JPH02142995A - Branch saddle - Google Patents

Abstract

PURPOSE:To make it possible to use even for flammable fluid pipeline as well as to improve the extent of sealability between a saddle body and the existing pipeline by preventing a spark at time of pipeline cutting, and attaching a saddle ring and fireproofing packing after surrounding an interconnecting port of the saddle body so as to surround an outer circumferential surface of the pipeline. CONSTITUTION:A saddle body 2 is surrounded by a clamp 4 and tightly attached to a branch position of an existing pipeline 1 with a bolt 6 without stopping a fluid in the pipeline. Next, when a drilling device 10 is driven by dint of explosive power of powder 15, the pipeline 1 is cut off by a cutting edge 12 of a piston body 13, thus a branch hole 37 is formable. Here this piston 13 forms a hard cost of a nickel alloy on its surface, thereby preventing a spark at time of pipe cutting from occurring, so that it is also applicable even for a flammable fluid pipeline. In addition, a saddle ring and fireproofing packing are attached to a semicylindrical surface-form surrounded surface 3 of the saddle body 13 so as to surround an interconnecting port 8, surrounding an outer circumferential surface of the pipeline 1. Accordingly, since the extent of sealability between the saddle body 2 and the existing pipeline 1 is improvable, even such a fluid as high in permeability for gas or the like can be sealed with certainty.

Description

DETAILED DESCRIPTION OF THE INVENTION Purpose of Clarity (Field of Industrial Application) The present invention relates to a branching saddle that can branch piping quickly and reliably without stopping the fluid in the piping line.

(Prior art) Generally, in order to branch a flow path of a pipe, the cut end of the connecting pipe is connected with a T-shaped pipe joint, and another pipe is screwed into the branch joint of this pipe joint. I am trying to connect the piping.

In addition, the present applicant surrounds and fixes a saddle body and a clamp around the outer periphery of a pipe, forms a communication port that communicates with a branch path on the pipe surrounding surface of the saddle body, and connects a branch pipe to this branch path. proposed a branching saddle in which, in this state, the perforation mechanism provided inside the saddle body is forcibly moved in a direction that intersects with the piping, and the piping part located at the communication port is perforated to branch the fluid (Unexamined Japanese Patent Publication No. Publication No. 56-24283, etc.)
.

(Problems to be Solved by the Invention) The conventional T-type pipe joint described above requires branching work such as once stopping the fluid in the piping line, connecting the cut end of the pipe with a pipe joint, and then connecting a branch pipe. This makes the work extremely troublesome and time-consuming.

Therefore, the applicant proposed a bifurcated saddle (Japanese Patent Laid-Open No. 56
-24283 Publication, etc.) can easily perform branching work without stopping the fluid in the piping line, and compared to conventional branching work, it can shorten time and significantly reduce costs, resulting in rationalization and labor savings. Although it has been well received as a product that meets the needs of modern piping work, there have also been requests for improvements in the following areas.

First of all, the branch saddle described above can be applied to flammable fluids such as gas, and even in the case of highly permeable fluids such as gas, it provides a more reliable seal between the saddle body and existing piping. It was to make it a thing.

The present invention was developed as a result of various research in order to meet the above-mentioned requirements, and can be used for piping through which flammable fluids such as gas flow, and can also be used to seal the saddle body and existing piping. The purpose is to further improve the stopping performance.

Means for Solving the Problems In order to achieve the above object, the present invention has a saddle body and a clamp that are surrounded and fixed to the outer periphery of a pipe, and a branch path is formed on the pipe surrounding surface of the saddle body. In a branching saddle that forms a communication port that communicates with the main body of the saddle, and forcibly moves a perforation mechanism provided inside the saddle body in a direction intersecting the piping to perforate a piping portion located at the communication port, the perforation mechanism described above is used. consists of a piston body driven by an appropriate drive source, a cutting edge provided at the tip of the piston body, and a through hole formed in the middle, and further communicates with the semi-cylindrical surrounding surface formed in the saddle body described above. It uses a configuration in which a saddle ring and fireproof packing are attached to surround the mouth.

The above drive source is preferably driven by the explosive force of gunpowder provided at the end of the piston body.

In addition, a hard coating of nickel alloy is formed on the surface of the piston body, a hard coating of nickel alloy is formed on the surface of the piston body, and the structure is composited with resin, or a coating of copper is formed on the surface of the piston body. - Forming a hard coating of beryllium alloy, and making the cutting edge of the piston body a copper-beryllium alloy.

The material of the piston body may also be a copper-beryllium alloy. Additionally, a semi-cylindrical surrounding surface formed on the saddle body has an annular saddle ring groove surrounding the communication port and an annular packing mounting seat formed on the outer periphery of the saddle ring groove. It is also possible to attach a saddle ring made of a non-metallic material to the ring groove, and to attach a fireproof rubber packing containing thermally expandable graphite to the packing mounting seat via an n-agent. Further, both end surfaces of the above-mentioned fireproof packing may be expanded to form an expanded portion, and the expanded portion may be pressed between the flange-like abutting surfaces of the saddle body and the clamp to be mounted. Also.

An annular saddle ring groove is formed in a semi-cylindrical surrounding surface formed on the saddle body so as to surround the communication port, and a saddle ring made of a non-metallic material is attached to the saddle link groove,
The cross-sectional shape of the mounted saddle ring is formed from an elliptical shape to a substantially perfect circular shape from both ends of the surrounding surface toward the center bottom, and the wall thickness cross-sectional area is approximately the same. Further, a lip piece is provided toward the diametrical outer circumference at a position where the cross-sectional shape of the saddle ring approaches a substantially perfect circular shape. Furthermore, on the semi-cylindrical surrounding surface formed on the saddle body, an annular saddle ring groove with a constant depth surrounding the communication port and an annular packing mounting seat are cast on the outer periphery of the saddle ring groove. Alternatively, an annular saddle ring groove (spun trII) with a constant depth may be formed on a semi-cylindrical surrounding surface formed on the saddle body, and a saddle link may be formed in this saddle ring groove. It is also possible to install the annular seat by fitting it into the saddle.Also, a saddle ring groove (U groove) having a constant depth is formed in the semi-cylindrical surrounding surface formed on the saddle body. An annular seat formed on the saddle ring may be fitted into the ring groove with an adhesive.

Further, an annular saddle ring groove is formed in a semi-cylindrical surrounding surface formed on the saddle body so as to surround the communication port,
The depth of this saddle ring groove may be formed to be gradually shallower from both ends of the surrounding surface toward the center bottom, and a saddle ring having a substantially perfect circular cross section over the entire circumference may be mounted in this saddle ring groove.

In addition, the semi-cylindrical surrounding surface formed on the saddle body is machined to make it a smooth surface, and an annular sealing member that is integrally formed with a saddle ring made of a non-metallic material and a fireproof packing is interposed on this smooth surrounding surface. and secure it to the existing piping. The fireproof packing may be made of thermally expandable graphite-containing rubber, an asbestos sheet, or a metal plate, and the asbestos sheet or metal plate may be inserted into the saddle ring made of a non-metallic material.

(Function) Since the present invention is constructed as described above, the piping is connected to the saddle body and the clamp at the branch position of the piping without stopping the fluid, and then the perforation mechanism is activated by the explosive force of the gunpowder. When driven, the piping is cut by the cutting edge of the piston body to form a branch hole. In this case, the piston body is
By forming a hard nickel alloy film on the surface of the pipe, sparks are prevented from being generated when the pipe is cut, making it possible to apply it to pipes through which flammable fluids flow.

In addition, since the saddle ring and fireproof packing were attached to the semi-cylindrical surrounding surface formed on the saddle body to surround the communication port and surround the outer circumferential surface of the piping, the saddle body and the existing piping were sealed. Since the properties can be further improved, even highly permeable fluids such as gas can be reliably sealed.

(Embodiment) A preferred embodiment of the branch saddle according to the present invention will be described in detail with reference to FIGS. 1 to 12.

The outer periphery of the existing pipe 1 is surrounded by the semi-cylindrical surrounding surface 3 of the saddle body 2 and the semi-cylindrical surrounding surface 5 of the clamp 4, and both are fixed with bolts 6, as shown in FIG. Existing piping 1
Fix the branch saddle at the branch position.

The surrounding surface 3 of the saddle body 2 is provided with a communication port 8 that communicates with the branch passage 7 which is the secondary side outlet [l].

Further, inside the body 9 of the saddle main body 2, a punching mechanism 10 is provided which is driven by forced movement in a direction intersecting the piping 1.

This punching mechanism 10 includes a piston body 13 having a through hole 11 in the middle and a cutting edge part 12 at the tip part in a body 9, and a pin 16 for exploding an explosive part 15 on a cap 14 screwed onto the body 9. A driving pin (not shown) is inserted into a cap hole 17 made in the cap 14, and the pin 16 is exploded by one shot with a hammer or the like to drive the piston body 13.

Further, an O-ring 18 and a lock link 19 are provided on the outer periphery of the piston body 13, and a lock groove 2o for locking the lock link 19 is formed on the inner periphery of the body 9.

Further, the piston body 13, which is molded from a material having sufficient strength against Wf impact, has a hard coating of nickel alloy formed on its surface to prevent generation of sparks when the pipe 1 is cut. In this example, as another means, the piston body 13
A hard coating of nickel alloy may be formed on the surface of the piston body 13, and a resin may be composited into the structure thereof, or a hard coating of copper-beryllium alloy may be formed on the surface of the piston body 13. Also,
As shown in FIG. 3, the cutting edge portion 12 of the piston body 13 may be made of a copper-beryllium alloy, or the material of the piston body 13 may be made of a copper-beryllium alloy.

A semi-cylindrical surrounding surface 3 formed on the saddle body 2 includes a saddle link 21 whose circumference surrounds the communication port 8 and has the function of sealing the internal pressure, and a saddle ring 21 that has the function of sealing the internal pressure in the event of a fire or high temperature. 21 and also has the function of preventing deterioration of the saddle ring 21 due to ozone.
The following several examples of means may be selected and implemented as appropriate, either integrally or as separate structures.

In FIGS. 2 and 4, a semi-cylindrical surrounding surface 3 formed on the saddle body 2 includes a saddle link groove 23 which is annular and has a constant depth and which surrounds the communication port 8, and this saddle ring groove 23. An annular packing mounting seat 24 is formed in an as-cast state on the outer periphery of the saddle link groove 23 to reduce costs by not performing machining. At the same time, a fireproof packing 22 made of rubber and containing thermally expandable graphite is attached to the packing mounting seat 24 via an adhesive 25. The cross-sectional shape of the installed saddle ring 21 is shaped from an elliptical shape to a substantially perfect circular shape from both ends of the enclosure 3 to the center bottom, and the cross-sectional area of the wall thickness is approximately the same. to form. The reason for this is that when the perforation size of the pipe 1 is large, the inner diameter of the saddle link 21 is also large, and as shown in Fig. 6, the saddle link 21 has a structure that starts contacting the pipe 1 from part A and gradually reaches part B. Therefore, by making the saddle ring 21 have the cross-sectional area as described above, the tightening margins are made different so that when the piping 1 is fitted into the saddle ring 21, the A part and the B part come into line contact at the same time, and the A part gets rolled up. This prevents damage. Further, a lip piece 26 is provided toward the outer periphery in the diametrical direction at a position where the cross-sectional shape of the saddle ring 21 approaches a substantially perfect circular shape, and this lip piece 26 is attached using an adhesive 2 with a fireproof packing 22.
5 to securely hold the saddle ring 21 in position and maintain its fixing properties.

Furthermore, as shown in FIG. 5, both end surfaces of the fireproof packing 22 are expanded to form an expanded portion 27, and this expanded portion 27 is connected to the flange-shaped abutting surface 28 of the saddle body 2 and the flange of the clamp 4. It may also be installed by being pressed between the shaped abutting surfaces 29. In this case, when the nominal diameter of the existing piping 1 is small, it is ensured that it has a fireproof function.

Further, as shown in FIG. 8, a saddle link groove 23 (cast groove) which is annular and has a constant depth is formed in the semi-cylindrical surrounding surface 3 formed on the saddle body 2, surrounding the communication port 8. The annular seat 30 formed on the saddle ring 21 is fitted into the saddle ring groove 23 and attached thereto, or is fixed thereto via an adhesive. In this case, the rounded portion 31 contacts over the circumference to seal the internal pressure, and the annular seat portion 30'h<
This prevents the saddle ring 21 from getting stuck in the casting groove 23 and being rolled inward and damaged. Further, an annular saddle ring groove (casting groove) 32 is formed in the semi-cylindrical surrounding surface 3 formed on the saddle body 2, and this saddle ring groove 32
The depth is formed to become gradually shallower from both ends of the surrounding surface 3 along the center bottom. That is, as shown in FIG.
The contact surface φX with The center of φY of the casting groove 32 is eccentric to the center of φX, and the saddle ring 33 has a perfect circular cross section over the entire circumference, so it is the same size as the outer diameter of the pipe 1. The saddle ring 33 is fixed over the entire circumference by line contact or by a certain interference, has an internal pressure sealing function, and prevents the saddle ring 33 from being rolled inward and damaged.

Next, the semi-cylindrical surrounding surface 3 formed on the saddle body 2 was machined into a smooth surface, and a saddle ring 34 and a fireproof packing 35 made of a non-metallic material were integrally molded on this smooth surrounding surface 3. An annular sealing member 36 is attached, and the fireproof packing 35 can be made of thermally expandable graphite-containing rubber 35a, an asbestos sheet 35b, or a metal plate, as shown in FIGS. 10 to 12. Saddle ring 3 made of metal material
An asbestos sheet 34a or a metal plate may be inserted into the inside of 4. In this case, the saddle ring 34 has a seal structure in which the saddle ring 34 is in line contact at the circumference, has the function of sealing the internal pressure, and has the function of making the interference of the saddle ring 34 constant, and the seal member 36 is connected to the saddle ring 34. It is securely attached to the main body 2 to ensure sealing performance.

37 is a branch hole drilled in the existing plumber by the drilling mechanism 10.

Next, the operation of the above embodiment will be explained.

Without stopping the fluid in the piping line, the saddle body 2 and the clamp 4 are placed around the branch position of the existing piping 1, and the bolt 6 is used to secure the hole.
When driven, the cutting edge portion 12 of the piston body 13
A branch hole 37 is formed by cutting. In this case, the piston body 13 has a function of preventing sparks from occurring when the pipe is cut by forming a hard nickel alloy film on its surface, etc., and can also be applied to pipes in which flammable fluid flows. .

In addition, since the saddle ring and fireproof packing were attached to the semi-cylindrical surrounding surface 3 formed on the saddle body 2 in a state surrounding the communication port 8 to surround the outer peripheral surface of the piping 1, the saddle body 2 and Since the sealability with the existing piping 1 can be further improved, even highly permeable fluids such as gas can be reliably sealed.

Effects of the Invention As is clear from the above, the present invention has the following excellent effects.

In other words, since it is possible to reliably prevent the generation of sparks when cutting the pipe, it can also be used for pipes in which flammable fluids such as gas flow.Moreover, the saddle can be attached to the surrounding surface formed on the saddle body in a state surrounding the communication port. Since the ring and fireproof packing are attached to securely surround the outer peripheral surface of the piping, it is possible to significantly improve the sealing performance between the saddle body and the existing piping.

[Brief explanation of the drawing]

1 to 12 show an embodiment of the branch saddle according to the present invention. FIG. 1 is a partially cutaway perspective view showing the branch saddle fixed to a pipe and drilled, and FIG. A is a perspective view showing the surrounding surface formed on the saddle body, FIG. Figure 3 is a sectional view showing an example of the piston body;
Figure A is a front view of the surrounding surface of the saddle body, Figure 4B is a front view of the saddle ring, Figure 4C is a rear view showing the adhesive coated side of the fireproof packing, and Figure 5A is the surround of the saddle body. Figure 5B is a front view of the saddle ring, Figure 5C is a front view of the fireproof packing, Figure 6 is an explanatory diagram showing the contact state between the saddle ring and piping, and Figure 7A is the saddle ring. A perspective view of the ring, FIG. 7B is a cross-sectional view of the saddle ring, FIG. 8 is a partially sectional explanatory view showing an example of how the saddle body and the saddle ring are attached, and FIG. 9 is an example of how the saddle ring is attached to the saddle body. Fig. 10A is a front view showing an integrated structure type of saddle ring and fireproof packing, and Fig. 10B is a same as above.
11 and 12 are partial sectional views showing the other side. 1... Existing piping 2... Saddle body 3.5...
... Piping surrounding surface 4 ... Clamp 7 ... Branch path 8 ... Communication port 10 ... Perforation mechanism 11 ... Award passage hole 12.
...Blade tip 13...Piston body 15...
Gunpowder part 21.33.34...Saddle ring 22.3
5... Fireproof packing 23. 32... Saddle ring groove 24... Packing mounting seat 25... Adhesive 26
...Lip piece 27...Expansion part 28.29...
...Abutment surface 30...Annular seat part Fig. 1

Claims (1)

[Scope of Claims] (1) A saddle body and a clamp are surrounded and fixed to the outer periphery of the piping, a communication port communicating with the branch path is formed on the piping surrounding surface of the saddle body, and a perforation is provided inside the saddle body. In a branching saddle in which the mechanism is forcibly moved in the direction intersecting the piping to perforate the piping part located at the communication port, the above-mentioned perforating mechanism has a piston body driven by an appropriate drive source and a piston body at the tip of the piston body. It consists of a cutting edge section provided and a through hole formed in the middle, and is further characterized in that a saddle ring and fireproof packing are attached to the semi-cylindrical surrounding surface formed in the saddle body so as to surround the communicating hole. A branched saddle. (2) The branch saddle according to claim 1, wherein the driving source is the explosive force of gunpowder provided at the end of the piston body. (3) The branch saddle according to claim 1 or 2, wherein a hard coating of nickel alloy is formed on the surface of the piston body. (4) The branch saddle according to claim 1 or 2, wherein a hard coating of nickel alloy is formed on the surface of the piston body, and the structure is composited with resin. (5) The branch saddle according to claim 1 or 2, wherein a hard coating of copper-beryllium alloy is formed on the surface of the piston body. (6) The branch saddle according to claim 1 or 2, wherein the cutting edge portion of the piston body is made of a copper-beryllium alloy. (7) The branch saddle according to claim 1 or 2, wherein the material of the piston body is a copper-beryllium alloy. (8) forming an annular saddle ring groove and an annular packing mounting seat at the outer circumferential position of the saddle ring groove in a state surrounding the communication port in a semi-cylindrical surrounding surface formed on the saddle body;
Claim 1: A saddle ring made of a non-metallic material is attached to the saddle ring groove, and a fireproof rubber packing containing thermally expandable graphite is attached to the packing mounting seat via an adhesive.
7. The branched saddle according to 7. (9) The branch according to claim 8, wherein both end surfaces of the fireproof packing are expanded to form an expanded portion, and the expanded portion is compressed between the saddle body and the flange-like abutting surfaces of the clamp. saddle. (10) On the semi-cylindrical surrounding surface formed on the saddle body,
An annular saddle ring groove is formed surrounding the communication port, a saddle ring made of a non-metallic material is attached to this saddle ring groove, and the cross-sectional shape of the attached saddle ring is changed from both ends of the surrounding surface to the center bottom. 10. The branch saddle according to claim 1, wherein the branch saddle is formed from an elliptical shape to a substantially perfect circular shape, and has substantially the same wall thickness cross-sectional area. (11) The branch saddle according to any one of claims 1 to 10, wherein a lip piece is provided toward the diametrically outer circumference at a position where the cross-sectional shape of the saddle ring approaches a substantially perfect circular shape. (12) On the semi-cylindrical surrounding surface formed on the saddle body,
12. The branch saddle according to claim 1, further comprising an annular saddle ring groove having a constant depth surrounding the communication port and an annular packing mounting seat formed in an as-cast state on the outer periphery of the saddle ring groove. (13) On the semi-cylindrical surrounding surface formed on the saddle body,
Claims 1 to 12, wherein an annular saddle ring groove (casting groove) having a constant depth is formed surrounding the communication port, and an annular seat formed on the saddle ring is fitted into the saddle ring groove. branch saddle. (14) On the semi-cylindrical surrounding surface formed on the saddle body,
Claim 1: An annular saddle ring groove (casting groove) having a constant depth is formed surrounding the communication port, and an annular seat formed on the saddle ring is fitted into the saddle ring groove with an adhesive. The branched saddle according to any one of 1 to 13. (15) On the semi-cylindrical surrounding surface formed on the saddle body,
15. The branch saddle according to claim 1, wherein an annular saddle ring groove is formed to surround the communication port, and the depth of the saddle ring groove is gradually shallower from both ends of the surrounding surface toward the center bottom. . (16) The semi-cylindrical surrounding surface formed on the saddle body is machined to make it a smooth surface, and a fireproof packing is integrally molded or inserted into this smooth surrounding surface on the outer circumferential side of the saddle ring made of non-metallic material. 8. The branch saddle according to claim 1, wherein the existing piping is fixed with an annular sealing member interposed therebetween. (17) Claim 16 wherein the fireproof packing is rubber containing thermally expandable graphite.
Branch saddle as described. (18) The branch saddle according to claim 16, wherein the fireproof packing is an asbestos sheet or a metal plate. (19) The branch saddle according to any one of claims 16 to 18, wherein an asbestos sheet is inserted into the inner peripheral side of the saddle ring made of a non-metallic material. (20) The branch saddle according to any one of claims 16 to 18, wherein a metal plate is inserted into the inner peripheral side of the saddle ring made of a non-metallic material.