TW202120193A - Nozzle device including a body, a nozzle and an outer cover - Google Patents

Abstract

A nozzle device which includes a body connected to an outer tube, a nozzle connected to the body, and an outer cover connected to the body and surrounding a portion of the nozzle and defining an annular chamber. The body includes a surrounding wall defining a passage. The passage is suitable for inserting an inner tube. The surrounding wall has a hole communicating with the passage and the exterior. The nozzle includes a large diameter hole and a small diameter hole communicating with the passage, a tapered section connected to an end surface adjacent to the small-diameter hole, and a guiding section connected to an end surface adjacent to the large-diameter hole. The large diameter hole is sleeved with the inner tube. The small diameter hole is used to generate particles due to phase changes of passing carbon dioxide gas. When compressed gas enters the annular chamber through the passage, it will flow along the tapered section, and be ejected forward along with external airflow and particles. As a result, the annular chamber restricts the airflow to flow only along the tapered section, which not only increases the flow rate, but also improves the collimation during ejection.

Description

Nozzle device

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

Referring to FIG. 1, a conventional nozzle device 1 disclosed in US Patent No. 20070164130 is illustrated, which mainly includes a main body 11 and a nozzle 12 connected to the main body 11. The body 11 has an axial hole 111 for the passage of compressed gas, and an annular chamber 112 communicating with the axial hole 111 and the outside. The nozzle 12 is used to spray carbon dioxide particles. Thereby, when the compressed gas is injected from the axial hole 111 to the outside through the annular chamber 112, the outside airflow and carbon dioxide particles will be entrained and injected forward due to the Coandă Effect, thereby increasing the flow rate and generating more changes. Good spray effect.

However, because the annular chamber 112 has multiple transitions, the compressed gas will reduce the gas pressure due to the transitions when the compressed gas is discharged to the outside world. What is important is that after the compressed gas is discharged to the outside world, some of the gas will flow along. It flows along the outer surface of the nozzle 12, but another part of the gas will escape to the outside when it leaves the main body 11, 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 that can increase the flow rate and improve the collimation of the jet.

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. 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 passage, the passage is suitable for penetrating the inner tube, and the surrounding wall has at least one hole communicating with the passage and 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 Section, and a guide section connecting the end surface of the adjacent 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 the phase change .

The outer cover is connected to the body and surrounds the guide section and part of the cone section of the nozzle to define an annulus communicating with the at least one orifice. When compressed gas enters the annulus through the at least one orifice, it will Follow the cone surface section to flow, and entrain the external air flow and the carbon dioxide particles to spray in the opposite direction of the body.

The effect of the present invention is that the annular chamber restricts the airflow to flow only along the conical surface section, which can not only increase the flow rate, but also improve the collimation during spraying.

Referring to FIGS. 2, 3 and 4, an embodiment of the nozzle device of the present invention is suitable for connecting an outer tube 2 for conveying compressed gas and an inner tube 3 for conveying carbon dioxide gas. The nozzle device includes a body 4, a nozzle 5, an outer cover 6, and an airtight gasket 7.

The body 4 includes a surrounding wall 41 surrounding an axis X and defining a passage 40. The minimum aperture of the channel 40 is larger than the maximum outer diameter of the inner tube 3 and is suitable for penetrating 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 is formed between the first connecting section 411 and the second connecting section 412的一环边414。 的一环边414. The first connecting section 411 is sleeved on the outer tube 2. The outer diameter of the second connecting section 412 is greater than 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 passage 40 and the outside (as shown in FIG. 5). The ring 414 is adapted to abut against 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 surface section 54 connecting the end surface 52 of the adjacent small diameter hole, and the connection A guide section 55 adjacent to the end surface 52 of the large-diameter hole. The large-diameter hole 51 is suitable for socketing the inner tube 3. The small-diameter holes 52 are suitable for allowing the passing carbon dioxide gas to generate carbon dioxide particles due to a phase change. 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. The length L1 of the guiding section 55 along the axis X direction is greater than the length L2 of the tapered surface section 54 along the axis X direction. And the outer diameter of the tapered surface section 54 gradually decreases from one end adjacent to the main body 4 toward the other end away from the main body 4.

The outer cover 6 is connected to the second connecting section 412 of the main 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 channels 415. The outer cover 6 is tapered, and its outer diameter increases from one end adjacent to the main body 4 to the other end away from the main body 4 gradually decreasing.

The airtight 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 the compressed gas in the passage 40 of the body 4 from entering the large diameter hole 51 of the nozzle 5.

Referring to Figures 5 and 6, when carbon dioxide gas flows through the inner tube 3 toward the small diameter hole 52 of the nozzle 5, the 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 roll larger and larger in the stroke of the small diameter hole 52.

When the compressed gas enters the passage 40 of the body 4 through the outer tube 2, the compressed gas will enter the annular chamber 60 through the passages 415 from the passage 40, and when it is blocked by the outer cover 6, it will follow the nozzle The air flow of the guide section 55 and the tapered section 54 of 5, and after leaving the annular chamber 60, the external air flow entrained by the Coandă Effect follows the tapered section 54 in a direction away from the body 4 Flow, and merge with carbon dioxide gas into a gas flow with faster flow rate, stronger propulsion, more directivity, and at the same time entrain carbon dioxide particles to be ejected to the outside. In this way, in the cutting process, the jet air stream and carbon dioxide particles with a smaller spray area can be used to smoothly take away 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 only conveying compressed gas. In other aspects of this embodiment, the outer tube 2 may also be inserted 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 with the compressed gas in the outer pipe 2, and be mixed with the aforementioned gaseous-solid carbon dioxide and sprayed to the outside, thereby achieving a lubricating effect. Improve the life of the machining tool and the smoothness of the workpiece surface.

Since those with ordinary knowledge in this field can deduce the details of the expansion based on the above description, no further description is given.

Based on 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 part, the present invention can use the outer cover 6 and its annulus 60 to restrict the airflow to flow only along the conical section 54 so as to greatly reduce the compression of overflow The gas can not only increase the flow velocity of the jet flow, but more importantly, it can improve the collimation during jetting 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 enhanced and the shaking can be reduced Situation.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to 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: second connection segment 413: third connection segment 414: Ring 415: Hole 5: Nozzle 51: Large diameter hole 52: Small diameter hole 53: abutment surface 54: Cone section 55: Guiding section 6: Outer cover 60: ring room 7: Airtight gasket X: axis L1: length L2: length

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

412: second connection segment

51: Large diameter hole

52: Small diameter hole

53: abutment surface

54: Cone section

55: Guiding section

6: Outer cover

60: ring room

413: third connection segment

414: Ring

415: Hole

5: Nozzle

7: Airtight gasket

X: axis

L1: length

L2: length

Claims (10)

A nozzle device is suitable for connecting an outer tube for conveying compressed gas and an inner tube for conveying carbon dioxide gas. The nozzle device includes: A body connected to the outer tube and including a surrounding wall surrounding an axis and defining a passage, the passage is suitable for passing through the inner tube, and the surrounding wall has at least one hole communicating with the passage and the outside; A 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 cone connecting the end surface of the adjacent small-diameter hole A surface section and a guide section connecting the end surface of the adjacent 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 due to the phase change Particles; and An outer cover is connected to the body and surrounds the guide section and part of the cone section of the nozzle to define an annulus communicating with the at least one orifice. When compressed gas enters the annulus through the at least one orifice, It will follow the conical section to flow, and entrain the external air flow and the carbon dioxide particles to be injected in the opposite 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 axial direction, and the first connecting section is sleeved on The outer tube, the second connecting section is sleeved on the outer cover, and 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 hole diameter of the channel of the body is greater than the maximum outer diameter of the inner tube, and the outer diameter of the second connecting section is greater than the outer diameter of the third connecting section. The nozzle device according to claim 2, wherein the body further includes a ring formed between the first connecting section and the second connecting section, and the ring is suitable for abutting against the outer tube. The nozzle device according to claim 2, further comprising an air-tight gasket disposed between the large-diameter hole of the nozzle and the second connecting section of the body, and is suitable for blocking the compressed gas in the passage of the body from entering The large diameter hole of the nozzle. According to the nozzle device according to claim 2, the at least one perforation of the second connecting section extends in a direction perpendicular to the axis. The nozzle device according to 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 according to claim 7, wherein the length of the guide section of the nozzle along the axis direction is greater than the length of the tapered surface section along the axis direction. The nozzle device according to claim 1, wherein the outer diameter of the cone section of the nozzle increases from one end adjacent to the main body to the other end away from the main body. The nozzle device according to claim 1 or 9, wherein the outer cover has a tapered shape, and the outer diameter thereof increases from one end adjacent to the main body toward the other end away from the main body.

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