CN202418669U

CN202418669U - Flat valve of high sealing property

Info

Publication number: CN202418669U
Application number: CN2011205444655U
Authority: CN
Inventors: 姜玉虎; 张学青; 丁中铭; 姜金维; 李海荣
Original assignee: JIANGSU HONGTAI PETROCHEMICAL MACHINERY CO Ltd
Current assignee: JIANGSU HONGTAI PETROCHEMICAL MACHINERY CO Ltd
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2012-09-05
Anticipated expiration: 2021-12-20

Abstract

The utility model discloses a flat valve of high sealing property. The flat valve consists of a valve body component part, an intermediate transmission part and a sealing part, wherein the valve body component part is divided into a valve body, a valve cover, a bracket, an indication nut, a valve seat and a laminated spring; the intermediate transmission part is divided into a power transmission component and a valve plate; the power transmission component consists of a hand wheel and a valve rod; and the sealing part comprises an intermediate hole sealing ring, a valve rod filler, a valve seat sealing member, a valve seat sealing ring and a filler gland. The flat valve is characterized in that: the passage space in the valve body is designed to be a hole of which the top and the bottom are circular and the middle part is square; the diameter of the top circular part and the bottom circular part is equal to the diagonal distance of the square hole, so that the valve seat is more close to a gate plate to reduce wear and increase the sealing performance of the gate plate and the valve seat; the valve seat sealing ring is additionally arranged on the valve seat, so that pressure in the valve cavity is quickly balanced, the optimal sealing property is realized and the advantages of service life of the flat gate valve and easiness in manufacturing are considered; and because of high reliability of a wedge valve, leakage caused by super high pressure and super low pressure can be prevented well.

Description

The high leak tightness flap type

Technical field

The utility model belongs to valve and makes the field, is specifically related to a kind of high leak tightness flap type.

Background technique

Plate valve is the abbreviation of Parallel gate valve Parallel slide valve; Be a kind of in the gate valve, wherein be divided into Single disc gate valve and double-flashboard gate valve, gate valve is mainly used in the liquid flow direction that the control grains of sand, dirt mix; Connect and cut off flow, so gate valve receives the erosion of circulating liquid easily and washes away.Gate valve is widely used in the occasion of high-sulfur oils gas field, long-distance transport pipes, the construction of natural gas fields, natural gas purification and long defeated petroleum production, product oil conveying, and is dangerous big because the medium of its conveying is inflammable and explosive, so very high to the sealing requirements of valve.Conventional ordinary flat gate valve can occur leaking under the unsettled occasion of high and low pressure because it can't reach forced seal by self structure, though conventional common wedge action valve reliability is high, but valve plate receives washing away of permeable medium easily, and working life is shorter.Therefore, need a kind of advantage that has merged conventional general plate valve and wedge action valve in the production, simple in structure, safe and reliable, the plate valve that working life is long.

Summary of the invention

To the defective that exists in the existing techniques, the purpose of the utility model is to provide a kind of high leak tightness flap type, and it increases the sealability of flashboard and valve seat.And set up valve base seal, valve seat insert at valve seat, and make the quick balance of valve pocket pressure, realize best sealability, safe and reliable when guaranteeing work, can also prolong working life of valve plate and valve seat simultaneously.

The utility model is realized through following technological scheme.

A kind of high leak tightness flap type comprises valve body, valve base seal, valve seat insert, valve seat, folded spring, valve plate, guide plate, valve rod, mesopore seal ring, Stem Mut, valve gap, grease pouring valve, stem packing, hex head bolt, studding bolt, Gland, support, Cock screw, lubricating cup, thrust ring, bearing, dust ring, Cock screw, valve bonnet, indication nut, flat key, handwheel, hex head bolt, cover plate, lining, spacer ring, nameplate, rivet.It is characterized in that: described high leak tightness flap type is made up of valve body piece part, middle drive part, hermetic unit; Wherein valve body piece partly is divided into valve body, valve gap, support, indication nut and valve seat and folded spring, and valve seat is embedded among the valve body, and folded spring is installed between valve seat and the valve body; Valve gap is connected with valve body; Be connected together through screw thread with support simultaneously, in cantilever tip the indication nut be installed, it plays indicative function to valve rod; Middle drive part is divided into power transmitting assembly and valve plate, and power transmitting assembly is made up of handwheel, valve rod.Be connected through screw between handwheel and the valve rod; Valve rod passes through bearings in rack inner wall; Be connected through leading screw between valve plate and the valve rod, the guide plate of valve plate cooperates with valve body and moves up and down, and hermetic unit is embodied in the connection procedure of each several part; Comprise mesopore seal ring, stem packing, valve base seal, valve seat insert and Gland; Valve base seal and valve seat insert are installed between valve body and the valve seat, and the mesopore seal ring is installed in valve body and valve gap assembling surface of contact, and stem packing and Gland are installed in the hollow space of valve gap and valve rod formation.

A kind of high leak tightness flap type of the utility model is characterized in that valve body internal channel spatial design is become the middle square hole of circle up and down, and diameter of a circle equals the diagonal distance of square hole up and down, and sets up valve seat insert at valve seat.

The beneficial effect of implementing the utility model is:

Employing becomes the middle square hole of circle up and down with valve body internal channel spatial design, and diameter of a circle equals the diagonal distance of square hole up and down, so that make valve seat press close to flashboard more; Reduce wear, increase the sealability of flashboard and valve seat, and set up valve seat insert at valve seat; Make the quick balance of valve pocket pressure; Realize best sealability, have advantage such as reliable easy and safe to operate, reduce the space that drift sand is invaded to the full extent; Realize the safe and reliable use of valve; Taken into account the working life of plate valve, the advantage of making simple aspect and the high reliability of wedge valve, can well prevent the seepage that ultrahigh pressure and low pressure cause, be applicable to process of conveying inflammable is explosive, danger is big medium and in the very high environment of the sealing requirements of valve.

Description of drawings

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

Fig. 2 is valve base seal, valve seat insert, valve seat and the folded spring part-structure sectional view of the utility model;

At Fig. 1; Among Fig. 2: 1. valve body; 2. valve base seal; 3. valve seat insert; 4. valve seat; 5. folded spring; 6. valve plate; 7. guide plate; 8. valve rod; 9. mesopore seal ring; 10. Stem Mut; 11. valve gap; 12. grease pouring valve; 13. stem packing; 14. hex head bolt; 15. studding bolt; 16 Glands; 17. support; 18. Cock screw; 19. lubricating cup; 20. thrust ring; 21. bearing; 22. dust ring; 23. Cock screw; 24. valve bonnet; 25. indication nut; 26. flat key; 27. handwheel; 28. hex head bolt; 29. cover plate; 30. lining; 31. spacer ring; 32. nameplate; 33. rivet.

Specific embodiments

Below in conjunction with Figure of description, the utility model is explained further details:

A kind of high leak tightness flap type comprises valve body 1, valve base seal 2, valve seat insert 3, valve seat 4, folded spring 5, valve plate 6, guide plate 7, valve rod 8, mesopore seal ring 9, Stem Mut 10, valve gap 11, grease pouring valve 12, stem packing 13, hex head bolt 14, studding bolt 15, Gland 16, support 17, Cock screw 18, lubricating cup 19, thrust ring 20, bearing 21, dust ring 22, Cock screw 23, valve bonnet 24, indication nut 25, flat key 26, handwheel 27, hex head bolt 28, cover plate 29, lining 30, spacer ring 31, nameplate 32, rivet 33.It is characterized in that described high leak tightness flap type, wherein valve seat 4 is embedded among the valve body 1, and folded spring 5 is installed between valve seat 4 and the valve body 1; Valve gap 11 is connected with valve body 1, is connected together through screw thread with support 17 simultaneously, and indication nut 25 is installed on support 17 tops; It plays indicative function to valve rod 8; Be connected between handwheel 27 and the valve rod 8, valve rod 8, is connected through leading screw between valve plate 6 and the valve rod 8 in support 17 inwalls through bearings; The guide plate 7 of valve plate 6 cooperates with valve body 1 and moves up and down; Valve base seal 2 and valve seat insert 3 are installed between valve body 1 and the valve seat 4, and mesopore seal ring 9 is installed in valve body 1 and valve gap 11 assembling surface of contact, and stem packing 13 and Gland 16 are installed in the hollow space of valve gap 11 and valve rod 8 formation.

Claims

1. high leak tightness flap type; Comprise valve body, valve base seal, valve seat insert, valve seat, folded spring, valve plate, guide plate, valve rod, mesopore seal ring, Stem Mut, valve gap, grease pouring valve, stem packing, hex head bolt, studding bolt, Gland, support, Cock screw, lubricating cup, thrust ring, bearing, dust ring, Cock screw, valve bonnet, indication nut, flat key, handwheel, hex head bolt, cover plate, lining, spacer ring, nameplate, rivet; It is characterized in that its valve seat is embedded among the valve body; Folded spring is installed between valve seat and the valve body, and valve gap is connected with valve body, is connected together through screw thread with support simultaneously; In cantilever tip the indication nut is installed; Be connected through screw between handwheel and the valve rod, valve rod, is connected through leading screw between valve plate and the valve rod in rack inner wall through bearings; The guide plate of valve plate cooperates with valve body and moves up and down; Valve base seal and valve seat insert are installed between valve body and the valve seat, and the mesopore seal ring is installed in valve body and valve gap assembling surface of contact, and stem packing and Gland are installed in the hollow space of valve gap and valve rod formation.

2. a kind of high leak tightness flap type according to claim 1 is characterized in that valve body internal channel space is square hole in the middle of justifying up and down, and diameter of a circle equals the diagonal distance of square hole up and down.