Oil pipe magnetism eliminating sleeve and magnetism eliminating system

Abstract

The utility model relates to the technical field of electric arc welding degaussing equipment, in particular to an oil pipe magnetism eliminating sleeve and a magnetism eliminating system. The oil pipe magnetism eliminating sleeve comprises a coil winding, one end of the coil winding is connected with a positive electrode wiring terminal, the other end of the coil winding is connected with a negative electrode wiring terminal, at least one of the positive electrode wiring terminal and the negative electrode wiring terminal is connected with a short-circuit accessory, and the short-circuit accessory is used for being connected with any turn of coil of the coil winding, so that part of the coil is short-circuited; according to the oil pipe magnetism eliminating sleeve, the number of turns of the coil capable of being electrified can be adjusted in real time, then the magnetic field generated by the electrified coil is adjusted in real time, the oil pipe magnetism eliminating sleeve can cope with different working conditions and environments, the magnetic field can be adjusted without replacing coil windings with different numbers of turns, operation is easy, the using process is simplified, and the cost is reduced. And the overall demagnetizing efficiency of the oil pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of arc welding demagnetization equipment, in particular to a tubing magnetic elimination sleeve and a magnetic elimination system. Background Technique

[0002] The tubing used in oil extraction itself does not have magnetism, but due to the influence of medium scouring or electric submersible pump cables, the tubing is magnetized with different intensities. When recycling waste tubing, the tubing cannot be welded due to magnetic blowout during welding. Magnetic blowout during welding means that during welding, the magnetic field inside the tubing acts on the welding arc, causing the welding arc to deviate, resulting in welding defects. To eliminate magnetic blowout during welding, direct current power supply welding is usually used, and the welding cable is wound around the joint of the tubing. Using Faraday's law of electromagnetic induction, when an electric current flows through the coil outside the tubing, an electromagnetic field is generated, and the electromagnetic direction and magnitude cancel out the electromagnetic force of the tubing, thus avoiding magnetic blowout.

[0003] In addition, a Chinese patent with the authorization announcement number CN208706361U and the authorization announcement date of April 5, 2019 discloses a process pipeline demagnetization device. Its solution is to sleeved an energized coil outside the process pipeline and energize the energized coil through an external power supply mode to generate a magnetic field to demagnetize the process pipeline, so as to achieve the purpose of eliminating magnetic blowout. However, this solution provides several sets of energized coils with different numbers of turns for use. When the magnetic field generated by the energized coil used cannot completely demagnetize the process pipeline, it is necessary to replace the energized coil with other numbers of turns. In this process, the original energized coil needs to be removed, and then the new energized coil needs to be sleeved again. The operation process of changing the number of turns of the coil is complicated and the efficiency is low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tubing magnetic elimination sleeve and a magnetic elimination system, which can quickly change the number of turns of the coil, and then adjust the number of turns of the coil in real time to demagnetize the tubing with different electromagnetic intensities, aiming to solve the problems of complicated operation process and low efficiency in changing the number of turns of the coil.

[0005] To achieve the above purpose, the tubing magnetic elimination sleeve of the utility model adopts the following technical solutions:

[0006] The tubing magnetic elimination sleeve includes a coil winding. One end of the coil winding is connected with a positive terminal, and the other end is connected with a negative terminal. At least one of the positive terminal and the negative terminal is connected with a short-circuit fitting, and the short-circuit fitting is used to connect with any turn of the coil winding to short-circuit part of the coil.

[0007] Further, the coil winding is disposed on a sleeve, the sleeve is divided into two halves along the radial direction, and each turn of the coil of the coil winding is separated at the docking part of the sleeve to form a split structure, and a lap joint conductive structure is provided between the two split parts.

[0008] Further, the lap joint conductive structure is a plugging boss and a plugging hole corresponding to the plugging boss, which are respectively arranged on the two split parts of the split coil.

[0009] Further, the plugging hole is a through hole, and one end of the through hole far away from the plugging boss constitutes a connection hole of the short - circuit fitting.

[0010] Further, the short - circuit fitting is a pin that can be plugged into the connection hole.

[0011] Further, the length of the plugging boss is greater than the length of the corresponding plugging hole. When being plugged into the corresponding plugging hole, the plugging boss passes through the plugging hole to form a connection head that cooperates with the short - circuit fitting.

[0012] Further, the short - circuit fitting is a socket that can be plugged into the connection head.

[0013] Further, the short - circuit fitting is electrically connected to the corresponding wiring terminal through a flexible wire.

[0014] Further, a spiral groove is arranged on the outer wall surface of the sleeve, and the coil winding is arranged in the spiral groove.

[0015] Further, the coil winding is a copper insulated cable.

[0016] Beneficial effects: The magnetic - elimination casing for oil pipes of the present utility model is a pioneering invention. By connecting the short - circuit fitting to any turn of the coil winding, part of the coil can be short - circuited. Then, when demagnetizing the oil pipe, only by adjusting the connection between the short - circuit fitting and the corresponding turn of the coil in the coil winding, the real - time adjustment of the number of energized coil turns can be realized, and further the magnetic field generated by the energized coil can be adjusted in real time. It can cope with different working conditions without realizing the adjustment of the magnetic field by replacing coil windings with different numbers of turns. The operation is simple, the use process is simplified, and the overall efficiency of demagnetizing the oil pipe is improved.

[0017] The magnetic - elimination system for oil pipes of the present utility model adopts the following technical solutions:

[0018] The tubing magnetic elimination system includes a tubing magnetic elimination sleeve, and the tubing magnetic elimination sleeve is connected to a DC power supply through its positive and negative terminals; the tubing magnetic elimination sleeve includes a coil winding, one end of the coil winding is connected to a positive terminal, and the other end is connected to a negative terminal. At least one of the positive terminal and the negative terminal is connected with a short-circuit fitting, and the short-circuit fitting is used to connect with any turn of the coil winding of the coil, so that part of the coil is short-circuited.

[0019] Further, the coil winding is arranged on a sleeve, the sleeve is divided into two halves along the radial direction, and each turn of the coil winding is separated at the docking part of the sleeve to form a split structure, and a lap conductive structure is arranged between the two split parts.

[0020] Further, the lap conductive structure is a plugging boss and a corresponding plugging hole respectively arranged on the two split parts of the coil.

[0021] Further, the plugging hole is a through hole, and one end of the through hole far from the plugging boss constitutes the connection hole of the short-circuit fitting.

[0022] Further, the short-circuit fitting is a pin that can be plugged into the connection hole.

[0023] Further, the length of the plugging boss is greater than the length of the corresponding plugging hole. When being plugged into the corresponding plugging hole, the plugging boss passes through the plugging hole to form a connection head that cooperates with the short-circuit fitting.

[0024] Further, the short-circuit fitting is a socket that can be plugged into the connection head.

[0025] Further, the short-circuit fitting is electrically connected to the corresponding terminal through a flexible wire.

[0026] Further, a spiral groove is arranged on the outer wall surface of the sleeve, and the coil winding is arranged in the spiral groove.

[0027] Further, the coil winding is a copper insulated cable.

[0028] Beneficial effects: The tubing magnetic elimination system of the present utility model is a pioneering invention. By connecting the short-circuit fitting of the tubing magnetic elimination sleeve to any turn of the coil winding of the coil, part of the coil can be short-circuited. Then when demagnetizing the tubing, only by adjusting the connection between the short-circuit fitting and the corresponding turn of the coil winding in the coil, the real-time adjustment of the number of energized coil turns can be realized, and further the magnetic field generated by the energized coil can be adjusted in real time, which can cope with different working conditions. There is no need to replace the coil windings with different numbers of turns to adjust the magnetic field. The operation is simple, the use process is simplified, and the overall efficiency of tubing demagnetization is improved. Description of the Drawings

[0029] Figure 1 Schematic diagram of the overall structure of an embodiment of the oil pipe magnetic elimination sleeve of the present utility model in a non-inserted state;

[0030] Figure 2 Schematic diagram of the overall structure of an embodiment of the oil pipe magnetic elimination sleeve of the present utility model in an inserted state.

[0031] In the figure: 1. Coil winding; 2. Positive terminal; 3. Negative terminal; 4. Short-circuit fitting; 5. Oil pipe to be demagnetized; 6. Sleeve; 7. Plugging boss; 8. Plugging hole; 9. Spiral groove; 10. Flexible wire. Specific embodiments

[0032] The features and performance of the present utility model will be further described in detail below in conjunction with embodiments.

[0033] Embodiment of the oil pipe magnetic elimination sleeve of the present utility model:

[0034] In the prior art, the means of demagnetizing the oil pipe is usually to manually wind a coil on the surface of the oil pipe and energize the coil to generate a magnetic field. If the magnetic field strength generated needs to be adjusted during use, different numbers of turns of the coil winding need to be replaced after power-off, and this process is complicated to operate, resulting in low demagnetization efficiency of the oil pipe. To solve this problem, the present utility model proposes an oil pipe magnetic elimination sleeve. By short-circuiting the unused turns of the coil winding 1, the generated magnetic field strength can be adjusted, and by adjusting the number of turns of the coil short-circuited in real time, the real-time adjustment of the generated magnetic field strength can be realized.

[0035] Refer to Figures 1 to 2 , as a basic embodiment of the present utility model, the oil pipe magnetic elimination sleeve of the present utility model includes a coil winding 1. One end of the coil winding 1 is connected to a positive terminal 2, and the other end is connected to a negative terminal 3. A short-circuit fitting 4 is connected to the positive terminal 2 or the negative terminal 3. The short-circuit fitting 4 can be connected to any turn of the coil in the coil winding 1. When the short-circuit fitting 4 is connected to a certain turn of the coil in the coil winding 1, all the coils between the coil and the corresponding terminal connected to the short-circuit fitting 4 are short-circuited. At this time, the short-circuit fitting 4 is separated from the coil, and the short-circuit fitting 4 is connected to the coil adjacent to this coil, then the number of turns of the short-circuited coil will increase or decrease by 1 turn, and the generated magnetic field will also increase or decrease accordingly. In this way, the real-time adjustment of the magnetic field strength can be realized, and its technical principle is:

[0036] It is set that the short - circuit fitting 4 is connected to the negative terminal 3. When the short - circuit fitting 4 is not connected to any coil, the coil winding 1 between the positive terminal 2 and the negative terminal 3 is completely connected, that is, all the turns of the coil winding 13 can be energized and generate a magnetic field. When the short - circuit fitting 4 is connected to one of the coils, the coil winding 1 between the positive terminal 2 and the short - circuit fitting 4 is connected, and the coil winding 1 between the short - circuit fitting 4 and the negative terminal 3 is short - circuited by the short - circuit fitting 4. That is, only the part of the coil winding 13 between the positive terminal 2 and the short - circuit plug 8 will be energized to generate a magnetic field.

[0037] When the short - circuit fitting 4 is out of use, the number of turns of the coil winding 1 is the largest and the generated magnetic field intensity is the strongest. When the short - circuit fitting 4 is connected to the coil, the closer the short - circuit fitting 4 is to the negative terminal 3, the more turns of the coil winding 1 that can be energized, and the stronger the generated magnetic field intensity. On the contrary, the closer the short - circuit fitting 4 is to the positive terminal 2, the fewer turns of the coil winding 1 that can be energized, and the correspondingly smaller the generated magnetic field intensity. Then, when using this device, the connection between the short - circuit fitting 4 and which turn of the coil can be adjusted according to the magnetic field intensity in the demagnetization - required oil pipe 5.

[0038] According to the electromagnetic intensity calculation formula: H = N×I / Le

[0039] In the formula, H - - magnetic field intensity

[0040] N - - number of turns of the coil winding 1

[0041] I - - current intensity

[0042] Le - - magnetic path length

[0043] The electromagnetic intensity generated by the present utility model is proportional to the number of turns of the coil winding 1 and the current intensity, and inversely proportional to the distance between the coil winding 1 and the demagnetization - required oil pipe 5. During the actual use process, the magnetic field intensity can be changed by adjusting the number of turns of the coil winding 1 and the current intensity, and the magnetic field polarity can be changed by adjusting the direction of the positive and negative poles, so as to make the magnetic field intensity consistent with that of the demagnetization - required oil pipe 5 and the magnetic field polarity opposite to that of the oil pipe magnetic field, thus achieving the purpose of demagnetization; for achieving the best demagnetization purpose, the design principle of the present utility model ensures that the coil winding 1 and the demagnetization - required oil pipe 5 tend to be in a close state to reduce the size of Le.

[0044] As a preferred embodiment of the present utility model, the coil winding 1 is disposed on the outer wall of the sleeve 6. The sleeve 6 is made of insulating material. The sleeve 6 is divided into two halves along the radial direction, and the coil winding 1 on the outer wall of the sleeve 6 is also correspondingly separated to form a split structure. A lap joint conductive structure is arranged between the two split parts of the coil winding 1. When the sleeve 6 divided into two halves is buckled, the lap joint conductive structure can electrically connect the split coil winding 1. The degaussing oil pipe 5 can be placed in the buckled sleeve 6. At this time, when the coil winding 1 is energized, a magnetic field can be generated to degauss the degaussing oil pipe 5.

[0045] As a preferred embodiment of the present utility model, the lap joint conductive structure includes a plugging boss 7 and a plugging hole 8. The plugging boss 7 and the plugging hole 8 are respectively arranged on the two split parts of the coil winding 1. The plugging boss 7 corresponds to the plugging hole 8 and can be inserted into the plugging hole 8. At the same time, the plugging boss 7 can also be connected to the short-circuit fitting 4. The length of the plugging boss 7 is greater than the length of the plugging hole 8. The plugging hole 8 is set as a through hole. Then when the plugging boss 7 is inserted into the plugging hole 8, the plugging boss 7 will pass through the plugging hole 8 and extend out of the plugging hole 8. At this time, the short-circuit fitting 4 is set as a socket, and the part of the plugging boss 7 extending out of the plugging hole 8 forms a connection head that can cooperate with the short-circuit fitting 4. The short-circuit fitting 4 can be plugged on this connection head, that is, the connection between the short-circuit fitting 4 and a certain turn of the coil of the coil winding 1 is realized, so that all the coils between the turn of the coil connected to the short-circuit fitting 4 and the wiring terminal are short-circuited. In other embodiments, the length of the plugging boss 7 can also be set to be less than the length of the plugging hole 8. Then one end of the plugging hole 8 away from the plugging boss 7 serves as the connection hole of the short-circuit fitting 4. When the plugging boss 7 is inserted into the plugging hole 8, there is a certain distance between the plugging boss 7 and the connection hole. At this time, the short-circuit fitting 4 is set as a plug pin, and the short-circuit fitting 4 is inserted from the connection hole and forms a plugging connection with the plugging boss 7, which also realizes the connection between the short-circuit fitting 4 and a certain turn of the coil of the coil winding 1.

[0046] As a preferred embodiment of the present utility model, a spiral groove 9 is arranged on the outer wall of the sleeve 6, and the coil winding 1 is embedded in the spiral groove 9. The coil winding 1 uses a copper insulated cable, and its conductivity is similar to that of the welding target wire. In other embodiments, the coil winding 1 can also be connected to the spiral groove 9 by welding or other means, as long as the coil winding 1 can be connected and positioned with the spiral groove 9. This embodiment is a non-essential technical means for solving the technical problem, and the presence or absence thereof does not affect the adjustment of the magnetic field strength.

[0047] As a preferred embodiment of the present utility model, the short-circuit fitting 4 is electrically connected to the terminal through a flexible wire 10. The flexible wire 10 is made of copper material, or other materials can also be used as long as it can be electrically connected to the terminal and the short-circuit fitting 4. A DC power supply is provided between the positive and negative terminals 3. The DC power supply is a regulated DC power supply. When the power supply is turned on, the current flows through the positive terminal 2, the coil winding 1, the short-circuit fitting 4, the flexible wire 10 and the negative terminal 3 to form a current loop. This current loop can be used as a degaussing system. By changing the voltage value of the regulated DC voltage, the magnitude of the current generated in the coil winding 1 can be adjusted. At the same time, by changing the connection of the positive and negative polarities, the direction of the magnetic field generated by the coil winding 1 can be changed, which is convenient for degaussing the oil pipe 5 to be degaussed.

[0048] The using method of the oil pipe magnetic elimination sleeve of the present utility model is as follows: The sleeve 6 divided into two halves is buckled on the outside of the oil pipe 5 to be degaussed. During this process, the plugging boss 7 and the plugging hole 8 are plugged into each other. Subsequently, the short-circuit fitting 4 is plugged into any one of the plugging bosses 7. The regulated DC power supply is turned on, and the coil winding 1 between the positive terminal 2 and the short-circuit fitting 4 is energized to generate a magnetic field. The magnetic field intensity generated by the coil winding 1 can be adjusted by adjusting the position of the short-circuit fitting 4 and the voltage of the regulated DC power supply until the magnetic field generated by the coil winding 1 cancels out the magnetic field in the oil pipe 5 to be degaussed, thereby realizing the degaussing of the oil pipe 5 to be degaussed.

[0049] The implementation mode of the oil pipe magnetic elimination system of the present utility model:

[0050] The oil pipe magnetic elimination system of the present utility model includes the oil pipe magnetic elimination sleeve of the present utility model, and the positive and negative terminals of the oil pipe magnetic elimination sleeve are connected to a DC power supply. The DC power supply is a prior art and will not be elaborated here.

[0051] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The scope of patent protection of the present utility model is subject to the claims. All equivalent structural changes made by using the description and drawings of the present utility model should be included in the protection scope of the present utility model by the same token.

Claims

1. A tubing magnetic elimination casing, characterized in that: It includes a coil winding, one end of the coil winding is connected with a positive terminal, and the other end is connected with a negative terminal. At least one of the positive terminal and the negative terminal is connected with a short-circuit fitting, and the short-circuit fitting is used to connect with any turn of the coil winding to short-circuit part of the coil.

2. The magnetic elimination casing for tubing according to claim 1, wherein: The coil winding is arranged on a sleeve, the sleeve is divided into two halves along the radial direction, and each turn of the coil winding is separated at the butt joint of the sleeve to form a split structure, and a lap joint conductive structure is arranged between the two split parts.

3. The tubing magnetic elimination casing according to claim 2, wherein: The lap joint conductive structure is a plugging boss and a corresponding plugging hole respectively arranged on the two split parts of the coil.

4. The tubing magnetic elimination casing according to claim 3, wherein: The plugging hole is a through hole, and one end of the through hole far from the plugging boss constitutes the connection hole of the short-circuit fitting.

5. The tubing magnetic elimination casing according to claim 4, characterized in that: The short-circuit fitting is a pin that can be plugged into the connection hole.

6. The tubing magnetic elimination casing according to claim 3, characterized in that: The length of the plugging boss is greater than the length of the corresponding plugging hole. When plugged into the corresponding plugging hole, the plugging boss passes through the plugging hole to form a connection head that cooperates with the short-circuit fitting.

7. The tubing magnetic elimination casing according to claim 6, characterized in that: The short-circuit fitting is a socket that can be plugged into the connection head.

8. The tubing magnetic elimination casing according to claim 1, wherein: The short-circuit fitting is electrically connected with the corresponding terminal through a flexible wire.

9. The magnetic elimination casing for tubing according to claim 2, wherein: A spiral groove is arranged on the outer wall surface of the sleeve, and the coil winding is arranged in the spiral groove.

10. The tubing magnetic elimination casing according to claim 1, wherein: The coil winding is a copper insulated cable.

11. Magnetic elimination system for oil pipes, characterized in that: It includes the tubing magnetic elimination sleeve according to any one of claims 1-10, and the tubing magnetic elimination sleeve is connected with a DC power supply through its positive and negative terminals.

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