CN117399190B - Rotary atomization temperature and pressure reducing valve - Google Patents
Rotary atomization temperature and pressure reducing valve Download PDFInfo
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- CN117399190B CN117399190B CN202311703969.0A CN202311703969A CN117399190B CN 117399190 B CN117399190 B CN 117399190B CN 202311703969 A CN202311703969 A CN 202311703969A CN 117399190 B CN117399190 B CN 117399190B
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- rotary atomizing
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- 238000000889 atomisation Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000007306 turnover Effects 0.000 claims abstract 2
- 238000012856 packing Methods 0.000 claims description 29
- 230000007704 transition Effects 0.000 claims description 10
- 239000003595 mist Substances 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000005267 amalgamation Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000498 cooling water Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
Abstract
The invention discloses a rotary atomization temperature and pressure reducing valve, belongs to the technical field of thermal power valves, and aims to solve the problem that temperature and pressure reducing water of the temperature and pressure reducing valve cannot be fully contacted and fused with primary steam. Including the valve body, the valve body is equipped with the cooling water entry, primary steam entry and the secondary steam export that meet the intercommunication, and the cooling tube inlays to be established the top of secondary steam export, telescopic periphery upper portion is connected with cooling water entry's inner periphery cooperation, and water conservancy diversion cover and telescopic lower extreme are the throat structure, and telescopic lower extreme extends to in the upper shed of cooling tube, forms annular runner clearance between sleeve and the cooling tube, and water conservancy diversion cover and sleeve cup joint outside in, and rotatory atomizing nozzle includes columniform nozzle main part, and processing has a plurality of sections to be semicircular first helicla flute and a plurality of second helicla flute on the outer peripheral face of nozzle main part, the periphery of nozzle main part and the interior turnover movable fit of water conservancy diversion cover. The rotary atomizing nozzle can enhance the atomizing effect, increase the contact area of the temperature reduction water and the medium, and realize rapid temperature reduction.
Description
Technical Field
The invention belongs to the technical field of thermal power valves, and particularly relates to a rotary atomization temperature and pressure reducing valve.
Background
The temperature and pressure reducing valve has the function of reducing the primary steam with relatively high pressure and temperature to the required low-temperature low-pressure secondary steam. The steam turbine is widely applied to enterprises such as thermoelectricity, petrifaction, light work, textile and the like, realizes the hierarchical utilization of steam, and is also widely applied to various systems of a steam turbine. In different systems of the steam turbine, the temperature and pressure reducing valve plays different roles, so that the steam demand of the steam turbine unit is met, the process demand of steam turbine exhaust is met, the problem of mismatching of steam turbine exhaust and load is solved, the steam turbine unit or the whole system is protected, the temperature and pressure reducing valve plays a vital role in the steam turbine system, but the arrangement of the temperature and pressure reducing valve meets rationality and necessity, and the safety and reliability of the unit are ensured while energy conservation and rationality are achieved.
The temperature-reducing and pressure-reducing valve reduces the temperature for the primary steam through the temperature-reducing water, whether the temperature-reducing water is in contact with the primary steam or not directly influences the temperature-reducing effect, the common temperature-reducing and pressure-reducing valve cannot be in full contact with and fused with the primary steam, and the temperature-reducing effect still needs to be improved.
Disclosure of Invention
The invention aims to provide a rotary atomization temperature and pressure reducing valve, which aims to solve the problem that the temperature and pressure reducing water of the temperature and pressure reducing valve cannot be fully contacted and fused with primary steam. The technical scheme adopted by the invention is as follows:
the rotary atomization temperature and pressure reducing valve comprises a valve body, wherein the valve body is formed by intersecting and communicating one ends of an upper pipe body, a lower pipe body, a left pipe body and a right pipe body, inner holes of the left pipe body and the right pipe body are primary steam inlets, inner holes of the lower pipe body are secondary steam outlets, a cooling pipe is embedded at the top end of each secondary steam outlet, a flow guide sleeve is sleeved with the inside and the outside of a sleeve, the upper part of the periphery of the sleeve is connected with the inner periphery of the upper pipe body in a matched manner, the lower ends of the flow guide sleeve and the sleeve are of a necking structure, the lower ends of the sleeve extend into an upper opening of a cooling pipe, and an annular flow channel gap is formed between the sleeve and the cooling pipe;
the rotary atomizing nozzle comprises a cylindrical nozzle main body, wherein a plurality of first spiral grooves and a plurality of second spiral grooves with semicircular sections are processed on the outer peripheral surface of the nozzle main body, the rotation directions of the first spiral grooves and the second spiral grooves are opposite, the outer periphery of the nozzle main body is in movable fit with the inner circumference of the flow guiding sleeve, the plurality of first spiral grooves and the plurality of second spiral grooves form a water reducing flow passage, and the ratio range of the total sectional area of the plurality of first spiral grooves to the total sectional area of the plurality of second spiral grooves is 3:1-5:1;
the packing chamber seat is cylindrical and is arranged in the upper pipe body, the packing chamber seat is propped against the sleeve up and down, and an inner hole of the packing chamber seat forms a temperature reduction water inlet;
the lower pipe body of the valve body is connected with a transition pipe, the transition pipe is in a flaring structure from top to bottom, a first throttling orifice plate and a second throttling orifice plate are arranged in the transition pipe from top to bottom, and a working gap is arranged between the first throttling orifice plate and the second throttling orifice plate;
primary steam respectively enters the valve body from two primary steam inlets, and the temperature reducing water passes through the temperature reducing waterThe warm water inlet enters the valve body, the desuperheating water flows through the desuperheating water channel in a spiral centrifugal movement mode, then is sprayed out from an outlet at the lower end of the guide sleeve, and forms low-temperature water mist, the low-temperature water mist and the primary steam are converged in the cooling pipe to form secondary steam, and finally the secondary steam flows out from the first throttling orifice plate and the second throttling orifice plate in sequence; the total flow area of the temperature reducing water flow channel is set as S, and the unit is mm 2 S is determined by:
；
wherein:
q is the flow of the desuperheating water, and the unit is t/h;
k 1 is a margin coefficient;
a is a balance coefficient;
ΔP is the pressure difference of the reduced temperature water before and after flowing through the rotary atomizing nozzle, and the unit is kg/cm 2 ；
v is specific volume of the dehydrated water before flowing through the rotary atomizing nozzle, and the unit is m 3 /kg。
Further, the number n of first helical grooves is determined by:
；
wherein: d is the cross-sectional diameter of the first spiral groove, and the unit is mm;
k 2 is the ratio of the cross-sectional areas of the second spiral grooves to the cross-sectional areas of the first spiral grooves.
Further, the water conservancy diversion cover comprises upper portion cover, middle part cover and lower part cover from top to bottom coaxial amalgamation in proper order, and the hole of upper portion cover and the hole of middle part cover all are equipped with spacing binding off conical surface structure, and the periphery of nozzle main part cooperatees with the inner periphery of middle part cover, and the nozzle main part is in between the spacing binding off conical surface structure of upper portion cover and middle part cover.
Further, the periphery of upper portion cover links to each other through threaded structure with telescopic inner periphery, and lower part cover links to each other with the sleeve welding, has seted up a plurality of slots on the up end of lower part cover, is equipped with a plurality of inserts on the lower terminal surface of middle part cover, a plurality of the slot with a plurality of the corresponding grafting cooperation of inserts.
Further, a plurality of throttle holes are processed on the first throttle hole plate and the second throttle hole plate, and the total area of the throttle holes of the first throttle hole plate and the second throttle hole plate is set as S 1 In mm 2 S is then 1 Determined by the following formula:
；
wherein:
c is an experience coefficient;
Q s the unit is t/h for primary steam flow;
b is an experience coefficient;
mu is the flow coefficient of the orifice plate;
phi is the expansion coefficient of the orifice plate;
P 1 the primary steam pressure is expressed in MPa;
V 1 is the specific volume of primary steam, and has the unit of m 3 /kg。
Further, the spiral angle of the first spiral groove is 10-80 degrees.
Further, the sleeve is in threaded fit with the valve body, and the guide sleeve is in threaded fit with the sleeve.
Further, bosses are arranged on the upper end face and the lower end face of the nozzle main body.
Further, the lower extreme of packing room seat is equipped with flange structure, flange structure's lower terminal surface and telescopic up end are supported and are leaned on, flange structure's periphery and the inner periphery of last body cooperate, are equipped with the packing seal between packing room seat and the last body, and the packing gland is in the packing seal is in flange structure.
Compared with the prior art, the invention has the beneficial effects that:
1. when the heat-reducing water flows through the first spiral grooves, the impact force generated by the first spiral grooves has horizontal first component force, and because the first spiral grooves are formed in the outer peripheral surface of the rotary atomizing nozzle, the horizontal first component force can drive the rotary atomizing nozzle to rotate, so that the atomizing effect can be enhanced, the contact area of the heat-reducing water and a primary steam medium is increased, and the rapid heat reduction is realized. The rotating speed of the rotary atomizing nozzle is not too high, sprayed water is converged to form a water column if the rotating speed is too high, so that the total flow area of a plurality of first spiral grooves cannot be increased, the first spiral groove flow sectional area is properly set, a plurality of second spiral grooves which are opposite to the first spiral grooves in rotation direction are formed on the peripheral surface of the rotary atomizing nozzle at the same time, the impact force of the water for reducing the temperature on the plurality of second spiral grooves has horizontal second component force, and the ratio of the total sectional area of the plurality of first spiral grooves to the total sectional area of the plurality of second spiral grooves is 3:1-5:1, so that the horizontal second component force is different from the horizontal first component force in magnitude and opposite in direction, and the horizontal resultant force generated by the water for reducing the temperature is smaller than the first horizontal component force, so that the rotary atomizing nozzle can be driven to rotate at a proper speed, and the effects of reducing the rotating speed and stabilizing the flow can be achieved.
2. The medium after the temperature reduction is secondary steam, and the secondary steam is subjected to layered pressure reduction through the first throttling orifice plate and the second throttling orifice plate, so that valve vibration caused by overlarge pressure difference is reduced, and the accurate and stable pressure reduction function is realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a flow sleeve;
FIG. 3 is a schematic view of a structure of a rotary atomizing nozzle;
FIG. 4 is a schematic structural view of a sleeve;
fig. 5 is a schematic structural view of the first orifice plate.
In the drawings, 1, valve body, 11, lower tube, 12, right tube, 13, left tube, 14, upper tube, 15, cooling tube, 2, flow sleeve, 21, upper sleeve, 22, middle sleeve, 23, lower sleeve, 3, rotary atomizing nozzle, 31, nozzle body, 32, boss, 33, first spiral groove, 34, second spiral groove, 4, sleeve, 5, packing chamber seat, 6, packing seal, 7, packing gland, 8, transition tube, 81, first orifice plate, 82, second orifice plate.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, wherein the fixed connection is a conventional fixed connection mode such as folding connection, rivet connection, bonding connection, welding connection and the like, the detachable connection comprises a conventional detachable mode such as bolt connection, buckle connection, pin connection, hinge connection and the like, and when a specific connection mode is not limited, at least one connection mode can be found in the conventional connection mode by default to realize the function, and the person skilled in the art can select the function according to the needs. For example: the fixed connection is welded connection, and the detachable connection is bolted connection.
The present invention will be described in further detail below with reference to the accompanying drawings, the following examples being illustrative of the present invention and the present invention is not limited to the following examples.
Examples: as shown in fig. 1-5, the rotary atomization temperature and pressure reducing valve comprises a valve body 1, wherein the valve body 1 is formed by connecting one ends of an upper pipe body 14, a lower pipe body 11, a left pipe body 13 and a right pipe body 12, the inner holes of the left pipe body 13 and the right pipe body 12 are primary steam inlets, the inner hole of the lower pipe body 11 is a secondary steam outlet, a cooling pipe 15 is embedded at the top end of the secondary steam outlet, a guide sleeve 2 is sleeved with a sleeve 4 in an inner and outer manner, the upper part of the periphery of the sleeve 4 is connected with the inner periphery of the upper pipe body 14 in a matched manner, the lower ends of the guide sleeve 2 and the sleeve 4 are of a shrinkage structure, the lower end of the sleeve 4 extends into an upper opening of the cooling pipe 15, and an annular flow passage gap is formed between the sleeve 4 and the cooling pipe 15;
the rotary atomizing nozzle 3 comprises a cylindrical nozzle main body 31, a plurality of first spiral grooves 33 and a plurality of second spiral grooves 34 with semicircular sections are processed on the outer peripheral surface of the nozzle main body 31, the rotation directions of the first spiral grooves 33 and the second spiral grooves 34 are opposite, the outer periphery of the nozzle main body 31 is in movable fit with the inner periphery of the guide sleeve 2, the plurality of first spiral grooves 33 and the plurality of second spiral grooves 34 form a water reducing flow passage, and the ratio range of the total sectional area of the plurality of first spiral grooves 33 to the total sectional area of the plurality of second spiral grooves 34 is 3:1-5:1;
the packing chamber seat 5 is cylindrical, the packing chamber seat 5 is arranged in the upper pipe body 14, the packing chamber seat 5 is propped against the sleeve 4 up and down, and an inner hole of the packing chamber seat 5 forms a temperature reduction water inlet;
the lower pipe body 11 of the valve body 1 is connected with the transition pipe 8, the transition pipe 8 is in a flaring structure from top to bottom, a first orifice plate 81 and a second orifice plate 82 are arranged in the transition pipe 8 from top to bottom, and a working gap is arranged between the first orifice plate 81 and the second orifice plate 82;
the primary steam respectively enters the valve body 1 from two primary steam inlets, the desuperheating water enters the valve body 1 through the desuperheating water inlets, the desuperheating water firstly flows through the desuperheating water flow channel in a spiral centrifugal motion mode, then is sprayed out from an outlet at the lower end of the guide sleeve 2, and forms low-temperature water mist, the low-temperature water mist and the primary steam are intersected in the cooling pipe 15 to form secondary steam, and finally the secondary steam flows out from the first throttling orifice 81 and the second throttling orifice 82 in sequence;
the total flow area of the temperature reducing water flow channel is set as S, and the unit is mm 2 S is determined by:
；
wherein:
q is the flow of the desuperheating water, and the unit is t/h;
k 1 taking the margin coefficient as 5.04;
a is a balance coefficient;
ΔP is the pressure difference of the reduced temperature water before and after flowing through the rotary atomizing nozzle 3, and has the unit ofkg/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The front end pressure of the rotary atomizing nozzle 3 is given by a user, and the rear end pressure of the rotary atomizing nozzle 3 is primary steam initial pressure which is a design initial setting parameter;
v is specific volume of the reduced-temperature water before flowing through the rotary atomizing nozzle 3, and the unit is m 3 /kg。
When the heat-reducing water flows through the first spiral grooves 33, the impact force generated by the first spiral grooves 33 has a horizontal first component force, and because the first spiral grooves 33 are formed on the outer circumferential surface of the rotary atomizing nozzle 3, the horizontal first component force can drive the rotary atomizing nozzle 3 to rotate, so that the atomizing effect can be enhanced, the contact area of the heat-reducing water and a primary steam medium can be increased, and the rapid heat reduction can be realized. The rotating speed of the rotary atomizing nozzle 3 is not too high, if the rotating speed is too high, sprayed water is collected to form a water column, so that the total flow area of the plurality of first spiral grooves 33 cannot be increased, the flow cross section of the first spiral grooves 33 is properly set, a plurality of second spiral grooves 34 which are opposite to the rotation direction of the first spiral grooves 33 are formed on the outer peripheral surface of the rotary atomizing nozzle 3 at the same time when the flow cross section of the first spiral grooves 33 is properly set, the impact force of the water for reducing the temperature on the plurality of second spiral grooves 34 has a horizontal second component, and the ratio of the total cross section of the plurality of first spiral grooves 33 to the total cross section of the plurality of second spiral grooves 34 is in the range of 3:1-5:1, so that the horizontal second component is different from the horizontal first component in size and opposite in direction, and the horizontal resultant force generated by the water for reducing the temperature is smaller than the first horizontal component, so that the rotary atomizing nozzle 3 can be driven to rotate at a proper speed, and the rotating speed and steady flow can be achieved.
The number n of first helical grooves 33 is determined by:
；
wherein: d is the cross-sectional diameter of the first helical groove 33 in mm;
k 2 is the ratio of the cross-sectional area of the second plurality of helical grooves 34 to the cross-sectional area of the first plurality of helical grooves 33.
The flow guiding sleeve 2 is formed by coaxially splicing an upper sleeve 21, a middle sleeve 22 and a lower sleeve 23 from top to bottom in sequence, wherein the inner holes of the upper sleeve 21 and the middle sleeve 22 are respectively provided with a limiting closing-in conical surface structure, the periphery of the nozzle main body 31 is matched with the inner periphery of the middle sleeve 22, and the nozzle main body 31 is positioned between the limiting closing-in conical surface structures of the upper sleeve 21 and the middle sleeve 22. The convergent cone wall structures of the nozzle body 31 in the upper and middle jackets 21, 22 serve to axially limit the rotary atomizing nozzle 3, allowing for slight axial movement of the rotary atomizing nozzle 3 between the convergent cone wall structures of the upper and middle jackets 21, 22.
The periphery of upper portion cover 21 links to each other through the helicitic texture with the inner periphery of sleeve 4, and lower part cover 23 links to each other with sleeve 4 welding, has offered a plurality of slots on the up end of lower part cover 23, is equipped with a plurality of inserts on the lower terminal surface of middle part cover 22, a plurality of the slot with a plurality of the corresponding grafting cooperation of inserts. The lower sleeve 23 is fixedly connected with the sleeve 4, the upper sleeve 21 is movably connected with the sleeve 4, and the middle sleeve 22 is matched with the lower sleeve 23 to prevent rotation and avoid influencing the rotary atomizing nozzle 3.
The first orifice plate 81 and the second orifice plate 82 are provided with a plurality of orifices, and the total area of the plurality of orifices of the first orifice plate 81 and the second orifice plate 82 is set as S 1 In mm 2 S is then 1 Determined by the following formula:
；
wherein:
c is an experience coefficient;
Q s the unit is t/h for primary steam flow;
b is an experience coefficient;
mu is the flow coefficient of the orifice plate;
phi is the expansion coefficient of the orifice plate;
P 1 the primary steam pressure is expressed in MPa;
V 1 is the specific volume of primary steam, and has the unit of m 3 /kg。
The first spiral groove 33 has a spiral angle of 10 ° to 80 °.
The medium after the temperature reduction is secondary steam, and the secondary steam is subjected to layered pressure reduction through the first orifice plate 81 and the second orifice plate 82, so that valve vibration caused by overlarge pressure difference is reduced, and the accurate and stable pressure reduction function is realized.
The sleeve 4 is in threaded fit with the valve body 1, and the guide sleeve 2 is in threaded fit with the sleeve 4.
Bosses 32 are provided on the upper and lower end surfaces of the nozzle body 31. For upward pressing or lifting when the rotary atomizing nozzle 3 is taken out.
The lower extreme of packing room seat 5 is equipped with flange structure, flange structure's lower terminal surface and sleeve 4's up end are supported and are leaned on, and flange structure's periphery and the inner periphery of last body 14 cooperate, are equipped with packing seal 6 between packing room seat 5 and the last body 14, and packing gland 7 presses packing seal 6 on the flange structure.
The above embodiments are only illustrative of the present invention and do not limit the scope thereof, and those skilled in the art may also make modifications to parts thereof without departing from the spirit of the invention.
Claims (9)
1. The utility model provides a rotatory atomizing temperature-reducing and pressure-reducing valve which characterized in that: the novel cooling device comprises a valve body (1), wherein the valve body (1) is formed by connecting one ends of an upper pipe body (14), a lower pipe body (11), a left pipe body (13) and a right pipe body (12), the inner holes of the left pipe body (13) and the right pipe body (12) are primary steam inlets, the inner hole of the lower pipe body (11) is a secondary steam outlet, a cooling pipe (15) is embedded at the top end of the secondary steam outlet, a guide sleeve (2) is sleeved with a sleeve (4) in an inner and outer manner, the upper part of the periphery of the sleeve (4) is connected with the inner periphery of the upper pipe body (14) in a matched manner, the lower ends of the guide sleeve (2) and the sleeve (4) are of a necking structure, the lower end of the sleeve (4) extends into an upper opening of the cooling pipe (15), and an annular flow passage gap is formed between the sleeve (4) and the cooling pipe (15);
the rotary atomizing nozzle (3) comprises a cylindrical nozzle main body (31), a plurality of first spiral grooves (33) and a plurality of second spiral grooves (34) with semicircular sections are formed in the peripheral surface of the nozzle main body (31), the rotation directions of the first spiral grooves (33) and the second spiral grooves (34) are opposite, the periphery of the nozzle main body (31) is in inner turnover fit with the flow guiding sleeve (2), the plurality of first spiral grooves (33) and the plurality of second spiral grooves (34) form a water cooling flow passage, and the ratio range of the total cross section area of the plurality of first spiral grooves (33) to the total cross section area of the plurality of second spiral grooves (34) is 3:1-5:1;
the packing chamber seat (5) is cylindrical, the packing chamber seat (5) is arranged in the upper pipe body (14), the packing chamber seat (5) is propped against the sleeve (4) up and down, and an inner hole of the packing chamber seat (5) forms a water cooling inlet;
the lower pipe body (11) of the valve body (1) is connected with the transition pipe (8), the transition pipe (8) is in a flaring structure from top to bottom, a first orifice plate (81) and a second orifice plate (82) are arranged in the transition pipe (8) up and down, and a working gap is arranged between the first orifice plate (81) and the second orifice plate (82);
the primary steam respectively enters the valve body (1) through two primary steam inlets, the desuperheating water enters the valve body (1) through the desuperheating water inlets, the desuperheating water firstly flows through the desuperheating water flow channel in a spiral centrifugal motion mode, then is sprayed out through an outlet at the lower end of the guide sleeve (2) and forms low-temperature water mist, the low-temperature water mist and the primary steam are converged in the cooling pipe (15) to form secondary steam, and finally the secondary steam flows out from the first throttling orifice plate (81) and the second throttling orifice plate (82) in sequence;
the total flow area of the temperature reducing water flow channel is set as S, and the unit is mm 2 S is determined by:；
wherein:
q is the flow of the desuperheating water, and the unit is t/h;
k 1 is a margin coefficient;
a is a balance coefficient;
ΔP is the temperature-reduced water flowing through the rotary atomizing nozzle(3) The pressure difference between the front and the rear is kg/cm 2 ；
v is specific volume of the reduced-temperature water before flowing through the rotary atomizing nozzle (3), and the unit is m 3 /kg。
2. A rotary atomizing temperature and pressure reducing valve as set forth in claim 1, wherein: the number n of first helical grooves (33) is determined by:；
wherein: d is the cross-sectional diameter of the first spiral groove (33) in mm;
k 2 is the ratio of the cross-sectional area of the second spiral grooves (34) to the cross-sectional area of the first spiral grooves (33).
3. A rotary atomizing temperature and pressure reducing valve as set forth in claim 1, wherein: the water conservancy diversion cover (2) comprises upper portion cover (21), middle part cover (22) and lower part cover (23) from top to bottom coaxial amalgamation in proper order, and the hole of upper portion cover (21) and the hole of middle part cover (22) all are equipped with spacing binding off conical surface structure, and the periphery of nozzle main part (31) cooperatees with the inner periphery of middle part cover (22), and nozzle main part (31) are in between the spacing binding off conical surface structure of upper portion cover (21) and middle part cover (22).
4. A rotary atomizing temperature and pressure reducing valve as set forth in claim 3, wherein: the periphery of upper portion cover (21) links to each other through the helicitic texture with the inner periphery of sleeve (4), and lower part cover (23) links to each other with sleeve (4) welding, has seted up a plurality of slots on the up end of lower part cover (23), is equipped with a plurality of inserts on the lower terminal surface of middle part cover (22), a plurality of the slot with a plurality of the corresponding grafting cooperation of inserts.
5. A rotary atomizing temperature and pressure reducing valve as set forth in claim 1, wherein: a plurality of orifices are processed on the first orifice plate (81) and the second orifice plate (82), and are provided withThe total area of a plurality of orifices of the first orifice plate (81) and the second orifice plate (82) is S 1 In mm 2 S is then 1 Determined by the following formula:
；
wherein:
c is an experience coefficient;
Q s the unit is t/h for primary steam flow;
b is an experience coefficient;
mu is the flow coefficient of the orifice plate;
phi is the expansion coefficient of the orifice plate;
P 1 the primary steam pressure is expressed in MPa;
V 1 is the specific volume of primary steam, and has the unit of m 3 /kg。
6. A rotary atomizing temperature and pressure reducing valve as set forth in claim 1, wherein: the first spiral groove (33) has a spiral angle of 10 DEG to 80 deg.
7. A rotary atomizing temperature and pressure reducing valve as set forth in claim 1, wherein: the sleeve (4) is in threaded fit with the valve body (1), and the guide sleeve (2) is in threaded fit with the sleeve (4).
8. A rotary atomizing temperature and pressure reducing valve as set forth in claim 1, wherein: bosses (32) are arranged on the upper end face and the lower end face of the nozzle main body (31).
9. A rotary atomizing temperature and pressure reducing valve as set forth in any one of claims 1-8, wherein: the lower extreme of packing room seat (5) is equipped with flange structure, the lower terminal surface of flange structure offsets with the up end of sleeve (4) and leans on, the periphery of flange structure cooperatees with the inner periphery of last body (14), is equipped with packing seal (6) between packing room seat (5) and the last body (14), and packing gland (7) are in packing seal (6) are pressed on the flange structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311703969.0A CN117399190B (en) | 2023-12-13 | 2023-12-13 | Rotary atomization temperature and pressure reducing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311703969.0A CN117399190B (en) | 2023-12-13 | 2023-12-13 | Rotary atomization temperature and pressure reducing valve |
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| Publication Number | Publication Date |
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| CN117399190A CN117399190A (en) | 2024-01-16 |
| CN117399190B true CN117399190B (en) | 2024-02-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0498306A (en) * | 1990-08-09 | 1992-03-31 | Tlv Co Ltd | Pressure reducer and attemperator valve |
| US6276823B1 (en) * | 1995-11-30 | 2001-08-21 | Komax Systems, Inc. | Method for desuperheating steam |
| JP2005066543A (en) * | 2003-08-27 | 2005-03-17 | Abb Kk | Spray nozzle for steam attemperation |
| CN107255181A (en) * | 2017-06-28 | 2017-10-17 | 哈电集团哈尔滨电站阀门有限公司 | Steam support type steam converter valve |
| CN207430553U (en) * | 2017-11-14 | 2018-06-01 | 哈尔滨滨大阀门制造有限公司 | Steam aids in desuperheat water atomizing nozzle |
| CN210979803U (en) * | 2019-09-28 | 2020-07-10 | 山东科技大学 | Novel superheated steam desuperheater |
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2023
- 2023-12-13 CN CN202311703969.0A patent/CN117399190B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0498306A (en) * | 1990-08-09 | 1992-03-31 | Tlv Co Ltd | Pressure reducer and attemperator valve |
| US6276823B1 (en) * | 1995-11-30 | 2001-08-21 | Komax Systems, Inc. | Method for desuperheating steam |
| JP2005066543A (en) * | 2003-08-27 | 2005-03-17 | Abb Kk | Spray nozzle for steam attemperation |
| CN107255181A (en) * | 2017-06-28 | 2017-10-17 | 哈电集团哈尔滨电站阀门有限公司 | Steam support type steam converter valve |
| CN207430553U (en) * | 2017-11-14 | 2018-06-01 | 哈尔滨滨大阀门制造有限公司 | Steam aids in desuperheat water atomizing nozzle |
| CN210979803U (en) * | 2019-09-28 | 2020-07-10 | 山东科技大学 | Novel superheated steam desuperheater |
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| CN117399190A (en) | 2024-01-16 |
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