JPH0463699A - Injection nozzle device for ultra-high-pressure water - Google Patents

Abstract

PURPOSE:To effectively reduce the turbulent flow of high-pressure water in a focusing chamber and improve the flow characteristic by providing a valve body reciprocated in the penetrating direction of an inlet passage and opening or closing the inlet passage opened to an inlet chamber. CONSTITUTION:The inlet passage 13 of a device main body 1 is opened or closed via a valve body 2 via the reciprocation of the valve body 2 by a reciprocating system 3, and the high-pressure water guided from the inlet 11 of the device main body l at the time of an opening action is injected as ultra-high- pressure water from a nozzle 15 via an inlet chamber 12, an inlet passage 13 and a focusing chamber 14. The valve body 2 is reciprocatably arranged on the inlet passage 13 side to the focusing chamber 14, not in the focusing chamber 14, thus the turbulent flow of the high-pressure water in the focusing chamber 14 is reduced, and the flow characteristic of a fluid to the nozzle 15 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ultra-high pressure water injection nozzle device used in a water jet cutting device or the like.

(Prior art) Conventionally, this type of injection nozzle device was disclosed in Japanese Patent Publication No. 60-9199.
It is shown in the publication No. As shown in FIG. 4, this nozzle device includes a nozzle tube (A) and a nozzle tube (A).
), and an inlet chamber (C) for high-pressure water is formed on the opposite side of the tube (A) from the nozzle (B). At the same time, a small-diameter inlet passage (D) communicating with the inlet chamber (C) is provided, and a large-diameter focusing chamber (E) is formed between the inlet passage (D) and the nozzle (B). , the high-pressure water introduced from the inlet chamber (C) is guided to the large-diameter convergence chamber (E) via the small-diameter inlet passage (D).
) is known in which ultra-high pressure water is jetted from the nozzle (B) while maintaining good flow characteristics of the high-pressure water reaching the nozzle (B) by preventing the occurrence of turbulence within the nozzle (B). .

In the nozzle device configured as described above, an opening/closing mechanism for opening and closing the nozzle (B) is provided, as disclosed in, for example, Japanese Patent Laid-Open No. 5E3-84657. As shown in FIG. 5, this opening/closing mechanism operates within a focusing chamber (E) provided in the nozzle tube (A).
A valve body (F) that opens and closes the passage leading to the nozzle is provided at a position close to the nozzle B), and by controlling the opening and closing of this valve body (F), the injection of ultra-high pressure water from the nozzle and An ultra-high-pressure water injection nozzle device has also been proposed that allows workpiece switching operations to be performed automatically by controlling stopping and stopping according to a program.

(Problem to be Solved by the Invention) However, in the injection nozzle device shown in FIG. 5, the valve body (F
) and a stem (G) that opens and closes the valve body (F), the stem (G) and the valve body (F) control the flow characteristics of high-pressure water in the focusing chamber (E). This causes problems such as poor switching quality and reduced performance. Further, the nozzle device includes a nozzle (B) in a nozzle tube (A), this nozzle tube (A) in the device main body (H), and an opening/closing mechanism for the valve body (F) in the device main body (H). Since the valve body (F) is mainly assembled by screw connection, due to this assembly error, etc.
This causes variations in the dimensional accuracy between the valve body (F) and the nozzle (B) seat surface on which the valve body (F) is seated, and due to this variation, the stroke of the valve body (F) fluctuates, and the There was also the problem that the injection and stopping of high-pressure water could not be performed accurately, resulting in poor cutting quality when cutting workpieces using automatic control.

The present invention was made in view of the various problems mentioned above.
The purpose of this is to improve the flow characteristics of high-pressure water in the focusing chamber, reduce the time lag when injecting or stopping ultra-high-pressure water from the nozzle, and even if there are variations when assembling the device. It is an object of the present invention to provide an injection nozzle device which can accurately adjust the stroke of the valve body and can accurately inject and stop ultra-high pressure water from the nozzle.

(Means for Solving the Problems) In order to achieve the above object, an ultra-high pressure water injection nozzle device according to the present invention includes a nozzle (work 5) and a nozzle (15).
); an inlet chamber (12) communicating with the inlet passage (13) of the focusing chamber (14) and the high-pressure water inlet (11); aisle(
a valve body (2) that reciprocates in the penetrating direction of the valve body (13) and opens and closes the inlet passageway (13) that opens into the inlet chamber (12);
A reciprocating mechanism (3) having a drive member (33) that controls opening and closing of the valve body (2) is provided, and the reciprocating mechanism (3) is configured to restrain the back movement of the drive member (33). The present invention is characterized in that it includes a stroke adjustment mechanism (4) that adjusts the stroke of the valve body (2).

at the opening of said inlet passageway (13) to the inlet chamber (12);
It is desirable to provide a seat portion (13a) having an inner surface of the conical pillow, and to provide the valve body (2) with a seat surface (2a) that seats on the inner surface of the conical pillow of the seat portion (13a).

Further, the stroke adjustment mechanism (4) contacts the drive member (33) and moves the drive member (33) to the valve body (2).
) a stroke adjustment body (41) that is moved to the closed position;
A holding body (43) that movably holds this stroke adjustment body (4 parts) and has an adjustment scale (42) on its outer periphery, and an adjustment knob that is fixed to the stroke adjustment body (41) so that its relative position can be changed. (44) is preferable.

(Function) The reciprocating movement of the valve body (2) by the reciprocating mechanism (3) opens and closes the inlet passage (13) of the device main body (1) via the valve body (2), and this opening operation At times, high-pressure water introduced from the inlet (11) of the device main body (1) enters the inlet chamber (12), the inlet passageway (13), and the focusing chamber (14).
The water is then injected from the nozzle (15) as super high pressure water. Therefore, since the valve body (2) is reciprocably disposed not within the focusing chamber (14) (but on the side of the entrance passageway (13) to the focusing chamber (14)), the focusing chamber (14) The nozzle (15) reduces the turbulence of high pressure water in the chamber (14).
), it is possible to improve the fluid flow characteristics. Further, as described above, the valve body (2) is connected to the inlet passage (13).
), compared to the nozzle device shown in FIG. However, this time lag can be minimized by adjusting the stroke of the valve body (2), and even if there are variations when assembling the device, the stroke adjustment mechanism (4) can adjust the time lag to a minimum. By adjusting the stroke of the body (2), the variation can be almost eliminated and the accuracy of jetting and stopping the ultra-high pressure water from the nozzle (15) can be improved.

Further, a seat portion (13a) having a conical inner surface is formed at the opening of the inlet passageway (13) to the inlet chamber (12), and the seat portion (13a) has a conical inner surface on the valve body (2) side. When providing a seat surface (2a) to sit on the conical inner surface of the valve body, when the valve body (2) is closed by the reciprocating mechanism (3), the valve body (2) is self-centering according to the fluid flow direction. This function enables the inlet passageway (13) to be reliably closed. That is, the high-pressure water introduced into the inlet chamber (12) from the inlet (11) is introduced into the inlet passageway (13) while going around along the seat surface (13a). The high pressure water flowing around along the valve body (13a)
2) has a self-centering effect, and the valve body (2) reliably closes the inlet passage (13).

Further, the stroke adjustment mechanism (4) is brought into contact with the drive member (33), and the drive member (33) is brought into contact with the valve body (2).
) a stroke adjustment body (41) that is moved to the closed position;
A holder (43) that movably holds this stroke adjustment body (41) and has an adjustment scale (42) on its outer periphery, and an adjustment knob (43) that is fixed to the stroke adjustment body (41) so that its relative position can be changed. 44), the stroke of the valve body (2) can be easily and accurately adjusted by external operation while checking the scale (42), and the stroke of the valve body (2) can be adjusted accurately. By making the adjustment, the time lag of the valve body (2) during automatically controlled cutting work can be minimized, and productivity can be improved.

(Example) Fig. 1 shows the overall structure of the injection nozzle device, in which (1) is the main body of the device, and the main body block (IA)
and the ground (IB) on the negative side of the main body block (IA).
A nozzle tube (IC) that is assembled with a screw thread, and a high-pressure water inlet (11) is provided on the outer circumference side of the main body block (IA) in a direction perpendicular to the nozzle tube (IC). Further, an inlet chamber (12) communicating with the inlet (11) is formed inside the main body block (IA), and an inlet chamber (12) is formed inside the main body block (IA), and the nozzle tube (IC) assembled to the main body block (IA) is Inside, a small-diameter inlet passage (13) opening into the inlet chamber (12) and a large-diameter focusing chamber (14) communicating with the inlet passage (13) are provided, respectively, in the nozzle tube (IC). A hole is formed through the focusing chamber (14) in the length direction, and on the tip side of the focusing chamber (14),
The nozzle (15) is supported via a nozzle nut (ID) attached to the outer periphery of the tip of the nozzle tube (IC).

Further, a valve body (2) that is reciprocated in the same direction as the length direction of the inlet passage (13) is disposed inside the main body block (IA) at a portion facing the inlet passage (13). The reciprocating movement of the valve body (2) opens and closes the opening side of the inlet passage (13) to the inlet chamber (12).

Further, the valve body (2) is reciprocated via a reciprocating mechanism (3) attached to the side of the device main body (1), and this reciprocating mechanism (3) An internally hollow cylinder member (32) provided with a lid (31) having an air inlet (35) for supplying compressed air;
2) A drive member (33) consisting of a piston that reciprocates within the
), the valve body (2) is interlocked and connected to the central portion of the drive member (33), and the reciprocating mechanism (3) is provided with a mechanism for reciprocating the drive member (33). A stroke adjustment mechanism (4) is provided that restricts and adjusts the stroke of the valve body (2).

In FIG. 1, (16) is a sealing member disposed on the outer periphery of the valve body (2) at the side of the inlet chamber (12) in the apparatus main body (1), and (17) is the sealing member. (16) is a backup ring provided on the side, and (34) is between the cylinder member (32) and the drive member (33) in the reciprocating mechanism (3) and between the cylinder member (32) and the lid (
31) is a sealing O-ring placed between the

Next, the operation of the injection nozzle device configured as above will be explained.

First, air is supplied into the cylinder member (32) from the air inlet (35) provided in the lid (31) of the reciprocating mechanism (3), thereby causing the air to flow through the drive member (33). The valve body (2) is advanced to the inlet passage (13) side of the device main body (2), and the inlet passage (13) is closed by the valve body (2), so that the air from the nozzle (15) is Ultra-high pressure water injection is stopped.

Further, the air inlet (35) is connected to the cylinder member (3).
By stopping the air supply to 2) and releasing the pressing force on the drive member (33), the high pressure introduced into the inlet chamber (12) from the inlet (11) of the device main body (1) The water causes the valve body (2) and the driving member (33) to move back within a predetermined stroke range set by the stroke adjustment mechanism (4), opening the inlet passage (13) and opening the inlet passage (13). The high pressure water introduced into the chamber (work 2) passes through the inlet passageway (13) and the focusing chamber (14), and then reaches the nozzle (15).
) is injected as ultra-high pressure water.

Therefore, as described above, by arranging the valve body (2) so as to be able to reciprocate at a position facing the inlet passageway (13), the valve body (2) and Since the stem operating the stem does not intervene, the high-pressure water introduced from the inlet passage (13) into the focusing chamber (14) is supplied to the nozzle (15) side with good flow characteristics. In addition, since the stroke of the valve body (2) can be adjusted by the stroke adjustment mechanism (4), ultra-high pressure water can be supplied from the nozzle (15) while being disposed in the inlet passage (13). The time lag when injecting or stopping the injection can be reduced, and even if there are variations when assembling the device, the stroke of the valve body (2) can be adjusted by the stroke adjustment mechanism (4), so the nozzle (15) The injection and stop of ultra-high pressure water can be precisely controlled.

Therefore, in the above configuration, the inlet passage (13)
A seat surface (2a) having a semicircular arc shape as shown in FIG. 2 is formed on the distal end side of the valve body (2) facing the inlet. Passage (13
) is preferably formed with a seat portion (13a) having a conical inner surface on the opening side to the entrance chamber (12). In this case, when the valve body (2) is reciprocated by the reciprocating mechanism (3), the seat portion (2a) of the valve body (2) is guided by the seat surface (13a) of the inlet passageway (13). However, the valve body (2) can reliably close the inlet passageway (13). That is, the entrance (11)
The high-pressure water introduced into the inlet chamber (12) from the inlet passageway (12) flows around along the sheet surface (13a).
3), the high-pressure water that circulates along the seat surface (13a) acts on the valve body (2) with a self-aligning function, and the valve body (2) closes the inlet passage. (13) is reliably closed, and the injection of ultra-high pressure water from the nozzle (15) can also be stopped with high precision.

Further, it is preferable that the adjustment mechanism (4) for adjusting the stroke of the valve body (2) is constructed as shown in FIG. 3. That is, the one shown in Fig. 3 has threaded portions (4
1a) and a holder (43) provided with an adjustment scale (42) on its outer periphery.
A screw hole (43a) is formed to be screwed into the screw portion (41a) of 1), and the screw portion (4) is connected to the screw hole (43a).
1a), the adjusting body (41) is attached to the holding body (
43), and this holding body (43).
), a large-diameter flange (43b) is integrally formed in the longitudinally intermediate portion of the holder (43), and the outer surface of the flange (43b) is used as a reference plane, and the outer peripheral surface of the holder (43) is Said scale (42)
is engraved on the outer peripheral surface of the other side, and the reciprocating mechanism (3
) is formed with a threaded part (43c) that is screwed into the threaded hole (31a) formed in the lid body (31), and this threaded part (43c)
By screwing into the threaded hole (31a), the holding body (4
3) is fixed to the lid (31). Furthermore,
An adjustment knob (44) having a threaded hole (44a) that is screwed into the threaded portion (41a) of the adjustment body (41) is attached to the threaded portion (41a) of the adjustment body (41). (41a
) is movably supported to the outside of the holding body (43), and the adjustment knob (44) has a fixing screw (44b) that is screwed into the adjustment body (41) from its outer circumference.
).

However, the stroke adjustment mechanism (4
) is activated when assembling the device, etc.
When adjusting the stroke of the valve body (2) using this mechanism (4), first loosen the fixing screw (44b) provided between the adjustment knob (44) and the adjustment body (41). In this state, the screw portion (41) of the adjusting body (41) is
Rotate the retaining groove (4l b) provided on the outer end surface of a) with a screwdriver or the like to screw the threaded portion (41a) into the inner peripheral screw hole (43a) of the holder (43), The distal end thereof is brought into contact with the central end surface of the drive member (33), and the adjustment body (41) is further rotated, so that the valve body (2) is moved through the drive member (33). The leading edge seat portion (2a) is brought into contact with the seat surface (13a) of the inlet passageway (13). When the seat part (2a) comes into contact with the seat surface (13a), further screwing is impossible, so the rotation operation of the adjustment body (41) is stopped, and after that, the adjustment body (41) is stopped. A reference surface on which the knob (44) is screwed along the threaded portion (41a) of the adjustment body (41), and the adjustment knob (44) is formed on the outside of the flange (43b) of the holding body (43). In this state, the screw (44b) is tightened to fix the adjustment knob (44) and the adjustment body (41). Then, while checking the scale (42), the adjustment knob (44) is rotated in a reverse direction until it matches the predetermined scale (42).

Therefore, the amount of reverse screwing from the reference surface is the same as that of the valve body (2).
), and the scale (42)
By aligning the edge of the adjustment knob (44) with the
The stroke of the valve body (2) can be accurately adjusted to a predetermined stroke.

As described above, when adjusting the stroke of the valve body (2) with the stroke adjustment mechanism (4), as shown in FIG. 2, when the valve body (2) is opened, the inlet passage (
The tip of the seat portion (2a) of the valve body (2) is located on the same straight line (A) passing through the outer end surface of the seat surface (13a) provided in the valve body (13), or
In contrast to (a), the sheet portion (2a)
Adjust it so that it is slightly inward. In this case, the sheet of high-pressure water introduced into the inlet chamber (12) from the inlet (11) is prevented from being tilted by the high-pressure water introduced into the inlet chamber (12). By wrapping around the surface (13a), the self-aligning function of the valve body (2) can be activated, and the closing of the inlet passage (13) by the valve body (2) is ensured. Also, this entrance passage (1
It is possible to minimize the time lag between the injection from the nozzle (15) or the stop of the injection when the nozzle (15) is closed, and the cutting quality of the cutting operation by automatic control can be improved, and productivity can be improved.

(Effects of the Invention) As explained above, the injection nozzle device of the present invention includes a nozzle (15) and a focusing chamber (14) leading to the nozzle (15).
), an inlet chamber (12) that communicates with the inlet passage (13) of the focusing chamber (14) and the surface pressure water inlet (11), and a through-hole of the inlet passage (13). The inlet passage (12) reciprocates in the direction and opens into the inlet chamber (12).
13) includes a reciprocating mechanism (3) having a valve body (2) that opens and closes, and a drive member (33) that controls opening and closing of the valve body (2), and the reciprocating mechanism (3) includes: Since the stroke adjustment mechanism (4) is provided to restrict the backward movement of the drive member (33) and adjust the stroke of the valve body (2), the turbulent flow of high-pressure water in the convergence chamber (14) can be effectively made. Since the stroke of the valve body (2) can be adjusted by the stroke adjustment mechanism (4) while maintaining good flow characteristics, the time lag when injecting or stopping ultra-high pressure water from the nozzle (15) can be reduced. Moreover, even if there is a variation when assembling the device, it can be corrected by adjusting the stroke of the valve body (2) using the stroke adjuster wI (4).
), it is possible to accurately inject and stop ultra-high pressure water.

Further, a seat portion (13a) having a conical inner surface is formed at the opening of the inlet passageway (13) to the inlet chamber (12), and the seat portion (13a) has a conical inner surface on the valve body (2) side. By providing a seat surface (2a) on which to sit, when the valve body (2) is closed by the reciprocating mechanism (3), the inlet chamber (2a) is provided.
The self-aligning function can be applied to the valve body (2) by the high-pressure water introduced into the valve body (12) and flowing around along the seat surface (13a). (13) can be reliably closed.

Further, the stroke adjustment mechanism (4) is brought into contact with the drive member (33), and the drive member (33) is brought into contact with the valve body (2).
) a stroke adjustment body (41) that is moved to the closed position;
A holder (43) that movably holds this stroke adjustment body (41) and has an adjustment scale (42) on its outer periphery, and an adjustment knob (43) that is fixed to the stroke adjustment body (41) so that its relative position can be changed. 44), the stroke of the valve body (2) can be easily and accurately adjusted by external operation while checking the scale (42).

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the injection nozzle device according to the present invention, and FIG.
The figure is an enlarged sectional view showing the valve body and the inlet passage, FIG. 3 is an enlarged half sectional view of the stroke adjustment mechanism, and FIGS. 4 and 5 are sectional views showing a conventional example. (1)--@ (11) -轡(12) 轟 WAR (13) e Tatami (,13a) 9 (14) Work ◆ (15)-Work (2) Φ Φ number (2a) @ ・ (3)・ ・ e (33) ・ ・ (4) ・ ・ ・ (41) −・ (42) −・ (43) ・ − (44) Φ ・ ψ Device body/entrance/entrance chamber ψ Entrance passage writing surface focusing Chamber nozzle 9 Valve element Fist part Injection/removal mechanism Part Moving part phrase Stroke adjustment mechanism 1 Stroke adjustment body/adjustment scale Life support body/adjustment knob

Claims (1)

[Claims] 1) A nozzle (15), a focusing chamber (14) leading to the nozzle (15), communicating with an inlet passage (13) of the focusing chamber (14) and a high-pressure water inlet (11). a device main body (1) comprising an inlet chamber (12); and a valve body that reciprocates in a penetrating direction of the inlet passage (13) and opens and closes the inlet passage (13) that opens into the inlet chamber (12). (2) and this valve body (2)
A reciprocating mechanism (
3), and the reciprocating mechanism (3) also includes a stroke adjustment mechanism (4) that restricts the double motion of the drive member (33) and adjusts the stroke of the valve body (2). An ultra-high pressure water injection nozzle device characterized by: 2) at the opening of the inlet passageway (13) to the inlet chamber (12);
It includes a seat portion (13a) with a conical inner surface, and a valve body (2).
) is the ultra-high pressure water injection nozzle device according to product claim 1, comprising a seat surface (2a) that is seated on the conical inner surface of the seat portion (13a). 3) The stroke adjustment mechanism (4) includes a stroke adjustment body (41) that comes into contact with the drive member (33) and moves the drive member (33) to the closed position of the valve body (2); a holding body (43) movably holding the body (41) and having an adjustment scale (42) on its outer periphery; and an adjustment knob (44) fixed to the stroke adjustment body (41) so as to be able to change its relative position. The ultra-high pressure water injection nozzle device according to claim 1, comprising: