Auxiliary spraying device for fan shell machining

Abstract

The invention relates to the technical field of fan shell spraying, in particular to an auxiliary spraying device for fan shell machining. Comprising a spraying tank and a cover plate matched with the spraying tank, spraying equipment for spraying the inner wall of a shell is arranged at the bottom of the cover plate, a driving device for driving the shell to rotate is arranged on the outer wall of the spraying tank, and an air inducing piece matched with the shell is arranged in the spraying tank; the air inducing part guides harmful substances generated by spraying into a gas collecting cavity formed in the bottom of the air inducing part, a blocking mechanism arranged at the bottom of the gas collecting cavity is used for limiting harmful gas, a steam mechanism is arranged above the gas collecting cavity and comprises a heating system and a power system, and gas pushes the power system to move upwards and extrudes the heating system. And gas in the gas collection cavity is pushed outwards under the action of the power plate, so that the function of exhausting the stored gas from the exhaust hole is achieved, the phenomenon that harmful substances flow reversely when the external wind pressure is increased is prevented, and the health of workers is protected.

Description

Technical Field

[0001] The invention relates to the technical field of fan casing spraying, in particular to a fan casing processing auxiliary spraying device. Background Art

[0002] A fan is a device that relies on input mechanical energy to increase gas pressure and discharge gas. It is mainly used for ventilation and dust removal in factories, tunnels, ships, and mines. During the processing of the fan, it is necessary to spray the inside and outside of the fan casing to improve the anti-corrosion performance of the fan casing.

[0003] When the fan housing is sprayed in an indoor factory, harmful substances will be released during the spraying process. If they are not discharged in time, they will accumulate indoors and reach a dangerous concentration. Therefore, exhaust devices and purification devices are usually installed at the tank spraying station for ventilation, and the spray particles and dust generated during the spraying process are discharged to the outside of the factory. However, when the external wind pressure value is large and the wind pressure generated at the exhaust port of the exhaust device is lower than the external wind pressure, the exhaust device at this time cannot discharge the harmful substances, and the harmful substances will flow back into the factory under the action of the external wind pressure, causing the harmful substances filtered by the purification device to be blown back into the factory, which will cause the workers to inhale the risk, which is not good for human health. Summary of the invention

[0004] The object of the present invention is to provide a fan casing processing auxiliary spraying device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the purpose of the present invention is to provide an auxiliary spraying device for fan casing processing, including a spray can and a cover plate matched with the spray can, a spray device for spraying the inner wall of the casing is arranged at the bottom of the cover plate, and a driving device for driving the casing to rotate is arranged on the outer wall of the spray can, and an air induction piece that matches the casing is arranged inside the spray can, and the air induction piece guides the harmful substances generated by spraying into the air collecting chamber arranged at the bottom of the air induction piece, and a sealing mechanism arranged at the bottom of the air collecting chamber is used to limit the harmful gas, and a steam mechanism is arranged above the air collecting chamber, and the steam mechanism includes a heating system and a power system, and the gas drives the power system to move upward and squeeze the heating system, so that the heating system uses the steam generated by itself to open the sealing mechanism, and the power system moves downward to discharge the harmful gas in the air collecting chamber.

[0006] As a further improvement of the present technical solution, the air induced component includes a fan body provided at the bottom thereof, the air pipe coaxially connected to the bottom of the air induced component is fixed on the upper top plate, the upper top plate is fixedly connected to the spray tank, and the bottom of the upper top plate is coaxially connected with a telescopic bellows, and the telescopic bellows is connected to the air pipe.

[0007] As a further improvement of the technical solution, the annular plate provided on the outside of the telescopic bellows is fixedly connected to the upper top plate, the bottom of the annular plate is fixedly connected to the lower top plate, the lower top plate is fixedly connected to the spray tank, and an air collecting chamber is formed in the annular plate, which is connected to the exhaust hole opened on the lower top plate.

[0008] As a further improvement of the present technical solution, the power system includes a power plate and a power bending rod, wherein the power plate is fixedly connected to the power bending rod, the power plate is sleeved with a matching annular plate, and the power plate is fixedly connected to the telescopic bellows, the telescopic bellows passes through the power plate, and the power bending rod is two "U"-shaped rods connected end to end, and the power bending rod is slidably connected to the upper top plate.

[0009] As a further improvement of the technical solution, an auxiliary pipe is fixedly connected to the upper top plate, one end of the auxiliary pipe is connected to the gas collecting cavity, and the other end passes through the spray tank and is connected to the external environment.

[0010] As a further improvement of the technical solution, the end of the power bending rod passes through a piston shell fixed on the upper top plate, the exhaust pipe connected to the bottom of the piston shell is connected to the external environment, the piston plate is slidingly connected inside the piston shell, there is a gap between the piston plate and the inner wall of the piston shell, and the sliding groove opened in the piston shell is slidingly connected to the support plate, and a compression spring is fixedly connected to the upper surface of the support plate.

[0011] As a further improvement of the present technical solution, the heating system includes a piezoelectric ceramic plate and a heating block, the piezoelectric ceramic plate is electrically connected to the heating block, the piezoelectric ceramic plate is fixed to the top of the inner wall of the piston shell, the piston shell is connected to the liquid storage tank through a pipeline, the heating block is located in the liquid storage tank, the liquid storage tank is used to store low-boiling point liquid, and a pressure relief valve is provided at the piston shell and the pipeline.

[0012] As a further improvement of the present technical solution, the blocking mechanism includes a blocking plate, an end of the blocking plate is fixedly connected to one end of the traction rope, the other end of the traction rope is fixedly connected to the baffle, the push rod coaxially connected to the baffle is slidably connected to the upper top plate and the piston shell, and the top end of the tension spring sleeved on the push rod is fixedly connected to the upper top plate, and the bottom end is fixedly connected to the baffle.

[0013] As a further improvement of the present technical solution, the arch frame to which the blocking plate is slidably connected is fixed at the bottom of the lower top plate, the end of the auxiliary rod to which the arch frame is slidably connected is fixedly connected to the blocking plate, and the return spring on the auxiliary rod is fixedly connected to the blocking plate and the arch frame respectively.

[0014] As a further improvement of the technical solution, a quantitative liquid injection device is arranged at the top of the liquid storage tank, and the quantitative liquid injection device is used to inject a low-boiling point liquid into the liquid storage tank after each discharge of toxic gas.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the auxiliary spraying device for fan casing processing, the gas in the gas collecting cavity is pushed outward under the action of the power plate, so as to realize the function of discharging the previously stored gas from the exhaust hole, and prevent the phenomenon of harmful substances flowing in reverse when the external wind pressure increases, so as to protect the health of workers.

[0016] 2. In the auxiliary spraying device for fan casing processing, the rotation of the fan body is utilized to form a negative pressure in the air induction member. At this time, the airflow passes through the air induction member, the air pipe and the telescopic bellows and enters the air collecting chamber for short-term storage. In this state, the sealing mechanism seals the air collecting chamber to restrict the gas from being discharged outward.

[0017] 3. In the auxiliary spraying device for fan casing processing, the downward movement of the piston plate will also push the power bending rod to move downward, so that the air in the air collecting chamber is compressed. The downward movement of the piston plate will release the sealing plate, thereby releasing the restriction of the sealing plate on the gas in the air collecting chamber, allowing the gas in the air collecting chamber to be discharged outward, thereby achieving the discharge effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the spray tank, spray equipment and cover plate of the present invention; Figure 3 It is a schematic diagram of the partial internal structure of the spray can of the present invention; Figure 4 It is a front view of the cut-away internal structure of the liquid storage tank and the piston housing of the present invention; Figure 5 For the present invention Figure 4 A is an enlarged structural diagram; Figure 6 It is a schematic diagram of the internal structure of the piston housing of the present invention in a partial cutaway manner; Figure 7 This is a schematic diagram of the structure in which the piston plate of the present invention pushes the ejector rod to move; Figure 8 It is a bottom view of the cutaway structure of the spray tank of the present invention.

[0019] The meaning of each number in the figure is: 100, spray can; 110, cover plate; 120, spray equipment; 130, drive device; 140. Air induction member; 141. Fan body; 150, upper top plate; 151, lower top plate; 152, annular plate; 153, auxiliary pipe; 160, piston plate; 200, steam mechanism; 201, telescopic bellows; 210, power plate; 220, power bending rod; 230, liquid storage tank; 231, piston housing; 232, exhaust pipe; 233, support plate; 234, compression spring; 235, quantitative liquid injection device; 240, heating resistance block; 250, piezoelectric ceramic plate; 300, blocking mechanism; 301, arch frame; 310, blocking plate; 311, auxiliary rod; 312, return spring; 320, traction rope; 330, push rod; 331, tension spring. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. Example

[0023] like Figure 1-Figure 3As shown, a fan casing processing auxiliary spraying device is provided, including a spray tank 100 and a cover plate 110 matched with the spray tank 100, a spray device 120 for spraying the inner wall of the casing is arranged at the bottom of the cover plate 110, a driving device 130 for driving the casing to rotate is arranged on the outer wall of the spray tank 100, and an air induction piece 140 matching the casing is arranged inside the spray tank 100, the air induction piece 140 guides the harmful substances generated by the spraying to the gas collecting chamber arranged at the bottom of the air induction piece 140, and the sealing mechanism 300 arranged at the bottom of the gas collecting chamber is used to limit the harmful gas, and a steam mechanism 200 is arranged above the gas collecting chamber, and the steam mechanism 200 includes a heating system and a power system, and the gas drives the power system to move upward and squeeze the heating system, so that the heating system uses the steam generated by itself to open the sealing mechanism 300, and the gas collecting chamber is connected with the outside at this time, and the power system moves downward to discharge the harmful gas in the gas collecting chamber, thereby realizing the function of discharging the harmful substances.

[0024] It can be seen that in order to achieve the smooth discharge of harmful gases, the expansion of the gas is used to drive the power system to make the heating system produce steam, and then the steam is used to move in the opposite direction to release the sealing mechanism 300, so that the gas collecting chamber is connected to the outside. At the same time, the steam reversely drives the power system to discharge the harmful gases collected in the gas collecting chamber, thereby achieving the smooth discharge of toxic gases.

[0025] The structure of the spraying equipment 120 is disclosed below. First, the spraying equipment 120 is composed of a plurality of feed pipes, each of which is provided with a plurality of nozzles, and the connection points of the plurality of feed pipes pass through the cover plate 110. When spraying, the paint can be sprayed out from the nozzle by connecting the external feed equipment to the end of the feed pipe.

[0026] Secondly, in order to make multiple positions of the inner wall of the shell covered with paint, Figure 2 As shown, a plurality of rollers are arranged in an array at the top of the inner wall of the spray tank 100, and the rollers are in contact with the outer shell (the rollers at this time play a supporting role), and the driving device 130 includes a driving motor fixed on the spray tank 100, and the output shaft of the driving motor is connected to one of the rollers through a belt. In this way, the inner wall of the outer shell is sprayed by driving the outer shell to rotate, thereby achieving coverage of the inside of the outer shell. The above process is the prior art, and its purpose is to enable technical personnel in this field to understand the entire specific process of spraying.

[0027] Further, combined with Figure 3As shown, when performing spraying operation, in order to collect harmful gases generated during the spraying process, the air induction member 140 includes a fan body 141 provided at the bottom thereof, and the air pipe coaxially connected to the bottom of the air induction member 140 is fixed on the upper top plate 150, and the upper top plate 150 is fixedly connected to the spray tank 100, and the bottom of the upper top plate 150 is coaxially connected to a telescopic bellows 201, and the telescopic bellows 201 is connected to the air pipe. On the other hand, an annular plate 152 provided on the outside of the telescopic bellows 201 is fixedly connected to the upper top plate 150, and the bottom of the annular plate 152 is fixedly connected to the lower top plate 151, and the lower top plate 151 is fixedly connected to the spray tank 100, and an air collecting chamber is formed in the annular plate 152, and the air collecting chamber is connected to the exhaust hole opened on the lower top plate 151 (wherein, the exhaust hole refers to Figure 3 As shown). When the gas is guided, the rotation of the fan body 141 is used to form a negative pressure in the air induction member 140. Figure 2 As shown, an air pipe connected to the air induction member 140 is provided on the cover plate 110 (this is the prior art and will not be described in detail here). In this way, the airflow passes through the air induction member 140, the air pipe and the telescopic bellows 201 and enters the air collecting cavity for short-term storage. In this state, the sealing mechanism 300 seals the air collecting cavity to restrict the gas from being discharged outward.

[0028] As the volume of gas in the gas collecting chamber increases, the gas gradually pushes the power system upward, wherein the power system includes a power plate 210 and a power bending rod 220, the power plate 210 is fixedly connected to the power bending rod 220, the power plate 210 is sleeved with the matching annular plate 152, and the power plate 210 is fixedly connected to the telescopic bellows 201, the telescopic bellows 201 runs through the power plate 210, the power bending rod 220 is two "U"-shaped rods connected end to end, and the power bending rod 220 is slidably connected to the upper top plate 150. In addition, an auxiliary pipe 153 is fixedly connected to the upper top plate 150, one end of the auxiliary pipe 153 is connected to the gas collecting chamber, and the other end passes through the spray tank 100 and is connected to the external environment. In this way, when the gas in the air collecting chamber at the bottom of the power plate 210 continues to increase, during this process, the power plate 210 moves upward, the telescopic bellows 201 contracts, and the power plate 210 discharges the air in the air collecting chamber above it into the external environment through the auxiliary pipe 153. Secondly, the power plate 210 pushes the power bending rod 220 to move upward to provide power for the subsequent extrusion heating system.

[0029] On the contrary, when the power plate 210 moves downward, the external environment enters into the air collecting chamber above the power plate 210 through the auxiliary pipe 153 to ensure the normal reciprocating movement of the power plate 210.

[0030] Then, combine Figure 4 and Figure 5As shown, the end of the power bending rod 220 passes through the piston shell 231 fixed on the upper top plate 150, the piston shell 231 is slidably connected to the piston plate 160, and the slide groove opened in the piston shell 231 is slidably connected to the support plate 233, and the upper surface of the support plate 233 is fixedly connected with a compression spring 234. In this way, when the end of the power bending rod 220 moves to contact with the piston plate 160, the piston plate 160 moves upward under the push of the power bending rod 220 and contacts with the support plate 233.

[0031] Preferably, on the basis of the above structure, the structure of the heating system is disclosed, the heating system includes a piezoelectric ceramic plate 250 and a heating block 240, the piezoelectric ceramic plate 250 and the heating block 240 are electrically connected, the piezoelectric ceramic plate 250 is fixed to the top of the inner wall of the piston shell 231, the piston shell 231 is connected to the liquid storage tank 230 through a pipeline, the heating block 240 is located in the liquid storage tank 230, the liquid storage tank 230 is used to store low boiling point liquid (such as trichlorotrifluoroethane liquid, the boiling point of this type of liquid does not exceed 50°C, and has the characteristic of rapid evaporation at high temperature), and a pressure relief valve is provided at the piston shell 231 and the pipeline. Therefore, in the process of the piston plate 160 moving upward, as the height of the support plate 233 continues to rise, the compression spring 234 squeezes the piezoelectric ceramic plate 250, so that the piezoelectric ceramic plate 250 is charged, and the liquid in the liquid storage tank 230 is heated by the electrically connected heating block 240, and the liquid is heated and evaporated rapidly. When the pressure in the pipeline breaks through the pressure relief valve, the pressure relief valve is opened at this time (conversely, when external gas enters the liquid storage tank 230 from the pipeline, the pressure relief valve is closed), and the evaporated gas has a large air pressure at this time, and the gas instantly pushes the support plate 233 and the piston plate 160 downward in the opposite direction (this process is similar to the explosion effect).

[0032] Because the exhaust pipe 232 connected to the bottom of the piston housing 231 is connected to the external environment, Figure 4 Based on and combined with Figure 6 As shown, there is a gap between the piston plate 160 and the inner wall of the piston shell 231. In this way, after the gas ejected from the pipeline is released instantly, most of the gas pushes the piston plate 160 to move downward, while a small part of the gas is discharged from the gap between the piston plate 160 and the piston shell 231, and finally discharged to the outside through the exhaust pipe 232.

[0033] Then, the piston plate 160 moves downward, which also pushes the power bending rod 220 to move downward, compressing the air in the air collecting chamber. Figure 3 As shown, the piston plate 160 moves downward to release the blocking mechanism 300, thereby releasing the restriction of the blocking mechanism 300 on the gas in the gas collecting chamber, and the gas in the gas collecting chamber is discharged to the outside.

[0034] Based on the above structure, Figure 7 and Figure 8 The specific structure of the blocking mechanism 300 is shown, and the blocking mechanism 300 includes a blocking plate 310, the end of the blocking plate 310 is fixedly connected to one end of a traction rope 320, the other end of the traction rope 320 is fixedly connected to a baffle, a push rod 330 coaxially connected to the baffle is slidably connected to the upper top plate 150 and the piston shell 231, and a tension spring 331 sleeved on the push rod 330 is fixedly connected to the upper top plate 150 at the top end and fixedly connected to the baffle at the bottom end. On the other hand, the arch frame 301 slidably connected to the blocking plate 310 is fixed at the bottom of the lower top plate 151, the end of the auxiliary rod 311 slidably connected to the arch frame 301 is fixedly connected to the blocking plate 310, and the return spring 312 sleeved on the auxiliary rod 311 is fixedly connected to the blocking plate 310 and the arch frame 301, respectively. Under normal conditions, the tension spring 331 and the return spring 312 maintain a balanced state, at which time the sealing plate 310 blocks the air collecting chamber. When the piston plate 160 pushes the push rod 330 downward, the tension spring 331 is stretched in this process, and the elastic potential energy of the tension spring 331 increases, while the traction rope 320 is continuously released, and under the elastic action of the return spring 312, the return spring 312 pulls the sealing plate 310 to move, so that the air collecting chamber is connected to the outside.

[0035] At the same time, the compressed gas in the gas collecting chamber is discharged outward at the moment when the sealing plate 310 opens the exhaust hole. At this time, the compressed gas pressure is greater than the external wind pressure, and combined with Figure 3 The auxiliary effect of the middle power plate 210 is used to achieve the emission of toxic gases.

[0036] The gas in the gas collecting chamber is pushed outwards by the power plate 210, so as to discharge the previously stored gas from the exhaust hole, and prevent the backflow of harmful substances when the external wind pressure increases, so as to protect the health of indoor workers.

[0037] When the thrust on the piston plate 160 disappears, Figure 7 Based on the combination of Figure 4 and Figure 5 As shown, at this time, the compression spring 234 is separated from the extrusion of the piezoelectric ceramic plate 250, and the compression spring 234 returns to the normal state (not extruded with the piezoelectric ceramic plate 250). Then, under the elastic action of the tension spring 331, the sealing plate 310 blocks the exhaust hole again, and then the above process is repeated to continuously circulate and discharge the gas.

[0038] Secondly, after the heating block 240 stops heating, the residual heat inside it will generate steam. For this reason, a quantitative liquid injection device 235 is provided at the top of the liquid storage tank 230. The quantitative liquid injection device 235 is used to inject a low-boiling point liquid into the liquid storage tank 230 after each discharge of toxic gas. In this way, not only can the liquid be replenished but also the temperature of the liquid inside the liquid storage tank 230 can be lowered, thereby reducing the generation of steam.

[0039] It is additionally noted that the quantitative liquid injection device 235 is intended to precisely control, deliver or replenish liquid to ensure accuracy and repeatability in a specific application. The role of the quantitative liquid injection device 235 here is to replenish liquid after each evaporation of liquid. This device is a prior art and will not be described in detail here.

[0040] Finally, considering that directly discharging toxic gases into the air will cause air pollution, a purification device (such as an activated carbon adsorber) can be set up to reprocess the toxic gases after the gases are discharged through the exhaust holes, thereby protecting the air.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fan casing processing auxiliary spraying device, comprising a spraying tank (100) and a cover plate (110) matched with the spraying tank (100), a spraying device (120) for spraying the inner wall of the casing is arranged at the bottom of the cover plate (110), and a driving device (130) for driving the casing to rotate is arranged on the outer wall of the spraying tank (100), characterized in that: An air induction member (140) that matches the outer shell is arranged inside the spray can (100), and the air induction member (140) guides harmful substances generated by spraying to an air collecting chamber arranged at the bottom of the air induction member (140). A sealing mechanism (300) arranged at the bottom of the air collecting chamber is used to limit harmful gases, and a steam mechanism (200) is arranged above the air collecting chamber. The steam mechanism (200) includes a heating system and a power system. The gas pushes the power system to move upward and squeeze the heating system, so that the heating system uses the steam generated by itself to open the sealing mechanism (300), and the power system moves downward to discharge the harmful gases in the air collecting chamber.

2. The fan casing processing auxiliary spraying device according to claim 1 is characterized in that: The air induction member (140) comprises a fan body (141) provided at the bottom thereof; an air pipe coaxially connected to the bottom of the air induction member (140) is fixed on an upper top plate (150); the upper top plate (150) is fixedly connected to a spray can (100); and a telescopic bellows (201) is coaxially connected to the bottom of the upper top plate (150); the telescopic bellows (201) is in communication with the air pipe.

3. The fan casing processing auxiliary spraying device according to claim 2 is characterized in that: An annular plate (152) provided on the outside of the telescopic bellows (201) is fixedly connected to the upper top plate (150), the bottom of the annular plate (152) is fixedly connected to the lower top plate (151), the lower top plate (151) is fixedly connected to the spray tank (100), and an air collecting cavity is formed in the annular plate (152), which is connected to an exhaust hole provided on the lower top plate (151).

4. The fan casing processing auxiliary spraying device according to claim 3 is characterized in that: The power system comprises a power plate (210) and a power bending rod (220), wherein the power plate (210) is fixedly connected to the power bending rod (220), the power plate (210) is sleeved with a matching annular plate (152), and the power plate (210) is fixedly connected to a telescopic bellows (201), the telescopic bellows (201) passes through the power plate (210), and the power bending rod (220) is two "U"-shaped rods connected end to end, and the power bending rod (220) is slidably connected to an upper top plate (150).

5. The fan casing processing auxiliary spraying device according to claim 3 is characterized in that: An auxiliary tube (153) is fixedly connected to the upper top plate (150); one end of the auxiliary tube (153) is connected to the gas collecting cavity, and the other end passes through the spray tank (100) and is connected to the external environment.

6. The fan casing processing auxiliary spraying device according to claim 4 is characterized in that: The end of the power bending rod (220) passes through a piston shell (231) fixed on the upper top plate (150); an exhaust pipe (232) connected to the bottom of the piston shell (231) is connected to the external environment; a piston plate (160) is slidably connected inside the piston shell (231); a gap exists between the piston plate (160) and the inner wall of the piston shell (231); a sliding groove provided in the piston shell (231) is slidably connected to a support plate (233); and a compression spring (234) is fixedly connected to the upper surface of the support plate (233).

7. The fan casing processing auxiliary spraying device according to claim 6 is characterized in that: The heating system comprises a piezoelectric ceramic plate (250) and a heating resistance block (240), wherein the piezoelectric ceramic plate (250) is electrically connected to the heating resistance block (240), the piezoelectric ceramic plate (250) is fixed to the top of the inner wall of a piston shell (231), the piston shell (231) is connected to a liquid storage tank (230) through a pipeline, the heating resistance block (240) is located in the liquid storage tank (230), the liquid storage tank (230) is used to store low-boiling-point liquid, and a pressure relief valve is provided at the piston shell (231) and the pipeline.

8. The fan casing processing auxiliary spraying device according to claim 6 is characterized in that: The blocking mechanism (300) comprises a blocking plate (310), the end of the blocking plate (310) being fixedly connected to one end of a traction rope (320), the other end of the traction rope (320) being fixedly connected to a baffle, a push rod (330) coaxially connected to the baffle, an upper top plate (150) and a piston shell (231) being slidably connected, and a tension spring (331) sleeved on the push rod (330) having its top end fixedly connected to the upper top plate (150) and its bottom end fixedly connected to the baffle.

9. The fan casing processing auxiliary spraying device according to claim 8, characterized in that: The arch frame (301) slidably connected to the blocking plate (310) is fixed at the bottom of the lower top plate (151), the end of the auxiliary rod (311) slidably connected to the arch frame (301) is fixedly connected to the blocking plate (310), and the return spring (312) sleeved on the auxiliary rod (311) is respectively fixedly connected to the blocking plate (310) and the arch frame (301).

10. The fan casing processing auxiliary spraying device according to claim 7, characterized in that: A quantitative liquid injection device (235) is provided at the top of the liquid storage tank (230), and the quantitative liquid injection device (235) is used to inject a low-boiling-point liquid into the liquid storage tank (230) after each discharge of toxic gas.

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