CN111140664A - Temperature and pressure reducing valve - Google Patents
Temperature and pressure reducing valve Download PDFInfo
- Publication number
- CN111140664A CN111140664A CN202010053262.XA CN202010053262A CN111140664A CN 111140664 A CN111140664 A CN 111140664A CN 202010053262 A CN202010053262 A CN 202010053262A CN 111140664 A CN111140664 A CN 111140664A
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- China
- Prior art keywords
- valve
- pressure
- decompression chamber
- cover
- decompression
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Classifications
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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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
- F16K49/00—Means in or on valves for heating or cooling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The application discloses temperature-reducing and pressure-reducing valve, including the valve casing, be provided with inclosed appearance chamber in the valve casing directly or indirectly, and be provided with on the valve casing with air inlet and gas outlet that hold the chamber and be linked together still include disk seat, throttle sleeve and valve butterfly, disk seat and throttle sleeve all set up and are holding the intracavity, first decompression chamber has been formed between disk seat and the throttle sleeve, second decompression chamber has been formed between throttle sleeve and the valve casing, first decompression chamber is linked together with second decompression chamber, second decompression chamber with the gas outlet communicates with each other, the valve butterfly activity sets up in the disk seat, the disk seat is used for controlling the logical closeness between air inlet and the first decompression chamber. The invention has the following beneficial effects: through the mode of the dilatation of decompression many times, realize final decompression after balanced steady voltage for each part atress is even in the pressure reducing valve, and whole pressure reducing valve keeps steady, and the noise that produces when steam flows is little.
Description
Technical Field
The invention relates to the field of valves, in particular to a temperature and pressure reducing valve.
Background
The temperature and pressure reducing device is a necessary device on industrial steam production equipment, and is an important tool for ensuring the steam quality and the production process performance, but the existing temperature and pressure reducing device has a problem in use, namely, steam is subjected to pressure reduction once in the valve body, the steam flows in the temperature and pressure reducing device to generate larger noise, and meanwhile, the steam flows in the temperature and pressure reducing device to generate larger shaking.
Disclosure of Invention
The invention provides a temperature and pressure reducing valve aiming at the problems.
The technical scheme adopted by the invention is as follows:
the utility model provides a temperature-reducing and pressure-reducing valve, includes the valve casing, be provided with inclosed appearance chamber directly or indirectly in the valve casing, and be provided with on the valve casing with hold air inlet and the gas outlet that the chamber is linked together, still include disk seat, throttle sleeve and valve butterfly, disk seat and throttle sleeve all set up and are holding the intracavity, first decompression chamber has been formed between disk seat and the throttle sleeve, second decompression chamber has been formed between throttle sleeve and the valve casing, first decompression chamber is linked together with second decompression chamber, second decompression chamber with the gas outlet communicates with each other, the activity of valve butterfly sets up in the disk seat, the disk seat is used for controlling the logical closeness between air inlet and the first decompression chamber.
The theory of operation of this device is as follows, at first steam gets into from the air inlet, when steam gets into, air inlet and first decompression chamber are opened to the valve butterfly, make steam get into first decompression chamber from the air inlet and reentry second decompression chamber, leave from the gas outlet after the second decompression chamber again, through the decompression dilatation effect in first decompression chamber and second decompression chamber, realize final decompression after balanced steady voltage, this kind of mode can make each part atress in the pressure reducing valve even, whole pressure reducing valve keeps steadily, and the noise that produces when steam flows is little.
This device realizes final decompression after balanced steady voltage through the mode of decompression dilatation many times for each part atress is even in the pressure reducing valve, and whole pressure reducing valve keeps steady, and the noise that produces when steam flows is little.
Optionally, still include valve gap and valve rod, the valve gap directly or indirectly with valve casing detachably cooperatees together, the valve rod with the valve gap seals sliding fit together, and the valve rod runs through the valve gap, valve rod one end with valve butterfly fixed fit together.
The valve rod is used for driving the valve butterfly to move in the valve seat.
Optionally, the valve butterfly is in sliding sealing fit with the valve seat, and the valve butterfly divides the space in the valve seat into a first cavity and a second cavity which are independent and communicated.
Because the first cavity is communicated with the second cavity, the pressures on two sides of the valve butterfly are equal, the pressures on two sides are balanced when the valve butterfly is closed or adjusted, no resistance exists, and the position of the valve butterfly in the valve seat can be adjusted by overcoming the friction force and the dead weight of the valve rod through the actuator (the valve butterfly adjusts and controls the opening and closing between the air inlet and the first decompression cavity through the change of the position of the valve butterfly). And because the space in the valve seat is divided into the first cavity and the second cavity which are communicated by the valve butterfly, the steam also passes through once decompression and expansion when entering the valve seat, and the steam equivalently passes through three times of decompression and expansion in the temperature and pressure reducing valve under the action of the first decompression cavity and the second decompression cavity. The noise reduction and stability enhancement effects are better.
Optionally, still include sealing ring and snap ring, the valve gap is installed on the valve casing, the sealing ring sets up between valve gap and valve casing, the snap ring sets up on the valve gap or on the valve casing or between valve gap and the valve casing, the snap ring pastes tightly the sealing ring.
The sealing ring is used for sealing the gap between the valve cover and the valve shell, and the stopping ring is used for preventing the sealing ring from falling off.
Optionally, the throttle valve further comprises a U-shaped spring, and the U-shaped spring is arranged between the throttle sleeve and the valve cover.
The design structure ensures that the larger the steam pressure is, the tighter the U-shaped spring expands, and the better the sealing between the valve cover and the valve butterfly is. It should be noted that the contact mode between the throttling sleeve and the valve cover is flange-type elastic contact.
Optionally, the valve further comprises an actuator, and the actuator is connected with the valve rod through a flexible rod. The actuator is connected with the valve rod through the flexible rod, so that the problems of bending coaxiality of the slender shaft, insufficient rigidity, blocking of the valve rod and the like are solved. The specific actuator is provided with a quick-opening and quick-closing type, and can be pneumatic or electric, and the opening, closing and adjustment of various working conditions can be realized under the instruction of a control system.
Optionally, the hydraulic actuator further comprises a heat dissipation frame, one end of the heat dissipation frame is directly or indirectly fixedly matched with the valve casing, and the other end of the heat dissipation frame is directly or indirectly fixedly matched with the actuator.
Adopt heat dissipation frame connection executor and valve casing, play the heat dissipation effect on one hand, play the fixed effect of connecting on the other hand. The heat dissipation frame has another function of reducing the radiation heat of the valve body surface to the actuator, and simultaneously, the heat dissipation fins are added to block and shield the radiation heat.
Optionally, still include transition flange lid and fin, the transition flange lid is installed on the valve casing, heat dissipation frame one end with transition flange lid fixed fit is in the same place, the fin is installed on transition flange lid.
Optionally, the spray nozzle further comprises a spray pipe, a nozzle and a nozzle holder, wherein the nozzle is mounted on the valve housing through the nozzle, and the nozzle is communicated with the spray pipe through the nozzle pipe.
The effect of above-mentioned structure is to steam water spray, through water spray and steam contact heat exchange desuperheating, adapts to the turbine scram steam cooling operating mode.
Optionally, the pressure reducing device further comprises a pressure reducing orifice plate, the pressure reducing orifice plate is arranged on the valve casing, and the pressure reducing orifice plate is located between the throttling sleeve and the air outlet.
The function of the pressure-reducing orifice plate is to further depressurize the steam.
The invention has the beneficial effects that: through the mode of the dilatation of decompression many times, realize final decompression after balanced steady voltage for each part atress is even in the pressure reducing valve, and whole pressure reducing valve keeps steady, and the noise that produces when steam flows is little.
Description of the drawings:
FIG. 1 is a schematic diagram of a pressure and temperature reducing valve configuration.
The figures are numbered: 1. the valve comprises a valve housing, 101, an air inlet, 102, an air outlet, 2, a valve seat, 201, a first cavity, 202, a second cavity, 301, a first decompression cavity, 302, a second decompression cavity, 4, a bolt, 5, a throttling sleeve, 6, a U-shaped spring, 7, a valve rod, 8, a flexible rod, 9, an actuator, 10, a heat dissipation frame, 11, a heat dissipation fin, 12, a decompression orifice plate, 13, a water spray pipe, 14, a nozzle pipe 15, a nozzle, 16, a nozzle seat, 17, a valve butterfly, 18, a stop ring, 19, a sealing ring, 20, a valve cover, 21 and a transition flange cover 21.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
As shown in the accompanying drawing 1, a temperature-reducing pressure-reducing valve, including valve casing 1, be provided with inclosed appearance chamber in the valve casing 1 directly or indirectly, and be provided with on the valve casing 1 with hold air inlet and the gas outlet that the chamber is linked together, still include valve seat 2, throttle sleeve 5 and valve butterfly 17, valve seat 2 and throttle sleeve 5 all set up in holding the intracavity, first decompression chamber 301 has been formed between valve seat 2 and the throttle sleeve 5, second decompression chamber 302 has been formed between throttle sleeve 5 and the valve casing 1, first decompression chamber 301 is linked together with second decompression chamber 302, second decompression chamber 302 communicates with each other with the gas outlet, valve butterfly 17 activity sets up in valve seat 2, valve seat 2 is used for controlling the logical closure between air inlet and the first decompression chamber 301.
The theory of operation of this device is as follows, at first steam gets into from the air inlet, when steam gets into, air inlet and first decompression chamber 301 are opened to valve butterfly 17, make steam get into first decompression chamber 301 from the air inlet and reentry second decompression chamber 302, leave and leave from the gas outlet after the second decompression chamber 302 again, through the decompression dilatation effect in first decompression chamber 301 and second decompression chamber 302, realize final decompression after the balanced steady voltage, this kind of mode can make each part atress in the pressure reducing valve even, whole pressure reducing valve keeps steadily, and the noise that produces when steam flows is little.
This device realizes final decompression after balanced steady voltage through the mode of decompression dilatation many times for each part atress is even in the pressure reducing valve, and whole pressure reducing valve keeps steady, and the noise that produces when steam flows is little.
As shown in fig. 1, the valve cover 20 and the valve rod 7 are further included, the valve cover 20 is directly and detachably matched with the valve housing 1, the valve rod 7 is in sealing sliding fit with the valve cover 20, the valve rod 7 penetrates through the valve cover 20, and one end of the valve rod 7 is fixedly matched with the valve butterfly 17.
The valve stem 7 functions to drive the valve disc 17 to move within the valve seat 2.
As shown in fig. 1, the valve disc 17 is in sliding and sealing fit with the valve seat 2, and the valve disc 17 divides the space inside the valve seat 2 into a first cavity 201 and a second cavity 202 which are independent and communicated.
Because the first cavity 201 is communicated with the second cavity 202, the pressures on the two sides of the valve butterfly 17 are equal, the pressures on the two sides are balanced when the valve butterfly 17 is closed or adjusted, no resistance exists, and the actuator 9 overcomes the friction force and the self weight of the valve rod 7, namely, the position of the valve butterfly 17 in the valve seat 2 can be adjusted (the valve butterfly 17 adjusts and controls the opening and closing between the air inlet and the first decompression cavity 301 through the change of the position of the valve butterfly 17). And because the space in the valve seat 2 is divided into the first cavity 201 and the second cavity 202 which are communicated by the valve butterfly 17, the steam also passes through the decompression and expansion once when entering the valve seat 2, and the whole gas equivalently passes through the decompression and expansion three times under the action of the first decompression cavity 301 and the second decompression cavity 302. The noise reduction and stability enhancement effects are better.
As shown in fig. 1, the valve cap 20 is mounted on the valve housing 1, the sealing ring 19 is disposed between the valve cap 20 and the valve housing 1, the stop ring 18 is disposed on the valve cap 20 or on the valve housing 1 or between the valve cap 20 and the valve housing 1, and the stop ring 18 is adhered to the sealing ring 19.
The sealing ring 19 functions to seal a gap between the valve cap 20 and the valve housing 1, and the stopping ring 18 functions to prevent the sealing ring 19 from falling off.
As shown in fig. 1, the throttle valve further comprises a U-shaped spring 6, and the U-shaped spring 6 is arranged between the throttle sleeve 5 and the valve cover 20.
The design structure enables the U-shaped spring 6 to expand more tightly as the steam pressure is larger, and the valve cover 20 and the valve butterfly 17 are better sealed. It should be noted that the contact between the throttle sleeve 5 and the valve cover 20 is a flange-type elastic contact.
As shown in fig. 1, the valve further comprises an actuator 9, and the actuator 9 is connected with the valve rod 7 through a flexible rod 8.
The actuator 9 is connected with the valve rod 7 through the flexible rod 8, and the problems that the coaxiality of the slender shaft is bent, the rigidity is insufficient, the valve rod 7 is blocked and the like are solved. The specific actuator 9 is configured with a quick-opening and quick-closing type, and can be pneumatic or electric, and the opening, closing and adjustment of various working conditions can be realized under the instruction of a control system.
As shown in fig. 1, the actuator further includes a heat dissipation frame 10, one end of the heat dissipation frame 10 is fixedly fitted with the valve housing 1, and the other end of the heat dissipation frame 10 is fixedly fitted with the actuator 9.
The heat dissipation frame 10 is adopted to connect the actuator 9 and the valve shell 1, so that the heat dissipation function is achieved on one hand, and the connection and fixation functions are achieved on the other hand. The heat dissipation frame 10 also functions to reduce the radiation heat of the valve body surface to the actuator 9, and the heat dissipation fins 11 are added to block and shield the radiation heat.
As shown in fig. 1, the heat dissipation device further comprises a transition flange cover 21 and a heat dissipation fin 11, wherein the transition flange cover 21 is installed on the valve housing 1 through bolts 4, one end of the heat dissipation frame 10 is fixedly matched with the transition flange cover 21, and the heat dissipation fin 11 is installed on the transition flange cover 21.
As shown in fig. 1, the water spray device further comprises a water spray pipe 13, a nozzle pipe 14, a nozzle 15 and a nozzle holder 16, wherein the nozzle 15 is mounted on the valve housing 1 through the nozzle 15, and the nozzle 15 is communicated with the water spray pipe 13 through the nozzle pipe 14.
The effect of above-mentioned structure is to steam water spray, through water spray and steam contact heat exchange desuperheating, adapts to the turbine scram steam cooling operating mode.
As shown in fig. 1, the valve further comprises a pressure reducing orifice 12, wherein the pressure reducing orifice 12 is arranged on the valve housing 1, and the pressure reducing orifice 12 is positioned between the throttling sleeve 5 and the air outlet.
The function of the pressure-reducing orifice 12 is to further depressurize the steam.
Referring to fig. 1, steam enters from the lower portion of the valve and the valve body is horizontally discharged. Avoiding the steam from horizontally entering the horizontal axial thrust on the valve body. The steam horizontal outlet is designed for the arrangement of 5% inclination of the rear connecting pipeline, so that redundant water in the pipeline can be quickly discharged, and water hammer is avoided.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (10)
1. The utility model provides a temperature-reducing and pressure-reducing valve, includes the valve casing, be provided with directly or indirectly in the valve casing inclosed appearance chamber, and be provided with on the valve casing with hold air inlet and the gas outlet that the chamber is linked together, its characterized in that still includes disk seat, throttle sleeve and valve butterfly, disk seat and throttle sleeve all set up and are holding the intracavity, first decompression chamber has been formed between disk seat and the throttle sleeve, second decompression chamber has been formed between throttle sleeve and the valve casing, first decompression chamber is linked together with second decompression chamber, second decompression chamber with the gas outlet communicates with each other, the valve butterfly activity sets up in the disk seat, the disk seat is used for controlling the logical closure between air inlet and the first decompression chamber.
2. A pressure and temperature reducing valve as claimed in claim 1 further comprising a valve cover and a valve stem, the valve cover being releasably engaged directly or indirectly with the valve housing, the valve stem being sealingly slidably engaged with the valve cover, and the valve stem extending through the valve cover, one end of the valve stem being fixedly engaged with the valve disc.
3. A pressure and temperature reducing valve as claimed in claim 2 wherein the valve disc is in sliding sealing engagement with the valve seat, the valve disc separating the space within the valve seat into separate and communicating first and second chambers.
4. A pressure and temperature reducing valve as claimed in claim 2, further comprising a sealing ring and a stop ring, the valve cover being mounted on the valve housing, the sealing ring being disposed between the valve cover and the valve housing, the stop ring being disposed on the valve cover or on the valve housing or between the valve cover and the valve housing, the stop ring abutting against the sealing ring.
5. A pressure and temperature reducing valve as set forth in claim 2 further comprising a U-shaped spring disposed between a throttling sleeve and said valve cover.
6. A pressure and temperature reducing valve as set forth in claim 2 further comprising an actuator connected to said valve stem by a flexible rod.
7. A pressure and temperature reducing valve as claimed in claim 6 further comprising a heat sink, one end of the heat sink being directly or indirectly fixedly engaged with the valve housing and the other end of the heat sink being directly or indirectly fixedly engaged with the actuator.
8. A pressure and temperature reducing valve as claimed in claim 7, further comprising a transition flange cover mounted to the valve housing, the heat sink frame having one end fixedly engaged with the transition flange cover, and heat sink fins mounted to the transition flange cover.
9. A pressure and temperature reducing valve as claimed in claim 1, further comprising a spray pipe, a nozzle and a nozzle holder, the nozzle being mounted on a valve housing through the nozzle, the nozzle being in communication with the spray pipe through the nozzle pipe.
10. A pressure and temperature reducing valve as set forth in claim 1 further comprising a pressure reducing orifice plate disposed on the valve housing with the pressure reducing orifice plate being located between the throttling sleeve and the outlet port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053262.XA CN111140664A (en) | 2020-01-17 | 2020-01-17 | Temperature and pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053262.XA CN111140664A (en) | 2020-01-17 | 2020-01-17 | Temperature and pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111140664A true CN111140664A (en) | 2020-05-12 |
Family
ID=70525779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010053262.XA Pending CN111140664A (en) | 2020-01-17 | 2020-01-17 | Temperature and pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111140664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508595A (en) * | 2022-02-28 | 2022-05-17 | 武汉锅炉集团阀门有限责任公司 | Pressure-regulating and temperature-regulating steam valve |
-
2020
- 2020-01-17 CN CN202010053262.XA patent/CN111140664A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508595A (en) * | 2022-02-28 | 2022-05-17 | 武汉锅炉集团阀门有限责任公司 | Pressure-regulating and temperature-regulating steam valve |
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