CN211398592U

CN211398592U - Double-seal valve for high-pressure high-temperature equal-fluid pipeline based on ball column embedded double-seal

Info

Publication number: CN211398592U
Application number: CN201921877658.5U
Authority: CN
Inventors: 苏昆焕; 陈亚景; 王智拓; 卓思思; 廖迪昕; 王炜杰
Original assignee: Quanzhou Zhongtian Petrochemical Machinery Manufacturing Co ltd
Current assignee: Quanzhou Zhongtian Petrochemical Machinery Manufacturing Co ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-09-01
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses a double-sealing valve for high-pressure high-temperature fluid pipelines based on ball column embedded double sealing in the technical field of pipeline valves, which comprises a valve body, wherein the left side and the right side of the valve body are respectively provided with a medium inlet and a medium outlet communicated to the inner cavity of the valve body, the top of the inner cavity of the valve body is provided with a valve core sleeve, the inner cavity of the valve core sleeve is communicated with the medium outlet, the inner cavity of the valve core sleeve is provided with a valve rod, the top of the valve rod is provided with a turntable handle, the bottom of the inner cavity of the valve body is provided with a valve core seat, the top of the valve core seat is provided with a column valve core in a butt joint way, the inner cavity of the column valve core is provided with a ball valve core, the top of the column valve core is connected with the bottom end of the valve rod, the double-sealing valve, and meanwhile, the occupied space of packaging and transportation can be reduced, and the packaging and transportation device is convenient to install and use in a narrow and limited space.

Description

Double-seal valve for high-pressure high-temperature equal-fluid pipeline based on ball column embedded double-seal

Technical Field

The invention relates to the technical field of pipeline valves, in particular to a double-seal valve for high-pressure high-temperature fluid pipelines based on ball column embedded double seals.

Background

The existing valve used for conveying high-temperature and high-pressure media on a pipeline comprises a valve body, wherein a media pipeline inlet and a media pipeline outlet are respectively formed in two sides of the valve body; the tail end of the medium pipeline inlet positioned in the valve body and the tail end of the medium pipeline outlet positioned in the valve body are respectively an inlet tail end and an outlet tail end; the inlet tail end and the outlet tail end are communicated with a cavity which is arranged in the center of the valve body in the vertical direction; in order to realize the communication and the cut-off of the medium pipeline inlet and the medium pipeline outlet, the prior valve is in primary seal, namely a valve core is used for closing or cutting off a flow channel between the medium pipeline inlet and the medium pipeline outlet; for high-temperature and high-pressure medium pipelines, the valve needs to realize reliable closing and cutting processes by increasing the process precision, the material quality and the grade of sealing materials, and has very high cost and low reliability.

Therefore, the improvement is made by those skilled in the relevant art, for example, the chinese patent application No. CN201510658775.2, "a valve for high temperature and high pressure pipeline", which summarizes the following points to be improved in practical application:

1. the device adopts a double-sealing structure combining plane sealing and conical surface sealing, wherein the outer wall of the second valve core playing a role in water surface sealing and the second valve seat are in fixed line contact sealing, and along with the increase of the accumulation of the use times, the contact part of the outer wall of the second valve core and the second valve seat is easy to wear, so that the sealing performance of the device is influenced;

2. the device is owing to adopt the double-valve rod structure, and first case and second case structurally need set up side by side in the axial for the whole high size of valve is great, leads to the device packing transportation occupation space big, and the device of not being convenient for is installed and is used in narrow and small limited space.

Based on the technical scheme, the invention designs the double-seal valve for the high-pressure high-temperature fluid pipeline based on the ball column embedded double-seal, so as to solve the problems.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide a double-seal valve for high-pressure high-temperature fluid pipelines and the like based on ball column embedded double seals, so as to solve the technical problem.

In order to realize the purpose, the invention provides the following technical scheme: the double-seal valve comprises a valve body, wherein a medium inlet and a medium outlet communicated to an inner cavity of the valve body are respectively formed in the left side and the right side of the valve body, a valve core sleeve is arranged at the top of the inner cavity of the valve body, the inner cavity of the valve core sleeve is communicated with the medium outlet, a valve rod is arranged in the inner cavity of the valve core sleeve, a turntable handle is arranged at the top of the valve rod, a valve core seat is arranged at the bottom of the inner cavity of the valve body, an inner hole of the valve core seat is communicated with the medium inlet, a column valve core is arranged on the top of the valve core seat in an abutting mode in a butting mode in the abutting mode in the top of the inner hole of the valve core seat, and the top of the column valve core is connected with the.

Preferably, an annular groove is formed in the bottom end of the outer wall of the valve rod, a split ring is arranged in the annular groove, a valve rod pressing sleeve is connected to the upper end of the inner cavity wall of the column valve core in a threaded mode, and the valve rod is connected with the column valve core through the fact that the valve rod pressing sleeve is abutted to the split ring.

Preferably, a valve core pressing sleeve, a disc spring and a ball valve core upper pressing seat are sequentially arranged in the inner cavity of the column valve core from top to bottom between the bottom end of the valve rod and the ball valve core, the bottom end of the inner cavity of the column valve core is in a closing structure, and the caliber of the closing structure is smaller than the diameter of the ball valve core.

Preferably, the lower end face of the column valve core and the upper end face of the valve core seat are both ground smooth sealing faces.

Preferably, the valve rod sleeve is sleeved on the outer wall of the top of the valve core sleeve, the lower end of the outer wall of the valve rod sleeve is connected with a lower pressing plate in a threaded mode, a packing gland and a sealing gasket are sleeved in the center of the top of the valve core sleeve, an upper pressing plate is arranged on the top of the packing gland, and the lower pressing plate and the valve body and the upper pressing plate and the valve body are connected in a locking mode through bolt fasteners.

Preferably, the upper end spiro union of valve rod has the internal thread sleeve pipe, the top of internal thread sleeve pipe with the carousel handle is connected, the outer wall of internal thread sleeve pipe through two sets of flat bearings with the telescopic inner chamber of valve rod rotates the installation, the telescopic top of valve rod is provided with and is used for compressing tightly fixedly flat bearing's sleeve end cover.

Preferably, a stop block is arranged in the middle of an inner cavity of the valve rod sleeve, and the inner ring and the outer ring of the stop block are respectively matched with the valve rod and the valve rod sleeve.

Preferably, the outer wall of the valve rod sleeve is provided with a lubricating oil injection nozzle, and the inner side of the lubricating oil injection nozzle is communicated with the plane bearing mounting cavity.

Compared with the prior art, the invention has the beneficial effects that:

the invention adopts a double-seal structure combining plane seal and spherical seal, drives a valve rod through a turntable handle to drive a column valve core to press downwards, so that the lower end surface of the column valve core is fully attached to the top surface of a valve core seat, and the lower end surface of the column valve core and the upper end surface of the valve core seat are both ground smooth seal surfaces which have a primary seal function after being attached to each other; the lower end of the inner cavity of the column valve core is provided with a ball valve core which can be abutted against the upper end edge of the inner hole of the valve core seat, after the column valve core is pressed down, the upper end edge of the inner hole of the valve core seat is plugged by the ball valve core, and a disc spring structure is arranged above the ball valve core and can be used as a pressing energy storage device to ensure that the ball valve core is fully abutted against the upper end edge of the inner hole of the valve core seat, so that a secondary sealing effect is achieved;

the ball valve core is in an independent state without a connecting structure in the inner cavity of the column valve core, and in the open state of the valve, the ball valve core is separated from the upper end edge of the inner hole of the valve core seat, the function of extrusion and rotation limitation is lost, and a medium fluid can sweep the bottom surface of the ball valve core when flowing through the inner cavity of the valve body, so that the ball valve core is driven to randomly rotate;

the ball valve core is arranged in the inner cavity of the column valve core, and a primary sealing structure formed by mutually attaching the lower end surface of the column valve core and the upper end surface of the valve core seat and a secondary sealing structure formed by fully abutting the upper ends of the inner holes of the ball valve core and the valve core seat are positioned in the same radial plane, so that the overall height of the valve is reduced on the premise of improving the sealing performance and prolonging the service life, the structure is more compact, the occupied space of packaging and transportation can be reduced, and the installation and use of the device in a narrow limited space are facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of the overall internal structure of the present invention;

FIG. 2 is a schematic view of the structure of part A in FIG. 1;

FIG. 3 is a schematic view of a spool construction according to the present invention;

fig. 4 is a schematic structural view of the valve core seat of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-valve body, 2-medium inlet, 3-medium outlet, 4-valve core sleeve, 5-valve rod, 6-rotary table handle, 7-valve core seat, 8-column valve core, 9-ball valve core, 10-split ring, 11-valve rod pressing sleeve, 12-valve core pressing sleeve, 13-disc spring, 14-ball valve core upper pressing seat, 15-grinding smooth sealing surface, 16-valve rod sleeve, 17-lower pressing plate, 18-packing gland, 19-sealing gasket, 20-upper pressing plate, 21-bolt fastener, 22-internal thread sleeve, 23-plane bearing, 24-sleeve end cover, 25-stop block and 26-oil injection nozzle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a fluid pipeline such as high pressure high temperature is with two sealing valves based on ball post inlays double containment mutually, including valve body 1, the left and right sides of valve body 1 is provided with respectively communicates to medium import 2 and the medium export 3 of its inner chamber, 1 inner chamber top of valve body is provided with case cover 4, the inner chamber and the medium export 3 intercommunication of case cover 4, the inner chamber of case cover 4 is provided with valve rod 5, the top of valve rod 5 is provided with carousel handle 6, the inner chamber bottom of valve body 1 is provided with case seat 7, the hole and the medium import 2 intercommunication of case seat 7, the top butt of case seat 7 is provided with post case 8, the inner chamber of post case 8 is provided with the ball valve core 9 along looks butt with the hole upper end of case seat 7, the top of post case 8 links to each other with 5 bottoms of.

Further, an annular groove is formed in the bottom end of the outer wall of the valve rod 5, a split ring 10 is arranged in the annular groove, a valve rod pressing sleeve 11 is connected to the upper end of the inner cavity wall of the column valve core 8 in a threaded mode, and the valve rod 5 is connected with the column valve core 8 through the fact that the valve rod pressing sleeve 11 is abutted to the split ring 10.

Further, the inner cavity of the column valve core 8 is arranged between the bottom end of the valve rod 5 and the ball valve core 9, from top to bottom, the valve core pressing sleeve 12, the disc spring 13 and the ball valve core upper pressing seat 14 are sequentially arranged, the bottom end of the inner cavity of the column valve core 8 is arranged in a closing structure, the diameter of the closing structure is smaller than the diameter of the ball valve core 9, and the disc spring 13 has good bearing capacity, so that the column valve core is very reliable in a high-temperature and high-pressure conveying environment, the disc spring 13 can serve as a pressing energy storage device, pressing pre-tightening force can be provided when the valve is closed, and the ball valve core 9 is ensured to be fully abutted against.

Further, the lower end face of the column valve core 8 and the upper end face of the valve core seat 7 are both ground smooth sealing faces 15, and the ground smooth sealing faces and the upper end faces are attached to each other to play a primary sealing role.

Further, a valve rod sleeve 16 is sleeved on the outer wall of the top of the valve core sleeve 4, a lower pressure plate 17 is screwed on the lower end of the outer wall of the valve rod sleeve 16, a packing gland 18 and a sealing gasket 19 are sleeved on the center of the top of the valve core sleeve 4, an upper pressure plate 20 is arranged on the top of the packing gland 18, and the lower pressure plate 17 and the valve body 1 and the upper pressure plate 20 and the valve body 1 are all in locking connection through bolt fasteners 21, so that the valve rod 5 and the valve core sleeve 4 are ensured to be kept sealed.

Further, an internal thread sleeve 22 is screwed at the upper end of the valve rod 5, the top end of the internal thread sleeve 22 is connected with the turntable handle 6, the outer wall of the internal thread sleeve 22 is rotatably installed with the inner cavity of the valve rod sleeve 16 through two groups of plane bearings 23, and a sleeve end cover 24 used for tightly pressing and fixing the plane bearings 23 is arranged at the top end of the valve rod sleeve 16.

Further, a stop block 25 is arranged in the middle of the inner cavity of the valve rod sleeve 16, the inner ring and the outer ring of the stop block 25 are respectively matched with the valve rod 5 and the valve rod sleeve 16, and when the rotary dial handle 6 drives the internal thread sleeve 22 to rotate, the valve rod 5 ascends or descends relative to the internal thread sleeve 22.

Further, a lubricating oil nozzle 26 is arranged on the outer wall of the valve rod sleeve 16, and the inner side of the lubricating oil nozzle 26 is communicated with the mounting cavity of the plane bearing 23 and is used for injecting lubricating grease into the mounting cavity of the plane bearing 23, so that the maintenance and the maintenance of the plane bearing 23 are facilitated.

One specific application of this embodiment is:

when the valve is closed, the turnplate handle 6 is manually rotated in the forward direction, the turnplate handle 6 and the internal thread sleeve 22 rotate together, because the threaded sleeve 22 is in threaded engagement with the valve stem 5, and the stop 25 is disposed between the valve stem 5 and the valve stem sleeve 16, therefore, when the turntable handle 6 rotates in the forward direction, the valve rod 5 moves downward, the column valve core 8 and the ball valve core 9 connected to the bottom end of the valve rod 5 move downward, and then make the lower terminal surface of post case 8 fully laminate with the up end of case seat 7, form the primary seal, the bottom of ball valve core 9 and the hole upper end of case seat 7 along the butt, the dish spring 13 that is arranged in the inner chamber of post case 8 can be as pushing down energy storage equipment, ensures that the hole upper end of ball valve core 9 and case seat 7 is along fully the butt, forms the secondary seal, and the medium circulation passageway between medium import 2 and the medium export 3 is blocked completely promptly.

When the valve is opened, the turnplate handle 6 is manually rotated reversely, the turnplate handle 6 rotates together with the medium inlet 22, the medium inlet 22 is in threaded fit with the valve rod 5, and the stop block 25 is arranged between the valve rod 5 and the valve rod sleeve 16, so that when the turnplate handle 6 rotates reversely, the valve rod 5 rises and moves along with the turnplate handle, the structures of the column valve core 8, the ball valve core 9 and the like connected to the bottom end of the valve rod 5 rise along with the turnplate handle, a gap channel is reserved between the outer wall of the column valve core 8 and the inner cavity wall of the valve core sleeve 4, the lower end face of the column valve core 8 is separated from the upper end face of the valve core seat 7, the bottom of the ball valve core 9 is separated from the upper end edge of the inner hole of the valve core seat.

In the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fluid pipeline uses double-seal valve such as high pressure high temperature based on ball post inlays double containment mutually, includes valve body (1), the left and right sides of valve body (1) is provided with medium import (2) and medium export (3) that feed to its inner chamber respectively, valve body (1) inner chamber top is provided with case cover (4), the inner chamber of case cover (4) with medium export (3) intercommunication, the inner chamber of case cover (4) is provided with valve rod (5), the top of valve rod (5) is provided with carousel handle (6), its characterized in that:

the valve core structure is characterized in that a valve core seat (7) is arranged at the bottom of an inner cavity of the valve body (1), an inner hole of the valve core seat (7) is communicated with the medium inlet (2), a column valve core (8) is arranged at the top of the valve core seat (7) in an abutting mode, a ball valve core (9) which is in abutting connection with the upper end of the inner hole of the valve core seat (7) is arranged in the inner cavity of the column valve core (8), and the top of the column valve core (8) is connected with the bottom end of the valve rod (5).

2. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 1, wherein: the valve rod (5) is characterized in that an annular groove is formed in the bottom end of the outer wall of the valve rod (5), a split ring (10) is arranged in the annular groove, a valve rod pressing sleeve (11) is connected to the upper end of the inner cavity wall of the column valve core (8) in a threaded mode, and the valve rod (5) is connected with the column valve core (8) through the fact that the valve rod pressing sleeve (11) is abutted to the split ring (10).

3. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 2, wherein: the inner cavity of the column valve core (8) is positioned between the bottom end of the valve rod (5) and the ball valve core (9), a valve core pressing sleeve (12), a disc spring (13) and a ball valve core upper pressing seat (14) are sequentially arranged from top to bottom, the bottom end of the inner cavity of the column valve core (8) is in a closing structure, and the caliber of the closing structure is smaller than the diameter of the ball valve core (9).

4. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 1, wherein: the lower end face of the column valve core (8) and the upper end face of the valve core seat (7) are both ground smooth sealing faces (15).

5. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 1, wherein: the valve core is characterized in that a valve rod sleeve (16) is sleeved on the outer wall of the top of the valve core sleeve (4), a lower pressing plate (17) is screwed on the lower end of the outer wall of the valve rod sleeve (16), a packing gland (18) and a sealing gasket (19) are sleeved in the center of the top of the valve core sleeve (4), an upper pressing plate (20) is arranged on the top of the packing gland (18), and the lower pressing plate (17) and the valve body (1) and the upper pressing plate (20) and the valve body (1) are both in locking connection through bolt fasteners (21).

6. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 5, wherein: the upper end spiro union of valve rod (5) has interior screw thread sleeve pipe (22), the top of interior screw thread sleeve pipe (22) with carousel handle (6) are connected, the outer wall of interior screw thread sleeve pipe (22) through two sets of flat bearing (23) with the inner chamber of valve rod sleeve (16) rotates the installation, the top of valve rod sleeve (16) is provided with and is used for compressing tightly fixedly sleeve end cover (24) of flat bearing (23).

7. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 6, wherein: a stop block (25) is arranged in the middle of an inner cavity of the valve rod sleeve (16), and the inner ring and the outer ring of the stop block (25) are matched with the valve rod (5) and the valve rod sleeve (16) respectively.

8. The double-seal valve for high-pressure high-temperature fluid pipelines based on the ball-column embedded double seal as claimed in claim 6, wherein: and a lubricating oil injection nozzle (26) is arranged on the outer wall of the valve rod sleeve (16), and the inner side of the lubricating oil injection nozzle (26) is communicated with the mounting cavity of the plane bearing (23).