Shock wave soot blower with rotatable nozzle

Abstract

The utility model relates to the technical field of boiler soot cleaning, in particular to a shock wave soot blower with a rotatable nozzle, which comprises a shock wave generator, a nozzle, a spray pipe connected between the shock wave generator and the nozzle, a rotation driving device, a rotating shaft connected between the rotation driving device and the nozzle, a detection device and a control panel. The detection device comprises a detection head and an angle sensor, the detection head is arranged on the rotating shaft, and the angle sensor right faces the detection head and is used for detecting the rotating angle of the detection head along with the rotating shaft in real time. By arranging the nozzle, the rotating shaft, the rotation driving device and the detection device, the spraying angle of the nozzle is accurately controlled, the nozzle does not stay or conduct spraying at an invalid soot blowing point position, fixed-point accurate spraying of the nozzle is achieved, and the nozzle automatically returns to the original position after soot blowing is finished; the shock wave soot blower solves the problems that a shock wave soot blower in the prior art wastes compressed air, blows soot in a disordered rotating mode and causes soot deposition of a nozzle due to the fact that the nozzle does not return to the original position after soot blowing is finished.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler soot cleaning, in particular to a shock wave soot blower with a rotatable nozzle. Background Art

[0002] During long-term use, the heating surface of the boiler will accumulate a lot of dust particles, which will increase the exhaust temperature at the tail of the boiler and reduce the thermal efficiency of the boiler. At present, most rotary shock wave soot blower products can rotate 360 ​​degrees, but some spray directions cannot blow the heating surface of the boiler at all, wasting compressed air, and the nozzle angle cannot be controlled when the soot blowing point is started. At present, most products in the shock wave soot blowing industry have a single rotation angle of 30°, that is, one rotation needs to be rotated 12 times, and all 12 points are sprayed, such as Figure 7 As shown in the figure, point 1 is the starting point of the spraying. The nozzle rotates 30° each time, and rotates 12 times in total to spray 12 points. When spraying at points 3, 4, 5, 9, 10, and 11, the heating surface cannot be reached, and only the furnace walls on both sides are sprayed. Even if sprayed, the heating surface of the boiler cannot be swept, which wastes compressed air. Therefore, points 3, 4, 5, 9, 10, and 11 are invalid spraying points. In addition, Figure 8 Taking the example shown in the figure, the flow direction of the boiler flue gas is from top to bottom, and the starting position of the soot blowing nozzle is vertically downward, which can effectively prevent the dust in the boiler flue gas from falling into the nozzle. However, due to the design problem of the drive device of the existing rotary shock wave soot blower, the single rotation angle of the nozzle is inaccurate and the error is large, resulting in disordered subsequent soot blowing and waste of compressed air. In addition, the nozzle cannot return to the starting position after rotating one circle, and the dust in the boiler flue gas is easy to fall into the nozzle, causing dust accumulation in the nozzle and affecting the soot blowing effect. Utility Model Content

[0003] The utility model aims to provide a shock wave soot blower with a rotatable nozzle to solve the problems of waste of compressed air, disordered rotation soot blowing and nozzle dust accumulation caused by nozzle not returning to its original position after soot blowing in the prior art shock wave soot blower.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a shock wave soot blower with a rotatable nozzle, including a shock wave generator, a nozzle and a nozzle pipe connected between the shock wave generator and the nozzle, a rotating shaft, a rotating drive device, a detection device and a control panel, one end of the rotating shaft extends into the interior of the nozzle and is connected to the nozzle, and the other end of the rotating shaft is connected to the rotating drive device. The rotating drive device includes a driving mechanism and a transmission mechanism arranged between the rotating shaft and the driving mechanism. The detection device includes a detection head and an angle sensor. The detection head is arranged at the other end of the rotating shaft away from the nozzle, and the angle sensor is opposite to the detection head, which is used for real-time detection of the angle of the detection head rotating with the rotating shaft. The control panel includes a touch screen and a PLC controller, and the angle sensor and the driving mechanism are connected to the PLC controller.

[0005] On the basis of the above technical solution, the utility model can also be improved as follows:

[0006] As a further improvement of the above technical solution, the nozzle includes a nozzle body, an air inlet end and an air outlet end arranged at both ends of the nozzle body, the air inlet end is connected to one side of the shock wave generator by welding, the nozzle body and the air outlet end are arranged horizontally, and the air outlet end passes through the furnace wall, and the nozzle is rotatably connected to the opening of the air outlet end.

[0007] As a further improvement of the above technical solution, the air inlet end is bent relative to the nozzle body so that the air inlet end is perpendicular to the air outlet end, and an arc-shaped bending portion is formed between the air inlet end and the nozzle body. A branch pipe is provided at the bending portion, and the branch pipe is horizontally arranged and connected to the nozzle body. A flange is provided at one end of the branch pipe away from the nozzle body; the rotating shaft horizontally penetrates the flange, the branch pipe and the nozzle body in sequence, one end of the rotating shaft is connected to the nozzle through a connecting plate, and the other end of the rotating shaft penetrates the flange and is connected to the rotation drive device.

[0008] As a further improvement of the above technical solution, the connecting plate is arranged at the opening of the air outlet end, and the connecting plate is a circular iron plate or a stainless steel plate. The edge of the connecting plate is tightly fitted with the inner wall of the air outlet end of the nozzle. The nozzle is connected to the edge of one side of the connecting plate by welding, and the center of the other side of the connecting plate is connected to one end of the rotating shaft. The connecting plate is provided with a plurality of through holes surrounding the rotating shaft. The nozzle is connected to the nozzle by arranging through holes on the connecting plate, and the nozzle orifice of the nozzle is inclined relative to the nozzle.

[0009] As a further improvement of the above technical solution, the driving mechanism is a cylinder, the transmission mechanism includes a connecting rod and an annular connecting portion connected and fixed to one end of the connecting rod, the connecting portion is sleeved and fixed on the other end of the rotating shaft away from the nozzle, and a telescopic rod is provided at one end of the cylinder, and the telescopic rod is hinged to the other end of the connecting rod.

[0010] As a further improvement of the above technical solution, the angle sensor is fixed to the flange through a fixing rod, and the other side opposite to the shock wave generator is connected to an intake valve group through a pipeline, and the intake valve group includes a ball valve, a filter and an intake solenoid valve, and the distances between the ball valve, the filter and the intake solenoid valve and the shock wave generator are arranged in sequence from far to near, and the intake valve group is connected to a PLC controller.

[0011] As a further improvement of the above technical solution, the driving mechanism is a motor, and the motor is a stepper motor or a servo motor.

[0012] The beneficial effects of the utility model are as follows: the shock wave soot blower with a rotatable nozzle provided by the utility model can accurately control the injection angle of the nozzle by setting a nozzle, a rotating shaft connected to the nozzle, a rotating drive device connected to the rotating shaft and a detection device for detecting the rotation angle of the rotating shaft. The nozzle does not stop or spray at an invalid soot blowing point, thereby achieving precise fixed-point spraying of the nozzle and obtaining a better boiler soot blowing effect. After the soot blowing is completed, the nozzle automatically returns to the initial position to prevent dust accumulation on the nozzle, thereby solving the problems of waste of compressed air, disordered rotating soot blowing and dust accumulation on the nozzle caused by the nozzle not returning to its position after soot blowing in the shock wave soot blower of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of a shock wave soot blower with a rotatable nozzle provided in a preferred embodiment of the utility model;

[0015] Figure 2 yes Figure 1 Schematic diagram of the connection between the nozzle and the rotating shaft;

[0016] Figure 3 yes Figure 2 A schematic cross-sectional view of the connecting plate in FIG.

[0017] Figure 4 yes Figure 1 Schematic diagram of the state of the rotating drive device in the embodiment, at which time the telescopic rod of the cylinder is in an extended state;

[0018] Figure 5 yes Figure 1 A schematic diagram of the state of the rotating drive device in FIG. 1 , wherein the telescopic rod of the cylinder is in a retracted state;

[0019] Figure 6 yes Figure 1 A magnified view of part A;

[0020] Figure 7 It is a schematic diagram of the soot blowing points of the shock wave soot blower in the prior art;

[0021] Figure 8 It is a schematic diagram of the flow direction of boiler flue gas and soot blowing nozzles in the prior art;

[0022] In the figure: 1. shock wave generator; 2. nozzle; 20. nozzle body; 21. air inlet end; 22. air outlet end; 23. branch pipe; 24. flange; 25. bending part; 3. nozzle; 31. connecting plate; 310. through hole; 4. rotating shaft; 5. furnace wall; 6. rotating drive device; 61. cylinder; 611. telescopic rod; 62. connecting rod; 63. connecting part; 71. detection head; 72. angle sensor; 73. fixing rod; 8. control panel; 81. touch screen; 91. ball valve; 92. filter; 93. air intake solenoid valve. DETAILED DESCRIPTION

[0023] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] like Figures 1 to 6 As shown, a preferred embodiment of the utility model provides a shock wave soot blower with a rotatable nozzle, including a shock wave generator 1, a nozzle 3, a nozzle 2, a rotating shaft 4, a rotation drive device 6, a detection device and a control panel 8.

[0027] The nozzle 2 is connected between the shock wave generator 1 and the nozzle 3. The nozzle 2 includes a nozzle body 20, an air inlet end 21 and an air outlet end 22 arranged at both ends of the nozzle body 20. The air inlet end 21 is connected to one side of the shock wave generator 1 by welding. The opening of the air inlet end 21 is connected to the side wall of the shock wave generator 1 and is connected to the inside of the shock wave generator 1. The nozzle body 20 and the air outlet end 22 are arranged horizontally, and the air outlet end 22 passes through the furnace wall 5. The nozzle 3 is rotatably connected to the opening of the air outlet end 22.

[0028] The air inlet end 21 is bent relative to the nozzle body 20 so that the air inlet end 21 is perpendicular to the air outlet end 22. An arc-shaped bending portion 25 is formed between the air inlet end 21 and the nozzle body 20. The bending portion 25 extends in an arc shape and can be used to reduce the resistance of the gas flowing in the nozzle 2, so that the gas flows smoothly in the nozzle 2. A branch pipe 23 is provided at the bending portion 25. The branch pipe 23 is horizontally arranged and connected to the nozzle body 20. A flange 24 is provided at one end of the branch pipe 23 away from the nozzle body 20.

[0029] The rotating shaft 4 horizontally penetrates the flange 24, the branch pipe 23 and the nozzle body 20 from right to left in sequence. One end of the rotating shaft 4 is connected to the nozzle 3 through the connecting plate 31, and the other end of the rotating shaft 4 penetrates the flange 24 and is connected to the rotating driving device 6. The rotating shaft 4 is driven to rotate by the rotating driving device 6, thereby driving the nozzle 3 to rotate.

[0030] The connecting plate 31 is arranged at the opening of the air outlet end 22. The connecting plate 31 can be a round iron plate or a stainless steel plate. The edge of the connecting plate 31 is tightly fitted with the inner wall of the air outlet end 22 of the nozzle 2. A rubber ring can be set at the edge of the connecting plate 31 to provide a better sealing effect to prevent the compressed air from escaping. The nozzle 3 is connected to the edge of one side of the connecting plate 31 by welding. The center of the other side of the connecting plate 31 is connected to one end of the rotating shaft 4. The connecting plate 31 is provided with a plurality of through holes 310 surrounding the rotating shaft 4 for passing compressed air. The nozzle 3 is connected to the nozzle 2 by providing the through holes 310 on the connecting plate 31. The nozzle of the nozzle 3 is inclined relative to the nozzle 2, so that the compressed air ejected from the nozzle is sprayed in different directions as the nozzle 3 rotates.

[0031] The rotation drive device 6 includes a driving mechanism and a transmission mechanism disposed between the rotating shaft 4 and the driving mechanism. The driving mechanism is used to drive the rotating shaft 4 to rotate at a predetermined angle, and the transmission mechanism is used to transmit the power output by the driving mechanism to the rotating shaft 4. The driving mechanism can use existing motors, cylinders and other driving components. The motor can use a stepping motor or a servo motor. The transmission mechanism can use existing gears, belts, connecting rods and other transmission components. A reduction box can be disposed between the motor and the transmission mechanism. The control panel 8 includes a touch screen 81 and a PLC controller. The touch screen 81 is used to set working parameters and display the position of the nozzle 3 and the working status of the driving mechanism and other components. The driving mechanism is connected to the PLC controller, and the working status of the driving mechanism is controlled by the PLC controller.

[0032] In this embodiment, the driving mechanism is a cylinder 61, and the transmission mechanism includes a connecting rod 62 and an annular connecting portion 63 connected and fixed to one end of the connecting rod 62. The connecting portion 63 is sleeved and fixed on the other end of the rotating shaft 4 away from the nozzle 3. A telescopic rod 611 is provided at one end of the cylinder 61, and the telescopic rod 611 is hinged to the other end of the connecting rod 62. When the cylinder 61 is working, the connecting rod 62 and the connecting portion 63 are driven to rotate by the repeated extension and retraction of the telescopic rod 611, thereby driving the rotating shaft 4 to rotate, and the rotation of the rotating shaft 4 drives the nozzle 3 to rotate; the cylinder 61 is connected to a pneumatic mechanism that drives the cylinder 61 to move, and the pneumatic mechanism includes an inlet and exhaust pipe and an electromagnetic switch connected to the cylinder 61. The angle change of the rotating shaft 4 and the nozzle 3 is determined by the stroke change of the cylinder 61, and the stroke change of the cylinder 61 depends on the air pressure, the exhaust volume and the frequency of opening and closing of the electromagnetic switch. Figure 4 The telescopic rod 611 of the cylinder 61 is in an extended state. Figure 5 The telescopic rod 611 of the cylinder 61 is shown in a retracted state.

[0033] The detection device includes a detection head 71 and an angle sensor 72. The detection head 71 is arranged at the other end of the rotating shaft 4 away from the nozzle 3. The angle sensor 72 is connected and fixed to the flange 24 through a fixing rod 73, and the angle sensor 72 is directly opposite to the detection head 71. The angle sensor 72 is connected to the PLC controller. The angle sensor 72 detects the angle of the detection head 71 rotating with the rotating shaft 4 in real time, and sends the detected angle signal to the PLC controller. The PLC controller controls the action of the driving mechanism according to the received angle signal to accurately locate the rotation angle of the rotating shaft 4, so that the rotating shaft 4 is in a precise position, and the nozzle 3 can be precisely sprayed at a fixed point. Figure 6 As shown, one side of the detection head 71 is flattened, and the initial position of the nozzle 3 corresponds to that the flattened side of the detection head 71 faces the angle sensor 72 .

[0034] Preferably, the other side opposite to the shock wave generator 1 is connected to an intake valve group through a pipeline, and the intake valve group includes a ball valve 91, a filter 92 and an intake solenoid valve 93. The distances between the ball valve 91, the filter 92 and the intake solenoid valve 93 and the shock wave generator 1 are arranged in sequence from far to near, and the intake valve group is connected to the PLC controller.

[0035] The shock wave soot blower provided by the utility model can be applied to air shock wave soot blowers and acetylene deflagration shock wave soot blowers. When in use, the shock wave blowing frequency is set on the control panel 8, and the compressed air enters the shock wave generator 1 through the air inlet valve group. The compressed air accumulates in the shock wave generator 1, and then is released and ejected from the nozzle 3 through the nozzle 2 instantaneously. The instantaneous pressure relief release technology is adopted, and the energy of the instantaneous supersonic fluid shock wave is utilized to remove the accumulated ash on the boiler. When spraying ash, the angle sensor 72 first detects the initial position of the nozzle 3. At this time, the flattened side of the detection head 71 is facing the angle sensor 72; the PLC controller sends an electrical signal to the driving mechanism, and the driving mechanism drives the rotating shaft 4 to rotate. The rotation frequency of the rotating shaft 4 is consistent with the shock wave blowing frequency, so that the nozzle 3 rotates 45 degrees with each impact pulse, and eight pulses just make the nozzle 3 rotate one circle, and return to the initial position after rotating one circle. The angle sensor 72 detects the angle of rotation of the detection head 71 with the rotating shaft 4 in real time, and sends the detected angle signal to the PLC controller. The PLC controller then controls the driving mechanism to drive the rotating shaft 4 to rotate according to the received angle signal to accurately locate the rotation angle of the rotating shaft 4, so that the rotating shaft 4 is in a precise position, and the injection angle of the nozzle 3 is accurately controlled. The nozzle 3 does not stop or spray at an invalid sootblowing point, thereby achieving fixed-point precise spraying of the nozzle 3 and obtaining a better boiler sootblowing effect. After the sootblowing is completed, the nozzle 3 automatically returns to the initial position to prevent the nozzle 3 from accumulating dust, thereby solving the problems of waste of compressed air, disordered rotation sootblowing, and the nozzle 3 not returning to its original position after sootblowing, which causes dust accumulation in the nozzle 3, existing in the prior art shock wave sootblower.

[0036] The utility model provides a shock wave soot blower with a rotatable nozzle, which accurately controls the injection angle of the nozzle 3 by arranging a nozzle 3, a rotating shaft 4 connected to the nozzle 3, a rotating drive device 6 connected to the rotating shaft 4 and a detection device for detecting the rotation angle of the rotating shaft 4. The nozzle 3 does not stay or spray at an invalid soot blowing point, thereby achieving fixed-point precise spraying of the nozzle 3 and obtaining a better boiler soot blowing effect. After the soot blowing is completed, the nozzle 3 automatically returns to the initial position to prevent the nozzle 3 from accumulating dust, thereby solving the problems of waste of compressed air, disordered rotating soot blowing and dust accumulation in the nozzle caused by the nozzle not returning to its original position after the soot blowing is completed in the shock wave soot blower of the prior art.

[0037] Any details not mentioned in the above specific embodiments of the present invention belong to the known technologies in the art and can be implemented with reference to the known technologies.

[0038] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A shock wave soot blower with a rotatable nozzle, comprising a shock wave generator, a nozzle and a nozzle connected between the shock wave generator and the nozzle, characterized in that: It also includes a rotating shaft, a rotating drive device, a detection device and a control panel. One end of the rotating shaft extends into the interior of the nozzle and is connected to the nozzle, and the other end of the rotating shaft is connected to the rotating drive device. The rotating drive device includes a driving mechanism and a transmission mechanism arranged between the rotating shaft and the driving mechanism. The detection device includes a detection head and an angle sensor. The detection head is arranged at the other end of the rotating shaft away from the nozzle. The angle sensor is facing the detection head and is used for real-time detection of the angle of the detection head rotating with the rotating shaft. The control panel includes a touch screen and a PLC controller. The angle sensor and the driving mechanism are connected to the PLC controller.

2. The shock wave sootblower with a rotatable nozzle according to claim 1, characterized in that: The nozzle includes a nozzle body, an air inlet end and an air outlet end arranged at both ends of the nozzle body, the air inlet end is connected to one side of the shock wave generator by welding, the nozzle body and the air outlet end are arranged horizontally, and the air outlet end penetrates the furnace wall, and the nozzle is rotatably connected to the opening of the air outlet end.

3. The shock wave sootblower with a rotatable nozzle according to claim 2, characterized in that: The air inlet end is bent relative to the nozzle body so that the air inlet end is perpendicular to the air outlet end, and an arc-shaped bending portion is formed between the air inlet end and the nozzle body. A branch pipe is provided at the bending portion. The branch pipe is horizontally arranged and connected to the nozzle body, and a flange is provided at one end of the branch pipe away from the nozzle body; the rotating shaft horizontally penetrates the flange, the branch pipe and the nozzle body in sequence, one end of the rotating shaft is connected to the nozzle through a connecting plate, and the other end of the rotating shaft penetrates the flange and is connected to the rotating drive device.

4. The shock wave sootblower with a rotatable nozzle according to claim 3, characterized in that: The connecting plate is arranged at the opening of the air outlet end. The connecting plate is a circular iron plate or a stainless steel plate. The edge of the connecting plate is tightly fitted with the inner wall of the air outlet end of the nozzle. The nozzle is connected to the edge of one side of the connecting plate by welding. The center of the other side of the connecting plate is connected to one end of the rotating shaft. The connecting plate is provided with a plurality of through holes surrounding the rotating shaft. The nozzle is connected to the nozzle by arranging through holes on the connecting plate. The nozzle orifice of the nozzle is inclined relative to the nozzle.

5. The shock wave sootblower with a rotatable nozzle according to claim 3, characterized in that: The driving mechanism is a cylinder, and the transmission mechanism includes a connecting rod and an annular connecting part connected and fixed to one end of the connecting rod. The connecting part is sleeved and fixed on the other end of the rotating shaft away from the nozzle. A telescopic rod is provided at one end of the cylinder, and the telescopic rod is hinged to the other end of the connecting rod.

6. The shock wave sootblower with a rotatable nozzle according to claim 5, characterized in that: The angle sensor is fixed to the flange through a fixing rod, and the other side opposite to the shock wave generator is connected to an intake valve group through a pipeline. The intake valve group includes a ball valve, a filter and an intake solenoid valve. The distances between the ball valve, the filter and the intake solenoid valve and the shock wave generator are arranged in sequence from far to near, and the intake valve group is connected to a PLC controller.

7. The shock wave sootblower with a rotatable nozzle according to claim 3, characterized in that: The driving mechanism is a motor, and the motor is a stepper motor or a servo motor.

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