Filter screen assembly of high-pressure spray gun

Abstract

The utility model discloses a filter screen assembly of a high-pressure spray gun, which comprises a first metal cage, a second metal cage, a third metal cage and a fourth metal cage, the first metal cage is cylindrical, the periphery, the upper end and the lower end of the first metal cage are hollowed out, the hollowed-out part is covered by a filter screen, and the top end of the first metal cage is communicated with a mouthpiece assembly used for being connected with an external water pipe; the second metal cage is in a regular polygon prism shape, the periphery, the upper end and the lower end of the second metal cage are hollowed out, the axis of the first metal cage and the axis of the second metal cage coincide, the first metal cage is detachably arranged in an inner cavity of the second metal cage in a suspended mode, and the diameter of the first metal cage is smaller than that of an inscribed circle of the second metal cage. The hollow second metal cage is covered outside the first metal cage, and the two metal cages are both made of metal with the density larger than that of water, so that the cage can sink into water easily; when the filter screen assembly sinks to the bottom, the second metal cage touches the bottom, the first metal cage is in a suspended state at the water bottom, water flow can be easily sucked into the first metal cage from the hollowed-out position of the second metal cage, and the water inlet efficiency of the high-pressure spray gun is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water inlet of a high-pressure spray gun, in particular to a filter screen component of a high-pressure spray gun. Background Art

[0002] High-pressure spray guns are a common cleaning device used in a variety of fields, including automotive, industrial, and agricultural applications. They draw water from an external source through a built-in suction pump, pressurize it, and then spray it through a nozzle at the front of the gun, creating a powerful water jet that is used to clean dirt from surfaces.

[0003] To ensure the proper functioning of the suction pump and prevent large particles from entering the pump body and causing blockage or damage, a filter assembly is usually installed at the end of the water pipe connected to the pump. This filter assembly is usually placed at the bottom of a pool or other water container to ensure that the water sucked in by the suction pump is clean water that has been initially filtered.

[0004] Currently, most common filter assemblies on the market utilize a cylindrical design, primarily consisting of a plastic cylindrical cage and a filter screen mounted on its hollowed-out outer wall. This design offers advantages such as simplicity, low cost, and ease of installation. However, in practice, due to the inherently lightweight nature of the plastic material and the hollow structure within the cylindrical cage, the overall density of the filter assembly is less than that of water, making it difficult to sink to the bottom. This prevents the filter assembly from maintaining a stable underwater position, potentially preventing the suction pump from properly drawing sufficient water or even causing it to draw in air, severely impacting the performance of the spray gun.

[0005] In addition, when the filter assembly successfully sinks to the bottom of the water, it may be very close to the bottom or wall of the barrel, resulting in restricted water flow around the filter assembly, thereby reducing water flow and lowering the water intake efficiency of the high-pressure spray gun.

[0006] To this end, the present application specifically proposes a filter assembly for a high-pressure spray gun to solve the above technical problems. Utility Model Content

[0007] The main purpose of the utility model is to solve the above-mentioned deficiencies and provide a filter assembly for a high-pressure spray gun, which enables the filter assembly to easily sink to the bottom while ensuring the spacing between the filter assembly and the barrel body and barrel wall.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A filter assembly for a high-pressure spray gun, arranged at the end of an external water pipe of the spray gun, comprising:

[0010] The first metal cage is cylindrical in shape, hollowed out on all sides and at both ends, the hollowed-out part is covered by a filter mesh, and a nozzle assembly for connecting to the external water pipe is provided at the top; the second metal cage is regular polygonal in shape, hollowed out on all sides and at both ends, the axes of the first metal cage and the second metal cage coincide, the first metal cage is detachably suspended in the inner cavity of the second metal cage, and the diameter of the first metal cage is smaller than the diameter of the inscribed circle of the second metal cage.

[0011] Furthermore, a mounting plate is provided on the top of the second metal cage, and a plurality of connecting rods are evenly arranged around the mounting plate to connect the mounting plate and the second metal cage to form a whole, and a threaded through hole is opened on the mounting plate.

[0012] Furthermore, the nozzle assembly includes a tube body fixed and connected to the top of the first metal cage, an external thread provided on the outer wall of the tube body for screwing with the threaded through hole, and a quick-connector connected to the top of the tube body.

[0013] Furthermore, the nozzle assembly also includes an annular baffle fixedly arranged on the outer wall of the bottom of the tube body and adjacent to the bottom end of the external thread, and a locking nut screwed onto the external thread and abutting the top surface of the mounting plate. The annular baffle abuts the bottom surface of the mounting plate and cooperates with the locking nut to tighten the mounting plate.

[0014] Furthermore, a handle is fixedly provided on the bottom of the first metal cage.

[0015] Furthermore, the first metal cage and the second metal cage are both made of stainless steel.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. This invention covers the outside of the first metal cage with a hollow second metal cage. Both metal cages are made of metal with a density greater than that of water and can easily sink in water. When the filter assembly sinks to the bottom, regardless of whether the second metal cage touches the bottom or the wall with its bottom, side or other surface, the first metal cage will remain suspended at the bottom of the water. Water can be easily drawn into the first metal cage through the hollow portion of the second metal cage, ensuring the water inlet efficiency of the high-pressure spray gun.

[0018] 2. The utility model provides a connection assembly consisting of a mounting plate, a threaded through hole, an external thread, an annular baffle and a locking nut between the first metal cage and the second metal cage, so that the first metal cage can be firmly arranged in the second metal cage, making it easy to install and disassemble the first metal cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the installation position of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the bottom structure of the first metal cage according to an embodiment of the present invention.

[0024] In the figure: 1. External water pipe; 2. First metal cage; 3. Filter; 4. Nozzle assembly; 41. Tube body; 42. External thread; 43. Quick connector; 44. Annular baffle; 45. Locking nut; 5. Second metal cage; 6. Mounting plate; 7. Threaded through hole; 8. Handle. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] like Figure 1-4 As shown, the utility model provides a filter assembly for a high-pressure spray gun, which is arranged at the end of the external water pipe of the spray gun, including:

[0027] The first metal cage 2 is cylindrical, with its four sides and upper and lower ends hollowed out. The hollowed-out part is covered by a filter 3, and the top end is connected to a nozzle assembly 4 for connecting to an external water pipe 1;

[0028] The second metal cage 5 is in the shape of a regular polygonal column, hollowed out on all sides and at the upper and lower ends. The axes of the first metal cage 2 and the second metal cage 5 coincide with each other. The first metal cage 2 is detachably suspended in the inner cavity of the second metal cage 5. The diameter of the first metal cage 2 is smaller than the diameter of the inscribed circle of the second metal cage 5.

[0029] During use, after the nozzle assembly 4 is connected to the external water pipe 1, the main assembly body consisting of the first metal cage 2 and the second metal cage 5 is directly placed into the water. Since both metal cages are made of metal with a density greater than that of water, they can easily sink into the water. When the filter assembly sinks to the bottom, regardless of whether the second metal cage 5 touches the bottom or the wall with its bottom or side, the first metal cage 2 will be in a suspended state at the bottom of the water. Water can be easily sucked into the first metal cage 2 through the hollow part of the second metal cage 5, without affecting the water intake effect of the first metal cage 2, thereby ensuring the water intake efficiency of the high-pressure spray gun.

[0030] In one embodiment, a mounting plate 6 is provided at the top of the second metal cage 5. Multiple connecting rods are evenly arranged around the mounting plate 6, connecting the mounting plate 6 and the second metal cage 5 to form a single unit. The mounting plate 6 is provided with threaded through-holes 7. The nozzle assembly 4 includes a tube 41 fixed to and connected to the top of the first metal cage 2; external threads 42 provided on the outer wall of the tube 41 for threaded connection to the threaded through-holes 7; and a quick-connect connector 43 connected to the top of the tube 41.

[0031] With this design, the first metal cage 2 together with the nozzle assembly 4 is inserted from the bottom of the second metal cage 5, and the quick-connect connector 43 is passed through the threaded through hole 7 and the external thread 42 is screwed into the threaded through hole 7. The first metal cage 2 is fixed to the mounting plate 6 to achieve the positioning of the first metal cage 2 in the inner cavity of the second metal cage 5. A socket that cooperates with the quick-connect connector 43 is provided at the end of the external water pipe 1, which can realize quick disassembly and assembly between the external water pipe 1 and the first metal cage 2.

[0032] It is worth noting that the quick-plug connector 43 here is a common technology in the field of water pipe connection. It is extremely common in daily life and various shopping channels. It is mainly used to achieve a quick and sealed connection with the water pipe, which is convenient for disassembly and assembly, so it will not be described in detail here.

[0033] In one embodiment, the nozzle assembly 4 also includes an annular baffle 44 fixedly arranged on the outer wall of the bottom of the tube body 41 and adjacent to the bottom end of the external thread 42, and a locking nut 45 screwed onto the external thread 42 and abutting the top surface of the mounting plate 6. The annular baffle 44 abuts the bottom surface of the mounting plate 6 and cooperates with the locking nut 45 to tighten the mounting plate 6.

[0034] With this design, when installing the first metal cage 2 on the mounting plate 6, the external thread 42 is screwed into the threaded through hole 7 until the annular baffle 44 is pressed against the bottom surface of the mounting plate 6, and then the locking nut 45 is inserted from above the quick-connect connector 43, and the locking nut 45 is screwed onto the external thread 42 so that the locking nut 45 is pressed against the top surface of the mounting plate 6, thereby cooperating with the annular baffle 44 to clamp the mounting plate 6, preventing the external thread 42 and the threaded through hole 7 from rotating relative to each other during use, causing the first metal cage 2 to loosen or even detach from the second metal cage 5, thereby ensuring the stability of the first metal cage 2 fixed to the second metal cage 5.

[0035] When the first metal cage 2 needs to be disassembled to clean the filter 3, the first metal cage 2 can be removed from the second metal cage 5 by reversing the above installation process, which makes disassembly and assembly convenient.

[0036] In one embodiment, a handle 8 is fixedly provided on the bottom of the first metal cage 2 .

[0037] With this design, when the first metal cage 2 is inserted from the bottom of the second metal cage 5 and the external thread 42 is screwed to the threaded through hole 7, the handle 8 can be pinched by hand to rotate the first metal cage 2 and the second metal cage 5 relative to each other, thereby improving the convenience during operation.

[0038] In one embodiment, the first metal cage 2 and the second metal cage 5 are both made of stainless steel.

[0039] With this design, the first metal cage 2 and the second metal cage 5 will not rust even if they are immersed in water for a long time, thus avoiding adverse effects of rust on the use process.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their 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 at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A filter assembly for a high-pressure spray gun, arranged at the end of an external water pipe (1) of the spray gun, characterized in that: include: The first metal cage (2) is cylindrical, hollowed out on all sides and at both ends, the hollowed-out portion is covered by a filter (3), and a nozzle assembly (4) for connecting to the external water pipe (1) is provided at the top end; The second metal cage (5) is in the shape of a regular polygonal prism, with its four sides and upper and lower ends being hollowed out. The axes of the first metal cage (2) and the second metal cage (5) coincide with each other. The first metal cage (2) is detachably suspended in the inner cavity of the second metal cage (5). The diameter of the first metal cage (2) is smaller than the diameter of the inscribed circle of the second metal cage (5).

2. A filter assembly for a high-pressure spray gun according to claim 1, characterized in that: A mounting plate (6) is provided on the top of the second metal cage (5), and a plurality of connecting rods are evenly arranged around the mounting plate (6) to connect the mounting plate (6) and the second metal cage (5) to form a whole. A threaded through hole (7) is provided on the mounting plate (6).

3. A filter assembly for a high-pressure spray gun according to claim 2, characterized in that: The nozzle assembly (4) comprises a tube body (41) fixed and connected to the top of the first metal cage (2), an external thread (42) provided on the outer wall of the tube body (41) for screwing with the threaded through hole (7), and a quick-connect connector (43) connected to the top of the tube body (41).

4. A filter assembly for a high-pressure spray gun according to claim 3, characterized in that: The nozzle assembly (4) further includes an annular baffle (44) fixedly arranged on the outer wall of the bottom of the tube body (41) and adjacent to the bottom end of the external thread (42), and a locking nut (45) screwed onto the external thread (42) and abutting against the top surface of the mounting plate (6); the annular baffle (44) abuts against the bottom surface of the mounting plate (6) and cooperates with the locking nut (45) to press the mounting plate (6).

5. A filter assembly for a high-pressure spray gun according to claim 4, characterized in that: A handle (8) is fixedly provided on the bottom of the first metal cage (2).

6. The filter assembly of a high-pressure spray gun according to claim 1, characterized in that: The first metal cage (2) and the second metal cage (5) are both made of stainless steel.

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