A high pressure cleaning nozzle with an in-line booster

Abstract

The application relates to an in-line supercharged high-pressure cleaning nozzle which comprises, in sequence along the liquid flow ejection direction, a through liquid inlet hole, a channel I, a channel II, a channel III, a channel IV, a channel V and a liquid outlet hole, wherein the liquid inlet hole, the channel II, the channel IV and the liquid outlet hole are cylindrical holes with diameters of d4, d3, d2 and d1 respectively, d1<=d3<d2<=d4; the channel I, the channel III and the channel V are transition circular truncated cone holes; the liquid inlet hole is used for connecting a liquid source, and the liquid outlet hole is used for providing an outlet for the liquid. The technical scheme increases the jet stability without reducing the taper ratio of the nozzle outlet end, realizes the fluid flow uniformity, and is not prone to thermal fatigue.

Description

Technical Field

[0001] This invention belongs to the field of high-pressure cleaning nozzle technology, specifically relating to an embedded pressurized high-pressure cleaning nozzle. Background Technology

[0002] High-pressure nozzles are mainly used in the cleaning field. When connected to a high-pressure water pump for cleaning equipment, it is necessary to increase the water flow impact speed and coverage while ensuring the water output.

[0003] Traditional nozzle internal flow structures are mostly designed with a single tapering structure. This structure has a small tapering ratio, a steeper temperature gradient at the throat, a high risk of thermal deformation and thermal fatigue, and can also lead to jet divergence and pressure fluctuations, failing to achieve optimal high-pressure stable cleaning results. To solve this problem, traditional improvements include using high-temperature resistant materials to reduce thermal fatigue and extending the length of the tapering section to reduce the tapering angle.

[0004] The disadvantages of traditional improvement methods are that the resulting products are bulky, use a large amount of materials, and have high material costs, which leads to a higher overall cost of the product. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an embedded pressurized high-pressure cleaning nozzle that effectively improves the stability of nozzle cleaning in the high-pressure cleaning process without reducing the pipe tapering ratio, achieves uniform fluid flow in the cleaning process, effectively reduces the risk of thermal deformation, and reduces the overall cost of the product.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: An embedded pressurized high-pressure cleaning nozzle includes, in sequence along the liquid flow direction, a through inlet hole, channel I, channel II, channel III, channel IV, channel V, and an outlet hole. The inlet hole, channel II, channel IV, and outlet hole are all cylindrical holes with diameters d4, d3, d2, and d1, respectively, where d1≤d3<d2≤d4. Channel I, channel III, and channel V are all transition frustum holes. The inlet hole is used to connect to a liquid source, and the outlet hole is used to provide an outlet for the liquid.

[0007] Furthermore, the nozzle body includes a nozzle body and an insert. Channels IV, V, and the liquid outlet are disposed in the nozzle body. The nozzle body also includes an insert cavity that communicates with channel IV. The insert is fixedly embedded in the insert cavity. The liquid inlet, channel I, channel II, and channel III are all disposed in the insert.

[0008] Furthermore, the inner wall of the embedded cavity is provided with an internal thread A, and the outer periphery of the embedded body is provided with an external thread A. The embedded body is fixedly embedded in the embedded cavity by the screw connection between the external thread A and the internal thread A.

[0009] Furthermore, it also includes a screw-tightening aid for use with a wrench, pliers, or screwdriver.

[0010] Furthermore, the screwing auxiliary part is an outer hexagonal groove provided on the outer circumference of the nozzle body or an inner limiting groove provided on the nozzle body at one end away from the inlay. The inner limiting groove is one of an inner straight line, an inner cross, or an inner hexagon.

[0011] Furthermore, the nozzle body has an external thread B on its outer circumference near one end of the inlay for connection with a pipe.

[0012] Furthermore, d4=10mm, d3=3.8mm, d2=5mm, and d1=1.15mm.

[0013] The beneficial effects that this invention can achieve are as follows: based on the continuity equation of fluid flow and the principle of pipe contraction ratio, the internal flow structure of the nozzle is designed as a flow sequence of contraction, expansion, and then contraction again. Without reducing the contraction ratio at the nozzle outlet, the jet stability is increased, fluid flow uniformity is achieved, and thermal fatigue is less likely to occur. Attached Figure Description

[0014] Figure 1 This is a main sectional view of an embodiment of the present invention.

[0015] Figure 2 This is a left view of an embodiment of the present invention.

[0016] Figure 3 This is a front sectional view of the nozzle body in an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of a traditional single tapered nozzle.

[0018] In the figure: 1-nozzle body, 101-channel IV, 102-channel V, 103-liquid outlet, 104-internal thread A, 105-external thread B, 106-internal cavity; 2-Insertion, 201-Inlet hole, 202-Channel I, 203-Channel II, 204-Channel III, 205-External thread A; 3-Turning auxiliary part. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] An embedded pressurized high-pressure cleaning nozzle, such as Figure 1 As shown, it includes a nozzle body 1, an insert 2, and a screwing auxiliary part 3.

[0021] like Figure 1 and Figure 3 As shown, the nozzle body 1 has, from left to right, a through-hole 103, a channel V 102, a channel IV 101, and an inner cavity 106. Both the outlet hole 103 and the channel IV 101 are cylindrical holes. The diameter of the outlet hole 103 is d1 = 1.15 mm, and the diameter of the channel IV 101 is d2 = 5 mm. The channel V 102 is a transition frustum hole used to connect the outlet hole 103 and the channel IV 101. The inner wall of the inner cavity 106 is provided with an internal thread A104.

[0022] like Figure 1 As shown, the outer periphery of the insert 2 is provided with an external thread A205. The insert 2 is fixedly embedded in the inner cavity 106 by the screw connection between the external thread A205 and the internal thread A104. The insert 2 is provided with through channels Ⅲ204, Ⅱ203, Ⅰ202 and liquid inlet 201 from left to right. Channel Ⅱ203 and liquid inlet 201 are both cylindrical holes. The diameter of channel Ⅱ203 is d3=3.8mm and the diameter of liquid inlet 201 is d4=10mm. Channel Ⅲ204 and channel Ⅰ202 are transition frustum holes. Channel Ⅲ204 is used to connect channel Ⅳ101 and channel Ⅱ203, and channel Ⅰ202 is used to connect channel Ⅱ203 and liquid inlet 201.

[0023] like Figure 1 and Figure 3 As shown, the screw-tightening auxiliary part 3 is located at the left end of the nozzle body 1. In this embodiment, the screw-tightening auxiliary part 3 is selected as an internal hexagonal groove for use with a hexagonal wrench. Of course, the screw-tightening auxiliary part 3 can also be an internal flat slot (for use with a flathead screwdriver) or an internal Phillips head slot (for use with a Phillips head screwdriver), or it can be an external hexagonal groove located on the outer circumference of the nozzle body 1 (for use with pliers). Those skilled in the art can flexibly choose according to actual needs.

[0024] like Figure 1 As shown, the nozzle body 1 has an external thread B105 on its outer circumference near the inner body 2 for connection to a pipe, which is connected to a liquid pump. Along the liquid flow direction, there are, in sequence, an inlet hole 201, channel I 202, channel II 203, channel III 204, channel IV 101, channel V 102, and an outlet hole 103. The inlet hole 201 connects to the liquid source, and the outlet hole 103 provides an outlet for the liquid. The screwing auxiliary part 3 does not affect the inflow and outflow of the liquid. The relationship between d4, d3, d2, and d1 only needs to satisfy d1≤d3<d2≤d4; those skilled in the art can select the specific dimensions according to actual needs.

[0025] The assembly method is as follows: First, insert the rubber column into the liquid inlet hole 201 of the insert 2 to tighten and fix the insert 2. Then, with the assistance of an internal hex wrench, thread the nozzle body 1 and the insert 2 together (internal thread A104 and external thread A205 are screwed together).

[0026] The installation method is as follows: With the assistance of an Allen wrench, connect the external thread B105 on the nozzle body 1 to the pipeline, thereby realizing the connection between the entire nozzle and the pipeline, and the pipeline is connected to the liquid pump.

[0027] The following is the well-known principle of the continuity equation for fluid flow: (1) in, The inlet flow velocity, The cross-sectional area of ​​the inlet. The outlet flow velocity, This represents the cross-sectional area of ​​the water inlet.

[0028] According to equation (1), we can obtain: (2) in, The diameter of the inlet. This refers to the diameter of the water outlet.

[0029] According to equation (2), we can obtain: (3) In this embodiment, the liquid input velocity of the liquid inlet 201 is V0. According to equation (3), the liquid flow velocity of the liquid inlet 103 can be calculated as follows: As can be seen, along the liquid flow direction, from the inlet hole 201 to the outlet hole 103, the diameter of each channel undergoes a process of gradually narrowing, gradually expanding, and then gradually narrowing again. Although the diameter changes in the middle, the flow rate at the outlet is still guaranteed compared with the traditional nozzle with a single gradually narrowing structure.

[0030] In addition, the formula for the pipe inner diameter taper ratio is: (4) In the formula: The inlet inner diameter (large end diameter) of the tapered section. This refers to the inner diameter of the tapered section outlet (diameter at the smaller end).

[0031] like Figure 4 As shown, the traditional single tapered nozzle structure =10mm, =1.15mm, tapering ratio is 0.115, such as Figure 1 As shown, the nozzle outlet section of this embodiment =5mm, =1.15mm, with a taper ratio of 0.23. It can be seen that the taper ratio of the outlet section of a conventional single taper structure nozzle is much smaller than that of the outlet section in this embodiment.

[0032] For the outlet section of a traditional single-tapered nozzle, the low taper ratio inside the nozzle leads to an increased taper angle, causing fluid separation at the wall surface, forming vortices and pressure fluctuations, resulting in jet divergence. Large-span direct taper nozzles exhibit significantly increased turbulence intensity in the outlet flow field of high-pressure water jet environments, leading to decreased jet stability. To address this issue, it is necessary to reduce the taper angle by extending the taper section length, increase the throat transition radius, and select high-temperature resistant materials (such as silicon nitride ceramics), thus increasing design costs.

[0033] In this embodiment, the high taper ratio at the inner end of the nozzle effectively improves the stability of nozzle cleaning during high-pressure cleaning, achieves uniform fluid flow during cleaning, effectively reduces the risk of thermal deformation, and lowers the overall product cost, making it suitable for high-pressure jet cleaning scenarios.

Claims

1. A built-in pressurized high-pressure cleaning nozzle, characterized in that: Along the direction of liquid flow ejection, there are sequentially through-holes including inlet (201), channel I (202), channel II (203), channel III (204), channel IV (101), channel V (102) and outlet (103). Inlet (201), channel II (203), channel IV (101) and outlet (103) are all cylindrical holes with diameters of d4, d3, d2 and d1 respectively, where d1≤d3<d2≤d4. Channel I (202), channel III (204) and channel V (102) are all transition frustum holes. Inlet (201) is used to connect to the liquid source, and outlet (103) is used to provide an outlet for the liquid.

2. The embedded pressurized high-pressure cleaning nozzle according to claim 1, characterized in that: The nozzle body includes a nozzle body (1) and an insert (2). The channel IV (101), channel V (102) and liquid outlet (103) are disposed in the nozzle body (1). The nozzle body (1) also includes an insert cavity (106) connected to the channel IV (101). The insert (2) is fixedly embedded in the insert cavity (106). The liquid inlet (201), channel I (202), channel II (203) and channel III (204) are all disposed in the insert (2).

3. The embedded pressurized high-pressure cleaning nozzle according to claim 2, characterized in that: The inner wall of the inner cavity (106) is provided with an internal thread A (104), and the outer periphery of the inner body (2) is provided with an external thread A (205). The inner body (2) is fixedly embedded in the inner cavity (106) by the screw connection between the external thread A (205) and the internal thread A (104).

4. The embedded pressurized high-pressure cleaning nozzle according to claim 2, characterized in that: It also includes a screw-tightening auxiliary part (3), which is used to match a wrench, pliers or screwdriver.

5. The embedded pressurized high-pressure cleaning nozzle according to claim 4, characterized in that: The screwing auxiliary part (3) is an outer hexagonal groove provided on the outer circumference of the nozzle body (1) or an inner limiting groove provided on the nozzle body (1) at one end away from the inlay (2). The inner limiting groove is one of an inner straight line, an inner cross, or an inner hexagon.

6. The embedded pressurized high-pressure cleaning nozzle according to claim 4, characterized in that: The nozzle body (1) has an external thread B (105) on the outer circumference near the inner body (2) for connecting to the pipe.

7. The embedded pressurized high-pressure cleaning nozzle according to claim 1, characterized in that: d4=10mm, d3=3.8mm, d2=5mm, d1=1.15mm.

Images