CN223648566U - Ultralow-temperature hard-sealing triple-eccentric butterfly valve - Google Patents
Ultralow-temperature hard-sealing triple-eccentric butterfly valveInfo
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- CN223648566U CN223648566U CN202423117953.4U CN202423117953U CN223648566U CN 223648566 U CN223648566 U CN 223648566U CN 202423117953 U CN202423117953 U CN 202423117953U CN 223648566 U CN223648566 U CN 223648566U
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Abstract
本实用新型涉及三偏心蝶阀领域，具体涉及一种超低温硬密封三偏心蝶阀，所述阀体内形成有主流道，主流道内密封设置有蝶板，蝶板与阀杆相连接，执行机构驱动阀杆旋转，通过阀杆带动蝶板在阀体内旋转，实现介质的阻断或流通；蝶板与主流道通过蝶板密封组件进行密封，所述蝶板密封组件可拆卸设置于蝶板和阀体之间；所述阀体上密封设置有阀盖，所述阀盖包括上阀盖和延长阀盖，所述阀体顶部形成有顶部操作孔和顶部安装孔，顶部操作孔上密封装配有上阀盖，顶部安装孔内装配有所述阀杆，所述延长阀盖套装在阀杆外，延长阀盖底部与顶部安装孔上表面密封配合。本实用新型采用可拆卸的蝶板密封组件，配合阀体的顶部操作孔，可对阀门进行在线维修和更换。
This utility model relates to the field of triple eccentric butterfly valves, specifically to a cryogenic hard-seal triple eccentric butterfly valve. The valve body has a main flow channel, within which a butterfly plate is sealed. The butterfly plate is connected to a valve stem. An actuator drives the valve stem to rotate, which in turn rotates the butterfly plate within the valve body, achieving media blocking or flow. The butterfly plate and the main flow channel are sealed by a butterfly plate sealing assembly, which is detachably mounted between the butterfly plate and the valve body. A valve cover is sealed on the valve body, comprising an upper valve cover and an extended valve cover. The top of the valve body has a top operating hole and a top mounting hole. The upper valve cover is sealed on the top operating hole, and the valve stem is mounted in the top mounting hole. The extended valve cover is fitted over the valve stem, with its bottom sealingly engaging with the upper surface of the top mounting hole. This utility model employs a detachable butterfly plate sealing assembly, which, in conjunction with the top operating hole of the valve body, allows for online maintenance and replacement of the valve.
Description
Technical Field
The utility model relates to the field of triple offset butterfly valves, in particular to an ultralow-temperature hard-seal triple offset butterfly valve.
Background
The butterfly valve is a regulating valve with simple structure, can be used for on-off control of low-pressure pipeline medium, is generally used for occasions with low requirements on normal temperature, low pressure and tightness, and is successively subjected to evolution from concentricity to single eccentricity, double eccentricity and triple eccentricity along with continuous development of modern process technology and material industry to meet the requirements of various working conditions. The triple offset butterfly valve is widely used for various important pipelines such as process control in various industrial fields such as electric power, petrochemical industry, metallurgical steelmaking, water treatment, natural gas exploitation, offshore platforms and the like due to the excellent performance. The existing triple offset butterfly valve structure adopts a butterfly plate integrated sealing structure, has poor sealing performance, cannot adapt to low-temperature working conditions, and has serious defects in the use process.
Disclosure of utility model
According to the defects of the prior art, the utility model aims to provide a hard sealing triple eccentric butterfly valve which can be suitable for a low-temperature structure and improves the sealing performance of the valve.
The technical scheme includes that the ultralow-temperature hard-seal triple offset butterfly valve comprises a valve body, a valve rod, a butterfly plate and an actuating mechanism, wherein a main flow channel is formed in the valve body, the butterfly plate is arranged in the main flow channel in a sealing mode, the actuating mechanism drives the valve rod to rotate, the butterfly plate is driven by the valve rod to rotate in the valve body to block or circulate media, the butterfly plate and the main flow channel are sealed through a butterfly plate sealing assembly, the butterfly plate sealing assembly is detachably arranged between the butterfly plate and the valve body, a valve cover is arranged on the valve body in a sealing mode, the valve cover comprises an upper valve cover and an extension valve cover, a top operation hole and a top installation hole are formed in the top of the valve body, the upper valve cover is hermetically sealed on the top operation hole, the valve rod is arranged in the top installation hole, the extension valve cover is sleeved outside the valve rod, and the bottom of the extension valve cover is hermetically matched with the upper surface of the top installation hole.
Further, the butterfly plate sealing assembly comprises a butterfly plate sealing ring and a pressing ring, the butterfly plate sealing ring is arranged on the butterfly plate sealing surface at the periphery of the butterfly plate, the butterfly plate sealing ring is assembled and fixed through the pressing ring, the valve body is internally provided with a valve seat assembly, the valve seat assembly comprises a valve seat detachably arranged in the valve body, a valve seat sealing ring is arranged between the side surface of the valve seat and the valve body, a hard metal sealing layer is formed on the valve seat sealing surface on the inner diameter surface of the valve seat, and the valve seat sealing surface is in sealing fit with the outer peripheral surface of the butterfly plate sealing ring.
Further, the valve seat sealing surface is a conical surface.
Further, be provided with the assembly groove that is used for assembling the butterfly plate sealing washer on the outer peripheral face of butterfly plate, the outer peripheral face of butterfly plate sets up step structure, the clamping ring assembly is on step structure, step structure links up with the assembly groove mutually, and the terminal surface of clamping ring supports to hold and compresses tightly the butterfly plate sealing washer on the terminal surface of butterfly plate sealing washer.
Further, the valve seat assembly further comprises a valve seat pressing plate, a fastening ring, fastening bolts, four open rings and a positioning pin, the positioning pin is arranged between the valve seat and the valve body, the valve seat pressing plate is arranged on one side, far away from the valve seat sealing ring, of the valve seat, the four open rings are embedded in the valve body, the fastening ring and the four open rings are assembled in a positioning mode, a plurality of fastening bolts are connected to the fastening ring in a threaded mode, and the fastening bolts are abutted to the surface of the valve seat pressing plate to enable the valve seat pressing plate to be pressed on the side surface of the valve seat.
Further, the valve rod is connected with the butterfly plate through a key and is fixed through a bolt, an upper supporting sleeve and a lower supporting sleeve which are sleeved on the valve rod and used for positioning and supporting the butterfly plate are respectively supported between the upper end and the lower end of the butterfly plate and the valve body.
Further, the valve cover further comprises a lower valve cover, a bottom mounting hole for assembling the valve rod is formed in the bottom of the valve body, the bottom mounting hole and the top mounting hole are arranged in an up-down centering mode, and the lower valve cover is connected with the valve body through a stud nut.
Further, the upper end face of the lower valve cover is matched with the lower surface of the bottom mounting hole in a step-type manner and is sealed through a winding gasket and a spring energy storage ring, and the winding gasket and the spring energy storage ring are arranged on the two step faces in a staggered manner.
Further, the inner wall of the bottom mounting hole is provided with a sliding bearing which is in rotary fit with the valve rod.
Further, the valve rod bottom is provided with the dog, along the spacing backstop cooperation in vertical direction between dog and the valve body, be provided with the backstop groove that corresponds with the dog in the lower valve gap, be provided with dish spring and supporting pad from bottom to top in the backstop groove, the dish spring supports the supporting pad with the spacing backstop of dog cooperation.
Further, the extension valve cover is connected with the valve body through a stud nut, the lower end face of the extension valve cover is matched with the upper surface of the top mounting hole in a step-type manner and is sealed through a winding gasket and a spring energy storage ring, and the winding gasket and the spring energy storage ring are arranged on the two step faces in a staggered manner.
Further, the inner wall of the top mounting hole is provided with a sliding bearing which is in rotary fit with the valve rod.
Further, a drip tray is arranged on the outer surface of the extension valve cover.
Further, the upper valve cover is connected with the valve body through a stud nut, and an upper valve cover gasket is arranged between the upper valve cover and the valve body.
Further, the ultralow temperature hard seal triple offset butterfly valve further comprises a support, the executing structure is arranged on the support, and the top end of the extension valve cover is fixedly connected with the support through a stud nut.
Further, the inner wall of the extension valve cover is formed with a sealing fit section, a contact fit section and a clearance fit section from top to bottom, the sealing fit section of the extension valve cover is in sealing fit with the valve rod through the sealing packing group, the contact fit section of the extension valve cover is in contact fit with the valve rod, the axis of the valve rod is positioned, and the clearance fit section of the extension valve cover is in clearance fit with the valve rod.
Further, the sealing packing set is arranged between the upper part of the extension valve cover and the valve rod, the sealing packing set comprises a packing pressing plate, a packing pressing sleeve, packing, a packing pad and a packing set spring energy storage ring, a sealing caulking groove is formed in a sealing matching section of the upper part of the extension valve cover, the packing set spring energy storage ring, the packing pad and the packing are sequentially arranged in the sealing caulking groove from bottom to top, the packing is in sealing fit with the valve rod, the packing pressing sleeve and the packing pressing plate are sequentially arranged above the packing, a matching surface between the packing pressing sleeve and the packing pressing plate is a conical surface, the packing pressing plate is connected with the extension valve cover through a pressing bolt, and the head of the pressing bolt is pre-tightened with the packing pressing plate through a spring.
Further, a spring groove is formed in the outer peripheral surface of the valve rod in the radial direction, an anti-static spring is assembled in the spring groove, one end of the anti-static spring abuts against the bottom of the spring groove, the other end of the anti-static spring abuts against an anti-static steel ball, and the anti-static steel ball is in contact with the inner wall of the valve body and used for guiding and supporting when the valve rod rotates.
The butterfly plate is connected with the valve rod through a key and is fastened through a screw, and the butterfly plate is driven to synchronously rotate through the rotation of the valve rod.
The ultralow temperature hard seal triple offset butterfly valve has the beneficial effects that the ultralow temperature hard seal triple offset butterfly valve adopts the detachable butterfly plate sealing assembly, and is matched with the top operation hole of the valve body, so that the valve body can not be detached under the condition that the butterfly plate sealing assembly is damaged, and the valve can be maintained and replaced on line through the top operation hole.
Drawings
FIG. 1 is a schematic diagram of an ultralow temperature hard seal triple offset butterfly valve;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is an enlarged view of FIG. 1 at B;
FIG. 4 is an enlarged view of the portion I of FIG. 3;
FIG. 5 is an enlarged view of FIG. 1 at C;
FIG. 6 is an enlarged view of FIG. 1 at D;
In the figure, 1, a support, 2, a packing pressing sleeve, 3, packing, 4, a packing pad, 5, a packing group spring energy storage ring, 6, an extension valve cover, 601, a sealing matching section, 602, a contact matching section, 603, a clearance matching section, 7, a liquid dropping disc, 8, a winding gasket, 9, a spring energy storage ring, 10, a sliding bearing, 11, an upper supporting sleeve, 12, a butterfly plate, 13, a key, 14, a valve rod, 15, a lower supporting sleeve, 16, a valve body, 17, a supporting pad, 18, a disc spring, 19, a lower valve cover, 20, an actuating mechanism, 21, an upper valve cover, 22, an upper valve cover gasket, 23, a four-way ring, 24, a fastening ring, 25, a valve seat, 26, a butterfly plate sealing ring, 27, a pressing ring, 28, a locating pin, 29, a fastening bolt, 30, a locking steel wire, 31, a valve seat sealing ring, 32, a valve seat sealing surface, 33, a valve seat pressing plate, 34, a stop, 35, an antistatic spring, 36, an antistatic pressing plate, 37, a packing, 38 and a pressing bolt are shown.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
Referring to fig. 1, the ultralow temperature hard seal triple eccentric butterfly valve comprises a valve body 16, a valve rod 14, a butterfly plate 12 and an actuating mechanism 20, wherein the valve body 16 is of an integral casting structure, two ends of the valve body 16 are connected with a pipeline in a welded mode, a main flow channel is formed in the valve body 16, the butterfly plate 12 is arranged in the main flow channel in a sealing mode, the butterfly plate 12 is connected with the valve rod 14, the actuating mechanism 20 drives the valve rod 14 to rotate, the butterfly plate 12 is driven by the valve rod 14 to rotate in the valve body 16 to block or circulate media, the butterfly plate 12 and the main flow channel are sealed through a butterfly plate sealing assembly, the butterfly plate sealing assembly is detachably arranged between the butterfly plate 12 and the valve body 16, a valve cover is arranged on the valve body 16 in a sealing mode, the valve cover comprises an upper valve cover 21 and an extension valve cover 6, a top operation hole and a top installation hole are formed in the top operation hole, the top installation hole is provided with the upper valve cover 21 in a sealing mode, the valve rod 14 is arranged in the top installation hole in the inner portion, the extension valve cover 6 is sleeved outside the valve rod 14, the bottom of the extension valve cover 6 is in a sealing mode, and the upper surface of the top installation hole is in a sealing mode, and the top operation hole is arranged on the inlet side.
Based on above-mentioned technical scheme, the valve body adopts the integral casting structure, and handsome in appearance saves space and material, and both ends and pipeline adopt the welding form, reduce and reveal the risk. The top operation hole and the upper valve cover 21 mainly play a role in facilitating maintenance of the seal in the valve body, and the seal in the valve body can be maintained by opening the upper valve cover 21 without disassembling the valve body. The flange on the valve adopts an ISO5211 standard flange design, and can meet the installation of various actuating mechanisms such as an electric actuating mechanism, a pneumatic actuating mechanism, a manual actuating mechanism and the like.
Further, the butterfly plate sealing assembly comprises a butterfly plate sealing ring 26 and a pressing ring 27, the butterfly plate sealing ring 26 is arranged on the butterfly plate sealing surface at the periphery of the butterfly plate, the butterfly plate sealing ring 26 is assembled and fixed through the pressing ring 27, the valve body 16 is internally provided with a valve seat assembly, the valve seat assembly comprises a valve seat 25 detachably arranged in the valve body 16, a valve seat sealing ring 31 is arranged between the side surface of the valve seat 25 and the valve body 16, a hard metal sealing layer is formed on a valve seat sealing surface 32 on the inner diameter surface of the valve seat 25, and the valve seat sealing surface 32 is in sealing fit with the outer peripheral surface of the butterfly plate sealing ring 26.
Based on the technical scheme, the butterfly plate sealing surface adopts an independent butterfly plate sealing ring 26 structure, and the independent butterfly plate sealing ring has self-centering performance when closing the valve, so that the sealing effect is remarkably improved compared with an integrated butterfly plate sealing ring, and meanwhile, the butterfly plate sealing ring has online maintainability and can be replaced online.
Further, the valve seat sealing surface 32 is a conical surface, and the inner diameter of the valve seat sealing surface 32 gradually increases along the medium flow direction. The conical surface can ensure the interference fit state with the butterfly plate sealing ring 26, and the sealing effect of the butterfly plate sealing ring 26 and the valve seat sealing surface 32 is ensured. The valve seat 25 is a movable valve seat, when the valve is closed, the valve seat moves towards the butterfly plate under the pressure of fluid medium, the butterfly plate sealing ring 26 is compressed, and the butterfly plate sealing ring 26 is in sealing fit with the valve seat sealing surface 32, so that the higher the pressure is, the larger the compression amount of the butterfly plate sealing ring 26 is, and the more reliable the butterfly valve is sealed.
Further, an assembling groove for assembling the butterfly plate sealing ring 26 is formed in the outer peripheral surface of the butterfly plate 12, a step structure is formed in the outer peripheral surface of the butterfly plate 12, the pressing ring 27 is assembled on the step structure, the step structure is connected with the assembling groove, and the end face of the pressing ring 27 abuts against the end face of the butterfly plate sealing ring 26 to press the butterfly plate sealing ring 26.
Further, the valve seat assembly further comprises a valve seat pressing plate 33, a fastening ring 24, fastening bolts 29, four open rings 23 and a positioning pin 28, the positioning pin 28 is arranged between the valve seat 25 and the valve body 26, the valve seat pressing plate 33 is arranged on one side, far away from the valve seat sealing ring 31, of the valve seat 25, the four open rings 23 are embedded in the valve body 26, the fastening ring 24 and the four open rings 23 are assembled in a positioning mode, a plurality of fastening bolts 29 are connected to the fastening ring 24 in a threaded mode, and a plurality of fastening bolts 29 are abutted to the surface of the valve seat pressing plate 33, so that the valve seat pressing plate 33 is pressed on the side surface of the valve seat 25. The valve seat adopts an independent replaceable structure, so that the valve body can be prevented from being disassembled under the condition that the sealing surface of the valve seat is damaged, and the valve seat is replaced on line.
Based on above-mentioned technical scheme, the top operation hole sets up in valve body 16 entry side, and valve seat subassembly sets up in the entry side of valve body sprue, and valve seat subassembly and butterfly plate seal assembly are the detachable setting, can carry out online maintenance and online change to valve seat subassembly and the butterfly plate seal assembly of valve body inside through the top operation hole.
Further, the valve rod 14 is in key connection with the butterfly plate 12 and is fixed through bolts, an upper supporting sleeve 11 and a lower supporting sleeve 15 for positioning and supporting the butterfly plate are sleeved on the valve rod 14, and the upper supporting sleeve 11 and the lower supporting sleeve 15 are respectively supported between the upper end and the lower end of the butterfly plate 12 and the valve body 16.
Further, the valve cover further comprises a lower valve cover 19, a bottom mounting hole for assembling a valve rod is formed in the bottom of the valve body 16, the bottom mounting hole and the top mounting hole are arranged in an up-down centering mode, and the lower valve cover 19 is connected with the valve body 16 through a stud nut.
Further, the upper end surface of the lower valve cover 19 is matched with the lower surface of the bottom mounting hole in a step-like manner and is sealed by the winding gasket 8 and the spring energy storage ring 9, and the winding gasket 8 and the spring energy storage ring 9 are arranged on the two step surfaces in a staggered manner.
Further, the bottom mounting hole inner wall is provided with a sliding bearing 10 in rotational engagement with the valve stem 14.
Further, a stop block 34 is arranged at the bottom end of the valve rod 14, the stop block 34 is matched with the valve body 16 along the vertical direction in a limiting and blocking manner, a stop groove corresponding to the stop block 34 is arranged in the lower valve cover 19, a disc spring 18 and a supporting pad 17 are arranged in the stop groove from bottom to top, and the disc spring 18 supports the supporting pad 17 to be matched with the stop block 34 in a limiting and blocking manner.
Further, the extension valve cover 6 is connected with the valve body 16 through a stud nut, the lower end face of the extension valve cover 6 is matched with the upper surface of the top mounting hole in a step-type manner and is sealed through the winding gasket 8 and the spring energy storage ring 9, and the winding gasket 8 and the spring energy storage ring 9 are arranged on the two step faces in a staggered manner. The spring energy storage ring and the winding gasket double-sealing structure are adopted between the extension valve cover and the valve body, the spring energy storage ring and the winding gasket are assembled on two step surfaces and are arranged in a staggered mode in the horizontal direction and the vertical direction, so that labyrinth seal is formed, and the sealing effect is guaranteed.
Further, the top mounting hole inner wall is provided with a sliding bearing 10 in rotational engagement with the valve stem 14.
Further, a drip tray 7 is arranged on the outer surface of the extension valve cover 6. The butterfly valve of the embodiment is an ultralow-temperature butterfly valve, a low-temperature medium flows through the valve body, and the liquid dropping disc 7 is used for receiving condensate on the valve.
Further, the upper valve cover 21 is connected with the valve body 16 through a stud nut, and an upper valve cover gasket 22 is arranged between the upper valve cover 21 and the valve body 16. The upper valve cover gasket 22 is used for sealing between the upper valve cover 21 and the upper end surface of the top operation hole.
Further, the ultralow temperature hard sealing triple offset butterfly valve further comprises a support 1, the execution structure 20 is arranged on the support 1, and the top end of the extension valve cover 6 is fixedly connected with the support 1 through a stud nut. The actuating structure 20 is keyed to the valve stem to rotate the valve stem.
Further, a seal matching section 601, a contact matching section 602 and a clearance matching section 603 are formed on the inner wall of the extension valve cover 6 from top to bottom, the seal matching section of the extension valve cover 6 is in seal matching with the valve rod 14 through a seal packing group, the contact matching section of the extension valve cover 6 is in contact matching with the valve rod 14, the axis of the valve rod 14 is positioned, the clearance matching section of the extension valve cover 6 is in clearance matching with the valve rod 14, and friction in the rotation process of the valve rod is reduced.
Further, the sealing packing set is arranged between the upper part of the extension valve cover 6 and the valve rod 14, the sealing packing set comprises a packing pressing plate 37, a packing pressing sleeve 2, packing 3, a packing pad 4 and a packing set spring energy storage ring 5, a sealing caulking groove is formed in a sealing matching section of the upper part of the extension valve cover 6, the packing set spring energy storage ring 5, the packing pad 4 and the packing 3 are sequentially arranged in the sealing caulking groove from bottom to top, the packing 3 is in sealing fit with the valve rod 14, the packing pressing sleeve 2 and the packing pressing plate 37 are sequentially arranged above the packing 3, the matching surface between the packing pressing sleeve 2 and the packing pressing plate 37 is a conical surface, a self-centering effect and a pressing and tightening effect can be formed, the packing pressing plate 37 is connected with the extension valve cover 6 through a pressing bolt 38, and the head of the pressing bolt is pre-tightened with the packing pressing plate 37 through a spring.
Based on the technical scheme, the long valve rod and the extended valve cover structure are suitable for the ultralow temperature valve, and the sealing packing group at the top end of the valve is prevented from being influenced by low temperature media.
Further, a spring groove is radially arranged on the outer circumferential surface of the valve rod 14, an anti-static spring 35 is assembled in the spring groove, one end of the anti-static spring 35 abuts against the bottom of the spring groove, the other end of the anti-static spring 35 abuts against an anti-static steel ball 36, and the anti-static steel ball 36 is in contact with the inner wall of the valve body 16 and used for guiding and supporting when the valve rod 14 rotates.
Further, the valve rod 14 is of an integral structure, the butterfly plate 12 is connected with the valve rod 14 in a key way and fastened through screws, and the butterfly plate 12 is driven to synchronously rotate through rotation of the valve rod 14.
The ultra-low temperature hard seal triple offset butterfly valve is suitable for liquefied natural gas media and other media with the temperature higher than-196 ℃. The working principle of the ultralow-temperature hard-seal triple-eccentric butterfly valve is that an actuating mechanism rotates a valve rod by 90 degrees anticlockwise to drive a butterfly plate to rotate, a valve is opened, a medium passes through the valve from an inlet side, and the actuating mechanism rotates the valve rod by 90 degrees clockwise to drive the butterfly plate to rotate, the valve is closed, and the medium in a pipeline is cut off. The three eccentric values of the three eccentric butterfly valve are designed by adopting three-dimensional software dynamic simulation analysis, the design meets the full differential pressure sealing requirements in forward and reverse directions, the three eccentric butterfly valve is a torsion type sealing butterfly valve, the sealing is reliable, and the three eccentric butterfly valve can bear the working requirements of high pressure, high temperature, low temperature and the like.
It should be noted that the detailed portions of the present utility model are not described in the prior art.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The foregoing list is only the preferred embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.
Claims (8)
1. The ultralow temperature hard sealing triple eccentric butterfly valve is characterized by comprising a valve body, a valve rod, a butterfly plate and an actuating mechanism, wherein a main flow channel is formed in the valve body, the butterfly plate is arranged in the main flow channel in a sealing way, the butterfly plate is connected with the valve rod, the actuating mechanism drives the valve rod to rotate, the butterfly plate is driven by the valve rod to rotate in the valve body to block or circulate media, the butterfly plate and the main flow channel are sealed through a butterfly plate sealing assembly, the butterfly plate sealing assembly is detachably arranged between the butterfly plate and the valve body, a valve cover is arranged on the valve body in a sealing way, the valve cover comprises an upper valve cover and an extension valve cover, a top operation hole and a top installation hole are formed in the top of the valve body, the upper valve cover is hermetically sealed in the top installation hole, the extension valve cover is sleeved outside the valve rod, and the bottom of the extension valve cover is in sealing fit with the upper surface of the top installation hole;
The valve rod is connected with the butterfly plate key and is fixed through a bolt, an upper supporting sleeve and a lower supporting sleeve for positioning and supporting the butterfly plate are sleeved on the valve rod, and the upper supporting sleeve and the lower supporting sleeve are respectively supported between the upper end and the lower end of the butterfly plate and the valve body;
The valve cover further comprises a lower valve cover, a bottom mounting hole for assembling a valve rod is formed in the bottom of the valve body, the bottom mounting hole is vertically centered with the top mounting hole, the lower valve cover is connected with the valve body through a stud nut, the upper end face of the lower valve cover is matched with the lower surface of the bottom mounting hole in a stepped mode and is sealed through a winding gasket and a spring energy storage ring, the winding gasket and the spring energy storage ring are arranged on two stepped faces in a staggered mode, a sliding bearing in rotary fit with the valve rod is arranged on the inner wall of the bottom mounting hole, a stop block is arranged at the bottom end of the valve rod, limiting stop fit is conducted between the stop block and the valve body in the vertical direction, a stop groove corresponding to the stop block is formed in the lower valve cover, a disc spring and a supporting pad are arranged in the stop groove from bottom to top, and the supporting pad is matched with the stop block in a limiting stop mode.
2. The ultralow-temperature hard sealing triple offset butterfly valve of claim 1 is characterized in that the butterfly plate sealing assembly comprises a butterfly plate sealing ring and a pressing ring, the butterfly plate sealing ring is arranged on the butterfly plate sealing ring at the periphery of the butterfly plate and is assembled and fixed through the pressing ring, the valve body is internally provided with a valve seat assembly, the valve seat assembly comprises a valve seat detachably arranged in the valve body, a valve seat sealing ring is arranged between the side surface of the valve seat and the valve body, a hard metal sealing layer is formed on the valve seat sealing surface on the inner diameter surface of the valve seat, the valve seat sealing surface is a conical surface, and the valve seat sealing surface is in sealing fit with the outer peripheral surface of the butterfly plate sealing ring.
3. The ultralow-temperature hard seal triple offset butterfly valve of claim 2, wherein the outer peripheral surface of the butterfly plate is provided with an assembling groove for assembling a butterfly plate sealing ring, the outer peripheral surface of the butterfly plate is provided with a step structure, the pressing ring is assembled on the step structure, the step structure is connected with the assembling groove, and the end surface of the pressing ring is abutted against the end surface of the butterfly plate sealing ring to press the butterfly plate sealing ring.
4. The ultralow temperature hard seal triple offset butterfly valve of claim 2, wherein the valve seat assembly further comprises a valve seat pressing plate, a fastening ring, fastening bolts, four open rings and a positioning pin, the positioning pin is arranged between the valve seat and the valve body, the valve seat pressing plate is arranged on one side of the valve seat, which is far away from the valve seat sealing ring, the four open rings are embedded in the valve body, the fastening ring and the four open rings are assembled in a positioning way, a plurality of fastening bolts are connected to the fastening ring in a threaded manner, and the fastening bolts are abutted against the surface of the valve seat pressing plate to enable the valve seat pressing plate to be pressed on the side surface of the valve seat.
5. The ultralow temperature hard sealing triple offset butterfly valve of any one of claims 1-4 is characterized in that the extension valve cover is connected with the valve body through a stud nut, the lower end face of the extension valve cover is matched with the upper surface of a top mounting hole in a step mode and sealed through a winding gasket and a spring energy storage ring, the winding gasket and the spring energy storage ring are arranged on two step faces in a staggered mode, a sliding bearing in rotary fit with a valve rod is arranged on the inner wall of the top mounting hole, the upper valve cover is connected with the valve body through the stud nut, and an upper valve cover gasket is arranged between the upper valve cover and the valve body.
6. The ultralow temperature hard seal triple offset butterfly valve according to any one of claims 1-4 is characterized by further comprising a support, wherein the actuating mechanism is arranged on the support, the top end of the extension valve cover is fixedly connected with the support through a stud nut, a seal fit section, a contact fit section and a clearance fit section are formed on the inner wall of the extension valve cover from top to bottom, the seal fit section of the extension valve cover is in seal fit with the valve rod through a seal packing set, the contact fit section of the extension valve cover is in contact fit with the valve rod, the axis of the valve rod is positioned, the clearance fit section of the extension valve cover is in clearance fit with the valve rod, the seal packing set is arranged between the upper part of the extension valve cover and the valve rod, the seal packing set comprises a packing pressing plate, a packing pressing sleeve, a packing pad and a packing set spring energy storage ring, a packing pad and packing are sequentially arranged in the seal caulking groove from bottom to top, a packing pressing sleeve and packing are sequentially arranged above the packing, a conical surface between the packing pressing sleeve and the packing pressing plate is in clearance fit with the valve cover through a packing bolt.
7. The ultralow temperature hard seal triple offset butterfly valve according to any one of claims 1 to 4, wherein a spring groove is formed in the outer peripheral surface of the valve rod in the radial direction, an antistatic spring is assembled in the spring groove, one end of the antistatic spring is abutted against the bottom of the spring groove, the other end of the antistatic spring is abutted against an antistatic steel ball, and the antistatic steel ball is in contact with the inner wall of the valve body and used for guiding and supporting when the valve rod rotates.
8. The ultralow temperature hard seal triple offset butterfly valve of any one of claims 1-4, wherein the valve body is of an integral casting structure, two ends of the valve body are welded with the pipeline, and the valve rod is of an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423117953.4U CN223648566U (en) | 2024-12-17 | 2024-12-17 | Ultralow-temperature hard-sealing triple-eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423117953.4U CN223648566U (en) | 2024-12-17 | 2024-12-17 | Ultralow-temperature hard-sealing triple-eccentric butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223648566U true CN223648566U (en) | 2025-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202423117953.4U Active CN223648566U (en) | 2024-12-17 | 2024-12-17 | Ultralow-temperature hard-sealing triple-eccentric butterfly valve |
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| Country | Link |
|---|---|
| CN (1) | CN223648566U (en) |
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- 2024-12-17 CN CN202423117953.4U patent/CN223648566U/en active Active
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