CN207500515U - A kind of ultralow temperature forged steel gate valve - Google Patents
A kind of ultralow temperature forged steel gate valve Download PDFInfo
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- CN207500515U CN207500515U CN201721403110.8U CN201721403110U CN207500515U CN 207500515 U CN207500515 U CN 207500515U CN 201721403110 U CN201721403110 U CN 201721403110U CN 207500515 U CN207500515 U CN 207500515U
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Abstract
The utility model provides a kind of ultralow temperature forged steel gate valve, including valve body, valve seat, valve deck and valve rod.There are two valve seats, is symmetrically welded at valve inner, centre setting flashboard.Valve deck is the integral type long-neck valve deck that solid forging forms, there is stuffing-box inside the upper end of valve deck, the first packing layer, the second packing layer and third packing layer are respectively provided in stuffing-box from the bottom to top, the top installation filler pressing sleeve and hold-down grid of third packing layer, it is fixedly connected at the top of hold-down grid and valve deck, and packing layer is compressed and is sealed.Valve rod is integrally arranged among the valve body, valve deck, stuffing-box, filler pressing sleeve, hold-down grid, and the lower end of the valve rod is connected with flashboard.The inside of valve deck at 10 30mm of the bottom of stuffing-box sets upper seal support, and upper sealing pair is set on the corresponding position in periphery of valve rod, and upper seal support and upper sealing pair match, sealing structure in formation.The ultralow temperature forged steel gate valve of the utility model has excellent sealing performance and safe to use.
Description
Technical field
The utility model is related to valve technology fields, and in particular to a kind of ultralow temperature forged steel gate valve.
Background technology
With the development of China's LNG projects, the demand of cryogenic valve is increasing, and the requirement to cryogenic valve is also got over
Come stringenter.Traditional ultralow temperature forged steel gate valve is primarily present two problems：
1), interior leakage：Valve seat is used to inlay and be connect with valve body, and under condition of ultralow temperature, valve seat easily deforms upon, and leads to valve seat
Gap is formed between valve body, leakage is serious in ultralow temperature medium, and energy loss is big.
2) it, leaks outside：Long-neck valve deck uses three-sectional welding structure, has twice weld seam on valve deck.Some manufacturers lead to
Heat treatment has not often been carried out to weld seam or heat treatment is not enough, has made the institutional framework and base material of weld metal zone and heat affected area
Difference causes the physical mechanical property at this different.Larger answer will be generated under condition of ultralow temperature, between weld seam and base material
Power, commissure are also easy to produce crackle, leakage occur and valve is caused to scrap, and generate serious economic loss or even generate serious thing
Therefore.
3), traditional upper sealing structure is located at the lower end of valve deck, distant from stuffing-box.When valve is opened completely
When, more cryogenic media is easily stored between upper seal support and stuffing-box bottom, temperature is also easy to produce high pressure when increasing, safety occur
Hidden danger.
Therefore, it is necessary to existing ultralow temperature forged steel gate valve is improved, to overcome above-mentioned technological deficiency.
Utility model content
The purpose of this utility model is to provide a kind of ultralow temperature forged steel gate valves, have excellent sealing performance, and have
The characteristics of safe to use.
To achieve the above object, the utility model uses following technical scheme：
A kind of ultralow temperature forged steel gate valve, including valve body, valve seat, valve deck and valve rod, wherein：There are two the valve seats,
It is symmetrically welded at the inside of the valve body, the intermediate setting flashboard of two valve seats；
The valve deck is the integral type long-neck valve deck that solid forging forms, and is fixedly mounted on the upper end of the valve body, described
There is stuffing-box inside the upper end of valve deck, be respectively provided with from the bottom to top in the stuffing-box the first packing layer, the second packing layer and
Third packing layer, first packing layer is identical with third packing layer, is that stainless steel wire and soft graphite weave, described
Second packing layer is 3~4 pieces of molding flexible graphite packings stacked；
The top installation filler pressing sleeve and hold-down grid of the third packing layer, the hold-down grid by eyelet bolt and
It is fixedly connected at the top of nut and the valve deck, and described filler layer is compressed and is sealed；
The valve rod is integrally arranged among the valve body, valve deck, stuffing-box, filler pressing sleeve, hold-down grid, the valve rod
Lower end be connected with the flashboard；
The inside setting upper seal support of the valve deck at the 10-30mm of bottom apart from the stuffing-box, the valve rod
Upper sealing pair is set on the corresponding position in periphery, and the upper seal support and upper sealing pair match, sealing structure in formation.
According to the utility model, the ultralow temperature forged steel gate valve, which further includes, is arranged on dripping outside the major diameter of the valve deck
Disk.
According to the utility model, disc spring is installed between the nut and the hold-down grid.
According to the utility model, the first gasket seal is set between the top end face of the bottom end of the valve deck and the valve body.
According to the utility model, there is bulge loop, the lateral surface of the bulge loop and the valve deck on the bottom face of the valve deck
Bottom face between form first annular slot, there is the second annular groove on the corresponding position of top end face of the valve body, described the
One annular groove and the second annular groove match, and form the space for installing first gasket seal, first gasket seal
Top surface and the top surface of the first annular slot are in close contact, and bottom surface and the bottom surface of second annular groove are in close contact.
According to the utility model, the inside of second annular groove has further recessed third annular groove, described convex
The lateral surface of ring lower end and the side of the third annular groove fit closely, and the second gasket is installed on the third annular groove
Piece.
According to the utility model, the top of the hold-down grid sets valve stem nut, the upper end of the valve rod and the valve
Stem nut is threadedly coupled, and the stem exterior above the valve stem nut is sequentially installed with operation handwheel and handwheel locking nut.
According to the utility model, the lower end of the valve rod is connect using T-slot with the flashboard.
According to the utility model, lumen relief hole is provided on the flashboard.
According to the utility model, the flashboard is monoblock type wedge shape flashboard, and the lumen relief hole has horizontal segment and hangs down
Straight section, the opening of the horizontal segment are communicated with the inlet channel of the valve body, and the opening of the vertical section is positioned at the flashboard
Bottom, and communicated with the lumen of the valve body.
Compared with prior art, the utility model has following advantageous effects：
1) the ultralow temperature forged steel gate valve of the utility model will not deform between valve seat and valve body because of condition of ultralow temperature lower valve base
And gap is generated, effectively prevent the interior leakage of medium under condition of ultralow temperature.
2) valve deck uses the integral structure that solid forging forms, and crackle is not likely to produce under condition of ultralow temperature, therefore significantly
The service life of valve is extended, improves economic benefit and safety in utilization.
3) upper seal support is arranged on the position (10-30mm) nearer from stuffing-box bottom, upper close when valve is opened completely
The cryogenic media stored between envelope seat and stuffing-box bottom is seldom, eliminates the security risk that part is boosted and occurred, uses peace
Good perfection.
Therefore, the ultralow temperature forged steel gate valve of the utility model has excellent sealing performance, and with safe to use
The characteristics of.
Description of the drawings
Fig. 1 is the ultralow temperature forged steel gate valve of the utility model.
Fig. 2 is the structure diagram of the valve body of the utility model.
Fig. 3 is the structure diagram of the valve deck of the utility model.
In figure：1- valve bodies, 2- valve seats, 3- valve decks, 4- valve rods, 5- flashboards, 6- eyelet bolts, 7- nuts, 8- drain pans, 9-
Disc spring, the first gasket seals of 10-, the first gasket seals of 101-, 102- valve stem nuts, 103- operations handwheel, the locking of 104- handwheels
Nut, 31- stuffing-boxes, the first packing layers of 32-, the second packing layers of 33-, 34- thirds packing layer, 35- filler pressing sleeves, 36- fillers
Pressing plate, 37- upper seal supports, 38- bulge loops, the first annular slots of 39-, 310- bottom sealing sockets, the second annular grooves of 11-, 12- thirds annular
Sealing pair under slot, 13- primary seals seat, the upper sealing pairs of 41-, 42-, 43- primary seals pair, 51- lumens relief hole, 52- horizontal segments,
53- vertical sections.
Specific embodiment
Below in conjunction with attached drawing, the ultralow temperature forged steel gate valve of the utility model is done further specifically with specific embodiment
It is bright.It should be understood that following embodiment is merely to illustrate the utility model not for restriction the scope of the utility model.
As shown in Figure 1, the ultralow temperature forged steel gate valve of the utility model, including valve body 1, valve seat 2, valve deck 3 and valve rod 4,
In：There are two the valve seats 2, is symmetrically welded at the inside of the valve body 1, the intermediate setting flashboard 5 of two valve seats 2.
The valve deck 3 is the integral type long-neck valve deck that solid forging forms, and is fixedly mounted on the upper end of the valve body 1, institute
Stating has stuffing-box 31 inside the upper end of valve deck 3, the first packing layer 32, second is respectively provided with from the bottom to top in the stuffing-box 31
Packing layer 33 and third packing layer 34, first packing layer 32 and third packing layer 34 are identical, are stainless steel wire and flexibility
Graphite weaves, and second packing layer 33 is 3~4 pieces of molding flexible graphite packings stacked.
The top installation filler pressing sleeve 35 and hold-down grid 36, the hold-down grid 36 of the third packing layer 34 pass through work
Section bolt 6 and nut 7 are fixedly connected with the top of the valve deck 3, and by first packing layer 32, the second packing layer 33 and the
Three packing layers 34 compress, and so as to fulfill sealing, prevent medium from leaking outside at the valve rod 4.
The valve rod 4 is whole be arranged in the valve body 1, valve deck 3, stuffing-box 31, filler pressing sleeve 35, hold-down grid 36 it
In, the lower end of the valve rod 4 is connected with the flashboard 5.
The inside setting upper seal support 37 of the valve deck 3 at the 10-30mm of bottom apart from the stuffing-box 31, the valve
Upper sealing pair 41 is set on the corresponding position in periphery of bar 4, and the upper seal support 37 and upper sealing pair 41 match, close in formation
Seal structure realizes the sealing between the valve rod 4 and valve deck 3, so as to prevent ultralow temperature medium from leaking outside.
The ultralow temperature forged steel gate valve of the utility model, the valve seat 2 is used with valve body 1 and is welded to connect, and non-mosaic connection,
Gap will not be generated due to condition of ultralow temperature lower valve base deforms between valve seat 2 and valve body 1, effectively prevent being situated between under condition of ultralow temperature
The interior leakage of matter.
The integral structure rather than the welding structure of multistage that the use of valve deck 3 solid forging forms, no-welding-seam are ultralow
Crackle is not likely to produce under the conditions of temperature, therefore significantly extends the service life of valve, improves economic benefit and safety in utilization.
The upper seal support 37 is arranged on the position nearer from 31 bottom of stuffing-box (from 31 bottom 10-30mm of stuffing-box),
When valve is opened completely, the cryogenic media stored between 31 bottom of upper seal support 37 and stuffing-box is seldom, eliminates local liter
The security risk pressed and occurred, safety in utilization are good.
According to the utility model, the ultralow temperature forged steel gate valve further includes the drop being arranged on outside the major diameter of the valve deck 3
Water pond 8.
The drain pan 8 is located at the appropriate location of 3 neck of valve deck, has heat-blocking action, it is ensured that the in stuffing-box 31
One packing layer 32, the second packing layer 33 and third packing layer 34 are in 0 DEG C or more of working environment without freezing always, from
And ensure good sealing effect.
According to the utility model, disc spring 9 is installed between the nut 7 and the hold-down grid 36.The elastic force of disc spring 9 leads to
Cross hold-down grid 36, filler pressing sleeve 35 is applied to first packing layer 32, on the second packing layer 33 and third packing layer 34, make
Its long-time use is unlikely to loosen.
According to the utility model, first gasket seal is set between the bottom end of the valve deck 3 and the top end face of the valve body 1
10.First gasket seal 10 realizes the sealing of the valve deck and the valve body junction, to prevent medium from leaking outside.
According to the utility model, on 3 bottom faces of the valve deck have bulge loop 38, the lateral surface of the bulge loop 38 with it is described
First annular slot 39 is formed between the bottom face of valve deck 38, there is the second annular on the corresponding position of top end face of the valve body 1
Slot 11, first annular 39 and second annular groove 11 of slot match, and form the space for installing first gasket seal 10, institute
It states the top surface of the first gasket seal 10 to be in close contact with the top surface of the first annular slot 39, bottom surface and second annular groove 11
Bottom surface be in close contact.
First gasket seal 10 is arranged in first annular 39 and second annular groove 11 of slot, effectively realizes the valve deck 3
With the sealing of 1 junction of valve body, to prevent medium from leaking outside.The bulge loop 38 further enhances sealing effect.
As shown in Figure 1 to Figure 3, according to the utility model, the inside of second annular groove 11 is with further recessed
Third annular groove 12, the side of the lateral surface and the third annular groove 12 of 38 lower end of bulge loop fit closely, the third
Second gasket seal 101 is installed on annular groove 12.First gasket seal 10 is combined with the second gasket seal 101, further
The sealing between the bottom face of the valve deck 3 and the top end face of valve body 1 is strengthened, so as to which ultralow temperature medium be effectively prevent to leak outside.
Further, 10 and second gasket seal 101 of the first gasket seal is that stainless steel wire and soft graphite are compiled
The gasket seal knitted.With good resistance to pressure, service life is long so that the safety of gate valve is good.
According to the utility model, the top of the hold-down grid 36 setting valve stem nut 102, the upper end of the valve rod 4 with
The valve stem nut 102 is threadedly coupled, and operation 103 He of handwheel is sequentially installed with outside the valve rod 4 of 102 top of valve stem nut
Handwheel locking nut 104.
Operation handwheel 103 rotation drives the valve stem nut 102 to rotate, so as to drive 5 liters of the valve rod 4 and flashboard
Drop realizes the switching motion of valve.
According to the utility model, the lower end of the valve rod 4 is connect using T-slot with the flashboard 5.
According to the utility model, lumen relief hole 51 is provided on the flashboard 5.Make valve in a closed condition, wherein
Chamber will not boost and safety accident occurs extremely.
According to the utility model, the flashboard 5 is monoblock type wedge shape flashboard, and the lumen relief hole 51 has horizontal segment 52
With vertical section 53, the opening of the horizontal segment 52 is communicated with the inlet channel of the valve body, and the opening of the vertical section 53 is located at
The bottom of the flashboard 5, and communicated with the lumen of the valve body 1.
According to the utility model, the bottom inner portion of the valve deck 3 setting bottom sealing socket 310, the corresponding valve rod 4 it is outer
The lower sealing pair 42 of week setting, the bottom sealing socket 310 and lower sealing pair 42 match, and form lower sealing structure, further realize
Sealing between the valve rod 4 and valve deck 3 further prevents ultralow temperature medium to leak outside, and eliminates the peace that part is boosted and occurred
Full hidden danger.
According to the utility model, setting primary seal seat 13 inside the upper end of the valve body 1, the corresponding valve rod 4 it is outer
Week sets primary seal pair 43, and the primary seal seat 13 and primary seal pair 43 match, and forms main seal structure, realizes the valve rod
Primary seal between 4 and valve body 1, so as to prevent being leaked in the ultralow temperature medium in the runner of the valve body 1 to the valve deck 3 and valve
In cavity between bar 1.
According to the utility model, the valve rod 4 is integral type forging.
According to the utility model, nitrogen treatment is done on the surface of the valve rod 4, and hardness is 500~600HV.
According to the utility model, the flashboard 5 is added with the surface at position that the valve seat 2 is in contact using hard alloy
By force, it to improve anti-friction ability, prevents from leaking at contact surface of the cryogenic media from flashboard 5 with valve seat 2.
Specific embodiment of the utility model is described in detail above, but it is only used as example, the utility model
It is not restricted to particular embodiments described above.To those skilled in the art, it is any that the practicality is equal
Modifications and substitutions are also all among the scope of the utility model.Therefore, the institute under the spirit and scope for not departing from the utility model
The impartial conversion of work and modification should all be covered in the scope of the utility model.
Claims (10)
1. a kind of ultralow temperature forged steel gate valve, including valve body, valve seat, valve deck and valve rod, which is characterized in that wherein：The valve seat has
Two, it is symmetrically welded at the inside of the valve body, the intermediate setting flashboard of two valve seats；
The valve deck is the integral type long-neck valve deck that solid forging forms, and is fixedly mounted on the upper end of the valve body, the valve deck
Upper end inside there is stuffing-box, be respectively provided with the first packing layer, the second packing layer and third from the bottom to top in the stuffing-box
Packing layer, first packing layer is identical with third packing layer, is that stainless steel wire and soft graphite weave, and described second
Packing layer is 3~4 pieces of molding flexible graphite packings stacked；
The top installation filler pressing sleeve and hold-down grid, the hold-down grid of the third packing layer pass through eyelet bolt and nut
It is fixedly connected at the top of the valve deck, and described filler layer is compressed and is sealed；
The valve rod is integrally arranged among the valve body, valve deck, stuffing-box, filler pressing sleeve, hold-down grid, under the valve rod
End is connected with the flashboard；
The inside setting upper seal support of the valve deck at the 10-30mm of bottom apart from the stuffing-box, the periphery of the valve rod
Upper sealing pair is set on corresponding position, and the upper seal support and upper sealing pair match, sealing structure in formation.
2. ultralow temperature forged steel gate valve according to claim 1, which is characterized in that the ultralow temperature forged steel gate valve, which further includes, to be set
Put the drain pan outside the major diameter of the valve deck.
3. ultralow temperature forged steel gate valve according to claim 1, which is characterized in that the nut and the hold-down grid it
Between disc spring is installed.
4. ultralow temperature forged steel gate valve according to claim 1, which is characterized in that the bottom end of the valve deck and the valve body
First gasket seal is set between top end face.
5. ultralow temperature forged steel gate valve according to claim 4, which is characterized in that have on the bottom face of the valve deck convex
First annular slot is formed between the bottom face of ring, the lateral surface of the bulge loop and the valve deck, the top end face of the valve body is corresponding
Position on there is the second annular groove, the first annular slot and the second annular groove match, and forms installation first sealing
The space of gasket, the top surface of the top surface of first gasket seal and the first annular slot are in close contact, bottom surface and described the
The bottom surface of second ring slot is in close contact.
6. ultralow temperature forged steel gate valve according to claim 5, which is characterized in that the inside of second annular groove have into
The recessed third annular groove of one step, the lateral surface of the bulge loop lower end and the side of the third annular groove fit closely, described
Second gasket seal is installed on third annular groove.
7. ultralow temperature forged steel gate valve according to claim 1, which is characterized in that the top setting valve rod of the hold-down grid
Nut, the upper end of the valve rod are threadedly coupled with the valve stem nut, and the stem exterior above the valve stem nut is installed successively
There are operation handwheel and handwheel locking nut.
8. ultralow temperature forged steel gate valve according to claim 1, which is characterized in that the lower end of the valve rod using T-slot with
The flashboard connection.
9. the ultralow temperature forged steel gate valve according to any one of claim 1-8, which is characterized in that in being provided on the flashboard
Chamber relief hole.
10. ultralow temperature forged steel gate valve according to claim 9, which is characterized in that the flashboard is monoblock type wedge shape flashboard,
The lumen relief hole has horizontal segment and vertical section, and the opening of the horizontal segment is communicated with the inlet channel of the valve body, institute
The opening of vertical section is stated positioned at the bottom of the flashboard, and is communicated with the lumen of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721403110.8U CN207500515U (en) | 2017-10-27 | 2017-10-27 | A kind of ultralow temperature forged steel gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721403110.8U CN207500515U (en) | 2017-10-27 | 2017-10-27 | A kind of ultralow temperature forged steel gate valve |
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| Publication Number | Publication Date |
|---|---|
| CN207500515U true CN207500515U (en) | 2018-06-15 |
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ID=62502284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721403110.8U Active CN207500515U (en) | 2017-10-27 | 2017-10-27 | A kind of ultralow temperature forged steel gate valve |
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| Country | Link |
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| CN (1) | CN207500515U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285227A (en) * | 2019-06-20 | 2019-09-27 | 苏州纽威阀门股份有限公司 | The assembly method of valve seat and valve body, the assembly method of smaller diameter valve and valve |
-
2017
- 2017-10-27 CN CN201721403110.8U patent/CN207500515U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285227A (en) * | 2019-06-20 | 2019-09-27 | 苏州纽威阀门股份有限公司 | The assembly method of valve seat and valve body, the assembly method of smaller diameter valve and valve |
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