JPH0433446Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pipe attachment device for fluid equipment that utilizes fluid pressure or vacuum pressure.

[Prior Art] The use of a pipe joint to which a double pipe can be connected for supplying and discharging pressure fluid is already known, for example, from Japanese Utility Model Application Publication No. 51-133011.

However, in the above-mentioned known pipe joint, it is necessary to connect the radial port provided in the pipe joint and one port of the directional control valve or double-acting actuator with another pipe other than the double pipe. As a result, not only the efficiency of piping work was reduced, but also the efficiency of work such as equipment maintenance and inspection.

[Problem to be solved by the invention] The problem to be solved by the invention is to
To provide a pipe mounting device that facilitates piping work by providing ports corresponding to each port of a directional control valve and a double-acting actuator.

[Means for Solving the Problems] In order to solve the above problems, the pipe installation device of the present invention connects each port of the directional control valve on the pressure source side and the double-acting actuator on the drive side to the pipe fittings attached to them. , in a pipe fitting device connected by a double pipe connected to these pipe joints, each of the above pipe joints:
an enlarged portion projecting outward in the radial direction; a second opening that opens at a location corresponding to one port of the directional control valve or double-acting actuator; and a second opening that has a larger diameter than the second opening and opens on the opposite side. a first passage hole that communicates the first opening and the second opening, and one end of which opens into the first passage hole and the other end of which is the other port of the directional control valve or double-acting actuator in the enlarged diameter portion; and a pipe connector fitted into the first opening, and the inner pipe of the double pipe has both ends passing through the pipe connector and the second opening. , is connected to one port of the directional control valve and the double-acting actuator in a sealed state, and the outer pipe of the double pipe is characterized in that both ends thereof are connected to the pipe connector.

[Operation] Both ends of the inner pipe of the double pipe are connected to one port of the directional control valve and the double-acting actuator through the pipe joint, and both ends of the outer pipe are connected to the pipe fitting of each pipe joint, and then these are connected. When the pipe joints are attached to the directional control valve and the double-acting actuator, the second opening of each pipe joint and the other end of the communication hole communicate with each port of the directional control valve and the double-acting actuator, respectively.

Therefore, piping can be done only by connecting double pipes, and there is no need for any other piping.
The complexity of pipe connections associated with the use of double pipes is eliminated.

Note that the double pipe may be connected to these pipe joints after each pipe joint is attached to the directional control valve and the double-acting actuator.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows the first embodiment of the present invention, in which a mounting portion 1 to which a pipe joint 2 is attached is connected to a directional control valve on the pressure source side. 31, and a double-acting cylinder 41 is shown on the driving side.

The pipe fitting 2 attached to each of the above-mentioned attachment parts is the second
As shown in detail in the figure, it is formed of a cylindrical portion 3 and an enlarged portion 4 whose one end side portion protrudes outward.

On the other hand, the pipe connected to the pipe joint 2 is the outer pipe 5a.
and an inner tube 5b inserted into an outer tube 5a, forming a first passage 6a between the inner and outer tubes,
A second passage 6b is formed within the inner tube. The double pipe 5 is made of a rigid material such as copper or steel, a synthetic resin such as nylon or urethane, or a flexible material such as synthetic rubber.
The inner tube 5b may be made of a flexible material.

The cylindrical portion of the pipe joint 2 is provided with holes whose diameters are sequentially enlarged from the end on the mounting side. are formed respectively. The enlarged portion 4 also includes a through hole 11 that penetrates the enlarged portion 4 in a direction parallel to the hole, and a first through hole 11 that extends through the enlarged portion 4 in a direction parallel to the hole.
A passage 12 communicating with the passage hole 8 is provided. Then, the end of the through hole 11 and the second opening 7
are opened corresponding to the first port 21 and the second port 22 of the mounting portion 1 on the pressure source side or the drive source side, respectively.

Furthermore, an annular outer tube sealing member 14 and a tube connector 15 are fitted into the first opening 10, and the tube connector 15 includes a mounting member 16, which is fitted into the tube connector 15 in order from the outside. Guide member 17, locking claw 18a
It consists of a leaf spring 18 and a release button 19.

On the other hand, the first port 21 provided in the above-mentioned mounting part 1 has a thread formed on its inner surface, and the second port 21 has a thread formed on its inner surface.
An inner tube locking portion 24 is formed in the port 22 to insert and lock the inner tube through the seal member 23.

The pipe fitting 2 is attached to the attachment part 1 by a plurality of attachment screws (not shown in FIG. 2), and one of the attachment screws is opened from the end surface on the screw side to the end surface. A screw with a hole 27 having an L-shaped hole 26 is used. The screw 27 with a hole is inserted into the through hole 11 of the enlarged portion 4 and screwed onto the screw on the inner surface of the first port 21, and communicates the first port 21 with the passage 12 through the L-shaped hole 26. This forms a communication hole that allows the first passage hole 8, which the first passage 6a opens, to communicate with the first port 21.

In order to connect the double pipe 5 between the pressure source side and drive side mounting parts using the pipe joints 2, 2 having the above configuration, first, the inner pipe 5b of the double pipe 5 is fitted into the pipe joint 2. When the pipe fitting 15 is inserted into the pipe fitting 2 through the release button 19 and its tip is brought into contact with the inner pipe locking part 24 of the second port 22 in the pressure source side or drive side mounting part 1. , its outer periphery is sealed by an annular sealing member 25, and then the pipe fitting 2 is attached to the attachment portion 1 with an attachment screw.

After such attachment, the outer tube 5a is attached to the inner tube 5b to form a double tube, the outer tube 5a is inserted into the pipe connector 15, and its outer periphery is sealed with the annular sealing member 14. The tip thereof is brought into contact with the outer tube locking part 9. When the outer tube 5a inserted into the pipe joint 2 in this way is moved slightly in the opposite direction to the insertion direction, the locking claw 18 of the leaf spring 18 whose outer periphery is cylindrical
By being locked by a, it is locked and connected to the pipe joint 2.

In addition, in the above state, release button 1
When 9 is pressed, the pressing part at the tip of the release button 19 presses the locking pawl 18a of the leaf spring 18 to expand the diameter of the outer tube 5a, thereby releasing the locking of the outer tube 5a with the pipe connector 15. Connect the pipe 5a to the pipe fitting 2
It can be extracted from.

At the other end of the double pipe 5 connected to one of the mounting parts 1 on the pressure source side or the drive side by one pipe joint 2 as described above, another pipe joint 2 is connected in the same manner as described above. After fitting and abutting the inner pipe 5b protruding from this pipe fitting 2 into the inner pipe locking part 24 of the other fitting part 1, the pipe fitting 2 is attached to the other fitting part 1 with a mounting screw. Attach to.

The directional control valve 31 shown in FIG. 1
It is sent from the port 21 or the second port 22. On the other hand, the double-acting cylinder 41 has passages 42a and 4 which communicate with the first port and the second port, respectively.
2b is provided in the cylinder 41.

Therefore, the pressure fluid sent out from the second port 22 of the directional switching valve 31 flows into the cylinder and moves the piston 43 to the left, and the fluid in the other piston chamber flows from the first port 21 of the double-acting cylinder 41 into the directional switching valve 31. It is discharged to the outside through the valve 31. Directional switching valve 31
When the spool 32 of the cylinder 41 is switched, the pressure fluid from the input port is transferred to the first port 21 of the cylinder 41.
The piston 43 moves to the right.

FIG. 3 shows a second embodiment of the pipe joint according to the present invention, and in this pipe joint 2A, in place of the through hole 11 and passage 12 provided in the enlarged part 4 of the first embodiment,
A communication hole 45 bent into an L-shape is provided.

Therefore, the pipe fitting 2A has the above-mentioned hole screw 27.
It is fixed to the mounting part 1 only by the mounting screw 46 without using the mounting screw 46. The other structure of the pipe joint 2A is similar to the pipe joint 2 of FIG. 2.

In addition, the fixing of the pipe connector and the outer pipe in the present invention is not limited to the pipe connector having the configuration described in the above embodiment, but by inserting the outer pipe into the pipe connector, the outer pipe can be fixed to the outer pipe. The pipe fitting may have a different configuration as long as it is locked to the pipe fitting.

[Effects of the invention] The present invention provides an opening that communicates with one port of the directional valve or double-acting actuator in the pipe joint, and an opening that communicates with one port of the directional valve or double-acting actuator in the enlarged portion that projects outward in the radial direction. By providing a communication hole that communicates with the port, piping can be done by simply connecting both ends of the double pipe to these pipe fittings, eliminating the complexity of piping work associated with the use of double pipe. .

Furthermore, since the piping is simplified, the efficiency of maintenance, inspection, etc. of fluid equipment can also be improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing an embodiment of the invention, Fig. 2 is a longitudinal sectional front view enlarging the main parts of Fig. 1, and Fig. 3 is a second embodiment of the pipe joint of the invention. FIG. 1... Mounting part, 2, 2A... Pipe joint, 4... Enlarged part, 5... Double pipe, 5a... Outer pipe, 5b... Inner pipe, 7... Second opening, 8... Third 1 passage hole, 10
...First opening, 15...Pipe connector, 21...First
Port, 22...Second port.

Claims (1)

[Claim for Utility Model Registration] Each port of the directional control valve on the pressure source side and the double-acting actuator on the drive side is connected by a pipe fitting attached to them and a double pipe connected to these pipe fittings. In the pipe fitting device, each of the pipe fittings has an enlarged portion projecting outward in the radial direction, a second opening opening at a location corresponding to one port of the directional control valve or double-acting actuator, and the second opening. a first opening having a diameter larger than the opening and opening on the opposite side; a first passage hole that communicates the first opening and the second opening; one end opening to the first passage hole and the other end opening the enlarged diameter portion. a communication hole opening at a position corresponding to the other port of the directional control valve or double-acting actuator, and a pipe connector fitted into the first opening; both ends passing through the connector and the second opening are connected to one port of the directional valve and the double-acting actuator in a sealed state;
A pipe attachment device for a fluid device, characterized in that the outer pipe of the double pipe is connected at both ends to the pipe connector.