Method for normal conveying and plugging leakage after sewage micro-positive pressure pipeline point corrosion leakage

Abstract

The application discloses a method for plugging a leakage of a sewage micro-positive pressure pipeline, and belongs to the technical field of pulp and paper sewage treatment supporting conveying pipe networks. The technical scheme is as follows: 1) a circular truncated cone wedge is made according to the size of a leakage point, and a clamping groove is arranged at the large head of the circular truncated cone wedge, wherein the clamping groove is formed by two groups of parallel clamping grooves; 2) the circular truncated cone wedge is embedded into the leakage point; and 3) a fixing wire is symmetrically fixed at the clamping groove along the cross section of the pipeline, the part of the fixing wire in contact with the clamping groove is wound with a raw material belt, and the end of the fixing wire is knotted and pasted with rubber. The part of the circular truncated cone wedge without the raw material belt is subjected to paint spraying treatment in the same color as the pipeline. The application can carry out the plugging operation without stopping production, thereby avoiding economic loss caused by production interruption; the plugging operation is carried out without discharging materials, thereby avoiding environmental problems and safety risks caused by material discharge during the plugging operation; the plugging operation is carried out without fire and mechanical knocking sparks, thereby avoiding safety accidents.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pulp and paper sewage treatment supporting conveying pipe network, and particularly relates to a method for normal conveying and leak plugging after point corrosion leakage of sewage micro-positive pressure pipeline. BACKGROUND

[0002] The material of the pulp and paper sewage treatment supporting conveying pipe network is mostly Q235 carbon steel. During use, due to the high water-soluble solids (DTS) in the conveying medium, such as resin, tannin, chlorophenol, organic sulfide, sulfate, hydrogen sulfide, methane, etc., point corrosion easily occurs to cause leakage. The pulp and paper sewage treatment also has the characteristics of large water quantity, short system buffer time, long system shutdown maintenance cycle, short time, etc., causing production interruption due to pipeline point corrosion, the need for fire operation, system discharge, low safety factor, long plugging time, and complex plugging process. Leakage environment impact and other problems have always been a difficult problem restricting normal and stable production. At present, the commonly used treatment schemes and methods for this problem are as follows: 1) system shutdown: pipeline is drained after emptying and water draining, and then repair welding is performed, which has the disadvantage of production interruption, causing production loss; 2) wedge plugging method: first, a material with high toughness is used to plug the hole, then a welded joint is used to fix the thread, nipple or high-strength nut (the welded joint does not directly participate in plugging), and then the plug or nut is tightened to achieve the plugging requirement, which has the disadvantage of high risk coefficient for flammable gas medium in the pipeline due to the need for fire treatment; 3) drainage method: the water flow at the leakage point is guided to a controllable path, the valve is in the open state to play a backflow role, then a pressure-resistant pipe is sleeved around the leakage point for welding, and after welding, the valve is closed to play a sealing role, which has the disadvantage of high risk coefficient for flammable gas medium in the pipeline due to the need for fire treatment, and the welding effect is not ideal if the drainage is not smooth; there is a risk of environmental damage due to a large amount of material leakage; 4) sticking method: a sealing agent is directly or indirectly plugged into the pipeline leakage to achieve sealing, which has the disadvantage of poor sealing effect and the risk of secondary leakage; 5) welding bag method: a leakage is welded in a metal cavity to achieve leakage treatment, which has the disadvantage of non-standard cavity that cannot be perfectly matched with the leakage plugging part, and the risk of secondary leakage after plugging; 6) caulking method: a tin solder or metal body around the leakage point is extruded by a punch to plug the leakage point, which has the disadvantage of high risk coefficient due to the need for tin soldering treatment, and the risk of secondary leakage at the leakage point after plugging; 7) clamp method: a clamp is used to clamp a sealing pad at the leakage point to achieve leakage treatment, which has the disadvantage of laborious operation, different stress at the plugging site and other sites, and high risk of leakage; 8) fixture method: different fixtures are selected according to the position of the leakage point, the sealing agent is injected into the sealing cavity at a pressure higher than the medium leakage after the fixture is installed at the leakage point, the sealing agent is quickly solidified to establish a new sealing structure, and the plugging purpose is achieved, which has the disadvantage of complex operation and the risk of secondary leakage after plugging. SUMMARY

[0003] The application provides a method for plugging a leakage of a sewage micro-positive pressure pipeline, and the method can be used for plugging the leakage without stopping production, avoiding economic loss caused by production interruption; the method can be used for plugging the leakage without discharging materials, avoiding environmental problems and safety risks caused by discharging materials during plugging; and the method can be used for plugging the leakage without fire and mechanical knocking, avoiding safety accidents.

[0004] The technical scheme of the application is as follows:

[0005] The method for plugging a leakage of a sewage micro-positive pressure pipeline comprises the following steps:

[0006] 1) A circular truncated cone-shaped wedge is made according to the size of the leakage point, and a clamping groove is arranged at the large head of the circular truncated cone-shaped wedge, wherein the clamping groove is formed by two groups of parallel clamping grooves;

[0007] 2) The circular truncated cone-shaped wedge is embedded into the leakage point;

[0008] 3) A fixed wire is symmetrically fixed at the clamping groove along the cross section of the pipeline, the part of the fixed wire in contact with the clamping groove is wound with a raw material belt, the end of the fixed wire is knotted and then pasted with rubber, and the part of the circular truncated cone-shaped wedge without the raw material belt is treated by spraying paint with the same color as the pipeline.

[0009] Preferably, the wedge is made of one of willow wood, elm wood and peach wood.

[0010] Preferably, the distance between the two clamping grooves in step 1) is the same as the diameter of the small head of the circular truncated cone-shaped wedge.

[0011] Preferably, the diameter of the large head of the circular truncated cone-shaped wedge is twice the diameter of the small head.

[0012] Preferably, the circular truncated cone-shaped wedge is vertically embedded into the leakage point by using a leather hammer in step 2).

[0013] Preferably, the fixed wire is a double-stranded 12# iron wire in step 3).

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] 1. The method can be used for plugging leakage without stopping production, so as to avoid economic loss caused by production interruption; 2. The stress point is directly on the wedge, the wedge is hit into the leakage point and the contact part of the pipeline, and there is friction, so that the wedge can basically bear the external pressure of the fluid, the external fixed wire can make the fixing more firm, the wedge will swell slightly when meeting water, and the pressure bearing capacity will be larger after swelling; 3. The method can be used for plugging leakage without discharging materials, so as to avoid environmental problems and safety risks caused by discharging materials during plugging work; 4. The method can be used for plugging leakage without fire and mechanical knocking sparks, so as to avoid safety accidents; 5. The method is rapid, simple and convenient, and the plugging time can be completed within half an hour, and the operation ability of personnel is not high; 6. The cost is low, the plugging tool and material are ordinary, and the cost is low or belongs to waste utilization; 7. The main body of the structure is made of natural wood and is processed by physical process, so that the increase of environmental pollution factors is not introduced or is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a structural schematic diagram of step 1) of the present application.

[0017] Fig. 2 is a structural schematic diagram of step 2) of the present application.

[0018] Fig. 3 is a structural schematic diagram of step 3) of the present application.

[0019] In the figure, 1 is a circular truncated wedge; 2 is a large head; 3 is a small head; 4 is a clamping groove; 5 is a leakage point; 6 is a fixed wire; and 7 is a pipeline. DETAILED DESCRIPTION EMBODIMENT

[0020] As shown in the figure, the embodiment provides a method for plugging leakage of a sewage micro-positive pressure pipeline, and specifically comprises the following steps: Figs. 1-3 1) A circular truncated wedge 1 is made according to the size of the leakage point 5, the circular truncated wedge 1 is made of willow wood, the diameter of the large head 2 of the circular truncated wedge 1 is twice the diameter of the small head 3, the large head 2 of the circular truncated wedge 1 is provided with a clamping groove 4, the depth of the clamping groove 4 is 4 mm, the clamping groove 4 is provided in parallel with two groups, and the distance between the two clamping grooves 4 is the same as the diameter of the small head 3 of the circular truncated wedge 1;

[0021] 2) The circular truncated wedge 1 is vertically embedded into the leakage point 5 by using a leather hammer, and the embedding depth ensures that the leakage point 5 does not leak material;

[0022] 3) The small head 3 of the circular truncated wedge 1 is fixed on the pipeline 7 by using a fixed wire 6, and the fixed wire 6 is fixed on the clamping groove 4 of the circular truncated wedge 1.

[0023] 3) with double 12# iron wire along the pipeline 7 cross section in the card slot 4 symmetrical fixed, double 12# iron wire with the card slot 4 contact part of the winding raw belt, double 12# iron wire end knot paste rubber, fixed after the round table wedge 1 no raw belt part with the pipeline 7 color uniform spray paint treatment, that is, the completion of the leakage pipeline 7 with pressure plugging.

[0024] Although the present application has been described in detail with reference to the preferred embodiments, the application is not limited to the preferred embodiments. Various equivalent modifications or replacements can be made to the embodiments of the present application by those skilled in the art without departing from the spirit and essence of the present application, and these modifications or replacements shall be within the scope of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A method for sealing leaks under normal conveyor belt pressure after pitting corrosion in a sewage micro-positive pressure pipeline, characterized in that, Includes the following steps: 1) Make a frustum-shaped wooden wedge (1) according to the size of the leak point (5). Set a groove (4) on the large end (2) of the frustum-shaped wooden wedge (1). The groove (4) consists of two sets arranged in parallel. 2) Insert the frustum-shaped wooden wedge (1) into the leak point (5); 3) Use fixing wire (6) to fix symmetrically at the groove (4) along the cross section of the pipe (7). Wrap the part of the fixing wire (6) that contacts the groove (4) with PTFE tape. Stick rubber at the knot at the end of the fixing wire (6). After fixing, the part of the frustum-shaped wooden wedge (1) without PTFE tape is painted with the same color as the pipe (7). In step 1), the distance between the two slots (4) is the same as the diameter of the small end (3) of the frustum-shaped wooden wedge (1); The diameter of the larger end (2) of the frustum-shaped wooden wedge (1) is twice the diameter of the smaller end (3); In step 3), the fixing wire (6) is a double-strand 12# iron wire.

2. The method for sealing leaks under pressure during normal transport after pitting corrosion in a sewage micro-positive pressure pipeline as described in claim 1, characterized in that, The wooden wedges are made of one of the following materials: willow, elm, and peach.

3. The method for sealing leaks under pressure during normal transport after pitting corrosion in a sewage micro-positive pressure pipeline as described in claim 1, characterized in that... In step 2), the frustum-shaped wooden wedge (1) is vertically embedded into the leak point (5) using a leather hammer.

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