CN109737210B - High-temperature molten salt pipeline valve - Google Patents
High-temperature molten salt pipeline valve Download PDFInfo
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- CN109737210B CN109737210B CN201910067186.5A CN201910067186A CN109737210B CN 109737210 B CN109737210 B CN 109737210B CN 201910067186 A CN201910067186 A CN 201910067186A CN 109737210 B CN109737210 B CN 109737210B
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Abstract
The invention discloses a high-temperature molten salt pipeline valve, which relates to the technical field of valves and comprises a support and a valve body, wherein valve rods are vertically and rotatably arranged in the support and the valve body, each valve rod comprises a lower section of valve rod connected with a valve core, and the lower section of valve rod is connected with an upper section of valve rod; an installation head is arranged on the lower segment valve rod, a clamping joint is arranged on the upper segment valve rod, and a thrust compensation gap is formed between the installation head and the clamping joint after clamping and matching. When the valve is used, the lower-section valve rod bears the radial thrust of a molten salt medium, and the thrust is upwards transmitted to the joint of the upper-section valve rod and the lower-section valve rod along the lower-section valve rod; because of the existence of the thrust compensation clearance between the mounting head and the clamping head, the thrust transmitted to the joint is little or not transmitted to the upper valve rod. Adopt multistage formula joint complex valve rod structure to the clearance that makes upper segment valve rod and support is very little, can effectively prevent the shifting up of fused salt medium, avoids the graphite packing of high temperature fused salt medium and packing box department to contact.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a high-temperature molten salt pipeline valve.
Background
Valves are accessories for pipelines for controlling opening and closing of pipelines, controlling flow direction, regulating and controlling parameters (temperature, pressure and flow) of conveying media. The valve can be used for controlling the flow of various fluid media such as air, water, steam, various corrosive media, slurry, oil products, liquid metal radioactive media and the like.
Molten salts, melts formed after melting of salts, e.g. melts of halides, nitrates, sulfates of alkali metals, alkaline earth metals. The molten salt is a salt which is in a solid state at standard temperature and standard brick atmospheric pressure and is in a liquid phase after the temperature is increased.
In the prior art, a valve generally includes a support and a valve body, a valve rod is rotatably disposed in the support and the valve body, the valve rod is connected with a valve core extending into a valve cavity, a valve seat used in cooperation with the valve core is disposed in the valve body, and a packing structure is disposed at a connection position of the support and the valve body. The packing sealing structure mainly comprises a packing cavity and a packing box (also called a packing box) arranged in the packing cavity, wherein the packing box is used as a sealing device of the valve rod part and plays a role in preventing media such as gas or liquid materials and the like from leaking. The stuffing box mainly comprises stuffing, a stuffing ring and a stuffing gland, and the commonly used stuffing materials are polytetrafluoroethylene stuffing and graphite stuffing.
When the valve uses, the high temperature high pressure fused salt of liquid phase can produce the radial thrust effect to the valve rod of valve, and the fused salt medium can follow the tiny clearance between support and the valve rod and enter into to the valve packing box, and the fused salt of high temperature makes the graphite packing gasification in the packing box, causes the packing box to reveal, and prior art exists the position that can improve.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a high temperature molten salt pipeline valve, in which a valve rod is configured as a rod member structure in multi-section clamping fit, a lower valve rod bears thrust, an upper valve rod does not bear thrust, and a gap between the upper valve rod and a support is small, so as to achieve the purpose of preventing a high temperature molten salt medium from contacting graphite packing in a packing box.
In order to achieve the purpose, the invention provides the following technical scheme: a high-temperature molten salt pipeline valve comprises a support and a valve body which is connected with the support and forms a cavity, wherein valve rods are vertically and rotatably arranged in the support and the valve body, the valve rods are connected with valve cores which extend into the cavity, the valve rods are arranged in a multi-section rod piece structure, each valve rod comprises a lower section valve rod connected with the valve cores, and the lower section valve rod is connected with an upper section valve rod which is rotatably matched with the support; the lower segment valve rod is provided with an installing head, the upper segment valve rod is provided with a clamping connector, the clamping connector is in clamping fit with the installing head and achieves transmission, and a thrust weakening gap is formed between the installing head and the clamping connector after the clamping fit.
By adopting the technical scheme, the upper-section valve rod and the lower-section valve rod are clamped and matched to form a complete valve rod structure, so that the lower-section valve rod bears the thrust of a molten salt medium in the use process of the valve, and the thrust is upwards transmitted to the joint of the upper-section valve rod and the lower-section valve rod along the lower-section valve rod; because of the existence of the thrust attenuation gap between the mounting head and the clamping head, the thrust transmitted to the joint is little or not transmitted to the upper valve rod. Adopt multistage formula joint complex valve rod structure, the hypomere valve rod bears the thrust effect, and the upper segment valve rod does not bear thrust effect basically or bears the thrust effect seldom to make the clearance of upper segment valve rod and support very little, can effectively prevent shifting up of fused salt medium, avoid high temperature fused salt medium to contact with the graphite packing of packing box department, and then reach the purpose that improves high temperature fused salt pipeline valve leakproofness.
The invention is further configured to: the lower segment valve rod and the valve body are connected with a sliding bearing; and the upper valve rod is of an integrated rod piece structure.
By adopting the technical scheme, the lower segment valve rod is connected with the valve body through the sliding bearing, and the sliding bearing works stably, reliably and noiselessly, so that the matching stability of the lower segment valve rod and the valve body is improved; and the sliding bearing bears the thrust of the medium acting on the lower segment valve rod.
The invention is further configured to: the lower-section valve rod and the valve body are connected with a sliding bearing, and the upper-section valve rod is of a multi-section rod piece structure; the upper segment valve rod is including a plurality of joint cooperations and realize driven connection valve rod, and two adjacent after the joint cooperation be formed with the transmission and weaken the clearance between the connection valve rod.
By adopting the technical scheme, the upper-section valve rod is set to be of a multi-section rod piece structure; when the thrust acting on the valve core is large, the thrust is transmitted to the joint along the lower segment valve rod and weakened through the thrust weakening gap, a small amount of thrust still acts on the connecting valve rod connected with the lower segment valve rod, and the thrust is further weakened through the transmission weakening gap between the two adjacent connecting valve rods. The multi-stage upper-section valve rod structure is beneficial to weakening the thrust action conducted to the connecting valve rod in a small quantity, and further achieves the purpose of further reducing the gap between the upper-section valve rod and the support.
The invention is further configured to: the mounting head and the clamping head are respectively provided with a cross-shaped recess and a cross-shaped bulge, and the cross-shaped bulges are embedded in the corresponding cross-shaped recesses in a clamping manner.
By adopting the technical scheme, the cross-shaped recess and the cross-shaped protrusion are matched to realize clamping fixation of the mounting head and the clamping head, namely the clamping fit of the lower-section valve rod and the upper-section valve rod is realized, and a gap formed by matching the cross-shaped recess and the cross-shaped protrusion is a thrust weakening gap; and the installation and fixation mode of the cross-shaped recess and the cross-shaped protrusion is convenient for installation personnel to fix the upper-section valve rod in a positioning way, and is favorable for improving the connection stability of the upper-section valve rod and the lower-section valve rod.
The invention is further configured to: the mounting head and the clamping head are respectively provided with a block-shaped groove and a block-shaped lug, and the block-shaped lug is embedded and clamped in the corresponding block-shaped groove.
By adopting the technical scheme, the block-shaped groove and the block-shaped convex block are matched to realize clamping and fixing of the mounting head and the clamping head, namely the clamping and matching of the lower-section valve rod and the upper-section valve rod is realized, and a gap formed by matching the block-shaped groove and the block-shaped convex block is a thrust weakening gap; and the mounting and fixing mode of the matched block-shaped convex block and the block-shaped groove is favorable for improving the strength of the connecting structure of the upper-section valve rod and the lower-section valve rod, and the distance between the thrust weakening gaps is increased simultaneously so as to adapt to the thrust action of a larger molten salt medium.
The invention is further configured to: be formed with sealed chamber between valve rod and the support, sealed chamber is located the packing box below, just last wedge and the lower wedge of superpose about being provided with in the sealed chamber, go up the excircle of wedge encircleing the valve rod, lower wedge sets up between the inner chamber wall and the last wedge of sealed chamber, just go up the wedge and extrude the setting each other with lower wedge.
Through adopting above-mentioned technical scheme, go up the wedge and cooperate the clearance between sealed valve rod and the support each other with lower wedge, go up the wedge promptly and extrude the clearance between shutoff support and the valve rod each other with lower wedge to separation high temperature fused salt gets into packing box department from the clearance between support and the valve rod, thereby reach the purpose that improves high temperature fused salt valve seal nature for the pipeline, and then reach the purpose that improves high temperature fused salt pipeline stability in use.
The invention is further configured to: an upper annular inclined plane is formed at the lower end of the upper wedge block, a lower annular inclined plane is formed at the upper end of the lower wedge block, and the upper annular inclined plane and the lower annular inclined plane are in inclined plane abutting connection.
Through adopting above-mentioned technical scheme, going up and being inclined plane butt cooperation structure between the voussoir down, going up the voussoir and combining inseparable with lower voussoir is favorable to improving the leakproofness between valve rod and the support.
The invention is further configured to: the valve rod, the upper wedge block and the lower wedge block are elastically abutted.
By adopting the technical scheme, the upper wedge block and the lower wedge block are in an elastic extrusion matching structure, and the upper wedge block and the lower wedge block are combined more tightly, so that the sealing property between the valve rod and the support is further improved; compared with a rigid extrusion arrangement mode, the arrangement mode of elastic extrusion is beneficial to improving the compensation performance and the sealing performance of the mechanical sealing structure. The upper wedge block and the valve rod are in an elastic extrusion matching structure, and the upper wedge block is combined with the valve rod more tightly, so that the sealing property between the valve rod and the support is further improved; and compared with a rigid extrusion arrangement mode, the arrangement mode of elastic extrusion is beneficial to improving the smoothness of the rotating motion of the valve rod.
The invention is further configured to: the top end and the bottom end of the sealing cavity are respectively provided with an elastic part and a backing ring, the backing rings are in threaded connection with the sealing cavity, and the elastic parts are used for driving the upper wedge block and the lower wedge block to be fully combined downwards; the elastic piece is matched with the backing ring to fix the upper wedge block and the lower wedge block.
Through adopting above-mentioned technical scheme, the elastic component cooperatees with the backing ring and accomplishes the installation of going up voussoir and lower voussoir fixed to drive goes up voussoir and lower voussoir elastic extrusion fit, compares in last voussoir and lower wedge rigid extrusion's fitting mode, and the former is favorable to improving the compactness and the accuracy of going up voussoir and lower wedge extrusion fit.
In conclusion, the invention has the following beneficial effects:
one is as follows: the valve rod structure in multi-section clamping fit is adopted and matched with a thrust weakening gap at the joint of the lower-section valve rod and the upper-section valve rod, the lower-section valve rod bears the thrust effect, and the upper-section valve rod basically does not bear or hardly bears the thrust effect, so that the gap between the upper-section valve rod and the bracket is small, the molten salt medium can be effectively prevented from moving upwards, the high-temperature molten salt medium is prevented from contacting with the graphite filler at the filler box, and the aim of improving the sealing property of the high-temperature molten salt pipeline valve is fulfilled;
the second step is as follows: the upper wedge block and the lower wedge block are matched with each other to seal a gap between the valve rod and the support so as to prevent high-temperature molten salt from entering a stuffing box from the gap between the support and the valve rod, so that the aim of improving the sealing property of the valve for the high-temperature molten salt pipeline is fulfilled;
and thirdly: the user can be according to operating condition or actual manufacturing condition, selects the upper segment valve rod that uses the integral type or selects the upper segment valve rod that uses multistage formula structure to can select the protruding cooperation mounting structure who describes sunkenly with the cross of cross form according to actual demand, perhaps select the cooperation mounting structure of cubic lug and cubic recess, have good practicality and suitability.
Drawings
FIG. 1 is a schematic cross-sectional view of a high temperature molten salt conduit valve;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1 when the upper valve stem is provided as a one-piece construction;
fig. 3 is a partially enlarged schematic view mainly showing a connection structure for connecting valve rods when the upper valve rod is provided in a multi-stage structure;
FIG. 4 is an exploded view of the structure of the cross-shaped protrusion and the cross-shaped recess;
fig. 5 is an exploded view mainly showing the structure of the block bump and the block groove.
Reference numerals: 1. a support; 2. a valve body; 3. a chamber; 4. a valve stem; 41. an upper segment valve stem; 411. a clamping head; 411-A, cross-shaped protrusions; 411-B, bulk bumps; 42. a lower segment valve stem; 421. a mounting head; 421-A, cross-shaped recess; 421-B, block-shaped groove; 5. a valve core; 6. a stuffing box; 7. a mechanical seal structure; 71. an upper wedge block; 711. an inner annular bevel; 712. an upper annular bevel; 72. a lower wedge block; 721. a lower annular bevel; 73. an elastic member; 74. a backing ring; 75. a gasket; 8. sealing the cavity; 81. installing a chamber; 82. a conditioning chamber; 9. a valve rod is connected.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
combine fig. 1 and fig. 2 to show, a high temperature fused salt pipeline valve, including support 1 and install the valve body 2 on support 1, and be formed with cavity 3 in the valve body 2, vertical rotation is provided with valve rod 4 in support 1 and the valve body 2, and valve rod 4 is connected with the case 5 that stretches into to cavity 3. In the process of using the valve, the high-temperature liquid-phase molten salt medium can generate a thrust action applied to the valve rod 4 along the flow direction of the medium, and a micro gap is generated between the valve rod 4 and the support 1 under the thrust action; and the high-temperature liquid-phase molten salt medium can enter the stuffing box 6 along a tiny gap between the valve rod 4 and the support 1, and is in contact with the graphite stuffing in the stuffing box 6 to gasify the graphite stuffing, so that the leakage of the stuffing box 6 is caused. Therefore, in the invention, the valve rod 4 is set to be a multi-section rod piece structure, and the mechanical sealing structure 7 is arranged between the valve rod 4 and the bracket 1, namely, the two modes are matched to achieve the purposes of preventing the high-temperature liquid-phase molten salt medium from moving upwards and avoiding the high-temperature liquid-phase molten salt medium from contacting with the graphite packing at the packing box 6.
In this embodiment, the valve rod 4 is provided as a two-segment rod structure, and includes a lower segment valve rod 42 connected to the valve core 5 and an upper segment valve rod 41 connected to the lower segment valve rod 42, the upper segment valve rod 41 is rotatably fitted to the bracket 1, and the lower segment valve rod 42 is connected to the valve body 2 through a sliding bearing. The upper end of the lower valve rod 42 is formed with a mounting head 421, the lower end of the upper valve rod 41 is formed with a clamping joint 411, and the clamping joint 411 of the upper valve rod 41 is clamped and matched with the mounting head 421 of the lower valve rod 42 to fix and realize the transmission action of the valve rod 4. A thrust weakening gap is formed between the mounting head 421 and the clamping head 411 after clamping and matching, and when the valve is in use, the lower-section valve rod 42 bears the thrust of a molten salt medium, and the thrust is upwards transmitted to the connection part of the upper-section valve rod 41 and the lower-section valve rod 42 along the lower-section valve rod 42; because of the existence of the thrust attenuation gap between the mounting head 421 and the bayonet 411, the thrust transmitted to the joint is transmitted to little or no upper stage valve stem 41. The two-section type clamping-matched valve rod 4 structure is adopted, the lower section valve rod 42 bears the thrust action, and the upper section valve rod 41 basically does not bear or bears the thrust action less, so that the gap between the upper section valve rod 41 and the support 1 is small, and the molten salt medium can be effectively prevented from moving upwards to contact with the graphite packing at the position of the packing box 6.
Referring to fig. 4, the upper valve rod 41 and the lower valve rod 42 realize a first engagement manner of transmission: the mounting head 421 is formed with a cross recess 421-a, the bayonet 411 is extended to form a cross protrusion 411-a, the cross recess 421-a and the cross protrusion 411-a are engaged, locked and matched, and a gap formed by the engagement between the cross recess 421-a and the cross protrusion 411-a is a thrust weakening gap. The cross-shaped recess 421-a and the cross-shaped protrusion 411-a are fixed in a matching manner, so that an installer can fix the upper-section valve rod 41 conveniently, and the connection stability of the upper-section valve rod 41 and the lower-section valve rod 42 can be improved.
Referring to fig. 5, the second engagement manner of the upper valve rod 41 and the lower valve rod 42 realizes transmission is as follows: the mounting head 421 is formed with a block-shaped recess 421-B, the locking joint 411 is extended to form a block-shaped projection 411-B, the block-shaped recess and the block-shaped projection 411-B are engaged, locked and matched, and a gap formed by the block-shaped recess 421-B and the block-shaped projection 411-B is a thrust weakening gap. The installation and fixing mode of the block-shaped projection 411-B and the block-shaped groove 421-B is favorable for improving the strength of the connection structure of the upper-section valve rod 41 and the lower-section valve rod 42, and simultaneously, the distance of the thrust weakening gap is increased so as to adapt to the thrust action of a larger molten salt medium.
As shown in fig. 1 and 2, a sealing cavity 8 is formed between the valve rod 4 and the bracket 1, the mechanical sealing structure 7 is embedded in the sealing cavity 8, and the mechanical sealing structure 7 includes an upper wedge 71 and a lower wedge 72 which are stacked up and down. The upper wedge block 71 surrounds and embraces the outer circle of the valve rod 4, the lower wedge block 72 is arranged between the inner cavity wall of the sealing cavity 8 and the upper wedge block 71, and the upper wedge block 71 and the lower wedge block 72 are elastically extruded mutually so as to prevent high-temperature molten salt from entering the valve stuffing box 6 from a gap between the valve rod 4 and the support 1, thereby achieving the purpose of improving the sealing performance of the valve for the high-temperature molten salt pipeline.
The upper wedge 71 and the lower wedge 72 are both arranged to be annular structures which are coaxial with the valve rod 4, the annular surface of the upper wedge 71 which is in sleeved contact with the valve rod 4 is arranged to be an inner annular inclined surface 711, the annular surface of the lower end of the upper wedge 71 which is elastically abutted with the lower wedge 72 is arranged to be an upper annular inclined surface 712, and the annular surface of the upper end of the lower wedge 72 which is elastically abutted with the upper wedge 71 is arranged to be a lower annular inclined surface 721; the inner annular inclined surface 711, the upper annular inclined surface 712, and the lower annular inclined surface 721 are all disposed to be inclined toward the valve stem 4. When the upper wedge 71 is combined with the lower wedge 72 and sleeved outside the valve rod 4, the lower wedge 72 is coaxially sleeved at the lower end of the upper wedge 71, and the upper annular inclined surface 712 is elastically abutted with the lower annular inclined surface 721; the upper wedge 71 is coaxially sleeved outside the outer circle of the valve rod 4, and the inner annular inclined surface 711 elastically abuts against the outer circle of the valve rod 4.
When an installer presses and installs the upper wedge 71 and the lower wedge 72, the contact part of the upper annular inclined surface 712 and the lower annular inclined surface 721 is elastically deformed and completely attached, and the non-contact part of the upper annular inclined surface 712 and the lower annular inclined surface 721 is still kept in a separated state; and the inner annular inclined plane 711 is elastically deformed under the action of elastic extrusion force and completely attached to the outer circle of the valve rod 4, so that the aim of further improving the combination sealing performance of the upper wedge 71 and the lower wedge 72 is fulfilled.
In order to facilitate installation and fixation of the upper wedge 71 and the lower wedge 72 by an installer, the upper portion of the sealing cavity 8 is provided with an elastic member 73 (the elastic member 73 may be a spring, an elastic pad, or the like, and is provided with a butterfly spring in this embodiment), and a gasket 75 is disposed at a lower opening of the sealing cavity 8, that is, the gasket 75 is sandwiched between the bracket 1 and the valve body 2. The sealing cavity 8 is set to be a multi-section type cavity structure, the sealing cavity 8 comprises a mounting cavity 81 and an adjusting cavity 82 which are coaxially arranged from top to bottom, the elastic piece 73 and the upper wedge block 71 are integrally arranged in the mounting cavity 81, most of the upper end of the lower wedge block 72 is positioned in the mounting cavity 81, and a small part of the lower end of the lower wedge block 72 is positioned in the adjusting cavity 82; and a backing ring 74 is coaxially arranged in the adjusting chamber 82, the backing ring 74 is fixedly connected with the adjusting chamber 82 through threads, namely, the elastic piece 73 and the backing ring 74 are matched to install and fix the upper wedge block 71 and the lower wedge block 72.
This embodiment is further described below in connection with the transmission of the thrust action:
in the process of using the valve, the high-temperature liquid-phase molten salt medium can generate a radial thrust action on the valve core 5, the radial thrust action is transmitted to the joint of the mounting head 421 and the clamping head 411 along the lower valve rod 42, and the thrust action does not generate an acting force (or only generates a tiny acting force) on the upper valve rod 41 under the weakening action of the thrust weakening gap, so that the gap between the upper valve rod 41 and the support 1 is very small, and the molten salt medium can be effectively prevented from moving upwards to the packing box 6.
The present embodiment is further described below in connection with the installation of a mechanical seal:
an installer sequentially installs the elastic piece 73, the upper wedge 71, the lower wedge 72 and the backing ring 74 into the sealing cavity 8 from top to bottom, namely the upper wedge 71 and the lower wedge 72 are installed and fixed in the sealing cavity 8 under the cooperation of the elastic piece 73 and the backing ring 74 and realize elastic abutting and matching; in the installation process, the inner annular inclined surface 711 of the upper wedge 71 is elastically deformed under the action of elastic extrusion force to be attached to the outer circle of the valve rod 4, and the upper annular inclined surface 712 of the upper wedge 71 and the lower annular inclined surface 721 of the lower wedge 72 are elastically deformed under the action of elastic extrusion force to be attached to each other.
Example two:
referring to fig. 1 and 3, a high-temperature molten salt pipeline valve differs from the first embodiment in that the upper-section valve rod 41 is provided with a multi-section rod structure (in this embodiment, a two-section upper-section valve rod 41). The upper-section valve rod 41 comprises a plurality of connecting valve rods 9 which are in clamping fit and realize transmission (the connecting position of the connecting valve rod 9 is positioned between the sliding bearing and the mechanical sealing structure 7), and a transmission weakening gap is formed between two adjacent connecting valve rods 9 after the clamping fit; when the radial thrust acting on the valve core 5 is larger, the thrust is transmitted to the joint along the lower valve rod 42 and weakened through the thrust weakening gap, a small amount of thrust still acts on the connecting valve rod 9 connected with the lower valve rod 42, and the small amount of thrust acts on the connecting valve rod 9 through the transmission weakening gap of the connecting valve rod 9 and is further weakened until no thrust acts on the connecting valve rod 9 close to the upper end of the support 1. The multi-section upper valve rod 41 is beneficial to further weakening the thrust action transmitted to the connecting valve rod 9 by a small amount, and further the purpose of further reducing the gap between the upper valve rod 41 and the bracket 1 is achieved.
As shown in fig. 4 and 5, the connection between the mounting head 421 and the clamping head 411 may be adopted between two adjacent connection valve rods 9 of the upper valve rod 41, that is, the connection between the cross recess 421-a and the cross protrusion 411-a is selected to be matched with each other, or the connection between the block recess 421-B and the block protrusion 411-B is selected to be matched with each other to form a transmission weakening gap.
This embodiment is further described below in connection with the transmission of the thrust action:
in the process of using the valve, the high-temperature liquid-phase molten salt medium can generate a thrust action on the valve core 5, the thrust action is transmitted to the joint of the mounting head 421 and the clamping head 411 along the lower valve rod 42, and the thrust action can not generate an acting force (or only generates a tiny acting force) on the upper valve rod 41 under the weakening action of the thrust weakening gap. When the thrust acting on the valve core 5 is large, the thrust is transmitted to the joint along the lower valve rod 42 and weakened through the thrust weakening gap, a small amount of thrust still acts on the connecting valve rod 9 connected with the lower valve rod 42, the action of the small amount of thrust is further weakened through the transmission weakening gap between the connecting valve rods 9 until no thrust acts on the connecting valve rod 9 close to the upper end of the support 1, namely no thrust acts on the upper valve rod 41, the gap between the upper valve rod 41 and the support 1 is small, and the molten salt medium can be effectively prevented from moving upwards to the stuffing box 6.
The present embodiment is further described below in connection with the installation of a mechanical seal:
an installer sequentially installs the elastic piece 73, the upper wedge 71, the lower wedge 72 and the backing ring 74 into the sealing cavity 8 from top to bottom, namely the upper wedge 71 and the lower wedge 72 are installed and fixed in the sealing cavity 8 under the cooperation of the elastic piece 73 and the backing ring 74 and realize elastic abutting and matching; in the installation process, the inner annular inclined surface 711 of the upper wedge 71 is elastically deformed under the action of elastic extrusion force to be attached to the outer circle of the valve rod 4, and the upper annular inclined surface 712 of the upper wedge 71 and the lower annular inclined surface 721 of the lower wedge 72 are elastically deformed under the action of elastic extrusion force to be attached to each other.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a high temperature fused salt pipeline valve, is connected and forms valve body (2) of cavity (3) including support (1) and with support (1), just vertical rotation is provided with valve rod (4) in support (1) and valve body (2), valve rod (4) are connected with and stretch into case (5) to in cavity (3), its characterized in that: the valve rod (4) is arranged to be of a multi-section rod piece structure, the valve rod (4) comprises a lower section valve rod (42) connected with the valve core (5), and the lower section valve rod (42) is connected with an upper section valve rod (41) which is in running fit with the support (1); a mounting head (421) is arranged on the lower section valve rod (42), a clamping joint (411) is arranged on the upper section valve rod (41), the clamping joint (411) is in clamping fit with the mounting head (421) to realize transmission, and a thrust weakening gap is formed between the mounting head (421) and the clamping joint (411) after the clamping fit; a sealing cavity (8) is formed between the valve rod (4) and the support (1), the sealing cavity (8) is located below the stuffing box (6), an upper wedge block (71) and a lower wedge block (72) which are overlapped up and down are arranged in the sealing cavity (8), the upper wedge block (71) encircles the excircle of the valve rod (4), the lower wedge block (72) is arranged between the wall of the inner cavity of the sealing cavity (8) and the upper wedge block (71), and the upper wedge block (71) and the lower wedge block (72) are arranged in a mutual extrusion mode; the upper wedge block (71) and the lower wedge block (72) are both arranged to be annular structures which are coaxial with the valve rod (4), an annular surface, which is in sleeved contact with the valve rod (4), of the upper wedge block (71) is arranged to be an inner annular inclined surface (711), an upper annular inclined surface (712) is formed at the lower end of the upper wedge block (71), a lower annular inclined surface (721) is formed at the upper end of the lower wedge block (72), and the upper annular inclined surface (712) and the lower annular inclined surface (721) are arranged in an inclined surface abutting mode; the valve rod (4), the upper wedge block (71) and the lower wedge block (72) are elastically abutted, and the inner annular inclined surface (711) is elastically abutted with the outer circle of the valve rod (4).
2. A high temperature molten salt conduit valve as claimed in claim 1, wherein: the lower segment valve rod (42) and the valve body (2) are connected with a sliding bearing; and the upper valve rod (41) is arranged into an integrated rod piece structure.
3. A high temperature molten salt conduit valve as claimed in claim 1, wherein: the lower section valve rod (42) and the valve body (2) are connected with a sliding bearing, and the upper section valve rod (41) is set to be of a multi-section rod piece structure; the upper segment valve rod (41) is matched with and realizes the driven connecting valve rod (9) including a plurality of joints, and two adjacent after the joint is matched with the connecting valve rod (9) are formed with the transmission weakening gap.
4. A high temperature molten salt conduit valve as claimed in any one of claims 1 to 3, wherein: the mounting head (421) and the clamping head (411) are respectively provided with a cross-shaped recess (421-A) and a cross-shaped protrusion (411-A), and the cross-shaped protrusion (411-A) is embedded in the corresponding cross-shaped recess (421-A).
5. A high temperature molten salt conduit valve as claimed in any one of claims 1 to 3, wherein: the mounting head (421) and the clamping head (411) are respectively provided with a block-shaped groove (421-B) and a block-shaped bump (411-B), and the block-shaped bump (411-B) is embedded and clamped in the corresponding block-shaped groove (421-B).
6. A high temperature molten salt conduit valve as claimed in claim 1, wherein: the top end and the bottom end of the sealing cavity (8) are respectively provided with an elastic piece (73) and a backing ring (74), the backing ring (74) is in threaded connection with the sealing cavity (8), and the elastic piece (73) is used for driving the upper wedge block (71) and the lower wedge block (72) to be fully combined; the elastic piece (73) is matched with the backing ring (74) to install and fix the upper wedge block (71) and the lower wedge block (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910067186.5A CN109737210B (en) | 2019-01-24 | 2019-01-24 | High-temperature molten salt pipeline valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910067186.5A CN109737210B (en) | 2019-01-24 | 2019-01-24 | High-temperature molten salt pipeline valve |
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| Publication Number | Publication Date |
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| CN109737210A CN109737210A (en) | 2019-05-10 |
| CN109737210B true CN109737210B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910067186.5A Active CN109737210B (en) | 2019-01-24 | 2019-01-24 | High-temperature molten salt pipeline valve |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10238647A (en) * | 1997-02-27 | 1998-09-08 | Citizen Watch Co Ltd | Electromagnetic exhaust valve |
| CN200943734Y (en) * | 2006-09-06 | 2007-09-05 | 赵紫光 | Eccentric hemisphere type three-way master control valve for melted salt |
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| JP2012067812A (en) * | 2010-09-22 | 2012-04-05 | Keihin Corp | Connecting spring and passage switching valve |
| CN203189867U (en) * | 2013-04-18 | 2013-09-11 | 江苏神通阀门股份有限公司 | Valve rod |
| CN207080517U (en) * | 2017-08-17 | 2018-03-09 | 上海飞龙新能源汽车部件有限公司 | A kind of ball valve power transmission shaft with spline |
| CN207701910U (en) * | 2017-09-15 | 2018-08-07 | 深圳市水务（集团）有限公司梅林水厂 | A kind of additional sealing device of stand alone type of adjustable butterfly valve |
| CN108547950A (en) * | 2018-01-01 | 2018-09-18 | 保集团有限公司 | The bar of triangular loop seals |
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| JPH10238647A (en) * | 1997-02-27 | 1998-09-08 | Citizen Watch Co Ltd | Electromagnetic exhaust valve |
| CN200943734Y (en) * | 2006-09-06 | 2007-09-05 | 赵紫光 | Eccentric hemisphere type three-way master control valve for melted salt |
| CN206860895U (en) * | 2017-06-26 | 2018-01-09 | 浙江精氟特阀门有限公司 | Automatic compensation sealing zero leakage fluorine lining butterfly valve |
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| CN109737210A (en) | 2019-05-10 |
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