trip to change between the off-state and the on-state.
Preferably, the pressure plate is arranged in the second area close to the bearing plate, a pressing hole corresponding to the balance through hole is formed in the pressure plate, the small end of the valve casing penetrates through the pressing hole, a flange extending in the radial direction is arranged at the large end of the valve casing, the large end of the valve casing covers the corresponding balance through hole, and the flange is pressed between the pressure plate and the bearing plate.
In this scheme, the main aspects of valve casing is equipped with the flange limit to the flange limit is by the crimping between clamp plate and bearing plate, has both made things convenient for the assembly of branch tonifying qi valve, is favorable to dividing the seal installation of tonifying qi valve again, avoids appearing the phenomenon of leaking.
Preferably, the small end of the valve casing is provided with a connecting pin, one end of the connecting pin penetrating through the valve casing is embedded in the small end of the elastic diaphragm, and one end of the connecting pin extending out of the valve casing is provided with a fixing nut.
When the sub-air-replenishing valve needs to be assembled, the elastic membrane is only required to be arranged in the valve shell, the connecting pin of the small end of the elastic membrane penetrates out of the small end of the valve shell, and the connecting pin is only required to be fixed by the fixing nut, so that the assembly of the sub-air-replenishing valve can be completed.
It should be noted that, the small end of the valve housing needs to be provided with a corresponding connecting pin through hole, so that the connecting pin can penetrate through the small end of the valve housing. In addition, the difference of 0.035-0.039 is formed between the taper of the elastic diaphragm and the taper of the inner cavity of the valve casing, and the outer diameter of the large end of the elastic diaphragm is matched with the inner diameter of the large end of the inner cavity of the valve casing, so that a gap which gradually increases from the large end to the small end can be formed between the elastic diaphragm and the inner cavity of the valve casing. Because the main end external diameter of elastic diaphragm and the main end internal diameter phase-match of valve casing inner chamber, consequently, when the atmospheric pressure in first region was higher than in the second region, can ensure that elastic diaphragm pastes the valve casing inside wall, avoids gaseous cooperation clearance between elastic diaphragm main end and the valve casing inner chamber to flow through.
Therefore, the utility model has the following beneficial effects: not only can improve the reliability of the action, but also can obviously reduce the noise during air supplement, and can effectively avoid the water leakage phenomenon.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a schematic diagram of a structure of the branch aeration valve.
In the figure: 1. the main shaft 2, the valve seat 21, the valve cavity 211, the first area 212, the second area 3, the pressure-bearing plate 31, the balance through hole 4, the air distribution and compensation valve 41, the valve shell 411, the air compensation hole 412, the flange edge 42, the elastic membrane 43, the connecting pin 5, the top cover 51, the air passing gap 6, the fixing column 61, the fixing nut 7, the pressure plate 71 and the compression joint hole.
Detailed Description
The utility model is further described with reference to the following detailed description and accompanying drawings.
As shown in fig. 1 and 2, the large-scale gulp valve is suitable for the air supplement of one end of a main shaft of a large-scale hydro-generator, which is positioned in water flow, namely, the main shaft is a hollow shaft, and the large-scale gulp valve is arranged at the other end of the main shaft, which is positioned in air. Specifically, large-scale gulp valve includes disk seat 2, is equipped with the valve pocket 21 that link up both ends in the disk seat, and disk seat one end is connected with the one end that hollow rotating shaft 1 exposes out in the air, transversely is equipped with pressure-bearing plate 3 in the valve pocket, pressure-bearing plate divides the valve pocket into the first region 211 of connecting the rotating shaft, keeps away from the second region 212 of rotating shaft, is equipped with a plurality of balanced logical 31 that link up first region and second region on pressure-bearing plate at the interval, is equipped with diaphragm formula branch gulp valve 4 in balanced through-hole position second region department, that is to say, branch gulp valve be located the second region. When the air pressure of the first area is higher than that of the second area, the branch air compensation valve is in a cut-off state; when the air pressure of the first area is lower than that of the second area, the branch gulp valve is in a conducting state.
The utility model arranges a bearing plate in the valve cavity of the valve seat, and arranges a plurality of diaphragm type branch air valves on the bearing plate. Therefore, when the air pressure of a first area formed by the outer bearing plate in a separating mode is higher than that of a second area, the air distribution and compensation valve is in a cut-off state, the air in the first area cannot be discharged outwards through the air distribution and compensation valve, and correspondingly, the other end of the main shaft immersed in the water flow cannot suck the water flow reversely and is discharged outwards through the air compensation valve, so that the water leakage phenomenon is prevented; when the other end of the main shaft immersed in the water flow forms negative pressure, the air pressure of the first area is lower than that of the second area, the sub-air-compensating valve is in a conducting state at the moment, and the second area communicated with the outside air can enable the air to enter the second area through the sub-air-compensating valve until the air enters the other end of the main shaft for air compensation.
The diaphragm type gulp valve has the characteristics of low noise and good reliability. Therefore, the large-scale gulp valve of the utility model has the characteristics of low noise and good reliability.
In particular, the utility model arranges a plurality of sub-air-compensating valves in a large valve seat, thereby fully meeting the air-compensating requirement of the water turbine. It will be appreciated that even if individual sub-gulp valves fail, they will not cause the entire gulp valve to fail to replenish air and "shut down". That is, the large-scale air compensation valve is at most the 'discounted' air compensation amount. In addition, because all the sub-aeration valves are arranged on the pressure bearing plate at different positions, the performances of the elastic membranes are slightly different, so that all the sub-aeration valves are not switched on or switched off at the same moment, compared with a single aeration valve, the aeration process is more moderate, and the problem of 'emergency stop and emergency opening' is avoided.
In addition, a top cover 5 can be arranged at one end of the valve cavity far away from the hollow rotating shaft, and the top cover is arranged separately from the valve cavity, so that a gas passing gap 51 is formed between the top cover and the valve cavity. Therefore, even if part of water flow of the main shaft reversely flows out through the air compensating valve, the water flow which reversely flows out can be shielded by the top cover, the water flow is prevented from being sprayed out, and the air passing gap formed between the top cover and the valve cavity can ensure the normal air compensation of the air compensating valve.
In order to facilitate the assembly of the top cover, the top cover is fixedly connected with the valve seat through 6-8 fixing columns 6 arranged on the edge of the valve seat, one ends of the fixing columns are in threaded connection with the edge of the valve seat, the other ends of the fixing columns are provided with reduced threaded sections, so that steps are formed between the threaded sections and the fixing columns, the top cover is provided with connecting holes sleeved on the threaded sections, the top cover is positioned at the steps, and the threaded sections extending out of the connecting holes are provided with fixing nuts 61. That is, the length of the fixing post determines the size of the air gap.
As shown in fig. 3, the gas distribution and compensation valve preferably includes a conical funnel-shaped valve housing 41, a conical elastic diaphragm 42 attached to an inner side wall of the valve housing, and a plurality of gas compensation holes 411 provided at intervals in the valve housing. Conical hourglass shape valve casing can furthest's increase valve casing the surface area, increase the quantity of tonifying qi hole then to be favorable to quick and abundant tonifying qi, can not make composition tonifying qi valve overall dimension's increase simultaneously, so that set up a plurality of branch tonifying qi valves as far as possible on the bearing plate.
In addition, the elastic membrane can be matched in the valve shell, so that when the air distribution and compensation valve is in a cut-off state, the elastic membrane is tightly attached to the inner side wall of the valve shell under the action of air pressure so as to seal the air compensation hole. That is, the elastic diaphragm at this time hardly needs to be deformed. When the sub-aeration valve is in a conduction state, the elastic membrane can leave the inner side wall of the valve shell under the action of air pressure, so that a gap is formed between the elastic membrane and the inner side wall of the valve shell, and the aeration hole is in the conduction state at the moment. That is to say, this scheme both made things convenient for the assembly positioning of elastic diaphragm in the valve casing, the branch gulp valve of being convenient for again makes a round trip to change between the off-state and the on-state.
Furthermore, a pressing plate 7 close to the bearing plate is further arranged in the valve seat, the pressing plate is located on one side of the second area, a pressing hole 71 corresponding to the balance through hole in the bearing plate is formed in the pressing plate, a valve shell large end cover of the sub-aeration valve is arranged on the corresponding balance through hole, and a valve shell small end penetrates through the pressing hole. In addition, the big end of valve casing is equipped with radially extending's flange limit 412, and the flange limit is pressed joint between clamp plate and bearing plate, has both made things convenient for the assembly of branch gulp valve, is favorable to the seal installation of branch gulp valve again, avoids appearing leaking the phenomenon. Of course, a corresponding sealing ring can be arranged between the flange edge and the bearing plate to ensure the sealing performance between the branch aeration valve and the balance through hole of the bearing plate.
Furthermore, the small end of the valve casing is provided with a connecting pin 43, the connecting pin penetrates through the inner end of the valve casing and is embedded in the small end of the elastic diaphragm, and the outer end of the connecting pin extending out of the valve casing is provided with a fixing nut.
When the sub-air-replenishing valve needs to be assembled, the elastic membrane is only required to be arranged in the valve shell, the connecting pin of the small end of the elastic membrane penetrates out of the small end of the valve shell, and the connecting pin is only required to be fixed by the fixing nut, so that the assembly of the sub-air-replenishing valve can be completed.
It should be noted that, we need to set up the corresponding connecting pin through hole in the fragrant satin of valve casing to the connecting pin is worn out the valve casing tip. In addition, we can make the conicity of the elastic diaphragm larger than that of the valve casing inner cavity, thereby forming a difference of 0.035-0.039, and make the outer diameter of the large end of the elastic diaphragm match with the inner diameter of the large end of the valve casing inner cavity, thereby forming a gap between the elastic diaphragm and the valve casing inner cavity which gradually increases from the large end to the small end. Because the main end external diameter of elastic diaphragm and the main end internal diameter phase-match of valve casing inner chamber, consequently, when the atmospheric pressure in first region was higher than in the second region, can ensure that elastic diaphragm pastes the valve casing inside wall, avoids gaseous cooperation clearance between elastic diaphragm main end and the valve casing inner chamber to flow through.
It should be noted that, we can make the pressure plate and the pressure-bearing plate fixedly connected by the fastening screw arranged between the branch aeration valves, and set the heightening sleeve between the fastening screw and the pressure plate to facilitate the fastening of the fastening screw.
Claims (6)
1. A large-scale gulp valve, including having the valve base which link up the valve pocket of both ends, one end of valve base is exposed to the end in the air with the hollow spindle and connected, characterized by, there are bearing plates in the valve pocket, the said bearing plate divides the valve pocket into the first area connecting spindle, second area far away from spindle, there are several balancing through holes to link up first area and second area on the bearing plate at intervals, there are membrane type that divide the gulp valve at the second area in the balancing through hole, when the atmospheric pressure of the first area is higher than the atmospheric pressure of the second area, divide the gulp valve in the off state; when the air pressure of the first area is lower than that of the second area, the branch gulp valve is in a conducting state.
2. The large-scale gulp valve of claim 1 wherein, the valve chamber is provided with a top cover at the end far away from the hollow rotating shaft, and a gas gap is arranged between the top cover and the valve chamber.
3. A large-scale aeration valve according to claim 2, characterized in that the top cover is fixedly connected with the valve seat through fixing posts, one end of each fixing post is connected with the edge of the valve seat in a threaded mode, the other end of each fixing post is provided with a reduced threaded section, so that a step is formed between the threaded section and the fixing post, the top cover is provided with a connecting hole which is sleeved on the threaded section, so that the top cover is positioned at the step, and the threaded section extending out of the connecting hole is provided with a fixing nut.
4. The large-scale gulp valve of claim 1 wherein, the branch gulp valve includes conical funnel-shaped valve casing, leans on the conical elastic diaphragm who sets up on the valve casing inside wall, is equipped with a plurality of gulp holes on the valve casing.
5. A large-scale gulp valve according to claim 4, characterized by still including being close to the pressure-bearing plate and setting up the clamp plate in the second area, be equipped with the crimping hole corresponding with balanced through-hole on the clamp plate, the little end of valve casing passes the crimping hole, the big end of valve casing is equipped with the flange limit of radial extension, the big end cover of valve casing is established on corresponding balanced through-hole, the flange limit crimping is between clamp plate and pressure-bearing plate.
6. A large-scale gulp valve according to claim 4, characterized in that the small end of valve casing is equipped with connecting pin, the end of connecting pin that passes through the valve casing is embedded in the small end of elastic diaphragm, and the end of connecting pin that stretches out of valve casing is equipped with fixation nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122145959.2U CN215861845U (en) | 2021-09-06 | 2021-09-06 | Large-scale gulp valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122145959.2U CN215861845U (en) | 2021-09-06 | 2021-09-06 | Large-scale gulp valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215861845U true CN215861845U (en) | 2022-02-18 |
Family
ID=80256984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122145959.2U Active CN215861845U (en) | 2021-09-06 | 2021-09-06 | Large-scale gulp valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215861845U (en) |
-
2021
- 2021-09-06 CN CN202122145959.2U patent/CN215861845U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215861845U (en) | Large-scale gulp valve | |
| CN201014003Y (en) | Automatic regulation float ball valve | |
| CN205479444U (en) | Forge unsteady ball valve of ultra -low temperature upper assembling type of valve body | |
| CN201396474Y (en) | Normal-closed electromagnetic valve | |
| CN111043351B (en) | Ultralow-temperature low-flow-resistance self-maintaining two-position three-way stop valve | |
| CN102853155B (en) | Adjustable pressure reducing valve with high pressure reducing ratio | |
| CN2806804Y (en) | Pipe type hydraulic turbine | |
| CN201787159U (en) | Intelligent micro electric controllable valve | |
| CN204114273U (en) | Adjustable differential pressure balancing valve | |
| CN202834264U (en) | Adjustable pressure reducing valve with high pressure reducing ratio | |
| CN201575207U (en) | Constant pressure valve | |
| CN201991674U (en) | Water guide device for hydroelectric power generation | |
| CN214660933U (en) | High-efficient throttle pump | |
| CN210920632U (en) | Wind turbine generator system ultrasonic wave anemoscope fixing device | |
| CN220081733U (en) | Novel bulb tubular pump semi-packing type sealing device | |
| CN220185932U (en) | Novel slow-closing check valve | |
| CN202301974U (en) | Hydraulic control valve with filtering device | |
| CN216306045U (en) | Exhaust valve seat of engine | |
| CN220185264U (en) | Water supply circulation system of hydroelectric generating set | |
| CN204704055U (en) | A kind of collet formula spindle end face seals | |
| CN212106107U (en) | Water turbine blade counterweight device | |
| CN2177148Y (en) | Energy saving check valve | |
| CN204493823U (en) | A kind of decompression delivery valve | |
| CN203202022U (en) | High-speed dynamic balance tilting-pad bearing with high-pressure jacking device | |
| CN213541429U (en) | Sealing structure in voltage stabilizing module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |