JP2016205531A - Connection joint for pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection joint capable of improving efficiency of spiral pipe connection work, connecting the spiral pipes without increasing the number of connection joints, and restricting a cost of the connection work.SOLUTION: There are provided a plurality of connection pipes 1A, 1B to which spiral pipes are connected and a connecting part 2 rotatably connecting the connection pipes to each other around axes of the connection pipes. The connection pipe comprises an insertion port 10 assured at one end side of the connection pipe and into which the spiral pipe is inserted and a female thread part 11 to which a male thread part arranged at an outer periphery of the spiral pipe is engaged at its inner periphery. The connecting part comprises a fitting recess part 2A and a fitting salient part 2B arranged over the other end sides of the connection pipes. The fitting recess part is arranged at a circumference in coaxial with the axis of the connection pipe, and the fitting salient part is protruded in a radial direction toward the fitting recess part in such a manner that it is freely fitted to the fitting recess part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connection joint for piping for connecting pipes, and more particularly to a connection joint for piping used for screw-in connection of spiral pipes.

  2. Description of the Related Art Conventionally, a connection joint for piping that connects spiral pipes having spiral-shaped uneven portions (hereinafter referred to as “male thread portions”) on the outer periphery has been formed into a tubular shape as described in Patent Document 1 below. 2. Description of the Related Art A spiral-shaped uneven portion (hereinafter referred to as “female screw portion”) on which an external thread of a spiral tube is screwed is known on an inner peripheral surface.

  In the connection joint described in Patent Document 1, one spiral pipe is screwed from one end of the connection joint, and the other spiral pipe is screwed from the other end of the connection joint to connect the spiral pipes in the axial direction. In addition, since it is a connection by screwing, it can be easily connected and the reliability of maintaining the connected state can be improved.

Japanese Patent No. 3867859

  When the spiral pipe is screwed into the connecting joint, the spiral pipe is turned in the axial direction and screwed into the connecting joint, or the connecting joint is turned in the axial direction and the spiral pipe is screwed into the connecting joint. Either method is used.

  A spiral tube has a male threaded portion made of a spiral in one direction and is molded so as to be long in the axial direction. Usually, the spiral tube is wound around a winding tool such as a reel for carrying and setting work. ing.

  The installation operation of the spiral tube is sequentially performed while pulling out the spiral tube from the reel, cutting the spiral tube when the spiral tube is pulled out to a predetermined length, and screwing the cut spiral tube into the connection joint.

  In addition, when the length of the spiral pipe to be installed is long, it is difficult to screw the spiral pipe into the connecting joint. The spiral tube is screwed into the connection joint by turning in the axial direction.

  However, since the spiral of the male thread portion of the spiral tube is in one direction, the connection joint is rotated in the direction in which the other spiral tube is screwed into the connection joint while one spiral tube is screwed into one end of the connection joint. Then, the direction of rotation is the direction in which the screwing of one spiral tube is removed from the connection joint, so the spiral tube on the other side must be rotated. As a result, the efficiency of the connection work deteriorates. There was a problem that.

  In addition, a method of shortening the length of the spiral tube and rotating the spiral tube to be screwed into the connection joint is also conceivable. However, with such a method, the number of connections between the spiral tubes increases. As the number of operations increases, the number of connection joints also increases, resulting in a problem that the efficiency of the connection operation deteriorates due to the increase in the number of connection operations, and the cost increases due to the increase in the number of connection joints.

  Furthermore, when changing the piping direction of a spiral pipe, the shape of an elbow or cheese is used for the connection joint. In the case of such a connection joint, depending on the piping location, the connection joint There is a problem that it is difficult to rotate the tube, and the efficiency of connection work of the spiral tube is further deteriorated.

  This invention makes it an example of a subject to cope with such a problem. That is, regardless of the length of the installed spiral pipe and the piping direction of the spiral pipe, the spiral pipe is screwed into one end and the other end of the connection joint by rotation about the axis of the connection joint. Therefore, the spiral pipes can be connected to each other, thereby improving the efficiency of the connection work of the spiral pipes, making it possible to connect without increasing the number of connection joints, and reducing the cost of the connection work of the spiral pipes. It is an object of the present invention to be able to.

  In order to achieve such an object, the present invention comprises at least the following configuration.

  A connection joint for piping for connecting a plurality of spiral pipes by screwing, wherein the connection joint includes a plurality of connection pipes to which the spiral pipe is connected and an axis of the connection pipe. A connecting portion that rotatably connects each other, and the connection pipe is secured on one end side of the connection pipe, and an insertion port into which the spiral pipe is inserted, and an outer periphery of the spiral pipe on an inner periphery A male threaded portion that engages with a male threaded portion, and the coupling portion includes a fitting concave portion and a fitting convex portion provided so as to extend across the other end sides of the connecting pipe, and the fitting The concave portion is provided so as to be coaxial with the axis of the connecting pipe, and the fitting convex portion is provided so as to project radially toward the fitting concave portion so as to loosely fit into the fitting concave portion. It is the connection joint for piping characterized by these.

  By having such characteristics, the present invention has the following effects. That is, regardless of the length of the installed spiral pipe and the piping direction of the spiral pipe, the spiral pipe is screwed into one end and the other end of the connection joint by rotation about the axis of the connection joint. The spiral tubes can be connected. As a result, the efficiency of the connecting operation of the spiral tube can be increased, the connection can be made without increasing the number of connecting joints, and the cost of the connecting operation of the spiral tube can be suppressed.

It is a partially notched front view of the connection joint which concerns on 1st Embodiment of this invention, and shows the state which connected one side of the spiral tube. FIG. 2 is a sectional view taken along line (2)-(2) in FIG. 1. It is a partially notched front view which shows the state which isolate | separated the connection coupling. It is a front view of the connection joint concerning a 2nd embodiment of the present invention. It is a front view which shows the other example of the connection coupling which concerns on 2nd Embodiment of this invention. It is a partially notched front view of the connection joint which concerns on 3rd Embodiment of this invention.

  The connecting portion includes an insertion portion on an outer periphery on the other end side of one of the connection pipes, and an insertion portion on which the insertion portion is inserted on an inner periphery on the other end side of the other connection pipe, It is preferable that the fitting concave portion or the fitting convex portion is disposed on the outer periphery of the insertion portion, and the fitting concave portion or the fitting convex portion is disposed on the inner periphery of the inserted portion.

  Further, the connecting portion includes a connecting tube interposed between the plurality of connecting tubes, and includes an insertion portion on the outer periphery on the other end side of the connecting tube, and the insertion portion on the inner periphery of the end portion of the connecting tube. Is inserted, the fitting recess or the fitting protrusion is arranged on the outer periphery of the insertion portion, and the fitting recess or the fitting is arranged on the inner periphery of the insertion portion. It is preferable that the convex portion is arranged.

  Moreover, it is preferable that the said connection part can fit and detach the said fitting recessed part and the said fitting convex part.

  Moreover, it is preferable that the said connection coupling is further provided with the bellows part which can deform | transform in the direction where the axis | shaft of this connection joint bends.

  Hereinafter, the connection joint A for piping of 1st Embodiment which concerns on this invention is demonstrated based on FIGS. 1-3. In addition, each embodiment illustrated below does not limit this invention.

  Like the spiral pipe P, the connection joint A is made of a synthetic resin material that is not easily corroded, such as polyethylene, and has elasticity. As shown in FIG. 1, the two spiral pipes P are connected coaxially. And two connecting pipes 1A and 1B for connecting the spiral pipe P, and a connecting part 2 for connecting the connecting pipes 1A and 1B so as to be rotatable around the axes of the connecting pipes 1A and 1B. ing.

  The spiral pipe P has a male threaded portion P1 made of a spiral centering on the axis of the spiral pipe P protruding from the outer periphery, and the male threaded part P1 is screwed from one end side of the connecting pipes 1A and 1B. .

  The connecting pipes 1A and 1B are female threaded portions that secure the insertion ports 10 and 20 into which the spiral pipe P is inserted on one end side of the connecting pipes 1A and 1B, and that the male threaded portion P1 of the spiral pipe P is screwed to the inner periphery. 11 and 21 are formed, and the spiral tube P is inserted from the insertion ports 10 and 20 so that the male screw portion P1 is screwed into the female screw portions 11 and 21.

  The connecting portion 2 includes a fitting concave portion 2A and a fitting convex portion 2B provided so as to extend across the other end sides (opposite sides of the insertion ports 10 and 20) facing each other in the axial direction of the connecting pipes 1A and 1B. The fitting pipes 1A and 1B are integrated with each other by fitting the fitting concave part 2A and the fitting convex part 2B to each other.

  Further, the connecting portion 2 includes an insertion portion 30 secured on a part of the outer periphery in a range from the other end side of the connection pipe 1A to the insertion port 10, and a range of the connection tube 1B from the other end side to the insertion port 20. A part to be inserted is provided with a portion to be inserted 31 secured as a range in which the insertion portion 30 is inserted.

  The fitting recesses 2 </ b> A are formed in an annular shape around the axis of the insertion portion 30 on the outer periphery of the insertion portion 30, and are formed in a plurality of rows adjacent to each other along the axis of the insertion portion 30.

  On the other hand, a plurality of fitting protrusions 2B are provided on the inner periphery of the inserted portion 31 so as to be aligned along the circumferential direction centered on the axis of the inserted portion 31, and are fitted adjacently in the circumferential direction. In the state where the same space is secured between the convex portions 2B and the insertion portion 30 is inserted into the insertion portion 31, the shaft of the insertion portion 31 is placed at a position where all the insertion recesses 2A are fitted. A plurality of rows are formed so as to be adjacent to each other.

  The fitting concave portion 2A and the fitting convex portion 2B are formed so as to be loosely fitted to each other, and in the fitted state, the connecting pipes 1A and 1B are centered on the axes of the connecting pipes 1A and 1B. Can be rotated with each other.

  Further, the fitting concave portion 2A and the fitting convex portion 2B are freely detachable, and when the insertion portion 30 is inserted into the inserted portion 31, the fitting convex portion 2B is elastically deformed by the pressure during insertion, and is elastic. When the deformed fitting convex portion 2B reaches a position facing the fitting concave portion 2A, the fitting convex portion 2B returns to its original state from elastic deformation so that it can be fitted into the fitting concave portion 2A.

  On the other hand, when the insertion portion 30 is extracted from the insertion portion 31, the fitting convex portion 2B comes into contact with the side wall of the fitting concave portion 2A and can be escaped from the fitting concave portion 2A by being deformed by the pressure during the extraction operation. Has been.

  As described above, since the fitting recess 2A and the fitting projection 2B can be freely fitted and detached, the connecting pipes 1A and 1B can be freely connected and separated. The connection pipes 1A and 1B can be exchanged, and the connection pipes 1A and 1B can be connected to each other after the spiral pipe P is screwed into each of the connection pipes 1A and 1B.

  According to the connecting joint A provided with the connecting portion 2 having the above-described configuration, the connecting pipes 1A and 1B are connected to each other so that they can be rotated around the axes of the connecting pipes 1A and 1B. Even when the spiral pipe P is screwed into the connecting pipe 1A (or the connecting pipe 1B), the connecting pipe 1A (or the connecting pipe 1B) can be rotated in the direction in which the spiral pipe P is screwed. It is possible to prevent the rotation of the tube 1B) from being transmitted to the connecting tube 1B (or the connecting tube 1A).

  Therefore, when connecting the spiral pipe P to both of the connecting pipes 1A and 1B, the spiral pipe P can be connected by rotating the connecting pipes 1A and 1B without rotating the spiral pipe P. Even with a long spiral tube P, the connection work can be performed easily and quickly.

  Further, since the connection pipes 1A and 1B can be connected by the connecting portion 2 after the connection of the connection pipes 1A and 1B is released and the spiral pipe P is connected to each of the connection pipes 1A and 1B. The method of connecting 1A and 1B in a connected state and the method of connecting and connecting the connection tubes 1A and 1B after connecting the spiral tube P to the connection tubes 1A and 1B that have been disconnected are selectively used depending on the situation in the field. be able to.

  In addition, the connection part 2 is good also as a form which cannot isolate | separate connection pipe 1A, 1B.

  According to the connection joint A having the above-described configuration, regardless of the length of the installed spiral pipe P, the connection of the spiral pipe P to the connection pipes 1A and 1B by the rotation of the connection pipes 1A and 1B, Spiral tubes P can be connected together.

  As a result, the efficiency of the connection work of the spiral pipe P can be increased, the connection can be made without increasing the number of the connection joints A, and the cost of the connection work of the spiral pipe P can be suppressed.

  Next, the connection joint B of 2nd Embodiment which concerns on this invention is demonstrated based on FIG. In addition, description about the part which overlaps with the connection joint A of 1st Embodiment is abbreviate | omitted by attaching | subjecting a same sign to drawing.

  The connection joint B is an elbow used when changing the piping direction of the spiral pipe P.

  The connecting portion 2 of the connection joint B includes an insertion portion 31 secured on the inner periphery on the other end side facing the insertion ports 10 and 20 secured in one end portions of the two connection pipes 1C and 1D in the axial direction. , 31 and elbow pipe 2C (connecting pipe) having both ends inserted and connected to the insertion parts 31, 31; insertion parts 30, 30 secured at both ends of the elbow pipe 2C; The fitting convex part 2B protrudingly provided by 31 and 31 and the fitting concave part 2A recessed by the insertion parts 30 and 30 are provided.

  In this connection joint B, by inserting the insertion portions 30 and 30 of the elbow pipe 2C into the insertion portions 31 and 31 of the connection pipes 1C and 1D, the fitting convex portion 2B and the fitting concave portion 2A are loosely fitted to each other. Thus, the connecting pipes 1C and 1D are coupled to the elbow pipe 2C so as to be rotatable about the axis.

  That is, the connecting pipes 1C and 1D are connected to the elbow pipe 2C so as to be rotatable about the axis. The rotation of the connecting pipes 1C and 1D can be performed independently so as not to be transmitted to the elbow pipe 2C.

  Therefore, even when the pipe direction of the spiral pipe P is changed, when connecting the spiral pipe P to both of the connection pipes 1A and 1B, the connection pipes 1A and 1B are rotated without rotating the spiral pipe P. By doing so, the spiral tube P can be connected.

  The connecting portion 2 of the connecting joint B may be configured such that the connecting pipes 1C and 1D can be connected to and separated from the elbow pipe 2C, or may not be separable.

  Moreover, the connection part 2 of the connection joint B is good also as a form distribute | arranged to either one of the insertion parts 30 and 30 of the elbow pipe 2C on a drawing (not shown).

  As shown in FIG. 5, the connection joint C can also have a cheese shape used when branching the pipe in the pipe path of the spiral pipe P.

  The connecting portion 2 of the connection joint C includes a cheese tube (connecting tube) 2D, insertion portions 30, 30, and 30 secured at three ends of the cheese tube 2D, and the insertion portions 30, 30, and 30. The insertion portions 31, 31, 31 secured on the other end side facing the insertion ports 10, 10, 10 of the connecting pipes 1E, 1F, 1G in the axial direction, and the outer periphery of the insertion portions 30, 30, 30 are recessed. The fitting concave portion 2A and the fitting convex portion 2B protruding from the inserted portions 31, 31, 31 are provided.

  The shapes of the insertion portions 30, 30, 30, the inserted portions 31, 31, 31, the fitting concave portion 2A, and the fitting convex portion 2B are the same as the connecting portion 2 of the connection joint B. 1F and 1G are respectively independently connected to the cheese tube 2D so as to be rotatable about the axis.

  Therefore, even when the piping direction of the spiral pipe P is changed, when connecting the spiral pipe P to the connecting pipes 1E, 1F, and 1G, the connecting pipes 1E, 1F, and 1G are not rotated without rotating the spiral pipe P. The spiral tube P can be connected by rotating.

  The connecting portion 2 of the connection joint C may be configured such that the connection pipes 1E, 1F, and 1G are connected to and separated from the cheese pipe 2D, or may not be separated.

  In addition, the connecting portion 2 of the connection joint C is only on the side of the insertion portion 30 protruding above the cheese tube 2D on the drawing, or only on either one side of the insertion portions 30 on the left and right of the cheese tube 2D on the drawing. May be arranged on the side of the insertion part 30 protruding above the cheese tube 2D and either one of the left and right insertion parts 30 in the drawing (not shown).

  According to the connection joints B and C having the above-described configuration, the connection pipes 1C to 1G are respectively rotated by the rotation of the connection pipes 1C to 1G regardless of the length of the installed spiral pipe P and the piping direction of the spiral pipe. The spiral tubes P can be connected by screwing the spiral tubes P together.

  As a result, the efficiency of the connection work of the spiral pipe P can be increased, the connection can be made without increasing the number of the connection joints A, and the cost of the connection work of the spiral pipe P can be suppressed.

  Next, the connection joint D of 3rd Embodiment which concerns on this invention is demonstrated based on FIG. In addition, description about the part which overlaps with the connection joint A of 1st Embodiment is abbreviate | omitted by attaching | subjecting a same sign to drawing.

  In the connection joint D, similarly to the connection joint A, the connection pipes 1A and 1B are connected to each other through the connecting portion 2 so as to be rotatable about the axis, and further, in the middle of the connection pipes 1A and 1B. The bellows part 5 is formed in the range.

  The bellows part 5 is formed by arranging a part of the peripheral wall of the connecting pipes 1A, 1B as an uneven surface composed of a plurality of unevennesses 50, 51 and arranging the unevennesses 50, 51 along the axial direction. The connecting pipes 1A and 1B are bent and deformed in the direction in which the shaft is bent.

  That is, when the connection pipes 1A and 1B are rotated during the connection work of the spiral pipe P, and when the connection joint D is heavy after the spiral pipe P is piped, When the force is concentrated on the connecting portion 2, this force is absorbed by the bending deformation of the bellows portion 5.

  The bellows part 5 can also be provided in the connection pipes 1C to 1G in the connection joint B and the connection joint C, and can also be provided in the elbow pipe 2C of the connection joint B and the cheese pipe 2D of the connection joint C.

  The connecting portion 2 of the connection joint D may have a form in which the connecting pipes 1A and 1B can be connected and separated, or a form in which the connecting pipes 1A and 1B cannot be separated.

  Therefore, according to the connecting joint D, the same effect as the connecting joints A to C is provided, and the bellows portion 5 that absorbs the force from the radial direction to the connecting joint D by bending deformation is provided. During the connection work of P or after piping, the insertion portion 30, the inserted portion 31, the fitting concave portion 2A, and the fitting convex portion 2B constituting the connecting portion 2 are prevented from being damaged. Extra work such as the addition of the joint D and an increase in cost can be suppressed.

  In addition, about a connection pipe, it is not limited to the illustrated elbow pipe 2C and cheese pipe 2D, if it is the thing of the shape which changes the piping direction of the spiral pipe P, and the shape which branches the piping of the spiral pipe P Good (not shown).

  Further, the connecting pipe is not limited to a shape that changes the piping direction of the spiral pipe P and a shape that branches the pipe of the spiral pipe P, and may be a straight pipe shape.

P: Spiral pipe P1: Male thread A: Connection joint B: Connection joint C: Connection joint D: Connection joint 1A: Connection pipe 1B: Connection pipe 1C: Connection pipe 1D: Connection pipe 1E: Connection pipe 1F: Connection pipe 1G: Connecting pipe 2: Connecting part 2A: Fitting concave part 2B: Fitting convex part 2C: Elbow pipe 2D: Cheese pipe 10: Insertion port 11: Female screw part 12: Female screw part 30: Inserting part 31: Inserted part 5: Bellows part

Claims (5)

A connection joint for piping that connects a plurality of spiral tubes by screwing,
The connection joint includes a plurality of connection pipes to which the spiral pipe is connected, and a connecting portion that rotatably connects the connection pipes around the axis of the connection pipe,
The connection pipe is provided on one end side of the connection pipe, and includes an insertion port into which the spiral pipe is inserted, and an internal thread portion into which an external thread portion provided on the outer periphery of the spiral tube is screwed.
The connecting portion includes a fitting recess provided so as to extend over the other ends of the connection pipe, and a fitting projection.
The fitting recess is provided so as to be coaxial with the axis of the connecting pipe, and the fitting protrusion is provided in a radial direction toward the fitting recess so as to be loosely fitted to the fitting recess. A connecting joint for piping, characterized by   The connecting portion includes an insertion portion on an outer periphery on the other end side of one of the connection pipes, and an insertion portion on which the insertion portion is inserted on an inner periphery on the other end side of the other connection pipe, The fitting concave portion or the fitting convex portion is disposed on the outer periphery of the insertion portion, and the fitting concave portion or the fitting convex portion is disposed on the inner periphery of the inserted portion. The connecting joint for piping according to claim 1.   The connecting part includes a connecting pipe interposed between the plurality of connecting pipes, and includes an insertion part on the outer periphery on the other end side of the connecting pipe, and the insertion part is inserted on the inner periphery of the end part of the connecting pipe. The fitting recess or the fitting projection is disposed on the outer periphery of the insertion portion, and the fitting recess or the fitting projection on the inner periphery of the insertion portion. The connecting joint for piping according to claim 1, wherein   The connection joint for piping according to any one of claims 1 to 3, wherein the coupling portion is detachable from the fitting concave portion and the fitting convex portion.   The connection joint for piping according to any one of claims 1 to 4, wherein the connection joint further includes a bellows portion that is deformable in a direction in which a shaft of the connection joint is bent.

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