CN109826965B - Butterfly valve and online quick-change type assembling method for valve plate of butterfly valve - Google Patents
Butterfly valve and online quick-change type assembling method for valve plate of butterfly valve Download PDFInfo
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- CN109826965B CN109826965B CN201910218042.5A CN201910218042A CN109826965B CN 109826965 B CN109826965 B CN 109826965B CN 201910218042 A CN201910218042 A CN 201910218042A CN 109826965 B CN109826965 B CN 109826965B
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Abstract
The invention relates to the technical field of valves, in particular to a butterfly valve and an online quick-change type assembling method for a valve plate of the butterfly valve. The butterfly valve comprises a valve body and a valve plate assembly, wherein a medium inlet and a medium outlet are respectively formed in two opposite sides of the valve body, an overhauling window is formed in the top of the valve body, a lower valve cover is installed at the bottom of the valve body, the valve plate assembly is installed in the valve body through the overhauling window, the lower end of the valve plate assembly abuts against the lower valve cover, an upper valve cover is connected with the upper end of the valve plate assembly, and the valve plate assembly is pressed to limit the valve plate assembly to move up and down in the valve body. The assembling method comprises the following steps of preparing all parts of a valve to be assembled and cleaning the parts; assembling a new valve plate assembly; disassembling the old valve plate assembly; and (4) loading a new valve plate assembly into the valve body from the top of the valve body. The invention has the beneficial effects that: the valve plate assembly is convenient to modularize and quickly assemble, and the assembling quality and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a butterfly valve and an online quick-change type assembling method for a valve plate of the butterfly valve.
Background
With the development of petroleum and natural gas industries in China, natural gas is more and more favored as clean energy. The demand of natural gas to the low temperature butterfly valve is very huge in liquefaction, storage, transportation process, simultaneously because the medium has the flammability, has proposed higher requirement to the low temperature butterfly valve, needs the valve possess sealing performance good, leak low, long service life simultaneously, and the valve can realize online maintenance fast. During online maintenance, the sealing ring needs to be quickly positioned, internal parts such as a valve plate and the like need to be quickly replaced, one-time assembly is qualified, operation is very difficult, especially in the working condition application of ultralow temperature (lower than-196 ℃), the butterfly valve is more difficult to maintain and replace online, and the assembly and maintenance efficiency is low.
At present, in the traditional three-eccentric low-temperature butterfly valve assembly, lines at opposite positions are marked on a sealing ring and a valve seat of a valve body, and the three-eccentric mounting positions are recorded. During assembly, a valve rod is installed, a valve plate is installed in place from the side face of a valve body, then the valve plate is adjusted to the center of the valve body, after the upper and lower gaps of the valve plate and the valve body are approximately the same, a sealing ring is installed, the circumferential position of the sealing ring is adjusted repeatedly, the drawn sealing ring is consistent with the groove of the position of a valve seat, then the valve plate is opened and closed for a plurality of times, the sealing surface of the sealing ring is in place in a fit mode with the sealing surface of the valve body, then a valve plate bolt is screwed, the positions of the four sides of the valve rod and the end. Because the traditional three-eccentric butterfly valve assembly process needs to firstly scribe on the sealing ring and the valve seat, the valve plate and the valve rod are firstly installed during assembly, and an operator can only assemble related internal parts such as the valve plate, the sealing ring and the like from the side surface of the valve body, especially during large-caliber assembly, the valve body must be laid down and aligned for many times, and the operation is difficult; the relative position of the sealing pair must be debugged repeatedly by an operator during assembling the sealing ring, the time spent is long, the operator is required to have certain experience and technical performance, otherwise, the sealing performance of the assembled valve is poor, and the one-time assembling qualified rate is low. The traditional three-eccentric low-temperature butterfly valve assembling process is difficult to assemble under the line, and has no operability even if the assembly process is maintained on the line.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a butterfly valve and a method for assembling a valve plate of a butterfly valve in an online quick-change manner, which are used to solve the problems of the prior art, such as difficulty in online assembling the valve plate of the butterfly valve, and low assembling efficiency.
In order to achieve the above and other related objects, the present invention provides a butterfly valve, including a valve body and a valve plate assembly, wherein two opposite sides of the valve body are respectively provided with a medium inlet and a medium outlet, the top of the valve body is provided with an inspection window, the bottom of the valve body is provided with a lower valve cover, the valve plate assembly is arranged in the valve body from the inspection window, the lower end of the valve plate assembly props against the lower valve cover, the upper valve cover is connected with the upper end of the valve plate assembly, and the valve plate assembly is pressed to limit the valve plate assembly to move up and down in the valve body;
the valve plate assembly comprises a valve plate and a valve rod, the valve rod penetrates through the valve plate and is locked with the valve plate through a cylindrical pin, a sealing ring is sleeved on a step portion of the valve plate and is compressed by a pressing ring, a semi-arc groove is concavely arranged on the inner side wall of the sealing ring and the outer side wall of the step portion, the two semi-arc grooves are aligned to form a positioning cavity, and a positioning pin for positioning the sealing ring is installed in the positioning cavity.
The butterfly valve has the beneficial effects that: simple structure makes sealing washer and valve plate can the rapid Assembly target in place through the locating pin, and the assembly of being convenient for has improved assembly efficiency.
An on-line quick-change assembling method for a valve plate of a butterfly valve comprises the following steps,
preparing all parts of a valve to be assembled, and cleaning the parts;
assembling a new valve plate assembly;
disassembling the old valve plate assembly;
and (4) loading a new valve plate assembly into the valve body from the top of the valve body.
The assembly method has the beneficial effects that: the valve plate assembly is assembled well firstly, the modularized assembly is realized, and the valve plate assembly is assembled by the upper assembling type assembly method of the valve body from the top of the valve body, so that the valve body is prevented from being repeatedly laid down and erected, the operation process is simplified, the operation difficulty is reduced, and the assembly quality and efficiency are improved.
Optionally, when cleaning each part of the valve to be assembled, cleaning all parts by using an inorganic non-combustible cleaning agent, then performing oil-prohibiting and degreasing treatment, and checking whether the treatment is qualified.
Optionally, the inorganic non-flammable cleaning agent is acetone or alcohol.
Optionally, when checking whether the oil-forbidden and degreasing treatment is qualified, the parts are irradiated by an ultraviolet lamp.
Optionally, when assembling a new valve plate assembly, comprising the steps of,
a) sleeving the sealing ring on the step part of the valve plate, and adjusting the sealing ring to enable the gap between the inner wall of the sealing ring and the outer wall of the step part to be uniform;
b) pressing the sealing ring by the pressing ring, and connecting the sealing ring with the valve plate through a screw to enable the sealing ring to be pressed and fixed;
c) firstly, a flat key is arranged in a key groove of a valve rod, and then the valve rod is arranged in a mounting hole on a valve plate;
d) positioning the position of the valve rod penetrating through the valve plate by scribing a position on the valve rod, drilling corresponding pin holes on the valve rod and the valve plate, and installing a cylindrical pin, wherein the cylindrical pin penetrates through the valve plate and the valve rod and is in spot welding with the valve rod and the valve plate to lock the valve rod and the valve plate, so that the assembly of a new valve plate assembly is completed;
e) and removing impurities of the new valve plate assembly, and carrying out oil-forbidden degreasing treatment on the new valve plate assembly.
Optionally, in step a), the inner side wall of the sealing ring and the outer side wall of the valve plate are both concavely provided with semi-arc grooves, the sealing ring is rotated to align the two semi-arc grooves to form a positioning cavity, and a positioning pin is installed in the positioning cavity to enable the gap between the inner side wall of the sealing ring and the outer side wall of the step portion to be uniform.
Optionally, in step e), when the new valve plate assembly is degreased, the new valve plate assembly is irradiated by the ultraviolet lamp to check whether the new valve plate assembly is qualified.
Optionally, when disassembling the old valve plate assembly, the following steps are included,
a) the connecting nut connecting the upper valve cover and the valve body is disassembled;
b) disassembling the upper valve cover;
d) disassembling the middle bearing;
d) and after the old valve plate assembly is integrally rotated by 180 degrees by rotating the valve rod, the pressing ring faces to a medium inlet on the side face of the valve body, and the old valve plate assembly is taken out from the maintenance window on the top of the valve body to finish the disassembly of the old valve plate assembly.
Optionally, when installing a new valve plate assembly into the valve body, comprising the steps of,
a) removing impurities in the valve body;
b) the pressing ring of the new valve plate assembly faces a medium inlet on the side face of the valve body, then the new valve plate assembly is installed in the valve body through an inspection window on the top of the valve body, the valve rod extends into the lower bearing hole, and the bottom end of the valve rod abuts against the upper end face of the lower valve cover;
c) rotating the valve rod to enable the new valve plate assembly to integrally rotate for 180 degrees, enabling the pressing ring to face a medium outlet on the side face of the valve body, and enabling the sealing ring to be matched with a sealing face of the valve body to form a sealing pair;
d) the middle bearing and the upper valve cover are sequentially arranged, and the upper valve cover and the valve body are connected through a connecting nut;
e) and the valve rod is rotated to ensure that the pressing ring is circularly switched between the opposite medium inlet and the opposite medium outlet until the valve runs smoothly, so that the replacement of a new valve plate assembly is completed.
The beneficial effect of adopting the above optional scheme is: the valve plate assembly modularized online replacement and assembly device is simple and convenient to operate, low in operation difficulty, high in replacement efficiency and capable of achieving modularized online replacement and assembly of the valve plate assembly, and improves the one-time assembly qualified rate.
Drawings
FIG. 1 is a schematic structural diagram of a butterfly valve according to an embodiment of the invention;
FIG. 2 is a schematic view of a valve plate assembly of a butterfly valve according to an embodiment of the invention;
FIG. 3 shows a cross-sectional view A-A of FIG. 2;
fig. 4 is an enlarged schematic view of a portion B in fig. 2.
Description of reference numerals
1, a valve body;
11 a media inlet;
12 a medium outlet;
13, repairing the window;
14 a lower bearing;
2, a lower valve cover;
3, an upper valve cover;
31 an upper bearing;
32 a packing assembly;
33 lip-shaped sealing rings;
34 connecting a nut;
41 a valve plate;
42 a seal ring;
43 pressing a ring;
44 positioning pins;
45 a valve stem;
46 cylindrical pins;
47 a valve seat gasket;
48 screws;
49 flat keys;
and 5, sealing gaskets.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship between the terms and the corresponding elements may be made without substantial technical changes.
Before describing embodiments of the present invention in detail, the present invention will be described in an application environment. The technology of the invention is mainly applied to the assembly of the triple eccentric butterfly valve under the working condition of ultralow temperature (lower than-196 ℃), in particular to the online quick replacement of the valve plate of the butterfly valve, thereby improving the replacement efficiency, simplifying the replacement steps, reducing the replacement difficulty and the like.
As shown in fig. 1 to 4, the butterfly valve of the invention comprises a valve body 1 and a valve plate assembly, wherein two opposite sides of the valve body 1 are respectively provided with a medium inlet 11 and a medium outlet 12, the top of the valve body 1 is provided with an inspection window 13, the bottom of the valve body 1 is provided with a lower valve cover 2, the valve plate assembly is arranged in the valve body 1 through the inspection window 13, the valve plate assembly is arranged in the inspection window at the top of the valve body 1 to avoid repeatedly falling or squaring the valve body, and the butterfly valve is simple to operate. After the valve plate assembly is installed in the valve body, the lower end of the valve plate assembly props against the lower valve cover 2, and the lower end of the valve plate assembly is matched with the lower valve cover, so that the valve plate assembly is quickly installed in place. The upper valve cover 3 is connected with the upper end of the valve plate assembly and presses the valve plate assembly to limit the valve plate assembly to move up and down in the valve body.
As shown in fig. 1 to 4, the valve plate assembly includes a valve plate 41 and a valve rod 45, the valve rod 45 penetrates through the valve plate 41 and is locked with the valve plate 41 through a cylindrical pin 46, one end of the valve plate 41 is in a step-shaped structure, the end is provided with a step portion, a sealing ring 42 is sleeved on the step portion of the valve plate and presses the sealing ring 42 through a pressing ring 43, and a valve seat gasket 47 is arranged between an end surface of the sealing ring 42 and an end surface of the valve plate 41. Wherein, all concavely be equipped with the semicircle groove on the inside wall of sealing washer 42 and the lateral wall of step portion, two semicircle grooves are aimed at and are formed the location chamber, and the radius of two semicircle grooves is the same, forms cylindric location chamber, installs locating pin 44 in this location intracavity, realizes the quick location of sealing washer 42 and step portion through the locating pin to guarantee that the clearance of sealing washer 42 inside wall and step portion lateral wall is even.
The invention also provides an online quick-change assembling method for the valve plate of the butterfly valve, which comprises the following steps: preparing all parts of a valve to be assembled, and cleaning the parts; assembling a new valve plate assembly; disassembling the old valve plate assembly; and a new valve plate assembly is installed into the valve body 1 from the top of the valve body 1. The valve plate assembly is assembled in advance, then the valve plate assembly is assembled into the valve body from the top of the valve body, and the modular assembly is adopted, so that the overall quick-change assembly is realized, the difficulty in online assembly and replacement of the valve plate is simplified, the one-time assembly qualification rate is improved, the assembly method is simple and effective, and the operation is time-saving and labor-saving.
When cleaning the valve body, the valve plate, the valve rod, the sealing ring, the pressing ring, the upper valve cover, the lower valve cover and other parts of the valve to be assembled, the flash and the burr on the surface of each part need to be checked and removed; if there are parts on the surface of the surfacing or welding, the impurities such as welding slag and the like need to be removed. And then, cleaning all parts by using an inorganic non-combustible cleaning agent, wherein the inorganic non-combustible cleaning agent can be acetone or alcohol, performing oil prohibition and degreasing treatment after cleaning, and irradiating the parts by using an ultraviolet lamp to check whether the oil prohibition and the degreasing treatment are qualified. And then, key parts such as a valve body sealing surface, a sealing ring and the like are inspected to ensure that the valve body cannot be scratched or scratched, so that good sealing performance is guaranteed after assembly. And (4) placing the parts subjected to cleaning treatment, oil prohibition and degreasing treatment at a drying ventilation position to completely volatilize and dry the cleaning solution on the surfaces of the parts.
When assembling a new valve plate assembly, the method comprises the following steps: a) with sealing washer 42 suit on the step portion of valve plate 41, rotate sealing washer 42 for the semicircle trough on the sealing washer 42 and the semicircle trough on the step portion aim at the location chamber that forms cylindric structure, install locating pin 44 at the location intracavity and make sealing washer 42 inside wall and step portion lateral wall clearance even unanimous, make the sealing washer can the rapid Assembly target in place, and avoid the sealing washer to appear shifting when carrying out follow-up operation after the assembly targets in place. b) The pressing ring 43 is sleeved on the valve plate 41, the inner end surface of the pressing ring 43 presses the outer end surface of the sealing ring 42, and the pressing ring passes through the pressing ring 43 through the screw 48 and then is connected with the valve plate 41, so that the sealing ring 41 is further locked and fixed, and the assembling stability of the sealing ring is improved. c) The flat key 49 is first fitted into the key groove of the valve rod 45, and then the valve rod 45 is fitted into the mounting hole of the valve plate 41. d) The position of the valve rod 45 penetrating through the valve plate 41 is marked and positioned through the position of the valve rod 45, after the valve rod 45 is assembled on the valve plate 41 in place, the corresponding pin holes are drilled in the valve rod 45 and the valve plate 41, the cylindrical pins 46 are installed, penetrate through the valve plate 41 and the valve rod 45, and are in spot welding with the valve rod 45 and the valve plate 41, so that the valve rod 45 and the valve plate 41 are locked, and the assembly of a new valve plate assembly is completed. e) And removing impurities from the new valve plate assembly, carrying out oil-forbidden degreasing treatment on the new valve plate assembly, and irradiating the new valve plate assembly by an ultraviolet lamp to detect whether the treatment is qualified or not when the new valve plate assembly is degreased.
When the old valve plate assembly is disassembled, the method comprises the following steps: a) the coupling nut 34 coupling the upper bonnet 3 and the valve body 1 is removed. b) The upper bonnet 3 and the lip seal 33, the packing assembly 32, the upper bearing 31, and other parts in the upper bonnet 3 are removed. c) And (3) detaching the middle bearing 15 at the joint of the upper valve cover 3 and the valve body 1. d) And rotating the valve rod 45, driving the old valve plate assembly to integrally rotate by 180 degrees by the valve rod 45, enabling the pressing ring 48 to face the medium inlet 11 on the side surface of the valve body 1, integrally taking out the old valve plate assembly from the top maintenance window 13 of the valve body 1, and completing the disassembly of the old valve plate assembly.
When a new valve plate assembly is installed in the valve body, the method comprises the following steps: a) and removing impurities in the valve body 1. b) Firstly, the clamping ring 43 of the new valve plate assembly faces the medium inlet 11 on the side face of the valve body 1, then the new valve plate assembly is integrally installed in the valve body 1 through the top maintenance window 13 of the valve body 1, the valve rod 45 extends into a hole of the lower bearing 14 in the valve body 1, the bottom end of the valve rod 45 abuts against the upper end face of the lower valve cover 2, the new valve body assembly is quickly and accurately located in the vertical direction of the valve body, the positions of the valve plate and the valve body do not need to be adjusted up and down, the operation is simple, the efficiency is improved, the sealing gasket 5 is arranged between the bottom of the lower valve cover 2 and the bottom of the valve body 1, the sealing performance of the assembly joint of. c) And the valve rod 45 is rotated, the valve rod 45 drives the new valve plate assembly to integrally rotate for 180 degrees, the pressing ring 43 faces the medium outlet 12 on the side surface of the valve body 1, and the sealing ring 42 is matched with the sealing surface of the valve body 1 to form a sealing pair. d) After the new valve plate assembly is assembled in place, the middle bearing 15, parts in the upper valve cover and the upper valve cover 3 are sequentially arranged, and the upper valve cover 3 and the valve body 1 are connected through the connecting nut 34. e) The valve rod 45 is rotated to enable the pressing ring 43 to be switched between the position right opposite to the medium inlet 11 and the position right opposite to the medium outlet 12 in a circulating mode until the valve runs smoothly, the sealing performance of the sealing pair is good, and replacement of a new valve plate assembly is completed.
According to the invention, the valve plate assembly is assembled in advance, and is rapidly replaced in a modularized manner, so that the whole rapid replacement of the valve plate assembly during online maintenance is realized, the operation is simple and easy, and the operation is time-saving and labor-saving. And the valve plate assembly realizes the quick positioning of the sealing ring and the valve plate by arranging the positioning cavity and the positioning pin in the assembling process, solves the problem that the sealing ring needs to be adjusted repeatedly in the traditional butterfly valve assembling process, reduces the assembling difficulty, is convenient to assemble in place at one time, and improves the assembling qualified rate.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A butterfly valve, its characterized in that: the valve plate assembly is arranged in the valve body through the maintenance window, the lower end of the valve plate assembly props against the lower valve cover, the upper valve cover is connected with the upper end of the valve plate assembly, and the valve plate assembly is pressed to limit the valve plate assembly to move up and down in the valve body;
the valve plate assembly comprises a valve plate and a valve rod, the valve rod penetrates through the valve plate and is locked with the valve plate through a cylindrical pin, a sealing ring is sleeved on a step portion of the valve plate and is compressed by a pressing ring, a semi-arc groove is concavely arranged on the inner side wall of the sealing ring and the outer side wall of the step portion, the two semi-arc grooves are aligned to form a positioning cavity, and a positioning pin for positioning the sealing ring is installed in the positioning cavity.
2. An online quick-change assembling method for a valve plate of a butterfly valve according to claim 1, characterized in that: the method comprises the following steps of preparing all parts of a valve to be assembled, and cleaning the parts;
assembling a new valve plate assembly;
disassembling the old valve plate assembly;
and (4) loading a new valve plate assembly into the valve body from the top of the valve body.
3. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 2, characterized in that: when cleaning each part of the valve to be assembled, firstly, cleaning all parts by adopting an inorganic non-combustible cleaning agent, then carrying out oil prohibition and degreasing treatment, and checking whether the treatment is qualified.
4. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 3, characterized in that: the inorganic non-combustible cleaning agent is acetone or alcohol.
5. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 4, characterized in that: and when checking whether the oil prohibition and the degreasing treatment are qualified or not, irradiating the parts by an ultraviolet lamp.
6. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 2, characterized in that: when assembling a new valve plate assembly, the method comprises the following steps,
a) sleeving the sealing ring on the step part of the valve plate, and adjusting the sealing ring to enable the gap between the inner wall of the sealing ring and the outer wall of the step part to be uniform;
b) pressing the sealing ring by the pressing ring, and connecting the sealing ring with the valve plate through a screw to enable the sealing ring to be pressed and fixed;
c) firstly, a flat key is arranged in a key groove of a valve rod, and then the valve rod is arranged in a mounting hole on a valve plate;
d) positioning the position of the valve rod penetrating through the valve plate by scribing a position on the valve rod, drilling corresponding pin holes on the valve rod and the valve plate, and installing a cylindrical pin, wherein the cylindrical pin penetrates through the valve plate and the valve rod and is in spot welding with the valve rod and the valve plate to lock the valve rod and the valve plate, so that the assembly of a new valve plate assembly is completed;
e) and removing impurities of the new valve plate assembly, and carrying out oil-forbidden degreasing treatment on the new valve plate assembly.
7. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 6, characterized in that: in the step a), the inner side wall of the sealing ring and the outer side wall of the valve plate are both concavely provided with semi-arc grooves, the sealing ring is rotated to enable the two semi-arc grooves to be aligned to form a positioning cavity, and a positioning pin is arranged in the positioning cavity to enable the gap between the inner side wall of the sealing ring and the outer side wall of the step part to be uniform.
8. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 6, characterized in that: in the step e), when the new valve plate assembly is degreased, the new valve plate assembly is irradiated by an ultraviolet lamp to check whether the treatment is qualified.
9. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 2, characterized in that: when the old valve plate assembly is disassembled, the method comprises the following steps,
a) the connecting nut connecting the upper valve cover and the valve body is disassembled;
b) disassembling the upper valve cover;
c) disassembling the middle bearing;
d) and after the old valve plate assembly is integrally rotated by 180 degrees by rotating the valve rod, the pressing ring faces to a medium inlet on the side face of the valve body, and the old valve plate assembly is taken out from the maintenance window on the top of the valve body to finish the disassembly of the old valve plate assembly.
10. The online quick-change assembling method for the valve plate of the butterfly valve according to claim 2, characterized in that: when a new valve plate assembly is installed into the valve body, the method comprises the following steps,
a) removing impurities in the valve body;
b) the pressing ring of the new valve plate assembly faces a medium inlet on the side face of the valve body, then the new valve plate assembly is installed in the valve body through an inspection window on the top of the valve body, the valve rod extends into the lower bearing hole, and the bottom end of the valve rod abuts against the upper end face of the lower valve cover;
c) rotating the valve rod to enable the new valve plate assembly to integrally rotate for 180 degrees, enabling the pressing ring to face a medium outlet on the side face of the valve body, and enabling the sealing ring to be matched with a sealing face of the valve body to form a sealing pair;
d) the middle bearing and the upper valve cover are sequentially arranged, and the upper valve cover and the valve body are connected through a connecting nut;
e) and the valve rod is rotated to ensure that the pressing ring is circularly switched between the opposite medium inlet and the opposite medium outlet until the valve runs smoothly, so that the replacement of a new valve plate assembly is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910218042.5A CN109826965B (en) | 2019-03-21 | 2019-03-21 | Butterfly valve and online quick-change type assembling method for valve plate of butterfly valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910218042.5A CN109826965B (en) | 2019-03-21 | 2019-03-21 | Butterfly valve and online quick-change type assembling method for valve plate of butterfly valve |
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| CN109826965A CN109826965A (en) | 2019-05-31 |
| CN109826965B true CN109826965B (en) | 2020-04-14 |
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Families Citing this family (3)
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| CN110303319B (en) * | 2019-07-22 | 2022-02-08 | 中国电建集团河南工程有限公司 | Method for constructing novel oriental 660MW valve |
| CN111765283B (en) * | 2020-07-07 | 2022-09-02 | 北京瑞拓江南自控设备有限公司 | Top-mounted butterfly valve |
| CN116428373B (en) * | 2023-06-09 | 2023-08-15 | 新乡煜昊机电设备有限公司 | Quick core-changing valve for heat supply pipeline |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5427354A (en) * | 1994-06-03 | 1995-06-27 | Keystone International Holdings Corp. | Valve assembly |
| CN201475370U (en) * | 2009-08-24 | 2010-05-19 | 凯泰阀门(集团)有限公司 | Top-mounted butterfly valve |
| JP2012013159A (en) * | 2010-07-01 | 2012-01-19 | Sekisui Chem Co Ltd | Butterfly valve |
| CN201866275U (en) * | 2010-11-29 | 2011-06-15 | 高能阀门集团有限公司 | Top-mounted butterfly valve |
| CN204610886U (en) * | 2015-01-31 | 2015-09-02 | 浙江北泽阀门科技有限公司 | Soft sealing butterfly valve sealing pair structure |
| CN205479389U (en) * | 2016-03-31 | 2016-08-17 | 精工阀门有限公司 | Top -mounted butterfly valve |
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