JPH06346333A - Nozzle - Google Patents

Abstract

PURPOSE:To prevent the leak of fluid from the circumferential edge of a nozzle plate by pressing a nozzle plate against a sealing member by the fluid pressure acting on a pressure-receiving member inserted in a hollow chamber of a channel. CONSTITUTION:This nozzle for the entanglement of fibers of a web has the following structure. A pressure-receiving member 14 is inserted in a state slidable in the flow direction of a fluid such as water into a hollow chamber 13 placed before the ejection port 12 of a channel 11 having the ejection port 12 at an end. A flow channel 15 for the supplied fluid is formed on the pressure- receiving member 14. The channel is composed of grooves 18 formed on both side faces of a large-diameter part 16 and a through-hole 19 opened from both side faces of a small-diameter part 17 toward the axis. The fluid flow from the channel 11 to the hollow chamber 13 presses the terminal end of the pressure-receiving member 14 to slide the member 14 toward the ejection port 12. The nozzle plate 20 is pressed against the seal member 22 inserted into the groove 21 by this process to seal the nozzle assembly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for fiber entanglement of a web used in a process for producing a nonwoven fabric, for example.

[0002]

2. Description of the Related Art For the entanglement of fibers in the process of manufacturing a nonwoven fabric, as shown in FIG. 6, water jets from nozzles 2 arranged above the carrier side of a web A transfer net conveyor 1 are used.

The water sprayed on the web A is collected by a suction box 3 arranged below the carrier side of the net conveyor 1 so as to face each nozzle 2.

In the nozzle used for the entanglement of fibers as described above, water is jetted from a nozzle plate interposed in front of the jet port.

The above-mentioned nozzle plate is conventionally provided with a hollow chamber in the passage in front of the injection port, and is incorporated in this hollow chamber.
The peripheral edge of the nozzle plate is brought into pressure contact with the end face of the hollow chamber on the injection port side by water pressure.

A groove is formed on the surface of the hollow chamber facing the peripheral edge of the nozzle plate, and a seal member is fitted in the groove.

[0007]

According to the above structure, the nozzle plate receives the pressure of the supplied water, and the peripheral edge of the surface of the nozzle plate is pressed against the seal member.
A part of the feed water pumped into the hollow chamber goes from the peripheral edge of the nozzle plate to the surface of the nozzle plate.

Therefore, there is a problem that the nozzle plate cannot be satisfactorily pressed against the seal member, and water that does not pass through the nozzle plate is directed to the jet port.

Therefore, an object of the present invention is to make the nozzle plate come into good pressure contact with the seal member.

[0010]

In order to solve the above problems, the present invention provides a passage having an injection port at a terminal, a hollow chamber provided in front of the injection port of the passage, and a hollow chamber provided in the hollow chamber. A pressure receiving member that is slidable in the direction of fluid flow and has a distal end surface incorporated to receive the supply fluid pressure, and the supply fluid passes through the pressure receiving member from the end of the pressure receiving member to a position facing the passage at the tip. A nozzle plate interposed between the end face of the hollow chamber on the injection port side and the pressure receiving member, and a sealing member fitted in a groove provided on the end face of the hollow chamber on the injection port side. A nozzle consisting of and is adopted.

[0011]

The fluid pressure of the fluid flowing from the passage toward the hollow chamber acts on the end face of the pressure receiving member.

The pressure receiving member, which receives the fluid pressure on the end face, slides toward the injection port, and presses the nozzle plate against the end face of the hollow chamber on the side having the injection port via the pressure receiving member.

On the other hand, the fluid on the front side of the pressure receiving member goes through the flow path toward the jet port and is sprayed from the jet port.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, 11 is a passage having an injection port 12 at a terminal, and the injection port 12 of this passage 11 is shown.
A hollow chamber 13 is provided in front of.

In the hollow chamber 13, a pressure receiving member 14 which is slidable in the flow direction of the fluid and which receives the pressure of the supplied fluid is incorporated in the end face.

Further, the pressure receiving member 14 has a flow path 15 for allowing a fluid to pass therethrough from a distal end to a position facing the passage 11 at the tip.
Is provided.

As shown in FIG. 3, the flow path 15 includes a large-diameter portion 16 and a small-diameter portion 17 protruding from the front surface of the large-diameter portion 16 toward the injection port 12 to form the pressure receiving member 14. Grooves 18 formed on both side surfaces of the large-diameter portion 16 as well as formed,
From the both side surfaces of the small diameter portion 17 face each other in the axial direction, and
When forming the flow path 15 with the through hole 19 communicating with the front surface of the small diameter portion 17, or as shown in FIG. 4, a through hole 19 ′ (not limited to one shown) is formed in the shaft core of the pressure receiving member 14. Some are provided.

As shown in FIGS. 1 to 3, the seat plate 32 is airtightly fixed by welding or the like in the axial direction of the outer peripheral surface of the pipe 31, and the surface of the seat plate 32 and the pipe 31 are fixed.
The inside is communicated with a myriad of small holes 33 that also serve as rectification, and is detachably attached to the surface of the seat plate 32 via a fastener 34, and a plate member 36 is attached in an airtight manner by a seal member 35. In the body 36, the passage 11 with the injection port 12 communicating with the small hole 33, the hollow chamber 13 along the longitudinal direction of the pipe 31 in the middle of the passage 11, and the horizontally long plate-shaped pressure receiving member 14 are incorporated in the hollow chamber 13. If set, a large number of nozzles can be provided in one pipe 31.

A nozzle plate 20 is interposed between the end face of the hollow chamber 13 on the injection port 12 side and the pressure receiving member 14.

Reference numeral 21 is a groove provided outside the inflow end of the injection port 12 and provided in the end surface of the hollow chamber 13. A seal member 22 is fitted in the groove 21.

With the above-mentioned structure, the pressure of the fluid (compressed water) flowing from the passage 11 to the hollow chamber 13 acts on the end face of the pressure receiving member 14.

The pressure receiving member 14 which receives the fluid pressure on the end face,
Since the nozzle plate 20 is pressed against the end face of the hollow chamber 13 on the side having the injection port 12 via the pressure receiving member 14 while sliding in the direction of the injection port 12, the sealing member 22 causes the surface (the injection port 12 from the peripheral edge of the nozzle plate 20). There is no fluid leakage to the side).

On the other hand, the fluid on the front side of the pressure receiving member 14 is ejected toward the ejection port 12 through the flow path 15.

In the figure, 41 is a filter and 42 is a nozzle hole.

[0026]

Since the nozzle according to the present invention is configured as described above, it is possible to press the nozzle plate against the seal member by the pressure receiving member to stop the leakage of fluid that does not pass through the nozzle plate.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a nozzle of the present invention.

FIG. 2 is an enlarged side view of the vertical section of the above.

FIG. 3 is an enlarged vertical cross-sectional side view showing an upper part.

FIG. 4 is an enlarged vertical side view showing an embodiment with different flow paths.

FIG. 5 is an exploded perspective view showing a main part.

FIG. 6 is a side view showing a usage state.

[Explanation of symbols]

 11 Passage 12 Injection Port 13 Hollow Chamber 14 Pressure-Receiving Member 15 Flow Path 16 Large Diameter Part 17 Small Diameter Part 18 Groove 19, 19 'Through Hole 20 Nozzle Plate 22 Sealing Member

Claims (1)

[Claims] 1. A passage having an injection port at a terminal, a hollow chamber provided in front of the injection port of the passage, a slidable flow direction of the fluid in the hollow chamber, and a supply fluid pressure applied to a distal end face. A pressure receiving member incorporated so as to receive pressure, a flow passage provided in the pressure receiving member so as to pass a supply fluid from a terminal end of the pressure receiving member to a position facing the passage at the tip, and an end face of the hollow chamber on the injection port side. A nozzle plate interposed between the pressure receiving member and the pressure receiving member, and a seal member fitted in a groove provided in an end surface of the hollow chamber on the injection port side.