JP2005217042A - Stationary induction electric apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stationary induction electric apparatus, easy to construct and requiring but a short time for construction. <P>SOLUTION: The main body of the stationary induction electric apparatus having an iron core 1, a low-voltage winding 2, and a high-voltage winding 3, is accommodated in a tank 11, and the gap produced between a main body-side partition board 14 positioned under the low-voltage winding 2 and the high-voltage winding 3, and the inner wall of the tank 11, is stopped by a partition board sealing member 15 provided near the main body-side partition board 14. In this stationary induction electric apparatus, a tank-side fixed partition board 32 is provided on the inner wall of the tank 11, and, for stopping the gap, the partition board sealing member 15 lands on a tank-side fixed sealing member 31 provided on the tank-side fixed partition board 32. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a static induction electric device such as a transformer, and more particularly to a static induction electric device of a system that cools by circulating a cooling medium.

  A static induction electric device represented by a transformer or a reactor is generally composed of an electric main body (content main body) mainly composed of an iron core and a winding, and a tank for storing the main body. An electric insulating medium is sealed inside to improve the electric insulating property of the electric body.

  By the way, when a static induction appliance is operated, heat is generated from the winding and the iron core due to loss, and if left as it is, the temperature of the electric appliance body rises. Therefore, it is customary to provide some heat dissipation means and to suppress the temperature rise by introducing heat to the outside, but as a heat dissipation means at this time, there is a static induction electric device that is designed to cool the cooling medium by forced circulation. Conventionally known (for example, see Patent Document 1).

  Therefore, the prior art of a static induction apparatus of such a system that circulates and cools such a cooling medium will be described with reference to FIG. Here, FIG. 4 shows, as an example, a case where the static induction electric machine is a transformer. In this case, the electric body includes the iron core 1, the low voltage winding 5 and the high voltage winding 6 wound around the iron core 1. Is configured as the main part.

  At this time, the inner insulating cylinder 2 is provided between the iron core 1 and the low-voltage winding 5, and the inner insulating cylinder 3 is provided between the low-voltage winding 5 and the high-voltage winding 6. An outer insulating cylinder 4 is provided on the outside. The low-voltage winding 5 and the high-voltage winding 6 are supported by a winding cradle 7, and a coil holding insulator 10 is provided on the low-voltage winding 5 and the high-voltage winding 6. .

  On the other hand, the iron core 1 is provided with iron core fastening members 8 and 9 made of a channel material having a U-shaped cross section, whereby the yoke portions above and below the iron core 1 are firmly tightened. At the same time, the iron core fastening member 8 on the lower side can function as a leg for holding the electric body.

The electric body configured in this way is, for example, a cooling medium made of an insulating gas such as SF ₆ (sulfur hexafluoride), or a cooling made of a synthetic oil-based insulating liquid such as mineral oil or silicon oil. The tank 11 is filled with a medium.

  At this time, an inlet 12 for the cooling medium is provided at the lower part of the tank 11, and the cooling medium flows into the tank 11 as indicated by an arrow line 13 and directly enters the low-voltage winding 5 and the high-voltage winding 6. It flows upward while touching, flows out of the tank 11 from an outlet (not shown) at the upper part of the tank 11, and again flows from the inlet 12 into the tank 11 via a heat exchanger (heat radiator) (not shown). It is comprised so that it may flow into.

  The cooling medium circulation at this time may be due to natural circulation due to convection or forced circulation using a pump, and either one is selected according to the application or specifications of the static induction appliance, and the temperature rise is within the standard. To fit.

  At this time, in order to flow the cooling medium along the path indicated by the arrow line 13, the main body side partition plate 14 is provided around the entire periphery including the lower end of the high voltage winding 6 and the iron core 1. A partition plate sealing member 15 made of a flexible member having a suitable rigidity such as a synthetic rubber material is attached around 14, and the periphery of the partition plate sealing member 15 is in contact with the inner wall surface of the tank 11. When bent, it bends upward, thereby closing the gap G between the main body side partition plate 14 and the inner wall surface of the tank 11 shown in FIG.

As a result, the cooling medium flowing in from the lower part of the tank 11 is prevented from directly reaching the discharge port in the upper part of the tank 11, and the upper part is in contact with the low voltage winding 5 and the high voltage winding 6. This ensures that sufficient cooling is obtained.
JP 2003-178922 A

  The above prior art does not consider the influence of the partition plate sealing member on the assembling work of the static induction appliance, and has a problem in that the assembling workability is lowered and the working time is increased.

  In the case of such a static induction electric device, first, the electric device main body is assembled. Then, after that, it is common to adopt a construction method in which the assembled electric body is inserted into a tank whose upper part is opened, and in this case, the conventional technique described in FIG. Then, when the electric appliance body starts to be inserted into the tank 11, the periphery of the partition plate sealing member 15 immediately contacts the inner wall surface of the tank 11 at the upper end of the tank 11.

  After that, the electric body is moved downward, lowered to the bottom of the tank 11, and the periphery of the partition plate sealing member 15 remains in contact with the inner wall surface of the tank 11 until the electric body is installed in the tank 11. The partition plate sealing member 15 slides on the inner wall surface of the tank 11.

  By the way, the size of the gap G (FIG. 5) to be closed by the partition plate sealing member 15 at this time is considerably smaller than the size of the electric body and the tank 11. It is difficult to correctly maintain the position of the electric appliance main body with respect to the inner wall surface of the tank 11 when inserting into the tank.

  However, if the position of the electric body relative to the inner wall surface of the tank 11 is not properly maintained, when the electric body is moved downward, the periphery of the main body side partition plate 14 comes into contact with the inner wall surface of the tank 11 and scratches are caused. There is a risk of damage if it is marked or severe.

  Therefore, in the prior art, precise positioning is required for the work when the contents of the main body of the electric appliance are stored in the tank 11, so that the assembling work is difficult and time-consuming. As a result, the assembling workability is lowered and the working time is reduced. There will be a problem with the increase of.

  In the prior art, since the working time becomes long, the amount of water absorbed by the insulator of the main body of the electric appliance increases at this time, so it is long for vacuuming work for removing water after being stored in the tank 11. Time was required, and there were also problems that led to delays in assembly work processes and quality degradation.

  The present invention has been made in view of the foregoing points, and an object of the present invention is to provide a stationary induction device that can be easily assembled and can be shortened in work time.

  The object is to arrange an electric body having at least an iron core and a winding in the tank, and to guide the cooling medium flow path in the tank to the winding by a main body side partition plate provided at a lower portion of the winding. In the static induction appliance, when the electric body is stored in the tank, the tank surrounds the periphery of the electric body so as to face the peripheral portion of the main body side partition plate, and the tank extends over the entire circumference. A tank-side fixed partition plate attached to the inner wall surface is provided in a state of extending horizontally from the inner wall surface, and when the electric appliance body is stored in the tank, the tank-side fixed partition plate is disposed between the body-side partition plate and the tank-side fixed partition plate. The gap is closed by a flexible sealing member.

  At this time, the object is also achieved by the flexible sealing member being attached to the main body side partition plate. Similarly, at this time, the flexible sealing member is the tank side partition plate. The above-mentioned object is achieved also by being attached to.

  According to the present invention, in the assembly work of the static induction electric machine, the work of housing the electric body in the tank is facilitated, so that workability can be improved.

  As a result, since the working time can be shortened, the amount of moisture absorbed by the insulator of the main body of the electric appliance during the working can be obtained, and a highly reliable static induction electric appliance can be obtained at a low cost.

  Hereinafter, the static induction electric machine by this invention is demonstrated in detail by embodiment of illustration.

  Here, FIG. 1 shows an embodiment in which the static induction device according to the present invention is applied to a transformer. In this figure, 31 is a tank side fixed sealing member, 32 is a tank side partition plate, The configuration is the same as that of the prior art described in FIG.

  First, the tank side fixed sealing member 31 is a member having an L-shaped cross section, and is mounted on the tank side partition plate 32 so that the rising portion 31A is parallel to the inner wall surface of the tank 11. .

  At this time, as shown in the figure, the tank side partition plate 32 surrounds the periphery of the electrical unit body so as to face the peripheral part of the body side partition plate 14 when the electrical unit body is installed in the tank 11. It is attached to the inner wall surface in a state extending horizontally from the inner wall surface of the tank 11 over the entire circumference.

  As a result, the tank-side sealing member 31 is also mounted on the tank-side partition plate 32 over the entire circumference in a state surrounding the periphery of the electric body, like the tank-side partition plate 32. .

  Then, in the embodiment of FIG. 1, as shown in the figure, when the electric body is installed in the tank 11, the periphery of the main body side partition plate 14 faces the tip of the tank side partition plate 32. When the main body of the electric appliance is inserted into the tank 11 from above, when the partition plate sealing member 15 around the main body side partition plate 14 comes into contact with the rising portion 31A of the tank side fixed sealing member 31, it bends up here. As a result, as shown in FIG. 2, the gap G between them is closed.

  Therefore, also in this embodiment, the cooling medium flowing into the lower part of the tank 11 from the inlet 12 reaches the discharge port at the upper part of the tank 11 directly from here. Blocked by the sealing member 31, the partition plate sealing member 15, and the tank side partition plate 32, the cooling medium flows upward in a state where the low voltage winding 5 and the high voltage winding 6 are reliably touched as indicated by the arrow line 13. As a result, sufficient cooling is obtained.

  In the case of the embodiment of FIG. 1, the tank side partition plate 32 is provided as a counterpart to which the partition plate sealing member 15 must be brought into contact when the electric appliance main body is stored in the tank 11. It can be limited only to the rising portion 31A of the tank side fixed sealing member 31 at the tip of 32.

  Moreover, as a result, as shown in detail in FIG. 2, in this embodiment, a space S () that is considerably longer than the gap G between the periphery of the main body side partition plate 14 and the inner wall surface of the tank 11. S >> G).

  Therefore, according to the embodiment of FIG. 1, when the electric appliance main body is housed in the tank 11, it is not necessary to insert the partition plate sealing member 15 while being in contact with the inner wall surface of the tank 11. A space S having a considerably long length exists between the periphery of the partition plate 14 and the inner wall surface of the tank 11, so that the partition plate sealing member 15 is located at the front end of the tank side partition plate 32. There is no need to pay particular attention to positioning until the rising portion 31A comes into contact with 31A.

  Therefore, according to this embodiment, the assembly work at the time of inserting an electric appliance main body into the tank 11 can be easily advanced, work can be completed in a short time, and as a result, workability can be improved.

  Moreover, according to this embodiment, since the assembly work at the time of inserting an electric device main body into the tank 11 can be completed in a short time, the amount of moisture absorbed by the insulator of the electric device main body during operation can be obtained. Thus, a highly reliable static induction appliance can be obtained at low cost.

  Incidentally, in the prior art described with reference to FIG. 4, the partition plate sealing member 15 slides on the inner wall surface of the tank 11 during the operation of inserting the electric body into the tank 11. For this reason, it is necessary to make the inner wall surface of the tank 11 smooth, and for this reason, it was not possible to install a support fitting or a seat on the inner surface of the tank 11.

  However, according to the embodiment of FIG. 1, as shown in FIG. 2 in particular, since the space S is provided, there is an advantage that a support fitting or a seat can be arbitrarily installed on the inner surface of the tank 11.

  Next, FIG. 3 shows another embodiment of the present invention. This embodiment is different from the embodiment of FIG. 1 in that the partition plate sealing member 15 is provided in the tank side partition plate 32. For this reason, the main body side partition plate 14 is provided with the sealing material receiving member 33, and other configurations are the same as those in the embodiment of FIG.

  Therefore, it is obvious that the same effect as that of the embodiment of FIG. 1 can be obtained also by the embodiment of FIG. 3, but in the case of the embodiment of FIG. Can be reduced, and the strength is also stable.

It is a fragmentary sectional side view which shows one Embodiment of the static induction appliance by this invention. It is detail drawing which shows the structure of the partition plate and partition plate sealing member in one Embodiment of the static induction appliance by this invention. It is detail drawing which shows the structure of the partition plate and partition plate sealing member in other one Embodiment of the static induction appliance by this invention. It is a fragmentary sectional side view which shows an example of the static induction machine by a prior art. It is detail drawing which shows the structure of the partition plate and partition plate sealing member in an example of the static induction machine by a prior art.

Explanation of symbols

1: Iron core 2, 3: Inner insulating cylinder 4: Outer insulating cylinder 5: Low voltage winding 6: High voltage winding 7: Winding cradle 8, 9: Iron core clamping member 10: Winding clamp insulator 11: Tank 12 : Inlet (cooling medium inlet)
13: Arrow line (arrow line indicating the path of the cooling medium)
14: Main body side partition plate 15: Partition plate sealing member 31: Tank side fixed sealing member 31A: Rising portion (rising portion of tank side fixed sealing member 31)
32: Tank side partition plate 33: Sealing material receiving member

Claims (3)

Static induction in which an electric body consisting of at least an iron core and a winding is arranged in the tank, and a flow path of a cooling medium in the tank is guided to the winding by a main body side partition plate provided at a lower portion of the winding. In electrical appliances,
When the electric appliance main body is stored in the tank, it surrounds the electric appliance main body so as to face the peripheral portion of the main body side partition plate, and extends horizontally from the inner wall surface of the tank over the entire circumference. In the state, provided a tank side fixed partition plate attached to the inner wall surface,
A static induction electric device, wherein when the electric appliance main body is stored in the tank, a gap between the main body side partition plate and the tank side fixed partition plate is closed by a flexible sealing member. The static induction machine according to claim 1,
The static induction device, wherein the flexible sealing member is attached to the main body side partition plate. The static induction machine according to claim 1,
The static induction device, wherein the flexible sealing member is attached to the tank side partition plate.

Images