JP3124207B2 - Mortar filling equipment for pipe joints of internal surface joining type - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar filling apparatus for an inner surface joint type pipe joint.

[0002]

2. Description of the Related Art As one type of a pipe joint, a sealing material interposed between an inner peripheral surface of a receiving port and an outer peripheral surface of an insertion port is screwed out from a pressing ring disposed in the receiving port. There is an inner surface joint type pipe joint which is compressed by a bolt which presses a rear end surface of a receiving port.

FIG. 4 shows an example of such an inner surface joint type pipe joint. Here, a socket 2 is formed at an end of one of the cast iron pipes 1 to be joined to each other, and an insertion port 4 inserted into the socket 2 is formed at an end of the other pipe 3. ing. An annular concave portion 5 is formed on the inner periphery of the receiving port 2, and a sealing material press contact surface 6 whose inner diameter gradually decreases toward the opening end is formed on the receiving port opening end side of the concave portion 5. I have. The concave portion 5 includes a rubber sealing member 7 disposed between the sealing member pressing surface 6 and the outer peripheral surface of the insertion opening 4, a split ring 8 divided into a plurality of pieces along the circumferential direction, and a pressing ring 9. Is arranged. A bolt 10 in the pipe axis direction can be screwed out from the press ring 9, and the head of the bolt 10 and the rear end face 11 of the socket 2 are formed.
A connecting rod 12 is disposed between the two.

[0004] Such bolts 11 and connecting rods
A plurality of bolts 12 are arranged in the circumferential direction, and the bolts 11 are screwed out from the pressing ring 9, and the connecting rod 12 hits the rear end face 11, whereby the sealing material 7 is compressed via the split ring 8, whereby the sealing material 7 is compressed. A predetermined sealing function is exhibited. Pressing wheel 9
Is formed with a notch 13 for avoiding contact with the front end of the insertion opening 4. Further, a projection 14 is formed on the outer surface of the insertion opening 4. When the projection 14 hits the end face of the receiving opening 2, the insertion opening 4 is too deep into the receiving opening 2, and the tip of the insertion opening 4 is pressed. 9 is prevented.

[0005] In the pipe joint of the inner surface joining type having such a configuration, when the bolt 10 is screwed out from the pressing ring 9 and the sealing material 7 is compressed to exert a predetermined sealing function, the end face of the pressing ring 9 is formed. An annular space 15 is formed in the circumferential direction between the inner space 11 and the inner end surface 11 of the socket 2. This space 15 is located radially outside the inner peripheral surface of the pipe, and therefore causes stagnation when water flows through the pipe. Therefore, after the sealing material 7 is compressed, the space 15 is filled with mortar 16 to prevent such stagnation.

[0006]

However, in the prior art, such mortar filling work has been carried out by workers, and the work is difficult, so that only skilled workers can fill the mortar. There is a problem that the number of skilled workers tends to decrease.

Accordingly, an object of the present invention is to solve such a problem and allow anyone to easily fill the mortar.

[0008]

In order to achieve the above object, the present invention provides a sealing device interposed between an inner peripheral surface of a receiving port and an outer peripheral surface of an insertion port, and a press ring disposed in the receiving port. And, in an inner surface joint type pipe joint which is screwed out from the pressing ring and pressed by a bolt for pressing a rear end surface of the receiving port, the inner side surface of the pressing ring is closer to the inner end surface than the inner end surface of the receiving port. An annular elastic body disposed up to the inner peripheral surface of the pipe, a contact plate disposed on the inner peripheral side of the elastic member, and a penetrating hole disposed at one end of the elastic plate; And the other end located on the inner peripheral side of the backing plate is tightened with a nut, so that one end of the elastic body is pressed against the inner circumferential surface of the pressing ring through the backing plate to make close contact therewith. Bolt and penetrate the backing plate at a position further away from the elastic body than this tightening bolt While being screwed together in a state, the tip portion screwed out of the backing plate presses the inner surface of the insertion opening, and the other end side of the elastic body passes through the backing plate by the pressing reaction force to the inner periphery of the tube. And an adjustment bolt which is pressed against the surface and brought into close contact therewith.

[0009]

According to such a configuration, by operating the tightening bolt, one end of the elastic body is pressed against the inner peripheral surface of the pressing wheel and is brought into close contact therewith. Also, when the inner surface of the insertion hole is pressed by operating the adjustment bolt, the contact plate receives a pressing reaction force from the inner surface of the insertion hole, and the fastening bolt becomes a fulcrum. Is pressed against and adhered to the inner peripheral surface of the pipe on the receiving port side. Therefore, a space surrounded by the elastic body, the pressing wheel, and the inner end surface of the receiving port is formed. Therefore, by supplying the mortar to this space by an appropriate means such as a pump, the mortar can be easily filled by anyone without the necessity of a maintenance operation.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 3 by assigning the same reference numerals to the same members as those shown in FIG. Here, reference numeral 21 denotes a mortar filling device according to the present invention.
23 are arranged concentrically.

The elastic body 22 is formed of a flat annular sponge rubber, and is disposed from the inner peripheral surface of the press ring 9 to the inner peripheral surface 25 of the pipe at a position deeper than the inner end surface 11 of the socket 2. I have. A portion 27 corresponding to the inner peripheral surface of the pressing wheel 9 and a portion 28 corresponding to the inner peripheral surface 25 of the pipe 1 are provided on the outer peripheral surface of the elastic body 22.
Are formed, and a tapered surface 29 is formed between the two portions 27 and 28. Also, on the outer peripheral surface of the elastic body 22,
A groove 30 corresponding to the inner peripheral surface of the press ring 9 and a step 31 corresponding to the inner peripheral surface 25 of the pipe 1 are formed. Each of the groove 30 and the step 31 has a pair of O-rings 32. Is inlaid. Further, the elastic body 22 is formed with a protrusion 33 that engages with the notch 13 of the pressing wheel 9.

The backing plate 23 is formed of a plate material fitted into the inner periphery of the elastic body 22, and is divided into a plurality of pieces along the circumferential direction as shown in the figure, so that a plurality of arc-shaped divided pieces 34 are formed.
Is provided. In addition, the contact plate 23 is
It has a protruding portion 35 protruding toward the insertion opening 4 side.

A threaded hole 36 in the tube axis direction for screwing the bolt 10 is formed in the press ring 9 so as to penetrate the notch 13. A through-hole 37 corresponding to the screw hole 36 is formed in a portion of the backing plate 23 at a position corresponding to the notch 13 of the pressing wheel 9. Further, an L-shaped tightening bolt 51 passing through the through hole 37 is provided in a portion of the notch 13 between the distal end surface of the insertion opening 4 and the pressing ring 9, and a screw is formed in the tightening bolt 51. The other end 52 is inserted into the screw hole 36 to engage with the screw hole 36 in the pipe diameter direction. The other end of the tightening bolt 51
An external thread is formed on 53, and the other end 53 is a through hole.
37, the nut 54 is screwed into a portion located on the inner peripheral side of the backing plate 23 and tightened, so that the portion 27 on one end side of the elastic body 22 through the backing plate 23 is It is pressed against and tightly attached to the inner peripheral surface.

A pair of pipe diameter adjusting bolts 55 are screwed into the protruding portions 35 of the respective divided pieces 34 of the backing plate 23 from the inner surface side in a state of being penetrated at a distance in the circumferential direction of the divided pieces 34. ing. That is, the distal end portion 56 of the adjusting bolt 55 is screwed outward from the backing plate 23 in the pipe radial direction at a position farther from the elastic body 22 than the tightening bolt 51, and presses the inner surface of the insertion port 4. ing. Therefore, the pressing reaction force is applied to the backing plate 23, and the pressing reaction force is applied to the elastic body via the backing plate 23 with the fastening bolt 51 as a fulcrum.
A portion 28 at the other end of the tube 22 is pressed against the inner peripheral surface 25 of the tube 1 to be in close contact therewith.

A mortar supply pipe 40 which radially penetrates the elastic plate 22 and the elastic plate 22 from a position on the inner periphery with respect to the elastic plate 23.
And one end of the mortar supply pipe 40 is opened on the outer peripheral surface side of the elastic body 22. The other end of the mortar supply pipe 40 is connected to a mortar pump 41. The mortar supply pipes 40 are provided in a pair at intervals in the circumferential direction, and a valve 42 is provided between the mortar supply pipes 40.
An attached air vent pipe 43 is provided. This air vent pipe
43 also penetrates the elastic body 22 and the backing plate 23, and has one end opening on the outer peripheral surface side of the elastic body 22 and the other end side opening on the inner circumferential surface side of the backing plate 23.

In such a configuration, when the bolts 10 are screwed out from the pressing ring 9 at the time of joining the pipe joints and the compression of the sealing material 7 is completed, the inside of the pipe in the portion where the pressing ring 9 is present is next. The mortar filling device 21 is carried in. And
The projection 33 of the elastic body 22 is engaged with the notch 13 of the pressing wheel 9 to position the elastic body 22 in the tube axis direction, and further, the contact plate 23 is arranged on the inner peripheral side thereof. At this time, one end 52 of the tightening bolt 51 is screwed into the screw hole 36 of the pressing ring 9 in advance.
And the other end 53 is passed through the through-hole 37. Then, the nut 54 is screwed into the other end 53 of each of the tightening bolts 51 and tightened, so that the portion 27 on one end side of the elastic body 22 is pressed against the inner peripheral surface of the pressing ring 9 by the backing plate 23.

Further, the tip 56 of the adjusting bolt 55 is
When the screw is unscrewed from 23 and presses the inner surface of the insertion hole 4, a pressing reaction force is applied to the backing plate 23. The pressing reaction force presses the portion 28 on the other end side of the elastic body 22 against the inner peripheral surface 25 of the tube 1 via the backing plate 23 with the fastening bolt 51 as a fulcrum.

As described above, a portion 27 on one end side of the outer periphery of the elastic body 22 is in close contact with the inner peripheral surface of the press ring 9, and a portion 28 on the other end side is in close contact with the inner peripheral surface 25 of the tube 1. Further, an O-ring 32 is provided between the pressing ring 9 and the elastic body 22 and the inner peripheral surface of the tube 1.
The space between the elastic body 22 and the elastic body 22 is securely sealed, and a space 44 surrounded by the elastic body 22, the pressing ring 9, and the inner end surface 11 of the receiving port 2 is formed.

Therefore, while maintaining this state, the mortar pump 41 is driven to fill the mortar 45 from the mortar supply pipe 40 into the space 44. This mortar 45
The air 46 in the space 44 is discharged to the outside through the air vent pipe 43 arranged at the top of the pipe joint.

When the mortar starts to flow out of the air vent pipe 43, it is determined that the filling of the mortar 44 into the space 44 is almost completed. Therefore, after the valve 42 is closed, the mortar 44 is further supplied for a predetermined time. And deflate enough.

When the filling of the mortar 45 is completed, the mortar is cured, so that the mortar 16 in a hardened state is filled between the pressing wheel 9 and the rear end face 11. Is formed by the tapered surface 29 of the elastic body 22.

Then, the operation of the bolts 51 and 55 causes
23 and the elastic body 22 are removed and transported to the position of another fitting, and thereafter the filling of the fitting is filled with mortar in the same manner.

[0023]

As described above, according to the present invention, by operating the tightening bolt and the adjusting bolt, the elastic body disposed from the inner peripheral surface of the press ring to the inner peripheral surface of the pipe on the receiving port side is formed. , The inner peripheral surface of these push rings and the inner peripheral surface of the pipe on the receiving port side can be easily brought into close contact with each other via the contact plate,
This makes it possible to easily form a space surrounded by the elastic body, the pressing ring, and the inner end face of the receiving port. Therefore, by supplying mortar to this space by an appropriate means, it is necessary to perform a work of manual care. Without this, anyone can easily fill the mortar into the internal joint type pipe joint.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a mortar filling apparatus according to one embodiment of the present invention is mounted on an inner surface joint type pipe joint.

FIG. 2 is a cross-sectional view of a portion shown in FIG.

FIG. 3 is a cross-sectional view of the elastic body in FIG.

FIG. 4 is a longitudinal sectional view of an inner surface joint type pipe joint to which a conventional mortar filling method is applied.

[Explanation of symbols]

 2 Receptacle 4 Insertion hole 9 Press ring 10 Bolt 22 Elastic body 23 Backing plate 25 Inner peripheral surface 51 Tightening bolt 54 Nut 55 Adjusting bolt

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-229589 (JP, A) JP-A-57-179674 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 21/00-21/08 F16L 55/16

Claims (1)

(57) [Claims] 1. A pressing ring disposed in a receiving port and a sealing member interposed between an inner peripheral surface of a receiving port and an outer peripheral surface of an inserting port, and a rear end face of the receiving port screwed out of the pressing ring. An inner joint pipe joint that is compressed by a bolt that presses an annular elastic body disposed from an inner peripheral surface of the pressing ring to an inner peripheral surface of a pipe deeper than a deep end face of the socket. And a backing plate disposed on the inner peripheral side of the elastic body; and a penetrating plate disposed through the backing plate, one end of which is engaged with a screw hole of the pressing ring, and is located on the inner peripheral side of the backing plate. A tightening bolt that presses one end of the elastic body to the inner peripheral surface of the pressing ring through the abutment plate to tighten the other end by tightening the nut, and a position further away from the elastic body than the tightening bolt Screwed into the backing plate with An adjustment bolt that presses the other end of the elastic body against the inner peripheral surface of the tube by pressing the inner end surface of the insertion opening by pressing the inner end surface of the insertion hole by a pressing reaction force, and an adjusting bolt that is in contact with the inner peripheral surface of the tube. A mortar filling device for an inner surface joint type pipe joint, which is provided.