nozzle

Abstract

The utility model relates to the field of nozzle provides a nozzle. The nozzle includes nozzle body, and the nozzle body has fluid inlet, fluid outlet and the internal passage of intercommunication fluid inlet and fluid outlet, sealing element, sealing element sets up in the internal passage, and sealing element includes sealing part, in no fluid pressure, sealing part and the inner wall circumferential contact of internal passage to close internal passage, when fluid enters from fluid inlet, fluid pressure acts on sealing element, makes sealing part at least partial deformation and separates with the inner wall of internal passage to open internal passage. The nozzle is sealed in no fluid, and the gap is not had, can effectively block liquid, the piece of entering, even in the complex working condition containing a large number of liquid or piece in machining, also can avoid the risk of backflow, ensure that the nozzle is long-term unobstructed, reduce the equipment downtime maintenance due to the blockage, improve nozzle use reliability.

Description

Technical Field

[0001] This utility model relates to the field of nozzles and provides a nozzle. Background Technology

[0002] In the field of machining, high-cleanliness processing scenarios place higher demands on nozzle performance. Traditional hollow nozzles use high-pressure gas for cleaning, which is effective in removing dust and impurities from object surfaces. However, their performance is limited when handling large amounts of liquid or debris. For example, when there is excessive liquid or debris inside the nozzle, these substances may flow back into the nozzle and even into connected systems, causing blockage or damage to the nozzle and related structures, severely affecting processing quality and equipment lifespan.

[0003] Traditional hollow open nozzle designs are simple, but they cannot effectively prevent external liquids or debris from entering the nozzle when no fluid is flowing. This is particularly problematic during processing, especially when handling large amounts of liquid or debris. Utility Model Content

[0004] This utility model provides a nozzle that tightly seals the internal channel when no fluid is flowing through it, and opens the channel when a certain pressure fluid is flowing through it, thereby effectively preventing external liquids or debris from entering and improving the cleaning performance and applicability of the nozzle.

[0005] This utility model embodiment provides a nozzle, including: A nozzle body having a fluid inlet, a fluid outlet, and an internal channel connecting the fluid inlet and the fluid outlet; A sealing element, wherein the sealing element is disposed within the internal channel, the sealing element comprising a sealing portion; When there is no fluid pressure, the sealing part comes into circumferential contact with the inner wall of the internal channel to close the internal channel; When fluid enters from the fluid inlet, the fluid pressure acts on the seal, causing the seal to deform at least partially and separate from the inner wall of the internal channel, thereby opening the internal channel.

[0006] According to an embodiment of this utility model, the sealing element is a flexible sealing element.

[0007] According to an embodiment of the present invention, the sealing part is in the shape of a flared mouth, and the opening edge of the flared mouth is in contact with the inner wall of the internal channel.

[0008] According to an embodiment of the present invention, a base is also included, the base being fixed to the internal channel, and the sealing element being installed on the base.

[0009] According to an embodiment of the present invention, the base has a conical middle section, which is used to reduce the cross-section of the internal channel from large to small.

[0010] According to an embodiment of the present invention, the base is provided with a through hole for fluid to pass through, and the fluid flows to the seal through the through hole.

[0011] According to an embodiment of the present invention, a sealing groove is provided on the outer peripheral wall of the base, and a sealing ring is provided in the sealing groove.

[0012] According to an embodiment of the present invention, the base and the seal are detachably connected by fasteners.

[0013] According to an embodiment of the present invention, the sealing element includes: The mounting part is connected to the base, and the outer diameter of the mounting part is smaller than the inner diameter of the internal channel to form a fluid flow gap between the mounting part and the inner wall of the internal channel. A sealing end, used to form the sealing portion.

[0014] According to an embodiment of the present invention, the internal channel portion of the nozzle body near the fluid outlet is conical, and the sealing portion contacts the inner wall of the conical internal channel portion.

[0015] The nozzle provided in this embodiment of the invention features a tightly circumferential contact between the sealing part and the inner wall of the channel. When there is no fluid, the sealing surface is intact and gapless, effectively preventing liquid and debris from entering. Even in complex working conditions involving large amounts of liquid or debris during machining, it avoids the risk of backflow, ensuring long-term unobstructed flow of the nozzle, reducing equipment downtime due to blockage, and improving nozzle reliability. When fluid is present, the fluid pressure drives the sealing part to deform uniformly, opening the channel for fluid passage. The deformation process is smooth and unimpeded, ensuring smooth fluid flow. After the fluid stops, the sealing part quickly resets its seal without the need for additional driving components, adapting to the frequent on / off requirements of intermittent cleaning in machining. Simultaneously, the conical middle section of the base guides fluid convergence, increasing fluid velocity and pressure concentration. Combined with evenly distributed through holes and fluid flow gaps, the fluid acts uniformly on the sealing element, ensuring reliable deformation of the sealing element and stable, impactful fluid pressure, guaranteeing that the cleaning effect meets the high cleanliness requirements of machining. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic front view of the nozzle provided by this utility model.

[0018] Figure 2 This is a schematic cross-sectional view of the nozzle provided by this utility model.

[0019] Figure 3 This is a schematic top view of the nozzle provided by this utility model.

[0020] Figure 4 This is a schematic bottom view of the nozzle provided by this utility model.

[0021] Figure label: 100. Nozzle body; 102. Fluid inlet; 104. Fluid outlet; 106. Internal channel; 108. Seal; 110. Base; 112. Through hole; 114. Sealing groove; 116. Sealing ring; 118. Sealing part. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] like Figures 1 to 4 As shown, this embodiment of the utility model provides a nozzle, comprising: The nozzle body 100 has a fluid inlet 102, a fluid outlet 104, and an internal channel 106 connecting the fluid inlet 102 and the fluid outlet 104. A sealing element 108 is disposed within an internal channel 106, and the sealing element 108 includes a sealing portion 118. When there is no fluid pressure, the sealing part 118 comes into circumferential contact with the inner wall of the internal channel 106 to seal the internal channel 106. When fluid enters from fluid inlet 102, fluid pressure acts on seal 108, causing seal 118 to deform at least partially and separate from the inner wall of internal channel 106, thereby opening internal channel 106.

[0024] According to the nozzle provided in this embodiment of the present invention, the sealing part 118 is in close circumferential contact with the inner wall of the channel. When there is no fluid, the sealing surface is intact and without gaps, which can effectively prevent liquid and debris from entering. Even in complex working conditions containing a large amount of liquid or debris in machining, it can avoid the risk of backflow, ensure long-term unobstructed flow of the nozzle, reduce equipment downtime and maintenance due to blockage, and improve the reliability of nozzle use. When there is fluid, the fluid pressure can drive the sealing part 118 to deform uniformly, opening the channel for fluid to pass through. The deformation process is smooth and without jamming. After the fluid stops, the sealing part 118 can quickly reset the seal without additional driving components, which is suitable for the frequent on-off requirements of intermittent cleaning in machining. At the same time, the conical middle section of the base 110 guides the fluid to converge, increasing the fluid velocity and pressure concentration. Combined with the uniformly distributed through holes 112 and the fluid flow gap, the fluid acts evenly on the sealing part 108, which not only ensures the reliable deformation of the sealing part 108, but also makes the ejected fluid pressure stable and the impact force strong, ensuring that the cleaning effect meets the high cleanliness requirements of machining.

[0025] Please continue reading Figures 1 to 4 The nozzle provided in this embodiment addresses the problems of backflow when traditional hollow nozzles in the machining field are not flowing with fluid, and the difficulty in achieving both cleaning and sealing. Through the coordinated structural design of the nozzle body 100, the sealing element 108, and the base 110, it achieves the functions of pressureless sealing to prevent backflow and pressure-adjustable fluid flow.

[0026] The nozzle body 100 is made of high-strength metal material, which has mechanical properties of being wear-resistant and resistant to fluid impact. The overall shape is a cylindrical upper part and a conical lower part. The upper part is cylindrical with a fluid inlet 102 on the upper end face; the lower part is conical with a fluid outlet 104 on the lower end face. The internal channel 106 runs through the fluid inlet 102 and the fluid outlet 104. The channel direction is adapted to the shape of the body. The upper part is a cylindrical channel and the lower part is a conical channel to ensure that the fluid flows smoothly without any dead corners in the channel.

[0027] The inner channel 106 of the main body has an annular stepped surface in the middle to provide a positioning reference for the base 110; the inner wall of the conical channel near the fluid outlet 104 is smoothed without protrusions or depressions to provide a uniform sealing contact surface for the sealing part 118.

[0028] The seal 108 is located in the lower conical region of the internal channel 106. It is made of flexible rubber and can undergo reversible deformation under fluid pressure, making it resistant to aging over long-term use. The seal 108 is a one-piece molded structure, including an mounting part and a sealing part 118.

[0029] The mounting part is cylindrical and located on the upper part of the seal 108. Its outer diameter is smaller than the inner diameter of the internal channel 106, forming an annular fluid flow gap between it and the inner wall of the internal channel 106. The mounting part has a mounting hole in the center and is detachably connected to the base 110 by fasteners to ensure that the seal 108 is fixed and stable and easy to replace.

[0030] The sealing part 118 is in the shape of a flared mouth and is located at the lower part of the sealing element 108, with the opening facing the fluid outlet 104. The opening edge of the flared mouth is a continuous annular structure without any breaks. When there is no fluid pressure, the opening edge is in close contact with the conical inner wall of the internal channel 106 circumferentially due to the elasticity of the sealing element 108 itself, completely sealing the internal channel 106. When there is fluid pressure, the opening edge can separate from the inner wall as the sealing part 118 deforms, opening the channel.

[0031] The base 110 is a one-piece metal structure, fixed in the middle area of ​​the internal channel 106, and is stably fixed by a shoulder positioning method. The upper part of the base 110 is provided with an annular shoulder, and the upper end face of the shoulder is in close contact with the annular step surface inside the nozzle body 100, which restricts the base 110 from moving towards the fluid outlet 104. The outer peripheral wall of the base 110 is tightly fitted with the inner wall of the internal channel 106 without any loose gaps.

[0032] The middle section is a conical section, which makes the cross-section of the internal channel 106 decrease from large to small, guiding the fluid to converge towards the center; multiple through holes 112 are evenly distributed in the upper part, allowing the fluid to pass through and flow to the seal 108; an annular sealing groove 114 is opened on the outer peripheral wall.

[0033] When no fluid enters from the fluid inlet 102 under no-fluid pressure conditions, the sealing part 118 of the seal 108 maintains its initial shape by its own elasticity. The opening edge is in close contact with the conical inner wall of the internal channel 106, forming a complete annular sealing surface, which completely seals the internal channel 106. This prevents external liquids and debris from entering the internal channel 106 through the fluid outlet 104, thus avoiding nozzle blockage or damage to the connection structure.

[0034] After the fluid supply stops, the pressure acting on the sealing part 118 disappears, and the sealing part 108 returns to its initial shape under its own elasticity. The opening edge of the sealing part 118 re-makes tight contact with the conical inner wall of the internal channel 106, closes the internal channel 106, and re-enters the anti-backflow mode.

[0035] According to an embodiment of the present invention, the sealing element 108 is a flexible sealing element 108.

[0036] In one embodiment of this utility model, the flexible seal 108 is made of rubber, which has good elasticity and deformation capacity. It can undergo reversible deformation under fluid pressure and is not prone to aging or hardening after long-term use. The flexible seal 108 is integrally integrated into the sealing part 118 and installed in the internal channel 106 of the nozzle body 100. Its shape is adapted to the orientation of the internal channel 106 and does not obstruct the normal flow of fluid.

[0037] When there is no fluid pressure, the flexible seal 108 maintains its initial shape due to its own elasticity, and the sealing part 118 tightly fits the inner wall of the internal channel 106. When fluid enters from the fluid inlet 102, the fluid pressure acts on the force-bearing surface of the flexible seal 108, causing the sealing part 118 to undergo elastic deformation, detaching from the inner wall of the internal channel 106 to form a channel for fluid passage. After the fluid supply stops, the flexible seal 108 returns to its initial shape under its own elasticity, and the sealing part 118 closes the inner wall again, closing the internal channel 106. The material properties of the flexible seal 108 ensure that it does not crack or break during repeated deformation, making it suitable for long-term and frequent use scenarios.

[0038] The elasticity of the flexible material allows the sealing part 118 to fit tightly against the inner wall of the channel, achieving a reliable seal when there is no fluid and preventing liquid or debris from flowing back in. At the same time, the flexibility allows the sealing part 118 to easily deform under fluid pressure, opening the channel to allow fluid to pass through without the need for additional mechanical drive components, simplifying the structure while ensuring functional integrity.

[0039] Rubber material has the characteristics of wear resistance and resistance to certain temperatures, and can work stably in machining scenarios containing liquids or debris, avoiding sealing failure caused by rigid seal 108 being unable to deform or easily worn; the characteristic of not being easily damaged by repeated deformation also extends the replacement cycle of seal 108 and reduces maintenance costs.

[0040] The flexible seal 108 deforms smoothly without forming sharp protrusions or dead corners, resulting in low resistance when fluid passes through. It can maintain stable pressure and flow rate, ensuring that the fluid ejected from the fluid outlet 104 has sufficient impact force, improving the cleaning effect on the object surface and meeting the cleanliness requirements of machining.

[0041] According to an embodiment of the present invention, the sealing part 118 is in the shape of a flared mouth, and the opening edge of the flared mouth is in contact with the inner wall of the internal channel 106.

[0042] In one embodiment of this utility model, the flared opening of the sealing part 118 faces the fluid outlet 104, and the edge of the opening is a continuous annular structure, which is in complete circumferential contact with the inner wall of the internal channel 106 without gaps or breaks. The sidewall of the flared opening is a smooth arc shape, which gradually expands outward from the root of the sealing part 118 towards the edge of the opening, ensuring that when there is no fluid, the edge of the opening can be tightly pressed against the inner wall of the channel by the elasticity of the sealing member 108 itself to form an annular sealing surface.

[0043] When fluid enters through fluid inlet 102 and acts on the inner wall of the flared opening, the fluid pressure pushes the sidewall of the flared opening to contract and deform towards the center. The opening edge then separates from the inner wall of the channel, forming an annular channel for fluid passage. After the fluid stops, the sidewall of the flared opening returns to its outwardly expanding shape under elastic action, and the opening edge re-fits the inner wall, closing the channel. The size of the flared opening is adapted to the internal channel 106, and the width of the opening edge ensures sufficient sealing area to prevent small debris from entering through contact gaps.

[0044] The continuous annular opening edge contacts the inner wall of the channel circumferentially, forming a complete sealing surface. Compared with a partial contact sealing structure, it can more comprehensively prevent liquids or debris from entering the internal channel 106. It is especially effective in preventing backflow of fine debris, avoiding nozzle blockage or damage to the connection structure.

[0045] The funnel-shaped inner wall provides a large force-bearing area for the fluid, allowing the fluid pressure to act evenly on the sidewall and drive the funnel to contract and deform synchronously, avoiding incomplete channel opening or fluid diversion caused by uneven local deformation; the smooth arc-shaped sidewall also reduces eddies when the fluid passes through, ensuring stable fluid flow.

[0046] The contact between the opening edge and the inner wall is a surface contact, which can disperse pressure and reduce local wear compared to line contact. Especially in working conditions containing a small amount of debris, it can reduce the risk of debris scratching the sealing surface and maintain good sealing performance even after long-term use.

[0047] According to an embodiment of the present invention, a base 110 is also included, which is fixed to the internal channel 106, and a sealing member 108 is installed on the base 110.

[0048] In one embodiment of this utility model, the base 110 is an integrally formed structure made of metal, which is adapted to the shape of the internal channel 106. It is fixed in the internal channel 106 by a shoulder positioning method. The upper part of the base 110 is provided with an annular shoulder. The upper end surface of the shoulder is in close contact with the stepped surface inside the nozzle body 100, which restricts the base 110 from moving towards the fluid outlet 104. The outer peripheral wall of the base 110 is in close contact with the inner wall of the internal channel 106 without loosening or shaking, ensuring that the fixed position is stable.

[0049] The upper part of the seal 108 is provided with a mounting groove that fits the base 110. The lower part of the base 110 is embedded in the mounting groove to form a positioning fit, preventing the seal 108 from shifting in the radial direction. The connection between the base 110 and the seal 108 does not require any additional complex structure; stable installation of the seal 108 can be achieved simply by embedding and positioning, while also facilitating the disassembly and replacement of the seal 108. The height design of the base 110 ensures that after the seal 108 is installed, the sealing part 118 can be precisely aligned with the sealing area of ​​the internal channel 106, without any positional deviation affecting the sealing effect.

[0050] The base 110 provides a stable mounting reference for the seal 108, preventing the seal 108 from radially shifting under fluid pressure or during long-term use. This ensures that the sealing part 118 is always aligned with the preset sealing area of ​​the internal channel 106, preventing sealing failure due to positional shift. It is especially suitable for cleaning requirements of high-precision machining.

[0051] The shoulder positioning and fixing method of the base 110 does not require complicated tools. During installation, simply push the base 110 into the internal channel 106 until the shoulder fits against the stepped surface. The seal 108 is installed by embedding in the mounting groove and can be easily removed during disassembly. Compared with welding or thread fixing, the replacement process of the seal 108 is greatly simplified and maintenance time is reduced.

[0052] The metal base 110 is fixed in the internal channel 106, which can enhance the channel's resistance to deformation. Especially in scenarios where fluid pressure passes through or external vibration occurs, it can reduce the deformation of the channel caused by pressure or vibration, indirectly ensuring the sealing fit between the seal 108 and the inner wall of the channel, and improving the overall structural reliability.

[0053] According to an embodiment of the present invention, the base 110 has a conical middle section, which is used to reduce the cross-section of the internal channel 106 from large to small.

[0054] In one embodiment of this utility model, the conical middle section of the base 110 is located in the central region of the base 110. The larger end of the cone faces the fluid inlet 102, and the smaller end faces the fluid outlet 104, so that the cross-section of the internal channel 106 gradually narrows from the fluid inlet 102 side to the fluid outlet 104 side, forming a smooth conical flow channel. The sidewall of the conical middle section is a continuous conical surface without protrusions or depressions, ensuring that the fluid can flow smoothly along the conical surface without stagnation or eddies.

[0055] After entering through fluid inlet 102, the fluid first flows through the upper part of the base 110, and then enters the conical flow channel in the middle section of the cone. As the cross-section gradually narrows, the fluid velocity gradually increases, and the pressure acts more concentratedly on the downstream seal 108. Simultaneously, the conical flow channel guides the fluid towards the center, preventing fluid dispersion and impact on the seal 108, ensuring uniform force distribution on the seal 108. The conical middle section is integrally formed with the upper and lower parts of the base 110, without any connecting gaps, preventing fluid leakage from gaps.

[0056] The tapered flow channel reduces the fluid cross-section, and according to the principles of fluid mechanics, the flow velocity will increase accordingly. The impact force when the fluid is ejected is stronger, resulting in a better cleaning effect on the object surface. At the same time, the concentrated fluid pressure can more efficiently drive the seal 108 to deform, ensuring that the channel opens smoothly. Even in scenarios with slightly lower fluid pressure, the seal 108 can be reliably driven.

[0057] The smooth conical surface guides the fluid to flow in a fixed direction, preventing the fluid from generating eddies or impacting the channel wall, reducing fluid energy loss, and ensuring that the fluid can reach the fluid outlet 104 with stable pressure and flow rate, without uneven cleaning effect caused by pressure fluctuations, and adapting to the cleaning stability requirements of machining.

[0058] The conical surface without protrusions or depressions ensures that the fluid has no dead corners and can carry away trace amounts of residual impurities in the flow area, reducing the risk of blockage caused by the accumulation of impurities near the base 110. Especially in working conditions containing a small amount of debris, it can maintain the flow channel for a long time and reduce the frequency of cleaning.

[0059] According to an embodiment of the present invention, the base 110 is provided with a through hole 112 for fluid to pass through, and the fluid flows to the seal 108 through the through hole 112.

[0060] In one embodiment of this utility model, a plurality of through holes 112 are evenly distributed in the upper region of the base 110. The through holes 112 penetrate the upper and lower end faces of the base 110, forming a channel for fluid to pass through. The distribution of the through holes 112 is in a ring array, evenly arranged around the central axis of the base 110, ensuring that the fluid can pass through the base 110 evenly from all directions to the seal 108, without local fluid concentration or gaps.

[0061] The inner wall of the through-hole 112 is smoothed to reduce resistance to fluid flow. The number and diameter of the through-holes 112 are designed according to the fluid flow requirements to ensure that the total flow area can meet the normal flow of fluid without causing pressure loss due to excessive throttling. After the fluid enters the internal channel 106 from the fluid inlet 102, it first diffuses to the annular area on the upper part of the base 110, and then flows downward evenly through multiple through-holes 112, acting on the force-bearing surface of the seal 108 and causing the seal 108 to deform.

[0062] The through holes 112 of the annular array allow fluid to flow evenly to the seal 108 from multiple directions. The fluid pressure is applied evenly to the force-bearing surface of the seal 108, avoiding uneven deformation of the seal 108 caused by excessive local stress. This prevents incomplete opening of the channel or damage to the seal 108 due to uneven deformation, and extends the service life of the seal 108.

[0063] The dispersed through-holes 112 divide the fluid into multiple small-flow streams, reducing the direct impact of a single large-flow fluid stream on the seal 108. Especially in high-pressure fluid scenarios, this can reduce the wear or deformation fatigue of the seal 108 caused by impact, indirectly extending the service life of the seal 108.

[0064] The total flow area of ​​the multiple through holes 112 is stable, the pressure loss is small when the fluid passes through, and the downstream fluid pressure can be maintained to ensure that the fluid pressure ejected from the fluid outlet 104 is uniform, the cleaning force on the object surface is consistent, and there is no situation of incomplete cleaning in some areas, which is suitable for the high-precision cleaning needs of machining.

[0065] According to an embodiment of the present invention, a sealing groove 114 is provided on the outer peripheral wall of the base 110, and a sealing ring 116 is provided in the sealing groove 114.

[0066] In one embodiment of this utility model, an annular sealing groove 114 is formed on the outer peripheral wall of the base 110. The sealing groove 114 is located below the upper shoulder of the base 110, and the cross-section of the groove is rectangular, with dimensions adapted to the sealing ring 116. The sealing ring 116 is made of oil-resistant and wear-resistant rubber. After being embedded in the sealing groove 114, the outer circumferential surface of the sealing ring 116 slightly protrudes from the outer peripheral wall of the base 110 and is in close contact with the inner wall of the internal channel 106 to form an annular seal.

[0067] According to an embodiment of the present invention, the base 110 and the seal 108 are detachably connected by fasteners.

[0068] In one embodiment of this utility model, the fastener is a metal screw, a threaded hole is provided at the lower center of the base 110, and a mounting hole adapted to the threaded hole is provided at the center of the seal 108. During connection, the screw passes through the mounting hole of the seal 108 and screws into the threaded hole of the base 110. After tightening, the seal 108 is tightly pressed against the lower end face of the base 110, forming a detachable fixed connection. The head of the screw is embedded in the mounting hole of the seal 108 and does not protrude from the surface of the seal 108, so as to avoid obstructing fluid flow or scraping the inner wall of the channel.

[0069] During disassembly, simply use a tool to unscrew the screws to remove the seal 108 from the base 110. Replace with a new seal 108 and then retighten the screws to complete the installation. The fasteners are made of the same material as the base 110, possessing good strength and corrosion resistance to prevent disassembly difficulties caused by rust during long-term use. There is only one screw, located in the center, ensuring that the seal 108 is evenly stressed and does not become loose in any area.

[0070] The detachable connection means that when the seal 108 is damaged, the entire base 110 does not need to be replaced; only the seal 108 needs to be replaced. This significantly reduces the cost of replacing parts during maintenance, especially when the seal 108 is a vulnerable part. This design can significantly reduce long-term operating costs.

[0071] The tightening action of the screws ensures that the seal 108 fits tightly against the base 110. Even under high-pressure fluid impact or equipment vibration, the seal 108 will not fall off the base 110, ensuring that the seal 108 is always in the preset working position and guaranteeing the stable realization of sealing and deformation functions.

[0072] According to an embodiment of the present invention, the sealing element 108 includes: The mounting part is connected to the base 110. The outer diameter of the mounting part is smaller than the inner diameter of the internal channel 106, so as to form a fluid flow gap between the mounting part and the inner wall of the internal channel 106. A sealing end, used to form a sealing part 118.

[0073] In one embodiment of this utility model, the mounting portion of the seal 108 is a cylindrical structure, located at the upper part of the seal 108, and connected to the lower part of the base 110 by fasteners. The outer diameter of the mounting portion is smaller than the inner diameter of the internal channel 106, forming an annular fluid flow gap between them. The width of the fluid flow gap is uniform and continuously distributed around the outer peripheral wall of the mounting portion, without any blockage or narrow areas, ensuring smooth fluid flow.

[0074] The sealing end is located at the lower part of the sealing element 108 and is shaped like a trumpet, forming a sealing part 118. The root of the sealing end is integrally formed with the lower end of the mounting part without any connecting gaps. Fluid enters the internal channel 106 of the nozzle body 100 through the through hole 112, passes through the conical area of ​​the base 110, then through the cylindrical area of ​​the sealing element 108, and reaches the trumpet-shaped surface of the sealing element 108, pushing the trumpet mouth to deform and opening the internal channel 106 to achieve flow.

[0075] The fluid flow gap provides an additional flow path for the fluid, which can carry away residual fluid or trace impurities around the seal 108, preventing impurities from accumulating between the mounting part and the inner wall of the channel and causing gap blockage. This ensures that the fluid can still pass smoothly after long-term use without affecting the function of the seal 108.

[0076] After the two fluids merge, they flow out from the gap between the sealed end and the inner wall of the channel, forming a more stable stream. The pressure is more uniform when sprayed, and the cleaning coverage of the object surface is wider. This avoids the local cleaning failure caused by a single stream and is suitable for the cleaning needs of complex surfaces in machining.

[0077] According to an embodiment of the present invention, the internal channel 106 portion of the nozzle body 100 near the fluid outlet 104 is conical, and the sealing portion 118 contacts the inner wall of the conical internal channel 106 portion.

[0078] In one embodiment of this invention, the internal channel 106 portion of the nozzle body 100 near the fluid outlet 104 has a cross-section that gradually narrows from the side near the sealing part 118 toward the fluid outlet 104, forming a conical structure. The inner wall of the cone is a smooth conical surface without protrusions or depressions. The flared shape of the sealing part 118 is adapted to this conical structure, and the opening edge of the sealing part 118 is in close circumferential contact with the inner wall of the cone, with the contact surface being an annular conical surface contact without gaps.

[0079] When there is no fluid, the opening edge of the sealing part 118 is tightly fitted to the conical inner wall by elasticity. The inner wall of the conical structure provides a certain support for the sealing part 118, enhancing the sealing effect. When the fluid pushes the sealing part 118 to deform, the opening edge slides slightly along the conical inner wall toward the fluid outlet 104 and then separates. The resulting channel cross-section is also conical, smoothly transitioning with the conical part of the internal channel 106, resulting in low resistance when the fluid passes through. After the fluid stops, the sealing part 118 returns to its original deformation, and the opening edge slides back to its initial position along the conical inner wall, re-fitting and sealing.

[0080] The conical inner wall contacts the conical surface of the sealing part 118. Compared with the planar contact of the cylindrical inner wall, the sealing surface fits better and can more effectively prevent liquids or debris from entering. It is especially effective against viscous liquids or fine debris, and has a significant anti-backflow effect, avoiding nozzle clogging or damage to the connection structure.

[0081] The conical inner wall provides guidance for the deformation and reset of the sealing part 118. When the sealing part 118 deforms, it slides along the inner wall to avoid displacement or twisting caused by lack of guidance, reduce local stress of the sealing part 118, and extend its service life. When reset, it can also accurately return to the initial sealing position without sealing failure caused by position deviation.

[0082] The tapered internal channel 106 and the tapered channel formed after the sealing part 118 are opened have a smooth transition. The flow rate can be continuously increased when the fluid passes through, and it has a stronger impact force and a more concentrated flow when it is ejected from the fluid outlet 104. It has a stronger ability to remove stains or debris from the surface of the object and is suitable for the high cleanliness requirements of machining.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A nozzle, characterized in that, include: The nozzle body (100) has a fluid inlet (102), a fluid outlet (104) and an internal channel (106) connecting the fluid inlet (102) and the fluid outlet (104). A sealing element (108) is disposed within the internal channel (106), and the sealing element (108) includes a sealing portion (118). When there is no fluid pressure, the sealing part (118) comes into circumferential contact with the inner wall of the internal channel (106) to close the internal channel (106). When fluid enters from the fluid inlet (102), the fluid pressure acts on the seal (108), causing the seal (118) to deform at least partially and separate from the inner wall of the internal channel (106) to open the internal channel (106).

2. The nozzle according to claim 1, characterized in that, The sealing element (108) is a flexible sealing element (108).

3. The nozzle according to claim 2, characterized in that, The sealing part (118) is in the shape of a flared mouth, and the opening edge of the flared mouth is in contact with the inner wall of the internal channel (106).

4. The nozzle according to any one of claims 1 to 3, characterized in that, It also includes a base (110) fixed to the internal channel (106), and a seal (108) installed on the base (110).

5. The nozzle according to claim 4, characterized in that, The base (110) has a conical middle section, which is used to reduce the cross-section of the internal channel (106) from large to small.

6. The nozzle according to claim 5, characterized in that, The base (110) is provided with a through hole (112) for fluid to pass through, and the fluid flows to the seal (108) through the through hole (112).

7. The nozzle according to claim 4, characterized in that, The outer peripheral wall of the base (110) is provided with a sealing groove (114), and a sealing ring (116) is provided in the sealing groove (114).

8. The nozzle according to claim 4, characterized in that, The base (110) and the seal (108) are detachably connected by fasteners.

9. The nozzle according to claim 8, characterized in that, The seal (108) includes: The mounting part is connected to the base (110), and the outer diameter of the mounting part is smaller than the inner diameter of the internal channel (106) to form a fluid flow gap between the mounting part and the inner wall of the internal channel (106). A sealing end, used to form the sealing portion (118).

10. The nozzle according to any one of claims 1 to 3, characterized in that, The nozzle body (100) has a tapered internal channel (106) portion near the fluid outlet (104), and the sealing portion (118) contacts the inner wall of the tapered internal channel (106) portion.

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