CN114053892A - Gas-liquid mixing device for cooling die-casting die - Google Patents
Gas-liquid mixing device for cooling die-casting die Download PDFInfo
- Publication number
- CN114053892A CN114053892A CN202010741063.8A CN202010741063A CN114053892A CN 114053892 A CN114053892 A CN 114053892A CN 202010741063 A CN202010741063 A CN 202010741063A CN 114053892 A CN114053892 A CN 114053892A
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- gas
- liquid
- nozzle
- passage
- mixing device
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- 239000007788 liquid Substances 0.000 title claims abstract description 88
- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 238000004512 die casting Methods 0.000 title claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2218—Cooling or heating equipment for dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The application relates to a gas-liquid mixing device for cooling die-casting molds. The gas-liquid mixing device includes a gas conduit and a nozzle configured to inject liquid into the gas conduit. The gas pipeline includes: a tubular wall defining a gas passage for conveying a gas; and a first engaging portion extending from the tubular wall obliquely with respect to a central axis of the gas passage. The nozzle includes: a liquid passage extending through the nozzle to supply liquid; a second engagement portion engageable with the first engagement portion such that the nozzle is inclined with respect to the gas duct; and a tapered portion extending from the second joint portion in a tapered manner and located in the gas passage.
Description
Technical Field
The invention relates to a gas-liquid mixing device for cooling a die-casting die.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The die casting machine injects molten metal under pressure into a die to cool and mold, and after the die is opened, a solid metal casting, such as a wheel hub, can be obtained. Typically, after a casting is completed, the mold is at a higher temperature, which is detrimental to the next die casting process and can affect the quality of the next casting. For this reason, the mold is usually cooled by a cooling device before the next die casting to lower the temperature of the mold to a predetermined optimum temperature.
A gas-liquid cooling device is known which is capable of supplying a two-phase mixed cooling medium of liquid or gas. However, when the gas and liquid are mixed, turbulence is easily caused, which affects the cooling effect on the mould and thus the quality of the casting.
Accordingly, it is desirable in the art to provide a gas-liquid cooling device that enables a stable mixed flow of gas and liquid.
Disclosure of Invention
An object of the present disclosure is to provide a gas-liquid cooling device for cooling a die casting mold capable of alleviating turbulence.
Another object of the present disclosure is to provide a gas-liquid cooling device capable of optimizing a mixing effect of gas and liquid.
It is a further object of the present disclosure to provide a gas-liquid cooling device that is compact.
According to one aspect of the present disclosure, a gas-liquid mixing device for cooling a die casting mold is provided. The gas-liquid mixing device includes a gas conduit and a nozzle configured to inject liquid into the gas conduit. The gas pipeline includes: a tubular wall defining a gas passage for conveying a gas; and a first engaging portion extending from the tubular wall obliquely with respect to a central axis of the gas passage. The nozzle includes: a liquid passage extending through the nozzle to supply liquid; a second engagement portion engageable with the first engagement portion such that the nozzle is inclined with respect to the gas duct; and a tapered portion extending from the second joint portion in a tapered manner and located in the gas passage.
According to the gas-liquid mixing device for cooling a die casting mold of the present disclosure, the portion of the nozzle protruding into the gas passage is a tapered portion, and thus turbulence or turbulent flow generated when the gas flows through the nozzle can be reduced. Therefore, the gas-liquid mixing device according to the present disclosure can provide a stable flow of mixed gas-liquid.
In some examples, the outlet of the liquid passage is substantially on a central axis of the gas passage.
In some examples, the tubular wall has a downstream inner surface portion downstream of the taper of the nozzle that is inclined relative to a central axis of the gas passage and extends parallel to a central axis of the liquid passage.
In some examples, the tubular wall has an inclined upstream inner surface portion upstream of the tapered portion of the nozzle, the upstream inner surface portion configured to deflect gas toward the downstream inner surface portion.
In some examples, the tubular wall has an annular projection projecting inwardly to reduce the cross-section of the gas passage, the outlet of the nozzle lying substantially in the plane of the annular projection. Optionally, the plane of the annular protrusion is perpendicular to the central axis of the liquid channel. Alternatively, the inner circumferential surface of the annular protrusion may be curved in the gas flow direction to reduce or avoid turbulence.
In some examples, the tubular wall has an annular projection projecting inwardly to reduce the cross-section of the gas passage, the outlet of the nozzle lying substantially in the plane of the annular projection. Further, the annular projection is disposed downstream of and adjacent to the upstream inner surface portion and the downstream inner surface portion.
In some examples, a central axis of the liquid passage is inclined at 30 to 55 degrees with respect to a central axis of the gas passage.
Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the invention.
Drawings
Features and advantages of one or more embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings, in which:
fig. 1 is a front view of a gas-liquid mixing device according to an embodiment of the present disclosure;
FIG. 2 is a left side view of the gas-liquid mixing device of FIG. 1;
FIG. 3 is a right side view of the gas-liquid mixing device of FIG. 1;
FIG. 4 is a top view of the gas-liquid mixing device of FIG. 1;
FIG. 5 is a bottom view of the gas-liquid mixing device of FIG. 1;
FIG. 6 is a cross-sectional view taken along line A-A of the gas-liquid mixing device of FIG. 2; and
fig. 7 is a partially enlarged schematic view of fig. 6.
Detailed Description
Exemplary embodiments will now be described more fully with reference to the accompanying drawings.
The exemplary embodiments are provided so that this disclosure will be thorough and will more fully convey the scope to those skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
A gas-liquid mixing device 1 for cooling a die casting mold according to an embodiment of the present disclosure is described below with reference to fig. 1 to 7. The gas-liquid mixing device 1 is configured to spray a mixture of gas and liquid onto a member to be cooled such as a die casting mold for cooling.
As shown, the gas-liquid mixing device 1 includes a gas pipe 10 and a nozzle 20 configured to inject liquid into the gas pipe 10. The nozzle 20 may be detachably connected to the gas pipe 10, may be fixedly connected to the gas pipe 10, or may be integrally formed with the gas pipe 10.
The gas pipe 10 is connected to a gas source for providing gas for cooling. The gas duct 10 comprises a tubular wall 110. The tubular wall 110 defines a gas passage 120 for conveying a gas (e.g., air). The gas passage 120 has a linear central axis C1.
The gas duct 10 further includes a first joint 130 for mounting or connecting the nozzle 20. The first engaging portion 130 extends outwardly from the tubular wall 110 and is inclined with respect to the central axis C1 of the gas passage 120. The first engagement portion 130 is generally cylindrical and has an internal thread 132.
The nozzle 20 is connected to a liquid source for supplying liquid for cooling into the gas duct 10. The nozzle 20 includes a second engagement portion 230. The second engagement portion 230 has external threads 232. The external threads 232 of the second coupling part 230 are coupled with the internal threads 132 of the first coupling part 130, thereby detachably coupling the nozzle 20 to the gas pipe 10. Since the first engagement portion 130 is inclined with respect to the central axis C1, the nozzle 20 is also inclined with respect to the central axis C1.
The nozzle 20 also includes a liquid passage 220 extending therethrough for supplying a liquid (e.g., water). The liquid passage 220 has a linear central axis C2. The central axis C2 is inclined with respect to the central axis C1, i.e., the angle a formed between the central axis C2 and the central axis C1 is greater than 0 degrees and less than 90 degrees. For example, the central axis C2 may be inclined 30 to 55 degrees with respect to the central axis C1. The nozzle 20 may be of linear design and the liquid channel 220 may extend linearly. Thus, the gas-liquid mixing device 1 can have a compact structure.
The central axis C2 of the liquid passage 220 may also be the central axis of the nozzle, i.e. the liquid passage 220 is located at the center of the nozzle.
The nozzle 20 also includes a tapered portion 210. The tapered portion 210 extends from the second joint portion 230 toward the inside of the gas pipe 10 in a tapered manner and terminates in the gas passage 120. The tapered portion 210 has a tapered outer side surface 211 and an end surface 213. The end surface 213 may be a curved surface to reduce turbulence or turbulence.
The tapered portion 210 protrudes into the gas passage 120. That is, the portion of the nozzle 20 projecting into the gas passage 120 (the tapered portion 210) is tapered. Since the tapered portion 210 has the tapered outer side 211, the generation of turbulence or turbulences in the gas flowing through the tapered portion 210 can be significantly reduced.
The liquid channel 220 has an outlet 221 at the end face 213 of the tapered portion 210. The liquid in the liquid channel 220 enters the gas channel 120 from the liquid channel 220 via the outlet 221. The liquid from the outlet 221 is mixed with the gas and then supplied to the die casting mold to be cooled. It is to be understood that the gas-liquid mixing device 1 of the present disclosure may also supply only one of gas and liquid as a cooling medium according to cooling needs.
The tapered portion 210 may extend to the central axis C1 of the gas passage 120. For example, the outlet 221 of the liquid passage 220 may be substantially on the central axis C1 of the gas passage 120. Thus, the liquid and the gas can be mixed well.
A step 231 may be formed between the tapered portion 210 and the second engaging portion 230 of the nozzle 20. Accordingly, a step 131 may also be formed between the tubular wall 110 of the gas pipe 10 and the first joint 130. .
A seal S may be provided between the step 231 and the step 131 to achieve sealing of the gas passage 120. It should be understood that the positioning of the nozzle 20 relative to the gas conduit 10 and the sealing of the gas passage 120 should not be limited to the specific examples illustrated.
The nozzle 20 may also have a connection 250 for connecting to a liquid source or line. The connecting portion 250 is located on the opposite side of the second engaging portion 230 from the tapered portion 210. For example, the connection 250 is threaded to a liquid line or source. The structure of the connection part 250 may vary according to the structure of the liquid source or the liquid line.
Coupling portion 250 also includes a radially outwardly extending flange 2501. The flange 2501 can abut against the end of the first joint 130, thereby achieving positioning of the nozzle 20 with respect to the gas duct 10. When the nozzle 20 is screwed to the gas duct 10 until the flange 2501 abuts the first engagement 130, the outlet 221 of the nozzle 20 is then substantially on the central axis C1 of the gas channel 120. It should be understood that the positioning structure of the nozzle 20 with respect to the gas duct 10 is not limited to the illustrated specific example.
Downstream of the tapered portion 210 of the nozzle 20, the tubular wall 110 of the gas conduit 10 may have a sloped downstream inner surface portion 112. The downstream inner surface portion 112 is inclined relative to the central axis C1 of the gas passage 120 and extends generally parallel to the central axis C2 of the liquid passage 220. In this way, the gas flowing through the tapered portion 210 flows in a direction parallel to the liquid under the guidance of the inclined downstream inner surface portion 112, whereby the mixing of the liquid and the gas can be improved.
Upstream of the tapered portion 210 of the nozzle 20, the tubular wall 110 of the gas conduit 10 may have an inclined upstream inner surface portion 114. The upstream inner surface portion 114 is configured to deflect gas toward the downstream inner surface portion 112. As such, the gas is deflected by the upstream inner surface portion 114 to the downstream inner surface portion 112 and then flows in a direction substantially parallel to the liquid. Thus, the biasing action of the upstream inner surface portion 114 may improve the mixing of the liquid and gas.
Downstream inner surface portion 112 may be located on the same side as nozzle 20 and may be opposite upstream inner surface portion 114. In other words, the upstream inner surface portion 114 may be located on a side opposite the nozzle 20.
The tubular wall 110 of the gas duct 10 may also have an annular protrusion 115 that protrudes inwardly to reduce the gas passage cross-section. The outlet 221 of the nozzle 20 is generally in the space defined by the annular protrusion 115. In other words, the outlet 221 of the nozzle 20 is substantially in the plane P in which the annular protrusion 115 lies.
Since the annular protrusion 115 reduces the gas passage cross-section, the flow rate of the gas increases while flowing through the annular protrusion 115 (i.e., the outlet 221 of the nozzle 20). A pressure drop is formed downstream of the annular protrusion 115, whereby gas backflow can be prevented.
The plane P in which the annular protrusion 115 lies may be substantially perpendicular to the central axis C2 of the liquid passage 220. The outlet 221 of the nozzle 20 may be located substantially at the center of the space defined by the annular protrusion 115. In this way, the gas around the outlet 221 of the nozzle 20 symmetrically surrounds the liquid ejected from the outlet 221. Therefore, the mixing effect of the liquid and the gas can be improved.
The inner circumferential surface 1152 of the annular protrusion 115 may be curved in the gas flow direction to reduce or avoid turbulence or turbulence. For example, the end of the inner peripheral surface 1152 in the gas flow direction may be rounded. The inner peripheral surface 1152 may be curved, involute shaped, or other suitable shape in the gas flow direction, depending on the configuration of the gas conduit and nozzle, so long as turbulence or turbulence is reduced.
An annular protrusion 115 may be disposed downstream of the upstream inner surface portion 114 and the downstream inner surface portion 112. The annular protrusion 115 may be contiguous with the upstream inner surface portion 114 and the downstream inner surface portion 112. In this way, the annular protrusion 115 may further guide the flow of the gas or change the flow direction of the gas.
Referring to fig. 7, arrows show the flow of gas. As indicated by the arrows, the annular protrusion 115 and the upstream and downstream inner surface portions 114, 112 enable the gas to be redirected, i.e. flow in a desired direction, and also to vary the flow rate of the gas to create a pressure drop and thus prevent backflow. Thereby, the flow of the mixed cooling medium of gas and liquid can be stabilized, that is, turbulence or turbulence is reduced, whereby the atomization effect of the liquid and gas can be improved, the surface of the die casting mold is cooled more uniformly, and therefore the quality of the casting molded by the subsequent die casting can be improved.
While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the specific embodiments described and illustrated in detail herein. Various modifications may be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims. It should also be understood that features of the various embodiments may be combined with each other or may be omitted without departing from the scope of the claims.
Claims (10)
1. A gas-liquid mixing device for cooling a die casting mold, wherein the gas-liquid mixing device includes a gas pipe and a nozzle configured to inject liquid into the gas pipe,
the gas pipeline includes:
a tubular wall defining a gas passage for conveying a gas; and
a first joint portion extending from the tubular wall obliquely with respect to a central axis of the gas passage,
the nozzle includes:
a liquid passage extending through the nozzle to supply liquid;
a second engagement portion engageable with the first engagement portion such that the nozzle is inclined with respect to the gas duct; and
a tapered portion extending from the second junction portion in a taper and located in the gas passage.
2. The gas-liquid mixing device according to claim 1, wherein an outlet of the liquid passage is substantially on a central axis of the gas passage.
3. The gas-liquid mixing device according to claim 1 or 2, wherein the tubular wall has a downstream inner surface portion inclined with respect to a central axis of the gas passage and extending parallel to the central axis of the liquid passage, downstream of the tapered portion of the nozzle.
4. The gas-liquid mixing device of claim 3, wherein the tubular wall has an inclined upstream inner surface portion upstream of the tapered portion of the nozzle, the upstream inner surface portion configured to deflect gas toward the downstream inner surface portion.
5. A gas-liquid mixing device according to claim 1 or 2, wherein the tubular wall has an annular projection projecting inwardly to reduce the gas passage cross-section, the outlet of the nozzle lying substantially in the plane of the annular projection.
6. The gas-liquid mixing device according to claim 5, wherein a plane in which the annular protrusion is located is perpendicular to a central axis of the liquid passage.
7. The gas-liquid mixing device according to claim 5, wherein an inner peripheral surface of the annular protrusion is curved in a gas flow direction to reduce or avoid turbulence.
8. The gas-liquid mixing device according to claim 4, wherein the tubular wall has an annular protrusion that protrudes inwardly to reduce a gas passage cross section, the outlet of the nozzle being substantially in a plane of the annular protrusion.
9. The mixer according to claim 8 wherein the annular protrusion is disposed downstream of and adjacent to the upstream and downstream inner surface portions.
10. The mixer of claim 1 or 2, wherein the central axis of the liquid passage is inclined at 30 to 55 degrees with respect to the central axis of the gas passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741063.8A CN114053892A (en) | 2020-07-28 | 2020-07-28 | Gas-liquid mixing device for cooling die-casting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010741063.8A CN114053892A (en) | 2020-07-28 | 2020-07-28 | Gas-liquid mixing device for cooling die-casting die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114053892A true CN114053892A (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010741063.8A Pending CN114053892A (en) | 2020-07-28 | 2020-07-28 | Gas-liquid mixing device for cooling die-casting die |
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