Ground-mounted equipment

Abstract

To suppress inflow of moisture from an underground and facilitate work of fixing a cable by increasing adhesion to the cable in ground-mounted equipment.SOLUTION: A cable support rubber has a body portion and a cable proximal portion. The body portion has a first compression ratio and the cable proximal portion has a second compression ratio, the second compression ratio being higher than the first compression ratio.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to ground-based equipment. [Background technology]

[0002] Since above-ground equipment is equipment that houses a transformer, a switchgear, and a disconnector in an outer box and is installed on the side of a road for underground power distribution, the power cable used for connection must be drawn from underground. Therefore, the base that supports the outer box and the transformer part installed at the bottom of the equipment has an opening for drawing in the cable.

[0003] In addition, a bottom plate is fixed to the opening in the base for pulling in the cable to reduce the opening area to prevent small animals from entering and moisture from flowing in. The bottom plate has a cable holder for holding the cable used to connect to the device (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-266065 A Summary of the Invention [Problem to be solved by the invention]

[0005] For example, the part of the cable holder that comes into contact with the cable has a cable support rubber that holds the cable in place. The cable is held in place by fastening the cable support rubber through a part of the bottom plate or directly with a bolt or the like.

[0006] In this type of structure, when the cable is held in place, the cable support rubber is not compressed sufficiently, causing a gap between the cable and the rubber, which can allow moisture to enter from underground.

[0007] However, if the hardness of the entire cable support rubber is softened in order to increase the compressibility of the rubber, deformation will increase, raising concerns about further widening of the gap and reduced cable retention force.

[0008] Furthermore, when reinstalling ground-based equipment or redoing wiring, the cables retain their natural kinks from storage conditions and reuse, which causes significant resistance when fastening them to the cable support rubber, requiring a lot of work.

[0009] An object of the present invention is to suppress the inflow of moisture from underground and to facilitate the work of fixing the cable by improving the adhesion between ground-installed equipment and the cable. [Means for solving the problem]

[0010] One embodiment of the ground-installed equipment of the present invention is a ground-installed equipment that stores equipment connected via a cable pulled in from underground, and has a cable support rubber that holds the cable, the cable support rubber having a main body portion and a cable adjacent portion, the main body portion having a first compression rate and the cable adjacent portion having a second compression rate, the second compression rate being higher than the first compression rate. Effect of the Invention

[0011] According to one aspect of the present invention, in ground-installed equipment, the inflow of moisture from underground can be suppressed by improving adhesion to the cable, and the work of fixing the cable can be facilitated. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a diagram illustrating an example of the appearance of a ground-installed device. [Diagram 2] FIG. 2 is a cross-sectional view (cross-section AA) of the base of the ground-installed equipment. [Diagram 3] FIG. 4 is a perspective view showing the cable holding portion / bottom plate. [Figure 4] 1 is a cross-sectional view (BB cut surface) showing the cable holding portion / bottom plate. FIG. [Diagram 5]FIG. 1 is a diagram showing the shape (type 1) of a cable support rubber. [Figure 6] FIG. 13 is a diagram showing the shape (type 2) of the cable support rubber. [Figure 7] FIG. 2 is a perspective view showing a cable support rubber (type 1) of the first embodiment. [Figure 8] FIG. 2 is a perspective view showing a cable support rubber (type 2) of the first embodiment. [Figure 9] FIG. 11 is a perspective view showing a cable support rubber (type 2) according to a second embodiment. [Figure 10] FIG. 11 is a perspective view showing a cable support rubber (type 1) of Example 3. [Figure 11] FIG. 11 is a perspective view showing a cable support rubber (type 2) of the third embodiment. [Figure 12] FIG. 11 is a perspective view showing a cable support rubber (type 1) of Example 4. [Figure 13] FIG. 11 is a perspective view showing a cable support rubber (type 2) of Example 4. [Figure 14] FIG. 13 is a perspective view showing a cable support rubber (type 2) of Example 5. [Figure 15] FIG. 4 is a perspective view showing an example of a fitting structure of a cable support rubber. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiments will be described with reference to the drawings.

[0014] First, the configuration of the ground-installed equipment will be described with reference to Figs. As shown in Fig. 1, the ground-installed equipment is an underground power distribution device that is installed at the side of a road or the like, and contains a transformer 102 and a switch or disconnector 103 in an outer case 101. A cable 104 used for connection is drawn from underground. For this reason, a base 105 that supports the outer case 101 and the transformer 102, which are provided at the bottom of the ground-installed equipment, has an opening 106 for drawing in the cable 104.

[0015] In addition, a bottom plate 107 is fixed to the opening 106 for pulling in a cable provided in the base 105 in order to reduce the opening area to prevent the intrusion of small animals and the inflow of moisture. The bottom plate 107 has a cable holding mechanism for holding the cable 104 used for connecting to a device.

[0016] Next, the configuration of the cable holding mechanism will be described with reference to FIGS.

[0017] The cable holding mechanism is composed of a cable support rubber 202 that holds the cable 104, and a cable holding part 201. The cable support rubber 202 is located in the portion that comes into contact with the cable 104. The cable support rubber 202 holds the cable 104 by being fastened with a bolt 203 via the cable holding part 201.

[0018] The cable holding portion 201 is provided around the cable support rubber 202, and holds the cable support rubber 202 with a bolt 203. The cable holding portion 201 is formed of, for example, metal.

[0019] Next, the types of the cable support rubber 202 will be described with reference to FIGS. 5 shows the shape of the cable support rubber 202 of Type 1. Type 1 is a type that holds multiple cables 104 together. 6 shows the shape of the cable support rubber 202 of Type 2. Type 2 is a type that holds the cables 104 one by one. EXAMPLES

[0020] 7 and 8 show the cable support rubber of the ground-installed equipment of the embodiment 1. Fig. 7 shows the application of the embodiment 1 to the type 1 that collectively holds a plurality of cables 104. Fig. 8 shows the application of the embodiment 1 to the type 1 that holds the cables 104 one by one.

[0021] The cable support rubber 202 has a main body portion and a cable proximal portion, the main body portion having a first compressibility and the cable proximal portion having a second compressibility, the second compressibility being higher than the first compressibility.

[0022] Specifically, hard rubber 301 is used for the main body of cable support rubber 202, and soft rubber 302 is used around the entire circumference of the part adjacent to the cable.

[0023] This configuration increases the compression rate of the rubber 302 in the vicinity of the cable, and improves adhesion to the cable 104. This suppresses the inflow of moisture from underground. Furthermore, it makes it easier to mold the cable support rubber 202 to the bent cable 104, and makes it easier to fix the cable 104. EXAMPLES

[0024] FIG. 9 shows a second embodiment of the cable support rubber for ground-mounted equipment. FIG. 9 shows an application of the second embodiment to the type 1 which holds the cables 104 one by one.

[0025] The cable support rubber 202 has a main body portion and a cable proximal portion, the main body portion having a first compressibility and the cable proximal portion having a second compressibility, the second compressibility being higher than the first compressibility.

[0026] Specifically, hard rubber 301 is used for the main body of cable support rubber 202, and soft rubber 302 is used for a portion adjacent to the cable.

[0027] This configuration increases the compression rate of the rubber 302 in the vicinity of the cable, and improves adhesion to the cable 104. This suppresses the inflow of moisture from underground. Furthermore, it makes it easier to mold the cable support rubber 202 to the bent cable 104, and makes it easier to fix the cable 104. EXAMPLES

[0028] Figures 10 and 11 show Example 3 of the cable support rubber for ground-based equipment. Figure 10 shows Example 3 applied to Type 1 that collectively holds multiple cables 104. Figure 11 shows Example 3 applied to Type 1 that holds each cable 104 individually.

[0029] 10 and 11, 304 denotes an inclined portion. Cable support rubber 202 uses hard rubber 301 for the main body of cable support rubber 202. In addition, inclined portion 304 is provided for the insertion opening of cable 104 adjacent to the cable, so that the diameter of the insertion opening of cable 104 becomes wider. Inclined portion 304 is provided so as to change the volume of cable support rubber 202 by partially reducing the cross-sectional shape of cable support rubber 202.

[0030] In this way, by reducing a part of the cross-sectional shape of the cable holding part and changing the volume, the compression rate of the rubber in the vicinity of the cable is increased, and the adhesion to the cable is improved. This prevents moisture from entering from underground. Furthermore, it makes it easier to mold the cable support rubber 202 to the twisted cable 104, and makes it easier to fix the cable 104.

[0031] In addition, as shown in Figures 10 and 11, by providing an inclined portion 304 at the entrance and exit of cable 104, it has the effect of making it easier for cable 104 to enter even if cable 104 is not aligned in a straight line with cable support rubber 202 when cable 104 is attached. EXAMPLES

[0032] 12 and 13 show a cable support rubber of a ground-installed device according to Example 4. Example 4 is a combination of the configurations of Example 1 and Example 3.

[0033] Fig. 12 shows the application of the fourth embodiment to type 1 which collectively holds a plurality of cables 104. Fig. 12 shows the application of the fourth embodiment to type 1 which holds the cables 104 one by one.

[0034] 12 and 13, 304 indicates an inclined portion. The cable support rubber 202 has a main body portion and a cable proximate portion. The main body portion has a first compression ratio, and the cable proximate portion has a second compression ratio. In this case, the second compression ratio is higher than the first compression ratio.

[0035] Specifically, hard rubber 301 is used for the main body of cable support rubber 202, and soft rubber 302 is used around the entire circumference of the part adjacent to the cable.

[0036] Then, an inclined portion 304 is provided for increasing the diameter of the insertion opening for the cable 104 relative to the insertion opening for the cable 104 in the cable vicinity. The inclined portion 304 is provided so as to change the volume of the cable support rubber 202 by partially reducing the cross-sectional shape of the cable support rubber 202.

[0037] In this way, soft rubber 302 is used around the entire circumference of the cable adjacent portion of cable support rubber 202, and the cross-sectional shape of the cable adjacent portion is partially reduced to change the volume.

[0038] These two features increase the compression rate of the rubber 302 in the vicinity of the cable, and improve adhesion to the cable 104. This suppresses the inflow of moisture from underground. Furthermore, it makes it easier to mold the cable support rubber 202 to the bent cable 104, and makes it easier to fix the cable 104. EXAMPLES

[0039] Fig. 14 shows a cable support rubber of a ground-installed device of Example 5. Example 5 is a combination of the configuration of Example 2 and the configuration of Example 3. Fig. 15 shows the application of Example 5 to Type 1, which holds the cables 104 one by one.

[0040] In Fig. 14, 304 indicates an inclined portion. The cable support rubber 202 has a main body portion and a cable proximate portion. The main body portion has a first compression ratio, and the cable proximate portion has a second compression ratio. In this case, the second compression ratio is higher than the first compression ratio.

[0041] Specifically, hard rubber 301 is used for the main body of cable support rubber 202, and soft rubber 302 is used for a portion adjacent to the cable.

[0042] Then, an inclined portion 304 is provided for increasing the diameter of the insertion opening for the cable 104 relative to the insertion opening for the cable 104 in the cable vicinity. The inclined portion 304 is provided so as to change the volume of the cable support rubber 202 by partially reducing the cross-sectional shape of the cable support rubber 202.

[0043] In this way, soft rubber 302 is used in a portion of the cable support rubber 202 adjacent to the cable, and the cross-sectional shape of the cable adjacent portion is partially reduced to change the volume.

[0044] These two features increase the compression rate of the rubber 302 in the vicinity of the cable, and improve adhesion to the cable 104. This suppresses the inflow of moisture from underground. Furthermore, it makes it easier to mold the cable support rubber 202 to the bent cable 104, and makes it easier to fix the cable 104.

[0045] FIG. 15 is a perspective view showing an example of a fitting structure of the cable support rubber 202. As shown in FIG. As shown in FIG. 15, hard rubber 301 of the main body and soft rubber 302 in the vicinity of the cable are joined via a fitting portion 303 to prevent misalignment. [Explanation of symbols]

[0046] 101 Outer box 102 Transformer 103 Switchgear or disconnector 104 Cable 105 Base 106 Cable entry opening 107 Cable holder / bottom plate 108 Transformer mounting part 201 Cable holder and bottom metal part 202 Cable support rubber 203 Volts 301 Hard Rubber 302 Soft Rubber 303 Cable support rubber fitting 304 Slope

Claims

1. A ground-mounted device that houses equipment connected via a cable pulled in from underground, A cable support rubber is provided to hold the cable. The cable support rubber is A main body portion and a cable adjacent portion, the body portion has a first compressibility; the cable proximal portion has a second compressibility; the second compression ratio is greater than the first compression ratio; The main body portion is The rubber is made of a first rubber having a first hardness, The cable proximate portion is a second rubber having a second hardness; the second hardness is less than the first hardness; The cable support rubber is a sloped portion that widens the diameter of the cable insertion opening relative to the cable adjacent portion, The inclined portion is The cross-sectional shape of the cable support rubber is partially reduced to change the volume of the cable support rubber, An opening for pulling the cable from the underground, The cable pulled in through the opening is held by the cable support rubber, The cable support rubber is A ground-mounted device that is provided to prevent moisture from entering from the underground through the opening.

2. The second rubber is 2. The ground-installed equipment according to claim 1, wherein the first rubber is provided on an entire periphery thereof.

3. The second rubber is The ground-installed equipment according to claim 1, characterized in that the first rubber is provided on a part of the first rubber.

4. The main body portion and the cable adjacent portion are 2. The ground-installed equipment according to claim 1, wherein the ground-installed equipment is joined via a fitting portion for preventing misalignment.

5. 2. The ground-installed equipment according to claim 1, further comprising a cable holding portion provided around the cable support rubber and holding the cable support rubber with a bolt.

6. 2. The ground-installed equipment according to claim 1, wherein the equipment is a transformer, a switchgear or a disconnector.

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