CN211901590U

CN211901590U - Sleeve disk seat pressfitting structure for control valve

Info

Publication number: CN211901590U
Application number: CN201922091350.4U
Authority: CN
Inventors: 陈钟寿
Original assignee: Xuancheng Dekong Hanglian Fluid Control Technology Co ltd
Current assignee: Comsat Automation Group Co.,Ltd.
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-11-10
Anticipated expiration: 2029-11-27

Abstract

The utility model relates to a sleeve valve seat pressing structure for a control valve, which is arranged between a valve body and a valve cover, wherein the valve cover is arranged at the top of the valve body, and a flow passage is arranged in the valve body; a first stepped hole communicated with the flow channel is further formed in the valve body, the diameter of the first stepped hole is larger than that of the flow channel, and a bottom surface at the joint of the first stepped hole and the flow channel is naturally formed; a sleeve and a valve seat are arranged in the first step hole; a second stepped hole is formed in the valve cover, and the top of the sleeve is clamped in the second stepped hole; the sleeve is installed in the first stepped hole, the valve seat is installed at the bottom of the sleeve in an embedded mode, and the bottom surfaces of the sleeve and the valve seat are in contact with the bottom surface of the first stepped hole.

Description

Sleeve disk seat pressfitting structure for control valve

Technical Field

The utility model relates to the technical field of valves, specifically a sleeve disk seat pressfitting structure that control valve was used.

Background

Conventional control valves are expanded around two basic types of structures, one being a single seat control valve and the other being a sleeve control valve. The throttling characteristic of the single-seat control valve is completed by a plunger valve core with a specific profile, a single sealing surface is sealed, the sealing performance is good, but the unbalanced force of the borne fluid is large, and the single-seat control valve is not suitable for the working conditions of high differential pressure and unstable system. The sleeve control valve has throttling characteristic completed by sleeve window, and the valve core has pressure balancing hole and needs double sealing faces for sealing simultaneously. The sealing performance is poor, but the large unbalanced force from the fluid can be overcome, and the large pressure difference can be borne. In the case where a high pressure difference is required and sealing property is required, it is not appropriate to use one of the above-mentioned base types alone, and the two base types are combined. It is therefore necessary to provide a structure in which the two basic types are combined.

SUMMERY OF THE UTILITY MODEL

The utility model discloses just not enough to prior art exists provides a sleeve disk seat pressfitting structure that control valve was used.

In order to solve the above problems, the utility model adopts the following technical proposal:

a sleeve valve seat pressing structure for a control valve is arranged between a valve body and a valve cover, the valve cover is arranged at the top of the valve body, and a flow passage is arranged in the valve body; a first stepped hole communicated with the flow channel is further formed in the valve body, the diameter of the first stepped hole is larger than that of the flow channel, and a bottom surface at the joint of the first stepped hole and the flow channel is naturally formed; a sleeve and a valve seat are arranged in the first step hole; a second stepped hole is formed in the valve cover, and the top of the sleeve is clamped in the second stepped hole; the sleeve is installed in the first stepped hole, the valve seat is installed at the bottom of the sleeve in an embedded mode, and the bottom surfaces of the sleeve and the valve seat are in contact with the bottom surface of the first stepped hole.

As an improvement of the technical scheme, the second step hole is provided with a plurality of steps, and the top surface of the sleeve is in contact with one of the step surfaces to form a first clamping surface.

In an improvement of the above technical solution, a bottom surface of the valve seat contacts a bottom surface of the first stepped hole to form a second engaging surface.

As an improvement of the technical scheme, a step is arranged in the sleeve, and the top surface of the valve seat is in contact with the step surface in the sleeve to form a third clamping surface.

As an improvement of the technical scheme, the valve seat is cylindrical.

Compared with the prior art, the utility model discloses an implement the effect as follows:

the utility model discloses a set up sleeve disk seat structure in order to adapt to high pressure differential or unstable hydraulic pressure operating mode, through the disk seat that sets up the cylinder so that installation and pressfitting, with the disk seat block in telescopic inside, again with the sleeve pressfitting in the valve body, it is spacing by the valve gap compresses tightly at last, through the contact and the pressfitting of a plurality of faces and face, such multilayer pressfitting structure does not rely on to connect mechanical connection, and is more reliable and stable and install facility. Due to the fact that the pressing structure is adopted, the valve sealing structure has better sealing performance and sealing space, and is also suitable for the situation that the requirement on valve sealing is high.

Drawings

FIG. 1 is a schematic view of the installation of a sleeve with a valve seat;

FIG. 2 is a partial view A of FIG. 1;

FIG. 3 is a partial view B of FIG. 1;

FIG. 4 is a partial enlarged view C of FIG. 2;

FIG. 5 is a partial enlarged view D of FIG. 3;

fig. 6 is a partially enlarged view E of fig. 3.

In the figure: 1-valve body, 11-runner, 12-first shoulder hole, 2-valve cover, 21-second shoulder hole, 22-first clamping surface, 3-sleeve, 31-through hole, 4-valve seat, 41-second clamping surface, 42-third clamping surface, 5-valve core, 51-valve rod, 52-guide block, 6-gasket, 7-sealing net.

Detailed Description

The present invention will be described with reference to specific embodiments.

Fig. 1 is the installation sketch map of sleeve and disk seat, as shown in fig. 1, pressfitting structure sets up between valve body 1 and valve gap 2, valve gap 2 is installed the top of valve body 1, be equipped with runner 11 in the valve body 1. The valve body 1 is also internally provided with a first stepped hole 12 communicated with the flow channel 11, the diameter of the first stepped hole 12 is larger than that of the flow channel 11, and a bottom surface at the joint of the first stepped hole 12 and the flow channel 11 is naturally formed. The sleeve 3 and the valve seat 4 are installed in the first stepped hole 12. A second stepped hole 21 is formed in the bonnet 2, and the top of the sleeve 3 is clamped in the second stepped hole 21. The valve seat 4 is cylindrical.

The sleeve 3 is arranged in the first stepped hole 12, the valve seat 4 is arranged at the bottom of the sleeve 3 in an embedded mode, and the bottom surfaces of the sleeve 3 and the valve seat 4 are in contact with the bottom surface of the first stepped hole 12.

The device is provided with several layers of clamping positions. When the valve seat is installed, the valve seat 4 is pressed into the sleeve 3 to enable the bottom surfaces of the valve seat and the sleeve to be flush. This fitting is then fitted into the first stepped hole 12 so that the bottom surfaces of the sleeve 3 and the valve seat 4 are in contact with the bottom surface of the first stepped hole 12. Thus, the first press-fit position is formed between the outer surface of the sleeve 3 and the inner wall of the first stepped hole 12. The outer surface of the valve seat 4 forms a second press-fit position with the inner surface of the sleeve 3. And then the stepped surface of the second stepped hole 21 is pressed on the top of the sleeve 3 to form a limit for the matching. In conclusion, a complete set of pressing structure is completed. The advantage of this setting is that adopt the mode installation sleeve 3 and valve seat 4 of pressfitting for the installation is more stable firm, does not rely on the relation of connection of mechanical nature, therefore the inefficacy possibility is little, and easily installs. The valve seat 4 and the sleeve 3 are all contacted with the valve body 1, and do not depend on a connecting position independently, so that the reliability of the installation is higher. Therefore, the connection pressing mode is suitable for the situation of high pressure difference, and has sufficient space for using the hard sealing element.

Fig. 2 is a partial view a of fig. 1, and fig. 4 is a partial enlarged view C of fig. 2. as shown in fig. 2 and 4, the second stepped hole 21 has a plurality of steps, and the top surface of the sleeve 3 contacts with one of the step surfaces to form a first engaging surface 22. The first engagement surface 22 is provided to connect the bonnet 2 to the outside of the valve body 1 and restrict the axial movement of the sleeve 3.

Fig. 3 is a partial view B of fig. 1, and fig. 5 is a partial enlarged view D of fig. 3. as shown in fig. 3 and 5, the bottom surface of the valve seat 4 contacts the bottom surface of the first stepped hole 12 to form a second engaging surface 41. The second engaging surface 41 is provided to restrict the valve seat 4 between the inner wall of the valve body 1 and the inner wall of the sleeve 3, which makes the connection more stable and facilitates the work under high pressure difference.

Fig. 6 is a partial enlarged view E of fig. 3, and as shown in fig. 6, a step is provided inside the sleeve 3, and the top surface of the valve seat 4 contacts with the step surface inside the sleeve 3 to form a third engaging surface 42. The third engaging surface 42 cooperates with the first engaging surface 41 to fix the valve seat 4, and the third engaging surface 42 also functions as a positioning function when the valve seat 4 is installed in the sleeve 3.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A sleeve valve seat pressing structure for a control valve is arranged between a valve body (1) and a valve cover (2), the valve cover (2) is installed at the top of the valve body (1), and a flow channel (11) is arranged in the valve body (1); the valve is characterized in that a first stepped hole (12) communicated with the flow channel (11) is further formed in the valve body (1), the diameter of the first stepped hole (12) is larger than that of the flow channel (11), and a bottom surface at the joint of the first stepped hole (12) and the flow channel (11) is naturally formed; a sleeve (3) and a valve seat (4) are arranged in the first step hole (12); a second stepped hole (21) is formed in the valve cover (2), and the top of the sleeve (3) is clamped in the second stepped hole (21);

the sleeve (3) is arranged in the first stepped hole (12), the valve seat (4) is arranged at the bottom of the sleeve (3) in an embedded mode, and the bottom surfaces of the sleeve (3) and the valve seat (4) are in contact with the bottom surface of the first stepped hole (12).

2. The sleeve valve seat pressing structure for the control valve according to claim 1, wherein the second stepped hole (21) has a plurality of steps, and the top surface of the sleeve (3) contacts with one of the step surfaces to form the first engaging surface (22).

3. The sleeve valve seat pressing structure for the control valve according to claim 1, wherein the bottom surface of the valve seat (4) is in contact with the bottom surface of the first stepped hole (12) to form the second engaging surface (41).

4. The sleeve valve seat pressing structure for the control valve according to claim 1, wherein the sleeve (3) is provided with a step inside, and the top surface of the valve seat (4) is in contact with the step surface inside the sleeve (3) to form a third clamping surface (42).

5. The sleeve valve seat pressing structure for the control valve according to claim 1, wherein the valve seat (4) is cylindrical.