CN215334504U

CN215334504U - Two segmentation valve rod structures of valve

Info

Publication number: CN215334504U
Application number: CN202121291263.4U
Authority: CN
Inventors: 邬冬梅; 张轶
Original assignee: Jiangxi Gangbei Fluid Automatic Control Technology Co ltd
Current assignee: Jiangxi Gangbei Fluid Automatic Control Technology Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-12-28
Anticipated expiration: 2031-06-10

Abstract

A two-section type valve rod structure of a valve comprises an upper valve rod and a lower valve rod, wherein the upper valve rod and the lower valve rod are connected through a compensator; the upper portion of going up the valve rod and support threaded connection, the lower part and the compensator swing joint of going up the valve rod, the bottom and the case fixed connection of lower valve rod, lower valve rod and compensator swing joint, it is equipped with compression spring to go up between valve rod and the lower valve rod, compression spring is located the compensator inside, the side fixed connection of compensator prevents changeing the card, prevent changeing card and support swing joint, just prevent changeing the card and only can reciprocate along the support. This utility model discloses when becoming flexible or by wearing and tearing appear in lower valve rod, compression spring will make lower valve rod downstream automatically to the looseness volume or the wearing and tearing volume of compensation valve rod can make the case be located sealed position all the time, can not appear revealing the phenomenon, makes the sealing performance of valve more reliable, has improved the life of valve.

Description

Two segmentation valve rod structures of valve

Technical Field

The utility model belongs to the technical field of valves, and particularly relates to a two-section type valve rod structure of a valve.

Background

The valve is a pipeline accessory used for opening and closing a pipeline, controlling the flow direction, and regulating and controlling the parameters of temperature, pressure and flow of a conveying medium. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals, and radioactive media. The valve generally comprises a valve rod, wherein the valve rod is fixedly connected with a valve core, and the valve core is extruded through the movement of the valve rod, so that the valve core blocks a fluid channel to realize a sealing function; when the valve needs to be opened, only the actuating mechanism needs to be rotated reversely. The valve stem is therefore an essential important part of the valve. In the prior art, when a valve rod is loosened or abraded, leakage is easy to generate. Therefore, it is necessary to provide a valve stem structure having an automatic compensation function.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a two-section type valve rod structure of a valve, which solves the problems in the prior art.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a two-section type valve rod structure of a valve comprises an upper valve rod and a lower valve rod, wherein the upper valve rod and the lower valve rod are connected through a compensator; the upper portion of going up the valve rod and support threaded connection, the lower part and the compensator fixed connection of going up the valve rod, the bottom and the case swing joint of lower valve rod, lower valve rod and compensator swing joint, it is equipped with compression spring to go up between valve rod and the lower valve rod, compression spring is located the compensator inside, the side fixed connection of compensator prevents changeing the card, prevent changeing card and support swing joint, just prevent changeing the card and only can reciprocate along the support.

On the basis of the scheme, as a preferable scheme of the scheme, the upper valve rod comprises a trapezoidal screw rod and a trapezoidal nut, the trapezoidal screw rod is in threaded connection with the trapezoidal nut, the trapezoidal nut extends out of the top end of the support, and the trapezoidal nut is rotatably connected with the support.

On the basis of the above scheme and as a preferable scheme of the above scheme, a bearing is arranged between the trapezoidal nut and the bracket.

On the basis of the above scheme and as the preferred scheme of the above scheme, one side of the lower valve rod, which is close to the upper valve rod, is provided with an annular clamping groove, a clamping ring is arranged in the clamping groove, the outer diameter of the clamping ring is larger than the diameter of the lower valve rod, a stepped hole is arranged in the compensator, and the clamping ring is positioned in the stepped hole.

On the basis of the above scheme and as a preferred scheme of the above scheme, the compression spring is a belleville spring, a large end of the compression spring is mutually abutted with the upper valve rod, and a small end of the compression spring is mutually abutted with the lower valve rod.

On the basis of the scheme, and as a preferable scheme of the scheme, the bottom of the lower valve rod is provided with an insertion hole, the side surface of the lower valve rod is provided with a waist-shaped hole, and the waist-shaped hole is intersected with the insertion hole.

On the basis of the scheme, and as a preferable scheme of the scheme, the top of the upper valve rod is connected with a hand wheel.

The utility model has the following beneficial effects: when the lower valve rod is loosened or abraded, the compression spring automatically enables the lower valve rod to move downwards to compensate the looseness or abrasion of the valve rod, so that the valve core can be always positioned at a sealing position, the leakage phenomenon can not occur, the sealing performance of the valve is more reliable, and the service life of the valve is prolonged; the trapezoidal screw rod can be driven to rotate by rotating the trapezoidal nut, so that the threaded connection between the upper valve rod and the support is changed into the rotary connection, and the support is prevented from being abraded; the compression spring is a belleville spring, so that the space in the compensator can be fully utilized, and the contact area between the compression spring and the upper valve rod and between the compression spring and the lower valve rod is maximized; the bottom of the lower valve rod is provided with a jack and a kidney-shaped hole, which is convenient for being connected with the valve core.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of a portion of the structure of the present invention.

FIG. 3 is a cross-sectional view of the lower stem.

The reference numbers are as follows:

1. an upper valve stem; 101. a trapezoidal screw rod; 102. a trapezoidal nut; 2. a lower valve stem; 201. a card slot; 202. a jack; 203. a kidney-shaped hole; 3. a compensator; 4. a support; 5. a valve core; 6. a compression spring; 7. an anti-rotation clamp; 8. a bearing; 9. a snap ring; 10. a hand wheel; 11. a valve body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the two-section valve rod structure of the valve comprises an upper valve rod 1 and a lower valve rod 2, wherein the upper valve rod 1 and the lower valve rod 2 are connected through a compensator 3; go up the upper portion and the support 4 threaded connection of valve rod 1, the lower part and the 3 fixed connection of compensator of last valve rod 1, the bottom and the 5 swing joint of case of lower valve rod 2, lower valve rod 2 and the 3 swing joint of compensator, upward be equipped with compression spring 6 between valve rod 1 and the lower valve rod 2, compression spring 6 is located the inside of compensator 3, the card 7 is prevented changeing by the side fixed connection of compensator 3, prevent changeing card 7 and support 4 swing joint, just prevent changeing card 7 and only can reciprocate along support 4.

When the anti-rotation clamp is used, the trapezoidal nut 102 is rotated, and the upper valve rod is in threaded connection with the trapezoidal nut 102, so that the support is rotationally connected with the trapezoidal nut 102, and the upper valve rod drives the compensator and the anti-rotation clamp to move downwards together. The compression spring is extruded while moving downwards, so that the compression spring is contracted, and the lower valve rod is pressed by the compression spring after the compression spring is contracted to the limit; continued rotation of the acme nut 102 causes the lower stem to move downwardly and compress the valve cartridge, which is located in a sealing position within the valve body 11, thus closing the valve. When the lower valve rod is loosened or abraded, the compression spring is in a compression state, so that the lower valve rod automatically moves downwards to compensate the loosening amount or the abrasion amount of the valve rod, the valve core can be always located at a sealing position, the leakage phenomenon cannot occur, the sealing performance of the valve is more reliable, and the service life of the valve is prolonged.

The upper valve rod 1 comprises a trapezoidal screw rod 101 and a trapezoidal nut 102, the trapezoidal screw rod 101 is in threaded connection with the trapezoidal nut 102, the trapezoidal nut 102 extends out of the top end of the support 4, and the trapezoidal nut 102 is rotatably connected with the support 4. Through rotating the trapezoidal nut alright drive trapezoidal lead screw and rotate, make the threaded connection between upper valve rod and the support change into and rotate and be connected, avoided wearing and tearing support.

And a bearing 8 is arranged between the trapezoidal nut 102 and the bracket 4, so that the friction force between the trapezoidal nut and the bracket is reduced, and the trapezoidal nut is convenient to rotate.

One side that lower valve rod 2 is close to last valve rod 1 is equipped with an annular draw-in groove 201, be equipped with snap ring 9 in the draw-in groove 201, the external diameter of snap ring 9 is greater than lower valve rod 2's diameter, be equipped with the shoulder hole in the compensator 3, snap ring 9 is arranged in the shoulder hole, makes lower valve rod joint in the compensator with rotating.

The compression spring 6 is a belleville spring, the large end of the compression spring 6 is abutted against the upper valve rod 1, and the small end of the compression spring 6 is abutted against the lower valve rod 2. The space in the compensator is fully utilized, so that the contact area of the compression spring with the upper valve rod and the lower valve rod is maximized.

The bottom of the lower valve rod 2 is provided with an insertion hole 202, the side surface of the lower valve rod 2 is provided with a waist-shaped hole 203, and the waist-shaped hole 203 is intersected with the insertion hole 202. When the valve core is used, the valve core is inserted into the jack, the screw rod is inserted into the waist-shaped hole, the screw rod is in threaded connection with the valve core, and therefore the lower valve rod can be connected with the valve core.

The top of the upper valve rod 1 is connected with a hand wheel 10 which is convenient to rotate so as to open or close the valve.

In practice, in order to increase the friction between the valve stem and the support, the lower valve stem is usually passed through a packing which is fixedly arranged inside the gland. At the moment, the upper valve rod and the lower valve rod enable three-point contact between the valve rod and the trapezoidal nut, the filler and the valve seat to be changed into two-point contact between the lower valve rod and the filler and the valve seat, and distortion and deformation of the valve rod caused by uneven stress are avoided.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a two segmentation valve rod structures of valve which characterized in that: the valve rod assembly comprises an upper valve rod (1) and a lower valve rod (2), wherein the upper valve rod (1) is connected with the lower valve rod (2) through a compensator (3); go up the upper portion and support (4) threaded connection of valve rod (1), go up the lower part and compensator (3) fixed connection of valve rod (1), the bottom and case (5) swing joint of lower valve rod (2), lower valve rod (2) and compensator (3) swing joint, it is equipped with compression spring (6) to go up between valve rod (1) and lower valve rod (2), compression spring (6) are located compensator (3) inside, card (7) are prevented to the side fixedly connected with of compensator (3), prevent changeing card (7) and support (4) swing joint, just prevent changeing card (7) and only can reciprocate along support (4).

2. A two-stage valve stem structure of a valve as claimed in claim 1, wherein: the upper valve rod (1) comprises a trapezoidal screw rod (101) and a trapezoidal nut (102), the trapezoidal screw rod (101) is in threaded connection with the trapezoidal nut (102), the trapezoidal nut (102) extends out of the top end of the support (4), and the trapezoidal nut (102) is rotatably connected with the support (4).

3. A two-stage valve stem structure of a valve as claimed in claim 2, wherein: and a bearing (8) is arranged between the trapezoidal nut (102) and the bracket (4).

4. A two-stage valve stem structure of a valve as claimed in claim 1, wherein: one side that lower valve rod (2) is close to last valve rod (1) is equipped with an annular draw-in groove (201), be equipped with snap ring (9) in draw-in groove (201), the external diameter of snap ring (9) is greater than the diameter of lower valve rod (2), be equipped with the shoulder hole in compensator (3), snap ring (9) are located the shoulder hole.

5. The two-stage valve stem structure of claim 4, wherein: the compression spring (6) is a butterfly spring, the large end of the compression spring (6) is mutually abutted against the upper valve rod (1), and the small end of the compression spring (6) is mutually abutted against the lower valve rod (2).

6. A two-stage valve stem structure of a valve as claimed in claim 1, wherein: the bottom of lower valve rod (2) is equipped with jack (202), the side of lower valve rod (2) is equipped with waist type hole (203), waist type hole (203) intersect with jack (202).

7. A two-stage valve stem structure of a valve as claimed in claim 1, wherein: the top of the upper valve rod (1) is connected with a hand wheel (10).