CN217927202U - Control valve - Google Patents

Abstract

The utility model provides a control valve, including the case, the case includes first hole section and second hole section at least, and first hole section includes the hole bottom surface, and the second hole section includes first drill way, and first drill way is located the pore of first hole section and the pore department of linking to each other of second hole section, and first drill way is higher than the minimum of hole bottom surface. Compared with the background art, the bottom surface of the hole is arranged, so that the risk that the valve core is blocked when impurities enter the valve core and the valve body is reduced, and the action reliability of the control valve is improved.

Description

Control valve

Technical Field

The utility model relates to a fluid control technical field particularly, relates to a control valve.

Background

Control valve products are widely used. Fig. 1 is a schematic cross-sectional view of a control valve of the background art. As shown in fig. 1, the control valve includes a valve body 01, a piston 02, an inlet pipe 03, and an outlet pipe 04. The piston 02 is axially slidable with respect to the valve body 01 to abut against or separate from the valve port portion 011 of the valve body 01. The piston 02 includes a balance hole 021, when the control valve is in a valve closing state as shown in fig. 1, fluid flowing in from the inlet pipe 03 can flow into the upper part of the piston 02 through the balance hole 021, and impurities are possibly brought between the outer peripheral wall of the piston 02 and the inner wall of the valve body 01 due to the fact that the fluid is doped with the impurities, so that the piston 02 is blocked, and the action reliability of the control valve is affected.

Therefore, how to reduce the influence of the impurities on the operation reliability of the control valve is a problem to be considered by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a control valve, including the valve body part, control valve still includes the case, the case can for valve body axial displacement, the case can the butt the valve port portion of control valve, the valve pocket includes epicoele and cavity of resorption, the epicoele is located the top of case, the cavity of resorption is located the below of case, the case includes the balancing hole, the balancing hole includes first hole section and second hole section at least, the pore of first hole section direct or indirect with the epicoele intercommunication, the pore of second hole section direct or indirect with the cavity of resorption intercommunication, the pore of first hole section with the pore intercommunication of second hole section, first hole section includes the hole bottom surface, the second hole section includes first drill way, first drill way is located the pore of first hole section with the pore of second hole section links to each other the department, first drill way is higher than the lowest point of hole bottom surface.

The control valve of the present embodiment includes a valve element that includes at least a first hole section and a second hole section, the first hole section including a hole bottom surface, the second hole section including a first orifice, the first orifice being located at a connection of a hole passage of the first hole section and a hole passage of the second hole section, the first orifice being higher than a lowest point of the hole bottom surface. Compared with the prior art, the bottom surface of the hole is arranged, so that the risk of clamping the valve core caused by the fact that impurities enter between the valve core and the valve body is reduced, and the action reliability of the control valve is improved.

Drawings

FIG. 1: a schematic cross-sectional view of a control valve of the background art;

FIG. 2: the utility model provides a section schematic diagram of a control valve in a closed valve state;

FIG. 3: FIG. 2 is a schematic cross-sectional view of the cartridge;

FIG. 4: fig. 3 is a schematic cross-sectional view of a modification of the valve body.

Symbolic illustration in fig. 2-4:

1-valve body component, 10-valve cavity;

101-upper chamber, 102-lower chamber;

11-valve body, 12-valve seat, 121-valve port;

2/2' -valve core, 21-first hole section;

211-well floor, 212-well wall;

213-straight hole section, 214-taper hole section;

22/22' -second pore section, 20-equilibrium flow path;

221/221' -first orifice, 222-second orifice;

23-large diameter section, 230-annular groove;

24-small diameter section, 25-pilot flow path;

3-a sealing ring;

an A-fluid inlet and a B-fluid outlet.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are used for clarity and convenience of the technical solution, and it should be understood that the terms used herein should not be construed as limiting the scope of the claims.

Fig. 2 is a schematic cross-sectional view of a control valve in a closed state according to the present invention;

FIG. 3 is a cross-sectional schematic view of the valve cartridge of FIG. 2; fig. 4 is a schematic cross-sectional view of a modification of the valve body shown in fig. 3.

As shown in fig. 2. The control valve comprises a valve body component 1 and a valve core 2. The valve body component 1 comprises a valve body 11 and a valve seat 12, and the valve body 11 is fixedly connected with the valve seat 12. The valve seat 12 includes a valve port portion 121, the valve element 2 is located in the valve chamber 10 of the control valve, and the valve element 2 can move axially relative to the valve body 11 to abut against or move away from the valve port portion 121.

In this embodiment, the valve chamber 10 includes an upper chamber 101 and a lower chamber 102, the upper chamber 101 being located above the valve spool 2 and the lower chamber 102 being located below the valve spool 2. The valve core 2 comprises a balance hole 20, the balance hole 20 comprises a first hole section 21 and a second hole section 22, a hole passage of the first hole section 21 is directly or indirectly communicated with the upper cavity 101, a hole passage of the second hole section 22 is directly or indirectly communicated with the lower cavity 102, and a hole passage of the first hole section 21 is communicated with a hole passage of the second hole section 22. The control valve includes a fluid inlet a and a fluid outlet B. When the control valve is in a closed state (a state shown in fig. 2), the valve element 2 abuts against the valve port portion 121, and at this time, high-pressure fluid at the fluid inlet a enters the lower chamber 102, the lower chamber 102 is a high-pressure region, the upper chamber 101 is a low-pressure region, and the fluid flows from the lower chamber 102 to the upper chamber 101 through the pore canal of the first pore section 21 and the pore canal of the second pore section 22. Specifically, the first hole section 21 includes a hole bottom surface 211, the second hole section 22 includes a first hole opening 221, the first hole opening 221 is located at a position where a hole passage of the first hole section 21 is connected with a hole passage of the second hole section 22, and the first hole opening 221 is higher than the lowest point of the hole bottom surface 211.

In the present embodiment, the valve core 2 is provided with a first hole section 21 and a second hole section 22, the first hole section 21 includes a hole bottom surface 211, and the first orifice 221 of the second hole section 22 is higher than the lowest point of the hole bottom surface 211. Compared with the prior art, the hole bottom surface 211 of the first hole section 21 can accumulate impurities in the fluid, and the risk that the impurities enter between the valve core 2 and the valve body 11 to cause the valve core 2 to be stuck is reduced.

Of course, it is contemplated that the balancing bore 20 may also include a third bore segment (not shown) that is positioned below the second bore segment 22, in which case the bore of the second bore segment 22 is in indirect communication with the lower chamber 102 via the bore of the third bore segment.

The present application will be described by taking an example in which the valve element 2 is provided with two hole sections.

As shown in fig. 2 and 3, the first bore section 21 extends along the longitudinal direction of the valve core 2, and the second bore section 22 extends along the longitudinal direction of the valve core 2, i.e. the central axis of the first bore section 21 is substantially parallel to the central axis of the second bore section 22, where "substantially parallel" means that the two central axes are allowed to deviate by 5 °, i.e. the included angle formed by the two central axes is less than 5 °. And the central axis of the second bore section 22 is further away from the central axis of the spool 2 than the central axis of the first bore section 21, i.e. the first aperture 221 is located at the edge of the bore bottom surface 211. So arranged, it is beneficial to accumulate impurities at the bottom surface 211 of the hole.

Further, the first hole section 21 is specifically a round hole, the second hole section 22 is specifically a round hole, the diameter of the first hole section 21 is defined as D, and the diameter of the second hole section 22 is defined as D, which satisfies: d is more than 2D. With this arrangement, the larger the area of the hole bottom surface 211, the better the ability of the first hole section 21 to accommodate impurities without changing the diameter d of the second hole section 22, i.e., without changing the flow capacity of the balancing hole 20.

As a specific embodiment, the valve core 2 includes a large diameter section 23 and a small diameter section 24, an outer peripheral wall of the large diameter section 23 is in clearance fit with an inner peripheral wall of the valve body 11, the first hole section 21 and the second hole section 22 are located in the large diameter section 23, and the large diameter section 23 includes an annular groove 230. The control valve further comprises a sealing ring 3, the sealing ring 3 is annular and made of plastic, the sealing ring 3 is located in the annular groove 230, and the outer peripheral wall of the sealing ring 3 is in sliding fit with the inner peripheral wall of the valve body 11. The second bore section 22 further comprises a second aperture 222, the second aperture 222 being located below the sealing ring 3. The small diameter section 24 can abut the valve port portion 121.

In this embodiment, the valve core 2 is made of stainless steel, the first hole section 21 includes a straight hole section 213 and a tapered hole section 214, the length H1 of the straight hole section 213 is greater than the length of the second hole section H2, and the tapered hole section 214 includes the hole bottom surface 211. The bottom surface 211 of the hole is low in the middle and high in the edge, and the longitudinal section of the hole is conical, so that impurities can be stored.

The valve spool 2 further comprises a pilot flow path 25, the pilot flow path 25 is located at the center of the valve spool 2, the orifice of the first orifice section 21 is located radially outside the pilot flow path 25, and when the control valve is in a valve-closed state, the fluid inlet a communicates with the lower chamber 102, and the fluid outlet B communicates with the pilot flow path 25.

As a modification, as shown in fig. 4, the difference from the above embodiment is the provision of the second bore section 22 'of the spool 2'. The second bore section 22' is disposed to extend obliquely with respect to the longitudinal direction of the valve core 2', and further, an included angle α formed by the central axis of the first bore section 21 and the central axis of the second bore section 22' satisfies: alpha is more than 10 degrees and less than 80 degrees. The second bore section 22' includes a first aperture 221', the first aperture 221' being located in the bore wall surface 212. Thus, the complete bottom surface 211 of the hole is more favorable for accumulating impurities than the previous embodiments.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A control valve comprising a valve body component including a valve body, characterized in that,

the control valve further comprises a valve core, the valve core can move axially relative to the valve body, the valve core can abut against a valve port of the control valve, the valve cavity comprises an upper cavity and a lower cavity, the upper cavity is located above the valve core, the lower cavity is located below the valve core, the valve core comprises a balance hole, the balance hole at least comprises a first hole section and a second hole section, a hole passage of the first hole section is directly or indirectly communicated with the upper cavity, a hole passage of the second hole section is directly or indirectly communicated with the lower cavity, the hole passage of the first hole section is communicated with a hole passage of the second hole section, the first hole section comprises a hole bottom surface, the second hole section comprises a first hole opening, the first hole opening is located at a connecting position of the hole passage of the first hole section and the hole passage of the second hole section, and the first hole opening is higher than the lowest point of the hole bottom surface.

2. The control valve of claim 1, wherein the first bore section is disposed along a longitudinal extension of the spool, the second bore section is disposed along a longitudinal extension of the spool, a central axis of the second bore section is further from the central axis of the spool than the central axis of the first bore section, and the first orifice is located at the bottom bore surface.

3. The control valve of claim 1, wherein the first bore section extends longitudinally of the spool, the second bore section extends obliquely relative to the longitudinal direction of the spool, the first bore section further includes a bore wall surface, and the second bore section includes a first orifice located in the bore wall surface.

4. The control valve of claim 1, wherein the first bore section is a circular bore, the second bore section is a circular bore, a diameter of the first bore section is defined as D, and a diameter of the second bore section is defined as D, such that: d is more than 2D.

5. The control valve of claim 1, wherein the valve body member includes a valve body and a valve seat, the valve body is fixedly connected to the valve seat, the valve seat includes the valve port portion, the valve element includes a major diameter section and a minor diameter section, an outer peripheral wall of the major diameter section is in clearance fit with an inner peripheral wall of the valve body, the first bore section and the second bore section are located in the major diameter section, the major diameter section includes an annular groove, the control valve further includes a sealing ring located in the annular groove, an outer peripheral wall of the sealing ring is in sliding fit with the inner peripheral wall of the valve body, the second bore section includes a second orifice located below the sealing ring, and the minor diameter section is capable of abutting against the valve port portion.

6. The control valve of any one of claims 1-5, wherein the valve spool is made of stainless steel, the first bore section includes a straight bore section and a tapered bore section, the straight bore section having a length greater than a length of the second bore section, the tapered bore section including the bore bottom surface.

7. The control valve of any of claims 1-5, wherein the spool includes a pilot flow path, the pilot flow path being located at a center of the spool, the orifice of the first bore section being located radially outward of the pilot flow path, the control valve including a fluid inlet and a fluid outlet, the fluid inlet communicating with the lower chamber and the fluid outlet communicating with the pilot flow path when the control valve is in a closed state.

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