TWI780377B - Nozzle device - Google Patents

Abstract

A nozzle device includes a body connected to an outer tube, a nozzle connected to the body, and a casing 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 connecting the end surfaces adjacent to the small-diameter hole, and a guide section connecting the end surfaces adjacent to the large-diameter hole. The large-diameter hole is sleeved on the inner tube. The small-diameter holes are used to generate particles due to the phase change of passing carbon dioxide gas. When the compressed gas enters the annular chamber from the hole, it will follow the flow of the cone section, and carry the external airflow and particles to spray forward. In this way, the annular chamber is used to restrict the air flow to only flow along the conical surface section, which not only increases the flow rate, but also improves the collimation during spraying.

Description

Nozzle device

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

Effect)挾帶外界氣流與二氧化碳顆粒向前噴射，進而提升流速，並產生更好的噴射效果。 Referring to FIG. 1 , a conventional nozzle device 1 disclosed in US Patent No. 20070164130 is illustrated, 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 injected from the axial hole 111 through the annular chamber 112 to the outside, due to the Coanda effect (Coand

Effect) carries the external airflow and carbon dioxide particles to spray forward, thereby increasing the flow velocity and producing a better spray effect.

However, since the annular chamber 112 has multiple turning points, the pressure of the compressed gas will be reduced due to the turning points during the process of discharging the compressed gas to the outside, and what is important is that after the compressed gas is discharged to the outside, although part of the gas will flow along the Flows along the outer surface of the nozzle 12, but there will also be another part of the gas that will overflow to the outside when leaving the main body 11 Dispersion, so that the effect of increasing the flow rate still needs to be improved.

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

Therefore, the nozzle device of the present invention is suitable for connecting an outer pipe for conveying compressed gas and an inner pipe for conveying carbon dioxide gas, and 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 surrounding an axis and defining a channel suitable for passing through the inner tube. The surrounding wall has at least one hole communicating the channel with the outside.

The nozzle is connected to the body, and includes a large-diameter hole and a small-diameter hole extending from one end surface along the axis direction to the other end surface and communicating with the channel, and a tapered surface connecting the end surface of the adjacent small-diameter hole segment, and a guide segment connected to the end surface adjacent to the large-diameter hole, the large-diameter hole is suitable for socketing the inner tube, and the small-diameter hole is suitable for causing the passing carbon dioxide gas to produce carbon dioxide particles due to phase change.

The outer cover is connected to the body, and surrounds the guide section and part of the cone section of the nozzle, and defines an annular chamber communicating with the at least one hole. When the compressed gas enters the annular chamber through the at least one hole, it will Follow the flow of the conical surface section, and carry the external airflow and carbon dioxide particles to spray against the direction of the main body.

The effect of the present invention is that the annular chamber restricts the air flow to only flow along the conical section, which not only increases the flow rate, but also improves the collimation during spraying.

2: Outer tube

51: large diameter hole

3: inner tube

4: Ontology

40: channel

41: around the wall

411: The first connection segment

412: The second connection segment

413: The third connection segment

414: Ring

415: channel

5: Nozzle

52: small diameter hole

53: abutment surface

54: Cone section

55: Leading section

6: Cover

60: ring chamber

7: airtight gasket

X: axis

L1: length

L2: Length

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a cross-sectional view illustrating a conventional nozzle device disclosed in U.S. Patent No. 20070164130; 2 is a sectional view illustrating an embodiment of the nozzle device of the present invention; Fig. 3 is a three-dimensional exploded view of the embodiment; Fig. 4 is a combined perspective view of the embodiment; Fig. 5 is along the line V-V in Fig. 2 A cross-sectional view taken; and FIG. 6 is a schematic cross-sectional view of the embodiment.

Referring to Fig. 2, Fig. 3 and Fig. 4, an embodiment of the nozzle device of the present invention is suitable for connecting an outer pipe 2 for conveying compressed gas and an inner pipe 3 for conveying carbon dioxide gas. 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 surrounding an axis X and defining a channel 40 . The minimum aperture of the channel 40 is greater than the maximum outer diameter of the inner tube 3, and is suitable for wearing Put this 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 is formed between the first connecting section 411 and the second connecting section 412 A ring edge 414 . The first connecting section 411 is sleeved on the outer tube 2 . The outer diameter of the second connecting section 412 >the outer diameter of the third connecting section 413 . The third connecting section 413 has a plurality of holes 415 extending in a direction perpendicular to the axis X and communicating with the channel 40 and the outside (as shown in FIG. 5 ). The rim 414 is adapted to bear against the outer tube 2 .

The nozzle 5 is sleeved on the third connecting section 413 of the body 4 and abuts against the ring 414 of the body 4 , and includes a large hole extending from one end surface along the axis direction to the other end surface and communicating with the channel 40 . A 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 face 52 of the adjacent small diameter hole, and connecting A guide section 55 adjacent to the end face 52 of the large-diameter hole. The large-diameter hole 51 is suitable for socketing the inner tube 3 . The small-diameter hole 52 is suitable for producing carbon dioxide particles due to phase change of passing carbon dioxide gas. The abutting surface 53 abuts against the inner tube 3 to prevent the inner tube 3 from moving due to the internal compressed air pressure. A length L1 of the guiding section 55 along the axis X is greater than a length L2 of the tapered surface section 54 along the axis X. And the outer diameter of the tapered surface section 54 gradually decreases from one end close to the main body 4 to the other end away from the main body 4 .

The outer cover 6 is connected to the second connection section 412 of the body 4 , and surrounds the guide section 55 and part of the cone section 54 of the nozzle 5 to define an annular chamber 60 communicating with the holes 415 . The outer cover 6 is tapered, and the outer diameter is far away from the end adjacent to the body 4 The other end away from the body 4 gradually decreases from large to small.

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 preventing the 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, it will undergo a phase change due to the pressure difference and generate particles, forming gaseous-solid coexisting carbon dioxide and carbon dioxide particles, and Carbon dioxide particles will roll larger and larger during the stroke of the small-diameter hole 52 .

Effect)挾帶外界氣流依循該錐面段54朝遠離該本體4之方向流動，而與二氧化碳氣體匯集成流速更快、推進力更強、指向性更準直的氣流，同時挾帶二氧化碳顆粒噴射至外界。藉此，在切削製程中，可以藉由噴幅面積較小的噴射氣流與二氧化碳顆粒，順利地將工件表面的粉屑帶走，達到冷卻、清潔的效果。 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, and under the condition of being blocked by the outer cover 6, form a nozzle following the nozzle. 5 of the guide section 55 and the airflow of the cone section 54, and after leaving the annular chamber 60, because of the Coanda effect (Coand

Effect) carries the external airflow along the cone section 54 to flow away from the main body 4, and merges with the carbon dioxide gas to form an airflow with faster flow velocity, stronger propulsion, and more collimated directionality, and simultaneously carries carbon dioxide particles to spray to the outside world. In this way, during the cutting process, the powder chips on the surface of the workpiece can be smoothly taken away by the small spray area of the jet air and carbon dioxide particles, achieving the effect of cooling and cleaning.

It is worth noting that the outer tube 2 is not limited to only conveying compressed gas. In other aspects of this embodiment, the outer tube 2 can also be inserted through an intermediate pipe (not shown) for delivering lubricant. Therefore, the lubricant of the intermediate pipe (not shown) will also follow the outer pipe 2 The compressed gas in the gas enters the annular chamber 60, and is mixed with the aforementioned gaseous-solid carbon dioxide and sprayed to the outside, thereby achieving a lubricating effect and improving the service life of the machining tool and the smoothness of the workpiece surface.

Since those skilled in the art can infer extended details based on the above description, no further description is given.

Through the above description, the advantages of the aforementioned 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 limit the air flow to only flow along the conical section 54, thereby greatly reducing the compression of overflow The gas can not only increase the flow velocity of the jet stream, but more 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 components can be enhanced and shaking can be reduced situation.

But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

2: Outer tube

3: inner tube

4: Ontology

40: channel

41: around the wall

411: The first connection segment

412: The second connection segment

51: large diameter hole

52: small diameter hole

53: abutment surface

54: Cone section

55: Leading segment

6: Cover

60: ring chamber

413: The third connection segment

414: Ring

415: channel

5: Nozzle

7: airtight gasket

X: axis

L1: length

L2: Length

Claims (10)

A nozzle device suitable for connecting an outer pipe for conveying compressed gas and an inner pipe for conveying carbon dioxide gas, the nozzle device comprising: a body connected to the outer pipe and including a surrounding pipe surrounding an axis and defining a channel A wall, the channel is suitable for passing through the inner tube, the surrounding wall has at least one hole that communicates with the channel and the outside; a nozzle is connected to the body, and includes an end surface extending from one end surface to the other end surface along the axis direction and A large-diameter hole and a small-diameter hole connected to the passage, a tapered section connecting the end surface of the adjacent small-diameter hole, and a guide section connecting the end surface of the adjacent large-diameter hole, the large-diameter hole suitable for socketing the inner tube, the small-diameter hole is suitable for producing carbon dioxide particles due to the phase change of passing carbon dioxide gas; and an outer cover, connected to the body, and surrounding the guide section and part of the cone section of the nozzle, And define an annular chamber connected to the at least one hole, when the compressed gas enters the annular chamber from the at least one hole, it will follow the flow of the cone section, and entrain the external air flow and carbon dioxide particles to spray against the direction of 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, and the first connecting section is sleeved on The outer tube, the second connection section is sleeved on the outer cover, the third connection section is sleeved on the nozzle, and has the at least one hole. The nozzle device according to claim 2, wherein the minimum diameter of the channel of the body is larger than the maximum outer diameter of the inner tube, and the outer diameter of the second connecting section is greater than the The outer diameter of the third connection segment. The nozzle device as claimed in claim 2, wherein the body further includes a ring formed between the first connecting section and the second connecting section, and the ring is adapted to abut against the outer tube. The nozzle device according to claim 2, further comprising an airtight gasket, which is arranged between the large-diameter hole of the nozzle and the second connecting section of the body, and is suitable for preventing the compressed gas in the channel of the body from entering The large diameter hole of the nozzle. According to the nozzle device as claimed in claim 2, the at least one channel of the second connecting section extends along a direction perpendicular to the axis. The nozzle device as claimed in claim 1, wherein the nozzle further includes an abutting surface defined between the large-diameter hole and the small-diameter hole, and the abutting surface abuts against the inner tube. The nozzle device as claimed in claim 7, wherein the length of the guide section of the nozzle along the axis direction is greater than the length of the cone surface 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 close to the body to the other end away from the body. The nozzle device as claimed in claim 1 or 9, wherein the outer cover is tapered, and the outer diameter gradually decreases from one end close to the body to the other end away from the body.

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