CN218895006U

CN218895006U - Control valve

Info

Publication number: CN218895006U
Application number: CN202221564221.8U
Authority: CN
Inventors: 请求不公布姓名
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: 2023-04-21
Anticipated expiration: 2032-06-21

Abstract

The utility model discloses a control valve, which comprises a shell, a first valve seat and a first connecting piece, wherein a first base part of the first valve seat comprises a first outer step part, and positioning is realized by contacting a step surface of the first outer step part with one end surface of the shell. The positioning structure of the shell and the first valve seat is increased relative to the background technology, and the shell and the first valve seat are conveniently positioned during assembly.

Description

Control valve

Technical Field

The utility model relates to the technical field of fluid control, in particular to a control valve.

Background

Fig. 1 is a schematic structural view of a ball valve in the background art. As shown in fig. 1, the ball valve comprises a valve body 01, a valve head 02, a valve seat 03, a valve rod 05 and a valve ball 06, wherein the valve body 01 is fixedly welded with the valve head 02, the valve body 01 is fixedly welded with the valve seat 03, the valve rod 05 penetrates through the valve head 02, and the valve rod 05 is rotated to enable the valve ball 06 to rotate, so that the opening and closing of the ball valve are realized. In this structure, no positioning structure is provided between the valve body 01 and the valve seat 03, and a positioning jig is required to position the valve body 01 and the valve seat 03 during assembly.

Disclosure of Invention

The utility model provides an object provides a control valve, including casing, first disk seat and first connecting piece, first disk seat includes first basal portion, first connecting portion and second connecting portion, first basal portion is cyclic annular, first connecting portion is tubulose, first connecting portion is from the outer fringe portion of first basal portion towards the casing side extends, second connecting portion is tubulose, second connecting portion is from the inner edge portion of first basal portion towards first connecting piece side extends, first connecting portion includes the step face orientation the first outer step portion of casing side, the step face of first outer step portion with one end face contact of casing, the casing with first connecting portion fixed connection, first connecting piece with second connecting portion fixed connection.

The control valve comprises a shell, a first valve seat and a first connecting piece, wherein a first base part of the first valve seat comprises a first outer step part, and the step surface of the first outer step part is in contact with one end surface of the shell to realize positioning. The positioning structure of the shell and the first valve seat is increased relative to the background technology, and the shell and the first valve seat are conveniently positioned during assembly.

Drawings

Fig. 1: a partial structure schematic diagram of a ball valve in the background art;

fig. 2: the utility model provides a cross-section schematic diagram of a control valve;

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

fig. 4: FIG. 2 is a schematic partial cross-sectional view of a first valve seat;

fig. 5: an enlarged schematic view at I in fig. 4;

fig. 6: fig. 2 is a schematic partial cross-sectional view of a second valve seat.

In fig. 2 to 6:

1-a shell and an inner cavity of a 10-control valve;

11-body portion, 110-lumen of body portion;

12-bulge, 120-inner cavity of bulge;

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

22-first connection, 23-second connection, 231-relief;

24-first outer step, 241-step face of the first outer step;

242-a step wall of the first outer step;

243-groove part, 244-guide part, 2441-guide surface of guide part;

25-inner step parts, 251-convex ribs;

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

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

24 '-second outer step portion, 241' -second outer step portion step surface;

242' -a step wall of the second outer step portion;

3-valve head, 30-through hole;

31-a stop portion, 32-an external threaded portion;

4-first connector, 41-first mating segment;

4 '-second connector, 41' -second mating segment;

5-valve rod, 51-upper step part;

6-valve core;

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

8-valve cap, 81-internal thread.

Detailed Description

In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

It should be noted that, the terms upper and lower are defined in fig. 2 by the positions of the components in the drawing and the positions of the components with respect to each other, and are only used for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms herein should not be construed to limit the scope of the application as claimed.

FIG. 2 is a schematic cross-sectional view of a control valve according to the present utility model; FIG. 3 is an enlarged schematic view of the portion K in FIG. 2; FIG. 4 is a schematic partial cross-sectional view of the first valve seat of FIG. 2; fig. 5 is an enlarged schematic view at I in fig. 4.

As shown, the control valve includes a housing 1, a first valve seat 2, a valve head 3, a first connector 4, a valve stem 5, a valve core 6, a first gasket 7, and a bonnet 8. Specifically, the blank of the first valve seat 2 is made 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 housing 1 side, the second connecting portion 23 is tubular, and the second connecting portion 23 extends from an inner edge portion of the first base 21 toward the first connecting member 4 side, that is, the first connecting portion 22 and the second connecting portion 23 are located on different sides of the first base 21. In this embodiment, the first connecting member 4 is specifically a connection tube, and may be a flange or the like. Further, the first connecting portion 22 and the second connecting portion 23 are coaxially disposed, that is, the central axis of the first connecting portion 22 coincides with the central axis of the second connecting portion 23, and the inner diameter dimension of the first connecting portion 22 is larger than the outer diameter dimension of the second connecting portion 23.

The first connecting portion 22 includes a first outer step portion 24 having a step surface facing the side of the housing 1, the first outer step portion 24 being formed by turning a blank of the first valve seat 2, a step surface 241 of the first outer step portion 24 being in contact with an end surface of the housing 1 to achieve axial positioning, a step wall 242 of the first outer step portion 24 being in clearance fit with an inner wall of the housing 1 to achieve radial positioning, a clearance here preferably being a bilateral clearance of 0.2mm or less. In this way, the positioning assembly of the housing 1 and the first valve seat 2 is facilitated. The housing 1 is fixedly connected with the first valve seat 2 by welding or threads, and the first connecting piece 4 is fixedly connected with the second connecting portion 23 by welding or threads.

In this embodiment, the first valve seat 2 includes the first connecting portion 22 and the second connecting portion 23, the first connecting portion 22 is provided with the first outer step portion 24 having a step surface facing the side where the housing 1 is located, the step surface 241 of the first outer step portion 24 is positioned in contact with one end surface of the housing 1, and the step wall 242 of the first outer step portion 24 is positioned in clearance fit with the inner wall of the housing 1. Compared with the background art, the positioning structure of the housing 1 and the first valve seat 2 is added, a positioning clamp is not needed, and positioning assembly of the housing 1 and the first valve seat 2 is facilitated.

Further, the first outer step portion 24 includes a groove portion 243 and a guide portion 244, and a groove wall of the groove portion 243 extends outward in the radial direction of the first valve seat 2 to form a step surface 241 of the first outer step portion 24. The guide portion 244 is distant from the first base portion 21 with respect to the groove portion 243, and the outer diameter of the guide surface 2441 of the guide portion 244 becomes smaller in a direction away from the groove portion 243. The groove 243 in this embodiment is used as a clearance angle, and ensures that one end surface of the housing 1 is reliably in contact with the step surface 241 of the first outer step 24, thereby improving the positioning accuracy between the first valve seat 2 and the housing 1. The guide surface 2441 in this embodiment facilitates the assembly of the first valve seat 2 with the housing 1.

The shell 1 is formed by stamping and stretching stainless steel pipes, and comprises a body part 11 and a protruding part 12, wherein the protruding part 12 protrudes from the circumferential outer wall of the body part 11, the body part 11 is cylindrical, the protruding part 12 is annular, the step wall 241 of the first outer step part 24 is positioned in the inner cavity 110 of the body part, the body part 11 is fixedly welded with the first connecting part 22, the valve head 3 part is positioned in the inner cavity 120 of the protruding part, and the protruding part 12 is fixedly welded with the valve head 3.

In this embodiment, the valve head 3 is substantially annular and is formed by turning a stainless steel profile. The valve head 3 comprises a through hole 30, the valve rod 5 penetrates through the through hole 30, the valve core 6 is arranged in an inner cavity 10 of the control valve, the valve rod 5 is connected with a key groove of the valve core 6, and the valve rod 5 can drive the valve core 6 to rotate so as to open and close the control valve or adjust the flow of the control valve. The first valve seat 2 has an inner stepped portion 25 with a stepped surface facing the direction of the valve body 6, the inner stepped portion 25 is formed by a first base portion 21 and a first connecting portion 22, the first gasket 7 is placed on the inner stepped portion 25, the first gasket 7 supports the valve body 6, the inner stepped portion 25 includes a bead 251 protruding toward the direction of the valve body 6, the bead 251 is formed by turning from a blank of the first valve seat 2, that is, the bead 251 is integrally formed on the first base portion 21, and the bead 251 abuts against the first gasket 7. By the arrangement, the sealing performance of the control valve during closing is improved.

As a further solution, the valve head 3 comprises an integrally formed stop 31, the valve stem 5 comprising an upper step 51 with a step facing upwards, the upper step 51 being able to abut against the stop 31 to limit the upward movement of the valve stem 5 in the longitudinal direction of the control valve. In the scheme, the valve rod 5 is of a flip-chip structure, and the stop part 31 formed integrally is reliable in limiting the valve rod 5; and, the backstop portion sets up on valve head 3, and valve rod 5 need not to set up the flange portion of outwards protrusion and can realize reliable spacing, can reduce the material cost of valve rod 5.

The lower section of the valve head 3 is welded and fixed with the bulge 12, the outer wall of the upper section of the valve head 3 is provided with an external thread part 32, the inner wall of the valve cap 8 is provided with an internal thread part 81, and the external thread part 32 is screwed and fixed with the internal thread part 81.

Further, the first connecting piece 4 includes a first mating section 41, the first mating section 41 is sleeved on the second connecting portion 23, and the first mating section 41 contacts the first base 21, so that positioning assembly of the first connecting piece 4 and the first valve seat 2 is facilitated. The second connection portion 23 includes a relief portion 231, and the relief portion 231 is formed by a drawing process. The first fitting section 41 is fixedly welded after being in socket-joint fit with the convex pattern portion 231. By providing the ridge portion 231, the melted solder is facilitated to flow between the first fitting section 41 and the second connecting portion 23 through the ridge portion 231, and the welding reliability of the first connecting member 4 and the first valve seat 2 is improved.

The casing 1, the first valve seat 2 and the first connecting piece 4 are made of stainless steel materials, in the scheme, the first valve seat 2 and the first connecting piece 4 are firstly welded and fixed into a component through a furnace, and then the first valve seat 2 and the casing 1 are fixed through laser welding.

Fig. 6 is a schematic partial cross-sectional view of the second valve seat of fig. 2.

As shown in fig. 2 and 6, the control valve further comprises a second valve seat 2', a second connecting member 4' and a second gasket 7'. The second valve seat 2' is identical in structure to the first valve seat 2 and is disposed 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 housing 1 side, the fourth connecting portion 23 'is tubular, the fourth connecting portion 23' extends from an inner edge portion of the second base portion 21 'toward the second connecting member 4' side, the third connecting portion 22 'includes a second outer step portion 24' having a step surface toward the housing 1 side, a step surface 241 'of the second outer step portion contacts the other end surface of the housing 1, and a step wall 242' of the second outer step portion is positioned in clearance fit with an inner wall of the housing 1, where the clearance is preferably a bilateral clearance of 0.2mm or less. The housing 1 is fixedly connected with the third connecting portion 22' by welding or threads, and the second connecting member 4' is fixedly connected with the fourth connecting portion 23' by welding or threads. So set up, the positioning assembly of casing 1 and second disk seat 2' is convenient for. In the present embodiment, the second connecting member 4' is specifically a connection tube, and may be a flange or the like.

The second connecting piece 4 'comprises a second matching section 41', the second matching section 41 'is sleeved on the fourth connecting part 23', the second matching section 41 'is contacted with the second base part 21', and the second matching section 41 'is welded and fixed with the fourth connecting part 23'. So set up, the locating assembly of second connecting piece 4 'and second disk seat 2' is convenient.

The second gasket 7' is identical in structure to the first gasket 7 and is disposed symmetrically with respect to the central axis of the projection 12. The valve spool 6 is located between the first gasket 7 and the second gasket 7', the second valve seat 2' supports the second gasket 7', and the second gasket 7' supports the valve spool 6.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the inventive arrangements and their core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. The utility model provides a control valve, its characterized in that includes casing, first disk seat and first connecting piece, first disk seat includes first basal portion, first connecting portion and second connecting portion, first basal portion is cyclic annular, first connecting portion is tubulose, first connecting portion from the outer fringe portion of first basal portion towards the casing side extends, second connecting portion is tubulose, second connecting portion from the inner edge portion of first basal portion towards first connecting piece side extends, first connecting portion includes the step face towards the first outer step portion of casing side, the step face of first outer step portion with one end face contact of casing, the casing with first connecting portion fixed connection, first connecting piece with second connecting portion fixed connection.

2. The control valve of claim 1, wherein the first connection is coaxially disposed with the second connection, and wherein an inner diameter dimension of the first connection is greater than an outer diameter dimension of the second connection.

3. The control valve according to claim 1, wherein the first outer step portion includes a groove portion and a guide portion, a groove wall of the groove portion extending outward in a radial direction of the first valve seat to form a step surface of the first outer step portion, the guide portion being distant from the first base portion with respect to the groove portion, an outer diameter of a guide surface of the guide portion being tapered in a direction away from the groove portion.

4. The control valve according to claim 1, wherein the housing includes a body portion and a protruding portion protruding from a circumferential outer wall of the body portion, the body portion is cylindrical, the protruding portion is annular, the body portion is welded to the first connecting portion, a step wall of the first outer step portion is in clearance fit with an inner wall of the housing, the control valve further includes a valve head portion located in an inner cavity of the protruding portion, and the protruding portion is welded to the valve head portion.

5. The control valve of claim 4, further comprising a valve spool disposed in the interior chamber of the control valve, and a first gasket, the first valve seat having an inner land portion with a land facing the valve spool side, the inner land portion being formed by the first base portion and the first connecting portion, the first gasket disposed in the inner land portion, the inner land portion including a bead protruding toward the valve spool side, the bead abutting the first gasket, the first gasket supporting the valve spool.

6. The control valve of claim 5, further comprising a valve stem, the valve head including a through bore, the valve stem being disposed through the through bore, the valve stem being connected to the spool keyway, the valve head including an integrally formed stop, the valve stem including an upper stepped portion with a stepped surface facing upward, the upper stepped portion being capable of abutting the stop to limit upward movement of the valve stem in a longitudinal direction of the control valve.

7. The control valve according to any one of claims 4 to 6, wherein the lower section of the valve head is welded to the projection, an outer wall of the upper section of the valve head is provided with an external screw portion, the control valve further comprises a valve cap, an inner wall of the valve cap is provided with an internal screw portion, and the external screw portion is screwed to the internal screw portion.

8. The control valve of any of claims 1-6, wherein the first connector includes a first mating segment that is sleeved over the second connector, the first mating segment being in contact with the first base, the second connector including a relief portion, the first mating segment being welded to the relief portion.

9. The control valve of any one of claims 1-6, wherein the housing, the first valve seat, and the first connector are made of stainless steel material, the first valve seat and the first connector are secured by in-furnace welding, and the housing and the first valve seat are secured by laser welding.

10. The control valve according to claim 1, further comprising a second valve seat and a second connecting member, 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 housing 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 connecting member side, the third connecting portion including a second outer step portion having a step surface facing the housing side, the step surface of the second outer step portion being in contact with the other end surface of the housing, the step wall of the second outer step portion being in clearance fit with an inner wall of the housing, the housing being fixedly connected to the third connecting portion;

the second connecting piece comprises a second matching section, the second matching section is sleeved outside the fourth connecting portion, the second matching section is in contact with the second base portion, and the second matching section is welded and fixed with the fourth connecting portion.