JP3909430B2 - Pipe connection structure and resin pipe with packing used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of pipe connection structures, resin pipes with packing pieces used therefor, and ferrules, and particularly relates to a pipe connection structure suitable for connecting pipes having a high frequency of disassembly.
[0002]
[Prior art]
When transporting materials such as pharmaceuticals, where the contamination of foreign substances is strictly controlled, not only to ensure the sealing inside the pipe, but also to ensure the workability when cleaning the pipe, It is necessary to facilitate the decomposition. Especially, in the granular material processing equipment for processing the granular material such as pharmaceuticals, the pipe is disassembled every time the processing material is changed, and the pipe is cleaned. In addition, since the piping is decomposed even when the granular material processing unit and the granular material storage unit are separated from each other, the ease of disassembling and assembling the piping is strongly desired.
In general, stainless pipes that are resistant to corrosion and rust are used for the piping, and ferrule joints that are excellent in ease of disassembly and sealing are widely used for connecting pipes. As shown in FIG. 7, in the conventional ferrule joint 100, annular ferrules 103 and 104 are welded or bonded to the outer circumferences of the ends of the first pipe 101 and the second pipe 102 to be connected, respectively, 104 is joined in a state of sandwiching a packing piece 105 such as an O-ring, and this state is held by a detachable clamp member 106.
[0003]
However, the conventional ferrule joint 100 has the following problems.
(1) Since two welding steps or bonding steps are required for one ferrule joint 100, the cost of piping is increased. In addition, when a ferrule is welded, welding distortion is particularly likely to occur in the ferrule. Skill is required for work, and stress corrosion and rust may occur from the welded part.
(2) Since the packing piece 105 is easy to drop off during disassembling / assembling of piping, not only the workability at the time of disassembling / assembling is lowered but also the packing piece 105 may be forgotten.
(3) Since at least two seams T are formed on the inner periphery of the pipe, not only the transfer resistance increases, but also a large amount of transferred material may stay in the pipe.
(4) Since it is a connection between rigid bodies, alignment at the time of assembly is difficult, and in the case of piping connecting between devices, there is a possibility that a large load acts on each device due to a positional shift between the devices. .
[0004]
[Problems to be solved by the invention]
The present invention was devised to eliminate the above-mentioned problems, and the object of the present invention is to make one ferrule of the ferrule joint unnecessary for welding (or no adhesion), thereby reducing piping costs. In particular, when connecting pipes that require repeated disassembling and assembling work , positioning can be performed reliably and easily by directly butting the joint surfaces of each separated pipe and connecting pipe. There is no inconvenience that the workability is lowered due to the falling off of the pieces and the difficulty of alignment, and the seam of the inner periphery of the pipe can be reduced, and the stay of the transported material in the pipe can be prevented. In addition to providing a packing function that can improve the sealing performance of the pipe connection part, it is possible to prevent misalignment between the two pipes. And to provide a pipe connecting structure and the packing Katazuki plastic pipe used therefor combines connection alignment function as connecting level adjustment that can.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the pipe connection structure of the present invention disassembles and assembles piping by connecting and releasing each of the pipes that are set apart in advance through a connecting pipe between their ends. In this connection structure, an annular fixed ferrule is fixed on the outer peripheral surface of the end of each pipe, and hook-shaped packing pieces are integrally formed on both ends of the connecting pipe made of resin. Further, two annular movable ferrules are attached to the outer peripheral portion of the connecting pipe, and an annular fitting groove is formed on the joint surface between each of the fixed ferrules and the movable ferrules, while the surface of each of the packing pieces and on the back side, made to form a convex portion which fits into the annular fitting groove, the packing piece is integrally molded to the fixing ferrule is fixed to each pipe the end portions The binding pipes, the closing mating fitting surface side protruding portion of the packing piece, and the alignment set by interviewing the joining faces of the pipe and the connecting pipe to the annular fitting groove of the fixed ferrule the separation, the movable By fitting the annular ferrule of the movable ferrule to the convex portion on the back surface of the ferrule while sandwiching the packing piece, the ferrule is joined to the fixed ferrule, and the joined state is held by a detachable clamp member. said fixed ferrule to connect one end of the connecting pipe which is integrally molded packing piece to the end portions on one of the pipe which is fixed, the other end of the other pipe in which the fixing ferrule is fixed the connecting pipe It is configured to be connected to the side .
Moreover, in order to solve the said subject, the resin pipe with a packing piece of this invention is used as the said connection pipe.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a granular material processing apparatus illustrating an embodiment of the present invention as a preferred embodiment will be described in detail with reference to the drawings. FIG. 1 is an overall side view of the granular material processing apparatus. As shown in this figure, the granular material processing apparatus 1 accommodates a processing apparatus main body 2 for pulverizing an object to be crushed (raw material) such as a pharmaceutical material, and a pulverized processed product pulverized in the processing apparatus main body 2. Container 3. Casters 2a and 3a are provided at the lower ends of the processing apparatus main body 2 and the container 3, respectively, and independent movement is allowed.
[0007]
The processing apparatus main body 2 includes a frame 5 having an L shape in side view on a gantry 4 that is movable by the casters 2a. A processing chamber 6 is provided at the front of the frame 5, and a motor 7 is mounted behind the processing chamber 6. The output shaft of the motor 7 is connected to the input shaft of the processing chamber 6 through the coupling 8, and is connected to the input shaft in accordance with the driving of the motor 7, and a rotating body (illustrated) provided in the processing chamber 6. (Omitted) rotates. At the center of the front cover located in front of the processing chamber 6, a raw material input pipe 9 is projected. A raw material charging hopper 10 is further provided at the upper end portion of the raw material charging pipe 9, and the material to be crushed from the raw material charging hopper 10 is supplied into the processing chamber 6 through the raw material charging pipe 9. Here, pulverization is performed by the striking action of the rotating body. Further, a discharge pipe 11 (first pipe) projects downward from the lower portion of the processing chamber 6. The discharge pipe 11, a connecting pipe 12 (second pipe), which will be described later, and the storage pipe 13 on the container 3 side constitute a pulverized processed product discharge path 14, and the pulverized processed product in the processing chamber 6 is discharged into the pulverized processed product. It is accommodated in the container 3 through the path 14.
[0008]
The container 3 is provided with the caster 3a at the lower part thereof, while an accommodation pipe 13 is projected from the upper part thereof. The storage pipe 13 is connected to the discharge pipe 11 of the processing chamber 6 via the connecting pipe 12 as described above, and stores the pulverized processed material that has been pulverized in the processing chamber 6. When the stored pulverized product is transported to another place, the pulverized product discharge path 14 is disassembled and the container 3 is moved. Accordingly, the pulverized processed product discharge path 14 is required to be easily disassembled. Hereinafter, the pulverized processed product discharge path 14 which is a main part of the present invention will be described in detail with reference to FIGS. explain.
[0009]
2 is a cross-sectional view of the piping constituting the pulverized material discharge path, FIG. 3 is a cross-sectional view of the connecting pipe, FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. is there. The discharge pipe 11 is a stainless steel pipe, and its upper end is integrally connected to the lower part of the processing chamber 6. On the other hand, an annular fixed ferrule 15 formed of a hard material such as stainless steel or Teflon is integrally fixed to the outer periphery of the lower end portion of the discharge pipe 11 by welding or adhesion. As shown in FIG. 3, the fixed ferrule 15 has a horizontal joining surface 15a on the lower side and a tapered surface 15b on the upper side, and further has an annular groove having a semicircular cross section in the joining surface 15a. 15c is formed. The accommodation pipe 13 is also a stainless steel pipe, and the lower end thereof is integrally connected to the upper portion of the container 3, and the fixed ferrule 15 is fixed to the outer periphery of the upper end similarly to the discharge pipe 11. The
[0010]
The connecting pipe 12 is formed of a soft resin such as silicon rubber or ethylene / propylene / diene copolymer (EPDM), and the length thereof is set in advance according to the distance between the discharge pipe 11 and the accommodation pipe 13. A hook-shaped packing piece 12a is integrally formed at both ends of the connecting pipe 12, and an annular convex portion 12b having a semicircular cross section is integrally formed on both front and back surfaces of each packing piece 12a. This convex portion 12b is the same material when the material of the packing piece 12a is made of a soft material, but when it is made of a hard material, in order to ensure the packing function, May be integrally formed of different soft materials.
A movable ferrule 16 is mounted on the outer periphery of both ends of the connection pipe 12 so as to be slidable in the vertical direction. In the present embodiment in which the connecting pipe 12 is formed of a soft resin, the movable ferrule 16 can be easily made by elastically deforming the end of the connecting pipe 12, that is, by crushing the packing piece 12a and passing it through the movable ferrule 16. Can be installed. Similar to the fixed ferrule 15, the movable ferrule 16 is an annular member formed of a hard material such as stainless steel or Teflon. The movable ferrule 16 has a horizontal joining surface 16a on the surface facing the fixed ferrule 15, and a tapered surface 16b on the other side. An annular groove 16c is formed on the joint surface 16a.
[0011]
As shown in FIG. 2, the pipes 11 and 12, 12 and 13 are connected to each other using a detachable clamp member 17. The clamp member 17 is mounted on the fixed ferrule 15 and the movable ferrule 16 in a joined state so as to fit externally. The substantially arc-shaped clamp pieces 17a and 17a divided in half and one end portions of the clamp pieces 17a are connected to each other. Are connected to and separated from each other in accordance with the turning operation of the thumbscrew 17c. Each clamp piece 17a has a fitting groove 17e into which the fixed ferrule 15 and the movable ferrule 16 are fitted, and further, the fixed ferrule 15 and the movable ferrule 16 are attracted to the inner side of the fitting groove 17e. A tapered surface 17f is formed.
[0012]
Next, an assembling procedure and a disassembling procedure of the pulverized processed product discharge path 14 will be described. When assembling the pulverized processed product discharge path 14, the connecting pipe 12 is set between the discharge pipe 11 and the storage pipe 13 with the processing apparatus main body 2 and the container 3 being aligned. At this time, the convex portion 12 b formed on the packing piece 12 a of the connecting pipe 12 is fitted into the annular groove 15 c of the fixed ferrule 15. Next, both the ferrules 15 are overlapped while the movable ferrule 16 attached to the outer periphery of the connection pipe 12 is superposed on the fixed ferrule 15 of the discharge pipe 11 (or the accommodation pipe 13) with the packing piece 12a of the connection pipe 12 sandwiched therebetween. , 16 is attached with a clamp member 17 in an outer fitting shape. In this state, when the thumbscrew 17c of the clamp member 17 is turned in the tightening direction, the taper surface 17f of the clamp piece 17a pushes the taper surfaces 15b and 16b of both ferrules 15 and 16, and the both ferrules 15 and 16 are accompanied by packing pieces. It joins in the state which compresses 12a. Thereby, the discharge pipe 11, the accommodation pipe 13, and the connection pipe 12 are connected in a sealed manner. On the other hand, when disassembling the pulverized material discharge path 14, the thumbscrew 17c of the clamp member 17 is turned in the loosening direction, and the clamp member 17 is removed. Thereby, the connection between the discharge pipe 11 (or the accommodation pipe 13) and the connection pipe 12 is released, and the connection pipe 12 can be removed.
[0013]
FIG. 6 is an exploded perspective view showing another example of the movable ferrule. The movable ferrule 18 shown in this figure is divided into a plurality of ferrule pieces 18a, and is suitable when the connecting pipe 12 is formed of a hard resin such as Teflon. That is, when the connecting pipe 12 is hard, the packing piece 12a becomes an obstacle, and the integral movable ferrule 16 cannot be mounted. Therefore, by making the movable ferrule 18 a split type as described above, the movable ferrule 18 can be mounted even when the connecting pipe 12 is made of a hard resin material. In addition, as shown in FIG. 6, the movable ferrule 18 has a step-like fitting portion 18 b that is fitted to each other and regulates the positional deviation at the end of each ferrule piece 18 a, so that it can be integrated with the movable ferrule 18. The function equivalent to the movable ferrule 16 of a thing can be exhibited.
[0014]
In the embodiment of the present invention configured as described above, when the connecting pipe 12 is connected to the discharge pipe 11 of the processing apparatus body 2 or the storage pipe 13 of the container 3, the discharge pipe 11 (or the storage pipe 13) is connected. An annular fixed ferrule 15 is fixed to the outer peripheral surface of the end portion, and a flange-like packing piece 12a is integrally formed at the end portion of the connecting pipe 12 made of resin, and further attached to the outer peripheral portion of the connecting pipe 12 The annular movable ferrule 16 is joined to the fixed ferrule 15 with the packing piece 12a interposed therebetween, and this state is held by a detachable clamp member 17, so that one ferrule in the ferrule joint (movable ferrule 16) This eliminates the need for welding (or adhesion), and can reduce the cost of piping. In addition, since the packing piece 12a is integrated with the connecting pipe 12, it is possible to avoid the inconvenience that the packing piece 12a is dropped or the workability is lowered due to difficulty in alignment when disassembling and assembling the piping. Further, since there is one seam T on the pipe inner peripheral side in the pipe connection portion, the transfer resistance in the pipe is reduced, and the stay of the transferred material can be prevented.
[0015]
In addition, annular fitting grooves 15c and 16c having a semicircular cross section are formed on the joint surfaces 15a and 16a of the fixed ferrule 15 and the movable ferrule 16, while the fitting grooves 15c are formed on the front and back surfaces of the packing piece 12a. Since the ring-shaped convex part 12b having a semicircular cross section that fits into the part 16c is formed, not only can the sealing performance of the pipe connection part be improved, but also the positional deviation between the ferrules 15 and 16 can be prevented.
In addition, when the packing piece 12a is a hard material, the convex portion 12b is formed of a soft material in which only the portion is made of a different material, so that the sealing property of the pipe connection portion can be reliably maintained. .
[0016]
In addition, since the packing piece 12a is integrally formed at both ends of the connecting pipe 12, it is useful for connecting the pipes 11 and 13 and for adjusting the connection level, and to increase its utility value. it can.
[0017]
Further, since the connecting pipe 12 is formed of a soft resin, the integral movable ferrule 16 can be easily attached, and the displacement of the pipes 11 and 13 can be absorbed, so that the position of the processing apparatus main body 2 and the container 3 can be reduced. In addition to facilitating alignment, it is possible to avoid the inconvenience that a load due to misalignment acts on the processing apparatus body 2.
[0018]
In addition, since the movable ferrule 18 shown as another example is divided into a plurality of ferrule pieces 18a, the connecting ferrule 18 is formed of a hard material, and the movable ferrule 18 can be mounted even when deformation insertion is difficult. .
[0019]
Moreover, since the fitting part 18b which fits mutually and regulates a positional shift is formed at the end part of each ferrule piece 18a, the same function as the movable ferrule 16 of an integral object can be exhibited at the time of mounting. it can.
[0020]
【The invention's effect】
The present invention is a pipe connection structure configured to disassemble and assemble piping by connecting each of the pipes 11 and 13 set in advance to each other through the connecting pipe 12 between the ends and releasing the connection. An annular fixed ferrule 15 is fixed to the outer peripheral surface of the end of each of the pipes 11 and 13, and a hook-shaped packing piece 12a is integrally formed at both ends of the connecting pipe 12 made of resin. Further, two annular movable ferrules 16 are attached to the outer peripheral portion of the connecting pipe 12 and annular fitting grooves 15c and 16c are formed on the joint surfaces 15a and 16a of the fixed ferrule 15 and the movable ferrule 16. to one, the the surface and the rear surface side of each of the packing pieces 12a, allowed forming the convex portion 12b to be fitted the annular groove 15c, to 16c, the Each pipe the packing piece 12a on the opposite ends fixed ferrule 15 is fixed, and 12a are connected pipe 12 which is integrally molded, the packing piece 12a in the annular groove 15c of the fixed ferrule 15 to the separation The surface-side convex portion 12b is fitted , the joint surfaces of the pipe 11 (13) and the connecting pipe 12 are in contact with each other , set and aligned, and the movable ferrule 16 is sandwiched between the packing pieces 12a. The fixed ferrule 15 is fixed by fitting the annular fitting groove 16c of the movable ferrule 16 to the rear surface side convex portion 12b and joining it to the fixed ferrule 15 , and holding the joined state by a detachable clamp member 17. has been one of the packing piece 12a at both ends to the pipe 11, 12a is connected to one end of the connecting pipe 12 which is integrally molded, the fixed ferrule By 15 it has been configured to connect the other pipe 13 which is fixed to the other end of the connecting pipe 12,
One of the ferrules in the ferrule joint can be made welding-free (or adhesive-free) to reduce the cost of piping. In particular, in the case of connections that require repeated disassembling / assembling work of piping, By simply butting the joint surfaces of the connecting pipe 13 and the connecting pipe 12 with each other, the positioning can be performed reliably and easily, and there is no inconvenience that the workability is lowered due to the removal of the packing pieces or the difficulty of positioning, and the inner circumference of the pipe It is possible to prevent the stay of the transported material in the pipe. As a result, the connecting pipe 12 itself has a packing function capable of enhancing the sealing performance of the pipe connecting portion, as well as a connection for adjusting the connection level that can prevent the positional deviation between the pipes 11 and 13 and connect them. It can be provided with a positioning function, and its utility value can be increased.
[Brief description of the drawings]
FIG. 1 is an overall side view of a granular material processing apparatus.
FIG. 2 is a cross-sectional view of piping constituting a pulverized processed product discharge path.
FIG. 3 is a cross-sectional view of a connection pipe.
4 is a cross-sectional view taken along the line AA in FIG. 3;
FIG. 5 is a perspective view of a clamp member.
FIG. 6 is an exploded perspective view showing another example of the movable ferrule.
FIG. 7 is a cross-sectional view showing a conventional ferrule joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Powder processing apparatus 2 Processing apparatus main body 3 Container 3a Caster 4 Base 5 Frame 6 Processing chamber 7 Motor 8 Coupling 9 Raw material input pipe 11 Discharge pipe 10 Raw material input hopper 12 Connection pipe 12a Packing piece 12b Protrusion part 13 Containment pipe 14 Milled material discharge path 15 Fixed ferrule 15a Joint surface 15b Tapered surface 15c Annular groove 16 Movable ferrule 16a Joint surface 16b Tapered surface 16c Annular groove 17 Clamp member 17a Clamp piece 17b Connection member 17c Butterfly screw 17d Tightening tool 17e Fitting groove 17f Tapered surface 18 Movable ferrule 18a Each ferrule piece 18b Fitting portion T Seam

Claims (6)

A pipe connection structure configured to disassemble and assemble piping by connecting and releasing each of the pipes that are set apart in advance through a connecting pipe between the ends of the pipes. An annular fixed ferrule is fixed to the outer peripheral surface of the end portion, and flange-shaped packing pieces are integrally formed at both ends of the connecting pipe made of resin, respectively. Two movable ferrules are mounted, and annular fitting grooves are formed on the joint surfaces of the fixed ferrules and the movable ferrules, and fitted to the annular fitting grooves on the front and back sides of the respective packing pieces. allowed forming a convex portion, the fixing ferrule is fixed to each pipe and the connection pipe packing piece at both ends are integrally molded, the fixed ferrule the separation Johama groove to tighten mating fitting surface side protruding portion of the packing piece, and the alignment set by interviewing the joining faces of the pipe and the connecting pipe, the movable ferrule, the state sandwiching the packing piece One pipe on which the fixed ferrule is fixed by fitting the annular fitting groove of the movable ferrule to the back side convex portion and joining the fixed ferrule and holding the joined state with a detachable clamp member said end portions packing piece connects one end of the connecting pipe which is integrally molded on, it is constructed so as to connect the other pipe in which the fixing ferrule is fixed to the other end of the connecting pipe Characteristic pipe connection structure.   2. The pipe connection structure according to claim 1, wherein the convex portion is formed of a soft material different from the packing piece.   3. The pipe connection structure according to claim 1, wherein the connection pipe is made of a soft resin.   The pipe connection structure according to any one of claims 1 to 3, wherein the movable ferrule is divided into a plurality of ferrule pieces.   5. The pipe connection structure according to claim 4, wherein a fitting portion that is fitted to each other and restricts positional deviation is formed at an end portion of each ferrule piece.   A resin pipe with packing pieces, which is used as the connection pipe according to any one of claims 1 to 5.

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