JPH0854093A - Exhaust fixed throttle - Google Patents

Abstract

PURPOSE:To perform regulation of the speed of an actuator without mounting and demounting a piping. CONSTITUTION:An air passage running through a block body in the shape of a threaded plug is provided, in order, from the inflow port side of an air flow to the outflow port side with a first region (a), a second region (b), and a third region (c). The third region (c) has a bore D lower than that of the first region (a), and the second region (b) is formed in a conical shape having a bore being high on the first region side (a) and gradually decreased toward the third region (c) side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust fixed throttle used for speed control of an actuator such as a pneumatic cylinder in automation / labor-saving equipment.

[0002]

2. Description of the Related Art An actuator 1 in the pneumatic control system shown in FIG. 3 is composed of a retracting single-acting pneumatic cylinder, and a solenoid valve 4 is connected to a port 2 thereof via a pipe 3.

The pipe 3 is made of a resin tube or the like, and one end thereof is connected to the port 2 of the actuator 1 via a joint 5 as shown in FIG. The other end of the pipe 3 is connected to the port 6 of the solenoid valve 4 via the joint 7.

Both joints 5, 7 consist of instant joints or quick joints. Therefore, the pipe 3 can be attached to and removed from both ports 2 and 6 with one touch. The fixed throttle 8 shown in FIG. 5 is internally provided on the joint 7 side of the pipe 3.

The fixed throttle 8 imparts resistance to the air flowing between the solenoid valve 4 and the actuator 1, whereby the speed of the actuator 1 is controlled to a predetermined value.
Reference numerals 9 and 10 denote claws for opening the tube.

[0006]

However, in the pneumatic control system having such a fixed throttle in the pipe,
When adjusting the speed of the actuator 1, the fixed diaphragm 8
Must be replaced one by one, and the work of removing and installing the pipe 3 is required each time. Therefore, as described above, the one-touch type joints 5 and 7 are used, but it is not easy to attach and detach a large number of pipes in a narrow space, and there is a risk that the pipes may be erroneously connected. . Further, there is also a disadvantage that the type of joint that can be used is limited to a specific type.

Therefore, an object of the present invention is to provide an exhaust fixed throttle in which the speed of the actuator can be easily adjusted without removing the pipe.

[0008]

According to the present invention, in order to achieve the above-mentioned object, an air passage which is composed of a block body having an outer shape of a screw plug and which runs axially through the block body is provided. From the inlet side of the exhaust air to the outlet side, sequentially have a first region, a second region and a third region,
The third region has a smaller diameter than the first region,
There is provided an exhaust fixed throttle characterized in that the second region is formed in a cone shape having a large diameter on the first region side and a gradually decreasing diameter toward the third region side.

[0009]

The exhaust fixed throttle according to the present invention is composed of a block body having an external shape of a screw plug, so that it can be attached to the exhaust port of the solenoid valve manifold.
Speed control for the actuator is possible. In particular, since the mounting can be achieved by screwing regardless of the piping, the work of replacing the fixed throttle at the time of speed adjustment can be easily performed without removing the piping.

Further, the air passage set in the block body has a first region, a second region and a third region sequentially from the inlet side of the exhaust air to the outlet side thereof, and the third region is the first region. The actuator has a smaller diameter than that of the area, and the second area is formed in a cone shape having a larger diameter on the first area side and a gradually smaller diameter toward the third area side. The amount of exhaust air to be determined can be regulated with high accuracy. Moreover, the muffling function can be provided by the second region and the third region.

[0011]

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

The solenoid valve 11 shown in FIG. 1 is a manifold 1
2, the exhaust air supply port 13 of the manifold 12
The tube 15 communicated with the nipple 14 via a nipple 14 is an actuator (not shown) such as a double-acting pneumatic cylinder.
Leading to the exhaust port.

The exhaust port 1 of the manifold 12
An exhaust fixed throttle 17 is attached to 6 by screwing.

As shown in FIG. 2, the exhaust fixed throttle 17 is made of a hard synthetic resin or metal block body having an outer shape of a screw plug, and has an air passage 18 which runs through the block body in the axial direction. ing. The air passage 18 has a first region a, a second region b, and a third region c in order from the exhaust air inlet side to the outlet side. The third region c has a diameter D that is smaller than the diameter of the first region a. Further, the second region b is formed in a cone shape having a large diameter on the first region a side and a gradually smaller diameter toward the third region c side.

The air discharged from the exhaust port of the actuator through the tube 15 reaches the first region a of the exhaust fixed throttle 17 through the air passage of the nipple 14 and the manifold 12 of the solenoid valve 11. The flow rate is limited in the process of passing through the second region b and the third region c and being discharged to the external space. As a result, speed control of the actuator is achieved, and at the same time, a silencing effect is obtained.

The speed of the actuator is determined by the flow rate of exhaust air, and the flow rate of exhaust air is mainly determined by the axial length c of the third region c and the diameter D. In addition, the muffling effect is the second
It is determined by the axial lengths and diameters of the region b and the third region c. Therefore, various kinds of exhaust fixed throttles 17 having different axial lengths and diameters of the second region b and the third region c are prepared, and the actuators can be operated by a simple operation of exchanging them as necessary. The speed can be adjusted to the desired value.

[0017]

As described above, according to the present invention, an exhaust fixed throttle which can be detachably mounted on the manifold of the solenoid valve can be obtained, whereby the speed of the actuator can be set to a predetermined value. Further, the exhaust fixed throttle itself can have a muffling function. Since this exhaust fixed throttle is formed in the shape of a screw plug,
It is not necessary to detach the pipe at the time of the replacement, and the exhaust fixed throttle of another type can be replaced with a simple operation, whereby the speed of the actuator can be adjusted to an arbitrary value.

[Brief description of drawings]

FIG. 1 is a side sectional view of an exhaust fixed throttle according to an embodiment of the present invention and a solenoid valve having the exhaust fixed throttle attached to a manifold.

FIG. 2 is a perspective view of an exhaust fixed throttle according to an embodiment of the present invention.

FIG. 3 is a perspective view of a part of a conventional pneumatic control device.

FIG. 4 is a cross-sectional view of a pipe and a joint equipped with a conventional fixed throttle.

FIG. 5 is a perspective view of a conventional fixed diaphragm.

[Explanation of symbols]

 11 Solenoid valve 12 Manifold 17 Exhaust fixed throttle 18 Air passage a 1st area b 2nd area c 3rd area

Claims (1)

[Claims] 1. An air passage which is composed of a block body having an external shape of a screw plug, and which runs through the block body in an axial direction, has a first region sequentially from an inlet side of exhaust air to an outlet side thereof. It has a second region and a third region, the third region has a diameter smaller than the diameter of the first region, the second region is large on the first region side, and gradually increases toward the third region side. An exhaust fixed throttle, which is formed in a cone shape having a small diameter.