Spray gun with replaceable spray head for high-pressure cleaning machine

Abstract

The utility model provides a spray gun with a replaceable spray head for a high-pressure cleaning machine, which belongs to the technical field of high-pressure cleaning spray guns and comprises a butt joint seat arranged at a spray port of the spray gun and the spray head, a support column is fixedly connected to the end of the spray head far away from the spray port, a clamping wing is fixedly connected to the outer wall of the support column, and a wing-shaped insertion hole penetrating through an inner cavity is formed in the butt joint seat. The clamping wings penetrate through the wing-shaped inserting holes and then are rotationally clamped to the inner wall of the butt joint base, limiting bases used for limiting the rotating angles of the clamping wings are fixedly connected to the inner wall of the butt joint base, the positioning columns are moved away from the clamping wings through the positioning assemblies when the spray head is replaced, the clamping wings are unlocked, then the clamping wings are rotated, and the spray head is replaced. The clamping wings are rotated to the positions opposite to the wing-shaped clamping holes, and then the spray head is taken down and replaced, so that convenience is brought to the replacement process of the spray head, the spray head is replaced according to the use environment, the adaptability of different devices during cleaning is guaranteed, and the cleaning efficiency is improved while the outer surfaces of the devices are protected.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure cleaning spray gun technology, specifically a spray gun with a replaceable nozzle for a high-pressure cleaner. Background Technology

[0002] Industrial high-pressure cleaners are highly efficient cleaning devices used to remove stubborn dirt, oil stains, rust, and other contaminants. They achieve powerful cleaning through high-pressure water jets and are widely used in manufacturing, construction, automotive repair, food processing, and other industries. During the cleaning process, water is sprayed onto the equipment surface using a high-pressure spray gun, achieving the desired high-pressure cleaning effect.

[0003] The related technology (publication number: CN212702487U) discloses a high-pressure cleaner spray gun. The disclosed technical solution is that by setting a cover plate and a plug, the conversion between a single-hole nozzle and a multi-hole nozzle can be effectively realized; by setting a first threaded hole and a second threaded hole, the nozzle can be stably kept in a single-hole state.

[0004] The above-disclosed technical solutions reveal the following problems: the cleaning needs and working conditions vary for different equipment during cleaning. By changing different types of nozzles, the shape, pressure, and coverage of the water flow can be adjusted to achieve the best cleaning effect. In response, we propose a new type of spray gun with replaceable nozzles for high-pressure cleaners.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background section of this application, and therefore may include prior art information that does not constitute prior art information known to those skilled in the art. Utility Model Content

[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies. To address the issue of nozzle replacement in the prior art, this utility model provides a spray gun with a replaceable nozzle for a high-pressure washer. It employs a spray gun locking structure combined with a double-locking structure to facilitate nozzle replacement. The specific technical solution is as follows:

[0007] A spray gun with a replaceable nozzle for a high-pressure washer includes a docking seat and a nozzle disposed at the spray port of the spray gun. A support is fixedly connected to the end of the nozzle away from the nozzle opening. A snap-fit ​​wing is fixedly connected to the outer wall of the support. The docking seat has an wing-shaped insertion hole that penetrates the inner cavity. The snap-fit ​​wing passes through the wing-shaped insertion hole and is rotatably snapped onto the inner wall of the docking seat. A limiting seat for limiting the rotation angle of the snap-fit ​​wing is fixedly connected to the inner wall of the docking seat. A positioning component for locking the snap-fit ​​wing is provided on the inner wall of the docking seat.

[0008] In the above technical solution, the positioning component includes a positioning post slidably disposed on the inner wall of the docking seat, the snap-fit ​​wing is located between the positioning post and the limiting seat, and the positioning post is disposed in the inner cavity of the docking seat through an elastic reset member.

[0009] The elastic reset component includes a base fixed to the inner wall of the docking seat, a tension rod is provided through the inner cavity of the base, one end of the tension rod is connected to the positioning post, and the other end of the tension rod passes through the inner cavity of the base and the side wall of the docking seat and extends to the outside. A spring piece is provided between the base and the positioning post and sleeved on the outside of the tension rod.

[0010] The support column and the nozzle are connected by a connecting seat. The connecting seat has symmetrical connecting ears fixed on its outer circumferential wall. The inner cavity of the connecting ear is threaded with a fastening post. One end of the fastening post is attached to the outer wall of the connecting seat.

[0011] The fastening post is attached to the outer wall of the docking seat via a spherical seat.

[0012] The two positioning posts and the two limiting seats are arranged symmetrically about the center of the mating seat, and the two limiting seats and the two positioning posts are located on the same diameter.

[0013] Both the end of the snap-fit ​​wing and the surface of the positioning post are arc-shaped.

[0014] The outer wall of the docking seat at the end away from the nozzle has an external thread.

[0015] The nozzle has a spray pipe embedded in its inner cavity, and the spray pipe is recessed into the inner cavity of the support column.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the high-pressure cleaner uses a spray gun with replaceable nozzles.

[0017] 1. When replacing the nozzle, use the positioning component to remove the positioning post from the snap-fit ​​wing, thus unlocking the snap-fit ​​wing. Then rotate the snap-fit ​​wing to the position corresponding to the wing-shaped snap-fit ​​hole, and then remove the nozzle for replacement. This makes the nozzle replacement process convenient. The nozzle can be replaced according to the usage environment, thereby ensuring the adaptability when cleaning different equipment, and improving cleaning efficiency while protecting the outer surface of the equipment.

[0018] Second, by tightening the fastening pins, the fastening pins cause the ball seat to rotate and fit against the surface of the docking seat. The two fastening pins further fix the nozzle, making the nozzle doubly locked after installation, thus ensuring the stability of the nozzle during use.

[0019] Third, both the end of the snap-fit ​​wing and the surface of the positioning post are arc-shaped. The arc-shaped design reduces the friction of the contact surface, ensuring that the snap-fit ​​wing can stably slide past the positioning post and snap onto the inner wall of the arc-shaped limiting seat. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a spray gun with a replaceable nozzle for a high-pressure washer according to the present invention;

[0021] Figure 2 This is a cross-sectional view of the nozzle part of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the docking socket part of this utility model;

[0023] Figure 4 for Figure 2 Enlarged view of a portion at point A;

[0024] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Dating seat, 2-Nozzle, 3-Support column, 4-Snap-fit ​​wing, 5-Airfoil insertion hole, 6-Limit seat, 7-Positioning post, 8-Spray pipe, 9-External thread, 10-Connecting seat, 11-Connecting ear, 12-Fastening post, 14-Spherical seat, 15-Tension rod, 16-Base, 17-Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The following are specific implementation cases and appendices. Figure 1-4 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0027] A replaceable nozzle spray gun for a high-pressure washer includes a docking seat 1 and a nozzle 2 disposed at the spray port of the spray gun. A support column 3 is fixedly connected to the end of the nozzle 2 away from the nozzle opening, and a snap-fit ​​wing 4 is fixedly connected to the outer wall of the support column 3. Two wing-shaped snap-fit ​​wings 4 are symmetrically fixedly installed on the circumferential outer wall of the support column 3. The docking seat 1 has a wing-shaped insertion hole 5 that penetrates the inner cavity, and the snap-fit ​​wing 4 passes through the wing-shaped insertion hole 5 and is rotatably snapped onto the inner wall of the docking seat 1. The wing-shaped insertion hole 5 that penetrates the inner cavity is axially opened at the center position of the docking seat 1. The diameter and shape of the wing-shaped insertion hole 5 match the snap-fit ​​wing 4, so that the snap-fit ​​wing 4 passes through the wing-shaped insertion hole 5 and is snapped onto the inner wall of the docking seat 1. The support column 3 drives the spray pipe 8 to pass through the inner cavity of the docking seat 1.

[0028] A limiting seat 6 is fixedly connected to the inner wall of the docking seat 1 to limit the rotation angle of the snap-fit ​​wing 4. A positioning component for locking the snap-fit ​​wing 4 is provided on the inner wall of the docking seat 1. The limiting seat 6 is fixedly installed on the side surface of the docking seat 1 away from the nozzle 2 along the path of the snap-fit ​​wing 4 rotating circumferentially around the center of the docking seat 1. After the snap-fit ​​wing 4 passes through the docking seat 1, it rotates and the position of the snap-fit ​​wing 4 is limited by the limiting seat 6. Before passing the limiting seat 6, the snap-fit ​​wing 4 slides over the positioning post 7, so that the arc-shaped surface of the positioning post 7 is subjected to compressive force and generates elastic force.

[0029] When the snap-fit ​​wing 4 slides past the positioning post 7 and snaps into the inner wall of the limiting seat 6, the spring force of the spring piece 17 on the positioning component resets the positioning post 7, locking the snap-fit ​​wing 4 between the positioning post 7 and the limiting seat 6. When changing the nozzle, the positioning component removes the positioning post 7 from the snap-fit ​​wing 4, unlocking it. Then, the snap-fit ​​wing 4 is rotated to align with the wing-shaped locking hole 5. The nozzle 2 is then removed and replaced, making nozzle 2 replacement convenient. The nozzle 2 can be replaced according to the usage environment, ensuring compatibility with different cleaning equipment and improving cleaning efficiency while protecting the equipment's outer surface.

[0030] The positioning assembly includes positioning posts 7 slidably mounted on the inner wall of the docking seat 1, and locking wings 4 located between the positioning posts 7 and the limiting seats 6. The positioning posts 7 are mounted in the inner cavity of the docking seat 1 via elastic reset members. The two positioning posts 7 located on the circumferential rotation path of the locking wings 4 slide against the inner wall of the docking seat 1, and the positioning posts 7 are located adjacent to the limiting seats 6. The two positioning posts 7 and the two limiting seats 6 are symmetrically arranged with respect to the center of the docking seat 1.

[0031] It is worth noting that the elastic reset component includes a base 16 fixed to the inner wall of the docking seat 1. A tension rod 15 is provided through the inner cavity of the base 16. One end of the tension rod 15 is connected to the positioning post 7. The other end of the tension rod 15 passes through the inner cavity of the base 16 and the side wall of the docking seat 1 and extends to the outside. A spring piece 17 is provided between the base 16 and the positioning post 7 and sleeved on the outside of the tension rod 15.

[0032] The base 16 is vertically fixed to the inner wall of the docking seat 1 near the spray gun. The tension rod 15 is in a relatively vertical position with the base 16, so that one end of the tension rod 15 passes through the inner cavity of the base 16 and is vertically fixed to the outer wall of the positioning post 7, and the other end of the tension rod 15 extends through the side wall of the docking seat 1 to the outside. A limiting block is fixedly installed at the end of the tension rod 15 outside the docking seat 1 to prevent the tension rod 15 from sliding into the inner cavity of the docking seat 1. The two ends of the spring piece 17 are fixed to the opposite surfaces of the positioning post 7 and the base 16, respectively. The spring piece 17 is movably sleeved on the outer wall of the tension rod 15 through a through hole that penetrates the inner cavity.

[0033] Furthermore, the support column 3 and the nozzle 2 are connected via a connecting seat 10. Connecting ears 11 are symmetrically fixed to the outer circumferential wall of the connecting seat 10. A fastening post 12 is threaded into the inner cavity of the connecting ear 11, with one end of the fastening post 12 fitting against the outer wall of the connecting seat 1. The support column 3 and the nozzle 2 are vertically fixed to both sides of the connecting seat 10, and the two connecting ears 11 are symmetrically fixed to the outer circumferential wall of the connecting seat 10. A threaded through hole is formed in the inner cavity of the connecting ear 11. The fastening post 12 is a threaded post.

[0034] By tightening the fastening post 12, the fastening post 12 causes the ball seat 14 to rotate and fit against the surface of the docking seat 1. The two fastening posts 12 further fix the nozzle 2, making the nozzle 2 doubly locked after installation, thus ensuring the fixation of the nozzle 2 during use.

[0035] The fastening post 12 is fitted against the outer wall of the mating seat 1 via the ball seat 14. The ball seat 14 reduces the friction with the surface of the mating seat 1, making the locking process smoother.

[0036] Furthermore, the two positioning posts 7 and the two limiting seats 6 are arranged symmetrically and intersectingly with respect to the center of the mating seat 1, and the two limiting seats 6 and the two positioning posts 7 are all located on the same diameter. The two positioning posts 7 and the two limiting seats 6 are arranged symmetrically and intersectingly with respect to the center of the mating seat 1, with the two positioning posts 7 and the two limiting seats 6 on the same diameter line. This ensures the stability of the nozzle 2 after installation.

[0037] Both the end of the snap-fit ​​wing 4 and the surface of the positioning post 7 are arc-shaped. The arc-shaped design reduces the friction of the contact surface, ensuring that the snap-fit ​​wing 4 can stably slide past the positioning post 7 and snap onto the inner wall of the arc-shaped limiting seat 6.

[0038] Furthermore, the outer wall of the docking seat 1, away from the nozzle 2, is provided with an external thread 9. An internal thread is provided on the inner wall of the spray gun's spray port. The docking seat 1 is fixed to the spray gun's spray port by being threadedly connected to the external thread 9 on the circumferential outer wall of the nozzle 2. This makes the assembly and disassembly of the docking seat 1 more convenient.

[0039] The nozzle 2 has a spray pipe 8 embedded in its inner cavity, and the spray pipe 8 is recessed into the inner cavity of the support column 3. The spray pipe 8 passes through the inner cavity of the support column 3 and the inner cavity of the nozzle 2 in sequence. As the nozzle 2 is connected to the docking seat 1, the spray pipe 8 passes through the wing-shaped insertion hole 5 and is inserted into the spray nozzle of the spray gun, so that the nozzle 2 is connected to the spray pipe of the spray gun.

[0040] This embodiment describes a spray gun with a replaceable nozzle for a high-pressure cleaner. The working principle is as follows: when replacing the nozzle, the tension rod 15 is slid on the outer wall of the docking seat 1, so that the tension rod 15 drives the positioning pin 7 to move away from the locking wing 4, thereby unlocking the locking wing 4. Then, the locking wing 4 is rotated to the position opposite to the wing-shaped locking hole 5, and then the nozzle 2 is removed for replacement.

[0041] When installing the nozzle 2, the spray pipe 8 is connected to the docking seat 1 along with the nozzle 2, so that the spray pipe 8 passes through the wing-shaped insertion hole 5 and is inserted into the spray nozzle of the spray gun. Then, the locking wing 4 passes through the wing-shaped locking hole 5 and is rotated. When the locking wing 4 slides past the positioning post 7 and locks onto the inner wall of the limiting seat 6, the elastic force of the spring piece 17 causes the positioning post 7 to reset, so that the locking wing 4 is locked between the positioning post 7 and the limiting seat 6.

[0042] Then, tighten the fastening post 12, causing the fastening post 12 to rotate and fit against the surface of the docking seat 1, thereby further fixing the nozzle 2 through the two fastening posts 12.

[0043] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lance for a high-pressure washer with replaceable spray head, comprising a docking seat (1) arranged at the jetting port of the lance and a spray head (2), characterized in that: The end of the nozzle (2) away from the nozzle is fixed with a support column (3), the outer wall of the support column (3) is fixed with a clamping wing (4), the butt joint seat (1) is provided with a wing-shaped jack (5) penetrating the inner cavity, and the clamping wing (4) is rotated and clamped to the inner wall of the butt joint seat (1) after penetrating the wing-shaped jack (5), the inner wall of the butt joint seat (1) is fixed with a limiting seat (6) for limiting the rotation angle of the clamping wing (4), and the inner wall of the butt joint seat (1) is provided with a positioning assembly for locking the clamping wing (4).

2. A high pressure washer with a replaceable spray head according to claim 1, characterized in that: The positioning assembly comprises a positioning column (7) slidingly arranged on the inner wall of the butt joint seat (1), the clamping wing (4) is located between the positioning column (7) and the limiting seat (6), and the positioning column (7) is arranged in the inner cavity of the butt joint seat (1) through an elastic reset member.

3. A high pressure washer with a replaceable tip lance according to claim 2, characterized in that: The elastic reset member comprises a base (16) fixed to the inner wall of the butt joint seat (1), the inner cavity of the base (16) is provided with a stretch rod (15) penetrating through, one end of the stretch rod (15) is connected with the positioning column (7), the other end of the stretch rod (15) penetrates through the inner cavity of the base (16) and the side wall of the butt joint seat (1) in sequence and extends to the outside, and the base (16) and the positioning column (7) are provided with an elastic sheet (17) sleeved on the outside of the stretch rod (15).

4. A high pressure washer with replaceable tip lance according to claim 1, characterized in that: The support column (3) and the nozzle (2) are connected through a connecting seat (10), the circumferential outer wall of the connecting seat (10) is fixed with a connecting lug (11) symmetrically, the inner cavity of the connecting lug (11) is threadedly connected with a fastening column (12), and one end of the fastening column (12) is attached to the outer wall of the butt joint seat (1).

5. A high pressure washer replaceable tip lance according to claim 4, characterized in that: The fastening column (12) is attached to the outer wall of the butt joint seat (1) through a spherical seat (14).

6. A high pressure washer with a replaceable tip lance according to claim 2, characterized in that: The two positioning columns (7) and the two limiting seats (6) are cross-symmetrically arranged with the center of the butt joint seat (1), and the two limiting seats (6) and the two positioning columns (7) are located on the same diameter.

7. A high pressure washer replaceable tip lance according to claim 2, characterized in that: The end of the clamping wing (4) and the surface of the positioning column (7) are both arc surfaces.

8. A high pressure washer replaceable tip lance according to claim 1, characterized in that: The outer wall of the end of the butt joint seat (1) away from the nozzle (2) is provided with an external thread (9).

9. A high pressure washer replaceable tip lance according to claim 1, wherein: The inner cavity of the nozzle (2) is embedded with a spray pipe (8), and the spray pipe (8) is embedded in the inner cavity of the support column (3).

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