JPH061972U - Rubber ring for piping - Google Patents

Abstract

(57) [Summary] [Purpose] Even in a vacuum type sewage transfer system where the pipe internal pressure changes between atmospheric pressure and vacuum pressure, it exhibits sufficient sealing properties and is easily inserted into the pipe. . [Structure] The upper half 2 of the main body of the rubber ring 1 for piping is fitted in a groove 13 formed in the inner periphery of the pipe body 10 in the vicinity of the tip of the receiving portion 11, and the lower half of the rubber ring main body is fitted. The portion 5 is formed to have the same width as the upper half portion 2, and a large-diameter semicircular portion 6 in which a plurality of projecting ridge portions 8 having a substantially semicircular cross section are formed to project, and the large-diameter semicircular portion 6 It is formed to have a slightly smaller diameter, and has a cross-sectional shape in which the small-diameter semicircular portion 7 located on the tip end side of the receiving portion of the concave groove 13 has a continuous cross-sectional shape, and the rubber ring 1 for piping is used for receiving portion of one pipe body 10. 11
It is mounted in the concave groove 13 of the other and is inserted between the outer periphery of the distal end of the insertion opening 14 of the other tube 10 inserted into the receiving opening 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a rubber ring for piping used in a vacuum type sewage transfer system and the like.

[0002]

[Prior art]

 Piping methods that use a rubber ring for piping at the joints of pipes are widely used, such as water pipes where pressure is applied to the pipes and sewer pipes that are used in a nearly unpressurized state. The piping rubber ring used here has a ring-shaped engaged portion on the outer circumference of the rubber ring body, and a fin-shaped lip protruding on the inner circumference. Insert the rubber ring main body between the tubular body having the groove-shaped engaging portion formed at a close position and the tubular body inserted into the tubular body by inserting the insertion portion into the receiving portion. The liquid-tightness of the pipe joint is maintained by interposing the engaged portion in the state of being engaged with the engaging portion of the receiving portion. In this case, the inner diameter of the lip portion is set smaller than the outer diameter of the inner tubular body so that the lip portion comes into close contact with the inserted outer circumferential surface of the tubular body in a compressed state.

[0003]

[Problems to be solved by the device]

 The rubber ring for pipes with such a structure is suitable for insertion into a pipe at a high compression rate because it exhibits seal performance under high pressure like water pipes. There is a drawback that the insertability of the other tube's insertion part into the receiving part to which the ring is attached deteriorates.

On the other hand, when it is applied to a sewer pipe without a pressure, it is used in a state in which the compressibility is lowered with good insertability as described above, but in this case, the sealing property is deteriorated. There is. In particular, sewer pipes that incorporate a vacuum-type sewage transfer system cause a pulsating phenomenon that changes between atmospheric pressure and atmospheric pressure (vacuum degree is about 50 Kpa), so poor sealing performance is unsatisfactory. There is a problem of becoming. Further, in the case of a negative pressure, there is also a problem that the lip portion is pulled inside the tubular body and is deformed, thereby impairing the sealing performance.

Therefore, in order to solve the above problems, the present invention exerts sufficient sealing property even in a vacuum type sewage transfer system in which the pipe internal pressure changes between atmospheric pressure and vacuum pressure, Moreover, it is an object of the present invention to provide a rubber ring for piping that can be easily inserted into the pipe.

[0006]

[Means for Solving the Problems]

 Next, means for achieving the above object will be described with reference to FIGS. 1 to 4 corresponding to the embodiment. The rubber ring 1 for piping according to the present invention is mounted in a groove 13 formed in the inner periphery of the receiving portion 11 of one pipe body 10 near the distal end thereof, and is inserted into the receiving pipe portion 11 of the other pipe body. In the rubber ring 1 for piping, which is interposed between the outer periphery of the tip of the insertion opening 14 of 10 and the upper half 2 of the body, the lower half 5 of the main body is fitted into the groove 13. Is a large-diameter semicircular portion 6 that is formed to have the same width as the upper half portion 2 and that is formed with a plurality of protrusions 8 having a substantially semicircular cross section. It is characterized in that it is formed to have a small diameter and the small diameter semicircular portion 7 located on the tip end side of the receiving portion of the concave groove 13 has a continuous cross-sectional shape.

[0007]

[Action]

 In the concave groove 13 formed on the inner periphery of the receiving portion 11 of the tubular body 10, the small diameter semicircular portion 7 of the lower half portion 5 of the main body is located at the tip side of the receiving portion 11 of the main body. Fit the upper half 2 and fit it. Then, the insertion opening 14 of the other tubular body 10 is inserted into the one tubular body 10 to which the rubber ring 1 for piping is attached. When the other tubular body 10 is inserted, the tip of the insertion opening 14 compresses the small-diameter semicircular portion 7 of the rubber pipe ring 1 and the large-diameter semicircular portion 6 as well. The tube bodies are connected to each other with the rubber ring 1 interposed therebetween.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. First, the pipe body 10 using the rubber ring 1 for piping of the present invention will be described. As shown in FIGS. 1 and 3, one end 10a of the tubular body 10 is formed to have a diameter slightly larger than the outer diameter of the main body of the tubular body 10 to form a receiving portion 11, and the vicinity of the tip of the receiving portion 11 is formed. Further, a bulging portion 12 having a larger diameter than the receiving portion 11 is formed. A concave groove 13 having a curved surface is formed on the inner peripheral surface of the bulging portion 12. Further, the other end 10b of the tubular body 10 has the same diameter as the outer diameter of the main body of the tubular body 10, and an insertion portion 14 having an outer peripheral surface at the tip thereof is a tapered surface 14a is formed. The rubber ring 1 for piping is attached to the groove 13 formed in the receiving portion 11 of each pipe body 10, and the receiving portion 11 of the pipe body 10 has the insertion portion 14 of another pipe body 10. After being inserted, the receiving portion of another tubular body is inserted into the insertion opening 14 to form a conduit.

Next, the rubber ring 1 for piping of the present embodiment is formed in an endless ring shape, and as shown in FIGS. 1 and 3, in the vicinity of the tip of the receiving portion 11 formed in the pipe body 10. It is mounted in the concave groove 13 formed on the inner peripheral surface. As shown in FIG. 2, the rubber ring 1 has a shape in which the upper half portion 2 of the main body has a cross-sectional shape that matches the shape of the concave groove 13 formed in the receiving portion 11 of the tubular body 10 described above. It is formed into a cross-sectional shape that is substantially formed into a shape, and is composed of a sloped portion 3 having a step portion 3a and a curved surface portion 4 having a cutout portion 4a.

The lower half portion 5 of the rubber ring 1 is formed to have a width equal to the width of the upper half portion 2 and is formed integrally with the upper half portion 2. The lower half part 5 is formed in a substantially gourd-shaped cross-section in which a large diameter semicircular part 6 and a small diameter semicircular part 7 slightly smaller than the large diameter semicircular part 6 are continuously formed. ing.

The large-diameter semicircular portion 6 is formed continuously with the curved surface portion 4 of the upper half portion 2 described above, and as shown in FIG. A plurality of circular protrusions 8, two protrusions 8 in this embodiment, are formed so as to protrude.

The small-diameter semicircular portion 7 is connected to the slope 3 of the upper half portion 2 and is formed in parallel with the large-diameter semicircular portion 6, as shown in FIG. The rubber ring 1 is provided with three projections 9 each having a triangular cross section on its inner peripheral surface.

Next, a case will be described in which such a rubber pipe ring 1 is used to perform sewer pipes equipped with a vacuum type sewerage transport system. First, in the tubular body 10, the rubber ring 1 for piping is mounted in the concave groove 13 formed in the inner periphery of the receiving portion 11. As shown in FIG. 3, this mounting is performed by a small-diameter semicircular portion of the slope portion 3 formed on the upper half portion 2 of the rubber ring body and the lower half portion 5 formed continuously with the slope portion 3. The upper half portion 2 of the main body is fitted into the concave groove 13 and mounted so that 7 is on the tip side of the receiving portion 11.

Next, when the insertion portions 14 of the other pipe bodies 10 are inserted into the pipe body 10 to which the rubber ring 1 for piping is attached and the pipe bodies 10 are connected to each other, the other pipe body 10 is inserted. The tip of the mouth portion 14 compresses the small-diameter semicircular portion 7 of the rubber ring 1 for piping, and also the large-diameter semicircular portion 6 of the pipe rubber ring 1, thereby compressing the rubber between the pipe bodies 10 as shown in FIG. The ring 1 is connected with it interposed.

At the time of connection, the tip of the insertion port 14 initially penetrates while expanding the protrusion 9 of the small-diameter semicircular portion 7, and sand, dust, and the like on the outer peripheral surface of the tubular body 10 will be the tip of this protrusion 9. However, here, the upper half portion 2 of the rubber ring 1 main body located in the concave groove 13 does not bring a strong compressed state. When the tip of the insertion opening 14 further enters, the ridge 8 is pushed by the tip and expanded. At this time, since the cross-sectional shape of the ridge 8 is substantially semicircular, the insertion resistance is small.

Now, the difference in effect between the case where the rubber ring 1 for piping of the present invention is used for the pipe connection with the nominal diameter of 100 mm and the case where the conventional rubber ring having the fin-shaped lip portion is adopted is tested. As a result, we obtained the following data. That is, in the negative pressure performance (0.8 kgf / cm ² ) within 24 hours, the former (present invention) and the latter (conventional) exhibited similar compatibility, but repeated atmospheric pressure and vacuum pressure ( In the (200,000 times) experiment, the former maintained compatibility, but the latter became incompatible halfway. Further, when comparing the compression rates of the two, the conventional rubber ring improved from 13% to 16%. In addition, the insertability of the pipes during construction, that is, the insertion force between the pipes, is a rather large number of 100kgf for the latter, despite the former being 60kgf, confirming the superiority of the present invention. Has been.

[0017]

[Effect of device]

 As described above, in the rubber ring for piping according to the present invention, the large-diameter semicircular portion formed in the lower half portion of the rubber ring main body is formed with a plurality of protrusions having a semicircular cross section, which results in compression. Since the rate is improved, the sealing performance is improved, and even in a vacuum type sewage transfer system where a pulsation phenomenon occurs in which the internal pressure of the pipe changes between atmospheric pressure and vacuum pressure, sufficient sealing is achieved. There is an effect that it is possible to exert the sex. In addition, by forming the ridge portion, there is an effect that the tubular bodies can be easily inserted into each other.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a pipe body to which a rubber ring for piping according to an embodiment of the present invention is attached.

FIG. 2 is a sectional view of a rubber ring for piping according to the same embodiment.

FIG. 3 is a side sectional view showing a state where a rubber ring for piping according to the embodiment is attached to a pipe body.

FIG. 4 is a side sectional view showing a state where a rubber ring for piping according to the embodiment is interposed between pipe bodies.

[Explanation of symbols]

 1 ... Piping rubber ring 2 ... Upper half 5 ... Lower half 6 ... Large diameter semi-circle 7 ... Small diameter semi-circle 8 ... Projection 10 ... Tubular body 11 ... Receptacle 13 ... Recessed groove 14 ... Insert Department

Claims (1)

[Scope of utility model registration request] 1. An outer periphery of a tip of an insertion opening of another tube which is fitted in a groove formed in an inner periphery of a tip of the receiving section of one tube and is inserted into the receiving section. In the rubber ring for piping interposed between, the upper half of the main body is fitted into the groove, the lower half of the main body is formed to have the same width as the upper half, and a plurality of A large-diameter semi-circular portion in which a ridge having a substantially semi-circular cross-section is formed to project, and a small-diameter semi-circular portion formed slightly smaller in diameter than the large-diameter semi-circular portion and located on the tip end side of the recessed groove receiving portion. A rubber ring for piping, which has a continuous cross-section.