Tap changer for off-load transformer and method of using same

Abstract

To provide: a tap changer for a no-load transformer including a mounting unit, a tap changing unit, and a positioning unit; and a method of using the same.SOLUTION: A tap changer for a no-load transformer includes: a mounting unit 100 including a mounting rod 101; a tap changing unit 200 including an adjustment assembly 203 provided on the mounting rod, a tap change lever 201 provided on the adjustment assembly and a tap change clamp assembly 202 provided on one end of the tap change lever and on the mounting rod; and a positioning unit 300 including a mounting rod connection assembly 301 provided on the adjustment assembly, a positioning assembly provided on the mounting rod connection assembly and a traction assembly 303 provided on the positioning assembly. The tap changer according to the present invention enables: realizing controlling opening and closing of the tap change clamp assembly by the tap change lever; easily adjusting a tap position on the no-load transformer; and fixing a position of the adjustment assembly by the traction assembly.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of transformer devices, and more particularly to a tap changer for an off-load transformer and a method for using the same. [Background technology]

[0002] Regardless of whether it is a no-load or load voltage regulating transformer, the principle of its voltage regulation is to change the voltage ratio between high and low voltages by changing the effective number of turns of the high voltage coil, aiming to maintain the voltage on the low voltage side even if the input voltage on the high voltage side changes. The so-called no-load voltage regulation can achieve the change of voltage by operating the no-load voltage regulation switch or lug only when the transformer is disconnected, while the load voltage regulation can be operated when the transformer is loaded to change the voltage ratio.

[0003] At present, when performing tap changing work of no-load voltage regulating transformer at home and abroad, it is necessary to de-energize both high-voltage side and low-voltage side of the transformer, take sufficient grounding measures, and then climb on the top of the transformer and manually adjust it with tools such as spanners and drivers. The whole work process is time-consuming and labor-intensive, and requires a large amount of manpower and materials, so it cannot meet the demand for transformer tap changing. In order to solve the above problems, the tap changing lever of the no-load transformer has been developed, but the existing tap changing lever has the problems of long overall dimensions, poor stability during operation, and difficult control in order to meet the demand for tap changing. Summary of the Invention

[0004] The present invention has been proposed in view of the above problems of the existing tap changers for unloaded transformers.

[0005] Therefore, the present invention provides a tap changer for an off-load transformer, the purpose of which is to solve the problems that in order to meet the demands of tap changing, the existing tap changer lever has a long overall dimension, is prone to poor stability during operation, and is difficult to control.

[0006] In order to solve the above technical problems, the present invention provides the following technical solution, namely a tap changer for an off-load transformer, including a mounting unit, a tap changer unit and a positioning unit.

[0007] Here, the mounting unit includes a mounting rod, the tap changing unit includes an adjustment assembly provided on the mounting rod, a tap changing lever provided on the adjustment assembly, and a tap changing clamp assembly provided at one end of the tap changing lever and provided on the mounting rod, and the positioning unit includes a mounting rod connecting assembly provided on the adjustment assembly, a positioning assembly provided on the mounting rod connecting assembly, and a traction assembly provided on the positioning assembly.

[0008] As a preferred embodiment of the tap changer for an off-load transformer according to the present invention, the adjustment assembly includes a tap changer lever adjustment part provided on the mounting rod, a linkage part provided on the tap changer lever adjustment part, and a spanner provided on the linkage part.

[0009] As a preferred embodiment of the tap changer for an off-load transformer described in the present invention, the tap change lever adjustment part includes a threaded rod provided on the mounting rod, an adjustment seat slidably provided on the threaded rod, and an adjustment knob rotatably provided on the adjustment seat and screw-connected to the threaded rod.

[0010] As a preferred embodiment of the tap changer for an off-load transformer according to the present invention, the interlocking portion includes a spanner pivot seat provided on the adjusting seat, a spanner pivot shaft rotatably provided on the spanner pivot seat and rotatably connected to the tap change lever, and a stopper provided on the adjusting seat, The wrench is provided on the wrench pivot shaft.

[0011] As a preferred embodiment of the tap changer for an off-load transformer according to the present invention, the mounting rod connection assembly includes a positioning seat and a catch provided on the positioning seat and removably connected to the mounting rod, The positioning assembly includes a fixed clamp plate provided on the positioning seat and a sliding clamp plate portion provided on the positioning seat, and the sliding clamp plate portion includes a guide bar provided on the positioning seat, a sliding seat slidably provided on the guide bar, a sliding clamp plate provided on the sliding seat, and a first spring provided on the guide bar.

[0012] As a preferred embodiment of the tap changer for an off-load transformer according to the present invention, the traction assembly includes a traction rope mounting seat provided on the sliding seat, a traction rope guide seat provided on the positioning seat, a take-up roller part provided on the adjustment assembly, and a traction rope, one end of which is provided on the traction rope mounting seat, slidably provided on the traction rope guide seat, and the other end of which is provided on the take-up roller part; The take-up roller unit includes a take-up roller rotatably mounted on the adjustment assembly, and a handle mounted on the take-up roller.

[0013] As a preferred embodiment of the tap changer for an off-load transformer according to the present invention, the mounting rod is provided with a pivotable connection seat, and the tap changer clamp assembly includes: a tap position clamp seat provided on the pivotable connection seat; a first clamp plate provided on the tap position clamp seat; and a second clamp plate provided on the tap position clamp seat; The second clamp plate includes a pivotable connecting shaft pivotally connected to the tap switch lever, a connecting rod provided on the pivotable connecting shaft, and a pivotable clamp plate provided on the connecting rod and pivotally connected to the tap position clamp seat.

[0014] As a preferred embodiment of the tap changer for an off-load transformer according to the present invention, the tap changer further includes a counterweight unit, the counterweight unit including a counterweight mounting assembly provided on the mounting rod, a counterweight member provided on the counterweight mounting assembly, and a mounting rod engagement assembly provided on the counterweight mounting assembly, the counterweight mounting assembly including a counterweight seat slidably provided on the mounting rod and a limit seat provided on the counterweight seat, the limit seat being provided with a limit groove, and the cowl The counterweight member includes a counterweight block and a limit rod provided on the counterweight block and corresponding to the limit groove, the mounting rod having a slide groove and an insertion hole, the mounting rod engagement assembly includes a slide rod provided on the counterweight seat and corresponding to the slide groove, and a limit member provided on the slide rod, the limit member includes an insertion bar slidably provided on the slide rod and corresponding to the insertion hole, and a second spring provided on the insertion bar.

[0015] As a preferred embodiment of the tap changer for an off-load transformer described in the present invention, the tap changer further includes a protection unit, the protection unit including a protection cover mounting portion provided on the mounting rod, a protection cover connection portion provided on the protection cover mounting portion, and a protection cover portion provided on the protection cover connection portion, the protection cover mounting portion including a protection cover mounting seat provided on the mounting rod, and a tap change lever protection cover provided on the protection cover mounting seat and corresponding to the tap change lever, the protection cover connection portion including a protection cover catch provided on the protection cover mounting seat and a protection cover snap ring provided on the protection cover catch, the protection cover portion including a lower protection cover provided on the protection cover snap ring and an upper protection cover provided on the lower protection cover, and the tap change clamp assembly is located within the protection cover portion.

[0016] The beneficial effects of the present invention are as follows: By providing the adjustment assembly on the mounting rod, the tap changer clamp assembly can be controlled to open and close by the tap changer lever, and the tap position on the no-load transformer can be easily adjusted; Since the adjustment assembly is slidably provided on the mounting rod and the position of the adjustment assembly can be fixed by the traction assembly, the center of gravity position of the adjustment assembly relative to the mounting rod can be effectively adjusted, so that the entire apparatus can be easily stabilized when the operator operates the tap changer apparatus, and the stability and accuracy of the operation can be improved; By providing the positioning unit, the stability of the entire apparatus during tap changing is improved, and the operator can easily control the apparatus.

[0017] The present invention has been proposed in view of the above-mentioned problems in the method of using the existing tap changer for an unloaded transformer.

[0018] Therefore, the present invention provides a method for using a tap changer for an unloaded transformer, the purpose of which is to solve the problems of directly adjusting the voltage tap position of the unloaded transformer in the conventional method for using a tap changer lever, which requires a long overall dimension of the operating lever, is prone to poor stability during operation, and is difficult to control.

[0019] In order to solve the above technical problems, the present invention provides the following technical solution, namely, a method for using a tap changer for an unloaded transformer, Fixing the entire mounting rod under the unloaded transformer to be tapped using a positioning unit, clamping a positioning reference of the device using a fixed clamp plate and a sliding clamp plate, and positioning the tap-changing clamp assembly on the voltage adjustment switch of the unloaded transformer, thereby positioning the device; Using the adjustment knob to slide the adjustment seat on the threaded rod, the position of the adjustment seat relative to the mounting rod is changed, and the adjustment seat is positioned at a position where the operator can easily operate the adjustment seat, thereby positioning the adjustment seat; The counterweight seat is slid on the mounting rod using the slide rod, and when the counterweight seat reaches a stable position where it is easy to apply force to the adjustment seat, the insertion bar is inserted into the insertion hole, thereby adjusting the counterweight; using a spanner to move the tap change lever to one side of the mounting rod to rotate the second clamp plate relative to the first clamp plate so that the first clamp plate and the second clamp plate clamp the voltage regulating switch of the off-load transformer, thereby controlling the tap change clamp; Using a traction assembly on one end of the mounting rod to change the position of the adjustment assembly relative to the mounting rod and using an adjustment knob to adjust the position of the adjustment seat to toggle a voltage adjustment switch of the no-load transformer on the first clamp plate and the second clamp plate to enable remote voltage adjustment of the no-load transformer, thereby controlling the mounting rod.

[0020] The beneficial effects of the present invention are as follows: When an operator adjusts the voltage tap position of the unloaded transformer by the mounting rod, the operator can use the adjustment assembly to realize the opening and closing control of the tap changer clamp assembly by the tap changer lever, and can easily adjust the tap position on the unloaded transformer; Since the adjustment assembly is slidably mounted on the mounting rod and the position of the adjustment assembly can be fixed by the traction assembly, the center of gravity position of the adjustment assembly relative to the mounting rod can be effectively adjusted, so that the entire apparatus can be easily stabilized when the operator operates the tap changer device, and the stability and accuracy of the operation can be improved; The positioning unit is provided to improve the stability of the entire apparatus during tap changing, and to facilitate the operator's control over the apparatus. [Brief description of the drawings]

[0021] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments. It should be understood that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a schematic diagram showing the overall structure of a tap changer for an unloaded transformer according to the present invention; [Diagram 2] 2 is a schematic diagram showing the overall structure of the tap changer for an unloaded transformer according to the present invention; FIG. [Diagram 3] FIG. 2 is a schematic diagram showing the structure of an adjusting assembly and a positioning assembly of the tap changer for an off-load transformer according to the present invention; [Figure 4] FIG. 2 is an exploded view showing the adjustment and positioning assemblies of the tap changer for an off-load transformer according to the present invention; [Diagram 5] FIG. 2 is a schematic diagram showing the structure of a tap changer clamp assembly of the tap changer for an off-load transformer according to the present invention; [Figure 6] FIG. 2 is an exploded view showing a counterweight unit of the tap changer for an unloaded transformer according to the present invention. [Figure 7] FIG. 11 is a schematic diagram showing the structure of a tap changer for an unloaded transformer according to a third embodiment of the present invention. [Figure 8] FIG. 2 is a schematic diagram showing the structure of a protection unit of the tap changer for an unloaded transformer according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order to make the above objectives, features and advantages of the present invention clearer and easier to understand, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings of the specification.

[0023] In order to facilitate a thorough understanding of the present invention, numerous specific details are set forth below; however, the present invention may be embodied in other ways than those described herein, and similar extensions may be made by those skilled in the art without departing from the spirit of the present invention, and therefore the present invention is not limited by the specific examples disclosed below.

[0024] Also, as used herein, "one embodiment" or "embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one embodiment of the present invention. The appearances of the phrase "in one embodiment" in different places in this specification are not all referring to the same embodiment, nor are they mutually exclusive embodiments separate or in the alternative from other embodiments.

[0025] Furthermore, the present invention will be described in detail in conjunction with schematic diagrams, and in order to facilitate the description when describing the embodiments of the present invention, the cross-sectional views showing the structure of the device are partially enlarged and not scaled, and the schematic diagrams are merely illustrative and do not limit the scope of protection of the present invention, and should include the three-dimensional spatial dimensions of length, width and depth during actual production.

[0026] 1 to 5 , embodiment 1 is a first embodiment of the present invention, which provides a tap changer for an unloaded transformer, and the tap changer for an unloaded transformer includes a mounting unit 100, a tap changing unit 200 and a positioning unit 300.

[0027] Here, the mounting unit 100 includes a mounting rod 101, and the tap changing unit 200 includes an adjustment assembly 203 mounted on the mounting rod 101, a tap changer lever 201 mounted on the adjustment assembly 203, and a tap changer clamp assembly 202 mounted on one end of the tap changer lever 201 and mounted on the mounting rod 101. The adjustment assembly 203 serves to position the control assembly of the tap changer clamp, so that the portion of the adjustment assembly 203 for connecting the tap changer clamp assembly 202 and the voltage regulating switch of the off-load transformer is located in a position that can be easily operated by an operator.

[0028] The positioning unit 300 includes a mounting rod connection assembly 301 mounted on the adjustment assembly 203, a positioning assembly 302 mounted on the mounting rod connection assembly 301, and a traction assembly 303 mounted on the positioning assembly 302. The positioning unit 300 plays a decorative and positioning role, and is used to fix the entire mounting rod 101 below the off-load transformer to be tap-changed, and clamp the positioning reference of the device so that the tap-changing clamp assembly 202 is located on the voltage adjustment switch of the off-load transformer.

[0029] Further, the adjustment assembly 203 includes a tap changer lever adjustment portion 203a provided on the mounting rod 101, an interlocking portion 203b provided on the tap changer lever adjustment portion 203a, and a spanner 203c provided on the interlocking portion 203b. The tap changer clamp assembly 202 can be controlled by controlling the interlocking portion 203b with the spanner 203c. As shown in FIG. 1, the tap changer clamp assembly 202 is closed to easily adjust the voltage adjustment switch of the no-load transformer, and as shown in FIG. 2, the tap changer clamp assembly 202 is open to easily clamp the voltage adjustment switch of the no-load transformer.

[0030] Furthermore, the tap change lever adjustment part 203a includes a threaded rod 203a-1 provided on the mounting rod 101, an adjustment seat 203a-2 slidably provided on the threaded rod 203a-1, and an adjustment knob 203a-3 rotatably provided on the adjustment seat 203a-2 and screw-connected to the threaded rod 203a-1. By sliding the adjustment seat 203a-2 on the threaded rod 203a-1 using the adjustment knob 203a-3, the position of the adjustment seat 203a-2 relative to the mounting rod 101 is changed, and the adjustment seat 203a-2 is positioned so that it can be easily operated by an operator.

[0031] Further, the interlocking part 203b includes a spanner pivot seat 203b-1 provided on the adjustment seat 203a-2, a spanner pivot shaft 203b-2 pivotally provided on the spanner pivot seat 203b-1 and pivotally connected to the tap change lever 201, and a stopper 203b-3 provided on the adjustment seat 203a-2. The spanner 203c is provided on the spanner pivot shaft 203b-2. By using the spanner 203c to move the tap change lever 201 to one side of the mounting rod 101, the second clamp plate 202c is pivoted relative to the first clamp plate 202b, so that the first clamp plate 202b and the second clamp plate 202c clamp the voltage adjustment switch of the no-load transformer.

[0032] Furthermore, the mounting rod connection assembly 301 includes a positioning seat 301 a and a catch 301 b provided on the positioning seat 301 a and removably connected to the mounting rod 101 .

[0033] Preferably, the positioning assembly 302 includes a fixed clamp plate 302a provided on the positioning seat 301a, and a sliding clamp plate portion 302b provided on the positioning seat 301a, and the sliding clamp plate portion 302b includes a guide bar 302b-2 provided on the positioning seat 301a, a sliding seat 302b-3 slidably provided on the guide bar 302b-2, a sliding clamp plate 302b-1 provided on the sliding seat 302b-3, and a first spring 302b-4 provided on the guide bar 302b-2.

[0034] Furthermore, the traction assembly 303 includes a traction rope mounting seat 303d provided on the sliding seat 302b-3, a traction rope guide seat 303b provided on the positioning seat 301a, a winding roller section 303c provided on the adjustment assembly 203, and a traction rope 303a, one end of which is provided on the traction rope mounting seat 303d and slidably provided on the traction rope guide seat 303b, and the other end of which is provided on the winding roller section 303c, and the winding roller section 303c includes a winding roller 303c-1 rotatably provided on the adjustment assembly 203, and a handle 303c-2 provided on the winding roller 303c-1. By providing the towing assembly 303, the adjustment assembly 203 can be positioned using the positioning unit 300, and the stability of the positioning unit 300, which is removably mounted on the mounting rod 101, can be improved relative to the adjustment assembly 203. Furthermore, by rotating the handle 303c-2, the towing rope 303a can also be rotated on the winding roller 303c-1, thereby making it possible to flexibly adjust the relative positional relationship between the positioning unit 300 and the adjustment assembly 203.

[0035] Furthermore, the mounting rod 101 is provided with a rotating connection seat 101a, and the tap change clamp assembly 202 includes a tap position clamp seat 202a provided on the rotating connection seat 101a, a first clamp plate 202b provided on the tap position clamp seat 202a, and a second clamp plate 202c provided on the tap position clamp seat 202a.

[0036] Preferably, the second clamp plate 202c includes a pivotable connecting shaft 202c-2 pivotally connected to the tap switch lever 201, a connecting rod 202c-3 provided on the pivotable connecting shaft 202c-2, and a pivotable clamp plate 202c-1 provided on the connecting rod 202c-3 and pivotally connected to the tap position clamp seat 202a.

[0037] In use, the positioning unit 300 is used to fix the entire mounting rod 101 under the unloaded transformer to be tap-changed, and the fixed clamp plate 302a and the sliding clamp plate 302b-1 are used to clamp the positioning reference of the device, positioning the tap-change clamp assembly 202 on the voltage adjustment switch of the unloaded transformer, thereby positioning the device; the adjustment knob 203a-3 is used to slide the adjustment seat 203a-2 on the threaded rod 203a-1 to change the position of the adjustment seat 203a-2 relative to the mounting rod 101, positioning the adjustment seat 203a-2 in a position where it can be easily operated by an operator, thereby positioning the adjustment seat; the spanner 203c is used to move the tap-change lever 201 to one side of the mounting rod 101, thereby positioning the first clamp. the second clamp plate 202c is rotated relative to the mounting rod 101 so that the first clamp plate 202b and the second clamp plate 202c clamp the voltage adjusting switch of the no-load transformer, thereby controlling the tap-changing clamp; the traction assembly 303 at one end of the mounting rod 101 is used to change the position of the adjusting assembly 203 relative to the mounting rod 101, and the adjustment knob 203a-3 is used to adjust the position of the adjusting seat 203a-2, thereby switching the voltage adjusting switch of the no-load transformer on the first clamp plate 202b and the second clamp plate 202c to enable remote voltage adjustment of the no-load transformer, thereby controlling the mounting rod 101, and effectively improving the operation stability and ease of use of the entire device.

[0038] 1 to 6, the second embodiment of the present invention is different from the first embodiment in that it further includes a counterweight unit 400, the counterweight unit 400 includes a counterweight mounting assembly 401 mounted on the mounting rod 101, a counterweight member 402 mounted on the counterweight mounting assembly 401, and a mounting rod engagement assembly 403 mounted on the counterweight mounting assembly 401, the counterweight mounting assembly 401 is adjustably mounted on the mounting rod 101 via the mounting rod engagement assembly 403, thereby expanding the adjustment range of the center of gravity of the mounting rod 101 by the counterweight member 402, and improving the stability of the work of the mounting rod 101 in different situations. When the working distance of the mounting rod 101 is far, the counterweight unit 400 is mounted toward the middle part of the mounting rod 101, thereby improving the stability of the entire mounting rod 101, and conversely, the counterweight unit 400 is mounted toward the direction of the adjustment assembly 203, thereby improving the stability of the adjustment assembly 203.

[0039] Compared with the first embodiment, the counterweight mounting assembly 401 further includes a counterweight seat 401a slidably mounted on the mounting rod 101 and a limit seat 401b mounted on the counterweight seat 401a, and the limit seat 401b is provided with a limit groove 401b-1. By providing the limit seat 401b, the counterweight block 402a can be easily mounted at different directional angles of the counterweight seat 401a. Preferably, the counterweight member 402 includes a counterweight block 402a and a limit rod 402b provided on the counterweight block 402a and corresponding to the limit groove 401b-1, and the counterweight block 402a is detachably mounted on the limit seat 401b of the counterweight seat 401a via the limit rod 402b, thereby making it possible to easily adjust the center of gravity of the mounting rod 101 and effectively improve the working stability of the mounting rod 101.

[0040] Preferably, the mounting rod 101 is provided with a slide groove 101b, the slide groove 101b is provided with an insertion hole 101c, the mounting rod engagement assembly 403 includes a slide rod 403a provided in the counterweight seat 401a and corresponding to the slide groove 101b, and a limit member 403b provided on the slide rod 403a, the limit member 403b includes an insertion bar 403b-1 slidably provided on the slide rod 403a and corresponding to the insertion hole 101c, and a second spring 403b-2 provided on the insertion bar 403b-1. The second spring 403b-2 allows the insertion bar 403b-1 to be inserted into the insertion hole 101c under the action of an elastic restoring force, thereby realizing the positioning of the slide rod 403a and the counterweight seat 401a in the mounting rod 101.

[0041] In use, the positioning unit 300 is used to fix the entire mounting rod 101 under the unloaded transformer to be tapped, and the fixed clamp plate 302a and the sliding clamp plate 302b-1 are used to clamp the positioning reference of the device, and the tap-changing clamp assembly 202 is positioned on the voltage adjustment switch of the unloaded transformer, thereby positioning the device; the adjustment knob 203a-3 is used to slide the adjustment seat 203a-2 on the threaded rod 203a-1 to change the position of the adjustment seat 203a-2 relative to the mounting rod 101, and the adjustment seat 203a-2 is positioned in a position that can be easily operated by an operator, thereby positioning the adjustment seat; the slide rod 403a is used to slide the counterweight seat 401a on the mounting rod 101, and when the counterweight seat 401a reaches a stable position where it is easy to apply force to the adjustment seat 203a-2, the plug-in bar 403b-1 is plugged in. 2. Insert the adjusting assembly 203 into the hole 101c, thereby adjusting the counterweight; move the tap change lever 201 to one side of the mounting rod 101 using the spanner 203c, thereby rotating the second clamp plate 202c relative to the first clamp plate 202b, so that the first clamp plate 202b and the second clamp plate 202c clamp the no-load transformer voltage adjustment switch, thereby controlling the tap change clamp; change the position of the adjusting assembly 203 relative to the mounting rod 101 using the traction assembly 303 and adjust the position of the adjusting seat 203a-2 using the adjustment knob 203a-3 to switch the no-load transformer voltage adjustment switch on the first clamp plate 202b and the second clamp plate 202c to enable remote voltage adjustment of the no-load transformer, thereby controlling the mounting rod 101.

[0042] The other structure is similar to that of the first embodiment.

[0043] 1 to 8, Example 3 is a third embodiment of the present invention, and differs from Example 2 in that it further includes a protective unit 500, and the protective unit 500 includes a protective cover mounting portion 501 provided on the mounting rod 101, a protective cover connection portion 503 provided on the protective cover mounting portion 501, and a protective cover portion 502 provided on the protective cover connection portion 503.

[0044] Compared to Example 2, protective cover mounting part 501 further includes protective cover mounting seat 501a provided on mounting rod 101, and tap changer lever protective cover 501b provided on protective cover mounting seat 501a and corresponding to tap changer lever 201. Providing protective cover mounting part 501 facilitates mounting protective cover part 502, which protects the insulating coating on the surfaces of first clamp plate 202b and second clamp plate 202c, to mounting rod 101. Therefore, when this device is not in use, tap changer clamp assembly 203 can be protected.

[0045] Preferably, the protective cover connection part 503 includes a protective cover catch 503a provided on the protective cover mounting seat 501a and a protective cover snap ring 503b provided on the protective cover catch 503a, and the protective cover part 502 is removably connected to the protective cover mounting seat 501a via the protective cover snap ring 503b, making it easy to replace the protective cover part 502 with one of a different shape depending on the dimensions of the tap changing clamp assembly 202.

[0046] Preferably, the protective cover part 502 includes a lower protective cover 502a provided on the protective cover snap ring 503b and an upper protective cover 502b provided on the lower protective cover 502a, and the upper protective cover 502b and the lower protective cover 502a can protect the insulating coating on the surfaces of the first clamp plate 202b and the second clamp plate 202c. The tap-changing clamp assembly 202 is located within the protective cover part 502.

[0047] In use, the positioning unit 300 is used to fix the entire mounting rod 101 under the unloaded transformer to be tapped, and the fixed clamp plate 302a and the sliding clamp plate 302b-1 are used to clamp the positioning reference of the device, and the tap-changing clamp assembly 202 is positioned on the voltage adjustment switch of the unloaded transformer, thereby positioning the device; the adjustment knob 203a-3 is used to slide the adjustment seat 203a-2 on the threaded rod 203a-1 to change the position of the adjustment seat 203a-2 relative to the mounting rod 101, and the adjustment seat 203a-2 is positioned in a position that can be easily operated by an operator, thereby positioning the adjustment seat; the slide rod 403a is used to slide the counterweight seat 401a on the mounting rod 101, and when the counterweight seat 401a reaches a stable position where it is easy to apply force to the adjustment seat 203a-2, the plug-in bar 403b-1 is plugged in. 2. Insert the adjusting assembly 203 into the hole 101c, thereby adjusting the counterweight; move the tap change lever 201 to one side of the mounting rod 101 using the spanner 203c, thereby rotating the second clamp plate 202c relative to the first clamp plate 202b, so that the first clamp plate 202b and the second clamp plate 202c clamp the no-load transformer voltage adjustment switch, thereby controlling the tap change clamp; change the position of the adjusting assembly 203 relative to the mounting rod 101 using the traction assembly 303 and adjust the position of the adjusting seat 203a-2 using the adjustment knob 203a-3 to switch the no-load transformer voltage adjustment switch on the first clamp plate 202b and the second clamp plate 202c to enable remote voltage adjustment of the no-load transformer, thereby controlling the mounting rod 101. When the device is not in use, the protection unit 500 can be used to protect the tap changing clamp, thereby protecting the insulating coating on the surfaces of the first clamp plate 202b and the second clamp plate 202c, and effectively improving the service life of the present invention.

[0048] The other structure is similar to that of the second embodiment.

[0049] Example 4 is a method of using the tap changer for an unloaded transformer based on Examples 1 to 3, Fixing the entire mounting rod 101 under the off-load transformer to be tapped using the positioning unit 300, clamping the positioning reference of the device using the fixed clamp plate 302a and the sliding clamp plate 302b-1, and positioning the tap-changing clamp assembly 202 at the voltage adjustment switch of the off-load transformer, thereby positioning the device; By sliding the adjustment seat 203a-2 on the threaded rod 203a-1 using the adjustment knob 203a-3, the position of the adjustment seat 203a-2 relative to the mounting rod 101 is changed, and the adjustment seat 203a-2 is positioned at a position where an operator can easily operate it, thereby positioning the adjustment seat; The counterweight seat 401a is slid on the mounting rod 101 using the slide rod 403a, and when the counterweight seat 401a reaches a stable position where it is easy to apply force to the adjustment seat 203a-2, the insertion bar 403b-1 is inserted into the insertion hole 101c, thereby adjusting the counterweight; using the spanner 203c to move the tap change lever 201 to one side of the mounting rod 101 to rotate the second clamp plate 202c relative to the first clamp plate 202b, so that the first clamp plate 202b and the second clamp plate 202c clamp the voltage adjustment switch of the off-load transformer, thereby controlling the tap change clamp; Using a traction assembly 303 on one end of the mounting rod 101 to change the position of the adjustment assembly 203 relative to the mounting rod 101 and using an adjustment knob 203a-3 to adjust the position of the adjustment seat 203a-2 to toggle a voltage adjustment switch of the no-load transformer on the first clamp plate 202b and the second clamp plate 202c to enable remote voltage adjustment of the no-load transformer, thereby controlling the mounting rod 101.

[0050] It should be noted that the structure and arrangement of the present application shown in several different exemplary embodiments are merely exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily apparent to those who refer to this disclosure that many modifications (e.g., changes in dimensions, scales, structures, shapes and proportions of various elements, parameter values ​​such as temperature and pressure, mounting arrangements, use of materials, colors, orientations, etc.) are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be composed of multiple parts or elements, the position of elements may be reversed or otherwise changed, and the nature, number or position of separate elements may be changed. Accordingly, all such modifications are intended to be within the scope of the present invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "apparatus + function" clause is intended to cover structures performing the functions described herein, and is intended to be equivalent structures as well as structural equivalents. Other substitutions, variations, modifications and omissions may be made in the design, operating conditions and arrangements of the exemplary embodiments without departing from the scope of the present invention. Therefore, it is intended that the present invention not be limited to a particular embodiment, but extend to various modifications that fall within the scope of the appended claims.

[0051] Moreover, in order to provide a concise description of example embodiments, it is not necessary to describe all features of an actual embodiment (i.e., features that are not relevant to the best mode currently contemplated for carrying out the invention or that are not relevant to the implementation of the invention).

[0052] It should be noted that the above-mentioned embodiments are merely for illustrating the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art may make modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or substitutions should be included in the scope of the claims of the present invention.

Claims

1. A mounting unit (100) including a mounting rod (101); a tap changing unit (200) including an adjustment assembly (203) mounted on the mounting rod (101), a tap change lever (201) mounted on the adjustment assembly (203), and a tap change clamp assembly (202) mounted on one end of the tap change lever (201) and on the mounting rod (101); a positioning unit (300) including: a mounting rod connection assembly (301) mounted on the adjustment assembly (203); a positioning assembly (302) mounted on the mounting rod connection assembly (301); and a traction assembly (303) mounted on the positioning assembly (302).

2. 2. The tap changer for an off-load transformer according to claim 1, characterized in that the adjustment assembly (203) includes a tap changer lever adjustment portion (203a) provided on the mounting rod (101), a linkage portion (203b) provided on the tap changer lever adjustment portion (203a), and a spanner (203c) provided on the linkage portion (203b).

3. The tap changer for an unloaded transformer according to claim 2, characterized in that the tap change lever adjustment portion (203a) includes a threaded rod (203a-1) provided on the mounting rod (101), an adjustment seat (203a-2) slidably provided on the threaded rod (203a-1), and an adjustment knob (203a-3) rotatably provided on the adjustment seat (203a-2) and screw-connected to the threaded rod (203a-1).

4. The interlocking portion (203b) includes a spanner pivot seat (203b-1) provided on the adjustment seat (203a-2), a spanner pivot shaft (203b-2) rotatably provided on the spanner pivot seat (203b-1) and rotatably connected to the tap changeover lever (201), and a stopper (203b-3) provided on the adjustment seat (203a-2), The tap changer for an unloaded transformer according to claim 3, characterized in that the spanner (203c) is provided on the spanner pivot shaft (203b-2).

5. The mounting rod connection assembly (301) includes a positioning seat (301a) and a catch (301b) provided in the positioning seat (301a) and removably connected to the mounting rod (101); The tap changer for an unloaded transformer according to any one of claims 1 to 4, characterized in that the positioning assembly (302) includes a fixed clamp plate (302a) provided on the positioning seat (301a) and a sliding clamp plate portion (302b) provided on the positioning seat (301a), and the sliding clamp plate portion (302b) includes a guide bar (302b-2) provided on the positioning seat (301a), a sliding seat (302b-3) slidably provided on the guide bar (302b-2), a sliding clamp plate (302b-1) provided on the sliding seat (302b-3), and a first spring (302b-4) provided on the guide bar (302b-2).

6. The traction assembly (303) includes a traction rope mounting seat (303d) provided on the sliding seat (302b-3), a traction rope guide seat (303b) provided on the positioning seat (301a), a take-up roller unit (303c) provided on the adjustment assembly (203), and a traction rope (303a) having one end provided on the traction rope mounting seat (303d), slidably provided on the traction rope guide seat (303b), and the other end provided on the take-up roller unit (303c); The tap changer for an off-load transformer according to claim 5, characterized in that the winding roller portion (303c) includes a winding roller (303c-1) rotatably mounted on the adjustment assembly (203) and a handle (303c-2) mounted on the winding roller (303c-1).

7. The mounting rod (101) is provided with a rotating connection seat (101a), and the tap change clamp assembly (202) includes a tap position clamp seat (202a) provided on the rotating connection seat (101a), a first clamp plate (202b) provided on the tap position clamp seat (202a), and a second clamp plate (202c) provided on the tap position clamp seat (202a); 7. The tap changer for an off-load transformer according to claim 6, characterized in that the second clamp plate (202c) includes a pivotable connecting shaft (202c-2) pivotally connected to the tap change lever (201), a connecting rod (202c-3) provided on the pivotable connecting shaft (202c-2), and a pivotable clamp plate (202c-1) provided on the connecting rod (202c-3) and pivotally connected to the tap position clamp seat (202a).

8. The present invention further includes a counterweight unit (400), the counterweight unit (400) including a counterweight mounting assembly (401) mounted on the mounting rod (101), a counterweight member (402) mounted on the counterweight mounting assembly (401), and a mounting rod engagement assembly (403) mounted on the counterweight mounting assembly (401), The counterweight mounting assembly (401) includes a counterweight seat (401a) slidably mounted on the mounting rod (101) and a limit seat (401b) provided on the counterweight seat (401a), and the limit seat (401b) is provided with a limit groove (401b-1); The counterweight member (402) includes a counterweight block (402a) and a limit rod (402b) provided in the counterweight block (402a) and corresponding to the limit groove (401b-1); 7. The tap changer for an unloaded transformer according to claim 6, characterized in that the mounting rod (101) is provided with a slide groove (101b), the slide groove (101b) is provided with an insertion hole (101c), the mounting rod engagement assembly (403) includes a slide rod (403a) provided on the counterweight seat (401a) and corresponding to the slide groove (101b), and a limit member (403b) provided on the slide rod (403a), the limit member (403b) includes an insertion bar (403b-1) slidably provided on the slide rod (403a) and corresponding to the insertion hole (101c), and a second spring (403b-2) provided on the insertion bar (403b-1).

9. The protective unit (500) further includes a protective cover mounting portion (501) provided on the mounting rod (101), a protective cover connection portion (503) provided on the protective cover mounting portion (501), and a protective cover portion (502) provided on the protective cover connection portion (503), The protective cover mounting portion (501) includes a protective cover mounting seat (501a) provided on the mounting rod (101), and a tap change lever protective cover (501b) provided on the protective cover mounting seat (501a) and corresponding to the tap change lever (201), The protective cover connection portion (503) includes a protective cover catch (503a) provided on the protective cover mounting seat (501a) and a protective cover snap ring (503b) provided on the protective cover catch (503a), The protective cover portion (502) includes a lower protective cover (502a) provided on the protective cover snap ring (503b) and an upper protective cover (502b) provided on the lower protective cover (502a), 9. The tap changer for an off-load transformer according to claim 8, characterized in that the tap changer clamp assembly (202) is located within the protective cover part (502).

10. Fixing the entire mounting rod (101) under the off-load transformer to be tapped using the positioning unit (300), clamping the positioning reference of the device using the fixed clamp plate (302a) and the sliding clamp plate (302b-1), and positioning the tap-changing clamp assembly (202) at the voltage adjustment switch of the off-load transformer, thereby positioning the device; Using the adjustment knob (203a-3) to slide the adjustment seat (203a-2) on the threaded rod (203a-1), the position of the adjustment seat (203a-2) relative to the mounting rod (101) is changed, and the adjustment seat (203a) is positioned at a position where an operator can easily operate it, thereby positioning the adjustment seat; Using the slide rod (403a), the counterweight seat (401a) is slid on the mounting rod (101), and when the counterweight seat (401a) reaches a stable position where it is easy to apply force to the adjustment seat (203a-2), the insertion bar (403b-1) is inserted into the insertion hole (101c), thereby adjusting the counterweight; using a spanner (203c) to move the tap change lever (201) to one side of the mounting rod (101) to rotate the second clamp plate (202c) relative to the first clamp plate (202b) so that the first clamp plate (202b) and the second clamp plate (202c) clamp the voltage regulating switch of the off-load transformer, thereby controlling the tap change clamp; 10. A method of using the tap changer for an unloaded transformer according to claim 9, characterized in that it comprises changing the position of the adjustment assembly (203) relative to the mounting rod (101) using a traction assembly (303) at one end of the mounting rod (101) and adjusting the position of the adjustment seat (203a) using the adjustment knob (203a-3) to switch the voltage adjustment switches of the unloaded transformer on the first clamping plate (202b) and the second clamping plate (202c) to enable remote voltage adjustment of the unloaded transformer, thereby controlling the mounting rod (101).

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