JPH0338545Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in a pneumatic transport pipe used to transport powder or granular material using air or other gas as a medium.

[Conventional technology]

Pneumatic transport pipes are used to pump and suck powders, tablets, etc. using gas, but this type of pneumatic transport pipe uses corrosion-resistant alloys such as stainless steel to prevent corrosion. When adding pipes, the butt joints are welded. However, it is extremely difficult to connect pipes in this way, and once the connection is completed, it becomes impossible to remove the connections and reconnect them. It has become common for various difficulties to arise.

[Purpose of invention]

The present invention was proposed to achieve the above-mentioned objectives, and it is possible to achieve sufficient airtightness when connecting pneumatic transport pipes, increase the strength at the time of connection, and
The present invention provides a pneumatic transport conduit that can be easily assembled and constructed.

[Means for solving problems]

The present invention is a structure of a pneumatic transport pipe in which the connecting parts of the pneumatic transport pipe are connected and connected by a split joint. Pipe holding surfaces having a sufficient length to hold the outer peripheral surface of each pipe of the pneumatic transport pipes that are butt-connected are provided on both sides of the sealing material insertion groove into which the material is inserted. It is composed of a pair of vertically split joint pieces, and a flange portion with bolt holes drilled therein is formed on both outer sides of the holding surface including the outside of the fitting groove formed in each of the above joint pieces. The upper and lower joint pieces have a structure in which a mounting pedestal with a screw hole is protruded from the center of the outer surface, and a support rod with a threaded tip is screwed into this mounting pedestal. It is characterized by

Note that the pneumatic transport pipe in the present invention is not limited to one that uses air as a transport medium, but may also use gases such as nitrogen and carbon dioxide as a transport medium, and in this specification, these We will call it the pneumatic transport conduit, including its concept.

Embodiment Next, the transportation pipeline of the present invention will be explained based on an embodiment shown in the drawings. In the figure, A is a pneumatic transport pipe that connects the hopper H, mixer M, feeder C, and other equipment to pneumatically transport raw materials in the form of powder, granules, pellets, and tablets. This example is just one example, and the shape of this pipe can be arbitrarily set according to the transport route of the raw materials, and straight and curved pipes are straight pipes, bent pipes of fixed length, or pipes cut to set dimensions. By sequentially adding multiple pipes and branching them where necessary, it is like a single continuous pipe, and air and other gases are transported from one equipment to the other equipment via this transport pipe. The above-mentioned materials are transported using fluid pressure or negative pressure. The transport pipeline A, which is constructed by adding pipes in this way, is made of a material that has strength and corrosion resistance that can withstand the chemical characteristics of the raw materials to be transported, the chemical characteristics of the fluid flowing down, and the pumping pressure, and the per unit time. Pipes and fittings with diameters appropriate to the amount of transportation are used.

In the transport pipeline A, which is arranged to be suitable for transporting powder, etc., between the various devices arranged at appropriate positions, the connections between the pipes are as shown in detail in Figure 2 and below. Joint B is used.

This split joint B is connected by an upper joint piece 1A and a lower joint piece 1B which are divided into upper and lower halves so as to hold the outer peripheries of the ends of two pipes P1 and P2 which are butted against each other from both the upper and lower directions. configured.
The two joint pieces 1A and 1B differ only in the shape of the fastening bolt head and the fitting groove of the nut; the other shapes are symmetrical, so next we will explain the structure of the upper joint piece 1A. Explain in detail.

The upper joint piece 1A is made of a metal suitable for a joint (selected from aluminum alloy, stainless steel, etc. depending on the application), synthetic resin, or other material, and has a U-shaped overall shape in cross section.
On the inner surfaces of both ends in the longitudinal direction, there are pipe holding surfaces 1 having a sufficient length to hold the outer peripheral surfaces including the respective pipe ends of the butt-jointed transport pipes.
1 and 12 are formed into semicircular shapes, the inner diameter of which is the pipe P.
1. The outer diameter should be equal to or slightly larger than the outer diameter of P2. Also, pipe holding surfaces 1 provided oppositely at both ends
A semicircular sealing material insertion groove 13 is provided at the center of the inner surface of the upper joint piece between the grooves 1 and 12.
The width of 3 is the length of the short tubular sealing material 4, which will be described later.
Further, the depth of the groove 13 is made to be approximately equal to or slightly smaller than the thickness of the sealing material 4. This is to improve the sealing performance and joint performance when joining pipes.

Further, flange portions 14 and 15 are integrally formed at both ends along the longitudinal direction of the upper joint piece 1A.
Both sides of this flange part, that is, the pipe holding surface 1
Bolt holes 16, 16 and 17, 17 are bored at both outer positions of bolt holes 1, 12, and the bearing surface of the head 21 of the socket bolt 2 is formed on the outer surface of the upper joint piece at the bolt holes 16, 17. Bolt fitting grooves 18, 18 are formed so as to abut or slightly fit the head bearing surface, and through this fitting groove 18, part or all of the bolt head 21 is fitted into the joint piece, Reduces the amount of protrusion to the outside of the split joint.

The lower joint piece 1B is similar to the upper joint piece 1A, and has pipe holding surfaces 11 and 12 on the inner surface of both ends, a sealing material insertion groove 13 in the middle, and bolt holes 16 and 16 in the flange parts 14 and 15. ,17,17
is perforated, and its shape is similar to that of the upper joint piece 1.
It is symmetrical to A. The difference from the upper joint piece is that a nut fitting groove 19 is formed on the outer surface of the lower joint piece 1B instead of a bolt head fitting groove 18. The fitting groove 19 has a polygonal shape that fits a part of the outer shape of the nut 3 to prevent rotation when the nut 3 is fitted.

Furthermore, since a mounting base 1C with a screw hole 1C' is provided protruding from the center of the outer surface of the lower joint pieces 1A and 1B, the screw hole 1 of this mounting base 1C is
As shown in FIG. 6A, a support rod 22 having a threaded thread 22a at the tip is screwed into C', and the other end 22c of the support rod 22 is attached to the ceiling or floor using a screw 22b. If it is fixed in place, the transport pipeline can be easily assembled and constructed without using restraints such as clamp bands.

Reference numeral 4 denotes a sealing material that is inserted into the seal fitting groove 13 of the split joint, and is made into a short tubular shape whose length and outer shape are determined according to the length and inner diameter of this groove 13, and is made of urethane rubber or silicone rubber. , or other materials having desired elasticity, airtightness, chemical resistance, heat resistance, and strength depending on the purpose of use as a sealing material.

Therefore, when a transport pipeline is arranged between each piece of equipment, straight pipes and curved pipes cut in advance to required dimensions are appropriately combined and connected in sequence. The above-mentioned split joint is used for the connection of this pipe,
One of the pipes P1, which has been cut to a fixed size or according to the pipe line, is first fitted into the short tubular sealing material 4. At this time, the end of the pipe P1 is made to reach approximately the center of the sealing material 4. Next, the end of the other pipe P2 is inserted into this sealing material from the opposite side, so that the tip surfaces of both pipes P1 and P2 abut each other within the sealing material 4. In this case, the seal material 4 is fitted and fixed in the seal fitting groove 13 of the lower joint piece 1B as shown in FIG. 4, but this is done by first fitting the ends of both pipes P1 and P2 into the seal material 4 as described above. , Next, this sealing material 4 is attached to the lower joint piece 1B.
It may be fitted into the seal fitting groove 13 of. In this way, seal material 4 and pipe P are placed in place.
1. After the P2 end is fitted, when the upper joint piece 1A is placed on the lower joint piece 1B, both the upper and lower joint pieces 1
A, 1B circular pipe holding surfaces 11, 11
The outer circumferential surfaces of the end portions of the pipes P1 and P2 are held by the pipes P1 and P2, and the outer circumferential surfaces of the seal material 4 are held by the circular seal fitting grooves 13 and 13, respectively. Next, between the bolt holes 16, 16 and 17, 17 that match each other in the vertical direction of both joint pieces 1A, 1B.
Insert the socket bolt 2 from above between them, screw it into the nut 3 fitted into the nut fitting groove 19, and use this bolt and nut to connect the upper and lower joint pieces 1A, 1B.
Pipes P1 and P2 are tightened and butted together
are connected and combined in an airtight manner with a sealing material 4.

Furthermore, although bolts and nuts were used to fasten both the upper and lower joint pieces, it is also possible to use U-bolts and nuts, and FIGS. 7 to 13 show examples in this case. The U-bolt is shown as 2', and parts corresponding to those in the first embodiment are given the same reference numerals and explanations will be omitted. Using such U-bolts simplifies the tightening operation and provides good workability.

[Effect of idea]

As understood from the above description, the present invention provides the following unique effects due to its structural features.

1. On both sides of the seal fitting groove of the pair of upper and lower joint pieces, flanges are provided with bolt holes that are butt-jointed and hold the entire outer circumferential surface of the transport pipe. When a bolt is inserted into the bolt hole of the flange part and tightened with a nut, not only the joint part where the sealing material is fitted, but also the wide part including the outer peripheral surface near the joint part is held, so the two pipes are It is firmly fixed in a horizontal position, making it particularly strong when joining.

2. A mounting pedestal with a screw hole is provided in the center of each outer surface of the pair of upper and lower joint pieces, so a thread that will serve as a mounting device is formed at one end of this part, and the other end is attached to the ceiling surface or If you screw in the support rod that can be attached to the wall and use it, the 6th
As shown in Figure A, the transportation pipeline can be easily assembled and constructed without using clamp bands or special restraints, and the appearance during construction is also sleek.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of a pneumatic transport pipe, Figs. 2 to 6 are diagrams of a first embodiment of a split joint, Fig. 2 is an external view of the split joint, and Fig. 3 4 is a plan view with the upper joint piece removed, FIG. 5 is a bottom view, FIG. 6 is a front view in use, and FIG. 6A is an assembly of the transport pipe according to the present invention. It is a construction example diagram. Moreover, FIGS. 7 to 13 are views of a second embodiment of the split joint, in which FIG. 7 is a plan view of the above-mentioned joint piece, FIG. 8 is a plan view of the lower joint part, and FIG. The side view of the figure, Figure 10 is A- of Figure 8.
A' line sectional view, Figure 11 is a vertical sectional view of Figure 8, Figure 12 is a half-cut vertical sectional view in use, and Figure 13 is a vertical sectional view of Figure 8.
The figure is a half-cut longitudinal sectional view in that case. A...Transport pipe line, B...split joint, 1A...upper joint piece, 1B...lower joint piece, 2...bolt, 3
... Nut, 4 ... Seal material, P1, P2 ... Pipe, 11, 12 ... Pipe holding surface, 13 ... Seal material insertion groove, 14, 15 ... Flange part, 1
6,17...Bolt hole, 1C...Mounting pedestal, 1C
...screw hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A structure of a pneumatic transport pipe in which the connecting parts of pneumatic transport pipes are connected and connected by a split joint, wherein the split joint is a seal that is fitted onto the butt joint of the pneumatic transport pipe. Pipe holding surfaces having a sufficient length to hold the outer peripheral surface of each pipe of the pneumatic transport pipes that are butt-connected are provided on both sides of the sealing material insertion groove into which the material is inserted. It consists of a pair of vertically split joint pieces, and a flange portion with bolt holes drilled therein is formed on both outer sides of the holding surface including the outside of the sealing material insertion groove formed on each of the joint pieces. , a mounting pedestal with a screw hole formed protrudes from the center of the outer surface of the upper and lower joint pieces,
This pneumatic transport conduit has a structure in which a support rod with a threaded tip is screwed into this mounting base.