CN220134651U - Special control regulating valve - Google Patents
Special control regulating valve Download PDFInfo
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- CN220134651U CN220134651U CN202321460536.2U CN202321460536U CN220134651U CN 220134651 U CN220134651 U CN 220134651U CN 202321460536 U CN202321460536 U CN 202321460536U CN 220134651 U CN220134651 U CN 220134651U
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- valve
- sleeve
- clack
- stage
- valve clack
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- 230000001105 regulatory effect Effects 0.000 title abstract description 12
- 230000006837 decompression Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 25
- 238000004080 punching Methods 0.000 claims description 3
- 241000446313 Lamella Species 0.000 claims 3
- 238000011010 flushing procedure Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000001603 reducing effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- Details Of Valves (AREA)
Abstract
The utility model provides a special control regulating valve, which comprises a valve body, a valve seat, a valve rod, a valve cover and an actuating mechanism, wherein a steam inlet and a steam outlet are formed in the valve body; the outer side of the upper part of the main valve clack is sleeved with a multi-stage sleeve, and a plurality of spiral sleeve inner holes are arranged on each stage of sleeve along the height direction to form multi-stage throttling decompression. The beneficial effects of the utility model are as follows: the multistage throttling decompression is adopted, the first stage decompression is realized through the valve clack, and the multistage sleeve decompression of 3-10 stages is designed according to different differential pressures, so that the differential pressure of each stage of sleeve is controlled to be not more than 1.0MPa, the regulation performance is good, and the noise can be effectively reduced. The inner hole of the sleeve on the sleeve is a spiral hole, so that the throttling and pressure reducing effects are improved, the situation that the medium superheated steam directly faces the auxiliary valve clack is avoided, the stability in the using process is improved, and the flushing of the valve clack is reduced.
Description
Technical Field
The utility model relates to the field of regulating valves, in particular to a special control regulating valve.
Background
With the continuous development of the power generation industry, the unit parameters are higher and higher, the medium inside the equipment is superheated steam with the use temperature of more than 570 ℃ and the working pressure of more than 14MPa, so that the operation safety of the equipment can be ensured, the air is discharged in time, and the valve bears huge pressure difference and temperature difference. When the valve is discharged, the valve is directly connected with the atmosphere, the pressure difference and the temperature difference between the inlet and the outlet of the valve are extremely large, serious washing and discharging noise is generated, and high noise pollution of the environment is brought. For safe use of the header, container and pipeline, it is generally necessary to provide an air exhaust valve as a first safety barrier and a safety valve for overpressure discharge as a second safety barrier. The traditional air exhaust valve is generally in a stop valve mode, and the valve has poor sealing property, short service life, large vibration and high noise due to severe working conditions and severe flushing, and cannot meet the requirement of air exhaust under the condition of high parameters.
The traditional discharge valve has the following defects when the ultra-temperature high-pressure parameter is emptied: 1. because the pressure and the temperature of the superheated steam are high, the discharge process generates noise pollution with high decibel; 2. the valve internal part is washed by high pressure difference, and the parts are damaged, so that long-term use cannot be satisfied; 3. the valve sealing surface is washed to generate defects, so that the sealing performance is poor, even the internal leakage is large, and the sealing effect cannot be achieved.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a special control regulating valve which is used as an air exhaust valve to meet the air exhaust requirement of high-parameter working conditions.
The aim of the utility model is achieved by the following technical scheme. A special control regulating valve comprises a valve body, a valve seat, a valve rod, a valve cover and an actuating mechanism, wherein a steam inlet and a steam outlet are formed in the valve body; the lower part of the main valve clack is provided with a plurality of groups of flow small holes along the height direction, the superheated steam enters the lower cavity of the valve body from the bottom of the valve body, and the first-stage decompression is realized through the flow small holes; the upper outer side of the main valve clack is sleeved with a multi-stage sleeve, the multi-stage sleeve is fixed in the upper cavity of the valve body, a plurality of spiral sleeve inner holes are arranged on each stage of sleeve along the height direction to form multi-stage throttling decompression, and when the main valve clack is opened, flow small holes are communicated with the sleeve inner holes.
Furthermore, the lower end of the valve rod penetrates through the balance hole seat and forms an auxiliary valve clack, a disc spring is arranged on the auxiliary valve clack, the auxiliary valve clack is connected with the inner cavity sealing surface of the main valve clack in a matched mode, and when the auxiliary valve clack is opened, the upper cavity and the lower cavity of the main valve clack are balanced in stress.
Furthermore, the steam inlet is arranged below the steam outlet, the axes of the steam inlet and the steam outlet are arranged in parallel, and the superheated steam flows to the lower inlet and the higher outlet.
Furthermore, the plane of the lower end of the valve seat, which is contacted with the valve body, is of a tooth-shaped structure and forms a tooth-shaped sealing surface, and the tooth-shaped structure forms a pressure relief groove.
Furthermore, the punching direction of the inner hole of the sleeve is the tangential direction of the excircle of the auxiliary valve clack, a spiral hole is formed, and the flow direction of the superheated steam is along the tangential direction of the excircle of the auxiliary valve clack.
The beneficial effects of the utility model are as follows:
(1) The multistage throttling decompression is adopted, the first stage decompression is realized through the valve clack, and the multistage sleeve decompression of 3-10 stages is designed according to different differential pressures, so that the differential pressure of each stage of sleeve is controlled to be not more than 1.0MPa, the regulation performance is good, and the noise can be effectively reduced.
(2) The valve clack designs the combined structure form of main, vice valve clack, and when vice valve clack was opened, the upper and lower chamber atress of main valve clack was balanced, has reduced actuating mechanism thrust.
(3) The inner hole of the sleeve on the sleeve is a spiral hole, so that the throttling and pressure reducing effects are improved, the situation that the medium superheated steam directly faces the auxiliary valve clack is avoided, the stability of the using process is improved, and the flushing of the valve clack is reduced.
(4) The sealing of the single seat is adopted, the flow direction of the medium superheated steam is low, high and low, and in the normal state, the sealing performance can be ensured, the flushing of the medium to the sleeve can be avoided, and the service life of the valve is prolonged.
Drawings
Fig. 1 is a schematic diagram of a front view structure of the present utility model.
Fig. 2 is a schematic structural view of a valve flap and a valve stem portion.
FIG. 3 is a schematic view of a portion of a multi-stage sleeve.
Fig. 4 is a schematic cross-sectional view A-A of fig. 3.
Fig. 5 is an enlarged partial schematic view of fig. 1.
Reference numerals illustrate: the valve comprises a valve body 1, a steam inlet 1-1, a steam outlet 1-2, a valve seat 2, a main valve plate 3, a flow small hole 3-1, a sleeve 4, a sleeve inner hole 4-1, a valve rod 5, a valve cover 6, an actuating mechanism 7, a toothed sealing surface 8, a balance hole seat 9, a disc spring 10 and a secondary valve plate 11.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the embodiments described below or technical features may be arbitrarily combined to form new embodiments.
In order to ensure the operation safety of the gas collecting box, the container and the pipeline system equipment, the utility model provides a special control regulating valve as an air exhaust valve aiming at severe working conditions of large valve pressure difference, serious flushing, poor sealing performance and short service life. According to different differential pressures, 3-10 stages of multistage sleeve decompression is designed, so that the differential pressure of each stage of sleeve is controlled to be not more than 1.0MPa, the inner hole of the sleeve is designed into a spiral hole, the throttling and decompression effects of the valve are improved, the regulating performance is good, and noise can be effectively reduced. The valve body adopts high temperature resistant alloy steel forging, the sleeve, the valve clack and the valve seat also adopt high temperature resistant alloy steel materials, the control and adjustment adopts the remote control of a straight travel intelligent electric actuator, and the valve is suitable for reliable and safe discharge under the working condition of high temperature and high pressure parameters.
As shown in fig. 1-2, the special control regulating valve comprises a valve body 1, a valve seat 2, a valve rod 5, a valve cover 6 and an actuating mechanism 7, wherein a steam inlet 1-1 and a steam outlet 1-2 are formed in the valve body 1, the steam inlet 1-1 is arranged below the steam outlet 1-2, the axes of the steam inlet 1-1 and the steam outlet 1-2 are arranged in parallel, and the superheated steam flows to the lower part, the higher part and the higher part of the superheated steam. The upper end of the valve rod 5 is connected with the actuating mechanism 7, the lower end of the valve rod 5 is connected with the main valve clack 3, the main valve clack 3 and the valve seat 2 adopt conical surface sealing structures, the sealing pair is made of STL hard alloy by overlaying welding, the sealing pair is designed with 3-5 HRC hardness difference, the scouring resistance and the valve sealing performance are improved, and the service life of the valve is prolonged. The valve seat is detachable, which is beneficial to the maintenance of the valve. Lifting the main valve clack 3 along the central line of the valve body 1 to open or cut off a superheated steam passage between the steam inlet 1-1 and the steam outlet 1-2; the lower part of the main valve flap 3 is provided with a plurality of groups of flow small holes 3-1 along the height direction, medium superheated steam enters the lower cavity of the valve body from the bottom of the valve body 1, and the first-stage decompression is realized through the flow small holes 3-1; the multistage sleeve 4 is sleeved on the outer side of the upper part of the main valve flap 3, the valve body adopts a forging low-inlet high-outlet structure, and the multistage sleeve 4 is fixed in the upper cavity of the valve body to prevent the steam from flowing at a high speed to generate oscillation. A plurality of spiral sleeve inner holes 4-1 are arranged on each stage of sleeve 4 along the height direction to form multi-stage throttling decompression, and when the main valve 3 is opened, the flow small holes 3-1 are communicated with the sleeve inner holes 4-1. According to different differential pressures, 3-10 stages of multistage sleeve decompression is designed, so that the differential pressure of each stage of sleeve is controlled to be not more than 1.0MPa, the regulating performance is good, and the noise can be effectively reduced.
As the preferable technical scheme, the lower end of the valve rod 5 passes through the balance hole seat 9 and forms a secondary valve clack 11, a disc spring 10 is arranged on the secondary valve clack 11, the secondary valve clack 11 is connected with the inner cavity sealing surface of the main valve clack 3 in a matched manner, and when the secondary valve clack 11 is opened, the upper cavity and the lower cavity of the main valve clack 3 are balanced in stress. The valve clack designs the structure form of main, vice valve clack, has solved dynamic load balance and leakage rate problem, has reduced actuating mechanism thrust.
As shown in fig. 1-5, the plane of the lower end of the valve seat 2, which is in contact with the valve body 1, is processed into a tooth shape to form a tooth-shaped sealing surface 8, so that the sealing specific pressure can be improved, and meanwhile, the tooth-shaped structure forms a pressure relief groove, which is beneficial to improving the sealing effect between metals.
As shown in fig. 3 and fig. 4, the punching direction of the inner hole 4-1 of the sleeve is tangential to the outer circle of the auxiliary valve clack 11, so as to form a spiral hole, and the flow direction of the superheated steam of the medium is along the tangential direction of the outer circle of the auxiliary valve clack 11, but not perpendicular to the direction of the auxiliary valve clack, so as to achieve the effect of avoiding the direct facing of the medium to the auxiliary valve clack.
In the utility model, the valve body, the valve cover, the valve clack, the valve seat, the sleeve and the valve rod are made of high-quality alloy steel forgings, so that the flushing resistance and the use safety of the valve are improved.
Working principle: when the container and the pipeline system need to discharge the superheated steam, the actuating mechanism 7 on the regulating valve is remotely controlled, and certain control signal quantity is given according to the working condition requirement, so that the push rod of the actuating mechanism pulls the valve clack, and the valve is in an upward opening state. Medium superheated steam enters the lower cavity of the valve body from the bottom of the valve body, and first-stage decompression is realized through uniform small holes on the main valve clack. The second to sixth stages realize the step-by-step adjustable decompression of the multi-stage sleeve through the multi-stage sleeve, and then the multi-stage sleeve is discharged into the atmosphere. According to the requirements of actual working condition parameters, different sleeves are designed according to different pressure differences, so that the air exhaust requirements are realized.
When the valve needs to be closed, the valve rod pushes the main valve clack to move downwards, the main valve clack contacts with the sealing surface of the valve seat until the main valve clack is in a sealing state, the valve rod continues to move downwards, the main valve clack is not displaced and is kept motionless, the valve rod only drives the auxiliary valve clack to overcome the pretightening force of the disc spring, the downward stroke is continued, the auxiliary valve clack is pushed to contact with the sealing surface of the inner cavity of the main valve clack until the auxiliary valve clack is in a closing state, and the valve is in a closing sealing state. When the valve needs to be opened, the valve rod moves upwards, so that the auxiliary valve clack is separated from the sealing surface of the main valve clack, the auxiliary valve clack is opened, the upper cavity and the lower cavity of the main valve clack are stressed in balance, the main valve clack is free from unbalanced force up and down, the valve rod drives the main valve clack to move upwards easily, and the valve is in an opened state.
It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present utility model should fall within the scope of the claims appended hereto.
Claims (5)
1. The utility model provides a special control governing valve, includes valve body (1), disk seat (2), valve rod (5), valve gap (6) and actuating mechanism (7), steam inlet (1-1) and steam outlet (1-2) have been seted up on valve body (1), the upper end of valve rod (5) is connected with actuating mechanism (7), and the lower extreme of valve rod (5) is connected with main valve lamella (3), and main valve lamella (3) and disk seat (2) adopt conical surface seal structure, and main valve lamella (3) are opened or are cut off the superheated steam passageway between steam inlet (1-1) and steam outlet (1-2) along the lift of valve body (1) central line, its characterized in that: the lower part of the main valve flap (3) is provided with a plurality of groups of flow small holes (3-1) along the height direction, superheated steam enters the lower cavity of the valve body from the bottom of the valve body (1), and the first-stage decompression is realized through the flow small holes (3-1); the multi-stage sleeve (4) is sleeved on the outer side of the upper part of the main valve (3), the multi-stage sleeve (4) is fixed in the upper cavity of the valve body, a plurality of spiral sleeve inner holes (4-1) are arranged on each stage sleeve (4) along the height direction to form multi-stage throttling decompression, and when the main valve (3) is opened, the flow small holes (3-1) are communicated with the sleeve inner holes (4-1).
2. The special control regulator valve according to claim 1, wherein: the lower extreme of valve rod (5) passes balanced hole seat (9) to form vice valve clack (11), be provided with dish spring (10) on vice valve clack (11), vice valve clack (11) are connected with main valve clack (3) inner chamber sealing surface cooperation, and when vice valve clack (11) were opened, the upper and lower chamber atress balance of main valve clack (3).
3. The special control regulator valve according to claim 2, wherein: the steam inlet (1-1) is arranged below the steam outlet (1-2), the axes of the steam inlet (1-1) and the steam outlet (1-2) are arranged in parallel, and the superheated steam flows to the lower inlet and the higher outlet.
4. The special control regulator valve according to claim 3, wherein: the plane of the lower end of the valve seat (2) contacted with the valve body (1) is of a tooth-shaped structure and forms a tooth-shaped sealing surface (8), and the tooth-shaped structure forms a pressure relief groove.
5. The special control regulator valve according to claim 4, wherein: the punching direction of the sleeve inner hole (4-1) is the tangential direction of the excircle of the auxiliary valve clack (11), a spiral hole is formed, and the flow direction of the superheated steam is along the tangential direction of the excircle of the auxiliary valve clack (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321460536.2U CN220134651U (en) | 2023-06-09 | 2023-06-09 | Special control regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321460536.2U CN220134651U (en) | 2023-06-09 | 2023-06-09 | Special control regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220134651U true CN220134651U (en) | 2023-12-05 |
Family
ID=88963678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321460536.2U Active CN220134651U (en) | 2023-06-09 | 2023-06-09 | Special control regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220134651U (en) |
-
2023
- 2023-06-09 CN CN202321460536.2U patent/CN220134651U/en active Active
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