JPS5848459B2 - Tube insertion guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guide device for inserting a thinner tube or filament into a tube, and it is an object of the present invention to provide a product that can be easily inserted.

In the present invention, a plurality of bullet plates each having an arched natural shape are attached to the outer periphery of the distal end of the insert, with the convex portion facing outward, with one end fixed to the insert and the other end slidable. That's what happens.

The device of the present invention is not limited to a narrow industrial field of use, but can be used in various fields.One example of its use is to attach a sheathed thermocouple with a small diameter (for example, 6 mm outside diameter) to a tank for low-temperature liquefied gas. We will explain in detail how to install it.

This type of tank consists of two or three tanks, an inner tank and an outer tank, and in order to measure the temperature of the liquefied gas (it is most preferable to fix the temperature sensing part (tip) of a thermocouple on the outer wall of the inner tank). Currently, the current method is to weld and fix the protective tube B to the required location on the outer wall of the inner tank A when constructing the inner and outer tanks as shown in Figure 1, and use the hole C provided inside the protective tube B as the reference point. A sheath type thermocouple is inserted from the outer end of the flexible tube D, and the other end is guided to the outside of the outer tank. Later, when the construction of the tank has progressed appropriately, a sheath type thermocouple is inserted from the outer end of the flexible tube D, and its tip is inserted into a protective tube. It reached hole C in B and was fixed.

In this case, if the inner wall of the flexible tube D is uneven, the curve is steep, or there is any other obstacle, the tip of the thermocouple may come into contact with it and stop, making it impossible to insert it any further. Ta.

In the above case, if the present invention is implemented, four bullet plates 1 each having an arched natural shape are attached to the tip of the sheathed thermocouple 4, as shown in Figures 2 to 4, with the arched convex portions facing outward. That is, each bullet plate 1 is welded and fixed to the sheath of the thermocouple 4 at one end near the tip 2L, and the other end is welded and fixed to the ring 3 fitted so as to be able to slide on the sheath.

Because of the above configuration, as shown in the second diagram, the outside of each bullet plate 1 is pressed against the inner wall of the tube D, and the tip of the thermocouple 4 is held in the center of the tube D, and the inner wall is obstructed. Even if there is an object, the tip of the thermocouple 4 can avoid the obstacle as shown in FIG. When the ring 3 moves backwards and does not prevent the insertion of the thermocouple 4, once it passes the obstacle, the bullet plate 1 returns to its original state due to its elasticity and returns to the third position.
Returning to the illustration in Figure A, the tip of the thermocouple 4 is held at the center of the tube D and insertion continues.

In this way, the tip of the thermocouple 4 reaches the protective tube B and fits into the hole C, so if it is fixed in that state, the purpose is achieved, and the temperature of the liquefied gas stored in the inner tank A will be the same as that of the protective tube B. It is transmitted to the thermocouple 4 via the sheath type thermocouple inserted into the flexible tube D, and can be measured from outside the outer tank.

The above is an example of implementing the present invention in a sheath type thermocouple, or in other thermometers, or other sensors, or deep inside a straight or curved tube in various industrial sectors. When inserting an object, it is extremely easy to do so using the device of the present invention.

[Brief explanation of the drawing]

Country 1 is a cross-sectional view of the thermocouple guide provided on the outside of the tank and other parts, Figures 2 and 3 are schematic cross-sectional views explaining the operation of the device implementing the present invention, and Figure 4 is a cross-sectional view of the device implementing the present invention. Side view with one side cut away. Explanation of the drawings, 1. Bullet plate, 2. Curved welding, 3.
Concave ring, 4...Thermocouple, A...tank, B...protection tube, C...hole, D...
····Flexible Tube.

Claims (1)

[Claims] 1 For tube insertion, a plurality of bullet plates each having an arched natural shape are attached to the outer periphery of the tip of the insert, one end of which is fixed so that the convex portion is on the outside, and the other end of which is slidably attached. Guidance device.