US20050217060A1 - Sootblower with single traveling limit switch utilizing state logic control - Google Patents
Sootblower with single traveling limit switch utilizing state logic control Download PDFInfo
- Publication number
- US20050217060A1 US20050217060A1 US10/812,807 US81280704A US2005217060A1 US 20050217060 A1 US20050217060 A1 US 20050217060A1 US 81280704 A US81280704 A US 81280704A US 2005217060 A1 US2005217060 A1 US 2005217060A1
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- US
- United States
- Prior art keywords
- control device
- switch control
- limit switch
- switch
- carriage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/04—Feeding and driving arrangements, e.g. power operation
- F28G15/06—Automatic reversing devices
Definitions
- the present invention relates to a sootblower and a method for controlling the same.
- Sootblowers are well known in the art for cleaning the inside surfaces of large scale boilers and other combustion devices.
- the combustion of fuels used to power industrial boilers creates soot, ash and slag that accumulate on the inner surfaces of the boiler.
- a sootblower is used to clean the inside surface of the boiler.
- One type of sootblower is the long retracting type, including the assignees long running “IK” series of sootblowers.
- retracting sootblowers include a tubular lance mounted to a movable carriage which moves along the frame of the sootblower.
- the lance tube fits over a fixed feed tube through which steam or other cleaning media is supplied as controlled by a poppet valve.
- the carriage moves forward to extend the tubular lance through a wall port in the boiler wall.
- the tubular lance includes nozzles to spray a cleaning medium such as steam to clean the inner surfaces of the boiler and remove the contamination.
- the cleaning cycle typically includes the extension and retraction of the lance tube into the boiler while the lance tube rotates, causing the cleaning jet to trace a helical pattern.
- an electric motor mounted to the sootblower carriage is used to drive the carriage to extend and retract the lance tube.
- two limit switches are mounted to the sootblower frame. The limit switches are positioned at the fully retracted and extended positions of the carriage. As the carriage moves forward, to extend the lance into the boiler, the forward limit switch is activated, reversing the direction of the motor. After the carriage has fully retracted, the carriage interacts with a second limit switch, stopping the motor's operation until another cleaning operation is initiated.
- the environment surrounding industrial boilers is extremely harsh. Temperatures around and near the boiler are extremely high. In addition, gasses which escape from the boiler are highly corrosive. Conventionally, limit switches, particularly limit switches located near the boiler will have become typically high maintenance components requiring frequent service.
- the present invention provides a system and method for controlling a retractable sootblower having a frame, a movable carriage, a limit switch mounted on the movable carriage, a first switch control device, and a second switch control device.
- the frame supports the movable carriage, allowing the movable carriage to move between an extended and retracted position.
- the limit switch is mounted on the carriage and configured to sense both the first switch control device and the second switch control device.
- the first switch control device is positioned such that the limit switch will sense the first switch control device when the carriage is in the extended position.
- the second switch control device is positioned such that the limit switch will sense the second switch control device when the carriage is in the retracted position.
- the sootblower also includes a motor for driving the movable carriage between the extended and retracted positions, and a controller electrically coupled to the limit switch and configured to reverse the motor travel in response to the limit switch sensing the first switch control device.
- the first and second switch control devices are mounted to the frame. Further, the first and second switch control devices have an adjustable position and may include a magnet as the limit switch may be a magnetic proximity switch.
- the limit switch should be mounted inside the frame and preferably mounted close to the carriage pinion shaft center line.
- a method for controlling the retractable sootblower includes initiating forward travel of the carriage, dispersing a cleaning medium from the lance tube, sensing the limit switch is proximate the first switch control device, reversing the direction of travel of the carriage, and sensing the limit switch is proximate to a second switch control device.
- the method may include the steps of first, setting a forward state after the limit switch is not proximate to a second switch control device. Second, reversing the direction of travel after sensing the limit switch is proximate to a second switch control device. Third, setting a reverse state after sensing the limit switch is not proximate to the first switch control device. Fourth, setting a rest state after sensing the limit switch is proximate to a second switch control device.
- FIG. 1 is a pictorial view of a sootblower in accordance with the present invention
- FIG. 2 is a schematic view of a control system of a sootblower, in accordance with the present invention.
- FIG. 3 is a block diagram of a method for controlling a sootblower, in accordance with the present invention.
- the sootblower 10 includes a frame 12 , a carriage assembly 18 , a lance tube 14 , and a motor 26 .
- the frame 12 is generally a rectangular shape and forms a housing for the entire unit.
- Carriage assembly 18 is guided along two pairs of tracks 20 , 22 located on the top and bottom of the frame 12 .
- the upper tracks 22 support a toothed rack 24 .
- the toothed rack 24 enable longitudinal movement of the carriage 18 .
- the motor 26 drives the gear box 28 of the carriage assembly 18 to extend and retract the lance tube 14 .
- the carriage 18 includes a pinion gear 30 which engages the toothed rack 24 to move the carriage 18 and lance tube 14 .
- the support rollers 34 are attached to the carriage 18 and engage the guide tracks 20 and 22 to support the carriage 18 .
- the motor 26 is preferably a three-phase motor allowing for the motor 26 to be driven in either rotational direction.
- a feed tube 16 is connected between the poppet valve 38 and the lance tube 14 .
- the feed tube 16 is supported by a bracket 36 and conducts the flow of cleaning medium from the poppet valve 38 to the lance tube 14 .
- the poppet valve 38 is actuated through linkages 40 which are engaged by the carriage assembly 18 to begin discharge of cleaning medium upon extension of the lance tube 14 . Further, the linkage 40 cuts off the flow of cleaning medium once the lance tube 14 and carriage 18 are retracted.
- the cleaning medium flows from the feed tube 16 through the lance tube 14 and exits the end of lance tube 14 through nozzles 42 .
- a front roller bracket assembly 44 supports the lance tube 14 as it is extended and retracted.
- the sootblower includes a limit switch 17 mounted to the carriage 18 .
- the limit switch 17 is proximate to a first switch control device 49 .
- the carriage 18 is positioned such that the limit switch 17 is proximate a second switch control device 48 .
- a determination can be made when to drive the motor 26 in a forward or reverse rotation.
- the limit switch 17 can be a proximity switch, such as, GO® switch manufactured by Top Worx, Louisville, Ky.
- the first and second switch control device 48 , 49 may be permanent magnets.
- the magnets may be placed directly on the frame or mounted to a bracket allowing adjustability of the first and second switch control devices 48 , 49 .
- the lance tube may become damaged or bent during operation. Therefore, it is preferable for the limit switch 17 to be mounted inside the frame 12 and particularly, mounted close to the center line of the carriage pinion shaft 32 , thereby reducing the possibility of limit switch misalignment or damage if the lance tube 14 is displaced or damaged.
- the control system includes a controller 50 , a control panel interface 54 , motor power 60 , a motor starter 52 , and sootblower components 58 .
- the controller 50 is a programmable controller, such as, the EASY 619ACRC manufactured by Moeller Electric Corporation, Franklin, Mass. Although, other controllers including programmable logic controllers (PLCs) may be used.
- the control panel interface 54 provides power signal 62 and a common signal 64 to power the controller 50 .
- the control panel interface 54 also includes an input device, shown as, a pushbutton 56 for initiating a cleaning cycle of the sootblower.
- the pushbutton 56 communicates with the controller 50 along lines 66 and 68 .
- Other devices may also be used to initiate a cleaning cycle including an automatic control system.
- the controller 50 communicates with the motor starter 52 to initiate forward rotation of the motor 26 as indicated by line 74 to extend the lance tube 14 .
- the controller 50 may communicate with the motor starter 52 as indicated along line 76 to drive the motor 26 in a reverse rotation causing retraction of the lance tube 14 .
- Motor power source 60 generally 460 volts AC three-phase, is provided to the motor starter 52 along line 72 .
- the motor starter 52 can change the motor rotation from forward to reverse by switching two of the three phases of the motor power.
- the control panel interface 54 also provides forward and reverse travel indication along line 70 from the motor starter 52 depending on which contactor is energized, forward or reverse.
- the motor starter 52 provides the motor power in the correct phase orientation for forward or reverse rotation to the motor 26 along line 78 .
- controller 50 receives input from the limit switch 17 along line 80 to determine when to drive the motor 26 in a forward or reverse rotation.
- the controller 50 is also available to control peripheral devices such as an optional pressure switch 88 or an optional blowing solenoid 82 to enhance the performance of the sootblower during the cleaning operation.
- a process is provided for controlling the forward and reverse rotation of the motor 26 to extend and retract the lance tube 14 during the cleaning operation.
- the control process begins at block 100 .
- the controller 50 sets a rest control state.
- the controller 50 determines if a start signal has been received, such as the pushbutton 56 being depressed. If the start signal is not received, the controller 50 continues to monitor for a start signal as indicated by line 108 . If a start signal has been received, the process follows line 106 and the controller 50 initiates forward travel of the carriage 18 and lance tube 14 as indicated by block 110 .
- the controller 50 monitors the limit switch 17 to determine if the limit switch 17 is not proximate to the second switch control device 48 . If the limit switch 17 is proximate to the second switch control device 48 , the controller 50 continues to monitor the limit switch 17 as indicated by line 116 . Alternatively, if the limit switch 17 is not proximate to the second switch control device 48 , the process follows line 114 and the controller 50 sets a forward control state as indicated by block 118 .
- the controller 50 monitors the limit switch 17 to determine if the limit switch 17 is proximate to the first switch control device 49 . If the limit switch 17 is not proximate to the first switch control device 49 , the controller 50 continues to monitor the limit switch 17 as indicated by line 124 . If the limit switch 17 is proximate to the first switch control device 49 , the process continues along line 122 and the controller 50 reverses the direction of travel of the motor 26 thereby retracting the carriage 18 and lance tube 14 , as indicated by block 126 .
- the controller 50 monitors the limit switch 17 to determine if the limit switch 17 is not proximate to the first switch control device 49 . If the limit switch 17 is proximate to the first switch control device 49 , the controller 50 continues to monitor the limit switch 17 as indicated by line 132 . Alternatively, if the limit switch 17 is not proximate to the first switch control device 49 , the process continues along line 130 and the controller 50 sets a reverse control state as indicated by block 134 .
- the controller 50 monitors the limit switch 17 to determine if the limit switch 17 is proximate to the second switch control device 48 . If the limit switch 17 is not proximate to the second switch control device 48 , the controller 50 continues to monitor the limit switch 17 as indicated by line 140 . Alternatively, if the limit switch 17 is proximate to the second switch control device 48 , the process follows along line 138 signifying the end of a cleaning operation and the controller 50 sets a rest control state as indicated by block 102 .
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a sootblower and a method for controlling the same.
- 2. Description of Related Art
- Sootblowers are well known in the art for cleaning the inside surfaces of large scale boilers and other combustion devices. The combustion of fuels used to power industrial boilers creates soot, ash and slag that accumulate on the inner surfaces of the boiler. As contaminants build on the inside surface of the boiler, the efficiency of the boiler decreases. Therefore, a sootblower is used to clean the inside surface of the boiler. One type of sootblower is the long retracting type, including the assignees long running “IK” series of sootblowers. Generally, retracting sootblowers include a tubular lance mounted to a movable carriage which moves along the frame of the sootblower. The lance tube fits over a fixed feed tube through which steam or other cleaning media is supplied as controlled by a poppet valve. The carriage moves forward to extend the tubular lance through a wall port in the boiler wall. The tubular lance includes nozzles to spray a cleaning medium such as steam to clean the inner surfaces of the boiler and remove the contamination. The cleaning cycle typically includes the extension and retraction of the lance tube into the boiler while the lance tube rotates, causing the cleaning jet to trace a helical pattern.
- Typically, an electric motor mounted to the sootblower carriage is used to drive the carriage to extend and retract the lance tube. To control the distance that the motor drives the carriage and to prevent the motor from stalling when the carriage reaches its physical travel limits, two limit switches are mounted to the sootblower frame. The limit switches are positioned at the fully retracted and extended positions of the carriage. As the carriage moves forward, to extend the lance into the boiler, the forward limit switch is activated, reversing the direction of the motor. After the carriage has fully retracted, the carriage interacts with a second limit switch, stopping the motor's operation until another cleaning operation is initiated. The environment surrounding industrial boilers is extremely harsh. Temperatures around and near the boiler are extremely high. In addition, gasses which escape from the boiler are highly corrosive. Conventionally, limit switches, particularly limit switches located near the boiler will have become typically high maintenance components requiring frequent service.
- In view of the above, it is apparent that there exists a need for an improved system for controlling the motion of a retracting type sootblower.
- In satisfying the above need, as well as overcoming the enumerated drawbacks and other limitations of the related art, the present invention provides a system and method for controlling a retractable sootblower having a frame, a movable carriage, a limit switch mounted on the movable carriage, a first switch control device, and a second switch control device. The frame supports the movable carriage, allowing the movable carriage to move between an extended and retracted position. The limit switch is mounted on the carriage and configured to sense both the first switch control device and the second switch control device. The first switch control device is positioned such that the limit switch will sense the first switch control device when the carriage is in the extended position. The second switch control device is positioned such that the limit switch will sense the second switch control device when the carriage is in the retracted position. The sootblower also includes a motor for driving the movable carriage between the extended and retracted positions, and a controller electrically coupled to the limit switch and configured to reverse the motor travel in response to the limit switch sensing the first switch control device.
- The first and second switch control devices are mounted to the frame. Further, the first and second switch control devices have an adjustable position and may include a magnet as the limit switch may be a magnetic proximity switch. The limit switch should be mounted inside the frame and preferably mounted close to the carriage pinion shaft center line.
- Further, a method for controlling the retractable sootblower is also provided. The method includes initiating forward travel of the carriage, dispersing a cleaning medium from the lance tube, sensing the limit switch is proximate the first switch control device, reversing the direction of travel of the carriage, and sensing the limit switch is proximate to a second switch control device. In addition, the method may include the steps of first, setting a forward state after the limit switch is not proximate to a second switch control device. Second, reversing the direction of travel after sensing the limit switch is proximate to a second switch control device. Third, setting a reverse state after sensing the limit switch is not proximate to the first switch control device. Fourth, setting a rest state after sensing the limit switch is proximate to a second switch control device.
- Further objects, features and advantages of this invention will become readily apparent to persons skilled in the art after a review of the following description, with reference to the drawings and claims that are appended to and form a part of this specification.
-
FIG. 1 is a pictorial view of a sootblower in accordance with the present invention; -
FIG. 2 is a schematic view of a control system of a sootblower, in accordance with the present invention; and, -
FIG. 3 is a block diagram of a method for controlling a sootblower, in accordance with the present invention. - Now referring to
FIG. 1 , a sootblower embodying the principles of the present invention is illustrated therein and designated at 10. As its primary components, thesootblower 10 includes aframe 12, acarriage assembly 18, alance tube 14, and amotor 26. Theframe 12 is generally a rectangular shape and forms a housing for the entire unit.Carriage assembly 18 is guided along two pairs oftracks frame 12. Theupper tracks 22 support atoothed rack 24. Thetoothed rack 24 enable longitudinal movement of thecarriage 18. Themotor 26 drives thegear box 28 of thecarriage assembly 18 to extend and retract thelance tube 14. Thecarriage 18 includes apinion gear 30 which engages thetoothed rack 24 to move thecarriage 18 andlance tube 14. Thesupport rollers 34 are attached to thecarriage 18 and engage theguide tracks carriage 18. Themotor 26 is preferably a three-phase motor allowing for themotor 26 to be driven in either rotational direction. - A
feed tube 16 is connected between thepoppet valve 38 and thelance tube 14. Thefeed tube 16 is supported by abracket 36 and conducts the flow of cleaning medium from thepoppet valve 38 to thelance tube 14. Thepoppet valve 38 is actuated throughlinkages 40 which are engaged by thecarriage assembly 18 to begin discharge of cleaning medium upon extension of thelance tube 14. Further, thelinkage 40 cuts off the flow of cleaning medium once thelance tube 14 andcarriage 18 are retracted. The cleaning medium flows from thefeed tube 16 through thelance tube 14 and exits the end oflance tube 14 throughnozzles 42. A frontroller bracket assembly 44 supports thelance tube 14 as it is extended and retracted. - The sootblower includes a
limit switch 17 mounted to thecarriage 18. When thecarriage 18 and thelance tube 14 are completely extended, thelimit switch 17 is proximate to a firstswitch control device 49. Alternatively, when the lance tube is fully retracted, thecarriage 18 is positioned such that thelimit switch 17 is proximate a secondswitch control device 48. Using signals from thelimit switch 17, a determination can be made when to drive themotor 26 in a forward or reverse rotation. Thelimit switch 17 can be a proximity switch, such as, GO® switch manufactured by Top Worx, Louisville, Ky. Using such a switch, the first and secondswitch control device switch control devices limit switch 17 to be mounted inside theframe 12 and particularly, mounted close to the center line of thecarriage pinion shaft 32, thereby reducing the possibility of limit switch misalignment or damage if thelance tube 14 is displaced or damaged. - Now referring to
FIG. 2 , the sootblower control system is provided in more detail. The control system includes acontroller 50, acontrol panel interface 54,motor power 60, amotor starter 52, andsootblower components 58. Thecontroller 50 is a programmable controller, such as, the EASY 619ACRC manufactured by Moeller Electric Corporation, Franklin, Mass. Although, other controllers including programmable logic controllers (PLCs) may be used. Thecontrol panel interface 54 providespower signal 62 and acommon signal 64 to power thecontroller 50. Thecontrol panel interface 54 also includes an input device, shown as, apushbutton 56 for initiating a cleaning cycle of the sootblower. Thepushbutton 56 communicates with thecontroller 50 alonglines - The
controller 50 communicates with themotor starter 52 to initiate forward rotation of themotor 26 as indicated byline 74 to extend thelance tube 14. Alternatively, thecontroller 50 may communicate with themotor starter 52 as indicated alongline 76 to drive themotor 26 in a reverse rotation causing retraction of thelance tube 14.Motor power source 60, generally 460 volts AC three-phase, is provided to themotor starter 52 alongline 72. Themotor starter 52 can change the motor rotation from forward to reverse by switching two of the three phases of the motor power. Thecontrol panel interface 54 also provides forward and reverse travel indication alongline 70 from themotor starter 52 depending on which contactor is energized, forward or reverse. Themotor starter 52 provides the motor power in the correct phase orientation for forward or reverse rotation to themotor 26 alongline 78. In addition, thecontroller 50 receives input from thelimit switch 17 alongline 80 to determine when to drive themotor 26 in a forward or reverse rotation. Thecontroller 50 is also available to control peripheral devices such as anoptional pressure switch 88 or anoptional blowing solenoid 82 to enhance the performance of the sootblower during the cleaning operation. - Now referring to
FIG. 3 , a process is provided for controlling the forward and reverse rotation of themotor 26 to extend and retract thelance tube 14 during the cleaning operation. The control process begins atblock 100. Inblock 102, thecontroller 50 sets a rest control state. Inblock 104, thecontroller 50 determines if a start signal has been received, such as thepushbutton 56 being depressed. If the start signal is not received, thecontroller 50 continues to monitor for a start signal as indicated byline 108. If a start signal has been received, the process followsline 106 and thecontroller 50 initiates forward travel of thecarriage 18 andlance tube 14 as indicated byblock 110. Inblock 112, thecontroller 50 monitors thelimit switch 17 to determine if thelimit switch 17 is not proximate to the secondswitch control device 48. If thelimit switch 17 is proximate to the secondswitch control device 48, thecontroller 50 continues to monitor thelimit switch 17 as indicated byline 116. Alternatively, if thelimit switch 17 is not proximate to the secondswitch control device 48, the process followsline 114 and thecontroller 50 sets a forward control state as indicated byblock 118. - In
block 120, thecontroller 50 monitors thelimit switch 17 to determine if thelimit switch 17 is proximate to the firstswitch control device 49. If thelimit switch 17 is not proximate to the firstswitch control device 49, thecontroller 50 continues to monitor thelimit switch 17 as indicated byline 124. If thelimit switch 17 is proximate to the firstswitch control device 49, the process continues alongline 122 and thecontroller 50 reverses the direction of travel of themotor 26 thereby retracting thecarriage 18 andlance tube 14, as indicated byblock 126. - In
block 128, thecontroller 50 monitors thelimit switch 17 to determine if thelimit switch 17 is not proximate to the firstswitch control device 49. If thelimit switch 17 is proximate to the firstswitch control device 49, thecontroller 50 continues to monitor thelimit switch 17 as indicated byline 132. Alternatively, if thelimit switch 17 is not proximate to the firstswitch control device 49, the process continues alongline 130 and thecontroller 50 sets a reverse control state as indicated byblock 134. - In
block 136, thecontroller 50 monitors thelimit switch 17 to determine if thelimit switch 17 is proximate to the secondswitch control device 48. If thelimit switch 17 is not proximate to the secondswitch control device 48, thecontroller 50 continues to monitor thelimit switch 17 as indicated byline 140. Alternatively, if thelimit switch 17 is proximate to the secondswitch control device 48, the process follows along line 138 signifying the end of a cleaning operation and thecontroller 50 sets a rest control state as indicated byblock 102. - As a person skilled in the art will readily appreciate, the above description is meant as an illustration of an implementation of the principles of this invention. This description is not intended to limit the scope or application of this invention in that the invention is susceptible to modification, variation and change, without departing from spirit of this invention, as defined in the following claims.
Claims (22)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/812,807 US20050217060A1 (en) | 2004-03-30 | 2004-03-30 | Sootblower with single traveling limit switch utilizing state logic control |
EP05004051A EP1582836A1 (en) | 2004-03-30 | 2005-02-24 | Sootblower with single traveling limit switch utilizing state logic controls |
CA002498487A CA2498487A1 (en) | 2004-03-30 | 2005-02-25 | Sootblower with single traveling limit switch utilizing state logic control |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/812,807 US20050217060A1 (en) | 2004-03-30 | 2004-03-30 | Sootblower with single traveling limit switch utilizing state logic control |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050217060A1 true US20050217060A1 (en) | 2005-10-06 |
Family
ID=34887686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/812,807 Abandoned US20050217060A1 (en) | 2004-03-30 | 2004-03-30 | Sootblower with single traveling limit switch utilizing state logic control |
Country Status (3)
Country | Link |
---|---|
US (1) | US20050217060A1 (en) |
EP (1) | EP1582836A1 (en) |
CA (1) | CA2498487A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11085686B2 (en) * | 2017-05-08 | 2021-08-10 | Thermo King Corporation | Methods and systems for preventing premature compressor failure from improper operation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU195873U1 (en) * | 2019-09-19 | 2020-02-07 | Акционерное общество «Концерн «Научно-производственное объединение «Аврора» | DEVICE FOR CLEANING SURFACES OF HEATING BOILER UNITS |
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US2668978A (en) * | 1951-02-07 | 1954-02-16 | Diamond Power Speciality | Retractable soot blower of the long-travel trolley supported type |
US2897532A (en) * | 1959-08-04 | Retractable soot blower of the long travel type | ||
US3439376A (en) * | 1965-09-09 | 1969-04-22 | Diamond Power Speciality | Long retracting soot blower |
US3585673A (en) * | 1965-09-09 | 1971-06-22 | Diamond Power Speciality | Long retracting soot blower with locking gear drive |
US3604050A (en) * | 1968-12-03 | 1971-09-14 | Diamond Power Speciality | Long retracting soot blower with shifting roller supports |
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US4229854A (en) * | 1978-10-06 | 1980-10-28 | The Babcock & Wilcox Company | Soot blower construction |
US4351082A (en) * | 1981-04-20 | 1982-09-28 | The Babcock & Wilcox Company | Oscillating soot blower mechanism |
US4387481A (en) * | 1981-02-17 | 1983-06-14 | White Consolidated Industries, Inc. | Soot blower |
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Publication number | Priority date | Publication date | Assignee | Title |
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US5271356A (en) * | 1992-10-01 | 1993-12-21 | The Babcock And Wilcox Company | Low profile sootblower nozzle |
US6782902B2 (en) * | 2000-01-12 | 2004-08-31 | Diamond Power International, Inc. | Sootblower lance tube for dual cleaning media |
-
2004
- 2004-03-30 US US10/812,807 patent/US20050217060A1/en not_active Abandoned
-
2005
- 2005-02-24 EP EP05004051A patent/EP1582836A1/en not_active Withdrawn
- 2005-02-25 CA CA002498487A patent/CA2498487A1/en not_active Abandoned
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US2897532A (en) * | 1959-08-04 | Retractable soot blower of the long travel type | ||
US2668978A (en) * | 1951-02-07 | 1954-02-16 | Diamond Power Speciality | Retractable soot blower of the long-travel trolley supported type |
US3439376A (en) * | 1965-09-09 | 1969-04-22 | Diamond Power Speciality | Long retracting soot blower |
US3585673A (en) * | 1965-09-09 | 1971-06-22 | Diamond Power Speciality | Long retracting soot blower with locking gear drive |
US3604050A (en) * | 1968-12-03 | 1971-09-14 | Diamond Power Speciality | Long retracting soot blower with shifting roller supports |
US3794051A (en) * | 1970-09-17 | 1974-02-26 | Hydro Vel Services Inc | Tube cleaning system |
US3786823A (en) * | 1971-07-19 | 1974-01-22 | R Wiley | Truck wash apparatus |
US4229854A (en) * | 1978-10-06 | 1980-10-28 | The Babcock & Wilcox Company | Soot blower construction |
US4387481A (en) * | 1981-02-17 | 1983-06-14 | White Consolidated Industries, Inc. | Soot blower |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11085686B2 (en) * | 2017-05-08 | 2021-08-10 | Thermo King Corporation | Methods and systems for preventing premature compressor failure from improper operation |
Also Published As
Publication number | Publication date |
---|---|
EP1582836A1 (en) | 2005-10-05 |
CA2498487A1 (en) | 2005-09-30 |
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