CN102384274A - Double-seal butterfly valve with maintenance sealing system - Google Patents
Double-seal butterfly valve with maintenance sealing system Download PDFInfo
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- CN102384274A CN102384274A CN2011103663597A CN201110366359A CN102384274A CN 102384274 A CN102384274 A CN 102384274A CN 2011103663597 A CN2011103663597 A CN 2011103663597A CN 201110366359 A CN201110366359 A CN 201110366359A CN 102384274 A CN102384274 A CN 102384274A
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Abstract
The invention provides a double-seal butterfly valve with a maintenance sealing system, which comprises a sealing butterfly valve, a water inlet control device and a position adjusting device, wherein the sealing butterfly valve comprises a maintenance sealing plate and a main sealing plate; the main sealing plate can operably turn off or turn on a valve body; the valve body further comprises a main sealing valve seat and a maintenance sealing valve seat that is capable of sliding along the inner wall of the main sealing valve seat; a cavity is formed on the inner wall of the main sealing valve seat; the maintenance sealing valve seat is arranged in the main sealing valve seat and used for closing the cavity and dividing the cavity into a first cavity and a second cavity; the water inlet control device injects water into the first cavity and the second cavity in a controllable way; the water pressure difference of the first cavity and the second cavity pushes the maintenance sealing valve seat to be close to or far from the maintenance sealing plate; the position adjusting device comprises a threaded pull rod of which one end is fixed on the maintenance sealing valve seat, a stop collar fixed on the threaded pull rod, and a nut rotatably connected with external threads of the threaded pull rod; and the side end of the nut butts against the stop collar.
Description
Technical field
The present invention relates to the mechanical seal field, especially, relate to a kind of double seals butterfly valve with the maintenance sealing system.
Background technique
In the construction of existing medium waterpower generator station; A pipe two-shipper or the pipe multimachine arrangements of adopting: promptly utilize a pressure tunnel or large diameter water inlet manifold more; Before upper reaches water storage is incorporated into the power plant building; Be further divided into two or many diversion arms, and a water inlet butterfly valve is installed on each diversion arm.A cover hydraulic generator unit is installed in the downstream side of each water inlet butterfly valve.
When water turbine generated electricity, the water inlet butterfly valve was opened, and upstream pressure water gets into water turbine through butterfly valve, promoted the water turbine generating.Yet; In the time need sealing maintenance to the water inlet butterfly valve on a certain diversion arm; Press water in necessary this water inlet manifold of emptying; Generator set under inactive this water inlet manifold on all diversion arms could overhaul this butterfly valve of intaking, and the generator set on the waste of build-up of pressure water and other diversion arms is involved by the loss of forced-stopping machine.
Summary of the invention
The object of the invention is to provide a kind of double seals butterfly valve with the maintenance sealing system, is involved by the technical problem of the loss of forced-stopping machine with the waste of build-up of pressure water and the generator set on other diversion arms in the solution existing technology.
For realizing above-mentioned purpose; According to an aspect of the present invention; A kind of double seals butterfly valve with the maintenance sealing system is provided; Comprise seal butterfly valve and inlet control device, seal butterfly valve comprises valve body, position regulator and is installed in the butterfly plate in the valve body rotationally that butterfly plate comprises that the maintenance sealing plate that is arranged side by side at interval is with the primary seal plate; The operationally closed valve body of perhaps opening of primary seal plate; Valve body also comprises primary seal valve seat and the maintenance seal valve seat that can slide along the inwall of primary seal valve seat; The inwall of primary seal valve seat is provided with a cavity: the maintenance seal valve seat is installed in the primary seal valve seat, and gets up cavity airtight, and cavity is separated to form one first chamber and one second chamber; First chamber is provided with one first water intake and one first water outlet; Second chamber is provided with one second water intake and a water outlet; Inlet control device is provided with first aqueduct that is connected with first water intake, and first aqueduct is water-filling in first chamber controllably; Inlet control device also is provided with second aqueduct that is connected with second water intake, and second aqueduct is water-filling in second chamber controllably; Wherein, the pressure difference that produces of the hydraulic pressure in first chamber and second chamber promote the maintenance seal valve seat near or away from the maintenance sealing plate; Position regulator comprises that an end is fixed on the thread of maintenance on the seal valve seat, the nut that is fixed on the stop collar on the thread and is connected rotationally with the outside thread of thread, the side of nut and stop collar push up each other to.
Further, stop collar is dismountable is fixed on the thread; Wherein, stop collar selectively is positioned at first side towards the maintenance seal valve seat of nut, perhaps is positioned at second side that nut overhauls seal valve seat dorsad.
Further, be connected with a coupling cock between first and second aqueduct; Be respectively equipped with the manually operated valve that makes first and second aqueduct open or close on first and second aqueduct.
Further, the double seals butterfly valve of band maintenance sealing system also comprises a water tank or a upstream line; The entrance point of first and second aqueduct is connected with water tank or upstream line; Also be provided with a hand increasing pressure pump at the entrance point place of first and second aqueduct.
Further, first water outlet is connected with first discharging valve; Second water outlet is connected with second discharging valve; The primary seal valve seat is provided with a through hole, and through hole is between maintenance sealing plate and primary seal plate, and through hole is connected with a drain valve.
Further, the primary seal valve seat is provided with a passage that connects with cavity, and butterfly plate is installed in rotation in the passage; The maintenance seal valve seat is slidably mounted in the passage, and the maintenance seal valve seat is provided with a maintenance seal ring towards the periphery of passage; The maintenance sealing plate periphery be provided with sealing rubber pad; The maintenance seal ring separates along with the maintenance seal valve seat pushes up to be against on the sealing rubber pad or with sealing rubber pad movably.
Further, the primary seal valve seat comprises first main body, second main body, retaining ring and coupling sleeve; Wherein, retaining ring is fixedly set in first end towards first main body of second main body; Coupling sleeve is fixedly set on the outer periphery of retaining ring, and coupling sleeve extends to the direction of first main body, and is fixedly connected on first end of first main body; Cavity is in passage, and cavity is formed by the end face of first end of first main body, the end face and common encirclement of coupling sleeve thereof of retaining ring; First water intake, first water outlet, second water intake and second water outlet all are located on the coupling sleeve, and all run through the barrel of coupling sleeve.
Further, the maintenance seal valve seat comprises and is sleeved in the passage slidably and the hydrodynamic reciprocating sealing tube and the dunnage of airtight cavity; Dunnage is formed along extending radially outwardly of hydrodynamic reciprocating sealing tube by the outer periphery of hydrodynamic reciprocating sealing tube; Wherein, dunnage is positioned at cavity, and the top be against on the internal face of coupling sleeve, cavity is divided into first chamber and second chamber.
Further, thread comprises fixing head and the thread rod part that is fixed on the dunnage, and wherein, thread rod part is fixed on a side of fixing head; Thread rod part is exposed at outside the valve body after the axial direction of passage passes retaining ring; The outer position of valve body that is exposed at of thread rod part is provided with scale; Stop collar and nut are installed in being exposed on the outer position of valve body of thread rod part.
The present invention has following beneficial effect: the double seals butterfly valve of band of the present invention maintenance sealing system utilizes hydraulic pressure and machinery type to unite driving, with realize the maintenance seal ring move reliably, put in place it is thus clear that and with overhaul the adjustable purpose of sealing plate sealing effect.In addition, the through hole between maintenance sealing plate and primary seal plate through valve body and be connected in the drain valve of through hole to keep watch on the leakage situation of maintenance seal ring, has improved the correctness and the validity of the sealing between maintenance seal ring and the maintenance sealing plate.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic representation that the band of the preferred embodiment of the present invention overhauls the double seals butterfly valve of sealing system, and the sealing system comprises double seals butterfly valve, but does not show the valve plate of double seals butterfly valve in this schematic representation;
Fig. 2 is the structural representation of double seals butterfly valve in the time of water inlet among Fig. 1 of the present invention;
Fig. 3 is the amputated structure schematic representation of the double seals butterfly valve of Fig. 2;
Fig. 4 is the amputated structure schematic representation of double seals butterfly valve in the time of maintenance among Fig. 1 of the present invention; And
Fig. 5 is the schematic representation of other mode of execution of double seals butterfly valve of the band maintenance sealing system of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Please referring to figs. 1 through Fig. 3, the double seals butterfly valve of the band of preferred embodiment of the present invention maintenance sealing system comprises seal butterfly valve 1 that is installed on diversion arm (not shown) and the inlet control device 2 that seal butterfly valve 1 is supplied water.
Valve body 10 comprises primary seal valve seat 11 and is installed in the maintenance seal valve seat 13 in the primary seal valve seat 11 movably.The middle part of primary seal valve seat 11 is provided with a passage 111 that lets current pass through, and butterfly plate 20 is installed in the passage 111.Primary seal valve seat 11 comprise the feed-water end that is positioned at passage 111 first main body 113, be positioned at second main body 115, retaining ring 117 and the coupling sleeve 119 of the waterexit end of passage 111.Leave the gap between first end of first end of first main body 113 and second main body 115.The inwall of second main body 115 is provided with working seal circle 118 near the second end place fixed convex.Second main body 115 is provided with a through hole 12 at working seal circle 118 places, and installation is provided with a drain valve 14 in this through hole 12.Retaining ring 117 be fixedly set in second main body 115 on the outer periphery of first end of first main body 113.Preferably, between the inner circumference edge of the outer periphery of second main body 115 and retaining ring 117, also be arranged with seal ring, to prevent the outer seepage of current direction in the passage 111.Coupling sleeve 119 is fixedly set on the outer periphery of retaining ring 117, and coupling sleeve 119 is fixedly connected on first end of first main body 113 away from an end of retaining ring 117, so that first main body 113 is tightly connected into an integral body with second main body 115.At this moment, first end of the end face of coupling sleeve 119, retaining ring 117 and first main body 113 surrounds a cavity 116 that connects each other with passage 111 jointly.Be provided with to the sidewall spacers of coupling sleeve 119 first water intake 112 that connects cavity 116, second water intake 114 and respectively with first water intake 112, first water outlet 15 and second water outlet 16 that second water intake 114 is relative.First water outlet 15 and second water outlet 16 are connected with first discharging valve 18 and second discharging valve 19 respectively.
Maintenance seal valve seat 13 comprises hydrodynamic reciprocating sealing tube 131 and the dunnage 133 that is sleeved on slidably in the passage 111.Wherein, dunnage is formed along extending radially outwardly of hydrodynamic reciprocating sealing tube 131 by the outer periphery of hydrodynamic reciprocating sealing tube 131.Hydrodynamic reciprocating sealing tube 131 tops are against the inner circumference edge of passage 111, and the opening of cavity 116 towards passage 111 sealed.Hydrodynamic reciprocating sealing tube 131 operationally slides along the inwall of passage 111.Preferably, between the inner circumference edge of the outer periphery of hydrodynamic reciprocating sealing tube 131 and passage 111, be provided with seal ring.The inner circumference edge of hydrodynamic reciprocating sealing tube 131 is convexly equipped with maintenance seal ring 135.Dunnage 133 stretches in the cavity 116; The outer periphery top of dunnage 133 is against on the inwall of coupling sleeve 119; And dunnage 133 is between first water intake 112 and second water intake 114; Cavity 116 being divided into first chamber 132 and second chamber 134, and first chamber 132 near first main body, 113, the second chambeies 134 near second main body 115.Wherein, first water intake 112 and first water outlet 15 and first chamber 132 connect; Second water intake 114 and second water outlet 16 and second chamber 134 connect.
The fixing head 311 of the thread 31 of position regulator 30 is fixed on the dunnage 133, so that maintenance seal valve seat 13 is along with thread 31 moves together.The thread rod part 312 of thread 31 axially passes retaining ring 117 along passage 111, and is exposed at outward outside the cavity 116, and stop collar 32 and nut 33 all are fixed on outer being exposed on the outer thread rod part 312 of cavity 116.The face that stop collar 32 selectively is positioned at nut 33 is towards first side of the dunnage 133 of maintenance seal valve seat 13, perhaps at second side of the dunnage of overhauling seal valve seat 13 dorsad 133 of nut 33.
Inlet control device 2 comprises water tank 21, first aqueduct 22 and second aqueduct 23.Wherein, the entrance point of first aqueduct 22 is connected in the water tank 21, and the outlet end of first aqueduct 22 is connected to first water intake 112; And on first aqueduct 22 manually operated valve 221 is installed.The entrance point of second aqueduct 23 is connected in the water tank 21, and the outlet end of second aqueduct 23 is connected to second water intake 114; And on second aqueduct 23 manually operated valve 231 is installed.Can control first aqueduct 22 and second aqueduct 23 respectively through operation manually operated valve 221,231 opens into water or closes and prevent into water.Also be connected with a coupling cock 27 between first aqueduct 22 and second aqueduct 23, the pressure in the win aqueduct 22 and second aqueduct 23 equated through opening coupling cock 27.
When generating, operate butterfly plate 20, make working seal circle 118 interlaced the opening of primary seal plate 203 and valve body 10.At this moment, seal butterfly valve 1 is opened, and upstream pressure water advanced passage 111 and flows into water turbine, promoted the water turbine generating.When water turbine need overhaul or need generation outage, operation butterfly plate 20 made the sealing rubber pad 292 on the primary seal plate 203 support sealing with the working seal circle 118 mutual tops of valve body 10.At this moment, seal butterfly valve 1 is closed, thereby sealing channel 111 flows into water turbine to stop upstream pressure water through passage 111.Need overhaul or need in the process of generation outage at above-mentioned generating, water turbine, inlet control device 2 is in shutoff device always, in first or second chamber 132,134, does not discharge water.
Please combine with reference to Fig. 4, when needs itself seal maintenance to seal butterfly valve 1, when promptly being the sealing condition between the working seal circle 118 of primary seal plate 203 and valve body 10 of maintenance seal butterfly valve 1, specific operation process and method are following:
The first step: operation butterfly plate 20 is closed seal butterfly valve 1.Coupling cock 27, manually operated valve 221 and 231 are all closed, in first or second chamber 132,134, discharge water to prevent inlet control device 2.Open second discharging valve 19 again, make the whole emptyings of ponding in second chamber 134.
Second step: after the ponding emptying in second chamber 134, close second discharging valve 19.At this moment, open manually operated valve 221, make inlet control device 2 in first chamber 132, carry high pressure water through first aqueduct 22.In the journey of water-filling in first chamber 132, because first chamber, 132 interior and second chamber, 134 internal pressure differences force the direction of maintenance seal valve seat 13 to second chamber 134 to move.At this moment, the maintenance seal valve seat 13 maintenance seal ring 135 along with the maintenance seal valve seat 13 to the maintenance sealing plate 201 near.
Preferably, in first chamber 132 or on first aqueduct 22 pressure gauge 25 is installed also, with the water pressure conditions of monitoring conveying to first chamber 132 in.More preferably, also be provided with a hand increasing pressure pump 26, and hand increasing pressure pump 26 links to each other with second aqueduct 23 with first aqueduct 22, so that increase the pressure in first chambeies 132 or second chamber 134 through first aqueduct 22 or second aqueduct 23.More preferably, between water tank 21 and hand increasing pressure pump 26, be provided with two filtrating equipments 28, to guarantee to get into the clean free from admixture of press water in first chamber 132 or second chamber 134.
In other embodiments, if in the journey of water-filling in first chamber 132, when maintenance seal valve seat 13 is not moved; Explain that promptly the hydraulic pressure in first chamber 132 is not enough, at this moment, open hand increasing pressure pump 26; With supercharging in first chamber 132, thereby force maintenance seal valve seat 13 to move.
In the whole process in second step, can judge the displacement distance of overhauling seal ring 135 through the scale of observing on the thread rod part 312.When the sealing rubber pad 291 of the maintenance seal ring 135 of observing maintenance seal valve seat 13 and maintenance sealing plate 201 soon each other against the time, close manually operated valve 221, make first aqueduct 22 stop conveying high pressure water to first chamber 132 in.
The 3rd step:, thereby make the maintenance seal ring 135 of maintenance seal valve seat 13 and the sealing rubber pad 291 of maintenance sealing plate 201 replace sealing through adjustment position regulator 30.
Detailed process is: the stop collar 32 with position regulator 30 is fixed on the thread rod part 312 earlier; Nut 33 with position regulator 30 is installed on the thread rod part 312 again, and makes nut 33 be positioned at the outside of stop collar 32.Afterwards, screw nut 33, thus force thread rod part 312 to the direction in second chamber 314 near.At this moment, the maintenance seal ring 135 of maintenance seal valve seat 13 along with maintenance seal valve seat 13 to maintenance sealing plate 201 near, replace sealing until the maintenance seal ring 135 and the sealing rubber pad 291 of maintenance sealing plate 201.In this process; Open the drain valve 14 of valve body 10; If still there are flowing out in the through hole 12 of valve body 10, then the maintenance seal ring 135 of explanation maintenance seal valve seat 13 does not have good seal with the sealing rubber pad 291 of maintenance sealing plate 201, need continue to screw nut 33.If there is not water to flow out in the through hole 12 of valve body 10, then the maintenance seal ring 135 of explanation maintenance seal valve seat 13 has been replaced good seal each other with the sealing rubber pad 291 of maintenance sealing plate 201.At this moment; The maintenance man then can get in the manhole (not shown) of seal butterfly valve 1 in the diversion arm, the sealing condition between the working seal circle 118 of the primary seal plate 203 of seal butterfly valve 1 and valve body 10 is overhauled or changes sealing rubber pad 292 on the primary seal plate 203 etc.Like this, without the press water in this water inlet manifold of emptying, the generator set under this water inlet manifold of also need not stopping using simultaneously on all diversion arms can be avoided the waste of press water and stop the loss that all generator set cause simultaneously.
After maintenance or changing completion, open first discharging valve 18, make the high pressure water emptying in first chamber 132.Open manually operated valve 231, in second chamber 134, charging into high pressure water, thereby force the direction of maintenance seal valve seat 13 to move to first chamber 132.At this moment, the maintenance seal ring 135 of maintenance seal valve seat 13 is along with overhauling seal valve seat 13 away from maintenance sealing plate 201.At last, be installed in the inboard of stop collar 32 after nut 33 pulled down again, screw nut 33 again, thus force thread rod part 312 to the direction in first chamber 312 near, retreat until maintenance seal ring 135 and to put in place.At this moment, opening connecting valve 27, and closeall other valve, promptly is to close drain valve 14, first discharging valve 18, second discharging valve 19, manually operated valve 221 and 231.In this process, can judge whether maintenance seal ring 135 is retreated and put in place through the scale on the thread rod part 312.
From the above: the double seals butterfly valve of band of the present invention maintenance sealing system can utilize hydraulic pressure and machinery type to unite driving, with realize maintenance seal ring 135 move reliably, put in place it is thus clear that and with overhaul the adjustable purpose of sealing plate 201 sealing effects.In addition; The through hole 12 between maintenance sealing plate 201 and primary seal plate 203 through valve body 10 and be connected in the drain valve 14 of through hole 12; To keep watch on the leakage situation of maintenance seal ring 13, improved the correctness and the validity of the sealing between maintenance seal ring 13 and the maintenance sealing plate 201.
Please with reference to Fig. 5, in other embodiments, the inlet control device 2 of the double seals butterfly valve of band maintenance sealing system of the present invention is except carrying the high pressure water in first chamber 132 or second chamber 134 through water tank 21, first aqueduct 22 and second aqueduct 23.Can also directly in upstream line 40, extract high pressure water.Between the import of upstream line 40 and first and second aqueduct 22,23, be provided with total inlet valve 41, chamber inlet valve 43 and twin filter 45 successively.Water tank 21 also can be connected in upstream line 40 through tank intake valve of water 47, so that in upstream line 40, in water tank 21, carry high pressure water.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
- One kind with the maintenance sealing system double seals butterfly valve; Comprise seal butterfly valve and inlet control device; Said seal butterfly valve comprises valve body, position regulator and is installed in the butterfly plate in the said valve body rotationally that said butterfly plate comprises that the maintenance sealing plate that is arranged side by side at interval is with the primary seal plate;Said primary seal plate operationally closure is perhaps opened said valve body;It is characterized in that,Said valve body also comprises primary seal valve seat and the maintenance seal valve seat that can slide along the inwall of said primary seal valve seat;The inwall of said primary seal valve seat is provided with a cavity:Said maintenance seal valve seat is installed in the said primary seal valve seat, and gets up said cavity airtight, and said cavity is separated to form one first chamber and one second chamber;Said first chamber is provided with one first water intake and one first water outlet; Said second chamber is provided with one second water intake and one second water outlet;Said inlet control device is provided with first aqueduct that is connected with said first water intake, and said first aqueduct is water-filling in said first chamber controllably;Said inlet control device also is provided with second aqueduct that is connected with said second water intake, and said second aqueduct is water-filling in said second chamber controllably; Wherein, the pressure difference that produces of the hydraulic pressure in said first chamber and said second chamber promote said maintenance seal valve seat near or away from said maintenance sealing plate;Said position regulator comprises the nut that an end is fixed on thread on the said maintenance seal valve seat, is fixed on the stop collar on the said thread and is connected rotationally with the outside thread of said thread, the side of said nut and said stop collar push up each other to.
- 2. the double seals butterfly valve of band maintenance sealing system according to claim 1 is characterized in that said stop collar is dismountable to be fixed on the said thread;Wherein, said stop collar selectively is positioned at first side towards said maintenance seal valve seat of said nut, perhaps is positioned at second side of the said dorsad maintenance seal valve seat of said nut.
- 3. the double seals butterfly valve of band maintenance sealing system according to claim 2 is characterized in that, is connected with a coupling cock between said first and second aqueduct;Be respectively equipped with the manually operated valve that makes said first and second aqueduct open or close on said first and second aqueduct.
- 4. the double seals butterfly valve of band maintenance sealing system according to claim 3 is characterized in that, the double seals butterfly valve of said band maintenance sealing system also comprises a water tank or a upstream line;The entrance point of said first and second aqueduct is connected with said water tank or said upstream line;Also be provided with a hand increasing pressure pump at the entrance point place of said first and second aqueduct.
- 5. the double seals butterfly valve of band maintenance sealing system according to claim 3 is characterized in that said first water outlet is connected with first discharging valve;Said second water outlet is connected with second discharging valve;Said primary seal valve seat is provided with a through hole, and said through hole is between said maintenance sealing plate and said primary seal plate, and said through hole is connected with a drain valve.
- 6. the double seals butterfly valve of band maintenance sealing system according to claim 5 is characterized in that said primary seal valve seat is provided with a passage that connects with said cavity, and said butterfly plate is installed in rotation in the said passage;Said maintenance seal valve seat is slidably mounted in the said passage, and said maintenance seal valve seat is provided with a maintenance seal ring towards the periphery of said passage;Said maintenance sealing plate periphery be provided with sealing rubber pad;Said maintenance seal ring is against on the said sealing rubber pad or with said sealing rubber pad along with said maintenance seal valve seat pushes up movably and separates.
- 7. the double seals butterfly valve of band maintenance sealing system according to claim 6 is characterized in that said primary seal valve seat comprises first main body, second main body, retaining ring and coupling sleeve;Wherein, said retaining ring is fixedly set in first end towards said first main body of said second main body; Said coupling sleeve is fixedly set on the outer periphery of said retaining ring, and said coupling sleeve extends to the direction of said first main body, and is fixedly connected on first end of said first main body;Said cavity is in said passage, and said cavity is formed by the end face of the end face of first end of said first main body, said retaining ring and common encirclement of said coupling sleeve thereof;Said first water intake, said first water outlet, said second water intake and said second water outlet all are located on the said coupling sleeve, and all run through the barrel of said coupling sleeve.
- 8. the double seals butterfly valve of band according to claim 7 maintenance sealing system is characterized in that, said maintenance seal valve seat comprises and is sleeved in the said passage slidably and the hydrodynamic reciprocating sealing tube and the dunnage of airtight said cavity;Said dunnage is formed along extending radially outwardly of said hydrodynamic reciprocating sealing tube by the outer periphery of said hydrodynamic reciprocating sealing tube;Wherein, said dunnage is positioned at said cavity, and the top be against on the internal face of said coupling sleeve, said cavity is divided into said first chamber and said second chamber.
- 9. the double seals butterfly valve of band maintenance sealing system according to claim 8 is characterized in that said thread comprises fixing head and the thread rod part that is fixed on the said dunnage, and wherein, said thread rod part is fixed on a side of said solid head;Said thread rod part is exposed at outside the said valve body after the axial direction of said passage passes said retaining ring;The outer position of said valve body that is exposed at of said thread rod part is provided with scale;Said stop collar and said nut are installed on the outer position of the said valve body of being exposed at of said thread rod part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110366359.7A CN102384274B (en) | 2011-11-17 | 2011-11-17 | Double-seal butterfly valve with maintenance sealing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110366359.7A CN102384274B (en) | 2011-11-17 | 2011-11-17 | Double-seal butterfly valve with maintenance sealing system |
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| CN102384274A true CN102384274A (en) | 2012-03-21 |
| CN102384274B CN102384274B (en) | 2014-04-09 |
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| CN201110366359.7A Active CN102384274B (en) | 2011-11-17 | 2011-11-17 | Double-seal butterfly valve with maintenance sealing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103453155A (en) * | 2013-08-30 | 2013-12-18 | 中阀科技(长沙)阀门有限公司 | Full-manual dual-seal butterfly valve of movable sealing device independent of valve body |
| CN103603994A (en) * | 2013-11-29 | 2014-02-26 | 天津祥嘉流体控制系统有限公司 | Double-eccentric ultralow temperature butterfly valve |
| CN104864106A (en) * | 2015-05-26 | 2015-08-26 | 柳州钢铁股份有限公司 | Metal hard sealing butterfly valve with moving valve seat |
| CN106763821A (en) * | 2017-02-23 | 2017-05-31 | 中国海洋石油总公司 | A kind of weather tight butterfly valve |
| CN112303245A (en) * | 2019-07-29 | 2021-02-02 | 浙江三花制冷集团有限公司 | Flow control valve |
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|---|---|---|---|---|
| CN103453155A (en) * | 2013-08-30 | 2013-12-18 | 中阀科技(长沙)阀门有限公司 | Full-manual dual-seal butterfly valve of movable sealing device independent of valve body |
| CN103453155B (en) * | 2013-08-30 | 2016-09-14 | 中阀科技(长沙)阀门有限公司 | Moving sealing device is independent of the complete manual double seals butterfly valve of valve body |
| CN103603994A (en) * | 2013-11-29 | 2014-02-26 | 天津祥嘉流体控制系统有限公司 | Double-eccentric ultralow temperature butterfly valve |
| CN103603994B (en) * | 2013-11-29 | 2016-06-29 | 天津祥嘉流体控制系统有限公司 | A kind of double-eccentric ultralow temperature butterfly valve |
| CN104864106A (en) * | 2015-05-26 | 2015-08-26 | 柳州钢铁股份有限公司 | Metal hard sealing butterfly valve with moving valve seat |
| CN106763821A (en) * | 2017-02-23 | 2017-05-31 | 中国海洋石油总公司 | A kind of weather tight butterfly valve |
| CN112303245A (en) * | 2019-07-29 | 2021-02-02 | 浙江三花制冷集团有限公司 | Flow control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102384274B (en) | 2014-04-09 |
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