Rotary spray head ash removal mechanism

Abstract

The utility model relates to the technical field of boiler ash removal, in particular to a rotary spray head ash removal mechanism which comprises a generator tank body and further comprises an installation pipe, a spray pipe is arranged in the installation pipe, and the spray pipe is connected with the generator tank body through a communicating pipe. A sleeve is installed on the spray pipe, a spray head is rotationally connected into the sleeve, and a driving mechanism used for driving the spray head to rotate is arranged on the installation pipe. The power piece drives the rotating shaft to rotate, and the strong sound energy, the impact kinetic energy of the high-speed gas and the cleaning effect of the gas flow which are generated at the same time jointly act on an ash deposition layer or a coking layer of the heating surface, so that various types of deposited ash or cokes on the heating surface can be effectively removed. And meanwhile, the power piece drives the nozzle to rotate through the rotating shaft, so that the blowing heating surface can be enlarged, and the practicability of the ash removal mechanism is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler ash removal technical field, concretely is a rotary spray head ash removal mechanism. BACKGROUND

[0002] It is known that when the boiler is running at low load, the flue gas flow rate of the boiler is low, which causes a large amount of ash particles in the flue gas to settle on the tube plate of the preheater. When the ash settled on the surface tube plate of the preheater partially or completely blocks the tube opening, the flue gas flow through the tube is reduced or interrupted, the heat of the high-temperature flue gas heating tube wall decreases, and the tube wall temperature decreases. When the temperature of the tube is lower than the dew point temperature of the flue gas (136℃), the flue gas in the tube will condense, and the ash settled on the tube opening will form a blockage after the flue gas condenses.

[0003] The ash that has formed a blockage is at a relatively high temperature, quickly "hardens", and firmly adheres to the tube wall, causing the tube opening to be blocked. The above phenomenon will accelerate when the boiler is running at low load for a long time. In addition, fuel oil is used when the boiler is started and ignited, and the oil dirt produced by combustion is bonded on the surface of the tail air preheater, which also causes the tube surface to be covered with ash and dirt. If the above ash and dirt are not treated in time, the tube opening may eventually be blocked, affecting the normal operation and safety of the boiler.

[0004] When carbon particles produced by incomplete combustion of the heating furnace and ash in the fuel are adsorbed on the outer surface of the convection chamber furnace tube, the thermal resistance increases, and the heat transfer effect decreases. To ensure that the heating furnace operates at high efficiency for a long time, it is necessary to regularly remove the accumulated ash using a soot blower.

[0005] In the prior art, for example, a Chinese patent with application number 202321510300.5 and authorization announcement number CN220119399U, entitled "Boiler ash removal structure", discloses a boiler ash removal structure, which includes a mounting plate having a through hole on the surface; a first motor is fixed on one side of the mounting plate, and a threaded rod is fixed on the output shaft of the first motor; the threaded rod penetrates through the through hole; a bearing is fixed on one end of the threaded rod, and a base is fixed on the outer ring of the bearing; a threaded tube is connected to the outer side of the threaded rod by threads, a plurality of hydraulic rods are fixed to the outer side of the threaded tube, and a cleaning plate is fixed to one end of the hydraulic rods; a plurality of cleaners are fixed on the surface of the cleaning plate; the cleaner includes a shell; a second motor is fixed inside the shell.

[0006] In the above patent, the cleaning brush can be closer to the inner wall of the boiler by the action of the cleaner, and the cleaning angle of the cleaning brush is larger, so that the inner wall of the boiler can be cleaned more comprehensively.

[0007] In the prior art, such as the above patent, when the boiler needs to be cleaned, a cleaning brush is usually selected to reciprocally slide to clean the boiler, which can meet the needs of the cleaning of the boiler to a certain extent. However, it is known that even if the cleaning brush is large in size, there are still dead angles for cleaning dust, and dust impurities will quickly gather through the residual dust impurities, thereby increasing the workload of the dust cleaning operation and having certain disadvantages. Content of the utility model

[0008] The utility model discloses a rotary nozzle dust cleaning mechanism to solve the problems in the above background art.

[0009] To achieve the above object, the utility model provides the following technical scheme: a rotary nozzle dust cleaning mechanism, including generator jar body, still including installation pipe, the inside of installation pipe is provided with a spray pipe, and the spray pipe is connected through the communicating pipe between generator jar body;The spray pipe is installed with a sleeve, and the sleeve is rotatably connected with a nozzle in the inside, and the installation pipe is provided with a driving mechanism for driving the nozzle to rotate.

[0010] Further, the driving mechanism includes a rotating shaft rotatably connected to the spray pipe, and the rotating shaft drives the nozzle to rotate through the connecting sleeve;The installation pipe is provided with a power element for driving the rotating shaft to rotate.

[0011] Further, the power element includes a motor, and the motor is connected with the rotating shaft through a power shaft, for driving the rotating shaft to rotate.

[0012] Further, the power element includes a first cylinder installed on the installation pipe, a first one-way bearing is installed on the rotating shaft, a connecting plate is arranged outside the first one-way bearing, the output end of the first cylinder is connected with the first connecting plate, and the first one-way bearing is driven to rotate through the connecting plate.

[0013] Further, the power element includes a second cylinder arranged on the installation pipe, a second one-way bearing is arranged on the rotating shaft, and the output end of the second cylinder is connected with the second one-way bearing through a connecting rod assembly.

[0014] Further, the generator jar body is provided with a support frame at the bottom.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the rotary nozzle dust cleaning mechanism, in the actual use process, the power piece drives the rotation of the rotating shaft, plus the strong sound energy, the impact kinetic energy of the high-speed gas and the cleaning effect of the airflow generated at the same time, which act on the dust layer or the coking layer of the heated surface, can effectively remove various types of dust or coking on the heated surface. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0017] Figure 1 The overall structure schematic diagram provided by the embodiment of the utility model;

[0018] Figure 2 The local sectional structure schematic diagram provided by the embodiment of the utility model;

[0019] Figure 3 The power piece first embodiment and the rotating shaft connection state schematic diagram provided by the utility model;

[0020] Figure 4 The local structure schematic diagram of the power piece first embodiment provided by the utility model;

[0021] Figure 5 The power piece second embodiment and the rotating shaft connection state schematic diagram provided by the utility model;

[0022] Figure 6 The local structure schematic diagram of the power piece second embodiment provided by the utility model;

[0023] Figure 7 The third embodiment of the power piece provided by the utility model and the rotating shaft connection state schematic view are provided.

[0024] Figure 8 The third embodiment of the power piece provided by the utility model and the rotating shaft connection state schematic view are provided.

[0025] Mark 1, generator tank; 2, installation pipe; 3, communication pipe; 4, spray head; 5, sleeve; 6, spray pipe; 7, power piece; 8, rotating shaft; 9, connecting sleeve; 711, motor; 712, power shaft; 721, first cylinder; 722, connecting plate; 723, first one-way bearing; 731, second cylinder; 732, connecting rod assembly; 733, second one-way bearing. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] Please refer to Figures 1-8 The utility model provides a kind of technical solutions: a rotary spray head 4 ash removal mechanism, including generator tank 1, still including installation pipe 2, installation pipe 2 inside is provided with a spray pipe 6, spray pipe 6 and generator tank 1 between are connected by communication pipe 3;Spray pipe 6 is installed with a sleeve 5, sleeve 5 inside is rotatably connected with a spray head 4, installation pipe 2 is provided with the driving mechanism for driving spray head 4 to rotate.

[0028] Specifically, the rotating nozzle 4 dust cleaning mechanism, including generator tank 1, also includes installation pipe 2, installation pipe 2 inside is provided with a spray pipe 6, spray pipe 6 and generator tank 1 between through the communication pipe 3 is connected;Nozzle 6 is installed with a sleeve 5, sleeve 5 inside rotationally connected with a nozzle 4, specifically, the nozzle 4 is installed in the boiler and other equipment that need to clean the inside of the dust. Installation pipe 2 is provided with a driving mechanism for driving nozzle 4 rotation. Driving mechanism includes rotationally connected on the spray pipe 6 on the shaft 8, the shaft 8 through the connecting sleeve 9 drive nozzle 4 rotation;Installation pipe 2 is provided with a power element 7 for driving the rotation of the shaft 8. Specifically, in the actual use process, power element 7 drives the rotation of the shaft 8, a certain pressure gas (compressed air) through the shock wave generator each time pulse duration greater than 100 milliseconds, intensity up to 3-5 Mach (pipe in the spray pipe 6 shock intensity) shock wave, plus the strong sound energy, high speed gas impact kinetic energy, gas flow cleaning effect, together act on the dust layer on the heated surface or coking layer, can effectively remove the dust or coking on the heated surface of various types.

[0029] More specifically, wherein the nozzle 6 plane normal shock wave out of the nozzle, will form a spherical shock wave, spherical shock wave diameter increases, its ball center along the nozzle axis forward movement, at the same time with the spherical shock wave diameter increases, shock wave intensity decay, finally weaken to sound wave. In the limited space of the boiler flue, shock wave will be reflected, refraction due to the four walls of the flue, shock wave between the heated surface tube bundle produces transmission, refraction, reflection, in the limited space, the effective space of shock wave will be larger than that in the free space field. Shock wave will be reflected at the physical interface of dust and substrate, and can be introduced into the dust by refraction, shock wave intense pressure longitudinal wave on the dust, makes the dust break, refracted shock wave introduced into the dust also produces transverse wave in the dust body, and the incident wave and reflected wave interact with each other, so that the dust separates from the substrate.

[0030] At the same time in the nozzle due to shock wave and high speed airflow impact, produce very strong nozzle noise, 1 meter away from the nozzle, sound intensity is 160-170 decibel. Sound wave is a kind of mechanical wave in the form of energy, it shows as vibration, disturbance and fluctuation, the intense and rapid change of sound wave vibration, sound intensity reaches a certain degree (>155 decibel), will produce separation effect on the adhesion state of dust and coking on the heated surface, and make the dust and coking produce fatigue fracture and breakage tendency. Compressed air ejected from the nozzle reaches the heated surface pipe wall, which has a strong impact on the temperature of the dust layer and coking surface attached to it, breaks the original temperature balance of the dust layer and coking, the temperature of the dust layer and coking surface changes, the dust layer and coking produce thermal fatigue, which makes the dust layer and coking produce fragmentation and falling tendency.

[0031] The high-speed airflow (speed> sound speed) is sprayed out from the nozzle 4 behind the shock wave, and the direct action of the airflow kinetic energy on the ash and coking layer makes the ash and coking attached to the surface of the heated surface directly separate due to the mechanical external force.

[0032] In an embodiment of the utility model, the power part 7 specifically includes a motor 711, the motor 711 is connected with the rotating shaft 8 through a power shaft 712, and is used for driving the rotating shaft 8 to rotate, so that the nozzle 4 can rotate by 436 degrees, the swept heated surface is increased, and the practicability of the ash removal mechanism is further improved.

[0033] In another embodiment of the utility model, the power part 7 includes a first air cylinder 721 installed on the mounting pipe 2, the rotating shaft 8 is provided with a first one-way bearing 723, the outer side of the first one-way bearing 723 is provided with a connecting plate 722, the output end of the first air cylinder 721 is connected with the first connecting plate 722, the first one-way bearing 723 is driven to rotate through the connecting plate 722, and specifically, the first one-way bearing 723 is prior art, and specifically, the first one-way bearing 723 is a bearing that can freely rotate in one direction and is locked in another direction. A metal shell of the first one-way bearing 723 contains a plurality of rollers, needle rollers or balls, and the shape of the rolling seat (hole) makes it only roll in one direction, and a great resistance (so-called "one-way") is generated in the other direction. The state of the rotating shaft 8 can be adjusted through the first air cylinder 721 and the first one-way bearing 723, and then the state of the nozzle 4 can be adjusted to meet the needs of different working environments.

[0034] In still another embodiment of the utility model, the power part 7 includes a second air cylinder 731 arranged on the mounting pipe 2, the rotating shaft 8 is provided with a second one-way bearing 733, and the output end of the second air cylinder 731 is connected with the second one-way bearing 733 through a connecting rod assembly 732. Specifically, the second one-way bearing 733 is consistent with the first one-way bearing 723 in structure and working principle, and details are not described herein, the state of the nozzle 6 can be adjusted through the connecting rod assembly 732, and the compressed air and time can be saved.

[0035] In the embodiment of the utility model, the support frame is arranged at the bottom of the generator tank body 1, and the stability of the ash removal mechanism during work is improved.

[0036] It should be noted that the electric equipment involved in the application can be powered by a storage battery or an external power source.

[0037] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "set with", "connection" and the like, should do broad sense understanding, for example "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0038] Although the embodiments of the utility model have been shown and described, those ordinarily skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary nozzle dust cleaning mechanism, comprising a generator tank (1), characterized in that: a mounting pipe (2) is further included, a spray pipe (6) is arranged inside the mounting pipe (2), and the spray pipe (6) is connected with the generator tank (1) through a communication pipe (3); a sleeve (5) is mounted on the spray pipe (6), a nozzle (4) is rotatably connected inside the sleeve (5), and a driving mechanism for driving the nozzle (4) to rotate is arranged on the mounting pipe (2). The driving mechanism comprises a rotating shaft (8) rotatably connected with the spray pipe (6), the rotating shaft (8) drives the nozzle (4) to rotate through a connecting sleeve (9), and a power member (7) for driving the rotating shaft (8) to rotate is arranged on the mounting pipe (2). The power member (7) comprises a motor (711), the motor (711) is connected with the rotating shaft (8) through a power shaft (712), and the motor (711) is used for driving the rotating shaft (8) to rotate.

2. The rotary nozzle ash cleaning mechanism according to claim 1, wherein: The power member (7) comprises a first air cylinder (721) mounted on the mounting pipe (2), a first one-way bearing (723) is mounted on the rotating shaft (8), a connecting plate (722) is arranged outside the first one-way bearing (723), and the output end of the first air cylinder (721) is connected with the connecting plate (722) to drive the first one-way bearing (723) to rotate through the connecting plate (722).

3. The rotary nozzle soot cleaning mechanism of claim 2, wherein: The power member (7) comprises a second air cylinder (731) arranged on the mounting pipe (2), a second one-way bearing (733) is arranged on the rotating shaft (8), and the output end of the second air cylinder (731) is connected with the second one-way bearing (733) through a connecting rod assembly (732).

4. The rotary nozzle soot cleaning mechanism of claim 2, wherein: A supporting frame is arranged at the bottom of the generator tank (1).

5. The rotating nozzle ash removal mechanism according to claim 2, wherein: ​ 6. The rotary nozzle soot cleaning mechanism of claim 1, wherein: ​

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