Water lance blower positioning system

• US 6,035,811 A
• Filed: 11/26/1997
• Issued: 03/14/2000
• Est. Priority Date: 05/30/1995
• Status: Expired due to Term

• Current Assignee: Clyde Industries Inc.
• Original Assignee: Clyde Bergemann GmbH (Clyde Bergemann Power Group, Inc.)
• Inventors: Simon, Stephan, Bude, Friedrich, Albers, Karl
• Primary Examiner(s): Wolberg, Teresa
• Assistant Examiner(s): Wilson, Gregory A.
• Application Number:
  US08/978,202
• Time in Patent Office: 839 Days
• Field of Search: 122/379, 122/390, 122/392, 122/405, 15/246.5
• US Class Current: 122/390
• CPC Class Codes: F23J 3/00 Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
• CPC Class Codes: F28G 3/16 using jets of fluid for removing debris
• CPC Class Codes: F28G 3/166 from external surfaces of heat exchange conduits

Abstract

A water lance blower for cleaning heating installations, wherein a water lance (6) is movably (5) arranged with its mouth on or in a hatch (2) and can blow a water jet through the heating installation, which is in operation and is flowed through with flames and/or smoke, onto wall areas (A-E) which can be reached from the hatch (2), wherein the water lance (6) is movable by at least one movement element (8.1, 8.2, 8.3) which is stationarily fixed at one end outside a vertical plane through the point of movement (5) of the water lance (6) to the heating installation and by the other end (7.1, 7.2, 7.3) to the water lance (6), wherein path sensors are provided for precise determination of the position of the water lance (6). Preferably three movement elements (8.1, 8.2, 8.3) are provided, the fixing points (9.1, 9.2, 9.3) of which each form in particular an angle of approximately 80° to 140° to the point of movement (5) of the water lance (6). Such water lance blowers can be installed even when there are unfavorable spatial conditions and perform any freely pre-determinable blowing patterns and speed profiles.

Claims

1. A water lance blower for cleaning a heating installation having wall areas and a hatch, wherein the heating installation is operational with flames and/or smoke flowing therethrough, said water lance blower comprising:

a water lance having a mouth, wherein the water lance is movably arranged with the mouth at the hatch for blowing a water jet through the heating installation onto the wall areas which can be reached from the hatch,

a water supply in fluid communication with said water lance;

at least one movement element, of said water lance, which is connected in a stationary manner at one end, outside a vertical plane through a point of movement of said water lance, to the heating installation and which is connected at another end to said water lance, wherein said at least one movement element moves said water lance about the point of movement; and

path sensors which determine a position of said water lance relative to a reference position of said water lance;

wherein said at least one movement element comprises at least two movement elements, wherein each movement element of said at least two movement elements is fixed at one end to an installation fixing point and is fixed at another end to the water lance at a water lance fixing point, wherein for each movement element an angle between the installation fixing point, the water lance fixing point and the point of movement of said water lance is between about 80° and

about 140°

wherein the vertex of the angle is at the water lance fixing point.

2. A water lance blower according to claim 1, further comprising at least one additional path sensor arm which has path sensors for determining an actual position of said water lance.

3. A water lance blower according to claim 1, wherein said at least one movement element and said path sensors are connected to a shared electronic control system which calculates a position of said water lance from the measured values of said path sensors and provides control commands to said at least one movement element, wherein pre-calculated courses of movement of said water lance are repeatable relative to a path of travel and speed.

4. A water lance blower according to claim 1, wherein said at least one movement element and said path sensors are connected to a shared electronic control system which calculates a position of said water lance from the measured values of said path sensors and provides control commands to said at least one movement element, wherein previously memorised courses of movement of said water lance are repeatable relative to a path of travel and speed.

5. A water lance blower according to claim 1, wherein said at least one movement element comprises a cylinder selected from a hydraulic lifting cylinder and a pneumatic lifting cylinder which is joined at one end to a fixed point on the heating installation and joined at another end to a part of said water lance outside the heating installation.

6. A water lance blower according to claim 1, wherein said at least one movement element comprises a drive, wherein said drive is a member selected from the group consisting of an electric drive and a magnetic drive.

7. A water lance blower according to claim 1, wherein said at least one movement element is a member selected from the group consisting of a lever, a cable pull, a chain, and a rotary joint.

8. A water lance blower according to claim 1, further comprising passive stabilising elements for reliable mounting of said water lance, wherein said passive stabilising elements are members selected from the group consisting of pressure and torsionally pre-stressed stabilising elements.

9. A water lance blower according to claim 1, wherein said path sensors are members selected from the group consisting of an angle and length sensors.

10. A water lance blower according to claim 1, further comprising at least one additional path sensor, wherein the at least one additional path sensor is in addition to an amount of path sensors necessary for determining the position of said water lance, in order to increase the precision of the positioning and availability.

11. A water lance blower for cleaning a heating installation having wall areas and a hatch, wherein the heating installation is operational with flames and/or smoke flowing therethrough, said water lance blower comprising:

a water lance having a mouth, wherein the water lance is movably arranged with the mouth at the hatch for blowing a water jet through the heating installation onto the wall areas which can be reached from the hatch,

a water supply in fluid communication with said water lance;

at least one movement element, of said water lance, which is connected in a stationary manner at one end, outside a vertical plane through a point of movement of said water lance, to the heating installation and which is connected at another end to said water lance, wherein said at least one movement element moves said water lance about the point of movement; and

path sensors which determine a position of said water lance, wherein the at least one movement element comprises said path sensors, and wherein said path sensors measure a parameter selected from length and angular position of said at least one movement element with respect to a reference position.

12. A method for operating a water lance blower for cleaning a heating installation having wall areas and a hatch, wherein the heating installation is operational with flames and/or smoke flowing therethrough, said method comprising:

arranging a water lance movably with a mouth at the hatch for blowing a water jet through the heating installation onto wall areas which can be reached from the hatch, wherein the water lance is movable to blow the water jet along pre-calculated lines of movement at pre-calculated speeds;

supplying water to the water lance; and

moving the water lance by at least one movement element which is connected at one end, outside a vertical plane through a point of movement of the water lance, to the heating installation, and connected at another end to the water lance, wherein said moving the water lance moves the water jet along pre-calculated lines of movement at pre-calculated speeds dependent upon position.

13. A method according to claim 12, further comprising determining a respective current position of the water lance relative to a reference position by sensors selected from length and angle sensors arranged on the at least one movement element and at least one separate path sensor arm, and further comprising consulting on-line for further control of the course of movement.

14. A method according to claim 12, further comprising measuring at least one more measured value of a path sensor than is necessary for determining the position, processing the at least one more measured value, and calculating an error compensation value to increase accuracy when a measuring sensor fails.

15. The method of claim 12 further comprising measuring the exact position of the water lance with respect to a reference position.

16. The method of claim 12 further comprising controlling a blowing pattern with a linked experimental measuring technology by means of jet geometry.

17. A method for operating a water lance blower for cleaning a heating installation having wall areas and a hatch, wherein the heating installation is operational with flames and/or smoke flowing therethrough, said method comprising:

arranging a water lance movably with a mouth at the hatch for blowing a water jet through the heating installation onto wall areas which can be reached from the hatch, wherein the water lance is movable to blow the water iet along previously memorised lines of movement at previously memorised speeds;

supplying water to the water lance; and

moving the water lance by at least one movement element which is connected at one end, outside a vertical plane through a point of movement of the water lance, to the heating installation, and connected at another end to the water lance, wherein said moving the water lance moves the water jet along previously memorised lines of movement at previously memorised speeds dependent upon position.

18. A method according to claim 17, further comprising determining a respective current position of the water lance relative to a reference position by sensors selected from length and angle sensors arranged on the at least one movement element and at least one separate path sensor arm, and further comprising consulting on-line for further control of the course of movement.

19. A method according to claim 17, further comprising measuring at least one more measured value of a path sensor than is necessary for determining the position, processing the at least one more measured value, and calculating an error compensation value to increase accuracy when a measuring sensor fails.

20. A method for operating a water lance blower for cleaning a heating installation having wall areas and a hatch, wherein the heating installation is operational with flames and/or smoke flowing therethrough, said method comprising:

arranging a water lance movably with a mouth at the hatch for blowing a water jet through the heating installation onto wall areas which can be reached from the hatch, wherein the water lance is movable to blow the water jet along pre-calculated lines of movement at previously memorised speeds;

supplying water to the water lance; and

moving the water lance by at least one movement element which is connected at one end, outside a vertical plane through a point of movement of the water lance, to the heating installation, and connected at another end to the water lance, wherein said moving the water lance moves the water jet along pre-calculated lines of movement at previously memorised speeds dependent upon position.

21. A method according to claim 20, further comprising determining a respective current position of the water lance relative to a reference position by sensors selected from length and angle sensors arranged on the at least one movement element and at least one separate path sensor arm, and further comprising consulting on-line for further control of the course of movement.

22. A method according to claim 20, further comprising measuring at least one more measured value of a path sensor than is necessary for determining the position, processing the at least one more measured value, and calculating an error compensation value to increase accuracy when a measuring sensor fails.