CN202451859U

CN202451859U - High temperature and pressure middle flange seal valve

Info

Publication number: CN202451859U
Application number: CN2011205351398U
Authority: CN
Inventors: 季克寅
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2012-09-26
Anticipated expiration: 2021-12-20

Abstract

The utility model relates to a high temperature and pressure middle flange seal valve which comprises a valve body and a bonnet, wherein the bonnet and the valve body are in flange connection, the flange connection adopts a tongue and groove face flange structure, middle flange sealing elements are arranged in grooves of the tongue and groove face flange structure, one or a plurality of pairs of tongue-and-grooves of the tongue and groove face flange structure is/are arranged, when more than one pair of the tongue-and-grooves is arranged, the heights/depths of the tongues/grooves on the bonnet are the same or different, and the groove/tongues on the valve body are correspondingly arranged with the tongues/grooves on the bonnet. The valve not only prevents sealing elements from directly contacting with the medium and prevents the medium from corroding the sealing elements, but also prevents the sealing elements from generating cold flow under the high pressure environment, so the sealing effect of the middle flange seal valve is effectively improved, and the sealing stability and durability in the high temperature and pressure environment are particularly improved.

Description

Flange seal valve in the HTHP

Technical field

The utility model relates to a kind of valve, especially a kind of middle flange seal valve that can be used for high temperature, high pressure.

Background technique

Usually people have relatively high expectations for the sealability of valve, comprise the medium inlet and the sealing of media outlet place with the pipeline enclosure that is connected valve of valve, and the while is also to certain requirement that is sealed with of the valve gap position of valve; Usually seal through Sealing is set between the valve gap of existing valve and valve body, but Sealing all directly contacts (side that is Sealing directly is exposed to valve pocket) with medium, for general working environment or general medium; This kind sealing configuration can be competent at; But when the working environment of valve or media environment are relatively more abominable, often can not be suitable for, like high temperature, high pressure, Korrosionsmedium etc., because Sealing can directly contact with medium usually; Easy and medium reacts and is damaged; And the cold flow of Sealing takes place easily, cause the Sealing can't resilience, be unfavorable for the lasting of sealing effect; Especially operating ambient temperature changes more greatly or repeatedly the time, the problem that medium is revealed takes place very easily outside the valve gap position.

The model utility content

In order to overcome the above-mentioned defective of existing technology; The purpose of the utility model is to provide flange seal valve in a kind of HTHP; The valve of the utility model can avoid medium to contact with the direct of Sealing; Help guaranteeing that Sealing is difficult for and the medium reaction, and can effectively prevent cold flow, can guarantee better, more lasting sealability.

The technological scheme that the utility model adopts is:

Flange seal valve in a kind of HTHP; Comprise valve body and valve gap; Said valve gap is that flange is connected with valve body; What said flange connected employing is the tongue and groove flange structure, flange seal spare in being provided with in the groove of said tongue and groove flange structure, and said middle flange seal spare is as the sealing between valve gap and the valve body.

The tongue-and-groove of said tongue and groove flange structure can be for a pair of or some right; When tongue-and-groove when a pair of; The height of the tenon on the said valve gap is identical or different, and the degree of depth of the groove on the said valve gap is identical or different, the corresponding setting of tenon/groove on the groove/tenon on the said valve body and the said valve gap.

Preferably, said tenon is located on the valve gap, and said groove correspondingly is located on the valve body.

Flange seal spare is preferably the elastic packing pad in said.

All can be used for the middle flange seal valve of above-mentioned any structure stop valve, safety check and throttle valve and existing technology descend to the mortal world to relate to and adopt the flange Connecting format to connect all kinds of valves that this joint simultaneously need seal between each one of valve body.

Be preferably, said valve also comprises valve seat, flap, valve rod and stem guiding spare, and said valve seat is fixed in the valve pocket of said valve body; Directly constitute or pass through the sealing pair of the said valve of the indirect formation of Sealing with said flap, said valve gap is provided with valve cover hole, and said valve rod passes said valve cover hole; It is spiro rod section that said valve rod is positioned at the outer part of said valve pocket all the time; Remaining part is the polished rod section, and the end of said polished rod section links to each other with said flap, the said flap On/Off valve that under the drive of said valve rod, matches with said valve seat; Be filled with the filler that is used to seal between said valve rod and the valve gap; The top of said filler compresses through Gland, and said Gland is fixed through Gland hold-down bolt and valve gap, and said stem guiding spare is fixedly connected with valve gap through support; Be socketed with in the said stem guiding spare can be with it Stem Mut in relative rotation, the internal thread of said Stem Mut matches with the outside thread of spiro rod section and is used for the driving of valve rod.

Be preferably, the internal thread of said Stem Mut and the outside thread of said spiro rod section can be the trapezoidal thread of working in coordination.

Be preferably, said Stem Mut is a T type nut, and said T type nut is flush-mounted in the said stem guiding spare greatly upside down; The trapezoidal thread portion provided thereon of said T type nut, its underpart is not for establishing the unthreaded hole of screw thread, and said valve also comprises handwheel; Said handwheel sleeve is connected on the top of said T type nut; And being provided with the limiting stopper that is used to guarantee that the two rotates synchronously in the two, the top latter end of said T type nut is provided with outside thread, the cover connected nut that is threaded on it and is useful on the said handwheel of axial restraint.

The beneficial effect of the utility model is:

Because the utility model has adopted the flange of tenon groove structure to connect valve gap and valve body; Effectively improved the two sealing effect and join strength, particularly Sealing has been placed the groove of tenon groove structure, both avoided Sealing to contact with the direct of medium; Especially avoided medium washing away to Sealing; Reduce probability and reaction velocity that medium and Sealing react, caused the problem of Sealing generation cold flow when having avoided valve under hyperbaric environment, to use again easily, effectively improved the sealing effect of valve gap and valve body joint; Especially improve the stability and the endurance of sealing, therefore gone for the working environment of high temperature, high pressure.

Description of drawings

Fig. 1 is the structural representation of existing middle flange seal valve;

Fig. 2 is the partial enlarged drawing of the position I of Fig. 1;

Fig. 3 is the structural representation (closed condition) of flange seal valve in the HTHP of the utility model;

Fig. 4 is the structural representation (opening state) of flange seal valve in the HTHP of the utility model;

Fig. 5 is the partial enlarged drawing of the position I I of Fig. 3 and Fig. 4.

Embodiment

, through embodiment the utility model is described in more detail the utility model in order better to explain below in conjunction with accompanying drawing so that better understand.

Fig. 1 and Fig. 2 are existing middle flange seal valve, comprise valve body 1, flap 4, valve gap 8, valve rod 10, handwheel 15, are provided with valve seat in the valve body; Be provided with the Sealing of common formation valve seal secondary 5 on valve seat and the flap separately; Said valve gap is fixedly connected on the valve body top through middle secure bolt 9, is between the fitting surface of the two ribbet (be that the middle part that valve gap is stated in the two fitting surface place is provided with convexity, the relevant position of valve body is provided with depression); Be generally single tongue and groove and flange seal spare 7 in said ribbet is provided with near the position of valve pocket; As shown in the figure, said concave inside is not established annular wall, and middle flange seal spare is exposed in the valve pocket near the inner ring surface of valve pocket.One end of valve rod is connected with flap, and can drive flap and move up and down, with the On/Off valve; The other end of valve rod passes outside the valve pocket through the valve cover hole at valve gap middle part, and passes stem guiding spare, and the epimere of valve cover hole is provided with stuffing box; And be filled with sealing with filler 11, and the filler top is provided with Gland 12, and said Gland is fixed on the valve gap through Gland hold-down bolt 13; Guarantee sealing effect to compress filler, said stem guiding spare is fixedly connected with valve gap through support, be provided with in the stem guiding spare can be with it in relative rotation Stem Mut 14 (like T type nut) cooperate with the spiro rod section of valve rod; Rotation with through Stem Mut comes actuate valve stem along its axial moving linearly to the screw thread output drive strength square of the spiro rod section of valve rod; Said T type nut stub end is socketed in the said stem guiding spare down, and little head end is socketed with said handwheel, and the two realizes rotating synchronously through limiting stopper; The handwheel top is provided with the cover connected nut 16 that is connected with T type nut thread, is used to compress handwheel.

During actual the use, medium gets into valve pocket through valve inlet 3, flows out through valve export 2, and when flap rose under the lifting of valve rod, medium got in the lumen 6 of valve.In structure shown in Figure 1, the inboard of middle flange seal spare directly is exposed to lumen, has no protective equipment; With directly receiving washing away of medium, therefore, middle flange seal spare 7 be with lumen in medium directly contact; The corrosion of medium centering flange seal spare is comparatively serious, the sealability of flange position in the influence, simultaneously; Owing to have no limit stoper between middle flange seal spare and the lumen; Therefore cold flow takes place easily, more obvious when especially pressure medium is higher, the sealability of flange position in having a strong impact on.

Referring to Fig. 3 to Fig. 5; The utility model provides flange seal valve in a kind of HTHP; Comprise valve body 1 and valve gap 8, said valve gap is that flange connects (" middle flange " in " flange " in " flange connection " promptly corresponding " middle flange seal valve ") with valve body, and what said flange connected employing is the tongue and groove flange structure; Flange seal spare 7 in being provided with in the groove of said tongue and groove flange structure is used for the sealing between valve gap and the valve body.Because said groove has two sidewalls; Therefore the said middle flange seal spare that can avoid being put in wherein directly contacts with medium; Reduce medium to its wash away and corrode, effectively avoid said in flange seal spare generation cold flow, improve the stability and the endurance that seal.

The tongue-and-groove of said tongue and groove flange structure can be for a pair of or some right, concrete quantity look sealing area size and mechanical strength height and decide.When tongue-and-groove when a pair of, the height of the tenon on the said valve gap is identical or different, the degree of depth of the groove on the said valve gap is identical or different, the corresponding setting of tenon/groove on the groove/tenon on the said valve body and the said valve gap.For example, can on valve gap, be provided with N highly identical or different tenon, and correspondence is provided with N groove on valve body; One tenon, one groove can be set on valve gap, and correspondence is provided with a groove one tenon on valve body; Can on valve gap, set gradually a tenon one groove one tenon from inside to outside, the height of two tenons is identical or different, and correspondence is provided with a groove one tenon one groove on valve body; Can on valve gap, set gradually a groove one tenon one groove from inside to outside, the degree of depth of two grooves is identical or different, and correspondence is provided with a tenon one groove one tenon on valve body.

Preferably, said tenon is located on the valve gap, and said groove correspondingly is located on the valve body, to guarantee the stable of Sealing, avoids coming off, and is convenient to assembling, replacing and the maintenance of valve.

The quantity of flange seal spare can be one or several in said, when more than one, can superpose each other, also can the classification setting, and both from inside to outside settings one by one are to obtain better sealing effect.

Flange seal pad during flange seal spare is preferably in said, the cross section of said elastic packing pad preferably is zigzag, also can select the Sealing of other suitable sectional shapes according to actual sealing effect for use.

Said valve gap and valve body can be through dismountable being fixed together of clamping bolt (like middle secure bolt 9), so that dismounting, replacing, maintenance etc.

All can be used for the middle flange seal valve of aforesaid any structure stop valve, safety check and throttle valve and existing technology descend to the mortal world to relate to and adopt the flange Connecting format to connect all kinds of valves that this joint simultaneously need seal between each one of valve body.

Preferably, said valve also comprises valve seat 1, flap 4, valve rod 10 and stem guiding spare, and said valve seat is fixed in the valve pocket of said valve body; Directly constitute or pass through the sealing pair 5 of the said valve of the indirect formation of Sealing with said flap; Said valve gap is provided with valve cover hole, and said valve rod passes said valve cover hole, and it is spiro rod section that said valve rod is positioned at the outer part of said valve pocket all the time; Remaining part is the polished rod section; The end of said polished rod section links to each other with said flap, the said flap On/Off valve that can be under the drive of said valve rod matches with said valve seat, and the epimere of said valve cover hole is provided with stuffing box; Wherein be filled with the filler 11 that is used for valve rod and valve cover chamber sealing; The top of said filler compresses through said Gland 12, and said Gland is fixed through Gland hold-down bolt 13 and valve gap, and said stem guiding spare is fixedly connected with valve gap through support; Be socketed with in the said stem guiding spare can be with it Stem Mut 14 in relative rotation, the internal thread of said Stem Mut matches with the outside thread of spiro rod section and is used for the driving of valve rod.Said stem guiding spare, support and valve gap both can be splits, also can be (like Fig. 3, shown in 4) of one, for example can directly cast as a whole.The outlet 2 of said valve can be respectively equipped with outlet(discharge) flange and inlet flange with inlet 3, is used for the installation of valve, and said outlet(discharge) flange and inlet flange can be the flange that is threaded, so that dismounting.

Preferably, the internal thread of said Stem Mut and the outside thread of said spiro rod section can be the trapezoidal thread of working in coordination, and to guarantee effective transmission of moment, have improved the mechanical property of screw thread and the stability of transmission of torque.

Said Stem Mut is preferably T type nut, and said T type nut is flush-mounted in the said stem guiding spare greatly upside down, is beneficial to relatively rotating of the two, and helps keeping the stabilized driving of valve rod.

Be preferably, provided thereon of the trapezoidal thread of the said T type nut part of stub end (promptly away from), its underpart is not for establishing the unthreaded hole of screw thread, and said unthreaded hole can be used for the guiding of valve rod, to improve the steering capability to valve rod, keeps the stabilized driving of valve rod.

Be preferably, said valve also comprises handwheel 15, and said handwheel sleeve is connected on the top of said T type nut, and guarantees the two synchronous rotation through the limiting stopper of being located at the two.For example, said handwheel can be connected with said T type nut key.

The top latter end of said T type nut can be provided with outside thread, and compresses said handwheel through the outside thread scyewed joint that is socketed on its outside cover connected nut 16 and said T type nut.

During actual the use, medium gets into valve pocket through valve inlet, flows out through valve export, when flap rises under the lifting of valve rod; Medium gets in the lumen 6 of valve, at this moment, because middle flange seal spare is located in the groove; Not directly towards lumen, therefore, middle flange seal spare can directly not contact with medium in the lumen; Alleviate the corrosion of medium centering flange seal spare, improved the sealability of middle flange position, simultaneously; Because middle flange seal spare received the spacing of cell wall, even the pressure that middle flange seal spare receives cold flow can not take place when big yet, even flange seal spare is stable in also can guaranteeing when pressure medium is higher.

The flange seal valve has adopted the tongue and groove flange structure to connect valve body and valve gap in the HTHP of the utility model; And in the groove of tenon groove structure, Sealing is set; Both avoided Sealing to contact, avoided the corrosion of medium, avoided again at hyperbaric environment lower seal generation cold flow to Sealing with the direct of medium; Effectively improve the sealing effect of middle flange seal valve, especially improved sealing stability and the endurance under the high temperature and high pressure environment.

Claims

1. flange seal valve in the HTHP is characterized in that comprising valve body and valve gap, and said valve gap is that flange is connected with valve body, and it is the tongue and groove flange structure that said flange connects what adopt, flange seal spare in being provided with in the groove of said tongue and groove flange structure.

2. flange seal valve in the HTHP according to claim 1; The tongue-and-groove that it is characterized in that said tongue and groove flange structure is a pair of or some right; When tongue-and-groove when a pair of; The degree of depth of the height/groove of the tenon on the said valve gap is identical or different, the corresponding setting of tenon/groove on the groove/tenon on the said valve body and the said valve gap.

3. flange seal valve in the HTHP according to claim 2 is characterized in that said tenon is located on the valve gap, and said groove correspondingly is located on the valve body.

4. flange seal valve in the HTHP according to claim 3 is characterized in that said middle flange seal spare is the elastic packing pad.

5. flange seal valve in the HTHP according to claim 4, the cross section that it is characterized in that said elastic packing pad is a zigzag.

6. flange seal valve in the HTHP according to claim 5 is characterized in that said valve gap is fixedly connected through clamping bolt is dismountable with valve body.

7. according to flange seal valve in the described HTHP of arbitrary claim among the claim 1-6, it is characterized in that the type of said valve comprises stop valve, safety check and throttle valve.

8. flange seal valve in the HTHP according to claim 7; It is characterized in that said valve also comprises valve seat, flap, valve rod and stem guiding spare, said valve seat is fixed in the valve pocket of said valve body, directly constitutes or pass through the sealing pair of the said valve of the indirect formation of Sealing with said flap; Said valve gap is provided with valve cover hole; Said valve rod passes said valve cover hole, and it is spiro rod section that said valve rod is positioned at the outer part of said valve pocket all the time, and remaining part is the polished rod section; The end of said polished rod section links to each other with said flap; The said flap On/Off valve that under the drive of said valve rod, matches with said valve seat is filled with the filler that is used to seal between said valve rod and the valve gap, the top of said filler compresses through Gland; Said Gland is fixed through Gland hold-down bolt and valve gap; Said stem guiding spare is fixedly connected with valve gap through support, be socketed with in the said stem guiding spare can be with it Stem Mut in relative rotation, the internal thread of said Stem Mut matches with the outside thread of spiro rod section and is used for the driving of valve rod.

9. flange seal valve in the HTHP according to claim 8 is characterized in that the internal thread of said Stem Mut and the outside thread of said spiro rod section are the trapezoidal thread of working in coordination.

10. flange seal valve in the HTHP according to claim 9; It is characterized in that said Stem Mut is a T type nut, said T type nut is flush-mounted in the said stem guiding spare greatly upside down, the trapezoidal thread portion provided thereon of said T type nut; Its underpart is not for establishing the unthreaded hole of screw thread; Said valve also comprises handwheel, and said handwheel sleeve is connected on the top of said T type nut, and is provided with the limiting stopper that is used to guarantee the two synchronous rotation in the two; The top latter end of said T type nut is provided with outside thread, the cover connected nut that is threaded on it and is useful on the said handwheel of axial restraint.