Rotational flow assembly and metering valve

Abstract

The utility model relates to the field of metering valves, and particularly discloses a rotational flow assembly which comprises a rotational flow piece and a valve seat, a receding groove and a positioning groove are formed in the rotational flow piece, and a clamping groove, a valve groove and a valve hole are formed in the valve seat. The utility model further discloses a metering valve comprising the rotational flow assembly. Wherein the spinning disk is integrally formed by adopting a die-casting process, so that the structural strength of the spinning disk can be improved, the problem of deformation of the metering disk during installation in a split design is avoided, the production efficiency is improved, and the cost is reduced; in order to guarantee the flatness of the plane, the receding groove is formed in the sprue to eliminate the height difference of redundant materials at the sprue, and the fitting degree of the surface of the spinning disk is guaranteed; and the positioning groove can play a role in positioning the workpiece when the spray hole is drilled, so that the machining precision is higher.

Description

Technical Field

[0001] This utility model belongs to the field of metering valves, and specifically relates to a swirling assembly and a metering valve. Background Technology

[0002] A swirl vane is a thin-film component installed at the nozzle of a metering valve or injector. The swirl vane has swirl grooves to improve the spray effect. Existing swirl vanes usually need to be stacked with metering vanes for assembly. The metering vanes are mainly used to open metering holes (spray holes). Since the two parts need to be processed separately and stacked for assembly, there are problems of low processing efficiency and high cost. In addition, the edges of the metering vane are easily deformed by pressure during assembly because it is too thin.

[0003] Patent documents with application numbers “CN201810650519.2” and “CN201711193762.8” both disclose a separate structural design for the swirl vane and the metering vane. The swirl vane is used to open the flow channel and swirl hole, and the metering vane is used to open the metering hole. Both documents indicate that the thickness of the metering vane is less than the thickness of the swirl vane. Although the specification in the first prior art document indicates that the swirl vane and the metering vane are manufactured as a single piece by die casting, it is difficult to die cast the two parts as a single piece in actual operation. Furthermore, it is impossible to directly make the fine metering hole structure and the thin sheet structure at the edge of the metering vane through the die casting process. In addition, the metering vane in both prior art documents also has the problem of easy deformation at the edge during assembly, as mentioned above.

[0004] The above background information is provided only to assist in understanding the utility model concept and technical solution of this utility model, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The purpose of this invention is to provide a swirl assembly and a metering valve, thereby overcoming the problems of existing separate designs of swirl vanes and metering vanes, which have high processing efficiency and low cost, and the metering vanes are prone to deformation during assembly.

[0006] To achieve the above objectives, this utility model provides a swirl assembly, including a swirl vane and a valve seat. One side of the swirl vane has several swirl grooves, and each swirl groove contains a spray hole. One end of the valve seat has a retaining groove, and the other end has a valve groove. A valve hole communicates between the retaining groove and the valve groove. One side of the swirl vane also has a clearance groove and a positioning groove. The swirl vane is detachably secured in the retaining groove, allowing one side of the swirl vane to fit against the bottom surface of the retaining groove. The swirl vane is cast, and its gate is located within the clearance groove.

[0007] Preferably, in the above technical solution, the positioning groove is located near the edge of the swirl vane.

[0008] Preferably, in the above technical solution, a boss is provided at the bottom of the slot, and the boss can be locked in the positioning groove to restrict the rotation of the swirl vane in its axial direction.

[0009] Preferably, in the above technical solution, one end of the positioning groove is provided with an arc surface, the arc surface is consistent with the contour of the boss, and the other end of the positioning groove extends outward from the edge of the swirl plate to form an insertion port.

[0010] Preferably, in the above technical solution, the side wall of the slot is provided with a protruding ring, which can be locked onto the outer periphery of the swirl vane.

[0011] Preferably, in the above technical solution, a first conical surface is provided at one end of the convex ring near the bottom surface of the slot, and a first rounded corner is provided at the edge of the other side of the swirl plate. The first conical surface contacts the first rounded corner and can drive the swirl plate to adhere tightly to the bottom surface of the slot.

[0012] Preferably, in the above technical solution, a second rounded corner is provided on the edge of one side of the swirl vane.

[0013] Preferably, in the above technical solution, the edge of the end face of the other end of the valve seat is provided with a guide surface.

[0014] Preferably, in the above technical solution, a plurality of guide grooves are provided on the outer periphery of the valve groove.

[0015] To achieve the above objectives, the present invention also provides a metering valve, which includes the swirling assembly as described above, and a valve body. One end of the valve body is provided with a nozzle, and the valve seat is inserted into the opening of the nozzle in a tight fit manner. A valve ball is provided in the valve groove, and a push rod is provided in the nozzle. A second conical surface is provided at the bottom of the valve groove, and the end of the push rod can push the valve ball into the second conical surface.

[0016] Compared with existing technologies, this utility model has the following beneficial effects:

[0017] 1. The swirl vanes in the swirl assembly of this utility model are integrally formed by die casting, which can increase the structural strength of the swirl vanes, avoid the problem of deformation during the installation of the metering vanes in the split design, and improve production efficiency and reduce costs. In order to ensure the flatness of the plane, a relief groove is set at the gate to eliminate the height difference of excess material at the gate, ensuring the fit of the swirl vane surface. The positioning groove can play the role of positioning the workpiece when drilling the spray hole, so as to improve the machining accuracy.

[0018] 2. The swirl groove and the guide groove of the swirl vane form an eccentric structure, which will generate a torsional torque in the radial direction during spraying. After long-term use, this will cause the swirl vane to rotate and shift. Therefore, a boss is provided at the bottom of the slot to lock into the limiting groove and thus restrict the axial rotation of the swirl vane.

[0019] 3. A flow guide groove is provided on the outer periphery of the valve seat groove. The flow guide groove allows the liquid to pass more easily through the area between the valve seat groove and the valve ball, so as to ensure the normal operation of the metering valve. Attached Figure Description

[0020] Figure 1 This is a partial cross-sectional view of the swirl assembly in this utility model.

[0021] Figure 2 This is a structural diagram of a swirl vane.

[0022] Figure 3 This is a structural diagram of the valve seat.

[0023] Figure 4 This is a structural diagram of the valve seat from another perspective.

[0024] Figure 5 This is a partial sectional view of the metering valve in this utility model.

[0025] Explanation of key figure labels:

[0026] 100 - Swirl vane, 110 - First fillet radius, 120 - Second fillet radius;

[0027] 200-valve seat, 210-slot, 211-convex ring, 212-first conical surface, 220-valve groove, 221-second conical surface, 230-valve hole, 240-guide surface, 250-flow guide groove;

[0028] 300-Swirl channel, 310-Spray hole, 320-Drawer channel, 330-Main flow channel, 340-Leaning groove, 350-Positioning groove, 351-Arc surface, 352-Insert;

[0029] 400 - Boss;

[0030] 500-Valve body, 510-Nozzle, 520-Valve ball, 530-Push rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0035] like Figures 1 to 5 As shown, the swirling assembly in this embodiment includes: a swirling vane 100, a first rounded corner 110, a second rounded corner 120, a valve seat 200, a slot 210, a convex ring 211, a first conical surface 212, a valve groove 220, a second conical surface 221, a valve hole 230, a guide surface 240, a guide groove 250, a swirling groove 300, a spray hole 310, a flow channel 320, a main flow channel 330, a clearance groove 340, a positioning groove 350, an arc surface 351, and a socket 352.

[0036] The swirl vane 100 is manufactured by die casting. One side of the swirl vane 100 has a swirl groove 300, a clearance groove 340, and a positioning groove 350. There are two or more swirl grooves 300, evenly distributed around the center of the swirl vane 100. A spray hole 310 is provided within each swirl groove 300, and the gate of the swirl vane 100 is located within the clearance groove 340. One end of the valve seat 200 has a retaining groove 210, and the other end has a valve groove 220. A valve hole 230 connects the retaining groove 210 and the valve groove 220. The side wall of the 0 is provided with a protruding ring 211. A first conical surface 212 is provided at one end of the protruding ring 211 near the bottom surface of the slot 210. A first rounded corner 110 is provided on the edge of the other side of the swirling vane 100. The first conical surface 212 contacts the first rounded corner 110 and can push the swirling vane 100 towards the bottom surface of the slot 210 so that the two are in close contact. A second rounded corner 120 is provided on the edge of one side of the swirling vane 100. The second rounded corner 120 is used to make way for the rounded cutting surface of the tool tip angle generated when machining the slot 210 to prevent interference.

[0037] More specifically, the positioning groove 350 is located near the edge of the swirl vane 100, and one end of the positioning groove 350 near the center of the swirl vane 100 is provided with an arc surface 351, and the other end of the positioning groove 350 extends outward from the edge of the swirl vane 100 to form an insertion port 352.

[0038] More specifically, the edge of the end face of the other end of the valve seat 200 is provided with a tapered guide surface 240, which can play a guiding role, thereby facilitating the installation of the valve seat 200 into the nozzle 510. Three guide grooves 250 are provided on the outer periphery of the valve groove 220, and each guide groove 250 is evenly distributed around the center of the valve groove 220.

[0039] In addition, this embodiment also discloses a metering valve, which includes the above-mentioned swirling assembly. In addition, the metering valve also includes a valve body 500. One end of the valve body 500 is equipped with a nozzle 510. The valve seat 200 can be inserted into the opening of the nozzle 510 in a tight fit manner. A valve ball 520 is provided in the valve groove 220. A push rod 530 is sleeved in the nozzle 510. A second conical surface 221 is provided at the bottom of the valve groove 220. The end of the push rod 530 can push the valve ball 520 into the second conical surface 221, so that the spherical surface of the valve ball 520 and the second conical surface 221 form a sealing structure.

[0040] Additionally, a circular protrusion 400 is provided at the bottom of the slot 210. The protrusion 400 can be locked in the positioning groove 350, and the diameter of the protrusion 400 is consistent with the width of the positioning groove 350 to restrict the rotation of the swirl vane 100 in its axial direction. When installing the swirl vane 100, the edge of the insertion port 352 can be inserted into the protrusion 400 first, and then the edge of the other side of the swirl vane 100 can be pressed to make the swirl vane 100 snap into the slot 210. When the swirl vane 100 is snapped in, the protrusion 400 can slide along the positioning groove 350 until it is close to the position of the arc surface 351.

[0041] Next, the processing principle of a cyclone assembly and metering pump in this embodiment will be described in detail to enable those skilled in the art to better understand this utility model:

[0042] The swirl vane 100 is integrally formed by die casting, and the gate of the casting mold is located in the relief groove 340. After casting, it is positioned on the tooling by the positioning groove 350, so that the positioning pin on the tooling is stuck at the arc surface 351. The nozzle 310 is machined by drilling. Then, the swirl vane 100 is installed in the slot 210 of the valve seat 200 by press fitting. Finally, the valve seat 200 with the swirl vane 100 installed is installed at the port of the nozzle 510. The pressure of the nozzle 510 pipe wall can press the outer periphery of the valve seat 200 and further tighten the side wall of the slot 210. Since the convex ring 211 has a first conical surface 212 structure, it can generate an axial component force of the swirl vane 100, which can press the swirl vane 100 against the bottom of the slot 210.

[0043] In summary, the swirl vane 100 in the swirl assembly of this embodiment is integrally formed by die casting, which increases the structural strength of the swirl vane 100, avoids the deformation problem during installation of the metering vane in the split design, and improves production efficiency and reduces costs. In order to ensure the flatness of the plane, a relief groove 340 is set at the gate to eliminate the height difference of excess material at the gate, ensuring the fit of the swirl vane 100 surface. The positioning groove 350 can play the role of positioning the workpiece when drilling the spray hole 310, so as to improve the machining accuracy.

[0044] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A swirl assembly, comprising a swirl vane and a valve seat, wherein a plurality of swirl grooves are formed on one side of the swirl vane, and spray holes are provided in the swirl grooves; a retaining groove is formed at one end of the valve seat, and a valve groove is formed at the other end of the valve seat; a valve hole communicates between the retaining groove and the valve groove, characterized in that: One side of the swirl vane is also provided with a clearance groove and a positioning groove. The swirl vane is detachably locked in the slot and can make one side of the swirl vane fit against the bottom surface of the slot. The swirl vane is cast and the gate is located in the clearance groove.

2. The swirl assembly according to claim 1, characterized in that, The positioning groove is located near the edge of the swirl vane.

3. The swirl assembly according to claim 2, characterized in that, A boss is provided at the bottom of the slot, which can be engaged in the positioning groove to restrict the rotation of the swirl vane in its axial direction.

4. The swirl assembly according to claim 3, characterized in that, One end of the positioning groove is provided with an arc surface, which is consistent with the outline of the boss, and the other end of the positioning groove extends outward from the edge of the swirl plate to form an insertion port.

5. The swirl assembly according to claim 1, characterized in that, The side wall of the slot is provided with a protruding ring, which can be locked onto the outer periphery of the swirl vane.

6. The swirl assembly according to claim 5, characterized in that, A first conical surface is provided at one end of the convex ring near the bottom surface of the slot, and a first rounded corner is provided at the edge of the other side of the swirl vane. The first conical surface contacts the first rounded corner and can drive the swirl vane to adhere tightly to the bottom surface of the slot.

7. The swirl assembly according to claim 1, characterized in that, A second rounded corner is provided on one edge of the swirl vane.

8. The swirl assembly according to claim 1, characterized in that, The other end face of the valve seat has a guide surface on its edge.

9. The swirl assembly according to claim 1, characterized in that, Several guide grooves are provided on the outer periphery of the valve groove.

10. A metering valve comprising the swirling assembly according to any one of claims 1 to 9, characterized in that, It also includes a valve body, one end of which is provided with a nozzle. The valve seat is inserted into the opening of the nozzle in a tight fit manner. A valve ball is provided in the valve groove. A push rod is provided in the nozzle. A second conical surface is provided at the bottom of the valve groove. The end of the push rod can push the valve ball into the second conical surface.

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