CN210461787U

CN210461787U - Control valve

Info

Publication number: CN210461787U
Application number: CN201921295851.8U
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 of revealing after the bad or wearing and tearing of prior art's valve member leakproofness, provides a control valve, and it includes valve body, centering shaft, case and elastic component. The valve body is provided with a valve cavity and a plurality of passage ports which are communicated with the valve cavity and are distributed circumferentially; the centering shaft is axially arranged in the middle of the valve cavity; the valve core comprises a core column and blades fixedly connected to the side surface of the core column; the outer surface of the blade is arranged into an outer cambered surface matched with the channel opening; the core column is provided with a centering hole along the axial direction and can be sleeved on the centering shaft in a rotating way through the centering hole; the section of the centering hole is larger than that of the centering shaft, so that a radial gap exists between the centering hole and the centering shaft; the elastic member is disposed in the radial gap and elastically supported between the centering shaft and the valve core. The beneficial effects of the utility model are that the leakproofness is good and can compensate contact wear.

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 installed between the circulation circuits as means for controlling the flow direction or flow rate of the medium.

The existing control valve has some defects, such as poor sealing performance, for example, leakage caused by abrasion of a valve core.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control valve to solve the smooth and easy problem of the unable leakproofness of compromise of prior art's valve member and case motion.

The embodiment of the utility model is realized like this:

a control valve includes a valve body, a centering shaft, a valve core, and an elastic member. The valve body is provided with a valve cavity and a plurality of passage ports which are communicated with the valve cavity and are distributed circumferentially; the centering shaft is axially arranged in the middle of the valve cavity; the valve core comprises a core column and blades fixedly connected to the side surface of the core column; the outer surface of the blade is arranged into an outer cambered surface matched with the channel opening; the core column is provided with a centering hole along the axial direction and can be sleeved on the centering shaft in a rotating way through the centering hole; the section of the centering hole is larger than that of the centering shaft, so that a radial gap exists between the centering hole and the centering shaft; the elastic member is disposed in the radial gap and elastically supported between the centering shaft and the valve core.

When the control valve in the scheme is used, the valve core is driven to rotate to a required position (such as a position for completely closing a certain channel opening or partially closing a certain or certain channel openings) through external force, so that the functions of switching a flow channel and/or controlling flow and the like are realized.

Based on the structural arrangement of the control valve in the scheme, the elastic piece elastically applies an elastic force outwards along the radial direction to the valve core, so that the contact sealing property between the valve core and the valve cavity can be further improved, and even if the blade or the valve cavity is abraded, the blade can move forwards and compensate towards the inner wall direction of the valve cavity, namely, the blade can still be tightly attached to the inner wall direction of the valve cavity, and good sealing is formed. In addition, due to the existence of the radial clearance, when medium hydraulic pressure exists in the valve cavity, the medium pressure can further press the blade on the inner wall of the valve cavity, and the contact sealing performance is further improved.

From this, the control valve in this scheme has that the leakproofness is good and can compensate contact wear's beneficial effect.

In one embodiment: the centering hole is a long hole with a semi-cylindrical surface, and the radial length of the centering hole is larger than the diameter of the centering shaft, so that when one side of the centering shaft is tightly attached to one side of the semi-cylindrical surface of the centering hole, a radial gap exists between the other side of the centering shaft and the other side of the centering hole.

In one embodiment:

the blades are of arc-shaped sheet structures, and the core column is of a columnar structure; the inner cambered surfaces of the blades and the outer peripheral surface of the core column are mutually spaced and connected together through a transverse rib plate perpendicular to the axial direction of the core column.

In one embodiment:

the maximum outer diameter of the outer cambered surface of the blade is larger than the inner diameter of the valve cavity.

In one embodiment:

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

In one embodiment:

the control valve also comprises a driving rod which is rotatably matched with the valve cover; the lower end of the driving rod penetrates through the valve cover to enter the valve cavity and is in transmission connection with the valve core.

In one embodiment:

the elastic piece is an elastic reed which is a bent strip-shaped sheet structure; the two ends of the elastic spring leaf are bent to the same side, and the middle of the elastic spring leaf is bent to the other side in an arc shape, so that elastic potential energy is stored between the two sides.

In one embodiment:

the control valve also comprises a driving rod, the driving rod is rotatably matched with the top wall and the bottom wall of the valve cavity along the axis of the valve cavity, and the lower part of the driving rod is used as a centering shaft of a centering hole penetrating through the valve core; the upper end of the driving rod is positioned outside the valve body and is used for connecting an external structure.

In one embodiment:

the centering shaft is a cylindrical rod piece, and the centering shaft is fixed on the bottom wall of the valve cavity through the lower end of the centering shaft.

In one embodiment:

the three passage openings are distributed in a T shape or uniformly and circumferentially distributed at intervals of 120 degrees.

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 diagram of a control valve according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural diagram of a control valve according to a second embodiment of the present invention;

fig. 4 is a three-dimensional expanded view of a control valve according to a second embodiment of the present invention;

fig. 5 is a three-dimensional view of a valve housing according to a second embodiment of the present invention;

fig. 6 is a three-dimensional view of a valve cover according to a second embodiment of the present invention;

fig. 7 is a three-dimensional view of an oil seal according to a second embodiment of the present invention;

fig. 8 is a three-dimensional view of a valve cartridge according to a second embodiment of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8;

fig. 10 is a three-dimensional view of the elastic member according to the second embodiment of the present invention;

FIG. 11 is a view of the valve cartridge fully closing one of the passage ports;

FIG. 12 is a view of the valve spool fully closing the other port;

fig. 13 is a view of the spool portion closing off two passage ports.

Icon: 10-a control valve; 11-a valve body; 12-a centering shaft; 13-a valve core; 14-an elastic member; 15-valve cavity; 16-a passage port; 17-a stem; 18-a blade; 19-extrados surface; 20-centering the hole; 21-radial clearance; 22-a drive rod; 23-a valve housing; 24-a valve cover; 25-a screw; 26-oil seal; 27-a convex ring; 28-pipe strap; 29-transverse rib plate; 30-vertical rib plate; 31-oblate hole; 32-inner end; 10 a-control valve.

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.

Example one

Referring to fig. 1 and 2 in combination, the present embodiment provides a control valve 10 including a valve body 11, a centering shaft 12, a valve core 13, and an elastic member 14.

The valve body 11 has a valve cavity 15 and a plurality of circumferentially distributed passage openings 16 communicating with the valve cavity 15. The centering shaft 12 is axially disposed in the middle of the valve chamber 15, and the valve core 13 includes a stem 17 and a vane 18 fixedly connected to a side surface of the stem 17. The outer surface of the vane 18 is arranged to fit the outer arc surface 19 of the passage opening 16. The stem 17 is provided with a centering hole 20 along the axial direction, and is rotatably sleeved on the centering shaft 12 through the centering hole 20. The cross section of the centering hole 20 is larger than the centering shaft 12 so that a radial gap 21 exists between the centering hole 20 and the centering shaft 12. The elastic member 14 is disposed in the radial gap 21 and elastically supported between the centering shaft 12 and the valve core 13.

In order to apply a force for rotating the valve element 13, a driving rod 22 penetrating through the valve body 11 and connected to the valve element 13 is further provided in the present embodiment, so that the valve element 13 can be driven conveniently. Of course, the drive rod 22 could alternatively be provided in other arrangements, such as extending the upper portion of the valve cartridge 13 upwardly out of the valve body 11 and rotationally engaging the valve body 11; an external driving structure can also be adopted to extend into the valve cavity 15 to connect the valve core 13.

When the control valve 10 in the scheme is used, the valve core 13 is driven to rotate to a required position (for example, a position for completely closing a certain passage port 16 or partially closing a certain or certain passage ports 16) through an external force, so that functions of switching a flow passage and/or controlling flow and the like are realized.

Based on the structural arrangement of the control valve 10 in the present embodiment, the elastic member 14 elastically applies an elastic force radially outward to the valve element 13, so that the contact sealing performance between the valve element 13 and the valve cavity 15 can be further improved, and even after the vane 18 or the valve cavity 15 is worn, the vane 18 can move forward and compensate toward the inner wall of the valve cavity 15, i.e., the vane 18 can still be tightly attached to the inner wall of the valve cavity 15, so as to form a good seal. In addition, due to the existence of the radial clearance 21, when the medium pressure exists in the valve cavity 15, the medium pressure can further press the blade 18 on the inner wall of the valve cavity 15, and the contact sealing performance is further improved.

Therefore, the control valve 10 in the scheme has the advantages of good sealing performance and capability of compensating contact wear.

Example two

Referring to fig. 3 and 4, the control valve 10a in the present embodiment is further designed based on the first embodiment. The further design of which will be described below. Of course, the structure is further designed to achieve some additional effects, and is not a necessary structure of the present invention.

Referring to fig. 3 and 4, in the present embodiment, the circumferential surface of the valve cavity 15 is a ring surface (which may be a cylindrical surface, a spherical surface, or another surface) formed by rotating around an axis, and the centering shaft 12 is axially disposed in the middle of the valve cavity 15, and can be fixedly connected to the valve body 11, or can be rotatably connected to the valve body 11 by using its own center shaft as a rotation axis, so that it can rotate around its own axis. In general, the centering shaft 12 functions as a base shaft for rotating the valve element 13, and only needs to be provided with a mechanism for allowing the valve element 13 to rotate about the base shaft. Thus, the centering shaft 12 may be directly fixed to the valve body 11 or may be indirectly connected to the valve body 11. For example, the centering shaft 12 may be injection molded to install the embedded valve body 11, and the embedded section may be knurled, grooved, etc. to increase the bonding strength.

In the present embodiment, the valve body 11 includes a valve housing 23 having the valve chamber 15, and a valve cover 24 detachably connected to the valve housing 23 and covering the valve chamber 15. The valve housing 23 and the valve cover 24 may be configured to be removably coupled together by screws 25. In this embodiment, the valve body 11 is further provided with a valve housing 23 and a valve cover 24 which are detachably connected to each other, so that the internal structure can be easily disassembled, replaced, and the like. In this embodiment, the passage port 16 is provided in the valve housing 23 to communicate with the valve chamber 15. Referring collectively to fig. 5 and 6, to avoid leakage at the junction of the valve housing 23 and the valve cover 24, an oil seal 26 may be provided therebetween. The outer periphery of the oil seal 26 is provided with a bellows section which is interference fitted in the stepped hole. Specifically, a stepped hole may be formed at the opening of the valve cavity 15 of the valve housing 23, an oil seal 26 (the structure of the oil seal 26 can be seen in fig. 7) is disposed on the stepped surface, a downward convex ring 27 is disposed on the lower surface of the valve cover 24, and the convex ring 27 of the valve cover 24 presses down the oil seal 26 to mount and seal the oil seal 26 under the condition that the valve cover 24 is connected to the valve housing 23. The manner in which the oil seal 26 is disposed. Or the manner in which the seal is achieved may be selected as desired. Numerous other structures may be provided on the valve cover 24 and/or the valve housing 23, such as a tube clamp 28 provided on the valve cover 24 to facilitate positioning of the tubing attached to the control valve 10 a.

In this embodiment, the three passage ports 16 are distributed in a shape of three, so that the control valve 10a in this embodiment is used as a three-way valve.

In other embodiments, the ports 16 may be arranged in a uniform circumferential distribution, such as 120 ° or other subdivision; even other numbers of the passage ports 16 may be provided, and the control valve 10a may be changed from a three-port three-way valve to, for example, a four-way valve, a one-way valve, or the like.

In the present embodiment, referring to fig. 8 and 9, the centering hole 20 is a long hole having a semi-cylindrical surface, and the radial length of the centering hole 20 is greater than the diameter of the centering shaft 12, so that when one side of the centering shaft 12 is closely attached to one side of the semi-cylindrical surface of the centering hole 20, a radial gap 21 exists between the other side of the centering shaft 12 and the other side of the centering hole 20. In this embodiment, the centering shaft 12 is a cylindrical rod, and the centering shaft 12 is fixed on the bottom wall of the valve cavity 15 through the lower end thereof. Alternatively, the centering hole 20 is provided as a flat square hole, i.e., a hole formed by combining a semi-cylindrical hole and a rectangular hole. Based on the shape of the centering hole 20, the rotating fit between the centering hole 20 and the centering shaft 12 can be well maintained on the basis of reserving the radial gap 21 for accommodating the elastic member 14. In other embodiments, the centering hole 20 may be provided in other shapes, such as a waist hole or even a rectangular hole, as long as the rotation of the centering shaft 12 is ensured to receive the elastic member 14. Alternatively, the vanes 18 are of an arc-shaped sheet structure, and the stem 17 is of a columnar structure; the outer curved surface 19 of the vane 18 fits the annular surface of the valve chamber 15 so that the two can fit closely to seal the interface. And the extrados surface 19 is larger than the passage opening 16 so that it can completely cover a certain passage opening 16. In this embodiment, the intrados of the vanes 18 and the outer peripheral surface of the stem 17 are spaced from each other and connected together by a transverse rib 29 extending in a direction perpendicular to the axial direction of the stem 17. Alternatively, the cross rib plate 29 is located at the axial middle position of the core column 17, and is reinforced and connected by an upper vertical rib plate 30 and a lower vertical rib plate 30 which are connected between the outer peripheral surface of the core column 17, the inner cambered surface of the blade 18 and the cross rib plate 29. In this arrangement, the liquid in the valve chamber 15 will fill between the intrados of the vanes 18 and the stem 17 to apply a hydraulic force radially outwardly against the vanes 18 to further ensure the sealing of the vanes 18. In this embodiment, optionally, the maximum outer diameter of the outer arc surface 19 of the vane 18 is larger than the inner diameter of the valve chamber 15. To further ensure complete coverage of a certain port 16, and to perform the function of closing that port 16.

As already described in the first embodiment, in the present embodiment, referring to fig. 3, the control valve 10a further includes a driving rod 22, the driving rod 22 being rotatably engaged with the valve cover 24; the lower end of the driving rod 22 passes through the valve cover 24 to enter the valve cavity 15 and is connected with the valve core 13 in a driving mode. The portion of the driving rod 22 exposed outside the valve cap 24 may be toothed or the like to receive an external force to rotate the valve element 13. The inner end 32 of the driving rod 22 can be provided with an oblate section, meanwhile, the oblate hole 31 is arranged at the top of the core column 17 of the valve core 13, and the rotation of the driving rod 22 can be transmitted to the valve core 13 through the matching of the oblate sections of the inner end 32 of the driving rod 22 and the top of the core column 17 of the valve core 13, so that the blade 18 can be driven to rotate to a required position. The oblong aperture 31 may be in communication with the centering hole 20.

Referring to fig. 3, in the embodiment provided with drive rod 22, the inner ring of oil seal 26 also needs to form a dynamic seal with the circumferential surface of drive rod 22. The inner periphery of the oil seal 26 is provided with a seal lip, which may be a double lip, an O-ring, a star-ring, or the like.

In other embodiments, the inner end 32 of the driving rod 22 may extend toward the bottom of the valve chamber 15, such that the driving rod 22 is rotatably coupled to the top and bottom walls of the valve chamber 15 along the axis of the valve chamber 15, such that the lower portion of the driving rod 22 can be used as the centering shaft 12 passing through the centering hole 20 of the valve core 13, and thus, no additional rod member is required to serve as the centering shaft 12. Of course, to ensure radial displacement of the spool 13, the drive connection of the drive rod 22 and the spool 13 has a radial clearance, and specifically, the cross-section of the drive rod 22 may be made slightly smaller than the flat circular hole 31 at the top of the stem 17.

In the present embodiment, referring to fig. 10, the elastic member 14 is an elastic spring, and the elastic spring is a bent strip-shaped sheet structure; the two ends of the elastic spring leaf are bent to the same side, and the middle of the elastic spring leaf is bent to the other side in an arc shape, so that elastic potential energy is stored between the two sides. The resilient member 14 may be placed in a compressed state after insertion into the radial gap 21 to provide a resilient force.

In other embodiments, the elastic member 14 may be an elastic rubber block or the like, which can only accommodate the radial gap 21 and provide the elastic force.

Referring to fig. 11, 12 and 13, in the control valve 10a of the present embodiment, when in use, the external power controls the rotation and stop positions of the core of the valve 10a through the driving rod 22 and the like.

When the vanes 18 of the valve element 13 are stopped in the position shown in fig. 11 or 12, one of the passage openings 16 is completely closed, and the other two passage openings 16 are connected, so that one can be used as an inlet and the other as an outlet for throughflow;

when the vanes 18 of the valve element 13 are stopped in the position shown in fig. 13, one of the passage openings 16 is fully open, and the other two passage openings 16 are partially closed, so that two passages can be kept through at the same time, and the flow rates of the two flow passages can be controlled by controlling the different stop angles of the vanes 18.

Combining the above two embodiments, it can be seen that the present solution has at least one of the following advantages:

1. the outer cambered surface 19 of the blade 18 is matched with the valve cavity 15 to form sealing, and auxiliary parts of different types are eliminated, so that the structure is simple, the number of parts is small, the size is small, the assembly difficulty is low, and the cost is low.

2. Because the elastic part 14 is arranged between the valve core 13 and the centering shaft 12, the elastic part 14 is pre-compressed after being installed and can continuously expand the blades 18 to apply thrust, so that the outer cambered surfaces 19 of the blades 18 are always tightly attached to the valve cavity 15; and even if the vane 18 or the inner wall of the valve cavity 15 has slight abrasion, the vane 18 can move forwards to compensate and still keep close fit to form good sealing.

3. When the pressure of the medium exists in the valve cavity 15, the medium pressure also presses the vanes 18 against the side wall of the valve cavity 15, so that a good seal is formed.

4. The vanes 18 rotate without overcoming the additional frictional resistance created by various types of auxiliary seals, or multiple sets of auxiliary seals, reducing the drive torque requirements.

5. The vanes 18 can be made of wear-resistant and medium-resistant materials with low friction coefficient and high forming precision, and generate smaller friction force when in friction motion with the inner wall of the valve cavity 15, so that the driving torque requirement is reduced.

6. In the rotating process of the blade 18, the binding face of the outer arc surface 19 and the side wall of the inner hole of the shell is continuously changed, medium lubrication is continuously existed on the surface, dry friction is avoided, the friction resistance can be effectively reduced, and abrasion is reduced.

7. The structure has strong impurity resistance. Because the cambered surface 19 of the blade 18 is continuously attached to the side wall of the inner hole of the shell, impurities are difficult to adhere to the inner surface of the attaching surface, and even if the impurities enter accidentally, the elastic piece 14 is compressed, and the blade 18 moves backwards to give way. And when the vanes 18 are rotated to the position corresponding to the passage port 16, the foreign substances are dropped and discharged.

8. The internal parts such as the blades 18, the elastic part 14, the driving rod 22 and the like have small volumes, and a flow passage formed by matching with the valve body 11 has the characteristics of large flow cross section area, short flow stroke, smooth and ordered section change and no obvious throttling position, and can effectively reduce the flow resistance of a medium.

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 centering shaft is arranged in the middle of the valve cavity along the axial direction;

the valve core comprises a core column and blades fixedly connected to the side surface of the core column; the outer surface of the blade is arranged to be matched with the outer cambered surface of the channel opening; the core column is provided with a centering hole along the axial direction and can be sleeved on the centering shaft in a rotating way through the centering hole; the section of the centering hole is larger than that of the centering shaft, so that a radial gap exists between the centering hole and the centering shaft; and

and an elastic member disposed in the radial gap and elastically supported between the centering shaft and the valve core.

2. The control valve of claim 1, wherein:

the centering hole is a long hole with a semi-cylindrical surface, and the radial length of the centering hole is larger than the diameter of the centering shaft, so that when one side of the centering shaft is tightly attached to one side of the semi-cylindrical surface of the centering hole, the radial gap exists between the other side of the centering shaft and the other side of the centering hole.

3. The control valve of claim 1, wherein:

4. The control valve of claim 1, wherein:

the maximum outer diameter of the outer arc surface of the blade is larger than the inner diameter of the valve cavity.

5. 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.

6. The control valve of claim 5, wherein:

the control valve further comprises a driving rod which is rotatably matched with the valve cover;

the lower end of the driving rod penetrates through the valve cover to enter the valve cavity and is in transmission connection with the valve core.

7. The control valve of claim 1, wherein:

8. The control valve of claim 1, wherein:

the control valve also comprises a driving rod, the driving rod is rotatably matched with the top wall and the bottom wall of the valve cavity along the axis of the valve cavity, and the lower part of the driving rod is used as the centering shaft of the centering hole penetrating through the valve core;

the upper end of the driving rod is positioned outside the valve body and is used for connecting an external structure.

9. The control valve of claim 1, wherein:

the centering shaft is a cylindrical rod piece, and the lower end of the centering shaft is fixed on the bottom wall of the valve cavity.

10. The control valve of claim 1, wherein:

the number of the channel openings is three, and the three channel openings are distributed in a T shape or are uniformly distributed in a circumferential manner at intervals of 120 degrees.