Self-cleaning anti-blocking waste liquid spray gun

Abstract

The invention relates to the technical field of spraying devices, and discloses a self-cleaning anti-blocking waste liquid spray gun which comprises a gun body, a spray head, a filter short pipe and a cleaning assembly, the filter short pipe is arranged at the rear end of the gun body, a first connecting rod is arranged in the gun body to be connected with the cleaning assembly, the cleaning assembly comprises a rotating shaft, a spiral blade and a cleaning brush, and the spiral blade is made of carbon fiber reinforced polymer. A brush head is arranged at the front end of the cleaning brush and movably connected with the rotating shaft, the nozzle is in threaded connection with the gun body, and a filter screen and a sealing washer are arranged in the filter short pipe and in threaded connection with the gun body and the waste liquid pipe. The motor drives the rotating shaft through the bevel gear, so that the cleaning brush rotates to clean the spray head connecting plate, the jet flow holes are prevented from being blocked, the filter short pipe can be washed after use, the spray head and the filter short pipe can be taken down after long-time use, and the motor is started to clean the interior after the gun body is sealed by adding cleaning liquid. The method is suitable for various waste liquid treatment scenes.

Description

Technical Field

[0001] The invention relates to the technical field of spray devices, in particular to a self-cleaning and anti-clogging waste liquid spray gun. Background Art

[0002] In today's industrial fields, such as chemical industry, environmental protection treatment, surface treatment and other industries, waste liquid spray gun is an indispensable equipment, which undertakes the key task of spraying various waste liquids. For example, sewage treatment plants need to accurately spray sludge waste liquid to the designated area, and in the chemical production process, waste acid and waste alkali liquid must be safely and efficiently transported to the neutralization reaction device.

[0003] However, traditional waste liquid spray guns have exposed many problems in long-term use. Among them, the problem of nozzle clogging is particularly prominent. This is mainly due to the complexity of the waste liquid composition, which contains various impurities, such as solid particles, sticky substances, and precipitates produced by chemical reactions. These impurities are very easy to accumulate at the nozzle during the waste liquid injection process. Once the nozzle is blocked, a series of serious consequences will occur. The injection effect of the waste liquid will be greatly reduced, and phenomena such as uneven injection, shortened range, and unstable flow will occur. This will not only lead to substandard waste liquid treatment, but also greatly reduce the working efficiency of the entire treatment system. In order to restore the normal operation of the equipment, the company has to arrange equipment maintenance frequently, which undoubtedly increases the equipment maintenance cost. At the same time, the increase in equipment downtime also brings huge losses to production.

[0004] Most existing spray guns lack effective self-cleaning function, which makes it difficult to solve the nozzle blockage problem in time, further increasing the burden on enterprises in equipment management and production operations. Therefore, it is urgent to invent a self-cleaning and anti-blocking waste liquid spray gun to solve the above problem. Summary of the invention

[0005] 1. Technical issues to be resolved Once the nozzle of the spray gun in the prior art is clogged, it will not only affect the spraying effect of the waste liquid, causing problems such as uneven spraying, shortened range, unstable flow, etc., but most of the existing spray guns lack an effective self-cleaning function, which makes it difficult to solve the nozzle clogging problem in time. The present invention provides a self-cleaning and anti-clogging waste liquid spray gun.

[0006] (II) Technical solution In order to achieve the above-mentioned solution purpose, the present invention provides the following technical solutions: a self-cleaning and anti-blocking waste liquid spray gun, comprising a spray gun and a cleaning assembly, the spray gun comprising a gun body and a nozzle, a short filter tube is provided at the rear end of the gun body, a first connecting rod is transversely fixedly installed inside the gun body, and the cleaning assembly is movably connected to the middle position of the first connecting rod.

[0007] Furthermore, the cleaning component includes a rotating shaft, spiral blades and a cleaning brush. Six spiral blades symmetrically distributed in the center are fixedly installed on the rear end of the rotating shaft. The front end of the rotating shaft is provided with movable slots symmetrically distributed in the center. The cleaning brush is provided with sliding fins adapted to the movable slots and movably connected to the movable slots. A limit rod is fixedly installed at the center position of the cleaning brush. A groove adapted to the limit rod is opened in the rotating shaft. A spring is provided in the groove. The limit rod is movably installed in the groove, and the spring is in contact with the limit rod.

[0008] Furthermore, the nozzle is located at the front end of the gun body, the inner diameter of the nozzle is equal to the outer diameter of the gun body, the nozzle and the gun body are connected by a thread, and a first connecting tube is fixedly installed at the rear end of the gun body. The outer diameter of the first connecting tube is equal to the inner diameter of the connecting end of the filter short tube and the first connecting tube, and the first connecting tube and the filter short tube are connected by a thread.

[0009] Furthermore, a filter screen and a sealing gasket are provided in the filter short tube. The sealing gasket is located between the first connecting tube and the filter screen to ensure the sealing when the filter short tube is connected to the first connecting tube. The other end of the filter short tube is a cone with a diameter increasing from the inside to the outside, and a limit ring is provided between the tapered end and the filter screen.

[0010] Furthermore, the main body of the filtering short tube is made of high-strength, corrosion-resistant stainless steel, and the filter screen is made of stainless steel wire mesh with a thickness of 2-5 mm.

[0011] Furthermore, the nozzle is fixedly mounted with a connecting plate, the connecting plate is provided with jet holes which are centrally symmetrically distributed, the jet holes are connected with a nozzle which is fixedly mounted on the connecting plate, and the nozzle is conical.

[0012] Furthermore, a motor is fixedly mounted on the outer side of the gun body, the shaft of the motor is located in the first connecting rod, and the shaft is connected to a gear on a rotating shaft in the spherical sealing connector through a bevel gear.

[0013] Furthermore, the spiral blade is made of carbon fiber reinforced polymer, a high-performance composite material. The contour of the spiral blade is designed with a composite curve, with a larger radius of curvature in the area near the root. At the tip of the blade, the radius of curvature gradually decreases and transitions to a sharper shape. At the same time, the blade is given a certain twist angle, which gradually increases from the root to the tip.

[0014] Furthermore, three centrally symmetrical brush heads are fixedly mounted on the front end of the cleaning brush; the cleaning brush is made of polyetheretherketone, and the brush heads are made of nylon material.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a self-cleaning and anti-blocking waste liquid spray gun, which has the following beneficial effects: 1. The self-cleaning and anti-blocking waste liquid spray gun has a nozzle and a gun body connected by threads. During installation, the nozzle connecting plate contacts the brush head of the cleaning brush. With the help of a spring, the brush head is tightly fitted to the connecting plate for easy cleaning. The motor outside the gun body drives the rotating shaft of the cleaning component through a bevel gear. The rotating shaft drives the spiral blade and the cleaning brush to rotate. The cleaning brush head prevents the jet hole from being blocked to ensure normal spraying of the waste liquid. The overall structure is easy to assemble, disassemble, and clean and maintain daily, which improves the practicability, reliability, and economy of the equipment, and provides an efficient and convenient solution for industrial waste liquid treatment, with broad application value.

[0016] 2. The self-cleaning and anti-clogging waste liquid spray gun has a motor fixedly installed on the outside of the gun body. The shaft of the motor is located in the first connecting rod, and the shaft is connected to the gear on the rotating shaft in the spherical sealing connector through a bevel gear. When the motor is started, it will drive the rotating shaft to rotate. When the rotating shaft rotates, it will drive the cleaning brush to rotate through the movable slot on the rotating shaft. When the cleaning brush rotates, it will drive the connecting plate to clean, preventing the spray holes opened on the connecting plate from being blocked, thereby promoting the liquid to be sprayed out from the nozzle.

[0017] 3. The self-cleaning and anti-clogging waste liquid spray gun flushes the inside of the filter short tube from the connecting end of the filter short tube and the first connecting tube. Since the other end of the filter short tube is a cone with increasing diameter from the inside to the outside, it is easy to flush out impurities in the filter short tube, and it is not easy for impurities to remain, which makes it convenient to clean and reuse the filter short tube and the filter net.

[0018] 4. The self-cleaning and anti-blocking waste liquid spray gun uses a cleaning brush made of polyetheretherketone, which has good mechanical properties, high temperature resistance and chemical stability, is light in weight and easy to be processed into various shapes. The brush head is made of nylon material, which has good wear resistance, flexibility and chemical corrosion resistance. It can adapt to a variety of waste liquid environments and has less wear on the connecting plate. It is suitable for general industrial waste liquid injection systems, such as common chemical wastewater, light oily wastewater, etc. The spray gun cleaning, when the cleaning brush and the brush head are used together, can reduce the overall weight of the cleaning brush while ensuring a certain strength, and reduce the load on the rotating shaft. It is suitable for most waste liquid spray guns in general to moderately harsh environments.

[0019] 5. The self-cleaning and anti-clogging waste liquid spray gun has six spiral blades fixedly installed at the rear end of the rotating shaft, which are symmetrically distributed. The spiral blades are made of carbon fiber reinforced polymer (CFRP), a high-performance composite material. Carbon fiber has the advantages of high strength, low density and good corrosion resistance. After being compounded with a polymer matrix, it can significantly improve the strength-to-weight ratio of the propeller. Compared with traditional metal materials such as aluminum alloy, the weight of the CFRP propeller can be reduced by 30% to 50% under the same strength requirements. This can not only reduce the inertial force of the propeller when rotating at high speed and reduce the load on the drive device, but also improve the overall control performance of the spray gun. At the same time, the CFRP material has good chemical stability to various waste liquids, can adapt to the working environment of different corrosive waste liquids, and extend the service life of the propeller.

[0020] 6. The spiral blade profile of the self-cleaning and anti-clogging waste liquid spray gun adopts a composite curve design, so that it has a larger radius of curvature near the root to provide sufficient strength and torque transmission capability, ensuring that the propeller can stably drive the cleaning brush to rotate and promote the flow of waste liquid. At the tip of the blade, the radius of curvature gradually decreases and transitions to a sharper shape, which can reduce the air or waste liquid resistance at the tip during high-speed rotation, improve the efficiency of the shaft and spiral blades, and at the same time give the blade a certain twist angle, which gradually increases from the root to the tip, so that the attack angle of the blade at different radii is better matched with the flow direction of the waste liquid, reducing the generation of eddy currents, improving the propulsion efficiency of the spiral blades, and promoting the cleaning effect.

[0021] 7. After long-term use, the self-cleaning and anti-blocking waste liquid spray gun can remove the nozzle and the filter short tube from both ends of the gun body, add cleaning liquid into the gun body, and then connect the two ends of the gun body to matching sealing covers through threads, so that the two ends of the gun body are sealed. At this time, start the motor to drive the shaft to rotate, so that the shaft will drive the spiral blades to clean the oil and other impurities in the gun body. After a suitable time, remove the sealing cover and pour out the waste liquid, so as to realize daily cleaning of the inside of the gun body, which is beneficial to extend the service life of the gun body and cleaning components.

[0022] 8. The self-cleaning and anti-clogging waste liquid spray gun has an inner diameter of the nozzle that is equal to the outer diameter of the gun body. The nozzle and the gun body are connected by threads. A first connecting pipe is fixedly installed on the rear end of the gun body. The outer diameter of the first connecting pipe is equal to the inner diameter of the connecting end of the filter short tube and the first connecting pipe. The first connecting pipe and the filter short tube are connected by threads, thereby facilitating assembly and disassembly, and facilitating cleaning and daily use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the front structure of the main body of the present invention; Figure 3It is a schematic diagram of the main decomposition structure of the present invention; Figure 4 It is a schematic diagram of the structure of the filtering short tube in the present invention; Figure 5 It is a structural schematic diagram of the nozzle in the present invention; Figure 6 It is a schematic diagram of the internal structure of the gun body in the present invention; Figure 7 It is a structural schematic diagram of the rotating shaft in the present invention; Figure 8 It is a schematic diagram of the structure of the cleaning brush in the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the cleaning brush of the present invention.

[0024] In the figure: 10 gun body; 11 motor; 12 first connecting pipe; 13 first connecting rod; 14 spherical sealing connector; 20 filter short tube; 21 limit ring; 22 filter screen; 23 sealing gasket; 30 nozzle; 31 connecting plate; 32 jet hole; 33 nozzle; 40 rotating shaft; 41 gear; 42 spiral blade; 43 cleaning brush; 44 brush head; 45 limit rod; 46 movable slot; 47 spring. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are 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 device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] 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 technical features indicated. Therefore, a feature defined as "first" or "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.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the descriptions with reference to the terms "one scheme", "some schemes", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more schemes or examples.

[0030] See also Figures 1 to 9 The present invention proposes a self-cleaning and anti-clogging waste liquid spray gun. When in use, the spray gun is first assembled. The spray gun includes a gun body 10, a filtering short tube 20 and a nozzle 30. The nozzle 30 is located at the front end of the gun body 10. The inner diameter of the nozzle 30 is equal to the outer diameter of the gun body 10. The nozzle 30 and the gun body 10 are connected by threads. The filtering short tube 20 is located at the rear end of the gun body 10. A first connecting tube 12 is fixedly installed at the rear end of the gun body 10. The outer diameter of the first connecting tube 12 is equal to the inner diameter of the connecting end of the filtering short tube 20 and the first connecting tube 12. The first connecting tube 12 and the filtering short tube 20 are connected by threads.

[0031] The main body of the filter short tube 20 is made of high-strength, corrosion-resistant stainless steel to ensure that it will not be corroded and damaged in an environment of long-term contact with various waste liquids, thereby ensuring the integrity and stability of the structure. The stainless steel material also has good mechanical properties and can withstand certain pressures and external force impacts.

[0032] A filter screen 22 and a sealing gasket 23 are provided in the connecting end between the filter short tube 20 and the first connecting tube 12. The sealing gasket 23 is located between the first connecting tube 12 and the filter screen 22, and is used to ensure the sealing when the filter short tube 20 is connected to the first connecting tube 12. The other end of the filter short tube 20 is a cone with an increasing diameter from the inside to the outside. A limiting ring 21 is provided between the conical end and the filter screen 22. The limiting ring 21 is used to limit the filter screen 22 when the first connecting tube 12 and the filter short tube 20 are installed by threads.

[0033] The outer diameter of the tapered end of the filter short tube 20 is provided with a thread. When in use, the tapered end of the filter short tube 20 is threadedly connected to the waste liquid pipe. The filter screen 22 in the filter short tube 20 will filter the large particles of impurities in the waste liquid. The filter screen 22 is made of stainless steel wire mesh with a thickness of 2-5 mm, which can ensure sufficient filtering area and strength, and will not occupy too much internal space of the filter tube to affect the circulation of the waste liquid. According to the size and nature of the impurity particles in the waste liquid, a suitable mesh number is selected. For waste liquid containing larger impurities (such as a particle size greater than 1 mm), a filter screen with a smaller mesh number (such as 10-20 mesh) can be selected; for waste liquid with smaller impurity particles (such as a particle size between 0.1-1 mm), a filter screen with a larger mesh number (such as 50-100 mesh) is selected. The stainless steel wire mesh has good corrosion resistance and mechanical strength, can effectively filter solid impurities in the waste liquid, and is not easily damaged during cleaning and repeated use.

[0034] After use, the two ends of the filter short tube 20 can be separated from the first connecting tube 12 and the waste liquid pipe respectively, and the inside of the filter short tube 20 can be flushed from the connecting end of the filter short tube 20 and the first connecting tube 12. Since the other end of the filter short tube 20 is a cone with increasing diameter from the inside to the outside, it is easy to flush out impurities in the filter short tube 20, and it is not easy for impurities to remain, which makes it convenient to clean and reuse the filter short tube 20 and the filter net 22.

[0035] When the nozzle 30 is installed with the gun body 10, a first connecting rod 13 is fixedly installed transversely inside the gun body 10, and a cleaning assembly is movably installed at the middle position of the first connecting rod 13. The cleaning assembly includes a rotating shaft 40, a spiral blade 42 and a cleaning brush 43. The connection between the rotating shaft 40 and the cleaning brush 43 is provided with movable card grooves 46 which are centrally symmetrically distributed. The cleaning brush 43 is provided with sliding fins adapted to the movable card grooves 46. A limiting rod 45 is fixedly installed at the center position of the cleaning brush 43. A groove adapted to the limiting rod 45 is opened in the rotating shaft 40, and a spring 47 is provided in the groove. The limiting rod 45 is movably installed in the groove. The spring 47 is in contact with the limiting rod 45, and three brush heads 44 are fixedly installed at the front end of the cleaning brush 43 in a centrally symmetrical manner. When the nozzle 30 is installed on the gun body 10, the connecting plate 31 on the nozzle 30 will contact and resist the brush head 44, so that the brush head 44 will drive the limiting rod 45 in the cleaning brush 43 to move in the groove provided in the rotating shaft 40. At this time, the spring 47 in the groove will provide a force to the limiting rod 45 to make the brush head 44 on the cleaning brush 43 contact with the connecting plate 31, thereby facilitating the brush head 44 to clean the connecting plate 31, promoting the brush head 44 to clean the connecting plate 31 more thoroughly, and enhancing the cleaning effect.

[0036] A motor 11 is fixedly installed on the outside of the gun body 10. The shaft of the motor 11 is located in the first connecting rod 13, and the shaft is connected to the gear 41 on the rotating shaft 40 in the spherical sealing connector 14 through the bevel gear 41, so that when the motor 11 is started, it will drive the rotating shaft 40 to rotate. When the rotating shaft 40 rotates, it will drive the cleaning brush 43 to rotate through the movable slot 46 on the rotating shaft 40. When the cleaning brush 43 rotates, it will drive the connecting plate 31 to clean, so as to prevent the spray hole 32 opened on the connecting plate 31 from being blocked, thereby promoting the liquid to be sprayed out from the nozzle 33.

[0037] The cleaning brush 43 is made of polyetheretherketone, which has good mechanical properties, high temperature resistance and chemical stability, is light in weight and can be easily processed into various shapes. The brush head 44 is made of nylon material, which has good wear resistance, flexibility and chemical corrosion resistance, can adapt to a variety of waste liquid environments, and has less wear on the connecting plate 31. It is suitable for general industrial waste liquid injection systems, such as spray gun cleaning of common chemical wastewater, light oily wastewater, etc. When the cleaning brush 43 is used in conjunction with the brush head 44, the overall weight of the cleaning brush 43 can be reduced while ensuring a certain strength, and the load on the rotating shaft 40 can be reduced. It is suitable for most waste liquid spray guns in general to moderately harsh environments.

[0038] Six spiral blades 42 are fixedly installed at the rear end of the rotating shaft 40 and are distributed symmetrically with respect to the center. The spiral blades 42 are made of carbon fiber reinforced polymer (CFRP), a high-performance composite material. Carbon fiber has the advantages of high strength, low density and good corrosion resistance. After being compounded with a polymer matrix, the strength-to-weight ratio of the propeller can be significantly improved. Compared with traditional metal materials, such as aluminum alloy, the weight of the CFRP propeller can be reduced by 30% to 50% under the same strength requirement. This can not only reduce the inertial force of the propeller when rotating at high speed and reduce the load on the drive device, but also improve the overall control performance of the spray gun. At the same time, the CFRP material has good chemical stability to various waste liquids, can adapt to the working environment of different corrosive waste liquids, and extend the service life of the propeller.

[0039] The contour of the spiral blade 42 is designed with a composite curve so that it has a larger radius of curvature near the root to provide sufficient strength and torque transmission capability, ensuring that the propeller can stably drive the cleaning brush 43 to rotate and promote the flow of waste liquid. At the tip of the blade, the radius of curvature gradually decreases and transitions to a sharper shape. This can reduce the air or waste liquid resistance at the tip during high-speed rotation, improve the efficiency of the rotating shaft 40 and the spiral blade 42, and at the same time give the blade a certain twist angle, which gradually increases from the root to the tip, so that the angle of attack of the blade at different radii can better match the flow direction of the waste liquid, reduce the generation of vortices, and improve the propulsion efficiency of the spiral blade 42.

[0040] After long-term use, the nozzle 30 and the filter short tube 20 can be removed from both ends of the gun body 10, and cleaning liquid can be added to the gun body 10. Then, the two ends of the gun body 10 are threadedly connected to matching sealing covers, so that the two ends of the gun body 10 are sealed. At this time, the motor 11 is started to drive the rotating shaft 40 to rotate, so that the rotating shaft 40 will drive the spiral blades 42 to clean the oil and other impurities in the gun body 10. After a suitable time, the sealing cover is removed and the waste liquid is poured out, so as to realize daily cleaning of the inside of the gun body 10, which is beneficial to prolonging the service life of the gun body 10 and the cleaning components.

[0041] The nozzle 30 is connected to the gun body 10 by a thread. When installing, the connecting plate 31 of the nozzle 30 contacts the brush head 44 of the cleaning brush 43. With the help of the spring 47, the brush head 44 is tightly fitted to the connecting plate 31 for easy cleaning. The motor 11 outside the gun body 10 drives the rotating shaft 40 of the cleaning component through the bevel gear 41. The rotating shaft 40 drives the spiral blade 42 and the cleaning brush 43 to rotate. The head 44 of the cleaning brush 43 prevents the jet hole 32 from being blocked to ensure the normal injection of the waste liquid. The main body of the filter short tube 20 is made of stainless steel and has a filter inside. The net 22 and the sealing gasket 23 are tapered at one end to facilitate the removal of impurities and to facilitate cleaning and reuse. The cleaning brush 43 is made of polyetheretherketone and the brush head 44 is made of nylon material, which is suitable for a variety of waste liquid environments and reduces the weight load. The spiral blade 42 is made of carbon fiber reinforced polymer, and its composite curve design and twisting angle optimization improve the propulsion efficiency and stability. After long-term use, the nozzle 30 and the filter short tube 20 can be removed, cleaning liquid is added to the gun body 10 and sealed, and the motor 11 is started to clean the inside by the spiral blade 42.

[0042] The beneficial effects of the spray gun are remarkable, which can effectively enhance the cleaning effect, avoid clogging of the nozzle 30, and maintain stable spraying performance; facilitate the cleaning of the filter short tube 20 and reduce maintenance costs; the design of the cleaning brush 43 and the spiral blade 42 enables it to adapt to different waste liquids and extend the life of the components; the overall structure is convenient for assembly, disassembly and daily cleaning and maintenance, which improves the practicability, reliability and economy of the equipment, provides an efficient and convenient solution for industrial waste liquid treatment, and has broad application value.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning and anti-blocking waste liquid spray gun, comprising a spray gun and a cleaning component, characterized in that: The spray gun comprises a gun body (10) and a spray head (30); a short filter tube (20) is provided at the rear end of the gun body (10); a first connecting rod (13) is fixedly installed transversely inside the gun body (10); and a cleaning component is movably connected to the middle position of the first connecting rod (13); The cleaning assembly comprises a rotating shaft (40), a spiral blade (42) and a cleaning brush (43); six spiral blades (42) are fixedly mounted on the rear end of the rotating shaft (40) and are symmetrically distributed in the center; a movable clamping groove (46) is provided on the front end of the rotating shaft (40) and is symmetrically distributed in the center; a sliding fin matched with the movable clamping groove (46) is provided in the cleaning brush (43) and is movably connected with the movable clamping groove (46); a limiting rod (45) is fixedly mounted at the center position of the cleaning brush (43); a groove matched with the limiting rod (45) is provided in the rotating shaft (40); a spring (47) is provided in the groove; the limiting rod (45) is movably mounted in the groove, and the spring (47) is in contact with the limiting rod (45).

2. A self-cleaning and anti-clogging waste liquid spray gun according to claim 1, characterized in that: The nozzle (30) is located at the front end of the gun body (10), the inner diameter of the nozzle (30) is equal to the outer diameter of the gun body (10), the nozzle (30) and the gun body (10) are connected via threads, a first connecting tube (12) is fixedly mounted at the rear end of the gun body (10), the outer diameter of the first connecting tube (12) is equal to the inner diameter of the connecting end of the filtering short tube (20) and the first connecting tube (12), and the first connecting tube (12) and the filtering short tube (20) are connected via threads.

3. A self-cleaning and anti-clogging waste liquid spray gun according to claim 2, characterized in that: The filter short tube (20) is provided with a filter screen (22) and a sealing gasket (23). The sealing gasket (23) is located between the first connecting tube (12) and the filter screen (22) and is used to ensure the sealing performance when the filter short tube (20) is connected to the first connecting tube (12). The other end of the filter short tube (20) is a cone with a diameter increasing from the inside to the outside. A limiting ring (21) is provided between the tapered end and the filter screen (22).

4. A self-cleaning and anti-clogging waste liquid spray gun according to claim 1, characterized in that: The main body of the filtering short tube (20) is made of stainless steel, and the filtering screen (22) is made of stainless steel wire mesh with a thickness of 2-5 mm.

5. The self-cleaning and anti-clogging waste liquid spray gun according to claim 1, characterized in that: The nozzle (30) is fixedly mounted with a connecting plate (31), the connecting plate (31) is provided with jet holes (32) distributed symmetrically around the center, the jet holes (32) are connected to a nozzle (33) fixedly mounted on the connecting plate (31), and the nozzle (33) is conical.

6. The self-cleaning and anti-clogging waste liquid spray gun according to claim 1, characterized in that: A motor (11) is fixedly mounted on the outside of the gun body (10); the shaft of the motor (11) is located in the first connecting rod (13), and the shaft is connected to a gear (41) on a rotating shaft (40) in the spherical sealing connector (14) via a bevel gear (41).

7. The self-cleaning and anti-clogging waste liquid spray gun according to claim 1, characterized in that: The spiral blade (42) is made of carbon fiber reinforced polymer. The profile of the spiral blade (42) is designed with a composite curve. The area near the root has a larger radius of curvature. At the tip of the blade, the radius of curvature gradually decreases and transitions to a sharper shape. At the same time, the blade has a certain twist angle, which gradually increases from the root to the tip.

8. The self-cleaning and anti-clogging waste liquid spray gun according to claim 1, characterized in that: Three centrally symmetrical brush heads (44) are fixedly mounted on the front end of the cleaning brush (43); the cleaning brush (43) is made of polyetheretherketone material, and the brush heads (44) are made of nylon material.

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