JPH0596676U - Lockout fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] In a retaining pipe fitting, when the joining work is completed by tightening the combination push ring to the socket via the rubber ring with the bolts and nuts, the combination push ring itself is formed with the specified inner diameter and the pipe outer circumference. It is an object of the present invention to configure so that the clearance between the inner circumference of the combination push wheel and the inner circumference of the combination push wheel becomes even. [Structure] In the retaining pipe joint 1, each combination surface 3d of the push ring members 3a of the same shape forming the combination push ring 3
Is provided with a convex portion 3f and a concave portion 3g which are fitted to each other, and the inner diameter of the combination push wheel 3 formed with the push wheel member 3a is
When the retaining pipe joint 1 is joined, it is naturally formed to have a predetermined size, and the combination pressing wheel 3, the rubber ring 4, and the pipe 2 are abutted against each other in the inserted state, and the side surfaces are coaxially fitted to each other. 3, the convex ring 3c is formed on the rubber ring 3, and the concave ring 4a is formed on the rubber ring 4.

Description

[Detailed description of the device]

 In this invention, the pipe end inside the receiving port and the lock ring / up-up ring inside the receiving port are used to prevent the pipe from coming off, and the pipe inside the receiving port and the combination push ring is connected via a rubber ring. The present invention relates to a retaining pipe joint in which a combined push ring is tightened and joined to the above-mentioned socket with bolts and nuts. Conventionally, this type of retaining pipe joint is formed by combining the push ring members shown in Fig. 12 (a) and (b), and the joining procedure shown in Fig. 12 (c), that is, the push ring member on the top of the pipe to be joined to the receiving port. Is suspended through the inner circumference of the push wheel member, and the lower push wheel member is suspended via bolts inserted in holes provided on both sides of the upper push wheel member and the receiving flange (first 12 As shown in (e), when performing the joining work by tightening the above-mentioned combined push ring to the receiving port via the rubber ring, the pipe top and the pipe top should be joined so that the gap between the inner circumference of the upper push ring member and the pipe outer circumference is evenly joined. A wedge is driven from the outside between the inner circumference of the upper push ring member and adjusted to the required clearance, and the bolts and nuts are used to tighten the combined push ring into the socket, while the rubber ring is gradually inserted into the socket, and further wedges are attached. Adjust the required clearance at the top of the pipe while repeating In order to make the large gap between the bottom of the pipe and the inner circumference of the lower push ring member shown in Fig. 12 even, as in the case of the upper push ring member, just feel with one hand. Reliably (at a place where you cannot see) Lift the lower push ring member (If the lifting method is unclear, move the upper push ring member to move the wedges and drop it off) Repeating the above work, while using the other hand The retaining pipe fittings have been joined by tightening the combined push ring to the socket with bolts and nuts until the required force is reached. However, in recent years, this kind of pipe joining work has been mainly carried out in a narrow excavation trench in the underground of the road on which the vehicle passes, and the traffic conditions have become more severe year by year. Due to the demands and the shortage of workers, the quality of pipe joining workers declined, and so on.This type of retaining pipe joint, when the joining work is completed, the combination push ring is suspended from the pipe and It has become clear that the gap between the inner circumference of the combined push ring is extremely large, and the long-term guarantee of pressure and seismic resistance, which is the maximum mission of the retaining pipe joint, cannot be guaranteed. In order to solve the above practical problems of the retaining pipe joint, in order to easily maintain the required clearance between the pipe and the inner circumference of the upper push ring member during the retaining pipe joint joining work, FIG. Using the wedge for pipe joints (design registration 67805) shown in I and R in the procedure shown in Fig. 14 I and R, the welding work in the excavation groove was promoted though some welding work was promoted. In that case, it is not possible to visually check the gap between the bottom of the pipe and the inner circumference of the lower push ring member, and as mentioned above, lift the lower push ring member appropriately with one hand and completely tighten the bolt with the other hand. It was necessary to carry out the above, and we could not solve the basic problem of the conventional retaining pipe joint joining work. Due to the deterioration of the work environment for joining pipe retaining pipe joints and the strict demands of society for improvement, there has been a strict demand every year to improve the joints of retaining pipe joints so that they can be joined more easily, reliably and quickly. In order to solve the problems of the above-mentioned joining work, the retaining pipe fitting of the present invention forms a combined push ring through the bolts of the upper and lower push ring members without using various wedges, and at the same time, forms a rubber ring. By simply tightening each of the above bolts to the receiving port with the intervening space, the gap between the outer circumference of the pipe and the inner circumference of the push ring can be joined evenly by themselves. is there. The pipe end is built into the socket and the lock ring / backup ring inside the socket is used to prevent the pipe from coming off, and the combination push ring is bolted to the socket through the rubber ring installed inside the socket and the combination push ring. -For retaining pipe joints that are tightened and joined with nuts. On the side face of the combined push ring formed by the upper and lower same-shaped push ring members that faces the rubber ring of the annular part, a convex ring having a vertical cross-section is provided coaxially with the annular part, and the rubber ring that faces the convex ring. A concave ring to be fitted to the convex ring is provided on the side surface of the rubber member coaxially with the inner circumference of the rubber ring, and holes for communication bolts are fitted to each other on the paired surfaces of the upper and lower pushing wheel members facing each other. A retaining pipe joint characterized in that it is configured with a convex portion and a concave portion that fit together. Regarding the function of the retaining pipe fitting of this invention. At the time of joining, when each bolt is passed through the combination push wheel and each bolt hole provided in the socket, the upper push wheel member is suspended from the pipe and the lower push wheel member is suspended from the upper push wheel member via the bolt. When tightening the combination push wheel into the socket through the rubber ring with each bolt, the upper and lower combination push wheels are first crimped by the fitting resistance of the rubber ring into the socket, and the combination parts on both sides are crimped to set on the combination surface. The concave portions are guided by the convex portions and are fitted into each other, and the combined push ring is naturally formed to have a required inner diameter. The bolt further advances the tightening of the combined push ring to the receiving port, and the convex ring of the combined push ring is guided to the concave ring of the rubber ring so that the convex ring and the concave ring are fitted and the rubber ring is received when the required tightening force is reached. It fits well in the mouth and the work of joining the retaining pipe joint is completed. As for the effect, during the work of joining the retaining pipe joint, the bolts are passed through the holes provided in the receptacle and the combination push ring as described above until the required force is tightened until the joint is completed. In addition, the upper and lower push ring members naturally form a combined push ring with the required inner diameter.Furthermore, the inner circumference of the rubber ring and the concave ring are formed coaxially, and the annular portion and the convex ring of the combined push ring are formed on the same axis. Therefore, the pipe and the combined push ring are naturally joined to each other in a coaxial state, and the intervals between the outer circumference of the pipe and the inner circumference of the combined push ring are also equal. Therefore, the retaining pipe joint of the present invention enables extremely easy, reliable and quick joining work without requiring skilled workers. Therefore, the retaining pipe joint of the present invention has a very remarkable effect of solving all the problems in the work of joining the retaining pipe joint up to now. An embodiment will be described with reference to FIGS. The convex ring portion 2a at the end of the pipe 2 inside the receiving port 5 and the lock ring 5c inside the receiving port 5 constitute a pipe pull-out preventing function, and are installed inside the receiving port 5 and the combination push ring 3. In the retaining pipe joint 1 in which the combined push ring 3 is tightened and joined to the receiving port 5 via the rubber ring 4 with the bolt 6 and the nut 6a. (FIG. 12) A convex ring 3c having a vertical cross section is annularly formed on the side surface of the annular portion 3b of the combined push wheel 3 in which both ends of the same push wheel member 3a are formed in a combined manner at the upper and lower sides of the combined push wheel 3 to face the rubber ring 4. On the side surface of the rubber ring 4 provided coaxially with the portion 3b and opposite to the convex ring 3c, a concave ring 4a fitted to the convex ring 3c is provided coaxially with the inner circumference of the rubber ring 4, and The retaining pipe fitting 1 is characterized in that a hole 3e for the bolt 6 that communicates with each other and a convex portion 3f and a concave portion 3g that are fitted with each other are provided on the combination surface 3d of 3a. Regarding the action of the retaining pipe joint 1, when the retaining pipe joint 1 is joined, when each bolt 6 is passed through each hole 5b for the bolt 6 provided on the combination push ring 3 and the flange 5a of the receiving port 5, the upper push ring The member 3a is suspended on the pipe 2, and the lower push ring member 3a is suspended on the upper push ring member 3a via the bolt 6 in the combination portion 3h, so that the bottom of the pipe 2 and the inner circumference of the lower push ring member 3a are connected. Although a large gap (gap) is generated in (Fig. 10, 11, 13, C. E), the combination push ring 3 in the above state is received through the rubber ring 4 with each bolt 6 as it is and the receiving port 5 When the tightening is started, the rubber ring 4 is hung on the upper push ring member 3a by the insertion resistance in the receiving opening, and the lower push ring member 3a is suspended from the upper push ring member 3a. (Fig. 11), so that it is provided on each of the combination surfaces 3d. Parts 3f both mating surface 3d rising lower part of the pressing ring member 3a is guided in a recess 3g provided in the mating surface 3d is fitted, naturally combined pressing ring 3 is formed, and immediately the required internal diameter. Further, as the bolt 6 further tightens the combination push wheel 3 to the receiving port 5, the rubber ring 4 is further pressed into the outer periphery of the pipe 2 and the receiving port 5 to increase the tightening force of the bolt 6, and The force is gradually and strongly applied to the side surface of the rubber ring 4 while the side surface of the annular portion 3b of the combination push wheel 3 is suspended from the pipe 2. Due to this strong pressure, the convex ring 3c of the annular portion 3b is guided to the edge of the concave ring 4a of the rubber ring 4 fitted to the pipe 2, and gradually shifts to the one with less resistance. When the tightening force of 6 reaches a required value and the joining of the retaining pipe joint 1 is completed, the convex ring 3c is completely fitted to the concave ring 4a. At the time of criticism, since the tube 2 and the rubber ring 4 are coaxial, and the combination push wheel 3 and the rubber ring 4 are coaxial, the interval (gap) between the outer circumference of the tube 2 and the inner circumference of the combination push ring 3 is naturally equal, and the retaining ring is prevented. The pipe joint 1 is in the most desirable joining state when the joining work is completed. (Figs. 8, 9, 11 and 12) On the effect of the retaining ring 1. The retaining pipe fitting 1 of the present invention uses the bolt that requires the most skill and time to join the retaining pipe joint while tightening the push ring member in the upper and lower unstable states with one hand on the pipe while At the same time as preventing the wedges that were driven in to adjust the clearance between the top and the inner circumference of the combined push ring in an unstable state, and at the same time tightening up to the required force for each bolt, the pipe bottom and the inner circumference of the combined push ring cannot be seen. The joints of the invention of the retaining pipe fittings are designed to be used for joint work in which the distance between the and By simply tightening the combined push ring to the receiving port to the required force, it is possible to join the most desirable outer circumference of the retaining pipe fitting and the inner circumference of the combined push ring at equal intervals (equal clearance), and to perform pressure-resistant and earthquake-resistant joining. It has become necessary to carry out quickly and reliably, and And it has a very pronounced effect of entirely solve the problem of fit fitting. Moreover, even if the structure of the retaining action inside the receiving port of the retaining pipe joint changes, the retaining pipe joint of the present invention which uses the rubber ring opposite to the retaining ring of the retaining pipe joint has the same remarkable effect. Can be demonstrated.

[Submission date] June 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a retaining pipe joint exclusively used for a pipeline for underground transportation of gas and fluid.

[0002]

[Prior Art]

 Conventionally, this type of retaining pipe fitting uses the push ring member shown in Fig. 13 a and b to install the combined push ring in the pipe joint in the pipe excavation groove, and the joining procedure shown in Fig. 13 c and d. That is, the push ring member is placed in a suspended state from the top on the pipe top inserted in the receiving port, and the bolts passed through the flanges of the receiving port are connected to both combination parts of the pressing ring member, and the respective bolts are The holes provided on the combined surfaces of both ends of the other push ring member that is in contact with the pipe from below are externally inserted, and the push ring member is suspended to form a quasi combination push ring. During the tightening work of the above-mentioned pseudo combination push ring to the receiving port with the bolts and nuts, the pipe top and the top of the pipe are joined so that at least the gap between the inner circumference of the push ring member and the outer circumference of the pipe is evenly joined. Drive a wedge from the outside between the inner circumference of the push ring member (Fig. 13).・ D) While repeating the adjustment work so as to form the required gap, at the same time, in order to make the gap between the lower push ring member and the pipe the same as in the case of the upper push ring member, one hand and one hand While repeating the work of lifting the lower push ring member (which cannot perform visual work) with the help of one hand, with many bolts and nuts with the other hand, physically push the combined push ring in the above state until the required force is reached. In the extremely severe working environment, we have been forced to carry out work to join the retaining pipe fittings.

Further, the excavation ditch for the retaining pipe joint joining work has been carried out under the road where the traffic conditions are becoming more and more severe year by year. As a result, accurate and quick joining work cannot be performed on-site for this type of retaining pipe fitting, so reliable pipeline functions such as earthquake resistance and pressure resistance cannot be obtained, which is a major social problem. Came.

Therefore, in order to solve the problems of the retaining pipe joint joining and the work thereof, the special wedges shown in FIG. 6 No. 6805) has been used in this case, the adjustment work of the gap between the pipe and the inner circumference of the push ring member at the top of the pipe was somewhat omitted, but the inner circumference of the lower push ring material, which is the most difficult during the bolting and joining work. The work of equalizing the clearance between the pipe and the periphery of the pipe bottom remains unresolved.

[0005]

[Problems to be solved by the device]

 the above

[0002]

[0003]

In view of the above, as the physical and environmental conditions of the pipe joining work worsen and the number of skilled workers advances, the coaxial joining work of the retaining pipe fittings using combination push-rings, rubber rings, etc. in the field is performed. We have decided to provide a retaining pipe joint that makes it extremely easy and reliable.

[0006]

[Means for Solving the Problems]

 Tighten the combined push ring to the receiving port with the bolt and nut through the rubber ring with the pipe inside, and provide the recesses and protrusions that fit with each other on the combination surface of the push ring members of the same shape when joining the retaining pipe joint. The formed combination push ring has a predetermined inner diameter, and furthermore, on both side surfaces of the combination push ring and the rubber ring opposite to each other, there are convex and concave rings fitted to each other around the pipe axis. And form a retaining pipe joint.

[0007]

[Operation] When the work is started by tightening the combined push ring into the socket with the bolt and nut through the rubber ring with the pipe inside, the upper push ring member is initially suspended from the top of the pipe, and the lower push ring member is The rubber ring is inserted into the receiving port through the combination pressing ring supported by the bolts that are in communication with the holes provided in the receiving port and the holes provided in both of the mating surfaces of the upper pushing wheel member, and the resistance is next increased. growing. When the fitting resistance increases, the convex portions provided on the mating surfaces of the upper and lower push wheel members are guided by the concave portions and are fitted to each other to form a combined push wheel having a predetermined inner diameter. Further, as the tightening of the bolts and nuts progresses, the rubber ring is installed inside the receiving port and does not move, increasing the resistance force rapidly. Due to this resistance, the retaining ring is joined to the retaining ring provided on the rubber ring and the convex ring provided on the combined push ring by itself. At this time, in the retaining pipe fitting of the present invention, the rubber ring and the combined push ring are fitted coaxially, and the combined push ring becomes coaxial with the pipe from the side, and the pipe outer circumference and the combined push ring inner circumference are equal. A gap is secured.

[0008]

【Example】

 Description will be given with reference to FIGS. 1 to 12 of the drawings. The end of the pipe 2 inserted in the receiving port 5 and the lock ring 5c and the backup ring 4b internally provided in the receiving port 5 constitute a retaining function for the pipe 2, and the receiving port 5 and the combination push ring 3 are provided. In the retaining pipe joint in which the pipe 2 which is inserted and communicated with and is fastened and joined to the receiving port 5 by the bolt 6 and the nut 6a via the rubber ring 4,

On the side surface of the rubber ring 4 which faces the combination push ring 3 with the tube 2 inserted therein, a concave ring 4a having a vertical cross-section is provided around the tube axis.

In the combination push wheel 3, the push wheel members 3a having the same shape are provided on the combination surfaces 3d of the combination portion 3h, which face each other, and the recesses 3g are provided for the projections 3f to be fitted together. The inner diameter of the formed annular portion 3b is formed to have a predetermined inner diameter.

On the side surface of the annular portion 3b of the combination push wheel 3 which faces the rubber ring 4, there is provided a convex ring 3c which fits into the concave ring 4a of the rubber ring 4 around the axis of the annular portion 3b. The formed retaining pipe joint 1 is configured.

[0012]

[Effect of the device]

 The retaining pipe fitting of this invention is a work for tightening the combined push ring to the receiving port through the rubber ring with the bolt and nut that requires the most skill and joining time even in the digging groove where the pipe joining work environment is severe. At the same time, the most difficult fine adjustment work such as using wedges is necessary to maintain the adjusted inner diameter of the combined push ring at a predetermined inner diameter and to form a uniform gap between the joint pipe and the inner circumference of the combined push ring. Instead, tighten the above bolts and nuts until the specified force is reached, and the retaining pipe fitting can be joined extremely quickly and reliably. It is possible to easily and surely solve various problems of conventional pipe joints of this type of retaining pipe joint at the piping site. It has a remarkable effect.

[0013]

[Brief description of drawings]

Fig. 1 is a front view of the push ring member. FIG. 2 shows A of FIG.
-It is a side view seen from B. Fig. 3 shows a combination push ring formed by combining the push ring members shown in Fig. 2. Fig. 4A-B is a sectional view of the combination pusher ring A-B in Fig. 3. 4A'-B 'shows the state immediately before the push wheel members form the combined push wheel. Fig. 5C-D is a sectional view of Fig. 3 combination push ring C-D. FIG. 5C'-D 'shows the state immediately before the push ring members form the combined push ring. Fig. 6 is a front view of the rubber ring. FIG. 7 shows an AB cross section of FIG. Fig. 8 is a front view seen from the combination push ring of Fig. 9 retaining pipe fitting. FIG. 9 shows a retaining pipe fitting and a partly longitudinal cross section thereof. FIG. 10 is a longitudinal sectional view of the pipe top portion, the pipe bottom portion, the combination portion and the like immediately before the combination push ring is formed by mounting the two push ring members on the pipe. The pipe joint of FIG. 11 shows a longitudinal section before tightening with a bolt through the rubber ring using the push ring member in the state of FIG. 12th
The figure shows a state in which the retaining pipe joint in the state shown in FIG. 11 is tightened and joined with a bolt to a required force. FIG. 13A shows the surface of a conventional push ring member. B indicates the back surface of the push wheel member of (a). C is a side view seen from the combination push ring of D before joining the conventional retaining pipe fittings. D is a partial longitudinal cross section of the front view of the conventional retaining pipe joint before joining. (E) shows the degree of suspension due to the upper and lower suspension states via the bolts of the combination part before joining of c and d. (Therefore, the distance between the pipe bottom and the inner circumference of the combined push ring shown in C) becomes significantly large. 3c ... convex ring 3
d ... Combination surface 3e ... Hole 3f ... Convex portion 3g ... Recessed portion 3
h ... Combination part 4 ... Rubber ring 4a ... Recessed ring 4b ... Bup-up ring 5 ... Receptacle 5a ... Flange 5b ... Bolt hole 5c ... Lock ring 6 ... Bolt 6a ... Nut

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[Procedure amendment]

[Submission date] June 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Name of device] Locking pipe fitting

[Scope of utility model registration request]

[Brief description of drawings]

FIG. 1 is a front view of a push wheel member.

[FIG. 2] FIG. 2 is a side view seen from AB in FIG. 1.

FIG. 3 is a front view of a combined push wheel formed by combining the push wheel members shown in FIGS. 1 and 2.

FIG. 4 is a cross-sectional view taken along the line AB of the combination push wheel of FIG.

FIG. 5 is a CD cross section of the combination push wheel of FIG.

FIG. 6 shows the front of the rubber ring.

FIG. 7 shows a cross section taken along the line AB of FIG.

FIG. 8 is a front view of the retaining pipe joint of FIG.

FIG. 9 is a side view showing a state in which the retaining pipe joint is joined as shown in FIG.

[Fig. 10] Fig. 10 shows a state in which the upper and lower push ring members are temporarily attached to a pipe before joining the retaining pipe joint.

FIG. 11 shows a vertical cross section of the retaining pipe joint when the retaining pipe joint is joined and the upper and lower push ring members are formed into a combined retaining ring from the state of FIG. 10 by the resistance of the rubber ring.

FIG. 12 is a vertical cross section of the retaining pipe joint of FIG. 11 when bolts and nuts of the retaining pipe joint are completely tightened, that is, when joining is completed.

[Fig. 13] Figs. 13A and 13B show a push ring member of a conventional retaining pipe joint. C shows the front view of the state in which the gap between the pipe and the inner circumference of the upper push ring member is adjusted by using a wedge when the conventional retaining ring is joined. D shows a vertical cross-sectional state of a side surface part of FIG. (E) shows the relationship between the bolts of the upper / lower push ring member combination portion and the holes for both bolts when temporarily suspended from the pipe of the combination push wheel.

[Fig. 14] (a) shows a wedge for adjusting the clearance between the pipe and the combination push ring. (B) shows a partial longitudinal cross-section of a conventional wedge-joint-joining b.

[Description of Reference Signs] 1 ... retaining pipe joint 2 ... pipe 2d ... convex ring portion 3 ... combination push ring 3a ... push ring member 3b ... annular portion 3c ... convex ring 3d ... combination surface 3e ... hole 3f ... convex portion 3g ... concave portion 3h ... Combination part 4 ... Rubber ring 4a ... Recessed ring 4b ...
Backup ring 5 ... Receptacle 5a ... Flange 5b ... Bolt hole 5c ... Lock ring 6 ... Bolt 6a ... Nut

Claims (1)

[Claims for utility model registration] The pipe end is configured with a pipe end inside the receiving port, a lock ring inside the receiving port, and a pack-up ring, and a rubber ring is attached to the pipe inside the receiving port and the combination push ring. In a retaining pipe joint in which a combined push ring is tightened and joined to the above-mentioned receiving port with bolts and nuts, 1) A convex ring with a convex vertical section is formed on the side face opposite to the annular rubber ring formed by the combined push ring. Is provided, and on the side surface of the rubber ring opposite to the convex ring, a retaining pipe joint 2 is formed by forming a concave ring that fits into the convex ring. Claims for utility model registration according to claim 1 in which convex portions and recesses for fitting with each other are provided respectively on the surfaces. Claims for utility model registration for forming a combination push ring with push ring members of the same shape. The retaining pipe fitting according to item 2. 4. The retaining pipe joint according to any one of claims 1 to 3, wherein the annular portion forming the combination push ring and the convex ring are formed coaxially. 5. The retaining pipe joint according to any one of claims 1 to 4, wherein the inner peripheral axis of the rubber ring and the axis of the concave ring are formed coaxially.