Heat supply pipeline on-line first-aid repair leaking stoppage device and leaking stoppage method

Abstract

The invention provides a heat supply pipeline online first-aid repair leaking stoppage device and method. The leaking stoppage device comprises a leaking stoppage pipe, a circular steel plate and a drainage pipe. The method comprises the following steps that a pipeline with the outer diameter larger than that of a leakage pipeline is selected as a leaking stoppage pipe, the leaking stoppage pipe is cut according to the length of a leakage point, round steel plates are welded to the front end and the rear end of the cut leaking stoppage pipe in a sealed mode respectively, through holes are formed in the centers of the round steel plates at the two ends in a cutting mode, and the through holes just penetrate through the leakage pipeline; the leaking stoppage pipe is cut into two semi-cylindrical plates, and one of the semi-cylindrical plates is selected for installing a drainage pipe; and the two semi-cylindrical plates are buckled at the leakage point, spot welding butt joint is conducted firstly, the water escape valve is opened, sealing welding is conducted while water escape is conducted, and the water escape valve is closed after welding is completed. According to the invention, plugging can be carried out on the heat supply pipeline without stopping heating, water resources are saved, and indexes of water consumption, heat consumption, power consumption and the like of heat supply are reduced. Safety risks are reduced, and maintenance efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline maintenance, and in particular to an online emergency repair and plugging device for a heating pipeline and a plugging method. Background Art

[0002] At present, the pipes used in the heating network in old urban areas are prefabricated direct-buried insulated steel pipes. The hot water in the pipes contains impurities such as chlorine to varying degrees, which causes a certain degree of corrosion to the metal pipe wall. With the increase in service life, the pipes begin to leak under a certain pressure. However, when a leak occurs in the heating pipeline, if maintenance is required, it is necessary to shut down and drain all the hot water before proceeding. The implementation of the shut-off and drain measures has a great impact, not only affecting the heating effect of heat users, but also posing safety hazards such as maintenance trench collapse and personnel scalding. In addition, large amounts of water discharge cause an increase in water consumption, heat consumption, and electricity consumption, reducing the economic benefits of heating companies. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the embodiment of the present invention provides an online emergency repair and plugging device and plugging method for a heating pipeline, which can plug the leakage of the heating pipeline without stopping the heating, thereby improving the maintenance efficiency.

[0004] An embodiment of the present invention provides a method for online repair and plugging of a heating pipeline, comprising the following steps:

[0005] S1, select a pipe with a larger outer diameter than the leaking pipe as a plugging pipe, cut the plugging pipe according to the length of the leaking point so that the plugging pipe completely covers the leaking point, seal and weld the front and rear ends of the cut plugging pipe with circular steel plates to form a closed cylindrical pipe fitting, use a cutting device to cut holes in the center of the circular steel plates at both ends so that the hole diameter just passes through the leaking pipe, cut the cylindrical pipe fitting into two semi-cylindrical plates with the same structure along the axial direction of the cylindrical pipe fitting, select one of the semi-cylindrical plates to install a drain pipe, and install a drain valve at the drain pipe;

[0006] S2, removing the insulation layer wrapped around the leaking pipe at the leaking point;

[0007] S3, fasten the two semi-cylindrical plates at the leakage point, first perform spot welding, open the drain valve to drain water, and then seal and weld the semi-cylindrical plates and the leaking pipe while draining water to form a leak-proof structure;

[0008] S4, after the sealing welding is completed, close the drain valve and cover the outside of the leak-proof structure with an insulation layer.

[0009] In some embodiments, in step S2, at least 10 cm of insulation layer is removed on both sides of the leakage point to meet welding conditions.

[0010] In some embodiments, the plugging pipe is two gauges larger than the leaking pipe.

[0011] In some embodiments, the thickness of the circular steel plate, the wall thickness of the plugging pipe and the wall thickness of the leaking pipe are all equal.

[0012] In some embodiments, the drain valve is a DN80 flange gate valve.

[0013] In some embodiments, in step S1, before cutting the cylindrical tube, a cutting line is drawn on the cylindrical tube with a ruler and a carbon pen to prevent deviation in cutting.

[0014] In some embodiments, in step S1, before installing the drain pipe, a drain hole is first opened on the semi-cylindrical plate, the diameter of the drain hole is less than or equal to the outer diameter of the drain pipe, and then the connection between the drain pipe and the semi-cylindrical plate is sealed and welded.

[0015] In some embodiments, the drainage pipe, the plugging pipe and the leaking pipe are made of the same material.

[0016] In some embodiments, the insulation layer is a polyethylene outer sheathed polyurethane insulation layer.

[0017] On the other hand, an embodiment of the present invention provides an online emergency repair and plugging device for a heating pipeline, comprising: a plugging pipe, a circular steel plate and a drain pipe, the plugging pipe comprising two semi-cylindrical plates that are interlocked with each other, one of the semi-circular plates being provided with a drain hole, and the two semi-cylindrical plates in use are sealed and welded after covering the leakage point of the heating pipeline; two circular steel plates are provided, and the two circular steel plates are seal-welded at both ends of the plugging pipe, a through hole is provided in the center of the circular steel plate, the diameter of the through hole is equivalent to the outer diameter of the leaking pipeline, and the material of the circular steel plate is the same as that of the plugging pipe; the drain pipe is seal-welded to the drain hole, and a drain valve is connected to the drain pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0019] in:

[0020] Figure 1 It is a flow chart of the method for online emergency repair and plugging of leakage in a heating pipeline in an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of an online emergency repair and plugging device for a heating pipeline in an embodiment of the present invention;

[0022] Reference numerals:

[0023] 1. Round steel plate; 2. Leakage-proof pipe; 3. Leakage pipe; 4. Drain pipe; 5. Drain valve. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] The following describes an online emergency repair and plugging device and a plugging method for a heating pipeline according to an embodiment of the present invention with reference to the accompanying drawings.

[0026] like Figure 1 As shown, an embodiment of the present invention provides an online repair and plugging method for a heating pipeline, comprising the following steps:

[0027] S1, select a pipe with a larger outer diameter than the leaking pipe 3 as the plugging pipe 2, cut the plugging pipe 2 according to the length of the leaking point so that the plugging pipe 2 completely covers the leaking point, seal and weld the front and rear ends of the cut plugging pipe 2 with circular steel plates 1 to form a closed cylindrical pipe fitting, use a cutting device to cut holes in the center of the circular steel plates 1 at both ends so that the hole diameter just passes through the leaking pipe 3, cut the cylindrical pipe fitting into two semi-cylindrical plates with the same structure along the axial direction of the cylindrical pipe fitting, select one of the semi-cylindrical plates to install the drain pipe 4, and install a drain valve 5 at the drain pipe 4;

[0028] S2, removing the insulation layer wrapped around the leaking pipe 3 where the leaking point is located;

[0029] S3, fasten the two semi-cylindrical plates at the leakage point, first perform spot welding, open the drain valve 5, drain the water, and then seal and weld the semi-cylindrical plates and the leaking pipe 3 while draining the water to form a leak-proof structure;

[0030] S4, after the sealing welding is completed, the drain valve 5 is closed and the outer side of the leak-proof structure is covered with an insulation layer.

[0031] The embodiment of the present invention can achieve leak plugging of the heating pipeline without stopping the heating, and there is no need to stop the water supply pump and the circulation pump, and there is no need to release the medium hot water of the pipe network system, thereby saving water resources and reducing the water consumption, heat consumption, electricity consumption and other indicators of heating. It reduces the safety risks such as trench collapse and scalding of personnel. It improves the maintenance efficiency, saves time, reduces the water loss caused by leakage of the heating pipeline, and reduces economic losses. It improves the heating effect without affecting the heating experience of heat users. In addition, the trench working pit is smaller, thereby reducing pollution and damage to the environment. It extends the service life of the heating pipeline.

[0032] The plugging method of the embodiment of the present invention is applicable to heating pipes with a pipe diameter range of DN100-1200mm.

[0033] In some embodiments, in step S2, at least 10 cm of insulation layer is removed on both sides of the leakage point to meet welding conditions.

[0034] In some embodiments, the plugging pipe 2 is two sizes larger than the leaking pipe 3. For example, if the size of the leaking pipe 3 is φ219, the size of the plugging pipe 2 should be φ325 to cover the leaking point on the heating pipe.

[0035] In some embodiments, the thickness of the circular steel plate 1 , the wall thickness of the leak-proof pipe 2 , and the wall thickness of the leaking pipe 3 are all equal.

[0036] In some embodiments, the drain valve 5 is a DN80 flange gate valve.

[0037] In some embodiments, in step S1, a cutting line is drawn on the cylindrical tube with a ruler and a carbon pen before cutting to prevent deviation in cutting.

[0038] In some embodiments, in step S1, before installing the drain pipe 4, a drainage hole is first opened on the semi-cylindrical plate, the diameter of the drainage hole is less than or equal to the outer diameter of the drain pipe 4, and then the connection between the drain pipe 4 and the semi-cylindrical plate is sealed and welded.

[0039] In some embodiments, the drainage pipe 4 , the plugging pipe 2 , and the leaking pipe 3 are made of the same material.

[0040] In some embodiments, the insulation layer is a polyethylene outer sheathed polyurethane insulation layer.

[0041] like Figure 2 As shown, another embodiment of the present invention proposes an online emergency repair and plugging device for a heating pipeline, comprising: a plugging pipe 2, a circular steel plate 1 and a drain pipe 4, wherein the plugging pipe 2 comprises two semi-cylindrical plates that are interlocked with each other, one of which is provided with a drain hole, and the two semi-cylindrical plates in use cover the leakage point of the heating pipeline and are then sealed and welded; two circular steel plates 1 are provided, and the two circular steel plates 1 are seal-welded at both ends of the plugging pipe 2, a through hole is provided in the center of the circular steel plate 1, and the aperture of the through hole is equivalent to the outer diameter of the leaking pipe 3, and the material of the circular steel plate 1 is the same as that of the plugging pipe 2; the drain pipe 4 is seal-welded to the drain hole, and a drain valve 5 is connected to the drain pipe 4.

[0042] The embodiment of the present invention provides a leak-proof pipe 2, a circular steel plate 1 and a drain pipe 4, so that leaks in the heating pipe can be blocked without stopping the heating, and there is no need to stop the water supply pump and the circulation pump, and there is no need to release the medium hot water of the pipe network system, thereby saving water resources and reducing indicators such as water consumption, heat consumption, and electricity consumption of heating. Safety risks such as trench collapse and scalding of personnel are reduced. The maintenance efficiency is improved, time is saved, the water loss caused by leakage of the heating pipe is reduced, and economic losses are reduced. The heating effect is improved without affecting the heating experience of heat users. In addition, the trench working pit is smaller, thereby reducing pollution and damage to the environment. The service life of the heating pipe is extended.

[0043] The present invention is further described below through specific examples.

[0044] Example 1

[0045] A method for online repair and plugging of leaks in a heating pipeline comprises the following steps:

[0046] (1) If the size of the leaking pipe 3 is φ219, then select a φ325 pipe that is long enough, generally to cover the leaking point and to facilitate on-site welding. Use a circular steel plate 1 of equal wall thickness to seal and weld both ends of the φ325 pipe, then make a hole that can pass through the φ219 pipe, and then cut the whole into two to form two semi-cylindrical plates. Select one of the semi-cylindrical plates, weld a φ89 steel drain pipe 4 on one side of it, and install a DN80 flange gate valve on the drain pipe 4. At this point, the online repair and plugging device is completed.

[0047] (2) Remove the insulation layer at the leakage point of the φ219 pipe. The length is 20 cm longer than that of the φ325 pipe, which meets the welding conditions.

[0048] (3) Buckle the cut semi-cylindrical plate into two pieces onto the φ219 pipe and perform spot welding. At this time, open the DN80 gate valve to drain water to prevent water from filling the φ325 pipe and affecting welding.

[0049] (4) After the outer wall welding of the φ325 pipe and the φ219 pipe is completed, the DN80 drain valve 5 is closed and a polyethylene outer protective polyurethane insulation layer is used.

[0050] It takes 2 hours to make the online emergency repair and plugging device, 3 hours to install and weld, and actually 5 hours to complete the emergency repair task. If the previous method of draining the medium hot water is adopted, at least 35 tons of hot water in the 500-meter-long pipeline needs to be drained, which takes 3-4 hours. Replacing 1 meter of pipeline, cutting and welding takes about 3 hours, and it takes 2 hours to fill the pipeline with water, which actually takes 9 hours in total. Therefore, the use of this online heating pipeline emergency repair and plugging device can save half the time. The cost is the same.

[0051] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, the term "some embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments and features of the different embodiments described in this specification without contradiction.

[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for online repair and plugging of a heating pipeline, characterized in that: The steps include: S1, select a pipe with an outer diameter larger than that of the leaking pipe as a plugging pipe, cut the plugging pipe according to the length of the leaking point so that the plugging pipe completely covers the leaking point, seal and weld the front and rear ends of the cut plugging pipe with circular steel plates to form a closed cylindrical pipe fitting, use a cutting device to cut holes in the center of the circular steel plates at both ends so that the hole diameter just passes through the leaking pipe, cut the cylindrical pipe fitting into two semi-cylindrical plates with the same structure along the axial direction of the cylindrical pipe fitting, select one of the semi-cylindrical plates to install a drain pipe, and install a drain valve at the drain pipe; S2, removing the insulation layer wrapped around the leaking pipe at the leaking point; S3, buckling the two semi-cylindrical plates at the leakage point, first spot welding them, opening the drain valve to drain water, and then sealing and welding the semi-cylindrical plates and the leaking pipe while draining water to form a leak-proof structure; S4, after the sealing welding is completed, the drain valve is closed and a thermal insulation layer is coated on the outside of the leak-proof structure.

2. The method for online repair and plugging of a heating pipeline according to claim 1 is characterized in that: In step S2, at least 10 cm of insulation layer is removed on both sides of the leakage point to meet welding conditions.

3. The method for online repair and plugging of a heating pipeline according to claim 1 is characterized in that: The plugging pipe is two sizes larger than the leaking pipe.

4. The method for online repair and plugging of a heating pipeline according to claim 1 is characterized in that: The thickness of the circular steel plate, the wall thickness of the leak-proof pipe and the wall thickness of the leaking pipeline are all equal.

5. The method for online repair and plugging of leakage in heating pipeline according to claim 1, characterized in that: The drain valve is a DN80 flange gate valve.

6. The method for online repair and plugging of a heating pipeline according to claim 1, characterized in that: In step S1, before cutting the cylindrical tube, a cutting line is drawn on the cylindrical tube with a ruler and a carbon pen to prevent deviation in cutting.

7. The method for online repair and plugging of a heating pipeline according to claim 1, characterized in that: In step S1, before installing the drain pipe, a drain hole is first opened on the semi-cylindrical plate, the diameter of the drain hole is less than or equal to the outer diameter of the drain pipe, and then the connection between the drain pipe and the semi-cylindrical plate is sealed and welded.

8. The method for online repair and plugging of a heating pipeline according to claim 1, characterized in that: The drainage pipe, the leak-stopping pipe and the leaking pipe are all made of the same material.

9. The method for online repair and plugging of a heating pipeline according to claim 1, characterized in that: The thermal insulation layer is a polyethylene outer protective polyurethane thermal insulation layer.

10. An online repair and plugging device for a heating pipeline, characterized in that: include: A leak-proof pipe, the leak-proof pipe comprises two semi-cylindrical plates that are interlocked, one of which is provided with a drainage hole, and the two semi-cylindrical plates in use cover the leaking point of the heating pipe and are then sealed and welded; A circular steel plate, wherein two circular steel plates are provided, and the two circular steel plates are sealed and welded at both ends of the plugging pipe. A through hole is opened in the center of the circular steel plate, and the aperture of the through hole is equivalent to the outer diameter of the leaking pipe. The material of the circular steel plate is the same as that of the plugging pipe; A drain pipe is sealed and welded to the drain hole, and a drain valve is connected to the drain pipe.

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