CN217784266U

CN217784266U - Control valve

Info

Publication number: CN217784266U
Application number: CN202221565151.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2022-03-31
Filing date: 2022-06-21
Publication date: 2022-11-11
Anticipated expiration: 2032-06-21

Abstract

The utility model discloses a control valve, including the valve rod, the valve rod includes main part, first key portion and second key portion, and the pore wall clearance fit in periphery wall and the formation valve rod hole of main part sets for the main part and is S1 along the fore-and-aft projection of valve rod, and first key portion is S2 along the fore-and-aft projection of valve rod, and second key portion is S3 along the fore-and-aft projection of valve rod, then satisfies: s1 covers S2 and S1 covers S3. Compared with the background technology, the scheme reduces the cost of the valve rod.

Description

Control valve

Technical Field

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

Background

Fig. 1 is a partial cross-sectional view of a ball valve of the background art. As shown in fig. 1, the ball valve includes a valve body 01, a valve seat 02, a valve stem 03 and a valve ball 04, wherein the valve body 01 and the valve seat 02 are welded and fixed. The valve rod 03 is arranged on the valve body 01 in a penetrating mode, and the valve rod 03 is connected with the valve ball 04 through a key groove. The valve body 01 is provided with an inner step portion 011, the valve rod 03 is provided with a flange portion 031, and the flange portion 031 is matched with the inner step portion 011 to limit the valve rod 03 to move upwards along the longitudinal direction. In this valve rod flip-chip structure, because the valve rod 03 is equipped with flange portion 031, the volume of the car processing of valve rod 03 is more, satisfying under the prerequisite of the vertical limit structure of valve body 01 and valve rod 03, how to optimize the structure of valve rod 03 and provide the subject of improvement for technical staff in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control valve, including valve body, valve rod and case, the valve body includes the valve rod hole, the valve rod runs through the valve rod hole, the case is located the inner chamber of control valve, the valve rod includes main part, first key portion and second key portion, the periphery wall of main part with form the pore wall clearance fit in valve rod hole, first key portion is located the top of main part, second key portion is located the below of main part, second key portion part at least is located the groove of case, the valve rod can drive the case rotates, the valve body includes step face lower step portion down, lower step portion an organic whole form in the valve body, the main part includes step face ascending valve rod, valve rod step portion can with lower step portion offsets in order to restrict the valve rod vertically upwards moves, sets for the main part follows the longitudinal projection of valve rod is S1, first key portion follows the longitudinal projection of valve rod is S2, the second key portion follows the longitudinal projection of valve rod is S3, then satisfies: s1 covers S2 and S1 covers S3.

The application provides a control valve, including the valve rod, the valve rod includes main part, first key portion and second key portion, and the wall of periphery of main part and the pore wall clearance fit who forms the valve rod hole set for the main part and be S1 along the fore-and-aft projection of valve rod, and first key portion is S2 along the fore-and-aft projection of valve rod, and the second key portion is S3 along the fore-and-aft projection of valve rod, then satisfies: s1 covers S2, S1 covers S3. Compared with the background technology, the scheme reduces the cost of the valve rod.

Drawings

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

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

FIG. 3: an enlarged schematic view at I1 in fig. 2;

FIG. 4: an enlarged schematic view at I2 in fig. 2;

FIG. 5 is a schematic view of: FIG. 2 is a schematic illustration of the valve stem configuration;

FIG. 6: FIG. 2 is a schematic view of the structure of a stop ring;

FIG. 7: FIG. 2 is a schematic view of a first valve seat;

FIG. 8: fig. 2 is a schematic structural view of the second valve seat.

In fig. 2 to 8:

1-shell, 10-valve cavity;

11-a body portion;

12-bulge, 120-bulge lumen;

2-a first valve seat, 21-a first base;

22-first connection, 23-second connection;

24-a first inner step portion;

2 '-second valve seat, 21' -second base;

22 '-a third connecting portion, 23' -a fourth connecting portion;

24' -a second inner step portion;

3-joint, 30-valve stem bore;

31-upper step, 32-outer step;

33-lower step portion;

4-a first connection tube, 4' -a second connection tube;

5-valve stem, 51-body portion;

510-annular groove, 52-first key;

53-second key, 54-stem step;

6-valve core, 60-groove;

7-a first gasket, 7' -a second gasket;

8-stop ring, 80-mating hole;

9-sealing ring.

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

It should be noted that the terms "upper" and "lower" and the like as used herein are defined in the drawings and the positions of the components relative to each other in fig. 2, and are only used for clarity and convenience of the technical solution. It is to be understood that the directional terms used herein are not intended to limit the scope of the claims.

Fig. 2 is a schematic cross-sectional view of a control valve provided in the present invention; FIG. 3 is an enlarged schematic view at I1 of FIG. 2; FIG. 4 is an enlarged schematic view at I2 of FIG. 2; FIG. 5 is a schematic illustration of the valve stem of FIG. 2; FIG. 6 is a schematic view of the stop ring of FIG. 2; FIG. 7 is a schematic view of the first valve seat of FIG. 2; fig. 8 is a structural schematic diagram of the second valve seat in fig. 2.

As shown in the figure, the control valve includes a valve body, a first valve seat 2, a first nipple 4, a valve stem 5, and a valve core 6. The valve body is fixedly connected to the first valve seat 2 and comprises a valve rod bore 30. The valve element 6 is substantially spherical and is located in the valve chamber 10 of the control valve, the valve element 6 comprising an upper groove 60. The valve stem 5 is machined from stainless steel bar stock and the valve stem 5 extends through the valve stem bore 30. Specifically, the valve stem 5 includes a main body 51, a first key 52, and a second key 53, the main body 51 having a cylindrical shape, the first key 52 being located above the main body 51, and the second key 53 being located below the main body 51. The outer peripheral wall of the main body portion 51 is in clearance fit with the wall of the bore forming the stem bore 30, the main body portion 51 including a stem step 54 with the step facing upward. The first key part 52 is partially exposed above the valve body so as to facilitate the operation of the first key part 52 by an external tool, the second key part 53 is at least partially positioned in the groove 60 of the valve core 6, the valve rod 5 is in keyway connection with the valve core 6, and the valve rod 5 can drive the valve core 6 to rotate circumferentially to control the opening and closing of the control valve.

In this scheme, the valve body specifically includes casing 1 and joint 3, casing 1 with connect 3 fixed connection, both specifically through welded fastening. The joint 3 is hollow as a component, and the joint 3 includes the aforementioned stem hole 30. The adapter 3 is made of stainless steel section material by turning, and comprises a downward step 33 with a downward step, and the valve rod step 54 can abut against the step 33 to limit the valve rod 5 from moving upwards along the longitudinal direction of the control valve. The lower step portion 33 is integrally formed with the joint 3, and is resistant to the impact of the valve stem 5, and is highly reliable.

If the projection of the main body portion 51 in the longitudinal direction of the valve stem 5 is S1, the projection of the first key portion 52 in the longitudinal direction of the valve stem 5 is S2, and the projection of the second key portion 53 in the longitudinal direction of the valve stem 5 is S3, the following conditions are satisfied: s1 covers S2, S1 covers S3. The main body part 51 of the valve rod matched with the hole wall of the valve rod hole 30 has the largest outer diameter, and compared with the background technology, the valve rod can save materials and reduce the amount of lathing, thereby reducing the material and processing cost.

The control valve further comprises a sealing ring 9, the sealing ring 9 being made of a rubber material. The main body 51 includes an annular groove 510, the seal ring 9 is disposed in the annular groove 510, and the seal ring 9 elastically abuts between a groove wall of the annular groove 510 and a wall of the stem hole 30.

The control valve further comprises a stop collar 8, the stop collar 8 being stamped from sheet metal. The joint 3 further comprises an upper step part 31 with an upward step surface, the stop ring 8 is arranged on the upper step part 31, and the stop ring 8 is fixedly welded with the joint 3. The step surface of the upper step part 31 is in a ring shape, the step surface of the lower step part 33 is in a ring shape, the inner diameter of the step surface of the upper step part 31 is the same as the inner diameter of the step surface of the lower step part 33, the outer diameter of the step surface of the upper step part 31 is larger than the outer diameter of the step surface of the lower step part 33, namely, the width of the step surface of the upper step part 31 is larger than the width of the step surface of the lower step part 33. So set up, increased the cooperation area of retaining ring 8 with last step portion 31, do benefit to and improve welding quality between them.

As a specific example, the stop ring 8 includes a fitting hole 80, the first key portion 52 penetrates the fitting hole 80, and the first key portion 52 can abut against a hole wall of the fitting hole 80 to limit a rotation space of the valve rod 5.

Further, the housing 1 is formed by stamping and drawing a stainless steel pipe, and includes a main body 11 and a protruding portion 12, the protruding portion 12 protrudes from the circumferential outer wall of the main body 11, the main body 11 is cylindrical, and the protruding portion 12 is annular. The joint 3 further comprises an outer step portion 32 with a downward step surface (facing the valve core 3), the protruding portion 12 is positioned in contact with the step surface of the outer step portion 32, the step wall of the outer step portion 32 is located in the inner cavity 120 of the protruding portion 12, and the protruding portion 12 and the outer step portion 32 are fixed in a welding mode. By providing the outer step portion 32 on the joint 3, the projection 12 is brought into contact with the step surface of the outer step portion 31 to achieve positioning, and the positioning accuracy when the joint 3 is welded to the housing 1 is improved.

The first valve seat 2 is formed by stamping a metal plate, the first valve seat 2 includes a first base 21, a first connecting portion 22 and a second connecting portion 23, the first base 21 is annular, the first connecting portion 22 is tubular, the first connecting portion 22 extends from an outer edge portion of the first base 21 toward the valve body (housing 1), the second connecting portion 23 is tubular, the second connecting portion 23 extends from an inner edge portion of the first base 21 toward the first connecting pipe 4, that is, the first connecting portion 22 and the second connecting portion 23 are located on different sides of the first base 21. Further, the first connecting portion 22 is provided coaxially with the second connecting portion 23, and the inner diameter of the first connecting portion 22 is larger than the outer diameter of the second connecting portion 23. The housing 1 is fixedly connected with the first connecting portion 22 by welding or screw threads, and the first connecting pipe 4 is fixedly connected with the second connecting portion 23 by welding or screw threads. The valve seat of the embodiment is simple in structure, does not need to be machined, and is convenient to machine.

The first valve seat 2 includes a first inner step portion 24 having a step surface facing the valve element 6, and the first inner step portion 24 is constituted by the first base portion 21 and the first connection portion 22. The control valve further comprises a first sealing gasket 7, the first sealing gasket 7 is arranged on the first inner step portion 24, and the first sealing gasket 7 abuts against the valve core 6 to support the valve core 6. The first valve seat 2 supports the first gasket 7 and the valve core 6 through the first inner step portion 24 formed by stamping, and the structure is simple.

The control valve further comprises a second valve seat 2', a second nipple 4'. The second valve seat 2' is of the same construction as the first valve seat 2, and is stamped from sheet metal and is arranged symmetrically with respect to the central axis of the projection 12 of the housing 1. Specifically, the second valve seat 2 'includes a second base portion 21', a third connecting portion 22', and a fourth connecting portion 23', the second base portion 21 'is annular, the third connecting portion 22' is tubular, the third connecting portion 22 'extends from an outer edge portion of the second base portion 21' toward the valve body (housing 1), the fourth connecting portion 23 'is tubular, and the fourth connecting portion 23' extends from an inner edge portion of the second base portion 21 'toward the second connecting pipe 4'. The housing 1 is fixedly connected with the third connecting portion 22' by welding or screw threads, and the second connecting pipe 4' is fixedly connected with the fourth connecting portion 23' by welding or screw threads. With this arrangement, the second valve seat 2' is simple in structure.

The control valve further comprises a second gasket 7', the second gasket 7' being of the same construction as the first gasket 7, the spool 6 being located between the first gasket 7 and the second gasket 7 '. The second valve seat 2 'includes a second inner step portion 24' having a step surface facing the spool 6 side, the second inner step portion 24 'being constituted by the second base portion 21' and the third connecting portion 22', the second gasket 7' being placed in the second inner step portion 24', the second valve seat 2' supporting the second gasket 7', the second gasket 7' supporting the spool 6.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the solution and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A control valve is characterized by comprising a valve body, a valve rod and a valve core, wherein the valve body comprises a valve rod hole, the valve rod penetrates through the valve rod hole, the valve core is positioned in an inner cavity of the control valve,

the valve rod comprises a main body part, a first key part and a second key part, the peripheral wall of the main body part is in clearance fit with the hole wall forming the valve rod hole, the first key part is positioned above the main body part, the second key part is positioned below the main body part, at least part of the second key part is positioned in the groove of the valve core, the valve rod can drive the valve core to rotate,

the valve body comprises a lower step part with a downward step surface, the lower step part is integrally formed on the valve body, the main body part comprises a valve rod step part with an upward step surface, the valve rod step part can be abutted against the lower step part to limit the valve rod to move upwards in the longitudinal direction,

setting a projection of the main body portion in a longitudinal direction of the valve stem as S1, a projection of the first key portion in the longitudinal direction of the valve stem as S2, and a projection of the second key portion in the longitudinal direction of the valve stem as S3, satisfies: s1 covers S2, S1 covers S3.

2. The control valve of claim 1, wherein the valve body includes a housing and a fitting, the housing being fixedly coupled to the fitting, the stem bore being disposed in the fitting, and the lower step portion being disposed in the fitting.

3. The control valve of claim 1, further comprising a sealing ring, wherein the main body portion comprises an annular groove, the sealing ring is disposed in the annular groove, and the sealing ring is elastically abutted between a groove wall of the annular groove and a hole wall of the stem hole.

4. The control valve according to claim 2, wherein the joint comprises an upper step portion with an upward facing step, the step surface of the upper step portion is annular, the step surface of the lower step portion is annular, the inner diameter of the step surface of the upper step portion is the same as the inner diameter of the step surface of the lower step portion, the outer diameter of the step surface of the upper step portion is larger than the outer diameter of the step surface of the lower step portion, and the control valve further comprises a stop ring, the stop ring is arranged on the upper step portion, and the stop ring is welded and fixed with the upper step portion.

5. The control valve of claim 4, wherein the stop ring includes a mating bore through which the first key extends, the first key being capable of abutting a bore wall of the mating bore to limit rotation of the valve stem.

6. The control valve of claim 2, wherein the housing includes a body portion and a projection, the projection projecting from a circumferential outer wall of the body portion, the body portion being cylindrical, the projection being annular, the fitting including an outer step portion having a downward facing step, the projection being in contact with a step surface of the outer step portion, a step wall of the outer step portion being located in an inner cavity of the projection, the projection being welded to the outer step portion.

7. The control valve according to any one of claims 1 to 6, further comprising a first valve seat and a first joint pipe, the first valve seat being formed by stamping a metal plate material, the first valve seat including a first base portion having a ring shape, a first connecting portion having a tubular shape extending from an outer edge portion of the first base portion toward the valve body side, and a second connecting portion having a tubular shape extending from an inner edge portion of the first base portion toward the first joint pipe side, the valve body being fixedly connected to the first connecting portion, and the first joint pipe being fixedly connected to the second connecting portion.

8. The control valve according to claim 7, wherein the first valve seat includes a first inner step portion having a step surface facing the spool side, the first inner step portion being constituted by the first base portion and the first connecting portion, the control valve further comprising a first seal gasket disposed at the first inner step portion, the first seal gasket supporting the spool.

9. The control valve according to claim 7, further comprising a second valve seat and a second nipple, the second valve seat being formed by punching a metal plate material, the second valve seat including a second base portion, a third connecting portion, and a fourth connecting portion, the second base portion being annular, the third connecting portion being tubular, the third connecting portion extending from an outer edge portion of the second base portion toward the valve body side, the fourth connecting portion being tubular, the fourth connecting portion extending from an inner edge portion of the second base portion toward the second nipple side, the valve body being welded to the third connecting portion, and the second nipple being welded to the fourth connecting portion.

10. The control valve according to claim 9, wherein the second valve seat includes a second inner step portion having a step surface facing the spool side, the second inner step portion being constituted by the second base portion and the third connecting portion, the control valve further including a second packing disposed in the second inner step portion, the second packing supporting the spool.