CN208348553U - A kind of plug valve - Google Patents
A kind of plug valve Download PDFInfo
- Publication number
- CN208348553U CN208348553U CN201820854460.4U CN201820854460U CN208348553U CN 208348553 U CN208348553 U CN 208348553U CN 201820854460 U CN201820854460 U CN 201820854460U CN 208348553 U CN208348553 U CN 208348553U
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- Prior art keywords
- valve
- spool
- valve body
- valve seat
- plug
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Abstract
The utility model discloses a kind of plug valves, including valve body, valve deck, and spool, it is provided with valve seat on the valve body of spool two sides, sealing structure is provided between valve seat and valve body, sealing structure includes the pressing ring being arranged between valve seat and valve body, pressing ring forms the holding tank that several circumference along pressing ring are arranged towards valve body side, is equipped with the preloading spring connecting with valve body in holding tank；In above-mentioned plug valve, preloading spring can give pretightning force of the pressing ring to valve seat direction, so that pressing ring squeezes valve seat, valve seat is close to spool, sealing is formed between valve seat and spool, and flexible graphite sealing ring can also be compressed by pressing ring in the process, sealing is formed between valve body and valve seat, and, using high-temperature-resistant flexible carbon seal ring, guarantee that plug valve can use in worst hot case, due to sealing gapless between valve seat and spool, between valve seat and valve body, suitable for the medium containing solid particulate matter, while but also plug valve reaches zero leakage.
Description
Technical field
The utility model relates to valve technology fields, and in particular to a kind of plug valve.
Background technique
Plug valve guards against the fluid of medium commonly used in slurries and containing mixing such as granular patterns, as medium in conveyance conduit
It cuts off or releases, under normal circumstances, for more universal on room temperature device, due to being to be directly connected to hand with the cock body with circular cone
Handle operates 90 degree of revolutions and can easily switch, and has many advantages, such as that opening and closing speed is fast, with small vibration, safe operation is reliable.
Currently, the plug valve for being commonly used for oil-gas pipeline uses backspin plug pressure balance type structure, between valve body and valve seat
Using grease sealed structure, since grease returns thawing under high temperature environment, which is unsuitable for worst hot case；For chemical industry row
The plug valve of industry uses built-in bush type structure, pushes spool and valve seat to be fitted close to form sealing by the screw on valve deck,
But this poorly sealed close, there are gaps with valve seat for spool, during the work time, the medium containing particulate matter can through spool with
The gap of valve seat enters plug valve, causes to reveal.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome defect in the prior art, to provide one kind
Plug valve suitable for worst hot case and containing particulate matter medium and sealed reliable.
A kind of plug valve, the valve body including forming the cavity for flow of media are fitted in the valve of the valve body upper end
Lid, and be mounted in the cavity, realize the spool of the plug valve opening and closing by operating mechanism, the spool two sides it is described
It is provided with valve seat on valve body, the sealing structure that can prevent the plug valve leakage is provided between the valve seat and the valve body,
The sealing structure includes the pressing ring being arranged between the valve seat and the valve body, the pressing ring towards the valve body side at
Type has the holding tank of several circumference settings along the pressing ring, the preload bullet of valve body connection when being equipped in the holding tank
Spring, the valve seat and the pressing ring are provided with flexible graphite sealing ring close to the junction of the valve body.
Preferably, the lower end of the valve body is provided with the bottom cover coaxial with the valve deck.
Preferably, the operating mechanism includes being arranged in the middle part of the valve deck, being coaxial with the valve deck and described in extending into
Valve body connects the valve rod of the spool, and setting the bottom cover, the spool can be supported in the valve rod under the action of rotate
Spin.
Preferably, balance ring is provided on the outside of the valve rod and the spool junction.
Preferably, the sealing surface spray fusing of the outer surface of the spool and the valve seat has alloy material, the institute of the spool
It states and is coated with wear-resistant material in valve chamber.
It is fixed by screw bolt and nut between the valve deck and the valve body and between the bottom cover and the valve body
Connection.
Technical solutions of the utility model have the advantages that
1. plug valve provided by the utility model, including valve body, valve deck and spool, it is provided on the valve body of spool two sides
Valve seat, be provided between valve seat and valve body can prevent plug valve reveal sealing structure, sealing structure include setting valve seat with
Pressing ring between valve body, pressing ring form the holding tank that several circumference along pressing ring are arranged, peace in holding tank towards valve body side
Equipped with when valve body connection preloading spring；Above-mentioned plug valve utilizes pressing ring and preloading spring, preloading spring energy in the two sides of valve seat
To pressing ring to the pretightning force in valve seat direction, so that pressing ring squeezes valve seat, valve seat is close to spool, is formed between valve seat and spool close
Envelope, and flexible graphite sealing ring can also be compressed by pressing ring in the process, and sealing is formed between valve body and valve seat, moreover, using
High-temperature-resistant flexible carbon seal ring guarantees that plug valve can use in worst hot case, due between valve seat and valve rod, valve seat
Gapless is sealed between valve body, suitable for the medium containing solid particulate matter, while but also plug valve reaches zero leakage.
2. being provided with balance ring on the outside of plug valve provided by the utility model, the valve rod and the spool junction；
This is that spool is worn in use in order to prevent, the rotation center of the spool of spool and valve rod junction and valve rod
Rotation center decentraction leads to the situation of spool jam.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of plug valve provided by the utility model；
Fig. 2 is the schematic diagram of valve seat shown in FIG. 1 and sealing mechanism；
Description of symbols: 1- valve body, 2- valve seat, 3- spool, 4- spin, 5- bottom cover, 6- valve rod, 7- balance ring, 8- valve
Lid, 9- pressing ring, 10- preloading spring, 11- flexible graphite sealing ring.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
As shown in Figure 1, plug valve includes the valve body 1 for forming the cavity for flow of media, it is fitted on the valve body 1
The valve deck 8 at end, and be mounted in the cavity, the spool 3 that the plug valve is opened and closed, the spool 3 are realized by operating mechanism
Valve seat 2 is provided on the valve body 1 of two sides, being provided between the valve seat 2 and the valve body 1 can prevent the plug valve from letting out
The sealing structure of dew, as shown in Fig. 2, the sealing structure includes the pressing ring 9 being arranged between the valve seat 2 and the valve body 1,
The pressing ring 9 forms the holding tank that several circumference along the pressing ring 9 are arranged, the holding tank towards 1 side of valve body
The preloading spring 10 that the valve body 1 connects when being inside equipped with, the valve seat 2 is with the pressing ring 9 close to the junction of the valve body 1
It is provided with flexible graphite sealing ring 11.
Above-mentioned plug valve utilizes the pressing ring 9 and preloading spring 10,10 energy of preloading spring in the two sides of the valve seat 2
To the pressing ring 9 to the pretightning force in 2 direction of valve seat, so that the pressing ring 9 squeezes the valve seat 2, the valve seat 2 is close to institute
Spool 3 is stated, forms sealing between the valve seat 2 and the spool 3, and the flexible graphite sealing ring 11 also can in the process
It is compressed by the pressing ring 9, forms sealing between the valve body 1 and the valve seat 2, moreover, using high-temperature-resistant flexible graphite
Sealing ring 11 guarantees that the plug valve can use in worst hot case, due between the valve seat 2 and the valve rod 6, the valve
Gapless is sealed between seat 2 and the valve body 1, suitable for the medium containing solid particulate matter, while but also the plug valve
Reach zero leakage.
Further, the lower end of the valve body 1 is provided with the bottom cover 5 coaxial with the valve deck 8；The valve deck 8 and the valve
It is fixedly connected by screw bolt and nut between body 1 and between the bottom cover 5 and the valve body 1；This is for edge disassembly
And installation.
Further, the operating mechanism includes setting at 8 middle part of the valve deck, coaxial with the valve deck 8 and extend into institute
It states valve body 1 and connects the valve rod 6 of the spool 3, and the bottom cover 5 is set, the spool 3 can be supported in the work of the valve rod 6
With the spin 4 of lower rotation；The rotation valve rod 6 in the plug valve, valve rod 6 will cooperate rotation to adjust the spool 3 with spin 4
Axial position, realize the opening and closing of plug valve, rapid operation.
In the present embodiment, there are minim gaps for the inner wall of the outer peripheral surface of the spool 3 and the valve body 1, can bear micro-
Amount is floated and thermal expansion, to avoid medium temperature and pressure on spool 3 push and caused by influence.
Further, balance ring 7 is provided on the outside of the valve rod 6 and 3 junction of spool；This is described in order to prevent
Spool 3 is worn in use, rotation center and institute of the spool 3 with the spool 3 of 6 junction of valve rod
The rotation center decentraction for stating valve rod 6, the situation for causing the spool 3 stuck.
Further, the outer surface of the spool 3 and the sealing surface spray fusing of the valve seat 2 have alloy material, the spool 3
Wear-resistant material is coated in the valve chamber；This is to prevent the medium from causing to the plug valve to protect the plug valve
Damage.
In the present embodiment, first the pressing ring 9 and the preloading spring 10 being mounted on the pressing ring 9 are packed into described
The valve seat 2 is being packed into the valve body 1, is finally being packed into the spool 3, passes through the spool 3 and institute by the mounting groove of valve body 1
The valve seat 2 is fixed in the valve body 1 by the collective effect for stating valve body 1.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (6)
1. a kind of plug valve, the valve body (1) including forming the cavity for flow of media, are fitted in the valve body (1) upper end
Valve deck (8), and be mounted in the cavity, realize the spool (3) of the plug valve opening and closing by operating mechanism, feature exists
In being provided with valve seat (2) on the valve body (1) of spool (3) two sides, set between the valve seat (2) and the valve body (1)
It is equipped with the sealing structure that can prevent the plug valve leakage, the sealing structure includes being arranged in the valve seat (2) and the valve
Pressing ring (9) between body (1), the pressing ring (9) form several circles along the pressing ring (9) towards the valve body (1) side
The holding tank of week setting, the preloading spring (10) of valve body (1) connection, the valve seat (2) when being equipped in the holding tank
The junction of the valve body (1) is provided with flexible graphite sealing ring (11) with the pressing ring (9).
2. plug valve according to claim 1, which is characterized in that the lower end of the valve body (1) is provided with and the valve deck
(8) coaxial bottom cover (5).
3. plug valve according to claim 2, which is characterized in that the operating mechanism includes being arranged in the valve deck (8)
It is middle part, coaxial with the valve deck (8) and extend into the valve rod (6) that the valve body (1) connect the spool (3), and be arranged in institute
The spin (4) stated bottom cover (5), the spool (3) can be supported to rotate under the action of the valve rod (6).
4. plug valve according to claim 3, which is characterized in that the valve rod (6) is outer with the spool (3) junction
Side is provided with balance ring (7).
5. plug valve according to claim 1, which is characterized in that the outer surface of the spool (3) and the valve seat (2)
Sealing surface spray fusing has alloy material, is coated with wear-resistant material in the cavity of the spool (3).
6. plug valve according to claim 2, which is characterized in that between the valve deck (8) and the valve body (1) and institute
It states and is fixedly connected by screw bolt and nut between bottom cover (5) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854460.4U CN208348553U (en) | 2018-06-04 | 2018-06-04 | A kind of plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854460.4U CN208348553U (en) | 2018-06-04 | 2018-06-04 | A kind of plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208348553U true CN208348553U (en) | 2019-01-08 |
Family
ID=64892167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820854460.4U Active CN208348553U (en) | 2018-06-04 | 2018-06-04 | A kind of plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208348553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107710A (en) * | 2019-06-03 | 2019-08-09 | 宁波真格液压科技有限公司 | A kind of regulating valve |
-
2018
- 2018-06-04 CN CN201820854460.4U patent/CN208348553U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107710A (en) * | 2019-06-03 | 2019-08-09 | 宁波真格液压科技有限公司 | A kind of regulating valve |
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