TWM593908U - Nozzle apparatus - Google Patents

Abstract

A nozzle device includes a body connected to an outer tube, a nozzle connected to the body, and a cover connected to the body and surrounding the nozzle and defining an annular chamber. The body includes a surrounding wall defining a channel. The channel is suitable for passing an inner tube. The surrounding wall has a hole communicating with the channel and the outside. The nozzle includes a large-diameter hole and a small-diameter hole connected to the channel, a tapered section connected to the end surface adjacent to the small-diameter hole, and a guide section connected to the end surface adjacent to the large-diameter hole. The large-diameter hole sleeves the inner tube. The small-diameter hole is used to cause the passing carbon dioxide gas to generate particles due to the phase change. When the compressed gas enters the ring chamber through the hole, a spiral gas flow is generated in the ring chamber through the hole, and flows in accordance with the conical section, and entrains the external air flow and particles to be injected forward. In this way, the air flow restricted by the annular chamber can only flow along the conical section, which not only can increase the flow velocity, but also improve the collimation during injection.

Description

Nozzle device

The present invention relates to a nozzle device, in particular to a nozzle device capable of injecting carbon dioxide particles.

Referring to FIG. 1, a conventional nozzle device 1 disclosed in US Patent No. 20070164130 is described, which mainly includes a body 11 and a nozzle 12 connected to the body 11. The body 11 has an axial hole 111 through which compressed gas passes, and an annular chamber 112 communicating with the axial hole 111 and the outside. The nozzle 12 is used to spray carbon dioxide particles. In this way, when the compressed gas is ejected from the axial hole 111 through the annular chamber 112 to the outside world, the external air flow and the carbon dioxide particles are carried forward due to the Coandă Effect, thereby increasing the flow velocity and generating more Good spray effect.

However, since the annular chamber 112 has multiple turns, the compressed gas will reduce the pressure of the gas during the discharge of the outside world, and it is important that after the compressed gas is discharged from the outside world, although some of the gas will Flowing toward the outer surface of the nozzle 12, but there will be another part of the gas will escape to the outside when leaving the body 11, so that the effect of increasing the flow rate still needs to be improved.

Therefore, the purpose of the present invention is to provide a nozzle device capable of increasing the flow velocity and improving the jet collimation.

Therefore, the new nozzle device is suitable for connecting an outer tube conveying compressed gas and an inner tube conveying two gasified carbon gases. The nozzle device includes: a body, a nozzle, and an outer cover.

The body is connected to the outer tube and includes a surrounding wall that surrounds an axis and defines a channel. The channel is suitable for passing through the inner tube. The surrounding wall has at least one hole communicating with the channel and the outside world.

The nozzle is connected to the body and includes a large-diameter hole and a small-diameter hole extending from one end surface to the other end surface in the axial direction and communicating with the channel, and a tapered surface connecting the end surfaces adjacent to the small-diameter hole Segment, and a guiding segment connected to the end face adjacent to the large-diameter hole, the large-diameter hole is suitable for sheathing the inner tube, and the small-diameter hole is suitable for passing carbon dioxide particles due to phase change to generate carbon dioxide particles .

The outer cover is connected to the body, and surrounds the guiding section and part of the conical section of the nozzle, and defines a ring chamber communicating with the at least one channel. When compressed gas enters the ring chamber from the at least one channel, A spiral airflow is generated in the ring chamber, and flows in accordance with the conical surface section, and entrains the external airflow and jets the carbon dioxide particles in the direction opposite to the body.

The effect of the present invention lies in that the annular chamber restricts the air flow to flow only along the conical section, which not only can increase the flow velocity, but also improve the collimation when spraying.

2, 3 and 4, an embodiment of the novel nozzle device is suitable for connecting an outer tube 2 for conveying compressed gas and an inner tube 3 for conveying two gasified carbon gases. The nozzle device includes a body 4, a nozzle 5, a cover 6, and an airtight gasket 7.

The body 4 includes a surrounding wall 41 that surrounds an axis X and defines a channel 40. The minimum aperture of the channel 40 is larger than the maximum outer diameter of the inner tube 3, and is suitable for passing through the inner tube 3. The surrounding wall 41 has a first connecting section 411, a second connecting section 412 and a third connecting section 413 extending along the axis X direction, and formed between the first connecting section 411 and the second connecting section 412的一环缘414. The first connecting section 411 is sleeved on the outer tube 2. The outer diameter of the second connection section 412> the outer diameter of the third connection section 413. The third connecting section 413 has a number of channels 415 extending in the tangential direction and communicating with the channel 40 and the outside (see FIG. 5). The rim 414 is adapted to abut the outer tube 2.

The nozzle 5 is sleeved on the third connecting section 413 of the body 4 and abuts against the rim 414 of the body 4, and includes a large portion extending from one end surface along the axis direction to the other end surface and communicating with the channel 40 The diameter hole 51 and a small-diameter hole 52, an abutment surface 53 defined between the large-diameter hole 51 and the small-diameter hole 52, a tapered section 54 connecting the end surfaces of the adjacent small-diameter holes 52, and the connection A guide section 55 adjacent to the end surface of the large-diameter hole 51. The large-diameter hole 51 is suitable for sleeve-connecting the inner tube 3. The small-diameter hole 52 is suitable for causing the carbon dioxide gas passing through to generate carbon dioxide particles due to a phase change. The abutment surface 53 abuts against the inner tube 3 to prevent the inner tube 3 from moving due to internal compressed air pressure. The length L1 of the guide section 55 along the axis X direction is greater than the length L2 of the tapered section 54 along the axis X direction. And the outer diameter of the tapered section 54 gradually decreases from one end adjacent to the body 4 toward the other end away from the body 4.

The outer cover 6 is connected to the second connecting section 412 of the body 4, and surrounds the guiding section 55 of the nozzle 5 and part of the conical section 54, and defines a ring chamber 60 communicating with the holes 415. The outer cover 6 is tapered, and the outer diameter gradually decreases from one end adjacent to the body 4 toward the other end away from the body 4.

The gas-tight gasket 7 is disposed between the large-diameter hole 51 of the nozzle 5 and the second connecting section 412 of the body 4, and is suitable for blocking compressed gas in the channel 40 of the body 4 from entering the large-diameter hole 51 of the nozzle 5.

5 and 6, when the carbon dioxide gas flows through the inner tube 3 toward the small-diameter hole 52 of the nozzle 5, a phase change occurs due to the pressure difference and particles are generated, forming gas-solid coexisting carbon dioxide and carbon dioxide particles, and The carbon dioxide particles will grow larger and larger during the stroke of the small-diameter hole 52.

When the compressed gas enters the channel 40 of the body 4 through the outer tube 2, the compressed gas will enter the annular chamber 60 from the channel 40 through the holes 415. Since the holes 415 extend in a tangential direction, relative to the The compressed gas sprayed by the outer cover 6 at an inclination angle will form a spiral flow around the axis X and follow the guide section 55 of the nozzle 5 and the conical section 54 under the condition of being blocked by the outer cover 6, and in After leaving the ring chamber 60, because the Coandă effect entrains the external air flow to follow the conical section 54 to flow away from the body 4, the flow velocity, stronger propulsion, and the direction of integration with the carbon dioxide gas are faster A more collimated airflow, while carrying carbon dioxide particles to the outside. In this way, in the cutting process, the airflow and carbon dioxide particles with a small spray area can smoothly remove the dust on the surface of the workpiece to achieve the effect of cooling and cleaning.

It is worth noting that the outer tube 2 is not limited to conveying only compressed gas. In other forms of this embodiment, the outer tube 2 may also be provided with an intermediate tube (not shown) for conveying lubricant. Therefore, the lubricant of the intermediate pipe (not shown) will also enter the annular chamber 60 along with the compressed gas in the outer pipe 2, and will be mixed with the aforementioned gaseous-solid carbon dioxide and sprayed to the outside, thereby achieving a lubricating effect. Improve the life of machining tools and the smoothness of the workpiece surface.

Since those with ordinary knowledge in the art can infer extended details based on the above description, no more explanation will be given.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. Since the outer cover 6 surrounds the conical section 54 of the nozzle 5, the present invention can use the outer cover 6 and its annular chamber 60 to restrict the flow of air only along the conical section 54 and thereby greatly reduce the compression of overflow The gas can not only increase the velocity of the jet flow, but also importantly, it can improve the collimation of the jet and reduce the spray area.

2. The inner tube 3 is fixed in the large-diameter hole 51 of the nozzle 5, and the nozzle 5 is connected and fixed to the third connecting section 413 of the body 4, therefore, the stability between the components can be strengthened and the shaking can be reduced Situation.

3. The holes 415 of the new type extend in a tangential direction without any turning, and can reduce the loss of kinetic energy, and the generated helical airflow can further reduce the spray area.

However, the above are only examples of the new model. When the scope of the new model cannot be limited by this, any simple equivalent changes and modifications made according to the patent application scope and patent specification content of the new model are still regarded as Within the scope of this new patent.

2: outer tube 3: inner tube 4: Ontology 40: channel 41: Around the wall 411: first connection segment 412: Second connection segment 413: third connection segment 414: Ring 415: Hole 5: Nozzle 51: Large diameter hole 52: Small diameter hole 53: contact surface 54: Conical section 55: Guide segment 6: outer cover 60: Ring room 7: Gas-tight washer X: axis L1: Length L2: Length

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: 1 is a cross-sectional view illustrating a conventional nozzle device disclosed in US Patent No. 20070164130; 2 is a cross-sectional view illustrating an embodiment of the new nozzle device of the present invention; 3 is an exploded perspective view of the embodiment; 4 is a combined perspective view of the embodiment; 5 is a cross-sectional view taken along the line V-Ⅴ in FIG. 2; and FIG. 6 is a schematic cross-sectional view of the embodiment.

2: outer tube

3: inner tube

4: Ontology

40: channel

41: Around the wall

411: first connection segment

51: Large diameter hole

52: Small diameter hole

53: contact surface

54: Conical section

55: Guide segment

6: outer cover

412: Second connection segment

413: third connection segment

414: Ring

415: Hole

5: Nozzle

60: Ring room

7: Gas-tight washer

X: axis

L1: Length

L2: Length

Claims (10)

A nozzle device is suitable for connecting an outer tube conveying compressed gas and an inner tube conveying two gasified carbon gases. The nozzle device includes: A body connected to the outer tube and comprising a surrounding wall surrounding an axis and defining a channel, the channel is suitable for passing through the inner tube, the surrounding wall has at least one hole communicating with the channel and the outside world; A nozzle is connected to the body and includes a large-diameter hole and a small-diameter hole extending from one end surface to the other end surface in the axial direction and communicating with the channel, and a cone connecting the end surfaces adjacent to the small-diameter hole A face section, and a guide section connecting the end face adjacent to the large-diameter hole, the large-diameter hole is suitable for sheathing the inner tube, and the small-diameter hole is suitable for causing the passing carbon dioxide gas to generate carbon dioxide due to phase change Granules; and An outer cover is connected to the body and surrounds the guide section and part of the conical section of the nozzle, and defines a ring chamber communicating with the at least one hole. When compressed gas enters the ring chamber from the at least one hole, A spiral air flow is generated in the ring chamber, and flows in accordance with the conical section, and entrains the external air flow and the two gasified carbon particles to be sprayed in the direction opposite to the body. The nozzle device according to claim 1, wherein the surrounding wall of the body has a first connecting section, a second connecting section and a third connecting section extending along the axis direction, the first connecting section is sleeved on In the outer tube, the second connecting section is sleeved on the outer cover, the third connecting section is sleeved on the nozzle, and has the at least one hole. The nozzle device according to claim 2, wherein the minimum aperture of the channel of the body is larger than the maximum outer diameter of the inner tube, and the outer diameter of the second connection section> the outer diameter of the third connection section. The nozzle device according to claim 2, wherein the body further includes a rim formed between the first connection segment and the second connection segment, the rim being adapted to abut the outer tube. The nozzle device according to claim 2, further comprising a gas-tight gasket, which is disposed between the large-diameter hole of the nozzle and the second connecting section of the body, and is suitable for blocking the entry of compressed gas in the channel of the body The large diameter hole of the nozzle. The nozzle device according to claim 1, wherein the nozzle further includes an abutment surface defined between the large-diameter hole and the small-diameter hole, and the abutment surface abuts against the inner tube. The nozzle device according to claim 6, wherein the length of the guide section of the nozzle along the axis direction is greater than the length of the tapered section along the axis direction. The nozzle device according to claim 1, wherein the outer diameter of the conical section of the nozzle gradually decreases from one end adjacent to the body toward the other end away from the body. The nozzle device according to claim 1 or 8, wherein the outer cover is tapered, and the outer diameter gradually decreases from one end adjacent to the body toward the other end away from the body. The nozzle device according to claim 1, wherein the surrounding wall of the body has several holes, and each hole extends in a tangential direction.

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