CN2487923Y

CN2487923Y - Frictionless expansion gate valve

Info

Publication number: CN2487923Y
Application number: CN 01246040
Authority: CN
Inventors: 朱永泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-20
Filing date: 2001-06-20
Publication date: 2002-04-24
Anticipated expiration: 2011-06-20

Abstract

The utility model relates to a frictionless expansion gate valve which mainly comprises a valve body (4), a valve cover (3), a valve-spindle nut (22), a valve spindle (2) and a handwheel (1), wherein a sprag (7) and a valve core (8) which is detachable and matches with the sprag (7) in operation are fixed on the lower end of the valve spindle; a spring (5) is arranged between a shoulder (15) of the valve spindle and the top of the valve core; the valve core comprises a pair of valve flaps (16) which have the same structure and can be meshed with each other; and the two valve flaps are elastically arranged on the lower end of the valve spindle through two leaf springs (6) which are respectively and elastically contacted with an upper convex block (17) and a lower convex block (18) on one end of a valve flap and contacted with a middle convex block (19) on another side of the other valve flap.

Description

No frictional expansion sluice valve

The utility model relates to a kind of gate valve, particularly a kind of no frictional expansion sluice valve.

Gate valve is a kind of widely used valve, but its deadly defect is always to produce wearing and tearing because of friction when opening and closing, and therefore, is difficult to its working life improve.

The purpose of this utility model provides a kind of no frictional expansion sluice valve, and it can avoid rubbing when opening and closing, thereby improves working life greatly.

The purpose of this utility model is achieved through the following technical solutions, a kind of no frictional expansion sluice valve is provided, it mainly comprises a valve body, valve body has an import and the outlet on same axis, tube chamber between import and outlet, and with another axis of above-mentioned axis normal on, with import with export the endoporus that is communicated with; Be fixedly mounted on valve gap on the valve body, that be communicated with endoporus; Rotatable but can not be installed in Stem Mut in the top of valve gap with moving axially; Be threaded with Stem Mut and extend through valve body endoporus, can enter the valve rod of tube chamber; And be fixedly mounted on handwheel on the Stem Mut.Wherein, the part place that valve rod is positioned at endoporus has a shoulder, a voussoir is fixed in the valve rod lower end, the valve rod lower end removably install one with the spool of voussoir cooperating, and between the top of the shoulder of valve rod and spool, a spring that always forces spool to move down is installed.Wherein, spool comprise a pair of structure identical, can intermeshing flap, the inboard of each flap has the inclined-plane that cooperates with voussoir, the top and bottom of one side in each flap outside have a upper protruding block and a lower protruding block respectively, and the middle part of the opposite side in each flap outside has projection in, and two leaf springs are respectively by flexibly being installed in two flaps the lower end of valve rod with the middle projection Elastic Contact of the upper protruding block of a flap one side and lower protruding block and another flap opposite side.

In described no frictional expansion sluice valve, a packing ring is installed between the upper surface of spring and spool.

The utility model has the advantages that this gate valve does not produce friction in seal spool tube chamber process, therefore do not have wear problem, so its working life is long especially.

Describe an embodiment of the present utility model in detail below in conjunction with accompanying drawing, so that more clearly understand feature and advantage of the present utility model.

Fig. 1 is the partial sectional view according to an embodiment of gate valve of the present utility model;

Fig. 2 is the front view of a flap;

Fig. 3 is the right elevation of the flap among Fig. 2;

Fig. 4 is the left view of the flap among Fig. 2;

Fig. 5 is the plan view of the flap among Fig. 2.

Referring to Fig. 1, mainly comprise a valve body 4, a valve gap 3, a Stem Mut 22, a valve rod 2 and a handwheel 1 according to a kind of no frictional expansion sluice valve of the present utility model.Wherein, valve body 4 has an import 11 and the outlet 12 on same axis, in import 11 with export tube chamber 13 between 12, and with another axis of above-mentioned axis normal on, with import 6 with export 7 endoporus that are communicated with 14.Valve gap 3 is fixedly mounted on the valve body 4, and is communicated with endoporus 14.Stem Mut 22 turns but can not be installed in the top of described valve gap 3 with moving axially.Valve rod 2 is threaded with Stem Mut 22 and extends through the endoporus 14 and the tube chamber 13 of valve body 4; The part place that valve rod 2 is positioned at endoporus 14 has a shoulder 15.And handwheel 1 is fixedly mounted on the Stem Mut 22 and the upper end of extending valve gap 3.

In addition, fix in valve rod 2 lower ends that a voussoir 7 and is removably installed, with the spool 8 of voussoir 7 cooperatings.And a spring 5 that always forces described spool 8 to move down is installed between the top of the shoulder 15 of valve rod 2 and spool 8.One packing ring 9 also can be installed between the upper surface of spring 5 and spool 8.

Please in conjunction with referring to Fig. 2-5, spool 8 comprise a pair of structure identical, can intermeshing flap 16.The inboard of each flap 16 has the inclined-plane 20 (referring to Fig. 3) that cooperates with voussoir 7, the top and bottom of one side in each flap 16 outside have a upper protruding block 17 and a lower protruding block 18 (referring to Fig. 1 and 3) respectively, and the middle part of the opposite side in each flap 16 outside has projection 19 in (referring to Fig. 1 and 4), two leaf springs 6 (only drawn one among Fig. 1, another leaf spring 6 is at opposition side) are respectively by with middle projection 19 Elastic Contact of the upper protruding block 17 of a flap 16 1 sides and lower protruding block 18 and another flap 16 opposite sides and two flaps 16 flexibly are installed in the lower end of valve rod 2.

The working principle of this gate valve is that when handwheel 1 moved in the direction of the clock, valve rod 2 had been with spool 8 to move down together, stopped to move down when the bottom platform 11 of valve body 4 is run in the bottom of spool 8.Continue to move in the direction of the clock as handwheel 1, valve rod 2 continues to move down with voussoir 7, so voussoir 7 laterally promotes flap 16 by the flap inclined-plane 20 that is mated contact to both sides, thereby the outer side surface of flap 16 and the sealing surface of valve body 4 are drawn close, until sealing (position shown in Figure 1) fully.

Otherwise, when handwheel 1 rotates by counter clockwise direction, move on valve rod 2 begins, but spool 8 is subjected to the thrust of spring 5 and can not rises immediately at this moment, and can only leave valve body sealing surface along with moving on the voussoir 7 with inside contraction of the effect of leaf spring 6.When the inside top surface of voussoir shoulder 10 and flap 16 contact, could drive two flaps 16 and move on together, and withdraw from valve tube chamber 13, contact with inner surface 21 on the valve gap 3 until the upper surface of valve rod 2 shoulders 15, to reach the purpose that seals.

Claims

1. no frictional expansion sluice valve, it mainly comprises a valve body (4), described valve body (4) has an import (11) and the outlet (12) on same axis, tube chamber (13) between described import (11) and described outlet (12), and with another axis of above-mentioned axis normal on, the endoporus (14) that is communicated with described import (6) and described outlet (7); Be fixedly mounted on valve gap (3) on the described valve body (4), that be communicated with described endoporus (14); Rotatable but can not be installed in Stem Mut (22) in the top of described valve gap (3) with moving axially; Be threaded with described Stem Mut (22) and extend through described valve body (4) described endoporus (14), can enter the valve rod (2) of described tube chamber (13); And be fixedly mounted on handwheel (1) on the described Stem Mut (22); It is characterized in that, the part place that described valve rod (2) is positioned at described endoporus (14) has a shoulder (15), a voussoir (7) is fixed in described valve rod (2) lower end, described valve rod (2) lower end removably install one with the spool (8) of described voussoir (7) cooperating, and between the top of the described shoulder (15) of described valve rod (2) and described spool (8) installation one spring (5) that always forces described spool (8) to move down; Wherein, described spool (8) comprises that a pair of structure is identical, can intermeshing flap (16), the inboard of each flap (16) has the inclined-plane (20) that cooperates with described voussoir (7), the top and bottom of one side in each flap (16) outside have a upper protruding block (17) and a lower protruding block (18) respectively, and the middle part of the opposite side in each flap (16) outside has projection in (19), and two leaf springs (6) are respectively by flexibly being installed in two flaps (16) lower end of valve rod (2) with middle projection (19) Elastic Contact of the upper protruding block (17) of a flap (16) one sides and lower protruding block (18) and another flap (16) opposite side.

2. no frictional expansion sluice valve as claimed in claim 1 is characterized in that, a packing ring (9) is installed between the upper surface of described spring (5) and described spool (8).