CN2821311Y

CN2821311Y - Soft seal gate valve

Info

Publication number: CN2821311Y
Application number: CN 200520027407
Authority: CN
Inventors: 郑禄坤; 霍克强; 匡振东; 石璎; 安娜
Original assignee: Tianjin Tanggu Twt Valve Co ltd
Current assignee: Tianjin Tanggu Twt Valve Co ltd
Priority date: 2005-09-20
Filing date: 2005-09-20
Publication date: 2006-09-27
Anticipated expiration: 2015-09-20

Abstract

The utility model relates to a kind of soft sealing gate valve, it is characterized in that: be provided with wide end opening suitable for reading narrow flashboard socket and guiding rib in the valve body; Flashboard is that the upper end on two sides, front and back is provided with arc wide at the top and narrow at the bottom sealing seam both sides and is provided with guiding groove, the shape of lower end shape and body cavity adapts and is coated with the double layer construction flashboard of rubber on its surface, upper end at flashboard has guide hole, in guide hole suitable for reading nut is housed; O-ring seal is housed in the hole of valve gap and axle sleeve is arranged, on the mating face of valve gap and valve body epicoele, O-ring seal is housed, periphery along valve gap has the screw that the upper end is provided with circular concave station, valve gap is installed in by the bolt that sinks to circular concave station on the epicoele of valve body, and bolt connects together with sealer and valve gap envelope; Valve rod passes the O-ring seal that is equipped with in the valve cover hole and axle sleeve and is screwed in the nut on the flashboard; The employing breaker bolt of handwheel is fixed; Interior and the outer surface of valve body, valve gap all is coated with epoxy resin powder coating.Its advantage is: the moment of torsion of closing operation is little; Sealability is good; Corrosion can not take place in long-term the use yet; Flashboard can not come off from valve rod.

Description

A kind of soft sealing gate valve

Technical field

The utility model belongs to valve, particularly relates to a kind of soft sealing gate valve.

Background technique

In present known technology, gate valve is the valve body that has epicoele made by metallic material, be positioned on valve gap on the valve body epicoele, be contained in flashboard in the valve body, be installed on the valve gap and the valve rod that is connected with flashboard in the lower end and be contained in handwheel on the valve rod upper tip etc. and constitute, it is in order to realize the valve body flowing lumen, be that the sealing of inner chamber is provided with in the bottom of the inner chamber of valve body usually to hold board slot or be equipped with and is provided with the valve plate sealing seat that holds board slot, the gate valve of this structure has following defective or deficiency: 1. the sealing surface of flashboard is the metal wedge shape, and the operation moment of torsion is big; 2. because the appearance board slot is arranged, sealing surface is little, and the circulating resistance of medium is big, very easily causes the impurity deposition and is stranded in and hold in the board slot, hinders closing of flashboard, causes poorly sealedly, leakage phenomenon occurs; 3. metal valve member directly contacts with medium, and long-term use can corrosion take place and medium is polluted; 4. support the screw that flashboard moves up and down and be located on valve body epicoele or the valve gap, move up and down with restrictor bar when flashboard opens and closes, flashboard is come off from valve rod as misoperation.

Summary of the invention

The utility model provides a kind of operation moment of torsion little for solving the technical problem that exists in the known technology, and sealability is good, and corrosion does not take place in long-term use, and the flashboard soft sealing gate valve that can not come off.

The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

A kind of soft sealing gate valve, comprise the valve body that has epicoele, be positioned on valve gap on the valve body epicoele, be contained in flashboard in the valve body, be installed on the valve gap and the valve rod that is connected with flashboard in the lower end and be contained in handwheel on the valve rod upper tip, it is characterized in that: the lower end of the epicoele of valve body is provided with the narrow flashboard socket of wide end opening suitable for reading, be provided with in the both sides of socket stretch to body cavity guiding rib; Flashboard is that the upper end on two sides, front and back is provided with the arc wide at the top and narrow at the bottom sealing seam that protrudes from the flashboard surface, the bottom is circular arc that adapts with the shape of body cavity and the double layer construction flashboard that is coated with rubber on its surface, respectively be provided with the corresponding guiding groove of guiding rib with lower end, flashboard socket both sides in the both sides of flashboard, central authorities have the valve rod guide hole in the upper end of flashboard, in guide hole suitable for reading the flashboard nut that inwall is provided with female thread are housed; The upper end of valve gap is prism, it installs in the hole of valve rod and O-ring seal is housed and has been screwed axle sleeve in the upper end, periphery along valve gap has the screw that several upper ends are provided with circular concave station, the concave head bolt of head end diameter less than circular concave station diameter is housed in the screw, on the mating face of valve gap and valve body epicoele, O-ring seal is housed, valve gap is fixed on by the concave head bolt that sinks to circular concave station on the epicoele of valve body, and concave head bolt and valve gap connect together with sealant sealing; The lower end outer wall of valve rod be provided with flashboard on the external screw thread that matches of the female thread of Stem Mut, the upper end is provided with square toes, it passes the O-ring seal that is equipped with in the valve gap upper end hole and axle sleeve and is screwed in the nut on the flashboard; The center of handwheel has the square hole that the square toes with restrictor bar upper end match, and it is contained in the valve rod upper end by square hole, and adopts the upper end to have polygonal recess and the circular breaker bolt that is provided with cylindrical boss at the recess center is fixed.

The utility model can also adopt following technical measures:

Interior and the outer surface of described valve body, valve gap all is coated with epoxy resin powder coating.

External screw thread on female thread on the described flashboard nut inner wall and the valve rod lower end outer wall is trapezoidal thread.

Advantage and the good effect that the utlity model has are: 1. because the flashboard surface is coated with rubber, the lock intracoelomic cavity is not established the appearance board slot, thereby the moment of torsion of closing operation is little; 2. because the lock intracoelomic cavity is not established the appearance board slot, the circulating resistance of medium is little, impurity can not deposit to be trapped in and hold in the board slot and hinder closing of flashboard, avoided leakage phenomenon, the sealing seam of flashboard and both sides are domatic flashboard socket and are the flashboard bottom of circular arc and closely cooperating of lock intracoelomic cavity, and the elastic reaction of dependence rubber, guaranteed that the more traditional gate valve of its sealability has bigger improvement and raising, so sealability is good; 3. because the flashboard surface is coated with rubber, and the inner and outer surface of valve body and valve gap is coated with epoxy resin powder coating, corrosion can not take place in long-term the use yet, thereby avoided pollution that medium is caused 4. to support the upper end that screw that flashboards move up and down is located at flashboard, promptly on the flashboard nut of valve rod guide hole upper end dress, valve rod did not move up and down when flashboard opened and closed, so flashboard can not come off from valve rod; In addition, handwheel adopts breaker bolt to fix, and no special tool can not be dismantled, and also can under the upstream does not cut off the situation of medium the axle head seepage not carried out the replacing of seal ring.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is the I portion enlarged view of Fig. 1;

Fig. 5 is the structural representation of flashboard of the present utility model;

Fig. 6 is the top view of Fig. 5;

Fig. 7 is the structural representation at valve gap of the present utility model position;

Fig. 8 is the revolved view of Fig. 7;

Fig. 9 is the nut schematic representation of breaker bolt of the present utility model.

Figure 10 is the connection diagram of breaker bolt of the present utility model.

Label among the figure is respectively: 1, and valve body; 2, flashboard; 3, the flashboard nut; 4, valve rod; 5, O-ring seal (on the valve gap); 6, bolt; 7, valve gap; 8, the anti-attrition packing ring; 9, O-ring seal (on the valve rod); 10, axle sleeve; 11, handwheel; 12, breaker bolt; 13, guiding rib; 14, the sealing seam; 15, guiding groove; The 16-sealer; The 17-pad.

Embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

See also Fig. 1 to Fig. 8, soft sealing gate valve, be provided with the band epicoele valve body 1, be positioned on valve gap 7 on the valve body epicoele, be contained in flashboard 2 in the valve body, be installed on the valve gap and the valve rod 4 that is connected with flashboard in the lower end and be contained in handwheel 11 on the valve rod upper tip, the lower end of the epicoele of valve body is provided with the narrow flashboard socket of wide end opening suitable for reading, be provided with in the both sides of socket stretch to body cavity guiding rib 13; The upper end on two sides is provided with the arc sealing seam 14 wide at the top and narrow at the bottom that protrudes from the flashboard surface before and after the flashboard, its underpart is the circular arc (see figure 5) that the shape with body cavity adapts, and have boss in the both sides of the outer rim of circular arc, outer surface at flashboard is coated with rubber, constitute double-deck flashboard, the rubber covering of the outer rim that it contacts with inner chamber has lip limit (see figure 3), the outside that is positioned at sealing seam 14 in the flashboard both sides respectively is provided with and the corresponding guiding groove 15 of the guiding rib of flashboard socket both sides (seeing Fig. 5 and 6), central authorities have the valve rod guide hole in the upper end of flashboard, the internal fixation suitable for reading of guide hole is equipped with the flashboard nut 3 (screw thread can adopt the single line trapezoidal thread, also can adopt multi-thread trapezoidal thread) that inwall is provided with trapezoidal female thread; The upper end of valve gap is prism (seeing Fig. 7 and 8), it installs in the hole of valve rod anti-attrition packing ring 8 and O-ring seal 9 is housed, and be screwed axle sleeve 10 in the upper end, periphery along valve gap has the screw that several upper ends are provided with circular concave station, concave head bolt 6 (see figure 4)s of head end diameter less than circular concave station diameter are housed in the screw, on the mating face of valve gap and valve body epicoele, all offer groove, special-shaped O-ring seal 5 (see figure 7)s are housed in the groove, valve gap is fixed on (see figure 4) on the epicoele of valve body by the concave head bolt that sinks to circular concave station, concave head bolt 6 connects together with sealant sealing 16 envelopes with valve gap; The lower end outer wall of valve rod be provided with flashboard on the external screw thread that matches of the female thread of Stem Mut, the upper end is provided with square toes, it passes the O-ring seal that is equipped with in the valve gap upper end hole and axle sleeve and is screwed in the flashboard nut on the flashboard; The center of handwheel has the square hole that the square toes with restrictor bar upper end match, it is contained in valve rod upper end by square hole, and adopts the circular breaker bolt 12 that has polygonal recess on pad 17, the upper end nut and be provided with cylindrical boss at the recess center to fix (seeing Fig. 9 and 10); Corrosion takes place in order to prevent metal valve body and valve gap from directly contacting with medium, is coated with epoxy resin powder coating at their interior and outer surface.

Claims

1. soft sealing gate valve, comprise the valve body that has epicoele, be positioned on valve gap on the valve body epicoele, be contained in flashboard in the valve body, be installed on the valve gap and the valve rod that is connected with flashboard in the lower end and be contained in handwheel on the valve rod upper tip, it is characterized in that: the lower end of the epicoele of valve body is provided with the narrow flashboard socket of wide end opening suitable for reading, be provided with in the both sides of socket stretch to body cavity guiding rib; Flashboard is that the upper end on two sides, front and back is provided with the arc wide at the top and narrow at the bottom sealing seam that protrudes from the flashboard surface, the bottom is circular arc that adapts with the shape of body cavity and the double layer construction flashboard that is coated with rubber on its surface, respectively be provided with the corresponding guiding groove of guiding rib with lower end, flashboard socket both sides in the both sides of flashboard, central authorities have the valve rod guide hole in the upper end of flashboard, in guide hole suitable for reading the flashboard nut that inwall is provided with female thread are housed; The upper end of valve gap is prism, it installs in the hole of valve rod and O-ring seal is housed and has been screwed axle sleeve in the upper end, periphery along valve gap has the screw that several upper ends are provided with circular concave station, the concave head bolt of head end diameter less than circular concave station diameter is housed in the screw, on the mating face of valve gap and valve body epicoele, O-ring seal is housed, valve gap is fixed on by the concave head bolt that sinks to circular concave station on the epicoele of valve body, and concave head bolt and valve gap connect together with sealant sealing; The lower end outer wall of valve rod be provided with flashboard on the external screw thread that matches of the female thread of Stem Mut, the upper end is provided with square toes, it passes the O-ring seal that is equipped with in the valve gap upper end hole and axle sleeve and is screwed in the nut on the flashboard; The center of handwheel has the square hole that the square toes with restrictor bar upper end match, and it is contained in the valve rod upper end by square hole, and adopts the upper end to have polygonal recess and the circular breaker bolt that is provided with cylindrical boss at the recess center is fixed.

2. soft sealing gate valve according to claim 1 is characterized in that: the interior and outer surface of described valve body, valve gap all is coated with epoxy resin powder coating.

3. soft sealing gate valve according to claim 1 and 2 is characterized in that: the external screw thread on female thread on the described flashboard nut inner wall and the valve rod lower end outer wall is trapezoidal thread.