CN209705408U - A kind of suspension type labyrinth tube-in-tube structure - Google Patents
A kind of suspension type labyrinth tube-in-tube structure Download PDFInfo
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- CN209705408U CN209705408U CN201920385948.1U CN201920385948U CN209705408U CN 209705408 U CN209705408 U CN 209705408U CN 201920385948 U CN201920385948 U CN 201920385948U CN 209705408 U CN209705408 U CN 209705408U
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- valve body
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- sleeve
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Abstract
The utility model relates to a kind of suspension type labyrinth tube-in-tube structures, belong to control valve for fluids technical field.It includes valve body, upper cover, sleeve assembly and core assembly, and inlet channel and outlet flow are distributed on the valve body, and the inlet channel and outlet flow are respectively placed in valve body both ends；The sleeve assembly is mounted on valve body epicoele boss；Core assembly is set in the sleeve assembly, and the core assembly uses pilot-operated type valve core structure, and core assembly can move along a straight line along sleeve lining；It is provided with upper cover in the valve body and outlet flow axial direction, gasket is provided between the valve body and upper cover, valve body is connected as one with upper cover by stud and nut.The utility model can effectively play the effect of pressure drop, extend the service life of entire sleeve assembly, be able to bear high temperature and pressure, adjust the operating condition that pressure difference is high, sealing grade is high；The suspension type labyrinth tube-in-tube structure requirement on machining accuracy is lower, required executing agency's thrust is smaller, and sealing effect is reliable.
Description
Technical field
The utility model relates to a kind of tube-in-tube structure, specifically one kind is able to bear high temperature and pressure, adjust pressure difference it is high,
A kind of suspension type labyrinth tube-in-tube structure of V grade of class requirement of leakage or more, belongs to control valve for fluids technical field.
Background technique
The usually only split type balanced seal type sleeve adjusting valve of traditional telescoping valve structure and integral sleeve regulating valve
Two kinds.Both the above tube-in-tube structure is all to require to have one group of gasket up and down to guarantee to reveal grade, and lower gasket is to guarantee valve
Leakage, Upper gasket prevent medium from not leaking outside in not.Due to the presence of mismachining tolerance, if valve body positioning height is fixed greater than sleeve
Position height, although gasket prevents medium from not leaking outside in first time by the compression for screwing guarantee Upper gasket of bolt, nut,
But since lower gasket is not efficiently compressed, medium is caused to flow out from gasket;If valve body positioning height is positioned less than sleeve
Highly, then Upper gasket causes to leak outside because of not compressing completely.Secondly, although above two tube-in-tube structure can pass through set
The effect of certain decompression, noise reduction is played in noise reduction hole on cylinder, but when adjusting pressure difference greater than 4MPa, can not pass through increasing
The form of strong trim hardness or through hole plays the purpose of decompression, noise reduction, so as to cause valve site noise in big, valve
The short phenomenon of part maintenance period.Third, (although one kind is filled glass fiber to split type balanced seal jacket cylinder regulating valve structure
PTFE seal+single valve seat hard sealing structure) it can reach V grade or more of leakage grade by conventional machining, but due to
It is sealed thereon using filled glass fiber PTFE seal, so PTFE fails when temperature is greater than 250 DEG C；Monoblock type set
Although cylinder regulating valve is able to bear high temperature, it is using upper and lower double-valve-seat hard sealing structure, although being repaired by machining
Reach V grade or V grade or more with can satisfy leakage class with underhand polish, but the success rate once assembled only has 50%, leads
Sealing surface has been caused to need repetition machining repair and underhand polish, lost labor low with time cost, product interchangeability；It passes through simultaneously
After crossing the use of long period, the damage of sealing surface, deformation will lead to upper-lower seal face cannot achieve the effect that sealing simultaneously, most
It is exceeded to occur leakage eventually.From this it can be concluded that split type balanced seal type sleeve adjusting valve and integral sleeve regulating valve
It is not able to satisfy high temperature and pressure, adjusts the application of pressure difference height, V grade of class requirement of leakage or more operating condition.
Summary of the invention
The utility model is in view of the above-mentioned problems, provide a kind of suspension type labyrinth tube-in-tube structure, the tube-in-tube structure machining accuracy
It is required that it is lower, be able to bear high temperature and pressure, adjust the operating condition that pressure difference is high, sealing grade is high.
According to the technical solution of the utility model includes: a kind of suspension type labyrinth tube-in-tube structure comprising valve body, upper cover, sleeve
Component and core assembly are distributed with inlet channel and outlet flow, the inlet channel and outlet flow point on the valve body
It is not placed in valve body both ends；The sleeve assembly is mounted on valve body epicoele boss；Spool group is set in the sleeve assembly
Part, the core assembly use pilot-operated type valve core structure, and core assembly can move along a straight line along sleeve lining；The valve body and outlet
It is provided with upper cover in runner axial direction, gasket is provided between the valve body and upper cover, valve body and upper cover pass through stud and nut
It is connected as one.
The sealing surface of seat and valve body are integral type as a further improvement of the utility model, avoid valve cup bottom
A possibility that portion reveals.
The sleeve in the sleeve assembly is labyrinth group as a further improvement of the utility model, and the labyrinth group is adopted
It is formed with the labyrinth piece of several sheets, each labyrinth on piece is equipped with labyrinth flow-path.
Guide sleeve, the labyrinth are installed on the epicoele boss of the valve body as a further improvement of the utility model,
Group is fixed on guide sleeve by the first fastening screw.
As a further improvement of the utility model, the sleeve assembly mounting means be suspension type, bottom not with valve
Body bottom cavity interior contact is provided with lifting eye in the guide sleeve end, convenient for entire sleeve assembly installation and removal
Lifting.
The core assembly includes main valve plug, pressing plate, pilot valve, positioning as a further improvement of the utility model,
Pin and compressed spring；The main valve plug uses single valve seat hard sealing structure, and it is uniform that the main valve plug upper end is provided with a circle
The location hole of distribution is separately installed with positioning pin and compressed spring；Described positioning pin one end is mounted in the location hole of main valve plug,
The other end passes through the U-shaped hole in pilot valve, and in main valve plug front, positioning step is provided with pressing plate, between pressing plate and main valve plug
Axial direction is fixed by the second fastening screw；Pilot valve one end passes through the through-hole of pressing plate, and the other end passes through leading for upper cover
Xiang Kong.
The main valve plug is equipped with guide ring and swelling in the radial direction as a further improvement of the utility model,
Ring.
The utility model has the technical effect that
1) since underslung structure is without requiring sleeve assembly consistent with the axial height size of valve body, each components are mutual
It is transsexual relatively strong, improve the economic benefit of user.
2) applying working condition of some High Pressure Differences can be played effectively using labyrinth group due to sleeve assembly
The effect of pressure drop extends the service life of entire sleeve assembly.
3) since spool uses single valve seat hard sealing structure, spool and valve seat are not needed by repeatedly machining repair and people
Work grinding can reach V grade or V grade or more leakage class, improve efficiency；Pilot-operated type spool is met under high temperature simultaneously
The requirement used, required executing agency's thrust are with the obvious advantage again smaller than uneven formula valve, economy.
4) between spool outer diameter and sleeve lining there are gap, ensure that spool will not because of high temperature and with sleeve locking；
Enhance the guiding to spool by guide ring and distensible ring simultaneously.
5) guide sleeve inner wall uses inner circle ground finish technique, improves the finish of inner wall, while passing through material itself
Heat treatment or the techniques such as nitriding improve its hardness, extend the service life of guide sleeve.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Description of symbols: 1- valve body, the labyrinth 2- group, 3- main valve plug, the first fastening screw of 4- 1, the second fastening screw of 5-
2,6- pressing plate, 7- gasket, 8- stud, 9- nut, 10- upper cover, 11- pilot valve, 12- guide sleeve, 13- guide ring, 14- swelling
Ring, 15- positioning pin, 16- compressed spring, 17- sleeve assembly, 18- core assembly 18.
Specific embodiment
Specific embodiment of the present utility model is further described with reference to the accompanying drawing.
The utility model mainly includes valve body 1, gasket 7, stud 8, nut 9, upper cover 10, sleeve assembly 17 as shown in Figure 1:
And core assembly 18 forms, the valve body 1 is distributed with inlet channel and outlet flow, is respectively placed in 1 both ends of valve body, flows to
Mode is flowed into what bottom went out using height；The sleeve assembly 17 is mounted on 1 epicoele boss of valve body, constrains sleeve assembly
17 movement inside valve body 1 in radial directions；Core assembly 18,18 energy of core assembly are set in the sleeve assembly 17
It moves along a straight line along 17 inner wall of sleeve assembly；When core assembly 18 moves in sleeve assembly 17, realize to inlet channel and outlet
The adjusting of runner connected state；The 1 outlet flow axis of valve body sets up upper cover 10, is arranged between valve body 1 and upper cover 10
There is gasket 7, purpose is that medium is prevented to flow out in the gap between valve body 1 and upper cover 10, and valve body 1 and upper cover 10 pass through stud 8
It is connected as one with nut 9.
Further, the sleeve in sleeve assembly 17 is labyrinth group 2, further includes the first fastening screw 1, guide sleeve 12；Institute
The guide sleeve 12 stated is mounted on the epicoele boss of valve body 1, has fixed the movement of guide sleeve 12 in radial directions, described to lead
12 ends of set are provided with one group of lifting eye, convenient for the lifting of entire 17 installation and removal of sleeve assembly, the guide sleeve 12 is logical
It crosses the techniques such as the heat treatment or nitriding of material itself and improves its hardness, to achieve the purpose that extend inner wall service life；Pass through
Labyrinth group 2 is fixed on guide sleeve 12 by the first fastening screw 1；The labyrinth group 2 is formed using the labyrinth piece of several sheets,
The designed labyrinth flow-path of each with good grounds actual condition of labyrinth on piece, after the decompression for several times that medium passes through labyrinth flow-path (due to
Labyrinth group technology is prior art, is no longer elaborated herein), outlet flow is entered from labyrinth group 2；Several sheets
Labyrinth piece forms labyrinth group 2 by soldering tech, and soldering, which refers to, melts the non-ferric of such as brass and cored solder etc in contact position
Filling metal carrys out a kind of technological means of welding metal, and heating temperature is lower, and connector is smooth, tissue and mechanical performance
Change small, workpiece size is accurate.
Further, when the valve body 1 is in close state with 10 valve of upper cover, by screw stud 8 and nut 9 it
Between pretightning force reach the decrement of compression gasket 7, there is not the requirement to leak outside to meet valve, since sleeve assembly 17 is
Suspension type, 2 bottom of labyrinth group are not contacted with valve body positioning surface, and during entirely screwing, sleeve assembly 17 will not be because of bolt
Power it is excessive and be deformed or it is too small and the phenomenon that so that valve is leaked outside.
Further, core assembly 18 is set in the sleeve assembly 17, core assembly 18 can be transported along sleeve lining straight line
Dynamic, the core assembly 18 includes main valve plug 3, positioning pin 15, compressed spring 16, pressing plate 6, the second fastening screw 5, pilot valve
11, guide ring 13 and distensible ring 14；3 upper end of main valve plug is provided with the equally distributed location hole of a circle, and it is fixed to be separately installed with
Position pin 15, compressed spring 16；15 bottom of positioning pin is mounted in the location hole of main valve plug 3, and other end passes through pilot valve 11
On U-shaped hole, do not rotated with this to fix pilot valve 11；Compressed spring 16 is mainly used for pilot valve open
Moment, spring give a deboost, accelerate the speed that pilot valve 11 is opened；It is set in 3 front positioning step of main valve plug
It is equipped with a pressing plate 6, axial direction is fixed by the second fastening screw 5 between pressing plate 6 and main valve plug 3；Pilot valve 11
One end passes through the through-hole of pressing plate 6, and the other end is pierced by from the pilot hole of upper cover 10, and valve changes from closed state to opening state
When, the sealing surface first between 11 elder generation of pilot valve and main valve plug 3 is detached from, and then main valve plug 3 is driven to move in sleeve assembly 17
It moves to realize the adjusting to inlet channel and outlet flow connected state；3 groups of guiding are installed in the radial direction in main valve plug 3
Ring 13 and distensible ring 14, they can guarantee that making main valve plug 3 always plays the role of a guiding, is covering core assembly 18
Concussion in cartridge module 17.
Inner wall in the utility model with core assembly 18 in sleeve assembly 17 moves up, at this time on sleeve assembly 17
Window be gradually opened, medium enters outlet flow along the inlet channel of valve body 1；On valve body and in outlet flow axial direction
Upper cover 10 is set, gasket 7 is provided between valve body 1 and upper cover 10, purpose is to prevent medium between valve body 1 and upper cover 10
It is flowed out in gap.
A kind of suspension type labyrinth tube-in-tube structure in the utility model, it is mutual using each components of underslung tube-in-tube structure first
It is transsexual relatively strong, improve the economic benefit of user；Secondly in the applying working condition of some High Pressure Differences, labyrinth type sleeve assembly 17 can be with
The effect for effectively playing pressure drop, extends the service life of entire sleeve assembly 17；Third, core assembly 18 is using guide
Formula structure solves an assembly rate and reaches V grade or V grade or more leakage class, improves efficiency, while meeting height again
The applying working condition of temperature, the required lesser feature of executing agency's thrust, wide market.Suspension type labyrinth tube-in-tube structure processing
Required precision is lower, required executing agency's thrust is smaller, and sealing effect is reliable.
Claims (7)
1. a kind of suspension type labyrinth tube-in-tube structure, including valve body (1), upper cover (10), sleeve assembly (17) and core assembly (18),
It is characterized by: inlet channel and outlet flow are distributed on the valve body (1), the inlet channel and outlet flow difference
It is placed in valve body (1) both ends；The sleeve assembly (17) is mounted on valve body (1) epicoele boss；In the sleeve assembly (17)
Interior setting core assembly (18), the core assembly (18) use pilot-operated type valve core structure, and core assembly (18) can be along sleeve
Wall linear motion；Upper cover (10) are provided in the valve body (1) and outlet flow axial direction, between valve body (1) and upper cover (10)
It is provided with gasket (7), valve body (1) is connected as one by stud (8) with nut (9) with upper cover (10).
2. a kind of suspension type labyrinth as described in claim 1 tube-in-tube structure, it is characterised in that: the sealing surface of seat and valve body
(1) it is an integral structure.
3. a kind of suspension type labyrinth as described in claim 1 tube-in-tube structure, it is characterised in that: in the sleeve assembly (17)
Sleeve is labyrinth group, and the labyrinth group is formed using the labyrinth piece of several sheets, and each labyrinth on piece is equipped with labyrinth flow-path.
4. a kind of suspension type labyrinth as described in claim 1 tube-in-tube structure, it is characterised in that: the epicoele of the valve body (1) is convex
It is equipped on platform guide sleeve (12), the labyrinth group is fixed on guide sleeve (12) by the first fastening screw.
5. a kind of suspension type labyrinth as described in claim 1 tube-in-tube structure, it is characterised in that: sleeve assembly (17) installation
Mode is suspension type, and the guide sleeve (12) end is provided with lifting eye, is convenient for the sleeve assembly (17) installation and removal
Lifting.
6. a kind of suspension type labyrinth tube-in-tube structure as described in claim 1, it is characterised in that: the core assembly (18) includes
Main valve plug (3), pressing plate (6), pilot valve (11), positioning pin (15) and compressed spring (16)；The main valve plug (3) is using single
Valve seat hard sealing structure is provided with the equally distributed location hole of a circle in the main valve plug (3) upper end, is separately installed with positioning pin
(15) and compressed spring (16)；Described positioning pin (15) one end is mounted in the location hole of main valve plug (3), and the other end passes through guide
U-shaped hole on spool (11), in main valve plug (3), positioning step is provided with pressing plate (6), is led between pressing plate (6) and main valve plug (3)
It is fixed to cross the second fastening screw (5)；Pilot valve (11) one end passes through the through-hole of pressing plate (6), and the other end passes through upper cover (10)
Pilot hole.
7. a kind of suspension type labyrinth as claimed in claim 6 tube-in-tube structure, it is characterised in that: the radial direction of the main valve plug (3)
Guide ring (13) and distensible ring (14) are installed on direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920385948.1U CN209705408U (en) | 2019-03-21 | 2019-03-21 | A kind of suspension type labyrinth tube-in-tube structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920385948.1U CN209705408U (en) | 2019-03-21 | 2019-03-21 | A kind of suspension type labyrinth tube-in-tube structure |
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| Publication Number | Publication Date |
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| CN209705408U true CN209705408U (en) | 2019-11-29 |
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| CN201920385948.1U Active CN209705408U (en) | 2019-03-21 | 2019-03-21 | A kind of suspension type labyrinth tube-in-tube structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780314A (en) * | 2019-03-21 | 2019-05-21 | 无锡智能自控工程股份有限公司 | A kind of suspension type labyrinth tube-in-tube structure |
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2019
- 2019-03-21 CN CN201920385948.1U patent/CN209705408U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780314A (en) * | 2019-03-21 | 2019-05-21 | 无锡智能自控工程股份有限公司 | A kind of suspension type labyrinth tube-in-tube structure |
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