Small-caliber double-channel two-way nozzle

Abstract

The utility model relates to a small-caliber double-channel bidirectional nozzle, which comprises a nozzle main body, first to fifth main body sections and a double-fluid channel, wherein the first to fifth main body sections are arranged outside the nozzle main body; the diameters of the first to fifth main body sections are gradually reduced; the double-fluid channel is characterized in that a channel in a first main body section has a circular section, and the distance is A; the cross section of the channel in the second main body section is changed into an ellipse which is transversely shortened and longitudinally extended, and the distance is B (B is less than A); the third main body section maintains the oval section of the second section and the interval B; the first channel in the fourth main body section is changed into an ellipse which is shortened transversely and longitudinally, the second channel is changed into a circle, and the distance is C (C < B); the fifth main body section is provided with a flow dividing structure, the first water outlet channel is a curve bent channel, and the second water outlet channel is an inclined linear channel. Through the cooperation of four-stage section gradual change (circle-ellipse-special-shaped ellipse / circle) and distance gradual decrease (A-B-C), on the premise that the double-channel high-pressure cleaning performance is guaranteed, stepped reduction of the outer diameter size of the nozzle is achieved.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure cleaning nozzle technology, specifically a small-diameter dual-channel bidirectional nozzle. Background Technology

[0002] Existing high-pressure cleaning nozzles typically employ a single fluid channel design, allowing only a single nozzle to perform cleaning spraying operations at a single angle. To address this technical issue, the applicant's prior patent (publication number CN 104128272B) discloses a switchable dual-channel rapid cleaning nozzle and its switching method. This nozzle achieves bidirectional spraying functionality by incorporating dual fluid channels within a single nozzle body and setting spray nozzles at different angles at the ends of the channels. However, this patented technology has been found to have the following technical drawbacks in practical applications: Because two independent high-pressure fluid channels need to be simultaneously configured within a limited space, the overall size and material thickness of the nozzle body must be increased to ensure the nozzle's structural strength under high-pressure conditions. This results in a significantly larger external size than the standard nozzle of a conventional tool magazine holder, making it unsuitable for use with existing standard fixtures and significantly increasing material consumption and processing costs.

[0003] Therefore, there is an urgent need to develop a new nozzle structure that can maintain the dual-channel bidirectional injection function while reducing the size of the dual-channel nozzle. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a small-diameter dual-channel bidirectional nozzle to achieve the switching of the spray direction of a single nozzle, reduce the structural size of the dual-channel nozzle, and ensure the structural strength of the nozzle in high-pressure cleaning.

[0005] To achieve the above objectives, a small-diameter dual-channel bidirectional nozzle is designed, comprising a nozzle body. The nozzle body includes a first main body segment, a second main body segment, a third main body segment, a fourth main body segment, and a fifth main body segment arranged sequentially from top to bottom with decreasing diameters. It also includes a first fluid channel and a second fluid channel disposed within the nozzle body. The first and second fluid channels within the first main body segment have circular cross-sections, and the distance between them is A. The first and second fluid channels within the second main body segment have elliptical cross-sections that are shorter laterally and longer longitudinally compared to the first main body segment, and the distance between them is B, which is less than the distance A. The first and second fluid channels within the third main body segment have cross-sections that are shorter laterally and longer longitudinally compared to the first main body segment, and the distance between them is B, which is less than the distance A. The first fluid channel in the second main body section has an elliptical shape with constant horizontal and vertical lengths, and the distance between the first and second fluid channels is B. The first fluid channel in the fourth main body section is an elliptical shape with shorter horizontal and vertical lengths compared to the third main body section, and the second fluid channel in the fourth main body section is a circle with shorter horizontal and vertical lengths compared to the third main body section. The distance between the first and second fluid channels is C, which is less than the distance B. The fifth main body section has a first water outlet channel and a second water outlet channel connected to the first and second fluid channels respectively. The first water outlet channel is a curved, bent fluid channel, and the center lines of the top inlet and bottom outlet of the first water outlet channel have a 90° angle. The second water outlet channel is a straight fluid channel that is inclined to the central axis of the nozzle body.

[0006] Preferably, the present invention further includes: the first fluid channel and the second fluid channel within the first main body segment are divided into an upper part and a lower part; the upper part is provided with a first transition structure, the first transition structure being a curved, bent fluid channel that gradually approaches the central axis of the nozzle body from top to bottom; the lower part is a straight fluid channel; the cross-sections of the first transition structure and the straight fluid channel are circular cross-sections with a constant area, and the distance between the first fluid channel and the second fluid channel in the curved, bent fluid channel portion of the first main body segment gradually decreases.

[0007] Preferably, the present invention further includes: a raised step mechanism is provided around the upper part of the first main body section, and the first fluid channel and the second fluid channel of the curved and bent fluid channel section are arranged within the raised step structure.

[0008] Preferably, the present invention further includes: an open structure at the top of the first fluid channel and the second fluid channel within the first main body segment, wherein the cross-section of the open structure is a circular cross-section that is larger than the diameter of the first fluid channel and the second fluid channel.

[0009] Preferably, the present invention further includes: a second transition structure is provided at the junction of the first fluid channel and the second fluid channel at the junction of the first main body segment and the second main body segment, the second transition structure being divided into an upper part and a lower part; the upper part of the second transition structure is a smooth transition structure with a constant longitudinal length from top to bottom and a gradually decreasing transverse length from top to bottom; the lower part of the second transition structure is a smooth transition structure with a gradually increasing longitudinal length from top to bottom and a gradually decreasing transverse length; the distance between the first fluid channel and the second fluid channel remains constant in the upper part of the second transition structure, and the distance between the first fluid channel and the second fluid channel gradually decreases in the lower part of the second transition structure.

[0010] Preferably, the present invention further includes: a third transition structure is provided at the junction of the first fluid channel and the second fluid channel at the junction of the third main body segment and the fourth main body segment; the third transition structure is a smooth transition structure in which the longitudinal length gradually decreases from top to bottom and the transverse length gradually decreases; in the third transition structure, the distance between the first fluid channel and the second fluid channel gradually decreases.

[0011] Preferably, the present invention further includes a transition section with an inclined surface between the first main body segment, the second main body segment, the third main body segment, the fourth main body segment, and the fifth main body segment.

[0012] Preferably, the present invention further includes: the outer diameters of the first main body segment, the second main body segment, the third main body segment, the fourth main body segment, and the fifth main body segment are 13mm, 10mm, 8mm, 6mm, and 5mm, respectively; the diameter of the circular cross-section of the first fluid channel and the second fluid channel in the first main body segment is 3mm, and the spacing A is 2mm; the lateral length of the elliptical cross-section of the first fluid channel and the second fluid channel in the second main body segment is 2mm, the longitudinal length is 3.6mm, and the spacing B is 1.6mm; the lateral length of the elliptical cross-section of the first fluid channel and the second fluid channel in the third main body segment is 2mm, the longitudinal length is 3.6mm, and the spacing B is 1.6mm; in the fourth main body segment, the lateral length of the elliptical cross-section of the first fluid channel is 1.6mm, the longitudinal length is 1.7mm, the diameter of the circular cross-section of the second fluid channel is 1.6mm, and the spacing C is 0.8mm.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] The dual-channel integrated design adopts a layered fluid channel layout structure, which coaxially nests two independent high-pressure fluid channels within a single nozzle body. Through optimization of the fluid channel cross-sectional shape and differential wall thickness design, the overall outer diameter of the nozzle is compressed to the standard range of conventional single-channel nozzles while ensuring the integrity of the dual channels. This effectively solves the compatibility problem between the dual-channel nozzle and the tool magazine holder.

[0015] Structural reinforcement under high-pressure conditions is achieved through the synergistic effect of the curved guide section, the narrowing section, and the fluid channel with a constantly changing cross-section. This forms a multi-level pressure-resistant support structure in the fluid channel intersection area, enabling the nozzle body, even with reduced wall thickness, to withstand the impact of high-pressure fluid and preventing deformation or rupture of the fluid channel.

[0016] Standardized production compatibility: The nozzle's external contour dimensions are strictly matched to the standard tool holder interface for small diameters, allowing it to directly replace the standard single-channel nozzle in existing equipment without requiring additional modifications to the clamping mechanism to accommodate large-volume dual-fluid channel nozzles, thus reducing equipment modification costs. Attached Figure Description

[0017] Figure 1 This is a side perspective view of the present invention;

[0018] Figure 2 This is a front perspective view of the present invention;

[0019] Figure 3 This is a perspective view of the lower end of the nozzle body of this utility model;

[0020] Figure 4 ,yes Figure 1 Sectional view at point AA;

[0021] Figure 5 ,yes Figure 1 Sectional view at BB;

[0022] Figure 6 ,yes Figure 1 Sectional view at CC;

[0023] Figure 7 ,yes Figure 1 Sectional view at DD;

[0024] Figure 8 ,yes Figure 1 Sectional view at EE;

[0025] In the diagram: 1 Nozzle body, 2 Fluid channel, 201 First fluid channel, 202 Second fluid channel, 3 First water outlet channel, 301 Inlet, 302 Outlet, 4 Second water outlet channel, 5 First transition structure, 6 Second transition structure, 7 Third transition structure, 8 First main body section, 9 Second main body section, 10 Third main body section, 11 Fourth main body section, 12 Fifth main body section, 13 Open structure, 14 Stepped structure. Detailed Implementation

[0026] To make the purpose, principle, and structure of this utility model clearer, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0027] like Figures 1-8 As shown, this embodiment provides a small-diameter dual-channel bidirectional nozzle, including a nozzle body 1. The nozzle body 1 is composed of five main body sections with decreasing diameters, specifically including: a first main body section 8 with an outer diameter of 13mm, a second main body section 9 with an outer diameter of 10mm, a third main body section 10 with an outer diameter of 8mm, a fourth main body section 11 with an outer diameter of 6mm, and a fifth main body section 12 with an outer diameter of 5mm. The main body sections are connected by transition sections with inclined surfaces to form a continuous variable diameter structure.

[0028] The nozzle body 1 is provided with a first fluid channel 201 and a second fluid channel 202 arranged in parallel.

[0029] Within the first main body section 8, the circular cross-sectional diameter of both fluid channels 2 is 3mm, and the channel spacing A is 2mm. A raised stepped structure 14 is provided at the upper part of this section. A first transition structure 5 is provided at the upper part of the fluid channels 2 within the first main body section 8. This transition structure is a curved, bent channel that gradually converges towards the axis from top to bottom, causing the spacing between the two fluid channels 2 within the first main body section 8 to gradually decrease from the top to 2mm at the bottom. A cylindrical recessed opening structure 13 is provided at the top of the channel, and the opening structure 13 is used to communicate with a switching valve device of a dual-channel nozzle in the prior art.

[0030] Within the second main body section 9, the cross-sections of the two fluid channels 2 evolve into ellipses with a transverse dimension of 2 mm and a longitudinal dimension of 3.6 mm, and the distance between the two fluid channels 2 is B = 1.6 mm. A second transition structure 6, located at the junction, achieves a gradual change in the cross-sections of the fluid channels 2 between the first main body section 8 and the second main body section 9. The upper longitudinal length of the second transition structure 6 remains constant at 3 mm, while the transverse length gradually decreases to 2.8 mm. The lower longitudinal length of the second transition structure 6 gradually increases to 3.6 mm, while the transverse length gradually decreases to 2 mm. The distance between the fluid channels 2 within the second transition structure 6 gradually decreases from 2 mm at the top to 1.6 mm at the bottom.

[0031] The third main section 10 maintains the elliptical cross-sectional parameters of the second main section 9, and the distance between the two fluid channels 2 remains at B=1.6mm.

[0032] Within the fourth main body section 11, the first fluid channel 201 evolves into an ellipse with a transverse diameter of 1.6 mm and a longitudinal diameter of 1.7 mm, while the second fluid channel 202 becomes a circle with a diameter of 1.6 mm. The cross-section is gradually changed by the third transition structure 7 located at the junction of the third main body section 10 and the fourth main body section 11, and the channel spacing is reduced to C=0.8 mm.

[0033] The fifth main section 12 is equipped with a diversion structure: the first water outlet channel 3 is a curved bend channel with the top water inlet 301 and the bottom water outlet 302 forming a 90° angle; the second water outlet channel 4 is a straight inclined channel with a 30° angle to the axis.

[0034] The first transition section 5 is a curved bending structure with a constant cross-sectional area, gradually approaching the central axis of the nozzle body 2; the second transition structure 6 has a constant longitudinal length when the upper part gradually narrows laterally, and continues to narrow laterally when the lower part gradually increases in longitudinal length; the third transition structure 7 simultaneously reduces the longitudinal and transverse dimensions of both channels.

[0035] There are inclined transition surfaces with tilt angles between each main segment.

[0036] The deformation design of the second transition structure 6 allows the fluid channel 2 to gradually narrow laterally while expanding fully in the longitudinal direction, minimizing the impact of the narrowing of the fluid channel 2 on the flow rate of the high-pressure fluid. After the rapidly narrowing second transition structure 6, a third main body section 10 with no deformation at one end is set as a buffer to prevent sudden pressure changes in the fluid pressure and avoid nozzle damage caused by sudden pressure changes.

[0037] This embodiment achieves a gradually shrinking arrangement of dual fluid channels in a small space through a three-stage cross-section change and decreasing spacing design, combined with a specific transition structure. The specific dimensional parameters are optimized through fluid dynamics simulation to ensure that the fluids in the two channels form a cross jet at a predetermined angle in the final water outlet section. Furthermore, by changing the circular and elliptical cross-sections of the fluid channels, it is ensured that the smaller fluid channel 2 can withstand the impact of high-pressure fluid without causing breakage in some areas under high-pressure flushing. In addition, the continuous decreasing spacing and curved flow channels ensure that the high-pressure fluid does not generate excessive friction with the fluid channel 2, reducing the loss of high-pressure fluid in the nozzle and maximizing the retention of fluid pressure in the dual-channel bidirectional nozzle.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and novel concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A small-diameter dual-channel bidirectional nozzle, comprising a nozzle body, wherein the nozzle body comprises a first main body segment, a second main body segment, a third main body segment, a fourth main body segment, and a fifth main body segment arranged sequentially from top to bottom with decreasing diameters, characterized in that, It also includes a first fluid channel and a second fluid channel disposed within the nozzle body; The cross-sections of the first fluid channel and the second fluid channel within the first main body segment are both circular, and the distance between the first fluid channel and the second fluid channel is A; The cross-sections of the first fluid channel and the second fluid channel within the second main body section are both elliptical shapes that are shorter in the transverse direction and longer in the longitudinal direction compared to the first main body section. The distance between the first fluid channel and the second fluid channel is B, and the distance B is less than the distance A. The cross-sections of the first and second fluid channels within the third main segment are both elliptical shapes with constant transverse and longitudinal lengths compared to the second main segment. The distance between the first and second fluid channels is B. The first fluid channel in the fourth main body segment is an ellipse with a shorter lateral length and a shorter longitudinal length compared to the third main body segment. The second fluid channel in the fourth main body segment is a circle with a shorter lateral length and a shorter longitudinal length compared to the third main body segment. The distance between the first fluid channel and the second fluid channel is C, and the distance C is less than the distance B. The fifth main body section is provided with a first water outlet channel and a second water outlet channel that are respectively connected to the first fluid channel and the second fluid channel; the first water outlet channel is a curved bend fluid channel, and the center lines of the top water inlet and the bottom water outlet of the first water outlet channel have an angle of 90°; the second water outlet channel is a straight fluid channel that is inclined to the central axis of the nozzle body.

2. The small-diameter dual-channel bidirectional nozzle as described in claim 1, characterized in that, The first fluid channel and the second fluid channel within the first main body section are divided into an upper part and a lower part; The upper part is provided with a first transition structure, which is a curved, bent fluid channel that gradually approaches the central axis of the nozzle body from top to bottom; The lower part is a straight fluid channel; The first transition structure and the straight fluid channel have a circular cross-section with a constant area. The distance between the first fluid channel and the second fluid channel in the curved fluid channel section of the first main body gradually decreases.

3. A small-diameter dual-channel bidirectional nozzle as described in claim 2, characterized in that, The upper part of the first main body section is also surrounded by a raised step mechanism, and the first and second fluid channels of the curved and bent fluid channel section are set in the raised step structure.

4. A small-diameter dual-channel bidirectional nozzle as described in claim 1, characterized in that, The top of the first fluid channel and the second fluid channel within the first main body section is also provided with an open structure, the cross-section of which is a circular cross-section with a larger diameter than that of the first fluid channel and the second fluid channel.

5. A small-diameter dual-channel bidirectional nozzle as described in claim 1, characterized in that, At the junction of the first fluid channel and the second fluid channel, a second transition structure is provided, which is divided into an upper part and a lower part. The upper part of the second transition structure is a smooth transition structure with a constant longitudinal length from top to bottom and a gradually shortening transverse length; The lower part of the second transition structure is a smooth transition structure in which the longitudinal length gradually increases and the lateral length gradually decreases from top to bottom; The spacing between the first fluid channel and the second fluid channel in the upper part of the second transition structure remains unchanged, while the spacing between the first fluid channel and the second fluid channel in the lower part of the second transition structure gradually decreases.

6. A small-diameter dual-channel bidirectional nozzle as described in claim 1, characterized in that, At the junction of the first fluid channel and the second fluid channel, a third transition structure is provided; The third transition structure is a smooth transition structure in which the longitudinal length gradually decreases from top to bottom and the transverse length gradually decreases. In the third transition structure, the distance between the first fluid channel and the second fluid channel gradually decreases.

7. A small-diameter dual-channel bidirectional nozzle as described in claim 1, characterized in that, A transition section with an inclined surface is provided between the first main body segment, the second main body segment, the third main body segment, the fourth main body segment, and the fifth main body segment.

8. A small-diameter dual-channel bidirectional nozzle as described in claim 1, characterized in that, The outer diameters of the first main body segment, the second main body segment, the third main body segment, the fourth main body segment, and the fifth main body segment are 13mm, 10mm, 8mm, 6mm, and 5mm, respectively. The diameter of the circular cross-section of the first fluid channel and the second fluid channel within the first main body section is 3mm, and the spacing A is 2mm. The elliptical cross-sections of the first and second fluid channels within the second main section have a transverse length of 2 mm and a longitudinal length of 3.6 mm, with a spacing B of 1.6 mm. The elliptical cross-sections of the first and second fluid channels within the third main section have a transverse length of 2 mm and a longitudinal length of 3.6 mm, with a spacing B of 1.6 mm. Within the fourth main section, the first fluid channel has an elliptical cross-section with a transverse length of 1.6 mm and a longitudinal length of 1.7 mm, while the second fluid channel has a circular cross-section with a diameter of 1.6 mm and a spacing C of 0.8 mm.

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