CN114198546A - Double-hemisphere explosion-proof ball valve - Google Patents
Double-hemisphere explosion-proof ball valve Download PDFInfo
- Publication number
- CN114198546A CN114198546A CN202111636503.4A CN202111636503A CN114198546A CN 114198546 A CN114198546 A CN 114198546A CN 202111636503 A CN202111636503 A CN 202111636503A CN 114198546 A CN114198546 A CN 114198546A
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- Prior art keywords
- valve
- hemisphere
- piston
- switching sleeve
- cylinder body
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a double-hemisphere explosion-proof ball valve, which comprises a valve body, a valve cover and a valve rod, and is characterized in that: the middle cavity is internally and rotatably provided with a left hemisphere and a right hemisphere, the left hemisphere is in sealing fit with a left valve seat, the right hemisphere is in sealing fit with a right valve seat, the upper end of the valve cover is provided with a cylinder body, an upper piston cavity and a lower piston cavity are arranged in the cylinder body, an upper piston can be arranged in the upper piston cavity in a lifting mode, the upper piston is provided with an upper spring in a lifting mode, a lower piston is arranged in the lower piston cavity in a lifting mode, the lower piston is provided with a lower spring in a lifting mode, a valve rod penetrates through the cylinder body, an inner switching sleeve and an outer switching sleeve are sleeved on the valve rod, the upper end of the inner switching sleeve is connected with the upper piston, the lower end of the inner switching sleeve is in circumferential linkage and axial sliding fit with the upper end of the left hemisphere, the upper end of the outer switching sleeve is connected with the lower piston, the lower end of the outer switching sleeve is in circumferential linkage and axial sliding fit with the upper end of the right hemisphere, and medium pressure abnormality in the middle cavity can drive the left hemisphere or the outer switching sleeve to drive the right hemisphere to open and release pressure. The invention is safe and reliable and has large discharge capacity.
Description
Technical Field
The invention relates to an improved ball valve, in particular to an improved double-hemisphere anti-explosion ball valve.
Background
The ball valve is by extensive application in petroleum refining, long distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, trades such as steel, traditional ball valve is when closing, the medium can be remained to the lumen part, especially liquid medium, when externally being heated, easy inflation, thereby arouse the lumen to step up, when pressure is too high, arouse the valve explosion easily, traditional explosion-proof method is a relief valve of installation at the lumen position, when lumen pressure exceeded the setting value, the relief valve opened, the lumen medium passes through the relief valve and externally discharges, its shortcoming lies in: if the medium is toxic or corrosive, the discharge to the outside through the pressure relief valve is liable to cause a great accident.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides a safe and reliable double-hemisphere explosion-proof ball valve.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this kind of explosion-proof ball valve of two hemispheres, including valve body, valve gap and valve rod, be equipped with import chamber, lumen and the export chamber that communicates in proper order in the valve body, be equipped with left disk seat and right disk seat in this lumen, the valve gap lid is located the valve body and is gone up the port, and the valve rod is rotatable to be worn to locate on the valve gap, and the valve rod upper end is connected with drive arrangement, its characterized in that: the middle cavity is also rotatably provided with a left hemisphere and a right hemisphere, the left hemisphere is in sealing fit with a left valve seat, the right hemisphere is in sealing fit with a right valve seat, the upper end of the valve cover is provided with a cylinder body, an upper piston cavity and a lower piston cavity are arranged in the cylinder body, an upper piston is arranged in the upper piston cavity in a lifting manner, the upper piston is provided with an upper spring in a matching manner, a lower piston is arranged in the lower piston cavity in a lifting manner, the lower piston is provided with a lower spring in a lower piston, the valve rod penetrates through the cylinder body, the upper piston and the lower piston and is sleeved with an inner switching sleeve and an outer switching sleeve, the inner circle of the inner switching sleeve is provided with an inner guide block, the outer circle of the inner switching sleeve is provided with an inner vertical groove matched with the inner vertical groove, the upper end of the outer vertical groove is connected with an outer upper vertical groove, the lower end of the outer vertical groove is connected with an outer lower vertical groove, the upper end of the inner switching sleeve is connected with the upper piston, the lower end of the inner switching sleeve is in circumferential linkage and axial sliding fit with the upper end head of the left hemisphere, the upper end of the outer switching sleeve is connected with the lower piston, and the lower end of the outer switching sleeve is in circumferential linkage and axial sliding fit with the upper end head of the right hemisphere; the valve body front side is equipped with violently the pipe, and the left connecting hole and the export chamber of violently managing are linked together, and the right connecting hole and the import chamber of violently managing are linked together, violently manage and pass through left pipe intercommunication with lower piston chamber upper portion, violently manage and pass through right pipe intercommunication with upper piston chamber upper portion, violently manage and pass through with the lumen and get the pressure hole intercommunication, violently be equipped with the conversion stopper that axial seal removed in the pipe, the conversion stopper can select to switch on and get pressure hole and left pipe or get pressure hole and right pipe.
The cylinder body comprises an upper cylinder body and a lower cylinder body which are connected, a partition plate is arranged between the upper cylinder body and the lower cylinder body, an upper piston cavity is formed above the partition plate, and a lower piston cavity is formed below the partition plate.
The driving device is a turbine transmission device, a hydraulic transmission device or a pneumatic transmission device.
The outer circle of the middle part of the conversion plug is provided with an annular groove, a gap is formed between the annular groove and the inner circle of the transverse pipe, and the gap can selectively conduct the pressure taking hole and the left pipe or the pressure taking hole and the right pipe along with the axial movement of the conversion plug.
The improved double-hemisphere explosion-proof ball valve has the advantages that the improved double-hemisphere explosion-proof ball valve does not need to be provided with the pressure release valve in the middle cavity part, the structure can ensure that when the medium pressure of the middle cavity of the valve is overhigh, the medium of the middle cavity is discharged into the pipeline by utilizing the medium of the valve and the switching structure to drive the left hemisphere or the right hemisphere to be opened, and the advantages of high safety, high reliability and low cost are achieved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the closed state of the present invention.
Fig. 2 is a cross-sectional view D-D of fig. 1 of the present invention.
Fig. 3 is a cross-sectional view E-E of fig. 2 of the present invention.
Fig. 4 is a schematic view of the lower portion of the valve stem of the present invention.
Fig. 5 is a lower schematic view of an inner shift sleeve of the present invention.
Detailed Description
The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. In this embodiment, the double-hemisphere explosion-proof ball valve includes a valve body, a valve cover 11 and a valve rod 24, the valve body is formed by assembling a left valve body 1 and a right valve body 37, an inlet chamber 2, a middle chamber 5 and an outlet chamber 33 are arranged in the valve body, the middle chamber 5 is internally provided with a left valve seat 3 and a right valve seat 32, the valve cover 11 is covered on an upper port of the valve body, the valve rod 24 is rotatably disposed on the valve cover 11, the upper end of the valve rod 24 is connected with a driving device 22, the middle chamber 5 is also rotatably provided with a left hemisphere 4 and a right hemisphere 36, the lower ends of the left hemisphere 4 and the right hemisphere 36 are specifically mounted on a lower valve rod 38, the lower valve rod 38 is rotatably disposed at the lower end of the valve body, the corresponding lower end of the valve body is provided with a lower end cover 39, the left hemisphere 4 is in sealing fit with the left valve seat 3, the right hemisphere 36 is in sealing fit with the right valve seat 32, the upper end of the valve cover 11 is provided with a cylinder body, an upper piston chamber 19 and a lower piston chamber 15 are arranged in the cylinder body, an upper piston 18 is arranged in the upper piston cavity 19 in a lifting manner, an upper breathing hole 25 is arranged on the corresponding upper piston cavity 19, the upper piston 18 is provided with an upper spring 17, the upper spring 17 is positioned below the upper piston 18 to play a resetting role, a lower piston 14 is arranged in the lower piston cavity 15 in a lifting manner, a lower breathing hole 28 is arranged on the corresponding lower piston cavity 15, the lower piston 14 is provided with a lower spring 27, the lower spring 27 is positioned below the lower piston 14 to play a resetting role, the valve rod 24 penetrates through the cylinder body, the upper piston 18 and the lower piston 14, a sealing structure such as a packing 23 is arranged between the valve rod 24 and the upper end of the cylinder body, an inner switching sleeve 7 and an outer switching sleeve 29 are sleeved on the valve rod 24, an inner guide block 13 is arranged on the inner circle of the inner switching sleeve 7, an inner vertical groove 12 matched with the outer circle of the corresponding valve rod 24 is arranged on the outer circle, the lower end of the inner vertical groove 12 is connected with an inner lower spiral groove 48, an outer guide block 31 is arranged on the inner circle of the outer switching sleeve 29, an outer vertical groove 30 matched with the outer vertical groove is formed in the outer circle of the corresponding inner switching sleeve 7, the upper end of the outer vertical groove 30 is connected with an outer upper spiral groove 49, the lower end of the outer vertical groove 30 is connected with an outer lower spiral groove 50, the upper end of the inner switching sleeve 7 is connected with the upper piston 18, the lower end of the inner switching sleeve 7 is in circumferential linkage and axial sliding fit with the upper end of the left hemisphere 4, specifically, the inner switching sleeve is in transmission fit with the upper key groove 9 through an upper key 10, the upper end of the outer switching sleeve 29 is connected with the lower piston 14, the lower end of the outer switching sleeve 29 is in circumferential linkage and axial sliding fit with the upper end of the right hemisphere 36, and specifically, the lower key 34 is in transmission fit with the lower key groove 35; the front side of the valve body is provided with a transverse pipe 44, a left connecting hole 46 of the transverse pipe 44 is communicated with the outlet cavity 33, a right connecting hole 47 of the transverse pipe 44 is communicated with the inlet cavity 2, the transverse pipe 44 is communicated with the upper part of the lower piston cavity 15 through a left pipe 41 to guide a medium to drive the lower piston 14 to move downwards, the transverse pipe 44 is communicated with the upper part of the upper piston cavity 19 through a right pipe 40 to guide the medium to drive the upper piston 18 to move downwards, the transverse pipe 44 is communicated with the middle cavity 5 through a pressure taking hole 45 to guide the medium of the middle cavity 5 to enter the transverse pipe 44, a conversion plug 43 capable of axially moving in a sealing mode is arranged in the transverse pipe 44, the conversion plug 43 limits the movement in the transverse pipe 44, and the conversion plug 43 can selectively conduct the pressure taking hole 45 and the left pipe 41 or the pressure taking hole 45 and the right pipe 40.
As a further improved embodiment, the cylinder comprises an upper cylinder 20 and a lower cylinder 26 which are connected, a partition 16 is arranged between the upper cylinder 20 and the lower cylinder 26, an upper piston cavity 19 is formed above the partition 16, and a lower piston cavity 15 is formed below the partition 16.
As a further improved embodiment, the driving device 22 is a turbine transmission device, a hydraulic transmission device or a pneumatic transmission device, and is mounted on the cylinder body through the bracket 21.
In a further improved embodiment, an annular groove is formed on the outer circle of the middle part of the switching plug 43, a gap 42 is formed between the annular groove and the inner circle of the transverse tube 44, and the gap 42 can selectively conduct the pressure taking hole 45 and the left tube 41 or the pressure taking hole 45 and the right tube 40 along with the axial movement of the switching plug 43.
The working principle of the invention is as follows:
and (3) switching process: the valve rod 24 is driven to rotate by the driving device 22, and due to the action of the inner guide block 31 and the outer guide block 31, the valve rod 24 drives the inner change sleeve 7 and the outer change sleeve 29 to simultaneously rotate, the inner change sleeve 7 is in key type connection with the upper end head 6 of the left hemisphere 4, the outer change sleeve 29 is in key type connection with the upper end head 8 of the right hemisphere 36, and therefore the left hemisphere 4 and the right hemisphere 36 can be driven to rotate at the same time, and the ball valve is opened or closed.
When the valve is in a closed state, if the medium pressure in the inlet cavity 2 is greater than the medium pressure in the outlet cavity 33, the medium in the inlet cavity 2 enters the transverse pipe 44 through the right connecting hole 47 to drive the conversion plug 43 to move left, the middle cavity 5, the pressure taking hole 45, the gap 42 and the left pipe 41 are communicated with the lower piston cavity 15, if the medium in the middle cavity 5 abnormally increases pressure and exceeds a preset value, the medium in the middle cavity 5 enters the lower piston cavity 15 to drive the lower piston 14 to move downwards, the outer guide block 31 moves downwards along the outer vertical groove 30, and when the medium enters the outer lower spiral groove 50, the outer conversion sleeve 29 rotates and moves downwards to drive the right hemisphere 36 to rotate, the right hemisphere 36 is opened, and the medium in the middle cavity 5 is discharged to the outlet cavity 33;
if the medium pressure in the inlet cavity 2 is lower than the medium pressure in the outlet cavity 33, the medium in the outlet cavity 33 enters the transverse pipe 44 through the left connecting hole 46 to drive the conversion plug 43 to move rightwards, the middle cavity 5, the pressure taking hole 45, the gap 42 and the right pipe 40 are communicated with the upper piston cavity 19, if the medium in the middle cavity 5 abnormally rises and exceeds a preset value, the medium in the middle cavity 5 enters the upper piston cavity 19 to drive the upper piston 18 to move downwards, the inner guide block 13 moves downwards along the inner vertical groove 12 to enter the inner lower spiral groove 48 (at the moment, the outer guide block 31 enters the outer upper spiral groove 49), the inner switching sleeve 7 rotates and moves downwards to drive the left hemisphere 4 to rotate, the left hemisphere 4 is opened, and the medium in the middle cavity 5 is discharged to the inlet cavity 2 (because the inner lower spiral groove 48 and the outer upper spiral groove 49 have the same direction and the same thread pitch, the outer switching sleeve 29 cannot move together with the inner switching sleeve 7 when the inner switching sleeve 7 rotates and moves downwards).
In order to prevent the inner switching sleeve 7 from driving the outer switching sleeve 29 to rotate when rotating or the outer switching sleeve 29 from driving the inner switching sleeve 7 to rotate when rotating, the outer surface of the inner switching sleeve 7 and the inner surface of the outer switching sleeve 29 can be processed into very smooth surfaces, and the friction force can be reduced. Meanwhile, the inner guide block and the outer guide block can be arranged to be of a cylindrical structure, so that contact surfaces of the inner guide block and the outer guide block with the inner vertical groove and the outer vertical groove and the side surfaces of the spiral groove are reduced, and friction is reduced.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an explosion-proof ball valve of two hemispheres, including valve body, valve gap and valve rod, be equipped with import chamber, lumen and the export chamber that communicates in proper order in the valve body, be equipped with left disk seat and right disk seat in this lumen, the valve gap lid is located the valve body and is gone up the port, and the valve rod is rotatable to be worn to locate on the valve gap, and the valve rod upper end is connected with drive arrangement, its characterized in that: the middle cavity is also rotatably provided with a left hemisphere and a right hemisphere, the left hemisphere is in sealing fit with a left valve seat, the right hemisphere is in sealing fit with a right valve seat, the upper end of the valve cover is provided with a cylinder body, an upper piston cavity and a lower piston cavity are arranged in the cylinder body, an upper piston is arranged in the upper piston cavity in a lifting manner, the upper piston is provided with an upper spring in a matching manner, a lower piston is arranged in the lower piston cavity in a lifting manner, the lower piston is provided with a lower spring in a lower piston, the valve rod penetrates through the cylinder body, the upper piston and the lower piston and is sleeved with an inner switching sleeve and an outer switching sleeve, the inner circle of the inner switching sleeve is provided with an inner guide block, the outer circle of the inner switching sleeve is provided with an inner vertical groove matched with the inner vertical groove, the upper end of the outer vertical groove is connected with an outer upper vertical groove, the lower end of the outer vertical groove is connected with an outer lower vertical groove, the upper end of the inner switching sleeve is connected with the upper piston, the lower end of the inner switching sleeve is in circumferential linkage and axial sliding fit with the upper end head of the left hemisphere, the upper end of the outer switching sleeve is connected with the lower piston, and the lower end of the outer switching sleeve is in circumferential linkage and axial sliding fit with the upper end head of the right hemisphere; the valve body front side is equipped with violently the pipe, and the left connecting hole and the export chamber of violently managing are linked together, and the right connecting hole and the import chamber of violently managing are linked together, violently manage and pass through left pipe intercommunication with lower piston chamber upper portion, violently manage and pass through right pipe intercommunication with upper piston chamber upper portion, violently manage and pass through with the lumen and get the pressure hole intercommunication, violently be equipped with the conversion stopper that axial seal removed in the pipe, the conversion stopper can select to switch on and get pressure hole and left pipe or get pressure hole and right pipe.
2. The dual hemisphere explosion-proof ball valve of claim 1, wherein: the cylinder body comprises an upper cylinder body and a lower cylinder body which are connected, a partition plate is arranged between the upper cylinder body and the lower cylinder body, an upper piston cavity is formed above the partition plate, and a lower piston cavity is formed below the partition plate.
3. The dual hemisphere explosion-proof ball valve of claim 1, wherein: the driving device is a turbine transmission device, a hydraulic transmission device or a pneumatic transmission device.
4. The dual hemisphere explosion-proof ball valve of claim 1, wherein: the outer circle of the middle part of the conversion plug is provided with an annular groove, a gap is formed between the annular groove and the inner circle of the transverse pipe, and the gap can selectively conduct the pressure taking hole and the left pipe or the pressure taking hole and the right pipe along with the axial movement of the conversion plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111636503.4A CN114198546A (en) | 2021-12-29 | 2021-12-29 | Double-hemisphere explosion-proof ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111636503.4A CN114198546A (en) | 2021-12-29 | 2021-12-29 | Double-hemisphere explosion-proof ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114198546A true CN114198546A (en) | 2022-03-18 |
Family
ID=80657155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111636503.4A Withdrawn CN114198546A (en) | 2021-12-29 | 2021-12-29 | Double-hemisphere explosion-proof ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114198546A (en) |
-
2021
- 2021-12-29 CN CN202111636503.4A patent/CN114198546A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220318 |
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| WW01 | Invention patent application withdrawn after publication |