Dry-type transformer

Abstract

According to the technical scheme, the dry-type transformer is characterized by comprising a first protection assembly and a second protection assembly, the first protection assembly comprises a head sleeve capable of being arranged outside the threaded column in a sleeving mode, a tail sleeve, a plurality of middle sleeves located between the head sleeve and the tail sleeve, a head connecting piece coaxially located at one end of the head sleeve, and a tail connecting piece coaxially located at one end of the tail sleeve. The head sleeve, the multiple middle sleeves and the tail sleeve are sequentially arranged together in a sleeved mode and can only be disassembled in a one-way mode, the head connecting piece and the tail connecting piece are fixedly connected with the base and the adjusting frame respectively, and the second protection assembly comprises a second corrugated pipe arranged outside the threaded column in a sleeving mode and a rotating ring located at one end of the second corrugated pipe. The rotating ring is limited in the adjusting frame and can rotate relative to the adjusting frame, the other end of the second corrugated pipe is fixedly connected with a nut at the end of the threaded column, and the problems that in the prior art, the threaded column is prone to rusting, consequently, the height is difficult to adjust, and assemblies are numerous and difficult to carry are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field more specifically relates to a dry -type transformer. BACKGROUND

[0002] Dry -type transformer is a kind of transformer without using insulating oil, its iron core and winding are not immersed in insulating oil, mainly through natural air cooling (AN) or forced air cooling (AF) mode cooling, this kind of transformer is widely used in local lighting, high-rise building, airport, wharf and CNC machinery equipment etc.

[0003] At present, the Chinese patent with announcement number CN222260717U discloses an outdoor dry-type transformer, which is characterized in that a telescopic frame, an adjusting frame, a threaded column and an axle seat are additionally arranged between the dry-type transformer body and the base, so that the threaded column rotates relative to the adjusting frame and the axle seat to drive the dry-type transformer body to move up and down relative to the base, and the length of the telescopic frame changes accordingly with the height of the dry-type transformer. At the same time, by arranging limiting columns and limiting frames on the base plate, the height adjustment of the base has a specified lower limit and upper limit. Although this design solves the problem that different installation environments have different height requirements for the dry-type transformer, it still has defects. Firstly, the threaded column is exposed to the outside, which can accelerate the rusting speed of the threads on the surface of the threaded column in a humid environment, which can cause the threaded column to rotate relative to the adjusting frame, affecting the height adjustment of the dry-type transformer. Secondly, the number of limiting columns and limiting frames is large, and the installation station is more, which increases the complexity of the process and increases the production cost of the producer. The overall structure of the transformer is complex and heavy, which increases the difficulty of carrying and increases the transportation cost. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a dry-type transformer with simple structure and stable threaded column structure.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a dry -type transformer, including transformer body, the base that is positioned transformer body bottom end, the bottom plate that is located the just below of base, the adjusting frame that is positioned on the bottom plate, the threaded column that is connected on the adjusting frame and a plurality of adjacent bottom plate corner place and between base and bottom plate telescopic frame, one end of threaded column is rotatably connected with base, still include having first protection assembly that is located adjusting frame top and second protection assembly that is located adjusting frame inner chamber, first protection assembly includes can the first sleeve of threaded column outside, tail sleeve, a plurality of middle sleeve between first sleeve and tail sleeve, a first connecting piece that is coaxially positioned at first sleeve one end and a tail connecting piece that is coaxially positioned at tail sleeve one end, first sleeve, a plurality of middle sleeve and tail sleeve are successively set together and can only one -way split, first connecting piece and tail connecting piece are fixedly connected with base and adjusting frame respectively, second protection assembly includes a second bellow that sets outside threaded column and a rotating ring that is positioned at second bellow one end, rotating ring is limited in adjusting frame and can rotate relative to adjusting frame, the other end of second bellow is fixedly connected with the nut at threaded column end part, make the length of second bellow and the total length of first sleeve, a plurality of middle sleeve and tail sleeve change accordingly through relative adjusting frame screw threaded column.

[0006] As a further improvement of the utility model, the outer diameter of the first sleeve, the plurality of middle sleeves and the tail sleeve increases in turn.

[0007] As a further improvement of the utility model, the tail sleeve is internally provided with a height limiting washer positioned between the tail sleeve and the adjacent middle sleeve.

[0008] As a further improvement of the utility model, the tail sleeve is internally provided with a height limiting washer positioned between the tail sleeve and the adjacent middle sleeve.

[0009] As a further improvement of the utility model, the adjusting frame comprises a threaded plate positioned between the first sleeve and the second bellow and two support plates respectively positioned at both ends of the threaded plate and connected with the bottom plate, the width of the two support plates is less than the width of the threaded plate.

[0010] The utility model has the advantages that the length of the second bellow and the total length of the first sleeve, the plurality of middle sleeves and the tail sleeve change accordingly through relative rotation of the threaded column and the adjusting frame, which not only ensures that the threaded column is separated from the outside world and effectively avoids the influence of external water vapor and other substances on the threaded column, but also stabilizes the threaded column structure, thereby facilitating the rotation of the threaded column relative to the adjusting frame, improving the adjustment efficiency of the height of the transformer body and stabilizing the adjustment efficiency, and eliminating the need for a limiting column and a limiting frame, effectively simplifying the overall structure and reducing the overall weight, thereby facilitating transportation and reducing transportation costs. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a perspective view of the utility model;

[0012] Figure 2 is a perspective view of the utility model after the transformer body is removed;

[0013] Figure 3 is an assembly view of the threaded column, the adjusting frame, the first protection assembly and the second protection assembly in the utility model;

[0014] Figure 4 is an exploded view of Figure 3 ;

[0015] Figure 5 is a main sectional view of Figure 3 .

[0016] Reference signs: 1, transformer body; 2, base; 3, bottom plate; 4, adjusting frame; 41, threaded plate; 42, support plate; 5, threaded column; 6, telescopic frame; 7, first protection assembly; 71, head sleeve; 72, tail sleeve; 73, middle sleeve; 74, head connecting piece; 75, tail connecting piece; 76, height limiting washer; 77, low limiting washer; 8, second protection assembly; 81, second bellows; 82, rotating ring. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail in combination with the drawings and examples. Same parts are indicated by same reference signs.

[0018] Referring to Figures 1 to 5 , a dry-type transformer of the embodiment includes a transformer body 1, a base 2 positioned at the bottom end of the transformer body 1, a bottom plate 3 located directly below the base 2, an adjusting frame 4 positioned on the bottom plate 3, a threaded column 5 threadedly connected to the adjusting frame 4, and a plurality of telescopic frames 6 adjacent to the corners of the bottom plate 3 and located between the base 2 and the bottom plate 3, one end of the threaded column 5 is rotationally connected to the base 2.

[0019] Based on the foregoing prior art, further comprising a first protection assembly 7 and a second protection assembly 8, the first protection assembly 7 comprises a first sleeve 71, a tail sleeve 72, a plurality of middle sleeves 73, a first connecting piece 74 and a tail connecting piece 75, the first sleeve 71, the plurality of middle sleeves 73 and the tail sleeve 72 are all cylindrical, the two ends of the plurality of middle sleeves 73 are integrally formed with an inner ring body on the inner wall of the cylinder body and an outer ring body on the outer wall of the cylinder body, the outer wall of one end of the first sleeve 71 is integrally formed with an outer ring body and the other end of the outer wall is machined with external threads, the inner wall of one end of the tail sleeve 72 is integrally formed with an inner ring body and the other end of the outer wall is machined with external threads, the outer diameter and the inner diameter of the first sleeve 71, the plurality of middle sleeves 73 and the tail sleeve 72 are gradually increased, the maximum height between the base 2 and the bottom plate 3 determines the number of middle sleeves 73, here the number of middle sleeves 73 is one, the inner diameter of the first sleeve 71 is matched with the diameter of the threaded column 5, the outer diameter of the first sleeve 71 is matched with the inner diameter of the inner ring body of the middle sleeve 73, the diameter of the outer ring body of the first sleeve 71 is matched with the inner diameter of the middle sleeve 73, the outer diameter of the middle sleeve 73 is matched with the inner diameter of the inner ring body of the tail sleeve 72, the diameter of the outer ring body of the middle sleeve 73 is matched with the inner diameter of the inner ring body of the tail sleeve 72, the first connecting piece 74 and the tail connecting piece 75 are hollow in the middle and the inner wall is machined with internal threads, the two sides of the first connecting piece 74 and the tail connecting piece 75 are machined with lugs and the lugs are provided with through holes, the base 2 and the adjusting frame 4 are machined with threaded holes corresponding to the through holes, the second protection assembly 8 comprises a second bellows 81 and a rotating ring 82, the inner diameter of the second bellows 81 and the inner diameter of the rotating ring 82 are both greater than the diameter of the threaded column 5, one end of the second bellows 81 is coaxially welded on the rotating ring 82, a ring groove is machined on the adjusting frame 4 for accommodating the rotating ring 82 and for the threaded column 5 to penetrate through, the ring groove is countersunk and the large end is in communication with the inner cavity of the adjusting frame 4;

[0020] In the assembly process, a ring-shaped limiting cover is set outside the second bellow 81, and the end of the threaded column 5 without a nut is threaded through the second bellow 81 and the rotating ring 82 in sequence, then the end of the second bellow 81 is coaxially welded on the nut of the threaded column 5, then the threaded column 5 is rotated through the adjusting frame 4 so that the rotating ring 82 can be fitted into the small end of the ring groove, and the ring-shaped limiting cover is fixed in the large end of the ring groove by means of a bolt, then the rotating ring 82 is limited in the adjusting frame 4, then the middle sleeve 73 is coaxially placed in the tail sleeve 72, and the head sleeve 71 is coaxially placed in the middle sleeve 73, the head connecting piece 74 is screwed on the end of the head sleeve 71 outside the middle sleeve 73, the tail connecting piece 75 is screwed on the end of the tail sleeve 72, then the sleeved tail sleeve 72 is sleeved on the threaded column 5, the threaded column 5 penetrates through the head sleeve 71, the position of the tail connecting piece 75 on the adjusting frame 4 is calibrated and fixed by means of a bolt, finally the assembled adjusting frame 4 is mounted on the bottom plate 3, and the threaded column 5 is rotated to extend into the base 2 and complete the rotating connection, the head connecting piece 74 is lifted and fixed under the base 2 by means of a bolt, and no sealing treatment is made between the sleeves, between the tail connecting piece 75 and the adjusting frame 4, between the head connecting piece 74 and the base 2, and between the rotating ring 82 and the adjusting frame 4, so as to facilitate the flow of gas in the head sleeve 71 and the sleeves to the outside;

[0021] When the nut of the threaded column 5 is rotated by an external force, the second bellow 81 and the rotating ring 82 rotate with the threaded column 5, the length of the second bellow 81 changes, the base 2 moves relative to the bottom plate 3 in the vertical direction, the head connecting piece 74 connected with the base 2 moves with the base 2, in the process of gradually increasing the total length of the head sleeve 71, the middle sleeve 73 and the tail sleeve 72, the head sleeve 71 first moves upward relative to the middle sleeve 73 until the outer ring body of the head sleeve 71 in the middle sleeve 73 abuts against the inner ring body of the middle sleeve 73, then the middle sleeve 73 moves upward relative to the tail sleeve 72 until the outer ring body of the middle sleeve 73 in the tail sleeve 72 abuts against the inner ring body of the tail sleeve 72, the total length of the head sleeve 71, the middle sleeve 73 and the tail sleeve 72 reaches the maximum, and the threaded column 5 cannot continue to rotate;

[0022] Compared with the prior art, the design can ensure that the threaded column 5 is isolated from the outside, effectively avoid the influence of water vapor and other substances in the outside on the threaded column 5, and stabilize the structure of the threaded column 5, thereby facilitating the rotation of the threaded column 5 relative to the adjusting frame 4, improving the adjustment efficiency of the height of the transformer body 1, and stably, and eliminating the need for a limiting column and a limiting frame, thereby effectively simplifying the overall structure, reducing the overall weight, facilitating transportation, and reducing transportation costs.

[0023] As an improved embodiment, referring to Figure 4 and Figure 5 , an upper-limit washer 76 with an outer diameter smaller than the inner diameter of the tail sleeve 72 is arranged outside the middle sleeve 73. When the outer ring body of the middle sleeve 73 and the inner ring body of the tail sleeve 72 jointly clamp the upper-limit washer 76, the total length of the first sleeve 71, the middle sleeve 73, and the tail sleeve 72 reaches the maximum. This design can reduce the total maximum length of the sleeves by changing the thickness and number of the upper-limit washer 76 without replacing the sleeves, thereby facilitating the local adjustment and assembly of the first protection assembly 7.

[0024] As an improved embodiment, referring to Figure 4 and Figure 5 , after the first sleeve 71, the middle sleeve 73, and the tail sleeve 72 are assembled together, the outer diameter of the lower-limit washer 77 is matched with the inner diameter of the tail sleeve 72. The lower-limit washer 77 is arranged outside the threaded column 5 and placed on the adjusting frame 4. Then, the tail sleeve 72 is arranged outside the threaded column 5 and connected to the outside of the lower-limit washer 77. When the end of the middle sleeve 73 and the first sleeve 71 are both in contact with the lower-limit washer 77, the total length of the first sleeve 71, the middle sleeve 73, and the tail sleeve 72 reaches the minimum. This design can increase the total minimum length of the sleeves by changing the thickness and number of the lower-limit washer 77 without replacing the sleeves, thereby facilitating the local adjustment and assembly of the first protection assembly 7.

[0025] As an improved embodiment, because the connecting piece 72 and the rotating ring 82 need to be installed on the adjusting frame 4, the size of the adjusting frame 4 needs to be correspondingly increased. This will cause the angle range of the wrench driving the rotation of the threaded column 5 to be reduced, thereby increasing the number of times of disassembly and assembly of the wrench relative to the threaded column 5 and reducing the height adjustment efficiency. To solve the above problem, referring to Figures 3 to 5As shown, the adjusting frame 4 includes a threaded plate 41 located between the first sleeve 71 and the second bellows 81, and two support plates 42 located at both ends of the threaded plate 41 and connected to the base plate 3. Without affecting the structural strength required for the overall adjusting frame 4, the two sides of the two support plates 42 are cut off so that the width of the two support plates 42 is smaller than the width of the threaded plate 41. This design can increase the angle at which the wrench drives the threaded column 5 to rotate, thereby reducing the number of times the wrench is disassembled and assembled relative to the threaded column 5, and effectively improving the height adjustment efficiency of the transformer body 1.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A dry-type transformer, comprising a transformer body (1), a base (2) positioned at the bottom end of the transformer body (1), a base plate (3) located directly below the base (2), an adjusting frame (4) positioned on the base plate (3), a threaded post (5) threadedly connected to the adjusting frame (4), and a plurality of telescopic frames (6) located near the corners of the base plate (3) and between the base (2) and the base plate (3), wherein one end of the threaded post (5) is rotatably connected to the base (2), characterized in that: It also includes a first protective assembly (7) located above the adjusting frame (4) and a second protective assembly (8) located inside the adjusting frame (4). The first protective assembly (7) includes a first sleeve (71) that can be fitted onto the threaded post (5), a tail sleeve (72), several middle sleeves (73) located between the first sleeve (71) and the tail sleeve (72), a first connector (74) coaxially positioned at one end of the first sleeve (71), and a tail connector (75) coaxially positioned at one end of the tail sleeve (72). The first sleeve (71), several middle sleeves (73), and tail sleeve (72) are sequentially fitted together and can only be separated in one direction. The first connector (74) The tail connector (75) is fixedly connected to the base (2) and the adjusting frame (4) respectively. The second protective component (8) includes a second bellows (81) sleeved outside the threaded column (5) and a rotating ring (82) positioned at one end of the second bellows (81). The rotating ring (82) is confined within the adjusting frame (4) and can rotate relative to the adjusting frame (4). The other end of the second bellows (81) is fixedly connected to the nut at the end of the threaded column (5). By rotating the threaded column (5) relative to the adjusting frame (4), the length of the second bellows (81) and the total length of the first sleeve (71), several middle sleeves (73) and the tail sleeve (72) change accordingly.

2. A dry-type transformer according to claim 1, characterized in that: The outer diameters of the first sleeve (71), several middle sleeves (73) and the tail sleeve (72) increase sequentially.

3. A dry-type transformer according to claim 2, characterized in that: The tail sleeve (72) is provided with a height limiting washer (76) located between the tail sleeve (72) and the adjacent middle sleeve (73).

4. A dry-type transformer according to claim 2, characterized in that: The tail sleeve (72) is provided with a low-limiting washer (77) located above the adjusting frame (4).

5. A dry-type transformer according to claim 1, 2, 3, or 4, characterized in that: The adjusting frame (4) includes a threaded plate (41) located between the first sleeve (71) and the second corrugated pipe (81) and two support plates (42) located at both ends of the threaded plate (41) and connected to the base plate (3). The width of the two support plates (42) is smaller than the width of the threaded plate (41).

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