CN-121993659-A - Angle type labyrinth sleeve regulating valve suitable for high pressure and various medium states

CN121993659ACN 121993659 ACN121993659 ACN 121993659ACN-121993659-A

Abstract

The invention relates to an angle type labyrinth sleeve regulating valve structure suitable for high pressure and various medium states. The existing multistage depressurization valve mostly adopts a structure of regulating valves connected in series with multistage orifice plates, the regulating precision of the valve is basically not ideal, and the regulating range is often smaller. The labyrinth disc assembly is arranged on a valve seat, the sleeve is downwards arranged along the inner wall of the labyrinth Gong Panpian assembly, the inner wall of the lower end of the sleeve is matched with the outer wall of the upper end of the valve seat, the sleeve compresses the upper plane of the labyrinth disc assembly, the valve rod is screwed into the thread of the upper end of the valve core assembly, so that the labyrinth disc assembly and the valve core assembly form the assembly, the labyrinth disc assembly are arranged inside the valve along the inner wall of the sleeve, the small hole patterns distributed on the side wall of the sleeve are divided into 3 layers, the lowest layer is a dense hole, the middle layer is a sparse hole, and the uppermost layer is a large hole. The invention can achieve the aim of reducing pressure by reducing pressure step by step, so that the opening degree of the valve is adjusted in one valve, the integral adjusting precision and adjustable range of the valve are improved, and the valve has good sealing property.

Inventors

WANG LIHUA
ZHENG RONGJING
ZHENG LINGYU
LIANG XU
CHENG LIANGCHENG
KANG XIAOHUI

Assignees

东辰智能科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (10)

1. The utility model provides an angle formula maze sleeve governing valve suitable for high pressure and multiple medium state, includes valve body (101), disk seat (102), valve rod (110), case subassembly, maze disc subassembly and sleeve, its characterized in that maze disc subassembly (200) are installed on disk seat (102), sleeve (104) are laid down along the inner wall of maze Gong Panpian subassembly (200), sleeve (104) lower extreme inner wall and disk seat (102) upper end outer wall cooperation, sleeve (104) compress tightly maze disc subassembly (200) upper plane, valve rod (110) screw in case subassembly (105) upper end screw thread department makes the two form the subassembly along sleeve (104) inner wall packing into inside the valve, the aperture pattern that distributes on the sleeve lateral wall is divided into 3 layers, and the lower floor is the closed pore, and the intermediate level is the loose pore, and the upper layer is the macropore.
2. The valve of claim 1, wherein the valve seat is a valve seat with cage structure and is disposed at the outlet of the valve.
3. The angle type labyrinth sleeve regulating valve suitable for high pressure and multiple medium states as claimed in claim 2, wherein a layer of valve cage is arranged at the lower end of the valve seat, and the surface of the valve cage is provided with small holes.
4. The angle type labyrinth sleeve regulating valve suitable for the high pressure and various medium states is characterized in that a metal C-shaped ring is arranged in a sealing groove of the valve core assembly, the metal C-shaped ring is formed by an open circular ring shell, and a hollow energy storage cavity is formed in the shell.
5. The angle type labyrinth sleeve regulating valve suitable for high pressure and various medium states according to claim 4, wherein a base material of the C-shaped ring is nickel-based superalloy Inconel718, and a silver plating layer is arranged on the outer portion of the base material of the metal C-shaped ring.
6. The angle type labyrinth sleeve regulating valve suitable for the high pressure and various medium states according to claim 1, wherein the labyrinth disc components are formed by stacking a plurality of groups of labyrinth unit components, spacing discs are arranged between adjacent labyrinth unit components, positioning holes are formed in each labyrinth unit component, and cylindrical pins are arranged in the positioning holes in a penetrating mode.
7. The valve of claim 6, wherein the labyrinth unit assembly comprises an inner disc, outer discs are respectively disposed on the upper and lower surfaces of the inner disc, and the inner disc and the outer disc have different flow channel structural designs.
8. An angular labyrinth sleeve regulator valve for high pressure and multiple media conditions as claimed in claim 7, comprising a first metal winding pad (103) placed at the bottom seal of the valve body (101), the valve seat (102) compressing the first metal winding pad (103).
9. The angle type labyrinth sleeve regulating valve suitable for the high pressure and various medium states according to claim 8 is characterized in that a second metal winding pad (106) is arranged on the upper end plane of the sleeve, the second metal winding pad (106) is tightly pressed by a compensation block (107), and a third metal winding pad (108) is further arranged on the upper plane of the compensation block (107).
10. An angular labyrinth sleeve regulator valve for high pressure and multiple media conditions as claimed in claim 9, wherein said third metal winding pad (108) is provided with a valve cover, the valve body and valve cover (109) being connected by a bolt fastener.

Description

Angle type labyrinth sleeve regulating valve suitable for high pressure and various medium states Technical Field The invention relates to the technical field of fluid control equipment, in particular to an angle type labyrinth sleeve regulating valve structure suitable for high pressure and multiple medium states. Background As the pressure and flow control of the thermal power plant is an important component, the process of the thermal power plant is continuously improved along with the continuous development of the market, and the requirements for high-pressure temperature parameters, multiple-station and multi-medium fluids are also more obvious. Aiming at high-pressure working condition parameters, the conventional valve mostly adopts a multi-stage orifice plate structure with an adjusting valve connected in series, and the purpose of reducing pressure is achieved by matching the orifice plate with the adjusting valve. However, most of the structural design can only be adjusted under a single working condition, the flow characteristic curve of the structural design is in nonlinear distribution in a 30% -70% opening range, and if a user adjusts the working condition, the valve is often not adjustable due to the non-adjustability of the orifice plate, so that the phenomenon of adjustment errors and non-adjustable parameters is caused. If the valve core and sleeve structure is adopted independently to adjust working condition parameters, under the working condition that the pressure difference between the front and the back of the valve exceeds 5MPa, the traditional regulating valve (such as a single-seat regulating valve, a sleeve regulating valve, a V-shaped ball valve and the like) often causes cavitation and cavitation of the medium at the sealing surface due to the too high flow rate of the medium at the sealing surface (often more than 100 m/s), so that the material at the sealing surface is damaged and falls off, and the whole service life of the valve is influenced. Particularly for high pressure parameter liquid media, the flow rate tends to increase sharply due to the throttling action of the valve, thus leading to downstream pressure lower than the saturated vapor pressure of the fluid, and the liquid can flash out gas due to the sudden drop of pressure, resulting in a medium of vapor-liquid two-phase flow. If bubbles in the vapor-liquid two-phase flow medium are broken, kinetic energy generated in a very short time can impact metal surfaces such as a valve core, a valve seat, a valve body and the like to damage the surfaces of the valve core, the valve seat, the valve body and the like, and finally, the sealing surface of the whole regulating valve is not tight, the valve body is damaged or leakage occurs, and scrapping or shutdown maintenance is needed. Meanwhile, most of the regulating valves on the market regulate fluid in a single state (such as liquid and gas), if the medium state is changed, such as changing from a gas medium to a liquid medium, a saturated medium and a two-phase flow medium, the conventional regulating valve is difficult to regulate, and even the valve core, the valve seat and other sealing elements are damaged. The problems of the prior art are as follows: 1. The problem of adjusting the precision of the adjusting valve caused by high pressure parameters is that the existing multi-stage pressure reducing valve mostly adopts an adjusting valve to be connected with a multi-stage orifice plate structure in series, the adjusting precision of the valve is basically not ideal due to the non-adjustability of an orifice plate, the adjusting range is often small, and the accurate adjustment of working conditions and the sharing of multiple working conditions are difficult to achieve. 2. The problems of too high medium flow speed, too large kinetic energy, cavitation working condition of the medium and the like caused by too large valve depressurization are that although the regulation precision can be improved by the conventional valve single-stage depressurization, the problems of too high medium flow speed, too large kinetic energy and the like caused by too large valve depressurization can be caused, and if the medium is liquid, the valve is impacted by flash evaporation and cavitation working condition. 3. Aiming at the fluid in various medium states, how to use a single valve to realize the adjustment of multiple working conditions is that the existing valve design is mostly aimed at the fluid in the single medium state, and if the fluid state changes, the original valve is often difficult to adjust. In particular, when the state of the medium is changed from a gaseous state to a liquid state, cavitation of the valve often occurs due to excessive single-stage pressure drop of the liquid. Disclosure of Invention Aiming at the problems in the prior art, the invention provides the angle type labyrinth sleeve regulating valve structure suitable for high pressure and various me