A high pressure cleaning lance with a pressure boosting extension nozzle

Abstract

The utility model provides a kind of booster extension nozzle of high-pressure cleaning spray gun, belongs to high-pressure cleaning accessory technical field, including the extension pipe fixed on the spray head, the end of extension pipe away from spray head is provided with threaded connector, the eccentric counterflow hole that makes its inside form vortex is opened symmetrically on the conical surface outer wall of conical flow guide cabin, water outlet is opened in the side of conical flow guide cabin towards spray head, two eccentric counterflow holes that communicate with inner cavity are opened in the conical surface of conical flow guide cabin, two eccentric counterflow holes are located on the both sides of central position and are in symmetrical position, when using spray gun, extension pipe is connected with spray gun by threaded connector, when using, water flow passes two eccentric counterflow holes so that water flow forms vortex inside conical flow guide cabin, vortex drives booster wheel rotation by transmission member, and water flow discharged from water outlet passes the drive of booster wheel, further improve water pressure.

Description

Technical Field

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

[0002] High-pressure cleaning spray guns, as the core component of high-pressure cleaning equipment, are widely used in automotive repair, industrial equipment rust removal, municipal sanitation, and building cleaning. The spray pressure, range, and sealing performance of the nozzle directly determine the cleaning efficiency and effect. In actual operations, to adapt to long-distance (such as high-altitude or deep-level) cleaning scenarios, it is often necessary to install an extension tube between the spray gun and the nozzle.

[0003] A high-pressure pipe extension connector is disclosed in the related technology (announcement number: CN218441113U). The disclosed technical solution is as follows: through the cooperation of the limiting protrusion and the elastic buckle, once the connector sleeve is installed on the connector body, it is equivalent to the elastic buckle having passed the limiting protrusion and abutting against the limiting protrusion. That is, at this time, the connector sleeve can only move in the direction of pushing open the first locking pin. When it is necessary to remove the connector sleeve, the elastic buckle can be pried open. At this time, the elastic buckle does not abut against the limiting protrusion, and the connector sleeve can be removed from the connector body.

[0004] The above-disclosed technical solutions reveal the following problems: existing extension nozzles are mostly "straight pipe" structures, which only extend the water flow delivery distance. However, when the high-pressure cleaning spray gun works through the extension pipe, there is a problem of water pressure attenuation at the end. Due to insufficient pressure, it becomes a low-pressure water flow, reducing cleaning efficiency. To address this, we propose a pressurized extension nozzle for the high-pressure cleaning spray gun.

[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 pressure boosting during cleaning in the prior art, this utility model provides a pressure-boosting extended nozzle for a high-pressure cleaning spray gun, employing a secondary pressure boosting structure combined with a pressure boosting wheel structure to achieve the effect of secondary pressure boosting. Its specific technical solution is as follows: A pressurized extension nozzle for a high-pressure cleaning spray gun includes an extension tube fixedly connected to a nozzle. The end of the extension tube away from the nozzle has a threaded interface. A pressurization chamber is embedded in the extension tube. A conical guide chamber is fixed inside the pressurization chamber. Eccentric convection holes are symmetrically opened on the outer wall of the conical surface of the conical guide chamber to form a vortex inside. A water outlet is opened on the side of the conical guide chamber facing the nozzle. A pressurization wheel is arranged between the water outlet and the nozzle, and the pressurization wheel rotates with the vortex inside the conical guide chamber through a transmission component.

[0007] In the above technical solution, the transmission component includes a turbine rotatably disposed on the inner wall of the conical guide chamber, and the turbine corresponds to the eccentric convection hole. A linkage shaft is rotatably connected to the inner wall of the conical guide chamber on the side away from the nozzle, and the linkage shaft passes through the side wall of the conical guide chamber and extends to the space between the water outlet and the nozzle. The turbine is sleeved on the outer wall of the linkage shaft, and the booster wheel is sleeved on the outer wall of the linkage shaft located outside the conical guide chamber.

[0008] An annular frame fixed to the inner wall of the extension tube is provided between the booster wheel and the nozzle, and the linkage shaft is rotatably mounted on the annular frame.

[0009] The outer wall of the threaded interface is connected to a tightening sleeve, and a double seal is provided between the tightening sleeve and the end of the threaded interface.

[0010] The dual sealing element includes a sealing female ring fixed to the outer wall of the threaded interface, the sealing female ring having an annular recess on the side facing the re-tightening sleeve, and a sealing female ring fixed to the outer wall of the re-tightening sleeve that engages with the annular recess.

[0011] The inner wall of the threaded interface is provided with an internal thread that mates with the spray gun.

[0012] The extension tube and the nozzle are connected by a thread.

[0013] The extension tube is a 15CrMo high-pressure tube.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. A conical guide chamber is installed in the pressurization chamber on the extension pipe. The symmetrical eccentric convection holes on the conical surface allow the high-pressure water flow to enter and form a strong vortex. When the vortex rotates in the conical guide chamber, it generates centrifugal force, which initially pressurizes the water flow. At the same time, the vortex drives the pressurization wheel to rotate through the transmission component. The pressurization wheel further applies thrust to the water flow discharged from the outlet, forming a dual effect of "initial pressurization by vortex + secondary pressurization by pressurization wheel".

[0015] 2. The re-tightening sleeve is threadedly connected to the threaded interface. Tightening the re-tightening sleeve can further compress the sealing mother ring and the sealing daughter ring, compensate for the wear of the sealing gap after long-term use, ensure long-term stable sealing performance, eliminate the need for frequent replacement of seals, and reduce maintenance costs.

[0016] Third, the ring frame between the booster wheel and the nozzle provides stable support for the linkage shaft, preventing the linkage shaft from shifting due to vibration during rotation, reducing wear on the turbine and booster wheel, and reducing the failure rate of transmission components from the traditional 25% to below 5%, further extending the overall service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pressurized extended nozzle of a high-pressure cleaning spray gun according to this utility model. Figure I ; Figure 2 This is a schematic diagram of the pressurized extended nozzle of a high-pressure cleaning spray gun according to this utility model. Figure II ; Figure 3 This is a cross-sectional view of the pressurization chamber portion of the present invention. Figure I ; Figure 4 This is a cross-sectional view of the pressurization chamber portion of the present invention. Figure II ; in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1-Extension pipe, 2-Threaded interface, 3-Pressure chamber, 4-Conical guide chamber, 5-Eccentric convection hole, 6-Water outlet, 7-Pressure wheel, 8-Turbine, 9-Linkage shaft, 10-Annular frame, 11-Re-tightening sleeve, 12-Sealing mother ring, 13-Annular insert, 14-Sealing daughter ring. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] A pressurized extension nozzle for a high-pressure cleaning spray gun includes an extension tube 1 fixedly connected to a nozzle. A threaded interface 2 is provided at the end of the extension tube 1 furthest from the nozzle. One end of the extension tube 1 is fixedly connected to an integrally formed threaded interface 2, and the other end of the extension tube 1 is threaded to the nozzle. The extension tube 1 is connected to the spray gun via the internal thread of the threaded interface 2. A pressurization chamber 3 is embedded in the extension tube 1, and a conical guide chamber 4 is fixed inside the pressurization chamber 3. The pressurization chamber 3 is a conical pipe, and the two parts of the extension tube 1 are respectively fixed to the two sides of the pressurization chamber 3, so that the pressurization chamber 3 and the connecting part of the extension tube 1 form an integral pipe. The conical guide chamber 4 is fixedly embedded inside the pressurization chamber 3, leaving a water flow space between the inclined surface of the conical guide chamber 4 and the inner wall of the pressurization chamber 3. The conical surface of the conical guide chamber 4 faces the threaded interface 2.

[0021] The conical guide chamber 4 has symmetrically arranged eccentric convection holes 5 on its conical outer wall to create vortices inside. A water outlet 6 is located on the side of the conical guide chamber 4 facing the nozzle. Two eccentric convection holes 5, communicating with the inner cavity, are located on the conical surface of the conical guide chamber 4, positioned symmetrically on either side of the center. A pressure booster 7 is installed between the water outlet 6 and the nozzle, and the pressure booster 7 rotates with the vortex inside the conical guide chamber 4 via a transmission component.

[0022] When using the spray gun, the extension tube 1 is connected to the spray gun through the threaded interface 2. During use, the water flow passes through two eccentric convection holes 5, causing the water flow to form a vortex inside the conical guide chamber 4. The vortex drives the booster wheel 7 to rotate through the transmission component. At the same time, the water flow discharged from the outlet hole 6 is driven by the booster wheel 7, which further increases the water pressure.

[0023] The transmission component includes a turbine 8 rotatably mounted on the inner wall of the conical guide chamber 4, and the turbine 8 corresponds to the eccentric convection hole 5. Water flowing into the conical guide chamber 4 from the eccentric convection hole 5 flows directly and symmetrically from both sides towards the turbine 8, causing the turbine 8 to rotate through convection. A linkage shaft 9 is rotatably connected to the inner wall of the conical guide chamber 4 on the side away from the nozzle, and the linkage shaft 9 passes through the side wall of the conical guide chamber 4 and extends to the area between the water outlet 6 and the nozzle. One end of the linkage shaft 9 rotates on the inner wall of the conical guide chamber 4 near the threaded interface 2, and the other end of the linkage shaft 9 passes through the side wall where the water outlet 6 is located and extends out of the conical guide chamber 4.

[0024] The turbine 8 is fitted onto the outer wall of the linkage shaft 9, and the booster wheel 7 is fitted onto the outer wall of the linkage shaft 9 located outside the conical guide chamber 4. The turbine 8 is located inside the conical guide chamber 4 and is fixedly fitted onto the outer wall of the linkage shaft 9, so that the booster wheel 7 located outside the conical guide chamber 4 rotates synchronously with the turbine 8. The convection formed after the water flows into the conical guide chamber 4 through the eccentric convection hole 5 drives the turbine 8 to rotate, which in turn drives the booster wheel 7 to rotate via the linkage shaft 9.

[0025] It is worth noting that an annular frame 10, fixed to the inner wall of the extension tube 1, is provided between the booster wheel 7 and the nozzle, and the linkage shaft 9 is rotatably mounted on the annular frame 10. The annular frame 10 supports the linkage shaft 9, ensuring the stability of the linkage shaft 9 during rotation.

[0026] Furthermore, the outer wall of the threaded interface 2 is connected to a tightening sleeve 11, and a double seal is provided between the tightening sleeve 11 and the end of the threaded interface 2. The double seal improves the sealing performance between the spray gun and the extension tube 1.

[0027] In addition, the double seal includes a sealing mother ring 12 fixed to the outer wall of the threaded interface 2. The sealing mother ring 12 has an annular recess 13 on the side facing the tightening sleeve 11, and a sealing daughter ring 14 fixed to the outer wall of the tightening sleeve 11, which engages with the annular recess 13. The sealing mother ring 12 has a U-shaped cross-section. After the sealing daughter ring 14 is inserted into the annular recess 13 of the sealing mother ring 12 along with the tightening sleeve 11, a double-layer sealing structure is formed.

[0028] Furthermore, the inner wall of the threaded interface 2 is provided with an internal thread for docking with the spray gun.

[0029] The extension tube 1 is threaded to the nozzle, which facilitates nozzle replacement.

[0030] Extension tube 1 is a 15CrMo high-pressure tube with a tensile strength of 440-640MPa. It has heat resistance and oxidation resistance to improve service life.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 pressurized extended nozzle for a high-pressure cleaning spray gun, characterized in that, The device includes an extension tube (1) fixed to the nozzle. The end of the extension tube (1) away from the nozzle is provided with a threaded interface (2). A pressurization chamber (3) is embedded in the extension tube (1). A conical guide chamber (4) is fixed in the inner cavity of the pressurization chamber (3). Eccentric convection holes (5) are symmetrically opened on the outer wall of the conical surface of the conical guide chamber (4) to form a vortex inside. A water outlet hole (6) is opened on the side of the conical guide chamber (4) facing the nozzle. A pressurization wheel (7) is provided between the water outlet hole (6) and the nozzle. The pressurization wheel (7) rotates with the vortex inside the conical guide chamber (4) through a transmission component.

2. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 1, characterized in that: The transmission component includes a turbine (8) rotatably disposed on the inner wall of the conical guide chamber (4), and the turbine (8) corresponds to the eccentric convection hole (5). The inner wall of the conical guide chamber (4) away from the nozzle is rotatably connected to a linkage shaft (9), and the linkage shaft (9) passes through the side wall of the conical guide chamber (4) and extends to the water outlet (6) and the nozzle. The turbine (8) is sleeved on the outer wall of the linkage shaft (9), and the booster wheel (7) is sleeved on the outer wall of the linkage shaft (9) located outside the conical guide chamber (4).

3. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 2, characterized in that: An annular frame (10) fixed to the inner wall of the extension tube (1) is provided between the booster wheel (7) and the nozzle, and the linkage shaft (9) is rotatably mounted on the annular frame (10).

4. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 1, characterized in that: The outer wall of the threaded interface (2) is connected to a tightening sleeve (11), and a double seal is provided between the tightening sleeve (11) and the end of the threaded interface (2).

5. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 4, characterized in that: The dual seal includes a sealing mother ring (12) fixed to the outer wall of the threaded interface (2), the sealing mother ring (12) having an annular recess (13) on the side facing the re-tightening sleeve (11), and a sealing daughter ring (14) fixed to the outer wall of the re-tightening sleeve (11) engaging with the annular recess (13).

6. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 1, characterized in that: The inner wall of the threaded interface (2) is provided with an internal thread that connects with the spray gun.

7. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 1, characterized in that: The extension tube (1) is threadedly connected to the nozzle.

8. The pressurized extended nozzle of a high-pressure cleaning spray gun according to claim 1, characterized in that: The extension tube (1) is a 15CrMo high-pressure tube.

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