JPH07118999A - On-off valve in fluid jet loom - Google Patents

Abstract

PURPOSE:To provide an on-off valve in a fluid jet loom, enabling water or air to be fed stably into a picking nozzle and also improved in durability. CONSTITUTION:In an on-off valve incorporated in between a picking nozzle 11 and a pump to force-feed a pressurized fluid, a housing 1 with a flow channel opened facing on the pump side and picking nozzle side is slidably incorporated with a valve body 5 in its on-off valve-actuating direction, and the valve body gets away from the part to be opened against the pump side by feeding the pressurized fluid from the pump side, effecting allowing the valve to be opened. Concurrently, the opening on the pump side is closed by the magnetic repulsive force of magnets 6, 7 incorporated respectively in the valve body and the housing, effecting valve-closing actuation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve provided downstream of a water jet pump for supplying pressurized water to a weft inserting nozzle of a water jet loom (water jet loom).

[0002]

2. Description of the Related Art A water jet pump for supplying pressure water to a weft insertion nozzle of a water jet loom at the same time as the loom has been conventionally used. The basic configuration of this pump is built in the flow path between the water source side and the weft insertion nozzle, and the reciprocating motion of the piston in the cylinder is used to draw water from the water source side and to the nozzle side. The pressure water can be sent out.

In order to supply the pressure water from the pump at the timing of the weft yarn feeding from the loom, an on-off valve is incorporated in the flow path between the pump and the weft inserting nozzle. This on-off valve is provided with two ball-shaped valve bodies for suction and discharge in a portion communicating with a bore provided with a reciprocating cylinder, as described in, for example, Japanese Utility Model Laid-Open No. 62-129083. There are different configurations.

In such an on-off valve, the ball-shaped valve elements on the suction side and the discharge side are moved by the operation of the reciprocating cylinder to open and close the respective flow paths, whereby the weft and the weft are supplied at the timing of supply. Pressure water can be supplied to the inlet nozzle side.

There are various other open / close valve mechanisms. In the case of a water jet in which the pressure water supply interval and the opening / closing time are extremely short, the flow of water is used to move the valve. In many cases, the valve body is designed so that it can move freely because the configuration of controlling the valve is the simplest.

[0006]

However, when the ball-shaped valve element is incorporated in the opening / closing valve housing, it is necessary to allow the valve element to move in the opening / closing direction of the flow path. In addition, a ball-shaped valve body has all degrees of freedom, and there is no other choice but to enclose the valve body in a space slightly larger than that.

When the valve body itself has a degree of freedom as described above, vibration is likely to occur in the flow of water during the transitional period when the valve body itself shifts from the closed valve to the opened valve. Therefore, the rate of increase of the valve opening degree from the initial opening to the final opening is not always stable. Therefore, the use of a ball-shaped valve body from a microscopic point deviates from the optimum flow and is not preferable for use in a water jet in which timing is very important.

Further, the valve element comes into contact with the valve seat wall around the valve element each time the valve element is opened and closed, and violently abuts against the valve seat wall due to vibration or the like. Therefore, the problem of wear of the valve body and the valve seat wall cannot be ignored.

As described above, in the conventional opening / closing valve mechanism for the water jet loom, there are still problems in the influence of the propagation of the vibration to the pressure water flow due to the vibration of the valve body and the durability of the opening / closing valve itself. .

An object to be solved in the present invention is to provide an on-off valve which enables stable supply of water to a weft insertion nozzle in a fluid jet loom and has improved valve durability.

[0011]

SUMMARY OF THE INVENTION The present invention is an on-off valve incorporated between a pump for pumping pressure fluid and a weft insertion nozzle, one end of which is on the pump side and the other end of which is on the weft insertion nozzle. A housing that is open toward each side, a valve body that is slidably installed in the housing so as to be movable in a direction that opens and closes a portion that opens toward the pump side, and between the valve body and the housing. And a magnet that repulsively urges the valve element to a portion opened toward the pump side, the valve element being capable of being restrained in its closed position by the repulsive urging force of the magnet. The valve body can be opened according to the pressure of the pressure fluid from.

The housing is composed of at least two members, and one member of the members is provided with an opening downstream of the valve body and facing the flow path to the weft insertion nozzle side, and this opening is provided. The member can be shifted with respect to other members, and the flow passage area to the weft insertion nozzle side can be changed according to the shift.

[0013]

Since the valve body is slidably incorporated in the housing, the valve body can be moved in the axial direction toward the portion opened toward the pump side, for example, and the opening can be moved depending on the moving position. A valve mechanism that opens and closes can be formed. Then, the valve body obtains the acting force in the valve closing direction by the repulsive force of the magnet incorporated in itself and the magnet on the housing side. The valve body can be opened and closed according to the timing of supply / stop of the pressure fluid.

Further, if the valve body is formed into a cone shape capable of entering the opening and the peripheral surface thereof is seated on the valve seat of the opening, the increase rate and the decrease rate of the valve opening degree at the time of opening the valve are moderate. Can be Therefore, there is no large opening of the flow path and the phenomenon such as pulsation in the flow path is suppressed.

Further, if the housing is composed of at least two members and the flow passage area to the weft inserting nozzle side downstream of the valve body is changed by shifting the members, a pressure suitable for the weft inserting condition is obtained. Water can be released.

[0016]

1 is a longitudinal sectional view showing an on-off valve of the present invention incorporated in a flow path for supplying pressure water to a weft insertion nozzle of a water jet loom, and FIG. 2 is a view taken along the line AA of FIG. FIG.

In the figure, a housing 1 for an on-off valve is installed in a socket 50 and a bushing 51 which are installed in a pressure water supply passage from a pump (not shown) to a weft insertion nozzle (not shown). There is.

The housing 1 forming the outer shell of the on-off valve is
This is a combination of a retainer 2 having a vertical cross section of a double pipe, a valve seat ring 3 integrated with an upstream end surface thereof, and a guide ring 4 fixed to a downstream end surface thereof.

The retainer 2 is provided with a plurality of flow passage holes 2a arranged in an annular shape in the axial direction, and a guide block 2b for holding a valve body 5 in the center thereof slidably in the axial direction.
To provide. Inside the guide block 2b, the valve body 5
An annular seat 2c that restricts the stroke is formed and a sleeve 2d is provided on the axis. A port hole 2e is opened in the sleeve 2d in the axial direction, and a magnet 6 is incorporated around the port hole 2e between the sleeve 2d and the annular seat 2c.

The valve body 5 is installed so as to be movable coaxially with the retainer 2, and has a valve hole 3 of the valve seat ring 3 at one end.
The cone 5a that enters the a is formed. Also, the valve body 5
A guide 5b having an annular cross section that slides between the inner circumferences of the retainer 2 having the magnet 6 is formed on the outer periphery of the magnet, and the polarity is reversed at a position inside the guide 5b that faces the magnet 6 of the retainer 2. 7 is provided. These magnets 6 and 7 are permanent magnets, and the repulsive force of the respective arrangements causes the valve body 5 to move to the position shown in FIG.
At, the valve is kept closed by receiving the action force that is always pushed to the left.

A cone 5 is provided in the valve hole 3a formed in the valve seat ring 3.
A frustoconical valve seat 3b that matches the taper of a is formed.
When the valve body 5 is in the valve-closed state as shown by the repulsive force of the magnets 6 and 7, the tip of the guide 5b and the annular seat 2
A gap is formed between the valve body 5 and c, and the valve body 5 can be stroked by this gap.

A flow passage hole 4a is formed in the guide ring 4 so as to surround one end of the guide block 2b of the retainer 2 so that an annular flow passage can be formed between the guide ring 2 and the guide block 2b.

In the above construction, the pump is operated in synchronization with the operation of the loom and the pressure water is supplied to the socket 50.
When supplied from the side, the valve body 5 that has been closed by the repulsive force between the magnets 6 and 7 is pushed to the right side in FIG. 1 by the water pressure. This causes the cone 5a to move into the valve seat 3b.
The pressure water flows through the flow passage hole 2a of the retainer 2 to the bushing 51 side, and is supplied to the weft inserting nozzle side.

At the time when the supply of the pressurized water by the pump is stopped, the repulsive force by the magnets 6 and 7 causes the valve element 5 to
Moves toward the valve seat ring 3 side, and the cone 5a is seated on the valve seat 3b to close the valve.

As described above, by utilizing the load of the water pressure by the pressure water and the repulsive force between the magnets 6 and 7, it is possible to open and close the flow path in accordance with the supply of the pressure water from the pump. During this opening / closing operation, the valve body 5 is guided by the retainer 2 in the axial direction thereof, so that the valve body 5 may vibrate around the axis even when it moves in response to the hydraulic pressure and the repulsive force between the magnets 6 and 7. There is no. For this reason,
The influence of vibration on the pressure water can be eliminated, and the weft can be stably conveyed from the weft inserting nozzle.

Further, since the vibration of the valve body 5 is suppressed, the flow path resistance to the pressure water is reduced and the pressure loss is also reduced as compared with the case of using the conventional ball-shaped valve body. Further, the occurrence of wear on the sliding surface between the valve body 5 and the retainer 2 and the contact surface with the valve seat 3b is suppressed, and the durability is also improved.

FIG. 3 is a longitudinal sectional view of a main part showing an example in which the on-off valve of the present invention is incorporated in the body of the weft inserting nozzle.

Into the main body block 10 of the weft inserting nozzle, a weft inserting nozzle 11 for discharging a weft is incorporated so that its axis line is substantially horizontal, and an orifice 12 is provided around the open end of the weft inserting nozzle. The surroundings of the nozzle 11 and the orifice 12 can be connected to a pressure water supply passage on the pump side.

The main body block 10 is provided with a hollow portion 10a which opens toward the lower end side thereof and communicates with the orifice 12 side, and the housing 1 of the on-off valve shown in FIGS. 1 and 2 is incorporated therein. The guide ring 4 of the housing 1 faces the orifice 12 side, and the valve seat ring 3 has the hollow portion 10a.
Insert it so that it faces the open end.

From the lower end of the cavity 10a, the flange 13a of the supply pipe 13 connected to a pump (not shown) is inserted,
A seal packing 13b is incorporated between the flange 13a and the valve seat ring 3. Then, the nut 14 externally inserted into the supply ring 13 is screwed into the main body block 10, thereby tightening the flange 13a to connect the pipes,
The housing 1 is fixed in the flow path.

The housing 1 of the on-off valve is a weft insertion nozzle 11
And located near the flow path on the side of the orifice 12, and as described in the previous example, the valve body 5 opens the flow path by the supply of pressure water from the pump and closes the valve due to the repulsive force between the magnets 6 and 7. repeat.

Thus, if the on-off valve is arranged near the weft insertion nozzle 11 and the orifice 12 and near the position where the pressure water merges with the weft and discharges it, the distance from the on-off valve to the discharge end of the weft. Also becomes shorter. Therefore, the pressure loss of the pressure water from the flow path hole 4a of the guide ring 4 to the orifice 12 is small, and the occurrence of vibration due to the bending of the flow path shape is suppressed.

Further, as described in the previous example, the movement of the valve body 5 of the on-off valve is more stable than that of the conventional ball valve structure, so that the pressure of water when passing through the on-off valve itself. Fluctuations and vibrations in the flow paths due to the fluctuations are also suppressed. Therefore, by arranging the opening / closing valve near the orifice 12 or the weft inserting nozzle 11, phenomena such as pulsation of pressure water toward the discharge end on the downstream side are suppressed, and the weft is discharged in a more stable state reliably. To be done.

FIG. 4 is a vertical cross-sectional view of a main part showing another example of the structure for incorporating the opening / closing valve into the main body block 10 of the weft inserting nozzle.

In this example, an adapter 15 is connected to the main body block 10 so that a flow path is communicated with the orifice 12 side, and the housing 1 of the on-off valve is incorporated in the adapter 15. The connection between the adapter 15 and the supply ring 13 is made by a nut 16 for fastening the flange 13a and the packing 13b to the lower end of the housing 1 of the on-off valve, as in the previous example.

Also in this built-in example, the vibration of the pressure water can be suppressed by the operation of the valve body 5 of the on-off valve, and even if the flow path to the orifice 12 is longer than in the case of FIG. Good release.

FIG. 5 is a vertical cross-sectional view of the main part showing an example in which the flow rate can be adjusted by changing the flow passage area of the annular flow passage hole 4a between the guide ring 4 and the guide block 2b.

In this example, as in the case shown in FIG. 1, magnets 6 and 7 are used to obtain the urging force in the valve closing direction of the valve body 5, and the retainer 2 and the guide ring 4 are screwed together. The only difference is that 2f and 4b are joined.

By joining the screws 2f and 4b as described above,
The guide ring 4 is movable in the axial direction with respect to the retainer 2, and the distance from the peripheral surface of the guide block 2b can be changed. Therefore, the capacity of the pump and the weft insertion nozzle 11
If the position of the guide ring 4 is set so as to obtain the flow rate of the pressure water suitable for the conditions such as the discharge force of the weft yarns from Insertion is achieved. It should be noted that making the guide ring 4 movable is similarly applicable to the configurations shown in FIGS. 3 and 4.

[0040]

According to the present invention, the valve body is incorporated into the flow path by the sliding structure, and the force for closing the valve body is performed by utilizing the repulsion of the magnet. It is stable and stable and does not affect the flow such as pulsation and the like, and the weft is satisfactorily pumped.

Further, since the valve closing operation of the valve body is performed by the magnetic repulsion force of the magnet, the durability is improved as compared with the case where a mechanical means such as a spring is used, and the degree of freedom in design and the compactness are improved. It will be possible.

Furthermore, by moving a part of the housing to change the flow passage area to the weft insertion nozzle side to adjust the flow rate, it is possible to discharge pressure water suitable for various weft yarns, which is even better. Weft insertion is possible.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an opening / closing valve in a fluid jet loom of the present invention.

FIG. 2 is a vertical sectional view taken along the line AA of FIG.

FIG. 3 is a longitudinal sectional view of a main part showing an example in which the on-off valve of FIG. 1 is incorporated into a main body block of a weft insertion nozzle.

FIG. 4 is a vertical cross-sectional view of a main part showing an example in which an adapter is connected to a main body block of a weft insertion nozzle and an opening / closing valve is incorporated in the adapter.

FIG. 5 is a vertical cross-sectional view of a main part showing an example in which a guide ring is screwed to a retainer to adjust the opening degree of a flow path hole.

[Explanation of symbols]

 1 Housing 2 Retainer 3 Valve Seat Ring 4 Guide Ring 5 Valve Body 5a Cone 5b Guide 6 Magnet 7 Magnet 10 Body Block 10a Cavity 11 A Weft Insertion Nozzle 12 Orifice 13 Supply Pipe 13a Flange 13b Packing 14 Nut 15 Adapter 16 Nut

Claims (2)

[Claims] 1. An on-off valve incorporated between a pump for pumping a pressure fluid and a weft insertion nozzle, the housing having one end open to the pump side and the other end opened to the weft insertion nozzle, respectively. A valve body slidably incorporated in the housing so as to be movable in a direction of opening and closing a portion opened toward the pump side, and the valve body provided between the valve body and the housing, respectively. A magnet that repulsively urges a portion opened toward the pump side is provided.The repulsive urging force of the magnet enables the valve body to be restrained in its closed position, and the pressure fluid from the pump is responsive to the pressure. A valve for opening and closing the valve body in a fluid-jet loom. 2. The housing is composed of at least two members, and one of the members is provided with an opening which is downstream of the valve body and faces a flow path to the weft inserting nozzle side, 2. An on-off valve for a fluid jet loom according to claim 1, wherein a member provided with an opening can be shifted with respect to another member, and a flow passage area toward the weft inserting nozzle side can be changed according to the shift.