CN210461786U

CN210461786U - Control valve

Info

Publication number: CN210461786U
Application number: CN201921285718.4U
Authority: CN
Inventors: 张辉; 瞿德飞; 蒋皓; 向明朗; 王军; 李胜; 刘炼; 陶流方; 高鹏翔; 侯颖杰; 杨阳; 李贞丽
Original assignee: Mianyang Fulin Precision Machinery Co Ltd
Current assignee: Fulin Precision Co ltd; Mianyang Fulin Jinggong Co ltd; Sichuan Xinzhi Thermal Control Technology Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-05-05
Anticipated expiration: 2029-08-09

Abstract

The utility model relates to a valve structure field aims at solving the problem that the easy looks mutual friction of case and the valve casing of current control valve damages the contact surface and leads to revealing, provides a control valve, and it includes valve body, becket and case. The valve body is provided with a valve cavity and a plurality of circumferentially distributed passage ports communicated with the valve cavity; the metal ring is fixedly sleeved in the valve cavity and is provided with a plurality of side holes respectively corresponding to the channel ports; a cylindrical surface with an annular micropore gap is formed between the outer peripheral surface of the valve core and the inner peripheral surface of the metal ring in a rotating fit manner, so that the valve core can rotate relative to the metal ring; the width of the micropore gap is less than or equal to 0.1 mm; the valve core is internally provided with a flow guide channel penetrating through the peripheral surface of the valve core, and the peripheral surface of the valve core is provided with an outer cambered surface capable of sealing or partially sealing one side hole. The beneficial effects of the utility model are that friction surface wearing and tearing volume is few, and medium pressure's existence, can make the case compress tightly to the direction of this side opening to avoid the contact to reveal from this side micropore clearance.

Description

Control valve

Technical Field

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

Background

Control valves, such as three-way valves, are prone to leakage due to frictional damage to the contact surfaces of the valve spool and the valve housing when the control spool is rotated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control valve to the case and the valve casing of solving current control valve rub each other easily and damage the problem that the contact surface leads to revealing.

The embodiment of the utility model is realized like this:

a control valve includes a valve body, a metal ring, and a valve spool. The valve body is provided with a valve cavity and a plurality of circumferentially distributed passage ports communicated with the valve cavity; the metal ring is fixedly sleeved in the valve cavity and is provided with a plurality of side holes respectively corresponding to the channel ports; a cylindrical surface with an annular micropore gap is formed between the outer peripheral surface of the valve core and the inner peripheral surface of the metal ring in a rotating fit manner, so that the valve core can rotate relative to the metal ring; the width of the micropore gap is less than or equal to 0.1 mm; the valve core is internally provided with a flow guide channel penetrating through the peripheral surface of the valve core, and the peripheral surface of the valve core is provided with an outer cambered surface capable of sealing or partially sealing one side hole.

When the control valve in the scheme is used, the valve core can rotate relative to the metal ring until the flow guide channel of the valve core is correspondingly communicated with different side holes, and other side holes are sealed or partially sealed through the outer arc surface.

Due to the existence of the micropore clearance, in the rotating process of the valve core, a trace amount of medium enters between the valve core and the metal ring to form liquid friction or mixed friction, so that the friction resistance is reduced, the working environment of the friction surface is improved due to the existence of the lubricating medium, the abrasion loss can be reduced, and the service life is long. When the valve core is fixed to close a certain side hole, the valve core can be pressed towards the side hole due to the existence of medium pressure, and therefore leakage from a micropore gap on the side is avoided.

In one embodiment, the valve cartridge includes an upper wall, a lower wall, and a blocking wall connected between the upper and lower walls; the upper wall, the lower wall and the blocking wall jointly define the flow guide channel; the outer surface of the blocking wall is configured to be matched with the inner circumferential surface of the valve cavity and can block the outer arc surface of at least one side hole.

In one embodiment, the number of the channel openings is three, and the three channel openings are distributed in a T shape; the upper wall and the lower wall are both of disc-shaped structures, the plugging wall is of a cylindrical structure with a minor arc circular section, and the outer arc surface of the plugging wall is superposed with the outer peripheral surfaces of the upper wall and the lower wall; a V-shaped wall with a V-shaped section is also vertically connected between the upper wall and the lower wall; the two outer edges of the V-shaped wall respectively extend to the outer circumferences of the upper wall and the lower wall, and the intersection line of the V-shaped wall is positioned on the inner side of the outer circumferences of the upper wall and the lower wall and is spaced from the blocking wall to define a first flow passage; a through hole is formed in the V-shaped wall to communicate the first flow channel with a fan-shaped space clamped by the V-shaped wall to form a second flow channel; the first flow channel and the second flow channel are vertical and in a T shape; the included angle of the V-shaped wall is larger than the corresponding central angle of the cambered surface corresponding to the side hole on the valve cavity.

In one embodiment, the through hole of the V-shaped wall comprises a semicircular hole constituting two vertical walls of the V-shaped wall; the chord edges of the semicircular holes are overlapped and positioned at the intersection line of the two vertical walls.

In one embodiment, a central position of the lower surface of the valve core is provided with a part-spherical protrusion, and the protrusion makes point contact with the bottom surface of the valve chamber.

In one embodiment, the control valve further comprises an actuating stem rotatably engaged with the valve body; the driving rod and the valve core are integrally arranged or in transmission connection with the valve core and used for transmitting power to the valve core so as to drive the valve core to rotate.

In one embodiment, the valve body includes a valve housing having the valve chamber, and a valve cover detachably connected to the valve housing and covering the valve chamber.

In one embodiment, the control valve further comprises a driving rod, and the driving rod is sequentially provided with a transmission section, a rotation section, an oil seal section and a connection section from outside to inside; the driving rod penetrates through the valve cover and is rotatably matched with the valve cover through a rotating section of the driving rod; the transmission section extends out of the valve cavity and is used for bearing external force; the oil seal section is sleeved with an oil seal, a step hole is formed in an opening of the valve cavity, the oil seal is matched in the step hole, the valve cover is provided with a pressing ring, and the pressing ring presses the oil seal on the bottom surface of the step hole to form sealing; the connecting section is positioned in the valve cavity and is in transmission connection with the top of the valve core.

In one embodiment, a concave strip-shaped hole is formed in the top of the valve core, and the section of the connecting section of the driving rod is in a strip shape matched with the strip-shaped hole, so that the rotation of the driving rod can be transmitted to the valve core.

In one embodiment, the side hole of the metal ring has a larger diameter than the corresponding passage opening.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings referred to in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural view of a control valve in the present embodiment;

fig. 2 is a three-dimensional expanded view of the control valve in the present embodiment;

FIG. 3 is a first perspective view of the valve cartridge in this embodiment;

FIG. 4 is a second perspective view of the valve cartridge in this embodiment;

FIG. 5 is a cross-sectional view of the valve cartridge in the present embodiment;

fig. 6 is a structural view of the valve housing in the present embodiment;

fig. 7 is a structural view of the valve cover in the present embodiment;

fig. 8 is a structural view of the drive rod in the present embodiment;

FIG. 9 is a schematic view of the valve core of the present embodiment rotated to a first position;

FIG. 10 is a schematic view of the valve core of the present embodiment rotated to a second position;

fig. 11 is a schematic structural view of the valve element in the present embodiment when rotated to the third position.

Icon: 10-a control valve; 11-a valve body; 12-a metal ring; 13-a valve core; 14-a valve cavity; 15-a passage port; 16-a side hole; 17-micropore gaps; 18-a flow guide channel; 19-extrados surface; 20-upper wall; 21-lower wall; 22-plugging walls; 23-a bump; 24-a drive rod; 25-a valve housing; 26-a valve cover; 27-a screw; 28-a transmission section; 29-a turning section; 30-an oil seal section; 31-a connecting segment; 32-oil seal; 33-strip-shaped holes; 34-a V-shaped wall; 35-a first flow channel; 36-a through hole; 37-sector space; 38-a second flow channel; 39-pressure ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as a limitation of the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1 and 2, a control valve 10 in the present embodiment includes a valve body 11, a metal ring 12, and a valve element 13.

The valve body 11 is provided with a valve cavity 14 and a plurality of circumferentially distributed passage ports 15 communicated with the valve cavity 14; the metal ring 12 is fixedly sleeved in the valve cavity 14 and is provided with a plurality of side holes 16 respectively corresponding to the channel ports 15; a cylindrical surface rotation fit with an annular micropore gap 17 is formed between the outer peripheral surface of the valve core 13 and the inner peripheral surface of the metal ring 12, so that the valve core 13 can rotate relative to the metal ring 12; the width of the micropore gap 17 is less than or equal to 0.1mm, for example a gap of 0.05mm may be used.

Referring to fig. 3, 4 and 5, the valve element 13 has a flow guiding channel 18 formed therein and extending through its outer circumferential surface, and the outer circumferential surface has an outer arc surface 19 capable of closing or partially closing one of the side holes 16.

When the control valve 10 in the scheme is used, the valve core 13 can rotate relative to the metal ring 12 to enable the flow guide channel 18 to be correspondingly communicated with different side holes 16, and other side holes 16 are closed or partially closed through the outer arc surface 19.

Due to the existence of the micropore gap 17, in the rotating process of the valve core 13, a trace amount of medium enters between the valve core 13 and the metal ring 12 to form liquid friction or mixed friction, so that the friction resistance is reduced, the working environment of the friction surface is improved due to the existence of the lubricating medium, the abrasion loss can be reduced, and the service life is long. When the valve element 13 is fixed to close a certain side hole 16, the valve element 13 is pressed toward the side hole 16 due to the pressure of the medium, thereby preventing the contact from leaking from the side micropore gap 17.

Referring to fig. 3, 4 and 5 again, in this embodiment, the inner circumferential surface of the metal ring 12 may be a cylindrical surface, and the outer circumferential surface of the valve element 13 may also be a cylindrical surface. In one embodiment, the valve cartridge 13 includes an upper wall 20, a lower wall 21, and a blocking wall 22 connected between the upper wall 20 and the lower wall 21; the upper wall 20, the lower wall 21 and the blocking wall 22 together define the flow guide channel 18; the outer surface of the blocking wall 22 is configured to fit the inner circumferential surface of the valve chamber 14 and is capable of blocking the extrados surface 19 of the at least one side hole 16.

In this embodiment, the aperture of the side hole 16 of the metal ring 12 may be slightly larger than the aperture of the corresponding channel 15.

In the scheme, a part-spherical bulge 23 is arranged at the central position of the lower surface of the valve core 13, and point contact is formed between the bulge 23 and the bottom surface of the valve cavity 14 so as to reduce the contact surface and the friction resistance of the bottom surface when the valve core 13 rotates.

In the present solution, referring to fig. 1, the control valve 10 further includes a driving rod 24, and the driving rod 24 is rotatably engaged with the valve body 11; the driving rod 24 and the valve core 13 are integrally arranged or in transmission connection with the valve core 13, and are used for transmitting power to the valve core 13 to drive the valve core 13 to rotate.

In one embodiment, the valve body 11 includes a valve housing 25 having the valve chamber 14, and a valve cover 26 detachably connected to the valve housing 25 and covering the valve chamber 14. The valve housing and valve cover are configured to cooperate as shown in fig. 6 and 7. Alternatively, the valve housing 25 and the valve cover 26 may be detachably connected by screws 27. In this embodiment, the control valve 10 further includes a driving rod 24, and referring to fig. 8, the driving rod 24 includes, from outside to inside, a transmission section 28, a rotation section 29, an oil seal 32 section 30, and a connection section 31; the driving rod 24 passes through the valve cover 26 and is rotatably engaged with the valve cover 26 by a rotating section 29 thereof; the transmission section 28 extends out of the valve cavity 14 and is used for bearing external force; the oil seal 32 section 30 is sleeved with an oil seal 32, a step hole is formed in the opening of the valve cavity 14, the oil seal 32 is matched with the step hole, the valve cover 26 is provided with a pressing ring 39, and the pressing ring presses the oil seal 32 on the bottom surface of the step hole to form sealing; the connecting section 31 is positioned in the valve cavity 14 and is in transmission connection with the top of the valve core 13. Optionally, a concave strip-shaped hole 33 is formed in the top of the valve core 13, and the section of the connecting section 31 of the driving rod 24 is in a strip shape matched with the strip-shaped hole 33, so that the rotation of the driving rod 24 can be transmitted to the valve core 13. To close the gap between the drive rod 24 and the valve cover 26, an inner peripheral surface of the oil seal 32 is in sliding sealing engagement with the drive rod 24.

Referring to fig. 9, 10 and 11, in the present embodiment, there are three passage openings 15, and the three passage openings 15 are distributed in a T shape; with reference to fig. 3, 4 and 5, the upper wall 20 and the lower wall 21 are both disc-shaped structures, the plugging wall 22 is a cylindrical structure with a minor arc circular section, and the outer arc surface 19 of the plugging wall coincides with the outer peripheral surfaces of the upper wall 20 and the lower wall 21; a V-shaped wall 34 with a V-shaped section is also vertically connected between the upper wall 20 and the lower wall 21; the two outer edges of the V-shaped wall 34 extend to the outer circumferences of the upper wall 20 and the lower wall 21, respectively, the intersection line of the V-shaped wall 34 is located inside the outer circumferences of the upper wall 20 and the lower wall 21 and is spaced from the blocking wall 22 to define a first flow passage 35; the V-shaped wall 34 is provided with a through hole 36 to communicate a fan-shaped space 37 clamped by the first flow passage 35 and the V-shaped wall 34 to form a second flow passage 38; the first flow channel 35 and the second flow channel 38 are vertically T-shaped; the included angle of the V-shaped wall 34 is larger than the corresponding central angle of the arc surface corresponding to the side hole 16 on the valve cavity 14. The through hole 36 of the V-shaped wall 34 comprises a semicircular hole constituting two vertical walls of the V-shaped wall 34; the chord edges of the semicircular holes are overlapped and positioned at the intersection line of the two vertical walls.

In this way, when the spool 13 is rotated to the position shown in fig. 9, the lower side hole 16 is closed, and the first passage between the V-shaped wall 34 and the blocking wall 22 communicates with the left and right side holes 16; when the valve core 13 rotates to the position shown in fig. 10, the side hole 16 on the right side is closed, and the side hole 16 on the left side is communicated with the first channel through the second channel and then communicated with the side hole 16 below, so that a second communication mode is formed; when the spool 13 is rotated to the position shown in fig. 11, the blocking wall 22 blocks portions of the right-side hole 16 and portions of the lower-side hole 16, so that the left-side hole 16 communicates with both the right-side and lower-side holes 16.

The valve casing in this scheme can mould plastics and form, and the becket can fix in the valve casing with the inserts form when the shell is moulded plastics. Also can process both respectively and accomplish, assemble later stage again, reach both fixed as an organic whole, the passway of valve casing and the effect that the side opening of becket aligns respectively can.

As can be seen from the above description, the control valve in the present embodiment has at least one of the following advantages:

1. this scheme is through setting up a becket in the valve casing, has improved the fitting surface precision between becket and the case, can be with micropore clearance volume control within 0.1 mm.

2. The friction pair formed by the valve core and the metal ring has the wear-resisting property, and can improve the special resistance and the service life of the control valve.

3. The sealing structure or the auxiliary sealing element between various valve casings and the valve core is removed, so that the structure is simple, the number of parts is reduced, the size is small, and the assembly difficulty is reduced.

4. The flow channel formed by matching the valve shell, the metal ring and the valve core has the characteristics of large flow cross section area, short flow stroke, smooth and orderly change of the cross section and no obvious throttling position, and can effectively reduce the flow resistance of a medium. And after the medium flows through the control valve, the pressure loss is small, the energy loss is reduced, and the power consumption of the heat management system is reduced.

6. When the valve core rotates, extra friction resistance generated by various sealing structures or auxiliary sealing pieces does not need to be overcome, and the requirement for driving torque is reduced.

7. In the rotating process of the valve core, except for the dynamic friction formed by a necessary oil seal and a driving rod, the friction between the valve core and an inner annular hole of the metal ring is only additionally existed, the valve core and the metal ring are both hard high-light surfaces, the friction coefficient is low, the positive pressure is small, the friction resistance is still small, meanwhile, a trace medium enters between the valve core and the metal ring to form liquid friction or mixed friction, the friction resistance is further reduced, the working environment of the friction surface is improved due to the existence of a lubricating medium, the abrasion loss can be reduced, and the service life is long.

In other embodiments, the three passage openings may be distributed in a uniform circumferential distribution. In other embodiments, the passage opening can be provided in a plurality, so that the control valve is a four-way valve or other valves.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control valve, comprising:

the valve body is provided with a valve cavity and a plurality of circumferentially distributed passage ports communicated with the valve cavity;

the metal ring is fixedly sleeved in the valve cavity and is provided with a plurality of side holes respectively corresponding to the channel ports; and

the valve core is in cylindrical surface rotation fit with an annular micropore gap between the outer circumferential surface of the valve core and the inner circumferential surface of the metal ring, so that the valve core can rotate relative to the metal ring; the width of the micropore gap is less than or equal to 0.1 mm;

the valve core is internally provided with a flow guide channel penetrating through the peripheral surface of the valve core, and the peripheral surface of the valve core is provided with an outer cambered surface capable of sealing or partially sealing one side hole.

2. The control valve of claim 1, wherein:

the valve core comprises an upper wall, a lower wall and a blocking wall connected between the upper wall and the lower wall;

the upper wall, the lower wall and the blocking wall jointly define the flow guide channel; the outer surface of the blocking wall is configured to be matched with the inner circumferential surface of the valve cavity and can block the outer arc surface of at least one side hole.

3. The control valve of claim 2, wherein:

the number of the channel openings is three, and the three channel openings are distributed in a T shape;

the upper wall and the lower wall are both of disc-shaped structures, the plugging wall is of a cylindrical structure with a minor arc circular section, and the outer arc surface of the plugging wall is superposed with the outer peripheral surfaces of the upper wall and the lower wall;

a V-shaped wall with a V-shaped section is also vertically connected between the upper wall and the lower wall;

the two outer edges of the V-shaped wall respectively extend to the outer circumferences of the upper wall and the lower wall, and the intersection line of the V-shaped wall is positioned on the inner side of the outer circumferences of the upper wall and the lower wall and is spaced from the blocking wall to define a first flow passage;

a through hole is formed in the V-shaped wall to communicate the first flow channel with a fan-shaped space clamped by the V-shaped wall to form a second flow channel; the first flow channel and the second flow channel are vertical and in a T shape;

the included angle of the V-shaped wall is larger than the corresponding central angle of the cambered surface corresponding to the side hole on the valve cavity.

4. The control valve of claim 3, wherein:

the through hole of the V-shaped wall comprises semicircular holes of two vertical walls forming the V-shaped wall; the chord edges of the semicircular holes are overlapped and positioned at the intersection line of the two vertical walls.

5. The control valve of claim 1, wherein:

the central position of the lower surface of the valve core is provided with a part of spherical bulge, and the bulge and the bottom surface of the valve cavity form point contact.

6. The control valve of claim 1, wherein:

the control valve further comprises a driving rod which is rotatably matched with the valve body; the driving rod and the valve core are integrally arranged or in transmission connection with the valve core and used for transmitting power to the valve core so as to drive the valve core to rotate.

7. The control valve of claim 1, wherein:

the valve body includes a valve housing having the valve cavity and a valve cover detachably connected to the valve housing and covering the valve cavity.

8. The control valve of claim 7, wherein:

the control valve also comprises a driving rod, and the driving rod sequentially comprises a transmission section, a rotation section, an oil seal section and a connection section from outside to inside;

the driving rod penetrates through the valve cover and is rotatably matched with the valve cover through a rotating section of the driving rod; the transmission section extends out of the valve cavity and is used for bearing external force; the oil seal section is sleeved with an oil seal, a step hole is formed in an opening of the valve cavity, the oil seal is matched in the step hole, the valve cover is provided with a pressing ring, and the pressing ring presses the oil seal on the bottom surface of the step hole to form sealing; the connecting section is positioned in the valve cavity and is in transmission connection with the top of the valve core.

9. The control valve of claim 8, wherein:

the top of the valve core is provided with a concave strip-shaped hole, and the section of the connecting section of the driving rod is in a strip shape matched with the strip-shaped hole, so that the rotation of the driving rod can be transmitted to the valve core.

10. The control valve of claim 1, wherein:

the aperture of the side hole of the metal ring is larger than that of the corresponding channel port.