CN219774982U - Throttle pressure-reducing and temperature-reducing valve - Google Patents
Throttle pressure-reducing and temperature-reducing valve Download PDFInfo
- Publication number
- CN219774982U CN219774982U CN202320948607.7U CN202320948607U CN219774982U CN 219774982 U CN219774982 U CN 219774982U CN 202320948607 U CN202320948607 U CN 202320948607U CN 219774982 U CN219774982 U CN 219774982U
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- temperature
- case
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- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000009467 reduction Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Temperature-Responsive Valves (AREA)
Abstract
The utility model relates to the technical field of temperature reducing valves, in particular to a throttling, pressure reducing and temperature reducing valve. Including disk seat, valve cage, valve bonnet and case, the valve cage bottom with disk seat sealing connection, the valve cage top with valve bonnet sealing connection, valve cage lateral wall middle part is equipped with the throttle section, a plurality of orifices have been seted up to the throttle section, the valve cage is inside to be equipped with the case, the case passes the valve bonnet upwards extends and connects the valve rod, the case with clearance setting between the valve cage inner wall, the throttle section with clearance between the case is greater than the case with clearance between the inner wall of throttle section below. According to the utility model, the side wall of the valve core is provided with the throttling section, so that the gap between the throttling section and the valve core is enlarged; when the valve is small in opening, high-pressure water passes through the adjacent surface of the valve cage and the valve core, the structure plays a role in throttling and reducing pressure, and the situation that sealing is not tight is prevented from occurring due to overlarge pressure difference between the front part and the rear part of the valve in the starting and stopping process of the temperature reducing valve.
Description
Technical Field
The utility model relates to the technical field of temperature reducing valves, in particular to a throttling, pressure reducing and temperature reducing valve.
Background
In the actual operation process, the working medium of the reheat steam system of the steam turbine of the thermal power plant is water, and the reheater is a steam superheater which heats the low-pressure steam subjected to work again and reaches a certain temperature, and the reheater is a heater in the boiler for heating the steam from the steam turbine into superheated steam. The reheater functions in two ways: firstly, the humidity of the water vapor is reduced, which is beneficial to protecting the blades of the steam turbine; and secondly, the relative internal efficiency and the absolute internal efficiency of the steam turbine can be improved. However, when the unit is repeatedly started and stopped in the using process of the reheater, the pressure difference between the front and the rear of the valve is too large, so that the main sealing surface is easy to erode, oxide skin possibly exists in the pipeline, and the temperature and the pressure change fall off in the starting and stopping process, so that the sealing surface is crushed or sealed untight, and the economic benefit of the unit is influenced.
Therefore, it is necessary to provide a temperature reducing valve capable of effectively reducing the pressure by throttling and avoiding the excessive pressure difference between the front and the rear of the valve.
Disclosure of Invention
The utility model aims to provide a throttling, pressure reducing and temperature reducing valve which can effectively reduce the pressure and avoid overlarge pressure difference between the front part and the rear part of the valve in the starting and stopping process of the temperature reducing valve.
The utility model provides a throttling, depressurization and temperature reduction valve which comprises a valve seat, a valve cage, a valve cover and a valve core, wherein the bottom of the valve cage is in sealing connection with the valve seat, the top of the valve cage is in sealing connection with the valve cover, a throttling section is arranged in the middle of the side wall of the valve cage, a plurality of throttling holes are formed in the throttling section, the valve core is arranged in the valve cage, the valve core penetrates through the valve cover to extend upwards to be connected with a valve rod, a gap between the valve core and the inner wall of the valve cage is arranged, and the gap between the throttling section and the valve core is larger than the gap between the valve core and the inner wall below the throttling section.
Preferably, the clearance between the valve core and the inner wall below the throttling section is 0.05-0.15 mm, and the clearance between the throttling section and the valve core is 0.15-0.25 mm.
Preferably, a cavity is formed in the valve core, and balance holes are uniformly distributed in the top of the cavity along the circumference.
Preferably, a guiding surface is arranged on the periphery of the bottom of the valve core, an included angle between the guiding surface and the side wall of the valve cage is smaller than 90 degrees, and an attaching surface is arranged on the bottom of the valve seat corresponding to the guiding surface.
Preferably, the angle between the guide surface and the cage side wall is 30 °.
Preferably, the guide surface and the surface of the joint surface are both provided with a build-up layer.
Preferably, spigot positioning is adopted between the valve seat and the bottom of the valve cage, and between the top of the valve cage and the valve cover.
Preferably, a combined sealing ring is arranged between the top of the valve cage and the valve cover.
Preferably, a gap formed between the bottom of the valve core and the valve seat is a capacity expansion section.
The beneficial effects are that:
according to the utility model, the side wall of the valve core is provided with the throttling section, so that the gap between the throttling section and the valve core is enlarged; when the valve is small in opening, high-pressure water passes through the adjacent surfaces of the valve cage and the valve core, the structure plays a role in throttling and reducing pressure, the pressure difference between the front part and the rear part of the valve is prevented from being too large in the starting and stopping process of the temperature reducing valve, the main sealing surface is prevented from being eroded, and the condition of poor sealing is prevented.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of the overall structure of the present utility model;
FIG. 2 is a schematic partial cross-sectional view of the valve cartridge of the present utility model when moved up;
reference numerals illustrate:
1-valve seat, 2-valve cage, 3-valve cover, 4-valve core, 5-balance hole, 6-combined sealing ring, 7-cavity, 8-guide surface, 9-valve rod, 10-orifice, 11-spigot and 12-expansion section.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
1-2, the throttle pressure-reducing and temperature-reducing valve comprises a valve seat 1, a valve cage 2, a valve cover 3 and a valve core 4, wherein the bottom of the valve cage 2 is in sealing connection with the valve seat 1, the top of the valve cage 2 is in sealing connection with the valve cover 3, and a spigot 11 is adopted for positioning between the valve seat 1 and the bottom of the valve cage 2 and between the top of the valve cage 2 and the valve cover 3. A combined sealing ring 6 is arranged between the top of the valve cage 2 and the valve cover 3. The spigot 11 at the top of the valve seat 1 is upward, so that the strength of the valve seat 1 is enhanced, and deformation between the valve cage 2 and the valve seat 1 is avoided.
The middle part of the side wall of the valve cage 2 is provided with a throttling section, the throttling section is provided with a plurality of throttling holes 10, a valve core 4 is arranged in the valve cage 2, the valve core 4 penetrates through the valve cover 3 to extend upwards to be connected with a valve rod 9, a gap between the valve core 4 and the inner wall of the valve cage 2 is formed, and the gap between the throttling section and the valve core 4 is larger than the gap between the valve core 4 and the inner wall below the throttling section, so that a high-pressure medium plays a role in throttling and reducing pressure when entering the gap between the throttling section and the valve core 4. The clearance between the valve core 4 and the inner wall below the throttling section is 0.05-0.15 mm, and the clearance between the throttling section and the valve core 4 is 0.15-0.25 mm.
The valve core 4 is internally provided with the cavity 7, and balance holes 5 are uniformly distributed at the top of the cavity 7 along the circumference, so that the resistance of the valve core 4 during movement can be reduced, and the valve switch is smoother. The guide surface 8 is arranged on the periphery of the bottom of the valve core 4, the included angle between the guide surface 8 and the side wall of the valve cage 2 is smaller than 90 degrees, the bottom of the valve seat 1 is provided with the joint surface corresponding to the guide surface 8, the final sealing effect can be ensured, and meanwhile, when the valve is closed due to the angle of the guide surface 8, the end part of the valve core 4 is automatically centered, so that the guiding effect is achieved. Preferably, the guide surface 8 is at an angle of 30 ° to the side wall of the cage 2. The surface of the guide surface 8 and the surface of the joint surface are both provided with a build-up welding layer, so that the strength of the part is enhanced; the overlaying layer can prevent the adjacent interfaces from being matched and blocked by impurities to damage the structure when the high-pressure medium passes through the interfaces; the service life of each part is prolonged. The part of the inner wall of the valve cage 2 lower than the throttling section is provided with a surfacing layer, the corresponding outer wall of the valve core 4 is matched for hardening treatment, the situation that impurities are blocked between the valve cage 2 and the valve core 4 is prevented, the dead zone travel of a valve can be increased by the part of the inner wall of the valve cage 2 lower than the throttling section, and when the valve is at a small opening degree, a gap formed between the bottom of the valve core 4 and the valve seat 1 is a capacity expansion section 12. The expansion section 12 is matched with the gap between the throttling section and the valve core 4, plays a role in throttling and reducing pressure, reduces the pressure difference between the front and the back of the valve in the starting and stopping process of the temperature reducing valve, reduces the flushing of a high-pressure medium on the sealing surface of the valve core 4, and prolongs the service life of the valve.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (9)
1. The utility model provides a throttle pressure reduction and temperature reduction valve, its characterized in that includes disk seat, valve cage, valve bonnet and case, the valve cage bottom with disk seat sealing connection, the valve cage top with valve bonnet sealing connection, valve cage lateral wall middle part is equipped with the throttle section, a plurality of orifices have been seted up to the throttle section, the valve cage is inside to be equipped with the case, the case passes the valve bonnet upwards extends and connects the valve rod, the case with clearance setting between the valve cage inner wall, the throttle section with clearance between the case is greater than the case with clearance between the inner wall of throttle section below.
2. The throttling, depressurization and temperature-reduction valve according to claim 1 wherein a clearance between the valve core and an inner wall below the throttling section is 0.05-0.15 mm and a clearance between the throttling section and the valve core is 0.15-0.25 mm.
3. The throttling, depressurization and temperature-reduction valve according to claim 1, wherein a cavity is formed in the valve core, and balance holes are uniformly distributed in the top of the cavity along the circumference.
4. The throttling, depressurization and temperature-reduction valve according to claim 1, wherein a guiding surface is arranged on the periphery of the bottom of the valve core, an included angle between the guiding surface and the side wall of the valve cage is smaller than 90 degrees, and an attaching surface is arranged on the bottom of the valve seat corresponding to the guiding surface.
5. The throttling, depressurization and temperature-reduction valve of claim 4 wherein an angle between the guide surface and the cage sidewall is 30 °.
6. The throttling, depressurization and temperature-reduction valve according to claim 4 wherein a weld overlay is provided on both the guide surface and the faying surface.
7. The throttling, depressurization and temperature-reduction valve according to claim 1 wherein spigot positioning is employed between the valve seat and the bottom of the cage, and between the top of the cage and the valve housing.
8. The throttling, depressurization and temperature-reduction valve of claim 7 wherein a combined sealing ring is disposed between the top of the cage and the valve housing.
9. The throttling, depressurization and temperature-reduction valve according to claim 1 wherein a gap formed between the bottom of the valve core and the valve seat is a capacity expansion section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320948607.7U CN219774982U (en) | 2023-04-23 | 2023-04-23 | Throttle pressure-reducing and temperature-reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320948607.7U CN219774982U (en) | 2023-04-23 | 2023-04-23 | Throttle pressure-reducing and temperature-reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774982U true CN219774982U (en) | 2023-09-29 |
Family
ID=88132162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320948607.7U Active CN219774982U (en) | 2023-04-23 | 2023-04-23 | Throttle pressure-reducing and temperature-reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774982U (en) |
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2023
- 2023-04-23 CN CN202320948607.7U patent/CN219774982U/en active Active
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