A drain pipe

Abstract

The present invention discloses a drain pipe, which includes a plastic telescopic pipe and a stainless steel telescopic pipe. The plastic telescopic pipe is sleeved inside the stainless steel telescopic pipe. In this way, the plastic part of the drain pipe no longer bears large forces, and the metal part bears the forces, which can ensure the normal use of the drain pipe and improve the service life of the drainage pipe at the same time.

Description

Technical Field

[0001] The present invention relates to a drain pipe, and more specifically to a high-strength drain pipe. Background Art

[0002] In our life, especially in places such as bathrooms, kitchens or balconies, there are drain pipes for draining water. For the convenience of use, these drain pipes generally use telescopic pipes, and traditional telescopic pipes are made of plastic. When the plastic telescopic pipe is pulled and stressed, excessive local stress will cause it to turn white or even break, which will pose a potential risk of water leakage. Moreover, the pipe wall of the plastic telescopic pipe will burst under a certain pressure, directly resulting in water leakage. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a drain pipe.

[0004] The present invention is achieved through the following technical solutions:

[0005] A drain pipe includes a plastic telescopic pipe and a stainless steel telescopic pipe, and the plastic telescopic pipe is sleeved inside the stainless steel telescopic pipe.

[0006] In an embodiment of the present invention, it further includes a first joint. One end of the plastic telescopic pipe is sleeved on the outer peripheral wall of the first joint. A compression retaining ring is sleeved on the outer periphery of one end of the stainless steel telescopic pipe. The compression retaining ring cooperates with the first joint located inside the plastic telescopic pipe to connect and fix the plastic telescopic pipe, the stainless steel telescopic pipe and the first joint together.

[0007] In an embodiment of the present invention, the first joint is further provided with an annular boss, and an external thread is provided on the annular boss. A lock nut that cooperates with the external thread is arranged outside the first joint, and the compression retaining ring is located inside the lock nut.

[0008] In an embodiment of the present invention, the inner peripheral wall at the bottom of the lock nut is provided with a convex ring, and the compression retaining ring is located above the convex ring.

[0009] In an embodiment of the present invention, the plastic telescopic pipe includes a corrugated section and straight pipe sections located at the upper and lower ends of the corrugated pipe. An annular flange is provided at the end of one of the straight pipe sections, and the annular flange is located between the upper end face of the compression retaining ring and the lower end face of the annular boss.

[0010] In an embodiment of the present invention, it further includes a second joint. The other end of the plastic telescopic pipe is sleeved on the outer periphery of the first joint. A fixing ring is arranged on the outer periphery of the other end of the stainless steel telescopic pipe. The fixing ring cooperates with the second joint located inside the plastic telescopic pipe to connect and fix the plastic telescopic pipe, the stainless steel telescopic pipe and the second joint together.

[0011] In an embodiment of the present invention, an annular protrusion is provided in the middle of the second joint, and the lower end of the plastic telescopic pipe is located on the upper end surface of the annular protrusion.

[0012] In an embodiment of the present invention, a water stop ring that matches the inner peripheral wall of the plastic telescopic pipe is provided on the outer periphery of the second joint above the annular protrusion.

[0013] A drain pipe of the present invention has the following beneficial effects: 1. It has a structure with two layers of telescopic pipes, providing double protection and being safer; 2. The entire stress of the drain pipe is borne by the stainless steel telescopic pipe, making the tensile and compressive capacities of the drain pipe stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is an exploded view of the present invention.

[0016] Figure 2 It is a schematic diagram of the water inlet end of the plastic telescopic pipe and the stainless steel telescopic pipe of the present invention.

[0017] Figure 3 It is a schematic diagram of the water outlet end of the plastic telescopic pipe and the stainless steel telescopic pipe of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Referring to the accompanying drawings of the specification, a drain pipe includes a plastic telescopic pipe 10 and a stainless steel telescopic pipe 20, and the plastic telescopic pipe is sleeved inside the stainless steel telescopic pipe.

[0020] The connection structures of the water inlet and outlet ends of the plastic telescopic pipe and the stainless steel telescopic pipe will be described in detail below:

[0021] The connection structure of the water inlet end of the plastic telescopic pipe and the stainless steel telescopic pipe is as follows:

[0022] It further includes a first joint 30. One end of the plastic telescopic tube is sleeved on the outer peripheral wall of the first joint. An outer peripheral of one end of the stainless steel telescopic tube is sleeved with a compression snap ring 40. In one embodiment, the compression snap ring is a C-shaped ring, not a fully enclosed snap ring. The compression snap ring cooperates with the first joint located inside the plastic telescopic tube to couple and fix the plastic telescopic tube, the stainless steel telescopic tube and the first joint together. The first joint is further provided with an annular boss 31, and an external thread 32 is provided on the annular boss. An outer side of the first joint is provided with a lock nut 50 that is threadedly coupled with the external thread. The compression snap ring is located inside the lock nut. An inner peripheral wall at the bottom of the lock nut is provided with a convex ring 51, and the compression snap ring is located above the convex ring.

[0023] Specifically: The plastic telescopic tube includes a corrugated section 11 and straight tube sections 12 located at upper and lower ends of the corrugated tube. An annular flange 13 is provided at an end of one of the straight tube sections. The annular flange is located between an upper end face of the compression snap ring and a lower end face of the annular boss.

[0024] Furthermore, the connection structure of the water outlet ends of the plastic telescopic tube and the stainless steel telescopic tube is as follows:

[0025] It further includes a second joint 60. The other end of the plastic telescopic tube is sleeved on the outer periphery of the first joint. An outer periphery of the other end of the stainless steel telescopic tube is provided with a fixing ring 70. The fixing ring cooperates with the second joint located inside the plastic telescopic tube to couple and fix the plastic telescopic tube, the stainless steel telescopic tube and the second joint together. The second joint is provided with an annular protrusion 61 in the middle, and the lower end of the plastic telescopic tube is located on the upper end face of the annular protrusion. An outer periphery of the second joint above the annular protrusion is provided with a water stop ring 62 that cooperates with an inner peripheral wall of the plastic telescopic tube.

[0026] In the present invention: The perfect combination of the stainless steel telescopic tube and the plastic telescopic tube, with the inner tube being the plastic telescopic tube and the outer tube being the stainless steel telescopic tube; the upper ends of the stainless steel telescopic tube and the plastic telescopic tube are connected: The first joint is tightly fitted with the plastic telescopic tube, the first joint and the lock nut are threadedly connected, and a compression snap ring is sleeved inside. When the first joint and the lock nut are tightened more and more, the compression snap ring inside will tightly hold the plastic telescopic tube and the stainless steel telescopic tube; the lower end is the second joint tightly fitted with the plastic telescopic tube, and is pressed dead by the fixing ring. When the telescopic tube is stretched, both the inner plastic telescopic tube and the outer stainless steel telescopic tube can be telescoped. The telescopic amount of the inner plastic telescopic tube is larger than that of the outer stainless steel telescopic tube. When stretched to the limit, the force is borne by the outer stainless steel telescopic tube. The stainless steel has strong tensile strength, greatly enhancing the tensile capacity of the tube; when the water pressure inside the tube is too high, the inner plastic telescopic tube will expand and contact the outer stainless steel telescopic tube, and the force point acts on the stainless steel telescopic tube. The stainless steel telescopic tube has strong compressive capacity, greatly enhancing the compressive capacity of the tube.

[0027] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A drain pipe, characterized in that, It includes a plastic telescopic tube and a stainless steel telescopic tube, and the plastic telescopic tube is sleeved inside the stainless steel telescopic tube; it also includes a first joint, one end of the plastic telescopic tube is sleeved on the outer peripheral wall of the first joint, a compression snap ring is sleeved on the outer periphery of one end of the stainless steel telescopic tube, and the compression snap ring is cooperatively connected with the first joint located inside the plastic telescopic tube to fix the plastic telescopic tube, the stainless steel telescopic tube and the first joint together; an annular boss is further arranged on the first joint, an external thread is arranged on the annular boss, a lock nut that is cooperatively connected with the external thread is arranged outside the first joint, and the compression snap ring is located inside the lock nut; a convex ring is arranged on the inner peripheral wall at the bottom of the lock nut, the compression snap ring is located above the convex ring, and the compression snap ring is a C-shaped ring.

2. A drain pipe according to claim 1, characterized in that, The plastic telescopic tube includes a corrugated section and straight pipe sections located at the upper and lower ends of the corrugated pipe. An annular flange is arranged at the end of one of the straight pipe sections, and the annular flange is located between the upper end face of the compression snap ring and the lower end face of the annular boss.

3. A drain pipe according to any one of claims 1-2, characterized in that, It also includes a second joint, the other end of the plastic telescopic tube is sleeved on the outer periphery of the first joint, a fixing ring is arranged on the outer periphery of the other end of the stainless steel telescopic tube, and the fixing ring is cooperatively connected with the second joint located inside the plastic telescopic tube to fix the plastic telescopic tube, the stainless steel telescopic tube and the second joint together.

4. A drain pipe according to claim 3, characterized in that, An annular protrusion is arranged in the middle of the second joint, and the lower end of the plastic telescopic tube is located on the upper end face of the annular protrusion.

5. A drain pipe according to claim 4, characterized in that, A water stop ring that is matched with the inner peripheral wall of the plastic telescopic tube is arranged on the outer periphery of the second joint above the annular protrusion.

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