JP2012034460A - Interphase spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interphase spacer whose attaching work is simple, whose appearance when a conductor is attached is sufficient and which can suppress plastic deformation and damage.SOLUTION: The interphase spacer is attached across conductors 2 and 2 stretched in parallel and holds an interval between the conductors 2 and 2. The spacer includes: a pair of conductor grips 20 and 20 gripping the conductors 2 and 2; an insulator 30 coupled between the pair of conductor grips 20 and 20; and stretching means 40 which is coupled between the pair of conductor grips 20 and 20 and can stretch the full length of the interphase spacer 10.

Description

  The present invention relates to an interphase spacer that maintains a gap between conductors such as high-voltage electric wires.

  A plurality of conductors such as high-voltage wires are usually stretched between steel towers. The conductors are stretched up and down or left and right substantially at a certain distance from each other. However, when galloping that greatly swings up and down and left and right occurs due to strong winds or icing, the conductors are abnormally close to each other or contacted. However, there is a risk of causing a short circuit accident between phases.

  Therefore, conventionally, in order to keep the interval between conductors constant, interphase spacers are attached at predetermined intervals so as to straddle between conductors (see, for example, Patent Document 1).

JP 2003-224924 A

  By the way, as described above, the conductor is stretched between the steel towers so that the distance between the conductors is constant. However, some errors occur due to the tension applied to the conductor, the elongation of the conductor itself, and the like. For this reason, when an interphase spacer with a constant length is used, the length is not sufficient, and it is necessary to install the conductor with the conductors pulled in the adjacent direction, or conversely, the interspace spacer must be attached with an extra length. was there. For this reason, the mounting operation is complicated, and the plurality of interphase spacers are mounted at different angles, so that the appearance after mounting is not good.

  In Patent Document 1, an interphase spacer including a replaceable rod and a plurality of rods each having a different length are prepared, and the length of the interphase spacer is changed to a conductor interval by appropriately replacing the rod according to the conductor interval. It is described that the length is approximately the same. However, since the rods are manufactured with relatively large intervals, for example, in increments of 100 mm, fine adjustment cannot be performed, and eventually the length is excessive or insufficient.

  In addition, tensile stress, compressive stress, bending stress, etc. are applied to the interphase spacer due to swinging of the conductor due to strong wind or icing, but if this becomes excessive, the members constituting the interphase spacer will be plastically deformed or damaged. Sometimes, I had to repair it. At this time, it is necessary to remove the interphase spacer from the conductor, so that the repair work is complicated and expensive.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an interphase spacer that solves the above-mentioned problems, has a simple mounting operation, has a good appearance when a conductor is mounted, and can suppress plastic deformation and breakage. And

  In order to solve the above problems, the interphase spacer of the present invention is an interphase spacer 10 that is attached across the conductors 2 and 2 that are stretched substantially in parallel with each other, and that maintains an interval between the conductors 2 and 2. A pair of conductor gripping portions 20, 20 that grip the conductors 2, 2, an insulator 30 connected between the pair of conductor gripping portions 20, 20, and a pair of conductor gripping portions 20, 20 connected to each other, the interphase spacer 10 It is characterized by comprising expansion / contraction means 40 capable of expanding / contracting the entire length.

  Specifically, the expansion / contraction means 40 has three or more pivot insertion holes 41a,..., One base 41 connected to one conductor gripping portion 20, and two or more pivot insertion holes 42a. Are provided, and the other base material 42 connected to the other conductor gripping portion 20 is provided, and the pivot insertion hole 41a of the one base material 41 and the pivot insertion hole 42a of the other base material 42 are provided.・ Two pivots 43 and 43 are inserted across the two.

  Further, the pivot insertion holes 41a,... Of the one base member 41 are continuously drilled at an interval narrower than the diameter of the pivot insertion hole 41a.

  Further, there is provided a hinge inducing means 60 for generating a hinge prior to plastic deformation or breakage of the interphase spacer 10.

  Specifically, the hinge inducing means 60 is inserted over at least two members, and the strength of one pivot 61 among the two pivots 61, 62 connecting the members is smaller than that of the other pivot 62. It becomes by doing.

  Further, the strength of one pivot 61 is smaller than that of the other pivot 62 across the pivot insertion hole 41a of the one base 41 of the expansion / contraction means 40 and the pivot insertion hole 42a of the other base 42. Two pivot shafts 61 and 62 are inserted.

  In the interphase spacer according to the present invention, the interphase spacer is provided with expansion / contraction means that can expand and contract the entire length of the interphase spacer, so that the total length of the interphase spacer can be expanded and contracted according to the interval of the conductor, and the attachment work to the conductor is easy. In addition, the interphase spacer can be attached in a straight state, and the appearance when attached to the conductor can be improved.

  In addition, as expansion / contraction means, a configuration is adopted in which two pivot insertion holes are selected from three or more pivot insertion holes drilled in one base material, the pivots are inserted, and the base materials are connected to each other. Therefore, the total length of the interphase spacer can be finely adjusted simply by changing the insertion position of the pivot, making it easier to attach the interphase spacer to the conductor and improving the appearance when attached to the conductor. It can be made even better. Moreover, since the two pivots are inserted, the base materials are connected in a state where the relative rotations of the two pivots are constrained.

  Furthermore, the pivot insertion hole of one base material is continuously drilled at an interval narrower than the diameter of the pivot insertion hole, so that finer fine adjustment can be performed, and the interphase spacer is attached to the conductor. The work can be further facilitated, and the appearance when attached to the conductor can be further improved.

  In addition, since hinge induction means is provided to generate hinges prior to plastic deformation and breakage of interphase spacers, if the conductor swings and excessive stress is applied, the hinges are moved before plastic deformation or breakage occurs. Can be generated. As a result, the movable range of the interphase spacer is expanded, and further stress is suppressed from being applied to the interphase spacer, so that plastic deformation and breakage of the interphase spacer can be suppressed.

  Further, the hinge inducing means is configured to be inserted across at least two members, and one of the two pivots connecting the members has a strength lower than that of the other pivot. Therefore, even if one pivot is broken by excessive stress and is connected only by the other pivot, that is, when a hinge is generated, it can be repaired by simply replacing one pivot. It can be performed easily and at low cost.

  Furthermore, since the base materials of the expansion / contraction means are connected by a hinge induction means whose strength of one pivot is smaller than that of the other pivot, the expansion / contraction means and the members constituting the hinge induction means can be shared. Thus, cost reduction can be achieved.

(A) which shows the interphase spacer which concerns on embodiment of this invention is a top view, (b) is a side view. (A) which shows the connection state of a conductor holding part and an insulator is a top view, (b) is a side view. It is a disassembled perspective view which shows an expansion-contraction means. It is a disassembled perspective view which shows the connection state of a rod and a link. It is a disassembled perspective view which shows the connection state of an insulator and expansion-contraction means. It is a top view which shows the intermediate | middle board and outer plate of the interphase spacer of different embodiment. Furthermore, (a) which shows the interphase spacer of different embodiment is a top view, (b) is a side view. It is a disassembled perspective view which shows the expansion-contraction means of the interphase spacer shown in FIG. It is the schematic which shows the attachment state to the conductor of an interphase spacer.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 9, the interphase spacer 10 according to the first embodiment of the present invention is attached across the conductors 2 and 2 stretched between the steel towers 1 and 1 so as to be substantially parallel to each other. By keeping the distance between 2 and 2, the conductors 2 and 2 are prevented from abnormally approaching or contacting each other due to galloping.

  Further, the interphase spacer 10 is connected between a pair of conductor gripping portions 20 and 20 for gripping the conductors 2 and 2 and a pair of conductor gripping portions 20 and 20, as shown in FIGS. An insulator 30 for preventing a short circuit between phases through the interphase spacer 10, an expansion / contraction means 40 that is connected between the pair of conductor gripping portions 20, 20 and expands / contracts the entire length of the interphase spacer 10, and a pair of conductor gripping portions 20, 20 The rod 50 is connected between the rods 50 and roughly adjusts the length of the interphase spacer 10, and the hinge inducing means 60 generates a hinge prior to plastic deformation or breakage of the interphase spacer 10.

  Specifically, the conductor gripping portion 20 includes a clamp 21 and a clevis 22 that grip the conductor 2 as shown in FIGS. The clamp 21 overlaps a pair of gripping pieces 23 and 23 having semicircular groove portions so that the groove portions face each other, and pivotally attaches one end of the gripping pieces 23 and 23 to each other with a pin 24. The other end of the gripping piece 23 is provided with a spring 25 for urging the other gripping piece 23 toward the one gripping piece 23, and when the conductor 2 is set in the groove of the gripping pieces 23, 23, the spring 25 is attached. The conductor 2 is gripped by the force. The clevis 22 is formed integrally with one gripping piece 23.

  The insulator 30 is a polymer insulator 31 in which a silicone rubber is sheathed on a core material made of, for example, glass fiber reinforced plastic, and connectors 32 and 32 having bolt holes are disposed at both ends. In addition to the polymer insulator 31, the insulator 30 may be a variety of known insulators such as ceramics.

  As shown in FIG. 3, the expansion / contraction means 40 has a bolt hole on one side and a plurality of bolts (three or more, for example, eight as shown in FIG. 3) along the material axis direction on the other side. A pair of middle plates (base materials) 41 and 41 in which holes (pivot insertion holes) 41a are formed, and two bolt holes on one side along the axis direction of the material, a total of four bolt holes (pivot insertion holes) 42a... A pair of outer plates (base materials) 42 and two bolts 41a, 42a between the intermediate plate 41 and the outer plate 42 on one side, a total of four bolts (pivotal axes) ) 43... And a nut screwed into the bolt 43. The interval between the plurality of bolt holes 41a in the intermediate plate 41 is approximately half the interval between the bolt holes 42a, 42a drilled on one side of the outer plate 42.

  The ends of the pair of intermediate plates 41, 41 on the side where the plurality of bolt holes 41a are formed are opposed to each other, and the bolt holes 42a formed in the pair of outer plates 42, 42 are opposed to each other. And a pair of outer plates such that the bolt holes 41a formed in the pair of intermediate plates 41 and 41 communicate with each other and the pair of outer plates 42 and 42 sandwich the pair of intermediate plates 41 and 41. 42 and 42 are superposed on the pair of middle plates 41 and 41, and the bolt holes 42a of the pair of outer plates 42 and 42 and the bolt holes 41a of the pair of middle plates 41 and 41 are connected. The two bolts 43 are inserted on one side, a total of four, and nuts are screwed onto the bolts 43 protruding from the side opposite to the insertion side, so that the intermediate plate 41 and the outer plate 42 are connected. They are connected in a state where their relative rotation is constrained.

  The length of the expansion / contraction means 40 is adjusted by removing the bolts 43 once and moving the middle plates 41, 41 in the approaching direction when shortening them, and moving the middle plates 41, 41 in the separating direction when lengthening them. This is done by inserting the bolts 43 again. The length of the expansion / contraction means 40 may be adjusted based on the measured value by measuring the distance between the conductors 2 and 2 in advance before attaching the interphase spacer 10 to the conductors 2 and 2. Although desirable, it may be performed by removing only the bolts 43...

  The rod 50 is, for example, a round pipe having bolt holes drilled at both ends, and is interposed between the conductor gripping portions 20 and 20 in an exchangeable manner. Then, for example, a plurality of types of rods 50 having different lengths in increments of 100 mm are prepared, and the rods 50 are replaced to roughly adjust the length of the interphase spacer 10. Note that the rod 50 does not have to be used when the rough length adjustment of the interphase spacer 10 is not required.

  The hinge inducing means 60 is inserted over at least two members, and the strength of one bolt 61 of the two bolts (pivotal axes) 61 and 62 that connect the members so as to restrain the rotation of each other. It is configured by making it smaller than the other bolt 62. Specifically, as shown in FIG. 4, of the two bolts 61 and 62 used for connecting the link 70 and the rod 50, the shaft diameter of one bolt 61 is smaller than the shaft diameter of the other bolt 62. Is made up of. In addition to making the shaft diameter of one bolt 61 small, the material strength of one bolt 61 may be made small so that the breaking strength can be made small even if it is a coaxial diameter. The cross-sectional area may be reduced by providing a notch in one of the two bolts using the same material.

  Next, the connection state of the conductor gripping part 20, the insulator 30, the expansion / contraction means 40 and the rod 50 will be described in detail. As shown in FIGS. 2 (a) and 2 (b), the one conductor gripping portion 20 and the coupling tool 32 on one side of the lever 30 insert the coupling tool 32 of the lever 30 into the clevis 22 of the conductor gripping portion 20, Each bolt hole is connected, and the bolt is inserted and the nut is screwed together. For this reason, the insulator 30 is rotatable in a direction parallel to the conductor 2 and connected in a state in which the rotation is restricted in a direction orthogonal to the conductor 2.

  Further, the coupling tool 32 on the other side of the insulator 30 and one side of the expansion / contraction means 40 are coupled via a pair of connection plates 80 and 80 as shown in FIG. The connecting plate 80 is extended in a direction orthogonal to the base 81 from a base 81 having two bolt holes drilled in the material axial direction and both side ends of the base 81 parallel to the material axial direction. The rotation restricting pieces 82 and 82 are substantially U-shaped in cross section. The other end of the lever 30 of the insulator 30 and the end of the middle plate 41 of the expansion / contraction means 40 are opposed to each other, and the pair of connection plates 80 and 80 are connected to each other so that the respective bolt holes communicate with each other. The insulator 30 and the expansion / contraction means 40 are connected by externally fitting over the intermediate plate 41, inserting the bolt into the connected bolt hole, and screwing the nut into the bolt protruding from the connection plate 80. Therefore, the insulator 30 and the expansion / contraction means 40 are rigidly connected, and are connected in a state in which rotation is restricted in any direction.

  Moreover, the other side of the expansion-contraction means 40 and the one side of the rod 50 are connected via a pair of connection plates 90 and 90, as shown to Fig.1 (a) (b). These connection plates 90, 90 are extended in the direction orthogonal to the base from both ends parallel to the material axis direction of the base, similarly to the connection plate 80 used for connecting the insulator 30 and the expansion / contraction means 40. The other side of the expansion / contraction means 40 and one side of the rod 50 are rigidly connected, and are connected in a state in which rotation is restricted in any direction.

  Further, the other side of the rod 50 and the other conductor gripping portion 20 are connected via a link 70 and a pair of connection plates 100, 100 as shown in FIG. In the link 70, one bolt hole is formed on the conductor gripping portion 20 side, and two bolt holes 70a and 70a having different diameters are formed on the rod 50 side. The connection plate 100 has substantially the same shape as the connection plate 90 used for connecting the expansion / contraction means 40 and the rod 50, but the rotation restricting pieces 102 and 102 extend from the conductor gripping portion 20 side of the base portion 101. It has not been. Further, two bolt holes 101a and 101a having different diameters are formed on the conductor gripping part 20 side of the base 101 at positions facing the bolt holes 70a and 70a of the link 70.

  Then, the link 70 and the rod 50 are rigidly connected to each other by two hinges 61, 62 in which one bolt 61 is smaller in diameter than the other bolt 62, that is, the hinge inducing means 60, via the connection plates 100, 100. The rotation is constrained in any direction. The link 70 and the other conductor gripping portion 20 are inserted into the clevis 22 formed on one side of the conductor gripping portion 20 so that the respective bolt holes are connected, the bolts are inserted, and the nuts are screwed. They are linked together. Therefore, the link 70 is rotatable in a direction parallel to the conductor 2, and the rotation is restricted in a direction orthogonal to the conductor 2.

  Accordingly, the interphase spacer 10 attached between the conductors 2 and 2 functions as an elastic body whose both ends can rotate only in a direction parallel to the conductors 2 and 2. The compressive stress and bending stress due to are usually absorbed by the interphase spacer 10 as a whole curved in an arcuate shape. Further, when an excessive stress that causes plastic deformation or breakage is applied to the interphase spacer 10, one bolt 61 of the hinge inducing means 60 is broken, and the rigid joint in which rotation is restricted by the two bolts 61 and 62. From this, it becomes a rotatable pin joint state (hinge joint state) with one bolt 62 as an axis, expands the movable range of the interphase spacer 10, and suppresses further stress from being applied to the interphase spacer 10. 10 plastic deformation and breakage are prevented. At this time, since the pin joint is in the vicinity of the end of the interphase spacer 10, most of the entire length of the interphase spacer 10 remains as an elastic body. It can continue to prevent contact.

  As described above, the interphase spacer 10 of the present invention includes the hinge inducing means 60 configured by making one bolt 61 less stronger than the other bolt 62 out of the two bolts 61 and 62 connecting the members. Therefore, even if one bolt 61 breaks due to excessive stress and a hinge is generated, it is only necessary to replace one bolt 61, and repair work can be performed easily and at low cost. it can.

  Further, since the expansion / contraction means 40 is provided, the entire length of the interphase spacer 10 can be expanded and contracted in accordance with the interval between the conductors 2 and 2, and attachment work to the conductors 2 and 2 is facilitated. Since it can be attached in a straight state, the appearance when attached to the conductors 2 and 2 can be improved.

  In particular, as the expansion / contraction means 40, two bolt holes 41a, 41a are selected alternatively from the plurality of bolt holes 41a formed in the intermediate plate 41 and the bolts 43, 43 are inserted, Since the structure connecting the outer plate 42 is adopted, the total length of the interphase spacer 10 can be finely adjusted according to the interval between the conductors 2 and 2, and the interphase spacer 10 can be attached to the conductors 2 and 2. The work is further facilitated, and the appearance when attached to the conductors 2 and 2 can be further improved.

  Next, different embodiments of the present invention will be described in detail with reference to the drawings. In the interphase spacer 10 according to the second embodiment of the present invention, as shown in FIG. 6A, the interval between the bolt holes 41a of the middle plate 41 of the expansion / contraction means 40 is smaller than the diameter of the bolt hole 41a. In other words, the bolt holes 41a are formed so as to overlap each other, and the bolt holes 41a are communicated with each other.

  In this way, by finely drilling the bolt holes 41a, it becomes possible to make finer fine adjustments, and the work of attaching the interphase spacer 10 to the conductors 2 and 2 becomes easier, and the conductor The appearance when attached to 2, 2 can be further improved. Further, since the movement of the bolt 43 is restrained by the remaining piece 41b... Remaining between the bolt holes 41a, 41a, the bolt 43 does not move in the bolt hole 41a. Even if it receives the applied force due to the vibrations 2 and 2, it is possible to maintain the initial installation state. It should be noted that the drilling interval of the bolt holes 41a... Only needs to be smaller than the diameter of the bolt hole 41a. For example, as shown in FIG. 6 (b), the bolt holes 41a are continuously drilled at a slight interval. Thus, a state in which the remaining pieces 41b are eliminated, that is, a long hole may be formed. In this way, by forming the elongated hole shape, it is not necessary to remove the bolt 43 that connects the intermediate plate 41 and the outer plate 42 when the expansion / contraction means 40 is expanded and contracted, and the interphase spacer 10 is connected to the conductors 2 and 2. Even in the attached state, the telescopic work can be easily performed.

  Next, further different embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 7 and 8, the interphase spacer 10 according to the third embodiment of the present invention includes a plurality of bolt holes 41a in the middle plate 41 of the expansion / contraction means 40 in two rows along the material axis direction. The bolt hole diameter of one row is made smaller than the bolt hole diameter of the other row. In addition, two bolt holes 42a of the outer plate 42 are formed in a direction perpendicular to the material axis direction, and similarly to the middle plate 41, one bolt hole diameter is made smaller than the other bolt hole diameter. Yes.

  Then, one of the two bolts 61 and 62, which is inserted across the intermediate plate 41 and the outer plate 42 and connected so as to restrain the relative rotation of each other, has a smaller diameter than the other bolt 62. In other words, the hinge inducing means 60 is used.

  Thus, by connecting the middle plate 41 and the outer plate 42 of the expansion / contraction means 40 by the hinge induction means 60, it becomes possible to share the members constituting the expansion / contraction means 40 and the hinge induction means 60, thereby reducing the cost. it can. In the third embodiment, two rows of bolt holes 41a and 42a are formed only on one side of one of the middle plate 41 and the outer plate 42, but the other middle plate 41 and outer plate 42 are provided. Two rows of bolt holes may be drilled on the other side of the first plate, and the hinge inducing means 60 may be used to connect the other middle plate 41 and the other side of the outer plate 42.

  Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, in the above embodiment, the insulator 30, the expansion / contraction means 40, the rod 50, and the hinge inducing means 60 are provided between the pair of conductor gripping portions 20 and 20, respectively. It may be provided. Moreover, although the bolts 43, 61, and 62 were used for the connection between the intermediate plate 41 and the outer plate 42, the present invention is not limited to the bolt, and any rod-like one can be used as appropriate. Further, in the connection between the lever 30 and the expansion / contraction means 40, the connection between the expansion / contraction means 40 and the rod 50, and the connection between the rod 50 and the link 70, the connection is made through the connection plate as in the above embodiment. In addition, various connection methods such as welding may be used as long as the connection methods constrain the mutual rotation.

  Further, as in the first and second embodiments, in addition to drilling a plurality of (three or more) bolt holes 41a... A plurality of bolt holes 41 a... May be formed only in one middle plate 41. Further, a plurality of (three or more) bolt holes 42 a... May be formed in the outer plate 42. Further, as the expansion / contraction means 40, in addition to the above-described form, any one that can change the length, such as a fan-shaped vernier fitting or a tumble buckle, can be used as appropriate.

  Further, as the hinge inducing means 60, in addition to reducing the strength of one of the two bolts 61, 62 as in the above embodiment, the rotation restriction of any of the connection plates 80, 90, 100 is restricted. The piece may be easily deformed, and when an excessive stress is applied, the rotation restricting piece may be opened outward to become a freely rotatable hinge. In short, any joining method may be used as long as the joining is rigid joining below a certain stress and pin joining when exceeding a certain stress. Further, the hinge inducing means 60 is not limited to the description of the above embodiment, and may be used at any position of the interphase spacer 10. Furthermore, in the above embodiment, the hinge inducing means 60 forms a hinge that can rotate in a direction parallel to the conductor 2, but a hinge that can rotate in a direction orthogonal to the conductor 2 is formed. They may be used in combination.

  2 .. Conductor 10 .. Interphase spacer 20 .. Conductor gripping part 30.. Insulator 40.. Expansion means 41.. Middle plate 42.. Outer plate 41 a 42 a Bolt hole 43 61, 62 .. bolts, 60 .. hinge inducing means,

Claims (6)

  An interphase spacer that is mounted across the conductors (2) and (2) that are stretched substantially in parallel with each other and that keeps the distance between the conductors (2) and (2), and holds the conductors (2) and (2) A pair of conductor gripping portions (20), (20), an insulator (30) connected between the pair of conductor gripping portions (20), (20), and a pair of conductor gripping portions (20), (20) And an expansion / contraction means (40) capable of expanding and contracting the entire length of the interphase spacer (10).   The expansion / contraction means (40) has three or more pivot insertion holes (41a...), One base (41) connected to one conductor gripping portion (20), and two or more pivots. An insertion hole (42a,...) Is provided, and the other base material (42) connected to the other conductor gripping part (20) is provided, and the pivot insertion hole (41a,. ) And the pivot insertion hole (42a,...) Of the other base member (42), the two pivot shafts (43) (43) are inserted through the interphase spacer according to claim 1.   The interphase spacer according to claim 2, wherein the pivot insertion holes (41 a...) Of one base material (41) are continuously drilled at an interval narrower than the diameter of the pivot insertion hole (41 a).   The interphase spacer according to any one of claims 1 to 3, further comprising hinge inducing means (60) for generating a hinge prior to plastic deformation or breakage of the interphase spacer (10).   The hinge inducing means (60) is inserted across at least two members, and of the two pivots (61) (62) connecting the members, the strength of one pivot (61) is increased to the other pivot ( 62) The interphase spacer according to claim 4, wherein the interphase spacer is smaller than 62).   One pivot (61) straddling the pivot insertion hole (41a...) Of one base material (41) of the telescopic means (40) and the pivot insertion hole (42a...) Of the other base material (42). The interphase spacer according to claim 5, wherein two pivots (61) (62) having a lower strength than the other pivot (62) are inserted.