CN107883020B - Three-way half ball valve for on-line pressurized overhaul based on normal operation of pipeline and overhaul method - Google Patents
Three-way half ball valve for on-line pressurized overhaul based on normal operation of pipeline and overhaul method Download PDFInfo
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- CN107883020B CN107883020B CN201711036940.6A CN201711036940A CN107883020B CN 107883020 B CN107883020 B CN 107883020B CN 201711036940 A CN201711036940 A CN 201711036940A CN 107883020 B CN107883020 B CN 107883020B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
- F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a three-way half ball valve based on-line pressurized overhaul of normal operation of a pipeline, which comprises a valve body and a hemispherical valve core; three channels are arranged in the valve body, and are a fluid inlet channel, a fluid outlet channel and an online maintenance channel respectively; a switch sealing pair matched and sealed with the hemispherical valve core is arranged in the fluid outflow channel; an overhaul sealing pair matched and sealed with the hemispherical valve core is arranged in the online overhaul channel; an overhaul sealing gland is arranged on the outer end surface of the online overhaul channel; the pressure relief component and the pressure gauge which are communicated with the online maintenance channel are arranged on the online maintenance channel; the hemispherical valve core is positioned in the valve cavity of the valve body, the rotating shaft of the hemispherical valve core is arranged on the valve body, and the rotating shaft is connected with the external driving device. The semi-ball valve based on the method also relates to an online under-pressure maintenance method. The invention can realize the on-line maintenance operation of the normal operation of the pipeline, solves the problem that the hemispherical valve or other valves in the prior market can not realize the on-line maintenance of the normal operation of the pipeline, reduces the maintenance cost, shortens the time of the maintenance operation, and reduces the labor intensity.
Description
Technical Field
The invention belongs to the technical field of hemispherical valves, and particularly relates to a three-way hemispherical valve for on-line pressurized overhaul based on normal operation of a pipeline and an overhaul method.
Background
Currently, valves are mechanical devices that control the flow, direction, pressure, temperature, etc. of a flowing fluid medium, and valve plumbing, like pumps in technology, is a fundamental component in piping systems and is a critical component for the regulation and control of piping on-off. The semi-ball valve is a new valve developed to solve the technological problem of conveying mixed flow medium of solution, ore pulp and other two phases. The semi-ball valve is a practical operation type product, the executing mechanism of the product is provided with the executing device, the operation of a user is more convenient and light, the remote automatic operation is realized, the application range of the semi-ball valve is developed, and the semi-ball valve is more creative under the condition of matching with an automatic computer operation under the condition of inconvenient manual operation or normally open operation in a severe environment. The semi-ball valve is successfully developed, and a reliable control valve is provided for the solution process flows of water service, chemical industry, petroleum, gas, metallurgy, electronics and other industrial departments, and is easy to precipitate, scale and precipitate to influence the process, so that a novel excellent product is provided for improving the industrial management equipment level in China. Therefore, the device is widely applied to ideal transmission equipment of water, steam, sewage, petrochemical industry, natural gas, two-phase media such as solution and ore pulp, dust gas and the like. The half ball valve can be used for adjusting and throttling besides being used for normally operating to be fully opened and fully closed, but the flowing direction of the medium is particularly noted so as to prevent the sealing surface from being eroded or being worn seriously.
The half ball valve has the characteristics of small opening force, good sealing performance, wear resistance and the like, and can break scaling barriers when closed. Has the following characteristics:
1. and (3) a straight-through type: the one-way sealing and eccentric structure is characterized in that the ball is separated from the valve body when the valve is opened, the flow passage is directly communicated, and the blocking and blocking phenomenon can not occur.
2. The switch is convenient: the spherical surface is separated from the valve body during opening and closing, no contact exists, the torque is small, the rotation is flexible, the scaling and adhesion on the sealing surface can be cut off under the shearing action of the hemispherical valve seat during opening and closing, and the sealing tightness can be kept.
3. The eccentric structure of the sealing surface enables the spherical surface to automatically compensate abrasion, keeps the sealing performance of the valve, and is long in service life, safe and reliable.
Currently, the classification of hemispherical valves is mainly divided into upper eccentric hemispherical valves and side eccentric hemispherical valves;
and (3) uploading an eccentric half ball valve: the valve with the eccentric semi-ball valve installed and disassembled from the upper part of the valve has the advantages that the valve can be replaced without being detached from a pipeline during maintenance, but the pipeline is required to stop running.
Side-mounted eccentric half ball valve: the internal structure is integrated, the internal parts are valves which are assembled and disassembled from the side surfaces, the pipeline is required to be closed to stop running during maintenance, and the whole valve is detached from the pipeline for maintenance.
In actual use, as the sealing pair is damaged or scratched due to abrasion or a sharp medium layer is contained in the medium, a gap is reserved between the valve core and the valve seat, so that the valve is leaked, the conventional half ball valve or other valves need to be maintained regularly, the related valves before and after the valve need to be closed and the supply of conveying medium is stopped when the conventional half ball valve or other valves are maintained, and then the conventional maintenance mode needs to stop the supply of pipeline medium and needs to be disassembled through heavy and professional tools, so that the maintenance time is overlong, the use of the half ball valve is seriously influenced, the workload of maintenance personnel is increased, and the work efficiency of the staff is reduced; the maintenance time is too long, so that the normal productivity is affected.
The prior art also discloses a three-way half ball valve, a patent number CN201320474351.7, a publication date 20140115 and a T-shaped three-way double eccentric half ball valve, the application number is CN201310239865.9, and the publication date 20130904;
a three-way half ball valve is characterized in that the valve is of a three-way structure, wherein a first channel is a feed inlet, a second channel is a through discharge outlet, and a third channel is a bypass discharge outlet. When the handle is pulled clockwise, the valve shaft and the hemispherical valve core are driven by the sleeve to rotate clockwise, the bypass discharge port III is closed, and the first feed port and the second straight-through discharge port II are communicated; when the handle is pulled in the anticlockwise direction, the valve shaft and the hemispherical valve core are driven by the sleeve to rotate 90 degrees in the anticlockwise direction, the through discharge port II is closed, and the first feed port and the second bypass discharge port II are connected. According to the patent literature, the existing three-way unloading ball valve is mainly characterized in that slurry medium is easy to enter due to the gap between a valve core (a three-way ball body) and a valve body, the valve core (the three-way ball body) and the valve body are adhered together after drying, and when the valve core (the three-way ball body) is rotated again, the resistance is very large, so that the valve cannot be opened; the three-way hemispherical valve described in the patent document cannot be overhauled on line under the condition of normal operation.
A T-shaped three-way double eccentric half ball valve, the application number of which is CN201310239865.9, and the publication date is 20130904; the valve body is provided with three orthogonal channels, wherein two channels A, C which are mutually perpendicular are respectively provided with valve seats, the valve core of the integrated structure is provided with two spherical sealing surfaces which are mutually 45 degrees and respectively form a sealing pair with the valve seats arranged in the channels A, C, and the spherical centers of the two spherical surfaces are respectively deviated from one side of the rotation center of the valve shaft. When the valve core rotates anticlockwise around O under the drive of the valve shaft, the spherical surface a of the valve core is tightly contacted with the valve seat A and wedged and self-locked, so that forced sealing is realized; the valve forms an L-shaped channel communicated with B-C. When the valve core rotates 45 degrees clockwise around O under the drive of the valve shaft, the spherical surface C of the valve core is tightly contacted with the valve seat C and wedged and self-locked, so that forced sealing is realized; at the moment, the valve C channel is closed to form a through channel communicated with A and B; the three-way hemispherical valve described in the patent document cannot be overhauled on line under the condition of normal operation.
The eccentric hemisphere valve of the prior art is installed and disassembled from the upper part of the valve, but the eccentric hemisphere valve can be overhauled on line under the condition that normal operation can not be realized.
Therefore, the invention provides the three-way half ball valve for on-line pressurized overhaul based on the normal operation of the pipeline and the overhaul method.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a three-way half ball valve and an overhauling method for overhauling parts in a half ball valve under the condition that a pipeline normally operates under pressure without being detached from the pipeline.
The invention adopts the technical proposal for solving the technical problems in the prior art that:
a three-way half ball valve based on pipeline normal operation on-line pressurized overhaul comprises a valve body and a hemispherical valve core; the method is characterized in that: three channels are arranged in the valve body, and are a fluid inlet channel, a fluid outlet channel and an online maintenance channel respectively; the fluid inlet channel, the fluid outlet channel and the online maintenance channel are respectively communicated with the valve cavity of the valve body;
a switch sealing pair matched and sealed with the hemispherical valve core is arranged in the fluid outflow channel; the switch sealing pair comprises a switch static seal and a switch dynamic seal, the switch static seal is fixedly arranged in the fluid outflow channel, and the switch dynamic seal is arranged on the hemispherical valve core; the static seal of the switch in the fluid outflow channel is matched with the dynamic seal of the switch on the hemispherical valve core to form a switch seal pair; an overhaul sealing pair matched and sealed with the hemispherical valve core is arranged in the online overhaul channel;
the overhaul sealing pair comprises an overhaul static seal and an overhaul dynamic seal; the overhauling static seal is arranged in the online overhauling channel, and the overhauling dynamic seal is arranged on the hemispherical valve core; the overhauling static seal in the online overhauling channel is matched with the overhauling dynamic seal on the hemispherical valve core to form an overhauling sealing pair; an overhaul sealing gland is arranged on the outer end surface of the online overhaul channel; the pressure relief component communicated with the online maintenance channel and the pressure gauge for detecting whether pressure exists in the maintenance channel in the maintenance state are arranged on the online maintenance channel; the hemispherical valve core is positioned in the valve cavity of the valve body, the hemispherical valve core is arranged on the valve body through a rotating shaft, and the rotating shaft is connected with an external driving device; in the cut-off working state, the sealing surfaces of the switch static seal and the switch dynamic seal of the switch sealing pair are attached to form a cut-off sealing structure; in the maintenance working state, the liquid in the online maintenance channel is emptied through the pressure relief component; the overhauling static seal of the overhauling sealing pair is attached to the sealing surface of the overhauling dynamic seal to form an overhauling sealing structure; and opening the maintenance sealing gland, and exposing the switch dynamic seal of the switch sealing pair in the online maintenance channel.
The invention can also adopt the following technical measures:
preferably, the switch static seal comprises an outlet valve body sealing seat; the outlet valve body sealing seat is detachably and fixedly arranged on the valve body through the sealing pressing seat; an outlet metal sealing surface which is in dynamic sealing fit with a switch on the hemispherical valve core is arranged on the outlet valve body sealing seat; a sealing ring is arranged between the sealing pressing seat, the outlet valve body sealing seat and the valve body; the switch dynamic seal comprises a spherical crown which is arranged on the hemispherical valve core through a fastener, and a switch elastic dynamic seal element is arranged between the spherical crown and the hemispherical valve core; and when the switch elastic dynamic sealing element is attached to the sealing surface of the outlet sphere of the outlet valve body sealing seat, a switch sealing pair is formed.
Preferably, the sealing ring adopts a tyre type sealing ring and comprises a tyre type sealing body, wherein a pressurizing compensation port is arranged on the tyre type sealing body, and a pressurizing compensation port mounting hole is arranged on the valve body.
Preferably, the maintenance static seal comprises a maintenance seal seat, the maintenance seal seat is fixedly connected with the valve body, and a maintenance elastic static seal element is arranged at the valve cavity of the valve body at the lower end of the maintenance seal seat; an overhaul dynamic seal is arranged below the switch dynamic seal on the hemispherical valve core, and is an overhaul metal sealing surface integrated with the hemispherical valve core; when the ball body overhauling sealing surface on the half ball valve core is attached to the overhauling elastic static sealing element on the overhauling sealing seat, an overhauling sealing pair is formed.
Preferably, the overhauling elastic static sealing element is a tyre sealing element and comprises a tyre sealing body, wherein a pressurizing compensation opening is formed in the tyre sealing body, a wedge-shaped surface is formed in the tyre sealing body, and an installation hole for the pressurizing compensation opening is formed in the outer end face of the overhauling sealing seat.
Preferably, the overhaul static seal comprises an overhaul seal seat which is fixedly connected with the valve body, and the lower end of the overhaul seal seat is provided with an overhaul static metal sealing surface; an overhaul dynamic seal is arranged below the switch dynamic seal on the hemispherical valve core, and comprises an overhaul elastic dynamic seal element which is arranged on the hemispherical valve core; and when the overhauling elastic dynamic sealing element is attached to an overhauling static sealing surface at the lower end of the overhauling sealing seat, an overhauling sealing pair is formed.
Preferably, the overhauling elastic dynamic seal is vulcanized on the hemispherical valve core.
Preferably, at least two lifting rings are uniformly distributed on the upper end surface of the overhaul sealing gland; the two lifting rings and the connecting hole on the overhauling sealing pressure cover are positioned on the same circumference.
Preferably, a skirt is arranged on the outer side of the valve body along the flowing direction of the fluid.
The invention also provides a pipeline pressurized on-line maintenance method based on the three-way half ball valve, wherein the pipeline comprises a pipeline before a valve, a pipeline after the valve and the three-way half ball valve arranged between the pipeline before the valve and the pipeline after the valve, and the three-way half ball valve is adopted by the three-way half ball valve; when judging that the switching elastic dynamic sealing element of the three-way half ball valve is damaged, the switching elastic dynamic sealing element is overhauled under the condition that a pipeline is pressurized, and the specific overhauling method comprises the following steps of:
the method comprises the steps that firstly, an external driving device is started, a lower hemispherical valve core is driven to rotate around a rotating shaft by the external driving device, at the moment, an overhaul moving seal of the hemispherical valve core is attached to an overhaul static seal in an online overhaul channel to form an overhaul sealing structure, and the overhaul sealing structure is in an overhaul working state at the moment;
the second step, the pressure relief component is opened outside the valve body, the pressure of the on-line maintenance channel is emptied through the pressure relief component, and the pressure of the maintenance channel is zero after the pressure of the on-line maintenance channel is emptied;
thirdly, a fastening bolt of the maintenance sealing cover is opened from the outside of the valve body, the maintenance sealing cover is removed, the whole online maintenance channel is exposed, and at the moment, the switch elastic dynamic sealing piece is exposed in the online maintenance channel;
step four, sequentially disassembling the spherical crown and the switch elastic dynamic sealing element by using a disassembling tool, and removing the damaged switch elastic dynamic sealing element;
fifthly, cleaning the mounting end face of the dynamic seal of the switch;
a sixth step of replacing a new switch elastic dynamic sealing element, and installing a spherical cap gland on the upper part of the switch elastic dynamic sealing element and locking;
seventh, installing and overhauling a sealing gland and closing a pressure release member;
eighth, reversely starting the external driving device again, driving the lower hemispherical valve core to rotate around the rotating shaft in the reverse direction until the switch static seal is achieved, and at the moment, attaching the switch elastic moving seal piece to a sealing surface of the switch static seal on the valve body to form a cut-off seal structure;
a ninth step of detecting whether leakage exists or not by a pressure gauge in a state of maintaining the eighth step; if the leakage does not occur, restarting the external driving device to open the hemispherical valve core according to the actually required opening degree; if the leakage occurs, repeating the first step to the eighth step until the detection is qualified.
The invention has the advantages and positive effects that: by adopting the technical scheme, the purpose of rapidly disassembling, assembling and overhauling the sealing pair under the normal working condition of the pipeline can be achieved. The three channels of the half ball valve are a fluid inlet channel, a fluid outlet channel and an online maintenance channel respectively; the fluid inlet channel, the fluid outlet channel and the online maintenance channel are respectively communicated with the valve cavity of the valve body; a switch sealing pair matched and sealed with the hemispherical valve core is arranged in the fluid outflow channel; an overhaul sealing pair matched and sealed with the hemispherical valve core is arranged in the online overhaul channel; an overhaul sealing gland is arranged on the outer end surface of the online overhaul channel; the pressure release component communicated with the online overhaul channel and the pressure gauge for detecting whether pressure exists in the overhaul channel in an overhaul state are arranged on the online overhaul channel, and the pressure is emptied through the pressure release component; therefore, maintenance operation can be carried out in the non-pressure state of the bypass channel under the condition that the normal operation of the main pipeline is not affected, the maintenance difficulty is reduced, and the safety is improved; in the cut-off working state, the sealing surfaces of the switch static seal and the switch dynamic seal of the switch sealing pair are attached to form a cut-off sealing structure; firstly, pressure relief is carried out through a pressure relief component; then opening the maintenance sealing gland, and exposing the switch dynamic seal of the switch sealing pair in the bypass channel; furthermore, maintenance personnel can realize online maintenance operation under normal operation of the pipeline; compared with the traditional hemispherical valve, the problem that the hemispherical valve in the market at present cannot realize on-line overhaul under the normal operation of the pipeline is solved, and the difficulty that other valves, such as a gate valve, a butterfly valve, a ball valve, a stop valve and the like cannot realize the overhaul under the normal operation of the pipeline is solved; therefore, the invention reduces the maintenance cost without affecting the normal transportation of the fluid medium, shortens the maintenance operation time, reduces the labor intensity and avoids the problem of productivity reduction caused by stopping the medium supply of the traditional valve.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 3a is a schematic diagram of a pressure relief member and pressure gauge directly disposed on an on-line service aisle;
fig. 4 is an enlarged view of the section I in fig. 3.
FIG. 5 is a schematic view of the open configuration of the present invention;
FIG. 6 is a schematic view of an as-inspected structure of the present invention;
FIG. 7 is an enlarged view of section II of FIG. 6;
FIG. 8 is a cross-sectional view C-C of FIG. 6;
FIG. 9 is an enlarged view of part of IV of FIG. 8;
FIG. 10 is a schematic view of the service elastomeric static seal of FIG. 9;
FIG. 11 is a cross-sectional view B-B of FIG. 2;
FIG. 12 is an enlarged view of part III of FIG. 11;
FIG. 13 is a schematic view of the seal ring of FIG. 11;
FIG. 14 is a schematic structural view of embodiment 2;
FIG. 15 is a schematic structural view of embodiment 3;
FIG. 16 is a schematic view of the structure of embodiment 4;
fig. 17 is a schematic view of the use state structure of the present invention.
In the figure: 1. a valve body; 1-1, fluid entering the channel; 1-20, a switch sealing pair; 1-21, static sealing of a switch; 1-210, an outlet valve body sealing seat; 1-211, a sealing pressing seat; 1-212, an outlet metal sealing surface; 1-213, sealing ring; 1-2130, a tyre-type sealing body; 1-2131, a boost compensation port; 1-22, dynamic sealing of a switch; 1-220, spherical cap; 1-221, a switch elastic dynamic seal; 1-2, fluid outflow channel; 1-3, an online overhaul channel; 1-30, overhauling a sealing pair; 1-31, overhauling static seal; 1-310, overhauling a sealing seat; 1-311, overhauling an elastic static sealing element; 1-3110, a tyre-type seal; 1-3111, boost compensation port; 1-3112, wedge faces; 1-32, overhauling dynamic seal; 2. a hemispherical valve core; 2-1, a rotating shaft; 3. overhauling a sealing gland; 4. a pressure relief member; 5. a pressure gauge; 6. a hanging ring; 7. a skirt band; 8-1, a valve front pipeline; 8-2, a valve front pipeline; 9. an external driving device.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
a switch sealing pair 1-20 which is matched and sealed with the hemispherical valve core is arranged in the fluid outflow channel 1-1; the switch sealing pair 1-20 comprises a switch static seal 1-21 and a switch dynamic seal 1-22, wherein the switch static seal 1-21 is fixedly arranged in the fluid outflow channel 1-2, and the switch dynamic seal 1-22 is arranged on the hemispherical valve core 2; the static seal of the switch in the fluid outflow channel is matched with the dynamic seal of the switch on the hemispherical valve core to form a switch seal pair; an overhaul sealing pair 1-30 which is matched and sealed with the hemispherical valve core 2 is arranged in the online overhaul channel; the overhaul sealing pair 1-30 comprises an overhaul static seal 1-31 and an overhaul dynamic seal 1-32; the overhauling static seal 1-30 is arranged in the online overhauling channel 1-3, and the overhauling dynamic seal 1-32 is arranged on the hemispherical valve core 2; the overhauling static seal in the online overhauling channel is matched with the overhauling dynamic seal on the hemispherical valve core to form an overhauling sealing pair; an overhaul sealing gland 3 is arranged on the outer end surface of the online overhaul channel; the online maintenance channel is provided with a pressure release member 4 communicated with the online maintenance channel and a pressure gauge 5 for detecting whether pressure exists in the maintenance channel in a maintenance state, wherein the pressure release member is preferably a ball valve; the pressure release member 4 and the pressure gauge 5 can be directly arranged on an online maintenance channel (as shown in fig. 3 a) or can be arranged on a maintenance sealing gland, and in the embodiment, the pressure release member is arranged on the maintenance sealing gland, the hemispherical valve core 2 is positioned in a valve cavity of the valve body, the hemispherical valve core is arranged on the valve body through a rotating shaft 2-1, and the rotating shaft is connected with an external driving device; in the cut-off working state, the sealing surfaces of the switch static seal 1-21 and the switch dynamic seal 1-22 of the switch sealing pair 1-20 are attached to form a cut-off sealing structure; in the maintenance working state, the liquid in the online maintenance channel is emptied through the pressure relief component; the overhauling static seal 1-31 of the overhauling sealing pair 1-30 is attached to the sealing surface of the overhauling dynamic seal 1-32 to form an overhauling sealing structure; the overhaul sealing gland 3 is opened, and the switch dynamic seals 1-22 of the switch sealing pairs 1-20 are exposed in the online overhaul channel.
Preferably, the static switch seal 1-21 comprises an outlet valve body seal seat 1-210; the outlet valve body sealing seat is detachably and fixedly arranged on the valve body 1 through the sealing pressing seat 1-211; the outlet valve body sealing seat 1-210 is provided with an outlet metal sealing surface 1-212 which is in dynamic sealing fit with a switch on the hemispherical valve core; a sealing ring 1-213 is arranged between the sealing pressing seat, the outlet valve body sealing seat and the valve body; the switch dynamic seal 1-22 comprises a spherical crown 1-220 which is arranged on the hemispherical valve core through a fastener, and a switch elastic dynamic seal element 1-221 is arranged between the spherical crown and the hemispherical valve core; and when the switch elastic dynamic sealing element is attached to the sealing surface of the outlet sphere of the outlet valve body sealing seat, a switch sealing pair is formed.
Preferably, the overhaul static seal 1-31 comprises an overhaul seal seat 1-310, the overhaul seal seat is fixedly connected with the valve body 1, and an overhaul elastic static seal element 1-311 is arranged at a valve cavity of a valve body at the lower end of the overhaul seal seat; an overhaul dynamic seal 1-312 is arranged below the switch dynamic seal on the hemispherical valve core 2, and is an overhaul metal sealing surface integrated with the hemispherical valve core; when the ball body overhauling sealing surface on the half ball valve core is attached to the overhauling elastic static sealing element on the overhauling sealing seat, an overhauling sealing pair is formed.
Preferably, in order to facilitate hoisting and ensure uniform stress during hoisting, at least two hoisting rings 6 are uniformly distributed on the upper end surface of the overhaul sealing gland 3; in order to avoid not affecting the overall strength of the gland, the lifting ring and the connecting hole on the overhauling gland 3 are positioned on the same circumference.
Preferably, in order to improve the strength of the valve body and the aesthetic effect of the valve body, a skirt 7 is provided on the outer side of the valve body in the flow direction of the fluid.
The invention can also adopt the following technical measures:
preferably, the sealing ring adopts a tyre type sealing ring 1-213, and comprises a tyre type sealing body 1-2130, wherein the tyre type sealing body is provided with a pressurizing compensation port 1-2131, and the valve body is provided with a pressurizing compensation port mounting hole; please refer to fig. 11 to fig. 13.
Preferably, the overhauling elastic static sealing element 1-311 is a tyre sealing element and comprises a tyre sealing body 1-3110, wherein the tyre sealing body is provided with a pressurizing compensation opening 1-3111, in order to avoid separation of the sealing body caused by overlarge pressure, the tyre sealing body 1-3110 is provided with a wedge-shaped surface 1-3112, and the outer end surface of the overhauling sealing seat is provided with a mounting hole for the pressurizing compensation opening. Please refer to fig. 8 to 10.
In embodiment 2, referring to fig. 14, it is preferable that the overhauling static seal 1-31 comprises an overhauling seal seat 1-310, wherein the overhauling seal seat is fixedly connected with the valve body 1, and an overhauling static metal sealing surface is arranged at the lower end of the overhauling seal seat; an overhaul dynamic seal 1-312 is arranged below the switch dynamic seal on the hemispherical valve core, the overhaul dynamic seal 1-32 comprises an overhaul elastic dynamic seal element 1-320, and the overhaul elastic dynamic seal element is arranged on the hemispherical valve core; and when the overhauling elastic dynamic sealing element is attached to an overhauling static sealing surface at the lower end of the overhauling sealing seat, an overhauling sealing pair is formed.
In this embodiment, preferably, the overhauling elastic dynamic seal is vulcanized on the hemispherical valve core. The tyre type sealing element can also be embedded on the hemispherical valve core and comprises a tyre type sealing body, wherein the tyre type sealing body is provided with a pressurizing compensation opening, and the outer end surface of the hemispherical valve core is provided with a mounting hole for the pressurizing compensation opening.
In embodiment 4, in this embodiment, the sealing surface of the spherical cap mounted on the hemispherical valve element may also be a metal sealing surface, as shown in fig. 16. The rest of the structure is the same as in embodiment 3.
The invention also provides a pipeline pressurized on-line maintenance method based on the three-way half ball valve, wherein the pipeline comprises a pipeline 8-1 before the valve, a pipeline 8-2 after the valve and the three-way half ball valve arranged between the pipeline before the valve and the pipeline after the valve, and referring to FIG. 17, the three-way half ball valve is adopted by the three-way half ball valve; when judging that the switching elastic dynamic sealing element of the three-way half ball valve is damaged, the switching elastic dynamic sealing element is overhauled under the condition that a pipeline is pressurized, and the specific overhauling method comprises the following steps of:
the method comprises the steps that firstly, an external driving device is started, a lower hemispherical valve core is driven to rotate around a rotating shaft by the external driving device, at the moment, an overhaul moving seal of the hemispherical valve core is attached to an overhaul static seal in an online overhaul channel to form an overhaul sealing structure, and the overhaul sealing structure is in an overhaul working state at the moment;
the second step, the pressure relief component is opened outside the valve body, the pressure of the on-line maintenance channel is emptied through the pressure relief component, and the pressure of the maintenance channel is zero after the pressure of the on-line maintenance channel is emptied;
thirdly, a fastening bolt of the maintenance sealing cover is opened from the outside of the valve body, the maintenance sealing cover is removed, the whole online maintenance channel is exposed, and at the moment, the switch elastic dynamic sealing piece is exposed in the online maintenance channel;
step four, sequentially disassembling the spherical crown and the switch elastic dynamic sealing element by using a disassembling tool, and removing the damaged switch elastic dynamic sealing element;
fifthly, cleaning the mounting end face of the dynamic seal of the switch;
a sixth step of replacing a new switch elastic dynamic sealing element, and installing a spherical cap gland on the upper part of the switch elastic dynamic sealing element and locking;
seventh, installing and overhauling a sealing gland and closing a pressure release member;
eighth, reversely starting the external driving device again, driving the lower hemispherical valve core to rotate around the rotating shaft in the reverse direction until the switch static seal is achieved, and at the moment, attaching the switch elastic moving seal piece to a sealing surface of the switch static seal on the valve body to form a cut-off seal structure;
a ninth step of detecting whether leakage exists or not by a pressure gauge in a state of maintaining the eighth step; if the leakage does not occur, restarting the external driving device to open the hemispherical valve core according to the actually required opening degree; if the leakage occurs, repeating the first step to the eighth step until the detection is qualified.
By adopting the technical scheme, the purpose of rapidly disassembling, assembling and overhauling the sealing pair under the normal working condition of the pipeline can be achieved. The three channels of the half ball valve are a fluid inlet channel, a fluid outlet channel and an online maintenance channel respectively; the fluid inlet channel, the fluid outlet channel and the online maintenance channel are respectively communicated with the valve cavity of the valve body; a switch sealing pair matched and sealed with the hemispherical valve core is arranged in the fluid outflow channel; an overhaul sealing pair matched and sealed with the hemispherical valve core is arranged in the online overhaul channel; an overhaul sealing gland is arranged on the outer end surface of the online overhaul channel; the pressure release component communicated with the online overhaul channel and the pressure gauge for detecting whether pressure exists in the overhaul channel in an overhaul state are arranged on the online overhaul channel, and the pressure is emptied through the pressure release component; therefore, maintenance operation can be carried out in the non-pressure state of the bypass channel under the condition that the normal operation of the main pipeline is not affected, the maintenance difficulty is reduced, and the safety is improved; in the cut-off working state, the sealing surfaces of the switch static seal and the switch dynamic seal of the switch sealing pair are attached to form a cut-off sealing structure; firstly, pressure relief is carried out through a pressure relief component; then opening the maintenance sealing gland, and exposing the switch dynamic seal of the switch sealing pair in the bypass channel; furthermore, maintenance personnel can realize online maintenance operation under normal operation of the pipeline; compared with the traditional hemispherical valve, the problem that the hemispherical valve in the market at present cannot realize on-line overhaul under the normal operation of the pipeline is solved, and the difficulty that other valves, such as a gate valve, a butterfly valve, a ball valve, a stop valve and the like cannot realize the overhaul under the normal operation of the pipeline is solved; therefore, the invention reduces the maintenance cost without affecting the normal transportation of the fluid medium, shortens the maintenance operation time, reduces the labor intensity and avoids the problem of productivity reduction caused by stopping the medium supply of the traditional valve.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, but any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present invention are within the scope of the technical solutions of the present invention.
Claims (10)
1. A three-way half ball valve based on pipeline normal operation on-line pressurized overhaul comprises a valve body and a hemispherical valve core; the method is characterized in that: three channels are arranged in the valve body, and are a fluid inlet channel, a fluid outlet channel and an online maintenance channel respectively; the fluid inlet channel, the fluid outlet channel and the online maintenance channel are respectively communicated with the valve cavity of the valve body; a switch sealing pair matched and sealed with the hemispherical valve core is arranged in the fluid outflow channel; the switch sealing pair comprises a switch static seal and a switch dynamic seal, the switch static seal is fixedly arranged in the fluid outflow channel, and the switch dynamic seal is arranged on the hemispherical valve core; the static seal of the switch in the fluid outflow channel is matched with the dynamic seal of the switch on the hemispherical valve core to form a switch seal pair; an overhaul sealing pair matched and sealed with the hemispherical valve core is arranged in the online overhaul channel; the overhaul sealing pair comprises an overhaul static seal and an overhaul dynamic seal; the overhauling static seal is arranged in the online overhauling channel, and the overhauling dynamic seal is arranged on the hemispherical valve core; the overhauling static seal in the online overhauling channel is matched with the overhauling dynamic seal on the hemispherical valve core to form an overhauling sealing pair; an overhaul sealing gland is arranged on the outer end surface of the online overhaul channel; the pressure relief component communicated with the online maintenance channel and the pressure gauge for detecting whether pressure exists in the maintenance channel in the maintenance state are arranged on the online maintenance channel; the hemispherical valve core is positioned in the valve cavity of the valve body, the hemispherical valve core is arranged on the valve body through a rotating shaft, and the rotating shaft is connected with an external driving device; in the cut-off working state, the sealing surfaces of the switch static seal and the switch dynamic seal of the switch sealing pair are attached to form a cut-off sealing structure; in the maintenance working state, the liquid in the online maintenance channel is emptied through the pressure relief component; the overhauling static seal of the overhauling sealing pair is attached to the sealing surface of the overhauling dynamic seal to form an overhauling sealing structure; and opening the maintenance sealing gland, and exposing the switch dynamic seal of the switch sealing pair in the online maintenance channel.
2. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 1, wherein: the switch static seal comprises an outlet valve body sealing seat; the outlet valve body sealing seat is detachably and fixedly arranged on the valve body through the sealing pressing seat; an outlet metal sealing surface which is in dynamic sealing fit with a switch on the hemispherical valve core is arranged on the outlet valve body sealing seat; a sealing ring is arranged between the sealing pressing seat, the outlet valve body sealing seat and the valve body; the switch dynamic seal comprises a spherical crown which is arranged on the hemispherical valve core through a fastener, and a switch elastic dynamic seal element is arranged between the spherical crown and the hemispherical valve core; and when the switch elastic dynamic sealing element is attached to the sealing surface of the outlet sphere of the outlet valve body sealing seat, a switch sealing pair is formed.
3. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 2, wherein: the sealing ring adopts a tyre type sealing ring and comprises a tyre type sealing body, wherein a pressurizing compensation opening is formed in the tyre type sealing body, and a pressurizing compensation opening mounting hole is formed in the valve body.
4. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 1, wherein: the overhaul static seal comprises an overhaul seal seat which is fixedly connected with the valve body, and an overhaul elastic static seal element is arranged at the valve cavity of the valve body at the lower end of the overhaul seal seat; an overhaul dynamic seal is arranged below the switch dynamic seal on the hemispherical valve core, and is an overhaul metal sealing surface integrated with the hemispherical valve core; when the ball body overhauling sealing surface on the half ball valve core is attached to the overhauling elastic static sealing element on the overhauling sealing seat, an overhauling sealing pair is formed.
5. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 4, wherein: the overhauling elastic static sealing element is a tyre type sealing element and comprises a tyre type sealing body, wherein a pressurizing compensation opening is formed in the tyre type sealing body, and an installing hole of the pressurizing compensation opening is formed in the outer end face of the overhauling sealing seat.
6. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 1, wherein: the overhaul static seal comprises an overhaul seal seat which is fixedly connected with the valve body, and an overhaul static metal sealing surface is arranged at the lower end of the overhaul seal seat; an overhaul dynamic seal is arranged below the switch dynamic seal on the hemispherical valve core, and comprises an overhaul elastic dynamic seal element which is arranged on the hemispherical valve core; and when the overhauling elastic dynamic sealing element is attached to an overhauling static sealing surface at the lower end of the overhauling sealing seat, an overhauling sealing pair is formed.
7. The three-way half ball valve for on-line pressurized overhaul based on normal operation of a pipeline according to claim 6, wherein: and the overhauling elastic dynamic sealing element is vulcanized on the hemispherical valve core.
8. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 1, wherein: at least two lifting rings are uniformly distributed on the upper end surface of the overhaul sealing gland; the two lifting rings and the connecting hole on the overhauling sealing pressure cover are positioned on the same circumference.
9. The three-way half ball valve for on-line pressurized overhaul based on normal operation of pipelines according to claim 1, wherein: and a skirt is arranged on the outer side of the valve body along the flowing direction of the fluid.
10. The pipeline pressure on-line maintenance method based on the three-way half ball valve is characterized by comprising the following steps of: the pipeline comprises a valve front pipeline and a valve rear pipeline, and a three-way half ball valve is arranged between the valve front pipeline and the valve rear pipeline, and the three-way half ball valve is adopted by the three-way half ball valve according to any one of the claims 1 to 9; when judging that the switching elastic dynamic sealing element of the three-way half ball valve is damaged, the switching elastic dynamic sealing element is overhauled under the condition that a pipeline is pressurized, and the specific overhauling method comprises the following steps of: the method comprises the steps that firstly, an external driving device is started, a lower hemispherical valve core is driven to rotate around a rotating shaft by the external driving device, at the moment, an overhaul moving seal of the hemispherical valve core is attached to an overhaul static seal in an online overhaul channel to form an overhaul sealing structure, and the overhaul sealing structure is in an overhaul working state at the moment; the second step, the pressure relief component is opened outside the valve body, the pressure of the on-line maintenance channel is emptied through the pressure relief component, and the pressure of the maintenance channel is zero after the pressure of the on-line maintenance channel is emptied; thirdly, a fastening bolt of the maintenance sealing cover is opened from the outside of the valve body, the maintenance sealing cover is removed, the whole online maintenance channel is exposed, and at the moment, the switch elastic dynamic sealing piece is exposed in the online maintenance channel; step four, sequentially disassembling the spherical crown and the switch elastic dynamic sealing element by using a disassembling tool, and removing the damaged switch elastic dynamic sealing element; fifthly, cleaning the mounting end face of the dynamic seal of the switch; a sixth step of replacing a new switch elastic dynamic sealing element, and installing a spherical cap gland on the upper part of the switch elastic dynamic sealing element and locking; seventh, installing and overhauling a sealing gland and closing a pressure release member; eighth, reversely starting the external driving device again, driving the lower hemispherical valve core to rotate around the rotating shaft in the reverse direction until the switch static seal is achieved, and at the moment, attaching the switch elastic moving seal piece to a sealing surface of the switch static seal on the valve body to form a cut-off seal structure; a ninth step of detecting whether leakage exists or not by a pressure gauge in a state of maintaining the eighth step; if the leakage does not occur, restarting the external driving device to open the hemispherical valve core according to the actually required opening degree; if the leakage occurs, repeating the first step to the eighth step until the detection is qualified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711036940.6A CN107883020B (en) | 2017-10-30 | 2017-10-30 | Three-way half ball valve for on-line pressurized overhaul based on normal operation of pipeline and overhaul method |
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| CN201711036940.6A CN107883020B (en) | 2017-10-30 | 2017-10-30 | Three-way half ball valve for on-line pressurized overhaul based on normal operation of pipeline and overhaul method |
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| CN108662201B (en) * | 2018-05-30 | 2019-07-09 | 周平平 | A kind of three-way ball valve |
| CN111609175B (en) * | 2020-06-22 | 2024-06-04 | 成都英派尔新能源科技有限公司 | Spherical sealing multi-way valve with pressure relief function |
| CN116181956B (en) * | 2023-02-14 | 2023-09-22 | 佛山市禅城能源有限公司 | Quick ball valve device of changing under pressure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137317A (en) * | 1997-07-16 | 1999-02-12 | Hideo Koo | Ball valve |
| CN2572156Y (en) * | 2002-07-04 | 2003-09-10 | 武汉大禹阀门制造有限公司 | Eccentric hard seal semiball valve |
| CN1629525A (en) * | 2004-04-12 | 2005-06-22 | 陈日 | Power-assisted two-way sealed track ball valve |
| CN102242813A (en) * | 2011-06-02 | 2011-11-16 | 浙江石化阀门有限公司 | Upper assembled ball valve |
| CN103090042A (en) * | 2013-02-03 | 2013-05-08 | 西麦克阀门制造有限公司 | Ball valve |
| CN103363144A (en) * | 2012-03-26 | 2013-10-23 | 胡侃 | Top entry full-bore eccentric half ball valve with no independent valve seat |
| CN203627882U (en) * | 2013-12-18 | 2014-06-04 | 雷蒙德（北京）阀门制造有限公司 | Up-mounted type ball valve with valve seat capable of being quickly dismounted and maintained online |
| CN207394026U (en) * | 2017-10-30 | 2018-05-22 | 天津塘沽瓦特斯阀门有限公司 | Three-way half ball valve based on the maintenance with pressure online of pipeline normal operation |
-
2017
- 2017-10-30 CN CN201711036940.6A patent/CN107883020B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137317A (en) * | 1997-07-16 | 1999-02-12 | Hideo Koo | Ball valve |
| CN2572156Y (en) * | 2002-07-04 | 2003-09-10 | 武汉大禹阀门制造有限公司 | Eccentric hard seal semiball valve |
| CN1629525A (en) * | 2004-04-12 | 2005-06-22 | 陈日 | Power-assisted two-way sealed track ball valve |
| CN102242813A (en) * | 2011-06-02 | 2011-11-16 | 浙江石化阀门有限公司 | Upper assembled ball valve |
| CN103363144A (en) * | 2012-03-26 | 2013-10-23 | 胡侃 | Top entry full-bore eccentric half ball valve with no independent valve seat |
| CN103090042A (en) * | 2013-02-03 | 2013-05-08 | 西麦克阀门制造有限公司 | Ball valve |
| CN203627882U (en) * | 2013-12-18 | 2014-06-04 | 雷蒙德（北京）阀门制造有限公司 | Up-mounted type ball valve with valve seat capable of being quickly dismounted and maintained online |
| CN207394026U (en) * | 2017-10-30 | 2018-05-22 | 天津塘沽瓦特斯阀门有限公司 | Three-way half ball valve based on the maintenance with pressure online of pipeline normal operation |
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