CN208619705U - Bidirection press self-balance stop valve - Google Patents

Abstract

The utility model discloses a kind of bidirection press self-balance stop valve, including valve body, valve pocket is set in valve body, flap is set in valve pocket, compressing member is arranged in flap upper end；Valve body upper end is provided with valve deck；Valve rod is provided on valve deck, valve rod one end is pierced by valve deck, and the other end connects flap；Balance hole is set on flap or valve rod；The circumference of valve pocket lower part is equipped with the adjustment hole for flow of media；Composite sealing ring is set on the flap, and the composite sealing ring successively includes pressure ring, blocks circle, upper gasket, upper seal, upper isolating ring, lower isolating ring and lower seal from top to bottom.Compared with existing truncation class valve, operate the light, break-in facility with two-way high-temperature high-pressure medium, the new spool of energy quick-replaceable as needed, solves existing valve, especially welding class big orifice high temperature and pressure block valve occur in leakage after can not on-line maintenance international problem, so that it is widely used in the high temperature and pressure of two-way flow and a variety of corrosive media environment.

Description

Bidirection press self-balance stop valve

Technical field

The utility model relates to a kind of valve, more particularly to it is a kind of be suitable under high temperature, high pressure or corrosive environment, as cutting Bidirection press self-balance stop valve that is disconnected or connecting two-way flow medium pipeline.

Background technique

Valve is indispensable important mechanical production on the pressure pipelines such as petrochemical industry, oil field, metallurgy, thermoelectricity, nuclear power and naval vessel Product, due in the use process of existing valve gate technology product, on the one hand, must overcome the pressure medium ability born on opening and closing element Opening/shutting valve, when valve is for high temperature, high pressure and big orifice pipeline, pressure medium not only causes valve opening and closing very difficult, Also the damage and leakage of valve sealing face are easily caused；On the other hand, valves leakage situation is very universal, due to high temperature high pressure valve Door is connected on pipeline with welding manner, and on-line maintenance can not be carried out after prior art valve leak, can only be by pipeline It carries out cutting again and welds new valve again, valve maintenance time-consuming, effort and cost.

Pressure self-balancing valve can make to act on the pressure medium self-balancing on opening and closing element by pressure self-balancing principle, It is inherently eliminated influence of the pressure medium to valve operation performance, airtight quality and sealing life etc..Pressure self-balancing Valve is the important channel of existing valve products transition and upgrade, and realize pressure self-balancing shut-off valve key technology be to pressure from The sealing of balanced structure.The sealing technique of existing pressure self-balancing structure generallys use the progress of the sealing rings such as " O " type, Y-shaped Sealing, since pressure medium can be converted into sealing ring to the pressure self-sealing of medium, so that sealing by such sealing technique The seal preload of circle is not necessarily to that extraordinary sealing effect can be obtained greatly very much, and in the use process of sealing ring, sealing ring Sealing effect it is not only unrelated with the height of pressure medium, but also do not change with the decline of seal preload after ring wear Become, therefore there is persistently reliable airtight quality and sealing life.Due to can be used in making the sealing such as " O " type, Y-shaped at present The high density elastic material of circle is the rubber of non-refractory, plastics etc., so that existing pressure self-balancing shut-off valve is only applicable to 200 DEG C of media environments below, and the various lots of high temperature pressure pipeline such as be not used to steam.

Utility model patent (ZL201410038107.5) high temperature and pressure self-balancing tune of application in utility model people 2014 Save valve, be it is a kind of adjust and completely cut through the high temperature and pressure self-balancing regulating valve of function with flow, by using low-density, resistance to High temperature or corrosion resistant sealing material, such as soft graphite etc. can be also similar to " O " type, the pressure of Y-shaped sealing ring certainly Sealing characteristics make it have persistently reliable airtight quality and sealing life, especially for up to 650 DEG C of high temperature and pressure ring Under border, it still is able to realize the function that medium is completely cut through, it is real by being arranged sealing ring, packing washer and flap in valve pocket Valve core replaceable is showed.Since the patent sealing structure is suitable for that the pressure medium entered from valve body down channel is truncated, not Consider the pressure medium that truncation enters from valve body upper run, constrains the larger range of application of the patent.

Utility model content

Purpose of utility model: in order to overcome the deficiencies in the prior art, the utility model provides a kind of bidirection press Self-balance stop valve.

Technical solution: in order to solve the above technical problems, a kind of bidirection press self-balance stop valve of the utility model, including Valve body, valve body is interior to be arranged valve pocket, flap is arranged in valve pocket, compressing member is arranged in flap upper end；Valve body upper end is provided with valve deck；Valve deck On be provided with valve rod, valve rod one end is pierced by valve deck, and the other end connects flap；Balance hole is set on flap or valve rod；Under valve pocket The circumference in portion is equipped with the adjustment hole for flow of media；Composite sealing ring is set on the flap, and the composite sealing ring is certainly Successively include pressure ring under above, block circle, upper gasket, upper seal, upper isolating ring, lower isolating ring and lower seal.

Wherein, the shape of the lower end surface of the pressure ring and the upper surface of the upper gasket is that direction squeezes blocking into flap The shape of the upper surface of circular conical surface, inclined-plane, plane or the spherical surface of circle, the lower end surface of the upper gasket and the upper isolating ring is to valve Valve outside direction squeezes circular conical surface, inclined-plane or the spherical surface of upper seal, the upper surface of the lower end surface of the lower isolating ring and the flap Shape be to flap outside direction squeeze lower seal circular conical surface, inclined-plane or spherical surface.

Wherein, the pressure ring of composite sealing ring, blocking circle, upper gasket, upper seal, upper isolating ring, lower isolating ring and lower seal It can be separately positioned in one or more ring-shaped grooves on the flap.

Wherein, the inner circle clearance fit of the outer circle of the upper gasket, upper isolating ring, lower isolating ring and flap and the valve pocket.

Wherein, there is gap between the lower end surface of the upper isolating ring and the upper surface of lower isolating ring.

Wherein, the blocking circle, upper seal and lower seal are made of soft graphite or polytetrafluoroethylene material.

Wherein, the pressure ring, upper gasket, upper isolating ring and lower isolating ring are made of high temperature resistant or corrosion resistant rigid material, The rigid material is metal or ceramics.

Wherein, the secondary sealing area with the valve pocket gluing, sealing is provided on the flap, shape is plane, circular cone Face or spherical surface.

Wherein, the primary sealing area with the flap gluing, sealing is provided on the valve pocket, shape is plane, circular cone Face or spherical surface.

The utility model has the advantages that a kind of bidirection press self-balance stop valve of the utility model, has the advantages that

1, the pressure self-sealing structure of the utility model, so that using low-density, high temperature resistant or corrosion resistant sealing material, Such as soft graphite etc., it can be also similar to " O " type, the pressure self-sealing characteristic of Y-shaped sealing ring, make it have and persistently may be used The airtight quality leaned on and sealing life, the technology for fundamentally solving pressure self-balancing shut-off valve for high-temperature medium environment are difficult Topic, so that the utility model product is widely used in the truncation or unlatching of two-way flow high-temperature high-pressure medium within 850 DEG C；Together When, using corrosion resistant sealing material, such as polytetrafluoroethylene (PTFE) etc., pressure self-sealing characteristic can be similarly obtained, and be applicable in In a variety of corrosive media environments；

2, the pressure self-balancing structure of the utility model, so that the pressure medium self-balancing born on flap, valve operation Very easily, the manual operation labor intensity of manually-operated gate is not only reduced, and significantly reduce electronic, operated pneumatic valve auxiliary Plant energy consumption is helped, application of the shut-off valve on big orifice high-temperature and pressure pipeline has also greatly been widened；

3, the two-way amputated structure of the utility model, the safety being able to solve in valve practical application, such as: to pot The high pressure valve that must be configured before the high-pressure hydraulic pump of the moisturizings such as furnace, mine, oil well needs Open valve to make when water pump supplies water Water supply line is unobstructed, and when water pump stops supplying water, but need to close valve prevent for high pressure water refluence, for another example steam power plant In power generation process, the high temperature and high pressure steam that need to generate multiple boilers is sent by high pressure valve shares in main pipe respectively, when stopping When stop divides boiler to supply, also need to close reflux of the valve to prevent high temperature and high pressure steam；Petrochemical industry, oil in practical application The pipe-line systems such as field, metallurgy or power plant are usually present the high-temperature and pressure pipeline of a large amount of two-way flow；

4, the valve core replaceable structure of the utility model, spool is arranged in valve body, by setting between valve pocket and valve body The removable seal group set is combined into an entirety, so that spool is replaced very convenient online, solves existing valve, especially Weld class big orifice high temperature and pressure block valve occur in leakage after can not on-line maintenance problem.

The utility model has passed through a large amount of two-way high temperature and pressure sealing performance and failtests and high temperature and pressure pipe The practical application in road experiments have shown that, the utility model has fairly obvious technical advantage compared with existing valve, has very Wide application prospect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model bidirection press self-balance stop valve；

Fig. 2 is the partial enlarged view of Fig. 1；

Fig. 3 is the power schematic diagram that is squeezed when upper seal pre-tightens；

Fig. 4 is the pressure medium self-sealing stress diagram of upper seal；

Fig. 5 is the pressure medium self-sealing stress diagram of lower seal.

Specific embodiment

With reference to the accompanying drawing, technical solutions of the utility model are described in detail, but the protection model of the utility model It encloses and is not limited to the embodiment.

As shown in Figure 1 and Figure 2, bidirection press self-balance stop valve described in the utility model, including valve body 1, valve deck 20, valve Bar 21 and spool；Upper channel 3, lower channel 37 are provided in the valve body 1；The spool is by valve pocket 7 and is arranged in valve pocket 7 Interior flap 6, compressing member 17, balance hole 23 and composite sealing ring composition；The spool is arranged in the cavity of the valve body 1, The removable seal 19,36 being arranged between valve pocket 7 and valve body 1；The circumference of 7 lower part of valve pocket, which is equipped with, is used for medium flow field Logical adjustment hole 5 is provided with the primary sealing area 4 with the flap 6 sealing on the upper surface of the internal channel 38 of valve pocket 7, Shape is plane, circular conical surface or spherical surface；The flap 6 is arranged in the cavity of the valve pocket 7, sets on the lower end surface of flap 62 There is the secondary sealing area 35 with the valve pocket 7 sealing, shape is plane, circular conical surface or spherical surface；The compressing member 17 passes through spiral shell The top of the flap 6 is arranged in line；The valve deck 20 is fixedly connected with the valve body 1；The valve rod 21 passes through the valve deck 20, lower end is actively coupled with the flap 6, and valve rod 21 can carry flap 6 and move up and down in the cavity of valve pocket 7, shape At opening or closing for the utility model；The balance hole 23 is arranged on the flap 6 or the valve rod 21, makes to be placed in flap 7 lower channel 38 of valve pocket of 6 lower end surface, 2 lower section is linked up with 7 epicoele 22 of valve pocket for being placed in 6 upper surface of flap, 18 top；The flap 6 In the ring-shaped groove of upper composition, be provided with high temperature resistant or corrosion resistant composite sealing ring, the composite sealing ring from top to bottom according to Secondary includes pressure ring 24, blocking circle 15, upper gasket 12, upper seal 11, upper isolating ring 10, lower isolating ring 9 and lower seal 8；The resistance Disconnected circle 15, upper seal 11 and lower seal 8 are made of sealing material, can according to need using different sealing materials, The present embodiment is in order to reach purpose resistant to high temperature, and the sealing material used is soft graphite；The pressure ring 24, upper gasket 12, on Spacer ring 10 and lower isolating ring 9 are made of metal material, the inner circle clearance fit with the valve pocket 7；The lower end surface of the pressure ring 24 16 and the upper gasket 12 upper surface 13 shape be into the flap 6 direction squeeze it is described block circle 15 circular conical surface, Inclined-plane, plane or spherical surface, the purpose is to make the lower end surface 16 of pressure ring 24 and the upper end of upper gasket 12 by screwing compressing member 17 The direction into flap 6 squeezes blocking circle 15 jointly in face 13, and truncation is blocked between circle 15 and the circumferential surface 14 of flap 6 and blocked Medium channel between circle 15 and the upper surface 13 of upper gasket 12；The lower end surface 25 of the upper gasket 12 and the upper isolating ring 10 The shape of upper surface 28 is circular conical surface, inclined-plane or the spherical surface that the upper seal 11 is squeezed to 6 outside direction of flap, purpose It is to make upper gasket 12 and upper isolating ring 10 jointly outwardly against upper seal 11 by screwing compressing member 17, and in upper seal 11 Outer round surface 27 obtain the seal preload bigger compared with its internal circular surfaces 26, convenient for medium along the lower end surface of upper isolating ring 10 29 with Gap between gap and 10 inner circle of upper isolating ring and flap 6 between the upper surface 30 of lower isolating ring 9 penetrate into pretightning force it is lesser on The internal circular surfaces 26 of sealing ring 11 form outward direction and squeeze, and force the outer round surface 27 of upper seal 11 and the inner circle of valve pocket 7 It is further adjacent to, constitutes upper seal 11 to the pressure self-sealing of valve pocket 7；Similarly, the lower end surface 31 of the lower isolating ring 9 and described The shape of the upper surface 34 of flap 6 is circular conical surface, inclined-plane or the spherical surface that the lower seal 8 is squeezed to 6 outside direction of flap, The purpose is to make lower isolating ring 9 and flap 6 jointly outwardly against lower seal 8 by screwing compressing member 17, and in lower seal 8 Outer round surface 32 obtain the seal preload bigger compared with its internal circular surfaces 33, convenient for medium along the lower end surface of upper isolating ring 10 29 with Gap between gap and 9 inner circle of lower isolating ring and flap 6 between the upper surface 30 of lower isolating ring 9 penetrate into pretightning force it is lesser under it is close The internal circular surfaces 33 of seal 8 form outward direction and squeeze, and the inner circle of the outer round surface 32 and valve pocket 7 that force lower seal 8 is into one Step is adjacent to, and constitutes lower seal 8 to the pressure self-sealing of valve pocket 7.

Make pressure ring 24 and upper gasket 12 the direction extruding blocking circle 15 into flap 6 jointly by screwing compressing member 17, cuts It is disconnected to block between circle 15 and the circumferential surface 14 of flap 6 and block the medium between circle 15 and the upper surface 13 of upper gasket 12 logical Road；Upper gasket 12 and upper isolating ring 10 jointly outwardly against upper seal 11, and the outer round surface of upper seal 11 27 obtain compared with The bigger seal preload of its internal circular surfaces 26, the stress diagram of upper seal 11 are as shown in Figure 3.

Similarly, make lower isolating ring 9 and flap 6 jointly close outwardly against lower seal 8, and under by screwing compressing member 17 The outer round surface 32 of seal 8 obtains the seal preload bigger compared with its internal circular surfaces 33.

The working principle of the utility model is as follows: after the shut-off valve of the utility model couples with pressure pipeline, working as shut-off valve Secondary sealing area 35 and 7 internal channel upper end of valve pocket when being in close state, under the promotion of valve rod 21, on 6 lower end surface of flap Primary sealing area 4 on face is adjacent to composition sealing.The pressure self-balancing principle of medium are as follows: if medium enters from lower channel, be situated between While matter pressure acts on the lower end surface of flap 6, valve pocket 7 is transferred to further through set balance hole 23 on flap 6 or valve rod 21 Epicoele and the upper surface for acting on flap 6 are axially formed the axial force that a pair is contrary, cancels out each other along flap 6, realize Pressure self-balancing of the medium to flap 6；If medium enters from upper channel, pressure medium acts on the outer round surface of flap 6 It is upper to form the radial force cancelled out each other, medium is realized to the pressure self-balancing of flap 6.The utility model is in the open state When, under the pulling of valve rod 21, flap 6 is raised adjustment hole 5 of the medium on valve pocket 7 and flows out, until fully opening valve.

The medium pressure of sealing ring when the utility model shut-off valve is in close state is described in detail in two kinds of situation below Power self-sealing principle:

One, when pressure medium enters from 1 upper channel of valve body, pressure medium self-sealing principle is as shown in Figure 4:

By the adjustment hole 5 on valve pocket 7, the gap between 7 inner circle of valve pocket and flap 6 flows up pressure medium, squeezes The outer round surface for crossing lower seal 8, upper surface and the upper isolating ring in gap and lower isolating ring 9 between 9 outer circle of lower isolating ring and valve pocket 7 The lesser upper sealing of pretightning force is penetrated into the gap between gap and 10 inner circle of upper isolating ring and flap 6 between 10 lower end surface The internal circular surfaces of circle 11 form outward direction and squeeze, and the outer round surface of upper seal 11 and the inner circle of valve pocket 7 is forced further to paste Tightly, constitute upper seal 11 to the pressure self-sealing of valve pocket 7, at the same flow into 9 upper surface of lower isolating ring and 10 lower end surface of upper isolating ring it Between medium, then along upper isolating ring 10 lower end surface formed upward direction squeeze, force the lower end of upper seal 11 Yu upper gasket 12 Face is further adjacent to, and is constituted upper seal 11 to the pressure self-sealing of upper gasket 12, is also forced upper surface and the resistance of upper gasket 12 Disconnected circle 15 is further adjacent to, 15 inner circles of circle and flap 6 is blocked further to be adjacent to, and constitutes and blocks 15 pairs of upper gaskets 12 of circle and flap 6 Pressure self-sealing.

The outer round surface of the utility model upper seal 11 mainly passes through Jie to the sealing force of the internal circular surfaces of valve pocket 7 Matter pressure is formed in the internal circular surfaces of upper seal 11 and is squeezed, and then on the outer round surface of upper seal 11 and 7 inner circle of valve pocket It forms medium and is adjacent to power, be the self-sealing power formed by pressure medium itself since the medium is adjacent to power, and with pressure medium Raising and it is further reliable, sealing effect is not only unrelated with the height of pressure medium, also the outer round surface with upper seal 11 It is unrelated to the size of the seal preload of 7 inner circle of valve pocket, solve the pass that pressure medium self-sealing is carried out using heat-resisting material It is close to will lead to the utility model although also achieving abrasion of 7 internal circular surfaces of valve pocket to 11 outer round surface of upper seal for key technology The decline of pretightning force is sealed, but without the decline for leading to the utility model sealing effect.Therefore, the utility model is not to pass through letter Single setting part and sealing element is squeezed to realize sealing, and the utility model only need to be by suitably screwing compressing member, upper On the outer round surface of sealing ring 11 and the internal circular surfaces of valve pocket 7, the seal preload for being much smaller than pressure medium is obtained, can be obtained Persistently reliable airtight quality and sealing life.

Two, when pressure medium enters from valve body lower channel, pressure medium self-sealing principle is as shown in Figure 5:

Pressure medium is transferred to 7 epicoele of valve pocket by set balance hole 23 on flap 6 or valve rod 21, then along upper gasket 12 with Gap between 7 inner circle of valve pocket flows downward, and squeezes through the outer round surface of upper seal 11, along 10 outer circle of upper isolating ring and valve pocket 7 it Between gap and upper isolating ring 10 lower end surface and lower isolating ring 9 upper surface between gap and 9 inner circle of lower isolating ring and flap 6 it Between gap, penetrate into lesser 8 internal circular surfaces of lower seal of pretightning force and form outward direction and squeeze, force the outer of lower seal 8 The inner circle of circular surfaces and valve pocket 7 is further adjacent to, and constitutes lower seal 8 to the pressure self-sealing of valve pocket 7, while flowing into upper isolating ring Medium between 10 and lower isolating ring 9 is then formed along the upper surface of lower isolating ring 9 to be squeezed in downward direction, forces lower seal 8 and flap 6 Upper surface be further adjacent to, constitute lower seal 8 to the pressure self-sealing of flap 6.

Illustrate the technical performance of the utility model product below by specific detection data:

2018 are as follows to the testing result of this project valve: in valve latus rectum 175mm, seal test pressure >=35MPa, Under the conditions of duration >=60s, valve realizes zero leakage, and operational torque needed for valve is less than 200Nm, and (this is the result shows that this item Mesh valve operation torque is only the 1/20 of traditional technology valve).

The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, such as: valve pocket 7 can It is formed by one or more independent part combinations, passing through seal combination between valve pocket 7 and valve body 1 is an entirety, close The quantity and combination of sealing can also be varied, these improvements and modifications also should be regarded as the protection model of the utility model It encloses.

Claims (9)

1. a kind of bidirection press self-balance stop valve, it is characterised in that: including valve body (1), valve pocket (7) are arranged in valve body (1), valve It covers in (7) and flap (6) is set, compressing member (17) are arranged in flap (6) upper end；Valve body (1) upper end is provided with valve deck (20)；Valve deck (20) it is provided on valve rod (21), valve rod (21) one end is pierced by valve deck (20), and the other end connects flap (6), flap (6) or valve Balance hole is set on bar (21), and the circumference of valve pocket (7) lower part is equipped with the adjustment hole (5) for flow of media；The flap (6) Upper setting composite sealing ring, the composite sealing ring successively include pressure ring (24), block circle (15), upper gasket from top to bottom (12), upper seal (11), upper isolating ring (10), lower isolating ring (9) and lower seal (8).

2. bidirection press self-balance stop valve according to claim 1, it is characterised in that: the lower end surface of the pressure ring (24) (16) and the shape of the upper surface (13) of the upper gasket (12) is that the circular cone for blocking circle (15) is squeezed to the interior direction of flap (6) Face, inclined-plane, plane or spherical surface, the shape of the upper surface (28) of the lower end surface (25) and the upper isolating ring (10) of the upper gasket (12) Shape is circular conical surface, inclined-plane or the spherical surface that upper seal (11) are squeezed to flap (6) outside direction, the lower end surface of the lower isolating ring (9) (31) and the shape of the upper surface (34) of the flap (6) be to flap (6) outside direction squeeze lower seal (8) circular conical surface, Inclined-plane or spherical surface.

3. bidirection press self-balance stop valve according to claim 1, it is characterised in that: the pressure ring of composite sealing ring (24), circle (15), upper gasket (12), upper seal (11), upper isolating ring (10), lower isolating ring (9) and lower seal (8) are blocked respectively It is arranged in one or more ring-shaped grooves on the flap (6).

4. bidirection press self-balance stop valve according to claim 1, it is characterised in that: the upper gasket (12), on every The outer circle of ring (10), lower isolating ring (9) and flap (6) and the inner circle clearance fit of the valve pocket (7).

5. bidirection press self-balance stop valve according to claim 1, it is characterised in that: the lower end of the upper isolating ring (10) There is gap between face (29) and the upper surface (30) of lower isolating ring (9).

6. bidirection press self-balance stop valve according to claim 1, it is characterised in that: blocking circle (15), upper close Seal (11) and lower seal (8) are made of soft graphite or polytetrafluoroethylene material.

7. bidirection press self-balance stop valve according to claim 1, it is characterised in that: the pressure ring (24), upper gasket (12), upper isolating ring (10) and lower isolating ring (9) are made of high temperature resistant or corrosion resistant rigid material, and the rigid material is metal Or ceramics.

8. bidirection press self-balance stop valve according to claim 1, it is characterised in that: be provided on the flap (6) With the secondary sealing area (35) of the valve pocket (7) gluing, sealing, shape is plane, circular conical surface or spherical surface.

9. bidirection press self-balance stop valve according to claim 1, it is characterised in that: be provided on the valve pocket (7) With the primary sealing area (4) of the flap (6) gluing, sealing, shape is plane, circular conical surface or spherical surface.