JPH0734281U - Pipe joining device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pipe joining device capable of performing a joining operation even when a straight portion of a pipe to be joined on a side of an opening is short. [Structure] An existing pipe 3 having a receiving port 5 formed at an end thereof is provided with a joining spacer 22 which can be fitted into and removed from above, and a neck 5a of the receiving port 5 of the existing pipe 3 is inserted through the joining spacer 22. A plurality of eccentric clamp rollers are fitted on the saddle member 7 from above to prevent the saddle member 7 from slipping off, and at the position on the outer peripheral portion of the insertion port 6 of the new pipe 4 which is closer to the end side by the joining spacer 22. The insertion port holding member 8 having 16 is fitted from above. The holding and joining cylinder device 9 connected to the saddle member 7 is contracted and driven, and the eccentric clamp roller 16 is rotated to press the clamp surface against the outer peripheral surface of the insertion opening 6 to fix the insertion opening holding member 8 to the insertion opening. Then, the insertion opening 6 is moved to the receiving opening 5 side and inserted into the receiving opening 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joining device for joining pipes laid in a groove cut from the surface of the earth.

[0002]

[Prior art]

 When laying a pipeline in a groove cut from the surface of the earth, in the past, an operator entered the groove and placed the wire rope on both pipes to be joined, and operated this wire rope using a lever block or the like. , I often work by pulling both pipes together. However, the work in such a conventional open-cut groove involves a risk of the groove collapsing, the working environment is extremely bad, and moreover, skill is often required for the work.

As a pipe joining device capable of solving such a problem, structures as shown in FIGS. 4 to 9 are conceivable. In FIG. 4, a pipe 3 has already been laid in the excavation groove 1 formed to a predetermined depth from the ground surface 2, and a new pipe 4 is joined to the existing pipe 3. The existing pipe 3 is buried in the excavation groove 1 so that the receiving port 5 at one end is exposed, and the receiving port 5 is connected to the insertion port 6 of the new pipe 4. The saddle member 7 is held on the neck portion 5a of the receiving opening 5, and the insertion opening holding member 8 is held on the outer peripheral portion of the insertion opening 6, and the holding and joining means is provided between the saddle member 7 and the insertion opening holding member 8. A pair of hydraulic holding and joining cylinder devices 9 are disposed.

As shown in FIGS. 5 to 7, the insertion port holding member 8 includes a half ring body 11 that can be freely inserted into and removed from the outer peripheral portion of the insertion port 6 of the new pipe 4, and both sides of the half ring body 11. And a pair of left and right holding roller portions 12 provided at positions opposite to each other with the tube axis O of the new pipe 4 interposed therebetween, and the inner surface of the half ring body 11 contacts the outer peripheral surface of the insertion opening 6. Attach the seats 13 at 90 degree intervals in 3 places.

As shown in FIG. 8, the holding roller portion 12 is configured by attaching an eccentric clamp roller 16 to a pair of roller brackets 14 attached to the half ring body 11 via a tangential support shaft 15. The eccentric clamp roller 16 forms a drum-shaped clamp surface 16a along the outer peripheral surface of the insertion opening 6 over about a half circumference, and the opposite side of the clamp surface 16a is pin-connected to the piston rod 9a of the holding and joining cylinder device 9. Then, a clamp lever 17 for rotating the eccentric clamp roller 16 around the supporting shaft 15 is provided in a protruding manner. The clamp surface 16a is mounted such that its center O ₁ is eccentric to the axis O ₂ of the support shaft 15 by a distance L. Therefore, by rotating the eccentric clamp roller 16 in the direction of arrow A via the clamp lever 17, the clamp surface 16a is brought into pressure contact with the outer peripheral surface of the insertion opening 6, and the insertion opening holding member 8 is attached to the outer peripheral portion of the insertion opening 6. It can be fixed.

As shown in FIG. 9, the saddle member 7 is formed in a semi-ring shape that can be inserted into and removed from the neck 5a of the receiving port 5 of the existing pipe 3 from above, and its inner diameter is smaller than the outer diameter of the receiving port 5. It is formed so that, in the fitted state, the movement toward the receiving port 5 side (outward in the axial center direction) is restricted so as to be prevented from coming off. A cylinder bracket for forming a taper-shaped guide surface 18 on the inner surface of the saddle member 7 for guiding the fitting to the neck portion 5a, and for supporting the main body 9b of the holding and joining cylinder device 9 through a pin. 19 is provided.

When the new pipe 4 is joined to the existing pipe 3 by using this pipe joining apparatus, the receiving port 5 of the existing pipe 3 is the same as the insertion port 6 of the new pipe 4 suspended by a crane or the like. The saddle member 7 and the insertion hole holding member 8 are suspended from the ground surface 2 together with the holding and joining cylinder device 9 in the excavation groove 1 so that the saddle member 7 is located at the neck 5a of the receiving port 5. And the insertion hole holding member 8 is fitted to the outer peripheral portion of the insertion hole 6 from above. At this time, the holding and joining cylinder device 9 is in the extended state, and the eccentric clamp roller 16 is in the unclamped state in which the clamp lever 17 is shown by the solid line in FIG.

Next, when the holding and joining cylinder device 9 is contracted synchronously, the eccentric clamp roller 16 is rotated in the direction of arrow A via the clamp lever 17, and the clamp surface 16 a is brought to the outer peripheral surface of the insertion opening 6. The insertion port holding member 8 is pressed and firmly fixed to the outer peripheral portion of the insertion port 6.

Further, when a constant tightening force is applied, the holding and joining cylinder device 9 is contracted in a synchronized manner, the new pipe 4 is moved to the existing pipe 3 side, and the insertion port 6 is inserted into the receiving port 5. The insertion port 6 of the new pipe 4 is fitted into the receiving port 5 of No. 3 and is stopped at a constant swallowing amount. As a result, the joining of the tubes 3 and 4 is completed. It should be noted that necessary members such as a sealing material are previously housed inside the receiving port 5.

After the joining is completed, the holding and joining cylinder device 9 is slightly extended to rotate the eccentric clamp roller 16 in the direction of the arrow B to release the clamp and loosen the saddle member 7. Then, the saddle member 7 and the insertion port holding member 8 are detached from the pipes 3 and 4 together with the holding and adhering cylinder device 9 and are lifted from the excavation groove 1 and carried out.

According to this pipe joining device, the joining device can be operated from outside the digging groove 1 to perform the joining work between the pipes 3 and 4, so that even an unskilled person can easily perform the joining work. it can. Moreover, only by driving the pair of holding and joining cylinder devices 9, the insertion holding member 8 can be fixed to the outer peripheral portion of the insertion opening 6, and the new pipe 4 can be moved and inserted to the existing pipe 3 side. Since the pipes 3 and 4 can be joined to each other, the device itself can be simplified and made lighter in weight as compared to the case where both the clamp device and the joining device are provided in the pipe joining device, and the transporting and It can be handled easily.

[0012]

[Problems to be solved by the device]

 However, the pipe joining device having the above-mentioned configuration can join the pipes 3 and 4 without any trouble when the new pipe 4 in which the insertion port 6 is formed is a straight pipe, but the new installation in which the insertion port 6 is formed is possible. When the pipe 4 is a deformed pipe, there is a problem that the pipe joining device cannot be used. That is, in the above-described conventional pipe joining device, the holding joining cylinder device 9 requires a predetermined stroke, and the insertion port holding member 8 is fitted at a position separated from the end of the insertion port 6 by the distance L1 when mounted. Since the structure is such that the linear portion on the insertion side (hereinafter referred to as the straight portion) has a dimension smaller than the distance L1, the insertion port holding member 8 can be attached to the insertion port 6. No, and as a result, the pipe connecting device cannot be used.

The present invention solves the above problems, and an object of the present invention is to provide a pipe joining device capable of performing a joining operation even when the dimension of the straight portion on the insertion side of the pipes to be joined is short. It is a sipping thing.

[0014]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is a pipe joining device for joining pipes laid in a groove cut from the surface of the earth, and one pipe having a socket formed at its end can be fitted into and removed from above. And the saddle member that is prevented from coming off on the receiving side and the outer peripheral part of the insertion port formed at the end of the other pipe to be joined can be freely inserted and removed from above, and the pipe can be rotated around the tangential axis of the pipe. An insertion port holding member having a plurality of eccentric clamp rollers rotatably attached, one end of which is connected to the saddle member and the other end of which is connected to a rotary lever of the eccentric clamp roller, so that eccentricity is generated during contraction driving. Holding and joining means for pressing the clamp roller to the outer peripheral surface of the insertion opening, and a pipe having a receiving opening formed at an end thereof can be freely inserted into and removed from the pipe and interposed between a neck portion of the receiving opening and a saddle member. And a spacer for joining.

[0015]

[Action]

 In the above structure, first, the joining spacer is fitted from above into the vicinity of the receiving opening of the pipe having the receiving opening at the end, and the saddle member is fitted to the adjacent position of the joining spacer in this pipe. Then, the joining spacer is interposed between the neck portion of the receptacle and the saddle member. As a result, the position of the outer peripheral portion of the insertion opening where the insertion opening holding member is fitted can be moved closer to the end portion side of the pipe where the insertion opening is formed by the amount of the joining spacer than in the conventional case. Even when joining an insertion port of a deformed pipe having a short dimension, the insertion port holding member can be fitted to the outer peripheral portion of the insertion port. After that, by driving the holding and joining means to contract, the eccentric clamp rollers are pressed against the outer peripheral surface of the insertion opening, the insertion opening holding member is fixed to the outer peripheral surface of the insertion opening, and the holding and joining means is driven to contract. As a result, the other tube can be moved through the insertion port holding member and the insertion port can be fitted into the receiving port.

[0016]

【Example】

 An embodiment of the pipe joining device according to the present invention will be described below with reference to the drawings. It should be noted that those having the same functions as those of the conventional pipe joining device are designated by the same reference numerals, and their description will be omitted.

In FIG. 1 and FIG. 2, reference numeral 21 denotes a new pipe made of a deformed pipe. The center portion of the pipe in the axial direction is curved and only the both ends are straight portions, and the insertion port 6 is formed at one end. ing. Reference numeral 22 is a joining spacer that can be inserted into and removed from the existing pipe 3 having the receiving port 5 formed at the end thereof from above and is interposed between the neck portion 5a of the receiving port 5 and the saddle member 7. As shown in FIG. 3, the connecting spacer 22 is a pair of half ring portions 22a that can be fitted into and removed from the outer peripheral portion of the existing pipe 3 from above, and a connecting portion that connects and fixes both end portions of these half ring portions 22a. The arm portion 22b and the half ring portion 22a and the connecting arm portion 22b form a semi-cylindrical frame shape.

When this new pipe joining apparatus is used to join the new pipe 21 made of a deformed pipe to the existing pipe 3, the following procedure is performed. First, the joining spacer 22 is fitted into the existing pipe 3 in the vicinity of the receiving port 5 from above, and the saddle member 7 is fitted into the existing pipe 3 adjacent to the joining spacer 22 from above. . As a result, the joining spacer 22 is interposed between the neck portion 5a of the receiving port 5 and the saddle member 7, and the position of the outer peripheral portion of the insertion port 6 into which the insertion port holding member 8 is fitted is larger than in the conventional case. Is also moved to the end side of the new pipe 21 by the dimension L2 of the joining spacer 22. Therefore, even when the insertion port 6 of the new pipe 21 made of a deformed pipe having a short straight dimension L3 is joined to the receiving port 5 of the existing pipe 3, the insertion port holding member 8 is fitted to the new pipe 21 without any trouble. Can be made.

After that, the holding and joining cylinder device 9 is contracted and driven in the same manner as in the conventional case, whereby the eccentric clamp rollers 16 are pressed against the outer peripheral surface of the insertion opening 6, respectively, and the insertion opening holding member 8 is inserted. It is fixed to the outer peripheral surface of 6. Further, by driving the holding and joining cylinder device 9 to contract, the new pipe 21 is moved from the position shown by the phantom line in FIG. 1 to the position shown by the solid line in FIG. It can be fitted into the receptacle 5 of the existing pipe 3.

In the above embodiment, the case where the new pipe 21 is a deformed pipe having a short straight portion L3 is described, but the present invention is also applied to the joining work of a straight pipe having a particularly short axial dimension. It is possible. Further, since the joining spacer 22 is provided separately from the saddle member 7, it is easy to join the pipes by omitting the joining spacer 22 depending on the type of the pipe to be joined.

[0021]

[Effect of device]

 As described above, according to the present invention, a pipe having a receptacle formed at an end thereof is provided with a joining spacer that can be fitted into and removed from above, and the joining spacer is interposed between the neck of the receptacle and the saddle member. Even if the pipe in which the insertion opening is formed is a deformed pipe with a short straight part, the joining device can be operated to easily join the pipes. You can

[Brief description of drawings]

FIG. 1 is a plan view of a pipe joining apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of the pipe joining device.

FIG. 3 is a perspective view of a joining spacer of the pipe joining apparatus.

FIG. 4 is an overall side view showing a pipe joining operation by a conventional pipe joining device.

FIG. 5 is a plan view of the conventional pipe joining apparatus.

FIG. 6 is a side view of the conventional pipe joining apparatus.

7 is a cross-sectional view taken along line I-I in FIG.

FIG. 8 is a side view showing an eccentric roller of the pipe joining device.

9 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 3 Existing Pipe 5 Receptacle 5a Neck 6 Insert 7 Saddle Member 8 Insert Holding Member 9 Holding and Joining Cylinder Device (Joint Holding Means) 16 Eccentric Clamp Roller 17 Clamp Lever 21 New Tube 22 Joining Spacer

Claims (1)

[Scope of utility model registration request] 1. A pipe joining device for joining pipes laid in a groove cut from the surface of the earth, the pipe joining device having one end formed with a receiving port and capable of being fitted and removed from above. The saddle member that is retained on the mouth side and the outer peripheral portion of the insertion opening formed at the end of the other pipe to be joined can be freely inserted into and removed from above, and can be rotated around the tangential axis of the pipe. An insertion opening holding member having a plurality of attached eccentric clamp rollers, one end of which is connected to the saddle member and the other end of which is connected to a rotating lever of the eccentric clamp roller, so that the eccentric clamp roller is inserted during contraction driving. Holding joining means for making pressure contact with the outer peripheral surface of the above, and a joining spacer that can be inserted into and removed from a pipe having a receptacle formed at the end thereof from above and is interposed between the neck portion of the receptacle and the saddle member. A pipe joining device characterized in that