Excitation-free voltage regulation traction transformer

Abstract

The invention relates to the field of transformers, in particular to a non-excitation voltage regulation traction transformer which comprises a transformer body, a tap switch base arranged on the transformer body in an inserted mode and a protective cover arranged on the tap switch base in a sleeving mode. And the static contact is electrically connected to the top of the tap switch base and sleeves the shaft rod. According to the invention, the problem that fine metal dust (scrap iron and copper powder) is mixed with oil stain and water vapor, so that the metal dust is easy to adhere to the plugging groove on the surface of the static contact and is gradually accumulated to form an isolation layer with an insulation characteristic is solved. The isolating layer can not only prevent the effective contact between a moving contact and a static contact plugging groove to reduce the contact surface and reduce the conductive performance, but also aggravate the mechanical wear and further increase the contact resistance due to the fact that hard particles (sand grains) of dirt are embedded into the surface of the contact.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transformers, in particular to a no-load voltage regulation traction transformer. BACKGROUND

[0002] The no-load voltage regulation traction transformer is a kind of traction transformer that can change the turns ratio by adjusting the high-voltage side winding tap in the state of complete power-off of the transformer (i.e. both primary and secondary sides are disconnected from the power supply, no excitation current), and then realize voltage regulation.

[0003] For example, in the patent with the application number CN202223575098.2 and the patent name of a no-load voltage regulation single-phase traction transformer system for direct power supply mode, the core is provided with a low-voltage coil, a high-voltage regulation coil and a high-voltage coil from inside to outside, the high-voltage coil does not have any tap, and the middle part of the high-voltage coil is provided with a breakpoint, and the first and last ends of the high-voltage regulation coil are connected to the two ends of the breakpoint. The utility model solves the problem of significant ampere-turn imbalance in the existing no-load transformer, which produces a lot of transverse magnetic flux, resulting in a short-circuit mechanical force much larger than that of a conventional no-load voltage regulation transformer and significant eddy current loss in the oil tank, clamp and other steel structural parts. By arranging the high-voltage regulation coil between the low-voltage coil and the high-voltage coil, and connecting the high-voltage regulation coil to the breakpoint in the middle of the high-voltage coil, the ampere-turn imbalance between the high-voltage coil and the low-voltage coil under any tap voltage on the high-voltage side is reduced to a minimum. However, the existing no-load voltage regulation traction transformer still has some deficiencies.

[0004] The existing no-load voltage regulation traction transformer is usually arranged beside the railway, and the operating rod of the tap switch and the gap between the shell and the body sealing weak point are easy to become the invasion path of pollutants. The metal powder produced by the wear of the rail along the railway, the crushed stone dust of the ballast, the oil stains produced by the train maintenance or oil leakage, and the humid water vapor and other pollutants can penetrate into the inside of the tap switch through these gaps. Among them, the fine metal dust (such as iron filings and copper powder) mixed with oil stains and water vapor is easy to adhere to the plug-in slot on the surface of the static contact, and gradually accumulates to form an "isolating layer" with insulation characteristics. The isolating layer not only hinders the effective contact between the moving contact and the plug-in slot of the static contact, resulting in reduced contact area and decreased conductivity, but also exacerbates mechanical wear due to the embedding of hard particles (such as sand) on the surface of the contact, further increasing the contact resistance. SUMMARY

[0005] In view of the above, the purpose of the present application is to provide a no-field voltage regulation traction transformer to solve the problem that the tap switch of the no-field voltage regulation traction transformer in the prior art is easy to adhere to the plug-in slot on the surface of the static contact due to the mixing of fine metal dust (such as iron filings and copper powder) and oil dirt, water vapor, and gradually accumulates to form an "isolating layer" with insulation characteristics. The isolating layer not only hinders the effective contact between the moving contact and the plug-in slot of the static contact, resulting in reduced contact area and decreased electrical conductivity, but also exacerbates mechanical wear due to the embedding of hard particles (such as sand) on the contact surface, further increasing the contact resistance.

[0006] Based on the above purpose, the present application provides a no-field voltage regulation traction transformer, comprising a transformer body, a tap switch base inserted on the transformer body, and a protective cover sleeved on the tap switch base, the tap switch base further comprising: a shaft rod rotatably arranged at the center of the top of the tap switch base; an electrically connected static contact on the top of the tap switch base and sleeved on the shaft rod, and plug blocks arranged at equal angles on the static contact, and a cleaning structure rotatably arranged in the static contact for cleaning dirt in the plug-in slot; a linkage rotating drum sleeved on the shaft rod, and a push block rotatably arranged at the top of the linkage rotating drum; a moving contact fixedly connected to the top of the push block, and a drive assembly arranged at one end of the moving contact in the linkage rotating drum for driving the cleaning structure to clean the plug-in slot; a vibration source conversion assembly arranged on the transformer body to drive the drive assembly to rotate by vibration conversion; the cleaning structure comprises: a second slide rod arranged at equal angles on the inner wall of the static contact, a cleaning arm rotatably arranged on the second slide rod, a first slide rod arranged through the cleaning arm to drive the cleaning arm to swing, and a cleaning brush arranged at the end of the cleaning arm for cleaning dirt in the plug-in slot.

[0007] Further, the cleaning structure further comprises a pressing rod slidably arranged on the plug block, the bottom of the pressing rod is connected to the top of the cleaning arm, the top of the static contact is provided with first slide grooves arranged at equal angles, and one end of the first slide rod is slidably arranged in the first slide groove.

[0008] Further, the first slide rod is arranged at the center of the first slide groove, and third springs are arranged on both sides of the first slide rod, a fourth spring is sleeved on the second slide rod, and the top of the fourth spring is connected to the bottom of the cleaning arm.

[0009] Further, the drive assembly comprises: protrusions arranged at equal angles on the outer wall of the linkage rotating drum for driving the cleaning arm to swing left and right, a pressing disc rotatably arranged in the linkage rotating drum, and a transmission drum rotatably connected to the pressing disc. The driving teeth arranged at the top of the transmission drum in equiangular distribution, the lower pressing turntable is arranged at the top of the transmission drum, and the outer wall of the transmission drum is provided with a curved groove.

[0010] Further, the bottom of the linkage drum is provided with a tooth groove arranged in equiangular distribution, and the tooth groove is engaged with the driving teeth.

[0011] Further, the top of the driving teeth is inclined on both sides, and the slot of the tooth groove is a guide slope for the insertion engagement of the driving teeth.

[0012] Further, the vibration source conversion assembly comprises: The connecting rod is fixedly connected to the top of the transformer body, the inertial block is slidably arranged on the connecting rod, and the connecting rod is fixedly connected to the outer wall of one side of the inertial block; The driving rod is fixedly connected to one side of the connecting rod, and one end of the driving rod is arranged in the curved groove for reciprocating driving the transmission drum to rotate.

[0013] Further, the first spring arranged in symmetrical distribution on the connecting rod is connected to the top and bottom of the inertial block, respectively.

[0014] Further, the adjusting rod is rotatably arranged on the movable contact, the torsional spring is arranged in the rotating shaft of the movable contact, the bottom of the adjusting rod is fixedly connected with the pressing block, the pressing block is in contact with the top of the pressing rod, and the bottom of the adjusting rod is matched and inserted with the insertion groove on the insertion block.

[0015] Further, the connecting disc is fixedly connected to the outer wall of one end of the shaft rod in the push block, the second spring is arranged on the connecting disc, and the second spring is sleeved on the shaft rod and connected to the top inner wall of the push block.

[0016] The beneficial effects of the present application are as follows: 1. In the manual shifting stage, the operator first pulls the movable contact upward and presses it downward, at this time, the push block is self-locked through the internal elastic ball and the ball groove in the inner wall of the linkage drum. During the pressing process of the push block, the driving lower pressing turntable is synchronously lowered, driving the transmission drum to disengage from the engagement state with the linkage drum. Then, rotating the movable contact makes the linkage drum start to rotate, the protrusion arranged on the outer wall of the linkage drum drives one end of the cleaning arm, and the cleaning arm swings to one side with the second slide rod as the axis. At this time, the first slide rod slides in the first slide groove on the top of the static contact, and the elastic return system composed of the third spring and the fourth spring drives the cleaning arm to make reciprocating swing movement, finally, the cleaning brush at the end of the cleaning arm deeply cleans the insertion groove of the current insertion block, effectively removing the accumulated dust and dirt in the insertion groove; 2、When the train passes through the track, the vertical vibration force generated by the transformer body is transmitted to the support rod, prompting the inertia block slidingly arranged on the support rod to make reciprocating motion against the elastic force of the first spring. The fixed connecting rod of the inertia block side wall synchronously drives the driving rod to move up and down, the end of the driving rod is embedded in the curved groove opened in the outer wall of the transmission rotating drum, and the curved surface track of the groove wall converts the linear motion into the rotary motion of the transmission rotating drum. At this time, the driving teeth with equal angle distribution at the top of the transmission rotating drum realize self-adaptive meshing with the guide slope of the tooth groove at the bottom of the linkage rotating drum through the inclined surface at the top thereof, and drive the linkage rotating drum to rotate synchronously with the transmission rotating drum. The protrusion on the outer wall of the linkage rotating drum immediately actuates the end of the cleaning arm which is not locked by the down pressing rod, prompting the cleaning arm to swing with the second sliding rod as the axis, the first sliding rod slides in the first sliding groove of the static contact, and the cleaning arm is driven to make reciprocating swinging motion through the horizontal reset force of the third spring, and finally the cleaning brush continuously cleans the unused plug-in block slot. Thus, the automatic maintenance function without external power supply is realized, the low dirt state of all the slots is ensured, and the mixed insulation isolation layer of dust and oil stains is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only illustrate the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 It is a whole schematic diagram of the no-field voltage regulation traction transformer in the present application. Figure 2 It is an exposed state isometric view of the tap changer of the no-field voltage regulation traction transformer in the present application. Figure 3 It is a schematic diagram of the tap changer in the present application. Figure 4 It is an internal section view of the vibration source driving assembly in the present application. Figure 5 It is a schematic diagram of the vibration source driving assembly inside the tap changer in the present application. Figure 6 It is an internal section view of the vibration source conversion assembly in the present application. Figure 7 It is a schematic diagram of the static contact and cleaning structure in the present application. Figure 8 It is Figure 4 It is an enlarged view of the structure at A in the present application. Figure 9 It is a plan state diagram of the driving teeth and the tooth groove.

[0019] The marks in the figure are: 1, transformer body; 2, protective cover; 3, tapping switch base; 4, static contact; 401, first sliding groove; 5, moving contact; 501, push block; 6, adjusting rod; 7, plug; 8, cleaning brush; 9, pressing rod; 10, supporting rod; 11, first spring; 12, inertia block; 13, connecting rod; 14, linkage rotating drum; 1401, protrusion; 15, transmission rotating drum; 1501, curved slot; 1502, driving tooth; 16, driving rod; 17, second spring; 18, pressing rotary disc; 19, third spring; 20, cleaning arm; 21, first sliding rod; 22, second sliding rod; 23, fourth spring. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with specific examples.

[0021] It should be noted that, unless otherwise defined, technical terms or scientific terms used in the present application should be understood as their common meanings to those skilled in the art to which the present application pertains. The terms "first", "second" and similar terms used in the present application do not indicate any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the components or objects listed before the terms cover the components or objects listed after the terms and their equivalents, without excluding other components or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like only represent relative positional relationships, which can change accordingly when the absolute positions of the described objects change.

[0022] The first aspect of the present application provides a no-excitation voltage regulation traction transformer, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 The traction transformer comprises a transformer body 1, a tapping switch base 3 inserted on the transformer body 1, and a protective cover 2 sleeved on the tapping switch base 3. The tapping switch base 3 further comprises a shaft rod rotatably arranged at the center of the top of the tapping switch base 3. A static contact 4 is electrically connected to the top of the tapping switch base 3 and sleeved on the shaft rod. Plug blocks 7 are arranged at equal angles on the static contact 4. A cleaning structure for cleaning dirt in the plug block 7 slot is rotatably arranged in the static contact 4. A linkage rotating drum 14 is sleeved on the shaft rod, and a push block 501 is slidingly and rotatably arranged at the top of the linkage rotating drum 14. A moving contact 5 is fixedly connected to the top of the push block 501, and the moving contact 5 is provided with a driving assembly for driving the cleaning structure to clean the slot at one end in the linkage rotating drum 14; A vibration source conversion assembly is arranged on the transformer body 1 to drive the driving assembly to rotate through vibration conversion; The cleaning structure comprises: A second sliding rod 22 is arranged at equal angles on the inner wall of the static contact 4, a cleaning arm 20 is rotatably arranged on the second sliding rod 22, a first sliding rod 21 is arranged through the cleaning arm 20 to drive the cleaning arm 20 to swing, and a cleaning brush 8 is arranged at the end of the cleaning arm 20 to clean the dirt in the slot.

[0023] As an embodiment of the present application, it should be noted that the transformer tap changer used in the present application is a six-grade tap changer without starting point and ending point positioning. First, when manual adjustment is needed, the movable contact 5 is upwardly rotated and pressed downwardly at random, so that the movable contact 5 drives the push block 501 to move downwardly in the linkage rotating drum 14 (the outer wall of the push block 501 is provided with a ball with elastic reset, and the inner wall of the linkage rotating drum 14 is provided with a ball groove for clamping the ball, so that the push block 501 is self-locked when moving downwardly in the linkage rotating drum 14). The push block 501 moves downwardly and pushes the downward pressing disc 18 to move downwardly. The downward pressing disc 18 drives the transmission rotating drum 15 to move downwardly and disengage from the linkage rotating drum 14. Then, the movable contact 5 is rotated, so that the linkage rotating drum 14 starts to rotate synchronously. The linkage rotating drum 14 rotates and rotates the one end of the cleaning arm 20, so that the cleaning arm 20 swings on the static contact 4 through the first slide rod 21 with the second slide rod 22 as the axis. Then, the cleaning arm 20 is reset by the elastic reset member (i.e. the third spring 19), and the first slide rod 21 drives the cleaning arm 20 to reciprocate left and right through the resilience of the elastic reset member. The cleaning arm 20 reciprocates, so that the cleaning brush 8 at one end of the cleaning arm 20 starts to clean the dust and dirt in the slot of the plug-in block 7. After the adjustment is completed, the handle driving member (i.e. the adjusting rod 6) of the movable contact 5 is inserted into the slot. When the handle driving member is inserted into the slot, the cleaning arm 20 at the bottom of the plug-in block 7 moves downwardly, so that the one end of the cleaning arm 20 is separated from the linkage rotating drum 14. Then, the movable contact 5 releases the downward pressure on the push block 501, so that the push block 501 is reset by the elastic reset member (i.e. the second spring 17) arranged inside the push block 501, and the push block 501 releases the downward pressure on the downward pressing disc 18. When the slots of other plug-in blocks 7 need to be self-cleaned, the inertia block 12 in the vibration source conversion assembly reciprocates on the supporting rod 10 by the vertical vibration force on the transformer body 1 caused by the train passing through the track (reciprocates while moving by inertia through the elastic reset member (i.e. the first spring 11) on the supporting rod 10). When the inertia block 12 reciprocates by inertia, the connecting rod 13 at one side of the inertia block 12 drives the transmission rotating drum 15 to rotate. The transmission rotating drum 15 first rotates by the reciprocating drive of the inertia block 12, and then is self-adaptively clamped into the inner wall of the linkage rotating drum 14 by the upward thrust of the connecting rod 13, and synchronously drives the linkage rotating drum 14 to rotate with the transmission rotating drum 15. When the linkage rotating drum 14 is driven to rotate by the transmission rotating drum 15, it synchronously drives the other cleaning arms 20 except the cleaning arm 20 locked by the static contact 5 to reciprocate and clean the slots of the plug-in blocks 7 which are not inserted, so that the dust in the slots of the plug-in blocks 7 which are not inserted is always kept in a small amount, effectively preventing the mixture of dust and oil stains from forming an insulating isolation layer in the slots.

[0024] As an embodiment, the present application is not limited to the above-mentioned embodiment. Figure 3 , Figure 4 , Figure 7 , Figure 8As shown, the cleaning structure further comprises a pressing rod 9 slidingly arranged on the plug 7, the bottom of the pressing rod 9 being connected with the top of the cleaning arm 20, the top of the static contact 4 being provided with first sliding grooves 401 arranged at equal angles, one end of a first sliding rod 21 being slidingly arranged in the first sliding grooves 401, the first sliding rod 21 being located at the center of the first sliding grooves 401, and third springs 19 being arranged on both sides of the first sliding rod 21, a fourth spring 23 being sleeved on a second sliding rod 22, the top of the fourth spring 23 being connected with the bottom of the cleaning arm 20.

[0025] As an embodiment, in the manual gear shifting stage, the operator first pulls the dynamic contact 5 upward and presses it, at this time, the push block 501 is self-locked by the internal elastic ball and the ball groove on the inner wall of the linkage drum 14. The push block 501 is driven to move downward during the pressing process, and the lower pressing disc 18 is synchronously lowered to drive the transmission drum 15 to disengage from the engagement state with the linkage drum 14. Then, the dynamic contact 5 is rotated to make the linkage drum 14 start to rotate, and the protrusions 1401 arranged on the outer wall of the linkage drum 14 push one end of the cleaning arm 20 to make the cleaning arm 20 swing to one side with the second sliding rod 22 as the axis. At this time, the first sliding rod 21 slides in the first sliding grooves 401 on the top of the static contact 4, and the elastic return system composed of the third springs 19 and the fourth springs 23 drives the cleaning arm 20 to make reciprocating swing movement, and finally the cleaning brush 8 at the end of the cleaning arm 20 performs deep cleaning on the current plug slot of the plug 7, effectively removing the dust and dirt accumulated in the plug slot.

[0026] As an embodiment, as shown in Figure 5 、 Figure 6 、 Figure 9 As shown, the driving assembly comprises: the protrusions 1401 arranged at equal angles on the outer wall of the linkage drum 14 to drive the cleaning arm 20 to swing left and right, the lower pressing disc 18 rotatingly arranged in the linkage drum 14, and the transmission drum 15 rotatingly connected with the lower pressing disc 18; the driving teeth 1502 arranged at equal angles on the top of the transmission drum 15, the lower pressing disc 18 rotatingly arranged on the top of the transmission drum 15, the outer wall of the transmission drum 15 being provided with a curved groove 1501, the bottom of the linkage drum 14 being provided with tooth grooves arranged at equal angles, the tooth grooves being engaged with the driving teeth 1502, the top of the driving teeth 1502 being inclined, and the slot of the tooth groove being a guide slope for the insertion engagement of the driving teeth 1502.

[0027] As an embodiment, the push block 501 is pressed down, the lower pressing disc 18 is driven to move downward at the same time, the transmission drum 15 connected with the lower pressing disc 18 is driven to move axially, and the driving teeth 1502 distributed at the top of the transmission drum 15 are disengaged from the meshing state with the tooth groove at the bottom of the linkage drum 14. Then, the movable contact 5 is rotated to drive the linkage drum 14 to rotate, the protrusion 1401 arranged on the outer wall of the linkage drum 14 drives one end of the cleaning arm 20 to swing to one side with the second sliding rod 22 as the axis. At this time, the first sliding rod 21 slides in the first sliding groove 401 at the top of the static contact 4, and the elastic reset system composed of the third spring 19 and the fourth spring 23 drives the cleaning arm 20 to swing back and forth. Specifically, the first sliding rod 21 is located at the middle of the first sliding groove 401, and the third spring 19 arranged on both sides of the first sliding rod 21 provides horizontal reset force, so that the cleaning arm 20 can quickly return after swinging. Finally, the cleaning brush 8 at the end of the cleaning arm 20 deeply cleans the slot of the current plug-in block 7, and effectively removes the dust and dirt accumulated in the slot. After the gear shifting is completed, the handle driving part of the movable contact 5 is inserted into the slot of the target plug-in block 7, at this time, the pressing rod 9 arranged on the plug-in block 7 slides downward (the fourth spring 23 is squeezed in the middle of the downward pressing, and the fourth spring 23 sleeved on the second sliding rod 22 provides vertical buffer reset, so that it can reset to the original position when the downward pressing of the movable contact 5 is released, so that the protrusion 1401 can re-contact the end of the cleaning arm 20), the corresponding cleaning arm 20 is driven to be separated from the contact with the protrusion 1401 on the outer wall of the linkage drum 14, and the push block 501 is automatically reset by the internal elastic reset part due to the release of the downward pressing force, so that the downward pressing state of the lower pressing disc 18 is released, and the preparation for the subsequent automatic maintenance stage is completed.

[0028] As an embodiment, as shown in Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As an embodiment, as shown in The support rod 10 is fixedly connected at the top of the transformer body 1, the inertia block 12 is arranged on the support rod 10 in a sliding manner, and the connecting rod 13 is fixedly connected to the outer wall of one side of the inertia block 12. The driving rod 16 is fixedly connected to one side of the connecting rod 13, one end of the driving rod 16 is arranged in the curve groove 1501 to drive the transmission drum 15 to rotate up and down, the first spring 11 is sleeved on the support rod 10 in an up-down symmetrical manner, and the first spring 11 is connected to the top and the bottom of the inertia block 12, respectively.

[0029] As the embodiment, when the train passes through the track, the vertical vibration force generated by the transformer body 1 is transmitted to the support rod 10, prompting the inertia block 12 arranged on the support rod 10 to make reciprocating motion against the elastic force of the first spring 11. The fixed connecting rod 13 on the side wall of the inertia block 12 synchronously drives the driving rod 16 to move up and down, and the end of the driving rod 16 is embedded in the curved groove 1501 arranged on the outer wall of the transmission rotating drum 15. The curved surface track of the groove wall converts the linear motion into the rotary motion of the transmission rotating drum 15. At this time, the driving teeth 1502 arranged at equal angles on the top of the transmission rotating drum 15 are self-adaptively engaged with the guide slope of the tooth groove on the bottom of the linkage rotating drum 14 by the inclined surface on the top, and the linkage rotating drum 14 is synchronously rotated with the transmission rotating drum 15. The protrusion 1401 on the outer wall of the linkage rotating drum 14 immediately pushes the end of the cleaning arm 20 which is not locked by the pressing rod 9, prompting the cleaning arm 20 to swing around the second sliding rod 22 as the axis, and the first sliding rod 21 slides in the first sliding groove 401 of the static contact 4. The cleaning arm 20 is driven to make reciprocating swinging motion by the horizontal reset force of the third spring 19, and finally the cleaning brush 8 continuously cleans the unused plug-in groove of the plug-in block 7. Thus, the automatic maintenance function without external power supply is realized, ensuring that all plug-in grooves always maintain a low-dirt state, effectively avoiding the mixture of dust and oil stains to form an insulating isolation layer.

[0030] As an embodiment, as shown in Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 , the adjusting rod 6 is arranged on the moving contact 5, a torsion spring is arranged in the rotating shaft of the moving contact 5, the bottom of the adjusting rod 6 is fixedly connected with a pressing block, the pressing block is in contact with the top of the pressing rod 9, and the bottom of the adjusting rod 6 is matched with the plug-in groove on the plug-in block 7.

[0031] As the embodiment, it should be noted that the adjusting rod 6 always maintains the plug-in state of the plug-in block 7 by the arrangement of the torsion spring. When it is lifted, the torsion spring is compressed, and when it is released, the adjusting rod 6 is inserted into the plug-in block 7 again by the reset of the torsion spring. When the adjusting rod 6 is inserted into the plug-in block 7, the pressing rod 9 drives the corresponding cleaning arm 20 to separate from the linkage rotating drum 14, and at the same time, the pushing block 501 is reset by the internal spring (i.e. the second spring 17), the pressing on the pressing rotating disc 18 is released, and the engagement between the transmission rotating drum 15 and the linkage rotating drum 14 is re-established by the vibration source conversion assembly in the non-manual state.

[0032] As an embodiment, as shown in Figure 6 , one end of the shaft rod in the pushing block 501 is fixedly connected with a connecting disc, the second spring 17 is arranged on the connecting disc, and the second spring 17 is sleeved on the shaft rod, and the top of the second spring 17 is connected with the top inner wall of the pushing block 501.

[0033] As the embodiment, when the moving contact 5 is pressed downward, the push block 501 moves axially along the shaft, compressing the second spring 17. At this time, the second spring 17 stores energy, and the push block 501 is self-locked by the internal ball and the ball groove of the linkage drum 14, so that the moving contact 5 drives the linkage drum 14 to rotate. When the moving contact 5 is released, the second spring 17 releases the elastic potential energy, and drives the push block 501 to automatically reset to the initial position, thereby releasing the downward pressure on the lower pressing turntable 18.

[0034] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary, and is not intended to imply that the scope (including claims) of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in details.

[0035] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations, and equivalents that fall within the spirit and scope of the present application are intended to be included within the scope of the claims.

Claims

1. A no-load voltage regulation traction transformer, comprising a transformer body (1), a tap changer base (3) plugged on the transformer body (1), and a protective cover (2) sleeved on the tap changer base (3), characterized in that, The tap switch base (3) further comprises: a shaft rod rotatably arranged at the center of the top of the tap switch base (3); An electrically connected static contact (4) is arranged on the top of the tap switch base (3) and sleeved on the shaft rod, and a plug-in block (7) is arranged on the static contact (4) in an equiangular distribution, and a cleaning structure for cleaning dirt in the plug-in block (7) is rotatably arranged in the static contact (4); A linkage rotating drum (14) is sleeved on the shaft rod, and a push block (501) is rotatably arranged on the top of the linkage rotating drum (14); A movable contact (5) is fixedly connected to the top of the push block (501), and one end of the movable contact (5) in the linkage rotating drum (14) is provided with a driving assembly for driving the cleaning structure to clean the plug-in block (7); A vibration source conversion assembly is arranged on the transformer body (1) to drive the driving assembly to rotate by vibration conversion. The cleaning structure comprises: A second sliding rod (22) is arranged on the inner wall of the static contact (4) in an equiangular distribution, a cleaning arm (20) is rotatably arranged on the second sliding rod (22), a first sliding rod (21) is arranged on the cleaning arm (20) to drive the cleaning arm (20) to swing, and a cleaning brush (8) is arranged on the end of the cleaning arm (20) to clean the dirt in the plug-in block (7).

2. A no-load regulation traction transformer according to claim 1, characterized in that, The cleaning structure further comprises a pressing rod (9) slidably arranged on the plug-in block (7), the bottom of the pressing rod (9) is connected to the top of the cleaning arm (20), and the top of the static contact (4) is provided with a first sliding groove (401) arranged in an equiangular distribution, and one end of the first sliding rod (21) is slidably arranged in the first sliding groove (401).

3. A no-load regulation traction transformer according to claim 2, characterized in that, The first sliding rod (21) is arranged at the center of the first sliding groove (401), and third springs (19) are arranged on both sides of the first sliding rod (21), a fourth spring (23) is sleeved on the second sliding rod (22), and the top of the fourth spring (23) is connected to the bottom of the cleaning arm (20).

4. A no-load regulation traction transformer according to claim 1, characterized in that, The driving assembly comprises: A protrusion (1401) is arranged on the outer wall of the linkage rotating drum (14) in an equiangular distribution to drive the cleaning arm (20) to swing left and right, a pressing disc (18) is rotatably arranged in the linkage rotating drum (14), and a transmission drum (15) is rotatably connected to the pressing disc (18); A driving tooth (1502) is arranged on the top of the transmission drum (15) in an equiangular distribution, the pressing disc (18) is rotatably arranged on the top of the transmission drum (15), and a curved groove (1501) is formed in the outer wall of the transmission drum (15).

5. A no-load regulation traction transformer according to claim 4, characterized in that, The bottom of the linkage rotating drum (14) is provided with a tooth groove arranged in an equiangular distribution, and the tooth groove is engaged with the driving tooth (1502).

6. A no-load regulation traction transformer according to claim 5, characterized in that, The top of the driving tooth (1502) is inclined, and the groove of the tooth groove is a guide slope for the insertion and engagement of the driving tooth (1502).

7. A no-load regulation traction transformer according to claim 1, characterized in that, The vibration source conversion assembly comprises: A supporting rod (10) is fixedly connected to the top of the transformer body (1), an inertia block (12) is slidably arranged on the supporting rod (10), and a connecting rod (13) is fixedly connected to the outer wall of one side of the inertia block (12). A driving rod (16) is fixedly connected to one side of the connecting rod (13), and one end of the driving rod (16) is arranged in a curved groove (1501) for driving the transmission rotating drum (15) to rotate up and down.

8. A no-load regulation traction transformer according to claim 7, characterized in that, A first spring (11) is arranged on the support rod (10) in a symmetrical distribution, and the first spring (11) is connected to the top and bottom of the inertia block (12) respectively.

9. A no-load regulation traction transformer according to claim 1, characterized in that, A regulating rod (6) is arranged on the movable contact (5) in rotation, a torsion spring is arranged in the rotating shaft of the movable contact (5), a pressing block is fixedly connected to the bottom of the regulating rod (6), the pressing block is in contact with the top of the lower pressing rod (9), and the bottom of the regulating rod (6) is inserted into the insertion groove on the insertion block (7).

10. A no-load regulation traction transformer according to claim 1, characterized in that, One end of the shaft rod is fixedly connected to the outer wall of the push block (501), a connecting disc is arranged on the connecting disc, a second spring (17) is arranged on the connecting disc, the second spring (17) is arranged on the shaft rod, the top of the second spring (17) is connected to the top inner wall of the push block (501).

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