Resin encapsulation insulation type high-voltage isolation transformer

Abstract

The utility model discloses a resin encapsulation insulation type high-voltage isolation transformer which comprises a transformer shell and a cover body, the inner walls of the left side and the right side of the transformer shell are each fixedly connected with a pair of transverse rods, vertical plates are installed on the outer walls of the adjacent transverse rods, abutting mechanisms are installed on the outer walls of the vertical plates, a connecting mechanism is installed below the cover body, and the connecting mechanism is connected with the transformer shell. The utility model relates to the technical field of electrical equipment, an ejector rod can be extruded outwards, the ejector rod drives a vertical plate to move on a cross rod through a connecting rod, the vertical plate is matched with a transformer shell to extrude a spring, the spring is elastically deformed, then a U-shaped iron core is moved into the transformer shell, the ejector rod is loosened, and the U-shaped iron core is fixed. When the U-shaped iron core is fixed, the ejector rod is reset under the action of elastic force of the spring, so that the U-shaped iron core is propped against and fixed, an operator does not need to pull the U-shaped iron core through the primary coil all the time, the labor intensity is reduced, and the subsequent curing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a resin-potted insulation type high-voltage isolation transformer. Background Art

[0002] A high-voltage isolation transformer refers to a transformer with electrical isolation between the input winding and the output winding. The isolation transformer is used to avoid accidental contact with live objects at the same time. The isolation of the transformer is to isolate the current of the primary and secondary windings. The interior is usually insulated with resin potting. It is widely used in the control power supply, safety lighting and indicator light power supply of general circuits in the electronics industry or industrial and mining enterprises, machine tools and mechanical equipment.

[0003] For example, a high-frequency high-voltage transformer with publication number CN207781333U includes a transformer body and a housing. The utility model has low loss, high efficiency, small size, light weight, simple structure, and is suitable for various environments;

[0004] The high-frequency high-voltage transformer is a transformer in which two U-shaped cores are connected to each other inside a shell body, and epoxy resin is used for overall glue pouring and curing. However, after the U-shaped core is installed inside the shell body, since there is no structure for fixing the U-shaped core inside the shell body, an operator needs to hold the core through the primary coil during glue pouring and curing. This is not only labor-intensive, but also causes shaking of the operator's hands when the operator maintains an action for a long time, thereby reducing the subsequent curing effect. In view of this, it is very necessary to design a resin-potted insulated high-voltage isolation transformer to solve this problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a resin-potted insulated high-voltage isolation transformer, which solves the problem of the existing high-frequency high-voltage transformer. After the U-shaped iron core is installed inside the outer shell body, since there is no structure for fixing the U-shaped iron core inside the outer shell body, the operator needs to hold the iron core through the primary coil all the time during the pouring and curing process, which not only requires a lot of labor, but also causes shaking of the operator's hands when the operator maintains one action for a long time, thereby reducing the subsequent curing effect.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a resin-encapsulated insulated high-voltage isolation transformer, comprising a transformer shell and a cover body, the upper surface of the transformer shell is fitted with the cover body, the left and right inner walls of the transformer shell are fixedly connected with a pair of cross bars, and the other end of the cross bar is fixedly connected with a stopper, a pair of first rectangular blocks are fixedly connected to the lower left and right sides of the transformer shell, and the internal threads of the first rectangular blocks are connected with bolts, the outer walls of the adjacent cross bars are installed with vertical plates, and the inner walls of the through holes of the vertical plates are gap-matched with the outer walls of the cross bars, the outer walls of the vertical plates are installed with a tightening mechanism, and a connecting mechanism is installed below the cover body.

[0007] Preferably, the clamping mechanism includes a spring fixed to the vertical plate and the inner wall of the transformer housing, a pair of connecting rods are fixed to the upper and lower inner sides of the vertical plate, a push rod is fixed to the outer walls of adjacent connecting rods, a pair of U-shaped iron cores are installed on the inner sides of the left and right push rods, the left and right U-shaped iron cores are bonded together, the outer wall of the U-shaped iron core is sleeved with a sheath, and the outer wall of the sheath is in contact with the push rod.

[0008] Preferably, a primary coil is wound around the upper outer wall of the U-shaped iron core, and the upper outer wall of the primary coil is gap-matched with the inner wall of the through hole of the cover body.

[0009] Preferably, a secondary coil is wound around the lower outer wall of the U-shaped iron core, and a front end outer wall of the secondary coil is fixedly connected to the interior of the transformer housing.

[0010] Preferably, the interior of the transformer housing is filled with sealing material.

[0011] Preferably, the connecting mechanism includes two pairs of screws fixed to the left and right outer walls of the lower surface of the cover body, the outer walls of the screws are installed with second rectangular blocks fixed to the transformer housing, and the outer walls of the second rectangular block are gap-matched with the outer walls of the screws, a nut is threadedly connected to the lower outer wall of the screw, a gasket is fitted between the nut and the second rectangular block, and the inner wall of the gasket is gap-matched with the outer wall of the screw.

[0012] Beneficial Effects

[0013] The utility model provides a resin-encapsulated high-voltage isolation transformer, which has the following beneficial effects:

[0014] The two U-shaped cores can be bonded together, and the primary coil and the secondary coil are then wound onto the sheath of the U-shaped core. The top rod is then squeezed outward so that the top rod drives the vertical plate to move on the horizontal rod through the connecting rod. The vertical plate cooperates with the transformer housing to squeeze the spring, causing the spring to undergo elastic deformation. The U-shaped core is then moved into the transformer housing, and the top rod is loosened so that the top rod is reset under the elastic force of the spring, thereby tightly fixing the U-shaped core. The secondary coil is then passed through the front end of the transformer housing and fixed by sealant, etc., and sealing material is poured into the transformer housing to perform overall glue filling and curing. When the sealing material is cured, the screw is driven through the cover plate to penetrate into the through hole of the second rectangular block, and the primary coil is passed through the through hole of the cover plate, and the gasket and the nut are then installed on the screw rod in sequence, and the cover plate is fixed. The overall installation is completed, so that the operator does not need to hold the U-shaped core through the primary coil all the time, which reduces the degree of labor and improves the subsequent curing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a plan cross-sectional view of the utility model.

[0017] Figure 3 It is a partially enlarged schematic diagram of the utility model.

[0018] Figure 4 It is a partially enlarged schematic diagram of the utility model.

[0019] In the figure: 1. transformer housing; 2. cover; 3. cross bar; 4. block; 5. first rectangular block; 6. bolt; 7. vertical plate; 8. spring; 9. connecting rod; 10. push rod; 11. U-shaped iron core; 12. sheath; 13. primary coil; 14. secondary coil; 15. sealing material; 16. screw; 17. second rectangular block; 18. nut; 19. gasket. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides a technical solution: a resin-encapsulated high-voltage isolation transformer, comprising a transformer housing 1 and a cover body 2, the upper surface of the transformer housing 1 is fitted with the cover body 2, a pair of cross bars 3 are fixedly connected to the inner walls on both sides of the left and right sides of the transformer housing 1, and a stopper 4 is fixedly connected to the other end of the cross bar 3, a pair of first rectangular blocks 5 are fixedly connected to the lower left and right sides of the transformer housing 1, and the internal threads of the first rectangular blocks 5 are connected with bolts 6, a vertical plate 7 is installed on the outer wall adjacent to the cross bar 3, and the inner wall of the through hole of the vertical plate 7 is gap-matched with the outer wall of the cross bar 3, a tightening mechanism is installed on the outer wall of the vertical plate 7, and a connecting mechanism is installed below the cover body 2;

[0022] A cover 2 can be set above the transformer housing 1. Both the transformer housing 1 and the cover 2 are made of PVC insulating material. Four through holes are processed inside the vertical plate 7, and cross bars 3 are set at the through holes, so that the cross bars 3 can limit the vertical plate 7.

[0023] The present embodiment is further configured such that the tightening mechanism includes a spring 8 fixed to the vertical plate 7 and the inner wall of the transformer housing 1, a pair of connecting rods 9 are fixed to the upper and lower inner sides of the vertical plate 7, a push rod 10 is fixed to the outer wall of the adjacent connecting rods 9, a pair of U-shaped iron cores 11 are installed on the inner sides of the left and right push rods 10, the left and right U-shaped iron cores 11 are bonded and connected, the outer wall of the U-shaped iron core 11 is sleeved with a sheath 12, and the outer wall of the sheath 12 is in contact with the push rod 10;

[0024] A sheath 12 may be sleeved on the outer wall of the U-shaped core 11 . The sheath 12 is made of insulating rubber material and can serve the purpose of insulation.

[0025] This embodiment is further configured such that the upper outer wall of the U-shaped iron core 11 is wound with a primary coil 13, and the upper outer wall of the primary coil 13 is gap-matched with the inner wall of the through hole of the cover body 2;

[0026] Two through holes may be processed on the cover 2 to facilitate the primary coil 13 to pass through.

[0027] This embodiment is further configured such that the lower outer wall of the U-shaped iron core 11 is wound with a secondary coil 14, and the front outer wall of the secondary coil 14 is fixedly connected to the inside of the transformer housing 1;

[0028] Two openings can be processed at the front end of the transformer housing 1, and after the secondary coil 14 passes through, the openings can be blocked by sealant or the like.

[0029] This embodiment is further configured such that the interior of the transformer housing 1 is filled with a sealing material 15;

[0030] The sealing material 15 is made of epoxy resin, which can be used for overall gluing and curing. The epoxy resin has a temperature resistance level of more than 155°C, high viscosity, and moderate hardness. It can be used in a self-drying type or a heat-curing type. The cured epoxy resin is an excellent insulating material with high dielectric properties, resistance to surface leakage, and resistance to arcing. In this way, the device can form a resin-encapsulated insulated high-voltage isolation transformer.

[0031] The present embodiment is further configured such that the connection mechanism includes two pairs of screws 16 fixedly connected to the outer walls on the left and right sides of the lower surface of the cover body 2, the outer walls of the screws 16 are installed with second rectangular blocks 17 fixed to the transformer housing 1, and the outer walls of the second rectangular blocks 17 are gap-matched with the outer walls of the screws 16, the lower outer walls of the screws 16 are threadedly connected with nuts 18, a gasket 19 is attached between the nut 18 and the second rectangular block 17, and the inner wall of the gasket 19 is gap-matched with the outer wall of the screw 16;

[0032] A through hole can be processed inside the second rectangular block 17, so that when the cover plate 2 drives the screw rod 16 to penetrate into the through hole of the second rectangular block 17, the gasket 19 and the nut 18 are installed on the screw rod 16 in sequence to fix the cover plate 2.

[0033] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the field. The following mainly introduces the working principle and process.

[0034] Embodiment: When the device is needed, the two U-shaped cores 11 can be bonded together, and then the primary coil 13 and the secondary coil 14 can be wound onto the sheath 12 of the U-shaped core 11. Then, the push rod 10 can be pressed outward, so that the push rod 10 drives the vertical plate 7 to move on the horizontal bar 3 through the connecting rod 9. The vertical plate 7 can cooperate with the transformer housing 1 to squeeze the spring 8, so that the spring 8 undergoes elastic deformation. Then, the U-shaped core 11 is moved into the transformer housing 1, and the push rod 10 is loosened, so that the push rod 10 is reset under the elastic force of the spring 8, so that the U-shaped core 11 is pressed and fixed, and then the secondary coil 14 is pressed outward. The coil 14 passes through the front end of the transformer housing 1 and is fixed by sealant, etc., and a sealing material 15 is poured into the transformer housing 1 to perform overall gluing and curing. When the sealing material 15 is cured, the screw 16 is driven through the cover plate 2 to penetrate into the through hole of the second rectangular block 17, and the primary coil 13 passes through the through hole of the cover plate 2, and then the gasket 19 and the nut 18 are installed on the screw 16 in sequence, and the cover plate 2 is fixed. In this way, the overall installation is completed, so that the operator does not need to pull the U-shaped core 11 through the primary coil 13 all the time, which reduces the labor level and improves the subsequent curing effect.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A resin-encapsulated high-voltage isolation transformer, comprising a transformer housing (1) and a cover (2), wherein the cover (2) is attached to the upper surface of the transformer housing (1), characterized in that: A pair of cross bars (3) are fixedly connected to the inner walls on the left and right sides of the transformer housing (1), and a stopper (4) is fixedly connected to the other end of the cross bar (3). A pair of first rectangular blocks (5) are fixedly connected to the lower part of the left and right sides of the transformer housing (1), and the internal threads of the first rectangular blocks (5) are connected to bolts (6). A vertical plate (7) is installed on the outer wall of the adjacent cross bar (3), and the inner wall of the through hole of the vertical plate (7) is gap-matched with the outer wall of the cross bar (3). A tightening mechanism is installed on the outer wall of the vertical plate (7), and a connecting mechanism is installed below the cover body (2).

2. The resin-encapsulated high-voltage isolation transformer according to claim 1, characterized in that: The clamping mechanism comprises a spring (8) fixedly connected to the vertical plate (7) and the inner wall of the transformer housing (1); a pair of connecting rods (9) are fixedly connected to the upper and lower inner sides of the vertical plate (7); a push rod (10) is fixedly connected to the outer walls of the adjacent connecting rods (9); a pair of U-shaped iron cores (11) are installed on the inner sides of the left and right push rods (10); the left and right U-shaped iron cores (11) are bonded and connected to each other; a sheath (12) is sleeved on the outer wall of the U-shaped iron core (11), and the outer wall of the sheath (12) is in contact with the push rod (10).

3. The resin-encapsulated high-voltage isolation transformer according to claim 2, characterized in that: The upper outer wall of the U-shaped iron core (11) is wound with a primary coil (13), and the upper outer wall of the primary coil (13) is gap-matched with the inner wall of the through hole of the cover body (2).

4. The resin-encapsulated high-voltage isolation transformer according to claim 2, characterized in that: A secondary coil (14) is wound and connected to the lower outer wall of the U-shaped iron core (11), and the front outer wall of the secondary coil (14) is fixedly connected to the inside of the transformer housing (1).

5. The resin-encapsulated high-voltage isolation transformer according to claim 1, characterized in that: The interior of the transformer housing (1) is filled with sealing material (15).

6. The resin-encapsulated high-voltage isolation transformer according to claim 1, characterized in that: The connection mechanism comprises two pairs of screws (16) fixedly connected to the left and right outer walls of the lower surface of the cover body (2); the outer walls of the screws (16) are provided with second rectangular blocks (17) fixedly connected to the transformer housing (1), and the outer walls of the second rectangular blocks (17) are clearance-matched with the outer walls of the screws (16); the lower outer walls of the screws (16) are threadedly connected with nuts (18); a gasket (19) is fitted between the nut (18) and the second rectangular blocks (17), and the inner walls of the gaskets (19) are clearance-matched with the outer walls of the screws (16).

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