CN217003102U - High-parameter integrated temperature and pressure reducing valve - Google Patents
High-parameter integrated temperature and pressure reducing valve Download PDFInfo
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- CN217003102U CN217003102U CN202220458175.7U CN202220458175U CN217003102U CN 217003102 U CN217003102 U CN 217003102U CN 202220458175 U CN202220458175 U CN 202220458175U CN 217003102 U CN217003102 U CN 217003102U
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Abstract
The utility model provides a high-parameter integrated temperature and pressure reducing valve which comprises a lower valve cover, a valve body, a valve clack, a valve seat, an upper valve cover, a valve rod and an actuating mechanism, wherein the valve seat is arranged in the valve body, the inner cavity of the valve body is divided into a steam inflow pipeline and a steam outflow pipeline by the valve seat, one end of the valve rod is connected with the actuating mechanism, the other end of the valve rod penetrates through the upper valve cover to be connected with the valve clack, the valve clack penetrates through the valve seat and is inserted into a slide-fit hole in a nozzle, the lower end of the valve body is fixedly provided with the lower valve cover, the lower valve cover is fixedly connected with the nozzle, and a throttling hole cover is sleeved outside the nozzle and forms a mixing cavity in the throttling hole cover; the mixing chamber is in communication with the steam outlet conduit via an orifice in the orifice housing 14. The beneficial effects of the utility model are as follows: adopt the combination formula temperature and pressure reduction valve that the integral type reduces temperature and pressure, the lumen is self sealss, multistage decompression etc. combines, solved traditional relief pressure valve + set up and realize reducing temperature and pressure in venturi flute tubular nozzle, have the temperature reduction effect not good, the problem of steam quality decline.
Description
Technical Field
The utility model relates to the field of temperature and pressure reducing valves, in particular to a high-parameter integrated temperature and pressure reducing valve.
Background
Along with the development of the national electric power energy industry, the requirements on the performance and parameters of the temperature and pressure reducing device are higher and higher, and more optimization and modification projects improve the design requirements on the temperature and pressure reducing device. Generally this kind of valve mostly is single relief pressure valve + sets up in venturi flute shape tubular nozzle and realizes reducing the temperature decompression, because nozzle department steam velocity of flow reduces along with the flow, and the steam velocity of flow also can reduce, and leads to the effect of reducing the temperature not good, and the atomizing vaporization length of reducing the temperature water increases, and the steam after even reducing the temperature often has water, causes the steam quality to descend.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a high-parameter integrated temperature and pressure reducing valve.
The object of the present invention is achieved by the following technical means. A high-parameter integrated temperature and pressure reducing valve comprises a lower valve cover, a valve body, a valve clack, a valve seat, an upper valve cover, a valve rod and an actuating mechanism, wherein the valve seat is arranged in the valve body, an inner cavity of the valve body is divided into a steam inflow pipeline and a steam outflow pipeline by the valve seat, one end of the valve rod is connected with the actuating mechanism, the other end of the valve rod penetrates through the upper valve cover to be connected with the valve clack, the valve clack penetrates through the valve seat and is inserted into a sliding hole in a nozzle, and the valve clack is connected with the valve seat in a matched mode and used for opening or closing a channel; a lower valve cover is fixed at the lower end of the valve body, a nozzle is fixedly connected to the lower valve cover, a throttling hole cover is sleeved outside the nozzle, and a mixing cavity is formed in the throttling hole cover; the lower valve cover is provided with a temperature-reducing water inflow pipeline which is communicated with the mixing cavity through a nozzle hole on the nozzle, and the mixing cavity is communicated with the steam outflow pipeline through a throttling hole on the throttling hole cover 14.
Furthermore, a support is fixedly connected above the valve body, and the actuating mechanism is fixed on the support.
Furthermore, the matching and sealing position of the upper valve cover and the valve body is provided with a corrugated asbestos gasket for steam, a backing ring, four open rings and a retaining ring, wherein the four open rings are tightly pressed on the backing ring and the corrugated asbestos gasket for steam, and the retaining ring is tightly pressed on the four open rings.
Furthermore, the lower valve cover is provided with a water draining joint which is communicated with the steam outflow pipeline through a pipeline.
Furthermore, a bush is arranged at the matching position of the sliding matching hole on the nozzle and the valve clack.
Furthermore, the valve seat is provided with hard alloy at the matching part of the valve seat and the valve clack.
Furthermore, the valve seat is provided with a U-shaped groove at the matching position of the valve seat and the valve body.
The beneficial effects of the utility model are as follows: traditional single relief pressure valve + sets up in venturi flute shape tubular nozzle realization temperature and pressure reduction, because nozzle department steam velocity of flow reduces along with the flow, the steam velocity of flow also can reduce, and leads to the temperature reduction effect not good, and the atomizing vaporization length of temperature reduction water increases, and steam after even the temperature reduction often has water, causes the steam degradation. In order to meet the actual requirements of high-parameter temperature and pressure reducing equipment, a high-parameter integrated temperature and pressure reducing valve is developed. The valve adopts a combined type temperature and pressure reducing valve combining integrated temperature and pressure reduction, self-sealing of a middle cavity, multi-stage pressure reduction and the like, and can realize regulation and control by adopting an electric, pneumatic, hydraulic and electro-hydraulic linkage actuating mechanism, the working pressure can reach 17MPa, and the working temperature can reach 550 ℃. The problem of traditional relief pressure valve + set up in venturi flute shape tubular nozzle realization temperature reduction decompression, it is not good to have the effect of reducing the temperature, steam quality decline is solved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of the lower valve cover assembly.
Fig. 3 is a schematic view of the valve seat structure.
Description of reference numerals: the device comprises a lower valve cover 1, a valve body 2, a valve clack 3, a valve seat 4, a U-shaped groove 4-1, an upper valve cover 5, a corrugated asbestos gasket 6 for steam, a backing ring 7, a four-open ring 8, a retainer ring 9, a valve rod 10, a support 11, an actuating mechanism 12, a nozzle 13, a nozzle hole 13-1, a slide matching hole 13-2, a throttling hole cover 14, a throttling hole 14-1, a drainage joint 15, a bushing 16, a reduced-temperature water inflow pipeline 17, a mixing cavity 18, a steam outflow pipeline 19, a steam inflow pipeline 20 and hard alloy 21.
Detailed Description
The utility model will be described in detail below with reference to the following drawings:
as shown in fig. 1-3, the high-parameter integrated temperature and pressure reducing valve comprises a lower valve cover 1, a valve body 2, a valve clack 3, a valve seat 4, an upper valve cover 5, a valve rod 10 and an actuating mechanism 12, wherein a support 11 is fixedly connected above the valve body 2, and the actuating mechanism 12 is fixed on the support 11. A valve seat 4 is arranged in the valve body 2, the valve seat 4 divides the inner cavity of the valve body 2 into a steam inflow pipeline 20 and a steam outflow pipeline 19, one end of the valve rod 10 is connected with the actuating mechanism 12, the other end of the valve rod 10 penetrates through the upper valve cover 5 to be connected with the valve clack 3, the valve clack 3 penetrates through the valve seat 4 and is inserted into a sliding assembly hole 13-2 on the nozzle 13, and the valve clack 3 is connected with the valve seat 4 in a matched mode and used for opening or closing a channel; the lower end of the valve body 2 is fixed with a lower valve cover 1, the upper part of the lower valve cover 1 is fixedly connected with a nozzle 13, and the temperature-reducing water flows through a lower valve cover component from a small flange at the joint of the lower valve cover and enters the nozzle. A throttling hole cover 14 is sleeved outside the nozzle 13, and a mixing cavity 18 is formed in the throttling hole cover 14; the lower valve cover 1 is provided with a temperature-reducing water inflow pipeline 17, the temperature-reducing water inflow pipeline 17 is communicated with a mixing cavity 18 through a nozzle hole 13-1 on the nozzle 13, and the mixing cavity 18 is communicated with a steam outflow pipeline 19 through a throttling hole 14-1 on the throttling hole cover 14.
The matched sealing position of the upper valve cover 5 and the valve body 2 is provided with a corrugated asbestos gasket 6 for steam, a backing ring 7, a four-open ring 8 and a check ring 9, the four-open ring 8 is tightly pressed on the backing ring 7 and the corrugated asbestos gasket 6 for steam, and the check ring 9 is tightly pressed on the four-open ring 8. The middle cavity of the utility model adopts a structure form that the pressure self-tightening type structure upper valve cover is matched with the self-sealing ring, and the valve rod and the actuating mechanism are transmitted by adopting a thrust type structure.
The valve seat 4 is provided with hard alloy 21 at the matching position with the valve clack 3, namely, the seal surface structure of the brake seat adopts a surfacing hard alloy surface to ensure the performance and the sealing property of the seal surface, and is provided with a U-shaped groove 4-1 (stress groove) to ensure the stress release and reduce and avoid the welding deformation of the seal surface.
The working principle is as follows: the valve adopts the Z-shaped structure, superheated steam realizes decompression through throttling of the valve clack 3 and the valve seat 4, the valve rod 10 is controlled by the actuating mechanism 12 to move up and down, the valve clack 3 is driven to be opened upwards or closed downwards, meanwhile, a bush 16 is arranged at the matching position of a sliding matching hole 13-2 on the nozzle 13 and the valve clack 3, and the valve clack is in sliding fit through surfacing hard alloy. The temperature-reducing water system controls temperature-reducing water to be sprayed into the inner cavity of the valve body along the nozzle hole through the nozzle connected with the lower valve cover so as to carry out mixed temperature reduction of the temperature-reducing water and steam. The pressure reduction control of the temperature and pressure reducing valve comprises two stages, namely, the first stage of pressure reduction is formed by lifting of a valve clack in a plunger type, and then the second stage of pressure reduction is carried out by a throttling hole cover 14. Therefore, the pressure and temperature adjusting capacity of the temperature and temperature reducing valve has better effect than that of the common single pressure reducing valve.
(1) The temperature and pressure reduction of the integrated type is used for mixing the temperature reduction water and the steam in the same valve body pressure bearing cavity, so that the temperature reduction effect is improved, the temperature reduction atomization vaporization length of the temperature reduction water is reduced, and the structural length of the whole temperature and pressure reduction device is greatly reduced.
(2) Adopt the second grade decompression structure, have more steady decompression effect, higher decompression ratio.
(3) The cooling water is sprayed in the mixing cavity in the throttling hole cover, so that the direct spraying in the pressure-bearing cavity of the valve body is avoided, the cold and hot alternating stress generated by the valve body is avoided, and the service life of the valve is prolonged. The throttling hole cover can realize the effect of reducing noise while realizing secondary pressure reduction, and avoids noise pollution.
(4) The throttling hole cover adopts a curved surface structure, so that expansion stress can be eliminated, and the service life of the throttling hole cover is prolonged.
(5) The middle cavity of the temperature and pressure reducing valve is sealed by adopting a self-sealing structure, so that the sealing performance is improved and the service life is prolonged.
(6) The valve seat of the temperature and pressure reducing valve is provided with the stress U-shaped groove, so that the welding stress is favorably eliminated, and the welding deformation of a sealing surface is reduced and avoided.
(7) The drain joint 15 is arranged on the lower valve cover 1, the drain joint 15 is communicated with the steam outflow pipeline 19 through a pipeline, and the drain joint is added to the lower valve cover, so that drain operation can be realized, and the safety of the valve is ensured.
(8) The inner hole of the lower valve cover bush is sprayed with hard alloy, so that the hardness of the lower valve cover bush is improved, and the service life of the lower valve cover bush is prolonged.
(9) The valve can be adjusted and controlled by adopting electric, pneumatic, hydraulic and electro-hydraulic linkage actuating mechanisms, can be remotely controlled and can also be operated on site, the automation degree is improved, and the maintenance and the debugging are convenient.
It should be understood that the technical solutions and the inventive concepts of the present invention should be equally replaced or changed by those skilled in the art to which the present invention pertains.
Claims (7)
1. The utility model provides a high parameter integral type pressure and temperature reduction valve which characterized in that: the steam-operated valve comprises a lower valve cover (1), a valve body (2), a valve clack (3), a valve seat (4), an upper valve cover (5), a valve rod (10) and an actuating mechanism (12), wherein the valve seat (4) is arranged in the valve body (2), the inner cavity of the valve body (2) is divided into a steam inflow pipeline (20) and a steam outflow pipeline (19) by the valve seat (4), one end of the valve rod (10) is connected with the actuating mechanism (12), the other end of the valve rod (10) penetrates through the upper valve cover (5) to be connected with the valve clack (3), the valve clack (3) penetrates through the valve seat (4) and is inserted into a sliding hole (13-2) in a nozzle (13), and the valve clack (3) is connected with the valve seat (4) in a matched mode and used for opening or closing a channel; a lower valve cover (1) is fixed at the lower end of the valve body (2), a nozzle (13) is fixedly connected to the lower valve cover (1), a throttling hole cover (14) is sleeved outside the nozzle (13), and a mixing cavity (18) is formed in the throttling hole cover (14); the lower valve cover (1) is provided with a temperature-reducing water inflow pipeline (17), the temperature-reducing water inflow pipeline (17) is communicated with a mixing cavity (18) through a nozzle hole (13-1) on a nozzle (13), and the mixing cavity (18) is communicated with a steam outflow pipeline (19) through a throttling hole (14-1) on a throttling hole cover (14).
2. The high parameter integrated pressure and temperature reducing valve of claim 1, wherein: the upper part of the valve body (2) is fixedly connected with a support (11), and the actuating mechanism (12) is fixed on the support (11).
3. The high parameter integrated pressure and temperature reducing valve of claim 1, wherein: the matching sealing position of the upper valve cover (5) and the valve body (2) is provided with a corrugated asbestos gasket (6) for steam, a backing ring (7), four open rings (8) and a check ring (9), wherein the four open rings (8) are tightly pressed on the backing ring (7) and the corrugated asbestos gasket (6) for steam, and the check ring (9) is tightly pressed on the four open rings (8).
4. The high parameter integrated pressure and temperature reducing valve of claim 1, wherein: the lower valve cover (1) is provided with a water draining joint (15), and the water draining joint (15) is communicated with a steam outflow pipeline (19) through a pipeline.
5. The high parameter integrated pressure and temperature reducing valve of claim 1, wherein: and a bush (16) is arranged at the matching part of the sliding matching hole (13-2) on the nozzle (13) and the valve clack (3).
6. The high parameter integrated pressure and temperature reducing valve of claim 1, wherein: and the matching part of the valve seat (4) and the valve clack (3) is provided with hard alloy (21).
7. The high parameter integrated pressure and temperature reducing valve of claim 1, wherein: the valve seat (4) is provided with a U-shaped groove (4-1) at the matching position with the valve body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220458175.7U CN217003102U (en) | 2022-03-03 | 2022-03-03 | High-parameter integrated temperature and pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220458175.7U CN217003102U (en) | 2022-03-03 | 2022-03-03 | High-parameter integrated temperature and pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217003102U true CN217003102U (en) | 2022-07-19 |
Family
ID=82395345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220458175.7U Active CN217003102U (en) | 2022-03-03 | 2022-03-03 | High-parameter integrated temperature and pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217003102U (en) |
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2022
- 2022-03-03 CN CN202220458175.7U patent/CN217003102U/en active Active
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