CN213145538U - Temperature-reducing water regulating valve - Google Patents
Temperature-reducing water regulating valve Download PDFInfo
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- CN213145538U CN213145538U CN202021721895.5U CN202021721895U CN213145538U CN 213145538 U CN213145538 U CN 213145538U CN 202021721895 U CN202021721895 U CN 202021721895U CN 213145538 U CN213145538 U CN 213145538U
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Abstract
The utility model belongs to the technical field of adjusting device, specifically provide a temperature-reducing water regulating valve, including valve body, valve gap and disk seat, inlet channel and outlet channel have been seted up on the valve body, install the main valve core in the disk seat, the valve cover is connected to the top of disk seat, set up first through-flow hole on the main valve core, install the leading valve core in the first through-flow hole, connect the valve rod on the leading valve core, the upper portion of first through-flow hole pore wall sets up the gland, set up the second through-flow hole on the valve cover, set up the third through-flow hole on the main valve core, the third through-flow hole all communicates with the first through-flow hole through the connecting hole, set up the pressure release case in the third through-flow hole, set up the first water conservancy diversion hole on the valve seat, set up the second; the temperature-reducing water regulating valve can automatically regulate the pressure above the main valve core and in the inner cavity of the main valve core, thereby reducing vibration and squeal, preventing cavitation through throttling, greatly reducing noise and prolonging service life.
Description
Technical Field
The utility model belongs to the technical field of adjusting device, concretely relates to temperature-reducing water regulating valve.
Background
The boiler desuperheating water regulating valve is a boiler water spraying desuperheating automatic regulating equipment of a thermal power plant, is arranged on a water spraying pipeline of a boiler superheater, a reheater and a steam bypass system, and controls the opening of the valve by signals of steam temperature, pressure and the like in the boiler superheater, the reheater and the bypass pipeline, thereby regulating the water inflow of the water spraying pipe, so that the temperature change of required steam is kept in an allowable range. When the valve operates at a small opening, the flow rate of a valve port is too high, so that the static pressure head of a medium is reduced and may be lower than the saturation pressure, and the flash evaporation phenomenon is caused. Severe cavitation is generated at the sealing surface of the valve; after long-term operation, serious internal leakage, small-opening vibration and squeal occur, and accurate adjustment is difficult to realize.
How to develop a desuperheating water regulating valve that can automatically adjust the pressure of case epicoele and case cavity of resorption to reduce vibration and squeal, sealed effectual, can realize accurate regulation, and life extension is the technical problem that relevant field technical staff had a urgent need to solve.
SUMMERY OF THE UTILITY MODEL
The utility model provides a desuperheating water regulating valve aims at overcoming the problem that in the prior art, the desuperheating water regulating valve can generate cavitation, scouring and other damages to valve internals under the high pressure difference working condition, so that the sealing surface loses the closing capability, the leakage flow is too large, the steam temperature is difficult to control, and the valve port flow velocity is too high when the valve is operated at a small opening degree, the medium static pressure head is reduced and is lower than the saturation pressure, the flash evaporation phenomenon is caused, and the serious cavitation is generated at the sealing surface of the valve; the purpose is to overcome the problems that after the temperature-reducing water regulating valve in the prior art is operated for a long time, serious internal leakage, small-opening vibration and squeal occur, and accurate regulation is difficult to realize.
Therefore, the utility model provides a temperature-reducing water regulating valve, which comprises a valve body, a valve cover, a valve rod, a valve sleeve, a pilot valve core, a main valve core, a throttling sleeve and a valve seat, wherein the valve cover is connected on the valve body, a water inlet channel is arranged on the left part of the valve body from left to right, a cavity and a water outlet channel are arranged on the middle part of the valve body from top to bottom in sequence, the valve cover and the valve seat are connected in sequence from top to bottom inside the cavity, the bottom of the valve seat is connected with the water outlet channel through the throttling sleeve, the main valve core is connected inside the valve seat, a first through-flow hole is arranged on the upper part of the main valve core from top to bottom, an inner cavity of the main valve core is arranged on the lower part of the main valve core from top to bottom, the pilot valve core is connected in the first through-flow hole, the valve rod passes through the valve cover from, the third water conservancy diversion hole has been seted up on the throttle sleeve, and second discharge orifice, first discharge orifice and third discharge orifice all communicate with inhalant canal, third discharge orifice and third discharge orifice are seted up from the top down on the upper portion of main valve core and are communicated with inhalant canal through first discharge orifice, set up second discharge orifice and be located the below of second discharge orifice on the main valve core.
Furthermore, the valve further comprises a guide sleeve, an inner hole is formed in the inner side of the lower portion of the valve cover, the guide sleeve is connected in the inner hole, and the valve rod penetrates through the guide sleeve and is connected with the pilot valve core.
Furthermore, the lower part of the pilot valve core is provided with a lifting part, and the lifting part is a circle of bulges.
Further, still include the gland, the gland cup joints on the guide valve core on promoting the portion.
Furthermore, the upper part of the first through flow hole is provided with threads, and the gland is connected with the main valve core through the threads.
Furthermore, the pressure relief valve also comprises a pressure relief valve core, and the pressure relief valve core is connected inside the third through hole.
Furthermore, the number of the second through holes and the number of the third through holes are both multiple, and the multiple third through holes are distributed at equal intervals along the circumferential direction of the first through holes.
Further, the first diversion hole and the second diversion hole are both throttling holes.
Furthermore, main valve core has seted up connecting hole and pressure release hole, and pressure release hole one end intercommunication second through-flow hole, the first through-flow hole of pressure release hole other end intercommunication, third through-flow hole pass through connecting hole and first through-flow hole intercommunication.
The utility model has the advantages that:
1. the utility model adopts the pilot mode, when the valve needs to be opened emergently, the actuating mechanism drives the valve rod to open the pilot valve core, when the valve is closed, the actuating mechanism medium pushes the pilot valve core downwards, the pilot valve core goes down, the opening speed is high, and the shutoff is tight;
2. the valve rod of the utility model adopts a thin valve rod, which reduces the friction force and has stable adjustment;
3. the utility model adopts three-level sleeve of valve sleeve, main valve core, valve seat and pilot valve core to improve the throttling grade;
4. the pressure relief valve core automatically adjusts the pressure above the main valve core and in the inner cavity of the main valve core to form a balance valve structure, so that the vibration of the pilot valve core and the main valve core is avoided when large pressure drop occurs between the upper part of the main valve core and the inner cavity of the main valve core, and the noise is avoided;
5. the utility model has the advantages that the second through-flow hole, the second flow guide hole and the first flow guide hole which are throttling holes enable the pressure to be in the pressure before the valve in the process of just opening the valve, the valve has high adjusting characteristic and the energy is gradually consumed in the throttling process, thereby preventing the occurrence of cavitation, greatly reducing the noise and prolonging the service life;
6. the utility model has the advantages of simple structure, the realization is with low costs, excellent in use effect, convenient to popularize and use.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of a desuperheating water regulating valve;
FIG. 2 is a schematic view of a partial configuration of a main spool;
fig. 3 is a schematic view of a connection structure of the pilot valve spool and the valve stem.
Description of reference numerals: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. a guide sleeve; 5. a valve housing; 6. a second vent hole; 7. a pilot valve spool; 8. a main valve element; 9. a first through-flow aperture; 10. A throttling sleeve; 11. a water outlet channel; 12. a third flow guide hole; 13. a first flow guide hole; 14. a second flow guide hole; 15. a water inlet channel; 16. a valve seat; 17. a third flowthrough hole; 18. a gland; 19. A plug; 20. connecting holes; 21. a pressure relief vent; 8-1, main valve core inner cavity; 2-1, inner hole; 7-1, a lifting part; 22. a cavity.
Detailed Description
Example 1:
as shown in fig. 1-2, a temperature-reducing water regulating valve comprises a valve body 1, a valve cover 2, a valve rod 3, a valve sleeve 5, a pilot valve core 7, a main valve core 8, a throttling sleeve 10 and a valve seat 16, wherein the valve cover 2 is connected to the upper surface of the valve body 1, a water inlet passage 15 is arranged from left to right on the left portion of the valve body 1, a cavity 22 and a water outlet passage 11 are sequentially arranged from top to bottom in the middle of the valve body 1, the valve sleeve 5 and the valve seat 16 are sequentially connected from top to bottom in the cavity 22, the bottom of the valve seat 16 is connected to the water outlet passage 11 through the throttling sleeve 10, the main valve core 8 is connected to the valve seat 16, a first through hole 9 is arranged in the upper portion of the main valve core 8 from top to bottom, a main valve core cavity 8-1 is arranged in the lower portion of the main valve core 8 from top to bottom, the first through valve core 7 is connected to the first through hole 9, the valve rod, the valve housing 5 has been seted up second through-flow hole 6, has seted up first water conservancy diversion hole 13 on the disk seat 16, has seted up third water conservancy diversion hole 12 on the throttle cover 10, and second through-flow hole 6, first water conservancy diversion hole 13 and third water conservancy diversion hole 12 all communicate with inhalant canal 15, third through-flow hole 17 and third through-flow hole 17 have been seted up downwards from the top to the upper portion of main valve core 8 and have been communicated with inhalant canal 15 through first through-flow hole 9, main valve core 8 has been seted up second water conservancy diversion hole 14 and is located the below of second through-flow hole 6.
When in use, the pressure before the valve and the pressure after the valve are respectively P1、P2(ii) a The pressure above the main valve core 8 and the pressure in the inner cavity 8-1 of the main valve core are sequentially P0、P01，P0Is approximately P1,P2Less than P01，P01Is approximately P0. When the valve needs emergencyWhen the valve is opened, the actuator drives the valve rod 3 to open the pilot valve core 7 firstly, a medium enters the second through-flow hole 6 through the water inlet channel 15 and enters the upper part of the main valve core 8 from a gap between the valve sleeve 5 and the main valve core 8, the medium above the main valve core 8 is balanced with the pressure above the main valve core 8 through the pressure relief hole 21 due to the pressure difference between the upper part and the lower part of the pressure relief valve core in the third through-flow hole 17, the medium further enters the cavity 8-1 of the main valve core and the cavity of the valve seat 16 through the third through-flow hole 17, the connecting hole 15 and the first through-flow hole 9 from the upper part of the main valve core 8, the pressure above the main valve core 8 and the cavity 8-1 of the main valve core are automatically regulated through the pressure relief valve core to form a balance valve structure, and the pressure above the main valve core01. Thereafter, the pilot valve core 7 continues to move upwards and drives the gland 18 to drive the main valve core 8 to move upwards through the lifting part 7-1, and at the moment, P is2And P0Is approximately P1And the valve is fully opened, at the moment, the second through-flow hole 6 corresponds to the second flow guide hole 14, and the medium in the water inlet channel 15 directly enters the cavity of the valve seat 16 through the second through-flow hole 6 and the second flow guide hole 14, enters the third flow guide hole 12 through the first flow guide hole 13, and enters the water outlet channel 11 through the third flow guide hole 12. When the valve is closed, the medium of the actuating mechanism pushes the pilot valve core 7 downwards, the pilot valve core 7 descends, and at the moment, a downward force P is also applied to the main valve core 8 above the main valve core 80Effectively reducing the actuating force of the actuator, P at the beginning of closing0Is approximately P1After the valve is completely closed, P0Is approximately P1，P2Less than P0(ii) a And realizing accurate adjustment.
The utility model adopts the pilot mode, when the valve needs to be opened emergently, the actuating mechanism drives the valve rod 3 to open the pilot valve core 7, when the valve is closed, the actuating mechanism medium pushes the pilot valve core 7 downwards, the pilot valve core 7 descends, the opening speed is high, and the shutoff is tight; the valve rod is a thin valve rod, so that the friction force is reduced, and the adjustment is stable; the valve sleeve, the main valve core, the valve seat and the pilot valve core are adopted to form a three-level sleeve, so that the throttling grade is improved; simple structure, low implementation cost, good use effect and convenient popularization and use.
Example 2:
on the basis of the embodiment 1, the valve further comprises a guide sleeve 4, an inner hole 2-1 is formed in the inner side of the lower portion of the valve cover 2, the guide sleeve 4 is connected in the inner hole 2-1, and the valve rod 3 penetrates through the guide sleeve 4 and is connected with the pilot valve core 7. The valve rod 3 is in sliding fit with the hole wall of the guide sleeve 4; the guide sleeve 4 plays a role in supporting the valve rod 3, and simultaneously ensures that the valve rod 3 is coaxial with the pilot valve core 7, and ensures that the pilot valve core 7 is high in opening speed and tight in turn-off.
As shown in fig. 3, a lifting portion 7-1 is further formed at the lower portion of the pilot valve core 7, and the lifting portion 7-1 is a circle of protrusion. The raised lifting part 7-1 is convenient for the pilot valve element 7 to move upwards to drive the gland 18 and further drive the main valve element 8 to move upwards for opening, and has simple structure and exquisite and reasonable design.
Furthermore, the device also comprises a gland 18, and the gland 18 is sleeved on the pilot valve core 7 on the lifting part 7-1. Further, the upper portion of the first through-flow hole 9 is threaded, and the gland 18 is connected with the main valve element 8 through threads. The gland 18 is arranged on the lifting part 7-1, and the assembly is considered mainly, the gland 18 is firstly arranged on the thread on the upper part of the main valve core 8, so that the assembly is convenient, and the sliding fit of the pilot valve core 7 and the hole wall of the third through hole 17 is also ensured.
Further, the valve further includes a pressure relief valve core, and the pressure relief valve core is connected to the inside of the third through-flow hole 17. The pressure above the main valve element 8 and the pressure in the inner cavity 8-1 of the main valve element are automatically adjusted through the pressure relief valve element to form a balance valve structure, so that the pilot valve element 7 and the main valve element 8 are prevented from vibrating when large pressure drop occurs between the upper part of the main valve element 8 and the inner cavity 8-1 of the main valve element, and noise is avoided.
Furthermore, the number of the second through holes 6 and the number of the third through holes 17 are both multiple, and the multiple third through holes 17 are distributed at equal intervals along the circumference of the first through hole 9. Can set up according to actual conditions to adjust flow and pressure, strong adaptability.
Further, the first guide hole 13 and the second guide hole 14 are both throttle holes. The throttling hole enables the pressure of the valve to be in front of the valve in the process of opening the valve, the valve has high adjusting characteristic and energy is gradually consumed in the throttling process, cavitation is prevented, noise is greatly reduced, and the service life is prolonged.
Furthermore, main valve element 8 has seted up connecting hole 20 and pressure release hole 21, and pressure release hole 21 one end intercommunication second through-flow hole 6, and the first through-flow hole 9 of pressure release hole 21 other end intercommunication, third through-flow hole 17 is through connecting hole 20 and first through-flow hole 9 intercommunication. The pressure relief hole 21 is used for adjusting the balance of the upper pressure and the lower pressure of the pilot valve core 7, and has a simple structure and a novel and reasonable design;
furthermore, the valve further comprises a plug 19, the connecting hole 20 is a through hole, and a part, close to the second through-flow hole 6, in the connecting hole 20 is connected with the plug 19, which mainly takes machining into consideration, and in the ideal case, the connecting hole 20 in the form of a blind hole is formed in the hole wall of the first through-flow hole 9, but the machining of the connecting hole 20 is inconvenient, so that the connecting hole 20 in the form of a through hole is formed in the outer wall of the main valve element 8, and then the plug 19 is plugged in the part, close to the second through-flow hole 6, in the connecting hole 20, so that a medium flowing from the third through-flow hole 17 from top to bottom is prevented.
In the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "right", etc., it is based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present invention.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent structure transform that the above embodiment was done the utility model discloses technical scheme's within the scope of protection.
Claims (9)
1. A temperature-reducing water regulating valve is characterized in that: comprises a valve body (1), a valve cover (2), a valve rod (3), a valve sleeve (5), a pilot valve core (7), a main valve core (8), a throttling sleeve (10) and a valve seat (16), wherein the valve cover (2) is connected to the upper surface of the valve body (1), a water inlet channel (15) is formed in the left part of the valve body (1) from left to right, a cavity (22) and a water outlet channel (11) are sequentially formed in the middle of the valve body (1) from top to bottom, the valve sleeve (5) and the valve seat (16) are sequentially connected to the inside of the cavity (22) from top to bottom, the bottom of the valve seat (16) is connected with the water outlet channel (11) through the throttling sleeve (10), the valve seat (16) is internally connected with the main valve core (8), a first through hole (9) is formed in the upper part of the main valve core (8) from top to bottom, a main valve core inner cavity (8-1) is formed in the lower part, first through-flow hole (9) in-connection pilot valve core (7), valve rod (3) from the top down pass valve gap (2) and valve rod (3) lower extreme connection pilot valve core (7) upper end, second through-flow hole (6) have been seted up in valve barrel (5), have seted up first water conservancy diversion hole (13) on disk seat (16), have seted up third water conservancy diversion hole (12) on throttle cover (10), second through-flow hole (6), first water conservancy diversion hole (13) and third water conservancy diversion hole (12) all communicate with inhalant canal (15), third through-flow hole (17) and third through-flow hole (17) have been seted up downwards from the top in the upper portion of main valve core (8) and have been communicated with inhalant canal (15) through first through-flow hole (9), set up second water conservancy diversion hole (14) and second water conservancy diversion hole (14) on main valve core (8) and be located the below of second through-flow hole (6).
2. A desuperheating water regulating valve as defined in claim 1, wherein: the valve is characterized by further comprising a guide sleeve (4), an inner hole (2-1) is formed in the inner side of the lower portion of the valve cover (2), the guide sleeve (4) is connected in the inner hole (2-1), and the valve rod (3) penetrates through the guide sleeve (4) to be connected with the pilot valve core (7).
3. A desuperheating water regulating valve as defined in claim 1, wherein: the lower part of the pilot valve core (7) is provided with a lifting part (7-1), and the lifting part (7-1) is a circle of bulges.
4. A desuperheating water regulating valve as defined in claim 3, wherein: the lifting valve also comprises a gland (18), and the gland (18) is sleeved on the pilot valve core (7) on the lifting part (7-1).
5. The desuperheating water regulating valve as defined in claim 4, wherein: the upper part of the first through flow hole (9) is provided with threads, and the gland (18) is connected with the main valve core (8) through the threads.
6. A desuperheating water regulating valve as defined in claim 1, wherein: the pressure relief valve also comprises a pressure relief valve core, and the pressure relief valve core is connected inside the third through hole (17).
7. A desuperheating water regulating valve as defined in claim 1, wherein: the number of the second through holes (6) and the number of the third through holes (17) are both multiple, and the multiple third through holes (17) are distributed at equal intervals along the circumferential direction of the first through holes (9).
8. A desuperheating water regulating valve as defined in claim 1, wherein: the first guide hole (13) and the second guide hole (14) are both throttling holes.
9. A desuperheating water regulating valve as defined in claim 1, wherein: connecting hole (20) and pressure release hole (21) have been seted up in main valve core (8), pressure release hole (21) one end intercommunication second through-flow hole (6), and pressure release hole (21) other end intercommunication first through-flow hole (9), third through-flow hole (17) are through connecting hole (20) and first through-flow hole (9) intercommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021721895.5U CN213145538U (en) | 2020-08-18 | 2020-08-18 | Temperature-reducing water regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021721895.5U CN213145538U (en) | 2020-08-18 | 2020-08-18 | Temperature-reducing water regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213145538U true CN213145538U (en) | 2021-05-07 |
Family
ID=75740187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021721895.5U Active CN213145538U (en) | 2020-08-18 | 2020-08-18 | Temperature-reducing water regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213145538U (en) |
-
2020
- 2020-08-18 CN CN202021721895.5U patent/CN213145538U/en active Active
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