Large-diameter electric smelting ring and application method thereof

Abstract

The invention discloses a large-diameter electric smelting ring and an application method thereof. The invention discloses a large-diameter electric smelting ring and preparation and application methods thereof, the large-diameter electric smelting ring is included, one side of a pipe body is a birdmouth, the other side of the pipe body is a connector, and the connection mode of the large-diameter electric smelting ring is particularly suitable for the installation and connection requirements of a large-diameter pipeline. The connecting mode that the birdmouth is connected with the connecting port facilitates operation of large-diameter pipelines and heavy objects, butt joint accuracy can be guaranteed by matching with the limiting boss, meanwhile, the electric melting ring achieves direct melting connection of the birdmouth and the connecting port through the electric melting heating technology, relying on threads or flanges or other mechanical connecting pieces is not needed, and the electric melting ring is simple in structure, convenient to operate and high in practicability. The construction process is simplified, a segmented heating method is adopted, and the heating power and current are accurately controlled through three stages of preheating, melting and uniform distribution, so that resin is gradually softened, flows and is uniformly spread, and the problems of stress concentration, local accumulation and the like in a welding area are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pipelines, in particular to a large-caliber electric fusion ring and an application method thereof. Background Art

[0002] With the development of modern engineering construction and infrastructure, especially in the fields of water supply, gas, chemical industry and electricity, the use of large-diameter pipelines is becoming more and more widespread. Large-diameter pipelines have become an important solution for long-distance medium transportation due to their large transportation volume and strong pressure bearing capacity. However, how to efficiently and reliably connect large-diameter pipelines has always been a technical challenge faced by the industry. At the same time, the application of large-diameter pipelines in high-pressure, long-distance transportation and complex environments has put forward higher requirements on the sealing, mechanical strength and durability of pipeline connections. At present, the connection methods of large-diameter pipelines mainly include traditional methods such as flange connection, threaded connection and welding connection, but these methods have certain limitations in practical applications.

[0003] After searching, it is found that Chinese patent literature discloses a large-diameter electric fusion sleeve and its use and a method for detecting welding reliability [Application Number: 202210159546.6, Publication Number: CN114396519A], which includes a sleeve body, a gap adjustment bolt, an electric fuse group, a pressure test nozzle and a sealing plug. Although this scheme also adopts a capacitor method, it also requires metal structural parts for fixing, and the operation is relatively complicated and is not suitable for complex environments. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a large-caliber electric fusion ring and an application method thereof.

[0005] A large-caliber electric fusion ring and an application method thereof, characterized in that:

[0006] The large-caliber electric fusion ring comprises a pipe body, one side of the pipe body is a receiving port, and the other side of the pipe body is a connecting port;

[0007] The connecting port is provided with a connecting ring;

[0008] The receiving interface comprises baffle plate 1, baffle plate 2, a capacitor belt and a terminal, the capacitor belt is arranged between baffle plate 1 and baffle plate 2, a hole is opened on the receiving interface, the terminal is arranged in the hole, the bottom of the terminal is connected to the capacitor belt, the top of the terminal protrudes out of the hole opened on the receiving interface, and a dust cover is arranged on the top of the terminal;

[0009] The outer side of the tube body is surrounded by a buffer layer.

[0010] Preferably, the inner diameter of the receiving port is larger than the outer diameter of the connecting port.

[0011] Through the above technical solution, accurate connection between pipes can be effectively achieved, providing space buffer for resin melt flow during welding, and preventing stress concentration caused by thermal expansion and contraction or uneven melting. At the same time, since the inner diameter of the socket is larger than the outer diameter of the connection port, it can be positioned by plugging before welding, improving the convenience and accuracy of installation and docking, ensuring that the pipe bodies at both ends maintain good coaxiality during welding, effectively improving the sealing and mechanical strength of the welding interface, and avoiding dislocation or deformation of the interface.

[0012] Preferably, the shape of the buffer layer includes tubular or wavy.

[0013] Through the above technical solution, the buffering and protection performance of the pipe body when subjected to external forces can be effectively improved, the direct impact of external impact on the pipe body can be reduced, and the service life of the pipeline system can be extended. The shape of the buffer layer is designed to be tubular or wavy, which can provide targeted buffering and protection effects according to different application scenarios and mechanical requirements.

[0014] Preferably, a limiting boss is provided on the inner side of the receiving interface.

[0015] The above technical solution can effectively improve the positioning accuracy and installation convenience of pipeline connection. The limit boss set on the inner side of the socket plays a mechanical positioning role when the two pipes are plugged in, preventing the connection port from being over-inserted or offset, and ensuring that the coaxiality and docking depth of the connection interface meet the design requirements.

[0016] Preferably, the capacitor strip comprises copper wires and a resin strip, the resin strip is provided with grooves evenly and equidistantly, and the copper wires are wound around the resin strip through the grooves.

[0017] Through the above technical solution, the electrical heat conduction efficiency and welding uniformity of the capacitor strip can be effectively improved. The grooves that are evenly and equidistantly opened on the resin strip provide precise copper wire layout spacing, ensuring that the copper wire is more stable and regular when it is wound on the resin strip, so that the heat generated when the current passes through the copper wire can be evenly distributed to the welding area, avoiding local overheating or insufficient heating. In addition, the groove structure can physically limit the copper wire to prevent the copper wire from shifting or deforming during resin melting or pipe welding, further ensuring the stability and consistency of heat transfer during electric melting heating. The capacitor strip designed in this way can form a uniform temperature field during the resin melting and heating process, so that the molten resin spreads evenly under the action of gravity and molecules, thereby improving the overall strength and sealing performance of the welding interface.

[0018] Preferably, the resin strip composition includes 40%-50% high-density polyethylene, 10%-15% linear low-density polyethylene, 5%-10% polybutene-1, 3%-5% boron nitride, 2%-4% organic montmorillonite, 5%-7% epoxidized soybean oil, 3%-5% nano zinc oxide, and 0.2%-0.5% bisphenol A type antioxidant.

[0019] Through the above technical scheme, the formula of the resin strip can effectively improve the material properties during the welding process and ensure the quality and reliability of the electric fusion connection. The 40%-50% high-density polyethylene in the formula provides the resin strip with good mechanical strength and heat resistance, ensuring that the material will not flow excessively or become unstable during high-temperature heating, forming a stable welding structure. The 10%-15% linear low-density polyethylene gives the resin strip better flexibility and fluidity, which is conducive to the uniform spreading of the resin in the molten state to the welding area, avoiding local accumulation problems. 5%-10% polybutene-1 enhances the impact resistance and thermal fusion strength of the material, enabling the welded joint to maintain high strength and high reliability under complex working conditions. In addition, the addition of 3%-5% boron nitride and 2%-4% organic montmorillonite can improve the thermal conductivity and rheological properties of the material, ensure that heat is quickly and evenly conducted to the welding area, and enhance the melting effect. At the same time, 5%-7% epoxidized soybean oil, as an environmentally friendly plasticizer, reduces the melting temperature of the material and improves the processing performance and flexibility of the resin strip. 3%-5% nano zinc oxide enhances the material's antioxidant properties and mechanical strength, effectively extending the service life of the resin welding layer. 0.2%-0.5% bisphenol A antioxidant added to the formula prevents thermal oxidation degradation of the material during high-temperature welding, ensuring the stability of the resin strip performance.

[0020] Preferably, the application method of the large-caliber electric fusion ring is as follows:

[0021] Step 1: Connect the receiving port of a large-diameter electric fusion ring to the connecting port of another large-diameter electric fusion ring;

[0022] Step 2: Open the dust cover, connect the positive and negative electrodes of the heater to the terminals respectively, and heat the resin by energizing it. The heating method adopts the segmented heating method;

[0023] Step 3: After cooling, remove the heater and install the dust cover back to the terminal block.

[0024] Through the above technical scheme, it can be ensured that the large-caliber electric fusion ring is easy to operate, heated evenly and welded reliably during the connection process. In the first step, the precise docking of the socket and the connection port, combined with the limiting structure on the inner side of the socket, can effectively improve the coaxiality of the connection, reduce the installation error, and ensure the stability and sealing of the pipeline connection. In the second step, a segmented heating method is adopted to gradually soften and melt the resin by accurately controlling the heating power and current, and evenly spread it in the joint area to avoid thermal shock and local overheating, and ensure that a dense and uniform molten layer is formed in the welding area. In addition, the design of the dust cover effectively protects the terminal from dust and moisture erosion, and improves the stability and safety of the heating process. In the third step, after cooling and unloading, the resin in the welding area gradually solidifies to form a high-strength, high-sealing connection structure, ultimately ensuring the reliability and durability of the pipeline system. Through the above method, the installation process of the large-caliber electric fusion ring is more standardized and convenient, which can significantly improve the construction efficiency and connection quality, and meet the use requirements under complex working conditions such as high pressure and long-distance transportation.

[0025] Preferably, the segmented heating method comprises the following steps:

[0026] Step 1: Preheating stage;

[0027] Adjust the heater power to 500W-700W, maintain the current at 3A-5A, and preheat for 2 minutes to gradually soften the resin;

[0028] Step 2: Melting stage;

[0029] Increase the heater power to 1200W-1500W, maintain the current at 8A-10A, and melt for 3 minutes to make the resin melt quickly and reach a flowing state;

[0030] Step 3: Uniform distribution stage;

[0031] Reduce the heater power to 300W-500W, control the current at 2A-4A, and maintain it for 3 minutes to allow the molten resin to spread evenly to the connection area under the action of gravity and molecules.

[0032] Through the above technical scheme, the precise control of the resin melting and heating process can be achieved to ensure the stability and reliability of the welding quality. Through the segmented heating method, the resin is gradually softened, melted and evenly distributed at different stages, avoiding thermal shock or local overheating caused by drastic temperature changes, thereby reducing the probability of internal stress of the material and welding defects. In the preheating stage, the resin is gradually softened and internal stress is released through low-power and low-current heating, reducing the impact of thermal shock on the pipeline material at the initial stage of heating, ensuring uniform temperature distribution of the welding interface, and laying the foundation for the subsequent melting process. In the melting stage, the resin is quickly melted by high-power and high-current heating, improving welding efficiency, and ensuring that the molten resin has good fluidity to fully fill the connection area. In the uniform distribution stage, by reducing power and current, the resin flows slowly under the action of gravity and molecules, and spreads evenly to the welding interface, effectively avoiding local accumulation and stress concentration, and forming a dense and uniform welding layer.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] 1. The connection method of the large-diameter electric fusion ring is particularly suitable for the installation and connection requirements of large-diameter pipes. The connection method of connecting the socket and the connecting port is not only convenient for large-diameter pipes with large sizes and heavy objects, but also cooperates with the limiting boss to ensure the accuracy of docking.

[0035] 2. The large-diameter electric fusion ring realizes direct fusion connection between the socket and the connection port through the electric fusion heating process, without relying on threads, flanges or other mechanical connectors, which simplifies the construction process, reduces installation difficulty and time cost, and ensures high sealing and integrated strength of the interface.

[0036] 3. The large-diameter electric fusion ring adopts a segmented heating method. The heating power and current are precisely controlled through three stages: preheating, melting and uniform distribution, so that the resin gradually softens, flows and spreads evenly, ensuring that stress concentration and local accumulation are eliminated in the welding area, forming a dense and uniform fusion layer, and improving the overall quality and reliability of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0038] Figure 2 It is a partial cross-sectional schematic diagram of the present invention;

[0039] Figure 3 It is a partial enlarged schematic diagram of A of the present invention;

[0040] Figure 4 It is a partial enlarged schematic diagram of B of the present invention;

[0041] Figure 5 Schematic diagram of a capacitor strip according to the present invention.

[0042] In the figure: 101, tube body; 102, socket; 103, connection port; 201, connection ring; 301, baffle 1; 302, baffle 2; 303, capacitor belt; 304, terminal; 305, dust cover; 306, limit boss; 401, buffer layer; 501, copper wire; 502, resin strip. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figures 1 to 5 ,The present invention provides a technical solution: a large-caliber electric fusion ring and an application method thereof;

[0045] Specific:

[0046] Embodiment 1:

[0047] The resin strip 502 comprises 50% high-density polyethylene, 15% linear low-density polyethylene, 10% polybutene-1, 5% boron nitride, 4% organic montmorillonite, 7% epoxidized soybean oil, 5% nano zinc oxide, and 5% bisphenol A antioxidant.

[0048] The connection steps are as follows:

[0049] The first step: connecting the receiving port 102 of a large-diameter electric fusion ring with the connecting port 103 of another large-diameter electric fusion ring;

[0050] Step 2: Open the dust cover 305, connect the positive and negative electrodes of the heater to the terminal 304 respectively, and heat the resin strip 502 by powering on. The heating method adopts the segmented heating method;

[0051] Step 3: After cooling, remove the heater and install the dust cover 305 back to the terminal block.

[0052] Wherein, the step method of segmented heating is as follows:

[0053] Step 1: Preheating stage;

[0054] The heater power is adjusted to 700W, the current is maintained at 5A, and the preheating time is 2 minutes, so that the resin strip 502 gradually softens;

[0055] Step 2: Melting stage;

[0056] The heater power is increased to 1500W, the current is maintained at 10A, and the melting time is 3 minutes, so that the resin strip 502 melts quickly and reaches a flowing state;

[0057] Step 3: Uniform distribution stage;

[0058] The heater power is reduced to 500 W, the current is controlled at 4 A, and maintained for 3 minutes, so that the molten resin strip 502 is evenly spread to the connection area under the action of gravity and molecules.

[0059] The test data of Example 1 is shown in Table 1.

[0060] Table 1

[0061]

[0062]

[0063] Example 2

[0064] The resin strip 502 comprises 70% high-density polyethylene, 15% polypropylene, 10% talc, 8% dioctyl phthalate, and 0.3% hindered phenol antioxidant.

[0065] The connection steps and heating method are the same as those in Example 1.

[0066] The test data of Example 2 is shown in Table 2.

[0067] Table 2

[0068]

[0069]

[0070] Example 3

[0071] The resin strip 502 comprises 70% linear low-density polyethylene, 15% polypropylene, 20% calcium carbonate, 5% dioctyl phthalate, and 0.3% hindered phenol antioxidant.

[0072] The connection steps and heating method are the same as those in Example 1.

[0073] The test data of Example 3 is shown in Table 3.

[0074] Table 3

[0075]

[0076]

[0077] Example 1 uses the resin strip 502, connection steps and heating method mentioned in the present invention, Example 2 uses the resin strip 502 of a conventional formula, and Example 3 uses the resin strip 502 of the same type of formula. It can be seen from the experimental data that in terms of tensile strength, impact strength, high and low temperature resistance, sealing and bubble control, the experimental data of Example 1 is better than that of Example 2 and Example 3, especially in terms of sealing and bubble rate.

[0078] Example 4

[0079] The composition of the resin strip 502 is the same as that of the first embodiment.

[0080] The connection steps are as follows:

[0081] The first step: connecting the receiving port 102 of a large-diameter electric fusion ring with the connecting port 103 of another large-diameter electric fusion ring;

[0082] Step 2: Open the dust cover 305, connect the positive and negative electrodes of the heater to the terminal 304 respectively, and heat the resin strip 502 by powering on. The heating method adopts the direct heating method;

[0083] Step 3: After cooling, remove the heater and install the dust cover 305 back to the terminal block.

[0084] Wherein, the direct heating step method is as follows:

[0085] Adjust the heater power to 1500W and maintain the current at 10A for 10 minutes.

[0086] The test data of Example 4 is shown in Table 4.

[0087] Table 4

[0088]

[0089]

[0090] By comparing Example 1 with Example 4, it can be found that the data related to mechanical strength are not affected too much by adopting different heating methods, but the data related to sealing performance is very poor, and the bubble rate is significantly increased. The products produced by this heating method are completely unable to meet the use requirements.

[0091] In summary, Example 1, i.e., a large-diameter electric fusion ring and its application method mentioned in the present invention, has the best effect.

[0092] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0093] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0094] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large-caliber electric fusion ring and its application method, characterized in that: The large-caliber electric fusion ring comprises a pipe body (101), one side of the pipe body (101) is a receiving port (102), and the other side of the pipe body (101) is a connecting port (103); The connecting port (103) is provided with a connecting ring (201); The receiving interface (102) comprises a baffle plate 1 (301), a baffle plate 2 (302), a capacitor belt (303) and a terminal (304); the capacitor belt (303) is arranged between the baffle plate 1 (301) and the baffle plate 2 (302); a hole is provided on the receiving interface (102); the terminal (304) is arranged in the hole; the bottom of the terminal (304) is connected to the capacitor belt (303); the top of the terminal (304) protrudes out of the hole provided on the receiving interface (102); and a dust cover (305) is provided on the top of the terminal (304); The outer side of the tube body (101) is surrounded by a buffer layer (401).

2. A large-caliber electric fusion ring according to claim 1, characterized in that: The inner diameter of the receiving port (102) is greater than the outer diameter of the connecting port (103).

3. A large-caliber electric fusion ring according to claim 1, characterized in that: The shape of the buffer layer (401) includes tubular or wavy.

4. A large-caliber electric fusion ring according to claim 1, characterized in that: A limiting boss (306) is provided inside the receiving interface (102).

5. A large-caliber electric fusion ring according to claim 1, characterized in that: The capacitor strip (303) comprises a copper wire (501) and a resin strip (502). The resin strip (502) is provided with grooves evenly and equidistantly, and the copper wire (501) is wound around the resin strip (502) through the grooves.

6. The resin strip (502) according to claim 4, characterized in that: The resin strip (502) comprises 40%-50% high-density polyethylene, 10%-15% linear low-density polyethylene, 5%-10% polybutene-1, 3%-5% boron nitride, 2%-4% organic montmorillonite, 5%-7% epoxidized soybean oil, 3%-5% nano zinc oxide, and 0.2%-0.5% bisphenol A antioxidant.

7. A large-caliber electric fusion ring and its application method according to claims 1 to 4, characterized in that: The application method is as follows: The first step is to connect the receiving port (102) of a large-diameter electric fusion ring with the connecting port (103) of another large-diameter electric fusion ring; Step 2: Open the dust cover (305), connect the positive and negative electrodes of the heater to the terminal (304) respectively, and heat the resin by applying electricity. The heating method adopts a segmented heating method; Step 3: After cooling, remove the heater and install the dust cover (305) back to the terminal block.

8. The segmented heating method according to claim 5, characterized in that: The segmented heating method comprises the following steps: Step 1: Preheating stage; Adjust the heater power to 500W-700W, maintain the current at 3A-5A, and preheat for 2 minutes to gradually soften the resin; Step 2: Melting stage; Increase the heater power to 1200W-1500W, maintain the current at 8A-10A, and melt for 3 minutes to make the resin melt quickly and reach a flowing state; Step 3: Uniform distribution stage; Reduce the heater power to 300W-500W, control the current at 2A-4A, and maintain it for 3 minutes to allow the molten resin to spread evenly to the connection area under the action of gravity and molecules.

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