Multi-component mixing apparatus and method
By using a nozzle in the mixing device to inject the second product as a flat jet, the problems of complexity and unevenness of existing mixing devices are solved, resulting in better mixing effect and cleanliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- EXEL INDUSTRIES
- Filing Date
- 2021-08-26
- Publication Date
- 2026-08-04
AI Technical Summary
Existing mixing devices are complex and difficult to clean, resulting in uneven mixing, especially when mixing the base material and the catalyst, due to unevenness caused by catalyst dripping.
The second product is injected into the mixing chamber as a flat jet using a nozzle with an injection angle between 50° and 80°. The nozzle is located in the second supply device and has a higher pressure than the first product. The nozzle is aligned with the flow axis of the mixing chamber, which has an air inlet to promote turbulence.
It achieves better mixing uniformity and contact surface, promotes uniform mixing of the first and second products at the mixing chamber outlet, simplifies the device structure, and improves cleanliness.
Smart Images
Figure CN114100400B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a multi-component mixing apparatus, which includes at least a first supply device for a first product and a second supply device for a second product. The mixing apparatus has a mixing chamber having at least a first inlet and a second inlet. The first supply device enters the mixing chamber at the first inlet, and the second supply device enters the mixing chamber at the second inlet.
[0002] The present invention also relates to a related mixing method. Background Technology
[0003] This mixing device is used, for example, to mix a base material with a catalyst shortly before coating to form a coating product.
[0004] A specific mixing device exists, comprising a mixing chamber having a catalyst inlet and a product base inlet. The product base is fed into the mixing chamber in a flowing manner, while the catalyst is injected in a dripping manner.
[0005] However, the catalyst subsequently forms droplets in the base stream.
[0006] One possible approach is to provide mixing components, such as propellers or static mixers.
[0007] However, this makes the device more complex and therefore more difficult to maintain, especially cleaning it.
[0008] In addition, propellers or static mixers may have preferential flow channels, resulting in uneven mixing at the outlet.
[0009] Therefore, one object of the present invention is to improve the mixing device to achieve better mixing. Summary of the Invention
[0010] Therefore, one object of the present invention is to provide a mixing device of the type described above, wherein the mixing device includes a nozzle arranged and adapted to inject a second product from a second supply device as a flat jet into a mixing chamber, advantageously with an injection angle between 50° and 80°.
[0011] The second product is injected as a flat jet into the mixing chamber, and the first product is introduced into it, resulting in better distribution of the second product within the first product and improved contact surface between the two products. The first and second products are uniformly mixed at the outlet of the mixing chamber.
[0012] The device may also have one or more of the following features, considered individually or in any technically possible combination:
[0013] The nozzle is arranged in the second supply device, and the nozzle includes a downstream end arranged near the second inlet, more specifically, the distance is strictly less than 5.0 mm, preferably 3.0 mm, more preferably 2.0 mm; the nozzle is arranged in the second supply device, and the distance between the first inlet and the downstream end in the direction of the flow axis is less than or equal to 10.0 mm.
[0014] Adjust the second supply so that the pressure on the second product is strictly higher than that on the first product, more specifically at least 1.0% higher;
[0015] The nozzle defines at least one channel, each of which includes an injection port, the injection from upstream to downstream including a circular channel portion directly following the slot, the circular channel portion and the slot intersecting to form an ellipse;
[0016] The mixing chamber has a flow axis, and the nozzles are arranged to inject a second product around a central injection axis, which is aligned with the flow axis.
[0017] The mixing chamber has a flow axis, and the first supply device is adapted to introduce the first product into the mixing chamber along the central supply axis, the angle between the central supply axis and the flow axis being between 0° and 135°, more specifically, between 0° and 90°;
[0018] The mixing chamber has a flow axis, and a first supply device is adapted to introduce a first product into the mixing chamber along the central supply axis. The central supply axis and the flow axis each define their own straight lines and have a minimum distance from each other, referred to as the offset between the central supply axis and the flow axis. This offset is not zero, and more specifically, it lies between 3% of the mixing chamber radius and the mixing chamber radius value; and / or
[0019] The mixing device includes an air supply device, and the mixing chamber has an air inlet, through which the air supply device enters the mixing chamber.
[0020] The present invention also relates to a method for mixing at least a first product and a second product, comprising the following steps:
[0021] Provide the mixing device as described above.
[0022] The first product is supplied at the first entrance.
[0023] Supplying the second product to the second entry point, and
[0024] The second product is injected into the first product in the mixing chamber through a flat nozzle that advantageously has an injection angle between 50° and 80°. Attached Figure Description
[0025] Further features and advantages of the present invention will become apparent from the following description of embodiments of the invention, which are given by way of example only and with reference to the accompanying drawings, wherein:
[0026] Figure 1 This is a front view showing a cross-section of the device according to an embodiment of the present invention along the first section II;
[0027] Figure 2 This is a side view showing the device along... Figure 4 The cross section cut by the second section II-II in the middle;
[0028] Figure 3 This is a perspective view showing a portion of the device along... Figure 4 The section cut by the second section II-II;
[0029] Figure 4 This is a top view showing the device along... Figure 1 The section cut by the third section IV-IV;
[0030] Figure 5 for Figure 1 Front view of the nozzle of the device. Detailed Implementation
[0031] An example of a multi-component mixing apparatus 10 according to an embodiment of the present invention is shown in Figures 1 to 5 middle.
[0032] The mixing device 10 includes at least a first supply device 12 for a first product, a second supply device 14 for a second product, a mixing chamber 16, and a nozzle 18.
[0033] A nozzle is understood as a device that allows a product of any viscosity to pass through; it is also called a syringe or dispensing device, such as a slit nozzle as described below.
[0034] The mixing chamber 16 defines the mixing space 20.
[0035] The mixing chamber 16 is made of stainless steel, for example.
[0036] The mixing chamber 16 has at least a first inlet 22 and a second inlet 24, and further has an outlet 26.
[0037] The mixing chamber 16 has a flow axis D.
[0038] The flow axis D is essentially vertical here. This allows gravity to facilitate the flow.
[0039] The mixing chamber 16 extends along the flow axis D between the first and second ends.
[0040] The first end here corresponds to the upper end 28 of the mixing chamber 16.
[0041] The second end here corresponds to the lower end 30 of the mixing chamber 16.
[0042] In the illustrated example, the mixing chamber 16 has a generally hollow cylindrical shape with the flow axis D as the cylindrical axis.
[0043] Here, the mixing chamber 16 has a radius of, for example, 7.5 mm.
[0044] The mixing chamber 16 includes a sidewall 32 between the upper end 28 and the lower end 30.
[0045] The first entrance 22 is defined by the side wall 32.
[0046] The sidewall 32 is basically cylindrical.
[0047] The first entrance 22 has a disc shape that protrudes onto the side wall 32.
[0048] The second entrance, number 24, is located at the upper end, number 28.
[0049] The second inlet 24 is centered on the flow axis D.
[0050] The second entrance 24 has a disc shape.
[0051] Outlet 26 here corresponds to the lower end 30 of mixing chamber 16.
[0052] The outlet 26 is centered on the flow axis D.
[0053] Export 26 has a disc shape.
[0054] The first supply device 12 enters the mixing chamber 16 at the first inlet 22.
[0055] The first supply device 12 includes a first product source (not shown) and a first supply pipeline 34.
[0056] For example, the first supply pipe 34 is made of stainless steel.
[0057] The first supply conduit 34 includes a first downstream portion 36 that leads into the mixing chamber 16, more specifically into the first inlet 22.
[0058] In the example shown, the first downstream portion 36 has a cylindrical shape.
[0059] The first supply device 12 is adapted to introduce the first product into the mixing chamber 16 along the central supply axis D'.
[0060] Here, the first downstream section 36 extends primarily along the central supply axis D'.
[0061] More specifically, the first downstream portion 36 has a central supply axis D' as its cylindrical axis.
[0062] The central supply axis D' and the flow axis D form an angle between 0° and 135°, more specifically, an angle between 0° and 90°.
[0063] With an angle of 0°, the central supply axis and the flow axis coincide. The first supply device and the second supply device are coaxial. More specifically, the first inlet extends around the second inlet. For example, the first inlet has an annular shape, and the second inlet has a disk shape surrounded by the inner diameter of the annulus.
[0064] The selected angle is particularly capable of achieving more or less turbulent or near-laminar flow.
[0065] In the example shown, the central supply axis D' is orthogonal to the flow axis D. The central supply axis D' extends in a plane perpendicular to the flow axis D.
[0066] For example, the central supply axis D' is horizontal.
[0067] The central supply axis D' and the flow axis D each define a corresponding straight line.
[0068] The straight lines defined by the central supply axis D' and the flow axis D do not intersect.
[0069] The minimum distance d between straight lines corresponds to the distance between straight lines.
[0070] The distance d is non-zero.
[0071] The non-zero distance d is referred to below as the offset 38 between the center supply axis D' and the flow axis D.
[0072] The offset is large, meaning it cannot be ignored and is visible to the naked eye.
[0073] The offset is between 3% and the mixing chamber radius value, and more specifically between 10% and the mixing chamber radius value.
[0074] More specifically, for a mixing chamber radius of 6.0 mm, the offset is between 2.0 mm and 6.0 mm.
[0075] The offset specifically allows the first product to flow into the mixing space 20 with a swirling effect.
[0076] In particular, this promotes mixing in the mixing chamber 16 by generating turbulence.
[0077] The distance between the first inlet 22 and the second inlet 24 along the flow axis D is less than or equal to 15.0 mm, preferably 13.0 mm, and most preferably 12.0 mm.
[0078] In the illustrated example, the distance between the first inlet 22 and the second inlet 24 along the flow axis D corresponds to the so-called upper distance between the second inlet 24 and the first inlet 22 along the flow axis D.
[0079] The first supply device 12 is adapted here to generate a first product flow that continuously flows into the first inlet 22.
[0080] For example, the first supply pipe 34 has no valve.
[0081] In one variant, the first supply conduit 34 is provided with a valve configured to control the flow of the first product at the first inlet 22.
[0082] For example, the first supply device 12 does not have a nozzle suitable for injecting the first product from the first supply device as a flat jet into the mixing chamber. More specifically, the first supply device 12 does not have a nozzle at all.
[0083] The second supply device 14 enters the mixing chamber 16 at the second inlet 24.
[0084] The second supply device includes a second product source (not shown) and a second supply pipeline 40.
[0085] For example, the second supply pipe 40 is made of stainless steel.
[0086] The second supply conduit 40 has an inner surface 41 that defines a passage for the second product.
[0087] The second supply conduit 40 includes a second downstream portion 42 that leads into the mixing chamber 16, and more specifically into the mixing chamber 16 at the second inlet 24.
[0088] The second supply device 14 is adapted to make the pressure of the second product (more specifically, at the second inlet 24) strictly higher than the pressure of the first product (more specifically, at the first inlet 22).
[0089] The pressure of the first product is, for example, 1 bar (i.e., 1.10). 5 Pa) and 500 bar (i.e., 5.10) 7 Between Pa).
[0090] The pressure of the second product is at least 1.0% higher than that of the first product, and usually at least 5.0% higher.
[0091] This value depends specifically on the viscosity of each product being mixed.
[0092] This allows for improvements in the specific uniformity of the mixture.
[0093] Nozzle 18 is arranged and adapted to inject a second product from second supply device 14 as a flat jet into mixing chamber 16.
[0094] The jet has a jet angle α at the nozzle exit that is between 50° and 80°.
[0095] Nozzle 18 is arranged to inject a second product around a central injection axis, which is aligned with or coincides with the flow axis D.
[0096] All of the second product flows through nozzle 18 before reaching mixing chamber 16.
[0097] Nozzle 18 is made of molten carbide, such as tungsten, 316 stainless steel or ceramic.
[0098] Nozzle 18 is arranged in the second supply device 14 and is located near the second inlet 24.
[0099] Nozzle 18 is housed in the second supply conduit 40, and more specifically, in the second downstream section 42.
[0100] In the illustrated example, nozzle 18 is held within the second supply conduit 40 by nozzle holder 43, which will be described later.
[0101] The nozzle 18 has a shape that is rotationally symmetrical about the central injection axis D.
[0102] Nozzle 18 has a downstream end 44, which corresponds to the most downstream point of nozzle 18 when the flow of the second product is taken into account.
[0103] The downstream end 44 is located near the second entrance 24.
[0104] The downstream end 44 and the second inlet 24 are spaced apart by a distance strictly less than 5.0 mm, for example, preferably 3.0 mm, most preferably 2.0 mm.
[0105] For example, the downstream end 44 is located at the distance upstream of the second inlet 24. Therefore, the injection of the second product will deliver the second product into the mixing chamber 16.
[0106] In one variation, the downstream end 44 extends downstream of the second inlet 24 into the mixing chamber 16. The nozzle 18 thus protrudes slightly into the mixing chamber 16 at the downstream end 44.
[0107] In the direction of the flow axis D, the distance e between the first inlet 22 and the downstream end 44 is less than or equal to 10.0 mm.
[0108] In the flow axis D direction, the distance between the first inlet 22 and the downstream end 44 corresponds, in the illustrated example, the distance between the downstream end 44 and the upper end of the first inlet 22 in the flow axis D direction.
[0109] The nozzle 18 extends along the central injection axis D between the downstream end 44 and the upstream end 46.
[0110] The nozzle 18 has an upstream face 48 housed in a second supply pipe and a downstream face 50 opposite the upstream face 48 and facing the mixing chamber 16.
[0111] Upstream face 48 defines upstream end 46.
[0112] Downstream face 50 defines downstream end 44.
[0113] The upstream face 48 is basically flat and is arranged basically transversely to the central injection axis D.
[0114] The downstream surface 50 is dome-shaped, centered on the central injection axis D, and has at least one slot, which in the example shown is a single slot 52, perpendicular to the central injection axis D.
[0115] The slot 52 has a lip 54, and the lip 54 forms an angle between each other, typically between 5° and 150°, preferably between 20° and 110°.
[0116] The nozzle 18 here has an external shape comprising two cylindrical portions, the first cylindrical portion 56 defining the upstream surface 48 and the second cylindrical portion 58 terminating at a dome defining the downstream surface 50.
[0117] Each cylindrical section uses the central injection axis D as its cylindrical axis.
[0118] The diameter of the first cylindrical portion 56 is strictly larger than the diameter of the second cylindrical portion 58.
[0119] The nozzle 18 then defines an outer shoulder 60 on its outer surface.
[0120] The shoulder 60 is circumferential here.
[0121] Nozzle 18 defines at least one channel 64.
[0122] In the example shown, nozzle 18 defines a single channel 64.
[0123] In one variant, nozzle 18 defines multiple channels, for example, between two and ten.
[0124] Nozzle 18 defines at least one injection port 62, which is a single injection port in the example shown, where each injection port 62 leads to the downstream face 50.
[0125] Nozzle 18 here includes as many channels 64 and injection ports 62 as slot 52.
[0126] Each injection port 62 forms part of or a corresponding channel of channel 64, more specifically the downstream portion of the channel.
[0127] In the example shown, each channel 64 also includes an inlet cavity 66 in the nozzle, followed by a flow channel 68.
[0128] More specifically, each channel 64 consists of an inlet 66, a flow channel 68, and an injection port 62 from upstream to downstream.
[0129] The oral cavity 66 leads to the upstream surface 48.
[0130] The inlet 66 has a cross-sectional area that decreases downstream.
[0131] Here, the inlet cavity 66 is rotationally symmetric about the central injection axis D, and the diameter of the inlet cavity 66 decreases from the upstream end 46 or upstream surface 48 of the nozzle 18 toward the flow channel 68.
[0132] In the example shown, the inlet 66 is bell-shaped.
[0133] The flow channel 68 has a constant cross-sectional area.
[0134] The flow channel 68 has a cylindrical shape, with the central injection axis D serving as the cylindrical axis.
[0135] The flow channel 68 extends continuously with the inlet oral cavity 66.
[0136] The injection port 62, from upstream to downstream, includes or is formed by a narrow portion 70 of the channel and a corresponding slot 52.
[0137] The narrowing section 70 forms the narrowing section of the flow channel 68 at the downstream end of the flow channel 68.
[0138] The narrowing section 70 forms a circular channel portion.
[0139] For example, the narrowing portion 70 has a dome shape separated by the slot 52.
[0140] The slot 52 has increasing dimensions from upstream to downstream.
[0141] The intersection 72 of the slot 52 and the narrowing section 70 forms an ellipse.
[0142] An ellipse has an equivalent diameter of 0.3 mm and 2.0 mm, meaning its area is equal to the area of a circle with an equivalent diameter.
[0143] The nozzle holder 43 is adapted to carry the nozzle 18 and hold it together with the second supply conduit 40.
[0144] The nozzle holder 43 is made of stainless steel, for example.
[0145] The nozzle holder 43 is rotationally symmetric about the central injection axis D.
[0146] The nozzle support 43 includes an outer surface 74 adapted to interact with the inner surface 41 of the second supply conduit 40.
[0147] For example, the inner surface 41 of the second supply pipe 40 has an internal thread, and the outer surface 74 has a thread that is complementary to the internal thread.
[0148] In one variation, the nozzle support 43 retracts into the second supply conduit 40, for example, under heating, such that the outer surface 74 extends against the inner surface 41 of the second supply conduit 40.
[0149] The nozzle holder 43 has an upstream surface 76 and a downstream surface 78 along the central injection axis D.
[0150] The nozzle holder 43 further defines the housing 80, which is configured to receive the nozzle 18, more specifically in the downstream portion of the nozzle holder 43.
[0151] For example, housing 80 is a through hole along the central injection axis D.
[0152] The through-hole is defined by the inner surface 81 of the nozzle holder 43.
[0153] The through hole leads to the upstream face 76 on one side and to the downstream face 78 on the other.
[0154] The cross-section of the through hole decreases from upstream to downstream.
[0155] The through hole has a shoulder 82.
[0156] The shoulder 82 is formed by narrowing from upstream to downstream through a through hole.
[0157] The shoulder 60 of nozzle 18 interacts with the shoulder 82 of nozzle support 43.
[0158] The seal 84 is located between the shoulder 60 of the nozzle 18 and the shoulder 82 of the nozzle support 43.
[0159] The seal 84 is made of, for example, polytetrafluoroethylene (PTFE).
[0160] In one variant, seal 84 is replaced by adhesive.
[0161] The shoulder 82 of the nozzle holder 43 forms a stop for stopping the nozzle 18 in the upstream to downstream direction along the central injection axis D.
[0162] The nozzle 18 is further held by the second stop system in the downstream-to-upstream direction along the central injection axis D.
[0163] The through-hole defines the complementary tool cavity 85 in the upstream portion, such as a hexagonal cross-section cavity.
[0164] This specifically allows the use of tools to secure the nozzle holder 43 in the second supply pipe 40, for example, by screwing the nozzle holder 43 into the second supply pipe 40 with a tool.
[0165] Another seal 86 is disposed between the nozzle support 43 and the inner surface 41 of the second supply pipe 40.
[0166] Seal 86 is made of, for example, PTFE.
[0167] The nozzle 18 is received in the nozzle holder 43 such that the downstream end 44, more specifically the entire downstream face 50 of the nozzle 18, protrudes from the nozzle holder 43 at the downstream face 78.
[0168] The second supply device 14 also includes an injection valve 88.
[0169] Injection valve 88 is adapted to allow a second product to pass selectively through it.
[0170] Injection valve 88 is arranged here in the second supply device, more specifically in the second supply conduit 40, upstream of nozzle 18.
[0171] The injection valve 88 includes a system comprising an element 90 movable relative to the base 92, which is designed to allow the passage of a second liquid when the element is moved away from the base and to prevent the passage of the second liquid when the element extends against the base.
[0172] The base 92 defines a channel 95 having a cross-section that gradually decreases from upstream to downstream.
[0173] For example, the channel has a truncated conical shape.
[0174] The second supply device ensures that the second product of the second supply device must pass through the channel 95 defined by the base 92 before reaching the nozzle 18 and / or the mixing chamber 16.
[0175] The base 92 is fixed relative to the nozzle 18.
[0176] More specifically, the base 92 here is integrated with the nozzle support 43, for example, by retaining element 96.
[0177] The retaining element 96 has an outer surface 98 that is configured to interact with the inner surface 81 of the nozzle holder.
[0178] The outer surface 98 has an internal thread, for example, complementary to the thread of the inner surface 81 of the nozzle holder.
[0179] The retaining element 96 also has a shoulder 100 that is capable of retaining the base along the central injection axis in the downstream to upstream direction.
[0180] In the example shown, the retaining element 96 has a notch 102 that is complementary to the tool.
[0181] For example, notch 102 corresponds to a slot perpendicular to the central injection axis. For example, indentation (notch) 102 is complementary to a screwdriver.
[0182] This specifically allows the use of tools to install the retaining element 96 in the nozzle holder.
[0183] The portion of the base 92 near the downstream direction rests on the nozzle 18.
[0184] Therefore, the base 92 forms a second abutment system of the nozzle 18 along the central injection axis D, while the nozzle 18 forms an abutment system for stopping the base 92 in the upstream-to-downstream direction along the central injection axis.
[0185] The seal 104 is arranged between the base 92 and the nozzle 18.
[0186] Seal 104 is made of, for example, PTFE.
[0187] Therefore, here, apart from the seal 104, the nozzle 18 and the base 92 are held fixed relative to the nozzle support 43 along the central injection axis D by the shoulder 60 on the one hand and by the retaining element integrated with the nozzle support 43 on the other.
[0188] In one variant, the base 92 is directly fixed to the nozzle bracket 43.
[0189] Through this base, the movable element 90 can controllably and selectively open or close the channel 95.
[0190] More specifically here, element 90 includes a ball 106 carried at one end of needle 108.
[0191] The ball 106 is sized to close the channel 95 when it rests on the edge of the channel 95.
[0192] Therefore, injection valve 88 controls the passage through which the second product reaches nozzle 18 via second supply pipe 40 and is thus injected into mixing chamber 16.
[0193] For example, the base 92 and the movable element 90 are made of stainless steel.
[0194] In the example shown, device 10 also includes an air supply device 110, and mixing chamber 16 also has an air inlet 112.
[0195] Air supply device 110 enters mixing chamber 16 through air inlet 112.
[0196] Air inlet 112 is located in the side wall 32 of mixing chamber 16.
[0197] Air inlet 112 is arranged downstream of the first inlet 22 of the first product along the flow direction D.
[0198] Air is radially injected into mixing chamber 16.
[0199] This specifically generates additional turbulence to promote mixing.
[0200] In an example not shown, the device does not include a nozzle holder; the nozzle is directly attached to the inner surface of the second supply conduit. For example, if present, the base is also directly attached to the inner surface of the second supply conduit.
[0201] In a variant not shown, the device includes more than two product inlets leading into a mixing chamber for mixing more than two products in the mixing chamber. At least one inlet is equipped with a nozzle as described above. More specifically, all inlets except for one are equipped with corresponding nozzles.
[0202] In another variation, not shown, the device includes a second mixing chamber, which similarly includes a first product inlet and a second product inlet. The second mixing chamber is arranged downstream of the aforementioned mixing chamber, and its outlet forms a supply device connected to the first inlet of the second mixing chamber. A supply device for a third product is connected to the second inlet of the second mixing chamber. This allows for the continuous mixing of three products.
[0203] Therefore, the device may include multiple mixing chambers arranged in series as needed, with the outlet of each mixing chamber connected to the first inlet of the next mixing chamber, except for the last mixing chamber.
[0204] Typically, when mixing a given number of n products, the equipment includes n-1 nozzles, with one nozzle for each product inlet, except for the product inlet called the mixing base.
[0205] The method for assembling device 10 as described with respect to the accompanying drawings will now be described.
[0206] The method can be applied to variations that allow the assembly of devices not shown.
[0207] As previously described, an apparatus including a first supply device 12, a second supply device 14, and a mixing chamber 16 is provided.
[0208] As described above, the nozzle 18 is disposed at the second supply device 14 so as to inject the second product from the second supply device into the mixing chamber as a flat jet.
[0209] More specifically, the nozzle 18 is positioned in the nozzle holder 43, which is in the through hole, such that the shoulder 60 of the nozzle 18 rests on the shoulder 82 of the nozzle holder 43.
[0210] Seal 84, which is annular, is advantageously positioned, for example, between shoulders 60 and 82.
[0211] For example, seal 104, which is annular, is placed on nozzle 18.
[0212] Then place the base 92 as described above.
[0213] Then, the retaining element 96 is inserted into the nozzle holder 43 to hold it integrally with the nozzle holder 43. The retaining element 96 is screwed into the nozzle holder 43, for example, with a screwdriver.
[0214] Here, the assembly formed by the nozzle 18, the base 92, the retaining element 96, and, if necessary, the corresponding seals, is integrated with the nozzle support 43 in the through hole.
[0215] A seal 86, which is annular in this case, is disposed on the outer surface of the nozzle holder 43 so as to extend between the nozzle holder 43 and the inner surface 41 of the second supply conduit 40.
[0216] The nozzle holder 43 is then inserted into the second supply pipe 40 and secured to the second supply pipe 40 by, for example, tightening with an Allen wrench, or by shrinking in a variant.
[0217] The nozzle holder 43 allows the nozzle 18 to inject the second product into the mixing chamber.
[0218] The movable element 90 is then positioned together with the movable member actuator such that the member can move between a sealed position and a passage position, in which the member extends against the base and in the passage position extends away from the base 92.
[0219] The method of mixing at least the first product and the second product will now be described.
[0220] As previously described, device 10 is provided.
[0221] The first product is supplied to the mixing chamber 16 by the first supply device 12 at the first inlet 22.
[0222] The second product is supplied from the second supply device 14.
[0223] As mentioned earlier, the pressure of the second product is strictly greater than that of the first product, in particular by at least 1.0%, and usually by at least 5.0%.
[0224] The second product is injected into the mixing chamber 16 as a flat jet through nozzle 18.
[0225] The jet has a jet angle α at the nozzle exit that is between 50° and 80°.
[0226] More specifically, in the example shown, element 90 is spaced apart from base 92 to allow the second product to pass through valve 88.
[0227] The second product enters nozzle 18 and exits nozzle 18 at injection port 62.
[0228] The second product is injected onto the first product, which is injected into the mixing chamber, in the form of a flat jet.
[0229] Compared to trickle mixing, this promotes mixing because the second product and the first product form a larger contact area.
[0230] This allows for better distribution of the second product within the first product. The first and second products are thus uniformly mixed at the outlet of the mixing chamber.
[0231] This mixing device allows the base material to be mixed with a catalyst to form coating products, for example, particularly in the paint industry.
Claims
1. A multi-component mixing apparatus (10), comprising at least a first supply device (12) for a first product and a second supply device (14) for a second product, the mixing apparatus (10) having a mixing chamber (16) having at least a first inlet (22) and a second inlet (24), the first supply device (12) being introduced into the mixing chamber (16) at the first inlet (22), and the second supply device (14) being introduced into the mixing chamber (16) at the second inlet (24), characterized in that, The mixing device (10) includes a nozzle (18) arranged to inject the second product from the second supply device (14) as a flat jet into the mixing chamber (16). The mixing chamber (16) has a flow axis (D). The nozzle (18) is arranged to inject the second product around a central injection axis aligned with the flow axis (D). The first supply device (12) is used to introduce the first product into the mixing chamber (16) along the central supply axis (D'), and there is a non-zero minimum distance between the straight line containing the central supply axis (D') and the flow axis (D), which represents the offset (38) between the central supply axis (D') and the flow axis (D). The jet angle (α) of the flat jet is between 50° and 80°. The nozzle (18) is arranged in the second supply device (14), the nozzle (18) includes a downstream end (44), and the distance between the first inlet (22) and the downstream end (44) in the direction of the flow axis (D) is less than or equal to 10.0 mm.
2. The mixing device according to claim 1, characterized in that, The nozzle (18) is arranged in the second supply device (14), and the nozzle (18) includes a downstream end (44) arranged near the second inlet (24).
3. The mixing device according to claim 2, characterized in that, The distance between the downstream end (44) of the nozzle (18) and the second inlet (24) is strictly less than 5.0 mm.
4. The mixing apparatus according to claim 1 or 2, characterized in that, The second supply device (14) is used to make the pressure of the second product strictly higher than the pressure of the first product.
5. The mixing apparatus according to claim 1 or 2, characterized in that, The nozzle (18) defines at least one channel (64), each channel including an injection port (62), the injection port (62) including a circular channel portion (70) from upstream to downstream and a slot (52) located directly downstream of the circular channel portion (70), the circular channel portion (70) and the slot (52) having an intersection (72) that forms an ellipse.
6. The mixing apparatus according to claim 1 or 2, characterized in that, The mixing chamber (16) has a flow axis (D), and the first supply device (12) is used to introduce the first product into the mixing chamber (16) along the central supply axis (D'), the angle between the central supply axis (D') and the flow axis (D) being between 0° and 135°.
7. The mixing apparatus according to claim 1 or 2, characterized in that, Includes an air supply device (110), the mixing chamber (16) has an air inlet (112), the air supply device (110) enters the mixing chamber (16) at the air inlet (112).
8. A mixing method for mixing at least a first product and a second product, characterized in that, The method includes the following steps: Provide a mixing device (10) according to claim 1 or 2; The first product is supplied at the first entrance (22); Supply the second product to the second inlet (24); and The second product is injected into the first product in the mixing chamber (16) as a flat jet through the nozzle (18).