JP2013193015A - Spray nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray nozzle that is superior in maintainability while securely preventing a nozzle cap from falling.SOLUTION: A spray nozzle includes a nozzle body 1, a ring member 2, and a nozzle cap 3. The nozzle body 1 includes a first tapered surface 110 having a tip outer peripheral surface tapered, a spiral groove 111 formed on the first tapered surface 110, a communication hole 121, a first male screw portion 131, an O ring 141, a stroke portion 150, and a first flange portion 160. The ring member 2 has a second male screw portion 232, a second flange portion 260, a slide portion 240 where the O ring 141 is slidable in a sealed state, and a small-diameter portion 250. The nozzle cap 3 has a nozzle hole 300, a second tapered surface 310 in a tip tapered shape along the first tapered surface 110, a first female screw portion 331 threadably engaging the first male screw portion 131, and a second female screw portion 332 threadably engaging the second male screw portion 232.

Description

  The present invention relates to a spray nozzle that ejects fluid.

  Conventionally, a spray nozzle including a nozzle cap and a pipe to which a liquid is supplied is known as this type of spray nozzle (see Patent Document 1 and FIG. 1 below). The nozzle cap has two chambers with a large diameter and a small diameter inside, a nozzle hole at the tip, and a female thread portion on the inner peripheral surface on the rear end side. On the other hand, the pipe has a contact portion that contacts the inner surface of the small-diameter chamber at the tip, a groove portion that is obliquely grooved in the contact portion, and a plunger that contacts the inner surface of the large-diameter chamber on the rear end side. Part, a communication hole provided between the contact part and the plunger part, and a male thread part screwed onto the female thread on the outer peripheral surface of the rear end.

  According to such a conventional spray nozzle, the angle of the liquid ejected from the nozzle hole changes depending on the screwing position of the female screw of the nozzle cap and the male screw of the pipe. For example, when the pipe is advanced relative to the nozzle cap and the abutting portion of the pipe is brought into contact with the inner surface of the small-diameter chamber of the nozzle cap, the liquid supplied into the nozzle cap through the communication hole Liquid is ejected radially from the nozzle hole at the tip of the nozzle cap through the groove.

  On the other hand, when the pipe is moved backward with respect to the nozzle cap so that the contact portion does not come into contact with the inner surface of the small-diameter chamber, the entire interior of the nozzle cap is uniformly filled with the liquid from the nozzle hole. Liquid is ejected in a straight line.

Japanese Utility Model Publication No. 53-17912

  Here, in the spray nozzle of the above-mentioned Patent Document 1, when the pipe is moved backward with respect to the nozzle cap in order to inject the liquid in a straight line from the nozzle hole, the internal thread of the nozzle cap and the male thread of the pipe are not screwed together. There is a problem that the nozzle cap comes off from the pipe.

  In particular, spray nozzles are often supplied with a high-pressure liquid to be ejected from nozzle holes. Therefore, in addition to the user accidentally dropping the nozzle from the pipe, there is a concern that the pipe gradually moves backward with respect to the nozzle cap due to the pressure of the high-pressure liquid and drops.

  Here, in order to prevent the nozzle cap from falling off, it is conceivable to provide a stopper, but the spray nozzle is periodically separated from the viewpoint of prevention of clogging, etc. It is necessary to clean it. For this reason, in the case where a drop prevention for preventing the drop is provided, the maintainability is impaired.

  In view of the above circumstances, an object of the present invention is to provide a spray nozzle excellent in maintainability while reliably preventing the nozzle cap from falling off.

The spray nozzle of the first invention is
A spray nozzle for injecting fluid,
A tubular nozzle body connected to a supply pipe to which the fluid is supplied, a ring-shaped ring member attached to the outer periphery of the nozzle body, and a nozzle attached to the tip side of the nozzle body via the ring member With a cap,
The nozzle body includes a central pipe line that communicates with the supply pipe through a central axis thereof, a first tapered surface having a tapered outer peripheral surface at the distal end, and a distal end of the first tapered surface that is formed on the first tapered surface. A spiral groove that communicates with the rear end, a communication hole that is provided on the rear end side of the first tapered surface and that communicates with the central conduit, and a screw groove is formed on the outer peripheral surface of the rear end side of the communication hole. A first male screw portion, a stroke portion formed on the rear end side of the first male screw portion and having the same diameter over a certain length, and the first male screw portion is attached between the first male screw portion and the stroke portion. A large-diameter first flange portion provided on the rear end side of the stroke portion, and a connection portion connected to the supply pipe on the rear end side of the first flange portion,
The ring member includes a second male screw portion having a screw groove formed on an outer peripheral surface on a front end side, a large-diameter second flange portion provided on a rear end side of the second male screw portion, and an inner periphery on a front end side. A slide portion provided on the surface and slidable in a sealed state, and a small diameter portion provided on a rear end side of the slide portion and having a smaller diameter than the slide portion and the seal member and capable of moving the stroke portion. Have
The nozzle cap includes a nozzle hole formed at the tip, a tapered second taper surface formed along the first taper surface formed on an inner peripheral surface on the tip side continuous with the nozzle hole, and the second taper. A screw groove formed on the rear end side of the surface and screwed into the first male screw portion; and an inner peripheral surface having a larger diameter than the first female screw portion on the rear end side of the first female screw portion. A screw groove is formed, and the second male screw portion is screwed with the second male screw portion.

  According to the spray nozzle of the first invention, the angle of the fluid ejected from the nozzle hole can be changed according to the screwing position of the first male screw portion of the nozzle body and the first female screw portion of the nozzle cap. First, in a state where the nozzle main body is advanced with respect to the nozzle cap and the first taper surface and the second taper surface are in contact with each other, the fluid supplied from the central conduit through the communication hole passes through the spiral groove to form the nozzle. It can be ejected radially from the holes. On the other hand, when the nozzle body is moved backward with respect to the nozzle cap and the contact between the first taper surface and the second taper surface is released, the fluid supplied from the central pipe line through the communication hole enters the nozzle cap. It can be filled (without passing through only the spiral groove) and sprayed straight from the nozzle hole.

  At this time, the nozzle cap is used with the second female screw portion screwed into the second male screw portion of the ring member. In addition to screwing the first female threaded portion of the nozzle cap and the first male threaded portion of the nozzle body, only the nozzle cap is removed from the nozzle body by screwing the second female threaded portion of the nozzle cap and the second male threaded portion of the ring member. It can be reliably prevented from falling off.

  Furthermore, in the state where the ring member is mounted on the outer periphery of the stroke portion of the nozzle body and the seal member is attached, the ring member is integrated with the ring member because its small diameter portion comes into contact with the seal member to prevent it from coming off. It is also possible to prevent the nozzle cap from dropping from the nozzle body together with the ring member.

  On the other hand, the nozzle cap can be easily separated from the nozzle body by unscrewing the first female screw portion and the first male screw portion and unscrewing the second female screw portion and the second male screw portion. . Therefore, the nozzle cap can be separated and its inner surface and nozzle holes can be periodically cleaned.

  As described above, the spray nozzle of the first invention can reliably prevent the nozzle cap from falling off and is excellent in maintainability.

The spray nozzle of the second invention is the first invention,
When the ring member is mounted on the outer periphery of the stroke portion of the nozzle body and the seal member is attached, the ring member is positioned on the most distal side, and the second male screw portion and the second female screw portion The length of the stroke portion and the length of the second male screw portion and the screw groove of the second female screw portion are determined so that the first male screw portion and the first female screw portion are screwed together. It is characterized by that.

  According to the spray nozzle of the second invention, the second male screw portion and the second female screw portion are screwed together and the first male screw portion and the first female screw portion are screwed even when the ring member is located at the most distal end side. Thus, the length of the stroke portion and the lengths of the screw grooves of the second male screw portion and the second female screw portion are determined.

  Thereby, even when the ring member is located on the most distal side with respect to the nozzle body, in addition to screwing the first male screw portion of the nozzle main body and the first female screw portion of the nozzle cap, The male screw portion and the second female screw portion of the nozzle cap can be screwed together, and the nozzle cap can be reliably prevented from falling off.

The spray nozzle of the third invention is the second invention,
The nozzle cap and the ring member that are integrated by screwing the second male screw portion and the second female screw portion and screwing the first male screw portion and the first female screw portion into the nozzle body By rotating the nozzle cap and the ring member so that the first taper surface and the second taper surface come into contact with each other so that the nozzle cap and the ring member move backward with respect to the nozzle body. The length of the first male screw portion and the screw groove of the first female screw portion is determined.

  According to the spray nozzle of the third aspect of the invention, the nozzle cap and the ring member are integrated by screwing the second male screw portion and the second female screw portion and screwing the first male screw portion and the first female screw portion. When the nozzle cap and the ring member are rotated with respect to the nozzle body, the integrated nozzle cap and ring member are retracted from the nozzle body so that the first taper surface and the second taper surface come into contact with each other. In addition, the lengths of the screw grooves of the first male screw portion and the second female screw portion are determined. Further, at this time, the length of the stroke portion is set so that the ring member retracted from the nozzle body does not stop before the first tapered surface and the second tapered surface come into contact with each other by the first flange portion. It is determined to be smaller than a range in which the screw grooves of the first male screw part and the first female screw part are screwed together.

  Thus, even when the ring member integrated with the nozzle cap is retracted with respect to the nozzle body (the first taper surface and the second taper surface abut), the first male thread portion of the nozzle body and the nozzle cap first In addition to screwing the first female screw portion, the second male screw portion of the ring member and the second female screw portion of the nozzle cap can be screwed together, and the nozzle cap can be reliably prevented from falling off.

The spray nozzle of the fourth invention is any one of the first to third inventions,
The center pipe line has a tip through-hole penetrating the tip of the nozzle body on the tip side.

  According to the spray nozzle of the fourth aspect of the invention, the nozzle body is advanced with respect to the nozzle cap so that the first tapered surface and the second tapered surface are brought into contact with each other, and the fluid supplied from the central conduit through the communication hole is supplied. When spraying radially from the nozzle hole through the spiral groove, the fluid is supplied directly from the tip through hole toward the nozzle hole. As a result, when the fluid is ejected from the nozzle hole at a wide angle, the nozzle cap can be uniformly ejected including the central portion while reliably preventing the nozzle cap from falling off as described above.

The spray nozzle of the fifth invention is any one of the first to fourth inventions,
A plurality of the spiral grooves are provided on the first tapered surface;
A plurality of the communication holes are provided in accordance with the end portion on the rear end side of the spiral groove.

  According to the spray nozzle of the fifth aspect of the present invention, the plurality of communication holes are provided in accordance with the end portions on the rear end side of the plurality of spiral grooves. Therefore, even when the first taper surface and the second taper surface are in contact with each other and the flow path is limited to the spiral groove, the fluid supplied from the plurality of communication holes is allowed to pass through the adjacent spiral grooves. It can guide efficiently to the nozzle hole from the end through the spiral groove, and the discharge amount from the nozzle hole can be increased.

The fragmentary sectional view which shows the structure of the spray nozzle of this embodiment. The figure which shows the use condition of the spray nozzle shown in FIG.

  As shown in FIG. 1, the spray nozzle of the present embodiment is a nozzle that ejects fluid, and includes a nozzle body 1, a ring member 2, and a nozzle cap 3.

  First, the nozzle body 1 will be described. The nozzle body 1 is a generally tubular member connected to a supply pipe X (see FIG. 2) to which a fluid is supplied. In the present embodiment, the nozzle body 1 is a metal (stainless steel) member, but the material may be, for example, ceramic or synthetic resin.

  First, the inner surface of the nozzle body 1 is provided with a central pipe line 100 that communicates with the supply pipe X through its central axis. Here, the central pipe line 100 has an inner diameter gradually reduced from the rear end side to which the supply pipe X is connected toward the front end side, and has a front end through hole 101 through which the front end side penetrates. A diameter-enlarged portion 102 having an enlarged diameter at the tip of the hole 101 is formed.

  Next, the nozzle body 1 includes a first taper surface 110 having a tapered outer peripheral surface at the tip and a spiral groove 111 formed in the first taper surface 110 on the outer surface thereof.

  Here, as will be described later, the spiral groove 111 formed in the first tapered surface 110 is one in which fluid (for example, liquid water) supplied from the supply pipe X is guided to the distal end side via the spiral groove 111. (See FIG. 2 (c)). Therefore, a plurality of spiral grooves 111 (for example, four) are provided on the first taper surface 110 so as to correspond to a constant flow rate, and unlike a normal screw groove, the pitch is large and the depth is deep.

  Further, the nozzle body 1 has, on its outer surface, a slightly depressed outer peripheral surface 120 on the rear end side of the first tapered surface 110, a communication hole 121 communicating with the central conduit 100 on the outer peripheral surface 120, and a rear of the communication hole 121. And a first male thread portion 131 that is a screw groove formed in the outer peripheral surface 130 on the end side.

  Here, as will be described later, the communication hole 121 guides the fluid having a constant flow rate supplied from the supply pipe X to the spiral groove 111 (see FIG. 2C). A plurality (for example, four) are formed on the outer peripheral surface 120 with a predetermined diameter so as to correspond to the end portions.

  The outer peripheral surface 130 on which the first male thread 131 is formed has a diameter slightly larger than the diameter of the rear end portion of the first tapered surface 110 (the maximum diameter of the first tapered surface 110).

  Further, the nozzle body 1 has an O-ring 141 (corresponding to a seal member of the present invention) attached to a groove 140 formed on the rear end side of the first male thread 131 on the outer surface, and a rear of the O-ring 141. Stroke portion 150 provided on the end side and formed to have the same diameter over a certain length, a large-diameter first flange portion 160 provided on the rear end side of stroke portion 150, and first flange portion 160 A connecting portion 170 extending rearward from the rear end side and connected to the supply pipe X.

  Here, as for the 1st flange part 160, the shape of the outer periphery becomes a hexagon. Further, a screw groove 171 is formed in the connection portion 170.

  The above is the configuration of the nozzle body 1. The axial lengths of the first male thread 131 and the stroke 150 will be described later with reference to FIG.

  Next, the ring member 2 will be described. The ring member 2 is a ring-shaped member that is attached to the outer periphery of the nozzle body 1 and moves along the stroke portion 150. In the present embodiment, the ring member 2 is the same metal (stainless steel) member as the nozzle body 1, but the material may be, for example, ceramic or synthetic resin.

  First, the ring member 2 has, on its outer surface, a second male threaded portion 232 in which a thread groove is formed on the outer peripheral surface 230 on the front end side, and a large-diameter second flange provided on the rear end side of the second male threaded portion 232. Part 260. Here, the outer periphery of the second flange portion 260 has a hexagonal shape.

  Furthermore, the ring member 2 has a slide part 240 formed on the inner surface of the ring member 2 with the same diameter on the inner peripheral surface on the front end side over a certain length, and a slide part 240 provided on the rear end side of the slide part 240 from the slide part 240. Is also provided with a small-diameter portion 250 having a small diameter.

  Here, the diameter of the slide portion 240 is the same as or slightly smaller than the outer diameter of the O-ring 141 so that the O-ring 141 attached to the nozzle body 1 can slide in a sealed state. .

  Further, the diameter of the small diameter portion 250 is the same as or slightly larger than that of the stroke portion 150 so that the stroke portion 150 of the nozzle body 1 can be moved.

  The above is the configuration of the ring member 2. The length of the second male screw portion 232 in the axial direction will be described later with reference to FIG.

  Next, the nozzle cap 3 will be described. The nozzle cap 3 is a substantially frustoconical cap that is attached to the tip side of the nozzle body 1 via the ring member 2. In the present embodiment, the nozzle cap 3 is a metal (stainless steel) member that is the same as the ring member 2 and the nozzle body 1, but the material may be, for example, ceramic or synthetic resin.

  The nozzle cap 3 has a nozzle hole 300 formed on its inner surface so as to penetrate the tip, a second tapered surface 310 formed on the inner peripheral surface on the tip side continuous with the nozzle hole 300, and a second tapered surface. A first female thread portion 331 that is a screw groove formed on the inner peripheral surface on the rear end side of 310, and an inner peripheral surface that is larger in diameter than the inner peripheral surface on the rear end side of the first female thread portion 331. A second female thread portion 332 which is a screw groove.

  Here, the second tapered surface 310 has a tapered shape along the first tapered surface 110 of the nozzle body 1. The diameter and pitch of the first female thread portion 331 are determined so as to be screwed with the first male thread portion 131 of the nozzle body 1. Further, the diameter and pitch of the second female screw portion 332 are determined so as to be screwed with the second male screw portion 232 of the ring member 2.

  On the other hand, the shape of the rear end side of the outer surface of the nozzle cap 3 is a hexagon. The above is the configuration of the nozzle cap 3. The lengths in the axial direction of the first female screw portion 331 and the second female screw portion 332 will be described later with reference to FIG.

  The above is the overall configuration of the spray nozzle of the present embodiment.

  Next, with reference to FIG. 2, the usage method of the spray nozzle of this embodiment is demonstrated.

  First, as a premise, the supply pipe X is connected to the connecting portion 170 on the rear end side of the nozzle body 1. The nozzle body 1 and the supply pipe X are connected by, for example, screwing a screw groove (not shown) of the supply pipe X into the screw groove 171 of the connection portion 170. At this time, since the outer periphery of the first flange portion 160 has a hexagonal shape, the nozzle body 1 and the supply pipe X can be securely fastened using a tool such as a hexagon wrench.

  As shown in FIG. 2A, in the spray nozzle, first, the ring member 2 is mounted on the outer periphery of the stroke portion 150 of the nozzle body 1, and then the O-ring 141 is attached to the groove portion 140. Then, the slide part 240 of the ring member 2 is extrapolated to the O-ring 141, and the ring member 2 is moved forward with respect to the nozzle body 1.

  Next, as shown in FIG. 2B, in the state of FIG. 2A, the nozzle cap 3 is screwed to the distal end side of the nozzle body 1. At this time, the first female screw portion 331 of the nozzle cap 3 is screwed into the first male screw portion 131 of the nozzle body 1, and the second female screw portion 332 of the nozzle cap 3 is screwed into the second male screw portion 232 of the ring member 2. Thus, the length of the stroke portion 150 and the lengths of the screw grooves of the second male screw portion 232 and the second female screw portion 332 are determined.

  As a result, even when the ring member 2 is positioned on the most distal end side with respect to the nozzle body 1, in addition to screwing the first male thread portion 131 of the nozzle main body 1 and the first female thread portion 331 of the nozzle cap 3. The second male threaded portion 232 of the ring member 2 and the second female threaded portion 332 of the nozzle cap 3 can be screwed together, and the nozzle cap 3 can be reliably prevented from falling off.

  Further, since the small diameter portion 250 of the ring member 2 comes into contact with the O-ring 141 to prevent the ring member 2 from being detached, the nozzle cap 3 integrated with the ring member 2 is prevented from dropping from the nozzle body 1 together with the ring member 2. be able to.

  In addition, since the second flange portion 260 of the ring member 2 and the outer periphery of the rear end side of the nozzle cap 3 have the same hexagonal shape, the ring member 2 and the nozzle cap 3 can be used with a tool such as a hexagon wrench. Can be securely fastened.

  In the state of FIG. 2B, there is a gap between the first tapered surface 110 of the nozzle body 1 and the second tapered surface 310 of the nozzle cap 3. Therefore, the fluid (for example, water) supplied from the plurality of communication holes 121 passes through the outside of the spiral groove 111 of the first tapered surface 110 and is supplied and filled into the nozzle cap 3. The fluid filled in the nozzle cap 3 is ejected from the nozzle hole 300 at the tip of the nozzle cap 3.

  At this time, since the fluid ejected from the nozzle hole 300 passes through the nozzle hole 300 and is discharged as it is, it becomes a linear shape with a small ejection angle. Here, since the tip through-hole 101 of the nozzle body 1 is coaxial with the nozzle hole 300, the fluid filled in the nozzle cap 3 by the fluid discharged coaxially from the tip through-hole 101 is used as the nozzle hole 300. The fluid in the nozzle cap 3 can be efficiently ejected from the nozzle hole 300.

  Next, as shown in FIG. 2C, the first female thread portion 331 of the nozzle cap 3 and the nozzle body are rotated by rotating the nozzle cap 3 integrally with the ring member 2 from the state of FIG. The screwing position with the first male screw portion 131 is changed. The nozzle cap 3 and the ring member 2 are moved backward with respect to the nozzle body 1 so that the first taper surface 110 of the nozzle body 1 and the second taper surface 310 of the nozzle cap 3 come into contact with each other. And the length of the screw groove of the 1st internal thread part 331 is determined. That is, the lengths of the thread grooves of the first male thread part 131 and the first female thread part 331 are larger than the distance at which the nozzle cap 3 moves and the first tapered surface 110 and the second tapered surface 310 abut. It is determined.

  Further, the length of the stroke portion 150 is such that the ring member 2 can slide on the stroke portion 150 until the first tapered surface 110 of the nozzle body 1 and the second tapered surface 310 of the nozzle cap 3 come into contact with each other. Is determined. That is, when the ring member 2 integrated with the nozzle cap 3 moves backward, the ring member 2 comes into contact with the first flange portion 160 and stops before the first taper surface 110 and the second taper surface 310 come into contact with each other. In order to prevent this, the length of the stroke portion 150 is determined to be smaller than a range in which the screw grooves of the first male screw portion 131 and the first female screw portion 331 are screwed together.

  As a result, the ring member 2 integrated with the nozzle cap 3 can move to the first position of the nozzle body 1 even at a position where the first taper surface 110 and the second taper surface 310 are in contact with each other. In addition to screwing the 1 male screw part 131 and the first female screw part 331 of the nozzle cap 3, the second male screw part 232 of the ring member 2 and the second female screw part 332 of the nozzle cap 3 can be screwed together. This can reliably prevent the nozzle cap 3 from falling off.

  When the integrated nozzle cap 3 and ring member 2 are retracted from the nozzle body 1, the ring member 2 uses the small diameter portion 250 as a guide and the stroke portion 150 of the nozzle body 1 as the rear end side. Move towards. At this time, the slide portion 240 of the ring member 2 slides in a sealed state (a liquid-tight state when the fluid is water or the like) with respect to the O-ring 141 attached to the nozzle body 1.

  In the state of FIG. 2C, the first tapered surface 110 of the nozzle body 1 and the second tapered surface 310 of the nozzle cap 3 are in contact with each other. Therefore, the fluid (for example, water) supplied from the supply pipe X is supplied to the spiral groove 111 between the first tapered surface 110 and the second tapered surface 310 via the plurality of communication holes 121 from the central conduit 100. Then, it is guided to the tip end portion of the nozzle cap 3 through the spiral groove 111 and sprayed from the nozzle hole 300.

  At this time, since the fluid ejected from the nozzle hole 300 passes through the spiral groove 111 and is ejected from the nozzle hole 300 in a state having a centrifugal force outward in the circumferential direction, the ejection angle becomes radial. At this time, the fluid ejected coaxially from the tip through-hole 101 of the nozzle body 1 can be uniformly ejected from the nozzle hole 300 including the central portion.

  On the other hand, the first male screw portion 131 and the first female screw portion 331 are screwed together so as to separate the nozzle cap 3 from the nozzle body 1 and the ring member 2 from the state of FIG. 2B and FIG. The nozzle cap 3 can be separated from the nozzle body 1 and the ring member 2 by unscrewing the second male screw portion 232 and the second female screw portion 332.

  At this time, since the second flange portion 260 of the ring member 2 and the outer periphery on the rear end side of the nozzle cap 3 have the same hexagonal shape, the ring member 2 and the nozzle cap 3 are used using a tool such as a hexagon wrench. Can be easily unfastened. Therefore, the nozzle cap 3 can be separated and its inner surface and nozzle holes can be periodically cleaned.

  As described above in detail, according to the spray nozzle of the present embodiment, it is possible to reliably prevent the nozzle cap from falling off and to be excellent in maintainability.

  In the present embodiment, the case where the fluid supplied through the supply pipe X is water has been described. However, the fluid is not limited to water that is a liquid, but a liquid other than water (for example, a chemical solution). ) Or gas (for example, air).

  In the present embodiment, the connecting portion 170 protrudes rearward of the nozzle body 1, but is not limited to this, and the supply pipe is provided with a screw groove or the like on the inner peripheral surface of the first flange portion 160. X may be screwed.

  Furthermore, although the case where the seal member is the O-ring 141 has been described in the present embodiment, the seal member may be anything other than the O-ring that can be sealed.

DESCRIPTION OF SYMBOLS 1 ... Nozzle main body, 2 ... Ring member, 3 ... Nozzle cap, 100 ... Center pipe line, 110 ... 1st taper surface, 111 ... Spiral groove, 121 ... Communication hole, 131 ... 1st male thread part, 141 ... O-ring ( 150 ... stroke portion, 160 ... first flange portion, 170 ... connecting portion, 232 ... second male screw portion, 240 ... slide portion, 250 ... small diameter portion, 260 ... second flange portion, 300 ... nozzle hole, 310 ... 2nd taper surface, 331 ... 1st internal thread part, 332 ... 2nd internal thread part, X ... supply pipe | tube.

Claims (5)

A spray nozzle for injecting fluid,
A tubular nozzle body connected to a supply pipe to which the fluid is supplied, a ring-shaped ring member attached to the outer periphery of the nozzle body, and a nozzle attached to the tip side of the nozzle body via the ring member With a cap,
The nozzle body includes a central pipe line passing through the central axis thereof and communicating with the supply pipe, a first taper surface having a tapered outer peripheral surface at a tip end, and the first tapered surface formed on the first tapered surface. A spiral groove that communicates the front end and the rear end, a communication hole that is provided on the rear end side of the first taper surface and communicates with the central conduit, and a screw groove on the outer peripheral surface of the rear end side of the communication hole. A formed first male thread part, a stroke part provided on the rear end side of the first male thread part and formed with the same diameter over a certain length, and between the first male thread part and the stroke part. A large-diameter first flange portion provided on the rear end side of the stroke portion, and a connection portion connected to the supply pipe on the rear end side of the first flange portion. And
The ring member includes a second male screw portion having a screw groove formed on an outer peripheral surface on a front end side, a large-diameter second flange portion provided on a rear end side of the second male screw portion, and an inner periphery on a front end side. A slide portion provided on the surface and slidable in a sealed state, and a small diameter portion provided on a rear end side of the slide portion and having a smaller diameter than the slide portion and the seal member and capable of moving the stroke portion. Have
The nozzle cap includes a nozzle hole formed at a tip, a tapered second taper surface formed on an inner peripheral surface on the tip side continuous with the nozzle hole and along the first taper surface, A threaded groove formed on the rear end side of the two taper surface and screwed into the first male threaded part; and a diameter larger than the first female threaded part on the rear end side of the first female threaded part A spray nozzle characterized in that a screw groove is formed on an inner peripheral surface, and a second female screw portion that is screwed with the second male screw portion. The spray nozzle according to claim 1.
When the ring member is mounted on the outer periphery of the stroke portion of the nozzle body and the seal member is attached, the ring member is positioned on the most distal side, and the second male screw portion and the second female screw portion The length of the stroke portion and the length of the second male screw portion and the screw groove of the second female screw portion are determined so that the first male screw portion and the first female screw portion are screwed together. A spray nozzle characterized by that. The spray nozzle according to claim 2.
The nozzle cap and the ring member that are integrated by screwing the second male screw portion and the second female screw portion and screwing the first male screw portion and the first female screw portion into the nozzle body By rotating the nozzle cap and the ring member so that the first taper surface and the second taper surface come into contact with each other so that the nozzle cap and the ring member move backward with respect to the nozzle body. The spray nozzle characterized in that the first male thread part and the length of the thread groove of the first female thread part are determined. The spray nozzle according to any one of claims 1 to 3,
The spray nozzle according to claim 1, wherein the central conduit has a tip through hole penetrating the tip of the nozzle body on the tip side. The spray nozzle according to any one of claims 1 to 4,
A plurality of the spiral grooves are provided on the first taper surface;
A spray nozzle, wherein a plurality of the communication holes are provided in accordance with an end portion on a rear end side of the spiral groove.

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