Spraying device and rotation-resistant material level switch with same

Abstract

The utility model discloses a spray-washing device and a rotation-resistant material level switch with the same, the spray-washing device is suitable for spray-washing a material level switch body, the spray-washing device comprises a support and a spray-washing assembly, the spray-washing assembly is connected with the support, the spray-washing assembly comprises a water supply pipe and a plurality of spray-washing parts, the water supply pipe is provided with a water supply end used for being connected with a water source, and the spray-washing parts are connected with the support. The spray washing parts are connected with the water supply pipe, and at least one spray washing part is arranged towards the material level switch body so as to spray and wash the material level switch body. According to the spray washing device, the phenomenon that material blocking false alarm is triggered due to jamming of the material level switch body can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of material level switch cleaning devices, in particular to a spray cleaning device and a rotary paddle material level switch having the same. Background Art

[0002] Limestone slurry is a commonly used flue gas desulfurization absorbent. Its production process is to feed the limestone raw material into a wet ball mill through a feeder, and then make limestone slurry after being ground by the wet ball mill. The limestone slurry is then sent to a limestone slurry tank and then pumped into an absorption tower for chemical reaction to remove sulfur dioxide from the flue gas.

[0003] A level switch is installed at the material inlet of the wet ball mill to monitor the limestone level of the limestone inlet pipe of the wet ball mill and to sound an alarm when there is material blockage. Since the feeder will carry fine limestone particles when conveying the limestone raw materials to the wet ball mill, and the humidity at the inlet of the wet ball mill is relatively high, it is easy for the limestone particles to adhere to the blades and rotating shaft of the level switch, causing the blades and rotating shaft of the level switch to get stuck, and then trigger the false alarm of material blockage of the level switch, causing a series of problems such as the feeder stopping, the wet ball mill idling, and the limestone slurry cannot be continuously supplied. After the material blockage alarm is triggered, the maintenance personnel need to remove the level switch for inspection and cleaning, wasting a lot of time and electricity resources. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the utility model proposes a spray cleaning device, which can prevent limestone particles from adhering to and accumulating on the level switch body and causing the rotating shaft and blades of the level switch body to become stuck, thereby preventing the occurrence of false alarms of material blockage caused by the sticking of the level switch body.

[0006] The spray device of the embodiment of the utility model is suitable for spraying the material level switch body, the spray device includes a bracket and a spray assembly, the spray assembly is connected to the bracket, the spray assembly includes a water supply pipe and multiple spray parts, the water supply pipe has a water supply end for connecting to a water source, the spray part is connected to the water supply pipe, at least one of the spray parts is arranged toward the material level switch body to spray the material level switch body.

[0007] In some embodiments, the spray assembly also includes an upper spray pipe arranged to be higher than the material level switch body, the upper spray pipe is connected to the water supply pipe, the upper spray pipe has an upper water spray hole arranged toward the material level switch body, and the upper water spray hole forms the spray part.

[0008] In some embodiments, the center line of the upper water spray hole forms an upper angle with the horizontal plane, and the upper angle is 0° to 75°.

[0009] In some embodiments, there are multiple upper water spray holes, and projections of center lines of at least two of the upper water spray holes on the cross section of the upper nozzle intersect.

[0010] In some embodiments, the level switch body includes blades, and the bracket includes a top plate, a bottom plate, a first side plate and a second side plate, and the top plate, the bottom plate, the first side plate and the second side plate form a protective cover for covering the blades.

[0011] In some embodiments, the spray assembly also includes a first spray pipe, which is closer to the first side plate than the second side plate, and is connected to the water supply pipe. The first spray pipe has a first water spray hole arranged toward the second side plate, and the first water spray hole forms the spray portion; and / or, the spray assembly also includes a second spray pipe, which is connected to the water supply pipe, and is closer to the second side plate than the first side plate, and has a second water spray hole arranged toward the first side plate, and the second water spray hole forms the spray portion; and / or, the spray assembly also includes a lower spray pipe arranged below the material level switch body, the lower spray pipe is connected to the water supply pipe, the lower spray pipe has a lower water spray hole, the center line of the lower water spray hole is parallel to the upper plate surface of the bottom plate, and the lower water spray hole forms the spray portion.

[0012] In some embodiments, the number of the first water spray holes is multiple, and the projections of the center lines of at least two of the first water spray holes on the first nozzle intersect; and / or, the number of the second water spray holes is multiple, and the projections of the center lines of at least two of the second water spray holes on the second nozzle intersect.

[0013] In some embodiments, a valve assembly is further included, wherein the valve assembly is connected to the water supply pipe to control the on-off of the water supply pipe.

[0014] In some embodiments, the valve assembly includes a solenoid valve connected to the water supply pipe.

[0015] The rotary paddle level switch of the embodiment of the utility model comprises a level switch body and a spraying device, wherein the spraying device is the spraying device described in any of the above embodiments, and the level switch body is connected to the bracket.

[0016] The spray cleaning device of the embodiment of the utility model, when applied to a wet ball mill, can spray the material level switch body in the wet ball mill to wash away the limestone particles on the blades, rotating shaft and other positions of the material level switch body, thereby preventing the limestone particles from adhering to and accumulating on the material level switch body and causing the rotating shaft and blades of the material level switch body to become stuck, thereby preventing the occurrence of a false alarm of material blockage caused by the sticking of the material level switch body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the installation position of the rotary paddle material level switch according to an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 Sectional view of AA.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of a rotary paddle level switch according to an embodiment of the utility model.

[0020] Figure 4 It is a structural schematic diagram of a spray cleaning device according to an embodiment of the utility model.

[0021] Figure 5 yes Figure 3 Cross-sectional view of BB.

[0022] Figure 6 yes Figure 3 Cross-sectional view of CC.

[0023] Figure 7 yes Figure 3 Cross-sectional view of DD.

[0024] Reference numerals:

[0025] 100. Rotary paddle level switch;

[0026] 10. Spray washing device;

[0027] 1. Bracket; 11. Top plate; 12. Bottom plate; 13. First side plate; 14. Second side plate; 15. Back plate; 16. Connecting plate;

[0028] 2. Spraying assembly; 21. Water supply pipe; 211. First pipe section; 212. Second pipe section; 22. Upper side spray pipe; 221. Upper side hole 1; 222. Upper side hole 2; 223. Upper side hole 3; 23. First spray pipe; 231. First water spray hole; 2311. Side hole 1; 2312. Side hole 2; 24. Second spray pipe; 241. Second water spray hole; 25. Lower side spray pipe; 251. Lower side water spray hole;

[0029] 3. Valve assembly; 31. Solenoid valve; 32. Manual valve;

[0030] 20. Material level switch body; 201. Blade; 202. Rotating shaft; 203. Motor;

[0031] 201. Inlet material pipe; 202. Through slot. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0033] like Figures 1 to 3 As shown, the spraying device 10 of the embodiment of the utility model is suitable for spraying the material level switch body 20, the spraying device 10 includes a bracket 1 and a spraying assembly 2, the spraying assembly 2 is connected to the bracket 1, the spraying assembly 2 includes a water supply pipe 21 and a plurality of spraying parts, the water supply pipe 21 has a water supply end for connecting to a water source, the spraying part is connected to the water supply pipe 21, and at least one spraying part is arranged toward the material level switch body 20 to spray the material level switch body 20.

[0034] The spray cleaning device 10 of the embodiment of the utility model, when applied to a wet ball mill, can spray the material level switch body 20 in the wet ball mill to wash away the limestone particles on the blades 201, the rotating shaft 202 and other positions on the material level switch body 20, so as to prevent the limestone particles from adhering to and accumulating on the material level switch body 20 and causing the rotating shaft 202 and the blades 201 of the material level switch body 20 to become stuck, thereby preventing the occurrence of a false alarm of material blockage caused by the sticking of the material level switch body 20.

[0035] like Figure 1 and Figure 2 As shown, the material level switch body 20 is arranged at the entrance of the wet ball mill, and is used to monitor the limestone material level of the limestone inlet material pipe 201 of the wet ball mill. Specifically, the material level switch body 20 and the bracket 1 are both arranged on the outside of the inlet material pipe 201 of the wet ball mill, and the bracket 1 is connected to the pipe wall of the inlet material pipe 201, so that the spray cleaning device 10 can be installed. A through groove 202 is opened on the pipe wall of the inlet material pipe 201, and the limestone raw material enters the wet ball mill through the inlet material pipe 201. When the inlet material pipe 201 is blocked, the limestone raw material accumulates at the material level switch body 20 through the through groove 202 on the inlet material pipe 201 and triggers an alarm, thereby reminding the operator that the wet ball mill is blocked.

[0036] The material level switch body 20 includes a rotating shaft 202 and a blade 201. The rotating shaft 202 is arranged horizontally and is rotatably connected to the bracket 1 through a bearing. The feeder is used to feed the limestone raw material into the wet ball mill. The limestone raw material forms a limestone flow on one side of the material level switch body 20. Therefore, limestone dust is easily attached to and accumulated on the blade 201 and the rotating shaft 202, causing the material level switch body 20 to falsely alarm.

[0037] It is understandable that, according to the use of the wet ball mill, the spray cleaning device 10 can be started regularly to achieve regular flushing of the level switch body 20 to prevent the blades 201, the rotating shaft 202 and other structures of the level switch body 20 from getting stuck.

[0038] In some embodiments, Figure 3 and Figure 4 As shown, the spray assembly 2 also includes an upper spray pipe 22 arranged to be higher than the level switch body 20, the upper spray pipe 22 is connected to the water supply pipe 21, and the upper spray pipe 22 has an upper water spray hole arranged toward the level switch body 20, and the upper water spray hole forms a spray portion.

[0039] Through the above arrangement, water flows from the upper side toward the level switch body 20 to flush the limestone particles attached to the level switch body 20 downwards, and the limestone water mixed with the limestone particles flows downwards, which can prevent secondary pollution from occurring, thereby achieving efficient flushing of the level switch body 20.

[0040] In some embodiments, the center line of the upper water spray hole forms an upper angle with the horizontal plane, and the upper angle is 0° to 75°.

[0041] By making a reasonable arrangement of the angle of the upper water spray hole, the water flow sprayed from the upper water spray hole can be in contact with the material level switch body 20 to the greatest extent, thereby improving the spraying efficiency.

[0042] In some embodiments, there are multiple upper water spray holes, and projections of center lines of at least two upper water spray holes on the cross section of the upper nozzle 22 intersect.

[0043] Through the above arrangement, the spraying range of the upper water spray hole can be increased, so that the material level switch body 20 can be more comprehensively flushed and cleaned, and the limestone dust on the material level switch body 20 can be flushed away, and the flushing effect is better.

[0044] Optionally, an upper angle formed by a center line of the upper water spray hole and a horizontal plane is 0° to 60°, for example, 5°, 15°, 30°, 45°, or 60°.

[0045] As an example, Figure 4 and Figure 5As shown, the upper nozzle 22 is arranged horizontally, and the length direction of the upper nozzle 22 is perpendicular to the extension direction of the rotating shaft 202. There are three types of upper water spray holes, namely, upper hole 1 221, upper hole 222 and upper hole 3 223, wherein the upper angle formed by the center line of the upper hole 1 221 and the horizontal plane is 0°, in other words, the center line of the upper hole 1 221 is parallel to the horizontal plane, the upper angle formed by the center line of the upper hole 222 and the horizontal plane is 30°, and the upper angle formed by the upper hole 3 223 and the horizontal plane is 60°; the projections of the center lines of the upper hole 1 221, the upper hole 222 and the upper hole 3 223 on the cross section of the upper nozzle 22 intersect at the center of the cross section of the upper nozzle 22, and the upper hole 1 221, the upper hole 222 and the upper hole 3 223 are arranged alternately in sequence along the length direction of the upper nozzle 22.

[0046] When the spray cleaning device 10 is started, the water flow sprayed from the upper side hole 1 221 has the longest range and a large water flow rate, and can flush the rotating shaft 202 and the bearing. The water flow sprayed from the upper side hole 222 can flush the rotating shaft 202 and the blade 201. The water flow sprayed from the upper side hole 3 223 can flush the blade 201, thereby achieving all-round flushing of the material level switch body 20 and reducing the probability of the material level switch body 20 getting stuck.

[0047] In some embodiments, Figure 2 As shown, the level switch body 20 includes a blade 201 , and the bracket 1 includes a top plate 11 , a bottom plate 12 , a first side plate 13 and a second side plate 14 , and the top plate 11 , the bottom plate 12 , the first side plate 13 and the second side plate 14 form a protective cover for covering the blade 201 .

[0048] The protective cover can protect structures such as the blades 201 and the rotating shaft 202 from being damaged by the falling limestone flow, and can also reduce the contact between the limestone dust and the blades 201 , thereby reducing the amount of limestone dust attached to the blades 201 .

[0049] Alternatively, if Figure 2 As shown, the bracket 1 further includes a back plate 15, which is arranged on a side of the top plate 11 away from the wet ball mill, and the four side surfaces of the back plate 15 are respectively welded to the top plate 11, the bottom plate 12, the first side plate 13 and the second side plate 14.

[0050] Thus, the side of the protective cover facing the through slot 202 of the inlet material pipe 201 is in an open state. When the inlet material pipe 201 is blocked, the blocked limestone raw materials can pass through the through slot 202 and accumulate in the direction of the material level switch body 20 and trigger an alarm to remind the operator. In addition, the back plate 15 can provide an installation position for the material level switch body 20 to facilitate the installation of the material level switch body 20.

[0051] It can be understood that the water flow rate sprayed out from the upper side hole 221 is relatively large, and can flush the rotating shaft 202 and the bearing while also flushing the upper part of the top plate 11 and the back plate 15.

[0052] like Figure 2 As shown, the rotating shaft 202 passes through the back plate 15 and is rotatably connected to the back plate 15 via a bearing. The level switch body 20 also includes a motor 203 . The motor 203 is disposed on a side of the back plate 15 away from the blades 201 and is connected to the back plate 15 .

[0053] Alternatively, if Figure 2 and Figure 3 As shown, the bottom plate 12 is tilted from top to bottom in a direction away from the back plate 15, and the angle between the plate surface of the bottom plate 12 and the vertical plane is 45°, and the vertical plane and the horizontal plane are perpendicular to each other.

[0054] Therefore, the limestone water formed after flushing the material level switch body 20 can flow downward along the bottom plate 12, which is more conducive to the discharge of the limestone water in the protective cover.

[0055] In some embodiments, Figures 3 to 7 As shown, the spray assembly 2 further includes a first spray pipe 23, the first spray pipe 23 is closer to the first side plate 13 than the second side plate 14, the first spray pipe 23 is connected to the water supply pipe 21, the first spray pipe 23 has a first spray hole 231 arranged toward the second side plate 14, and the first spray hole 231 forms a spray portion; and / or the spray assembly 2 further includes a second spray pipe 24, the second spray pipe 24 is connected to the water supply pipe 21, the second spray pipe 24 is closer to the second side plate 13 than the first side plate 13 The side plate 14, the second nozzle 24 has a second water spray hole 241 arranged toward the first side plate 13, and the second water spray hole 241 forms a spraying portion; and / or, the spraying assembly 2 also includes a lower nozzle 25 arranged below the material level switch body 20, the lower nozzle 25 is connected to the water supply pipe 21, and the lower nozzle 25 has a lower water spray hole 251, and the center line of the lower water spray hole 251 is parallel to the upper plate surface of the bottom plate 12, and the lower water spray hole 251 forms a spraying portion.

[0056] The first side plate 13 is flushed through the second water spray hole 241, the second side plate 14 is flushed through the first water spray hole 231, and the bottom plate 12 is flushed through the lower water spray hole 251. The first nozzle 23, the second nozzle 24 and the lower nozzle 25 can flush the inner walls of the protective cover to prevent excessive limestone dust attached to the inner wall of the protective cover from causing blockage in the protective cover, thereby reducing the probability of jamming of the material level switch body 20.

[0057] It can be understood that by setting the center line of the lower water spray hole 251 parallel to the upper plate surface of the bottom plate 12, the water flow sprayed from the lower water spray hole 251 moves parabolically and falls on the bottom plate 12 near the back plate 15, and then flows downward along the bottom plate 12 and is discharged, thereby achieving flushing of the bottom plate 12.

[0058] Alternatively, if Figure 4 and Figure 6 As shown, there are multiple lower water spray holes 251 , and the multiple lower water spray holes 251 are evenly arranged along the extension direction of the lower nozzle 25 .

[0059] Thus, the bottom plate 12 can be rinsed more comprehensively.

[0060] Alternatively, if Figure 2 As shown, the upper nozzle 22, the first nozzle 23, the lower nozzle 25 and the second nozzle 24 are connected end to end by welding to form a rectangular spray frame, and the upper nozzle 22, the first nozzle 23, the lower nozzle 25 and the second nozzle 24 are connected in sequence.

[0061] Thus, any one of the upper nozzle 22 , the first nozzle 23 , the lower nozzle 25 , and the second nozzle 24 may be communicated with the water supply pipe 21 .

[0062] Alternatively, if Figure 2 and Figure 3 As shown, the water supply pipe 21 is arranged on the upper side of the material level switch body 20 , and one end of the water supply pipe 21 away from the water supply end is connected to the middle position of the upper nozzle 22 .

[0063] Thus, water flows from the water supply pipe 21 into the upper nozzle 22, and enters the lower nozzle 25 via the first nozzle 23 and the second nozzle 24. Therefore, the water pressure in the upper nozzle 22 is the largest, and the water pressure in the lower nozzle 25 is the smallest. The limestone water can be discharged from top to bottom through the bottom plate 12, preventing the water from flowing back from bottom to top in the protective cover and causing secondary pollution to the bearing, top plate 11 and other structures.

[0064] In some embodiments, there are multiple first water spray holes 231, and the projections of the center lines of at least two first water spray holes 231 on the first nozzle 23 intersect; and / or, there are multiple second water spray holes 241, and the projections of the center lines of at least two second water spray holes 241 on the second nozzle 24 intersect.

[0065] Through the above arrangement, the flushing range of the first nozzle 23 and the second nozzle 24 can be further expanded, so that the first side plate 13, the second side plate 14 and the internal space of the protective cover can be flushed more comprehensively to achieve a better flushing effect.

[0066] Optionally, the angle between the center line of the first water spray hole 231 and the inner plate surface of the first side plate 13 is 0° to 60°, for example, 5°, 15°, 30°, 45°, or 60°.

[0067] Optionally, the angle between the center line of the second water spray hole 241 and the inner plate surface of the second side plate 14 is 0° to 60°, for example, 5°, 15°, 30°, 45°, or 60°.

[0068] As an example, Figure 4 and Figure 7 As shown, there are two types of first water spray holes 231, and the center lines of the two first water spray holes 231 have different angles with the inner plate surface of the first side plate 13, namely side hole one 2311 and side hole two 2312. The angle between the center line of side hole one 2311 and the inner plate surface of the first side plate 13 is 30°, and the angle between the center line of side hole two 2312 and the inner plate surface of the first side plate 13 is 60°; side hole one 2311 and side hole two 2312 are alternately arranged in sequence along the extension direction of the first nozzle 23, and the water flow sprayed by side hole one 2311 and side hole two 2312 can reach the second side plate 14, thereby flushing the second side plate 14.

[0069] It can be understood that the first water spray hole 231 located on the upper side can wash the blade 201 and the rotating shaft 202 from the side thereof.

[0070] Of course, in other embodiments, the first water spray holes 231 may be provided in more than two types.

[0071] The structure of the second nozzle 24 is the same as that of the first nozzle 23 and the two are arranged opposite to each other. The second water spray hole 241 includes side hole three and side hole four. The projection of side hole three on the cross section of the second nozzle 24 and the projection of side hole one 2311 on the cross section of the first nozzle 23 are arranged symmetrically to each other. The projection of side hole four on the cross section of the second nozzle 24 and the projection of side hole two 2312 on the cross section of the first nozzle 23 are arranged symmetrically to each other. Side hole three and side hole four are alternately arranged in sequence along the extension direction of the second nozzle 24. The water flow sprayed from side hole three and side hole four can reach the first side plate 13, thereby flushing the first side plate 13.

[0072] When designing and installing the first nozzle 23 and the second nozzle 24, the side holes 1 2311 and 2312 can be staggered with the side holes 3 and 3 in the vertical direction to prevent the water flows sprayed from the first nozzle 23 and the second nozzle 24 from colliding in the internal space of the protective cover.

[0073] Optionally, the apertures of the upper water spray hole, the first water spray hole 231, the second water spray hole 241 and the lower water spray hole 251 are all in the range of 1 mm to 2 mm, for example, 1.2 mm, 1.5 mm, 1.8 mm.

[0074] Thereby, the flushing effect on the material level switch body 20 can be improved.

[0075] Alternatively, if Figure 1 and Figure 2 As shown, the bracket 1 is detachably connected to the wet ball mill. Specifically, the bracket 1 also includes a connecting plate 16, which is arranged close to the inlet material pipe 201 of the wet ball mill and surrounds the protective cover. The connecting plate 16 is welded to the top plate 11, the bottom plate 12, the first side plate 13 and the second side plate 14. The connecting plate 16 is detachably connected to the pipe wall of the inlet material pipe 201 of the wet ball mill through a plurality of bolts, so that the through slot 202 of the inlet material pipe 201 is closed by the bracket 1.

[0076] In addition, the water supply pipe 21 includes a first pipe section 211 and a second pipe section 212 , which are detachably connected via a pipe joint. The first pipe section 211 is used to connect to a water source, and the second pipe section 212 is connected to the first nozzle 23 .

[0077] Therefore, when any one of the upper water spray hole, the first water spray hole 231, the second water spray hole 241 and the lower water spray hole 251 is blocked, the level switch body 20 and the spray device 10 can be removed from the wet ball mill, and the blocked water spray hole can be processed to ensure the normal use of the spray device 10.

[0078] In some embodiments, a valve assembly 3 is further included, and the valve assembly 3 is connected to the water supply pipe 21 to control the on-off of the water supply pipe 21 .

[0079] The upper nozzle 22, the first nozzle 23, the second nozzle 24 and the lower nozzle 25 can be simultaneously controlled to be turned on and off by the valve assembly 3, and the operation is relatively convenient.

[0080] Alternatively, if Figure 2 As shown, the valve assembly 3 is arranged on the first pipe section 211 .

[0081] In some embodiments, the valve assembly 3 includes a solenoid valve 31 , which is connected to the water supply pipe 21 .

[0082] By providing the solenoid valve 31 , the spray cleaning device 10 can be remotely controlled, which is more convenient.

[0083] Alternatively, if Figure 2 As shown, the valve assembly 3 further includes a manual valve 32 , which is disposed upstream of the solenoid valve 31 .

[0084] Therefore, when the spray cleaning device 10 or the material level switch body 20 is inspected and repaired, the water supply pipe 21 can also be disconnected by the manual valve 32. When the solenoid valve 31 is damaged, the operator can control the on and off of the water supply pipe 21 through the manual valve 32, thereby improving the flexibility and safety of the operation.

[0085] like Figure 1 and Figure 2 As shown, the rotary paddle level switch 100 of the embodiment of the utility model comprises a level switch body 20 and a spraying device 10 , the spraying device 10 is the spraying device 10 of any of the above embodiments, and the level switch body 20 is connected to the bracket 1 .

[0086] When the rotary paddle level switch 100 is applied to a wet ball mill, the spraying device 10 can spray the level switch body 20 to wash away the limestone particles on the blades 201, the rotating shaft 202, the bearings and other positions on the level switch body 20, thereby preventing the limestone particles from adhering to and accumulating on the level switch body 20 and causing the level switch body 20 to become stuck, thereby preventing the occurrence of a false alarm of material blockage caused by the sticking of the level switch body 20.

[0087] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A spray cleaning device (10), characterized in that: Suitable for spraying and washing a material level switch body (20), the spraying and washing device (10) comprises: Bracket (1); A spray cleaning component (2), the spray cleaning component (2) is connected to the bracket (1), the spray cleaning component (2) comprises a water supply pipe (21) and a plurality of spray cleaning parts, the water supply pipe (21) has a water supply end for connecting to a water source, the spray cleaning parts are connected to the water supply pipe (21), and at least one of the spray cleaning parts is arranged toward the material level switch body (20) to spray the material level switch body (20).

2. The spray cleaning device (10) according to claim 1, characterized in that: The spray assembly (2) further comprises an upper spray pipe (22) arranged to be higher than the material level switch body (20), the upper spray pipe (22) being connected to the water supply pipe (21), the upper spray pipe (22) having an upper spray hole arranged toward the material level switch body (20), the upper spray hole forming the spray portion.

3. The spray cleaning device (10) according to claim 2, characterized in that: The center line of the upper water spray hole forms an upper angle with the horizontal plane, and the upper angle is 0° to 75°.

4. The spray cleaning device (10) according to claim 3, characterized in that: The number of the upper water spray holes is multiple, and the projections of the center lines of at least two of the upper water spray holes on the cross section of the upper spray pipe (22) intersect.

5. The spray cleaning device (10) according to claim 1, characterized in that: The material level switch body (20) comprises a blade (201); the bracket (1) comprises a top plate (11), a bottom plate (12), a first side plate (13) and a second side plate (14); the top plate (11), the bottom plate (12), the first side plate (13) and the second side plate (14) form a protective cover for covering the blade (201).

6. The spray cleaning device (10) according to claim 5, characterized in that: The spray assembly (2) further comprises a first spray pipe (23), the first spray pipe (23) being closer to the first side plate (13) than the second side plate (14), the first spray pipe (23) being connected to the water supply pipe (21), the first spray pipe (23) having a first spray hole (231) arranged toward the second side plate (14), the first spray hole (231) forming the spray portion; and / or The spray assembly (2) further comprises a second spray pipe (24), the second spray pipe (24) being connected to the water supply pipe (21), the second spray pipe (24) being closer to the second side plate (14) than the first side plate (13), the second spray pipe (24) having a second spray hole (241) arranged toward the first side plate (13), the second spray hole (241) forming the spray portion; and / or The spray assembly (2) further comprises a lower spray pipe (25) arranged below the material level switch body (20), the lower spray pipe (25) being connected to the water supply pipe (21), the lower spray pipe (25) having a lower spray hole (251), the center line of the lower spray hole (251) being parallel to the upper plate surface of the bottom plate (12), and the lower spray hole (251) forming the spray portion.

7. The spray cleaning device (10) according to claim 6, characterized in that: The number of the first water spray holes (231) is multiple, and the projections of the center lines of at least two of the first water spray holes (231) on the first spray pipe (23) intersect; and / or The number of the second water spray holes (241) is multiple, and the projections of the center lines of at least two of the second water spray holes (241) on the second spray pipe (24) intersect.

8. The spray cleaning device (10) according to any one of claims 1 to 7, characterized in that: It also comprises a valve assembly (3), wherein the valve assembly (3) is connected to the water supply pipe (21) to control the on-off of the water supply pipe (21).

9. The spray cleaning device (10) according to claim 8, characterized in that: The valve assembly (3) comprises a solenoid valve (31), and the solenoid valve (31) is connected to the water supply pipe (21).

10. A rotary paddle level switch (100), characterized in that: include: Material level switch body (20); A spraying device (10), wherein the spraying device (10) is the spraying device (10) according to any one of claims 1 to 9, and the material level switch body (20) is connected to the bracket (1).

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