Abrasive head with clean gas infeed

Abstract

An abrasive head with clean gas infeed for cleaning/removing material surfaces and splitting/cutting materials by a liquid beam enriched with solid abrasive particles to extend the tool lifetime by eliminating damage to the liquid jet's aperture by the abrasive, avoid degrading the abrasive inside the tool and increase the cutting power and flow efficiency.

Claims

1. An abrasive head with clean gas infeed containing a liquid jet (21), a mixing chamber (22) equipped with at least one gas and abrasive mixture (94) infeed (28), connected to an abrasive jet (23) characterized by the fact that the liquid jet (21) leads into an infeed channel (25), which leads into the mixing chamber (22), and the liquid jet (21) and the abrasive jet (23) are lying in the common axis, while the infeed channel (25) is equipped with the clean gas (96) infeed (26) inclined at an angle of 10 to 90 against the common axis.

2. The abrasive head with clean gas infeed according to claim 1 characterized by the fact that the mixing chamber (22) contains at least two gas and abrasive mixture (94) infeeds (28).

3. The abrasive head with clean gas infeed according to claim 1 characterized by the fact that the infeed channel (25) is equipped with at least two clean gas (96) infeeds (26).

4. The abrasive head with clean gas infeed according to claim 1 characterized by the fact that the gas and abrasive mixture (94) infeed (28) inclines against the common axis at an angle of 10 to 90.

5. The abrasive head with clean gas infeed according to claim 1 characterized by the fact that the inner cross-section area of infeed channel (25) is smaller than the cylindrical part (75) of the abrasive jet (23).

Description

SUMMARY OF PRESENTED DRAWINGS

[0016] FIG. 1. Technology status. A tool without separate clean gas infeed 96.

[0017] FIG. 2. A tool with a separate clean air 96 infeed 26.

[0018] FIG. 3. An abrasive head according to example 1 with a single liquid jet clean gas 96 infeed 26 into infeed channel 25.

[0019] FIG. 4. An abrasive head according to example 2 with a single liquid jet and inclined clean gas 96 infeed 26 into the infeed channel 25.

[0020] FIG. 5. An abrasive head according to example 3 with a single liquid jet, inclined clean gas 96 infeed 26 into the infeed channel 25 and inclined infeed 28 of the gas and abrasive mixture 94.

[0021] FIG. 6. An abrasive head according to example 4 with a single liquid jet, two inclined clean gas 96 infeeds 26 into the infeed channel 25 and two inclined infeeds 28 of the gas and abrasive mixture 94.

EXAMPLES OF INVENTION EXECUTION

Example 1

[0022] Abrasive Head with Clean Gas Infeed into the Common Channel.

[0023] FIG. 3 shows a tool design with clean gas intake 96 through the infeed 26 leading into the infeed channel 25 downstream the water jet 21 located downstream the pressurized liquid infeed 73. The water jet 21 is connected to the infeed channel 25 into which the clean gas 96 infeed 26 leads. The tool main components, i.e. water jet 21, mixing chamber 22 and abrasive jet 23 are positioned in the tool axis 55, while the liquid jet 21 axis 56 is identical with the infeed channel axis 25 and the tool axis 55. The infeed channel 25 leads into the mixing chamber 22 together with one infeed 28 of the gas and abrasive mixture 94. The infeed channel inner cross-section 25 is smaller than the abrasive jet 23 cylindrical part's 75 inner cross-section. This results in the gas and abrasive mixture 94 being intaken the mixing chamber 22 through the infeed 28 of the gas and abrasive mixture 94 automatically, just like the clean gas 96 is automatically intaken through the clean gas 26 infeed 96. The gas and abrasive mixture 94 accelerated by the common high-speed liquid beam 95 enters the abrasive jet 23 connected to the mixing chamber 22. The abrasive jet 23 is positioned in the tool axis 55 at the tool's end. At this point, further acceleration of the described mixture occurs before impacting on the cut material.

[0024] The abrasive head bearing housing, where liquid jet body 21, mixing chamber housing 22 and abrasive jet body 23 are placed, contains infeed channel 25 downstream the water jet 21, clean gas 96 infeed 26 and the infeed 28 of the gas and abrasive mixture 94. It's made of 17-4PH steel. The mixing chamber housing 22 is made of hard metal. The abrasive jet's housing 23 is made of hard metal. Clean gas 96 infeed 26 made of 17022 steel is connected to the abrasive head's bearing housing. Gas and abrasive mixture 94 infeed 28 made of 17022 steel is connected to the abrasive head's bearing housing.

[0025] In case of a tool made according to example 1, there is no gas recirculation thanks to the presence of the clean gas 96 infeed 26 into the infeed channel 25. Thanks to the recirculation avoidance, the abrasive particles don't get near and don't harm the liquid jet 21 while avoiding their degradation here.

Example 2

[0026] An Abrasive Head with Inclined Clean Gas Infeed into the Infeed Channel.

[0027] FIG. 4 shows a tool design example with clean gas intake 96 through the infeed 26 leading into the common channel 25 under an angle of 55 to the tool axis 55 downstream after the water jet 21 installed after the pressurized liquid infeed 73. The water jet 21 is connected to the infeed channel 25 into which the clean gas 96 infeed 26 leads. The tool main components, i.e. water jet 21, mixing chamber 22 and abrasive jet 23 are positioned in the tool axis 55, while the liquid jet 21 axis 56 is identical with the infeed channel axis 25 and the tool axis 55. The infeed channel 25 leads into the mixing chamber 22 together with one infeed 28 of the gas and abrasive mixture 94. The infeed channel inner cross-section 25 is greater than the abrasive jet 23 cylindrical part's 75 inner cross-section. This results in the gas and abrasive mixture 94 being intaken the mixing chamber 22 through the infeed 28 of the gas and abrasive mixture 94 by overpressure, with the clean gas 96 being automatically intaken through the clean gas 96 infeed 26. The gas and abrasive mixture 94 accelerated by the common high-speed liquid beam 95 enters the abrasive jet 23 connected to the mixing chamber 22. The abrasive jet 23 is positioned in the tool axis 55 at the tool's end. At this point, further acceleration of the described mixture occurs before impacting on the cut material.

[0028] The abrasive head bearing housing, where liquid jet body 21 and abrasive jet body 22 are placed, contains infeed channel 25 downstream the water jet 21, mixing chamber 22 and the infeed 28 of the gas and abrasive mixture 94. It's made of 1.4057 abrasion-resistant steel. The abrasive jet's housing 23 is made of hard metal. Clean gas 96 infeed 26 made of 17346 steel is connected to the abrasive head's bearing housing. The gas and abrasive mixture 94 infeed 28 made of 17346 steel is connected to the abrasive head's bearing housing.

[0029] In case of a tool made according to example 2, there is no gas recirculation thanks to the presence of the clean gas 96 infeed 26 into the infeed channel 25. Thanks to the recirculation avoidance, the abrasive particles don't get near and don't harm the liquid jet 21 while avoiding their degradation here.

Example 3

[0030] An Abrasive Head with Inclined Gas and Abrasive Mixture Infeed and Inclined Clean Gas Infeed.

[0031] FIG. 5 shows a tool design example with clean gas intake 96 through the infeed 26 leading into the infeed channel 25 downstream the water jet 21 located downstream the pressurized liquid infeed 73. The water jet 21 is connected to the infeed channel 25 into which the clean gas 96 infeed 26 leads, inclined to the tool axis 55 by 60 downstream. The tool main components, i.e. water jet 21, mixing chamber 22 and abrasive jet 23 are positioned in the tool axis 55, while the liquid jet 21 axis 56 is identical with the infeed channel axis 25 and the tool axis 55. The infeed channel 25 leads into the mixing chamber 22 together with one infeed 28 of the gas and abrasive mixture 94 inclined to the tool axis 55 by 50 downstream. The infeed channel inner cross-section 25 is smaller than the abrasive jet 23 cylindrical part's 75 inner cross-section. This results in the gas and abrasive mixture 94 being intaken into the shaped mixing chamber 22 through the infeed 28 of the gas and abrasive mixture 94 automatically, just like the clean gas 96 is automatically intaken through the clean gas 26 infeed 96. The gas and abrasive mixture 94 accelerated by the common high-speed liquid beam 95 enters the abrasive jet 23 connected to the mixing chamber 22. The abrasive jet 23 is positioned in the tool axis 55 at the tool's end. At this point, further acceleration of the described mixture occurs before impacting on the cut material.

[0032] The abrasive head bearing housing, where liquid jet body 21, mixing chamber housing 22 and abrasive jet body 23 are placed, contains infeed channel 25 downstream the water jet 21, clean gas 96 infeed 26 and the infeed 28 of the gas and abrasive mixture 94. It's made of 17022 steel. The mixing chamber housing 22 is made of hard metal. The abrasive jet's housing 23 is made of hard metal. The liquid jet 21 is made of sapphire and the infeed channels 25 are made of PVC. Clean gas 96 infeed 26 made of 17022 steel is connected to the abrasive head's bearing housing. Gas and abrasive mixture 94 infeed 28 made of 17-4PH steel is connected to the abrasive head's bearing housing.

[0033] In case of a tool made according to example 3, there is no gas recirculation thanks to the presence of the clean gas 96 infeed 26 into the infeed channel 25. Thanks to the recirculation avoidance, the abrasive particles don't get near and don't harm the liquid jet 21 while avoiding their degradation here.

Example 4

[0034] An Abrasive Head with Two Inclined Gas and Abrasive Mixture Infeeds and Inclined Clean Gas Infeeds.

[0035] FIG. 6 shows a tool design example with clean gas intake 96 through the infeed 26 leading into the infeed channel 25 downstream the water jet 21 located downstream the pressurized liquid infeed 73. The water jet 21 is connected to the infeed channel 25 into which two clean gas 96 infeeds 26 leads, inclined to the tool axis 55 by 60 downstream. The tool main components, i.e. water jet 21, mixing chamber 22 and abrasive jet 23 are positioned in the tool axis 55, while the liquid jet 21 axis 56 is identical with the infeed channel axis 25 and the tool axis 55. The infeed channel 25 leads into the mixing chamber 22 together with two infeeds 28 of the gas and abrasive mixture 94 inclined to the tool axis 55 by 55 downstream. The gas and abrasive 94 mixture infeeds 28 are connected to the distributor of the gas and abrasive mixture 94. The infeed channel inner cross-section 25 is smaller than the abrasive jet 23 cylindrical part's 75 inner cross-section. This results in the gas and abrasive mixture 94 being intaken into the shaped mixing chamber 22 through the infeeds 28 of the gas and abrasive mixture 94 automatically, just like the clean gas 96 is automatically intaken through the clean gas 26 infeed 96. The gas and abrasive mixture 94 accelerated by the common high-speed liquid beam 95 enters the abrasive jet 23 connected to the mixing chamber 22. The abrasive jet 23 is positioned in the tool axis 55 at the tool's end. At this point, further acceleration of the described mixture occurs before impacting on the cut material.

[0036] The abrasive head bearing housing, where liquid jet body 21, mixing chamber housing 22 and abrasive jet body 23 are placed, contains infeed channel 25 downstream the water jet 21, clean gas 96 infeed 26 and the infeed 28 of the gas and abrasive mixture 94. It's made of 17022 steel. The mixing chamber housing 22 is made of hard metal. The abrasive jet's housing 23 is made of hard metal. The liquid jet 21 is made of sapphire and the infeed channels 25 are made of PVC. Clean gas 96 infeed 26 made of 17022 steel is connected to the abrasive head's bearing housing. Gas and abrasive mixture 94 infeed 28 made of 17-4PH steel is connected to the abrasive head's bearing housing.

[0037] In case of a tool made according to example 4, there is no gas recirculation thanks to the presence of the clean gas 96 infeed 26 into the infeed channel 25. Thanks to the recirculation avoidance, the abrasive particles don't get near and don't harm the liquid jet 21 while avoiding their degradation here.

LIST REFERENCE MARKS

[0038] 21liquid jet [0039] 22mixing chamber [0040] 23abrasive jet [0041] 25infeed channel [0042] 26clean gas infeeds 96 [0043] 28infeeds of gas and abrasive mixture 94 [0044] 55tool axis [0045] 56liquid jet axis 21 [0046] 73pressurized liquid infeed [0047] 75abrasive jet cylindrical section 23 [0048] 94gas and abrasive mixture [0049] 95liquid beam [0050] 96clean gas

APPLICABILITY IN INDUSTRY

[0051] Cleaning materials, removing material surfaces, splitting or cutting materials by liquid beam enriched with abrasive solid particles.