CHAMPAGNE TOWER-TYPE MULTI-STAGE THROTTLE CONTROL VALVE

Abstract

A champagne tower-type multi-stage throttle control valve includes a valve body, a valve cover, a throttle sleeve, and a valve core. A sleeve cavity of the throttle sleeve is shaped as a stepped hole with two or more layers. The valve core is shaped as a stepped shaft with two or more layers coaxial with the throttle sleeve. The number of shaft shoulders of the valve core is smaller than or equal to the number of hole shoulders of the sleeve cavity of the throttle sleeve, such that each set of shaft shoulders of the valve core in an axial direction can form a sealing surface fit with corresponding hole shoulders of the throttle sleeve. A flow channel groove is axially or obliquely formed on each of the hole shoulders of the throttle sleeve and/or the shaft shoulders of the valve core.

Claims

1. A champagne tower-type multi-stage throttle control valve, comprising a valve body and a valve cover covering the valve body, wherein the valve cover and an inner cavity of the valve body together enclose a valve cavity for arranging a throttle sleeve and a valve core; a fluid inlet and a fluid outlet penetrate through the valve cavity, wherein the fluid inlet and the fluid outlet communicate with an external environment; the valve core is inserted into a sleeve cavity of the throttle sleeve, such that, after a medium enters through the fluid inlet, the medium flows to the fluid outlet through a fluid passage formed between the throttle sleeve and the valve core; the sleeve cavity of the throttle sleeve is shaped as a stepped hole with two or more layers; the valve core is shaped as a stepped shaft with two or more layers, wherein the stepped shaft is coaxial with the throttle sleeve; a number of shaft shoulders of the valve core is smaller than or equal to a number of hole shoulders of the sleeve cavity of the throttle sleeve, such that each set of shaft shoulders of the valve core in an axial direction forms a sealing surface fit with corresponding hole shoulders of the throttle sleeve; a flow channel groove is axially or obliquely formed on each of the hole shoulders of the throttle sleeve and/or the shaft shoulders of the valve core, and a flow channel groove on the hole shoulder and a flow channel groove on the shaft shoulder are spaced away from each other; and when the valve core produces an axial displacement action relative to the throttle sleeve until a sealing surface is exposed, the sealing surface formed by the hole shoulders of the throttle sleeve and the shaft shoulders of the valve core communicates with the flow channel grooves to form the fluid passage, wherein the hole shoulders of the throttle sleeve and the shaft shoulders of the valve core match each other.

2. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein from an inlet end of the fluid passage to an outlet end of the fluid passage, a total throttle area of a flow channel groove on a stepped shaft section of each layer of the valve core increases stage by stage; and flow channel grooves on a stepped shaft section of a same layer are axially and evenly distributed around an axis of the valve core, and flow channel grooves on stepped shaft sections of adjacent layers are evenly staggered from each other.

3. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein a length of a flow channel groove on a stepped shaft section of each layer of the valve core is smaller than an axial length of the stepped shaft section of the each layer, such that the flow channel groove is shaped as a straight key groove with a tail end closed.

4. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein a length of a flow channel groove on a stepped shaft section of each layer of the valve core is smaller than an axial length of the stepped shaft section of the each layer, such that the flow channel groove is shaped as an oblique groove, wherein a tail end of the oblique groove is closed and a groove length direction of the oblique groove forms an included angle with an axial direction of the valve core; and inclination directions of flow channel grooves on stepped shaft sections of two adjacent layers are opposite to each other.

5. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein a length of a flow channel groove on a stepped shaft section of each layer of the valve core is equal to an axial length of the stepped shaft section of the each layer, such that the flow channel groove is shaped as a straight through-groove.

6. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein a length of a flow channel groove on a stepped shaft section of each layer of the valve core is equal to an axial length of the stepped shaft section of the each layer, such that the flow channel groove is shaped as an oblique through-groove of which a groove length direction forms an included angle with an axial direction of the valve core; and inclination directions of flow channel grooves on stepped shaft sections of two adjacent layers are opposite to each other.

7. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein an outer wall of the throttle sleeve has a conical surface structure with a cross-sectional area increased from top to bottom; a valve seat is provided at a top end of the throttle sleeve, and a bottom end surface of the valve seat forms a sealing fit with a top end surface of the throttle sleeve; a valve stem vertically penetrates through the valve cover, then enters into a stepped hole cavity of the throttle sleeve through a coaxial hole at the valve seat, and forms a coaxial fixed fit with the valve core; a fluid hole radially penetrates through the valve seat; the fluid inlet is located at a side of the valve body, and the fluid outlet is located at a bottom end of the valve body; and a medium enters the fluid passage through the fluid hole.

8. The champagne tower-type multi-stage throttle control valve according to claim 7, wherein a top end surface of the valve core is sealed against the bottom end surface of the valve seat to form a top end sealing pair; and a throttle area formed at the top end sealing pair is larger than a throttle area at a first-stage shaft shoulder of the valve core.

9. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein an inner cavity of the valve core is shaped as a horn-type counterbore with an opening facing downwards.

10. The champagne tower-type multi-stage throttle control valve according to claim 1, wherein the fluid outlet has a bell mouth-shaped structure with a gradually-increasing hole size.

11. The champagne tower-type multi-stage throttle control valve according to claim 2, wherein an outer wall of the throttle sleeve has a conical surface structure with a cross-sectional area increased from top to bottom; a valve seat is provided at a top end of the throttle sleeve, and a bottom end surface of the valve seat forms a sealing fit with a top end surface of the throttle sleeve; a valve stem vertically penetrates through the valve cover, then enters into a stepped hole cavity of the throttle sleeve through a coaxial hole at the valve seat, and forms a coaxial fixed fit with the valve core; a fluid hole radially penetrates through the valve seat; the fluid inlet is located at a side of the valve body, and the fluid outlet is located at a bottom end of the valve body; and a medium enters the fluid passage through the fluid hole.

12. The champagne tower-type multi-stage throttle control valve according to claim 3, wherein an outer wall of the throttle sleeve has a conical surface structure with a cross-sectional area increased from top to bottom; a valve seat is provided at a top end of the throttle sleeve, and a bottom end surface of the valve seat forms a sealing fit with a top end surface of the throttle sleeve; a valve stem vertically penetrates through the valve cover, then enters into a stepped hole cavity of the throttle sleeve through a coaxial hole at the valve seat, and forms a coaxial fixed fit with the valve core; a fluid hole radially penetrates through the valve seat; the fluid inlet is located at a side of the valve body, and the fluid outlet is located at a bottom end of the valve body; and a medium enters the fluid passage through the fluid hole.

13. The champagne tower-type multi-stage throttle control valve according to claim 4, wherein an outer wall of the throttle sleeve has a conical surface structure with a cross-sectional area increased from top to bottom; a valve seat is provided at a top end of the throttle sleeve, and a bottom end surface of the valve seat forms a sealing fit with a top end surface of the throttle sleeve; a valve stem vertically penetrates through the valve cover, then enters into a stepped hole cavity of the throttle sleeve through a coaxial hole at the valve seat, and forms a coaxial fixed fit with the valve core; a fluid hole radially penetrates through the valve seat; the fluid inlet is located at a side of the valve body, and the fluid outlet is located at a bottom end of the valve body; and a medium enters the fluid passage through the fluid hole.

14. The champagne tower-type multi-stage throttle control valve according to claim 5, wherein an outer wall of the throttle sleeve has a conical surface structure with a cross-sectional area increased from top to bottom; a valve seat is provided at a top end of the throttle sleeve, and a bottom end surface of the valve seat forms a sealing fit with a top end surface of the throttle sleeve; a valve stem vertically penetrates through the valve cover, then enters into a stepped hole cavity of the throttle sleeve through a coaxial hole at the valve seat, and forms a coaxial fixed fit with the valve core; a fluid hole radially penetrates through the valve seat; the fluid inlet is located at a side of the valve body, and the fluid outlet is located at a bottom end of the valve body; and a medium enters the fluid passage through the fluid hole.

15. The champagne tower-type multi-stage throttle control valve according to claim 6, wherein an outer wall of the throttle sleeve has a conical surface structure with a cross-sectional area increased from top to bottom; a valve seat is provided at a top end of the throttle sleeve, and a bottom end surface of the valve seat forms a sealing fit with a top end surface of the throttle sleeve; a valve stem vertically penetrates through the valve cover, then enters into a stepped hole cavity of the throttle sleeve through a coaxial hole at the valve seat, and forms a coaxial fixed fit with the valve core; a fluid hole radially penetrates through the valve seat; the fluid inlet is located at a side of the valve body, and the fluid outlet is located at a bottom end of the valve body; and a medium enters the fluid passage through the fluid hole.

16. The champagne tower-type multi-stage throttle control valve according to claim 2, wherein an inner cavity of the valve core is shaped as a horn-type counterbore with an opening facing downwards.

17. The champagne tower-type multi-stage throttle control valve according to claim 3, wherein an inner cavity of the valve core is shaped as a horn-type counterbore with an opening facing downwards.

18. The champagne tower-type multi-stage throttle control valve according to claim 4, wherein an inner cavity of the valve core is shaped as a horn-type counterbore with an opening facing downwards.

19. The champagne tower-type multi-stage throttle control valve according to claim 5, wherein an inner cavity of the valve core is shaped as a horn-type counterbore with an opening facing downwards.

20. The champagne tower-type multi-stage throttle control valve according to claim 6, wherein an inner cavity of the valve core is shaped as a horn-type counterbore with an opening facing downwards.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a schematic cross-sectional view of the present invention in a closed state;

[0025] FIG. 2 is a schematic cross-sectional view of the present invention in an opened state;

[0026] FIG. 3 is a schematic stereoscopic view of the present invention in which the flow channel groove of the valve core is a straight key groove with a tail end closed;

[0027] FIG. 4 is a front view of the structure shown in FIG. 3;

[0028] FIG. 5 is a cross-sectional view of the structure shown in FIG. 4;

[0029] FIG. 6 is a schematic stereoscopic view of the present invention in which the flow channel groove of the valve core is an oblique groove with a tail end closed; and

[0030] FIG. 7 is a front view of the structure shown in FIG. 6.

REFERENCE NUMERALS

[0031] a represents a flow channel groove and b represents a top end sealing pair; [0032] 10 represents a valve body, 11 represents a fluid inlet, and 12 represents a fluid outlet; [0033] 20 represents a valve cover; [0034] 30 represents a throttle sleeve and 31 represents a hole shoulder; [0035] 40 represents a valve core and 41 represents a shaft shoulder; [0036] 50 represents a valve seat and 51 represents a fluid hole; and [0037] 60 represents a valve stem.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] For ease of understanding, the specific structure and working mode of the present invention are further described below:

[0039] A specific implementation structure of the present invention can be seen in FIG. 1 to FIG. 7, and a main structure of the present invention includes a valve body 10, a valve cover 20, a valve core 40, a throttle sleeve 30, a valve seat 50, a valve stem 60, and the like. The valve body 10 in this embodiment is an angle-type structure, in which a fluid inlet 11 penetrates through a side, a fluid outlet 12 penetrates through a bottom, and the fluid outlet 12 is provided with a diameter-expanding section or the fluid outlet 12 itself forms a diameter-expanding structure, as shown in FIG. 1 to FIG. 2.

[0040] As shown in FIG. 1 to FIG. 7, the valve core 40 and the throttle sleeve 30 both are stepped, and match with each other in shaft diameter, hole diameter, and length. In other words, in the structure shown in FIG. 1 and FIG. 2, the valve core 40 is shaped as a multi-layer stepped shaft, and a sleeve cavity of the throttle sleeve 30 is shaped as a stepped hole with a corresponding number of layers matching the valve core 40, such that the two form the coaxial sleeve-connected sealing fit shown in the figures. It can be seen from FIG. 3 to FIG. 7, a plurality of flow channel grooves a are formed on a cylindrical stepped surface of a layer of the valve core 40, that is, the flow channel groove a starts from a shaft shoulder 41 of the stepped surface of the layer, extends axially or obliquely in a flow direction of a medium, and finally forms a through-groove or a groove structure with a single end closed. Of course, for the flow channel groove a, the groove structures in FIG. 3 to FIG. 7 may not be adopted, but another groove shape can be adopted. A cross section of the groove body may be rectangular, triangular, trapezoidal, gear teeth-shaped, or the like, as long as the guiding capability of the fluid passage under the stepped structure can be realized.

[0041] Of course, the valve core 40 can also be hollow, which can reduce a weight of the valve core 40. If necessary, a lower guiding section can be provided on the valve core 40 to cooperate with a lower guiding sleeve or the valve body 10, and a noise reduction structure can be provided on the lower guiding section to improve the practicability of the overall structure.

[0042] When a flow channel groove a is formed, it should be noted that a total throttle area of the flow channel groove a on each layer increases layer by layer in a flow direction of a medium. In other words, when each layer have a same number of flow channel grooves a with a same groove length, the flow channel grooves a on the next layer definitely have a larger axial cross-sectional area than that on the previous layer; and when different layers have different numbers of flow channel grooves a with a same specification, a number of flow channel grooves a on the next layer is definitely larger than that on the previous layer. The flow channel grooves a on each layer are evenly distributed around an axis of the valve core 40, and the flow channel grooves a on two adjacent layers should be staggered evenly to achieve the even diversion or confluence of a medium.

[0043] In actual manufacturing, the valve core 40 and the valve stem 60 may be in an integrated design or a separated design, and the valve seat 50 and the throttle sleeve 30 may also be in an integrated design or a separated design. For the top end sealing pair b formed by the valve seat 50 and the valve core 40, when the valve is opened, a throttle area formed at the top end sealing pair b is larger than a throttle area at a stepped shaft section of a first layer, such that a maximum flow rate of a medium after throttling occurs downstream of the top end sealing pair b, thereby effectively extending a life of the top end sealing pair b. In addition, a sealing surface range of the valve core 40 should cover a sealing surface range of the valve seat 50, that is, an outer diameter of a sealing surface of the valve core 40 is larger than an outer diameter of a sealing surface of the valve seat 50, an inner diameter of the sealing surface of the valve core is smaller than an inner diameter of the sealing surface of the valve seat 50, and a hardness of the sealing surface of the valve core 40 is greater than a hardness of the sealing surface of the valve seat 50.

[0044] In order to facilitate the understanding of the present invention, the adoption of the straight key groove with a tail end closed shown in FIG. 3 to FIG. 5 for the valve core 40 is taken as an example, and a specific use process of the present invention is further described below with reference to FIG. 1 and FIG. 2.

[0045] As shown in FIG. 1, the present invention is in a closed state as a whole.

[0046] The present invention is opened as shown in FIG. 2, that is, the valve stem 60 is driven to move downwards. Since the valve stem 60 is fixedly connected to the valve core 40, the valve stem 60 will drive the valve core 40 to move downwards, such that the top end sealing pair b formed by the valve core 40 and the valve seat 50 is opened, and the shaft shoulders 41 of the valve core 40 also gradually move away from the hole shoulders 31 of the throttle sleeve 30. As shown in FIG. 3 to FIG. 5, a tail end of the flow channel groove a is of a small distance from the shaft shoulders 41 of the lower layer, that is, when the top end sealing pair b is disengaged, a flow channel groove a on each step of the valve core 40 does not completely move out of a sleeve cavity fitting surface formed by the sleeve cavity of the throttle sleeve 30, that is, the sleeve cavity of the throttle sleeve 30 still forms a sealing fit with a peripheral wall of the valve core 40 in a circumferential direction. Thus, the valve stem 60 needs to further move downwards until the flow channel groove a on the valve core 40 gradually moves out of the sleeve cavity fitting surface of the throttle sleeve 30, such that the fluid passage is enabled as shown in FIG. 2.

[0047] When the present invention is opened, as shown by a flow direction arrow in FIG. 2, a high-pressure-difference medium enters from a side inlet (namely, the fluid inlet 11) of the valve body 10, then flows through the fluid hole 51 at the valve seat 50, flows through the fluid passage formed by the valve core 40 and the throttle sleeve 30, then flows to the diameter-expanding section (namely, the fluid outlet 12) of the valve body 10, and finally flows out of the valve body 10.

[0048] Finally, it should be noted that the above implementations are merely used to explain the technical solutions of the present invention, and are not intended to limit the same. Although the present invention is described in detail with reference to the preferred examples, those of ordinary skill in the art should understand that various modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention. For example, a shape of the flow channel groove a can be simply changed without changing an inherent function, or shapes of the outer wall of the throttle sleeve 30 and the outer wall of the valve body 10 can be simply changed, and even arrangement positions of the fluid inlet 11 and the fluid outlet 12 can be simply changed without affecting a function. Such conventional technical extensions on the basis of the above-mentioned structures should be covered by the claimed scope of the present invention.