CN204878804U - Structure is prevented changeing by multi -functional valve case - Google Patents

Abstract

The utility model relates to an anti-rotation structure for a valve core of a multifunctional valve, which comprises a valve seat, a valve core, a valve stem, a valve sleeve and an anti-rotation key. A valve sleeve is coaxially sealed between the valve sleeve above the valve seat and the outer periphery of the valve core, and a flow channel is formed on the valve sleeve to match the channel of the valve core; a valve stem is coaxially fixed on the upper end of the valve core , the upper end of the valve stem protrudes upwards from the valve cover, and an anti-rotation key is fixedly installed on the inner radial side of the valve cover, and the anti-rotation key is slidably embedded in a longitudinal keyway made on the radial side of the valve stem. The keyway type limit is adopted between the valve core and the valve stem in this structure to prevent the valve core from rotating in the valve chamber, ensure the consistency between the valve core and the valve sleeve flow channel hole, reduce flow resistance, and reduce erosion on the valve core and valve seat , Improve valve life.

Description

A multifunctional valve spool anti-rotation structure

technical field

The utility model belongs to the category of valves and relates to a multifunctional valve, in particular to an anti-rotation structure for a valve core of a multifunctional valve.

Background technique

At present, the interior of the conventional multi-function valve chamber mainly includes valve seat, valve sleeve, valve core and other components. The valve core is prone to rotate during the switching process of the existing multi-function valve, resulting in inconsistent flow channel holes between the valve core and the valve sleeve, resulting in The flow resistance is large, and the valve core and sleeve are eroded, which greatly reduces the service life of the valve.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a multifunctional valve core anti-rotation structure, which has less flow resistance and improves the service life of the valve.

The purpose of this utility model is achieved in that:

An anti-rotation structure for a multifunctional valve core, including a valve seat, a valve core, a valve stem, a valve sleeve and an anti-rotation key. A valve sleeve is coaxially sealed between the upper valve sleeve and the outer circumference of the valve core. The valve sleeve is formed with a flow channel that matches the channel of the valve core; a valve stem is coaxially fixed on the upper end of the valve core. The upper end protrudes upwards from the bonnet, which is characterized in that an anti-rotation key is fixed on the inner radial side of the bonnet, and the anti-rotation key is slidably embedded in a longitudinal keyway made on the radial side of the valve stem.

Moreover, a keyway type limiting structure is adopted between the valve core and the valve stem.

Moreover, the end of the valve rod connected with the valve core is formed with an oblong embedded hole, and the valve core is connected with the valve rod through a coaxially installed split ring and a pressure sleeve.

Moreover, the upper part of the valve stem protruding from the bonnet is shaped with an external thread, and a drive sleeve is installed through the coaxial engagement of the external thread. The drive sleeve is equipped with a handle on one side of the radial direction, and the drive sleeve is driven to rotate through the manual or electric drive handle.

Advantage and positive effect of the present utility model are:

The keyway type limit is adopted between the valve core and the valve stem in this structure to prevent the valve core from rotating in the valve chamber, ensure the consistency between the valve core and the valve sleeve flow channel hole, reduce flow resistance, and reduce erosion on the valve core and valve seat , Improve valve life.

Description of drawings

Figure 1 is a schematic diagram of the internal structure of the valve body;

FIG. 2 is a schematic partial cross-sectional view of part A in FIG. 1 .

The symbols in the accompanying drawings represent: 1 valve seat, 2 valve sleeve, 3 valve core, 4 pairs of open rings, 5 pressure sleeve, 6 valve stem, 7 anti-rotation key, 9 driving sleeve, 10 handle.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings; it should be noted that: this embodiment is descriptive, not restrictive, and cannot be used to limit the protection scope of the utility model.

A multifunctional valve core anti-rotation structure, including a valve seat 1, a valve core 3, a valve stem 6, a valve sleeve 2 and an anti-rotation key 7, described in the direction shown in Figure 1, the valve body is made of a transverse medium The flow channel, the upper end of the valve body is coaxially fixed with the valve cover in the longitudinal direction, the valve seat 1 is fixed in the valve body, and the valve core 3 is installed longitudinally slidingly in the valve seat. There is a channel for the medium to flow, and the channel of the valve core is closed by the valve seat when the valve is closed;

In order to ensure the tightness, a valve sleeve 2 is coaxially sealed between the valve sleeve above the valve seat and the outer circumference of the valve core. The valve sleeve is formed with a flow channel that matches the channel of the valve core. When the valve is opened, the valve core The channel is consistent with the flow channel of the valve sleeve;

A valve stem 6 is coaxially fixed on the upper end of the valve core longitudinally. The upper end of the valve stem protrudes upwards from the valve cover 9, and a drive sleeve 9 is installed through threaded coaxial engagement. A handle 10 is installed on the radial side of the drive sleeve. Or the electric drive handle drives the drive sleeve to rotate, thereby driving the valve stem to move longitudinally, and the valve stem drives the valve core to move longitudinally to open or close the valve;

The innovation point of the present utility model is:

An anti-rotation key 7 is fixed on the inner radial side of the valve cover. The anti-rotation key is slidably embedded in the keyway made on the radial side of the valve stem. The anti-rotation key can only slide longitudinally in the keyway to limit the valve stem. rotate;

The valve core and the valve stem adopt a keyway type limit structure, as shown in attached drawings 1 to 2, the end of the valve stem connected with the valve core is made with an oblong embedded hole, and through the coaxially installed opposite The open ring 4 and the pressure sleeve 5 connect the valve core with the valve stem, and there is no relative rotation between the valve stem and the valve core, so that the flow channel holes of the valve core and the valve sleeve are consistent when the valve is opened or closed.

When the valve is in the process of opening or closing, the valve core only moves longitudinally with the valve stem but does not rotate, so as to prevent the valve core from rotating during use and cause the problem of inconsistency between the valve core and the flow channel hole of the valve sleeve, and avoid flow The resistance increases, which reduces the erosion of the valve core and sleeve, and prolongs the life of the valve.

Although the embodiments and drawings of the utility model are disclosed for the purpose of illustration, those skilled in the art can understand that various replacements, changes and modifications can be made without departing from the spirit and scope of the utility model and the appended claims. It is possible, therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (4)

1. A multifunctional valve core anti-rotation structure, including a valve seat, a valve core, a valve stem, a valve sleeve and an anti-rotation key, the valve seat is fixed in the valve body, and the valve core is longitudinally slid in the valve seat; A valve sleeve is coaxially sealed between the valve sleeve above the valve seat and the outer circumference of the valve core. The valve sleeve is formed with a flow channel that matches the channel of the valve core; a valve stem is coaxially fixed on the upper end of the valve core. The upper end of the valve stem protrudes upwards from the valve cover, which is characterized in that: an anti-rotation key is fixed on the inner radial side of the valve cover, and the anti-rotation key is slidably embedded in a longitudinal keyway made on the radial side of the valve stem. 2. The multi-function valve spool anti-rotation structure according to claim 1, characterized in that: a keyway type limiting structure is adopted between the spool and the valve stem. 3. The multi-function valve spool anti-rotation structure according to claim 1, characterized in that: the end of the valve stem connected to the spool is formed with an oblong embedded hole, through the coaxially installed split ring and pressure A sleeve connects the spool to the stem. 4. The multi-function valve spool anti-rotation structure according to claim 1, characterized in that: the upper part of the valve stem protruding from the bonnet is made with external threads, and a drive sleeve is installed through the coaxial engagement of the external threads, and the drive sleeve A handle is installed on one radial side, and the drive sleeve is driven to rotate through the manual or electric drive handle.