Combined iron core of dry-type transformer

Abstract

The utility model relates to the technical field of transformer iron cores, in particular to a combined iron core of a dry type transformer, which comprises a silicon steel strip iron core, two iron core clamping pieces are arranged on the outer side of the silicon steel strip iron core, and an installation screw rod is arranged between the two iron core clamping pieces. The two ends of the mounting screw respectively penetrate through the two iron core clamping pieces and extend to the exteriors of the iron core clamping pieces, and a first locking nut and a second locking nut are in threaded connection with the sides, far away from each other, of the two iron core clamping pieces on the mounting screw. The anti-loosening capacity of the first locking nut and the second locking nut is improved, then connecting screw holes, opposite in thread direction, of a pressing screw and a mounting screw are in threaded connection, so that a pressing piece extrudes and tightens a rubber sleeve, the tightening capacity of the tightening rubber sleeve is improved, a positioning pressing ring is clamped into an annular pressing groove, the second locking nut is pressed, and the anti-loosening capacity of the first locking nut and the second locking nut is improved. And the positioning capability of the first locking nut and the second locking nut is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer cores, in particular to a combined core of a dry-type transformer. Background Art

[0002] The iron core is the main magnetic circuit part of the transformer, usually made of hot-rolled or cold-rolled silicon steel sheets with a high silicon content and coated with insulating paint on the surface.

[0003] In the prior art, a dry-type transformer core, such as that proposed in patent application number "CN202022085457.0", includes a silicon steel sheet core, a core tie and a clamp insulation, a core clamp is provided on the outside of the silicon steel sheet core, and a base is provided at the bottom of the core clamp, and a tightening screw is provided on the side of the base.

[0004] However, in the prior art, such as the transformer core proposed in patent application number "CN202022085457.0", the outer side of the silicon steel sheet core has two core clamps, and the core clamps are assembled together by passing the two ends of the screw through the core clamps and threadedly connecting the locking nuts. This assembly method lacks positioning of the locking nuts, and the locking nuts are prone to loosening. Utility Model Content

[0005] The utility model aims to provide a combined iron core of a dry-type transformer to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A combined iron core of a dry-type transformer comprises a silicon steel strip iron core, two iron core clamps are arranged on the outer side of the silicon steel strip iron core, a mounting screw is arranged between the two iron core clamps, two ends of the mounting screw respectively penetrate the two iron core clamps and extend to the outside of the iron core clamps, a first locking nut and a second locking nut are threadedly connected on the mounting screw and located on a side of the two iron core clamps away from each other, the second locking nut is located on a side of the first locking nut away from the iron core clamp, an anti-skid washer is sleeved on the mounting screw, and the anti-skid washer is arranged on one side of the first locking nut and the iron core clamp.

[0008] Both ends of the mounting screw are fixedly connected with arc-shaped end heads, the arc-shaped end heads are provided with connecting screw holes, the connecting screw holes are threadedly connected with a clamping mechanism, and the thread direction of the connecting screw holes is opposite to that of the mounting screw.

[0009] Preferably, an anti-impact washer is fixedly connected to a side of the first locking nut away from the anti-slip washer, and the anti-impact washer is sleeved on the outer surface of the mounting screw.

[0010] Preferably, the second locking nut is fixedly connected to the tightening rubber sleeve at one side away from the first locking nut, and one end of the mounting screw penetrates the tightening rubber sleeve and extends to the outside of the tightening rubber sleeve.

[0011] Preferably, the clamping mechanism comprises a clamping screw, which is threadedly connected to a connecting screw hole, a control sleeve is fixedly connected to the top of the clamping screw, and an anti-slip groove is provided on the outer side of the control sleeve.

[0012] Preferably, the bottom of the control sleeve is fixedly connected to a connecting shaft, the bottom of the connecting shaft is fixedly connected to a pressing piece, and the pressing piece is matched with the tightening rubber sleeve.

[0013] Preferably, a positioning pressure ring is fixedly connected to the bottom of the pressing member, and an annular pressure groove is formed on a side of the second locking nut away from the first locking nut, and the annular pressure groove and the positioning pressure ring are matched.

[0014] Beneficial effects of the utility model:

[0015] The utility model discloses to be provided with anti-skid gasket and tightening rubber sleeve, improves the anti-loosening ability of the first locking nut and the second locking nut, then by threadingly connecting the connecting screw holes with opposite thread directions of the tightening screw and the installation screw, so that the pressure piece squeezes the tightening rubber sleeve, improves the tightening ability of the tightening rubber sleeve, and the positioning pressure ring is clamped into the annular pressure groove to tighten the second locking nut, greatly improving the positioning ability of the first locking nut and the second locking nut, and avoiding the locking nut from loosening when the core clamp is fixed by the installation screw and the locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This utility model Figure 1 Schematic diagram of the structure of the screw rod installed in the middle;

[0019] Figure 3 This utility model Figure 2 A schematic diagram of the structure of one end of the screw rod;

[0020] Figure 4 This utility model Figure 2 Schematic diagram of the structure of the middle compression screw.

[0021] The reference numerals in the figures are as follows:

[0022] 1. Silicon steel strip core, 2. Core clamp, 3. Mounting screw, 301, anti-slip washer, 4. First locking nut, 5. Second locking nut, 6. Arc end, 7. Connecting screw hole, 8. Anti-impact washer, 9. Tightening rubber sleeve, 10. Compression screw, 11. Control sleeve, 12. Connecting shaft, 13. Pressure piece, 14. Positioning pressure ring, 15. Annular pressure groove. DETAILED DESCRIPTION

[0023] 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 of 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.

[0024] A combined iron core of a dry-type transformer comprises a silicon steel strip iron core 1, two iron core clamps 2 are arranged on the outer side of the silicon steel strip iron core 1, a mounting screw 3 is arranged between the two iron core clamps 2, both ends of the mounting screw 3 respectively penetrate the two iron core clamps 2 and extend to the outside of the iron core clamps 2, a first locking nut 4 and a second locking nut 5 are threadedly connected on the mounting screw 3 and located on the side where the two iron core clamps 2 are away from each other, the second locking nut 5 is located on the side of the first locking nut 4 away from the iron core clamp 2, an anti-skid washer 301 is sleeved on the mounting screw 3, and the anti-skid washer 301 is arranged on one side of the first locking nut 4 and the iron core clamp 2.

[0025] Both ends of the mounting screw rod 3 are fixedly connected with arc-shaped end heads 6 , which are provided with connecting screw holes 7 , which are threadedly connected with a clamping mechanism, and the thread direction of the connecting screw hole 7 is opposite to that of the mounting screw rod 3 .

[0026] like Figure 1 and Figure 2 The silicon steel strip core 1 and the core clamp 2 on its outer side are both prior art. The silicon steel strip core 1 can be positioned by installing the screw 3 in combination with the nut. A pull plate outer insulation, a pull plate insulation and a clamp insulation are provided between the silicon steel strip core 1 and the core clamp 2, which will not be described in detail here.

[0027] The core clamp 2 has an opening so that the mounting screw 3 can pass through the core clamp 2. The anti-slip washer 301 is also provided with an opening to facilitate the mounting screw 3 to pass through. The first locking nut 4 and the second locking nut 5 have the same specifications.

[0028] An anti-impact washer 8 is fixedly connected to a side of the first locking nut 4 away from the anti-slip washer 301 , and the anti-impact washer 8 is sleeved on the outer surface of the mounting screw 3 .

[0029] By arranging the impact-resistant washer 8 between the first locking nut 4 and the second locking nut 5 , it is avoided that the first locking nut 4 and the second locking nut 5 are in rigid contact with each other.

[0030] The second locking nut 5 is fixedly connected to the tightening rubber sleeve 9 at one side away from the first locking nut 4 , and one end of the mounting screw 3 penetrates through the tightening rubber sleeve 9 and extends to the outside of the tightening rubber sleeve 9 .

[0031] like Figure 2 and Figure 3 The tightening rubber sleeve 9 is a platform, and the arc-shaped end 6 at the top of the mounting screw 3 makes it easier for the mounting screw 3 to pass through the tightening rubber sleeve 9. The tightening rubber sleeve 9 is elastically tightened on the mounting screw 3 to improve the positioning ability of the second locking nut 5.

[0032] The clamping mechanism comprises a clamping screw 10, which is threadedly connected to the connecting screw hole 7, and a control sleeve 11 is fixedly connected to the top of the clamping screw 10, and an anti-slip groove is arranged on the outer side of the control sleeve 11.

[0033] like Figure 2 and Figure 4 The anti-skid grooves on the outer side of the control sleeve 11 facilitate manual rotation of the control sleeve 11 and drive the pressing screw 10 to rotate.

[0034] The bottom of the control sleeve 11 is fixedly connected with a connecting shaft 12 , and the bottom of the connecting shaft 12 is fixedly connected with a pressing piece 13 , which is matched with the tightening rubber sleeve 9 .

[0035] like Figure 2 , Figure 3 and Figure 4 When the compression screw 10 is threadedly connected to the connecting screw hole 7 , the pressure piece 13 can be attached to and squeezed against the outside of the tightening rubber sleeve 9 , thereby improving the tightening ability of the tightening rubber sleeve 9 .

[0036] A positioning pressing ring 14 is fixedly connected to the bottom of the pressing member 13 , and an annular pressing groove 15 is formed on a side of the second locking nut 5 away from the first locking nut 4 , and the annular pressing groove 15 is matched with the positioning pressing ring 14 .

[0037] like Figure 2 , Figure 3 and Figure 4 When the pressing screw 10 is threadedly connected to the connecting screw hole 7 , the positioning pressing ring 14 can be inserted into the annular pressing groove 15 .

[0038] The working principle of the combined iron core of a dry-type transformer provided by the utility model is as follows:

[0039] In the process of assembling the core, when the core clamps 2 on both sides of the silicon steel strip core 1 need to be connected together, firstly, the two ends of the mounting screw 3 are passed through the core clamps 2, and then the anti-slip washer 301 is put on the mounting screw 3, and then the first locking nut 4 is threadedly connected, and then the impact-resistant washer is put on, and the second locking nut is threadedly connected to lock the core clamp 2, and the core clamps 2 on both sides position the silicon steel strip core 1;

[0040] Then, the clamping screw 10 is threadedly connected to the connecting screw hole 7, so that the pressure piece 13 presses the tightening rubber sleeve 9, the positioning pressure ring 14 is inserted into the annular pressure groove 15, and the second locking nut 5 is pressed, which greatly improves the positioning ability of the second locking nut 5. The second locking nut 5 presses the first locking nut 4 to prevent the first locking nut 4 and the second locking nut 5 from loosening.

[0041] Compared with the related art, the combined iron core of a dry-type transformer provided by the utility model has the following beneficial effects:

[0042] The utility model improves the anti-loosening ability of the first locking nut 4 and the second locking nut 5 by arranging an anti-slip washer 301 and a tightening rubber sleeve 9, and then threadably connects the connecting screw hole 7 with opposite thread directions of the clamping screw 10 and the mounting screw 3, so that the pressure piece 13 squeezes the tightening rubber sleeve 9, thereby improving the tightening ability of the tightening rubber sleeve 9, and the positioning pressure ring 14 is inserted into the annular pressure groove 15 to tighten the second locking nut 5, thereby greatly improving the positioning ability of the first locking nut 4 and the second locking nut 5, and preventing the locking nut from loosening when the core clamp 2 is fixed by the mounting screw 3 in cooperation with the locking nut.

[0043] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A combined iron core of a dry-type transformer, comprising a silicon steel strip iron core (1), wherein two iron core clamps (2) are arranged on the outer side of the silicon steel strip iron core (1), characterized in that: A mounting screw (3) is arranged between the two core clamps (2), and two ends of the mounting screw (3) respectively penetrate the two core clamps (2) and extend to the outside of the core clamps (2); a first locking nut (4) and a second locking nut (5) are threadedly connected on the mounting screw (3) and located on a side of the two core clamps (2) away from each other, and the second locking nut (5) is located on a side of the first locking nut (4) away from the core clamps (2); an anti-skid washer (301) is sleeved on the mounting screw (3), and the anti-skid washer (301) is arranged on one side of the first locking nut (4) and the core clamp (2); Both ends of the mounting screw rod (3) are fixedly connected with arc-shaped end heads (6), the arc-shaped end heads (6) are provided with connecting screw holes (7), the connecting screw holes (7) are threadedly connected with a clamping mechanism, and the thread direction of the connecting screw holes (7) is opposite to the thread direction of the mounting screw rod (3).

2. The combined iron core of a dry-type transformer according to claim 1, characterized in that: An anti-impact washer (8) is fixedly connected to the side of the first locking nut (4) away from the anti-slip washer (301), and the anti-impact washer (8) is sleeved on the outer surface of the mounting screw (3).

3. The combined iron core of a dry-type transformer according to claim 2, characterized in that: The second locking nut (5) is fixedly connected to the tightening rubber sleeve (9) at a side away from the first locking nut (4), and one end of the mounting screw (3) passes through the tightening rubber sleeve (9) and extends to the outside of the tightening rubber sleeve (9).

4. The combined iron core of a dry-type transformer according to claim 3, characterized in that: The clamping mechanism comprises a clamping screw (10), the clamping screw (10) is threadedly connected to the connecting screw hole (7), the top of the clamping screw (10) is fixedly connected to a control sleeve (11), and the outer side of the control sleeve (11) is provided with anti-slip grooves.

5. The combined iron core of a dry-type transformer according to claim 4, characterized in that: The bottom of the control shaft sleeve (11) is fixedly connected to a connecting shaft (12), and the bottom of the connecting shaft (12) is fixedly connected to a pressing piece (13), and the pressing piece (13) is matched with the tightening rubber sleeve (9).

6. The combined iron core of a dry-type transformer according to claim 5, characterized in that: The bottom of the pressing member (13) is fixedly connected with a positioning pressing ring (14), and a ring-shaped pressing groove (15) is provided on the side of the second locking nut (5) away from the first locking nut (4), and the ring-shaped pressing groove (15) and the positioning pressing ring (14) are matched.

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