A dry type transformer

Abstract

The present invention relates to the technical field of dry-type transformers, and discloses a dry-type transformer, including multiple groups of coil windings, multiple contact posts are alternately arranged on the coil windings, and also includes a gear adjustment unit arranged on each coil winding for connecting any two adjacent staggered contact posts, and an auxiliary adjustment unit is arranged on the gear adjustment unit, and the gear adjustment unit includes an annular clamping groove opened on the wall of the contact post. The dry-type transformer slides on the connecting rod through two sliders, and under the cooperation of the second spring, two limit blocks slide on the wall of the pressing cavity, so that the limit blocks are clamped or separated with the limit groove, and the arc clamp is limited, so that the gear adjustment of the coil winding can be completed, and there is no need to frequently loosen or tighten the bolts to adjust the gear, so that the gear adjustment efficiency is higher, and it is not easy to damage the transformer gear adjustment unit, so that the transformer gear adjustment is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of dry-type transformers, and in particular to a dry-type transformer. Background Art

[0002] A dry-type transformer refers to a transformer whose core and winding are not immersed in insulating oil. With the continuous development of the global economy, dry-type transformers have achieved rapid development throughout the world, especially in distribution transformers. The proportion of dry-type transformers has continued to increase, and they have been widely used in local lighting, high-rise buildings, airports, dock machinery and equipment and other places.

[0003] In the prior art, when the voltage on the low-voltage side of a dry-type transformer is low due to excessive load, the problem can be solved by adjusting the gear of the transformer. The power supply of the transformer is disconnected, and the voltage regulating device of the transformer is found. The two sets of bolts on it are loosened separately, and the connecting piece is placed between two adjacent staggered contact columns. Then, the bolts are tightened in sequence, and the appropriate voltage regulating gear is selected according to actual needs.

[0004] The prior art has the following defects:

[0005] In the process of adjusting the gear position of the transformer, there are multiple groups of coil windings, and each group of coil windings needs to be adjusted. The operator needs to use tools to continuously loosen and tighten the bolts for gear adjustment. Manually loosening and tightening the bolts is not only labor-intensive, but also inefficient. In the process of tightening the bolts, the operator's hands are easily fatigued and sore, and it is difficult to ensure the consistency of the tightening force, which can easily lead to damage to the transformer gear adjustment unit.

[0006] When tightening the bolts, they will undergo elastic deformation. Over time, the bolts may creep due to continuous pressure, eventually leading to plastic deformation, affecting their strength and durability. Moreover, adjusting the gear position by tightening the bolts can easily cause the bolts to fall off and be lost, affecting subsequent gear adjustments. Summary of the invention

[0007] In view of the problem in the prior art that bolts need to be tightened continuously during the transformer gear adjustment process, a dry-type transformer is proposed.

[0008] The present application provides a dry-type transformer, the purpose of which is to: eliminate the need to tighten bolts during transformer gear adjustment, thereby reducing the labor intensity of staff and making transformer gear adjustment more convenient.

[0009] The technical solution of the present invention is: a dry-type transformer, comprising a plurality of coil windings, a plurality of contact posts being alternately arranged on the coil windings, and a gear adjustment unit arranged on each coil winding for connecting any two adjacent staggered contact posts, wherein an auxiliary adjustment unit is arranged on the gear adjustment unit;

[0010] The gear adjustment unit includes an annular clamping groove formed on the wall of the contact column, a pressing cavity is provided in the contact column, a connecting component is provided between any two adjacent contact columns, a clamping component is provided in the pressing cavity, an extrusion component is provided on the clamping component, a pushing component is provided on the extrusion component, and a rotating component is provided on the wall of the contact column near the bottom end;

[0011] The connecting component includes a connecting piece arranged between two contact posts, arc-shaped clamps are slidably connected in both ends of the connecting piece, a limit assembly is commonly connected between the arc-shaped clamp and the connecting piece, one end of the arc-shaped clamp away from the center of the connecting piece extends to the outside of the connecting piece and is clamped with a corresponding clamping groove, and the arc-shaped clamp is conductively and slidably connected to the connecting piece;

[0012] The clamping component includes a connecting rod connected to the inner wall of the pressing cavity near the bottom, two sliders are symmetrically slidably connected to the connecting rod, a second spring is connected between the two sliders, the second spring is sleeved on the connecting rod, and the two sliders are connected to limiting blocks on the back sides. Two limiting grooves are symmetrically provided on the arc caliper, and the end of the limiting block away from the slider is sealed and movable to penetrate the cavity wall of the pressing cavity and extend into the corresponding limiting groove.

[0013] Furthermore, the limit assembly includes U-shaped grooves symmetrically opened at both ends of the connecting plate, two arc calipers are respectively slidably connected to the inner sides of the two U-shaped grooves, a first spring is commonly connected between the arc calipers and the bottom of the corresponding U-shaped grooves, the opposite ends of the two first springs are connected to the connecting plate, and two limit rods are respectively connected to the opposite sides of the two arc calipers, and the multiple limit rods are movably connected to the connecting plate.

[0014] Furthermore, the clamping component also includes a first inclined surface arranged on the limiting block, and the arc-shaped caliper is provided with two symmetrically distributed arc-shaped surfaces, and the first inclined surface is slidably connected to the arc-shaped surfaces.

[0015] Furthermore, the extrusion component includes two first extrusion rods symmetrically hinged on the inner cavity wall of the pressing cavity near the top, the bottom of the first extrusion rod is hinged with the second extrusion rod, the bottom of the second extrusion rod is rotatably connected to the third extrusion rod, the bottom of the third extrusion rod is hinged to the slider, the top of the third extrusion rod is connected to a pin, and a limit frame is connected to the position of the pin on the inner cavity wall of the pressing cavity, and the pin is movably arranged between the inner cavity wall of the pressing cavity and the limit frame.

[0016] Furthermore, the pushing component includes a pushing block movably arranged in the pressing cavity, a pushing rod connected to the top of the pushing block, a handle connected to the top of the cavity that seals and movably passes through the pressing cavity at the upper end of the pushing rod, the other end of the pushing rod is connected to the pushing block, and a third spring is commonly connected between the pushing block and the inner cavity top of the pressing cavity, and the third spring is sleeved on the outside of the pushing rod.

[0017] Furthermore, the rotating component includes a conductive base plate connected to the coil winding at a corresponding contact column position, the conductive base plate and the contact column are limitedly rotatably connected, a conductive ring is fixedly sleeved on the column wall near the bottom of the contact column, and a plurality of lower rolling grooves and upper rolling grooves are evenly opened in a ring shape on the opposite sides of the conductive base plate and the conductive ring, and balls are rollingly connected between any corresponding lower rolling grooves and upper rolling grooves in the same vertical direction.

[0018] Furthermore, the auxiliary adjustment unit includes a locking component arranged on the rotating component and an unlocking component arranged on the pushing component; the locking component includes an active cavity symmetrically opened in the conductive ring about the snap-fitting groove, the active cavity is connected to a fourth spring on the cavity wall close to the pressing cavity, the other end of the fourth spring is connected to a moving rod, the moving rod movably penetrates the active cavity at one end away from the fourth spring and is connected to a moving block, a plurality of slots are evenly and equidistantly opened in a ring shape on the conductive bottom plate, an insertion rod is movably arranged in the slot, one end of the insertion rod away from the slot bottom passes through the slot and is connected to the corresponding side wall of the moving block, and a second inclined surface is arranged on the top of the moving block close to the snap-fitting groove.

[0019] Furthermore, the unlocking component includes a long sliding hole symmetrically opened on the contact column with respect to the pushing block, the pushing block is symmetrically connected to two pushing plates, the other end of the pushing plate passes through the corresponding sliding hole and extends outward, a lifting rod is movably penetrated through the pushing plate located outside the contact column, the other end of the lifting rod is connected to a wedge block, a moving ring is fixedly sleeved on the outer wall of the lifting rod directly below the pushing plate, a fifth spring is commonly connected between the moving ring and the pushing plate, and the wedge block is arranged corresponding to the second inclined surface.

[0020] Furthermore, two third inclined surfaces are symmetrically provided on the arc-shaped caliper, and the third inclined surfaces are slidably connected to the inner wall of the clamping groove.

[0021] Beneficial effects of the present invention:

[0022] By sliding the two sliders on the connecting rod and cooperating with the second spring, the two limit blocks slide on the wall of the pressing chamber, so that the limit blocks are engaged or separated from the limit grooves, and the arc caliper is limited, thereby completing the gear adjustment of the coil winding. There is no need to frequently loosen or tighten the bolts to adjust the gear, which makes the gear adjustment more efficient and less likely to damage the transformer gear adjustment unit, making the transformer gear adjustment more convenient.

[0023] The limit block is squeezed into the pressing cavity by sliding between the arc surface and the first inclined surface, so that the slider slides on the connecting rod to squeeze the second spring. When the limit block is opposite to the limit groove, the slider slides in the opposite direction on the connecting rod under the action of the second spring returning, driving the limit block to move into the limit groove and engage with the limit groove to limit the arc caliper, thereby eliminating the need to push the pushing component, so that the pushing component pushes the extruding component and then squeezes the engaging component, thereby simplifying the steps of gear adjustment and saving the time of gear adjustment.

[0024] By rotating the connecting piece, the arc caliper is separated from the previous contact column, and under the action of the first spring, the arc caliper pops out of the U-shaped groove, and the third inclined surface slides with the inner wall of the clamping groove, so that the arc caliper re-enters the U-shaped groove. When the arc caliper is opposite to the clamping groove, under the action of the first spring, the arc caliper slides out of the U-shaped groove and clamps with the clamping groove, thereby eliminating the need to push the arc caliper into the U-shaped groove again, thereby completing the clamping of the arc caliper and the clamping groove, making the gear adjustment smoother and reducing the complexity of the gear adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the gear adjustment unit of the present invention;

[0027] Figure 3 It is a schematic diagram of the contact column structure of the present invention;

[0028] Figure 4 It is a schematic cross-sectional structural diagram of a connecting component of the present invention;

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the contact column of the present invention;

[0030] Figure 6 It is a schematic diagram of the connection structure between the extrusion component and the unlocking component of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the extrusion component of the present invention;

[0032] Figure 8 It is a schematic diagram of the local structure of the extrusion component of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the locking component of the present invention;

[0034] Fig.10 For the present invention Fig. 9 Enlarged structural diagram at A in the middle.

[0035] In the figure:

[0036] 1. Coil winding; 21. Contact column; 22. Snap-on groove; 23. Pressing cavity; 3. Connecting component; 31. Arc caliper; 32. Connecting piece; 33. U-shaped groove; 34. First spring; 35. Limiting rod; 4. Snap-on component; 41. Connecting rod; 42. Second spring; 43. Sliding block; 44. Limiting block; 45. First inclined surface; 46. Limiting groove; 47. Arc surface; 5. Extruding component; 51. Third extruding rod; 52. Pin shaft; 53. First extruding rod; 54. Second extruding rod; 55. Limiting frame; 6. Pushing component; 6 1. Push block; 62. Third spring; 63. Push rod; 64. Handle; 7. Rotating component; 71. Ball; 72. Conductive bottom plate; 73. Conductive ring; 74. Upper rolling groove; 75. Lower rolling groove; 8. Locking component; 81. Moving rod; 82. Active cavity; 83. Fourth spring; 84. Second inclined plane; 85. Moving block; 86. Insert rod; 87. Slot; 9. Unlocking component; 91. Push plate; 92. Lifting rod; 93. Moving ring; 94. Fifth spring; 95. Wedge block; 96. Sliding hole; 10. Third inclined plane. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] Example 1, reference Figure 1-Figure 10, which is the first embodiment of the present invention, provides a dry-type transformer, including multiple groups of coil windings 1, multiple contact posts 21 are alternately installed on the coil windings 1, and also include a gear adjustment unit installed on each coil winding 1 for connecting any two staggered adjacent contact posts 21, and an auxiliary adjustment unit is installed on the gear adjustment unit; the gear adjustment unit includes an annular clamping groove 22 opened on the column wall of the contact post 21, a pressing cavity 23 is opened in the contact post 21, a connecting component 3 is installed between any two staggered adjacent contact posts 21, a clamping component 4 is installed in the pressing cavity 23, an extrusion component 5 is installed on the clamping component 4, a pushing component 6 is installed on the extrusion component 5, and a rotating component 7 is installed on the column wall of the contact post 21 near the bottom end; the connecting component 3 includes a connecting piece 32 arranged between the two contact posts 21, and the connecting piece Arc calipers 31 are slidably connected at both ends of 32, and a limiting component is commonly connected between the arc caliper 31 and the connecting piece 32. One end of the arc caliper 31 away from the center of the connecting piece 32 extends to the outside of the connecting piece 32 and is clamped with the corresponding clamping groove 22. The arc caliper 31 is conductively and slidably connected to the connecting piece 32; the clamping component 4 includes a connecting rod 41 fixedly connected to the inner wall of the pressing cavity 23 near the bottom, and two sliders 43 are symmetrically slidably connected to the connecting rod 41. A second spring 42 is fixedly connected between the two sliders 43, and the second spring 42 is sleeved on the connecting rod 41. The two sliders 43 are fixedly connected to limiting blocks 44 on their back sides. Two limiting grooves 46 are symmetrically provided on the arc caliper 31, and the end of the limiting block 44 away from the slider 43 is sealed and movable through the cavity wall of the pressing cavity 23 and extends to the corresponding limiting groove 46.

[0039] Specifically, the gear adjustment unit is provided to adjust the gear of the coil winding 1. During the gear adjustment, the connecting piece 32 can be rotated by hand so that one end of the connecting piece 32 rotates around the contact column 21 on one side, and the other end of the connecting piece 32 is separated from the other contact column 21, that is, one end of the connecting piece 32 rotates around the other end thereof, so as to realize the switching of adjacent contact columns 21. Before adjustment, first unlock one end of the arc caliper 31 so that it can rotate. At this time, press the pushing component 6, so that the pushing component 6 presses down the squeezing component 5, and the squeezing component 5 presses down the clamping component 4, so that the two sliders 43 slide toward each other on the connecting rod 41, compress the second spring 42, and drive the two limit blocks 44 to slide toward each other and retract into the pressing cavity 23, so that the limit blocks 44 disengage from the limit grooves 46, and at the same time the auxiliary adjustment unit is driven to move downward synchronously; the arc caliper 31 is squeezed when the auxiliary adjustment unit moves downward, so that the arc caliper 31 is retracted into the connecting piece 32; at this time, use the other hand to pull the connecting component 3, and under the action of the rotating component 7, one end of the connecting component 3 drives the contact column 21 to rotate, and when the other end of the connecting component 3 is facing the other contact column 21, the arc caliper 31 will automatically engage with the contact column 21 facing it. When the pushing component 6 stops being pressed down, the pushing component 6 and the clamping component 4 are reset, and the arc clamp 31 is clamped again, so that the contact column 21 is locked after switching. There is no need to frequently loosen or tighten the bolts to adjust the gear position, so that the gear adjustment efficiency is higher, and it is not easy to damage the transformer gear adjustment unit, making the transformer gear adjustment more convenient.

[0040] Reference Figure 2 and Figure 4 The limiting assembly includes U-shaped grooves 33 symmetrically opened at both ends of the connecting piece 32, and two arc calipers 31 are respectively slidably connected to the inner sides of the two U-shaped grooves 33, and a first spring 34 is fixedly connected between the arc calipers 31 and the bottom of the corresponding U-shaped grooves 33. The opposite ends of the two first springs 34 are fixedly connected to the connecting piece 32, and two limiting rods 35 are fixedly connected to the opposite sides of the two arc calipers 31, and multiple limiting rods 35 are movably connected to the connecting piece 32.

[0041] Specifically, when adjusting the gear, one of the arc calipers 31 slides into the corresponding U-shaped groove 33, squeezing the first spring 34, so that the limit rod 35 slides on the connecting piece 32, making the arc caliper 31 slide more stably. When the arc caliper 31 no longer slides into the U-shaped groove 33, under the action of the first spring 34, the arc caliper 31 slides to the outside of the U-shaped groove 33 and engages with the corresponding engaging groove 22. There is no need to loosen the bolts and remove the connecting piece 32 to adjust the gear. When adjusting the gear, the connecting piece 32 is not easy to be lost, making the gear adjustment more convenient.

[0042] Reference Figure 3 and Figure 4 The clamping component 4 further includes a first inclined surface 45 formed on the limit block 44 , and two symmetrically distributed arc surfaces 47 are formed on the arc caliper 31 , and the first inclined surface 45 is slidably connected to the arc surface 47 .

[0043] Specifically, when the gear is adjusted, the arc caliper 31 will be engaged with the engaging groove 22, and the arc surface 47 slides with the first inclined surface 45 to squeeze the limit block 44 into the pressing cavity 23, so that the slider 43 slides on the connecting rod 41 and compresses the second spring 42. When the limit block 44 is opposite to the limit groove 46, the second spring 42 is reset, so that the slider 43 slides on the connecting rod 41 away from the center of the pressing cavity 23, driving the limit block 44 to move into the limit groove 46 and engage with the limit groove 46 to limit the arc caliper 31. There is no need to push the pushing component 6, so that the pushing component 6 pushes the extruding component 5, and then squeezes the engaging component 4, so that the limit block 44 retracts into the pressing cavity 23, and the arc caliper 31 is engaged with the engaging groove 22, and then the pushing component 6 is released, so that the limit block 44 is engaged with the inner side of the limit groove 46, which simplifies the steps of gear adjustment and saves the time of gear adjustment.

[0044] Example 2, reference Figure 5-Figure 8 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the extrusion component 5 includes two first extrusion rods 53 symmetrically hinged on the inner cavity wall of the pressing cavity 23 near the top, the bottom of the first extrusion rod 53 is hinged with a second extrusion rod 54, the bottom of the second extrusion rod 54 is rotatably connected to a third extrusion rod 51, the bottom of the third extrusion rod 51 is hinged to the slider 43, the top of the third extrusion rod 51 is fixedly connected with a pin 52, the position of the inner cavity wall of the pressing cavity 23 corresponding to the pin 52 is fixedly connected to a limiting frame 55, and the pin 52 is slidably connected between the inner cavity wall of the pressing cavity 23 and the limiting frame 55.

[0045] Specifically, the pushing component 6 pushes the first extrusion rod 53 to rotate in the pressing cavity 23, drives the second extrusion rod 54 to rotate, and drives the third extrusion rod 51 to rotate. Since the shaft wall of the pin shaft 52 contacts the inner side of the limit frame 55 and is slidably connected with the limit frame 55, the pin shaft 52 slides downward on the limit frame 55, so that the bottom of the third extrusion rod 51 swings toward the middle of the pressing cavity 23, drives the slider 43 on the connecting rod 41 to slide toward the center of the connecting rod 41, compresses the second spring 42, causes the limit block 44 to retract into the pressing cavity 23, and the pushing component 6 stops. The first extrusion rod 53 is pushed and the second spring 42 is reset, so that the slider 43 slides on the connecting rod 41 away from the center of the connecting rod 41, so that the bottom of the third extrusion rod 51 swings away from the middle of the pressing cavity 23, so that the pin shaft 52 slides upward on the limit frame 55, driving the second extrusion rod 54 and the first extrusion rod 53 to rotate, so that the second extrusion rod 54 and the first extrusion rod 53 are at a certain angle, so that the limit block 44 extends out of the pressing cavity 23, and the arc caliper 31 can be quickly clamped and limited, so that the gear adjustment is more stable and flexible.

[0046] Reference Figure 5 and Figure 6 The pushing component 6 includes a pushing block 61 movably connected in the pressing cavity 23, a pushing rod 63 fixedly connected to the top of the pushing block 61, the upper end of the pushing rod 63 is sealed and movably penetrates the cavity top of the pressing cavity 23 and is fixedly connected with a handle 64, the other end of the pushing rod 63 is fixedly connected to the pushing block 61, and a third spring 62 is fixedly connected between the pushing block 61 and the inner cavity top of the pressing cavity 23, and the third spring 62 is sleeved on the outside of the pushing rod 63.

[0047] Specifically, when adjusting the gear, pressing the handle 64 drives the push rod 63 to move into the pressing cavity 23, drives the push block 61 to move downward in the pressing cavity 23, squeezes the first squeezing rod 53, and extends the third spring 62. When the handle 64 is no longer pressed, the third spring 62 is reset, drives the push block 61 to move upward in the pressing cavity 23, and no longer squeezes the first squeezing rod 53, which facilitates the connection and separation of the arc caliper 31 and the clamping groove 22, making the gear adjustment faster and tighter.

[0048] Reference Figure 3 , Figure 5 , Fig. 9 and Fig.10The rotating component 7 includes a conductive bottom plate 72 fixedly connected to the coil winding 1 at a position corresponding to the contact column 21, the conductive bottom plate 72 is connected to the contact column 21 for limited rotation, a conductive ring 73 is fixedly sleeved on the column wall near the bottom of the contact column 21, and a plurality of lower rolling grooves 75 and upper rolling grooves 74 are evenly and annularly formed on the opposite sides of the conductive bottom plate 72 and the conductive ring 73, and a ball 71 is rollingly connected between any corresponding lower rolling grooves 75 and upper rolling grooves 74 in the same vertical direction.

[0049] Specifically, when the gear is adjusted, one end of the connecting component 3 drives the contact column 21 to rotate, and the arc caliper 31 is located in the clamping groove 22, and the bottom is in contact with the top of the conductive ring 73. When the arc caliper 31 rotates, the contact column 21 rotates on the conductive bottom plate 72, and the conductive ring 73 and the conductive bottom plate 72 rotate relative to each other, so that the ball 71 rolls in the upper rolling groove 74 and the lower rolling groove 75, and then the connecting component 3 can drive the contact column 21 to rotate when rotating, so that when the gear is adjusted, it is not necessary to remove the connecting piece 32 from the contact column 21, and the operation is more convenient. The rest of the structure is the same as that of Example 1.

[0050] Example 3, reference Figure 2 , Figure 3 , Figure 5 , Fig. 9 and Fig.10 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the auxiliary adjustment unit includes a locking component 8 installed on the rotating component 7, and an unlocking component 9 installed on the pushing component 6; the locking component 8 includes an active cavity 82 symmetrically opened in the conductive ring 73 about the clamping groove 22, and the active cavity 82 is fixedly connected to a fourth spring 83 on the cavity wall close to the pressing cavity 23, and the other end of the fourth spring 83 is fixedly connected to a moving rod 81, and the moving rod 81 moves through the active cavity 82 at one end away from the fourth spring 83 and is fixedly connected to a moving block 85, and a plurality of slots 87 are evenly and equidistantly opened in an annular shape on the conductive bottom plate 72, and an insertion rod 86 is movably connected in the slot 87, and one end of the insertion rod 86 away from the bottom of the slot 87 passes through the slot 87 and is fixedly connected to the corresponding side wall of the moving block 85, and a second inclined surface 84 is opened on the top of the moving block 85 near the clamping groove 22.

[0051] Specifically, the auxiliary adjustment unit can be used to assist in gear adjustment, making the gear adjustment faster. When the arc caliper 31 leaves the clamping groove 22 on the contact column 21, under the action of the fourth spring 83, the moving rod 81 and the moving block 85 are driven to move toward the side of the clamping groove 22, and the insertion rod 86 is driven to move toward the side of the conductive bottom plate 72, so that the insertion rod 86 is plugged into the inner side of the slot 87. Under the action of the moving rod 81, the conductive ring 73 is limited, and then the docking column 21 is limited, so that when the arc caliper 31 leaves the clamping groove 22, the contact column 21 maintains the angle of the arc caliper 31 when it leaves unchanged. When the arc caliper 31 is clamped with the clamping groove 22 on this contact column 21 again, the contact column 21 does not need to be rotated, and the arc caliper 31 can be directly clamped with the clamping groove 22, which saves the time for gear adjustment and reduces the trial and error rate.

[0052] Reference Figure 2 and Figure 3 The unlocking component 9 includes a long sliding hole 96 symmetrically opened on the contact column 21 with respect to the pushing block 61. The pushing block 61 is symmetrically fixedly connected with two pushing plates 91. The other end of the pushing plate 91 passes through the corresponding sliding hole 96 and extends outward. A lifting rod 92 is movably penetrated on the pushing plate 91 outside the contact column 21. The other end of the lifting rod 92 is fixedly connected with a wedge block 95. A moving ring 93 is fixedly sleeved on the outer wall of the lifting rod 92 directly below the pushing plate 91. A fifth spring 94 is fixedly connected between the moving ring 93 and the pushing plate 91. The wedge block 95 is arranged corresponding to the second inclined surface 84.

[0053] Specifically, when the gear is adjusted, there are two directions of the contact column 21, one facing upward and the other facing downward. When the gear is adjusted, the contact column 21 faces opposite directions, the arc caliper 31 cannot be engaged with the engaging groove 22, and the gear adjustment cannot be completed. When the push block 61 moves downward in the pressing cavity 23, it drives the push plate 91 to move downward in the sliding hole 96, and drives the lifting rod 92 and the wedge block 95 to move downward at the same time. When the wedge block 95 conflicts with the arc caliper 31, The limit block 44 is still engaged with the limit groove 46. Under the action of the arc caliper 31, the wedge block 95 drives the lifting rod 92 to move upward, drives the moving ring 93 to move upward, and compresses the fifth spring 94. When the limit block 44 is separated from the limit groove 46, the fifth spring 94 is reset, drives the lifting rod 92 and the wedge block 95 to move downward, and squeezes the arc caliper 31, so that the arc caliper 31 is separated from the engaging groove 22. At the same time, when the wedge block 95 moves downward, it will be on the second inclined surface 8 4, pushes the moving block 85 away from the clamping groove 22, drives the moving rod 81 to move to the outside of the active cavity 82, so that the fourth spring 83 is stretched, so that the insertion rod 86 is separated from the slot 87. At this time, the contact column 21 is in an unlocked state and can be rotated at will. When the contact column 21 rotates toward the arc caliper 31, the pressing of the push block 61 is stopped, so that the push plate 91 slides upward in the sliding hole 96, drives the lifting rod 92 and the wedge block 95 to move upward, and the moving block 85 is no longer pushed. Under the action of the fourth spring 83, the movable rod 81 is driven to move into the movable cavity 82, so that the insertion rod 86 is plugged into the inner side of the slot 87, and the docking point column 21 is limited. At this time, the position of the contact column 21 and the arc caliper 31 just correspond, and the arc caliper 31 can be smoothly inserted into the clamping groove 22, so that no matter what the orientation of the contact column 21 is, the contact column 21 can be unlocked so that the orientation of the contact column 21 is opposite to the arc caliper 31, thereby reducing the complexity of gear adjustment.

[0054] Reference Figure 4 Two third inclined surfaces 10 are symmetrically formed on the arc-shaped caliper 31 , and the third inclined surfaces 10 are slidably connected to the inner wall of the clamping groove 22 .

[0055] Specifically, when the arc caliper 31 pops out from the clamping groove 22, the connecting piece 32 is rotated to separate the arc caliper 31 from the previous contact column 21. After the arc caliper 31 is separated from the previous contact column 21, the arc caliper 31 pops out from the U-shaped groove 33 under the action of the first spring 34. When the arc caliper 31 rotates to the next contact column 21, the third inclined surface 10 slides with the inner wall of the clamping groove 22, so that the arc caliper 31 When the arc caliper 31 is re-entered into the U-shaped groove 33 and faces the clamping groove 22, the arc caliper 31 slides out of the U-shaped groove 33 and clamps with the clamping groove 22 under the action of the first spring 34, so that the arc caliper 31 does not need to be pushed into the U-shaped groove 33 again, and the clamping of the arc caliper 31 and the clamping groove 22 is completed, so that the gear adjustment is smoother and there will be no jamming due to the arc caliper 31 and the clamping groove 22. The rest of the structure is the same as that of Example 2.

[0056] In summary, the working principle of the present invention is as follows: when adjusting the gear position, the handle 64 is pressed, so that the push rod 63 drives the push block 61 to move downward in the pressing cavity 23, and the two sides of the bottom of the push block 61 press down the first extrusion rod 53, and the first extrusion rod 53 presses down to make the second extrusion rod 54 and the third extrusion rod 51 rotate, so that the third extrusion rod 51 drives the bottom slider 43 and the limit block 44 to retract into the pressing cavity 23, at this time, the limit block 44 unlocks the arc caliper 31; when the push block 61 moves downward, During the process, the push block 61 drives the push plate 91 to slide downward in the sliding hole 96, so that the lifting rod 92 and the wedge block 95 move downward at the same time. The inclined surface at the bottom of the wedge block 95 will squeeze one end of the arc caliper 31 during the downward movement, so that the arc caliper 31 moves out of the clamping groove 22. When the push block 61 pushes the unlocking component 9 and the squeezing component 5 to move downward, the squeezing component 5 first drives the clamping component 4 to unlock the arc caliper 31, and then the wedge block 95 in the unlocking component 9 pushes the arc caliper 31 away from the clamping groove 22. The connecting piece 32 is rotated to drive the arc caliper 31 to rotate. When the arc caliper 31 rotates to the next contact column 21, the downward moving contact column 21 squeezes the third inclined surface 10 so that the arc caliper 31 automatically retracts. When the contact column 21 is just opposite to the arc caliper 31, the arc caliper 31 is automatically stuck to achieve the locking effect.

[0057] When the clamping position on the contact column 21 is not aligned with the position of the arc caliper 31, the handle 64 is pressed, and the push block 61 moves downward in the pressing cavity 23, driving the push plate 91 to move downward in the sliding hole 96, driving the lifting rod 92 and the wedge block 95 to move downward at the same time, and the wedge block 95 will slide on the second inclined surface 84, pushing the moving block 85 away from the clamping groove 22, driving the moving rod 81 to move to the outside of the active cavity 82, so that the fourth spring 83 is stretched, so that the insertion rod 86 is separated from the slot 87, and the contact column 21 is unlocked. State, can be rotated at will, when the contact column 21 rotates toward the arc caliper 31, release the handle 64, the third spring 62 resets, drives the push plate 91 and the wedge block 95 to move upward, the fourth spring 83 resets, drives the moving rod 81 to move into the active cavity 82, makes the insertion rod 86 and the slot 87 clamped, locks the contact column 21, repeats the above steps to complete the clamping of the arc caliper 31 and the clamping slot 22, facilitates the gear adjustment of the transformer, does not need to frequently loosen and tighten the bolts, and makes the gear adjustment efficiency higher.

[0058] When the gear adjustment unit needs to be adjusted by the cross-connection point column 21, the two sides of the gear adjustment unit can be directly unlocked respectively, and then the cross-connection point column 21 can be adjusted. The switching is convenient and fast, and the adjustment of different gear voltages can be quickly achieved.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A dry-type transformer, comprising a plurality of coil windings, on which a plurality of contact posts are alternately arranged, characterized in that: It also includes a gear adjustment unit arranged on each coil winding for connecting any two adjacent staggered contact posts, and an auxiliary adjustment unit is arranged on the gear adjustment unit; The gear adjustment unit includes an annular clamping groove formed on the wall of the contact column, a pressing cavity is provided in the contact column, a connecting component is provided between any two adjacent contact columns, a clamping component is provided in the pressing cavity, an extrusion component is provided on the clamping component, a pushing component is provided on the extrusion component, and a rotating component is provided on the wall of the contact column near the bottom end; The connecting component includes a connecting piece arranged between two contact posts, arc-shaped clamps are slidably connected in both ends of the connecting piece, a limit assembly is commonly connected between the arc-shaped clamp and the connecting piece, one end of the arc-shaped clamp away from the center of the connecting piece extends to the outside of the connecting piece and is clamped with a corresponding clamping groove, and the arc-shaped clamp is conductively and slidably connected to the connecting piece; The clamping component includes a connecting rod connected to the inner wall of the pressing cavity near the bottom, two sliders are symmetrically slidably connected to the connecting rod, a second spring is connected between the two sliders, the second spring is sleeved on the connecting rod, the two sliders are connected to the back sides of the two sliders, and two limiting grooves are symmetrically provided on the arc-shaped caliper, and the end of the limiting block away from the slider is sealed and movable to penetrate the cavity wall of the pressing cavity and extend into the corresponding limiting groove; The limit assembly includes U-shaped grooves symmetrically opened at both ends of the connecting piece, two arc-shaped calipers are respectively slidably connected to the inner sides of the two U-shaped grooves, a first spring is commonly connected between the arc-shaped calipers and the groove bottoms of the corresponding U-shaped grooves, the opposite ends of the two first springs are connected to the connecting piece, and two limit rods are respectively connected to the opposite sides of the two arc-shaped calipers, and the plurality of limit rods are movably connected to the connecting piece through the connection; The clamping component also includes a first inclined surface arranged on the limiting block, and the arc-shaped caliper is provided with two symmetrically distributed arc-shaped surfaces, and the first inclined surface is slidably connected to the arc-shaped surfaces.

2. The dry-type transformer according to claim 1, characterized in that: The extrusion component includes two first extrusion rods symmetrically hinged on the inner cavity wall of the pressing cavity near the top, the second extrusion rod is hinged at the bottom of the first extrusion rod, the third extrusion rod is rotatably connected to the bottom of the second extrusion rod, the bottom of the third extrusion rod is hinged to the slider, the top of the third extrusion rod is connected to a pin, and a limiting frame is connected to the position of the inner cavity wall of the pressing cavity corresponding to the pin, and the pin is movably arranged between the inner cavity wall of the pressing cavity and the limiting frame.

3. The dry-type transformer according to claim 1, characterized in that: The pushing component includes a pushing block movably arranged in the pressing cavity, a pushing rod connected to the top of the pushing block, a handle connected to the cavity top that seals and movably passes through the pressing cavity at the upper end of the pushing rod, the other end of the pushing rod is connected to the pushing block, and a third spring is commonly connected between the pushing block and the inner cavity top of the pressing cavity, and the third spring is sleeved on the outside of the pushing rod.

4. The dry-type transformer according to claim 3, characterized in that: The rotating component includes a conductive base plate connected to the coil winding at a corresponding contact column position, the conductive base plate and the contact column are limitedly rotatably connected, a conductive ring is fixedly sleeved on the column wall near the bottom of the contact column, and a plurality of lower rolling grooves and upper rolling grooves are evenly opened in a ring shape on the opposite sides of the conductive base plate and the conductive ring, and balls are rollingly connected between any corresponding lower rolling grooves and upper rolling grooves in the same vertical direction.

5. The dry-type transformer according to claim 4, characterized in that: The auxiliary adjustment unit includes a locking component arranged on the rotating component and an unlocking component arranged on the pushing component; the locking component includes an active cavity symmetrically opened in the conductive ring about the snap-fitting groove, a fourth spring is connected to the cavity wall of the active cavity close to the pressing cavity, the other end of the fourth spring is connected to a moving rod, the moving rod movably penetrates the active cavity at one end away from the fourth spring and is connected to a moving block, a plurality of slots are evenly and equidistantly opened in a ring shape on the conductive bottom plate, an insertion rod is movably arranged in the slot, one end of the insertion rod away from the slot bottom passes through the slot and is connected to the corresponding side wall of the moving block, and a second inclined surface is arranged on the top of the moving block close to the snap-fitting groove.

6. The dry-type transformer according to claim 5, characterized in that: The unlocking component includes a long sliding hole symmetrically opened on the contact column with respect to the pushing block, the pushing block is symmetrically connected to two pushing plates, the other end of the pushing plate passes through the corresponding sliding hole and extends outward, a lifting rod is movably penetrated on the pushing plate outside the contact column, the other end of the lifting rod is connected to a wedge block, a moving ring is fixedly sleeved on the outer wall of the lifting rod directly below the pushing plate, a fifth spring is commonly connected between the moving ring and the pushing plate, and the wedge block is arranged corresponding to the second inclined surface.

7. The dry-type transformer according to claim 1, characterized in that: The arc-shaped caliper is symmetrically provided with two third inclined surfaces, and the third inclined surfaces are slidably connected to the inner wall of the clamping groove.

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