How to clean the pipes

Abstract

The present invention provides a pipeline cleaning method, comprising the following steps: A. a soluble cleaning device installation step, closing the pressure source of pipeline transportation, and the soluble cleaning device enters the pipeline from the front end of the pipeline through a sending device; B. a pipeline opening step, opening the pressure source, and the pressure pushes the soluble cleaning device forward; C. a pipeline cleaning step, the movement of the soluble cleaning device drives the accumulated liquid and dirt in the pipeline to move forward; D. a recovery step, the accumulated liquid and dirt in the pipeline, together with the soluble cleaning device, enter the waste liquid recovery device connected to the pipeline at a specific position of the pipeline under pressure. The beneficial effects of the present invention are high efficiency and environmental protection and energy saving.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning petrochemical transmission pipelines, and in particular relates to a soluble pipeline cleaning device. Background Art

[0002] In long-distance pipelines such as petrochemicals, the pipelines must be cleaned regularly to remove all kinds of residues in the pipelines to ensure smooth flow of the pipelines, thereby preventing the accumulation of debris in the pipeline medium from causing changes in the pipe diameter and affecting the transportation efficiency. Especially for newly built pipelines, since most of the debris during the construction process is not cleaned up, the pipelines must be cleaned before the pipelines are tested and operated.

[0003] At present, the ball-receiving and sending device is widely used in various medium conveying pipelines. It is generally installed at both ends of the main pipeline to launch and receive the pipe cleaner, pass the ball to sweep the line before the pipeline is put into production, and remove wax, oil, and scale after it is put into production. When using the ball-receiving and sending device to send and recover the cleaning ball, it is necessary to set up a ball-passing monitoring point to monitor the operation of the cleaning ball, and usually a detailed plan needs to be made for the pipeline. The steps of sending and recovering the cleaning ball are also quite cumbersome, and once the cleaning ball is stuck in the pipeline, it is usually necessary to apply reverse pressure to reversely recover the cleaning ball; the recovery process of the cleaning ball is also very cumbersome. Summary of the invention

[0004] The present invention does not solve the above problem, but provides a pipeline cleaning method which does not require a ball barrel to recover the cleaning ball, and can clean the pipeline under normal use after the ball is released, comprising the following steps:

[0005] A. The soluble cleaning device installation step includes closing the pressure source of the pipeline transmission, and the soluble cleaning device enters the pipeline from the front end of the pipeline through the sending device;

[0006] B. Pipeline opening step: Open the pressure source, and the pressure pushes the soluble cleaning device forward;

[0007] C. Pipe cleaning step: the movement of the soluble cleaning device drives the accumulated liquid and dirt in the pipeline to move forward;

[0008] D. Recovery step: the accumulated liquid and dirt in the pipeline, together with the soluble cleaning device, are pushed by pressure into the waste liquid recovery device connected to the pipeline at a specific position in the pipeline.

[0009] The present invention also provides a soluble cleaning device for a pipeline, comprising a soluble cleaning device body that can roll or slide in the pipeline under normal working pressure of the pipeline, the outer diameter of the soluble cleaning device body matches the inner diameter of the pipeline, and the soluble cleaning device body is made of a material that is soluble in water or a material that is soluble in the pipeline conveying medium.

[0010] As a further improvement of the embodiment of the present invention, the main body of the soluble cleaning device is any one of a spherical shape, a cylindrical shape, and a candied haws shape with multiple spheres connected together.

[0011] As a further improvement of the embodiment of the present invention, the soluble cleaning device includes a plurality of soluble cleaning device bodies connected to each other, and the connecting device is also made of a material soluble in water or a material soluble in a pipeline transport medium.

[0012] As a further improvement of the embodiment of the present invention, the main body of the soluble cleaning device is hollow inside.

[0013] As a further improvement of the embodiment of the present invention, the soluble cleaning device body is composed of a plurality of fixedly connected internally hollow soluble cleaning device bodies.

[0014] As a further improvement of the embodiment of the present invention, the main body of the soluble cleaning device is composed of a plurality of plug-in components that cooperate with each other.

[0015] As a further improvement of the implementation manner of the present invention, the plug-in component is a combination of one or more structures similar to Lego blocks, mortise and tenon structures, and plug-in structures.

[0016] As a further improvement of the embodiment of the present invention, the outer surface of the soluble cleaning device body in contact with the inner wall of the pipeline is also provided with a wear-resistant layer, and the wear-resistant layer is also made of a material soluble in water or a material soluble in the pipeline conveying medium.

[0017] As a further improvement of the embodiment of the present invention, an elastic or flexible extension portion is further provided between the wear-resistant layer and the soluble cleaning device body, and the extension portion forms an angle with a tangent line of the outer surface of the cleaning device body, and the angle is 0-90 degrees.

[0018] The advantages and positive effects of the present invention are:

[0019] (1) The soluble cleaning device does not need to be removed. The soluble cleaning device can be dissolved in water or the medium transported by the pipeline. It can clean the stored liquid in the pipeline in a very short time and achieve cleaning when the pipeline is in normal use, thereby improving production efficiency.

[0020] (2) It replaces the original method of using chemical agents for pipeline cleaning, which can achieve environmental protection and energy saving.

[0021] (3) The present invention also has a function to overcome the existing methanol solution to pipeline freezing and blockage defects: in winter, when the pipeline has been frozen and blocked, the flow rate of the pipeline is greatly reduced. After the pipeline is frozen and blocked, methanol is added to the pipeline upstream to remove the blockage. If the amount of methanol injected is not large enough, because the flow rate in the pipeline is already low, coupled with the ups and downs of the pipeline (a lot of methanol is gathered in the low-lying areas of the pipeline, the flow rate of the pipeline is reduced, and it is difficult to carry the methanol in the low-lying areas to the freezing point.) In view of this situation, after injecting some methanol, a cleaning device is sent into the pipeline, the pressure source is turned on, and the soluble cleaning device pushes the methanol forward to the freezing point, thereby achieving the purpose of unblocking and saving the amount of methanol injected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a structural cross-sectional view of a soluble cleaning device for a pipeline of the present invention;

[0024] In the figure, there is a hollow part 1, a wear-resistant layer 2, and an extension part 3. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0026] In various drawings of the present application, for the convenience of illustration, some sizes of structures or parts are exaggerated relative to other structures or parts, and thus, are only used to illustrate the basic structure of the subject matter of the present application.

[0027] In addition, terms such as "upper", "above", "lower", "below", etc. used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. Terms of spatial relative position may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings. For example, if the device in the figure is turned over, the unit described as being "below" or "beneath" other units or features will be located "above" the other units or features. Therefore, the exemplary term "below" can encompass both the above and below orientations. The device may be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptors used herein shall be interpreted accordingly.

[0028] Example 1

[0029] The present invention relates to a pipeline cleaning method, including the steps of installing the main body of a soluble cleaning device, closing the pipeline pressure source, and the step of the soluble cleaning device entering the pipeline from the front end of the pipeline pressure source through a sending device; the step of opening the pipeline, opening the pipeline pressure source, and pushing the soluble cleaning device forward; the step of cleaning the pipeline, because of the entry of the pressure source fluid pressure or gas pressure, a pressure difference is generated on both sides of the soluble cleaning device, and the soluble cleaning device is pushed to move by the pressure difference on both sides of the main body of the soluble cleaning device, and the water-containing liquid or impurities or dirt in the pipeline are pushed into a waste liquid recovery device connected to the pipeline at a specific position of the pipeline together with the soluble cleaning device. The main body of the soluble cleaning device is made of a material soluble in water or a material soluble in a pipeline conveying medium. After the pipeline cleaning is completed, the soluble cleaning device does not need to be taken out, and there is no need to set a ball barrel at the other end of the pipeline for recovery.

[0030] Example 2

[0031] like Figure 1 As shown, the present invention relates to a soluble cleaning device for a pipeline, comprising a soluble cleaning device body that can roll or slide in the pipeline under normal working pressure of the pipeline, the outer diameter of the soluble cleaning device body matches the inner diameter of the pipeline, and the soluble cleaning device body is made of a material that is soluble in water or a material that is soluble in a pipeline conveying medium. The soluble cleaning device body can be spherical, cylindrical or similar to a candied haws. The soluble cleaning device body includes a plurality of soluble cleaning device bodies that are connected to each other, and the connecting device is also made of a material that is soluble in water or a material that is soluble in a pipeline conveying medium. The soluble cleaning device body is hollow inside. The soluble cleaning device body is composed of a plurality of soluble cleaning device bodies of different sizes that are fixedly connected and hollow inside. The soluble cleaning device body is composed of a plurality of plug-in structures that cooperate with each other. The plug-in structure is a combination of one or more structures similar to Lego blocks, mortise and tenon structures, and plug-in structures. The outer diameter of the soluble cleaning device body is also provided with a wear-resistant layer, which is also made of a material soluble in water or a material soluble in the pipeline conveying medium. An elastic or flexible extension is also provided between the wear-resistant layer and the soluble cleaning device body, and the extension forms an angle with the tangent line of the outer surface of the cleaning device body, and the angle is 0-90 degrees.

[0032] In view of the fact that the soluble cleaning device body takes a long time to dissolve in water and pipeline transport media, it is preferred to use a hollow spherical or cylindrical soluble cleaning device body, which is a spherical or cylindrical body with a hollow interior, and a reinforcing structure is also provided inside the soluble cleaning device body. This not only does not reduce the pressure-bearing and sealing effects of the soluble cleaning device body, but also solves the problem of the long dissolution or degradation time of the soluble cleaning device body. Because a spherical or cylindrical soluble cleaning device body is used, the structural strength of the soluble cleaning device body is obviously insufficient for pipelines with larger diameters. In order to strengthen the structural strength of the soluble cleaning device body, a reinforcing structure may be added inside the soluble cleaning device body, such as reinforcing ribs or an internally stuffed plate-like structure. However, in order to speed up the dissolution or degradation time of the soluble cleaning device body, spoke-type reinforcing ribs are preferably used. It is radially arranged from the middle part of the center of the main body of the soluble cleaning device and connected to the inner surface of the main body of the soluble cleaning device, which not only solves the problem of dissolution or degradation time, but also solves the problem of structural strength.

[0033] The reinforcing structure is a plurality of spoke-like reinforcing ribs, which are assembled from a plurality of reinforcing rib separate parts provided with plug-in structures. The reinforcing ribs and the inner surface of the main body of the soluble cleaning device are also provided with mutually matching plug-in structures.

[0034] The reinforcing rib is arranged along the inner diameter direction of the main body of the soluble cleaning device, and the other end of the reinforcing rib is connected to the middle part, and the middle part is cylindrical or spherical with the same center as the main body of the soluble cleaning device.

[0035] The middle part is hollow inside a sphere or a cylinder, and the middle part is assembled from a plurality of middle part body parts provided with plug-in structures, and the outer surface of the middle part and the reinforcing ribs are also respectively provided with plug-in structures that cooperate with each other.

[0036] The plug-in structure is a combination of one or more structures such as Lego blocks, mortise and tenon structures, and plug-in structures.

[0037] The extension portion forms an angle with the axial direction of the soluble cleaning device body, and the angle is 0-90 degrees.

[0038] The extension parts are arranged at intervals, and one extension part is arranged for every other separate part of the soluble cleaning device main body.

[0039] The extension portion extends radially along the main body of the soluble cleaning device and then extends outwardly in a direction forming a certain angle along the generatrix of the main body of the soluble cleaning device.

[0040] In order to enhance the wear resistance of the soluble cleaning device body, a soluble wear-resistant layer is usually provided on the outer surface of the soluble cleaning device body, the surface in contact with the inner diameter of the pipeline, before use to increase the wear resistance of the device moving in the pipeline and rubbing against the pipe wall.

[0041] A flexible or elastic extension composed of a plurality of annular protrusion structures is provided between the main body of the soluble cleaning device and the wear-resistant layer. The angle formed by the flexible or elastic extension and the tangent of the outer surface of the main body of the soluble cleaning device is greater than 0 degrees and less than 90 degrees. The outer wall of the main body of the soluble cleaning device is flexible or elastic and has multiple layers of sloped barbs of different heights. The protruding part of this section forms a shape similar to a truncated cone together with the main body of the soluble cleaning device. The sloped barbs are pushed into the pipeline in the forward direction, and are pushed backward in the reverse direction when the pressure difference in the pipeline is too low or the pressure is pushed upward to generate pressure to push the main body of the soluble cleaning device to retreat. Under normal use, when the wear-resistant layer is reduced due to friction with the pipeline, the flexible or elastic extension will generate a radial outward pressure on the wear-resistant layer, so that the wear-resistant layer can maintain contact with the inner wall of the pipeline. Similarly, when the wear-resistant layer disappears due to use, a certain pressure and sealing performance in the pipeline can still be maintained.

[0042] The use of the soluble cleaning device body in the process of pipeline cleaning is specifically performed in the following steps: the pipeline ball barrel or tee is directly issued to open the pressure source of the pipeline, thereby pushing the soluble cleaning device body forward. When there are two soluble cleaning device bodies, the front soluble cleaning device body is used to bear force and clean the pipeline, pulling the rear soluble cleaning device body. The friction between the front soluble cleaning device body and the pipeline is greater than that of the rear soluble cleaning device body. While the front soluble cleaning device body moves forward, it rotates with the pipe wall to achieve the purpose of removing the scale and impurities in the pipeline. The distance between the front and rear soluble cleaning device bodies determines the length of the blocking section. The soluble cleaning device body is pushed into the waste liquid recovery device by pressure to complete the cleaning. The soluble cleaning device body is dissolved or degraded in the waste liquid recovery device and does not need to be taken out. The waste liquid recovery device is usually a waste liquid tank connected to the pipeline. Furthermore, the waste liquid tank is connected to the pipeline through a valve, and the valve is opened during cleaning and closed after cleaning. The valve controls the connection between the waste liquid recovery device - the waste liquid tank and the pipeline, so that the waste liquid can be recovered and processed under normal pressure transportation in the pipeline. The cleaning effect can be judged by the amount of recovered liquid collected by the waste liquid recovery device, and whether it needs to be cleaned again.

[0043] In order to allow the cleaning device body to enter the waste liquid recovery device more accurately and smoothly, a magnetic device that can cooperate with each other is installed inside the cleaning device body and at the designated waste liquid recovery device to guide the cleaning device body for accurate recovery.

[0044] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

[0045] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0046] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A soluble cleaning device for a pipeline, characterized in that: It includes a soluble cleaning device body that can roll or slide in the pipeline under normal working pressure of the pipeline, the outer diameter of the soluble cleaning device body matches the inner diameter of the pipeline, the soluble cleaning device body is made of a material that is soluble in water or a material that is soluble in the pipeline conveying medium, the soluble cleaning device body is hollow inside, and the soluble cleaning device body is composed of a plurality of mutually matching plug-in components, and a reinforcement structure is also arranged inside the soluble cleaning device body, and the reinforcement structure is a spoke-type reinforcement rib; The soluble cleaning device comprises a plurality of soluble cleaning device bodies connected by a connecting device, and the connecting device is also made of a material soluble in water or a material soluble in a pipeline conveying medium; The outer surface of the soluble cleaning device body in contact with the inner wall of the pipeline is also provided with a wear-resistant layer, and the wear-resistant layer is also made of a material soluble in water or a material soluble in the pipeline conveying medium; The main body of the soluble cleaning device is spherical or cylindrical with a hollow interior, the reinforcing rib is assembled from a plurality of reinforcing rib separate parts provided with a plug-in structure, the reinforcing rib and the inner surface of the main body of the soluble cleaning device are also provided with a plug-in structure that matches each other, the other end of the reinforcing rib is connected to the middle part, the middle part is cylindrical or spherical with the same center as the main body of the soluble cleaning device, the middle part is assembled from a plurality of middle part separate parts provided with a plug-in structure, and the outer surface of the middle part and the reinforcing rib are also respectively provided with a plug-in structure that matches each other; A flexible or elastic extension composed of a plurality of annular protrusion structures is arranged between the soluble cleaning device body and the wear-resistant layer. The flexible or elastic extension forms an angle greater than 0 degrees and less than 90 degrees with the tangent of the outer surface of the soluble cleaning device body. The outer wall of the soluble cleaning device body is flexible or elastic and has multiple layers of sloped barbs of different heights.

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