Thermal insulation magnet yoke for online detection of high-temperature workpiece

Abstract

The utility model relates to the technical field of nondestructive testing of high-temperature workpieces, in particular to a heat-insulating magnet yoke for online detection of high-temperature workpieces, which comprises a yoke-shaped iron core and magnet exciting coils, an efficient heat-insulating material is wrapped outside the yoke-shaped iron core, and the magnet exciting coils are arranged at two ends of the efficient heat-insulating material. The efficient heat insulation material is composed of a heat insulation part, a bent connecting part and a linear connecting part, and the magnet exciting coil is wound on the heat insulation part of the efficient heat insulation material. According to the heat insulation magnet yoke for online detection of the high-temperature workpiece, the situation that heat of the high-temperature workpiece is conducted to the magnet exciting coil through the yoke-shaped iron core, consequently, the coil is heated and damaged, and electric leakage is caused is effectively avoided, and the industrial problem that a large number of detection units cannot conduct online detection of high-temperature equipment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of nondestructive detection of high-temperature workpieces, in particular to a heat-insulating magnetic yoke for online detection of high-temperature workpieces. Background Art

[0002] Magnetic particle testing is a method of observing the magnetic traces formed by magnetic powder gathering at the leakage point to identify defects, and it is widely used. However, existing magnetic particle testing methods are all based on inspections carried out when the workpiece is at room temperature. Currently, high-temperature workpieces must be fully shut down and cooled for inspection. However, many key equipment and core pipelines cannot be shut down or the shutdown time is very short, and they do not have the conditions to cool to room temperature for inspection. Therefore, it is necessary to develop an online magnetic particle inspection process for high-temperature workpieces. The inspected workpiece can be in a high-temperature working environment and normal magnetic particle inspection can still be carried out without affecting the inspection results and their accuracy.

[0003] At present, the existing magnetic particle detection under high temperature conditions has the following technical problems: the yoke core in the high temperature working environment will conduct heat to the excitation coil, causing the excitation coil to be damaged by heat and short-circuit leakage, endangering the safety of the operator. Summary of the invention

[0004] The main purpose of the utility model is to overcome the deficiencies in the prior art and provide a heat-insulating yoke for online detection of high-temperature workpieces.

[0005] The technical solution adopted by the utility model to achieve its technical purpose is: an insulating magnetic yoke for online detection of high-temperature workpieces, including a yoke-shaped iron core and an excitation coil, the outside of the yoke-shaped iron core is wrapped with a high-efficiency thermal insulation material, and the excitation coil is arranged at both ends of the high-efficiency thermal insulation material; the high-efficiency thermal insulation material is used for thermal insulation treatment of the electromagnetic yoke, the yoke-shaped iron core is stacked with soft magnetic materials for transmitting magnetic lines of force to provide a uniform magnetic field, and the excitation coil is used for energizing to generate an electromagnetic field.

[0006] The high-efficiency heat-insulating material consists of a heat-insulating portion, a bent connecting portion and a straight connecting portion;

[0007] The excitation coil is wound on the heat insulating portion of the high-efficiency heat insulating material.

[0008] Preferably, the thermal insulation part is sleeved on the vertical parts at both ends of the yoke-shaped iron core, the bent connecting part is sleeved on the bent part of the yoke-shaped iron core, and the straight connecting part is sleeved on the straight part of the yoke-shaped iron core; by arranging the high-efficiency thermal insulation material in sections, the high-efficiency thermal insulation material can be easily wrapped on the outside of the yoke-shaped iron core. At the same time, according to the different specifications of the yoke-shaped iron core, multiple thermal insulation parts, bent connecting parts and straight connecting parts can be combined and connected to improve their applicability.

[0009] One end of the bent connection portion is magnetically connected to the heat insulation portion, and the other end is magnetically connected to the straight connection portion, and the magnetic connection can facilitate installation and disassembly.

[0010] Preferably, a magnet ring is fixedly provided on the outer wall of one end of the heat insulation part;

[0011] The outer walls at both ends of the bent connection portion are fixedly provided with first magnetic attraction rings;

[0012] The outer walls at both ends of the straight connecting portion are fixedly provided with second magnetic attraction rings;

[0013] The magnet ring is adsorbed on the first magnetic attraction ring, and the first magnetic attraction ring and the second magnetic attraction ring are attracted to each other by opposite poles.

[0014] Preferably, one side of the bent connection portion is opened, and two first magnetic strips with opposite polarities attracting each other are fixedly arranged on the outer wall of one side;

[0015] One side of the straight connecting portion is also provided with an opening, and two second magnetic strips of oppositely attracted magnetic properties are fixedly provided on the outer wall of one side;

[0016] By disposing the first magnetic strip and the second magnetic strip, the opening can be closed after the bent connection part and the straight connection part are sleeved on the outside of the yoke-shaped iron core.

[0017] Preferably, the high-efficiency thermal insulation material is configured as a porous vacuum silicon thermal insulation material, and according to the thermal insulation performance curve of the material, a thinner material is used while ensuring the thermal insulation effect.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The thermal insulation yoke for online inspection of high-temperature workpieces effectively prevents the heat of the high-temperature workpiece from being transferred to the excitation coil through the yoke core, causing the coil to be damaged and leaking electricity, solving the industry problem that a large number of inspection units are unable to conduct online inspection and testing of high-temperature equipment. At the same time, the thermal insulation yoke has been subjected to heat resistance tests to determine the high-temperature operating time limit of the thermal insulation yoke, which can guide the magnetic particle inspection process, and the use of a thinner thickness under the premise of ensuring the thermal insulation effect of the high-efficiency thermal insulation material can ensure the lifting force of the thermal insulation yoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the thermal insulation yoke.

[0021] Figure 2 This is a schematic diagram of the main structure after the high-efficiency thermal insulation material in the thermal insulation yoke is refined.

[0022] Figure 3 It is a schematic diagram of the bottom-up structure of the bent connection part and the straight connection part of the high-efficiency thermal insulation material.

[0023] in:

[0024] 1-high efficiency thermal insulation material; 101-thermal insulation part; 102-magnet ring; 103-bending connection part; 104-first magnetic attraction ring; 105-first magnetic attraction strip; 106-straight connection part; 107-second magnetic attraction strip; 108-second magnetic attraction ring; 2-yoke core; 3-excitation coil. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0026] In the description of the present utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. 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 utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0029] like Figure 1-3 As shown, a heat-insulating magnetic yoke for online detection of high-temperature workpieces includes a yoke-shaped iron core 2 and an excitation coil 3. The outside of the yoke-shaped iron core 2 is wrapped with a high-efficiency heat-insulating material 1, and the excitation coil 3 is arranged at both ends of the high-efficiency heat-insulating material 1; the high-efficiency heat-insulating material 1 is set as a porous vacuum silicon heat-insulating material, and according to the heat-insulating performance curve of the material, a thinner thickness is used under the premise of ensuring the heat-insulating effect. The high-efficiency heat-insulating material 1 is used for heat-insulating treatment of the electromagnetic yoke, the yoke-shaped iron core 2 is made of soft magnetic material for transmitting magnetic lines to provide a uniform magnetic field, and the excitation coil 3 is used for energizing to generate an electromagnetic field.

[0030] Specific as Figure 2 As shown, the high-efficiency thermal insulation material 1 is composed of a thermal insulation portion 101, a bent connection portion 103 and a straight connection portion 106; the excitation coil 3 is wound on the thermal insulation portion 101 of the high-efficiency thermal insulation material 1;

[0031] The insulation part 101 is sleeved on the vertical parts at both ends of the yoke-shaped core 2, the bent connection part 103 is sleeved on the bent part of the yoke-shaped core 2, and the straight connection part 106 is sleeved on the straight part of the yoke-shaped core 2; by arranging the high-efficiency thermal insulation material 1 in sections, the high-efficiency thermal insulation material 1 can be easily wrapped around the outside of the yoke-shaped core 2. At the same time, according to the different specifications of the yoke-shaped core 2, multiple insulation parts 101, bent connection parts 103 and straight connection parts 106 can be combined and connected to improve their applicability.

[0032] Furthermore, specifically Figure 2 As shown, one end of the bent connection portion 103 is magnetically connected to the heat insulation portion 101, and the other end is magnetically connected to the straight connection portion 106, which facilitates installation and disassembly;

[0033] A magnet ring 102 is fixedly provided on the outer wall at one end of the insulation part 101; a first magnetic attraction ring 104 is fixedly provided on the outer walls at both ends of the bending connection part 103; a second magnetic attraction ring 108 is fixedly provided on the outer walls at both ends of the straight connection part 106; the magnet ring 102 is adsorbed on the first magnetic attraction ring 104, and the first magnetic attraction ring 104 and the second magnetic attraction ring 108 are attracted to each other by opposite poles.

[0034] Furthermore, Figure 2 , 3 As shown, one side of the bent connection part 103 is opened, and a first magnetic strip 105 with oppositely attracted magnetic poles is fixedly provided on the outer wall of one side; one side of the straight connection part 106 is also opened, and a second magnetic strip 107 with oppositely attracted magnetic poles is fixedly provided on the outer wall of one side; through the arrangement of the first magnetic strip 105 and the second magnetic strip 107, the openings can be closed after the bent connection part 103 and the straight connection part 106 are sleeved on the outside of the yoke core 2.

[0035] Specifically, when in use, after assembly, the excitation coil 3 is energized, and the lifting force of the electromagnetic yoke is tested to ensure that it is greater than 45N. It is compared with other electromagnetic yokes that are not equipped with the high-efficiency thermal insulation material 1 to test the influence of the lifting force of the electromagnetic yoke, and the number of turns of the excitation coil 3 is increased to correct it;

[0036] After assembly, the electromagnetic yoke is placed on a constant temperature heating table to test the surface temperatures of the excitation coil 3, the yoke core 2, and the high-efficiency thermal insulation material 1 closest to the heat source to determine the high-temperature operating time limit of the electromagnetic yoke.

[0037] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structures, equivalent processes or equivalent functional transformations made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the scope of protection of the utility model patent.

Claims

1. A heat-insulating magnetic yoke for online detection of high-temperature workpieces, comprising a yoke-shaped iron core (2) and an excitation coil (3), characterized in that: The exterior of the yoke-shaped iron core (2) is wrapped with a high-efficiency heat-insulating material (1), and the excitation coil (3) is arranged at both ends of the high-efficiency heat-insulating material (1); The high-efficiency heat-insulating material (1) consists of a heat-insulating portion (101), a bent connecting portion (103) and a straight connecting portion (106); The excitation coil (3) is wound on the heat insulating portion (101) of the high-efficiency heat insulating material (1).

2. The thermal insulation yoke for online detection of high-temperature workpieces according to claim 1, characterized in that: The heat insulating portion (101) is sleeved on the vertical portions at both ends of the yoke-shaped iron core (2), the bent connecting portion (103) is sleeved on the bent portion of the yoke-shaped iron core (2), and the straight connecting portion (106) is sleeved on the straight portion of the yoke-shaped iron core (2); One end of the bent connection portion (103) is magnetically connected to the heat insulation portion (101), and the other end is magnetically connected to the straight connection portion (106).

3. The heat-insulating yoke for online detection of high-temperature workpieces according to claim 2, characterized in that: A magnet ring (102) is fixedly disposed on the outer wall of one end of the heat insulation portion (101); First magnetic attraction rings (104) are fixedly provided on the outer walls at both ends of the bent connection portion (103); Second magnetic attraction rings (108) are fixedly provided on the outer walls at both ends of the straight connecting portion (106); The magnetic ring (102) is adsorbed on the first magnetic attraction ring (104), and the first magnetic attraction ring (104) and the second magnetic attraction ring (108) attract each other with opposite polarities.

4. The heat-insulating yoke for online detection of high-temperature workpieces according to claim 2, characterized in that: One side of the bent connection portion (103) is provided with an opening, and two first magnetic attraction strips (105) with opposite polarities attracting each other are fixedly provided on the outer wall of one side; One side of the straight connecting portion (106) is also provided with an opening, and two second magnetic attraction strips (107) with opposite polarities attracting each other are fixedly provided on the outer wall of one side.

5. The heat-insulating yoke for online detection of high-temperature workpieces according to claim 1, characterized in that: The high-efficiency thermal insulation material (1) is configured as a porous vacuum silicon thermal insulation material.

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