Pipeline expansion dredging drainage tube

Abstract

The utility model discloses a pipeline expansion dredging drainage tube which comprises a catheter, the outer side of the catheter is fixedly connected with a rubber belt, the right side of the catheter is fixedly communicated with a connector, a drainage pipeline is arranged on the right side of the connector, a control valve is arranged on the drainage pipeline, a cavity is formed in the rubber belt, and the rubber belt is fixedly connected with the connector. The right side of the rubber belt communicates with an inflation pipe, and a first threaded layer is arranged on the outer wall of the inflation pipe. Through a series of scientific and reasonable structural designs of the guide pipe, the rubber belt, the drainage pipeline, the control valve, the safety valve and the like, the problem of existing under-pressure pipeline operation is solved, the operation efficiency and quality are improved, stable and safe operation of a pipeline system is ensured, and urgent requirements in actual engineering are met.

Description

Technical Field

[0001] This utility model relates to the technical field of heating pipeline maintenance devices, and in particular to a pipeline expansion drainage pipe. Background Technology

[0002] In the daily operation and maintenance of various pipeline systems, it is often necessary to replace parts of the pipeline or cut and re-weld valves to ensure the normal operation and functional optimization of the pipeline system. However, these operations face enormous challenges, especially in pressurized pipeline operation scenarios.

[0003] The traditional approach is to use a "window opening" method when encountering a linear flow of water with persistent pressure due to a valve not closing tightly, making welding impossible. This involves first blocking the initial section of the pipe, then using a pump to drain the water, and finally attempting welding. However, this method has several serious problems:

[0004] The construction is challenging and carries significant quality risks: the "skylight" method requires cutting the pipeline to create an opening. After repair, the skylight location must be re-welded, and this re-welding position is often very close to the normal weld joint. This greatly increases the complexity of the construction process and places stringent demands on the technical skills of the welders. Due to limited operating space and concentrated welding locations, the construction difficulty is significantly increased, and even slight carelessness can lead to welding defects, creating potential safety hazards such as leaks in future pipeline operations.

[0005] Construction process is easily affected: the water pressure in the pipeline is complex and variable. When the water pressure is too high, or the pump operation fails to keep up with the water pressure changes in time, the strong water pressure can easily break through the blockage.

[0006] Therefore, a new type of pipe expansion drainage tube needs to be designed to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a pipeline expansion and drainage pipe. Through a series of scientific and reasonable structural designs, including a conduit, rubber belt, drainage pipe, control valve, and safety valve, it solves the problems of existing pressurized pipeline operations, improves operational efficiency and quality, ensures the stable and safe operation of the pipeline system, and meets the urgent needs of practical engineering.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A duct expansion drainage tube includes a conduit, a rubber band fixedly connected to the outer side of the conduit, a connector fixedly connected to the right side of the conduit, a drainage pipe provided on the right side of the connector, a control valve provided on the drainage pipe, a cavity provided inside the rubber band, an inflation tube connected to the right side of the rubber band, and a first threaded layer provided on the outer wall of the inflation tube.

[0010] Preferably, the outer wall of the rubber strip has multiple horizontal lines, the rubber strip is made of EPDM rubber, and the thickness of the rubber strip is 15mm-20mm.

[0011] Preferably, a pressure relief branch pipe is connected to the drainage pipe, and a safety valve is installed on the pressure relief branch pipe.

[0012] Preferably, a pressure gauge is installed on the right side of the rubber belt.

[0013] Preferably, the outer wall of the drainage pipe is provided with a second thread layer, the inner wall of the connector is provided with an internal thread, the drainage pipe is threadedly connected to the connector, and a sealing ring is provided on the left inner wall of the connector.

[0014] Preferably, the control valve is a ball valve, and the control valve is made of stainless steel.

[0015] Compared with existing technologies, the advantages of this device are:

[0016] 1. Compared with existing technologies, this expansion drainage pipe does not require additional opening and cutting operations on the pipe. By installing this device inside the pipe, the rubber band is inflated and expands to form a seal against the inner wall of the pipe. The water flow can be drained by opening the control valve of the drainage pipe, which greatly simplifies the construction process and reduces the construction difficulty. Even welders with ordinary technical skills can easily complete welding and repair tasks.

[0017] 2. Compared with the existing technology, this device is equipped with a safety valve and a pressure relief branch pipe. When the pressure in the pipeline rises abnormally, the safety valve will automatically open to relieve pressure, ensuring that the pressure in the pipeline is within a controllable range. This avoids interference with welding operations due to pressure issues, ensures the stability of the construction process, effectively avoids repeated maintenance work, and greatly improves maintenance efficiency.

[0018] 3. Compared with the existing technology, the drainage pipe and the connector of this device are connected by threads, and a sealing ring is provided on the inner wall of the left side of the connector. This design ensures the stability of the connection and enhances the sealing performance, effectively preventing water leakage during the drainage process, providing a stable water-free environment for welding operations, and ensuring welding quality. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of a pipe expansion drainage pipe proposed in this utility model;

[0020] Figure 2 for Figure 1 A structural diagram from another perspective;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure after the middle connector is separated from the drainage pipe.

[0022] In the diagram: 1. Conduit, 2. Rubber band, 3. Inflation tube, 4. Connector, 5. Drainage pipe, 6. Safety valve, 7. Pressure relief branch pipe, 8. Control valve, 9. Pressure gauge. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-3A pipe expansion and drainage pipe includes a conduit 1, which serves as the core channel structure of the entire device. The conduit 1 is made of high-strength, corrosion-resistant metal to ensure long-term stable operation in complex pipe environments, providing a reliable channel for subsequent water or other media drainage. A rubber strip 2 is fixedly connected to the outside of the conduit 1. The outer wall of the rubber strip 2 has multiple horizontal grooves, which significantly increase the friction between the rubber strip 2 and the inner wall of the pipe, similar to how tire treads enhance friction with the ground, ensuring the device remains stable within the pipe. The rubber strip 2 is made of EPDM rubber, which has excellent weather resistance, ozone resistance, chemical corrosion resistance, and good elasticity and flexibility, adapting to pipes under different water qualities and environmental conditions, effectively extending the service life of the rubber strip 2 and ensuring the reliability of the device. The rubber strip 2 has a thickness of 15mm-20mm. A connector 4 is fixedly connected to the right side of the conduit 1, with a distance greater than 20cm between the connector 4 and the rubber strip 2 to facilitate subsequent welding operations. The connector 4 has a drainage pipe 5 on its right side, and a control valve 8 on the drainage pipe 5. The control valve 8 is a ball valve. As a common and high-performance valve type, the ball valve has the advantages of low flow resistance, rapid opening and closing, and good sealing performance. It can achieve precise control of the drainage channel in a short time, ensuring the efficiency and stability of the drainage process. The control valve 8 is made of stainless steel. The rubber belt 2 has a cavity inside. The right side of the rubber belt 2 is connected to the inflation pipe 3. The outer wall of the inflation pipe 3 has a first thread layer and an inflation device is installed on the outside. The first thread layer on the outer wall of the inflation pipe 3 is designed to facilitate the connection with the inflation device. This thread structure can ensure a tight fit with the inflation device and prevent air leakage during the inflation process, ensuring the smooth operation of the inflation operation. A pressure gauge 9 is installed on the right side of the rubber belt 2. The pressure gauge 9 is precisely installed on the right side of the rubber belt 2. It can display the air pressure value in the rubber belt 2 in real time and accurately, providing important reference for operators to adjust the inflation or deflation operation in a timely manner to ensure that the air pressure in the rubber belt 2 is within the appropriate range.

[0025] The drainage pipe 5 is connected to a pressure relief branch pipe 7, and a safety valve 6 is installed on the pressure relief branch pipe 7. The pressure relief branch pipe 7 and the pressure relief port of the safety valve 6 are seamlessly connected. Its diameter and length are designed according to the actual pressure relief requirements, which can quickly and effectively guide the pressure and medium released by the safety valve 6 to a safe position to avoid affecting the surrounding environment and equipment.

[0026] The outer wall of the drainage pipe 5 is provided with a second thread layer, and the inner wall of the connector 4 is provided with an internal thread. The drainage pipe 5 and the connector 4 are threadedly connected. A sealing ring is provided on the left inner wall of the connector 4. The connection between the drainage pipe 5 and the connector 4 through the threaded connection not only ensures the firmness of the connection, but also plays a certain role in sealing. At the same time, this connection method is adjustable and can be finely adjusted according to the actual installation situation to ensure the accuracy and stability of the connection.

[0027] The functional principle of this utility model can be explained through the following operation: Before carrying out pipeline repair work, the pipeline expansion and drainage pipe is inserted into the pipeline near the leak point. The guide tube 1 is properly positioned along the pipeline axis, and the rubber band 2 is precisely positioned in the predetermined position, which is usually near the leak point, pipe replacement point, or valve re-welding point that needs to be repaired.

[0028] An inflation device is used to connect the inflation pipe 3. Because the outer wall of the inflation pipe 3 has a first threaded layer, a stable connection with the inflation device is ensured. The inflation device inflates the cavity inside the rubber strip 2. As gas is continuously injected, the rubber strip 2 gradually expands. The rubber strip 2 is made of EPDM rubber with multiple horizontal grooves, and its thickness is between 15mm and 20mm. This material has excellent flexibility, aging resistance, and sealing properties. The appropriate thickness provides sufficient expansion force to ensure the rubber strip 2 fits tightly against the inner wall of the pipe, while maintaining a certain degree of elasticity. The horizontal grooves on the outer wall further increase the friction between the rubber strip 2 and the inner wall of the pipe, thereby creating a stable and reliable temporary sealing environment, effectively preventing leakage of the medium inside the pipe from the gap between the device and the inner wall of the pipe.

[0029] The drainage pipe 5 is threaded to the inner thread of the connector 4 via the second threaded layer on its outer wall. The sealing ring on the left inner wall of the connector 4 ensures a good seal at the connection. The ball valve 8, made of stainless steel, on the drainage pipe 5 is then opened. Under pressure, the water (or other medium) in the pipe is guided to the outside along the conduit 1 and the drainage pipe 5, thereby reducing the pressure inside the pipe. This creates favorable conditions for subsequent maintenance operations such as welding, pipe replacement, or valve re-welding under reduced pressure.

[0030] The pressure gauge 9 installed on the right side of the rubber belt 2 can display the air pressure value inside the rubber belt 2 in real time. Operators can adjust the inflation or deflation of the inflation pipe 3 according to the reading of the pressure gauge 9 to ensure that the air pressure inside the rubber belt 2 is always within a reasonable range, guaranteeing a good seal without causing excessive pressure on the inner wall of the pipe and causing damage. Simultaneously, during the drainage process, if the pressure inside the pipe suddenly increases for some reason, the safety valve 6 installed on the drainage pipe 5 will automatically open. The pressure relief port of the safety valve 6 is connected to the pressure relief branch pipe 7, through which the medium in the pipe will be discharged, quickly reducing the pressure inside the pipe and ensuring the safety of the entire device and pipeline system, preventing the rubber belt 2 from rupturing or causing other safety accidents due to excessive pressure.

[0031] Once the pressure inside the pipeline has decreased to a suitable level, construction personnel can perform normal welding operations in a relatively safe and stable depressurization environment to repair leaks, replace parts of the pipeline, or re-weld valves. After the maintenance work is completed, the ball valve control valve 8 is closed to stop drainage. Then, the gas in the rubber band 2 is slowly released through the inflation pipe 3. Once the rubber band 2 returns to its initial state, the entire pipeline expansion and drainage pipe is removed from the pipeline, thus completing the maintenance operation.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A duct expansion drainage tube, comprising a conduit (1), characterized in that: A rubber band (2) is fixedly connected to the outside of the conduit (1), and a connector (4) is fixedly connected to the right side of the conduit (1). A drainage pipe (5) is provided on the right side of the connector (4), and a control valve (8) is provided on the drainage pipe (5). A cavity is provided inside the rubber band (2), and an air inflator (3) is connected to the right side of the rubber band (2). A first threaded layer is provided on the outer wall of the air inflator (3).

2. The pipe expansion drainage pipe according to claim 1, characterized in that: The outer wall of the rubber strip (2) is provided with multiple horizontal lines. The rubber strip (2) is made of EPDM rubber and the thickness of the rubber strip (2) is 15mm-20mm.

3. The pipe expansion drainage pipe according to claim 1, characterized in that: The drainage pipe (5) is connected to a pressure relief branch pipe (7), and a safety valve (6) is installed on the pressure relief branch pipe (7).

4. The pipe expansion drainage pipe according to claim 1, characterized in that: A pressure gauge (9) is installed on the right side of the rubber belt (2).

5. A pipe expansion drainage pipe according to claim 1, characterized in that: The outer wall of the drainage pipe (5) is provided with a second thread layer, the inner wall of the connector (4) is provided with an internal thread, the drainage pipe (5) is threadedly connected to the connector (4), and the left inner wall of the connector (4) is provided with a sealing ring.

6. A pipe expansion drainage tube according to claim 1, characterized in that: The control valve (8) is a ball valve and is made of stainless steel.

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