CN-122014908-A - Medium-cooled high-temperature ball valve

CN122014908ACN 122014908 ACN122014908 ACN 122014908ACN-122014908-A

Abstract

The invention relates to the technical field of high-temperature valves, and discloses a medium-cooled high-temperature ball valve which comprises a valve body, an integrated hollow valve ball body and a hollow valve rod, wherein a circumferential first cooling medium annular flow passage is arranged in the hollow valve ball body, the hollow valve rod is communicated with the flow passage, a jacket is arranged outside the valve body and forms a second cooling medium annular flow passage with the valve body, and rotary joints are arranged at two ends of the hollow valve rod and are connected into a circulating cooling system. The invention adopts the two-way cooperative cooling of the internal core cooling and the external global cooling, is matched with the external bearing, the shaft channeling limit structure and the piston type pre-tightening valve seat, can stably resist high temperature of 800 ℃ and above for a long time, has the advantages of high cooling efficiency, smooth opening and closing, reliable sealing, long service life, low manufacturing cost and the like, and is suitable for ultra-high temperature fluid control working conditions of thermal power generation, metallurgy, chemical industry and the like.

Inventors

Zhuo Chengkun
Zhuo Jiacheng
Zhuo Wubi
QU WENCAI
HONG ZHIJIE
LIANG WANLI

Assignees

上海罗杰斯阀门有限公司

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. A medium-cooled high-temperature ball valve comprises a valve body (1) and is characterized by further comprising a hollow valve ball body (16) and a hollow valve rod (13) which are connected into a whole, wherein the hollow valve ball body (16) is in sealing connection with a ball mounting groove (22) in the valve body (1), the hollow valve rod (13) is in rotary sealing connection with the valve body (1) and is driven to rotate by a driving mechanism (25), a first cooling medium annular flow passage (6) which is arranged along the circumferential direction of the hollow valve ball body (16) is arranged on the wall thickness of the hollow valve ball body (16), and the hollow valve rod (13) is communicated with the first cooling medium annular flow passage (6); a jacket (17) forming a second cooling medium annular flow passage (18) with the outer wall of the valve body (1) is arranged outside the valve body (1), and the hollow valve rod (13) and the jacket (17) are communicated with a circulating cooling medium system.
2. A medium-cooled high-temperature ball valve according to claim 1, wherein the hollow valve rod (13) is defined as a hollow valve rod medium inlet section (2) and a hollow valve rod medium outlet section (3), the hollow valve rod medium inlet section (2), the hollow valve ball (16) and the hollow valve rod medium outlet section (3) are sequentially connected into a whole, and the hollow valve rod medium inlet section (2) or the hollow valve rod medium outlet section (3) is connected with the driving mechanism (25).
3. A medium-cooled high-temperature ball valve according to claim 2, wherein the axis of the hollow valve rod medium inlet section (2) and the axis of the hollow valve rod medium outlet section (3) are coincident, the axis of the hollow valve rod medium inlet section (2) and the axis of the hollow valve ball (16) are distributed relatively vertically, the axis of the hollow valve rod medium outlet section (3) and the axis of the hollow valve ball (16) are distributed relatively vertically, and the axis of the hollow valve rod medium inlet section (2) and the axis of the hollow valve medium outlet section (3) are distributed symmetrically with the axis of the hollow valve ball (16).
4. A medium-cooled high temperature ball valve as in claim 3 wherein said first cooling medium annular flow passage (6) has a crescent-shaped single-sided cross section.
5. A medium-cooled high-temperature ball valve according to claim 1, characterized in that the hollow valve rod (13) has a medium inlet (26) and a medium outlet (27), a rotary joint (7) is connected to the medium inlet (26) and the medium outlet (27) of the hollow valve rod (13), respectively, and the rotary joint (7) is connected to the circulating cooling medium system.
6. The medium-cooled high-temperature ball valve as claimed in claim 5, wherein two ends of the hollow valve rod (13) respectively penetrate out of the valve body (1); Along hollow valve rod (13) are in one end in valve body (1) to hollow valve rod (13) stretch out in the other end direction outside valve body (1), be equipped with on valve body (1) cover packing subassembly (11) on hollow valve rod (13), and supply support (10) that packing subassembly (11) held, be fixed in support (10) and through bearing set (9) with support (8) of hollow valve rod (13) swivelling joint be equipped with on support (8) with hollow valve rod (13) are located advance medium mouth (26) or go out the outer wall outside medium mouth (27) and carry out unsmooth complex axle and scurrying limit structure, and axle scurrying limit structure's at least part is located support (8), the remaining part is located the outer wall of hollow valve rod (13).
7. The medium-cooled high-temperature ball valve of claim 6, wherein the shaft channeling limiting structure comprises a limiting piece (5) and a limiting groove (4), any one of the limiting piece (5) and the limiting groove (4) is arranged on the inner wall of the support (8), and the rest is arranged on the outer wall of the hollow valve rod (13).
8. A medium-cooled high-temperature ball valve according to claim 1, wherein the outer wall of the valve body (1) is provided with a plurality of annular grooves (23), the outer notch of each annular groove (23) is provided with a jacket (17), each jacket (17) and the annular groove (23) form a second cooling medium annular flow passage (18), and a medium inlet pipe (14) and a medium outlet pipe (15) which are symmetrically distributed on the jacket (17) along the axial line of the jacket (17) are arranged, and the medium inlet pipe (14) and the medium outlet pipe (15) are respectively communicated with the circulating cooling medium system.
9. The medium-cooled high-temperature ball valve as claimed in claim 1, wherein the valve body (1) is provided with a conveying channel (28), the middle part of the conveying channel (28) is provided with a ball installation groove (22), and two valve seats (20) which are respectively connected with the outer walls of the two ends of the hollow valve ball (16) in a movable contact manner are arranged in the ball installation groove (22); The middle part of delivery channel (28) is to its both ends extending direction, valve seat (20) with still be equipped with between valve body (1) and make valve seat (20) all the time movable contact hollow valve spheroid (16) outer wall's piston subassembly (19), the internal diameter of valve seat (20) equals hollow valve spheroid (16) internal diameter, and the internal diameter of hollow valve spheroid (16) equals piston subassembly (19) internal diameter, the internal diameter of piston subassembly (19) equals delivery channel (28) internal diameter.
10. A medium-cooled high temperature ball valve as in claim 9 wherein said piston assembly (19) comprises a spacing mounting step (24) located outside of said ball mounting groove (22), a piston ring (29) movably mounted on said spacing mounting step (24) in a socket joint with said valve seat (20), and a graphite packing ring (12) located in a space formed between said piston ring (29) and said valve seat (20), a compression spring (21) being provided between said spacing mounting step (24) and said piston ring (29) in an axial direction of said delivery passage (28).

Description

Medium-cooled high-temperature ball valve Technical Field The invention relates to the technical field of high-temperature valves, in particular to a medium-cooled high-temperature ball valve. Background The ball valve is used as a control component in a fluid conveying system, is widely applied to the fields of high-temperature working conditions such as thermal power generation, metallurgy, chemical industry and the like, and the development process is iterated continuously along with the upgrading of industrial equipment parameters. The early conventional ball valve is only suitable for low-temperature low-pressure working conditions, along with continuous improvement of single-machine capacity and parameter grade of a domestic thermal generator set, the high-temperature ball valve is made of heat-resistant metal, the high-temperature resistance is improved by optimizing a valve body structure, the high-temperature-resistant ball valve becomes a core component for controlling high-temperature medium conveying in a thermodynamic system, and the related technology is also continuously improved in material selection and sealing structure design, so that a technical system of the metal hard sealing high-temperature ball valve is gradually formed. For example, CN202210940032.4 discloses a ceramic hard-seal high-temperature ball valve, which comprises a left valve body, a valve front spring, a valve front compression ring, a valve front sealing ring, a valve front valve, a ball body, a right valve body, a valve rear spring, a valve rear compression ring, a valve rear limit sleeve, a valve rear sealing ring, a valve rear valve seat, a valve cover, a valve rod and a pressure self-sealing ring, wherein the service temperature of the high-temperature ball valve is limited to below 500 ℃, when the high-temperature ball valve is impacted by heat flow of 800 ℃ or higher, the strength of a metal valve body and a valve core can be greatly reduced, the phenomenon of metal softening can occur, the normal structural form and sealing performance can not be maintained, the sealing materials of the valve seat and the valve clack can be quickly aged and carbonized at a continuous high temperature, the sealing structure is extremely easy to burn out, so that high-temperature medium leakage is caused, serious potential safety hazards are caused, meanwhile, the valve parts are easy to be blocked and opened and closed normally due to the fact that the valve is easy to occur between the valve rod and a rotary connecting component due to uneven in thermal expansion caused by material and structural difference. In addition, the high temperature resistance of the ball valve is improved only by selecting a more heat-resistant metal material, so that the manufacturing cost of equipment is greatly increased, the resistance effect on high-temperature heat flow impact is limited, the problems of strength, sealing and opening and closing at high temperature cannot be fundamentally solved, and the use requirements of high-temperature working conditions of high-end equipment such as a large-scale thermal generator set are difficult to meet. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a medium-cooled high-temperature ball valve, which has the advantages of strong high temperature resistance, stable sealing, smooth opening and closing, long service life and controllable cost, realizes active cooling through a double-path circulating water cooling structure, and solves the problems of metal softening, sealing burning and thermal expansion blocking of the existing high-temperature ball valve at ultrahigh temperature. The medium-cooled high-temperature ball valve comprises a valve body, a hollow valve ball body and a hollow valve rod which are connected into a whole, wherein the hollow valve ball body is in sealing connection with a ball mounting groove in the valve body, the hollow valve rod is in rotary sealing connection with the valve body and is driven to rotate by a driving mechanism, a first cooling medium annular flow passage arranged along the circumferential direction of the hollow valve ball body is arranged on the wall thickness of the hollow valve ball body, the hollow valve rod is communicated with the first cooling medium annular flow passage, a jacket forming a second cooling medium annular flow passage with the outer wall of the valve body is further arranged outside the valve body, and the hollow valve rod and the jacket are communicated with a circulating cooling medium system. Preferably, the hollow valve rod is defined as a hollow valve rod medium inlet section and a hollow valve rod medium outlet section, the hollow valve rod medium inlet section, the hollow valve ball body and the hollow valve rod medium outlet section are sequentially connected into a whole, and the hollow valve rod medium inlet section or the hollow valve rod medium outlet section is connected with the driving me