Telescopic negative pressure drainage pipe

Abstract

The utility model belongs to the technical field of mine gas pumping and discharging, and particularly relates to a telescopic negative pressure pumping and discharging pipe which comprises a PVC pipe and a stainless steel pipe, the diameter of the PVC pipe is smaller than that of the stainless steel pipe, baffle rings are welded to the two ends of the stainless steel pipe, grooves are formed in the inner sides of the baffle rings, sealing rings are embedded in the grooves, the right end of the PVC pipe penetrates into the left end of the stainless steel pipe, and the right end of the stainless steel pipe penetrates into the right end of the PVC pipe. The right end of the stainless steel pipe is welded with an extension pipe, and the left end of the PVC pipe is fixedly connected with a flange. According to the drainage pipe, the characteristic that the outer wall of the PVC pipe is smooth is utilized, sliding is effortless, sealing and positioning are conducted through the two sealing rings, the sealing rings are not prone to falling off, the sealing performance is high, telescopic and fixing are achieved, cutting or welding according to the construction environment is not needed, using is convenient, and time and labor are saved; the thin-wall stainless steel pipe is combined, so that the whole weight is light and carrying is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mine gas pumping technical field especially relates to a telescopic negative pressure exhaust pipe. BACKGROUND

[0002] In the mining process, the gas in the mine layer will contact with the roof or floor of the mine layer, thereby forming gas accumulation, some of which are harmful to the body or prone to explosion accidents, and need to be discharged, usually using negative pressure exhaust pipe to extract the gas through the exhaust shaft at the bottom of the mine layer, reducing the possibility of harm to the body of the operating personnel or reducing the occurrence of explosion accidents, reducing the security risks. However, the position environment of installing negative pressure exhaust pipe is different in different gas pumping places, and the length of the required exhaust pipe is different, the existing negative pressure exhaust pipe needs to be cut or welded according to the construction environment during installation, and the length after cutting or welding may not be exactly suitable, which is inconvenient to use, time-consuming and laborious, and wastes materials. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a telescopic negative pressure exhaust pipe, solving the problem of inconvenient use, time-consuming and laborious of the existing negative pressure exhaust pipe when in use.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A telescopic negative pressure exhaust pipe, including PVC pipe and stainless steel pipe, the diameter of the PVC pipe is smaller than the diameter of the stainless steel pipe, the both ends of the stainless steel pipe are welded with a stop ring, the inner side of the stop ring is provided with a groove, and a sealing ring is embedded in the groove, the right end of the PVC pipe penetrates into the left end of the stainless steel pipe, the right end of the stainless steel pipe is welded with an extension pipe, and the left end of the PVC pipe is fixedly connected with a flange.

[0006] Preferably, the thickness of the pipe wall of the stainless steel pipe is 0.2mm-4mm.

[0007] Preferably, the material of the extension pipe is stainless steel.

[0008] Preferably, the diameter of the PVC pipe is 315mm, and the diameter of the stainless steel pipe and the extension pipe is 325mm.

[0009] Working principle: the left end of the PVC pipe is connected with a gas pipeline through a flange, the right end of the PVC pipe penetrates into the stainless steel pipe, the right end of the stainless steel pipe is welded with an extension pipe, and the sealing ring in the stop ring at the both ends of the stainless steel pipe seals and positions the PVC pipe, according to the length requirement of the negative pressure exhaust pipe in the gas pumping place, the PVC pipe is extracted or inserted to adjust flexibly.

[0010] The utility model has the advantages of:

[0011] (1) the smooth characteristics of the outer wall of the PVC pipe, sliding without effort, sealed and positioned by two sealing rings, the sealing ring is not easy to fall off, the sealing performance is strong, realizes the telescopic and fixed, without cutting or welding according to the construction environment, convenient to use, save time and effort;

[0012] (2) the PVC pipe is adopted, combined with the thin-walled stainless steel pipe, the overall quality is light and convenient to carry. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a structural schematic view of the embodiment of the utility model;

[0014] Fig. 2 is a connection relationship diagram of the PVC pipe and the stainless steel pipe in the embodiment of the utility model;

[0015] Fig. 3 is a connection relationship diagram of the stainless steel pipe and the extension pipe in the embodiment of the utility model.

[0016] Mark 1, PVC pipe; 2, stainless steel pipe; 3, baffle ring; 4, extension pipe; 5, flange. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model will be described clearly and completely in combination with the drawings and embodiments.

[0018] As shown in the drawing, Figs. 1-3 A telescopic negative pressure exhaust pipe, comprising a PVC pipe 1 and a stainless steel pipe 2, the diameter of the PVC pipe 1 is smaller than the diameter of the stainless steel pipe 2, the stainless steel pipe 2 is welded with a baffle ring 3 at both ends, the inner side of the baffle ring 3 is provided with a groove, the sealing ring is embedded in the groove, the right end of the PVC pipe 1 penetrates into the left end of the stainless steel pipe 2, the right end of the stainless steel pipe 2 is welded with an extension pipe 4, the material of the extension pipe 4 is stainless steel, the left end of the PVC pipe 1 is fixedly connected with a flange 5, the diameter of the PVC pipe 1 is 315mm, the diameter of the stainless steel pipe 2 and the extension pipe 4 is 325mm; the PVC pipe and the thin-walled stainless steel pipe are sleeved, the overall quality is light; the PVC pipe is sealed by the sealing ring, the two sealing rings play the positioning role, according to the construction site environment, the length of the negative pressure exhaust pipe is adjusted flexibly by pulling out or inserting the PVC pipe.

Claims

1. A retractable negative pressure suction tube, characterized by, The utility model provides PVC pipe and stainless steel pipe, the diameter of PVC pipe is less than the diameter of stainless steel pipe, the both ends of stainless steel pipe are welded with stop ring, the inner side of stop ring is equipped with recess, recess is inlayed with sealing ring, the right end of PVC pipe is inserted into the left end of stainless steel pipe, the right end of stainless steel pipe is welded with extension pipe, and the left end of PVC pipe is fixedly connected with flange.

2. A retractable negative pressure suction tube according to claim 1, wherein The thickness of the wall of the stainless steel pipe is 0.2mm-4mm.

3. A retractable negative pressure suction tube according to claim 1, wherein The material of the extension pipe is stainless steel.

4. A retractable negative pressure suction tube according to claim 3, wherein The diameter of the PVC pipe is 315mm, and the diameter of the stainless steel pipe and the extension pipe is 325mm.

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