阅读说明：本技术 喷嘴 (Nozzle with a nozzle body ) 是由 长尾武 泽崎富男 于 2021-05-19 设计创作，主要内容包括：本发明提供一种抑制从喷嘴孔喷射的喷流的紊乱的喷嘴。喷嘴(100)具有：具有中心轴(127)的轴体(102)；设置于轴体(102)的内部,沿着中心轴(127)延伸的导液路径(104)；以及配置于导液路径(104)的前端部,具有沿着在与中心轴(127)不同的方向上延伸的喷射轴线(122)而配置于液室(106)的前端部的喷嘴孔(108)的液室(106),喷嘴孔(108)具有：与液室(106)连接,朝向下游而直径变小的导入部(110)；以及与导入部(110)的下游连接,将液体向喷口(113)引导的导出部(112)。(The invention provides a nozzle which can restrain the turbulence of jet flow jetted from a nozzle hole. The nozzle (100) comprises: a shaft body (102) having a central axis (127); a liquid guide path (104) provided inside the shaft body (102) and extending along the central axis (127); and a liquid chamber (106) disposed at the distal end portion of the liquid guide path (104) and having a nozzle hole (108) disposed at the distal end portion of the liquid chamber (106) along an injection axis (122) extending in a direction different from the central axis (127), the nozzle hole (108) having: an introduction section (110) which is connected to the liquid chamber (106) and has a diameter that decreases toward the downstream; and a discharge section (112) connected to the downstream of the introduction section (110) and guiding the liquid to the nozzle (113).)

1. A nozzle, comprising:

a shaft body (102, 202, 302), the shaft body (102, 202, 302) having a central axis (127);

a liquid guide path (104) provided inside the shaft body (102, 202, 302), the liquid guide path (104) extending along the central axis (127); and

a liquid chamber (106, 206, 306), the liquid chamber (106, 206, 306) being disposed at a distal end portion of the liquid guide path (104), and having a nozzle hole (108, 208, 308) disposed at a distal end portion of the liquid chamber (106, 206, 306) along an injection axis (122) extending in a direction different from the central axis (127),

the nozzle hole (108, 208, 308) has:

an introduction section (110, 210), the introduction section (110, 210) being connected to the liquid chamber (106, 206, 306) and having a diameter that decreases downstream; and

and a discharge section (112, 212), wherein the discharge section (112, 212) is connected to the downstream side of the introduction section (110, 210) and guides the liquid to the nozzle (113, 213, 313).

2. The nozzle of claim 1,

the introduction portion (110, 210) has a curved cross section that is convex toward the inside in the radial direction.

3. The nozzle of claim 1,

the introduction part (110, 210) has a truncated cone shape.

4. The nozzle of claim 3,

the apex angle of the introduction section (110, 210) is 10 DEG to 60 DEG inclusive.

5. The nozzle according to any one of claims 1 to 4,

the lead-out part (112, 212) is cylindrical.

6. The nozzle according to any one of claims 1 to 5,

the liquid chamber (106, 206, 306) has an inlet plane (344a, 344b) perpendicular to the ejection axis (122) and on which the introduction section (110, 210) is arranged.

7. The nozzle according to any one of claims 1 to 6,

the shaft body (102, 202, 302) has an outlet plane (342a, 342b) perpendicular to the injection axis (122) and in which the nozzle (113, 213, 313) is arranged.

8. The nozzle according to any one of claims 1 to 7,

having a plurality of said liquid chambers (106, 206, 306),

one nozzle hole (108, 208, 308) is disposed in each liquid chamber (106, 206, 306).

9. The nozzle according to any one of claims 1 to 8,

the shaft body (102, 202, 302) is cylindrical,

the nozzle bores (108, 208, 308) are orthogonal to the central axis (127).

10. The nozzle of claim 8,

the nozzle holes (108, 208, 308) are arranged at equal intervals in the circumferential direction.

11. The nozzle according to any one of claims 8 to 10, further comprising:

a plate (228) divided into a plurality of said liquid chambers (106, 206, 306).

12. The nozzle according to any one of claims 1 to 11,

the height of the injection axis (122) from the bottom of the liquid chamber (106, 206, 306) is 0.5 to 2 times the diameter of the spout (113, 213, 313).

Technical Field

The present invention relates to a nozzle.

Background

A solution is proposed for a nozzle, said nozzle having: a nozzle body extending in a longitudinal direction; two guide grooves arranged in the nozzle main body; and two injection holes, the nozzle through the jet flow to remove the attachments (Chinese patent No. 103736607).

In the conventional nozzle, the jet flow jetted from the nozzle hole may be disturbed.

Disclosure of Invention

The purpose of the present invention is to suppress disturbance of a jet flow ejected from a nozzle hole.

A first aspect of the present invention is a nozzle having:

a shaft body having a central axis;

a liquid guide path provided inside the shaft body and extending along the central axis; and

a liquid chamber disposed at a distal end portion of the liquid guide path and having a nozzle hole disposed at a distal end portion of the liquid chamber along an injection axis extending in a direction different from the central axis,

the nozzle hole has:

an introduction portion connected to the liquid chamber and having a diameter that decreases toward a downstream; and

and a discharge section connected to a downstream of the introduction section and guiding the liquid to the nozzle.

The liquid is, for example, an aqueous cleaning liquid. The pressure of the liquid is, for example, 1.5MPa to 200 MPa. Cleaning includes deburring with high pressure jets. The deposit is, for example, swarf or oil.

The shaft body is, for example, substantially cylindrical. The outlet plane may also be disposed in relation to the shaft body slot. The outlet planes may be provided at equal intervals in the circumferential direction with respect to the shaft body.

The liquid guide path is, for example, substantially cylindrical. The liquid guide path may be a cylinder having a larger cross-sectional area than the liquid chamber. The inner diameter of the liquid guide path is 3-10 times of the spraying aperture. In addition, the length of the liquid guide path is 10-300 times of the nozzle diameter. The liquid chamber is, for example, a straight column. The cross-sectional shape of the liquid chamber is, for example, a circle, a sector, a semicircle, or an isosceles trapezoid. Preferably, the bottom of the liquid chamber is planar. The bottom of the liquid chamber may also have a projection. The convex portion may be convex toward the proximal end from the center or convex toward the distal end. The convex portion is, for example, a hemispherical surface or a conical surface. The inlet planes may be provided at equal intervals in the circumferential direction with respect to the liquid chamber. The inner diameter of the liquid chamber is 2-8 times of the diameter of the nozzle. For example, the length of the liquid chamber is 5 to 90 times of the orifice diameter.

The axis of injection is the centerline on the design of the jet. The ejection axis is disposed spaced apart from the liquid chamber bottom portion. Preferably, the ejection axis is arranged at least as far as the bottom of the liquid chamber by the ejection orifice diameter. The spraying aperture can be 0.5-2.5 mm. Here, the distance between the ejection axis and the bottom of the liquid chamber is referred to as the ejection axis height. Preferably, the injection axis intersects the shaft body central axis. The injection axis may be arranged to be inclined in the proximal direction or the distal direction with respect to the shaft body center axis. The injection axis may also be orthogonal to the shaft body central axis.

When the jet axis is orthogonal to the shaft body central axis and the jet axis height is 0.5 times or less the jet diameter, the distribution of the liquid stream flowing into the jet port is biased toward the base end of the nozzle. As a result, the liquid discharged from the discharge port becomes asymmetric, and the discharge flow is deflected and diffused in the nozzle axis direction. On the other hand, if the height of the ejection axis is 2 times or more the diameter of the ejection orifice, a vortex is likely to occur in the liquid chamber on the tip side of the ejection orifice. If the flow of the liquid in the liquid chamber is disturbed, the flow of the jet flow discharged from the nozzle is disturbed, and the liquid spreads. Therefore, preferably, the ejection axis height is 0.5 to 2 times the ejection orifice diameter.

The nozzle hole is arranged spaced apart from the liquid chamber bottom portion. Preferably, the nozzle hole is provided close to the bottom of the liquid chamber. The nozzle hole is arranged at least as long as the nozzle opening is separated from the bottom of the liquid chamber. The nozzle hole is circular in a cross-sectional view centered on the injection axis. The diameter of the introduction portion decreases toward the downstream. The introduction portion has, for example, a circular cross section and a curved longitudinal section that is convex toward the radially inner side. The introduction portion may have a truncated cone shape, for example.

The vertex angle of the introduction part, which is a truncated cone, is 10 to 60 degrees (inclusive), preferably 20 to 50 degrees (inclusive). The length of the introduction part is one third to one half of the diameter of the nozzle. Here, the length of the introduction portion refers to a distance from a position where the upstream end of the introduction portion is connected to the liquid chamber to a position where the downstream end of the introduction portion is connected to the lead-out portion. The lead-out portion is a cylinder centered on the injection axis. The length of the lead-out part is 1.25 to 3 times (including both ends) the length of the lead-in part. Here, the lead-out portion length is a distance from a position where the upstream end of the lead-out portion is connected to the lead-in portion to a position where the downstream end of the lead-out portion is connected to the outer surface of the shaft body. The spout may also be slotted relative to the shaft. The nozzle orifice may also expand as the nose portion advances downstream.

The introduction section alleviates a change in the cross-sectional area of the flow path from the liquid chamber to the nozzle hole, and suppresses a disturbance in the flow of the liquid in the lead-out section. At an apex angle of less than 10 degrees or more than 60 degrees, the variation in cross-sectional area is large. Since the liquid passes through the outlet, the flow of the liquid is regulated by the wall surface effect. When the length of the introduction portion is too long, the length of the discharge portion becomes short, and turbulence of the fluid inside the nozzle hole tends to remain. In addition, when the length of the lead-out portion is short, the change in the cross-sectional area is large, and the flow of the fluid is greatly disturbed.

The plurality of nozzle holes may be arranged at positions that are line-symmetrical with respect to the shaft body center axis. The injection axes of the plurality of nozzle holes may intersect each other on the same plane.

The plate is arranged at the bottom of the liquid chamber and extends along the central axis of the shaft body. The plate length is, for example, 1 to 6 times (including both ends) the orifice diameter, and preferably 2 to 4 times (including both ends) the orifice diameter. Here, the plate length refers to a length from an upper end of the plate to the bottom of the liquid chamber. The plate width is, for example, a length of one fourth to one eighth (including both ends) with respect to the liquid chamber diameter, preferably, a length of one fifth to one sixth (including both ends) with respect to the liquid chamber diameter. Here, the plate width refers to the length of the plate in the radial direction of the liquid chamber.

The plate separates the liquid chamber into two chambers. When the plate length is 1 time or less of the orifice diameter, the flow of the liquid in the liquid chamber is rather disturbed. When the plate length is 2 times or less the orifice diameter, the separation effect is reduced. If the plate length exceeds 4 times, the rectifying effect with respect to the increase in the plate length is reduced as compared with the case where the plate length is 4 times or less. When the plate length is 6 times or more, the change in the flow straightening effect due to the plate arrangement is small. On the other hand, if the plate length is long, the effective cross-sectional area of the entire nozzle is reduced. As the plate width increases, the effective cross-sectional area of the nozzle decreases. The plate width is preferably thin. The plate divides the liquid chamber into a plurality of liquid chambers having equal cross-sectional areas, respectively. The plate divides the liquid chamber into a first liquid chamber and a second liquid chamber, for example, line-symmetrically with respect to the shaft body center axis. One nozzle hole is provided in each of the first liquid chamber and the second liquid chamber.

Effects of the invention

According to the nozzle of the present invention, turbulence of the jet flow can be suppressed.

Drawings

Fig. 1 is a perspective view of a nozzle of the first embodiment.

Fig. 2 is a longitudinal sectional view of the nozzle of the first embodiment.

Fig. 3 is a perspective view of a nozzle of a second embodiment.

Fig. 4 is a longitudinal sectional view of the nozzle of the second embodiment.

Fig. 5 is a V-V sectional view of fig. 4.

Fig. 6 is a partially sectional perspective view of a nozzle of a third embodiment.

Fig. 7 is a longitudinal sectional view of the nozzle of the third embodiment.

Fig. 8 is a sectional view VIII-VIII of fig. 7.

Description of the symbols

100 nozzle

102 axle body

104 liquid guide path

106 liquid chamber

108 nozzle hole

110 introduction part

112 lead-out part

113 nozzle

Detailed Description

(first embodiment)

As shown in fig. 1 and 2, the nozzle 100 of the present embodiment includes a shaft 102, a liquid guide path 104, a liquid chamber 106, and a nozzle hole 108.

The shaft body 102 extends along a shaft body center axis (center axis) 127. The shaft body 102 is a stepped cylinder. The proximal end portion of the shaft body 102 has a larger diameter than the distal end portion. For example, the outer diameter of the proximal end of the shaft body 102 is 6mm to 12 mm.

The liquid guide path 104 is disposed inside the shaft body 102 and extends along the central axis 127. The liquid guiding path 104 has a circular cross section. The liquid guide path 104 has a reduced diameter portion 105. The reduced diameter portion 105 is located at the tip of the liquid guiding path 104, and has a conical shape with a diameter decreasing toward the downstream. For example, the inner diameter of the liquid guide path 104 is 4mm to 10 mm. For example, the length of the liquid guide path 104 is 50mm to 300 mm.

The liquid chamber 106 is connected to the reduced diameter portion 105 and extends along the central axis 127. The liquid chamber 106 is cylindrical. The diameter of liquid chamber 106 is smaller than the diameter of liquid guiding path 104. The liquid chamber 106 has a bottom 114 at a downstream-side front end. The bottom portion 114 has a convex portion 115 formed in a conical shape in the base end direction. For example, the inner diameter of the liquid chamber 106 is 2 to 5 mm. The length of the liquid chamber 106 is 40mm to 100 mm.

The nozzle hole 108 is located at a leading end portion of the liquid chamber 106. The nozzle bore 108 extends along an injection axis 122. At any position, the nozzle hole 108 has a circular cross section centered on the ejection axis 122. The nozzle hole 108 has an introduction portion 110, a discharge portion 112, and a discharge port 113. The axial height 120 is equal to the throat diameter 118. For example, the nozzle opening 118 is 0.9mm to 1.3 mm.

The introduction portion 110 is connected to the liquid chamber 106. The introduction portion 110 does not meet the bottom portion 114. The introduction portion 110 has a shape with a diameter decreasing toward the downstream. The introduction portion 110 has a truncated cone shape, for example. The length 126 of the introduction portion is, for example, one third of the orifice diameter 118.

The lead-out portion 112 is located downstream of the lead-in portion 110. The lead-out portion 112 is cylindrical. The lead-out length 124 is, for example, 1.25 times the lead-in length 126.

The nozzle 113 is an opening located on the outer surface of the shaft 102.

The liquid flowing into the nozzle 100 is ejected from the ejection port 113 through the liquid guide path 104, the liquid chamber 106, and the nozzle hole 108. The nozzle 100 generates a jet of a straight line rod flow. The diameter of the introduction portion 110 decreases gradually from the liquid chamber 106 to the discharge portion 112. As a result, turbulence of the flow line due to rapid diameter reduction of the nozzle hole 108 is suppressed, and straightness of the jet flow is improved.

(second embodiment)

As shown in fig. 3, 4, and 5, the nozzle 200 of the present embodiment includes a shaft 202, a liquid guide path 104, a liquid chamber 206, a plate 228, and nozzle holes 208a and 208 b.

The shaft body 202 extends along the central axis 127. The shaft body 202 is cylindrical. For example, the shaft body 202 has an outer diameter of 5mm to 8 mm.

The liquid guide path 104 is disposed inside the shaft body 202.

The liquid chamber 206 is disposed at the distal end of the liquid guide path 104 and extends along the central axis 127. The liquid chamber 206 has a bottom 214.

A plate 228 extends from the base 214 along the central axis 127. The plate 228 is a cylinder having a plane 230 extending along the central axis 127. The plate 228 divides the liquid chamber 206 into a first liquid chamber 206a and a second liquid chamber 206 b. Each flat surface 230 faces the first liquid chamber 206a and the second liquid chamber 206b, respectively. The plate length 238 is, for example, 4 times the orifice diameter 118. The plate width 234 is, for example, one sixth of the liquid chamber diameter 116. The first liquid chamber 206a and the second liquid chamber 206b are symmetrical with respect to the central axis 127. For example, the inner diameter of the liquid chamber 206 is 3mm to 6mm, the orifice diameter 118 is 0.5mm to 2.0mm, the plate width 234 is 0.5mm to 1mm, and the plate length 238 is 5mm to 10 mm.

The nozzle hole (first nozzle hole) 208a is located at a leading end portion of the first liquid chamber 206 a. The nozzle hole 208a has an introduction portion 210 a. The introduction portion 210a is connected to the first liquid chamber 206 a. The lead-in portion 210a is a truncated cone having an apex angle 236. The apex angle 236 is, for example, 60 degrees.

A nozzle hole (second nozzle hole) 208b is located at the tip end portion of the second liquid chamber 206 b. Nozzle hole 208b is substantially the same as nozzle hole 208 a.

The nozzle holes 208a and 208b are circular with the injection axis 122 as the center.

The plate 228 divides the liquid chamber 206 into the first liquid chamber 206a and the second liquid chamber 206b, and thereby can suppress disturbance of the liquid inside the liquid chamber due to entrainment of the liquid discharged from the nozzle holes 208a, 208b into the air of the nozzle holes 208a, 208 b. This suppresses disturbance of the liquid discharged from the nozzle holes 208a and 208b, and improves the straightness of the jet flow.

(third embodiment)

As shown in fig. 6, 7, and 8, the nozzle 300 of the present embodiment includes a shaft 302, a liquid guide path 104, a step 340, a liquid chamber 306, and nozzle holes 308a and 308 b. The shaft body 302 extends along the central axis 127. The shaft 302 has exit planes 342a, 342 b. The outlet planes 342a, 342b are provided by being grooved on the outer shape of the shaft body 302. The outlet planes 342a and 342b are located symmetrically with respect to the central axis 127. The outlet planes 342a, 342b are perpendicular to the injection axis 122.

The drainage path 104 has a step 340. The step 340 is disposed at the front end of the liquid guide path 104, and constitutes a part of the outer shape of the liquid guide path 104. Step 340 connects liquid guide path 104 and liquid chamber 306 in such a manner that the sectional area becomes smaller toward the downstream.

The liquid chamber 306 is disposed at the distal end of the liquid guide path 104 and extends along the central axis 127. The liquid chamber 306 has a bottom 314 and inlet flats 344a, 344 b. The bottom 314 is planar. The inlet planes 344a, 344b are connected to the step 340. The inlet planes 344a and 344b are located symmetrically with respect to the central axis 127. The inlet planes 344a, 344b are perpendicular to the injection axis 122.

Nozzle orifices 308a, 308b are substantially identical to nozzle orifice 108. The upstream end of the nozzle hole 308a is connected to the inlet plane 344 a. The downstream end of the nozzle hole 308a is connected to the outlet plane 342 a.

The nozzle hole 308b is connected to the inlet plane 344b and the outlet plane 342 b. Nozzle aperture 308b is substantially identical to nozzle aperture 308 a.

The amount of air flowing in from the periphery of the nozzles 313a, 313b becomes uniform by the outlet planes 342a, 342 b. Further, the axial lengths of the nozzle holes 308a and 308b in the circumferential direction are equalized by the inlet planes 344a and 344b and the outlet planes 342a and 342 b. As a result, disturbance of the liquid discharged from the nozzle holes 308a and 308b is suppressed, and straightness of the jet flow is improved.

In the case where the bottom 314 is constituted by a flat surface, the streamline of the liquid in the liquid chamber 306 is aligned. Therefore, turbulence in the nozzle holes 308a and 308b is suppressed, and straightness of the jet flow is improved.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention, and all technical matters included in the technical idea described in the claims are intended to be the objects of the present invention. While the preferred embodiments have been described, those skilled in the art will be able to realize various alternatives, modifications, variations and improvements based on the disclosure of the present specification, and such alternatives, modifications, variations and improvements are encompassed within the technical scope of the present invention as set forth in the appended claims.