CN204692735U - A kind of gate valve fire resistant seal structure - Google Patents

A kind of gate valve fire resistant seal structure Download PDF

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Publication number
CN204692735U
CN204692735U CN201520121605.6U CN201520121605U CN204692735U CN 204692735 U CN204692735 U CN 204692735U CN 201520121605 U CN201520121605 U CN 201520121605U CN 204692735 U CN204692735 U CN 204692735U
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CN
China
Prior art keywords
valve
packing
fire resistant
gate valve
seal structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520121605.6U
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Chinese (zh)
Inventor
张铁军
刘亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing University of Arts and Sciences
Original Assignee
Chongqing University of Arts and Sciences
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201520121605.6U priority Critical patent/CN204692735U/en
Application granted granted Critical
Publication of CN204692735U publication Critical patent/CN204692735U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of gate valve fire resistant seal structure, it comprises the sealed body between valve gap and valve rod being located at gate valve, described sealed body comprises the rubber packing of floating seal between valve gap and valve rod, and in the valve gap being positioned outside described rubber packing and the graphite packing be sealed between this valve gap and valve rod.This gate valve fire resistant seal structure operation is easy to use, and structure is simple, can reach corresponding fire resistant requirements, can reach tiny leakage requirement again, meets the user demand that site technique is produced.

Description

A kind of gate valve fire resistant seal structure
Technical field
The utility model relates to a kind of gate valve fire resistant seal structure, belongs to valve technology field.
Background technique
Gate valve is an of paramount importance class valve at present, and it is widely used in circulation and the cut-off of the medium classes such as liquid, gas, dust, and therefore, the sealing technique for gate valve is extremely important.Existing gate valve is substantially all adopt single sealing, such as adopts rubber packing to realize sealing, to reach tiny leakage requirement.But in actual application, service condition needs to make gate valve should reach fire resistant requirements and realizes tiny leakage requirement again, certainly, has and adopt graphite packing to seal in prior art, to make it have fire resistant requirements, but such sealing can not reach tiny leakage requirement.
It is perfect that namely the utility model carries out improvement on this basis.
Summary of the invention
For above-mentioned deficiency of the prior art, the utility model aims to provide a kind of novel gate valve fire resistant seal structure, and its structure is simple, easy for operation, corresponding fire resistant requirements can be reached, tiny leakage requirement can be reached again, meet the user demand that site technique is produced.
To achieve these goals, the technical solution of the utility model: a kind of gate valve fire resistant seal structure, it comprises the sealed body between valve gap and valve rod being located at gate valve, described sealed body comprises the rubber packing of floating seal between valve gap and valve rod, and in the valve gap being positioned outside described rubber packing and the graphite packing be sealed between this valve gap and valve rod.
Further, described valve handle activity is through on the valve opening of described valve gap, there is in this valve opening step in several grades of ladders, in this ladder, be equipped with lower packing pressure cap in the middle part of step by ladder surface axially locating, described graphite packing to be arranged on this lower packing pressure cap and spacing by the upper packing pressure cap be fixed positioned in described valve opening external port; Described rubber packing is located between the step root of step in described lower packing pressure cap and ladder.
Further, V-shaped, the leather cup type of described rubber packing; Contact end face between described rubber packing and lower packing pressure cap is that face contacts.
Further, described graphite packing is V-shaped; Described lower packing pressure cap upper end, upper packing pressure cap lower end are respectively equipped with convex cone, the concave cone corresponding with described graphite packing lower end, upper end.
Further, described graphite packing is at least one.
The beneficial effects of the utility model: adopt two-stage sealing, sealed by rubber packing during normal operation, tiny leakage requirement can be reached; Even if rubber packing wrecks when breaking out of fire, but graphite packing can continue to seal, and realizes fire resistant requirements.Therefore, this gate valve fire resistant seal structure operation is easy to use, and structure is simple, can reach corresponding fire resistant requirements, can reach tiny leakage requirement again, meets the user demand that site technique is produced.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural drawing of the present utility model.
Embodiment
The utility model is further described below in conjunction with specific embodiment and accompanying drawing.
One is gate valve fire resistant seal structure as described in Figure 1, it comprises the sealed body between valve gap 1 and valve rod 7 being located at gate valve, described sealed body comprises the rubber packing 3 of floating seal between valve gap 1 and valve rod 7, and to be positioned in valve gap outside described rubber packing 31 and the graphite packing 5 be sealed between this valve gap 1 and valve rod 7.
Valve rod 7 activity in the utility model is through on the valve opening of described valve gap 1, there is in this valve opening step in several grades of ladders, in this ladder, be equipped with lower packing pressure cap 4 in the middle part of step by ladder surface axially locating, described graphite packing 5 to be arranged on this lower packing pressure cap 4 and spacing by the upper packing pressure cap 6 be fixed positioned in described valve opening external port; Described rubber packing 3 is located between the step root of step in described lower packing pressure cap 4 and ladder.
Particularly, as shown in the figure, have step in level Four ladder in valve opening, lower packing pressure cap 4 is located in the two-stage ladder of valve opening interior centre on step, with the step surface of step in this two-stage ladder formation axial limiting, and is formed unidirectional spacing.Rubber packing 3 be located at lower packing pressure cap 4 and as illustrate step in most next stage ladder step root between, and in quick condition, and the contact end face between rubber packing 3 and lower packing pressure cap 4 is face contacts, rubber packing 3 is V-shaped, leather cup type, during use, rubber packing 3 is extruded spreading under the effect of valve pocket pressure, plays seal action.
And upper packing pressure cap 6 upper end portion has flange, by this flange, upper packing pressure cap 6 bolt or screw are fixed on valve gap 1, and the operative end surface of upper packing pressure cap 6 is supported on the step surface as illustrated step in most upper level ladder, graphite packing 5 is located between packing pressure cap 6 and lower packing pressure cap 4, this graphite packing 5 is V-shaped, and lower packing pressure cap 4 upper end, upper packing pressure cap 6 lower end is respectively equipped with and described graphite packing 5 lower end, the convex cone that upper end is corresponding, concave cone, after assembling, upper packing pressure cap 6 will produce squeezing action and spreading to graphite packing 5, play seal action.In actual use, this graphite packing 5 is at least one, can set multiple series connection, determines according to factors such as concrete assembly condition, fire-resistant demands.
Certainly, for the step number of step in the ladder in valve opening, be not merely defined in step in the level Four ladder in the present embodiment, in use, this ladder can be increased and decreased as one sees fit under the normal work prerequisite not affecting rubber packing 3, graphite packing 5.
Above the technological scheme that the utility model embodiment provides is described in detail, apply specific case herein to set forth the principle of the utility model embodiment and mode of execution, the explanation of above embodiment is only applicable to the principle helping to understand the utility model embodiment; Meanwhile, for one of ordinary skill in the art, according to the utility model embodiment, embodiment and application area all will change, and in sum, this description should not be construed as restriction of the present utility model.

Claims (7)

1. a gate valve fire resistant seal structure, comprise the sealed body between valve gap (1) and valve rod (7) being located at gate valve, it is characterized in that: described sealed body comprises the rubber packing (3) of floating seal between valve gap (1) and valve rod (7), and be positioned described rubber packing (3) outside valve gap (1) in and the graphite packing (5) be sealed between this valve gap (1) and valve rod (7).
2. a kind of gate valve fire resistant seal structure according to claim 1, it is characterized in that: described valve rod (7) is movable through on the valve opening of described valve gap (1), there is in this valve opening step in several grades of ladders, in this ladder, be equipped with lower packing pressure cap (4) in the middle part of step by ladder surface axially locating, it is upper and spacing by the upper packing pressure cap (6) be fixed positioned in described valve opening external port that described graphite packing (5) is arranged at this lower packing pressure cap (4); Described rubber packing (3) is located between the step root of step in described lower packing pressure cap (4) and ladder.
3. a kind of gate valve fire resistant seal structure according to claim 2, is characterized in that: described rubber packing (3) is V-shaped, leather cup type.
4. a kind of gate valve fire resistant seal structure according to claim 3, is characterized in that: the contact end face between described rubber packing (3) and lower packing pressure cap (4) is that face contacts.
5. a kind of gate valve fire resistant seal structure according to claim 2, is characterized in that: described graphite packing (5) is V-shaped.
6. a kind of gate valve fire resistant seal structure according to claim 5, is characterized in that: described lower packing pressure cap (4) upper end, upper packing pressure cap (6) lower end are respectively equipped with convex cone, the concave cone corresponding with described graphite packing (5) lower end, upper end.
7. a kind of gate valve fire resistant seal structure according to claim 5, is characterized in that: described graphite packing (5) is at least one.
CN201520121605.6U 2015-03-02 2015-03-02 A kind of gate valve fire resistant seal structure Expired - Fee Related CN204692735U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520121605.6U CN204692735U (en) 2015-03-02 2015-03-02 A kind of gate valve fire resistant seal structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520121605.6U CN204692735U (en) 2015-03-02 2015-03-02 A kind of gate valve fire resistant seal structure

Publications (1)

Publication Number Publication Date
CN204692735U true CN204692735U (en) 2015-10-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520121605.6U Expired - Fee Related CN204692735U (en) 2015-03-02 2015-03-02 A kind of gate valve fire resistant seal structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109114299A (en) * 2018-10-19 2019-01-01 江苏神通阀门股份有限公司 A kind of valve rod double sealing structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109114299A (en) * 2018-10-19 2019-01-01 江苏神通阀门股份有限公司 A kind of valve rod double sealing structure

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151007

Termination date: 20170302

CF01 Termination of patent right due to non-payment of annual fee