CN201145043Y

CN201145043Y - Stop valve

Info

Publication number: CN201145043Y
Application number: CNU2008200310173U
Authority: CN
Inventors: 李昌跃; 顾迎春; 李海伟
Original assignee: JIANGSU YANDAIN VALVE CO Ltd
Current assignee: JIANGSU YANDAIN VALVE CO Ltd
Priority date: 2008-01-22
Filing date: 2008-01-22
Publication date: 2008-11-05
Anticipated expiration: 2018-01-22

Abstract

The utility model provides a stop valve which comprises a valve body, a valve stem, a valve flap, an upper support frame, a low support frame and an operating hand wheel, wherein the valve body is provided with a passage through a valve chamber of the valve body, the valve flap is arranged on the lower end of the valve stem and is placed in the valve chamber, corresponding to the passage; the upper part of the valve body is provided with the low support frame, the upper support frame is arranged on the upper part of the low support frame through a screw threads, a back cut of the valve body is provided with a pressure plate, the upper end of the valve stem passes through the pressure plate and is placed in the inner space of the upper support frame; the lower end of the operating hand wheel is provided with a valve stem nut which is placed in the back cut of the upper support frame and is limited by a gland bush, the inner space of the valve stem nut is connected to the upper end of the valve stem through screw threads. The utility model is characterized in that the valve stem and the valve flap does not rotate along with the rotation of the hand wheel during the opening or closing operation, thereby lowering mechanical wear and improving service life and operational reliability of the valve.

Description

A kind of stop valve

Technical field

The utility model relates to a kind of valve, and particularly a kind of valve rod and flap do not rotate and the stop valve of energy opening and closing.

Background technique

At present, stop valve has been widely used in industries such as electric power, waterpower, chemical industry, oil refining, metallurgy.Existing stop valve is made up of valve body, valve rod, flap, upper bracket and lower support frame usually, pass through the operation handwheel at rotation valve rod top during work, the drive valve rod rotates, by the threaded function between valve rod top and upper bracket, thereby make on the flap of valve rod and lower end thereof/motion down, flap is opened the passage of offering on the valve body/stop up, and makes stop valve realize opened/closed.Because valve rod and flap when work, rotate along with the rotation of operation handwheel, thereby make valve rod and flap easy to wear, reduced the functional reliability of stop valve, shortened the working life of valve.

The model utility content

For overcoming the deficiencies in the prior art part, the utility model provides a kind of rational in infrastructure, easy to use, wearing and tearing are little, the life-span is long stop valve.

The technological scheme that its technical problem that solves the utility model adopts is: comprise valve body, valve rod, flap, upper bracket, lower support frame and operation handwheel; Offer the passage that connects its valve pocket on the valve body, flap is loaded on the lower end of valve rod, place in the valve pocket, and corresponding with passage; Lower support frame is equipped with on the top of valve body, upper bracket loads the top of support by screw thread, the pressing plate that is equipped with suitable for reading of valve body, the inner chamber that pressing plate places upper bracket is passed in the upper end of valve rod, it is characterized in that: Stem Mut is equipped with in the lower end of operation handwheel, Stem Mut places in upper bracket suitable for reading, and spacing with gland; The inner chamber of Stem Mut links to each other with the upper end of valve rod by screw thread.Like this, when needs are opened stop valve, by rotary manipulation handwheel deasil, rotate and drive with its fixing Stem Mut, Stem Mut only rotates and does not move up and down owing to be subjected to spacingly in upper bracket, thereby make the valve rod that links to each other with its screw thread move upward and not rotate, the flap that is loaded on the valve rod lower end is also up thereupon, passage conducting, valve opening.When needs are closed stop valve, then rotate in the counterclockwise the operation handwheel, rotate and drive with its fixing Stem Mut, Stem Mut is owing to be subjected to spacing in upper bracket, only rotate and do not move up and down, thereby the feasible valve rod that links to each other with its screw thread moves downward and do not rotate, the flap that is loaded on the valve rod lower end is also descending thereupon, blocking channel, valve closing.

For ease of processing and assembling, the lower end surface of aforesaid operations handwheel is provided with square or Hexagon boss, and this boss places the upper-end surface corresponding groove of Stem Mut, makes that Stem Mut also rotated thereupon when the operation handwheel rotated.

Surface friction drag when rotating for reducing Stem Mut is between the outside and upper bracket inwall of Stem Mut, be equipped with bearing between the outside of upper bracket inwall and valve rod.

Be to guarantee the upper and lower motion of valve rod, between the inwall of the outside of valve rod and upper bracket, be provided with flat key.

The utility model is not because when carrying out the On/Off operation, valve rod and flap rotate along with the rotation of operation handwheel, thereby have reduced mechanical wear, have improved the working life and the functional reliability of valve.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation.

Among the figure: 1 for valve body, 2 for passage, 3 for flap, 4 for Packing seat, 5 for straight pin, 6 for bolt, 7 for nut, 8 for lower support frame, 9 for upper bracket, 10 for bearing, 11 for gland, 12 for Stem Mut, 13 for the operation handwheel, 14 for valve rod, 15 for flat key, 16 for pressing plate, 17 be filler for splitting a screw till the annulus, 18,19.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

Comprise valve body 1, valve rod 14, flap 3, upper bracket 9, lower support frame 8, operation handwheel 13 and Stem Mut 12; Offer the passage 2 that connects its valve pocket on the valve body 1, flap 3 is loaded on the lower end of valve rod 14, place in the valve pocket, and corresponding with passage 2.Between the valve pocket inwall of valve body 1 and valve rod 14, be provided with Packing seat 4 and filler 19.Lower support frame 8 is equipped with by ending a screw 18 and splitting annulus 17 in the top of valve body 1, upper bracket 9 loads the top of support 8 by screw thread, the suitable for reading of valve body 1 is equipped with pressing plate 16 by straight pin 5, bolt 6 and nut 7, and the inner chamber that pressing plate 16 places upper bracket 9 is passed in the upper end of valve rod 14.The lower end surface of operation handwheel 13 is provided with square or Hexagon boss, and this boss places the upper-end surface corresponding groove of Stem Mut 12, makes that Stem Mut 12 also rotated thereupon when operation handwheel 13 rotated.Stem Mut 12 places in upper bracket 9 suitable for reading, between the outside and upper bracket 9 inwalls of Stem Mut 12, be equipped with bearing 10 between the outside of upper bracket 9 inwalls and valve rod 14, gland 11 is equipped with by screw thread in place suitable for reading at upper bracket 9, so that Stem Mut 12 is spacing in upper bracket 9, can not move up and down; The inner chamber of Stem Mut 12 links to each other by the upper end of screw thread with valve rod 14.Between the inwall of the outside of valve rod 14 and upper bracket 9, be provided with flat key 15.

When needs are opened stop valve, by rotary manipulation handwheel 13 deasil, rotate and drive with its fixing Stem Mut 12, Stem Mut 12 is owing to be subjected to spacing in upper bracket 9, only rotate and do not move up and down, thereby make the valve rod 14 that links to each other with its screw thread move upward and not rotate, the flap 3 that is loaded on valve rod 14 lower ends is also up thereupon, passage conducting 2, valve opening.When needs are closed stop valve, then rotate in the counterclockwise operation handwheel 13, rotate and drive with its fixing Stem Mut 12, Stem Mut 12 is owing to be subjected to spacing in upper bracket 9, only rotate and do not move up and down, thereby the feasible valve rod 14 that links to each other with its screw thread moves downward and do not rotate, the flap 3 that is loaded on valve rod 14 lower ends is also descending thereupon, blocking channel 2, valve closing.

Claims

1, a kind of stop valve comprises valve body, valve rod, flap, upper bracket, lower support frame and operation handwheel; Offer the passage that connects its valve pocket on the valve body, flap is loaded on the lower end of valve rod, place in the valve pocket, and corresponding with passage; Lower support frame is equipped with on the top of valve body, upper bracket loads the top of support by screw thread, the pressing plate that is equipped with suitable for reading of valve body, the inner chamber that pressing plate places upper bracket is passed in the upper end of valve rod, it is characterized in that: Stem Mut is equipped with in the lower end of operation handwheel, Stem Mut places in upper bracket suitable for reading, and spacing with gland; The inner chamber of Stem Mut links to each other with the upper end of valve rod by screw thread.

2, a kind of stop valve according to claim 1 is characterized in that: the lower end surface of aforesaid operations handwheel is provided with square or Hexagon boss, and this boss places the upper-end surface corresponding groove of Stem Mut.

3, a kind of stop valve according to claim 1 is characterized in that: between the outside and upper bracket inwall of Stem Mut, be equipped with bearing between the outside of upper bracket inwall and valve rod.

4, a kind of stop valve according to claim 1 is characterized in that: be provided with flat key between the inwall of the outside of valve rod and upper bracket.