CN1055044C - Continuous Feeding Coating Technology for Small Diameter Pipe Mortar Lining - Google Patents

Abstract

The present invention relates to a lining process for the inner wall of a pipeline, which belongs to a lining process for mortar of small-caliber pipes with the diameter of below 114 mm. The problem of difficulty in mortar lining of the original small-caliber pipe is solved. The method is characterized in that the feeding balls are drawn in the pipe by the aid of ropes connected with a plurality of feeding balls at intervals, mortar poured into a feeding hopper on a connecting pipe is brought into the pipe, the mortar is pre-coated on the pipe wall, and then a mortar layer coated on the inner wall of the pipe is uniformly coated and compacted by a centering applicator. The coating has the characteristics of convenience and practicability for the mortar lining of the small-caliber pipe, can be used for continuously coating a longer pipeline, and can be widely applied to pipeline lining construction in construction sites and factories.

Description

Continuous Feeding Coating Technology for Small Diameter Pipe Mortar Lining

The invention relates to a pipeline inner wall lining process, which belongs to the lining process of mortar for small-diameter pipes below φ114 mm.

At present, the pipelines used in oil fields generally need to be repaired in about 10 years. Otherwise, the pipelines will be perforated, leak oil, or even be scrapped, and the replacement of new pipelines will be expensive. Although pipeline repair mortar lining construction techniques include centrifugal sedimentation method, spraying method, and pneumatic back pressure extrusion coating method, the centrifugal sedimentation method is only suitable for the inner lining of medium-diameter pipes with a length of less than 20 meters, and cannot be used for lining old underground pipelines. Repair; the centrifugal spraying method is only suitable for the on-site lining after the medium and large diameter pipes above φ273mm are welded in place, because the sprayer cannot be sent into the small diameter pipe, it cannot be used for lining or repairing the small diameter pipeline; the pneumatic back pressure extrusion method is only It can be used for on-site mortar lining construction of medium-diameter pipes above φ114 mm. Due to the small diameter of the small-diameter pipeline section and insufficient back pressure, the mortar lining construction of small-diameter pipes cannot be realized.

The purpose of the present invention is to overcome above-mentioned deficiencies in the prior art and provide a kind of small-diameter pipe mortar lining continuous feeding coating process suitable for the construction of small-diameter pipe mortar lining below φ114 mm.

The purpose of the present invention can be achieved through the following technical proposals: clean the inner wall of the pipe, clean water, and fix the "horn-shaped" feeding hopper at one end of the pipe after derusting, and the front end of the rope connecting several feeding balls at intervals passes through the pipe, and the mortar is installed Into the feeding hopper, the rope moves forward, the feeding ball brings the mortar into the pipe to pre-coat on the inner wall of the pipe, and then the mortar is sucked into the pipe by the vacuum generated between the feeding ball and the feeding hopper and coated on the inner wall of the pipe through the feeding ball On the top, the centering applicator fixed at the end of the rope enters the pipe with the rope to spread and compact the mortar layer coated on the inner wall of the pipe.

Compared with the prior art, the present invention has the following advantages: since the present invention uses a feeding hopper to add mortar, the mortar is coated on the inner wall of the pipe through feeding balls with different diameters, and a feeding port can be opened for longer pipelines to continuously add mortar , to solve the small-diameter pipe mortar lining continuous coating technology.

Fig. 1 is a structural diagram of the utility model.

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the pipeline 2 to be repaired should use high-pressure water jets to clean the dirt on the inner wall of the pipe 2, use the air to send PIG to clean the sewage on the inner wall of the pipe, and then carry out sandblasting and derusting, and connect and fix the "ox horn" at the end of the pipe 2. "Feeding hopper 5, the front end of the traction rope 1 passes through the pipe 2 in advance, and the end of the rope 1 is connected with the pulling device. The rope 1 passes through the hole of the fixed ball 3, and finally the centering applicator 6 is fixed, and the evenly stirred mortar or cement is poured into the feeding hopper 5, and when the pulling device pulls the rope 1 to move forward, the feeding ball 3 is held together with the rope 1 The mortar is brought into the pipe 2, and at the same time, a vacuum is generated between the feeding ball 3 and the feeding hopper 5, and the mortar poured into the feeding hopper 5 is sucked into the pipe 2, and then the next feeding ball 3 brings the mortar into the pipe 2 Inside, the feeding ball 3 continues to move forward. When the mortar is sucked into the pipe 2, the mortar is pre-coated on the inner wall of the pipe 2. After passing through several feeding balls 3 for multiple times, the centering applicator finally Spread the pre-coated mortar layer evenly, and then compact it to form a designed mortar lining layer with uniform thickness. In order to reduce the traction force p, use the feeding balls 3 as little as possible (the distance between the feeding balls 3 is larger). If the pipeline to be lined is very long, several feeding ports 7 can be opened on the pipe 2. After the feeding coating, continue to add mortar from the feeding port 7 to carry out the feeding coating of the next section of pipe 2, so as to keep the feeding coating continuous and the mortar layer on the inner wall of the pipe continuous.

Feeding ball 3 diameter = pipe 2 inner diameter - 2 times the thickness to be lined

How much to feed depends on the pipe 2 specification (diameter, length), lining thickness, and its relationship is:

V＝(D-2& ₁ -& ₂ )*π*& ₂ *100

& ₁ - pipe wall thickness

& ₂ - lining thickness

D- pipe nominal diameter 100- length 100 meters

For newly laid small-diameter pipelines, this process method can also be used.

Claims (3)

1, a kind of continuous plastering process for mortar lining of small-bore pipe that relates to, should be with pipe (2) inwall snaking, clear water, rust cleaning, it is characterized in that: pipe (2) one ports are fixed " cattle horn shape " feed hopper (5), rope (1) front end that connects several feeding balls (3) passes pipe (2) at interval, the mortar feed hopper (5) of packing into, rope (1) moves forward, feeding ball (3) is being precoated in the mortar lead-in tube (2) on pipe (2) inwall, then by the vacuum that produces between feeding ball (3) and feed hopper (5) in the mortar suction pipe (2), be coated in pipe (2) inwall by feeding ball (3), rope (1) end fixed centering applicator (6) enters the screed that will be coated on pipe (2) inwall in the pipe (2) with rope (1) and smoothens, compacting.

2, continuous plastering process for mortar lining of small-bore pipe according to claim 1 is characterized in that: feeding ball (3) center has rope (1) to pass through the fixedly hole of ball (3).

3, continuous plastering process for mortar lining of small-bore pipe according to claim 1 is characterized in that: can have spout (7) on the pipe (2).