CN118098816A - Annular medical transformer and processing method thereof - Google Patents

Abstract

The invention provides a processing method of a ring-shaped medical transformer. Providing an annular iron core and copper wires as coil windings; winding secondary coils on the iron core according to the number of the secondary coil groups, and performing insulation treatment among the secondary coils of each group; after the secondary coil is wound, a secondary coil outgoing line is installed, and a shielding layer is wound outside the secondary coil; winding a primary coil outside the secondary coil shielding layer according to the number of turns of the primary coil, and performing insulation treatment between each group of primary coils; and after the primary coil winding is finished, installing a primary coil outgoing line. The toroidal medical transformer includes a toroidal core, secondary and primary coils wound on the toroidal core, and an insulating material. The secondary winding is arranged outside the primary winding, the primary winding and the secondary winding are wound in two layers, and independent isolation and insulation treatment is carried out in each group of windings, so that the voltage resistance, stability and safety of the operation of the transformer can be improved, and the overall flatness of the winding coil is improved.

Description

Annular medical transformer and processing method thereof

Technical Field

The invention relates to the technical field of transformers, in particular to a ring-shaped medical transformer and a processing method thereof.

Background

The annular medical transformer is used for medical equipment and instruments in large international hospitals, emergency departments, and the like, an iron core of the medical transformer is made of high-quality cold-rolled silicon steel sheets (the thickness of the sheets is generally below 0.23-0.30 mm) in a seamless rolling mode, coils of the annular transformer are uniformly wound on the iron core, and the manufacturing process and the operation method of the annular transformer have strict requirements and specifications. Due to the special requirements of the medical industry on the performance of the transformer, the processing requirements of the annular medical transformer are also 8% higher than those of the traditional industry.

Annular medical transformers are used in hospital settings for medical devices, including instruments, equipment, appliances, in vitro diagnostic reagents and calibrators, materials and other similar or related items for direct or indirect use on the human body; energy therapy devices, diagnostic monitoring devices, fluid delivery devices, ionizing radiation devices, implant devices, other active contact devices. The transformer is required to have safe and reliable performance, and noise, radiation and magnetic leakage are avoided.

In the prior art, a transformer core is positioned inside a winding, the winding is wound in layers, a primary winding is wound first, and then a secondary winding is wound inside the primary winding. The patent 201110330066.3 discloses a high-power toroidal transformer, which comprises a toroidal core, a primary coil and a secondary coil which are sequentially wound on the toroidal core, wherein the primary coil is positioned in the secondary coil. After winding of one layer of windings is finished, winding group connection is processed by a oblique pulling method.

Patent 201410706860.7 discloses a high transmission rate 1553B bus coupling transformer and a winding process thereof, wherein the transformer comprises an annular magnetic core, a primary winding is formed on the outer side surface of the annular magnetic core, an insulating tape is stuck on the side surface of the primary winding, and a secondary winding is wound along the annular magnetic core outside the insulating tape. This structure winds the primary winding and the secondary winding all around the toroidal core, and interference is easily generated between the primary winding and the secondary winding.

The processing technology of the middle ring transformer in the prior art is easy to cause the unevenness of the transformer product, and the primary coil is positioned inside to easily cause the instantaneous surge of the transformer, thus forming the use noise and affecting the use of the transformer.

The processing technology in the prior art is suitable for processing transformers with low requirements on working performance. However, the medical transformer has long service life, possibly works continuously for 24 hours, and requires low using noise and stable working performance.

Disclosure of Invention

The invention aims to solve one of the technical problems, and provides a reactor base size detection tool for detecting a gap of a mounting hole of a reactor base.

In order to achieve the above purpose, the invention adopts the following technical scheme:

Some embodiments of the present invention provide a method for processing a toroidal medical transformer, comprising the steps of:

Providing an annular iron core and copper wires as coil windings;

Winding secondary coils on the iron core according to the number of the secondary coil groups, and performing insulation treatment among the secondary coils of each group;

After the secondary coil is wound, a secondary coil outgoing line is installed, and a shielding layer is wound outside the secondary coil;

Winding a primary coil outside the secondary coil shielding layer according to the number of turns of the primary coil, and performing insulation treatment between each group of primary coils;

and after the primary coil winding is finished, installing a primary coil outgoing line.

In some embodiments of the invention, a copper foil is wound on the outer side of the secondary coil as a shielding layer, and the copper foil is subjected to grounding treatment.

In some embodiments of the invention, the method further comprises the steps of: insulating tapes are adhered to the two edges of the inner ring and the two edges of the outer ring in the circumferential direction of the annular iron core.

In some embodiments of the present invention, a copper foil is wound around the outside of the primary coil as a shield layer, and the copper foil is grounded.

In some embodiments of the present invention, after the primary coil lead-out wire is installed, the annular inner cavity of the annular iron core is subjected to glue filling treatment.

In some embodiments of the invention, the glue filling height is flush with the side surface of one side and lower than the height of the side surface of the other side relative to the two side surfaces of the annular medical transformer in the circumferential direction.

In some embodiments of the invention, the method further comprises the steps of: before winding the secondary coil, checking the toroidal core, comprising: whether the surface of the iron core is smooth or not, and whether the edge of the iron core ring is provided with a round angle or not.

Some embodiments of the present invention further provide a toroidal medical transformer, which is obtained by the above-described toroidal medical transformer processing method, comprising:

An annular iron core;

Secondary coil: the device is arranged around the outer wall of the annular iron core, insulating pieces are arranged between adjacent groups of secondary coils, and each group of secondary coils is connected with a secondary coil outgoing line;

primary coil: the secondary coil is arranged on the outer side of the secondary coil in a surrounding mode, insulating pieces are arranged between adjacent groups of primary coils, and each group of primary coils is connected with a primary coil outgoing line.

In some embodiments of the invention, the secondary coil is externally provided with a secondary coil shield.

In some embodiments of the invention, the primary coil is externally provided with a primary coil shield.

Compared with the prior art, the annular medical transformer and the processing method thereof provided by the invention have the technical advantages that:

1. The invention improves the winding process method of the annular transformer, the secondary winding is arranged inside, the primary winding is arranged outside, the primary winding and the secondary winding are wound in two layers, and each group of windings is subjected to independent isolation and insulation treatment, so that the voltage resistance, the stability and the safety of the operation of the transformer can be improved, and the flatness of the whole winding coil is improved.

2. The point shielding copper layer is additionally arranged outside the primary winding and the secondary winding, so that the stability of a product can be improved, and the requirements of closing protection, electrostatic protection, radiation protection and magnetic leakage protection of the medical transformer are met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a toroidal transformer circuit schematic;

fig. 2 is a schematic diagram of the toroidal transformer after the primary winding is completed;

Fig. 3 is a schematic diagram of a toroidal transformer after glue filling;

FIG. 4 is a schematic diagram of a toroidal transformer;

In the above figures:

1-copper foil;

2-filling the glue layer;

3-outgoing lines;

4-primary coil outgoing lines;

5-secondary coil lead-out wire.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "disposed on," "connected to," another element, it can be directly on the other element or be 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 be indirectly connected to the other element.

It should be understood that the direction or positional relationship indicated by the terms "upper", "lower", "bottom", etc. are based on the direction or positional relationship shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Some embodiments of the invention provide a method for processing a ring medical transformer, which comprises the following steps.

S1: material preparation.

Providing a toroidal core, providing copper wire as coil windings, providing mylar, dupont, mylar, etc. as insulation material. The center of the annular iron core is a circular hole, and the annular iron core is used for winding a coil.

Before winding, checking whether the toroidal core meets specifications, including: whether the iron core size meets the requirement, whether the iron core surface is smooth, whether burrs exist, and whether the edge of an iron core ring is provided with a round angle. And checking whether the copper wire meets the requirements, including whether the specification and the model of the enameled wire are consistent with the single number, whether the packaging is perfect, whether the identification is clear, and the like. And checking whether the thickness of the polyester film meets the requirement, and whether the width dimension is consistent with the number table.

In some embodiments of the present invention, before the coil is wound, polyimide tapes are wrapped around four edges of the core, that is, insulating tapes are attached to both edges of the inner ring and both edges of the outer ring in the circumferential direction of the toroidal core. The adhesive tape is required to be uniformly adhered as much as possible, the edge of the iron core is completely wrapped, the edge is not exposed, the overlapping of the adhesive tape is reduced as much as possible, and fewer packages or more packages cannot be used.

The iron core with the adhesive tape stuck can be used for standby, and the iron core can be transported to a processing station by adopting a turnover vehicle.

S2: and winding the secondary coil.

Winding secondary coils on the iron core according to the number of the secondary coil groups, and performing insulation treatment among the secondary coils of each group; after the secondary coil is wound, a secondary coil outgoing line is installed, and a shielding layer is wound outside the secondary coil. The end part of the coil is attached to the surface of the annular iron core, penetrates out to the other surface of the annular iron core from the central hole of the annular iron core, is wound on the iron core and returns to the position of the end part of the coil. The winding method is repeated, and a secondary coil is wound at a position where the secondary coil is attached to the surface of the iron core.

Taking a transformer with three groups of secondary coils as an example, firstly winding one group of secondary coils around the surface of an iron core, after winding is finished, insulating the group of coils by using an insulating tape, then sequentially winding two groups of secondary coils on the surface main of the iron core, and insulating each group of coils by using an insulating tape. And after the winding of the three groups of secondary coils is finished, performing current treatment on the whole of the three groups of secondary coils, and positioning the secondary coil outgoing lines 5. The end part of the outgoing line is subjected to paint removal treatment, and the paint removal length is 15mm-17mm. The outgoing lines are required to be ensured to be attractive and parallel, and the performance is good.

And after winding is finished, testing whether the number of turns of the secondary winding meets the requirement.

In some embodiments of the present invention, after all secondary coils are wound, copper foil is wound outside the secondary coils as a shielding layer, and the copper foil is grounded. The copper foil is a processed plastic tape-shaped sheet and is wound on the outer side of the secondary winding.

S3: the primary coil is wound.

Winding a primary coil outside the secondary coil shielding layer according to the number of turns of the primary coil, and performing insulation treatment between each group of primary coils; and after the primary coil winding is finished, installing a primary coil outgoing line.

Taking 8 groups of primary coils as an example, a group of primary coils are wound around the secondary coils, after winding is finished, the group of coils are insulated by an insulating tape, seven groups of secondary coils are sequentially wound, and each group of coils is insulated by an insulating tape. And after the winding of the seven groups of secondary coils is finished, performing current treatment on the whole of the seven groups of secondary coils, and positioning the primary coil outgoing lines 4. The outgoing line 3 is required to be ensured to be attractive and parallel, and the performance is good.

Referring to fig. 1, a schematic circuit diagram of a toroidal transformer according to this embodiment uses line interfaces of different colors to distinguish between the primary coil and the secondary coil. The left side corresponds to the primary winding, and the right side corresponds to the secondary winding.

In some embodiments of the present invention, after all primary coils are wound, the copper foil 1 is wound outside the primary coils as a shielding layer, and the copper foil 1 is grounded. The copper foil is a processed plastic tape-shaped sheet and is wound on the outer side of the secondary winding.

Referring to fig. 2, a schematic diagram of the product structure after the primary coil is wound with copper foil is shown.

S4: and (5) glue filling and sealing treatment.

After the primary coil outgoing line is installed, the secondary coil and the primary coil are completely wound, and the annular inner cavity of the shaped iron core is subjected to glue pouring treatment.

And in the glue filling process, the material glue filling tool is used for filling glue after the glue filling material is heated at 60-80 ℃, the environmental temperature is controlled to be 18-28 ℃, the glue filling tool is taken down after the product is placed for 24 hours and cured, sundries and bubbles cannot be contained on the glue filling surface, the flatness of the surface of the glue filling is good, and the glue filling is qualified after the test hardness is 70-80 HD.

The middle hole of the annular transformer is usually filled with glue, so that the vibration of an iron core and a winding caused by alternating current can be reduced, and the noise of the transformer is reduced; colleagues are also beneficial to heat conduction and dissipation. It is generally necessary to form a connecting hole in the middle hole after the glue is filled into the middle hole of the toroidal transformer, so as to facilitate the installation of the toroidal transformer and other devices.

Referring to fig. 3, in some embodiments of the present invention, the glue filling height is flush with one side surface and lower than the other side surface with respect to both side surfaces in the circumferential direction of the annular medical transformer.

The second embodiment of the present invention further provides a toroidal medical transformer, which is obtained by the above-mentioned toroidal medical transformer processing method, comprising:

An annular iron core;

Secondary coil: the device is arranged around the outer wall of the annular iron core, insulating pieces are arranged between adjacent groups of secondary coils, and each group of secondary coils is connected with a secondary coil outgoing line;

primary coil: the secondary coil is arranged on the outer side of the secondary coil in a surrounding mode, insulating pieces are arranged between adjacent groups of primary coils, and each group of primary coils is connected with a primary coil outgoing line.

The isolation protection and the ground protection are carried out between each winding of the whole transformer, and meanwhile, the vibration of the iron core and the winding caused by alternating direct current can be reduced.

In some embodiments of the present invention, a secondary coil shielding layer is disposed outside the secondary coil, and copper foil is used as the shielding layer. The secondary coil shielding layer is positioned outside the secondary coil, and a shielding layer is added between the secondary coil and the primary coil and between the primary coil and the secondary coil; the protection of the power supply device during instant starting of the current of the wave generator is facilitated. When the power is turned on, the instantaneous current changes by 6-8 times of the rated current. Meanwhile, the transformer is safer to use, has low noise and low current sound.

In some embodiments of the present invention, the primary coil is provided with a primary coil shielding layer on the outside, and copper foil 1 is used as the shielding layer.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (10)

1. A method for processing a ring-shaped medical transformer, which is characterized by comprising the following steps:

Providing an annular iron core and copper wires as coil windings;

Winding secondary coils on the iron core according to the number of the secondary coil groups, and performing insulation treatment among the secondary coils of each group;

After the secondary coil is wound, a secondary coil outgoing line is installed, and a shielding layer is wound outside the secondary coil;

Winding a primary coil outside the secondary coil shielding layer according to the number of turns of the primary coil, and performing insulation treatment between each group of primary coils;

and after the primary coil winding is finished, installing a primary coil outgoing line.

2. The method of manufacturing a toroidal medical transformer according to claim 1, wherein a copper foil is wound around the outside of the secondary coil as a shield layer, the copper foil being subjected to a grounding treatment.

3. The method of manufacturing a toroidal medical transformer according to claim 1, further comprising the steps of: insulating tapes are adhered to the two edges of the inner ring and the two edges of the outer ring in the circumferential direction of the annular iron core.

4. The method of manufacturing a toroidal medical transformer according to claim 1, wherein a copper foil is wound around the outside of the primary coil as a shield layer, the copper foil being subjected to a grounding treatment.

5. The method for manufacturing a toroidal medical transformer according to claim 1 or 4, wherein after the primary coil lead-out wire is installed, the toroidal cavity of the toroidal core is subjected to a potting process.

6. The method of manufacturing a toroidal medical transformer according to claim 5, wherein the potting height is flush with one side surface and lower than the other side surface with respect to both side surfaces in the circumferential direction of the toroidal medical transformer.

7. The method of manufacturing a toroidal medical transformer according to claim 1, further comprising the steps of: before winding the secondary coil, checking the toroidal core, comprising: whether the surface of the iron core is smooth or not, and whether the edge of the iron core ring is provided with a round angle or not.

8. A toroidal medical transformer, characterized in that it is obtained by a method according to any one of claims 1-7, comprising:

An annular iron core;

Secondary coil: the device is arranged around the outer wall of the annular iron core, insulating pieces are arranged between adjacent groups of secondary coils, and each group of secondary coils is connected with a secondary coil outgoing line;

primary coil: the secondary coil is arranged on the outer side of the secondary coil in a surrounding mode, insulating pieces are arranged between adjacent groups of primary coils, and each group of primary coils is connected with a primary coil outgoing line.

9. The toroidal transformer of claim 8, wherein a secondary coil shield is disposed externally of the secondary coil.

10. The toroidal transformer of claim 8, wherein a primary coil shield is disposed externally of the primary coil.