JP4540203B2 - Pipe fusion splicer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe fusion splicer suitable for use in splicing and joining pipe end surfaces of a pair of thermoplastic synthetic resin pipes at an arbitrary angle, and a pipe connecting method using the same.
[0002]
[Prior art]
Conventionally, pipes that are laid from high to low altitudes are difficult to lay when the slope of the laying place is steep. In general, it is laid so as to have a gentle slope, but if the slope is gentle, the length of the pipe line becomes long, requiring a large amount of piping material, and the construction period becomes long. There is a point.
[0003]
On the other hand, there are cases where piping is unavoidable, but in that case, as a method of piping in a steep slope, there is a method of piping using a polyethylene pipe that has less wear and can follow changes in the slope of the slope. Often taken. Usually, in laying a polyethylene pipe, a polyethylene pipe having a unit length is generally connected using an electric fusion joint so-called EF joint to form a pipe line.
[0004]
However, for example, in the case of piping on a steep slope in a mountain, when the gradient of the pipeline partially changes along natural terrain, that is, the pipe axis of the connecting pipe and the connected pipe is not in a straight line at the intersection. In many cases, it is necessary to connect the pipes, which makes it difficult to connect the joints with straight pipes, connect with a curved pipe that matches the change in the gradient, or bend the tube, or change the gradient. It was necessary to set up a manhole at the point. In addition, the EF joint also has a problem in that a slight gap is generated in the joint portion to promote wear.
[0005]
In order to solve the problems in the EF joint, what is necessary is to perform so-called butt fusion in which the tubes are joined by, for example, melting the tube end surfaces of the opposing tubes and joining the melted tube end surfaces. In the conventional butt fusion machine as disclosed in Japanese Patent Application Laid-Open No. 60-174631, the clamp tube shaft that holds the tube end of the tube to be connected is fixed so as to be a straight line. However, there is a problem that connection cannot be made when the connection point is refracted.
[0006]
Further, as disclosed in Japanese Patent Application Laid-Open No. 2000-25115, there is an apparatus that obtains a bent tube by fixing a clamp at an arbitrary angle and joining the tubes at an angle. However, this apparatus is applicable when a pipe line arranged along the ground surface is bent horizontally along the ground surface. If the connection machine body is not arranged at right angles to the pipe and connected, the pipe will not be along the ground surface. If you try to force the pipe along the ground surface, dig the side of the pipe. The connecting machine had to be placed sideways, and in fact it was impossible to apply in such a case.
[0007]
[Problems to be solved by the invention]
The present invention uses a pipe fusion splicing machine capable of butt-connecting pipes arranged by bending the pipe axis up and down with respect to the ground surface by melting the pipe ends and using the pipe fusion splicing machine. It was made for the purpose of providing a pipe connection method that can be constructed at a piping site.
[0008]
[Means for Solving the Problems]
The pipe fusion splicer according to claim 1 of the present invention for solving the above-mentioned problem is to grip the pipe ends of the thermoplastic synthetic resin pipes facing each other with a pair of clamps, cut the end faces of the pipes, It is a pipe fusion splicer that heats and melts a cut surface with a hot plate, butts the melted cut surfaces together for fusion connection, and a pair of clamps are respectively attached to the clamp bases, and the clamp bases are connected to each other. the angle at which the tube axis of the tube between which is gripped in the clamp forms a changeable tube axes is coincident with the tube axis between the angle of the disposed bent et al are in opposite upper and lower tubes, and that The angles are fixed so that the angle can be fixed, and the pair of clamp bases are connected by a connection shaft so as to be rotatable in the tube axis direction of the pipe held by each clamp, and the side surfaces of the respective bases Are provided at regular intervals from the connecting shaft The fixing pin is inserted into the through hole of the fixing plate provided with the through hole, and the fixing pin is inserted into the hole formed at the same distance from the inner connecting shaft of the hole, and the angle formed by each base is predetermined. A pipe cutting machine that cuts the end of each pipe on a plane that includes the bisector of the angle that passes through the intersection of the pipe axes , or that is parallel to the plane, This is a pipe fusion splicer that replaces the pipe cutting machine and the hot plate to heat and melt the pipe cut surface, removes the hot plate immediately after melting, butts the melted pipe end faces and fuses them together.
[0011]
KanToruchaku splicer according to claim 2, wherein the pair of cut surfaces guide is detachably fixed to the auxiliary fixing jig provided on the fixing plate,該補aid fixture is provided at both ends of the fixing plate A pair of clamps has a cutting surface cut by a cutting blade that is mounted at a right angle from a fixing jig at a position equidistant from the through-hole and that moves along one cutting surface guide of the pair of cutting surface guides. located on a plane passing through the intersection of the tube axis of the gripped pipe together, is KanToruchaku splicer according to claim 1, wherein the other of the cut surface guide is on a plane parallel to the cutting plane .
[0012]
KanToruchaku splicer according to the third aspect, provided in the fixed plate auxiliary fixture is pointing instrument or receptacle, receptacle provided on the cutting face guide or hot plate or insert member detachable The pipe fusion splicing according to claim 1 or 2, characterized in that the heat plate is received and fixed, and both surfaces of the heat plate are parallel heat generation surfaces, and at least one heat generation surface is flush with the cut surface. Machine.
[0014]
The pipe connected by the pipe fusion splicer of the present invention is not particularly limited as long as it is a thermoplastic synthetic resin pipe, but is most suitably applied to a polyethylene pipe.
[0015]
Tube connecting method of using the tube fusion splicer of the present invention, even if the tube axes at connection must connect the pipes to each other are bent et vertically, the inclined surface, for example, a slope This is the case when the pipe shafts are laid on the terrain where the pipe shafts swing up and down when the pipes of unit length are arranged with irregular slopes, such as pipe laying work laid along.
[0016]
Since the pipe fusion splicer of the present invention is brought into a construction site and used for piping work, its main constituent member may be a lightweight, rust-resistant and high-strength material, for example, aluminum or An aluminum alloy or the like is preferably applied.
[0017]
The cutting guide of the present invention only needs to have a structure that can prevent the cutting surface from becoming non-planar due to vibration of the saw blade at the time of cutting, for example, when the tube cutting method is a backward-moving saw. The two plate-like bodies provided with a guide groove through which the saw blade can pass in the center are opposed to each other and are moved backward through the saw blade between the respective guide grooves.
[0018]
The hot plate used in the present invention is not particularly limited as long as both sides are heat generating surfaces parallel to each other and the molten thermoplastic synthetic resin tube is difficult to adhere, but as an example, between two metal flat plates such as aluminum. An electric heating wire such as a nichrome wire is laminated to form a heating plate, and the outer side of the heating plate is covered with a fluorine-type synthetic resin or the like to prevent adhesion of the molten resin.
[0019]
The cutting machine guide and the hot plate are provided with an insert or a receptacle at the lower part thereof, and are detachably attached to and attached to the fixture or the insert provided at the center of the fixed plate. The insertion tool and the receiving tool may have a structure in which the cutting machine guide or the hot plate is immovably fixed to the fixing plate and can be attached / detached. An insertion portion that fits into the receiving portion and that is designed not to be disengaged with a knock pin or the like after fitting is suitably used.
[0020]
The method of moving the clamp placed on the clamp base of the present invention is not particularly limited as long as it can move so that the tube axis does not shift in the tube axis direction of the tube held by the clamp. Usually, when pressing and joining the fused pipe end faces, a sufficient pressure is required and the work must be done quickly. Or the normal method by the actuator act | operated by compressed air etc. are applied suitably. Note that the moving device may be fixedly attached to the clamp base or may be detachably attached.
[0021]
(Function)
In the first aspect of the invention, the pair of clamps are respectively attached to the clamp bases, and the tube bases bend up and down at an angle formed by the tube bases of the pipes gripped by the clamps. al is in can be changed as the tube axes angle formed are disposed opposite the tube, and is connected so as to be fixed to the angle, second-street its angle of intersection of the tube axis A pipe cutting machine is provided to cut the end of each pipe on a plane including the dividing line or a plane parallel to the plane, and the pipe cutting surface is replaced with a hot plate to heat and melt the pipe cutting surface. Since it is a pipe fusion splicing machine in which the hot plate is removed and the melted pipe end faces are butted and joined, the pipes can be butt welded even at a point where the inclination angle changes on an inclined ground.
[0022]
Further , the pair of clamp bases are connected by a connecting shaft so as to be rotatable in the tube axis direction of the pipe held by the respective clamps, and holes are equidistant from the connecting shaft on the side surfaces of the respective bases. The fixing pins are inserted into the through holes of the fixing plate provided with the through holes at both ends, and the fixing pins are inserted into the holes formed at the same distance from the inner connecting shafts of the holes. The angle formed by the table is fixed at a predetermined angle. If the angle formed by the clamp base is a predetermined angle, the angle is fixed by a fixing plate, and there is no fear that the angle will change in the subsequent work.
[0024]
In the invention of claim 2, wherein a pair of the cut surface guide is detachably fixed to the auxiliary fixing jig provided on the fixing plate, the through-hole該補aid fixture is provided at both ends of the fixing plate It is attached at a right angle from the fixture at a position equidistant from the fixture. The fixed plate and a pair of clamp base, so constitute a isosceles triangle having a base fixed plate and equilateral clamp base, the direction of the auxiliary fixture has connecting shaft of the clamp base from the bottom center It will be on the plane that passes through. Therefore, the intersection of the tube axis of the tube between the cut surface to be cut by the cutting blade held by the pair of clamp moving along one of the cut surface guide of the pair of cut surfaces guide mounted on auxiliary fixture , And this plane is one half of the angle between the clamp bases.
[0025]
In addition, since the other cut surface guide is on a plane parallel to the cut surface, the cut surfaces are cut surfaces that are in close contact with each other with no gaps at the intersections of the respective tube axes.
[0026]
In the invention of claim 3, wherein, provided in the fixed plate auxiliary fixture is pointing instrument or receptacle, removably insert receiving the cut surface guide or receptacle provided on the hot plate or insert member Since both sides of the hot plate are mounted as parallel heat generation surfaces and at least one of the heat generation surfaces is flush with the cutting surface, the end faces of the cut tubes are abutted by moving the clamps Even in such a case, the cutting guide and the hot plate can be easily replaced.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Next, a pipe fusion splicer of the present invention and a method of connecting thermoplastic synthetic resin pipes using the same will be described in detail with reference to the drawings.
[0029]
FIG. 1 is an explanatory external view of an assembly showing an example of a pipe fusion splicer of the present invention. However, the cut surface guide or the hot plate is not shown. A fixed-side clamp base 1 to which a fixed-side clamp 11 that holds a connected pipe is attached and a moving-side clamp base 2 to which a moving-side clamp 21 that holds a connecting pipe is attached are one end of each base. A connecting pin is inserted into the connecting shaft holes 12 and 22 provided in the upper and lower ends of the connecting shaft holes 12 and 22 so as to be rotatable.
[0030]
The angle formed between the fixed side base 1 and the movable side base 2 is the same as the tube axis angle of the tube held by each clamp, and the fixed plates 3 are provided at both ends of the fixed plate 3. A knock pin is inserted into the fixing holes 31 and 31 ′, and the knock pin is inserted and fixed in a positioning hole formed in the side surface of each of the bases 1 and 2.
[0031]
FIG. 2 is an example of a fixed side clamp, (a) is a side sectional view thereof, and (b) is a front external view. The fixed side clamp 11 is fixed on a fixed side clamp base 1 made of metal such as aluminum via a clamp receiver 111. The fixed-side clamp 11 is made of a metal cylinder divided into two in the axial direction, one edge of which is connected by a hinge 113, and the other edges are fastened by a bolt and a nut 112 to grip the connected pipe. Further, the fixed-side clamp base 11 is provided with a connecting shaft hole 12 at one end, and a plurality of positioning holes 13 are opened at a predetermined distance from the connecting shaft hole 12.
[0032]
FIG. 3 is a side external view of an example of the moving side clamp. The moving side clamp 21 is fixed on the moving side clamp base 2 made of metal such as aluminum via a clamp receiver 211. The fixed-side clamp 21 is a metal cylindrical body divided into two in the axial direction, one edge of which is connected by a hinge 213, and the other edges are fastened by bolts and nuts to grip the connecting pipe. Further, the moving side clamp base 21 is provided with a connecting shaft hole 22 at one end, and a plurality of positioning holes 23 are opened at a predetermined distance from the connecting shaft hole 22, and each positioning hole 23 is positioned. The opening positions of the holes are opened at the same distance as the distance from the connecting shaft hole 12 of the positioning hole 13 formed in the fixed-side clamp base 1.
[0033]
A clamp moving device 24 is fixed to the moving dump base 21 and is connected to a clamp receiver 211 by a rod 242. The clamp receiver 211 can be moved along a guide 241 provided on the clamp base 21 and can be moved by a clamp moving device.
[0034]
The clamp moving device 24 may be any type of actuator such as an actuator using a pressure fluid in addition to a motor. However, since the clamp moving device 24 is small, has a high operation speed, and easily obtains a high torque, it is generally a general hydraulic type. Alternatively, a compressed air actuator may be used. Further, the pressurization of the hydraulic oil may be an electric pump or a manual pump, and in the case of compressed air, it may be appropriately selected and selected according to the situation of the piping laying site such as a compressor.
[0035]
4A and 4B are examples of the fixing plate, FIG. 4A is a side external view thereof, and FIG. 4B is a front external view thereof. Fixing holes 31 and 31 ′ inserted into positioning holes 13 or 23 provided in the fixed clamp base 1 and the movable clamp base 2 are provided at both ends of the metal fixed plate 3 such as aluminum. It has been. The upper surface of the fixed plate 3, such as aluminum metal auxiliary fixture 32 is fixed, the cut surface guide or hot plate which is detachably mounted at a fixed insert receptacle, respectively.
[0036]
FIG. 5 is an example of a cut surface guide, (a) is a front external view thereof, and (b) is a side external view. The cutting surface guide 4 made of metal such as aluminum has a guide groove 41 that guides the cutting blade of the cutting machine at the upper part and a receiving tool 42 at the lower part. The guide groove 41 may be at least one groove, but may be provided with two parallel grooves 411 and 412 as in this example. Incidentally, those insert receptacle 42 described in the present embodiment is a ridge-like member protruding from the double cross shape, but has become those fitted to the auxiliary fixing jig fixtures, limited to this Of course not.
[0037]
Cutting surface guide 4, when the cut surface guide 4 is mounted on the auxiliary fixture, one of the groove surface of at least the guide groove 41, the connecting shaft of the clamp base 1 and the mobile clamp base 2 fixed Including guide holes 31 and 31 ′ provided at both ends of the plate, and the guide groove position so as to be a plane perpendicular to the tube axis of the pipe to be connected or the connecting pipe when viewed from above. The inclination of the cut surface is determined.
[0038]
Although the heat plate 5 is not specifically illustrated and described, the heat generating wire is sandwiched between aluminum flat plates to form a heat generating surface, and both heat generating surface outer surfaces are coated with a fluorine-based synthetic resin. A structural receptacle is provided. The heat plate is also, when mounted on the auxiliary fixture, the heat generating surface of the fixed clamp base side is is defined as the slope of the position and the heat generating surface of the heat plate to match the cut surface .
[0039]
The receiving structure between the fixing plate and the cutting guide or the hot plate is not particularly limited as long as the position and inclination of the cutting surface can be fixed as prescribed, and the cutting guide and the hot plate can be detached from each other. As an example, a receiving structure as shown in FIG. 6 may be used. The holder 42 provided at the lower part of the clamp bases 1 and 2 or the hot plate 5 is composed of an axial hook-like body 422 and a hook-like body 421 perpendicular thereto. The auxiliary fixing jig 32 is fitted into the axial receiving groove 322 and the receiving groove 321 perpendicular to the axial receiving groove 322 so that it does not move back and forth and right and left. In addition, although not shown in the figure, a pin, a hook, or the like for preventing a disengagement by any chance may be used in combination.
[0040]
Next, the connection method of the polyethylene pipe laid and installed on the sloping ground using this pipe fusion splicer will be described. First, as a first procedure (FIG. 7), on a sloping ground, the fixed-side clamp base 1 and the movable-side clamp base 2 are connected to the connection shaft holes 12 and 22 by inserting connection pins into the fixed-side clamp. It arrange | positions in the lower part of a to-be-connected pipe along the direction of piping so that the base 1 may become a to-be-connected pipe side.
[0041]
Next, as a second procedure (FIG. 8), the angle of the moving clamp base 2 is adjusted along the tube axis direction of the connecting pipe or the slope of the inclined ground, and the knock pins 31 and 31 ′ at both ends of the fixing plate 3 are knocked. The fixing hole (for example, the equidistant from the connecting shaft) of the position fixing hole 13 opened in the side surface of the fixed side clamp base 1 and the position fixing hole 23 opened in the side surface of the moving side clamp base 2 131 and 231; 132 and 232; 133 and 233). By doing so, the triangle formed by the connecting shaft and the two fixing holes becomes an isosceles triangle having the connecting shaft as a vertex. Thus the auxiliary fixture 32 of the fixed fixing plate, slide a pointing receptacle 42 of the cut surface guide 4, the guide groove 411 from the midpoint of the fixing plate 3 is a base of the isosceles triangle It includes a straight line connecting the connecting axes that are the vertices, and is placed on a plane perpendicular to the tube axis as viewed from above.
[0042]
Subsequently, as a third procedure (FIG. 9), the fixed end clamp 11 grips the pipe end of the pipe P1 to be connected, and along the guide groove 411 of the cutting surface guide 4, an electrically driven cutting machine (not shown). ) And cut the end of the tube.
[0043]
When the pipe end of the pipe to be connected P1 is cut, as a fourth procedure (FIG. 10), the pipe end of the connection pipe P2 is held by the moving side clamp 21 and is electrically driven along the guide groove 412 of the cut surface guide 4. The tube end is cut by applying a cutting blade of a reciprocating cutting machine (not shown). At this time, since the guide groove 412 is parallel to the guide groove 411, the cut surface has the same shape as the cut surface of the pipe to be connected, and the tube axes intersect within the cut surface of the connection pipe P1. become.
[0044]
When the pipe ends of both the pipe to be connected P1 and the pipe to be connected P2 are cut, the cut surface is smoothed as the fifth procedure (FIG. 11). This procedure is not necessarily a necessary procedure as long as the cut surface is cut smoothly. Further, as an example of the chamfering machine 6 used for smoothing, an ordinary rotary plane type can be suitably used.
[0045]
As a sixth procedure (FIG. 12), the cutting guide 4 is removed, the hot plate 5 is mounted, the moving side clamp base 2 is moved to the hot plate 5 side by the clamp moving device 24, and the hot plate 5 generates heat on the cut surface. The surfaces are brought into close contact with each other to generate heat, and the cut surface is melted. Since the cut surfaces of the pipes P1 and P2 that are in close contact with the heat generating surface are parallel and smooth, the circular or elliptical contact surfaces are evenly melted over the entire surface.
[0046]
When the pipe end surfaces of the polyethylene pipes P1 and P2 are melted, as the seventh procedure (FIG. 13), the hot plate 5 is removed, and the moving side clamp base 2 is immediately pushed to the fixed side clamp base 1 side by the clamp moving device 24. The pipe end of the connected pipe P1 that is gripped and melted by the moving side clamp 21 of the fixed side clamp 11 is tightly connected to the pipe end of the connecting pipe P2.
[0047]
After cooling, the fixed side clamp 11 and the moving side clamp 21 are removed, the knock pin is pulled out, the fixing plate 3 is removed, the connecting pin is pulled out, the fixed side clamp base 1 and the moving side clamp base 2 are removed, and the lower part of the pipe line After removing all the members of the pipe fusion splicer from the pipe, the pipes are stabilized by earthing or sandbags under the pipes, and the pipe laying is completed. In addition, after the fusion splicing, if trouble occurs in the fluid flow due to the bead generated in the connection portion in the pipe line, for example, the method known in Japanese Patent Laid-Open No. 5-329934 can be used. The surface may be smoothed.
[0048]
【The invention's effect】
As described above, the pipe fusion splicer of the present invention is capable of butt connection by melting the pipe ends of polyethylene pipes arranged with the pipe axis bent up and down with respect to the ground surface, By using this pipe fusion splicer, for example, it is possible to butt polyethylene pipes at the pipe pipe laying site even when laying pipe lines where the pipe axis bends up and down with respect to the ground surface in steep slopes. It is.
[Brief description of the drawings]
FIG. 1 is an explanatory external view of an assembly showing an example of a pipe fusion splicer of the present invention. However, the cut surface guide or the hot plate is not shown.
FIG. 2 is an example of a fixed side clamp, (a) is a front sectional view thereof, and (b) is a side external view.
FIG. 3 is a side external view of an example of a moving side clamp.
FIG. 4 is an example of a fixed plate, (a) is a side external view thereof, and (b) is a front external view.
FIG. 5 is an example of a cut surface guide, (a) is a side external view thereof, and (b) is a front external view.
FIG. 6 is an explanatory view showing an example of a receiving structure between a clamp base or a hot plate and a fixed plate.
FIG. 7 is an explanatory diagram showing a first procedure of a pipe connection method using the pipe fusion splicer of the present invention.
FIG. 8 is an explanatory diagram showing a second procedure of a pipe connection method using the pipe fusion splicer of the present invention.
FIG. 9 is an explanatory diagram showing a third procedure of a pipe connection method using the pipe fusion splicer of the present invention.
FIG. 10 is an explanatory diagram showing a fourth procedure of a pipe connection method using the pipe fusion splicer of the present invention.
FIG. 11 is an explanatory diagram showing a fifth procedure of a pipe connection method using the pipe fusion splicer of the present invention.
FIG. 12 is an explanatory diagram showing a sixth procedure of a pipe connection method using the pipe fusion splicer of the present invention.
FIG. 13 is an explanatory diagram showing a seventh procedure of a pipe connection method using the pipe fusion splicer of the present invention.
[Explanation of symbols]
1 the fixed clamp base 11 fixed-side clamp 12 connection shaft hole 13 positioning holes 2 movable clamp base 21 moves side clamp 22 connection shaft hole 23 positioning hole 24 mobile device 3 fixed plate 31 fixing hole 32 auxiliary fixture 4 Cutting surface guide 41 Guide groove 42 Insertion tool 5 Hot plate 6 Chamfering machine P1 Connected pipe P2 Connecting pipe

Claims (3)

A pair of clamps hold the pipe ends of the thermoplastic synthetic resin pipes facing each other, cut the end faces of each pipe, heat and melt the cut faces with a hot plate, and fuse the cut cut faces together. A pipe fusion splicer,
A pair of clamps are attached to each clamp base,
The angle at which the tube axis is formed in the tube between the clamp base together are gripped in each clamp, the tube axes is coincident with the tube axis between the angle of the disposed bent et al are in opposite upper and lower tubes may be changed, and are connected so as to be fixed to the angle,
A pair of clamp bases are connected by a connecting shaft so as to be rotatable in the tube axis direction of the pipe held by each clamp, and holes are provided at equal intervals from the connecting shaft on the side surfaces of each base. The fixing pins are inserted into the through holes of the fixing plate provided with the through holes at both ends, and the fixing pins are inserted into the holes formed at the same distance from the inner connecting shafts of the holes. The angle formed is fixed at a predetermined angle,
A pipe cutting machine is provided that cuts each pipe end on a plane that includes the bisector of the angle that passes through the intersection of the pipe axes , or a plane that is parallel to the plane,
Replace the tube cutting machine and hot plate to heat and melt the tube cutting surface,
A pipe fusion splicer that removes the hot plate immediately after melting and abuts the melted pipe end faces together for fusion bonding. A pair of cut surface guides are detachably fixed to an auxiliary fixing jig provided on the fixing plate, and the auxiliary fixing jig is perpendicular to the fixing jig at positions equidistant from the through holes provided at both ends of the fixing plate. Attached to the
The cutting surface cut by the cutting blade moving along one cutting surface guide of the pair of cutting surface guides is on a plane passing through the intersection of the tube axes of the tubes held by the pair of clamps, and the other cutting The pipe fusion splicer according to claim 1, wherein the surface guide is on a plane parallel to the cut surface . An auxiliary fixing jig provided on the fixing plate is an insertion tool or a receiving tool,
It is received and fixed removably with a holder or insert provided on the cutting surface guide or hot plate,
Both sides of the hot plate are parallel heat generation surfaces,
The pipe fusion splicer according to claim 1 or 2, wherein at least one of the heat generating surfaces is flush with the cut surface .

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