JP4686072B2 - Air conditioner switch with protective frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch for aerial work with a protective frame. More specifically, the switch body is made of an electrically insulating resin, and the protective frame is attached to the switch body so as to surround the switch. It relates to a switch for aerial work with a protective frame.
[0002]
[Prior art]
In high-voltage distribution lines, uninterruptible construction work is generally performed at present when work is performed such as replacement of distribution lines and lifting of switches and transformers.
This uninterruptible construction work is performed without stopping power transmission during construction work for customers located on the construction section and its load side, forming a bypass circuit using cables, construction switches, etc. The power transmission is continued by this bypass circuit.
[0003]
Equipment such as a construction switch used to form the bypass circuit is usually stored in a case such as a protector at a sales office of a power company or a sales office of a construction company commissioned by a power company. It is always in the state of being stored, loaded on the construction vehicle in the state of being stored at the time of the above construction, transported to the work site, removed from the storage case such as a protector, and temporarily installed on the power pole at the work site. Yes.
[0004]
The construction switches used are stipulated by JIS and other standards to satisfy various performances, and the case body of the switch body is a sealed container made of ordinary steel or stainless steel by box making. It is common to become.
[0005]
[Problems to be solved by the invention]
An insulation (space) distance is required between the charging part (electrode, etc.) of the switch and the ground part (main body case, etc.) to satisfy a predetermined withstand voltage value, and the switch cannot be downsized. There is a problem.
[0006]
Furthermore, when a short circuit accident occurs inside the switch for some reason during use of the device, it is necessary to prevent the switch body from being scattered so as not to cause a public disaster.
Therefore, the strength (case thickness etc.) that can withstand the internal pressure rise caused by the short circuit accident current is required, and there is a problem that the weight cannot be reduced.
[0007]
As a construction switch used for uninterruptible construction, there is a demand for a compact and lightweight construction switch that does not take up space during storage and transportation, and considers workability for installation or removal from a utility pole.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 is a switch made of an insulating synthetic resin having an opening, and is attached to the switch body so as to surround the switch and is also removed from the switch. a protective frame without attachment to the telephone pole with a Sohashira unit capable, there by the switch opening covering the protective frame with aerial form construction switching device comprising a protection in having a pressure guide internal release both The protective frame is provided with a structure that allows the upper surface and the bottom surface of the protective frame to be fitted, and when the switches are stacked, the protective frame structure that fits the upper surface and the bottom surface of the opposing protective frame is provided. Air-operated construction switch with frame.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS.
[0013]
FIG. 1 shows a cross-sectional view of an embodiment of claim 1.
3 is a molding such as a vacuum casting method or a pressure gelation method using a material such as an epoxy resin excellent in various properties such as ultraviolet resistance, mechanical properties, tracking resistance, arc resistance, and environmental resistance. It is a main body case that is less likely to generate internal distortion and voids by a method, and has a box shape with an open bottom.
In the embodiment, the opening is the bottom, but the present invention is not limited to this, and the opening may be provided on the side and top.
[0014]
Reference numerals 3a and 3b denote a load side bushing portion and a power source side bushing portion which are simultaneously molded at opposite positions when the case 3 is molded, and a female contact in which a contact assisting piece 7 is inserted into the bushing portions 3a and 3b. Copper center conductors 5 and 6 each having a child 5a and 6a are inserted.
[0015]
One end 5 b located inside the case 3 of the central conductor 5 is connected to the fixed electrode 11 via the conductive member 10.
One end 6b located inside the case 3 of the central conductor 6 is pivotally connected to one end 12b of the blade-shaped movable electrode 12 electrically and mechanically by a pivoting means such as a pin 30.
[0016]
The fixed electrode 11 and the movable electrode 12 maintain good contact with the male contacts 8a and 9a provided on the cable attachments 8 and 9 via the center conductors 5 and 6 and the contact auxiliary piece 7. It can be done.
[0017]
FIG. 2 shows a bottom view of the switch body 2.
The operation of the handle 14 provided outside the case 3 is transmitted to the movable electrode 12 through the operation mechanism 59 and the link mechanism 13, and the movable electrode 12 contacts or separates from the fixed electrode 11 in conjunction with the movement of the handle 14. By doing so, the electric circuit is turned on or off.
[0018]
4 and 5 show a left side view and a right side view of the switch body 2.
Reference numerals 24 and 25 are mounting plates made of aluminum, stainless steel, steel, or the like. Three-phase (three) insertion holes 24au, 24av, 24aw, 25au, 25av, 25aw arranged in parallel on the upper portions of the mounting plates 24, 25. Is inserted into the U-phase bushings 3au, 3bu, the V-phase bushings 3av, 3bv, and the W-phase bushings 3aw, 3bw, and is screwed onto a mounting nut (not shown) inserted into the case 3 with a screw 26. It has been stopped.
[0019]
FIG. 6 shows an embodiment of a protective frame.
The protective frame 40 is assembled in a square frame shape using a plate material, a bar material or a pipe material made of a metal such as aluminum, stainless steel or steel, or a thermosetting resin such as an epoxy resin, as appropriate, In the present embodiment, two (one pair) guard portions 41 formed by bending a pipe member into a U-shape, and a columnar portion 47 including a side surface portion 44 provided with a hook 45 and a receiving piece 46. It is configured.
The columnar part 47 and the guard part 41 are fastened by screwing the side face part 44 and the opening end of the guard part 41 with screws 43.
The two (one pair) guard portions 41 are fixedly connected by an upper connecting plate 56, a lower connecting plate 28, and a connecting pipe 42 that are spanned at appropriate intervals.
[0020]
The switch body 2 and the protective frame 40 are fixed by fixing the upper connecting plate 56 and the upper mounting holes 24c and 25c of the mounting plates 24 and 25 with screws 48, the lower connecting plate 28 and the lower mounting holes 24d of the mounting plates 24 and 25, 25d is screwed with the screw 29, and the guard part 41 is fastened to the switch body 2.
In this state, the switch main body 2 and the protective frame 40 are integrated with each other by screwing and fixing the side surface 44 of the columnar portion 47 to the opening end of the guard portion 41 with screws 43.
[0021]
A protective device 60 made of a metal such as aluminum, stainless steel or steel, a thermosetting resin such as an epoxy resin, or a synthetic rubber such as ethylene-propylene rubber so as to cover the opening of the switch body 2 is provided on the lower connecting plate 28. It is fixed to the lower connecting plate 28 across the gap.
[0022]
Examples of the protector 60 are shown in FIGS.
FIG. 12 shows an embodiment using a punching plate, and the protective device can be fixed to the switch body in addition to the above.
FIG. 13 shows an embodiment in which X-shaped grooves are provided as mechanical weak points.
As the structure of the pressure release guide portion, in addition to the above, any structure may be used as long as it regulates the pressure release direction when releasing the pressure increase at the time of the internal short circuit to the outside.
[0023]
FIG. 10 shows a columnar state diagram of the airframe construction switch 1 with a protective frame having the above-described configuration.
The aerial work switch 1 stored in the sales office is loaded onto a construction vehicle and transported to a construction site. Of course, when the construction is completed, the aerial work switch 1 is removed from the utility pole, transported, and taken home.
[0024]
At the construction site, the mounting device 54 having the hanging portion 51, the receiving portion 52 and the latching pin 53 is attached to a predetermined position of the utility pole 50 in advance, and the airborne construction switch 1 transported is illustrated on the hook 55. The hook 45 and the receiving piece 46 attached to the side surface 44 of the protective frame 40 are engaged with the hook 51 and the receiving portion 52, and the hook pin 53 is inserted. Thus, the aerial work switch 1 can be easily fixed and supported on the utility pole.
[0025]
In the above state, when a bypass circuit was formed and power was transmitted, an internal short circuit accident occurred for some reason, and when the internal pressure of the switch increased due to an arc current due to the short circuit accident, The switch for structural work 1 releases the internal pressure to the outside from the initial point of the internal pressure rise through the opening portion of the protective device or the groove portion opened by the internal pressure from the bottom surface of the switch body. The internal pressure rise can be suppressed, and the breakage of the switch body can be prevented.
[0026]
In addition, the surrounding protective frame can protect the switch body from collisions with other equipment, so that the mechanical strength of the switch body, that is, the thickness of the switch case 3 can be reduced. Can be reduced in weight.
[0027]
By using an insulating synthetic resin or synthetic rubber as the material of the protector, the insulation distance between the charging part and the protector can be made smaller than in the case of a conventional metal case.
[0028]
FIG. 11 shows another embodiment using synthetic rubber such as ethylene-propylene rubber. Reference numeral 60 denotes a protector that is inserted on the side surface of the opening of the switch body 2 by the elastic force of the rubber body so as to cover and close the opening of the switch body 2.
[0029]
The structure for covering the opening of the switch body 2 with the protective device 60 is not limited to the above embodiment.
A structure in which a substantially groove-shaped portion is provided on the bottom surface of the opening side wall plate of the switch body 2 and the front end of the protective device is inserted therein may be used, and the switch is formed by covering and closing the opening of the switch body 2 It is possible to prevent dust and the like from entering the inside.
[0030]
In the event of an internal short circuit accident, the protective device 60 is deformed by the internal pressure, and the portion inserted into the side surface of the switch body 2 is open. The pressure can be released, and damage to the switch body can be prevented. Since the protective device 60 is fixed to the protective frame 40, it is not scattered. Moreover, it can also be set as the structure which provided the pressure release guide part in the bottom face of this protective device.
[0031]
The groove shape may be an arbitrary shape such as a V shape in addition to the embodiment of FIG. Further, in order to open the mechanical weak point portion of the protective device more quickly, a plate provided with a hole having a shape approximately the same as the shape of the mechanical weak point portion provided in the protective device may be attached to the lower side of the protective device. .
[0032]
Another embodiment is shown in FIGS. 14 (a) and 14 (b). 14A and 14B are a front view and a right side view of the embodiment, and 61 is a substantially L-shaped cross-sectional shape made of aluminum, stainless steel, and steel fixed to the bottom surface of the guard portion 41. It is a metal fitting provided with a concave cutout hole.
[0033]
The stacked state is shown in FIGS. 15 (a) and 15 (b).
At the time of stacking, the recess notch of the upper stacking switch fitting 61 is fitted to the side part 44 of the lower stacking switch to restrict the movement in the front-rear direction, and the side wall surface of the upper stacking switch fitting 61 is the guard part of the lower stacking switch. The movement in the left-right direction is restricted by covering the upper outer side of 41, so that it can be stacked without lateral displacement.
[0034]
【The invention's effect】
The present invention has the following effects.
By forming the switch body with an insulating synthetic resin, the insulation distance between the charging part and the ground can be made smaller than that of a conventional metal case, and the switch body can be made smaller. Furthermore, when the switch body is formed and manufactured, parts such as the bushing portion center conductor and mounting nut can be manufactured simultaneously with high dimensional accuracy, so that the number of assembling operations can be reduced and the assembly time can be reduced.
[0035]
When the switch is internally short-circuited, the internal pressure that has risen through the pressure relief guide of the protective device can be quickly released from the opening of the switch by opening the switch body. Is kept low, and even a synthetic resin does not cause explosion.
[0036]
By opening the switch body, the weight can be reduced.
In addition, since the opening of the switch body is covered with protective equipment, it prevents contact with the charging part inside the switch from the outside. There is no electric shock and it is safe.
[0037]
By enclosing with a protective frame, the switch body can be protected from collisions with other equipment, etc., so the mechanical strength of the switch body, that is, the thickness of the switch body case can be reduced. Can be reduced in weight.
Workability is good because it can be mounted without removing the protective frame of the switch.
[0038]
Protection material on an insulating synthetic resin, the charging unit by using a synthetic rubber - can be small Ku in comparison with the case of the conventional metal casing an insulation distance between protector, thereby further downsizing .
[0039]
According to the present application , in addition to the above effect, there is an advantage that the discoloration and contact state of the movable electrode and the fixed electrode can be visually confirmed from the opening portion, and the maintenance work of the switch can be easily performed.
[0040]
In addition to the effects described above, by covering and closing the switch opening with a protective device made of synthetic rubber, it is possible to prevent dust from entering the switch, and by dust adhering to the electrode contact portion during storage or use There is an advantage that performance degradation such as energization performance and operation performance can be prevented.
[0041]
The present application, when storing multiple, because it is storage location in space of one minute, it is easy to storage space secured, it is possible to reduce the cost of storage. Even construction that uses multiple units can be transported with a single construction vehicle, so only one parking space is required for the construction vehicle and the construction vehicle at the construction site, which can reduce transportation costs. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an airborne construction switch with a protective frame according to the present invention .
FIG. 2 is a bottom view of the switch shown in FIG .
FIG. 3 is a front view of the switch shown in FIG .
FIG. 4 is a left side view of the switch shown in FIG .
FIG. 5 is a right side view of the switch shown in FIG .
6 is a left side view of the protective frame shown in FIG. 1. FIG .
7 is a front view of the mid-sized construction switch with protective frame shown in FIG. 1. FIG .
FIG. 8 is a rear view of the aerial work switch with protective frame shown in FIG. 1 ;
FIG. 9 is a left side view of the airframe construction switch with protective frame shown in FIG .
FIG. 10 is a diagram showing a column state of the mid-sized construction switch with protective frame shown in FIG. 1 ;
FIG. 11 is a cross-sectional view showing another embodiment of an aerial work switch with a protective frame .
FIG. 12 is an external view of a protector that is an embodiment of claim 2 ;
FIG. 13 is an external view of a protector that is an embodiment of claim 3 ;
14 (a) is a front view and FIG. 14 (b) is a right side view of an aerial work switch with a protective frame that is an embodiment of claim 4. FIG .
15A is a front view of a stacked state, and FIG. 15B is a right side view of the stacked state .

Claims (1)

  A switch made of an insulating synthetic resin having an opening, and a column part that is attached to the switch body so as to surround the switch and can be attached to a power pole without being removed from the switch. A switch for aerial type construction with a protective frame comprising a protective frame and a protective device that covers the opening of the switch and has a pressure release guide part,
  Provided with a protective frame structure in which the protective frame has a structure that allows the upper surface and the bottom surface of the protective frame to be fitted, and when the switches are stacked, the protective frame structure that fits the upper surface and the bottom surface of the opposing protective frame Air conditioner construction switch.

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