CN210920196U

CN210920196U - Limiting device for valve

Info

Publication number: CN210920196U
Application number: CN201922104407.XU
Authority: CN
Inventors: 马嘉诚; 王新钢; 赵梁俊
Original assignee: Wuxi Qisheng Automatic Control Equipment Co ltd
Current assignee: Wuxi Qisheng Automatic Control Equipment Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-03
Anticipated expiration: 2029-11-29

Abstract

The utility model provides a stop device for valve, include: linking bridge, flat key, its characterized in that: connecting bracket installs on the turbine case, and valve rod front end passes inside the connecting bracket and is connected with the turbine case, and the inside track groove of having seted up of connecting bracket installs on the valve rod with track groove complex parallel key, this patent application utilizes track groove restriction parallel key motion stroke to the turned angle of restriction valve rod, thereby under the condition of turbine gear wearing and tearing, avoided the valve to open and close the inaccuracy of position, simple structure, with low costs.

Description

Limiting device for valve

Technical Field

The utility model belongs to ball valve is spacing field, especially relates to a stop device for valve.

Background

The drive of turbine case drive is selected for use mostly to the drive of heavy-calibre valve in present, and such valve just needs erection joint support, relies on the limitation of gear stroke to come spacingly during the drive of turbine case, but through opening for a long time and closing the back, the gear is difficult to avoid wearing and tearing to lead to the skew of on-off position, and then influence the service function of valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stop device for valve for the motion stroke of restriction valve rod realizes through following technical scheme: the method comprises the following steps: the valve comprises a connecting support and a flat key, wherein the connecting support is installed on a turbine box, the front end of a valve rod of the valve penetrates through the inside of the connecting support and is connected with the turbine box, a track groove is formed in the connecting support, and the flat key matched with the track groove is installed on the valve rod.

Preferably, the lower end of the connecting support is connected to the turbine box through a bolt, the upper end of the connecting support is provided with an upper end flange, a step is arranged in a center hole of the upper end flange, and a track groove is formed in the end face, perpendicular to the axis of the valve rod, of the step.

Preferably, the number of the track grooves is two, the two track grooves are not communicated, and four end parts of the two track grooves are distributed in an annular array.

Preferably, the flat keys are arranged in two numbers, the two flat keys are symmetrically distributed around the axis of the valve rod, and the two flat keys are fixed outside the valve rod through bolts.

The utility model has the advantages that: this patent application utilizes the flat key motion stroke of track groove restriction to the turned angle of restriction valve rod, thereby under the condition of turbine gear wearing and tearing, avoided the valve to open and the inaccuracy of closed position, simple structure, with low costs.

Drawings

FIG. 1 is a schematic view of the structure of the present patent application with respect to a connecting bracket;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the structure assembled with a turbine case and a valve using the present invention;

in the figure, 1-connecting the stent; 2-a turbine box; 3-valve stem of the valve; 4-a flat bond; 5. a track groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Shown in fig. 3, comprising: the valve comprises a connecting support and a flat key, wherein the connecting support is installed on a turbine box, the front end of a valve rod penetrates through the inside of the connecting support and is connected with the turbine box, a track groove is formed in the connecting support, and the flat key matched with the track groove is installed on the valve rod, so that the valve can be limited by the flat key and the track groove in the connecting support when being opened and closed.

The lower end of the connecting support is connected to the turbine box through a bolt, as shown in fig. 1 and 2, the upper end of the connecting support is provided with an upper end flange, a step is arranged in a center hole of the upper end flange, and a track groove is formed in the end face, perpendicular to the axis of the valve rod, of the step.

Preferably, the two track grooves are not communicated, and four ends of the two track grooves are distributed in an annular array and only allow the valve rod to rotate 90 degrees.

Preferably, the flat key is provided with two, two flat keys are distributed about the valve rod axis symmetry, two flat keys pass through the bolt fastening in the valve rod outside, utilize the track groove restriction flat key motion stroke to the turned angle of restriction valve rod, thereby under the condition of turbine gear wearing and tearing, avoided the valve to open and the inaccuracy of closed position.

The problem of on-spot pipeline valve because gear wear in the turbine leads to the valve switch not in place or cross position has been solved to this patent, under the cost that increases fewest, has realized "dual spacing" to the valve.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.

Claims

1. A stop device for valve includes: linking bridge, flat key, its characterized in that: the connecting support is installed on the turbine case, and valve rod front end passes inside the connecting support and is connected with the turbine case, and the inside track groove of having seted up of connecting support installs on the valve rod with track groove complex parallel key.

2. A stop device for a valve as defined in claim 1, wherein: the lower end of the connecting support is connected to the turbine box through a bolt, the upper end of the connecting support is provided with an upper end flange, a step is arranged in a center hole of the upper end flange, and a track groove is formed in the end face, perpendicular to the axis of the valve rod, of the step.

3. A stop device for a valve as defined in claim 2, wherein: the track groove is provided with two, does not communicate between two track grooves, and four tip in two track grooves are annular array distribution.

4. A stop device for a valve as defined in claim 3, wherein: the flat keys are arranged in two numbers, the two flat keys are symmetrically distributed about the axis of the valve rod, and the two flat keys are fixed to the outside of the valve rod through bolts.