JPH0679339A - Descaling nozzle with built-in stop piston valve - Google Patents

Abstract

PURPOSE:To compact the constitution of a descaling nozzle with built-in stop piston valve, to project the improvement of durability, sealing performance and to improve rectification efficiency by setting a passage of liquid formed in the inner part in a longitudinal direction. CONSTITUTION:In a descaling nozzle 10 the stop piston valve 19 is provided in the direction of flow of liquid so that the piston can be moved and in the flowing direction of the liquid to the stop piston valve, the stop piston valve is pressed by a spring 20 toward a valve seat 15a positioned on the upstream side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a descaling nozzle,
In particular, it relates to a descaling nozzle having a built-in open / close piston valve.

This type of descaling nozzle with a built-in open / close piston valve is extremely useful for removing scale on a rolled steel sheet.

[0003]

2. Description of the Related Art As a conventional descaling nozzle having a built-in open / close valve of this type, there is, for example, the one shown in FIG. The descaling nozzle 50 shown in FIG. 19 includes a nozzle body 51, and an opening / closing valve 53 is housed in the nozzle body 51 so as to be seated on a valve seat 52. A spring force of a pressing spring 54 accommodated in the nozzle body 51 is applied to the opening / closing valve 53 so that the opening / closing valve 53 is pressed against the valve seat 52.
In addition, the nozzle body 51 is provided with a water liquid inlet 55 through which water liquid can flow in from a direction perpendicular to the axial direction thereof.

However, when the water liquid is supplied from the water liquid inlet 55 and the liquid pressure exceeds the spring force of the pressing spring 54, the opening / closing valve 53 is separated from the valve seat 52, and the water liquid is discharged from the nozzle body. Inflow is from a direction perpendicular to the axis of 51. The water liquid flowing into the nozzle body 51 has a valve seat 52 and an opening / closing valve 53.
After a certain interval, the ejection chip 56 is aligned along the axis of the nozzle body 51.
And flows out toward and is ejected from the ejection chip 56. On the other hand, the supply of water liquid from the water liquid inlet 55 is stopped,
When the spring force of the pressing spring 54 exceeds the water pressure, the opening / closing valve 53 receives the spring force of the pressing spring 54 and is pressed against the valve seat. As a result, the opening / closing valve 53 immediately after the supply of the water liquid is stopped.
Is closed, the water liquid does not flow out from the ejection chip 56 for a long period of time, and the water liquid is well cut off.

[0005]

However, in the above-described conventional descaling nozzle with a built-in on-off valve, the action of the hydraulic pressure against the pressing spring 54 is focused on and the water liquid is applied from the direction perpendicular to the axis of the nozzle body 51. However, since the structure is complicated, there is a problem in terms of durability and sealability, and there are many problems in providing a good rectifying action to the water / liquid flow toward the ejection chip 56.

Further, when the water liquid is introduced from the direction perpendicular to the axis of the nozzle body 51, it is difficult to attach it to the existing water liquid supply header, and there is a problem in terms of versatility.

Therefore, the object of the present invention is to overcome the above-mentioned problems of the prior art, to have a simple structure, to be excellent in durability and sealing property, and to be good in rectification efficiency in a water-liquid flow flowing in the nozzle body. An object is to provide a descaling nozzle having a built-in open / close piston valve.

[0008]

SUMMARY OF THE INVENTION According to the present invention, the above object is to provide an opening / closing piston valve 19 for the liquid inlets 16 and 17 at the rear end of the nozzle, and to install the opening / closing piston valve 19 for the inlet. In the descaling nozzle 10 with a built-in opening / closing piston valve in which the ejection chip 23 is mounted, the opening / closing piston valve 19 is supported by a support body 19a that is capable of piston operation on the nozzle axis, and the upstream side of the support body 19a is located on the nozzle body side. A piston is supported by the guide sleeve 18 so that the piston can move. A compressed spring 20 is arranged between the open / close piston valve 19 and the guide sleeve 18, and a cross section is circular between the support body 19a and the inner peripheral wall surface of the nozzle body. An annular flow path is formed, and a rectifying member 21 is arranged between the support body 19a of the opening / closing piston valve 19 and the inner peripheral wall surface of the nozzle body. Is achieved by descaling nozzle, characterized in that it is.

[0009]

According to the descaling nozzle with a built-in open / close piston valve of the present invention having the above-mentioned structure, the open / close piston valve 19 is installed so as to be able to advance and retreat in the flow direction of the water liquid, and the open / close piston valve 19 is provided with water. Since the opening / closing piston valve 19 is pressed by the pressing spring 20 and seated on the valve seat 15a located on the upstream side in the flow direction of the liquid, a simple structure in which the whole body is simply rod-shaped can be obtained.

[0010]

1 to 4, a strainer assembly 11 and a chip assembly 12 are included in a descaling nozzle 10 having a built-in open / close piston valve.
Both assemblies 11, 12 are preferably a guide adapter 1.
3 and a chip holder 14 are interposed, and they are connected to each other so that a longitudinal flow path 10a of water liquid is formed therein, and these strainer assembly 11 and chip assembly 1 are connected.
2, the guide assembly 13 and the chip holder 14 form a nozzle body. The strainer assembly 11 includes a valve adapter 15 and a strainer main body 16 connected to the valve adapter 15. The strainer main body 16 is provided with a plurality of water liquid inlet slits 17, and the strainer main body 16 and the strainer main body 16 are connected to each other. A water liquid introducing port is formed by the mouth slit 17.

On the other hand, in the strainer assembly, a guide sleeve 18 is disposed so as to form an annular flow path between the strainer assembly and the inner peripheral wall surface of the strainer assembly. Scaling nozzle 10
The opening / closing valve 19 is supported by a support body 19a that is capable of piston operation in the axial direction of the above, and the support body 19a is supported by a guide sleeve 18 on the upstream side so that the piston can operate. A spring 20 in a compressed state is disposed between the open / close piston valve 19 and the guide sleeve 18, and the open / close piston valve 19 is positioned upstream of the spring 20 in the water liquid flow direction by the spring 20.
It is provided so as to be constantly pressed against the valve seat 15a formed inside, that is, always pressed upstream in the flow direction of the water liquid. In addition, between the support body 19a of the opening / closing piston valve 19 and the inner peripheral wall surface of the guide assembly 13, a plurality of rectifying members 21 that rectify the water liquid introduced from the inlet slit 17 are circumferentially provided from the guide sleeve 18. It is spaced apart and protrudes outward.

Further, the chip assembly 12 includes a chip body 22 and an injection chip 2 mounted in the chip body 22.
3 is included, and the opening of the ejection tip 23 is
It is provided so that the water liquid rectified via a can be suitably discharged in a desired ejection pattern.

However, when liquid water is supplied from the inlet slit 17 and the liquid pressure of this water liquid exceeds the spring force of the spring 20 in the compressed state, the opening / closing piston valve 19 is opened.
Moves away from the valve seat 15a and moves forward. Here, the water liquid passes through the annular flow passage around the opening / closing piston valve 19 and is rectified through the rectifying member 21, so that the long flow passage 10 is formed.
The liquid a is flown, and the decrease in hydraulic pressure is suppressed to a minimum, and the liquid is suitably ejected from the opening of the ejection chip 23. At this time, the jetted water liquid is well rectified in the descaling nozzle 10, and the flow passage 10a is provided in a sufficiently long direction to increase the jet pressure. Therefore, an effective descaling action is realized.

On the other hand, when the supply of the water liquid from the water inlet slit 17 is stopped and the spring force of the spring 20 exceeds the water pressure, the opening / closing piston valve 19 is retracted by the spring force of the spring 20 and the valve seat 15a. Press against. As a result, as soon as the supply of water is stopped, the opening / closing piston valve 19
Can be closed to block the water liquid, so that continuous outflow of the water liquid from the opening of the ejection chip 23 can be suppressed.

As shown in FIGS. 5 and 6, the flow regulating member 21
Upstream of the opening / closing piston valve 19 and the spring 20, a guide sleeve 18 is interposed to form an annular flow path with the inner peripheral wall surface of the strainer assembly 11, and another rectifying member 21a is formed in the circumferential direction. By arranging them separately from each other, the rectifying effect can be improved. The rectifying member 21a can be provided so as to project inwardly on the valve adapter 15 of the strainer assembly 11 over substantially the entire length of the guide sleeve 18 as shown in FIG. As shown in FIGS. 7 and 8, another rectifying member 21a may be provided on the guide sleeve 18 so as to be spaced apart from each other in the circumferential direction and to project outward. Still another rectifying member 21a is shown in FIG.
As shown in FIG. 11, the guide sleeve 18 may be provided so as to project only in a part in the length direction. Although not shown, the rectifying member 21a may be fitted freely, or both the outer and inner ends of the rectifying member 21a may be fixed. And again, FIG.
As shown in a, the inner diameter of the guide sleeve 18 is
1 may be smaller than the outer diameter of the boss portion, and the guide sleeve 1
The end surface of 8 is attached to the boss surface of the rectifying member 21, and since the water flow does not flow out from the inside of the guide sleeve 18 to the outer peripheral side of the boss surface of the rectifying member 21, turbulent flow does not occur and the guide sleeve 18 It is possible to properly maintain the rectified state of the water liquid outside. At the same time, the guide sleeve 18 can be stably supported by the boss surface. Moreover, as shown in FIGS. 12 to 14, the guide sleeve 18 may be formed integrally with the open / close piston valve 19. In addition, the upstream end of the open / close piston valve 19 can be formed in a truncated cone shape as shown in FIG. 1, a hemispherical shape as shown in FIG. 5, or a sharp conical shape as shown in FIG.

According to the descaling nozzle 10 with a built-in open / close piston valve according to the present invention formed as described above, the collision pressure on the rolled steel plate can be increased as shown by the line X in FIG. It has been found that the bed descaling effect is significantly improved in the product.

Further, since the descaling nozzle 10 with a built-in on-off valve according to the present invention has a straight bar shape as a whole, and the upstream end, that is, the rear end serves as an inlet for water liquid, the existing water supply as shown in FIG. It can be easily attached to the head 30. In this case, a separate adapter 30a that comes into liquid-tight contact with the water supply header 30 as is clear from FIG.
The cap 32 may be attached and installed between the guide adapter 33 and the chip holder 34. At this time, the rear end of the adapter 30a and the contact portion between the outer wall surface of the water supply header 30 and the abutment portion may be sufficiently liquid-tight so that an appropriate gasket (not shown) can be interposed. 18 is the same as that of the embodiment shown in FIG. 1, and in FIG. 18, 20 is added to the number used in FIG.

[0018]

According to the descaling nozzle with a built-in open / close piston valve of the present invention configured as described above, the liquid is supplied at the upstream end thereof, so that the structure is simple and has sufficient durability. , The sealing property is provided, and a sufficiently long flow path is secured for the water / liquid flow, so that a good rectifying / pressure increasing effect is given to the water / liquid flow toward the output chip, so that a desired collision pressure can be applied to the rolled steel sheet. Therefore, it is possible to eject the water-liquid flow, and achieve the effects such as highly realizing the descaling effect.

[Brief description of drawings]

FIG. 1 is a side view showing a half body of a descaling nozzle with a built-in open / close piston valve according to the present invention in section.

2 is a partially enlarged cross-sectional view of the descaling nozzle of FIG.

FIG. 3 is a partial end view of the descaling nozzle of FIG.

FIG. 4 is a partially enlarged sectional view of the descaling nozzle of FIG.

FIG. 5 is a partially enlarged sectional view of another embodiment of a descaling nozzle with a built-in open / close piston valve according to the present invention.

6 is a partial cross-sectional view of the descaling nozzle of FIG.

FIG. 7 is a partially enlarged cross-sectional view of another embodiment of a descaling nozzle with a built-in open / close piston valve according to the present invention.

FIG. 8 is a partial cross-sectional view of the descaling nozzle of FIG.

FIG. 9 is a partially enlarged cross-sectional view of another embodiment of a descaling nozzle with a built-in open / close piston valve according to the present invention.

10 is a partial end view of the descaling nozzle of FIG.

FIG. 11 is a partial perspective view of the descaling nozzle of FIG.

FIG. 11a is a partial enlarged view of an embodiment of an open / close piston valve type descaling nozzle according to the present invention.

FIG. 12 is a partial cross-sectional view of another embodiment of a descaling nozzle with a built-in open / close piston valve according to the present invention.

13 is a partial cross-sectional view of the descaling nozzle of FIG.

FIG. 14 is a partial end view of the descaling nozzle of FIG.

FIG. 15 is a partial cross-sectional view of another embodiment of a descaling nozzle with a built-in open / close piston valve according to the present invention.

FIG. 16 is a graph showing the collision pressure between a descaling nozzle with a built-in open / close piston valve according to the present invention and a conventional open / close valve type descaling nozzle.

FIG. 17 is an explanatory view showing a state where a descaling nozzle with a built-in open / close piston valve according to the present invention is attached to a water supply header.

FIG. 18 is a side view showing, in cross section, a half body of another embodiment of the descaling nozzle with a built-in open / close piston valve according to the present invention.

FIG. 19 is a side view showing a half of a conventional descaling nozzle with a built-in on-off valve in cross section.

[Code]

10 Descaling Nozzle with Built-in Open / Close Piston Valve 10a Flow Path 11 Strainer Assembly 12 Chip Assembly 13 Guide Adapter 14 Chip Holder 15 Valve Adapter 15a Valve Seat 16 Strainer Main Body 17 Inlet Slot 18 Guide Sleeve 18a Guide Sleeve 19 Open / Close Piston Valve 20 Spring 21 Straightening member 21a Straightening member 22 Chip body 23 Spouting chip 30 Water supply header

Front page continued (72) Inventor Masaki Yamamoto 487-7 Iikura, Yokaichiichi, Chiba Prefecture Employment promotion 2-202 (72) Inventor Yasuomi Akechi 1613-2 Egasaki, Asahi City, Chiba Prefecture

Claims (4)

[Claims] 1. A descaling nozzle having a built-in open / close piston valve, in which an opening / closing piston valve 19 for the introduction port is installed downstream of the water liquid introducing port at the rear end of the nozzle, and an ejection chip 23 is attached to the tip of the nozzle. In FIG. 10, the open / close piston valve 19 is supported by a support body 19a capable of piston operation on the nozzle axis, and the upstream side of the support body 19a is supported by a guide sleeve 18 on the nozzle body side so that the piston can operate. A spring 20 in a compressed state is arranged between the guide sleeve 18 and a support body 19a of the opening / closing piston valve 19, and a passage having an annular section is formed between the support body 19a and the inner peripheral wall surface of the nozzle body. A rectifying member 21 is provided between the inner wall surface of the nozzle body and the inner wall surface of the nozzle body. 2. A built-in opening / closing piston valve in which an opening / closing piston valve 19 for the inlet and a rectifying member 21 are installed downstream of a water liquid inlet at the rear end of the nozzle, and an ejection chip 23 is attached to the tip of the nozzle. In the descaling nozzle 10 of the mold, the open / close piston valve 19 is supported by a support body 19a capable of piston operation on the nozzle axis, and the upstream side of the support body 19a is supported by the guide sleeve 18 on the nozzle body side so as to be piston operable. A compressed spring 20 is disposed between the open / close piston valve 19 and the guide sleeve 18, and a flow passage having an annular cross section is formed between the spring 20 and the open / close piston valve 19 and the inner peripheral wall surface of the nozzle body. Sleeve 1 for forming
8 and a rectifying member 21a are arranged. 3. A built-in open / close piston valve in which an opening / closing piston valve 19 for the introduction port and a rectifying member 21 are provided in the downstream of the water liquid introduction port at the rear end of the nozzle, and an ejection chip 23 is attached to the tip of the nozzle. In a mold descaling nozzle 10, the open / close piston valve is supported by a support body 19a capable of piston operation on the nozzle axis, and the upstream side of the support body 19a is supported by a guide sleeve 18 on the nozzle body side so as to be piston operable. A compressed spring is arranged around the open / close piston valve 19 and the guide sleeve 18, and the guide sleeve 18 surrounding the spring 20 is integrally formed on the upstream extension of the open / close piston valve 19. A flow path having an annular cross section is formed between the outer peripheral surface of the guide sleeve 18 and the inner peripheral wall surface of the nozzle body. A descaling nozzle, which is formed and in which a rectifying member 21a is disposed upstream of the rectifying member 21 in this flow path. 4. The descaling nozzle according to claim 1, wherein the downstream end surface of the opening / closing piston valve 19 is formed on any one of a spherical surface, a conical surface, and a truncated cone surface. .