CN208295125U - A kind of valve rod sealing member for fire resisting damper - Google Patents

Abstract

The utility model discloses a kind of valve rod sealing members for fire resisting damper, including main seal ring, the main seal ring meets to the end face of pressure and is disposed with annular groove, the inner peripheral surface and outer peripheral surface of the main seal ring, which are arranged with, encloses sealing lip positioned at least the one of the annular groove two sides, the annular groove, which is disposed with, makes each distracted elastic parts of the sealing lip, and the main seal ring is disposed with carbon packing ring backwards to the side of pressure.The utility model is by combining carbon packing ring and main seal ring, wherein, main seal ring can be strutted sealing lip by elastic parts, realize elastic energy storage sealing, and carbon packing ring has the function of heat-insulating, fire-preventing, and flame and high-temperature gas can be isolated, even if in graphite packing ring breakage, main seal ring is still able to maintain sealing performance, and the utility model is highly reliable, has both sealing and fireproof function.

Description

A kind of valve rod sealing member for fire resisting damper

Technical field

The utility model relates to sealing element technical field, in particular to a kind of valve rod sealing member for fire resisting damper.

Background technique

Modern industry proposes increasingly higher demands to the reliability of sealing, and sealing performance is evaluation valve products quality An important technology index.Fire resisting damper refers to the very high valve of the safety that will not be leaked in burning, main to apply There are inflammable possible operating conditions in external environment, and fire-protection valve is used under these high-risk environments, can effectively reduce fire band The harm come.Fire resisting damper valve base sealing uses metal hard-sealing, and general reliability is very high, but fire resisting damper valve stem packing seals skill Art is but always the outstanding problem not solved thoroughly for many years, and improves one of the weak link of valve reliability.Common Generally there are seal insufficient or excessive seal for high temperature valve valve stem packing sealing.In long-play at valve rod It is easy to appear leakage, the leakage of the dangers such as inflammable and explosive, hypertoxic not only results in device shut-down and economic loss, and can draw Environmental pollution is played, or even leads to personnel casualty accidents, brings very big risk to the operation of device.

In the fire resisting damper sealing applied at present, elevated-temperature seal performance, high temperature circulation switch reliability is crucial index.It passes Although the expanded graphite packing of system has outstanding self-lubrication and dilatancy, and the coefficient of resilience with higher, it is lacked Point is that frangible, anti-shearing force is poor, and expanded graphite is expanded heated, and pressing force increases, easy to break after cycling switch, is caused Valve leak.

Summary of the invention

The purpose of this utility model is to provide a kind of valve rod sealing member for fire resisting damper, overcomes expanded graphite and fill out Expect that torque is big, the disadvantages of easy fragmentation, anti-high-voltage performance is poor.

Used technical solution to solve above-mentioned technical problem:

A kind of valve rod sealing member for fire resisting damper, including main seal ring, the main seal ring are met to the end face of pressure and are arranged There is annular groove, the inner peripheral surface and outer peripheral surface of the main seal ring are arranged at least one circle positioned at the annular groove two sides Sealing lip, the annular groove, which is disposed with, makes each distracted elastic parts of the sealing lip, and the main seal ring is backwards to pressure Side is disposed with carbon packing ring.

As a further improvement of the above technical scheme, the main seal ring is disposed with towards the carbon packing ring One annulus tapering, the carbon packing ring are disposed with the first slot with the first annulus taper fit.

As a further improvement of the above technical scheme, the carbon packing ring other side is disposed with support ring, the support Ring is high temperature resistant copper component.

As a further improvement of the above technical scheme, the elastic parts includes V-arrangement spring, the main seal ring arrangement There is the limiting section abutted with the V-arrangement spring open-mouth both ends.

As a further improvement of the above technical scheme, the main seal ring meets to the side of pressure and is disposed with gland, should Gland has the pressure ring for going deep into the annular groove and being resisted against the V-arrangement spring.

As a further improvement of the above technical scheme, the cross section semicircular in shape of each sealing lip or triangle or ladder Shape or sector.

As a further improvement of the above technical scheme, the main seal ring is connected with auxiliary sealing backwards to the end face of pressure Ring, the carbon packing ring are connect with the auxiliary sealing ring, which includes at least one V-ring, the inner circumferential of the V-ring Face and outer peripheral surface are arranged with lip body.

As a further improvement of the above technical scheme, the main seal ring is disposed with first towards the auxiliary sealing ring Annulus tapering, an end face of the auxiliary sealing ring are disposed with the second slot to match with first annulus tapering, the graphite Packing ring is disposed with the first slot towards the auxiliary sealing ring, and the other end of the auxiliary sealing ring is disposed with and the first slot phase Matched second annulus tapering.

The beneficial effects of the utility model are: the utility model is by combining carbon packing ring and main seal ring, wherein Main seal ring can be strutted sealing lip by elastic parts, realize elastic energy storage sealing, and carbon packing ring has heat-insulating, fire-preventing Flame and high-temperature gas can be isolated in function, even if in graphite packing ring breakage, main seal ring is still able to maintain sealing performance, this reality With novel highly reliable, sealing and fireproof function are had both.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it His design scheme and attached drawing.

Fig. 1 is the sectional view of the utility model.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection It encloses.In addition, all connection/connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific reality Situation is applied, by adding or reducing couple auxiliary, to form more preferably coupling structure.

Referring to Fig.1, a kind of valve rod sealing member for fire resisting damper, including main seal ring 3, main seal ring 3 are preferred modified poly- The production of tetrafluoroethene material, which, which meets to the end face of pressure, is disposed with annular groove 31, i.e., shown in Fig. 1, master is close 3 upper surface of seal ring is disposed with annular groove 31, and the inner peripheral surface and outer peripheral surface of main seal ring 3 are arranged with positioned at 31 liang of annular groove Three circle sealing lips 32 of side.Wherein, annular groove 31, which is disposed with, makes the distracted elastic parts of each sealing lip 32, elastic parts packet V-arrangement spring 2 is included, V-arrangement spring 2 preferably makes of stainless steel material or alloy material, and main seal ring 3 is disposed with and V-arrangement spring 2 The limiting section 33 that open-mouth both ends abut.Further, main seal ring 3 meets the side to pressure, i.e. main seal ring 3 shown in Fig. 1 Upside, be disposed with gland 1, which, which has, gos deep into annular groove 31 and be resisted against the pressure ring 11 of V-arrangement spring 2.In addition, each The cross section semicircular in shape or triangle of sealing lip 32 are trapezoidal or fan-shaped, and the present embodiment advantageous cross sections are semicircular sealing Lip 32, when 3 upper end of main seal ring is softened, i.e. 32 place position of sealing lip is softened, and three circle sealing lips 32 form three seals, Improve sealing effect.In the present embodiment, V-arrangement spring 2 provides the power for strutting each circle sealing lip 32, and it is close to realize elastic energy storage Envelope, so that the sealing element of the utility model has extremely strong anti-pressure ability.

Main seal ring 3 is disposed with carbon packing ring 5, and preferably high-density graphite material production backwards to the side of pressure, can To protect main seal ring 3 to damage from high temperature with better heat-proof quality.Preferably, carbon packing ring 5 and primary seal Be disposed with auxiliary sealing ring between ring 3, i.e., main seal ring 3 is connected with auxiliary sealing ring backwards to the end face of pressure, carbon packing ring 5 with should Auxiliary sealing ring connection, the auxiliary sealing ring include at least one V-ring 4, and V-ring 4 equally uses modified teflon material system Make, the inner peripheral surface and outer peripheral surface of V-ring 4 are arranged with lip body 41.Those skilled in the art can carry out following according to installation space Selection: the first is not provided with auxiliary sealing ring, i.e. main seal ring 3 is disposed with the first annulus tapering towards carbon packing ring 5, stone Black packing ring 5 is disposed with the first slot with the first annulus taper fit；Second, auxiliary sealing ring is set, and auxiliary sealing ring is by one A or more than one V-ring 4 composition, i.e., main seal ring 3 is disposed with the first annulus tapering towards auxiliary sealing ring, auxiliary sealing ring One end face is disposed with the second slot to match with the first annulus tapering, and carbon packing ring 5 is disposed with first towards auxiliary sealing ring Slot, the other end of auxiliary sealing ring are disposed with the second annulus tapering to match with first slot.If auxiliary sealing ring is by several V When shape ring 4 forms, the superposition of each V shape ring 4 is constituted into auxiliary sealing ring.

Further, 5 other side of carbon packing ring is disposed with support ring 6, which is high temperature resistant copper component, support Carbon packing ring 5 simultaneously reduces its filler extrusion.

The utility model realizes elastic energy storage sealing by main seal ring 3, and anti-high-voltage performance is good, in≤15000PSI It can be used normally under pressure；Meanwhile flame and high-temperature gas are isolated by carbon packing ring 5, so that the utility model has Good heat-proof quality still can keep sealing performance by main seal ring 3 even if carbon packing ring 5 is broken.

The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to State embodiment, within the scope of knowledge possessed by those of ordinary skill in the art, can also do not depart from it is practical Various changes can be made under the premise of novel objective.

Claims (8)

1. a kind of valve rod sealing member for fire resisting damper, it is characterised in that: including main seal ring (3), the main seal ring (3) meet to The end face of pressure is disposed with annular groove (31), and the inner peripheral surface and outer peripheral surface of the main seal ring (3) are arranged with positioned at described At least one circle sealing lip (32) of annular groove (31) two sides, the annular groove (31), which is disposed with, makes each sealing lip (32) Distracted elastic parts, the main seal ring (3) are disposed with carbon packing ring (5) backwards to the side of pressure.

2. the valve rod sealing member according to claim 1 for fire resisting damper, it is characterised in that: main seal ring (3) cloth It is equipped with the first annulus tapering towards the carbon packing ring (5), the carbon packing ring (5) is disposed with to be bored with first annulus First slot of portion's cooperation.

3. the valve rod sealing member according to claim 2 for fire resisting damper, it is characterised in that: the carbon packing ring (5) The other side is disposed with support ring (6), which is high temperature resistant copper component.

4. the valve rod sealing member according to claim 1 for fire resisting damper, it is characterised in that: the elastic parts includes V Shape spring (2), the main seal ring (3) are disposed with the limiting section (33) abutted with V-arrangement spring (2) the open-mouth both ends.

5. the valve rod sealing member according to claim 4 for fire resisting damper, it is characterised in that: the main seal ring (3) is met It is disposed with gland (1) to the side of pressure, which, which has, gos deep into the annular groove (31) and be resisted against the V-arrangement bullet The pressure ring (11) of spring (2).

6. the valve rod sealing member according to claim 1 for fire resisting damper, it is characterised in that: each sealing lip (32) Cross section semicircular in shape or triangle are trapezoidal or fan-shaped.

7. the valve rod sealing member according to claim 1 for fire resisting damper, it is characterised in that: main seal ring (3) back It is connected with auxiliary sealing ring to the end face of pressure, the carbon packing ring (5) connect with the auxiliary sealing ring, which includes extremely A few V-ring (4), the inner peripheral surface and outer peripheral surface of the V-ring (4) are arranged with lip body (41).

8. the valve rod sealing member according to claim 7 for fire resisting damper, it is characterised in that: main seal ring (3) cloth It is equipped with the first annulus tapering towards the auxiliary sealing ring, an end face of the auxiliary sealing ring is disposed with bores with first annulus The second slot that portion matches, the carbon packing ring (5) are disposed with the first slot towards the auxiliary sealing ring, the auxiliary sealing ring Other end be disposed with the second annulus tapering to match with first slot.