Quick-connection type high-pressure cleaning machine extension spray rod

Abstract

The utility model provides a kind of quick-connection type high-pressure cleaning machine extension spray rod, belongs to high-pressure cleaning accessory technical field, including spray rod, the both ends of spray rod are respectively fixedly connected with the quick-connection male head and quick-connection female head that can be inserted, the inner wall of quick-connection male head is embedded and is provided with pre-tightening limiting part, the outer wall top of quick-connection female head is provided with the pre-tightening sliding slot for sliding through pre-tightening limiting part, the outer wall of quick-connection female head is sleeved with annular re-tightening part that is connected with the inner wall thread of quick-connection male head, when two spray rods are connected, quick-connection female head drives pre-tightening sliding slot to slide through the pre-tightening limiting part of the inner wall of quick-connection male head and then enters the inside of annular clamping groove, then pre-tightening limiting part is rotated to the position that is staggered with pre-tightening sliding slot, so that the pre-tightening of two spray rods, in this process, with the rotation of quick-connection male head makes the annular re-tightening part that is sleeved on the outer wall of quick-connection female head move towards quick-connection male head, by the interference fit between annular re-tightening part and the bottom of quick-connection male head, quick-connection male head and quick-connection female head are locked for the second time.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure cleaning accessories, specifically a quick-connect high-pressure cleaner extension spray bar. Background Technology

[0002] The spray boom serves as a bridge connecting the main unit of the high-pressure washer and the spray gun / nozzle. Its core function is to allow the operator to perform cleaning work from a safe, comfortable, and efficient distance. In high-pressure cleaning operations, extending the spray boom is a key component for achieving long-distance, large-area cleaning; its connection reliability and ease of operation directly affect work efficiency and safety.

[0003] A related technology (publication number: CN211726232U) discloses a spray bar extension rod for extending the spray bar. The disclosed technical solution involves the quick-connect plug on the spray bar passing through a locking ring in a locking plate when inserted into the internal slot of the quick connector on the spray bar extension rod. Under the tension of a locking spring, the pressure plate in the locking plate moves away from the spray bar, thereby moving the locking ring to lock the quick-connect plug of the spray bar securely in the internal slot of the quick connector. Therefore, it is evident that using this utility model of a spray bar extension rod can not only extend the length of the spray bar.

[0004] The above-disclosed technical solutions reveal the following problems: extension spray booms mostly use single threaded connections or snap-fit ​​connections. Threaded connections require repeated rotation for alignment, while snap-fit ​​connections, although slightly faster, lack a precise limiting structure and are prone to loosening due to insufficient insertion depth. Furthermore, disassembly requires prying the snap-fit ​​with tools, making the operation cumbersome. Especially in high-altitude operations or confined spaces, operators find it difficult to quickly assemble and disassemble the spray boom, severely hindering the work progress. In response, we propose a quick-connect high-pressure washer extension spray boom.

[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 problem of extended spray path in the prior art, this utility model provides a quick-connect high-pressure washer extension spray bar, which uses a quick-connect male spray bar connector combined with a quick-connect female spray bar connector to achieve the effect of sequential and rapid connection of the spray bars. The specific technical solution is as follows:

[0007] A quick-connect high-pressure washer extension spray bar includes a spray bar with quick-connect male and female connectors fixedly connected to its two ends. The male connector has a pre-tightening limiting member embedded in its inner wall. The female connector has a pre-tightening groove on its outer wall for sliding over the pre-tightening limiting member, and an annular groove on its outer wall for rotatably engaging with the pre-tightening limiting member. An annular re-tightening member is threaded onto the outer wall of the female connector and is threaded to the inner wall of the male connector. The contact surface between the annular re-tightening member and the male connector is locked by a feed-type interference fit.

[0008] In the above technical solution, an annular compression locking ring is fixedly connected to the annular fastener, and the top of the inner wall of the annular compression locking ring is provided with a compression slope, and the bottom of the outer wall of the quick connector is provided with a force-bearing inclined surface that is in contact with the compression slope.

[0009] The annular tightening member is a stepped annular member, and the extrusion slope is sleeved on the outside of the upper step and fixed to the top of the lower step.

[0010] The annular tightening member is detachably slidably disposed on the outer wall of the quick-connect female.

[0011] The inner wall of the annular fastener has a longitudinally penetrating groove, and the outer wall of the quick-connect female is fixed with a slider that is slidably disposed on the inner wall of the groove.

[0012] The inner wall of the quick-connect male connector is fitted with a limiting ring located above the pre-tightening limiting member, and a sealing gasket is provided on the side of the limiting ring that mates with the quick-connect female connector.

[0013] The quick-connect male has a stepped inner cavity, and the inner wall of the quick-connect male away from the spray bar has an internal thread.

[0014] The quick-connect female head has an internal thread on the inner wall of the side away from the spray bar.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The quick-connect female connector can slide directly over the pre-tightening limiter on the inner wall of the quick-connect male connector through the pre-tightening slide groove. Rotating the spray bar will cause the pre-tightening limiter to engage with the annular groove to achieve pre-positioning, eliminating the need for repeated alignment. Then, the annular re-tightening component engages with the thread of the quick-connect male connector to achieve secondary locking. The entire docking process can be completed by a single person within 30 seconds, which is more than 80% more efficient than traditional threaded connections. Moreover, no special tools are required, reducing the operating threshold.

[0017] 2. The annular re-tightening component is detachable through the sliding fit between the slide groove and the slider. When the spray bar needs to be connected with the cleaning machine or spray gun, the annular re-tightening component can be removed to avoid interference with the connection operation. At the same time, both the quick-connect male and quick-connect female connectors have internal threads on their inner walls, which can not only realize the quick splicing between spray bars, but also flexibly connect to equipment of different specifications (such as spray guns and cleaning machine interfaces with external threads), significantly improving compatibility and reducing the procurement cost of special accessories.

[0018] Third, the engagement of the pre-tightening limiter and the annular groove achieves initial fixation, while the threaded and interference fit of the annular re-tightening component and the quick-connect male achieves secondary locking, forming a "double anti-loosening" system. In particular, the annular extrusion locking ring on the annular re-tightening component contacts the force-bearing inclined surface of the quick-connect male through the extrusion slope. As the annular re-tightening component moves, the extrusion slope and the force-bearing inclined surface form an interference fit, further enhancing the locking force. Even in a high-frequency vibration environment, it can prevent the spray bar connection from loosening and ensure that the spray bar always maintains a stable spraying posture.

[0019] Fourth, easily damaged parts such as the annular tightening parts and sealing gaskets can be disassembled and replaced individually, without the need to replace the entire spray boom. When parts are worn or malfunction, only the corresponding parts need to be replaced, reducing maintenance costs by more than 60%. At the same time, the quick-connect male and quick-connect female are fixed by welding, which has high connection strength and can avoid the stripping problem of traditional threaded connections, thus extending the overall service life of the spray boom. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a quick-connect high-pressure washer extension spray bar according to the present invention;

[0021] Figure 2 This is a cross-sectional view of the structure of the two spray bars of this utility model when connected;

[0022] Figure 3 This is an exploded view of the structure of the quick-connect male and quick-connect female parts of this utility model;

[0023] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Spray bar, 2-Quick-connect male connector, 3-Quick-connect female connector, 4-Pre-tightening limiting component, 5-Annular groove, 6-Pre-tightening slide groove, 7-Annular re-tightening component, 8-Annular extrusion locking ring, 9-Extrusion slope, 10-Force-bearing inclined surface, 11-Slide groove, 12-Slider, 13-Limiting retaining ring, 14-Sealing gasket. Detailed Implementation

[0024] 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.

[0025] The following are specific implementation cases and appendices. Figure 1-3 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0026] A quick-connect high-pressure washer extension spray bar includes a spray bar 1, characterized in that: quick-connect male connector 2 and quick-connect female connector 3 are respectively fixedly connected to both ends of the spray bar 1. The quick-connect male connector 2 and quick-connect female connector 3 are respectively welded to both ends of the spray bar 1, so that both ends of the spray bar 1 are respectively sealed and connected to the interior of the quick-connect male connector 2 and quick-connect female connector 3. A pre-tightening limiting member 4 is embedded in the inner wall of the quick-connect male connector 2, and the pre-tightening limiting member 4 is fixedly embedded in the inner wall of the quick-connect male connector 2. The top of the outer wall of the quick-connect female connector 3 has a pre-tightening groove 6 for sliding over the pre-tightening limiting member 4, and the outer wall of the quick-connect female connector 3 has an annular groove 5 for rotatably engaging with the pre-tightening limiting member 4.

[0027] The pre-tightening limiting member 4 corresponds in shape to the pre-tightening slide 6 and the annular groove 5, allowing the pre-tightening limiting member 4 to slide past the pre-tightening slide 6 and enter the interior of the annular groove 5, with the pre-tightening slide 6 and the annular groove 5 connected. The outer wall of the quick-connect female connector 3 is fitted with an annular re-tightening member 7 that is threadedly connected to the inner wall of the quick-connect male connector 2, and the contact surface between the annular re-tightening member 7 and the quick-connect male connector 2 is locked by a feed-type interference fit.

[0028] When the two spray bars 1 are connected, the quick-connect female head 3 on one spray bar 1 is inserted into the quick-connect male head 2 of the other spray bar 1. This causes the quick-connect female head 3 to drive the pre-tightening groove 6 to slide past the pre-tightening limiting member 4 on the inner wall of the quick-connect male head 2 and enter the annular groove 5. At this time, the top of the quick-connect female head 3 is in contact with the sealing gasket 14. Then, the spray bar 1 where the quick-connect male head 2 is located is rotated, and the pre-tightening limiting member 4 is rotated to a position that is offset from the pre-tightening groove 6, so that the two spray bars 1 are pre-tightened. During this process, as the quick-connect male head 2 rotates, the annular re-tightening member 7 sleeved on the outer wall of the quick-connect female head 3 moves toward the quick-connect male head 2. Through the interference fit between the annular re-tightening member 7 and the bottom of the quick-connect male head 2, the quick-connect male head 2 and the quick-connect female head 3 are locked for the second time.

[0029] The annular fastener 7 is fixedly connected to an annular compression locking ring 8. The top of the inner wall of the annular compression locking ring 8 is provided with a compression slope 9, and the bottom of the outer wall of the quick-connect male connector 2 is provided with a force-bearing inclined surface 10 that contacts the compression slope 9. The contact slope between the compression slope 9 and the force-bearing inclined surface 10 reduces the resistance during the sliding process.

[0030] It is worth noting that the annular re-tightening member 7 is a stepped annular member, and the extrusion slope 9 is fitted onto the outside of the upper step and fixed to the top of the lower step.

[0031] The inner wall of the annular compression locking ring 8 has a circumferential extrusion slope 9. As the annular re-tightening member 7 moves, the extrusion slope 9 of the annular compression locking ring 8 moves toward the force-bearing inclined surface 10 and gradually forms an interference fit locking state.

[0032] In addition, the annular tightening member 7 is detachably slidably disposed on the outer wall of the quick-connect female 3.

[0033] The inner wall of the annular re-tightening member 7 is provided with a longitudinally penetrating groove 11, and the outer wall of the quick-connect female 3 is fixed with a slider 12 that is slidably disposed on the inner wall of the groove 11. The groove 11 is a longitudinally penetrating through groove. Through the sliding engagement of the slider 12 with the groove 11, the stability of the annular re-tightening member 7 during movement is prevented, and positional deviation is avoided.

[0034] When the spray bar 1 is connected to the corresponding equipment after docking, the slider 12 is slid out from the inner wall of the groove 11, thereby removing the annular fastener 7 from the outer wall of the quick connector 3 to avoid interference with the connection process.

[0035] In addition, a limiting ring 13 is embedded in the inner wall of the quick-connect male connector 2, located above the pre-tightening limiting member 4, and a sealing gasket 14 is provided on the side of the limiting ring 13 that mates with the quick-connect female connector 3. The sealing gasket 14 ensures the sealing performance after the connection between the spray bars 1.

[0036] Furthermore, the inner cavity of the quick-connect male connector 2 is stepped, and the inner wall of the quick-connect male connector 2 on the side away from the spray bar 1 is provided with internal threads.

[0037] The quick-connect female head 3 has an internal thread on the inner wall of the side away from the spray bar 1.

[0038] When the spray bar 1 is connected to the equipment or spray gun, the two ends of the spray bar 1 are connected by the internal threads of the quick-connect male connector 2 and quick-connect female connector 3. When the spray bars 1 are connected to each other, the quick-connect male connector 2 and quick-connect female connector 3 are connected to form a spray pipe of sufficient length between the spray bars 1.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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 quick-connect high-pressure washer extension spray bar, comprising a spray bar (1), characterized in that: The spray bar (1) is fixedly connected to two quick-connect male connector (2) and quick-connect female connector (3) respectively. The quick-connect male connector (2) has a pre-tightening limiting member (4) embedded in its inner wall. The quick-connect female connector (3) has a pre-tightening groove (6) on its outer wall top for sliding over the pre-tightening limiting member (4). The quick-connect female connector (3) has an annular groove (5) that rotates and engages with the pre-tightening limiting member (4). The quick-connect female connector (3) has an annular re-tightening member (7) that is threadedly connected to the inner wall of the quick-connect male connector (2). The contact surface between the annular re-tightening member (7) and the quick-connect male connector (2) is locked by a feed interference fit.

2. The quick-connect extension spray bar for a high-pressure washer according to claim 1, characterized in that: The annular re-tightening member (7) is fixedly connected to an annular extrusion locking ring (8). The top of the inner wall of the annular extrusion locking ring (8) is provided with an extrusion slope (9). The bottom of the outer wall of the quick connector (2) is provided with a force-bearing inclined surface (10) that is in contact with the extrusion slope (9).

3. The quick-connect extension spray bar for a high-pressure washer according to claim 2, characterized in that: The annular tightening member (7) is a stepped annular member, and the extrusion slope (9) is fitted onto the outside of the upper step and fixed to the top of the lower step.

4. The quick-connect extension spray bar for a high-pressure washer according to claim 1, characterized in that: The annular fastener (7) is detachably slidably disposed on the outer wall of the quick-connect female (3).

5. The quick-connect extension spray bar for a high-pressure washer according to claim 1, characterized in that: The inner wall of the annular fastener (7) is provided with a longitudinally penetrating groove (11), and the outer wall of the quick-connect female (3) is fixed with a slider (12) that is slidably disposed on the inner wall of the groove (11).

6. The quick-connect extension spray bar for a high-pressure washer according to claim 1, characterized in that: The inner wall of the quick-connect male connector (2) is fitted with a limiting ring (13) located above the pre-tightening limiting member (4), and a sealing gasket (14) is provided on the side of the limiting ring (13) that is connected to the quick-connect female connector (3).

7. The quick-connect extension spray bar for a high-pressure washer according to claim 1, characterized in that: The inner cavity of the quick-connect male connector (2) is stepped, and the inner wall of the quick-connect male connector (2) on the side away from the spray bar (1) is provided with internal threads.

8. The quick-connect extension spray bar for a high-pressure washer according to claim 1, characterized in that: The quick-connect female (3) has an internal thread on the inner wall of the side away from the spray bar (1).

Images