High-frequency welding impedor and use method

Abstract

The invention relates to the technical field of high-frequency welding, in particular to a high-frequency welding impedor and a using method. The high-frequency welding impedor comprises a water tank, a magnetizer and an inductor, the bottom of the water tank protrudes upwards to form a protruding part, the inner side of the protruding part is a part of the inner wall of the water tank, and a through groove in the length direction of the water tank is formed in the outer side of the protruding part. The magnetizer is installed in the water tank, the lower side of the magnetizer is provided with an opening part matched with the protruding part of the water tank, a gap is formed between the protruding part and the opening part to form a first cooling water channel, and a through hole is formed in the upper side of the opening part of the magnetizer to form a second cooling water channel. The inductor is clamped in the through groove in the outer side of the protruding part of the water tank, and the problems that due to insufficient cooling, the service life of the magnetizer is shortened, and the welding efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of high frequency welding, and in particular to a high frequency welding resistor and a use method thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] High frequency is relative to the frequency of 50hz AC current, generally refers to high frequency current of 50khz-400khz. When high frequency current passes through a metal conductor, two effects will occur: skin effect and proximity effect. High frequency welding uses these two effects to weld steel pipes. The emergence and maturity of high frequency welding technology is a key process for straight seam welding production. The quality of high frequency welding directly affects the overall strength, quality grade and production speed of welded pipe products.

[0004] When high-frequency induction heating is used for metal welding, the impedance can greatly increase the induced electromotive force in the welded pipe and increase the welding power. The main component of the impedance is the magnetic conductor (i.e., magnetic core), which increases the inductive reactance on the surface of the pipe, reduces the high-frequency current flowing to the back of the steel pipe, and concentrates the current to reduce the ineffective current, ensuring that the heat will not be lost due to the heating of the pipe body; and can make the magnetic flux in the induction coil distributed in the magnetic core, and the magnetic flux between the induction coil and the welded pipe is relatively reduced, thereby increasing the welding speed. Therefore, during high-frequency welding, the performance of the magnetic conductor greatly affects the welding efficiency, quality and stability of the welded pipe, and also affects the energy consumption of steel pipe welding.

[0005] The impeder magnet is made of ferrite, and its Curie temperature is required to be no less than 310°C. During use, the heating temperature of the welding joint is 1340-1380 degrees, and the magnet is at high temperature. Once the temperature exceeds 310°, the magnetic core will be paramagnetized, losing the impeder function, increasing the welding power, and causing the tube to overheat. At present, when welding using high-frequency induction heating, the life of the magnet is seriously shortened during use due to insufficient cooling. The efficiency and stability of welding are affected by the performance and life of the impeder magnet. The existing magnet structure cannot achieve more efficient welding, which brings many inconveniences to the production and processing process. Summary of the invention

[0006] In view of the deficiencies in the prior art, an object of an embodiment of the present invention is to provide a high-frequency welding resistor to solve the problems of shortened service life and low welding efficiency due to insufficient cooling of the magnetic conductor.

[0007] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0008] A high-frequency welding impedance device comprises: a water tank, a magnetizer and an inductor; the bottom of the water tank bulges upward to form a protrusion, the inner side of the protrusion is a part of the inner wall of the water tank, and the outer side of the protrusion forms a through groove along the length direction of the water tank; the magnetizer is installed inside the water tank, and has an opening on the lower side that matches the protrusion of the water tank, a gap is formed between the protrusion and the opening to form a first cooling water channel, and a through hole is provided on the upper side of the opening of the magnetizer to form a second cooling water channel; the inductor is clamped in the through groove on the outer side of the protrusion of the water tank.

[0009] In another preferred embodiment of the present invention, the water tank comprises a box body, a flange and an upper cover, the top of the box body is fixedly connected to the flange, and the upper cover is detachably connected to the flange.

[0010] In another preferred embodiment of the present invention, a water inlet is provided on the upper cover, and a water outlet is provided on the side of the box body.

[0011] In another preferred embodiment of the present invention, the box body, flange and upper cover are made of tetrafluoroethylene.

[0012] In another preferred embodiment of the present invention, the sensor is a tubular structure, comprising a straight edge section, a sensing section and an inclined section connected in sequence, the sensing section is snapped into a through groove on the outer side of the raised portion, the straight edge section and the sensing section are vertically arranged, and the sensing section and the inclined section are arranged at an obtuse angle.

[0013] In another preferred embodiment of the present invention, the inclined section of the sensor is followed by a bent section, and the bent section is bent toward the straight edge section.

[0014] In another preferred embodiment of the present invention, the distance between the bending section and the straight edge section is 3-5 mm.

[0015] In another preferred embodiment of the present invention, the magnetic conductor is a sheet-like structure, and a plurality of magnetic conductors are snap-fitted onto the raised portion of the water tank.

[0016] The embodiment of the present invention also provides a method for using the high-frequency welding impedance device, inserting the magnetic conductor into the raised portion at the bottom of the water tank, clamping the inductor into the through groove outside the raised portion, installing the steel pipe to be welded at the bottom of the through groove, and connecting the cooling water.

[0017] In another preferred embodiment of the present invention, the distance between the bottom of the sensor and the steel pipe is 1-3 mm.

[0018] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0019] 1. The impedance device of the present invention installs the magnet in the water tank by cooperating with the raised part of the water tank and the opening of the magnet, and the opening of the magnet and the top of the raised part of the water tank form a first cooling water channel, and the magnet is provided with a second cooling water channel. When cooling water is connected to the water tank, the cooling water flows through the outer surface of the magnet, the first cooling water channel and the second cooling water channel, thereby increasing the cooling area and realizing all-round cooling. The cooling effect is good, the service life of the magnet is greatly extended, and the efficiency and stability of welding are improved.

[0020] 2. The inductor of the present invention reduces the loss of magnetic flux by setting a bent section close to the straight edge section, thereby improving the induction effect and increasing the welding speed.

[0021] 3. In the present invention, the magnetizer is configured in a sheet-like module, and a plurality of magnetizers are installed as required. When part of the magnetizers is damaged, only the damaged part needs to be replaced.

[0022] 4. The high-frequency welding impedance of the present invention has a reasonable structure and good magnetic conductivity, which can increase the induced electromotive force of the welded pipe and reduce the welding current by about 15%. It uses high-pressure cooling water for cooling. The cooling water channel is reasonably designed and has good cooling effect, which can greatly increase the service life of the impedance, reduce production costs, and improve welding effect and production efficiency.

[0023] Advantages of additional aspects of the present invention will be given in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 is a side schematic diagram of a high-frequency welding impedance device according to an embodiment of the present invention;

[0027] Figure 2 2 is a front view of a high frequency welding impedance device according to an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of a water tank of a high-frequency welding impedance device according to an embodiment of the present invention;

[0029] Figure 4 1. It is a top view of a water tank body and a flange of a high-frequency welding impedance device according to an embodiment of the present invention;

[0030] Figure 5Schematic diagram of a water tank upper cover of a high-frequency welding impedance device according to an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of a magnetic conductor of a high-frequency welding resistor according to an embodiment of the present invention;

[0032] In the figure: 1, water tank; 11, raised part; 12, box body; 13, flange; 14, upper cover; 15, water inlet; 16, water outlet; 17, through groove; 2, magnetic conductor; 21, opening; 22, through hole; 3, sensor; 31, straight edge section; 32, sensor section; 33, inclined section; 34, bent section; 4, steel pipe; 01, first cooling water channel; 02, second cooling water channel;

[0033] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0034] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0035] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0036] The terms "upper" and "upper portion" refer to the general direction away from the direction of gravity, and the terms "bottom", "lower" and "lower portion" refer to the general direction of gravity. The term "advance" refers to the direction in which the guide wire or catheter is displaced into the body of the surgical patient. In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0037] As introduced in the background technology, when welding using the existing high-frequency induction heating method, the magnetic conductor is insufficiently cooled and its life is severely shortened. The efficiency and stability of welding are affected by the performance and life of the resistor magnetic conductor, and efficient welding cannot be achieved, which brings many inconveniences to production and processing. In order to solve the above technical problems, the present invention proposes a high-frequency welding resistor.

[0038] like Figure 1-Figure 6 As shown, one embodiment of the present invention records a high-frequency welding impedance device, including: a water tank 1, a magnetizer 2 and an inductor 3; the bottom of the water tank 1 bulges upward to form a protrusion 11, the inner side of the protrusion 11 is a part of the inner wall of the water tank 1, and the outer side of the protrusion 11 forms a through groove 17 along the length direction of the water tank 1; the magnetizer 2 is installed inside the water tank 1, and has an opening 21 on the lower side that matches the protrusion 11 of the water tank 1, and there is a gap between the protrusion 11 and the opening 21 to form a first cooling water channel 01, and a through hole 22 is provided on the upper side of the opening 21 of the magnetizer 2 to form a second cooling water channel 02; the inductor 3 is snapped into the through groove 17 on the outer side of the protrusion 11 of the water tank 1. Among them, the inner side of the protrusion, i.e. Figure 3 The upper side of the raised portion in the middle, and the outer side of the raised portion is the lower side.

[0039] The impedance device of the present invention installs the magnet in the water tank through the cooperation of the water tank protrusion and the magnet opening, and the magnet opening and the top of the water tank protrusion form a first cooling water channel, and the magnet is provided with a second cooling water channel. When cooling water is connected to the water tank, the cooling water flows through the outer surface of the magnet, the first cooling water channel and the second cooling water channel, thereby increasing the cooling area and realizing all-round cooling. The cooling effect is good, the service life of the magnet is greatly extended, and the welding efficiency and stability are improved.

[0040] like Figure 3-5 As shown, the water tank 1 includes a box body 12, a flange 13 and an upper cover 14. The top of the box body 12 is fixedly connected to the flange 13, and the upper cover 14 is detachably connected to the flange 13. A water inlet 15 is provided on the upper cover 14, and a water outlet 16 is provided on the side of the box body 12. The box body 12, the flange 13 and the upper cover 14 are made of tetrafluoroethylene, which has good insulation performance, temperature resistance of 260°C, and longer service life. The upper cover 14 and the box body flange are sealed with sealant and connected with tetrafluoroethylene bolts to form a sealed cooling water chamber. A cooling water inlet is installed on the upper cover 14, and at least two cooling water outlets are provided on the box body. The cooling water pressure is 0.5-0.8MPa. Of course, it can be understood that conventional components such as high-pressure water pumps and pressure gauges are also included.

[0041] like Figure 2 As shown, the sensor 3 is a tubular structure, including a straight edge section 31, a sensing section 32 and an inclined section 33 connected in sequence, the sensing section 32 is snapped into the through groove 17 on the outer side of the protrusion 11, the straight edge section 31 and the sensing section 32 are vertically arranged, and the sensing section 32 and the inclined section 33 are arranged at an obtuse angle.

[0042] like Figure 2 As shown, the left side of the water tank is a straight end surface and the right side is an inclined surface. The sensor is made of square copper tubes welded together, and one end of the sensor is made into a right angle ( Figure 2The lower left corner of the middle part of the sensor makes the straight end face of the water tank closer to the straight edge section of the sensor, and also makes the magnet closer to the extrusion welding point on the left (the opening at the upper end of the steel pipe), improving the welding effect. At the same time, high-pressure cooling water is also introduced into the sensor copper tube. By setting the right side as an inclined section with an obtuse angle to the sensor section and rounding the corners, the resistance loss of the cooling water inside the sensor is reduced, and the cooling effect is improved.

[0043] The inclined section 33 of the sensor 3 is followed by a bent section 34, and the bent section 34 is bent toward the straight section 31. Figure 2 As shown, the two copper tubes at the upper ends of the inductor 3 are arranged as close as possible, with a distance of 3-5 mm, so as to improve the induction effect and reduce the loss of magnetic flux.

[0044] like Figure 2 As shown, the magnetizer 2 is a sheet structure, and a plurality of magnetizers 2 are snapped onto the raised portion 11 of the water tank 1. The material of the magnetizer 2 is ferrite, with a density of 4.8-5.2 g / cm3, a Curie temperature of less than 320 degrees, and a magnetic flux density of 3700-4000 MT. The magnetizer 2 is modular, with a single sheet thickness of 10 mm. When in use, it can be bonded according to the length of the slot of the lower shell. If it is damaged during use, only the damaged part needs to be replaced, thereby increasing the number of uses and life.

[0045] When in use, insert the magnetizer into the raised part at the bottom of the water tank in sequence, squeeze it tightly, install the upper cover, and fasten it with PTFE bolts, install the water inlet and outlet, and connect the high-pressure water pipeline. The bottom of the sensor is flush with the opening of the steel pipe 4, and the center line of the sensor section is aligned with the opening of the steel pipe (that is, ensure that the opening of the steel pipe is at the top).

[0046] If the distance between the bottom of the sensor and the steel pipe is too large, the heating effect of the sensor on the steel pipe will be reduced, resulting in an increase in welding power; if the distance is too small, the bottom of the sensor will contact the opening of the steel pipe, causing sparks and burning the sensor copper pipe. Therefore, in this application, the distance between the bottom of the sensor and the steel pipe is set to 1-3mm.

[0047] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A high frequency welding impedance, characterized in that: include: Water tank, magnet and sensor; The bottom of the water tank bulges upward to form a convex portion, the inner side of the convex portion is a part of the inner wall of the water tank, and the outer side of the convex portion forms a through groove along the length direction of the water tank; The magnetizer is installed inside the water tank, and has an opening on the lower side that matches the raised portion of the water tank, a gap is provided between the raised portion and the opening to form a first cooling water channel, and a through hole is provided on the upper side of the opening of the magnetizer to form a second cooling water channel; The sensor is clamped in a through groove outside the raised portion of the water tank.

2. The high frequency welding resistor according to claim 1, characterized in that: The water tank comprises a box body, a flange and an upper cover, the top of the box body is fixedly connected to the flange, and the upper cover is detachably connected to the flange.

3. The high frequency welding impedance device according to claim 2, characterized in that: The upper cover is provided with a water inlet, and the side surface of the box body is provided with a water outlet.

4. The high frequency welding impedance device according to claim 2, characterized in that: The box body, flange and upper cover are made of tetrafluoroethylene.

5. The high frequency welding impedance device according to claim 1, characterized in that: The sensor is a tubular structure, including a straight edge section, a sensing section and an inclined section connected in sequence, the sensing section is clamped in the through groove outside the protrusion, the straight edge section and the sensing section are vertically arranged, and the sensing section and the inclined section are arranged at an obtuse angle.

6. The high frequency welding impedance device according to claim 5, characterized in that: The inclined section of the sensor is followed by a bent section, and the bent section is bent toward the straight edge section.

7. The high frequency welding impedance device according to claim 6, characterized in that: The distance between the bending section and the straight edge section is 3-5 mm.

8. The high frequency welding impedance device according to claim 1, characterized in that: The magnetic conductor is a sheet-like structure, and a plurality of magnetic conductors are clamped on the raised portion of the water tank.

9. The method for using the high-frequency welding impedance according to any one of claims 1 to 8, characterized in that: Insert the magnetizer into the raised part at the bottom of the water tank, clip the sensor into the through slot outside the raised part, install the steel pipe to be welded at the bottom of the through slot, and connect the cooling water.

10. The method for using the high-frequency welding resistor according to claim 9, characterized in that: The distance between the bottom of the sensor and the steel pipe is 1-3mm.

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