JPS6361249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application This invention relates to a device for towing objects to be transported in fluid pipe transportation.

(2) Conventional technology There are basically two conventional methods for pipe transportation using fluid. One method is to use packing or a collar attached to the capsule to prevent fluid from leaking between the capsule and the inner wall of the tube, and push the capsule using the pressure of the fluid. Another method is to make the specific gravity of the sealed capsule approximately equal to that of the fluid and allow it to flow together with the fluid.

In the former case, not only is there a contradictory relationship between the packing effect and friction loss between the capsule and the inner wall of the pipe, but also because the front and rear brim or packing are in close contact with the inner wall of the pipe, the pipe has a large radius of curvature depending on the length of the capsule. Is required. That is, it has the disadvantage that it cannot be bent with a small radius. Also, it is impossible to send capsules continuously.
If there is a considerable distance between the starter capsule and the successor capsule, and the fluid pressure between the two capsules is compressed by the latter capsule, and cannot be compressed to an extent sufficient to move the starter capsule, the starter capsule will not move. In other words, the speed of the first capsule gradually slows down, the distance between the two gradually narrows, and as the distance increases, it becomes a cause of failure. This is the same as when you use a paper gun (also called a stab gun) and if you don't push the bullet down enough first, the bullet won't come out. For example, a certain company's catalog states that the speed is 6 m/s and the interval is 30 seconds. Therefore, the transport efficiency for fluid is 1/180. This not only causes poor transportation efficiency, but also causes breakdowns and the difficulty of repair and long-distance transportation. Furthermore, since the principle is the same as that of a gun, it is impossible to apply it at low speeds, and there are problems such as collisions within the tube, speed control at the discharge point, and buffering.

Since the latter is used to flow together with the fluid, the diameter of the capsule or brim can be made with sufficient margin relative to the inner diameter of the pipe, so when the fluid is water and is transported within the pipe,
Constraints such as radius of curvature of conduit, shipping interval, transportation distance, etc.
Failures are rare, low-speed transportation is possible, and the speed range is wide. However, even in this case, the method of transporting the capsule outside the tube by magnetic coupling between the magnet attached to the capsule inside the tube and the magnet attached to the cart outside the tube does not provide sufficient thrust with just the collar attached to the capsule. The same applies to intra-pipe transportation when the fluid is air. Also, the smaller the pipe, the easier and more economical it is to construct and handle, but with conventional technology it is impossible to expect a large thrust from a small pipe.

(3) Problems to be solved by the invention The invention aims to obtain sufficient thrust while taking advantage of the characteristics of the method of making the specific gravity of a sealed capsule approximately equal to that of the fluid and flowing it together with the fluid.

(4) Means to solve the problem In pipe transportation using fluid, in order to compensate for the force of the fluid flowing, a flexible wire is used to connect commensator vanes in the direction perpendicular to the fluid, and the wire is One end is connected to the object to be transported so as to index the object.

(5) Effect The invention uses blades to capture the force of fluid flow without damming up the fluid, and receives the flow pressure of the fluid at the edge of the catching blade, and also uses the negative pressure generated on the back side of the catching blade. It is promoted. That is, the streamlines of the fluid collide at the edges of the catching blades, and the fluid flows so as to entrain a part of the blades. Therefore, even if the diameter of the catching blade is sufficiently smaller than the inner diameter of the pipe, the catching effect can be achieved, and as the number of blades is increased, the pulling force can be increased. In addition, the fluid is not dammed up, and each towing device consisting of the front and rear catcher blade groups in the pipe receives the same flow rate and the same flow velocity, so they move at approximately uniform speed, and the catcher blades are flexible Since they are connected by wires, they can be bent freely according to the curvature of the pipe.

(6) Example In the figure, 1 is a pipe, 2 is a fluid, 2' is a streamline, and 3
is a capsule, 4 is a catching wing, 5 is a main line, 5' is an auxiliary line, 6 is a tube foot fixed to the catching wing to make it easy to attach the catching wing to the main line, 7 is the catching wing of 4, 5, 5' main line,
This is the key to connect the towing device, which consists of a trap line, to the capsule.

The areas of the capsule 3 and the catching blades 4 in the transverse direction to the fluid are made large enough to provide a sufficient clearance with respect to the cross-sectional area of the tube. In the case of long-distance continuous transportation, it is 70% of the pipe inner diameter (this figure is based on water as the fluid and normal PVC water pipes, so it will of course be slightly higher or lower depending on the properties of the pipe. In the case of air) I think that it may be a little larger due to the viscosity, but the best ratio needs to be determined experimentally depending on each individual case as with other technologies.) It is desirable that it be 50% or more. This is because when it exceeds 70%, the head loss of water increases rapidly, and when it falls below 50%, not only is there a risk of duplication within the pipe, but the trapping effect cannot be expected to be very effective. However, if there is sufficient water head, the distance is short, and the amount of transportation is small, it is of course possible to use 70% or more. However, even in this case, it is better not to exceed 85% to 90%.

It is best to use thin metal or plastic catching blades, but if thick ones are used, the periphery can be made thinner.

It is a good idea to make the planar shape of the catching blade 4 similar to the cross-sectional shape of the pipe 1 in terms of the streamline 2', stability of the pumping device, and ease of construction. To make it longer, you can make it into a complicated shape, make a hole, or make it square instead of round.

However, in this case, care must be taken when attaching to the main line 5 and auxiliary line 5' so as not to disturb the streamline 2'.

The catching blade 4 may have a flat surface. If the edges are bent into a dish shape in the upstream direction, the efficiency of trapping will be improved, but the horizontal and vertical vibrations will be severe. On the other hand, if you bend it in the downstream direction, there will be less vibration, but the catching effect will be slightly lower, and there is a risk that it will get stuck if there are protrusions inside the pipe. By attaching a wheel or a sled to the catching vane 4 so that it slides along the inner wall of the pipe, it is possible to swing out and reduce the amount of jamming. If the trapping blades 4 are placed too closely together, the trapping effect per blade will decrease.

The catching blade 4 must be fixed to the main line 5 and the auxiliary line 5' so as to always face the fluid directly. To fix it, make a knot in the wire and press it from both sides using auxiliary fittings such as eyelets. Various options are possible, such as attaching tube feet 6 to the brim in advance. The main line 5 and the auxiliary line 5' are used to hold the catching blades at regular intervals and at right angles to the flow line, as described above, and tow the transported object.The number of lines is arbitrary, and the main line at the center In many cases, one is sufficient. Each wire can be anything, such as wire, wire, string, etc., but it must have the required strength and be able to bend according to the curve of the conduit. One end of each wire is attached to the key 7, and the key is attached to the capsule 3 so that it does not come off.

(7) Effects of the invention As is clear from the above explanation, since the invention is for transporting fluids according to their flow, continuous transportation is possible. Therefore, the packing or collar attached to the capsule prevents the fluid from leaking between the capsule and the inner wall of the tube, and the transport efficiency is much better than the method of pushing the capsule using the pressure of the fluid. In addition, for a method in which the specific gravity of a sealed capsule is made approximately equal to that of the fluid and the fluid flows together with the fluid, there is no need to be too particular about the specific gravity of the capsule. In addition, there are no failures, and when you stop and restart, the first one starts working, so recovery is quick. There is little disturbance to the radius of curvature of the pipe. A large indexing force can be expected with a small tube. Low speed operation is possible and the range of application is wide. Since the catching blades and the transported object in the pipe receive the same flow rate, they move at a substantially constant velocity, and there is no fear of destruction due to collision. By installing a bypass and allowing some or all of the fluid to flow through the bypass, the speed can be partially changed or stopped.

In addition, pipe transportation is characterized by low equipment costs, operating costs, and maintenance costs, does not emit noise, gas, or other pollution, and reduces traffic accidents, making it extremely useful to society.

[Brief explanation of drawings]

FIG. 1 shows an example of implementing the present invention, 1...
...pipe, 2 ... fluid, 2' ... streamline, 3 ... capsule, 4 ... catching wing, 5 ... main line, 5' ... auxiliary line, 6 ... tube foot, 7 ... key, →...Indicates the transport direction and fluid flow direction.

Claims (1)

[Claims] 1. In pipe transportation using fluid, in order to capture the force of the flowing fluid, a flexible wire is used to connect catching vanes in a direction perpendicular to the fluid, and one end of the wire is connected to the transported object. A towing device for objects to be transported in pipe transportation, characterized in that the objects to be transported are indexed.