CN214662198U - On-line maintenance ultra-low temperature high-performance ball valve - Google Patents
On-line maintenance ultra-low temperature high-performance ball valve Download PDFInfo
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- CN214662198U CN214662198U CN202120755176.3U CN202120755176U CN214662198U CN 214662198 U CN214662198 U CN 214662198U CN 202120755176 U CN202120755176 U CN 202120755176U CN 214662198 U CN214662198 U CN 214662198U
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Abstract
The utility model belongs to the technical field of the ultra-low temperature ball valve, concretely relates to online maintenance ultra-low temperature high performance ball valve. The utility model discloses a valve body subassembly is three formula designs, during the use, the inlet end portion takeover with the outlet end portion takeover respectively with inlet pipe and outlet pipe welding, valve seat subassembly, spheroid etc. fix at valve body main part pipe fitting inner chamber, when needing the maintenance, dismantle the removable fastener of connecting inlet flange, valve body main part pipe fitting, outlet flange, can demolish ball valve major structure, inlet valve seat subassembly and outlet valve seat subassembly all adopt threaded connection to fix the both ends in valve body main part pipe fitting, consequently the utility model provides an ultra-low temperature ball valve can realize quick assembly disassembly, is favorable to online maintenance, improves the life of valve.
Description
Technical Field
The utility model belongs to the technical field of the ultra-low temperature ball valve, concretely relates to online maintenance ultra-low temperature high performance ball valve.
Background
The ball valve is driven by a valve rod and rotates around the axis of the ball valve, and can be used for regulating and controlling fluid in the fields of petroleum, petrifaction, chemical industry, power plants, metallurgy and the like. In the low-temperature medium working condition of the LNG system, higher requirements are provided for the low-temperature ball valve, and the functional requirements of online maintainability, high performance, zero leakage, long service life and the like are provided. The existing low-temperature ball valve can not be maintained and replaced on line, or as a common upper-mounted ball valve, the disassembly speed and the disassembly efficiency caused by the reasons of large quantity of parts, complex valve structure, limited space in the valve and the like during online maintenance and replacement are low, and the original ball body, the sealing ring and the energy storage ring Lip-seal are easy to damage, so that the service life of the whole valve is greatly shortened, and the whole valve is scrapped in advance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide an online maintenance ultralow temperature high performance ball valve.
The utility model discloses the technical scheme who takes as follows: the online maintenance ultra-low temperature high-performance ball valve comprises a valve body assembly, an inlet valve seat assembly, an outlet valve seat assembly, a ball body, a driving valve rod and a driving mechanism;
the valve body assembly comprises an inlet end connecting pipe, an inlet connecting flange, a valve body main pipe fitting, an outlet end connecting pipe and an outlet connecting flange, wherein the inlet connecting flange and the outlet connecting flange are respectively connected and fastened with two ends of the valve body main pipe fitting through detachable fasteners;
one end of the inlet end connecting pipe is positioned in the inlet connecting flange, a convex block is arranged on the outer periphery of the part of the inlet end connecting pipe, which is positioned in the inlet connecting flange, a limiting convex ring is arranged on the inner periphery of the inlet connecting flange, and the convex block arranged on the inlet end connecting pipe is positioned on one side, close to the valve body main pipe fitting, of the limiting convex ring of the inlet connecting flange;
one end of the outlet end connecting pipe is positioned in the outlet connecting flange, and a convex block is arranged on the outer periphery of the part of the outlet end connecting pipe, which is positioned in the outlet connecting flange;
the two ends of the inner periphery of the valve body main pipe fitting are respectively provided with an internal thread part, the inlet valve seat component and the outlet valve seat component are respectively fixed at the two ends in the valve body main pipe fitting through threaded connection, the ball body is arranged between the inlet valve seat component and the outlet valve seat component, and the driving valve rod penetrates through the valve body main pipe fitting and extends into the inner cavity to be connected with the ball body to drive the ball body to rotate so as to realize opening and closing;
an inlet sealing gasket is arranged between the inlet end connecting pipe and the inlet valve seat assembly, and under the fastening action of the detachable fastening piece, the inlet sealing gasket is extruded by the inlet end connecting pipe and the inlet valve seat assembly to form a sealing action;
an outlet sealing gasket is arranged between the outlet end connecting pipe and the outlet valve seat assembly, and is extruded by the outlet end connecting pipe and the outlet valve seat assembly to form a sealing effect under the fastening effect of the detachable fastening piece;
the minimum distance between an assembly formed by connecting the inlet end connecting pipe and the inlet connecting flange and an assembly formed by connecting the outlet end connecting pipe and the outlet connecting flange is a, the maximum width of the assembly formed by connecting the valve body main pipe fitting, the inlet valve seat assembly and the outlet valve seat assembly is b, and a is larger than or equal to b.
The periphery of the inlet connecting flange and the periphery of the outlet connecting flange are both provided with annular caulking grooves, and the lug is formed by embedding four open rings in the annular caulking grooves.
The inlet valve seat assembly comprises an inlet valve seat mounting ring and an inlet valve seat arranged on the inner periphery of the inlet valve seat mounting ring, wherein a first external thread part is arranged on the outer periphery of the inlet valve seat mounting ring and is in threaded fit with an internal thread part at one end of a valve body main pipe fitting;
the inlet valve seat comprises a first inlet valve seat part and a second inlet valve seat part, wherein the first convex ring part is arranged on the inner periphery of the inlet valve seat mounting ring, the second convex ring part is arranged on the inner periphery of the first convex ring part, and the first inlet valve seat part is arranged on one side, close to the sphere, of the first convex ring part;
a plurality of first spring limiting holes which are distributed in an annular mode at equal intervals are formed in the end face of one side, close to the ball body, of the first convex ring part, and a plurality of springs which are limited through the first spring limiting holes are arranged between the first convex ring part and the first inlet valve seat part;
a certain distance is arranged between the outer periphery of the second inlet valve seat part and the inner periphery of the first convex ring part to form a first sealed cavity, a single-sealed energy storage ring and a first positioning ring are arranged in the first sealed cavity, the sealed end of the single-sealed energy storage ring faces to one side far away from the ball body, the first positioning ring is positioned on one side far away from the ball body of the single-sealed energy storage ring, and a first limiting convex ring positioned on one side, close to the ball body, of the single-sealed energy storage ring is arranged on the outer periphery of the second inlet valve seat part;
the inlet valve seat and the end face matched with the ball body are provided with inlet sealing ring limiting grooves, sealing rings are embedded in the inlet sealing ring limiting grooves, and the sealing rings are in sealing fit with the spherical surface of the ball body.
The single-seal energy storage ring comprises an energy storage spring made of hairspring alloy or INCONEL alloy, a jacket made of modified PTFE (polytetrafluoroethylene) and wrapped with high-strength alloy wires serving as tendons and bones, and a T-shaped retaining ring made of modified PTFE and wrapped with high-strength alloy wires serving as tendons and bones, wherein an opening is formed in one side, away from the sphere, of the jacket, the energy storage spring is arranged in the opening and wrapped with the jacket to limit the position of the energy storage spring, the T-shaped retaining ring is arranged on one side, away from the sphere, of the jacket, and one end of a small area abuts against the energy storage spring.
The first positioning ring is provided with a plurality of first dismounting holes which are arranged at equal intervals and formed along the radial direction of the opening, the inlet valve seat is provided with a plurality of second dismounting holes which are arranged at equal intervals and formed along the radial direction of the opening, and the number of the first dismounting holes is equal to that of the second dismounting holes and the first dismounting holes are arranged in corresponding positions.
The outlet valve seat assembly comprises an outlet valve seat mounting ring and an outlet valve seat arranged on the inner periphery of the outlet valve seat mounting ring, a second external thread part is arranged on the outer periphery of the outlet valve seat mounting ring, and the second external thread part is in threaded fit with an internal thread part at one end of the valve body main pipe fitting;
the outlet valve seat comprises a first outlet valve seat part arranged on one side of the third convex ring part close to the ball body and a second outlet valve seat part arranged on one side of the fourth convex ring part close to the ball body;
a plurality of second spring limiting holes which are distributed in an annular mode at equal intervals are formed in the end face of one side, close to the ball body, of the third convex ring part, and a plurality of springs limited through the second spring limiting holes are arranged between the third convex ring part and the first outlet valve seat part;
a certain distance is arranged between the outer periphery of the second outlet valve seat part and the inner periphery of the third convex ring part to form a second sealed chamber, a double-sealed energy storage ring and a second positioning ring are arranged in the second sealed chamber, two ends of the double-sealed energy storage ring are sealed ends, the second positioning ring is positioned on one side, away from the ball body, of the double-sealed energy storage ring, and a second limiting convex ring is arranged on the outer periphery of the second outlet valve seat part and is positioned on one side, close to the ball body, of the double-sealed energy storage ring;
the outlet valve seat and the end face matched with the ball body are provided with outlet sealing ring limiting grooves, sealing rings are embedded in the outlet sealing ring limiting grooves, and the sealing rings are in sealing fit with the spherical surface of the ball body.
The double-seal energy storage ring comprises a jacket, wherein the jacket is made of rib and bone outer-wrapped modified PTFE, high-strength alloy wires are used as the rib and bone outer-wrapped modified PTFE, openings are formed in two ends of the jacket, T-shaped check ring caulking grooves are arranged in the openings, T-shaped check rings made of rib and bone outer-wrapped modified PTFE are embedded in the T-shaped check ring caulking grooves, the T-shaped check rings are separated in the openings to form two limiting cavities, energy storage springs made of hairspring alloy or INCONEL alloy are arranged in four limiting cavities at two ends, and the outer end portions of the T-shaped check rings are arranged in a protruding mode relative to the energy storage springs and the jacket.
The second locating ring is provided with a plurality of third dismounting holes which are arranged at equal intervals and formed along the radial direction of the opening, the outlet valve seat is provided with a plurality of fourth dismounting holes which are arranged at equal intervals and formed along the radial direction of the opening, and the number of the third dismounting holes is equal to that of the fourth dismounting holes and the third dismounting holes are arranged in corresponding positions.
The valve body main body pipe fitting is provided with an upper connecting hole, a connecting sleeve is arranged in the upper connecting hole, the upper end of the connecting sleeve is connected with a lengthened valve cover, the periphery of the connecting sleeve is provided with a connecting flange, the periphery of the lower end of the lengthened valve cover is provided with a lower connecting flange, and the lower connecting flange on the periphery of the lengthened valve cover, the connecting flange on the periphery of the connecting sleeve and the valve body main body pipe fitting are sequentially connected, superposed and fastened through a detachable fastener;
the ball valve is characterized in that an upper connecting flange is arranged on the periphery of the upper end of the lengthened valve cover, a driving mechanism is connected to the upper end of the lengthened valve cover, a driving valve rod is connected to the output end of the driving mechanism, and the driving valve rod sequentially penetrates through the lengthened valve cover and the connecting sleeve to be connected with a ball body.
The periphery of the lengthened valve cover is provided with a plurality of arc-moon-shaped heat dissipation grooves and is connected with a water dropping plate.
The utility model has the advantages as follows: the utility model discloses a valve body subassembly is three formula designs, during the use, the inlet end portion takeover with the outlet end portion takeover respectively with inlet pipe and outlet pipe welding, valve seat subassembly, spheroid etc. fix at valve body main part pipe fitting inner chamber, when needing the maintenance, dismantle the removable fastener of connecting inlet flange, valve body main part pipe fitting, outlet flange, can demolish ball valve major structure, inlet valve seat subassembly and outlet valve seat subassembly all adopt threaded connection to fix the both ends in valve body main part pipe fitting, consequently the utility model provides an ultra-low temperature ball valve can realize quick assembly disassembly, is favorable to online maintenance, improves the life of valve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced 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 obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an inlet connection flange (a), an inlet end connection pipe (b) and a valve body main pipe fitting (c) according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is an exploded schematic view of the inlet valve seat assembly;
FIG. 5 is a schematic view of the inlet seat mounting ring (a), the inlet seat assembly (b), and the first positioning ring (c);
FIG. 6 is an enlarged view of portion B of FIG. 1;
FIG. 7 is an exploded view of the outlet valve seat assembly;
FIG. 8 is a schematic view of the outlet seat mounting ring (a), the outlet seat assembly (b), and the second positioning ring (c);
FIG. 9 is an enlarged schematic view of portion C of FIG. 1;
FIG. 10 is an enlarged schematic view of portion D of FIG. 1;
fig. 11 is a schematic structural view of the lip-shaped seal ring limiting convex ring part matched with the lip-shaped seal ring;
FIG. 12 is an enlarged view of section E of FIG. 1;
in the figure, 1, a sphere; 2, driving the valve rod; 3, a driving mechanism; 401, inlet end connection pipe; 402, an inlet connecting flange; 403, a valve body tube; 404, outlet end connection; 405, an outlet connection flange; 406, an inlet gasket seal; 407, an outlet sealing gasket; 408, an internal threaded portion; 409, annular caulking groove; 410, four open loops; 411, an upper connection hole; 412, a valve body flange portion; 5, an inlet valve seat mounting ring; 501, a first external thread part; 502, a first collar portion; 503, a second collar portion; 504, a first spring retaining hole; 505, a fifth collar portion; 6, an inlet valve seat; 601, a first inlet valve seat portion; 602, a second inlet valve seat portion; 603, a first limit convex ring; 604, an inlet seal ring limit groove; 605, a second disassembly hole; 7, a spring; 8, a single sealing energy storage ring; 9, a first positioning ring; 901, a first dismounting hole; 10, a sealing ring; 11, an outlet valve seat mounting ring; 1101, a second external thread portion; 1102, a third collar portion; 1103, a fourth collar portion; 1104, a second spring retaining hole; 1105, a sixth collar portion; 12, an outlet valve seat; 1201, a first outlet valve seat portion; 1202, a second outlet valve seat portion; 1203, a second limit convex ring; 1205, a fourth dismounting hole; 13, double-sealing energy storage rings; 14, a second positioning ring; 1401, a third dismounting hole; 15, connecting sleeves; 16, lengthening the valve cover; 1601, arc moon shaped heat sink; 17, a water dropping plate; 18, supporting the valve stem; 19, a bottom cover; 20, a shaft sleeve; 21, lip-shaped sealing rings; 22, lip-shaped sealing ring limit convex ring part; 2201, guiding to a smooth oblique curved surface; 2202, limiting the smooth convex curved surface; 23, a T-shaped guide sleeve; 24, a filler cap; 25, a packing assembly; 26, packing pad.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be understood as limitations to the embodiments of the present invention, and the following embodiments do not describe any more.
The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the invention.
As shown in fig. 1, an on-line maintenance ultra-low temperature high performance ball valve comprises a valve body assembly, an inlet valve seat assembly, an outlet valve seat assembly, a ball body 1, a driving valve rod 2 and a driving mechanism 3;
the valve body assembly comprises an inlet end connecting pipe 401, an inlet connecting flange 402, a valve body main pipe 403, an outlet end connecting pipe 404 and an outlet connecting flange 405, wherein the inlet connecting flange 402 and the outlet connecting flange 405 are respectively connected and fastened with two ends of the valve body main pipe 403 through detachable fasteners, in the embodiment, the detachable fasteners specifically use studs and hexagon nuts, and other detachable fasteners can also be adopted;
one end of the inlet end connecting pipe 401 is located in the inlet connecting flange 402, and a projection is arranged on the outer periphery of the part of the inlet end connecting pipe 401 located in the inlet connecting flange 402, as shown in fig. 2 (a), a limit convex ring is arranged on the inner periphery of the inlet connecting flange 402, and the projection arranged on the inlet end connecting pipe 401 is located on one side, close to the valve body main pipe fitting 403, of the limit convex ring of the inlet connecting flange 402;
one end of the outlet end connecting pipe 404 is positioned in the outlet connecting flange 405, a convex block is arranged on the outer periphery of the part of the outlet end connecting pipe 404, which is positioned in the outlet connecting flange 405, the structure of the outlet connecting flange 405 is the same as that of the inlet connecting flange 402, a limiting convex ring is also arranged on the inner periphery of the outlet connecting flange, and the convex block arranged on the outlet end connecting pipe 404 is positioned on one side, close to the valve body main pipe fitting 403, of the limiting convex ring of the outlet connecting flange 405;
specifically, as shown in fig. 2 (b), the inlet end connection pipe 401 is provided with an annular caulking groove 409, the outlet end connection pipe 404 has the same structure as the inlet end connection pipe 401, and the outer periphery thereof is also provided with the annular caulking groove 409, as shown in fig. 3 and 6, the protrusion is formed by embedding four open rings 410 in the annular caulking groove 409;
as shown in fig. 2 (c), the valve body pipe 403 is similar to a circular tube, both ends of the inner circumference of the valve body pipe 403 are provided with internal thread portions 408, the inlet valve seat assembly and the outlet valve seat assembly are respectively fixed at both ends inside the valve body pipe 403 through threaded connection, the ball 1 is arranged between the inlet valve seat assembly and the outlet valve seat assembly, and the driving valve rod 2 passes through the valve body pipe 403 and extends into the inner cavity to be connected with the ball 1 to drive the ball 1 to rotate so as to open and close;
as shown in fig. 3, an inlet sealing gasket 406 is arranged between the inlet end connecting pipe 401 and the inlet valve seat assembly, and the inlet sealing gasket 406 is pressed by the inlet end connecting pipe 401 and the inlet valve seat assembly to form a sealing function under the fastening action of the detachable fastener;
as shown in fig. 6, an outlet sealing gasket 407 is arranged between the outlet end connecting tube 404 and the outlet valve seat assembly, and under the fastening action of the detachable fastener, the outlet sealing gasket 407 is pressed by the outlet end connecting tube 404 and the outlet valve seat assembly to form a sealing action;
the minimum distance between the assembly formed by connecting the inlet end connecting pipe 401 and the inlet connecting flange 402 and the assembly formed by connecting the outlet end connecting pipe 404 and the outlet connecting flange 405 is a, the maximum width of the assembly formed by connecting the valve body main pipe fitting 403, the inlet valve seat assembly and the outlet valve seat assembly is b, and a is larger than or equal to b.
During actual installation, an inlet connecting flange 402 and an outlet connecting flange 405 are respectively sleeved outside an inlet end connecting pipe 401 and an outlet end connecting pipe 404, the inlet end connecting pipe 401 and the outlet end connecting pipe 404 are respectively connected with an inlet pipeline and an outlet pipeline through welding, then a valve body main pipe 403 at least assembled with a ball body, an inlet valve seat assembly, an outlet valve seat assembly, an inlet sealing gasket 406 and an outlet sealing gasket 407 is placed between the inlet end connecting pipe 401 and the outlet end connecting pipe 404, and then the connection and fastening of the valve body main pipe 403 and the inlet end connecting pipe 401 and the outlet end connecting pipe 404 are completed through detachable fasteners, namely a stud and a hexagon nut used in the embodiment; when the sealing element needs to be repaired or replaced online, the detachable fasteners connecting the inlet connecting flange 402, the outlet connecting flange 405 and the valve body pipe fitting 403, i.e., the studs and the hexagon nuts used in this embodiment, are removed, so that the valve body pipe fitting 403 and the related components connected thereto can be directly pulled out from the pipeline as a whole, and then the maintenance operation is performed.
As shown in fig. 3 to 5, the inlet valve seat assembly includes an inlet valve seat mounting ring 5, an inlet valve seat 6 disposed on the inner periphery of the inlet valve seat mounting ring 5, the outer periphery of the inlet valve seat mounting ring 5 is provided with a first external thread portion 501, and the first external thread portion 501 is in threaded engagement with an internal thread portion 408 at one end of the valve body pipe member 403;
as shown in fig. 5 (a), the inlet valve seat mounting ring 5 is provided with a first protruding ring portion 502 on the inner circumference, the first protruding ring portion 502 is provided with a second protruding ring portion 503 on the inner circumference, and the inlet valve seat 6 includes a first inlet valve seat portion 601 disposed on the side of the first protruding ring portion 502 close to the ball 1 and a second inlet valve seat portion 602 disposed on the side of the second protruding ring portion 503 close to the ball 1;
a plurality of first spring limiting holes 504 which are distributed in an annular mode at equal intervals are formed in the end face, close to one side of the ball body 1, of the first convex ring part 502, and a plurality of springs 7 which are limited through the first spring limiting holes 504 are arranged between the first convex ring part 502 and the first inlet valve seat part 601;
a certain distance is arranged between the outer periphery of the second inlet valve seat portion 602 and the inner periphery of the first convex ring portion 502 to form a first sealed chamber, a single-sealed energy storage ring 8 and a first positioning ring 9 are arranged in the first sealed chamber, the sealed end of the single-sealed energy storage ring 8 faces to one side far away from the ball body 1, the first positioning ring 9 is positioned on one side far away from the ball body 1 of the single-sealed energy storage ring 8, and a first limiting convex ring 603 positioned on one side, close to the ball body 1, of the single-sealed energy storage ring 8 is arranged on the outer periphery of the second inlet valve seat portion 602;
the inlet valve seat 6 is provided with an inlet sealing ring limiting groove 604 on the end face matched with the ball body 1, a sealing ring 10 is embedded in the inlet sealing ring limiting groove 604, and the sealing ring 10 is in sealing fit with the spherical surface of the ball body 1.
As shown in fig. 3, the outer end of the inlet valve seat mounting ring 5 is provided with a limiting convex ring located in the inlet sealing gasket 406 to limit the inlet sealing gasket 406 and prevent the inlet sealing gasket 406 from deviating.
As shown in fig. 2 (c), the valve body main pipe 403 is provided with a valve body main convex ring part 412 between the internal thread parts 408 at both ends, as shown in fig. 3, sealing gasket limiting ring grooves are provided on the end faces at both ends of the valve body main convex ring part 412, a sealing gasket is provided between the end face of the inlet valve seat mounting ring 5 and the end face of one end of the valve body main convex ring part 412, and the sealing gasket is limited by the sealing gasket limiting ring groove. Meanwhile, the inlet valve seat mounting ring 5 is provided with a fifth convex ring part 505 located on the inner side of the convex ring part 412 of the valve body main body, a sealing element groove is formed between the periphery of the upper end part of the fifth convex ring part 505 and the convex ring part 412 of the valve body main body, a lip-shaped sealing ring 21 is arranged in the sealing element groove, and the sealing end of the lip-shaped sealing ring 21 is arranged towards the direction of the sphere 1, namely the right side direction in the drawing, so that the effect of preventing limiting is effectively achieved. The periphery of the upper end of the fifth convex ring part 505 is provided with a lip-shaped sealing ring limiting convex ring part 22, and the lip-shaped sealing ring limiting convex ring part 22 limits the lip-shaped sealing ring 21. Through the arrangement, the leakage of the low-temperature medium from the connecting part of the valve body main pipe 403 and the inlet valve seat mounting ring 5 can be effectively avoided.
The single-seal energy storage ring 8 comprises an energy storage spring made of a balance spring alloy or an INCONEL alloy, a jacket made of a modified PTFE (polytetrafluoroethylene) with tendons and bones wrapped by a high-strength alloy wire, and a T-shaped retaining ring made of a modified PTFE with tendons and bones wrapped by a high-strength alloy wire, wherein an opening is formed in one side, away from the ball body 1, of the jacket, the energy storage spring is arranged in the opening and wrapped by the jacket to limit the position of the energy storage spring, the T-shaped retaining ring is arranged on one side, away from the ball body 1, of the jacket, and one end of a small area abuts against the energy storage spring. The force of the T-shaped check ring is transmitted from one side with a large area to the other side with a small area to tightly prop against the energy storage spring, so that the energy storage spring is expanded in an interference manner, and high-efficiency sealing energy storage performance is achieved.
As shown in fig. 5 (c), the first positioning ring 9 is provided with a plurality of first dismounting holes 901 formed in a radial direction and arranged at equal intervals, as shown in fig. 5 (b), the inlet valve seat 6 is provided with a plurality of second dismounting holes 605 formed in a radial direction and arranged at equal intervals, and the number of the first dismounting holes 901 is equal to the number of the second dismounting holes 605 and the positions of the first dismounting holes 901 are arranged correspondingly.
The spring 7 in the inlet valve seat assembly can lead to the elastic property to decline after being used for a long time, consequently, need dismantle the inlet valve seat assembly and realize the replacement, adopt the long rod form to dismantle frock and insert second disassembly hole 605 and first disassembly hole 901, then slowly carry out the dismouting, make inlet valve seat 6, single sealed energy storage circle 8, first locating ring 9 withdraws from inlet valve seat installing ring 5 slowly together, prevent the wearing and tearing to single sealed energy storage circle 8, because high performance single sealed energy storage circle 8 preparation cost is high, if single sealed energy storage circle 8 damages, then the maintenance cost is too high, consequently, this embodiment can realize the harmless dismouting of single sealed energy storage circle 8, effectively reduce downstream user's maintenance cost.
As shown in fig. 6 to 8, the outlet valve seat assembly includes an outlet valve seat mounting ring 11, an outlet valve seat 12 disposed on the inner periphery of the outlet valve seat mounting ring 11, the outer periphery of the outlet valve seat mounting ring 11 is provided with a second external thread portion 1101, and the second external thread portion 1101 is in threaded engagement with an internal thread portion 408 at one end of a valve body tube 403;
as shown in fig. 8 (a), the outlet valve seat mounting ring 11 is provided with a third convex ring part 1102 on the inner periphery, the third convex ring part 1102 is provided with a fourth convex ring part 1103 on the inner periphery, and the outlet valve seat 12 comprises a first outlet valve seat portion 1201 arranged on the side of the third convex ring part 1102 close to the ball 1 and a second outlet valve seat portion 1202 arranged on the side of the fourth convex ring part 1103 close to the ball 1;
a plurality of second spring limiting holes 1104 which are distributed in an annular mode at equal intervals are formed in the end face, close to one side of the sphere 1, of the third convex ring part 1102, and a plurality of springs 7 limited by the second spring limiting holes 1104 are arranged between the third convex ring part 1102 and the first outlet valve seat part 1201;
a certain distance is arranged between the outer periphery of the second outlet valve seat part 1202 and the inner periphery of the third convex ring part 1102 to form a second sealed chamber, a double-sealed energy storage ring 13 and a second positioning ring 14 are arranged in the second sealed chamber, both ends of the double-sealed energy storage ring 13 are sealed ends, the second positioning ring 14 is positioned on one side, away from the ball body 1, of the double-sealed energy storage ring 13, and a second limiting convex ring 1203 positioned on one side, close to the ball body 1, of the double-sealed energy storage ring 13 is arranged on the outer periphery of the second outlet valve seat part 1202;
the outlet valve seat 12 is provided with an outlet sealing ring limiting groove on the end face matched with the ball body 1, a sealing ring 10 is embedded in the outlet sealing ring limiting groove, and the sealing ring 10 is matched with the ball body 1 in a spherical sealing mode.
As shown in fig. 6, the outer end of the outlet valve seat mounting ring 11 is provided with a limiting convex ring located in the outlet sealing gasket 407, so as to limit the outlet sealing gasket 407 and prevent the outlet sealing gasket 407 from deviating.
As shown in fig. 6, a sealing gasket is arranged between the end surface of the outlet valve seat mounting ring 11 and the end surface of the one end of the convex ring part 412 of the valve body main body, and the sealing gasket is limited by a sealing gasket limiting ring groove. Meanwhile, the outlet valve seat mounting ring 11 is provided with a sixth collar portion 1105 located inside the collar portion 412 of the valve body main body, a sealing member groove is arranged between the periphery of the upper end portion of the sixth collar portion 1105 and the collar portion 412 of the valve body main body, a lip-shaped sealing ring 21 is arranged in the sealing member groove, and the sealing end of the lip-shaped sealing ring 21 is arranged towards the direction of the ball body 1, namely the left side direction in the drawing, so that the effect of preventing limiting is effectively achieved. The periphery of the upper end part of the sixth convex ring part 1105 is provided with a lip-shaped sealing ring limiting convex ring part 22, and the lip-shaped sealing ring limiting convex ring part 22 limits the lip-shaped sealing ring 21. Through the arrangement, the leakage of the low-temperature medium from the joint of the valve body main pipe 403 and the outlet valve seat mounting ring 11 can be effectively avoided.
The double-seal energy storage ring 13 comprises a jacket made of rib and bone externally-coated modified PTFE, wherein high-strength alloy wires are used as the inner parts of the jacket, openings are formed in two ends of the jacket, T-shaped check ring caulking grooves are arranged in the openings, T-shaped check rings made of rib and bone externally-coated modified PTFE are embedded in the T-shaped check ring caulking grooves, the T-shaped check rings are separated in the openings to form two limiting cavities, energy storage springs made of hairspring alloy or INCONEL alloy are arranged in four limiting cavities at two ends of the T-shaped check ring, and the outer end parts of the T-shaped check rings are arranged in a protruding mode relative to the energy storage springs and the jacket.
As shown in fig. 8 (c), the second cage 14 is provided with a plurality of equally spaced third holes 1401 formed along the radial direction, and as shown in fig. 8 (d), the outlet valve seat 12 is provided with a plurality of equally spaced fourth holes 1205 formed along the radial direction, and the number of the third holes 1401 is equal to the number of the fourth holes 1205 and is arranged corresponding to the position of the third holes 1401. The spring 7 in the outlet valve seat component can cause the elastic performance to be reduced after being used for a long time, therefore, the outlet valve seat component needs to be disassembled to realize replacement, a long rod-shaped disassembling tool is adopted to be inserted into the fourth disassembling hole 1205 and the third disassembling hole 1401, then the disassembly and the assembly are carried out slowly, so that the outlet valve seat 12, the double-sealing energy storage ring 13 and the first positioning ring 9 are withdrawn slowly from the inlet valve seat mounting ring 5 together, the abrasion of the double-sealing energy storage ring 13 is prevented, the preparation cost of the high-performance double-sealing energy storage ring 13 is extremely high, if the double-sealing energy storage ring 13 is damaged, the maintenance cost is too high, therefore, the nondestructive disassembly and the assembly of the double-sealing energy storage ring 13 can be realized in the embodiment, and the maintenance cost of downstream users is effectively reduced.
As shown in fig. 2 (c), an upper connection hole 411 is formed in the valve body main pipe 403, as shown in fig. 9, a connection sleeve 15 is arranged in the upper connection hole 411, the upper end of the connection sleeve 15 is connected with a lengthened valve cover 16, a connection flange is arranged on the periphery of the connection sleeve 15, a lower connection flange is arranged on the periphery of the lower end of the lengthened valve cover 16, the lower connection flange on the periphery of the lengthened valve cover 16 and the connection flange on the periphery of the connection sleeve 15 are sequentially connected and overlapped with the valve body main pipe 403 and are connected and fastened through a detachable fastener;
the periphery of 16 upper ends of extension valve gap is equipped with flange, 16 upper ends of extension valve gap are connected with actuating mechanism 3, actuating mechanism 3 output is connected and is driven valve rod 2 and drive valve rod 2 and pass extension valve gap 16, adapter sleeve 15 connection spheroid 1 in proper order.
Be equipped with T shape seal chamber between valve body main part pipe fitting 403 and the adapter sleeve 15, be equipped with matched with T shape uide bushing 23 in the T shape seal chamber, the seal gasket between T shape uide bushing 23 upper end and the adapter sleeve 15, be equipped with lip seal circle 21 between T shape uide bushing 23 lower extreme and the valve body main part pipe fitting 403, the sealed end of lip seal circle 21 sets up towards the spheroid direction, the below direction in the figure promptly, sets up like this and effectively avoids low temperature medium to leak between valve body main part pipe fitting 403 and the adapter sleeve 15.
The periphery of the lower end of the connecting sleeve 15 is sleeved with a shaft sleeve 20, and the ball body 1 is sleeved outside the shaft sleeve 20.
As shown in fig. 10, a lower connection hole is formed in the valve body main pipe 403, a support valve rod 18 and a bottom cover 19 are arranged in the lower connection hole, the bottom cover 19 is fastened to the valve body main pipe 403 through a bolt, the support valve rod 18 is arranged on the bottom cover 19 and supported by the bottom cover 19, a shaft sleeve 20 is sleeved outside the support valve rod 18, and the ball 1 is sleeved outside the shaft sleeve 20. A sealing element groove is formed between the periphery of the upper end of the bottom cover 19 and the valve body main pipe fitting 403, a lip-shaped sealing ring 21 is arranged in the sealing element groove, and the sealing end of the lip-shaped sealing ring 21 faces the direction of the support valve rod 18, namely the upper end in the drawing, so that the limiting prevention effect is effectively achieved. The periphery of the upper end of the bottom cover 19 is provided with a lip-shaped sealing ring limiting convex ring part 22, and the lip-shaped sealing ring limiting convex ring part 22 limits the lip-shaped sealing ring 21.
In this embodiment, as shown in fig. 11, all the lip-shaped sealing ring limiting convex ring portions 22 provided in this embodiment, that is, the lip-shaped sealing ring limiting convex ring portions 22 provided in the valve body main pipe 403 and the bottom cover 19, have a guiding smooth inclined curved surface 2201 on one side for facilitating the insertion of the lip-shaped sealing ring 21 and a limiting smooth convex curved surface 2202 on the other side for preventing the lip-shaped sealing ring 21 from slipping out, and the lip-shaped sealing ring 21 can be taken out without damage by slowly moving along the limiting smooth convex curved surface 2202 under the action of a certain external force.
The periphery of the lengthened valve cover 16 is provided with a plurality of arc moon-shaped heat dissipation grooves 1601 which are connected with a water dropping plate 17. At present, in the technical field of ultra-low temperature valves, the valve cover is usually lengthened, and the heat dissipation area is increased by forming annular heat dissipation grooves or heat dissipation plates on the periphery of the lengthened valve cover, wherein the annular heat dissipation grooves formed on the periphery of the lengthened valve cover are usually annular grooves with rectangular cross sections, when a plurality of annular heat dissipation grooves with the above structure are formed on the periphery of the lengthened valve cover, the heat dissipation efficiency can be obviously improved, but the strength of the lengthened valve cover 16 is also obviously reduced, because the wall thickness of the part of the lengthened valve cover 16 provided with the annular heat dissipation grooves is obviously reduced, the lengthened valve cover is relatively easy to bend under the action of external force, if the wall thickness of the lengthened valve cover 16 is increased, the heat dissipation efficiency is affected, the arc-moon-shaped heat dissipation groove 1601 provided in the embodiment has the arc-moon-shaped cross section, that is a concave curved surface, although the wall thickness of the part of the lengthened valve cover 16 provided with the annular heat dissipation grooves is reduced, the concave curved surface is arranged to effectively improve the bending resistance of the lengthened valve cover 16, the strength of the overall elongated valve cover 16 is improved. The water dripping plate 17 is made of a plate, the plate is firstly leveled and is connected with the lengthened bracket by friction welding, so that the flatness and the performance of the water dripping plate are ensured.
As shown in fig. 12, the inner circumference of the upper end portion of the lengthened valve cap 16 is provided with a first groove, a second groove and a third groove which have successively reduced inner diameters from top to bottom, a packing cover 24, a packing component 25, a packing gasket 26 and a lip-shaped sealing ring 21 are sequentially arranged between the lengthened valve cover 16 and the driving valve rod 2 from top to bottom, the packing component 25 is arranged in the second groove, the packing cover 24 is T-shaped, the packing cover 24 with larger outer diameter is arranged in the first groove and is tightly connected with the inner wall of the first groove through screw threads, disposed in the second groove with a smaller outer diameter and the ends provide a downward squeezing action on the packing assembly 25, the packing gasket 26 is T-shaped, the packing gasket 26 with larger outer diameter is arranged in the second groove and supports the packing assembly 25, the outer diameter of the lip-shaped sealing ring is smaller, the lip-shaped sealing ring 21 is arranged in the third groove, and the sealing end of the lip-shaped sealing ring faces downwards. This effectively prevents the leakage of the cryogenic medium. The packing assembly 25 includes a plurality of V-shaped intermediate packing elements stacked one above the other and having a planar upper surface disposed above the intermediate packing and a planar lower surface disposed below the intermediate packing.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The online maintenance ultralow temperature high performance ball valve is characterized in that: comprises a valve body component, an inlet valve seat component, an outlet valve seat component, a ball body (1), a driving valve rod (2) and a driving mechanism (3);
the valve body assembly comprises an inlet end connecting pipe (401), an inlet connecting flange (402), a valve body main body pipe fitting (403), an outlet end connecting pipe (404) and an outlet connecting flange (405), wherein the inlet connecting flange (402) and the outlet connecting flange (405) are respectively connected and fastened with two ends of the valve body main body pipe fitting (403) through detachable fasteners;
one end of the inlet end connecting pipe (401) is positioned in the inlet connecting flange (402), a convex block is arranged on the outer periphery of the part of the inlet end connecting pipe (401) positioned in the inlet connecting flange (402), a limiting convex ring is arranged on the inner periphery of the inlet connecting flange (402), and the convex block arranged on the inlet end connecting pipe (401) is positioned on one side, close to the valve body main pipe fitting (403), of the limiting convex ring of the inlet connecting flange (402);
one end of the outlet end connecting pipe (404) is positioned in the outlet connecting flange (405), and a convex block is arranged on the outer periphery of the part of the outlet end connecting pipe (404) positioned in the outlet connecting flange (405), a limiting convex ring is arranged on the inner periphery of the outlet connecting flange (405), and the convex block arranged on the outlet end connecting pipe (404) is positioned on one side, close to the valve body main pipe fitting (403), of the limiting convex ring of the outlet connecting flange (405);
the two ends of the inner periphery of the valve body main pipe fitting (403) are respectively provided with an internal thread part (408), the inlet valve seat assembly and the outlet valve seat assembly are respectively fixed at the two ends in the valve body main pipe fitting (403) through threaded connection, the ball body (1) is arranged between the inlet valve seat assembly and the outlet valve seat assembly, and the driving valve rod (2) penetrates through the valve body main pipe fitting (403) to extend into an inner cavity to be connected with the ball body (1) to drive the ball body (1) to rotate so as to realize opening and closing;
an inlet sealing gasket (406) is arranged between the inlet end connecting pipe (401) and the inlet valve seat assembly, and under the fastening action of the detachable fastener, the inlet sealing gasket (406) is pressed by the inlet end connecting pipe (401) and the inlet valve seat assembly to form a sealing action;
an outlet sealing gasket (407) is arranged between the outlet end connecting pipe (404) and the outlet valve seat assembly, and under the fastening action of the detachable fastener, the outlet sealing gasket (407) is pressed by the outlet end connecting pipe (404) and the outlet valve seat assembly to form a sealing action;
the minimum distance between an assembly formed by connecting the inlet end connecting pipe (401) and the inlet connecting flange (402) and an assembly formed by connecting the outlet end connecting pipe (404) and the outlet connecting flange (405) is a, the maximum width of the assembly formed by connecting the valve body main pipe fitting (403), the inlet valve seat assembly and the outlet valve seat assembly is b, and a is larger than or equal to b.
2. The on-line service ultra-low temperature high performance ball valve of claim 1, wherein: the periphery of the inlet connecting flange (402) and the periphery of the outlet connecting flange (405) are both provided with annular caulking grooves (409), and the lug is formed by embedding four open rings (410) in the annular caulking grooves (409).
3. The on-line service ultra-low temperature high performance ball valve of claim 1, wherein: the inlet valve seat assembly comprises an inlet valve seat mounting ring (5) and an inlet valve seat (6) arranged on the inner periphery of the inlet valve seat mounting ring (5), a first external thread part (501) is arranged on the outer periphery of the inlet valve seat mounting ring (5), and the first external thread part (501) is in threaded fit with an internal thread part (408) at one end of a valve body main pipe fitting (403);
the inlet valve seat mounting ring (5) is internally provided with a first convex ring part (502), the first convex ring part (502) is internally provided with a second convex ring part (503), and the inlet valve seat (6) comprises a first inlet valve seat part (601) arranged on one side of the first convex ring part (502) close to the ball body (1) and a second inlet valve seat part (602) arranged on one side of the second convex ring part (503) close to the ball body (1);
a plurality of first spring limiting holes (504) which are distributed in an annular mode at equal intervals are formed in the end face of one side, close to the ball body (1), of the first convex ring part (502), and a plurality of springs (7) limited through the first spring limiting holes (504) are arranged between the first convex ring part (502) and the first inlet valve seat part (601);
a certain distance is arranged between the outer periphery of the second inlet valve seat part (602) and the inner periphery of the first convex ring part (502) to form a first sealing chamber, a single-sealing energy storage ring (8) and a first positioning ring (9) are arranged in the first sealing chamber, the sealing end of the single-sealing energy storage ring (8) faces to one side far away from the ball body (1), the first positioning ring (9) is positioned on one side, far away from the ball body (1), of the single-sealing energy storage ring (8), and a first limiting convex ring (603) positioned on one side, close to the ball body (1), of the single-sealing energy storage ring (8) is arranged on the outer periphery of the second inlet valve seat part (602);
import disk seat (6) and spheroid (1) complex terminal surface are equipped with import sealing washer spacing recess (604), the embedded sealing washer (10) that is equipped with of import sealing washer spacing recess (604), sealing washer (10) and spheroid (1) spherical surface sealing cooperation.
4. The on-line service ultra-low temperature high performance ball valve of claim 3, wherein: the single-seal energy storage ring (8) comprises an energy storage spring made of a balance spring alloy or an INCONEL alloy, a jacket made of a modified PTFE (polytetrafluoroethylene) with a high-strength alloy wire as a tendon and a T-shaped retaining ring made of a modified PTFE with a high-strength alloy wire as a tendon and a bone, an opening is formed in one side, away from the ball (1), of the jacket, the energy storage spring is arranged in the opening and wrapped by the jacket to limit the position of the energy storage spring, the T-shaped retaining ring is arranged on one side, away from the ball (1), of the jacket, and one end of a small area abuts against the energy storage spring.
5. The on-line service ultra-low temperature high performance ball valve of claim 4, wherein: the first positioning ring (9) is provided with a plurality of first dismounting holes (901) which are arranged at equal intervals and formed along the radial direction, the inlet valve seat (6) is provided with a plurality of second dismounting holes (605) which are arranged at equal intervals and formed along the radial direction, the number of the first dismounting holes (901) is equal to that of the second dismounting holes (605), and the first dismounting holes and the second dismounting holes are arranged in corresponding positions.
6. The on-line service ultra-low temperature high performance ball valve of claim 1, wherein: the outlet valve seat assembly comprises an outlet valve seat mounting ring (11) and an outlet valve seat (12) arranged on the inner periphery of the outlet valve seat mounting ring (11), wherein a second external thread part (1101) is arranged on the outer periphery of the outlet valve seat mounting ring (11), and the second external thread part (1101) is in threaded fit with an internal thread part (408) at one end of a valve body main pipe fitting (403);
a third convex ring part (1102) is arranged on the inner periphery of the outlet valve seat mounting ring (11), a fourth convex ring part (1103) is arranged on the inner periphery of the third convex ring part (1102), and the outlet valve seat (12) comprises a first outlet valve seat part (1201) arranged on one side, close to the ball body (1), of the third convex ring part (1102) and a second outlet valve seat part (1202) arranged on one side, close to the ball body (1), of the fourth convex ring part (1103);
a plurality of second spring limiting holes (1104) which are distributed in an annular mode at equal intervals are formed in the end face of one side, close to the ball body (1), of the third convex ring part (1102), and a plurality of springs (7) limited through the second spring limiting holes (1104) are arranged between the third convex ring part (1102) and the first outlet valve seat part (1201);
a certain distance is arranged between the outer periphery of the second outlet valve seat part (1202) and the inner periphery of the third convex ring part (1102) to form a second sealed chamber, a double-sealed energy storage ring (13) and a second positioning ring (14) are arranged in the second sealed chamber, both ends of the double-sealed energy storage ring (13) are sealed ends, the second positioning ring (14) is positioned on one side, far away from the sphere (1), of the double-sealed energy storage ring (13), and a second limiting convex ring (1203) positioned on one side, close to the sphere (1), of the double-sealed energy storage ring (13) is arranged on the outer periphery of the second outlet valve seat part (1202);
the outlet valve seat (12) and the end face matched with the ball body (1) are provided with outlet sealing ring limiting grooves, sealing rings (10) are embedded in the outlet sealing ring limiting grooves, and the sealing rings (10) are matched with the ball body (1) in a spherical sealing mode.
7. The on-line service ultra-low temperature high performance ball valve of claim 6, wherein: the double-seal energy storage ring (13) comprises a jacket made of rib and bone outer-coated modified PTFE, wherein high-strength alloy wires are used as the inner parts of the jacket, openings are formed in two ends of the jacket, T-shaped check ring caulking grooves are arranged in the openings, T-shaped check rings made of rib and bone outer-coated modified PTFE are embedded in the T-shaped check ring caulking grooves, the T-shaped check rings are separated in the openings to form two limiting cavities, energy storage springs made of hairspring alloy or INCONEL alloy are arranged in four limiting cavities at two ends of the T-shaped check ring, and the outer end parts of the T-shaped check rings are arranged in a protruding mode relative to the energy storage springs and the jacket.
8. The on-line service ultra-low temperature high performance ball valve of claim 7, wherein: the second positioning ring (14) is provided with a plurality of third dismounting holes (1401) which are arranged at equal intervals and formed along the radial direction, the outlet valve seat (12) is provided with a plurality of fourth dismounting holes (1205) which are arranged at equal intervals and formed along the radial direction, and the number of the third dismounting holes (1401) is equal to that of the fourth dismounting holes (1205) and the positions of the third dismounting holes are arranged correspondingly.
9. The on-line service ultra-low temperature high performance ball valve of claim 1, wherein: an upper connecting hole (411) is formed in the valve body main body pipe fitting (403), a connecting sleeve (15) is arranged in the upper connecting hole (411), the upper end of the connecting sleeve (15) is connected with a lengthened valve cover (16), a connecting flange is arranged on the periphery of the connecting sleeve (15), a lower connecting flange is arranged on the periphery of the lower end of the lengthened valve cover (16), the lower connecting flange on the periphery of the lengthened valve cover (16) and the connecting flange on the periphery of the connecting sleeve (15) are sequentially connected and overlapped with the valve body main body pipe fitting (403) and are connected and fastened through a detachable fastener;
extension valve gap (16) upper end periphery is equipped with flange, extension valve gap (16) upper end is connected with actuating mechanism (3), actuating mechanism (3) output is connected and is driven valve rod (2) and drive valve rod (2) and pass extension valve gap (16), adapter sleeve (15) connection spheroid (1) in proper order.
10. The on-line service ultra-low temperature high performance ball valve of claim 9, wherein: the periphery of the lengthened valve cover (16) is provided with a plurality of arc-moon-shaped heat dissipation grooves (1601) and is connected with a water dropping plate (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120755176.3U CN214662198U (en) | 2021-04-13 | 2021-04-13 | On-line maintenance ultra-low temperature high-performance ball valve |
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| CN202120755176.3U CN214662198U (en) | 2021-04-13 | 2021-04-13 | On-line maintenance ultra-low temperature high-performance ball valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023224834A1 (en) * | 2022-05-17 | 2023-11-23 | Dresser, Llc | Clamping a plug tip in a control valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023224834A1 (en) * | 2022-05-17 | 2023-11-23 | Dresser, Llc | Clamping a plug tip in a control valve |
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