JPH037670Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flow path dividing device that is inserted into a fluid flow path to partition the flow path.

[Prior Art] As shown in FIG. 5, a directional control valve 4 is provided with a plurality of fluid passages 2, . ，
It is already known that a plurality of actuators 5, . . . are respectively driven by .

In this case, the fluid pressure supplied to some actuators may be changed from that of other actuators, or
Alternatively, in order to exhaust some actuators and other actuators separately, as shown in FIG. need to be sectioned.

Conventionally, as the above-mentioned flow path dividing device, for example, one described in Japanese Utility Model Application Publication No. 60-93089 is known.

The above-mentioned known flow path dividing device moves the opening/closing member inserted into the annular packing inside the flow path in a closed state, and opens the opening/closing member at a desired position, thereby pressing the packing against the inner wall of the flow path. Then, the flow path is divided and the device is fixed by packing.

However, in the above-mentioned known flow path partitioning device, the packing has two functions: partitioning the flow path and fixing the device, so if the opening/closing member is opened too much, the packing is strongly pressed against the flow path, resulting in poor durability. If the force is reduced and the opening/closing member is opened to a small extent, the fixing force of the partitioning device becomes small, and there is a problem that the partitioning device moves due to the differential pressure of the fluid acting on the sides of the device.

[Problems to be solved by the invention] The present invention uses a fixing member provided separately from the sealing member that partitions the flow path to firmly fix the partitioning device to the flow path without applying a large force to the sealing member. The problem to be solved is to fix the

[Means for Solving the Problems] The flow path dividing device of the present invention includes a piston disposed in the flow direction of the flow path, a fixed member, and a pressing member that presses these, and is movable within the flow path. The piston is a plate body having a sealing member on the outer periphery for sealing the flow path, and expanding the diameter of the fixing member by the pressure of the pinching member to press it against the inner wall of the flow path. The above-mentioned problems are solved.

[Operation] When the pinching member is not pinched, no compressive force acts on the fixing member, so the partitioning device can move within the flow path.

When the pinching member is pinched, the diameter of the pinching member expands due to the pinching pressure and comes into pressure contact with the inner wall of the channel, so that the partitioning device can be fixed at any position in the channel.

In this case, the compressive force due to the squeezing pressure does not act on the seal ring attached to the outer circumference of the piston, so
Even if the device is firmly fixed with a large clamping force, the seal ring will not be deformed.

Further, when the piston is pressed toward the fixed member by the fluid pressure, the fixed member is compressed and more firmly presses against the inner wall of the flow path, so that the partitioning device does not move within the flow path.

[Embodiment] FIG. 1 shows a first embodiment of the present invention, and this flow path dividing device 10 includes a piston 12 disposed in the flow direction of a flow path 11, and a fixing member 1 made of two plates.
3 and 13, and a bolt 15 and a nut 18 that constitute a clamping member 14 that clamps them.

The piston 12 has an axial through hole 1 in the center.
A sealing member 19 that contacts the inner wall of the flow path to airtightly seal the flow path 11 is attached to the groove formed on the outer periphery having a diameter smaller than the inside diameter of the flow path.

The fixing member 13 is made of a disc spring made of a strong material with a large restoring force such as spring steel, has an axial through hole 20 in the center, and is curved concavely from the periphery toward the center. It is formed to have a slightly smaller diameter than the inner diameter of the flow path 11 when not receiving an axial compressive force, and a larger diameter than the inner diameter of the flow path 11 when deformed by the compressive force.

In addition, as shown in FIG. 4, the fixing member 13 is
A plurality of notches 22, . . . extending from the periphery toward the center may form a chrysanthemum shape.
3, ... bite into the inner wall of the flow path 11 independently, so that the fixing member 13 can be fixed even more firmly.

The nut 16 has a screw hole into which the bolt 15 is screwed into the inner periphery of a protrusion 25 extending toward the bolt side, and a groove 26 for inserting a rotary instrument on the end surface, and includes a piston 12, a fixing member 13, 13 is disposed concentrically with the nut 16 by loosely fitting the through holes 18, 20, 20 into the protrusion 25.

Although not shown, it goes without saying that the bolt 15 also has a groove for inserting a rotating instrument.

In the first embodiment, the protrusion 25 of the nut 16 has
Loosely fit the piston 12 into the two fixing members 13, 13 facing each other in the center, and insert the bolt 15 into the nut 16.
Insert it into the flow path 11 with the screw slightly screwed into the hole. In this case, the clamping force of the bolts and nuts does not act on the fixing members 13, 13, so the partitioning device 10 can move within the flow path 11.

After moving the partitioning device 10 to a desired position, when the bolts 15 and nuts 16 are tightened with an appropriate tool, the fixing members 13, 13 are compressed and expanded in diameter by the clamping force of the bolts and nuts. Since the peripheral edge is pressed against the inner wall of the channel 11, the partitioning device 10 is fixed within the channel 11.

In this case, when the tightening force of the bolts and nuts is increased, the fixing members 13, 13 come into firm pressure contact with the flow path 11, but this pressure contact force does not act on the sealing member 19, so the sealing member 19 is not affected by the tightening force. No compression deformation occurs.

Further, when the fluid pressure of the flow path 11 acts on the partitioning device 10 and the piston 12 is pressed toward the fixed member 13 side, the fixed members 13, 13 also expand in diameter due to this, so the partitioning device 10 It will not move even if there is a large difference in fluid pressure on both sides. Therefore, when fluid pressure acts only from the piston 12 side of the partitioning device 10, the number of the fixing members 13 may be one.

When the clamping force of the clamping member 14 is loosened, the fixing member 1
3 returns to its original state, the partitioning device 10 becomes movable within the flow path 11.

FIG. 2 shows a second embodiment of the present invention, in which a piston 28 has a protrusion 29 on the nut side, and fixing members 13, 13 and an annular auxiliary plate 30. By loosely fitting the through hole into the protrusion 29, these are arranged concentrically with the piston 28, and the nut 31 is a normal hexagonal nut.

Other configurations and functions of the second embodiment include the fixing member 1
3 and 13 are the same as the first embodiment except that they are compressed by the piston 28 and the auxiliary plate 30, so the same reference numerals are given in the drawings and detailed explanation will be omitted.

FIG. 3 shows a third embodiment of the present invention, in which fixing members 33, 3 in a flow path dividing device 32 of the third embodiment are shown.
3 has an annular intermediate plate 34 between opposing concave surfaces, the through hole of which is connected to the protrusion 25 of the nut 16.
They are arranged concentrically by loosely fitting into the
A packing 35 that seals between the bolt 15 and the end surface of the piston 12 is fitted.

Other configurations and functions of the third embodiment include the pinching member 1
The second embodiment is the same as the first embodiment except that the fixing members 33, 33 expand in diameter by the intermediate plate 34 when the bolt 4 is compressed, and the space between the bolt 15 and the piston 12 is sealed by the packing 35. The same reference numerals are used in the drawings, and detailed explanations are omitted.

[Effects of the invention] The present invention uses a plate body that expands the diameter of the fixing member provided separately from the sealing member and comes into pressure contact with the inner wall of the flow path by squeezing pressure in the axial direction, so it has an extremely simple structure. Since the partitioning device can be firmly pressed against the flow path and can be prevented from moving, and the clamping force of the clamping member does not act on the sealing member, the durability of the sealing member can be improved.

[Brief explanation of the drawing]

1 to 3 are longitudinal sectional front views showing different embodiments of the present invention, FIG. 4 is a perspective view of the fixing member, FIG. 5 is a schematic configuration diagram of an application example of the flow path dividing device, and FIG.
The figure is a longitudinal sectional front view of the main part showing a state in which the flow path is divided. 10, 27, 32...channel division device, 11...
Channel, 12, 28... Piston, 13, 33...
Fixing member, 14...Pinching member, 19...Sealing member.

Claims (1)

[Claims for Utility Model Registration] A flow path dividing device movable within a flow path, comprising a piston disposed in the flow direction of a flow path, a fixing member, and a pressing member that presses these, the piston as described above. is characterized in that it has a sealing member on its outer periphery that seals the flow channel, and the fixing member is constituted by a plate whose diameter expands due to the pressure of the pinching member and comes into pressure contact with the inner wall of the flow channel. Channel division device.