CN216078331U - Upper-mounted three-eccentric bidirectional hard-seal ultralow-temperature butterfly valve capable of being maintained on line - Google Patents
Upper-mounted three-eccentric bidirectional hard-seal ultralow-temperature butterfly valve capable of being maintained on line Download PDFInfo
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- CN216078331U CN216078331U CN202023317700.3U CN202023317700U CN216078331U CN 216078331 U CN216078331 U CN 216078331U CN 202023317700 U CN202023317700 U CN 202023317700U CN 216078331 U CN216078331 U CN 216078331U
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Abstract
The utility model relates to an upper-mounted three-eccentric bidirectional hard seal ultralow-temperature butterfly valve capable of being maintained online, which comprises a valve body (1), a lengthened valve cover (2), a valve rod (3), a butterfly plate (4), a valve seat (5), a sealing ring (6), a valve seat pressing plate (7) and the like, wherein all the components are assembled and connected; the middle part of the valve body (1) is of an oval structure, and the valve body is directly fastened and connected with the maintenance cover (8) through a full-thread stud and a hexagon nut (12) and is sealed through a metal winding pad (13). The position of the maintenance bin of the low-temperature butterfly valve is arranged at the middle way, so that an upper-mounted structure can be realized, and all internal parts can be directly mounted or maintained from the middle way; the middle crossing and the maintenance cover of the valve body are both in an oval structure and are fixedly connected through bolts and nuts, and the middle of the valve body is sealed through a metal winding gasket, so that zero leakage of the outer seal of the valve body is ensured; compared with the conventional low-temperature butterfly valve with the overhaul bin, the structure length of the butterfly valve is shortened by nearly one third, the weight of the valve body is reduced, and the material cost is reduced.
Description
Technical Field
The utility model relates to the technical field of liquefied petroleum and natural gas ultralow temperature valves, in particular to an upper-mounted type ultralow temperature butterfly valve with three eccentric bidirectional hard seals and online maintainability.
Background
The butterfly valve is a valve with a closing part butterfly plate in a disc shape, and the butterfly plate rotates 0-90 degrees around the axis of a valve rod to open or close the valve, is widely applied to industrial pipelines of metallurgy, electric power, petrochemical industry, water supply and drainage, municipal engineering and the like, and mainly plays roles in adjusting medium flow and cutting off.
The triple eccentricity of the triple eccentric hard seal butterfly valve means that: the rotation center of the butterfly plate is eccentric relative to the axial direction between the sealing sections of the butterfly valve, the radial direction between the rotation center of the butterfly plate and the center line of the valve body, and the angle formed by the angle between the rotation center line of the valve seat and the center line of the valve body. Because of the angular eccentricity, the sealing surface of the triple offset butterfly valve is elliptical and belongs to surface sealing. Different from a conventional butterfly valve circular line sealing structure, the three-eccentric center butterfly valve is more excellent in sealing performance and sealing performance, and particularly for flammable and explosive low-temperature media, zero leakage can be guaranteed through the excellent sealing performance, and accidents are effectively reduced.
The structure of most three-eccentric two-way sealing ultralow temperature butterfly valves in the market at present is shown in figure 1, and the butterfly valve comprises a valve body 1 ', wherein the valve body 1' is a main medium circulation passage and mainly comprises a valve cavity inlet, a valve cavity outlet, a maintenance bin hole and a valve body middle passage hole; a lengthened valve cover 2 'is arranged at a middle hole of the valve body 1'; one end of a valve rod 3 'penetrates through the lengthened valve cover 2' through a middle hole of the valve body 1 ', then penetrates through a center hole of the support 9' to be connected with the actuating mechanism 10 ', the other end of the valve rod is fixed on the butterfly plate 4' through a pin, the butterfly plate 4 'is fixed in a valve cavity of the valve body 1', the sealing ring 6 'is fastened on the butterfly plate 4' through the sealing pressing plate 11 ', a tight and reliable sealing pair is formed with the movable valve seat 5' mounted on the valve body 1 ', and the valve seat pressing plate 7' and the four-open ring 12 'fix the movable valve seat 5' through fastening screws.
Conventional three-eccentric low-temperature belt maintenance bin butterfly valves in the prior art all adopt a side-mounted type belt maintenance bin structure, and internal parts are installed after extending into the side-mounted type belt maintenance bin structure from a maintenance bin opening, so that the overall structural length of the valve is lengthened, the weight of the valve is increased by about one third, and the overall cost of the valve is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an upper-mounted type three-eccentric bidirectional hard seal ultralow-temperature butterfly valve capable of being maintained on line, and the butterfly valve with the structure can realize an upper-mounted type mounting mode, namely all internal parts are mounted from a middle channel hole, so that the overall structural length of the valve is shortened by about one third, the overall weight of the valve is reduced, the material cost is saved, the function of online maintenance is also met, and the valve is convenient to assemble and maintain.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides an upper-mounted three-eccentric bidirectional hard seal online maintainable ultralow-temperature butterfly valve which comprises a valve body, a lengthened valve cover, a valve rod, a butterfly plate, a valve seat, a sealing ring, a valve seat pressing plate, a maintenance cover, a support, a sealing pressing plate, a four-open ring and a bottom cover, wherein the valve body is assembled and connected with the lengthened valve cover, the valve rod, the butterfly plate, the valve seat, the sealing ring, the valve seat pressing plate, the maintenance cover, the support, the sealing pressing plate, the four-open ring and the bottom cover; the middle part of the valve body is of an oval structure, and the valve body is directly fastened and connected with the maintenance cover through a full-thread stud and a hexagon nut and is sealed through a metal winding pad.
Preferably, the valve rod is provided with an upper bushing and a lower bushing.
In any of the above technical solutions, preferably, one end of the valve rod is fastened to the butterfly plate through a slope pin, and extends into the valve cavity from the middle channel, so that the butterfly plate is fixed in the valve cavity of the valve body.
In any of the above technical solutions, preferably, the other end of the valve rod passes through the lengthened valve cover and the bracket, is connected with the operating mechanism through a key, and rotates 0 to 90 degrees together with the valve rod under the action of the operating device to open and close the valve, so as to regulate the circulation of the medium.
In any of the above technical solutions, preferably, the valve seat is welded with a hard alloy sealing surface, the valve seat is installed to extend into the inner cavity of the valve body from the maintenance bin port, and the valve seat pressing plate extends into the valve cavity from the maintenance bin port and is sleeved on the valve seat, and the valve seat pressing plate is positioned by the fastening screw and the four open rings, so that the valve seat is fastened on the valve body.
In any of the above technical solutions, preferably, the seal ring is locked on the butterfly plate by the seal pressing plate and the fastening screw.
In any of the above technical solutions, preferably, the bead weld sealing surface of the valve seat is matched with the sealing surface of the sealing ring to form a complete sealing pair.
In any of the above technical solutions, it is preferable that the graphite packing further includes a packing pressing sleeve and a packing gland, the packing gland and the packing pressing sleeve are fastened by fastening screws, and the flexible graphite packing is fixed at the packing box, so as to ensure compact packing.
In any of the above technical solutions, preferably, the bracket is connected to the extension valve cover through a bolt, and the upper portion of the bracket is connected with the operating mechanism through a key slot.
In any of the above technical solutions, it is preferable that the water-cooling device further includes a water-cooling disc welded to the lengthened valve cover, so as to ensure that the temperature of the filler is above 0 ℃ under the low-temperature working condition, and prevent the filler from being frozen to affect sealing and increase the torque for opening and closing the valve.
Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:
the utility model discloses an upper-mounted three-eccentric bidirectional hard seal online-maintainable ultralow-temperature butterfly valve, which comprises a cavity convenient for medium circulation, wherein two ends of a valve cavity are provided with a circulating inlet and a circulating outlet, the top of the valve cavity is provided with an oval middle channel hole, and the lower part of the valve cavity is provided with a positioning hole. The oval valve cover is tightly connected with the oval opening at the top of the valve body through a bolt, an annular sealing gasket is arranged in the middle of the oval valve cover, one end of the lengthened valve cover is connected with the valve cover through a bolt, and the other end of the lengthened valve cover is connected with the support and the operating mechanism together. The butterfly plate stretches into the valve body cavity through the elliptical hole at the top of the valve body, then sequentially penetrates the valve rod through the hole at the top of the valve body, then penetrates through the hole of the butterfly plate, and is fixed in the positioning hole at the bottom of the valve body. The valve rod is tightly connected with a butterfly plate in the valve cavity by adopting an inclination pin, the other end of the valve rod extends out of a hole in the top of the valve body, sequentially penetrates through the lengthened valve cover and the stuffing box, and is connected with the operating mechanism through a key, so that the butterfly plate and the valve rod rotate together under the action of the operating device. The valve seat is fastened on the valve body through the valve seat pressing plate and the four open rings, and the valve seat is subjected to surfacing welding of hard alloy to form a reliable sealing structure with the sealing ring arranged on the butterfly plate.
Compared with the conventional three-eccentric two-way hard seal ultralow temperature butterfly valve capable of being maintained online, the elliptic maintenance cabin structure of the valve body moves to the valve rod hole at the top of the valve body, and simultaneously, the valve cover is changed into an elliptic shape according to the top opening of the valve body and is fastened and connected by bolts. The valve seat adopts a floating valve seat structure, is fastened on the valve body through a valve seat pressing plate and four open rings, and is welded with hard alloy to form reliable hard seal with a sealing ring arranged on the butterfly plate. When the valve is opened, the butterfly plate can be easily separated from the sealing surface of the valve seat, when the valve is closed, a reliable sealing pair is formed between the sealing ring and the valve seat, and when a medium enters from the inlet end of the valve body, the medium force acts on the butterfly plate and the sealing ring, so that the sealing surface is tighter.
When the conventional three-eccentric butterfly valve with the maintenance bin is installed, all internal parts extend into the maintenance bin from the maintenance bin opening at the side edge, and the internal parts such as the butterfly plate, the valve seat and the like can be directly installed from the oval opening at the top of the valve body by adopting the upper-installation type three-eccentric butterfly valve, so that the structural length of the valve is shortened, the weight of the valve is reduced, and the cost is saved. Meanwhile, when the valve is maintained on the pipeline, the valve is not required to be maintained after being detached from the pipeline, but the lengthened valve cover and the valve cover can be directly detached from the top of the valve, and then the butterfly plate, the valve rod and other internal parts of the valve are sequentially detached for maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional three-eccentric-belt maintenance bin bidirectional hard-sealing low-temperature butterfly valve in the prior art.
FIG. 2 is a schematic diagram of the overall structure of a preferred embodiment of the top-loading three-eccentric bidirectional hard seal online serviceable ultra-low temperature butterfly valve according to the present invention;
fig. 3 is a schematic view illustrating a valve seat mounting structure of the embodiment of fig. 1 of the top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve according to the present invention.
Reference numerals: 1-valve body, 2-lengthened valve cover, 3-valve rod, 4-butterfly plate, 5-valve seat, 6-sealing ring, 7-valve seat pressing plate, 8-maintenance cover, 9-bracket, 10-sealing pressing plate, 11-four-open ring, 12-full thread stud, hexagon nut, 13-metal winding pad, 14-upper and lower shaft sleeve, 15-bottom cover, 16-filler, 17-filler pressing sleeve, 18-filler pressing plate, 19-drip tray and 20-fastening screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to overcome the problems that in the side-mounted type structure with a maintenance bin, internal parts are required to be installed after extending into the structure from a maintenance bin opening, so that the overall structural length of a valve is lengthened, the weight of the valve is increased by about one third, the overall cost of the valve is high, and the like, in the ultra-low temperature butterfly valve with the top-mounted type three-eccentric bidirectional hard seal, the embodiment of the utility model provides a top-mounted type mounting mode, namely all the internal parts are installed from a middle channel hole, so that the overall structural length of the valve is shortened by about one third, the overall weight of the valve is reduced, the material cost is saved, the online maintenance function is met, and the assembly and the maintenance of the valve are convenient.
The structure, characteristics and implementation form of the top-mounted triple-eccentric bidirectional hard seal online maintenance ultralow-temperature butterfly valve of the embodiment are described below with reference to fig. 2 and 3.
The upper-mounted three-eccentric bidirectional hard seal ultralow-temperature butterfly valve capable of being maintained online mainly comprises a valve body 1, a lengthened valve cover 2, a valve rod 3, a butterfly plate 4, a valve seat 5, a sealing ring 6, a valve seat pressing plate 7, a maintenance cover 8, a support 9, a sealing pressing plate 10, a four-open ring 11, a metal winding pad 13, an upper shaft sleeve 14, a lower shaft sleeve 14, a bottom cover 15, a filler 16, a filler pressing sleeve 17, a filler pressing plate 18 and a drip tray 19, wherein all the components are assembled and connected. The middle part of the valve body 1 is of an oval structure, and the middle part is directly fastened and connected with the maintenance cover 8 by adopting a bolt and a nut 12 and is sealed by adopting a metal winding pad 13. One end of the valve rod 3 is fastened with the butterfly plate 4 through an inclination pin and extends into the valve cavity from the middle channel, so that the butterfly plate 4 is fixed in the valve cavity of the valve body 1, the other end of the valve rod 3 penetrates through the lengthened valve cover 2 and the support 9 and is connected with the operating mechanism through a key, and the valve rod rotate together for 0-90 degrees under the action of the operating device, so that the opening and closing of the valve are realized, and the circulation of a medium is adjusted. The valve seat 5 is welded with a hard alloy sealing surface and extends into the inner cavity of the valve body 1 from the maintenance bin port when the valve seat 5 is installed. Meanwhile, the valve seat pressing plate 7 also extends into the valve cavity from the maintenance bin opening and is sleeved on the valve seat 5, and the valve seat pressing plate 7 is positioned through the fastening screw 20 and the four-open ring 11, so that the valve seat 5 is fastened on the valve body. The sealing ring 6 is locked on the butterfly plate 4 through the sealing pressure plate 10 and the fastening screw 20, and at the moment, the surfacing sealing surface of the valve seat 5 is matched with the sealing surface of the sealing ring 6 to form a complete sealing pair. The packing gland 18 and the packing gland sleeve 17 are fastened through a fastening screw 20, the flexible graphite packing 16 is fixed at the packing box, and the packing is tightly pressed. The bracket 9 is connected on the lengthened valve cover 2 through a bolt, and the upper part of the bracket is connected with the operating mechanism through a key slot. The drip tray 19 is welded on the lengthened valve cover 2, so that the temperature of the filler is ensured to be above 0 ℃ under the low-temperature working condition, the influence of icing on sealing is prevented, and the opening and closing torque of the valve is increased.
The super low temperature butterfly valve of the three eccentric two-way hard seals of upper assembling of this embodiment can maintain on line mainly by valve body 1, extension valve gap 2, valve rod 3, butterfly plate 4, disk seat 5, sealing washer 6, disk seat clamp plate 7, maintenance lid 8, support 9, seal clamp plate 10, four open-loop 11, full thread double-screw bolt, hexagon nut 12, metal winding pad 13, upper and lower axle sleeve 14, bottom 15, pack 16, pack and press the cover 17, pack clamp plate 18, drip tray 19, fastening screw 20 is constituteed, the position in low temperature butterfly valve's maintenance storehouse is arranged at the center way department, can realize the upper assembling structure, all internals all can be directly from the installation of center way department or maintenance. The middle opening of the valve body and the maintenance cover both adopt an oval structure and are fixedly connected through bolts and nuts, and the middle part of the valve body is sealed through a metal winding gasket, so that zero leakage of the outer seal is ensured. Compared with the conventional low-temperature butterfly valve with the overhaul bin, the structure length of the butterfly valve is shortened by nearly one third, the weight of the valve body is reduced, and the material cost is reduced.
The valve body is a cavity for facilitating medium circulation, the two ends of the valve cavity are an inlet and an outlet for medium circulation, the middle passage is an oval opening, and the bottom of the valve cavity is provided with a positioning hole. One end of the valve rod sequentially penetrates through the lengthened valve cover, the sealing filler in the sealing box, the filler gasket, the filler pressing plate, the filler pressing sleeve and the support, and is finally connected with the actuator through a key. The other end of the butterfly valve penetrates through a butterfly plate hole, is fastened with the butterfly plate and is finally installed in a positioning hole in the bottom of the valve body. The butterfly plate is installed in the valve body cavity, adopts the slope pin fastening on the valve rod, rotates 0 to 90 degrees with the valve rod under operating means's effect together to realize opening and close of valve, thereby the circulation of adjusting medium. The valve cover is in an oval shape, the size of the valve cover needs to ensure that the butterfly plate and other internal parts can be installed from the position, the valve cover and the valve body are tightly fastened by bolts, and an annular sealing gasket is arranged in the middle of the valve cover. The valve seat adopts a floating valve seat structure, is fastened on the valve body through a valve seat pressure plate and four open rings, and is welded with a hard alloy sealing surface to form reliable hard sealing with a sealing ring arranged on the butterfly plate. The lengthened valve cover is fastened on the valve cover through bolts, and the middle of the lengthened valve cover is sealed by a metal winding gasket.
In the specific implementation:
as shown in figure 2, the upper-mounted three-eccentric bidirectional hard seal ultralow temperature butterfly valve capable of being maintained online comprises a fluid inlet, a fluid outlet, a middle channel hole with an oval top and a valve rod mounting positioning hole at the bottom, wherein the fluid inlet and the fluid outlet are convenient for medium circulation. The valve body 1 and the maintenance cover 8 are fastened by bolts and nuts 12, and a metal winding pad 13 is arranged between the valve body 1 and the maintenance cover to ensure that the outer seal of the valve meets the technical requirements.
The valve seat 5 is welded with a hard alloy sealing surface, the hard alloy sealing surface extends into the inner cavity of the valve body 1 from the maintenance bin port when the valve seat 5 is installed, and the sealing surface is oval, so that a large surface and a small surface exist, and the installation direction of the valve seat needs to be noticed. Meanwhile, the valve seat pressing plate 7 also extends into the valve cavity from the maintenance bin opening and is sleeved on the valve seat, the valve seat pressing plate 7 is positioned through the fastening screw 20 and the four-open ring 11, and the valve seat is fastened on the valve body.
The butterfly plate 4 is fastened at the square groove of the valve rod 3 through a cylindrical pin and extends into the square groove from the maintenance bin opening, the lower end of the valve rod 3 extends into the positioning hole at the lower end of the valve body 1, a lower shaft sleeve 14 is arranged at the lower end of the valve rod, and a bottom cover is arranged at the lower end of the valve body 1 through welding to support the valve rod 3. The sealing ring 6 is locked on the butterfly plate 4 through the sealing pressure plate 10 and the fastening screw, the directions of the large surface and the small surface of the sealing ring 6 need to be noticed at the moment, the sealing ring is ensured to be superposed with the large surface and the small surface of the valve seat 5, and the butt welding sealing surface of the valve seat 5 and the sealing surface of the sealing ring 6 are matched to form a complete sealing pair at the moment.
The lengthened valve cover 2 penetrates through the valve rod 3 and is fastened with the maintenance cover 8 through bolts, a metal winding gasket 13 is arranged between the lengthened valve cover 2 and the maintenance cover, and zero leakage of the middle channel seal of the valve is guaranteed through a locking nut and the winding gasket.
The drip tray 19 is welded on the lengthened valve cover, so that the temperature of the filler is ensured to be above 0 ℃ under the low-temperature working condition, the influence of icing on sealing is prevented, and the opening and closing torque of the valve is increased.
The packing gland 18 and the packing gland sleeve 17 are fastened through bolts, and the flexible graphite packing 16 is fixed at the packing box, so that the packing is tightly pressed. The support 9 is connected to the lengthened valve cover 2 through a bolt, and the upper part of the support is connected with the operating mechanism through a key slot.
The maintenance bin opening is arranged at the middle channel, so that the whole structural length of the valve is reduced, the weight of the valve is reduced, the material cost is reduced, and meanwhile, the structure form of a top-mounted type can be realized.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the utility model; the above description is only for the specific embodiment of the present invention, and is not intended to limit the scope of the present invention; any modification, equivalent replacement, improvement and the like of the technical solution of the present invention by a person of ordinary skill in the art without departing from the design spirit of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims (10)
1. The utility model provides a super low temperature butterfly valve of three eccentric two-way hard seals of upper assembling type can maintain on line, includes valve body (1), extension valve gap (2), valve rod (3), butterfly plate (4), disk seat (5), sealing washer (6), disk seat clamp plate (7), maintenance lid (8), support (9), seal clamp plate (10), four ring opening (11) and bottom (15), valve body (1) and extension valve gap (2), valve rod (3), butterfly plate (4), disk seat (5), sealing washer (6), disk seat clamp plate (7), maintenance lid (8), support (9), seal clamp plate (10), four ring opening (11), bottom (15) be assembled between and be connected, its characterized in that: the middle part of the valve body (1) is of an oval structure, and the valve body is directly fastened and connected with the maintenance cover (8) through a full-thread stud and a hexagon nut (12) and is sealed through a metal winding pad (13).
2. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: the valve rod (3) is provided with an upper shaft sleeve and a lower shaft sleeve (14).
3. The top-loading three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 2, wherein: one end of the valve rod (3) is fastened with the butterfly plate (4) through an inclination pin and extends into the valve cavity from the middle channel, so that the butterfly plate (4) is fixed in the valve cavity of the valve body (1).
4. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 3, wherein: the other end of the valve rod (3) penetrates through the lengthened valve cover (2) and the support (9), is connected with the operating mechanism through a key, and rotates 0-90 degrees together with the valve rod (3) under the action of the operating device to open and close the valve, so that the circulation of a medium is adjusted.
5. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: the hard alloy sealing surface is welded on the valve seat (5), the valve seat (5) extends into the inner cavity of the valve body (1) from the maintenance bin opening, meanwhile, the valve seat pressing plate (7) extends into the valve cavity from the maintenance bin opening and is sleeved on the valve seat (5), and the valve seat pressing plate (7) is positioned through the fastening screw (20) and the four-open ring (11), so that the valve seat (5) is fastened on the valve body (1).
6. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: the sealing ring (6) is locked on the butterfly plate (4) through a sealing pressure plate (10) and a fastening screw (20).
7. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: and a surfacing sealing surface of the valve seat (5) is matched with a sealing surface of the sealing ring (6) to form a complete sealing pair.
8. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: the flexible graphite packing is characterized by further comprising a packing pressing sleeve (17) and a packing pressing cover (18), wherein the packing pressing cover (18) and the packing pressing sleeve (17) are fastened through fastening screws (20), the flexible graphite packing (16) is fixed at a packing box, and the packing (16) is guaranteed to be tightly pressed.
9. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: the support (9) is connected to the lengthened valve cover (2) through a bolt, and the upper portion of the support is connected with the operating mechanism through a key slot.
10. The top-loading type three-eccentric bidirectional hard seal online maintainable ultra-low temperature butterfly valve of claim 1, wherein: the water-saving valve further comprises a water dropping disc (19), and the water dropping disc (19) is welded on the lengthened valve cover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023317700.3U CN216078331U (en) | 2020-12-31 | 2020-12-31 | Upper-mounted three-eccentric bidirectional hard-seal ultralow-temperature butterfly valve capable of being maintained on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023317700.3U CN216078331U (en) | 2020-12-31 | 2020-12-31 | Upper-mounted three-eccentric bidirectional hard-seal ultralow-temperature butterfly valve capable of being maintained on line |
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| CN216078331U true CN216078331U (en) | 2022-03-18 |
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| CN202023317700.3U Active CN216078331U (en) | 2020-12-31 | 2020-12-31 | Upper-mounted three-eccentric bidirectional hard-seal ultralow-temperature butterfly valve capable of being maintained on line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654156A (en) * | 2022-11-14 | 2023-01-31 | 大连船用阀门有限公司 | Bidirectional-sealing low-torque triple-eccentric ventilation butterfly valve |
| CN118269022A (en) * | 2024-05-08 | 2024-07-02 | 湖北泰和石化设备有限公司 | Laser precision positioning's three eccentric butterfly valve butterfly plate anchor clamps |
-
2020
- 2020-12-31 CN CN202023317700.3U patent/CN216078331U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654156A (en) * | 2022-11-14 | 2023-01-31 | 大连船用阀门有限公司 | Bidirectional-sealing low-torque triple-eccentric ventilation butterfly valve |
| CN118269022A (en) * | 2024-05-08 | 2024-07-02 | 湖北泰和石化设备有限公司 | Laser precision positioning's three eccentric butterfly valve butterfly plate anchor clamps |
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