JP3179755U - Plastic plastic tube structure - Google Patents

Abstract

[PROBLEMS] To solve the problem of water tightness, water pressure resistance, and impact resistance of pipe joints even when the socket structure of a plastic plastic pipe is piped on a curved terrain or when the pipe is bent or undulated due to an earthquake. Providing a plastic tube structure that can keep up.
A lip portion has a conical shape (the outer end is large and the inner end is small), and the diameter of the lip portion exceeds the bush ring insertion type pressure-transporting rubber ring. Is smaller and the inner end is larger), and the allowable angle of deflection is increased by 3 to 4 times compared to the conventional plastic plastic tube, and the excellent water tightness inherent in the conventional plastic plastic tube, Water pressure resistance and impact resistance can be maintained.
[Selection] Figure 2

Description

  The present invention relates to a plastic plastic tube structure.

  The applicant of the present invention is a manufacturer of polyvinyl chloride pipe (hereinafter referred to as a PVC pipe) having the largest scale, the highest throughput, and the highest quality in Taiwan. Researched and developed products related to plastic pipes are still being widely adopted in Taiwan. The main factors are that the product structure of the plastic plastic pipe according to the applicant of the present invention is special, the water pressure resistance and impact resistance are high, the water tightness is excellent, and the construction is simple. There is to be. The applicant of the present invention made a great contribution to breaking through the PVC pipe sleeve joint socket structure.

  However, after the great earthquake in Taiwan 921, the applicant of the present invention has applied the above-mentioned plastic plastic pipe products and the actual construction for many years due to the extent of damage to the pipes. Found the situation. As a result, the present PVC pipe has a more favorable impact resistance, and the plastic plastic pipe socket structure is suitable for pipe wiring in curved terrain, as well as pipe bending and undulation fluctuations due to earthquakes. Even in this case, it is considered necessary to maintain the water tightness, water pressure resistance, and impact resistance of the pipe joint.

  In the conventional plastic plastic pipe structure (see FIG. 4), the lip portion 30 and the inner end diameter 40 of the pipe joint 20 are linear, and once the fitting with the pipe material is completed, there is a gap between the two. When the pipe is curved, fitting work may be difficult when the pipe is curved, and if the fitting is forcibly performed, the rubber ring 50 is press-fitted and water leakage occurs. It becomes. If the fitting can be carried out smoothly, the allowable bending angle (see α angle shown in FIG. 5) at the joint is about 3 to 4 degrees, which is extremely limited. Further, the joint portion between the lip portion 30 and the inner end diameter 40 of the pipe joint 20 of the conventional plastic plastic pipe shown in FIG. 5 is easily bent and damaged, and when pressure is applied unevenly to the rubber ring 50. Water leakage often occurs, and in a place where the construction site is not good, a malfunction of the water leakage may be more likely to occur due to poor construction.

  Further, the pipe joint 20 of the plastic plastic pipe has a sufficient interval at the lip portion 30 for easy fitting work, and further fits the rubber ring 50 to ensure sufficient elasticity. The hardness number is maintained at 50 to 60 degrees with Shore A. However, when the pipe joining work is completed and actually used, the rubber ring 50 is always urged to move forward by the applied water pressure, so that the watertight function is lost. Leakage may occur. When it is necessary to bend the pipe according to the terrain, the pipe is bent so that the interval on one side of its inner diameter is increased and water leakage is likely to occur. Further, when the water pressure is too high, the rubber ring 50 leaves the normal watertight position from the interval, and a large amount of water leaks. However, in order to avoid the inconvenience described above, if the interval at the location of the lip portion 30 is reduced, the inconvenience of fitting work becomes extremely difficult and troublesome, and it is particularly necessary that the pipe bend in accordance with the terrain. In this case, since the fitting work becomes more difficult, if the fitting is forcibly performed, the rubber ring 50 is inevitably squeezed out from the installation location, and the sealing effect cannot be exhibited, resulting in water leakage. May end up. Further, if the hardness of the rubber ring 50 is increased in order to avoid the leakage of the rubber ring 50 due to internal pressure and the occurrence of water leakage, the construction of the rubber ring 50 becomes hard and the construction becomes difficult, resulting in poor watertightness. Such a disadvantage occurs.

  In addition, since Taiwan is originally located in an earthquake zone, and the strata undulates and curves due to the earthquake, the joints of plastic pipes are damaged or leaked due to phenomena such as depressions, undulations, or deflections due to strata changes. Often occurs.

  In the present invention, due to the plasticity and flexibility of the pipe joint, the allowable bending angle of the pipe joint (see α angle shown in FIG. 5) is 3 to 4 times that of the conventional plastic plastic pipe structure. An object of the present invention is to provide a plastic tube structure that can maintain the excellent water tightness, water pressure resistance, and impact resistance inherent in conventional plastic plastic tubes even under bending conditions. In addition, the applicant of the present invention is researching and developing a plastic plastic pipe structure, and at the same time, it can be assembled to the plastic plastic pipe, thereby improving the rigidity of the rubber ring and by excessive internal pressure. An object of the present invention is to provide a bush ring insertion type pressure transport rubber ring structure which has a characteristic that construction is easy and water-tightness is excellent while avoiding the rubber ring from being detached. When the rubber ring structure for pressure transport with bush ring insertion according to the present invention is used in combination with a plastic tube, the water tightness, water pressure resistance and impact resistance of the plastic tube can be further improved. There is also an adjustment effect.

  In the present invention, the tube wall cross section at the tip is formed in a two-stage V-shaped convex shape, the insertion port of the lip is formed in a cone shape with a large outer end and a small inner end, and the tube diameter portion is made of rubber. In a region adjacent to the region where the ring is provided, the outer end is small and the inner end is formed in an inverted conical shape, so that the bending angle to be fitted and the ease of fitting can be improved, and water tightness, water pressure resistance, Provided is a plastic plastic tube structure characterized in that plastic plastic tubes are configured to be fitted to each other in order to have excellent impact properties.

  The purpose of the present invention is mainly to increase the allowable deflection angle by 3 to 4 times as compared with the conventional plastic plastic tube, and to achieve the excellent water tightness, hydraulic strength, The present invention provides a novel plastic plastic pipe structure capable of maintaining impact resistance, and particularly an improved pipe joint structure of a plastic plastic pipe.

  The object of the present invention is that the lip portion has a conical shape whose outer end is larger than the inner end, and in the region beyond the place where the rubber ring is provided, the outer end is an inverted conical shape smaller than the inner end. Therefore, the present invention provides a novel plastic plastic tube structure in which the deflection allowable angle can be increased by 3 to 4 times compared to the conventional plastic plastic tube, and particularly an improvement in the shape of the tube joint of the plastic plastic tube.

  Furthermore, an object of the present invention is to provide a bush ring insertion type pressure transport rubber ring structure that can be assembled in accordance with the plastic tube according to the present invention. Since the rubber ring structure has a recessed middle step portion formed by contacting two arc circles so that the hard plastic bushing ring is fitted and positioned, the strength of the rubber ring structure can be improved. Therefore, the water tightness, water pressure resistance, and impact resistance of the plastic plastic tube according to the present invention can be further improved, and there is an effect of adjusting the tightness of the plastic plastic tube.

1 shows a cross-sectional view of a plastic plastic tube structure according to a preferred embodiment of the present invention. 1 is a cross-sectional view of an assembly structure of a plastic plastic tube and a bush ring-inserted pressure transport rubber ring according to a preferred embodiment of the present invention. FIG. 3 is a cross-sectional view of a hard plastic bushing ring structure fitted in a recess middle step of a bushing ring insertion type pressure transport rubber ring in a preferred embodiment according to the present invention, the cross section of which is U-shaped, semi-circular, circular, rectangular, A shape such as a square or a trapezoid is schematically shown. 1 shows a cross-sectional view of a conventional plastic plastic tube structure. An α angle of an allowable deflection angle of a joint portion of a conventional plastic plastic pipe is schematically shown.

  The biggest difference between the plastic plastic pipe structure according to the present invention shown in FIG. 1 and the conventional plastic plastic pipe structure shown in FIG. 4 is that the lip portion 30 and the inner end diameter 40 of the pipe joint 20 of the conventional plastic plastic pipe are different. Although both are linear, the joint lip part (opening end part) 11 of the plastic tube 1 according to the present invention has a conical shape whose outer end (front end side) is larger than the inner end (base end side). (Refer to FIG. 2 together), in the region of the tube diameter portion 12 beyond the location where the bush ring insertion type pressure transport rubber ring 2 is provided, an inverted conical shape whose outer end is smaller than the inner end It is to become. In other words, the structure of the plastic plastic tube 1 according to the present invention has a V-shaped convex shape with a two-step tube wall section at the tip, and the insertion opening of the lip portion 11 has a large outer end and a small inner end. The tube diameter portion 12 has an inverted conical shape with a small outer end and a large inner end in a region adjacent to the region where the rubber ring 2 is provided.

  Therefore, as shown in FIG. 1, when the conventional rubber ring 50 is set on the plastic tube 1 according to the present invention and then joined to the tube material of the male tube end 3, The allowable deflection angle (see the α angle shown in FIG. 5) can be increased by 3 to 4 times the allowable deflection angle of the conventional plastic plastic tube.

  For this reason, even when the topography is curved, or when the formation is undulated or curved due to an earthquake, the allowable bending angle of the pipe joint portion of the plastic plastic pipe 1 according to the present invention is greatly increased. Therefore, it is possible to maintain the excellent water tightness, water pressure resistance, and impact resistance inherent in the conventional plastic plastic tube without causing breakage or water leakage.

  FIG. 2 schematically shows an assembly structure of the plastic plastic tube 1 and the bush ring insertion type pressure transport rubber ring 2 according to the present invention. As described above, when the fitted male pipe end 3 is to be fitted into the plastic plastic pipe 1 according to the present invention, the joint lip portion 11 of the plastic plastic pipe 1 has a conical shape. The outer diameter is large and the inner diameter is small, and the tube diameter portion 12 beyond the portion where the bush ring-inserting type pressure transport rubber ring 2 is provided has an inverted conical shape. Since the end diameter is small and the inner end diameter is large, the allowable bending angle of the pipe joint (see α angle shown in FIG. 5) is 3 times the allowable bending angle of the conventional plastic plastic tube. It can be increased up to 4 times. Here, the shape of the rubber ring 2 for pressure transportation of the bush ring insertion type is configured such that the outer peripheral edge thereof has a slope 4 and is in contact with the large arc circle 6. Are formed, and a small arc circle 5 in contact with the inclined surface 4 is formed at the front end of the inner peripheral edge, and the rear end is an arc curve formed by being surrounded by the large arc circle 6, and the small arc circle 5 and the large arc circle 6 are formed. In the arc curve, a concave middle step portion 14 is formed in the middle region so that the hard plastic bushing 7 is fitted and positioned.

  After being assembled in this manner, the joint lip portion 11 of the plastic plastic tube 1 has a conical shape, so that a gap 10 is formed between the joint lip portion 11 and the male tube end 3. After the rubber ring 2 for pressure transport with the bush ring insertion type and the plastic plastic tube 1 are assembled, a gap is also formed between the cutting angle 8 formed on the rubber ring 2 and the plastic plastic tube 1. Thus, the gap 9 is also formed between the recessed middle step portion 14 of the bush ring insertion type pressure transport rubber ring 2 and the male pipe end 3. Since the tube diameter portion 12 beyond the portion where the bush ring insertion type pressure transport rubber ring 2 is provided also has an inverted conical shape, a gap 13 is also formed between the male tube end 3.

  When the pipe material of the male pipe end 3 is fitted into the plastic plastic pipe 1, close contact is required by the two places of the small arc circle 5 and the large arc circle 6 of the rubber ring 2 for pressure transport that is fitted into the bush ring. Therefore, the effect of two-layer adhesion can be achieved. The volume that is pressed and deformed by the close contact between the small arc circle 5 and the large arc circle 6 of the bush ring insertion type pressure transport rubber ring 2 is constituted by the bush ring insertion type pressure transport rubber ring 2. It is possible to press and fill the interval of the cut angle 8 and the interval 9 formed between the recessed middle step portion 14 and the male tube end 3 in the bush ring insertion type pressure transport rubber ring 2. Therefore, it is possible to further improve the tightness of the fitting close contact of the bush ring insertion type pressure transport rubber ring 2.

  Further, as shown in FIG. 2, since the hollow middle step portion 14 in the bush ring insertion type pressure transport rubber ring 2 is provided with a hard plastic bush ring 7 for fitting and positioning, the bush ring insertion type pressure is provided. When the rigidity and strength of the transport rubber ring 2 are improved and the joining of the pipes is completed and actually used, the bush ring insertion type pressure transport rubber ring 2 is not moved by the applied water pressure, and the present invention is devised. It is possible to further improve the water tightness, water pressure strength, and impact resistance of the plastic tube according to the present invention, and it is possible to achieve the effect of adjusting the tightness of the plastic tube.

  The cross section of the hard plastic bush ring 7 fitted in the middle recess 14 in the bush ring insertion type pressure transport rubber ring 2 according to the present invention may be U-shaped as shown in FIG. 3A. As shown in FIG. 3B, it may have a semicircular shape, may have a circular shape as shown in FIG. 3C, may have a rectangular shape as shown in FIG. 3D, and has a square shape as shown in FIG. 3E. As shown in FIG. 3F, it may have a trapezoidal shape, or may have other shapes, and thus has an effect of improving the rigidity and strength of the bush ring-inserted pressure transport rubber ring 2. In addition, the watertightness, water pressure resistance, and impact resistance of the plastic tube according to the present invention can be further improved.

As described above, the present invention has the following merits.
(1) Since the plastic plastic tube has a cone-shaped lip portion, it is excellent in plasticity. Therefore, even when the terrain is curved, or when the formation is undulated or curved due to an earthquake, it still has good water tightness. , Water pressure strength and impact resistance can be maintained.
(2) The plastic plastic pipe structure according to the present invention can be easily and quickly fitted.
(3) The plastic plastic tube structure according to the present invention can absorb changes in the tube length due to thermal expansion and contraction.
(4) The plastic plastic pipe according to the present invention does not cause water leakage due to the release of the rubber ring structure for inserting a pressure ring into the bush ring even if the water pressure in the pipe is too high.
(5) Since the rigid plastic bush ring is fitted to the bush ring insertion type pressure transport rubber ring structure according to the present invention, the rigidity and strength of the bush ring insertion type pressure transport rubber ring can be improved, and the plastic plastic tube When assembled according to the above, a synergistic effect can be achieved, and a structure excellent in water tightness, water pressure resistance, and impact resistance can be obtained.

  As described above, it is clear that the plastic plastic pipe and the bush ring insertion type pressure transport rubber ring structure according to the present invention have patent requirements such as industrial applicability, novelty and inventive step. .

DESCRIPTION OF SYMBOLS 1 Plastic plastic pipe 2 Bush ring insertion type pressure transportation rubber ring 3 Male pipe end 4 Slope 5 Small arc circle 6 Large arc circle 7 Hard plastic bush ring 8 Cutting angle 9 Spacing 10 Spacing 11 Joint lip part 12 Diameter part 13 Spacing 14 Indented middle step 20 Pipe joint 30 of a conventional plastic plastic pipe 30 Lip portion 40 of a pipe joint of a conventional plastic plastic pipe Inner end diameter 50 Conventional rubber ring

Claims (1)

The tube wall cross section at the tip is formed into a two-stage V-shaped convex shape,
The insertion port of the lip is formed in a cone shape with a large outer end and a small inner end,
The tube diameter portion is formed in an inverted conical shape having a small outer end and a large inner end in a region adjacent to the region where the rubber ring is provided,
Plastic plastic characterized in that plastic plastic pipes are configured to be fitted to each other in order to improve the bending angle and the ease of fitting, and to be excellent in water tightness, water pressure strength, and impact resistance Tube structure.

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