Metallurgical furnace water return pipe leak repairing device

Abstract

The utility model relates to the technical field of pipeline leak repairing, and provides a metallurgical furnace water return pipe leak repairing device which comprises a cylinder body sleeved on a pipeline, the cylinder body is formed by butting a first slip and a second slip which are connected through a bolt, and an elastic pressure arc plate is arranged on the inner wall of the first slip and / or the second slip. An elastic pressure arc plate is arranged in the first slip and / or the second slip, a sealing gasket making close contact with the pipeline leakage position is arranged in the elastic pressure arc plate, and an inner protruding block which abuts against the side end of the elastic pressure arc plate and the side end of the sealing gasket and is used for limiting circumferential extension of the elastic pressure arc plate and the sealing gasket is arranged at the position, on the inner wall of the butt joint seam, of the barrel. The sealing gasket is effectively attached to a pipeline leakage point, circumferential extension of the elastic pressing arc plate and the sealing gasket is physically blocked through the inner protruding block, and the elastic pressing arc plate and the sealing gasket are prevented from generating circumferential creep deformation due to the influence of high-temperature return water, and a sealing interface is prevented from loosening.

Description

Technical Field

[0001] This utility model relates to the field of pipeline leak repair technology, and more specifically, to a leak repair device for a metallurgical furnace return water pipe. Background Technology

[0002] In the metallurgical industry, a large amount of return water generated during the cooling of high-temperature equipment needs to be recycled through underground pipe networks. The currently prevalent gravity-fed underground return water pipeline layout, combining return water tanks, cooling towers, and underground pipe networks, utilizes terrain elevation differences to achieve non-powered transport, effectively reducing equipment investment and energy consumption. However, underground pipelines operate under complex conditions of high temperature, high humidity, and corrosive media for extended periods. The pipe walls are prone to thinning and even perforation due to electrochemical corrosion and water flow erosion, leading to return water leakage. This not only wastes water resources but also causes problems such as foundation settlement and safety hazards to surrounding structures.

[0003] Metallurgical furnace return water pipes are typically buried underground. When leaks occur, excavation is necessary to locate the leak. The high-temperature water accumulation and the irregular morphology of the corroded pipe walls within the confined working space after excavation make it difficult for conventional welding or sealing materials to adhere effectively. Therefore, it is difficult to use large leak repair equipment and leveling devices, and it is also difficult to quickly control the leak. Utility Model Content

[0004] The purpose of this invention is to provide a leak repair device for the return water pipe of a metallurgical furnace, which solves the problem that existing leak repair devices are difficult to effectively fit the leak point.

[0005] This utility model is achieved through the following technical solution: a leak repair device for a metallurgical furnace return water pipe, including a cylinder sleeved on the pipe, the cylinder being composed of a first clamp and a second clamp connected by bolts, the inner wall of the first clamp and / or the second clamp being provided with an elastic pressure arc plate, the elastic pressure arc plate being provided with a sealing gasket that is in close contact with the leak in the pipe, and the inner wall of the cylinder being provided with an inner protrusion that abuts against the side end of the elastic pressure arc plate and the sealing gasket to limit the circumferential extension of the elastic pressure arc plate and the sealing gasket.

[0006] Furthermore, a first groove is formed in the first and / or second clamps to abut against the end of the elastic pressure plate and limit the axial movement of the elastic pressure plate.

[0007] Furthermore, the elastic pressure plate is provided with several axially arranged first positioning strips at intervals along its outer circumference, and the bottom of the first slot is provided with a first positioning groove that cooperates with the first positioning strips.

[0008] Furthermore, the elastic pressure plate has a second groove that engages with the sealing gasket to limit its axial movement.

[0009] Furthermore, the sealing gasket is provided with several axially arranged second positioning strips at intervals along its outer circumference, and a second positioning groove that mates with the second positioning strips is provided in the second slot.

[0010] Furthermore, the first positioning groove and the second positioning groove are arranged in a staggered manner along the circumference.

[0011] Furthermore, the elastic arc-forming plate is made of thermoplastic polyurethane.

[0012] Furthermore, the sealing gasket is made of butyl rubber.

[0013] This utility model has at least the following advantages and beneficial effects: by sequentially setting an elastic pressure arc plate and a sealing gasket in the first slip and / or the second slip, the sealing gasket can effectively fit tightly against the pipeline leak point, and the inner protrusion is used to physically block the circumferential extension of the elastic pressure arc plate and the sealing gasket, preventing the elastic pressure arc plate and the sealing gasket from undergoing circumferential creep due to the influence of high temperature backwater, which would cause the sealing interface to loosen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0015] Figure 2 This is a cross-sectional view of a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the first or second slip in a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0017] Figure 4 This is a cross-sectional view of the first or second slip in a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the elastic arc-pressing plate in a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0019] Figure 6 This is a cross-sectional view of the elastic pressure plate in a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0020] Figure 7 This is a schematic diagram of the sealing gasket structure in a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 1 of this utility model.

[0021] Figure 8 This is a cross-sectional view of a leak repair device for a metallurgical furnace return water pipe provided in Embodiment 2 of this utility model.

[0022] Reference numerals: 1-cylinder, 10-first slot, 11-first slip, 12-second slip, 13-inner protrusion, 14-first positioning groove, 2-elastic pressure plate, 20-second slot, 21-first positioning strip, 22-second positioning groove, 3-sealing gasket, 31-second positioning strip. Detailed Implementation

[0023] The specific implementation method is described below with reference to the accompanying drawings.

[0024] Example 1

[0025] like Figures 1 to 7 As shown in the figure, this embodiment mainly discloses a leak repair device for a metallurgical furnace return water pipe, including a cylindrical body 1 sleeved on the pipe. The cylindrical body 1 is composed of a first clamp 11 and a second clamp 12 connected by bolts. The inner walls of the first clamp 11 and the second clamp 12 are provided with elastic pressure arc plates 2. The elastic pressure arc plates 2 are provided with sealing gaskets 3 that are in close contact with the leak in the pipe. The inner wall of the cylindrical body 1 at the joint is provided with an inner protrusion 13 that abuts against the side ends of the elastic pressure arc plates 2 and the sealing gaskets 3 to limit the circumferential extension of the elastic pressure arc plates 2 and the sealing gaskets 3. Specifically, the cylindrical body 1 adopts a split structure. The outer sides of the first clamp 11 and the second clamp 12 are provided with ear plates. The ear plates are provided with connecting holes for bolts to pass through. The first clamp 11 and the second clamp 12 can be hinged on one side to facilitate installation in a confined space. The inner protrusion 13 is integrally formed on the inner side of the joint end of the first clamp 11 and the second clamp 12, and the inner protrusion 13 is flush with the ear plates. The inner protrusion 13, acting as a circumferential stop, physically blocks the circumferential extension of the elastic arc-pressing plate 2 and the sealing gasket 3. Together with the bolt preload, it forms a three-dimensional constraint system, preventing circumferential creep of the elastic arc-pressing plate 2 and the sealing gasket 3 due to high-temperature backflow. This ensures the sealing gasket 3 remains tightly pressed against the pipe leak point, preventing loosening of the sealing interface due to water flow impact. This is particularly suitable for irregular surfaces of corroded pipes. Furthermore, when the pipe undergoes slight deformation due to temperature fluctuations or foundation settlement, the limiting design of the inner protrusion 13 allows the sealing gasket 3 to maintain a certain axial compression and rebound capacity while restricting circumferential sliding, achieving continuous contact between the sealing gasket 3 and the corroded pipe wall, thus improving the reliability of the seal. It should be noted that the inner curvature of the first slip 11 and the second slip 12 should be less than 180° and close to 180°, while the inner diameter of the sealing gasket 3 should match the outer diameter of the pipe. When the bolts of the first slip 11 and the second slip 12 are tightened, a continuous clamping force is ensured on the pipe, so that the elastic pressure plate 2 always has a pre-tightening force on the sealing gasket 3, so as to ensure that the sealing gasket 3 fits tightly against the outer wall of the pipe and covers the pipe leak.

[0026] Furthermore, in specific implementation, such as Figure 3 , Figure 4As shown, in the embodiment of this utility model, a first groove 10 is formed within the first clamping plate 11 and the second clamping plate 12, which abuts against the end of the elastic arc-pressing plate 2 to limit the axial movement of the elastic arc-pressing plate 2. Specifically, at room temperature, the elastic arc-pressing plate 2 and the first groove 10 are in a clearance fit; at high temperature, the elastic arc-pressing plate 2 and the first groove 10 are in an interference fit. This converts the axial shear force borne by the elastic arc-pressing plate 2 into compressive stress on the wall of the first groove 10, preventing the sealing layer from delaminating due to abrupt changes in the direction of force.

[0027] Furthermore, in specific implementation, such as Figures 3 to 6 As shown in the embodiment of this utility model, the elastic arc-pressing plate 2 is provided with a plurality of axially arranged first positioning strips 21 at intervals along its outer circumference, and the bottom of the first slot 10 is provided with a first positioning groove 14 that cooperates with the first positioning strips 21. Specifically, on the one hand, it facilitates the positioning and installation of the elastic arc-pressing plate 2 with the first slip 11 and the second slip 12; on the other hand, the first positioning strips 21 and the first positioning groove 14 cooperate to form a strip-groove engagement, which can dissipate vibration energy through the external first slip 11 and the second slip 12.

[0028] Furthermore, in specific implementation, such as Figure 5 , 6 As shown in the figure, the elastic arc-pressing plate 2 provided in this embodiment of the present invention has a second groove 20 that engages with the sealing gasket 3 to limit the axial movement of the sealing gasket 3. Specifically, the end of the sealing gasket 3 is stepped and engages with the wall of the second groove 20, so that the sealing gasket 3 is effectively limited within the elastic arc-pressing plate 2. In addition, the edges of the second groove 20 are rounded to eliminate stress concentration points and reduce wear and aging of the sealing gasket 3 edges.

[0029] Furthermore, in specific implementation, such as Figures 5 to 7 As shown in the embodiment of this utility model, the sealing gasket 3 is provided with a plurality of axially arranged second positioning strips 31 at intervals along its outer circumference, and a second positioning groove 22 that cooperates with the second positioning strips 31 is provided in the second slot 20. Specifically, on the one hand, it facilitates the positioning and installation of the sealing gasket 3 and the elastic arc-pressing plate 2; on the other hand, the second positioning strips 31 and the second positioning grooves 22 engage to form an integral unit, increasing the friction between them and preventing relative movement between the sealing gasket 3 and the elastic arc-pressing plate 2.

[0030] Furthermore, in specific implementation, such as Figure 2 As shown, the first positioning groove 14 and the second positioning groove 22 provided in this embodiment of the present invention are arranged in a circumferentially offset manner, which effectively reduces the impact of stress concentration.

[0031] Furthermore, in specific implementations, the elastic arc-pressing plate 2 provided in this embodiment of the present invention is made of thermoplastic polyurethane. This ensures that it will not become brittle or excessively softened in a high-temperature environment, allowing the elastic arc-pressing plate 2 to store elastic pre-tightening force under the fastening action of the first clamp 11 and the second clamp 12, thus tightly adhering the sealing gasket 3 to the pipe. In addition, the first clamp 11 and the second clamp 12 are made of steel, and the elastic arc-pressing plate 2 forms a stiffness gradient with the first clamp 11 and the second clamp 12, achieving a smooth stress transition.

[0032] Furthermore, in specific implementations, the sealing gasket 3 provided in this embodiment of the present invention is made of butyl rubber. It maintains sealing stability at high temperatures and also possesses good resistance to chemical corrosion.

[0033] Example 2

[0034] like Figure 8 As shown, in this embodiment, the main structure is completely the same as in Embodiment 1. The difference is that the inner wall of the first slip 11 or the second slip 12 is provided with an elastic arc-pressing plate 2, that is, the elastic arc-pressing plate 2 and the sealing gasket 3 are arranged on one side. This side is used for sealing and plugging, and the other side is used for cooperating force to ensure the stability of the seal.

Claims

1. A leak repair device for a metallurgical furnace return water pipe, characterized in that, The device includes a cylinder (1) fitted onto a pipe. The cylinder (1) is composed of a first slip (11) and a second slip (12) connected by bolts. An elastic arc-pressing plate (2) is provided on the inner wall of the first slip (11) and / or the second slip (12). A sealing gasket (3) is provided inside the elastic arc-pressing plate (2) to be in close contact with the leak in the pipe. An inner protrusion (13) is provided on the inner wall of the joint of the cylinder (1) to abut against the side of the elastic arc-pressing plate (2) and the sealing gasket (3) to limit the circumferential extension of the elastic arc-pressing plate (2) and the sealing gasket (3).

2. A metallurgical furnace water return pipe patching device according to claim 1, characterized in that, The first slip (11) and / or the second slip (12) have a first groove (10) that abuts against the end of the elastic arc plate (2) to limit the axial movement of the elastic arc plate (2).

3. A metallurgical furnace water return pipe patching device according to claim 2, characterized in that, The elastic pressure plate (2) is provided with a plurality of axially arranged first positioning strips (21) at intervals along the outer periphery, and the bottom of the first slot (10) is provided with a first positioning groove (14) that cooperates with the first positioning strips (21).

4. A metallurgical furnace water return pipe patching device according to claim 3, characterized in that, The elastic arc-pressing plate (2) has a second slot (20) that engages with the sealing gasket (3) to limit the axial movement of the sealing gasket (3).

5. A metallurgical furnace water return pipe patching device according to claim 4, wherein The sealing gasket (3) is provided with a plurality of axially arranged second positioning strips (31) at intervals along the outer circumference, and the second slot (20) is provided with a second positioning groove (22) that cooperates with the second positioning strips (31).

6. A metallurgical furnace water return pipe patching device according to claim 5, wherein The first positioning groove (14) and the second positioning groove (22) are arranged in a staggered manner along the circumference.

7. A metallurgical furnace water return pipe patching device according to claim 1, characterized in that, The elastic arc-pressing plate (2) is made of thermoplastic polyurethane.

8. A metallurgical furnace water return pipe patching device according to claim 1, characterized in that, The sealing gasket (3) is made of butyl rubber.

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