JPH0562785U - Pipe joint connection structure - Google Patents

Abstract

(57) [Summary] [Purpose] By connecting the inner peripheral surface of the pipe in a flush state without creating an unreasonable step on the inner peripheral surface side of the connection part of the pipe,
An object of the present invention is to provide a pipe joint connection structure capable of preventing damage to a solid material. [Structure] Ends 2 and 2 of pipes 1 and 1 which are butted to each other
A pair of clamp flanges 3 and 3 provided on the outer periphery of the
However, in order to separate the end portions 2 and 2 of the tubular bodies 1 and 1 from each other in the axial direction of the tubular bodies 1 and 1, the end portions 2 and 2 of the tubular bodies 1 and 1 project in the abutting direction from the end portions 2 and 2, Between the ends 2 and 2 of the pipes 1 and 1 which are separated from each other, one or a plurality of collar cylinders 6 having an inner diameter D larger than the inner diameter D1 of the pipes 1 and 1 are provided on the flanges 3 and 3. Is inserted in the gasket 4,
Moreover, the inner peripheral surfaces of the ends 2 and 2 of the tubular bodies 1 and 1 are tapered so as to be flush with the inner peripheral surface of the collar cylinder 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure of a pipe joint used for a pneumatic transportation pipe of a solid material such as a tablet.

[0002]

[Prior Art]

 Conventionally, as an example of the connecting structure of this type of pipe joint, there is one shown in FIG. This conventional structure has a ring-shaped gasket 4e in which flanges 3e, 3e integrally formed at the ends of the tubular bodies 1e, 1e are opposed to each other and a bulge 4d is formed in the center between them. Is clamped by the clamp band 5 with the bulging portion 4d fitted in the ring grooves 1f, 1f formed in the abutting end faces of the two tubular bodies 1e, 1e with the gasket 4e interposed. , Both tube bodies 1e, 1e were connected.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional connection structure, it is difficult to exactly match the inner diameter of the gasket 4e that is clamped and compressed and deformed with the inner diameter of the pipes 1e and 1e, and both pipes 1e and 1e abut against each other. At the position of the formed inner peripheral surface, it is inevitable that a stepped portion 10 as a gap portion or a convex stepped portion in which the gasket 4e protrudes inward from the inner peripheral surface of the tubular bodies 1e, 1e occurs. .. Further, when the pipes 1e, 1e are extruded vinyl chloride pipes, for example, both pipes 1e, e have a dimensional error in manufacturing due to their inner diameters, and are easily deformed by a clamp. For this reason, the step portion 10 formed on the inner peripheral surface side of the tubular body tends to be further increased. As a result, conventionally, there is a problem that a solid material such as a tablet, which has been pneumatically transported at a low speed, collides with the step portion 10 and is damaged. In view of the above points, the present invention prevents damage to the solid material by connecting the inner peripheral surface of the pipe in a flush state without creating an unreasonable step on the inner peripheral surface side of the connecting portion of the pipe. The purpose is to provide a possible connection structure for pipe joints.

[0004]

[Means for Solving the Problems]

 The connection structure for a pipe joint according to the present invention, which is proposed to achieve the above object, includes a pair of flanges for clamping provided on the outer circumferences of the ends of the pipes that are butted against each other. In order to separate the end portions from each other in the axial direction of the pipe body, the end portions of the pipe body are projected in the abutting direction more than the end portions of the pipe body, and the space between the separated end portions of the pipe body is larger than the inner diameter of the pipe body. Also, one or a plurality of collar cylinders each having a large inner diameter are inserted into the flange and the gasket, and the inner peripheral surface of each end of the pipe body is the inner periphery of the collar cylinder. The structure is tapered so that it is flush with the surface.

[0005]

[Action]

 In the pipe joint connection structure characterized by the above structure, the two flanges are clamped at the outer periphery of the pipe body so that the two pipe bodies are connected to each other in a butting state with the collar cylinder body sandwiched therebetween. The gasket is squeezed between the flanges to provide a proper airtight seal. Thus, the inner peripheral surface of each end of the tube body is flush with the inner peripheral surface of the collar cylinder due to the tapering process, so no concave or convex step is formed in these inner peripheral surface portions. .. Since the color tubular body is fitted inside the flange and the gasket, the gasket does not protrude to the inner peripheral surface of the pipe connecting part, and the stepped portion caused by the size of the gasket size Does not occur on the peripheral surface side of the tube. Further, since the collar cylinder is fitted inside the flange protruding in the abutting direction from each end of the pipe, when the flange is clamped, the clamping force directly acts on the pipe. Things are also eliminated. Therefore, even if the tubular body is made of a material that is relatively easily deformed, the clamp prevents the end portions of the tubular body from being inadvertently deformed, and the inner circumferential surface of the tubular body is kept flush.

[0006]

【Example】

 An embodiment of a pipe joint connection structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of the main part of the connection structure, in which the outer circumferences of the respective end portions 2 of the two pipe bodies 1 made of vinyl chloride, etc., which constitute the transport pipe for solid matter, face each other. Clamping flanges 3 and 3 having substantially L-shaped cross-sections having flanges 3a and 3a are fixed by an adhesive or the like. However, the flanges 3 and 3 are projected from the end portions 2 and 2 of the tubular bodies 1 and 1 by a dimension S in the abutting direction, and the end portions 2 and 2 are spaced apart by about twice the dimension. Is set to a state. The collar tubular body 6 is formed of a hard material such as stainless steel into a cylindrical shape having a width L slightly larger than about twice the dimension S, and the tubular portions 3b of the flanges 3 and 3 are formed. 3b is fitted in and is interposed between the ends 2 and 2 of the tubular bodies 1 and 1, respectively. The inner diameter D is set to be slightly larger than the inner diameter D1 of the tubular bodies 1 and 1. The ends 2 and 2 of the pipes 1 and 1 are abutted against both ends of the collar cylinder 6, and the inner diameters of the ends 2 and 2 are the same as the inner diameter of the collar cylinder 6 on their inner peripheral surfaces. Gradual tapered surfaces 7 and 7 are formed so as to gradually match. As a result, the inner peripheral surfaces of the tubular bodies 1 and 1 are set to be smooth and flush.

A ring-shaped gasket 4 made of Teflon or the like is interposed between the pair of flanges 3 and 3 so as to be fitted onto the collar cylinder 6. The gasket 4 is appropriately provided with a thick bulging portion 4a for enhancing the airtight sealing effect, and the bulging portion 4a is fitted into the concave grooves 3c provided on the respective facing surfaces of the flanges 3 and 3. It is positioned. The clamp band 5 is externally fitted and attached across both of the pair of flanges 3 and 3, and has a function of clamping between the flanges 3 and 3.

In the connection structure having the above-described configuration, the connection step portion between the flanges 3 and 3 which sandwiches the gasket 4 located outside the collar cylinder 6 is located on the inner peripheral surface side of the pipes 1 and 1. There is nothing to do. Moreover, since the end portions 2 and 2 of the tubular bodies 1 and 1 and the collar tubular body 6 are butted against each other in a flush state, an undesired step portion is formed on the inner peripheral surface side of the tubular bodies 1 and 1 after all. Does not exist. Even if both flanges 3 and 3 are firmly clamped by the clamp band 5, the clamping force is applied to the hard collar cylinder 6 with a relatively large force, but both sides of the collar cylinder 6 are affected. It does not directly act as a compressive force on the ends 2 and 2 of the tubular bodies 1 and 1 spaced apart from each other. Therefore, it is possible to avoid that the pipes 1 and 1 made of vinyl chloride are unduly greatly deformed and a step is formed at the portion where the pipes 1 and the collar 6 are abutted with each other. Maintained at. Therefore, even if a solid material such as a tablet that easily breaks reaches the connection portion of the pipes 1 and 1, the solid material can be smoothly transported without damaging the connection portion.

In the above embodiment, one color cylinder 6 was used, but the present invention is not limited to this. For example, as shown in FIG. 2, two color cylinders 6A, 6A, which are divided into two parts in the width direction on the left and right sides, may be interposed between the ends 2, 2 in a parallel state (note that FIG. The parts with the same reference numerals indicate the same parts and members as those shown in FIG. 1). Unlike the general long pipes or the extrusion-molded pipes, the collar cylinders 6A, 6A made of stainless steel or the like can have their inner diameter dimensions matched with each other with high accuracy, so that both collar cylinders 6A, 6A, 6A can be set in a state in which a step is not generated in a portion where the 6A abuts each other, and the inner peripheral surface of the tubular body can be set to be flush with each other as in the above-described embodiment. Further, the gasket 4A shown in the figure is a simple hollow ring-shaped member made of silicon or the like which is fitted into the concave groove 3c and positioned, but the specific structure of the gasket is not limited at all in the present invention. However, in terms of gasket mounting work, there is an advantage that the flat type shown in FIG. 1 is less likely to be displaced. Besides, in the present invention, all the specific configurations of the respective parts can be arbitrarily modified within the scope intended by the present invention.

[0010]

[Effect of the device]

 As is clear from the above description, according to the pipe joint connection structure of the present invention, both ends of the pipe body can be butt-connected in a flush state through the collar cylinder, and an undesired step portion can be formed inside. Since it does not exist, it has an excellent effect that the solid matter to be transported is not damaged and the solid matter that is easily damaged such as tablets can be appropriately transported. In particular, the present invention can prevent the deformation of the end of the pipe body when clamping the flange, and can also suppress the generation of the stepped portion due to the deformation of the pipe body. Great for connecting the body.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a connection structure for a pipe joint according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing another embodiment of the pipe joint connection structure according to the present invention.

FIG. 3 is a longitudinal cross-sectional view of a main portion showing a conventional pipe joint connection structure.

[Explanation of symbols]

 1 Tubular Body 2 End 3 Flange 4 Gasket 5 Clamp Band 6 Color Cylindrical Body 6A Color Cylindrical Body 7 Tapered Surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Innovator Sada Miwa 54-23, Fuji Village, Mishima City, Shizuoka Prefecture 54-23 (72) Inventor, Kazuei Murata 2-7-2 Asuka Minamino, Ikoma City, Nara Prefecture

Claims (1)

[Scope of utility model registration request] 1. A pipe joint connecting structure, wherein a pair of flanges for clamping that sandwich a gasket are provided opposite to each other on the outer circumference of each end of pipes that are butted against each other. The flange is provided so as to project in the abutting direction from the respective end portions of the pipe body so as to separate the respective end portions of the pipe body in the axial direction of the pipe body, and between the separated end portions of the pipe bodies. , One or a plurality of collar cylindrical bodies having an inner diameter larger than the inner diameter of the tubular body are inserted into the flange and the gasket, and the inner peripheral surface of each end of the tubular body is A connection structure for a pipe joint, characterized in that it is tapered so as to be flush with the inner peripheral surface of the collar tubular body.