JP2012119397A - Stationary induction electrical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stationary induction electrical apparatus with increased competitiveness, which partially uses a box shaped winding tightening member instead of a conventional square type steel pipe so as to improve productivity and design performance while maintaining weight saving.SOLUTION: A winding tightening metal fitting 5 is used as a tightening member of a winding 2 instead of square type steel pipes 16 and 17. The winding tightening metal fitting 5 is configured combining: a vertical flat plate 5a on a yoke side provided on a yoke side 1b; a horizontal winding tightening plate 5b receiving tightening of the winding 2; and an L shaped reinforcement plate 5c with an L shaped cross section. The winding tightening metal fitting 5 has a plurality of coupling member receiving plates 5d. The coupling member receiving plate 15d connects upper and lower coupling members 7 and 8 and the winding tightening metal fitting 5.

Description

  The present invention relates to a winding fastening configuration of a static induction electric machine, and more particularly to a static induction electric machine using a square steel pipe as a winding fastening member.

  In general, static induction appliances such as power transformers are required to greatly reduce their transport dimensions and weight, and various techniques have been proposed. For example, in the disassembling and transporting transformer described in Patent Document 1, the leg iron into which the winding is inserted is divided at a substantially central portion in the width direction to form a B-shaped two-leg iron core unit, and the two R-shaped two-leg iron core units are provided. These are arranged side by side.

  Moreover, in patent document 1, an iron core is made into the unit of two or more U-shaped cores at the time of factory assembly and disassembly transport by removing a coil | winding and an upper yoke. According to such a technique, it is possible to significantly reduce the size and weight at the time of assembly and transportation of the iron core having the largest size and the heaviest weight among the components constituting the transformer.

  By the way, in recent years, the demand for static induction appliances has increased on a global scale, and a highly competitive product has been demanded. In particular, overseas markets are characterized by high transportation costs and high loss assessments. Accordingly, there is a need for a static induction machine that is lighter and has lower loss.

  In order to reduce the weight of static induction equipment and reduce loss, it is important not only to improve the main members such as the iron core and winding, but also to improve the tightening configuration of the iron core and winding. Taking the tightening configuration of the iron core and the winding in Patent Document 1 as an example, the yoke clamping member that clamps the yoke of the iron core has substantially the function of clamping the winding. For this reason, the width of the yoke fastening member is widened, and the mass of the fastening member is increased, which causes a mass increase in the transformer. In addition, since the width dimension of the yoke fastening member is increased, the loss due to the leakage magnetic flux from the windings flowing into the yoke fastening member has increased.

  Therefore, a technique for reducing the weight and reducing the loss by dividing the holding function of the yoke and the holding function of the winding and minimizing the width dimension of the yoke fastening member has been considered. Hereinafter, a stationary induction device in which a yoke fastening member and a winding fastening member are separately provided will be described in detail with reference to FIGS. FIG. 9 is a self-cooling type static induction appliance in the winding, and FIG. 13 is a static induction type static inductive cooling method in the winding.

  As shown in these drawings, the static induction electric appliance is composed of a laminated iron core 1 formed by laminating a plurality of electric iron plates and a winding 2 inserted into the laminated iron core 1. The laminated iron core 1 includes a plurality of leg irons 1a extending in the vertical direction and yokes 1b arranged above and below the leg irons 1a.

  The leg iron 1a is a part into which the winding 2 is inserted, and is sandwiched between leg iron fastening brackets 3 arranged on both end surfaces in the stacking direction, and fastened by a plurality of leg iron fastening bands (not shown). Integrated. Further, the yoke 1b is a portion for connecting a plurality of leg irons 1a, and is sandwiched between the yoke fasteners 4 having the same width as the minimum width of the yoke 1b, and a plurality of yoke fastening bands (not shown). To be integrated.

  In the static induction machine shown in FIGS. 9 and 10, square steel pipes 16 and 17 are used as fastening members for the winding 2. More specifically, the upper coil-clamping square steel pipe 16 is disposed horizontally on the upper side of the winding 2 so as to face each other, and the lower coil-clamping square steel pipe 17 is disposed on the lower side of the winding 2. And are arranged horizontally.

  The upper winding fastening square steel pipe 16 is connected to the upper end of the leg iron fastening fitting 3, and the lower winding fastening square steel pipe 17 is connected to the lower end of the leg iron fastening fitting 3. A spacer 6 is provided between the winding fastening square steel pipes 16 and 17 and the winding 2. By adjusting the gap between the winding-clamped square steel pipes 16 and 17 and the winding 2 by the spacer 6, the winding 2 is sandwiched.

  Further, a reinforcing plate is attached to the winding clamped square steel pipes 16 and 17 as a countermeasure against a load generated in the square steel pipe by suspension or winding tightening. Specifically, a plurality of upper connecting members 7 extending perpendicular to the longitudinal direction of the square steel pipe 16 are arranged above the upper winding fastening square steel pipe 16, and the upper winding fastening is performed by the upper connecting member 7. Square steel pipes 16 are connected to each other.

  On the other hand, a plurality of lower connecting members 8 extending perpendicularly to the longitudinal direction of the square steel pipe 17 are arranged below the lower winding fastening square steel pipe 17, and the lower winding fastening square steel pipe is formed by the lower connecting member 8. 17 are connected. By using such connecting members 7 and 8 as reinforcing plates, rotational force (reaction force when the winding 2 is clamped) generated in the winding clamped square steel pipes 16 and 17 and in the vertical direction during transportation The shake can be suppressed.

  Further, by providing the connecting members 7 and 8, the contents structure of the stationary induction device composed of the laminated iron core 1, the winding 2, and the clamping member that holds them can be more reliably integrated. It becomes possible. A hanging ear 9 is attached to the side surface of the upper winding fastening square steel pipe 16 on the laminated core 1 side.

  Subsequently, a winding tightening configuration in the static induction electric appliance of the in-winding forced cooling method will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the same member as the stationary induction | guidance | derivation induction machine shown in FIG. 9, and description is abbreviate | omitted. The inductive static cooling type static induction appliance is housed in the tank 10, and a cooling pipe 11 serving as a flow path for the cooling medium (arrow in the figure) is arranged from the outside of the tank 10 to the lower part of the tank 10. ing.

  The cooling pipe 11 is connected to a lower winding fastening square steel pipe 17. Further, a hole 17 a for allowing the cooling medium to flow upward from the lower winding clamping square steel pipe 17 is formed in the upper surface portion of the lower winding clamping square steel pipe 17. A through hole 6 a is formed in the spacer 6 inserted between the winding 2 and the lower winding clamping square steel pipe 17 at a position corresponding to the hole 17 a on the upper surface of the lower winding clamping square steel pipe 17. Has been. The cooling medium flowing through the cooling pipe 11 passes through the holes 17a and the through holes 6a and flows into the winding 2 side.

  As described above, the stationary induction electric appliances of FIGS. 9 and 10 employ the winding-tightened square steel pipes 16 and 17 as the dedicated members for sandwiching the winding 2, and the joint for sandwiching the yoke 1b. The iron fastener 4 does not sandwich the winding 2. Therefore, the width dimension of the yoke fastener 4 can be minimized. Thereby, it can contribute to weight reduction and loss reduction of the yoke fastener 4. FIG.

Japanese Patent Application No. 6-176931

  However, the static induction appliance using the square steel pipes 16 and 17 as the winding fastening members has the following problems. That is, the standard steel square tubes are used for the winding fastening square steel tubes 16 and 17, but the standard tolerances are larger than the required tolerances for the production of static induction devices. Is big.

  For this reason, it is indispensable to perform mechanical correction at the time of carrying in the material of the square steel pipe which is a standard specification material. However, since the square steel pipe has low plasticity, mechanical correction is difficult, and the work time required for mechanical correction is long. Therefore, the mechanical correction process increases the production time.

  Further, in the winding clamped square steel pipes 16 and 17, the surface holding the winding 2 via the spacer 6 and the surface to which the hanging ear 9 is attached may have higher strength than the other surfaces. Have been forced. For this reason, there is a significant difference in strength required for each surface of the square steel pipe. Accordingly, if a square steel pipe having a thickness that satisfies the higher strength is used, the square steel pipe has a mass that is the same as the thickness of all four surfaces.

  Therefore, it is conceivable to use a square steel pipe having a thin plate thickness in order to suppress the mass of the coil fastening square steel pipes 16 and 17, but in this case, a high strength such as the clamping surface of the winding 2 is required. Reinforcing plates became indispensable for the parts. As a result, not only does the weight increase due to the attachment of the reinforcing plate, but also there is a possibility that the winding fastening square steel pipes 16 and 17 may be distorted by welding when the reinforcing plate is attached. If such a distortion correction operation is performed, the production time of the static induction device will be further prolonged.

  Further, it is necessary to attach a reinforcing plate to the winding fastening square steel pipes 16 and 17 in the following cases. That is, the outer height of the winding fastening square steel pipes 16 and 17 is the center height of the yoke 1b on the winding 2 side in order to reduce stray loss. On the other hand, since the upper connecting member 7 or the lower connecting member 8 is connected on the opposite side of the winding 2, the position of the maximum width of the yoke 1 b becomes the outer height of the winding fastening square steel pipes 16 and 17.

  That is, the external height required for the winding fastening square steel pipes 16 and 17 varies depending on the size of the yoke 1b. However, the square steel pipe, which is a standard material, has a model and an external dimension. For this reason, it is necessary to adjust the outer dimensions of the coil fastening square steel pipes 16 and 17 according to the size of the yoke 1b, and a reinforcing plate must be attached to the coil fastening square steel pipes 16 and 17. did not become. The reinforcing plate attached in such a case also causes an increase in the mass of the winding fastening square steel pipes 16 and 17 and an increase in welding distortion.

  In addition, when there is no appropriate square steel pipe type having a desired rigidity, winding-clamped square steel pipes 16 and 17 having a width larger than the desired rigidity are used. That is, from the viewpoint of safety, the square steel pipes 16 and 17 are forced to be large, and it is difficult to secure a necessary insulation distance for the insulation of the content wiring in the static induction appliance. Therefore, when designing the content wiring, there arises a problem that the difficulty of design increases.

  Furthermore, when high rigidity is required for the winding-clamped square steel pipes 16 and 17, there is a possibility that the design itself cannot be performed without a standard square steel pipe having the required rigidity. As described above, when a square steel pipe is used as a winding fastening member in order to realize a lightweight static induction machine with low loss, the manufacturing time is long in the conventional technology, and the degree of freedom in design is low. Was an issue.

  The present invention has been made in response to such a conventional situation, and by using a winding fastening member partially having a box shape in place of the conventional square steel pipe, the weight reduction is maintained. An object of the present invention is to provide a static induction electric appliance that can improve manufacturability and designability and thereby enhance product competitiveness.

  A leg iron composed of a laminated iron core in which a plurality of electric iron plates are laminated, an upper yoke, and a lower yoke are provided, a winding is wound around the leg iron, and the leg iron is attached to a leg iron fastening bracket and a plurality of leg irons. The upper winding fasteners are arranged on both side surfaces of the upper yoke in parallel with the longitudinal direction of the yoke, and are integrated on both side surfaces of the lower yoke with the longitudinal direction of the yoke. In the static induction electric machine having a structure in which the lower winding fastening metal fitting is arranged and the winding is fastened by the upper and lower winding fastening metal fittings, the yoke is arranged in parallel in the stacking direction, and The width dimension is held by a yoke fastener having the same size as the minimum width of the yoke, and the yoke and the yoke fastener are integrated together by tightening together the yoke with a plurality of yoke fastening bunts, At least one of the upper and lower winding clamps is located on the yoke side. A yoke-side flat plate and a winding fastening plate that receives the tightening of the winding, and the winding fastening plate is attached to the winding side of the yoke-side flat plate to form an L shape, The upper winding fastening bracket and the lower winding fastening bracket have a configuration in which an L-shaped reinforcing plate is attached to a position for receiving tightening from the winding and a position for mounting the lifting bracket, and the upper winding fastening bracket and the lower winding fastening bracket are provided. Are connected by the leg iron clamps to sandwich the windings, the lower coil clamps are connected by a lower connection member, and the upper coil clamps are connected by an upper connection member. It is characterized by.

  According to the static induction machine of the present invention, a flat plate and a winding clamping plate are combined in an L shape, and an L-shaped reinforcing plate is attached only at a position where the winding is tightened and at a suspended position, and is partially box-shaped. By adopting the above-mentioned winding clamps, the windings can be securely clamped with clamps that have a mass or weight reduced to the same level as before, and square steel pipes should not be used. It is possible to reduce the work time by omitting mechanical correction, and furthermore, it is possible to design with free dimensions without being affected by the restrictions of the type of square steel pipe, improving the manufacturability and design, and improving the product It can contribute to strengthening competitiveness.

It is a figure which shows the coil | winding fastening structure of 1st Embodiment (self-cooling system in a coil | winding) based on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the winding clamp | tightening structure of the modified example (forced cooling system in a coil | winding) of 1st Embodiment, Comprising: (A) is a front view, (B) is a side view. The principal part perspective view of 1st Embodiment. It is a figure which shows the winding clamp | tightening structure of 2nd Embodiment which concerns on this invention, Comprising: (A) is a side view, (B) is principal part sectional drawing. It is a figure which shows the winding clamp | tightening structure of 3rd Embodiment which concerns on this invention, Comprising: (A) is a side view, (B) is principal part sectional drawing. It is a figure which shows the coil | winding fastening structure of 4th Embodiment which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the winding clamp | tightening structure of 5th Embodiment which concerns on this invention, Comprising: (A) is a side view, (B) is a principal part front view, (C) is a principal part side view. It is a figure which shows the winding clamp | tightening structure of 6th Embodiment which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the coil | winding fastening structure of the conventional static induction appliance (self-cooling system in a coil | winding), Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the coil | winding fastening structure of the conventional static induction appliance (winding forced cooling system), Comprising: (A) is a front view, (B) is a side view.

  Hereinafter, an example of an embodiment of a static induction electric machine according to the present invention will be specifically described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same member as the prior art example shown in FIG. 9, FIG.

(1) First embodiment (configuration)
A first embodiment according to the present invention will be described with reference to FIGS. 1 (A) and 1 (B) show the winding tightening configuration of the self-cooling system in the winding according to the first embodiment, and FIGS. 2 (A) and 2 (B) are modifications of the first embodiment. FIG. 3 shows a winding fastening configuration of the in-winding forced cooling system, and FIG. 3 shows a configuration of the winding fastening metal fitting in the first embodiment.

  As shown in FIGS. 1 and 2, a laminated iron core 1 formed by laminating a plurality of electric iron plates is composed of a leg iron 1a into which a winding 2 is inserted and a yoke 1b connected to the top and bottom of the leg iron 1a. Composed. The leg iron 1a is clamped by the leg iron fastening fitting 3, and is fastened and integrated by a plurality of leg iron fastening bands 18. Moreover, the yoke 1b is clamped by a yoke fastener 4 having the same width as the minimum width of the yoke 1b, and is clamped and integrated with a plurality of yoke fastening bands 19.

  Winding clamps 5 are arranged above and below the winding 2. The winding clamp 5 is connected to the upper and lower portions of the leg clamp 3, and a thickness adjusting spacer 6 is inserted between the winding clamp 5 and the winding 2. The winding 2 is clamped.

  The structural feature of the present embodiment is that the winding fastening metal fitting 5 is used as a fastening member for the winding 2 in place of the conventional square steel pipes 16 and 17. As shown in FIG. 3, the winding clamp 5 includes a vertical yoke-side flat plate 5 a located on the yoke 1 b side, a horizontal winding clamp plate 5 b that receives the tightening of the winding 2, and a cross-section. Are combined with an L-shaped reinforcing plate 5c having an L-shape. The yoke side flat plate 5a and the winding fastening plate 5b are combined in an L shape and welded together.

  In addition, a plurality of connecting member receiving plates 5 d are attached to the winding clamp 5. The connecting member receiving plate 15d is a portion for connecting the upper and lower connecting members 7 and 8 and the winding fastening metal fitting 5 and is formed on the yoke side flat plate 5a so as to face the winding fastening plate 5b. It is attached to the upper edge or the lower edge. That is, the lower winding fasteners 5 are connected to each other by the lower connecting member 8, and the upper winding fasteners 5 are connected to each other by the upper connecting member 7. In the upper winding clamp 5, a hanging ear 9 for lifting the contents structure is attached to the side surface on the laminated core 1 side.

  The mounting range of the L-shaped reinforcing plate 5c in the winding clamp 5 is a position where the winding clamp 5 is required to have high strength, that is, the mounting position of the hanging ear 9 or the anti-tightening from the winding 2. The position of the spacer 6 that receives the force is covered. By having this L-shaped reinforcing plate 5c, the winding clamp 15 is partially box-shaped in cross section.

  The yoke-side flat plate 5a and the winding fastening plate 5b are the main rigid elements of the winding fastening bracket 5 and are composed of thick plates, and the L-shaped reinforcing plate 5c is partially formed by the winding fastening bracket 5. Since it is a member that increases rigidity, it is composed of a thin plate. In addition, the external dimension of the coil | winding fastening metal fitting 5 is adjusted according to the dimension of the yoke 1b.

  By the way, as shown in FIG. 2, in the in-winding forced cooling system, the cooling pipe 11 for guiding the cooling fluid from the outside of the tank 10 of the static induction electric machine and the box-shaped portion in the lower winding fastening metal fitting 5 are connected. The At this time, a through hole 6a and a hole 5e are opened on the upper surface of the spacer 6 inserted between the winding 2 and the lower winding fastening bracket 5 and the L-shaped reinforcing plate 5c of the winding fastening bracket 5, respectively. A passage through which the cooling medium flows into the winding 2 is formed.

(Function)
In the first embodiment configured as described above, the fastening fastener 5 is lighter in weight than the conventional square steel pipes 16 and 17 by adopting the winding fastening bracket 5 that is partially box-shaped. It is possible to securely hold the winding with. In addition, since the square steel pipes 16 and 17 are not employed as the fastening metal fittings for the winding 2, it is possible to omit a process requiring a long work time for mechanical correction at the time of carrying in the material of the square steel pipe.

  Moreover, since the winding fastening metal fitting 5 is not a square steel pipe, it is not necessary to determine the dimensions by the model of the square steel pipe. Therefore, it is possible to freely determine the optimum plate thickness and dimensions according to the required rigidity and the dimensions of the yoke 1b. For this reason, as in the prior art, a large coil clamped square steel pipe 16, 17 is adopted according to the size of the yoke 1b, or a reinforcing plate is attached to the coil clamp square steel pipe 16, 17. There is no need, and an increase in the mass of the clamp can be avoided. Furthermore, since it is not necessary to attach the reinforcing plate to the square steel pipes 16 and 17, distortion due to welding is reduced, and the manufacturing accuracy can be increased.

(effect)
According to the winding fastening metal fitting 5 of the first embodiment, the yoke side plate 5a and the winding fastening plate 5b are combined in an L shape and welded, and the L-shaped reinforcing plate 5c is attached to the winding 2 Since only the tightening position and the lifting position are partially box-shaped, the mass of the winding clamp 5 is the same as that of the conventional winding clamp brackets 16 and 17 using the winding clamp square steel tubes 16 and 17. The same level.

  On the other hand, since the process of mechanical correction at the time of carrying in the square steel pipe can be omitted, the working time can be greatly shortened. Furthermore, in the winding clamp 15 according to the first embodiment, an increase in welding distortion can be suppressed, and manufacturability can be improved.

  Moreover, since the winding fastening metal fitting 5 can be designed with a free dimension without being influenced by the restrictions on the type of the square steel pipe, it is easy to perform a lead connection design arranged around the winding fastening metal fitting 5. In addition, when a square steel pipe is used, the design itself may not be possible without a standard square steel pipe having the necessary rigidity. Since there is no restriction, it is possible to always design a winding fastening member having a desired rigidity. By obtaining good manufacturability and designability as described above, it is possible to enhance product competitiveness.

(2) Second embodiment (configuration)
Subsequently, a second embodiment according to the present invention will be described with reference to FIG. The winding fastening metal fitting 15 according to the second embodiment is an L-shaped winding fastening plate 15a that is formed by bending the winding fastening plate 5b and the yoke side flat plate 5a together, and partially. It is characterized in that an L-shaped reinforcing plate 5c having a box shape is attached. The attachment range of the L-shaped reinforcing plate 5c is the same as that of the first embodiment, and requires high strength, that is, the attachment position of the hanging ear 9 and the spacer 6 that receives the reaction force of tightening from the winding 2 The range covers the position.

(Function)
In the second embodiment configured as described above, the yoke-side flat plate is used in the production of the winding clamp by using the winding clamp 15 having the integral L-shaped winding clamp 15a. The welding work process of 5a and the winding fastening board 5b can be reduced. Thereby, the coil | winding fastening metal fitting 15 which suppressed the welding distortion can be obtained.

(effect)
According to said 2nd Embodiment, the welding operation process at the time of manufacture of the winding fastening metal fitting 15 can be reduced, and the increase in welding distortion can be suppressed. Therefore, even when a mechanical correction operation is required after the winding clamp 15 is manufactured, this can be easily performed. Therefore, the manufacturability is further improved as compared with the first embodiment, the price can be reduced, and a static induction electric appliance having a strong product competitiveness can be provided.

(3) Third embodiment (configuration)
Next, a third embodiment according to the present invention will be described with reference to FIG. As shown in FIG. 5, the upper winding fastening metal fitting 25 has an L-shaped reinforcing plate 5c bent at an obtuse angle in accordance with the length of the connecting member receiving plate 5d to form a square-shaped reinforcing plate 25a having a trapezoidal cross section. It is configured to have a box shape.

(Function)
In the third embodiment configured as described above, the bent portion of the winding fastening metal fitting 25 is bent at an obtuse angle in accordance with the length of the connecting member to form a rectangular reinforcing plate 25a. The space on the opposite side can be widened. Therefore, as compared with the first embodiment, there is an advantage that it is easier to secure the insulation distance of the content wiring around the winding fastening metal fitting 5b.

(effect)
The unique effects of the above third embodiment are as follows. In other words, since the space in which the content wiring can be performed increases, a static induction electric device that further improves the assembly and workability of the content wiring can be provided, and the product competitiveness can be enhanced.

(4) Fourth embodiment (configuration)
A fourth embodiment according to the present invention will be described with reference to FIG. In the fourth embodiment, a notch hole 5f for the lifting bracket for inserting the lifting bracket 13 is provided on the upper surface of the lifting position of the L-shaped reinforcing plate 5c of the winding clamp 5. Further, a notch hole 5g for a pin for detachably inserting the lifting pin 12 is provided on the side of the lifting position of the L-shaped reinforcing plate 5c and the yoke side flat plate 5a.

(Function)
In the fourth embodiment as described above, when lifting the stationary induction device, the lifting metal fitting 13 is passed from the upper side of the winding fastening metal fitting 15 through the notch hole 5f on the upper surface of the L-shaped reinforcing plate 5c. Insert into the box-shaped interior of the clamp 5.

  Then, the lifting pin 12 is inserted from the side surface of the L-shaped reinforcing plate 5 c into the notch hole 5 g and inserted into the box-shaped interior of the winding clamp 5. In this way, the lifting metal fitting 13 is fixed to the winding fastening metal fitting 5. That is, in the fourth embodiment, the lifting bracket 13 can be freely attached and detached, and the hanging ear 9 can be omitted.

(effect)
According to the fourth embodiment, since the hanging metal fitting 13 is detachable, the hanging ear 9 can be omitted. Therefore, the height of the content structure of the stationary induction device can be kept low. Tank height can be reduced by reducing the height inside the tank. Therefore, the static induction electric appliance can be made more compact, the tank steel material and the tank oil amount can be reduced, and the production cost can be reduced.

  Moreover, since the L-shaped reinforcing plate 5c forming the cutout holes 5f and 5g is a part of the winding fastening metal fitting 5, it is drilled before being attached to the yoke side flat plate 5a or the winding fastening plate 5b. Is possible. Therefore, the machining operation is extremely easy as compared to the case of drilling a square steel pipe.

(5) Other Embodiments The present invention is not limited to the above embodiment, and the dimensions and shapes of the constituent members can be changed as appropriate. For example, in the fourth embodiment, the lifting member is detachable and the hanging ear 9 is omitted, but the embodiments shown in FIGS. 7 and 8 are also included as modifications of the lifting structure of the contents structure. To do.

  In the embodiment shown in FIG. 7, the lifting pin 12 is installed inside the box-shaped portion of the winding fastening metal 15, and the lifting metal 13 is rotatably attached thereto. A cutout hole 5h having a length dimension of the lifting bracket 13 is formed on the upper surface of the lifting position of the L-shaped reinforcing plate 5c.

  In the embodiment of FIG. 7, the lifting bracket 13 can be lifted with the lifting bracket 24 facing upward and taken out from the notch hole 15 i. Further, the lifting bracket 13 can be housed inside the box of the box-shaped portion of the winding clamp 5 except when the stationary induction device is suspended. For this reason, in addition to the operation and effect of the fourth embodiment, since there is no attachment work of the lifting pin 12 and the lifting bracket 13, the work cost and the work period can be reduced, and further the production cost can be reduced. An induction machine can be provided.

  Further, in the embodiment of FIG. 8, the hanging ear 9 is attached to the yoke side flat plate 5 a inside the box shape of the winding fastening metal fitting 5, and a notch is formed on the upper surface of the lifting position of the L-shaped reinforcing plate 5 c of the winding fastening metal fitting 5. It is structured to provide a hole. When lifting the contents, the lifting wire 20 can be lifted by being attached to the lifting ear 9 through a notch hole 5f provided on the upper surface of the lifting position of the L-shaped reinforcing plate 5c. According to such an embodiment, compared with the embodiment shown in FIG. 7, it is possible to reduce the work cost and work period by omitting the mounting of the lifting pin 12 and the lifting bracket 13 with a simple structure, and significant production. Cost reduction effect.

DESCRIPTION OF SYMBOLS 1 ... Laminated iron core 1a ... Leg iron 1b ... Joint 2 ... Winding 3 ... Leg iron fastening bracket 4 ... Joint fastener 5, 15, 25 ... Winding fastener 5a ... Joint side flat plate 5b ... Winding Wire fastening plate 5c ... L-shaped reinforcing plate 5d ... Connecting member receiving plates 5f, 5g, 5h ... Notched hole 6 ... Spacer 7 ... Upper connecting member 8 ... Lower connecting member 9 ... Hanging ear 10 ... Tank 11 ... Cooling pipe 12 ... Lifting metal fitting 13 ... Lifting pin 16 ... Upper coil tightening square steel pipe 17 ... Lower coil tightening square steel pipe 18 ... Leg iron tightening band 19 ... yoke tightening band 20 ... lifting wire

Claims (5)

A leg iron composed of a laminated iron core in which a plurality of electric iron plates are laminated, an upper yoke, and a lower yoke are provided, and a winding is wound around the leg iron. The upper winding fasteners are arranged on both side surfaces of the upper yoke in parallel with the longitudinal direction of the yoke, and are integrated on both side surfaces of the lower yoke with the longitudinal direction of the yoke. In the static induction electric machine having a structure in which the lower winding fastening metal fitting is arranged and the winding is fastened by the upper and lower winding fastening metal fittings,
The yoke is arranged in parallel to the stacking direction, and is sandwiched by a yoke fastener having a width dimension equivalent to the minimum width of the yoke, and is connected to the yoke by a plurality of yoke fastening bunts. By uniting the yoke fastener together,
At least one of the upper and lower winding clamps is composed of a yoke-side flat plate located on the yoke side and a winding clamp plate for receiving the tightening of the winding, and the joint The winding fastening plate is attached to the winding side of the iron-side flat plate to form an L shape, and an L-shaped reinforcing plate is attached to a position for receiving tightening from the winding and a position for attaching a lifting bracket. With a box shape,
The upper winding clamp and the lower winding clamp are connected with the leg clamps to sandwich the windings,
A stationary induction electric appliance characterized in that the lower winding clamps are connected by a lower connecting member, and the upper winding clamps are connected by an upper connecting member.   An L-shaped plate is formed by bending the yoke-side flat plate of the winding fastening metal fitting and the winding fastening plate together, and the L-shaped reinforcing plate is attached to the L-shaped plate. The static induction machine according to claim 1.   The stationary induction machine according to claim 1 or 2, wherein the L-shaped reinforcing plate has an obtuse bending angle. Forming an opening at the content lifting position of the L-shaped reinforcing plate of the winding clamp;
The stationary induction machine according to any one of claims 1 to 3, wherein a lifting pin or a wire that can be inserted into the opening is attached.   The stationary induction device according to any one of claims 1 to 4, wherein the lifting metal fitting is housed inside a box shape of the winding fastening metal fitting.

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