CN214889075U - Redundant check valve of thick liquid - Google Patents
Redundant check valve of thick liquid Download PDFInfo
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- CN214889075U CN214889075U CN202022410022.9U CN202022410022U CN214889075U CN 214889075 U CN214889075 U CN 214889075U CN 202022410022 U CN202022410022 U CN 202022410022U CN 214889075 U CN214889075 U CN 214889075U
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Abstract
The technical scheme of the utility model discloses a slurry redundancy check valve, which comprises a main valve body formed by splicing a first high-temperature heat tracing jacket and a second high-temperature heat tracing jacket; a medium flow passage and a valve cavity are formed in the main valve body in a crossed and communicated manner; the first high-temperature heat tracing jacket is provided with a main valve core assembly, and a valve core of the main valve core assembly is inserted into the valve cavity; the second high-temperature heat tracing jacket is provided with an auxiliary valve core assembly, and a valve core of the auxiliary valve core assembly is inserted into the valve cavity; a heating medium inlet flange and a first heating medium outlet flange are arranged on the first high-temperature heat tracing jacket; a second heating medium outlet flange is arranged on the second high-temperature heat tracing jacket; and when the valve core of the main valve core assembly is butted with the valve core of the auxiliary valve core assembly, the medium flow passage is blocked. The utility model discloses a set up heat medium access & exit flange, the main valve body adopts high-temperature steam heat tracing to press from both sides the cover design, all lets in high-temperature steam between valve body outer wall, damping pipe inner chamber and the packing box and carries out the companion's heat, and balanced valve body inside and outside wall temperature improves valve body thermodynamic performance.
Description
Technical Field
The utility model belongs to the technical field of the check valve technique and specifically relates to a redundant check valve of thick liquid is related to.
Background
The existing slurry redundant check valve generally comprises a main valve body, a main valve core assembly, an auxiliary valve core, a valve cover, a support, a packing seal, a high-temperature heat tracing jacket, a positive hand wheel and an auxiliary hand wheel. The purpose of installing the check valve at the outlet of the pump is mainly to prevent the backflow of fluid with pressure in the outlet pipeline caused by sudden jump and stop of the pump and the like, so that the impeller of the pump is damaged or the cap is loosened, and the check valve is installed at a place which does not allow the fluid to flow back technically and has larger flow or higher pressure at the outlet of the pump. Because the concentration of the slurry medium is too high and the fluidity is not good, the valve clack of the traditional check valve structure is easy to clamp, is insensitive to opening and closing and is not easy to reset, and the normal circulation of the slurry medium is influenced.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem mentioned above, the utility model discloses technical scheme provides a redundant check valve of thick liquid, wherein, include:
the main valve body is formed by splicing a first high-temperature heat tracing jacket and a second high-temperature heat tracing jacket;
a medium flow passage and a valve cavity are formed in the main valve body in a crossed and communicated manner;
the first high-temperature heat tracing jacket is provided with a main valve core assembly, and a valve core of the main valve core assembly is inserted into the valve cavity;
an auxiliary valve core assembly is installed on the second high-temperature heat tracing jacket, and a valve core of the auxiliary valve core assembly is inserted into the valve cavity;
a heating medium inlet flange and a first heating medium outlet flange are mounted on the first high-temperature heat tracing jacket;
a second heating medium outlet flange is arranged on the second high-temperature heat tracing jacket;
and when the valve core of the main valve core assembly is butted with the valve core of the auxiliary valve core assembly, the medium flow passage is blocked.
Optionally, the main valve core assembly includes a main valve housing connected to a port of the valve cavity located on the first high-temperature heat tracing jacket, a main valve rod installed in the main valve housing, a main hand wheel connected to the main valve rod screw, a damping tube located in the valve cavity and fixed to an end of the valve rod, and a spring installed inside the damping tube and sleeved outside the main valve rod.
Optionally, the auxiliary valve core assembly comprises an auxiliary valve casing connected with a port of the valve cavity on the second high-temperature heat tracing jacket, an auxiliary valve rod installed in the auxiliary valve casing, and an auxiliary hand wheel connected with the auxiliary valve rod screw rod, wherein the auxiliary valve rod is coincident with the axis of the main valve rod, and the auxiliary valve rod blocks the medium flow channel when being in butt joint with the damping pipe.
Optionally, the surface of the damping tube facing the auxiliary valve rod is spherical, the surface of the auxiliary valve rod facing the damping tube is a concave spherical surface, and the auxiliary valve rod is in butt joint with the damping tube through the spherical surface and the concave spherical surface.
Optionally, the damping pipe is installed in interference fit with the inner wall of the valve cavity, and the auxiliary valve rod is installed in clearance fit with the inner wall of the valve cavity.
Optionally, the damping tube is a rotary corrugated damping tube with an outer surface having a continuous U-shaped groove structure.
Optionally, both ends of the spring abut against the top and bottom inside the damper tube, respectively.
Optionally, the heat medium inlet flange, the first heat medium outlet flange and the second heat medium outlet flange are in communication with a passage in the main valve body; the main valve body is internally communicated with the first heat medium outlet flange and the second heat medium outlet flange and is provided with a stuffing box, the main valve body is internally positioned in the damping pipe and the valve cavity is provided with a damping pipe inner cavity, and the heat medium inlet flange is communicated with the outer wall of the valve body in the main valve core assembly.
Optionally, the medium flow channel runs in a zigzag shape in the main valve body.
The utility model discloses technical scheme's beneficial effect is:
the utility model discloses a set up heat medium access & exit flange, the main valve body adopts high-temperature steam heat tracing to press from both sides the cover design, all lets in high-temperature steam between valve body outer wall, damping pipe inner chamber and the packing box and carries out the companion's heat, and balanced valve body inside and outside wall temperature improves valve body thermodynamic performance.
The main valve core assembly adopts a damping pipe designed by a corrugated pipe balance element, and if the pressure of a pipeline is unstable or fluctuates greatly, the multilayer corrugated pipe has strong displacement compensation, vibration reduction, noise reduction and pressure stabilization capabilities. The metal corrugated pipe is designed into a rotary structure, the rotary corrugated pipe seal has a self-cleaning centrifugal effect, and slurry deposition and inner-side coking at the U-shaped position of the corrugated pipe are reduced.
The spring is arranged in the damping pipe, so that the sealing performance under the working condition of high temperature and high pressure can be improved, and the contact type corrugated pipe seal adopts larger compression amount. The performance of the corrugated pipe under the action of high-temperature external load is obviously different from that under the action of normal-temperature external load, the deformation of the corrugated pipe is continuously increased along with the increase of time at high temperature, axial instability can be caused, and the pretightening force for improving the sealing is gradually reduced.
Drawings
FIG. 1 is a schematic structural view of a slurry redundancy check valve according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a slurry redundant check valve in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a damping tube in an embodiment of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Referring to fig. 1, 2 and 3, a slurry redundancy check valve of an embodiment is shown, wherein a main valve body formed by splicing a first high-temperature heat tracing jacket 1 and a second high-temperature heat tracing jacket 2 is included; a medium flow passage 20 and a valve cavity 30 are crossed and communicated in the main valve body; the first high-temperature heat tracing jacket 1 is provided with a main valve core assembly 3, and a valve core of the main valve core assembly 3 is inserted into the valve cavity 30; the second high-temperature heat tracing jacket 2 is provided with an auxiliary valve core assembly 4, and a valve core of the auxiliary valve core assembly 4 is inserted into the valve cavity 30; a heating medium inlet flange 5 and a first heating medium outlet flange 6 are arranged on the first high-temperature heat tracing jacket 1; a second heating medium outlet flange 7 is arranged on the second high-temperature heat tracing jacket 2; the medium flow path 20 is blocked when the spool of main spool assembly 3 is abutted against the spool of secondary spool assembly 4.
In this embodiment, the main valve core assembly 3 includes a main valve housing 31 connected to a port of the valve cavity 30 on the first high temperature heat tracing jacket 1, a main valve stem 32 installed in the main valve housing 31, a main hand wheel 34 connected to a screw of the main valve stem 32, a damping tube 33 located in the valve cavity 30 and fixed to an end of the valve stem 32, and a spring 10 installed inside the damping tube 33 and sleeved outside the main valve stem 32, wherein the damping tube 33 is made of a metal material, such as stainless steel, nickel-based alloy, and the like.
In this embodiment, the sub valve body assembly 4 includes a sub valve housing 41 connected to a port of the valve chamber 30 located on the second high temperature heat tracing jacket 2, a sub valve rod 42 installed in the sub valve housing 41, and a sub hand wheel 43 screw-connected to the sub valve rod 42, the sub valve rod 42 coincides with the axis of the main valve rod 32, and the sub valve rod 42 blocks the medium flow path 20 when abutting against the damping pipe 33.
In this embodiment, a surface of the damping tube 33 facing the sub-stem 42 is spherical 331, a surface 421 of the sub-stem 42 facing the damping tube 33 is concave spherical surface (not shown), and the sub-stem 42 and the damping tube 33 are butted against each other by the spherical surface and the concave spherical surface.
In this embodiment, the damping tube 33 is installed in interference fit with the inner wall of the valve chamber 30, and the auxiliary valve rod 42 is installed in clearance fit with the inner wall of the valve chamber 30.
In this embodiment, the damping tube 33 is a rotating corrugated damping tube with a continuous U-shaped groove structure 332 on the outer surface.
In this embodiment, two ends of the spring 10 respectively abut against the top and the bottom inside the damping tube 33, and the material of the spring 10 is INCONEL.
In the embodiment, the heat medium inlet flange 5, the first heat medium inlet flange 6 and the first heat medium outlet flange 7 are communicated with a channel 8 outside the main valve body; the part of the main valve body communicated with the second heat medium outlet flange is a stuffing box 35, the part of the main valve body positioned at the damping pipe 33 and the valve cavity 30 is a damping pipe inner cavity 36, and the heat medium inlet flange 5 is communicated with the inner wall of the damping pipe 33 in the main valve core component 3 36.
In this embodiment, the medium flow passage 20 is in a zigzag shape in the main valve body.
The features and functions of the present invention will be further understood from the following description.
In order to further improve the flowing characteristic of a slurry medium in the embodiment, the valve clack assembly is opened and closed flexibly, the main valve body is designed by adopting a high-temperature steam tracing jacket, high-temperature steam is introduced into the outer wall of the valve body, the inner cavity of the damping tube and the packing box for tracing, the temperature of the inner wall and the outer wall of the valve body is balanced, and the thermodynamic performance of the valve body is improved.
The main spool assembly is designed with bellows balance element damping. If the pressure of the pipeline is unstable or fluctuates greatly, the multilayer corrugated pipe has strong displacement compensation, vibration reduction, noise reduction and pressure stabilization capabilities. The metal corrugated pipe is designed into a rotary structure, the rotary corrugated pipe seal has a self-cleaning centrifugal effect, and slurry deposition and inner-side coking at the U-shaped position of the corrugated pipe are reduced.
The spring is arranged in the damping pipe, so that the sealing performance under the working condition of high temperature and high pressure can be improved, and the contact type corrugated pipe seal adopts larger compression amount. The performance of the corrugated pipe under the action of high-temperature external load is obviously different from that under the action of normal-temperature external load, the deformation of the corrugated pipe is continuously increased along with the increase of time at high temperature, axial instability can be caused, and the pretightening force for improving the sealing is gradually reduced. As a seal redundancy design, the springs of INCONEL material provide constant preload even when operated at very high temperatures.
Reliability redundancy design
Main hand wheel: the rotary table can rotate within a certain opening range regularly to ensure normal work. The head of the valve rod is a convex spherical surface, the supporting surface is a plane, the axial force of the valve rod uniformly and effectively acts on the valve core, and the clearance between the valve rod and the valve core assembly allows the valve rod to rotate in a certain range. Complete closure of the check valve is inhibited during pump operation to avoid interference with flow.
Auxiliary handwheels: when parameters such as pressure, flow velocity and the like behind the valve are abnormal, after the normal hand wheel is confirmed to be fully opened, the auxiliary hand wheel of the full-stroke switch is opened for multiple times, and the valve can be opened when the main valve core assembly is blocked due to solid deposition. The auxiliary valve core is a concave spherical surface and is matched with the arc surface of the main valve core, the axial force is uniform, and the jacking force can be adjusted according to the input force of the auxiliary hand wheel.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.
Claims (9)
1. A slurry redundant check valve, comprising:
the main valve body is formed by splicing a first high-temperature heat tracing jacket and a second high-temperature heat tracing jacket;
a medium flow passage and a valve cavity are formed in the main valve body in a crossed and communicated manner;
the first high-temperature heat tracing jacket is provided with a main valve core assembly, and a valve core of the main valve core assembly is inserted into the valve cavity;
an auxiliary valve core assembly is installed on the second high-temperature heat tracing jacket, and a valve core of the auxiliary valve core assembly is inserted into the valve cavity;
a heating medium inlet flange and a first heating medium outlet flange are mounted on the first high-temperature heat tracing jacket;
a second heating medium outlet flange is arranged on the second high-temperature heat tracing jacket;
and when the valve core of the main valve core assembly is butted with the valve core of the auxiliary valve core assembly, the medium flow passage is blocked.
2. The redundant check valve of claim 1 wherein the main spool assembly includes a main spool housing connected to a port of the valve chamber on the first high temperature heat tracing jacket, a main stem mounted in the main spool housing, a main hand wheel connected to the main stem screw, a damping tube located in the valve chamber and fixed to an end of the stem, and a spring mounted inside the damping tube and sleeved outside the main stem.
3. The slurry redundancy check valve of claim 2, wherein the secondary spool assembly comprises a secondary valve housing connected to a port of the valve chamber located on the second high temperature heat tracing jacket, a secondary valve stem mounted in the secondary valve housing, a secondary hand wheel connected to the secondary valve stem screw, the secondary valve stem coinciding with the axis of the main valve stem, the secondary valve stem blocking the media flow path when interfacing with the damping tube.
4. The redundant check valve of claim 3 wherein the surface of the dampener tube facing the secondary stem is spherical and the surface of the secondary stem facing the dampener tube is spherical and concave, and wherein the secondary stem interfaces with the dampener tube by spherical and concave spherical surfaces.
5. The slurry redundancy check valve of claim 3, wherein the damping tube is installed with an interference fit with the inner wall of the valve chamber, and the secondary valve stem is installed with a clearance fit with the inner wall of the valve chamber.
6. The slurry redundant check valve of claim 2 wherein the damper tube is a rotary corrugated damper tube having an outer surface with a continuous U-shaped groove configuration.
7. The slurry redundant check valve of claim 2 wherein both ends of the spring abut the top and bottom, respectively, within the damper tube.
8. The slurry redundancy check valve of claim 2, wherein the heat medium inlet flange, the first heat medium outlet flange and the second heat medium outlet flange communicate in a passage in the main valve body; the main valve body is internally communicated with the first heat medium outlet flange and the second heat medium outlet flange and is provided with a stuffing box, the main valve body is internally positioned in the damping pipe and the valve cavity is provided with a damping pipe inner cavity, and the heat medium inlet flange is communicated with the outer wall of the valve body in the main valve core assembly.
9. The slurry redundant check valve of claim 1 wherein said media flow path is oriented in a zigzag fashion within said main valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022410022.9U CN214889075U (en) | 2020-10-27 | 2020-10-27 | Redundant check valve of thick liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022410022.9U CN214889075U (en) | 2020-10-27 | 2020-10-27 | Redundant check valve of thick liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214889075U true CN214889075U (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022410022.9U Active CN214889075U (en) | 2020-10-27 | 2020-10-27 | Redundant check valve of thick liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214889075U (en) |
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2020
- 2020-10-27 CN CN202022410022.9U patent/CN214889075U/en active Active
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